no-spurious-wakeup-no-operation.js (1945B)
1 // |reftest| skip-if(!this.hasOwnProperty('Atomics')||!this.hasOwnProperty('SharedArrayBuffer')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))) -- Atomics,SharedArrayBuffer is not enabled unconditionally, ARM64 Simulator cannot emulate atomics 2 // Copyright (C) 2017 Mozilla Corporation. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 5 /*--- 6 esid: sec-atomics.wait 7 description: > 8 Test that Atomics.wait returns the right result when it timed out and that 9 the time to time out is reasonable. 10 info: | 11 17. Let awoken be Suspend(WL, W, t). 12 18. If awoken is true, then 13 a. Assert: W is not on the list of waiters in WL. 14 19. Else, 15 a.Perform RemoveWaiter(WL, W). 16 includes: [atomicsHelper.js] 17 features: [Atomics, SharedArrayBuffer, TypedArray] 18 ---*/ 19 20 const RUNNING = 1; 21 const TIMEOUT = $262.agent.timeouts.small; 22 23 const i32a = new Int32Array( 24 new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4) 25 ); 26 27 $262.agent.start(` 28 $262.agent.receiveBroadcast(function(sab) { 29 const i32a = new Int32Array(sab); 30 Atomics.add(i32a, ${RUNNING}, 1); 31 32 const before = $262.agent.monotonicNow(); 33 const unpark = Atomics.wait(i32a, 0, 0, ${TIMEOUT}); 34 const duration = $262.agent.monotonicNow() - before; 35 36 $262.agent.report(duration); 37 $262.agent.report(unpark); 38 $262.agent.leaving(); 39 }); 40 `); 41 42 $262.agent.safeBroadcast(i32a); 43 $262.agent.waitUntil(i32a, RUNNING, 1); 44 45 // Try to yield control to ensure the agent actually started to wait. 46 $262.agent.tryYield(); 47 48 // NO OPERATION OCCURS HERE! 49 50 const lapse = $262.agent.getReport(); 51 assert( 52 lapse >= TIMEOUT, 53 'The result of `(lapse >= TIMEOUT)` is true' 54 ); 55 assert.sameValue( 56 $262.agent.getReport(), 57 'timed-out', 58 '$262.agent.getReport() returns "timed-out"' 59 ); 60 assert.sameValue(Atomics.notify(i32a, 0), 0, 'Atomics.notify(i32a, 0) returns 0'); 61 62 reportCompare(0, 0);