/*
- * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009, 2010, 2012-2015 Apple Inc. All rights reserved.
* Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca>
*
* Redistribution and use in source and binary forms, with or without
* 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
+ * 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.
*
#include "config.h"
#include "Interpreter.h"
-#include "Arguments.h"
#include "BatchedTransitionOptimizer.h"
-#include "CallFrame.h"
#include "CallFrameClosure.h"
+#include "CallFrameInlines.h"
+#include "ClonedArguments.h"
#include "CodeBlock.h"
+#include "DirectArguments.h"
#include "Heap.h"
#include "Debugger.h"
#include "DebuggerCallFrame.h"
#include "ErrorInstance.h"
#include "EvalCodeCache.h"
+#include "Exception.h"
#include "ExceptionHelpers.h"
#include "GetterSetter.h"
-#include "JSActivation.h"
#include "JSArray.h"
-#include "JSByteArray.h"
-#include "JSFunction.h"
+#include "JSBoundFunction.h"
+#include "JSCInlines.h"
+#include "JSLexicalEnvironment.h"
+#include "JSNameScope.h"
#include "JSNotAnObject.h"
-#include "JSPropertyNameIterator.h"
-#include "LiteralParser.h"
-#include "JSStaticScopeObject.h"
+#include "JSStackInlines.h"
#include "JSString.h"
+#include "JSWithScope.h"
+#include "LLIntCLoop.h"
+#include "LLIntThunks.h"
+#include "LegacyProfiler.h"
+#include "LiteralParser.h"
#include "ObjectPrototype.h"
-#include "Operations.h"
#include "Parser.h"
-#include "Profiler.h"
+#include "ProtoCallFrame.h"
#include "RegExpObject.h"
#include "RegExpPrototype.h"
#include "Register.h"
#include "SamplingTool.h"
+#include "ScopedArguments.h"
+#include "StackAlignment.h"
+#include "StackVisitor.h"
#include "StrictEvalActivation.h"
-#include "UStringConcatenate.h"
+#include "StrongInlines.h"
+#include "Symbol.h"
+#include "VMEntryScope.h"
+#include "VirtualRegister.h"
+
#include <limits.h>
#include <stdio.h>
+#include <wtf/StackStats.h>
+#include <wtf/StdLibExtras.h>
+#include <wtf/StringPrintStream.h>
#include <wtf/Threading.h>
+#include <wtf/WTFThreadData.h>
+#include <wtf/text/StringBuilder.h>
#if ENABLE(JIT)
#include "JIT.h"
#endif
-#define WTF_USE_GCC_COMPUTED_GOTO_WORKAROUND (ENABLE(COMPUTED_GOTO_INTERPRETER) && !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(INTERPRETER)
-static NEVER_INLINE JSValue concatenateStrings(ExecState* exec, Register* strings, unsigned count)
+String StackFrame::friendlySourceURL() const
{
- 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;
+ 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;
}
-NEVER_INLINE bool Interpreter::resolveSkip(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
+String StackFrame::friendlyFunctionName(CallFrame* callFrame) const
{
- CodeBlock* codeBlock = callFrame->codeBlock();
+ String traceLine;
+ JSObject* stackFrameCallee = callee.get();
- 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);
+ 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;
}
- 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;
+ return traceLine.isNull() ? emptyString() : traceLine;
}
-NEVER_INLINE bool Interpreter::resolveGlobal(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
+JSValue eval(CallFrame* callFrame)
{
- 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;
- }
+ if (!callFrame->argumentCount())
+ return jsUndefined();
- 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;
+ JSValue program = callFrame->argument(0);
+ if (!program.isString())
+ return program;
+
+ TopCallFrameSetter topCallFrame(callFrame->vm(), callFrame);
+ String programSource = asString(program)->value(callFrame);
+ if (callFrame->hadException())
+ return JSValue();
+
+ CallFrame* callerFrame = callFrame->callerFrame();
+ CodeBlock* callerCodeBlock = callerFrame->codeBlock();
+ JSScope* callerScopeChain = callerFrame->uncheckedR(callerCodeBlock->scopeRegister().offset()).Register::scope();
+ EvalExecutable* eval = callerCodeBlock->evalCodeCache().tryGet(callerCodeBlock->isStrictMode(), programSource, callerScopeChain);
+
+ if (!eval) {
+ if (!callerCodeBlock->isStrictMode()) {
+ 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;
+ }
}
+
+ // If the literal parser bailed, it should not have thrown exceptions.
+ ASSERT(!callFrame->vm().exception());
- exceptionValue = callFrame->globalData().exception;
- if (exceptionValue)
- return false;
- callFrame->uncheckedR(dst) = JSValue(result);
- return true;
+ ThisTDZMode thisTDZMode = callerCodeBlock->unlinkedCodeBlock()->constructorKind() == ConstructorKind::Derived ? ThisTDZMode::AlwaysCheck : ThisTDZMode::CheckIfNeeded;
+ eval = callerCodeBlock->evalCodeCache().getSlow(callFrame, callerCodeBlock->ownerExecutable(), callerCodeBlock->isStrictMode(), thisTDZMode, programSource, callerScopeChain);
+ if (!eval)
+ return jsUndefined();
}
- exceptionValue = createUndefinedVariableError(callFrame, ident);
- return false;
+ JSValue thisValue = callerFrame->thisValue();
+ Interpreter* interpreter = callFrame->vm().interpreter;
+ return interpreter->execute(eval, callFrame, thisValue, callerScopeChain);
}
-NEVER_INLINE bool Interpreter::resolveGlobalDynamic(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
+unsigned sizeOfVarargs(CallFrame* callFrame, JSValue arguments, uint32_t firstVarArgOffset)
{
- 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 (UNLIKELY(!arguments.isCell())) {
+ if (arguments.isUndefinedOrNull())
+ return 0;
+
+ callFrame->vm().throwException(callFrame, createInvalidFunctionApplyParameterError(callFrame, arguments));
+ return 0;
}
- 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;
+ JSCell* cell = arguments.asCell();
+ unsigned length;
+ switch (cell->type()) {
+ case DirectArgumentsType:
+ length = jsCast<DirectArguments*>(cell)->length(callFrame);
+ break;
+ case ScopedArgumentsType:
+ length =jsCast<ScopedArguments*>(cell)->length(callFrame);
+ break;
+ case StringType:
+ callFrame->vm().throwException(callFrame, createInvalidFunctionApplyParameterError(callFrame, arguments));
+ return 0;
+ default:
+ ASSERT(arguments.isObject());
+ if (isJSArray(cell))
+ length = jsCast<JSArray*>(cell)->length();
+ else
+ length = jsCast<JSObject*>(cell)->get(callFrame, callFrame->propertyNames().length).toUInt32(callFrame);
+ break;
}
- exceptionValue = createUndefinedVariableError(callFrame, ident);
- return false;
+ if (length >= firstVarArgOffset)
+ length -= firstVarArgOffset;
+ else
+ length = 0;
+
+ return length;
}
-NEVER_INLINE void Interpreter::resolveBase(CallFrame* callFrame, Instruction* vPC)
+unsigned sizeFrameForVarargs(CallFrame* callFrame, JSStack* stack, JSValue arguments, unsigned numUsedStackSlots, uint32_t firstVarArgOffset)
{
- 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());
+ unsigned length = sizeOfVarargs(callFrame, arguments, firstVarArgOffset);
+
+ CallFrame* calleeFrame = calleeFrameForVarargs(callFrame, numUsedStackSlots, length + 1);
+ if (length > maxArguments || !stack->ensureCapacityFor(calleeFrame->registers())) {
+ throwStackOverflowError(callFrame);
+ return 0;
+ }
+
+ return length;
}
-NEVER_INLINE bool Interpreter::resolveBaseAndProperty(CallFrame* callFrame, Instruction* vPC, JSValue& exceptionValue)
+void loadVarargs(CallFrame* callFrame, VirtualRegister firstElementDest, JSValue arguments, uint32_t offset, uint32_t length)
{
- 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;
+ if (UNLIKELY(!arguments.isCell()))
+ return;
+
+ JSCell* cell = arguments.asCell();
+ switch (cell->type()) {
+ case DirectArgumentsType:
+ jsCast<DirectArguments*>(cell)->copyToArguments(callFrame, firstElementDest, offset, length);
+ return;
+ case ScopedArgumentsType:
+ jsCast<ScopedArguments*>(cell)->copyToArguments(callFrame, firstElementDest, offset, length);
+ return;
+ default: {
+ ASSERT(arguments.isObject());
+ JSObject* object = jsCast<JSObject*>(cell);
+ if (isJSArray(object)) {
+ jsCast<JSArray*>(object)->copyToArguments(callFrame, firstElementDest, offset, length);
+ return;
}
- ++iter;
- } while (iter != end);
-
- exceptionValue = createUndefinedVariableError(callFrame, ident);
- return false;
+ unsigned i;
+ for (i = 0; i < length && object->canGetIndexQuickly(i + offset); ++i)
+ callFrame->r(firstElementDest + i) = object->getIndexQuickly(i + offset);
+ for (; i < length; ++i)
+ callFrame->r(firstElementDest + i) = object->get(callFrame, i + offset);
+ return;
+ } }
}
-#endif // ENABLE(INTERPRETER)
-
-ALWAYS_INLINE CallFrame* Interpreter::slideRegisterWindowForCall(CodeBlock* newCodeBlock, RegisterFile* registerFile, CallFrame* callFrame, size_t registerOffset, int argc)
+void setupVarargsFrame(CallFrame* callFrame, CallFrame* newCallFrame, JSValue arguments, uint32_t offset, uint32_t length)
{
- Register* r = callFrame->registers();
- Register* newEnd = r + registerOffset + newCodeBlock->m_numCalleeRegisters;
-
- if (LIKELY(argc == newCodeBlock->m_numParameters)) { // correct number of arguments
- if (UNLIKELY(!registerFile->grow(newEnd)))
- return 0;
- r += registerOffset;
- } else if (argc < newCodeBlock->m_numParameters) { // too few arguments -- fill in the blanks
- size_t omittedArgCount = newCodeBlock->m_numParameters - argc;
- registerOffset += omittedArgCount;
- newEnd += omittedArgCount;
- if (!registerFile->grow(newEnd))
- return 0;
- r += registerOffset;
-
- Register* argv = r - RegisterFile::CallFrameHeaderSize - omittedArgCount;
- for (size_t i = 0; i < omittedArgCount; ++i)
- argv[i] = jsUndefined();
- } else { // too many arguments -- copy expected arguments, leaving the extra arguments behind
- size_t numParameters = newCodeBlock->m_numParameters;
- registerOffset += numParameters;
- newEnd += numParameters;
-
- if (!registerFile->grow(newEnd))
- return 0;
- r += registerOffset;
-
- Register* argv = r - RegisterFile::CallFrameHeaderSize - numParameters - argc;
- for (size_t i = 0; i < numParameters; ++i)
- argv[i + argc] = argv[i];
- }
-
- return CallFrame::create(r);
+ VirtualRegister calleeFrameOffset(newCallFrame - callFrame);
+
+ loadVarargs(
+ callFrame,
+ calleeFrameOffset + CallFrame::argumentOffset(0),
+ arguments, offset, length);
+
+ newCallFrame->setArgumentCountIncludingThis(length + 1);
}
-#if ENABLE(INTERPRETER)
-static NEVER_INLINE bool isInvalidParamForIn(CallFrame* callFrame, JSValue value, JSValue& exceptionData)
+void setupVarargsFrameAndSetThis(CallFrame* callFrame, CallFrame* newCallFrame, JSValue thisValue, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length)
{
- if (value.isObject())
- return false;
- exceptionData = createInvalidParamError(callFrame, "in" , value);
- return true;
+ setupVarargsFrame(callFrame, newCallFrame, arguments, firstVarArgOffset, length);
+ newCallFrame->setThisValue(thisValue);
}
-static NEVER_INLINE bool isInvalidParamForInstanceOf(CallFrame* callFrame, JSValue value, JSValue& exceptionData)
+Interpreter::Interpreter(VM& vm)
+ : m_sampleEntryDepth(0)
+ , m_vm(vm)
+ , m_stack(vm)
+ , m_errorHandlingModeReentry(0)
+#if !ASSERT_DISABLED
+ , m_initialized(false)
+#endif
{
- if (value.isObject() && asObject(value)->structure()->typeInfo().implementsHasInstance())
- return false;
- exceptionData = createInvalidParamError(callFrame, "instanceof" , value);
- return true;
}
-#endif
-NEVER_INLINE JSValue Interpreter::callEval(CallFrame* callFrame, RegisterFile* registerFile, Register* argv, int argc, int registerOffset)
+Interpreter::~Interpreter()
{
- if (argc < 2)
- return jsUndefined();
-
- JSValue program = argv[1].jsValue();
-
- if (!program.isString())
- return program;
-
- UString programSource = asString(program)->value(callFrame);
- if (callFrame->hadException())
- return JSValue();
-
- CodeBlock* codeBlock = callFrame->codeBlock();
- if (!codeBlock->isStrictMode()) {
- // FIXME: We can use the preparser in strict mode, we just need additional logic
- // to prevent duplicates.
- LiteralParser preparser(callFrame, programSource.characters(), programSource.length(), LiteralParser::NonStrictJSON);
- if (JSValue parsedObject = preparser.tryLiteralParse())
- return parsedObject;
- }
-
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- JSValue exceptionValue;
- EvalExecutable* eval = codeBlock->evalCodeCache().get(callFrame, codeBlock->ownerExecutable(), codeBlock->isStrictMode(), programSource, scopeChain, exceptionValue);
-
- ASSERT(!eval == exceptionValue);
- if (UNLIKELY(!eval))
- return throwError(callFrame, exceptionValue);
-
- return callFrame->globalData().interpreter->execute(eval, callFrame, callFrame->uncheckedR(codeBlock->thisRegister()).jsValue().toThisObject(callFrame), callFrame->registers() - registerFile->start() + registerOffset, scopeChain);
}
-Interpreter::Interpreter(JSGlobalData& globalData)
- : m_sampleEntryDepth(0)
- , m_reentryDepth(0)
- , m_registerFile(globalData)
+void Interpreter::initialize(bool canUseJIT)
{
-#if ENABLE(COMPUTED_GOTO_INTERPRETER)
- privateExecute(InitializeAndReturn, 0, 0);
+ UNUSED_PARAM(canUseJIT);
+#if ENABLE(COMPUTED_GOTO_OPCODES)
+ m_opcodeTable = LLInt::opcodeMap();
for (int i = 0; i < numOpcodeIDs; ++i)
m_opcodeIDTable.add(m_opcodeTable[i], static_cast<OpcodeID>(i));
-#endif // ENABLE(COMPUTED_GOTO_INTERPRETER)
+#endif
+
+#if !ASSERT_DISABLED
+ m_initialized = true;
+#endif
#if ENABLE(OPCODE_SAMPLING)
enableSampler();
#endif
}
-#ifndef NDEBUG
+#ifdef NDEBUG
+
+void Interpreter::dumpCallFrame(CallFrame*)
+{
+}
+
+#else
void Interpreter::dumpCallFrame(CallFrame* callFrame)
{
- callFrame->codeBlock()->dump(callFrame);
+ callFrame->codeBlock()->dumpBytecode();
dumpRegisters(callFrame);
}
+class DumpRegisterFunctor {
+public:
+ DumpRegisterFunctor(const Register*& it)
+ : m_hasSkippedFirstFrame(false)
+ , m_it(it)
+ {
+ }
+
+ StackVisitor::Status operator()(StackVisitor& visitor)
+ {
+ if (!m_hasSkippedFirstFrame) {
+ m_hasSkippedFirstFrame = true;
+ return StackVisitor::Continue;
+ }
+
+ unsigned line = 0;
+ unsigned unusedColumn = 0;
+ visitor->computeLineAndColumn(line, unusedColumn);
+ dataLogF("[ReturnVPC] | %10p | %d (line %d)\n", m_it, visitor->bytecodeOffset(), line);
+ --m_it;
+ return StackVisitor::Done;
+ }
+
+private:
+ bool m_hasSkippedFirstFrame;
+ const Register*& m_it;
+};
+
void Interpreter::dumpRegisters(CallFrame* callFrame)
{
- printf("Register frame: \n\n");
- printf("-----------------------------------------------------------------------------\n");
- printf(" use | address | value \n");
- printf("-----------------------------------------------------------------------------\n");
+ dataLogF("Register frame: \n\n");
+ dataLogF("-----------------------------------------------------------------------------\n");
+ dataLogF(" use | address | value \n");
+ dataLogF("-----------------------------------------------------------------------------\n");
CodeBlock* codeBlock = callFrame->codeBlock();
- RegisterFile* registerFile = &callFrame->scopeChain()->globalObject->globalData().interpreter->registerFile();
const Register* it;
const Register* end;
- JSValue v;
-
- if (codeBlock->codeType() == GlobalCode) {
- it = registerFile->lastGlobal();
- end = it + registerFile->numGlobals();
- while (it != end) {
- v = (*it).jsValue();
-#if USE(JSVALUE32_64)
- printf("[global var] | %10p | %-16s 0x%llx \n", it, v.description(), JSValue::encode(v));
-#else
- printf("[global var] | %10p | %-16s %p \n", it, v.description(), JSValue::encode(v));
-#endif
- ++it;
- }
- printf("-----------------------------------------------------------------------------\n");
+
+ it = callFrame->registers() + JSStack::ThisArgument + callFrame->argumentCount();
+ end = callFrame->registers() + JSStack::ThisArgument - 1;
+ while (it > end) {
+ JSValue v = it->jsValue();
+ int registerNumber = it - callFrame->registers();
+ String name = codeBlock->nameForRegister(VirtualRegister(registerNumber));
+ dataLogF("[r% 3d %14s] | %10p | %-16s 0x%lld \n", registerNumber, name.ascii().data(), it, toCString(v).data(), (long long)JSValue::encode(v));
+ --it;
}
- it = callFrame->registers() - RegisterFile::CallFrameHeaderSize - codeBlock->m_numParameters;
- v = (*it).jsValue();
-#if USE(JSVALUE32_64)
- printf("[this] | %10p | %-16s 0x%llx \n", it, v.description(), JSValue::encode(v)); ++it;
-#else
- printf("[this] | %10p | %-16s %p \n", it, v.description(), JSValue::encode(v)); ++it;
-#endif
- end = it + max(codeBlock->m_numParameters - 1, 0); // - 1 to skip "this"
- if (it != end) {
- do {
- v = (*it).jsValue();
-#if USE(JSVALUE32_64)
- printf("[param] | %10p | %-16s 0x%llx \n", it, v.description(), JSValue::encode(v));
-#else
- printf("[param] | %10p | %-16s %p \n", it, v.description(), JSValue::encode(v));
+ dataLogF("-----------------------------------------------------------------------------\n");
+ dataLogF("[ArgumentCount] | %10p | %lu \n", it, (unsigned long) callFrame->argumentCount());
+ --it;
+ dataLogF("[CallerFrame] | %10p | %p \n", it, callFrame->callerFrame());
+ --it;
+ dataLogF("[Callee] | %10p | %p \n", it, callFrame->callee());
+ --it;
+ // FIXME: Remove the next decrement when the ScopeChain slot is removed from the call header
+ --it;
+#if ENABLE(JIT)
+ AbstractPC pc = callFrame->abstractReturnPC(callFrame->vm());
+ if (pc.hasJITReturnAddress())
+ dataLogF("[ReturnJITPC] | %10p | %p \n", it, pc.jitReturnAddress().value());
#endif
- ++it;
- } while (it != end);
- }
- printf("-----------------------------------------------------------------------------\n");
- printf("[CodeBlock] | %10p | %p \n", it, (*it).codeBlock()); ++it;
- printf("[ScopeChain] | %10p | %p \n", it, (*it).scopeChain()); ++it;
- printf("[CallerRegisters] | %10p | %d \n", it, (*it).i()); ++it;
- printf("[ReturnPC] | %10p | %p \n", it, (*it).vPC()); ++it;
- printf("[ArgumentCount] | %10p | %d \n", it, (*it).i()); ++it;
- printf("[Callee] | %10p | %p \n", it, (*it).function()); ++it;
- printf("-----------------------------------------------------------------------------\n");
-
- int registerCount = 0;
-
- end = it + codeBlock->m_numVars;
+
+ DumpRegisterFunctor functor(it);
+ callFrame->iterate(functor);
+
+ dataLogF("[CodeBlock] | %10p | %p \n", it, callFrame->codeBlock());
+ --it;
+ dataLogF("-----------------------------------------------------------------------------\n");
+
+ end = it - codeBlock->m_numVars;
if (it != end) {
do {
- v = (*it).jsValue();
-#if USE(JSVALUE32_64)
- printf("[r%2d] | %10p | %-16s 0x%llx \n", registerCount, it, v.description(), JSValue::encode(v));
-#else
- printf("[r%2d] | %10p | %-16s %p \n", registerCount, it, v.description(), JSValue::encode(v));
-#endif
- ++it;
- ++registerCount;
+ JSValue v = it->jsValue();
+ int registerNumber = it - callFrame->registers();
+ String name = codeBlock->nameForRegister(VirtualRegister(registerNumber));
+ dataLogF("[r% 3d %14s] | %10p | %-16s 0x%lld \n", registerNumber, name.ascii().data(), it, toCString(v).data(), (long long)JSValue::encode(v));
+ --it;
} while (it != end);
}
- printf("-----------------------------------------------------------------------------\n");
+ dataLogF("-----------------------------------------------------------------------------\n");
- end = it + codeBlock->m_numCalleeRegisters - codeBlock->m_numVars;
+ end = it - codeBlock->m_numCalleeRegisters + codeBlock->m_numVars;
if (it != end) {
do {
- v = (*it).jsValue();
-#if USE(JSVALUE32_64)
- printf("[r%2d] | %10p | %-16s 0x%llx \n", registerCount, it, v.description(), JSValue::encode(v));
-#else
- printf("[r%2d] | %10p | %-16s %p \n", registerCount, it, v.description(), JSValue::encode(v));
-#endif
- ++it;
- ++registerCount;
+ JSValue v = (*it).jsValue();
+ int registerNumber = it - callFrame->registers();
+ dataLogF("[r% 3d] | %10p | %-16s 0x%lld \n", registerNumber, it, toCString(v).data(), (long long)JSValue::encode(v));
+ --it;
} while (it != end);
}
- printf("-----------------------------------------------------------------------------\n");
+ dataLogF("-----------------------------------------------------------------------------\n");
}
#endif
bool Interpreter::isOpcode(Opcode opcode)
{
-#if ENABLE(COMPUTED_GOTO_INTERPRETER)
+#if ENABLE(COMPUTED_GOTO_OPCODES)
return opcode != HashTraits<Opcode>::emptyValue()
&& !HashTraits<Opcode>::isDeletedValue(opcode)
&& m_opcodeIDTable.contains(opcode);
#endif
}
-NEVER_INLINE bool Interpreter::unwindCallFrame(CallFrame*& callFrame, JSValue exceptionValue, unsigned& bytecodeOffset, CodeBlock*& codeBlock)
+static bool unwindCallFrame(StackVisitor& visitor)
{
- 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());
+ CallFrame* callFrame = visitor->callFrame();
+ if (Debugger* debugger = callFrame->vmEntryGlobalObject()->debugger()) {
