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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/TypedArray/set-same-buffer-different-source-target-types.js | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/set-same-buffer-different-source-target-types.js b/js/src/tests/non262/TypedArray/set-same-buffer-different-source-target-types.js new file mode 100644 index 0000000000..9084ce883a --- /dev/null +++ b/js/src/tests/non262/TypedArray/set-same-buffer-different-source-target-types.js @@ -0,0 +1,41 @@ +/* + * Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/publicdomain/zero/1.0/ + */ + +var gTestfile = "set-same-buffer-different-source-target-types.js"; +//----------------------------------------------------------------------------- +var BUGNUMBER = 896116; +var summary = + "When setting a typed array from an overlapping typed array of different " + + "element type, copy the source elements into properly-sized temporary " + + "memory, and properly copy them into the target without overflow (of " + + "either source *or* target) when finished"; + +print(BUGNUMBER + ": " + summary); + +/************** + * BEGIN TEST * + **************/ + +// smallest 2**n triggering segfaults in a pre-patch build locally, then +// quadrupled in case the boundary ever changes, or is different in some other +// memory-allocating implementation +var srclen = 65536; + +var ta = new Uint8Array(srclen * Float64Array.BYTES_PER_ELEMENT); +var ta2 = new Float64Array(ta.buffer, 0, srclen); +ta.set(ta2); + +// This test mostly exists to check for no crash above, but it's worth testing +// for no uninitialized memory (in case of buffer overflow) being copied into +// the array, too. +for (var i = 0, len = ta.length; i < len; i++) + assertEq(ta[i], 0, "zero-bits double should convert to zero"); + +/******************************************************************************/ + +if (typeof reportCompare === "function") + reportCompare(true, true); + +print("Tests complete"); |