merge revision(s) 54000: [Backport #12148]

	* 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/branches/ruby_2_1@54264 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 11 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 2f03a1ca97..67ee3b978d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Mar 25 17:28:13 2016  Rei Odaira  <Rei.Odaira@gmail.com>
+
+	* thread_pthread.c (getstack): __pi_stacksize returned by
+	  pthread_getthrds_np() is wrong on AIX. Use
+	  __pi_stackend - __pi_stackaddr instead.
+
 Fri Mar 25 17:21:51 2016  Alex Boyd  <alex@opengroove.org>
 
 	* lib/irb.rb: avoid to needless truncation when using back_trace_limit option.
diff --git a/thread_pthread.c b/thread_pthread.c
index 968c644897..47e94156e1 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -608,7 +608,10 @@ 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));
 #else
 #error STACKADDR_AVAILABLE is defined but not implemented.
diff --git a/version.h b/version.h
index d41887e7b3..30bd508393 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.1.9"
 #define RUBY_RELEASE_DATE "2016-03-25"
-#define RUBY_PATCHLEVEL 461
+#define RUBY_PATCHLEVEL 462
 
 #define RUBY_RELEASE_YEAR 2016
 #define RUBY_RELEASE_MONTH 3