From: Ivan Maidanski <ivmai@mail.ru>
Date: Wed, 10 Jul 2013 08:19:09 +0000 (+0400)
Subject: Check that SIG_SUSPEND and SIG_THR_RESTART are different (Pthreads)
X-Git-Tag: gc7_4_0~59
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4c636aa96c80d80d0758d49a1ee67c4e6fe3f65f;p=gc

Check that SIG_SUSPEND and SIG_THR_RESTART are different (Pthreads)

* pthread_stop_world.c (GC_stop_init): Add a check that GC_sig_suspend
value differs from that of GC_sig_thr_restart (abort otherwise).
---

diff --git a/pthread_stop_world.c b/pthread_stop_world.c
index 9d31c141..e633b0f6 100644
--- a/pthread_stop_world.c
+++ b/pthread_stop_world.c
@@ -883,6 +883,8 @@ GC_INNER void GC_stop_init(void)
       act.sa_handler = GC_suspend_handler;
 #   endif
     /* act.sa_restorer is deprecated and should not be initialized. */
+    if (GC_sig_suspend == GC_sig_thr_restart)
+        ABORT("Cannot use same signal for thread suspend and resume");
     if (sigaction(GC_sig_suspend, &act, NULL) != 0) {
         ABORT("Cannot set SIG_SUSPEND handler");
     }