mailbox.js - mozsearch

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// |reftest| skip-if(!xulRuntime.shell)

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/

*/

// Tests the shared-object mailbox in the shell.

var hasSharedMemory = !!(this.SharedArrayBuffer &&

                         this.getSharedObject &&

                         this.setSharedObject);

if (!hasSharedMemory) {

    reportCompare(true, true);

    quit(0);

var sab = new SharedArrayBuffer(12);

var mem = new Int32Array(sab);

// SharedArrayBuffer mailbox tests

assertEq(getSharedObject(), null); // Mbx starts empty

assertEq(setSharedObject(mem.buffer), undefined); // Setter returns undefined

assertEq(getSharedObject() == null, false);       // And then the mbx is not empty

var v = getSharedObject();

assertEq(v.byteLength, mem.buffer.byteLength); // Looks like what we put in?

var w = new Int32Array(v);

mem[0] = 314159;

assertEq(w[0], 314159);		// Shares memory (locally) with what we put in?

mem[0] = 0;

setSharedObject(3.14);	// Share numbers

assertEq(getSharedObject(), 3.14);

setSharedObject(null);	// Setting to null clears to null

assertEq(getSharedObject(), null);

setSharedObject(mem.buffer);

setSharedObject(undefined); // Setting to undefined clears to null

assertEq(getSharedObject(), null);

setSharedObject(mem.buffer);

setSharedObject();		// Setting without arguments clears to null

assertEq(getSharedObject(), null);

// Non-shared objects cannot be stored in the mbx

assertThrowsInstanceOf(() => setSharedObject({x:10, y:20}), Error);

assertThrowsInstanceOf(() => setSharedObject([1,2]), Error);

assertThrowsInstanceOf(() => setSharedObject(new ArrayBuffer(10)), Error);

assertThrowsInstanceOf(() => setSharedObject(new Int32Array(10)), Error);

assertThrowsInstanceOf(() => setSharedObject(false), Error);

assertThrowsInstanceOf(() => setSharedObject(mem), Error);

assertThrowsInstanceOf(() => setSharedObject("abracadabra"), Error);

assertThrowsInstanceOf(() => setSharedObject(() => 37), Error);

// We can store wasm shared memories, too

if (!this.WebAssembly || !wasmThreadsEnabled()) {

    reportCompare(true, true);

    quit(0);

setSharedObject(null);

var mem = new WebAssembly.Memory({initial: 1, maximum: 1, shared: true});

setSharedObject(mem);

var ia1 = new Int32Array(mem.buffer);

var mem2 = getSharedObject();

assertEq(mem2.buffer instanceof SharedArrayBuffer, true);

assertEq(mem2.buffer.byteLength, 65536);

var ia2 = new Int32Array(mem2.buffer);

ia2[37] = 0x12345678;

assertEq(ia1[37], 0x12345678);

// Can't store a non-shared memory

assertThrowsInstanceOf(() => setSharedObject(new WebAssembly.Memory({initial: 1, maximum: 1})), Error);

// We can store wasm modules

var mod = new WebAssembly.Module(wasmTextToBinary(`(module

                                                    (import "m" "f" (func (param i32) (result i32)))

                                                    (func (export "hi") (result i32)

                                                     (i32.const 37))

                                                    )`));

setSharedObject(mod);

var mod2 = getSharedObject();

// This should fail because we're not providing the correct import object

assertThrowsInstanceOf(() => new WebAssembly.Instance(mod2, {m:{}}), WebAssembly.LinkError);

// But this should work

new WebAssembly.Instance(mod2, {m:{f:(x) => x}});

reportCompare(true,true);