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GNU C Library master sources branch release/2.25/master updated. glibc-2.25-112-gfc7ef00
- From: fw at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 4 Jan 2018 12:24:48 -0000
- Subject: GNU C Library master sources branch release/2.25/master updated. glibc-2.25-112-gfc7ef00
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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=fc7ef00f02ee41452245926a4f7ff2073711db33
commit fc7ef00f02ee41452245926a4f7ff2073711db33
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Oct 19 10:44:31 2017 +0200
nss_files: Avoid large buffers with many host addresses [BZ #22078]
The previous implementation had at least a quadratic space
requirement in the number of host addresses and aliases.
(cherry picked from commit d8425e116cdd954fea0c04c0f406179b5daebbb3)
diff --git a/ChangeLog b/ChangeLog
index fef9a01..c8c392e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,15 @@
2017-10-11 Florian Weimer <fweimer@redhat.com>
+ [BZ #22078]
+ Avoid large NSS buffers with many addresses, aliases.
+ * nss/nss_files/files-hosts.c (gethostbyname3_multi): Rewrite
+ using dynarrays and struct alloc_buffer.
+ * nss/Makefile (tests): Add tst-nss-files-hosts-multi.
+ (tst-nss-files-hosts-multi): Link with -ldl.
+ * nss/tst-nss-files-hosts-multi.c: New file.
+
+2017-10-11 Florian Weimer <fweimer@redhat.com>
+
[BZ #18023]
* nss/nss_files/files-hosts.c (gethostbyname3_multi): Use struct
scratch_buffer. Eliminate gotos.
diff --git a/NEWS b/NEWS
index 1537957..d84e1fa 100644
--- a/NEWS
+++ b/NEWS
@@ -60,6 +60,7 @@ The following bugs are resolved with this release:
[21915] getaddrinfo: incorrect result handling for NSS service modules
[21922] getaddrinfo with AF_INET(6) returns EAI_NONAME, not EAI_NODATA
[21972] assert macro requires operator== (int) for its argument type
+ [22078] nss_files performance issue in hosts multi mode
[22322] libc: [mips64] wrong bits/long-double.h installed
[22627] $ORIGIN in $LD_LIBRARY_PATH is substituted twice
diff --git a/nss/Makefile b/nss/Makefile
index def3860..1ec87de 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -57,6 +57,7 @@ xtests = bug-erange
# Tests which need libdl
ifeq (yes,$(build-shared))
tests += tst-nss-files-hosts-erange
+tests += tst-nss-files-hosts-multi
endif
# If we have a thread library then we can test cancellation against
@@ -142,3 +143,4 @@ $(objpfx)tst-cancel-getpwuid_r: $(shared-thread-library)
endif
$(objpfx)tst-nss-files-hosts-erange: $(libdl)
+$(objpfx)tst-nss-files-hosts-multi: $(libdl)
diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c
index 763fa39..6f7cc4d 100644
--- a/nss/nss_files/files-hosts.c
+++ b/nss/nss_files/files-hosts.c
@@ -23,6 +23,7 @@
#include <netdb.h>
#include <resolv/resolv-internal.h>
#include <scratch_buffer.h>
+#include <alloc_buffer.h>
/* Get implementation for some internal functions. */
@@ -116,24 +117,45 @@ DB_LOOKUP (hostbyaddr, ,,,
}, const void *addr, socklen_t len, int af)
#undef EXTRA_ARGS_VALUE
+/* Type of the address and alias arrays. */
+#define DYNARRAY_STRUCT array
+#define DYNARRAY_ELEMENT char *
+#define DYNARRAY_PREFIX array_
+#include <malloc/dynarray-skeleton.c>
+
static enum nss_status
gethostbyname3_multi (FILE * stream, const char *name, int af,
struct hostent *result, char *buffer, size_t buflen,
int *errnop, int *herrnop, int flags)
{
+ assert (af == AF_INET || af == AF_INET6);
+
/* We have to get all host entries from the file. */
struct scratch_buffer tmp_buffer;
scratch_buffer_init (&tmp_buffer);
struct hostent tmp_result_buf;
- int naddrs = 1;
- int naliases = 0;
- char *bufferend;
+ struct array addresses;
+ array_init (&addresses);
+ struct array aliases;
+ array_init (&aliases);
enum nss_status status;
- while (result->h_aliases[naliases] != NULL)
- ++naliases;
-
- bufferend = (char *) &result->h_aliases[naliases + 1];
+ /* Preserve the addresses and aliases encountered so far. */
+ for (size_t i = 0; result->h_addr_list[i] != NULL; ++i)
+ array_add (&addresses, result->h_addr_list[i]);
+ for (size_t i = 0; result->h_aliases[i] != NULL; ++i)
+ array_add (&aliases, result->h_aliases[i]);
+
+ /* The output buffer re-uses now-unused space at the end of the
+ buffer, starting with the aliases array. It comes last in the
+ data produced by internal_getent. (The alias names themselves
+ are still located in the line read in internal_getent, which is
+ stored at the beginning of the buffer.) */
+ struct alloc_buffer outbuf;
+ {
+ char *bufferend = (char *) result->h_aliases;
+ outbuf = alloc_buffer_create (bufferend, buffer + buflen - bufferend);
+ }
while (true)
{
@@ -170,110 +192,81 @@ gethostbyname3_multi (FILE * stream, const char *name, int af,
}
while ((matches = 0));
+ /* If the line matches, we need to copy the addresses and
+ aliases, so that we can reuse tmp_buffer for the next
+ line. */
if (matches)
{
- /* We could be very clever and try to recycle a few bytes
- in the buffer instead of generating new arrays. But
- we are not doing this here since it's more work than
- it's worth. Simply let the user provide a bit bigger
- buffer. */
- char **new_h_addr_list;
- char **new_h_aliases;
- int newaliases = 0;
- size_t newstrlen = 0;
- int cnt;
-
- /* Count the new aliases and the length of the strings. */
- while (tmp_result_buf.h_aliases[newaliases] != NULL)
+ /* Record the addresses. */
+ for (size_t i = 0; tmp_result_buf.h_addr_list[i] != NULL; ++i)
{
- char *cp = tmp_result_buf.h_aliases[newaliases];
- ++newaliases;
- newstrlen += strlen (cp) + 1;
+ /* Allocate the target space in the output buffer,
+ depending on the address family. */
+ void *target;
+ if (af == AF_INET)
+ {
+ assert (tmp_result_buf.h_length == 4);
+ target = alloc_buffer_alloc (&outbuf, struct in_addr);
+ }
+ else if (af == AF_INET6)
+ {
+ assert (tmp_result_buf.h_length == 16);
+ target = alloc_buffer_alloc (&outbuf, struct in6_addr);
+ }
+ else
+ __builtin_unreachable ();
+
+ if (target == NULL)
+ {
+ /* Request a larger output buffer. */
+ *errnop = ERANGE;
+ *herrnop = NETDB_INTERNAL;
+ status = NSS_STATUS_TRYAGAIN;
+ break;
+ }
+ memcpy (target, tmp_result_buf.h_addr_list[i],
+ tmp_result_buf.h_length);
+ array_add (&addresses, target);
}
- /* If the real name is different add it also to the
- aliases. This means that there is a duplication
- in the alias list but this is really the user's
- problem. */
- if (strcmp (old_result->h_name,
- tmp_result_buf.h_name) != 0)
+
+ /* Record the aliases. */
+ for (size_t i = 0; tmp_result_buf.h_aliases[i] != NULL; ++i)
{
- ++newaliases;
- newstrlen += strlen (tmp_result_buf.h_name) + 1;
+ char *alias = tmp_result_buf.h_aliases[i];
+ array_add (&aliases,
+ alloc_buffer_copy_string (&outbuf, alias));
}
- /* Make sure bufferend is aligned. */
- assert ((bufferend - (char *) 0) % sizeof (char *) == 0);
-
- /* Now we can check whether the buffer is large enough.
- 16 is the maximal size of the IP address. */
- if (bufferend + 16 + (naddrs + 2) * sizeof (char *)
- + roundup (newstrlen, sizeof (char *))
- + (naliases + newaliases + 1) * sizeof (char *)
- >= buffer + buflen)
+ /* If the real name is different add, it also to the
+ aliases. This means that there is a duplication in
+ the alias list but this is really the user's
+ problem. */
+ {
+ char *new_name = tmp_result_buf.h_name;
+ if (strcmp (old_result->h_name, new_name) != 0)
+ array_add (&aliases,
+ alloc_buffer_copy_string (&outbuf, new_name));
+ }
+
+ /* Report memory allocation failures during the
+ expansion of the temporary arrays. */
+ if (array_has_failed (&addresses) || array_has_failed (&aliases))
{
- *errnop = ERANGE;
+ *errnop = ENOMEM;
*herrnop = NETDB_INTERNAL;
- status = NSS_STATUS_TRYAGAIN;
+ status = NSS_STATUS_UNAVAIL;
break;
}
- new_h_addr_list =
- (char **) (bufferend
- + roundup (newstrlen, sizeof (char *))
- + 16);
- new_h_aliases =
- (char **) ((char *) new_h_addr_list
- + (naddrs + 2) * sizeof (char *));
-
- /* Copy the old data in the new arrays. */
- for (cnt = 0; cnt < naddrs; ++cnt)
- new_h_addr_list[cnt] = old_result->h_addr_list[cnt];
-
- for (cnt = 0; cnt < naliases; ++cnt)
- new_h_aliases[cnt] = old_result->h_aliases[cnt];
-
- /* Store the new strings. */
- cnt = 0;
- while (tmp_result_buf.h_aliases[cnt] != NULL)
+ /* Request a larger output buffer if we ran out of room. */
+ if (alloc_buffer_has_failed (&outbuf))
{
- new_h_aliases[naliases++] = bufferend;
- bufferend = (__stpcpy (bufferend,
- tmp_result_buf.h_aliases[cnt])
- + 1);
- ++cnt;
- }
-
- if (cnt < newaliases)
- {
- new_h_aliases[naliases++] = bufferend;
- bufferend = __stpcpy (bufferend,
- tmp_result_buf.h_name) + 1;
+ *errnop = ERANGE;
+ *herrnop = NETDB_INTERNAL;
+ status = NSS_STATUS_TRYAGAIN;
+ break;
}
- /* Final NULL pointer. */
- new_h_aliases[naliases] = NULL;
-
- /* Round up the buffer end address. */
- bufferend += (sizeof (char *)
- - ((bufferend - (char *) 0)
- % sizeof (char *))) % sizeof (char *);
-
- /* Now the new address. */
- new_h_addr_list[naddrs++] =
- memcpy (bufferend, tmp_result_buf.h_addr,
- tmp_result_buf.h_length);
-
- /* Also here a final NULL pointer. */
- new_h_addr_list[naddrs] = NULL;
-
- /* Store the new array pointers. */
- old_result->h_aliases = new_h_aliases;
- old_result->h_addr_list = new_h_addr_list;
-
- /* Compute the new buffer end. */
- bufferend = (char *) &new_h_aliases[naliases + 1];
- assert (bufferend <= buffer + buflen);
-
result = old_result;
} /* If match was found. */
@@ -293,7 +286,47 @@ gethostbyname3_multi (FILE * stream, const char *name, int af,
if (status != NSS_STATUS_TRYAGAIN)
status = NSS_STATUS_SUCCESS;
+ if (status == NSS_STATUS_SUCCESS)
+ {
+ /* Copy the address and alias arrays into the output buffer and
+ add NULL terminators. The pointed-to elements were directly
+ written into the output buffer above and do not need to be
+ copied again. */
+ size_t addresses_count = array_size (&addresses);
+ size_t aliases_count = array_size (&aliases);
+ char **out_addresses = alloc_buffer_alloc_array
+ (&outbuf, char *, addresses_count + 1);
+ char **out_aliases = alloc_buffer_alloc_array
+ (&outbuf, char *, aliases_count + 1);
+ if (out_addresses == NULL || out_aliases == NULL)
+ {
+ /* The output buffer is not large enough. */
+ *errnop = ERANGE;
+ *herrnop = NETDB_INTERNAL;
+ status = NSS_STATUS_TRYAGAIN;
+ /* Fall through to function exit. */
+ }
+ else
+ {
+ /* Everything is allocated in place. Make the copies and
+ adjust the array pointers. */
+ memcpy (out_addresses, array_begin (&addresses),
+ addresses_count * sizeof (char *));
+ out_addresses[addresses_count] = NULL;
+ memcpy (out_aliases, array_begin (&aliases),
+ aliases_count * sizeof (char *));
+ out_aliases[aliases_count] = NULL;
+
+ result->h_addr_list = out_addresses;
+ result->h_aliases = out_aliases;
+
+ status = NSS_STATUS_SUCCESS;
+ }
+ }
+
scratch_buffer_free (&tmp_buffer);
+ array_free (&addresses);
+ array_free (&aliases);
return status;
}
diff --git a/nss/tst-nss-files-hosts-multi.c b/nss/tst-nss-files-hosts-multi.c
new file mode 100644
index 0000000..195a19b
--- /dev/null
+++ b/nss/tst-nss-files-hosts-multi.c
@@ -0,0 +1,331 @@
+/* Parse /etc/hosts in multi mode with many addresses/aliases.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <dlfcn.h>
+#include <errno.h>
+#include <gnu/lib-names.h>
+#include <netdb.h>
+#include <nss.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/check_nss.h>
+#include <support/namespace.h>
+#include <support/support.h>
+#include <support/test-driver.h>
+#include <support/test-driver.h>
+#include <support/xmemstream.h>
+#include <support/xstdio.h>
+#include <support/xunistd.h>
+#include <sys/resource.h>
+
+struct support_chroot *chroot_env;
+
+static void
+prepare (int argc, char **argv)
+{
+ chroot_env = support_chroot_create
+ ((struct support_chroot_configuration)
+ {
+ .resolv_conf = "",
+ .hosts = "", /* See write_hosts below. */
+ .host_conf = "multi on\n",
+ });
+}
+
+/* Create the /etc/hosts file from outside the chroot. */
+static void
+write_hosts (int count)
+{
+ TEST_VERIFY (count > 0 && count <= 65535);
+ FILE *fp = xfopen (chroot_env->path_hosts, "w");
+ fputs ("127.0.0.1 localhost localhost.localdomain\n"
+ "::1 localhost localhost.localdomain\n",
+ fp);
+ for (int i = 0; i < count; ++i)
+ {
+ fprintf (fp, "10.4.%d.%d www4.example.com\n",
+ (i / 256) & 0xff, i & 0xff);
+ fprintf (fp, "10.46.%d.%d www.example.com\n",
+ (i / 256) & 0xff, i & 0xff);
+ fprintf (fp, "192.0.2.1 alias.example.com v4-%d.example.com\n", i);
+ fprintf (fp, "2001:db8::6:%x www6.example.com\n", i);
+ fprintf (fp, "2001:db8::46:%x www.example.com\n", i);
+ fprintf (fp, "2001:db8::1 alias.example.com v6-%d.example.com\n", i);
+ }
+ xfclose (fp);
+}
+
+/* Parameters of a single test. */
+struct test_params
+{
+ const char *name; /* Name to query. */
+ const char *marker; /* Address marker for the name. */
+ int count; /* Number of addresses/aliases. */
+ int family; /* AF_INET, AF_INET_6 or AF_UNSPEC. */
+ bool canonname; /* True if AI_CANONNAME should be enabled. */
+};
+
+/* Expected result of gethostbyname/gethostbyname2. */
+static char *
+expected_ghbn (const struct test_params *params)
+{
+ TEST_VERIFY (params->family == AF_INET || params->family == AF_INET6);
+
+ struct xmemstream expected;
+ xopen_memstream (&expected);
+ if (strcmp (params->name, "alias.example.com") == 0)
+ {
+ fprintf (expected.out, "name: %s\n", params->name);
+ char af;
+ if (params->family == AF_INET)
+ af = '4';
+ else
+ af = '6';
+ for (int i = 0; i < params->count; ++i)
+ fprintf (expected.out, "alias: v%c-%d.example.com\n", af, i);
+
+ for (int i = 0; i < params->count; ++i)
+ if (params->family == AF_INET)
+ fputs ("address: 192.0.2.1\n", expected.out);
+ else
+ fputs ("address: 2001:db8::1\n", expected.out);
+ }
+ else /* www/www4/www6 name. */
+ {
+ bool do_ipv4 = params->family == AF_INET
+ && strncmp (params->name, "www6", 4) != 0;
+ bool do_ipv6 = params->family == AF_INET6
+ && strncmp (params->name, "www4", 4) != 0;
+ if (do_ipv4 || do_ipv6)
+ {
+ fprintf (expected.out, "name: %s\n", params->name);
+ if (do_ipv4)
+ for (int i = 0; i < params->count; ++i)
+ fprintf (expected.out, "address: 10.%s.%d.%d\n",
+ params->marker, i / 256, i % 256);
+ if (do_ipv6)
+ for (int i = 0; i < params->count; ++i)
+ fprintf (expected.out, "address: 2001:db8::%s:%x\n",
+ params->marker, i);
+ }
+ else
+ fputs ("error: HOST_NOT_FOUND\n", expected.out);
+ }
+ xfclose_memstream (&expected);
+ return expected.buffer;
+}
+
+/* Expected result of getaddrinfo. */
+static char *
+expected_gai (const struct test_params *params)
+{
+ bool do_ipv4 = false;
+ bool do_ipv6 = false;
+ if (params->family == AF_UNSPEC)
+ do_ipv4 = do_ipv6 = true;
+ else if (params->family == AF_INET)
+ do_ipv4 = true;
+ else if (params->family == AF_INET6)
+ do_ipv6 = true;
+
+ struct xmemstream expected;
+ xopen_memstream (&expected);
+ if (strcmp (params->name, "alias.example.com") == 0)
+ {
+ if (params->canonname)
+ fprintf (expected.out,
+ "flags: AI_CANONNAME\n"
+ "canonname: %s\n",
+ params->name);
+
+ if (do_ipv4)
+ for (int i = 0; i < params->count; ++i)
+ fputs ("address: STREAM/TCP 192.0.2.1 80\n", expected.out);
+ if (do_ipv6)
+ for (int i = 0; i < params->count; ++i)
+ fputs ("address: STREAM/TCP 2001:db8::1 80\n", expected.out);
+ }
+ else /* www/www4/www6 name. */
+ {
+ if (strncmp (params->name, "www4", 4) == 0)
+ do_ipv6 = false;
+ else if (strncmp (params->name, "www6", 4) == 0)
+ do_ipv4 = false;
+ /* Otherwise, we have www as the name, so we do both. */
+
+ if (do_ipv4 || do_ipv6)
+ {
+ if (params->canonname)
+ fprintf (expected.out,
+ "flags: AI_CANONNAME\n"
+ "canonname: %s\n",
+ params->name);
+
+ if (do_ipv4)
+ for (int i = 0; i < params->count; ++i)
+ fprintf (expected.out, "address: STREAM/TCP 10.%s.%d.%d 80\n",
+ params->marker, i / 256, i % 256);
+ if (do_ipv6)
+ for (int i = 0; i < params->count; ++i)
+ fprintf (expected.out,
+ "address: STREAM/TCP 2001:db8::%s:%x 80\n",
+ params->marker, i);
+ }
+ else
+ fputs ("error: Name or service not known\n", expected.out);
+ }
+ xfclose_memstream (&expected);
+ return expected.buffer;
+}
+
+static void
+run_gbhn_gai (struct test_params *params)
+{
+ char *ctx = xasprintf ("name=%s marker=%s count=%d family=%d",
+ params->name, params->marker, params->count,
+ params->family);
+ if (test_verbose > 0)
+ printf ("info: %s\n", ctx);
+
+ /* Check gethostbyname, gethostbyname2. */
+ if (params->family == AF_INET)
+ {
+ char *expected = expected_ghbn (params);
+ check_hostent (ctx, gethostbyname (params->name), expected);
+ free (expected);
+ }
+ if (params->family != AF_UNSPEC)
+ {
+ char *expected = expected_ghbn (params);
+ check_hostent (ctx, gethostbyname2 (params->name, params->family),
+ expected);
+ free (expected);
+ }
+
+ /* Check getaddrinfo. */
+ for (int do_canonical = 0; do_canonical < 2; ++do_canonical)
+ {
+ params->canonname = do_canonical;
+ char *expected = expected_gai (params);
+ struct addrinfo hints =
+ {
+ .ai_family = params->family,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ };
+ if (do_canonical)
+ hints.ai_flags |= AI_CANONNAME;
+ struct addrinfo *ai;
+ int ret = getaddrinfo (params->name, "80", &hints, &ai);
+ check_addrinfo (ctx, ai, ret, expected);
+ if (ret == 0)
+ freeaddrinfo (ai);
+ free (expected);
+ }
+
+ free (ctx);
+}
+
+/* Callback for the subprocess which runs the test in a chroot. */
+static void
+subprocess (void *closure)
+{
+ struct test_params *params = closure;
+
+ xchroot (chroot_env->path_chroot);
+
+ static const int families[] = { AF_INET, AF_INET6, AF_UNSPEC, -1 };
+ static const char *const names[] =
+ {
+ "www.example.com", "www4.example.com", "www6.example.com",
+ "alias.example.com",
+ NULL
+ };
+ static const char *const names_marker[] = { "46", "4", "6", "" };
+
+ for (int family_idx = 0; families[family_idx] >= 0; ++family_idx)
+ {
+ params->family = families[family_idx];
+ for (int names_idx = 0; names[names_idx] != NULL; ++names_idx)
+ {
+ params->name = names[names_idx];
+ params->marker = names_marker[names_idx];
+ run_gbhn_gai (params);
+ }
+ }
+}
+
+/* Run the test for a specific number of addresses/aliases. */
+static void
+run_test (int count)
+{
+ write_hosts (count);
+
+ struct test_params params =
+ {
+ .count = count,
+ };
+
+ support_isolate_in_subprocess (subprocess, ¶ms);
+}
+
+static int
+do_test (void)
+{
+ support_become_root ();
+ if (!support_can_chroot ())
+ return EXIT_UNSUPPORTED;
+
+ /* This test should not use gigabytes of memory. */
+ {
+ struct rlimit limit;
+ if (getrlimit (RLIMIT_AS, &limit) != 0)
+ {
+ printf ("getrlimit (RLIMIT_AS) failed: %m\n");
+ return 1;
+ }
+ long target = 200 * 1024 * 1024;
+ if (limit.rlim_cur == RLIM_INFINITY || limit.rlim_cur > target)
+ {
+ limit.rlim_cur = target;
+ if (setrlimit (RLIMIT_AS, &limit) != 0)
+ {
+ printf ("setrlimit (RLIMIT_AS) failed: %m\n");
+ return 1;
+ }
+ }
+ }
+
+ __nss_configure_lookup ("hosts", "files");
+ if (dlopen (LIBNSS_FILES_SO, RTLD_LAZY) == NULL)
+ FAIL_EXIT1 ("could not load " LIBNSS_DNS_SO ": %s", dlerror ());
+
+ /* Run the tests with a few different address/alias counts. */
+ for (int count = 1; count <= 111; ++count)
+ run_test (count);
+ run_test (1111);
+ run_test (22222);
+
+ support_chroot_free (chroot_env);
+ return 0;
+}
+
+#define PREPARE prepare
+#include <support/test-driver.c>
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=8f8022df0773f4867d91068dce71539a4d1574ca
commit 8f8022df0773f4867d91068dce71539a4d1574ca
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Oct 11 07:01:34 2017 +0200
nss_files: Use struct scratch_buffer for gethostbyname [BZ #18023]
(cherry picked from commit 78e806fd8cd8c918d3bbe1bcdf9091ab365e4a69)
diff --git a/ChangeLog b/ChangeLog
index 642f01f..fef9a01 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-10-11 Florian Weimer <fweimer@redhat.com>
+
+ [BZ #18023]
+ * nss/nss_files/files-hosts.c (gethostbyname3_multi): Use struct
+ scratch_buffer. Eliminate gotos.
+
2017-10-10 Florian Weimer <fweimer@redhat.com>
* nss/nss_files/files-hosts.c (gethostbyname3_multi): New
diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c
index 867c10c..763fa39 100644
--- a/nss/nss_files/files-hosts.c
+++ b/nss/nss_files/files-hosts.c
@@ -22,6 +22,7 @@
#include <arpa/nameser.h>
#include <netdb.h>
#include <resolv/resolv-internal.h>
+#include <scratch_buffer.h>
/* Get implementation for some internal functions. */
@@ -121,15 +122,12 @@ gethostbyname3_multi (FILE * stream, const char *name, int af,
int *errnop, int *herrnop, int flags)
{
/* We have to get all host entries from the file. */
- size_t tmp_buflen = MIN (buflen, 4096);
- char tmp_buffer_stack[tmp_buflen]
- __attribute__ ((__aligned__ (__alignof__ (struct hostent_data))));
- char *tmp_buffer = tmp_buffer_stack;
+ struct scratch_buffer tmp_buffer;
+ scratch_buffer_init (&tmp_buffer);
struct hostent tmp_result_buf;
int naddrs = 1;
int naliases = 0;
char *bufferend;
- bool tmp_buffer_malloced = false;
enum nss_status status;
while (result->h_aliases[naliases] != NULL)
@@ -137,181 +135,165 @@ gethostbyname3_multi (FILE * stream, const char *name, int af,
bufferend = (char *) &result->h_aliases[naliases + 1];
- again:
- while ((status = internal_getent (stream, &tmp_result_buf, tmp_buffer,
- tmp_buflen, errnop, herrnop, af,
- flags))
- == NSS_STATUS_SUCCESS)
+ while (true)
{
- int matches = 1;
- struct hostent *old_result = result;
- result = &tmp_result_buf;
- /* The following piece is a bit clumsy but we want to use the
- `LOOKUP_NAME_CASE' value. The optimizer should do its
- job. */
- do
+ status = internal_getent (stream, &tmp_result_buf, tmp_buffer.data,
+ tmp_buffer.length, errnop, herrnop, af,
+ flags);
+ /* Enlarge the buffer if necessary. */
+ if (status == NSS_STATUS_TRYAGAIN && *herrnop == NETDB_INTERNAL
+ && *errnop == ERANGE)
{
- LOOKUP_NAME_CASE (h_name, h_aliases)
- result = old_result;
+ if (!scratch_buffer_grow (&tmp_buffer))
+ {
+ *errnop = ENOMEM;
+ /* *herrnop and status already have the right value. */
+ break;
+ }
+ /* Loop around and retry with a larger buffer. */
}
- while ((matches = 0));
-
- if (matches)
+ else if (status == NSS_STATUS_SUCCESS)
{
- /* We could be very clever and try to recycle a few bytes
- in the buffer instead of generating new arrays. But
- we are not doing this here since it's more work than
- it's worth. Simply let the user provide a bit bigger
- buffer. */
- char **new_h_addr_list;
- char **new_h_aliases;
- int newaliases = 0;
- size_t newstrlen = 0;
- int cnt;
-
- /* Count the new aliases and the length of the strings. */
- while (tmp_result_buf.h_aliases[newaliases] != NULL)
+ /* A line was read. Check that it matches the search
+ criteria. */
+
+ int matches = 1;
+ struct hostent *old_result = result;
+ result = &tmp_result_buf;
+ /* The following piece is a bit clumsy but we want to use
+ the `LOOKUP_NAME_CASE' value. The optimizer should do
+ its job. */
+ do
{
- char *cp = tmp_result_buf.h_aliases[newaliases];
- ++newaliases;
- newstrlen += strlen (cp) + 1;
+ LOOKUP_NAME_CASE (h_name, h_aliases)
+ result = old_result;
}
- /* If the real name is different add it also to the
- aliases. This means that there is a duplication
- in the alias list but this is really the user's
- problem. */
- if (strcmp (old_result->h_name,
- tmp_result_buf.h_name) != 0)
+ while ((matches = 0));
+
+ if (matches)
{
- ++newaliases;
- newstrlen += strlen (tmp_result_buf.h_name) + 1;
- }
+ /* We could be very clever and try to recycle a few bytes
+ in the buffer instead of generating new arrays. But
+ we are not doing this here since it's more work than
+ it's worth. Simply let the user provide a bit bigger
+ buffer. */
+ char **new_h_addr_list;
+ char **new_h_aliases;
+ int newaliases = 0;
+ size_t newstrlen = 0;
+ int cnt;
+
+ /* Count the new aliases and the length of the strings. */
+ while (tmp_result_buf.h_aliases[newaliases] != NULL)
+ {
+ char *cp = tmp_result_buf.h_aliases[newaliases];
+ ++newaliases;
+ newstrlen += strlen (cp) + 1;
+ }
+ /* If the real name is different add it also to the
+ aliases. This means that there is a duplication
+ in the alias list but this is really the user's
+ problem. */
+ if (strcmp (old_result->h_name,
+ tmp_result_buf.h_name) != 0)
+ {
+ ++newaliases;
+ newstrlen += strlen (tmp_result_buf.h_name) + 1;
+ }
- /* Make sure bufferend is aligned. */
- assert ((bufferend - (char *) 0) % sizeof (char *) == 0);
+ /* Make sure bufferend is aligned. */
+ assert ((bufferend - (char *) 0) % sizeof (char *) == 0);
- /* Now we can check whether the buffer is large enough.
- 16 is the maximal size of the IP address. */
- if (bufferend + 16 + (naddrs + 2) * sizeof (char *)
- + roundup (newstrlen, sizeof (char *))
- + (naliases + newaliases + 1) * sizeof (char *)
- >= buffer + buflen)
- {
- *errnop = ERANGE;
- *herrnop = NETDB_INTERNAL;
- status = NSS_STATUS_TRYAGAIN;
- goto out;
- }
+ /* Now we can check whether the buffer is large enough.
+ 16 is the maximal size of the IP address. */
+ if (bufferend + 16 + (naddrs + 2) * sizeof (char *)
+ + roundup (newstrlen, sizeof (char *))
+ + (naliases + newaliases + 1) * sizeof (char *)
+ >= buffer + buflen)
+ {
+ *errnop = ERANGE;
+ *herrnop = NETDB_INTERNAL;
+ status = NSS_STATUS_TRYAGAIN;
+ break;
+ }
- new_h_addr_list =
- (char **) (bufferend
- + roundup (newstrlen, sizeof (char *))
- + 16);
- new_h_aliases =
- (char **) ((char *) new_h_addr_list
- + (naddrs + 2) * sizeof (char *));
+ new_h_addr_list =
+ (char **) (bufferend
+ + roundup (newstrlen, sizeof (char *))
+ + 16);
+ new_h_aliases =
+ (char **) ((char *) new_h_addr_list
+ + (naddrs + 2) * sizeof (char *));
- /* Copy the old data in the new arrays. */
- for (cnt = 0; cnt < naddrs; ++cnt)
- new_h_addr_list[cnt] = old_result->h_addr_list[cnt];
+ /* Copy the old data in the new arrays. */
+ for (cnt = 0; cnt < naddrs; ++cnt)
+ new_h_addr_list[cnt] = old_result->h_addr_list[cnt];
- for (cnt = 0; cnt < naliases; ++cnt)
- new_h_aliases[cnt] = old_result->h_aliases[cnt];
+ for (cnt = 0; cnt < naliases; ++cnt)
+ new_h_aliases[cnt] = old_result->h_aliases[cnt];
- /* Store the new strings. */
- cnt = 0;
- while (tmp_result_buf.h_aliases[cnt] != NULL)
- {
- new_h_aliases[naliases++] = bufferend;
- bufferend = (__stpcpy (bufferend,
- tmp_result_buf.h_aliases[cnt])
- + 1);
- ++cnt;
- }
+ /* Store the new strings. */
+ cnt = 0;
+ while (tmp_result_buf.h_aliases[cnt] != NULL)
+ {
+ new_h_aliases[naliases++] = bufferend;
+ bufferend = (__stpcpy (bufferend,
+ tmp_result_buf.h_aliases[cnt])
+ + 1);
+ ++cnt;
+ }
- if (cnt < newaliases)
- {
- new_h_aliases[naliases++] = bufferend;
- bufferend = __stpcpy (bufferend,
- tmp_result_buf.h_name) + 1;
- }
+ if (cnt < newaliases)
+ {
+ new_h_aliases[naliases++] = bufferend;
+ bufferend = __stpcpy (bufferend,
+ tmp_result_buf.h_name) + 1;
+ }
- /* Final NULL pointer. */
- new_h_aliases[naliases] = NULL;
+ /* Final NULL pointer. */
+ new_h_aliases[naliases] = NULL;
- /* Round up the buffer end address. */
- bufferend += (sizeof (char *)
- - ((bufferend - (char *) 0)
- % sizeof (char *))) % sizeof (char *);
+ /* Round up the buffer end address. */
+ bufferend += (sizeof (char *)
+ - ((bufferend - (char *) 0)
+ % sizeof (char *))) % sizeof (char *);
- /* Now the new address. */
- new_h_addr_list[naddrs++] =
- memcpy (bufferend, tmp_result_buf.h_addr,
- tmp_result_buf.h_length);
+ /* Now the new address. */
+ new_h_addr_list[naddrs++] =
+ memcpy (bufferend, tmp_result_buf.h_addr,
+ tmp_result_buf.h_length);
- /* Also here a final NULL pointer. */
- new_h_addr_list[naddrs] = NULL;
+ /* Also here a final NULL pointer. */
+ new_h_addr_list[naddrs] = NULL;
- /* Store the new array pointers. */
- old_result->h_aliases = new_h_aliases;
- old_result->h_addr_list = new_h_addr_list;
+ /* Store the new array pointers. */
+ old_result->h_aliases = new_h_aliases;
+ old_result->h_addr_list = new_h_addr_list;
- /* Compute the new buffer end. */
- bufferend = (char *) &new_h_aliases[naliases + 1];
- assert (bufferend <= buffer + buflen);
+ /* Compute the new buffer end. */
+ bufferend = (char *) &new_h_aliases[naliases + 1];
+ assert (bufferend <= buffer + buflen);
- result = old_result;
- }
- }
+ result = old_result;
+ } /* If match was found. */
- if (status == NSS_STATUS_TRYAGAIN)
- {
- size_t newsize = 2 * tmp_buflen;
- if (tmp_buffer_malloced)
- {
- char *newp = realloc (tmp_buffer, newsize);
- if (newp != NULL)
- {
- assert ((((uintptr_t) newp)
- & (__alignof__ (struct hostent_data) - 1))
- == 0);
- tmp_buffer = newp;
- tmp_buflen = newsize;
- goto again;
- }
- }
- else if (!__libc_use_alloca (buflen + newsize))
- {
- tmp_buffer = malloc (newsize);
- if (tmp_buffer != NULL)
- {
- assert ((((uintptr_t) tmp_buffer)
- & (__alignof__ (struct hostent_data) - 1))
- == 0);
- tmp_buffer_malloced = true;
- tmp_buflen = newsize;
- goto again;
- }
- }
+ /* If no match is found, loop around and fetch another
+ line. */
+
+ } /* status == NSS_STATUS_SUCCESS. */
else
- {
- tmp_buffer
- = extend_alloca (tmp_buffer, tmp_buflen,
- newsize
- + __alignof__ (struct hostent_data));
- tmp_buffer = (char *) (((uintptr_t) tmp_buffer
- + __alignof__ (struct hostent_data)
- - 1)
- & ~(__alignof__ (struct hostent_data)
- - 1));
- goto again;
- }
- }
- else
+ /* internal_getent returned an error. */
+ break;
+ } /* while (true) */
+
+ /* Propagate the NSS_STATUS_TRYAGAIN error to the caller. It means
+ that we may not have loaded the complete result.
+ NSS_STATUS_NOTFOUND, however, means that we reached the end of
+ the file successfully. */
+ if (status != NSS_STATUS_TRYAGAIN)
status = NSS_STATUS_SUCCESS;
- out:
- if (tmp_buffer_malloced)
- free (tmp_buffer);
+
+ scratch_buffer_free (&tmp_buffer);
return status;
}
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=f67d3f0fa30d923c6e8631e85451da0fd94b86f3
commit f67d3f0fa30d923c6e8631e85451da0fd94b86f3
Author: Florian Weimer <fweimer@redhat.com>
Date: Tue Oct 10 11:50:41 2017 +0200
nss_files: Refactor gethostbyname3 multi case into separate function
This is in preparation of further cleanup work.
(cherry picked from commit 8ed70de2faceb4bd7b35bbdc2b7e8c83d9a297ba)
diff --git a/ChangeLog b/ChangeLog
index 513806b..642f01f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-10-10 Florian Weimer <fweimer@redhat.com>
+
+ * nss/nss_files/files-hosts.c (gethostbyname3_multi): New
+ function.
+ (_nss_files_gethostbyname3_r): Call it.
+
2017-04-21 Florian Weimer <fweimer@redhat.com>
* malloc/Makefile (tests-internal): Add tst-alloc_buffer.
diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c
index bccb6a5..867c10c 100644
--- a/nss/nss_files/files-hosts.c
+++ b/nss/nss_files/files-hosts.c
@@ -115,6 +115,206 @@ DB_LOOKUP (hostbyaddr, ,,,
}, const void *addr, socklen_t len, int af)
#undef EXTRA_ARGS_VALUE
+static enum nss_status
+gethostbyname3_multi (FILE * stream, const char *name, int af,
+ struct hostent *result, char *buffer, size_t buflen,
+ int *errnop, int *herrnop, int flags)
+{
+ /* We have to get all host entries from the file. */
+ size_t tmp_buflen = MIN (buflen, 4096);
+ char tmp_buffer_stack[tmp_buflen]
+ __attribute__ ((__aligned__ (__alignof__ (struct hostent_data))));
+ char *tmp_buffer = tmp_buffer_stack;
+ struct hostent tmp_result_buf;
+ int naddrs = 1;
+ int naliases = 0;
+ char *bufferend;
+ bool tmp_buffer_malloced = false;
+ enum nss_status status;
+
+ while (result->h_aliases[naliases] != NULL)
+ ++naliases;
+
+ bufferend = (char *) &result->h_aliases[naliases + 1];
+
+ again:
+ while ((status = internal_getent (stream, &tmp_result_buf, tmp_buffer,
+ tmp_buflen, errnop, herrnop, af,
+ flags))
+ == NSS_STATUS_SUCCESS)
+ {
+ int matches = 1;
+ struct hostent *old_result = result;
+ result = &tmp_result_buf;
+ /* The following piece is a bit clumsy but we want to use the
+ `LOOKUP_NAME_CASE' value. The optimizer should do its
+ job. */
+ do
+ {
+ LOOKUP_NAME_CASE (h_name, h_aliases)
+ result = old_result;
+ }
+ while ((matches = 0));
+
+ if (matches)
+ {
+ /* We could be very clever and try to recycle a few bytes
+ in the buffer instead of generating new arrays. But
+ we are not doing this here since it's more work than
+ it's worth. Simply let the user provide a bit bigger
+ buffer. */
+ char **new_h_addr_list;
+ char **new_h_aliases;
+ int newaliases = 0;
+ size_t newstrlen = 0;
+ int cnt;
+
+ /* Count the new aliases and the length of the strings. */
+ while (tmp_result_buf.h_aliases[newaliases] != NULL)
+ {
+ char *cp = tmp_result_buf.h_aliases[newaliases];
+ ++newaliases;
+ newstrlen += strlen (cp) + 1;
+ }
+ /* If the real name is different add it also to the
+ aliases. This means that there is a duplication
+ in the alias list but this is really the user's
+ problem. */
+ if (strcmp (old_result->h_name,
+ tmp_result_buf.h_name) != 0)
+ {
+ ++newaliases;
+ newstrlen += strlen (tmp_result_buf.h_name) + 1;
+ }
+
+ /* Make sure bufferend is aligned. */
+ assert ((bufferend - (char *) 0) % sizeof (char *) == 0);
+
+ /* Now we can check whether the buffer is large enough.
