sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Helgrind: a Valgrind tool for detecting errors ---*/ |
| 4 | /*--- in threaded programs. hg_main.c ---*/ |
| 5 | /*--------------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
| 8 | This file is part of Helgrind, a Valgrind tool for detecting errors |
| 9 | in threaded programs. |
| 10 | |
sewardj | 9eecbbb | 2010-05-03 21:37:12 +0000 | [diff] [blame] | 11 | Copyright (C) 2007-2010 OpenWorks LLP |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 12 | info@open-works.co.uk |
| 13 | |
sewardj | 9eecbbb | 2010-05-03 21:37:12 +0000 | [diff] [blame] | 14 | Copyright (C) 2007-2010 Apple, Inc. |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 15 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 16 | This program is free software; you can redistribute it and/or |
| 17 | modify it under the terms of the GNU General Public License as |
| 18 | published by the Free Software Foundation; either version 2 of the |
| 19 | License, or (at your option) any later version. |
| 20 | |
| 21 | This program is distributed in the hope that it will be useful, but |
| 22 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | General Public License for more details. |
| 25 | |
| 26 | You should have received a copy of the GNU General Public License |
| 27 | along with this program; if not, write to the Free Software |
| 28 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 29 | 02111-1307, USA. |
| 30 | |
| 31 | The GNU General Public License is contained in the file COPYING. |
| 32 | |
| 33 | Neither the names of the U.S. Department of Energy nor the |
| 34 | University of California nor the names of its contributors may be |
| 35 | used to endorse or promote products derived from this software |
| 36 | without prior written permission. |
| 37 | */ |
| 38 | |
| 39 | #include "pub_tool_basics.h" |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 40 | #include "pub_tool_libcassert.h" |
| 41 | #include "pub_tool_libcbase.h" |
| 42 | #include "pub_tool_libcprint.h" |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 43 | #include "pub_tool_threadstate.h" |
| 44 | #include "pub_tool_tooliface.h" |
| 45 | #include "pub_tool_hashtable.h" |
| 46 | #include "pub_tool_replacemalloc.h" |
| 47 | #include "pub_tool_machine.h" |
| 48 | #include "pub_tool_options.h" |
| 49 | #include "pub_tool_xarray.h" |
| 50 | #include "pub_tool_stacktrace.h" |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 51 | #include "pub_tool_wordfm.h" |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 52 | #include "pub_tool_debuginfo.h" // VG_(find_seginfo), VG_(seginfo_soname) |
| 53 | #include "pub_tool_redir.h" // sonames for the dynamic linkers |
| 54 | #include "pub_tool_vki.h" // VKI_PAGE_SIZE |
sewardj | 61bc2c5 | 2011-02-09 10:34:00 +0000 | [diff] [blame] | 55 | #include "pub_tool_libcproc.h" // VG_(atfork) |
sewardj | 234e558 | 2011-02-09 12:47:23 +0000 | [diff] [blame^] | 56 | #include "pub_tool_aspacemgr.h" // VG_(am_is_valid_for_client) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 57 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 58 | #include "hg_basics.h" |
| 59 | #include "hg_wordset.h" |
| 60 | #include "hg_lock_n_thread.h" |
| 61 | #include "hg_errors.h" |
| 62 | |
| 63 | #include "libhb.h" |
| 64 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 65 | #include "helgrind.h" |
| 66 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 67 | |
| 68 | // FIXME: new_mem_w_tid ignores the supplied tid. (wtf?!) |
| 69 | |
| 70 | // FIXME: when client destroys a lock or a CV, remove these |
| 71 | // from our mappings, so that the associated SO can be freed up |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 72 | |
| 73 | /*----------------------------------------------------------------*/ |
| 74 | /*--- ---*/ |
| 75 | /*----------------------------------------------------------------*/ |
| 76 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 77 | /* Note this needs to be compiled with -fno-strict-aliasing, since it |
| 78 | contains a whole bunch of calls to lookupFM etc which cast between |
| 79 | Word and pointer types. gcc rightly complains this breaks ANSI C |
| 80 | strict aliasing rules, at -O2. No complaints at -O, but -O2 gives |
| 81 | worthwhile performance benefits over -O. |
sewardj | c17be79 | 2007-11-10 22:50:13 +0000 | [diff] [blame] | 82 | */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 83 | |
sewardj | efd3b4d | 2007-12-02 02:05:23 +0000 | [diff] [blame] | 84 | // FIXME catch sync signals (SEGV, basically) and unlock BHL, |
| 85 | // if held. Otherwise a LOCK-prefixed insn which segfaults |
| 86 | // gets Helgrind into a total muddle as the BHL will not be |
| 87 | // released after the insn. |
| 88 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 89 | // FIXME what is supposed to happen to locks in memory which |
| 90 | // is relocated as a result of client realloc? |
| 91 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 92 | // FIXME put referencing ThreadId into Thread and get |
| 93 | // rid of the slow reverse mapping function. |
| 94 | |
| 95 | // FIXME accesses to NoAccess areas: change state to Excl? |
| 96 | |
| 97 | // FIXME report errors for accesses of NoAccess memory? |
| 98 | |
| 99 | // FIXME pth_cond_wait/timedwait wrappers. Even if these fail, |
| 100 | // the thread still holds the lock. |
| 101 | |
| 102 | /* ------------ Debug/trace options ------------ */ |
| 103 | |
| 104 | // this is: |
| 105 | // shadow_mem_make_NoAccess: 29156 SMs, 1728 scanned |
| 106 | // happens_before_wrk: 1000 |
| 107 | // ev__post_thread_join: 3360 SMs, 29 scanned, 252 re-Excls |
| 108 | #define SHOW_EXPENSIVE_STUFF 0 |
| 109 | |
| 110 | // 0 for silent, 1 for some stuff, 2 for lots of stuff |
| 111 | #define SHOW_EVENTS 0 |
| 112 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 113 | |
| 114 | static void all__sanity_check ( Char* who ); /* fwds */ |
| 115 | |
| 116 | #define HG_CLI__MALLOC_REDZONE_SZB 16 /* let's say */ |
| 117 | |
| 118 | // 0 for none, 1 for dump at end of run |
| 119 | #define SHOW_DATA_STRUCTURES 0 |
| 120 | |
| 121 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 122 | /* ------------ Misc comments ------------ */ |
| 123 | |
| 124 | // FIXME: don't hardwire initial entries for root thread. |
| 125 | // Instead, let the pre_thread_ll_create handler do this. |
| 126 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 127 | |
| 128 | /*----------------------------------------------------------------*/ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 129 | /*--- Primary data structures ---*/ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 130 | /*----------------------------------------------------------------*/ |
| 131 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 132 | /* Admin linked list of Threads */ |
| 133 | static Thread* admin_threads = NULL; |
| 134 | |
| 135 | /* Admin linked list of Locks */ |
| 136 | static Lock* admin_locks = NULL; |
| 137 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 138 | /* Mapping table for core ThreadIds to Thread* */ |
| 139 | static Thread** map_threads = NULL; /* Array[VG_N_THREADS] of Thread* */ |
| 140 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 141 | /* Mapping table for lock guest addresses to Lock* */ |
| 142 | static WordFM* map_locks = NULL; /* WordFM LockAddr Lock* */ |
| 143 | |
| 144 | /* The word-set universes for thread sets and lock sets. */ |
| 145 | static WordSetU* univ_tsets = NULL; /* sets of Thread* */ |
| 146 | static WordSetU* univ_lsets = NULL; /* sets of Lock* */ |
| 147 | static WordSetU* univ_laog = NULL; /* sets of Lock*, for LAOG */ |
| 148 | |
| 149 | /* never changed; we only care about its address. Is treated as if it |
| 150 | was a standard userspace lock. Also we have a Lock* describing it |
| 151 | so it can participate in lock sets in the usual way. */ |
| 152 | static Int __bus_lock = 0; |
| 153 | static Lock* __bus_lock_Lock = NULL; |
| 154 | |
| 155 | |
| 156 | /*----------------------------------------------------------------*/ |
| 157 | /*--- Simple helpers for the data structures ---*/ |
| 158 | /*----------------------------------------------------------------*/ |
| 159 | |
| 160 | static UWord stats__lockN_acquires = 0; |
| 161 | static UWord stats__lockN_releases = 0; |
| 162 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 163 | static |
| 164 | ThreadId map_threads_maybe_reverse_lookup_SLOW ( Thread* thr ); /*fwds*/ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 165 | |
| 166 | /* --------- Constructors --------- */ |
| 167 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 168 | static Thread* mk_Thread ( Thr* hbthr ) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 169 | static Int indx = 1; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 170 | Thread* thread = HG_(zalloc)( "hg.mk_Thread.1", sizeof(Thread) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 171 | thread->locksetA = HG_(emptyWS)( univ_lsets ); |
| 172 | thread->locksetW = HG_(emptyWS)( univ_lsets ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 173 | thread->magic = Thread_MAGIC; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 174 | thread->hbthr = hbthr; |
| 175 | thread->coretid = VG_INVALID_THREADID; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 176 | thread->created_at = NULL; |
| 177 | thread->announced = False; |
| 178 | thread->errmsg_index = indx++; |
| 179 | thread->admin = admin_threads; |
| 180 | admin_threads = thread; |
| 181 | return thread; |
| 182 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 183 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 184 | // Make a new lock which is unlocked (hence ownerless) |
| 185 | static Lock* mk_LockN ( LockKind kind, Addr guestaddr ) { |
| 186 | static ULong unique = 0; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 187 | Lock* lock = HG_(zalloc)( "hg.mk_Lock.1", sizeof(Lock) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 188 | lock->admin = admin_locks; |
| 189 | lock->unique = unique++; |
| 190 | lock->magic = LockN_MAGIC; |
| 191 | lock->appeared_at = NULL; |
| 192 | lock->acquired_at = NULL; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 193 | lock->hbso = libhb_so_alloc(); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 194 | lock->guestaddr = guestaddr; |
| 195 | lock->kind = kind; |
| 196 | lock->heldW = False; |
| 197 | lock->heldBy = NULL; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 198 | tl_assert(HG_(is_sane_LockN)(lock)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 199 | admin_locks = lock; |
| 200 | return lock; |
| 201 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 202 | |
| 203 | /* Release storage for a Lock. Also release storage in .heldBy, if |
| 204 | any. */ |
| 205 | static void del_LockN ( Lock* lk ) |
| 206 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 207 | tl_assert(HG_(is_sane_LockN)(lk)); |
