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. 4 5 #include "src/background-parsing-task.h" 6 7 namespace v8 { 8 namespace internal { 9 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(); 19 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); 26 source->allow_lazy = 27 !i::Compiler::DebuggerWantsEagerCompilation(source->info.get()); 28 source->hash_seed = isolate->heap()->HashSeed(); 29 } 30 31 32 void BackgroundParsingTask::Run() { 33 DisallowHeapAllocation no_allocation; 34 DisallowHandleAllocation no_handles; 35 DisallowHandleDereference no_deref; 36 37 ScriptData* script_data = NULL; 38 if (options_ == ScriptCompiler::kProduceParserCache || 39 options_ == ScriptCompiler::kProduceCodeCache) { 40 source_->info->SetCachedData(&script_data, options_); 41 } 42 43 uintptr_t limit = reinterpret_cast<uintptr_t>(&limit) - stack_size_ * KB; 44 Parser::ParseInfo parse_info = {limit, source_->hash_seed, 45 &source_->unicode_cache}; 46 47 // Parser needs to stay alive for finalizing the parsing on the main 48 // thread. Passing &parse_info is OK because Parser doesn't store it. 49 source_->parser.Reset(new Parser(source_->info.get(), &parse_info)); 50 source_->parser->set_allow_lazy(source_->allow_lazy); 51 source_->parser->ParseOnBackground(); 52 53 if (script_data != NULL) { 54 source_->cached_data.Reset(new ScriptCompiler::CachedData( 55 script_data->data(), script_data->length(), 56 ScriptCompiler::CachedData::BufferOwned)); 57 script_data->ReleaseDataOwnership(); 58 delete script_data; 59 } 60 } 61 } 62 } // namespace v8::internal 63
