signal.c: get rid of heap corruption

* signal.c (rb_sigaltstack_size): double default size to get rid
  of heap corruption by alternate stack overflow in SEGV handler.
  typically happened at fprintf() in control_frame_dump().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/signal.c b/signal.c
index fd7ee1bc51..63c79ffcbd 100644
--- a/signal.c
+++ b/signal.c
@@ -535,7 +535,7 @@ int
 rb_sigaltstack_size(void)
 {
     /* XXX: BSD_vfprintf() uses >1500KiB stack and x86-64 need >5KiB stack. */
-    int size = 8192;
+    int size = 16*1024;
 
 #ifdef MINSIGSTKSZ
     if (size < MINSIGSTKSZ)