95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
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/* print.c -- Print the current backtrace.
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Copyright (C) 2012 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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const char *name;
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name = pdata->state->filename;
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if (name == NULL)
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name = "/proc/self/exe";
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fprintf (stderr, "%s: libbacktrace: %s", name, 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
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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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