Revision: 21270
Author:   [email protected]
Date:     Mon May 12 13:47:01 2014 UTC
Log:      Clean up debugger flags.

[email protected]

Review URL: https://codereview.chromium.org/261253005
http://code.google.com/p/v8/source/detail?r=21270

Modified:
 /branches/bleeding_edge/src/arm/full-codegen-arm.cc
 /branches/bleeding_edge/src/arm/lithium-codegen-arm.cc
 /branches/bleeding_edge/src/arm/macro-assembler-arm.cc
 /branches/bleeding_edge/src/arm/macro-assembler-arm.h
 /branches/bleeding_edge/src/arm64/full-codegen-arm64.cc
 /branches/bleeding_edge/src/arm64/lithium-codegen-arm64.cc
 /branches/bleeding_edge/src/arm64/macro-assembler-arm64.cc
 /branches/bleeding_edge/src/arm64/macro-assembler-arm64.h
 /branches/bleeding_edge/src/bootstrapper.cc
 /branches/bleeding_edge/src/codegen.cc
 /branches/bleeding_edge/src/compiler.cc
 /branches/bleeding_edge/src/compiler.h
 /branches/bleeding_edge/src/debug.cc
 /branches/bleeding_edge/src/debug.h
 /branches/bleeding_edge/src/execution.cc
 /branches/bleeding_edge/src/factory.cc
 /branches/bleeding_edge/src/factory.h
 /branches/bleeding_edge/src/flag-definitions.h
 /branches/bleeding_edge/src/frames.h
 /branches/bleeding_edge/src/full-codegen.cc
 /branches/bleeding_edge/src/ia32/full-codegen-ia32.cc
 /branches/bleeding_edge/src/ia32/lithium-codegen-ia32.cc
 /branches/bleeding_edge/src/ia32/macro-assembler-ia32.cc
 /branches/bleeding_edge/src/ia32/macro-assembler-ia32.h
 /branches/bleeding_edge/src/isolate-inl.h
 /branches/bleeding_edge/src/isolate.h
 /branches/bleeding_edge/src/mips/full-codegen-mips.cc
 /branches/bleeding_edge/src/mips/lithium-codegen-mips.cc
 /branches/bleeding_edge/src/mips/macro-assembler-mips.cc
 /branches/bleeding_edge/src/mips/macro-assembler-mips.h
 /branches/bleeding_edge/src/runtime.cc
 /branches/bleeding_edge/src/x64/full-codegen-x64.cc
 /branches/bleeding_edge/src/x64/lithium-codegen-x64.cc
 /branches/bleeding_edge/src/x64/macro-assembler-x64.cc
 /branches/bleeding_edge/src/x64/macro-assembler-x64.h
 /branches/bleeding_edge/test/cctest/test-heap.cc

=======================================
--- /branches/bleeding_edge/src/arm/full-codegen-arm.cc Mon May 12 07:49:11 2014 UTC +++ /branches/bleeding_edge/src/arm/full-codegen-arm.cc Mon May 12 13:47:01 2014 UTC
@@ -171,7 +171,8 @@
   FrameScope frame_scope(masm_, StackFrame::MANUAL);

   info->set_prologue_offset(masm_->pc_offset());
-  __ Prologue(BUILD_FUNCTION_FRAME);
+  ASSERT(!info->IsStub());
+  __ Prologue(info);
   info->AddNoFrameRange(0, masm_->pc_offset());

   { Comment cmnt(masm_, "[ Allocate locals");
@@ -349,7 +350,7 @@

 void FullCodeGenerator::EmitProfilingCounterReset() {
   int reset_value = FLAG_interrupt_budget;
-  if (isolate()->IsDebuggerActive()) {
+  if (info_->is_debug()) {
     // Detect debug break requests as soon as possible.
     reset_value = FLAG_interrupt_budget >> 4;
   }
=======================================
--- /branches/bleeding_edge/src/arm/lithium-codegen-arm.cc Fri May 9 08:28:25 2014 UTC +++ /branches/bleeding_edge/src/arm/lithium-codegen-arm.cc Mon May 12 13:47:01 2014 UTC
@@ -140,7 +140,7 @@

   info()->set_prologue_offset(masm_->pc_offset());
   if (NeedsEagerFrame()) {
- __ Prologue(info()->IsStub() ? BUILD_STUB_FRAME : BUILD_FUNCTION_FRAME);
+    __ Prologue(info());
     frame_is_built_ = true;
     info_->AddNoFrameRange(0, masm_->pc_offset());
   }
=======================================
--- /branches/bleeding_edge/src/arm/macro-assembler-arm.cc Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/arm/macro-assembler-arm.cc Mon May 12 13:47:01 2014 UTC
@@ -902,8 +902,8 @@
 }


-void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
-  if (frame_mode == BUILD_STUB_FRAME) {
+void MacroAssembler::Prologue(CompilationInfo* info) {
+  if (info->IsStub()) {
     PushFixedFrame();
     Push(Smi::FromInt(StackFrame::STUB));
     // Adjust FP to point to saved FP.
@@ -913,7 +913,7 @@
         this, kNoCodeAgeSequenceLength);
     // The following three instructions must remain together and unmodified
     // for code aging to work properly.
-    if (isolate()->IsCodePreAgingActive()) {
+    if (info->IsCodePreAgingActive()) {
       // Pre-age the code.
       Code* stub = Code::GetPreAgedCodeAgeStub(isolate());
       add(r0, pc, Operand(-8));
=======================================
--- /branches/bleeding_edge/src/arm/macro-assembler-arm.h Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/arm/macro-assembler-arm.h Mon May 12 13:47:01 2014 UTC
@@ -519,7 +519,7 @@
                          Label* not_int32);