+ 16 is the maximal size of the IP address. */
+ if (bufferend + 16 + (naddrs + 2) * sizeof (char *)
+ + roundup (newstrlen, sizeof (char *))
+ + (naliases + newaliases + 1) * sizeof (char *)
+ >= buffer + buflen)
+ {
+ *errnop = ERANGE;
+ *herrnop = NETDB_INTERNAL;
+ status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ new_h_addr_list =
+ (char **) (bufferend
+ + roundup (newstrlen, sizeof (char *))
+ + 16);
+ new_h_aliases =
+ (char **) ((char *) new_h_addr_list
+ + (naddrs + 2) * sizeof (char *));
+
+ /* Copy the old data in the new arrays. */
+ for (cnt = 0; cnt < naddrs; ++cnt)
+ new_h_addr_list[cnt] = old_result->h_addr_list[cnt];
+
+ for (cnt = 0; cnt < naliases; ++cnt)
+ new_h_aliases[cnt] = old_result->h_aliases[cnt];
+
+ /* Store the new strings. */
+ cnt = 0;
+ while (tmp_result_buf.h_aliases[cnt] != NULL)
+ {
+ new_h_aliases[naliases++] = bufferend;
+ bufferend = (__stpcpy (bufferend,
+ tmp_result_buf.h_aliases[cnt])
+ + 1);
+ ++cnt;
+ }
+
+ if (cnt < newaliases)
+ {
+ new_h_aliases[naliases++] = bufferend;
+ bufferend = __stpcpy (bufferend,
+ tmp_result_buf.h_name) + 1;
+ }
+
+ /* Final NULL pointer. */
+ new_h_aliases[naliases] = NULL;
+
+ /* Round up the buffer end address. */
+ bufferend += (sizeof (char *)
+ - ((bufferend - (char *) 0)
+ % sizeof (char *))) % sizeof (char *);
+
+ /* Now the new address. */
+ new_h_addr_list[naddrs++] =
+ memcpy (bufferend, tmp_result_buf.h_addr,
+ tmp_result_buf.h_length);
+
+ /* Also here a final NULL pointer. */
+ new_h_addr_list[naddrs] = NULL;
+
+ /* Store the new array pointers. */
+ old_result->h_aliases = new_h_aliases;
+ old_result->h_addr_list = new_h_addr_list;
+
+ /* Compute the new buffer end. */
+ bufferend = (char *) &new_h_aliases[naliases + 1];
+ assert (bufferend <= buffer + buflen);
+
+ result = old_result;
+ }
+ }
+
+ if (status == NSS_STATUS_TRYAGAIN)
+ {
+ size_t newsize = 2 * tmp_buflen;
+ if (tmp_buffer_malloced)
+ {
+ char *newp = realloc (tmp_buffer, newsize);
+ if (newp != NULL)
+ {
+ assert ((((uintptr_t) newp)
+ & (__alignof__ (struct hostent_data) - 1))
+ == 0);
+ tmp_buffer = newp;
+ tmp_buflen = newsize;
+ goto again;
+ }
+ }
+ else if (!__libc_use_alloca (buflen + newsize))
+ {
+ tmp_buffer = malloc (newsize);
+ if (tmp_buffer != NULL)
+ {
+ assert ((((uintptr_t) tmp_buffer)
+ & (__alignof__ (struct hostent_data) - 1))
+ == 0);
+ tmp_buffer_malloced = true;
+ tmp_buflen = newsize;
+ goto again;
+ }
+ }
+ else
+ {
+ tmp_buffer
+ = extend_alloca (tmp_buffer, tmp_buflen,
+ newsize
+ + __alignof__ (struct hostent_data));
+ tmp_buffer = (char *) (((uintptr_t) tmp_buffer
+ + __alignof__ (struct hostent_data)
+ - 1)
+ & ~(__alignof__ (struct hostent_data)
+ - 1));
+ goto again;
+ }
+ }
+ else
+ status = NSS_STATUS_SUCCESS;
+ out:
+ if (tmp_buffer_malloced)
+ free (tmp_buffer);
+ return status;
+}
+
enum nss_status
_nss_files_gethostbyname3_r (const char *name, int af, struct hostent *result,
char *buffer, size_t buflen, int *errnop,
@@ -143,199 +343,8 @@ _nss_files_gethostbyname3_r (const char *name, int af, struct hostent *result,
if (status == NSS_STATUS_SUCCESS
&& _res_hconf.flags & HCONF_FLAG_MULTI)
- {
- /* We have to get all host entries from the file. */
- size_t tmp_buflen = MIN (buflen, 4096);
- char tmp_buffer_stack[tmp_buflen]
- __attribute__ ((__aligned__ (__alignof__ (struct hostent_data))));
- char *tmp_buffer = tmp_buffer_stack;
- struct hostent tmp_result_buf;
- int naddrs = 1;
- int naliases = 0;
- char *bufferend;
- bool tmp_buffer_malloced = false;
-
- while (result->h_aliases[naliases] != NULL)
- ++naliases;
-
- bufferend = (char *) &result->h_aliases[naliases + 1];
-
- again:
- while ((status = internal_getent (stream, &tmp_result_buf, tmp_buffer,
- tmp_buflen, errnop, herrnop, af,
- flags))
- == NSS_STATUS_SUCCESS)
- {
- int matches = 1;
- struct hostent *old_result = result;
- result = &tmp_result_buf;
- /* The following piece is a bit clumsy but we want to use the
- `LOOKUP_NAME_CASE' value. The optimizer should do its
- job. */
- do
- {
- LOOKUP_NAME_CASE (h_name, h_aliases)
- result = old_result;
- }
- while ((matches = 0));
-
- if (matches)
- {
- /* We could be very clever and try to recycle a few bytes
- in the buffer instead of generating new arrays. But
- we are not doing this here since it's more work than
- it's worth. Simply let the user provide a bit bigger
- buffer. */
- char **new_h_addr_list;
- char **new_h_aliases;
- int newaliases = 0;
- size_t newstrlen = 0;
- int cnt;
-
- /* Count the new aliases and the length of the strings. */
- while (tmp_result_buf.h_aliases[newaliases] != NULL)
- {
- char *cp = tmp_result_buf.h_aliases[newaliases];
- ++newaliases;
- newstrlen += strlen (cp) + 1;
- }
- /* If the real name is different add it also to the
- aliases. This means that there is a duplication
- in the alias list but this is really the user's
- problem. */
- if (strcmp (old_result->h_name,
- tmp_result_buf.h_name) != 0)
- {
- ++newaliases;
- newstrlen += strlen (tmp_result_buf.h_name) + 1;
- }
-
- /* Make sure bufferend is aligned. */
- assert ((bufferend - (char *) 0) % sizeof (char *) == 0);
-
- /* Now we can check whether the buffer is large enough.
- 16 is the maximal size of the IP address. */
- if (bufferend + 16 + (naddrs + 2) * sizeof (char *)
- + roundup (newstrlen, sizeof (char *))
- + (naliases + newaliases + 1) * sizeof (char *)
- >= buffer + buflen)
- {
- *errnop = ERANGE;
- *herrnop = NETDB_INTERNAL;
- status = NSS_STATUS_TRYAGAIN;
- goto out;
- }
-
- new_h_addr_list =
- (char **) (bufferend
- + roundup (newstrlen, sizeof (char *))
- + 16);
- new_h_aliases =
- (char **) ((char *) new_h_addr_list
- + (naddrs + 2) * sizeof (char *));
-
- /* Copy the old data in the new arrays. */
- for (cnt = 0; cnt < naddrs; ++cnt)
- new_h_addr_list[cnt] = old_result->h_addr_list[cnt];
-
- for (cnt = 0; cnt < naliases; ++cnt)
- new_h_aliases[cnt] = old_result->h_aliases[cnt];
-
- /* Store the new strings. */
- cnt = 0;
- while (tmp_result_buf.h_aliases[cnt] != NULL)
- {
- new_h_aliases[naliases++] = bufferend;
- bufferend = (__stpcpy (bufferend,
- tmp_result_buf.h_aliases[cnt])
- + 1);
- ++cnt;
- }
-
- if (cnt < newaliases)
- {
- new_h_aliases[naliases++] = bufferend;
- bufferend = __stpcpy (bufferend,
- tmp_result_buf.h_name) + 1;
- }
-
- /* Final NULL pointer. */
- new_h_aliases[naliases] = NULL;
-
- /* Round up the buffer end address. */
- bufferend += (sizeof (char *)
- - ((bufferend - (char *) 0)
- % sizeof (char *))) % sizeof (char *);
-
- /* Now the new address. */
- new_h_addr_list[naddrs++] =
- memcpy (bufferend, tmp_result_buf.h_addr,
- tmp_result_buf.h_length);
-
- /* Also here a final NULL pointer. */
- new_h_addr_list[naddrs] = NULL;
-
- /* Store the new array pointers. */
- old_result->h_aliases = new_h_aliases;
- old_result->h_addr_list = new_h_addr_list;
-
- /* Compute the new buffer end. */
- bufferend = (char *) &new_h_aliases[naliases + 1];
- assert (bufferend <= buffer + buflen);
-
- result = old_result;
- }
- }
-
- if (status == NSS_STATUS_TRYAGAIN)
- {
- size_t newsize = 2 * tmp_buflen;
- if (tmp_buffer_malloced)
- {
- char *newp = realloc (tmp_buffer, newsize);
- if (newp != NULL)
- {
- assert ((((uintptr_t) newp)
- & (__alignof__ (struct hostent_data) - 1))
- == 0);
- tmp_buffer = newp;
- tmp_buflen = newsize;
- goto again;
- }
- }
- else if (!__libc_use_alloca (buflen + newsize))
- {
- tmp_buffer = malloc (newsize);
- if (tmp_buffer != NULL)
- {
- assert ((((uintptr_t) tmp_buffer)
- & (__alignof__ (struct hostent_data) - 1))
- == 0);
- tmp_buffer_malloced = true;
- tmp_buflen = newsize;
- goto again;
- }
- }
- else
- {
- tmp_buffer
- = extend_alloca (tmp_buffer, tmp_buflen,
- newsize
- + __alignof__ (struct hostent_data));
- tmp_buffer = (char *) (((uintptr_t) tmp_buffer
- + __alignof__ (struct hostent_data)
- - 1)
- & ~(__alignof__ (struct hostent_data)
- - 1));
- goto again;
- }
- }
- else
- status = NSS_STATUS_SUCCESS;
- out:
- if (tmp_buffer_malloced)
- free (tmp_buffer);
- }
+ status = gethostbyname3_multi
+ (stream, name, af, result, buffer, buflen, errnop, herrnop, flags);
internal_endent (&stream);
}
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=e75e7573e1a44faaea833eb1f390def5d6ab672f
commit e75e7573e1a44faaea833eb1f390def5d6ab672f
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Jun 21 22:43:57 2017 +0200
Implement allocation buffers for internal use
This commit adds fixed-size allocation buffers. The primary use
case is in NSS modules, where dynamically sized data is stored
in a fixed-size buffer provided by the caller.
Other uses include a replacement of mempcpy cascades (which is
safer due to the size checking inherent to allocation buffers).
(cherry picked from commit 4dd8e7c0ce5ecc7f65e33e60ad2f717b31de32ec)
diff --git a/ChangeLog b/ChangeLog
index 0cc6ac6..513806b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2017-04-21 Florian Weimer <fweimer@redhat.com>
+
+ * malloc/Makefile (tests-internal): Add tst-alloc_buffer.
+ (routines): Add alloc_buffer_alloc_array, alloc_buffer_allocate,
+ alloc_buffer_copy_bytes, alloc_buffer_copy_string,
+ alloc_buffer_create_failure.
+ * malloc/Versions (__libc_alloc_buffer_alloc_array)
+ (__libc_alloc_buffer_allocate, __libc_alloc_buffer_copy_bytes)
+ (__libc_alloc_buffer_copy_string)
+ (__libc_alloc_buffer_create_failure): Export as GLIBC_PRIVATE.
+ * malloc/alloc_buffer_alloc_array.c: New file.
+ * malloc/alloc_buffer_allocate.c: Likewise.
+ * malloc/alloc_buffer_copy_bytes.c: Likewise.
+ * malloc/alloc_buffer_copy_string.c: Likewise.
+ * malloc/alloc_buffer_create_failure.c: Likewise.
+ * malloc/tst-alloc_buffer.c: Likewise.
+
2017-09-06 Florian Weimer <fweimer@redhat.com>
* malloc/dynarray_emplace_enlarge.c
diff --git a/include/alloc_buffer.h b/include/alloc_buffer.h
new file mode 100644
index 0000000..d668a60
--- /dev/null
+++ b/include/alloc_buffer.h
@@ -0,0 +1,367 @@
+/* Allocation from a fixed-size buffer.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Allocation buffers are used to carve out sub-allocations from a
+ larger allocation. Their primary application is in writing NSS
+ modules, which receive a caller-allocated buffer in which they are
+ expected to store variable-length results:
+
+ void *buffer = ...;
+ size_t buffer_size = ...;
+
+ struct alloc_buffer buf = alloc_buffer_create (buffer, buffer_size);
+ result->gr_name = alloc_buffer_copy_string (&buf, name);
+
+ // Allocate a list of group_count groups and copy strings into it.
+ char **group_list = alloc_buffer_alloc_array
+ (&buf, char *, group_count + 1);
+ if (group_list == NULL)
+ return ...; // Request a larger buffer.
+ for (int i = 0; i < group_count; ++i)
+ group_list[i] = alloc_buffer_copy_string (&buf, group_list_src[i]);
+ group_list[group_count] = NULL;
+ ...
+
+ if (alloc_buffer_has_failed (&buf))
+ return ...; // Request a larger buffer.
+ result->gr_mem = group_list;
+ ...
+
+ Note that it is not necessary to check the results of individual
+ allocation operations if the returned pointer is not dereferenced.
+ Allocation failure is sticky, so one check using
+ alloc_buffer_has_failed at the end covers all previous failures.
+
+ A different use case involves combining multiple heap allocations
+ into a single, large one. In the following example, an array of
+ doubles and an array of ints is allocated:
+
+ size_t double_array_size = ...;
+ size_t int_array_size = ...;
+
+ void *heap_ptr;
+ struct alloc_buffer buf = alloc_buffer_allocate
+ (double_array_size * sizeof (double) + int_array_size * sizeof (int),
+ &heap_ptr);
+ _Static_assert (__alignof__ (double) >= __alignof__ (int),
+ "no padding after double array");
+ double *double_array = alloc_buffer_alloc_array
+ (&buf, double, double_array_size);
+ int *int_array = alloc_buffer_alloc_array (&buf, int, int_array_size);
+ if (alloc_buffer_has_failed (&buf))
+ return ...; // Report error.
+ ...
+ free (heap_ptr);
+
+ The advantage over manual coding is that the computation of the
+ allocation size does not need an overflow check. In case of an
+ overflow, one of the subsequent allocations from the buffer will
+ fail. The initial size computation is checked for consistency at
+ run time, too. */
+
+#ifndef _ALLOC_BUFFER_H
+#define _ALLOC_BUFFER_H
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <sys/param.h>
+
+/* struct alloc_buffer objects refer to a region of bytes in memory of a
+ fixed size. The functions below can be used to allocate single
+ objects and arrays from this memory region, or write to its end.
+ On allocation failure (or if an attempt to write beyond the end of
+ the buffer with one of the copy functions), the buffer enters a
+ failed state.
+
+ struct alloc_buffer objects can be copied. The backing buffer will
+ be shared, but the current write position will be independent.
+
+ Conceptually, the memory region consists of a current write pointer
+ and a limit, beyond which the write pointer cannot move. */
+struct alloc_buffer
+{
+ /* uintptr_t is used here to simplify the alignment code, and to
+ avoid issues undefined subtractions if the buffer covers more
+ than half of the address space (which would result in differences
+ which could not be represented as a ptrdiff_t value). */
+ uintptr_t __alloc_buffer_current;
+ uintptr_t __alloc_buffer_end;
+};
+
+enum
+ {
+ /* The value for the __alloc_buffer_current member which marks the
+ buffer as invalid (together with a zero-length buffer). */
+ __ALLOC_BUFFER_INVALID_POINTER = 0,
+ };
+
+/* Internal function. Terminate the process using __libc_fatal. */
+void __libc_alloc_buffer_create_failure (void *start, size_t size);
+
+/* Create a new allocation buffer. The byte range from START to START
+ + SIZE - 1 must be valid, and the allocation buffer allocates
+ objects from that range. If START is NULL (so that SIZE must be
+ 0), the buffer is marked as failed immediately. */
+static inline struct alloc_buffer
+alloc_buffer_create (void *start, size_t size)
+{
+ uintptr_t current = (uintptr_t) start;
+ uintptr_t end = (uintptr_t) start + size;
+ if (end < current)
+ __libc_alloc_buffer_create_failure (start, size);
+ return (struct alloc_buffer) { current, end };
+}
+
+/* Internal function. See alloc_buffer_allocate below. */
+struct alloc_buffer __libc_alloc_buffer_allocate (size_t size, void **pptr)
+ __attribute__ ((nonnull (2)));
+
+/* Allocate a buffer of SIZE bytes using malloc. The returned buffer
+ is in a failed state if malloc fails. *PPTR points to the start of
+ the buffer and can be used to free it later, after the returned
+ buffer has been freed. */
+static __always_inline __attribute__ ((nonnull (2)))
+struct alloc_buffer alloc_buffer_allocate (size_t size, void **pptr)
+{
+ return __libc_alloc_buffer_allocate (size, pptr);
+}
+
+/* Mark the buffer as failed. */
+static inline void __attribute__ ((nonnull (1)))
+alloc_buffer_mark_failed (struct alloc_buffer *buf)
+{
+ buf->__alloc_buffer_current = __ALLOC_BUFFER_INVALID_POINTER;
+ buf->__alloc_buffer_end = __ALLOC_BUFFER_INVALID_POINTER;
+}
+
+/* Return the remaining number of bytes in the buffer. */
+static __always_inline __attribute__ ((nonnull (1))) size_t
+alloc_buffer_size (const struct alloc_buffer *buf)
+{
+ return buf->__alloc_buffer_end - buf->__alloc_buffer_current;
+}
+
+/* Return true if the buffer has been marked as failed. */
+static inline bool __attribute__ ((nonnull (1)))
+alloc_buffer_has_failed (const struct alloc_buffer *buf)
+{
+ return buf->__alloc_buffer_current == __ALLOC_BUFFER_INVALID_POINTER;
+}
+
+/* Add a single byte to the buffer (consuming the space for this
+ byte). Mark the buffer as failed if there is not enough room. */
+static inline void __attribute__ ((nonnull (1)))
+alloc_buffer_add_byte (struct alloc_buffer *buf, unsigned char b)
+{
+ if (__glibc_likely (buf->__alloc_buffer_current < buf->__alloc_buffer_end))
+ {
+ *(unsigned char *) buf->__alloc_buffer_current = b;
+ ++buf->__alloc_buffer_current;
+ }
+ else
+ alloc_buffer_mark_failed (buf);
+}
+
+/* Obtain a pointer to LENGTH bytes in BUF, and consume these bytes.
+ NULL is returned if there is not enough room, and the buffer is
+ marked as failed, or if the buffer has already failed.
+ (Zero-length allocations from an empty buffer which has not yet
+ failed succeed.) */
+static inline __attribute__ ((nonnull (1))) void *
+alloc_buffer_alloc_bytes (struct alloc_buffer *buf, size_t length)
+{
+ if (length <= alloc_buffer_size (buf))
+ {
+ void *result = (void *) buf->__alloc_buffer_current;
+ buf->__alloc_buffer_current += length;
+ return result;
+ }
+ else
+ {
+ alloc_buffer_mark_failed (buf);
+ return NULL;
+ }
+}
+
+/* Internal function. Statically assert that the type size is
+ constant and valid. */
+static __always_inline size_t
+__alloc_buffer_assert_size (size_t size)
+{
+ if (!__builtin_constant_p (size))
+ {
+ __errordecl (error, "type size is not constant");
+ error ();
+ }
+ else if (size == 0)
+ {
+ __errordecl (error, "type size is zero");
+ error ();
+ }
+ return size;
+}
+
+/* Internal function. Statically assert that the type alignment is
+ constant and valid. */
+static __always_inline size_t
+__alloc_buffer_assert_align (size_t align)
+{
+ if (!__builtin_constant_p (align))
+ {
+ __errordecl (error, "type alignment is not constant");
+ error ();
+ }
+ else if (align == 0)
+ {
+ __errordecl (error, "type alignment is zero");
+ error ();
+ }
+ else if (!powerof2 (align))
+ {
+ __errordecl (error, "type alignment is not a power of two");
+ error ();
+ }
+ return align;
+}
+
+/* Internal function. Obtain a pointer to an object. */
+static inline __attribute__ ((nonnull (1))) void *
+__alloc_buffer_alloc (struct alloc_buffer *buf, size_t size, size_t align)
+{
+ if (size == 1 && align == 1)
+ return alloc_buffer_alloc_bytes (buf, size);
+
+ size_t current = buf->__alloc_buffer_current;
+ size_t aligned = roundup (current, align);
+ size_t new_current = aligned + size;
+ if (aligned >= current /* No overflow in align step. */
+ && new_current >= size /* No overflow in size computation. */
+ && new_current <= buf->__alloc_buffer_end) /* Room in buffer. */
+ {
+ buf->__alloc_buffer_current = new_current;
+ return (void *) aligned;
+ }
+ else
+ {
+ alloc_buffer_mark_failed (buf);
+ return NULL;
+ }
+}
+
+/* Obtain a TYPE * pointer to an object in BUF of TYPE. Consume these
+ bytes from the buffer. Return NULL and mark the buffer as failed
+ if if there is not enough room in the buffer, or if the buffer has
+ failed before. */
+#define alloc_buffer_alloc(buf, type) \
+ ((type *) __alloc_buffer_alloc \
+ (buf, __alloc_buffer_assert_size (sizeof (type)), \
+ __alloc_buffer_assert_align (__alignof__ (type))))
+
+/* Internal function. Obtain a pointer to an object which is
+ subsequently added. */
+static inline const __attribute__ ((nonnull (1))) void *
+__alloc_buffer_next (struct alloc_buffer *buf, size_t align)
+{
+ if (align == 1)
+ return (const void *) buf->__alloc_buffer_current;
+
+ size_t current = buf->__alloc_buffer_current;
+ size_t aligned = roundup (current, align);
+ if (aligned >= current /* No overflow in align step. */
+ && aligned <= buf->__alloc_buffer_end) /* Room in buffer. */
+ {
+ buf->__alloc_buffer_current = aligned;
+ return (const void *) aligned;
+ }
+ else
+ {
+ alloc_buffer_mark_failed (buf);
+ return NULL;
+ }
+}
+
+/* Like alloc_buffer_alloc, but do not advance the pointer beyond the
+ object (so a subseqent call to alloc_buffer_next or
+ alloc_buffer_alloc returns the same pointer). Note that the buffer
+ is still aligned according to the requirements of TYPE. The effect
+ of this function is similar to allocating a zero-length array from
+ the buffer. */
+#define alloc_buffer_next(buf, type) \
+ ((const type *) __alloc_buffer_next \
+ (buf, __alloc_buffer_assert_align (__alignof__ (type))))
+
+/* Internal function. Allocate an array. */
+void * __libc_alloc_buffer_alloc_array (struct alloc_buffer *buf,
+ size_t size, size_t align,
+ size_t count)
+ __attribute__ ((nonnull (1)));
+
+/* Obtain a TYPE * pointer to an array of COUNT objects in BUF of
+ TYPE. Consume these bytes from the buffer. Return NULL and mark
+ the buffer as failed if if there is not enough room in the buffer,
+ or if the buffer has failed before. (Zero-length allocations from
+ an empty buffer which has not yet failed succeed.) */
+#define alloc_buffer_alloc_array(buf, type, count) \
+ ((type *) __libc_alloc_buffer_alloc_array \
+ (buf, __alloc_buffer_assert_size (sizeof (type)), \
+ __alloc_buffer_assert_align (__alignof__ (type)), \
+ count))
+
+/* Internal function. See alloc_buffer_copy_bytes below. */
+struct alloc_buffer __libc_alloc_buffer_copy_bytes (struct alloc_buffer,
+ const void *, size_t)
+ __attribute__ ((nonnull (2)));
+
+/* Copy SIZE bytes starting at SRC into the buffer. If there is not
+ enough room in the buffer, the buffer is marked as failed. No
+ alignment of the buffer is performed. */
+static inline __attribute__ ((nonnull (1, 2))) void
+alloc_buffer_copy_bytes (struct alloc_buffer *buf, const void *src, size_t size)
+{
+ *buf = __libc_alloc_buffer_copy_bytes (*buf, src, size);
+}
+
+/* Internal function. See alloc_buffer_copy_string below. */
+struct alloc_buffer __libc_alloc_buffer_copy_string (struct alloc_buffer,
+ const char *)
+ __attribute__ ((nonnull (2)));
+
+/* Copy the string at SRC into the buffer, including its null
+ terminator. If there is not enough room in the buffer, the buffer
+ is marked as failed. Return a pointer to the string. */
+static inline __attribute__ ((nonnull (1, 2))) char *
+alloc_buffer_copy_string (struct alloc_buffer *buf, const char *src)
+{
+ char *result = (char *) buf->__alloc_buffer_current;
+ *buf = __libc_alloc_buffer_copy_string (*buf, src);
+ if (alloc_buffer_has_failed (buf))
+ result = NULL;
+ return result;
+}
+
+#ifndef _ISOMAC
+libc_hidden_proto (__libc_alloc_buffer_alloc_array)
+libc_hidden_proto (__libc_alloc_buffer_allocate)
+libc_hidden_proto (__libc_alloc_buffer_copy_bytes)
+libc_hidden_proto (__libc_alloc_buffer_copy_string)
+libc_hidden_proto (__libc_alloc_buffer_create_failure)
+#endif
+
+#endif /* _ALLOC_BUFFER_H */
diff --git a/malloc/Makefile b/malloc/Makefile
index 0371d68..89fce91 100644
--- a/malloc/Makefile
+++ b/malloc/Makefile
@@ -36,6 +36,7 @@ tests := mallocbug tst-malloc tst-valloc tst-calloc tst-obstack \
tst-dynarray \
tst-dynarray-fail \
tst-dynarray-at-fail \
+ tst-alloc_buffer \
tests-static := \
tst-interpose-static-nothread \
@@ -58,6 +59,11 @@ routines = malloc morecore mcheck mtrace obstack \
dynarray_finalize \
dynarray_resize \
dynarray_resize_clear \
+ alloc_buffer_alloc_array \
+ alloc_buffer_allocate \
+ alloc_buffer_copy_bytes \
+ alloc_buffer_copy_string \
+ alloc_buffer_create_failure \
install-lib := libmcheck.a
non-lib.a := libmcheck.a
diff --git a/malloc/Versions b/malloc/Versions
index 16f9dab..0b7b690 100644
--- a/malloc/Versions
+++ b/malloc/Versions
@@ -79,5 +79,12 @@ libc {
__libc_dynarray_finalize;
__libc_dynarray_resize;
__libc_dynarray_resize_clear;
+
+ # struct alloc_buffer support
+ __libc_alloc_buffer_alloc_array;
+ __libc_alloc_buffer_allocate;
+ __libc_alloc_buffer_copy_bytes;
+ __libc_alloc_buffer_copy_string;
+ __libc_alloc_buffer_create_failure;
}
}
diff --git a/malloc/alloc_buffer_alloc_array.c b/malloc/alloc_buffer_alloc_array.c
new file mode 100644
index 0000000..68e14da
--- /dev/null
+++ b/malloc/alloc_buffer_alloc_array.c
@@ -0,0 +1,47 @@
+/* Array allocation from a fixed-size buffer.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <alloc_buffer.h>
+#include <malloc-internal.h>
+#include <libc-pointer-arith.h>
+
+void *
+__libc_alloc_buffer_alloc_array (struct alloc_buffer *buf, size_t element_size,
+ size_t align, size_t count)
+{
+ size_t current = buf->__alloc_buffer_current;
+ /* The caller asserts that align is a power of two. */
+ size_t aligned = ALIGN_UP (current, align);
+ size_t size;
+ bool overflow = check_mul_overflow_size_t (element_size, count, &size);
+ size_t new_current = aligned + size;
+ if (!overflow /* Multiplication did not overflow. */
+ && aligned >= current /* No overflow in align step. */
+ && new_current >= size /* No overflow in size computation. */
+ && new_current <= buf->__alloc_buffer_end) /* Room in buffer. */
+ {
+ buf->__alloc_buffer_current = new_current;
+ return (void *) aligned;
+ }
+ else
+ {
+ alloc_buffer_mark_failed (buf);
+ return NULL;
+ }
+}
+libc_hidden_def (__libc_alloc_buffer_alloc_array)
diff --git a/malloc/alloc_buffer_allocate.c b/malloc/alloc_buffer_allocate.c
new file mode 100644
index 0000000..cbde72b
--- /dev/null
+++ b/malloc/alloc_buffer_allocate.c
@@ -0,0 +1,36 @@
+/* Allocate a fixed-size allocation buffer using malloc.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <alloc_buffer.h>
+
+#include <stdlib.h>
+
+struct alloc_buffer
+__libc_alloc_buffer_allocate (size_t size, void **pptr)
+{
+ *pptr = malloc (size);
+ if (*pptr == NULL)
+ return (struct alloc_buffer)
+ {
+ .__alloc_buffer_current = __ALLOC_BUFFER_INVALID_POINTER,
+ .__alloc_buffer_end = __ALLOC_BUFFER_INVALID_POINTER
+ };
+ else
+ return alloc_buffer_create (*pptr, size);
+}
+libc_hidden_def (__libc_alloc_buffer_allocate)
diff --git a/malloc/alloc_buffer_copy_bytes.c b/malloc/alloc_buffer_copy_bytes.c
new file mode 100644
index 0000000..66196f1
--- /dev/null
+++ b/malloc/alloc_buffer_copy_bytes.c
@@ -0,0 +1,34 @@
+/* Copy an array of bytes into the buffer.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <alloc_buffer.h>
+
+#include <string.h>
+
+/* This function works on a copy of the buffer object, so that it can
+ remain non-addressable in the caller. */
+struct alloc_buffer
+__libc_alloc_buffer_copy_bytes (struct alloc_buffer buf,
+ const void *src, size_t len)
+{
+ void *ptr = alloc_buffer_alloc_bytes (&buf, len);
+ if (ptr != NULL)
+ memcpy (ptr, src, len);
+ return buf;
+}
+libc_hidden_def (__libc_alloc_buffer_copy_bytes)
diff --git a/malloc/alloc_buffer_copy_string.c b/malloc/alloc_buffer_copy_string.c
new file mode 100644
index 0000000..77c0023
--- /dev/null
+++ b/malloc/alloc_buffer_copy_string.c
@@ -0,0 +1,30 @@
+/* Copy a string into the allocation buffer.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <alloc_buffer.h>
+
+#include <string.h>
+
+/* This function works on a copy of the buffer object, so that it can
+ remain non-addressable in the caller. */
+struct alloc_buffer
+__libc_alloc_buffer_copy_string (struct alloc_buffer buf, const char *src)
+{
+ return __libc_alloc_buffer_copy_bytes (buf, src, strlen (src) + 1);
+}
+libc_hidden_def (__libc_alloc_buffer_copy_string)
diff --git a/malloc/alloc_buffer_create_failure.c b/malloc/alloc_buffer_create_failure.c
new file mode 100644
index 0000000..5ffba22
--- /dev/null
+++ b/malloc/alloc_buffer_create_failure.c
@@ -0,0 +1,31 @@
+/* Terminate the process as the result of an invalid allocation buffer.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <alloc_buffer.h>
+#include <stdio.h>
+
+void
+__libc_alloc_buffer_create_failure (void *start, size_t size)
+{
+ char buf[200];
+ __snprintf (buf, sizeof (buf), "Fatal glibc error: "
+ "invalid allocation buffer of size %zu\n",
+ size);
+ __libc_fatal (buf);
+}
+libc_hidden_def (__libc_alloc_buffer_create_failure)
diff --git a/malloc/tst-alloc_buffer.c b/malloc/tst-alloc_buffer.c
new file mode 100644
index 0000000..1c14399
--- /dev/null
+++ b/malloc/tst-alloc_buffer.c
@@ -0,0 +1,665 @@
+/* Tests for struct alloc_buffer.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <arpa/inet.h>
+#include <alloc_buffer.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/test-driver.h>
+
+/* Return true if PTR is sufficiently aligned for TYPE. */
+#define IS_ALIGNED(ptr, type) \
+ ((((uintptr_t) ptr) & (__alloc_buffer_assert_align (__alignof (type)) - 1)) \
+ == 0)
+
+/* Structure with non-power-of-two size. */
+struct twelve
+{
+ uint32_t buffer[3] __attribute__ ((aligned (4)));
+};
+_Static_assert (sizeof (struct twelve) == 12, "struct twelve");
+_Static_assert (__alignof__ (struct twelve) == 4, "struct twelve");
+
+/* Check for success obtaining empty arrays. Does not assume the
+ buffer is empty. */
+static void
+test_empty_array (struct alloc_buffer refbuf)
+{
+ bool refbuf_failed = alloc_buffer_has_failed (&refbuf);
+ if (test_verbose)
+ printf ("info: %s: current=0x%llx end=0x%llx refbuf_failed=%d\n",
+ __func__, (unsigned long long) refbuf.__alloc_buffer_current,
+ (unsigned long long) refbuf.__alloc_buffer_end, refbuf_failed);
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY ((alloc_buffer_alloc_bytes (&buf, 0) == NULL)
+ == refbuf_failed);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf) == refbuf_failed);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY ((alloc_buffer_alloc_array (&buf, char, 0) == NULL)
+ == refbuf_failed);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf) == refbuf_failed);
+ }
+ /* The following tests can fail due to the need for aligning the
+ returned pointer. */
+ {
+ struct alloc_buffer buf = refbuf;
+ bool expect_failure = refbuf_failed
+ || !IS_ALIGNED (alloc_buffer_next (&buf, void), double);
+ double *ptr = alloc_buffer_alloc_array (&buf, double, 0);
+ TEST_VERIFY (IS_ALIGNED (ptr, double));
+ TEST_VERIFY ((ptr == NULL) == expect_failure);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf) == expect_failure);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ bool expect_failure = refbuf_failed
+ || !IS_ALIGNED (alloc_buffer_next (&buf, void), struct twelve);
+ struct twelve *ptr = alloc_buffer_alloc_array (&buf, struct twelve, 0);
+ TEST_VERIFY (IS_ALIGNED (ptr, struct twelve));
+ TEST_VERIFY ((ptr == NULL) == expect_failure);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf) == expect_failure);
+ }
+}
+
+/* Test allocation of impossibly large arrays. */
+static void
+test_impossible_array (struct alloc_buffer refbuf)
+{
+ if (test_verbose)
+ printf ("info: %s: current=0x%llx end=0x%llx\n",
+ __func__, (unsigned long long) refbuf.__alloc_buffer_current,
+ (unsigned long long) refbuf.__alloc_buffer_end);
+ static const size_t counts[] =
+ { SIZE_MAX, SIZE_MAX - 1, SIZE_MAX - 2, SIZE_MAX - 3, SIZE_MAX - 4,
+ SIZE_MAX / 2, SIZE_MAX / 2 + 1, SIZE_MAX / 2 - 1, 0};
+
+ for (int i = 0; counts[i] != 0; ++i)
+ {
+ size_t count = counts[i];
+ if (test_verbose)
+ printf ("info: %s: count=%zu\n", __func__, count);
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_bytes (&buf, count) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, char, count) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, short, count) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, double, count) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, struct twelve, count)
+ == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ }
+}
+
+/* Check for failure to obtain anything from a failed buffer. */
+static void
+test_after_failure (struct alloc_buffer refbuf)
+{
+ if (test_verbose)
+ printf ("info: %s: current=0x%llx end=0x%llx\n",
+ __func__, (unsigned long long) refbuf.__alloc_buffer_current,
+ (unsigned long long) refbuf.__alloc_buffer_end);
+ TEST_VERIFY (alloc_buffer_has_failed (&refbuf));
+ {
+ struct alloc_buffer buf = refbuf;
+ alloc_buffer_add_byte (&buf, 17);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, char) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, double) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, struct twelve) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+
+ test_impossible_array (refbuf);
+ for (int count = 0; count <= 4; ++count)
+ {
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_bytes (&buf, count) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, char, count) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, double, count) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, struct twelve, count)
+ == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+ }
+}
+
+static void
+test_empty (struct alloc_buffer refbuf)
+{
+ TEST_VERIFY (alloc_buffer_size (&refbuf) == 0);
+ if (alloc_buffer_next (&refbuf, void) != NULL)
+ TEST_VERIFY (!alloc_buffer_has_failed (&refbuf));
+ test_empty_array (refbuf);
+ test_impossible_array (refbuf);
+
+ /* Failure to obtain non-empty objects. */
+ {
+ struct alloc_buffer buf = refbuf;
+ alloc_buffer_add_byte (&buf, 17);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, char) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, double) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, struct twelve) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, char, 1) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, double, 1) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, struct twelve, 1) == NULL);
+ test_after_failure (buf);
+ }
+}
+
+static void
+test_size_1 (struct alloc_buffer refbuf)
+{
+ TEST_VERIFY (!alloc_buffer_has_failed (&refbuf));
+ TEST_VERIFY (alloc_buffer_size (&refbuf) == 1);
+ test_empty_array (refbuf);
+ test_impossible_array (refbuf);
+
+ /* Success adding a single byte. */
+ {
+ struct alloc_buffer buf = refbuf;
+ alloc_buffer_add_byte (&buf, 17);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ test_empty (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "\x11", 1) == 0);
+ {
+ struct alloc_buffer buf = refbuf;
+ signed char *ptr = alloc_buffer_alloc (&buf, signed char);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ *ptr = 126;
+ test_empty (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "\176", 1) == 0);
+ {
+ struct alloc_buffer buf = refbuf;
+ char *ptr = alloc_buffer_alloc_array (&buf, char, 1);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ *ptr = (char) 253;
+ test_empty (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "\xfd", 1) == 0);
+
+ /* Failure with larger objects. */
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, short) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, double) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, struct twelve) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, short, 1) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, double, 1) == NULL);
+ test_after_failure (buf);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, struct twelve, 1) == NULL);
+ test_after_failure (buf);
+ }
+}
+
+static void
+test_size_2 (struct alloc_buffer refbuf)
+{
+ TEST_VERIFY (!alloc_buffer_has_failed (&refbuf));
+ TEST_VERIFY (alloc_buffer_size (&refbuf) == 2);
+ TEST_VERIFY (IS_ALIGNED (alloc_buffer_next (&refbuf, void), short));
+ test_empty_array (refbuf);
+ test_impossible_array (refbuf);
+
+ /* Success adding two bytes. */
+ {
+ struct alloc_buffer buf = refbuf;
+ alloc_buffer_add_byte (&buf, '@');
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ test_size_1 (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "@\xfd", 2) == 0);
+ {
+ struct alloc_buffer buf = refbuf;
+ signed char *ptr = alloc_buffer_alloc (&buf, signed char);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ *ptr = 'A';
+ test_size_1 (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "A\xfd", 2) == 0);
+ {
+ struct alloc_buffer buf = refbuf;
+ char *ptr = alloc_buffer_alloc_array (&buf, char, 1);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ *ptr = 'B';
+ test_size_1 (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "B\xfd", 2) == 0);
+ {
+ struct alloc_buffer buf = refbuf;
+ unsigned short *ptr = alloc_buffer_alloc (&buf, unsigned short);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (IS_ALIGNED (ptr, unsigned short));
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ *ptr = htons (0x12f4);
+ test_empty (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "\x12\xf4", 2) == 0);
+ {
+ struct alloc_buffer buf = refbuf;
+ unsigned short *ptr = alloc_buffer_alloc_array (&buf, unsigned short, 1);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (IS_ALIGNED (ptr, unsigned short));
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ *ptr = htons (0x13f5);
+ test_empty (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "\x13\xf5", 2) == 0);
+ {
+ struct alloc_buffer buf = refbuf;
+ char *ptr = alloc_buffer_alloc_array (&buf, char, 2);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ memcpy (ptr, "12", 2);
+ test_empty (buf);
+ }
+ TEST_VERIFY (memcmp (alloc_buffer_next (&refbuf, void), "12", 2) == 0);
+}
+
+static void
+test_misaligned (char pad)
+{
+ enum { SIZE = 23 };
+ char *backing = xmalloc (SIZE + 2);
+ backing[0] = ~pad;
+ backing[SIZE + 1] = pad;
+ struct alloc_buffer refbuf = alloc_buffer_create (backing + 1, SIZE);
+
+ {
+ struct alloc_buffer buf = refbuf;
+ short *ptr = alloc_buffer_alloc_array (&buf, short, SIZE / sizeof (short));
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (IS_ALIGNED (ptr, short));
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ for (int i = 0; i < SIZE / sizeof (short); ++i)
+ ptr[i] = htons (0xff01 + i);
+ TEST_VERIFY (memcmp (ptr,
+ "\xff\x01\xff\x02\xff\x03\xff\x04"
+ "\xff\x05\xff\x06\xff\x07\xff\x08"
+ "\xff\x09\xff\x0a\xff\x0b", 22) == 0);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ uint32_t *ptr = alloc_buffer_alloc_array
+ (&buf, uint32_t, SIZE / sizeof (uint32_t));
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (IS_ALIGNED (ptr, uint32_t));
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ for (int i = 0; i < SIZE / sizeof (uint32_t); ++i)
+ ptr[i] = htonl (0xf1e2d301 + i);
+ TEST_VERIFY (memcmp (ptr,
+ "\xf1\xe2\xd3\x01\xf1\xe2\xd3\x02"
+ "\xf1\xe2\xd3\x03\xf1\xe2\xd3\x04"
+ "\xf1\xe2\xd3\x05", 20) == 0);
+ }
+ {
+ struct alloc_buffer buf = refbuf;
+ struct twelve *ptr = alloc_buffer_alloc (&buf, struct twelve);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (IS_ALIGNED (ptr, struct twelve));
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ ptr->buffer[0] = htonl (0x11223344);
+ ptr->buffer[1] = htonl (0x55667788);
+ ptr->buffer[2] = htonl (0x99aabbcc);
+ TEST_VERIFY (memcmp (ptr,
+ "\x11\x22\x33\x44"
+ "\x55\x66\x77\x88"
+ "\x99\xaa\xbb\xcc", 12) == 0);
+ }
+ {
+ static const double nums[] = { 1, 2 };
+ struct alloc_buffer buf = refbuf;
+ double *ptr = alloc_buffer_alloc_array (&buf, double, 2);
+ TEST_VERIFY_EXIT (ptr != NULL);
+ TEST_VERIFY (IS_ALIGNED (ptr, double));
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ ptr[0] = nums[0];
+ ptr[1] = nums[1];
+ TEST_VERIFY (memcmp (ptr, nums, sizeof (nums)) == 0);
+ }
+
+ /* Verify that padding was not overwritten. */
+ TEST_VERIFY (backing[0] == ~pad);
+ TEST_VERIFY (backing[SIZE + 1] == pad);
+ free (backing);
+}
+
+/* Check that overflow during alignment is handled properly. */
+static void
+test_large_misaligned (void)
+{
+ uintptr_t minus1 = -1;
+ uintptr_t start = minus1 & ~0xfe;
+ struct alloc_buffer refbuf = alloc_buffer_create ((void *) start, 16);
+ TEST_VERIFY (!alloc_buffer_has_failed (&refbuf));
+
+ struct __attribute__ ((aligned (256))) align256
+ {
+ int dymmy;
+ };
+
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc (&buf, struct align256) == NULL);
+ test_after_failure (buf);
+ }
+ for (int count = 0; count < 3; ++count)
+ {
+ struct alloc_buffer buf = refbuf;
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, struct align256, count)
+ == NULL);
+ test_after_failure (buf);
+ }
+}
+
+/* Check behavior of large allocations. */
+static void
+test_large (void)
+{
+ {
+ /* Allocation which wraps around. */
+ struct alloc_buffer buf = { 1, SIZE_MAX };
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, char, SIZE_MAX) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+
+ {
+ /* Successful very large allocation. */
+ struct alloc_buffer buf = { 1, SIZE_MAX };
+ uintptr_t val = (uintptr_t) alloc_buffer_alloc_array
+ (&buf, char, SIZE_MAX - 1);
+ TEST_VERIFY (val == 1);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ test_empty (buf);
+ }
+
+ {
+ typedef char __attribute__ ((aligned (2))) char2;
+
+ /* Overflow in array size computation. */
+ struct alloc_buffer buf = { 1, SIZE_MAX };
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, char2, SIZE_MAX - 1) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+
+ /* Successful allocation after alignment. */
+ buf = (struct alloc_buffer) { 1, SIZE_MAX };
+ uintptr_t val = (uintptr_t) alloc_buffer_alloc_array
+ (&buf, char2, SIZE_MAX - 2);
+ TEST_VERIFY (val == 2);
+ test_empty (buf);
+
+ /* Alignment behavior near the top of the address space. */
+ buf = (struct alloc_buffer) { SIZE_MAX, SIZE_MAX };
+ TEST_VERIFY (alloc_buffer_next (&buf, char2) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ buf = (struct alloc_buffer) { SIZE_MAX, SIZE_MAX };
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, char2, 0) == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ }
+
+ {
+ typedef short __attribute__ ((aligned (2))) short2;
+
+ /* Test overflow in size computation. */
+ struct alloc_buffer buf = { 1, SIZE_MAX };
+ TEST_VERIFY (alloc_buffer_alloc_array (&buf, short2, SIZE_MAX / 2)
+ == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+
+ /* A slightly smaller array fits within the allocation. */
+ buf = (struct alloc_buffer) { 2, SIZE_MAX - 1 };
+ uintptr_t val = (uintptr_t) alloc_buffer_alloc_array
+ (&buf, short2, SIZE_MAX / 2 - 1);
+ TEST_VERIFY (val == 2);
+ test_empty (buf);
+ }
+}
+
+static void
+test_copy_bytes (void)
+{
+ char backing[4];
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ alloc_buffer_copy_bytes (&buf, "1", 1);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (alloc_buffer_size (&buf) == 3);
+ TEST_VERIFY (memcmp (backing, "1@@@", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ alloc_buffer_copy_bytes (&buf, "12", 3);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (alloc_buffer_size (&buf) == 1);
+ TEST_VERIFY (memcmp (backing, "12\0@", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ alloc_buffer_copy_bytes (&buf, "1234", 4);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (alloc_buffer_size (&buf) == 0);
+ TEST_VERIFY (memcmp (backing, "1234", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ alloc_buffer_copy_bytes (&buf, "1234", 5);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (memcmp (backing, "@@@@", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ alloc_buffer_copy_bytes (&buf, "1234", -1);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (memcmp (backing, "@@@@", 4) == 0);
+ }
+}
+
+static void
+test_copy_string (void)
+{
+ char backing[4];
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ const char *p = alloc_buffer_copy_string (&buf, "");
+ TEST_VERIFY (p == backing);
+ TEST_VERIFY (strcmp (p, "") == 0);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (alloc_buffer_size (&buf) == 3);
+ TEST_VERIFY (memcmp (backing, "\0@@@", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ const char *p = alloc_buffer_copy_string (&buf, "1");
+ TEST_VERIFY (p == backing);
+ TEST_VERIFY (strcmp (p, "1") == 0);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (alloc_buffer_size (&buf) == 2);
+ TEST_VERIFY (memcmp (backing, "1\0@@", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ const char *p = alloc_buffer_copy_string (&buf, "12");
+ TEST_VERIFY (p == backing);
+ TEST_VERIFY (strcmp (p, "12") == 0);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (alloc_buffer_size (&buf) == 1);
+ TEST_VERIFY (memcmp (backing, "12\0@", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ const char *p = alloc_buffer_copy_string (&buf, "123");
+ TEST_VERIFY (p == backing);
+ TEST_VERIFY (strcmp (p, "123") == 0);
+ TEST_VERIFY (!alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (alloc_buffer_size (&buf) == 0);
+ TEST_VERIFY (memcmp (backing, "123", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ TEST_VERIFY (alloc_buffer_copy_string (&buf, "1234") == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (memcmp (backing, "@@@@", 4) == 0);
+ }
+ {
+ memset (backing, '@', sizeof (backing));
+ struct alloc_buffer buf = alloc_buffer_create (backing, sizeof (backing));
+ TEST_VERIFY (alloc_buffer_copy_string (&buf, "12345") == NULL);
+ TEST_VERIFY (alloc_buffer_has_failed (&buf));
+ TEST_VERIFY (memcmp (backing, "@@@@", 4) == 0);
+ }
+}
+
+static int
+do_test (void)
+{
+ test_empty (alloc_buffer_create (NULL, 0));
+ test_empty (alloc_buffer_create ((char *) "", 0));
+ test_empty (alloc_buffer_create ((void *) 1, 0));
+
+ {
+ void *ptr = (void *) ""; /* Cannot be freed. */
+ struct alloc_buffer buf = alloc_buffer_allocate (1, &ptr);
+ test_size_1 (buf);
+ free (ptr); /* Should have been overwritten. */
+ }
+
+ {
+ void *ptr= (void *) ""; /* Cannot be freed. */
+ struct alloc_buffer buf = alloc_buffer_allocate (2, &ptr);
+ test_size_2 (buf);
+ free (ptr); /* Should have been overwritten. */
+ }
+
+ test_misaligned (0);
+ test_misaligned (0xc7);
+ test_misaligned (0xff);
+
+ test_large_misaligned ();
+ test_large ();
+ test_copy_bytes ();
+ test_copy_string ();
+
+ return 0;
+}
+
+#include <support/test-driver.c>
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=bf19b5fdcde6bae47a17e6173f57f0606a8bd0e9
commit bf19b5fdcde6bae47a17e6173f57f0606a8bd0e9
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Sep 6 11:25:14 2017 +0200
__libc_dynarray_emplace_enlarge: Add missing else
Before, arrays of small elements received a starting allocation size of
8, not 16.
