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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.
utils.load('test/inspector/wasm-inspector-test.js');
let {session, contextGroup, Protocol} =
InspectorTest.start('Tests stepping through wasm scripts by byte offsets');
session.setupScriptMap();
const builder = new WasmModuleBuilder();
const func_a =
builder.addFunction('wasm_A', kSig_v_i).addBody([kExprNop, kExprNop]);
const func_a_idx = func_a.index;
// wasm_B calls wasm_A <param0> times.
const func_b = builder.addFunction('wasm_B', kSig_v_i)
.addBody([
// clang-format off
kExprLoop, kWasmVoid, // while
kExprLocalGet, 0, // -
kExprIf, kWasmVoid, // if <param0> != 0
kExprLocalGet, 0, // -
kExprI32Const, 1, // -
kExprI32Sub, // -
kExprLocalSet, 0, // decrease <param0>
...wasmI32Const(1024), // some longer i32 const (2 byte imm)
kExprCallFunction, func_a_idx, // -
kExprBr, 1, // continue
kExprEnd, // -
kExprEnd, // break
// clang-format on
])
.exportAs('main');
const module_bytes = builder.toArray();
const loop_start_offset = func_b.body_offset + 2;
const loop_body_start_offset = loop_start_offset + 2;
const loop_body_end_offset = loop_body_start_offset + 14;
const if_statement_offset = loop_body_start_offset + 2
const call_function_offset = loop_body_start_offset + 12;
const func_a_start_offset = func_a.body_offset;
const func_a_end_offset = func_a_start_offset + 2;
InspectorTest.runAsyncTestSuite([
async function test() {
await Protocol.Debugger.enable();
InspectorTest.log('Setting up global instance variable');
WasmInspectorTest.instantiate(module_bytes);
const [, {params: wasmScript}] = await Protocol.Debugger.onceScriptParsed(2);
const scriptId = wasmScript.scriptId;
InspectorTest.log('Got wasm script: ' + wasmScript.url);
let bpmsg = await Protocol.Debugger.setBreakpoint({
location:
{scriptId: scriptId, lineNumber: 0, columnNumber: loop_start_offset}
});
InspectorTest.logMessage(bpmsg.result.actualLocation);
await checkValidSkipLists(scriptId);
await checkInvalidSkipLists(scriptId);
}
]);
async function checkValidSkipLists(scriptId) {
InspectorTest.log('Test with valid skip lists');
Protocol.Runtime.evaluate({expression: 'instance.exports.main(8)'});
const {params: {callFrames}} = await Protocol.Debugger.oncePaused();
await session.logSourceLocation(callFrames[0].location);
InspectorTest.log('Test: Stepping over without skip list');
let skipList = [];
await stepThroughOneLoopIteration(skipList, 'stepOver');
InspectorTest.log('Test: Stepping over with skip list');
skipList = [
createLocationRange(scriptId, loop_body_start_offset, if_statement_offset),
createLocationRange(scriptId, call_function_offset, loop_body_end_offset)
];
await stepThroughOneLoopIteration(skipList, 'stepOver');
InspectorTest.log('Test: Stepping over start location is inclusive');
skipList = [
createLocationRange(
scriptId, loop_body_start_offset, loop_body_end_offset - 1),
];
await stepThroughOneLoopIteration(skipList, 'stepOver');
InspectorTest.log('Test: Stepping over end location is exclusive');
skipList = [
createLocationRange(
scriptId, loop_body_start_offset + 1, loop_body_end_offset),
];
await stepThroughOneLoopIteration(skipList, 'stepOver');
InspectorTest.log('Test: Stepping into without skip list');
skipList = [];
await stepThroughOneLoopIteration(skipList, 'stepInto');
InspectorTest.log(
'Test: Stepping into with skip list, while call itself is skipped');
skipList = [
createLocationRange(scriptId, func_a_start_offset, func_a_end_offset),
createLocationRange(scriptId, if_statement_offset, loop_body_end_offset)
];
await stepThroughOneLoopIteration(skipList, 'stepInto');
InspectorTest.log('Test: Stepping into start location is inclusive');
skipList = [
createLocationRange(scriptId, func_a_start_offset, func_a_end_offset - 1),
];
await stepThroughOneLoopIteration(skipList, 'stepInto');
InspectorTest.log('Test: Stepping into end location is exclusive');
skipList = [
createLocationRange(scriptId, func_a_start_offset - 1, func_a_end_offset),
];
await stepThroughOneLoopIteration(skipList, 'stepInto');
await Protocol.Debugger.resume();
}
async function checkInvalidSkipLists(scriptId) {
InspectorTest.log('Test with invalid skip lists');
Protocol.Runtime.evaluate({expression: 'instance.exports.main(8)'});
const {params: {callFrames}} = await Protocol.Debugger.oncePaused();
await session.logSourceLocation(callFrames[0].location);
const actions = ['stepOver', 'stepInto'];
for (let action of actions) {
InspectorTest.log('Test: start position has invalid column number');
let skipList = [
createLocationRange(scriptId, -1, loop_body_end_offset),
];
await stepThroughOneLoopIteration(skipList, action);
InspectorTest.log('Test: start position has invalid line number');
skipList = [{
scriptId: scriptId,
start: {lineNumber: -1, columnNumber: 0},
end: {lineNumber: 0, columnNumber: loop_body_end_offset}
}];
await stepThroughOneLoopIteration(skipList, action);
InspectorTest.log('Test: end position smaller than start position');
skipList = [createLocationRange(
scriptId, loop_body_end_offset, loop_body_start_offset)];
await stepThroughOneLoopIteration(skipList, action);
InspectorTest.log('Test: skip list is not maximally merged');
skipList = [
createLocationRange(
scriptId, loop_body_start_offset, if_statement_offset),
createLocationRange(scriptId, if_statement_offset, loop_body_end_offset)
];
await stepThroughOneLoopIteration(skipList, action);
InspectorTest.log('Test: skip list is not sorted');
skipList = [
createLocationRange(scriptId, if_statement_offset, loop_body_end_offset),
createLocationRange(
scriptId, loop_body_start_offset, loop_body_end_offset)
];
await stepThroughOneLoopIteration(skipList, action);
}
}
async function stepThroughOneLoopIteration(skipList, stepAction) {
InspectorTest.log(
`Testing ${stepAction} with skipList: ${JSON.stringify(skipList)}`);
let topFrameLocation = -1;
while (topFrameLocation.columnNumber != loop_start_offset) {
const stepOverMsg = await Protocol.Debugger[stepAction]({skipList});
if (stepOverMsg.error) {
InspectorTest.log(stepOverMsg.error.message);
return;
}
const {params: {callFrames}} = await Protocol.Debugger.oncePaused();
topFrameLocation = callFrames[0].location;
await session.logSourceLocation(topFrameLocation);
}
}
function createLocationRange(scriptId, startColumn, endColumn) {
return {
scriptId: scriptId, start: {lineNumber: 0, columnNumber: startColumn},
end: {lineNumber: 0, columnNumber: endColumn}
}
}
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