From b2f97ef05e9b250dadc0dc72494a4523dca81d67 Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 17 Jun 2009 03:56:29 +0000
Subject: * thread.c (ruby_thread_stack_overflow): call rb_exc_raise() on  
 stack overflows in the signal handler, if sigaltstack is   available.  On
 stack overflow (and with sigaltstack), the signal   handler is more likely to
 have room to create an exception   object.  [ruby-core:23813]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@23720 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 thread.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'thread.c')

diff --git a/thread.c b/thread.c
index efe5d02dd..63706c980 100644
--- a/thread.c
+++ b/thread.c
@@ -1300,12 +1300,21 @@ rb_threadptr_signal_exit(rb_thread_t *th)
     rb_threadptr_raise(th->vm->main_thread, 2, argv);
 }
 
+#if defined(POSIX_SIGNAL) && defined(SIGSEGV) && defined(HAVE_SIGALTSTACK)
+#define USE_SIGALTSTACK
+#endif
+
 void
 ruby_thread_stack_overflow(rb_thread_t *th)
 {
-    th->errinfo = sysstack_error;
     th->raised_flag = 0;
+#ifdef USE_SIGALTSTACK
+    th->raised_flag = 0;
+    rb_exc_raise(sysstack_error);
+#else
+    th->errinfo = sysstack_error;
     TH_JUMP_TAG(th, TAG_RAISE);
+#endif
 }
 
 int
-- 
cgit