android_run_skia: dump logcat on failure

platform_tools/android/bin/android_run_skia

 #!/bin/bash
 #
 # android_run_skia: starts the correct skia program on the device, prints the
 # output, and kills the app if interrupted.
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 source $SCRIPT_DIR/android_setup.sh
 source $SCRIPT_DIR/utils/setup_adb.sh
 
 if [ ! -f "${SKIA_OUT}/$BUILDTYPE/lib/lib${APP_ARGS[0]}.so" ];
 then
   echo "Unable to find $BUILDTYPE ${APP_ARGS[0]} library"
   exit 1
 fi
 
 adb_push_if_needed "${SKIA_OUT}/$BUILDTYPE/skia_launcher" /data/local/tmp
 if [ -f "${SKIA_OUT}/$BUILDTYPE/lib/libskia_android.so" ]; then
     # Does not exist for builds with static skia.
     adb_push_if_needed "${SKIA_OUT}/$BUILDTYPE/lib/libskia_android.so" /data/local/tmp
 fi
 adb_push_if_needed "${SKIA_OUT}/$BUILDTYPE/lib/lib${APP_ARGS[0]}.so" /data/local/tmp
 if [[ -n $RESOURCE_PATH ]]; then
   adb_push_if_needed "${SKIA_SRC_DIR}/resources" $RESOURCE_PATH
 fi
 
+if [ $LOGCAT ]; then $ADB $DEVICE_SERIAL logcat -c; fi
 STATUS_FILENAME="/data/local/tmp/.skia_tmp_$(date +%s%N)"
 $ADB ${DEVICE_SERIAL} shell \
     "LD_LIBRARY_PATH=/data/local/tmp:$LD_LIBRARY_PATH \
      /data/local/tmp/skia_launcher ${APP_ARGS[*]}; echo \$? > ${STATUS_FILENAME}"
 if [ -z "$($ADB $DEVICE_SERIAL shell 'if [ -f $STATUS_FILENAME ]; then echo exists; fi')" ]; then
+  if [ $LOGCAT ]; then $ADB $DEVICE_SERIAL logcat -d; fi
   echo "***********************************************************************"
   echo "The application terminated unexpectedly and did not produce an exit code"
   echo "***********************************************************************"
   exit 1
 fi
 
 EXIT_CODE=`$ADB ${DEVICE_SERIAL} shell cat ${STATUS_FILENAME}`
 $ADB ${DEVICE_SERIAL} shell rm -f ${STATUS_FILENAME}
 
 # check to see if the 'cat' command failed and print errors accordingly
 if [[ ${EXIT_CODE} == *${STATUS_FILENAME}* ]]; then
+  if [ $LOGCAT ]; then $ADB $DEVICE_SERIAL logcat -d; fi
   echo "***********************************************************************"
   echo "ADB failed to retrieve the application's exit code"
   echo "***********************************************************************"
   exit 1
 fi
 
 echo "EXIT_CODE is ${EXIT_CODE}"
 if [ $'0\r' != "${EXIT_CODE}" ]; then
+  if [ $LOGCAT ]; then $ADB $DEVICE_SERIAL logcat -d; fi
   exit 1
 fi
 exit 0