Add better consistency check and error output to plot script.

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23736004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16537 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/plot-timer-events

@@ -67,4 +67,13 @@ cat $log_file |
     $tools_path/codemap.js $tools_path/profile.js $tools_path/profile_view.js \
     $tools_path/logreader.js $tools_path/tickprocessor.js \
     $tools_path/profviz/composer.js $tools_path/profviz/stdio.js \
-    -- $@ $options 2>/dev/null | gnuplot > timer-events.png
+    -- $@ $options 2>/dev/null > timer-events.plot
+
+success=$?
+if [[ $success != 0 ]] ; then
+    cat timer-events.plot
+else
+    cat timer-events.plot | gnuplot > timer-events.png
+fi
+
+rm -f timer-events.plot

tools/profviz/composer.js

@@ -31,7 +31,7 @@ Array.prototype.top = function() {
 }
 
 
-function PlotScriptComposer(kResX, kResY) {
+function PlotScriptComposer(kResX, kResY, error_output) {
   // Constants.
   var kV8BinarySuffixes = ["/d8", "/libv8.so"];
   var kStackFrames = 8;             // Stack frames to display in the plot.
@@ -149,7 +149,10 @@ function PlotScriptComposer(kResX, kResY) {
 
   // Utility functions.
   function assert(something, message) {
-    if (!something) print(new Error(message).stack);
+    if (!something) {
+      var error = new Error(message);
+      error_output(error.stack);
+    }
   }
 
   function FindCodeKind(kind) {
@@ -208,70 +211,16 @@ function PlotScriptComposer(kResX, kResY) {
   // Public methods.
   this.collectData = function(input, distortion_per_entry) {
 
+    var last_timestamp = 0;
+
     // Parse functions.
     var parseTimeStamp = function(timestamp) {
+      int_timestamp = parseInt(timestamp);
+      assert(int_timestamp >= last_timestamp, "Inconsistent timestamps.");
+      last_timestamp = int_timestamp;
       distortion += distortion_per_entry;
-      return parseInt(timestamp) / 1000 - distortion;
-    }
-
-    var processTimerEventStart = function(name, start) {
-      // Find out the thread id.
-      var new_event = TimerEvents[name];
-      if (new_event === undefined) return;
-      var thread_id = new_event.thread_id;
-
-      start = Math.max(last_time_stamp[thread_id] + kMinRangeLength, start);
-
-      // Last event on this thread is done with the start of this event.
-      var last_event = event_stack[thread_id].top();
-      if (last_event !== undefined) {
-        var new_range = new Range(last_time_stamp[thread_id], start);
-        last_event.ranges.push(new_range);
-      }
-      event_stack[thread_id].push(new_event);
-      last_time_stamp[thread_id] = start;
-    };
-
-    var processTimerEventEnd = function(name, end) {
-      // Find out about the thread_id.
-      var finished_event = TimerEvents[name];
-      var thread_id = finished_event.thread_id;
-      assert(finished_event === event_stack[thread_id].pop(),
-             "inconsistent event stack");
-
-      end = Math.max(last_time_stamp[thread_id] + kMinRangeLength, end);
-
-      var new_range = new Range(last_time_stamp[thread_id], end);
-      finished_event.ranges.push(new_range);
-      last_time_stamp[thread_id] = end;
-    };
-
-    var processCodeCreateEvent = function(type, kind, address, size, name) {
-      var code_entry = new CodeMap.CodeEntry(size, name);
-      code_entry.kind = kind;
-      code_map.addCode(address, code_entry);
-    };
-
-    var processCodeMoveEvent = function(from, to) {
-      code_map.moveCode(from, to);
-    };
-
-    var processCodeDeleteEvent = function(address) {
-      code_map.deleteCode(address);
-    };
-
-    var processSharedLibrary = function(name, start, end) {
-      var code_entry = new CodeMap.CodeEntry(end - start, name);
-      code_entry.kind = -2;  // External code kind.
-      for (var i = 0; i < kV8BinarySuffixes.length; i++) {
-        var suffix = kV8BinarySuffixes[i];
-        if (name.indexOf(suffix, name.length - suffix.length) >= 0) {
-          code_entry.kind = -1;  // V8 runtime code kind.
-          break;
+      return int_timestamp / 1000 - distortion;
     }
-      }
-      code_map.addLibrary(start, code_entry);
-    };
 
     var processTimerEventStart = function(name, start) {
       // Find out the thread id.

tools/profviz/profviz.html

@@ -96,7 +96,7 @@ your computer's performance.">
         or alternatively,<br/>
         Chrome with
         <span class="tt">
-          --no-sandbox --js-flags="--prof --noprof-lazy --log-timer-events
+          --no-sandbox --js-flags="--prof --log-timer-events"
         </span> to produce <span class="tt">v8.log</span>.
       </li>
       <li>
@@ -117,6 +117,11 @@ your computer's performance.">
           command-line utility
         </a> instead.
       </li>
+    </ol>
+    If you expect multiple V8 instances to run concurrently, for example
+    with several tabs in Chrome,<br/>
+    add the V8 flag <span class="tt">--logfile=v8.%p.log</span>
+    so that each instance writes to its own log file.
     </div>
   </div>
 

tools/profviz/profviz.js

@@ -42,15 +42,6 @@ var worker_scripts = [
 function plotWorker() {
   var worker = null;
 
-  var delegateList = {
-    "log"         : log,
-    "error"       : logError,
-    "displayplot" : displayplot,
-    "displayprof" : displayprof,
-    "range"       : setRange,
-    "script"      : scriptLoaded
-  }
-
   function initialize() {
     ui.freeze();
     worker = new Worker("worker.js");
@@ -89,6 +80,16 @@ function plotWorker() {
     if (worker) worker.terminate();
     initialize();
   }
+
+  var delegateList = {
+    "log"         : log,
+    "error"       : logError,
+    "displayplot" : displayplot,
+    "displayprof" : displayprof,
+    "range"       : setRange,
+    "script"      : scriptLoaded,
+    "reset"       : this.reset
+  }
 }
 
 
@@ -233,9 +234,6 @@ function start(event) {
 function getSelectedFile() {
   var file = ui.file.files[0];
   if (!file) throw Error("No valid file selected.");
-  if (!file.type.toString().match(/text/)) {
-    throw Error("'" + escape(file.name) + "' is not a text file.");
-  }
   return file;
 }
 

tools/profviz/stdio.js

@@ -44,7 +44,11 @@ if (!isNaN(range_end)) range_end_override = range_end;
 
 var kResX = 1600;
 var kResY = 600;
-var psc = new PlotScriptComposer(kResX, kResY);
+function log_error(text) {
+  print(text);
+  quit(1);
+}
+var psc = new PlotScriptComposer(kResX, kResY, log_error);
 psc.collectData(readline, distortion_per_entry);
 psc.findPlotRange(range_start_override, range_end_override);
 print("set terminal pngcairo size " + kResX + "," + kResY +

tools/profviz/worker.js

@@ -72,6 +72,12 @@ function load_scripts(scripts) {
 }
 
 
+function log_error(text) {
+  self.postMessage({"call": "error", "args": text});
+  self.postMessage({"call": "reset"});
+}
+
+
 function run(args) {
   var file = args["file"];
   var resx = args["resx"];
@@ -121,7 +127,7 @@ function run(args) {
   var input_file_name = "input_temp";
   var output_file_name = "output.svg";
 
-  var psc = new PlotScriptComposer(resx, resy);
+  var psc = new PlotScriptComposer(resx, resy, log_error);
   var objects = 0;
 
   time("Collecting events (" + content_lines.length + " entries)",