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

tools/linux-tick-processor

Index: tools/linux-tick-processor
diff --git a/tools/linux-tick-processor b/tools/linux-tick-processor
index ca1c7212641d2316ce1a47796cf75561e47d2984..17157050df7630f5691622f133500f7b6549cb13 100755
--- a/tools/linux-tick-processor
+++ b/tools/linux-tick-processor
@@ -16,8 +16,17 @@ else
   [ -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 \