| 208 | tl_assert(lk->hbso); |
| 209 | libhb_so_dealloc(lk->hbso); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 210 | if (lk->heldBy) |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 211 | VG_(deleteBag)( lk->heldBy ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 212 | VG_(memset)(lk, 0xAA, sizeof(*lk)); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 213 | HG_(free)(lk); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | /* Update 'lk' to reflect that 'thr' now has a write-acquisition of |
| 217 | it. This is done strictly: only combinations resulting from |
| 218 | correct program and libpthread behaviour are allowed. */ |
| 219 | static void lockN_acquire_writer ( Lock* lk, Thread* thr ) |
| 220 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 221 | tl_assert(HG_(is_sane_LockN)(lk)); |
| 222 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 223 | |
| 224 | stats__lockN_acquires++; |
| 225 | |
| 226 | /* EXPOSITION only */ |
| 227 | /* We need to keep recording snapshots of where the lock was |
| 228 | acquired, so as to produce better lock-order error messages. */ |
| 229 | if (lk->acquired_at == NULL) { |
| 230 | ThreadId tid; |
| 231 | tl_assert(lk->heldBy == NULL); |
| 232 | tid = map_threads_maybe_reverse_lookup_SLOW(thr); |
| 233 | lk->acquired_at |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 234 | = VG_(record_ExeContext)(tid, 0/*first_ip_delta*/); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 235 | } else { |
| 236 | tl_assert(lk->heldBy != NULL); |
| 237 | } |
| 238 | /* end EXPOSITION only */ |
| 239 | |
| 240 | switch (lk->kind) { |
| 241 | case LK_nonRec: |
| 242 | case_LK_nonRec: |
| 243 | tl_assert(lk->heldBy == NULL); /* can't w-lock recursively */ |
| 244 | tl_assert(!lk->heldW); |
| 245 | lk->heldW = True; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 246 | lk->heldBy = VG_(newBag)( HG_(zalloc), "hg.lNaw.1", HG_(free) ); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 247 | VG_(addToBag)( lk->heldBy, (Word)thr ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 248 | break; |
| 249 | case LK_mbRec: |
| 250 | if (lk->heldBy == NULL) |
| 251 | goto case_LK_nonRec; |
| 252 | /* 2nd and subsequent locking of a lock by its owner */ |
| 253 | tl_assert(lk->heldW); |
| 254 | /* assert: lk is only held by one thread .. */ |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 255 | tl_assert(VG_(sizeUniqueBag(lk->heldBy)) == 1); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 256 | /* assert: .. and that thread is 'thr'. */ |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 257 | tl_assert(VG_(elemBag)(lk->heldBy, (Word)thr) |
| 258 | == VG_(sizeTotalBag)(lk->heldBy)); |
| 259 | VG_(addToBag)(lk->heldBy, (Word)thr); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 260 | break; |
| 261 | case LK_rdwr: |
| 262 | tl_assert(lk->heldBy == NULL && !lk->heldW); /* must be unheld */ |
| 263 | goto case_LK_nonRec; |
| 264 | default: |
| 265 | tl_assert(0); |
| 266 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 267 | tl_assert(HG_(is_sane_LockN)(lk)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | static void lockN_acquire_reader ( Lock* lk, Thread* thr ) |
| 271 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 272 | tl_assert(HG_(is_sane_LockN)(lk)); |
| 273 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 274 | /* can only add reader to a reader-writer lock. */ |
| 275 | tl_assert(lk->kind == LK_rdwr); |
| 276 | /* lk must be free or already r-held. */ |
| 277 | tl_assert(lk->heldBy == NULL |
| 278 | || (lk->heldBy != NULL && !lk->heldW)); |
| 279 | |
| 280 | stats__lockN_acquires++; |
| 281 | |
| 282 | /* EXPOSITION only */ |
| 283 | /* We need to keep recording snapshots of where the lock was |
| 284 | acquired, so as to produce better lock-order error messages. */ |
| 285 | if (lk->acquired_at == NULL) { |
| 286 | ThreadId tid; |
| 287 | tl_assert(lk->heldBy == NULL); |
| 288 | tid = map_threads_maybe_reverse_lookup_SLOW(thr); |
| 289 | lk->acquired_at |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 290 | = VG_(record_ExeContext)(tid, 0/*first_ip_delta*/); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 291 | } else { |
| 292 | tl_assert(lk->heldBy != NULL); |
| 293 | } |
| 294 | /* end EXPOSITION only */ |
| 295 | |
| 296 | if (lk->heldBy) { |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 297 | VG_(addToBag)(lk->heldBy, (Word)thr); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 298 | } else { |
| 299 | lk->heldW = False; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 300 | lk->heldBy = VG_(newBag)( HG_(zalloc), "hg.lNar.1", HG_(free) ); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 301 | VG_(addToBag)( lk->heldBy, (Word)thr ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 302 | } |
| 303 | tl_assert(!lk->heldW); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 304 | tl_assert(HG_(is_sane_LockN)(lk)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | /* Update 'lk' to reflect a release of it by 'thr'. This is done |
| 308 | strictly: only combinations resulting from correct program and |
| 309 | libpthread behaviour are allowed. */ |
| 310 | |
| 311 | static void lockN_release ( Lock* lk, Thread* thr ) |
| 312 | { |
| 313 | Bool b; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 314 | tl_assert(HG_(is_sane_LockN)(lk)); |
| 315 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 316 | /* lock must be held by someone */ |
| 317 | tl_assert(lk->heldBy); |
| 318 | stats__lockN_releases++; |
| 319 | /* Remove it from the holder set */ |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 320 | b = VG_(delFromBag)(lk->heldBy, (Word)thr); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 321 | /* thr must actually have been a holder of lk */ |
| 322 | tl_assert(b); |
| 323 | /* normalise */ |
| 324 | tl_assert(lk->acquired_at); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 325 | if (VG_(isEmptyBag)(lk->heldBy)) { |
| 326 | VG_(deleteBag)(lk->heldBy); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 327 | lk->heldBy = NULL; |
| 328 | lk->heldW = False; |
| 329 | lk->acquired_at = NULL; |
| 330 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 331 | tl_assert(HG_(is_sane_LockN)(lk)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | static void remove_Lock_from_locksets_of_all_owning_Threads( Lock* lk ) |
| 335 | { |
| 336 | Thread* thr; |
| 337 | if (!lk->heldBy) { |
| 338 | tl_assert(!lk->heldW); |
| 339 | return; |
| 340 | } |
| 341 | /* for each thread that holds this lock do ... */ |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 342 | VG_(initIterBag)( lk->heldBy ); |
| 343 | while (VG_(nextIterBag)( lk->heldBy, (Word*)&thr, NULL )) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 344 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 345 | tl_assert(HG_(elemWS)( univ_lsets, |
| 346 | thr->locksetA, (Word)lk )); |
| 347 | thr->locksetA |
| 348 | = HG_(delFromWS)( univ_lsets, thr->locksetA, (Word)lk ); |
| 349 | |
| 350 | if (lk->heldW) { |
| 351 | tl_assert(HG_(elemWS)( univ_lsets, |
| 352 | thr->locksetW, (Word)lk )); |
| 353 | thr->locksetW |
| 354 | = HG_(delFromWS)( univ_lsets, thr->locksetW, (Word)lk ); |
| 355 | } |
| 356 | } |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 357 | VG_(doneIterBag)( lk->heldBy ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 358 | } |
| 359 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 360 | |
| 361 | /*----------------------------------------------------------------*/ |
| 362 | /*--- Print out the primary data structures ---*/ |
| 363 | /*----------------------------------------------------------------*/ |
| 364 | |
sewardj | d52392d | 2008-11-08 20:36:26 +0000 | [diff] [blame] | 365 | //static WordSetID del_BHL ( WordSetID lockset ); /* fwds */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 366 | |
| 367 | #define PP_THREADS (1<<1) |
| 368 | #define PP_LOCKS (1<<2) |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 369 | #define PP_ALL (PP_THREADS | PP_LOCKS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 370 | |
| 371 | |
| 372 | static const Int sHOW_ADMIN = 0; |
| 373 | |
| 374 | static void space ( Int n ) |
| 375 | { |
| 376 | Int i; |
| 377 | Char spaces[128+1]; |
| 378 | tl_assert(n >= 0 && n < 128); |
| 379 | if (n == 0) |
| 380 | return; |
| 381 | for (i = 0; i < n; i++) |
| 382 | spaces[i] = ' '; |
| 383 | spaces[i] = 0; |
| 384 | tl_assert(i < 128+1); |
| 385 | VG_(printf)("%s", spaces); |
| 386 | } |
| 387 | |
| 388 | static void pp_Thread ( Int d, Thread* t ) |
| 389 | { |
| 390 | space(d+0); VG_(printf)("Thread %p {\n", t); |
| 391 | if (sHOW_ADMIN) { |
| 392 | space(d+3); VG_(printf)("admin %p\n", t->admin); |
| 393 | space(d+3); VG_(printf)("magic 0x%x\n", (UInt)t->magic); |
| 394 | } |
| 395 | space(d+3); VG_(printf)("locksetA %d\n", (Int)t->locksetA); |
| 396 | space(d+3); VG_(printf)("locksetW %d\n", (Int)t->locksetW); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 397 | space(d+0); VG_(printf)("}\n"); |
| 398 | } |
| 399 | |
| 400 | static void pp_admin_threads ( Int d ) |
| 401 | { |
| 402 | Int i, n; |
| 403 | Thread* t; |
| 404 | for (n = 0, t = admin_threads; t; n++, t = t->admin) { |
| 405 | /* nothing */ |
| 406 | } |
| 407 | space(d); VG_(printf)("admin_threads (%d records) {\n", n); |
| 408 | for (i = 0, t = admin_threads; t; i++, t = t->admin) { |
| 409 | if (0) { |
| 410 | space(n); |
| 411 | VG_(printf)("admin_threads record %d of %d:\n", i, n); |
| 412 | } |
| 413 | pp_Thread(d+3, t); |
| 414 | } |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 415 | space(d); VG_(printf)("}\n"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | static void pp_map_threads ( Int d ) |
| 419 | { |
njn | 4c245e5 | 2009-03-15 23:25:38 +0000 | [diff] [blame] | 420 | Int i, n = 0; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 421 | space(d); VG_(printf)("map_threads "); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 422 | for (i = 0; i < VG_N_THREADS; i++) { |
| 423 | if (map_threads[i] != NULL) |
| 424 | n++; |
| 425 | } |
| 426 | VG_(printf)("(%d entries) {\n", n); |
| 427 | for (i = 0; i < VG_N_THREADS; i++) { |
| 428 | if (map_threads[i] == NULL) |
| 429 | continue; |
| 430 | space(d+3); |
| 431 | VG_(printf)("coretid %d -> Thread %p\n", i, map_threads[i]); |
| 432 | } |
| 433 | space(d); VG_(printf)("}\n"); |
| 434 | } |
| 435 | |
| 436 | static const HChar* show_LockKind ( LockKind lkk ) { |
| 437 | switch (lkk) { |
| 438 | case LK_mbRec: return "mbRec"; |
| 439 | case LK_nonRec: return "nonRec"; |
| 440 | case LK_rdwr: return "rdwr"; |
| 441 | default: tl_assert(0); |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | static void pp_Lock ( Int d, Lock* lk ) |
| 446 | { |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 447 | space(d+0); VG_(printf)("Lock %p (ga %#lx) {\n", lk, lk->guestaddr); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 448 | if (sHOW_ADMIN) { |
