christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame^] | 1 | // Copyright 2006-2008 Google Inc. All Rights Reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_DEBUG_H_ |
| 29 | #define V8_DEBUG_H_ |
| 30 | |
| 31 | #include "../public/debug.h" |
| 32 | #include "assembler.h" |
| 33 | #include "code-stubs.h" |
| 34 | #include "factory.h" |
| 35 | #include "platform.h" |
| 36 | #include "string-stream.h" |
| 37 | |
| 38 | |
| 39 | namespace v8 { namespace internal { |
| 40 | |
| 41 | // Step actions. NOTE: These values are in macros.py as well. |
| 42 | enum StepAction { |
| 43 | StepNone = -1, // Stepping not prepared. |
| 44 | StepOut = 0, // Step out of the current function. |
| 45 | StepNext = 1, // Step to the next statement in the current function. |
| 46 | StepIn = 2, // Step into new functions invoked or the next statement |
| 47 | // in the current function. |
| 48 | StepMin = 3, // Perform a minimum step in the current function. |
| 49 | StepInMin = 4 // Step into new functions invoked or perform a minimum step |
| 50 | // in the current function. |
| 51 | }; |
| 52 | |
| 53 | |
| 54 | // Type of exception break. NOTE: These values are in macros.py as well. |
| 55 | enum ExceptionBreakType { |
| 56 | BreakException = 0, |
| 57 | BreakUncaughtException = 1 |
| 58 | }; |
| 59 | |
| 60 | |
| 61 | // Type of exception break. NOTE: These values are in macros.py as well. |
| 62 | enum BreakLocatorType { |
| 63 | ALL_BREAK_LOCATIONS = 0, |
| 64 | SOURCE_BREAK_LOCATIONS = 1 |
| 65 | }; |
| 66 | |
| 67 | |
| 68 | // Class for iterating through the break points in a function and changing |
| 69 | // them. |
| 70 | class BreakLocationIterator { |
| 71 | public: |
| 72 | explicit BreakLocationIterator(Handle<DebugInfo> debug_info, |
| 73 | BreakLocatorType type); |
| 74 | virtual ~BreakLocationIterator(); |
| 75 | |
| 76 | void Next(); |
| 77 | void Next(int count); |
| 78 | void FindBreakLocationFromAddress(Address pc); |
| 79 | void FindBreakLocationFromPosition(int position); |
| 80 | void Reset(); |
| 81 | bool Done() const; |
| 82 | void SetBreakPoint(Handle<Object> break_point_object); |
| 83 | void ClearBreakPoint(Handle<Object> break_point_object); |
| 84 | void SetOneShot(); |
| 85 | void ClearOneShot(); |
| 86 | void PrepareStepIn(); |
| 87 | bool IsExit() const; |
| 88 | bool HasBreakPoint(); |
| 89 | bool IsDebugBreak(); |
| 90 | Object* BreakPointObjects(); |
| 91 | |
| 92 | |
| 93 | inline int code_position() { return pc() - debug_info_->code()->entry(); } |
| 94 | inline int break_point() { return break_point_; } |
| 95 | inline int position() { return position_; } |
| 96 | inline int statement_position() { return statement_position_; } |
| 97 | inline Address pc() { return reloc_iterator_->rinfo()->pc(); } |
| 98 | inline Code* code() { return debug_info_->code(); } |
| 99 | inline RelocInfo* rinfo() { return reloc_iterator_->rinfo(); } |
| 100 | inline RelocMode rmode() const { return reloc_iterator_->rinfo()->rmode(); } |
| 101 | inline RelocInfo* original_rinfo() { |
| 102 | return reloc_iterator_original_->rinfo(); |
| 103 | } |
| 104 | inline RelocMode original_rmode() const { |
| 105 | return reloc_iterator_original_->rinfo()->rmode(); |
| 106 | } |
| 107 | |
| 108 | protected: |
| 109 | bool RinfoDone() const; |
| 110 | void RinfoNext(); |
| 111 | |
| 112 | BreakLocatorType type_; |
| 113 | int break_point_; |
| 114 | int position_; |
