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/*--- DebugInfo. pub_tool_debuginfo.h ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2015 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
#include "pub_tool_basics.h" // VG_ macro
#include "pub_tool_xarray.h" // XArray
/*====================================================================*/
/*=== 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. 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, const HChar** filename );
extern Bool VG_(get_fnname) ( Addr a, const HChar** fnname );
extern Bool VG_(get_linenum) ( Addr a, UInt* linenum );
extern Bool VG_(get_fnname_w_offset)
( Addr a, const HChar** fnname );
/* This one is the most general. It gives filename, line number and
optionally directory name. filename and linenum may not be NULL.
dirname may be NULL, meaning that the caller does not want
directory name info.
If dirname is non-null, directory info is written to *dirname, if
it is available; if not available, '\0' is written to the first
byte.
The character strings returned in *filename and *dirname are not
persistent. They will be freed when the DebugInfo they belong to
is discarded.
Returned value indicates whether any filename/line info could be
found. */
extern Bool VG_(get_filename_linenum)
( Addr a,
/*OUT*/const HChar** filename,
/*OUT*/const HChar** dirname,
/*OUT*/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, const HChar** fnname );
typedef
enum {
Vg_FnNameNormal, // A normal function.
Vg_FnNameMain, // "main"
Vg_FnNameBelowMain // Something below "main", eg. __libc_start_main.
} Vg_FnNameKind; // Such names are often filtered.
/* Indicates what kind of fnname it is. */
extern Vg_FnNameKind VG_(get_fnname_kind) ( const HChar* name );
/* Like VG_(get_fnname_kind), but takes a code address. */
extern Vg_FnNameKind VG_(get_fnname_kind_from_IP) ( Addr ip );
/* Looks up data_addr in the collection of data symbols, and if found
puts its name (or as much as will fit) into dname[0 .. n_dname-1],
which is guaranteed to be zero terminated. Also data_addr's offset
from the symbol start is put into *offset. */
extern Bool VG_(get_datasym_and_offset)( Addr data_addr,
/*OUT*/const HChar** dname,
/*OUT*/PtrdiffT* offset );
/* Try to form some description of DATA_ADDR by looking at the DWARF3
debug info we have. This considers all global variables, and 8
frames in the stacks of all threads. Result is written at the ends
of DNAME{1,2}V, which are XArray*s of HChar, that have been
initialised by the caller, and True is returned. If no description
is created, False is returned. Regardless of the return value,
DNAME{1,2}V are guaranteed to be zero terminated after the call.
Note that after the call, DNAME{1,2} may have more than one
trailing zero, so callers should establish the useful text length
using VG_(strlen) on the contents, rather than VG_(sizeXA) on the
XArray itself.
*/
Bool VG_(get_data_description)(
/*MOD*/ XArray* /* of HChar */ dname1v,
/*MOD*/ XArray* /* of HChar */ dname2v,
Addr data_addr
);
/* 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, const HChar** objname );
/* Cursor allowing to describe inlined function calls at an IP,
by doing successive calls to VG_(describe_IP). */
typedef struct _InlIPCursor InlIPCursor;
/* Returns 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)
eip can possibly corresponds to inlined function call(s).
To describe eip and the inlined function calls, the following must
be done:
InlIPCursor *iipc = VG_(new_IIPC)(eip);
do {
buf = VG_(describe_IP)(eip, iipc);
... use buf ...
} while (VG_(next_IIPC)(iipc));
VG_(delete_IIPC)(iipc);
To only describe eip, without the inlined calls at eip, give a NULL iipc:
buf = VG_(describe_IP)(eip, NULL);
Note, that the returned string is allocated in a static buffer local to
VG_(describe_IP). That buffer will be overwritten with every invocation.
Therefore, callers need to possibly stash away the string.
*/
extern const HChar* VG_(describe_IP)(Addr eip, const InlIPCursor* iipc);
/* Builds a IIPC (Inlined IP Cursor) to describe eip and all the inlined calls
at eip. Such a cursor must be deleted after use using VG_(delete_IIPC). */
extern InlIPCursor* VG_(new_IIPC)(Addr eip);
/* Move the cursor to the next call to describe.
Returns True if there are still calls to describe.
