/*
* Copyright (c) 2003 Maxim Sobolev <sobomax@FreeBSD.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $Id: execinfo.c,v 1.3 2004/07/19 05:21:09 sobomax Exp $
*/
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#ifndef HAVE_BACKTRACE
#include <sys/types.h>
#include <sys/uio.h>
#include <dlfcn.h>
#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stddef.h>
#include "execinfo_compat.h"
#define D10(x) ceil(log10(((x) == 0) ? 2 : ((x) + 1)))
static void *
getreturnaddr(int level)
{
switch (level) {
case 0: return __builtin_return_address(1);
case 1: return __builtin_return_address(2);
case 2: return __builtin_return_address(3);
case 3: return __builtin_return_address(4);
case 4: return __builtin_return_address(5);
case 5: return __builtin_return_address(6);
case 6: return __builtin_return_address(7);
case 7: return __builtin_return_address(8);
case 8: return __builtin_return_address(9);
case 9: return __builtin_return_address(10);
case 10: return __builtin_return_address(11);
case 11: return __builtin_return_address(12);
case 12: return __builtin_return_address(13);
case 13: return __builtin_return_address(14);
case 14: return __builtin_return_address(15);
case 15: return __builtin_return_address(16);
case 16: return __builtin_return_address(17);
case 17: return __builtin_return_address(18);
case 18: return __builtin_return_address(19);
case 19: return __builtin_return_address(20);
case 20: return __builtin_return_address(21);
case 21: return __builtin_return_address(22);
case 22: return __builtin_return_address(23);
case 23: return __builtin_return_address(24);
case 24: return __builtin_return_address(25);
case 25: return __builtin_return_address(26);
case 26: return __builtin_return_address(27);
case 27: return __builtin_return_address(28);
case 28: return __builtin_return_address(29);
case 29: return __builtin_return_address(30);
case 30: return __builtin_return_address(31);
case 31: return __builtin_return_address(32);
case 32: return __builtin_return_address(33);
case 33: return __builtin_return_address(34);
case 34: return __builtin_return_address(35);
case 35: return __builtin_return_address(36);
case 36: return __builtin_return_address(37);
case 37: return __builtin_return_address(38);
case 38: return __builtin_return_address(39);
case 39: return __builtin_return_address(40);
case 40: return __builtin_return_address(41);
case 41: return __builtin_return_address(42);
case 42: return __builtin_return_address(43);
case 43: return __builtin_return_address(44);
case 44: return __builtin_return_address(45);
case 45: return __builtin_return_address(46);
case 46: return __builtin_return_address(47);
case 47: return __builtin_return_address(48);
case 48: return __builtin_return_address(49);
case 49: return __builtin_return_address(50);
case 50: return __builtin_return_address(51);
case 51: return __builtin_return_address(52);
case 52: return __builtin_return_address(53);
case 53: return __builtin_return_address(54);
case 54: return __builtin_return_address(55);
case 55: return __builtin_return_address(56);
case 56: return __builtin_return_address(57);
case 57: return __builtin_return_address(58);
case 58: return __builtin_return_address(59);
case 59: return __builtin_return_address(60);
case 60: return __builtin_return_address(61);
case 61: return __builtin_return_address(62);
case 62: return __builtin_return_address(63);
case 63: return __builtin_return_address(64);
case 64: return __builtin_return_address(65);
case 65: return __builtin_return_address(66);
case 66: return __builtin_return_address(67);
case 67: return __builtin_return_address(68);
case 68: return __builtin_return_address(69);
case 69: return __builtin_return_address(70);
case 70: return __builtin_return_address(71);
case 71: return __builtin_return_address(72);
case 72: return __builtin_return_address(73);
case 73: return __builtin_return_address(74);
case 74: return __builtin_return_address(75);
case 75: return __builtin_return_address(76);
case 76: return __builtin_return_address(77);
case 77: return __builtin_return_address(78);
case 78: return __builtin_return_address(79);
case 79: return __builtin_return_address(80);
case 80: return __builtin_return_address(81);
case 81: return __builtin_return_address(82);
case 82: return __builtin_return_address(83);
case 83: return __builtin_return_address(84);
case 84: return __builtin_return_address(85);
case 85: return __builtin_return_address(86);
case 86: return __builtin_return_address(87);
case 87: return __builtin_return_address(88);
case 88: return __builtin_return_address(89);
case 89: return __builtin_return_address(90);
case 90: return __builtin_return_address(91);
case 91: return __builtin_return_address(92);
case 92: return __builtin_return_address(93);
case 93: return __builtin_return_address(94);
case 94: return __builtin_return_address(95);
case 95: return __builtin_return_address(96);
case 96: return __builtin_return_address(97);
