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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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fc489f1101
(Rusty Russell, rusty@rustcorp.com.au) tdb uses fcntl locks and mmap, and some of the tests fail under valgrind. strace showed valgrind opening the tdb file, reading 1024 bytes, then closing it. This is not allowed: POSIX says if you open and close a file, all fcntl locks on it are dropped (insane, yes). Finally got around to hacking the source to track this down: di_notify_mmap is doing the damage. The simplest fix was to hand in an optional fd for it to use, then have it do pread. I had to fix your pread; surely this should seek back even if the platform doesn't have pread support? git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12224
153 lines
6.1 KiB
C
153 lines
6.1 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- Debug info. pub_core_debuginfo.h ---*/
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/*--------------------------------------------------------------------*/
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2000-2011 Julian Seward
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jseward@acm.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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#ifndef __PUB_CORE_DEBUGINFO_H
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#define __PUB_CORE_DEBUGINFO_H
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//--------------------------------------------------------------------
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// PURPOSE: This module deals with reading debug info and symbol tables
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// to get file and function names, line numbers, variable types, and
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// to help stack unwinding.
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//--------------------------------------------------------------------
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#include "pub_tool_debuginfo.h"
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/* Initialise the entire module. Must be called first of all. */
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extern void VG_(di_initialise) ( void );
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/* LINUX: Notify the debuginfo system about a new mapping, or the
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disappearance of such, or a permissions change on an existing
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mapping. This is the way new debug information gets loaded. If
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allow_SkFileV is True, it will try load debug info if the mapping
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at 'a' belongs to Valgrind; whereas normally (False) it will not do
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that. This allows us to carefully control when the thing will read
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symbols from the Valgrind executable itself.
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If a call to VG_(di_notify_mmap) causes debug info to be read, then
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the returned ULong is an abstract handle which can later be used to
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refer to the debuginfo read as a result of this specific mapping,
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in later queries to m_debuginfo. In this case the handle value
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will be one or above. If the returned value is zero, no debug info
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was read.
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For VG_(di_notify_mmap), if use_fd is not -1, that is used instead
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of the filename; this avoids perturbing fcntl locks, which are
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released by simply re-opening and closing the same file (even via
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different fd!).
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*/
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#if defined(VGO_linux) || defined(VGO_darwin)
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extern ULong VG_(di_notify_mmap)( Addr a, Bool allow_SkFileV, Int use_fd );
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extern void VG_(di_notify_munmap)( Addr a, SizeT len );
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extern void VG_(di_notify_mprotect)( Addr a, SizeT len, UInt prot );
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/* this should really return ULong, as per VG_(di_notify_mmap). */
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extern void VG_(di_notify_pdb_debuginfo)( Int fd, Addr avma,
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SizeT total_size,
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PtrdiffT unknown_purpose__reloc );
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/* this should also really return ULong */
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extern void VG_(di_notify_vm_protect)( Addr a, SizeT len, UInt prot );
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#endif
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extern void VG_(di_discard_ALL_debuginfo)( void );
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/* Like VG_(get_fnname), but it does not do C++ demangling nor Z-demangling
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* nor below-main renaming.
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* It should not be used for any names that will be shown to users.
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* It should only be used in cases where the names of interest will have
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* particular (ie. non-mangled) forms, or the mangled form is acceptable. */
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extern
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Bool VG_(get_fnname_raw) ( Addr a, Char* buf, Int nbuf );
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/* Like VG_(get_fnname), but without C++ demangling. (But it does
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* Z-demangling and below-main renaming.) */
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extern
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Bool VG_(get_fnname_no_cxx_demangle) ( Addr a, Char* buf, Int nbuf );
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/* Use DWARF2/3 CFA information to do one step of stack unwinding.
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D3UnwindRegs holds the current register values, and is
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arch-specific. Note that the x86 and amd64 definitions are shared
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and so the regs are named 'xip' etc rather than 'eip' and 'rip'. */
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#if defined(VGA_amd64) || defined(VGA_x86)
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typedef
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struct { Addr xip; Addr xsp; Addr xbp; }
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D3UnwindRegs;
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#elif defined(VGA_arm)
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typedef
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struct { Addr r15; Addr r14; Addr r13; Addr r12; Addr r11; Addr r7; }
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D3UnwindRegs;
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#elif defined(VGA_ppc32) || defined(VGA_ppc64)
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typedef
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UChar /* should be void, but gcc complains at use points */
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D3UnwindRegs;
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#elif defined(VGA_s390x)
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typedef
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struct { Addr ia; Addr sp; Addr fp; Addr lr;}
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D3UnwindRegs;
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#else
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# error "Unsupported arch"
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#endif
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extern Bool VG_(use_CF_info) ( /*MOD*/D3UnwindRegs* uregs,
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Addr min_accessible,
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Addr max_accessible );
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/* Use MSVC FPO data to do one step of stack unwinding. */
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extern Bool VG_(use_FPO_info) ( /*MOD*/Addr* ipP,
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/*MOD*/Addr* spP,
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/*MOD*/Addr* fpP,
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Addr min_accessible,
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Addr max_accessible );
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/* ppc64-linux only: find the TOC pointer (R2 value) that should be in
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force at the entry point address of the function containing
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guest_code_addr. Returns 0 if not known. */
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extern Addr VG_(get_tocptr) ( Addr guest_code_addr );
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/* Map a function name to its entry point and toc pointer. Is done by
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sequential search of all symbol tables, so is very slow. To
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mitigate the worst performance effects, you may specify a soname
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pattern, and only objects matching that pattern are searched.
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Therefore specify "*" to search all the objects. On TOC-afflicted
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platforms, a symbol is deemed to be found only if it has a nonzero
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TOC pointer. */
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extern
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Bool VG_(lookup_symbol_SLOW)(UChar* sopatt, UChar* name, Addr* pEnt, Addr* pToc);
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#endif // __PUB_CORE_DEBUGINFO_H
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/*--------------------------------------------------------------------*/
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/*--- end ---*/
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/*--------------------------------------------------------------------*/
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