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         #
  34         # On solaris dbx is working way more better than gdb
  35         # let's try it first
  36         #
  37         SunOS)
  38                 DB_LIST="dbx ${DB_LIST}"
  39         ;;
  40         #
  41         # FreeBSD comes with a flavor that works gdb66 and one that don't gdb
  42         # (gdb 6.1) let's try it first the one that works !
  43         #
  44         FreeBSD)
  45                 DB_LIST="gdb66 ${DB_LIST}"
  46         ;;
  47 esac
  48
  49 for DB in ${DB_LIST}; do
  50         DB_BIN=`which ${DB} 2>/dev/null | grep '^/'`
  51         test x"${DB_BIN}" != x"" && {
  52                 break
  53         }
  54 done
  55
  56 test x"${DB_BIN}" = x"" && {
  57         echo "${BASENAME}: ERROR: No debugger found."
  58         exit 1
  59 }
  60
  61 #
  62 # we first try to use /proc/${PID}/exe or /proc/{$PID}/path for solaris
  63 # then fallback to the binary from the commandline
  64 # then we search for the commandline argument with
  65 # 'which'
  66 #
  67 test -f "/proc/${PID}/exe" && BINARY="/proc/${PID}/exe"
  68 test -f "/proc/${PID}/path/a.out" && BINARY=`ls -l /proc/${PID}/path/a.out |sed 's/.*-> //'`
  69 test x"${BINARY}" = x"" && BINARY="/proc/${PID}/exe"
  70 test -f "${BINARY}" || BINARY=`which ${BINARY}`
  71
  72 test -f "${BINARY}" || {
  73         echo "${BASENAME}: ERROR: Cannot find binary '${BINARY}'."
  74         exit 1
  75 }
  76
  77 echo "${BASENAME}: Trying to use ${DB_BIN} on ${BINARY} on PID ${PID}"
  78
  79 BATCHFILE_PRE=/tmp/gdb_backtrace_pre.$$
  80 BATCHFILE_MAIN=/tmp/gdb_backtrace_main.$$
  81 case "${DB}" in
  82         ladebug)
  83 cat << EOF  > ${BATCHFILE_PRE}
  84 set \$stoponattach
  85 EOF
  86
  87 cat << EOF  > ${BATCHFILE_MAIN}
  88 where
  89 quit
  90 EOF
  91         ${DB_BIN} -c "${BATCHFILE_MAIN}" -i "${BATCHFILE_PRE}" -pid "${PID}" "${BINARY}"
  92         ;;
  93         gdb66)
  94 cat << EOF  > ${BATCHFILE_MAIN}
  95 set height 1000
  96 bt full
  97 info locals
  98 kill
  99 quit
 100 EOF
 101         ${DB_BIN} -x "${BATCHFILE_MAIN}" "${BINARY}" "${PID}"
 102         ;;
 103         gdb)
 104 cat << EOF  > ${BATCHFILE_MAIN}
 105 set height 0
 106 bt full
 107 thread apply all bt full
 108 info locals
 109 quit
 110 EOF
 111         ${DB_BIN} -batch -x "${BATCHFILE_MAIN}" --pid "${PID}" < /dev/null
 112         ;;
 113 dbx)
 114         ${DB_BIN} "where;dump;kill;quit" "${BINARY}" "${PID}"
 115         ;;
 116 esac
 117 /bin/rm -f ${BATCHFILE_PRE} ${BATCHFILE_MAIN}