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30 lines
962 B
JavaScript
30 lines
962 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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load('test/mjsunit/wasm/wasm-module-builder.js');
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// This test checks for accidental sign extension. The Wasm spec says we do
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// arbitrary precision unsigned arithmetic to compute the memory address,
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// meaning this test should do 0xfffffffc + 8, which is 0x100000004 and out of
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// bounds. However, if we interpret 0xfffffffc as -4, then the result is 4 and
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// succeeds erroneously.
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(function() {
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let builder = new WasmModuleBuilder();
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builder.addMemory(1, 1, false);
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builder.addFunction('test', kSig_v_v)
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.addBody([
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kExprI32Const, 0x7c, // address = -4
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kExprI32Const, 0,
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kExprI32StoreMem, 0, 8, // align = 0, offset = 8
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])
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.exportFunc();
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let module = builder.instantiate();
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assertTraps(kTrapMemOutOfBounds, module.exports.test);
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})();
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