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ruby.h: RB_GC_GUARD stronger than gcc7

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* include/ruby/ruby.h (RB_GC_GUARD): prevent guarded pointer from
  optimization by using as an input to inline asm.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57619 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-02-13 08:14:19 +00:00
parent 959aac29e7
commit 9eb54f7fb4
2 changed files with 7 additions and 3 deletions
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6
include/ruby/ruby.h
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@ -536,7 +536,11 @@ static inline int rb_type(VALUE obj);
#ifdef __GNUC__
#define RB_GC_GUARD(v) \
(*__extension__ ({volatile VALUE *rb_gc_guarded_ptr = &(v); rb_gc_guarded_ptr;}))
(*__extension__ ({ \
volatile VALUE *rb_gc_guarded_ptr = &(v); \
__asm__("### RB_GC_GUARD("#v")" : : "m"(rb_gc_guarded_ptr)); \
rb_gc_guarded_ptr; \
}))
#elif defined _MSC_VER
#pragma optimize("", off)
static inline volatile VALUE *rb_gc_guarded_ptr(volatile VALUE *ptr) {return ptr;}

4
marshal.c
View file

@ -1024,7 +1024,7 @@ VALUE
rb_marshal_dump_limited(VALUE obj, VALUE port, int limit)
{
struct dump_arg *arg;
volatile VALUE wrapper; /* used to avoid memory leak in case of exception */
VALUE wrapper; /* used to avoid memory leak in case of exception */
wrapper = TypedData_Make_Struct(rb_cData, struct dump_arg, &dump_arg_data, arg);
arg->dest = 0;
@ -2038,7 +2038,7 @@ rb_marshal_load_with_proc(VALUE port, VALUE proc)
{
int major, minor, infection = 0;
VALUE v;
volatile VALUE wrapper; /* used to avoid memory leak in case of exception */
VALUE wrapper; /* used to avoid memory leak in case of exception */
struct load_arg *arg;
v = rb_check_string_type(port);