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) 2003-2013 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 "thread_dbP.h"
  22 #include <tls.h>
  23
  24 typedef struct pthread pthread;
  25 typedef struct pthread_key_struct pthread_key_struct;
  26 typedef struct pthread_key_data pthread_key_data;
  27 typedef struct
  28 {
  29   struct pthread_key_data data[PTHREAD_KEY_2NDLEVEL_SIZE];
  30 }
  31 pthread_key_data_level2;
  32
  33 typedef struct
  34 {
  35   union dtv dtv[UINT32_MAX / 2 / sizeof (union dtv)]; /* No constant bound.  */
  36 } dtv;
  37
  38 typedef struct link_map link_map;
  39
  40 /* Actually static in nptl/init.c, but we only need it for typeof.  */
  41 extern bool __nptl_initial_report_events;
  42
  43 #define schedparam_sched_priority schedparam.sched_priority
  44
  45 #define eventbuf_eventmask eventbuf.eventmask
  46 #define eventbuf_eventmask_event_bits eventbuf.eventmask.event_bits
  47
  48 #define DESC(name, offset, obj) \
  49   DB_DEFINE_DESC (name, 8 * sizeof (obj), 1, offset);
  50 #define ARRAY_DESC(name, offset, obj) \
  51   DB_DEFINE_DESC (name, \
  52                   8 * sizeof (obj)[0], sizeof (obj) / sizeof (obj)[0], \
  53                   offset);
  54
  55 #if TLS_TCB_AT_TP
  56 # define dtvp header.dtv
  57 #elif TLS_DTV_AT_TP
  58 /* Special case hack.  If TLS_TCB_SIZE == 0 (on PowerPC), there is no TCB
  59    containing the DTV at the TP, but actually the TCB lies behind the TP,
  60    i.e. at the very end of the area covered by TLS_PRE_TCB_SIZE.  */
  61 DESC (_thread_db_pthread_dtvp,
  62       TLS_PRE_TCB_SIZE + offsetof (tcbhead_t, dtv)
  63       - (TLS_TCB_SIZE == 0 ? sizeof (tcbhead_t) : 0), union dtv *)
  64 #endif
  65
  66
  67 #define DB_STRUCT(type) \
  68   const uint32_t _thread_db_sizeof_##type = sizeof (type);
  69 #define DB_STRUCT_FIELD(type, field) \
  70   DESC (_thread_db_##type##_##field, \
  71         offsetof (type, field), ((type *) 0)->field)
  72 #define DB_STRUCT_ARRAY_FIELD(type, field) \
  73   ARRAY_DESC (_thread_db_##type##_##field, \
  74               offsetof (type, field), ((type *) 0)->field)
  75 #define DB_VARIABLE(name) DESC (_thread_db_##name, 0, name)
  76 #define DB_ARRAY_VARIABLE(name) ARRAY_DESC (_thread_db_##name, 0, name)
  77 #define DB_SYMBOL(name) /* Nothing.  */
  78 #define DB_FUNCTION(name) /* Nothing.  */
  79 #include "structs.def"
  80 #undef DB_STRUCT
  81 #undef DB_STRUCT_FIELD
  82 #undef DB_SYMBOL
  83 #undef DB_FUNCTION
  84 #undef DB_VARIABLE
  85 #undef DESC
  86
  87
  88
  89 #ifdef DB_THREAD_SELF
  90 # ifdef DB_THREAD_SELF_INCLUDE
  91 #  include DB_THREAD_SELF_INCLUDE
  92 # endif
  93
  94 /* This macro is defined in the machine's tls.h using the three below.  */
  95 # define CONST_THREAD_AREA(bits, value) \
  96   const uint32_t _thread_db_const_thread_area = (value);
  97 # define REGISTER_THREAD_AREA(bits, regofs, scale) \
  98   DB_DEFINE_DESC (_thread_db_register##bits##_thread_area, \
  99                   bits, (scale), (regofs));
 100 # define REGISTER(bits, size, regofs, bias) \
 101   DB_DEFINE_DESC (_thread_db_register##bits, size, (uint32_t)(bias), (regofs));
 102
 103 DB_THREAD_SELF
 104 #endif