rbyers.github.io/AgentRegistryCrash.html at master · RByers/rbyers.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Blink AgentRegistry Continuous Stress Test (IPC / GC)</title>
    <style>
        body {
            font-family: system-ui, -apple-system, sans-serif;
            margin: 25px;
            background-color: #f1f5f9;
            color: #0f172a;
        }
        h1 {
            font-size: 26px;
            margin-bottom: 10px;
            color: #1e293b;
        }
        p {
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .dashboard {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-bottom: 25px;
        }
        .card {
            background: #fff;
            padding: 22px;
            border-radius: 10px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
            border-top: 4px solid #3b82f6;
        }
        .card h2 {
            font-size: 19px;
            margin-top: 0;
            margin-bottom: 15px;
            color: #1d4ed8;
        }
        button {
            background-color: #3b82f6;
            color: white;
            border: none;
            padding: 12px 24px;
            font-size: 16px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: background-color 0.2s;
        }
        button:hover {
            background-color: #2563eb;
        }
        button.danger {
            background-color: #ef4444;
            border-top-color: #dc2626;
        }
        button.danger:hover {
            background-color: #dc2626;
        }
        #iframe-sandbox {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
            padding: 20px;
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
            min-height: 300px;
            border: 1px solid #cbd5e1;
        }
        iframe {
            width: 120px;
            height: 90px;
            border: 1px solid #94a3b8;
            border-radius: 6px;
            background: #f8fafc;
        }
        #status {
            font-weight: bold;
            color: #10b981;
        }
        .busy {
            color: #ef4444 !important;
        }
        ul {
            margin: 0;
            padding-left: 20px;
        }
        li {
            margin-bottom: 8px;
        }
    </style>
</head>
<body>

    <h1>Blink AgentRegistry Continuous Stress Test (IPC / GC)</h1>
    <p>
        This reproducer is a <strong>continuous, high-frequency stress test</strong> designed to trigger the
        nested IPC message loop / GC reclamation Use-after-Free crash. It constantly mounts and unmounts
        30 cross-origin iframes (OOPIFs) inside active engine probes while simultaneously firing synchronous XHRs
        (spinning Mojo IPC loops) and forcing massive GC sweeps.
        <br><br>
        <strong>To reproduce the crash:</strong> Open Chrome DevTools (F12) to ensure `InspectorLogAgent` is active,
        launch Chrome with <code>--js-flags="--expose-gc"</code>, then click "Start Continuous Stress Test".
    </p>

    <div class="dashboard">
        <div class="card">
            <h2>Control Panel</h2>
            <button id="toggle-btn" onclick="toggleStressTest()">Start Continuous Stress Test</button>
            <p style="margin-top: 18px;">Status: <span id="status">IDLE</span></p>
            <p>Iframe Lifecycle Ops: <span id="ops-counter">0</span></p>
            <p>Allocated Garbage: <span id="garbage-counter">0</span> MB</p>
        </div>
        <div class="card" style="border-top-color: #ef4444;">
            <h2>Active Stress Mechanisms</h2>
            <ul>
                <li>30 Concurrent OOPIF Local Roots</li>
                <li>High-Frequency Iframe Detachment</li>
                <li>Synchronous XHR IPC Thrashing</li>
                <li>Continuous Layout & Style Thrashing</li>
                <li>Aggressive Heap Allocation & <code>window.gc()</code></li>
            </ul>
        </div>
    </div>

    <h2>Dynamic OOPIF Sandbox</h2>
    <div id="iframe-sandbox"></div>

    <script>
        let isRunning = false;
        let opsCount = 0;
        let totalGarbageMB = 0;
        const sandbox = document.getElementById('iframe-sandbox');
        const statusEl = document.getElementById('status');
        const opsEl = document.getElementById('ops-counter');
        const garbageEl = document.getElementById('garbage-counter');
        const toggleBtn = document.getElementById('toggle-btn');

