Add support for running low level profiler on Android.

tools/android-ll-prof.sh

 #!/bin/bash
 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
 #       with the distribution.
 #     * Neither the name of Google Inc. nor the names of its
 #       contributors may be used to endorse or promote products derived
 #       from this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-# Checks that the number of compilation units having at least one static
-# initializer in d8 matches the one defined below.
-# Note that the project must be built with SCons before running this script.
+# Runs d8 with the given arguments on the device under 'perf' and
+# processes the profiler trace and v8 logs using ll_prof.py.
+# 
+# Usage:
+# > ./tools/android-ll-prof.sh (debug|release) "args to d8" "args to ll_prof.py"
+#
+# The script creates deploy directory deploy/data/local/tmp/v8, copies there
+# the d8 binary either from out/android_arm.release or out/android_arm.debug,
+# and then sync the deploy directory with /data/local/tmp/v8 on the device.
+# You can put JS files in the deploy directory before running the script.
+# Note: $ANDROID_NDK_ROOT must be set.
 
-# Allow:
-#  - _GLOBAL__I__ZN2v810LineEditor6first_E
-#  - _GLOBAL__I__ZN2v88internal32AtomicOps_Internalx86CPUFeaturesE
-#  - _GLOBAL__I__ZN2v88internal8ThreadId18highest_thread_id_E
-expected_static_init_count=3
+MODE=$1
+RUN_ARGS=$2
+LL_PROF_ARGS=$3
 
-v8_root=$(readlink -f $(dirname $BASH_SOURCE)/../)
+BASE=`cd $(dirname "$0")/..; pwd`
+DEPLOY="$BASE/deploy"
 
-if [ -n "$1" ] ; then
-  d8="${v8_root}/$1"
-else
-  d8="${v8_root}/d8"
-fi
+set +e
+mkdir -p "$DEPLOY/data/local/tmp/v8"
 
-if [ ! -f "$d8" ]; then
-  echo "d8 binary not found: $d8"
-  exit 1
-fi
+cp "$BASE/out/android_arm.$MODE/d8" "$DEPLOY/data/local/tmp/v8/d8"
 
-static_inits=$(nm "$d8" | grep _GLOBAL_ | grep _I_ | awk '{ print $NF; }')
+adb -p "$DEPLOY" sync data
 
-static_init_count=$(echo "$static_inits" | wc -l)
+adb shell "cd /data/local/tmp/v8;\
+           perf record -R -e cycles -c 10000 -f -i \
+           ./d8 --ll_prof --gc-fake-mmap=/data/local/tmp/__v8_gc__ $RUN_ARGS"
 
-if [ $static_init_count -gt $expected_static_init_count ]; then
-  echo "Too many static initializers."
-  echo "$static_inits"
-  exit 1
-else
-  echo "Static initializer check passed ($static_init_count initializers)."
-  exit 0
-fi
+adb pull /data/local/tmp/v8/v8.log .
+adb pull /data/local/tmp/v8/v8.log.ll .
+adb pull /data/perf.data .
+
+ARCH=arm-linux-androideabi-4.4.3
+TOOLCHAIN="${ANDROID_NDK_ROOT}/toolchains/$ARCH/prebuilt/linux-x86/bin"
+
+$BASE/tools/ll_prof.py --host-root="$BASE/deploy" \
+                       --gc-fake-mmap=/data/local/tmp/__v8_gc__ \
+                       --objdump="$TOOLCHAIN/arm-linux-androideabi-objdump" \
+                       $LL_PROF_ARGS