/* Test unwinding through main. Copyright (C) 2018-2019 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <unwind.h> #include <unistd.h> #include <support/test-driver.h> #if USE_PTHREADS # include <pthread.h> # include <error.h> #endif static _Unwind_Reason_Code callback (struct _Unwind_Context *ctx, void *arg) { return _URC_NO_REASON; } static void * func (void *a) { /* Arrange for this test to be killed if _Unwind_Backtrace runs into an endless loop. We cannot use the test driver because the complete call chain needs to be compiled with -funwind-tables so that _Unwind_Backtrace is able to reach the start routine. */ alarm (DEFAULT_TIMEOUT); _Unwind_Backtrace (callback, 0); return a; } int main (void) { #if USE_PTHREADS pthread_t thr; int rc = pthread_create (&thr, NULL, &func, NULL); if (rc) error (1, rc, "pthread_create"); rc = pthread_join (thr, NULL); if (rc) error (1, rc, "pthread_join"); #else func (NULL); #endif }