| /* |
| * Copyright (C) 2008-2010, 2012-2016 Apple Inc. All rights reserved. |
| * Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "Interpreter.h" |
| |
| #include "BatchedTransitionOptimizer.h" |
| #include "CallFrameClosure.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 "JSArrayInlines.h" |
| #include "JSBoundFunction.h" |
| #include "JSCInlines.h" |
| #include "JSLexicalEnvironment.h" |
| #include "JSModuleEnvironment.h" |
| #include "JSString.h" |
| #include "JSWithScope.h" |
| #include "LLIntCLoop.h" |
| #include "LLIntData.h" |
| #include "LLIntThunks.h" |
| #include "LiteralParser.h" |
| #include "ObjectPrototype.h" |
| #include "Parser.h" |
| #include "ProtoCallFrame.h" |
| #include "RegExpObject.h" |
| #include "Register.h" |
| #include "ScopedArguments.h" |
| #include "StackAlignment.h" |
| #include "StackVisitor.h" |
| #include "StrictEvalActivation.h" |
| #include "StrongInlines.h" |
| #include "Symbol.h" |
| #include "VMEntryScope.h" |
| #include "VMInlines.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/text/StringBuilder.h> |
| |
| #if ENABLE(JIT) |
| #include "JIT.h" |
| #endif |
| |
| using namespace std; |
| |
| namespace JSC { |
| |
| JSValue eval(CallFrame* callFrame) |
| { |
| VM& vm = callFrame->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| if (!callFrame->argumentCount()) |
| return jsUndefined(); |
| |
| JSValue program = callFrame->argument(0); |
| if (!program.isString()) |
| return program; |
| |
| TopCallFrameSetter topCallFrame(vm, callFrame); |
| JSGlobalObject* globalObject = callFrame->lexicalGlobalObject(); |
| if (!globalObject->evalEnabled()) { |
| throwException(callFrame, scope, createEvalError(callFrame, globalObject->evalDisabledErrorMessage())); |
| return jsUndefined(); |
| } |
| String programSource = asString(program)->value(callFrame); |
| RETURN_IF_EXCEPTION(scope, JSValue()); |
| |
| CallFrame* callerFrame = callFrame->callerFrame(); |
| CodeBlock* callerCodeBlock = callerFrame->codeBlock(); |
| JSScope* callerScopeChain = callerFrame->uncheckedR(callerCodeBlock->scopeRegister().offset()).Register::scope(); |
| UnlinkedCodeBlock* callerUnlinkedCodeBlock = callerCodeBlock->unlinkedCodeBlock(); |
| |
| bool isArrowFunctionContext = callerUnlinkedCodeBlock->isArrowFunction() || callerUnlinkedCodeBlock->isArrowFunctionContext(); |
| |
| DerivedContextType derivedContextType = callerUnlinkedCodeBlock->derivedContextType(); |
| if (!isArrowFunctionContext && callerUnlinkedCodeBlock->isClassContext()) { |
| derivedContextType = callerUnlinkedCodeBlock->isConstructor() |
| ? DerivedContextType::DerivedConstructorContext |
| : DerivedContextType::DerivedMethodContext; |
| } |
| |
| EvalContextType evalContextType; |
| if (isFunctionParseMode(callerUnlinkedCodeBlock->parseMode())) |
| evalContextType = EvalContextType::FunctionEvalContext; |
| else if (callerUnlinkedCodeBlock->codeType() == EvalCode) |
| evalContextType = callerUnlinkedCodeBlock->evalContextType(); |
| else |
| evalContextType = EvalContextType::None; |
| |
| EvalExecutable* eval = callerCodeBlock->evalCodeCache().tryGet(callerCodeBlock->isStrictMode(), programSource, derivedContextType, evalContextType, isArrowFunctionContext, 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(!scope.exception()); |
| |
| eval = callerCodeBlock->evalCodeCache().getSlow(callFrame, callerCodeBlock, callerCodeBlock->isStrictMode(), derivedContextType, evalContextType, isArrowFunctionContext, programSource, callerScopeChain); |
| |
| if (!eval) |
| return jsUndefined(); |
| } |
| |
| JSValue thisValue = callerFrame->thisValue(); |
| Interpreter* interpreter = vm.interpreter; |
| return interpreter->execute(eval, callFrame, thisValue, callerScopeChain); |
| } |
| |
| unsigned sizeOfVarargs(CallFrame* callFrame, JSValue arguments, uint32_t firstVarArgOffset) |
| { |
| VM& vm = callFrame->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| if (UNLIKELY(!arguments.isCell())) { |
| if (arguments.isUndefinedOrNull()) |
| return 0; |
| |
| throwException(callFrame, scope, createInvalidFunctionApplyParameterError(callFrame, arguments)); |
| return 0; |
| } |
| |
| 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: |
| case SymbolType: |
| throwException(callFrame, scope, createInvalidFunctionApplyParameterError(callFrame, arguments)); |
| return 0; |
| |
| default: |
| RELEASE_ASSERT(arguments.isObject()); |
| length = getLength(callFrame, jsCast<JSObject*>(cell)); |
| RETURN_IF_EXCEPTION(scope, 0); |
| break; |
| } |
| |
| |
