示例#1
0
UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(JSGlobalData& globalData, const Identifier& name, const SourceCode& source, ParserError& error)
{
    SourceCodeKey key = SourceCodeKey(source, name.string(), SourceCodeKey::FunctionType, JSParseNormal);
    CodeCacheMap::AddResult addResult = m_sourceCode.add(key, SourceCodeValue());
    if (!addResult.isNewEntry)
        return jsCast<UnlinkedFunctionExecutable*>(addResult.iterator->value.cell.get());

    RefPtr<ProgramNode> program = parse<ProgramNode>(&globalData, source, 0, Identifier(), JSParseNormal, JSParseProgramCode, error);
    if (!program) {
        ASSERT(error.m_type != ParserError::ErrorNone);
        m_sourceCode.remove(addResult.iterator);
        return 0;
    }

    // This function assumes an input string that would result in a single anonymous function expression.
    StatementNode* exprStatement = program->singleStatement();
    ASSERT(exprStatement);
    ASSERT(exprStatement->isExprStatement());
    ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
    ASSERT(funcExpr);
    RELEASE_ASSERT(funcExpr->isFuncExprNode());
    FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();
    ASSERT(body);
    ASSERT(body->ident().isNull());

    UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&globalData, source, body);
    functionExecutable->m_nameValue.set(globalData, functionExecutable, jsString(&globalData, name.string()));

    addResult.iterator->value = SourceCodeValue(globalData, functionExecutable, m_sourceCode.age());
    return functionExecutable;
}
UnlinkedCodeBlockType* CodeCache::getGlobalCodeBlock(VM& vm, ExecutableType* executable, const SourceCode& source, JSParserStrictness strictness, DebuggerMode debuggerMode, ProfilerMode profilerMode, ParserError& error)
{
    SourceCodeKey key = SourceCodeKey(source, String(), CacheTypes<UnlinkedCodeBlockType>::codeType, strictness);
    CodeCacheMap::AddResult addResult = m_sourceCode.add(key, SourceCodeValue());
    bool canCache = debuggerMode == DebuggerOff && profilerMode == ProfilerOff && !vm.typeProfiler();
    if (!addResult.isNewEntry && canCache) {
        UnlinkedCodeBlockType* unlinkedCodeBlock = jsCast<UnlinkedCodeBlockType*>(addResult.iterator->value.cell.get());
        unsigned firstLine = source.firstLine() + unlinkedCodeBlock->firstLine();
        unsigned lineCount = unlinkedCodeBlock->lineCount();
        unsigned startColumn = unlinkedCodeBlock->startColumn() + source.startColumn();
        bool endColumnIsOnStartLine = !lineCount;
        unsigned endColumn = unlinkedCodeBlock->endColumn() + (endColumnIsOnStartLine ? startColumn : 1);
        executable->recordParse(unlinkedCodeBlock->codeFeatures(), unlinkedCodeBlock->hasCapturedVariables(), firstLine, firstLine + lineCount, startColumn, endColumn);
        return unlinkedCodeBlock;
    }

#if ENABLE(VMOLAB_TIME)
    if (executable->info() == ProgramExecutable::info())
        TimeCounter::start(TimeCounter::TYPEglobparse);
#endif

    typedef typename CacheTypes<UnlinkedCodeBlockType>::RootNode RootNode;
    RefPtr<RootNode> rootNode = parse<RootNode>(&vm, source, 0, Identifier(), strictness, JSParseProgramCode, error);

#if ENABLE(VMOLAB_TIME)
    if (executable->info() == ProgramExecutable::info())
        TimeCounter::stop(TimeCounter::TYPEglobparse);
#endif

    if (!rootNode) {
        m_sourceCode.remove(addResult.iterator);
        return 0;
    }
    unsigned lineCount = rootNode->lastLine() - rootNode->lineNo();
    unsigned startColumn = rootNode->startColumn() + 1;
    bool endColumnIsOnStartLine = !lineCount;
    unsigned unlinkedEndColumn = rootNode->endColumn();
    unsigned endColumn = unlinkedEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
    executable->recordParse(rootNode->features(), rootNode->hasCapturedVariables(), rootNode->lineNo(), rootNode->lastLine(), startColumn, endColumn);

    UnlinkedCodeBlockType* unlinkedCodeBlock = UnlinkedCodeBlockType::create(&vm, executable->executableInfo());
    unlinkedCodeBlock->recordParse(rootNode->features(), rootNode->hasCapturedVariables(), rootNode->lineNo() - source.firstLine(), lineCount, unlinkedEndColumn);

    OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(vm, rootNode.get(), unlinkedCodeBlock, debuggerMode, profilerMode)));
    error = generator->generate();
    rootNode->destroyData();
    if (error.m_type != ParserError::ErrorNone) {
        m_sourceCode.remove(addResult.iterator);
        return 0;
    }

    if (!canCache) {
        m_sourceCode.remove(addResult.iterator);
        return unlinkedCodeBlock;
    }

    addResult.iterator->value = SourceCodeValue(vm, unlinkedCodeBlock, m_sourceCode.age());
    return unlinkedCodeBlock;
}
示例#3
0
// FIXME: There's no need to add the function's name to the key here. It's already in the source code.
UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(VM& vm, const Identifier& name, const SourceCode& source, ParserError& error)
{
    SourceCodeKey key = SourceCodeKey(
        source, name.string(), SourceCodeKey::FunctionType, 
        JSParserBuiltinMode::NotBuiltin, 
        JSParserStrictMode::NotStrict);
    SourceCodeValue* cache = m_sourceCode.findCacheAndUpdateAge(key);
    if (cache)
        return jsCast<UnlinkedFunctionExecutable*>(cache->cell.get());

    JSTextPosition positionBeforeLastNewline;
    std::unique_ptr<ProgramNode> program = parse<ProgramNode>(
        &vm, source, Identifier(), JSParserBuiltinMode::NotBuiltin,
        JSParserStrictMode::NotStrict, SourceParseMode::ProgramMode, SuperBinding::NotNeeded,
        error, &positionBeforeLastNewline);
    if (!program) {
        RELEASE_ASSERT(error.isValid());
        return nullptr;
    }

    // This function assumes an input string that would result in a single function declaration.
    StatementNode* statement = program->singleStatement();
    ASSERT(statement);
    ASSERT(statement->isBlock());
    if (!statement || !statement->isBlock())
        return nullptr;

    StatementNode* funcDecl = static_cast<BlockNode*>(statement)->singleStatement();
    ASSERT(funcDecl);
    ASSERT(funcDecl->isFuncDeclNode());
    if (!funcDecl || !funcDecl->isFuncDeclNode())
        return nullptr;

    FunctionMetadataNode* metadata = static_cast<FuncDeclNode*>(funcDecl)->metadata();
    ASSERT(metadata);
    if (!metadata)
        return nullptr;
    
    metadata->setEndPosition(positionBeforeLastNewline);
    // The Function constructor only has access to global variables, so no variables will be under TDZ.
    VariableEnvironment emptyTDZVariables;
    UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&vm, source, metadata, UnlinkedNormalFunction, ConstructAbility::CanConstruct, GeneratorThisMode::NonEmpty, emptyTDZVariables, false);
    functionExecutable->m_nameValue.set(vm, functionExecutable, jsString(&vm, name.string()));

    m_sourceCode.addCache(key, SourceCodeValue(vm, functionExecutable, m_sourceCode.age()));
    return functionExecutable;
}
示例#4
0
UnlinkedCodeBlockType* CodeCache::getGlobalCodeBlock(VM& vm, ExecutableType* executable, const SourceCode& source, JSParserBuiltinMode builtinMode, JSParserStrictMode strictMode, ThisTDZMode thisTDZMode, bool, DebuggerMode debuggerMode, ProfilerMode profilerMode, ParserError& error, const VariableEnvironment* variablesUnderTDZ)
{
    SourceCodeKey key = SourceCodeKey(source, String(), CacheTypes<UnlinkedCodeBlockType>::codeType, builtinMode, strictMode, thisTDZMode);
    SourceCodeValue* cache = m_sourceCode.findCacheAndUpdateAge(key);
    bool canCache = debuggerMode == DebuggerOff && profilerMode == ProfilerOff && !vm.typeProfiler() && !vm.controlFlowProfiler();
    if (cache && canCache) {
        UnlinkedCodeBlockType* unlinkedCodeBlock = jsCast<UnlinkedCodeBlockType*>(cache->cell.get());
        unsigned firstLine = source.firstLine() + unlinkedCodeBlock->firstLine();
        unsigned lineCount = unlinkedCodeBlock->lineCount();
        unsigned startColumn = unlinkedCodeBlock->startColumn() + source.startColumn();
        bool endColumnIsOnStartLine = !lineCount;
        unsigned endColumn = unlinkedCodeBlock->endColumn() + (endColumnIsOnStartLine ? startColumn : 1);
        executable->recordParse(unlinkedCodeBlock->codeFeatures(), unlinkedCodeBlock->hasCapturedVariables(), firstLine, firstLine + lineCount, startColumn, endColumn);
        return unlinkedCodeBlock;
    }

