| /* print.c -- Print the current backtrace. |
| Copyright (C) 2012-2018 Free Software Foundation, Inc. |
| Written by Ian Lance Taylor, Google. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are |
| met: |
| |
| (1) Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| |
| (2) Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in |
| the documentation and/or other materials provided with the |
| distribution. |
| |
| (3) The name of the author may not be used to |
| endorse or promote products derived from this software without |
| specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. */ |
| |
| #include "config.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/types.h> |
| |
| #include "backtrace.h" |
| #include "internal.h" |
| |
| /* Passed to callbacks. */ |
| |
| struct print_data |
| { |
| struct backtrace_state *state; |
| FILE *f; |
| }; |
| |
| /* Print one level of a backtrace. */ |
| |
| static int |
| print_callback (void *data, uintptr_t pc, const char *filename, int lineno, |
| const char *function) |
| { |
| struct print_data *pdata = (struct print_data *) data; |
| |
| fprintf (pdata->f, "0x%lx %s\n\t%s:%d\n", |
| (unsigned long) pc, |
| function == NULL ? "???" : function, |
| filename == NULL ? "???" : filename, |
| lineno); |
| return 0; |
| } |
| |
| /* Print errors to stderr. */ |
| |
| static void |
| error_callback (void *data, const char *msg, int errnum) |
| { |
| struct print_data *pdata = (struct print_data *) data; |
| |
| if (pdata->state->filename != NULL) |
| fprintf (stderr, "%s: ", pdata->state->filename); |
| fprintf (stderr, "libbacktrace: %s", msg); |
| if (errnum > 0) |
| fprintf (stderr, ": %s", strerror (errnum)); |
| fputc ('\n', stderr); |
| } |
| |
| /* Print a backtrace. */ |
| |
| void |
| backtrace_print (struct backtrace_state *state, int skip, FILE *f) |
| { |
| struct print_data data; |
| |
| data.state = state; |
| data.f = f; |
| backtrace_full (state, skip + 1, print_callback, error_callback, |
| (void *) &data); |
| } |