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-rw-r--r--test/testprocmutex.c294
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diff --git a/test/testprocmutex.c b/test/testprocmutex.c
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr_shm.h"
+#include "apr_thread_proc.h"
+#include "apr_file_io.h"
+#include "apr_proc_mutex.h"
+#include "apr_errno.h"
+#include "apr_general.h"
+#include "apr_strings.h"
+#include "apr_getopt.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include "testutil.h"
+
+#if APR_HAS_FORK
+
+#define MAX_ITER 200
+#define CHILDREN 6
+#define MAX_COUNTER (MAX_ITER * CHILDREN)
+#define MAX_WAIT_USEC (1000*1000)
+
+static apr_proc_mutex_t *proc_lock;
+static volatile int *x;
+
+typedef struct lockmech {
+ apr_lockmech_e num;
+ const char *name;
+} lockmech_t;
+
+/* a slower more racy way to implement (*x)++ */
+static int increment(int n)
+{
+ apr_sleep(1);
+ return n+1;
+}
+
+static void make_child(abts_case *tc, int trylock, apr_proc_t **proc, apr_pool_t *p)
+{
+ apr_status_t rv;
+
+ *proc = apr_pcalloc(p, sizeof(**proc));
+
+ /* slight delay to allow things to settle */
+ apr_sleep (1);
+
+ rv = apr_proc_fork(*proc, p);
+ if (rv == APR_INCHILD) {
+ int i = 0;
+ /* The parent process has setup all processes to call apr_terminate
+ * at exit. But, that means that all processes must also call
+ * apr_initialize at startup. You cannot have an unequal number
+ * of apr_terminate and apr_initialize calls. If you do, bad things
+ * will happen. In this case, the bad thing is that if the mutex
+ * is a semaphore, it will be destroyed before all of the processes
+ * die. That means that the test will most likely fail.
+ */
+ apr_initialize();
+
+ if (apr_proc_mutex_child_init(&proc_lock, NULL, p))
+ exit(1);
+
+ do {
+ if (trylock > 0) {
+ int wait_usec = 0;
+
+ while ((rv = apr_proc_mutex_trylock(proc_lock))) {
+ if (!APR_STATUS_IS_EBUSY(rv))
+ exit(1);
+ if (++wait_usec >= MAX_WAIT_USEC)
+ exit(1);
+ apr_sleep(1);
+ }
+ }
+ else if (trylock < 0) {
+ int wait_usec = 0;
+
+ while ((rv = apr_proc_mutex_timedlock(proc_lock, 1))) {
+ if (!APR_STATUS_IS_TIMEUP(rv))
+ exit(1);
+ if (++wait_usec >= MAX_WAIT_USEC)
+ exit(1);
+ }
+ }
+ else {
+ if (apr_proc_mutex_lock(proc_lock))
+ exit(1);
+ }
+
+ i++;
+ *x = increment(*x);
+ if (apr_proc_mutex_unlock(proc_lock))
+ exit(1);
+ } while (i < MAX_ITER);
+ exit(0);
+ }
+
+ ABTS_ASSERT(tc, "fork failed", rv == APR_INPARENT);
+}
+
+/* Wait for a child process and check it terminated with success. */
+static void await_child(abts_case *tc, apr_proc_t *proc)
+{
+ int code;
+ apr_exit_why_e why;
+ apr_status_t rv;
+
+ rv = apr_proc_wait(proc, &code, &why, APR_WAIT);
+ ABTS_ASSERT(tc, "child did not terminate with success",
+ rv == APR_CHILD_DONE && why == APR_PROC_EXIT && code == 0);
+}
+
+static void test_exclusive(abts_case *tc, const char *lockname,
+ lockmech_t *mech)
+{
+ apr_proc_t *child[CHILDREN];
+ apr_status_t rv;
+ int n;
+
+ rv = apr_proc_mutex_create(&proc_lock, lockname, mech->num, p);
+ if (rv == APR_ENOTIMPL) {
+ /* MacOS lacks TIMED implementation, so don't fail for ENOTIMPL */
+ fprintf(stderr, "method %s not implemented, ", mech->name);
+ return;
+ }
+ APR_ASSERT_SUCCESS(tc, "create the mutex", rv);
+
+ for (n = 0; n < CHILDREN; n++)
+ make_child(tc, 0, &child[n], p);
+
+ for (n = 0; n < CHILDREN; n++)
+ await_child(tc, child[n]);
+
+ ABTS_ASSERT(tc, "Locks don't appear to work", *x == MAX_COUNTER);
+
+ rv = apr_proc_mutex_trylock(proc_lock);
+ if (rv == APR_ENOTIMPL) {
+ fprintf(stderr, "%s_trylock() not implemented, ", mech->name);
+ ABTS_ASSERT(tc, "Default timed trylock not implemented",
+ mech->num != APR_LOCK_DEFAULT &&
+ mech->num != APR_LOCK_DEFAULT_TIMED);
+ }
+ else {
+ APR_ASSERT_SUCCESS(tc, "check for trylock", rv);
+
+ for (n = 0; n < 2; n++) {
+ rv = apr_proc_mutex_trylock(proc_lock);
+ /* Some mech (eg. flock or fcntl) may succeed when the
+ * lock is re-acquired in the same process.