(cherry picked from commit ab5ac271e6210fa0af11cf3ca525ce573bc47c48)
diff --git a/ChangeLog b/ChangeLog
index 66b74d4..0cc6ac6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-09-06 Florian Weimer <fweimer@redhat.com>
+
+ * malloc/dynarray_emplace_enlarge.c
+ (__libc_dynarray_emplace_enlarge): Add missing else.
+
2017-08-30 Florian Weimer <fweimer@redhat.com>
* malloc/dynarray_emplace_enlarge.c
diff --git a/malloc/dynarray_emplace_enlarge.c b/malloc/dynarray_emplace_enlarge.c
index 0fb0327..a15245f 100644
--- a/malloc/dynarray_emplace_enlarge.c
+++ b/malloc/dynarray_emplace_enlarge.c
@@ -33,7 +33,7 @@ __libc_dynarray_emplace_enlarge (struct dynarray_header *list,
size. */
if (element_size < 4)
new_allocated = 16;
- if (element_size < 8)
+ else if (element_size < 8)
new_allocated = 8;
else
new_allocated = 4;
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=9bb04ec133b30fd106782b2105b8edca93b052e6
commit 9bb04ec133b30fd106782b2105b8edca93b052e6
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Aug 30 20:10:56 2017 +0200
dynarray: Set errno on overflow-induced allocation failure
This allows the caller to return directly on such an error, with an
appropriate errno value.
(cherry picked from commit 5898f4548efdcd7c0fd437a74eeb80facc51a117)
diff --git a/ChangeLog b/ChangeLog
index 1cbf152..66b74d4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2017-08-30 Florian Weimer <fweimer@redhat.com>
+
+ * malloc/dynarray_emplace_enlarge.c
+ (__libc_dynarray_emplace_enlarge): Set errno on overflow.
+ * malloc/dynarray_resize.c (__libc_dynarray_resize): Likewise.
+ * malloc/tst-dynarray.c (test_long_overflow): New function.
+ (do_test): Call it.
+
2017-06-13 Florian Weimer <fweimer@redhat.com>
* malloc/dynarray-skeleton.c: List begin/end as defined functions.
diff --git a/malloc/dynarray_emplace_enlarge.c b/malloc/dynarray_emplace_enlarge.c
index dfc7001..0fb0327 100644
--- a/malloc/dynarray_emplace_enlarge.c
+++ b/malloc/dynarray_emplace_enlarge.c
@@ -17,6 +17,7 @@
<http://www.gnu.org/licenses/>. */
#include <dynarray.h>
+#include <errno.h>
#include <malloc-internal.h>
#include <stdlib.h>
#include <string.h>
@@ -43,8 +44,11 @@ __libc_dynarray_emplace_enlarge (struct dynarray_header *list,
{
new_allocated = list->allocated + list->allocated / 2 + 1;
if (new_allocated <= list->allocated)
- /* Overflow. */
- return false;
+ {
+ /* Overflow. */
+ __set_errno (ENOMEM);
+ return false;
+ }
}
size_t new_size;
diff --git a/malloc/dynarray_resize.c b/malloc/dynarray_resize.c
index e6dc9fb..63c981b 100644
--- a/malloc/dynarray_resize.c
+++ b/malloc/dynarray_resize.c
@@ -17,6 +17,7 @@
<http://www.gnu.org/licenses/>. */
#include <dynarray.h>
+#include <errno.h>
#include <malloc-internal.h>
#include <stdlib.h>
#include <string.h>
@@ -38,7 +39,11 @@ __libc_dynarray_resize (struct dynarray_header *list, size_t size,
size_t new_size_bytes;
if (check_mul_overflow_size_t (size, element_size, &new_size_bytes))
- return false;
+ {
+ /* Overflow. */
+ __set_errno (ENOMEM);
+ return false;
+ }
void *new_array;
if (list->array == scratch)
{
diff --git a/malloc/tst-dynarray.c b/malloc/tst-dynarray.c
index 2206d75..d11f7bb 100644
--- a/malloc/tst-dynarray.c
+++ b/malloc/tst-dynarray.c
@@ -18,6 +18,9 @@
#include "tst-dynarray-shared.h"
+#include <errno.h>
+#include <stdint.h>
+
#define DYNARRAY_STRUCT dynarray_long
#define DYNARRAY_ELEMENT long
#define DYNARRAY_PREFIX dynarray_long_
@@ -463,6 +466,31 @@ test_long_init (void)
}
}
+/* Test overflow in resize. */
+static void
+test_long_overflow (void)
+{
+ {
+ struct dynarray_long dyn;
+ dynarray_long_init (&dyn);
+ errno = EINVAL;
+ TEST_VERIFY (!dynarray_long_resize
+ (&dyn, (SIZE_MAX / sizeof (long)) + 1));
+ TEST_VERIFY (errno == ENOMEM);
+ TEST_VERIFY (dynarray_long_has_failed (&dyn));
+ }
+
+ {
+ struct dynarray_long_noscratch dyn;
+ dynarray_long_noscratch_init (&dyn);
+ errno = EINVAL;
+ TEST_VERIFY (!dynarray_long_noscratch_resize
+ (&dyn, (SIZE_MAX / sizeof (long)) + 1));
+ TEST_VERIFY (errno == ENOMEM);
+ TEST_VERIFY (dynarray_long_noscratch_has_failed (&dyn));
+ }
+}
+
/* Test NUL-terminated string construction with the add function and
the simple finalize function. */
static void
@@ -538,6 +566,7 @@ do_test (void)
test_int ();
test_str ();
test_long_init ();
+ test_long_overflow ();
test_zstr ();
return 0;
}
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=c3fe737243b7661d8aca2d9f5d76e966f5c537df
commit c3fe737243b7661d8aca2d9f5d76e966f5c537df
Author: Florian Weimer <fweimer@redhat.com>
Date: Tue Jun 13 17:03:56 2017 +0200
dynarray: Implement begin/end functions in the spirit of C++
(cherry picked from commit f8bf87face3304f216bcd838081fa33bb4976ac6)
diff --git a/ChangeLog b/ChangeLog
index 5ef1fa3..1cbf152 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2017-06-13 Florian Weimer <fweimer@redhat.com>
+
+ * malloc/dynarray-skeleton.c: List begin/end as defined functions.
+ (DYNARRAY_PREFIX##begin, DYNARRAY_PREFIX##end): New functions.
+ * malloc/tst-dynarray-shared.h (CHECK_EMPTY): Add tests for
+ begin/end.
+ * malloc/tst-dynarray.c (test_int): Test dynarray_int_begin,
+ dynarray_int_end.
+ (test_str): Test dynarray_str_begin, dynarray_str_end.
+
2017-06-02 Florian Weimer <fweimer@redhat.com>
* malloc/Makefile (routines): Add dynarray_at_failure,
diff --git a/malloc/dynarray-skeleton.c b/malloc/dynarray-skeleton.c
index 7a10e08..7ec5878 100644
--- a/malloc/dynarray-skeleton.c
+++ b/malloc/dynarray-skeleton.c
@@ -65,6 +65,8 @@
bool DYNARRAY_PREFIX##has_failed (const struct DYNARRAY_STRUCT *);
void DYNARRAY_PREFIX##mark_failed (struct DYNARRAY_STRUCT *);
size_t DYNARRAY_PREFIX##size (const struct DYNARRAY_STRUCT *);
+ DYNARRAY_ELEMENT *DYNARRAY_PREFIX##begin (const struct DYNARRAY_STRUCT *);
+ DYNARRAY_ELEMENT *DYNARRAY_PREFIX##end (const struct DYNARRAY_STRUCT *);
DYNARRAY_ELEMENT *DYNARRAY_PREFIX##at (struct DYNARRAY_STRUCT *, size_t);
void DYNARRAY_PREFIX##add (struct DYNARRAY_STRUCT *, DYNARRAY_ELEMENT);
DYNARRAY_ELEMENT *DYNARRAY_PREFIX##emplace (struct DYNARRAY_STRUCT *);
@@ -248,6 +250,26 @@ DYNARRAY_NAME (at) (struct DYNARRAY_STRUCT *list, size_t index)
return list->dynarray_header.array + index;
}
+/* Return a pointer to the first array element, if any. For a
+ zero-length array, the pointer can be NULL even though the dynamic
+ array has not entered the failure state. */
+__attribute__ ((nonnull (1)))
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (begin) (struct DYNARRAY_STRUCT *list)
+{
+ return list->dynarray_header.array;
+}
+
+/* Return a pointer one element past the last array element. For a
+ zero-length array, the pointer can be NULL even though the dynamic
+ array has not entered the failure state. */
+__attribute__ ((nonnull (1)))
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (end) (struct DYNARRAY_STRUCT *list)
+{
+ return list->dynarray_header.array + list->dynarray_header.used;
+}
+
/* Internal function. Slow path for the add function below. */
static void
DYNARRAY_NAME (add__) (struct DYNARRAY_STRUCT *list, DYNARRAY_ELEMENT item)
diff --git a/malloc/tst-dynarray-shared.h b/malloc/tst-dynarray-shared.h
index faba66f..1de9c04 100644
--- a/malloc/tst-dynarray-shared.h
+++ b/malloc/tst-dynarray-shared.h
@@ -73,5 +73,8 @@ struct str_array
TEST_VERIFY_EXIT (dynarray_##type##_emplace (dyn) == NULL); \
dynarray_##type##_free (dyn); \
CHECK_INIT_STATE (type, (dyn)); \
+ /* These functions should not assert. */ \
+ dynarray_##type##_begin (dyn); \
+ dynarray_##type##_end (dyn); \
(void) 0; \
})
diff --git a/malloc/tst-dynarray.c b/malloc/tst-dynarray.c
index 7aee85a..2206d75 100644
--- a/malloc/tst-dynarray.c
+++ b/malloc/tst-dynarray.c
@@ -111,6 +111,13 @@ test_int (void)
}
TEST_VERIFY_EXIT (dynarray_int_size (&dyn) == count);
TEST_VERIFY_EXIT (count <= dyn.dynarray_header.allocated);
+ if (count > 0)
+ {
+ TEST_VERIFY (dynarray_int_begin (&dyn)
+ == dynarray_int_at (&dyn, 0));
+ TEST_VERIFY (dynarray_int_end (&dyn)
+ == dynarray_int_at (&dyn, count - 1) + 1);
+ }
unsigned final_count;
bool heap_array = dyn.dynarray_header.array != dyn.scratch;
if (do_remove_last)
@@ -123,6 +130,13 @@ test_int (void)
}
else
final_count = count;
+ if (final_count > 0)
+ {
+ TEST_VERIFY (dynarray_int_begin (&dyn)
+ == dynarray_int_at (&dyn, 0));
+ TEST_VERIFY (dynarray_int_end (&dyn)
+ == dynarray_int_at (&dyn, final_count - 1) + 1);
+ }
if (do_clear)
{
dynarray_int_clear (&dyn);
@@ -225,6 +239,13 @@ test_str (void)
}
TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == count);
TEST_VERIFY_EXIT (count <= dyn.dynarray_header.allocated);
+ if (count > 0)
+ {
+ TEST_VERIFY (dynarray_str_begin (&dyn)
+ == dynarray_str_at (&dyn, 0));
+ TEST_VERIFY (dynarray_str_end (&dyn)
+ == dynarray_str_at (&dyn, count - 1) + 1);
+ }
unsigned final_count;
bool heap_array = dyn.dynarray_header.array != dyn.scratch;
if (do_remove_last)
@@ -237,6 +258,13 @@ test_str (void)
}
else
final_count = count;
+ if (final_count > 0)
+ {
+ TEST_VERIFY (dynarray_str_begin (&dyn)
+ == dynarray_str_at (&dyn, 0));
+ TEST_VERIFY (dynarray_str_end (&dyn)
+ == dynarray_str_at (&dyn, final_count - 1) + 1);
+ }
if (do_clear)
{
dynarray_str_clear (&dyn);
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=8871213e335854fbe1ae15a3c4b8ba2b7720cf1d
commit 8871213e335854fbe1ae15a3c4b8ba2b7720cf1d
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Jun 2 11:59:28 2017 +0200
Add internal facility for dynamic array handling
This is intended as a type-safe alternative to obstacks and
hand-written realloc constructs. The implementation avoids
writing function pointers to the heap.
(cherry picked from commit 91b6eb1140eda6bab324821ee3785e5d0ca155b8)
diff --git a/ChangeLog b/ChangeLog
index fff166c..5ef1fa3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,40 @@
+2017-06-02 Florian Weimer <fweimer@redhat.com>
+
+ * malloc/Makefile (routines): Add dynarray_at_failure,
+ dynarray_emplace_enlarge, dynarray_finalize.
+ (tests-internal): Add tst-dynarray, tst-dynarray-fail,
+ tst-dynarray-at-fail.
+ (tests-srcs): Add tst-dynarray, tst-dynarray-fail.
+ (tests-special): Add tst-dynarray-mem.out,
+ tst-dynarray-mem-fail.out.
+ (tst-dynarray-ENV, tst-dynarray-fail-ENV): Set.
+ (tst-dynarray-mem.out, tst-dynarray-fail-mem.out): Generate using
+ mtrace.
+ * malloc/Versions (__libc_dynarray_at_failure)
+ (__libc_dynarray_emplace_enlarge, __libc_dynarray_finalize)
+ (__libc_dynarray_resize, __libc_dynarray_resize_clear): Export as
+ GLIBC_PRIVATE.
+ * malloc/dynarray.h: New file.
+ * malloc/dynarray-skeleton.c: Likewise.
+ * malloc/dynarray_at_failure.c: Likewise.
+ * malloc/dynarray_emplace_enlarge.c: Likewise.
+ * malloc/dynarray_finalize.c: Likewise.
+ * malloc/dynarray_resize.c: Likewise.
+ * malloc/dynarray_resize_clear.c: Likewise.
+ * malloc/tst-dynarray.c: Likewise.
+ * malloc/tst-dynarray-fail.c: Likewise.
+ * malloc/tst-dynarray-at-fail.c: Likewise.
+ * malloc/tst-dynarray-shared.h: Likewise.
+ * support/Makefile (libsupport-routines): Add
+ support_capture_subprocess, xdup2, xpipe.
+ (tests): Add tst-support_capture_subprocess.
+ * support/capture_subprocess.h: New file.
+ * support/support_capture_subprocess.c: Likewise.
+ * support/tst-support_capture_subprocess.c: Likewise.
+ * support/xdup2.c: Likewise.
+ * support/xpipe.c: Likewise.
+ * support/xunistd.h (xdup2, xpipe): Declare.
+
2018-01-04 Florian Weimer <fweimer@redhat.com>
* malloc/malloc-internal.h (check_mul_overflow_size_t): New.
diff --git a/malloc/Makefile b/malloc/Makefile
index e93b83b..0371d68 100644
--- a/malloc/Makefile
+++ b/malloc/Makefile
@@ -33,6 +33,9 @@ tests := mallocbug tst-malloc tst-valloc tst-calloc tst-obstack \
tst-mallocfork2 \
tst-interpose-nothread \
tst-interpose-thread \
+ tst-dynarray \
+ tst-dynarray-fail \
+ tst-dynarray-at-fail \
tests-static := \
tst-interpose-static-nothread \
@@ -45,11 +48,16 @@ tests-static += tst-malloc-usable-static-tunables
endif
tests += $(tests-static)
-test-srcs = tst-mtrace
+test-srcs = tst-mtrace tst-dynarray tst-dynarray-fail
routines = malloc morecore mcheck mtrace obstack \
scratch_buffer_grow scratch_buffer_grow_preserve \
- scratch_buffer_set_array_size
+ scratch_buffer_set_array_size \
+ dynarray_at_failure \
+ dynarray_emplace_enlarge \
+ dynarray_finalize \
+ dynarray_resize \
+ dynarray_resize_clear \
install-lib := libmcheck.a
non-lib.a := libmcheck.a
@@ -135,6 +143,8 @@ ifeq ($(run-built-tests),yes)
ifeq (yes,$(build-shared))
ifneq ($(PERL),no)
tests-special += $(objpfx)tst-mtrace.out
+tests-special += $(objpfx)tst-dynarray-mem.out
+tests-special += $(objpfx)tst-dynarray-fail-mem.out
endif
endif
endif
@@ -206,3 +216,13 @@ $(objpfx)tst-interpose-thread: \
$(objpfx)tst-interpose-static-nothread: $(objpfx)tst-interpose-aux-nothread.o
$(objpfx)tst-interpose-static-thread: \
$(objpfx)tst-interpose-aux-thread.o $(static-thread-library)
+
+tst-dynarray-ENV = MALLOC_TRACE=$(objpfx)tst-dynarray.mtrace
+$(objpfx)tst-dynarray-mem.out: $(objpfx)tst-dynarray.out
+ $(common-objpfx)malloc/mtrace $(objpfx)tst-dynarray.mtrace > $@; \
+ $(evaluate-test)
+
+tst-dynarray-fail-ENV = MALLOC_TRACE=$(objpfx)tst-dynarray-fail.mtrace
+$(objpfx)tst-dynarray-fail-mem.out: $(objpfx)tst-dynarray-fail.out
+ $(common-objpfx)malloc/mtrace $(objpfx)tst-dynarray-fail.mtrace > $@; \
+ $(evaluate-test)
diff --git a/malloc/Versions b/malloc/Versions
index f3c3d8a..16f9dab 100644
--- a/malloc/Versions
+++ b/malloc/Versions
@@ -72,5 +72,12 @@ libc {
__libc_scratch_buffer_grow;
__libc_scratch_buffer_grow_preserve;
__libc_scratch_buffer_set_array_size;
+
+ # dynarray support
+ __libc_dynarray_at_failure;
+ __libc_dynarray_emplace_enlarge;
+ __libc_dynarray_finalize;
+ __libc_dynarray_resize;
+ __libc_dynarray_resize_clear;
}
}
diff --git a/malloc/dynarray-skeleton.c b/malloc/dynarray-skeleton.c
new file mode 100644
index 0000000..7a10e08
--- /dev/null
+++ b/malloc/dynarray-skeleton.c
@@ -0,0 +1,499 @@
+/* Type-safe arrays which grow dynamically.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Pre-processor macros which act as parameters:
+
+ DYNARRAY_STRUCT
+ The struct tag of dynamic array to be defined.
+ DYNARRAY_ELEMENT
+ The type name of the element type. Elements are copied
+ as if by memcpy, and can change address as the dynamic
+ array grows.
+ DYNARRAY_PREFIX
+ The prefix of the functions which are defined.
+
+ The following parameters are optional:
+
+ DYNARRAY_ELEMENT_FREE
+ DYNARRAY_ELEMENT_FREE (E) is evaluated to deallocate the
+ contents of elements. E is of type DYNARRAY_ELEMENT *.
+ DYNARRAY_ELEMENT_INIT
+ DYNARRAY_ELEMENT_INIT (E) is evaluated to initialize a new
+ element. E is of type DYNARRAY_ELEMENT *.
+ If DYNARRAY_ELEMENT_FREE but not DYNARRAY_ELEMENT_INIT is
+ defined, new elements are automatically zero-initialized.
+ Otherwise, new elements have undefined contents.
+ DYNARRAY_INITIAL_SIZE
+ The size of the statically allocated array (default:
+ at least 2, more elements if they fit into 128 bytes).
+ Must be a preprocessor constant. If DYNARRAY_INITIAL_SIZE is 0,
+ there is no statically allocated array at, and all non-empty
+ arrays are heap-allocated.
+ DYNARRAY_FINAL_TYPE
+ The name of the type which holds the final array. If not
+ defined, is PREFIX##finalize not provided. DYNARRAY_FINAL_TYPE
+ must be a struct type, with members of type DYNARRAY_ELEMENT and
+ size_t at the start (in this order).
+
+ These macros are undefined after this header file has been
+ included.
+
+ The following types are provided (their members are private to the
+ dynarray implementation):
+
+ struct DYNARRAY_STRUCT
+
+ The following functions are provided:
+
+ void DYNARRAY_PREFIX##init (struct DYNARRAY_STRUCT *);
+ void DYNARRAY_PREFIX##free (struct DYNARRAY_STRUCT *);
+ bool DYNARRAY_PREFIX##has_failed (const struct DYNARRAY_STRUCT *);
+ void DYNARRAY_PREFIX##mark_failed (struct DYNARRAY_STRUCT *);
+ size_t DYNARRAY_PREFIX##size (const struct DYNARRAY_STRUCT *);
+ DYNARRAY_ELEMENT *DYNARRAY_PREFIX##at (struct DYNARRAY_STRUCT *, size_t);
+ void DYNARRAY_PREFIX##add (struct DYNARRAY_STRUCT *, DYNARRAY_ELEMENT);
+ DYNARRAY_ELEMENT *DYNARRAY_PREFIX##emplace (struct DYNARRAY_STRUCT *);
+ bool DYNARRAY_PREFIX##resize (struct DYNARRAY_STRUCT *, size_t);
+ void DYNARRAY_PREFIX##remove_last (struct DYNARRAY_STRUCT *);
+ void DYNARRAY_PREFIX##clear (struct DYNARRAY_STRUCT *);
+
+ The following functions are provided are provided if the
+ prerequisites are met:
+
+ bool DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *,
+ DYNARRAY_FINAL_TYPE *);
+ (if DYNARRAY_FINAL_TYPE is defined)
+ DYNARRAY_ELEMENT *DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *,
+ size_t *);
+ (if DYNARRAY_FINAL_TYPE is not defined)
+*/
+
+#include <malloc/dynarray.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef DYNARRAY_STRUCT
+# error "DYNARRAY_STRUCT must be defined"
+#endif
+
+#ifndef DYNARRAY_ELEMENT
+# error "DYNARRAY_ELEMENT must be defined"
+#endif
+
+#ifndef DYNARRAY_PREFIX
+# error "DYNARRAY_PREFIX must be defined"
+#endif
+
+#ifdef DYNARRAY_INITIAL_SIZE
+# if DYNARRAY_INITIAL_SIZE < 0
+# error "DYNARRAY_INITIAL_SIZE must be non-negative"
+# endif
+# if DYNARRAY_INITIAL_SIZE > 0
+# define DYNARRAY_HAVE_SCRATCH 1
+# else
+# define DYNARRAY_HAVE_SCRATCH 0
+# endif
+#else
+/* Provide a reasonable default which limits the size of
+ DYNARRAY_STRUCT. */
+# define DYNARRAY_INITIAL_SIZE \
+ (sizeof (DYNARRAY_ELEMENT) > 64 ? 2 : 128 / sizeof (DYNARRAY_ELEMENT))
+# define DYNARRAY_HAVE_SCRATCH 1
+#endif
+
+/* Public type definitions. */
+
+/* All fields of this struct are private to the implementation. */
+struct DYNARRAY_STRUCT
+{
+ union
+ {
+ struct dynarray_header dynarray_abstract;
+ struct
+ {
+ /* These fields must match struct dynarray_header. */
+ size_t used;
+ size_t allocated;
+ DYNARRAY_ELEMENT *array;
+ } dynarray_header;
+ };
+
+#if DYNARRAY_HAVE_SCRATCH
+ /* Initial inline allocation. */
+ DYNARRAY_ELEMENT scratch[DYNARRAY_INITIAL_SIZE];
+#endif
+};
+
+/* Internal use only: Helper macros. */
+
+/* Ensure macro-expansion of DYNARRAY_PREFIX. */
+#define DYNARRAY_CONCAT0(prefix, name) prefix##name
+#define DYNARRAY_CONCAT1(prefix, name) DYNARRAY_CONCAT0(prefix, name)
+#define DYNARRAY_NAME(name) DYNARRAY_CONCAT1(DYNARRAY_PREFIX, name)
+
+/* Address of the scratch buffer if any. */
+#if DYNARRAY_HAVE_SCRATCH
+# define DYNARRAY_SCRATCH(list) (list)->scratch
+#else
+# define DYNARRAY_SCRATCH(list) NULL
+#endif
+
+/* Internal use only: Helper functions. */
+
+/* Internal function. Call DYNARRAY_ELEMENT_FREE with the array
+ elements. Name mangling needed due to the DYNARRAY_ELEMENT_FREE
+ macro expansion. */
+static inline void
+DYNARRAY_NAME (free__elements__) (DYNARRAY_ELEMENT *__dynarray_array,
+ size_t __dynarray_used)
+{
+#ifdef DYNARRAY_ELEMENT_FREE
+ for (size_t __dynarray_i = 0; __dynarray_i < __dynarray_used; ++__dynarray_i)
+ DYNARRAY_ELEMENT_FREE (&__dynarray_array[__dynarray_i]);
+#endif /* DYNARRAY_ELEMENT_FREE */
+}
+
+/* Internal function. Free the non-scratch array allocation. */
+static inline void
+DYNARRAY_NAME (free__array__) (struct DYNARRAY_STRUCT *list)
+{
+#if DYNARRAY_HAVE_SCRATCH
+ if (list->dynarray_header.array != list->scratch)
+ free (list->dynarray_header.array);
+#else
+ free (list->dynarray_header.array);
+#endif
+}
+
+/* Public functions. */
+
+/* Initialize a dynamic array object. This must be called before any
+ use of the object. */
+__attribute__ ((nonnull (1)))
+static void
+DYNARRAY_NAME (init) (struct DYNARRAY_STRUCT *list)
+{
+ list->dynarray_header.used = 0;
+ list->dynarray_header.allocated = DYNARRAY_INITIAL_SIZE;
+ list->dynarray_header.array = DYNARRAY_SCRATCH (list);
+}
+
+/* Deallocate the dynamic array and its elements. */
+__attribute__ ((unused, nonnull (1)))
+static void
+DYNARRAY_NAME (free) (struct DYNARRAY_STRUCT *list)
+{
+ DYNARRAY_NAME (free__elements__)
+ (list->dynarray_header.array, list->dynarray_header.used);
+ DYNARRAY_NAME (free__array__) (list);
+ DYNARRAY_NAME (init) (list);
+}
+
+/* Return true if the dynamic array is in an error state. */
+__attribute__ ((nonnull (1)))
+static inline bool
+DYNARRAY_NAME (has_failed) (const struct DYNARRAY_STRUCT *list)
+{
+ return list->dynarray_header.allocated == __dynarray_error_marker ();
+}
+
+/* Mark the dynamic array as failed. All elements are deallocated as
+ a side effect. */
+__attribute__ ((nonnull (1)))
+static void
+DYNARRAY_NAME (mark_failed) (struct DYNARRAY_STRUCT *list)
+{
+ DYNARRAY_NAME (free__elements__)
+ (list->dynarray_header.array, list->dynarray_header.used);
+ DYNARRAY_NAME (free__array__) (list);
+ list->dynarray_header.array = DYNARRAY_SCRATCH (list);
+ list->dynarray_header.used = 0;
+ list->dynarray_header.allocated = __dynarray_error_marker ();
+}
+
+/* Return the number of elements which have been added to the dynamic
+ array. */
+__attribute__ ((nonnull (1)))
+static inline size_t
+DYNARRAY_NAME (size) (const struct DYNARRAY_STRUCT *list)
+{
+ return list->dynarray_header.used;
+}
+
+/* Return a pointer to the array element at INDEX. Terminate the
+ process if INDEX is out of bounds. */
+__attribute__ ((nonnull (1)))
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (at) (struct DYNARRAY_STRUCT *list, size_t index)
+{
+ if (__glibc_unlikely (index >= DYNARRAY_NAME (size) (list)))
+ __libc_dynarray_at_failure (DYNARRAY_NAME (size) (list), index);
+ return list->dynarray_header.array + index;
+}
+
+/* Internal function. Slow path for the add function below. */
+static void
+DYNARRAY_NAME (add__) (struct DYNARRAY_STRUCT *list, DYNARRAY_ELEMENT item)
+{
+ if (__glibc_unlikely
+ (!__libc_dynarray_emplace_enlarge (&list->dynarray_abstract,
+ DYNARRAY_SCRATCH (list),
+ sizeof (DYNARRAY_ELEMENT))))
+ {
+ DYNARRAY_NAME (mark_failed) (list);
+ return;
+ }
+
+ /* Copy the new element and increase the array length. */
+ list->dynarray_header.array[list->dynarray_header.used++] = item;
+}
+
+/* Add ITEM at the end of the array, enlarging it by one element.
+ Mark *LIST as failed if the dynamic array allocation size cannot be
+ increased. */
+__attribute__ ((unused, nonnull (1)))
+static inline void
+DYNARRAY_NAME (add) (struct DYNARRAY_STRUCT *list, DYNARRAY_ELEMENT item)
+{
+ /* Do nothing in case of previous error. */
+ if (DYNARRAY_NAME (has_failed) (list))
+ return;
+
+ /* Enlarge the array if necessary. */
+ if (__glibc_unlikely (list->dynarray_header.used
+ == list->dynarray_header.allocated))
+ {
+ DYNARRAY_NAME (add__) (list, item);
+ return;
+ }
+
+ /* Copy the new element and increase the array length. */
+ list->dynarray_header.array[list->dynarray_header.used++] = item;
+}
+
+/* Internal function. Building block for the emplace functions below.
+ Assumes space for one more element in *LIST. */
+static inline DYNARRAY_ELEMENT *
+DYNARRAY_NAME (emplace__tail__) (struct DYNARRAY_STRUCT *list)
+{
+ DYNARRAY_ELEMENT *result
+ = &list->dynarray_header.array[list->dynarray_header.used];
+ ++list->dynarray_header.used;
+#if defined (DYNARRAY_ELEMENT_INIT)
+ DYNARRAY_ELEMENT_INIT (result);
+#elif defined (DYNARRAY_ELEMENT_FREE)
+ memset (result, 0, sizeof (*result));
+#endif
+ return result;
+}
+
+/* Internal function. Slow path for the emplace function below. */
+static DYNARRAY_ELEMENT *
+DYNARRAY_NAME (emplace__) (struct DYNARRAY_STRUCT *list)
+{
+ if (__glibc_unlikely
+ (!__libc_dynarray_emplace_enlarge (&list->dynarray_abstract,
+ DYNARRAY_SCRATCH (list),
+ sizeof (DYNARRAY_ELEMENT))))
+ {
+ DYNARRAY_NAME (mark_failed) (list);
+ return NULL;
+ }
+ return DYNARRAY_NAME (emplace__tail__) (list);
+}
+
+/* Allocate a place for a new element in *LIST and return a pointer to
+ it. The pointer can be NULL if the dynamic array cannot be
+ enlarged due to a memory allocation failure. */
+__attribute__ ((unused, warn_unused_result, nonnull (1)))
+static
+/* Avoid inlining with the larger initialization code. */
+#if !(defined (DYNARRAY_ELEMENT_INIT) || defined (DYNARRAY_ELEMENT_FREE))
+inline
+#endif
+DYNARRAY_ELEMENT *
+DYNARRAY_NAME (emplace) (struct DYNARRAY_STRUCT *list)
+{
+ /* Do nothing in case of previous error. */
+ if (DYNARRAY_NAME (has_failed) (list))
+ return NULL;
+
+ /* Enlarge the array if necessary. */
+ if (__glibc_unlikely (list->dynarray_header.used
+ == list->dynarray_header.allocated))
+ return (DYNARRAY_NAME (emplace__) (list));
+ return DYNARRAY_NAME (emplace__tail__) (list);
+}
+
+/* Change the size of *LIST to SIZE. If SIZE is larger than the
+ existing size, new elements are added (which can be initialized).
+ Otherwise, the list is truncated, and elements are freed. Return
+ false on memory allocation failure (and mark *LIST as failed). */
+__attribute__ ((unused, nonnull (1)))
+static bool
+DYNARRAY_NAME (resize) (struct DYNARRAY_STRUCT *list, size_t size)
+{
+ if (size > list->dynarray_header.used)
+ {
+ bool ok;
+#if defined (DYNARRAY_ELEMENT_INIT)
+ /* The new elements have to be initialized. */
+ size_t old_size = list->dynarray_header.used;
+ ok = __libc_dynarray_resize (&list->dynarray_abstract,
+ size, DYNARRAY_SCRATCH (list),
+ sizeof (DYNARRAY_ELEMENT));
+ if (ok)
+ for (size_t i = old_size; i < size; ++i)
+ {
+ DYNARRAY_ELEMENT_INIT (&list->dynarray_header.array[i]);
+ }
+#elif defined (DYNARRAY_ELEMENT_FREE)
+ /* Zero initialization is needed so that the elements can be
+ safely freed. */
+ ok = __libc_dynarray_resize_clear
+ (&list->dynarray_abstract, size,
+ DYNARRAY_SCRATCH (list), sizeof (DYNARRAY_ELEMENT));
+#else
+ ok = __libc_dynarray_resize (&list->dynarray_abstract,
+ size, DYNARRAY_SCRATCH (list),
+ sizeof (DYNARRAY_ELEMENT));
+#endif
+ if (__glibc_unlikely (!ok))
+ DYNARRAY_NAME (mark_failed) (list);
+ return ok;
+ }
+ else
+ {
+ /* The list has shrunk in size. Free the removed elements. */
+ DYNARRAY_NAME (free__elements__)
+ (list->dynarray_header.array + size,
+ list->dynarray_header.used - size);
+ list->dynarray_header.used = size;
+ return true;
+ }
+}
+
+/* Remove the last element of LIST if it is present. */
+__attribute__ ((unused, nonnull (1)))
+static void
+DYNARRAY_NAME (remove_last) (struct DYNARRAY_STRUCT *list)
+{
+ /* used > 0 implies that the array is the non-failed state. */
+ if (list->dynarray_header.used > 0)
+ {
+ size_t new_length = list->dynarray_header.used - 1;
+#ifdef DYNARRAY_ELEMENT_FREE
+ DYNARRAY_ELEMENT_FREE (&list->dynarray_header.array[new_length]);
+#endif
+ list->dynarray_header.used = new_length;
+ }
+}
+
+/* Remove all elements from the list. The elements are freed, but the
+ list itself is not. */
+__attribute__ ((unused, nonnull (1)))
+static void
+DYNARRAY_NAME (clear) (struct DYNARRAY_STRUCT *list)
+{
+ /* free__elements__ does nothing if the list is in the failed
+ state. */
+ DYNARRAY_NAME (free__elements__)
+ (list->dynarray_header.array, list->dynarray_header.used);
+ list->dynarray_header.used = 0;
+}
+
+#ifdef DYNARRAY_FINAL_TYPE
+/* Transfer the dynamic array to a permanent location at *RESULT.
