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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/xpconnect/tests/unit/head_watchdog.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/xpconnect/tests/unit/head_watchdog.js | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/head_watchdog.js b/js/xpconnect/tests/unit/head_watchdog.js new file mode 100644 index 0000000000..f977c1f129 --- /dev/null +++ b/js/xpconnect/tests/unit/head_watchdog.js @@ -0,0 +1,116 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// +// Pref management. +// + +var {PromiseTestUtils} = ChromeUtils.importESModule("resource://testing-common/PromiseTestUtils.sys.mjs"); + +/////////////////// +// +// Whitelisting these tests. +// As part of bug 1077403, the shutdown crash should be fixed. +// +// These tests may crash intermittently on shutdown if the DOM Promise uncaught +// rejection observers are still registered when the watchdog operates. +PromiseTestUtils.thisTestLeaksUncaughtRejectionsAndShouldBeFixed(); + +var gPrefs = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch); + +function setWatchdogEnabled(enabled) { + gPrefs.setBoolPref("dom.use_watchdog", enabled); +} + +function isWatchdogEnabled() { + return gPrefs.getBoolPref("dom.use_watchdog"); +} + +function setScriptTimeout(seconds) { + var oldTimeout = gPrefs.getIntPref("dom.max_script_run_time"); + gPrefs.setIntPref("dom.max_script_run_time", seconds); + return oldTimeout; +} + +// +// Utilities. +// + +function busyWait(ms) { + var start = new Date(); + while ((new Date()) - start < ms) {} +} + +function do_log_info(aMessage) +{ + print("TEST-INFO | " + _TEST_FILE + " | " + aMessage); +} + +// We don't use do_execute_soon, because that inserts a +// do_test_{pending,finished} pair that gets screwed up when we terminate scripts +// from the operation callback. +function executeSoon(fn) { + var tm = Cc["@mozilla.org/thread-manager;1"].getService(Ci.nsIThreadManager); + tm.dispatchToMainThread({run: fn}); +} + +// +// Asynchronous watchdog diagnostics. +// +// When running, the watchdog wakes up every second, and fires the operation +// callback if the script has been running for >= the minimum script timeout. +// As such, if the script timeout is 1 second, a script should never be able to +// run for two seconds or longer without servicing the operation callback. +// We wait 3 seconds, just to be safe. +// + +function checkWatchdog(expectInterrupt) { + var oldTimeout = setScriptTimeout(1); + var lastWatchdogWakeup = Cu.getWatchdogTimestamp("WatchdogWakeup"); + + return new Promise(resolve => { + let inBusyWait = false; + setInterruptCallback(function() { + // If the watchdog didn't actually trigger the operation callback, ignore + // this call. This allows us to test the actual watchdog behavior without + // interference from other sites where we trigger the operation callback. + if (lastWatchdogWakeup == Cu.getWatchdogTimestamp("WatchdogWakeup")) { + return true; + } + if (!inBusyWait) { + Assert.ok(true, "Not in busy wait, ignoring interrupt callback"); + return true; + } + + Assert.ok(expectInterrupt, "Interrupt callback fired"); + setInterruptCallback(undefined); + setScriptTimeout(oldTimeout); + // Schedule the promise for resolution before we kill this script. + executeSoon(resolve); + return false; + }); + + executeSoon(function() { + inBusyWait = true; + busyWait(3000); + inBusyWait = false; + Assert.ok(!expectInterrupt, "Interrupt callback didn't fire"); + setInterruptCallback(undefined); + setScriptTimeout(oldTimeout); + resolve(); + }); + }); +} + +function run_test() { + + // Run async. + do_test_pending(); + + // Run the async function. + testBody().then(() => { + do_test_finished(); + }); +} + |