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/*
* Copyright (C) 2008 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
*/
#ifndef Interpreter_h
#define Interpreter_h
#include "ArgList.h"
#include "FastAllocBase.h"
#include "JSCell.h"
#include "JSValue.h"
#include "JSObject.h"
#include "Opcode.h"
#include "RegisterFile.h"
#include <wtf/HashMap.h>
namespace JSC {
class CodeBlock;
class EvalExecutable;
class FunctionExecutable;
class InternalFunction;
class JSFunction;
class JSGlobalObject;
class ProgramExecutable;
class Register;
class ScopeChainNode;
class SamplingTool;
struct CallFrameClosure;
struct HandlerInfo;
struct Instruction;
enum DebugHookID {
WillExecuteProgram,
DidExecuteProgram,
DidEnterCallFrame,
DidReachBreakpoint,
WillLeaveCallFrame,
WillExecuteStatement
};
enum { MaxMainThreadReentryDepth = 256, MaxSecondaryThreadReentryDepth = 32 };
class Interpreter : public FastAllocBase {
friend class JIT;
friend class CachedCall;
public:
Interpreter();
RegisterFile& registerFile() { return m_registerFile; }
Opcode getOpcode(OpcodeID id)
{
#if HAVE(COMPUTED_GOTO)
return m_opcodeTable[id];
#else
return id;
#endif
}
OpcodeID getOpcodeID(Opcode opcode)
{
#if HAVE(COMPUTED_GOTO)
ASSERT(isOpcode(opcode));
return m_opcodeIDTable.get(opcode);
#else
return opcode;
#endif
}
bool isOpcode(Opcode);
JSValue execute(ProgramExecutable*, CallFrame*, ScopeChainNode*, JSObject* thisObj, JSValue* exception);
JSValue execute(FunctionExecutable*, CallFrame*, JSFunction*, JSObject* thisObj, const ArgList& args, ScopeChainNode*, JSValue* exception);
JSValue execute(EvalExecutable* evalNode, CallFrame* exec, JSObject* thisObj, ScopeChainNode* scopeChain, JSValue* exception);
JSValue retrieveArguments(CallFrame*, JSFunction*) const;
JSValue retrieveCaller(CallFrame*, InternalFunction*) const;
void retrieveLastCaller(CallFrame*, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue& function) const;
void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
SamplingTool* sampler() { return m_sampler.get(); }
NEVER_INLINE JSValue callEval(CallFrame*, RegisterFile*, Register* argv, int argc, int registerOffset, JSValue& exceptionValue);
NEVER_INLINE HandlerInfo* throwException(CallFrame*&, JSValue&, unsigned bytecodeOffset, bool);
NEVER_INLINE void debug(CallFrame*, DebugHookID, int firstLine, int lastLine);
void dumpSampleData(ExecState* exec);
void startSampling();
void stopSampling();
private:
enum ExecutionFlag { Normal, InitializeAndReturn };
CallFrameClosure prepareForRepeatCall(FunctionExecutable*, CallFrame*, JSFunction*, int argCount, ScopeChainNode*, JSValue* exception);
void endRepeatCall(CallFrameClosure&);
JSValue execute(CallFrameClosure&, JSValue* exception);
JSValue execute(EvalExecutable*, CallFrame*, JSObject* thisObject, int globalRegisterOffset, ScopeChainNode*, JSValue* exception);
#if USE(INTERPRETER)
NEVER_INLINE bool resolve(CallFrame*, Instruction*, JSValue& exceptionValue);
NEVER_INLINE bool resolveSkip(CallFrame*, Instruction*, JSValue& exceptionValue);
NEVER_INLINE bool resolveGlobal(CallFrame*, Instruction*, JSValue& exceptionValue);
NEVER_INLINE void resolveBase(CallFrame*, Instruction* vPC);
NEVER_INLINE bool resolveBaseAndProperty(CallFrame*, Instruction*, JSValue& exceptionValue);
NEVER_INLINE ScopeChainNode* createExceptionScope(CallFrame*, const Instruction* vPC);
void tryCacheGetByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const Identifier& propertyName, const PropertySlot&);
void uncacheGetByID(CodeBlock*, Instruction* vPC);
void tryCachePutByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const PutPropertySlot&);
void uncachePutByID(CodeBlock*, Instruction* vPC);
#endif
NEVER_INLINE bool unwindCallFrame(CallFrame*&, JSValue, unsigned& bytecodeOffset, CodeBlock*&);
static ALWAYS_INLINE CallFrame* slideRegisterWindowForCall(CodeBlock*, RegisterFile*, CallFrame*, size_t registerOffset, int argc);
static CallFrame* findFunctionCallFrame(CallFrame*, InternalFunction*);
JSValue privateExecute(ExecutionFlag, RegisterFile*, CallFrame*, JSValue* exception);
void dumpCallFrame(CallFrame*);
void dumpRegisters(CallFrame*);
bool isCallBytecode(Opcode opcode) { return opcode == getOpcode(op_call) || opcode == getOpcode(op_construct) || opcode == getOpcode(op_call_eval); }
void enableSampler();
int m_sampleEntryDepth;
OwnPtr<SamplingTool> m_sampler;
int m_reentryDepth;
RegisterFile m_registerFile;
#if HAVE(COMPUTED_GOTO)
Opcode m_opcodeTable[numOpcodeIDs]; // Maps OpcodeID => Opcode for compiling
HashMap<Opcode, OpcodeID> m_opcodeIDTable; // Maps Opcode => OpcodeID for decompiling
#endif
};
} // namespace JSC
#endif // Interpreter_h
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