| if (length >= firstVarArgOffset) |
| length -= firstVarArgOffset; |
| else |
| length = 0; |
| |
| return length; |
| } |
| |
| unsigned sizeFrameForForwardArguments(CallFrame* callFrame, VM& vm, unsigned numUsedStackSlots) |
| { |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| unsigned length = callFrame->argumentCount(); |
| CallFrame* calleeFrame = calleeFrameForVarargs(callFrame, numUsedStackSlots, length + 1); |
| if (UNLIKELY(!vm.ensureStackCapacityFor(calleeFrame->registers()))) |
| throwStackOverflowError(callFrame, scope); |
| |
| return length; |
| } |
| |
| unsigned sizeFrameForVarargs(CallFrame* callFrame, VM& vm, JSValue arguments, unsigned numUsedStackSlots, uint32_t firstVarArgOffset) |
| { |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| unsigned length = sizeOfVarargs(callFrame, arguments, firstVarArgOffset); |
| |
| CallFrame* calleeFrame = calleeFrameForVarargs(callFrame, numUsedStackSlots, length + 1); |
| if (UNLIKELY(length > maxArguments || !vm.ensureStackCapacityFor(calleeFrame->registers()))) { |
| throwStackOverflowError(callFrame, scope); |
| return 0; |
| } |
| |
| return length; |
| } |
| |
| void loadVarargs(CallFrame* callFrame, VirtualRegister firstElementDest, JSValue arguments, uint32_t offset, uint32_t length) |
| { |
| if (UNLIKELY(!arguments.isCell()) || !length) |
| 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; |
| } |
| 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; |
| } } |
| } |
| |
| void setupVarargsFrame(CallFrame* callFrame, CallFrame* newCallFrame, JSValue arguments, uint32_t offset, uint32_t length) |
| { |
| VirtualRegister calleeFrameOffset(newCallFrame - callFrame); |
| |
| loadVarargs( |
| callFrame, |
| calleeFrameOffset + CallFrame::argumentOffset(0), |
| arguments, offset, length); |
| |
| newCallFrame->setArgumentCountIncludingThis(length + 1); |
| } |
| |
| void setupVarargsFrameAndSetThis(CallFrame* callFrame, CallFrame* newCallFrame, JSValue thisValue, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length) |
| { |
| setupVarargsFrame(callFrame, newCallFrame, arguments, firstVarArgOffset, length); |
| newCallFrame->setThisValue(thisValue); |
| } |
| |
| void setupForwardArgumentsFrame(CallFrame* execCaller, CallFrame* execCallee, uint32_t length) |
| { |
| ASSERT(length == execCaller->argumentCount()); |
| unsigned offset = execCaller->argumentOffset(0) * sizeof(Register); |
| memcpy(reinterpret_cast<char*>(execCallee) + offset, reinterpret_cast<char*>(execCaller) + offset, length * sizeof(Register)); |
| execCallee->setArgumentCountIncludingThis(length + 1); |
| } |
| |
| void setupForwardArgumentsFrameAndSetThis(CallFrame* execCaller, CallFrame* execCallee, JSValue thisValue, uint32_t length) |
| { |
| setupForwardArgumentsFrame(execCaller, execCallee, length); |
| execCallee->setThisValue(thisValue); |
| } |
| |
| |
| |
| Interpreter::Interpreter(VM& vm) |
| : m_vm(vm) |
| #if !ENABLE(JIT) |
| , m_cloopStack(vm) |
| #endif |
| , m_errorHandlingModeReentry(0) |
| #if !ASSERT_DISABLED |
| , m_initialized(false) |
| #endif |
| { |
| } |
| |
| Interpreter::~Interpreter() |
| { |
| } |
| |
| void Interpreter::initialize() |
| { |
| #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 |
| |
| #if !ASSERT_DISABLED |
| m_initialized = true; |
| #endif |
| } |
| |
| #ifdef NDEBUG |
| |
| void Interpreter::dumpCallFrame(CallFrame*) |
| { |
| } |
| |
| #else |
| |
| void Interpreter::dumpCallFrame(CallFrame* callFrame) |
| { |
| callFrame->codeBlock()->dumpBytecode(); |
| dumpRegisters(callFrame); |
| } |
| |
| class DumpRegisterFunctor { |
| public: |
| DumpRegisterFunctor(const Register*& it) |
| : m_hasSkippedFirstFrame(false) |
| , m_it(it) |
| { |
| } |
| |
| StackVisitor::Status operator()(StackVisitor& visitor) const |
| { |
| 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: |
| mutable bool m_hasSkippedFirstFrame; |
| const Register*& m_it; |
| }; |
| |
| void Interpreter::dumpRegisters(CallFrame* callFrame) |
| { |
| dataLogF("Register frame: \n\n"); |
| dataLogF("-----------------------------------------------------------------------------\n"); |
| dataLogF(" use | address | value \n"); |
| dataLogF("-----------------------------------------------------------------------------\n"); |
| |
| CodeBlock* codeBlock = callFrame->codeBlock(); |
| const Register* it; |
| const Register* end; |
| |
| it = callFrame->registers() + CallFrameSlot::thisArgument + callFrame->argumentCount(); |
| end = callFrame->registers() + CallFrameSlot::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; |
