bart | 922304f | 2011-03-13 12:02:44 +0000 | [diff] [blame^] | 1 | /* -*- mode: C; c-basic-offset: 3; indent-tabs-mode: nil; -*- */ |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 2 | /* |
bart | 86562bd | 2009-02-16 19:43:56 +0000 | [diff] [blame] | 3 | This file is part of drd, a thread error detector. |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 4 | |
bart | 922304f | 2011-03-13 12:02:44 +0000 | [diff] [blame^] | 5 | Copyright (C) 2006-2011 Bart Van Assche <bvanassche@acm.org>. |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 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 | #include "drd_clientobj.h" |
| 27 | #include "drd_error.h" |
| 28 | #include "drd_rwlock.h" |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 29 | #include "pub_tool_vki.h" |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 30 | #include "pub_tool_errormgr.h" // VG_(maybe_record_error)() |
| 31 | #include "pub_tool_libcassert.h" // tl_assert() |
| 32 | #include "pub_tool_libcprint.h" // VG_(message)() |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 33 | #include "pub_tool_libcproc.h" // VG_(read_millisecond_timer)() |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 34 | #include "pub_tool_machine.h" // VG_(get_IP)() |
| 35 | #include "pub_tool_mallocfree.h" // VG_(malloc)(), VG_(free)() |
| 36 | #include "pub_tool_threadstate.h" // VG_(get_running_tid)() |
| 37 | |
| 38 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 39 | /* Local type definitions. */ |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 40 | |
| 41 | struct rwlock_thread_info |
| 42 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 43 | UWord tid; // DrdThreadId. |
| 44 | UInt reader_nesting_count; |
| 45 | UInt writer_nesting_count; |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 46 | // Segment of last unlock call by this thread that unlocked a writer lock. |
| 47 | Segment* latest_wrlocked_segment; |
| 48 | // Segment of last unlock call by this thread that unlocked a reader lock. |
| 49 | Segment* latest_rdlocked_segment; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 50 | }; |
| 51 | |
| 52 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 53 | /* Local functions. */ |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 54 | |
bart | d2c5eae | 2009-02-21 15:27:04 +0000 | [diff] [blame] | 55 | static void rwlock_cleanup(struct rwlock_info* p); |
| 56 | static void rwlock_delete_thread(struct rwlock_info* const p, |
| 57 | const DrdThreadId tid); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 58 | |
| 59 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 60 | /* Local variables. */ |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 61 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 62 | static Bool DRD_(s_trace_rwlock); |
| 63 | static UInt DRD_(s_exclusive_threshold_ms); |
| 64 | static UInt DRD_(s_shared_threshold_ms); |
| 65 | static ULong DRD_(s_rwlock_segment_creation_count); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 66 | |
| 67 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 68 | /* Function definitions. */ |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 69 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 70 | void DRD_(rwlock_set_trace)(const Bool trace_rwlock) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 71 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 72 | tl_assert(trace_rwlock == False || trace_rwlock == True); |
| 73 | DRD_(s_trace_rwlock) = trace_rwlock; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 74 | } |
| 75 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 76 | void DRD_(rwlock_set_exclusive_threshold)(const UInt exclusive_threshold_ms) |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 77 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 78 | DRD_(s_exclusive_threshold_ms) = exclusive_threshold_ms; |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 79 | } |
| 80 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 81 | void DRD_(rwlock_set_shared_threshold)(const UInt shared_threshold_ms) |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 82 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 83 | DRD_(s_shared_threshold_ms) = shared_threshold_ms; |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 84 | } |
| 85 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 86 | static Bool DRD_(rwlock_is_rdlocked)(struct rwlock_info* p) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 87 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 88 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 89 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 90 | VG_(OSetGen_ResetIter)(p->thread_info); |