+ SuspendExceptionScope scope(&callFrame->vm());
+ if (jsDynamicCast<JSFunction*>(callFrame->callee()))
+ debugger->returnEvent(callFrame);
else
- debugger->didExecuteProgram(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->ownerExecutable()->lastLine());
+ debugger->didExecuteProgram(callFrame);
+ ASSERT(!callFrame->hadException());
}
- // 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->copyRegisters(*scopeChain->globalData);
- if (JSValue arguments = callFrame->uncheckedR(unmodifiedArgumentsRegister(oldCodeBlock->argumentsRegister())).jsValue()) {
- if (!oldCodeBlock->isStrictMode())
- asArguments(arguments)->setActivation(callFrame->globalData(), activation);
- }
- } else if (oldCodeBlock->usesArguments() && !oldCodeBlock->isStrictMode()) {
- if (JSValue arguments = callFrame->uncheckedR(unmodifiedArgumentsRegister(oldCodeBlock->argumentsRegister())).jsValue())
- asArguments(arguments)->copyRegisters(callFrame->globalData());
+ return !visitor->callerIsVMEntryFrame();
+}
+
+static StackFrameCodeType getStackFrameCodeType(StackVisitor& visitor)
+{
+ switch (visitor->codeType()) {
+ case StackVisitor::Frame::Eval:
+ return StackFrameEvalCode;
+ case StackVisitor::Frame::Function:
+ return StackFrameFunctionCode;
+ case StackVisitor::Frame::Global:
+ return StackFrameGlobalCode;
+ case StackVisitor::Frame::Native:
+ ASSERT_NOT_REACHED();
+ return StackFrameNativeCode;
}
+ RELEASE_ASSERT_NOT_REACHED();
+ return StackFrameGlobalCode;
+}
- CallFrame* callerFrame = callFrame->callerFrame();
- if (callerFrame->hasHostCallFrameFlag())
- return false;
+void StackFrame::computeLineAndColumn(unsigned& line, unsigned& column)
+{
+ if (!codeBlock) {
+ line = 0;
+ column = 0;
+ return;
+ }
- 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(INTERPRETER)
- if (callerFrame->globalData().canUseJIT())
- bytecodeOffset = codeBlock->bytecodeOffset(callFrame->returnPC());
- else
- bytecodeOffset = codeBlock->bytecodeOffset(callFrame->returnVPC()) - 1;
-#elif ENABLE(JIT)
- bytecodeOffset = codeBlock->bytecodeOffset(callFrame->returnPC());
-#else
- bytecodeOffset = codeBlock->bytecodeOffset(callFrame->returnVPC()) - 1;
-#endif
+ int divot = 0;
+ int unusedStartOffset = 0;
+ int unusedEndOffset = 0;
+ unsigned divotLine = 0;
+ unsigned divotColumn = 0;
+ expressionInfo(divot, unusedStartOffset, unusedEndOffset, divotLine, divotColumn);
- callFrame = callerFrame;
- return true;
+ line = divotLine + lineOffset;
+ column = divotColumn + (divotLine ? 1 : firstLineColumnOffset);
+
+ if (executable->hasOverrideLineNumber())
+ line = executable->overrideLineNumber();
}
-static void appendSourceToError(CallFrame* callFrame, ErrorInstance* exception, unsigned bytecodeOffset)
+void StackFrame::expressionInfo(int& divot, int& startOffset, int& endOffset, unsigned& line, unsigned& column)
{
- exception->clearAppendSourceToMessage();
+ codeBlock->expressionRangeForBytecodeOffset(bytecodeOffset, divot, startOffset, endOffset, line, column);
+ divot += characterOffset;
+}
- if (!callFrame->codeBlock()->hasExpressionInfo())
- return;
+String StackFrame::toString(CallFrame* callFrame)
+{
+ StringBuilder traceBuild;
+ String functionName = friendlyFunctionName(callFrame);
+ String sourceURL = friendlySourceURL();
+ traceBuild.append(functionName);
+ if (!sourceURL.isEmpty()) {
+ if (!functionName.isEmpty())
+ traceBuild.append('@');
+ traceBuild.append(sourceURL);
+ if (codeType != StackFrameNativeCode) {
+ unsigned line;
+ unsigned column;
+ computeLineAndColumn(line, column);
+
+ traceBuild.append(':');
+ traceBuild.appendNumber(line);
+ traceBuild.append(':');
+ traceBuild.appendNumber(column);
+ }
+ }
+ return traceBuild.toString().impl();
+}
- int startOffset = 0;
- int endOffset = 0;
- int divotPoint = 0;
+class GetStackTraceFunctor {
+public:
+ GetStackTraceFunctor(VM& vm, Vector<StackFrame>& results, size_t remainingCapacity)
+ : m_vm(vm)
+ , m_results(results)
+ , m_remainingCapacityForFrameCapture(remainingCapacity)
+ {
+ }
- CodeBlock* codeBlock = callFrame->codeBlock();
- codeBlock->expressionRangeForBytecodeOffset(bytecodeOffset, divotPoint, startOffset, endOffset);
+ StackVisitor::Status operator()(StackVisitor& visitor)
+ {
+ VM& vm = m_vm;
+ if (m_remainingCapacityForFrameCapture) {
+ if (visitor->isJSFrame() && !visitor->codeBlock()->unlinkedCodeBlock()->isBuiltinFunction()) {
+ CodeBlock* codeBlock = visitor->codeBlock();
+ StackFrame s = {
+ Strong<JSObject>(vm, visitor->callee()),
+ getStackFrameCodeType(visitor),
+ Strong<ScriptExecutable>(vm, codeBlock->ownerExecutable()),
+ Strong<UnlinkedCodeBlock>(vm, codeBlock->unlinkedCodeBlock()),
+ codeBlock->source(),
+ codeBlock->ownerExecutable()->firstLine(),
+ codeBlock->firstLineColumnOffset(),
+ codeBlock->sourceOffset(),
+ visitor->bytecodeOffset(),
+ visitor->sourceURL()
+ };
+ m_results.append(s);
+ } else {
+ StackFrame s = { Strong<JSObject>(vm, visitor->callee()), StackFrameNativeCode, Strong<ScriptExecutable>(), Strong<UnlinkedCodeBlock>(), 0, 0, 0, 0, 0, String()};
+ m_results.append(s);
+ }
+
+ m_remainingCapacityForFrameCapture--;
+ return StackVisitor::Continue;
+ }
+ return StackVisitor::Done;
+ }
- int expressionStart = divotPoint - startOffset;
- int expressionStop = divotPoint + endOffset;
+private:
+ VM& m_vm;
+ Vector<StackFrame>& m_results;
+ size_t m_remainingCapacityForFrameCapture;
+};
- if (!expressionStop || expressionStart > codeBlock->source()->length())
+void Interpreter::getStackTrace(Vector<StackFrame>& results, size_t maxStackSize)
+{
+ VM& vm = m_vm;
+ CallFrame* callFrame = vm.topCallFrame;
+ if (!callFrame)
return;
- JSGlobalData* globalData = &callFrame->globalData();
- JSValue jsMessage = exception->getDirect(*globalData, globalData->propertyNames->message);
- if (!jsMessage || !jsMessage.isString())
- return;
+ GetStackTraceFunctor functor(vm, results, maxStackSize);
+ callFrame->iterate(functor);
+}
+
+JSString* Interpreter::stackTraceAsString(ExecState* exec, Vector<StackFrame> stackTrace)
+{
+ // FIXME: JSStringJoiner could be more efficient than StringBuilder here.
+ StringBuilder builder;
+ for (unsigned i = 0; i < stackTrace.size(); i++) {
+ builder.append(String(stackTrace[i].toString(exec)));
+ if (i != stackTrace.size() - 1)
+ builder.append('\n');
+ }
+ return jsString(&exec->vm(), builder.toString());
+}
- 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 UChar* 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), "...')");
+class GetCatchHandlerFunctor {
+public:
+ GetCatchHandlerFunctor()
+ : m_handler(0)
+ {
}
- exception->putDirect(*globalData, globalData->propertyNames->message, jsString(globalData, message));
-}
+ HandlerInfo* handler() { return m_handler; }
-NEVER_INLINE HandlerInfo* Interpreter::throwException(CallFrame*& callFrame, JSValue& exceptionValue, unsigned bytecodeOffset)
-{
- CodeBlock* codeBlock = callFrame->codeBlock();
- bool isInterrupt = false;
+ StackVisitor::Status operator()(StackVisitor& visitor)
+ {
+ CodeBlock* codeBlock = visitor->codeBlock();
+ if (!codeBlock)
+ return StackVisitor::Continue;
- // Set up the exception object
- if (exceptionValue.isObject()) {
- JSObject* exception = asObject(exceptionValue);
+ unsigned bytecodeOffset = visitor->bytecodeOffset();
+ m_handler = codeBlock->handlerForBytecodeOffset(bytecodeOffset, CodeBlock::RequiredHandler::CatchHandler);
+ if (m_handler)
+ return StackVisitor::Done;
- if (exception->isErrorInstance() && static_cast<ErrorInstance*>(exception)->appendSourceToMessage())
- appendSourceToError(callFrame, static_cast<ErrorInstance*>(exception), bytecodeOffset);
+ return StackVisitor::Continue;
+ }
- // Using hasExpressionInfo to imply we are interested in rich exception info.
- if (codeBlock->hasExpressionInfo() && !hasErrorInfo(callFrame, exception)) {
- ASSERT(codeBlock->hasLineInfo());
+private:
+ HandlerInfo* m_handler;
+};
- // FIXME: should only really be adding these properties to VM generated exceptions,
- // but the inspector currently requires these for all thrown objects.
- addErrorInfo(callFrame, exception, codeBlock->lineNumberForBytecodeOffset(bytecodeOffset), codeBlock->ownerExecutable()->source());
- }
+class UnwindFunctor {
+public:
+ UnwindFunctor(VMEntryFrame*& vmEntryFrame, CallFrame*& callFrame, bool isTermination, CodeBlock*& codeBlock, HandlerInfo*& handler)
+ : m_vmEntryFrame(vmEntryFrame)
+ , m_callFrame(callFrame)
+ , m_isTermination(isTermination)
+ , m_codeBlock(codeBlock)
+ , m_handler(handler)
+ {
+ }
- ComplType exceptionType = exception->exceptionType();
- isInterrupt = exceptionType == Interrupted || exceptionType == Terminated;
+ StackVisitor::Status operator()(StackVisitor& visitor)
+ {
+ VM& vm = m_callFrame->vm();
+ m_vmEntryFrame = visitor->vmEntryFrame();
+ m_callFrame = visitor->callFrame();
+ m_codeBlock = visitor->codeBlock();
+ unsigned bytecodeOffset = visitor->bytecodeOffset();
+
+ if (m_isTermination || !(m_handler = m_codeBlock ? m_codeBlock->handlerForBytecodeOffset(bytecodeOffset) : nullptr)) {
+ if (!unwindCallFrame(visitor)) {
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->exceptionUnwind(m_callFrame);
+ return StackVisitor::Done;
+ }
+ } else
+ return StackVisitor::Done;
+
+ return StackVisitor::Continue;
}
- if (Debugger* debugger = callFrame->dynamicGlobalObject()->debugger()) {
- DebuggerCallFrame debuggerCallFrame(callFrame, exceptionValue);
- bool hasHandler = codeBlock->handlerForBytecodeOffset(bytecodeOffset);
- debugger->exception(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->lineNumberForBytecodeOffset(bytecodeOffset), hasHandler);
+private:
+ VMEntryFrame*& m_vmEntryFrame;
+ CallFrame*& m_callFrame;
+ bool m_isTermination;
+ CodeBlock*& m_codeBlock;
+ HandlerInfo*& m_handler;
+};
+
+NEVER_INLINE HandlerInfo* Interpreter::unwind(VMEntryFrame*& vmEntryFrame, CallFrame*& callFrame, Exception* exception)
+{
+ CodeBlock* codeBlock = callFrame->codeBlock();
+ bool isTermination = false;
+
+ JSValue exceptionValue = exception->value();
+ ASSERT(!exceptionValue.isEmpty());
+ ASSERT(!exceptionValue.isCell() || exceptionValue.asCell());
+ // This shouldn't be possible (hence the assertions), but we're already in the slowest of
+ // slow cases, so let's harden against it anyway to be safe.
+ if (exceptionValue.isEmpty() || (exceptionValue.isCell() && !exceptionValue.asCell()))
+ exceptionValue = jsNull();
+
+ if (exceptionValue.isObject())
+ isTermination = isTerminatedExecutionException(exception);
+
+ ASSERT(callFrame->vm().exception() && callFrame->vm().exception()->stack().size());
+
+ Debugger* debugger = callFrame->vmEntryGlobalObject()->debugger();
+ if (debugger && debugger->needsExceptionCallbacks() && !exception->didNotifyInspectorOfThrow()) {
+ // We need to clear the exception here in order to see if a new exception happens.
+ // Afterwards, the values are put back to continue processing this error.
+ SuspendExceptionScope scope(&callFrame->vm());
+ // This code assumes that if the debugger is enabled then there is no inlining.
+ // If that assumption turns out to be false then we'll ignore the inlined call
+ // frames.
+ // https://bugs.webkit.org/show_bug.cgi?id=121754
+
+ bool hasCatchHandler;
+ if (isTermination)
+ hasCatchHandler = false;
+ else {
+ GetCatchHandlerFunctor functor;
+ callFrame->iterate(functor);
+ HandlerInfo* handler = functor.handler();
+ ASSERT(!handler || handler->isCatchHandler());
+ hasCatchHandler = !!handler;
+ }
+
+ debugger->exception(callFrame, exceptionValue, hasCatchHandler);
+ ASSERT(!callFrame->hadException());
}
+ exception->setDidNotifyInspectorOfThrow();
// Calculate an exception handler vPC, unwinding call frames as necessary.
HandlerInfo* handler = 0;
- while (isInterrupt || !(handler = codeBlock->handlerForBytecodeOffset(bytecodeOffset))) {
- if (!unwindCallFrame(callFrame, exceptionValue, bytecodeOffset, codeBlock)) {
- if (Profiler* profiler = *Profiler::enabledProfilerReference())
- profiler->exceptionUnwind(callFrame);
- return 0;
- }
- }
+ VM& vm = callFrame->vm();
+ ASSERT(callFrame == vm.topCallFrame);
+ UnwindFunctor functor(vmEntryFrame, callFrame, isTermination, codeBlock, handler);
+ callFrame->iterate(functor);
+ if (!handler)
+ return 0;
- if (Profiler* profiler = *Profiler::enabledProfilerReference())
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
profiler->exceptionUnwind(callFrame);
- // Shrink the JS stack, in case stack overflow made it huge.
- Register* highWaterMark = 0;
- for (CallFrame* callerFrame = callFrame; callerFrame; callerFrame = callerFrame->callerFrame()->removeHostCallFrameFlag()) {
- CodeBlock* codeBlock = callerFrame->codeBlock();
- if (!codeBlock)
- continue;
- Register* callerHighWaterMark = callerFrame->registers() + codeBlock->m_numCalleeRegisters;
- highWaterMark = max(highWaterMark, callerHighWaterMark);
- }
- m_registerFile.shrink(highWaterMark);
-
// Unwind the scope chain within the exception handler's call frame.
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- int scopeDelta = 0;
- if (!codeBlock->needsFullScopeChain() || codeBlock->codeType() != FunctionCode
- || callFrame->uncheckedR(codeBlock->activationRegister()).jsValue())
- scopeDelta = depth(codeBlock, scopeChain) - handler->scopeDepth;
- ASSERT(scopeDelta >= 0);
+ int targetScopeDepth = handler->scopeDepth;
+ if (codeBlock->needsActivation() && callFrame->hasActivation())
+ ++targetScopeDepth;
+
+ int scopeRegisterOffset = codeBlock->scopeRegister().offset();
+ JSScope* scope = callFrame->scope(scopeRegisterOffset);
+ int scopeDelta = scope->depth() - targetScopeDepth;
+ RELEASE_ASSERT(scopeDelta >= 0);
+
while (scopeDelta--)
- scopeChain = scopeChain->pop();
- callFrame->setScopeChain(scopeChain);
+ scope = scope->next();
+
+ callFrame->setScope(scopeRegisterOffset, scope);
return handler;
}
return returnValue;
}
-JSValue Interpreter::execute(ProgramExecutable* program, CallFrame* callFrame, ScopeChainNode* scopeChain, JSObject* thisObj)
+class SamplingScope {
+public:
+ SamplingScope(Interpreter* interpreter)
+ : m_interpreter(interpreter)
+ {
+ interpreter->startSampling();
+ }
+ ~SamplingScope()
+ {
+ m_interpreter->stopSampling();
+ }
+private:
+ Interpreter* m_interpreter;
+};
+
+JSValue Interpreter::execute(ProgramExecutable* program, CallFrame* callFrame, JSObject* thisObj)
{
- ASSERT(!scopeChain->globalData->exception);
- ASSERT(!callFrame->globalData().isCollectorBusy());
- if (callFrame->globalData().isCollectorBusy())
+ SamplingScope samplingScope(this);
+
+ JSScope* scope = thisObj->globalObject();
+ VM& vm = *scope->vm();
+
+ ASSERT(!vm.exception());
+ ASSERT(!vm.isCollectorBusy());
+ RELEASE_ASSERT(vm.currentThreadIsHoldingAPILock());
+ if (vm.isCollectorBusy())
return jsNull();
- if (m_reentryDepth >= MaxSmallThreadReentryDepth && m_reentryDepth >= callFrame->globalData().maxReentryDepth)
+ if (!vm.isSafeToRecurse())
return checkedReturn(throwStackOverflowError(callFrame));
- DynamicGlobalObjectScope globalObjectScope(*scopeChain->globalData, scopeChain->globalObject.get());
- LiteralParser literalParser(callFrame, program->source().data(), program->source().length(), LiteralParser::JSONP);
- Vector<LiteralParser::JSONPData> JSONPData;
- if (literalParser.tryJSONPParse(JSONPData, scopeChain->globalObject->supportsRichSourceInfo())) {
- JSGlobalObject* globalObject = scopeChain->globalObject.get();
+ // First check if the "program" is actually just a JSON object. If so,
+ // we'll handle the JSON object here. Else, we'll handle real JS code
+ // below at failedJSONP.
+
+ Vector<JSONPData> JSONPData;
+ bool parseResult;
+ const String programSource = program->source().toString();
+ if (programSource.isNull())
+ return jsUndefined();
+ if (programSource.is8Bit()) {
+ LiteralParser<LChar> literalParser(callFrame, programSource.characters8(), programSource.length(), JSONP);
+ parseResult = literalParser.tryJSONPParse(JSONPData, scope->globalObject()->globalObjectMethodTable()->supportsRichSourceInfo(scope->globalObject()));
+ } else {
+ LiteralParser<UChar> literalParser(callFrame, programSource.characters16(), programSource.length(), JSONP);
+ parseResult = literalParser.tryJSONPParse(JSONPData, scope->globalObject()->globalObjectMethodTable()->supportsRichSourceInfo(scope->globalObject()));
+ }
+
+ if (parseResult) {
+ JSGlobalObject* globalObject = scope->globalObject();
JSValue result;
for (unsigned entry = 0; entry < JSONPData.size(); entry++) {
- Vector<LiteralParser::JSONPPathEntry> JSONPPath;
+ Vector<JSONPPathEntry> JSONPPath;
JSONPPath.swap(JSONPData[entry].m_path);
JSValue JSONPValue = JSONPData[entry].m_value.get();
- if (JSONPPath.size() == 1 && JSONPPath[0].m_type == LiteralParser::JSONPPathEntryTypeDeclare) {
- if (globalObject->hasProperty(callFrame, JSONPPath[0].m_pathEntryName)) {
- PutPropertySlot slot;
- globalObject->put(callFrame, JSONPPath[0].m_pathEntryName, JSONPValue, slot);
- } else
- globalObject->putWithAttributes(callFrame, JSONPPath[0].m_pathEntryName, JSONPValue, DontEnum | DontDelete);
- // var declarations return undefined
+ if (JSONPPath.size() == 1 && JSONPPath[0].m_type == JSONPPathEntryTypeDeclare) {
+ globalObject->addVar(callFrame, JSONPPath[0].m_pathEntryName);
+ PutPropertySlot slot(globalObject);
+ globalObject->methodTable()->put(globalObject, callFrame, JSONPPath[0].m_pathEntryName, JSONPValue, slot);
result = jsUndefined();
continue;
}
JSValue baseObject(globalObject);
for (unsigned i = 0; i < JSONPPath.size() - 1; i++) {
- ASSERT(JSONPPath[i].m_type != LiteralParser::JSONPPathEntryTypeDeclare);
+ ASSERT(JSONPPath[i].m_type != JSONPPathEntryTypeDeclare);
switch (JSONPPath[i].m_type) {
- case LiteralParser::JSONPPathEntryTypeDot: {
+ case JSONPPathEntryTypeDot: {
if (i == 0) {
PropertySlot slot(globalObject);
if (!globalObject->getPropertySlot(callFrame, JSONPPath[i].m_pathEntryName, slot)) {
if (entry)
- return throwError(callFrame, createUndefinedVariableError(globalObject->globalExec(), JSONPPath[i].m_pathEntryName));
+ return callFrame->vm().throwException(callFrame, createUndefinedVariableError(callFrame, JSONPPath[i].m_pathEntryName));
goto failedJSONP;
}
baseObject = slot.getValue(callFrame, JSONPPath[i].m_pathEntryName);
return jsUndefined();
continue;
}
- case LiteralParser::JSONPPathEntryTypeLookup: {
+ case JSONPPathEntryTypeLookup: {
baseObject = baseObject.get(callFrame, JSONPPath[i].m_pathIndex);
if (callFrame->hadException())
return jsUndefined();
continue;
}
default:
- ASSERT_NOT_REACHED();
+ RELEASE_ASSERT_NOT_REACHED();
return jsUndefined();
}
}
- PutPropertySlot slot;
+ PutPropertySlot slot(baseObject);
switch (JSONPPath.last().m_type) {
- case LiteralParser::JSONPPathEntryTypeCall: {
+ case JSONPPathEntryTypeCall: {
JSValue function = baseObject.get(callFrame, JSONPPath.last().m_pathEntryName);
if (callFrame->hadException())
return jsUndefined();
CallData callData;
CallType callType = getCallData(function, callData);
if (callType == CallTypeNone)
- return throwError(callFrame, createNotAFunctionError(callFrame, function));
+ return callFrame->vm().throwException(callFrame, createNotAFunctionError(callFrame, function));
MarkedArgumentBuffer jsonArg;
jsonArg.append(JSONPValue);
JSValue thisValue = JSONPPath.size() == 1 ? jsUndefined(): baseObject;
return jsUndefined();
break;
}
- case LiteralParser::JSONPPathEntryTypeDot: {
+ case JSONPPathEntryTypeDot: {
baseObject.put(callFrame, JSONPPath.last().m_pathEntryName, JSONPValue, slot);
if (callFrame->hadException())
return jsUndefined();
break;
}
- case LiteralParser::JSONPPathEntryTypeLookup: {
- baseObject.put(callFrame, JSONPPath.last().m_pathIndex, JSONPValue);
+ case JSONPPathEntryTypeLookup: {
+ baseObject.putByIndex(callFrame, JSONPPath.last().m_pathIndex, JSONPValue, slot.isStrictMode());
if (callFrame->hadException())
return jsUndefined();
break;
}
default:
- ASSERT_NOT_REACHED();
+ RELEASE_ASSERT_NOT_REACHED();
return jsUndefined();
}
result = JSONPValue;
return result;
}
failedJSONP:
- JSObject* error = program->compile(callFrame, scopeChain);
- if (error)
- return checkedReturn(throwError(callFrame, error));
- CodeBlock* codeBlock = &program->generatedBytecode();
-
- Register* oldEnd = m_registerFile.end();
- Register* newEnd = oldEnd + codeBlock->m_numParameters + RegisterFile::CallFrameHeaderSize + codeBlock->m_numCalleeRegisters;
- if (!m_registerFile.grow(newEnd))
- return checkedReturn(throwStackOverflowError(callFrame));
+ // If we get here, then we have already proven that the script is not a JSON
+ // object.
