1 /* 2 This file is part of drd, a thread error detector. 3 4 Copyright (C) 2006-2017 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 #include "drd_suppression.h" 26 #include "pub_drd_bitmap.h" 27 #include "pub_tool_libcassert.h" // tl_assert() 28 #include "pub_tool_stacktrace.h" // VG_(get_and_pp_StackTrace)() 29 #include "pub_tool_threadstate.h" // VG_(get_running_tid)() 30 #include "pub_tool_libcprint.h" // Vg_DebugMsg 31 32 33 /* Global variables. */ 34 35 Bool DRD_(g_any_address_traced) = False; 36 37 38 /* Local variables. */ 39 40 static struct bitmap* s_suppressed; 41 static struct bitmap* s_traced; 42 static Bool s_trace_suppression; 43 44 45 /* Function definitions. */ 46 47 void DRD_(suppression_set_trace)(const Bool trace_suppression) 48 { 49 s_trace_suppression = trace_suppression; 50 } 51 52 void DRD_(suppression_init)(void) 53 { 54 tl_assert(s_suppressed == 0); 55 tl_assert(s_traced == 0); 56 s_suppressed = DRD_(bm_new)(); 57 s_traced = DRD_(bm_new)(); 58 tl_assert(s_suppressed); 59 tl_assert(s_traced); 60 } 61 62 void DRD_(start_suppression)(const Addr a1, const Addr a2, 63 const HChar* const reason) 64 { 65 if (s_trace_suppression) 66 VG_(message)(Vg_DebugMsg, "start suppression of 0x%lx sz %lu (%s)\n", 67 a1, a2 - a1, reason); 68 69 tl_assert(a1 <= a2); 70 DRD_(bm_access_range_store)(s_suppressed, a1, a2); 71 } 72 73 void DRD_(finish_suppression)(const Addr a1, const Addr a2) 74 { 75 if (s_trace_suppression) { 76 VG_(message)(Vg_DebugMsg, "finish suppression of 0x%lx sz %lu\n", 77 a1, a2 - a1); 78 VG_(get_and_pp_StackTrace)(VG_(get_running_tid)(), 12); 79 } 80 81 tl_assert(a1 <= a2); 82 DRD_(bm_clear_store)(s_suppressed, a1, a2); 83 } 84 85 /** 86 * Return true if data race detection suppression has been requested for all 87 * bytes in the range a1 .. a2 - 1 inclusive. Return false in case the range 88 * is only partially suppressed or not suppressed at all. 89 */ 90 Bool DRD_(is_suppressed)(const Addr a1, const Addr a2) 91 { 92 return DRD_(bm_has)(s_suppressed, a1, a2, eStore); 93 } 94 95 /** 96 * Return true if data race detection suppression has been requested for any 97 * of the bytes in the range a1 .. a2 - 1 inclusive. Return false in case none 98 * of the bytes in the specified range is suppressed. 99 */ 100 Bool DRD_(is_any_suppressed)(const Addr a1, const Addr a2) 101 { 102 return DRD_(bm_has_any_store)(s_suppressed, a1, a2); 103 } 104 105 void DRD_(mark_hbvar)(const Addr a1) 106 { 107 DRD_(bm_access_range_load)(s_suppressed, a1, a1 + 1); 108 } 109 110 Bool DRD_(range_contains_suppression_or_hbvar)(const Addr a1, const Addr a2) 111 { 112 return DRD_(bm_has_any_access)(s_suppressed, a1, a2); 113 } 114 115 /** 116 * Start tracing memory accesses in the range [a1,a2). If persistent == True, 117 * keep tracing even after memory deallocation and reallocation. 118 */ 119 void DRD_(start_tracing_address_range)(const Addr a1, const Addr a2, 120 const Bool persistent) 121 { 122 tl_assert(a1 <= a2); 123 124 if (s_trace_suppression) 125 VG_(message)(Vg_DebugMsg, "start_tracing(0x%lx, %lu) %s\n", 126 a1, a2 - a1, persistent ? "persistent" : "non-persistent"); 127 128 DRD_(bm_access_range_load)(s_traced, a1, a2); 129 if (persistent) 130 DRD_(bm_access_range_store)(s_traced, a1, a2); 131 if (!DRD_(g_any_address_traced) && a1 < a2) 132 DRD_(g_any_address_traced) = True; 133 } 134 135 /** 136 * Stop tracing memory accesses in the range [a1,a2). 137 */ 138 void DRD_(stop_tracing_address_range)(const Addr a1, const Addr a2) 139 { 140 tl_assert(a1 <= a2); 141 142 if (s_trace_suppression) 143 VG_(message)(Vg_DebugMsg, "stop_tracing(0x%lx, %lu)\n", 144 a1, a2 - a1); 145 146 if (DRD_(g_any_address_traced)) { 147 DRD_(bm_clear)(s_traced, a1, a2); 148 DRD_(g_any_address_traced) = DRD_(bm_has_any_load_g)(s_traced); 149 } 150 } 151 152 Bool DRD_(is_any_traced)(const Addr a1, const Addr a2) 153 { 154 return DRD_(bm_has_any_access)(s_traced, a1, a2); 155 } 156 157 /** 158 * Stop using the memory range [a1,a2). Stop tracing memory accesses to 159 * non-persistent address ranges. 160 */ 161 void DRD_(suppression_stop_using_mem)(const Addr a1, const Addr a2) 162 { 163 if (s_trace_suppression) { 164 Addr b; 165 for (b = a1; b < a2; b++) { 166 if (DRD_(bm_has_1)(s_suppressed, b, eStore)) { 167 VG_(message)(Vg_DebugMsg, 168 "stop_using_mem(0x%lx, %lu) finish suppression of" 169 " 0x%lx\n", a1, a2 - a1, b); 170 } 171 } 172 } 173 tl_assert(a1); 174 tl_assert(a1 <= a2); 175 DRD_(bm_clear)(s_suppressed, a1, a2); 176 DRD_(bm_clear_load)(s_traced, a1, a2); 177 } 178