| 91 | for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; ) |
| 92 | { |
| 93 | return q->reader_nesting_count > 0; |
| 94 | } |
| 95 | return False; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 96 | } |
| 97 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 98 | static Bool DRD_(rwlock_is_wrlocked)(struct rwlock_info* p) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 99 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 100 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 101 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 102 | VG_(OSetGen_ResetIter)(p->thread_info); |
| 103 | for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; ) |
| 104 | { |
| 105 | return q->writer_nesting_count > 0; |
| 106 | } |
| 107 | return False; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 108 | } |
| 109 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 110 | static Bool DRD_(rwlock_is_locked)(struct rwlock_info* p) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 111 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 112 | return DRD_(rwlock_is_rdlocked)(p) || DRD_(rwlock_is_wrlocked)(p); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 113 | } |
| 114 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 115 | static Bool DRD_(rwlock_is_rdlocked_by)(struct rwlock_info* p, |
| 116 | const DrdThreadId tid) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 117 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 118 | const UWord uword_tid = tid; |
| 119 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 120 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 121 | q = VG_(OSetGen_Lookup)(p->thread_info, &uword_tid); |
| 122 | return q && q->reader_nesting_count > 0; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 123 | } |
| 124 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 125 | static Bool DRD_(rwlock_is_wrlocked_by)(struct rwlock_info* p, |
| 126 | const DrdThreadId tid) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 127 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 128 | const UWord uword_tid = tid; |
| 129 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 130 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 131 | q = VG_(OSetGen_Lookup)(p->thread_info, &uword_tid); |
| 132 | return q && q->writer_nesting_count > 0; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 133 | } |
| 134 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 135 | static Bool DRD_(rwlock_is_locked_by)(struct rwlock_info* p, |
| 136 | const DrdThreadId tid) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 137 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 138 | return (DRD_(rwlock_is_rdlocked_by)(p, tid) |
| 139 | || DRD_(rwlock_is_wrlocked_by)(p, tid)); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 140 | } |
| 141 | |
bart | 165b90f | 2008-05-10 12:54:27 +0000 | [diff] [blame] | 142 | /** Either look up or insert a node corresponding to DRD thread id 'tid'. */ |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 143 | static |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 144 | struct rwlock_thread_info* |
| 145 | DRD_(lookup_or_insert_node)(OSet* oset, const UWord tid) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 146 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 147 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 148 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 149 | q = VG_(OSetGen_Lookup)(oset, &tid); |
| 150 | if (q == 0) |
| 151 | { |
| 152 | q = VG_(OSetGen_AllocNode)(oset, sizeof(*q)); |
| 153 | q->tid = tid; |
| 154 | q->reader_nesting_count = 0; |
| 155 | q->writer_nesting_count = 0; |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 156 | q->latest_wrlocked_segment = 0; |
| 157 | q->latest_rdlocked_segment = 0; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 158 | VG_(OSetGen_Insert)(oset, q); |
| 159 | } |
| 160 | tl_assert(q); |
| 161 | return q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 162 | } |
| 163 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 164 | /** |
| 165 | * Combine the vector clock corresponding to the last unlock operation of |
| 166 | * reader-writer lock p into the vector clock of thread 'tid'. |
bart | 165b90f | 2008-05-10 12:54:27 +0000 | [diff] [blame] | 167 | */ |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 168 | static void DRD_(rwlock_combine_other_vc)(struct rwlock_info* const p, |
| 169 | const DrdThreadId tid, |
| 170 | const Bool readers_too) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 171 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 172 | struct rwlock_thread_info* q; |
