Why Did This Reviewed Code Crash?
_{An Empirical Study of Mozilla Firefox}

Requirements

• Python 2.7 or newer

File description

• analytic_scripts folder contains the scripts to mine software repositories (please configure the variable HG_REPO_PATH as your own Mozilla VCS path in each of the scripts in this folder).
  • crash_inducing.py: identify commits that lead to crashes (crash-inducing commits).
  • basic_metrics.py and review_metrics.py: extract metrics for reviewed patches.
  • mann-whitney.py: calculate two tailed Mann-Whiteny U test to compare the differences between reviewed patches that crash and reviewed patches that do not crash as well as Cliff's delta effect size on the differences.
• statistics folder contains data extracted from software repositories.
• data folder contains data extracted from various software repostories, including Bugzilla, VCS, and Mozilla crash reports.
• crash_report_examples folder contains crash report examples downloaded from Mozilla crash archive.

How to user the analytic scripts

1. Down load Mozilla bug reports via REST API (https://wiki.mozilla.org/Bugzilla:REST_API).
2. Run crash_inducing.py to identify crash-inducing commits.
3. Run basic_metrics.py and review_metrics.py to extract metrics from reviewed patches for statistical analyses.
4. Run mann-whitney.py to perform different statistical analyses.

Data source

• Socorro local crash reports are available in: https://crash-analysis.mozilla.com
• Firefox' Mercurial repository: https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Source_Code/Mercurial

For any questions

Please send email to [email protected]