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ruby-changes:12053

From: matz <ko1@a...>
Date: Wed, 17 Jun 2009 12:56:46 +0900 (JST)
Subject: [ruby-changes:12053] Ruby:r23720 (trunk): * thread.c (ruby_thread_stack_overflow): call rb_exc_raise() on

matz	2009-06-17 12:56:29 +0900 (Wed, 17 Jun 2009)

  New Revision: 23720

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=23720

  Log:
    * 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]

  Modified files:
    trunk/ChangeLog
    trunk/thread.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 23719)
+++ ChangeLog	(revision 23720)
@@ -1,3 +1,11 @@
+Wed Jun 17 12:37:37 2009  Yukihiro Matsumoto  <matz@r...>
+
+	* 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]
+
 Wed Jun 17 08:10:38 2009  Koichi Sasada  <ko1@a...>
 
 	* ext/objspace: added.  objspace library extends some methods to
Index: thread.c
===================================================================
--- thread.c	(revision 23719)
+++ thread.c	(revision 23720)
@@ -1300,12 +1300,21 @@
     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->raised_flag = 0;
+#ifdef USE_SIGALTSTACK
+    th->raised_flag = 0;
+    rb_exc_raise(sysstack_error);
+#else
     th->errinfo = sysstack_error;
-    th->raised_flag = 0;
     TH_JUMP_TAG(th, TAG_RAISE);
+#endif
 }
 
 int

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