feat(desktop): Add Export Logs (#26262)

packages/desktop/src/main/unresponsive.ts

@@ -0,0 +1,69 @@
+import type { BrowserWindow } from "electron"
+import { write as writeLog } from "./logging"
+
+const sampleInterval = 1000
+const samplePeriod = 15000
+
+export function createUnresponsiveSampler(win: BrowserWindow, name: string) {
+  let sampleTimer: ReturnType<typeof setTimeout> | undefined
+  let stopTimer: ReturnType<typeof setTimeout> | undefined
+  let sampling = false
+  const samples = new Map<string, number>()
+
+  const active = () => sampling && !win.isDestroyed() && !win.webContents.isDestroyed()
+  const clearTimers = () => {
+    if (sampleTimer) clearTimeout(sampleTimer)
+    if (stopTimer) clearTimeout(stopTimer)
+    sampleTimer = undefined
+    stopTimer = undefined
+  }
+
+  const schedule = () => {
+    sampleTimer = setTimeout(() => {
+      void collect()
+    }, sampleInterval)
+  }
+
+  const collect = async () => {
+    if (!active()) return
+    const stack = await win.webContents.mainFrame.collectJavaScriptCallStack().catch((error) => {
+      writeLog("window", "failed to collect unresponsive sample", { window: name, error }, "error")
+      return undefined
+    })
+    if (!active()) return
+    if (stack) samples.set(stack, (samples.get(stack) ?? 0) + 1)
+    schedule()
+  }
+
+  const stopAndFlush = () => {
+    const wasSampling = sampling
+    sampling = false
+    clearTimers()
+    if (samples.size === 0) return wasSampling
+
+    const entries = [...samples.entries()].sort((a, b) => b[1] - a[1])
+    const total = entries.reduce((sum, entry) => sum + entry[1], 0)
+    const message = [
+      "renderer unresponsive samples",
+      `Window: ${name}`,
+      `URL: ${win.isDestroyed() ? "<destroyed>" : win.webContents.getURL()}`,
+      ...entries.map((entry) => `<${entry[1]}> ${entry[0]}`),
+      `Total Samples: ${total}`,
+    ].join("\n")
+    writeLog("window", message, undefined, "error")
+    samples.clear()
+    return wasSampling
+  }
+
+  const start = () => {
+    if (sampling || win.isDestroyed() || win.webContents.isDestroyed() || win.webContents.isDevToolsOpened()) return
+    sampling = true
+    samples.clear()
+    schedule()
+    stopTimer = setTimeout(stopAndFlush, samplePeriod)
+  }
+
+  win.on("closed", stopAndFlush)
+
+  return { start, stopAndFlush }
+}