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(AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC): Limit stack size

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to 1MB, so as not to render systems with no stack size limit (e.g.,
linux-2.2.x) unusable.  Suggestion and code from Bruno Haible.
This commit is contained in:
Jim Meyering 2003-02-19 08:39:55 +00:00
parent 3ac28e3dee
commit 3ef0832f7a
1 changed files with 16 additions and 0 deletions
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16
m4/c-stack.m4
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@ -22,6 +22,7 @@
AC_DEFUN([AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC],
[# for STACK_DIRECTION
AC_REQUIRE([AC_FUNC_ALLOCA])
AC_CHECK_FUNCS(setrlimit)
AC_CACHE_CHECK([for working C stack overflow detection],
ac_cv_sys_xsi_stack_overflow_heuristic,
@ -30,6 +31,11 @@ AC_DEFUN([AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC],
#include <unistd.h>
#include <signal.h>
#include <ucontext.h>
#if HAVE_SETRLIMIT
# include <sys/types.h>
# include <sys/time.h>
# include <sys/resource.h>
#endif
static union
{
@ -102,6 +108,16 @@ AC_DEFUN([AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC],
int
main (void)
{
#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
c_stack_action ();
return recurse ("\1");
}