utils: flush gcov data before closing files

[giuseppe]

make sure the gcov data is flushed before closing all the files.

[gemini-code-assist]

Summary of Changes

Hello @giuseppe, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a critical fix to prevent the loss of code coverage data generated by gcov. By strategically adding a GCOV_DUMP() call before file descriptors are closed, it guarantees that all collected coverage information is properly written to disk, especially during cleanup phases. This enhancement improves the reliability of code coverage reporting.

Highlights

• Code Coverage Data Preservation: Ensured that gcov code coverage data is explicitly flushed before file descriptors are closed, preventing potential data loss.
• Conditional Flush: The GCOV_DUMP() function is now called conditionally, specifically when file descriptors are being closed immediately (close_now is true).

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[gemini-code-assist]

Code Review

This pull request adds a call to GCOV_DUMP() to ensure code coverage data is flushed before file descriptors are closed. This is a good addition for ensuring accurate coverage reports. My review includes one suggestion to wrap the new code in a preprocessor conditional to avoid potential build issues in non-coverage builds.

[gemini-code-assist]

The GCOV_DUMP() macro is likely only available in coverage builds. To prevent build failures in non-coverage configurations, this block should be wrapped in a preprocessor conditional, for example #ifdef ENABLE_GCOV or a similar macro used in this project for coverage builds.

#ifdef ENABLE_GCOV
  /* Flush gcov data before closing all fds.  Any code coverage after this point will be lost.  */
  if (close_now)
    GCOV_DUMP ();
#endif

[packit-as-a-service]

TMT tests failed. @containers/packit-build please check.

[flouthoc]

LGTM, @giuseppe commit or PR is missing the reason for adding this.

[flouthoc]

Nvm I see it in code comment.