Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 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 |