StackFrameSP StackFrameList::GetFrameAtIndex(uint32_t idx) {
StackFrameSP frame_sp;
std::lock_guard<std::recursive_mutex> guard(m_mutex);
uint32_t original_idx = idx;
uint32_t inlined_depth = GetCurrentInlinedDepth();
if (inlined_depth != UINT32_MAX)
idx += inlined_depth;
if (idx < m_frames.size())
frame_sp = m_frames[idx];
if (frame_sp)
return frame_sp;
// GetFramesUpTo will fill m_frames with as many frames as you asked for,
// if there are that many. If there weren't then you asked for too many
// frames.
GetFramesUpTo(idx);
if (idx < m_frames.size()) {
if (m_show_inlined_frames) {
// When inline frames are enabled we actually create all the frames in
// GetFramesUpTo.
frame_sp = m_frames[idx];
} else {
Unwind *unwinder = m_thread.GetUnwinder();
if (unwinder) {
addr_t pc, cfa;
if (unwinder->GetFrameInfoAtIndex(idx, cfa, pc)) {
const bool cfa_is_valid = true;
const bool stop_id_is_valid = false;
const bool is_history_frame = false;
frame_sp.reset(new StackFrame(
m_thread.shared_from_this(), idx, idx, cfa, cfa_is_valid, pc, 0,
stop_id_is_valid, is_history_frame, nullptr));
Function *function =
frame_sp->GetSymbolContext(eSymbolContextFunction).function;
if (function) {
// When we aren't showing inline functions we always use
// the top most function block as the scope.
frame_sp->SetSymbolContextScope(&function->GetBlock(false));
} else {
// Set the symbol scope from the symbol regardless if it is nullptr
// or valid.
frame_sp->SetSymbolContextScope(
frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol);
}
SetFrameAtIndex(idx, frame_sp);
}
}
}
} else if (original_idx == 0) {
// There should ALWAYS be a frame at index 0. If something went wrong with
// the CurrentInlinedDepth such that
// there weren't as many frames as we thought taking that into account, then
// reset the current inlined depth
// and return the real zeroth frame.
if (m_frames.empty()) {
// Why do we have a thread with zero frames, that should not ever
// happen...
if (m_thread.IsValid())
assert("A valid thread has no frames.");
} else {
ResetCurrentInlinedDepth();
frame_sp = m_frames[original_idx];
}
}
return frame_sp;
}
