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Diffstat (limited to 'js/src/jit-test/tests/TypedObject/neutertypedobjsizedarray.js')
-rw-r--r-- | js/src/jit-test/tests/TypedObject/neutertypedobjsizedarray.js | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/TypedObject/neutertypedobjsizedarray.js b/js/src/jit-test/tests/TypedObject/neutertypedobjsizedarray.js new file mode 100644 index 000000000..6f8522906 --- /dev/null +++ b/js/src/jit-test/tests/TypedObject/neutertypedobjsizedarray.js @@ -0,0 +1,40 @@ +// Test the case where we detach the buffer underlying a fixed-sized array. +// This is a bit of a tricky case because we cannot (necessarily) fold +// the detached check into the bounds check, as we obtain the bounds +// directly from the type. + +if (!this.hasOwnProperty("TypedObject")) + quit(); + +var {StructType, uint32, storage} = TypedObject; +var S = new StructType({f: uint32, g: uint32}); +var A = S.array(10); + +function readFrom(a) { + return a[2].f + a[2].g; +} + +function main() { + var a = new A(); + a[2].f = 22; + a[2].g = 44; + + for (var i = 0; i < 10; i++) + assertEq(readFrom(a), 66); + + detachArrayBuffer(storage(a).buffer); + + for (var i = 0; i < 10; i++) { + var ok = false; + + try { + readFrom(a); + } catch (e) { + ok = e instanceof TypeError; + } + + assertEq(ok, true); + } +} + +main(); |