[PATCH] testsuite: get stacktrace if test drops core

[Mike Snitzer <snitzer@redhat.com>]

Requires lvm be built with debugging (-g).
Also requires ulimit -c be non-zero (to drop core file).

diff --git a/test/test-utils.sh b/test/test-utils.sh
index 6606c56..06b9636 100644
--- a/test/test-utils.sh
+++ b/test/test-utils.sh
@@ -24,6 +24,21 @@ STACKTRACE() {
 		echo "$i ${FUNC}() called from ${BASH_SOURCE[$i]}:${BASH_LINENO[$i]}"
 		i=$(($i + 1));
 	done
+
+	# Attempt to get a stacktrace if a core file exists
+	# and the lvm binary was built with debugging
+	TEST_LVM_BINARY=$(dirname $(which lvm))/../../tools/lvm
+	TEST_LVM_CORE=`ls core* | head -1`
+	GDB_BINARY=`which gdb`
+	READELF_BINARY=`which readelf`
+	if [ -n "$TEST_LVM_CORE" -a -n "$GDB_BINARY" -a -n "$READELF_BINARY" ]; then
+		if $READELF_BINARY -S $TEST_LVM_BINARY 2>&1 | grep -q .debug_info; then
+			echo bt > gdb_commands.txt
+			echo l >> gdb_commands.txt
+			echo quit >> gdb_commands.txt
+			$GDB_BINARY -batch -c $TEST_LVM_CORE -x gdb_commands.txt $TEST_LVM_BINARY
+		fi
+	fi
 }
 
 init_udev_transaction() {