Mikio Hara
94 lines
3.1 KiB
C
94 lines
3.1 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 "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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/* 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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#define STACK_DEPTH_LIMIT 128
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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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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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