Adding upstream version 1.0.18.upstream/1.0.18upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 590 insertions, 0 deletions

diff --git a/libevent/test/regress_thread.c b/libevent/test/regress_thread.c
new file mode 100644
index 0000000..1e0ce41
--- /dev/null
+++ b/libevent/test/regress_thread.c
@@ -0,0 +1,590 @@
+/*
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "util-internal.h"
+
+/* The old tests here need assertions to work. */
+#undef NDEBUG
+
+#include "event2/event-config.h"
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef EVENT__HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef EVENT__HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef EVENT__HAVE_PTHREADS
+#include <pthread.h>
+#elif defined(_WIN32)
+#include <process.h>
+#endif
+#include <assert.h>
+#ifdef EVENT__HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <time.h>
+
+#include "sys/queue.h"
+
+#include "event2/event.h"
+#include "event2/event_struct.h"
+#include "event2/thread.h"
+#include "event2/util.h"
+#include "evthread-internal.h"
+#include "event-internal.h"
+#include "defer-internal.h"
+#include "regress.h"
+#include "tinytest_macros.h"
+#include "time-internal.h"
+#include "regress_thread.h"
+
+struct cond_wait {
+	void *lock;
+	void *cond;
+};
+
+static void
+wake_all_timeout(evutil_socket_t fd, short what, void *arg)
+{
+	struct cond_wait *cw = arg;
+	EVLOCK_LOCK(cw->lock, 0);
+	EVTHREAD_COND_BROADCAST(cw->cond);
+	EVLOCK_UNLOCK(cw->lock, 0);
+
+}
+
+static void
+wake_one_timeout(evutil_socket_t fd, short what, void *arg)
+{
+	struct cond_wait *cw = arg;
+	EVLOCK_LOCK(cw->lock, 0);
+	EVTHREAD_COND_SIGNAL(cw->cond);
+	EVLOCK_UNLOCK(cw->lock, 0);
+}
+
+#define NUM_THREADS	100
+#define NUM_ITERATIONS  100
+void *count_lock;
+static int count;
+
+static THREAD_FN
+basic_thread(void *arg)
+{
+	struct cond_wait cw;
+	struct event_base *base = arg;
+	struct event ev;
+	int i = 0;
+
+	EVTHREAD_ALLOC_LOCK(cw.lock, 0);
+	EVTHREAD_ALLOC_COND(cw.cond);
+	assert(cw.lock);
+	assert(cw.cond);
+
+	evtimer_assign(&ev, base, wake_all_timeout, &cw);
+	for (i = 0; i < NUM_ITERATIONS; i++) {
+		struct timeval tv;
+		evutil_timerclear(&tv);
+		tv.tv_sec = 0;
+		tv.tv_usec = 3000;
+
+		EVLOCK_LOCK(cw.lock, 0);
+		/* we need to make sure that event does not happen before
+		 * we get to wait on the conditional variable */
+		assert(evtimer_add(&ev, &tv) == 0);
+
+		assert(EVTHREAD_COND_WAIT(cw.cond, cw.lock) == 0);
+		EVLOCK_UNLOCK(cw.lock, 0);
+
+		EVLOCK_LOCK(count_lock, 0);
+		++count;
+		EVLOCK_UNLOCK(count_lock, 0);
+	}
+
+	/* exit the loop only if all threads fired all timeouts */
+	EVLOCK_LOCK(count_lock, 0);
+	if (count >= NUM_THREADS * NUM_ITERATIONS)
+		event_base_loopexit(base, NULL);
+	EVLOCK_UNLOCK(count_lock, 0);
+
+	EVTHREAD_FREE_LOCK(cw.lock, 0);
+	EVTHREAD_FREE_COND(cw.cond);
+
+	THREAD_RETURN();
+}
+
+static int notification_fd_used = 0;
