Add a test for multiple setcontext calls

Check multiple setcontext calls.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>.
	* stdlib/Makefile ((tests): Add tst-setcontext5.
	* stdlib/tst-setcontext5.c: New file.

diff --git a/ChangeLog b/ChangeLog
index 86e66efaae8db3445728ed6316d7e1556bf18191..6935bc3b09a35eea11beb95efa73ef94c038b423 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-07-25  H.J. Lu  <hongjiu.lu@intel.com>
+
+       * stdlib/Makefile ((tests): Add tst-setcontext5.
+       * stdlib/tst-setcontext5.c: New file.
+
 2018-07-25  H.J. Lu  <hongjiu.lu@intel.com>
 
        * stdlib/Makefile (tests): Add tst-setcontext4.

diff --git a/stdlib/Makefile b/stdlib/Makefile
index e3f20935442bb07abcaa925718a0a01b55995f96..403ca22f49ac49be6cf5ed68545b109b1a3308e1 100644 (file)
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -85,7 +85,7 @@ tests         := tst-strtol tst-strtod testmb testrand testsort testdiv   \
                   test-at_quick_exit-race test-cxa_atexit-race             \
                   test-on_exit-race test-dlclose-exit-race                 \
                   tst-makecontext-align test-bz22786 tst-strtod-nan-sign \
-                  tst-swapcontext1 tst-setcontext4
+                  tst-swapcontext1 tst-setcontext4 tst-setcontext5
 
 tests-internal := tst-strtod1i tst-strtod3 tst-strtod4 tst-strtod5i \
                   tst-tls-atexit tst-tls-atexit-nodelete

diff --git a/stdlib/tst-setcontext5.c b/stdlib/tst-setcontext5.c
new file mode 100644 (file)
index 0000000..7dcc15c
--- /dev/null
+++ b/stdlib/tst-setcontext5.c
@@ -0,0 +1,88 @@
+/* Check multiple setcontext calls.
+   Copyright (C) 2018 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 <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+static ucontext_t ctx[2];
+static volatile int done;
+
+static void f2 (void);
+
+static void
+__attribute__ ((noinline, noclone))
+f1 (void)
+{
+  printf ("start f1\n");
+  f2 ();
+}
+
+static void
+__attribute__ ((noinline, noclone))
+f2 (void)
+{
+  printf ("start f2\n");
+  if (setcontext (&ctx[1]) != 0)
+    {
+      printf ("%s: setcontext: %m\n", __FUNCTION__);
+      exit (EXIT_FAILURE);
+    }
+}
+
+static void
+f3 (void)
+{
+  printf ("start f3\n");
+  if (done)
+    exit (EXIT_SUCCESS);
+  done = 1;
+  if (setcontext (&ctx[0]) != 0)
+    {
+      printf ("%s: setcontext: %m\n", __FUNCTION__);
+      exit (EXIT_FAILURE);
+    }
+}
+
+static int
+do_test (void)
+{
+  char st1[32768];
+
+  puts ("making contexts");
+  if (getcontext (&ctx[0]) != 0)
+    {
+      printf ("%s: getcontext: %m\n", __FUNCTION__);
+      exit (EXIT_FAILURE);
+    }
+  if (getcontext (&ctx[1]) != 0)
+    {
+      printf ("%s: getcontext: %m\n", __FUNCTION__);
+      exit (EXIT_FAILURE);
+    }
+  ctx[1].uc_stack.ss_sp = st1;
+  ctx[1].uc_stack.ss_size = sizeof st1;
+  ctx[1].uc_link = &ctx[0];
+  makecontext (&ctx[1], (void (*) (void)) f3, 0);
+  f1 ();
+  puts ("FAIL: returned from f1 ()");
+  exit (EXIT_FAILURE);
+}
+
+#include <support/test-driver.c>