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