PassRefPtr<ScriptCallStack> createScriptCallStackFromException(JSC::ExecState* exec, JSC::JSValue& exception, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
RefCountedArray<StackFrame> stackTrace = exec->vm().exceptionStack();
for (size_t i = 0; i < stackTrace.size() && i < maxStackSize; i++) {
if (!stackTrace[i].callee && frames.size())
break;
String functionName = stackTrace[i].friendlyFunctionName(exec);
unsigned line;
unsigned column;
stackTrace[i].computeLineAndColumn(line, column);
frames.append(ScriptCallFrame(functionName, stackTrace[i].sourceURL, line, column));
}
// FIXME: <http://webkit.org/b/115087> Web Inspector: WebCore::reportException should not evaluate JavaScript handling exceptions
// Fallback to getting at least the line and sourceURL from the exception if it has values and the exceptionStack doesn't.
if (frames.size() > 0) {
const ScriptCallFrame& firstCallFrame = frames.first();
JSObject* exceptionObject = exception.toObject(exec);
if (exception.isObject() && firstCallFrame.sourceURL().isEmpty()) {
JSValue lineValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "line"));
int lineNumber = lineValue && lineValue.isNumber() ? int(lineValue.toNumber(exec)) : 0;
JSValue sourceURLValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "sourceURL"));
String exceptionSourceURL = sourceURLValue && sourceURLValue.isString() ? sourceURLValue.toString(exec)->value(exec) : ASCIILiteral("undefined");
frames[0] = ScriptCallFrame(firstCallFrame.functionName(), exceptionSourceURL, lineNumber, 0);
}
}
return ScriptCallStack::create(frames);
}
void JSGlobalObjectInspectorController::appendAPIBacktrace(ScriptCallStack* callStack)
{
#if OS(DARWIN) || (OS(LINUX) && !PLATFORM(GTK))
static const int framesToShow = 31;
static const int framesToSkip = 3; // WTFGetBacktrace, appendAPIBacktrace, reportAPIException.
void* samples[framesToShow + framesToSkip];
int frames = framesToShow + framesToSkip;
WTFGetBacktrace(samples, &frames);
void** stack = samples + framesToSkip;
int size = frames - framesToSkip;
for (int i = 0; i < size; ++i) {
const char* mangledName = nullptr;
char* cxaDemangled = nullptr;
Dl_info info;
if (dladdr(stack[i], &info) && info.dli_sname)
mangledName = info.dli_sname;
if (mangledName)
cxaDemangled = abi::__cxa_demangle(mangledName, nullptr, nullptr, nullptr);
if (mangledName || cxaDemangled)
callStack->append(ScriptCallFrame(cxaDemangled ? cxaDemangled : mangledName, ASCIILiteral("[native code]"), 0, 0));
else
callStack->append(ScriptCallFrame(ASCIILiteral("?"), ASCIILiteral("[native code]"), 0, 0));
free(cxaDemangled);
}
#else
UNUSED_PARAM(callStack);
#endif
}
PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
CallFrame* callFrame = exec;
while (true) {
ASSERT(callFrame);
int signedLineNumber;
intptr_t sourceID;
String urlString;
JSValue function;
exec->interpreter()->retrieveLastCaller(callFrame, signedLineNumber, sourceID, urlString, function);
String functionName;
if (function)
functionName = jsCast<JSFunction*>(function)->name(exec);
else {
// Caller is unknown, but if frames is empty we should still add the frame, because
// something called us, and gave us arguments.
if (!frames.isEmpty())
break;
}
unsigned lineNumber = signedLineNumber >= 0 ? signedLineNumber : 0;
frames.append(ScriptCallFrame(functionName, urlString, lineNumber));
if (!function || frames.size() == maxStackSize)
break;
callFrame = callFrame->callerFrame();
}
return ScriptCallStack::create(frames);
}
PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyIsAllowed)
{
Vector<ScriptCallFrame> frames;
if (JSC::ExecState* exec = JSMainThreadExecState::currentState()) {
Vector<StackFrame> stackTrace;
Interpreter::getStackTrace(&exec->vm(), stackTrace, maxStackSize);
for (size_t i = 0; i < stackTrace.size(); i++)
frames.append(ScriptCallFrame(stackTrace[i].friendlyFunctionName(exec), stackTrace[i].friendlySourceURL(), stackTrace[i].line(), stackTrace[i].column()));
}
if (frames.isEmpty() && !emptyIsAllowed) {
// No frames found. It may happen in the case where
// a bound function is called from native code for example.
