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authorknu <knu@FreeBSD.org>2001-05-07 18:07:29 +0000
committerknu <knu@FreeBSD.org>2001-05-07 18:07:29 +0000
commitfa8314227c51816057f11e1672444bbae7baed35 (patch)
tree9e378daa5d9b1952f2899a84d55c20c4b1faaf26 /lib/libpthread
parent04a6a52217ab308220e97946befc2943eb93f68c (diff)
downloadFreeBSD-src-fa8314227c51816057f11e1672444bbae7baed35.zip
FreeBSD-src-fa8314227c51816057f11e1672444bbae7baed35.tar.gz
Properly copy the P_ALTSTACK flag in struct proc::p_flag to the child
process on fork(2). It is the supposed behavior stated in the manpage of sigaction(2), and Solaris, NetBSD and FreeBSD 3-STABLE correctly do so. The previous fix against libc_r/uthread/uthread_fork.c fixed the problem only for the programs linked with libc_r, so back it out and fix fork(2) itself to help those not linked with libc_r as well. PR: kern/26705 Submitted by: KUROSAWA Takahiro <fwkg7679@mb.infoweb.ne.jp> Tested by: knu, GOTOU Yuuzou <gotoyuzo@notwork.org>, and some other people Not objected by: hackers MFC in: 3 days
Diffstat (limited to 'lib/libpthread')
-rw-r--r--lib/libpthread/thread/thr_fork.c12
1 files changed, 1 insertions, 11 deletions
diff --git a/lib/libpthread/thread/thr_fork.c b/lib/libpthread/thread/thr_fork.c
index a2aabbe..4437d88 100644
--- a/lib/libpthread/thread/thr_fork.c
+++ b/lib/libpthread/thread/thr_fork.c
@@ -32,7 +32,6 @@
* $FreeBSD$
*/
#include <errno.h>
-#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
@@ -113,16 +112,7 @@ _fork(void)
else if (_pq_init(&_readyq) != 0) {
/* Abort this application: */
PANIC("Cannot initialize priority ready queue.");
- } else if ((_thread_sigstack.ss_sp == NULL) &&
- ((_thread_sigstack.ss_sp = malloc(SIGSTKSZ)) == NULL))
- PANIC("Unable to allocate alternate signal stack");
- else {
- /* Install the alternate signal stack: */
- _thread_sigstack.ss_size = SIGSTKSZ;
- _thread_sigstack.ss_flags = 0;
- if (__sys_sigaltstack(&_thread_sigstack, NULL) != 0)
- PANIC("Unable to install alternate signal stack");
-
+ } else {
/*
* Enter a loop to remove all threads other than
* the running thread from the thread list:
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