tools/tests/xnu_quick_test/shared_memory_tests.c

   1 /*
   2  *  shared_memory_tests.c
   3  *  xnu_quick_test
   4  *
   5  *  Created by Jerry Cottingham on 6/2/2005.
   6  *  Copyright 2005 Apple Computer Inc. All rights reserved.
   7  *
   8  */
   9
  10 #include "tests.h"
  11 #include <sys/ipc.h>
  12 #include <sys/mman.h>
  13 #include <sys/shm.h>
  14
  15 extern char  g_target_path[ PATH_MAX ];
  16
  17
  18 /*  **************************************************************************************************************
  19  *      Test shmat, shmctl, shmdt, shmget system calls.
  20  *  **************************************************************************************************************
  21  */
  22 int shm_tests( void * the_argp )
  23 {
  24 #if !TARGET_OS_EMBEDDED
  25         int                                     my_err;
  26         int                                     my_shm_id;
  27         void *                          my_shm_addr = NULL;
  28         struct shmid_ds         my_shmid_ds;
  29
  30         my_shm_id = shmget( IPC_PRIVATE, 4096, (IPC_CREAT | IPC_R | IPC_W) );
  31         if ( my_shm_id == -1 ) {
  32                 printf( "shmget failed with error %d - \"%s\" \n", errno, strerror( errno) );
  33                 goto test_failed_exit;
  34         }
  35
  36         my_shm_addr = shmat( my_shm_id, NULL, SHM_RND );
  37         if ( my_shm_addr == (void *) -1 ) {
  38                 my_shm_addr = NULL;
  39                 printf( "shmat failed with error %d - \"%s\" \n", errno, strerror( errno) );
  40                 goto test_failed_exit;
  41         }
  42
  43         /* try writing to the shared segment */
  44         *((char *) my_shm_addr) = 'A';
  45
  46         my_err = shmctl( my_shm_id, IPC_STAT, &my_shmid_ds );
  47         if ( my_err == -1 ) {
  48                 printf( "shmctl failed with error %d - \"%s\" \n", errno, strerror( errno) );
  49                 goto test_failed_exit;
  50         }
  51         if ( my_shmid_ds.shm_segsz != 4096 ) {
  52                 printf( "shmctl failed get correct shared segment size \n" );
  53                 goto test_failed_exit;
  54         }
  55         if ( getpid( ) != my_shmid_ds.shm_cpid ) {
  56                 printf( "shmctl failed get correct creator pid \n" );
  57                 goto test_failed_exit;
  58         }
  59
  60         my_err = shmdt( my_shm_addr );
  61         if ( my_err == -1 ) {
  62                 printf( "shmdt failed with error %d - \"%s\" \n", errno, strerror( errno) );
  63                 goto test_failed_exit;
  64         }
  65         my_shm_addr = NULL;
  66
  67         my_err = 0;
  68         goto test_passed_exit;
  69
  70 test_failed_exit:
  71         my_err = -1;
  72
  73 test_passed_exit:
  74         if ( my_shm_addr != NULL ) {
  75                 shmdt( my_shm_addr );
  76         }
  77         return( my_err );
  78 #else
  79         printf( "\t--> Not supported on EMBEDDED TARGET\n" );
  80         return 0;
  81 #endif
  82 }
  83
  84
  85 /*  **************************************************************************************************************
  86  *      Test BSD shared memory system calls.
  87  *  **************************************************************************************************************
  88  */
  89 int bsd_shm_tests( void * the_argp )
  90 {
  91         int                     my_err, i;
  92         int                     my_fd = -1;
  93         char *          my_addr = NULL;
  94         char            my_name[ 64 ];
  95
  96         for ( i = 0; i < 100; i++ ) {
  97                 sprintf( &my_name[0], "bsd_shm_tests_%d", i );
  98                 my_fd = shm_open( &my_name[0], (O_RDWR | O_CREAT | O_EXCL), S_IRWXU );
  99                 if ( my_fd != -1 )
 100                         break;
 101                 my_err = errno;
 102                 if ( my_err != EEXIST ) {
 103                         printf( "shm_open failed with error %d - \"%s\" \n", my_err, strerror( my_err) );
 104                         goto test_failed_exit;
 105                 }
 106         }
 107         if ( my_fd == -1 ) {
 108                 printf( "shm_open failed to open a shared memory object with name \"%s\" \n", &my_name[0] );
 109                 goto test_failed_exit;
 110         }
 111
 112         /* grow shared memory object */
 113         my_err = ftruncate( my_fd, 4096 );
 114         if ( my_err == -1 ) {
 115                 printf( "ftruncate call failed with error %d - \"%s\" \n", errno, strerror( errno) );
 116                 goto test_failed_exit;
 117         }
 118
 119         my_err = shm_unlink( &my_name[0] );
 120         if ( my_err == -1 ) {
 121                 printf( "shm_unlink failed with error %d - \"%s\" \n", errno, strerror( errno) );
 122                 goto test_failed_exit;
 123         }
 124
 125         my_addr = (char *) mmap( NULL, 4096, (PROT_READ | PROT_WRITE), (MAP_FILE | MAP_SHARED), my_fd, 0 );
 126         if ( my_addr == (char *) -1 ) {
 127                 printf( "mmap call failed with error %d - \"%s\" \n", errno, strerror( errno) );
 128                 goto test_failed_exit;
 129         }
 130
 131         my_err = 0;
 132         goto test_passed_exit;
 133
 134 test_failed_exit:
 135         my_err = -1;
 136
 137 test_passed_exit:
 138         if ( my_fd != -1 )
 139                 close( my_fd );
 140         return( my_err );
 141 }
 142