// Fallback to setting lineNumber to 0, and source and function name to "undefined".
frames.append(ScriptCallFrame("undefined", "undefined", 0, 0));
}
return ScriptCallStack::create(frames);
}
PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyIsAllowed)
{
Vector<ScriptCallFrame> frames;
if (JSC::ExecState* exec = JSMainThreadExecState::currentState()) {
CallFrame* frame = exec->vm().topCallFrame;
for (StackIterator iter = frame->begin(); iter != frame->end() && maxStackSize--; ++iter) {
unsigned line;
unsigned column;
iter->computeLineAndColumn(line, column);
frames.append(ScriptCallFrame(iter->functionName(), iter->sourceURL(), line, column));
}
}
if (frames.isEmpty() && !emptyIsAllowed) {
// No frames found. It may happen in the case where
// a bound function is called from native code for example.
// Fallback to setting lineNumber to 0, and source and function name to "undefined".
frames.append(ScriptCallFrame("undefined", "undefined", 0, 0));
}
return ScriptCallStack::create(frames);
}
PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyIsAllowed)
{
Vector<ScriptCallFrame> frames;
if (JSC::ExecState* exec = JSMainThreadExecState::currentState()) {
Vector<StackFrame> stackTrace;
Interpreter::getStackTrace(&exec->globalData(), stackTrace);
for (Vector<StackFrame>::const_iterator iter = stackTrace.begin(); iter < stackTrace.end(); iter++) {
frames.append(ScriptCallFrame(iter->friendlyFunctionName(exec), iter->friendlySourceURL(), iter->friendlyLineNumber()));
if (frames.size() >= maxStackSize)
break;
}
}
if (frames.isEmpty() && !emptyIsAllowed) {
// No frames found. It may happen in the case where
// a bound function is called from native code for example.
// Fallback to setting lineNumber to 0, and source and function name to "undefined".
frames.append(ScriptCallFrame("undefined", "undefined", 0));
}
return ScriptCallStack::create(frames);
}
Ref<ScriptCallStack> createScriptCallStackFromException(JSC::ExecState* exec, JSC::Exception* exception, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
auto& stackTrace = exception->stack();
VM& vm = exec->vm();
for (size_t i = 0; i < stackTrace.size() && i < maxStackSize; i++) {
unsigned line;
unsigned column;
stackTrace[i].computeLineAndColumn(line, column);
String functionName = stackTrace[i].functionName(vm);
frames.append(ScriptCallFrame(functionName, stackTrace[i].sourceURL(), static_cast<SourceID>(stackTrace[i].sourceID()), line, column));
}
// Fallback to getting at least the line and sourceURL from the exception object if it has values and the exceptionStack doesn't.
if (exception->value().isObject()) {
JSObject* exceptionObject = exception->value().toObject(exec);
ASSERT(exceptionObject);
int lineNumber;
int columnNumber;
String exceptionSourceURL;
if (!frames.size()) {
if (extractSourceInformationFromException(exec, exceptionObject, &lineNumber, &columnNumber, &exceptionSourceURL))
frames.append(ScriptCallFrame(String(), exceptionSourceURL, noSourceID, lineNumber, columnNumber));
} else {
// FIXME: The typical stack trace will have a native frame at the top, and consumers of
// this code already know this (see JSDOMExceptionHandling.cpp's reportException, for
// example - it uses firstNonNativeCallFrame). This looks like it splats something else
// over it. That something else is probably already at stackTrace[1].