- JSGlobalObject* lastGlobalObject = m_registerFile.globalObject();
- JSGlobalObject* globalObject = callFrame->dynamicGlobalObject();
- globalObject->copyGlobalsTo(m_registerFile);
+ VMEntryScope entryScope(vm, scope->globalObject());
- CallFrame* newCallFrame = CallFrame::create(oldEnd + codeBlock->m_numParameters + RegisterFile::CallFrameHeaderSize);
- ASSERT(codeBlock->m_numParameters == 1); // 1 parameter for 'this'.
- newCallFrame->init(codeBlock, 0, scopeChain, CallFrame::noCaller(), codeBlock->m_numParameters, 0);
- newCallFrame->uncheckedR(newCallFrame->hostThisRegister()) = JSValue(thisObj);
+ // Compile source to bytecode if necessary:
+ if (JSObject* error = program->initializeGlobalProperties(vm, callFrame, scope))
+ return checkedReturn(callFrame->vm().throwException(callFrame, error));
- Profiler** profiler = Profiler::enabledProfilerReference();
- if (*profiler)
- (*profiler)->willExecute(callFrame, program->sourceURL(), program->lineNo());
+ if (JSObject* error = program->prepareForExecution(callFrame, nullptr, scope, CodeForCall))
+ return checkedReturn(callFrame->vm().throwException(callFrame, error));
+ ProgramCodeBlock* codeBlock = program->codeBlock();
+
+ if (UNLIKELY(vm.watchdog && vm.watchdog->didFire(callFrame)))
+ return throwTerminatedExecutionException(callFrame);
+
+ ASSERT(codeBlock->numParameters() == 1); // 1 parameter for 'this'.
+
+ ProtoCallFrame protoCallFrame;
+ protoCallFrame.init(codeBlock, JSCallee::create(vm, scope->globalObject(), scope), thisObj, 1);
+
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->willExecute(callFrame, program->sourceURL(), program->firstLine(), program->startColumn());
+
+ // Execute the code:
JSValue result;
{
SamplingTool::CallRecord callRecord(m_sampler.get());
+ Watchdog::Scope watchdogScope(vm.watchdog.get());
- m_reentryDepth++;
-#if ENABLE(JIT)
- if (callFrame->globalData().canUseJIT())
- result = program->generatedJITCode().execute(&m_registerFile, newCallFrame, scopeChain->globalData);
- else
-#endif
- result = privateExecute(Normal, &m_registerFile, newCallFrame);
-
- m_reentryDepth--;
+ result = program->generatedJITCode()->execute(&vm, &protoCallFrame);
}
- if (*profiler)
- (*profiler)->didExecute(callFrame, program->sourceURL(), program->lineNo());
-
- if (m_reentryDepth && lastGlobalObject && globalObject != lastGlobalObject)
- lastGlobalObject->copyGlobalsTo(m_registerFile);
-
- m_registerFile.shrink(oldEnd);
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->didExecute(callFrame, program->sourceURL(), program->firstLine(), program->startColumn());
return checkedReturn(result);
}
JSValue Interpreter::executeCall(CallFrame* callFrame, JSObject* function, CallType callType, const CallData& callData, JSValue thisValue, const ArgList& args)
{
+ VM& vm = callFrame->vm();
ASSERT(!callFrame->hadException());
- ASSERT(!callFrame->globalData().isCollectorBusy());
- if (callFrame->globalData().isCollectorBusy())
+ ASSERT(!vm.isCollectorBusy());
+ if (vm.isCollectorBusy())
return jsNull();
- if (m_reentryDepth >= MaxSmallThreadReentryDepth && m_reentryDepth >= callFrame->globalData().maxReentryDepth)
- return checkedReturn(throwStackOverflowError(callFrame));
-
- Register* oldEnd = m_registerFile.end();
- int argCount = 1 + args.size(); // implicit "this" parameter
- size_t registerOffset = argCount + RegisterFile::CallFrameHeaderSize;
-
- if (!m_registerFile.grow(oldEnd + registerOffset))
- return checkedReturn(throwStackOverflowError(callFrame));
+ bool isJSCall = (callType == CallTypeJS);
+ JSScope* scope = nullptr;
+ CodeBlock* newCodeBlock;
+ size_t argsCount = 1 + args.size(); // implicit "this" parameter
- CallFrame* newCallFrame = CallFrame::create(oldEnd);
- size_t dst = 0;
- newCallFrame->uncheckedR(0) = thisValue;
- ArgList::const_iterator end = args.end();
- for (ArgList::const_iterator it = args.begin(); it != end; ++it)
- newCallFrame->uncheckedR(++dst) = *it;
+ JSGlobalObject* globalObject;
- if (callType == CallTypeJS) {
- ScopeChainNode* callDataScopeChain = callData.js.scopeChain;
+ if (isJSCall) {
+ scope = callData.js.scope;
+ globalObject = scope->globalObject();
+ } else {
+ ASSERT(callType == CallTypeHost);
+ globalObject = function->globalObject();
+ }
- DynamicGlobalObjectScope globalObjectScope(*callDataScopeChain->globalData, callDataScopeChain->globalObject.get());
+ VMEntryScope entryScope(vm, globalObject);
+ if (!vm.isSafeToRecurse())
+ return checkedReturn(throwStackOverflowError(callFrame));
- JSObject* compileError = callData.js.functionExecutable->compileForCall(callFrame, callDataScopeChain);
+ if (isJSCall) {
+ // Compile the callee:
+ JSObject* compileError = callData.js.functionExecutable->prepareForExecution(callFrame, jsCast<JSFunction*>(function), scope, CodeForCall);
if (UNLIKELY(!!compileError)) {
- m_registerFile.shrink(oldEnd);
- return checkedReturn(throwError(callFrame, compileError));
+ return checkedReturn(callFrame->vm().throwException(callFrame, compileError));
}
+ newCodeBlock = callData.js.functionExecutable->codeBlockForCall();
+ ASSERT(!!newCodeBlock);
+ newCodeBlock->m_shouldAlwaysBeInlined = false;
+ } else
+ newCodeBlock = 0;
- CodeBlock* newCodeBlock = &callData.js.functionExecutable->generatedBytecodeForCall();
- newCallFrame = slideRegisterWindowForCall(newCodeBlock, &m_registerFile, newCallFrame, registerOffset, argCount);
- if (UNLIKELY(!newCallFrame)) {
- m_registerFile.shrink(oldEnd);
- return checkedReturn(throwStackOverflowError(callFrame));
- }
+ if (UNLIKELY(vm.watchdog && vm.watchdog->didFire(callFrame)))
+ return throwTerminatedExecutionException(callFrame);
- newCallFrame->init(newCodeBlock, 0, callDataScopeChain, callFrame->addHostCallFrameFlag(), argCount, function);
+ ProtoCallFrame protoCallFrame;
+ protoCallFrame.init(newCodeBlock, function, thisValue, argsCount, args.data());
- Profiler** profiler = Profiler::enabledProfilerReference();
- if (*profiler)
- (*profiler)->willExecute(callFrame, function);
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->willExecute(callFrame, function);
- JSValue result;
- {
- SamplingTool::CallRecord callRecord(m_sampler.get());
+ JSValue result;
+ {
+ SamplingTool::CallRecord callRecord(m_sampler.get(), !isJSCall);
+ Watchdog::Scope watchdogScope(vm.watchdog.get());
- m_reentryDepth++;
-#if ENABLE(JIT)
- if (callFrame->globalData().canUseJIT())
- result = callData.js.functionExecutable->generatedJITCodeForCall().execute(&m_registerFile, newCallFrame, callDataScopeChain->globalData);
- else
-#endif
- result = privateExecute(Normal, &m_registerFile, newCallFrame);
- m_reentryDepth--;
+ // Execute the code:
+ if (isJSCall)
+ result = callData.js.functionExecutable->generatedJITCodeForCall()->execute(&vm, &protoCallFrame);
+ else {
+ result = JSValue::decode(vmEntryToNative(reinterpret_cast<void*>(callData.native.function), &vm, &protoCallFrame));
+ if (callFrame->hadException())
+ result = jsNull();
}
-
- if (*profiler)
- (*profiler)->didExecute(callFrame, function);
-
- m_registerFile.shrink(oldEnd);
- return checkedReturn(result);
}
- ASSERT(callType == CallTypeHost);
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- newCallFrame = CallFrame::create(newCallFrame->registers() + registerOffset);
- newCallFrame->init(0, 0, scopeChain, callFrame->addHostCallFrameFlag(), argCount, function);
-
- DynamicGlobalObjectScope globalObjectScope(*scopeChain->globalData, scopeChain->globalObject.get());
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->didExecute(callFrame, function);
- Profiler** profiler = Profiler::enabledProfilerReference();
- if (*profiler)
- (*profiler)->willExecute(callFrame, function);
-
- JSValue result;
- {
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- result = JSValue::decode(callData.native.function(newCallFrame));
- }
-
- if (*profiler)
- (*profiler)->didExecute(callFrame, function);
-
- m_registerFile.shrink(oldEnd);
- return checkedReturn(result);
-}
+ return checkedReturn(result);
+}
JSObject* Interpreter::executeConstruct(CallFrame* callFrame, JSObject* constructor, ConstructType constructType, const ConstructData& constructData, const ArgList& args)
{
+ VM& vm = callFrame->vm();
ASSERT(!callFrame->hadException());
- ASSERT(!callFrame->globalData().isCollectorBusy());
+ ASSERT(!vm.isCollectorBusy());
// We throw in this case because we have to return something "valid" but we're
// already in an invalid state.
- if (callFrame->globalData().isCollectorBusy())
- return checkedReturn(throwStackOverflowError(callFrame));
-
- if (m_reentryDepth >= MaxSmallThreadReentryDepth && m_reentryDepth >= callFrame->globalData().maxReentryDepth)
+ if (vm.isCollectorBusy())
return checkedReturn(throwStackOverflowError(callFrame));
- Register* oldEnd = m_registerFile.end();
- int argCount = 1 + args.size(); // implicit "this" parameter
- size_t registerOffset = argCount + RegisterFile::CallFrameHeaderSize;
+ bool isJSConstruct = (constructType == ConstructTypeJS);
+ JSScope* scope = nullptr;
+ CodeBlock* newCodeBlock;
+ size_t argsCount = 1 + args.size(); // implicit "this" parameter
- if (!m_registerFile.grow(oldEnd + registerOffset))
- return checkedReturn(throwStackOverflowError(callFrame));
-
- CallFrame* newCallFrame = CallFrame::create(oldEnd);
- size_t dst = 0;
- ArgList::const_iterator end = args.end();
- for (ArgList::const_iterator it = args.begin(); it != end; ++it)
- newCallFrame->uncheckedR(++dst) = *it;
+ JSGlobalObject* globalObject;
- if (constructType == ConstructTypeJS) {
- ScopeChainNode* constructDataScopeChain = constructData.js.scopeChain;
+ if (isJSConstruct) {
+ scope = constructData.js.scope;
+ globalObject = scope->globalObject();
+ } else {
+ ASSERT(constructType == ConstructTypeHost);
+ globalObject = constructor->globalObject();
+ }
- DynamicGlobalObjectScope globalObjectScope(*constructDataScopeChain->globalData, constructDataScopeChain->globalObject.get());
+ VMEntryScope entryScope(vm, globalObject);
+ if (!vm.isSafeToRecurse())
+ return checkedReturn(throwStackOverflowError(callFrame));
- JSObject* compileError = constructData.js.functionExecutable->compileForConstruct(callFrame, constructDataScopeChain);
+ if (isJSConstruct) {
+ // Compile the callee:
+ JSObject* compileError = constructData.js.functionExecutable->prepareForExecution(callFrame, jsCast<JSFunction*>(constructor), scope, CodeForConstruct);
if (UNLIKELY(!!compileError)) {
- m_registerFile.shrink(oldEnd);
- return checkedReturn(throwError(callFrame, compileError));
- }
-
- CodeBlock* newCodeBlock = &constructData.js.functionExecutable->generatedBytecodeForConstruct();
- newCallFrame = slideRegisterWindowForCall(newCodeBlock, &m_registerFile, newCallFrame, registerOffset, argCount);
- if (UNLIKELY(!newCallFrame)) {
- m_registerFile.shrink(oldEnd);
- return checkedReturn(throwStackOverflowError(callFrame));
- }
-
- newCallFrame->init(newCodeBlock, 0, constructDataScopeChain, callFrame->addHostCallFrameFlag(), argCount, constructor);
-
- Profiler** profiler = Profiler::enabledProfilerReference();
- if (*profiler)
- (*profiler)->willExecute(callFrame, constructor);
-
- JSValue result;
- {
- SamplingTool::CallRecord callRecord(m_sampler.get());
-
- m_reentryDepth++;
-#if ENABLE(JIT)
- if (callFrame->globalData().canUseJIT())
- result = constructData.js.functionExecutable->generatedJITCodeForConstruct().execute(&m_registerFile, newCallFrame, constructDataScopeChain->globalData);
- else
-#endif
- result = privateExecute(Normal, &m_registerFile, newCallFrame);
- m_reentryDepth--;
+ return checkedReturn(callFrame->vm().throwException(callFrame, compileError));
}
+ newCodeBlock = constructData.js.functionExecutable->codeBlockForConstruct();
+ ASSERT(!!newCodeBlock);
+ newCodeBlock->m_shouldAlwaysBeInlined = false;
+ } else
+ newCodeBlock = 0;
- if (*profiler)
- (*profiler)->didExecute(callFrame, constructor);
-
- m_registerFile.shrink(oldEnd);
- if (callFrame->hadException())
- return 0;
- ASSERT(result.isObject());
- return checkedReturn(asObject(result));
- }
-
- ASSERT(constructType == ConstructTypeHost);
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- newCallFrame = CallFrame::create(newCallFrame->registers() + registerOffset);
- newCallFrame->init(0, 0, scopeChain, callFrame->addHostCallFrameFlag(), argCount, constructor);
+ if (UNLIKELY(vm.watchdog && vm.watchdog->didFire(callFrame)))
+ return throwTerminatedExecutionException(callFrame);
- DynamicGlobalObjectScope globalObjectScope(*scopeChain->globalData, scopeChain->globalObject.get());
+ ProtoCallFrame protoCallFrame;
+ protoCallFrame.init(newCodeBlock, constructor, constructor, argsCount, args.data());
- Profiler** profiler = Profiler::enabledProfilerReference();
- if (*profiler)
- (*profiler)->willExecute(callFrame, constructor);
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->willExecute(callFrame, constructor);
JSValue result;
{
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- result = JSValue::decode(constructData.native.function(newCallFrame));
+ SamplingTool::CallRecord callRecord(m_sampler.get(), !isJSConstruct);
+ Watchdog::Scope watchdogScope(vm.watchdog.get());
+
+ // Execute the code.
