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) 2003-2014 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
  25 typedef struct pthread pthread;
  26 typedef struct pthread_key_struct pthread_key_struct;
  27 typedef struct pthread_key_data pthread_key_data;
  28 typedef struct
  29 {
  30   struct pthread_key_data data[PTHREAD_KEY_2NDLEVEL_SIZE];
  31 }
  32 pthread_key_data_level2;
  33
  34 typedef struct
  35 {
  36   union dtv dtv[UINT32_MAX / 2 / sizeof (union dtv)]; /* No constant bound.  */
  37 } dtv;
  38
  39 typedef struct link_map link_map;
  40
  41 /* Actually static in nptl/init.c, but we only need it for typeof.  */
  42 extern bool __nptl_initial_report_events;
  43
  44 #define schedparam_sched_priority schedparam.sched_priority
  45
  46 #define eventbuf_eventmask eventbuf.eventmask
  47 #define eventbuf_eventmask_event_bits eventbuf.eventmask.event_bits
  48
  49 #define DESC(name, offset, obj) \
  50   DB_DEFINE_DESC (name, 8 * sizeof (obj), 1, offset);
  51 #define ARRAY_DESC(name, offset, obj) \
  52   DB_DEFINE_DESC (name, \
  53                   8 * sizeof (obj)[0], sizeof (obj) / sizeof (obj)[0], \
  54                   offset);
  55
  56 #if TLS_TCB_AT_TP
  57 # define dtvp header.dtv
  58 #elif TLS_DTV_AT_TP
  59 /* Special case hack.  If TLS_TCB_SIZE == 0 (on PowerPC), there is no TCB
  60    containing the DTV at the TP, but actually the TCB lies behind the TP,
  61    i.e. at the very end of the area covered by TLS_PRE_TCB_SIZE.  */
  62 DESC (_thread_db_pthread_dtvp,
  63       TLS_PRE_TCB_SIZE + offsetof (tcbhead_t, dtv)
  64       - (TLS_TCB_SIZE == 0 ? sizeof (tcbhead_t) : 0), union dtv *)
  65 #endif
  66
  67
  68 #define DB_STRUCT(type) \
  69   const uint32_t _thread_db_sizeof_##type = sizeof (type);
  70 #define DB_STRUCT_FIELD(type, field) \
  71   DESC (_thread_db_##type##_##field, \
  72         offsetof (type, field), ((type *) 0)->field)
  73 #define DB_STRUCT_ARRAY_FIELD(type, field) \
  74   ARRAY_DESC (_thread_db_##type##_##field, \
  75               offsetof (type, field), ((type *) 0)->field)
  76 #define DB_VARIABLE(name) DESC (_thread_db_##name, 0, name)
  77 #define DB_ARRAY_VARIABLE(name) ARRAY_DESC (_thread_db_##name, 0, name)
  78 #define DB_SYMBOL(name) /* Nothing.  */
  79 #define DB_FUNCTION(name) /* Nothing.  */
  80 #include "structs.def"
  81 #undef DB_STRUCT
  82 #undef DB_STRUCT_FIELD
  83 #undef DB_SYMBOL
  84 #undef DB_FUNCTION
  85 #undef DB_VARIABLE
  86 #undef DESC
  87
  88
  89
  90 #ifdef DB_THREAD_SELF
  91 # ifdef DB_THREAD_SELF_INCLUDE
  92 #  include DB_THREAD_SELF_INCLUDE
  93 # endif
  94
  95 /* This macro is defined in the machine's tls.h using the three below.  */
  96 # define CONST_THREAD_AREA(bits, value) \
  97   const uint32_t _thread_db_const_thread_area = (value);
  98 # define REGISTER_THREAD_AREA(bits, regofs, scale) \
  99   DB_DEFINE_DESC (_thread_db_register##bits##_thread_area, \
 100                   bits, (scale), (regofs));
 101 # define REGISTER(bits, size, regofs, bias) \
 102   DB_DEFINE_DESC (_thread_db_register##bits, size, (uint32_t)(bias), (regofs));
 103
 104 DB_THREAD_SELF
 105 #endif