resizable-buffer-inlined-data-moved.js

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// |jit-test| --enable-arraybuffer-resizable; skip-if: !ArrayBuffer.prototype.resize

function fillArrayBuffer(rab) {

  let fill = new Int8Array(rab);

  for (let i = 0; i < fill.length; ++i) fill[i] = i + 1;

function test() {

  let rab = new ArrayBuffer(4, {maxByteLength: 4});

  let ta = new Int8Array(rab, 2, 2);

  fillArrayBuffer(rab);

  assertEq(ta[0], 3);

  assertEq(ta[1], 4);

  // Shrink to make |ta| out-of-bounds.

  rab.resize(3);

  // Request GC to move inline data.

  gc();

  // Grow to make |ta| in-bounds again.

  rab.resize(4);

  assertEq(ta[0], 3);

  assertEq(ta[1], 0);

test();

function testAutoLength() {

  let rab = new ArrayBuffer(4, {maxByteLength: 4});

  let ta = new Int8Array(rab, 2);

  fillArrayBuffer(rab);

  assertEq(ta[0], 3);

  assertEq(ta[1], 4);

  // Shrink to make |ta| out-of-bounds.

  rab.resize(1);

  // Request GC to move inline data.

  gc();

  // Grow to make |ta| in-bounds again.

  rab.resize(4);

  assertEq(ta[0], 0);

  assertEq(ta[1], 0);

testAutoLength();