[PATCH 04/20] checkout: clarify memory ownership in `unique_tracking_name()`
- From
Patrick Steinhardt <ps@pks.im>
- Date
- May 23, 2024, 12:25 UTC
- Message-ID
- <ffd9eb795f315b2c03da5bcec573938e89148a95.1716465556.git.ps@pks.im>
- In-Reply-To
- <cover.1716465556.git.ps@pks.im>
The function `unique_tracking_name()` returns an allocated string, but does not clearly indicate this because its return type is `const char *` instead of `char *`. This has led to various callsites where we never free its returned memory at all, which causes memory leaks.
Plug those leaks and mark now-passing tests as leak free.
Signed-off-by: Patrick Steinhardt <ps@pks.im> --- builtin/checkout.c | 14 +++++++------ builtin/worktree.c | 20 ++++++++++--------- checkout.c | 4 ++-- checkout.h | 6 +++--- t/t2024-checkout-dwim.sh | 1 + t/t2060-switch.sh | 1 + t/t3426-rebase-submodule.sh | 1 + t/t3512-cherry-pick-submodule.sh | 1 + t/t3513-revert-submodule.sh | 1 + t/t3600-rm.sh | 1 + t/t3906-stash-submodule.sh | 1 + t/t4137-apply-submodule.sh | 1 + t/t6041-bisect-submodule.sh | 1 + t/t6438-submodule-directory-file-conflicts.sh | 1 + 14 files changed, 34 insertions(+), 20 deletions(-)
diff --git a/builtin/checkout.c b/builtin/checkout.c index f90a4ca4b7..3cf44b4683 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -1275,12 +1275,12 @@ static void setup_new_branch_info_and_source_tree( } } -static const char *parse_remote_branch(const char *arg, - struct object_id *rev, - int could_be_checkout_paths) +static char *parse_remote_branch(const char *arg, + struct object_id *rev, + int could_be_checkout_paths) { int num_matches = 0; - const char *remote = unique_tracking_name(arg, rev, &num_matches); + char *remote = unique_tracking_name(arg, rev, &num_matches); if (remote && could_be_checkout_paths) { die(_("'%s' could be both a local file and a tracking branch.\n" @@ -1316,6 +1316,7 @@ static int parse_branchname_arg(int argc, const char **argv, const char **new_branch = &opts->new_branch; int argcount = 0; const char *arg; + char *remote = NULL; int dash_dash_pos; int has_dash_dash = 0; int i; @@ -1416,8 +1417,8 @@ static int parse_branchname_arg(int argc, const char **argv, recover_with_dwim = 0; if (recover_with_dwim) { - const char *remote = parse_remote_branch(arg, rev, - could_be_checkout_paths); + remote = parse_remote_branch(arg, rev, + could_be_checkout_paths); if (remote) { *new_branch = arg; arg = remote; @@ -1459,6 +1460,7 @@ static int parse_branchname_arg(int argc, const char **argv, argc--; } + free(remote); return argcount; } diff --git a/builtin/worktree.c b/builtin/worktree.c index 7e0868df72..937da6c0ee 100644 --- a/builtin/worktree.c +++ b/builtin/worktree.c @@ -736,16 +736,14 @@ static int dwim_orphan(const struct add_opts *opts, int opt_track, int remote) return 1; } -static const char *dwim_branch(const char *path, const char **new_branch) +static char *dwim_branch(const char *path, char **new_branch) { int n; int branch_exists; const char *s = worktree_basename(path, &n); - const char *branchname = xstrndup(s, n); + char *branchname = xstrndup(s, n); struct strbuf ref = STRBUF_INIT; - UNLEAK(branchname); - branch_exists = !strbuf_check_branch_ref(&ref, branchname) && refs_ref_exists(get_main_ref_store(the_repository), ref.buf); @@ -756,8 +754,7 @@ static const char *dwim_branch(const char *path, const char **new_branch) *new_branch = branchname; if (guess_remote) { struct object_id oid; - const char *remote = - unique_tracking_name(*new_branch, &oid, NULL); + char *remote = unique_tracking_name(*new_branch, &oid, NULL); return remote; } return NULL; @@ -769,6 +766,8 @@ static int add(int ac, const char **av, const char *prefix) const char *new_branch_force = NULL; char *path; const char *branch; + char *branch_to_free = NULL; + char *new_branch_to_free = NULL; const char *new_branch = NULL; const char *opt_track = NULL; const char *lock_reason = NULL; @@ -859,16 +858,17 @@ static int add(int ac, const char **av, const char *prefix) opts.orphan = dwim_orphan(&opts, !!opt_track, 0); } else if (ac < 2) { /* DWIM: Guess branch name from path. */ - const char *s = dwim_branch(path, &new_branch); + char *s = dwim_branch(path, &new_branch_to_free); if (s) - branch = s; + branch = branch_to_free = s; + new_branch = new_branch_to_free; /* DWIM: Infer --orphan when repo has no refs. */ opts.orphan = (!s) && dwim_orphan(&opts, !!opt_track, 1); } else if (ac == 2) { struct object_id oid; struct commit *commit; - const char *remote; + char *remote; commit = lookup_commit_reference_by_name(branch); if (!commit) { @@ -923,6 +923,8 @@ static int add(int ac, const char **av, const char *prefix) ret = add_worktree(path, branch, &opts); free(path); + free(branch_to_free); + free(new_branch_to_free); return ret; } diff --git a/checkout.c b/checkout.c index 4256e71a7c..cfaea4bd10 100644 --- a/checkout.c +++ b/checkout.c @@ -45,8 +45,8 @@ static int check_tracking_name(struct remote *remote, void *cb_data) return 0; } -const char *unique_tracking_name(const char *name, struct object_id *oid, - int *dwim_remotes_matched) +char *unique_tracking_name(const char *name, struct object_id *oid, + int *dwim_remotes_matched) { struct tracking_name_data cb_data = TRACKING_NAME_DATA_INIT; const char *default_remote = NULL; diff --git a/checkout.h b/checkout.h index 3c514a5ab4..ba15a13fb3 100644 --- a/checkout.h +++ b/checkout.h @@ -8,8 +8,8 @@ * tracking branch. Return the name of the remote if such a branch * exists, NULL otherwise. */ -const char *unique_tracking_name(const char *name, - struct object_id *oid, - int *dwim_remotes_matched); +char *unique_tracking_name(const char *name, + struct object_id *oid, + int *dwim_remotes_matched); #endif /* CHECKOUT_H */ diff --git a/t/t2024-checkout-dwim.sh b/t/t2024-checkout-dwim.sh index a3b1449ef1..2caada3d83 100755 --- a/t/t2024-checkout-dwim.sh +++ b/t/t2024-checkout-dwim.sh @@ -4,6 +4,7 @@ test_description='checkout <branch> Ensures that checkout on an unborn branch does what the user expects' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # Is the current branch "refs/heads/$1"? diff --git a/t/t2060-switch.sh b/t/t2060-switch.sh index c91c4db936..77b2346291 100755 --- a/t/t2060-switch.sh +++ b/t/t2060-switch.sh @@ -5,6 +5,7 @@ test_description='switch basic functionality' GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh test_expect_success 'setup' ' diff --git a/t/t3426-rebase-submodule.sh b/t/t3426-rebase-submodule.sh index ba069dccbd..94ea88e384 100755 --- a/t/t3426-rebase-submodule.sh +++ b/t/t3426-rebase-submodule.sh @@ -2,6 +2,7 @@ test_description='rebase can handle submodules' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-submodule-update.sh . "$TEST_DIRECTORY"/lib-rebase.sh diff --git a/t/t3512-cherry-pick-submodule.sh b/t/t3512-cherry-pick-submodule.sh index f22d1ddead..9387a22a9e 100755 --- a/t/t3512-cherry-pick-submodule.sh +++ b/t/t3512-cherry-pick-submodule.sh @@ -5,6 +5,7 @@ test_description='cherry-pick can handle submodules' GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-submodule-update.sh diff --git a/t/t3513-revert-submodule.sh b/t/t3513-revert-submodule.sh index 8bfe3ed246..e178968b40 100755 --- a/t/t3513-revert-submodule.sh +++ b/t/t3513-revert-submodule.sh @@ -2,6 +2,7 @@ test_description='revert can handle submodules' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-submodule-update.sh diff --git a/t/t3600-rm.sh b/t/t3600-rm.sh index 98259e2ada..31ac31d4bc 100755 --- a/t/t3600-rm.sh +++ b/t/t3600-rm.sh @@ -8,6 +8,7 @@ test_description='Test of the various options to git rm.' GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # Setup some files to be removed, some with funny characters diff --git a/t/t3906-stash-submodule.sh b/t/t3906-stash-submodule.sh index 0f7348ec21..0f61f01ef4 100755 --- a/t/t3906-stash-submodule.sh +++ b/t/t3906-stash-submodule.sh @@ -2,6 +2,7 @@ test_description='stash can handle submodules' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-submodule-update.sh diff --git a/t/t4137-apply-submodule.sh b/t/t4137-apply-submodule.sh index 07d5262537..ebd0d4ad17 100755 --- a/t/t4137-apply-submodule.sh +++ b/t/t4137-apply-submodule.sh @@ -2,6 +2,7 @@ test_description='git apply handling submodules' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-submodule-update.sh diff --git a/t/t6041-bisect-submodule.sh b/t/t6041-bisect-submodule.sh index 82013fc903..3946e18089 100755 --- a/t/t6041-bisect-submodule.sh +++ b/t/t6041-bisect-submodule.sh @@ -2,6 +2,7 @@ test_description='bisect can handle submodules' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-submodule-update.sh diff --git a/t/t6438-submodule-directory-file-conflicts.sh b/t/t6438-submodule-directory-file-conflicts.sh index 8df67a0ef9..3594190af8 100755 --- a/t/t6438-submodule-directory-file-conflicts.sh +++ b/t/t6438-submodule-directory-file-conflicts.sh @@ -2,6 +2,7 @@ test_description='merge can handle submodules' +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh . "$TEST_DIRECTORY"/lib-submodule-update.sh
-- 2.45.1.216.g4365c6fcf9.dirty