+ Returns true on success on false on allocation failure. In either
+ case, *LIST is re-initialized and can be reused. A NULL pointer is
+ stored in *RESULT if LIST refers to an empty list. On success, the
+ pointer in *RESULT is heap-allocated and must be deallocated using
+ free. */
+__attribute__ ((unused, warn_unused_result, nonnull (1, 2)))
+static bool
+DYNARRAY_NAME (finalize) (struct DYNARRAY_STRUCT *list,
+ DYNARRAY_FINAL_TYPE *result)
+{
+ struct dynarray_finalize_result res;
+ if (__libc_dynarray_finalize (&list->dynarray_abstract,
+ DYNARRAY_SCRATCH (list),
+ sizeof (DYNARRAY_ELEMENT), &res))
+ {
+ /* On success, the result owns all the data. */
+ DYNARRAY_NAME (init) (list);
+ *result = (DYNARRAY_FINAL_TYPE) { res.array, res.length };
+ return true;
+ }
+ else
+ {
+ /* On error, we need to free all data. */
+ DYNARRAY_NAME (free) (list);
+ errno = ENOMEM;
+ return false;
+ }
+}
+#else /* !DYNARRAY_FINAL_TYPE */
+/* Transfer the dynamic array to a heap-allocated array and return a
+ pointer to it. The pointer is NULL if memory allocation fails, or
+ if the array is empty, so this function should be used only for
+ arrays which are known not be empty (usually because they always
+ have a sentinel at the end). If LENGTHP is not NULL, the array
+ length is written to *LENGTHP. *LIST is re-initialized and can be
+ reused. */
+__attribute__ ((unused, warn_unused_result, nonnull (1)))
+static DYNARRAY_ELEMENT *
+DYNARRAY_NAME (finalize) (struct DYNARRAY_STRUCT *list, size_t *lengthp)
+{
+ struct dynarray_finalize_result res;
+ if (__libc_dynarray_finalize (&list->dynarray_abstract,
+ DYNARRAY_SCRATCH (list),
+ sizeof (DYNARRAY_ELEMENT), &res))
+ {
+ /* On success, the result owns all the data. */
+ DYNARRAY_NAME (init) (list);
+ if (lengthp != NULL)
+ *lengthp = res.length;
+ return res.array;
+ }
+ else
+ {
+ /* On error, we need to free all data. */
+ DYNARRAY_NAME (free) (list);
+ errno = ENOMEM;
+ return NULL;
+ }
+}
+#endif /* !DYNARRAY_FINAL_TYPE */
+
+/* Undo macro definitions. */
+
+#undef DYNARRAY_CONCAT0
+#undef DYNARRAY_CONCAT1
+#undef DYNARRAY_NAME
+#undef DYNARRAY_SCRATCH
+#undef DYNARRAY_HAVE_SCRATCH
+
+#undef DYNARRAY_STRUCT
+#undef DYNARRAY_ELEMENT
+#undef DYNARRAY_PREFIX
+#undef DYNARRAY_ELEMENT_FREE
+#undef DYNARRAY_ELEMENT_INIT
+#undef DYNARRAY_INITIAL_SIZE
+#undef DYNARRAY_FINAL_TYPE
diff --git a/malloc/dynarray.h b/malloc/dynarray.h
new file mode 100644
index 0000000..c73e08b
--- /dev/null
+++ b/malloc/dynarray.h
@@ -0,0 +1,176 @@
+/* Type-safe arrays which grow dynamically. Shared definitions.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* To use the dynarray facility, you need to include
+ <malloc/dynarray-skeleton.c> and define the parameter macros
+ documented in that file.
+
+ A minimal example which provides a growing list of integers can be
+ defined like this:
+
+ struct int_array
+ {
+ // Pointer to result array followed by its length,
+ // as required by DYNARRAY_FINAL_TYPE.
+ int *array;
+ size_t length;
+ };
+
+ #define DYNARRAY_STRUCT dynarray_int
+ #define DYNARRAY_ELEMENT int
+ #define DYNARRAY_PREFIX dynarray_int_
+ #define DYNARRAY_FINAL_TYPE struct int_array
+ #include <malloc/dynarray-skeleton.c>
+
+ To create a three-element array with elements 1, 2, 3, use this
+ code:
+
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ for (int i = 1; i <= 3; ++i)
+ {
+ int *place = dynarray_int_emplace (&dyn);
+ assert (place != NULL);
+ *place = i;
+ }
+ struct int_array result;
+ bool ok = dynarray_int_finalize (&dyn, &result);
+ assert (ok);
+ assert (result.length == 3);
+ assert (result.array[0] == 1);
+ assert (result.array[1] == 2);
+ assert (result.array[2] == 3);
+ free (result.array);
+
+ If the elements contain resources which must be freed, define
+ DYNARRAY_ELEMENT_FREE appropriately, like this:
+
+ struct str_array
+ {
+ char **array;
+ size_t length;
+ };
+
+ #define DYNARRAY_STRUCT dynarray_str
+ #define DYNARRAY_ELEMENT char *
+ #define DYNARRAY_ELEMENT_FREE(ptr) free (*ptr)
+ #define DYNARRAY_PREFIX dynarray_str_
+ #define DYNARRAY_FINAL_TYPE struct str_array
+ #include <malloc/dynarray-skeleton.c>
+
+ Compared to scratch buffers, dynamic arrays have the following
+ features:
+
+ - They have an element type, and are not just an untyped buffer of
+ bytes.
+
+ - When growing, previously stored elements are preserved. (It is
+ expected that scratch_buffer_grow_preserve and
+ scratch_buffer_set_array_size eventually go away because all
+ current users are moved to dynamic arrays.)
+
+ - Scratch buffers have a more aggressive growth policy because
+ growing them typically means a retry of an operation (across an
+ NSS service module boundary), which is expensive.
+
+ - For the same reason, scratch buffers have a much larger initial
+ stack allocation. */
+
+#ifndef _DYNARRAY_H
+#define _DYNARRAY_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+
+struct dynarray_header
+{
+ size_t used;
+ size_t allocated;
+ void *array;
+};
+
+/* Marker used in the allocated member to indicate that an error was
+ encountered. */
+static inline size_t
+__dynarray_error_marker (void)
+{
+ return -1;
+}
+
+/* Internal function. See the has_failed function in
+ dynarray-skeleton.c. */
+static inline bool
+__dynarray_error (struct dynarray_header *list)
+{
+ return list->allocated == __dynarray_error_marker ();
+}
+
+/* Internal function. Enlarge the dynamically allocated area of the
+ array to make room for one more element. SCRATCH is a pointer to
+ the scratch area (which is not heap-allocated and must not be
+ freed). ELEMENT_SIZE is the size, in bytes, of one element.
+ Return false on failure, true on success. */
+bool __libc_dynarray_emplace_enlarge (struct dynarray_header *,
+ void *scratch, size_t element_size);
+libc_hidden_proto (__libc_dynarray_emplace_enlarge)
+
+/* Internal function. Enlarge the dynamically allocated area of the
+ array to make room for at least SIZE elements (which must be larger
+ than the existing used part of the dynamic array). SCRATCH is a
+ pointer to the scratch area (which is not heap-allocated and must
+ not be freed). ELEMENT_SIZE is the size, in bytes, of one element.
+ Return false on failure, true on success. */
+bool __libc_dynarray_resize (struct dynarray_header *, size_t size,
+ void *scratch, size_t element_size);
+libc_hidden_proto (__libc_dynarray_resize)
+
+/* Internal function. Like __libc_dynarray_resize, but clear the new
+ part of the dynamic array. */
+bool __libc_dynarray_resize_clear (struct dynarray_header *, size_t size,
+ void *scratch, size_t element_size);
+libc_hidden_proto (__libc_dynarray_resize_clear)
+
+/* Internal type. */
+struct dynarray_finalize_result
+{
+ void *array;
+ size_t length;
+};
+
+/* Internal function. Copy the dynamically-allocated area to an
+ explicitly-sized heap allocation. SCRATCH is a pointer to the
+ embedded scratch space. ELEMENT_SIZE is the size, in bytes, of the
+ element type. On success, true is returned, and pointer and length
+ are written to *RESULT. On failure, false is returned. The caller
+ has to take care of some of the memory management; this function is
+ expected to be called from dynarray-skeleton.c. */
+bool __libc_dynarray_finalize (struct dynarray_header *list, void *scratch,
+ size_t element_size,
+ struct dynarray_finalize_result *result);
+libc_hidden_proto (__libc_dynarray_finalize)
+
+
+/* Internal function. Terminate the process after an index error.
+ SIZE is the number of elements of the dynamic array. INDEX is the
+ lookup index which triggered the failure. */
+void __libc_dynarray_at_failure (size_t size, size_t index)
+ __attribute__ ((noreturn));
+libc_hidden_proto (__libc_dynarray_at_failure)
+
+#endif /* _DYNARRAY_H */
diff --git a/malloc/dynarray_at_failure.c b/malloc/dynarray_at_failure.c
new file mode 100644
index 0000000..fcc06f0
--- /dev/null
+++ b/malloc/dynarray_at_failure.c
@@ -0,0 +1,31 @@
+/* Report an dynamic array index out of bounds condition.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <dynarray.h>
+#include <stdio.h>
+
+void
+__libc_dynarray_at_failure (size_t size, size_t index)
+{
+ char buf[200];
+ __snprintf (buf, sizeof (buf), "Fatal glibc error: "
+ "array index %zu not less than array length %zu\n",
+ index, size);
+ __libc_fatal (buf);
+}
+libc_hidden_def (__libc_dynarray_at_failure)
diff --git a/malloc/dynarray_emplace_enlarge.c b/malloc/dynarray_emplace_enlarge.c
new file mode 100644
index 0000000..dfc7001
--- /dev/null
+++ b/malloc/dynarray_emplace_enlarge.c
@@ -0,0 +1,69 @@
+/* Increase the size of a dynamic array in preparation of an emplace operation.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <dynarray.h>
+#include <malloc-internal.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool
+__libc_dynarray_emplace_enlarge (struct dynarray_header *list,
+ void *scratch, size_t element_size)
+{
+ size_t new_allocated;
+ if (list->allocated == 0)
+ {
+ /* No scratch buffer provided. Choose a reasonable default
+ size. */
+ if (element_size < 4)
+ new_allocated = 16;
+ if (element_size < 8)
+ new_allocated = 8;
+ else
+ new_allocated = 4;
+ }
+ else
+ /* Increase the allocated size, using an exponential growth
+ policy. */
+ {
+ new_allocated = list->allocated + list->allocated / 2 + 1;
+ if (new_allocated <= list->allocated)
+ /* Overflow. */
+ return false;
+ }
+
+ size_t new_size;
+ if (check_mul_overflow_size_t (new_allocated, element_size, &new_size))
+ return false;
+ void *new_array;
+ if (list->array == scratch)
+ {
+ /* The previous array was not heap-allocated. */
+ new_array = malloc (new_size);
+ if (new_array != NULL && list->array != NULL)
+ memcpy (new_array, list->array, list->used * element_size);
+ }
+ else
+ new_array = realloc (list->array, new_size);
+ if (new_array == NULL)
+ return false;
+ list->array = new_array;
+ list->allocated = new_allocated;
+ return true;
+}
+libc_hidden_def (__libc_dynarray_emplace_enlarge)
diff --git a/malloc/dynarray_finalize.c b/malloc/dynarray_finalize.c
new file mode 100644
index 0000000..6dd8705
--- /dev/null
+++ b/malloc/dynarray_finalize.c
@@ -0,0 +1,62 @@
+/* Copy the dynamically-allocated area to an explicitly-sized heap allocation.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <dynarray.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool
+__libc_dynarray_finalize (struct dynarray_header *list,
+ void *scratch, size_t element_size,
+ struct dynarray_finalize_result *result)
+{
+ if (__dynarray_error (list))
+ /* The caller will reported the deferred error. */
+ return false;
+
+ size_t used = list->used;
+
+ /* Empty list. */
+ if (used == 0)
+ {
+ /* An empty list could still be backed by a heap-allocated
+ array. Free it if necessary. */
+ if (list->array != scratch)
+ free (list->array);
+ *result = (struct dynarray_finalize_result) { NULL, 0 };
+ return true;
+ }
+
+ size_t allocation_size = used * element_size;
+ void *heap_array = malloc (allocation_size);
+ if (heap_array != NULL)
+ {
+ /* The new array takes ownership of the strings. */
+ if (list->array != NULL)
+ memcpy (heap_array, list->array, allocation_size);
+ if (list->array != scratch)
+ free (list->array);
+ *result = (struct dynarray_finalize_result)
+ { .array = heap_array, .length = used };
+ return true;
+ }
+ else
+ /* The caller will perform the freeing operation. */
+ return false;
+}
+libc_hidden_def (__libc_dynarray_finalize)
diff --git a/malloc/dynarray_resize.c b/malloc/dynarray_resize.c
new file mode 100644
index 0000000..e6dc9fb
--- /dev/null
+++ b/malloc/dynarray_resize.c
@@ -0,0 +1,59 @@
+/* Increase the size of a dynamic array.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <dynarray.h>
+#include <malloc-internal.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool
+__libc_dynarray_resize (struct dynarray_header *list, size_t size,
+ void *scratch, size_t element_size)
+{
+ /* The existing allocation provides sufficient room. */
+ if (size <= list->allocated)
+ {
+ list->used = size;
+ return true;
+ }
+
+ /* Otherwise, use size as the new allocation size. The caller is
+ expected to provide the final size of the array, so there is no
+ over-allocation here. */
+
+ size_t new_size_bytes;
+ if (check_mul_overflow_size_t (size, element_size, &new_size_bytes))
+ return false;
+ void *new_array;
+ if (list->array == scratch)
+ {
+ /* The previous array was not heap-allocated. */
+ new_array = malloc (new_size_bytes);
+ if (new_array != NULL && list->array != NULL)
+ memcpy (new_array, list->array, list->used * element_size);
+ }
+ else
+ new_array = realloc (list->array, new_size_bytes);
+ if (new_array == NULL)
+ return false;
+ list->array = new_array;
+ list->allocated = size;
+ list->used = size;
+ return true;
+}
+libc_hidden_def (__libc_dynarray_resize)
diff --git a/malloc/dynarray_resize_clear.c b/malloc/dynarray_resize_clear.c
new file mode 100644
index 0000000..0c4ced1
--- /dev/null
+++ b/malloc/dynarray_resize_clear.c
@@ -0,0 +1,35 @@
+/* Increase the size of a dynamic array and clear the new part.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <dynarray.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool
+__libc_dynarray_resize_clear (struct dynarray_header *list, size_t size,
+ void *scratch, size_t element_size)
+{
+ size_t old_size = list->used;
+ if (!__libc_dynarray_resize (list, size, scratch, element_size))
+ return false;
+ /* __libc_dynarray_resize already checked for overflow. */
+ memset (list->array + (old_size * element_size), 0,
+ (size - old_size) * element_size);
+ return true;
+}
+libc_hidden_def (__libc_dynarray_resize_clear)
diff --git a/malloc/tst-dynarray-at-fail.c b/malloc/tst-dynarray-at-fail.c
new file mode 100644
index 0000000..bc1a48c
--- /dev/null
+++ b/malloc/tst-dynarray-at-fail.c
@@ -0,0 +1,125 @@
+/* Test reporting of out-of-bounds access for dynamic arrays.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "tst-dynarray-shared.h"
+
+#include <signal.h>
+#include <stdint.h>
+#include <string.h>
+#include <support/capture_subprocess.h>
+#include <support/check.h>
+
+/* Run CALLBACK and check that the data on standard error equals
+ EXPECTED. */
+static void
+check (const char *test, void (*callback) (void *), size_t index,
+ const char *expected)
+{
+ struct support_capture_subprocess result
+ = support_capture_subprocess (callback, &index);
+ if (strcmp (result.err.buffer, expected) != 0)
+ {
+ support_record_failure ();
+ printf ("error: test %s (%zu) unexpected standard error data\n"
+ " expected: %s\n"
+ " actual: %s\n",
+ test, index, expected, result.err.buffer);
+ }
+ TEST_VERIFY (strlen (result.out.buffer) == 0);
+ TEST_VERIFY (WIFSIGNALED (result.status));
+ if (WIFSIGNALED (result.status))
+ TEST_VERIFY (WTERMSIG (result.status) == SIGABRT);
+ support_capture_subprocess_free (&result);
+}
+
+/* Try indexing an empty array. */
+static void
+test_empty (void *closure)
+{
+ size_t *pindex = closure;
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ dynarray_int_at (&dyn, *pindex);
+}
+
+/* Try indexing a one-element array. */
+static void
+test_one (void *closure)
+{
+ size_t *pindex = closure;
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ TEST_VERIFY (dynarray_int_resize (&dyn, 1));
+ dynarray_int_at (&dyn, *pindex);
+}
+
+/* Try indexing a longer array. */
+static void
+test_many (void *closure)
+{
+ size_t *pindex = closure;
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ TEST_VERIFY (dynarray_int_resize (&dyn, 5371));
+ dynarray_int_at (&dyn, *pindex);
+}
+
+/* (size_t) -1 for use in string literals. */
+#if SIZE_WIDTH == 32
+# define MINUS_1 "4294967295"
+#elif SIZE_WIDTH == 64
+# define MINUS_1 "18446744073709551615"
+#else
+# error "unknown value for SIZE_WIDTH"
+#endif
+
+static int
+do_test (void)
+{
+ TEST_VERIFY (setenv ("LIBC_FATAL_STDERR_", "1", 1) == 0);
+
+ check ("test_empty", test_empty, 0,
+ "Fatal glibc error: array index 0 not less than array length 0\n");
+ check ("test_empty", test_empty, 1,
+ "Fatal glibc error: array index 1 not less than array length 0\n");
+ check ("test_empty", test_empty, -1,
+ "Fatal glibc error: array index " MINUS_1
+ " not less than array length 0\n");
+
+ check ("test_one", test_one, 1,
+ "Fatal glibc error: array index 1 not less than array length 1\n");
+ check ("test_one", test_one, 2,
+ "Fatal glibc error: array index 2 not less than array length 1\n");
+ check ("test_one", test_one, -1,
+ "Fatal glibc error: array index " MINUS_1
+ " not less than array length 1\n");
+
+ check ("test_many", test_many, 5371,
+ "Fatal glibc error: array index 5371"
+ " not less than array length 5371\n");
+ check ("test_many", test_many, 5372,
+ "Fatal glibc error: array index 5372"
+ " not less than array length 5371\n");
+ check ("test_many", test_many, -1,
+ "Fatal glibc error: array index " MINUS_1
+ " not less than array length 5371\n");
+
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/malloc/tst-dynarray-fail.c b/malloc/tst-dynarray-fail.c
new file mode 100644
index 0000000..508dbae
--- /dev/null
+++ b/malloc/tst-dynarray-fail.c
@@ -0,0 +1,418 @@
+/* Test allocation failures with dynamic arrays.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* This test is separate from tst-dynarray because it cannot run under
+ valgrind. */
+
+#include "tst-dynarray-shared.h"
+
+#include <mcheck.h>
+#include <stdio.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/xunistd.h>
+#include <sys/mman.h>
+#include <sys/resource.h>
+#include <unistd.h>
+
+/* Data structure to fill up the heap. */
+struct heap_filler
+{
+ struct heap_filler *next;
+};
+
+/* Allocate objects until the heap is full. */
+static struct heap_filler *
+fill_heap (void)
+{
+ size_t pad = 4096;
+ struct heap_filler *head = NULL;
+ while (true)
+ {
+ struct heap_filler *new_head = malloc (sizeof (*new_head) + pad);
+ if (new_head == NULL)
+ {
+ if (pad > 0)
+ {
+ /* Try again with smaller allocations. */
+ pad = 0;
+ continue;
+ }
+ else
+ break;
+ }
+ new_head->next = head;
+ head = new_head;
+ }
+ return head;
+}
+
+/* Free the heap-filling allocations, so that we can continue testing
+ and detect memory leaks elsewhere. */
+static void
+free_fill_heap (struct heap_filler *head)
+{
+ while (head != NULL)
+ {
+ struct heap_filler *next = head->next;
+ free (head);
+ head = next;
+ }
+}
+
+/* Check allocation failures for int arrays (without an element free
+ function). */
+static void
+test_int_fail (void)
+{
+ /* Exercise failure in add/emplace.
+
+ do_add: Use emplace (false) or add (true) to add elements.
+ do_finalize: Perform finalization at the end (instead of free). */
+ for (int do_add = 0; do_add < 2; ++do_add)
+ for (int do_finalize = 0; do_finalize < 2; ++do_finalize)
+ {
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ size_t count = 0;
+ while (true)
+ {
+ if (do_add)
+ {
+ dynarray_int_add (&dyn, 0);
+ if (dynarray_int_has_failed (&dyn))
+ break;
+ }
+ else
+ {
+ int *place = dynarray_int_emplace (&dyn);
+ if (place == NULL)
+ break;
+ TEST_VERIFY_EXIT (!dynarray_int_has_failed (&dyn));
+ *place = 0;
+ }
+ ++count;
+ }
+ printf ("info: %s: failure after %zu elements\n", __func__, count);
+ TEST_VERIFY_EXIT (dynarray_int_has_failed (&dyn));
+ if (do_finalize)
+ {
+ struct int_array result = { (int *) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (!dynarray_int_finalize (&dyn, &result));
+ TEST_VERIFY_EXIT (result.array == (int *) (uintptr_t) -1);
+ TEST_VERIFY_EXIT (result.length == (size_t) -1);
+ }
+ else
+ dynarray_int_free (&dyn);
+ CHECK_INIT_STATE (int, &dyn);
+ }
+
+ /* Exercise failure in finalize. */
+ for (int do_add = 0; do_add < 2; ++do_add)
+ {
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ for (unsigned int i = 0; i < 10000; ++i)
+ {
+ if (do_add)
+ {
+ dynarray_int_add (&dyn, i);
+ TEST_VERIFY_EXIT (!dynarray_int_has_failed (&dyn));
+ }
+ else
+ {
+ int *place = dynarray_int_emplace (&dyn);
+ TEST_VERIFY_EXIT (place != NULL);
+ *place = i;
+ }
+ }
+ TEST_VERIFY_EXIT (!dynarray_int_has_failed (&dyn));
+ struct heap_filler *heap_filler = fill_heap ();
+ struct int_array result = { (int *) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (!dynarray_int_finalize (&dyn, &result));
+ TEST_VERIFY_EXIT (result.array == (int *) (uintptr_t) -1);
+ TEST_VERIFY_EXIT (result.length == (size_t) -1);
+ CHECK_INIT_STATE (int, &dyn);
+ free_fill_heap (heap_filler);
+ }
+
+ /* Exercise failure in resize. */
+ {
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ struct heap_filler *heap_filler = fill_heap ();
+ TEST_VERIFY (!dynarray_int_resize (&dyn, 1000));
+ TEST_VERIFY (dynarray_int_has_failed (&dyn));
+ free_fill_heap (heap_filler);
+
+ dynarray_int_init (&dyn);
+ TEST_VERIFY (dynarray_int_resize (&dyn, 1));
+ heap_filler = fill_heap ();
+ TEST_VERIFY (!dynarray_int_resize (&dyn, 1000));
+ TEST_VERIFY (dynarray_int_has_failed (&dyn));
+ free_fill_heap (heap_filler);
+
+ dynarray_int_init (&dyn);
+ TEST_VERIFY (dynarray_int_resize (&dyn, 1000));
+ heap_filler = fill_heap ();
+ TEST_VERIFY (!dynarray_int_resize (&dyn, 2000));
+ TEST_VERIFY (dynarray_int_has_failed (&dyn));
+ free_fill_heap (heap_filler);
+ }
+}
+
+/* Check allocation failures for char * arrays (which automatically
+ free the pointed-to strings). */
+static void
+test_str_fail (void)
+{
+ /* Exercise failure in add/emplace.
+
+ do_add: Use emplace (false) or add (true) to add elements.
+ do_finalize: Perform finalization at the end (instead of free). */
+ for (int do_add = 0; do_add < 2; ++do_add)
+ for (int do_finalize = 0; do_finalize < 2; ++do_finalize)
+ {
+ struct dynarray_str dyn;
+ dynarray_str_init (&dyn);
+ size_t count = 0;
+ while (true)
+ {
+ char **place;
+ if (do_add)
+ {
+ dynarray_str_add (&dyn, NULL);
+ if (dynarray_str_has_failed (&dyn))
+ break;
+ else
+ place = dynarray_str_at (&dyn, dynarray_str_size (&dyn) - 1);
+ }
+ else
+ {
+ place = dynarray_str_emplace (&dyn);
+ if (place == NULL)
+ break;
+ }
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ TEST_VERIFY_EXIT (*place == NULL);
+ *place = strdup ("placeholder");
+ if (*place == NULL)
+ {
+ /* Second loop to wait for failure of
+ dynarray_str_emplace. */
+ while (true)
+ {
+ if (do_add)
+ {
+ dynarray_str_add (&dyn, NULL);
+ if (dynarray_str_has_failed (&dyn))
+ break;
+ }
+ else
+ {
+ char **place = dynarray_str_emplace (&dyn);
+ if (place == NULL)
+ break;
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ *place = NULL;
+ }
+ ++count;
+ }
+ break;
+ }
+ ++count;
+ }
+ printf ("info: %s: failure after %zu elements\n", __func__, count);
+ TEST_VERIFY_EXIT (dynarray_str_has_failed (&dyn));
+ if (do_finalize)
+ {
+ struct str_array result = { (char **) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (!dynarray_str_finalize (&dyn, &result));
+ TEST_VERIFY_EXIT (result.array == (char **) (uintptr_t) -1);
+ TEST_VERIFY_EXIT (result.length == (size_t) -1);
+ }
+ else
+ dynarray_str_free (&dyn);
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ TEST_VERIFY_EXIT (dyn.dynarray_header.array == dyn.scratch);
+ TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == 0);
+ TEST_VERIFY_EXIT (dyn.dynarray_header.allocated > 0);
+ }
+
+ /* Exercise failure in finalize. */
+ for (int do_add = 0; do_add < 2; ++do_add)
+ {
+ struct dynarray_str dyn;
+ dynarray_str_init (&dyn);
+ for (unsigned int i = 0; i < 1000; ++i)
+ {
+ if (do_add)
+ dynarray_str_add (&dyn, xstrdup ("placeholder"));
+ else
+ {
+ char **place = dynarray_str_emplace (&dyn);
+ TEST_VERIFY_EXIT (place != NULL);
+ TEST_VERIFY_EXIT (*place == NULL);
+ *place = xstrdup ("placeholder");
+ }
+ }
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ struct heap_filler *heap_filler = fill_heap ();
+ struct str_array result = { (char **) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (!dynarray_str_finalize (&dyn, &result));
+ TEST_VERIFY_EXIT (result.array == (char **) (uintptr_t) -1);
+ TEST_VERIFY_EXIT (result.length == (size_t) -1);
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ TEST_VERIFY_EXIT (dyn.dynarray_header.array == dyn.scratch);
+ TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == 0);
+ TEST_VERIFY_EXIT (dyn.dynarray_header.allocated > 0);
+ free_fill_heap (heap_filler);
+ }
+
+ /* Exercise failure in resize. */
+ {
+ struct dynarray_str dyn;
+ dynarray_str_init (&dyn);
+ struct heap_filler *heap_filler = fill_heap ();
+ TEST_VERIFY (!dynarray_str_resize (&dyn, 1000));
+ TEST_VERIFY (dynarray_str_has_failed (&dyn));
+ free_fill_heap (heap_filler);
+
+ dynarray_str_init (&dyn);
+ TEST_VERIFY (dynarray_str_resize (&dyn, 1));
+ *dynarray_str_at (&dyn, 0) = xstrdup ("allocated");
+ heap_filler = fill_heap ();
+ TEST_VERIFY (!dynarray_str_resize (&dyn, 1000));
+ TEST_VERIFY (dynarray_str_has_failed (&dyn));
+ free_fill_heap (heap_filler);
+
+ dynarray_str_init (&dyn);
+ TEST_VERIFY (dynarray_str_resize (&dyn, 1000));
+ *dynarray_str_at (&dyn, 0) = xstrdup ("allocated");
+ heap_filler = fill_heap ();
+ TEST_VERIFY (!dynarray_str_resize (&dyn, 2000));
+ TEST_VERIFY (dynarray_str_has_failed (&dyn));
+ free_fill_heap (heap_filler);
+ }
+}
+
+/* Test if mmap can allocate a page. This is necessary because
+ setrlimit does not fail even if it reduces the RLIMIT_AS limit
+ below what is currently needed by the process. */
+static bool
+mmap_works (void)
+{
+ void *ptr = mmap (NULL, 1, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (ptr == MAP_FAILED)
+ return false;
+ xmunmap (ptr, 1);
+ return true;
+}
+
+/* Set the RLIMIT_AS limit to the value in *LIMIT. */
+static void
+xsetrlimit_as (const struct rlimit *limit)
+{
+ if (setrlimit (RLIMIT_AS, limit) != 0)
+ FAIL_EXIT1 ("setrlimit (RLIMIT_AS, %lu): %m",
+ (unsigned long) limit->rlim_cur);
+}
+
+/* Approximately this many bytes can be allocated after
+ reduce_rlimit_as has run. */
+enum { as_limit_reserve = 2 * 1024 * 1024 };
+
+/* Limit the size of the process, so that memory allocation in
+ allocate_thread will eventually fail, without impacting the entire
+ system. By default, a dynamic limit which leaves room for 2 MiB is
+ activated. The TEST_RLIMIT_AS environment variable overrides
+ it. */
+static void
+reduce_rlimit_as (void)
+{
+ struct rlimit limit;
+ if (getrlimit (RLIMIT_AS, &limit) != 0)
+ FAIL_EXIT1 ("getrlimit (RLIMIT_AS) failed: %m");
+
+ /* Use the TEST_RLIMIT_AS setting if available. */
+ {
+ long target = 0;
+ const char *variable = "TEST_RLIMIT_AS";
+ const char *target_str = getenv (variable);
+ if (target_str != NULL)
+ {
+ target = atoi (target_str);
+ if (target <= 0)
+ FAIL_EXIT1 ("invalid %s value: \"%s\"", variable, target_str);
+ printf ("info: setting RLIMIT_AS to %ld MiB\n", target);
+ target *= 1024 * 1024; /* Convert to megabytes. */
+ limit.rlim_cur = target;
+ xsetrlimit_as (&limit);
+ return;
+ }
+ }
+
+ /* Otherwise, try to find the limit with a binary search. */
+ unsigned long low = 1 << 20;
+ limit.rlim_cur = low;
+ xsetrlimit_as (&limit);
+
+ /* Find working upper limit. */
+ unsigned long high = 1 << 30;
+ while (true)
+ {
+ limit.rlim_cur = high;
+ xsetrlimit_as (&limit);
+ if (mmap_works ())
+ break;
+ if (2 * high < high)
+ FAIL_EXIT1 ("cannot find upper AS limit");
+ high *= 2;
+ }
+
+ /* Perform binary search. */
+ while ((high - low) > 128 * 1024)
+ {
+ unsigned long middle = (low + high) / 2;
+ limit.rlim_cur = middle;
+ xsetrlimit_as (&limit);
+ if (mmap_works ())
+ high = middle;
+ else
+ low = middle;
+ }
+
+ unsigned long target = high + as_limit_reserve;
+ limit.rlim_cur = target;
+ xsetrlimit_as (&limit);
+ printf ("info: RLIMIT_AS limit: %lu bytes\n", target);
+}
+
+static int
+do_test (void)
+{
+ mtrace ();
+ reduce_rlimit_as ();
+ test_int_fail ();
+ test_str_fail ();
+ return 0;
+}
+
+#define TIMEOUT 90
+#include <support/test-driver.c>
diff --git a/malloc/tst-dynarray-shared.h b/malloc/tst-dynarray-shared.h
new file mode 100644
index 0000000..faba66f
--- /dev/null
+++ b/malloc/tst-dynarray-shared.h
@@ -0,0 +1,77 @@
+/* Shared definitions for dynarray tests.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <stddef.h>
+
+struct int_array
+{
+ int *array;
+ size_t length;
+};
+
+#define DYNARRAY_STRUCT dynarray_int
+#define DYNARRAY_ELEMENT int
+#define DYNARRAY_PREFIX dynarray_int_
+#define DYNARRAY_FINAL_TYPE struct int_array
+#include <malloc/dynarray-skeleton.c>
+
+struct str_array
+{
+ char **array;
+ size_t length;
+};
+
+#define DYNARRAY_STRUCT dynarray_str
+#define DYNARRAY_ELEMENT char *
+#define DYNARRAY_ELEMENT_FREE(ptr) free (*ptr)
+#define DYNARRAY_PREFIX dynarray_str_
+#define DYNARRAY_FINAL_TYPE struct str_array
+#include <malloc/dynarray-skeleton.c>
+
+/* Check that *DYN is equivalent to its initial state. */
+#define CHECK_INIT_STATE(type, dyn) \
+ ({ \
+ TEST_VERIFY_EXIT (!dynarray_##type##_has_failed (dyn)); \
+ TEST_VERIFY_EXIT (dynarray_##type##_size (dyn) == 0); \
+ TEST_VERIFY_EXIT ((dyn)->dynarray_header.array \
+ == (dyn)->scratch); \
+ TEST_VERIFY_EXIT ((dyn)->dynarray_header.allocated > 0); \
+ (void) 0; \
+ })
+
+/* Check that *DYN behaves as if it is in its initial state. */
+#define CHECK_EMPTY(type, dyn) \
+ ({ \
+ CHECK_INIT_STATE (type, (dyn)); \
+ dynarray_##type##_free (dyn); \
+ CHECK_INIT_STATE (type, (dyn)); \
+ dynarray_##type##_clear (dyn); \
+ CHECK_INIT_STATE (type, (dyn)); \
+ dynarray_##type##_remove_last (dyn); \
+ CHECK_INIT_STATE (type, (dyn)); \
+ dynarray_##type##_mark_failed (dyn); \
+ TEST_VERIFY_EXIT (dynarray_##type##_has_failed (dyn)); \
+ dynarray_##type##_clear (dyn); \
+ TEST_VERIFY_EXIT (dynarray_##type##_has_failed (dyn)); \
+ dynarray_##type##_remove_last (dyn); \
+ TEST_VERIFY_EXIT (dynarray_##type##_has_failed (dyn)); \
+ TEST_VERIFY_EXIT (dynarray_##type##_emplace (dyn) == NULL); \
+ dynarray_##type##_free (dyn); \
+ CHECK_INIT_STATE (type, (dyn)); \
+ (void) 0; \
+ })
diff --git a/malloc/tst-dynarray.c b/malloc/tst-dynarray.c
new file mode 100644
index 0000000..7aee85a
--- /dev/null
+++ b/malloc/tst-dynarray.c
@@ -0,0 +1,517 @@
+/* Test for dynamic arrays.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "tst-dynarray-shared.h"
+
+#define DYNARRAY_STRUCT dynarray_long
+#define DYNARRAY_ELEMENT long
+#define DYNARRAY_PREFIX dynarray_long_
+#define DYNARRAY_ELEMENT_INIT(e) (*(e) = 17)
+#include <malloc/dynarray-skeleton.c>
+
+struct long_array
+{
+ long *array;
+ size_t length;
+};
+
+#define DYNARRAY_STRUCT dynarray_long_noscratch
+#define DYNARRAY_ELEMENT long
+#define DYNARRAY_PREFIX dynarray_long_noscratch_
+#define DYNARRAY_ELEMENT_INIT(e) (*(e) = 23)
+#define DYNARRAY_FINAL_TYPE struct long_array
+#define DYNARRAY_INITIAL_SIZE 0
+#include <malloc/dynarray-skeleton.c>
+
+#define DYNARRAY_STRUCT zstr
+#define DYNARRAY_ELEMENT char
+#define DYNARRAY_PREFIX zstr_
+#define DYNARRAY_INITIAL_SIZE 128
+#include <malloc/dynarray-skeleton.c>
+
+#include <malloc.h>
+#include <mcheck.h>
+#include <stdint.h>
+#include <support/check.h>
+#include <support/support.h>
+
+enum { max_count = 20 };
+
+/* Test dynamic arrays with int elements (no automatic deallocation
+ for elements). */
+static void
+test_int (void)
+{
+ /* Empty array. */
+ {
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ CHECK_EMPTY (int, &dyn);
+ }
+
+ /* Empty array with finalization. */
+ {
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ CHECK_INIT_STATE (int, &dyn);
+ struct int_array result = { (int *) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (dynarray_int_finalize (&dyn, &result));
+ CHECK_INIT_STATE (int, &dyn);
+ TEST_VERIFY_EXIT (result.array == NULL);
+ TEST_VERIFY_EXIT (result.length == 0);
+ }
+
+ /* Non-empty array tests.
+
+ do_add: Switch between emplace (false) and add (true).
+ do_finalize: Perform finalize call at the end.
+ do_clear: Perform clear call at the end.
+ do_remove_last: Perform remove_last call after adding elements.
+ count: Number of elements added to the array. */
+ for (int do_add = 0; do_add < 2; ++do_add)
+ for (int do_finalize = 0; do_finalize < 2; ++do_finalize)
+ for (int do_clear = 0; do_clear < 2; ++do_clear)
+ for (int do_remove_last = 0; do_remove_last < 2; ++do_remove_last)
+ for (unsigned int count = 0; count < max_count; ++count)
+ {
+ if (do_remove_last && count == 0)
+ continue;
+ unsigned int base = count * count;
+ struct dynarray_int dyn;
+ dynarray_int_init (&dyn);
+ for (unsigned int i = 0; i < count; ++i)
+ {
+ if (do_add)
+ dynarray_int_add (&dyn, base + i);
+ else
+ {
+ int *place = dynarray_int_emplace (&dyn);
+ TEST_VERIFY_EXIT (place != NULL);
+ *place = base + i;
+ }
+ TEST_VERIFY_EXIT (!dynarray_int_has_failed (&dyn));
+ TEST_VERIFY_EXIT (dynarray_int_size (&dyn) == i + 1);
+ TEST_VERIFY_EXIT (dynarray_int_size (&dyn)
+ <= dyn.dynarray_header.allocated);
+ }
+ TEST_VERIFY_EXIT (dynarray_int_size (&dyn) == count);
+ TEST_VERIFY_EXIT (count <= dyn.dynarray_header.allocated);
+ unsigned final_count;
+ bool heap_array = dyn.dynarray_header.array != dyn.scratch;
+ if (do_remove_last)
+ {
+ dynarray_int_remove_last (&dyn);
+ if (count == 0)
+ final_count = 0;
+ else
+ final_count = count - 1;
+ }
+ else
+ final_count = count;
+ if (do_clear)
+ {
+ dynarray_int_clear (&dyn);
+ final_count = 0;
+ }
+ TEST_VERIFY_EXIT (!dynarray_int_has_failed (&dyn));
+ TEST_VERIFY_EXIT ((dyn.dynarray_header.array != dyn.scratch)
+ == heap_array);
+ TEST_VERIFY_EXIT (dynarray_int_size (&dyn) == final_count);
+ TEST_VERIFY_EXIT (dyn.dynarray_header.allocated >= final_count);
+ if (!do_clear)
+ for (unsigned int i = 0; i < final_count; ++i)
+ TEST_VERIFY_EXIT (*dynarray_int_at (&dyn, i) == base + i);
+ if (do_finalize)
+ {
+ struct int_array result = { (int *) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (dynarray_int_finalize (&dyn, &result));
+ CHECK_INIT_STATE (int, &dyn);
+ TEST_VERIFY_EXIT (result.length == final_count);
+ if (final_count == 0)
+ TEST_VERIFY_EXIT (result.array == NULL);
+ else
+ {
+ TEST_VERIFY_EXIT (result.array != NULL);
+ TEST_VERIFY_EXIT (result.array != (int *) (uintptr_t) -1);
+ TEST_VERIFY_EXIT
+ (malloc_usable_size (result.array)
+ >= final_count * sizeof (result.array[0]));
+ for (unsigned int i = 0; i < final_count; ++i)
+ TEST_VERIFY_EXIT (result.array[i] == base + i);
+ free (result.array);
+ }
+ }
+ else /* !do_finalize */
+ {
+ dynarray_int_free (&dyn);
+ CHECK_INIT_STATE (int, &dyn);
+ }
+ }
+}
+
+/* Test dynamic arrays with char * elements (with automatic
+ deallocation of the pointed-to strings). */
+static void
+test_str (void)
+{
+ /* Empty array. */
+ {
+ struct dynarray_str dyn;
+ dynarray_str_init (&dyn);
+ CHECK_EMPTY (str, &dyn);
+ }
+
+ /* Empty array with finalization. */
+ {
+ struct dynarray_str dyn;
+ dynarray_str_init (&dyn);
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ struct str_array result = { (char **) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (dynarray_str_finalize (&dyn, &result));
+ CHECK_INIT_STATE (str, &dyn);
+ TEST_VERIFY_EXIT (result.array == NULL);
+ TEST_VERIFY_EXIT (result.length == 0);
+ }
+
+ /* Non-empty array tests.
