r19164: merge the gdb_backtrace script from samba4

this more portable and try to make use of ladebug on Tru64,
but that only works when the binary is passed as 2nd arg to gdb_backtrace
as Tru64 doesn't know /proc/${PID}/exe

we need to find a way to pass the progname in 'panic action'
in samba3

metze
(This used to be commit 2f55fd82ff5db82974f91648cc386daa423e38be)

1 files changed, 71 insertions, 25 deletions

diff --git a/source3/script/tests/gdb_backtrace b/source3/script/tests/gdb_backtrace
index 8a74d1c101..b19a5b2f4b 100755
--- a/source3/script/tests/gdb_backtrace
+++ b/source3/script/tests/gdb_backtrace
@@ -1,41 +1,87 @@
-#! /bin/sh
-#
-# Author: Andrew Tridgell <tridge at samba dot org>
+#!/bin/sh
+
+BASENAME=`basename $0`
+
+if [ -n "$VALGRIND" -o -n "$SMBD_VALGRIND" ]; then
+	echo "${BASENAME}: Not running debugger under valgrind"
+	exit 1
+fi
 
 # we want everything on stderr, so the program is not disturbed
 exec 1>&2
 
 BASENAME=`basename $0`
+UNAME=`uname`
 
 PID=$1
-if [ x"$PID" = x"" ]; then
-	echo "ERROR: ${BASENAME} needs a PID. "
+BINARY=$2
+
+test x"${PID}" = x"" && {
+	echo "Usage: ${BASENAME} <pid> [<binary>]"
 	exit 1
-fi
+}
+
+DB_LIST="gdb"
+case "${UNAME}" in
+	#
+	# on Tru64 we need to try ladebug first
+	# because gdb crashes itself...
+	#
+	OSF1)
+		DB_LIST="ladebug ${DB_LIST}"
+	;;
+esac
 
-test x"${GDB_BIN}" = x"" && GDB_BIN=`type -p gdb`
-if [ x"${GDB_BIN}" = x"" ]; then
-	echo "ERROR: ${BASENAME} needs an installed gdb. "
+for DB in ${DB_LIST}; do
+	DB_BIN=`which ${DB} 2>/dev/null`
+	test x"${DB_BIN}" != x"" && {
+		break
+	}
+done
+
+test x"${DB_BIN}" = x"" && {
+	echo "${BASENAME}: ERROR: No debugger found."
 	exit 1
-fi
+}
 
-# use /dev/shm as default temp directory
-test -d /dev/shm && \
-	TMP_BASE_DIR=/dev/shm || \
-	TMP_BASE_DIR=/var/tmp
-TMPFILE=`mktemp -p ${TMP_BASE_DIR} backtrace.XXXXXX`
-if [ $? -ne 0 ]; then
-	echo "ERROR: ${basename} can't create temp file in ${TMP_BASE_DIR}. "
+#
+# we first try to use /proc/${PID}/exe
+# then fallback to the binary from the commandline
+# then we search for the commandline argument with
+# 'which'
+#
+test -f "/proc/${PID}/exe" && BINARY="/proc/${PID}/exe"
+test x"${BINARY}" = x"" && BINARY="/proc/${PID}/exe"
+test -f "${BINARY}" || BINARY=`which ${BINARY}`
+
+test -f "${BINARY}" || {
+	echo "${BASENAME}: ERROR: Cannot find binary '${BINARY}'."
 	exit 1
-fi
+}
+
+echo "${BASENAME}: Trying to use ${DB_BIN} on ${BINARY} on PID ${PID}"
 
-cat << EOF  > "${TMPFILE}"
-set height 0
-up 8
+BATCHFILE_PRE=/tmp/gdb_backtrace_pre.$$
+BATCHFILE_MAIN=/tmp/gdb_backtrace_main.$$
+case "${DB}" in
+	ladebug)
+cat << EOF  > ${BATCHFILE_PRE}
+set \$stoponattach
+EOF
+
+cat << EOF  > ${BATCHFILE_MAIN}
+where
+quit
+EOF
+	${DB_BIN} -c "${BATCHFILE_MAIN}" -i "${BATCHFILE_PRE}" -pid "${PID}" "${BINARY}"
+	;;
+	gdb)
+cat << EOF  > ${BATCHFILE_MAIN}
+set height 1000
 bt full
 quit
 EOF
-
-${GDB_BIN} -x "${TMPFILE}" "/proc/${PID}/exe" "${PID}"
-
-/bin/rm -f "${TMPFILE}"
+	${DB_BIN} -x "${BATCHFILE_MAIN}" "${BINARY}" "${PID}"
+	;;
+esac
+/bin/rm -f ${BATCHFILE_PRE} ${BATCHFILE_MAIN}