bart | 8f822af | 2009-06-08 18:20:42 +0000 | [diff] [blame] | 173 | VectorClock old_vc; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 174 | |
bart | 8f822af | 2009-06-08 18:20:42 +0000 | [diff] [blame] | 175 | DRD_(vc_copy)(&old_vc, &DRD_(g_threadinfo)[tid].last->vc); |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 176 | VG_(OSetGen_ResetIter)(p->thread_info); |
| 177 | for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; ) |
| 178 | { |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 179 | if (q->tid != tid) |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 180 | { |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 181 | if (q->latest_wrlocked_segment) |
| 182 | { |
| 183 | DRD_(vc_combine)(&DRD_(g_threadinfo)[tid].last->vc, |
| 184 | &q->latest_wrlocked_segment->vc); |
| 185 | } |
| 186 | if (readers_too && q->latest_rdlocked_segment) |
| 187 | { |
| 188 | DRD_(vc_combine)(&DRD_(g_threadinfo)[tid].last->vc, |
| 189 | &q->latest_rdlocked_segment->vc); |
| 190 | } |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 191 | } |
| 192 | } |
bart | 8f822af | 2009-06-08 18:20:42 +0000 | [diff] [blame] | 193 | DRD_(thread_update_conflict_set)(tid, &old_vc); |
| 194 | DRD_(vc_cleanup)(&old_vc); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 195 | } |
| 196 | |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 197 | /** |
| 198 | * Compare the type of the rwlock specified at initialization time with |
| 199 | * the type passed as an argument, and complain if these two types do not |
| 200 | * match. |
| 201 | */ |
| 202 | static Bool drd_rwlock_check_type(struct rwlock_info* const p, |
| 203 | const RwLockT rwlock_type) |
| 204 | { |
| 205 | tl_assert(p); |
| 206 | /* The code below has to be updated if additional rwlock types are added. */ |
| 207 | tl_assert(rwlock_type == pthread_rwlock || rwlock_type == user_rwlock); |
| 208 | tl_assert(p->rwlock_type == pthread_rwlock || p->rwlock_type == user_rwlock); |
| 209 | |
| 210 | if (p->rwlock_type == rwlock_type) |
| 211 | return True; |
| 212 | |
| 213 | { |
| 214 | RwlockErrInfo REI = { DRD_(thread_get_running_tid)(), p->a1 }; |
| 215 | VG_(maybe_record_error) |
| 216 | (VG_(get_running_tid)(), |
| 217 | RwlockErr, |
| 218 | VG_(get_IP)(VG_(get_running_tid)()), |
| 219 | rwlock_type == pthread_rwlock |
| 220 | ? "Attempt to use a user-defined rwlock as a POSIX rwlock" |
| 221 | : "Attempt to use a POSIX rwlock as a user-defined rwlock", |
| 222 | &REI); |
| 223 | } |
| 224 | return False; |
| 225 | } |
| 226 | |
bart | 165b90f | 2008-05-10 12:54:27 +0000 | [diff] [blame] | 227 | /** Initialize the rwlock_info data structure *p. */ |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 228 | static |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 229 | void DRD_(rwlock_initialize)(struct rwlock_info* const p, const Addr rwlock, |
| 230 | const RwLockT rwlock_type) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 231 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 232 | tl_assert(rwlock != 0); |
| 233 | tl_assert(p->a1 == rwlock); |
| 234 | tl_assert(p->type == ClientRwlock); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 235 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 236 | p->cleanup = (void(*)(DrdClientobj*))rwlock_cleanup; |
| 237 | p->delete_thread |
| 238 | = (void(*)(DrdClientobj*, DrdThreadId))rwlock_delete_thread; |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 239 | p->rwlock_type = rwlock_type; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 240 | p->thread_info = VG_(OSetGen_Create)( |
| 241 | 0, 0, VG_(malloc), "drd.rwlock.ri.1", VG_(free)); |
| 242 | p->acquiry_time_ms = 0; |
| 243 | p->acquired_at = 0; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | /** Deallocate the memory that was allocated by rwlock_initialize(). */ |
bart | d2c5eae | 2009-02-21 15:27:04 +0000 | [diff] [blame] | 247 | static void rwlock_cleanup(struct rwlock_info* p) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 248 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 249 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 250 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 251 | tl_assert(p); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 252 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 253 | if (DRD_(s_trace_rwlock)) |
| 254 | { |
| 255 | VG_(message)(Vg_UserMsg, |
bart | 63c92ea | 2009-07-19 17:53:56 +0000 | [diff] [blame] | 256 | "[%d] rwlock_destroy 0x%lx\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 257 | DRD_(thread_get_running_tid)(), |
| 258 | p->a1); |
