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/*--------------------------------------------------------------------*/
/*--- Debug info. pub_core_debuginfo.h ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2017 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, see <http://www.gnu.org/licenses/>.
The GNU General Public License is contained in the file COPYING.
*/
#ifndef __PUB_CORE_DEBUGINFO_H
#define __PUB_CORE_DEBUGINFO_H
//--------------------------------------------------------------------
// PURPOSE: This module deals with reading debug info and symbol tables
// to get file and function names, line numbers, variable types, and
// to help stack unwinding.
//--------------------------------------------------------------------
#include "pub_tool_debuginfo.h"
/* Initialise the entire module. Must be called first of all. */
extern void VG_(di_initialise) ( void );
/* LINUX: Notify the debuginfo system about a new mapping, or the
disappearance of such, or a permissions change on an existing
mapping. This is the way new debug information gets loaded. If
allow_SkFileV is True, it will try load debug info if the mapping
at 'a' belongs to Valgrind; whereas normally (False) it will not do
that. This allows us to carefully control when the thing will read
symbols from the Valgrind executable itself.
If a call to VG_(di_notify_mmap) causes debug info to be read, then
the returned ULong is an abstract handle which can later be used to
refer to the debuginfo read as a result of this specific mapping,
in later queries to m_debuginfo. In this case the handle value
will be one or above. If the returned value is zero, no debug info
was read.
For VG_(di_notify_mmap), if use_fd is not -1, that is used instead
of the filename; this avoids perturbing fcntl locks, which are
released by simply re-opening and closing the same file (even via
different fd!).
*/
#if defined(VGO_linux) || defined(VGO_darwin) || defined(VGO_solaris) || defined(VGO_freebsd)
extern ULong VG_(di_notify_mmap)( Addr a, Bool allow_SkFileV, Int use_fd );
extern void VG_(di_notify_munmap)( Addr a, SizeT len );
extern void VG_(di_notify_mprotect)( Addr a, SizeT len, UInt prot );
/* this should really return ULong, as per VG_(di_notify_mmap). */
extern void VG_(di_notify_pdb_debuginfo)( Int fd, Addr avma,
SizeT total_size,
PtrdiffT bias );
/* this should also really return ULong */
extern void VG_(di_notify_vm_protect)( Addr a, SizeT len, UInt prot );
#endif
extern void VG_(addr_load_di)( Addr a );
extern void VG_(di_load_di)( DebugInfo *di );
extern void VG_(load_di)( DebugInfo *di, Addr a );
extern void VG_(di_discard_ALL_debuginfo)( void );
/* Like VG_(get_fnname), but it does not do C++ demangling nor Z-demangling
* nor below-main renaming.
* It should not be used for any names that will be shown to users.
* It should only be used in cases where the names of interest will have
* particular (ie. non-mangled) forms, or the mangled form is acceptable. */
extern
Bool VG_(get_fnname_raw) ( DiEpoch ep, Addr a, const HChar** buf );
/* Like VG_(get_fnname), but without C++ demangling. (But it does
Z-demangling and below-main renaming.)
iipc argument: same usage as in VG_(describe_IP) in pub_tool_debuginfo.h. */
extern
Bool VG_(get_fnname_no_cxx_demangle) ( DiEpoch ep, Addr a, const HChar** buf,
const InlIPCursor* iipc );
/* mips-linux only: find the offset of current address. This is needed for
stack unwinding for MIPS.
*/
extern
Bool VG_(get_inst_offset_in_function)( DiEpoch ep, Addr a,
/*OUT*/PtrdiffT* offset );
/* Use DWARF2/3 CFA information to do one step of stack unwinding.
D3UnwindRegs holds the current register values, and is
arch-specific. Note that the x86 and amd64 definitions are shared
and so the regs are named 'xip' etc rather than 'eip' and 'rip'. */
#if defined(VGA_amd64) || defined(VGA_x86)
typedef
struct { Addr xip; Addr xsp; Addr xbp; }
D3UnwindRegs;
#elif defined(VGA_arm)
typedef
struct { Addr r15; Addr r14; Addr r13; Addr r12; Addr r11; Addr r7; }
D3UnwindRegs;
#elif defined(VGA_arm64)
typedef
struct { Addr pc; Addr sp; Addr x30; Addr x29; } /* PC, SP, LR, FP */
D3UnwindRegs;
#elif defined(VGA_ppc32) || defined(VGA_ppc64be) || defined(VGA_ppc64le)
typedef
UChar /* should be void, but gcc complains at use points */
D3UnwindRegs;
#elif defined(VGA_s390x)
typedef
struct { Addr ia; Addr sp; Addr fp; Addr lr;
Addr f0; Addr f1; Addr f2; Addr f3;
Addr f4; Addr f5; Addr f6; Addr f7; }
D3UnwindRegs;
#elif defined(VGA_mips32) || defined(VGA_mips64) || defined(VGA_nanomips)
typedef
struct { Addr pc; Addr sp; Addr fp; Addr ra; }
D3UnwindRegs;
#else
# error "Unsupported arch"
#endif
extern Bool VG_(use_CF_info) ( /*MOD*/D3UnwindRegs* uregs,
Addr min_accessible,
Addr max_accessible );
/* returns the "generation" of the debug info.
