The Tor Browser: ipc/chromium/src/third_party/libevent/test/regress

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

     1 /*

     2  * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  * 3. The name of the author may not be used to endorse or promote products

    13  *    derived from this software without specific prior written permission.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

    16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

    17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

    18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

    19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

    20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

    24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    25  */

    26 #include "../util-internal.h"

    27 #include "event2/event-config.h"

    29 #ifdef WIN32

    30 #include <winsock2.h>

    31 #endif

    32 #include <sys/types.h>

    33 #include <sys/stat.h>

    34 #ifdef _EVENT_HAVE_SYS_SOCKET_H

    35 #include <sys/socket.h>

    36 #endif

    37 #include <fcntl.h>

    38 #include <stdlib.h>

    39 #include <stdio.h>

    40 #include <string.h>

    41 #ifndef WIN32

    42 #include <sys/time.h>

    43 #include <unistd.h>

    44 #endif

    45 #include <errno.h>

    47 #include "event2/event.h"

    48 #include "event2/util.h"

    50 #include "regress.h"

    52 static int was_et = 0;

    54 static void

    55 read_cb(evutil_socket_t fd, short event, void *arg)

    56 {

    57 	char buf;

    58 	int len;

    60 	len = recv(fd, &buf, sizeof(buf), 0);

    62 	called++;

    63 	if (event & EV_ET)

    64 		was_et = 1;

    66 	if (!len)

    67 		event_del(arg);

    68 }

    70 #ifndef SHUT_WR

    71 #define SHUT_WR 1

    72 #endif

    74 #ifdef WIN32

    75 #define LOCAL_SOCKETPAIR_AF AF_INET

    76 #else

    77 #define LOCAL_SOCKETPAIR_AF AF_UNIX

    78 #endif

    80 static void

    81 test_edgetriggered(void *et)

    82 {

    83 	struct event *ev = NULL;

    84 	struct event_base *base = NULL;

    85 	const char *test = "test string";

    86 	evutil_socket_t pair[2] = {-1,-1};

    87 	int supports_et;

    89 	/* On Linux 3.2.1 (at least, as patched by Fedora and tested by Nick),

    90 	 * doing a "recv" on an AF_UNIX socket resets the readability of the

    91 	 * socket, even though there is no state change, so we don't actually

    92 	 * get edge-triggered behavior.  Yuck!  Linux 3.1.9 didn't have this

    93 	 * problem.

    94 	 */

    95 #ifdef __linux__

    96 	if (evutil_ersatz_socketpair(AF_INET, SOCK_STREAM, 0, pair) == -1) {

    97 		tt_abort_perror("socketpair");

    98 	}

    99 #else

   100 	if (evutil_socketpair(LOCAL_SOCKETPAIR_AF, SOCK_STREAM, 0, pair) == -1) {

   101 		tt_abort_perror("socketpair");

   102 	}

   103 #endif

   105 	called = was_et = 0;

   107 	tt_int_op(send(pair[0], test, (int)strlen(test)+1, 0), >, 0);

   108 	shutdown(pair[0], SHUT_WR);

   110 	/* Initalize the event library */

   111 	base = event_base_new();

   113 	if (!strcmp(event_base_get_method(base), "epoll") ||

   114 	    !strcmp(event_base_get_method(base), "epoll (with changelist)") ||

   115 	    !strcmp(event_base_get_method(base), "kqueue"))

   116 		supports_et = 1;

   117 	else

   118 		supports_et = 0;

   120 	TT_BLATHER(("Checking for edge-triggered events with %s, which should %s"

   121 				"support edge-triggering", event_base_get_method(base),

   122 				supports_et?"":"not "));

   124 	/* Initalize one event */

   125 	ev = event_new(base, pair[1], EV_READ|EV_ET|EV_PERSIST, read_cb, &ev);

   127 	event_add(ev, NULL);

   129 	/* We're going to call the dispatch function twice.  The first invocation

   130 	 * will read a single byte from pair[1] in either case.  If we're edge

   131 	 * triggered, we'll only see the event once (since we only see transitions

   132 	 * from no data to data), so the second invocation of event_base_loop will

   133 	 * do nothing.  If we're level triggered, the second invocation of

   134 	 * event_base_loop will also activate the event (because there's still

   135 	 * data to read). */

   136 	event_base_loop(base,EVLOOP_NONBLOCK|EVLOOP_ONCE);

   137 	event_base_loop(base,EVLOOP_NONBLOCK|EVLOOP_ONCE);

   139 	if (supports_et) {

   140 		tt_int_op(called, ==, 1);

   141 		tt_assert(was_et);

   142 	} else {

   143 		tt_int_op(called, ==, 2);

   144 		tt_assert(!was_et);

   145 	}

   147  end:

   148 	if (ev) {

   149 		event_del(ev);

   150 		event_free(ev);

   151 	}

   152 	if (base)

   153 		event_base_free(base);

   154 	evutil_closesocket(pair[0]);

   155 	evutil_closesocket(pair[1]);

   156 }

   158 static void

   159 test_edgetriggered_mix_error(void *data_)

   160 {

   161 	struct basic_test_data *data = data_;

   162 	struct event_base *base = NULL;

   163 	struct event *ev_et=NULL, *ev_lt=NULL;

   165 #ifdef _EVENT_DISABLE_DEBUG_MODE

   166 	if (1)

   167 		tt_skip();

   168 #endif

   170 	event_enable_debug_mode();

   172 	base = event_base_new();

   174 	/* try mixing edge-triggered and level-triggered to make sure it fails*/

   175 	ev_et = event_new(base, data->pair[0], EV_READ|EV_ET, read_cb, ev_et);

   176 	tt_assert(ev_et);

   177 	ev_lt = event_new(base, data->pair[0], EV_READ, read_cb, ev_lt);

   178 	tt_assert(ev_lt);

   180 	/* Add edge-triggered, then level-triggered.  Get an error. */

   181 	tt_int_op(0, ==, event_add(ev_et, NULL));

   182 	tt_int_op(-1, ==, event_add(ev_lt, NULL));

   183 	tt_int_op(EV_READ, ==, event_pending(ev_et, EV_READ, NULL));

   184 	tt_int_op(0, ==, event_pending(ev_lt, EV_READ, NULL));

   186 	tt_int_op(0, ==, event_del(ev_et));

   187 	/* Add level-triggered, then edge-triggered.  Get an error. */

   188 	tt_int_op(0, ==, event_add(ev_lt, NULL));

   189 	tt_int_op(-1, ==, event_add(ev_et, NULL));

   190 	tt_int_op(EV_READ, ==, event_pending(ev_lt, EV_READ, NULL));

   191 	tt_int_op(0, ==, event_pending(ev_et, EV_READ, NULL));

   193 end:

   194 	if (ev_et)

   195 		event_free(ev_et);

   196 	if (ev_lt)

   197 		event_free(ev_lt);

   198 	if (base)

   199 		event_base_free(base);

   200 }

   202 struct testcase_t edgetriggered_testcases[] = {

   203 	{ "et", test_edgetriggered, TT_FORK, NULL, NULL },

   204 	{ "et_mix_error", test_edgetriggered_mix_error,

   205 	  TT_FORK|TT_NEED_SOCKETPAIR|TT_NO_LOGS, &basic_setup, NULL },

   206 	END_OF_TESTCASES

   207 };

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