+ */
+ if (rv != APR_SUCCESS) {
+ ABTS_ASSERT(tc,
+ apr_psprintf(p, "%s_trylock() should be busy => %pm",
+ mech->name, &rv),
+ APR_STATUS_IS_EBUSY(rv));
+ }
+ }
+
+ rv = apr_proc_mutex_unlock(proc_lock);
+ APR_ASSERT_SUCCESS(tc, "unlock after trylock check", rv);
+
+ *x = 0;
+
+ for (n = 0; n < CHILDREN; n++)
+ make_child(tc, 1, &child[n], p);
+
+ for (n = 0; n < CHILDREN; n++)
+ await_child(tc, child[n]);
+
+ ABTS_ASSERT(tc, "Locks don't appear to work with trylock",
+ *x == MAX_COUNTER);
+ }
+
+#if APR_HAS_TIMEDLOCKS
+ rv = apr_proc_mutex_timedlock(proc_lock, 1);
+ if (rv == APR_ENOTIMPL) {
+ fprintf(stderr, "%s_timedlock() not implemented, ", mech->name);
+ ABTS_ASSERT(tc, "Default timed timedlock not implemented",
+ mech->num != APR_LOCK_DEFAULT_TIMED);
+ }
+ else {
+ APR_ASSERT_SUCCESS(tc, "check for timedlock", rv);
+
+ for (n = 0; n < 2; n++) {
+ rv = apr_proc_mutex_timedlock(proc_lock, 1);
+ /* Some mech (eg. flock or fcntl) may succeed when the
+ * lock is re-acquired in the same process.
+ */
+ if (rv != APR_SUCCESS) {
+ ABTS_ASSERT(tc,
+ apr_psprintf(p, "%s_timedlock() should time out => %pm",
+ mech->name, &rv),
+ APR_STATUS_IS_TIMEUP(rv));
+ }
+ }
+
+ rv = apr_proc_mutex_unlock(proc_lock);
+ APR_ASSERT_SUCCESS(tc, "unlock after timedlock check", rv);
+
+ *x = 0;
+
+ for (n = 0; n < CHILDREN; n++)
+ make_child(tc, -1, &child[n], p);
+
+ for (n = 0; n < CHILDREN; n++)
+ await_child(tc, child[n]);
+
+ ABTS_ASSERT(tc, "Locks don't appear to work with timedlock",
+ *x == MAX_COUNTER);
+ }
+#endif /* APR_HAS_TIMEDLOCKS */
+}
+
+static void proc_mutex(abts_case *tc, void *data)
+{
+ apr_status_t rv;
+ const char *shmname = "tpm.shm";
+ apr_shm_t *shm;
+
+ /* Use anonymous shm if available. */
+ rv = apr_shm_create(&shm, sizeof(int), NULL, p);
+ if (rv == APR_ENOTIMPL) {
+ apr_file_remove(shmname, p);
+ rv = apr_shm_create(&shm, sizeof(int), shmname, p);
+ }
+
+ APR_ASSERT_SUCCESS(tc, "create shm segment", rv);
+ if (rv != APR_SUCCESS)
+ return;
+
+ x = apr_shm_baseaddr_get(shm);
+ test_exclusive(tc, NULL, data);
+ rv = apr_shm_destroy(shm);
+ APR_ASSERT_SUCCESS(tc, "Error destroying shared memory block", rv);
+}
+
+
+abts_suite *testprocmutex(abts_suite *suite)
+{
+ lockmech_t lockmechs[] = {
+ {APR_LOCK_DEFAULT, "default"}
+#if APR_HAS_FLOCK_SERIALIZE
+ ,{APR_LOCK_FLOCK, "flock"}
+#endif
+#if APR_HAS_SYSVSEM_SERIALIZE
+ ,{APR_LOCK_SYSVSEM, "sysvsem"}
+#endif
+#if APR_HAS_POSIXSEM_SERIALIZE
+ ,{APR_LOCK_POSIXSEM, "posix"}
+#endif
+#if APR_HAS_FCNTL_SERIALIZE
+ ,{APR_LOCK_FCNTL, "fcntl"}
+#endif
+#if APR_HAS_PROC_PTHREAD_SERIALIZE
+ ,{APR_LOCK_PROC_PTHREAD, "proc_pthread"}
+#endif
+ ,{APR_LOCK_DEFAULT_TIMED, "default_timed"}
+ };
+ int i;
+
+ suite = ADD_SUITE(suite)
+ for (i = 0; i < sizeof(lockmechs) / sizeof(lockmechs[0]); i++) {
+ abts_run_test(suite, proc_mutex, &lockmechs[i]);
+ }
+ return suite;
+}
+
+#else /* APR_HAS_FORK */
+
+static void proc_mutex(abts_case *tc, void *data)
+{
+ ABTS_NOT_IMPL(tc, "APR lacks fork() support");
+}
+
+abts_suite *testprocmutex(abts_suite *suite)
+{
+ suite = ADD_SUITE(suite);
+ abts_run_test(suite, proc_mutex, NULL);
+ return suite;
+}
+#endif /* APR_HAS_FORK */
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