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5414 lines (4630 loc) · 209 KB
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/*
* Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2008 Cameron Zwarich <[email protected]>
*
* 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.
*/
#include "config.h"
#include "Interpreter.h"
#include "Arguments.h"
#include "BatchedTransitionOptimizer.h"
#include "CallFrame.h"
#include "CallFrameClosure.h"
#include "CodeBlock.h"
#include "Heap.h"
#include "Debugger.h"
#include "DebuggerCallFrame.h"
#include "ErrorInstance.h"
#include "EvalCodeCache.h"
#include "ExceptionHelpers.h"
#include "GetterSetter.h"
#include "JSActivation.h"
#include "JSArray.h"
#include "JSBoundFunction.h"
#include "JSNotAnObject.h"
#include "JSPropertyNameIterator.h"
#include "LiteralParser.h"
#include "JSStaticScopeObject.h"
#include "JSString.h"
#include "ObjectPrototype.h"
#include "Operations.h"
#include "Parser.h"
#include "Profiler.h"
#include "RegExpObject.h"
#include "RegExpPrototype.h"
#include "Register.h"
#include "SamplingTool.h"
#include "StrictEvalActivation.h"
#include "StrongInlines.h"
#include "UStringConcatenate.h"
#include <limits.h>
#include <stdio.h>
#include <wtf/Threading.h>
#include <wtf/text/StringBuilder.h>
#if ENABLE(JIT)
#include "JIT.h"
#endif
#define WTF_USE_GCC_COMPUTED_GOTO_WORKAROUND ((ENABLE(COMPUTED_GOTO_CLASSIC_INTERPRETER) || ENABLE(LLINT)) && !defined(__llvm__))
using namespace std;
namespace JSC {
// Returns the depth of the scope chain within a given call frame.
static int depth(CodeBlock* codeBlock, ScopeChainNode* sc)
{
if (!codeBlock->needsFullScopeChain())
return 0;
return sc->localDepth();
}
#if ENABLE(CLASSIC_INTERPRETER)
static NEVER_INLINE JSValue concatenateStrings(ExecState* exec, Register* strings, unsigned count)
{
return jsString(exec, strings, count);
}
NEVER_INLINE bool Interpreter::resolve(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
{
int dst = vPC[1].u.operand;
int property = vPC[2].u.operand;
ScopeChainNode* scopeChain = callFrame->scopeChain();
ScopeChainIterator iter = scopeChain->begin();
ScopeChainIterator end = scopeChain->end();
ASSERT(iter != end);
CodeBlock* codeBlock = callFrame->codeBlock();
Identifier& ident = codeBlock->identifier(property);
do {
JSObject* o = iter->get();
PropertySlot slot(o);
if (o->getPropertySlot(callFrame, ident, slot)) {
JSValue result = slot.getValue(callFrame, ident);
exceptionValue = callFrame->globalData().exception;
if (exceptionValue)
return false;
callFrame->uncheckedR(dst) = JSValue(result);
return true;
}
} while (++iter != end);
exceptionValue = createUndefinedVariableError(callFrame, ident);
return false;
}
NEVER_INLINE bool Interpreter::resolveSkip(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
{
CodeBlock* codeBlock = callFrame->codeBlock();
int dst = vPC[1].u.operand;
int property = vPC[2].u.operand;
int skip = vPC[3].u.operand;
ScopeChainNode* scopeChain = callFrame->scopeChain();
ScopeChainIterator iter = scopeChain->begin();
ScopeChainIterator end = scopeChain->end();
ASSERT(iter != end);
bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
ASSERT(skip || !checkTopLevel);
if (checkTopLevel && skip--) {
if (callFrame->uncheckedR(codeBlock->activationRegister()).jsValue())
++iter;
}
while (skip--) {
++iter;
ASSERT(iter != end);
}
Identifier& ident = codeBlock->identifier(property);
do {
JSObject* o = iter->get();
PropertySlot slot(o);
if (o->getPropertySlot(callFrame, ident, slot)) {
JSValue result = slot.getValue(callFrame, ident);
exceptionValue = callFrame->globalData().exception;
if (exceptionValue)
return false;
ASSERT(result);
callFrame->uncheckedR(dst) = JSValue(result);
return true;
}
} while (++iter != end);
exceptionValue = createUndefinedVariableError(callFrame, ident);
return false;
}
NEVER_INLINE bool Interpreter::resolveGlobal(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
{
int dst = vPC[1].u.operand;
CodeBlock* codeBlock = callFrame->codeBlock();
JSGlobalObject* globalObject = codeBlock->globalObject();
ASSERT(globalObject->isGlobalObject());
int property = vPC[2].u.operand;
Structure* structure = vPC[3].u.structure.get();
int offset = vPC[4].u.operand;
if (structure == globalObject->structure()) {
callFrame->uncheckedR(dst) = JSValue(globalObject->getDirectOffset(offset));
return true;
