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// Copyright 2016 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.
#ifndef V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_JOB_H_
#define V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_JOB_H_
#include <memory>
#include "src/base/macros.h"
#include "src/globals.h"
#include "src/handles.h"
#include "testing/gtest/include/gtest/gtest_prod.h"
namespace v8 {
namespace internal {
class CompilerDispatcherTracer;
class CompilationInfo;
class CompilationJob;
class Isolate;
class ParseInfo;
class Parser;
class SharedFunctionInfo;
class String;
class UnicodeCache;
class Utf16CharacterStream;
class Zone;
enum class CompileJobStatus {
kInitial,
kReadyToParse,
kParsed,
kReadyToAnalyse,
kReadyToCompile,
kCompiled,
kFailed,
kDone,
};
class V8_EXPORT_PRIVATE CompilerDispatcherJob {
public:
CompilerDispatcherJob(Isolate* isolate, CompilerDispatcherTracer* tracer,
Handle<SharedFunctionInfo> shared,
size_t max_stack_size);
~CompilerDispatcherJob();
CompileJobStatus status() const { return status_; }
bool can_parse_on_background_thread() const {
return can_parse_on_background_thread_;
}
// Should only be called after kReadyToCompile.
bool can_compile_on_background_thread() const {
DCHECK(compile_job_.get());
return can_compile_on_background_thread_;
}
// Returns true if this CompilerDispatcherJob was created for the given
// function.
bool IsAssociatedWith(Handle<SharedFunctionInfo> shared) const;
// Transition from kInitial to kReadyToParse.
void PrepareToParseOnMainThread();
// Transition from kReadyToParse to kParsed.
void Parse();
// Transition from kParsed to kReadyToAnalyse (or kFailed). Returns false
// when transitioning to kFailed. In that case, an exception is pending.
bool FinalizeParsingOnMainThread();
// Transition from kReadyToAnalyse to kReadyToCompile (or kFailed). Returns
// false when transitioning to kFailed. In that case, an exception is pending.
bool PrepareToCompileOnMainThread();
// Transition from kReadyToCompile to kCompiled.
void Compile();
// Transition from kCompiled to kDone (or kFailed). Returns false when
// transitioning to kFailed. In that case, an exception is pending.
bool FinalizeCompilingOnMainThread();
// Transition from any state to kInitial and free all resources.
void ResetOnMainThread();
// Estimate how long the next step will take using the tracer.
double EstimateRuntimeOfNextStepInMs() const;
private:
FRIEND_TEST(CompilerDispatcherJobTest, ScopeChain);
CompileJobStatus status_ = CompileJobStatus::kInitial;
Isolate* isolate_;
CompilerDispatcherTracer* tracer_;
Handle<SharedFunctionInfo> shared_; // Global handle.
Handle<String> source_; // Global handle.
size_t max_stack_size_;
// Members required for parsing.
std::unique_ptr<UnicodeCache> unicode_cache_;
std::unique_ptr<Zone> zone_;
std::unique_ptr<Utf16CharacterStream> character_stream_;
std::unique_ptr<ParseInfo> parse_info_;
std::unique_ptr<Parser> parser_;
std::unique_ptr<DeferredHandles> handles_from_parsing_;
// Members required for compiling.
std::unique_ptr<CompilationInfo> compile_info_;
std::unique_ptr<CompilationJob> compile_job_;
bool can_parse_on_background_thread_;
bool can_compile_on_background_thread_;
DISALLOW_COPY_AND_ASSIGN(CompilerDispatcherJob);
};
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_JOB_H_