This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
[PATCH 2/5] nptl: Convert tst-cond11.c to use libsupport
* support/timespec.h: New file. Provide timespec helper functions
along with macros in the style of those in check.h.
* support/timespec.c: New file. Implement check functions declared
in support/timespec.h.
* support/timespec-add.c: New file from gnulib containing
timespec_add implementation that handles overflow.
* support/timespec-sub.c: New file from gnulib containing
timespec_sub implementation that handles overflow.
* support/README: Mention timespec.h.
* nptl/tst-cond11.c: Use libsupport.
---
ChangeLog | 18 ++++-
nptl/tst-cond11.c | 169 ++++++++----------------------------------
support/Makefile | 3 +-
support/README | 5 +-
support/timespec-add.c | 71 ++++++++++++++++++-
support/timespec-sub.c | 71 ++++++++++++++++++-
support/timespec.c | 58 ++++++++++++++-
support/timespec.h | 79 ++++++++++++++++++++-
8 files changed, 341 insertions(+), 133 deletions(-)
create mode 100644 support/timespec-add.c
create mode 100644 support/timespec-sub.c
create mode 100644 support/timespec.c
create mode 100644 support/timespec.h
diff --git a/ChangeLog b/ChangeLog
index 6008265..cd0ef83 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,23 @@
2019-05-02 Mike Crowe <mac@mcrowe.com>
+ * support/timespec.h: New file. Provide timespec helper functions
+ along with macros in the style of those in check.h.
+
+ * support/timespec.c: New file. Implement check functions declared
+ in support/timespec.h.
+
+ * support/timespec-add.c: New file from gnulib containing
+ timespec_add implementation that handles overflow.
+
+ * support/timespec-sub.c: New file from gnulib containing
+ timespec_sub implementation that handles overflow.
+
+ * support/README: Mention timespec.h.
+
+ * nptl/tst-cond11.c: Use libsupport.
+
+2019-05-02 Mike Crowe <mac@mcrowe.com>
+
* support/xclock_gettime.c (xclock_gettime): New file. Provide
clock_gettime wrapper for use in tests that fails the test rather
than returning failure.
diff --git a/nptl/tst-cond11.c b/nptl/tst-cond11.c
index 97a8bd0..3bc4ff4 100644
--- a/nptl/tst-cond11.c
+++ b/nptl/tst-cond11.c
@@ -21,6 +21,10 @@
#include <stdio.h>
#include <time.h>
#include <unistd.h>
+#include <support/check.h>
+#include <support/timespec.h>
+#include <support/xthread.h>
+#include <support/xtime.h>
#if defined _POSIX_CLOCK_SELECTION && _POSIX_CLOCK_SELECTION >= 0
@@ -34,132 +38,36 @@ run_test (clockid_t cl)
printf ("clock = %d\n", (int) cl);
- if (pthread_condattr_init (&condattr) != 0)
- {
- puts ("condattr_init failed");
- return 1;
- }
-
- if (pthread_condattr_setclock (&condattr, cl) != 0)
- {
- puts ("condattr_setclock failed");
- return 1;
- }
+ TEST_COMPARE (pthread_condattr_init (&condattr), 0);
+ TEST_COMPARE (pthread_condattr_setclock (&condattr, cl), 0);
clockid_t cl2;
- if (pthread_condattr_getclock (&condattr, &cl2) != 0)
- {
- puts ("condattr_getclock failed");
- return 1;
- }
- if (cl != cl2)
- {
- printf ("condattr_getclock returned wrong value: %d, expected %d\n",
- (int) cl2, (int) cl);
- return 1;
- }
-
- if (pthread_cond_init (&cond, &condattr) != 0)
- {
- puts ("cond_init failed");
- return 1;
- }
-
- if (pthread_condattr_destroy (&condattr) != 0)
- {
- puts ("condattr_destroy failed");
- return 1;
- }
-
- if (pthread_mutexattr_init (&mutattr) != 0)
- {
- puts ("mutexattr_init failed");
- return 1;
- }
-
- if (pthread_mutexattr_settype (&mutattr, PTHREAD_MUTEX_ERRORCHECK) != 0)
- {
- puts ("mutexattr_settype failed");
- return 1;
- }
-
- if (pthread_mutex_init (&mut, &mutattr) != 0)
- {
- puts ("mutex_init failed");
- return 1;
- }
-
- if (pthread_mutexattr_destroy (&mutattr) != 0)
- {
- puts ("mutexattr_destroy failed");
- return 1;
- }
-