| } |
| |
| 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 |
| |
| 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 { |
| 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); |
| } |
| dataLogF("-----------------------------------------------------------------------------\n"); |
| |
| end = it - codeBlock->m_numCalleeLocals + codeBlock->m_numVars; |
| if (it != end) { |
| do { |
| 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); |
| } |
| dataLogF("-----------------------------------------------------------------------------\n"); |
| } |
| |
| #endif |
| |
| bool Interpreter::isOpcode(Opcode opcode) |
| { |
| #if ENABLE(COMPUTED_GOTO_OPCODES) |
| return opcode != HashTraits<Opcode>::emptyValue() |
| && !HashTraits<Opcode>::isDeletedValue(opcode) |
| && m_opcodeIDTable.contains(opcode); |
| #else |
| return opcode >= 0 && opcode <= op_end; |
| #endif |
| } |
| |
| static inline bool isWebAssemblyExecutable(ExecutableBase* executable) |
| { |
| #if !ENABLE(WEBASSEMBLY) |
| UNUSED_PARAM(executable); |
| return false; |
| #else |
| return executable->isWebAssemblyExecutable(); |
| #endif |
| } |
| |
| class GetStackTraceFunctor { |
| public: |
| GetStackTraceFunctor(VM& vm, Vector<StackFrame>& results, size_t framesToSkip, size_t capacity) |
| : m_vm(vm) |
| , m_results(results) |
| , m_framesToSkip(framesToSkip) |
| , m_remainingCapacityForFrameCapture(capacity) |
| { |
| m_results.reserveInitialCapacity(capacity); |
| } |
| |
| StackVisitor::Status operator()(StackVisitor& visitor) const |
| { |
| if (m_framesToSkip > 0) { |
| m_framesToSkip--; |
| return StackVisitor::Continue; |
| } |
| |
| if (m_remainingCapacityForFrameCapture) { |
| if (visitor->isJSFrame() |
| && !isWebAssemblyExecutable(visitor->codeBlock()->ownerExecutable()) |
| && !visitor->codeBlock()->unlinkedCodeBlock()->isBuiltinFunction()) { |
| StackFrame s = { |
| Strong<JSObject>(m_vm, visitor->callee()), |
| Strong<CodeBlock>(m_vm, visitor->codeBlock()), |
| visitor->bytecodeOffset() |
| }; |
| m_results.append(s); |
| } else { |
| StackFrame s = { |
| Strong<JSObject>(m_vm, visitor->callee()), |
| Strong<CodeBlock>(), |
| 0 // unused value because codeBlock is null. |
| }; |
| m_results.append(s); |
| } |
| |
| m_remainingCapacityForFrameCapture--; |
| return StackVisitor::Continue; |
| } |
| return StackVisitor::Done; |
| } |
| |
| private: |
| VM& m_vm; |
| Vector<StackFrame>& m_results; |
| mutable size_t m_framesToSkip; |
| mutable size_t m_remainingCapacityForFrameCapture; |
| }; |
| |
| void Interpreter::getStackTrace(Vector<StackFrame>& results, size_t framesToSkip, size_t maxStackSize) |
| { |
| VM& vm = m_vm; |
| CallFrame* callFrame = vm.topCallFrame; |
| if (!callFrame) |
| return; |
| |
| size_t framesCount = 0; |
| callFrame->iterate([&] (StackVisitor&) -> StackVisitor::Status { |
| framesCount++; |
| return StackVisitor::Continue; |
| }); |
| if (framesCount <= framesToSkip) |
| return; |
| |
| framesCount -= framesToSkip; |
| framesCount = std::min(maxStackSize, framesCount); |
| |
| GetStackTraceFunctor functor(vm, results, framesToSkip, framesCount); |
| callFrame->iterate(functor); |
| ASSERT(results.size() == results.capacity()); |
| } |
| |
| JSString* Interpreter::stackTraceAsString(VM& vm, const 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(vm))); |
| if (i != stackTrace.size() - 1) |
| builder.append('\n'); |
| } |
| return jsString(&vm, builder.toString()); |
| } |
| |
| ALWAYS_INLINE static HandlerInfo* findExceptionHandler(StackVisitor& visitor, CodeBlock* codeBlock, RequiredHandler requiredHandler) |
| { |
| ASSERT(codeBlock); |
| #if ENABLE(DFG_JIT) |
| ASSERT(!visitor->isInlinedFrame()); |
| #endif |
| |
| CallFrame* callFrame = visitor->callFrame(); |
| unsigned exceptionHandlerIndex; |
| if (JITCode::isOptimizingJIT(codeBlock->jitType())) |
| exceptionHandlerIndex = callFrame->callSiteIndex().bits(); |
| else |
| exceptionHandlerIndex = callFrame->bytecodeOffset(); |
| |
| return codeBlock->handlerForIndex(exceptionHandlerIndex, requiredHandler); |
| } |
| |
| class GetCatchHandlerFunctor { |
| public: |
| GetCatchHandlerFunctor() |
| : m_handler(0) |
| { |
| } |
| |
| HandlerInfo* handler() { return m_handler; } |
| |
| StackVisitor::Status operator()(StackVisitor& visitor) const |
| { |
| visitor.unwindToMachineCodeBlockFrame(); |
| |
| CodeBlock* codeBlock = visitor->codeBlock(); |
| if (!codeBlock) |
| return StackVisitor::Continue; |
| |
| m_handler = findExceptionHandler(visitor, codeBlock, RequiredHandler::CatchHandler); |
