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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 | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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| 103 , m_treeBuilderSimulator(config->options) | 103 , m_treeBuilderSimulator(config->options) |
| 104 , m_options(config->options) | 104 , m_options(config->options) |
| 105 , m_outstandingTokenLimit(config->outstandingTokenLimit) | 105 , m_outstandingTokenLimit(config->outstandingTokenLimit) |
| 106 , m_parser(config->parser) | 106 , m_parser(config->parser) |
| 107 , m_pendingTokens(wrapUnique(new CompactHTMLTokenStream)) | 107 , m_pendingTokens(wrapUnique(new CompactHTMLTokenStream)) |
| 108 , m_pendingTokenLimit(config->pendingTokenLimit) | 108 , m_pendingTokenLimit(config->pendingTokenLimit) |
| 109 , m_xssAuditor(std::move(config->xssAuditor)) | 109 , m_xssAuditor(std::move(config->xssAuditor)) |
| 110 , m_preloadScanner(wrapUnique(new TokenPreloadScanner(documentURL, std::move
(cachedDocumentParameters), mediaValuesCachedData))) | 110 , m_preloadScanner(wrapUnique(new TokenPreloadScanner(documentURL, std::move
(cachedDocumentParameters), mediaValuesCachedData))) |
| 111 , m_decoder(std::move(config->decoder)) | 111 , m_decoder(std::move(config->decoder)) |
| 112 , m_loadingTaskRunner(std::move(loadingTaskRunner)) | 112 , m_loadingTaskRunner(std::move(loadingTaskRunner)) |
| 113 , m_parsedChunkQueue(config->parsedChunkQueue.release()) | 113 , m_tokenizedChunkQueue(config->tokenizedChunkQueue.release()) |
| 114 , m_startingScript(false) | 114 , m_startingScript(false) |
| 115 , m_lastBytesReceivedTime(0.0) | 115 , m_lastBytesReceivedTime(0.0) |
| 116 { | 116 { |
| 117 ASSERT(m_outstandingTokenLimit > 0); | 117 ASSERT(m_outstandingTokenLimit > 0); |
| 118 ASSERT(m_pendingTokenLimit > 0); | 118 ASSERT(m_pendingTokenLimit > 0); |
| 119 ASSERT(m_outstandingTokenLimit >= m_pendingTokenLimit); | 119 ASSERT(m_outstandingTokenLimit >= m_pendingTokenLimit); |
| 120 } | 120 } |
| 121 | 121 |
| 122 BackgroundHTMLParser::~BackgroundHTMLParser() | 122 BackgroundHTMLParser::~BackgroundHTMLParser() |
| 123 { | 123 { |
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| 170 | 170 |
| 171 void BackgroundHTMLParser::resumeFrom(std::unique_ptr<Checkpoint> checkpoint) | 171 void BackgroundHTMLParser::resumeFrom(std::unique_ptr<Checkpoint> checkpoint) |
| 172 { | 172 { |
| 173 m_parser = checkpoint->parser; | 173 m_parser = checkpoint->parser; |
| 174 m_token = std::move(checkpoint->token); | 174 m_token = std::move(checkpoint->token); |
| 175 m_tokenizer = std::move(checkpoint->tokenizer); | 175 m_tokenizer = std::move(checkpoint->tokenizer); |
| 176 m_treeBuilderSimulator.setState(checkpoint->treeBuilderState); | 176 m_treeBuilderSimulator.setState(checkpoint->treeBuilderState); |
| 177 m_input.rewindTo(checkpoint->inputCheckpoint, checkpoint->unparsedInput); | 177 m_input.rewindTo(checkpoint->inputCheckpoint, checkpoint->unparsedInput); |
| 178 m_preloadScanner->rewindTo(checkpoint->preloadScannerCheckpoint); | 178 m_preloadScanner->rewindTo(checkpoint->preloadScannerCheckpoint); |
| 179 m_startingScript = false; | 179 m_startingScript = false; |
| 180 m_parsedChunkQueue->clear(); | 180 m_tokenizedChunkQueue->clear(); |
| 181 m_lastBytesReceivedTime = monotonicallyIncreasingTimeMS(); | 181 m_lastBytesReceivedTime = monotonicallyIncreasingTimeMS(); |