}
Identifier& ident = codeBlock->identifier(property);
PropertySlot slot(globalObject);
if (globalObject->getPropertySlot(callFrame, ident, slot)) {
JSValue result = slot.getValue(callFrame, ident);
if (slot.isCacheableValue() && !globalObject->structure()->isUncacheableDictionary() && slot.slotBase() == globalObject) {
vPC[3].u.structure.set(callFrame->globalData(), codeBlock->ownerExecutable(), globalObject->structure());
vPC[4] = slot.cachedOffset();
callFrame->uncheckedR(dst) = JSValue(result);
return true;
}
exceptionValue = callFrame->globalData().exception;
if (exceptionValue)
return false;
callFrame->uncheckedR(dst) = JSValue(result);
return true;
}
exceptionValue = createUndefinedVariableError(callFrame, ident);
return false;
}
NEVER_INLINE bool Interpreter::resolveGlobalDynamic(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
{
int dst = vPC[1].u.operand;
CodeBlock* codeBlock = callFrame->codeBlock();
JSGlobalObject* globalObject = codeBlock->globalObject();
ASSERT(globalObject->isGlobalObject());
int property = vPC[2].u.operand;
Structure* structure = vPC[3].u.structure.get();
int offset = vPC[4].u.operand;
int skip = vPC[5].u.operand;
ScopeChainNode* scopeChain = callFrame->scopeChain();
ScopeChainIterator iter = scopeChain->begin();
ScopeChainIterator end = scopeChain->end();
ASSERT(iter != end);
bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
ASSERT(skip || !checkTopLevel);
if (checkTopLevel && skip--) {
if (callFrame->uncheckedR(codeBlock->activationRegister()).jsValue())
++iter;
}
while (skip--) {
JSObject* o = iter->get();
if (o->hasCustomProperties()) {
Identifier& ident = codeBlock->identifier(property);
do {
PropertySlot slot(o);
if (o->getPropertySlot(callFrame, ident, slot)) {
JSValue result = slot.getValue(callFrame, ident);
exceptionValue = callFrame->globalData().exception;
if (exceptionValue)
return false;
ASSERT(result);
callFrame->uncheckedR(dst) = JSValue(result);
return true;
}
if (iter == end)
break;
o = iter->get();
++iter;
} while (true);
exceptionValue = createUndefinedVariableError(callFrame, ident);
return false;
}
++iter;
}
if (structure == globalObject->structure()) {
callFrame->uncheckedR(dst) = JSValue(globalObject->getDirectOffset(offset));
ASSERT(callFrame->uncheckedR(dst).jsValue());
return true;
}
Identifier& ident = codeBlock->identifier(property);
PropertySlot slot(globalObject);
if (globalObject->getPropertySlot(callFrame, ident, slot)) {
JSValue result = slot.getValue(callFrame, ident);
if (slot.isCacheableValue() && !globalObject->structure()->isUncacheableDictionary() && slot.slotBase() == globalObject) {
vPC[3].u.structure.set(callFrame->globalData(), codeBlock->ownerExecutable(), globalObject->structure());
vPC[4] = slot.cachedOffset();
ASSERT(result);
callFrame->uncheckedR(dst) = JSValue(result);
return true;
}
exceptionValue = callFrame->globalData().exception;
if (exceptionValue)
return false;
ASSERT(result);
callFrame->uncheckedR(dst) = JSValue(result);
return true;
}
exceptionValue = createUndefinedVariableError(callFrame, ident);
return false;
}
NEVER_INLINE void Interpreter::resolveBase(CallFrame* callFrame, Instruction* vPC)
{
int dst = vPC[1].u.operand;
int property = vPC[2].u.operand;
bool isStrictPut = vPC[3].u.operand;
Identifier ident = callFrame->codeBlock()->identifier(property);
JSValue result = JSC::resolveBase(callFrame, ident, callFrame->scopeChain(), isStrictPut);
if (result) {
callFrame->uncheckedR(dst) = result;
ASSERT(callFrame->uncheckedR(dst).jsValue());
} else
callFrame->globalData().exception = createErrorForInvalidGlobalAssignment(callFrame, ident.ustring());
}
NEVER_INLINE bool Interpreter::resolveBaseAndProperty(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
{
int baseDst = vPC[1].u.operand;
int propDst = vPC[2].u.operand;
int property = vPC[3].u.operand;
ScopeChainNode* scopeChain = callFrame->scopeChain();
ScopeChainIterator iter = scopeChain->begin();
ScopeChainIterator end = scopeChain->end();
// FIXME: add scopeDepthIsZero optimization
ASSERT(iter != end);
CodeBlock* codeBlock = callFrame->codeBlock();
Identifier& ident = codeBlock->identifier(property);
JSObject* base;
do {
base = iter->get();
PropertySlot slot(base);
if (base->getPropertySlot(callFrame, ident, slot)) {
JSValue result = slot.getValue(callFrame, ident);
