tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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null-for-timeout-agent.js (3263B)

      1 // |reftest| shell-option(--setpref=atomics_wait_async) skip-if(!this.hasOwnProperty('SharedArrayBuffer')||!this.hasOwnProperty('Atomics')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))||!xulRuntime.shell) async -- SharedArrayBuffer,Atomics is not enabled unconditionally, ARM64 Simulator cannot emulate atomics, requires shell-options
      2 // Copyright (C) 2020 Rick Waldron. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 
      5 /*---
      6 esid: sec-atomics.waitasync
      7 description: >
      8  null timeout arg should result in an +0 timeout
      9 info: |
     10  Atomics.waitAsync( typedArray, index, value, timeout )
     11 
     12  1. Return DoWait(async, typedArray, index, value, timeout).
     13 
     14  DoWait ( mode, typedArray, index, value, timeout )
     15 
     16  6. Let q be ? ToNumber(timeout).
     17 
     18    Null -> Return +0.
     19 
     20 flags: [async]
     21 includes: [atomicsHelper.js]
     22 features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, arrow-function, async-functions]
     23 ---*/
     24 assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"');
     25 
     26 const RUNNING = 1;
     27 
     28 $262.agent.start(`
     29  const valueOf = {
     30    valueOf() {
     31      return null;
     32    }
     33  };
     34 
     35  const toPrimitive = {
     36    [Symbol.toPrimitive]() {
     37      return null;
     38    }
     39  };
     40 
     41  $262.agent.receiveBroadcast(async (sab) => {
     42    const i32a = new Int32Array(sab);
     43    Atomics.add(i32a, ${RUNNING}, 1);
     44    $262.agent.report(await Atomics.waitAsync(i32a, 0, 0, null).value);
     45    $262.agent.report(await Atomics.waitAsync(i32a, 0, 0, valueOf).value);
     46    $262.agent.report(await Atomics.waitAsync(i32a, 0, 0, toPrimitive).value);
     47    $262.agent.report(Atomics.waitAsync(i32a, 0, 0, null).value);
     48    $262.agent.report(Atomics.waitAsync(i32a, 0, 0, valueOf).value);
     49    $262.agent.report(Atomics.waitAsync(i32a, 0, 0, toPrimitive).value);
     50    $262.agent.leaving();
     51  });
     52 `);
     53 
     54 const i32a = new Int32Array(
     55  new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
     56 );
     57 
     58 $262.agent.safeBroadcastAsync(i32a, RUNNING, 1).then(async (agentCount) => {
     59  assert.sameValue(agentCount, 1, 'The value of `agentCount` is 1');
     60 
     61  assert.sameValue(
     62    await $262.agent.getReportAsync(),
     63    'timed-out',
     64    '(await $262.agent.getReportAsync()) resolves to the value "timed-out"'
     65  );
     66  assert.sameValue(
     67    await $262.agent.getReportAsync(),
     68    'timed-out',
     69    '(await $262.agent.getReportAsync()) resolves to the value "timed-out"'
     70  );
     71  assert.sameValue(
     72    await $262.agent.getReportAsync(),
     73    'timed-out',
     74    '(await $262.agent.getReportAsync()) resolves to the value "timed-out"'
     75  );
     76  assert.sameValue(
     77    await $262.agent.getReportAsync(),
     78    'timed-out',
     79    '(await $262.agent.getReportAsync()) resolves to the value "timed-out"'
     80  );
     81  assert.sameValue(
     82    await $262.agent.getReportAsync(),
     83    'timed-out',
     84    '(await $262.agent.getReportAsync()) resolves to the value "timed-out"'
     85  );
     86  assert.sameValue(
     87    await $262.agent.getReportAsync(),
     88    'timed-out',
     89    '(await $262.agent.getReportAsync()) resolves to the value "timed-out"'
     90  );
     91 
     92  assert.sameValue(Atomics.notify(i32a, 0), 0, 'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)), 0) must return 0');
     93 
     94 }).then($DONE, $DONE);