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]);
+}