exceptionValue = callFrame->globalData().exception;
if (exceptionValue)
return false;
callFrame->uncheckedR(propDst) = JSValue(result);
callFrame->uncheckedR(baseDst) = JSValue(base);
return true;
}
++iter;
} while (iter != end);
exceptionValue = createUndefinedVariableError(callFrame, ident);
return false;
}
NEVER_INLINE bool Interpreter::resolveThisAndProperty(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
{
int thisDst = vPC[1].u.operand;
int propDst = vPC[2].u.operand;
int property = vPC[3].u.operand;
ScopeChainNode* scopeChain = callFrame->scopeChain();
ScopeChainIterator iter = scopeChain->begin();
ScopeChainIterator end = scopeChain->end();
// FIXME: add scopeDepthIsZero optimization
ASSERT(iter != end);
CodeBlock* codeBlock = callFrame->codeBlock();
Identifier& ident = codeBlock->identifier(property);
JSObject* base;
do {
base = iter->get();
++iter;
PropertySlot slot(base);
if (base->getPropertySlot(callFrame, ident, slot)) {
JSValue result = slot.getValue(callFrame, ident);
exceptionValue = callFrame->globalData().exception;
if (exceptionValue)
return false;
callFrame->uncheckedR(propDst) = JSValue(result);
// All entries on the scope chain should be EnvironmentRecords (activations etc),
// other then 'with' object, which are directly referenced from the scope chain,
// and the global object. If we hit either an EnvironmentRecord or a global
// object at the end of the scope chain, this is undefined. If we hit a non-
// EnvironmentRecord within the scope chain, pass the base as the this value.
if (iter == end || base->structure()->typeInfo().isEnvironmentRecord())
callFrame->uncheckedR(thisDst) = jsUndefined();
else
callFrame->uncheckedR(thisDst) = JSValue(base);
return true;
}
} while (iter != end);
exceptionValue = createUndefinedVariableError(callFrame, ident);
return false;
}
#endif // ENABLE(CLASSIC_INTERPRETER)
ALWAYS_INLINE CallFrame* Interpreter::slideRegisterWindowForCall(CodeBlock* newCodeBlock, RegisterFile* registerFile, CallFrame* callFrame, size_t registerOffset, int argumentCountIncludingThis)
{
// This ensures enough space for the worst case scenario of zero arguments passed by the caller.
if (!registerFile->grow(callFrame->registers() + registerOffset + newCodeBlock->numParameters() + newCodeBlock->m_numCalleeRegisters))
return 0;
if (argumentCountIncludingThis >= newCodeBlock->numParameters()) {
Register* newCallFrame = callFrame->registers() + registerOffset;
return CallFrame::create(newCallFrame);
}
// Too few arguments -- copy arguments, then fill in missing arguments with undefined.
size_t delta = newCodeBlock->numParameters() - argumentCountIncludingThis;
CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset + delta);
Register* dst = &newCallFrame->uncheckedR(CallFrame::thisArgumentOffset());
Register* end = dst - argumentCountIncludingThis;
for ( ; dst != end; --dst)
*dst = *(dst - delta);
end -= delta;
for ( ; dst != end; --dst)
*dst = jsUndefined();
return newCallFrame;
}
#if ENABLE(CLASSIC_INTERPRETER)
static NEVER_INLINE bool isInvalidParamForIn(CallFrame* callFrame, JSValue value, JSValue& exceptionData)
{
if (value.isObject())
return false;
exceptionData = createInvalidParamError(callFrame, "in" , value);
return true;
}
static NEVER_INLINE bool isInvalidParamForInstanceOf(CallFrame* callFrame, JSValue value, JSValue& exceptionData)
{
if (value.isObject() && asObject(value)->structure()->typeInfo().implementsHasInstance())
return false;
exceptionData = createInvalidParamError(callFrame, "instanceof" , value);
return true;
}
#endif
JSValue eval(CallFrame* callFrame)
{
if (!callFrame->argumentCount())
return jsUndefined();
JSValue program = callFrame->argument(0);
if (!program.isString())
return program;
TopCallFrameSetter topCallFrame(callFrame->globalData(), callFrame);
UString programSource = asString(program)->value(callFrame);
if (callFrame->hadException())
return JSValue();
CallFrame* callerFrame = callFrame->callerFrame();
CodeBlock* callerCodeBlock = callerFrame->codeBlock();
ScopeChainNode* callerScopeChain = callerFrame->scopeChain();
EvalExecutable* eval = callerCodeBlock->evalCodeCache().tryGet(callerCodeBlock->isStrictMode(), programSource, callerScopeChain);
if (!eval) {
if (!callerCodeBlock->isStrictMode()) {
// FIXME: We can use the preparser in strict mode, we just need additional logic
// to prevent duplicates.
