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<!DOCTYPE html>
<!-- Copyright 2021 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. -->
<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>
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