- if (pthread_mutex_lock (&mut) != 0)
- {
- puts ("mutex_lock failed");
- return 1;
- }
-
- if (pthread_mutex_lock (&mut) != EDEADLK)
- {
- puts ("2nd mutex_lock did not return EDEADLK");
- return 1;
- }
-
- struct timespec ts;
- if (clock_gettime (cl, &ts) != 0)
- {
- puts ("clock_gettime failed");
- return 1;
- }
+ TEST_COMPARE (pthread_condattr_getclock (&condattr, &cl2), 0);
+ TEST_COMPARE (cl, cl2);
+
+ TEST_COMPARE (pthread_cond_init (&cond, &condattr), 0);
+ TEST_COMPARE (pthread_condattr_destroy (&condattr), 0);
+
+ xpthread_mutexattr_init (&mutattr);
+ xpthread_mutexattr_settype (&mutattr, PTHREAD_MUTEX_ERRORCHECK);
+ xpthread_mutex_init (&mut, &mutattr);
+ xpthread_mutexattr_destroy (&mutattr);
+
+ xpthread_mutex_lock (&mut);
+ TEST_COMPARE (pthread_mutex_lock (&mut), EDEADLK);
+
+ struct timespec ts_timeout;
+ xclock_gettime (cl, &ts_timeout);
/* Wait one second. */
- ++ts.tv_sec;
-
- int e = pthread_cond_timedwait (&cond, &mut, &ts);
- if (e == 0)
- {
- puts ("cond_timedwait succeeded");
- return 1;
- }
- else if (e != ETIMEDOUT)
- {
- puts ("cond_timedwait did not return ETIMEDOUT");
- return 1;
- }
-
- struct timespec ts2;
- if (clock_gettime (cl, &ts2) != 0)
- {
- puts ("second clock_gettime failed");
- return 1;
- }
-
- if (ts2.tv_sec < ts.tv_sec
- || (ts2.tv_sec == ts.tv_sec && ts2.tv_nsec < ts.tv_nsec))
- {
- puts ("timeout too short");
- return 1;
- }
-
- if (pthread_mutex_unlock (&mut) != 0)
- {
- puts ("mutex_unlock failed");
- return 1;
- }
-
- if (pthread_mutex_destroy (&mut) != 0)
- {
- puts ("mutex_destroy failed");
- return 1;
- }
-
- if (pthread_cond_destroy (&cond) != 0)
- {
- puts ("cond_destroy failed");
- return 1;
- }
+ ++ts_timeout.tv_sec;
+
+ TEST_COMPARE (pthread_cond_timedwait (&cond, &mut, &ts_timeout), ETIMEDOUT);
+ TEST_TIMESPEC_BEFORE_NOW (ts_timeout, cl);
+
+ xpthread_mutex_unlock (&mut);
+ xpthread_mutex_destroy (&mut);
+ TEST_COMPARE (pthread_cond_destroy (&cond), 0);
return 0;
}
@@ -171,12 +79,11 @@ do_test (void)
{
#if !defined _POSIX_CLOCK_SELECTION || _POSIX_CLOCK_SELECTION == -1
- puts ("_POSIX_CLOCK_SELECTION not supported, test skipped");
- return 0;
+ FAIL_UNSUPPORTED ("_POSIX_CLOCK_SELECTION not supported, test skipped");
#else
- int res = run_test (CLOCK_REALTIME);
+ run_test (CLOCK_REALTIME);
# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
# if _POSIX_MONOTONIC_CLOCK == 0
@@ -184,20 +91,16 @@ do_test (void)
if (e < 0)
puts ("CLOCK_MONOTONIC not supported");
else if (e == 0)
- {
- puts ("sysconf (_SC_MONOTONIC_CLOCK) must not return 0");
- res = 1;
- }
+ FAIL_RET ("sysconf (_SC_MONOTONIC_CLOCK) must not return 0");
else
# endif
- res |= run_test (CLOCK_MONOTONIC);
+ run_test (CLOCK_MONOTONIC);
# else
puts ("_POSIX_MONOTONIC_CLOCK not defined");
# endif
- return res;
+ return 0;
#endif
}
-#define TEST_FUNCTION do_test ()
-#include "../test-skeleton.c"
+#include <support/test-driver.c>
diff --git a/support/Makefile b/support/Makefile
index 05865fe..64044f6 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -71,6 +71,9 @@ libsupport-routines = \
support_test_main \
support_test_verify_impl \
temp_file \
+ timespec \
+ timespec-add \
+ timespec-sub \
write_message \
xaccept \
xaccept4 \
diff --git a/support/README b/support/README
index d82f472..ae2c41c 100644
--- a/support/README
+++ b/support/README
@@ -28,3 +28,8 @@ header files provide related declarations:
* check.h
* temp_file.h
* test-driver.h
+
+For tests that make use of struct timespec, the following header files
+contain additional macros and helper functions:
+
+* timespec.h
diff --git a/support/timespec-add.c b/support/timespec-add.c
new file mode 100644
index 0000000..be7a590
--- /dev/null
+++ b/support/timespec-add.c
@@ -0,0 +1,71 @@
+/* Add two struct timespec values.
