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/*
* Copyright (C) 2009, 2010, 2013-2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ArityCheckMode.h"
#include "CallData.h"
#include "CodeBlockHash.h"
#include "CodeSpecializationKind.h"
#include "CompilationResult.h"
#include "ExecutableInfo.h"
#include "HandlerInfo.h"
#include "InferredValue.h"
#include "JITCode.h"
#include "JSGlobalObject.h"
#include "SourceCode.h"
#include "TypeSet.h"
#include "UnlinkedCodeBlock.h"
#include "UnlinkedFunctionExecutable.h"
namespace JSC {
class CodeBlock;
class EvalCodeBlock;
class FunctionCodeBlock;
class JSScope;
class JSWebAssemblyModule;
class LLIntOffsetsExtractor;
class ModuleProgramCodeBlock;
class ProgramCodeBlock;
enum CompilationKind { FirstCompilation, OptimizingCompilation };
inline bool isCall(CodeSpecializationKind kind)
{
if (kind == CodeForCall)
return true;
ASSERT(kind == CodeForConstruct);
return false;
}
class ExecutableBase : public JSCell {
friend class JIT;
protected:
static const int NUM_PARAMETERS_IS_HOST = 0;
static const int NUM_PARAMETERS_NOT_COMPILED = -1;
ExecutableBase(VM& vm, Structure* structure, int numParameters, Intrinsic intrinsic)
: JSCell(vm, structure)
, m_numParametersForCall(numParameters)
, m_numParametersForConstruct(numParameters)
, m_intrinsic(intrinsic)
{
}
void finishCreation(VM& vm)
{
Base::finishCreation(vm);
}
public:
typedef JSCell Base;
static const unsigned StructureFlags = Base::StructureFlags;
static const bool needsDestruction = true;
static void destroy(JSCell*);
CodeBlockHash hashFor(CodeSpecializationKind) const;
bool isEvalExecutable() const
{
return type() == EvalExecutableType;
}
bool isFunctionExecutable() const
{
return type() == FunctionExecutableType;
}
bool isProgramExecutable() const
{
return type() == ProgramExecutableType;
}
bool isModuleProgramExecutable()
{
return type() == ModuleProgramExecutableType;
}
bool isHostFunction() const
{
ASSERT((m_numParametersForCall == NUM_PARAMETERS_IS_HOST) == (m_numParametersForConstruct == NUM_PARAMETERS_IS_HOST));
return m_numParametersForCall == NUM_PARAMETERS_IS_HOST;
}
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto) { return Structure::create(vm, globalObject, proto, TypeInfo(CellType, StructureFlags), info()); }
void clearCode();
DECLARE_EXPORT_INFO;
protected:
int m_numParametersForCall;
int m_numParametersForConstruct;
public:
Ref<JITCode> generatedJITCodeForCall()
{
ASSERT(m_jitCodeForCall);
return *m_jitCodeForCall;
}
Ref<JITCode> generatedJITCodeForConstruct()
{
ASSERT(m_jitCodeForConstruct);
return *m_jitCodeForConstruct;
}
Ref<JITCode> generatedJITCodeFor(CodeSpecializationKind kind)
{
if (kind == CodeForCall)
return generatedJITCodeForCall();
ASSERT(kind == CodeForConstruct);
return generatedJITCodeForConstruct();
}
MacroAssemblerCodePtr entrypointFor(CodeSpecializationKind kind, ArityCheckMode arity)
{
// Check if we have a cached result. We only have it for arity check because we use the
// no-arity entrypoint in non-virtual calls, which will "cache" this value directly in
// machine code.
if (arity == MustCheckArity) {
switch (kind) {
case CodeForCall:
if (MacroAssemblerCodePtr result = m_jitCodeForCallWithArityCheck)
return result;
break;
case CodeForConstruct:
if (MacroAssemblerCodePtr result = m_jitCodeForConstructWithArityCheck)
return result;
break;
}
}
MacroAssemblerCodePtr result =
generatedJITCodeFor(kind)->addressForCall(arity);
if (arity == MustCheckArity) {
// Cache the result; this is necessary for the JIT's virtual call optimizations.
switch (kind) {
case CodeForCall:
m_jitCodeForCallWithArityCheck = result;
break;
case CodeForConstruct:
m_jitCodeForConstructWithArityCheck = result;
break;
}
}
return result;
}
static ptrdiff_t offsetOfJITCodeWithArityCheckFor(
CodeSpecializationKind kind)
{
switch (kind) {
case CodeForCall:
return OBJECT_OFFSETOF(ExecutableBase, m_jitCodeForCallWithArityCheck);
case CodeForConstruct:
return OBJECT_OFFSETOF(ExecutableBase, m_jitCodeForConstructWithArityCheck);
}
RELEASE_ASSERT_NOT_REACHED();
return 0;
}
static ptrdiff_t offsetOfNumParametersFor(CodeSpecializationKind kind)
{
if (kind == CodeForCall)
return OBJECT_OFFSETOF(ExecutableBase, m_numParametersForCall);
ASSERT(kind == CodeForConstruct);
return OBJECT_OFFSETOF(ExecutableBase, m_numParametersForConstruct);
}
bool hasJITCodeForCall() const
{
return m_numParametersForCall >= 0;
}
bool hasJITCodeForConstruct() const
{
return m_numParametersForConstruct >= 0;
}
bool hasJITCodeFor(CodeSpecializationKind kind) const
{
if (kind == CodeForCall)
return hasJITCodeForCall();
ASSERT(kind == CodeForConstruct);
return hasJITCodeForConstruct();
}
// Intrinsics are only for calls, currently.
Intrinsic intrinsic() const { return m_intrinsic; }
Intrinsic intrinsicFor(CodeSpecializationKind kind) const
{
if (isCall(kind))
return intrinsic();
return NoIntrinsic;
}
void dump(PrintStream&) const;
protected:
Intrinsic m_intrinsic;
RefPtr<JITCode> m_jitCodeForCall;
RefPtr<JITCode> m_jitCodeForConstruct;
MacroAssemblerCodePtr m_jitCodeForCallWithArityCheck;
MacroAssemblerCodePtr m_jitCodeForConstructWithArityCheck;
};
} // namespace JSC
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