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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /js/src/jit-test/tests/TypedObject/neutertypedobjunsizedarray.js | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'js/src/jit-test/tests/TypedObject/neutertypedobjunsizedarray.js')
-rw-r--r-- | js/src/jit-test/tests/TypedObject/neutertypedobjunsizedarray.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/TypedObject/neutertypedobjunsizedarray.js b/js/src/jit-test/tests/TypedObject/neutertypedobjunsizedarray.js new file mode 100644 index 000000000..c1c248d72 --- /dev/null +++ b/js/src/jit-test/tests/TypedObject/neutertypedobjunsizedarray.js @@ -0,0 +1,38 @@ +// Test the case where we detach the buffer underlying a variable-length array. +// Here we can fold the detached check into the bounds check. + +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(); |