| 259 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 260 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 261 | if (DRD_(rwlock_is_locked)(p)) |
| 262 | { |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 263 | RwlockErrInfo REI = { DRD_(thread_get_running_tid)(), p->a1 }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 264 | VG_(maybe_record_error)(VG_(get_running_tid)(), |
| 265 | RwlockErr, |
| 266 | VG_(get_IP)(VG_(get_running_tid)()), |
| 267 | "Destroying locked rwlock", |
| 268 | &REI); |
| 269 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 270 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 271 | VG_(OSetGen_ResetIter)(p->thread_info); |
| 272 | for ( ; (q = VG_(OSetGen_Next)(p->thread_info)) != 0; ) |
| 273 | { |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 274 | DRD_(sg_put)(q->latest_wrlocked_segment); |
| 275 | DRD_(sg_put)(q->latest_rdlocked_segment); |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 276 | } |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 277 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 278 | VG_(OSetGen_Destroy)(p->thread_info); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | static |
| 282 | struct rwlock_info* |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 283 | DRD_(rwlock_get_or_allocate)(const Addr rwlock, const RwLockT rwlock_type) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 284 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 285 | struct rwlock_info* p; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 286 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 287 | tl_assert(offsetof(DrdClientobj, rwlock) == 0); |
| 288 | p = &(DRD_(clientobj_get)(rwlock, ClientRwlock)->rwlock); |
| 289 | if (p) |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 290 | { |
| 291 | drd_rwlock_check_type(p, rwlock_type); |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 292 | return p; |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 293 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 294 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 295 | if (DRD_(clientobj_present)(rwlock, rwlock + 1)) |
| 296 | { |
bart | 62cc232 | 2010-03-07 10:54:21 +0000 | [diff] [blame] | 297 | GenericErrInfo GEI = { |
| 298 | .tid = DRD_(thread_get_running_tid)(), |
| 299 | .addr = rwlock, |
| 300 | }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 301 | VG_(maybe_record_error)(VG_(get_running_tid)(), |
| 302 | GenericErr, |
| 303 | VG_(get_IP)(VG_(get_running_tid)()), |
| 304 | "Not a reader-writer lock", |
| 305 | &GEI); |
| 306 | return 0; |
| 307 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 308 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 309 | p = &(DRD_(clientobj_add)(rwlock, ClientRwlock)->rwlock); |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 310 | DRD_(rwlock_initialize)(p, rwlock, rwlock_type); |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 311 | return p; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 312 | } |
| 313 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 314 | static struct rwlock_info* DRD_(rwlock_get)(const Addr rwlock) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 315 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 316 | tl_assert(offsetof(DrdClientobj, rwlock) == 0); |
| 317 | return &(DRD_(clientobj_get)(rwlock, ClientRwlock)->rwlock); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 318 | } |
| 319 | |
| 320 | /** Called before pthread_rwlock_init(). */ |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 321 | struct rwlock_info* DRD_(rwlock_pre_init)(const Addr rwlock, |
| 322 | const RwLockT rwlock_type) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 323 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 324 | struct rwlock_info* p; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 325 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 326 | if (DRD_(s_trace_rwlock)) |
| 327 | { |
| 328 | VG_(message)(Vg_UserMsg, |
bart | 63c92ea | 2009-07-19 17:53:56 +0000 | [diff] [blame] | 329 | "[%d] rwlock_init 0x%lx\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 330 | DRD_(thread_get_running_tid)(), |
| 331 | rwlock); |
| 332 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 333 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 334 | p = DRD_(rwlock_get)(rwlock); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 335 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 336 | if (p) |
bart | 67707ec | 2009-07-27 17:02:52 +0000 | [diff] [blame] | 337 | drd_rwlock_check_type(p, rwlock_type); |
| 338 | |
| 339 | if (p) |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 340 | { |
