From 01a5bb58f8284fa3d0b1d030e131d0a0675cd01f Mon Sep 17 00:00:00 2001
From: odaira <odaira@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 4 Mar 2016 18:14:18 +0000
Subject: * thread_pthread.c (getstack): __pi_stacksize returned by  
 pthread_getthrds_np() is wrong on AIX. Use   __pi_stackend - __pi_stackaddr
 instead.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54000 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 thread_pthread.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'thread_pthread.c')

diff --git a/thread_pthread.c b/thread_pthread.c
index 738ad57ce0..ef43b369e7 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -619,7 +619,10 @@ get_stack(void **addr, size_t *size)
 				   &thinfo, sizeof(thinfo),
 				   &reg, &regsiz));
     *addr = thinfo.__pi_stackaddr;
-    *size = thinfo.__pi_stacksize;
+    /* Must not use thinfo.__pi_stacksize for size.
+       It is around 3KB smaller than the correct size
+       calculated by thinfo.__pi_stackend - thinfo.__pi_stackaddr. */
+    *size = thinfo.__pi_stackend - thinfo.__pi_stackaddr;
     STACK_DIR_UPPER((void)0, (void)(*addr = (char *)*addr + *size));
 #elif defined __HAIKU__
     thread_info info;
-- 
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