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author | 2016-02-21 11:48:45 +0100 | |
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committer | 2016-02-21 11:48:45 +0100 | |
commit | cc24a339d8c0517259084b5c178d784626ba965c (patch) | |
tree | 9868e9687b5802ae0a3733712a3bbeb3bc75c953 /3rdparty/libuv/test/test-signal-multiple-loops.c | |
parent | b5daabda5495dea5c50e17961ecfed2ea8619d76 (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.c | 290 |
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 */ |