unit-tests/test-cases/concurrent-dlopen-initializers/main.c

   1 /*
   2  * Copyright (c) 2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #include <stdio.h>  // fprintf(), NULL
  24 #include <stdlib.h> // exit(), EXIT_SUCCESS
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <mach-o/dyld_priv.h>
  28
  29 #include <dlfcn.h>
  30 #include <pthread.h>
  31
  32 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  33
  34
  35 static void* work(void* libName)
  36 {
  37         for (int i=0; i < 500; ++i) {
  38                 void* handle = dlopen((char*)libName, 0);
  39                 if ( handle == NULL ) {
  40                         FAIL("dlopen failed: %s", dlerror());
  41                         exit(0);
  42                 }
  43                 dlclose(handle);
  44         }
  45
  46         return NULL;
  47 }
  48
  49 static const char* batchMappedHandler(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
  50 {
  51         usleep(10000);
  52         return NULL;
  53 }
  54
  55
  56 int main()
  57 {
  58         // tell dyld we want to know when images are mapped
  59         dyld_register_image_state_change_handler(dyld_image_state_initialized, false, batchMappedHandler);
  60
  61         // other thread dlopens and closes libfoo.dylib 500 times
  62         pthread_t t1;
  63         if ( pthread_create(&t1, NULL, work, "libfoo1.dylib") != 0 ) {
  64                 FAIL("pthread_create failed");
  65                 exit(0);
  66         }
  67
  68         pthread_t t2;
  69         if ( pthread_create(&t2, NULL, work, "libfoo2.dylib") != 0 ) {
  70                 FAIL("pthread_create failed");
  71                 exit(0);
  72         }
  73
  74         pthread_t t3;
  75         if ( pthread_create(&t3, NULL, work, "libfoo3.dylib") != 0 ) {
  76                 FAIL("pthread_create failed");
  77                 exit(0);
  78         }
  79
  80         pthread_t t4;
  81         if ( pthread_create(&t4, NULL, work, "libfoo4.dylib") != 0 ) {
  82                 FAIL("pthread_create failed");
  83                 exit(0);
  84         }
  85
  86         void* result;
  87         pthread_join(t1, &result);
  88         pthread_join(t2, &result);
  89         pthread_join(t3, &result);
  90         pthread_join(t4, &result);
  91
  92         PASS("concurrent-dlopen-initializers");
  93         return 0;
  94 }