   // Generates function and stub prologue code.
-  void Prologue(PrologueFrameMode frame_mode);
+  void Prologue(CompilationInfo* info);

   // Enter exit frame.
   // stack_space - extra stack space, used for alignment before call to C.
=======================================
--- /branches/bleeding_edge/src/arm64/full-codegen-arm64.cc Mon May 12 07:49:11 2014 UTC +++ /branches/bleeding_edge/src/arm64/full-codegen-arm64.cc Mon May 12 13:47:01 2014 UTC
@@ -170,7 +170,8 @@
   //  Push(lr, fp, cp, x1);
   //  Add(fp, jssp, 2 * kPointerSize);
   info->set_prologue_offset(masm_->pc_offset());
-  __ Prologue(BUILD_FUNCTION_FRAME);
+  ASSERT(!info->IsStub());
+  __ Prologue(info);
   info->AddNoFrameRange(0, masm_->pc_offset());

   // Reserve space on the stack for locals.
@@ -347,7 +348,7 @@

 void FullCodeGenerator::EmitProfilingCounterReset() {
   int reset_value = FLAG_interrupt_budget;
-  if (isolate()->IsDebuggerActive()) {
+  if (info_->is_debug()) {
     // Detect debug break requests as soon as possible.
     reset_value = FLAG_interrupt_budget >> 4;
   }
=======================================
--- /branches/bleeding_edge/src/arm64/lithium-codegen-arm64.cc Mon May 12 13:30:54 2014 UTC +++ /branches/bleeding_edge/src/arm64/lithium-codegen-arm64.cc Mon May 12 13:47:01 2014 UTC
@@ -671,7 +671,7 @@
   ASSERT(__ StackPointer().Is(jssp));
   info()->set_prologue_offset(masm_->pc_offset());
   if (NeedsEagerFrame()) {
- __ Prologue(info()->IsStub() ? BUILD_STUB_FRAME : BUILD_FUNCTION_FRAME);
+    __ Prologue(info());
     frame_is_built_ = true;
     info_->AddNoFrameRange(0, masm_->pc_offset());
   }
=======================================
--- /branches/bleeding_edge/src/arm64/macro-assembler-arm64.cc Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/arm64/macro-assembler-arm64.cc Mon May 12 13:47:01 2014 UTC
@@ -2982,8 +2982,8 @@
 }


-void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
-  if (frame_mode == BUILD_STUB_FRAME) {
+void MacroAssembler::Prologue(CompilationInfo* info) {
+  if (info->IsStub()) {
     ASSERT(StackPointer().Is(jssp));
     UseScratchRegisterScope temps(this);
     Register temp = temps.AcquireX();
@@ -2993,7 +2993,7 @@
     __ Push(lr, fp, cp, temp);
     __ Add(fp, jssp, StandardFrameConstants::kFixedFrameSizeFromFp);
   } else {
-    if (isolate()->IsCodePreAgingActive()) {
+    if (info->IsCodePreAgingActive()) {
       Code* stub = Code::GetPreAgedCodeAgeStub(isolate());
       __ EmitCodeAgeSequence(stub);
     } else {
=======================================
--- /branches/bleeding_edge/src/arm64/macro-assembler-arm64.h Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/arm64/macro-assembler-arm64.h Mon May 12 13:47:01 2014 UTC
@@ -1648,7 +1648,7 @@
   void ExitFrameRestoreFPRegs();

   // Generates function and stub prologue code.
-  void Prologue(PrologueFrameMode frame_mode);
+  void Prologue(CompilationInfo* info);

// Enter exit frame. Exit frames are used when calling C code from generated
   // (JavaScript) code.
=======================================
--- /branches/bleeding_edge/src/bootstrapper.cc Fri May  9 17:59:15 2014 UTC
+++ /branches/bleeding_edge/src/bootstrapper.cc Mon May 12 13:47:01 2014 UTC
@@ -1421,7 +1421,7 @@
                             Vector<const char> name,
                             Handle<String> source) {
   HandleScope scope(isolate);
-  isolate->debugger()->set_compiling_natives(true);
+  Debugger::IgnoreScope compiling_natives(isolate->debugger());
// During genesis, the boilerplate for stack overflow won't work until the
   // environment has been at least partially initialized. Add a stack check
   // before entering JS code to catch overflow early.
@@ -1437,7 +1437,6 @@
                                     true);
   ASSERT(isolate->has_pending_exception() != result);
   if (!result) isolate->clear_pending_exception();
-  isolate->debugger()->set_compiling_natives(false);
   return result;
 }

=======================================
--- /branches/bleeding_edge/src/codegen.cc      Tue May  6 11:14:37 2014 UTC
+++ /branches/bleeding_edge/src/codegen.cc      Mon May 12 13:47:01 2014 UTC
@@ -150,7 +150,8 @@
   Handle<Code> code =
       isolate->factory()->NewCode(desc, flags, masm->CodeObject(),
                                   false, is_crankshafted,
-                                  info->prologue_offset());
+                                  info->prologue_offset(),
+                                  info->is_debug());
   isolate->counters()->total_compiled_code_size()->Increment(
       code->instruction_size());
   isolate->heap()->IncrementCodeGeneratedBytes(is_crankshafted,
=======================================
--- /branches/bleeding_edge/src/compiler.cc     Wed Apr 30 10:51:01 2014 UTC
+++ /branches/bleeding_edge/src/compiler.cc     Mon May 12 13:47:01 2014 UTC
@@ -110,9 +110,9 @@
   }
   mode_ = mode;
   abort_due_to_dependency_ = false;
-  if (script_->type()->value() == Script::TYPE_NATIVE) {
-    MarkAsNative();
-  }
+  if (script_->type()->value() == Script::TYPE_NATIVE) MarkAsNative();
+  if (isolate_->debugger()->is_active()) MarkAsDebug();
+
   if (!shared_info_.is_null()) {
     ASSERT(strict_mode() == SLOPPY);
     SetStrictMode(shared_info_->strict_mode());
@@ -277,21 +277,6 @@
   DECLARATION_NODE_LIST(DEF_VISIT)
 #undef DEF_VISIT
 };
-
-
-// Determine whether to use the full compiler for all code. If the flag
-// --always-full-compiler is specified this is the case. For the virtual frame -// based compiler the full compiler is also used if a debugger is connected, as -// the code from the full compiler supports mode precise break points. For the -// crankshaft adaptive compiler debugging the optimized code is not possible at -// all. However crankshaft support recompilation of functions, so in this case -// the full compiler need not be be used if a debugger is attached, but only if
-// break points has actually been set.
-static bool IsDebuggerActive(Isolate* isolate) {
-  return isolate->use_crankshaft() ?
-    isolate->debug()->has_break_points() :
-    isolate->debugger()->IsDebuggerActive();
-}


