index.html

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<!-- Copyright 2021 the V8 project authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
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<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>V8 Heap Layout</title>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/echarts/5.2.2/echarts.min.js"></script>

  <script type="module" src="heap-layout-viewer.mjs"></script>
  <script type="module" src="heap-size-trend-viewer.mjs"></script>
  <script type="module" src="trace-file-reader.mjs"></script>

  <link rel="stylesheet" type="text/css" href="./index.css">

  <script>
    'use strict';
    function $(id) { return document.querySelector(id); }

    function globalDataChanged(e) {
      $('#heap-layout-viewer').data = e.detail;
      $('#heap-size-trend-viewer').data = e.detail;
      $('.button-container').style.display = 'block';
    }

    function selectSnapshotAtIndex(e) {
      const index = e.detail;
      $('#heap-layout-viewer').drawChart(index);
    }


    function OnPrevClick() {
      const heap_size_trend_viewer = $('#heap-size-trend-viewer');
      const heap_layout_viewer = $('#heap-layout-viewer');
      heap_size_trend_viewer.setXMarkLine(heap_size_trend_viewer.currentIndex - 1);
      heap_layout_viewer.drawChart(heap_layout_viewer.currentIndex - 1);
    }

    function OnNextClick() {
      const heap_size_trend_viewer = $('#heap-size-trend-viewer');
      const heap_layout_viewer = $('#heap-layout-viewer');
      heap_size_trend_viewer.setXMarkLine(heap_size_trend_viewer.currentIndex + 1);
      heap_layout_viewer.drawChart(heap_layout_viewer.currentIndex + 1);
    }

  </script>
</head>

<body>
  <h1>V8 Heap Layout</h1>
  <trace-file-reader onchange="globalDataChanged(event)"></trace-file-reader>
  <heap-size-trend-viewer id="heap-size-trend-viewer" onchange="selectSnapshotAtIndex(event)"></heap-size-trend-viewer>
  <heap-layout-viewer id="heap-layout-viewer"></heap-layout-viewer>
  <div class="button-container">
    <button id="button_prev" type="button" onclick="OnPrevClick()">Prev</button>
    <button id="button_next" type="button" onclick="OnNextClick()">Next</button>
  </div>

  <p>Heap layout is a HTML-based tool for visualizing V8-internal heap layout.</p>
  <p>Visualize heap layout that have been gathered using</p>
  <ul>
    <li><code>--trace-gc-heap-layout</code> on V8</li>

  </ul>

</body>

</html>