void Lexer::setCode(const SourceCode& source, ParserArena& arena)
{
m_arena = &arena.identifierArena();
m_lineNumber = source.firstLine();
m_delimited = false;
m_lastToken = -1;
const UChar* data = source.provider()->data();
m_source = &source;
m_codeStart = data;
m_code = data + source.startOffset();
m_codeEnd = data + source.endOffset();
m_error = false;
m_atLineStart = true;
// ECMA-262 calls for stripping all Cf characters, but we only strip BOM characters.
// See <https://bugs.webkit.org/show_bug.cgi?id=4931> for details.
if (source.provider()->hasBOMs()) {
for (const UChar* p = m_codeStart; p < m_codeEnd; ++p) {
if (UNLIKELY(*p == byteOrderMark)) {
copyCodeWithoutBOMs();
break;
}
}
}
// Read the first characters into the 4-character buffer.
shift4();
ASSERT(currentOffset() == source.startOffset());
}
void Lexer<T>::setCode(const SourceCode& source, ParserArena* arena)
{
m_arena = &arena->identifierArena();
m_lineNumber = source.firstLine();
m_delimited = false;
m_lastToken = -1;
const StringImpl* sourceString = source.provider()->data();
if (sourceString)
setCodeStart(sourceString);
else
m_codeStart = 0;
m_source = &source;
m_code = m_codeStart + source.startOffset();
m_codeEnd = m_codeStart + source.endOffset();
m_error = false;
m_atLineStart = true;
m_lexErrorMessage = UString();
m_buffer8.reserveInitialCapacity(initialReadBufferCapacity);
m_buffer16.reserveInitialCapacity((m_codeEnd - m_code) / 2);
if (LIKELY(m_code < m_codeEnd))
m_current = *m_code;
else
m_current = -1;
ASSERT(currentOffset() == source.startOffset());
}
// ECMA 15.3.2 The Function Constructor
JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
{
// Functions need to have a space following the opening { due to for web compatibility
// see https://bugs.webkit.org/show_bug.cgi?id=24350
// We also need \n before the closing } to handle // comments at the end of the last line
UString program;
if (args.isEmpty())
program = "(function() { \n})";
else if (args.size() == 1)
program = makeString("(function() { ", args.at(0).toString(exec), "\n})");
else {
StringBuilder builder;
builder.append("(function(");
builder.append(args.at(0).toString(exec));
for (size_t i = 1; i < args.size() - 1; i++) {
builder.append(",");
builder.append(args.at(i).toString(exec));
}
builder.append(") { ");
builder.append(args.at(args.size() - 1).toString(exec));
builder.append("\n})");
program = builder.build();
}
int errLine;
UString errMsg;
SourceCode source = makeSource(program, sourceURL, lineNumber);
RefPtr<FunctionExecutable> function = FunctionExecutable::fromGlobalCode(functionName, exec, exec->dynamicGlobalObject()->debugger(), source, &errLine, &errMsg);
if (!function)
return throwError(exec, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
ScopeChain scopeChain(globalObject, globalObject->globalData(), globalObject, exec->globalThisValue());
return new (exec) JSFunction(exec, function, scopeChain.node());
}
static void initializeOverrideInfo(const SourceCode& origCode, const String& newBody, FunctionOverrides::OverrideInfo& info)
{
String origProviderStr = origCode.provider()->source();
unsigned origBraceStart = origCode.startOffset();
unsigned origFunctionStart = origProviderStr.reverseFind("function", origBraceStart);
unsigned headerLength = origBraceStart - origFunctionStart;
String origHeader = origProviderStr.substring(origFunctionStart, headerLength);
String newProviderStr;
newProviderStr.append(origHeader);
newProviderStr.append(newBody);
RefPtr<SourceProvider> newProvider = StringSourceProvider::create(newProviderStr, "<overridden>");
info.firstLine = 1;
info.lineCount = 1; // Faking it. This doesn't really matter for now.
info.startColumn = 1;
info.endColumn = 1; // Faking it. This doesn't really matter for now.
