1 files changed, 81 insertions, 0 deletions
diff --git a/test/sequential/test-inspector-async-hook-setup-at-signal.js b/test/sequential/test-inspector-async-hook-setup-at-signal.js
new file mode 100644
index 0000000000..96e8b28a7a
--- /dev/null
+++ b/test/sequential/test-inspector-async-hook-setup-at-signal.js
@@ -0,0 +1,81 @@
+'use strict';
+const common = require('../common');
+common.skipIfInspectorDisabled();
+common.skipIf32Bits();
+common.crashOnUnhandledRejection();
+const { NodeInstance } = require('../common/inspector-helper.js');
+const assert = require('assert');
+
+const script = `
+process._rawDebug('Waiting until a signal enables the inspector...');
+let waiting = setInterval(waitUntilDebugged, 50);
+
+function waitUntilDebugged() {
+  if (!process.binding('inspector').isEnabled()) return;
+  clearInterval(waiting);
+  // At this point, even though the Inspector is enabled, the default async
+  // call stack depth is 0. We need a chance to call
+  // Debugger.setAsyncCallStackDepth *before* activating the actual timer for
+  // async stack traces to work. Directly using a debugger statement would be
+  // too brittle, and using a longer timeout would unnecesarily slow down the
+  // test on most machines. Triggering a debugger break through an interval is
+  // a faster and more reliable way.
+  process._rawDebug('Signal received, waiting for debugger setup');
+  waiting = setInterval(() => { debugger; }, 50);
+}
+
+// This function is called by the inspector client (session)
+function setupTimeoutWithBreak() {
+  clearInterval(waiting);
+  process._rawDebug('Debugger ready, setting up timeout with a break');
+  setTimeout(() => { debugger; }, 50);
+}
+`;
+
+async function waitForInitialSetup(session) {
+  console.error('[test]', 'Waiting for initial setup');
+  await session.waitForBreakOnLine(15, '[eval]');
+}
+
+async function setupTimeoutForStackTrace(session) {
+  console.error('[test]', 'Setting up timeout for async stack trace');
+  await session.send([
+    { 'method': 'Runtime.evaluate',
+      'params': { expression: 'setupTimeoutWithBreak()' } },
+    { 'method': 'Debugger.resume' }
+  ]);
+}
+
+async function checkAsyncStackTrace(session) {
+  console.error('[test]', 'Verify basic properties of asyncStackTrace');
+  const paused = await session.waitForBreakOnLine(22, '[eval]');
+  assert(paused.params.asyncStackTrace,
+         `${Object.keys(paused.params)} contains "asyncStackTrace" property`);
+  assert(paused.params.asyncStackTrace.description, 'Timeout');
+  assert(paused.params.asyncStackTrace.callFrames
+           .some((frame) => frame.functionName === 'setupTimeoutWithBreak'));
+}
+
+async function runTests() {
+  const instance = await NodeInstance.startViaSignal(script);
+  const session = await instance.connectInspectorSession();
+  await session.send([
+    { 'method': 'Runtime.enable' },
+    { 'method': 'Debugger.enable' },
+    { 'method': 'Debugger.setAsyncCallStackDepth',
+      'params': { 'maxDepth': 10 } },
+    { 'method': 'Debugger.setBlackboxPatterns',
+      'params': { 'patterns': [] } },
+    { 'method': 'Runtime.runIfWaitingForDebugger' }
+  ]);
+
+  await waitForInitialSetup(session);
+  await setupTimeoutForStackTrace(session);
+  await checkAsyncStackTrace(session);
+
+  console.error('[test]', 'Stopping child instance');
+  session.disconnect();
+  instance.kill();
+}
+
+runTests();