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         int                                     my_err;
  25         int                                     my_shm_id;
  26         void *                          my_shm_addr = NULL;
  27         struct shmid_ds         my_shmid_ds;
  28
  29         my_shm_id = shmget( IPC_PRIVATE, 4096, (IPC_CREAT | IPC_R | IPC_W) );
  30         if ( my_shm_id == -1 ) {
  31                 printf( "shmget failed with error %d - \"%s\" \n", errno, strerror( errno) );
  32                 goto test_failed_exit;
  33         }
  34
  35         my_shm_addr = shmat( my_shm_id, NULL, SHM_RND );
  36         if ( my_shm_addr == (void *) -1 ) {
  37                 my_shm_addr = NULL;
  38                 printf( "shmat failed with error %d - \"%s\" \n", errno, strerror( errno) );
  39                 goto test_failed_exit;
  40         }
  41
  42         /* try writing to the shared segment */
  43         *((char *) my_shm_addr) = 'A';
  44
  45         my_err = shmctl( my_shm_id, IPC_STAT, &my_shmid_ds );
  46         if ( my_err == -1 ) {
  47                 printf( "shmctl failed with error %d - \"%s\" \n", errno, strerror( errno) );
  48                 goto test_failed_exit;
  49         }
  50         if ( my_shmid_ds.shm_segsz != 4096 ) {
  51                 printf( "shmctl failed get correct shared segment size \n" );
  52                 goto test_failed_exit;
  53         }
  54         if ( getpid( ) != my_shmid_ds.shm_cpid ) {
  55                 printf( "shmctl failed get correct creator pid \n" );
  56                 goto test_failed_exit;
  57         }
  58
  59         my_err = shmdt( my_shm_addr );
  60         if ( my_err == -1 ) {
  61                 printf( "shmdt failed with error %d - \"%s\" \n", errno, strerror( errno) );
  62                 goto test_failed_exit;
  63         }
  64         my_shm_addr = NULL;
  65
  66         my_err = 0;
  67         goto test_passed_exit;
  68
  69 test_failed_exit:
  70         my_err = -1;
  71
  72 test_passed_exit:
  73         if ( my_shm_addr != NULL ) {
  74                 shmdt( my_shm_addr );
  75         }
  76         return( my_err );
  77 }
  78
  79
  80 /*  **************************************************************************************************************
  81  *      Test BSD shared memory system calls.
  82  *  **************************************************************************************************************
  83  */
  84 int bsd_shm_tests( void * the_argp )
  85 {
  86         int                     my_err, i;
  87         int                     my_fd = -1;
  88         char *          my_addr = NULL;
  89         char            my_name[ 64 ];
  90
  91         for ( i = 0; i < 100; i++ ) {
  92                 sprintf( &my_name[0], "bsd_shm_tests_%d", i );
  93                 my_fd = shm_open( &my_name[0], (O_RDWR | O_CREAT | O_EXCL), S_IRWXU );
  94                 if ( my_fd != -1 )
  95                         break;
  96                 my_err = errno;
  97                 if ( my_err != EEXIST ) {
  98                         printf( "shm_open failed with error %d - \"%s\" \n", my_err, strerror( my_err) );
  99                         goto test_failed_exit;
 100                 }
 101         }
 102         if ( my_fd == -1 ) {
 103                 printf( "shm_open failed to open a shared memory object with name \"%s\" \n", &my_name[0] );
 104                 goto test_failed_exit;
 105         }
 106
 107         /* grow shared memory object */
 108         my_err = ftruncate( my_fd, 4096 );
 109         if ( my_err == -1 ) {
 110                 printf( "ftruncate call failed with error %d - \"%s\" \n", errno, strerror( errno) );
 111                 goto test_failed_exit;
 112         }
 113
 114         my_err = shm_unlink( &my_name[0] );
 115         if ( my_err == -1 ) {
 116                 printf( "shm_unlink failed with error %d - \"%s\" \n", errno, strerror( errno) );
 117                 goto test_failed_exit;
 118         }
 119
 120         my_addr = (char *) mmap( NULL, 4096, (PROT_READ | PROT_WRITE), (MAP_FILE | MAP_SHARED), my_fd, 0 );
 121         if ( my_addr == (char *) -1 ) {
 122                 printf( "mmap call failed with error %d - \"%s\" \n", errno, strerror( errno) );
 123                 goto test_failed_exit;
 124         }
 125
 126         my_err = 0;
 127         goto test_passed_exit;
 128
 129 test_failed_exit:
 130         my_err = -1;
 131
 132 test_passed_exit:
 133         if ( my_fd != -1 )
 134                 close( my_fd );
 135         return( my_err );
 136 }
 137