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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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389 // See collectGarbageForTerminatingThread() comment on why a | 389 // See collectGarbageForTerminatingThread() comment on why a |
390 // safepoint scope isn't entered for it. | 390 // safepoint scope isn't entered for it. |
391 SafePointScope safePointScope(stackState, gcType != BlinkGC::ThreadTerminati
onGC ? state : nullptr); | 391 SafePointScope safePointScope(stackState, gcType != BlinkGC::ThreadTerminati
onGC ? state : nullptr); |
392 | 392 |
393 // Try to park the other threads. If we're unable to, bail out of the GC. | 393 // Try to park the other threads. If we're unable to, bail out of the GC. |
394 if (!gcScope.parkAllThreads(stackState, gcType)) | 394 if (!gcScope.parkAllThreads(stackState, gcType)) |
395 return; | 395 return; |
396 | 396 |
397 // Resume all parked threads upon leaving this scope. | 397 // Resume all parked threads upon leaving this scope. |
398 ResumeThreadScope resumeThreads(gcType); | 398 ResumeThreadScope resumeThreads(gcType); |
399 | 399 ScriptForbiddenIfMainThreadScope scriptForbidden; |
400 if (state->isMainThread()) | |
401 ScriptForbiddenScope::enter(); | |
402 | 400 |
403 TRACE_EVENT2("blink_gc", "Heap::collectGarbage", | 401 TRACE_EVENT2("blink_gc", "Heap::collectGarbage", |
404 "lazySweeping", gcType == BlinkGC::GCWithoutSweep, | 402 "lazySweeping", gcType == BlinkGC::GCWithoutSweep, |
405 "gcReason", gcReasonString(reason)); | 403 "gcReason", gcReasonString(reason)); |
406 TRACE_EVENT_SCOPED_SAMPLING_STATE("blink_gc", "BlinkGC"); | 404 TRACE_EVENT_SCOPED_SAMPLING_STATE("blink_gc", "BlinkGC"); |
407 double startTime = WTF::currentTimeMS(); | 405 double startTime = WTF::currentTimeMS(); |
408 | 406 |
409 if (gcType == BlinkGC::TakeSnapshot) | 407 if (gcType == BlinkGC::TakeSnapshot) |
410 BlinkGCMemoryDumpProvider::instance()->clearProcessDumpForCurrentGC(); | 408 BlinkGCMemoryDumpProvider::instance()->clearProcessDumpForCurrentGC(); |
411 | 409 |
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454 WTF::Partitions::reportMemoryUsageHistogram(); | 452 WTF::Partitions::reportMemoryUsageHistogram(); |
455 | 453 |
456 postGC(gcType); | 454 postGC(gcType); |
457 | 455 |
458 #if ENABLE(ASSERT) | 456 #if ENABLE(ASSERT) |
459 // 0 is used to figure non-assigned area, so avoid to use 0 in s_gcGeneratio
n. | 457 // 0 is used to figure non-assigned area, so avoid to use 0 in s_gcGeneratio
n. |
460 if (++s_gcGeneration == 0) { | 458 if (++s_gcGeneration == 0) { |
461 s_gcGeneration = 1; | 459 s_gcGeneration = 1; |
462 } | 460 } |
463 #endif | 461 #endif |
464 | |
465 if (state->isMainThread()) | |
466 ScriptForbiddenScope::exit(); | |
467 } | 462 } |
468 | 463 |
469 void Heap::collectGarbageForTerminatingThread(ThreadState* state) | 464 void Heap::collectGarbageForTerminatingThread(ThreadState* state) |
470 { | 465 { |
471 { | 466 { |
472 // A thread-specific termination GC must not allow other global GCs to g
o | 467 // A thread-specific termination GC must not allow other global GCs to g
o |
473 // ahead while it is running, hence the termination GC does not enter a | 468 // ahead while it is running, hence the termination GC does not enter a |
474 // safepoint. GCScope will not enter also a safepoint scope for | 469 // safepoint. GCScope will not enter also a safepoint scope for |
475 // ThreadTerminationGC. | 470 // ThreadTerminationGC. |
476 GCScope gcScope(state, BlinkGC::NoHeapPointersOnStack, BlinkGC::ThreadTe
rminationGC); | 471 GCScope gcScope(state, BlinkGC::NoHeapPointersOnStack, BlinkGC::ThreadTe
rminationGC); |
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769 size_t Heap::s_wrapperCount = 0; | 764 size_t Heap::s_wrapperCount = 0; |
770 size_t Heap::s_wrapperCountAtLastGC = 0; | 765 size_t Heap::s_wrapperCountAtLastGC = 0; |
771 size_t Heap::s_collectedWrapperCount = 0; | 766 size_t Heap::s_collectedWrapperCount = 0; |
772 size_t Heap::s_partitionAllocSizeAtLastGC = 0; | 767 size_t Heap::s_partitionAllocSizeAtLastGC = 0; |
773 double Heap::s_estimatedMarkingTimePerByte = 0.0; | 768 double Heap::s_estimatedMarkingTimePerByte = 0.0; |
774 #if ENABLE(ASSERT) | 769 #if ENABLE(ASSERT) |
775 uint16_t Heap::s_gcGeneration = 0; | 770 uint16_t Heap::s_gcGeneration = 0; |
776 #endif | 771 #endif |
777 | 772 |
778 } // namespace blink | 773 } // namespace blink |
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