ev_loop_destroy memory leak

[Marc Lehmann]

On Tue, Dec 28, 2010 at 10:35:02AM -0400, Juan Pablo L <jpablolorenzetti at gmail.com> wrote:
> Hi, i m trying to build an application using libev for the first time, this
> application was written with glib but i m trying to change it into libev, i
> have 1 issue and 1 question: the following code gives memory leaks at
> ev_loop_destroy according to valgrind:

Please check the libev documentation
(http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#VALGRIND).

In short, this is not a leak, it's simply a bug in valgrind.

> ==13453== 0 bytes in 1 blocks are definitely lost in loss record 5 of 38

Also, if you read the message in english: "no bytes were definitely
lost...".

> and also gives 9 errors (which are the 9 memory leaks) even thou it says 0
> bytes was lost. so i have never seen this kind of reports before.

If it bothers you you could report it against valgrind (pointing out to
them that posix requires realloc (ptr, 0) to be the same as free, and that
valgrind should either implement a posix-compliant mode or possibly point
out that this is not a memory leak on any posix system (or even existing
clones) with a better message).

Valgrind not correctly implementing realloc and poll are known issues with
it currently.

> Also, i would like to know, why if i do not do an ev_unref after
> statrting the watcher i get a segmentation fault when i stop the
> application ? thanks!!!!

I don't know, using threads is difficult and the program doesn't even
link! Have you tried debugging it? It's very unlikely that it has anything
to do with ev_unref or libev, except that it might actually let your
program continue running.

I would check if you access the loop in different threads without locking
(except for ev_async_send). For example, are you sure you leave ev_run
before calling ev_loop_destroy?

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