84 lines
2.6 KiB
JavaScript
84 lines
2.6 KiB
JavaScript
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// Copyright 2021 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: --experimental-wasm-memory64
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load('test/mjsunit/wasm/wasm-module-builder.js');
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// We use standard JavaScript doubles to represent bytes and offsets. They offer
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// enough precision (53 bits) for every allowed memory size.
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function BasicMemory64Tests(num_pages) {
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const num_bytes = num_pages * kPageSize;
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print(`Testing ${num_bytes} bytes (${num_pages} pages)`);
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let builder = new WasmModuleBuilder();
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builder.addMemory64(num_pages, num_pages, true);
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builder.addFunction('load', makeSig([kWasmF64], [kWasmI32]))
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.addBody([
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kExprLocalGet, 0, // local.get 0
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kExprI64UConvertF64, // i64.uconvert_sat.f64
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kExprI32LoadMem, 0, 0, // i32.load_mem align=1 offset=0
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])
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.exportFunc();
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builder.addFunction('store', makeSig([kWasmF64, kWasmI32], []))
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.addBody([
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kExprLocalGet, 0, // local.get 0
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kExprI64UConvertF64, // i64.uconvert_sat.f64
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kExprLocalGet, 1, // local.get 1
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kExprI32StoreMem, 0, 0, // i32.store_mem align=1 offset=0
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])
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.exportFunc();
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let module = builder.instantiate();
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let memory = module.exports.memory;
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let load = module.exports.load;
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let store = module.exports.store;
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let array = new Int8Array(memory.buffer);
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assertEquals(num_bytes, array.length);
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assertEquals(0, load(num_bytes - 4));
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assertThrows(() => load(num_bytes - 3));
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store(num_bytes - 4, 0x12345678);
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assertEquals(0x12345678, load(num_bytes - 4));
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let kStoreOffset = 27;
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store(kStoreOffset, 11);
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assertEquals(11, load(kStoreOffset));
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// Now check 100 random positions. All except for kStoreOffset should be zero.
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for (let i = 0; i < 100; ++i) {
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let position = Math.floor(Math.random() * num_bytes);
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if (position == kStoreOffset) continue;
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assertEquals(0, array[position]);
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}
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}
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(function TestSmallMemory() {
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print(arguments.callee.name);
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BasicMemory64Tests(4);
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})();
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(function Test3GBMemory() {
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print(arguments.callee.name);
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let num_pages = 3 * 1024 * 1024 * 1024 / kPageSize;
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// This test can fail if 3GB of memory cannot be allocated.
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try {
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BasicMemory64Tests(num_pages);
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} catch (e) {
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assertInstanceof(e, RangeError);
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assertMatches(/Out of memory/, e.message);
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}
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})();
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// TODO(clemensb): Allow for memories >4GB and enable this test.
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//(function Test5GBMemory() {
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// print(arguments.callee.name);
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// let num_pages = 5 * 1024 * 1024 * 1024 / kPageSize;
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// BasicMemory64Tests(num_pages);
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//})();
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