[Isolates] Pass current isolate address to the regexp native functions

src/ia32/regexp-macro-assembler-ia32.cc

Index: src/ia32/regexp-macro-assembler-ia32.cc
diff --git a/src/ia32/regexp-macro-assembler-ia32.cc b/src/ia32/regexp-macro-assembler-ia32.cc
index e18638ee0207e4ef086102c322ca24f32f234fef..aa7f19964c512e5f80ad7e42d37a3c29aa772a87 100644
--- a/src/ia32/regexp-macro-assembler-ia32.cc
+++ b/src/ia32/regexp-macro-assembler-ia32.cc
@@ -56,6 +56,7 @@ namespace internal {
  *
  * Each call to a public method should retain this convention.
  * The stack will have the following structure:
+ *       - Isolate* isolate     (Address of the current isolate)
  *       - direct_call          (if 1, direct call from JavaScript code, if 0
  *                               call through the runtime system)
  *       - stack_area_base      (High end of the memory area to use as
@@ -1031,7 +1032,8 @@ static T& frame_entry(Address re_frame, int frame_offset) {
 int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address,
                                                    Code* re_code,
                                                    Address re_frame) {
-  Isolate* isolate = Isolate::Current();
+  Isolate* isolate = frame_entry<Isolate*>(re_frame, kIsolate);
+  ASSERT(isolate == Isolate::Current());
   if (isolate->stack_guard()->IsStackOverflow()) {
     isolate->StackOverflow();
     return EXCEPTION;