Bob Lantz
9f587fc8e6
Our own functions don't seem to work with the latest gcc, so it seems to make sense to use the glibc versions which should be equivalent and maintained.
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/* Copyright (c) 2008, 2009 The Board of Trustees of The Leland Stanford
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* Junior University
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*
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* We are making the OpenFlow specification and associated documentation
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* (Software) available for public use and benefit with the expectation
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* that others will use, modify and enhance the Software and contribute
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* those enhancements back to the community. However, since we would
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* like to make the Software available for broadest use, with as few
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* restrictions as possible permission is hereby granted, free of
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* charge, to any person obtaining a copy of this Software to deal in
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* the Software under the copyrights without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* The name and trademarks of copyright holder(s) may NOT be used in
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* advertising or publicity pertaining to the Software or any
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* derivatives without specific, written prior permission.
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*/
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#include <config.h>
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#include "fault.h"
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#include <dlfcn.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include "util.h"
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#include <execinfo.h>
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#include "vlog.h"
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#define THIS_MODULE VLM_fault
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static void
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fault_handler(int sig_nr)
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{
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VLOG_EMER("Caught signal %d.", sig_nr);
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log_backtrace();
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fflush(stdout);
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fflush(stderr);
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signal(sig_nr, SIG_DFL);
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raise(sig_nr);
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}
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void
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log_backtrace(void)
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{
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#define STACK_DEPTH_LIMIT 128
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#ifdef OLD_LOG_BACKTRACE
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/* During the loop:
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frame[0] points to the next frame.
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frame[1] points to the return address. */
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void **frame;
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int stack_depth = 0;
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for (frame = __builtin_frame_address(0);
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frame != NULL && frame[0] != NULL
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&& stack_depth < STACK_DEPTH_LIMIT;
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frame = frame[0], ++stack_depth) {
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Dl_info addrinfo;
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if (!dladdr(frame[1], &addrinfo) || !addrinfo.dli_sname) {
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fprintf(stderr, " 0x%08"PRIxPTR"\n", (uintptr_t) frame[1]);
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} else {
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fprintf(stderr, " 0x%08"PRIxPTR" (%s+0x%x)\n",
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(uintptr_t) frame[1], addrinfo.dli_sname,
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(char *) frame[1] - (char *) addrinfo.dli_saddr);
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}
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}
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#else
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/* Use glibc functions to print backtrace */
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void *buffer[STACK_DEPTH_LIMIT];
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backtrace(buffer, STACK_DEPTH_LIMIT);
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backtrace_symbols_fd(buffer, STACK_DEPTH_LIMIT, fileno(stderr));
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#endif
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fflush(stderr);
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}
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void
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register_fault_handlers(void)
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{
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signal(SIGABRT, fault_handler);
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signal(SIGBUS, fault_handler);
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signal(SIGFPE, fault_handler);
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signal(SIGILL, fault_handler);
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signal(SIGSEGV, fault_handler);
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}
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