False if nothing to describe anymore. */
extern Bool VG_(next_IIPC)(InlIPCursor *iipc);
/* Free all memory associated with iipc. */
extern void VG_(delete_IIPC)(InlIPCursor *iipc);
/* Get an XArray of StackBlock which describe the stack (auto) blocks
for this ip. The caller is expected to free the XArray at some
point. If 'arrays_only' is True, only array-typed blocks are
returned; otherwise blocks of all types are returned. */
typedef
struct {
PtrdiffT base; /* offset from sp or fp */
SizeT szB; /* size in bytes */
Bool spRel; /* True => sp-rel, False => fp-rel */
Bool isVec; /* does block have an array type, or not? */
HChar name[16]; /* first 15 chars of name (asciiz) */
}
StackBlock;
extern XArray* /* of StackBlock */
VG_(di_get_stack_blocks_at_ip)( Addr ip, Bool arrays_only );
/* Get an array of GlobalBlock which describe the global blocks owned
by the shared object characterised by the given di_handle. Asserts
if the handle is invalid. The caller is responsible for freeing
the array at some point. If 'arrays_only' is True, only
array-typed blocks are returned; otherwise blocks of all types are
returned. */
typedef
struct {
Addr addr;
SizeT szB;
Bool isVec; /* does block have an array type, or not? */
HChar name[16]; /* first 15 chars of name (asciiz) */
HChar soname[16]; /* first 15 chars of name (asciiz) */
}
GlobalBlock;
extern XArray* /* of GlobalBlock */
VG_(di_get_global_blocks_from_dihandle) ( ULong di_handle,
Bool arrays_only );
/*====================================================================*/
/*=== Obtaining debug information ===*/
/*====================================================================*/
/* A way to make limited debuginfo queries on a per-mapped-object
basis. */
typedef struct _DebugInfo DebugInfo;
/* Returns NULL if the DebugInfo isn't found. It doesn't matter if
debug info is present or not. */
DebugInfo* VG_(find_DebugInfo) ( Addr a );
/* Fish bits out of DebugInfos. */
Addr VG_(DebugInfo_get_text_avma) ( const DebugInfo *di );
SizeT VG_(DebugInfo_get_text_size) ( const DebugInfo *di );
Addr VG_(DebugInfo_get_bss_avma) ( const DebugInfo *di );
SizeT VG_(DebugInfo_get_bss_size) ( const DebugInfo *di );
Addr VG_(DebugInfo_get_plt_avma) ( const DebugInfo *di );
SizeT VG_(DebugInfo_get_plt_size) ( const DebugInfo *di );
Addr VG_(DebugInfo_get_gotplt_avma) ( const DebugInfo *di );
SizeT VG_(DebugInfo_get_gotplt_size) ( const DebugInfo *di );
Addr VG_(DebugInfo_get_got_avma) ( const DebugInfo *di );
SizeT VG_(DebugInfo_get_got_size) ( const DebugInfo *di );
const HChar* VG_(DebugInfo_get_soname) ( const DebugInfo *di );
const HChar* VG_(DebugInfo_get_filename) ( const DebugInfo *di );
PtrdiffT VG_(DebugInfo_get_text_bias) ( const DebugInfo *di );
/* Function for traversing the DebugInfo list. When called with NULL
it returns the first element; otherwise it returns the given
element's successor. Note that the order of elements in the list
changes in response to most of the queries listed in this header,
that explicitly or implicitly have to search the list for a
particular code address. So it isn't safe to assume that the order
of the list stays constant. */
const DebugInfo* VG_(next_DebugInfo) ( const DebugInfo *di );
/* A simple enumeration to describe the 'kind' of various kinds of
segments that arise from the mapping of object files. */
typedef
enum {
Vg_SectUnknown,
Vg_SectText,
Vg_SectData,
Vg_SectBSS,
Vg_SectGOT,
Vg_SectPLT,
Vg_SectGOTPLT,
Vg_SectOPD
}
VgSectKind;
/* Convert a VgSectKind to a string, which must be copied if you want
to change it. */
const HChar* VG_(pp_SectKind)( VgSectKind kind );
/* Given an address 'a', make a guess of which section of which object
it comes from. If name is non-NULL, then the object's name is put
into *name. The returned name is persistent as long as the debuginfo
it belongs to isn't discarded. */
VgSectKind VG_(DebugInfo_sect_kind)( /*OUT*/const HChar** name, Addr a);
#endif // __PUB_TOOL_DEBUGINFO_H
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/*--- end ---*/
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