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Re: [BUGREPORT] git diff-tree --cc SEGFAUTs

From
Junio C Hamano <gitster@pobox.com>
Date
Jan 4, 2025, 02:55 UTC
Message-ID
<xmqq4j2fnv8p.fsf@gitster.g>
In-Reply-To
<20250104003154.GB3244554@coredump.intra.peff.net>
Jeff King <peff@peff.net> writes:
Show 8 quoted lines
> ... OTOH it is not really
> solving the more fundamental problem, which is that p->parent[i].path is
> only sometimes useful (we do not fill it in if it would just be the same
> as p->path, so the patch only changes it from uninitialized memory into
> an empty strbuf).
>
> And that is probably not something we want to change, as allocating
> duplicates of each path may be expensive.

Nicely said. I reached the same conclusion after looking at the existing code, even though I have to admit that I am not a huge fan of the more recent part of combine-diff.c and its data structures.

Thanks.
Previous: Jeff KingNext: Jeff King
Message 5 of 38 in “[BUGREPORT] git diff-tree --cc SEGFAUTs”
  1. Wink SavilleJan 3, 2025
  2. Jeff KingJan 3, 2025
  3. Wink SavilleJan 3, 2025
  4. Jeff KingJan 4, 2025
  5. Junio C HamanoJan 4, 2025
  6. Jeff KingJan 4, 2025
  7. Wink SavilleJan 4, 2025
  8. Wink SavilleJan 5, 2025
  9. 0/14 combine-diff cleanupsJeff King, Jan 9, 2025
  10. 01/14 run_diff_files(): delay allocation of combine_diff_pathJeff King, Jan 9, 2025
  11. Junio C HamanoJan 9, 2025
  12. 02/14 combine-diff: add combine_diff_path_new()Jeff King, Jan 9, 2025
  13. Junio C HamanoJan 9, 2025
  14. Patrick SteinhardtJan 13, 2025
  15. Jeff KingJan 14, 2025
  16. 03/14 tree-diff: clear parent array in path_appendnew()Jeff King, Jan 9, 2025
  17. Junio C HamanoJan 9, 2025
  18. Jeff KingJan 10, 2025
  19. 04/14 combine-diff: use pointer for parent pathsJeff King, Jan 9, 2025
  20. Junio C HamanoJan 9, 2025
  21. 05/14 diff: add a comment about combine_diff_path.parent.pathJeff King, Jan 9, 2025
  22. Patrick SteinhardtJan 13, 2025
  23. 06/14 run_diff_files(): de-mystify the size of combine_diff_path structJeff King, Jan 9, 2025
  24. Junio C HamanoJan 10, 2025
  25. 07/14 tree-diff: drop path_appendnew() alloc optimizationJeff King, Jan 9, 2025
  26. Patrick SteinhardtJan 13, 2025
  27. Jeff KingJan 14, 2025
  28. 08/14 tree-diff: pass whole path string to path_appendnew()Jeff King, Jan 9, 2025
  29. Patrick SteinhardtJan 13, 2025
  30. Jeff KingJan 14, 2025
  31. 09/14 tree-diff: inline path_appendnew()Jeff King, Jan 9, 2025
  32. Junio C HamanoJan 11, 2025
  33. 10/14 combine-diff: drop public declaration of combine_diff_path_size()Jeff King, Jan 9, 2025
  34. 11/14 tree-diff: drop list-tail argument to diff_tree_paths()Jeff King, Jan 9, 2025
  35. Junio C HamanoJan 18, 2025
  36. 12/14 tree-diff: use the name "tail" to refer to list tailJeff King, Jan 9, 2025
  37. 13/14 tree-diff: simplify emit_path() list managementJeff King, Jan 9, 2025
  38. 14/14 tree-diff: make list tail-passing more explicitJeff King, Jan 9, 2025

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