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- /* Private header for thread debug library
- Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #ifndef _THREAD_DBP_H
- #define _THREAD_DBP_H 1
- #include <stdbool.h>
- #include <stdint.h>
- #include <string.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <assert.h>
- #include "proc_service.h"
- #include "thread_db.h"
- #include "../nptl/pthreadP.h" /* This is for *_BITMASK only. */
- #ifdef __UCLIBC__
- #define __alloca alloca
- #endif
- /* Indeces for the symbol names. */
- enum
- {
- # define DB_STRUCT(type) SYM_SIZEOF_##type,
- # define DB_STRUCT_FIELD(type, field) SYM_##type##_FIELD_##field,
- # define DB_SYMBOL(name) SYM_##name,
- # define DB_FUNCTION(name) SYM_##name,
- # define DB_VARIABLE(name) SYM_##name, SYM_DESC_##name,
- # include "structs.def"
- # undef DB_STRUCT
- # undef DB_STRUCT_FIELD
- # undef DB_SYMBOL
- # undef DB_FUNCTION
- # undef DB_VARIABLE
- SYM_TH_UNIQUE_CONST_THREAD_AREA,
- SYM_TH_UNIQUE_REGISTER64,
- SYM_TH_UNIQUE_REGISTER32,
- SYM_TH_UNIQUE_REGISTER64_THREAD_AREA,
- SYM_TH_UNIQUE_REGISTER32_THREAD_AREA,
- SYM_NUM_MESSAGES
- };
- /* Comment out the following for less verbose output. */
- #ifndef NDEBUG
- # define LOG(c) if (__td_debug) write (2, c "\n", strlen (c "\n"))
- extern int __td_debug attribute_hidden;
- #else
- # define LOG(c)
- #endif
- #define DB_DESC_SIZE(desc) ((desc)[0])
- #define DB_DESC_NELEM(desc) ((desc)[1])
- #define DB_DESC_OFFSET(desc) ((desc)[2])
- #define DB_SIZEOF_DESC (3 * sizeof (uint32_t))
- #define DB_DEFINE_DESC(name, size, nelem, offset) \
- const uint32_t name[3] = { (size), (nelem), (offset) }
- typedef uint32_t db_desc_t[3];
- /* Handle for a process. This type is opaque. */
- struct td_thragent
- {
- /* Chain on the list of all agent structures. */
- list_t list;
- /* Delivered by the debugger and we have to pass it back in the
- proc callbacks. */
- struct ps_prochandle *ph;
- /* Cached values read from the inferior. */
- # define DB_STRUCT(type) \
- uint32_t ta_sizeof_##type;
- # define DB_STRUCT_FIELD(type, field) \
- db_desc_t ta_field_##type##_##field;
- # define DB_SYMBOL(name) \
- psaddr_t ta_addr_##name;
- # define DB_FUNCTION(name) \
- psaddr_t ta_addr_##name;
- # define DB_VARIABLE(name) \
- psaddr_t ta_addr_##name; \
- db_desc_t ta_var_##name;
- # include "structs.def"
- # undef DB_STRUCT
- # undef DB_STRUCT_FIELD
- # undef DB_FUNCTION
- # undef DB_SYMBOL
- # undef DB_VARIABLE
- /* The method of locating a thread's th_unique value. */
- enum
- {
- ta_howto_unknown,
- ta_howto_reg,
- ta_howto_reg_thread_area,
- ta_howto_const_thread_area
- } ta_howto;
- union
- {
- uint32_t const_thread_area; /* Constant argument to ps_get_thread_area. */
- /* These are as if the descriptor of the field in prregset_t,
- but DB_DESC_NELEM is overloaded as follows: */
- db_desc_t reg; /* Signed bias applied to register value. */
- db_desc_t reg_thread_area; /* Bits to scale down register value. */
- } ta_howto_data;
- };
- /* List of all known descriptors. */
- extern list_t __td_agent_list attribute_hidden;
- /* Function used to test for correct thread agent pointer. */
- static inline bool
- ta_ok (const td_thragent_t *ta)
- {
- list_t *runp;
- list_for_each (runp, &__td_agent_list)
- if (list_entry (runp, td_thragent_t, list) == ta)
- return true;
- return false;
- }
- /* Internal wrapper around ps_pglobal_lookup. */
- extern ps_err_e td_lookup (struct ps_prochandle *ps,
- int idx, psaddr_t *sym_addr) attribute_hidden;
- /* Store in psaddr_t VAR the address of inferior's symbol NAME. */
- #define DB_GET_SYMBOL(var, ta, name) \
- (((ta)->ta_addr_##name == 0 \
- && td_lookup ((ta)->ph, SYM_##name, &(ta)->ta_addr_##name) != PS_OK) \
- ? TD_ERR : ((var) = (ta)->ta_addr_##name, TD_OK))
- /* Store in psaddr_t VAR the value of ((TYPE) PTR)->FIELD[IDX] in the inferior.
