diff options
Diffstat (limited to 'js/src/jit-test/tests/sharedbuf/typedarray-from-sharedtypedarray-with-overridden-length.js')
-rw-r--r-- | js/src/jit-test/tests/sharedbuf/typedarray-from-sharedtypedarray-with-overridden-length.js | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/sharedbuf/typedarray-from-sharedtypedarray-with-overridden-length.js b/js/src/jit-test/tests/sharedbuf/typedarray-from-sharedtypedarray-with-overridden-length.js new file mode 100644 index 0000000000..100443495a --- /dev/null +++ b/js/src/jit-test/tests/sharedbuf/typedarray-from-sharedtypedarray-with-overridden-length.js @@ -0,0 +1,24 @@ +// |jit-test| skip-if: !this.SharedArrayBuffer + +// This would hit an assertion in debug builds due to an incorrect +// type guard in the code that copies data from STA to TA. + +// Original test case + +var sab = new SharedArrayBuffer(4); + +var x = new Int32Array(sab); +x.__proto__ = (function(){}); +new Uint8Array(x); // Would assert here + +// Supposedly equivalent test case, provoking the error directly + +var x = new Int32Array(sab); +Object.defineProperty(x, "length", { value: 0 }); +new Uint8Array(x); // Would assert here + +// Derived test case - would not tickle the bug, though. + +var x = new Int32Array(sab); +Object.defineProperty(x, "length", { value: 1 << 20 }); +new Uint8Array(x); |