+#ifndef _WIN32
+static int got_sigchld = 0;
+static void
+sigchld_cb(evutil_socket_t fd, short event, void *arg)
+{
+	struct timeval tv;
+	struct event_base *base = arg;
+
+	got_sigchld++;
+	tv.tv_usec = 100000;
+	tv.tv_sec = 0;
+	event_base_loopexit(base, &tv);
+}
+
+
+static void
+notify_fd_cb(evutil_socket_t fd, short event, void *arg)
+{
+	++notification_fd_used;
+}
+#endif
+
+static void
+thread_basic(void *arg)
+{
+	THREAD_T threads[NUM_THREADS];
+	struct event ev;
+	struct timeval tv;
+	int i;
+	struct basic_test_data *data = arg;
+	struct event_base *base = data->base;
+
+	struct event *notification_event = NULL;
+	struct event *sigchld_event = NULL;
+
+	EVTHREAD_ALLOC_LOCK(count_lock, 0);
+	tt_assert(count_lock);
+
+	tt_assert(base);
+	if (evthread_make_base_notifiable(base)<0) {
+		tt_abort_msg("Couldn't make base notifiable!");
+	}
+
+#ifndef _WIN32
+	if (data->setup_data && !strcmp(data->setup_data, "forking")) {
+		pid_t pid;
+		int status;
+		sigchld_event = evsignal_new(base, SIGCHLD, sigchld_cb, base);
+		/* This piggybacks on the th_notify_fd weirdly, and looks
+		 * inside libevent internals.  Not a good idea in non-testing
+		 * code! */
+		notification_event = event_new(base,
+		    base->th_notify_fd[0], EV_READ|EV_PERSIST, notify_fd_cb,
+		    NULL);
+		event_add(sigchld_event, NULL);
+		event_add(notification_event, NULL);
+
+		if ((pid = fork()) == 0) {
+			event_del(notification_event);
+			if (event_reinit(base) < 0) {
+				TT_FAIL(("reinit"));
+				exit(1);
+			}
+			event_assign(notification_event, base,
+			    base->th_notify_fd[0], EV_READ|EV_PERSIST,
+			    notify_fd_cb, NULL);
+			event_add(notification_event, NULL);
+	 		goto child;
+		}
+
+		event_base_dispatch(base);
+
+		if (waitpid(pid, &status, 0) == -1)
+			tt_abort_perror("waitpid");
+		TT_BLATHER(("Waitpid okay\n"));
+
+		tt_assert(got_sigchld);
+		tt_int_op(notification_fd_used, ==, 0);
+
+		goto end;
+	}
+
+child:
+#endif
+	for (i = 0; i < NUM_THREADS; ++i)
+		THREAD_START(threads[i], basic_thread, base);
+
+	evtimer_assign(&ev, base, NULL, NULL);
+	evutil_timerclear(&tv);
+	tv.tv_sec = 1000;
+	event_add(&ev, &tv);
+
+	event_base_dispatch(base);
+
+	for (i = 0; i < NUM_THREADS; ++i)
+		THREAD_JOIN(threads[i]);
+
+	event_del(&ev);
+
+	tt_int_op(count, ==, NUM_THREADS * NUM_ITERATIONS);
+
+	EVTHREAD_FREE_LOCK(count_lock, 0);
+
+	TT_BLATHER(("notifiations==%d", notification_fd_used));
+
+end:
+
+	if (notification_event)
+		event_free(notification_event);
+	if (sigchld_event)
+		event_free(sigchld_event);
+}
+
+#undef NUM_THREADS
+#define NUM_THREADS 10
+
+struct alerted_record {
+	struct cond_wait *cond;
+	struct timeval delay;
+	struct timeval alerted_at;
+	int timed_out;
+};
+
+static THREAD_FN
+wait_for_condition(void *arg)
+{
+	struct alerted_record *rec = arg;
+	int r;
+
+	EVLOCK_LOCK(rec->cond->lock, 0);
+	if (rec->delay.tv_sec || rec->delay.tv_usec) {
