git/t/t3424-rebase-empty.sh
Patrick Steinhardt 63c9bd372e commit: fix leaking parents when calling commit_tree_extended()
When creating commits via `commit_tree_extended()`, the caller passes in
a string list of parents. This call implicitly transfers ownership of
that list to the function, which is quite surprising to begin with. But
to make matters worse, `commit_tree_extended()` doesn't even bother to
free the list of parents in error cases. The result is a memory leak,
and one that the caller cannot fix by themselves because they do not
know whether parts of the string list have already been released.

Refactor the code such that callers can keep ownership of the list of
parents, which is getting indicated by parameter being a constant
pointer now. Free the lists at the calling site and add a common exit
path to those sites as required.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-11 13:15:07 -07:00

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#!/bin/sh
test_description='git rebase of commits that start or become empty'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success 'setup test repository' '
test_write_lines 1 2 3 4 5 6 7 8 9 10 >numbers &&
test_write_lines A B C D E F G H I J >letters &&
git add numbers letters &&
git commit -m A &&
git branch upstream &&
git branch localmods &&
git checkout upstream &&
test_write_lines A B C D E >letters &&
git add letters &&
git commit -m B &&
test_write_lines 1 2 3 4 five 6 7 8 9 ten >numbers &&
git add numbers &&
git commit -m C &&
git checkout localmods &&
test_write_lines 1 2 3 4 five 6 7 8 9 10 >numbers &&
git add numbers &&
git commit -m C2 &&
git commit --allow-empty -m D &&
test_write_lines A B C D E >letters &&
git add letters &&
git commit -m "Five letters ought to be enough for anybody"
'
test_expect_failure 'rebase (apply-backend)' '
test_when_finished "git rebase --abort" &&
git checkout -B testing localmods &&
# rebase (--apply) should not drop commits that start empty
git rebase --apply upstream &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=drop' '
git checkout -B testing localmods &&
git rebase --merge --empty=drop upstream &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge uses default of --empty=drop' '
git checkout -B testing localmods &&
git rebase --merge upstream &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=keep' '
git checkout -B testing localmods &&
git rebase --merge --empty=keep upstream &&
test_write_lines D C2 C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=stop' '
git checkout -B testing localmods &&
test_must_fail git rebase --merge --empty=stop upstream &&
git rebase --skip &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=ask' '
git checkout -B testing localmods &&
test_must_fail git rebase --merge --empty=ask upstream &&
git rebase --skip &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --interactive --empty=drop' '
git checkout -B testing localmods &&
git rebase --interactive --empty=drop upstream &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --interactive --empty=keep' '
git checkout -B testing localmods &&
git rebase --interactive --empty=keep upstream &&
test_write_lines D C2 C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --interactive --empty=stop' '
git checkout -B testing localmods &&
test_must_fail git rebase --interactive --empty=stop upstream &&
git rebase --skip &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --interactive uses default of --empty=stop' '
git checkout -B testing localmods &&
test_must_fail git rebase --interactive upstream &&
git rebase --skip &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=drop --keep-empty' '
git checkout -B testing localmods &&
git rebase --merge --empty=drop --keep-empty upstream &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=drop --no-keep-empty' '
git checkout -B testing localmods &&
git rebase --merge --empty=drop --no-keep-empty upstream &&
test_write_lines C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=keep --keep-empty' '
git checkout -B testing localmods &&
git rebase --merge --empty=keep --keep-empty upstream &&
test_write_lines D C2 C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge --empty=keep --no-keep-empty' '
git checkout -B testing localmods &&
git rebase --merge --empty=keep --no-keep-empty upstream &&
test_write_lines C2 C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --merge does not leave state laying around' '
git checkout -B testing localmods~2 &&
git rebase --merge upstream &&
test_path_is_missing .git/CHERRY_PICK_HEAD &&
test_path_is_missing .git/MERGE_MSG
'
test_expect_success 'rebase --exec --empty=drop' '
git checkout -B testing localmods &&
git rebase --exec "true" --empty=drop upstream &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --exec --empty=keep' '
git checkout -B testing localmods &&
git rebase --exec "true" --empty=keep upstream &&
test_write_lines D C2 C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --exec uses default of --empty=keep' '
git checkout -B testing localmods &&
git rebase --exec "true" upstream &&
test_write_lines D C2 C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'rebase --exec --empty=stop' '
git checkout -B testing localmods &&
test_must_fail git rebase --exec "true" --empty=stop upstream &&
git rebase --skip &&
test_write_lines D C B A >expect &&
git log --format=%s >actual &&
test_cmp expect actual
'
test_done