+
+ do_add: Switch between emplace (false) and add (true).
+ do_finalize: Perform finalize call at the end.
+ do_clear: Perform clear call at the end.
+ do_remove_last: Perform remove_last call after adding elements.
+ count: Number of elements added to the array. */
+ for (int do_add = 0; do_add < 2; ++do_add)
+ for (int do_finalize = 0; do_finalize < 2; ++do_finalize)
+ for (int do_clear = 0; do_clear < 2; ++do_clear)
+ for (int do_remove_last = 0; do_remove_last < 2; ++do_remove_last)
+ for (unsigned int count = 0; count < max_count; ++count)
+ {
+ if (do_remove_last && count == 0)
+ continue;
+ unsigned int base = count * count;
+ struct dynarray_str dyn;
+ dynarray_str_init (&dyn);
+ for (unsigned int i = 0; i < count; ++i)
+ {
+ char *item = xasprintf ("%d", base + i);
+ if (do_add)
+ dynarray_str_add (&dyn, item);
+ else
+ {
+ char **place = dynarray_str_emplace (&dyn);
+ TEST_VERIFY_EXIT (place != NULL);
+ TEST_VERIFY_EXIT (*place == NULL);
+ *place = item;
+ }
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == i + 1);
+ TEST_VERIFY_EXIT (dynarray_str_size (&dyn)
+ <= dyn.dynarray_header.allocated);
+ }
+ TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == count);
+ TEST_VERIFY_EXIT (count <= dyn.dynarray_header.allocated);
+ unsigned final_count;
+ bool heap_array = dyn.dynarray_header.array != dyn.scratch;
+ if (do_remove_last)
+ {
+ dynarray_str_remove_last (&dyn);
+ if (count == 0)
+ final_count = 0;
+ else
+ final_count = count - 1;
+ }
+ else
+ final_count = count;
+ if (do_clear)
+ {
+ dynarray_str_clear (&dyn);
+ final_count = 0;
+ }
+ TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
+ TEST_VERIFY_EXIT ((dyn.dynarray_header.array != dyn.scratch)
+ == heap_array);
+ TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == final_count);
+ TEST_VERIFY_EXIT (dyn.dynarray_header.allocated >= final_count);
+ if (!do_clear)
+ for (unsigned int i = 0; i < count - do_remove_last; ++i)
+ {
+ char *expected = xasprintf ("%d", base + i);
+ const char *actual = *dynarray_str_at (&dyn, i);
+ TEST_VERIFY_EXIT (strcmp (actual, expected) == 0);
+ free (expected);
+ }
+ if (do_finalize)
+ {
+ struct str_array result = { (char **) (uintptr_t) -1, -1 };
+ TEST_VERIFY_EXIT (dynarray_str_finalize (&dyn, &result));
+ CHECK_INIT_STATE (str, &dyn);
+ TEST_VERIFY_EXIT (result.length == final_count);
+ if (final_count == 0)
+ TEST_VERIFY_EXIT (result.array == NULL);
+ else
+ {
+ TEST_VERIFY_EXIT (result.array != NULL);
+ TEST_VERIFY_EXIT (result.array
+ != (char **) (uintptr_t) -1);
+ TEST_VERIFY_EXIT (result.length
+ == count - do_remove_last);
+ TEST_VERIFY_EXIT
+ (malloc_usable_size (result.array)
+ >= final_count * sizeof (result.array[0]));
+ for (unsigned int i = 0; i < count - do_remove_last; ++i)
+ {
+ char *expected = xasprintf ("%d", base + i);
+ char *actual = result.array[i];
+ TEST_VERIFY_EXIT (strcmp (actual, expected) == 0);
+ free (expected);
+ free (actual);
+ }
+ free (result.array);
+ }
+ }
+ else /* !do_finalize */
+ {
+ dynarray_str_free (&dyn);
+ CHECK_INIT_STATE (str, &dyn);
+ }
+ }
+
+ /* Test resizing. */
+ {
+ enum { count = 2131 };
+ struct dynarray_str dyn;
+ dynarray_str_init (&dyn);
+
+ /* From length 0 to length 1. */
+ TEST_VERIFY (dynarray_str_resize (&dyn, 1));
+ TEST_VERIFY (dynarray_str_size (&dyn) == 1);
+ TEST_VERIFY (*dynarray_str_at (&dyn, 0) == NULL);
+ *dynarray_str_at (&dyn, 0) = xstrdup ("allocated");
+ dynarray_str_free (&dyn);
+
+ /* From length 0 to length 1 and 2. */
+ TEST_VERIFY (dynarray_str_resize (&dyn, 1));
+ TEST_VERIFY (dynarray_str_size (&dyn) == 1);
+ TEST_VERIFY (*dynarray_str_at (&dyn, 0) == NULL);
+ *dynarray_str_at (&dyn, 0) = xstrdup ("allocated0");
+ TEST_VERIFY (dynarray_str_resize (&dyn, 2));
+ TEST_VERIFY (dynarray_str_size (&dyn) == 2);
+ TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 0), "allocated0") == 0);
+ TEST_VERIFY (*dynarray_str_at (&dyn, 1) == NULL);
+ *dynarray_str_at (&dyn, 1) = xstrdup ("allocated1");
+ TEST_VERIFY (dynarray_str_resize (&dyn, count));
+ TEST_VERIFY (dynarray_str_size (&dyn) == count);
+ TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 0), "allocated0") == 0);
+ TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 1), "allocated1") == 0);
+ for (int i = 2; i < count; ++i)
+ TEST_VERIFY (*dynarray_str_at (&dyn, i) == NULL);
+ *dynarray_str_at (&dyn, count - 1) = xstrdup ("allocated2");
+ TEST_VERIFY (dynarray_str_resize (&dyn, 3));
+ TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 0), "allocated0") == 0);
+ TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 1), "allocated1") == 0);
+ TEST_VERIFY (*dynarray_str_at (&dyn, 2) == NULL);
+ dynarray_str_free (&dyn);
+ }
+}
+
+/* Verify that DYNARRAY_ELEMENT_INIT has an effect. */
+static void
+test_long_init (void)
+{
+ enum { count = 2131 };
+ {
+ struct dynarray_long dyn;
+ dynarray_long_init (&dyn);
+ for (int i = 0; i < count; ++i)
+ {
+ long *place = dynarray_long_emplace (&dyn);
+ TEST_VERIFY_EXIT (place != NULL);
+ TEST_VERIFY (*place == 17);
+ }
+ TEST_VERIFY (dynarray_long_size (&dyn) == count);
+ for (int i = 0; i < count; ++i)
+ TEST_VERIFY (*dynarray_long_at (&dyn, i) == 17);
+ dynarray_long_free (&dyn);
+
+ TEST_VERIFY (dynarray_long_resize (&dyn, 1));
+ TEST_VERIFY (dynarray_long_size (&dyn) == 1);
+ TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 17);
+ *dynarray_long_at (&dyn, 0) = 18;
+ dynarray_long_free (&dyn);
+ TEST_VERIFY (dynarray_long_resize (&dyn, 1));
+ TEST_VERIFY (dynarray_long_size (&dyn) == 1);
+ TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 17);
+ TEST_VERIFY (dynarray_long_resize (&dyn, 2));
+ TEST_VERIFY (dynarray_long_size (&dyn) == 2);
+ TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 17);
+ TEST_VERIFY (*dynarray_long_at (&dyn, 1) == 17);
+ *dynarray_long_at (&dyn, 0) = 18;
+ TEST_VERIFY (dynarray_long_resize (&dyn, count));
+ TEST_VERIFY (dynarray_long_size (&dyn) == count);
+ TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 18);
+ for (int i = 1; i < count; ++i)
+ TEST_VERIFY (*dynarray_long_at (&dyn, i) == 17);
+ dynarray_long_free (&dyn);
+ }
+
+ /* Similar, but without an on-stack scratch region
+ (DYNARRAY_INITIAL_SIZE is 0). */
+ {
+ struct dynarray_long_noscratch dyn;
+ dynarray_long_noscratch_init (&dyn);
+ struct long_array result;
+ TEST_VERIFY_EXIT (dynarray_long_noscratch_finalize (&dyn, &result));
+ TEST_VERIFY (result.array == NULL);
+ TEST_VERIFY (result.length == 0);
+
+ /* Test with one element. */
+ {
+ long *place = dynarray_long_noscratch_emplace (&dyn);
+ TEST_VERIFY_EXIT (place != NULL);
+ TEST_VERIFY (*place == 23);
+ }
+ TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 1);
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
+ TEST_VERIFY_EXIT (dynarray_long_noscratch_finalize (&dyn, &result));
+ TEST_VERIFY_EXIT (result.array != NULL);
+ TEST_VERIFY (result.length == 1);
+ TEST_VERIFY (result.array[0] == 23);
+ free (result.array);
+
+ for (int i = 0; i < count; ++i)
+ {
+ long *place = dynarray_long_noscratch_emplace (&dyn);
+ TEST_VERIFY_EXIT (place != NULL);
+ TEST_VERIFY (*place == 23);
+ if (i == 0)
+ *place = 29;
+ }
+ TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == count);
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 29);
+ for (int i = 1; i < count; ++i)
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, i) == 23);
+ TEST_VERIFY_EXIT (dynarray_long_noscratch_finalize (&dyn, &result));
+ TEST_VERIFY_EXIT (result.array != NULL);
+ TEST_VERIFY (result.length == count);
+ TEST_VERIFY (result.array[0] == 29);
+ for (int i = 1; i < count; ++i)
+ TEST_VERIFY (result.array[i] == 23);
+ free (result.array);
+
+ TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, 1));
+ TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 1);
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
+ *dynarray_long_noscratch_at (&dyn, 0) = 24;
+ dynarray_long_noscratch_free (&dyn);
+ TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, 1));
+ TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 1);
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
+ TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, 2));
+ TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 2);
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 1) == 23);
+ *dynarray_long_noscratch_at (&dyn, 0) = 24;
+ TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, count));
+ TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == count);
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 24);
+ for (int i = 1; i < count; ++i)
+ TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, i) == 23);
+ dynarray_long_noscratch_free (&dyn);
+ }
+}
+
+/* Test NUL-terminated string construction with the add function and
+ the simple finalize function. */
+static void
+test_zstr (void)
+{
+ /* Totally empty string (no NUL termination). */
+ {
+ struct zstr s;
+ zstr_init (&s);
+ char *result = zstr_finalize (&s, NULL);
+ TEST_VERIFY (result == NULL);
+ TEST_VERIFY (zstr_size (&s) == 0);
+ size_t length = 1;
+ result = zstr_finalize (&s, &length);
+ TEST_VERIFY (result == NULL);
+ TEST_VERIFY (length == 0);
+ TEST_VERIFY (zstr_size (&s) == 0);
+ }
+
+ /* Empty string. */
+ {
+ struct zstr s;
+ zstr_init (&s);
+ zstr_add (&s, '\0');
+ char *result = zstr_finalize (&s, NULL);
+ TEST_VERIFY_EXIT (result != NULL);
+ TEST_VERIFY (*result == '\0');
+ TEST_VERIFY (zstr_size (&s) == 0);
+ free (result);
+
+ zstr_add (&s, '\0');
+ size_t length = 1;
+ result = zstr_finalize (&s, &length);
+ TEST_VERIFY_EXIT (result != NULL);
+ TEST_VERIFY (*result == '\0');
+ TEST_VERIFY (length == 1);
+ TEST_VERIFY (zstr_size (&s) == 0);
+ free (result);
+ }
+
+ /* A few characters. */
+ {
+ struct zstr s;
+ zstr_init (&s);
+ zstr_add (&s, 'A');
+ zstr_add (&s, 'b');
+ zstr_add (&s, 'c');
+ zstr_add (&s, '\0');
+ char *result = zstr_finalize (&s, NULL);
+ TEST_VERIFY_EXIT (result != NULL);
+ TEST_VERIFY (strcmp (result, "Abc") == 0);
+ TEST_VERIFY (zstr_size (&s) == 0);
+ free (result);
+
+ zstr_add (&s, 'X');
+ zstr_add (&s, 'y');
+ zstr_add (&s, 'z');
+ zstr_add (&s, '\0');
+ size_t length = 1;
+ result = zstr_finalize (&s, &length);
+ TEST_VERIFY_EXIT (result != NULL);
+ TEST_VERIFY (strcmp (result, "Xyz") == 0);
+ TEST_VERIFY (length == 4);
+ TEST_VERIFY (zstr_size (&s) == 0);
+ free (result);
+ }
+}
+
+static int
+do_test (void)
+{
+ mtrace ();
+ test_int ();
+ test_str ();
+ test_long_init ();
+ test_zstr ();
+ return 0;
+}
+
+#include <support/test-driver.c>
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ea00a80db7c0cd1098f848eccd5d1f34d89b7faf
commit ea00a80db7c0cd1098f848eccd5d1f34d89b7faf
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Jan 4 12:51:48 2018 +0100
Add check_mul_overflow_size_t
Backported from commit 2e0bbbfbf95fc9e22692e93658a6fbdd2d4554da.
diff --git a/ChangeLog b/ChangeLog
index 4c11b72..fff166c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
2018-01-04 Florian Weimer <fweimer@redhat.com>
+ * malloc/malloc-internal.h (check_mul_overflow_size_t): New.
+
+2018-01-04 Florian Weimer <fweimer@redhat.com>
+
* include/libc-pointer-arith.h: New file.
2017-09-01 Florian Weimer <fweimer@redhat.com>
diff --git a/malloc/malloc-internal.h b/malloc/malloc-internal.h
index de6103d..dbd801a 100644
--- a/malloc/malloc-internal.h
+++ b/malloc/malloc-internal.h
@@ -81,5 +81,24 @@ void __malloc_fork_unlock_parent (void) internal_function attribute_hidden;
/* Called in the child process after a fork. */
void __malloc_fork_unlock_child (void) internal_function attribute_hidden;
+/* Set *RESULT to LEFT * RIGHT. Return true if the multiplication
+ overflowed. */
+static inline bool
+check_mul_overflow_size_t (size_t left, size_t right, size_t *result)
+{
+#if __GNUC__ >= 5
+ return __builtin_mul_overflow (left, right, result);
+#else
+ /* size_t is unsigned so the behavior on overflow is defined. */
+ *result = left * right;
+ size_t half_size_t = ((size_t) 1) << (8 * sizeof (size_t) / 2);
+ if (__glibc_unlikely ((left | right) >= half_size_t))
+ {
+ if (__glibc_unlikely (right != 0 && *result / right != left))
+ return true;
+ }
+ return false;
+#endif
+}
#endif /* _MALLOC_INTERNAL_H */
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ab8b49432b302237015d0f44e858c17f92fe3a5b
commit ab8b49432b302237015d0f44e858c17f92fe3a5b
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Jan 4 12:45:41 2018 +0100
Add <libc-pointer-arith.h> to help with backporting
diff --git a/ChangeLog b/ChangeLog
index 96a58d5..4c11b72 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-01-04 Florian Weimer <fweimer@redhat.com>
+
+ * include/libc-pointer-arith.h: New file.
+
2017-09-01 Florian Weimer <fweimer@redhat.com>
[BZ #21915]
diff --git a/include/libc-pointer-arith.h b/include/libc-pointer-arith.h
new file mode 100644
index 0000000..5876a41
--- /dev/null
+++ b/include/libc-pointer-arith.h
@@ -0,0 +1 @@
+#include <libc-internal.h>
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=0e64ee798605a042a07604e8a4bf0ec00381e28b
commit 0e64ee798605a042a07604e8a4bf0ec00381e28b
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Jan 4 12:32:36 2018 +0100
getaddrinfo: Fix error handling in gethosts [BZ #21915] [BZ #21922]
The old code uses errno as the primary indicator for success or
failure. This is wrong because errno is only set for specific
combinations of the status return value and the h_errno variable.
(cherry picked from commit f4a6be2582b8dfe8adfa68da3dd8decf566b3983)
diff --git a/ChangeLog b/ChangeLog
index 519e56e..96a58d5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
2017-09-01 Florian Weimer <fweimer@redhat.com>
+ [BZ #21915]
+ [BZ #21922]
+ * sysdeps/posix/getaddrinfo.c (gethosts): Look at NSS function
+ result to determine success or failure, not the errno value.
+ * nss/Makefile (tests): Add tst-nss-files-hosts-erange.
+ (tst-nss-files-hosts-erange): Link with -ldl.
+ * nss/tst-nss-files-hosts-erange.c: New file.
+ * nss/tst-resolv-basic.c (response): Handle nodata.example.
+ (do_test): Add NO_DATA tests.
+ * resolv/tst-resolv-basic.c (test_nodata_nxdomain): New function.
+ (do_test): Call it.
+
+2017-09-01 Florian Weimer <fweimer@redhat.com>
+
[BZ #21922]
* sysdeps/posix/getaddrinfo.c (gaih_inet): Report EAI_NODATA error
coming from gethostbyname2_r.
diff --git a/NEWS b/NEWS
index d2636b7..1537957 100644
--- a/NEWS
+++ b/NEWS
@@ -57,6 +57,7 @@ The following bugs are resolved with this release:
[21624] Unsafe alloca allows local attackers to alias stack and heap (CVE-2017-1000366)
[21654] nss: Fix invalid cast in group merging
[21778] Robust mutex may deadlock
+ [21915] getaddrinfo: incorrect result handling for NSS service modules
[21922] getaddrinfo with AF_INET(6) returns EAI_NONAME, not EAI_NODATA
[21972] assert macro requires operator== (int) for its argument type
[22322] libc: [mips64] wrong bits/long-double.h installed
diff --git a/nss/Makefile b/nss/Makefile
index de6c47a..def3860 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -54,6 +54,11 @@ tests = test-netdb tst-nss-test1 test-digits-dots \
$(tests-static)
xtests = bug-erange
+# Tests which need libdl
+ifeq (yes,$(build-shared))
+tests += tst-nss-files-hosts-erange
+endif
+
# If we have a thread library then we can test cancellation against
# some routines like getpwuid_r.
ifeq (yes,$(have-thread-library))
@@ -135,3 +140,5 @@ $(objpfx)tst-nss-test1.out: $(objpfx)/libnss_test1.so$(libnss_test1.so-version)
ifeq (yes,$(have-thread-library))
$(objpfx)tst-cancel-getpwuid_r: $(shared-thread-library)
endif
+
+$(objpfx)tst-nss-files-hosts-erange: $(libdl)
diff --git a/nss/tst-nss-files-hosts-erange.c b/nss/tst-nss-files-hosts-erange.c
new file mode 100644
index 0000000..beb7aa9
--- /dev/null
+++ b/nss/tst-nss-files-hosts-erange.c
@@ -0,0 +1,109 @@
+/* Parse /etc/hosts in multi mode with a trailing long line (bug 21915).
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+
+#include <dlfcn.h>
+#include <errno.h>
+#include <gnu/lib-names.h>
+#include <netdb.h>
+#include <nss.h>
+#include <support/check.h>
+#include <support/check_nss.h>
+#include <support/namespace.h>
+#include <support/test-driver.h>
+#include <support/xunistd.h>
+
+struct support_chroot *chroot_env;
+
+#define X10 "XXXXXXXXXX"
+#define X100 X10 X10 X10 X10 X10 X10 X10 X10 X10 X10
+#define X1000 X100 X100 X100 X100 X100 X100 X100 X100 X100 X100
+
+static void
+prepare (int argc, char **argv)
+{
+ chroot_env = support_chroot_create
+ ((struct support_chroot_configuration)
+ {
+ .resolv_conf = "",
+ .hosts =
+ "127.0.0.1 localhost localhost.localdomain\n"
+ "::1 localhost localhost.localdomain\n"
+ "192.0.2.1 example.com\n"
+ "#" X1000 X100 "\n",
+ .host_conf = "multi on\n",
+ });
+}
+
+static int
+do_test (void)
+{
+ support_become_root ();
+ if (!support_can_chroot ())
+ return EXIT_UNSUPPORTED;
+
+ __nss_configure_lookup ("hosts", "files");
+ if (dlopen (LIBNSS_FILES_SO, RTLD_LAZY) == NULL)
+ FAIL_EXIT1 ("could not load " LIBNSS_DNS_SO ": %s", dlerror ());
+
+ xchroot (chroot_env->path_chroot);
+
+ errno = ERANGE;
+ h_errno = NETDB_INTERNAL;
+ check_hostent ("gethostbyname example.com",
+ gethostbyname ("example.com"),
+ "name: example.com\n"
+ "address: 192.0.2.1\n");
+ errno = ERANGE;
+ h_errno = NETDB_INTERNAL;
+ check_hostent ("gethostbyname2 AF_INET example.com",
+ gethostbyname2 ("example.com", AF_INET),
+ "name: example.com\n"
+ "address: 192.0.2.1\n");
+ {
+ struct addrinfo hints =
+ {
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ };
+ errno = ERANGE;
+ h_errno = NETDB_INTERNAL;
+ struct addrinfo *ai;
+ int ret = getaddrinfo ("example.com", "80", &hints, &ai);
+ check_addrinfo ("example.com AF_UNSPEC", ai, ret,
+ "address: STREAM/TCP 192.0.2.1 80\n");
+ if (ret == 0)
+ freeaddrinfo (ai);
+
+ hints.ai_family = AF_INET;
+ errno = ERANGE;
+ h_errno = NETDB_INTERNAL;
+ ret = getaddrinfo ("example.com", "80", &hints, &ai);
+ check_addrinfo ("example.com AF_INET", ai, ret,
+ "address: STREAM/TCP 192.0.2.1 80\n");
+ if (ret == 0)
+ freeaddrinfo (ai);
+ }
+
+ support_chroot_free (chroot_env);
+ return 0;
+}
+
+#define PREPARE prepare
+#include <support/test-driver.c>
diff --git a/resolv/tst-resolv-basic.c b/resolv/tst-resolv-basic.c
index 3dfa165..66a0e8a 100644
--- a/resolv/tst-resolv-basic.c
+++ b/resolv/tst-resolv-basic.c
@@ -22,6 +22,7 @@
#include <string.h>
#include <support/check.h>
#include <support/check_nss.h>
+#include <support/format_nss.h>
#include <support/resolv_test.h>
#include <support/support.h>
@@ -49,7 +50,7 @@ response (const struct resolv_response_context *ctx,
qname_compare = qname + 2;
else
qname_compare = qname;
- enum {www, alias, nxdomain, long_name} requested_qname;
+ enum {www, alias, nxdomain, long_name, nodata} requested_qname;
if (strcmp (qname_compare, "www.example") == 0)
requested_qname = www;
else if (strcmp (qname_compare, "alias.example") == 0)
@@ -58,6 +59,8 @@ response (const struct resolv_response_context *ctx,
requested_qname = nxdomain;
else if (strcmp (qname_compare, LONG_NAME) == 0)
requested_qname = long_name;
+ else if (strcmp (qname_compare, "nodata.example") == 0)
+ requested_qname = nodata;
else
{
support_record_failure ();
@@ -86,6 +89,8 @@ response (const struct resolv_response_context *ctx,
resolv_response_close_record (b);
resolv_response_open_record (b, "www.example", qclass, qtype, 0);
break;
+ case nodata:
+ return;
case nxdomain:
FAIL_EXIT1 ("unreachable");
}
@@ -204,6 +209,117 @@ check_ai (const char *name, const char *service,
expected);
}
+/* Test for bug 21295: getaddrinfo used to discard address information
+ instead of merging it. */
+static void
+test_bug_21295 (void)
+{
+ /* The address order is unpredictable. There are two factors which
+ contribute to that: The stub resolver does not perform proper
+ response matching for A/AAAA queries (an A response could be
+ associated with an AAAA query and vice versa), and without
+ namespaces, system configuration could affect address
+ ordering. */
+ for (int do_tcp = 0; do_tcp < 2; ++do_tcp)
+ {
+ const struct addrinfo hints =
+ {
+ .ai_family = AF_INET6,
+ .ai_socktype = SOCK_STREAM,
+ .ai_flags = AI_V4MAPPED | AI_ALL,
+ };
+ const char *qname;
+ if (do_tcp)
+ qname = "t.www.example";
+ else
+ qname = "www.example";
+ struct addrinfo *ai = NULL;
+ int ret = getaddrinfo (qname, "80", &hints, &ai);
+ TEST_VERIFY_EXIT (ret == 0);
+
+ const char *expected_a;
+ const char *expected_b;
+ if (do_tcp)
+ {
+ expected_a = "flags: AI_V4MAPPED AI_ALL\n"
+ "address: STREAM/TCP 2001:db8::3 80\n"
+ "address: STREAM/TCP ::ffff:192.0.2.19 80\n";
+ expected_b = "flags: AI_V4MAPPED AI_ALL\n"
+ "address: STREAM/TCP ::ffff:192.0.2.19 80\n"
+ "address: STREAM/TCP 2001:db8::3 80\n";
+ }
+ else
+ {
+ expected_a = "flags: AI_V4MAPPED AI_ALL\n"
+ "address: STREAM/TCP 2001:db8::1 80\n"
+ "address: STREAM/TCP ::ffff:192.0.2.17 80\n";
+ expected_b = "flags: AI_V4MAPPED AI_ALL\n"
+ "address: STREAM/TCP ::ffff:192.0.2.17 80\n"
+ "address: STREAM/TCP 2001:db8::1 80\n";
+ }
+
+ char *actual = support_format_addrinfo (ai, ret);
+ if (!(strcmp (actual, expected_a) == 0
+ || strcmp (actual, expected_b) == 0))
+ {
+ support_record_failure ();
+ printf ("error: %s: unexpected response (TCP: %d):\n%s\n",
+ __func__, do_tcp, actual);
+ }
+ free (actual);
+ freeaddrinfo (ai);
+ }
+}
+
+/* Run tests which do not expect any data. */
+static void
+test_nodata_nxdomain (void)
+{
+ /* Iterate through different address families. */
+ int families[] = { AF_UNSPEC, AF_INET, AF_INET6, -1 };
+ for (int i = 0; families[i] >= 0; ++i)
+ /* If do_tcp, prepend "t." to the name to trigger TCP
+ fallback. */
+ for (int do_tcp = 0; do_tcp < 2; ++do_tcp)
+ /* If do_nxdomain, trigger an NXDOMAIN error (DNS failure),
+ otherwise use a NODATA response (empty but successful
+ answer). */
+ for (int do_nxdomain = 0; do_nxdomain < 2; ++do_nxdomain)
+ {
+ int family = families[i];
+ char *name = xasprintf ("%s%s.example",
+ do_tcp ? "t." : "",
+ do_nxdomain ? "nxdomain" : "nodata");
+
+ if (family != AF_UNSPEC)
+ {
+ if (do_nxdomain)
+ check_h (name, family, "error: HOST_NOT_FOUND\n");
+ else
+ check_h (name, family, "error: NO_ADDRESS\n");
+ }
+
+ const char *expected;
+ if (do_nxdomain)
+ expected = "error: Name or service not known\n";
+ else
+ expected = "error: No address associated with hostname\n";
+
+ check_ai (name, "80", family, expected);
+
+ struct addrinfo hints =
+ {
+ .ai_family = family,
+ .ai_flags = AI_V4MAPPED | AI_ALL,
+ };
+ check_ai_hints (name, "80", hints, expected);
+ hints.ai_flags |= AI_CANONNAME;
+ check_ai_hints (name, "80", hints, expected);
+
+ free (name);
+ }
+}
+
static int
do_test (void)
{
@@ -376,43 +492,8 @@ do_test (void)
"address: DGRAM/UDP 2001:db8::4 80\n"
"address: RAW/IP 2001:db8::4 80\n");
- check_h ("nxdomain.example", AF_INET,
- "error: HOST_NOT_FOUND\n");
- check_h ("nxdomain.example", AF_INET6,
- "error: HOST_NOT_FOUND\n");
- check_ai ("nxdomain.example", "80", AF_UNSPEC,
- "error: Name or service not known\n");
- check_ai ("nxdomain.example", "80", AF_INET,
- "error: Name or service not known\n");
- check_ai ("nxdomain.example", "80", AF_INET6,
- "error: Name or service not known\n");
-
- check_h ("t.nxdomain.example", AF_INET,
- "error: HOST_NOT_FOUND\n");
- check_h ("t.nxdomain.example", AF_INET6,
- "error: HOST_NOT_FOUND\n");
- check_ai ("t.nxdomain.example", "80", AF_UNSPEC,
- "error: Name or service not known\n");
- check_ai ("t.nxdomain.example", "80", AF_INET,
- "error: Name or service not known\n");
- check_ai ("t.nxdomain.example", "80", AF_INET6,
- "error: Name or service not known\n");
-
- /* Test for bug 21295. */
- check_ai_hints ("www.example", "80",
- (struct addrinfo) { .ai_family = AF_INET6,
- .ai_socktype = SOCK_STREAM,
- .ai_flags = AI_V4MAPPED | AI_ALL, },
- "flags: AI_V4MAPPED AI_ALL\n"
- "address: STREAM/TCP 2001:db8::1 80\n"
- "address: STREAM/TCP ::ffff:192.0.2.17 80\n");
- check_ai_hints ("t.www.example", "80",
- (struct addrinfo) { .ai_family = AF_INET6,
- .ai_socktype = SOCK_STREAM,
- .ai_flags = AI_V4MAPPED | AI_ALL, },
- "flags: AI_V4MAPPED AI_ALL\n"
- "address: STREAM/TCP 2001:db8::3 80\n"
- "address: STREAM/TCP ::ffff:192.0.2.19 80\n");
+ test_bug_21295 ();
+ test_nodata_nxdomain ();
resolv_test_end (aux);
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index bcd437c..43cebb5 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -241,26 +241,25 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
#define gethosts(_family, _type) \
{ \
struct hostent th; \
- struct hostent *h; \
char *localcanon = NULL; \
no_data = 0; \
- while (1) { \
- status = DL_CALL_FCT (fct, (name, _family, &th, \
- tmpbuf->data, tmpbuf->length, \
- &errno, &h_errno, NULL, &localcanon)); \
- if (errno != ERANGE || h_errno != NETDB_INTERNAL) \
- break; \
- if (!scratch_buffer_grow (tmpbuf)) \
- { \
- result = -EAI_MEMORY; \
- goto free_and_return; \
- } \
- } \
- if (status == NSS_STATUS_SUCCESS && errno == 0) \
- h = &th; \
- else \
- h = NULL; \
- if (errno != 0) \
+ while (1) \
+ { \
+ status = DL_CALL_FCT (fct, (name, _family, &th, \
+ tmpbuf->data, tmpbuf->length, \
+ &errno, &h_errno, NULL, &localcanon)); \
+ if (status != NSS_STATUS_TRYAGAIN || h_errno != NETDB_INTERNAL \
+ || errno != ERANGE) \
+ break; \
+ if (!scratch_buffer_grow (tmpbuf)) \
+ { \
+ _res.options |= old_res_options & DEPRECATED_RES_USE_INET6; \
+ result = -EAI_MEMORY; \
+ goto free_and_return; \
+ } \
+ } \
+ if (status == NSS_STATUS_NOTFOUND \
+ || status == NSS_STATUS_TRYAGAIN || status == NSS_STATUS_UNAVAIL) \
{ \
if (h_errno == NETDB_INTERNAL) \
{ \
@@ -273,9 +272,9 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
else \
no_data = h_errno == NO_DATA; \
} \
- else if (h != NULL) \
+ else if (status == NSS_STATUS_SUCCESS) \
{ \
- if (!convert_hostent_to_gaih_addrtuple (req, _family,h, &addrmem)) \
+ if (!convert_hostent_to_gaih_addrtuple (req, _family, &th, &addrmem)) \
{ \
_res.options |= old_res_options & DEPRECATED_RES_USE_INET6; \
result = -EAI_SYSTEM; \
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=e3ae300f3f2d1a94709b0f3fed2543b9449a09ca
commit e3ae300f3f2d1a94709b0f3fed2543b9449a09ca
Author: Florian Weimer <fweimer@redhat.com>
Date: Mon Sep 4 11:25:34 2017 +0200
getaddrinfo: Return EAI_NODATA if gethostbyname2_r reports NO_DATA [BZ #21922]
(cherry picked from commit 5f8340f583fe3d4f5734bd2371c5a45ecff2db0d)
diff --git a/ChangeLog b/ChangeLog
index 410d132..519e56e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
2017-09-01 Florian Weimer <fweimer@redhat.com>
+ [BZ #21922]
+ * sysdeps/posix/getaddrinfo.c (gaih_inet): Report EAI_NODATA error
+ coming from gethostbyname2_r.
+
+2017-09-01 Florian Weimer <fweimer@redhat.com>
+
* sysdeps/posix/getaddrinfo.c (gaih_inet): Only use h_errno if
status indicates it is set.
diff --git a/NEWS b/NEWS
index 6bb7dfc..d2636b7 100644
--- a/NEWS
+++ b/NEWS
@@ -57,6 +57,7 @@ The following bugs are resolved with this release:
[21624] Unsafe alloca allows local attackers to alias stack and heap (CVE-2017-1000366)
[21654] nss: Fix invalid cast in group merging
[21778] Robust mutex may deadlock
+ [21922] getaddrinfo with AF_INET(6) returns EAI_NONAME, not EAI_NODATA
[21972] assert macro requires operator== (int) for its argument type
[22322] libc: [mips64] wrong bits/long-double.h installed
[22627] $ORIGIN in $LD_LIBRARY_PATH is substituted twice
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 668f7b7..bcd437c 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -613,6 +613,14 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
*pat = addrmem;
}
+ else
+ {
+ if (h_errno == NO_DATA)
+ result = -EAI_NODATA;
+ else
+ result = -EAI_NONAME;
+ goto free_and_return;
+ }
}
else
{
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=e552550b409fda1369dc8f23c659c554632619e5
commit e552550b409fda1369dc8f23c659c554632619e5
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Sep 1 08:57:52 2017 +0200
getaddrinfo: In gaih_inet, use h_errno for certain status values only
h_errno is not set for NSS_STATUS_SUCCESS, so its value might not be
accurate at this point.
(cherry picked from commit a2881ef01450295782b065f2f850f340d5c12c14)
diff --git a/ChangeLog b/ChangeLog
index 0d09261..410d132 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
2017-09-01 Florian Weimer <fweimer@redhat.com>
+ * sysdeps/posix/getaddrinfo.c (gaih_inet): Only use h_errno if
+ status indicates it is set.
+
+2017-09-01 Florian Weimer <fweimer@redhat.com>
+
* sysdeps/posix/getaddrinfo.c (gaih_inet): Make reporting of NSS
function lookup failures more reliable.
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 65394a3..668f7b7 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -944,7 +944,10 @@ gaih_inet (const char *name, const struct gaih_service *service,
_res.options |= old_res_options & DEPRECATED_RES_USE_INET6;
- if (h_errno == NETDB_INTERNAL)
+ /* If we have a failure which sets errno, report it using
+ EAI_SYSTEM. */
+ if ((status == NSS_STATUS_TRYAGAIN || status == NSS_STATUS_UNAVAIL)
+ && h_errno == NETDB_INTERNAL)
{
result = -EAI_SYSTEM;
goto free_and_return;
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=5515224932751ef13d382b7404fefc8e9c1057f5
commit 5515224932751ef13d382b7404fefc8e9c1057f5
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Sep 1 08:57:28 2017 +0200
getaddrinfo: Properly set errno for NSS function lookup failure
(cherry picked from commit ad816a5e00ce891a2cea8187638fa0e00f83aaf6)
diff --git a/ChangeLog b/ChangeLog
index 1bb6d4c..0d09261 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
2017-09-01 Florian Weimer <fweimer@redhat.com>
+ * sysdeps/posix/getaddrinfo.c (gaih_inet): Make reporting of NSS
+ function lookup failures more reliable.
+
+2017-09-01 Florian Weimer <fweimer@redhat.com>
+
* sysdeps/posix/getaddrinfo.c (gethosts): Use h_errno directly.
(getcanonname): Likewise.
(gaih_inet): Likewise.
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 7984648..65394a3 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -919,13 +919,17 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
else
{
+ /* Could not locate any of the lookup functions.
+ The NSS lookup code does not consistently set
+ errno, so we need to supply our own error
+ code here. The root cause could either be a
+ resource allocation failure, or a missing
+ service function in the DSO (so it should not
+ be listed in /etc/nsswitch.conf). Assume the
+ former, and return EBUSY. */
status = NSS_STATUS_UNAVAIL;
- /* Could not load any of the lookup functions. Indicate
- an internal error if the failure was due to a system
- error other than the file not being found. We use the
- errno from the last failed callback. */
- if (errno != 0 && errno != ENOENT)
- __set_h_errno (NETDB_INTERNAL);
+ __set_h_errno (NETDB_INTERNAL);
+ __set_errno (EBUSY);
}
}
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=dc2d4b0ccd317108e3fa6f77bbbad238b4b01920
commit dc2d4b0ccd317108e3fa6f77bbbad238b4b01920
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Sep 1 08:57:07 2017 +0200
getaddrinfo: Use &h_errno has the h_errno pointer
This simplifies the code because it is not necessary to propagate the
temporary h_errno value to the thread-local variable. It also increases
compatibility with NSS modules which update only one of the two places.
(cherry picked from commit 53250a21b81474ef4e78090a4a9a63d8471e1091)
diff --git a/ChangeLog b/ChangeLog
index 7f728ff..1bb6d4c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
2017-09-01 Florian Weimer <fweimer@redhat.com>
+ * sysdeps/posix/getaddrinfo.c (gethosts): Use h_errno directly.
+ (getcanonname): Likewise.
+ (gaih_inet): Likewise.
+
+2017-09-01 Florian Weimer <fweimer@redhat.com>
+
* sysdeps/posix/getaddrinfo.c (gethosts): Use errno directly.
(getcanonname): Likewise.
(gaih_inet): Likewise.
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index f83e6d7..7984648 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -240,7 +240,6 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
#define gethosts(_family, _type) \
{ \
- int herrno; \
struct hostent th; \
struct hostent *h; \
char *localcanon = NULL; \
@@ -248,8 +247,8 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
while (1) { \
status = DL_CALL_FCT (fct, (name, _family, &th, \
tmpbuf->data, tmpbuf->length, \
- &errno, &herrno, NULL, &localcanon)); \
- if (errno != ERANGE || herrno != NETDB_INTERNAL) \
+ &errno, &h_errno, NULL, &localcanon)); \
+ if (errno != ERANGE || h_errno != NETDB_INTERNAL) \
break; \
if (!scratch_buffer_grow (tmpbuf)) \
{ \
@@ -263,17 +262,16 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
h = NULL; \
if (errno != 0) \
{ \
- if (herrno == NETDB_INTERNAL) \
+ if (h_errno == NETDB_INTERNAL) \
{ \
- __set_h_errno (herrno); \
_res.options |= old_res_options & DEPRECATED_RES_USE_INET6; \
result = -EAI_SYSTEM; \
goto free_and_return; \
} \
- if (herrno == TRY_AGAIN) \
+ if (h_errno == TRY_AGAIN) \
no_data = EAI_AGAIN; \
else \
- no_data = herrno == NO_DATA; \
+ no_data = h_errno == NO_DATA; \
} \
else if (h != NULL) \
{ \
@@ -328,9 +326,8 @@ getcanonname (service_user *nip, struct gaih_addrtuple *at, const char *name)
if (cfct != NULL)
{
char buf[256];
- int herrno;
if (DL_CALL_FCT (cfct, (at->name ?: name, buf, sizeof (buf),
- &s, &errno, &herrno)) != NSS_STATUS_SUCCESS)
+ &s, &errno, &h_errno)) != NSS_STATUS_SUCCESS)
/* If the canonical name cannot be determined, use the passed
string. */
s = (char *) name;
@@ -588,14 +585,13 @@ gaih_inet (const char *name, const struct gaih_service *service,
int rc;
struct hostent th;
struct hostent *h;
- int herrno;
while (1)
{
rc = __gethostbyname2_r (name, AF_INET, &th,
tmpbuf->data, tmpbuf->length,
- &h, &herrno);
- if (rc != ERANGE || herrno != NETDB_INTERNAL)
+ &h, &h_errno);
+ if (rc != ERANGE || h_errno != NETDB_INTERNAL)
break;
if (!scratch_buffer_grow (tmpbuf))
{
@@ -620,12 +616,9 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
else
{
- if (herrno == NETDB_INTERNAL)
- {
- __set_h_errno (herrno);
- result = -EAI_SYSTEM;
- }
- else if (herrno == TRY_AGAIN)
+ if (h_errno == NETDB_INTERNAL)
+ result = -EAI_SYSTEM;
+ else if (h_errno == TRY_AGAIN)
result = -EAI_AGAIN;
else
/* We made requests but they turned out no data.
