Function OnStackUnwind

system/lib/compiler-rt/lib/asan/asan_errors.cpp:25–42

namespace __asan {

static void OnStackUnwind(const SignalContext &sig,
                          const void *callback_context,
                          BufferedStackTrace *stack) {
  bool fast = common_flags()->fast_unwind_on_fatal;
#if SANITIZER_FREEBSD || SANITIZER_NETBSD
  // On FreeBSD the slow unwinding that leverages _Unwind_Backtrace()
  // yields the call stack of the signal's handler and not of the code
  // that raised the signal (as it does on Linux).
  fast = true;
#endif
  // Tests and maybe some users expect that scariness is going to be printed
  // just before the stack. As only asan has scariness score we have no
  // corresponding code in the sanitizer_common and we use this callback to
  // print it.
  static_cast<const ScarinessScoreBase *>(callback_context)->Print();
  stack->Unwind(StackTrace::GetNextInstructionPc(sig.pc), sig.bp, sig.context,
                fast);
}

void ErrorDeadlySignal::Print() {
  ReportDeadlySignal(signal, tid, &OnStackUnwind, &scariness);