mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
synced 2026-02-05 03:07:56 +00:00
be052139d6
At startup valgrind fetches the current working directory and stashes it away to be used later (in debug messages, read config files or create log files). But if the current working directory didn't exist (or there was some other error getting its path) then valgrind would go in an endless loop. This was caused by assuming that any error meant a larger buffer needed to be created to store the cwd path (ERANGE). However there could be other reasons calling getcwd failed. Fix this by only looping and resizing the buffer when the error is ERANGE. Any other error just means we cannot fetch and store the current working directory. Fix all callers to check get_startup_wd() returns NULL. Only abort startup if a relative path needs to be used for user supplied relative log files. Debug messages will just show "<NO CWD>". And skip reading any config files from the startup_wd if it doesn't exist. Also add a new testcase that tests executing valgrind in a deep, inaccessible and/or non-existing directory (none/tests/nocwd.vgtest). git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15989
115 lines
4.7 KiB
C
115 lines
4.7 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- File/socket-related libc stuff. pub_core_libcfile.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) 2000-2015 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_LIBCFILE_H
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#define __PUB_CORE_LIBCFILE_H
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//--------------------------------------------------------------------
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// PURPOSE: This module contains all the libc code that relates to
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// files and sockets: opening, reading, writing, etc.
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// To use, you must first include: pub_core_vki.h
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//--------------------------------------------------------------------
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#include "pub_tool_libcfile.h"
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/* Move an fd into the Valgrind-safe range */
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extern Int VG_(safe_fd) ( Int oldfd );
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extern Int VG_(fcntl) ( Int fd, Int cmd, Addr arg );
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/* Convert an fd into a filename */
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extern Bool VG_(resolve_filename) ( Int fd, const HChar** buf );
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/* Return the size of a file, or -1 in case of error */
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extern Long VG_(fsize) ( Int fd );
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/* Lookup an extended attribute for a file */
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extern SysRes VG_(getxattr) ( const HChar* file_name, const HChar* attr_name,
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Addr attr_value, SizeT attr_value_len );
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/* Is the file a directory? */
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extern Bool VG_(is_dir) ( const HChar* f );
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/* Default destination port to be used in logging over a network, if
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none specified. */
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#define VG_CLO_DEFAULT_LOGPORT 1500
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extern Int VG_(connect_via_socket)( const HChar* str );
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extern UInt VG_(htonl) ( UInt x );
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extern UInt VG_(ntohl) ( UInt x );
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extern UShort VG_(htons) ( UShort x );
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extern UShort VG_(ntohs) ( UShort x );
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extern Int VG_(socket) ( Int domain, Int type, Int protocol );
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extern Int VG_(write_socket)( Int sd, const void *msg, Int count );
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extern Int VG_(getsockname) ( Int sd, struct vki_sockaddr *name, Int *namelen );
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extern Int VG_(getpeername) ( Int sd, struct vki_sockaddr *name, Int *namelen );
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extern Int VG_(getsockopt) ( Int sd, Int level, Int optname,
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void *optval, Int *optlen );
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extern Int VG_(setsockopt) ( Int sd, Int level, Int optname,
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void *optval, Int optlen );
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extern Int VG_(access) ( const HChar* path, Bool irusr, Bool iwusr,
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Bool ixusr );
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/* Is the file executable? Returns: 0 = success, non-0 is failure */
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extern Int VG_(check_executable)(/*OUT*/Bool* is_setuid,
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const HChar* f, Bool allow_setuid);
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/* DDD: Note this moves (or at least, is believed to move) the file
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pointer on Linux but doesn't on Darwin. This inconsistency should
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be fixed. (In other words, why isn't the Linux version implemented
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in terms of pread()?) */
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extern SysRes VG_(pread) ( Int fd, void* buf, Int count, OffT offset );
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/* Size of fullname buffer needed for a call to VG_(mkstemp) with
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part_of_name having the given part_of_name_len. */
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extern SizeT VG_(mkstemp_fullname_bufsz) ( SizeT part_of_name_len );
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/* Create and open (-rw------) a tmp file name incorporating said arg.
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Returns -1 on failure, else the fd of the file. The file name is
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written to the memory pointed to be fullname. The number of bytes written
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is equal to VG_(mkstemp_fullname_bufsz)(VG_(strlen)(part_of_name)). */
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extern Int VG_(mkstemp) ( const HChar* part_of_name, /*OUT*/HChar* fullname );
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/* Record the process' working directory at startup. Is intended to
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be called exactly once, at startup, before the working directory
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changes. The saved value can later be acquired by calling
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VG_(get_startup_wd) (in pub_tool_libcfile.h). Note that might
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return if the working directory couldn't be found. */
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extern void VG_(record_startup_wd) ( void );
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#endif // __PUB_CORE_LIBCFILE_H
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/*--------------------------------------------------------------------*/
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/*--- end ---*/
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/*--------------------------------------------------------------------*/
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