85 lines
2.8 KiB
JavaScript
85 lines
2.8 KiB
JavaScript
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// Copyright 2018 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: --wasm-shared-engine --no-wasm-disable-structured-cloning --allow-natives-syntax --experimental-wasm-threads
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load('test/mjsunit/wasm/wasm-module-builder.js');
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// In this test we start a worker which enters wasm and stays there in a loop.
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// The main thread stays in JS and checks that its thread-in-wasm flag is not
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// set. The main thread calls setTimeout after every check to give the worker a
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// chance to be scheculed.
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const sync_address = 12;
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(function TestPostModule() {
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let builder = new WasmModuleBuilder();
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let sig_index = builder.addType(kSig_v_v);
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let import_id = builder.addImport('m', 'func', sig_index);
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builder.addFunction('wait', kSig_v_v)
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.addBody([
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// Calling the imported function sets the thread-in-wasm flag of the
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// main thread.
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kExprCallFunction, import_id, // --
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kExprLoop, kWasmStmt, // --
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kExprI32Const, sync_address, // --
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kExprI32LoadMem, 0, 0, // --
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kExprI32Eqz,
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kExprBrIf, 0, // --
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kExprEnd,
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])
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.exportFunc();
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builder.addFunction('signal', kSig_v_v)
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.addBody([
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kExprI32Const, sync_address, // --
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kExprI32Const, 1, // --
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kExprI32StoreMem, 0, 0, // --
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])
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.exportFunc();
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builder.addImportedMemory("m", "imported_mem", 0, 1, "shared");
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let module = builder.toModule();
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let memory = new WebAssembly.Memory({initial: 1, maximum: 1, shared: true});
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let workerScript = `
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onmessage = function(msg) {
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try {
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let worker_instance = new WebAssembly.Instance(msg.module,
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{m: {imported_mem: msg.memory,
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func: _ => 5}});
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postMessage("start running");
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worker_instance.exports.wait();
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postMessage("finished");
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} catch(e) {
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postMessage('ERROR: ' + e);
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}
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}
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`;
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let worker = new Worker(workerScript, {type: 'string'});
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worker.postMessage({module: module, memory: memory});
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let main_instance = new WebAssembly.Instance(
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module, {m: {imported_mem: memory, func: _ => 7}});
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let counter = 0;
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function CheckThreadNotInWasm() {
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// We check the thread-in-wasm flag many times and reschedule ourselves in
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// between to increase the chance that we read the flag set by the worker.
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assertFalse(%IsThreadInWasm());
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counter++;
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if (counter < 100) {
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setTimeout(CheckThreadNotInWasm, 0);
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} else {
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main_instance.exports.signal(sync_address);
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assertEquals('finished', worker.getMessage());
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worker.terminate();
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}
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}
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assertFalse(%IsThreadInWasm());
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assertEquals('start running', worker.getMessage());
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CheckThreadNotInWasm();
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})();
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