Add v8.log visualizer page.

tools/profviz/worker.js

+// Copyright 2013 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.
+
+var delegateList = {
+  "load scripts" : load_scripts,
+  "run" : run,
+}
+
+self.addEventListener("message", function(event) {
+  var call = delegateList[event.data["call"]];
+  var result = call(event.data["args"]);
+}, false);
+
+
+function log(text) {
+  self.postMessage({ "call" : "log", "args" : text });
+}
+
+
+function display(content) {
+  self.postMessage({ "call" : "display", "args" : content});
+}
+
+
+function setRange(start, end) {
+  self.postMessage({ "call" : "range",
+                     "args" : { "start" : start, "end" : end } });
+}
+
+
+function time(name, fun) {
+  log(name + "...");
+  var start = Date.now();
+  fun();
+  log(" took " + (Date.now() - start) / 1000 + "s.\n");
+}
+
+
+function load_scripts(scripts) {
+  time("Loading scripts",
+       function() { for (var i in scripts) importScripts(scripts[i]); });
+  self.postMessage({ "call" : "script" });
+}
+
+
+function run(args) {
+  var file = args["file"];
+  var resx = args["resx"];
+  var resy = args["resy"];
+  var distortion = args["distortion"];
+  var range_start_override = args["range_start"];
+  var range_end_override = args["range_end"];
+
+  var reader = new FileReaderSync();
+  var content_lines;
+
+  time("Reading log file (" + Math.round(file.size / 1024) + " kB)",
+       function() {
+         var content = reader.readAsText(file);
+         content_lines = content.split("\n");
+       });
+
+  var input_file_name = "input_temp";
+  var output_file_name = "output.svg";
+
+  var psc = new PlotScriptComposer(resx, resy);
+  var objects = 0;
+
+  time("Analyzing data (" + content_lines.length + " entries)",
+       function() {
+         var line_cursor = 0;
+         var input = function() { return content_lines[line_cursor++]; };
+         psc.collectData(input, distortion);
+         psc.findPlotRange(range_start_override,
+                           range_end_override,
+                           setRange);
+       });
+
+  time("Assembling plot script",
+       function() {
+         var plot_script = "";
+         var output = function(output) { plot_script += output + "\n"; };
+         output("set terminal svg size " + resx + "," + resy +
+                " enhanced font \"Helvetica,10\"");
+         output("set output \""+ output_file_name + "\"");
+         objects = psc.assembleOutput(output);
+         if (FS.findObject(input_file_name)) {
+           FS.deleteFile(input_file_name);
+         }
+         var arrc = Module["intArrayFromString"](plot_script, true);
+         FS.createDataFile("/", input_file_name, arrc);
+       });
+
+  time("Running Gnuplot (" + objects + " objects)",
+       function() { Module.run([input_file_name]); });
+
+  display(FS.findObject(output_file_name));
+}
+
+
+var Module = {
+    "noInitialRun": true,
+    print: function(text) {
+        self.postMessage({"call": "error", "args": text});
+    },
+    printErr: function(text) {
+        self.postMessage({"call": "error", "args": text});
+    },
+};
+