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;
}
// 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;
}
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;
}
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;
}