cfebd19a3a
For debugging code, disable opcode merging. Otherwise, the effect of the first merged opcode would not be observable when stepping. R=thibaudm@chromium.org Bug: v8:10350 Change-Id: Id656c9dee8f9676bf3d7881f3782e5ead76b5e71 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2306802 Commit-Queue: Clemens Backes <clemensb@chromium.org> Reviewed-by: Thibaud Michaud <thibaudm@chromium.org> Cr-Commit-Position: refs/heads/master@{#68960}
66 lines
2.4 KiB
JavaScript
66 lines
2.4 KiB
JavaScript
// Copyright 2020 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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utils.load('test/inspector/wasm-inspector-test.js');
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let {session, contextGroup, Protocol} = InspectorTest.start(
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'Tests that Liftoff does not merge opcodes while stepping');
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session.setupScriptMap();
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let builder = new WasmModuleBuilder();
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// i32.eqz and br_if are usually merged, so we wouldn't see any
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// update on the operand stack after i32.eqz. For debugging,
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// this is disabled, so we should see the result.
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let body = [kExprLocalGet, 0, kExprI32Eqz, kExprBrIf, 0];
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let fun = builder.addFunction('fun', kSig_v_i).addBody(body).exportFunc();
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let module_bytes = builder.toArray();
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let wasm_script_id = undefined;
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Protocol.Debugger.onPaused(printPauseLocationAndStep);
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(async function test() {
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await Protocol.Debugger.enable();
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WasmInspectorTest.instantiate(module_bytes);
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[, {params: {scriptId: wasm_script_id}}] = await Protocol.Debugger.onceScriptParsed(2);
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// Set a breakpoint at the beginning of 'fun'.
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const offset = fun.body_offset;
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InspectorTest.log(`Setting breakpoint at offset ${offset}.`);
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let bpmsg = await Protocol.Debugger.setBreakpoint({
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location: {scriptId: wasm_script_id, lineNumber: 0, columnNumber: offset}
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});
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for (let value of [0, -1, 13]) {
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await Protocol.Runtime.evaluate(
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{expression: `instance.exports.fun(${value})`});
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}
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InspectorTest.log('Finished.');
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})().catch(reason => InspectorTest.log(`Failed: ${reason}`))
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.finally(InspectorTest.completeTest);
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async function printPauseLocationAndStep(msg) {
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// If we are outside of wasm, continue.
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let loc = msg.params.callFrames[0].location;
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if (loc.scriptId != wasm_script_id) {
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Protocol.Debugger.resume();
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return;
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}
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// Inspect only the top wasm frame.
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let frame = msg.params.callFrames[0];
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let scopes = {};
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for (let scope of frame.scopeChain) {
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if (scope.type == 'module') continue;
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let scope_properties =
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await Protocol.Runtime.getProperties({objectId: scope.object.objectId});
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scopes[scope.type] = scope_properties.result.result.map(
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elem => WasmInspectorTest.getWasmValue(elem.value));
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}
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let values = scopes['local'].concat(scopes['wasm-expression-stack']).join(', ');
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InspectorTest.log(`Paused at offset ${loc.columnNumber}: [${values}]`);
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Protocol.Debugger.stepOver();
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}
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