if (programSource.is8Bit()) {
LiteralParser<LChar> preparser(callFrame, programSource.characters8(), programSource.length(), NonStrictJSON);
if (JSValue parsedObject = preparser.tryLiteralParse())
return parsedObject;
} else {
LiteralParser<UChar> preparser(callFrame, programSource.characters16(), programSource.length(), NonStrictJSON);
if (JSValue parsedObject = preparser.tryLiteralParse())
return parsedObject;
}
}
JSValue exceptionValue;
eval = callerCodeBlock->evalCodeCache().getSlow(callFrame, callerCodeBlock->ownerExecutable(), callerCodeBlock->isStrictMode(), programSource, callerScopeChain, exceptionValue);
ASSERT(!eval == exceptionValue);
if (UNLIKELY(!eval))
return throwError(callFrame, exceptionValue);
}
JSValue thisValue = callerFrame->thisValue();
ASSERT(isValidThisObject(thisValue, callFrame));
Interpreter* interpreter = callFrame->globalData().interpreter;
return interpreter->execute(eval, callFrame, thisValue, callerScopeChain, callFrame->registers() - interpreter->registerFile().begin() + 1 + RegisterFile::CallFrameHeaderSize);
}
CallFrame* loadVarargs(CallFrame* callFrame, RegisterFile* registerFile, JSValue thisValue, JSValue arguments, int firstFreeRegister)
{
if (!arguments) { // f.apply(x, arguments), with arguments unmodified.
unsigned argumentCountIncludingThis = callFrame->argumentCountIncludingThis();
CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + firstFreeRegister + argumentCountIncludingThis + RegisterFile::CallFrameHeaderSize);
if (argumentCountIncludingThis > Arguments::MaxArguments + 1 || !registerFile->grow(newCallFrame->registers())) {
callFrame->globalData().exception = createStackOverflowError(callFrame);
return 0;
}
newCallFrame->setArgumentCountIncludingThis(argumentCountIncludingThis);
newCallFrame->setThisValue(thisValue);
for (size_t i = 0; i < callFrame->argumentCount(); ++i)
newCallFrame->setArgument(i, callFrame->argument(i));
return newCallFrame;
}
if (arguments.isUndefinedOrNull()) {
CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + firstFreeRegister + 1 + RegisterFile::CallFrameHeaderSize);
if (!registerFile->grow(newCallFrame->registers())) {
callFrame->globalData().exception = createStackOverflowError(callFrame);
return 0;
}
newCallFrame->setArgumentCountIncludingThis(1);
newCallFrame->setThisValue(thisValue);
return newCallFrame;
}
if (!arguments.isObject()) {
callFrame->globalData().exception = createInvalidParamError(callFrame, "Function.prototype.apply", arguments);
return 0;
}
if (asObject(arguments)->classInfo() == &Arguments::s_info) {
Arguments* argsObject = asArguments(arguments);
unsigned argCount = argsObject->length(callFrame);
CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + firstFreeRegister + CallFrame::offsetFor(argCount + 1));
if (argCount > Arguments::MaxArguments || !registerFile->grow(newCallFrame->registers())) {
callFrame->globalData().exception = createStackOverflowError(callFrame);
return 0;
}
newCallFrame->setArgumentCountIncludingThis(argCount + 1);
newCallFrame->setThisValue(thisValue);
argsObject->copyToArguments(callFrame, newCallFrame, argCount);
return newCallFrame;
}
if (isJSArray(arguments)) {
JSArray* array = asArray(arguments);
unsigned argCount = array->length();
CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + firstFreeRegister + CallFrame::offsetFor(argCount + 1));
if (argCount > Arguments::MaxArguments || !registerFile->grow(newCallFrame->registers())) {
callFrame->globalData().exception = createStackOverflowError(callFrame);
return 0;
}
newCallFrame->setArgumentCountIncludingThis(argCount + 1);
newCallFrame->setThisValue(thisValue);
array->copyToArguments(callFrame, newCallFrame, argCount);
return newCallFrame;
}
JSObject* argObject = asObject(arguments);
unsigned argCount = argObject->get(callFrame, callFrame->propertyNames().length).toUInt32(callFrame);
CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + firstFreeRegister + CallFrame::offsetFor(argCount + 1));
if (argCount > Arguments::MaxArguments || !registerFile->grow(newCallFrame->registers())) {
callFrame->globalData().exception = createStackOverflowError(callFrame);
return 0;
}
newCallFrame->setArgumentCountIncludingThis(argCount + 1);
newCallFrame->setThisValue(thisValue);
for (size_t i = 0; i < argCount; ++i) {
newCallFrame->setArgument(i, asObject(arguments)->get(callFrame, i));
if (UNLIKELY(callFrame->globalData().exception))
return 0;
}
return newCallFrame;
}
Interpreter::Interpreter()
: m_sampleEntryDepth(0)
, m_reentryDepth(0)
#if !ASSERT_DISABLED
, m_initialized(false)
#endif
, m_classicEnabled(false)
{
}
Interpreter::~Interpreter()
{
#if ENABLE(LLINT)
if (m_classicEnabled)
delete[] m_opcodeTable;
#endif
}
void Interpreter::initialize(LLInt::Data* llintData, bool canUseJIT)
{
UNUSED_PARAM(llintData);
UNUSED_PARAM(canUseJIT);
// If we have LLInt, then we shouldn't be building any kind of classic interpreter.
