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-rw-r--r--src/backtrace.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/src/backtrace.c b/src/backtrace.c
new file mode 100644
index 00000000..6a66c0ac
--- /dev/null
+++ b/src/backtrace.c
@@ -0,0 +1,138 @@
+/*
+ *
+ * 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]);
+}