+ if (isJSConstruct)
+ result = constructData.js.functionExecutable->generatedJITCodeForConstruct()->execute(&vm, &protoCallFrame);
+ else {
+ result = JSValue::decode(vmEntryToNative(reinterpret_cast<void*>(constructData.native.function), &vm, &protoCallFrame));
+
+ if (!callFrame->hadException())
+ RELEASE_ASSERT(result.isObject());
+ }
}
- if (*profiler)
- (*profiler)->didExecute(callFrame, constructor);
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->didExecute(callFrame, constructor);
- m_registerFile.shrink(oldEnd);
if (callFrame->hadException())
return 0;
ASSERT(result.isObject());
return checkedReturn(asObject(result));
}
-CallFrameClosure Interpreter::prepareForRepeatCall(FunctionExecutable* FunctionExecutable, CallFrame* callFrame, JSFunction* function, int argCount, ScopeChainNode* scopeChain)
+CallFrameClosure Interpreter::prepareForRepeatCall(FunctionExecutable* functionExecutable, CallFrame* callFrame, ProtoCallFrame* protoCallFrame, JSFunction* function, int argumentCountIncludingThis, JSScope* scope, JSValue* args)
{
- ASSERT(!scopeChain->globalData->exception);
-
- if (m_reentryDepth >= MaxSmallThreadReentryDepth) {
- if (m_reentryDepth >= callFrame->globalData().maxReentryDepth) {
- throwStackOverflowError(callFrame);
- return CallFrameClosure();
- }
- }
+ VM& vm = *scope->vm();
+ ASSERT(!vm.exception());
- Register* oldEnd = m_registerFile.end();
- int argc = 1 + argCount; // implicit "this" parameter
-
- if (!m_registerFile.grow(oldEnd + argc)) {
- throwStackOverflowError(callFrame);
+ if (vm.isCollectorBusy())
return CallFrameClosure();
- }
- CallFrame* newCallFrame = CallFrame::create(oldEnd);
- // We initialise |this| unnecessarily here for the sake of code clarity
- size_t dst = 0;
- for (int i = 0; i < argc; ++i)
- newCallFrame->uncheckedR(dst++) = jsUndefined();
-
- JSObject* error = FunctionExecutable->compileForCall(callFrame, scopeChain);
+ // Compile the callee:
+ JSObject* error = functionExecutable->prepareForExecution(callFrame, function, scope, CodeForCall);
if (error) {
- throwError(callFrame, error);
- m_registerFile.shrink(oldEnd);
+ callFrame->vm().throwException(callFrame, error);
return CallFrameClosure();
}
- CodeBlock* codeBlock = &FunctionExecutable->generatedBytecodeForCall();
+ CodeBlock* newCodeBlock = functionExecutable->codeBlockForCall();
+ newCodeBlock->m_shouldAlwaysBeInlined = false;
- newCallFrame = slideRegisterWindowForCall(codeBlock, &m_registerFile, newCallFrame, argc + RegisterFile::CallFrameHeaderSize, argc);
- if (UNLIKELY(!newCallFrame)) {
- throwStackOverflowError(callFrame);
- m_registerFile.shrink(oldEnd);
- return CallFrameClosure();
- }
- newCallFrame->init(codeBlock, 0, scopeChain, callFrame->addHostCallFrameFlag(), argc, function);
- CallFrameClosure result = { callFrame, newCallFrame, function, FunctionExecutable, scopeChain->globalData, oldEnd, scopeChain, codeBlock->m_numParameters, argc };
+ size_t argsCount = argumentCountIncludingThis;
+
+ protoCallFrame->init(newCodeBlock, function, jsUndefined(), argsCount, args);
+ // Return the successful closure:
+ CallFrameClosure result = { callFrame, protoCallFrame, function, functionExecutable, &vm, scope, newCodeBlock->numParameters(), argumentCountIncludingThis };
return result;
}
JSValue Interpreter::execute(CallFrameClosure& closure)
{
- ASSERT(!closure.oldCallFrame->globalData().isCollectorBusy());
- if (closure.oldCallFrame->globalData().isCollectorBusy())
- return jsNull();
- closure.resetCallFrame();
- Profiler** profiler = Profiler::enabledProfilerReference();
- if (*profiler)
- (*profiler)->willExecute(closure.oldCallFrame, closure.function);
+ VM& vm = *closure.vm;
+ SamplingScope samplingScope(this);
+ ASSERT(!vm.isCollectorBusy());
+ RELEASE_ASSERT(vm.currentThreadIsHoldingAPILock());
+ if (vm.isCollectorBusy())
+ return jsNull();
+
+ StackStats::CheckPoint stackCheckPoint;
+
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->willExecute(closure.oldCallFrame, closure.function);
+
+ if (UNLIKELY(vm.watchdog && vm.watchdog->didFire(closure.oldCallFrame)))
+ return throwTerminatedExecutionException(closure.oldCallFrame);
+
+ // Execute the code:
JSValue result;
{
SamplingTool::CallRecord callRecord(m_sampler.get());
-
- m_reentryDepth++;
-#if ENABLE(JIT)
-#if ENABLE(INTERPRETER)
- if (closure.newCallFrame->globalData().canUseJIT())
-#endif
- result = closure.functionExecutable->generatedJITCodeForCall().execute(&m_registerFile, closure.newCallFrame, closure.globalData);
-#if ENABLE(INTERPRETER)
- else
-#endif
-#endif
-#if ENABLE(INTERPRETER)
- result = privateExecute(Normal, &m_registerFile, closure.newCallFrame);
-#endif
- m_reentryDepth--;
+ Watchdog::Scope watchdogScope(vm.watchdog.get());
+
+ result = closure.functionExecutable->generatedJITCodeForCall()->execute(&vm, closure.protoCallFrame);
}
-
- if (*profiler)
- (*profiler)->didExecute(closure.oldCallFrame, closure.function);
- return checkedReturn(result);
-}
-void Interpreter::endRepeatCall(CallFrameClosure& closure)
-{
- m_registerFile.shrink(closure.oldEnd);
-}
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->didExecute(closure.oldCallFrame, closure.function);
-JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSObject* thisObj, ScopeChainNode* scopeChain)
-{
- JSObject* compileError = eval->compile(callFrame, scopeChain);
- if (UNLIKELY(!!compileError))
- return checkedReturn(throwError(callFrame, compileError));
- return execute(eval, callFrame, thisObj, m_registerFile.size() + eval->generatedBytecode().m_numParameters + RegisterFile::CallFrameHeaderSize, scopeChain);
+ return checkedReturn(result);
}
-JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSObject* thisObj, int globalRegisterOffset, ScopeChainNode* scopeChain)
+JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSValue thisValue, JSScope* scope)
{
- ASSERT(!scopeChain->globalData->exception);
- ASSERT(!callFrame->globalData().isCollectorBusy());
- if (callFrame->globalData().isCollectorBusy())
+ VM& vm = *scope->vm();
+ SamplingScope samplingScope(this);
+
+ ASSERT(scope->vm() == &callFrame->vm());
+ ASSERT(!vm.exception());
+ ASSERT(!vm.isCollectorBusy());
+ RELEASE_ASSERT(vm.currentThreadIsHoldingAPILock());
+ if (vm.isCollectorBusy())
return jsNull();
- DynamicGlobalObjectScope globalObjectScope(*scopeChain->globalData, scopeChain->globalObject.get());
-
- if (m_reentryDepth >= MaxSmallThreadReentryDepth && m_reentryDepth >= callFrame->globalData().maxReentryDepth)
- return checkedReturn(throwStackOverflowError(callFrame));
-
- JSObject* compileError = eval->compile(callFrame, scopeChain);
- if (UNLIKELY(!!compileError))
- return checkedReturn(throwError(callFrame, compileError));
- EvalCodeBlock* codeBlock = &eval->generatedBytecode();
-
- JSObject* variableObject;
- for (ScopeChainNode* node = scopeChain; ; node = node->next.get()) {
- ASSERT(node);
- if (node->object->isVariableObject()) {
- variableObject = static_cast<JSVariableObject*>(node->object.get());
- break;
+ VMEntryScope entryScope(vm, scope->globalObject());
+ if (!vm.isSafeToRecurse())
+ return checkedReturn(throwStackOverflowError(callFrame));
+
+ unsigned numVariables = eval->numVariables();
+ int numFunctions = eval->numberOfFunctionDecls();
+
+ JSScope* variableObject;
+ if ((numVariables || numFunctions) && eval->isStrictMode()) {
+ scope = StrictEvalActivation::create(callFrame, scope);
+ variableObject = scope;
+ } else {
+ for (JSScope* node = scope; ; node = node->next()) {
+ RELEASE_ASSERT(node);
+ if (node->isVariableObject()) {
+ ASSERT(!node->isNameScopeObject());
+ variableObject = node;
+ break;
+ }
}
}
- unsigned numVariables = codeBlock->numVariables();
- int numFunctions = codeBlock->numberOfFunctionDecls();
- bool pushedScope = false;
+ JSObject* compileError = eval->prepareForExecution(callFrame, nullptr, scope, CodeForCall);
+ if (UNLIKELY(!!compileError))
+ return checkedReturn(callFrame->vm().throwException(callFrame, compileError));
+ EvalCodeBlock* codeBlock = eval->codeBlock();
+
if (numVariables || numFunctions) {
- if (codeBlock->isStrictMode()) {
- variableObject = new (callFrame) StrictEvalActivation(callFrame);
- scopeChain = scopeChain->push(variableObject);
- pushedScope = true;
- }
- // Scope for BatchedTransitionOptimizer
- BatchedTransitionOptimizer optimizer(callFrame->globalData(), variableObject);
+ BatchedTransitionOptimizer optimizer(vm, variableObject);
+ if (variableObject->next())
+ variableObject->globalObject()->varInjectionWatchpoint()->fireAll("Executed eval, fired VarInjection watchpoint");
for (unsigned i = 0; i < numVariables; ++i) {
const Identifier& ident = codeBlock->variable(i);
if (!variableObject->hasProperty(callFrame, ident)) {
- PutPropertySlot slot;
- variableObject->put(callFrame, ident, jsUndefined(), slot);
+ PutPropertySlot slot(variableObject);
+ variableObject->methodTable()->put(variableObject, callFrame, ident, jsUndefined(), slot);
}
}
for (int i = 0; i < numFunctions; ++i) {
FunctionExecutable* function = codeBlock->functionDecl(i);
- PutPropertySlot slot;
- variableObject->put(callFrame, function->name(), function->make(callFrame, scopeChain), slot);
+ PutPropertySlot slot(variableObject);
+ variableObject->methodTable()->put(variableObject, callFrame, function->name(), JSFunction::create(vm, function, scope), slot);
}
}
- Register* oldEnd = m_registerFile.end();
- Register* newEnd = m_registerFile.start() + globalRegisterOffset + codeBlock->m_numCalleeRegisters;
- if (!m_registerFile.grow(newEnd)) {
- if (pushedScope)
- scopeChain->pop();
- return checkedReturn(throwStackOverflowError(callFrame));
- }
+ if (UNLIKELY(vm.watchdog && vm.watchdog->didFire(callFrame)))
+ return throwTerminatedExecutionException(callFrame);
- CallFrame* newCallFrame = CallFrame::create(m_registerFile.start() + globalRegisterOffset);
+ ASSERT(codeBlock->numParameters() == 1); // 1 parameter for 'this'.
- ASSERT(codeBlock->m_numParameters == 1); // 1 parameter for 'this'.
- newCallFrame->init(codeBlock, 0, scopeChain, callFrame->addHostCallFrameFlag(), codeBlock->m_numParameters, 0);
- newCallFrame->uncheckedR(newCallFrame->hostThisRegister()) = JSValue(thisObj);
+ ProtoCallFrame protoCallFrame;
+ protoCallFrame.init(codeBlock, JSCallee::create(vm, scope->globalObject(), scope), thisValue, 1);
- Profiler** profiler = Profiler::enabledProfilerReference();
- if (*profiler)
- (*profiler)->willExecute(callFrame, eval->sourceURL(), eval->lineNo());
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->willExecute(callFrame, eval->sourceURL(), eval->firstLine(), eval->startColumn());
+ // Execute the code:
JSValue result;
{
SamplingTool::CallRecord callRecord(m_sampler.get());
+ Watchdog::Scope watchdogScope(vm.watchdog.get());
- m_reentryDepth++;
-
-#if ENABLE(JIT)
-#if ENABLE(INTERPRETER)
- if (callFrame->globalData().canUseJIT())
-#endif
- result = eval->generatedJITCode().execute(&m_registerFile, newCallFrame, scopeChain->globalData);
-#if ENABLE(INTERPRETER)
- else
-#endif
-#endif
-#if ENABLE(INTERPRETER)
- result = privateExecute(Normal, &m_registerFile, newCallFrame);
-#endif
- m_reentryDepth--;
+ result = eval->generatedJITCode()->execute(&vm, &protoCallFrame);
}
- if (*profiler)
- (*profiler)->didExecute(callFrame, eval->sourceURL(), eval->lineNo());
+ if (LegacyProfiler* profiler = vm.enabledProfiler())
+ profiler->didExecute(callFrame, eval->sourceURL(), eval->firstLine(), eval->startColumn());
- m_registerFile.shrink(oldEnd);
- if (pushedScope)
- scopeChain->pop();
return checkedReturn(result);
}
-NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHookID, int firstLine, int lastLine)
+NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHookID)
{
- Debugger* debugger = callFrame->dynamicGlobalObject()->debugger();
+ Debugger* debugger = callFrame->vmEntryGlobalObject()->debugger();
if (!debugger)
return;
+ ASSERT(callFrame->codeBlock()->hasDebuggerRequests());
+ ASSERT(!callFrame->hadException());
+
switch (debugHookID) {
case DidEnterCallFrame:
- debugger->callEvent(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), firstLine);
- return;
- case WillLeaveCallFrame:
- debugger->returnEvent(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), lastLine);
- return;
- case WillExecuteStatement:
- debugger->atStatement(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), firstLine);
- return;
- case WillExecuteProgram:
- debugger->willExecuteProgram(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), firstLine);
- return;
- case DidExecuteProgram:
- debugger->didExecuteProgram(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), lastLine);
- return;
- case DidReachBreakpoint:
- debugger->didReachBreakpoint(callFrame, callFrame->codeBlock()->ownerExecutable()->sourceID(), lastLine);
- return;
- }
-}
-
-#if ENABLE(INTERPRETER)
-NEVER_INLINE ScopeChainNode* Interpreter::createExceptionScope(CallFrame* callFrame, const Instruction* vPC)
-{
- int dst = vPC[1].u.operand;
- CodeBlock* codeBlock = callFrame->codeBlock();
- Identifier& property = codeBlock->identifier(vPC[2].u.operand);
- JSValue value = callFrame->r(vPC[3].u.operand).jsValue();
- JSObject* scope = new (callFrame) JSStaticScopeObject(callFrame, property, value, DontDelete);
- callFrame->uncheckedR(dst) = JSValue(scope);
-
- return callFrame->scopeChain()->push(scope);
-}
-
-NEVER_INLINE void Interpreter::tryCachePutByID(CallFrame* callFrame, CodeBlock* codeBlock, Instruction* vPC, JSValue baseValue, const PutPropertySlot& slot)
-{
- // Recursive invocation may already have specialized this instruction.
- if (vPC[0].u.opcode != getOpcode(op_put_by_id))
- return;
-
- if (!baseValue.isCell())
- return;
-
- // Uncacheable: give up.
- if (!slot.isCacheable()) {
- vPC[0] = getOpcode(op_put_by_id_generic);
- return;
- }
-
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = baseCell->structure();
-
- if (structure->isUncacheableDictionary() || structure->typeInfo().prohibitsPropertyCaching()) {
- vPC[0] = getOpcode(op_put_by_id_generic);
- return;
- }
-
- // Cache miss: record Structure to compare against next time.
- Structure* lastStructure = vPC[4].u.structure.get();
- if (structure != lastStructure) {
- // First miss: record Structure to compare against next time.
- if (!lastStructure) {
- vPC[4].u.structure.set(callFrame->globalData(), codeBlock->ownerExecutable(), structure);
- return;
- }
-
- // Second miss: give up.
- vPC[0] = getOpcode(op_put_by_id_generic);
- return;
- }
-
- // Cache hit: Specialize instruction and ref Structures.
-
- // If baseCell != slot.base(), then baseCell must be a proxy for another object.
- if (baseCell != slot.base()) {
- vPC[0] = getOpcode(op_put_by_id_generic);
- return;
- }
-
- // Structure transition, cache transition info
- if (slot.type() == PutPropertySlot::NewProperty) {
- if (structure->isDictionary()) {
- vPC[0] = getOpcode(op_put_by_id_generic);
- return;
- }
-
- // put_by_id_transition checks the prototype chain for setters.
- normalizePrototypeChain(callFrame, baseCell);
- JSCell* owner = codeBlock->ownerExecutable();
- JSGlobalData& globalData = callFrame->globalData();
- // Get the prototype here because the call to prototypeChain could cause a
- // GC allocation, which we don't want to happen while we're in the middle of
- // initializing the union.
- StructureChain* prototypeChain = structure->prototypeChain(callFrame);
- vPC[0] = getOpcode(op_put_by_id_transition);
- vPC[4].u.structure.set(globalData, owner, structure->previousID());
- vPC[5].u.structure.set(globalData, owner, structure);
- vPC[6].u.structureChain.set(callFrame->globalData(), codeBlock->ownerExecutable(), prototypeChain);
- ASSERT(vPC[6].u.structureChain);
- vPC[7] = slot.cachedOffset();
- return;
- }
-
- vPC[0] = getOpcode(op_put_by_id_replace);
- vPC[5] = slot.cachedOffset();
-}
-
-NEVER_INLINE void Interpreter::uncachePutByID(CodeBlock*, Instruction* vPC)
-{
- vPC[0] = getOpcode(op_put_by_id);
- vPC[4] = 0;
-}
-
-NEVER_INLINE void Interpreter::tryCacheGetByID(CallFrame* callFrame, CodeBlock* codeBlock, Instruction* vPC, JSValue baseValue, const Identifier& propertyName, const PropertySlot& slot)
-{
- // Recursive invocation may already have specialized this instruction.
- if (vPC[0].u.opcode != getOpcode(op_get_by_id))
- return;
-
- // FIXME: Cache property access for immediates.
- if (!baseValue.isCell()) {
- vPC[0] = getOpcode(op_get_by_id_generic);
- return;
- }
-
- JSGlobalData* globalData = &callFrame->globalData();
- if (isJSArray(globalData, baseValue) && propertyName == callFrame->propertyNames().length) {
- vPC[0] = getOpcode(op_get_array_length);
- return;
- }
-
- if (isJSString(globalData, baseValue) && propertyName == callFrame->propertyNames().length) {
- vPC[0] = getOpcode(op_get_string_length);
- return;
- }
-
- // Uncacheable: give up.
- if (!slot.isCacheable()) {
- vPC[0] = getOpcode(op_get_by_id_generic);
- return;
- }
-
- Structure* structure = baseValue.asCell()->structure();
-
- if (structure->isUncacheableDictionary() || structure->typeInfo().prohibitsPropertyCaching()) {
- vPC[0] = getOpcode(op_get_by_id_generic);
- return;
- }
-
- // Cache miss
- Structure* lastStructure = vPC[4].u.structure.get();
- if (structure != lastStructure) {
- // First miss: record Structure to compare against next time.
- if (!lastStructure) {
- vPC[4].u.structure.set(callFrame->globalData(), codeBlock->ownerExecutable(), structure);
- return;
- }
-
- // Second miss: give up.
- vPC[0] = getOpcode(op_get_by_id_generic);
- return;
- }
-
- // Cache hit: Specialize instruction and ref Structures.
-
- if (slot.slotBase() == baseValue) {
- switch (slot.cachedPropertyType()) {
- case PropertySlot::Getter:
- vPC[0] = getOpcode(op_get_by_id_getter_self);
- vPC[5] = slot.cachedOffset();
+ debugger->callEvent(callFrame);
break;
- case PropertySlot::Custom:
- vPC[0] = getOpcode(op_get_by_id_custom_self);
- vPC[5] = slot.customGetter();
+ case WillLeaveCallFrame:
+ debugger->returnEvent(callFrame);
break;
- default:
- vPC[0] = getOpcode(op_get_by_id_self);
- vPC[5] = slot.cachedOffset();
+ case WillExecuteStatement:
+ debugger->atStatement(callFrame);
break;
- }
- return;
- }
-
- if (structure->isDictionary()) {
- vPC[0] = getOpcode(op_get_by_id_generic);
- return;
- }
-
- if (slot.slotBase() == structure->prototypeForLookup(callFrame)) {
- ASSERT(slot.slotBase().isObject());
-
- JSObject* baseObject = asObject(slot.slotBase());
- size_t offset = slot.cachedOffset();
-
- // Since we're accessing a prototype in a loop, it's a good bet that it
- // should not be treated as a dictionary.
- if (baseObject->structure()->isDictionary()) {
- baseObject->flattenDictionaryObject(callFrame->globalData());
- offset = baseObject->structure()->get(callFrame->globalData(), propertyName);
- }
-
- ASSERT(!baseObject->structure()->isUncacheableDictionary());
-
- switch (slot.cachedPropertyType()) {
- case PropertySlot::Getter:
- vPC[0] = getOpcode(op_get_by_id_getter_proto);
- vPC[6] = offset;
+ case WillExecuteProgram:
+ debugger->willExecuteProgram(callFrame);
break;
- case PropertySlot::Custom:
- vPC[0] = getOpcode(op_get_by_id_custom_proto);
- vPC[6] = slot.customGetter();
+ case DidExecuteProgram:
+ debugger->didExecuteProgram(callFrame);
break;
- default:
- vPC[0] = getOpcode(op_get_by_id_proto);
- vPC[6] = offset;
+ case DidReachBreakpoint:
+ debugger->didReachBreakpoint(callFrame);
break;
- }
- vPC[5].u.structure.set(callFrame->globalData(), codeBlock->ownerExecutable(), baseObject->structure());
- return;
- }
-
- size_t offset = slot.cachedOffset();
- size_t count = normalizePrototypeChain(callFrame, baseValue, slot.slotBase(), propertyName, offset);
- if (!count) {
- vPC[0] = getOpcode(op_get_by_id_generic);
- return;
- }
-
-
- switch (slot.cachedPropertyType()) {
- case PropertySlot::Getter:
- vPC[0] = getOpcode(op_get_by_id_getter_chain);
- vPC[7] = offset;
- break;
- case PropertySlot::Custom:
- vPC[0] = getOpcode(op_get_by_id_custom_chain);
- vPC[7] = slot.customGetter();
- break;
- default:
- vPC[0] = getOpcode(op_get_by_id_chain);
- vPC[7] = offset;
- break;
- }
- vPC[4].u.structure.set(callFrame->globalData(), codeBlock->ownerExecutable(), structure);
- vPC[5].u.structureChain.set(callFrame->globalData(), codeBlock->ownerExecutable(), structure->prototypeChain(callFrame));
- vPC[6] = count;
-}
-
-NEVER_INLINE void Interpreter::uncacheGetByID(CodeBlock*, Instruction* vPC)
-{
- vPC[0] = getOpcode(op_get_by_id);
- vPC[4] = 0;
-}
-
-#endif // ENABLE(INTERPRETER)
-
-JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFile, CallFrame* callFrame)
-{
- // One-time initialization of our address tables. We have to put this code
- // here because our labels are only in scope inside this function.
- if (UNLIKELY(flag == InitializeAndReturn)) {
- #if ENABLE(COMPUTED_GOTO_INTERPRETER)
- #define LIST_OPCODE_LABEL(id, length) &&id,
- static Opcode labels[] = { FOR_EACH_OPCODE_ID(LIST_OPCODE_LABEL) };
- for (size_t i = 0; i < WTF_ARRAY_LENGTH(labels); ++i)
- m_opcodeTable[i] = labels[i];
- #undef LIST_OPCODE_LABEL
- #endif // ENABLE(COMPUTED_GOTO_INTERPRETER)
- return JSValue();
- }
-
-#if ENABLE(JIT)
-#if ENABLE(INTERPRETER)
- // Mixing Interpreter + JIT is not supported.
- if (callFrame->globalData().canUseJIT())
-#endif
- ASSERT_NOT_REACHED();
-#endif
-
-#if !ENABLE(INTERPRETER)
- UNUSED_PARAM(registerFile);
- UNUSED_PARAM(callFrame);
- return JSValue();
-#else
-
- JSGlobalData* globalData = &callFrame->globalData();
- JSValue exceptionValue;
- HandlerInfo* handler = 0;
-
- CodeBlock* codeBlock = callFrame->codeBlock();
- Instruction* vPC = codeBlock->instructions().begin();
- Profiler** enabledProfilerReference = Profiler::enabledProfilerReference();
- unsigned tickCount = globalData->timeoutChecker.ticksUntilNextCheck();
- JSValue functionReturnValue;
-
-#define CHECK_FOR_EXCEPTION() \
- do { \
- if (UNLIKELY(globalData->exception != JSValue())) { \
- exceptionValue = globalData->exception; \
- goto vm_throw; \
- } \
- } while (0)
-
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
-
-#define CHECK_FOR_TIMEOUT() \
- if (!--tickCount) { \
- if (globalData->terminator.shouldTerminate() || globalData->timeoutChecker.didTimeOut(callFrame)) { \
- exceptionValue = jsNull(); \
- goto vm_throw; \
- } \
- tickCount = globalData->timeoutChecker.ticksUntilNextCheck(); \
- }
-
-#if ENABLE(OPCODE_SAMPLING)
- #define SAMPLE(codeBlock, vPC) m_sampler->sample(codeBlock, vPC)
-#else
- #define SAMPLE(codeBlock, vPC)
-#endif
-
-#if ENABLE(COMPUTED_GOTO_INTERPRETER)
- #define NEXT_INSTRUCTION() SAMPLE(codeBlock, vPC); goto *vPC->u.opcode
-#if ENABLE(OPCODE_STATS)
- #define DEFINE_OPCODE(opcode) opcode: OpcodeStats::recordInstruction(opcode);
-#else
- #define DEFINE_OPCODE(opcode) opcode:
-#endif
- NEXT_INSTRUCTION();
-#else
- #define NEXT_INSTRUCTION() SAMPLE(codeBlock, vPC); goto interpreterLoopStart
-#if ENABLE(OPCODE_STATS)
- #define DEFINE_OPCODE(opcode) case opcode: OpcodeStats::recordInstruction(opcode);
-#else
- #define DEFINE_OPCODE(opcode) case opcode:
-#endif
- while (1) { // iterator loop begins
- interpreterLoopStart:;
- switch (vPC->u.opcode)
-#endif
- {
- DEFINE_OPCODE(op_new_object) {
- /* new_object dst(r)
-
- Constructs a new empty Object instance using the original
- constructor, and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- callFrame->uncheckedR(dst) = JSValue(constructEmptyObject(callFrame));
-
- vPC += OPCODE_LENGTH(op_new_object);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_new_array) {
- /* new_array dst(r) firstArg(r) argCount(n)
-
- Constructs a new Array instance using the original
- constructor, and puts the result in register dst.
- The array will contain argCount elements with values
- taken from registers starting at register firstArg.
- */
- int dst = vPC[1].u.operand;
- int firstArg = vPC[2].u.operand;
- int argCount = vPC[3].u.operand;
- ArgList args(callFrame->registers() + firstArg, argCount);
- callFrame->uncheckedR(dst) = JSValue(constructArray(callFrame, args));
-
- vPC += OPCODE_LENGTH(op_new_array);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_new_array_buffer) {
- /* new_array_buffer dst(r) index(n) argCount(n)
-
- Constructs a new Array instance using the original
- constructor, and puts the result in register dst.
