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In a subsequent commit I'll be replacing most of this code to log N parents, but let's first fix bugs introduced in the recent 2f732bf15e6 (tr2: log parent process name, 2021-07-21). It was using the strbuf_read_file() in the wrong way, its return value is either a length or a negative value on error. If we didn't have a procfs, or otherwise couldn't access it we'd end up pushing an empty string to the trace2 ancestry array. It was also using the strvec_push() API the wrong way. That API always does an xstrdup(), so by detaching the strbuf here we'd leak memory. Let's instead pass in our pointer for strvec_push() to xstrdup(), and then free our own strbuf. I do have some WIP changes to make strvec_push_nodup() non-static, which makes this and some other callsites nicer, but let's just follow the prevailing pattern of using strvec_push() for now. We'll also need to free that "procfs_path" strbuf whether or not strbuf_read_file() succeeds, which was another source of memory leaks in 2f732bf15e6, i.e. we'd leak that memory as well if we weren't on a system where we could read the file from procfs. Let's move all the freeing of the memory to the end of the function. If we're still at STRBUF_INIT with "name" due to not having taken the branch where the strbuf_read_file() succeeds freeing it is redundant. So we could move it into the body of the "if", but just handling freeing the same way for all branches of the function makes it more readable. In combination with the preceding commit this makes all of t[0-9]*trace2*.sh pass under SANITIZE=leak on Linux. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Acked-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git - fast, scalable, distributed revision control system
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.
Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
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See Documentation/gittutorial.txt to get started, then see
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If git has been correctly installed, then the tutorial can also be
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(man gitcvs-migration or git help cvs-migration if git is
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- random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks