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/*
This file is part of drd, a thread error detector.
Copyright (C) 2006-2012 Bart Van Assche <bvanassche@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, 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.
*/
#ifndef __SEGMENT_H
#define __SEGMENT_H
/*
* Segments and segment lists. A segment represents information about
* a contiguous group of statements of a specific thread. There is a vector
* clock associated with each segment.
*/
#include "drd_vc.h"
#include "pub_drd_bitmap.h"
#include "pub_tool_execontext.h" // ExeContext
#include "pub_tool_stacktrace.h" // StackTrace
typedef struct segment
{
struct segment* g_next;
struct segment* g_prev;
/** Pointers to next and previous segments executed by the same thread. */
struct segment* thr_next;
struct segment* thr_prev;
DrdThreadId tid;
/** Reference count: number of pointers that point to this segment. */
int refcnt;
/** Stack trace of the first instruction of the segment. */
ExeContext* stacktrace;
/** Vector clock associated with the segment. */
VectorClock vc;
/**
* Bitmap representing the memory accesses by the instructions associated
* with the segment.
*/
struct bitmap bm;
} Segment;
extern Segment* DRD_(g_sg_list);
Segment* DRD_(sg_new)(const DrdThreadId creator, const DrdThreadId created);
static int DRD_(sg_get_refcnt)(const Segment* const sg);
Segment* DRD_(sg_get)(Segment* const sg);
void DRD_(sg_put)(Segment* const sg);
static struct bitmap* DRD_(sg_bm)(Segment* const sg);
void DRD_(sg_merge)(Segment* const sg1, Segment* const sg2);
void DRD_(sg_print)(Segment* const sg);
Bool DRD_(sg_get_trace)(void);
void DRD_(sg_set_trace)(const Bool trace_segment);
ULong DRD_(sg_get_segments_created_count)(void);
ULong DRD_(sg_get_segments_alive_count)(void);
ULong DRD_(sg_get_max_segments_alive_count)(void);
ULong DRD_(sg_get_segment_merge_count)(void);
/** Query the reference count of the specified segment. */
static __inline__ int DRD_(sg_get_refcnt)(const Segment* const sg)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
tl_assert(sg);
#endif
return sg->refcnt;
}
/** Return the pointer to the bitmap of the segment. */
static __inline__ struct bitmap* DRD_(sg_bm)(Segment* const sg)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
tl_assert(sg);
#endif
return &sg->bm;
}
#endif // __SEGMENT_H