| 341 | const ThreadId vg_tid = VG_(get_running_tid)(); |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 342 | RwlockErrInfo REI = { DRD_(thread_get_running_tid)(), p->a1 }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 343 | VG_(maybe_record_error)(vg_tid, |
| 344 | RwlockErr, |
| 345 | VG_(get_IP)(vg_tid), |
| 346 | "Reader-writer lock reinitialization", |
| 347 | &REI); |
| 348 | return p; |
| 349 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 350 | |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 351 | p = DRD_(rwlock_get_or_allocate)(rwlock, rwlock_type); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 352 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 353 | return p; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | /** Called after pthread_rwlock_destroy(). */ |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 357 | void DRD_(rwlock_post_destroy)(const Addr rwlock, const RwLockT rwlock_type) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 358 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 359 | struct rwlock_info* p; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 360 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 361 | p = DRD_(rwlock_get)(rwlock); |
| 362 | if (p == 0) |
| 363 | { |
bart | 62cc232 | 2010-03-07 10:54:21 +0000 | [diff] [blame] | 364 | GenericErrInfo GEI = { |
| 365 | .tid = DRD_(thread_get_running_tid)(), |
| 366 | .addr = rwlock, |
| 367 | }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 368 | VG_(maybe_record_error)(VG_(get_running_tid)(), |
| 369 | GenericErr, |
| 370 | VG_(get_IP)(VG_(get_running_tid)()), |
| 371 | "Not a reader-writer lock", |
| 372 | &GEI); |
| 373 | return; |
| 374 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 375 | |
bart | 67707ec | 2009-07-27 17:02:52 +0000 | [diff] [blame] | 376 | drd_rwlock_check_type(p, rwlock_type); |
| 377 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 378 | DRD_(clientobj_remove)(rwlock, ClientRwlock); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 379 | } |
| 380 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 381 | /** |
| 382 | * Called before pthread_rwlock_rdlock() is invoked. If a data structure for |
| 383 | * the client-side object was not yet created, do this now. Also check whether |
| 384 | * an attempt is made to lock recursively a synchronization object that must |
| 385 | * not be locked recursively. |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 386 | */ |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 387 | void DRD_(rwlock_pre_rdlock)(const Addr rwlock, const RwLockT rwlock_type) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 388 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 389 | struct rwlock_info* p; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 390 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 391 | if (DRD_(s_trace_rwlock)) |
| 392 | { |
| 393 | VG_(message)(Vg_UserMsg, |
bart | 63c92ea | 2009-07-19 17:53:56 +0000 | [diff] [blame] | 394 | "[%d] pre_rwlock_rdlock 0x%lx\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 395 | DRD_(thread_get_running_tid)(), |
| 396 | rwlock); |
| 397 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 398 | |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 399 | p = DRD_(rwlock_get_or_allocate)(rwlock, rwlock_type); |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 400 | tl_assert(p); |
bart | 165b90f | 2008-05-10 12:54:27 +0000 | [diff] [blame] | 401 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 402 | if (DRD_(rwlock_is_wrlocked_by)(p, DRD_(thread_get_running_tid)())) |
| 403 | { |
| 404 | VG_(message)(Vg_UserMsg, |
| 405 | "reader-writer lock 0x%lx is already locked for" |
sewardj | 1e29ebc | 2009-07-15 14:49:17 +0000 | [diff] [blame] | 406 | " writing by calling thread\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 407 | p->a1); |
| 408 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 409 | } |
| 410 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 411 | /** |
| 412 | * Update rwlock_info state when locking the pthread_rwlock_t mutex. |
| 413 | * Note: this function must be called after pthread_rwlock_rdlock() has been |
| 414 | * called, or a race condition is triggered ! |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 415 | */ |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 416 | void DRD_(rwlock_post_rdlock)(const Addr rwlock, const RwLockT rwlock_type, |
| 417 | const Bool took_lock) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 418 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 419 | const DrdThreadId drd_tid = DRD_(thread_get_running_tid)(); |
| 420 | struct rwlock_info* p; |