| 115 | int statement_position_; |
| 116 | Handle<DebugInfo> debug_info_; |
| 117 | RelocIterator* reloc_iterator_; |
| 118 | RelocIterator* reloc_iterator_original_; |
| 119 | |
| 120 | private: |
| 121 | void SetDebugBreak(); |
| 122 | void ClearDebugBreak(); |
| 123 | |
| 124 | DISALLOW_EVIL_CONSTRUCTORS(BreakLocationIterator); |
| 125 | }; |
| 126 | |
| 127 | |
| 128 | // Linked list holding debug info objects. The debug info objects are kept as |
| 129 | // weak handles to avoid a debug info object to keep a function alive. |
| 130 | class DebugInfoListNode { |
| 131 | public: |
| 132 | explicit DebugInfoListNode(DebugInfo* debug_info); |
| 133 | virtual ~DebugInfoListNode(); |
| 134 | |
| 135 | DebugInfoListNode* next() { return next_; } |
| 136 | void set_next(DebugInfoListNode* next) { next_ = next; } |
| 137 | Handle<DebugInfo> debug_info() { return debug_info_; } |
| 138 | |
| 139 | private: |
| 140 | // Global (weak) handle to the debug info object. |
| 141 | Handle<DebugInfo> debug_info_; |
| 142 | |
| 143 | // Next pointer for linked list. |
| 144 | DebugInfoListNode* next_; |
| 145 | }; |
| 146 | |
| 147 | |
| 148 | // This class contains the debugger support. The main purpose is to handle |
| 149 | // setting break points in the code. |
| 150 | // |
| 151 | // This class controls the debug info for all functions which currently have |
| 152 | // active breakpoints in them. This debug info is held in the heap root object |
| 153 | // debug_info which is a FixedArray. Each entry in this list is of class |
| 154 | // DebugInfo. |
| 155 | class Debug { |
| 156 | public: |
| 157 | static void Setup(bool create_heap_objects); |
| 158 | static bool Load(); |
| 159 | static void Unload(); |
| 160 | static bool IsLoaded() { return !debug_context_.is_null(); } |
| 161 | static bool InDebugger() { return Top::is_break(); } |
| 162 | static void Iterate(ObjectVisitor* v); |
| 163 | |
| 164 | static Object* Break(Arguments args); |
| 165 | static void SetBreakPoint(Handle<SharedFunctionInfo> shared, |
| 166 | int source_position, |
| 167 | Handle<Object> break_point_object); |
| 168 | static void ClearBreakPoint(Handle<Object> break_point_object); |
| 169 | static void FloodWithOneShot(Handle<SharedFunctionInfo> shared); |
| 170 | static void FloodHandlerWithOneShot(); |
| 171 | static void ChangeBreakOnException(ExceptionBreakType type, bool enable); |
| 172 | static void PrepareStep(StepAction step_action, int step_count); |
| 173 | static void ClearStepping(); |
| 174 | static bool StepNextContinue(BreakLocationIterator* break_location_iterator, |
| 175 | JavaScriptFrame* frame); |
| 176 | static Handle<DebugInfo> GetDebugInfo(Handle<SharedFunctionInfo> shared); |
| 177 | static bool HasDebugInfo(Handle<SharedFunctionInfo> shared); |
| 178 | static bool IsDebugBreak(Address addr); |
| 179 | |
| 180 | // Check whether a code stub with the specified major key is a possible break |
| 181 | // point location. |
| 182 | static bool IsSourceBreakStub(Code* code); |
| 183 | static bool IsBreakStub(Code* code); |
| 184 | |
| 185 | // Find the builtin to use for invoking the debug break |
| 186 | static Handle<Code> FindDebugBreak(RelocInfo* rinfo); |
| 187 | |
| 188 | static Handle<Object> GetSourceBreakLocations( |
| 189 | Handle<SharedFunctionInfo> shared); |
| 190 | static Code* GetCodeTarget(Address target); |
| 191 | |
| 192 | // Getter for the debug_context. |