+		r = EVTHREAD_COND_WAIT_TIMED(rec->cond->cond, rec->cond->lock,
+		    &rec->delay);
+	} else {
+		r = EVTHREAD_COND_WAIT(rec->cond->cond, rec->cond->lock);
+	}
+	EVLOCK_UNLOCK(rec->cond->lock, 0);
+
+	evutil_gettimeofday(&rec->alerted_at, NULL);
+	if (r == 1)
+		rec->timed_out = 1;
+
+	THREAD_RETURN();
+}
+
+static void
+thread_conditions_simple(void *arg)
+{
+	struct timeval tv_signal, tv_timeout, tv_broadcast;
+	struct alerted_record alerted[NUM_THREADS];
+	THREAD_T threads[NUM_THREADS];
+	struct cond_wait cond;
+	int i;
+	struct timeval launched_at;
+	struct event wake_one;
+	struct event wake_all;
+	struct basic_test_data *data = arg;
+	struct event_base *base = data->base;
+	int n_timed_out=0, n_signal=0, n_broadcast=0;
+
+	tv_signal.tv_sec = tv_timeout.tv_sec = tv_broadcast.tv_sec = 0;
+	tv_signal.tv_usec = 30*1000;
+	tv_timeout.tv_usec = 150*1000;
+	tv_broadcast.tv_usec = 500*1000;
+
+	EVTHREAD_ALLOC_LOCK(cond.lock, EVTHREAD_LOCKTYPE_RECURSIVE);
+	EVTHREAD_ALLOC_COND(cond.cond);
+	tt_assert(cond.lock);
+	tt_assert(cond.cond);
+	for (i = 0; i < NUM_THREADS; ++i) {
+		memset(&alerted[i], 0, sizeof(struct alerted_record));
+		alerted[i].cond = &cond;
+	}
+
+	/* Threads 5 and 6 will be allowed to time out */
+	memcpy(&alerted[5].delay, &tv_timeout, sizeof(tv_timeout));
+	memcpy(&alerted[6].delay, &tv_timeout, sizeof(tv_timeout));
+
+	evtimer_assign(&wake_one, base, wake_one_timeout, &cond);
+	evtimer_assign(&wake_all, base, wake_all_timeout, &cond);
+
+	evutil_gettimeofday(&launched_at, NULL);
+
+	/* Launch the threads... */
+	for (i = 0; i < NUM_THREADS; ++i) {
+		THREAD_START(threads[i], wait_for_condition, &alerted[i]);
+	}
+
+	/* Start the timers... */
+	tt_int_op(event_add(&wake_one, &tv_signal), ==, 0);
+	tt_int_op(event_add(&wake_all, &tv_broadcast), ==, 0);
+
+	/* And run for a bit... */
+	event_base_dispatch(base);
+
+	/* And wait till the threads are done. */
+	for (i = 0; i < NUM_THREADS; ++i)
+		THREAD_JOIN(threads[i]);
+
+	/* Now, let's see what happened. At least one of 5 or 6 should
+	 * have timed out. */
+	n_timed_out = alerted[5].timed_out + alerted[6].timed_out;
+	tt_int_op(n_timed_out, >=, 1);
+	tt_int_op(n_timed_out, <=, 2);
+
+	for (i = 0; i < NUM_THREADS; ++i) {
+		const struct timeval *target_delay;
+		struct timeval target_time, actual_delay;
+		if (alerted[i].timed_out) {
+			TT_BLATHER(("%d looks like a timeout\n", i));
+			target_delay = &tv_timeout;
+			tt_assert(i == 5 || i == 6);
+		} else if (evutil_timerisset(&alerted[i].alerted_at)) {
+			long diff1,diff2;
+			evutil_timersub(&alerted[i].alerted_at,
+			    &launched_at, &actual_delay);
+			diff1 = timeval_msec_diff(&actual_delay,
+			    &tv_signal);
+			diff2 = timeval_msec_diff(&actual_delay,
+			    &tv_broadcast);
+			if (labs(diff1) < labs(diff2)) {
+				TT_BLATHER(("%d looks like a signal\n", i));
+				target_delay = &tv_signal;
