add print backtrace

@@ -4,6 +4,7 @@ nobase_include_HEADERS = trbase.h \
 			 tr/interface.h \
 			 tr/memory.h \
 			 tr/logger.h \
+			 tr/print_trace.h \
 			 tr/sized_data.h \
 			 tr/tree_macros.h \
 			 tr/interface/class.h \

+/**
+ * \file
+ *
+ * \author	The GNU Software Foundation.
+ *
+ * \copyright
+ * Copyright © 2014 The GNU Softare Foundation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+void print_trace (void);

@@ -5,6 +5,7 @@
 #include "tr/memory.h"
 #include "tr/class.h"
 #include "tr/logger.h"
+#include "tr/print_trace.h"
 #include "tr/sized_data.h"
 #include "tr/interface.h"
 #include "tr/interface/class.h"

@@ -6,6 +6,7 @@ AM_CFLAGS += -I../include/
 TR_CLASS = memory.c \
 	   interface.c \
 	   logger.c \
+	   print_trace.c \
 	   stderr.c \
 	   syslog.c \
 	   sized_data.c \

+/**
+ * \file
+ *
+ * \author	The GNU Software Foundation.
+ *
+ * \copyright
+ * Copyright © 2014 The GNU Softare Foundation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <execinfo.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/* Obtain a backtrace and print it to stdout. */
+void
+print_trace (void)
+{
+	void   *  array[10];
+	size_t    size;
+	char   ** strings;
+	size_t    i;
+
+	size = backtrace (array, 10);
+	strings = backtrace_symbols (array, size);
+
+	printf ("Obtained %zd stack frames.\n", size);
+
+	for (i = 0; i < size; i++)
+		printf ("%s\n", strings[i]);
+
+	free (strings);
+}
+
+// vim: set ts=4 sw=4: