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-rw-r--r--gnulib-tests/test-tls.c538
1 files changed, 538 insertions, 0 deletions
diff --git a/gnulib-tests/test-tls.c b/gnulib-tests/test-tls.c
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+/* Test of thread-local storage in multithreaded situations.
+ Copyright (C) 2005, 2008-2022 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005. */
+
+#include <config.h>
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
+# define TEST_ISOC_THREADS 1
+#endif
+#if USE_POSIX_THREADS
+# define TEST_POSIX_THREADS 1
+#endif
+#if USE_WINDOWS_THREADS
+# define TEST_WINDOWS_THREADS 1
+#endif
+
+/* Whether to help the scheduler through explicit yield().
+ Uncomment this to see if the operating system has a fair scheduler. */
+#define EXPLICIT_YIELD 1
+
+/* Whether to print debugging messages. */
+#define ENABLE_DEBUGGING 0
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "glthread/tls.h"
+#include "glthread/thread.h"
+#include "glthread/lock.h"
+#include "glthread/yield.h"
+
+#if HAVE_DECL_ALARM
+# include <signal.h>
+# include <unistd.h>
+#endif
+
+#if ENABLE_DEBUGGING
+# define dbgprintf printf
+#else
+# define dbgprintf if (0) printf
+#endif
+
+#if EXPLICIT_YIELD
+# define yield() gl_thread_yield ()
+#else
+# define yield()
+#endif
+
+static void
+perhaps_yield (void)
+{
+ /* This helps making the sequence of thread activations less predictable. */
+ if ((((unsigned int) rand () >> 3) % 4) == 0)
+ yield ();
+}
+
+
+/* ----------------------- Test thread-local storage ----------------------- */
+
+/* Number of simultaneous threads. */
+#define THREAD_COUNT 16
+
+/* Number of operations performed in each thread. */
+#define REPEAT_COUNT 50000
+
+#define KEYS_COUNT 4
+
+static gl_tls_key_t mykeys[KEYS_COUNT];
+
+static void *
+worker_thread (void *arg)
+{
+ unsigned int id = (unsigned int) (uintptr_t) arg;
+ int i, j, repeat;
+ unsigned int values[KEYS_COUNT];
+
+ dbgprintf ("Worker %p started\n", gl_thread_self_pointer ());
+
+ /* Initialize the per-thread storage. */
+ for (i = 0; i < KEYS_COUNT; i++)
+ {
+ values[i] = (((unsigned int) rand () >> 3) % 1000000) * THREAD_COUNT + id;
+ /* Hopefully no arithmetic overflow. */
+ if ((values[i] % THREAD_COUNT) != id)
+ abort ();
+ }
+ perhaps_yield ();
+
+ /* Verify that the initial value is NULL. */
+ dbgprintf ("Worker %p before initial verify\n", gl_thread_self_pointer ());
+ for (i = 0; i < KEYS_COUNT; i++)
+ if (gl_tls_get (mykeys[i]) != NULL)
+ abort ();
+ dbgprintf ("Worker %p after initial verify\n", gl_thread_self_pointer ());
+ perhaps_yield ();
+
+ /* Initialize the per-thread storage. */
+ dbgprintf ("Worker %p before first tls_set\n", gl_thread_self_pointer ());
+ for (i = 0; i < KEYS_COUNT; i++)
+ {
+ unsigned int *ptr = (unsigned int *) malloc (sizeof (unsigned int));
+ *ptr = values[i];
+ gl_tls_set (mykeys[i], ptr);
+ }
+ dbgprintf ("Worker %p after first tls_set\n", gl_thread_self_pointer ());
+ perhaps_yield ();
+
+ /* Shuffle around the pointers. */
+ for (repeat = REPEAT_COUNT; repeat > 0; repeat--)
+ {
+ dbgprintf ("Worker %p doing value swapping\n", gl_thread_self_pointer ());
+ i = ((unsigned int) rand () >> 3) % KEYS_COUNT;
+ j = ((unsigned int) rand () >> 3) % KEYS_COUNT;
+ if (i != j)
+ {
+ void *vi = gl_tls_get (mykeys[i]);
+ void *vj = gl_tls_get (mykeys[j]);
+
+ gl_tls_set (mykeys[i], vj);
+ gl_tls_set (mykeys[j], vi);
+ }
+ perhaps_yield ();
+ }
+
+ /* Verify that all the values are from this thread. */
+ dbgprintf ("Worker %p before final verify\n", gl_thread_self_pointer ());
+ for (i = 0; i < KEYS_COUNT; i++)
+ if ((*(unsigned int *) gl_tls_get (mykeys[i]) % THREAD_COUNT) != id)
+ abort ();
+ dbgprintf ("Worker %p after final verify\n", gl_thread_self_pointer ());
+ perhaps_yield ();
+
+ dbgprintf ("Worker %p dying.\n", gl_thread_self_pointer ());
+ return NULL;
+}
+
+static void
+test_tls (void)
+{
+ int pass, i;
+
+ for (pass = 0; pass < 2; pass++)
+ {
+ gl_thread_t threads[THREAD_COUNT];
+
+ if (pass == 0)
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_key_init (mykeys[i], free);
+ else
+ for (i = KEYS_COUNT - 1; i >= 0; i--)
+ gl_tls_key_init (mykeys[i], free);
+
+ /* Spawn the threads. */
+ for (i = 0; i < THREAD_COUNT; i++)
