summaryrefslogtreecommitdiffstatshomepage
path: root/3rdparty/libuv/test/test-signal-multiple-loops.c
diff options
context:
space:
mode:
author ImJezze <jezze@gmx.net>2016-02-21 11:48:45 +0100
committer ImJezze <jezze@gmx.net>2016-02-21 11:48:45 +0100
commitcc24a339d8c0517259084b5c178d784626ba965c (patch)
tree9868e9687b5802ae0a3733712a3bbeb3bc75c953 /3rdparty/libuv/test/test-signal-multiple-loops.c
parentb5daabda5495dea5c50e17961ecfed2ea8619d76 (diff)
Merge remote-tracking branch 'refs/remotes/mamedev/master'
Second attempt
Diffstat (limited to '3rdparty/libuv/test/test-signal-multiple-loops.c')
-rw-r--r--3rdparty/libuv/test/test-signal-multiple-loops.c290
1 files changed, 290 insertions, 0 deletions
diff --git a/3rdparty/libuv/test/test-signal-multiple-loops.c b/3rdparty/libuv/test/test-signal-multiple-loops.c
new file mode 100644
index 00000000000..158129919bd
--- /dev/null
+++ b/3rdparty/libuv/test/test-signal-multiple-loops.c
@@ -0,0 +1,290 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+
+/* This test does not pretend to be cross-platform. */
+#ifndef _WIN32
+
+#include "uv.h"
+#include "task.h"
+
+#include <errno.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* The value of NUM_SIGNAL_HANDLING_THREADS is not arbitrary; it needs to be a
+ * multiple of three for reasons that will become clear when you scroll down.
+ * We're basically creating three different thread groups. The total needs
+ * to be divisible by three in order for the numbers in the final check to
+ * match up.
+ */
+#define NUM_SIGNAL_HANDLING_THREADS 24
+#define NUM_LOOP_CREATING_THREADS 10
+
+enum signal_action {
+ ONLY_SIGUSR1,
+ ONLY_SIGUSR2,
+ SIGUSR1_AND_SIGUSR2
+};
+
+static uv_sem_t sem;
+static uv_mutex_t counter_lock;
+static volatile int stop = 0;
+
+static volatile int signal1_cb_counter = 0;
+static volatile int signal2_cb_counter = 0;
+static volatile int loop_creation_counter = 0;
+
+
+static void increment_counter(volatile int* counter) {
+ uv_mutex_lock(&counter_lock);
+ ++(*counter);
+ uv_mutex_unlock(&counter_lock);
+}
+
+
+static void signal1_cb(uv_signal_t* handle, int signum) {
+ ASSERT(signum == SIGUSR1);
+ increment_counter(&signal1_cb_counter);
+ uv_signal_stop(handle);
+}
+
+
+static void signal2_cb(uv_signal_t* handle, int signum) {
+ ASSERT(signum == SIGUSR2);
+ increment_counter(&signal2_cb_counter);
+ uv_signal_stop(handle);
+}
+
+
+static void signal_handling_worker(void* context) {
+ enum signal_action action;
+ uv_signal_t signal1a;
+ uv_signal_t signal1b;
+ uv_signal_t signal2;
+ uv_loop_t loop;
+ int r;
+
+ action = (enum signal_action) (uintptr_t) context;
+
+ ASSERT(0 == uv_loop_init(&loop));
+
+ /* Setup the signal watchers and start them. */
+ if (action == ONLY_SIGUSR1 || action == SIGUSR1_AND_SIGUSR2) {
+ r = uv_signal_init(&loop, &signal1a);
+ ASSERT(r == 0);
+ r = uv_signal_start(&signal1a, signal1_cb, SIGUSR1);
+ ASSERT(r == 0);
+ r = uv_signal_init(&loop, &signal1b);
+ ASSERT(r == 0);
+ r = uv_signal_start(&signal1b, signal1_cb, SIGUSR1);
+ ASSERT(r == 0);
+ }
+
+ if (action == ONLY_SIGUSR2 || action == SIGUSR1_AND_SIGUSR2) {
+ r = uv_signal_init(&loop, &signal2);
+ ASSERT(r == 0);
+ r = uv_signal_start(&signal2, signal2_cb, SIGUSR2);
+ ASSERT(r == 0);
+ }
+
+ /* Signal watchers are now set up. */
+ uv_sem_post(&sem);
+
+ /* Wait for all signals. The signal callbacks stop the watcher, so uv_run
+ * will return when all signal watchers caught a signal.
