tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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undefined-index-defaults-to-zero-agent.js (2883B)

      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 esid: sec-atomics.waitasync
      6 description: >
      7  Undefined index arg is coerced to zero
      8 info: |
      9  Atomics.waitAsync( typedArray, index, value, timeout )
     10 
     11  1. Return DoWait(async, typedArray, index, value, timeout).
     12 
     13  DoWait ( mode, typedArray, index, value, timeout )
     14 
     15  2. Let i be ? ValidateAtomicAccess(typedArray, index).
     16      ...
     17      2.Let accessIndex be ? ToIndex(requestIndex).
     18 
     19      9.If IsSharedArrayBuffer(buffer) is false, throw a TypeError exception.
     20        ...
     21          3.If bufferData is a Data Block, return false
     22 
     23          If value is undefined, then
     24          Let index be 0.
     25 
     26 flags: [async]
     27 includes: [atomicsHelper.js]
     28 features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, BigInt, arrow-function, async-functions]
     29 ---*/
     30 assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"');
     31 
     32 const WAIT_INDEX = 0;
     33 const RUNNING = 1;
     34 const NUMAGENT = 2;
     35 const NOTIFYCOUNT = 2;
     36 
     37 $262.agent.start(`
     38  $262.agent.receiveBroadcast(async (sab) => {
     39    var i64a = new BigInt64Array(sab);
     40    Atomics.add(i64a, ${RUNNING}, 1n);
     41 
     42    $262.agent.report("A " + (await Atomics.waitAsync(i64a, undefined, 0n).value));
     43    $262.agent.leaving();
     44  });
     45 `);
     46 
     47 $262.agent.start(`
     48  $262.agent.receiveBroadcast(async (sab) => {
     49    var i64a = new BigInt64Array(sab);
     50    Atomics.add(i64a, ${RUNNING}, 1n);
     51 
     52    $262.agent.report("B " + (await Atomics.waitAsync(i64a, undefined, 0n).value));
     53    $262.agent.leaving();
     54  });
     55 `);
     56 
     57 const i64a = new BigInt64Array(
     58  new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)
     59 );
     60 
     61 $262.agent.safeBroadcastAsync(i64a, RUNNING, BigInt(NUMAGENT)).then(async (agentCount) => {
     62 
     63  assert.sameValue(
     64    agentCount,
     65    BigInt(NUMAGENT),
     66    'The value of `agentCount` must return the same value returned by BigInt(NUMAGENT)'
     67  );
     68 
     69  assert.sameValue(
     70    Atomics.notify(i64a, WAIT_INDEX, NOTIFYCOUNT),
     71    NOTIFYCOUNT,
     72    'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)), 0, 2) must return the value of NOTIFYCOUNT'
     73  );
     74 
     75  const reports = [
     76    await $262.agent.getReportAsync(),
     77    await $262.agent.getReportAsync(),
     78  ];
     79 
     80  reports.sort();
     81  assert.sameValue(reports[0], 'A ok', 'The value of reports[0] is "A ok"');
     82  assert.sameValue(reports[1], 'B ok', 'The value of reports[1] is "B ok"');
     83 }).then($DONE, $DONE);