利用 GDB Debug Android SurfaceFlinger

gdbclient

相关文件:android-4.1.1_r1/build/envsetup.sh

function gdbclient(){   local OUT_ROOT=$(get_abs_build_var PRODUCT_OUT)   local OUT_SYMBOLS=$(get_abs_build_var TARGET_OUT_UNSTRIPPED)   local OUT_SO_SYMBOLS=$(get_abs_build_var TARGET_OUT_SHARED_LIBRARIES_UNSTRIPPED)   local OUT_EXE_SYMBOLS=$(get_abs_build_var TARGET_OUT_EXECUTABLES_UNSTRIPPED)   local PREBUILTS=$(get_abs_build_var ANDROID_PREBUILTS)   local ARCH=$(get_build_var TARGET_ARCH)   local GDB   case "$ARCH" in       x86) GDB=i686-android-linux-gdb;;       arm) GDB=arm-linux-androideabi-gdb;;       *) echo "Unknown arch $ARCH"; return 1;;   esac    if [ "$OUT_ROOT" -a "$PREBUILTS" ]; then       local EXE="$1"       if [ "$EXE" ] ; then           EXE=$1       else           EXE="app_process"       fi        local PORT="$2"       if [ "$PORT" ] ; then           PORT=$2       else           PORT=":5039"       fi        local PID       local PROG="$3"       if [ "$PROG" ] ; then           if [[ "$PROG" =~ ^[0-9]+$ ]] ; then               PID="$3"           else               PID=`pid $3`           fi           adb forward "tcp$PORT" "tcp$PORT"           adb shell gdbserver $PORT --attach $PID &           sleep 2       else               echo ""               echo "If you haven't done so already, do this first on the device:"               echo "    gdbserver $PORT /system/bin/$EXE"                   echo " or"               echo "    gdbserver $PORT --attach $PID"               echo ""       fi        echo >|"$OUT_ROOT/gdbclient.cmds" "set solib-absolute-prefix $OUT_SYMBOLS"       echo >>"$OUT_ROOT/gdbclient.cmds" "set solib-search-path $OUT_SO_SYMBOLS:$OUT_SO_SYMBOLS/hw:$OUT_SO_SYMBOLS/ssl/engines"       echo >>"$OUT_ROOT/gdbclient.cmds" "target remote $PORT"       echo >>"$OUT_ROOT/gdbclient.cmds" ""        $ANDROID_TOOLCHAIN/$GDB -x "$OUT_ROOT/gdbclient.cmds" "$OUT_EXE_SYMBOLS/$EXE"  else       echo "Unable to determine build system output dir."   fi }

gdbclient.cmds

gdbclient.cmds包含如下信息:

set solib-absolute-prefix /local/r/android-4.1.1_r1/out/target/product/diablohd/symbolsset solib-search-path /local/r/android-4.1.1_r1/out/target/product/diablohd/symbols/system/lib:/local/r/android-4.1.1_r1/out/target/product/diablohd/symbols/system/lib/hw:/local/r/android-4.1.1_r1/out/target/product/diablohd/symbols/system/lib/ssl/enginestarget remote :5039

脚本用来生成所需的gdbclient.cmds:

create_gdbclient_cmds.sh

#! /bin/bash P=${1}D=${2} if [ -z "${P}" -o -z "${D}" ] ; thenecho "usage: ${0} <path> <product>"echo "    ${0} /local/projects/android-4.1.1_r1 diablo"exit 1fi cat << EOF > gdbclient.cmdsset solib-absolute-prefix ${P}/out/target/product/${D}/symbolsset solib-search-path ${P}/out/target/product/${D}/symbols/system/lib:${P}/out/target/product/${D}/symbols/system/lib/hw:${P}/out/target/product/${D}/symbols/system/lib/ssl/enginestarget remote :5039 EOF

在一个terminal上执行:

$ adb forward tcp:5039 tcp:5039$ adb shell gdbserver :5039 --attach `adb shell ps surfaceflinger | grep surfaceflinger | awk '{ print $2 }'`

在另外一个terminal上执行:

$ cd /local/projects/diablo-china-v1.0-dint$ ./create_gdbclient_cmds.sh `pwd` jrdsh77_cu_jb$ prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-gdb -x gdbclient.cmds out/target/product/jrdsh77_cu_jb/symbols/system/bin/surfaceflinger