+ threads[i] = gl_thread_create (worker_thread, (void *) (uintptr_t) i);
+
+ /* Wait for the threads to terminate. */
+ for (i = 0; i < THREAD_COUNT; i++)
+ gl_thread_join (threads[i], NULL);
+
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_key_destroy (mykeys[i]);
+ }
+}
+
+#undef KEYS_COUNT
+#undef REPEAT_COUNT
+#undef THREAD_COUNT
+
+
+/* --------------- Test thread-local storage with destructors --------------- */
+
+/* Number of simultaneous threads. */
+#define THREAD_COUNT 10
+
+/* Number of keys to allocate in each thread. */
+#define KEYS_COUNT 10
+
+gl_lock_define_initialized(static, sumlock)
+static uintptr_t sum;
+
+static void
+inc_sum (uintptr_t value)
+{
+ gl_lock_lock (sumlock);
+ sum += value;
+ gl_lock_unlock (sumlock);
+}
+
+static void
+destructor0 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 0)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor1 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 1)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor2 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 2)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor3 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 3)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor4 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 4)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor5 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 5)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor6 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 6)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor7 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 7)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor8 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 8)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void
+destructor9 (void *value)
+{
+ if ((((uintptr_t) value - 1) % 10) != 9)
+ abort ();
+ inc_sum ((uintptr_t) value);
+}
+
+static void (*destructor_table[10]) (void *) =
+ {
+ destructor0,
+ destructor1,
+ destructor2,
+ destructor3,
+ destructor4,
+ destructor5,
+ destructor6,
+ destructor7,
+ destructor8,
+ destructor9
+ };
+
+static gl_tls_key_t dtorcheck_keys[THREAD_COUNT][KEYS_COUNT];
+
+/* Worker thread that uses destructors that verify that the destructor belongs
+ to the right thread. */
+static void *
+dtorcheck1_thread (void *arg)
+{
+ unsigned int id = (unsigned int) (uintptr_t) arg;
+ gl_tls_key_t *keys = dtorcheck_keys[id]; /* an array of KEYS_COUNT keys */
+ int i;
+
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_key_init (keys[i], destructor_table[i]);
+
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_set (keys[i], (void *) (uintptr_t) (10 * id + i + 1));
+
+ return NULL;
+}
+
+static void
+test_tls_dtorcheck1 (void)
+{
+ gl_thread_t threads[THREAD_COUNT];
+ unsigned int id;
+ int i;
+ uintptr_t expected_sum;
+
+ sum = 0;
+
+ /* Spawn the threads. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ threads[id] = gl_thread_create (dtorcheck1_thread, (void *) (uintptr_t) id);
+
+ /* Wait for the threads to terminate. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ gl_thread_join (threads[id], NULL);
+
+ /* Clean up the keys. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_key_destroy (dtorcheck_keys[id][i]);
+
+ /* Check that the destructor was invoked for each key. */
+ expected_sum = 10 * KEYS_COUNT * (THREAD_COUNT * (THREAD_COUNT - 1) / 2)
+ + THREAD_COUNT * (KEYS_COUNT * (KEYS_COUNT - 1) / 2)
+ + THREAD_COUNT * KEYS_COUNT;
+ if (sum != expected_sum)
+ abort ();
+}
+
+/* Worker thread that uses destructors that verify that the destructor belongs
+ to the right key allocated within the thread. */
+static void *
+dtorcheck2_thread (void *arg)
+{
+ unsigned int id = (unsigned int) (uintptr_t) arg;
+ gl_tls_key_t *keys = dtorcheck_keys[id]; /* an array of KEYS_COUNT keys */
+ int i;
+
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_key_init (keys[i], destructor_table[id]);
+
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_set (keys[i], (void *) (uintptr_t) (10 * i + id + 1));
+
+ return NULL;
+}
+
+static void
+test_tls_dtorcheck2 (void)
+{
+ gl_thread_t threads[THREAD_COUNT];
+ unsigned int id;
+ int i;
+ uintptr_t expected_sum;
+
+ sum = 0;
+
