30 lines
962 B
JavaScript
30 lines
962 B
JavaScript
|
// 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-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);
|
||
|
|
})();
|