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// Copyright 2018 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_SERIALIZER_FOR_BACKGROUND_COMPILATION_H_
#define V8_COMPILER_SERIALIZER_FOR_BACKGROUND_COMPILATION_H_
#include "src/base/optional.h"
#include "src/handles.h"
#include "src/maybe-handles.h"
#include "src/utils.h"
#include "src/zone/zone-containers.h"
namespace v8 {
namespace internal {
namespace interpreter {
class BytecodeArrayIterator;
} // namespace interpreter
class BytecodeArray;
class FeedbackVector;
class LookupIterator;
class NativeContext;
class ScriptContextTable;
class SharedFunctionInfo;
class SourcePositionTableIterator;
class Zone;
namespace compiler {
#define CLEAR_ENVIRONMENT_LIST(V) \
V(Abort) \
V(CallRuntime) \
V(CallRuntimeForPair) \
V(CreateBlockContext) \
V(CreateFunctionContext) \
V(CreateEvalContext) \
V(Debugger) \
V(PushContext) \
V(PopContext) \
V(ResumeGenerator) \
V(ReThrow) \
V(StaContextSlot) \
V(StaCurrentContextSlot) \
V(SuspendGenerator) \
V(SwitchOnGeneratorState) \
V(Throw)
#define CLEAR_ACCUMULATOR_LIST(V) \
V(CreateEmptyObjectLiteral) \
V(CreateMappedArguments) \
V(CreateRestParameter) \
V(CreateUnmappedArguments) \
V(LdaContextSlot) \
V(LdaCurrentContextSlot) \
V(LdaGlobal) \
V(LdaGlobalInsideTypeof) \
V(LdaImmutableContextSlot) \
V(LdaImmutableCurrentContextSlot) \
V(LdaNamedProperty) \
V(LdaNamedPropertyNoFeedback)
#define UNCONDITIONAL_JUMPS_LIST(V) \
V(Jump) \
V(JumpConstant) \
V(JumpLoop)
#define CONDITIONAL_JUMPS_LIST(V) \
V(JumpIfFalse) \
V(JumpIfFalseConstant) \
V(JumpIfJSReceiver) \
V(JumpIfJSReceiverConstant) \
V(JumpIfNotNull) \
V(JumpIfNotNullConstant) \
V(JumpIfNotUndefined) \
V(JumpIfNotUndefinedConstant) \
V(JumpIfNull) \
V(JumpIfNullConstant) \
V(JumpIfToBooleanTrueConstant) \
V(JumpIfToBooleanFalseConstant) \
V(JumpIfToBooleanTrue) \
V(JumpIfToBooleanFalse) \
V(JumpIfTrue) \
V(JumpIfTrueConstant) \
V(JumpIfUndefined) \
V(JumpIfUndefinedConstant)
#define INGORED_BYTECODE_LIST(V) \
V(TestEqual) \
V(TestEqualStrict) \
V(TestLessThan) \
V(TestGreaterThan) \
V(TestLessThanOrEqual) \
V(TestGreaterThanOrEqual) \
V(TestReferenceEqual) \
V(TestInstanceOf) \
V(TestIn) \
V(TestUndetectable) \
V(TestNull) \
V(TestUndefined) \
V(TestTypeOf) \
V(ThrowReferenceErrorIfHole) \
V(ThrowSuperNotCalledIfHole) \
V(ThrowSuperAlreadyCalledIfNotHole)
#define SUPPORTED_BYTECODE_LIST(V) \
V(CallAnyReceiver) \
V(CallNoFeedback) \
V(CallProperty) \
V(CallProperty0) \
V(CallProperty1) \
V(CallProperty2) \
V(CallUndefinedReceiver) \
V(CallUndefinedReceiver0) \
V(CallUndefinedReceiver1) \
V(CallUndefinedReceiver2) \
V(CallWithSpread) \
V(Construct) \
V(ConstructWithSpread) \
V(CreateClosure) \
V(ExtraWide) \
V(Illegal) \
V(LdaConstant) \
V(LdaKeyedProperty) \
V(LdaNull) \
V(Ldar) \
V(LdaSmi) \
V(LdaUndefined) \
V(LdaZero) \
V(Mov) \
V(Return) \
V(StackCheck) \
V(StaInArrayLiteral) \
V(StaKeyedProperty) \
V(Star) \
V(Wide) \
CLEAR_ENVIRONMENT_LIST(V) \
CLEAR_ACCUMULATOR_LIST(V) \
CONDITIONAL_JUMPS_LIST(V) \
UNCONDITIONAL_JUMPS_LIST(V) \
INGORED_BYTECODE_LIST(V)
class JSHeapBroker;
template <typename T>
struct HandleComparator {
bool operator()(const Handle<T>& lhs, const Handle<T>& rhs) const {
return lhs.address() < rhs.address();
}
};
struct FunctionBlueprint {
Handle<SharedFunctionInfo> shared;
Handle<FeedbackVector> feedback_vector;
bool operator<(const FunctionBlueprint& other) const {
// A feedback vector is never used for more than one SFI, so it can
// be used for strict ordering of blueprints.
