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// Copyright 2020 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: --allow-natives-syntax
utils.load('test/inspector/wasm-inspector-test.js');
let {session, contextGroup, Protocol} =
InspectorTest.start('Tests pausing a running script and stepping');
var builder = new WasmModuleBuilder();
let pause = builder.addImport('imports', 'pause', kSig_v_v);
let f = builder.addFunction('f', kSig_i_i)
.addBody([
kExprLocalGet, 0,
kExprI32Const, 1,
kExprI32Add]);
let main = builder.addFunction('main', kSig_i_v)
.addBody([
kExprCallFunction, pause,
kExprI32Const, 12, kExprCallFunction, f.index])
.exportFunc();
var module_bytes = builder.toArray();
function instantiate(bytes, imports) {
var buffer = new ArrayBuffer(bytes.length);
var view = new Uint8Array(buffer);
for (var i = 0; i < bytes.length; ++i) {
view[i] = bytes[i] | 0;
}
const module = new WebAssembly.Module(buffer);
return new WebAssembly.Instance(module, imports);
}
InspectorTest.runAsyncTestSuite([
async function testPauseAndStep() {
await Protocol.Debugger.enable();
InspectorTest.log('Instantiate');
const instantiate_code = `var instance = (${instantiate})(${JSON.stringify(module_bytes)}, {'imports': {'pause': () => { %ScheduleBreak() } }});`;
WasmInspectorTest.evalWithUrl(instantiate_code, 'instantiate');
InspectorTest.log('Wait for script');
const [, {params: wasmScript}] = await Protocol.Debugger.onceScriptParsed(2);
InspectorTest.log('Got wasm script: ' + wasmScript.url);
InspectorTest.log('Run');
Protocol.Runtime.evaluate({expression: 'instance.exports.main()'});
InspectorTest.log('Expecting to pause at ' + (f.body_offset - 1));
await waitForPauseAndStep('stepInto');
await waitForPauseAndStep('stepInto');
await waitForPauseAndStep('stepInto');
await waitForPauseAndStep('stepInto');
await waitForPauseAndStep('resume');
}
]);
async function waitForPauseAndStep(stepAction) {
const msg = await Protocol.Debugger.oncePaused();
await inspect(msg.params.callFrames[0]);
Protocol.Debugger[stepAction]();
}
async function inspect(frame) {
let loc = frame.location;
let line = [`Paused at offset ${loc.columnNumber}`];
// Inspect only the top wasm frame.
for (var scope of frame.scopeChain) {
if (scope.type == 'module') continue;
var { objectId } = scope.object;
if (scope.type == 'wasm-expression-stack') {
objectId = (await Protocol.Runtime.callFunctionOn({
functionDeclaration: 'function() { return this.stack }',
objectId
})).result.result.objectId;
}
var properties =
await Protocol.Runtime.getProperties({objectId});
let str = (await Promise.all(properties.result.result.map(
elem => WasmInspectorTest.getWasmValue(elem.value))))
.join(', ');
line.push(`${scope.type}: [${str}]`);
}
InspectorTest.log(line.join('; '));
}
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