+ Copyright (C) 2011-2019 Free Software Foundation, Inc.
+ This file is part of the GNU C Library and is also part of gnulib.
+ Patches to this file should be submitted to both projects.
+
+ 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/>. */
+
+/* Return the sum of two timespec values A and B. On overflow, return
+ an extremal value. This assumes 0 <= tv_nsec < TIMESPEC_HZ. */
+
+#include <config.h>
+#include "timespec.h"
+
+#include "intprops.h"
+
+struct timespec
+timespec_add (struct timespec a, struct timespec b)
+{
+ time_t rs = a.tv_sec;
+ time_t bs = b.tv_sec;
+ int ns = a.tv_nsec + b.tv_nsec;
+ int nsd = ns - TIMESPEC_HZ;
+ int rns = ns;
+ time_t tmin = TYPE_MINIMUM (time_t);
+ time_t tmax = TYPE_MAXIMUM (time_t);
+
+ if (0 <= nsd)
+ {
+ rns = nsd;
+ if (bs < tmax)
+ bs++;
+ else if (rs < 0)
+ rs++;
+ else
+ goto high_overflow;
+ }
+
+ /* INT_ADD_WRAPV is not appropriate since time_t might be unsigned.
+ In theory time_t might be narrower than int, so plain
+ INT_ADD_OVERFLOW does not suffice. */
+ if (! INT_ADD_OVERFLOW (rs, bs) && tmin <= rs + bs && rs + bs <= tmax)
+ rs += bs;
+ else
+ {
+ if (rs < 0)
+ {
+ rs = tmin;
+ rns = 0;
+ }
+ else
+ {
+ high_overflow:
+ rs = tmax;
+ rns = TIMESPEC_HZ - 1;
+ }
+ }
+
+ return make_timespec (rs, rns);
+}
diff --git a/support/timespec-sub.c b/support/timespec-sub.c
new file mode 100644
index 0000000..bf95c7f
--- /dev/null
+++ b/support/timespec-sub.c
@@ -0,0 +1,71 @@
+/* Subtract two struct timespec values.
+ Copyright (C) 2011-2019 Free Software Foundation, Inc.
+ This file is part of the GNU C Library and is also part of gnulib.
+ Patches to this file should be submitted to both projects.
+
+ 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/>. */
+
+/* Return the difference between two timespec values A and B. On
+ overflow, return an extremal value. This assumes 0 <= tv_nsec <
+ TIMESPEC_HZ. */
+
+#include <config.h>
+#include "timespec.h"
+
+#include "intprops.h"
+
+struct timespec
+timespec_sub (struct timespec a, struct timespec b)
+{
+ time_t rs = a.tv_sec;
+ time_t bs = b.tv_sec;
+ int ns = a.tv_nsec - b.tv_nsec;
+ int rns = ns;
+ time_t tmin = TYPE_MINIMUM (time_t);
+ time_t tmax = TYPE_MAXIMUM (time_t);
+
+ if (ns < 0)
+ {
+ rns = ns + TIMESPEC_HZ;
+ if (bs < tmax)
+ bs++;
+ else if (- TYPE_SIGNED (time_t) < rs)
+ rs--;
+ else
+ goto low_overflow;
+ }
+
+ /* INT_SUBTRACT_WRAPV is not appropriate since time_t might be unsigned.
