From 1b5d3c0b9d8a984157160c860661a7723a4a5a7f Mon Sep 17 00:00:00 2001 From: Eric Wong Date: Tue, 18 Feb 2014 07:31:52 +0000 Subject: gc.c: try to make GC guard stronger for non-GCC/MSC --- gc.c | 8 ++++++-- include/ruby/ruby.h | 8 ++++++-- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/gc.c b/gc.c index fc85cd4cee..7f9e54f08a 100644 --- a/gc.c +++ b/gc.c @@ -88,10 +88,14 @@ #define rb_setjmp(env) RUBY_SETJMP(env) #define rb_jmp_buf rb_jmpbuf_t -#if defined(HAVE_RB_GC_GUARDED_PTR) && HAVE_RB_GC_GUARDED_PTR +#if defined(HAVE_RB_GC_GUARDED_PTR_VAL) && HAVE_RB_GC_GUARDED_PTR_VAL +/* trick the compiler into thinking a external signal handler uses this */ +volatile VALUE rb_gc_guarded_val; volatile VALUE * -rb_gc_guarded_ptr(volatile VALUE *ptr) +rb_gc_guarded_ptr_val(volatile VALUE *ptr, VALUE val) { + rb_gc_guarded_val = val; + return ptr; } #endif diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h index 55ea252d98..abd4b4bad3 100644 --- a/include/ruby/ruby.h +++ b/include/ruby/ruby.h @@ -515,12 +515,16 @@ static inline int rb_type(VALUE obj); static inline volatile VALUE *rb_gc_guarded_ptr(volatile VALUE *ptr) {return ptr;} #pragma optimize("", on) #else -volatile VALUE *rb_gc_guarded_ptr(volatile VALUE *ptr); -#define HAVE_RB_GC_GUARDED_PTR 1 +volatile VALUE *rb_gc_guarded_ptr_val(volatile VALUE *ptr, VALUE val); +#define HAVE_RB_GC_GUARDED_PTR_VAL 1 +#define RB_GC_GUARD(v) (*rb_gc_guarded_ptr_val(&(v),(v))) #endif #define RB_GC_GUARD_PTR(ptr) rb_gc_guarded_ptr(ptr) #endif + +#ifndef RB_GC_GUARD #define RB_GC_GUARD(v) (*RB_GC_GUARD_PTR(&(v))) +#endif #ifdef __GNUC__ #define RB_UNUSED_VAR(x) x __attribute__ ((unused)) -- cgit v1.2.3-24-ge0c7