From 60e85501f20d6992a4dbf0b1930e87cfdf642295 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 27 Jan 2014 12:53:48 +0000
Subject: thread_pthread.c: get current main thread stack size

* thread_pthread.c: get current main thread stack size, which may
  be expanded than allocated size at initialization, by rlimit().
  [ruby-core:60113] [Bug #9454]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 thread_pthread.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'thread_pthread.c')

diff --git a/thread_pthread.c b/thread_pthread.c
index cf0e3705af..20c94d9185 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -1562,6 +1562,14 @@ ruby_stack_overflowed_p(const rb_thread_t *th, const void *addr)
 
     if (th) {
 	size = th->machine_stack_maxsize;
+#if defined(HAVE_GETRLIMIT) && MAINSTACKADDR_AVAILABLE
+	if (pthread_equal(th->thread_id, native_main_thread.id)) {
+	    struct rlimit rlim;
+	    if (getrlimit(RLIMIT_STACK, &rlim) == 0 && rlim.rlim_cur > size) {
+		size = rlim.rlim_cur;
+	    }
+	}
+#endif
 	base = (char *)th->machine_stack_start - STACK_DIR_UPPER(0, size);
     }
 #ifdef STACKADDR_AVAILABLE
-- 
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