From: Ivan Maidanski <ivmai@mail.ru>
Date: Fri, 1 Jul 2016 07:41:16 +0000 (+0300)
Subject: Fix 'arg parameter might be clobbered by setjmp' compiler warning
X-Git-Tag: gc7_6_0~23
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8ffc3db1c56c4ef327538fe8a667a2abebbce773;p=gc

Fix 'arg parameter might be clobbered by setjmp' compiler warning

* mach_dep.c (GC_with_callee_saves_pushed): Make "arg" parameter
volatile (to prevent it from potential clobbering).
---

diff --git a/mach_dep.c b/mach_dep.c
index 29e0b8a7..0515a531 100644
--- a/mach_dep.c
+++ b/mach_dep.c
@@ -218,7 +218,7 @@
 /* are somewhere on the stack, and then call fn(arg, ctxt).             */
 /* ctxt is either a pointer to a ucontext_t we generated, or NULL.      */
 GC_INNER void GC_with_callee_saves_pushed(void (*fn)(ptr_t, void *),
-                                          ptr_t arg)
+                                          volatile ptr_t arg)
 {
     volatile int dummy;
     void * context = 0;