 OptimizedCompileJob::Status OptimizedCompileJob::CreateGraph() {
@@ -311,7 +296,9 @@
   // to use the Hydrogen-based optimizing compiler. We already have
   // generated code for this from the shared function object.
   if (FLAG_always_full_compiler) return AbortOptimization();
- if (IsDebuggerActive(isolate())) return AbortOptimization(kDebuggerIsActive);
+
+  // Do not use crankshaft if compiling for debugging.
+  if (info()->is_debug()) return AbortOptimization(kDebuggerIsActive);

   // Limit the number of times we re-compile a functions with
   // the optimizing compiler.
@@ -711,6 +698,8 @@
   Isolate* isolate = info.isolate();
   VMState<COMPILER> state(isolate);

+  info.MarkAsDebug();
+
   ASSERT(!isolate->has_pending_exception());
   Handle<Code> old_code(function->shared()->code());
   ASSERT(old_code->kind() == Code::FUNCTION);
=======================================
--- /branches/bleeding_edge/src/compiler.h      Mon May 12 07:49:11 2014 UTC
+++ /branches/bleeding_edge/src/compiler.h      Mon May 12 13:47:01 2014 UTC
@@ -50,7 +50,6 @@
   bool is_eval() const { return IsEval::decode(flags_); }
   bool is_global() const { return IsGlobal::decode(flags_); }
StrictMode strict_mode() const { return StrictModeField::decode(flags_); }
-  bool is_in_loop() const { return IsInLoop::decode(flags_); }
   FunctionLiteral* function() const { return function_; }
   Scope* scope() const { return scope_; }
   Scope* global_scope() const { return global_scope_; }
@@ -95,10 +94,6 @@
ASSERT(this->strict_mode() == SLOPPY || this->strict_mode() == strict_mode);
     flags_ = StrictModeField::update(flags_, strict_mode);
   }
-  void MarkAsInLoop() {
-    ASSERT(is_lazy());
-    flags_ |= IsInLoop::encode(true);
-  }
   void MarkAsNative() {
     flags_ |= IsNative::encode(true);
   }
@@ -150,6 +145,18 @@
   bool GetMustNotHaveEagerFrame() const {
     return MustNotHaveEagerFrame::decode(flags_);
   }
+
+  void MarkAsDebug() {
+    flags_ |= IsDebug::encode(true);
+  }
+
+  bool is_debug() const {
+    return IsDebug::decode(flags_);
+  }
+
+  bool IsCodePreAgingActive() const {
+    return FLAG_optimize_for_size && FLAG_age_code && !is_debug();
+  }

   void SetParseRestriction(ParseRestriction restriction) {
     flags_ = ParseRestricitonField::update(flags_, restriction);
@@ -353,8 +360,8 @@
   // Flags that can be set for eager compilation.
   class IsEval:   public BitField<bool, 1, 1> {};
   class IsGlobal: public BitField<bool, 2, 1> {};
-  // Flags that can be set for lazy compilation.
-  class IsInLoop: public BitField<bool, 3, 1> {};
+  // If the function is being compiled for the debugger.
+  class IsDebug: public BitField<bool, 3, 1> {};
   // Strict mode - used in eager compilation.
   class StrictModeField: public BitField<StrictMode, 4, 1> {};
   // Is this a function from our natives.
=======================================
--- /branches/bleeding_edge/src/debug.cc        Fri May  9 09:24:32 2014 UTC
+++ /branches/bleeding_edge/src/debug.cc        Mon May 12 13:47:01 2014 UTC
@@ -766,11 +766,9 @@

   // Bail out if we're already in the process of compiling the native
   // JavaScript source code for the debugger.
-  if (debugger->compiling_natives() ||
-      debugger->is_loading_debugger())
-    return false;
-  debugger->set_loading_debugger(true);
+  if (debugger->ignore_debugger()) return false;

+  Debugger::IgnoreScope during_load(debugger);
   // Disable breakpoints and interrupts while compiling and running the
   // debugger scripts including the context creation code.
   DisableBreak disable(isolate_, true);
@@ -806,7 +804,6 @@
       false);

   // Compile the JavaScript for the debugger in the debugger context.
-  debugger->set_compiling_natives(true);
   bool caught_exception =
       !CompileDebuggerScript(isolate_, Natives::GetIndex("mirror")) ||
       !CompileDebuggerScript(isolate_, Natives::GetIndex("debug"));
@@ -815,12 +812,9 @@
     caught_exception = caught_exception ||
         !CompileDebuggerScript(isolate_, Natives::GetIndex("liveedit"));
   }
-
-  debugger->set_compiling_natives(false);

