1*38fd1498Szrj /* print.c -- Print the current backtrace.
2*38fd1498Szrj Copyright (C) 2012-2018 Free Software Foundation, Inc.
3*38fd1498Szrj Written by Ian Lance Taylor, Google.
4*38fd1498Szrj
5*38fd1498Szrj Redistribution and use in source and binary forms, with or without
6*38fd1498Szrj modification, are permitted provided that the following conditions are
7*38fd1498Szrj met:
8*38fd1498Szrj
9*38fd1498Szrj (1) Redistributions of source code must retain the above copyright
10*38fd1498Szrj notice, this list of conditions and the following disclaimer.
11*38fd1498Szrj
12*38fd1498Szrj (2) Redistributions in binary form must reproduce the above copyright
13*38fd1498Szrj notice, this list of conditions and the following disclaimer in
14*38fd1498Szrj the documentation and/or other materials provided with the
15*38fd1498Szrj distribution.
16*38fd1498Szrj
17*38fd1498Szrj (3) The name of the author may not be used to
18*38fd1498Szrj endorse or promote products derived from this software without
19*38fd1498Szrj specific prior written permission.
20*38fd1498Szrj
21*38fd1498Szrj THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22*38fd1498Szrj IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23*38fd1498Szrj WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24*38fd1498Szrj DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
25*38fd1498Szrj INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26*38fd1498Szrj (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27*38fd1498Szrj SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28*38fd1498Szrj HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
29*38fd1498Szrj STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
30*38fd1498Szrj IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31*38fd1498Szrj POSSIBILITY OF SUCH DAMAGE. */
32*38fd1498Szrj
33*38fd1498Szrj #include "config.h"
34*38fd1498Szrj
35*38fd1498Szrj #include <stdio.h>
36*38fd1498Szrj #include <string.h>
37*38fd1498Szrj #include <sys/types.h>
38*38fd1498Szrj
39*38fd1498Szrj #include "backtrace.h"
40*38fd1498Szrj #include "internal.h"
41*38fd1498Szrj
42*38fd1498Szrj /* Passed to callbacks. */
43*38fd1498Szrj
44*38fd1498Szrj struct print_data
45*38fd1498Szrj {
46*38fd1498Szrj struct backtrace_state *state;
47*38fd1498Szrj FILE *f;
48*38fd1498Szrj };
49*38fd1498Szrj
50*38fd1498Szrj /* Print one level of a backtrace. */
51*38fd1498Szrj
52*38fd1498Szrj static int
print_callback(void * data,uintptr_t pc,const char * filename,int lineno,const char * function)53*38fd1498Szrj print_callback (void *data, uintptr_t pc, const char *filename, int lineno,
54*38fd1498Szrj const char *function)
55*38fd1498Szrj {
56*38fd1498Szrj struct print_data *pdata = (struct print_data *) data;
57*38fd1498Szrj
58*38fd1498Szrj fprintf (pdata->f, "0x%lx %s\n\t%s:%d\n",
59*38fd1498Szrj (unsigned long) pc,
60*38fd1498Szrj function == NULL ? "???" : function,
61*38fd1498Szrj filename == NULL ? "???" : filename,
62*38fd1498Szrj lineno);
63*38fd1498Szrj return 0;
64*38fd1498Szrj }
65*38fd1498Szrj
66*38fd1498Szrj /* Print errors to stderr. */
67*38fd1498Szrj
68*38fd1498Szrj static void
error_callback(void * data,const char * msg,int errnum)69*38fd1498Szrj error_callback (void *data, const char *msg, int errnum)
70*38fd1498Szrj {
71*38fd1498Szrj struct print_data *pdata = (struct print_data *) data;
72*38fd1498Szrj
73*38fd1498Szrj if (pdata->state->filename != NULL)
74*38fd1498Szrj fprintf (stderr, "%s: ", pdata->state->filename);
75*38fd1498Szrj fprintf (stderr, "libbacktrace: %s", msg);
76*38fd1498Szrj if (errnum > 0)
77*38fd1498Szrj fprintf (stderr, ": %s", strerror (errnum));
78*38fd1498Szrj fputc ('\n', stderr);
79*38fd1498Szrj }
80*38fd1498Szrj
81*38fd1498Szrj /* Print a backtrace. */
82*38fd1498Szrj
83*38fd1498Szrj void
backtrace_print(struct backtrace_state * state,int skip,FILE * f)84*38fd1498Szrj backtrace_print (struct backtrace_state *state, int skip, FILE *f)
85*38fd1498Szrj {
86*38fd1498Szrj struct print_data data;
87*38fd1498Szrj
88*38fd1498Szrj data.state = state;
89*38fd1498Szrj data.f = f;
90*38fd1498Szrj backtrace_full (state, skip + 1, print_callback, error_callback,
91*38fd1498Szrj (void *) &data);
92*38fd1498Szrj }
93