#if ENABLE(LLINT) && ENABLE(CLASSIC_INTERPRETER)
#error "Building both LLInt and the Classic Interpreter is not supported because it doesn't make sense."
#endif
#if ENABLE(LLINT)
m_opcodeTable = llintData->opcodeMap();
for (int i = 0; i < numOpcodeIDs; ++i)
m_opcodeIDTable.add(m_opcodeTable[i], static_cast<OpcodeID>(i));
m_classicEnabled = false;
#elif ENABLE(COMPUTED_GOTO_CLASSIC_INTERPRETER)
if (canUseJIT) {
// If the JIT is present, don't use jump destinations for opcodes.
for (int i = 0; i < numOpcodeIDs; ++i) {
Opcode opcode = bitwise_cast<void*>(static_cast<uintptr_t>(i));
m_opcodeTable[i] = opcode;
}
m_classicEnabled = false;
} else {
privateExecute(InitializeAndReturn, 0, 0);
for (int i = 0; i < numOpcodeIDs; ++i)
m_opcodeIDTable.add(m_opcodeTable[i], static_cast<OpcodeID>(i));
m_classicEnabled = true;
}
#else
#if ENABLE(CLASSIC_INTERPRETER)
m_classicEnabled = true;
#else
m_classicEnabled = false;
#endif
#endif // ENABLE(COMPUTED_GOTO_CLASSIC_INTERPRETER)
#if !ASSERT_DISABLED
m_initialized = true;
#endif
#if ENABLE(OPCODE_SAMPLING)
enableSampler();
#endif
}
#ifndef NDEBUG
void Interpreter::dumpCallFrame(CallFrame* callFrame)
{
callFrame->codeBlock()->dump(callFrame);
dumpRegisters(callFrame);
}
void Interpreter::dumpRegisters(CallFrame* callFrame)
{
dataLog("Register frame: \n\n");
dataLog("-----------------------------------------------------------------------------\n");
dataLog(" use | address | value \n");
dataLog("-----------------------------------------------------------------------------\n");
CodeBlock* codeBlock = callFrame->codeBlock();
const Register* it;
const Register* end;
JSValue v;
it = callFrame->registers() - RegisterFile::CallFrameHeaderSize - codeBlock->numParameters();
v = (*it).jsValue();
#if USE(JSVALUE32_64)
dataLog("[this] | %10p | %-16s 0x%llx \n", it, v.description(), JSValue::encode(v)); ++it;
#else
dataLog("[this] | %10p | %-16s %p \n", it, v.description(), JSValue::encode(v)); ++it;
#endif
end = it + max(codeBlock->numParameters() - 1, 0); // - 1 to skip "this"
if (it != end) {
do {
v = (*it).jsValue();
#if USE(JSVALUE32_64)
dataLog("[param] | %10p | %-16s 0x%llx \n", it, v.description(), JSValue::encode(v));
#else
dataLog("[param] | %10p | %-16s %p \n", it, v.description(), JSValue::encode(v));
#endif
++it;
} while (it != end);
}
dataLog("-----------------------------------------------------------------------------\n");
dataLog("[CodeBlock] | %10p | %p \n", it, (*it).codeBlock()); ++it;
dataLog("[ScopeChain] | %10p | %p \n", it, (*it).scopeChain()); ++it;
dataLog("[CallerRegisters] | %10p | %d \n", it, (*it).i()); ++it;
dataLog("[ReturnPC] | %10p | %p \n", it, (*it).vPC()); ++it;
dataLog("[ArgumentCount] | %10p | %d \n", it, (*it).i()); ++it;
dataLog("[Callee] | %10p | %p \n", it, (*it).function()); ++it;
dataLog("-----------------------------------------------------------------------------\n");
int registerCount = 0;
end = it + codeBlock->m_numVars;
if (it != end) {
do {
v = (*it).jsValue();
#if USE(JSVALUE32_64)
dataLog("[r%2d] | %10p | %-16s 0x%llx \n", registerCount, it, v.description(), JSValue::encode(v));
#else
dataLog("[r%2d] | %10p | %-16s %p \n", registerCount, it, v.description(), JSValue::encode(v));
#endif
++it;
++registerCount;
} while (it != end);
}
dataLog("-----------------------------------------------------------------------------\n");
end = it + codeBlock->m_numCalleeRegisters - codeBlock->m_numVars;
if (it != end) {
do {
v = (*it).jsValue();
#if USE(JSVALUE32_64)
dataLog("[r%2d] | %10p | %-16s 0x%llx \n", registerCount, it, v.description(), JSValue::encode(v));
#else
dataLog("[r%2d] | %10p | %-16s %p \n", registerCount, it, v.description(), JSValue::encode(v));
#endif
++it;
++registerCount;
} while (it != end);
}
dataLog("-----------------------------------------------------------------------------\n");
}
#endif
bool Interpreter::isOpcode(Opcode opcode)
{
#if ENABLE(COMPUTED_GOTO_CLASSIC_INTERPRETER) || ENABLE(LLINT)
#if !ENABLE(LLINT)
if (!m_classicEnabled)
return opcode >= 0 && static_cast<OpcodeID>(bitwise_cast<uintptr_t>(opcode)) <= op_end;
#endif
return opcode != HashTraits<Opcode>::emptyValue()
