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/*
*
* Connection Manager
*
* Copyright (C) 2007-2013 Intel Corporation. All rights reserved.
* Copyright (C) 2016 Yann E. MORIN <yann.morin.1998@free.fr>. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <execinfo.h>
#include <dlfcn.h>
#include "connman.h"
void print_backtrace(const char* program_path, const char* program_exec,
unsigned int offset)
{
void *frames[99];
size_t n_ptrs;
unsigned int i;
int outfd[2], infd[2];
int pathlen;
pid_t pid;
if (!program_exec)
return;
pathlen = strlen(program_path);
n_ptrs = backtrace(frames, G_N_ELEMENTS(frames));
if (n_ptrs < offset)
return;
if (pipe(outfd) < 0)
return;
if (pipe(infd) < 0) {
close(outfd[0]);
close(outfd[1]);
return;
}
pid = fork();
if (pid < 0) {
close(outfd[0]);
close(outfd[1]);
close(infd[0]);
close(infd[1]);
return;
}
if (pid == 0) {
close(outfd[1]);
close(infd[0]);
dup2(outfd[0], STDIN_FILENO);
dup2(infd[1], STDOUT_FILENO);
execlp("addr2line", "-C", "-f", "-e", program_exec, NULL);
exit(EXIT_FAILURE);
}
close(outfd[0]);
close(infd[1]);
connman_error("++++++++ backtrace ++++++++");
for (i = offset; i < n_ptrs - 1; i++) {
Dl_info info;
char addr[20], buf[PATH_MAX * 2];
int len, written;
char *ptr, *pos;
dladdr(frames[i], &info);
len = snprintf(addr, sizeof(addr), "%p\n", frames[i]);
if (len < 0)
break;
written = write(outfd[1], addr, len);
if (written < 0)
break;
len = read(infd[0], buf, sizeof(buf) - 1);
if (len < 0)
break;
buf[len] = '\0';
pos = strchr(buf, '\n');
*pos++ = '\0';
if (strcmp(buf, "??") == 0) {
connman_error("#%-2u %p in %s", i - offset,
frames[i], info.dli_fname);
continue;
}
ptr = strchr(pos, '\n');
*ptr++ = '\0';
if (strncmp(pos, program_path, pathlen) == 0)
pos += pathlen + 1;
connman_error("#%-2u %p in %s() at %s", i - offset,
frames[i], buf, pos);
}
connman_error("+++++++++++++++++++++++++++");
kill(pid, SIGTERM);
close(outfd[1]);
close(infd[0]);
}
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