1 /* 2 This file is part of drd, a thread error detector. 3 4 Copyright (C) 2006-2012 Bart Van Assche <bvanassche (at) acm.org>. 5 6 This program is free software; you can redistribute it and/or 7 modify it under the terms of the GNU General Public License as 8 published by the Free Software Foundation; either version 2 of the 9 License, or (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307, USA. 20 21 The GNU General Public License is contained in the file COPYING. 22 */ 23 24 25 #ifndef __SEGMENT_H 26 #define __SEGMENT_H 27 28 29 /* 30 * Segments and segment lists. A segment represents information about 31 * a contiguous group of statements of a specific thread. There is a vector 32 * clock associated with each segment. 33 */ 34 35 36 #include "drd_vc.h" 37 #include "pub_drd_bitmap.h" 38 #include "pub_tool_execontext.h" // ExeContext 39 #include "pub_tool_stacktrace.h" // StackTrace 40 41 42 typedef struct segment 43 { 44 struct segment* g_next; 45 struct segment* g_prev; 46 /** Pointers to next and previous segments executed by the same thread. */ 47 struct segment* thr_next; 48 struct segment* thr_prev; 49 DrdThreadId tid; 50 /** Reference count: number of pointers that point to this segment. */ 51 int refcnt; 52 /** Stack trace of the first instruction of the segment. */ 53 ExeContext* stacktrace; 54 /** Vector clock associated with the segment. */ 55 VectorClock vc; 56 /** 57 * Bitmap representing the memory accesses by the instructions associated 58 * with the segment. 59 */ 60 struct bitmap bm; 61 } Segment; 62 63 extern Segment* DRD_(g_sg_list); 64 65 Segment* DRD_(sg_new)(const DrdThreadId creator, const DrdThreadId created); 66 static int DRD_(sg_get_refcnt)(const Segment* const sg); 67 Segment* DRD_(sg_get)(Segment* const sg); 68 void DRD_(sg_put)(Segment* const sg); 69 static struct bitmap* DRD_(sg_bm)(Segment* const sg); 70 void DRD_(sg_merge)(Segment* const sg1, Segment* const sg2); 71 void DRD_(sg_print)(Segment* const sg); 72 Bool DRD_(sg_get_trace)(void); 73 void DRD_(sg_set_trace)(const Bool trace_segment); 74 ULong DRD_(sg_get_segments_created_count)(void); 75 ULong DRD_(sg_get_segments_alive_count)(void); 76 ULong DRD_(sg_get_max_segments_alive_count)(void); 77 ULong DRD_(sg_get_segment_merge_count)(void); 78 79 80 /** Query the reference count of the specified segment. */ 81 static __inline__ int DRD_(sg_get_refcnt)(const Segment* const sg) 82 { 83 #ifdef ENABLE_DRD_CONSISTENCY_CHECKS 84 tl_assert(sg); 85 #endif 86 87 return sg->refcnt; 88 } 89 90 /** Return the pointer to the bitmap of the segment. */ 91 static __inline__ struct bitmap* DRD_(sg_bm)(Segment* const sg) 92 { 93 #ifdef ENABLE_DRD_CONSISTENCY_CHECKS 94 tl_assert(sg); 95 #endif 96 97 return &sg->bm; 98 } 99 100 101 102 #endif // __SEGMENT_H 103
