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-rw-r--r--ChangeLog4
-rw-r--r--gc.h1
-rw-r--r--thread_pthread.c2
3 files changed, 5 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index 55ebea5c87..525c696b98 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Sun Jun 10 17:54:31 2012 Nobuyoshi Nakada <nobu@ruby-lang.org>
+Sun Jun 10 17:54:36 2012 Nobuyoshi Nakada <nobu@ruby-lang.org>
+
+ * gc.h (IS_STACK_DIR_UPPER): utility macro.
* thread_pthread.c (get_stack): seems stack size does not include
guard size on Mac OS X.
diff --git a/gc.h b/gc.h
index 094b941061..96d22a6e09 100644
--- a/gc.h
+++ b/gc.h
@@ -81,6 +81,7 @@ int ruby_get_stack_grow_direction(volatile VALUE *addr);
#define STACK_GROW_DIR_DETECTION VALUE stack_grow_dir_detection
#define STACK_DIR_UPPER(a,b) STACK_UPPER(&stack_grow_dir_detection, (a), (b))
#endif
+#define IS_STACK_DIR_UPPER() STACK_DIR_UPPER(1,0)
#if defined __GNUC__ && __GNUC__ >= 4
#pragma GCC visibility push(default)
diff --git a/thread_pthread.c b/thread_pthread.c
index 0a37f2fa30..383d41b732 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -1342,7 +1342,7 @@ ruby_stack_overflowed_p(const rb_thread_t *th, const void *addr)
}
size /= 5;
if (size > water_mark) size = water_mark;
- if (STACK_DIR_UPPER(1, 0)) {
+ if (IS_STACK_DIR_UPPER()) {
if (size > ~(size_t)base+1) size = ~(size_t)base+1;
if (addr > base && addr <= (void *)((char *)base + size)) return 1;
}