Fix TypedArray initialization with another TypedArray (#3850)

Fixes #3836 JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
2020-06-08 10:28:42 +02:00
parent 1230d4532c
commit 90fd881fda
3 changed files with 71 additions and 8 deletions
@@ -0,0 +1,56 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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.
+
+function validate_typedarray (typedarray, result) {
+  assert(typedarray.length === result.length);
+  for (var i = 0; i < typedarray.length; i++) {
+    assert(typedarray[i] === result[i]);
+  }
+}
+
+var v1 = new Float64Array(6);
+v1.buffer.constructor = Uint8Array;
+var v2 = new Float64Array(v1);
+
+assert(v2.buffer.constructor === Uint8Array);
+validate_typedarray(v2, [0, 0, 0, 0, 0, 0]);
+
+var v3 = new Uint32Array(6);
+v3.buffer.constructor = Float64Array;
+var v4 = new Uint8Array(v3);
+
+assert(v4.buffer.constructor === Float64Array);
+validate_typedarray(v4, [0, 0, 0, 0, 0, 0]);
+
+var v5 = new Uint32Array(6);
+v5.buffer.constructor = Set;
+var v6 = new Uint8Array(v5);
+
+assert(v6.buffer.constructor === Set);
+validate_typedarray(v6, [0, 0, 0, 0, 0, 0]);
+
+var species_called = false;
+
+var v7 = new Float64Array(6);
+var v8 = v7.buffer;
+v8.constructor = {
+  get [Symbol.species] (){
+    species_called = true;
+    return Uint8Array;
+  }
+}
+var v9 = new Float64Array(v7);
+
+assert(species_called);
+assert(Reflect.getPrototypeOf(v9.buffer) === Uint8Array.prototype);