| 449 | space(d+3); VG_(printf)("admin %p\n", lk->admin); |
| 450 | space(d+3); VG_(printf)("magic 0x%x\n", (UInt)lk->magic); |
| 451 | } |
| 452 | space(d+3); VG_(printf)("unique %llu\n", lk->unique); |
| 453 | space(d+3); VG_(printf)("kind %s\n", show_LockKind(lk->kind)); |
| 454 | space(d+3); VG_(printf)("heldW %s\n", lk->heldW ? "yes" : "no"); |
| 455 | space(d+3); VG_(printf)("heldBy %p", lk->heldBy); |
| 456 | if (lk->heldBy) { |
| 457 | Thread* thr; |
| 458 | Word count; |
| 459 | VG_(printf)(" { "); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 460 | VG_(initIterBag)( lk->heldBy ); |
| 461 | while (VG_(nextIterBag)( lk->heldBy, (Word*)&thr, &count )) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 462 | VG_(printf)("%lu:%p ", count, thr); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 463 | VG_(doneIterBag)( lk->heldBy ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 464 | VG_(printf)("}"); |
| 465 | } |
| 466 | VG_(printf)("\n"); |
| 467 | space(d+0); VG_(printf)("}\n"); |
| 468 | } |
| 469 | |
| 470 | static void pp_admin_locks ( Int d ) |
| 471 | { |
| 472 | Int i, n; |
| 473 | Lock* lk; |
| 474 | for (n = 0, lk = admin_locks; lk; n++, lk = lk->admin) { |
| 475 | /* nothing */ |
| 476 | } |
| 477 | space(d); VG_(printf)("admin_locks (%d records) {\n", n); |
| 478 | for (i = 0, lk = admin_locks; lk; i++, lk = lk->admin) { |
| 479 | if (0) { |
| 480 | space(n); |
| 481 | VG_(printf)("admin_locks record %d of %d:\n", i, n); |
| 482 | } |
| 483 | pp_Lock(d+3, lk); |
| 484 | } |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 485 | space(d); VG_(printf)("}\n"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | static void pp_map_locks ( Int d ) |
| 489 | { |
| 490 | void* gla; |
| 491 | Lock* lk; |
| 492 | space(d); VG_(printf)("map_locks (%d entries) {\n", |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 493 | (Int)VG_(sizeFM)( map_locks )); |
| 494 | VG_(initIterFM)( map_locks ); |
| 495 | while (VG_(nextIterFM)( map_locks, (Word*)&gla, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 496 | (Word*)&lk )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 497 | space(d+3); |
| 498 | VG_(printf)("guest %p -> Lock %p\n", gla, lk); |
| 499 | } |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 500 | VG_(doneIterFM)( map_locks ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 501 | space(d); VG_(printf)("}\n"); |
| 502 | } |
| 503 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 504 | static void pp_everything ( Int flags, Char* caller ) |
| 505 | { |
| 506 | Int d = 0; |
| 507 | VG_(printf)("\n"); |
| 508 | VG_(printf)("All_Data_Structures (caller = \"%s\") {\n", caller); |
| 509 | if (flags & PP_THREADS) { |
| 510 | VG_(printf)("\n"); |
| 511 | pp_admin_threads(d+3); |
| 512 | VG_(printf)("\n"); |
| 513 | pp_map_threads(d+3); |
| 514 | } |
| 515 | if (flags & PP_LOCKS) { |
| 516 | VG_(printf)("\n"); |
| 517 | pp_admin_locks(d+3); |
| 518 | VG_(printf)("\n"); |
| 519 | pp_map_locks(d+3); |
| 520 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 521 | |
| 522 | VG_(printf)("\n"); |
| 523 | VG_(printf)("}\n"); |
| 524 | VG_(printf)("\n"); |
| 525 | } |
| 526 | |
| 527 | #undef SHOW_ADMIN |
| 528 | |
| 529 | |
| 530 | /*----------------------------------------------------------------*/ |
| 531 | /*--- Initialise the primary data structures ---*/ |
| 532 | /*----------------------------------------------------------------*/ |
| 533 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 534 | static void initialise_data_structures ( Thr* hbthr_root ) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 535 | { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 536 | Thread* thr; |
| 537 | |
| 538 | /* Get everything initialised and zeroed. */ |
| 539 | tl_assert(admin_threads == NULL); |
| 540 | tl_assert(admin_locks == NULL); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 541 | |
| 542 | tl_assert(sizeof(Addr) == sizeof(Word)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 543 | |
| 544 | tl_assert(map_threads == NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 545 | map_threads = HG_(zalloc)( "hg.ids.1", VG_N_THREADS * sizeof(Thread*) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 546 | tl_assert(map_threads != NULL); |
| 547 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 548 | tl_assert(sizeof(Addr) == sizeof(Word)); |
| 549 | tl_assert(map_locks == NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 550 | map_locks = VG_(newFM)( HG_(zalloc), "hg.ids.2", HG_(free), |
| 551 | NULL/*unboxed Word cmp*/); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 552 | tl_assert(map_locks != NULL); |
| 553 | |
| 554 | __bus_lock_Lock = mk_LockN( LK_nonRec, (Addr)&__bus_lock ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 555 | tl_assert(HG_(is_sane_LockN)(__bus_lock_Lock)); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 556 | VG_(addToFM)( map_locks, (Word)&__bus_lock, (Word)__bus_lock_Lock ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 557 | |
| 558 | tl_assert(univ_tsets == NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 559 | univ_tsets = HG_(newWordSetU)( HG_(zalloc), "hg.ids.3", HG_(free), |
| 560 | 8/*cacheSize*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 561 | tl_assert(univ_tsets != NULL); |
| 562 | |
| 563 | tl_assert(univ_lsets == NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 564 | univ_lsets = HG_(newWordSetU)( HG_(zalloc), "hg.ids.4", HG_(free), |
| 565 | 8/*cacheSize*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 566 | tl_assert(univ_lsets != NULL); |
| 567 | |
| 568 | tl_assert(univ_laog == NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 569 | univ_laog = HG_(newWordSetU)( HG_(zalloc), "hg.ids.5 (univ_laog)", |
| 570 | HG_(free), 24/*cacheSize*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 571 | tl_assert(univ_laog != NULL); |
| 572 | |
| 573 | /* Set up entries for the root thread */ |
| 574 | // FIXME: this assumes that the first real ThreadId is 1 |
| 575 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 576 | /* a Thread for the new thread ... */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 577 | thr = mk_Thread(hbthr_root); |
| 578 | thr->coretid = 1; /* FIXME: hardwires an assumption about the |
| 579 | identity of the root thread. */ |
| 580 | tl_assert( libhb_get_Thr_opaque(hbthr_root) == NULL ); |
| 581 | libhb_set_Thr_opaque(hbthr_root, thr); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 582 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 583 | /* and bind it in the thread-map table. */ |
| 584 | tl_assert(HG_(is_sane_ThreadId)(thr->coretid)); |
| 585 | tl_assert(thr->coretid != VG_INVALID_THREADID); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 586 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 587 | map_threads[thr->coretid] = thr; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 588 | |
| 589 | tl_assert(VG_INVALID_THREADID == 0); |
| 590 | |
| 591 | /* Mark the new bus lock correctly (to stop the sanity checks |
| 592 | complaining) */ |
| 593 | tl_assert( sizeof(__bus_lock) == 4 ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 594 | |
| 595 | all__sanity_check("initialise_data_structures"); |
| 596 | } |
| 597 | |
| 598 | |
| 599 | /*----------------------------------------------------------------*/ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 600 | /*--- map_threads :: array[core-ThreadId] of Thread* ---*/ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 601 | /*----------------------------------------------------------------*/ |
| 602 | |
| 603 | /* Doesn't assert if the relevant map_threads entry is NULL. */ |
| 604 | static Thread* map_threads_maybe_lookup ( ThreadId coretid ) |
| 605 | { |
| 606 | Thread* thr; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 607 | tl_assert( HG_(is_sane_ThreadId)(coretid) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 608 | thr = map_threads[coretid]; |
| 609 | return thr; |
| 610 | } |
| 611 | |
| 612 | /* Asserts if the relevant map_threads entry is NULL. */ |
| 613 | static inline Thread* map_threads_lookup ( ThreadId coretid ) |
| 614 | { |
| 615 | Thread* thr; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 616 | tl_assert( HG_(is_sane_ThreadId)(coretid) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 617 | thr = map_threads[coretid]; |
| 618 | tl_assert(thr); |
| 619 | return thr; |
| 620 | } |
| 621 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 622 | /* Do a reverse lookup. Does not assert if 'thr' is not found in |
| 623 | map_threads. */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 624 | static ThreadId map_threads_maybe_reverse_lookup_SLOW ( Thread* thr ) |
| 625 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 626 | ThreadId tid; |
| 627 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 628 | /* Check nobody used the invalid-threadid slot */ |
| 629 | tl_assert(VG_INVALID_THREADID >= 0 && VG_INVALID_THREADID < VG_N_THREADS); |
| 630 | tl_assert(map_threads[VG_INVALID_THREADID] == NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 631 | tid = thr->coretid; |
| 632 | tl_assert(HG_(is_sane_ThreadId)(tid)); |
| 633 | return tid; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | /* Do a reverse lookup. Warning: POTENTIALLY SLOW. Asserts if 'thr' |
| 637 | is not found in map_threads. */ |
| 638 | static ThreadId map_threads_reverse_lookup_SLOW ( Thread* thr ) |
| 639 | { |
| 640 | ThreadId tid = map_threads_maybe_reverse_lookup_SLOW( thr ); |
| 641 | tl_assert(tid != VG_INVALID_THREADID); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 642 | tl_assert(map_threads[tid]); |
| 643 | tl_assert(map_threads[tid]->coretid == tid); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 644 | return tid; |
| 645 | } |
| 646 | |
| 647 | static void map_threads_delete ( ThreadId coretid ) |
| 648 | { |
| 649 | Thread* thr; |
| 650 | tl_assert(coretid != 0); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 651 | tl_assert( HG_(is_sane_ThreadId)(coretid) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 652 | thr = map_threads[coretid]; |
| 653 | tl_assert(thr); |
| 654 | map_threads[coretid] = NULL; |
| 655 | } |
| 656 | |
| 657 | |
| 658 | /*----------------------------------------------------------------*/ |
| 659 | /*--- map_locks :: WordFM guest-Addr-of-lock Lock* ---*/ |
| 660 | /*----------------------------------------------------------------*/ |
| 661 | |
| 662 | /* Make sure there is a lock table entry for the given (lock) guest |
| 663 | address. If not, create one of the stated 'kind' in unheld state. |
| 664 | In any case, return the address of the existing or new Lock. */ |
| 665 | static |
| 666 | Lock* map_locks_lookup_or_create ( LockKind lkk, Addr ga, ThreadId tid ) |
| 667 | { |
| 668 | Bool found; |
