The Tor Browser: ipc/chromium/src/third_party/libevent-avoid-empty-sighandler.patch@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 diff --git a/ipc/chromium/src/third_party/libevent/kqueue.c b/ipc/chromium/src/third_party/libevent/kqueue.c

     2 --- a/ipc/chromium/src/third_party/libevent/kqueue.c

     3 +++ b/ipc/chromium/src/third_party/libevent/kqueue.c

     4 @@ -158,26 +158,20 @@ kq_init(struct event_base *base)

     5  	base->evsigsel = &kqsigops;

     7  	return (kqueueop);

     8  err:

     9  	if (kqueueop)

    10  		kqop_free(kqueueop);

    12  	return (NULL);

    13  }

    15 -static void

    16 -kq_sighandler(int sig)

    17 -{

    18 -	/* Do nothing here */

    19 -}

    20 -

    21  #define ADD_UDATA 0x30303

    23  static void

    24  kq_setup_kevent(struct kevent *out, evutil_socket_t fd, int filter, short change)

    25  {

    26  	memset(out, 0, sizeof(struct kevent));

    27  	out->ident = fd;

    28  	out->filter = filter;

    30  	if (change & EV_CHANGE_ADD) {

    31 @@ -431,24 +425,31 @@ kq_sig_add(struct event_base *base, int

    32  	kev.ident = nsignal;

    33  	kev.filter = EVFILT_SIGNAL;

    34  	kev.flags = EV_ADD;

    36  	/* Be ready for the signal if it is sent any

    37  	 * time between now and the next call to

    38  	 * kq_dispatch. */

    39  	if (kevent(kqop->kq, &kev, 1, NULL, 0, &timeout) == -1)

    40  		return (-1);

    42 -	/* XXXX The manpage suggest we could use SIG_IGN instead of a

    43 -	 * do-nothing handler */

    44 -	if (_evsig_set_handler(base, nsignal, kq_sighandler) == -1)

    45 +	/* Backported from

    46 +	 * https://github.com/nmathewson/Libevent/commit/148458e0a1fd25e167aa2ef229d1c9a70b27c3e9 */

    47 +	/* We can set the handler for most signals to SIG_IGN and

    48 +	 * still have them reported to us in the queue.  However,

    49 +	 * if the handler for SIGCHLD is SIG_IGN, the system reaps

    50 +	 * zombie processes for us, and we don't get any notification.

    51 +	 * This appears to be the only signal with this quirk. */

    52 +	if (_evsig_set_handler(base, nsignal,

    53 +	                       nsignal == SIGCHLD ? SIG_DFL : SIG_IGN) == -1) {

    54  		return (-1);

    55 +	}

    57  	return (0);

    58  }

    60  static int

    61  kq_sig_del(struct event_base *base, int nsignal, short old, short events, void *p)

    62  {

    63  	struct kqop *kqop = base->evbase;

    64  	struct kevent kev;

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