From: Jakub Jelinek <jakub@redhat.com>
To: Ulrich Drepper <drepper@redhat.com>, Roland McGrath <roland@redhat.com>
Cc: Glibc hackers <libc-hacker@sources.redhat.com>
Subject: [PATCH] Fix linuxthreads when spawned from programs using NPTL
Date: Thu, 03 Apr 2003 14:03:00 -0000 [thread overview]
Message-ID: <20030403140323.GR16629@sunsite.ms.mff.cuni.cz> (raw)
Hi!
If a linuxthreads programs is spawned from a threaded NPTL program
(such as gnome-terminal, konsole etc.), bad things happen as
since 2003-03-25 NPTL blocks __SIGRTMIN+1, so all LT threads
but the manager (which does SIG_SETMASK at the very end) never receive
__pthread_sig_cancel.
2003-04-03 Jakub Jelinek <jakub@redhat.com>
* pthread.c (pthread_initialize): Unblock __pthread_sig_cancel
in case the parent blocked it.
--- linuxthreads/pthread.c.jj 2003-04-03 07:16:43.000000000 -0500
+++ linuxthreads/pthread.c 2003-04-03 08:38:29.000000000 -0500
@@ -550,6 +550,10 @@ static void pthread_initialize(void)
sigemptyset(&mask);
sigaddset(&mask, __pthread_sig_restart);
sigprocmask(SIG_BLOCK, &mask, NULL);
+ /* And unblock __pthread_sig_cancel if it has been blocked. */
+ sigdelset(&mask, __pthread_sig_restart);
+ sigaddset(&mask, __pthread_sig_cancel);
+ sigprocmask(SIG_UNBLOCK, &mask, NULL);
/* Register an exit function to kill all other threads. */
/* Do it early so that user-registered atexit functions are called
before pthread_*exit_process. */
Jakub
next reply other threads:[~2003-04-03 14:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-03 14:03 Jakub Jelinek [this message]
2003-04-03 18:55 ` Ulrich Drepper
2003-04-03 20:16 ` Roland McGrath
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