| 669 | Lock* oldlock = NULL; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 670 | tl_assert(HG_(is_sane_ThreadId)(tid)); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 671 | found = VG_(lookupFM)( map_locks, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 672 | NULL, (Word*)&oldlock, (Word)ga ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 673 | if (!found) { |
| 674 | Lock* lock = mk_LockN(lkk, ga); |
| 675 | lock->appeared_at = VG_(record_ExeContext)( tid, 0 ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 676 | tl_assert(HG_(is_sane_LockN)(lock)); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 677 | VG_(addToFM)( map_locks, (Word)ga, (Word)lock ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 678 | tl_assert(oldlock == NULL); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 679 | return lock; |
| 680 | } else { |
| 681 | tl_assert(oldlock != NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 682 | tl_assert(HG_(is_sane_LockN)(oldlock)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 683 | tl_assert(oldlock->guestaddr == ga); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 684 | return oldlock; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | static Lock* map_locks_maybe_lookup ( Addr ga ) |
| 689 | { |
| 690 | Bool found; |
| 691 | Lock* lk = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 692 | found = VG_(lookupFM)( map_locks, NULL, (Word*)&lk, (Word)ga ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 693 | tl_assert(found ? lk != NULL : lk == NULL); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 694 | return lk; |
| 695 | } |
| 696 | |
| 697 | static void map_locks_delete ( Addr ga ) |
| 698 | { |
| 699 | Addr ga2 = 0; |
| 700 | Lock* lk = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 701 | VG_(delFromFM)( map_locks, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 702 | (Word*)&ga2, (Word*)&lk, (Word)ga ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 703 | /* delFromFM produces the val which is being deleted, if it is |
| 704 | found. So assert it is non-null; that in effect asserts that we |
| 705 | are deleting a (ga, Lock) pair which actually exists. */ |
| 706 | tl_assert(lk != NULL); |
| 707 | tl_assert(ga2 == ga); |
| 708 | } |
| 709 | |
| 710 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 711 | |
| 712 | /*----------------------------------------------------------------*/ |
| 713 | /*--- Sanity checking the data structures ---*/ |
| 714 | /*----------------------------------------------------------------*/ |
| 715 | |
| 716 | static UWord stats__sanity_checks = 0; |
| 717 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 718 | static void laog__sanity_check ( Char* who ); /* fwds */ |
| 719 | |
| 720 | /* REQUIRED INVARIANTS: |
| 721 | |
| 722 | Thread vs Segment/Lock/SecMaps |
| 723 | |
| 724 | for each t in Threads { |
| 725 | |
| 726 | // Thread.lockset: each element is really a valid Lock |
| 727 | |
| 728 | // Thread.lockset: each Lock in set is actually held by that thread |
| 729 | for lk in Thread.lockset |
| 730 | lk == LockedBy(t) |
| 731 | |
| 732 | // Thread.csegid is a valid SegmentID |
| 733 | // and the associated Segment has .thr == t |
| 734 | |
| 735 | } |
| 736 | |
| 737 | all thread Locksets are pairwise empty under intersection |
| 738 | (that is, no lock is claimed to be held by more than one thread) |
| 739 | -- this is guaranteed if all locks in locksets point back to their |
| 740 | owner threads |
| 741 | |
| 742 | Lock vs Thread/Segment/SecMaps |
| 743 | |
| 744 | for each entry (gla, la) in map_locks |
| 745 | gla == la->guest_addr |
| 746 | |
| 747 | for each lk in Locks { |
| 748 | |
| 749 | lk->tag is valid |
| 750 | lk->guest_addr does not have shadow state NoAccess |
| 751 | if lk == LockedBy(t), then t->lockset contains lk |
| 752 | if lk == UnlockedBy(segid) then segid is valid SegmentID |
| 753 | and can be mapped to a valid Segment(seg) |
| 754 | and seg->thr->lockset does not contain lk |
| 755 | if lk == UnlockedNew then (no lockset contains lk) |
| 756 | |
| 757 | secmaps for lk has .mbHasLocks == True |
| 758 | |
| 759 | } |
| 760 | |
| 761 | Segment vs Thread/Lock/SecMaps |
| 762 | |
| 763 | the Segment graph is a dag (no cycles) |
| 764 | all of the Segment graph must be reachable from the segids |
| 765 | mentioned in the Threads |
| 766 | |
| 767 | for seg in Segments { |
| 768 | |
| 769 | seg->thr is a sane Thread |
| 770 | |
| 771 | } |
| 772 | |
| 773 | SecMaps vs Segment/Thread/Lock |
| 774 | |
| 775 | for sm in SecMaps { |
| 776 | |
| 777 | sm properly aligned |
| 778 | if any shadow word is ShR or ShM then .mbHasShared == True |
| 779 | |
| 780 | for each Excl(segid) state |
| 781 | map_segments_lookup maps to a sane Segment(seg) |
| 782 | for each ShM/ShR(tsetid,lsetid) state |
| 783 | each lk in lset is a valid Lock |
| 784 | each thr in tset is a valid thread, which is non-dead |
| 785 | |
| 786 | } |
| 787 | */ |
| 788 | |
| 789 | |
| 790 | /* Return True iff 'thr' holds 'lk' in some mode. */ |
| 791 | static Bool thread_is_a_holder_of_Lock ( Thread* thr, Lock* lk ) |
| 792 | { |
| 793 | if (lk->heldBy) |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 794 | return VG_(elemBag)( lk->heldBy, (Word)thr ) > 0; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 795 | else |
| 796 | return False; |
| 797 | } |
| 798 | |
| 799 | /* Sanity check Threads, as far as possible */ |
| 800 | __attribute__((noinline)) |
| 801 | static void threads__sanity_check ( Char* who ) |
| 802 | { |
| 803 | #define BAD(_str) do { how = (_str); goto bad; } while (0) |
| 804 | Char* how = "no error"; |
| 805 | Thread* thr; |
| 806 | WordSetID wsA, wsW; |
sewardj | 250ec2e | 2008-02-15 22:02:30 +0000 | [diff] [blame] | 807 | UWord* ls_words; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 808 | Word ls_size, i; |
| 809 | Lock* lk; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 810 | for (thr = admin_threads; thr; thr = thr->admin) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 811 | if (!HG_(is_sane_Thread)(thr)) BAD("1"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 812 | wsA = thr->locksetA; |
| 813 | wsW = thr->locksetW; |
| 814 | // locks held in W mode are a subset of all locks held |
| 815 | if (!HG_(isSubsetOf)( univ_lsets, wsW, wsA )) BAD("7"); |
| 816 | HG_(getPayloadWS)( &ls_words, &ls_size, univ_lsets, wsA ); |
| 817 | for (i = 0; i < ls_size; i++) { |
| 818 | lk = (Lock*)ls_words[i]; |
| 819 | // Thread.lockset: each element is really a valid Lock |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 820 | if (!HG_(is_sane_LockN)(lk)) BAD("2"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 821 | // Thread.lockset: each Lock in set is actually held by that |
| 822 | // thread |
| 823 | if (!thread_is_a_holder_of_Lock(thr,lk)) BAD("3"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 824 | } |
| 825 | } |
| 826 | return; |
| 827 | bad: |
| 828 | VG_(printf)("threads__sanity_check: who=\"%s\", bad=\"%s\"\n", who, how); |
| 829 | tl_assert(0); |
| 830 | #undef BAD |
| 831 | } |
| 832 | |
| 833 | |
| 834 | /* Sanity check Locks, as far as possible */ |
| 835 | __attribute__((noinline)) |
| 836 | static void locks__sanity_check ( Char* who ) |
| 837 | { |
| 838 | #define BAD(_str) do { how = (_str); goto bad; } while (0) |
| 839 | Char* how = "no error"; |
| 840 | Addr gla; |
| 841 | Lock* lk; |
| 842 | Int i; |
| 843 | // # entries in admin_locks == # entries in map_locks |
| 844 | for (i = 0, lk = admin_locks; lk; i++, lk = lk->admin) |
| 845 | ; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 846 | if (i != VG_(sizeFM)(map_locks)) BAD("1"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 847 | // for each entry (gla, lk) in map_locks |
| 848 | // gla == lk->guest_addr |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 849 | VG_(initIterFM)( map_locks ); |
| 850 | while (VG_(nextIterFM)( map_locks, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 851 | (Word*)&gla, (Word*)&lk )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 852 | if (lk->guestaddr != gla) BAD("2"); |
| 853 | } |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 854 | VG_(doneIterFM)( map_locks ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 855 | // scan through admin_locks ... |
| 856 | for (lk = admin_locks; lk; lk = lk->admin) { |
| 857 | // lock is sane. Quite comprehensive, also checks that |
| 858 | // referenced (holder) threads are sane. |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 859 | if (!HG_(is_sane_LockN)(lk)) BAD("3"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 860 | // map_locks binds guest address back to this lock |
| 861 | if (lk != map_locks_maybe_lookup(lk->guestaddr)) BAD("4"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 862 | // look at all threads mentioned as holders of this lock. Ensure |
| 863 | // this lock is mentioned in their locksets. |
| 864 | if (lk->heldBy) { |
| 865 | Thread* thr; |
| 866 | Word count; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 867 | VG_(initIterBag)( lk->heldBy ); |
| 868 | while (VG_(nextIterBag)( lk->heldBy, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 869 | (Word*)&thr, &count )) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 870 | // HG_(is_sane_LockN) above ensures these |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 871 | tl_assert(count >= 1); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 872 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 873 | if (!HG_(elemWS)(univ_lsets, thr->locksetA, (Word)lk)) |
| 874 | BAD("6"); |
| 875 | // also check the w-only lockset |
| 876 | if (lk->heldW |
| 877 | && !HG_(elemWS)(univ_lsets, thr->locksetW, (Word)lk)) |
| 878 | BAD("7"); |
| 879 | if ((!lk->heldW) |
| 880 | && HG_(elemWS)(univ_lsets, thr->locksetW, (Word)lk)) |
| 881 | BAD("8"); |
| 882 | } |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 883 | VG_(doneIterBag)( lk->heldBy ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 884 | } else { |
| 885 | /* lock not held by anybody */ |
| 886 | if (lk->heldW) BAD("9"); /* should be False if !heldBy */ |
| 887 | // since lk is unheld, then (no lockset contains lk) |
| 888 | // hmm, this is really too expensive to check. Hmm. |
| 889 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | return; |
| 893 | bad: |
| 894 | VG_(printf)("locks__sanity_check: who=\"%s\", bad=\"%s\"\n", who, how); |
| 895 | tl_assert(0); |
| 896 | #undef BAD |
| 897 | } |
| 898 | |
| 899 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 900 | static void all_except_Locks__sanity_check ( Char* who ) { |
| 901 | stats__sanity_checks++; |
| 902 | if (0) VG_(printf)("all_except_Locks__sanity_check(%s)\n", who); |
| 903 | threads__sanity_check(who); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 904 | laog__sanity_check(who); |
| 905 | } |
| 906 | static void all__sanity_check ( Char* who ) { |