- The array be initialized with the values from constantBuffer[index]
- */
- int dst = vPC[1].u.operand;
- int firstArg = vPC[2].u.operand;
- int argCount = vPC[3].u.operand;
- ArgList args(codeBlock->constantBuffer(firstArg), argCount);
- callFrame->uncheckedR(dst) = JSValue(constructArray(callFrame, args));
-
- vPC += OPCODE_LENGTH(op_new_array);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_new_regexp) {
- /* new_regexp dst(r) regExp(re)
-
- Constructs a new RegExp instance using the original
- constructor from regexp regExp, and puts the result in
- register dst.
- */
- int dst = vPC[1].u.operand;
- RegExp* regExp = codeBlock->regexp(vPC[2].u.operand);
- if (!regExp->isValid()) {
- exceptionValue = createSyntaxError(callFrame, "Invalid flags supplied to RegExp constructor.");
- goto vm_throw;
- }
- callFrame->uncheckedR(dst) = JSValue(new (globalData) RegExpObject(callFrame->lexicalGlobalObject(), callFrame->scopeChain()->globalObject->regExpStructure(), regExp));
-
- vPC += OPCODE_LENGTH(op_new_regexp);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_mov) {
- /* mov dst(r) src(r)
-
- Copies register src to register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
-
- callFrame->uncheckedR(dst) = callFrame->r(src);
-
- vPC += OPCODE_LENGTH(op_mov);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_eq) {
- /* eq dst(r) src1(r) src2(r)
-
- Checks whether register src1 and register src2 are equal,
- as with the ECMAScript '==' operator, and puts the result
- as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsBoolean(src1.asInt32() == src2.asInt32());
- else {
- JSValue result = jsBoolean(JSValue::equalSlowCase(callFrame, src1, src2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_eq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_eq_null) {
- /* eq_null dst(r) src(r)
-
- Checks whether register src is null, as with the ECMAScript '!='
- operator, and puts the result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
-
- if (src.isUndefinedOrNull()) {
- callFrame->uncheckedR(dst) = jsBoolean(true);
- vPC += OPCODE_LENGTH(op_eq_null);
- NEXT_INSTRUCTION();
- }
-
- callFrame->uncheckedR(dst) = jsBoolean(src.isCell() && src.asCell()->structure()->typeInfo().masqueradesAsUndefined());
- vPC += OPCODE_LENGTH(op_eq_null);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_neq) {
- /* neq dst(r) src1(r) src2(r)
-
- Checks whether register src1 and register src2 are not
- equal, as with the ECMAScript '!=' operator, and puts the
- result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsBoolean(src1.asInt32() != src2.asInt32());
- else {
- JSValue result = jsBoolean(!JSValue::equalSlowCase(callFrame, src1, src2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_neq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_neq_null) {
- /* neq_null dst(r) src(r)
-
- Checks whether register src is not null, as with the ECMAScript '!='
- operator, and puts the result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
-
- if (src.isUndefinedOrNull()) {
- callFrame->uncheckedR(dst) = jsBoolean(false);
- vPC += OPCODE_LENGTH(op_neq_null);
- NEXT_INSTRUCTION();
- }
-
- callFrame->uncheckedR(dst) = jsBoolean(!src.isCell() || !src.asCell()->structure()->typeInfo().masqueradesAsUndefined());
- vPC += OPCODE_LENGTH(op_neq_null);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_stricteq) {
- /* stricteq dst(r) src1(r) src2(r)
-
- Checks whether register src1 and register src2 are strictly
- equal, as with the ECMAScript '===' operator, and puts the
- result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- bool result = JSValue::strictEqual(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
-
- vPC += OPCODE_LENGTH(op_stricteq);
- NEXT_INSTRUCTION();
}
- DEFINE_OPCODE(op_nstricteq) {
- /* nstricteq dst(r) src1(r) src2(r)
-
- Checks whether register src1 and register src2 are not
- strictly equal, as with the ECMAScript '!==' operator, and
- puts the result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- bool result = !JSValue::strictEqual(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
-
- vPC += OPCODE_LENGTH(op_nstricteq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_less) {
- /* less dst(r) src1(r) src2(r)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and puts the result as
- a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- JSValue result = jsBoolean(jsLess(callFrame, src1, src2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_less);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_lesseq) {
- /* lesseq dst(r) src1(r) src2(r)
-
- Checks whether register src1 is less than or equal to
- register src2, as with the ECMAScript '<=' operator, and
- puts the result as a boolean in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- JSValue result = jsBoolean(jsLessEq(callFrame, src1, src2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_lesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_pre_inc) {
- /* pre_inc srcDst(r)
-
- Converts register srcDst to number, adds one, and puts the result
- back in register srcDst.
- */
- int srcDst = vPC[1].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() < INT_MAX)
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() + 1);
- else {
- JSValue result = jsNumber(v.toNumber(callFrame) + 1);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_pre_inc);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_pre_dec) {
- /* pre_dec srcDst(r)
-
- Converts register srcDst to number, subtracts one, and puts the result
- back in register srcDst.
- */
- int srcDst = vPC[1].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() > INT_MIN)
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() - 1);
- else {
- JSValue result = jsNumber(v.toNumber(callFrame) - 1);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_pre_dec);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_post_inc) {
- /* post_inc dst(r) srcDst(r)
-
- Converts register srcDst to number. The number itself is
- written to register dst, and the number plus one is written
- back to register srcDst.
- */
- int dst = vPC[1].u.operand;
- int srcDst = vPC[2].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() < INT_MAX) {
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() + 1);
- callFrame->uncheckedR(dst) = v;
- } else {
- JSValue number = callFrame->r(srcDst).jsValue().toJSNumber(callFrame);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = jsNumber(number.uncheckedGetNumber() + 1);
- callFrame->uncheckedR(dst) = number;
- }
-
- vPC += OPCODE_LENGTH(op_post_inc);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_post_dec) {
- /* post_dec dst(r) srcDst(r)
-
- Converts register srcDst to number. The number itself is
- written to register dst, and the number minus one is written
- back to register srcDst.
- */
- int dst = vPC[1].u.operand;
- int srcDst = vPC[2].u.operand;
- JSValue v = callFrame->r(srcDst).jsValue();
- if (v.isInt32() && v.asInt32() > INT_MIN) {
- callFrame->uncheckedR(srcDst) = jsNumber(v.asInt32() - 1);
- callFrame->uncheckedR(dst) = v;
- } else {
- JSValue number = callFrame->r(srcDst).jsValue().toJSNumber(callFrame);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(srcDst) = jsNumber(number.uncheckedGetNumber() - 1);
- callFrame->uncheckedR(dst) = number;
- }
-
- vPC += OPCODE_LENGTH(op_post_dec);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_to_jsnumber) {
- /* to_jsnumber dst(r) src(r)
-
- Converts register src to number, and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
-
- JSValue srcVal = callFrame->r(src).jsValue();
-
- if (LIKELY(srcVal.isNumber()))
- callFrame->uncheckedR(dst) = callFrame->r(src);
- else {
- JSValue result = srcVal.toJSNumber(callFrame);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_to_jsnumber);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_negate) {
- /* negate dst(r) src(r)
-
- Converts register src to number, negates it, and puts the
- result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
- if (src.isInt32() && (src.asInt32() & 0x7fffffff)) // non-zero and no overflow
- callFrame->uncheckedR(dst) = jsNumber(-src.asInt32());
- else {
- JSValue result = jsNumber(-src.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_negate);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_add) {
- /* add dst(r) src1(r) src2(r)
-
- Adds register src1 and register src2, and puts the result
- in register dst. (JS add may be string concatenation or
- numeric add, depending on the types of the operands.)
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() + src2.asInt32());
- else {
- JSValue result = jsAdd(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
- vPC += OPCODE_LENGTH(op_add);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_mul) {
- /* mul dst(r) src1(r) src2(r)
-
- Multiplies register src1 and register src2 (converted to
- numbers), and puts the product in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | src2.asInt32() >> 15)) // no overflow
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() * src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toNumber(callFrame) * src2.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_mul);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_div) {
- /* div dst(r) dividend(r) divisor(r)
-
- Divides register dividend (converted to number) by the
- register divisor (converted to number), and puts the
- quotient in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue dividend = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue divisor = callFrame->r(vPC[3].u.operand).jsValue();
-
- JSValue result = jsNumber(dividend.toNumber(callFrame) / divisor.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_div);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_mod) {
- /* mod dst(r) dividend(r) divisor(r)
-
- Divides register dividend (converted to number) by
- register divisor (converted to number), and puts the
- remainder in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue dividend = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue divisor = callFrame->r(vPC[3].u.operand).jsValue();
-
- if (dividend.isInt32() && divisor.isInt32() && divisor.asInt32() != 0) {
- JSValue result = jsNumber(dividend.asInt32() % divisor.asInt32());
- ASSERT(result);
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_mod);
- NEXT_INSTRUCTION();
- }
-
- // Conversion to double must happen outside the call to fmod since the
- // order of argument evaluation is not guaranteed.
- double d1 = dividend.toNumber(callFrame);
- double d2 = divisor.toNumber(callFrame);
- JSValue result = jsNumber(fmod(d1, d2));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_mod);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_sub) {
- /* sub dst(r) src1(r) src2(r)
-
- Subtracts register src2 (converted to number) from register
- src1 (converted to number), and puts the difference in
- register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() - src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toNumber(callFrame) - src2.toNumber(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
- vPC += OPCODE_LENGTH(op_sub);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_lshift) {
- /* lshift dst(r) val(r) shift(r)
-
- Performs left shift of register val (converted to int32) by
- register shift (converted to uint32), and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
-
- if (val.isInt32() && shift.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(val.asInt32() << (shift.asInt32() & 0x1f));
- else {
- JSValue result = jsNumber((val.toInt32(callFrame)) << (shift.toUInt32(callFrame) & 0x1f));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_lshift);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_rshift) {
- /* rshift dst(r) val(r) shift(r)
-
- Performs arithmetic right shift of register val (converted
- to int32) by register shift (converted to
- uint32), and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
-
- if (val.isInt32() && shift.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(val.asInt32() >> (shift.asInt32() & 0x1f));
- else {
- JSValue result = jsNumber((val.toInt32(callFrame)) >> (shift.toUInt32(callFrame) & 0x1f));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_rshift);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_urshift) {
- /* rshift dst(r) val(r) shift(r)
-
- Performs logical right shift of register val (converted
- to uint32) by register shift (converted to
- uint32), and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue val = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue shift = callFrame->r(vPC[3].u.operand).jsValue();
- if (val.isUInt32() && shift.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(val.asInt32() >> (shift.asInt32() & 0x1f));
- else {
- JSValue result = jsNumber((val.toUInt32(callFrame)) >> (shift.toUInt32(callFrame) & 0x1f));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_urshift);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitand) {
- /* bitand dst(r) src1(r) src2(r)
-
- Computes bitwise AND of register src1 (converted to int32)
- and register src2 (converted to int32), and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() & src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toInt32(callFrame) & src2.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_bitand);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitxor) {
- /* bitxor dst(r) src1(r) src2(r)
-
- Computes bitwise XOR of register src1 (converted to int32)
- and register src2 (converted to int32), and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() ^ src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toInt32(callFrame) ^ src2.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_bitxor);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitor) {
- /* bitor dst(r) src1(r) src2(r)
-
- Computes bitwise OR of register src1 (converted to int32)
- and register src2 (converted to int32), and puts the
- result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
- if (src1.isInt32() && src2.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(src1.asInt32() | src2.asInt32());
- else {
- JSValue result = jsNumber(src1.toInt32(callFrame) | src2.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
-
- vPC += OPCODE_LENGTH(op_bitor);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_bitnot) {
- /* bitnot dst(r) src(r)
-
- Computes bitwise NOT of register src1 (converted to int32),
- and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
- if (src.isInt32())
- callFrame->uncheckedR(dst) = jsNumber(~src.asInt32());
- else {
- JSValue result = jsNumber(~src.toInt32(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- }
- vPC += OPCODE_LENGTH(op_bitnot);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_not) {
- /* not dst(r) src(r)
-
- Computes logical NOT of register src (converted to
- boolean), and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- JSValue result = jsBoolean(!callFrame->r(src).jsValue().toBoolean(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
-
- vPC += OPCODE_LENGTH(op_not);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_check_has_instance) {
- /* check_has_instance constructor(r)
-
- Check 'constructor' is an object with the internal property
- [HasInstance] (i.e. is a function ... *shakes head sadly at
- JSC API*). Raises an exception if register constructor is not
- an valid parameter for instanceof.
- */
- int base = vPC[1].u.operand;
- JSValue baseVal = callFrame->r(base).jsValue();
-
- if (isInvalidParamForInstanceOf(callFrame, baseVal, exceptionValue))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_check_has_instance);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_instanceof) {
- /* instanceof dst(r) value(r) constructor(r) constructorProto(r)
-
- Tests whether register value is an instance of register
- constructor, and puts the boolean result in register
- dst. Register constructorProto must contain the "prototype"
- property (not the actual prototype) of the object in
- register constructor. This lookup is separated so that
- polymorphic inline caching can apply.
-
- Raises an exception if register constructor is not an
- object.
- */
- int dst = vPC[1].u.operand;
- int value = vPC[2].u.operand;
- int base = vPC[3].u.operand;
- int baseProto = vPC[4].u.operand;
-
- JSValue baseVal = callFrame->r(base).jsValue();
-
- ASSERT(!isInvalidParamForInstanceOf(callFrame, baseVal, exceptionValue));
-
- bool result = asObject(baseVal)->hasInstance(callFrame, callFrame->r(value).jsValue(), callFrame->r(baseProto).jsValue());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
-
- vPC += OPCODE_LENGTH(op_instanceof);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_typeof) {
- /* typeof dst(r) src(r)
-
- Determines the type string for src according to ECMAScript
- rules, and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = JSValue(jsTypeStringForValue(callFrame, callFrame->r(src).jsValue()));
-
- vPC += OPCODE_LENGTH(op_typeof);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_undefined) {
- /* is_undefined dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "undefined", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- JSValue v = callFrame->r(src).jsValue();
- callFrame->uncheckedR(dst) = jsBoolean(v.isCell() ? v.asCell()->structure()->typeInfo().masqueradesAsUndefined() : v.isUndefined());
-
- vPC += OPCODE_LENGTH(op_is_undefined);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_boolean) {
- /* is_boolean dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "boolean", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(callFrame->r(src).jsValue().isBoolean());
-
- vPC += OPCODE_LENGTH(op_is_boolean);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_number) {
- /* is_number dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "number", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(callFrame->r(src).jsValue().isNumber());
-
- vPC += OPCODE_LENGTH(op_is_number);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_string) {
- /* is_string dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "string", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(callFrame->r(src).jsValue().isString());
-
- vPC += OPCODE_LENGTH(op_is_string);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_object) {
- /* is_object dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "object", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(jsIsObjectType(callFrame->r(src).jsValue()));
-
- vPC += OPCODE_LENGTH(op_is_object);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_is_function) {
- /* is_function dst(r) src(r)
-
- Determines whether the type string for src according to
- the ECMAScript rules is "function", and puts the result
- in register dst.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- callFrame->uncheckedR(dst) = jsBoolean(jsIsFunctionType(callFrame->r(src).jsValue()));
-
- vPC += OPCODE_LENGTH(op_is_function);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_in) {
- /* in dst(r) property(r) base(r)
-
- Tests whether register base has a property named register
- property, and puts the boolean result in register dst.
-
- Raises an exception if register constructor is not an
- object.
- */
- int dst = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int base = vPC[3].u.operand;
-
- JSValue baseVal = callFrame->r(base).jsValue();
- if (isInvalidParamForIn(callFrame, baseVal, exceptionValue))
- goto vm_throw;
-
- JSObject* baseObj = asObject(baseVal);
-
- JSValue propName = callFrame->r(property).jsValue();
-
- uint32_t i;
- if (propName.getUInt32(i))
- callFrame->uncheckedR(dst) = jsBoolean(baseObj->hasProperty(callFrame, i));
- else {
- Identifier property(callFrame, propName.toString(callFrame));
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(baseObj->hasProperty(callFrame, property));
- }
-
- vPC += OPCODE_LENGTH(op_in);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve) {
- /* resolve dst(r) property(id)
-
- Looks up the property named by identifier property in the
- scope chain, and writes the resulting value to register
- dst. If the property is not found, raises an exception.
- */
- if (UNLIKELY(!resolve(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_skip) {
- /* resolve_skip dst(r) property(id) skip(n)
-
- Looks up the property named by identifier property in the
- scope chain skipping the top 'skip' levels, and writes the resulting
- value to register dst. If the property is not found, raises an exception.
- */
- if (UNLIKELY(!resolveSkip(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_skip);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_global) {
- /* resolve_skip dst(r) globalObject(c) property(id) structure(sID) offset(n)
-
- Performs a dynamic property lookup for the given property, on the provided
- global object. If structure matches the Structure of the global then perform
- a fast lookup using the case offset, otherwise fall back to a full resolve and
- cache the new structure and offset
- */
- if (UNLIKELY(!resolveGlobal(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_global);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_global_dynamic) {
- /* resolve_skip dst(r) globalObject(c) property(id) structure(sID) offset(n), depth(n)
-
- Performs a dynamic property lookup for the given property, on the provided
- global object. If structure matches the Structure of the global then perform
- a fast lookup using the case offset, otherwise fall back to a full resolve and
- cache the new structure and offset.
-
- This walks through n levels of the scope chain to verify that none of those levels
- in the scope chain include dynamically added properties.
- */
- if (UNLIKELY(!resolveGlobalDynamic(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_global_dynamic);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_global_var) {
- /* get_global_var dst(r) globalObject(c) index(n)
-
- Gets the global var at global slot index and places it in register dst.
- */
- int dst = vPC[1].u.operand;
- JSGlobalObject* scope = codeBlock->globalObject();
- ASSERT(scope->isGlobalObject());
- int index = vPC[2].u.operand;
-
- callFrame->uncheckedR(dst) = scope->registerAt(index).get();
- vPC += OPCODE_LENGTH(op_get_global_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_global_var) {
- /* put_global_var globalObject(c) index(n) value(r)
-
- Puts value into global slot index.
- */
- JSGlobalObject* scope = codeBlock->globalObject();
- ASSERT(scope->isGlobalObject());
- int index = vPC[1].u.operand;
- int value = vPC[2].u.operand;
-
- scope->registerAt(index).set(*globalData, scope, callFrame->r(value).jsValue());
- vPC += OPCODE_LENGTH(op_put_global_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_scoped_var) {
- /* get_scoped_var dst(r) index(n) skip(n)
-
- Loads the contents of the index-th local from the scope skip nodes from
- the top of the scope chain, and places it in register dst.
- */
- int dst = vPC[1].u.operand;
- int index = 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);
- ASSERT(codeBlock == callFrame->codeBlock());
- bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
- ASSERT(skip || !checkTopLevel);
- if (checkTopLevel && skip--) {
- if (callFrame->r(codeBlock->activationRegister()).jsValue())
- ++iter;
- }
- while (skip--) {
- ++iter;
- ASSERT(iter != end);
- }
- ASSERT((*iter)->isVariableObject());
- JSVariableObject* scope = static_cast<JSVariableObject*>(iter->get());
- callFrame->uncheckedR(dst) = scope->registerAt(index).get();
- ASSERT(callFrame->r(dst).jsValue());
- vPC += OPCODE_LENGTH(op_get_scoped_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_scoped_var) {
- /* put_scoped_var index(n) skip(n) value(r)
-
- */
- int index = vPC[1].u.operand;
- int skip = vPC[2].u.operand;
- int value = vPC[3].u.operand;
-
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- ScopeChainIterator iter = scopeChain->begin();
- ScopeChainIterator end = scopeChain->end();
- ASSERT(codeBlock == callFrame->codeBlock());
- ASSERT(iter != end);
- bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
- ASSERT(skip || !checkTopLevel);
- if (checkTopLevel && skip--) {
- if (callFrame->r(codeBlock->activationRegister()).jsValue())
- ++iter;
- }
- while (skip--) {
- ++iter;
- ASSERT(iter != end);
- }
-
- ASSERT((*iter)->isVariableObject());
- JSVariableObject* scope = static_cast<JSVariableObject*>(iter->get());
- ASSERT(callFrame->r(value).jsValue());
- scope->registerAt(index).set(*globalData, scope, callFrame->r(value).jsValue());
- vPC += OPCODE_LENGTH(op_put_scoped_var);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_base) {
- /* resolve_base dst(r) property(id) isStrict(bool)
-
- Searches the scope chain for an object containing
- identifier property, and if one is found, writes it to
- register dst. If none is found and isStrict is false, the
- outermost scope (which will be the global object) is
- stored in register dst.
- */
- resolveBase(callFrame, vPC);
- CHECK_FOR_EXCEPTION();
-
- vPC += OPCODE_LENGTH(op_resolve_base);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_ensure_property_exists) {
- /* ensure_property_exists base(r) property(id)
-
- Throws an exception if property does not exist on base
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- JSValue baseVal = callFrame->r(base).jsValue();
- JSObject* baseObject = asObject(baseVal);
- PropertySlot slot(baseVal);
- if (!baseObject->getPropertySlot(callFrame, ident, slot)) {
- exceptionValue = createErrorForInvalidGlobalAssignment(callFrame, ident.ustring());
- goto vm_throw;
- }
-
- vPC += OPCODE_LENGTH(op_ensure_property_exists);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_resolve_with_base) {
- /* resolve_with_base baseDst(r) propDst(r) property(id)
-
- Searches the scope chain for an object containing
- identifier property, and if one is found, writes it to
- register srcDst, and the retrieved property value to register
- propDst. If the property is not found, raises an exception.
-
- This is more efficient than doing resolve_base followed by
- resolve, or resolve_base followed by get_by_id, as it
- avoids duplicate hash lookups.