   // Make sure we mark the debugger as not loading before we might
   // return.
-  debugger->set_loading_debugger(false);

   // Check for caught exceptions.
   if (caught_exception) return false;
@@ -1998,37 +1992,15 @@
 };


-class ForceDebuggerActive {
- public:
-  explicit ForceDebuggerActive(Isolate *isolate) {
-    isolate_ = isolate;
-    old_state_ = isolate->debugger()->force_debugger_active();
-    isolate_->debugger()->set_force_debugger_active(true);
-  }
-
-  ~ForceDebuggerActive() {
-    isolate_->debugger()->set_force_debugger_active(old_state_);
-  }
-
- private:
-  Isolate *isolate_;
-  bool old_state_;
-
-  DISALLOW_COPY_AND_ASSIGN(ForceDebuggerActive);
-};
-
-
 void Debug::EnsureFunctionHasDebugBreakSlots(Handle<JSFunction> function) {
   if (function->code()->kind() == Code::FUNCTION &&
       function->code()->has_debug_break_slots()) {
     // Nothing to do. Function code already had debug break slots.
     return;
   }
-
   // Make sure that the shared full code is compiled with debug
   // break slots.
   if (!function->shared()->code()->has_debug_break_slots()) {
-    ForceDebuggerActive force_debugger_active(isolate_);
     MaybeHandle<Code> code = Compiler::GetCodeForDebugging(function);
     // Recompilation can fail.  In that case leave the code as it was.
     if (!code.is_null()) function->ReplaceCode(*code.ToHandleChecked());
@@ -2652,14 +2624,12 @@


 Debugger::Debugger(Isolate* isolate)
-    : debugger_access_(isolate->debugger_access()),
-      event_listener_(Handle<Object>()),
+    : event_listener_(Handle<Object>()),
       event_listener_data_(Handle<Object>()),
-      compiling_natives_(false),
-      is_loading_debugger_(false),
+      is_active_(false),
+      ignore_debugger_(false),
       live_edit_enabled_(true),
       never_unload_debugger_(false),
-      force_debugger_active_(false),
       message_handler_(NULL),
       debugger_unload_pending_(false),
       debug_message_dispatch_handler_(NULL),
@@ -2760,7 +2730,7 @@

   // Bail out based on state or if there is no listener for this event
   if (debug->InDebugger()) return;
-  if (!Debugger::EventActive(v8::Exception)) return;
+  if (!Debugger::EventActive()) return;

   Handle<Object> promise = debug->GetPromiseForUncaughtException();
   uncaught |= !promise->IsUndefined();
@@ -2804,7 +2774,7 @@
   ASSERT(isolate_->context() == *isolate_->debug()->debug_context());

   // Bail out if there is no listener for this event
-  if (!Debugger::EventActive(v8::Break)) return;
+  if (!Debugger::EventActive()) return;

   // Debugger must be entered in advance.
   ASSERT(isolate_->context() == *isolate_->debug()->debug_context());
@@ -2826,8 +2796,7 @@

   // Bail out based on state or if there is no listener for this event
   if (isolate_->debug()->InDebugger()) return;
-  if (compiling_natives()) return;
-  if (!EventActive(v8::BeforeCompile)) return;
+  if (!EventActive()) return;

   // Enter the debugger.
   EnterDebugger debugger(isolate_);
@@ -2855,10 +2824,7 @@
   debug->AddScriptToScriptCache(script);

   // No more to do if not debugging.
-  if (!IsDebuggerActive()) return;
-
-  // No compile events while compiling natives.
-  if (compiling_natives()) return;
+  if (!Debugger::EventActive()) return;

   // Store whether in debugger before entering debugger.
   bool in_debugger = debug->InDebugger();
@@ -2897,7 +2863,6 @@
   }
   // Bail out based on state or if there is no listener for this event
if (in_debugger && (after_compile_flags & SEND_WHEN_DEBUGGING) == 0) return;
-  if (!Debugger::EventActive(v8::AfterCompile)) return;

   // Create the compile state object.
   Handle<Object> event_data;
@@ -2914,8 +2879,7 @@

   // No more to do if not debugging.
   if (isolate_->debug()->InDebugger()) return;
-  if (!IsDebuggerActive()) return;
-  if (!Debugger::EventActive(v8::ScriptCollected)) return;
+  if (!Debugger::EventActive()) return;

   // Enter the debugger.
   EnterDebugger debugger(isolate_);
@@ -3129,7 +3093,7 @@
     CommandMessage command = command_queue_.Get();
     isolate_->logger()->DebugTag(
         "Got request from command queue, in interactive loop.");
-    if (!Debugger::IsDebuggerActive()) {
+    if (!Debugger::is_active()) {
       // Delete command text and user data.
       command.Dispose();
       return;
@@ -3217,7 +3181,7 @@


 void Debugger::SetMessageHandler(v8::Debug::MessageHandler2 handler) {
-  LockGuard<RecursiveMutex> with(debugger_access_);
+  LockGuard<RecursiveMutex> with(&debugger_access_);

   message_handler_ = handler;
   ListenersChanged();
@@ -3232,8 +3196,9 @@


 void Debugger::ListenersChanged() {
-  bool active = IsDebuggerActive();
-  if (active) {
+  LockGuard<RecursiveMutex> with(&debugger_access_);
+  is_active_ = message_handler_ != NULL || !event_listener_.is_null();
+  if (is_active_) {
     // Disable the compilation cache when the debugger is active.
     isolate_->compilation_cache()->Disable();
     debugger_unload_pending_ = false;
@@ -3261,7 +3226,7 @@
 // Calls the registered debug message handler. This callback is part of the
 // public API.
 void Debugger::InvokeMessageHandler(MessageImpl message) {
-  LockGuard<RecursiveMutex> with(debugger_access_);
+  LockGuard<RecursiveMutex> with(&debugger_access_);

   if (message_handler_ != NULL) {
     message_handler_(message);
@@ -3317,15 +3282,6 @@
     isolate_->stack_guard()->RequestDebugCommand();
   }
 }
-
-
-bool Debugger::IsDebuggerActive() {
-  LockGuard<RecursiveMutex> with(debugger_access_);
-
-  return message_handler_ != NULL ||
-      !event_listener_.is_null() ||
-      force_debugger_active_;
-}