&& !HashTraits<Opcode>::isDeletedValue(opcode)
&& m_opcodeIDTable.contains(opcode);
#else
return opcode >= 0 && opcode <= op_end;
#endif
}
NEVER_INLINE bool Interpreter::unwindCallFrame(CallFrame*& callFrame, JSValue exceptionValue, unsigned& bytecodeOffset, CodeBlock*& codeBlock)
{
CodeBlock* oldCodeBlock = codeBlock;
ScopeChainNode* scopeChain = callFrame->scopeChain();
if (Debugger* debugger = callFrame->dynamicGlobalObject()->debugger()) {
DebuggerCallFrame debuggerCallFrame(callFrame, exceptionValue);
if (callFrame->callee())
debugger->returnEvent(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->lastLine());
else
debugger->didExecuteProgram(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->lastLine());
}
// If this call frame created an activation or an 'arguments' object, tear it off.
if (oldCodeBlock->codeType() == FunctionCode && oldCodeBlock->needsFullScopeChain()) {
if (!callFrame->uncheckedR(oldCodeBlock->activationRegister()).jsValue()) {
oldCodeBlock->createActivation(callFrame);
scopeChain = callFrame->scopeChain();
}
while (!scopeChain->object->inherits(&JSActivation::s_info))
scopeChain = scopeChain->pop();
callFrame->setScopeChain(scopeChain);
JSActivation* activation = asActivation(scopeChain->object.get());
activation->tearOff(*scopeChain->globalData);
if (JSValue arguments = callFrame->uncheckedR(unmodifiedArgumentsRegister(oldCodeBlock->argumentsRegister())).jsValue())
asArguments(arguments)->didTearOffActivation(callFrame->globalData(), activation);
} else if (oldCodeBlock->usesArguments() && !oldCodeBlock->isStrictMode()) {
if (JSValue arguments = callFrame->uncheckedR(unmodifiedArgumentsRegister(oldCodeBlock->argumentsRegister())).jsValue())
asArguments(arguments)->tearOff(callFrame);
}
CallFrame* callerFrame = callFrame->callerFrame();
callFrame->globalData().topCallFrame = callerFrame;
if (callerFrame->hasHostCallFrameFlag())
return false;
codeBlock = callerFrame->codeBlock();
// Because of how the JIT records call site->bytecode offset
// information the JIT reports the bytecodeOffset for the returnPC
// to be at the beginning of the opcode that has caused the call.
// In the interpreter we have an actual return address, which is
// the beginning of next instruction to execute. To get an offset
// inside the call instruction that triggered the exception we
// have to subtract 1.
#if ENABLE(JIT) && ENABLE(CLASSIC_INTERPRETER)
if (callerFrame->globalData().canUseJIT())
bytecodeOffset = codeBlock->bytecodeOffset(callerFrame, callFrame->returnPC());
else
bytecodeOffset = codeBlock->bytecodeOffset(callFrame->returnVPC()) - 1;
#elif ENABLE(JIT)
bytecodeOffset = codeBlock->bytecodeOffset(callerFrame, callFrame->returnPC());
#else
bytecodeOffset = codeBlock->bytecodeOffset(callFrame->returnVPC()) - 1;
#endif
callFrame = callerFrame;
return true;
}
static void appendSourceToError(CallFrame* callFrame, ErrorInstance* exception, unsigned bytecodeOffset)
{
exception->clearAppendSourceToMessage();
if (!callFrame->codeBlock()->hasExpressionInfo())
return;
int startOffset = 0;
int endOffset = 0;
int divotPoint = 0;
CodeBlock* codeBlock = callFrame->codeBlock();
codeBlock->expressionRangeForBytecodeOffset(bytecodeOffset, divotPoint, startOffset, endOffset);
int expressionStart = divotPoint - startOffset;
int expressionStop = divotPoint + endOffset;
if (!expressionStop || expressionStart > codeBlock->source()->length())
return;
JSGlobalData* globalData = &callFrame->globalData();
JSValue jsMessage = exception->getDirect(*globalData, globalData->propertyNames->message);
if (!jsMessage || !jsMessage.isString())
return;
UString message = asString(jsMessage)->value(callFrame);
if (expressionStart < expressionStop)
message = makeUString(message, " (evaluating '", codeBlock->source()->getRange(expressionStart, expressionStop), "')");
else {
// No range information, so give a few characters of context
const StringImpl* data = codeBlock->source()->data();
int dataLength = codeBlock->source()->length();
int start = expressionStart;
int stop = expressionStart;
// Get up to 20 characters of context to the left and right of the divot, clamping to the line.