| 182 pumpTokenizer(); | 182 pumpTokenizer(); |
| 183 } | 183 } |
| 184 | 184 |
| 185 void BackgroundHTMLParser::startedChunkWithCheckpoint(HTMLInputCheckpoint inputC
heckpoint) | 185 void BackgroundHTMLParser::startedChunkWithCheckpoint(HTMLInputCheckpoint inputC
heckpoint) |
| 186 { | 186 { |
| 187 // Note, we should not have to worry about the index being invalid | 187 // Note, we should not have to worry about the index being invalid |
| 188 // as messages from the main thread will be processed in FIFO order. | 188 // as messages from the main thread will be processed in FIFO order. |
| 189 m_input.invalidateCheckpointsBefore(inputCheckpoint); | 189 m_input.invalidateCheckpointsBefore(inputCheckpoint); |
| 190 pumpTokenizer(); | 190 pumpTokenizer(); |
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| 282 if (m_pendingTokens->isEmpty()) | 282 if (m_pendingTokens->isEmpty()) |
| 283 return; | 283 return; |
| 284 | 284 |
| 285 #if ENABLE(ASSERT) | 285 #if ENABLE(ASSERT) |
| 286 checkThatTokensAreSafeToSendToAnotherThread(m_pendingTokens.get()); | 286 checkThatTokensAreSafeToSendToAnotherThread(m_pendingTokens.get()); |
| 287 checkThatPreloadsAreSafeToSendToAnotherThread(m_pendingPreloads); | 287 checkThatPreloadsAreSafeToSendToAnotherThread(m_pendingPreloads); |
| 288 checkThatXSSInfosAreSafeToSendToAnotherThread(m_pendingXSSInfos); | 288 checkThatXSSInfosAreSafeToSendToAnotherThread(m_pendingXSSInfos); |
| 289 #endif | 289 #endif |
| 290 | 290 |
| 291 double chunkStartTime = monotonicallyIncreasingTimeMS(); | 291 double chunkStartTime = monotonicallyIncreasingTimeMS(); |
| 292 std::unique_ptr<HTMLDocumentParser::ParsedChunk> chunk = wrapUnique(new HTML
DocumentParser::ParsedChunk); | 292 std::unique_ptr<HTMLDocumentParser::TokenizedChunk> chunk = wrapUnique(new H
TMLDocumentParser::TokenizedChunk); |
| 293 TRACE_EVENT_WITH_FLOW0("blink,loading", "BackgroundHTMLParser::sendTokensToM
ainThread", chunk.get(), TRACE_EVENT_FLAG_FLOW_OUT); | 293 TRACE_EVENT_WITH_FLOW0("blink,loading", "BackgroundHTMLParser::sendTokensToM
ainThread", chunk.get(), TRACE_EVENT_FLAG_FLOW_OUT); |
| 294 | 294 |
| 295 if (!m_pendingPreloads.isEmpty()) { | 295 if (!m_pendingPreloads.isEmpty()) { |
| 296 double delay = monotonicallyIncreasingTimeMS() - m_lastBytesReceivedTime
; | 296 double delay = monotonicallyIncreasingTimeMS() - m_lastBytesReceivedTime
; |
| 297 DEFINE_STATIC_LOCAL(CustomCountHistogram, preloadTokenizeDelay, ("Parser
.PreloadTokenizeDelay", 1, 10000, 50)); | 297 DEFINE_STATIC_LOCAL(CustomCountHistogram, preloadTokenizeDelay, ("Parser
.PreloadTokenizeDelay", 1, 10000, 50)); |
| 298 preloadTokenizeDelay.count(delay); | 298 preloadTokenizeDelay.count(delay); |
| 299 } | 299 } |
| 300 | 300 |
| 301 chunk->preloads.swap(m_pendingPreloads); | 301 chunk->preloads.swap(m_pendingPreloads); |
| 302 if (m_viewportDescription.set) | 302 if (m_viewportDescription.set) |
| 303 chunk->viewport = m_viewportDescription; | 303 chunk->viewport = m_viewportDescription; |
| 304 chunk->xssInfos.swap(m_pendingXSSInfos); | 304 chunk->xssInfos.swap(m_pendingXSSInfos); |
| 305 chunk->tokenizerState = m_tokenizer->getState(); | 305 chunk->tokenizerState = m_tokenizer->getState(); |
| 306 chunk->treeBuilderState = m_treeBuilderSimulator.state(); | 306 chunk->treeBuilderState = m_treeBuilderSimulator.state(); |
