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

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

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 42 matching lines @@
  * - r10 : End of input (points to byte after last character in input).
  * - r11 : Frame pointer. Used to access arguments, local variables and
  *         RegExp registers.
  * - r12 : IP register, used by assembler. Very volatile.
  * - r13/sp : points to tip of C stack.
  *
  * The remaining registers are free for computations.
  *
  * 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
  *                             backtracking stack)
  *       - int* capture_array (int[num_saved_registers_], for output).
  *       --- sp when called ---
  *       - link address
  *       - backup of registers r4..r11
  *       - end of input       (Address of end of string)
  *       - start of input     (Address of first character in string)
@@ skipping 912 matching lines @@
 // Helper function for reading a value out of a stack frame.
 template <typename T>
 static T& frame_entry(Address re_frame, int frame_offset) {
   return reinterpret_cast<T&>(Memory::int32_at(re_frame + frame_offset));
 }
 
 
 int RegExpMacroAssemblerARM::CheckStackGuardState(Address* return_address,
                                                   Code* re_code,
                                                   Address re_frame) {
-  if (Isolate::Current()->stack_guard()->IsStackOverflow()) {
-    Isolate::Current()->StackOverflow();
+  Isolate* isolate = frame_entry<Isolate*>(re_frame, kIsolate);
+  ASSERT(isolate == Isolate::Current());
+  if (isolate->stack_guard()->IsStackOverflow()) {
+    isolate->StackOverflow();
     return EXCEPTION;
   }
 
   // If not real stack overflow the stack guard was used to interrupt
   // execution for another purpose.
 
   // If this is a direct call from JavaScript retry the RegExp forcing the call
   // through the runtime system. Currently the direct call cannot handle a GC.
   if (frame_entry<int>(re_frame, kDirectCall) == 1) {
     return RETRY;
@@ skipping 243 matching lines @@
   __ ldr(pc, MemOperand(sp, stack_alignment, PostIndex));
 }
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM