Re: Memory leak with curl_multi_socket_action

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?

> 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
>
> -------------------------------------------------------------------
> Unsubscribe: https://cool.haxx.se/list/listinfo/curl-library
> Etiquette: https://curl.haxx.se/mail/etiquette.html
>

-------------------------------------------------------------------
Unsubscribe: https://cool.haxx.se/list/listinfo/curl-library
Etiquette: https://curl.haxx.se/mail/etiquette.html
Received on 2020-05-24