| 193 | inline static Handle<Context> debug_context() { return debug_context_; } |
| 194 | |
| 195 | // Check whether a global object is the debug global object. |
| 196 | static bool IsDebugGlobal(GlobalObject* global); |
| 197 | |
| 198 | // Fast check to see if any break points are active. |
| 199 | inline static bool has_break_points() { return has_break_points_; } |
| 200 | |
| 201 | static bool StepInActive() { return thread_local_.step_into_fp_ != 0; } |
| 202 | static Address step_in_fp() { return thread_local_.step_into_fp_; } |
| 203 | static Address* step_in_fp_addr() { return &thread_local_.step_into_fp_; } |
| 204 | |
| 205 | // Getters for the current exception break state. |
| 206 | static bool break_on_exception() { return break_on_exception_; } |
| 207 | static bool break_on_uncaught_exception() { |
| 208 | return break_on_uncaught_exception_; |
| 209 | } |
| 210 | |
| 211 | enum AddressId { |
| 212 | k_after_break_target_address, |
| 213 | k_debug_break_return_address, |
| 214 | k_register_address |
| 215 | }; |
| 216 | |
| 217 | // Support for setting the address to jump to when returning from break point. |
| 218 | static Address* after_break_target_address() { |
| 219 | return reinterpret_cast<Address*>(&thread_local_.after_break_target_); |
| 220 | } |
| 221 | |
| 222 | // Support for saving/restoring registers when handling debug break calls. |
| 223 | static Address* register_address(int r) { |
| 224 | return reinterpret_cast<Address *>(®isters_[r]); |
| 225 | } |
| 226 | |
| 227 | // Addres of the debug break return entry code. |
| 228 | static Code* debug_break_return_entry() { return debug_break_return_entry_; } |
| 229 | |
| 230 | // Support for getting the address of the debug break on return code. |
| 231 | static Address* debug_break_return_address() { |
| 232 | return reinterpret_cast<Address*>(&debug_break_return_); |
| 233 | } |
| 234 | |
| 235 | static const int kEstimatedNofDebugInfoEntries = 16; |
| 236 | static const int kEstimatedNofBreakPointsInFunction = 16; |
| 237 | |
| 238 | static void HandleWeakDebugInfo(v8::Persistent<v8::Object> obj, void* data); |
| 239 | |
| 240 | friend class Debugger; |
| 241 | friend Handle<FixedArray> GetDebuggedFunctions(); // Found in test-debug.cc |
| 242 | |
| 243 | // Threading support. |
| 244 | static char* ArchiveDebug(char* to); |
| 245 | static char* RestoreDebug(char* from); |
| 246 | static int ArchiveSpacePerThread(); |
| 247 | |
| 248 | // Code generation assumptions. |
| 249 | static const int kIa32CallInstructionLength = 5; |
| 250 | static const int kIa32JSReturnSequenceLength = 6; |
| 251 | |
| 252 | private: |
| 253 | static bool CompileDebuggerScript(int index); |
| 254 | static void ClearOneShot(); |
| 255 | static void ActivateStepIn(StackFrame* frame); |
| 256 | static void ClearStepIn(); |
| 257 | static void ClearStepNext(); |
| 258 | static void EnsureCompiled(Handle<SharedFunctionInfo> shared); |
| 259 | static Handle<DebugInfo> AddDebugInfo(Handle<SharedFunctionInfo> shared); |
| 260 | static void RemoveDebugInfo(Handle<DebugInfo> debug_info); |
| 261 | static void SetAfterBreakTarget(JavaScriptFrame* frame); |
| 262 | static Handle<Object> CheckBreakPoints(Handle<Object> break_point); |
| 263 | static bool CheckBreakPoint(Handle<Object> break_point_object); |
| 264 | |
| 265 | // Global handle to debug context where all the debugger JavaScript code is |
| 266 | // loaded. |
