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[2a01:4f8:120:2468::2]) by smtp.gmail.com with ESMTPSA id r23-20020a056402235700b00419171bc571sm2366137eda.59.2022.04.02.03.49.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Apr 2022 03:49:53 -0700 (PDT) From: =?UTF-8?q?=C3=86var=20Arnfj=C3=B6r=C3=B0=20Bjarmason?= To: git@vger.kernel.org Cc: Junio C Hamano , =?UTF-8?q?Martin=20=C3=85gren?= , Elijah Newren , Derrick Stolee , "brian m . carlson" , Phillip Wood , =?UTF-8?q?=C3=86var=20Arnfj=C3=B6r=C3=B0=20Bjarmason?= Subject: [PATCH v5 09/27] revisions API users: use release_revisions() needing REV_INFO_INIT Date: Sat, 2 Apr 2022 12:49:23 +0200 Message-Id: X-Mailer: git-send-email 2.35.1.1584.g2aeb20a6519 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Use release_revisions() to various users of "struct rev_list" which need to have their "struct rev_info" zero-initialized before we can start using it. For the bundle.c code see the early exit case added in 3bbbe467f29 (bundle verify: error out if called without an object database, 2019-05-27). For the relevant bisect.c code see 45b6370812c (bisect: libify `check_good_are_ancestors_of_bad` and its dependents, 2020-02-17). For the submodule.c code see the "goto" on "(!left || !right || !sub)" added in 8e6df65015f (submodule: refactor show_submodule_summary with helper function, 2016-08-31). Signed-off-by: Ævar Arnfjörð Bjarmason --- bisect.c | 18 ++++++++++++------ builtin/submodule--helper.c | 3 ++- bundle.c | 12 ++++++++---- revision.h | 21 ++++++++++++++++++++- submodule.c | 3 ++- 5 files changed, 44 insertions(+), 13 deletions(-) diff --git a/bisect.c b/bisect.c index cc6b8b6230d..b63669cc9d7 100644 --- a/bisect.c +++ b/bisect.c @@ -1010,7 +1010,7 @@ 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 rev_info revs; + struct rev_info revs = REV_INFO_INIT; struct commit_list *tried; int reaches = 0, all = 0, nr, steps; enum bisect_error res = BISECT_OK; @@ -1035,7 +1035,7 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix) res = check_good_are_ancestors_of_bad(r, prefix, no_checkout); if (res) - return res; + goto cleanup; bisect_rev_setup(r, &revs, prefix, "%s", "^%s", 1); @@ -1060,14 +1060,16 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix) term_good, term_bad); - return BISECT_FAILED; + res = BISECT_FAILED; + goto cleanup; } if (!all) { fprintf(stderr, _("No testable commit found.\n" "Maybe you started with bad path arguments?\n")); - return BISECT_NO_TESTABLE_COMMIT; + res = BISECT_NO_TESTABLE_COMMIT; + goto cleanup; } bisect_rev = &revs.commits->item->object.oid; @@ -1087,7 +1089,8 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix) * for negative return values for early returns up * until the cmd_bisect__helper() caller. */ - return BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND; + res = BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND; + goto cleanup; } nr = all - reaches - 1; @@ -1106,7 +1109,10 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix) /* Clean up objects used, as they will be reused. */ repo_clear_commit_marks(r, ALL_REV_FLAGS); - return bisect_checkout(bisect_rev, no_checkout); + res = bisect_checkout(bisect_rev, no_checkout); +cleanup: + release_revisions(&revs); + return res; } static inline int log2i(int n) diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c index 24980863f68..cda33ee4d2b 100644 --- a/builtin/submodule--helper.c +++ b/builtin/submodule--helper.c @@ -766,7 +766,7 @@ static void status_submodule(const char *path, const struct object_id *ce_oid, { char *displaypath; struct strvec diff_files_args = STRVEC_INIT; - struct rev_info rev; + struct rev_info rev = REV_INFO_INIT; int diff_files_result; struct strbuf buf = STRBUF_INIT; const char *git_dir; @@ -853,6 +853,7 @@ static void status_submodule(const char *path, const struct object_id *ce_oid, cleanup: strvec_clear(&diff_files_args); free(displaypath); + release_revisions(&rev); } static void status_submodule_cb(const struct cache_entry *list_item, diff --git a/bundle.c b/bundle.c index d50cfb5aa7e..6a870a6edb7 100644 --- a/bundle.c +++ b/bundle.c @@ -196,14 +196,16 @@ int verify_bundle(struct repository *r, * to be verbose about the errors */ struct string_list *p = &header->prerequisites; - struct rev_info revs; + struct rev_info revs = REV_INFO_INIT; const char *argv[] = {NULL, "--all", NULL}; struct commit *commit; int i, ret = 0, req_nr; const char *message = _("Repository lacks these prerequisite commits:"); - if (!r || !r->objects || !r->objects->odb) - return error(_("need a repository to verify a bundle")); + if (!r || !r->objects || !r->objects->odb) { + ret = error(_("need a repository to verify a bundle")); + goto cleanup; + } repo_init_revisions(r, &revs, NULL); for (i = 0; i < p->nr; i++) { @@ -221,7 +223,7 @@ int verify_bundle(struct repository *r, error("%s %s", oid_to_hex(oid), name); } if (revs.pending.nr != p->nr) - return ret; + goto cleanup; req_nr = revs.pending.nr; setup_revisions(2, argv, &revs, NULL); @@ -284,6 +286,8 @@ int verify_bundle(struct repository *r, printf_ln("The bundle uses this filter: %s", list_objects_filter_spec(&header->filter)); } +cleanup: + release_revisions(&revs); return ret; } diff --git a/revision.h b/revision.h index b9070e43428..2621eb6d65a 100644 --- a/revision.h +++ b/revision.h @@ -329,6 +329,25 @@ struct rev_info { struct tmp_objdir *remerge_objdir; }; +/** + * Initialize the "struct rev_info" structure with a macro. + * + * This will not fully initialize a "struct rev_info", the + * repo_init_revisions() function needs to be called before + * setup_revisions() and any revision walking takes place. + * + * Use REV_INFO_INIT to make the "struct rev_info" safe for passing to + * release_revisions() when it's inconvenient (e.g. due to a "goto + * cleanup" pattern) to arrange for repo_init_revisions() to be called + * before release_revisions() is called. + * + * Initializing with this REV_INFO_INIT is redundant to invoking + * repo_init_revisions(). If repo_init_revisions() is guaranteed to be + * called before release_revisions() the "struct rev_info" can be left + * uninitialized. + */ +#define REV_INFO_INIT { 0 } + /** * Initialize a rev_info structure with default values. The third parameter may * be NULL or can be prefix path, and then the `.prefix` variable will be set @@ -363,7 +382,7 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, /** * Free data allocated in a "struct rev_info" after it's been - * initialized with repo_init_revisions(). + * initialized with repo_init_revisions() or REV_INFO_INIT. */ void release_revisions(struct rev_info *revs); diff --git a/submodule.c b/submodule.c index 7b5d7753930..7923e951e1c 100644 --- a/submodule.c +++ b/submodule.c @@ -619,7 +619,7 @@ void show_submodule_diff_summary(struct diff_options *o, const char *path, struct object_id *one, struct object_id *two, unsigned dirty_submodule) { - struct rev_info rev; + struct rev_info rev = REV_INFO_INIT; struct commit *left = NULL, *right = NULL; struct commit_list *merge_bases = NULL; struct repository *sub; @@ -646,6 +646,7 @@ void show_submodule_diff_summary(struct diff_options *o, const char *path, out: free_commit_list(merge_bases); + release_revisions(&rev); clear_commit_marks(left, ~0); clear_commit_marks(right, ~0); if (sub) { -- 2.35.1.1585.gd85f8dcb745