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/* Test of c-stack module.
Copyright (C) 2002, 2004, 2006, 2008-2020 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include "c-stack.h"
#include "exitfail.h"
#include <stdio.h>
#if HAVE_SETRLIMIT
/* At least FreeBSD 5.0 needs extra headers before <sys/resource.h>
will compile. */
# include <sys/types.h>
# include <sys/time.h>
# include <sys/resource.h>
#endif
#include "macros.h"
static volatile int *
recurse_1 (volatile int n, volatile int *p)
{
if (n >= 0)
*recurse_1 (n + 1, p) += n;
return p;
}
static int
recurse (volatile int n)
{
int sum = 0;
return *recurse_1 (n, &sum);
}
int
main (int argc, char **argv)
{
#if HAVE_SETRLIMIT && defined RLIMIT_STACK
/* Before starting the endless recursion, try to be friendly to the
user's machine. On some Linux 2.2.x systems, there is no stack
limit for user processes at all. We don't want to kill such
systems. */
struct rlimit rl;
rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
setrlimit (RLIMIT_STACK, &rl);
#endif
if (c_stack_action (NULL) == 0)
{
if (1 < argc)
{
exit_failure = 77;
++*argv[argc]; /* Intentionally dereference NULL. */
}
return recurse (0);
}
fputs ("skipping test: ", stderr);
perror ("c_stack_action");
return 77;
}
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