v8/tools/clusterfuzz/js_fuzzer/build_db.js
Michael Achenbach 0ffc1ba5fc [js-fuzzer] Make db more robust to failing code fragments.
Until now, the cross-over mutator would choke on several expressions
from DB and bail out (just wastes some time). We also have a script,
test_db.js to test on how many expressions it is going to bail out.

With this change, we already omit adding such expressions to the
DB in the first place. As a result, the test_db script now returns
zero failing expressions (while all other expressions remain).

Regression tests that now no longer apply are removed, instead a
test is added that ensures that a failing expression isn't added
to the DB.

No-Try: true
Bug: chromium:1044942
Change-Id: I14a4fe802c99114cf3a8f71188273475a7cb9c13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3129340
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76598}
2021-08-31 11:28:21 +00:00

66 lines
1.4 KiB
JavaScript

// 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.
/**
* @fileoverview Collect JS nodes.
*/
const program = require('commander');
const corpus = require('./corpus.js');
const db = require('./db.js');
const path = require('path');
const sourceHelpers = require('./source_helpers.js');
function main() {
Error.stackTraceLimit = Infinity;
program
.version('0.0.1')
.option('-i, --input_dir <path>', 'Input directory.')
.option('-o, --output_dir <path>', 'Output directory.')
.parse(process.argv);
if (!program.args.length) {
console.log('Need to specify corpora.');
return;
}
if (!program.output_dir) {
console.log('Need to specify output dir.');
return;
}
const mutateDb = new db.MutateDbWriter(program.output_dir);
const inputDir = path.resolve(program.input_dir);
for (const corpusName of program.args) {
const curCorpus = new corpus.Corpus(inputDir, corpusName);
for (const relPath of curCorpus.relFiles()) {
let source;
try {
source = sourceHelpers.loadSource(inputDir, relPath);
} catch (e) {
console.log(e);
continue;
}
if (!source) {
continue;
}
try{
mutateDb.process(source);
} catch (e) {
console.log(e);
}
}
}
mutateDb.writeIndex();
}
main();