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 (at) 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 43 typedef 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 63 Segment* DRD_(sg_new)(const DrdThreadId creator, const DrdThreadId created); 64 static int DRD_(sg_get_refcnt)(const Segment* const sg); 65 Segment* DRD_(sg_get)(Segment* const sg); 66 void DRD_(sg_put)(Segment* const sg); 67 static struct bitmap* DRD_(sg_bm)(Segment* const sg); 68 void DRD_(sg_merge)(Segment* const sg1, Segment* const sg2); 69 void DRD_(sg_print)(Segment* const sg); 70 Bool DRD_(sg_get_trace)(void); 71 void DRD_(sg_set_trace)(const Bool trace_segment); 72 ULong DRD_(sg_get_segments_created_count)(void); 73 ULong DRD_(sg_get_segments_alive_count)(void); 74 ULong DRD_(sg_get_max_segments_alive_count)(void); 75 ULong DRD_(sg_get_segment_merge_count)(void); 76 77 78 /** Query the reference count of the specified segment. */ 79 static __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. */ 89 static __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