| 421 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 422 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 423 | if (DRD_(s_trace_rwlock)) |
| 424 | { |
| 425 | VG_(message)(Vg_UserMsg, |
bart | 63c92ea | 2009-07-19 17:53:56 +0000 | [diff] [blame] | 426 | "[%d] post_rwlock_rdlock 0x%lx\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 427 | drd_tid, |
| 428 | rwlock); |
| 429 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 430 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 431 | p = DRD_(rwlock_get)(rwlock); |
bart | 165b90f | 2008-05-10 12:54:27 +0000 | [diff] [blame] | 432 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 433 | if (! p || ! took_lock) |
| 434 | return; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 435 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 436 | tl_assert(! DRD_(rwlock_is_wrlocked)(p)); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 437 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 438 | q = DRD_(lookup_or_insert_node)(p->thread_info, drd_tid); |
| 439 | if (++q->reader_nesting_count == 1) |
| 440 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 441 | DRD_(thread_new_segment)(drd_tid); |
| 442 | DRD_(s_rwlock_segment_creation_count)++; |
bart | 7627be3 | 2009-06-06 12:26:05 +0000 | [diff] [blame] | 443 | DRD_(rwlock_combine_other_vc)(p, drd_tid, False); |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 444 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 445 | p->acquiry_time_ms = VG_(read_millisecond_timer)(); |
| 446 | p->acquired_at = VG_(record_ExeContext)(VG_(get_running_tid)(), 0); |
| 447 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 448 | } |
| 449 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 450 | /** |
| 451 | * Called before pthread_rwlock_wrlock() is invoked. If a data structure for |
| 452 | * the client-side object was not yet created, do this now. Also check whether |
| 453 | * an attempt is made to lock recursively a synchronization object that must |
| 454 | * not be locked recursively. |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 455 | */ |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 456 | void DRD_(rwlock_pre_wrlock)(const Addr rwlock, const RwLockT rwlock_type) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 457 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 458 | struct rwlock_info* p; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 459 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 460 | p = DRD_(rwlock_get)(rwlock); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 461 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 462 | if (DRD_(s_trace_rwlock)) |
| 463 | { |
| 464 | VG_(message)(Vg_UserMsg, |
bart | 63c92ea | 2009-07-19 17:53:56 +0000 | [diff] [blame] | 465 | "[%d] pre_rwlock_wrlock 0x%lx\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 466 | DRD_(thread_get_running_tid)(), |
| 467 | rwlock); |
| 468 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 469 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 470 | if (p == 0) |
bart | c844150 | 2009-07-27 16:03:51 +0000 | [diff] [blame] | 471 | p = DRD_(rwlock_get_or_allocate)(rwlock, rwlock_type); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 472 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 473 | tl_assert(p); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 474 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 475 | if (DRD_(rwlock_is_wrlocked_by)(p, DRD_(thread_get_running_tid)())) |
| 476 | { |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 477 | RwlockErrInfo REI = { DRD_(thread_get_running_tid)(), p->a1 }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 478 | VG_(maybe_record_error)(VG_(get_running_tid)(), |
| 479 | RwlockErr, |
| 480 | VG_(get_IP)(VG_(get_running_tid)()), |
| 481 | "Recursive writer locking not allowed", |
| 482 | &REI); |
| 483 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | /** |
| 487 | * Update rwlock_info state when locking the pthread_rwlock_t rwlock. |
bart | 165b90f | 2008-05-10 12:54:27 +0000 | [diff] [blame] | 488 | * Note: this function must be called after pthread_rwlock_wrlock() has |
| 489 | * finished, or a race condition is triggered ! |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 490 | */ |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 491 | void DRD_(rwlock_post_wrlock)(const Addr rwlock, const RwLockT rwlock_type, |
| 492 | const Bool took_lock) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 493 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 494 | const DrdThreadId drd_tid = DRD_(thread_get_running_tid)(); |
| 495 | struct rwlock_info* p; |
