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1 /* | 1 /* |
2 * Copyright (C) 2009 Google Inc. All rights reserved. | 2 * Copyright (C) 2009 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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387 // for tests that force GCs from JavaScript to verify that objects die | 387 // for tests that force GCs from JavaScript to verify that objects die |
388 // when expected, or when handling memory pressure notifications. | 388 // when expected, or when handling memory pressure notifications. |
389 bool forceGC = flags & v8::kGCCallbackFlagForced; | 389 bool forceGC = flags & v8::kGCCallbackFlagForced; |
390 | 390 |
391 // FIXME: It would be nice if the GC callbacks passed the Isolate directly..
.. | 391 // FIXME: It would be nice if the GC callbacks passed the Isolate directly..
.. |
392 v8::Isolate* isolate = v8::Isolate::GetCurrent(); | 392 v8::Isolate* isolate = v8::Isolate::GetCurrent(); |
393 if (type == v8::kGCTypeScavenge) { | 393 if (type == v8::kGCTypeScavenge) { |
394 minorGCEpilogue(isolate); | 394 minorGCEpilogue(isolate); |
395 } else if (type == v8::kGCTypeMarkSweepCompact) { | 395 } else if (type == v8::kGCTypeMarkSweepCompact) { |
396 majorGCEpilogue(isolate); | 396 majorGCEpilogue(isolate); |
397 if (!forceGC) | |
398 ThreadState::current()->didV8MajorGC(); | |
399 } | 397 } |
400 | 398 |
401 if (forceGC) { | 399 if (forceGC) { |
402 // This single GC is not enough for two reasons: | 400 // This single GC is not enough for two reasons: |
403 // (1) The GC is not precise because the GC scans on-stack pointers co
nservatively. | 401 // (1) The GC is not precise because the GC scans on-stack pointers co
nservatively. |
404 // (2) One GC is not enough to break a chain of persistent handles. It
's possible that | 402 // (2) One GC is not enough to break a chain of persistent handles. It
's possible that |
405 // some heap allocated objects own objects that contain persistent
handles | 403 // some heap allocated objects own objects that contain persistent
handles |
406 // pointing to other heap allocated objects. To break the chain, w
e need multiple GCs. | 404 // pointing to other heap allocated objects. To break the chain, w
e need multiple GCs. |
407 // | 405 // |
408 // Regarding (1), we force a precise GC at the end of the current event
loop. So if you want | 406 // Regarding (1), we force a precise GC at the end of the current event
loop. So if you want |
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501 Visitor* m_visitor; | 499 Visitor* m_visitor; |
502 }; | 500 }; |
503 | 501 |
504 void V8GCController::traceDOMWrappers(v8::Isolate* isolate, Visitor* visitor) | 502 void V8GCController::traceDOMWrappers(v8::Isolate* isolate, Visitor* visitor) |
505 { | 503 { |
506 DOMWrapperTracer tracer(visitor); | 504 DOMWrapperTracer tracer(visitor); |
507 v8::V8::VisitHandlesWithClassIds(isolate, &tracer); | 505 v8::V8::VisitHandlesWithClassIds(isolate, &tracer); |
508 } | 506 } |
509 | 507 |
510 } // namespace blink | 508 } // namespace blink |
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