Each time some debuginfo is changed (e.g. loaded or unloaded),
the VG_(debuginfo_generation)() value returned will be increased.
This can be used to flush cached information derived from debug
info (e.g. CFI info or FPO info or ...). */
extern UInt VG_(debuginfo_generation) (void);
#if defined(VGO_freebsd)
/* Force completion of loading all debuginfo.
Needed on FreeBSD when entering capability mode since
we can't open executable files to get the debuginfo after
entering capability mode. */
extern void VG_(load_all_debuginfo) (void);
#endif
/* True if some FPO information is loaded.
It is useless to call VG_(use_FPO_info) if this returns False.
Note that the return value should preferably be cached in
the stack unwind code, and re-queried when the debug info generation
changes. */
extern Bool VG_(FPO_info_present)(void);
/* Use MSVC FPO data to do one step of stack unwinding. */
extern Bool VG_(use_FPO_info) ( /*MOD*/Addr* ipP,
/*MOD*/Addr* spP,
/*MOD*/Addr* fpP,
DiEpoch ep,
Addr min_accessible,
Addr max_accessible );
/* Print the unwind info (if there is some) for the given address
range [from,to]. */
extern void VG_(ppUnwindInfo) (Addr from, Addr to);
/* AVMAs for a symbol. Usually only the lowest address of the entity.
On ppc64 platforms, also contains tocptr and local_ep.
These fields should only be accessed using the macros
GET_TOCPTR_AVMA/SET_TOCPTR_AVMA/GET_LOCAL_EP_AVMA/SET_LOCAL_EP_AVMA. */
typedef
struct {
Addr main; /* lowest address of entity */
# if defined(VGA_ppc64be) || defined(VGA_ppc64le)
Addr tocptr; /* ppc64be/le-linux only: value that R2 should have */
# endif
# if defined(VGA_ppc64le)
Addr local_ep; /* address for local entry point, ppc64le only */
# endif
}
SymAVMAs;
#if defined(VGA_ppc64be) || defined(VGA_ppc64le)
# define GET_TOCPTR_AVMA(_sym_avmas) (_sym_avmas).tocptr
# define SET_TOCPTR_AVMA(_sym_avmas, _val) (_sym_avmas).tocptr = (_val)
#else
# define GET_TOCPTR_AVMA(_sym_avmas) ((Addr)0)
# define SET_TOCPTR_AVMA(_sym_avmas, _val) /* */
#endif
#if defined(VGA_ppc64le)
# define GET_LOCAL_EP_AVMA(_sym_avmas) (_sym_avmas).local_ep
# define SET_LOCAL_EP_AVMA(_sym_avmas, _val) (_sym_avmas).local_ep = (_val)
#else
# define GET_LOCAL_EP_AVMA(_sym_avmas) ((Addr)0)
# define SET_LOCAL_EP_AVMA(_sym_avmas, _val) /* */
#endif
/* 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*/SymAVMAs* ad,
/*OUT*/UInt* size,
/*OUT*/const HChar** pri_name,
/*OUT*/const HChar*** sec_names,
/*OUT*/Bool* isText,
/*OUT*/Bool* isIFunc,
/*OUT*/Bool* isGlobal );
/* ppc64-linux only: find the TOC pointer (R2 value) that should be in
force at the entry point address of the function containing
guest_code_addr. Returns 0 if not known. */
extern Addr VG_(get_tocptr) ( DiEpoch ep, Addr guest_code_addr );
/* Map a function name to its SymAVMAs. Is done by
sequential search of all symbol tables, so is very slow. To
mitigate the worst performance effects, you may specify a soname
pattern, and only objects matching that pattern are searched.
Therefore specify "*" to search all the objects. On TOC-afflicted
platforms, a symbol is deemed to be found only if it has a nonzero
TOC pointer. */
extern
Bool VG_(lookup_symbol_SLOW)(DiEpoch ep,
const HChar* sopatt, const HChar* name,
SymAVMAs* avmas);
#endif // __PUB_CORE_DEBUGINFO_H
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
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