| 307 chunk->inputCheckpoint = m_input.createCheckpoint(m_pendingTokens->size()); | 307 chunk->inputCheckpoint = m_input.createCheckpoint(m_pendingTokens->size()); |
| 308 chunk->preloadScannerCheckpoint = m_preloadScanner->createCheckpoint(); | 308 chunk->preloadScannerCheckpoint = m_preloadScanner->createCheckpoint(); |
| 309 chunk->tokens = std::move(m_pendingTokens); | 309 chunk->tokens = std::move(m_pendingTokens); |
| 310 chunk->startingScript = m_startingScript; | 310 chunk->startingScript = m_startingScript; |
| 311 chunk->likelyDocumentWriteScriptIndices.swap(m_likelyDocumentWriteScriptIndi
ces); | 311 chunk->likelyDocumentWriteScriptIndices.swap(m_likelyDocumentWriteScriptIndi
ces); |
| 312 m_startingScript = false; | 312 m_startingScript = false; |
| 313 | 313 |
| 314 bool isEmpty = m_parsedChunkQueue->enqueue(std::move(chunk)); | 314 bool isEmpty = m_tokenizedChunkQueue->enqueue(std::move(chunk)); |
| 315 | 315 |
| 316 DEFINE_STATIC_LOCAL(CustomCountHistogram, chunkEnqueueTime, ("Parser.ChunkEn
queueTime", 1, 10000, 50)); | 316 DEFINE_STATIC_LOCAL(CustomCountHistogram, chunkEnqueueTime, ("Parser.ChunkEn
queueTime", 1, 10000, 50)); |
| 317 chunkEnqueueTime.count(monotonicallyIncreasingTimeMS() - chunkStartTime); | 317 chunkEnqueueTime.count(monotonicallyIncreasingTimeMS() - chunkStartTime); |
| 318 | 318 |
| 319 if (isEmpty) { | 319 if (isEmpty) { |
| 320 runOnMainThread(&HTMLDocumentParser::notifyPendingParsedChunks, m_parser
); | 320 runOnMainThread(&HTMLDocumentParser::notifyPendingTokenizedChunks, m_par
ser); |
| 321 } | 321 } |
| 322 | 322 |
| 323 m_pendingTokens = wrapUnique(new CompactHTMLTokenStream); | 323 m_pendingTokens = wrapUnique(new CompactHTMLTokenStream); |
| 324 } | 324 } |
| 325 | 325 |
| 326 // If the background parser is already running on the main thread, then it is | 326 // If the background parser is already running on the main thread, then it is |
| 327 // not necessary to post a task to the main thread to run asynchronously. The | 327 // not necessary to post a task to the main thread to run asynchronously. The |
| 328 // main parser deals with chunking up its own work. | 328 // main parser deals with chunking up its own work. |
| 329 // TODO(csharrison): This is a pretty big hack because we don't actually need a | 329 // TODO(csharrison): This is a pretty big hack because we don't actually need a |
| 330 // CrossThreadClosure in these cases. This is just experimental. | 330 // CrossThreadClosure in these cases. This is just experimental. |
| 331 template <typename FunctionType, typename... Ps> | 331 template <typename FunctionType, typename... Ps> |
| 332 void BackgroundHTMLParser::runOnMainThread(FunctionType function, Ps&&... parame
ters) | 332 void BackgroundHTMLParser::runOnMainThread(FunctionType function, Ps&&... parame
ters) |
| 333 { | 333 { |
| 334 if (isMainThread()) { | 334 if (isMainThread()) { |
| 335 (*WTF::bind(function, std::forward<Ps>(parameters)...))(); | 335 (*WTF::bind(function, std::forward<Ps>(parameters)...))(); |
| 336 } else { | 336 } else { |
| 337 m_loadingTaskRunner->postTask(BLINK_FROM_HERE, crossThreadBind(function,
std::forward<Ps>(parameters)...)); | 337 m_loadingTaskRunner->postTask(BLINK_FROM_HERE, crossThreadBind(function,
std::forward<Ps>(parameters)...)); |
| 338 } | 338 } |
| 339 } | 339 } |
| 340 | 340 |
| 341 } // namespace blink | 341 } // namespace blink |
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