| 496 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 497 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 498 | p = DRD_(rwlock_get)(rwlock); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 499 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 500 | if (DRD_(s_trace_rwlock)) |
| 501 | { |
| 502 | VG_(message)(Vg_UserMsg, |
bart | 63c92ea | 2009-07-19 17:53:56 +0000 | [diff] [blame] | 503 | "[%d] post_rwlock_wrlock 0x%lx\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 504 | drd_tid, |
| 505 | rwlock); |
| 506 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 507 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 508 | if (! p || ! took_lock) |
| 509 | return; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 510 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 511 | q = DRD_(lookup_or_insert_node)(p->thread_info, |
| 512 | DRD_(thread_get_running_tid)()); |
| 513 | tl_assert(q->writer_nesting_count == 0); |
| 514 | q->writer_nesting_count++; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 515 | tl_assert(q->writer_nesting_count == 1); |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 516 | DRD_(thread_new_segment)(drd_tid); |
| 517 | DRD_(s_rwlock_segment_creation_count)++; |
bart | 7627be3 | 2009-06-06 12:26:05 +0000 | [diff] [blame] | 518 | DRD_(rwlock_combine_other_vc)(p, drd_tid, True); |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 519 | p->acquiry_time_ms = VG_(read_millisecond_timer)(); |
| 520 | p->acquired_at = VG_(record_ExeContext)(VG_(get_running_tid)(), 0); |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | /** |
| 524 | * Update rwlock_info state when unlocking the pthread_rwlock_t rwlock. |
bart | 7e6de96 | 2009-02-21 09:39:09 +0000 | [diff] [blame] | 525 | * |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 526 | * @param rwlock Pointer to pthread_rwlock_t data structure in the client space. |
bart | 7e6de96 | 2009-02-21 09:39:09 +0000 | [diff] [blame] | 527 | * |
| 528 | * @return New value of the rwlock recursion count. |
| 529 | * |
| 530 | * @note This function must be called before pthread_rwlock_unlock() is called, |
| 531 | * or a race condition is triggered ! |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 532 | */ |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 533 | void DRD_(rwlock_pre_unlock)(const Addr rwlock, const RwLockT rwlock_type) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 534 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 535 | const DrdThreadId drd_tid = DRD_(thread_get_running_tid)(); |
| 536 | const ThreadId vg_tid = VG_(get_running_tid)(); |
| 537 | struct rwlock_info* p; |
| 538 | struct rwlock_thread_info* q; |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 539 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 540 | if (DRD_(s_trace_rwlock)) |
| 541 | { |
| 542 | VG_(message)(Vg_UserMsg, |
bart | 63c92ea | 2009-07-19 17:53:56 +0000 | [diff] [blame] | 543 | "[%d] rwlock_unlock 0x%lx\n", |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 544 | drd_tid, |
| 545 | rwlock); |
| 546 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 547 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 548 | p = DRD_(rwlock_get)(rwlock); |
| 549 | if (p == 0) |
| 550 | { |
bart | 62cc232 | 2010-03-07 10:54:21 +0000 | [diff] [blame] | 551 | GenericErrInfo GEI = { |
| 552 | .tid = DRD_(thread_get_running_tid)(), |
| 553 | .addr = rwlock, |
| 554 | }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 555 | VG_(maybe_record_error)(VG_(get_running_tid)(), |
| 556 | GenericErr, |
| 557 | VG_(get_IP)(VG_(get_running_tid)()), |
| 558 | "Not a reader-writer lock", |
| 559 | &GEI); |
| 560 | return; |
| 561 | } |
bart | 67707ec | 2009-07-27 17:02:52 +0000 | [diff] [blame] | 562 | |
| 563 | drd_rwlock_check_type(p, rwlock_type); |
| 564 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 565 | if (! DRD_(rwlock_is_locked_by)(p, drd_tid)) |
| 566 | { |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 567 | RwlockErrInfo REI = { DRD_(thread_get_running_tid)(), p->a1 }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 568 | VG_(maybe_record_error)(vg_tid, |
| 569 | RwlockErr, |
| 570 | VG_(get_IP)(vg_tid), |
| 571 | "Reader-writer lock not locked by calling thread", |
| 572 | &REI); |
| 573 | return; |
| 574 | } |
| 575 | q = DRD_(lookup_or_insert_node)(p->thread_info, drd_tid); |
| 576 | tl_assert(q); |
| 577 | if (q->reader_nesting_count > 0) |
| 578 | { |
| 579 | q->reader_nesting_count--; |
| 580 | if (q->reader_nesting_count == 0 && DRD_(s_shared_threshold_ms) > 0) |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 581 | { |
