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92 lines
2.7 KiB
92 lines
2.7 KiB
/* print.c -- Print the current backtrace. |
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Copyright (C) 2012-2021 Free Software Foundation, Inc. |
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Written by Ian Lance Taylor, Google. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are |
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met: |
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(1) Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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(2) Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in |
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the documentation and/or other materials provided with the |
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distribution. |
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(3) The name of the author may not be used to |
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endorse or promote products derived from this software without |
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specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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POSSIBILITY OF SUCH DAMAGE. */ |
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#include "config.h" |
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#include <stdio.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include "backtrace.h" |
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#include "internal.h" |
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/* Passed to callbacks. */ |
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struct print_data |
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{ |
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struct backtrace_state *state; |
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FILE *f; |
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}; |
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/* Print one level of a backtrace. */ |
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static int |
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print_callback (void *data, uintptr_t pc, const char *filename, int lineno, |
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const char *function) |
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{ |
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struct print_data *pdata = (struct print_data *) data; |
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fprintf (pdata->f, "0x%lx %s\n\t%s:%d\n", |
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(unsigned long) pc, |
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function == NULL ? "???" : function, |
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filename == NULL ? "???" : filename, |
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lineno); |
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return 0; |
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} |
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/* Print errors to stderr. */ |
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static void |
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error_callback (void *data, const char *msg, int errnum) |
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{ |
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struct print_data *pdata = (struct print_data *) data; |
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if (pdata->state->filename != NULL) |
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fprintf (stderr, "%s: ", pdata->state->filename); |
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fprintf (stderr, "libbacktrace: %s", msg); |
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if (errnum > 0) |
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fprintf (stderr, ": %s", strerror (errnum)); |
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fputc ('\n', stderr); |
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} |
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/* Print a backtrace. */ |
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void __attribute__((noinline)) |
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backtrace_print (struct backtrace_state *state, int skip, FILE *f) |
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{ |
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struct print_data data; |
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data.state = state; |
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data.f = f; |
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backtrace_full (state, skip + 1, print_callback, error_callback, |
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(void *) &data); |
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}
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