Add --port option to adb_gdb to allow simultaneous debugging of browser and render processes.

build/android/adb_gdb

 #!/bin/bash
 #
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 
 # A generic script used to attach to a running Chromium process and
 # debug it. Most users should not use this directly, but one of the
 # wrapper scripts like adb_gdb_content_shell
@@ skipping 79 matching lines @@
 BUILDTYPE=
 FORCE=
 GDBEXEPOSTFIX=gdb
 GDBINIT=
 GDBSERVER=
 HELP=
 NDK_DIR=
 NO_PULL_LIBS=
 PACKAGE_NAME=
 PID=
+PORT=
 PRIVILEGED=
 PRIVILEGED_INDEX=
 PROGRAM_NAME="activity"
 PULL_LIBS=
 PULL_LIBS_DIR=
 SANDBOXED=
 SANDBOXED_INDEX=
 START=
 SU_PREFIX=
 SYMBOL_DIR=
@@ skipping 30 matching lines @@
       ;;
     --no-pull-libs)
       NO_PULL_LIBS=true
       ;;
     --package-name=*)
       PACKAGE_NAME=$optarg
       ;;
     --pid=*)
       PID=$optarg
       ;;
+    --port=*)
+      PORT=$optarg
+      ;;
     --privileged)
       PRIVILEGED=true
       ;;
     --privileged=*)
       PRIVILEGED=true
       PRIVILEGED_INDEX=$optarg
       ;;
     --program-name=*)
       PROGRAM_NAME=$optarg
       ;;
@@ skipping 162 matching lines @@
   --start               Start package's activity on device.
   --ui                  Use gdbtui instead of gdb
   --activity=<name>     Activity name for --start [$DEFAULT_ACTIVITY].
   --annotate=<num>      Enable gdb annotation.
   --script=<file>       Specify extra GDB init script.
 
   --gdbserver=<file>    Specify target gdbserver binary.
   --gdb=<file>          Specify host gdb client binary.
   --target-arch=<name>  Specify NDK target arch.
   --adb=<file>          Specify host ADB binary.
+  --port=<port>         Specify the tcp port to use.
 
   --su-prefix=<prefix>  Prepend <prefix> to 'adb shell' commands that are
                         run by this script. This can be useful to use
                         the 'su' program on rooted production devices.
                         e.g. --su-prefix="su -c"
 
   --pull-libs           Force system libraries extraction.
   --no-pull-libs        Do not extract any system library.
   --libs-dir=<path>     Specify system libraries extraction directory.
 
@@ skipping 584 matching lines @@
 # properly.
 #
 
 # Push gdbserver to the device
 log "Pushing gdbserver $GDBSERVER to $TARGET_GDBSERVER"
 adb push $GDBSERVER $TMP_TARGET_GDBSERVER &>/dev/null
 adb shell $COMMAND_PREFIX cp $TMP_TARGET_GDBSERVER $TARGET_GDBSERVER
 adb shell rm $TMP_TARGET_GDBSERVER
 fail_panic "Could not copy gdbserver to the device!"
 
-PORT=5039
+if [ -z "$PORT" ]; then
+    PORT=5039
+fi
 HOST_PORT=$PORT
 TARGET_PORT=$PORT
 
 # Select correct app_process for architecture.
 case $TARGET_ARCH in
       arm|x86|mips) GDBEXEC=app_process;;
       arm64|x86_64) GDBEXEC=app_process64;;
       *) fail_panic "Unknown app_process for architecture!";;
 esac
 
@@ skipping 84 matching lines @@
 
 if [ "$VERBOSE" -gt 0 ]; then
   echo "### START $COMMANDS"
   cat $COMMANDS
   echo "### END $COMMANDS"
 fi
 
 log "Launching gdb client: $GDB $GDB_ARGS -x $COMMANDS"
 $GDB $GDB_ARGS -x $COMMANDS &&
 rm -f "$GDBSERVER_PIDFILE"