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[35.203.137.187]) by smtp.gmail.com with ESMTPSA id bg8-20020a1709028e8800b001a96d295f15sm2177585plb.284.2023.05.05.14.19.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 May 2023 14:19:19 -0700 (PDT) Sender: Junio C Hamano From: Junio C Hamano To: git@vger.kernel.org Subject: [PATCH 2/2] diff: plug leaks in dirstat Date: Fri, 5 May 2023 14:19:17 -0700 Message-ID: <20230505211917.2746751-3-gitster@pobox.com> X-Mailer: git-send-email 2.40.1-476-g69c786637d In-Reply-To: <20230505211917.2746751-1-gitster@pobox.com> References: <20230505165952.335256-1-gitster@pobox.com> <20230505211917.2746751-1-gitster@pobox.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org The array of dirstat_file contained in the dirstat_dir structure is not freed after the processing ends. Unfortunately, the member that points at the array, .files, is incremented as the gather_dirstat() function recursively walks it, and this needs to be plugged by remembering the beginning of the array before gather_dirstat() mucks with it and freeing it after we are done. We can mark t4047 as leak-free. t4000, which is marked as leak-free, now can exercise dirstat in it, which will happen next. Signed-off-by: Junio C Hamano --- diff.c | 17 +++++++++++------ t/t4047-diff-dirstat.sh | 2 ++ 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/diff.c b/diff.c index e13d0f8b67..d52db685f7 100644 --- a/diff.c +++ b/diff.c @@ -2975,13 +2975,18 @@ static void conclude_dirstat(struct diff_options *options, struct dirstat_dir *dir, unsigned long changed) { - /* This can happen even with many files, if everything was renames */ - if (!changed) - return; + struct dirstat_file *to_free = dir->files; + + if (!changed) { + /* This can happen even with many files, if everything was renames */ + ; + } else { + /* Show all directories with more than x% of the changes */ + QSORT(dir->files, dir->nr, dirstat_compare); + gather_dirstat(options, dir, changed, "", 0); + } - /* Show all directories with more than x% of the changes */ - QSORT(dir->files, dir->nr, dirstat_compare); - gather_dirstat(options, dir, changed, "", 0); + free(to_free); } static void show_dirstat(struct diff_options *options) diff --git a/t/t4047-diff-dirstat.sh b/t/t4047-diff-dirstat.sh index 7fec2cb9cd..70224c3da1 100755 --- a/t/t4047-diff-dirstat.sh +++ b/t/t4047-diff-dirstat.sh @@ -1,6 +1,8 @@ #!/bin/sh test_description='diff --dirstat tests' + +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # set up two commits where the second commit has these files