@@ -648,8 +641,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
{
/* Try to use nscd. */
struct nscd_ai_result *air = NULL;
- int herrno;
- int err = __nscd_getai (name, &air, &herrno);
+ int err = __nscd_getai (name, &air, &h_errno);
if (air != NULL)
{
/* Transform into gaih_addrtuple list. */
@@ -740,9 +732,9 @@ gaih_inet (const char *name, const struct gaih_service *service,
goto free_and_return;
else if (__nss_not_use_nscd_hosts == 0)
{
- if (herrno == NETDB_INTERNAL && errno == ENOMEM)
+ if (h_errno == NETDB_INTERNAL && errno == ENOMEM)
result = -EAI_MEMORY;
- else if (herrno == TRY_AGAIN)
+ else if (h_errno == TRY_AGAIN)
result = -EAI_AGAIN;
else
result = -EAI_SYSTEM;
@@ -784,23 +776,21 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (fct4 != NULL)
{
- int herrno;
-
while (1)
{
status = DL_CALL_FCT (fct4, (name, pat,
tmpbuf->data, tmpbuf->length,
- &errno, &herrno,
+ &errno, &h_errno,
NULL));
if (status == NSS_STATUS_SUCCESS)
break;
if (status != NSS_STATUS_TRYAGAIN
- || errno != ERANGE || herrno != NETDB_INTERNAL)
+ || errno != ERANGE || h_errno != NETDB_INTERNAL)
{
- if (herrno == TRY_AGAIN)
+ if (h_errno == TRY_AGAIN)
no_data = EAI_AGAIN;
else
- no_data = herrno == NO_DATA;
+ no_data = h_errno == NO_DATA;
break;
}
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=196990f97a0a3f28eab25e642f63f1294bf87722
commit 196990f97a0a3f28eab25e642f63f1294bf87722
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Sep 1 08:56:46 2017 +0200
getaddrinfo: Use &errno has the errno pointer
Similar code in nss/getXXbyYY_r.c is already using &errno as the
argument.
(cherry picked from commit 924b121c5978689001ae28cf1c8497371dad4f71)
diff --git a/ChangeLog b/ChangeLog
index 242873b..7f728ff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-09-01 Florian Weimer <fweimer@redhat.com>
+
+ * sysdeps/posix/getaddrinfo.c (gethosts): Use errno directly.
+ (getcanonname): Likewise.
+ (gaih_inet): Likewise.
+
2017-08-08 Florian Weimer <fweimer@redhat.com>
* sysdeps/posix/getaddrinfo.c (gaih_inet): Remove unreachable
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index e63a269..f83e6d7 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -246,11 +246,10 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
char *localcanon = NULL; \
no_data = 0; \
while (1) { \
- rc = 0; \
status = DL_CALL_FCT (fct, (name, _family, &th, \
tmpbuf->data, tmpbuf->length, \
- &rc, &herrno, NULL, &localcanon)); \
- if (rc != ERANGE || herrno != NETDB_INTERNAL) \
+ &errno, &herrno, NULL, &localcanon)); \
+ if (errno != ERANGE || herrno != NETDB_INTERNAL) \
break; \
if (!scratch_buffer_grow (tmpbuf)) \
{ \
@@ -258,11 +257,11 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
goto free_and_return; \
} \
} \
- if (status == NSS_STATUS_SUCCESS && rc == 0) \
+ if (status == NSS_STATUS_SUCCESS && errno == 0) \
h = &th; \
else \
h = NULL; \
- if (rc != 0) \
+ if (errno != 0) \
{ \
if (herrno == NETDB_INTERNAL) \
{ \
@@ -330,9 +329,8 @@ getcanonname (service_user *nip, struct gaih_addrtuple *at, const char *name)
{
char buf[256];
int herrno;
- int rc;
if (DL_CALL_FCT (cfct, (at->name ?: name, buf, sizeof (buf),
- &s, &rc, &herrno)) != NSS_STATUS_SUCCESS)
+ &s, &errno, &herrno)) != NSS_STATUS_SUCCESS)
/* If the canonical name cannot be determined, use the passed
string. */
s = (char *) name;
@@ -348,7 +346,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
const struct gaih_typeproto *tp = gaih_inet_typeproto;
struct gaih_servtuple *st = (struct gaih_servtuple *) &nullserv;
struct gaih_addrtuple *at = NULL;
- int rc;
bool got_ipv6 = false;
const char *canon = NULL;
const char *orig_name = name;
@@ -390,7 +387,8 @@ gaih_inet (const char *name, const struct gaih_service *service,
st = (struct gaih_servtuple *)
alloca_account (sizeof (struct gaih_servtuple), alloca_used);
- if ((rc = gaih_inet_serv (service->name, tp, req, st, tmpbuf)))
+ int rc = gaih_inet_serv (service->name, tp, req, st, tmpbuf);
+ if (__glibc_unlikely (rc != 0))
return rc;
}
else
@@ -490,7 +488,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
idn_flags |= IDNA_USE_STD3_ASCII_RULES;
char *p = NULL;
- rc = __idna_to_ascii_lz (name, &p, idn_flags);
+ int rc = __idna_to_ascii_lz (name, &p, idn_flags);
if (rc != IDNA_SUCCESS)
{
/* No need to jump to free_and_return here. */
@@ -790,15 +788,14 @@ gaih_inet (const char *name, const struct gaih_service *service,
while (1)
{
- rc = 0;
status = DL_CALL_FCT (fct4, (name, pat,
tmpbuf->data, tmpbuf->length,
- &rc, &herrno,
+ &errno, &herrno,
NULL));
if (status == NSS_STATUS_SUCCESS)
break;
if (status != NSS_STATUS_TRYAGAIN
- || rc != ERANGE || herrno != NETDB_INTERNAL)
+ || errno != ERANGE || herrno != NETDB_INTERNAL)
{
if (herrno == TRY_AGAIN)
no_data = EAI_AGAIN;
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=346d7f942d1a0193792a6eedf696d797fd000369
commit 346d7f942d1a0193792a6eedf696d797fd000369
Author: Florian Weimer <fweimer@redhat.com>
Date: Tue Aug 8 18:48:05 2017 +0200
getaddrinfo: Remove unreachable return statement from gaih_inet
(cherry picked from commit 0df595b23a829c9169ec418a19eef9006b4ae801)
diff --git a/ChangeLog b/ChangeLog
index aa0ddaa..242873b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-08-08 Florian Weimer <fweimer@redhat.com>
+
+ * sysdeps/posix/getaddrinfo.c (gaih_inet): Remove unreachable
+ return statement.
+
2017-06-24 Florian Weimer <fweimer@redhat.com>
[BZ #21295]
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index ceb1e0b..e63a269 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -415,13 +415,9 @@ gaih_inet (const char *name, const struct gaih_service *service,
alloca_account (sizeof (struct gaih_servtuple),
alloca_used);
- if ((rc = gaih_inet_serv (service->name,
- tp, req, newp, tmpbuf)))
- {
- if (rc)
- continue;
- return rc;
- }
+ if (gaih_inet_serv (service->name,
+ tp, req, newp, tmpbuf) != 0)
+ continue;
*pst = newp;
pst = &(newp->next);
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=84e7ab5b1ba14d60d0d76bb78217e254fd4615cf
commit 84e7ab5b1ba14d60d0d76bb78217e254fd4615cf
Author: Florian Weimer <fweimer@redhat.com>
Date: Sat Jun 24 16:51:31 2017 +0200
resolv/tst-resolv-basic: Add test cases for bug 21295
(cherry picked from commit 513a71a420e74270a6a9702ec916e807be51350a)
diff --git a/ChangeLog b/ChangeLog
index 1f4b157..aa0ddaa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-24 Florian Weimer <fweimer@redhat.com>
+
+ [BZ #21295]
+ * resolv/tst-resolv-basic.c (do_test): Add new test cases.
+
2017-06-24 Dmitry Bilunov <kmeaw@kmeaw.com>
[BZ #21295]
diff --git a/resolv/tst-resolv-basic.c b/resolv/tst-resolv-basic.c
index 92f912b..3dfa165 100644
--- a/resolv/tst-resolv-basic.c
+++ b/resolv/tst-resolv-basic.c
@@ -398,6 +398,22 @@ do_test (void)
check_ai ("t.nxdomain.example", "80", AF_INET6,
"error: Name or service not known\n");
+ /* Test for bug 21295. */
+ check_ai_hints ("www.example", "80",
+ (struct addrinfo) { .ai_family = AF_INET6,
+ .ai_socktype = SOCK_STREAM,
+ .ai_flags = AI_V4MAPPED | AI_ALL, },
+ "flags: AI_V4MAPPED AI_ALL\n"
+ "address: STREAM/TCP 2001:db8::1 80\n"
+ "address: STREAM/TCP ::ffff:192.0.2.17 80\n");
+ check_ai_hints ("t.www.example", "80",
+ (struct addrinfo) { .ai_family = AF_INET6,
+ .ai_socktype = SOCK_STREAM,
+ .ai_flags = AI_V4MAPPED | AI_ALL, },
+ "flags: AI_V4MAPPED AI_ALL\n"
+ "address: STREAM/TCP 2001:db8::3 80\n"
+ "address: STREAM/TCP ::ffff:192.0.2.19 80\n");
+
resolv_test_end (aux);
return 0;
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=1ae1ef2e0d86d4b308636557122ca7a92a5ace80
commit 1ae1ef2e0d86d4b308636557122ca7a92a5ace80
Author: Dmitry Bilunov <kmeaw@kmeaw.com>
Date: Thu Jan 4 11:33:53 2018 +0100
getaddrinfo: Merge IPv6 addresses and IPv4 addresses [BZ #21295]
(cherry picked from commit 5cf88a83f27b0cd2d5a83511930e40d716c939eb)
diff --git a/ChangeLog b/ChangeLog
index 473f5fd..1f4b157 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-06-24 Dmitry Bilunov <kmeaw@kmeaw.com>
+
+ [BZ #21295]
+ * sysdeps/posix/getaddrinfo.c (convert_hostent_to_gaih_addrtuple):
+ Append addresses at the end of the list.
+
2017-05-11 Florian Weimer <fweimer@redhat.com>
* support/support_format_addrinfo.c (format_ai_flags_1): Renamed
diff --git a/NEWS b/NEWS
index 38bb008..6bb7dfc 100644
--- a/NEWS
+++ b/NEWS
@@ -50,6 +50,7 @@ The following bugs are resolved with this release:
[21242] assert: Suppress pedantic warning caused by statement expression
[21265] x86-64: Use fxsave/xsave/xsavec in _dl_runtime_resolve
[21289] Fix symbol redirect for fts_set
+ [21295] getaddrinfo: Merge IPv6 addresses and IPv4 addresses
[21298] rwlock can deadlock on frequent reader/writer phase switching
[21359] resolv: Support an exactly sized buffer in ns_name_pack
[21386] Assertion in fork for distinct parent PID is incorrect
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 611abc2..ceb1e0b 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -190,16 +190,16 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp,
/* Convert struct hostent to a list of struct gaih_addrtuple objects.
h_name is not copied, and the struct hostent object must not be
- deallocated prematurely. *RESULT must be NULL or a pointer to an
- object allocated using malloc, which is freed. */
+ deallocated prematurely. *RESULT must be NULL or a pointer to a
+ linked-list. The new addresses are appended at the end. */
static bool
convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
int family,
struct hostent *h,
struct gaih_addrtuple **result)
{
- free (*result);
- *result = NULL;
+ while (*result)
+ result = &(*result)->next;
/* Count the number of addresses in h->h_addr_list. */
size_t count = 0;
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=d3f885d7ea9e8a8aa142ccd69e6f85c1a4a70033
commit d3f885d7ea9e8a8aa142ccd69e6f85c1a4a70033
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu May 11 11:32:16 2017 +0200
support_format_addrinfo: Fix flags and canonname formatting
The address family splitting via format_ai_family made unpredictable
the place where the canonname field was printed. This commit adjusts
the implementation so that the ai_flags is checked for consistency
across the list, and ai_canonname must only be present on the first
list element.
Tests for AI_CANONNAME are added to resolv/tst-resolv-basic.
(cherry picked from commit 8ec69bb7ecf3ca5edde5b7d9d7d5d3a5f8b6c405)
diff --git a/ChangeLog b/ChangeLog
index 7717722..473f5fd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2017-05-11 Florian Weimer <fweimer@redhat.com>
+
+ * support/support_format_addrinfo.c (format_ai_flags_1): Renamed
+ from format_ai_flags.
+ (format_ai_flags): New function. Incorporate flag formatting code
+ from format_ai_one.
+ (format_ai_canonname): New function.
+ (format_ai_one): Remove flags parameter.
+ (format_ai_family): Likewise.
+ (support_format_addrinfo): Call format_ai_flags,
+ format_ai_canonname.
+ * resolv/tst-resolv-basic.c (check_ai_hints): Extracted from
+ check_ai.
+ (check_ai): Call check_ai_hints.
+ (do_test): Add AI_CANONNAME tests.
+
2017-04-13 Florian Weimer <fweimer@redhat.com>
[BZ #21359]
diff --git a/resolv/tst-resolv-basic.c b/resolv/tst-resolv-basic.c
index f2b1fc7..92f912b 100644
--- a/resolv/tst-resolv-basic.c
+++ b/resolv/tst-resolv-basic.c
@@ -182,12 +182,12 @@ check_h (const char *name, int family, const char *expected)
}
static void
-check_ai (const char *name, const char *service,
- int family, const char *expected)
+check_ai_hints (const char *name, const char *service,
+ struct addrinfo hints, const char *expected)
{
- struct addrinfo hints = {.ai_family = family};
struct addrinfo *ai;
- char *query = xasprintf ("%s:%s [%d]", name, service, family);
+ char *query = xasprintf ("%s:%s [%d]/0x%x", name, service,
+ hints.ai_family, hints.ai_flags);
int ret = getaddrinfo (name, service, &hints, &ai);
check_addrinfo (query, ai, ret, expected);
if (ret == 0)
@@ -195,6 +195,15 @@ check_ai (const char *name, const char *service,
free (query);
}
+static void
+check_ai (const char *name, const char *service,
+ int family, const char *expected)
+{
+ return check_ai_hints (name, service,
+ (struct addrinfo) { .ai_family = family, },
+ expected);
+}
+
static int
do_test (void)
{
@@ -229,6 +238,17 @@ do_test (void)
"address: STREAM/TCP 2001:db8::1 80\n"
"address: DGRAM/UDP 2001:db8::1 80\n"
"address: RAW/IP 2001:db8::1 80\n");
+ check_ai_hints ("www.example", "80",
+ (struct addrinfo) { .ai_family = AF_UNSPEC,
+ .ai_flags = AI_CANONNAME, },
+ "flags: AI_CANONNAME\n"
+ "canonname: www.example\n"
+ "address: STREAM/TCP 192.0.2.17 80\n"
+ "address: DGRAM/UDP 192.0.2.17 80\n"
+ "address: RAW/IP 192.0.2.17 80\n"
+ "address: STREAM/TCP 2001:db8::1 80\n"
+ "address: DGRAM/UDP 2001:db8::1 80\n"
+ "address: RAW/IP 2001:db8::1 80\n");
check_ai ("alias.example", "80", AF_UNSPEC,
"address: STREAM/TCP 192.0.2.18 80\n"
"address: DGRAM/UDP 192.0.2.18 80\n"
@@ -236,6 +256,17 @@ do_test (void)
"address: STREAM/TCP 2001:db8::2 80\n"
"address: DGRAM/UDP 2001:db8::2 80\n"
"address: RAW/IP 2001:db8::2 80\n");
+ check_ai_hints ("alias.example", "80",
+ (struct addrinfo) { .ai_family = AF_UNSPEC,
+ .ai_flags = AI_CANONNAME, },
+ "flags: AI_CANONNAME\n"
+ "canonname: www.example\n"
+ "address: STREAM/TCP 192.0.2.18 80\n"
+ "address: DGRAM/UDP 192.0.2.18 80\n"
+ "address: RAW/IP 192.0.2.18 80\n"
+ "address: STREAM/TCP 2001:db8::2 80\n"
+ "address: DGRAM/UDP 2001:db8::2 80\n"
+ "address: RAW/IP 2001:db8::2 80\n");
check_ai (LONG_NAME, "80", AF_UNSPEC,
"address: STREAM/TCP 192.0.2.20 80\n"
"address: DGRAM/UDP 192.0.2.20 80\n"
@@ -247,10 +278,26 @@ do_test (void)
"address: STREAM/TCP 192.0.2.17 80\n"
"address: DGRAM/UDP 192.0.2.17 80\n"
"address: RAW/IP 192.0.2.17 80\n");
+ check_ai_hints ("www.example", "80",
+ (struct addrinfo) { .ai_family = AF_INET,
+ .ai_flags = AI_CANONNAME, },
+ "flags: AI_CANONNAME\n"
+ "canonname: www.example\n"
+ "address: STREAM/TCP 192.0.2.17 80\n"
+ "address: DGRAM/UDP 192.0.2.17 80\n"
+ "address: RAW/IP 192.0.2.17 80\n");
check_ai ("alias.example", "80", AF_INET,
"address: STREAM/TCP 192.0.2.18 80\n"
"address: DGRAM/UDP 192.0.2.18 80\n"
"address: RAW/IP 192.0.2.18 80\n");
+ check_ai_hints ("alias.example", "80",
+ (struct addrinfo) { .ai_family = AF_INET,
+ .ai_flags = AI_CANONNAME, },
+ "flags: AI_CANONNAME\n"
+ "canonname: www.example\n"
+ "address: STREAM/TCP 192.0.2.18 80\n"
+ "address: DGRAM/UDP 192.0.2.18 80\n"
+ "address: RAW/IP 192.0.2.18 80\n");
check_ai (LONG_NAME, "80", AF_INET,
"address: STREAM/TCP 192.0.2.20 80\n"
"address: DGRAM/UDP 192.0.2.20 80\n"
@@ -259,10 +306,26 @@ do_test (void)
"address: STREAM/TCP 2001:db8::1 80\n"
"address: DGRAM/UDP 2001:db8::1 80\n"
"address: RAW/IP 2001:db8::1 80\n");
+ check_ai_hints ("www.example", "80",
+ (struct addrinfo) { .ai_family = AF_INET6,
+ .ai_flags = AI_CANONNAME, },
+ "flags: AI_CANONNAME\n"
+ "canonname: www.example\n"
+ "address: STREAM/TCP 2001:db8::1 80\n"
+ "address: DGRAM/UDP 2001:db8::1 80\n"
+ "address: RAW/IP 2001:db8::1 80\n");
check_ai ("alias.example", "80", AF_INET6,
"address: STREAM/TCP 2001:db8::2 80\n"
"address: DGRAM/UDP 2001:db8::2 80\n"
"address: RAW/IP 2001:db8::2 80\n");
+ check_ai_hints ("alias.example", "80",
+ (struct addrinfo) { .ai_family = AF_INET6,
+ .ai_flags = AI_CANONNAME, },
+ "flags: AI_CANONNAME\n"
+ "canonname: www.example\n"
+ "address: STREAM/TCP 2001:db8::2 80\n"
+ "address: DGRAM/UDP 2001:db8::2 80\n"
+ "address: RAW/IP 2001:db8::2 80\n");
check_ai (LONG_NAME, "80", AF_INET6,
"address: STREAM/TCP 2001:db8::4 80\n"
"address: DGRAM/UDP 2001:db8::4 80\n"
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=d8bda0713bd898e9f962cee6d4e3d225441ef5a3
commit d8bda0713bd898e9f962cee6d4e3d225441ef5a3
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Jan 4 11:45:20 2018 +0100
resolv: Support an exactly sized buffer in ns_name_pack [BZ #21359]
This bug did not affect name resolution because those functions
indirectly call ns_name_pack with a buffer which is always larger
than the generated query packet, even in the case of the
longest-possible domain name.
(cherry picked from commit c803cb9b24c6cea15698768e4301e963b98e742c)
diff --git a/ChangeLog b/ChangeLog
index 7c5fdd2..7717722 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2017-04-13 Florian Weimer <fweimer@redhat.com>
+
+ [BZ #21359]
+ * resolv/ns_name.c (ns_name_pack): Do not require an additional
+ byte in the destination buffer. Avoid out-of-bounds pointer
+ arithmetic.
+ * resolv/Makefile (tests): Add tst-ns_name_compress.
+ (tst-ns_name_compress): Link with -lresolv.
+ * resolv/tst-ns_name_compress.c: New file.
+ * resolv/tst-resolv-basic.c (LONG_NAME): Define.
+ (response): Recognize LONG_NAME.
+ (do_test): Add LONG_NAME tests.
+ * resolv/tst-ns_name.c (run_test_case): Fix expected data check
+ for ns_name_unpack. Add tests for ns_name_pton and
+ ns_name_compress.
+
2017-04-04 Florian Weimer <fweimer@redhat.com>
* resolv/tst-ns_name.c, resolv/tst-ns_name.data: New file.
diff --git a/NEWS b/NEWS
index 7c44ba2..38bb008 100644
--- a/NEWS
+++ b/NEWS
@@ -51,6 +51,7 @@ The following bugs are resolved with this release:
[21265] x86-64: Use fxsave/xsave/xsavec in _dl_runtime_resolve
[21289] Fix symbol redirect for fts_set
[21298] rwlock can deadlock on frequent reader/writer phase switching
+ [21359] resolv: Support an exactly sized buffer in ns_name_pack
[21386] Assertion in fork for distinct parent PID is incorrect
[21624] Unsafe alloca allows local attackers to alias stack and heap (CVE-2017-1000366)
[21654] nss: Fix invalid cast in group merging
diff --git a/resolv/Makefile b/resolv/Makefile
index 76e6e3f..c9b4d4d 100644
--- a/resolv/Makefile
+++ b/resolv/Makefile
@@ -45,6 +45,7 @@ tests += \
tst-bug18665-tcp \
tst-inet_pton \
tst-ns_name \
+ tst-ns_name_compress \
tst-res_hconf_reorder \
tst-res_use_inet6 \
tst-resolv-basic \
@@ -134,6 +135,7 @@ $(objpfx)tst-resolv-search: $(objpfx)libresolv.so $(shared-thread-library)
$(objpfx)tst-ns_name: $(objpfx)libresolv.so
$(objpfx)tst-ns_name.out: tst-ns_name.data
+$(objpfx)tst-ns_name_compress: $(objpfx)libresolv.so
# This test case uses the deprecated RES_USE_INET6 resolver option.
diff --git a/resolv/ns_name.c b/resolv/ns_name.c
index 0d76fe5..08a75e2 100644
--- a/resolv/ns_name.c
+++ b/resolv/ns_name.c
@@ -475,7 +475,7 @@ ns_name_pack(const u_char *src, u_char *dst, int dstsiz,
goto cleanup;
}
n = labellen(srcp);
- if (dstp + 1 + n >= eob) {
+ if (n + 1 > eob - dstp) {
goto cleanup;
}
memcpy(dstp, srcp, n + 1);
diff --git a/resolv/tst-ns_name.c b/resolv/tst-ns_name.c
index 66d9a66..65eea4c 100644
--- a/resolv/tst-ns_name.c
+++ b/resolv/tst-ns_name.c
@@ -195,6 +195,7 @@ print_hex (const char *label, struct buffer buffer)
static void
run_test_case (struct test_case *t)
{
+ /* Test ns_name_unpack. */
unsigned char *unpacked = xmalloc (NS_MAXCDNAME);
int consumed = ns_name_unpack
(t->input.data, t->input.data + t->input.length,
@@ -211,16 +212,19 @@ run_test_case (struct test_case *t)
}
if (consumed != -1)
{
- if (memcmp (unpacked, t->unpack_output.data, consumed) != 0)
+ if (memcmp (unpacked, t->unpack_output.data,
+ t->unpack_output.length) != 0)
{
support_record_failure ();
printf ("%s:%zu: error: wrong data from ns_name_unpack\n",
t->path, t->lineno);
print_hex ("expected:", t->unpack_output);
- print_hex ("actual: ", (struct buffer) { unpacked, consumed });
+ print_hex ("actual: ",
+ (struct buffer) { unpacked, t->unpack_output.length });
return;
}
+ /* Test ns_name_ntop. */
char *text = xmalloc (NS_MAXDNAME);
int ret = ns_name_ntop (unpacked, text, NS_MAXDNAME);
if (ret != t->ntop_result)
@@ -243,6 +247,137 @@ run_test_case (struct test_case *t)
printf (" actual: \"%s\"\n", text);
return;
}
+
+ /* Test ns_name_pton. Unpacking does not check the
+ NS_MAXCDNAME limit, but packing does, so we need to
+ adjust the expected result. */
+ int expected;
+ if (t->unpack_output.length > NS_MAXCDNAME)
+ expected = -1;
+ else if (strcmp (text, ".") == 0)
+ /* The root domain is fully qualified. */
+ expected = 1;
+ else
+ /* The domain name is never fully qualified. */
+ expected = 0;
+ unsigned char *repacked = xmalloc (NS_MAXCDNAME);
+ ret = ns_name_pton (text, repacked, NS_MAXCDNAME);
+ if (ret != expected)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong result from ns_name_pton\n"
+ " expected: %d\n"
+ " actual: %d\n",
+ t->path, t->lineno, expected, ret);
+ return;
+ }
+ if (ret >= 0
+ && memcmp (repacked, unpacked, t->unpack_output.length) != 0)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong data from ns_name_pton\n",
+ t->path, t->lineno);
+ print_hex ("expected:", t->unpack_output);
+ print_hex ("actual: ",
+ (struct buffer) { repacked, t->unpack_output.length });
+ return;
+ }
+
+ /* Test ns_name_compress, no compression case. */
+ if (t->unpack_output.length > NS_MAXCDNAME)
+ expected = -1;
+ else
+ expected = t->unpack_output.length;
+ memset (repacked, '$', NS_MAXCDNAME);
+ {
+ enum { ptr_count = 5 };
+ const unsigned char *dnptrs[ptr_count] = { repacked, };
+ ret = ns_name_compress (text, repacked, NS_MAXCDNAME,
+ dnptrs, dnptrs + ptr_count);
+ if (ret != expected)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong result from ns_name_compress\n"
+ " expected: %d\n"
+ " actual: %d\n",
+ t->path, t->lineno, expected, ret);
+ return;
+ }
+ if (ret < 0)
+ {
+ TEST_VERIFY (dnptrs[0] == repacked);
+ TEST_VERIFY (dnptrs[1] == NULL);
+ }
+ else
+ {
+ if (memcmp (repacked, unpacked, t->unpack_output.length) != 0)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong data from ns_name_compress\n",
+ t->path, t->lineno);
+ print_hex ("expected:", t->unpack_output);
+ print_hex ("actual: ", (struct buffer) { repacked, ret });
+ return;
+ }
+ TEST_VERIFY (dnptrs[0] == repacked);
+ if (unpacked[0] == '\0')
+ /* The root domain is not a compression target. */
+ TEST_VERIFY (dnptrs[1] == NULL);
+ else
+ {
+ TEST_VERIFY (dnptrs[1] == repacked);
+ TEST_VERIFY (dnptrs[2] == NULL);
+ }
+ }
+ }
+
+ /* Test ns_name_compress, full compression case. Skip this
+ test for invalid names and the root domain. */
+ if (expected >= 0 && unpacked[0] != '\0')
+ {
+ /* The destination buffer needs additional room for the
+ offset, the initial name, and the compression
+ reference. */
+ enum { name_offset = 259 };
+ size_t target_offset = name_offset + t->unpack_output.length;
+ size_t repacked_size = target_offset + 2;
+ repacked = xrealloc (repacked, repacked_size);
+ memset (repacked, '@', repacked_size);
+ memcpy (repacked + name_offset,
+ t->unpack_output.data, t->unpack_output.length);
+ enum { ptr_count = 5 };
+ const unsigned char *dnptrs[ptr_count]
+ = { repacked, repacked + name_offset, };
+ ret = ns_name_compress
+ (text, repacked + target_offset, NS_MAXCDNAME,
+ dnptrs, dnptrs + ptr_count);
+ if (ret != 2)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong result from ns_name_compress"
+ " (2)\n"
+ " expected: 2\n"
+ " actual: %d\n",
+ t->path, t->lineno, ret);
+ return;
+ }
+ if (memcmp (repacked + target_offset, "\xc1\x03", 2) != 0)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong data from ns_name_compress"
+ " (2)\n"
+ " expected: C103\n",
+ t->path, t->lineno);
+ print_hex ("actual: ",
+ (struct buffer) { repacked + target_offset, ret });
+ return;
+ }
+ TEST_VERIFY (dnptrs[0] == repacked);
+ TEST_VERIFY (dnptrs[1] == repacked + name_offset);
+ TEST_VERIFY (dnptrs[2] == NULL);
+ }
+
+ free (repacked);
}
free (text);
}
diff --git a/resolv/tst-ns_name_compress.c b/resolv/tst-ns_name_compress.c
new file mode 100644
index 0000000..300ba0b
--- /dev/null
+++ b/resolv/tst-ns_name_compress.c
@@ -0,0 +1,75 @@
+/* Test ns_name_compress corner cases.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <resolv.h>
+#include <stdlib.h>
+#include <support/check.h>
+#include <support/support.h>
+
+/* Check that we can process names which fit into the destination
+ buffer exactly. See bug 21359. */
+static void
+test_exact_fit (const char *name, size_t length)
+{
+ unsigned char *buf = xmalloc (length + 1);
+ memset (buf, '$', length + 1);
+ enum { ptr_count = 5 };
+ const unsigned char *dnptrs[ptr_count] = { buf, };
+ int ret = ns_name_compress (name, buf, length,
+ dnptrs, dnptrs + ptr_count);
+ if (ret < 0)
+ {
+ support_record_failure ();
+ printf ("error: ns_name_compress for %s/%zu failed\n", name, length);
+ return;
+ }
+ if ((size_t) ret != length)
+ {
+ support_record_failure ();
+ printf ("error: ns_name_compress for %s/%zu result mismatch: %d\n",
+ name, length, ret);
+ }
+ if (buf[length] != '$')
+ {
+ support_record_failure ();
+ printf ("error: ns_name_compress for %s/%zu padding write\n",
+ name, length);
+ }
+ free (buf);
+}
+
+static int
+do_test (void)
+{
+ test_exact_fit ("abc", 5);
+ test_exact_fit ("abc.", 5);
+ {
+ char long_name[]
+ = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa."
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa."
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa."
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.";
+ TEST_VERIFY (strlen (long_name) == NS_MAXCDNAME - 1);
+ test_exact_fit (long_name, NS_MAXCDNAME);
+ long_name[sizeof (long_name) - 1] = '\0';
+ test_exact_fit (long_name, NS_MAXCDNAME);
+ }
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/resolv/tst-resolv-basic.c b/resolv/tst-resolv-basic.c
index 94b1631..f2b1fc7 100644
--- a/resolv/tst-resolv-basic.c
+++ b/resolv/tst-resolv-basic.c
@@ -25,6 +25,12 @@
#include <support/resolv_test.h>
#include <support/support.h>
+#define LONG_NAME \
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaax." \
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay." \
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaz." \
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaat"
+
static void
response (const struct resolv_response_context *ctx,
struct resolv_response_builder *b,
@@ -43,13 +49,15 @@ response (const struct resolv_response_context *ctx,
qname_compare = qname + 2;
else
qname_compare = qname;
- enum {www, alias, nxdomain} requested_qname;
+ enum {www, alias, nxdomain, long_name} requested_qname;
if (strcmp (qname_compare, "www.example") == 0)
requested_qname = www;
else if (strcmp (qname_compare, "alias.example") == 0)
requested_qname = alias;
else if (strcmp (qname_compare, "nxdomain.example") == 0)
requested_qname = nxdomain;
+ else if (strcmp (qname_compare, LONG_NAME) == 0)
+ requested_qname = long_name;
else
{
support_record_failure ();
@@ -69,6 +77,7 @@ response (const struct resolv_response_context *ctx,
switch (requested_qname)
{
case www:
+ case long_name:
resolv_response_open_record (b, qname, qclass, qtype, 0);
break;
case alias:
@@ -209,6 +218,10 @@ do_test (void)
"name: www.example\n"
"alias: alias.example\n"
"address: 2001:db8::2\n");
+ check_h (LONG_NAME, AF_INET,
+ "name: " LONG_NAME "\n"
+ "address: 192.0.2.20\n");
+
check_ai ("www.example", "80", AF_UNSPEC,
"address: STREAM/TCP 192.0.2.17 80\n"
"address: DGRAM/UDP 192.0.2.17 80\n"
@@ -223,6 +236,13 @@ do_test (void)
"address: STREAM/TCP 2001:db8::2 80\n"
"address: DGRAM/UDP 2001:db8::2 80\n"
"address: RAW/IP 2001:db8::2 80\n");
+ check_ai (LONG_NAME, "80", AF_UNSPEC,
+ "address: STREAM/TCP 192.0.2.20 80\n"
+ "address: DGRAM/UDP 192.0.2.20 80\n"
+ "address: RAW/IP 192.0.2.20 80\n"
+ "address: STREAM/TCP 2001:db8::4 80\n"
+ "address: DGRAM/UDP 2001:db8::4 80\n"
+ "address: RAW/IP 2001:db8::4 80\n");
check_ai ("www.example", "80", AF_INET,
"address: STREAM/TCP 192.0.2.17 80\n"
"address: DGRAM/UDP 192.0.2.17 80\n"
@@ -231,6 +251,10 @@ do_test (void)
"address: STREAM/TCP 192.0.2.18 80\n"
"address: DGRAM/UDP 192.0.2.18 80\n"
"address: RAW/IP 192.0.2.18 80\n");
+ check_ai (LONG_NAME, "80", AF_INET,
+ "address: STREAM/TCP 192.0.2.20 80\n"
+ "address: DGRAM/UDP 192.0.2.20 80\n"
+ "address: RAW/IP 192.0.2.20 80\n");
check_ai ("www.example", "80", AF_INET6,
"address: STREAM/TCP 2001:db8::1 80\n"
"address: DGRAM/UDP 2001:db8::1 80\n"
@@ -239,6 +263,10 @@ do_test (void)
"address: STREAM/TCP 2001:db8::2 80\n"
"address: DGRAM/UDP 2001:db8::2 80\n"
"address: RAW/IP 2001:db8::2 80\n");
+ check_ai (LONG_NAME, "80", AF_INET6,
+ "address: STREAM/TCP 2001:db8::4 80\n"
+ "address: DGRAM/UDP 2001:db8::4 80\n"
+ "address: RAW/IP 2001:db8::4 80\n");
check_h ("t.www.example", AF_INET,
"name: t.www.example\n"
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=dbdcd29e717ecd5217aa1e45a0ffe77a89a3f49b
commit dbdcd29e717ecd5217aa1e45a0ffe77a89a3f49b
Author: Florian Weimer <fweimer@redhat.com>
Date: Tue Apr 4 14:09:56 2017 +0200
resolv: Add test coverage for ns_name_unpack, ns_name_ntop
(cherry picked from commit 07d6f1a3ca990e0e4f93b010605d4d87a3abdf24)
diff --git a/ChangeLog b/ChangeLog
index 16da468..7c5fdd2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2017-04-04 Florian Weimer <fweimer@redhat.com>
+
+ * resolv/tst-ns_name.c, resolv/tst-ns_name.data: New file.
+ * resolv/Makefile (tests): Add tst-ns_name.
+ (tst-ns_name): Link with -lresolv.
+ (tst-ns_name.out): Depend on the input data file.
+
2017-06-21 Florian Weimer <fweimer@redhat.com>
* sysdeps/posix/getaddrinfo.c (gaih_inet): Call __inet_pton_length
diff --git a/resolv/Makefile b/resolv/Makefile
index d46cb30..76e6e3f 100644
--- a/resolv/Makefile
+++ b/resolv/Makefile
@@ -44,6 +44,7 @@ tests += \
tst-bug18665 \
tst-bug18665-tcp \
tst-inet_pton \
+ tst-ns_name \
tst-res_hconf_reorder \
tst-res_use_inet6 \
tst-resolv-basic \
@@ -131,5 +132,9 @@ $(objpfx)tst-resolv-network: $(objpfx)libresolv.so $(shared-thread-library)
$(objpfx)tst-resolv-qtypes: $(objpfx)libresolv.so $(shared-thread-library)
$(objpfx)tst-resolv-search: $(objpfx)libresolv.so $(shared-thread-library)
+$(objpfx)tst-ns_name: $(objpfx)libresolv.so
+$(objpfx)tst-ns_name.out: tst-ns_name.data
+
+
# This test case uses the deprecated RES_USE_INET6 resolver option.
CFLAGS-tst-res_use_inet6.c += -Wno-error
diff --git a/resolv/tst-ns_name.c b/resolv/tst-ns_name.c
new file mode 100644
index 0000000..66d9a66
--- /dev/null
+++ b/resolv/tst-ns_name.c
@@ -0,0 +1,303 @@
+/* Test ns_name-related functions.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* This test program processes the tst-ns_name.data file. */
+
+#include <ctype.h>
+#include <resolv.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/xstdio.h>
+
+/* A byte buffer and its length. */
+struct buffer
+{
+ unsigned char *data;
+ size_t length;
+};
+
+/* Convert a base64-encoded string to its binary representation. */
+static bool
+base64_to_buffer (const char *base64, struct buffer *result)
+{
+ /* "-" denotes an empty input. */
+ if (strcmp (base64, "-") == 0)
+ {
+ result->data = xmalloc (1);
+ result->length = 0;
+ return true;
+ }
+
+ size_t size = strlen (base64);
+ unsigned char *data = xmalloc (size);
+ int ret = b64_pton (base64, data, size);
+ if (ret < 0 || ret > size)
+ return false;
+ result->data = xrealloc (data, ret);
+ result->length = ret;
+ return true;
+}
+
+/* A test case for ns_name_unpack and ns_name_ntop. */
+struct test_case
+{
+ char *path;
+ size_t lineno;
+ struct buffer input;
+ size_t input_offset;
+ int unpack_result;
+ struct buffer unpack_output;
+ int ntop_result;
+ char *ntop_text;
+};
+
+/* Deallocate the buffers associated with the test case. */
+static void
+free_test_case (struct test_case *t)
+{
+ free (t->path);
+ free (t->input.data);
+ free (t->unpack_output.data);
+ free (t->ntop_text);
+}
+
+/* Extract the test case information from a test file line. */
+static bool
+parse_test_case (const char *path, size_t lineno, const char *line,
+ struct test_case *result)
+{
+ memset (result, 0, sizeof (*result));
+ result->path = xstrdup (path);
+ result->lineno = lineno;
+ result->ntop_result = -1;
+ char *input = NULL;
+ char *unpack_output = NULL;
+ int ret = sscanf (line, "%ms %zu %d %ms %d %ms",
+ &input, &result->input_offset,
+ &result->unpack_result, &unpack_output,
+ &result->ntop_result, &result->ntop_text);
+ if (ret < 3)
+ {
+ printf ("%s:%zu: error: missing input fields\n", path, lineno);
+ free (input);
+ return false;
+ }
+ if (!base64_to_buffer (input, &result->input))
+ {
+ printf ("%s:%zu: error: malformed base64 input data\n", path, lineno);
+ free (input);
+ free (unpack_output);
+ free (result->ntop_text);
+ return false;
+ }
+ free (input);
+
+ if (unpack_output == NULL)
+ result->unpack_output = (struct buffer) { NULL, 0 };
+ else if (!base64_to_buffer (unpack_output, &result->unpack_output))
+ {
+ printf ("%s:%zu: error: malformed base64 unpack data\n", path, lineno);
+ free (result->input.data);
+ free (unpack_output);
+ free (result->ntop_text);
+ return false;
+ }
+ free (unpack_output);
+
+ /* At this point, all allocated buffers have been transferred to
+ *result. */
+
+ if (result->input_offset > result->input.length)
+ {
+ printf ("%s:%zu: error: input offset %zu exceeds buffer size %zu\n",
+ path, lineno, result->input_offset, result->input.length);
+ free_test_case (result);
+ return false;
+ }
+ if (result->unpack_result < -1)
+ {
+ printf ("%s:%zu: error: invalid unpack result %d\n",
+ path, lineno, result->unpack_result);
+ free_test_case (result);
+ return false;
+ }
+ if (result->ntop_result < -1)
+ {
+ printf ("%s:%zu: error: invalid ntop result %d\n",
+ path, lineno, result->ntop_result);
+ free_test_case (result);
+ return false;
+ }
+
+ bool fields_consistent;
+ switch (ret)
+ {
+ case 3:
+ fields_consistent = result->unpack_result == -1;
+ break;
+ case 5:
+ fields_consistent = result->unpack_result != -1
+ && result->ntop_result == -1;
+ break;
+ case 6:
+ fields_consistent = result->unpack_result != -1
+ && result->ntop_result != -1;
+ break;
+ default:
+ fields_consistent = false;
+ }
+ if (!fields_consistent)
+ {
+ printf ("%s:%zu: error: wrong number of fields: %d\n",
+ path, lineno, ret);
+ free_test_case (result);
+ return false;
+ }
+ return true;
+}
+
+/* Format the buffer as a hexadecimal string and write it to standard
+ output. */
+static void
+print_hex (const char *label, struct buffer buffer)
+{
+ printf (" %s ", label);
+ unsigned char *p = buffer.data;
+ unsigned char *end = p + buffer.length;
+ while (p < end)
+ {
+ printf ("%02X", *p & 0xFF);
+ ++p;
+ }
+ putchar ('\n');
+}
+
+/* Run the test case specified in *T. */
+static void
+run_test_case (struct test_case *t)
+{
+ unsigned char *unpacked = xmalloc (NS_MAXCDNAME);
+ int consumed = ns_name_unpack
+ (t->input.data, t->input.data + t->input.length,
+ t->input.data + t->input_offset,
+ unpacked, NS_MAXCDNAME);
+ if (consumed != t->unpack_result)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong result from ns_name_unpack\n"
+ " expected: %d\n"
+ " actual: %d\n",
+ t->path, t->lineno, t->unpack_result, consumed);
+ return;
+ }
+ if (consumed != -1)
+ {
+ if (memcmp (unpacked, t->unpack_output.data, consumed) != 0)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong data from ns_name_unpack\n",
+ t->path, t->lineno);
+ print_hex ("expected:", t->unpack_output);
+ print_hex ("actual: ", (struct buffer) { unpacked, consumed });
+ return;
+ }
+
+ char *text = xmalloc (NS_MAXDNAME);
+ int ret = ns_name_ntop (unpacked, text, NS_MAXDNAME);
+ if (ret != t->ntop_result)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong result from ns_name_top\n"
+ " expected: %d\n"
+ " actual: %d\n",
+ t->path, t->lineno, t->ntop_result, ret);
+ return;
+ }
+ if (ret != -1)
+ {
+ if (strcmp (text, t->ntop_text) != 0)
+ {
+ support_record_failure ();
+ printf ("%s:%zu: error: wrong data from ns_name_ntop\n",
+ t->path, t->lineno);
+ printf (" expected: \"%s\"\n", t->ntop_text);
+ printf (" actual: \"%s\"\n", text);
+ return;
+ }
+ }
+ free (text);
+ }
+ free (unpacked);
+}
+
+/* Open the file at PATH, parse the test cases contained in it, and
+ run them. */
+static void
+run_test_file (const char *path)
+{
+ FILE *fp = xfopen (path, "re");
+ char *line = NULL;
+ size_t line_allocated = 0;
+ size_t lineno = 0;
+
+ while (true)
+ {
+ ssize_t ret = getline (&line, &line_allocated, fp);
+ if (ret < 0)
+ {
+ if (ferror (fp))
+ {
+ printf ("%s: error reading file: %m\n", path);
+ exit (1);
+ }
+ TEST_VERIFY (feof (fp));
+ break;
+ }
+
+ ++lineno;
+ char *p = line;
+ while (isspace (*p))
+ ++p;
+ if (*p == '\0' || *p == '#')
+ continue;
+
+ struct test_case test_case;
+ if (!parse_test_case (path, lineno, line, &test_case))
+ {
+ support_record_failure ();
+ continue;
+ }
+ run_test_case (&test_case);
+ free_test_case (&test_case);
+ }
+ free (line);
+ xfclose (fp);
+}
+
+static int
+do_test (void)
+{
+ run_test_file ("tst-ns_name.data");
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/resolv/tst-ns_name.data b/resolv/tst-ns_name.data
new file mode 100644
index 0000000..0ff0dc3
--- /dev/null
+++ b/resolv/tst-ns_name.data
@@ -0,0 +1,548 @@
+# Test input for ns_name_unpack and ns_name_ntop.
