diff options
author | Ævar Arnfjörð Bjarmason <avarab@gmail.com> | 2022-11-08 21:17:51 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2022-11-21 06:32:48 +0300 |
commit | ac95f5d36adb42980064587fd7910fa275ff853e (patch) | |
tree | 9971f5e482dea36993d32224666996ee514c2a71 /builtin | |
parent | 603f2f5719f8a85996d5f20cf0e56186c149b923 (diff) |
built-ins: use free() not UNLEAK() if trivial, rm dead code
For a lot of uses of UNLEAK() it would be quite tricky to release the
memory involved, or we're missing the relevant *_(release|clear)()
functions. But in these cases we have them already, and can just
invoke them on the variable(s) involved, instead of UNLEAK().
For "builtin/worktree.c" the UNLEAK() was also added in [1], but the
struct member it's unleaking was removed in [2]. The only non-"int"
member of that structure is "const char *keep_locked", which comes to
us via "argv" or a string literal[3].
We have good visibility via the compiler and
tooling (e.g. SANITIZE=address) on bad free()-ing, but none on
UNLEAK() we don't need anymore. So let's prefer releasing the memory
when it's easy.
For "bugreport", "worktree" and "config" we need to start using a "ret
= ..." return pattern. For "builtin/bugreport.c" these UNLEAK() were
added in [4], and for "builtin/config.c" in [1].
For "config" the code seen here was the only user of the "value"
variable. For "ACTION_{RENAME,REMOVE}_SECTION" we need to be sure to
return the right exit code in the cases where we were relying on
falling through to the top-level.
I think there's still a use-case for UNLEAK(), but hat it's changed
since then. Using it so that "we can see the real leaks" is
counter-productive in these cases.
It's more useful to have UNLEAK() be a marker of the remaining odd
cases where it's hard to free() the memory for whatever reason. With
this change less than 20 of them remain in-tree.
1. 0e5bba53af7 (add UNLEAK annotation for reducing leak false
positives, 2017-09-08)
2. d861d34a6ed (worktree: remove extra members from struct add_opts,
2018-04-24)
3. 0db4961c49b (worktree: teach `add` to accept --reason <string> with
--lock, 2021-07-15)
4. 0e5bba53af7 and 00d8c311050 (commit: fix "author_ident" leak,
2022-05-12).
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Diffstat (limited to 'builtin')
-rw-r--r-- | builtin/add.c | 2 | ||||
-rw-r--r-- | builtin/bugreport.c | 9 | ||||
-rw-r--r-- | builtin/commit.c | 6 | ||||
-rw-r--r-- | builtin/config.c | 42 | ||||
-rw-r--r-- | builtin/diff.c | 2 | ||||
-rw-r--r-- | builtin/worktree.c | 7 |
6 files changed, 35 insertions, 33 deletions
diff --git a/builtin/add.c b/builtin/add.c index f84372964c..c68ebafed5 100644 --- a/builtin/add.c +++ b/builtin/add.c @@ -695,6 +695,6 @@ finish: die(_("Unable to write new index file")); dir_clear(&dir); - UNLEAK(pathspec); + clear_pathspec(&pathspec); return exit_status; } diff --git a/builtin/bugreport.c b/builtin/bugreport.c index 96052541cb..5bc254be80 100644 --- a/builtin/bugreport.c +++ b/builtin/bugreport.c @@ -106,6 +106,7 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix) const char *user_relative_path = NULL; char *prefixed_filename; size_t output_path_len; + int ret; const struct option bugreport_options[] = { OPT_CALLBACK_F(0, "diagnose", &diagnose, N_("mode"), @@ -182,7 +183,9 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix) user_relative_path); free(prefixed_filename); - UNLEAK(buffer); - UNLEAK(report_path); - return !!launch_editor(report_path.buf, NULL, NULL); + strbuf_release(&buffer); + + ret = !!launch_editor(report_path.buf, NULL, NULL); + strbuf_release(&report_path); + return ret; } diff --git a/builtin/commit.c b/builtin/commit.c index c291199b70..f88a29167f 100644 --- a/builtin/commit.c +++ b/builtin/commit.c @@ -1874,8 +1874,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix) apply_autostash(git_path_merge_autostash(the_repository)); cleanup: - UNLEAK(author_ident); - UNLEAK(err); - UNLEAK(sb); + strbuf_release(&author_ident); + strbuf_release(&err); + strbuf_release(&sb); return ret; } diff --git a/builtin/config.c b/builtin/config.c index 753e5fac29..060cf9f3e0 