case 97: return __builtin_return_address(98);
case 98: return __builtin_return_address(99);
case 99: return __builtin_return_address(100);
case 100: return __builtin_return_address(101);
case 101: return __builtin_return_address(102);
case 102: return __builtin_return_address(103);
case 103: return __builtin_return_address(104);
case 104: return __builtin_return_address(105);
case 105: return __builtin_return_address(106);
case 106: return __builtin_return_address(107);
case 107: return __builtin_return_address(108);
case 108: return __builtin_return_address(109);
case 109: return __builtin_return_address(110);
case 110: return __builtin_return_address(111);
case 111: return __builtin_return_address(112);
case 112: return __builtin_return_address(113);
case 113: return __builtin_return_address(114);
case 114: return __builtin_return_address(115);
case 115: return __builtin_return_address(116);
case 116: return __builtin_return_address(117);
case 117: return __builtin_return_address(118);
case 118: return __builtin_return_address(119);
case 119: return __builtin_return_address(120);
case 120: return __builtin_return_address(121);
case 121: return __builtin_return_address(122);
case 122: return __builtin_return_address(123);
case 123: return __builtin_return_address(124);
case 124: return __builtin_return_address(125);
case 125: return __builtin_return_address(126);
case 126: return __builtin_return_address(127);
case 127: return __builtin_return_address(128);
default: return NULL;
}
}
static void *
getframeaddr(int level)
{
switch (level) {
case 0: return __builtin_frame_address(1);
case 1: return __builtin_frame_address(2);
case 2: return __builtin_frame_address(3);
case 3: return __builtin_frame_address(4);
case 4: return __builtin_frame_address(5);
case 5: return __builtin_frame_address(6);
case 6: return __builtin_frame_address(7);
case 7: return __builtin_frame_address(8);
case 8: return __builtin_frame_address(9);
case 9: return __builtin_frame_address(10);
case 10: return __builtin_frame_address(11);
case 11: return __builtin_frame_address(12);
case 12: return __builtin_frame_address(13);
case 13: return __builtin_frame_address(14);
case 14: return __builtin_frame_address(15);
case 15: return __builtin_frame_address(16);
case 16: return __builtin_frame_address(17);
case 17: return __builtin_frame_address(18);
case 18: return __builtin_frame_address(19);
case 19: return __builtin_frame_address(20);
case 20: return __builtin_frame_address(21);
case 21: return __builtin_frame_address(22);
case 22: return __builtin_frame_address(23);
case 23: return __builtin_frame_address(24);
case 24: return __builtin_frame_address(25);
case 25: return __builtin_frame_address(26);
case 26: return __builtin_frame_address(27);
case 27: return __builtin_frame_address(28);
case 28: return __builtin_frame_address(29);
case 29: return __builtin_frame_address(30);
case 30: return __builtin_frame_address(31);
case 31: return __builtin_frame_address(32);
case 32: return __builtin_frame_address(33);
case 33: return __builtin_frame_address(34);
case 34: return __builtin_frame_address(35);
case 35: return __builtin_frame_address(36);
case 36: return __builtin_frame_address(37);
case 37: return __builtin_frame_address(38);
case 38: return __builtin_frame_address(39);
case 39: return __builtin_frame_address(40);
case 40: return __builtin_frame_address(41);
case 41: return __builtin_frame_address(42);
case 42: return __builtin_frame_address(43);
case 43: return __builtin_frame_address(44);
case 44: return __builtin_frame_address(45);
case 45: return __builtin_frame_address(46);
case 46: return __builtin_frame_address(47);
case 47: return __builtin_frame_address(48);
case 48: return __builtin_frame_address(49);
case 49: return __builtin_frame_address(50);
case 50: return __builtin_frame_address(51);
case 51: return __builtin_frame_address(52);
case 52: return __builtin_frame_address(53);
case 53: return __builtin_frame_address(54);
case 54: return __builtin_frame_address(55);
case 55: return __builtin_frame_address(56);
case 56: return __builtin_frame_address(57);
case 57: return __builtin_frame_address(58);
case 58: return __builtin_frame_address(59);
case 59: return __builtin_frame_address(60);
case 60: return __builtin_frame_address(61);
case 61: return __builtin_frame_address(62);
case 62: return __builtin_frame_address(63);
case 63: return __builtin_frame_address(64);
case 64: return __builtin_frame_address(65);
case 65: return __builtin_frame_address(66);
case 66: return __builtin_frame_address(67);
case 67: return __builtin_frame_address(68);
case 68: return __builtin_frame_address(69);
case 69: return __builtin_frame_address(70);
case 70: return __builtin_frame_address(71);
case 71: return __builtin_frame_address(72);
case 72: return __builtin_frame_address(73);
case 73: return __builtin_frame_address(74);
case 74: return __builtin_frame_address(75);
case 75: return __builtin_frame_address(76);