| if (m_handler) |
| return StackVisitor::Done; |
| |
| return StackVisitor::Continue; |
| } |
| |
| private: |
| mutable HandlerInfo* m_handler; |
| }; |
| |
| ALWAYS_INLINE static void notifyDebuggerOfUnwinding(CallFrame* callFrame) |
| { |
| VM& vm = callFrame->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| if (Debugger* debugger = callFrame->vmEntryGlobalObject()->debugger()) { |
| SuspendExceptionScope scope(&vm); |
| if (jsDynamicCast<JSFunction*>(callFrame->callee())) |
| debugger->returnEvent(callFrame); |
| else |
| debugger->didExecuteProgram(callFrame); |
| ASSERT_UNUSED(throwScope, !throwScope.exception()); |
| } |
| } |
| |
| class UnwindFunctor { |
| public: |
| UnwindFunctor(CallFrame*& callFrame, bool isTermination, CodeBlock*& codeBlock, HandlerInfo*& handler) |
| : m_callFrame(callFrame) |
| , m_isTermination(isTermination) |
| , m_codeBlock(codeBlock) |
| , m_handler(handler) |
| { |
| } |
| |
| StackVisitor::Status operator()(StackVisitor& visitor) const |
| { |
| visitor.unwindToMachineCodeBlockFrame(); |
| m_callFrame = visitor->callFrame(); |
| m_codeBlock = visitor->codeBlock(); |
| |
| m_handler = nullptr; |
| if (!m_isTermination) { |
| if (m_codeBlock && !isWebAssemblyExecutable(m_codeBlock->ownerExecutable())) |
| m_handler = findExceptionHandler(visitor, m_codeBlock, RequiredHandler::AnyHandler); |
| } |
| |
| if (m_handler) |
| return StackVisitor::Done; |
| |
| notifyDebuggerOfUnwinding(m_callFrame); |
| |
| bool shouldStopUnwinding = visitor->callerIsVMEntryFrame(); |
| if (shouldStopUnwinding) { |
| copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(visitor); |
| |
| return StackVisitor::Done; |
| } |
| |
| copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(visitor); |
| |
| return StackVisitor::Continue; |
| } |
| |
| private: |
| void copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(StackVisitor& visitor) const |
| { |
| #if ENABLE(JIT) && NUMBER_OF_CALLEE_SAVES_REGISTERS > 0 |
| |
| if (!visitor->isJSFrame()) |
| return; |
| |
| #if ENABLE(DFG_JIT) |
| if (visitor->inlineCallFrame()) |
| return; |
| #endif |
| RegisterAtOffsetList* currentCalleeSaves = m_codeBlock ? m_codeBlock->calleeSaveRegisters() : nullptr; |
| |
| if (!currentCalleeSaves) |
| return; |
| |
| VM& vm = m_callFrame->vm(); |
| RegisterAtOffsetList* allCalleeSaves = vm.getAllCalleeSaveRegisterOffsets(); |
| RegisterSet dontCopyRegisters = RegisterSet::stackRegisters(); |
| intptr_t* frame = reinterpret_cast<intptr_t*>(m_callFrame->registers()); |
| |
| unsigned registerCount = currentCalleeSaves->size(); |
| VMEntryRecord* record = vmEntryRecord(vm.topVMEntryFrame); |
| for (unsigned i = 0; i < registerCount; i++) { |
| RegisterAtOffset currentEntry = currentCalleeSaves->at(i); |
| if (dontCopyRegisters.get(currentEntry.reg())) |
| continue; |
| RegisterAtOffset* calleeSavesEntry = allCalleeSaves->find(currentEntry.reg()); |
| |
| record->calleeSaveRegistersBuffer[calleeSavesEntry->offsetAsIndex()] = *(frame + currentEntry.offsetAsIndex()); |
| } |
| #else |
| UNUSED_PARAM(visitor); |
| #endif |
| } |
| |
| CallFrame*& m_callFrame; |
| bool m_isTermination; |
| CodeBlock*& m_codeBlock; |
| HandlerInfo*& m_handler; |
| }; |
| |
| NEVER_INLINE HandlerInfo* Interpreter::unwind(VM& vm, CallFrame*& callFrame, Exception* exception, UnwindStart unwindStart) |
| { |
| auto scope = DECLARE_CATCH_SCOPE(vm); |
| |
| if (unwindStart == UnwindFromCallerFrame) { |
| if (callFrame->callerFrameOrVMEntryFrame() == vm.topVMEntryFrame) |
| return nullptr; |
| |
| callFrame = callFrame->callerFrame(); |
| vm.topCallFrame = callFrame; |
| } |
| |
| CodeBlock* codeBlock = callFrame->codeBlock(); |
| |
| 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(); |
| |
| ASSERT_UNUSED(scope, scope.exception() && scope.exception()->stack().size()); |
| |
| // Calculate an exception handler vPC, unwinding call frames as necessary. |
| HandlerInfo* handler = nullptr; |
| UnwindFunctor functor(callFrame, isTerminatedExecutionException(exception), codeBlock, handler); |
| callFrame->iterate(functor); |
| if (!handler) |
| return nullptr; |
| |
| return handler; |
| } |
| |
| void Interpreter::notifyDebuggerOfExceptionToBeThrown(CallFrame* callFrame, Exception* exception) |
| { |
| Debugger* debugger = callFrame->vmEntryGlobalObject()->debugger(); |
| if (debugger && debugger->needsExceptionCallbacks() && !exception->didNotifyInspectorOfThrow()) { |
| // 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; |
