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Diffstat (limited to 'REORG.TODO/nptl_db/thread_dbP.h')
| -rw-r--r-- | REORG.TODO/nptl_db/thread_dbP.h | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/REORG.TODO/nptl_db/thread_dbP.h b/REORG.TODO/nptl_db/thread_dbP.h new file mode 100644 index 0000000000..c88ee2923f --- /dev/null +++ b/REORG.TODO/nptl_db/thread_dbP.h @@ -0,0 +1,268 @@ +/* Private header for thread debug library + Copyright (C) 2003-2017 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. */ +#include <list.h> +#include <gnu/lib-names.h> +#include <libc-diag.h> + +/* 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 wrappers around ps_pglobal_lookup. */ +extern ps_err_e td_mod_lookup (struct ps_prochandle *ps, const char *modname, + int idx, psaddr_t *sym_addr) attribute_hidden; +#define td_lookup(ps, idx, sym_addr) \ + td_mod_lookup ((ps), LIBPTHREAD_SO, (idx), (sym_addr)) + + +/* 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)) + +/* With GCC 5.3 when compiling with -Os the compiler emits a warning + that slot may be used uninitialized. This is never the case since + the dynamic loader initializes the slotinfo list and + dtv_slotinfo_list will point slot at the first entry. Therefore + when DB_GET_FIELD_ADDRESS is called with a slot for ptr, the slot is + always initialized. */ +DIAG_PUSH_NEEDS_COMMENT; +DIAG_IGNORE_Os_NEEDS_COMMENT (5, "-Wmaybe-uninitialized"); +#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))) +DIAG_POP_NEEDS_COMMENT; + +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 */ |