100644 --- a/builtin/config.c +++ b/builtin/config.c @@ -639,8 +639,9 @@ static char *default_user_config(void) int cmd_config(int argc, const char **argv, const char *prefix) { int nongit = !startup_info->have_repository; - char *value; + char *value = NULL; int flags = 0; + int ret = 0; given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT)); @@ -856,44 +857,38 @@ int cmd_config(int argc, const char **argv, const char *prefix) free(config_file); } else if (actions == ACTION_SET) { - int ret; check_write(); check_argc(argc, 2, 2); value = normalize_value(argv[0], argv[1]); - UNLEAK(value); ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value); if (ret == CONFIG_NOTHING_SET) error(_("cannot overwrite multiple values with a single value\n" " Use a regexp, --add or --replace-all to change %s."), argv[0]); - return ret; } else if (actions == ACTION_SET_ALL) { check_write(); check_argc(argc, 2, 3); value = normalize_value(argv[0], argv[1]); - UNLEAK(value); - return git_config_set_multivar_in_file_gently(given_config_source.file, - argv[0], value, argv[2], - flags); + ret = git_config_set_multivar_in_file_gently(given_config_source.file, + argv[0], value, argv[2], + flags); } else if (actions == ACTION_ADD) { check_write(); check_argc(argc, 2, 2); value = normalize_value(argv[0], argv[1]); - UNLEAK(value); - return git_config_set_multivar_in_file_gently(given_config_source.file, - argv[0], value, - CONFIG_REGEX_NONE, - flags); + ret = git_config_set_multivar_in_file_gently(given_config_source.file, + argv[0], value, + CONFIG_REGEX_NONE, + flags); } else if (actions == ACTION_REPLACE_ALL) { check_write(); check_argc(argc, 2, 3); value = normalize_value(argv[0], argv[1]); - UNLEAK(value); - return git_config_set_multivar_in_file_gently(given_config_source.file, - argv[0], value, argv[2], - flags | CONFIG_FLAGS_MULTI_REPLACE); + ret = git_config_set_multivar_in_file_gently(given_config_source.file, + argv[0], value, argv[2], + flags | CONFIG_FLAGS_MULTI_REPLACE); } else if (actions == ACTION_GET) { check_argc(argc, 1, 2); @@ -934,26 +929,28 @@ int cmd_config(int argc, const char **argv, const char *prefix) flags | CONFIG_FLAGS_MULTI_REPLACE); } else if (actions == ACTION_RENAME_SECTION) { - int ret; check_write(); check_argc(argc, 2, 2); ret = git_config_rename_section_in_file(given_config_source.file, argv[0], argv[1]); if (ret < 0) return ret; - if (ret == 0) + else if (!ret) die(_("no such section: %s"), argv[0]); + else + ret = 0; } else if (actions == ACTION_REMOVE_SECTION) { - int ret; check_write(); check_argc(argc, 1, 1); ret = git_config_rename_section_in_file(given_config_source.file, argv[0], NULL); if (ret < 0) return ret; - if (ret == 0) + else if (!ret) die(_("no such section: %s"), argv[0]); + else + ret = 0; } else if (actions == ACTION_GET_COLOR) { check_argc(argc, 1, 2); @@ -966,5 +963,6 @@ int cmd_config(int argc, const char **argv, const char *prefix) return get_colorbool(argv[0], argc == 2); } - return 0; + free(value); + return ret; } diff --git a/builtin/diff.c b/builtin/diff.c index 854d2c5a5c..cb63f157dd 100644 --- a/builtin/diff.c +++ b/builtin/diff.c @@ -609,7 +609,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix) if (1 < rev.diffopt.skip_stat_unmatch) refresh_index_quietly(); release_revisions(&rev); - UNLEAK(ent); + object_array_clear(&ent); UNLEAK(blob); return result; } diff --git a/builtin/worktree.c b/builtin/worktree.c index 4a24d53be1..591d659fae 100644 --- a/builtin/worktree.c +++ b/builtin/worktree.c @@ -629,6 +629,7 @@ static int add(int ac, const char **av, const char *prefix) N_("try to match the new branch name with a remote-tracking branch")), OPT_END() }; + int ret; memset(&opts, 0, sizeof(opts)); opts.checkout = 1; @@ -705,9 +706,9 @@ static int add(int ac, const char **av, const char *prefix) die(_("--[no-]track can only be used if a new branch is created")); } - UNLEAK(path); - UNLEAK(opts); - return add_worktree(path, branch, &opts); + ret = add_worktree(path, branch, &opts); + free(path); + return ret; } static void show_worktree_porcelain(struct worktree *wt, int line_terminator) |