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a52f07afcb
Extend the the release_revisions() function so that it frees the "mailmap" in the "struct rev_info". The log family of functions now calls the clear_mailmap() function added in fa8afd18e5a (revisions API: provide and use a release_revisions(), 2021-09-19), allowing us to whitelist some tests with "TEST_PASSES_SANITIZE_LEAK=true". Unfortunately having a pointer to a mailmap in "struct rev_info" instead of an embedded member that we "own" get a bit messy, as can be seen in the change to builtin/commit.c. When we free() this data we won't be able to tell apart a pointer to a "mailmap" on the heap from one on the stack. As seen inea57bc0d41(log: add --use-mailmap option, 2013-01-05) the "log" family allocates it on the heap, but in the find_author_by_nickname() code added inea16794e43(commit: search author pattern against mailmap, 2013-08-23) we allocated it on the stack instead. Ideally we'd simply change that member to a "struct string_list mailmap" and never free() the "mailmap" itself, but that would be a much larger change to the revisions API. We have code that needs to hand an existing "mailmap" to a "struct rev_info", while we could change all of that, let's not go there now. The complexity isn't in the ownership of the "mailmap" per-se, but that various things assume a "rev_info.mailmap == NULL" means "doesn't want mailmap", if we changed that to an init'd "struct string_list we'd need to carefully refactor things to change those assumptions. Let's instead always free() it, and simply declare that if you add such a "mailmap" it must be allocated on the heap. Any modern libc will correctly panic if we free() a stack variable, so this should be safe going forward. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
56 lines
1.4 KiB
Bash
Executable file
56 lines
1.4 KiB
Bash
Executable file
#!/bin/sh
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test_description='filter-branch removal of trees with null sha1'
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. ./test-lib.sh
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test_expect_success 'setup: base commits' '
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test_commit one &&
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test_commit two &&
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test_commit three
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'
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test_expect_success 'setup: a commit with a bogus null sha1 in the tree' '
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{
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git ls-tree HEAD &&
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printf "160000 commit $ZERO_OID\\tbroken\\n"
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} >broken-tree &&
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echo "add broken entry" >msg &&
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tree=$(git mktree <broken-tree) &&
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test_tick &&
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commit=$(git commit-tree $tree -p HEAD <msg) &&
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git update-ref HEAD "$commit"
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'
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# we have to make one more commit on top removing the broken
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# entry, since otherwise our index does not match HEAD (and filter-branch will
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# complain). We could make the index match HEAD, but doing so would involve
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# writing a null sha1 into the index.
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test_expect_success 'setup: bring HEAD and index in sync' '
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test_tick &&
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git commit -a -m "back to normal"
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'
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test_expect_success 'noop filter-branch complains' '
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test_must_fail git filter-branch \
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--force --prune-empty \
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--index-filter "true"
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'
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test_expect_success 'filter commands are still checked' '
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test_must_fail git filter-branch \
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--force --prune-empty \
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--index-filter "git rm --cached --ignore-unmatch three.t"
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'
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test_expect_success 'removing the broken entry works' '
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echo three >expect &&
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git filter-branch \
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--force --prune-empty \
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--index-filter "git rm --cached --ignore-unmatch broken" &&
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git log -1 --format=%s >actual &&
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test_cmp expect actual
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'
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test_done
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