[Interpreter] Add a bytecode annotate tool.

tools/run-perf.sh

 #! /bin/sh
 #
 # Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 
 ########## Global variable definitions
 
 # Ensure that <your CPU clock> / $SAMPLE_EVERY_N_CYCLES < $MAXIMUM_SAMPLE_RATE.
 MAXIMUM_SAMPLE_RATE=10000000
 SAMPLE_EVERY_N_CYCLES=10000
 SAMPLE_RATE_CONFIG_FILE="/proc/sys/kernel/perf_event_max_sample_rate"
 KERNEL_MAP_CONFIG_FILE="/proc/sys/kernel/kptr_restrict"
 CALL_GRAPH_METHOD="fp"  # dwarf does not play nice with JITted objects.
+EVENT_TYPE=${EVENT_TYPE:=cycles:u}
 
 ########## Usage
 
 usage() {
 cat << EOF
 usage: $0 <benchmark_command>
 
 Executes <benchmark_command> under observation by Linux perf.
 Sampling event is cycles in user space, call graphs are recorded.
 EOF
@@ skipping 13 matching lines @@
 fi
 
 ACTUAL_KERNEL_MAP_RESTRICTION=$(cat $KERNEL_MAP_CONFIG_FILE)
 if [ "$ACTUAL_KERNEL_MAP_RESTRICTION" -ne "0" ] ; then
   echo "Disabling kernel address map restriction..."
   echo 0 | sudo tee $KERNEL_MAP_CONFIG_FILE
 fi
 
 echo "Running..."
 perf record -R \
-  -e cycles:u \
+  -e $EVENT_TYPE \
   -c $SAMPLE_EVERY_N_CYCLES \
   --call-graph $CALL_GRAPH_METHOD \
   -i $@ --perf_basic_prof