| 267 | static Handle<Context> debug_context_; |
| 268 | |
| 269 | // Boolean state indicating whether any break points are set. |
| 270 | static bool has_break_points_; |
| 271 | static DebugInfoListNode* debug_info_list_; |
| 272 | |
| 273 | static bool break_on_exception_; |
| 274 | static bool break_on_uncaught_exception_; |
| 275 | |
| 276 | // Per-thread: |
| 277 | class ThreadLocal { |
| 278 | public: |
| 279 | // Step action for last step performed. |
| 280 | StepAction last_step_action_; |
| 281 | |
| 282 | // Source statement position from last step next action. |
| 283 | int last_statement_position_; |
| 284 | |
| 285 | // Number of steps left to perform before debug event. |
| 286 | int step_count_; |
| 287 | |
| 288 | // Frame pointer from last step next action. |
| 289 | Address last_fp_; |
| 290 | |
| 291 | // Frame pointer for frame from which step in was performed. |
| 292 | Address step_into_fp_; |
| 293 | |
| 294 | // Storage location for jump when exiting debug break calls. |
| 295 | Address after_break_target_; |
| 296 | }; |
| 297 | |
| 298 | // Storage location for registers when handling debug break calls |
| 299 | static JSCallerSavedBuffer registers_; |
| 300 | static ThreadLocal thread_local_; |
| 301 | static void ThreadInit(); |
| 302 | |
| 303 | // Code object for debug break return entry code. |
| 304 | static Code* debug_break_return_entry_; |
| 305 | |
| 306 | // Code to call for handling debug break on return. |
| 307 | static Code* debug_break_return_; |
| 308 | |
| 309 | DISALLOW_EVIL_CONSTRUCTORS(Debug); |
| 310 | }; |
| 311 | |
| 312 | |
| 313 | class PendingRequest; |
| 314 | class DebugMessageThread; |
| 315 | |
| 316 | |
| 317 | class Debugger { |
| 318 | public: |
| 319 | static void DebugRequest(const uint16_t* json_request, int length); |
| 320 | static bool ProcessPendingRequests(); |
| 321 | |
| 322 | static Handle<Object> MakeJSObject(Vector<const char> constructor_name, |
| 323 | int argc, Object*** argv, |
| 324 | bool* caught_exception); |
| 325 | static Handle<Object> MakeExecutionState(bool* caught_exception); |
| 326 | static Handle<Object> MakeBreakEvent(Handle<Object> exec_state, |
| 327 | Handle<Object> break_points_hit, |
| 328 | bool* caught_exception); |
| 329 | static Handle<Object> MakeExceptionEvent(Handle<Object> exec_state, |
| 330 | Handle<Object> exception, |
| 331 | bool uncaught, |
| 332 | bool* caught_exception); |
| 333 | static Handle<Object> MakeNewFunctionEvent(Handle<Object> func, |
| 334 | bool* caught_exception); |
| 335 | static Handle<Object> MakeCompileEvent(Handle<Script> script, |
| 336 | Handle<Object> script_function, |
| 337 | bool* caught_exception); |
| 338 | static Handle<String> ProcessRequest(Handle<Object> exec_state, |
| 339 | Handle<Object> request, |
| 340 | bool stopped); |
| 341 | static bool IsPlainBreakRequest(Handle<Object> request); |
| 342 | |
| 343 | static void OnDebugBreak(Handle<Object> break_points_hit); |
| 344 | static void OnException(Handle<Object> exception, bool uncaught); |
| 345 | static void OnBeforeCompile(Handle<Script> script); |
| 346 | static void OnAfterCompile(Handle<Script> script, |
| 347 | Handle<JSFunction> fun); |
| 348 | static void OnNewFunction(Handle<JSFunction> fun); |
| 349 | static void OnPendingRequestProcessed(Handle<Object> event_data); |
| 350 | static void ProcessDebugEvent(v8::DebugEvent event, |
| 351 | Handle<Object> event_data); |
