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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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470 | 470 |
471 RelocInfo::Mode mode = rmode(); | 471 RelocInfo::Mode mode = rmode(); |
472 if (RelocInfo::IsCodeTarget(mode)) { | 472 if (RelocInfo::IsCodeTarget(mode)) { |
473 Address target = rinfo()->target_address(); | 473 Address target = rinfo()->target_address(); |
474 Handle<Code> code(Code::GetCodeFromTargetAddress(target)); | 474 Handle<Code> code(Code::GetCodeFromTargetAddress(target)); |
475 | 475 |
476 // Patch the code to invoke the builtin debug break function matching the | 476 // Patch the code to invoke the builtin debug break function matching the |
477 // calling convention used by the call site. | 477 // calling convention used by the call site. |
478 Handle<Code> dbgbrk_code(Debug::FindDebugBreak(code, mode)); | 478 Handle<Code> dbgbrk_code(Debug::FindDebugBreak(code, mode)); |
479 rinfo()->set_target_address(dbgbrk_code->entry()); | 479 rinfo()->set_target_address(dbgbrk_code->entry()); |
480 | |
481 // For stubs that refer back to an inlined version clear the cached map for | |
482 // the inlined case to always go through the IC. As long as the break point | |
483 // is set the patching performed by the runtime system will take place in | |
484 // the code copy and will therefore have no effect on the running code | |
485 // keeping it from using the inlined code. | |
486 if (code->is_keyed_load_stub()) { | |
487 KeyedLoadIC::ClearInlinedVersion(pc()); | |
488 } else if (code->is_keyed_store_stub()) { | |
489 KeyedStoreIC::ClearInlinedVersion(pc()); | |
490 } else if (code->is_load_stub()) { | |
491 LoadIC::ClearInlinedVersion(pc()); | |
492 } else if (code->is_store_stub()) { | |
493 StoreIC::ClearInlinedVersion(pc()); | |
494 } | |
495 } | 480 } |
496 } | 481 } |
497 | 482 |
498 | 483 |
499 void BreakLocationIterator::ClearDebugBreakAtIC() { | 484 void BreakLocationIterator::ClearDebugBreakAtIC() { |
500 // Patch the code to the original invoke. | 485 // Patch the code to the original invoke. |
501 rinfo()->set_target_address(original_rinfo()->target_address()); | 486 rinfo()->set_target_address(original_rinfo()->target_address()); |
502 | |
503 RelocInfo::Mode mode = rmode(); | |
504 if (RelocInfo::IsCodeTarget(mode)) { | |
505 AssertNoAllocation nogc; | |
506 Address target = original_rinfo()->target_address(); | |
507 Code* code = Code::GetCodeFromTargetAddress(target); | |
508 | |
509 // Restore the inlined version of keyed stores to get back to the | |
510 // fast case. We need to patch back the keyed store because no | |
511 // patching happens when running normally. For keyed loads, the | |
512 // map check will get patched back when running normally after ICs | |
513 // have been cleared at GC. | |
514 if (code->is_keyed_store_stub()) KeyedStoreIC::RestoreInlinedVersion(pc()); | |
515 } | |
516 } | 487 } |
517 | 488 |
518 | 489 |
519 bool BreakLocationIterator::IsDebuggerStatement() { | 490 bool BreakLocationIterator::IsDebuggerStatement() { |
520 return RelocInfo::DEBUG_BREAK == rmode(); | 491 return RelocInfo::DEBUG_BREAK == rmode(); |
521 } | 492 } |
522 | 493 |
523 | 494 |
524 bool BreakLocationIterator::IsDebugBreakSlot() { | 495 bool BreakLocationIterator::IsDebugBreakSlot() { |
525 return RelocInfo::DEBUG_BREAK_SLOT == rmode(); | 496 return RelocInfo::DEBUG_BREAK_SLOT == rmode(); |
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3179 { | 3150 { |
3180 Locker locker; | 3151 Locker locker; |
3181 Isolate::Current()->debugger()->CallMessageDispatchHandler(); | 3152 Isolate::Current()->debugger()->CallMessageDispatchHandler(); |
3182 } | 3153 } |
3183 } | 3154 } |
3184 } | 3155 } |
3185 | 3156 |
3186 #endif // ENABLE_DEBUGGER_SUPPORT | 3157 #endif // ENABLE_DEBUGGER_SUPPORT |
3187 | 3158 |
3188 } } // namespace v8::internal | 3159 } } // namespace v8::internal |
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