canary_mac_crash.js

const { spawnChrome } = require("chrome-debugging-client");
const { sleep } = require("race-cancellation");
const fs = require("fs");

const DEVTOOLS_CATEGORIES = [
  "-*",
  "devtools.timeline",
  "viz",
  "benchmark",
  "blink",
  "cc",
  "gpu",
  "v8",
  "v8.execute",
  "disabled-by-default-devtools.timeline",
  "disabled-by-default-devtools.timeline.frame",
  "toplevel",
  "blink.console",
  "blink.user_timing",
  "latencyInfo",
  "disabled-by-default-v8.cpu_profiler",
  "disabled-by-default-v8.cpu_profiler",
  "disabled-by-default.cpu_profiler",
  "disabled-by-default.cpu_profiler.debug",
  "renderer",
  "cpu_profiler"
];

main().catch(e => {
  console.error("%o", e);
});

async function main() {
  const chrome = spawnChrome({
    stdio: "inherit",
    headless: true,
    additionalArguments: [
      "--enable-logging=stderr",
      "--v=1",
      `--crash-dump-dir=${__dirname}/tmp`,
      "--no-sandbox"
    ]
  });

  try {
    const browser = chrome.connection;

    const target = await browser.send("Target.createTarget", {
      url: "about:blank"
    });

    const page = await browser.attachToTarget(target);

    await Promise.all([
      page.send("Page.enable"),
      page.send("Runtime.enable"),
      page.send("Network.enable")
    ]);

    // CPU throttling causes the v8 sample to crash
    await page.send("Emulation.setCPUThrottlingRate", {
      rate: 2
    });

    await page.send("Tracing.start", {
      traceConfig: {
        includedCategories: DEVTOOLS_CATEGORIES
      }
    });

    await Promise.all([
      page.until("Page.loadEventFired"),
      page.send("Page.navigate", { url: "https://www.tracerbench.com" })
    ]);

    await sleep(1000);

    const events = [];
    page.on("Tracing.dataCollected", event => {
      events.push(...event.value);
    });

    await Promise.all([
      page.until("Tracing.tracingComplete"),
      page.send("Tracing.end", {
        traceConfig: {
          includedCategories: DEVTOOLS_CATEGORIES
        }
      })
    ]);

    fs.writeFileSync("trace.json", JSON.stringify(events, null, 2));

    await chrome.close();
  } finally {
    await chrome.dispose();
  }
}