tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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large-lengths-offsets.js (2187B)

      1 const gb = 1 * 1024 * 1024 * 1024;
      2 
      3 const bufferSmall = new ArrayBuffer(8);
      4 const bufferLarge = new ArrayBuffer(6 * gb);
      5 
      6 const taSmall = new Uint8Array(bufferSmall);
      7 const taLargeOffset = new Uint8Array(bufferLarge, 5 * gb);
      8 const taLargeLength = new Uint8Array(bufferLarge);
      9 
     10 const dvSmall = new DataView(bufferSmall);
     11 const dvLargeOffset = new DataView(bufferLarge, 5 * gb);
     12 const dvLargeLength = new DataView(bufferLarge);
     13 
     14 const TypedArrayLength = getSelfHostedValue("TypedArrayLength");
     15 
     16 function testBufferByteLengthInt32() {
     17    var arr = [bufferLarge, bufferSmall];
     18    for (var i = 0; i < 2000; i++) {
     19        var idx = +(i < 1900); // First 1 then 0.
     20        assertEq(arr[idx].byteLength, idx === 0 ? 6 * gb : 8);
     21    }
     22 }
     23 testBufferByteLengthInt32();
     24 
     25 function testTypedArrayByteOffsetInt32() {
     26    var arr = [taLargeOffset, taSmall];
     27    for (var i = 0; i < 2000; i++) {
     28        var idx = +(i < 1900); // First 1 then 0.
     29        assertEq(arr[idx].byteOffset, idx === 0 ? 5 * gb : 0);
     30    }
     31 }
     32 testTypedArrayByteOffsetInt32();
     33 
     34 function testTypedArrayLengthInt32() {
     35    var arr = [taLargeLength, taSmall];
     36    for (var i = 0; i < 2000; i++) {
     37        var idx = +(i < 1900); // First 1 then 0.
     38        assertEq(TypedArrayLength(arr[idx]), idx === 0 ? 6 * gb : 8);
     39        assertEq(arr[idx].length, idx === 0 ? 6 * gb : 8);
     40    }
     41 }
     42 testTypedArrayLengthInt32();
     43 
     44 function testTypedArrayByteLengthInt32() {
     45    var arr = [taLargeLength, taSmall];
     46    for (var i = 0; i < 2000; i++) {
     47        var idx = +(i < 1900); // First 1 then 0.
     48        assertEq(arr[idx].byteLength, idx === 0 ? 6 * gb : 8);
     49    }
     50 }
     51 testTypedArrayByteLengthInt32();
     52 
     53 function testDataViewByteOffsetInt32() {
     54    var arr = [dvLargeOffset, dvSmall];
     55    for (var i = 0; i < 2000; i++) {
     56        var idx = +(i < 1900); // First 1 then 0.
     57        assertEq(arr[idx].byteOffset, idx === 0 ? 5 * gb : 0);
     58    }
     59 }
     60 testDataViewByteOffsetInt32();
     61 
     62 function testDataViewByteLengthInt32() {
     63    var arr = [dvLargeLength, dvSmall];
     64    for (var i = 0; i < 2000; i++) {
     65        var idx = +(i < 1900); // First 1 then 0.
     66        assertEq(arr[idx].byteLength, idx === 0 ? 6 * gb : 8);
     67    }
     68 }
     69 testDataViewByteLengthInt32();