selftest/gdb_backtrace

   1 #!/bin/sh
   2
   3 BASENAME=`basename $0`
   4
   5 if [ -n "$VALGRIND" -o -n "$SMBD_VALGRIND" ]; then
   6         echo "${BASENAME}: Not running debugger under valgrind"
   7         exit 1
   8 fi
   9
  10 # we want everything on stderr, so the program is not disturbed
  11 exec 1>&2
  12
  13 BASENAME=`basename $0`
  14 UNAME=`uname`
  15
  16 PID=$1
  17 BINARY=$2
  18
  19 test x"${PID}" = x"" && {
  20         echo "Usage: ${BASENAME} <pid> [<binary>]"
  21         exit 1
  22 }
  23
  24 DB_LIST="gdb"
  25 case "${UNAME}" in
  26         #
  27         # on Tru64 we need to try ladebug first
  28         # because gdb crashes itself...
  29         #
  30         OSF1)
  31                 DB_LIST="ladebug ${DB_LIST}"
  32         ;;
  33 esac
  34
  35 for DB in ${DB_LIST}; do
  36         DB_BIN=`which ${DB} 2>/dev/null | grep '^/'`
  37         test x"${DB_BIN}" != x"" && {
  38                 break
  39         }
  40 done
  41
  42 test x"${DB_BIN}" = x"" && {
  43         echo "${BASENAME}: ERROR: No debugger found."
  44         exit 1
  45 }
  46
  47 #
  48 # we first try to use /proc/${PID}/exe
  49 # then fallback to the binary from the commandline
  50 # then we search for the commandline argument with
  51 # 'which'
  52 #
  53 test -f "/proc/${PID}/exe" && BINARY="/proc/${PID}/exe"
  54 test x"${BINARY}" = x"" && BINARY="/proc/${PID}/exe"
  55 test -f "${BINARY}" || BINARY=`which ${BINARY}`
  56
  57 test -f "${BINARY}" || {
  58         echo "${BASENAME}: ERROR: Cannot find binary '${BINARY}'."
  59         exit 1
  60 }
  61
  62 echo "${BASENAME}: Trying to use ${DB_BIN} on ${BINARY} on PID ${PID}"
  63
  64 BATCHFILE_PRE=/tmp/gdb_backtrace_pre.$$
  65 BATCHFILE_MAIN=/tmp/gdb_backtrace_main.$$
  66 case "${DB}" in
  67         ladebug)
  68 cat << EOF  > ${BATCHFILE_PRE}
  69 set \$stoponattach
  70 EOF
  71
  72 cat << EOF  > ${BATCHFILE_MAIN}
  73 where
  74 quit
  75 EOF
  76         ${DB_BIN} -c "${BATCHFILE_MAIN}" -i "${BATCHFILE_PRE}" -pid "${PID}" "${BINARY}"
  77         ;;
  78         gdb)
  79 cat << EOF  > ${BATCHFILE_MAIN}
  80 set height 1000
  81 bt full
  82 info locals
  83 quit
  84 EOF
  85         ${DB_BIN} -x "${BATCHFILE_MAIN}" "${BINARY}" "${PID}"
  86         ;;
  87 esac
  88 /bin/rm -f ${BATCHFILE_PRE} ${BATCHFILE_MAIN}