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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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411 bool* caught_exception); | 411 bool* caught_exception); |
412 static Handle<Object> MakeExceptionEvent(Handle<Object> exec_state, | 412 static Handle<Object> MakeExceptionEvent(Handle<Object> exec_state, |
413 Handle<Object> exception, | 413 Handle<Object> exception, |
414 bool uncaught, | 414 bool uncaught, |
415 bool* caught_exception); | 415 bool* caught_exception); |
416 static Handle<Object> MakeNewFunctionEvent(Handle<Object> func, | 416 static Handle<Object> MakeNewFunctionEvent(Handle<Object> func, |
417 bool* caught_exception); | 417 bool* caught_exception); |
418 static Handle<Object> MakeCompileEvent(Handle<Script> script, | 418 static Handle<Object> MakeCompileEvent(Handle<Script> script, |
419 bool before, | 419 bool before, |
420 bool* caught_exception); | 420 bool* caught_exception); |
421 static void OnDebugBreak(Handle<Object> break_points_hit); | 421 static void OnDebugBreak(Handle<Object> break_points_hit, bool auto_continue); |
422 static void OnException(Handle<Object> exception, bool uncaught); | 422 static void OnException(Handle<Object> exception, bool uncaught); |
423 static void OnBeforeCompile(Handle<Script> script); | 423 static void OnBeforeCompile(Handle<Script> script); |
424 static void OnAfterCompile(Handle<Script> script, | 424 static void OnAfterCompile(Handle<Script> script, |
425 Handle<JSFunction> fun); | 425 Handle<JSFunction> fun); |
426 static void OnNewFunction(Handle<JSFunction> fun); | 426 static void OnNewFunction(Handle<JSFunction> fun); |
427 static void ProcessDebugEvent(v8::DebugEvent event, | 427 static void ProcessDebugEvent(v8::DebugEvent event, |
428 Handle<Object> event_data); | 428 Handle<Object> event_data, |
| 429 bool auto_continue); |
429 static void SetEventListener(Handle<Object> callback, Handle<Object> data); | 430 static void SetEventListener(Handle<Object> callback, Handle<Object> data); |
430 static void SetMessageHandler(v8::DebugMessageHandler handler, void* data); | 431 static void SetMessageHandler(v8::DebugMessageHandler handler, void* data); |
431 static void SetHostDispatchHandler(v8::DebugHostDispatchHandler handler, | 432 static void SetHostDispatchHandler(v8::DebugHostDispatchHandler handler, |
432 void* data); | 433 void* data); |
433 static void SendMessage(Vector<uint16_t> message); | 434 static void SendMessage(Vector<uint16_t> message); |
434 static void ProcessCommand(Vector<const uint16_t> command); | 435 static void ProcessCommand(Vector<const uint16_t> command); |
| 436 static bool HasCommands(); |
435 static void ProcessHostDispatch(void* dispatch); | 437 static void ProcessHostDispatch(void* dispatch); |
436 static void UpdateActiveDebugger(); | 438 static void UpdateActiveDebugger(); |
437 static Handle<Object> Call(Handle<JSFunction> fun, | 439 static Handle<Object> Call(Handle<JSFunction> fun, |
438 Handle<Object> data, | 440 Handle<Object> data, |
439 bool* pending_exception); | 441 bool* pending_exception); |
440 | 442 |
441 // Start the debugger agent listening on the provided port. | 443 // Start the debugger agent listening on the provided port. |
442 static bool StartAgent(int port); | 444 static bool StartAgent(int port); |
443 | 445 |
444 inline static bool EventActive(v8::DebugEvent event) { | 446 inline static bool EventActive(v8::DebugEvent event) { |
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521 */ | 523 */ |
522 class DebugMessageThread: public Thread { | 524 class DebugMessageThread: public Thread { |
523 public: | 525 public: |
524 DebugMessageThread(); // Called from API thread. | 526 DebugMessageThread(); // Called from API thread. |
525 virtual ~DebugMessageThread(); // Never called. | 527 virtual ~DebugMessageThread(); // Never called. |
526 // Called by V8 thread. Reports events from V8 VM. | 528 // Called by V8 thread. Reports events from V8 VM. |
527 // Also handles command processing in stopped state of V8, | 529 // Also handles command processing in stopped state of V8, |
528 // when host_running_ is false. | 530 // when host_running_ is false. |
529 void DebugEvent(v8::DebugEvent, | 531 void DebugEvent(v8::DebugEvent, |
530 Handle<Object> exec_state, | 532 Handle<Object> exec_state, |
531 Handle<Object> event_data); | 533 Handle<Object> event_data, |
| 534 bool auto_continue); |
532 // Puts event on the output queue. Called by V8. | 535 // Puts event on the output queue. Called by V8. |
533 // This is where V8 hands off | 536 // This is where V8 hands off |
534 // processing of the event to the DebugMessageThread thread, | 537 // processing of the event to the DebugMessageThread thread, |
