libpthread/nptl_db: debugging support for nptl

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 258 insertions, 0 deletions

diff --git a/libpthread/nptl_db/thread_dbP.h b/libpthread/nptl_db/thread_dbP.h
new file mode 100644
index 000000000..c3d263b0c
--- /dev/null
+++ b/libpthread/nptl_db/thread_dbP.h
@@ -0,0 +1,258 @@
+/* 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#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 */