#ifndef Interpreter_h
#define Interpreter_h
#include "ArgList.h"
#include "JSCJSValue.h"
#include "JSCell.h"
#include "JSFunction.h"
#include "JSObject.h"
#include "JSStack.h"
#include "LLIntData.h"
#include "Opcode.h"
#include "SourceProvider.h"
#include <wtf/HashMap.h>
#include <wtf/text/StringBuilder.h>
namespace JSC {
class CodeBlock;
class EvalExecutable;
class ExecutableBase;
class FunctionExecutable;
class VM;
class JSGlobalObject;
class LLIntOffsetsExtractor;
class ProgramExecutable;
class Register;
class JSScope;
class SamplingTool;
struct CallFrameClosure;
struct HandlerInfo;
struct Instruction;
struct ProtoCallFrame;
enum DebugHookID {
WillExecuteProgram,
DidExecuteProgram,
DidEnterCallFrame,
DidReachBreakpoint,
WillLeaveCallFrame,
WillExecuteStatement
};
enum StackFrameCodeType {
StackFrameGlobalCode,
StackFrameEvalCode,
StackFrameFunctionCode,
StackFrameNativeCode
};
struct StackFrame {
Strong<JSObject> callee;
StackFrameCodeType codeType;
Strong<ExecutableBase> executable;
Strong<UnlinkedCodeBlock> codeBlock;
RefPtr<SourceProvider> code;
int lineOffset;
unsigned firstLineColumnOffset;
unsigned characterOffset;
unsigned bytecodeOffset;
String sourceURL;
JS_EXPORT_PRIVATE String toString(CallFrame*);
String friendlySourceURL() const
{
String traceLine;
switch (codeType) {
case StackFrameEvalCode:
case StackFrameFunctionCode:
case StackFrameGlobalCode:
if (!sourceURL.isEmpty())
traceLine = sourceURL.impl();
break;
case StackFrameNativeCode:
traceLine = "[native code]";
break;
}
return traceLine.isNull() ? emptyString() : traceLine;
}
String friendlyFunctionName(CallFrame* callFrame) const
{
String traceLine;
JSObject* stackFrameCallee = callee.get();
switch (codeType) {
case StackFrameEvalCode:
traceLine = "eval code";
break;
case StackFrameNativeCode:
if (callee)
traceLine = getCalculatedDisplayName(callFrame, stackFrameCallee).impl();
break;
case StackFrameFunctionCode:
traceLine = getCalculatedDisplayName(callFrame, stackFrameCallee).impl();
break;
case StackFrameGlobalCode:
traceLine = "global code";
break;
}
return traceLine.isNull() ? emptyString() : traceLine;
}
JS_EXPORT_PRIVATE void computeLineAndColumn(unsigned& line, unsigned& column);
private:
void expressionInfo(int& divot, int& startOffset, int& endOffset, unsigned& line, unsigned& column);
};
class ClearExceptionScope {
public:
ClearExceptionScope(VM* vm): m_vm(vm)
{
vm->getExceptionInfo(oldException, oldExceptionStack);
vm->clearException();
}
~ClearExceptionScope()
{
m_vm->setExceptionInfo(oldException, oldExceptionStack);
}
private:
JSC::JSValue oldException;
RefCountedArray<JSC::StackFrame> oldExceptionStack;
VM* m_vm;
};
class TopCallFrameSetter {
public:
TopCallFrameSetter(VM& currentVM, CallFrame* callFrame)
: vm(currentVM)
, oldCallFrame(currentVM.topCallFrame)
{
ASSERT(!callFrame->isVMEntrySentinel());
currentVM.topCallFrame = callFrame;
}
~TopCallFrameSetter()
{
ASSERT(!oldCallFrame->isVMEntrySentinel());
vm.topCallFrame = oldCallFrame;
}
private:
VM& vm;
CallFrame* oldCallFrame;
};
class NativeCallFrameTracer {
public:
ALWAYS_INLINE NativeCallFrameTracer(VM* vm, CallFrame* callFrame)
{
ASSERT(vm);
ASSERT(callFrame);
ASSERT(!callFrame->isVMEntrySentinel());
vm->topCallFrame = callFrame;
}
enum VMEntrySentinelOKTag { VMEntrySentinelOK };
ALWAYS_INLINE NativeCallFrameTracer(VM* vm, CallFrame* callFrame, VMEntrySentinelOKTag)
{
ASSERT(vm);
ASSERT(callFrame);
if (!callFrame->isVMEntrySentinel())
vm->topCallFrame = callFrame;
}
};
class Interpreter {
WTF_MAKE_FAST_ALLOCATED;
friend class CachedCall;
friend class LLIntOffsetsExtractor;
friend class JIT;
friend class VM;
public:
Interpreter(VM &);
~Interpreter();
void initialize(bool canUseJIT);
JSStack& stack() { return m_stack; }
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
}
bool isOpcode(Opcode);
JSValue execute(ProgramExecutable*, 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 execute(EvalExecutable*, CallFrame*, JSValue thisValue, JSScope*);
void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
SamplingTool* sampler() { return m_sampler.get(); }
NEVER_INLINE HandlerInfo* unwind(CallFrame*&, JSValue&);
NEVER_INLINE void debug(CallFrame*, DebugHookID);
JSString* stackTraceAsString(ExecState*, 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*);
void dumpSampleData(ExecState* exec);
void startSampling();
void stopSampling();
JS_EXPORT_PRIVATE void dumpCallFrame(CallFrame*);
private:
enum ExecutionFlag { Normal, InitializeAndReturn };
CallFrameClosure prepareForRepeatCall(FunctionExecutable*, CallFrame*, ProtoCallFrame*, JSFunction*, int argumentCountIncludingThis, JSScope*, JSValue*);
JSValue execute(CallFrameClosure&);
void getStackTrace(Vector<StackFrame>& results, size_t maxStackSize = std::numeric_limits<size_t>::max());
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;
VM& m_vm;
JSStack m_stack;
int m_errorHandlingModeReentry;
#if ENABLE(COMPUTED_GOTO_OPCODES)
Opcode* m_opcodeTable; HashMap<Opcode, OpcodeID> m_opcodeIDTable; #endif
#if !ASSERT_DISABLED
bool m_initialized;
#endif
};
JSValue eval(CallFrame*);
CallFrame* sizeFrameForVarargs(CallFrame*, JSStack*, JSValue, int, uint32_t firstVarArgOffset);
void loadVarargs(CallFrame*, CallFrame*, JSValue, JSValue, uint32_t firstVarArgOffset);
}
#endif // Interpreter_h