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Fix push() and unshift() in case result length is larger than UINT_MAX #462
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| // Copyright 2015 Samsung Electronics Co., Ltd. | ||
| // Copyright 2015 University of Szeged. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| var len; | ||
| var d = []; | ||
| assert (d.length === 0); | ||
| len = d.push(); | ||
| assert (d.length === 0); | ||
| assert (d.length === len); | ||
| len = d.push(1); | ||
| assert (d.length === 1); | ||
| assert (d.length === len); | ||
| len = d.push(2); | ||
| assert (d.length === 2); | ||
| assert (d.length === len); | ||
| len = d.push('a'); | ||
| assert (d.length === 3); | ||
| assert (d.length === len); | ||
| len = d.push('b', 'c', 3); | ||
| assert (d.length == 6); | ||
| assert (d.length === len); | ||
| assert (d[0] === 1); | ||
| assert (d[1] === 2); | ||
| assert (d[2] === 'a'); | ||
| assert (d[3] === 'b'); | ||
| assert (d[4] === 'c'); | ||
| assert (d[5] === 3); | ||
|
|
||
| var a = []; | ||
| a.length = 4294967294; | ||
| assert(a.push("x") === 4294967295); | ||
| assert(a.length === 4294967295); | ||
| assert(a[4294967294] === "x"); | ||
|
|
||
| try { | ||
| a.push("y"); | ||
| assert(false); | ||
| } catch (e) { | ||
| assert (e instanceof RangeError); | ||
| } | ||
| assert(a.length === 4294967295) | ||
|
|
||
|
|
||
| var o = { length : 4294967294, push : Array.prototype.push }; | ||
| assert(o.push("x") === 4294967295); | ||
| assert(o.length === 4294967295); | ||
| assert(o[4294967294] === "x"); | ||
|
|
||
| try { | ||
| assert(o.push("y") === 4294967296); | ||
| } catch (e) { | ||
| assert(false); | ||
| } | ||
| assert(o.length === 4294967296); | ||
| assert(o[4294967295] === "y"); | ||
|
|
||
| try { | ||
| assert(o.push("z") === 1); | ||
| } catch (e) { | ||
| assert(false); | ||
| } | ||
| assert(o.length === 1); | ||
| assert(o[0] === "z"); |
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It is better to use
ecma_new_ecma_string_from_uint32instead ofecma_new_ecma_string_from_number, as it reduces memory usage.There was a problem hiding this comment.
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We can't use
ecma_new_ecma_string_from_uint32here, because the index can go above 2^32.There was a problem hiding this comment.
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I see. Thanks for explanation.