| 907 | all_except_Locks__sanity_check(who); |
| 908 | locks__sanity_check(who); |
| 909 | } |
| 910 | |
| 911 | |
| 912 | /*----------------------------------------------------------------*/ |
| 913 | /*--- the core memory state machine (msm__* functions) ---*/ |
| 914 | /*----------------------------------------------------------------*/ |
| 915 | |
sewardj | d52392d | 2008-11-08 20:36:26 +0000 | [diff] [blame] | 916 | //static WordSetID add_BHL ( WordSetID lockset ) { |
| 917 | // return HG_(addToWS)( univ_lsets, lockset, (Word)__bus_lock_Lock ); |
| 918 | //} |
| 919 | //static WordSetID del_BHL ( WordSetID lockset ) { |
| 920 | // return HG_(delFromWS)( univ_lsets, lockset, (Word)__bus_lock_Lock ); |
| 921 | //} |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 922 | |
| 923 | |
sewardj | d52392d | 2008-11-08 20:36:26 +0000 | [diff] [blame] | 924 | ///* Last-lock-lossage records. This mechanism exists to help explain |
| 925 | // to programmers why we are complaining about a race. The idea is to |
| 926 | // monitor all lockset transitions. When a previously nonempty |
| 927 | // lockset becomes empty, the lock(s) that just disappeared (the |
| 928 | // "lossage") are the locks that have consistently protected the |
| 929 | // location (ga_of_access) in question for the longest time. Most of |
| 930 | // the time the lossage-set is a single lock. Because the |
| 931 | // lossage-lock is the one that has survived longest, there is there |
| 932 | // is a good chance that it is indeed the lock that the programmer |
| 933 | // intended to use to protect the location. |
| 934 | // |
| 935 | // Note that we cannot in general just look at the lossage set when we |
| 936 | // see a transition to ShM(...,empty-set), because a transition to an |
| 937 | // empty lockset can happen arbitrarily far before the point where we |
| 938 | // want to report an error. This is in the case where there are many |
| 939 | // transitions ShR -> ShR, all with an empty lockset, and only later |
| 940 | // is there a transition to ShM. So what we want to do is note the |
| 941 | // lossage lock at the point where a ShR -> ShR transition empties out |
| 942 | // the lockset, so we can present it later if there should be a |
| 943 | // transition to ShM. |
| 944 | // |
| 945 | // So this function finds such transitions. For each, it associates |
| 946 | // in ga_to_lastlock, the guest address and the lossage lock. In fact |
| 947 | // we do not record the Lock* directly as that may disappear later, |
| 948 | // but instead the ExeContext inside the Lock which says where it was |
| 949 | // initialised or first locked. ExeContexts are permanent so keeping |
| 950 | // them indefinitely is safe. |
| 951 | // |
| 952 | // A boring detail: the hardware bus lock is not interesting in this |
| 953 | // respect, so we first remove that from the pre/post locksets. |
| 954 | //*/ |
| 955 | // |
| 956 | //static UWord stats__ga_LL_adds = 0; |
| 957 | // |
| 958 | //static WordFM* ga_to_lastlock = NULL; /* GuestAddr -> ExeContext* */ |
| 959 | // |
| 960 | //static |
| 961 | //void record_last_lock_lossage ( Addr ga_of_access, |
| 962 | // WordSetID lset_old, WordSetID lset_new ) |
| 963 | //{ |
| 964 | // Lock* lk; |
| 965 | // Int card_old, card_new; |
| 966 | // |
| 967 | // tl_assert(lset_old != lset_new); |
| 968 | // |
| 969 | // if (0) VG_(printf)("XX1: %d (card %ld) -> %d (card %ld) %#lx\n", |
| 970 | // (Int)lset_old, |
| 971 | // HG_(cardinalityWS)(univ_lsets,lset_old), |
| 972 | // (Int)lset_new, |
| 973 | // HG_(cardinalityWS)(univ_lsets,lset_new), |
| 974 | // ga_of_access ); |
| 975 | // |
| 976 | // /* This is slow, but at least it's simple. The bus hardware lock |
| 977 | // just confuses the logic, so remove it from the locksets we're |
| 978 | // considering before doing anything else. */ |
| 979 | // lset_new = del_BHL( lset_new ); |
| 980 | // |
| 981 | // if (!HG_(isEmptyWS)( univ_lsets, lset_new )) { |
| 982 | // /* The post-transition lock set is not empty. So we are not |
| 983 | // interested. We're only interested in spotting transitions |
| 984 | // that make locksets become empty. */ |
| 985 | // return; |
| 986 | // } |
| 987 | // |
| 988 | // /* lset_new is now empty */ |
| 989 | // card_new = HG_(cardinalityWS)( univ_lsets, lset_new ); |
| 990 | // tl_assert(card_new == 0); |
| 991 | // |
| 992 | // lset_old = del_BHL( lset_old ); |
| 993 | // card_old = HG_(cardinalityWS)( univ_lsets, lset_old ); |
| 994 | // |
| 995 | // if (0) VG_(printf)(" X2: %d (card %d) -> %d (card %d)\n", |
| 996 | // (Int)lset_old, card_old, (Int)lset_new, card_new ); |
| 997 | // |
| 998 | // if (card_old == 0) { |
| 999 | // /* The old lockset was also empty. Not interesting. */ |
| 1000 | // return; |
| 1001 | // } |
| 1002 | // |
| 1003 | // tl_assert(card_old > 0); |
| 1004 | // tl_assert(!HG_(isEmptyWS)( univ_lsets, lset_old )); |
| 1005 | // |
| 1006 | // /* Now we know we've got a transition from a nonempty lockset to an |
| 1007 | // empty one. So lset_old must be the set of locks lost. Record |
| 1008 | // some details. If there is more than one element in the lossage |
| 1009 | // set, just choose one arbitrarily -- not the best, but at least |
| 1010 | // it's simple. */ |
| 1011 | // |
| 1012 | // lk = (Lock*)HG_(anyElementOfWS)( univ_lsets, lset_old ); |
| 1013 | // if (0) VG_(printf)("lossage %ld %p\n", |
| 1014 | // HG_(cardinalityWS)( univ_lsets, lset_old), lk ); |
| 1015 | // if (lk->appeared_at) { |
| 1016 | // if (ga_to_lastlock == NULL) |
| 1017 | // ga_to_lastlock = VG_(newFM)( HG_(zalloc), "hg.rlll.1", HG_(free), NULL ); |
| 1018 | // VG_(addToFM)( ga_to_lastlock, ga_of_access, (Word)lk->appeared_at ); |
| 1019 | // stats__ga_LL_adds++; |
| 1020 | // } |
| 1021 | //} |
| 1022 | // |
| 1023 | ///* This queries the table (ga_to_lastlock) made by |
| 1024 | // record_last_lock_lossage, when constructing error messages. It |
| 1025 | // attempts to find the ExeContext of the allocation or initialisation |
| 1026 | // point for the lossage lock associated with 'ga'. */ |
| 1027 | // |
| 1028 | //static ExeContext* maybe_get_lastlock_initpoint ( Addr ga ) |
| 1029 | //{ |
| 1030 | // ExeContext* ec_hint = NULL; |
| 1031 | // if (ga_to_lastlock != NULL |
| 1032 | // && VG_(lookupFM)(ga_to_lastlock, |
| 1033 | // NULL, (Word*)&ec_hint, ga)) { |
| 1034 | // tl_assert(ec_hint != NULL); |
| 1035 | // return ec_hint; |
| 1036 | // } else { |
| 1037 | // return NULL; |
| 1038 | // } |
| 1039 | //} |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1040 | |
| 1041 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1042 | /*----------------------------------------------------------------*/ |
| 1043 | /*--- Shadow value and address range handlers ---*/ |
| 1044 | /*----------------------------------------------------------------*/ |
| 1045 | |
| 1046 | static void laog__pre_thread_acquires_lock ( Thread*, Lock* ); /* fwds */ |
sewardj | 1cbc12f | 2008-11-10 16:16:46 +0000 | [diff] [blame] | 1047 | //static void laog__handle_lock_deletions ( WordSetID ); /* fwds */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1048 | static inline Thread* get_current_Thread ( void ); /* fwds */ |
sewardj | 1cbc12f | 2008-11-10 16:16:46 +0000 | [diff] [blame] | 1049 | __attribute__((noinline)) |
| 1050 | static void laog__handle_one_lock_deletion ( Lock* lk ); /* fwds */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1051 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1052 | |
| 1053 | /* Block-copy states (needed for implementing realloc()). */ |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1054 | /* FIXME this copies shadow memory; it doesn't apply the MSM to it. |
| 1055 | Is that a problem? (hence 'scopy' rather than 'ccopy') */ |
| 1056 | static void shadow_mem_scopy_range ( Thread* thr, |
| 1057 | Addr src, Addr dst, SizeT len ) |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1058 | { |
| 1059 | Thr* hbthr = thr->hbthr; |
| 1060 | tl_assert(hbthr); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1061 | libhb_copy_shadow_state( hbthr, src, dst, len ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1062 | } |
| 1063 | |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1064 | static void shadow_mem_cread_range ( Thread* thr, Addr a, SizeT len ) |
| 1065 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1066 | Thr* hbthr = thr->hbthr; |
| 1067 | tl_assert(hbthr); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1068 | LIBHB_CREAD_N(hbthr, a, len); |
| 1069 | } |
| 1070 | |
| 1071 | static void shadow_mem_cwrite_range ( Thread* thr, Addr a, SizeT len ) { |
| 1072 | Thr* hbthr = thr->hbthr; |
| 1073 | tl_assert(hbthr); |
| 1074 | LIBHB_CWRITE_N(hbthr, a, len); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1075 | } |
| 1076 | |
| 1077 | static void shadow_mem_make_New ( Thread* thr, Addr a, SizeT len ) |
| 1078 | { |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1079 | libhb_srange_new( thr->hbthr, a, len ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1080 | } |
| 1081 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1082 | static void shadow_mem_make_NoAccess ( Thread* thr, Addr aIN, SizeT len ) |
| 1083 | { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1084 | if (0 && len > 500) |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 1085 | VG_(printf)("make NoAccess ( %#lx, %ld )\n", aIN, len ); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1086 | libhb_srange_noaccess( thr->hbthr, aIN, len ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1087 | } |
| 1088 | |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 1089 | static void shadow_mem_make_Untracked ( Thread* thr, Addr aIN, SizeT len ) |
| 1090 | { |
| 1091 | if (0 && len > 500) |
| 1092 | VG_(printf)("make Untracked ( %#lx, %ld )\n", aIN, len ); |
| 1093 | libhb_srange_untrack( thr->hbthr, aIN, len ); |
| 1094 | } |
| 1095 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1096 | |
| 1097 | /*----------------------------------------------------------------*/ |
| 1098 | /*--- Event handlers (evh__* functions) ---*/ |
| 1099 | /*--- plus helpers (evhH__* functions) ---*/ |
| 1100 | /*----------------------------------------------------------------*/ |
| 1101 | |
| 1102 | /*--------- Event handler helpers (evhH__* functions) ---------*/ |
| 1103 | |
| 1104 | /* Create a new segment for 'thr', making it depend (.prev) on its |
| 1105 | existing segment, bind together the SegmentID and Segment, and |
| 1106 | return both of them. Also update 'thr' so it references the new |
| 1107 | Segment. */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1108 | //zz static |
| 1109 | //zz void evhH__start_new_segment_for_thread ( /*OUT*/SegmentID* new_segidP, |
| 1110 | //zz /*OUT*/Segment** new_segP, |
| 1111 | //zz Thread* thr ) |
| 1112 | //zz { |
| 1113 | //zz Segment* cur_seg; |
| 1114 | //zz tl_assert(new_segP); |
| 1115 | //zz tl_assert(new_segidP); |