535 // which forwards it to the debug_message_handler set by the API. | 538 // which forwards it to the debug_message_handler set by the API. |
536 void SendMessage(Vector<uint16_t> event_json); | 539 void SendMessage(Vector<uint16_t> event_json); |
537 // Formats an event into JSON, and calls SendMessage. | 540 // Formats an event into JSON, and calls SendMessage. |
538 bool SetEventJSONFromEvent(Handle<Object> event_data); | 541 bool SetEventJSONFromEvent(Handle<Object> event_data); |
539 // Puts a command coming from the public API on the queue. Called | 542 // Puts a command coming from the public API on the queue. Called |
540 // by the API client thread. This is where the API client hands off | 543 // by the API client thread. This is where the API client hands off |
541 // processing of the command to the DebugMessageThread thread. | 544 // processing of the command to the DebugMessageThread thread. |
542 void ProcessCommand(Vector<uint16_t> command); | 545 void ProcessCommand(Vector<uint16_t> command); |
543 void ProcessHostDispatch(void* dispatch); | 546 void ProcessHostDispatch(void* dispatch); |
544 void OnDebuggerInactive(); | 547 void OnDebuggerInactive(); |
545 | 548 |
546 // Main function of DebugMessageThread thread. | 549 // Main function of DebugMessageThread thread. |
547 void Run(); | 550 void Run(); |
548 | 551 |
| 552 // Check whether there are commands in the queue. |
| 553 bool HasCommands() { return !command_queue_.IsEmpty(); } |
| 554 |
549 bool host_running_; // Is the debugging host running or stopped? | 555 bool host_running_; // Is the debugging host running or stopped? |
550 Semaphore* command_received_; // Non-zero when command queue is non-empty. | 556 Semaphore* command_received_; // Non-zero when command queue is non-empty. |
551 Semaphore* message_received_; // Exactly equal to message queue length. | 557 Semaphore* message_received_; // Exactly equal to message queue length. |
552 private: | 558 private: |
553 bool TwoByteEqualsAscii(Vector<uint16_t> two_byte, const char* ascii); | 559 bool TwoByteEqualsAscii(Vector<uint16_t> two_byte, const char* ascii); |
554 | 560 |
555 static const int kQueueInitialSize = 4; | 561 static const int kQueueInitialSize = 4; |
556 LockingMessageQueue command_queue_; | 562 LockingMessageQueue command_queue_; |
557 LockingMessageQueue message_queue_; | 563 LockingMessageQueue message_queue_; |
558 DISALLOW_COPY_AND_ASSIGN(DebugMessageThread); | 564 DISALLOW_COPY_AND_ASSIGN(DebugMessageThread); |
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609 Debug::SetBreak(break_frame_id_, break_id_); | 615 Debug::SetBreak(break_frame_id_, break_id_); |
610 | 616 |
611 // Request preemption when leaving the last debugger entry and a preemption | 617 // Request preemption when leaving the last debugger entry and a preemption |
612 // had been recorded while debugging. This is to avoid starvation in some | 618 // had been recorded while debugging. This is to avoid starvation in some |
613 // debugging scenarios. | 619 // debugging scenarios. |
614 if (prev_ == NULL && Debug::preemption_pending()) { | 620 if (prev_ == NULL && Debug::preemption_pending()) { |
615 StackGuard::Preempt(); | 621 StackGuard::Preempt(); |
616 Debug::set_preemption_pending(false); | 622 Debug::set_preemption_pending(false); |
617 } | 623 } |
618 | 624 |
| 625 // If there are commands in the queue when leaving the debugger request that |
| 626 // these commands are processed. |
| 627 if (prev_ == NULL && Debugger::HasCommands()) { |
| 628 StackGuard::DebugCommand(); |
| 629 } |
| 630 |
619 // Leaving this debugger entry. | 631 // Leaving this debugger entry. |
620 Debug::set_debugger_entry(prev_); | 632 Debug::set_debugger_entry(prev_); |
621 } | 633 } |
622 | 634 |
623 // Check whether the debugger could be entered. | 635 // Check whether the debugger could be entered. |
624 inline bool FailedToEnter() { return load_failed_; } | 636 inline bool FailedToEnter() { return load_failed_; } |
625 | 637 |
626 // Check whether there are any JavaScript frames on the stack. | 638 // Check whether there are any JavaScript frames on the stack. |
627 inline bool HasJavaScriptFrames() { return has_js_frames_; } | 639 inline bool HasJavaScriptFrames() { return has_js_frames_; } |
628 | 640 |
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693 } | 705 } |
694 private: | 706 private: |
695 Debug::AddressId id_; | 707 Debug::AddressId id_; |
696 int reg_; | 708 int reg_; |
697 }; | 709 }; |
698 | 710 |
699 | 711 |
700 } } // namespace v8::internal | 712 } } // namespace v8::internal |
701 | 713 |
702 #endif // V8_V8_DEBUG_H_ | 714 #endif // V8_V8_DEBUG_H_ |
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