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/home/brennan/Software/sensix/source/stacktrace.c Go to the documentation of this file. /* * Copyright 2008. Los Alamos National Security, LLC. This material * was produced under U.S. Government contract DE-AC52-06NA25396 for * Los Alamos National Laboratory (LANL), which is operated by Los * Alamos National Security, LLC, for the Department of Energy. The * U.S. Government has rights to use, reproduce, and distribute this * software. NEITHER THE GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, * LLC, MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LEGAL * LIABILITY FOR THE USE OF THIS SOFTWARE. If software is modified to * produce derivative works, such modified software should be clearly * marked, so as not to confuse it with the version available from LANL. * * Additionally, this program is free software; you can redistribute * it and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; version 2 of * the License. Accordingly, this program is distributed in the hope * it will be useful, but WITHOUT ANY WARRANTY; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR * PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef __GNUC__ # error unknown compiler (not gcc/g++), no glibc backtracing #endif #ifdef __cplusplus extern "C" { # define DEMANGLE # include <cxxabi.h> #endif #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> #include <string.h> #include <errno.h> #include <execinfo.h> #include <sys/resource.h> #include "sense_impl.h" #include "stacktrace.h" #define TRACELEN 50 unsigned printStackTrace(const char *exception, const char *file, unsigned int line) { void *addrs[TRACELEN]; size_t i, depth = backtrace(addrs, TRACELEN); char **strings = backtrace_symbols(addrs, depth); if (strings == NULL) return 0; log_error("%s: %sException in %s, line %d:\n", APP, exception, file, line); for (i = 0; i < depth; i++) { #if 0 //DEMANGLE size_t max_name = 1024; char *begin = 0, *end = 0; char *name = static_cast<char*>(malloc(max_name)); if (name == NULL) return 0; for (char *j = strings[i]; *j; ++j) { // find parens around mangled name if (*j == '(') begin = j; else if (*j == '+') end = j; } if (begin && end) { // found *begin++ = '\0'; *end = '\0'; int ignore; char *ret = abi::__cxa_demangle(begin, name, &max_name, &ignore); if (ret) // in case of realloc name = ret; else { // demangling failed strncpy(name, begin, max_name); strncat(name, "()", max_name); name[max_name - 1] = '\0'; } log_error("%s: %s(%s)\n", APP, strings[i], name); } else // not found log_error("%s: %s\n", APP, strings[i]); free(name); #else // ! DEMANGLE log_error("%s: %s\n", APP, strings[i]); #endif } free(strings); return 1; } static void segv_handler(int sig, siginfo_t* info, void* ptr) { // printStackTrace is invalid here void *addrs[TRACELEN]; size_t depth = backtrace(addrs, TRACELEN); fprintf(stderr, "*** SEGFAULT (sig %d) - ", sig); fprintf(stderr, "%d stack frames ***\n", depth); backtrace_symbols_fd(addrs, depth, STDERR_FILENO); exit(-1); } int enable_backtrace() { struct sigaction action; struct rlimit limit; memset(&action, 0, sizeof(action)); action.sa_sigaction = segv_handler; action.sa_flags = SA_SIGINFO; if(sigaction(SIGSEGV, &action, NULL) < 0) { log_error("Failed to install SEGV backtrace facility (sigaction %s).\n", strerror(errno)); return -1; } memset(&limit, 0, sizeof(limit)); limit.rlim_cur = RLIM_INFINITY; limit.rlim_max = RLIM_INFINITY; setrlimit(RLIMIT_CORE, &limit); return 0; } static void __attribute((constructor)) init(void) { enable_backtrace(); } # ifdef __cplusplus } # endif

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