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authorkosaki <kosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2012-12-01 21:15:01 (GMT)
committerkosaki <kosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2012-12-01 21:15:01 (GMT)
commit2ba9cdcee6b0b97999c74c6fb19cdae08edd0e25 (patch)
tree47b6f10a8a3982f5ea3fb5f514274d05b5beaa28 /gc.h
parent5bdd03936c2a7fb5c835587535466ec76bf0ca9e (diff)
* gc.h (SET_MACHINE_STACK_END): add volatile for preventing
harmful optimization. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38134 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'gc.h')
-rw-r--r--gc.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/gc.h b/gc.h
index 2a3dd92..10f634e 100644
--- a/gc.h
+++ b/gc.h
@@ -3,9 +3,9 @@
#define RUBY_GC_H 1
#if defined(__x86_64__) && defined(__GNUC__) && !defined(__native_client__)
-#define SET_MACHINE_STACK_END(p) __asm__("movq\t%%rsp, %0" : "=r" (*(p)))
+#define SET_MACHINE_STACK_END(p) __asm__ volatile ("movq\t%%rsp, %0" : "=r" (*(p)))
#elif defined(__i386) && defined(__GNUC__) && !defined(__native_client__)
-#define SET_MACHINE_STACK_END(p) __asm__("movl\t%%esp, %0" : "=r" (*(p)))
+#define SET_MACHINE_STACK_END(p) __asm__ volatile ("movl\t%%esp, %0" : "=r" (*(p)))
#else
NOINLINE(void rb_gc_set_stack_end(VALUE **stack_end_p));
#define SET_MACHINE_STACK_END(p) rb_gc_set_stack_end(p)