| 1116 | //zz tl_assert(HG_(is_sane_Thread)(thr)); |
| 1117 | //zz cur_seg = map_segments_lookup( thr->csegid ); |
| 1118 | //zz tl_assert(cur_seg); |
| 1119 | //zz tl_assert(cur_seg->thr == thr); /* all sane segs should point back |
| 1120 | //zz at their owner thread. */ |
| 1121 | //zz *new_segP = mk_Segment( thr, cur_seg, NULL/*other*/ ); |
| 1122 | //zz *new_segidP = alloc_SegmentID(); |
| 1123 | //zz map_segments_add( *new_segidP, *new_segP ); |
| 1124 | //zz thr->csegid = *new_segidP; |
| 1125 | //zz } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1126 | |
| 1127 | |
| 1128 | /* The lock at 'lock_ga' has acquired a writer. Make all necessary |
| 1129 | updates, and also do all possible error checks. */ |
| 1130 | static |
| 1131 | void evhH__post_thread_w_acquires_lock ( Thread* thr, |
| 1132 | LockKind lkk, Addr lock_ga ) |
| 1133 | { |
| 1134 | Lock* lk; |
| 1135 | |
| 1136 | /* Basically what we need to do is call lockN_acquire_writer. |
| 1137 | However, that will barf if any 'invalid' lock states would |
| 1138 | result. Therefore check before calling. Side effect is that |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1139 | 'HG_(is_sane_LockN)(lk)' is both a pre- and post-condition of this |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1140 | routine. |
| 1141 | |
| 1142 | Because this routine is only called after successful lock |
| 1143 | acquisition, we should not be asked to move the lock into any |
| 1144 | invalid states. Requests to do so are bugs in libpthread, since |
| 1145 | that should have rejected any such requests. */ |
| 1146 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1147 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1148 | /* Try to find the lock. If we can't, then create a new one with |
| 1149 | kind 'lkk'. */ |
| 1150 | lk = map_locks_lookup_or_create( |
| 1151 | lkk, lock_ga, map_threads_reverse_lookup_SLOW(thr) ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1152 | tl_assert( HG_(is_sane_LockN)(lk) ); |
| 1153 | |
| 1154 | /* check libhb level entities exist */ |
| 1155 | tl_assert(thr->hbthr); |
| 1156 | tl_assert(lk->hbso); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1157 | |
| 1158 | if (lk->heldBy == NULL) { |
| 1159 | /* the lock isn't held. Simple. */ |
| 1160 | tl_assert(!lk->heldW); |
| 1161 | lockN_acquire_writer( lk, thr ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1162 | /* acquire a dependency from the lock's VCs */ |
| 1163 | libhb_so_recv( thr->hbthr, lk->hbso, True/*strong_recv*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1164 | goto noerror; |
| 1165 | } |
| 1166 | |
| 1167 | /* So the lock is already held. If held as a r-lock then |
| 1168 | libpthread must be buggy. */ |
| 1169 | tl_assert(lk->heldBy); |
| 1170 | if (!lk->heldW) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1171 | HG_(record_error_Misc)( |
| 1172 | thr, "Bug in libpthread: write lock " |
| 1173 | "granted on rwlock which is currently rd-held"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1174 | goto error; |
| 1175 | } |
| 1176 | |
| 1177 | /* So the lock is held in w-mode. If it's held by some other |
| 1178 | thread, then libpthread must be buggy. */ |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 1179 | tl_assert(VG_(sizeUniqueBag)(lk->heldBy) == 1); /* from precondition */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1180 | |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 1181 | if (thr != (Thread*)VG_(anyElementOfBag)(lk->heldBy)) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1182 | HG_(record_error_Misc)( |
| 1183 | thr, "Bug in libpthread: write lock " |
| 1184 | "granted on mutex/rwlock which is currently " |
| 1185 | "wr-held by a different thread"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1186 | goto error; |
| 1187 | } |
| 1188 | |
| 1189 | /* So the lock is already held in w-mode by 'thr'. That means this |
| 1190 | is an attempt to lock it recursively, which is only allowable |
| 1191 | for LK_mbRec kinded locks. Since this routine is called only |
| 1192 | once the lock has been acquired, this must also be a libpthread |
| 1193 | bug. */ |
| 1194 | if (lk->kind != LK_mbRec) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1195 | HG_(record_error_Misc)( |
| 1196 | thr, "Bug in libpthread: recursive write lock " |
| 1197 | "granted on mutex/wrlock which does not " |
| 1198 | "support recursion"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1199 | goto error; |
| 1200 | } |
| 1201 | |
| 1202 | /* So we are recursively re-locking a lock we already w-hold. */ |
| 1203 | lockN_acquire_writer( lk, thr ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1204 | /* acquire a dependency from the lock's VC. Probably pointless, |
| 1205 | but also harmless. */ |
| 1206 | libhb_so_recv( thr->hbthr, lk->hbso, True/*strong_recv*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1207 | goto noerror; |
| 1208 | |
| 1209 | noerror: |
| 1210 | /* check lock order acquisition graph, and update. This has to |
| 1211 | happen before the lock is added to the thread's locksetA/W. */ |
| 1212 | laog__pre_thread_acquires_lock( thr, lk ); |
| 1213 | /* update the thread's held-locks set */ |
| 1214 | thr->locksetA = HG_(addToWS)( univ_lsets, thr->locksetA, (Word)lk ); |
| 1215 | thr->locksetW = HG_(addToWS)( univ_lsets, thr->locksetW, (Word)lk ); |
| 1216 | /* fall through */ |
| 1217 | |
| 1218 | error: |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1219 | tl_assert(HG_(is_sane_LockN)(lk)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1220 | } |
| 1221 | |
| 1222 | |
| 1223 | /* The lock at 'lock_ga' has acquired a reader. Make all necessary |
| 1224 | updates, and also do all possible error checks. */ |
| 1225 | static |
| 1226 | void evhH__post_thread_r_acquires_lock ( Thread* thr, |
| 1227 | LockKind lkk, Addr lock_ga ) |
| 1228 | { |
| 1229 | Lock* lk; |
| 1230 | |
| 1231 | /* Basically what we need to do is call lockN_acquire_reader. |
| 1232 | However, that will barf if any 'invalid' lock states would |
| 1233 | result. Therefore check before calling. Side effect is that |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1234 | 'HG_(is_sane_LockN)(lk)' is both a pre- and post-condition of this |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1235 | routine. |
| 1236 | |
| 1237 | Because this routine is only called after successful lock |
| 1238 | acquisition, we should not be asked to move the lock into any |
| 1239 | invalid states. Requests to do so are bugs in libpthread, since |
| 1240 | that should have rejected any such requests. */ |
| 1241 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1242 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1243 | /* Try to find the lock. If we can't, then create a new one with |
| 1244 | kind 'lkk'. Only a reader-writer lock can be read-locked, |
| 1245 | hence the first assertion. */ |
| 1246 | tl_assert(lkk == LK_rdwr); |
| 1247 | lk = map_locks_lookup_or_create( |
| 1248 | lkk, lock_ga, map_threads_reverse_lookup_SLOW(thr) ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1249 | tl_assert( HG_(is_sane_LockN)(lk) ); |
| 1250 | |
| 1251 | /* check libhb level entities exist */ |
| 1252 | tl_assert(thr->hbthr); |
| 1253 | tl_assert(lk->hbso); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1254 | |
| 1255 | if (lk->heldBy == NULL) { |
| 1256 | /* the lock isn't held. Simple. */ |
| 1257 | tl_assert(!lk->heldW); |
| 1258 | lockN_acquire_reader( lk, thr ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1259 | /* acquire a dependency from the lock's VC */ |
| 1260 | libhb_so_recv( thr->hbthr, lk->hbso, False/*!strong_recv*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1261 | goto noerror; |
| 1262 | } |
| 1263 | |
| 1264 | /* So the lock is already held. If held as a w-lock then |
| 1265 | libpthread must be buggy. */ |
| 1266 | tl_assert(lk->heldBy); |
| 1267 | if (lk->heldW) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1268 | HG_(record_error_Misc)( thr, "Bug in libpthread: read lock " |
| 1269 | "granted on rwlock which is " |
| 1270 | "currently wr-held"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1271 | goto error; |
| 1272 | } |
| 1273 | |
| 1274 | /* Easy enough. In short anybody can get a read-lock on a rwlock |
| 1275 | provided it is either unlocked or already in rd-held. */ |
| 1276 | lockN_acquire_reader( lk, thr ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1277 | /* acquire a dependency from the lock's VC. Probably pointless, |
| 1278 | but also harmless. */ |
| 1279 | libhb_so_recv( thr->hbthr, lk->hbso, False/*!strong_recv*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1280 | goto noerror; |
| 1281 | |
| 1282 | noerror: |
| 1283 | /* check lock order acquisition graph, and update. This has to |
| 1284 | happen before the lock is added to the thread's locksetA/W. */ |
| 1285 | laog__pre_thread_acquires_lock( thr, lk ); |
| 1286 | /* update the thread's held-locks set */ |
| 1287 | thr->locksetA = HG_(addToWS)( univ_lsets, thr->locksetA, (Word)lk ); |
| 1288 | /* but don't update thr->locksetW, since lk is only rd-held */ |
| 1289 | /* fall through */ |
| 1290 | |
| 1291 | error: |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1292 | tl_assert(HG_(is_sane_LockN)(lk)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1293 | } |
| 1294 | |
| 1295 | |
| 1296 | /* The lock at 'lock_ga' is just about to be unlocked. Make all |
| 1297 | necessary updates, and also do all possible error checks. */ |
| 1298 | static |
| 1299 | void evhH__pre_thread_releases_lock ( Thread* thr, |
| 1300 | Addr lock_ga, Bool isRDWR ) |
| 1301 | { |
| 1302 | Lock* lock; |
| 1303 | Word n; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1304 | Bool was_heldW; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1305 | |
| 1306 | /* This routine is called prior to a lock release, before |
| 1307 | libpthread has had a chance to validate the call. Hence we need |
| 1308 | to detect and reject any attempts to move the lock into an |
| 1309 | invalid state. Such attempts are bugs in the client. |
| 1310 | |
| 1311 | isRDWR is True if we know from the wrapper context that lock_ga |
| 1312 | should refer to a reader-writer lock, and is False if [ditto] |
| 1313 | lock_ga should refer to a standard mutex. */ |
| 1314 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1315 | tl_assert(HG_(is_sane_Thread)(thr)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1316 | lock = map_locks_maybe_lookup( lock_ga ); |
| 1317 | |
| 1318 | if (!lock) { |
| 1319 | /* We know nothing about a lock at 'lock_ga'. Nevertheless |
| 1320 | the client is trying to unlock it. So complain, then ignore |
| 1321 | the attempt. */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1322 | HG_(record_error_UnlockBogus)( thr, lock_ga ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1323 | return; |
| 1324 | } |