| 352 | static void SetMessageHandler(v8::DebugMessageHandler handler, void* data); |
| 353 | static void SendMessage(Vector<uint16_t> message); |
| 354 | static void ProcessCommand(Vector<const uint16_t> command); |
| 355 | static void UpdateActiveDebugger(); |
| 356 | inline static bool EventActive(v8::DebugEvent event) { |
| 357 | // Currently argument event is not used. |
| 358 | return !Debugger::compiling_natives_ && Debugger::debugger_active_; |
| 359 | } |
| 360 | |
| 361 | static void set_debugger_active(bool debugger_active) { |
| 362 | Debugger::debugger_active_ = debugger_active; |
| 363 | } |
| 364 | static bool debugger_active() { return Debugger::debugger_active_; } |
| 365 | static void set_compiling_natives(bool compiling_natives) { |
| 366 | Debugger::compiling_natives_ = compiling_natives; |
| 367 | } |
| 368 | static bool compiling_natives() { return Debugger::compiling_natives_; } |
| 369 | |
| 370 | private: |
| 371 | static bool debugger_active_; // Are there any active debugger? |
| 372 | static bool compiling_natives_; // Are we compiling natives? |
| 373 | static DebugMessageThread* message_thread_; |
| 374 | static v8::DebugMessageHandler debug_message_handler_; |
| 375 | static void* debug_message_handler_data_; |
| 376 | |
| 377 | // Head and tail of linked list of pending commands. The list is protected |
| 378 | // by a mutex as it can be updated/read from different threads. |
| 379 | static Mutex* pending_requests_access_; |
| 380 | static PendingRequest* pending_requests_head_; |
| 381 | static PendingRequest* pending_requests_tail_; |
| 382 | }; |
| 383 | |
| 384 | |
| 385 | // Linked list of pending requests issued by debugger while V8 was running. |
| 386 | class PendingRequest { |
| 387 | public: |
| 388 | PendingRequest(const uint16_t* json_request, int length); |
| 389 | ~PendingRequest(); |
| 390 | |
| 391 | PendingRequest* next() { return next_; } |
| 392 | void set_next(PendingRequest* next) { next_ = next; } |
| 393 | Handle<String> request(); |
| 394 | |
| 395 | private: |
| 396 | Vector<uint16_t> json_request_; // Request string. |
| 397 | PendingRequest* next_; // Next pointer for linked list. |
| 398 | }; |
| 399 | |
| 400 | |
| 401 | class DebugMessageThread: public Thread { |
| 402 | public: |
| 403 | DebugMessageThread(); |
| 404 | virtual ~DebugMessageThread(); |
| 405 | |
| 406 | void DebugEvent(v8::DebugEvent, |
| 407 | Handle<Object> exec_state, |
| 408 | Handle<Object> event_data); |
| 409 | void SetEventJSON(Vector<uint16_t> event_json); |
| 410 | void SetEventJSONFromEvent(Handle<Object> event_data); |
| 411 | void SetCommand(Vector<uint16_t> command); |
| 412 | void SetResult(const char* result); |
| 413 | void SetResult(Vector<uint16_t> result); |
| 414 | void CommandResult(Vector<uint16_t> result); |
| 415 | |
| 416 | void ProcessCommand(Vector<uint16_t> command); |
| 417 | |
| 418 | void OnDebuggerInactive(); |
| 419 | |
| 420 | protected: |
| 421 | void Run(); |
| 422 | void HandleCommand(); |
| 423 | |
| 424 | bool host_running_; // Is the debugging host running or stopped |
| 425 | v8::DebugEvent event_; // Active event |
| 426 | Semaphore* command_received_; // Signal from the telnet connection |
| 427 | Semaphore* debug_event_; // Signal from the V8 thread |
| 428 | Semaphore* debug_command_; // Signal to the V8 thread |
| 429 | Semaphore* debug_result_; // Signal from the V8 thread |
| 430 | |
| 431 | private: |