// then strip whitespace.
while (start > 0 && (expressionStart - start < 20) && (*data)[start - 1] != '\n')
start--;
while (start < (expressionStart - 1) && isStrWhiteSpace((*data)[start]))
start++;
while (stop < dataLength && (stop - expressionStart < 20) && (*data)[stop] != '\n')
stop++;
while (stop > expressionStart && isStrWhiteSpace((*data)[stop - 1]))
stop--;
message = makeUString(message, " (near '...", codeBlock->source()->getRange(start, stop), "...')");
}
exception->putDirect(*globalData, globalData->propertyNames->message, jsString(globalData, message));
}
static int getLineNumberForCallFrame(JSGlobalData* globalData, CallFrame* callFrame)
{
UNUSED_PARAM(globalData);
callFrame = callFrame->removeHostCallFrameFlag();
CodeBlock* codeBlock = callFrame->codeBlock();
if (!codeBlock)
return -1;
#if ENABLE(CLASSIC_INTERPRETER)
if (!globalData->canUseJIT())
return codeBlock->lineNumberForBytecodeOffset(callFrame->bytecodeOffsetForNonDFGCode() - 1);
#endif
#if ENABLE(JIT)
#if ENABLE(DFG_JIT)
if (codeBlock->getJITType() == JITCode::DFGJIT)
return codeBlock->lineNumberForBytecodeOffset(codeBlock->codeOrigin(callFrame->codeOriginIndexForDFG()).bytecodeIndex);
#endif
return codeBlock->lineNumberForBytecodeOffset(callFrame->bytecodeOffsetForNonDFGCode());
#else
return -1;
#endif
}
static CallFrame* getCallerInfo(JSGlobalData* globalData, CallFrame* callFrame, int& lineNumber)
{
UNUSED_PARAM(globalData);
unsigned bytecodeOffset = 0;
lineNumber = -1;
ASSERT(!callFrame->hasHostCallFrameFlag());
CallFrame* callerFrame = callFrame->codeBlock() ? callFrame->trueCallerFrame() : callFrame->callerFrame()->removeHostCallFrameFlag();
bool callframeIsHost = callerFrame->addHostCallFrameFlag() == callFrame->callerFrame();
ASSERT(!callerFrame->hasHostCallFrameFlag());
if (callerFrame == CallFrame::noCaller() || !callerFrame || !callerFrame->codeBlock())
return callerFrame;
CodeBlock* callerCodeBlock = callerFrame->codeBlock();
#if ENABLE(JIT)
if (!callFrame->hasReturnPC())
callframeIsHost = true;
#endif
#if ENABLE(DFG_JIT)
if (callFrame->isInlineCallFrame())
callframeIsHost = false;
#endif
if (callframeIsHost) {
// Don't need to deal with inline callframes here as by definition we haven't
// inlined a call with an intervening native call frame.