| 1325 | |
| 1326 | tl_assert(lock->guestaddr == lock_ga); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1327 | tl_assert(HG_(is_sane_LockN)(lock)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1328 | |
| 1329 | if (isRDWR && lock->kind != LK_rdwr) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1330 | HG_(record_error_Misc)( thr, "pthread_rwlock_unlock with a " |
| 1331 | "pthread_mutex_t* argument " ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1332 | } |
| 1333 | if ((!isRDWR) && lock->kind == LK_rdwr) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1334 | HG_(record_error_Misc)( thr, "pthread_mutex_unlock with a " |
| 1335 | "pthread_rwlock_t* argument " ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1336 | } |
| 1337 | |
| 1338 | if (!lock->heldBy) { |
| 1339 | /* The lock is not held. This indicates a serious bug in the |
| 1340 | client. */ |
| 1341 | tl_assert(!lock->heldW); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1342 | HG_(record_error_UnlockUnlocked)( thr, lock ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1343 | tl_assert(!HG_(elemWS)( univ_lsets, thr->locksetA, (Word)lock )); |
| 1344 | tl_assert(!HG_(elemWS)( univ_lsets, thr->locksetW, (Word)lock )); |
| 1345 | goto error; |
| 1346 | } |
| 1347 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1348 | /* test just above dominates */ |
| 1349 | tl_assert(lock->heldBy); |
| 1350 | was_heldW = lock->heldW; |
| 1351 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1352 | /* The lock is held. Is this thread one of the holders? If not, |
| 1353 | report a bug in the client. */ |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 1354 | n = VG_(elemBag)( lock->heldBy, (Word)thr ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1355 | tl_assert(n >= 0); |
| 1356 | if (n == 0) { |
| 1357 | /* We are not a current holder of the lock. This is a bug in |
| 1358 | the guest, and (per POSIX pthread rules) the unlock |
| 1359 | attempt will fail. So just complain and do nothing |
| 1360 | else. */ |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 1361 | Thread* realOwner = (Thread*)VG_(anyElementOfBag)( lock->heldBy ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1362 | tl_assert(HG_(is_sane_Thread)(realOwner)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1363 | tl_assert(realOwner != thr); |
| 1364 | tl_assert(!HG_(elemWS)( univ_lsets, thr->locksetA, (Word)lock )); |
| 1365 | tl_assert(!HG_(elemWS)( univ_lsets, thr->locksetW, (Word)lock )); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1366 | HG_(record_error_UnlockForeign)( thr, realOwner, lock ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1367 | goto error; |
| 1368 | } |
| 1369 | |
| 1370 | /* Ok, we hold the lock 'n' times. */ |
| 1371 | tl_assert(n >= 1); |
| 1372 | |
| 1373 | lockN_release( lock, thr ); |
| 1374 | |
| 1375 | n--; |
| 1376 | tl_assert(n >= 0); |
| 1377 | |
| 1378 | if (n > 0) { |
| 1379 | tl_assert(lock->heldBy); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 1380 | tl_assert(n == VG_(elemBag)( lock->heldBy, (Word)thr )); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1381 | /* We still hold the lock. So either it's a recursive lock |
| 1382 | or a rwlock which is currently r-held. */ |
| 1383 | tl_assert(lock->kind == LK_mbRec |
| 1384 | || (lock->kind == LK_rdwr && !lock->heldW)); |
| 1385 | tl_assert(HG_(elemWS)( univ_lsets, thr->locksetA, (Word)lock )); |
| 1386 | if (lock->heldW) |
| 1387 | tl_assert(HG_(elemWS)( univ_lsets, thr->locksetW, (Word)lock )); |
| 1388 | else |
| 1389 | tl_assert(!HG_(elemWS)( univ_lsets, thr->locksetW, (Word)lock )); |
| 1390 | } else { |
sewardj | 983f302 | 2009-05-21 14:49:55 +0000 | [diff] [blame] | 1391 | /* n is zero. This means we don't hold the lock any more. But |
| 1392 | if it's a rwlock held in r-mode, someone else could still |
| 1393 | hold it. Just do whatever sanity checks we can. */ |
| 1394 | if (lock->kind == LK_rdwr && lock->heldBy) { |
| 1395 | /* It's a rwlock. We no longer hold it but we used to; |
| 1396 | nevertheless it still appears to be held by someone else. |
| 1397 | The implication is that, prior to this release, it must |
| 1398 | have been shared by us and and whoever else is holding it; |
| 1399 | which in turn implies it must be r-held, since a lock |
| 1400 | can't be w-held by more than one thread. */ |
| 1401 | /* The lock is now R-held by somebody else: */ |
| 1402 | tl_assert(lock->heldW == False); |
| 1403 | } else { |
| 1404 | /* Normal case. It's either not a rwlock, or it's a rwlock |
| 1405 | that we used to hold in w-mode (which is pretty much the |
| 1406 | same thing as a non-rwlock.) Since this transaction is |
| 1407 | atomic (V does not allow multiple threads to run |
| 1408 | simultaneously), it must mean the lock is now not held by |
| 1409 | anybody. Hence assert for it. */ |
| 1410 | /* The lock is now not held by anybody: */ |
| 1411 | tl_assert(!lock->heldBy); |
| 1412 | tl_assert(lock->heldW == False); |
| 1413 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1414 | //if (lock->heldBy) { |
| 1415 | // tl_assert(0 == VG_(elemBag)( lock->heldBy, (Word)thr )); |
| 1416 | //} |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1417 | /* update this thread's lockset accordingly. */ |
| 1418 | thr->locksetA |
| 1419 | = HG_(delFromWS)( univ_lsets, thr->locksetA, (Word)lock ); |
| 1420 | thr->locksetW |
| 1421 | = HG_(delFromWS)( univ_lsets, thr->locksetW, (Word)lock ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1422 | /* push our VC into the lock */ |
| 1423 | tl_assert(thr->hbthr); |
| 1424 | tl_assert(lock->hbso); |
| 1425 | /* If the lock was previously W-held, then we want to do a |
| 1426 | strong send, and if previously R-held, then a weak send. */ |
| 1427 | libhb_so_send( thr->hbthr, lock->hbso, was_heldW ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1428 | } |
| 1429 | /* fall through */ |
| 1430 | |
| 1431 | error: |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1432 | tl_assert(HG_(is_sane_LockN)(lock)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1433 | } |
| 1434 | |
| 1435 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 1436 | /* ---------------------------------------------------------- */ |
| 1437 | /* -------- Event handlers proper (evh__* functions) -------- */ |
| 1438 | /* ---------------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1439 | |
| 1440 | /* What is the Thread* for the currently running thread? This is |
| 1441 | absolutely performance critical. We receive notifications from the |
| 1442 | core for client code starts/stops, and cache the looked-up result |
| 1443 | in 'current_Thread'. Hence, for the vast majority of requests, |
| 1444 | finding the current thread reduces to a read of a global variable, |
| 1445 | provided get_current_Thread_in_C_C is inlined. |
| 1446 | |
| 1447 | Outside of client code, current_Thread is NULL, and presumably |
| 1448 | any uses of it will cause a segfault. Hence: |
| 1449 | |
| 1450 | - for uses definitely within client code, use |
| 1451 | get_current_Thread_in_C_C. |
| 1452 | |
| 1453 | - for all other uses, use get_current_Thread. |
| 1454 | */ |
| 1455 | |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1456 | static Thread *current_Thread = NULL, |
| 1457 | *current_Thread_prev = NULL; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1458 | |
| 1459 | static void evh__start_client_code ( ThreadId tid, ULong nDisp ) { |
| 1460 | if (0) VG_(printf)("start %d %llu\n", (Int)tid, nDisp); |
| 1461 | tl_assert(current_Thread == NULL); |
| 1462 | current_Thread = map_threads_lookup( tid ); |
| 1463 | tl_assert(current_Thread != NULL); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1464 | if (current_Thread != current_Thread_prev) { |
| 1465 | libhb_Thr_resumes( current_Thread->hbthr ); |
| 1466 | current_Thread_prev = current_Thread; |
| 1467 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1468 | } |
| 1469 | static void evh__stop_client_code ( ThreadId tid, ULong nDisp ) { |
| 1470 | if (0) VG_(printf)(" stop %d %llu\n", (Int)tid, nDisp); |
| 1471 | tl_assert(current_Thread != NULL); |
| 1472 | current_Thread = NULL; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1473 | libhb_maybe_GC(); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1474 | } |
| 1475 | static inline Thread* get_current_Thread_in_C_C ( void ) { |
| 1476 | return current_Thread; |
| 1477 | } |
| 1478 | static inline Thread* get_current_Thread ( void ) { |
| 1479 | ThreadId coretid; |
| 1480 | Thread* thr; |
| 1481 | thr = get_current_Thread_in_C_C(); |
| 1482 | if (LIKELY(thr)) |
| 1483 | return thr; |
| 1484 | /* evidently not in client code. Do it the slow way. */ |
| 1485 | coretid = VG_(get_running_tid)(); |
| 1486 | /* FIXME: get rid of the following kludge. It exists because |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1487 | evh__new_mem is called during initialisation (as notification |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1488 | of initial memory layout) and VG_(get_running_tid)() returns |
| 1489 | VG_INVALID_THREADID at that point. */ |
| 1490 | if (coretid == VG_INVALID_THREADID) |
| 1491 | coretid = 1; /* KLUDGE */ |
| 1492 | thr = map_threads_lookup( coretid ); |
| 1493 | return thr; |
| 1494 | } |
| 1495 | |
| 1496 | static |
| 1497 | void evh__new_mem ( Addr a, SizeT len ) { |
| 1498 | if (SHOW_EVENTS >= 2) |
| 1499 | VG_(printf)("evh__new_mem(%p, %lu)\n", (void*)a, len ); |
| 1500 | shadow_mem_make_New( get_current_Thread(), a, len ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1501 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1502 | all__sanity_check("evh__new_mem-post"); |
| 1503 | } |
| 1504 | |
| 1505 | static |
sewardj | 1f77fec | 2010-04-12 19:51:04 +0000 | [diff] [blame] | 1506 | void evh__new_mem_stack ( Addr a, SizeT len ) { |
| 1507 | if (SHOW_EVENTS >= 2) |
| 1508 | VG_(printf)("evh__new_mem_stack(%p, %lu)\n", (void*)a, len ); |
| 1509 | shadow_mem_make_New( get_current_Thread(), |
| 1510 | -VG_STACK_REDZONE_SZB + a, len ); |
| 1511 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
| 1512 | all__sanity_check("evh__new_mem_stack-post"); |
| 1513 | } |
| 1514 | |
| 1515 | static |
sewardj | 7cf4e6b | 2008-05-01 20:24:26 +0000 | [diff] [blame] | 1516 | void evh__new_mem_w_tid ( Addr a, SizeT len, ThreadId tid ) { |
| 1517 | if (SHOW_EVENTS >= 2) |
| 1518 | VG_(printf)("evh__new_mem_w_tid(%p, %lu)\n", (void*)a, len ); |
| 1519 | shadow_mem_make_New( get_current_Thread(), a, len ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1520 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | 7cf4e6b | 2008-05-01 20:24:26 +0000 | [diff] [blame] | 1521 | all__sanity_check("evh__new_mem_w_tid-post"); |
| 1522 | } |
| 1523 | |
