ea48d83d37
This makes sure that property lookups on the provided imports object are non-observable to JavaScript. It allows instantiation failures to fall back to JavaScript proper without accidentally calling accessors twice. Also accessors might invalidate previous checks done during linking or throw exceptions. R=clemensh@chromium.org TEST=mjsunit/regress/regress-crbug-719384 BUG=chromium:719384 Change-Id: I3db2672d2a496110f705d02b82878e70cd5d701f Reviewed-on: https://chromium-review.googlesource.com/509552 Reviewed-by: Clemens Hammacher <clemensh@chromium.org> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45481}
35 lines
935 B
JavaScript
35 lines
935 B
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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(function TestThrowingObserver() {
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function Module(stdlib, foreign) {
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"use asm";
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var x = foreign.x | 0;
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function f() {}
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return { f:f };
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}
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var observer = { get x() { throw new Error() } };
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assertThrows(() => Module(this, observer));
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assertFalse(%IsAsmWasmCode(Module));
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})();
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(function TestMutatingObserver() {
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function Module(stdlib, foreign) {
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"use asm";
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var x = +foreign.x;
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var PI = stdlib.Math.PI;
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function f() {
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return +(PI + x);
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}
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return { f:f };
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}
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var stdlib = { Math : { PI : Math.PI } };
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var observer = { get x() { stdlib.Math.PI = 23; return 42; } };
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var m = Module(stdlib, observer);
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assertFalse(%IsAsmWasmCode(Module));
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assertEquals(65, m.f());
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})();
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