Merge up to bleeding_edge r7201 to isolates branch.

src/deoptimizer.cc

 // Copyright 2010 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 909 matching lines @@
 
 
 void Deoptimizer::AddDoubleValue(int frame_index,
                                  int slot_index,
                                  double value) {
   ValueDescriptionDouble value_desc(slot_index, value);
   double_values_[frame_index].Add(value_desc);
 }
 
 
-static Mutex* flag_mutex = OS::CreateMutex();
-
-
 LargeObjectChunk* Deoptimizer::CreateCode(BailoutType type) {
   // We cannot run this if the serializer is enabled because this will
   // cause us to emit relocation information for the external
   // references. This is fine because the deoptimizer's code section
   // isn't meant to be serialized at all.
   ASSERT(!Serializer::enabled());
-  // Grab a mutex because we're changing a global flag.
-  ScopedLock lock(flag_mutex);
-  bool old_debug_code = FLAG_debug_code;
-  FLAG_debug_code = false;
 
   MacroAssembler masm(NULL, 16 * KB);
+  masm.set_emit_debug_code(false);
   GenerateDeoptimizationEntries(&masm, kNumberOfEntries, type);
   CodeDesc desc;
   masm.GetCode(&desc);
   ASSERT(desc.reloc_size == 0);
 
   LargeObjectChunk* chunk = LargeObjectChunk::New(desc.instr_size, EXECUTABLE);
   memcpy(chunk->GetStartAddress(), desc.buffer, desc.instr_size);
   CPU::FlushICache(chunk->GetStartAddress(), desc.instr_size);
-  FLAG_debug_code = old_debug_code;
   return chunk;
 }
 
 
 Code* Deoptimizer::FindDeoptimizingCodeFromAddress(Address addr) {
   DeoptimizingCodeListNode* node =
       Isolate::Current()->deoptimizer_data()->deoptimizing_code_list_;
   while (node != NULL) {
     if (node->code()->contains(addr)) return *node->code();
     node = node->next();
@@ skipping 232 matching lines @@
 }
 
 
 DeoptimizingCodeListNode::~DeoptimizingCodeListNode() {
   GlobalHandles* global_handles = Isolate::Current()->global_handles();
   global_handles->Destroy(reinterpret_cast<Object**>(code_.location()));
 }
 
 
 } }  // namespace v8::internal