| bool isTermination = isTerminatedExecutionException(exception); |
| if (isTermination) |
| hasCatchHandler = false; |
| else { |
| GetCatchHandlerFunctor functor; |
| callFrame->iterate(functor); |
| HandlerInfo* handler = functor.handler(); |
| ASSERT(!handler || handler->isCatchHandler()); |
| hasCatchHandler = !!handler; |
| } |
| |
| debugger->exception(callFrame, exception->value(), hasCatchHandler); |
| } |
| exception->setDidNotifyInspectorOfThrow(); |
| } |
| |
| static inline JSValue checkedReturn(JSValue returnValue) |
| { |
| ASSERT(returnValue); |
| return returnValue; |
| } |
| |
| static inline JSObject* checkedReturn(JSObject* returnValue) |
| { |
| ASSERT(returnValue); |
| return returnValue; |
| } |
| |
| JSValue Interpreter::execute(ProgramExecutable* program, CallFrame* callFrame, JSObject* thisObj) |
| { |
| JSScope* scope = thisObj->globalObject()->globalScope(); |
| VM& vm = *scope->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| ASSERT(!throwScope.exception()); |
| ASSERT(!vm.isCollectorBusy()); |
| RELEASE_ASSERT(vm.currentThreadIsHoldingAPILock()); |
| if (vm.isCollectorBusy()) |
| return jsNull(); |
| |
| if (UNLIKELY(!vm.isSafeToRecurseSoft())) |
| return checkedReturn(throwStackOverflowError(callFrame, throwScope)); |
| |
| // 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; |
| StringView programSource = program->source().view(); |
| 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<JSONPPathEntry> JSONPPath; |
| JSONPPath.swap(JSONPData[entry].m_path); |
| JSValue JSONPValue = JSONPData[entry].m_value.get(); |
| 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 != JSONPPathEntryTypeDeclare); |
| switch (JSONPPath[i].m_type) { |
| case JSONPPathEntryTypeDot: { |
| if (i == 0) { |
| PropertySlot slot(globalObject, PropertySlot::InternalMethodType::Get); |
| if (!globalObject->getPropertySlot(callFrame, JSONPPath[i].m_pathEntryName, slot)) { |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| if (entry) |
| return throwException(callFrame, throwScope, createUndefinedVariableError(callFrame, JSONPPath[i].m_pathEntryName)); |
| goto failedJSONP; |
| } |
| baseObject = slot.getValue(callFrame, JSONPPath[i].m_pathEntryName); |
| } else |
| baseObject = baseObject.get(callFrame, JSONPPath[i].m_pathEntryName); |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| continue; |
| } |
| case JSONPPathEntryTypeLookup: { |
| baseObject = baseObject.get(callFrame, static_cast<unsigned>(JSONPPath[i].m_pathIndex)); |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| continue; |
| } |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| return jsUndefined(); |
| } |
| } |
| PutPropertySlot slot(baseObject); |
| switch (JSONPPath.last().m_type) { |
| case JSONPPathEntryTypeCall: { |
| JSValue function = baseObject.get(callFrame, JSONPPath.last().m_pathEntryName); |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| CallData callData; |
| CallType callType = getCallData(function, callData); |
| if (callType == CallType::None) |
| return throwException(callFrame, throwScope, createNotAFunctionError(callFrame, function)); |
| MarkedArgumentBuffer jsonArg; |
| jsonArg.append(JSONPValue); |
| JSValue thisValue = JSONPPath.size() == 1 ? jsUndefined(): baseObject; |
| JSONPValue = JSC::call(callFrame, function, callType, callData, thisValue, jsonArg); |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| break; |
| } |
| case JSONPPathEntryTypeDot: { |
| baseObject.put(callFrame, JSONPPath.last().m_pathEntryName, JSONPValue, slot); |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| break; |
| } |
| case JSONPPathEntryTypeLookup: { |
| baseObject.putByIndex(callFrame, JSONPPath.last().m_pathIndex, JSONPValue, slot.isStrictMode()); |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| break; |
| } |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| return jsUndefined(); |
| } |
| result = JSONPValue; |
| } |
| return result; |
| } |
| failedJSONP: |
| // If we get here, then we have already proven that the script is not a JSON |
| // object. |
| |
| VMEntryScope entryScope(vm, scope->globalObject()); |
| |
| // Compile source to bytecode if necessary: |
| if (JSObject* error = program->initializeGlobalProperties(vm, callFrame, scope)) |
| return checkedReturn(throwException(callFrame, throwScope, error)); |
| |
| ProgramCodeBlock* codeBlock; |
| { |
| CodeBlock* tempCodeBlock; |
| JSObject* error = program->prepareForExecution<ProgramExecutable>(callFrame, nullptr, scope, CodeForCall, tempCodeBlock); |
