revisions API: have release_revisions() release "cmdline"

Extend the the release_revisions() function so that it frees the
"cmdline" in the "struct rev_info". This in combination with a
preceding change to free "commits" and "mailmap" means that we can
whitelist another test under "TEST_PASSES_SANITIZE_LEAK=true".

There was a proposal in [1] to do away with xstrdup()-ing this
add_rev_cmdline(), perhaps that would be worthwhile, but for now let's
just free() it.

We could also make that a "char *" in "struct rev_cmdline_entry"
itself, but since we own it let's expose it as a constant to outside
callers. I proposed that in [2] but have since changed my mind. See
14d30cdfc0 (ref-filter: fix memory leak in `free_array_item()`,
2019-07-10), c514c62a4f (checkout: fix leak of non-existent branch
names, 2020-08-14) and other log history hits for "free((char *)" for
prior art.

This includes the tests we had false-positive passes on before my
6798b08e84 (perl Git.pm: don't ignore signalled failure in
_cmd_close(), 2022-02-01), now they pass for real.

Since there are 66 tests matching t/t[0-9]*git-svn*.sh it's easier to
list those that don't pass than to touch most of those 66. So let's
introduce a "TEST_FAILS_SANITIZE_LEAK=true", which if set in the tests
won't cause lib-git-svn.sh to set "TEST_PASSES_SANITIZE_LEAK=true.

This change also marks all the tests that we removed
"TEST_FAILS_SANITIZE_LEAK=true" from in an earlier commit due to
removing the UNLEAK() from cmd_format_patch(), we can now assert that
its API use doesn't leak any "struct rev_info" memory.

This change also made commit "t5503-tagfollow.sh" pass on current
master, but that would regress when combined with
ps/fetch-atomic-fixup's de004e848a (t5503: simplify setup of test
which exercises failure of backfill, 2022-03-03) (through no fault of
that topic, that change started using "git clone" in the test, which
has an outstanding leak). Let's leave that test out for now to avoid
in-flight semantic conflicts.

1. https://lore.kernel.org/git/YUj%2FgFRh6pwrZalY@carlos-mbp.lan/
2. https://lore.kernel.org/git/87o88obkb1.fsf@evledraar.gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

revision.c

@@ -2926,6 +2926,15 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
 	return left;
 }
 
+static void release_revisions_cmdline(struct rev_cmdline_info *cmdline)
+{
+	unsigned int i;
+
+	for (i = 0; i < cmdline->nr; i++)
+		free((char *)cmdline->rev[i].name);
+	free(cmdline->rev);
+}
+
 static void release_revisions_mailmap(struct string_list *mailmap)
 {
 	if (!mailmap)
@@ -2938,6 +2947,7 @@ void release_revisions(struct rev_info *revs)
 {
 	free_commit_list(revs->commits);
 	object_array_clear(&revs->pending);
+	release_revisions_cmdline(&revs->cmdline);
 	release_revisions_mailmap(revs->mailmap);
 }
 

t/lib-git-svn.sh

@@ -1,3 +1,7 @@
+if test -z "$TEST_FAILS_SANITIZE_LEAK"
+then
+	TEST_PASSES_SANITIZE_LEAK=true
+fi
 . ./test-lib.sh
 
 if test -n "$NO_SVN_TESTS"

t/t0062-revision-walking.sh

@@ -5,6 +5,7 @@
 
 test_description='Test revision walking api'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 cat >run_twice_expected <<-EOF

t/t0101-at-syntax.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='various @{whatever} syntax tests'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t1060-object-corruption.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
 test_description='see how we handle various forms of corruption'
+
 . ./test-lib.sh
 
 # convert "1234abcd" to ".git/objects/12/34abcd"

t/t3303-notes-subtrees.sh

@@ -5,6 +5,7 @@ test_description='Test commit notes organized in subtrees'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 number_of_commits=100

t/t3305-notes-fanout.sh

@@ -2,6 +2,7 @@
 
 test_description='Test that adding/removing many notes triggers automatic fanout restructuring'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 path_has_fanout() {

t/t3408-rebase-multi-line.sh

@@ -5,6 +5,7 @@ test_description='rebasing a commit with multi-line first paragraph.'
 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 '

t/t4027-diff-submodule.sh

@@ -2,6 +2,7 @@
 
 test_description='difference in submodules'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-diff.sh
 

t/t4128-apply-root.sh

@@ -2,6 +2,7 @@
 
 test_description='apply same filename'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t4212-log-corrupt.sh

@@ -2,6 +2,7 @@
 
 test_description='git log with invalid commit headers'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t5515-fetch-merge-logic.sh

