CallFrame* CallFrame::trueCallerFrame()
{
// this -> The callee; this is either an inlined callee in which case it already has
// a pointer to the true caller. Otherwise it contains current PC in the machine
// caller.
//
// machineCaller -> The caller according to the machine, which may be zero or
// more frames above the true caller due to inlining.
// Am I an inline call frame? If so, we're done.
if (isInlineCallFrame())
return callerFrame();
// I am a machine call frame, so the question is: is my caller a machine call frame
// that has inlines or a machine call frame that doesn't?
CallFrame* machineCaller = callerFrame()->removeHostCallFrameFlag();
if (!machineCaller)
return 0;
ASSERT(!machineCaller->isInlineCallFrame());
// Figure out how we want to get the current code location.
if (hasHostCallFrameFlag() || returnAddressIsInCtiTrampoline(returnPC()))
return machineCaller->trueCallFrameFromVMCode();
return machineCaller->trueCallFrame(returnPC());
}
