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bisect.c: partially fix bisect_rev_setup() memory leak

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Partially fix the memory leak noted in in 8a534b6124 (bisect: use
argv_array API, 2011-09-13), which added the "XXX" comment seen in the
context. We can partially fix it by having the bisect_rev_setup()
function take a "struct strvec", rather than constructing it.

As the comment notes we need to keep the construct "rev_argv" around
while the "struct rev_info" is around, which as seen in the newly
added "strvec_clear()" calls here we do after "release_revisions()".

This "partially" fixes the memory leak because we're leaking the "--"
added to the "rev_argv" here still, which will be addressed in a
subsequent commit.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2022-08-02 17:33:15 +02:00 committed by Junio C Hamano
parent f89d085b3f
commit 57efebb9b9
1 changed files with 13 additions and 9 deletions
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22
bisect.c
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@ -648,11 +648,11 @@ static struct commit_list *managed_skipped(struct commit_list *list,
}
static void bisect_rev_setup(struct repository *r, struct rev_info *revs,
struct strvec *rev_argv,
const char *prefix,
const char *bad_format, const char *good_format,
int read_paths)
{
struct strvec rev_argv = STRVEC_INIT;
int i;
repo_init_revisions(r, revs, prefix);
@ -660,16 +660,16 @@ static void bisect_rev_setup(struct repository *r, struct rev_info *revs,
revs->commit_format = CMIT_FMT_UNSPECIFIED;
/* rev_argv.argv[0] will be ignored by setup_revisions */
strvec_push(&rev_argv, "bisect_rev_setup");
strvec_pushf(&rev_argv, bad_format, oid_to_hex(current_bad_oid));
strvec_push(rev_argv, "bisect_rev_setup");
strvec_pushf(rev_argv, bad_format, oid_to_hex(current_bad_oid));
for (i = 0; i < good_revs.nr; i++)
strvec_pushf(&rev_argv, good_format,
strvec_pushf(rev_argv, good_format,
oid_to_hex(good_revs.oid + i));
strvec_push(&rev_argv, "--");
strvec_push(rev_argv, "--");
if (read_paths)
read_bisect_paths(&rev_argv);
read_bisect_paths(rev_argv);
setup_revisions(rev_argv.nr, rev_argv.v, revs, NULL);
setup_revisions(rev_argv->nr, rev_argv->v, revs, NULL);
/* XXX leak rev_argv, as "revs" may still be pointing to it */
}
@ -873,10 +873,11 @@ static enum bisect_error check_merge_bases(int rev_nr, struct commit **rev, int
static int check_ancestors(struct repository *r, int rev_nr,
struct commit **rev, const char *prefix)
{
struct strvec rev_argv = STRVEC_INIT;
struct rev_info revs;
int res;
bisect_rev_setup(r, &revs, prefix, "^%s", "%s", 0);
bisect_rev_setup(r, &revs, &rev_argv, prefix, "^%s", "%s", 0);
bisect_common(&revs);
res = (revs.commits != NULL);
@ -885,6 +886,7 @@ static int check_ancestors(struct repository *r, int rev_nr,
clear_commit_marks_many(rev_nr, rev, ALL_REV_FLAGS);
release_revisions(&revs);
strvec_clear(&rev_argv);
return res;
}
@ -1010,6 +1012,7 @@ void read_bisect_terms(const char **read_bad, const char **read_good)
*/
enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
{
struct strvec rev_argv = STRVEC_INIT;
struct rev_info revs = REV_INFO_INIT;
struct commit_list *tried;
int reaches = 0, all = 0, nr, steps;
@ -1037,7 +1040,7 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
if (res)
goto cleanup;
bisect_rev_setup(r, &revs, prefix, "%s", "^%s", 1);
bisect_rev_setup(r, &revs, &rev_argv, prefix, "%s", "^%s", 1);
revs.first_parent_only = !!(bisect_flags & FIND_BISECTION_FIRST_PARENT_ONLY);
revs.limited = 1;
@ -1112,6 +1115,7 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
res = bisect_checkout(bisect_rev, no_checkout);
cleanup:
release_revisions(&revs);
strvec_clear(&rev_argv);
return res;
}