#!/bin/bash
#
#   winedbg-eclipse - winedbg wrapper for Eclipse IDE
#
#   2012-04-14 first draft
#

GDB=gdb
SETSID=setsid
MKTEMPU="mktemp --tmpdir -u winedbg-eclipse.XXXXXXXXXX"
TRACEFILE="$HOME/winedbg-eclipse.log"

# debug with installed wine
WINECMD=/usr/bin/wine
WINEBINARY=/usr/bin/wine

# debug with wine sources
#export WINEPREFIX=~/.winetest # don't mess up my ~/.wine
#WINEBUILDDIR="/media/ARCHLINUXOLD/1/builds/wine/src/wine"
#WINECMD="$WINEBUILDDIR/wine"
#WINEBINARY="$WINEBUILDDIR/loader/wine"

set -e 

case "$*" in
"--version")
  exec $GDB "$@"
  ;;
"--interpreter mi2 --nx")
  ;;
*)
  echo unknown arguments: "$@" >&2
  exit 1
  ;;
esac

fn_commandfilter() {

  while read -r s; do
    printf 'you wrote: %s\n' "$s" >&3
    set -- $s
    case "$1" in
    *-file-exec-and-symbols)
      echo "recognized command: -file-exec-and-symbols" >&3

      s="$1 $WINEBINARY"

      printf 'I send: %s\n' "$s" >&3
      printf '%s\n' "$s"

      [ "$2" != "--thread-group" ] || shift 2
      file=$2

      # need to send 'target remote' immediatly, so breakpoints properly restored

      fifo=`$MKTEMPU`
      mkfifo $fifo

      set -- "$WINECMD" winedbg --gdb --no-start "$file"

      echo "executing command: $SETSID" "$@" "</dev/null >$fifo &" >&3
      # run winedbg protected from C^c
      $SETSID "$@" </dev/null >$fifo 2>&1 &
      winedbg_pid=$!
      echo "waiting 10 seconds for 'target remote'" >&3
      {
        sleep 10
        echo "wait timeout. killing winedbg" >&3
        kill $winedbg_pid
      } &
      killer_pid=$!
      while read -r s <$fifo ; do
        printf 'winedbg: %s\n' "$s" >&3
        case "$s" in
        "target "*)
          #s="$numcmd-target-select ${s/target /}"
          printf 'I send: %s\n' "$s" >&3
          printf '%s\n' "$s"
          break;
          ;;
        esac
      done
      kill $killer_pid

      echo "reading winedbg in background" >&3
      while read -r s <$fifo ; do
        printf 'winedbg: %s\n' "$s" >&3
      done &

      rm $fifo

      continue
      ;;
    *-exec-run)
      echo "recognized command: -exec-run" >&3
      # dummy command because eclipse expects $numcmd^done
      numcmd=${s/-*/}
      echo $numcmd^done >&4
      continue
      ;;
    esac
    printf 'I send: %s\n' "$s" >&3
    printf '%s\n' "$s"
  done
}

exec 3>>"$TRACEFILE"

# save original stdout for fake GDB replies
exec 4>&1


{
  echo --------------------------------------
  echo
  echo
  echo
} >&3

fifo=`$MKTEMPU`
echo "mkfifo $fifo" >&3
mkfifo $fifo

fn_commandfilter <&0 >$fifo &
commandfilter_pid=$!

trap 'kill $commandfilter_pid 2>/dev/null' EXIT

trap 'echo INT 1 >&3' INT

exec 5<$fifo
rm $fifo

$GDB "$@" <&5

#| {
#trap 'echo INT 3 >&3' INT
#while read -r s; do
#    printf 'GDB replies: %s\n' "$s" >&3
#    printf '%s\n' "$s"
#done
#}