| ASSERT(!throwScope.exception() || throwScope.exception() == jsDynamicCast<Exception*>(error)); |
| if (error) |
| return checkedReturn(throwException(callFrame, throwScope, error)); |
| codeBlock = jsCast<ProgramCodeBlock*>(tempCodeBlock); |
| } |
| |
| if (UNLIKELY(vm.shouldTriggerTermination(callFrame))) |
| return throwTerminatedExecutionException(callFrame, throwScope); |
| |
| if (scope->structure()->isUncacheableDictionary()) |
| scope->flattenDictionaryObject(vm); |
| |
| ASSERT(codeBlock->numParameters() == 1); // 1 parameter for 'this'. |
| |
| ProtoCallFrame protoCallFrame; |
| protoCallFrame.init(codeBlock, JSCallee::create(vm, scope->globalObject(), scope), thisObj, 1); |
| |
| // Execute the code: |
| JSValue result = program->generatedJITCode()->execute(&vm, &protoCallFrame); |
| throwScope.release(); |
| return checkedReturn(result); |
| } |
| |
| JSValue Interpreter::executeCall(CallFrame* callFrame, JSObject* function, CallType callType, const CallData& callData, JSValue thisValue, const ArgList& args) |
| { |
| VM& vm = callFrame->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| ASSERT(!throwScope.exception()); |
| ASSERT(!vm.isCollectorBusy()); |
| if (vm.isCollectorBusy()) |
| return jsNull(); |
| |
| bool isJSCall = (callType == CallType::JS); |
| JSScope* scope = nullptr; |
| CodeBlock* newCodeBlock; |
| size_t argsCount = 1 + args.size(); // implicit "this" parameter |
| |
| JSGlobalObject* globalObject; |
| |
| if (isJSCall) { |
| scope = callData.js.scope; |
| globalObject = scope->globalObject(); |
| } else { |
| ASSERT(callType == CallType::Host); |
| globalObject = function->globalObject(); |
| } |
| |
| VMEntryScope entryScope(vm, globalObject); |
| if (UNLIKELY(!vm.isSafeToRecurseSoft())) |
| return checkedReturn(throwStackOverflowError(callFrame, throwScope)); |
| |
| if (isJSCall) { |
| // Compile the callee: |
| JSObject* compileError = callData.js.functionExecutable->prepareForExecution<FunctionExecutable>(callFrame, jsCast<JSFunction*>(function), scope, CodeForCall, newCodeBlock); |
| ASSERT(throwScope.exception() == reinterpret_cast<Exception*>(compileError)); |
| if (UNLIKELY(!!compileError)) |
| return checkedReturn(throwException(callFrame, throwScope, compileError)); |
| |
| ASSERT(!!newCodeBlock); |
| newCodeBlock->m_shouldAlwaysBeInlined = false; |
| } else |
| newCodeBlock = 0; |
| |
| if (UNLIKELY(vm.shouldTriggerTermination(callFrame))) |
| return throwTerminatedExecutionException(callFrame, throwScope); |
| |
| ProtoCallFrame protoCallFrame; |
| protoCallFrame.init(newCodeBlock, function, thisValue, argsCount, args.data()); |
| |
| JSValue result; |
| { |
| // Execute the code: |
| if (isJSCall) { |
| result = callData.js.functionExecutable->generatedJITCodeForCall()->execute(&vm, &protoCallFrame); |
| throwScope.release(); |
| } else { |
| result = JSValue::decode(vmEntryToNative(reinterpret_cast<void*>(callData.native.function), &vm, &protoCallFrame)); |
| RETURN_IF_EXCEPTION(throwScope, JSValue()); |
| } |
| } |
| |
| return checkedReturn(result); |
| } |
| |
| JSObject* Interpreter::executeConstruct(CallFrame* callFrame, JSObject* constructor, ConstructType constructType, const ConstructData& constructData, const ArgList& args, JSValue newTarget) |
| { |
| VM& vm = callFrame->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| ASSERT(!throwScope.exception()); |
| ASSERT(!vm.isCollectorBusy()); |
| // We throw in this case because we have to return something "valid" but we're |
| // already in an invalid state. |
| if (vm.isCollectorBusy()) |
| return checkedReturn(throwStackOverflowError(callFrame, throwScope)); |
| |
| bool isJSConstruct = (constructType == ConstructType::JS); |
| JSScope* scope = nullptr; |
| CodeBlock* newCodeBlock; |
| size_t argsCount = 1 + args.size(); // implicit "this" parameter |
| |
| JSGlobalObject* globalObject; |
| |
| if (isJSConstruct) { |
| scope = constructData.js.scope; |
| globalObject = scope->globalObject(); |
| } else { |
| ASSERT(constructType == ConstructType::Host); |
| globalObject = constructor->globalObject(); |
| } |
| |
| VMEntryScope entryScope(vm, globalObject); |
| if (UNLIKELY(!vm.isSafeToRecurseSoft())) |
| return checkedReturn(throwStackOverflowError(callFrame, throwScope)); |
| |
| if (isJSConstruct) { |
| // Compile the callee: |
| JSObject* compileError = constructData.js.functionExecutable->prepareForExecution<FunctionExecutable>(callFrame, jsCast<JSFunction*>(constructor), scope, CodeForConstruct, newCodeBlock); |
| if (UNLIKELY(!!compileError)) |