 MaybeHandle<Object> Debugger::Call(Handle<JSFunction> fun,
@@ -3478,7 +3434,7 @@
     }

// If leaving the debugger with the debugger no longer active unload it.
-    if (!isolate_->debugger()->IsDebuggerActive()) {
+    if (!isolate_->debugger()->is_active()) {
       isolate_->debugger()->UnloadDebugger();
     }
   }
=======================================
--- /branches/bleeding_edge/src/debug.h Fri May  9 09:24:32 2014 UTC
+++ /branches/bleeding_edge/src/debug.h Mon May 12 13:47:01 2014 UTC
@@ -822,45 +822,49 @@
   void UnloadDebugger();
   friend void ForceUnloadDebugger();  // In test-debug.cc

-  inline bool EventActive(v8::DebugEvent event) {
-    LockGuard<RecursiveMutex> lock_guard(debugger_access_);
+  inline bool EventActive() {
+    LockGuard<RecursiveMutex> lock_guard(&debugger_access_);

     // Check whether the message handler was been cleared.
+ // TODO(yangguo): handle loading and unloading of the debugger differently.
     if (debugger_unload_pending_) {
       if (isolate_->debug()->debugger_entry() == NULL) {
         UnloadDebugger();
       }
     }
-
-    if (((event == v8::BeforeCompile) || (event == v8::AfterCompile)) &&
-        !FLAG_debug_compile_events) {
-      return false;
-
-    } else if ((event == v8::ScriptCollected) &&
-               !FLAG_debug_script_collected_events) {
-      return false;
-    }

     // Currently argument event is not used.
-    return !compiling_natives_ && Debugger::IsDebuggerActive();
+    return !ignore_debugger_ && is_active_;
   }

-  void set_compiling_natives(bool compiling_natives) {
-    compiling_natives_ = compiling_natives;
-  }
-  bool compiling_natives() const { return compiling_natives_; }
-  void set_loading_debugger(bool v) { is_loading_debugger_ = v; }
-  bool is_loading_debugger() const { return is_loading_debugger_; }
+  bool ignore_debugger() const { return ignore_debugger_; }
   void set_live_edit_enabled(bool v) { live_edit_enabled_ = v; }
   bool live_edit_enabled() const {
     return FLAG_enable_liveedit && live_edit_enabled_ ;
   }
-  void set_force_debugger_active(bool force_debugger_active) {
-    force_debugger_active_ = force_debugger_active;
+
+  bool is_active() {
+    LockGuard<RecursiveMutex> lock_guard(&debugger_access_);
+    return is_active_;
   }
-  bool force_debugger_active() const { return force_debugger_active_; }
+
+  class IgnoreScope {
+   public:
+    explicit IgnoreScope(Debugger* debugger)
+        : debugger_(debugger),
+          old_state_(debugger_->ignore_debugger_) {
+      debugger_->ignore_debugger_ = true;
+    }
+
+    ~IgnoreScope() {
+      debugger_->ignore_debugger_ = old_state_;
+    }

-  bool IsDebuggerActive();
+   private:
+    Debugger* debugger_;
+    bool old_state_;
+    DISALLOW_COPY_AND_ASSIGN(IgnoreScope);
+  };

  private:
   explicit Debugger(Isolate* isolate);
@@ -878,14 +882,13 @@
                            Handle<Object> event_data);
   void ListenersChanged();

-  RecursiveMutex* debugger_access_;  // Mutex guarding debugger variables.
+  RecursiveMutex debugger_access_;  // Mutex guarding debugger variables.
   Handle<Object> event_listener_;  // Global handle to listener.
   Handle<Object> event_listener_data_;
-  bool compiling_natives_;  // Are we compiling natives?
-  bool is_loading_debugger_;  // Are we loading the debugger?
+  bool is_active_;
+  bool ignore_debugger_;  // Are we temporarily ignoring the debugger?
   bool live_edit_enabled_;  // Enable LiveEdit.
   bool never_unload_debugger_;  // Can we unload the debugger?
- bool force_debugger_active_; // Activate debugger without event listeners.
   v8::Debug::MessageHandler2 message_handler_;
   bool debugger_unload_pending_;  // Was message handler cleared?

=======================================
--- /branches/bleeding_edge/src/execution.cc    Mon May 12 11:52:44 2014 UTC
+++ /branches/bleeding_edge/src/execution.cc    Mon May 12 13:47:01 2014 UTC
@@ -104,7 +104,7 @@
   if (has_exception) {
     isolate->ReportPendingMessages();
     // Reset stepping state when script exits with uncaught exception.
-    if (isolate->debugger()->IsDebuggerActive()) {
+    if (isolate->debugger()->is_active()) {
       isolate->debug()->ClearStepping();
     }
     return MaybeHandle<Object>();
@@ -685,7 +685,7 @@
   if (isolate->bootstrapper()->IsActive()) return;

   // Ignore debug break if debugger is not active.
-  if (!isolate->debugger()->IsDebuggerActive()) return;
+  if (!isolate->debugger()->is_active()) return;