bart | 430c45f | 2009-04-13 08:05:18 +0000 | [diff] [blame] | 582 | Long held = VG_(read_millisecond_timer)() - p->acquiry_time_ms; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 583 | if (held > DRD_(s_shared_threshold_ms)) |
| 584 | { |
| 585 | HoldtimeErrInfo HEI |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 586 | = { DRD_(thread_get_running_tid)(), |
| 587 | rwlock, p->acquired_at, held, DRD_(s_shared_threshold_ms) }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 588 | VG_(maybe_record_error)(vg_tid, |
| 589 | HoldtimeErr, |
| 590 | VG_(get_IP)(vg_tid), |
| 591 | "rwlock", |
| 592 | &HEI); |
| 593 | } |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 594 | } |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 595 | if (q->reader_nesting_count == 0 && q->writer_nesting_count == 0) |
| 596 | { |
| 597 | /* |
| 598 | * This pthread_rwlock_unlock() call really unlocks the rwlock. Save |
| 599 | * the current vector clock of the thread such that it is available |
| 600 | * when this rwlock is locked again. |
| 601 | */ |
| 602 | DRD_(thread_get_latest_segment)(&q->latest_rdlocked_segment, drd_tid); |
| 603 | DRD_(thread_new_segment)(drd_tid); |
| 604 | DRD_(s_rwlock_segment_creation_count)++; |
| 605 | } |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 606 | } |
| 607 | else if (q->writer_nesting_count > 0) |
| 608 | { |
| 609 | q->writer_nesting_count--; |
| 610 | if (q->writer_nesting_count == 0 && DRD_(s_exclusive_threshold_ms) > 0) |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 611 | { |
bart | 430c45f | 2009-04-13 08:05:18 +0000 | [diff] [blame] | 612 | Long held = VG_(read_millisecond_timer)() - p->acquiry_time_ms; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 613 | if (held > DRD_(s_exclusive_threshold_ms)) |
| 614 | { |
| 615 | HoldtimeErrInfo HEI |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 616 | = { DRD_(thread_get_running_tid)(), |
| 617 | rwlock, p->acquired_at, held, |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 618 | DRD_(s_exclusive_threshold_ms) }; |
| 619 | VG_(maybe_record_error)(vg_tid, |
| 620 | HoldtimeErr, |
| 621 | VG_(get_IP)(vg_tid), |
| 622 | "rwlock", |
| 623 | &HEI); |
| 624 | } |
bart | 9d5b796 | 2008-05-14 12:25:00 +0000 | [diff] [blame] | 625 | } |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 626 | if (q->reader_nesting_count == 0 && q->writer_nesting_count == 0) |
| 627 | { |
| 628 | /* |
| 629 | * This pthread_rwlock_unlock() call really unlocks the rwlock. Save |
| 630 | * the current vector clock of the thread such that it is available |
| 631 | * when this rwlock is locked again. |
| 632 | */ |
| 633 | DRD_(thread_get_latest_segment)(&q->latest_wrlocked_segment, drd_tid); |
| 634 | DRD_(thread_new_segment)(drd_tid); |
| 635 | DRD_(s_rwlock_segment_creation_count)++; |
| 636 | } |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 637 | } |
| 638 | else |
| 639 | { |
| 640 | tl_assert(False); |
| 641 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 642 | } |
| 643 | |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 644 | /** Called when thread tid stops to exist. */ |
bart | d2c5eae | 2009-02-21 15:27:04 +0000 | [diff] [blame] | 645 | static void rwlock_delete_thread(struct rwlock_info* const p, |
| 646 | const DrdThreadId tid) |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 647 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 648 | struct rwlock_thread_info* q; |
bart | b3f3340 | 2009-07-25 11:15:03 +0000 | [diff] [blame] | 649 | |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 650 | if (DRD_(rwlock_is_locked_by)(p, tid)) |
| 651 | { |
bart | d45d995 | 2009-05-31 18:53:54 +0000 | [diff] [blame] | 652 | RwlockErrInfo REI = { DRD_(thread_get_running_tid)(), p->a1 }; |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 653 | VG_(maybe_record_error)(VG_(get_running_tid)(), |
| 654 | RwlockErr, |
| 655 | VG_(get_IP)(VG_(get_running_tid)()), |
| 656 | "Reader-writer lock still locked at thread exit", |
| 657 | &REI); |
| 658 | q = DRD_(lookup_or_insert_node)(p->thread_info, tid); |
| 659 | q->reader_nesting_count = 0; |
| 660 | q->writer_nesting_count = 0; |
| 661 | } |
bart | 777f7fe | 2008-03-02 17:43:18 +0000 | [diff] [blame] | 662 | } |
bart | 6bbefaf | 2008-04-19 15:16:45 +0000 | [diff] [blame] | 663 | |
bart | dc1ef03 | 2009-02-15 14:18:02 +0000 | [diff] [blame] | 664 | ULong DRD_(get_rwlock_segment_creation_count)(void) |
bart | 6bbefaf | 2008-04-19 15:16:45 +0000 | [diff] [blame] | 665 | { |
bart | bedfd23 | 2009-03-26 19:07:15 +0000 | [diff] [blame] | 666 | return DRD_(s_rwlock_segment_creation_count); |
bart | 6bbefaf | 2008-04-19 15:16:45 +0000 | [diff] [blame] | 667 | } |