blob: 2a6d8311e24c799567f32f58311a7cc7e8bcd7b9 [file] [log] [blame]
Daniel Kiss163101b2020-09-16 23:03:19 +02001// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10// Ensure that leaf function can be unwund.
Louis Dionneed4a85e2021-06-18 13:33:14 -040011// REQUIRES: linux && (target={{aarch64-.+}} || target={{x86_64-.+}})
Daniel Kiss163101b2020-09-16 23:03:19 +020012
13#include <assert.h>
14#include <dlfcn.h>
15#include <signal.h>
16#include <stdio.h>
17#include <stdlib.h>
18#include <string.h>
19#include <sys/types.h>
20#include <unistd.h>
21#include <unwind.h>
22
23_Unwind_Reason_Code frame_handler(struct _Unwind_Context* ctx, void* arg) {
24 (void)arg;
25 Dl_info info = { 0, 0, 0, 0 };
Daniel Kiss163101b2020-09-16 23:03:19 +020026
27 // Unwind util the main is reached, above frames deeped on the platfrom and architecture.
Ryan Pricharda684bed2021-01-13 16:38:36 -080028 if (dladdr(reinterpret_cast<void *>(_Unwind_GetIP(ctx)), &info) &&
29 info.dli_sname && !strcmp("main", info.dli_sname)) {
Daniel Kiss163101b2020-09-16 23:03:19 +020030 _Exit(0);
31 }
32 return _URC_NO_REASON;
33}
34
35void signal_handler(int signum) {
36 (void)signum;
37 _Unwind_Backtrace(frame_handler, NULL);
38 _Exit(-1);
39}
40
Daniel Kiss163101b2020-09-16 23:03:19 +020041__attribute__((noinline)) void crashing_leaf_func(void) {
Louis Dionnef51a1542021-11-22 14:51:09 -050042 raise(SIGSEGV);
Daniel Kiss163101b2020-09-16 23:03:19 +020043}
44
Louis Dionnecbfe0172020-10-08 13:36:33 -040045int main(int, char**) {
Daniel Kiss163101b2020-09-16 23:03:19 +020046 signal(SIGSEGV, signal_handler);
47 crashing_leaf_func();
48 return -2;
Louis Dionnef51a1542021-11-22 14:51:09 -050049}