case 76: return __builtin_frame_address(77);
case 77: return __builtin_frame_address(78);
case 78: return __builtin_frame_address(79);
case 79: return __builtin_frame_address(80);
case 80: return __builtin_frame_address(81);
case 81: return __builtin_frame_address(82);
case 82: return __builtin_frame_address(83);
case 83: return __builtin_frame_address(84);
case 84: return __builtin_frame_address(85);
case 85: return __builtin_frame_address(86);
case 86: return __builtin_frame_address(87);
case 87: return __builtin_frame_address(88);
case 88: return __builtin_frame_address(89);
case 89: return __builtin_frame_address(90);
case 90: return __builtin_frame_address(91);
case 91: return __builtin_frame_address(92);
case 92: return __builtin_frame_address(93);
case 93: return __builtin_frame_address(94);
case 94: return __builtin_frame_address(95);
case 95: return __builtin_frame_address(96);
case 96: return __builtin_frame_address(97);
case 97: return __builtin_frame_address(98);
case 98: return __builtin_frame_address(99);
case 99: return __builtin_frame_address(100);
case 100: return __builtin_frame_address(101);
case 101: return __builtin_frame_address(102);
case 102: return __builtin_frame_address(103);
case 103: return __builtin_frame_address(104);
case 104: return __builtin_frame_address(105);
case 105: return __builtin_frame_address(106);
case 106: return __builtin_frame_address(107);
case 107: return __builtin_frame_address(108);
case 108: return __builtin_frame_address(109);
case 109: return __builtin_frame_address(110);
case 110: return __builtin_frame_address(111);
case 111: return __builtin_frame_address(112);
case 112: return __builtin_frame_address(113);
case 113: return __builtin_frame_address(114);
case 114: return __builtin_frame_address(115);
case 115: return __builtin_frame_address(116);
case 116: return __builtin_frame_address(117);
case 117: return __builtin_frame_address(118);
case 118: return __builtin_frame_address(119);
case 119: return __builtin_frame_address(120);
case 120: return __builtin_frame_address(121);
case 121: return __builtin_frame_address(122);
case 122: return __builtin_frame_address(123);
case 123: return __builtin_frame_address(124);
case 124: return __builtin_frame_address(125);
case 125: return __builtin_frame_address(126);
case 126: return __builtin_frame_address(127);
case 127: return __builtin_frame_address(128);
default: return NULL;
}
}
static inline void *
realloc_safe(void *ptr, size_t size)
{
void *nptr;
nptr = realloc (ptr, size);
if (nptr == NULL)
free (ptr);
return nptr;
}
int
backtrace(void **buffer, int size)
{
int i;
for (i = 1; getframeaddr(i + 1) != NULL && i != size + 1; i++) {
buffer[i - 1] = getreturnaddr(i);
if (buffer[i - 1] == NULL)
break;
}
return i - 1;
}
char **
backtrace_symbols(void *const *buffer, int size)
{
size_t clen, alen;
int i, offset;
char **rval;
Dl_info info;
clen = size * sizeof(char *);
rval = malloc(clen);
if (rval == NULL)
return NULL;
for (i = 0; i < size; i++) {
if (dladdr(buffer[i], &info) != 0) {
if (info.dli_sname == NULL)
info.dli_sname = "???";
if (info.dli_saddr == NULL)
info.dli_saddr = buffer[i];
offset = buffer[i] - info.dli_saddr;
/* "0x01234567 <function+offset> at filename" */
alen = 2 + /* "0x" */
(sizeof(void *) * 2) + /* "01234567" */
2 + /* " <" */
strlen(info.dli_sname) + /* "function" */
1 + /* "+" */
10 + /* "offset */
5 + /* "> at " */
strlen(info.dli_fname) + /* "filename" */
1; /* "\0" */
rval = realloc_safe(rval, clen + alen);
if (rval == NULL)
return NULL;
snprintf((char *) rval + clen, alen, "%p <%s+%d> at %s",
buffer[i], info.dli_sname, offset, info.dli_fname);
} else {
alen = 2 + /* "0x" */
(sizeof(void *) * 2) + /* "01234567" */
1; /* "\0" */
rval = realloc_safe(rval, clen + alen);
if (rval == NULL)
return NULL;
snprintf((char *) rval + clen, alen, "%p", buffer[i]);
}
rval[i] = (char *) clen;
clen += alen;
}
for (i = 0; i < size; i++)
rval[i] += (long) rval;
return rval;
}
void
backtrace_symbols_fd(void *const *buffer, int size, int fd)
{
int i, len, offset;
char *buf;
Dl_info info;
for (i = 0; i < size; i++) {
if (dladdr(buffer[i], &info) != 0) {
if (info.dli_sname == NULL)
info.dli_sname = "???";
if (info.dli_saddr == NULL)
info.dli_saddr = buffer[i];
offset = buffer[i] - info.dli_saddr;
/* "0x01234567 <function+offset> at filename" */
len = 2 + /* "0x" */
(sizeof(void *) * 2) + /* "01234567" */
2 + /* " <" */
strlen(info.dli_sname) + /* "function" */
1 + /* "+" */
D10(offset) + /* "offset */
5 + /* "> at " */
strlen(info.dli_fname) + /* "filename" */
2; /* "\n\0" */
buf = alloca(len);
if (buf == NULL)
return;
snprintf(buf, len, "%p <%s+%d> at %s\n",
buffer[i], info.dli_sname, offset, info.dli_fname);
} else {
len = 2 + /* "0x" */
(sizeof(void *) * 2) + /* "01234567" */
2; /* "\n\0" */
buf = alloca(len);
if (buf == NULL)
return;
snprintf(buf, len, "%p\n", buffer[i]);
}
if (write(fd, buf, strlen(buf)) == -1)
return;
}
}
#endif