selftest/gdb_backtrace

   1 #!/bin/sh
   2
   3 BASENAME=$(basename $0)
   4
   5 unset LD_PRELOAD
   6
   7 if [ -n "$VALGRIND" -o -n "$SMBD_VALGRIND" ]; then
   8         echo "${BASENAME}: Not running debugger under valgrind"
   9         exit 1
  10 fi
  11
  12 if [ "x$PLEASE_NO_GDB_BACKTRACE" != "x" ]; then
  13         echo "${BASENAME}: Not running debugger because PLEASE_NO_GDB_BACKTRACE is set"
  14         exit 0
  15 fi
  16
  17 # we want everything on stderr, so the program is not disturbed
  18 exec 1>&2
  19
  20 UNAME=$(uname)
  21
  22 PID=$1
  23 BINARY=$2
  24
  25 test x"${PID}" = x"" && {
  26         echo "Usage: ${BASENAME} <pid> [<binary>]"
  27         exit 1
  28 }
  29
  30 DB_LIST="gdb"
  31 case "${UNAME}" in
  32 #
  33 # on Tru64 we need to try ladebug first
  34 # because gdb crashes itself...
  35 #
  36 OSF1)
  37         DB_LIST="ladebug ${DB_LIST}"
  38         ;;
  39 #
  40 # On solaris dbx is working way more better than gdb
  41 # let's try it first
  42 #
  43 SunOS)
  44         DB_LIST="dbx ${DB_LIST}"
  45         ;;
  46 #
  47 # FreeBSD comes with a flavor that works gdb66 and one that don't gdb
  48 # (gdb 6.1) let's try it first the one that works !
  49 #
  50 FreeBSD)
  51         DB_LIST="gdb66 ${DB_LIST}"
  52         ;;
  53 esac
  54
  55 for DB in ${DB_LIST}; do
  56         DB_BIN=$(which ${DB} 2>/dev/null | grep '^/')
  57         test x"${DB_BIN}" != x"" && {
  58                 break
  59         }
  60 done
  61
  62 test x"${DB_BIN}" = x"" && {
  63         echo "${BASENAME}: ERROR: No debugger found."
  64         exit 1
  65 }
  66
  67 need_binary="no"
  68 case "${DB}" in
  69 # These debuggers need the process binary specified:
  70 ladebug)
  71         need_binary="yes"
  72         ;;
  73 gdb66)
  74         need_binary="yes"
  75         ;;
  76 dbx)
  77         need_binary="yes"
  78         ;;
  79 esac
  80
  81 test x"${need_binary}" = x"yes" && {
  82
  83         # we first try to use /proc/${PID}/exe or /proc/{$PID}/path for solaris
  84         # then fallback to the binary from the commandline
  85         # then we search for the commandline argument with
  86         # 'which'
  87         #
  88         test -f "/proc/${PID}/exe" && BINARY="/proc/${PID}/exe"
  89         test -f "/proc/${PID}/path/a.out" && BINARY=$(ls -l /proc/${PID}/path/a.out | sed 's/.*-> //')
  90         test x"${BINARY}" = x"" && BINARY="/proc/${PID}/exe"
  91         test -f "${BINARY}" || BINARY=$(which ${BINARY})
  92
  93         test -f "${BINARY}" || {
  94                 echo "${BASENAME}: ERROR: Cannot find binary '${BINARY}'."
  95                 exit 1
  96         }
  97 }
  98
  99 BATCHFILE_PRE=$(mktemp --tmpdir gdb_backtrace_pre.XXXXXXXXXX)
 100 test -n "${BATCHFILE_PRE}" || {
 101         echo "mktemp doesn't work" 1>&2
 102         exit 1
 103 }
 104 BATCHFILE_MAIN=$(mktemp --tmpdir gdb_backtrace_main.XXXXXXXXXX)
 105 test -n "${BATCHFILE_MAIN}" || {
 106         echo "mktemp doesn't work" 1>&2
 107         exit 1
 108 }
 109 case "${DB}" in
 110 ladebug)
 111         cat <<EOF >${BATCHFILE_PRE}
 112 set \$stoponattach
 113 EOF
 114
 115         cat <<EOF >${BATCHFILE_MAIN}
 116 where
 117 quit
 118 EOF
 119         ${DB_BIN} -c "${BATCHFILE_MAIN}" -i "${BATCHFILE_PRE}" -pid "${PID}" "${BINARY}"
 120         ;;
 121 gdb66)
 122         cat <<EOF >${BATCHFILE_MAIN}
 123 set height 1000
 124 bt full
 125 info locals
 126 kill
 127 quit
 128 EOF
 129         ${DB_BIN} -x "${BATCHFILE_MAIN}" "${BINARY}" "${PID}"
 130         ;;
 131 gdb)
 132         cat <<EOF >${BATCHFILE_MAIN}
 133 set height 0
 134 bt full
 135 thread apply all bt full
 136 info locals
 137 quit
 138 EOF
 139         ${DB_BIN} -batch -x "${BATCHFILE_MAIN}" --pid "${PID}" </dev/null
 140         ;;
 141 dbx)
 142         ${DB_BIN} "where;dump;kill;quit" "${BINARY}" "${PID}"
 143         ;;
 144 esac
 145 /bin/rm -f ${BATCHFILE_PRE} ${BATCHFILE_MAIN}