+ In theory time_t might be narrower than int, so plain
+ INT_SUBTRACT_OVERFLOW does not suffice. */
+ if (! INT_SUBTRACT_OVERFLOW (rs, bs) && tmin <= rs - bs && rs - bs <= tmax)
+ rs -= bs;
+ else
+ {
+ if (rs < 0)
+ {
+ low_overflow:
+ rs = tmin;
+ rns = 0;
+ }
+ else
+ {
+ rs = tmax;
+ rns = TIMESPEC_HZ - 1;
+ }
+ }
+
+ return make_timespec (rs, rns);
+}
diff --git a/support/timespec.c b/support/timespec.c
new file mode 100644
index 0000000..f1b88c1
--- /dev/null
+++ b/support/timespec.c
@@ -0,0 +1,58 @@
+/* Support code for timespec checks.
+ Copyright (C) 2019 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 <support/timespec.h>
+#include <stdio.h>
+
+void
+test_timespec_before_impl (const char *file, int line,
+ const struct timespec left,
+ const struct timespec right)
+{
+ if (left.tv_sec > right.tv_sec
+ || (left.tv_sec == right.tv_sec
+ && left.tv_nsec > right.tv_nsec)) {
+ support_record_failure ();
+ const struct timespec diff = timespec_sub (left, right);
+ printf ("%s:%d: %ld.%09lds not before %ld.%09lds "
+ "(difference %ld.%09lds)n",
+ file, line,
+ left.tv_sec, left.tv_nsec,
+ right.tv_sec, right.tv_nsec,
+ diff.tv_sec, diff.tv_nsec);
+ }
+}
+
+void
+test_timespec_equal_or_after_impl (const char *file, int line,
+ const struct timespec left,
+ const struct timespec right)
+{
+ if (left.tv_sec < right.tv_sec
+ || (left.tv_sec == right.tv_sec
+ && left.tv_nsec < right.tv_nsec)) {
+ support_record_failure ();
+ const struct timespec diff = timespec_sub (right, left);
+ printf ("%s:%d: %ld.%09lds not after %ld.%09lds "
+ "(difference %ld.%09lds)n",
+ file, line,
+ left.tv_sec, left.tv_nsec,
+ right.tv_sec, right.tv_nsec,
+ diff.tv_sec, diff.tv_nsec);
+ }
+}
diff --git a/support/timespec.h b/support/timespec.h
new file mode 100644
index 0000000..4a8b341
--- /dev/null
+++ b/support/timespec.h
@@ -0,0 +1,79 @@
+/* Useful functions for tests that use struct timespec.
+ Copyright (C) 2019 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/>. */
+
+#ifndef SUPPORT_TIMESPEC_H
+#define SUPPORT_TIMESPEC_H
+
+#include <stdio.h>
+#include <time.h>
+#include <support/check.h>
+#include <support/xtime.h>
+
+struct timespec timespec_add (struct timespec, struct timespec)
+ __attribute__((const));
+struct timespec timespec_sub (struct timespec, struct timespec)
+ __attribute__((const));
+
+static inline struct timespec
+make_timespec (time_t s, long int ns)
+{
+ struct timespec r;
+ r.tv_sec = s;
+ r.tv_nsec = ns;
+ return r;
+}
+
+enum { TIMESPEC_HZ = 1000000000 };
+
+void test_timespec_before_impl (const char *file, int line,
+ const struct timespec left,
+ const struct timespec right);
+
+void test_timespec_equal_or_after_impl (const char *file, int line,
+ const struct timespec left,
+ const struct timespec right);
+
+/* Check that the timespec on the left represents a time before the
+ time on the right. */
+#define TEST_TIMESPEC_BEFORE(left, right) \
+ test_timespec_before_impl (__FILE__, __LINE__, (left), (right))
+
+#define TEST_TIMESPEC_BEFORE_NOW(left, clockid) \
+ ({ \
+ struct timespec now; \
+ const int saved_errno = errno; \
+ xclock_gettime ((clockid), &now); \
+ TEST_TIMESPEC_BEFORE ((left), now); \
+ errno = saved_errno; \
+ })
+
+/* Check that the timespec on the left represents a after before the
+ time on the right. */
+#define TEST_TIMESPEC_EQUAL_OR_AFTER(left, right) \
+ test_timespec_equal_or_after_impl (__FILE__, __LINE__, left, right)
+
+#define TEST_TIMESPEC_NOW_OR_AFTER(clockid, right) \
+ ({ \
+ struct timespec now; \
+ const int saved_errno = errno; \
+ xclock_gettime ((clockid), &now); \
+ TEST_TIMESPEC_EQUAL_OR_AFTER (now, (right)); \
+ errno = saved_errno; \
+ })
+
+#endif /* SUPPORT_TIMESPEC_H */
--
git-series 0.9.1