mirror of https://github.com/google/oss-fuzz.git
68 lines
2.2 KiB
Markdown
68 lines
2.2 KiB
Markdown
---
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layout: default
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title: ClusterFuzz
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parent: Further reading
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nav_order: 1
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permalink: /further-reading/clusterfuzz/
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---
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# ClusterFuzz
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[ClusterFuzz](https://github.com/google/clusterfuzz) is the distributed fuzzing
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infrastructure behind OSS-Fuzz. It was initially built for fuzzing Chrome at
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scale.
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- TOC
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{:toc}
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---
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## Web interface
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ClusterFuzz provides a [web interface](https://oss-fuzz.com)
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to view statistics about your fuzz targets, as well as current crashes.
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*Note*: Access is restricted to project developers who we auto CC on new bug
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reports.
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## Testcase reports
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ClusterFuzz will automatically de-duplicate and file reproducible crashes into
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our [bug tracker](https://bugs.chromium.org/p/oss-fuzz/issues/list). We provide
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a crash report page that gives you the stack trace, a link to the crashing
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testcase, and regression ranges where the bug was most likely introduced.
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![report]({{ site.baseurl }}/images/pcre2_testcase.png?raw=true)
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## Fuzzer stats
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You can view statistics about your fuzz targets (e.g. speed, coverage
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information, memory usage) on our fuzzer statistics dashboard.
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![stats]({{ site.baseurl }}/images/freetype_stats_graphs.png?raw=true)
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![stats]({{ site.baseurl }}/images/freetype_stats_table.png?raw=true)
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## Coverage reports
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We provide coverage reports, where we highlight the parts of source code that
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are being reached by your fuzz target. Make sure to look at the uncovered code
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marked in red and add appropriate fuzz targets to cover those usecases.
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![coverage_1]({{ site.baseurl }}/images/freetype_coverage_1.png?raw=true)
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![coverage_2]({{ site.baseurl }}/images/freetype_coverage_2.png?raw=true)
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## Performance analyzer
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You can view performance issues that your fuzz target is running into (e.g.
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leaks, timeouts, etc) by clicking on `Performance` link on our fuzzer statistics
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dashboard. Make sure to fix all cited issues, so as to keep your fuzz target
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running efficiently and finding new bugs.
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![performance_analyzer]({{ site.baseurl }}/images/expat_performance_analyzer.png?raw=true)
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## Crash stats
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You can view statistics of crashes over time on our crash statistics dashboard.
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![crash_stats]({{ site.baseurl }}/images/crash_stats.png?raw=true)
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