   StackLimitCheck check(isolate);
   if (check.HasOverflowed()) return;
=======================================
--- /branches/bleeding_edge/src/factory.cc      Fri May  9 17:59:15 2014 UTC
+++ /branches/bleeding_edge/src/factory.cc      Mon May 12 13:47:01 2014 UTC
@@ -1395,7 +1395,8 @@
                               Handle<Object> self_ref,
                               bool immovable,
                               bool crankshafted,
-                              int prologue_offset) {
+                              int prologue_offset,
+                              bool is_debug) {
   Handle<ByteArray> reloc_info = NewByteArray(desc.reloc_size, TENURED);
   Handle<ConstantPoolArray> constant_pool =
       desc.origin->NewConstantPool(isolate());
@@ -1427,14 +1428,15 @@
   if (code->kind() == Code::OPTIMIZED_FUNCTION) {
     code->set_marked_for_deoptimization(false);
   }
+
+  if (is_debug) {
+    ASSERT(code->kind() == Code::FUNCTION);
+    code->set_has_debug_break_slots(true);
+  }

   desc.origin->PopulateConstantPool(*constant_pool);
   code->set_constant_pool(*constant_pool);

-  if (code->kind() == Code::FUNCTION) {
- code->set_has_debug_break_slots(isolate()->debugger()->IsDebuggerActive());
-  }
-
   // Allow self references to created code object by patching the handle to
   // point to the newly allocated Code object.
   if (!self_ref.is_null()) *(self_ref.location()) = *code;
=======================================
--- /branches/bleeding_edge/src/factory.h       Fri May  9 17:59:15 2014 UTC
+++ /branches/bleeding_edge/src/factory.h       Mon May 12 13:47:01 2014 UTC
@@ -489,7 +489,8 @@
                        Handle<Object> self_reference,
                        bool immovable = false,
                        bool crankshafted = false,
-                       int prologue_offset = Code::kPrologueOffsetNotSet);
+                       int prologue_offset = Code::kPrologueOffsetNotSet,
+                       bool is_debug = false);

   Handle<Code> CopyCode(Handle<Code> code);

=======================================
--- /branches/bleeding_edge/src/flag-definitions.h Mon May 12 09:25:32 2014 UTC +++ /branches/bleeding_edge/src/flag-definitions.h Mon May 12 13:47:01 2014 UTC
@@ -671,17 +671,6 @@
 DEFINE_args(js_arguments,
"Pass all remaining arguments to the script. Alias for \"--\".")

-#if defined(WEBOS__)
-DEFINE_bool(debug_compile_events, false, "Enable debugger compile events")
-DEFINE_bool(debug_script_collected_events, false,
-            "Enable debugger script collected events")
-#else
-DEFINE_bool(debug_compile_events, true, "Enable debugger compile events")
-DEFINE_bool(debug_script_collected_events, true,
-            "Enable debugger script collected events")
-#endif
-
-
 //
 // GDB JIT integration flags.
 //
=======================================
--- /branches/bleeding_edge/src/frames.h        Tue Apr 29 06:42:26 2014 UTC
+++ /branches/bleeding_edge/src/frames.h        Mon May 12 13:47:01 2014 UTC
@@ -930,13 +930,6 @@
 };


-// Used specify the type of prologue to generate.
-enum PrologueFrameMode {
-  BUILD_FUNCTION_FRAME,
-  BUILD_STUB_FRAME
-};
-
-
 // Reads all frames on the current stack and copies them into the current
 // zone memory.
 Vector<StackFrame*> CreateStackMap(Isolate* isolate, Zone* zone);
=======================================
--- /branches/bleeding_edge/src/full-codegen.cc Wed Apr 30 12:33:16 2014 UTC
+++ /branches/bleeding_edge/src/full-codegen.cc Mon May 12 13:47:01 2014 UTC
@@ -805,7 +805,7 @@


 void FullCodeGenerator::SetStatementPosition(Statement* stmt) {
-  if (!isolate()->debugger()->IsDebuggerActive()) {
+  if (!info_->is_debug()) {
     CodeGenerator::RecordPositions(masm_, stmt->position());
   } else {
// Check if the statement will be breakable without adding a debug break
@@ -827,7 +827,7 @@


 void FullCodeGenerator::SetExpressionPosition(Expression* expr) {
-  if (!isolate()->debugger()->IsDebuggerActive()) {
+  if (!info_->is_debug()) {
     CodeGenerator::RecordPositions(masm_, expr->position());
   } else {
// Check if the expression will be breakable without adding a debug break
=======================================
--- /branches/bleeding_edge/src/ia32/full-codegen-ia32.cc Mon May 12 07:49:11 2014 UTC +++ /branches/bleeding_edge/src/ia32/full-codegen-ia32.cc Mon May 12 13:47:01 2014 UTC
@@ -157,7 +157,8 @@
   FrameScope frame_scope(masm_, StackFrame::MANUAL);

   info->set_prologue_offset(masm_->pc_offset());
-  __ Prologue(BUILD_FUNCTION_FRAME);
+  ASSERT(!info->IsStub());
+  __ Prologue(info);
   info->AddNoFrameRange(0, masm_->pc_offset());

   { Comment cmnt(masm_, "[ Allocate locals");
=======================================
--- /branches/bleeding_edge/src/ia32/lithium-codegen-ia32.cc Fri May 9 13:01:50 2014 UTC +++ /branches/bleeding_edge/src/ia32/lithium-codegen-ia32.cc Mon May 12 13:47:01 2014 UTC
@@ -188,7 +188,7 @@
   if (NeedsEagerFrame()) {
     ASSERT(!frame_is_built_);
     frame_is_built_ = true;
- __ Prologue(info()->IsStub() ? BUILD_STUB_FRAME : BUILD_FUNCTION_FRAME);
+    __ Prologue(info());
     info()->AddNoFrameRange(0, masm_->pc_offset());
   }

