Re: Memory leak with curl_multi_socket_action

On Sun, May 24, 2020 at 1:02 PM Aleksandar Lazic <al-curllibrary_at_none.at>
wrote:

> Hi.
>
> On 24.05.20 02:44, James Read via curl-library wrote:
> > Valgrind reports a memory leak in my web crawler:
> >
> > ==36126== 923,440 bytes in 485 blocks are possibly lost in loss record
> 56 of 56
> > ==36126== at 0x483DD99: calloc (in
> /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
> > ==36126== by 0x4896414: ??? (in
> /usr/lib/x86_64-linux-gnu/libcurl.so.4.6.0)
> > ==36126== by 0x48AAA2E: ??? (in
> /usr/lib/x86_64-linux-gnu/libcurl.so.4.6.0)
> > ==36126== by 0x48ABB1B: ??? (in
> /usr/lib/x86_64-linux-gnu/libcurl.so.4.6.0)
> > ==36126== by 0x48ABCB7: curl_multi_socket_action (in
> /usr/lib/x86_64-linux-gnu/libcurl.so.4.6.0)
> > ==36126== by 0x10C667: event_cb (crawler.c:188)
> > ==36126== by 0x10D78F: crawler_init (crawler.c:555)
> > ==36126== by 0x49E0608: start_thread (pthread_create.c:477)
> > ==36126== by 0x4B41102: clone (clone.S:95)
>
>
> Which version of libcurl do you use?
>
>
7.68.0

> > here is my event_cb function:
> >
> > static void
> > event_cb(GlobalInfo *g, int fd, int revents)
> > {
> > CURLMcode rc;
> > struct itimerspec its;
> >
> > int action = ((revents & EPOLLIN) ? CURL_CSELECT_IN : 0) |
> > ((revents & EPOLLOUT) ?
> CURL_CSELECT_OUT : 0);
> >
> > rc = curl_multi_socket_action(g->multi, fd, action,
> &g->still_running);
> > mcode_or_die("event_cb: curl_multi_socket_action", rc);
> >
> > check_multi_info(g);
> >
> > if (g->still_running <= 0) {
> > //fprintf(MSG_OUT, "last transfer done, kill timeout\n");
> > memset(&its, 0, sizeof(struct itimerspec));
> > timerfd_settime(g->tfd, 0, &its, NULL);
> > }
> > }
> >
> > What is memory being allocated for? What do I need to free? Is this a
> bug in curl or is something wrong at my end?
> >
> > Thanks
> > James Read
> >
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>
>

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Received on 2020-05-24