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|
/*--------------------------------------------------------------------*/
/*--- Definitions for Locks and Threads. ---*/
/*--- hg_lock_n_thread.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Helgrind, a Valgrind tool for detecting errors
in threaded programs.
Copyright (C) 2007-2010 OpenWorks Ltd
info@open-works.co.uk
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.
*/
#include "pub_tool_basics.h"
#include "pub_tool_libcbase.h"
#include "pub_tool_libcassert.h"
#include "pub_tool_execontext.h"
#include "pub_tool_threadstate.h"
#include "pub_tool_wordfm.h"
#include "hg_basics.h"
#include "hg_wordset.h"
#include "hg_lock_n_thread.h" /* self */
/*----------------------------------------------------------------*/
/*--- Sanity checking ---*/
/*----------------------------------------------------------------*/
inline Bool HG_(is_sane_Thread) ( Thread* thr ) {
return thr != NULL && thr->magic == Thread_MAGIC;
}
static Bool is_sane_Bag_of_Threads ( WordBag* bag )
{
Thread* thr;
Word count;
VG_(initIterBag)( bag );
while (VG_(nextIterBag)( bag, (Word*)&thr, &count )) {
if (count < 1) return False;
if (!HG_(is_sane_Thread)(thr)) return False;
}
VG_(doneIterBag)( bag );
return True;
}
static Bool is_sane_Lock_BASE ( Lock* lock )
{
if (lock == NULL
|| (lock->magic != LockN_MAGIC && lock->magic != LockP_MAGIC))
return False;
switch (lock->kind) {
case LK_mbRec: case LK_nonRec: case LK_rdwr: break;
default: return False;
}
if (lock->heldBy == NULL) {
if (lock->acquired_at != NULL) return False;
/* Unheld. We arbitrarily require heldW to be False. */
return !lock->heldW;
} else {
if (lock->acquired_at == NULL) return False;
}
/* If heldBy is non-NULL, we require it to contain at least one
thread. */
if (VG_(isEmptyBag)(lock->heldBy))
return False;
/* Lock is either r- or w-held. */
if (!is_sane_Bag_of_Threads(lock->heldBy))
return False;
if (lock->heldW) {
/* Held in write-mode */
if ((lock->kind == LK_nonRec || lock->kind == LK_rdwr)
&& !VG_(isSingletonTotalBag)(lock->heldBy))
return False;
} else {
/* Held in read-mode */
if (lock->kind != LK_rdwr) return False;
}
return True;
}
Bool HG_(is_sane_LockP) ( Lock* lock ) {
return lock != NULL
&& lock->magic == LockP_MAGIC
&& lock->hbso == NULL
&& is_sane_Lock_BASE(lock);
}
Bool HG_(is_sane_LockN) ( Lock* lock ) {
return lock != NULL
&& lock->magic == LockN_MAGIC
&& lock->hbso != NULL
&& is_sane_Lock_BASE(lock);
}
Bool HG_(is_sane_LockNorP) ( Lock* lock ) {
return is_sane_Lock_BASE(lock);
}
/*--------------------------------------------------------------------*/
/*--- end hg_lock_n_thread.c ---*/
/*--------------------------------------------------------------------*/
|