@@ -14,6 +14,7 @@ export GIT_TEST_PROTOCOL_VERSION
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 build_script () {

t/t5518-fetch-exit-status.sh

@@ -8,6 +8,7 @@ test_description='fetch exit status test'
 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 '

t/t6002-rev-list-bisect.sh

@@ -4,6 +4,7 @@
 #
 test_description='Tests git rev-list --bisect functionality'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-t6000.sh # t6xxx specific functions
 

t/t6003-rev-list-topo-order.sh

@@ -5,6 +5,7 @@
 
 test_description='Tests git rev-list --topo-order functionality'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-t6000.sh # t6xxx specific functions
 

t/t6005-rev-list-count.sh

@@ -2,6 +2,7 @@
 
 test_description='git rev-list --max-count and --skip test'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '

t/t6018-rev-list-glob.sh

@@ -5,6 +5,7 @@ test_description='rev-list/rev-parse --glob'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 commit () {

t/t6100-rev-list-in-order.sh

@@ -2,6 +2,7 @@
 
 test_description='rev-list testing in-commit-order'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup a commit history with trees, blobs' '

t/t9100-git-svn-basic.sh

@@ -8,6 +8,7 @@ test_description='git svn basic tests'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 prepare_utf8_locale

t/t9101-git-svn-props.sh

@@ -4,6 +4,8 @@
 #
 
 test_description='git svn property tests'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 mkdir import

t/t9104-git-svn-follow-parent.sh

@@ -4,6 +4,8 @@
 #
 
 test_description='git svn fetching'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'initialize repo' '

t/t9106-git-svn-commit-diff-clobber.sh

@@ -2,6 +2,8 @@
 #
 # Copyright (c) 2006 Eric Wong
 test_description='git svn commit-diff clobber'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'initialize repo' '

t/t9115-git-svn-dcommit-funky-renames.sh

@@ -5,6 +5,7 @@
 
 test_description='git svn dcommit can commit renames of files with ugly names'
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'load repository with strange names' '

t/t9116-git-svn-log.sh

@@ -4,6 +4,8 @@
 #
 
 test_description='git svn log tests'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'setup repository and import' '

t/t9122-git-svn-author.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='git svn authorship'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'setup svn repository' '

t/t9127-git-svn-partial-rebuild.sh

@@ -4,6 +4,8 @@
 #
 
 test_description='git svn partial-rebuild tests'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'initialize svnrepo' '

t/t9129-git-svn-i18n-commitencoding.sh

@@ -4,6 +4,7 @@
 
 test_description='git svn honors i18n.commitEncoding in config'
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 compare_git_head_with () {

t/t9132-git-svn-broken-symlink.sh

@@ -2,6 +2,7 @@
 
 test_description='test that git handles an svn repository with empty symlinks'
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 test_expect_success 'load svn dumpfile' '
 	svnadmin load "$rawsvnrepo" <<EOF

t/t9139-git-svn-non-utf8-commitencoding.sh

@@ -4,6 +4,7 @@
 
 test_description='git svn refuses to dcommit non-UTF8 messages'
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 # ISO-2022-JP can pass for valid UTF-8, so skipping that in this test

t/t9146-git-svn-empty-dirs.sh

@@ -3,6 +3,8 @@
 # Copyright (c) 2009 Eric Wong
 
 test_description='git svn creates empty directories'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'initialize repo' '

t/t9148-git-svn-propset.sh

@@ -5,6 +5,7 @@
 
 test_description='git svn propset tests'
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'setup propset via import' '

t/t9151-svn-mergeinfo.sh

@@ -5,6 +5,7 @@
 
 test_description='git-svn svn mergeinfo properties'
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'load svn dump' "

t/t9160-git-svn-preserve-empty-dirs.sh

@@ -9,6 +9,7 @@ This test uses git to clone a Subversion repository that contains empty
 directories, and checks that corresponding directories are created in the
 local Git repository with placeholder files.'
 
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 GIT_REPO=git-svn-repo

t/t9162-git-svn-dcommit-interactive.sh

@@ -3,6 +3,8 @@
 # Copyright (c) 2011 Frédéric Heitzmann
 
 test_description='git svn dcommit --interactive series'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 test_expect_success 'initialize repo' '

t/t9164-git-svn-dcommit-concurrent.sh

@@ -4,6 +4,8 @@
 #
 
 test_description='concurrent git svn dcommit'
+
+TEST_FAILS_SANITIZE_LEAK=true
 . ./lib-git-svn.sh
 
 

t/t9501-gitweb-standalone-http-status.sh

@@ -13,6 +13,7 @@ code and message.'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./lib-gitweb.sh
 
 #