57 lines
1.3 KiB
Plaintext
57 lines
1.3 KiB
Plaintext
dnl #
|
|
dnl # Check if the glibc NPTL threading implementation includes the guard area
|
|
dnl # within the stack size allocation, rather than allocating extra space at
|
|
dnl # the end of the stack, as POSIX.1 requires.
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_CONFIG_USER_STACK_GUARD], [
|
|
|
|
AC_MSG_CHECKING([whether pthread stack includes guard])
|
|
|
|
saved_CFLAGS="$CFLAGS"
|
|
CFLAGS="-fstack-check"
|
|
saved_LDFLAGS="$LDFLAGS"
|
|
LDFLAGS="-lpthread"
|
|
|
|
AC_RUN_IFELSE(AC_LANG_PROGRAM(
|
|
[
|
|
#include <pthread.h>
|
|
#include <sys/resource.h>
|
|
#include <unistd.h>
|
|
#include <bits/local_lim.h>
|
|
|
|
#define PAGESIZE (sysconf(_SC_PAGESIZE))
|
|
#define STACK_SIZE 8192
|
|
#define BUFSIZE 4096
|
|
|
|
void * func(void *arg)
|
|
{
|
|
char buf[[[BUFSIZE]]];
|
|
}
|
|
],
|
|
[
|
|
pthread_t tid;
|
|
pthread_attr_t attr;
|
|
struct rlimit l;
|
|
|
|
l.rlim_cur = 0;
|
|
l.rlim_max = 0;
|
|
setrlimit(RLIMIT_CORE, &l);
|
|
pthread_attr_init(&attr);
|
|
pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN + STACK_SIZE);
|
|
pthread_attr_setguardsize(&attr, PAGESIZE);
|
|
pthread_create(&tid, &attr, func, NULL);
|
|
pthread_join(tid, NULL);
|
|
]),
|
|
[
|
|
AC_MSG_RESULT([no])
|
|
],
|
|
[
|
|
AC_DEFINE([NPTL_GUARD_WITHIN_STACK], 1,
|
|
[Define to 1 if NPTL threading implementation includes
|
|
guard area in stack allocation])
|
|
AC_MSG_RESULT([yes])
|
|
])
|
|
CFLAGS="$saved_CFLAGS"
|
|
LDFLAGS="$saved_LDFLAGS"
|
|
])
|