/* Private header for thread debug library Copyright (C) 2003, 2004 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; #endif /* thread_dbP.h */