Remove unused thread locals from debugger.

src/debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
 #include "api.h"
 #include "arguments.h"
 #include "bootstrapper.h"
 #include "code-stubs.h"
@@ skipping 22 matching lines @@
 Debug::Debug(Isolate* isolate)
     : has_break_points_(false),
       script_cache_(NULL),
       debug_info_list_(NULL),
       disable_break_(false),
       break_on_exception_(false),
       break_on_uncaught_exception_(false),
       promise_catch_handlers_(0),
       promise_getters_(0),
       isolate_(isolate) {
-  memset(registers_, 0, sizeof(JSCallerSavedBuffer));
   ThreadInit();
 }
 
 
 static v8::Handle<v8::Context> GetDebugEventContext(Isolate* isolate) {
   Handle<Context> context = isolate->debug()->debugger_entry()->GetContext();
   // Isolate::context() may have been NULL when "script collected" event
   // occured.
   if (context.is_null()) return v8::Local<v8::Context>();
   Handle<Context> native_context(context->native_context());
@@ skipping 457 matching lines @@
   // TODO(isolates): frames_are_dropped_?
   thread_local_.debugger_entry_ = NULL;
   thread_local_.has_pending_interrupt_ = false;
   thread_local_.restarter_frame_function_pointer_ = NULL;
 }
 
 
 char* Debug::ArchiveDebug(char* storage) {
   char* to = storage;
   OS::MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
-  to += sizeof(ThreadLocal);
-  OS::MemCopy(to, reinterpret_cast<char*>(&registers_), sizeof(registers_));
   ThreadInit();
-  ASSERT(to <= storage + ArchiveSpacePerThread());
   return storage + ArchiveSpacePerThread();
 }
 
 
 char* Debug::RestoreDebug(char* storage) {
   char* from = storage;
   OS::MemCopy(
       reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
-  from += sizeof(ThreadLocal);
-  OS::MemCopy(reinterpret_cast<char*>(&registers_), from, sizeof(registers_));
-  ASSERT(from <= storage + ArchiveSpacePerThread());
   return storage + ArchiveSpacePerThread();
 }
 
 
 int Debug::ArchiveSpacePerThread() {
-  return sizeof(ThreadLocal) + sizeof(JSCallerSavedBuffer);
+  return sizeof(ThreadLocal);
 }
 
 
 // Frame structure (conforms InternalFrame structure):
 //   -- code
 //   -- SMI maker
 //   -- function (slot is called "context")
 //   -- frame base
 Object** Debug::SetUpFrameDropperFrame(StackFrame* bottom_js_frame,
                                        Handle<Code> code) {
@@ skipping 2999 matching lines @@
   logger_->DebugEvent("Put", message.text());
 }
 
 
 void LockingCommandMessageQueue::Clear() {
   LockGuard<Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 } }  // namespace v8::internal