        // List of cross-origin URLs to enforce Out-of-Process Iframe (OOPIF) local root creation
        const oopifUrls = [
            'https://example.com',
            'https://example.org',
            'https://example.net',
            'data:text/html,<h1>OOPIF Sandbox</h1>'
        ];

        function toggleStressTest() {
            isRunning = !isRunning;
            if (isRunning) {
                statusEl.textContent = 'CONTINUOUS STRESSING...';
                statusEl.className = 'busy';
                toggleBtn.textContent = 'Stop Continuous Stress Test';
                toggleBtn.className = 'danger';
                startStressLoops();
            } else {
                statusEl.textContent = 'IDLE';
                statusEl.className = '';
                toggleBtn.textContent = 'Start Continuous Stress Test';
                toggleBtn.className = '';
                sandbox.innerHTML = '';
            }
        }

        function startStressLoops() {
            if (!isRunning) return;

            // 1. Maintain a pool of 30 OOPIF local roots
            maintainIframePool();

            // 2. Force Layout Thrashing (triggers UpdateLayout & RecalculateStyle probes)
            forceLayoutThrashing();

            // 3. Trigger Microtask Re-entrancy
            queueMicrotask(() => {
                if (!isRunning) return;
                thrashIframesAndIpc();
            });

            requestAnimationFrame(startStressLoops);
        }

        // 1. Maintain Iframe Pool
        function maintainIframePool() {
            // Unmount a batch of existing iframes
            const iframes = sandbox.querySelectorAll('iframe');
            for (let i = 0; i < Math.min(iframes.length, 10); i++) {
                iframes[i].remove();
                opsCount++;
            }

            // Mount new cross-origin iframes
            while (sandbox.children.length < 30) {
                const iframe = document.createElement('iframe');
                iframe.src = oopifUrls[Math.floor(Math.random() * oopifUrls.length)];

                // Attach load and error listeners to trigger CallFunction probes during lifecycle changes
                iframe.onload = () => { if (isRunning && Math.random() < 0.5) thrashIframesAndIpc(); };
                iframe.onerror = () => { if (isRunning && Math.random() < 0.5) thrashIframesAndIpc(); };

                sandbox.appendChild(iframe);
                opsCount++;
            }
        }

        // 2. Layout Thrashing
        function forceLayoutThrashing() {
            sandbox.style.width = (Math.random() * 15 + 85) + '%';
            const forceReflow = sandbox.offsetWidth;
            sandbox.style.backgroundColor = Math.random() < 0.5 ? '#fff' : '#f8fafc';
        }

        // 3. The Ultimate Core Mechanism: Detach + Sync XHR IPC + Massive GC
        function thrashIframesAndIpc() {
            if (!isRunning) return;

            // Step A: Unmount random iframes inside an IIFE so local JS stack variables pop
            (() => {
                const iframes = sandbox.querySelectorAll('iframe');
                if (iframes.length > 0) {
                    iframes[Math.floor(Math.random() * iframes.length)].remove();
                    opsCount++;
                }
            })();

            // Step B: Aggressively allocate heap memory to force V8/Oilpan GC marking
            allocateGarbage();

            // Step C: Explicitly invoke V8 Garbage Collector if exposed via --js-flags="--expose-gc"
            if (typeof window.gc === 'function') {
                window.gc();
            }

            // Step D: Execute a synchronous XHR to spin a nested Mojo IPC message loop
            // While this synchronous network request blocks, the engine idles inside a nested message loop,
            // allowing Oilpan to sweep and destroy the detached CoreProbeSink before the outer probe destructor runs.
            try {
                const xhr = new XMLHttpRequest();
                xhr.open('GET', location.href, false); // Synchronous request
                xhr.send();
            } catch (e) {
                // Ignore network errors
            }
        }

        function allocateGarbage() {
            const garbageChunk = new Array(50000).fill('BLINK_AGENT_REGISTRY_CONTINUOUS_STRESS_TEST_GARBAGE_DATA');
            const serialized = JSON.stringify(garbageChunk);
            totalGarbageMB += Math.round((serialized.length * 2) / (1024 * 1024));
            garbageEl.textContent = totalGarbageMB;
        }

        // High-frequency background interval loops
        setInterval(() => {
            if (!isRunning) return;
            thrashIframesAndIpc();
        }, 10);

        setInterval(() => {
            if (!isRunning) return;
            maintainIframePool();
        }, 25);

        // Ops Counter Display Update
        setInterval(() => {
            if (!isRunning) return;
            opsEl.textContent = opsCount;
        }, 1000);
    </script>
</body>
</html>