DCHECK_IMPLIES(feedback_vector.equals(other.feedback_vector),
shared.equals(other.shared));
return HandleComparator<FeedbackVector>()(feedback_vector,
other.feedback_vector);
}
};
class CompilationSubject {
public:
explicit CompilationSubject(FunctionBlueprint blueprint)
: blueprint_(blueprint) {}
CompilationSubject(Handle<JSFunction> closure, Isolate* isolate);
FunctionBlueprint blueprint() const { return blueprint_; }
MaybeHandle<JSFunction> closure() const { return closure_; }
private:
FunctionBlueprint blueprint_;
MaybeHandle<JSFunction> closure_;
};
typedef ZoneSet<Handle<Object>, HandleComparator<Object>> ConstantsSet;
typedef ZoneSet<Handle<Map>, HandleComparator<Map>> MapsSet;
typedef ZoneSet<FunctionBlueprint> BlueprintsSet;
class Hints {
public:
explicit Hints(Zone* zone);
const ConstantsSet& constants() const;
const MapsSet& maps() const;
const BlueprintsSet& function_blueprints() const;
void AddConstant(Handle<Object> constant);
void AddMap(Handle<Map> map);
void AddFunctionBlueprint(FunctionBlueprint function_blueprint);
void Add(const Hints& other);
void Clear();
bool IsEmpty() const;
private:
ConstantsSet constants_;
MapsSet maps_;
BlueprintsSet function_blueprints_;
};
typedef ZoneVector<Hints> HintsVector;
// The SerializerForBackgroundCompilation makes sure that the relevant function
// data such as bytecode, SharedFunctionInfo and FeedbackVector, used by later
// optimizations in the compiler, is copied to the heap broker.
class SerializerForBackgroundCompilation {
public:
SerializerForBackgroundCompilation(JSHeapBroker* broker, Zone* zone,
Handle<JSFunction> closure);
Hints Run(); // NOTE: Returns empty for an already-serialized function.
class Environment;
private:
SerializerForBackgroundCompilation(JSHeapBroker* broker, Zone* zone,
CompilationSubject function,
base::Optional<Hints> new_target,
const HintsVector& arguments);
void TraverseBytecode();
#define DECLARE_VISIT_BYTECODE(name, ...) \
void Visit##name(interpreter::BytecodeArrayIterator* iterator);
SUPPORTED_BYTECODE_LIST(DECLARE_VISIT_BYTECODE)
#undef DECLARE_VISIT_BYTECODE
void ProcessCallOrConstruct(Hints callee, base::Optional<Hints> new_target,
const HintsVector& arguments, FeedbackSlot slot,
bool with_spread = false);
void ProcessCallVarArgs(interpreter::BytecodeArrayIterator* iterator,
ConvertReceiverMode receiver_mode,
bool with_spread = false);
void ProcessJump(interpreter::BytecodeArrayIterator* iterator);
void MergeAfterJump(interpreter::BytecodeArrayIterator* iterator);
Hints RunChildSerializer(CompilationSubject function,
base::Optional<Hints> new_target,
const HintsVector& arguments, bool with_spread);
void ProcessFeedbackForKeyedPropertyAccess(
interpreter::BytecodeArrayIterator* iterator);
JSHeapBroker* broker() const { return broker_; }
Zone* zone() const { return zone_; }
Environment* environment() const { return environment_; }
JSHeapBroker* const broker_;
Zone* const zone_;
Environment* const environment_;
ZoneUnorderedMap<int, Environment*> stashed_environments_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_SERIALIZER_FOR_BACKGROUND_COMPILATION_H_
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