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/*
* Copyright (C) 2008-2017 Apple Inc. All rights reserved.
* Copyright (C) 2012 Research In Motion Limited. 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 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.
*/
#pragma once
#include "ArgList.h"
#include "CatchScope.h"
#include "FrameTracers.h"
#include "JSCJSValue.h"
#include "JSCell.h"
#include "JSObject.h"
#include "Opcode.h"
#include "StackAlignment.h"
#include <wtf/HashMap.h>
#if !ENABLE(JIT)
#include "CLoopStack.h"
#endif
namespace JSC {
class CodeBlock;
class EvalExecutable;
class FunctionExecutable;
class VM;
class JSFunction;
class JSGlobalObject;
class JSModuleEnvironment;
class JSModuleRecord;
class LLIntOffsetsExtractor;
class ProgramExecutable;
class ModuleProgramExecutable;
class Register;
class JSScope;
class StackFrame;
struct CallFrameClosure;
struct HandlerInfo;
struct Instruction;
struct ProtoCallFrame;
struct UnlinkedInstruction;
enum UnwindStart : uint8_t { UnwindFromCurrentFrame, UnwindFromCallerFrame };
enum DebugHookType {
WillExecuteProgram,
DidExecuteProgram,
DidEnterCallFrame,
DidReachBreakpoint,
WillLeaveCallFrame,
WillExecuteStatement,
WillExecuteExpression,
};
enum StackFrameCodeType {
StackFrameGlobalCode,
StackFrameEvalCode,
StackFrameModuleCode,
StackFrameFunctionCode,
StackFrameNativeCode
};
class Interpreter {
WTF_MAKE_FAST_ALLOCATED;
friend class CachedCall;
friend class LLIntOffsetsExtractor;
friend class JIT;
friend class VM;
public:
Interpreter(VM &);
~Interpreter();
void initialize();
#if !ENABLE(JIT)
CLoopStack& cloopStack() { return m_cloopStack; }
#endif
Opcode getOpcode(OpcodeID id)
{
ASSERT(m_initialized);
#if ENABLE(COMPUTED_GOTO_OPCODES)
return m_opcodeTable[id];
#else
return id;
#endif
}
OpcodeID getOpcodeID(Opcode opcode)
{
ASSERT(m_initialized);
#if ENABLE(COMPUTED_GOTO_OPCODES)
ASSERT(isOpcode(opcode));
return m_opcodeIDTable.get(opcode);
#else
return opcode;
#endif
}
OpcodeID getOpcodeID(const Instruction&);
OpcodeID getOpcodeID(const UnlinkedInstruction&);
bool isOpcode(Opcode);
JSValue executeProgram(const SourceCode&, CallFrame*, JSObject* thisObj);
JSValue executeCall(CallFrame*, JSObject* function, CallType, const CallData&, JSValue thisValue, const ArgList&);
JSObject* executeConstruct(CallFrame*, JSObject* function, ConstructType, const ConstructData&, const ArgList&, JSValue newTarget);
JSValue execute(EvalExecutable*, CallFrame*, JSValue thisValue, JSScope*);
JSValue execute(ModuleProgramExecutable*, CallFrame*, JSModuleEnvironment*);
void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
NEVER_INLINE HandlerInfo* unwind(VM&, CallFrame*&, Exception*, UnwindStart);
void notifyDebuggerOfExceptionToBeThrown(CallFrame*, Exception*);
NEVER_INLINE void debug(CallFrame*, DebugHookType);
static JSString* stackTraceAsString(VM&, const Vector<StackFrame>&);
static EncodedJSValue JSC_HOST_CALL constructWithErrorConstructor(ExecState*);
static EncodedJSValue JSC_HOST_CALL callErrorConstructor(ExecState*);
static EncodedJSValue JSC_HOST_CALL constructWithNativeErrorConstructor(ExecState*);
static EncodedJSValue JSC_HOST_CALL callNativeErrorConstructor(ExecState*);
JS_EXPORT_PRIVATE void dumpCallFrame(CallFrame*);
void getStackTrace(Vector<StackFrame>& results, size_t framesToSkip = 0, size_t maxStackSize = std::numeric_limits<size_t>::max());
private:
enum ExecutionFlag { Normal, InitializeAndReturn };
CallFrameClosure prepareForRepeatCall(FunctionExecutable*, CallFrame*, ProtoCallFrame*, JSFunction*, int argumentCountIncludingThis, JSScope*, const ArgList&);
JSValue execute(CallFrameClosure&);
void dumpRegisters(CallFrame*);
bool isCallBytecode(Opcode opcode) { return opcode == getOpcode(op_call) || opcode == getOpcode(op_construct) || opcode == getOpcode(op_call_eval) || opcode == getOpcode(op_tail_call); }
VM& m_vm;
#if !ENABLE(JIT)
CLoopStack m_cloopStack;
#endif
#if ENABLE(COMPUTED_GOTO_OPCODES)
Opcode* m_opcodeTable; // Maps OpcodeID => Opcode for compiling
HashMap<Opcode, OpcodeID> m_opcodeIDTable; // Maps Opcode => OpcodeID for decompiling
#endif
#if !ASSERT_DISABLED
bool m_initialized;
#endif
};
JSValue eval(CallFrame*);
inline CallFrame* calleeFrameForVarargs(CallFrame* callFrame, unsigned numUsedStackSlots, unsigned argumentCountIncludingThis)
{
// We want the new frame to be allocated on a stack aligned offset with a stack
// aligned size. Align the size here.
argumentCountIncludingThis = WTF::roundUpToMultipleOf(
stackAlignmentRegisters(),
argumentCountIncludingThis + CallFrame::headerSizeInRegisters) - CallFrame::headerSizeInRegisters;
// Align the frame offset here.
unsigned paddedCalleeFrameOffset = WTF::roundUpToMultipleOf(
stackAlignmentRegisters(),
numUsedStackSlots + argumentCountIncludingThis + CallFrame::headerSizeInRegisters);
return CallFrame::create(callFrame->registers() - paddedCalleeFrameOffset);
}
unsigned sizeOfVarargs(CallFrame* exec, JSValue arguments, uint32_t firstVarArgOffset);
static const unsigned maxArguments = 0x10000;
unsigned sizeFrameForVarargs(CallFrame* exec, VM&, JSValue arguments, unsigned numUsedStackSlots, uint32_t firstVarArgOffset);
unsigned sizeFrameForForwardArguments(CallFrame* exec, VM&, unsigned numUsedStackSlots);
void loadVarargs(CallFrame* execCaller, VirtualRegister firstElementDest, JSValue source, uint32_t offset, uint32_t length);
void setupVarargsFrame(CallFrame* execCaller, CallFrame* execCallee, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length);
void setupVarargsFrameAndSetThis(CallFrame* execCaller, CallFrame* execCallee, JSValue thisValue, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length);
void setupForwardArgumentsFrame(CallFrame* execCaller, CallFrame* execCallee, uint32_t length);
void setupForwardArgumentsFrameAndSetThis(CallFrame* execCaller, CallFrame* execCallee, JSValue thisValue, uint32_t length);
} // namespace JSC
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