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03267e8656
The read_cache() in prepare_to_commit() would end up clobbering the pointer we had for a previously populated "the_index.cache_tree" in the very common case of "git commit" stressed by e.g. the tests being changed here. We'd populate "the_index.cache_tree" by calling "update_main_cache_tree" in prepare_index(), but would not end up with a "fully prepared" index. What constitutes an existing index is clearly overly fuzzy, here we'll check "active_nr" (aka "the_index.cache_nr"), but our "the_index.cache_tree" might have been malloc()'d already. Thus the code added in11c8a74a64(commit: write cache-tree data when writing index anyway, 2011-12-06) would end up allocating the "cache_tree", and would interact here with code added in7168624c35(Do not generate full commit log message if it is not going to be used, 2007-11-28). The result was a very common memory leak. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Taylor Blau <me@ttaylorr.com>
119 lines
3.5 KiB
Bash
Executable file
119 lines
3.5 KiB
Bash
Executable file
#!/bin/sh
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test_description='avoid rewriting packed-refs unnecessarily'
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TEST_PASSES_SANITIZE_LEAK=true
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. ./test-lib.sh
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# Add an identifying mark to the packed-refs file header line. This
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# shouldn't upset readers, and it should be omitted if the file is
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# ever rewritten.
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mark_packed_refs () {
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sed -e "s/^\(#.*\)/\1 t1409 /" .git/packed-refs >.git/packed-refs.new &&
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mv .git/packed-refs.new .git/packed-refs
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}
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# Verify that the packed-refs file is still marked.
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check_packed_refs_marked () {
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grep -q '^#.* t1409 ' .git/packed-refs
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}
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test_expect_success 'setup' '
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git commit --allow-empty -m "Commit A" &&
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A=$(git rev-parse HEAD) &&
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git commit --allow-empty -m "Commit B" &&
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B=$(git rev-parse HEAD) &&
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git commit --allow-empty -m "Commit C" &&
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C=$(git rev-parse HEAD)
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'
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test_expect_success 'do not create packed-refs file gratuitously' '
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test_path_is_missing .git/packed-refs &&
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git update-ref refs/heads/foo $A &&
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test_path_is_missing .git/packed-refs &&
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git update-ref refs/heads/foo $B &&
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test_path_is_missing .git/packed-refs &&
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git update-ref refs/heads/foo $C $B &&
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test_path_is_missing .git/packed-refs &&
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git update-ref -d refs/heads/foo &&
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test_path_is_missing .git/packed-refs
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'
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test_expect_success 'check that marking the packed-refs file works' '
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git for-each-ref >expected &&
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git pack-refs --all &&
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mark_packed_refs &&
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check_packed_refs_marked &&
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git for-each-ref >actual &&
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test_cmp expected actual &&
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git pack-refs --all &&
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! check_packed_refs_marked &&
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git for-each-ref >actual2 &&
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test_cmp expected actual2
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'
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test_expect_success 'leave packed-refs untouched on update of packed' '
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git update-ref refs/heads/packed-update $A &&
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git pack-refs --all &&
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mark_packed_refs &&
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git update-ref refs/heads/packed-update $B &&
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check_packed_refs_marked
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'
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test_expect_success 'leave packed-refs untouched on checked update of packed' '
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git update-ref refs/heads/packed-checked-update $A &&
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git pack-refs --all &&
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mark_packed_refs &&
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git update-ref refs/heads/packed-checked-update $B $A &&
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check_packed_refs_marked
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'
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test_expect_success 'leave packed-refs untouched on verify of packed' '
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git update-ref refs/heads/packed-verify $A &&
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git pack-refs --all &&
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mark_packed_refs &&
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echo "verify refs/heads/packed-verify $A" | git update-ref --stdin &&
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check_packed_refs_marked
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'
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test_expect_success 'touch packed-refs on delete of packed' '
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git update-ref refs/heads/packed-delete $A &&
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git pack-refs --all &&
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mark_packed_refs &&
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git update-ref -d refs/heads/packed-delete &&
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! check_packed_refs_marked
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'
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test_expect_success 'leave packed-refs untouched on update of loose' '
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git pack-refs --all &&
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git update-ref refs/heads/loose-update $A &&
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mark_packed_refs &&
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git update-ref refs/heads/loose-update $B &&
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check_packed_refs_marked
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'
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test_expect_success 'leave packed-refs untouched on checked update of loose' '
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git pack-refs --all &&
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git update-ref refs/heads/loose-checked-update $A &&
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mark_packed_refs &&
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git update-ref refs/heads/loose-checked-update $B $A &&
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check_packed_refs_marked
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'
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test_expect_success 'leave packed-refs untouched on verify of loose' '
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git pack-refs --all &&
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git update-ref refs/heads/loose-verify $A &&
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mark_packed_refs &&
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echo "verify refs/heads/loose-verify $A" | git update-ref --stdin &&
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check_packed_refs_marked
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'
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test_expect_success 'leave packed-refs untouched on delete of loose' '
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git pack-refs --all &&
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git update-ref refs/heads/loose-delete $A &&
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mark_packed_refs &&
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git update-ref -d refs/heads/loose-delete &&
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check_packed_refs_marked
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'
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test_done
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