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// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////
import * as vscode from 'vscode';
const fs = require('fs');
import {println} from '../logger';
import {commandHistory} from '../commandUtils';
import {systemSyncLogIfFailure} from '../utils';
import {buildFuzzersFromWorkspace} from '../ossfuzzWrappers';
import {extensionConfig} from '../config';
const readline = require('readline');
export async function cmdInputCollectorReproduceTestcase() {
// Runs a fuzzer from a given project.
const crashFileInput = await vscode.window.showInputBox({
value: '',
placeHolder: 'The ID of the testcase.',
});
if (!crashFileInput) {
return;
}
// Create an history object and append it to the command history.
const args = new Object({
crashFile: crashFileInput.toString(),
});
const commandObject = new Object({
commandType: 'oss-fuzz.ReproduceFuzzer',
Arguments: args,
dispatcherFunc: cmdDispatchReproduceTestcase,
});
commandHistory.push(commandObject);
await cmdDispatchReproduceTestcase(args);
return true;
}
async function cmdDispatchReproduceTestcase(args: any) {
await reproduceTestcase(args.crashFile);
}
export async function reproduceTestcase(crashInfoFileInput: string) {
println('Reproducing testcase for ' + crashInfoFileInput);
println('Checking directory: ' + extensionConfig.crashesDirectory);
const crashInfoFile =
extensionConfig.crashesDirectory + '/' + crashInfoFileInput + '.info';
println(crashInfoFile);
try {
if (fs.existsSync(crashInfoFile)) {
println('File exists');
} else {
println('Crash file does not exist');
return;
}
} catch (err) {
console.error(err);
return;
}
// At this point the file exists
const r = readline.createInterface({
input: fs.createReadStream(crashInfoFile),
});
let targetProject = 'N/A';
let targetFuzzer = 'N/A';
// Logic for passing the file. This is based off of clusterfuzz monorail reports,
// and the intention is the file needs to be a copy of:
//
// Project: project-name
// Fuzzing Engine: libFuzzer
// Fuzz Target: fuzzer-name
//
// Example:
// The following URL: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=59747
// has the bug information:
// """
// Project: my-fuzzing-project
// Fuzzing Engine: libFuzzer
// Fuzz Target: the-fuzzer-name-fuzz-parseXX
// Job Type: libfuzzer_asan_my-fuzzing-project
// Platform Id: linux
// """
// and a link to a reproducer test case:
// https://oss-fuzz.com/download?testcase_id=5009071179431936
// which, when accessed will download the file
// clusterfuzz-testcase-minimized-flb-it-fuzz-config_map_fuzzer_OSSFUZZ-5009071179431936
//
// To enable reproducing of this issue we need to:
// - 1) Download the crash file and place it in the directory given in config.ts
// and "crashesDirectory" variable.
// - 2) create a file "5009071179431936.info" and paste the information above
// (Project:... Fuzz Target: ...) into the file. This information is
// needed because we need to know project name and fuzzer name in order
// to reproduce the crash.
// - 3) the reproducer can now be reproduced using the reproduce command
// with argument "5009071179431936" as argument.
r.on('line', (text: string) => {
println(text);
if (text.startsWith('Project: ')) {
println('Starts with project');
println(text.split('Project: ').toString());
targetProject = text.split('Project: ')[1];
} else if (text.startsWith('Fuzzing Engine: ')) {
println('Starts with fuzzing engine');
} else if (text.startsWith('Fuzz Target:')) {
println('Starts with Fuzz Target');
targetFuzzer = text.split('Fuzz Target: ')[1];
} else if (text.startsWith('Job Type:')) {
println('Starts with Job Type');
}
});
r.on('close', async () => {
println('Target project: ' + targetProject);
println('Target fuzzer: ' + targetFuzzer);
// Build a fresh version of the project.
const buildResult: boolean = await buildFuzzersFromWorkspace(
targetProject,
'',
true
);
if (!buildResult) {
println('Failed to build fuzzers');
return false;
}
// We have a fresh build of the project, proceed to reproduce the testcase.
const crashInputTestCase =
extensionConfig.crashesDirectory +
'/' +
'clusterfuzz-testcase-minimized-' +
targetFuzzer +
'-' +
crashInfoFileInput;
// Run reproduce command against the target file
// Build the fuzzers using OSS-Fuzz infrastructure.
const cmdToExec = 'python3';
const args = [
extensionConfig.ossFuzzPepositoryWorkPath + '/infra/helper.py',
'reproduce',
targetProject,
targetFuzzer,
crashInputTestCase,
];
if (!(await systemSyncLogIfFailure(cmdToExec, args))) {
println('Failed to reproduce testcase');
}
return true;
});
}
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