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(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);
}
