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// Copyright 2016 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.
// Flags: --expose-wasm --expose-gc
load("test/mjsunit/wasm/wasm-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");
// This test verifies that when instances are exported, Gc'ed, the other
// instances in the chain still maintain a consistent view of the memory.
(function ValidateSharedInstanceMemory() {
print("ValidateSharedInstanceMemory");
let memory = new WebAssembly.Memory({initial: 5, maximum: 100});
var builder = new WasmModuleBuilder();
builder.addImportedMemory("mod", "imported_mem");
builder.addFunction("mem_size", kSig_i_v)
.addBody([kExprMemorySize, kMemoryZero])
.exportFunc();
builder.addFunction("grow", kSig_i_i)
.addBody([kExprGetLocal, 0, kExprGrowMemory, kMemoryZero])
.exportFunc();
var instances = [];
for (var i = 0; i < 5; i++) {
instances.push(builder.instantiate({mod: {imported_mem: memory}}));
}
function grow_instance_0(pages) { return instances[0].exports.grow(pages); }
function grow_instance_1(pages) { return instances[1].exports.grow(pages); }
function grow_instance_2(pages) { return instances[2].exports.grow(pages); }
function grow_instance_3(pages) { return instances[3].exports.grow(pages); }
function grow_instance_4(pages) { return instances[4].exports.grow(pages); }
var start_index = 0;
var end_index = 5;
function verify_mem_size(expected_pages) {
assertEquals(expected_pages*kPageSize, memory.buffer.byteLength);
for (var i = start_index; i < end_index; i++) {
assertEquals(expected_pages, instances[i].exports.mem_size());
}
}
// Verify initial memory size of all instances, grow and verify that all
// instances are updated correctly.
verify_mem_size(5);
assertEquals(5, memory.grow(6));
verify_mem_size(11);
instances[1] = null;
gc();
// i[0] - i[2] - i[3] - i[4]
start_index = 2;
verify_mem_size(11);
assertEquals(11, instances[0].exports.mem_size());
assertEquals(11, grow_instance_2(10));
assertEquals(21*kPageSize, memory.buffer.byteLength);
verify_mem_size(21);
assertEquals(21, instances[0].exports.mem_size());
instances[4] = null;
gc();
// i[0] - i[2] - i[3]
assertEquals(21, instances[0].exports.mem_size());
assertEquals(21, instances[2].exports.mem_size());
assertEquals(21, instances[3].exports.mem_size());
assertEquals(21, memory.grow(2));
assertEquals(23*kPageSize, memory.buffer.byteLength);
assertEquals(23, instances[0].exports.mem_size());
assertEquals(23, instances[2].exports.mem_size());
assertEquals(23, instances[3].exports.mem_size());
instances[0] = null;
gc();
// i[2] - i[3]
assertEquals(23, instances[2].exports.mem_size());
assertEquals(23, instances[3].exports.mem_size());
assertEquals(23, grow_instance_3(5));
assertEquals(28*kPageSize, memory.buffer.byteLength);
assertEquals(28, instances[2].exports.mem_size());
assertEquals(28, instances[3].exports.mem_size());
// Instantiate a new instance and verify that it can be grown correctly.
instances.push(builder.instantiate({mod: {imported_mem: memory}}));
function grow_instance_5(pages) { return instances[5].exports.grow(pages); }
// i[2] - i[3] - i[5]
assertEquals(28, instances[2].exports.mem_size());
assertEquals(28, instances[3].exports.mem_size());
assertEquals(28, instances[5].exports.mem_size());
assertEquals(28, grow_instance_5(2));
assertEquals(30*kPageSize, memory.buffer.byteLength);
assertEquals(30, instances[2].exports.mem_size());
assertEquals(30, instances[3].exports.mem_size());
assertEquals(30, instances[5].exports.mem_size());
assertEquals(30, memory.grow(5));
assertEquals(35*kPageSize, memory.buffer.byteLength);
assertEquals(35, instances[2].exports.mem_size());
assertEquals(35, instances[3].exports.mem_size());
assertEquals(35, instances[5].exports.mem_size());
})();
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