#if ENABLE(CLASSIC_INTERPRETER)
if (!globalData->canUseJIT()) {
bytecodeOffset = callerFrame->bytecodeOffsetForNonDFGCode();
lineNumber = callerCodeBlock->lineNumberForBytecodeOffset(bytecodeOffset - 1);
return callerFrame;
}
#endif
#if ENABLE(JIT)
#if ENABLE(DFG_JIT)
if (callerCodeBlock && callerCodeBlock->getJITType() == JITCode::DFGJIT) {
unsigned codeOriginIndex = callerFrame->codeOriginIndexForDFG();
bytecodeOffset = callerCodeBlock->codeOrigin(codeOriginIndex).bytecodeIndex;
} else
#endif
bytecodeOffset = callerFrame->bytecodeOffsetForNonDFGCode();
#endif
} else {
#if ENABLE(CLASSIC_INTERPRETER)
if (!globalData->canUseJIT()) {
bytecodeOffset = callerCodeBlock->bytecodeOffset(callFrame->returnVPC());
lineNumber = callerCodeBlock->lineNumberForBytecodeOffset(bytecodeOffset - 1);
return callerFrame;
}
#endif
#if ENABLE(JIT)
#if ENABLE(DFG_JIT)
if (callFrame->isInlineCallFrame()) {
InlineCallFrame* icf = callFrame->inlineCallFrame();
bytecodeOffset = icf->caller.bytecodeIndex;
if (InlineCallFrame* parentCallFrame = icf->caller.inlineCallFrame) {
FunctionExecutable* executable = static_cast<FunctionExecutable*>(parentCallFrame->executable.get());
CodeBlock* newCodeBlock = executable->baselineCodeBlockFor(parentCallFrame->isCall ? CodeForCall : CodeForConstruct);
ASSERT(newCodeBlock);
ASSERT(newCodeBlock->instructionCount() > bytecodeOffset);
callerCodeBlock = newCodeBlock;
}
} else if (callerCodeBlock && callerCodeBlock->getJITType() == JITCode::DFGJIT) {
CodeOrigin origin;
if (!callerCodeBlock->codeOriginForReturn(callFrame->returnPC(), origin))
ASSERT_NOT_REACHED();
bytecodeOffset = origin.bytecodeIndex;
if (InlineCallFrame* icf = origin.inlineCallFrame) {
FunctionExecutable* executable = static_cast<FunctionExecutable*>(icf->executable.get());
CodeBlock* newCodeBlock = executable->baselineCodeBlockFor(icf->isCall ? CodeForCall : CodeForConstruct);
ASSERT(newCodeBlock);
ASSERT(newCodeBlock->instructionCount() > bytecodeOffset);
callerCodeBlock = newCodeBlock;
}
} else
#endif
bytecodeOffset = callerCodeBlock->bytecodeOffset(callerFrame, callFrame->returnPC());
#endif
}
lineNumber = callerCodeBlock->lineNumberForBytecodeOffset(bytecodeOffset);
return callerFrame;
}
static ALWAYS_INLINE const UString getSourceURLFromCallFrame(CallFrame* callFrame)
{
ASSERT(!callFrame->hasHostCallFrameFlag());
#if ENABLE(CLASSIC_INTERPRETER)
#if ENABLE(JIT)
if (callFrame->globalData().canUseJIT())
return callFrame->codeBlock()->ownerExecutable()->sourceURL();
#endif
return callFrame->codeBlock()->source()->url();
#else
return callFrame->codeBlock()->ownerExecutable()->sourceURL();
#endif
}
static StackFrameCodeType getStackFrameCodeType(CallFrame* callFrame)
{
ASSERT(!callFrame->hasHostCallFrameFlag());
switch (callFrame->codeBlock()->codeType()) {
case EvalCode:
return StackFrameEvalCode;
case FunctionCode:
return StackFrameFunctionCode;
case GlobalCode:
return StackFrameGlobalCode;
}
ASSERT_NOT_REACHED();
return StackFrameGlobalCode;
}
void Interpreter::getStackTrace(JSGlobalData* globalData, Vector<StackFrame>& results)
{
CallFrame* callFrame = globalData->topCallFrame->removeHostCallFrameFlag();
if (!callFrame || callFrame == CallFrame::noCaller())
return;
int line = getLineNumberForCallFrame(globalData, callFrame);
callFrame = callFrame->trueCallFrameFromVMCode();
while (callFrame && callFrame != CallFrame::noCaller()) {
UString sourceURL;
if (callFrame->codeBlock()) {
sourceURL = getSourceURLFromCallFrame(callFrame);
StackFrame s = { Strong<JSObject>(*globalData, callFrame->callee()), getStackFrameCodeType(callFrame), Strong<ExecutableBase>(*globalData, callFrame->codeBlock()->ownerExecutable()), line, sourceURL};
results.append(s);
} else {
StackFrame s = { Strong<JSObject>(*globalData, callFrame->callee()), StackFrameNativeCode, Strong<ExecutableBase>(), -1, UString()};
results.append(s);
}
callFrame = getCallerInfo(globalData, callFrame, line);
}
}
void Interpreter::addStackTraceIfNecessary(CallFrame* callFrame, JSObject* error)
{
JSGlobalData* globalData = &callFrame->globalData();
ASSERT(callFrame == globalData->topCallFrame || callFrame == callFrame->lexicalGlobalObject()->globalExec() || callFrame == callFrame->dynamicGlobalObject()->globalExec());
if (error->hasProperty(callFrame, globalData->propertyNames->stack))
return;
Vector<StackFrame> stackTrace;
getStackTrace(&callFrame->globalData(), stackTrace);
if (stackTrace.isEmpty())
return;
JSGlobalObject* globalObject = 0;
if (isTerminatedExecutionException(error) || isInterruptedExecutionException(error))
globalObject = globalData->dynamicGlobalObject;
else
globalObject = error->globalObject();
StringBuilder builder;
for (unsigned i = 0; i < stackTrace.size(); i++) {
builder.append(String(stackTrace[i].toString(globalObject->globalExec()).impl()));
if (i != stackTrace.size() - 1)