| 432 | void SetVector(Vector<uint16_t>* vector, Vector<uint16_t> value); |
| 433 | bool TwoByteEqualsAscii(Vector<uint16_t> two_byte, const char* ascii); |
| 434 | |
| 435 | Vector<uint16_t> event_json_; // Active event JSON. |
| 436 | Vector<uint16_t> command_; // Current command. |
| 437 | Vector<uint16_t> result_; // Result of processing command. |
| 438 | DISALLOW_EVIL_CONSTRUCTORS(DebugMessageThread); |
| 439 | }; |
| 440 | |
| 441 | |
| 442 | // Helper class to support saving/restoring the top break frame id. |
| 443 | class SaveBreakFrame { |
| 444 | public: |
| 445 | SaveBreakFrame() : set_(!it_.done()) { |
| 446 | if (set_) { |
| 447 | // Store the previous break is and frame id. |
| 448 | break_id_ = Top::break_id(); |
| 449 | break_frame_id_ = Top::break_frame_id(); |
| 450 | |
| 451 | // Create the new break info. |
| 452 | Top::new_break(it_.frame()->id()); |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | ~SaveBreakFrame() { |
| 457 | if (set_) { |
| 458 | // restore to the previous break state. |
| 459 | Top::set_break(break_frame_id_, break_id_); |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | private: |
| 464 | JavaScriptFrameIterator it_; |
| 465 | const bool set_; // Was the break actually set? |
| 466 | StackFrame::Id break_frame_id_; // Previous break frame id. |
| 467 | int break_id_; // Previous break id. |
| 468 | }; |
| 469 | |
| 470 | |
| 471 | class EnterDebuggerContext BASE_EMBEDDED { |
| 472 | public: |
| 473 | // Enter the debugger by storing the previous top context and setting the |
| 474 | // current top context to the debugger context. |
| 475 | EnterDebuggerContext() { |
| 476 | // NOTE the member variable save which saves the previous context before |
| 477 | // this change. |
| 478 | Top::set_context(*Debug::debug_context()); |
| 479 | Top::set_security_context(*Debug::debug_context()); |
| 480 | } |
| 481 | |
| 482 | private: |
| 483 | SaveContext save; |
| 484 | }; |
| 485 | |
| 486 | |
| 487 | // Debug_Address encapsulates the Address pointers used in generating debug |
| 488 | // code. |
| 489 | class Debug_Address { |
| 490 | public: |
| 491 | Debug_Address(Debug::AddressId id, int reg = 0) |
| 492 | : id_(id), reg_(reg) { |
| 493 | ASSERT(reg == 0 || id == Debug::k_register_address); |
| 494 | } |
| 495 | |
| 496 | static Debug_Address AfterBreakTarget() { |
| 497 | return Debug_Address(Debug::k_after_break_target_address); |
| 498 | } |
| 499 | |
| 500 | static Debug_Address DebugBreakReturn() { |
| 501 | return Debug_Address(Debug::k_debug_break_return_address); |
| 502 | } |
| 503 | |
| 504 | static Debug_Address Register(int reg) { |
| 505 | return Debug_Address(Debug::k_register_address, reg); |
| 506 | } |
| 507 | |
| 508 | Address address() const { |
| 509 | switch (id_) { |
| 510 | case Debug::k_after_break_target_address: |
| 511 | return reinterpret_cast<Address>(Debug::after_break_target_address()); |
| 512 | case Debug::k_debug_break_return_address: |
| 513 | return reinterpret_cast<Address>(Debug::debug_break_return_address()); |
| 514 | case Debug::k_register_address: |
| 515 | return reinterpret_cast<Address>(Debug::register_address(reg_)); |
| 516 | default: |
| 517 | UNREACHABLE(); |
| 518 | return NULL; |
| 519 | } |
| 520 | } |
| 521 | private: |
| 522 | Debug::AddressId id_; |
| 523 | int reg_; |
| 524 | }; |
| 525 | |
| 526 | |
| 527 | } } // namespace v8::internal |
| 528 | |
| 529 | #endif // V8_DEBUG_H_ |