+				++n_signal;
+			} else {
+				TT_BLATHER(("%d looks like a broadcast\n", i));
+				target_delay = &tv_broadcast;
+				++n_broadcast;
+			}
+		} else {
+			TT_FAIL(("Thread %d never got woken", i));
+			continue;
+		}
+		evutil_timeradd(target_delay, &launched_at, &target_time);
+		test_timeval_diff_leq(&target_time, &alerted[i].alerted_at,
+		    0, 200);
+	}
+	tt_int_op(n_broadcast + n_signal + n_timed_out, ==, NUM_THREADS);
+	tt_int_op(n_signal, ==, 1);
+
+end:
+	EVTHREAD_FREE_LOCK(cond.lock, EVTHREAD_LOCKTYPE_RECURSIVE);
+	EVTHREAD_FREE_COND(cond.cond);
+}
+
+#define CB_COUNT 128
+#define QUEUE_THREAD_COUNT 8
+
+static void
+SLEEP_MS(int ms)
+{
+	struct timeval tv;
+	tv.tv_sec = ms/1000;
+	tv.tv_usec = (ms%1000)*1000;
+	evutil_usleep_(&tv);
+}
+
+struct deferred_test_data {
+	struct event_callback cbs[CB_COUNT];
+	struct event_base *queue;
+};
+
+static struct timeval timer_start = {0,0};
+static struct timeval timer_end = {0,0};
+static unsigned callback_count = 0;
+static THREAD_T load_threads[QUEUE_THREAD_COUNT];
+static struct deferred_test_data deferred_data[QUEUE_THREAD_COUNT];
+
+static void
+deferred_callback(struct event_callback *cb, void *arg)
+{
+	SLEEP_MS(1);
+	callback_count += 1;
+}
+
+static THREAD_FN
+load_deferred_queue(void *arg)
+{
+	struct deferred_test_data *data = arg;
+	size_t i;
+
+	for (i = 0; i < CB_COUNT; ++i) {
+		event_deferred_cb_init_(&data->cbs[i], 0, deferred_callback,
+		    NULL);
+		event_deferred_cb_schedule_(data->queue, &data->cbs[i]);
+		SLEEP_MS(1);
+	}
+
+	THREAD_RETURN();
+}
+
+static void
+timer_callback(evutil_socket_t fd, short what, void *arg)
+{
+	evutil_gettimeofday(&timer_end, NULL);
+}
+
+static void
+start_threads_callback(evutil_socket_t fd, short what, void *arg)
+{
+	int i;
+
+	for (i = 0; i < QUEUE_THREAD_COUNT; ++i) {
+		THREAD_START(load_threads[i], load_deferred_queue,
+				&deferred_data[i]);
+	}
+}
+
+static void
+thread_deferred_cb_skew(void *arg)
+{
+	struct timeval tv_timer = {1, 0};
+	struct event_base *base = NULL;
+	struct event_config *cfg = NULL;
+	struct timeval elapsed;
+	int elapsed_usec;
+	int i;
+
+	cfg = event_config_new();
+	tt_assert(cfg);
+	event_config_set_max_dispatch_interval(cfg, NULL, 16, 0);
+
+	base = event_base_new_with_config(cfg);
+	tt_assert(base);
+
+	for (i = 0; i < QUEUE_THREAD_COUNT; ++i)
+		deferred_data[i].queue = base;
+
+	evutil_gettimeofday(&timer_start, NULL);
+	event_base_once(base, -1, EV_TIMEOUT, timer_callback, NULL,
+			&tv_timer);
+	event_base_once(base, -1, EV_TIMEOUT, start_threads_callback,
+			NULL, NULL);
+	event_base_dispatch(base);
+
+	evutil_timersub(&timer_end, &timer_start, &elapsed);
+	TT_BLATHER(("callback count, %u", callback_count));
+	elapsed_usec =
+	    (unsigned)(elapsed.tv_sec*1000000 + elapsed.tv_usec);
+	TT_BLATHER(("elapsed time, %u usec", elapsed_usec));
+
+	/* XXX be more intelligent here.  just make sure skew is