=======================================
--- /branches/bleeding_edge/src/ia32/macro-assembler-ia32.cc Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/ia32/macro-assembler-ia32.cc Mon May 12 13:47:01 2014 UTC
@@ -908,8 +908,8 @@
 }


-void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
-  if (frame_mode == BUILD_STUB_FRAME) {
+void MacroAssembler::Prologue(CompilationInfo* info) {
+  if (info->IsStub()) {
     push(ebp);  // Caller's frame pointer.
     mov(ebp, esp);
     push(esi);  // Callee's context.
@@ -917,7 +917,7 @@
   } else {
     PredictableCodeSizeScope predictible_code_size_scope(this,
         kNoCodeAgeSequenceLength);
-    if (isolate()->IsCodePreAgingActive()) {
+    if (info->IsCodePreAgingActive()) {
         // Pre-age the code.
       call(isolate()->builtins()->MarkCodeAsExecutedOnce(),
           RelocInfo::CODE_AGE_SEQUENCE);
=======================================
--- /branches/bleeding_edge/src/ia32/macro-assembler-ia32.h Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/ia32/macro-assembler-ia32.h Mon May 12 13:47:01 2014 UTC
@@ -204,7 +204,7 @@
   void DebugBreak();

   // Generates function and stub prologue code.
-  void Prologue(PrologueFrameMode frame_mode);
+  void Prologue(CompilationInfo* info);

   // Enter specific kind of exit frame. Expects the number of
   // arguments in register eax and sets up the number of arguments in
=======================================
--- /branches/bleeding_edge/src/isolate-inl.h   Mon May  5 07:10:38 2014 UTC
+++ /branches/bleeding_edge/src/isolate-inl.h   Mon May 12 13:47:01 2014 UTC
@@ -23,16 +23,6 @@

   c_entry_fp_ = isolate->c_entry_fp(isolate->thread_local_top());
 }
-
-
-bool Isolate::IsCodePreAgingActive() {
-  return FLAG_optimize_for_size && FLAG_age_code && !IsDebuggerActive();
-}
-
-
-bool Isolate::IsDebuggerActive() {
-  return debugger()->IsDebuggerActive();
-}


 bool Isolate::DebuggerHasBreakPoints() {
=======================================
--- /branches/bleeding_edge/src/isolate.h       Fri May  9 09:13:12 2014 UTC
+++ /branches/bleeding_edge/src/isolate.h       Mon May 12 13:47:01 2014 UTC
@@ -511,9 +511,6 @@

   // Mutex for serializing access to break control structures.
   RecursiveMutex* break_access() { return &break_access_; }
-
-  // Mutex for serializing access to debugger.
-  RecursiveMutex* debugger_access() { return &debugger_access_; }

   Address get_address_from_id(AddressId id);

@@ -929,13 +926,10 @@
       interp_canonicalize_mapping() {
     return &interp_canonicalize_mapping_;
   }
-
-  inline bool IsCodePreAgingActive();

   Debugger* debugger() {  return debugger_; }
   Debug* debug() { return debug_; }

-  inline bool IsDebuggerActive();
   inline bool DebuggerHasBreakPoints();

   CpuProfiler* cpu_profiler() const { return cpu_profiler_; }
@@ -1194,7 +1188,6 @@
   CodeRange* code_range_;
   RecursiveMutex break_access_;
   Atomic32 debugger_initialized_;
-  RecursiveMutex debugger_access_;
   Logger* logger_;
   StackGuard stack_guard_;
   StatsTable* stats_table_;
=======================================
--- /branches/bleeding_edge/src/mips/full-codegen-mips.cc Mon May 12 07:49:11 2014 UTC +++ /branches/bleeding_edge/src/mips/full-codegen-mips.cc Mon May 12 13:47:01 2014 UTC
@@ -176,7 +176,8 @@
   FrameScope frame_scope(masm_, StackFrame::MANUAL);

   info->set_prologue_offset(masm_->pc_offset());
-  __ Prologue(BUILD_FUNCTION_FRAME);
+  ASSERT(!info->IsStub());
+  __ Prologue(info);
   info->AddNoFrameRange(0, masm_->pc_offset());

   { Comment cmnt(masm_, "[ Allocate locals");
@@ -353,7 +354,7 @@

 void FullCodeGenerator::EmitProfilingCounterReset() {
   int reset_value = FLAG_interrupt_budget;
-  if (isolate()->IsDebuggerActive()) {
+  if (info_->is_debug()) {
     // Detect debug break requests as soon as possible.
     reset_value = FLAG_interrupt_budget >> 4;
   }
=======================================
--- /branches/bleeding_edge/src/mips/lithium-codegen-mips.cc Fri May 9 15:49:42 2014 UTC +++ /branches/bleeding_edge/src/mips/lithium-codegen-mips.cc Mon May 12 13:47:01 2014 UTC
@@ -162,7 +162,7 @@

   info()->set_prologue_offset(masm_->pc_offset());
   if (NeedsEagerFrame()) {
- __ Prologue(info()->IsStub() ? BUILD_STUB_FRAME : BUILD_FUNCTION_FRAME);
+    __ Prologue(info());
     frame_is_built_ = true;
     info_->AddNoFrameRange(0, masm_->pc_offset());
   }
=======================================
--- /branches/bleeding_edge/src/mips/macro-assembler-mips.cc Fri May 9 17:39:04 2014 UTC +++ /branches/bleeding_edge/src/mips/macro-assembler-mips.cc Mon May 12 13:47:01 2014 UTC
@@ -4452,8 +4452,8 @@
 }


