1 // Copyright 2014 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "src/background-parsing-task.h"
10 BackgroundParsingTask::BackgroundParsingTask(
11 StreamedSource* source, ScriptCompiler::CompileOptions options,
12 int stack_size, Isolate* isolate)
13 : source_(source), options_(options), stack_size_(stack_size) {
14 // Prepare the data for the internalization phase and compilation phase, which
15 // will happen in the main thread after parsing.
16 source->info.Reset(new i::CompilationInfoWithZone(source->source_stream.get(),
17 source->encoding, isolate));
18 source->info->MarkAsGlobal();
20 // We don't set the context to the CompilationInfo yet, because the background
21 // thread cannot do anything with it anyway. We set it just before compilation
22 // on the foreground thread.
23 DCHECK(options == ScriptCompiler::kProduceParserCache ||
24 options == ScriptCompiler::kProduceCodeCache ||
25 options == ScriptCompiler::kNoCompileOptions);
27 !i::Compiler::DebuggerWantsEagerCompilation(source->info.get());
29 if (!source->allow_lazy && options_ == ScriptCompiler::kProduceParserCache) {
30 // Producing cached data while parsing eagerly is not supported.
31 options_ = ScriptCompiler::kNoCompileOptions;
33 source->hash_seed = isolate->heap()->HashSeed();
37 void BackgroundParsingTask::Run() {
38 DisallowHeapAllocation no_allocation;
39 DisallowHandleAllocation no_handles;
40 DisallowHandleDereference no_deref;
42 ScriptData* script_data = NULL;
43 if (options_ == ScriptCompiler::kProduceParserCache ||
44 options_ == ScriptCompiler::kProduceCodeCache) {
45 source_->info->SetCachedData(&script_data, options_);
48 uintptr_t stack_limit =
49 reinterpret_cast<uintptr_t>(&stack_limit) - stack_size_ * KB;
51 // Parser needs to stay alive for finalizing the parsing on the main
52 // thread. Passing &parse_info is OK because Parser doesn't store it.
53 source_->parser.Reset(new Parser(source_->info.get(), stack_limit,
55 &source_->unicode_cache));
56 source_->parser->set_allow_lazy(source_->allow_lazy);
57 source_->parser->ParseOnBackground(source_->info.get());
59 if (script_data != NULL) {
60 source_->cached_data.Reset(new ScriptCompiler::CachedData(
61 script_data->data(), script_data->length(),
62 ScriptCompiler::CachedData::BufferOwned));
63 script_data->ReleaseDataOwnership();
68 } // namespace v8::internal