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// META: global=window,dedicatedworker,jsshell,shadowrealm
// META: script=/wasm/jsapi/memory/assertions.js
test(() => {
const argument = { "initial": 0 };
const memory = new WebAssembly.Memory(argument);
assert_throws_js(TypeError, () => memory.grow());
}, "Missing arguments");
test(t => {
const thisValues = [
undefined,
null,
true,
"",
Symbol(),
1,
{},
WebAssembly.Memory,
WebAssembly.Memory.prototype,
];
const argument = {
valueOf: t.unreached_func("Should not touch the argument (valueOf)"),
toString: t.unreached_func("Should not touch the argument (toString)"),
};
const fn = WebAssembly.Memory.prototype.grow;
for (const thisValue of thisValues) {
assert_throws_js(TypeError, () => fn.call(thisValue, argument), `this=${format_value(thisValue)}`);
}
}, "Branding");
test(() => {
const argument = { "initial": 0 };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 0 }, "Buffer before growing");
const result = memory.grow(2);
assert_equals(result, 0);
const newMemory = memory.buffer;
assert_not_equals(oldMemory, newMemory);
assert_ArrayBuffer(oldMemory, { "detached": true }, "Old buffer after growing");
assert_ArrayBuffer(newMemory, { "size": 2 }, "New buffer after growing");
}, "Zero initial");
test(() => {
const argument = { "initial": { valueOf() { return 0 } } };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 0 }, "Buffer before growing");
const result = memory.grow({ valueOf() { return 2 } });
assert_equals(result, 0);
const newMemory = memory.buffer;
assert_not_equals(oldMemory, newMemory);
assert_ArrayBuffer(oldMemory, { "detached": true }, "Old buffer after growing");
assert_ArrayBuffer(newMemory, { "size": 2 }, "New buffer after growing");
}, "Zero initial with valueOf");
test(() => {
const argument = { "initial": 3 };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 3 }, "Buffer before growing");
const result = memory.grow(2);
assert_equals(result, 3);
const newMemory = memory.buffer;
assert_not_equals(oldMemory, newMemory);
assert_ArrayBuffer(oldMemory, { "detached": true }, "Old buffer after growing");
assert_ArrayBuffer(newMemory, { "size": 5 }, "New buffer after growing");
}, "Non-zero initial");
test(() => {
const argument = { "initial": 0, "maximum": 2 };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 0 }, "Buffer before growing");
const result = memory.grow(2);
assert_equals(result, 0);
const newMemory = memory.buffer;
assert_not_equals(oldMemory, newMemory);
assert_ArrayBuffer(oldMemory, { "detached": true }, "Old buffer after growing");
assert_ArrayBuffer(newMemory, { "size": 2 }, "New buffer after growing");
}, "Zero initial with respected maximum");
test(() => {
const argument = { "initial": 0, "maximum": 2 };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 0 }, "Buffer before growing");
const result = memory.grow(1);
assert_equals(result, 0);
const newMemory = memory.buffer;
assert_not_equals(oldMemory, newMemory);
assert_ArrayBuffer(oldMemory, { "detached": true }, "Old buffer after growing once");
assert_ArrayBuffer(newMemory, { "size": 1 }, "New buffer after growing once");
const result2 = memory.grow(1);
assert_equals(result2, 1);
const newestMemory = memory.buffer;
assert_not_equals(newMemory, newestMemory);
assert_ArrayBuffer(oldMemory, { "detached": true }, "New buffer after growing twice");
assert_ArrayBuffer(newMemory, { "detached": true }, "New buffer after growing twice");
assert_ArrayBuffer(newestMemory, { "size": 2 }, "Newest buffer after growing twice");
}, "Zero initial with respected maximum grown twice");
test(() => {
const argument = { "initial": 1, "maximum": 2 };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 1 }, "Buffer before growing");
assert_throws_js(RangeError, () => memory.grow(2));
assert_equals(memory.buffer, oldMemory);
assert_ArrayBuffer(memory.buffer, { "size": 1 }, "Buffer before trying to grow");
}, "Zero initial growing too much");
const outOfRangeValues = [
undefined,
NaN,
Infinity,
-Infinity,
-1,
0x100000000,
0x1000000000,
"0x100000000",
{ valueOf() { return 0x100000000; } },
];
for (const value of outOfRangeValues) {
test(() => {
const argument = { "initial": 0 };
const memory = new WebAssembly.Memory(argument);
assert_throws_js(TypeError, () => memory.grow(value));
}, `Out-of-range argument: ${format_value(value)}`);
}
test(() => {
const argument = { "initial": 0 };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 0 }, "Buffer before growing");
const result = memory.grow(2, {});
assert_equals(result, 0);
const newMemory = memory.buffer;
assert_not_equals(oldMemory, newMemory);
assert_ArrayBuffer(oldMemory, { "detached": true }, "Old buffer after growing");
assert_ArrayBuffer(newMemory, { "size": 2 }, "New buffer after growing");
}, "Stray argument");
test(() => {
const argument = { "initial": 1, "maximum": 2, "shared": true };
const memory = new WebAssembly.Memory(argument);
const oldMemory = memory.buffer;
assert_ArrayBuffer(oldMemory, { "size": 1, "shared": true }, "Buffer before growing");
const result = memory.grow(1);
assert_equals(result, 1);
const newMemory = memory.buffer;
assert_not_equals(oldMemory, newMemory);
assert_ArrayBuffer(oldMemory, { "size": 1, "shared": true }, "Old buffer after growing");
assert_ArrayBuffer(newMemory, { "size": 2, "shared": true }, "New buffer after growing");
// The old and new buffers must have the same value for the
// [[ArrayBufferData]] internal slot.
const oldArray = new Uint8Array(oldMemory);
const newArray = new Uint8Array(newMemory);
assert_equals(oldArray[0], 0, "old first element");
assert_equals(newArray[0], 0, "new first element");
oldArray[0] = 1;
assert_equals(oldArray[0], 1, "old first element");
assert_equals(newArray[0], 1, "new first element");
}, "Growing shared memory does not detach old buffer");
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