1  /* This file is included by pthread_create.c to define in libpthread
       2     all the magic symbols required by libthread_db.
       3  
       4     Copyright (C) 2003-2023 Free Software Foundation, Inc.
       5     This file is part of the GNU C Library.
       6  
       7     The GNU C Library is free software; you can redistribute it and/or
       8     modify it under the terms of the GNU Lesser General Public
       9     License as published by the Free Software Foundation; either
      10     version 2.1 of the License, or (at your option) any later version.
      11  
      12     The GNU C Library is distributed in the hope that it will be useful,
      13     but WITHOUT ANY WARRANTY; without even the implied warranty of
      14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15     Lesser General Public License for more details.
      16  
      17     You should have received a copy of the GNU Lesser General Public
      18     License along with the GNU C Library; if not, see
      19     <https://www.gnu.org/licenses/>.  */
      20  
      21  #include <stdint.h>
      22  #include "thread_dbP.h"
      23  #include <tls.h>
      24  #include <ldsodefs.h>
      25  
      26  typedef struct pthread pthread;
      27  typedef struct pthread_key_struct pthread_key_struct;
      28  typedef struct pthread_key_data pthread_key_data;
      29  typedef struct
      30  {
      31    struct pthread_key_data data[PTHREAD_KEY_2NDLEVEL_SIZE];
      32  }
      33  pthread_key_data_level2;
      34  
      35  typedef struct
      36  {
      37    union dtv dtv[UINT32_MAX / 2 / sizeof (union dtv)]; /* No constant bound.  */
      38  } dtv;
      39  
      40  typedef struct link_map link_map;
      41  typedef struct rtld_global rtld_global;
      42  typedef struct dtv_slotinfo_list dtv_slotinfo_list;
      43  typedef struct dtv_slotinfo dtv_slotinfo;
      44  
      45  #define schedparam_sched_priority schedparam.sched_priority
      46  
      47  #define eventbuf_eventmask eventbuf.eventmask
      48  #define eventbuf_eventmask_event_bits eventbuf.eventmask.event_bits
      49  
      50  #define DESC(name, offset, obj) \
      51    DB_DEFINE_DESC (name, 8 * sizeof (obj), 1, offset);
      52  #define ARRAY_DESC(name, offset, obj) \
      53    DB_DEFINE_DESC (name, \
      54  		  8 * sizeof (obj)[0], sizeof (obj) / sizeof (obj)[0], \
      55  		  offset);
      56  /* Flexible arrays do not have a length that can be determined.  */
      57  #define FLEXIBLE_ARRAY_DESC(name, offset, obj) \
      58    DB_DEFINE_DESC (name, 8 * sizeof (obj)[0], 0, offset);
      59  
      60  #if TLS_TCB_AT_TP
      61  # define dtvp header.dtv
      62  #elif TLS_DTV_AT_TP
      63  /* Special case hack.  If TLS_TCB_SIZE == 0 (on PowerPC), there is no TCB
      64     containing the DTV at the TP, but actually the TCB lies behind the TP,
      65     i.e. at the very end of the area covered by TLS_PRE_TCB_SIZE.  */
      66  DESC (_thread_db_pthread_dtvp,
      67        TLS_PRE_TCB_SIZE + offsetof (tcbhead_t, dtv)
      68        - (TLS_TCB_SIZE == 0 ? sizeof (tcbhead_t) : 0), union dtv *)
      69  #endif
      70  
      71  
      72  #define DB_STRUCT(type) \
      73    const uint32_t _thread_db_sizeof_##type = sizeof (type);
      74  #define DB_STRUCT_FIELD(type, field) \
      75    DESC (_thread_db_##type##_##field, \
      76  	offsetof (type, field), ((type *) 0)->field)
      77  #define DB_STRUCT_ARRAY_FIELD(type, field) \
      78    ARRAY_DESC (_thread_db_##type##_##field, \
      79  	      offsetof (type, field), ((type *) 0)->field)
      80  #define DB_STRUCT_FLEXIBLE_ARRAY(type, field) \
      81    FLEXIBLE_ARRAY_DESC (_thread_db_##type##_##field, \
      82  		       offsetof (type, field), ((type *) 0)->field)
      83  #define DB_VARIABLE(name) DESC (_thread_db_##name, 0, name)
      84  #define DB_ARRAY_VARIABLE(name) ARRAY_DESC (_thread_db_##name, 0, name)
      85  #define DB_SYMBOL(name)	/* Nothing.  */
      86  #define DB_FUNCTION(name) /* Nothing.  */
      87  #include "structs.def"
      88  #undef DB_STRUCT
      89  #undef DB_STRUCT_FIELD
      90  #undef DB_SYMBOL
      91  #undef DB_FUNCTION
      92  #undef DB_VARIABLE
      93  #undef DESC
      94  
      95  
      96  
      97  #ifdef DB_THREAD_SELF
      98  # ifdef DB_THREAD_SELF_INCLUDE
      99  #  include DB_THREAD_SELF_INCLUDE
     100  # endif
     101  
     102  /* This macro is defined in the machine's tls.h using the three below.  */
     103  # define CONST_THREAD_AREA(bits, value) \
     104    const uint32_t _thread_db_const_thread_area = (value);
     105  # define REGISTER_THREAD_AREA(bits, regofs, scale) \
     106    DB_DEFINE_DESC (_thread_db_register##bits##_thread_area, \
     107  		  bits, (scale), (regofs));
     108  # define REGISTER(bits, size, regofs, bias) \
     109    DB_DEFINE_DESC (_thread_db_register##bits, size, (uint32_t)(bias), (regofs));
     110  
     111  DB_THREAD_SELF
     112  #endif