// https://bugs.webkit.org/show_bug.cgi?id=176663
if (!stackTrace[0].hasLineAndColumnInfo() || stackTrace[0].sourceURL().isEmpty()) {
const ScriptCallFrame& firstCallFrame = frames.first();
if (extractSourceInformationFromException(exec, exceptionObject, &lineNumber, &columnNumber, &exceptionSourceURL))
frames[0] = ScriptCallFrame(firstCallFrame.functionName(), exceptionSourceURL, stackTrace[0].sourceID(), lineNumber, columnNumber);
}
}
}
return ScriptCallStack::create(frames);
}
ScriptCallStack::ScriptCallStack(ExecState* exec, unsigned skipArgumentCount)
: m_initialized(false)
, m_exec(exec)
, m_caller(0)
{
int signedLineNumber;
intptr_t sourceID;
UString urlString;
JSValue function;
exec->interpreter()->retrieveLastCaller(exec, signedLineNumber, sourceID, urlString, function);
unsigned lineNumber = signedLineNumber >= 0 ? signedLineNumber : 0;
if (function) {
m_caller = asFunction(function);
m_frames.append(ScriptCallFrame(m_caller->name(m_exec), urlString, lineNumber, m_exec, skipArgumentCount));
} else {
// Caller is unknown, but we should still add the frame, because
// something called us, and gave us arguments.
m_frames.append(ScriptCallFrame(UString(), urlString, lineNumber, m_exec, skipArgumentCount));
}
}
void ScriptCallStack::initialize()
{
if (!m_caller || m_initialized)
return;
JSValue func = m_exec->interpreter()->retrieveCaller(m_exec, m_caller);
while (!func.isNull()) {
InternalFunction* internalFunction = asInternalFunction(func);
ArgList emptyArgList;
m_frames.append(ScriptCallFrame(internalFunction->name(m_exec), UString(), 0, emptyArgList, 0));
func = m_exec->interpreter()->retrieveCaller(m_exec, internalFunction);
}
m_initialized = true;
}
void JSGlobalObjectInspectorController::appendAPIBacktrace(ScriptCallStack& callStack)
{
#if OS(DARWIN) || (OS(LINUX) && !PLATFORM(GTK))
static const int framesToShow = 31;
static const int framesToSkip = 3; // WTFGetBacktrace, appendAPIBacktrace, reportAPIException.
void* samples[framesToShow + framesToSkip];
int frames = framesToShow + framesToSkip;
WTFGetBacktrace(samples, &frames);
void** stack = samples + framesToSkip;
int size = frames - framesToSkip;
for (int i = 0; i < size; ++i) {
auto demangled = StackTrace::demangle(stack[i]);
if (demangled)
callStack.append(ScriptCallFrame(demangled->demangledName() ? demangled->demangledName() : demangled->mangledName(), ASCIILiteral("[native code]"), noSourceID, 0, 0));
else
callStack.append(ScriptCallFrame(ASCIILiteral("?"), ASCIILiteral("[native code]"), noSourceID, 0, 0));
}
#else
UNUSED_PARAM(callStack);
#endif
}
static ScriptCallFrame toScriptCallFrame(v8::Handle<v8::StackFrame> frame)
{
String sourceName;
v8::Local<v8::String> sourceNameValue(frame->GetScriptNameOrSourceURL());
if (!sourceNameValue.IsEmpty())
sourceName = toWebCoreString(sourceNameValue);
String functionName;
v8::Local<v8::String> functionNameValue(frame->GetFunctionName());
if (!functionNameValue.IsEmpty())
functionName = toWebCoreString(functionNameValue);
int sourceLineNumber = frame->GetLineNumber();
int sourceColumn = frame->GetColumn();
return ScriptCallFrame(functionName, sourceName, sourceLineNumber, sourceColumn);
}
static void toScriptCallFramesVector(v8::Handle<v8::StackTrace> stackTrace, Vector<ScriptCallFrame>& scriptCallFrames, size_t maxStackSize, bool emptyStackIsAllowed, v8::Isolate* isolate)
{
ASSERT(isolate->InContext());
int frameCount = stackTrace->GetFrameCount();
if (frameCount > static_cast<int>(maxStackSize))
frameCount = maxStackSize;
for (int i = 0; i < frameCount; i++) {
v8::Local<v8::StackFrame> stackFrame = stackTrace->GetFrame(i);
scriptCallFrames.append(toScriptCallFrame(stackFrame));
}
if (!frameCount && !emptyStackIsAllowed) {
// Successfully grabbed stack trace, but there are no frames. It may happen in case
// when a bound function is called from native code for example.
