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63 lines
2.4 KiB
63 lines
2.4 KiB
11 years ago
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// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/background-parsing-task.h"
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namespace v8 {
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namespace internal {
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BackgroundParsingTask::BackgroundParsingTask(
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StreamedSource* source, ScriptCompiler::CompileOptions options,
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int stack_size, Isolate* isolate)
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: source_(source), options_(options), stack_size_(stack_size) {
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// Prepare the data for the internalization phase and compilation phase, which
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// will happen in the main thread after parsing.
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source->info.Reset(new i::CompilationInfoWithZone(source->source_stream.get(),
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source->encoding, isolate));
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source->info->MarkAsGlobal();
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// We don't set the context to the CompilationInfo yet, because the background
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// thread cannot do anything with it anyway. We set it just before compilation
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// on the foreground thread.
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DCHECK(options == ScriptCompiler::kProduceParserCache ||
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options == ScriptCompiler::kProduceCodeCache ||
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options == ScriptCompiler::kNoCompileOptions);
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source->allow_lazy =
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!i::Compiler::DebuggerWantsEagerCompilation(source->info.get());
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source->hash_seed = isolate->heap()->HashSeed();
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}
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void BackgroundParsingTask::Run() {
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DisallowHeapAllocation no_allocation;
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DisallowHandleAllocation no_handles;
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DisallowHandleDereference no_deref;
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ScriptData* script_data = NULL;
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if (options_ == ScriptCompiler::kProduceParserCache ||
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options_ == ScriptCompiler::kProduceCodeCache) {
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source_->info->SetCachedData(&script_data, options_);
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}
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uintptr_t limit = reinterpret_cast<uintptr_t>(&limit) - stack_size_ * KB;
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Parser::ParseInfo parse_info = {limit, source_->hash_seed,
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&source_->unicode_cache};
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// Parser needs to stay alive for finalizing the parsing on the main
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// thread. Passing &parse_info is OK because Parser doesn't store it.
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source_->parser.Reset(new Parser(source_->info.get(), &parse_info));
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source_->parser->set_allow_lazy(source_->allow_lazy);
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source_->parser->ParseOnBackground();
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if (script_data != NULL) {
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source_->cached_data.Reset(new ScriptCompiler::CachedData(
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script_data->data(), script_data->length(),
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ScriptCompiler::CachedData::BufferOwned));
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script_data->ReleaseDataOwnership();
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delete script_data;
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}
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}
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}
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} // namespace v8::internal
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