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Ævar Arnfjörð Bjarmason 03267e8656 commit: discard partial cache before (re-)reading it
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 in 11c8a74a64 (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 in
7168624c35 (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>
2022-11-21 12:32:48 +09:00

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#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='git ls-files -k and -m flags test.
This test prepares the following in the cache:
path0 - a file
path1 - a symlink
path2/file2 - a file in a directory
path3/file3 - a file in a directory
pathx/ju - a file in a directory
submod1/ - a submodule
submod2/ - another submodule
and the following on the filesystem:
path0/file0 - a file in a directory
path1/file1 - a file in a directory
path2 - a file
path3 - a symlink
path4 - a file
path5 - a symlink
path6/file6 - a file in a directory
pathx/ju/nk - a file in a directory to be killed
submod1/ - a submodule (modified from the cache)
submod2/ - a submodule (matches the cache)
git ls-files -k should report that existing filesystem objects
path0/*, path1/*, path2 and path3 to be killed.
Also for modification test, the cache and working tree have:
path7 - an empty file, modified to a non-empty file.
path8 - a non-empty file, modified to an empty file.
path9 - an empty file, cache dirtied.
path10 - a non-empty file, cache dirtied.
We should report path0, path1, path2/file2, path3/file3, path7 and path8
modified without reporting path9 and path10. submod1 is also modified.
'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success 'git update-index --add to add various paths.' '
date >path0 &&
test_ln_s_add xyzzy path1 &&
mkdir path2 path3 pathx &&
date >path2/file2 &&
date >path3/file3 &&
>pathx/ju &&
: >path7 &&
date >path8 &&
: >path9 &&
date >path10 &&
git update-index --add -- path0 path?/file? pathx/ju path7 path8 path9 path10 &&
git init submod1 &&
git -C submod1 commit --allow-empty -m "empty 1" &&
git init submod2 &&
git -C submod2 commit --allow-empty -m "empty 2" &&
git update-index --add submod[12] &&
(
cd submod1 &&
git commit --allow-empty -m "empty 1 (updated)"
) &&
rm -fr path? # leave path10 alone
'
test_expect_success 'git ls-files -k to show killed files.' '
date >path2 &&
if test_have_prereq SYMLINKS
then
ln -s frotz path3 &&
ln -s nitfol path5
else
date >path3 &&
date >path5
fi &&
mkdir -p path0 path1 path6 pathx/ju &&
date >path0/file0 &&
date >path1/file1 &&
date >path6/file6 &&
date >path7 &&
: >path8 &&
: >path9 &&
touch path10 &&
>pathx/ju/nk &&
cat >.expected <<-\EOF
path0/file0
path1/file1
path2
path3
pathx/ju/nk
EOF
'
test_expect_success 'git ls-files -k output (w/o icase)' '
git ls-files -k >.output &&
test_cmp .expected .output
'
test_expect_success 'git ls-files -k output (w/ icase)' '
git -c core.ignorecase=true ls-files -k >.output &&
test_cmp .expected .output
'
test_expect_success 'git ls-files -m to show modified files.' '
git ls-files -m >.output
'
test_expect_success 'validate git ls-files -m output.' '
cat >.expected <<-\EOF &&
path0
path1
path2/file2
path3/file3
path7
path8
pathx/ju
submod1
EOF
test_cmp .expected .output
'
test_done