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Issue 1961083005: V8_EXPORT EmbedderHeapTracer (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 7 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 /** \mainpage V8 API Reference Guide 5 /** \mainpage V8 API Reference Guide
6 * 6 *
7 * V8 is Google's open source JavaScript engine. 7 * V8 is Google's open source JavaScript engine.
8 * 8 *
9 * This set of documents provides reference material generated from the 9 * This set of documents provides reference material generated from the
10 * V8 header file, include/v8.h. 10 * V8 header file, include/v8.h.
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5397 * Interface for tracing through the embedder heap. During the v8 garbage 5397 * Interface for tracing through the embedder heap. During the v8 garbage
5398 * collection, v8 collects hidden fields of all potential wrappers, and at the 5398 * collection, v8 collects hidden fields of all potential wrappers, and at the
5399 * end of its marking phase iterates the collection and asks the embedder to 5399 * end of its marking phase iterates the collection and asks the embedder to
5400 * trace through its heap and call PersistentBase::RegisterExternalReference on 5400 * trace through its heap and call PersistentBase::RegisterExternalReference on
5401 * each js object reachable from any of the given wrappers. 5401 * each js object reachable from any of the given wrappers.
5402 * 5402 *
5403 * Before the first call to the TraceWrappersFrom function TracePrologue will be 5403 * Before the first call to the TraceWrappersFrom function TracePrologue will be
5404 * called. When the garbage collection cycle is finished, TraceEpilogue will be 5404 * called. When the garbage collection cycle is finished, TraceEpilogue will be
5405 * called. 5405 * called.
5406 */ 5406 */
5407 class EmbedderHeapTracer { 5407 class V8_EXPORT EmbedderHeapTracer {
5408 public: 5408 public:
5409 /** 5409 /**
5410 * V8 will call this method at the beginning of the gc cycle. 5410 * V8 will call this method at the beginning of the gc cycle.
5411 */ 5411 */
5412 virtual void TracePrologue() = 0; 5412 virtual void TracePrologue() = 0;
5413 /** 5413 /**
5414 * V8 will call this method with internal fields of a potential wrappers. 5414 * V8 will call this method with internal fields of a potential wrappers.
5415 * Embedder is expected to trace its heap (synchronously) and call 5415 * Embedder is expected to trace its heap (synchronously) and call
5416 * PersistentBase::RegisterExternalReference() on all wrappers reachable from 5416 * PersistentBase::RegisterExternalReference() on all wrappers reachable from
5417 * any of the given wrappers. 5417 * any of the given wrappers.
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8732 */ 8732 */
8733 8733
8734 8734
8735 } // namespace v8 8735 } // namespace v8
8736 8736
8737 8737
8738 #undef TYPE_CHECK 8738 #undef TYPE_CHECK
8739 8739
8740 8740
8741 #endif // INCLUDE_V8_H_ 8741 #endif // INCLUDE_V8_H_
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