- */
- if (UNLIKELY(!resolveBaseAndProperty(callFrame, vPC, exceptionValue)))
- goto vm_throw;
-
- vPC += OPCODE_LENGTH(op_resolve_with_base);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id) {
- /* get_by_id dst(r) base(r) property(id) structure(sID) nop(n) nop(n) nop(n)
-
- Generic property access: Gets the property named by identifier
- property from the value base, and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- Identifier& ident = codeBlock->identifier(property);
- JSValue baseValue = callFrame->r(base).jsValue();
- PropertySlot slot(baseValue);
- JSValue result = baseValue.get(callFrame, ident, slot);
- CHECK_FOR_EXCEPTION();
-
- tryCacheGetByID(callFrame, codeBlock, vPC, baseValue, ident, slot);
-
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_self) {
- /* op_get_by_id_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
-
- Cached property access: Attempts to get a cached property from the
- value base. If the cache misses, op_get_by_id_self reverts to
- op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int dst = vPC[1].u.operand;
- int offset = vPC[5].u.operand;
-
- ASSERT(baseObject->get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
- callFrame->uncheckedR(dst) = JSValue(baseObject->getDirectOffset(offset));
-
- vPC += OPCODE_LENGTH(op_get_by_id_self);
- NEXT_INSTRUCTION();
- }
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_proto) {
- /* op_get_by_id_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
-
- Cached property access: Attempts to get a cached property from the
- value base's prototype. If the cache misses, op_get_by_id_proto
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(structure->prototypeForLookup(callFrame).isObject());
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
- Structure* prototypeStructure = vPC[5].u.structure.get();
-
- if (LIKELY(protoObject->structure() == prototypeStructure)) {
- int dst = vPC[1].u.operand;
- int offset = vPC[6].u.operand;
-
- ASSERT(protoObject->get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == protoObject->getDirectOffset(offset));
- ASSERT(baseValue.get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == protoObject->getDirectOffset(offset));
- callFrame->uncheckedR(dst) = JSValue(protoObject->getDirectOffset(offset));
-
- vPC += OPCODE_LENGTH(op_get_by_id_proto);
- NEXT_INSTRUCTION();
- }
- }
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_getter_proto);
-#endif
- DEFINE_OPCODE(op_get_by_id_getter_proto) {
- /* op_get_by_id_getter_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
-
- Cached property access: Attempts to get a cached getter property from the
- value base's prototype. If the cache misses, op_get_by_id_getter_proto
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(structure->prototypeForLookup(callFrame).isObject());
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
- Structure* prototypeStructure = vPC[5].u.structure.get();
-
- if (LIKELY(protoObject->structure() == prototypeStructure)) {
- int dst = vPC[1].u.operand;
- int offset = vPC[6].u.operand;
- if (GetterSetter* getterSetter = asGetterSetter(protoObject->getDirectOffset(offset).asCell())) {
- JSObject* getter = getterSetter->getter();
- CallData callData;
- CallType callType = getter->getCallData(callData);
- JSValue result = call(callFrame, getter, callType, callData, asObject(baseCell), ArgList());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsUndefined();
- vPC += OPCODE_LENGTH(op_get_by_id_getter_proto);
- NEXT_INSTRUCTION();
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_getter_proto:
-#endif
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_custom_proto);
-#endif
- DEFINE_OPCODE(op_get_by_id_custom_proto) {
- /* op_get_by_id_custom_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
-
- Cached property access: Attempts to use a cached named property getter
- from the value base's prototype. If the cache misses, op_get_by_id_custom_proto
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(structure->prototypeForLookup(callFrame).isObject());
- JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
- Structure* prototypeStructure = vPC[5].u.structure.get();
-
- if (LIKELY(protoObject->structure() == prototypeStructure)) {
- int dst = vPC[1].u.operand;
- int property = vPC[3].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- PropertySlot::GetValueFunc getter = vPC[6].u.getterFunc;
- JSValue result = getter(callFrame, protoObject, ident);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_custom_proto);
- NEXT_INSTRUCTION();
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_custom_proto:
-#endif
- DEFINE_OPCODE(op_get_by_id_self_list) {
- // Polymorphic self access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_self_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_proto_list) {
- // Polymorphic prototype access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_getter_self_list) {
- // Polymorphic self access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_self_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_getter_proto_list) {
- // Polymorphic prototype access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_custom_self_list) {
- // Polymorphic self access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_custom_self_list);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_id_custom_proto_list) {
- // Polymorphic prototype access caching currently only supported when JITting.
- ASSERT_NOT_REACHED();
- // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
- vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_get_by_id_chain);
-#endif
- DEFINE_OPCODE(op_get_by_id_chain) {
- /* op_get_by_id_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
-
- Cached property access: Attempts to get a cached property from the
- value base's prototype chain. If the cache misses, op_get_by_id_chain
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- WriteBarrier<Structure>* it = vPC[5].u.structureChain->head();
- size_t count = vPC[6].u.operand;
- WriteBarrier<Structure>* end = it + count;
-
- while (true) {
- JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
-
- if (UNLIKELY(baseObject->structure() != (*it).get()))
- break;
-
- if (++it == end) {
- int dst = vPC[1].u.operand;
- int offset = vPC[7].u.operand;
-
- ASSERT(baseObject->get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
- ASSERT(baseValue.get(callFrame, codeBlock->identifier(vPC[3].u.operand)) == baseObject->getDirectOffset(offset));
- callFrame->uncheckedR(dst) = JSValue(baseObject->getDirectOffset(offset));
-
- vPC += OPCODE_LENGTH(op_get_by_id_chain);
- NEXT_INSTRUCTION();
- }
-
- // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
- baseCell = baseObject;
- }
- }
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_get_by_id_chain:
- goto *(&&skip_id_getter_self);
-#endif
- DEFINE_OPCODE(op_get_by_id_getter_self) {
- /* op_get_by_id_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
-
- Cached property access: Attempts to get a cached property from the
- value base. If the cache misses, op_get_by_id_getter_self reverts to
- op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int dst = vPC[1].u.operand;
- int offset = vPC[5].u.operand;
-
- if (GetterSetter* getterSetter = asGetterSetter(baseObject->getDirectOffset(offset).asCell())) {
- JSObject* getter = getterSetter->getter();
- CallData callData;
- CallType callType = getter->getCallData(callData);
- JSValue result = call(callFrame, getter, callType, callData, baseObject, ArgList());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsUndefined();
-
- vPC += OPCODE_LENGTH(op_get_by_id_getter_self);
- NEXT_INSTRUCTION();
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_getter_self:
-#endif
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_custom_self);
-#endif
- DEFINE_OPCODE(op_get_by_id_custom_self) {
- /* op_get_by_id_custom_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
-
- Cached property access: Attempts to use a cached named property getter
- from the value base. If the cache misses, op_get_by_id_custom_self reverts to
- op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- int dst = vPC[1].u.operand;
- int property = vPC[3].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- PropertySlot::GetValueFunc getter = vPC[5].u.getterFunc;
- JSValue result = getter(callFrame, baseValue, ident);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_custom_self);
- NEXT_INSTRUCTION();
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
-skip_id_custom_self:
-#endif
- DEFINE_OPCODE(op_get_by_id_generic) {
- /* op_get_by_id_generic dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
-
- Generic property access: Gets the property named by identifier
- property from the value base, and puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- Identifier& ident = codeBlock->identifier(property);
- JSValue baseValue = callFrame->r(base).jsValue();
- PropertySlot slot(baseValue);
- JSValue result = baseValue.get(callFrame, ident, slot);
- CHECK_FOR_EXCEPTION();
-
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_generic);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_getter_chain);
-#endif
- DEFINE_OPCODE(op_get_by_id_getter_chain) {
- /* op_get_by_id_getter_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
-
- Cached property access: Attempts to get a cached property from the
- value base's prototype chain. If the cache misses, op_get_by_id_getter_chain
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- WriteBarrier<Structure>* it = vPC[5].u.structureChain->head();
- size_t count = vPC[6].u.operand;
- WriteBarrier<Structure>* end = it + count;
-
- while (true) {
- JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
-
- if (UNLIKELY(baseObject->structure() != (*it).get()))
- break;
-
- if (++it == end) {
- int dst = vPC[1].u.operand;
- int offset = vPC[7].u.operand;
- if (GetterSetter* getterSetter = asGetterSetter(baseObject->getDirectOffset(offset).asCell())) {
- JSObject* getter = getterSetter->getter();
- CallData callData;
- CallType callType = getter->getCallData(callData);
- JSValue result = call(callFrame, getter, callType, callData, baseValue, ArgList());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsUndefined();
- vPC += OPCODE_LENGTH(op_get_by_id_getter_chain);
- NEXT_INSTRUCTION();
- }
-
- // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
- baseCell = baseObject;
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_getter_chain:
-#endif
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- goto *(&&skip_id_custom_chain);
-#endif
- DEFINE_OPCODE(op_get_by_id_custom_chain) {
- /* op_get_by_id_custom_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
-
- Cached property access: Attempts to use a cached named property getter on the
- value base's prototype chain. If the cache misses, op_get_by_id_custom_chain
- reverts to op_get_by_id.
- */
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- WriteBarrier<Structure>* it = vPC[5].u.structureChain->head();
- size_t count = vPC[6].u.operand;
- WriteBarrier<Structure>* end = it + count;
-
- while (true) {
- JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
-
- if (UNLIKELY(baseObject->structure() != (*it).get()))
- break;
-
- if (++it == end) {
- int dst = vPC[1].u.operand;
- int property = vPC[3].u.operand;
- Identifier& ident = codeBlock->identifier(property);
-
- PropertySlot::GetValueFunc getter = vPC[7].u.getterFunc;
- JSValue result = getter(callFrame, baseObject, ident);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_id_custom_chain);
- NEXT_INSTRUCTION();
- }
-
- // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
- baseCell = baseObject;
- }
- }
- }
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_id_custom_chain:
- goto *(&&skip_get_array_length);
-#endif
- DEFINE_OPCODE(op_get_array_length) {
- /* op_get_array_length dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
-
- Cached property access: Gets the length of the array in register base,
- and puts the result in register dst. If register base does not hold
- an array, op_get_array_length reverts to op_get_by_id.
- */
-
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
- if (LIKELY(isJSArray(globalData, baseValue))) {
- int dst = vPC[1].u.operand;
- callFrame->uncheckedR(dst) = jsNumber(asArray(baseValue)->length());
- vPC += OPCODE_LENGTH(op_get_array_length);
- NEXT_INSTRUCTION();
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_get_array_length:
- goto *(&&skip_get_string_length);
-#endif
- DEFINE_OPCODE(op_get_string_length) {
- /* op_get_string_length dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
-
- Cached property access: Gets the length of the string in register base,
- and puts the result in register dst. If register base does not hold
- a string, op_get_string_length reverts to op_get_by_id.
- */
-
- int base = vPC[2].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
- if (LIKELY(isJSString(globalData, baseValue))) {
- int dst = vPC[1].u.operand;
- callFrame->uncheckedR(dst) = jsNumber(asString(baseValue)->length());
- vPC += OPCODE_LENGTH(op_get_string_length);
- NEXT_INSTRUCTION();
- }
-
- uncacheGetByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_get_string_length:
- goto *(&&skip_put_by_id);
-#endif
- DEFINE_OPCODE(op_put_by_id) {
- /* put_by_id base(r) property(id) value(r) nop(n) nop(n) nop(n) nop(n) direct(b)
-
- Generic property access: Sets the property named by identifier
- property, belonging to register base, to register value.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
-
- The "direct" flag should only be set this put_by_id is to initialize
- an object literal.
- */
-
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
- int direct = vPC[8].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- Identifier& ident = codeBlock->identifier(property);
- PutPropertySlot slot(codeBlock->isStrictMode());
- if (direct) {
- baseValue.putDirect(callFrame, ident, callFrame->r(value).jsValue(), slot);
- ASSERT(slot.base() == baseValue);
- } else
- baseValue.put(callFrame, ident, callFrame->r(value).jsValue(), slot);
- CHECK_FOR_EXCEPTION();
-
- tryCachePutByID(callFrame, codeBlock, vPC, baseValue, slot);
-
- vPC += OPCODE_LENGTH(op_put_by_id);
- NEXT_INSTRUCTION();
- }
-#if USE(GCC_COMPUTED_GOTO_WORKAROUND)
- skip_put_by_id:
-#endif
- DEFINE_OPCODE(op_put_by_id_transition) {
- /* op_put_by_id_transition base(r) property(id) value(r) oldStructure(sID) newStructure(sID) structureChain(chain) offset(n) direct(b)
-
- Cached property access: Attempts to set a new property with a cached transition
- property named by identifier property, belonging to register base,
- to register value. If the cache misses, op_put_by_id_transition
- reverts to op_put_by_id_generic.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* oldStructure = vPC[4].u.structure.get();
- Structure* newStructure = vPC[5].u.structure.get();
-
- if (LIKELY(baseCell->structure() == oldStructure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int direct = vPC[8].u.operand;
-
- if (!direct) {
- WriteBarrier<Structure>* it = vPC[6].u.structureChain->head();
-
- JSValue proto = baseObject->structure()->prototypeForLookup(callFrame);
- while (!proto.isNull()) {
- if (UNLIKELY(asObject(proto)->structure() != (*it).get())) {
- uncachePutByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- ++it;
- proto = asObject(proto)->structure()->prototypeForLookup(callFrame);
- }
- }
- baseObject->transitionTo(*globalData, newStructure);
-
- int value = vPC[3].u.operand;
- unsigned offset = vPC[7].u.operand;
- ASSERT(baseObject->offsetForLocation(baseObject->getDirectLocation(*globalData, codeBlock->identifier(vPC[2].u.operand))) == offset);
- baseObject->putDirectOffset(callFrame->globalData(), offset, callFrame->r(value).jsValue());
-
- vPC += OPCODE_LENGTH(op_put_by_id_transition);
- NEXT_INSTRUCTION();
- }
- }
-
- uncachePutByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_id_replace) {
- /* op_put_by_id_replace base(r) property(id) value(r) structure(sID) offset(n) nop(n) nop(n) direct(b)
-
- Cached property access: Attempts to set a pre-existing, cached
- property named by identifier property, belonging to register base,
- to register value. If the cache misses, op_put_by_id_replace
- reverts to op_put_by_id.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- JSValue baseValue = callFrame->r(base).jsValue();
-
- if (LIKELY(baseValue.isCell())) {
- JSCell* baseCell = baseValue.asCell();
- Structure* structure = vPC[4].u.structure.get();
-
- if (LIKELY(baseCell->structure() == structure)) {
- ASSERT(baseCell->isObject());
- JSObject* baseObject = asObject(baseCell);
- int value = vPC[3].u.operand;
- unsigned offset = vPC[5].u.operand;
-
- ASSERT(baseObject->offsetForLocation(baseObject->getDirectLocation(*globalData, codeBlock->identifier(vPC[2].u.operand))) == offset);
- baseObject->putDirectOffset(callFrame->globalData(), offset, callFrame->r(value).jsValue());
-
- vPC += OPCODE_LENGTH(op_put_by_id_replace);
- NEXT_INSTRUCTION();
- }
- }
-
- uncachePutByID(codeBlock, vPC);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_id_generic) {
- /* op_put_by_id_generic base(r) property(id) value(r) nop(n) nop(n) nop(n) nop(n) direct(b)
-
- Generic property access: Sets the property named by identifier
- property, belonging to register base, to register value.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
- int direct = vPC[8].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- Identifier& ident = codeBlock->identifier(property);
- PutPropertySlot slot(codeBlock->isStrictMode());
- if (direct) {
- baseValue.putDirect(callFrame, ident, callFrame->r(value).jsValue(), slot);
- ASSERT(slot.base() == baseValue);
- } else
- baseValue.put(callFrame, ident, callFrame->r(value).jsValue(), slot);
- CHECK_FOR_EXCEPTION();
-
- vPC += OPCODE_LENGTH(op_put_by_id_generic);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_del_by_id) {
- /* del_by_id dst(r) base(r) property(id)
-
- Converts register base to Object, deletes the property
- named by identifier property from the object, and writes a
- boolean indicating success (if true) or failure (if false)
- to register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- JSObject* baseObj = callFrame->r(base).jsValue().toObject(callFrame);
- Identifier& ident = codeBlock->identifier(property);
- bool result = baseObj->deleteProperty(callFrame, ident);
- if (!result && codeBlock->isStrictMode()) {
- exceptionValue = createTypeError(callFrame, "Unable to delete property.");
- goto vm_throw;
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
- vPC += OPCODE_LENGTH(op_del_by_id);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_by_pname) {
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
- int expected = vPC[4].u.operand;
- int iter = vPC[5].u.operand;
- int i = vPC[6].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- JSPropertyNameIterator* it = callFrame->r(iter).propertyNameIterator();
- JSValue subscript = callFrame->r(property).jsValue();
- JSValue expectedSubscript = callFrame->r(expected).jsValue();
- int index = callFrame->r(i).i() - 1;
- JSValue result;
- int offset = 0;
- if (subscript == expectedSubscript && baseValue.isCell() && (baseValue.asCell()->structure() == it->cachedStructure()) && it->getOffset(index, offset)) {
- callFrame->uncheckedR(dst) = JSValue(asObject(baseValue)->getDirectOffset(offset));
- vPC += OPCODE_LENGTH(op_get_by_pname);
- NEXT_INSTRUCTION();
- }
- {
- Identifier propertyName(callFrame, subscript.toString(callFrame));
- result = baseValue.get(callFrame, propertyName);
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_pname);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_arguments_length) {
- int dst = vPC[1].u.operand;
- int argumentsRegister = vPC[2].u.operand;
- int property = vPC[3].u.operand;
- JSValue arguments = callFrame->r(argumentsRegister).jsValue();
- if (arguments) {
- Identifier& ident = codeBlock->identifier(property);
- PropertySlot slot(arguments);
- JSValue result = arguments.get(callFrame, ident, slot);
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- } else
- callFrame->uncheckedR(dst) = jsNumber(callFrame->argumentCount());
-
- vPC += OPCODE_LENGTH(op_get_arguments_length);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_argument_by_val) {
- int dst = vPC[1].u.operand;
- int argumentsRegister = vPC[2].u.operand;
- int property = vPC[3].u.operand;
- JSValue arguments = callFrame->r(argumentsRegister).jsValue();
- JSValue subscript = callFrame->r(property).jsValue();
- if (!arguments && subscript.isUInt32() && subscript.asUInt32() < callFrame->argumentCount()) {
- unsigned arg = subscript.asUInt32() + 1;
- unsigned numParameters = callFrame->codeBlock()->m_numParameters;
- if (arg < numParameters)
- callFrame->uncheckedR(dst) = callFrame->r(arg - RegisterFile::CallFrameHeaderSize - numParameters);
- else
- callFrame->uncheckedR(dst) = callFrame->r(arg - RegisterFile::CallFrameHeaderSize - numParameters - callFrame->argumentCount() - 1);
- vPC += OPCODE_LENGTH(op_get_argument_by_val);
- NEXT_INSTRUCTION();
- }
- if (!arguments) {
- Arguments* arguments = new (globalData) Arguments(callFrame);
- callFrame->uncheckedR(argumentsRegister) = JSValue(arguments);
- callFrame->uncheckedR(unmodifiedArgumentsRegister(argumentsRegister)) = JSValue(arguments);
- }
- // fallthrough
- }
- DEFINE_OPCODE(op_get_by_val) {
- /* get_by_val dst(r) base(r) property(r)
-
- Converts register base to Object, gets the property named
- by register property from the object, and puts the result
- in register dst. property is nominally converted to string
- but numbers are treated more efficiently.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- JSValue subscript = callFrame->r(property).jsValue();
-
- JSValue result;
-
- if (LIKELY(subscript.isUInt32())) {
- uint32_t i = subscript.asUInt32();
- if (isJSArray(globalData, baseValue)) {
- JSArray* jsArray = asArray(baseValue);
- if (jsArray->canGetIndex(i))
- result = jsArray->getIndex(i);
- else
- result = jsArray->JSArray::get(callFrame, i);
- } else if (isJSString(globalData, baseValue) && asString(baseValue)->canGetIndex(i))
- result = asString(baseValue)->getIndex(callFrame, i);
- else if (isJSByteArray(globalData, baseValue) && asByteArray(baseValue)->canAccessIndex(i))
- result = asByteArray(baseValue)->getIndex(callFrame, i);
- else
- result = baseValue.get(callFrame, i);
- } else {
- Identifier property(callFrame, subscript.toString(callFrame));
- result = baseValue.get(callFrame, property);
- }
-
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = result;
- vPC += OPCODE_LENGTH(op_get_by_val);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_val) {
- /* put_by_val base(r) property(r) value(r)
-
- Sets register value on register base as the property named
- by register property. Base is converted to object
- first. register property is nominally converted to string
- but numbers are treated more efficiently.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
-
- JSValue baseValue = callFrame->r(base).jsValue();
- JSValue subscript = callFrame->r(property).jsValue();
-
- if (LIKELY(subscript.isUInt32())) {
- uint32_t i = subscript.asUInt32();
- if (isJSArray(globalData, baseValue)) {
- JSArray* jsArray = asArray(baseValue);
- if (jsArray->canSetIndex(i))
- jsArray->setIndex(*globalData, i, callFrame->r(value).jsValue());
- else
- jsArray->JSArray::put(callFrame, i, callFrame->r(value).jsValue());
- } else if (isJSByteArray(globalData, baseValue) && asByteArray(baseValue)->canAccessIndex(i)) {
- JSByteArray* jsByteArray = asByteArray(baseValue);
- double dValue = 0;
- JSValue jsValue = callFrame->r(value).jsValue();
- if (jsValue.isInt32())
- jsByteArray->setIndex(i, jsValue.asInt32());
- else if (jsValue.getNumber(dValue))
- jsByteArray->setIndex(i, dValue);
- else
- baseValue.put(callFrame, i, jsValue);
- } else
- baseValue.put(callFrame, i, callFrame->r(value).jsValue());
- } else {
- Identifier property(callFrame, subscript.toString(callFrame));
- if (!globalData->exception) { // Don't put to an object if toString threw an exception.
- PutPropertySlot slot(codeBlock->isStrictMode());
- baseValue.put(callFrame, property, callFrame->r(value).jsValue(), slot);
- }
- }
-
- CHECK_FOR_EXCEPTION();
- vPC += OPCODE_LENGTH(op_put_by_val);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_del_by_val) {
- /* del_by_val dst(r) base(r) property(r)
-
- Converts register base to Object, deletes the property
- named by register property from the object, and writes a
- boolean indicating success (if true) or failure (if false)
- to register dst.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int property = vPC[3].u.operand;
-
- JSObject* baseObj = callFrame->r(base).jsValue().toObject(callFrame); // may throw
-
- JSValue subscript = callFrame->r(property).jsValue();
- bool result;
- uint32_t i;
- if (subscript.getUInt32(i))
- result = baseObj->deleteProperty(callFrame, i);
- else {
- CHECK_FOR_EXCEPTION();
- Identifier property(callFrame, subscript.toString(callFrame));
- CHECK_FOR_EXCEPTION();
- result = baseObj->deleteProperty(callFrame, property);
- }
- if (!result && codeBlock->isStrictMode()) {
- exceptionValue = createTypeError(callFrame, "Unable to delete property.");
- goto vm_throw;
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(dst) = jsBoolean(result);
- vPC += OPCODE_LENGTH(op_del_by_val);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_by_index) {
- /* put_by_index base(r) property(n) value(r)
-
- Sets register value on register base as the property named
- by the immediate number property. Base is converted to
- object first.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
-
- This opcode is mainly used to initialize array literals.