| return checkedReturn(throwException(callFrame, throwScope, compileError)); |
| |
| ASSERT(!!newCodeBlock); |
| newCodeBlock->m_shouldAlwaysBeInlined = false; |
| } else |
| newCodeBlock = 0; |
| |
| if (UNLIKELY(vm.shouldTriggerTermination(callFrame))) |
| return throwTerminatedExecutionException(callFrame, throwScope); |
| |
| ProtoCallFrame protoCallFrame; |
| protoCallFrame.init(newCodeBlock, constructor, newTarget, argsCount, args.data()); |
| |
| JSValue result; |
| { |
| // 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 (LIKELY(!throwScope.exception())) |
| RELEASE_ASSERT(result.isObject()); |
| } |
| } |
| |
| RETURN_IF_EXCEPTION(throwScope, 0); |
| ASSERT(result.isObject()); |
| return checkedReturn(asObject(result)); |
| } |
| |
| CallFrameClosure Interpreter::prepareForRepeatCall(FunctionExecutable* functionExecutable, CallFrame* callFrame, ProtoCallFrame* protoCallFrame, JSFunction* function, int argumentCountIncludingThis, JSScope* scope, JSValue* args) |
| { |
| VM& vm = *scope->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| ASSERT(!throwScope.exception()); |
| |
| if (vm.isCollectorBusy()) |
| return CallFrameClosure(); |
| |
| // Compile the callee: |
| CodeBlock* newCodeBlock; |
| JSObject* error = functionExecutable->prepareForExecution<FunctionExecutable>(callFrame, function, scope, CodeForCall, newCodeBlock); |
| if (error) { |
| throwException(callFrame, throwScope, error); |
| return CallFrameClosure(); |
| } |
| newCodeBlock->m_shouldAlwaysBeInlined = false; |
| |
| 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) |
| { |
| VM& vm = *closure.vm; |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| ASSERT(!vm.isCollectorBusy()); |
| RELEASE_ASSERT(vm.currentThreadIsHoldingAPILock()); |
| if (vm.isCollectorBusy()) |
| return jsNull(); |
| |
| StackStats::CheckPoint stackCheckPoint; |
| |
| if (UNLIKELY(vm.shouldTriggerTermination(closure.oldCallFrame))) |
| return throwTerminatedExecutionException(closure.oldCallFrame, throwScope); |
| |
| // Execute the code: |
| JSValue result = closure.functionExecutable->generatedJITCodeForCall()->execute(&vm, closure.protoCallFrame); |
| |
| return checkedReturn(result); |
| } |
| |
| JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSValue thisValue, JSScope* scope) |
| { |
| VM& vm = *scope->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| ASSERT(scope->vm() == &callFrame->vm()); |
| ASSERT(!throwScope.exception()); |
| ASSERT(!vm.isCollectorBusy()); |
| RELEASE_ASSERT(vm.currentThreadIsHoldingAPILock()); |
| if (vm.isCollectorBusy()) |
| return jsNull(); |
| |
| VMEntryScope entryScope(vm, scope->globalObject()); |
| if (UNLIKELY(!vm.isSafeToRecurseSoft())) |
| return checkedReturn(throwStackOverflowError(callFrame, throwScope)); |
| |
| 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->isGlobalObject()) { |
| variableObject = node; |
| break; |
| } |
| if (node->isJSLexicalEnvironment()) { |
| JSLexicalEnvironment* lexicalEnvironment = jsCast<JSLexicalEnvironment*>(node); |
| if (lexicalEnvironment->symbolTable()->scopeType() == SymbolTable::ScopeType::VarScope) { |
| variableObject = node; |
| break; |
| } |
| } |
| } |
| } |
| |
| EvalCodeBlock* codeBlock; |
| { |
| CodeBlock* tempCodeBlock; |
| JSObject* compileError = eval->prepareForExecution<EvalExecutable>(callFrame, nullptr, scope, CodeForCall, tempCodeBlock); |
| if (UNLIKELY(!!compileError)) |
| return checkedReturn(throwException(callFrame, throwScope, compileError)); |
| codeBlock = jsCast<EvalCodeBlock*>(tempCodeBlock); |
| } |
| |
| // We can't declare a "var"/"function" that overwrites a global "let"/"const"/"class" in a sloppy-mode eval. |
| if (variableObject->isGlobalObject() && !eval->isStrictMode() && (numVariables || numFunctions)) { |
| JSGlobalLexicalEnvironment* globalLexicalEnvironment = jsCast<JSGlobalObject*>(variableObject)->globalLexicalEnvironment(); |
| for (unsigned i = 0; i < numVariables; ++i) { |
| const Identifier& ident = codeBlock->variable(i); |
| PropertySlot slot(globalLexicalEnvironment, PropertySlot::InternalMethodType::VMInquiry); |
| if (JSGlobalLexicalEnvironment::getOwnPropertySlot(globalLexicalEnvironment, callFrame, ident, slot)) { |
| return checkedReturn(throwTypeError(callFrame, throwScope, makeString("Can't create duplicate global variable in eval: '", String(ident.impl()), "'"))); |
| } |
| } |
| |
| for (int i = 0; i < numFunctions; ++i) { |
| FunctionExecutable* function = codeBlock->functionDecl(i); |