+ /* Spawn the threads. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ threads[id] = gl_thread_create (dtorcheck2_thread, (void *) (uintptr_t) id);
+
+ /* Wait for the threads to terminate. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ gl_thread_join (threads[id], NULL);
+
+ /* Clean up the keys. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_key_destroy (dtorcheck_keys[id][i]);
+
+ /* Check that the destructor was invoked for each key. */
+ expected_sum = 10 * THREAD_COUNT * (KEYS_COUNT * (KEYS_COUNT - 1) / 2)
+ + KEYS_COUNT * (THREAD_COUNT * (THREAD_COUNT - 1) / 2)
+ + THREAD_COUNT * KEYS_COUNT;
+ if (sum != expected_sum)
+ abort ();
+}
+
+#undef KEYS_COUNT
+#undef THREAD_COUNT
+
+
+/* --- Test thread-local storage with with races between init and destroy --- */
+
+/* Number of simultaneous threads. */
+#define THREAD_COUNT 10
+
+/* Number of keys to allocate in each thread. */
+#define KEYS_COUNT 10
+
+/* Number of times to destroy and reallocate a key in each thread. */
+#define REPEAT_COUNT 100000
+
+static gl_tls_key_t racecheck_keys[THREAD_COUNT][KEYS_COUNT];
+
+/* Worker thread that does many destructions and reallocations of keys, and also
+ uses destructors that verify that the destructor belongs to the right key. */
+static void *
+racecheck_thread (void *arg)
+{
+ unsigned int id = (unsigned int) (uintptr_t) arg;
+ gl_tls_key_t *keys = racecheck_keys[id]; /* an array of KEYS_COUNT keys */
+ int repeat;
+ int i;
+
+ dbgprintf ("Worker %p started\n", gl_thread_self_pointer ());
+
+ for (i = 0; i < KEYS_COUNT; i++)
+ {
+ gl_tls_key_init (keys[i], destructor_table[i]);
+ gl_tls_set (keys[i], (void *) (uintptr_t) (10 * id + i + 1));
+ }
+
+ for (repeat = REPEAT_COUNT; repeat > 0; repeat--)
+ {
+ i = ((unsigned int) rand () >> 3) % KEYS_COUNT;
+ dbgprintf ("Worker %p reallocating key %d\n", gl_thread_self_pointer (), i);
+ gl_tls_key_destroy (keys[i]);
+ gl_tls_key_init (keys[i], destructor_table[i]);
+ gl_tls_set (keys[i], (void *) (uintptr_t) (10 * id + i + 1));
+ }
+
+ dbgprintf ("Worker %p dying.\n", gl_thread_self_pointer ());
+ return NULL;
+}
+
+static void
+test_tls_racecheck (void)
+{
+ gl_thread_t threads[THREAD_COUNT];
+ unsigned int id;
+ int i;
+ uintptr_t expected_sum;
+
+ sum = 0;
+
+ /* Spawn the threads. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ threads[id] = gl_thread_create (racecheck_thread, (void *) (uintptr_t) id);
+
+ /* Wait for the threads to terminate. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ gl_thread_join (threads[id], NULL);
+
+ /* Clean up the keys. */
+ for (id = 0; id < THREAD_COUNT; id++)
+ for (i = 0; i < KEYS_COUNT; i++)
+ gl_tls_key_destroy (racecheck_keys[id][i]);
+
+ /* Check that the destructor was invoked for each key. */
+ expected_sum = 10 * KEYS_COUNT * (THREAD_COUNT * (THREAD_COUNT - 1) / 2)
+ + THREAD_COUNT * (KEYS_COUNT * (KEYS_COUNT - 1) / 2)
+ + THREAD_COUNT * KEYS_COUNT;
+ if (sum != expected_sum)
+ abort ();
+}
+
+#undef REPEAT_COUNT
+#undef KEYS_COUNT
+#undef THREAD_COUNT
+
+
+/* -------------------------------------------------------------------------- */
+
+int
+main ()
+{
+#if HAVE_DECL_ALARM
+ /* Declare failure if test takes too long, by using default abort
+ caused by SIGALRM. */
+ int alarm_value = 600;
+ signal (SIGALRM, SIG_DFL);
+ alarm (alarm_value);
+#endif
+
+ printf ("Starting test_tls ..."); fflush (stdout);
+ test_tls ();
+ printf (" OK\n"); fflush (stdout);
+
+ printf ("Starting test_tls_dtorcheck1 ..."); fflush (stdout);
+ test_tls_dtorcheck1 ();
+ printf (" OK\n"); fflush (stdout);
+
+ printf ("Starting test_tls_dtorcheck2 ..."); fflush (stdout);
+ test_tls_dtorcheck2 ();
+ printf (" OK\n"); fflush (stdout);
+
+ /* This test hangs with the mingw-w64 winpthreads. */
+#if (defined _WIN32 && ! defined __CYGWIN__) && TEST_POSIX_THREADS
+ fputs ("Skipping test: it is known to hang with the mingw-w64 winpthreads.\n",
+ stderr);
+ exit (77);
+#else
+ printf ("Starting test_tls_racecheck ..."); fflush (stdout);
+ test_tls_racecheck ();
+ printf (" OK\n"); fflush (stdout);
+#endif
+
+ return 0;
+}
+
+#else
+
+/* No multithreading available. */
+
+#include <stdio.h>
+
+int
+main ()
+{
+ fputs ("Skipping test: multithreading not enabled\n", stderr);
+ return 77;
+}
+
+#endif
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