- */
- int base = vPC[1].u.operand;
- unsigned property = vPC[2].u.operand;
- int value = vPC[3].u.operand;
-
- callFrame->r(base).jsValue().put(callFrame, property, callFrame->r(value).jsValue());
-
- vPC += OPCODE_LENGTH(op_put_by_index);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop) {
- /* loop target(offset)
-
- Jumps unconditionally to offset target from the current
- instruction.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
- int target = vPC[1].u.operand;
- CHECK_FOR_TIMEOUT();
- vPC += target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jmp) {
- /* jmp target(offset)
-
- Jumps unconditionally to offset target from the current
- instruction.
- */
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
- int target = vPC[1].u.operand;
-
- vPC += target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_true) {
- /* loop_if_true cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as true.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_true);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_false) {
- /* loop_if_true cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as false.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (!callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_true);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jtrue) {
- /* jtrue cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as true.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jtrue);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jfalse) {
- /* jfalse cond(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register cond converts to boolean as false.
- */
- int cond = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- if (!callFrame->r(cond).jsValue().toBoolean(callFrame)) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jfalse);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jeq_null) {
- /* jeq_null src(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register src is null.
- */
- int src = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- JSValue srcValue = callFrame->r(src).jsValue();
-
- if (srcValue.isUndefinedOrNull() || (srcValue.isCell() && srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jeq_null);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jneq_null) {
- /* jneq_null src(r) target(offset)
-
- Jumps to offset target from the current instruction, if and
- only if register src is not null.
- */
- int src = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- JSValue srcValue = callFrame->r(src).jsValue();
-
- if (!srcValue.isUndefinedOrNull() && (!srcValue.isCell() || !srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jneq_null);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jneq_ptr) {
- /* jneq_ptr src(r) ptr(jsCell) target(offset)
-
- Jumps to offset target from the current instruction, if the value r is equal
- to ptr, using pointer equality.
- */
- int src = vPC[1].u.operand;
- int target = vPC[3].u.operand;
- JSValue srcValue = callFrame->r(src).jsValue();
- if (srcValue != vPC[2].u.jsCell.get()) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jneq_ptr);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_less) {
- /* loop_if_less src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and then jumps to offset
- target from the current instruction, if and only if the
- result of the comparison is true.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLess(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_less);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_loop_if_lesseq) {
- /* loop_if_lesseq src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than or equal to register
- src2, as with the ECMAScript '<=' operator, and then jumps to
- offset target from the current instruction, if and only if the
- result of the comparison is true.
-
- Additionally this loop instruction may terminate JS execution is
- the JS timeout is reached.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLessEq(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- CHECK_FOR_TIMEOUT();
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_loop_if_lesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jnless) {
- /* jnless src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and then jumps to offset
- target from the current instruction, if and only if the
- result of the comparison is false.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLess(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (!result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jnless);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jless) {
- /* jless src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than register src2, as
- with the ECMAScript '<' operator, and then jumps to offset
- target from the current instruction, if and only if the
- result of the comparison is true.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLess(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jless);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jnlesseq) {
- /* jnlesseq src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than or equal to
- register src2, as with the ECMAScript '<=' operator,
- and then jumps to offset target from the current instruction,
- if and only if theresult of the comparison is false.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLessEq(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (!result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jnlesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jlesseq) {
- /* jlesseq src1(r) src2(r) target(offset)
-
- Checks whether register src1 is less than or equal to
- register src2, as with the ECMAScript '<=' operator,
- and then jumps to offset target from the current instruction,
- if and only if the result of the comparison is true.
- */
- JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
- JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
- int target = vPC[3].u.operand;
-
- bool result = jsLessEq(callFrame, src1, src2);
- CHECK_FOR_EXCEPTION();
-
- if (result) {
- vPC += target;
- NEXT_INSTRUCTION();
- }
-
- vPC += OPCODE_LENGTH(op_jlesseq);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_switch_imm) {
- /* switch_imm tableIndex(n) defaultOffset(offset) scrutinee(r)
-
- Performs a range checked switch on the scrutinee value, using
- the tableIndex-th immediate switch jump table. If the scrutinee value
- is an immediate number in the range covered by the referenced jump
- table, and the value at jumpTable[scrutinee value] is non-zero, then
- that value is used as the jump offset, otherwise defaultOffset is used.
- */
- int tableIndex = vPC[1].u.operand;
- int defaultOffset = vPC[2].u.operand;
- JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
- if (scrutinee.isInt32())
- vPC += codeBlock->immediateSwitchJumpTable(tableIndex).offsetForValue(scrutinee.asInt32(), defaultOffset);
- else {
- double value;
- int32_t intValue;
- if (scrutinee.getNumber(value) && ((intValue = static_cast<int32_t>(value)) == value))
- vPC += codeBlock->immediateSwitchJumpTable(tableIndex).offsetForValue(intValue, defaultOffset);
- else
- vPC += defaultOffset;
- }
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_switch_char) {
- /* switch_char tableIndex(n) defaultOffset(offset) scrutinee(r)
-
- Performs a range checked switch on the scrutinee value, using
- the tableIndex-th character switch jump table. If the scrutinee value
- is a single character string in the range covered by the referenced jump
- table, and the value at jumpTable[scrutinee value] is non-zero, then
- that value is used as the jump offset, otherwise defaultOffset is used.
- */
- int tableIndex = vPC[1].u.operand;
- int defaultOffset = vPC[2].u.operand;
- JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
- if (!scrutinee.isString())
- vPC += defaultOffset;
- else {
- StringImpl* value = asString(scrutinee)->value(callFrame).impl();
- if (value->length() != 1)
- vPC += defaultOffset;
- else
- vPC += codeBlock->characterSwitchJumpTable(tableIndex).offsetForValue(value->characters()[0], defaultOffset);
- }
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_switch_string) {
- /* switch_string tableIndex(n) defaultOffset(offset) scrutinee(r)
-
- Performs a sparse hashmap based switch on the value in the scrutinee
- register, using the tableIndex-th string switch jump table. If the
- scrutinee value is a string that exists as a key in the referenced
- jump table, then the value associated with the string is used as the
- jump offset, otherwise defaultOffset is used.
- */
- int tableIndex = vPC[1].u.operand;
- int defaultOffset = vPC[2].u.operand;
- JSValue scrutinee = callFrame->r(vPC[3].u.operand).jsValue();
- if (!scrutinee.isString())
- vPC += defaultOffset;
- else
- vPC += codeBlock->stringSwitchJumpTable(tableIndex).offsetForValue(asString(scrutinee)->value(callFrame).impl(), defaultOffset);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_new_func) {
- /* new_func dst(r) func(f)
-
- Constructs a new Function instance from function func and
- the current scope chain using the original Function
- constructor, using the rules for function declarations, and
- puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int func = vPC[2].u.operand;
- int shouldCheck = vPC[3].u.operand;
- ASSERT(codeBlock->codeType() != FunctionCode || !codeBlock->needsFullScopeChain() || callFrame->r(codeBlock->activationRegister()).jsValue());
- if (!shouldCheck || !callFrame->r(dst).jsValue())
- callFrame->uncheckedR(dst) = JSValue(codeBlock->functionDecl(func)->make(callFrame, callFrame->scopeChain()));
-
- vPC += OPCODE_LENGTH(op_new_func);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_new_func_exp) {
- /* new_func_exp dst(r) func(f)
-
- Constructs a new Function instance from function func and
- the current scope chain using the original Function
- constructor, using the rules for function expressions, and
- puts the result in register dst.
- */
- int dst = vPC[1].u.operand;
- int funcIndex = vPC[2].u.operand;
-
- ASSERT(codeBlock->codeType() != FunctionCode || !codeBlock->needsFullScopeChain() || callFrame->r(codeBlock->activationRegister()).jsValue());
- FunctionExecutable* function = codeBlock->functionExpr(funcIndex);
- JSFunction* func = function->make(callFrame, callFrame->scopeChain());
-
- /*
- The Identifier in a FunctionExpression can be referenced from inside
- the FunctionExpression's FunctionBody to allow the function to call
- itself recursively. However, unlike in a FunctionDeclaration, the
- Identifier in a FunctionExpression cannot be referenced from and
- does not affect the scope enclosing the FunctionExpression.
- */
- if (!function->name().isNull()) {
- JSStaticScopeObject* functionScopeObject = new (callFrame) JSStaticScopeObject(callFrame, function->name(), func, ReadOnly | DontDelete);
- func->setScope(*globalData, func->scope()->push(functionScopeObject));
- }
-
- callFrame->uncheckedR(dst) = JSValue(func);
-
- vPC += OPCODE_LENGTH(op_new_func_exp);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_call_eval) {
- /* call_eval func(r) argCount(n) registerOffset(n)
-
- Call a function named "eval" with no explicit "this" value
- (which may therefore be the eval operator). If register
- thisVal is the global object, and register func contains
- that global object's original global eval function, then
- perform the eval operator in local scope (interpreting
- the argument registers as for the "call"
- opcode). Otherwise, act exactly as the "call" opcode would.
- */
-
- int func = vPC[1].u.operand;
- int argCount = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- ASSERT(codeBlock->codeType() != FunctionCode || !codeBlock->needsFullScopeChain() || callFrame->r(codeBlock->activationRegister()).jsValue());
- JSValue funcVal = callFrame->r(func).jsValue();
-
- Register* newCallFrame = callFrame->registers() + registerOffset;
- Register* argv = newCallFrame - RegisterFile::CallFrameHeaderSize - argCount;
- JSValue thisValue = argv[0].jsValue();
- JSGlobalObject* globalObject = callFrame->scopeChain()->globalObject.get();
-
- if (thisValue == globalObject && funcVal == globalObject->evalFunction()) {
- JSValue result = callEval(callFrame, registerFile, argv, argCount, registerOffset);
- if ((exceptionValue = globalData->exception))
- goto vm_throw;
- functionReturnValue = result;
-
- vPC += OPCODE_LENGTH(op_call_eval);
- NEXT_INSTRUCTION();
- }
-
- // We didn't find the blessed version of eval, so process this
- // instruction as a normal function call.
- // fall through to op_call
- }
- DEFINE_OPCODE(op_call) {
- /* call func(r) argCount(n) registerOffset(n)
-
- Perform a function call.
-
- registerOffset is the distance the callFrame pointer should move
- before the VM initializes the new call frame's header.
-
- dst is where op_ret should store its result.
- */
-
- int func = vPC[1].u.operand;
- int argCount = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- JSValue v = callFrame->r(func).jsValue();
-
- CallData callData;
- CallType callType = getCallData(v, callData);
-
- if (callType == CallTypeJS) {
- ScopeChainNode* callDataScopeChain = callData.js.scopeChain;
-
- JSObject* error = callData.js.functionExecutable->compileForCall(callFrame, callDataScopeChain);
- if (UNLIKELY(!!error)) {
- exceptionValue = error;
- goto vm_throw;
- }
-
- CallFrame* previousCallFrame = callFrame;
- CodeBlock* newCodeBlock = &callData.js.functionExecutable->generatedBytecodeForCall();
- callFrame = slideRegisterWindowForCall(newCodeBlock, registerFile, callFrame, registerOffset, argCount);
- if (UNLIKELY(!callFrame)) {
- callFrame = previousCallFrame;
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- callFrame->init(newCodeBlock, vPC + OPCODE_LENGTH(op_call), callDataScopeChain, previousCallFrame, argCount, asFunction(v));
- codeBlock = newCodeBlock;
- ASSERT(codeBlock == callFrame->codeBlock());
- vPC = newCodeBlock->instructions().begin();
-
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
-
- NEXT_INSTRUCTION();
- }
-
- if (callType == CallTypeHost) {
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset);
- if (!registerFile->grow(newCallFrame->registers())) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- newCallFrame->init(0, vPC + OPCODE_LENGTH(op_call), scopeChain, callFrame, argCount, asObject(v));
-
- JSValue returnValue;
- {
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- returnValue = JSValue::decode(callData.native.function(newCallFrame));
- }
- CHECK_FOR_EXCEPTION();
-
- functionReturnValue = returnValue;
-
- vPC += OPCODE_LENGTH(op_call);
- NEXT_INSTRUCTION();
- }
-
- ASSERT(callType == CallTypeNone);
-
- exceptionValue = createNotAFunctionError(callFrame, v);
- goto vm_throw;
- }
- DEFINE_OPCODE(op_load_varargs) {
- int argCountDst = vPC[1].u.operand;
- int argsOffset = vPC[2].u.operand;
-
- JSValue arguments = callFrame->r(argsOffset).jsValue();
- uint32_t argCount = 0;
- if (!arguments) {
- argCount = (uint32_t)(callFrame->argumentCount());
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- ASSERT(!asFunction(callFrame->callee())->isHostFunction());
- int32_t expectedParams = asFunction(callFrame->callee())->jsExecutable()->parameterCount();
- int32_t inplaceArgs = min(static_cast<int32_t>(argCount), expectedParams);
- int32_t i = 0;
- Register* argStore = callFrame->registers() + argsOffset;
-
- // First step is to copy the "expected" parameters from their normal location relative to the callframe
- for (; i < inplaceArgs; i++)
- argStore[i] = callFrame->registers()[i - RegisterFile::CallFrameHeaderSize - expectedParams];
- // Then we copy any additional arguments that may be further up the stack ('-1' to account for 'this')
- for (; i < static_cast<int32_t>(argCount); i++)
- argStore[i] = callFrame->registers()[i - RegisterFile::CallFrameHeaderSize - expectedParams - static_cast<int32_t>(argCount) - 1];
- } else if (!arguments.isUndefinedOrNull()) {
- if (!arguments.isObject()) {
- exceptionValue = createInvalidParamError(callFrame, "Function.prototype.apply", arguments);
- goto vm_throw;
- }
- if (asObject(arguments)->classInfo() == &Arguments::s_info) {
- Arguments* args = asArguments(arguments);
- argCount = args->numProvidedArguments(callFrame);
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- args->copyToRegisters(callFrame, callFrame->registers() + argsOffset, argCount);
- } else if (isJSArray(&callFrame->globalData(), arguments)) {
- JSArray* array = asArray(arguments);
- argCount = array->length();
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- array->copyToRegisters(callFrame, callFrame->registers() + argsOffset, argCount);
- } else if (asObject(arguments)->inherits(&JSArray::s_info)) {
- JSObject* argObject = asObject(arguments);
- argCount = argObject->get(callFrame, callFrame->propertyNames().length).toUInt32(callFrame);
- argCount = min<uint32_t>(argCount, Arguments::MaxArguments);
- int32_t sizeDelta = argsOffset + argCount + RegisterFile::CallFrameHeaderSize;
- Register* newEnd = callFrame->registers() + sizeDelta;
- if (!registerFile->grow(newEnd) || ((newEnd - callFrame->registers()) != sizeDelta)) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- Register* argsBuffer = callFrame->registers() + argsOffset;
- for (uint32_t i = 0; i < argCount; ++i) {
- argsBuffer[i] = asObject(arguments)->get(callFrame, i);
- CHECK_FOR_EXCEPTION();
- }
- } else {
- exceptionValue = createInvalidParamError(callFrame, "Function.prototype.apply", arguments);
- goto vm_throw;
- }
- }
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(argCountDst) = Register::withInt(argCount + 1);
- vPC += OPCODE_LENGTH(op_load_varargs);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_call_varargs) {
- /* call_varargs func(r) argCountReg(r) baseRegisterOffset(n)
-
- Perform a function call with a dynamic set of arguments.
-
- registerOffset is the distance the callFrame pointer should move
- before the VM initializes the new call frame's header, excluding
- space for arguments.
-
- dst is where op_ret should store its result.
- */
-
- int func = vPC[1].u.operand;
- int argCountReg = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- JSValue v = callFrame->r(func).jsValue();
- int argCount = callFrame->r(argCountReg).i();
- registerOffset += argCount;
- CallData callData;
- CallType callType = getCallData(v, callData);
-
- if (callType == CallTypeJS) {
- ScopeChainNode* callDataScopeChain = callData.js.scopeChain;
-
- JSObject* error = callData.js.functionExecutable->compileForCall(callFrame, callDataScopeChain);
- if (UNLIKELY(!!error)) {
- exceptionValue = error;
- goto vm_throw;
- }
-
- CallFrame* previousCallFrame = callFrame;
- CodeBlock* newCodeBlock = &callData.js.functionExecutable->generatedBytecodeForCall();
- callFrame = slideRegisterWindowForCall(newCodeBlock, registerFile, callFrame, registerOffset, argCount);
- if (UNLIKELY(!callFrame)) {
- callFrame = previousCallFrame;
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- callFrame->init(newCodeBlock, vPC + OPCODE_LENGTH(op_call_varargs), callDataScopeChain, previousCallFrame, argCount, asFunction(v));
- codeBlock = newCodeBlock;
- ASSERT(codeBlock == callFrame->codeBlock());
- vPC = newCodeBlock->instructions().begin();
-
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
-
- NEXT_INSTRUCTION();
- }
-
- if (callType == CallTypeHost) {
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset);
- if (!registerFile->grow(newCallFrame->registers())) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- newCallFrame->init(0, vPC + OPCODE_LENGTH(op_call_varargs), scopeChain, callFrame, argCount, asObject(v));
-
- JSValue returnValue;
- {
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- returnValue = JSValue::decode(callData.native.function(newCallFrame));
- }
- CHECK_FOR_EXCEPTION();
-
- functionReturnValue = returnValue;
-
- vPC += OPCODE_LENGTH(op_call_varargs);
- NEXT_INSTRUCTION();
- }
-
- ASSERT(callType == CallTypeNone);
-
- exceptionValue = createNotAFunctionError(callFrame, v);
- goto vm_throw;
- }
- DEFINE_OPCODE(op_tear_off_activation) {
- /* tear_off_activation activation(r) arguments(r)
-
- Copy locals and named parameters from the register file to the heap.
- Point the bindings in 'activation' and 'arguments' to this new backing
- store. (Note that 'arguments' may not have been created. If created,
- 'arguments' already holds a copy of any extra / unnamed parameters.)
-
- This opcode appears before op_ret in functions that require full scope chains.
- */
-
- int activation = vPC[1].u.operand;
- int arguments = vPC[2].u.operand;
- ASSERT(codeBlock->needsFullScopeChain());
- JSValue activationValue = callFrame->r(activation).jsValue();
- if (activationValue) {
- asActivation(activationValue)->copyRegisters(*globalData);
-
- if (JSValue argumentsValue = callFrame->r(unmodifiedArgumentsRegister(arguments)).jsValue()) {
- if (!codeBlock->isStrictMode())
- asArguments(argumentsValue)->setActivation(*globalData, asActivation(activationValue));
- }
- } else if (JSValue argumentsValue = callFrame->r(unmodifiedArgumentsRegister(arguments)).jsValue()) {
- if (!codeBlock->isStrictMode())
- asArguments(argumentsValue)->copyRegisters(*globalData);
- }
-
- vPC += OPCODE_LENGTH(op_tear_off_activation);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_tear_off_arguments) {
- /* tear_off_arguments arguments(r)
-
- Copy named parameters from the register file to the heap. Point the
- bindings in 'arguments' to this new backing store. (Note that
- 'arguments' may not have been created. If created, 'arguments' already
- holds a copy of any extra / unnamed parameters.)
-
- This opcode appears before op_ret in functions that don't require full
- scope chains, but do use 'arguments'.
- */
-
- int src1 = vPC[1].u.operand;
- ASSERT(!codeBlock->needsFullScopeChain() && codeBlock->ownerExecutable()->usesArguments());
-
- if (JSValue arguments = callFrame->r(unmodifiedArgumentsRegister(src1)).jsValue())
- asArguments(arguments)->copyRegisters(*globalData);
-
- vPC += OPCODE_LENGTH(op_tear_off_arguments);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_ret) {
- /* ret result(r)
-
- Return register result as the return value of the current
- function call, writing it into functionReturnValue.
- In addition, unwind one call frame and restore the scope
- chain, code block instruction pointer and register base
- to those of the calling function.
- */
-
- int result = vPC[1].u.operand;
-
- JSValue returnValue = callFrame->r(result).jsValue();
-
- vPC = callFrame->returnVPC();
- callFrame = callFrame->callerFrame();
-
- if (callFrame->hasHostCallFrameFlag())
- return returnValue;
-
- functionReturnValue = returnValue;
- codeBlock = callFrame->codeBlock();
- ASSERT(codeBlock == callFrame->codeBlock());
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_call_put_result) {
- /* op_call_put_result result(r)
-
- Move call result from functionReturnValue to caller's
- expected return value register.
- */
-
- callFrame->uncheckedR(vPC[1].u.operand) = functionReturnValue;
-
- vPC += OPCODE_LENGTH(op_call_put_result);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_ret_object_or_this) {
- /* ret result(r)
-
- Return register result as the return value of the current
- function call, writing it into the caller's expected return
- value register. In addition, unwind one call frame and
- restore the scope chain, code block instruction pointer and
- register base to those of the calling function.
- */
-
- int result = vPC[1].u.operand;
-
- JSValue returnValue = callFrame->r(result).jsValue();
-
- if (UNLIKELY(!returnValue.isObject()))
- returnValue = callFrame->r(vPC[2].u.operand).jsValue();
-
- vPC = callFrame->returnVPC();
- callFrame = callFrame->callerFrame();
-
- if (callFrame->hasHostCallFrameFlag())
- return returnValue;
-
- functionReturnValue = returnValue;
- codeBlock = callFrame->codeBlock();
- ASSERT(codeBlock == callFrame->codeBlock());
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_enter) {
- /* enter
-
- Initializes local variables to undefined. If the code block requires
- an activation, enter_with_activation is used instead.
-
- This opcode appears only at the beginning of a code block.