info.parametersStartOffset = newProviderStr.find("(");
info.typeProfilingStartOffset = newProviderStr.find("{");
info.typeProfilingEndOffset = newProviderStr.length() - 1;
info.sourceCode =
SourceCode(newProvider.release(), info.typeProfilingStartOffset, info.typeProfilingEndOffset + 1, 1, 1);
}
PassOwnPtr<ScheduledAction> ScheduledAction::create(ExecState* exec, DOMWrapperWorld* isolatedWorld, ContentSecurityPolicy* policy)
{
JSValue v = exec->argument(0);
CallData callData;
CallType callType = getCallData(v, callData);
if (callType == CallTypeNone) {
if (policy && !policy->allowEval())
return nullptr;
UString string = v.toString(exec)->value(exec);
if (exec->hadException())
return nullptr;
return adoptPtr(new ScheduledAction(ustringToString(string), isolatedWorld));
}
// WebERA this calculates a unique indification of the called function scheduled in this action.
if (callType == CallTypeJS) {
const SourceCode source = callData.js.functionExecutable->source();
WTF::String url = WebCore::decodeURLEscapeSequences(WTF::String(source.provider()->url().utf8().data()));
uint calledLine = source.firstLine();
return adoptPtr(new ScheduledAction(exec, v, isolatedWorld, url.ascii().data(), calledLine));
}
return adoptPtr(new ScheduledAction(exec, v, isolatedWorld, "<native-function>", -1));
}
// ECMA 15.3.2 The Function Constructor
JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
{
UString program;
if (args.isEmpty())
program = "(function(){})";
else if (args.size() == 1)
program = "(function(){" + args.at(exec, 0)->toString(exec) + "})";
else {
program = "(function(" + args.at(exec, 0)->toString(exec);
for (size_t i = 1; i < args.size() - 1; i++)
program += "," + args.at(exec, i)->toString(exec);
program += "){" + args.at(exec, args.size() - 1)->toString(exec) + "})";
}
int errLine;
UString errMsg;
SourceCode source = makeSource(program, sourceURL, lineNumber);
RefPtr<ProgramNode> programNode = exec->globalData().parser->parse<ProgramNode>(exec, exec->dynamicGlobalObject()->debugger(), source, &errLine, &errMsg);
FunctionBodyNode* body = functionBody(programNode.get());
if (!body)
return throwError(exec, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
ScopeChain scopeChain(globalObject, globalObject->globalData(), exec->globalThisValue());
return new (exec) JSFunction(exec, functionName, body, scopeChain.node());
}
void Lexer::setCode(const SourceCode& source, ParserArena& arena)
{
m_arena = &arena.identifierArena();
m_lineNumber = source.firstLine();
m_delimited = false;
m_lastToken = -1;
const UChar* data = source.provider()->data();
m_source = &source;
m_codeStart = data;
m_code = data + source.startOffset();
m_codeEnd = data + source.endOffset();
m_error = false;
m_atLineStart = true;
m_buffer8.reserveInitialCapacity(initialReadBufferCapacity);
m_buffer16.reserveInitialCapacity((m_codeEnd - m_code) / 2);
if (LIKELY(m_code < m_codeEnd))
m_current = *m_code;
else
m_current = -1;
ASSERT(currentOffset() == source.startOffset());
}
ProgramExecutable::ProgramExecutable(ExecState* exec, const SourceCode& source)
: ScriptExecutable(exec->vm().programExecutableStructure.get(), exec->vm(), source, false, DerivedContextType::None, false, EvalContextType::None, NoIntrinsic)
{
ASSERT(source.provider()->sourceType() == SourceProviderSourceType::Program);
m_typeProfilingStartOffset = 0;
m_typeProfilingEndOffset = source.length() - 1;
if (exec->vm().typeProfiler() || exec->vm().controlFlowProfiler())
exec->vm().functionHasExecutedCache()->insertUnexecutedRange(sourceID(), m_typeProfilingStartOffset, m_typeProfilingEndOffset);
}
WASMModuleParser::WASMModuleParser(VM& vm, JSGlobalObject* globalObject, const SourceCode& source, JSObject* imports, JSArrayBuffer* arrayBuffer)
: m_vm(vm)
, m_globalObject(vm, globalObject)
, m_source(source)
, m_imports(vm, imports)
, m_reader(static_cast<WebAssemblySourceProvider*>(source.provider())->data())
, m_module(vm, JSWASMModule::create(vm, globalObject->wasmModuleStructure(), arrayBuffer))
{
}
JSValue* DebuggerCallFrame::evaluate(const UString& script, JSValue*& exception) const