-void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
-  if (frame_mode == BUILD_STUB_FRAME) {
+void MacroAssembler::Prologue(CompilationInfo* info) {
+  if (info->IsStub()) {
     Push(ra, fp, cp);
     Push(Smi::FromInt(StackFrame::STUB));
     // Adjust FP to point to saved FP.
@@ -4463,7 +4463,7 @@
       this, kNoCodeAgeSequenceLength);
     // The following three instructions must remain together and unmodified
     // for code aging to work properly.
-    if (isolate()->IsCodePreAgingActive()) {
+    if (info->IsCodePreAgingActive()) {
       // Pre-age the code.
       Code* stub = Code::GetPreAgedCodeAgeStub(isolate());
       nop(Assembler::CODE_AGE_MARKER_NOP);
=======================================
--- /branches/bleeding_edge/src/mips/macro-assembler-mips.h Fri May 9 17:39:04 2014 UTC +++ /branches/bleeding_edge/src/mips/macro-assembler-mips.h Mon May 12 13:47:01 2014 UTC
@@ -1492,7 +1492,7 @@
   }

   // Generates function and stub prologue code.
-  void Prologue(PrologueFrameMode frame_mode);
+  void Prologue(CompilationInfo* info);

   // Activation support.
   void EnterFrame(StackFrame::Type type);
=======================================
--- /branches/bleeding_edge/src/runtime.cc      Mon May 12 12:05:00 2014 UTC
+++ /branches/bleeding_edge/src/runtime.cc      Mon May 12 13:47:01 2014 UTC
@@ -5609,7 +5609,7 @@
 // to a built-in function such as Array.forEach.
 RUNTIME_FUNCTION(Runtime_DebugCallbackSupportsStepping) {
   ASSERT(args.length() == 1);
-  if (!isolate->IsDebuggerActive() || !isolate->debug()->StepInActive()) {
+ if (!isolate->debugger()->is_active() | | !isolate->debug()->StepInActive()) {
     return isolate->heap()->false_value();
   }
   CONVERT_ARG_CHECKED(Object, callback, 0);
=======================================
--- /branches/bleeding_edge/src/x64/full-codegen-x64.cc Mon May 12 07:49:11 2014 UTC +++ /branches/bleeding_edge/src/x64/full-codegen-x64.cc Mon May 12 13:47:01 2014 UTC
@@ -157,7 +157,8 @@
   FrameScope frame_scope(masm_, StackFrame::MANUAL);

   info->set_prologue_offset(masm_->pc_offset());
-  __ Prologue(BUILD_FUNCTION_FRAME);
+  ASSERT(!info->IsStub());
+  __ Prologue(info);
   info->AddNoFrameRange(0, masm_->pc_offset());

   { Comment cmnt(masm_, "[ Allocate locals");
=======================================
--- /branches/bleeding_edge/src/x64/lithium-codegen-x64.cc Fri May 9 08:28:25 2014 UTC +++ /branches/bleeding_edge/src/x64/lithium-codegen-x64.cc Mon May 12 13:47:01 2014 UTC
@@ -149,7 +149,7 @@
   if (NeedsEagerFrame()) {
     ASSERT(!frame_is_built_);
     frame_is_built_ = true;
- __ Prologue(info()->IsStub() ? BUILD_STUB_FRAME : BUILD_FUNCTION_FRAME);
+    __ Prologue(info());
     info()->AddNoFrameRange(0, masm_->pc_offset());
   }

=======================================
--- /branches/bleeding_edge/src/x64/macro-assembler-x64.cc Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/x64/macro-assembler-x64.cc Mon May 12 13:47:01 2014 UTC
@@ -3889,8 +3889,8 @@
 }


-void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
-  if (frame_mode == BUILD_STUB_FRAME) {
+void MacroAssembler::Prologue(CompilationInfo* info) {
+  if (info->IsStub()) {
     pushq(rbp);  // Caller's frame pointer.
     movp(rbp, rsp);
     Push(rsi);  // Callee's context.
@@ -3898,7 +3898,7 @@
   } else {
     PredictableCodeSizeScope predictible_code_size_scope(this,
         kNoCodeAgeSequenceLength);
-    if (isolate()->IsCodePreAgingActive()) {
+    if (info->IsCodePreAgingActive()) {
         // Pre-age the code.
       Call(isolate()->builtins()->MarkCodeAsExecutedOnce(),
            RelocInfo::CODE_AGE_SEQUENCE);
=======================================
--- /branches/bleeding_edge/src/x64/macro-assembler-x64.h Fri May 9 16:18:58 2014 UTC +++ /branches/bleeding_edge/src/x64/macro-assembler-x64.h Mon May 12 13:47:01 2014 UTC
@@ -274,7 +274,7 @@
   void DebugBreak();

   // Generates function and stub prologue code.
-  void Prologue(PrologueFrameMode frame_mode);
+  void Prologue(CompilationInfo* info);

   // Enter specific kind of exit frame; either in normal or
   // debug mode. Expects the number of arguments in register rax and
=======================================
--- /branches/bleeding_edge/test/cctest/test-heap.cc Fri May 9 16:39:33 2014 UTC +++ /branches/bleeding_edge/test/cctest/test-heap.cc Mon May 12 13:47:01 2014 UTC
@@ -3947,7 +3947,8 @@
   i::byte buffer[i::Assembler::kMinimalBufferSize];
   MacroAssembler masm(isolate, buffer, sizeof(buffer));
   CodeDesc desc;
-  masm.Prologue(BUILD_FUNCTION_FRAME);
+  masm.Push(isolate->factory()->undefined_value());
+  masm.Drop(1);
   masm.GetCode(&desc);
   Handle<Object> undefined(isolate->heap()->undefined_value(), isolate);
   Handle<Code> code = isolate->factory()->NewCode(

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