+# Copyright (C) 2017 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+#
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+# This file contains test input and expected output for the
+# ns_name_unpack and ns_name_ntop functions. Empty lines and comments
+# (lines starting with #) are ignored. Test data lines have the
+# following format:
+#
+# INPUT INPUT-OFFSET UNPACK-RESULT UNPACK-OUTPUT NTOP-RESULT NTOP-OUTPUT
+#
+# INPUT, UNPACK-OUTPUT are base64-encoded binary blobs. INPUT-OFFSET,
+# UNPACK-RESULT, NTOP-RESULT are signed integers. NTOP-OUTPUT is an
+# ASCII string (without spaces). If UNPACK-RESULT or NTOP-RESULT are
+# -1, the fields after that are missing (-1 is an error code, so the
+# output buffer is undefined).
+
+# First some manually-crafted test cases.
+
+# bytes-1
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 0 -1
+# bytes-1a
+AQABAQECAQMBBAEFAQYBBwEIAQkBCgELAQwBDQEOAQ8BEAERARIBEwEUARUBFgEXARgBGQEaARsBHAEdAR4BHwEgASEBIgEjASQBJQEmAScBKAEpASoBKwEsAS0BLgEvATABMQEyATMBNAE1ATYBNwE4ATkBOgE7ATwBPQE+AT8A 0 129 AQABAQECAQMBBAEFAQYBBwEIAQkBCgELAQwBDQEOAQ8BEAERARIBEwEUARUBFgEXARgBGQEaARsBHAEdAR4BHwEgASEBIgEjASQBJQEmAScBKAEpASoBKwEsAS0BLgEvATABMQEyATMBNAE1ATYBNwE4ATkBOgE7ATwBPQE+AT8A 233 \000.\001.\002.\003.\004.\005.\006.\007.\008.\009.\010.\011.\012.\013.\014.\015.\016.\017.\018.\019.\020.\021.\022.\023.\024.\025.\026.\027.\028.\029.\030.\031.\032.!.\".#.\$.%.&.'.\(.\).*.+.,.-.\../.0.1.2.3.4.5.6.7.8.9.:.\;.<.=.>.?
+# bytes-1b
+AUABQQFCAUMBRAFFAUYBRwFIAUkBSgFLAUwBTQFOAU8BUAFRAVIBUwFUAVUBVgFXAVgBWQFaAVsBXAFdAV4BXwFgAWEBYgFjAWQBZQFmAWcBaAFpAWoBawFsAW0BbgFvAXABcQFyAXMBdAF1AXYBdwF4AXkBegF7AXwBfQF+AX8A 0 129 AUABQQFCAUMBRAFFAUYBRwFIAUkBSgFLAUwBTQFOAU8BUAFRAVIBUwFUAVUBVgFXAVgBWQFaAVsBXAFdAV4BXwFgAWEBYgFjAWQBZQFmAWcBaAFpAWoBawFsAW0BbgFvAXABcQFyAXMBdAF1AXYBdwF4AXkBegF7AXwBfQF+AX8A 133 \@.A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.U.V.W.X.Y.Z.[.\\.].^._.`.a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.w.x.y.z.{.|.}.~.\127
+# bytes-1c
+AYABgQGCAYMBhAGFAYYBhwGIAYkBigGLAYwBjQGOAY8BkAGRAZIBkwGUAZUBlgGXAZgBmQGaAZsBnAGdAZ4BnwGgAaEBogGjAaQBpQGmAacBqAGpAaoBqwGsAa0BrgGvAbABsQGyAbMBtAG1AbYBtwG4AbkBugG7AbwBvQG+Ab8A 0 129 AYABgQGCAYMBhAGFAYYBhwGIAYkBigGLAYwBjQGOAY8BkAGRAZIBkwGUAZUBlgGXAZgBmQGaAZsBnAGdAZ4BnwGgAaEBogGjAaQBpQGmAacBqAGpAaoBqwGsAa0BrgGvAbABsQGyAbMBtAG1AbYBtwG4AbkBugG7AbwBvQG+Ab8A 320 \128.\129.\130.\131.\132.\133.\134.\135.\136.\137.\138.\139.\140.\141.\142.\143.\144.\145.\146.\147.\148.\149.\150.\151.\152.\153.\154.\155.\156.\157.\158.\159.\160.\161.\162.\163.\164.\165.\166.\167.\168.\169.\170.\171.\172.\173.\174.\175.\176.\177.\178.\179.\180.\181.\182.\183.\184.\185.\186.\187.\188.\189.\190.\191
+# bytes-1d
+AcABwQHCAcMBxAHFAcYBxwHIAckBygHLAcwBzQHOAc8B0AHRAdIB0wHUAdUB1gHXAdgB2QHaAdsB3AHdAd4B3wHgAeEB4gHjAeQB5QHmAecB6AHpAeoB6wHsAe0B7gHvAfAB8QHyAfMB9AH1AfYB9wH4AfkB+gH7AfwB/QH+Af8A 0 129 AcABwQHCAcMBxAHFAcYBxwHIAckBygHLAcwBzQHOAc8B0AHRAdIB0wHUAdUB1gHXAdgB2QHaAdsB3AHdAd4B3wHgAeEB4gHjAeQB5QHmAecB6AHpAeoB6wHsAe0B7gHvAfAB8QHyAfMB9AH1AfYB9wH4AfkB+gH7AfwB/QH+Af8A 320 \192.\193.\194.\195.\196.\197.\198.\199.\200.\201.\202.\203.\204.\205.\206.\207.\208.\209.\210.\211.\212.\213.\214.\215.\216.\217.\218.\219.\220.\221.\222.\223.\224.\225.\226.\227.\228.\229.\230.\231.\232.\233.\234.\235.\236.\237.\238.\239.\240.\241.\242.\243.\244.\245.\246.\247.\248.\249.\250.\251.\252.\253.\254.\255
+# bytes-4
+BAABAgMEBAUGBwQICQoLBAwNDg8EEBESEwQUFRYXBBgZGhsEHB0eHwQgISIjBCQlJicEKCkqKwQsLS4vBDAxMjMENDU2NwQ4OTo7BDw9Pj8EQEFCQwRERUZHBEhJSksETE1OTwRQUVJTBFRVVlcEWFlaWwRcXV5fBGBhYmMEZGVmZwRoaWprBGxtbm8EcHFycwR0dXZ3BHh5ensEfH1+fwSAgYKDBISFhocEiImKiwSMjY6PBJCRkpMElJWWlwSYmZqbBJydnp8EoKGiowSkpaanBKipqqsErK2urwSwsbKzBLS1trcEuLm6uwS8vb6/BMDBwsMExMXGxwTIycrLBMzNzs8E0NHS0wTU1dbXBNjZ2tsE3N3e3wTg4eLjBOTl5ucE6Onq6wTs7e7vBPDx8vME9PX29wT4+fr7BPz9/v8A 0 -1
+# bytes-4a
+BAABAgMEBAUGBwQICQoLBAwNDg8EEBESEwQUFRYXBBgZGhsEHB0eHwQgISIjBCQlJicEKCkqKwQsLS4vBDAxMjMENDU2NwQ4OTo7BDw9Pj8A 0 81 BAABAgMEBAUGBwQICQoLBAwNDg8EEBESEwQUFRYXBBgZGhsEHB0eHwQgISIjBCQlJicEKCkqKwQsLS4vBDAxMjMENDU2NwQ4OTo7BDw9Pj8A 185 \000\001\002\003.\004\005\006\007.\008\009\010\011.\012\013\014\015.\016\017\018\019.\020\021\022\023.\024\025\026\027.\028\029\030\031.\032!\"#.\$%&'.\(\)*+.,-\./.0123.4567.89:\;.<=>?
+# bytes-4b
+BEBBQkMEREVGRwRISUpLBExNTk8EUFFSUwRUVVZXBFhZWlsEXF1eXwRgYWJjBGRlZmcEaGlqawRsbW5vBHBxcnMEdHV2dwR4eXp7BHx9fn8A 0 81 BEBBQkMEREVGRwRISUpLBExNTk8EUFFSUwRUVVZXBFhZWlsEXF1eXwRgYWJjBGRlZmcEaGlqawRsbW5vBHBxcnMEdHV2dwR4eXp7BHx9fn8A 85 \@ABC.DEFG.HIJK.LMNO.PQRS.TUVW.XYZ[.\\]^_.`abc.defg.hijk.lmno.pqrs.tuvw.xyz{.|}~\127
+# bytes-4c
+BICBgoMEhIWGhwSIiYqLBIyNjo8EkJGSkwSUlZaXBJiZmpsEnJ2enwSgoaKjBKSlpqcEqKmqqwSsra6vBLCxsrMEtLW2twS4ubq7BLy9vr8A 0 81 BICBgoMEhIWGhwSIiYqLBIyNjo8EkJGSkwSUlZaXBJiZmpsEnJ2enwSgoaKjBKSlpqcEqKmqqwSsra6vBLCxsrMEtLW2twS4ubq7BLy9vr8A 272 \128\129\130\131.\132\133\134\135.\136\137\138\139.\140\141\142\143.\144\145\146\147.\148\149\150\151.\152\153\154\155.\156\157\158\159.\160\161\162\163.\164\165\166\167.\168\169\170\171.\172\173\174\175.\176\177\178\179.\180\181\182\183.\184\185\186\187.\188\189\190\191
+# bytes-4d
+BMDBwsMExMXGxwTIycrLBMzNzs8E0NHS0wTU1dbXBNjZ2tsE3N3e3wTg4eLjBOTl5ucE6Onq6wTs7e7vBPDx8vME9PX29wT4+fr7BPz9/v8A 0 81 BMDBwsMExMXGxwTIycrLBMzNzs8E0NHS0wTU1dbXBNjZ2tsE3N3e3wTg4eLjBOTl5ucE6Onq6wTs7e7vBPDx8vME9PX29wT4+fr7BPz9/v8A 272 \192\193\194\195.\196\197\198\199.\200\201\202\203.\204\205\206\207.\208\209\210\211.\212\213\214\215.\216\217\218\219.\220\221\222\223.\224\225\226\227.\228\229\230\231.\232\233\234\235.\236\237\238\239.\240\241\242\243.\244\245\246\247.\248\249\250\251.\252\253\254\255
+# bytes-63
+PwABAgMEBQYHCAkKCwwNDg8QERITFBUWFxgZGhscHR4fICEiIyQlJicoKSorLC0uLzAxMjM0NTY3ODk6Ozw9Pj8/QEFCQ0RFRkdISUpLTE1OT1BRUlNUVVZXWFlaW1xdXl9gYWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXp7fH0/fn+AgYKDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmqq6ytrq+wsbKztLW2t7i5uru8P72+v8DBwsPExcbHyMnKy8zNzs/Q0dLT1NXW19jZ2tvc3d7f4OHi4+Tl5ufo6err7O3u7/Dx8vP09fb3+Pn6+wT8/f7/AA== 0 -1
+# bytes-63a
+PwABAgMEBQYHCAkKCwwNDg8QERITFBUWFxgZGhscHR4fICEiIyQlJicoKSorLC0uLzAxMjM0NTY3ODk6Ozw9PgE/AA== 0 67 PwABAgMEBQYHCAkKCwwNDg8QERITFBUWFxgZGhscHR4fICEiIyQlJicoKSorLC0uLzAxMjM0NTY3ODk6Ozw9PgE/AA== 171 \000\001\002\003\004\005\006\007\008\009\010\011\012\013\014\015\016\017\018\019\020\021\022\023\024\025\026\027\028\029\030\031\032!\"#\$%&'\(\)*+,-\./0123456789:\;<=>.?
+# bytes-63b
+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fgF/AA== 0 67 P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fgF/AA== 71 \@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~.\127
+# bytes-63c
+P4CBgoOEhYaHiImKi4yNjo+QkZKTlJWWl5iZmpucnZ6foKGio6SlpqeoqaqrrK2ur7CxsrO0tba3uLm6u7y9vgG/AA== 0 67 P4CBgoOEhYaHiImKi4yNjo+QkZKTlJWWl5iZmpucnZ6foKGio6SlpqeoqaqrrK2ur7CxsrO0tba3uLm6u7y9vgG/AA== 258 \128\129\130\131\132\133\134\135\136\137\138\139\140\141\142\143\144\145\146\147\148\149\150\151\152\153\154\155\156\157\158\159\160\161\162\163\164\165\166\167\168\169\170\171\172\173\174\175\176\177\178\179\180\181\182\183\184\185\186\187\188\189\190.\191
+# bytes-63d
+P8DBwsPExcbHyMnKy8zNzs/Q0dLT1NXW19jZ2tvc3d7f4OHi4+Tl5ufo6err7O3u7/Dx8vP09fb3+Pn6+/z9/gH/AA== 0 67 P8DBwsPExcbHyMnKy8zNzs/Q0dLT1NXW19jZ2tvc3d7f4OHi4+Tl5ufo6err7O3u7/Dx8vP09fb3+Pn6+/z9/gH/AA== 258 \192\193\194\195\196\197\198\199\200\201\202\203\204\205\206\207\208\209\210\211\212\213\214\215\216\217\218\219\220\221\222\223\224\225\226\227\228\229\230\231\232\233\234\235\236\237\238\239\240\241\242\243\244\245\246\247\248\249\250\251\252\253\254.\255
+# compression-loop
+wAA= 0 -1
+# compression-loop-2
+wALAAA== 0 -1
+# empty
+- 0 -1
+# root
+AA== 0 1 AA== 2 .
+# truncated-compression
+wA== 0 -1
+# www
+A3d3dwA= 0 5 A3d3dwA= 4 www
+# www-truncated
+A3d3dw== 0 -1
+# www-truncated-2
+A3d3 0 -1
+# www.example.com
+5jrGq8kVxMt3ZS3RA3d3dwdleGFtcGxlA2NvbQA= 12 17 A3d3dwdleGFtcGxlA2NvbQA= 16 www.example.com
+# www.example.com-answer
+5jrGq8kVxMt3ZS3RA3d3dwdleGFtcGxlA2NvbQAAAQABwAw= 33 2 A3d3dwdleGFtcGxlA2NvbQA= 16 www.example.com
+# www.example.com-answer-truncated
+5jrGq8kVxMt3ZS3RA3d3dwdleGFtcGxlA2NvbQAAAQABwA== 33 -1
+# www.example.com-truncated
+5jrGq8kVxMt3ZS3RA3d3dwdleGFtcGw= 12 -1
+# www1.example.com-answer
+5jrGq8kVxMt3ZS3RA3d3dwdleGFtcGxlA2NvbQAAAQABBHd3dzHAEA== 33 7 BHd3dzEHZXhhbXBsZQNjb20A 17 www1.example.com
+
+# Then test cases derived from the above by American Fuzzy Lop (AFL).
+BAABAgMEBAUGBwQICQoLAAwN 0 16 BAABAgMEBAUGBwQICQoLAA== 51 \000\001\002\003.\004\005\006\007.\008\009\010\011
+PwABAgMEBQYHCAmztLUAABYXGBmInAoLDA0ODyQRNDU2NwE5Ojs8PT4/PwkKCwwNDg8kSwoLDA0ODyQpKSkpKSkpPT4/VTAxMjM0NDY3AYeLjCspCSkpKSkpKSkpKSkpZCcoKSorLC0uPD0+Pz9AQUJDREVGLzAxMjM0NDY3AYoEAKytrq8= 0 -1
+BOgAAMAfNjY2wsLCwsLCwsLCwp/CwsLCwsI2NiQVNjQ2NjY2NjY2AAAAAQAbZxU2AAQ2NjY2Ngk2NjY2NIBYNgAQATY2NjY0/zY2NjYAAADeAzY2NjY2NjY2NjY2NjYAAAABABtn6gABbEtLS0tpS0sBNr52dnZ2H0YUADY2NgAANjYkNjY0/382NjY2NjYVNjZPNjY2NjYkNjb//4AAdnZ2dnZ2dv8LAED/NjY2NjQ2ADwBAAEAgAAAATY2ClA2NtDO0NDQ0NDQ0DPQ0OLQ0NAAAAD7EBQUNjYAAdDQkAAAFBQUFDY2gAEAAAFYKzY2NjY2dnZ2dnZ2QEBAAAAAAQAb 0 255 BOgAAMAfNjY2wsLCwsLCwsLCwp/CwsLCwsI2NiQVNjQ2NjY2NjY2AAAAAQAbZxU2AAQ2NjY2Ngk2NjY2NIBYNgAQATY2NjY0/zY2NjYAAADeAzY2NjY2NjY2NjY2NjYAAAABABtn6gABbEtLS0tpS0sBNr52dnZ2H0YUADY2NgAANjYkNjY0/382NjY2NjYVNjZPNjY2NjYkNjb//4AAdnZ2dnZ2dv8LAED/NjY2NjQ2ADwBAAEAgAAAATY2ClA2NtDO0NDQ0NDQ0DPQ0OLQ0NAAAAD7EBQUNjYAAdDQkAAAFBQUFDY2gAEAAAFYKzY2NjY2dnZ2dnZ2QEBAAAAA 618 \232\000\000\192.666\194\194\194\194\194\194\194\194\194\194\159\194\194\194\194\194\19466\$\0216466666.6\000\000\000\001\000\027g\0216\000\00466666\00966664\128X6\000\016\00166664\2556666\000\000\000\222\0036666666666.66\000\000\000\001\000\027g\234\000\001lKKKKiKK\0016\190vvvv\031F\020\000666\000\00066\$664\255\127666666\02166O.6666\$66\255\255\128\000vvvvvvv\255\011\000\@\255666646\000<\001\000\001\000\128\000\000\00166\010P66\208\206\208\208\208\208\208\208\208.\208\208\226\208\208\208\000\000\000\251\016\020\02066\000\001\208\208\144\000\000\020\020\020\02066\128\001\000\000\001X+66666vvvvvv\@\@\@\000\000
+BOgAAMAfNjY2wsLCwsLCwsLCwp/CwsLCwsI2NiQVNjQ2NjY2NjY2AAAAAQAbZxU2AAQ2NjY2Ngk2NjY2NIBYNgAQATY2NjY0/zY2NjYAAADeAzY2NjY2NjY2NjY2NjYAAAABABtn6gABbEtLS0tpS0sBNr52dnZ2H0YUADY2NgAANjYkNjY0/382NjY2NjYVNjZPNjY2NjYkNjb//4AAdnZ2dnZ2dv8LAED/NjY2NjQ2AA8BAAEAgAAAATY2ClA2NtDO0NDQ0NDQ0DPQ0OLQ0NAAAAD7EBQUNjYAAdDQkAAAFBQUFDY2gAEAAAFYKzY2NjY2dnZ2dnZ2QEBAAAAAAQAb 0 255 BOgAAMAfNjY2wsLCwsLCwsLCwp/CwsLCwsI2NiQVNjQ2NjY2NjY2AAAAAQAbZxU2AAQ2NjY2Ngk2NjY2NIBYNgAQATY2NjY0/zY2NjYAAADeAzY2NjY2NjY2NjY2NjYAAAABABtn6gABbEtLS0tpS0sBNr52dnZ2H0YUADY2NgAANjYkNjY0/382NjY2NjYVNjZPNjY2NjYkNjb//4AAdnZ2dnZ2dv8LAED/NjY2NjQ2AA8BAAEAgAAAATY2ClA2NtDO0NDQ0NDQ0DPQ0OLQ0NAAAAD7EBQUNjYAAdDQkAAAFBQUFDY2gAEAAAFYKzY2NjY2dnZ2dnZ2QEBAAAAA 621 \232\000\000\192.666\194\194\194\194\194\194\194\194\194\194\159\194\194\194\194\194\19466\$\0216466666.6\000\000\000\001\000\027g\0216\000\00466666\00966664\128X6\000\016\00166664\2556666\000\000\000\222\0036666666666.66\000\000\000\001\000\027g\234\000\001lKKKKiKK\0016\190vvvv\031F\020\000666\000\00066\$664\255\127666666\02166O.6666\$66\255\255\128\000vvvvvvv\255\011\000\@\255666646\000\015\001\000\001\000\128\000\000\00166\010P66\208\206\208\208\208\208\208\208\208.\208\208\226\208\208\208\000\000\000\251\016\020\02066\000\001\208\208\144\000\000\020\020\020\02066\128\001\000\000\001X+66666vvvvvv\@\@\@\000\000
+BOgAAMAfNjY2wsLCwsLCwsLCwp/CwsLCwsI2NiQVNjQ2NjY2NjY2AAAAAQAbZxU2AAQ2NjY2Ngk2NjY2NIBYNgAQATY2NjY0/zY2NjYAAADeAzY2NjY2NjY2NjbJNjYAAAABABtn6gABbEtLS0tpS0sBNr52dnZ2H0YUADY2NgAANjYkNjY0/382NjY2NjYVNjZPNjY2NjYkNjb//4AAdnZ2dnZ2dv8LAED/NjY2NjQ2AAABAAEAgAAAATY2ClA2NtDO0NDQ0NDQ0DPQ0OLQ0NAAAAD7EBQUNjYAAdDQkAAAFBQUFDY2gAEAAAFYKzY2NjY2dnZ2dnZ2QEBAAAAAAQAb 0 -1
+BOgAAMAfNjY2wsLCwsLCwsLCwp/CwsLCwsI2NiQVNjQ2NjY2NjY2AAAAAQAbZxU2AAQ2NjY2Ngk2NjY2NIBYNgAQATY2NjY0/zY2NjYAAADeAzY2NjY2NjY2NjY2NskAAAABABtn6gABbEtLS0tpS0sBNr52dnZ2H0YUADY2NgAANjYkNjY0/382NjY2NjYVNjZPNjY2NjYkNjb//4AAdnZ2dnZ2dv8LAED/NjY2NjQ2AAABAAEAgAAAATY2ClA2NtDO0NDQ0NDQ0DPQ0OLQ0NAAAAD7EBQUNjYAAdDQkAAAFBQUFDY2gAEAAAFYKzY2NjY2dnZ2dnZ2QEBAAAAAAQAb 0 255 BOgAAMAfNjY2wsLCwsLCwsLCwp/CwsLCwsI2NiQVNjQ2NjY2NjY2AAAAAQAbZxU2AAQ2NjY2Ngk2NjY2NIBYNgAQATY2NjY0/zY2NjYAAADeAzY2NjY2NjY2NjY2NskAAAABABtn6gABbEtLS0tpS0sBNr52dnZ2H0YUADY2NgAANjYkNjY0/382NjY2NjYVNjZPNjY2NjYkNjb//4AAdnZ2dnZ2dv8LAED/NjY2NjQ2AAABAAEAgAAAATY2ClA2NtDO0NDQ0NDQ0DPQ0OLQ0NAAAAD7EBQUNjYAAdDQkAAAFBQUFDY2gAEAAAFYKzY2NjY2dnZ2dnZ2QEBAAAAA 624 \232\000\000\192.666\194\194\194\194\194\194\194\194\194\194\159\194\194\194\194\194\19466\$\0216466666.6\000\000\000\001\000\027g\0216\000\00466666\00966664\128X6\000\016\00166664\2556666\000\000\000\222\0036666666666.6\201\000\000\000\001\000\027g\234\000\001lKKKKiKK\0016\190vvvv\031F\020\000666\000\00066\$664\255\127666666\02166O.6666\$66\255\255\128\000vvvvvvv\255\011\000\@\255666646\000\000\001\000\001\000\128\000\000\00166\010P66\208\206\208\208\208\208\208\208\208.\208\208\226\208\208\208\000\000\000\251\016\020\02066\000\001\208\208\144\000\000\020\020\020\02066\128\001\000\000\001X+66666vvvvvv\@\@\@\000\000
+BAABAgMEBAUGBwQICQoLBBINDg8QAAAAEwQUFRYXBBgZGhsEHB0eNjY2AAA2NjY2Njw2ATYYNkUAAAIQ//9/TExMTExMTExMTExMTExMTExMTExMTENMTBMTExNqEykTlhMTEyYLAAEUFAAABjY2NjYAAAE2NhwAAAABAAABBDb/fwAAAzY2NgX//wU2NgD7SDYkNjk5OTk5OTk5OTk5OTk5OTk5OTk5PTY0pDY2NjY2NiQAAAE2Nn82cXZ2dnZ2dnZ20Coq0DPQ0P/QM9DQ//9//9AAAAHSu9DRkNAABgAA/xQUAAAGfzYkNjY0Nks2AAQeVTb/AAABNn////8= 0 -1
+BAABAgMEBAUGBwQICQoLBBINDg8EAAAQAAQUFRYXBBgZGhsEHB0eNjY2AAA2NjY2Njw2ATYYNkUAAAIQ//9/TExMTExMTExMTExMTExMTExMTExMTENMTBMTExNqEykTlhMTEyYLAAEUFAAABjY2NjYAAAE2NhwAAAABAAABBDb/fwAAAzY2NgX//wU2NgD7SDYkNjk5OTk5OTk5OTk5OTk5OTk5OTk5PTY0pDY2NjY2NiQAAAE2Nn82cXZ2dnZ2dnZ20Coq0DPQ0P/QM9DQ//9//9AAAAHSu9DRkNAABgAA/xQUAAAGfzYkNjY0Nks2AAQeVTb/AAABNn////8= 0 -1
+AgIhIiMEJCUkAScBKAEpASoBKwEsAS0BLgExATgBOQE6IDsBASoBKwEsAS0BLgE3ATgBOQE6IDsBPAE9AT4BPw0BDgEPARABEQESARMBFAEBDgEPARABEQESARMBFCEhISEhISEhISEhISEhIX4hISEhISEhISEhARcFGAEZARoBGwEcAR0BASYBJwEoASkBKjwBPQE+AT8NAQ4BDwEQAREBEgETARQBFwUYARkBGgEbARwBHQEeAR8BIAEhASIBIwEkASUBJgEnASgBAAACQCsBLAEtAS4BJwEoAUgBKgErASwBLQEuATsBPAE9AT4BPwA= 0 242 AgIhIiMEJCUkAScBKAEpASoBKwEsAS0BLgExATgBOQE6IDsBASoBKwEsAS0BLgE3ATgBOQE6IDsBPAE9AT4BPw0BDgEPARABEQESARMBFAEBDgEPARABEQESARMBFCEhISEhISEhISEhISEhIX4hISEhISEhISEhARcFGAEZARoBGwEcAR0BASYBJwEoASkBKjwBPQE+AT8NAQ4BDwEQAREBEgETARQBFwUYARkBGgEbARwBHQEeAR8BIAEhASIBIwEkASUBJgEnASgBAAACQCsBLAEtAS4BJwEoAUgBKgErASwBLQEuATsBPAE9AT4BPwA= 607 \002!.#\004\$%\$\001'\001\(\001\)\001*\001+\001,\001-\001\.\0011\0018\0019\001:\032\;\001\001*.+.,.-.\..7.8.9.:.\;\001<\001=\001>\001?\013\001\014\001\015\001\016\001\017\001\018\001\019\001\020\001\001\014\001\015\001\016\001.\001\018\001\019\001\020!!!!!!!!!!!.!!!~!!!!!!!!!!\001\023\005\024\001\025\001\026\001\027\001\028\001\029\001\001&\001'.\(.\).*.\001=\001>\001?\013\001\014\001\015\001\016\001\017\001\018\001\019\001\020\001\023\005\024\001\025\001\026\001\027\001\028\001\029\001\030\001\031\001\032\001!\001\"\001#\001\$\001%\001&\001'\001\(\001\000\000.\@+.,.-.\..'.\(.H.*.+.,.-.\..\;.<.=.>.?
+wMAAAcDAwMDAQAA2NgAAGsAfNjY8NjYkFTY0NjYyNjY2NjYAEDY2S0tLS0sBFr4fRhQ2NjY2AAA2Nlg2djw2NjY2NgAAAQABNjY2PDY2JBU2BLM2ojY2iTY2Bf//BUU2OTY+NiU9PT0BNjY2AAAAAUYUwB82Nn7s7OzsEBQUDDY2NgAAATY2NjZYNjYyNk02NlEAEQEANjYABf//BUU2OTY2NiU9PT09NgAAAfI//3Y2AAABNjY0NgAAAYA2PRAA+/v7+/v7+/v///8= 16 -1
+AwAAJ8AAISEhISEhISEhISEhISEhfiEhISEhISEhISG7u5CjAA== 0 -1
+AhIAAlBINQAAATU1FTo/SEhIAwMDAwMFRTY5NgA2JT09PQEfNjY8NjYkFTY0NjYyNjY2NjYADDY2QksAAAEBFr4fRhQ2NjY2AAA2Nlg2djw2NjY2NgD//gABNjY2PDY2JBUAfg== 68 -1
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 0 -1
+AQA= 0 -1
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=6bdff2e237fd167fadb7393c1fb31e0981a0687d
commit 6bdff2e237fd167fadb7393c1fb31e0981a0687d
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Jun 21 13:35:37 2017 +0200
getaddrinfo: Avoid stack copy of IPv6 address
(cherry picked from commit 76b8266f990a2912f42d1b7050840e8c7f14f2c2)
diff --git a/ChangeLog b/ChangeLog
index 1a8f74a..16da468 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
2017-06-21 Florian Weimer <fweimer@redhat.com>
+ * sysdeps/posix/getaddrinfo.c (gaih_inet): Call __inet_pton_length
+ to parse addresses with IPv6 scope IDs.
+
+2017-06-21 Florian Weimer <fweimer@redhat.com>
+
Add the __inet_pton_length helper function.
* resolv/resolv-internal.h (__inet_pton_length): Declare.
* resolv/inet_pton (__inet_pton_length): Rename from __inet_pton.
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index e0c5393..611abc2 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -539,46 +539,11 @@ gaih_inet (const char *name, const struct gaih_service *service,
{
char *scope_delim = strchr (name, SCOPE_DELIMITER);
int e;
-
- {
- bool malloc_namebuf = false;
- char *namebuf = (char *) name;
-
- if (__glibc_unlikely (scope_delim != NULL))
- {
- if (malloc_name)
- *scope_delim = '\0';
- else
- {
- if (__libc_use_alloca (alloca_used
- + scope_delim - name + 1))
- {
- namebuf = alloca_account (scope_delim - name + 1,
- alloca_used);
- *((char *) __mempcpy (namebuf, name,
- scope_delim - name)) = '\0';
- }
- else
- {
- namebuf = strndup (name, scope_delim - name);
- if (namebuf == NULL)
- {
- assert (!malloc_name);
- return -EAI_MEMORY;
- }
- malloc_namebuf = true;
- }
- }
- }
-
- e = inet_pton (AF_INET6, namebuf, at->addr);
-
- if (malloc_namebuf)
- free (namebuf);
- else if (scope_delim != NULL && malloc_name)
- /* Undo what we did above. */
- *scope_delim = SCOPE_DELIMITER;
- }
+ if (scope_delim == NULL)
+ e = inet_pton (AF_INET6, name, at->addr);
+ else
+ e = __inet_pton_length (AF_INET6, name, scope_delim - name,
+ at->addr);
if (e > 0)
{
if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6)
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=0fdd895d7786babcae15ce923b3ae3eb54f6140e
commit 0fdd895d7786babcae15ce923b3ae3eb54f6140e
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Jun 21 13:09:08 2017 +0200
__inet_pton_length: Implement new internal helper function
(cherry picked from commit 60149b28590be28051f99d0a343d7fbe002f2a8c)
diff --git a/ChangeLog b/ChangeLog
index c4a8740..1a8f74a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,21 @@
+2017-06-21 Florian Weimer <fweimer@redhat.com>
+
+ Add the __inet_pton_length helper function.
+ * resolv/resolv-internal.h (__inet_pton_length): Declare.
+ * resolv/inet_pton (__inet_pton_length): Rename from __inet_pton.
+ Add length argument.
+ (__inet_pton): New function.
+ (inet_pton4): Add length argument.
+ (hex_digit_value): New function.
+ (inet_pton6): Add length argument. Call hex_digit_value. Use
+ memmove and memset to fill :: gap.
+ * resolv/Makefile (tests, tsts-static, tests-internal): Add
+ tst-inet_pton.
+ * resolv/tst-inet_pton.c: New file.
+ * support/Makefile (libsupport-routines): Add xmprotect.
+ * support/xunistd.h (xmprotect): Declare.
+ * support/xmprotect.c: New file.
+
2017-05-11 Florian Weimer <fweimer@redhat.com>
* resolv/inet_pton.c: Reformat in GNU style. Remove
diff --git a/resolv/Makefile b/resolv/Makefile
index 01086d5..d46cb30 100644
--- a/resolv/Makefile
+++ b/resolv/Makefile
@@ -43,6 +43,7 @@ routines += gai_sigqueue
tests += \
tst-bug18665 \
tst-bug18665-tcp \
+ tst-inet_pton \
tst-res_hconf_reorder \
tst-res_use_inet6 \
tst-resolv-basic \
diff --git a/resolv/Versions b/resolv/Versions
index e561bce..f528ed5 100644
--- a/resolv/Versions
+++ b/resolv/Versions
@@ -27,6 +27,7 @@ libc {
__h_errno; __resp;
__res_maybe_init; __res_iclose;
+ __inet_pton_length;
}
}
diff --git a/resolv/inet_pton.c b/resolv/inet_pton.c
index 68f0fa5..b95da47 100644
--- a/resolv/inet_pton.c
+++ b/resolv/inet_pton.c
@@ -1,3 +1,20 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
/*
* Copyright (c) 1996,1999 by Internet Software Consortium.
*
@@ -15,58 +32,53 @@
* SOFTWARE.
*/
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
-#include <string.h>
#include <errno.h>
+#include <netinet/in.h>
+#include <resolv/resolv-internal.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
-static int inet_pton4 (const char *src, unsigned char *dst);
-static int inet_pton6 (const char *src, unsigned char *dst);
+static int inet_pton4 (const char *src, const char *src_end, u_char *dst);
+static int inet_pton6 (const char *src, const char *src_end, u_char *dst);
-/* Convert from presentation format (which usually means ASCII printable)
- * to network format (which is usually some kind of binary format).
- *
- * return:
- * 1 if the address was valid for the specified address family
- * 0 if the address wasn't valid (`dst' is untouched in this case)
- * -1 if some other error occurred (`dst' is untouched in this case, too)
- * author:
- * Paul Vixie, 1996.
- */
int
-__inet_pton (int af, const char *src, void *dst)
+__inet_pton_length (int af, const char *src, size_t srclen, void *dst)
{
switch (af)
{
case AF_INET:
- return inet_pton4 (src, dst);
+ return inet_pton4 (src, src + srclen, dst);
case AF_INET6:
- return inet_pton6 (src, dst);
+ return inet_pton6 (src, src + srclen, dst);
default:
__set_errno (EAFNOSUPPORT);
return -1;
}
}
+libc_hidden_def (__inet_pton_length)
+
+/* Like __inet_pton_length, but use strlen (SRC) as the length of
+ SRC. */
+int
+__inet_pton (int af, const char *src, void *dst)
+{
+ return __inet_pton_length (af, src, strlen (src), dst);
+}
libc_hidden_def (__inet_pton)
weak_alias (__inet_pton, inet_pton)
libc_hidden_weak (inet_pton)
-/* Like inet_atonbut without all the hexadecimal, octal and shorthand.
- *
- * return:
- * 1 if `src' is a valid dotted quad, else 0.
- * notice:
- * does not touch `dst' unless it's returning 1.
- * author:
- * Paul Vixie, 1996.
- */
+/* Like inet_aton but without all the hexadecimal, octal and shorthand
+ (and trailing garbage is not ignored). Return 1 if SRC is a valid
+ dotted quad, else 0. This function does not touch DST unless it's
+ returning 1.
+ Author: Paul Vixie, 1996. */
static int
-inet_pton4 (const char *src, unsigned char *dst)
+inet_pton4 (const char *src, const char *end, unsigned char *dst)
{
int saw_digit, octets, ch;
unsigned char tmp[NS_INADDRSZ], *tp;
@@ -74,8 +86,9 @@ inet_pton4 (const char *src, unsigned char *dst)
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
- while ((ch = *src++) != '\0')
+ while (src < end)
{
+ ch = *src++;
if (ch >= '0' && ch <= '9')
{
unsigned int new = *tp * 10 + (ch - '0');
@@ -108,22 +121,27 @@ inet_pton4 (const char *src, unsigned char *dst)
return 1;
}
-/* Cconvert presentation level address to network order binary form.
- *
- * return:
- * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
- * notice:
- * (1) does not touch `dst' unless it's returning 1.
- * (2) :: in a full address is silently ignored.
- * credit:
- * inspired by Mark Andrews.
- * author:
- * Paul Vixie, 1996.
- */
+/* Return the value of CH as a hexademical digit, or -1 if it is a
+ different type of character. */
+static int
+hex_digit_value (char ch)
+{
+ if ('0' <= ch && ch <= '9')
+ return ch - '0';
+ if ('a' <= ch && ch <= 'f')
+ return ch - 'a' + 10;
+ if ('A' <= ch && ch <= 'F')
+ return ch - 'A' + 10;
+ return -1;
+}
+
+/* Convert presentation-level IPv6 address to network order binary
+ form. Return 1 if SRC is a valid [RFC1884 2.2] address, else 0.
+ This function does not touch DST unless it's returning 1.