{
if (!m_callFrame->codeBlock())
return noValue();
int errLine;
UString errMsg;
SourceCode source = makeSource(script);
RefPtr<EvalNode> evalNode = m_callFrame->scopeChain()->globalData->parser->parse<EvalNode>(m_callFrame, m_callFrame->dynamicGlobalObject()->debugger(), source, &errLine, &errMsg);
if (!evalNode)
return Error::create(m_callFrame, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
return m_callFrame->scopeChain()->globalData->interpreter->execute(evalNode.get(), m_callFrame, thisObject(), m_callFrame->scopeChain(), &exception);
}
void WebDebugListenerImpl::sourceParsed(ExecState* execState, const SourceCode& source, int errorLine, const UString& errorMsg)
{
if (m_listener && !m_inDebug) {
m_inDebug = true;
WebCore::String coreSourceURL = WebCore::ustringToString(source.provider()->url());
WebCore::Frame *frame = static_cast<WebCore::JSDOMWindow*>(execState->lexicalGlobalObject())->impl()->frame();
if (!(coreSourceURL.isNull() || coreSourceURL.isEmpty())) {
WebCore::KURL sourceURL(WebCore::ParsedURLString, coreSourceURL);
WebCore::KURL mappedURL;
if(WebCore::FrameLoaderClientApollo::mapFrameUrl(frame, sourceURL, &mappedURL)) {
coreSourceURL = mappedURL.string();
}
}
WebCore::String coreErrorMsg = WebCore::ustringToString(errorMsg);
WebCore::String coreSource(source.data(), source.length());
m_listener->m_pVTable->sourceParsed(m_listener, source.provider()->asID(), coreSourceURL.webString(), coreSource.webString(), source.firstLine(), errorLine, coreErrorMsg.webString());
m_inDebug = false;
}
}
FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, int overrideLineNumber)
{
SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
unsigned firstLine = source.firstLine() + m_firstLineOffset;
unsigned startOffset = source.startOffset() + m_startOffset;
// Adjust to one-based indexing.
bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
bool endColumnIsOnStartLine = !m_lineCount;
unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + m_lineCount, startColumn, endColumn);
if (overrideLineNumber != -1)
result->setOverrideLineNumber(overrideLineNumber);
return result;
}
FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, Optional<int> overrideLineNumber, Intrinsic intrinsic)
{
SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
unsigned firstLine = source.firstLine() + m_firstLineOffset;
unsigned startOffset = source.startOffset() + m_startOffset;
unsigned lineCount = m_lineCount;
// Adjust to one-based indexing.
bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
bool endColumnIsOnStartLine = !lineCount;
unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
FunctionOverrides::OverrideInfo overrideInfo;
bool hasFunctionOverride = false;
if (UNLIKELY(Options::functionOverrides())) {
hasFunctionOverride = FunctionOverrides::initializeOverrideFor(code, overrideInfo);
if (hasFunctionOverride) {
firstLine = overrideInfo.firstLine;
lineCount = overrideInfo.lineCount;
startColumn = overrideInfo.startColumn;
endColumn = overrideInfo.endColumn;
code = overrideInfo.sourceCode;
}
}
FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + lineCount, startColumn, endColumn, intrinsic);
if (overrideLineNumber)
result->setOverrideLineNumber(*overrideLineNumber);
if (UNLIKELY(hasFunctionOverride)) {
result->overrideParameterAndTypeProfilingStartEndOffsets(
overrideInfo.parametersStartOffset,
overrideInfo.typeProfilingStartOffset,
overrideInfo.typeProfilingEndOffset);
}
return result;
}
EvalExecutable::EvalExecutable(ExecState* exec, const SourceCode& source, bool inStrictContext, DerivedContextType derivedContextType, bool isArrowFunctionContext, EvalContextType evalContextType)
: ScriptExecutable(exec->vm().evalExecutableStructure.get(), exec->vm(), source, inStrictContext, derivedContextType, isArrowFunctionContext, evalContextType, NoIntrinsic)
{
ASSERT(source.provider()->sourceType() == SourceProviderSourceType::Program);
}
WASMModuleParser::WASMModuleParser(const SourceCode& source)
: m_reader(static_cast<WebAssemblySourceProvider*>(source.provider())->data())
{
}
