third_party/WebKit/Tools/Scripts/debug-renderer

   1 #!/bin/bash
   2 # Copyright 2015 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 # Runs Chrome / content_shell and attaches to the first renderer process in gdb.
   7
   8 RENDERER_PID_RE='Renderer \(([0-9]+)\) paused waiting for debugger'
   9 TARGET_FLAGS="--no-sandbox --renderer-startup-dialog"
  10 TARGET=$1
  11 shift
  12
  13 if [ -z "$TARGET" ]; then
  14   echo "usage: $(basename $0) <path-to-content-shell> [more-args...]"
  15   exit 1
  16 fi
  17
  18 if [ -z "$DEBUGGER" ]; then
  19   if which lldb > /dev/null; then
  20     DEBUGGER="lldb"
  21     CONTINUE="continue"
  22   elif which gdb > /dev/null; then
  23     DEBUGGER="gdb -q"
  24     CONTINUE="signal SIGUSR1"
  25   else
  26     echo "no debugger found"
  27     exit 1
  28   fi
  29 fi
  30
  31 OUTPUT=$(mktemp "${TMPDIR:-/tmp}"/"$(basename $0)".XXXXX)
  32 "$TARGET" $TARGET_FLAGS "$@" 2>&1 | tee $OUTPUT &
  33 BROWSER_PID=$!
  34
  35 wait_renderer_pid() {
  36   for i in {1..100}; do
  37     browser_running || return
  38     RENDERER_PID=$(renderer_pid)
  39     [ -n "$RENDERER_PID" ] && return
  40     sleep 0.2
  41   done
  42 }
  43
  44 browser_running() { ps -p $BROWSER_PID > /dev/null; }
  45 renderer_pid() { [[ "$(cat $OUTPUT)" =~ $RENDERER_PID_RE ]] && echo ${BASH_REMATCH[1]}; }
  46
  47 wait_renderer_pid
  48 if [ -n "$RENDERER_PID" ]; then
  49   # print yellow message
  50   echo -e "\n\033[1;33mDebugging renderer, use '$CONTINUE' to run.\033[0m\n"
  51   $DEBUGGER -p $RENDERER_PID
  52 fi
  53
  54 wait
  55 rm $OUTPUT