| PropertySlot slot(globalLexicalEnvironment, PropertySlot::InternalMethodType::VMInquiry); |
| if (JSGlobalLexicalEnvironment::getOwnPropertySlot(globalLexicalEnvironment, callFrame, function->name(), slot)) { |
| return checkedReturn(throwTypeError(callFrame, throwScope, makeString("Can't create duplicate global variable in eval: '", String(function->name().impl()), "'"))); |
| } |
| } |
| } |
| |
| if (variableObject->structure()->isUncacheableDictionary()) |
| variableObject->flattenDictionaryObject(vm); |
| |
| if (numVariables || numFunctions) { |
| BatchedTransitionOptimizer optimizer(vm, variableObject); |
| if (variableObject->next() && !eval->isStrictMode()) |
| variableObject->globalObject()->varInjectionWatchpoint()->fireAll(vm, "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); |
| variableObject->methodTable()->put(variableObject, callFrame, ident, jsUndefined(), slot); |
| } |
| } |
| |
| for (int i = 0; i < numFunctions; ++i) { |
| FunctionExecutable* function = codeBlock->functionDecl(i); |
| PutPropertySlot slot(variableObject); |
| variableObject->methodTable()->put(variableObject, callFrame, function->name(), JSFunction::create(vm, function, scope), slot); |
| } |
| } |
| |
| if (UNLIKELY(vm.shouldTriggerTermination(callFrame))) |
| return throwTerminatedExecutionException(callFrame, throwScope); |
| |
| ASSERT(codeBlock->numParameters() == 1); // 1 parameter for 'this'. |
| |
| ProtoCallFrame protoCallFrame; |
| protoCallFrame.init(codeBlock, JSCallee::create(vm, scope->globalObject(), scope), thisValue, 1); |
| |
| // Execute the code: |
| JSValue result = eval->generatedJITCode()->execute(&vm, &protoCallFrame); |
| |
| return checkedReturn(result); |
| } |
| |
| JSValue Interpreter::execute(ModuleProgramExecutable* executable, CallFrame* callFrame, JSModuleEnvironment* scope) |
| { |
| VM& vm = *scope->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| ASSERT(scope->vm() == &callFrame->vm()); |
| ASSERT(!throwScope.exception()); |
| ASSERT(!vm.isCollectorBusy()); |
| RELEASE_ASSERT(vm.currentThreadIsHoldingAPILock()); |
| if (vm.isCollectorBusy()) |
| return jsNull(); |
| |
| VMEntryScope entryScope(vm, scope->globalObject()); |
| if (UNLIKELY(!vm.isSafeToRecurseSoft())) |
| return checkedReturn(throwStackOverflowError(callFrame, throwScope)); |
| |
| ModuleProgramCodeBlock* codeBlock; |
| { |
| CodeBlock* tempCodeBlock; |
| JSObject* compileError = executable->prepareForExecution<ModuleProgramExecutable>(callFrame, nullptr, scope, CodeForCall, tempCodeBlock); |
| if (UNLIKELY(!!compileError)) |
| return checkedReturn(throwException(callFrame, throwScope, compileError)); |
| codeBlock = jsCast<ModuleProgramCodeBlock*>(tempCodeBlock); |
| } |
| |
| if (UNLIKELY(vm.shouldTriggerTermination(callFrame))) |
| return throwTerminatedExecutionException(callFrame, throwScope); |
| |
| if (scope->structure()->isUncacheableDictionary()) |
| scope->flattenDictionaryObject(vm); |
| |
| ASSERT(codeBlock->numParameters() == 1); // 1 parameter for 'this'. |
| |
| // The |this| of the module is always `undefined`. |
| // http://www.ecma-international.org/ecma-262/6.0/#sec-module-environment-records-hasthisbinding |
| // http://www.ecma-international.org/ecma-262/6.0/#sec-module-environment-records-getthisbinding |
| ProtoCallFrame protoCallFrame; |
| protoCallFrame.init(codeBlock, JSCallee::create(vm, scope->globalObject(), scope), jsUndefined(), 1); |
| |
| // Execute the code: |
| JSValue result = executable->generatedJITCode()->execute(&vm, &protoCallFrame); |
| |
| return checkedReturn(result); |
| } |
| |
| NEVER_INLINE void Interpreter::debug(CallFrame* callFrame, DebugHookID debugHookID) |
| { |
| VM& vm = callFrame->vm(); |
| auto scope = DECLARE_CATCH_SCOPE(vm); |
| Debugger* debugger = callFrame->vmEntryGlobalObject()->debugger(); |
| if (!debugger) |
| return; |
| |
| ASSERT(callFrame->codeBlock()->hasDebuggerRequests()); |
| ASSERT_UNUSED(scope, !scope.exception()); |
| |
| switch (debugHookID) { |
| case DidEnterCallFrame: |
| debugger->callEvent(callFrame); |
| break; |
| case WillLeaveCallFrame: |
| debugger->returnEvent(callFrame); |
| break; |
| case WillExecuteStatement: |
| debugger->atStatement(callFrame); |
| break; |
| case WillExecuteProgram: |
| debugger->willExecuteProgram(callFrame); |
| break; |
| case DidExecuteProgram: |
| debugger->didExecuteProgram(callFrame); |
| break; |
| case DidReachBreakpoint: |
| debugger->didReachBreakpoint(callFrame); |
| break; |
| } |
| ASSERT(!scope.exception()); |
| } |
| |
| } // namespace JSC |
