[mjsunit][tools] Add processor.mjs test

Add simple log file test with processor.mjs, mostly focusing on parsing
the log file correctly.

Change-Id: Ie8db569b65ecd526ef4474a64d4019f00707d159
Bug: v8:10668
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2484515
Commit-Queue: Dan Elphick <delphick@chromium.org>
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70806}

test/mjsunit/BUILD.gn

@@ -13,20 +13,25 @@ group("v8_mjsunit") {
   data = [
     "./",
     "../../tools/arguments.js",
+    "../../tools/arguments.mjs",
     "../../tools/clusterfuzz/v8_mock.js",
     "../../tools/clusterfuzz/v8_mock_archs.js",
     "../../tools/clusterfuzz/v8_mock_webassembly.js",
     "../../tools/codemap.mjs",
     "../../tools/consarray.mjs",
     "../../tools/csvparser.mjs",
+    "../../tools/dumpcpp.mjs",
     "../../tools/logreader.mjs",
-    "../../tools/arguments.mjs",
     "../../tools/profile.mjs",
     "../../tools/profile_view.mjs",
     "../../tools/splaytree.mjs",
-    "../../tools/tickprocessor.mjs",
+    "../../tools/system-analyzer/helper.mjs",
+    "../../tools/system-analyzer/log/deopt.mjs",
+    "../../tools/system-analyzer/log/ic.mjs",
     "../../tools/system-analyzer/log/log.mjs",
+    "../../tools/system-analyzer/log/map.mjs",
+    "../../tools/system-analyzer/processor.mjs",
     "../../tools/system-analyzer/timeline.mjs",
-    "../../tools/dumpcpp.mjs",
+    "../../tools/tickprocessor.mjs",
   ]
 }

test/mjsunit/tools/processor.mjs

+// Copyright 2020 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.
+
+// Flags: --logfile='+' --log --trace-maps --trace-ic --log-code
+// Flags: --log-function-events --no-stress-opt
+
+import { Processor } from "../../../tools/system-analyzer/processor.mjs";
+
+// log code start
+function doWork() {
+  let array = [];
+  for (let i = 0; i < 500; i++) {
+    doWorkStep(i, array);
+  }
+  let sum = 0;
+  for (let i = 0; i < 500; i++) {
+    sum += array[i]["property" + i];
+  }
+  return sum;
+}
+
+function doWorkStep(i, array) {
+  const obj = {
+    ["property" + i]: i,
+  };
+  array.push(obj);
+  obj.custom1 = 1;
+  obj.custom2 = 2;
+}
+
+const result = doWork();
+ // log code end
+
+const logString = d8.log.getAndStop();
+const processor = new Processor();
+processor.processString(logString);
+
+const maps = processor.mapTimeline;
+const ics = processor.icTimeline;
+const scripts = processor.scripts;
+
+(function testResults() {
+  assertEquals(result, 124750);
+  assertTrue(maps.length > 0);
+  assertTrue(ics.length > 0);
+  assertTrue(scripts.length > 0);
+})();
+
+(function testIcKeys() {
+  const keys = new Set();
+  ics.forEach(ic => keys.add(ic.key));
+  assertTrue(keys.has("custom1"));
+  assertTrue(keys.has("custom2"));
+  assertTrue(keys.has("push"));
+})();

tools/system-analyzer/timeline.mjs

@@ -91,6 +91,10 @@ class Timeline {
     return this._values.length;
   }
 
+  get length() {
+    return this._values.length;
+  }
+
   first() {
     return this._values[0];
   }