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[PATCH v2 04/13] sparse-checkout: clear patterns when init() sees existing sparse file

From
Jeff King <peff@peff.net>
Date
Jun 4, 2024, 10:13 UTC
Message-ID
<20240604101317.GD1304593@coredump.intra.peff.net>
In-Reply-To
<20240604100814.GA1304520@coredump.intra.peff.net>

In sparse_checkout_init(), we first try to load patterns from an existing file. If we found any, we return immediately, but end up leaking the patterns we parsed. Fixing this reduces the number of leaks in t7002 from 9 down to 5.

Note that there are two other exits from the function, but they don't need the same treatment:

  - if we can't resolve HEAD, we write out a hard-coded sparse file and
    return. But we know the pattern list is empty there, since we didn't
    find any in the on-disk file and we haven't yet added any of our
    own.
  - otherwise, we do populate the list and then tail-call into
    write_patterns_and_update(). But that function frees the
    pattern_list itself, so we don't need to.
Signed-off-by: Jeff King <peff@peff.net>
---
 builtin/sparse-checkout.c | 1 +
 1 file changed, 1 insertion(+)
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
index 7c17ed238c..923e6ecc0a 100644
--- a/builtin/sparse-checkout.c
+++ b/builtin/sparse-checkout.c
@@ -472,6 +472,7 @@ static int sparse_checkout_init(int argc, const char **argv, const char *prefix)
 	/* If we already have a sparse-checkout file, use it. */
 	if (res >= 0) {
 		free(sparse_filename);
+		clear_pattern_list(&pl);
 		return update_working_directory(NULL);
 	}
 
-- 
2.45.2.807.g3b5fadc4da
Previous: Jeff KingNext: Jeff King
Message 30 of 43 in “leak fixes for sparse-checkout code”
  1. 0/13 leak fixes for sparse-checkout codeJeff King, May 31, 2024
  2. 01/13 sparse-checkout: free string list in write_cone_to_file()Jeff King, May 31, 2024
  3. 02/13 sparse-checkout: pass string literals directly to add_pattern()Jeff King, May 31, 2024
  4. Junio C HamanoMay 31, 2024
  5. Jeff KingJun 4, 2024
  6. 03/13 dir.c: free strings in sparse cone pattern hashmapsJeff King, May 31, 2024
  7. 04/13 sparse-checkout: clear patterns when init() sees existing sparse fileJeff King, May 31, 2024
  8. 05/13 dir.c: free removed sparse-pattern hashmap entriesJeff King, May 31, 2024
  9. 06/13 dir.c: always copy input to add_pattern()Jeff King, May 31, 2024
  10. Junio C HamanoMay 31, 2024
  11. 07/13 sparse-checkout: reuse --stdin buffer when reading patternsJeff King, May 31, 2024
  12. 08/13 sparse-checkout: always free "line" strbuf after reading inputJeff King, May 31, 2024
  13. 09/13 sparse-checkout: refactor temporary sparse_checkout_patternsJeff King, May 31, 2024
  14. Patrick SteinhardtJun 4, 2024
  15. Jeff KingJun 4, 2024
  16. 10/13 sparse-checkout: free sparse_filename after useJeff King, May 31, 2024
  17. Patrick SteinhardtJun 4, 2024
  18. Jeff KingJun 4, 2024
  19. Patrick SteinhardtJun 4, 2024
  20. 11/13 sparse-checkout: free pattern list in sparse_checkout_list()Jeff King, May 31, 2024
  21. 12/13 sparse-checkout: free string list after displayingJeff King, May 31, 2024
  22. 13/13 sparse-checkout: free duplicate hashmap entriesJeff King, May 31, 2024
  23. Patrick SteinhardtJun 4, 2024
  24. Jeff KingMay 31, 2024
  25. Junio C HamanoMay 31, 2024
  26. 0/13 leak fixes for sparse-checkout codeJeff King, Jun 4, 2024
  27. 01/13 sparse-checkout: free string list in write_cone_to_file()Jeff King, Jun 4, 2024
  28. 02/13 sparse-checkout: pass string literals directly to add_pattern()Jeff King, Jun 4, 2024
  29. 03/13 dir.c: free strings in sparse cone pattern hashmapsJeff King, Jun 4, 2024
  30. 04/13 sparse-checkout: clear patterns when init() sees existing sparse fileJeff King, Jun 4, 2024
  31. 05/13 dir.c: free removed sparse-pattern hashmap entriesJeff King, Jun 4, 2024
  32. 06/13 dir.c: always copy input to add_pattern()Jeff King, Jun 4, 2024
  33. René ScharfeJun 5, 2024
  34. Jeff KingJun 5, 2024
  35. Junio C HamanoJun 5, 2024
  36. 07/13 sparse-checkout: reuse --stdin buffer when reading patternsJeff King, Jun 4, 2024
  37. 08/13 sparse-checkout: always free "line" strbuf after reading inputJeff King, Jun 4, 2024
  38. 09/13 sparse-checkout: refactor temporary sparse_checkout_patternsJeff King, Jun 4, 2024
  39. 10/13 sparse-checkout: free sparse_filename after useJeff King, Jun 4, 2024
  40. 11/13 sparse-checkout: free pattern list in sparse_checkout_list()Jeff King, Jun 4, 2024
  41. 12/13 sparse-checkout: free string list after displayingJeff King, Jun 4, 2024
  42. 13/13 sparse-checkout: free duplicate hashmap entriesJeff King, Jun 4, 2024
  43. Patrick SteinhardtJun 4, 2024

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