@matheusbsbs / matheus-bagliano / commits / ae1b383dfa

revisions API: have release_revisions() release "topo_walk_info"

Refactor the existing reset_topo_walk() into a thin wrapper for a release_revisions_topo_walk_info() + resetting the member to "NULL", and call release_revisions_topo_walk_info() from release_revisions(). This fixes memory leaks that have been with us ever since "topo_walk_info" was added to revision.[ch] in f0d9cc4196a (revision.c: begin refactoring --topo-order logic, 2018-11-01). Due to various other leaks this makes no tests pass in their entirety, but e.g. before this running this on git.git: ./git -P log --pretty=tformat:"%P %H | %s" --parents --full-history --topo-order -3 -- README.md Would report under SANITIZE=leak: SUMMARY: LeakSanitizer: 531064 byte(s) leaked in 6 allocation(s). Now we'll free all of that memory. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Ævar Arnfjörð Bjarmason committed Apr 14, 2022 at 07:56 UTC ae1b383dfa945d98ec3cedd744619c2028d6edf7
1 file changed +12 -4
revision.c
+12 -4
index 307f41e889..0107ac1077 100644 --- a/revision.c +++ b/revision.c @@ -2943,6 +2943,8 @@ static void release_revisions_mailmap(struct string_list *mailmap) free(mailmap); } +static void release_revisions_topo_walk_info(struct topo_walk_info *info); + void release_revisions(struct rev_info *revs) { free_commit_list(revs->commits); @@ -2956,6 +2958,7 @@ void release_revisions(struct rev_info *revs) free_grep_patterns(&revs->grep_filter); diff_free(&revs->pruning); reflog_walk_info_release(revs->reflog_info); + release_revisions_topo_walk_info(revs->topo_walk_info); } static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child) @@ -3468,17 +3471,22 @@ static void compute_indegrees_to_depth(struct rev_info *revs, indegree_walk_step(revs); } -static void reset_topo_walk(struct rev_info *revs) +static void release_revisions_topo_walk_info(struct topo_walk_info *info) { - struct topo_walk_info *info = revs->topo_walk_info; - + if (!info) + return; clear_prio_queue(&info->explore_queue); clear_prio_queue(&info->indegree_queue); clear_prio_queue(&info->topo_queue); clear_indegree_slab(&info->indegree); clear_author_date_slab(&info->author_date); + free(info); +} - FREE_AND_NULL(revs->topo_walk_info); +static void reset_topo_walk(struct rev_info *revs) +{ + release_revisions_topo_walk_info(revs->topo_walk_info); + revs->topo_walk_info = NULL; } static void init_topo_walk(struct rev_info *revs)