+ Author: Paul Vixie, 1996. Inspired by Mark Andrews. */
static int
-inet_pton6 (const char *src, unsigned char *dst)
+inet_pton6 (const char *src, const char *src_endp, unsigned char *dst)
{
- static const char xdigits[] = "0123456789abcdef";
unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
const char *curtok;
int ch, saw_xdigit;
@@ -132,22 +150,28 @@ inet_pton6 (const char *src, unsigned char *dst)
tp = memset (tmp, '\0', NS_IN6ADDRSZ);
endp = tp + NS_IN6ADDRSZ;
colonp = NULL;
+
/* Leading :: requires some special handling. */
+ if (src == src_endp)
+ return 0;
if (*src == ':')
- if (*++src != ':')
- return 0;
+ {
+ ++src;
+ if (src == src_endp || *src != ':')
+ return 0;
+ }
+
curtok = src;
saw_xdigit = 0;
val = 0;
- while ((ch = tolower (*src++)) != '\0')
+ while (src < src_endp)
{
- const char *pch;
-
- pch = strchr (xdigits, ch);
- if (pch != NULL)
+ ch = *src++;
+ int digit = hex_digit_value (ch);
+ if (digit >= 0)
{
val <<= 4;
- val |= (pch - xdigits);
+ val |= digit;
if (val > 0xffff)
return 0;
saw_xdigit = 1;
@@ -163,10 +187,8 @@ inet_pton6 (const char *src, unsigned char *dst)
colonp = tp;
continue;
}
- else if (*src == '\0')
- {
- return 0;
- }
+ else if (src == src_endp)
+ return 0;
if (tp + NS_INT16SZ > endp)
return 0;
*tp++ = (unsigned char) (val >> 8) & 0xff;
@@ -175,8 +197,8 @@ inet_pton6 (const char *src, unsigned char *dst)
val = 0;
continue;
}
- if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
- inet_pton4 (curtok, tp) > 0)
+ if (ch == '.' && ((tp + NS_INADDRSZ) <= endp)
+ && inet_pton4 (curtok, src_endp, tp) > 0)
{
tp += NS_INADDRSZ;
saw_xdigit = 0;
@@ -193,20 +215,13 @@ inet_pton6 (const char *src, unsigned char *dst)
}
if (colonp != NULL)
{
- /*
- * Since some memmove's erroneously fail to handle
- * overlapping regions, we'll do the shift by hand.
- */
- const int n = tp - colonp;
- int i;
-
+ /* Replace :: with zeros. */
if (tp == endp)
- return 0;
- for (i = 1; i <= n; i++)
- {
- endp[- i] = colonp[n - i];
- colonp[n - i] = 0;
- }
+ /* :: would expand to a zero-width field. */
+ return 0;
+ size_t n = tp - colonp;
+ memmove (endp - n, colonp, n);
+ memset (colonp, 0, endp - n - colonp);
tp = endp;
}
if (tp != endp)
diff --git a/resolv/resolv-internal.h b/resolv/resolv-internal.h
index 76fbe2f..fde7f2e 100644
--- a/resolv/resolv-internal.h
+++ b/resolv/resolv-internal.h
@@ -50,4 +50,13 @@ enum
int __res_nopt (res_state, int n0, unsigned char *buf, int buflen,
int anslen) attribute_hidden;
+/* Convert from presentation format (which usually means ASCII
+ printable) to network format (which is usually some kind of binary
+ format). The input is in the range [SRC, SRC + SRCLEN). The
+ output is written to DST (which has to be 4 or 16 bytes long,
+ depending on AF). Return 0 for invalid input, 1 for success, -1
+ for an invalid address family. */
+int __inet_pton_length (int af, const char *src, size_t srclen, void *);
+libc_hidden_proto (__inet_pton_length)
+
#endif /* _RESOLV_INTERNAL_H */
diff --git a/resolv/tst-inet_pton.c b/resolv/tst-inet_pton.c
new file mode 100644
index 0000000..7fffb24
--- /dev/null
+++ b/resolv/tst-inet_pton.c
@@ -0,0 +1,549 @@
+/* Test inet_pton functions.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <arpa/inet.h>
+#include <resolv/resolv-internal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/xunistd.h>
+#include <sys/mman.h>
+#include <sys/param.h>
+#include <unistd.h>
+
+/* Memory region created by next_to_fault_allocate. */
+struct next_to_fault
+{
+ /* The user data. */
+ char *buffer;
+ size_t length;
+
+ /* The entire allocated region. */
+ void *region_start;
+ size_t region_size;
+};
+
+/* Allocate a buffer of SIZE bytes just before a page which is mapped
+ with PROT_NONE (so that overrunning the buffer will cause a
+ fault). */
+static struct next_to_fault
+next_to_fault_allocate (size_t size)
+{
+ long page_size = sysconf (_SC_PAGE_SIZE);
+ TEST_VERIFY_EXIT (page_size > 0);
+ struct next_to_fault result;
+ result.region_size = roundup (size, page_size) + page_size;
+ TEST_VERIFY_EXIT (size + page_size > size);
+ TEST_VERIFY_EXIT (result.region_size > size);
+ result.region_start
+ = xmmap (NULL, result.region_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1);
+ /* Unmap the page after the allocation. */
+ xmprotect (result.region_start + (result.region_size - page_size),
+ page_size, PROT_NONE);
+ /* Align the allocation within the region so that it ends just
+ before the PROT_NONE page. */
+ result.buffer = result.region_start + result.region_size - page_size - size;
+ result.length = size;
+ return result;
+}
+
+/* Deallocate the memory region allocated by
+ next_to_fault_allocate. */
+static void
+next_to_fault_free (struct next_to_fault *ntf)
+{
+ xmunmap (ntf->region_start, ntf->region_size);
+ *ntf = (struct next_to_fault) { NULL, };
+}
+
+struct test_case
+{
+ /* The input data. */
+ const char *input;
+
+ /* True if AF_INET parses successfully. */
+ bool ipv4_ok;
+
+ /* True if AF_INET6 parses successfully. */
+ bool ipv6_ok;
+
+ /* Expected result for AF_INET. */
+ unsigned char ipv4_expected[4];
+
+ /* Expected result for AF_INET6. */
+ unsigned char ipv6_expected[16];
+};
+
+static void
+check_result (const char *what, const struct test_case *t, int family,
+ void *result_buffer, int inet_ret)
+{
+ TEST_VERIFY_EXIT (inet_ret >= -1);
+ TEST_VERIFY_EXIT (inet_ret <= 1);
+
+ int ok;
+ const unsigned char *expected;
+ size_t result_size;
+ switch (family)
+ {
+ case AF_INET:
+ ok = t->ipv4_ok;
+ expected = t->ipv4_expected;
+ result_size = 4;
+ break;
+ case AF_INET6:
+ ok = t->ipv6_ok;
+ expected = t->ipv6_expected;
+ result_size = 16;
+ break;
+ default:
+ FAIL_EXIT1 ("invalid address family %d", family);
+ }
+
+ if (inet_ret != ok)
+ {
+ support_record_failure ();
+ printf ("error: %s return value mismatch for [[%s]], family %d\n"
+ " expected: %d\n"
+ " actual: %d\n",
+ what, t->input, family, ok, inet_ret);
+ return;
+ }
+ if (memcmp (result_buffer, expected, result_size) != 0)
+ {
+ support_record_failure ();
+ printf ("error: %s result mismatch for [[%s]], family %d\n",
+ what, t->input, family);
+ }
+}
+
+static void
+run_one_test (const struct test_case *t)
+{
+ size_t test_len = strlen (t->input);
+
+ struct next_to_fault ntf_out4 = next_to_fault_allocate (4);
+ struct next_to_fault ntf_out6 = next_to_fault_allocate (16);
+
+ /* inet_pton requires NUL termination. */
+ {
+ struct next_to_fault ntf_in = next_to_fault_allocate (test_len + 1);
+ memcpy (ntf_in.buffer, t->input, test_len + 1);
+ memset (ntf_out4.buffer, 0, 4);
+ check_result ("inet_pton", t, AF_INET, ntf_out4.buffer,
+ inet_pton (AF_INET, ntf_in.buffer, ntf_out4.buffer));
+ memset (ntf_out6.buffer, 0, 16);
+ check_result ("inet_pton", t, AF_INET6, ntf_out6.buffer,
+ inet_pton (AF_INET6, ntf_in.buffer, ntf_out6.buffer));
+ next_to_fault_free (&ntf_in);
+ }
+
+ /* __inet_pton_length does not require NUL termination. */
+ {
+ struct next_to_fault ntf_in = next_to_fault_allocate (test_len);
+ memcpy (ntf_in.buffer, t->input, test_len);
+ memset (ntf_out4.buffer, 0, 4);
+ check_result ("__inet_pton_length", t, AF_INET, ntf_out4.buffer,
+ __inet_pton_length (AF_INET, ntf_in.buffer, ntf_in.length,
+ ntf_out4.buffer));
+ memset (ntf_out6.buffer, 0, 16);
+ check_result ("__inet_pton_length", t, AF_INET6, ntf_out6.buffer,
+ __inet_pton_length (AF_INET6, ntf_in.buffer, ntf_in.length,
+ ntf_out6.buffer));
+ next_to_fault_free (&ntf_in);
+ }
+
+ next_to_fault_free (&ntf_out4);
+ next_to_fault_free (&ntf_out6);
+}
+
+/* The test cases were manually crafted and the set enhanced with
+ American Fuzzy Lop. */
+const struct test_case test_cases[] =
+ {
+ {.input = ".:", },
+ {.input = "0.0.0.0",
+ .ipv4_ok = true,
+ .ipv4_expected = {0, 0, 0, 0},
+ },
+ {.input = "0.:", },
+ {.input = "00", },
+ {.input = "0000000", },
+ {.input = "00000000000000000", },
+ {.input = "092.", },
+ {.input = "10.0.301.2", },
+ {.input = "127.0.0.1",
+ .ipv4_ok = true,
+ .ipv4_expected = {127, 0, 0, 1},
+ },
+ {.input = "19..", },
+ {.input = "192.0.2.-1", },
+ {.input = "192.0.2.01", },
+ {.input = "192.0.2.1.", },
+ {.input = "192.0.2.1192.", },
+ {.input = "192.0.2.192.\377..", },
+ {.input = "192.0.2.256", },
+ {.input = "192.0.2.27",
+ .ipv4_ok = true,
+ .ipv4_expected = {192, 0, 2, 27},
+ },
+ {.input = "192.0.201.", },
+ {.input = "192.0.261.", },
+ {.input = "192.0.2\256", },
+ {.input = "192.0.\262.", },
+ {.input = "192.062.", },
+ {.input = "192.092.\256", },
+ {.input = "192.0\2562.", },
+ {.input = "192.192.0.2661\031", },
+ {.input = "192.192.00n2.1.", },
+ {.input = "192.192.2.190.", },
+ {.input = "192.255.255.2555", },
+ {.input = "192.92.219\023.", },
+ {.input = "192.\260.2.", },
+ {.input = "1:1::1:1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x1, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x1
+ },
+ },
+ {.input = "2", },
+ {.input = "2.", },
+ {.input = "2001:db8:00001::f",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x1, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf
+ },
+ },
+ {.input = "2001:db8:10000::f", },
+ {.input = "2001:db8:1234:5678:abcd:ef01:2345:67",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x12, 0x34, 0x56, 0x78,
+ 0xab, 0xcd, 0xef, 0x1, 0x23, 0x45, 0x0, 0x67
+ },
+ },
+ {.input = "2001:db8:1234:5678:abcd:ef01:2345:6789:1", },
+ {.input = "2001:db8:1234:5678:abcd:ef01:2345::6789", },
+ {.input = "2001:db8::0",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0
+ },
+ },
+ {.input = "2001:db8::00",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0
+ },
+ },
+ {.input = "2001:db8::1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1
+ },
+ },
+ {.input = "2001:db8::10",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10
+ },
+ },
+ {.input = "2001:db8::19",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x19
+ },
+ },
+ {.input = "2001:db8::1::\012", },
+ {.input = "2001:db8::1::2\012", },
+ {.input = "2001:db8::2",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2
+ },
+ },
+ {.input = "2001:db8::3",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3
+ },
+ },
+ {.input = "2001:db8::4",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4
+ },
+ },
+ {.input = "2001:db8::5",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x5
+ },
+ },
+ {.input = "2001:db8::6",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x6
+ },
+ },
+ {.input = "2001:db8::7",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7
+ },
+ },
+ {.input = "2001:db8::8",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x8
+ },
+ },
+ {.input = "2001:db8::9",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x9
+ },
+ },
+ {.input = "2001:db8::A",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa
+ },
+ },
+ {.input = "2001:db8::B",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xb
+ },
+ },
+ {.input = "2001:db8::C",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc
+ },
+ },
+ {.input = "2001:db8::D",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xd
+ },
+ },
+ {.input = "2001:db8::E",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xe
+ },
+ },
+ {.input = "2001:db8::F",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf
+ },
+ },
+ {.input = "2001:db8::a",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa
+ },
+ },
+ {.input = "2001:db8::b",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xb
+ },
+ },
+ {.input = "2001:db8::c",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc
+ },
+ },
+ {.input = "2001:db8::d",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xd
+ },
+ },
+ {.input = "2001:db8::e",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xe
+ },
+ },
+ {.input = "2001:db8::f",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf
+ },
+ },
+ {.input = "2001:db8::ff",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x20, 0x1, 0xd, 0xb8, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xff
+ },
+ },
+ {.input = "2001:db8::ffff:2\012", },
+ {.input = "22", },
+ {.input = "2222@", },
+ {.input = "255.255.255.255",
+ .ipv4_ok = true,
+ .ipv4_expected = {255, 255, 255, 255},
+ },
+ {.input = "255.255.255.255\001", },
+ {.input = "255.255.255.25555", },
+ {.input = "2:", },
+ {.input = "2:a:8:EEEE::EEEE:F:EEE8:EEEE\034*:", },
+ {.input = "2:ff:1:1:7:ff:1:1:7.", },
+ {.input = "2f:0000000000000000000000000000000000000000000000000000000000"
+ "0000000000000000000000000000000000000000000000000000000000000000000000"
+ "0G01",
+ },
+ {.input = "429495", },
+ {.input = "5::5::", },
+ {.input = "6.6.", },
+ {.input = "992.", },
+ {.input = "::",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0
+ },
+ },
+ {.input = "::00001",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1
+ },
+ },
+ {.input = "::1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1
+ },
+ },
+ {.input = "::10000", },
+ {.input = "::1:1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x1
+ },
+ },
+ {.input = "::ff:1:1:7.0.0.1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xff,
+ 0x0, 0x1, 0x0, 0x1, 0x7, 0x0, 0x0, 0x1
+ },
+ },
+ {.input = "::ff:1:1:7:ff:1:1:7.", },
+ {.input = "::ff:1:1:7ff:1:8:7.0.0.1", },
+ {.input = "::ff:1:1:7ff:1:8f:1:1:71", },
+ {.input = "::ffff:02fff:127.0.S1", },
+ {.input = "::ffff:127.0.0.1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xff, 0xff, 0x7f, 0x0, 0x0, 0x1
+ },
+ },
+ {.input = "::ffff:1:7.0.0.1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0xff, 0xff, 0x0, 0x1, 0x7, 0x0, 0x0, 0x1
+ },
+ },
+ {.input = ":\272", },
+ {.input = "A:f:ff:1:1:D:ff:1:1::7.", },
+ {.input = "AAAAA.", },
+ {.input = "D:::", },
+ {.input = "DF8F", },
+ {.input = "F::",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0xf, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0
+ },
+ },
+ {.input = "F:A:8:EEEE:8:EEEE\034*:", },
+ {.input = "F:a:8:EEEE:8:EEEE\034*:", },
+ {.input = "F:ff:100:7ff:1:8:7.0.10.1",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0x0, 0xf, 0x0, 0xff, 0x1, 0x0, 0x7, 0xff,
+ 0x0, 0x1, 0x0, 0x8, 0x7, 0x0, 0xa, 0x1
+ },
+ },
+ {.input = "d92.", },
+ {.input = "ff:00000000000000000000000000000000000000000000000000000000000"
+ "00000000000000000000000000000000000000000000000000000000000000000001",
+ },
+ {.input = "fff2:2::ff2:2:f7",
+ .ipv6_ok = true,
+ .ipv6_expected = {
+ 0xff, 0xf2, 0x0, 0x2, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0xf, 0xf2, 0x0, 0x2, 0x0, 0xf7
+ },
+ },
+ {.input = "ffff:ff:ff:fff:ff:ff:ff:", },
+ {.input = "\272:", },
+ {NULL}
+ };
+
+static int
+do_test (void)
+{
+ for (size_t i = 0; test_cases[i].input != NULL; ++i)
+ run_one_test (test_cases + i);
+ return 0;
+}
+
+#include <support/test-driver.c>
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=eda5f13d712ae2631165698c017d03d739222f33
commit eda5f13d712ae2631165698c017d03d739222f33
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu May 11 14:48:51 2017 +0200
inet_pton: Reformat in GNU style
Generated machine code is identical on x86-64.
(cherry picked from commit d53b8652880ba42913f66e7eee0567ce4cfe7791)
diff --git a/ChangeLog b/ChangeLog
index 0ab7c49..c4a8740 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-05-11 Florian Weimer <fweimer@redhat.com>
+
+ * resolv/inet_pton.c: Reformat in GNU style. Remove
+ internal_function on static functions.
+
2017-06-03 Florian Weimer <fweimer@redhat.com>
* sysdeps/posix/getaddrinfo.c (gaih_inet): Call __strdup instead
diff --git a/resolv/inet_pton.c b/resolv/inet_pton.c
index c0a7d54..68f0fa5 100644
--- a/resolv/inet_pton.c
+++ b/resolv/inet_pton.c
@@ -25,188 +25,192 @@
#include <string.h>
#include <errno.h>
-/*
- * WARNING: Don't even consider trying to compile this on a system where
- * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
- */
-
-static int inet_pton4 (const char *src, u_char *dst) internal_function;
-static int inet_pton6 (const char *src, u_char *dst) internal_function;
+static int inet_pton4 (const char *src, unsigned char *dst);
+static int inet_pton6 (const char *src, unsigned char *dst);
-/* int
- * inet_pton(af, src, dst)
- * convert from presentation format (which usually means ASCII printable)
- * to network format (which is usually some kind of binary format).
+/* Convert from presentation format (which usually means ASCII printable)
+ * to network format (which is usually some kind of binary format).
+ *
* return:
- * 1 if the address was valid for the specified address family
- * 0 if the address wasn't valid (`dst' is untouched in this case)
- * -1 if some other error occurred (`dst' is untouched in this case, too)
+ * 1 if the address was valid for the specified address family
+ * 0 if the address wasn't valid (`dst' is untouched in this case)
+ * -1 if some other error occurred (`dst' is untouched in this case, too)
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
int
__inet_pton (int af, const char *src, void *dst)
{
- switch (af) {
- case AF_INET:
- return (inet_pton4(src, dst));
- case AF_INET6:
- return (inet_pton6(src, dst));
- default:
- __set_errno (EAFNOSUPPORT);
- return (-1);
- }
- /* NOTREACHED */
+ switch (af)
+ {
+ case AF_INET:
+ return inet_pton4 (src, dst);
+ case AF_INET6:
+ return inet_pton6 (src, dst);
+ default:
+ __set_errno (EAFNOSUPPORT);
+ return -1;
+ }
}
libc_hidden_def (__inet_pton)
weak_alias (__inet_pton, inet_pton)
libc_hidden_weak (inet_pton)
-/* int
- * inet_pton4(src, dst)
- * like inet_aton() but without all the hexadecimal, octal (with the
- * exception of 0) and shorthand.
+/* Like inet_atonbut without all the hexadecimal, octal and shorthand.
+ *
* return:
- * 1 if `src' is a valid dotted quad, else 0.
+ * 1 if `src' is a valid dotted quad, else 0.
* notice:
- * does not touch `dst' unless it's returning 1.
+ * does not touch `dst' unless it's returning 1.
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
static int
-internal_function
-inet_pton4 (const char *src, u_char *dst)
+inet_pton4 (const char *src, unsigned char *dst)
{
- int saw_digit, octets, ch;
- u_char tmp[NS_INADDRSZ], *tp;
-
- saw_digit = 0;
- octets = 0;
- *(tp = tmp) = 0;
- while ((ch = *src++) != '\0') {
+ int saw_digit, octets, ch;
+ unsigned char tmp[NS_INADDRSZ], *tp;
- if (ch >= '0' && ch <= '9') {
- u_int new = *tp * 10 + (ch - '0');
+ saw_digit = 0;
+ octets = 0;
+ *(tp = tmp) = 0;
+ while ((ch = *src++) != '\0')
+ {
+ if (ch >= '0' && ch <= '9')
+ {
+ unsigned int new = *tp * 10 + (ch - '0');
- if (saw_digit && *tp == 0)
- return (0);
- if (new > 255)
- return (0);
- *tp = new;
- if (! saw_digit) {
- if (++octets > 4)
- return (0);
- saw_digit = 1;
- }
- } else if (ch == '.' && saw_digit) {
- if (octets == 4)
- return (0);
- *++tp = 0;
- saw_digit = 0;
- } else
- return (0);
- }
- if (octets < 4)
- return (0);
- memcpy(dst, tmp, NS_INADDRSZ);
- return (1);
+ if (saw_digit && *tp == 0)
+ return 0;
+ if (new > 255)
+ return 0;
+ *tp = new;
+ if (! saw_digit)
+ {
+ if (++octets > 4)
+ return 0;
+ saw_digit = 1;
+ }
+ }
+ else if (ch == '.' && saw_digit)
+ {
+ if (octets == 4)
+ return 0;
+ *++tp = 0;
+ saw_digit = 0;
+ }
+ else
+ return 0;
+ }
+ if (octets < 4)
+ return 0;
+ memcpy (dst, tmp, NS_INADDRSZ);
+ return 1;
}
-/* int
- * inet_pton6(src, dst)
- * convert presentation level address to network order binary form.
+/* Cconvert presentation level address to network order binary form.
+ *
* return:
- * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
+ * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
* notice:
- * (1) does not touch `dst' unless it's returning 1.
- * (2) :: in a full address is silently ignored.
+ * (1) does not touch `dst' unless it's returning 1.
+ * (2) :: in a full address is silently ignored.
* credit:
- * inspired by Mark Andrews.
+ * inspired by Mark Andrews.
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
static int
-internal_function
-inet_pton6 (const char *src, u_char *dst)
+inet_pton6 (const char *src, unsigned char *dst)
{
- static const char xdigits[] = "0123456789abcdef";
- u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
- const char *curtok;
- int ch, saw_xdigit;
- u_int val;
+ static const char xdigits[] = "0123456789abcdef";
+ unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
+ const char *curtok;
+ int ch, saw_xdigit;
+ unsigned int val;
- tp = memset(tmp, '\0', NS_IN6ADDRSZ);
- endp = tp + NS_IN6ADDRSZ;
- colonp = NULL;
- /* Leading :: requires some special handling. */
- if (*src == ':')
- if (*++src != ':')
- return (0);
- curtok = src;
- saw_xdigit = 0;
- val = 0;
- while ((ch = tolower (*src++)) != '\0') {
- const char *pch;
+ tp = memset (tmp, '\0', NS_IN6ADDRSZ);
+ endp = tp + NS_IN6ADDRSZ;
+ colonp = NULL;
+ /* Leading :: requires some special handling. */
+ if (*src == ':')
+ if (*++src != ':')
+ return 0;
+ curtok = src;
+ saw_xdigit = 0;
+ val = 0;
+ while ((ch = tolower (*src++)) != '\0')
+ {
+ const char *pch;
- pch = strchr(xdigits, ch);
- if (pch != NULL) {
- val <<= 4;
- val |= (pch - xdigits);
- if (val > 0xffff)
- return (0);
- saw_xdigit = 1;
- continue;
- }
- if (ch == ':') {
- curtok = src;
- if (!saw_xdigit) {
- if (colonp)
- return (0);
- colonp = tp;
- continue;
- } else if (*src == '\0') {
- return (0);
- }
- if (tp + NS_INT16SZ > endp)
- return (0);
- *tp++ = (u_char) (val >> 8) & 0xff;
- *tp++ = (u_char) val & 0xff;
- saw_xdigit = 0;
- val = 0;
- continue;
- }
- if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
- inet_pton4(curtok, tp) > 0) {
- tp += NS_INADDRSZ;
- saw_xdigit = 0;
- break; /* '\0' was seen by inet_pton4(). */
- }
- return (0);
+ pch = strchr (xdigits, ch);
+ if (pch != NULL)
+ {
+ val <<= 4;
+ val |= (pch - xdigits);
+ if (val > 0xffff)
+ return 0;
+ saw_xdigit = 1;
+ continue;
+ }
+ if (ch == ':')
+ {
+ curtok = src;
+ if (!saw_xdigit)
+ {
+ if (colonp)
+ return 0;
+ colonp = tp;
+ continue;
+ }
+ else if (*src == '\0')
+ {
+ return 0;
+ }
+ if (tp + NS_INT16SZ > endp)
+ return 0;
+ *tp++ = (unsigned char) (val >> 8) & 0xff;
+ *tp++ = (unsigned char) val & 0xff;
+ saw_xdigit = 0;
+ val = 0;
+ continue;
}
- if (saw_xdigit) {
- if (tp + NS_INT16SZ > endp)
- return (0);
- *tp++ = (u_char) (val >> 8) & 0xff;
- *tp++ = (u_char) val & 0xff;
+ if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
+ inet_pton4 (curtok, tp) > 0)
+ {
+ tp += NS_INADDRSZ;
+ saw_xdigit = 0;
+ break; /* '\0' was seen by inet_pton4. */
}
- if (colonp != NULL) {
- /*
- * Since some memmove()'s erroneously fail to handle
- * overlapping regions, we'll do the shift by hand.
- */
- const int n = tp - colonp;
- int i;
+ return 0;
+ }
+ if (saw_xdigit)
+ {
+ if (tp + NS_INT16SZ > endp)
+ return 0;
+ *tp++ = (unsigned char) (val >> 8) & 0xff;
+ *tp++ = (unsigned char) val & 0xff;
+ }
+ if (colonp != NULL)
+ {
+ /*
+ * Since some memmove's erroneously fail to handle
+ * overlapping regions, we'll do the shift by hand.
+ */
+ const int n = tp - colonp;
+ int i;
- if (tp == endp)
- return (0);
- for (i = 1; i <= n; i++) {
- endp[- i] = colonp[n - i];
- colonp[n - i] = 0;
- }
- tp = endp;
+ if (tp == endp)
+ return 0;
+ for (i = 1; i <= n; i++)
+ {
+ endp[- i] = colonp[n - i];
+ colonp[n - i] = 0;
}
- if (tp != endp)
- return (0);
- memcpy(dst, tmp, NS_IN6ADDRSZ);
- return (1);
+ tp = endp;
+ }
+ if (tp != endp)
+ return 0;
+ memcpy (dst, tmp, NS_IN6ADDRSZ);
+ return 1;
}
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=b091ef7e2f6288a001423a5d037b34663996ffb5
commit b091ef7e2f6288a001423a5d037b34663996ffb5
Author: Florian Weimer <fweimer@redhat.com>
Date: Sat Jun 3 08:37:13 2017 +0200
getaddrinfo: Eliminate another strdup call
(cherry picked from commit 363911ce1313a246b7d33f0983a09e7ab2525b3a)
diff --git a/ChangeLog b/ChangeLog
index 2753fdd..0ab7c49 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-03 Florian Weimer <fweimer@redhat.com>
+
+ * sysdeps/posix/getaddrinfo.c (gaih_inet): Call __strdup instead
+ of strdup.
+
2017-06-02 Florian Weimer <fweimer@redhat.com>
* sysdeps/posix/getaddrinfo.c (gethosts): Eliminate another
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 37e84c1..e0c5393 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -732,7 +732,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
(*pat)->name = NULL;
else if (canonbuf == NULL)
{
- canonbuf = strdup (air->canon);
+ canonbuf = __strdup (air->canon);
if (canonbuf == NULL)
{
result = -EAI_MEMORY;
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=8fbf5688edbaead49130b0d2f887335475a298e7
commit 8fbf5688edbaead49130b0d2f887335475a298e7
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Jun 2 16:35:13 2017 +0200
getaddrinfo: Fix localplt failure involving strdup
(cherry picked from commit 6257fcfd58479f6b7ae0fdde045b9ff144d543da)
diff --git a/ChangeLog b/ChangeLog
index 6d44c42..2753fdd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
2017-06-02 Florian Weimer <fweimer@redhat.com>
+ * sysdeps/posix/getaddrinfo.c (gethosts): Eliminate another
+ strdupa.
+ (getcanonname): Use __strdup instead of strdup.
+
+2017-06-02 Florian Weimer <fweimer@redhat.com>
+
* sysdeps/posix/getaddrinfo.c (getcanonname): New function.
(gaih_inet): Remove malloc_canonbuf variable. Call getcanonname.
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 4ca1641..37e84c1 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -286,9 +286,16 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
} \
*pat = addrmem; \
\
- if (localcanon != NULL && canon == NULL) \
- canon = strdupa (localcanon); \
- \
+ if (localcanon != NULL && canon == NULL) \
+ { \
+ canonbuf = __strdup (localcanon); \
+ if (canonbuf == NULL) \
+ { \
+ result = -EAI_SYSTEM; \
+ goto free_and_return; \
+ } \
+ canon = canonbuf; \
+ } \
if (_family == AF_INET6 && *pat != NULL) \
got_ipv6 = true; \
} \
@@ -330,7 +337,7 @@ getcanonname (service_user *nip, struct gaih_addrtuple *at, const char *name)
string. */
s = (char *) name;
}
- return strdup (name);
+ return __strdup (name);
}
static int
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=1f60575f88769d09c478caa2968b751bca6a90e3
commit 1f60575f88769d09c478caa2968b751bca6a90e3
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Jun 2 14:54:56 2017 +0200
getaddrinfo: Always allocate canonical name on the heap
A further simplification could eliminate the canon variable in
gaih_inet and replace it with canonbuf. However, canonbuf is
used as a flag in the nscd code, which makes this somewhat
non-straightforward.
(cherry picked from commit 673cb072a4710bd4bf6029a062d2867cca929c43)
diff --git a/ChangeLog b/ChangeLog
index 82dc47c..6d44c42 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-02 Florian Weimer <fweimer@redhat.com>
+
+ * sysdeps/posix/getaddrinfo.c (getcanonname): New function.
+ (gaih_inet): Remove malloc_canonbuf variable. Call getcanonname.
+
2017-05-11 Florian Weimer <fweimer@redhat.com>
* sysdeps/posix/getaddrinfo.c (gethosts): Remove malloc_addrmem.
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index f6a3f4f..4ca1641 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -308,6 +308,30 @@ typedef enum nss_status (*nss_getcanonname_r)
int *errnop, int *h_errnop);
extern service_user *__nss_hosts_database attribute_hidden;
+/* This function is called if a canonical name is requested, but if
+ the service function did not provide it. It tries to obtain the
+ name using getcanonname_r from the same service NIP. If the name
+ cannot be canonicalized, return a copy of NAME. Return NULL on
+ memory allocation failure. The returned string is allocated on the
+ heap; the caller has to free it. */
+static char *
+getcanonname (service_user *nip, struct gaih_addrtuple *at, const char *name)
+{
+ nss_getcanonname_r cfct = __nss_lookup_function (nip, "getcanonname_r");
+ char *s = (char *) name;
+ if (cfct != NULL)
+ {
+ char buf[256];
+ int herrno;
+ int rc;
+ if (DL_CALL_FCT (cfct, (at->name ?: name, buf, sizeof (buf),
+ &s, &rc, &herrno)) != NSS_STATUS_SUCCESS)
+ /* If the canonical name cannot be determined, use the passed
+ string. */
+ s = (char *) name;
+ }
+ return strdup (name);
+}
static int
gaih_inet (const char *name, const struct gaih_service *service,
@@ -443,7 +467,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
bool malloc_name = false;
struct gaih_addrtuple *addrmem = NULL;
- bool malloc_canonbuf = false;
char *canonbuf = NULL;
int result = 0;
@@ -702,22 +725,13 @@ gaih_inet (const char *name, const struct gaih_service *service,
(*pat)->name = NULL;
else if (canonbuf == NULL)
{
- size_t canonlen = strlen (air->canon) + 1;
- if ((req->ai_flags & AI_CANONIDN) != 0
- && __libc_use_alloca (alloca_used + canonlen))
- canonbuf = alloca_account (canonlen, alloca_used);
- else
+ canonbuf = strdup (air->canon);
+ if (canonbuf == NULL)
{
- canonbuf = malloc (canonlen);
- if (canonbuf == NULL)
- {
- result = -EAI_MEMORY;
- goto free_and_return;
- }
- malloc_canonbuf = true;
+ result = -EAI_MEMORY;
+ goto free_and_return;
}
- canon = (*pat)->name = memcpy (canonbuf, air->canon,
- canonlen);
+ canon = (*pat)->name = canonbuf;
}
if (air->family[i] == AF_INET
@@ -924,55 +938,16 @@ gaih_inet (const char *name, const struct gaih_service *service,
if ((req->ai_flags & AI_CANONNAME) != 0
&& canon == NULL)
{
- /* If we need the canonical name, get it
- from the same service as the result. */
- nss_getcanonname_r cfct;
- int herrno;
-
- cfct = __nss_lookup_function (nip,
- "getcanonname_r");
- if (cfct != NULL)
+ canonbuf = getcanonname (nip, at, name);
+ if (canonbuf == NULL)
{
- const size_t max_fqdn_len = 256;
- if ((req->ai_flags & AI_CANONIDN) != 0
- && __libc_use_alloca (alloca_used
- + max_fqdn_len))
- canonbuf = alloca_account (max_fqdn_len,
- alloca_used);
- else
- {
- canonbuf = malloc (max_fqdn_len);
- if (canonbuf == NULL)
- {
- _res.options
- |= old_res_options
- & DEPRECATED_RES_USE_INET6;
- result = -EAI_MEMORY;
- goto free_and_return;
- }
- malloc_canonbuf = true;
- }
- char *s;
-
- if (DL_CALL_FCT (cfct, (at->name ?: name,
- canonbuf,
- max_fqdn_len,
- &s, &rc, &herrno))
- == NSS_STATUS_SUCCESS)
- canon = s;
- else
- {
- /* If the canonical name cannot be
- determined, use the passed in
- string. */
- if (malloc_canonbuf)
- {
- free (canonbuf);
- malloc_canonbuf = false;
- }
- canon = name;
- }
+ _res.options
+ |= old_res_options
+ & DEPRECATED_RES_USE_INET6;
+ result = -EAI_MEMORY;
+ goto free_and_return;
}
+ canon = canonbuf;
}
status = NSS_STATUS_SUCCESS;
}
@@ -1118,9 +1093,10 @@ gaih_inet (const char *name, const struct gaih_service *service,
#ifdef HAVE_LIBIDN
make_copy:
#endif
- if (malloc_canonbuf)
- /* We already allocated the string using malloc. */
- malloc_canonbuf = false;
+ if (canonbuf != NULL)
+ /* We already allocated the string using malloc, but
+ the buffer is now owned by canon. */
+ canonbuf = NULL;
else
{
canon = strdup (canon);
@@ -1215,8 +1191,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (malloc_name)
free ((char *) name);
free (addrmem);
- if (malloc_canonbuf)
- free (canonbuf);
+ free (canonbuf);
return result;
}
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=8a4bf46fe7256b2713e568589b89c2275975586c
commit 8a4bf46fe7256b2713e568589b89c2275975586c
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu May 11 10:01:49 2017 +0200
getaddrinfo: Unconditionally use malloc for address list
getaddrinfo has to call malloc eventually anyway, so the complexity
of avoiding malloc calls is not worth potential savings.
(cherry picked from commit 46ce8881ade788db56079622f47f648d4aaa003b)
diff --git a/ChangeLog b/ChangeLog
index a8408db..82dc47c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-05-11 Florian Weimer <fweimer@redhat.com>
+
+ * sysdeps/posix/getaddrinfo.c (gethosts): Remove malloc_addrmem.
+ (gaih_inet): Likewise.
+
2017-08-23 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/fpu/libm-test-ulps: Regenerated.
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 43eb313..f6a3f4f 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -278,9 +278,6 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
} \
else if (h != NULL) \
{ \
- /* Make sure that addrmem can be freed. */ \
- if (!malloc_addrmem) \
- addrmem = NULL; \
if (!convert_hostent_to_gaih_addrtuple (req, _family,h, &addrmem)) \
{ \
_res.options |= old_res_options & DEPRECATED_RES_USE_INET6; \
@@ -288,8 +285,6 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
goto free_and_return; \
} \
*pat = addrmem; \
- /* The conversion uses malloc unconditionally. */ \
- malloc_addrmem = true; \
\
if (localcanon != NULL && canon == NULL) \
canon = strdupa (localcanon); \
@@ -447,7 +442,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
bool malloc_name = false;
- bool malloc_addrmem = false;
struct gaih_addrtuple *addrmem = NULL;
bool malloc_canonbuf = false;
char *canonbuf = NULL;
@@ -633,8 +627,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
goto free_and_return;
}
*pat = addrmem;
- /* The conversion uses malloc unconditionally. */
- malloc_addrmem = true;
}
}
else
@@ -675,21 +667,11 @@ gaih_inet (const char *name, const struct gaih_service *service,
bool added_canon = (req->ai_flags & AI_CANONNAME) == 0;
char *addrs = air->addrs;
- if (__libc_use_alloca (alloca_used
- + air->naddrs * sizeof (struct gaih_addrtuple)))
- addrmem = alloca_account (air->naddrs
- * sizeof (struct gaih_addrtuple),
- alloca_used);
- else
+ addrmem = calloc (air->naddrs, sizeof (*addrmem));
+ if (addrmem == NULL)
{
- addrmem = malloc (air->naddrs
- * sizeof (struct gaih_addrtuple));
- if (addrmem == NULL)
- {
- result = -EAI_MEMORY;
- goto free_and_return;
- }
- malloc_addrmem = true;
+ result = -EAI_MEMORY;
+ goto free_and_return;
}
struct gaih_addrtuple *addrfree = addrmem;
@@ -1232,8 +1214,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
free_and_return:
if (malloc_name)
free ((char *) name);
- if (malloc_addrmem)
- free (addrmem);
+ free (addrmem);
if (malloc_canonbuf)
free (canonbuf);
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 253 +++++++++++++
NEWS | 5 +
include/alloc_buffer.h | 367 +++++++++++++++++++
include/libc-pointer-arith.h | 1 +
malloc/Makefile | 30 ++-
malloc/Versions | 14 +
malloc/alloc_buffer_alloc_array.c | 47 +++
malloc/alloc_buffer_allocate.c | 36 ++
malloc/alloc_buffer_copy_bytes.c | 34 ++
malloc/alloc_buffer_copy_string.c | 30 ++
malloc/alloc_buffer_create_failure.c | 31 ++
malloc/dynarray-skeleton.c | 521 ++++++++++++++++++++++++++
malloc/dynarray.h | 176 +++++++++
malloc/dynarray_at_failure.c | 31 ++
malloc/dynarray_emplace_enlarge.c | 73 ++++
malloc/dynarray_finalize.c | 62 ++++
malloc/dynarray_resize.c | 64 ++++
malloc/dynarray_resize_clear.c | 35 ++
malloc/malloc-internal.h | 19 +
malloc/tst-alloc_buffer.c | 665 ++++++++++++++++++++++++++++++++++
malloc/tst-dynarray-at-fail.c | 125 +++++++
malloc/tst-dynarray-fail.c | 418 +++++++++++++++++++++
malloc/tst-dynarray-shared.h | 80 ++++
malloc/tst-dynarray.c | 574 +++++++++++++++++++++++++++++
nss/Makefile | 9 +
nss/nss_files/files-hosts.c | 400 +++++++++++----------
nss/tst-nss-files-hosts-erange.c | 109 ++++++
nss/tst-nss-files-hosts-multi.c | 331 +++++++++++++++++
resolv/Makefile | 8 +
resolv/Versions | 1 +
resolv/inet_pton.c | 361 ++++++++++---------
resolv/ns_name.c | 2 +-
resolv/resolv-internal.h | 9 +
resolv/tst-inet_pton.c | 549 ++++++++++++++++++++++++++++
resolv/tst-ns_name.c | 438 ++++++++++++++++++++++
resolv/tst-ns_name.data | 548 ++++++++++++++++++++++++++++
resolv/tst-ns_name_compress.c | 75 ++++
resolv/tst-resolv-basic.c | 240 +++++++++++--
sysdeps/posix/getaddrinfo.c | 327 +++++++----------
39 files changed, 6509 insertions(+), 589 deletions(-)
create mode 100644 include/alloc_buffer.h
create mode 100644 include/libc-pointer-arith.h
create mode 100644 malloc/alloc_buffer_alloc_array.c
create mode 100644 malloc/alloc_buffer_allocate.c
create mode 100644 malloc/alloc_buffer_copy_bytes.c
create mode 100644 malloc/alloc_buffer_copy_string.c
create mode 100644 malloc/alloc_buffer_create_failure.c
create mode 100644 malloc/dynarray-skeleton.c
create mode 100644 malloc/dynarray.h
create mode 100644 malloc/dynarray_at_failure.c
create mode 100644 malloc/dynarray_emplace_enlarge.c
create mode 100644 malloc/dynarray_finalize.c
create mode 100644 malloc/dynarray_resize.c
create mode 100644 malloc/dynarray_resize_clear.c
create mode 100644 malloc/tst-alloc_buffer.c
create mode 100644 malloc/tst-dynarray-at-fail.c
create mode 100644 malloc/tst-dynarray-fail.c
create mode 100644 malloc/tst-dynarray-shared.h
create mode 100644 malloc/tst-dynarray.c
create mode 100644 nss/tst-nss-files-hosts-erange.c
create mode 100644 nss/tst-nss-files-hosts-multi.c
create mode 100644 resolv/tst-inet_pton.c
create mode 100644 resolv/tst-ns_name.c
create mode 100644 resolv/tst-ns_name.data
create mode 100644 resolv/tst-ns_name_compress.c
hooks/post-receive
--
GNU C Library master sources