- */
-
- size_t i = 0;
- for (size_t count = codeBlock->m_numVars; i < count; ++i)
- callFrame->uncheckedR(i) = jsUndefined();
-
- vPC += OPCODE_LENGTH(op_enter);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_create_activation) {
- /* create_activation dst(r)
-
- If the activation object for this callframe has not yet been created,
- this creates it and writes it back to dst.
- */
-
- int activationReg = vPC[1].u.operand;
- if (!callFrame->r(activationReg).jsValue()) {
- JSActivation* activation = new (globalData) JSActivation(callFrame, static_cast<FunctionExecutable*>(codeBlock->ownerExecutable()));
- callFrame->r(activationReg) = JSValue(activation);
- callFrame->setScopeChain(callFrame->scopeChain()->push(activation));
- }
- vPC += OPCODE_LENGTH(op_create_activation);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_callee) {
- /* op_get_callee callee(r)
-
- Move callee into a register.
- */
-
- callFrame->uncheckedR(vPC[1].u.operand) = JSValue(callFrame->callee());
-
- vPC += OPCODE_LENGTH(op_get_callee);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_create_this) {
- /* op_create_this this(r) proto(r)
-
- Allocate an object as 'this', fr use in construction.
-
- This opcode should only be used at the beginning of a code
- block.
- */
-
- int thisRegister = vPC[1].u.operand;
- int protoRegister = vPC[2].u.operand;
-
- JSFunction* constructor = asFunction(callFrame->callee());
-#if !ASSERT_DISABLED
- ConstructData constructData;
- ASSERT(constructor->getConstructData(constructData) == ConstructTypeJS);
-#endif
-
- Structure* structure;
- JSValue proto = callFrame->r(protoRegister).jsValue();
- if (proto.isObject())
- structure = asObject(proto)->inheritorID(callFrame->globalData());
- else
- structure = constructor->scope()->globalObject->emptyObjectStructure();
- callFrame->uncheckedR(thisRegister) = constructEmptyObject(callFrame, structure);
-
- vPC += OPCODE_LENGTH(op_create_this);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_convert_this) {
- /* convert_this this(r)
-
- Takes the value in the 'this' register, converts it to a
- value that is suitable for use as the 'this' value, and
- stores it in the 'this' register. This opcode is emitted
- to avoid doing the conversion in the caller unnecessarily.
-
- This opcode should only be used at the beginning of a code
- block.
- */
-
- int thisRegister = vPC[1].u.operand;
- JSValue thisVal = callFrame->r(thisRegister).jsValue();
- if (thisVal.needsThisConversion())
- callFrame->uncheckedR(thisRegister) = JSValue(thisVal.toThisObject(callFrame));
-
- vPC += OPCODE_LENGTH(op_convert_this);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_convert_this_strict) {
- /* convert_this_strict this(r)
-
- Takes the value in the 'this' register, and converts it to
- its "this" form if (and only if) "this" is an object with a
- custom this conversion
-
- This opcode should only be used at the beginning of a code
- block.
- */
-
- int thisRegister = vPC[1].u.operand;
- JSValue thisVal = callFrame->r(thisRegister).jsValue();
- if (thisVal.isObject() && thisVal.needsThisConversion())
- callFrame->uncheckedR(thisRegister) = JSValue(thisVal.toStrictThisObject(callFrame));
-
- vPC += OPCODE_LENGTH(op_convert_this_strict);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_init_lazy_reg) {
- /* init_lazy_reg dst(r)
-
- Initialises dst(r) to JSValue().
-
- This opcode appears only at the beginning of a code block.
- */
- int dst = vPC[1].u.operand;
-
- callFrame->uncheckedR(dst) = JSValue();
- vPC += OPCODE_LENGTH(op_init_lazy_reg);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_create_arguments) {
- /* create_arguments dst(r)
-
- Creates the 'arguments' object and places it in both the
- 'arguments' call frame slot and the local 'arguments'
- register, if it has not already been initialised.
- */
-
- int dst = vPC[1].u.operand;
-
- if (!callFrame->r(dst).jsValue()) {
- Arguments* arguments = new (globalData) Arguments(callFrame);
- callFrame->uncheckedR(dst) = JSValue(arguments);
- callFrame->uncheckedR(unmodifiedArgumentsRegister(dst)) = JSValue(arguments);
- }
- vPC += OPCODE_LENGTH(op_create_arguments);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_construct) {
- /* construct func(r) argCount(n) registerOffset(n) proto(r) thisRegister(r)
-
- Invoke register "func" as a constructor. For JS
- functions, the calling convention is exactly as for the
- "call" opcode, except that the "this" value is a newly
- created Object. For native constructors, no "this"
- value is passed. In either case, the argCount and registerOffset
- registers are interpreted as for the "call" opcode.
-
- Register proto must contain the prototype property of
- register func. This is to enable polymorphic inline
- caching of this lookup.
- */
-
- int func = vPC[1].u.operand;
- int argCount = vPC[2].u.operand;
- int registerOffset = vPC[3].u.operand;
-
- JSValue v = callFrame->r(func).jsValue();
-
- ConstructData constructData;
- ConstructType constructType = getConstructData(v, constructData);
-
- if (constructType == ConstructTypeJS) {
- ScopeChainNode* callDataScopeChain = constructData.js.scopeChain;
-
- JSObject* error = constructData.js.functionExecutable->compileForConstruct(callFrame, callDataScopeChain);
- if (UNLIKELY(!!error)) {
- exceptionValue = error;
- goto vm_throw;
- }
-
- CallFrame* previousCallFrame = callFrame;
- CodeBlock* newCodeBlock = &constructData.js.functionExecutable->generatedBytecodeForConstruct();
- callFrame = slideRegisterWindowForCall(newCodeBlock, registerFile, callFrame, registerOffset, argCount);
- if (UNLIKELY(!callFrame)) {
- callFrame = previousCallFrame;
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
-
- callFrame->init(newCodeBlock, vPC + OPCODE_LENGTH(op_construct), callDataScopeChain, previousCallFrame, argCount, asFunction(v));
- codeBlock = newCodeBlock;
- vPC = newCodeBlock->instructions().begin();
-#if ENABLE(OPCODE_STATS)
- OpcodeStats::resetLastInstruction();
-#endif
-
- NEXT_INSTRUCTION();
- }
-
- if (constructType == ConstructTypeHost) {
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- CallFrame* newCallFrame = CallFrame::create(callFrame->registers() + registerOffset);
- if (!registerFile->grow(newCallFrame->registers())) {
- exceptionValue = createStackOverflowError(callFrame);
- goto vm_throw;
- }
- newCallFrame->init(0, vPC + OPCODE_LENGTH(op_construct), scopeChain, callFrame, argCount, asObject(v));
-
- JSValue returnValue;
- {
- SamplingTool::HostCallRecord callRecord(m_sampler.get());
- returnValue = JSValue::decode(constructData.native.function(newCallFrame));
- }
- CHECK_FOR_EXCEPTION();
- functionReturnValue = returnValue;
-
- vPC += OPCODE_LENGTH(op_construct);
- NEXT_INSTRUCTION();
- }
-
- ASSERT(constructType == ConstructTypeNone);
-
- exceptionValue = createNotAConstructorError(callFrame, v);
- goto vm_throw;
- }
- DEFINE_OPCODE(op_strcat) {
- /* strcat dst(r) src(r) count(n)
-
- Construct a new String instance using the original
- constructor, and puts the result in register dst.
- The string will be the result of concatenating count
- strings with values taken from registers starting at
- register src.
- */
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
- int count = vPC[3].u.operand;
-
- callFrame->uncheckedR(dst) = concatenateStrings(callFrame, &callFrame->registers()[src], count);
- CHECK_FOR_EXCEPTION();
- vPC += OPCODE_LENGTH(op_strcat);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_to_primitive) {
- int dst = vPC[1].u.operand;
- int src = vPC[2].u.operand;
-
- callFrame->uncheckedR(dst) = callFrame->r(src).jsValue().toPrimitive(callFrame);
- vPC += OPCODE_LENGTH(op_to_primitive);
-
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_push_scope) {
- /* push_scope scope(r)
-
- Converts register scope to object, and pushes it onto the top
- of the current scope chain. The contents of the register scope
- are replaced by the result of toObject conversion of the scope.
- */
- int scope = vPC[1].u.operand;
- JSValue v = callFrame->r(scope).jsValue();
- JSObject* o = v.toObject(callFrame);
- CHECK_FOR_EXCEPTION();
-
- callFrame->uncheckedR(scope) = JSValue(o);
- callFrame->setScopeChain(callFrame->scopeChain()->push(o));
-
- vPC += OPCODE_LENGTH(op_push_scope);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_pop_scope) {
- /* pop_scope
-
- Removes the top item from the current scope chain.
- */
- callFrame->setScopeChain(callFrame->scopeChain()->pop());
-
- vPC += OPCODE_LENGTH(op_pop_scope);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_get_pnames) {
- /* get_pnames dst(r) base(r) i(n) size(n) breakTarget(offset)
-
- Creates a property name list for register base and puts it
- in register dst, initializing i and size for iteration. If
- base is undefined or null, jumps to breakTarget.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int i = vPC[3].u.operand;
- int size = vPC[4].u.operand;
- int breakTarget = vPC[5].u.operand;
-
- JSValue v = callFrame->r(base).jsValue();
- if (v.isUndefinedOrNull()) {
- vPC += breakTarget;
- NEXT_INSTRUCTION();
- }
-
- JSObject* o = v.toObject(callFrame);
- Structure* structure = o->structure();
- JSPropertyNameIterator* jsPropertyNameIterator = structure->enumerationCache();
- if (!jsPropertyNameIterator || jsPropertyNameIterator->cachedPrototypeChain() != structure->prototypeChain(callFrame))
- jsPropertyNameIterator = JSPropertyNameIterator::create(callFrame, o);
-
- callFrame->uncheckedR(dst) = jsPropertyNameIterator;
- callFrame->uncheckedR(base) = JSValue(o);
- callFrame->uncheckedR(i) = Register::withInt(0);
- callFrame->uncheckedR(size) = Register::withInt(jsPropertyNameIterator->size());
- vPC += OPCODE_LENGTH(op_get_pnames);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_next_pname) {
- /* next_pname dst(r) base(r) i(n) size(n) iter(r) target(offset)
-
- Copies the next name from the property name list in
- register iter to dst, then jumps to offset target. If there are no
- names left, invalidates the iterator and continues to the next
- instruction.
- */
- int dst = vPC[1].u.operand;
- int base = vPC[2].u.operand;
- int i = vPC[3].u.operand;
- int size = vPC[4].u.operand;
- int iter = vPC[5].u.operand;
- int target = vPC[6].u.operand;
-
- JSPropertyNameIterator* it = callFrame->r(iter).propertyNameIterator();
- while (callFrame->r(i).i() != callFrame->r(size).i()) {
- JSValue key = it->get(callFrame, asObject(callFrame->r(base).jsValue()), callFrame->r(i).i());
- CHECK_FOR_EXCEPTION();
- callFrame->uncheckedR(i) = Register::withInt(callFrame->r(i).i() + 1);
- if (key) {
- CHECK_FOR_TIMEOUT();
- callFrame->uncheckedR(dst) = key;
- vPC += target;
- NEXT_INSTRUCTION();
- }
- }
-
- vPC += OPCODE_LENGTH(op_next_pname);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jmp_scopes) {
- /* jmp_scopes count(n) target(offset)
-
- Removes the a number of items from the current scope chain
- specified by immediate number count, then jumps to offset
- target.
- */
- int count = vPC[1].u.operand;
- int target = vPC[2].u.operand;
-
- ScopeChainNode* tmp = callFrame->scopeChain();
- while (count--)
- tmp = tmp->pop();
- callFrame->setScopeChain(tmp);
-
- vPC += target;
- NEXT_INSTRUCTION();
- }
-#if ENABLE(COMPUTED_GOTO_INTERPRETER)
- // Appease GCC
- goto *(&&skip_new_scope);
-#endif
- DEFINE_OPCODE(op_push_new_scope) {
- /* new_scope dst(r) property(id) value(r)
-
- Constructs a new StaticScopeObject with property set to value. That scope
- object is then pushed onto the ScopeChain. The scope object is then stored
- in dst for GC.
- */
- callFrame->setScopeChain(createExceptionScope(callFrame, vPC));
-
- vPC += OPCODE_LENGTH(op_push_new_scope);
- NEXT_INSTRUCTION();
- }
-#if ENABLE(COMPUTED_GOTO_INTERPRETER)
- skip_new_scope:
-#endif
- DEFINE_OPCODE(op_catch) {
- /* catch ex(r)
-
- Retrieves the VM's current exception and puts it in register
- ex. This is only valid after an exception has been raised,
- and usually forms the beginning of an exception handler.
- */
- ASSERT(exceptionValue);
- ASSERT(!globalData->exception);
- int ex = vPC[1].u.operand;
- callFrame->uncheckedR(ex) = exceptionValue;
- exceptionValue = JSValue();
-
- vPC += OPCODE_LENGTH(op_catch);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_throw) {
- /* throw ex(r)
-
- Throws register ex as an exception. This involves three
- steps: first, it is set as the current exception in the
- VM's internal state, then the stack is unwound until an
- exception handler or a native code boundary is found, and
- then control resumes at the exception handler if any or
- else the script returns control to the nearest native caller.
- */
-
- int ex = vPC[1].u.operand;
- exceptionValue = callFrame->r(ex).jsValue();
-
- handler = throwException(callFrame, exceptionValue, vPC - codeBlock->instructions().begin());
- if (!handler)
- return throwError(callFrame, exceptionValue);
-
- codeBlock = callFrame->codeBlock();
- vPC = codeBlock->instructions().begin() + handler->target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_throw_reference_error) {
- /* op_throw_reference_error message(k)
-
- Constructs a new reference Error instance using the
- original constructor, using constant message as the
- message string. The result is thrown.
- */
- UString message = callFrame->r(vPC[1].u.operand).jsValue().toString(callFrame);
- exceptionValue = JSValue(createReferenceError(callFrame, message));
- goto vm_throw;
- }
- DEFINE_OPCODE(op_end) {
- /* end result(r)
-
- Return register result as the value of a global or eval
- program. Return control to the calling native code.
- */
-
- int result = vPC[1].u.operand;
- return callFrame->r(result).jsValue();
- }
- DEFINE_OPCODE(op_put_getter) {
- /* put_getter base(r) property(id) function(r)
-
- Sets register function on register base as the getter named
- by identifier property. Base and function are assumed to be
- objects as this op should only be used for getters defined
- in object literal form.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int function = vPC[3].u.operand;
-
- ASSERT(callFrame->r(base).jsValue().isObject());
- JSObject* baseObj = asObject(callFrame->r(base).jsValue());
- Identifier& ident = codeBlock->identifier(property);
- ASSERT(callFrame->r(function).jsValue().isObject());
- baseObj->defineGetter(callFrame, ident, asObject(callFrame->r(function).jsValue()));
-
- vPC += OPCODE_LENGTH(op_put_getter);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_put_setter) {
- /* put_setter base(r) property(id) function(r)
-
- Sets register function on register base as the setter named
- by identifier property. Base and function are assumed to be
- objects as this op should only be used for setters defined
- in object literal form.
-
- Unlike many opcodes, this one does not write any output to
- the register file.
- */
- int base = vPC[1].u.operand;
- int property = vPC[2].u.operand;
- int function = vPC[3].u.operand;
-
- ASSERT(callFrame->r(base).jsValue().isObject());
- JSObject* baseObj = asObject(callFrame->r(base).jsValue());
- Identifier& ident = codeBlock->identifier(property);
- ASSERT(callFrame->r(function).jsValue().isObject());
- baseObj->defineSetter(callFrame, ident, asObject(callFrame->r(function).jsValue()), 0);
-
- vPC += OPCODE_LENGTH(op_put_setter);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_method_check) {
- vPC++;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_jsr) {
- /* jsr retAddrDst(r) target(offset)
-
- Places the address of the next instruction into the retAddrDst
- register and jumps to offset target from the current instruction.
- */
- int retAddrDst = vPC[1].u.operand;
- int target = vPC[2].u.operand;
- callFrame->r(retAddrDst) = vPC + OPCODE_LENGTH(op_jsr);
-
- vPC += target;
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_sret) {
- /* sret retAddrSrc(r)
-
- Jumps to the address stored in the retAddrSrc register. This
- differs from op_jmp because the target address is stored in a
- register, not as an immediate.
- */
- int retAddrSrc = vPC[1].u.operand;
- vPC = callFrame->r(retAddrSrc).vPC();
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_debug) {
- /* debug debugHookID(n) firstLine(n) lastLine(n)
-
- Notifies the debugger of the current state of execution. This opcode
- is only generated while the debugger is attached.
- */
- int debugHookID = vPC[1].u.operand;
- int firstLine = vPC[2].u.operand;
- int lastLine = vPC[3].u.operand;
-
- debug(callFrame, static_cast<DebugHookID>(debugHookID), firstLine, lastLine);
-
- vPC += OPCODE_LENGTH(op_debug);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_profile_will_call) {
- /* op_profile_will_call function(r)
-
- Notifies the profiler of the beginning of a function call. This opcode
- is only generated if developer tools are enabled.
- */
- int function = vPC[1].u.operand;
-
- if (*enabledProfilerReference)
- (*enabledProfilerReference)->willExecute(callFrame, callFrame->r(function).jsValue());
-
- vPC += OPCODE_LENGTH(op_profile_will_call);
- NEXT_INSTRUCTION();
- }
- DEFINE_OPCODE(op_profile_did_call) {
- /* op_profile_did_call function(r)
-
- Notifies the profiler of the end of a function call. This opcode
- is only generated if developer tools are enabled.
- */
- int function = vPC[1].u.operand;
-
- if (*enabledProfilerReference)
- (*enabledProfilerReference)->didExecute(callFrame, callFrame->r(function).jsValue());
-
- vPC += OPCODE_LENGTH(op_profile_did_call);
- NEXT_INSTRUCTION();
- }
- vm_throw: {
- globalData->exception = JSValue();
- if (!tickCount) {
- // The exceptionValue is a lie! (GCC produces bad code for reasons I
- // cannot fathom if we don't assign to the exceptionValue before branching)
- exceptionValue = createInterruptedExecutionException(globalData);
- }
- JSGlobalObject* globalObject = callFrame->lexicalGlobalObject();
- handler = throwException(callFrame, exceptionValue, vPC - codeBlock->instructions().begin());
- if (!handler) {
- // Can't use the callframe at this point as the scopechain, etc have
- // been released.
- return throwError(globalObject->globalExec(), exceptionValue);
- }
-
- codeBlock = callFrame->codeBlock();
- vPC = codeBlock->instructions().begin() + handler->target;
- NEXT_INSTRUCTION();
- }
- }
-#if !ENABLE(COMPUTED_GOTO_INTERPRETER)
- } // iterator loop ends
-#endif
- #undef NEXT_INSTRUCTION
- #undef DEFINE_OPCODE
- #undef CHECK_FOR_EXCEPTION
- #undef CHECK_FOR_TIMEOUT
-#endif // ENABLE(INTERPRETER)
-}
-
-JSValue Interpreter::retrieveArguments(CallFrame* callFrame, JSFunction* function) const
-{
- CallFrame* functionCallFrame = findFunctionCallFrame(callFrame, function);
- if (!functionCallFrame)
- return jsNull();
-
- CodeBlock* codeBlock = functionCallFrame->codeBlock();
- if (codeBlock->usesArguments()) {
- ASSERT(codeBlock->codeType() == FunctionCode);
- int argumentsRegister = codeBlock->argumentsRegister();
- int realArgumentsRegister = unmodifiedArgumentsRegister(argumentsRegister);
- if (JSValue arguments = functionCallFrame->uncheckedR(argumentsRegister).jsValue())
- return arguments;
- JSValue arguments = JSValue(new (callFrame) Arguments(functionCallFrame));
- functionCallFrame->r(argumentsRegister) = arguments;
- functionCallFrame->r(realArgumentsRegister) = arguments;
- return arguments;
- }
-
- Arguments* arguments = new (functionCallFrame) Arguments(functionCallFrame);
- arguments->copyRegisters(functionCallFrame->globalData());
- return arguments;
-}
-
-JSValue Interpreter::retrieveCaller(CallFrame* callFrame, JSFunction* function) const
-{
- CallFrame* functionCallFrame = findFunctionCallFrame(callFrame, function);
- if (!functionCallFrame)
- return jsNull();
-
- CallFrame* callerFrame = functionCallFrame->callerFrame();
- if (callerFrame->hasHostCallFrameFlag())
- return jsNull();
-
- JSValue caller = callerFrame->callee();
- if (!caller)
- return jsNull();
-
- return caller;
-}
-
-void Interpreter::retrieveLastCaller(CallFrame* callFrame, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue& function) const
-{
- function = JSValue();
- lineNumber = -1;
- sourceURL = UString();
-
- CallFrame* callerFrame = callFrame->callerFrame();
- if (callerFrame->hasHostCallFrameFlag())
- return;
-
- CodeBlock* callerCodeBlock = callerFrame->codeBlock();
- if (!callerCodeBlock)
- return;
- unsigned bytecodeOffset = 0;
-#if ENABLE(INTERPRETER)
- if (!callerFrame->globalData().canUseJIT())
- bytecodeOffset = callerCodeBlock->bytecodeOffset(callFrame->returnVPC());
-#if ENABLE(JIT)
- else
- bytecodeOffset = callerCodeBlock->bytecodeOffset(callFrame->returnPC());
-#endif
-#else
- bytecodeOffset = callerCodeBlock->bytecodeOffset(callFrame->returnPC());
-#endif
- lineNumber = callerCodeBlock->lineNumberForBytecodeOffset(bytecodeOffset - 1);
- sourceID = callerCodeBlock->ownerExecutable()->sourceID();
- sourceURL = callerCodeBlock->ownerExecutable()->sourceURL();
- function = callerFrame->callee();
-}
-
-CallFrame* Interpreter::findFunctionCallFrame(CallFrame* callFrame, JSFunction* function)
-{
- for (CallFrame* candidate = callFrame; candidate; candidate = candidate->callerFrame()->removeHostCallFrameFlag()) {
- if (candidate->callee() == function)
- return candidate;
- }
- return 0;
-}
+ ASSERT(!callFrame->hadException());
+}
void Interpreter::enableSampler()
{
#if ENABLE(OPCODE_SAMPLING)
if (!m_sampler) {
- m_sampler.set(new SamplingTool(this));
+ m_sampler = std::make_unique<SamplingTool>(this);
m_sampler->setup();
}
#endif
projects / apple / javascriptcore.git / blobdiff