+ */
+ r = uv_run(&loop, UV_RUN_DEFAULT);
+ ASSERT(r == 0);
+
+ /* Restart the signal watchers. */
+ if (action == ONLY_SIGUSR1 || action == SIGUSR1_AND_SIGUSR2) {
+ r = uv_signal_start(&signal1a, signal1_cb, SIGUSR1);
+ ASSERT(r == 0);
+ r = uv_signal_start(&signal1b, signal1_cb, SIGUSR1);
+ ASSERT(r == 0);
+ }
+
+ if (action == ONLY_SIGUSR2 || action == SIGUSR1_AND_SIGUSR2) {
+ r = uv_signal_start(&signal2, signal2_cb, SIGUSR2);
+ ASSERT(r == 0);
+ }
+
+ /* Wait for signals once more. */
+ uv_sem_post(&sem);
+
+ r = uv_run(&loop, UV_RUN_DEFAULT);
+ ASSERT(r == 0);
+
+ /* Close the watchers. */
+ if (action == ONLY_SIGUSR1 || action == SIGUSR1_AND_SIGUSR2) {
+ uv_close((uv_handle_t*) &signal1a, NULL);
+ uv_close((uv_handle_t*) &signal1b, NULL);
+ }
+
+ if (action == ONLY_SIGUSR2 || action == SIGUSR1_AND_SIGUSR2) {
+ uv_close((uv_handle_t*) &signal2, NULL);
+ }
+
+ /* Wait for the signal watchers to close. */
+ r = uv_run(&loop, UV_RUN_DEFAULT);
+ ASSERT(r == 0);
+
+ uv_loop_close(&loop);
+}
+
+
+static void signal_unexpected_cb(uv_signal_t* handle, int signum) {
+ ASSERT(0 && "signal_unexpected_cb should never be called");
+}
+
+
+static void loop_creating_worker(void* context) {
+ (void) context;
+
+ do {
+ uv_loop_t *loop;
+ uv_signal_t signal;
+ int r;
+
+ loop = malloc(sizeof(*loop));
+ ASSERT(loop != NULL);
+ ASSERT(0 == uv_loop_init(loop));
+
+ r = uv_signal_init(loop, &signal);
+ ASSERT(r == 0);
+
+ r = uv_signal_start(&signal, signal_unexpected_cb, SIGTERM);
+ ASSERT(r == 0);
+
+ uv_close((uv_handle_t*) &signal, NULL);
+
+ r = uv_run(loop, UV_RUN_DEFAULT);
+ ASSERT(r == 0);
+
+ uv_loop_close(loop);
+ free(loop);
+
+ increment_counter(&loop_creation_counter);
+ } while (!stop);
+}
+
+
+TEST_IMPL(signal_multiple_loops) {
+ uv_thread_t loop_creating_threads[NUM_LOOP_CREATING_THREADS];
+ uv_thread_t signal_handling_threads[NUM_SIGNAL_HANDLING_THREADS];
+ enum signal_action action;
+ sigset_t sigset;
+ int i;
+ int r;
+
+ r = uv_sem_init(&sem, 0);
+ ASSERT(r == 0);
+
+ r = uv_mutex_init(&counter_lock);
+ ASSERT(r == 0);
+
+ /* Create a couple of threads that create a destroy loops continuously. */
+ for (i = 0; i < NUM_LOOP_CREATING_THREADS; i++) {
+ r = uv_thread_create(&loop_creating_threads[i],
+ loop_creating_worker,
+ NULL);
+ ASSERT(r == 0);
+ }
+
+ /* Create a couple of threads that actually handle signals. */
+ for (i = 0; i < NUM_SIGNAL_HANDLING_THREADS; i++) {
+ switch (i % 3) {
+ case 0: action = ONLY_SIGUSR1; break;
+ case 1: action = ONLY_SIGUSR2; break;
+ case 2: action = SIGUSR1_AND_SIGUSR2; break;
+ }
+
+ r = uv_thread_create(&signal_handling_threads[i],
+ signal_handling_worker,
+ (void*) (uintptr_t) action);
+ ASSERT(r == 0);
+ }
+
+ /* Wait until all threads have started and set up their signal watchers. */
+ for (i = 0; i < NUM_SIGNAL_HANDLING_THREADS; i++)
+ uv_sem_wait(&sem);
+
+ r = kill(getpid(), SIGUSR1);
+ ASSERT(r == 0);
+ r = kill(getpid(), SIGUSR2);
+ ASSERT(r == 0);
+
+ /* Wait for all threads to handle these signals. */
+ for (i = 0; i < NUM_SIGNAL_HANDLING_THREADS; i++)
+ uv_sem_wait(&sem);
+
+ /* Block all signals to this thread, so we are sure that from here the signal
+ * handler runs in another thread. This is is more likely to catch thread and
+ * signal safety issues if there are any.
+ */
+ sigfillset(&sigset);
+ pthread_sigmask(SIG_SETMASK, &sigset, NULL);
+
+ r = kill(getpid(), SIGUSR1);
+ ASSERT(r == 0);
+ r = kill(getpid(), SIGUSR2);
+ ASSERT(r == 0);
+
+ /* Wait for all signal handling threads to exit. */
+ for (i = 0; i < NUM_SIGNAL_HANDLING_THREADS; i++) {
+ r = uv_thread_join(&signal_handling_threads[i]);
+ ASSERT(r == 0);
+ }
+
+ /* Tell all loop creating threads to stop. */
+ stop = 1;
+
+ /* Wait for all loop creating threads to exit. */
+ for (i = 0; i < NUM_LOOP_CREATING_THREADS; i++) {
+ r = uv_thread_join(&loop_creating_threads[i]);
+ ASSERT(r == 0);
+ }
+
+ printf("signal1_cb calls: %d\n", signal1_cb_counter);
+ printf("signal2_cb calls: %d\n", signal2_cb_counter);
+ printf("loops created and destroyed: %d\n", loop_creation_counter);
+
+ /* The division by three reflects the fact that we spawn three different
+ * thread groups of (NUM_SIGNAL_HANDLING_THREADS / 3) threads each.
+ */
+ ASSERT(signal1_cb_counter == 8 * (NUM_SIGNAL_HANDLING_THREADS / 3));
+ ASSERT(signal2_cb_counter == 4 * (NUM_SIGNAL_HANDLING_THREADS / 3));
+
+ /* We don't know exactly how much loops will be created and destroyed, but at
+ * least there should be 1 for every loop creating thread.
+ */
+ ASSERT(loop_creation_counter >= NUM_LOOP_CREATING_THREADS);
+
+ MAKE_VALGRIND_HAPPY();
+ return 0;
+}
+
+#endif /* !_WIN32 */