+	 * within .4 seconds for now. */
+	tt_assert(elapsed_usec >= 600000 && elapsed_usec <= 1400000);
+
+end:
+	for (i = 0; i < QUEUE_THREAD_COUNT; ++i)
+		THREAD_JOIN(load_threads[i]);
+	if (base)
+		event_base_free(base);
+	if (cfg)
+		event_config_free(cfg);
+}
+
+static struct event time_events[5];
+static struct timeval times[5];
+static struct event_base *exit_base = NULL;
+static void
+note_time_cb(evutil_socket_t fd, short what, void *arg)
+{
+	evutil_gettimeofday(arg, NULL);
+	if (arg == &times[4]) {
+		event_base_loopbreak(exit_base);
+	}
+}
+static THREAD_FN
+register_events_subthread(void *arg)
+{
+	struct timeval tv = {0,0};
+	SLEEP_MS(100);
+	event_active(&time_events[0], EV_TIMEOUT, 1);
+	SLEEP_MS(100);
+	event_active(&time_events[1], EV_TIMEOUT, 1);
+	SLEEP_MS(100);
+	tv.tv_usec = 100*1000;
+	event_add(&time_events[2], &tv);
+	tv.tv_usec = 150*1000;
+	event_add(&time_events[3], &tv);
+	SLEEP_MS(200);
+	event_active(&time_events[4], EV_TIMEOUT, 1);
+
+	THREAD_RETURN();
+}
+
+static void
+thread_no_events(void *arg)
+{
+	THREAD_T thread;
+	struct basic_test_data *data = arg;
+	struct timeval starttime, endtime;
+	int i;
+	exit_base = data->base;
+
+	memset(times,0,sizeof(times));
+	for (i=0;i<5;++i) {
+		event_assign(&time_events[i], data->base,
+		    -1, 0, note_time_cb, &times[i]);
+	}
+
+	evutil_gettimeofday(&starttime, NULL);
+	THREAD_START(thread, register_events_subthread, data->base);
+	event_base_loop(data->base, EVLOOP_NO_EXIT_ON_EMPTY);
+	evutil_gettimeofday(&endtime, NULL);
+	tt_assert(event_base_got_break(data->base));
+	THREAD_JOIN(thread);
+	for (i=0; i<5; ++i) {
+		struct timeval diff;
+		double sec;
+		evutil_timersub(&times[i], &starttime, &diff);
+		sec = diff.tv_sec + diff.tv_usec/1.0e6;
+		TT_BLATHER(("event %d at %.4f seconds", i, sec));
+	}
+	test_timeval_diff_eq(&starttime, &times[0], 100);
+	test_timeval_diff_eq(&starttime, &times[1], 200);
+	test_timeval_diff_eq(&starttime, &times[2], 400);
+	test_timeval_diff_eq(&starttime, &times[3], 450);
+	test_timeval_diff_eq(&starttime, &times[4], 500);
+	test_timeval_diff_eq(&starttime, &endtime,  500);
+
+end:
+	;
+}
+
+#define TEST(name, f)							\
+	{ #name, thread_##name, TT_FORK|TT_NEED_THREADS|TT_NEED_BASE|(f),	\
+	  &basic_setup, NULL }
+
+struct testcase_t thread_testcases[] = {
+	{ "basic", thread_basic, TT_FORK|TT_NEED_THREADS|TT_NEED_BASE,
+	  &basic_setup, NULL },
+#ifndef _WIN32
+	{ "forking", thread_basic, TT_FORK|TT_NEED_THREADS|TT_NEED_BASE,
+	  &basic_setup, (char*)"forking" },
+#endif
+	TEST(conditions_simple, TT_RETRIABLE),
+	{ "deferred_cb_skew", thread_deferred_cb_skew,
+	  TT_FORK|TT_NEED_THREADS|TT_OFF_BY_DEFAULT,
+	  &basic_setup, NULL },
+#ifndef _WIN32
+	/****** XXX TODO FIXME windows seems to be having some timing trouble,
+	 * looking into it now. / ellzey
+	 ******/
+	TEST(no_events, TT_RETRIABLE),
+#endif
+	END_OF_TESTCASES
+};
+