blob: 4f7a09daebec77a4ca58d0343bace90934aa41fe [file] [log] [blame]
/*--- DebugInfo. pub_tool_debuginfo.h ---*/
This file is part of Valgrind, a dynamic binary instrumentation
Copyright (C) 2000-2013 Julian Seward
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
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.
#include "pub_tool_basics.h" // VG_ macro
/*=== 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, HChar* filename, Int n_filename );
extern Bool VG_(get_fnname) ( Addr a, HChar* fnname, Int n_fnname );
extern Bool VG_(get_linenum) ( Addr a, UInt* linenum );
extern Bool VG_(get_fnname_w_offset)
( Addr a, HChar* fnname, Int n_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, in which case dirname_available must also be
NULL. If dirname is non-null, directory info is written to it, if
it is available; if not available, '\0' is written to the first
byte. In either case *dirname_available is set to indicate whether
or not directory information was available.
Returned value indicates whether any filename/line info could be
found. */
extern Bool VG_(get_filename_linenum)
( Addr a,
/*OUT*/HChar* filename, Int n_filename,
/*OUT*/HChar* dirname, Int n_dirname,
/*OUT*/Bool* dirname_available,
/*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, HChar* fnname, Int n_fnname );
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) ( 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*/HChar* dname, Int n_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*/ void* /* really, XArray* of HChar */ dname1v,
/*MOD*/ void* /* really, 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, HChar* objname, Int n_objname );
/* Cursor allowing to describe inlined function calls at an IP,
by doing successive calls to VG_(describe_IP). */
typedef struct _InlIPCursor InlIPCursor;
/* 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'.
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 {
VG_(describe_IP)(eip, buf, n_buf, iipc);
... use buf ...
} while (VG_(next_IIPC)(iipc));
To only describe eip, without the inlined calls at eip, give a NULL iipc:
VG_(describe_IP)(eip, buf, n_buf, NULL);
extern HChar* VG_(describe_IP)(Addr eip, HChar* buf, Int n_buf,
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. */
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) */
extern void* /* really, 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. */
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) */
extern void* /* really, 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 );
/* Functions for traversing all the symbols in a DebugInfo. _howmany
tells how many symbol table entries there are. _getidx retrieves
the n'th entry, for n in 0 .. _howmany-1. You may not modify the
function names thereby acquired; if you want to do so, first strdup
them. The primary name is returned in *pri_name, and *sec_names is
set either to NULL or to a NULL terminated vector containing
pointers to the secondary names. */
Int VG_(DebugInfo_syms_howmany) ( const DebugInfo *di );
void VG_(DebugInfo_syms_getidx) ( const DebugInfo *di,
Int idx,
/*OUT*/Addr* avma,
/*OUT*/Addr* tocptr,
/*OUT*/UInt* size,
/*OUT*/HChar** pri_name,
/*OUT*/HChar*** sec_names,
/*OUT*/Bool* isText,
/*OUT*/Bool* isIFunc );
/* A simple enumeration to describe the 'kind' of various kinds of
segments that arise from the mapping of object files. */
enum {
/* 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 last n_name-1
characters of the object's name is put in name[0 .. n_name-2], and
name[n_name-1] is set to zero (guaranteed zero terminated). */
VgSectKind VG_(DebugInfo_sect_kind)( /*OUT*/HChar* name, SizeT n_name,
Addr a);
/*--- end ---*/