1/* -*- mode: C; c-basic-offset: 3; indent-tabs-mode: nil; -*- */ 2/* 3 This file is part of drd, a thread error detector. 4 5 Copyright (C) 2006-2011 Bart Van Assche <bvanassche@acm.org>. 6 7 This program is free software; you can redistribute it and/or 8 modify it under the terms of the GNU General Public License as 9 published by the Free Software Foundation; either version 2 of the 10 License, or (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 20 02111-1307, USA. 21 22 The GNU General Public License is contained in the file COPYING. 23*/ 24 25 26#ifndef __SEGMENT_H 27#define __SEGMENT_H 28 29 30/* 31 * Segments and segment lists. A segment represents information about 32 * a contiguous group of statements of a specific thread. There is a vector 33 * clock associated with each segment. 34 */ 35 36 37#include "drd_vc.h" 38#include "pub_drd_bitmap.h" 39#include "pub_tool_execontext.h" // ExeContext 40#include "pub_tool_stacktrace.h" // StackTrace 41 42 43typedef struct segment 44{ 45 /** Pointers to next and previous segments executed by the same thread. */ 46 struct segment* next; 47 struct segment* prev; 48 DrdThreadId tid; 49 /** Reference count: number of pointers that point to this segment. */ 50 int refcnt; 51 /** Stack trace of the first instruction of the segment. */ 52 ExeContext* stacktrace; 53 /** Vector clock associated with the segment. */ 54 VectorClock vc; 55 /** 56 * Bitmap representing the memory accesses by the instructions associated 57 * with the segment. 58 */ 59 struct bitmap bm; 60} Segment; 61 62 63Segment* DRD_(sg_new)(const DrdThreadId creator, const DrdThreadId created); 64static int DRD_(sg_get_refcnt)(const Segment* const sg); 65Segment* DRD_(sg_get)(Segment* const sg); 66void DRD_(sg_put)(Segment* const sg); 67static struct bitmap* DRD_(sg_bm)(Segment* const sg); 68void DRD_(sg_merge)(Segment* const sg1, Segment* const sg2); 69void DRD_(sg_print)(Segment* const sg); 70Bool DRD_(sg_get_trace)(void); 71void DRD_(sg_set_trace)(const Bool trace_segment); 72ULong DRD_(sg_get_segments_created_count)(void); 73ULong DRD_(sg_get_segments_alive_count)(void); 74ULong DRD_(sg_get_max_segments_alive_count)(void); 75ULong DRD_(sg_get_segment_merge_count)(void); 76 77 78/** Query the reference count of the specified segment. */ 79static __inline__ int DRD_(sg_get_refcnt)(const Segment* const sg) 80{ 81#ifdef ENABLE_DRD_CONSISTENCY_CHECKS 82 tl_assert(sg); 83#endif 84 85 return sg->refcnt; 86} 87 88/** Return the pointer to the bitmap of the segment. */ 89static __inline__ struct bitmap* DRD_(sg_bm)(Segment* const sg) 90{ 91#ifdef ENABLE_DRD_CONSISTENCY_CHECKS 92 tl_assert(sg); 93#endif 94 95 return &sg->bm; 96} 97 98 99 100#endif // __SEGMENT_H 101