Function thread_callback_for_frames

src/pystack/_pystack/unwinder.cpp:479–506

};

static int
thread_callback_for_frames(Dwfl_Thread* thread, void* arg)
{
    auto* thread_arg = static_cast<ThreadArg*>(arg);
    pid_t tid = dwfl_thread_tid(thread);
    if (tid != thread_arg->tid) {
        return DWARF_CB_OK;
    }

    switch (dwfl_thread_getframes(thread, frameCallback, (void*)(&(thread_arg->frames)))) {
        case DWARF_CB_OK:
        case DWARF_CB_ABORT:
            break;
        case -1:
            // This may or may not be an error, as it can signal the end of the stack
            // unwinding.
            if (thread_arg->frames.empty()) {
                int dwfl_err = dwfl_errno();
                std::string error(
                        dwfl_err ? dwfl_errmsg(dwfl_err) : "unwinding failed with no error reported");
                throw UnwinderError("Unknown error happened when gathering thread frames: " + error);
            }
            break;
        default:
            throw UnwinderError("Unknown error happened when gathering thread frames");
    }
    return DWARF_CB_OK;
}

std::vector<NativeFrame>
CoreFileUnwinder::unwindThread(pid_t tid) const