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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.
This commit is contained in:
H.J. Lu 2018-07-25 05:00:30 -07:00
parent 7e28f20345
commit bd4f7903df
3 changed files with 94 additions and 1 deletions
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5
ChangeLog
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@ -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.

2
stdlib/Makefile
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@ -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

88
stdlib/tst-setcontext5.c Normal file
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@ -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>