src/offsets.h

   1 /*
   2  * Copyright (c) 2018 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
  24 #ifndef _POSIX_PTHREAD_OFFSETS_H
  25 #define _POSIX_PTHREAD_OFFSETS_H
  26
  27 #ifndef __ASSEMBLER__
  28 #define check_backward_offset(field, value) \
  29                 _Static_assert(offsetof(struct _pthread, tsd) + value == \
  30                                 offsetof(struct _pthread, field), #value " is correct")
  31 #define check_forward_offset(field, value) \
  32                 _Static_assert(offsetof(struct _pthread, field) == value, \
  33                                 #value " is correct")
  34 #else
  35 #define check_backward_offset(field, value)
  36 #define check_forward_offset(field, value)
  37 #endif // __ASSEMBLER__
  38
  39 #if defined(__i386__)
  40 #define _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET   140
  41 #define _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET 144
  42 #elif __LP64__
  43 #define _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET   -48
  44 #define _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET -40
  45 #else
  46 #define _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET   -36
  47 #define _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET -32
  48 #endif
  49
  50 #if defined(__i386__)
  51 check_forward_offset(stackaddr, _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET);
  52 check_forward_offset(stackbottom, _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET);
  53 #else
  54 check_backward_offset(stackaddr, _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET);
  55 check_backward_offset(stackbottom, _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET);
  56 #endif
  57
  58 #endif /* _POSIX_PTHREAD_OFFSETS_H */