// Fallback to setting lineNumber to 0, and source and function name to "undefined".
scriptCallFrames.append(ScriptCallFrame());
}
}
PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
Vector<StackFrame> stackTrace;
Interpreter::getStackTrace(&exec->vm(), stackTrace, maxStackSize + 1);
for (size_t i = stackTrace.size() == 1 ? 0 : 1; i < stackTrace.size(); i++) {
// This early exit is necessary to maintain our old behaviour
// but the stack trace we produce now is complete and handles all
// ways in which code may be running
if (!stackTrace[i].callee && frames.size())
break;
String functionName = stackTrace[i].friendlyFunctionName(exec);
frames.append(ScriptCallFrame(functionName, stackTrace[i].sourceURL, stackTrace[i].line(), stackTrace[i].column()));
}
return ScriptCallStack::create(frames);
}
PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize, bool emptyIsAllowed)
{
Vector<ScriptCallFrame> frames;
if (exec) {
CallFrame* frame = exec->vm().topCallFrame;
CreateScriptCallStackFunctor functor(false, frames, maxStackSize);
frame->iterate(functor);
}
if (frames.isEmpty() && !emptyIsAllowed) {
// No frames found. It may happen in the case where
// a bound function is called from native code for example.
// Fallback to setting lineNumber to 0, and source and function name to "undefined".
frames.append(ScriptCallFrame(ASCIILiteral("undefined"), ASCIILiteral("undefined"), 0, 0));
}
return ScriptCallStack::create(frames);
}
StackVisitor::Status operator()(StackVisitor& visitor)
{
if (m_needToSkipAFrame) {
m_needToSkipAFrame = false;
return StackVisitor::Continue;
}
if (m_remainingCapacityForFrameCapture) {
unsigned line;
unsigned column;
visitor->computeLineAndColumn(line, column);
m_frames.append(ScriptCallFrame(visitor->functionName(), visitor->sourceURL(), line, column));
m_remainingCapacityForFrameCapture--;
return StackVisitor::Continue;
}
return StackVisitor::Done;
}
PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
ASSERT(exec);
CallFrame* frame = exec->vm().topCallFrame;
StackIterator iter = frame->begin();
if (iter.numberOfFrames() > 1)
++iter;
for (; iter != frame->end() && maxStackSize--; ++iter) {
// This early exit is necessary to maintain our old behaviour
// but the stack trace we produce now is complete and handles all
// ways in which code may be running
if (!iter->callee() && frames.size())
break;
unsigned line;
unsigned column;
iter->computeLineAndColumn(line, column);
frames.append(ScriptCallFrame(iter->functionName(), iter->sourceURL(), line, column));
}
return ScriptCallStack::create(frames);
}
static ScriptCallFrame toScriptCallFrame(v8::Handle<v8::StackFrame> frame)
{
StringBuilder stringBuilder;
stringBuilder.appendNumber(frame->GetScriptId());
String scriptId = stringBuilder.toString();
String sourceName;
v8::Local<v8::String> sourceNameValue(frame->GetScriptNameOrSourceURL());
if (!sourceNameValue.IsEmpty()) {
int length = sourceNameValue->Length();
sourceName = StringTraits<String>::fromV8String<V8StringOneByteTrait>(sourceNameValue, length);
}
String functionName;
v8::Local<v8::String> functionNameValue(frame->GetFunctionName());
if (!functionNameValue.IsEmpty())
functionName = toCoreString(functionNameValue);
int sourceLineNumber = frame->GetLineNumber();
int sourceColumn = frame->GetColumn();
return ScriptCallFrame(functionName, scriptId, sourceName, sourceLineNumber, sourceColumn);
}
void ScriptCallStack::initialize()
{
if (!m_caller || m_initialized)
return;
int signedLineNumber;
intptr_t sourceID;
UString urlString;
JSValue function;
// callFrame must exist if m_caller is not null.
CallFrame* callFrame = m_exec->callerFrame();
while (true) {
ASSERT(callFrame);
m_exec->interpreter()->retrieveLastCaller(callFrame, signedLineNumber, sourceID, urlString, function);
if (!function)
break;
JSFunction* jsFunction = asFunction(function);
unsigned lineNumber = signedLineNumber >= 0 ? signedLineNumber : 0;
m_frames.append(ScriptCallFrame(jsFunction->name(m_exec), urlString, lineNumber, m_exec, 0));
callFrame = callFrame->callerFrame();
}
m_initialized = true;
}
