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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
load('test/mjsunit/wasm/wasm-constants.js');
load('test/mjsunit/wasm/wasm-module-builder.js');
// This test checks for accidental sign extension. The Wasm spec says we do
// arbitrary precision unsigned arithmetic to compute the memory address,
// meaning this test should do 0xfffffffc + 8, which is 0x100000004 and out of
// bounds. However, if we interpret 0xfffffffc as -4, then the result is 4 and
// succeeds erroneously.
(function() {
let builder = new WasmModuleBuilder();
builder.addMemory(1, 1, false);
builder.addFunction('test', kSig_v_v)
.addBody([
kExprI32Const, 0x7c, // address = -4
kExprI32Const, 0,
kExprI32StoreMem, 0, 8, // align = 0, offset = 8
])
.exportFunc();
let module = builder.instantiate();
assertTraps(kTrapMemOutOfBounds, module.exports.test);
})();
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