nptl_db/db_info.c

   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) 2003-2018 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    <http://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 /* Actually static in nptl/init.c, but we only need it for typeof.  */
  46 extern bool __nptl_initial_report_events;
  47
  48 #define schedparam_sched_priority schedparam.sched_priority
  49
  50 #define eventbuf_eventmask eventbuf.eventmask
  51 #define eventbuf_eventmask_event_bits eventbuf.eventmask.event_bits
  52
  53 #define DESC(name, offset, obj) \
  54   DB_DEFINE_DESC (name, 8 * sizeof (obj), 1, offset);
  55 #define ARRAY_DESC(name, offset, obj) \
  56   DB_DEFINE_DESC (name, \
  57                   8 * sizeof (obj)[0], sizeof (obj) / sizeof (obj)[0], \
  58                   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_VARIABLE(name) DESC (_thread_db_##name, 0, name)
  81 #define DB_ARRAY_VARIABLE(name) ARRAY_DESC (_thread_db_##name, 0, name)
  82 #define DB_SYMBOL(name) /* Nothing.  */
  83 #define DB_FUNCTION(name) /* Nothing.  */
  84 #include "structs.def"
  85 #undef DB_STRUCT
  86 #undef DB_STRUCT_FIELD
  87 #undef DB_SYMBOL
  88 #undef DB_FUNCTION
  89 #undef DB_VARIABLE
  90 #undef DESC
  91
  92
  93
  94 #ifdef DB_THREAD_SELF
  95 # ifdef DB_THREAD_SELF_INCLUDE
  96 #  include DB_THREAD_SELF_INCLUDE
  97 # endif
  98
  99 /* This macro is defined in the machine's tls.h using the three below.  */
 100 # define CONST_THREAD_AREA(bits, value) \
 101   const uint32_t _thread_db_const_thread_area = (value);
 102 # define REGISTER_THREAD_AREA(bits, regofs, scale) \
 103   DB_DEFINE_DESC (_thread_db_register##bits##_thread_area, \
 104                   bits, (scale), (regofs));
 105 # define REGISTER(bits, size, regofs, bias) \
 106   DB_DEFINE_DESC (_thread_db_register##bits, size, (uint32_t)(bias), (regofs));
 107
 108 DB_THREAD_SELF
 109 #endif