include/pub_tool_debuginfo.h

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/*--- DebugInfo.                              pub_tool_debuginfo.h ---*/
/*--------------------------------------------------------------------*/

/*
   This file is part of Valgrind, a dynamic binary instrumentation
   framework.

   Copyright (C) 2000-2005 Julian Seward
      jseward@acm.org

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   This program 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.

   The GNU General Public License is contained in the file COPYING.
*/

#ifndef __PUB_TOOL_DEBUGINFO_H
#define __PUB_TOOL_DEBUGINFO_H

/*====================================================================*/
/*=== Obtaining debug information                                  ===*/
/*====================================================================*/

/* Get the file/function/line number of the instruction at address
   'a'.  For these four, if debug info for the address is found, it
   copies the info into the buffer/UInt and returns True.  If not, it
   returns False and nothing is copied.  VG_(get_fnname) always
   demangles C++ function names.  VG_(get_fnname_w_offset) is the
   same, except it appends "+N" to symbol names to indicate offsets.  */
extern Bool VG_(get_filename) ( Addr a, Char* filename, Int n_filename );
extern Bool VG_(get_fnname)   ( Addr a, Char* fnname,   Int n_fnname   );
extern Bool VG_(get_linenum)  ( Addr a, UInt* linenum );
extern Bool VG_(get_fnname_w_offset)
                              ( Addr a, Char* fnname,   Int n_fnname   );

/* This one is more efficient if getting both filename and line number,
   because the two lookups are done together. */
extern Bool VG_(get_filename_linenum)
                              ( Addr a, Char* filename, Int n_filename,
                                        UInt* linenum );

/* Succeeds only if we find from debug info that 'a' is the address of the
   first instruction in a function -- as opposed to VG_(get_fnname) which
   succeeds if we find from debug info that 'a' is the address of any
   instruction in a function.  Use this to instrument the start of
   a particular function.  Nb: if an executable/shared object is stripped
   of its symbols, this function will not be able to recognise function
   entry points within it. */
extern Bool VG_(get_fnname_if_entry) ( Addr a, Char* fnname, Int n_fnname );

/* Succeeds if the address is within a shared object or the main executable.
   It doesn't matter if debug info is present or not. */
extern Bool VG_(get_objname)  ( Addr a, Char* objname,  Int n_objname  );

/* Puts into 'buf' info about the code address %eip:  the address, function
   name (if known) and filename/line number (if known), like this:

      0x4001BF05: realloc (vg_replace_malloc.c:339)

   'n_buf' gives length of 'buf'.  Returns 'buf'.
*/
extern Char* VG_(describe_IP)(Addr eip, Char* buf, Int n_buf);

/* Returns a string containing an expression for the given
   address. String is malloced with VG_(malloc)() */
Char *VG_(describe_addr)(ThreadId, Addr);

/*====================================================================*/
/*=== Obtaining segment information                                ===*/
/*====================================================================*/

/* A way to get information about what segments are mapped */
typedef struct _SegInfo SegInfo;

/* Returns NULL if the SegInfo isn't found.  It doesn't matter if debug info
   is present or not. */
extern SegInfo* VG_(get_obj)  ( Addr a );

extern const SegInfo* VG_(next_seginfo)  ( const SegInfo *si );
extern       Addr     VG_(seg_start)     ( const SegInfo *si );
extern       SizeT    VG_(seg_size)      ( const SegInfo *si );
extern const UChar*   VG_(seg_filename)  ( const SegInfo *si );
extern       ULong    VG_(seg_sym_offset)( const SegInfo *si );

typedef
   enum {
      Vg_SectUnknown,
      Vg_SectText,
      Vg_SectData,
      Vg_SectBSS,
      Vg_SectGOT,
      Vg_SectPLT
   }
   VgSectKind;

extern VgSectKind VG_(seg_sect_kind)(Addr);

#endif   // __PUB_TOOL_DEBUGINFO_H

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/*--- end                                                          ---*/
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