Profiler tick processor: exploit d8's readline to avoid reading

tools/linux-tick-processor

 #!/bin/sh
 
 tools_path=`cd $(dirname "$0");pwd`
 if [ ! "$D8_PATH" ]; then
   d8_public=`which d8`
   if [ $d8_public ]; then D8_PATH=$(dirname "$d8_public"); fi
 fi
 [ "$D8_PATH" ] || D8_PATH=$tools_path/..
 d8_exec=$D8_PATH/d8
 
 if [ "$1" == "--no-build" ]; then
   shift
 else
 # compile d8 if it doesn't exist, assuming this script
 # resides in the repository.
   [ -x $d8_exec ] || scons -j4 -C $D8_PATH -Y $tools_path/.. d8
 fi
 
+# find the name of the log file to process, it must not start with a dash.
+log_file="v8.log"
+for arg in "$@"
+do
+  if [[ "${arg}" != -* ]]; then
+    log_file=${arg}
+  fi
+done
+
 # nm spits out 'no symbols found' messages to stderr.
-$d8_exec $tools_path/splaytree.js $tools_path/codemap.js \
+cat $log_file | $d8_exec $tools_path/splaytree.js $tools_path/codemap.js \
   $tools_path/csvparser.js $tools_path/consarray.js \
   $tools_path/profile.js $tools_path/profile_view.js \
   $tools_path/logreader.js $tools_path/tickprocessor.js \
   $tools_path/tickprocessor-driver.js -- $@ 2>/dev/null