    typedef typename CacheTypes<UnlinkedCodeBlockType>::RootNode RootNode;
    std::unique_ptr<RootNode> rootNode = parse<RootNode>(
        &vm, source, Identifier(), builtinMode, strictMode,
        CacheTypes<UnlinkedCodeBlockType>::parseMode, SuperBinding::NotNeeded, error, nullptr, ConstructorKind::None, thisTDZMode);
    if (!rootNode)
        return nullptr;

    unsigned lineCount = rootNode->lastLine() - rootNode->firstLine();
    unsigned startColumn = rootNode->startColumn() + 1;
    bool endColumnIsOnStartLine = !lineCount;
    unsigned unlinkedEndColumn = rootNode->endColumn();
    unsigned endColumn = unlinkedEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
    unsigned arrowContextFeature = executable->isArrowFunctionContext() ? ArrowFunctionContextFeature : 0;
    executable->recordParse(rootNode->features() | arrowContextFeature, rootNode->hasCapturedVariables(), rootNode->firstLine(), rootNode->lastLine(), startColumn, endColumn);

    UnlinkedCodeBlockType* unlinkedCodeBlock = UnlinkedCodeBlockType::create(&vm, executable->executableInfo());
    unlinkedCodeBlock->recordParse(rootNode->features(), rootNode->hasCapturedVariables(), rootNode->firstLine() - source.firstLine(), lineCount, unlinkedEndColumn);

    auto generator = std::make_unique<BytecodeGenerator>(vm, rootNode.get(), unlinkedCodeBlock, debuggerMode, profilerMode, variablesUnderTDZ);
    error = generator->generate();
    if (error.isValid())
        return nullptr;

    if (!canCache)
        return unlinkedCodeBlock;

    m_sourceCode.addCache(key, SourceCodeValue(vm, unlinkedCodeBlock, m_sourceCode.age()));
    return unlinkedCodeBlock;
}
示例#5
0
UnlinkedCodeBlockType* CodeCache::getCodeBlock(JSGlobalData& globalData, JSScope* scope, ExecutableType* executable, const SourceCode& source, JSParserStrictness strictness, DebuggerMode debuggerMode, ProfilerMode profilerMode, ParserError& error)
{
    SourceCodeKey key = SourceCodeKey(source, String(), CacheTypes<UnlinkedCodeBlockType>::codeType, strictness);
    CodeCacheMap::AddResult addResult = m_sourceCode.add(key, SourceCodeValue());
    bool canCache = debuggerMode == DebuggerOff && profilerMode == ProfilerOff;
    if (!addResult.isNewEntry && canCache) {
        UnlinkedCodeBlockType* unlinkedCode = jsCast<UnlinkedCodeBlockType*>(addResult.iterator->value.cell.get());
        unsigned firstLine = source.firstLine() + unlinkedCode->firstLine();
        executable->recordParse(unlinkedCode->codeFeatures(), unlinkedCode->hasCapturedVariables(), firstLine, firstLine + unlinkedCode->lineCount());
        return unlinkedCode;
    }

    typedef typename CacheTypes<UnlinkedCodeBlockType>::RootNode RootNode;
    RefPtr<RootNode> rootNode = parse<RootNode>(&globalData, source, 0, Identifier(), strictness, JSParseProgramCode, error);
    if (!rootNode) {
        m_sourceCode.remove(addResult.iterator);
        return 0;
    }
    executable->recordParse(rootNode->features(), rootNode->hasCapturedVariables(), rootNode->lineNo(), rootNode->lastLine());

    UnlinkedCodeBlockType* unlinkedCode = UnlinkedCodeBlockType::create(&globalData, executable->executableInfo());
    unlinkedCode->recordParse(rootNode->features(), rootNode->hasCapturedVariables(), rootNode->lineNo() - source.firstLine(), rootNode->lastLine() - rootNode->lineNo());
    OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(globalData, scope, rootNode.get(), unlinkedCode, debuggerMode, profilerMode)));
    error = generator->generate();
    rootNode->destroyData();
    if (error.m_type != ParserError::ErrorNone) {
        m_sourceCode.remove(addResult.iterator);
        return 0;
    }

    if (!canCache) {
        m_sourceCode.remove(addResult.iterator);
        return unlinkedCode;
    }

    addResult.iterator->value = SourceCodeValue(globalData, unlinkedCode, m_sourceCode.age());
    return unlinkedCode;
}