- A target field smaller than psaddr_t is zero-extended. */
- #define DB_GET_FIELD(var, ta, ptr, type, field, idx) \
- _td_fetch_value ((ta), (ta)->ta_field_##type##_##field, \
- SYM_##type##_FIELD_##field, \
- (psaddr_t) 0 + (idx), (ptr), &(var))
- #define DB_GET_FIELD_ADDRESS(var, ta, ptr, type, field, idx) \
- ((var) = (ptr), _td_locate_field ((ta), (ta)->ta_field_##type##_##field, \
- SYM_##type##_FIELD_##field, \
- (psaddr_t) 0 + (idx), &(var)))
- extern td_err_e _td_locate_field (td_thragent_t *ta,
- db_desc_t desc, int descriptor_name,
- psaddr_t idx,
- psaddr_t *address) attribute_hidden;
- /* Like DB_GET_FIELD, but PTR is a local pointer to a structure that
- has already been copied in from the inferior. */
- #define DB_GET_FIELD_LOCAL(var, ta, ptr, type, field, idx) \
- _td_fetch_value_local ((ta), (ta)->ta_field_##type##_##field, \
- SYM_##type##_FIELD_##field, \
- (psaddr_t) 0 + (idx), (ptr), &(var))
- /* Store in psaddr_t VAR the value of variable NAME[IDX] in the inferior.
- A target value smaller than psaddr_t is zero-extended. */
- #define DB_GET_VALUE(var, ta, name, idx) \
- (((ta)->ta_addr_##name == 0 \
- && td_lookup ((ta)->ph, SYM_##name, &(ta)->ta_addr_##name) != PS_OK) \
- ? TD_ERR \
- : _td_fetch_value ((ta), (ta)->ta_var_##name, SYM_DESC_##name, \
- (psaddr_t) 0 + (idx), (ta)->ta_addr_##name, &(var)))
- /* Helper functions for those. */
- extern td_err_e _td_fetch_value (td_thragent_t *ta,
- db_desc_t field, int descriptor_name,
- psaddr_t idx, psaddr_t address,
- psaddr_t *result) attribute_hidden;
- extern td_err_e _td_fetch_value_local (td_thragent_t *ta,
- db_desc_t field,
- int descriptor_name,
- psaddr_t idx, void *address,
- psaddr_t *result) attribute_hidden;
- /* Store psaddr_t VALUE in ((TYPE) PTR)->FIELD[IDX] in the inferior.
- A target field smaller than psaddr_t is zero-extended. */
- #define DB_PUT_FIELD(ta, ptr, type, field, idx, value) \
- _td_store_value ((ta), (ta)->ta_field_##type##_##field, \
- SYM_##type##_FIELD_##field, \
- (psaddr_t) 0 + (idx), (ptr), (value))
- #define DB_PUT_FIELD_LOCAL(ta, ptr, type, field, idx, value) \
- _td_store_value_local ((ta), (ta)->ta_field_##type##_##field, \
- SYM_##type##_FIELD_##field, \
- (psaddr_t) 0 + (idx), (ptr), (value))
- /* Store psaddr_t VALUE in variable NAME[IDX] in the inferior.
- A target field smaller than psaddr_t is zero-extended. */
- #define DB_PUT_VALUE(ta, name, idx, value) \
- (((ta)->ta_addr_##name == 0 \
- && td_lookup ((ta)->ph, SYM_##name, &(ta)->ta_addr_##name) != PS_OK) \
- ? TD_ERR \
- : _td_store_value ((ta), (ta)->ta_var_##name, SYM_DESC_##name, \
- (psaddr_t) 0 + (idx), (ta)->ta_addr_##name, (value)))
- /* Helper functions for those. */
- extern td_err_e _td_store_value (td_thragent_t *ta,
- db_desc_t field, int descriptor_name,
- psaddr_t idx, psaddr_t address,
- psaddr_t value) attribute_hidden;
- extern td_err_e _td_store_value_local (td_thragent_t *ta,
- db_desc_t field, int descriptor_name,
- psaddr_t idx, void *address,
- psaddr_t value) attribute_hidden;
- #define DB_GET_STRUCT(var, ta, ptr, type) \
- ({ td_err_e _err = TD_OK; \
- if ((ta)->ta_sizeof_##type == 0) \
- _err = _td_check_sizeof ((ta), &(ta)->ta_sizeof_##type, \
- SYM_SIZEOF_##type); \
- if (_err == TD_OK) \
- _err = ps_pdread ((ta)->ph, (ptr), \
- (var) = __alloca ((ta)->ta_sizeof_##type), \
- (ta)->ta_sizeof_##type) \
- == PS_OK ? TD_OK : TD_ERR; \
- else \
- (var) = NULL; \
- _err; \
- })
- #define DB_PUT_STRUCT(ta, ptr, type, copy) \
- ({ assert ((ta)->ta_sizeof_##type != 0); \
- ps_pdwrite ((ta)->ph, (ptr), (copy), (ta)->ta_sizeof_##type) \
- == PS_OK ? TD_OK : TD_ERR; \
- })
- extern td_err_e _td_check_sizeof (td_thragent_t *ta, uint32_t *sizep,
- int sizep_name) attribute_hidden;
- extern td_err_e __td_ta_lookup_th_unique (const td_thragent_t *ta,
- lwpid_t lwpid, td_thrhandle_t *th);
- #endif /* thread_dbP.h */
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