7b79a02d2b
This CL adds a --debug-in-liftoff flag, which takes another path in
{WasmScript::SetBreakPointForFunction}, and sets the breakpoint via
{wasm::DebugInfo} (Liftoff-related) instead of {WasmDebugInfo} (C++
interpreter related).
Actual breakpoint support is not there yet, so the new test which sets
this flag does not currently break anywhere. This will change with a
future CL.
R=thibaudm@chromium.org
Bug: v8:10147
Change-Id: I95a905e666b8f502366d2c7273c8f25a267ee184
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2012920
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65921}
94 lines
3.2 KiB
JavaScript
94 lines
3.2 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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// Flags: --debug-in-liftoff
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const {session, contextGroup, Protocol} =
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InspectorTest.start('Tests stepping through wasm scripts.');
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utils.load('test/mjsunit/wasm/wasm-module-builder.js');
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const builder = new WasmModuleBuilder();
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const func_a_idx =
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builder.addFunction('wasm_A', kSig_v_v).addBody([kExprNop, kExprNop]).index;
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// wasm_B calls wasm_A <param0> times.
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const func_b = builder.addFunction('wasm_B', kSig_v_i)
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.addBody([
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// clang-format off
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kExprLoop, kWasmStmt, // while
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kExprLocalGet, 0, // -
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kExprIf, kWasmStmt, // if <param0> != 0
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kExprLocalGet, 0, // -
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kExprI32Const, 1, // -
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kExprI32Sub, // -
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kExprLocalSet, 0, // decrease <param0>
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kExprCallFunction, func_a_idx, // -
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kExprBr, 1, // continue
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kExprEnd, // -
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kExprEnd, // break
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// clang-format on
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])
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.exportAs('main');
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const module_bytes = builder.toArray();
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function instantiate(bytes) {
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let buffer = new ArrayBuffer(bytes.length);
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let view = new Uint8Array(buffer);
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for (let i = 0; i < bytes.length; ++i) {
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view[i] = bytes[i] | 0;
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}
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let module = new WebAssembly.Module(buffer);
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return new WebAssembly.Instance(module);
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}
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const getResult = msg => msg.result || InspectorTest.logMessage(msg);
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const evalWithUrl = (code, url) =>
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Protocol.Runtime
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.evaluate({'expression': code + '\n//# sourceURL=v8://test/' + url})
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.then(getResult);
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function setBreakpoint(offset, script) {
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InspectorTest.log(
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'Setting breakpoint at offset ' + offset + ' on script ' + script.url);
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return Protocol.Debugger
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.setBreakpoint(
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{'location': {'scriptId': script.scriptId, 'lineNumber': 0, 'columnNumber': offset}})
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.then(getResult);
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}
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Protocol.Debugger.onPaused(pause_msg => {
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let loc = pause_msg.params.callFrames[0].location;
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if (loc.lineNumber != 0) {
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InspectorTest.log('Unexpected line number: ' + loc.lineNumber);
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}
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InspectorTest.log('Breaking on byte offset ' + loc.columnNumber);
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Protocol.Debugger.resume();
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});
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(async function test() {
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await Protocol.Debugger.enable();
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InspectorTest.log('Instantiating.');
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// Spawn asynchronously:
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let instantiate_code = 'const instance = (' + instantiate + ')(' +
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JSON.stringify(module_bytes) + ');';
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evalWithUrl(instantiate_code, 'instantiate');
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InspectorTest.log(
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'Waiting for wasm script (ignoring first non-wasm script).');
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// Ignore javascript and full module wasm script, get scripts for functions.
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const [, {params: wasm_script}] = await Protocol.Debugger.onceScriptParsed(2);
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for (offset of [11, 10, 8, 6, 2, 4]) {
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await setBreakpoint(func_b.body_offset + offset, wasm_script);
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}
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InspectorTest.log('Calling main(4)');
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await evalWithUrl('instance.exports.main(4)', 'runWasm');
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InspectorTest.log('exports.main returned!');
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InspectorTest.log('Finished!');
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InspectorTest.completeTest();
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})();
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