| 1524 | static |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1525 | void evh__new_mem_w_perms ( Addr a, SizeT len, |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 1526 | Bool rr, Bool ww, Bool xx, ULong di_handle ) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1527 | if (SHOW_EVENTS >= 1) |
| 1528 | VG_(printf)("evh__new_mem_w_perms(%p, %lu, %d,%d,%d)\n", |
| 1529 | (void*)a, len, (Int)rr, (Int)ww, (Int)xx ); |
| 1530 | if (rr || ww || xx) |
| 1531 | shadow_mem_make_New( get_current_Thread(), a, len ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1532 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1533 | all__sanity_check("evh__new_mem_w_perms-post"); |
| 1534 | } |
| 1535 | |
| 1536 | static |
| 1537 | void evh__set_perms ( Addr a, SizeT len, |
| 1538 | Bool rr, Bool ww, Bool xx ) { |
| 1539 | if (SHOW_EVENTS >= 1) |
| 1540 | VG_(printf)("evh__set_perms(%p, %lu, %d,%d,%d)\n", |
| 1541 | (void*)a, len, (Int)rr, (Int)ww, (Int)xx ); |
| 1542 | /* Hmm. What should we do here, that actually makes any sense? |
| 1543 | Let's say: if neither readable nor writable, then declare it |
| 1544 | NoAccess, else leave it alone. */ |
| 1545 | if (!(rr || ww)) |
| 1546 | shadow_mem_make_NoAccess( get_current_Thread(), a, len ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1547 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1548 | all__sanity_check("evh__set_perms-post"); |
| 1549 | } |
| 1550 | |
| 1551 | static |
| 1552 | void evh__die_mem ( Addr a, SizeT len ) { |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 1553 | // urr, libhb ignores this. |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1554 | if (SHOW_EVENTS >= 2) |
| 1555 | VG_(printf)("evh__die_mem(%p, %lu)\n", (void*)a, len ); |
| 1556 | shadow_mem_make_NoAccess( get_current_Thread(), a, len ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1557 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1558 | all__sanity_check("evh__die_mem-post"); |
| 1559 | } |
| 1560 | |
| 1561 | static |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 1562 | void evh__untrack_mem ( Addr a, SizeT len ) { |
| 1563 | // whereas it doesn't ignore this |
| 1564 | if (SHOW_EVENTS >= 2) |
| 1565 | VG_(printf)("evh__untrack_mem(%p, %lu)\n", (void*)a, len ); |
| 1566 | shadow_mem_make_Untracked( get_current_Thread(), a, len ); |
| 1567 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
| 1568 | all__sanity_check("evh__untrack_mem-post"); |
| 1569 | } |
| 1570 | |
| 1571 | static |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1572 | void evh__copy_mem ( Addr src, Addr dst, SizeT len ) { |
| 1573 | if (SHOW_EVENTS >= 2) |
| 1574 | VG_(printf)("evh__copy_mem(%p, %p, %lu)\n", (void*)src, (void*)dst, len ); |
| 1575 | shadow_mem_scopy_range( get_current_Thread(), src, dst, len ); |
| 1576 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
| 1577 | all__sanity_check("evh__copy_mem-post"); |
| 1578 | } |
| 1579 | |
| 1580 | static |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1581 | void evh__pre_thread_ll_create ( ThreadId parent, ThreadId child ) |
| 1582 | { |
| 1583 | if (SHOW_EVENTS >= 1) |
| 1584 | VG_(printf)("evh__pre_thread_ll_create(p=%d, c=%d)\n", |
| 1585 | (Int)parent, (Int)child ); |
| 1586 | |
| 1587 | if (parent != VG_INVALID_THREADID) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1588 | Thread* thr_p; |
| 1589 | Thread* thr_c; |
| 1590 | Thr* hbthr_p; |
| 1591 | Thr* hbthr_c; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1592 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1593 | tl_assert(HG_(is_sane_ThreadId)(parent)); |
| 1594 | tl_assert(HG_(is_sane_ThreadId)(child)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1595 | tl_assert(parent != child); |
| 1596 | |
| 1597 | thr_p = map_threads_maybe_lookup( parent ); |
| 1598 | thr_c = map_threads_maybe_lookup( child ); |
| 1599 | |
| 1600 | tl_assert(thr_p != NULL); |
| 1601 | tl_assert(thr_c == NULL); |
| 1602 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1603 | hbthr_p = thr_p->hbthr; |
| 1604 | tl_assert(hbthr_p != NULL); |
| 1605 | tl_assert( libhb_get_Thr_opaque(hbthr_p) == thr_p ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1606 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1607 | hbthr_c = libhb_create ( hbthr_p ); |
| 1608 | |
| 1609 | /* Create a new thread record for the child. */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1610 | /* a Thread for the new thread ... */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1611 | thr_c = mk_Thread( hbthr_c ); |
| 1612 | tl_assert( libhb_get_Thr_opaque(hbthr_c) == NULL ); |
| 1613 | libhb_set_Thr_opaque(hbthr_c, thr_c); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1614 | |
| 1615 | /* and bind it in the thread-map table */ |
| 1616 | map_threads[child] = thr_c; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1617 | tl_assert(thr_c->coretid == VG_INVALID_THREADID); |
| 1618 | thr_c->coretid = child; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1619 | |
| 1620 | /* Record where the parent is so we can later refer to this in |
| 1621 | error messages. |
| 1622 | |
| 1623 | On amd64-linux, this entails a nasty glibc-2.5 specific hack. |
| 1624 | The stack snapshot is taken immediately after the parent has |
| 1625 | returned from its sys_clone call. Unfortunately there is no |
| 1626 | unwind info for the insn following "syscall" - reading the |
| 1627 | glibc sources confirms this. So we ask for a snapshot to be |
| 1628 | taken as if RIP was 3 bytes earlier, in a place where there |
| 1629 | is unwind info. Sigh. |
| 1630 | */ |
| 1631 | { Word first_ip_delta = 0; |
| 1632 | # if defined(VGP_amd64_linux) |
| 1633 | first_ip_delta = -3; |
| 1634 | # endif |
| 1635 | thr_c->created_at = VG_(record_ExeContext)(parent, first_ip_delta); |
| 1636 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1637 | } |
| 1638 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1639 | if (HG_(clo_sanity_flags) & SCE_THREADS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1640 | all__sanity_check("evh__pre_thread_create-post"); |
| 1641 | } |
| 1642 | |
| 1643 | static |
| 1644 | void evh__pre_thread_ll_exit ( ThreadId quit_tid ) |
| 1645 | { |
| 1646 | Int nHeld; |
| 1647 | Thread* thr_q; |
| 1648 | if (SHOW_EVENTS >= 1) |
| 1649 | VG_(printf)("evh__pre_thread_ll_exit(thr=%d)\n", |
| 1650 | (Int)quit_tid ); |
| 1651 | |
| 1652 | /* quit_tid has disappeared without joining to any other thread. |
| 1653 | Therefore there is no synchronisation event associated with its |
| 1654 | exit and so we have to pretty much treat it as if it was still |
| 1655 | alive but mysteriously making no progress. That is because, if |
| 1656 | we don't know when it really exited, then we can never say there |
| 1657 | is a point in time when we're sure the thread really has |
| 1658 | finished, and so we need to consider the possibility that it |
| 1659 | lingers indefinitely and continues to interact with other |
| 1660 | threads. */ |
| 1661 | /* However, it might have rendezvous'd with a thread that called |
| 1662 | pthread_join with this one as arg, prior to this point (that's |
| 1663 | how NPTL works). In which case there has already been a prior |
| 1664 | sync event. So in any case, just let the thread exit. On NPTL, |
| 1665 | all thread exits go through here. */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1666 | tl_assert(HG_(is_sane_ThreadId)(quit_tid)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1667 | thr_q = map_threads_maybe_lookup( quit_tid ); |
| 1668 | tl_assert(thr_q != NULL); |
| 1669 | |
| 1670 | /* Complain if this thread holds any locks. */ |
| 1671 | nHeld = HG_(cardinalityWS)( univ_lsets, thr_q->locksetA ); |
| 1672 | tl_assert(nHeld >= 0); |
| 1673 | if (nHeld > 0) { |
| 1674 | HChar buf[80]; |
| 1675 | VG_(sprintf)(buf, "Exiting thread still holds %d lock%s", |
| 1676 | nHeld, nHeld > 1 ? "s" : ""); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1677 | HG_(record_error_Misc)( thr_q, buf ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1678 | } |
| 1679 | |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1680 | /* Not much to do here: |
| 1681 | - tell libhb the thread is gone |
| 1682 | - clear the map_threads entry, in order that the Valgrind core |
| 1683 | can re-use it. */ |
sewardj | 61bc2c5 | 2011-02-09 10:34:00 +0000 | [diff] [blame] | 1684 | /* Cleanup actions (next 5 lines) copied in evh__atfork_child; keep |
| 1685 | in sync. */ |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1686 | tl_assert(thr_q->hbthr); |
| 1687 | libhb_async_exit(thr_q->hbthr); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1688 | tl_assert(thr_q->coretid == quit_tid); |
| 1689 | thr_q->coretid = VG_INVALID_THREADID; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1690 | map_threads_delete( quit_tid ); |
| 1691 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1692 | if (HG_(clo_sanity_flags) & SCE_THREADS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1693 | all__sanity_check("evh__pre_thread_ll_exit-post"); |
| 1694 | } |
| 1695 | |
sewardj | 61bc2c5 | 2011-02-09 10:34:00 +0000 | [diff] [blame] | 1696 | /* This is called immediately after fork, for the child only. 'tid' |
| 1697 | is the only surviving thread (as per POSIX rules on fork() in |
| 1698 | threaded programs), so we have to clean up map_threads to remove |
| 1699 | entries for any other threads. */ |
| 1700 | static |
| 1701 | void evh__atfork_child ( ThreadId tid ) |
| 1702 | { |
| 1703 | UInt i; |
| 1704 | Thread* thr; |
| 1705 | /* Slot 0 should never be used. */ |
| 1706 | thr = map_threads_maybe_lookup( 0/*INVALID*/ ); |
| 1707 | tl_assert(!thr); |
| 1708 | /* Clean up all other slots except 'tid'. */ |
| 1709 | for (i = 1; i < VG_N_THREADS; i++) { |
| 1710 | if (i == tid) |
| 1711 | continue; |
| 1712 | thr = map_threads_maybe_lookup(i); |
| 1713 | if (!thr) |
| 1714 | continue; |
| 1715 | /* Cleanup actions (next 5 lines) copied from end of |
| 1716 | evh__pre_thread_ll_exit; keep in sync. */ |
| 1717 | tl_assert(thr->hbthr); |
| 1718 | libhb_async_exit(thr->hbthr); |
| 1719 | tl_assert(thr->coretid == i); |
| 1720 | thr->coretid = VG_INVALID_THREADID; |
| 1721 | map_threads_delete(i); |
| 1722 | } |
| 1723 | } |
| 1724 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1725 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1726 | static |
| 1727 | void evh__HG_PTHREAD_JOIN_POST ( ThreadId stay_tid, Thread* quit_thr ) |
| 1728 | { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1729 | Thread* thr_s; |
| 1730 | Thread* thr_q; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1731 | Thr* hbthr_s; |
| 1732 | Thr* hbthr_q; |
| 1733 | SO* so; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1734 | |
| 1735 | if (SHOW_EVENTS >= 1) |
| 1736 | VG_(printf)("evh__post_thread_join(stayer=%d, quitter=%p)\n", |
| 1737 | (Int)stay_tid, quit_thr ); |
| 1738 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1739 | tl_assert(HG_(is_sane_ThreadId)(stay_tid)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1740 | |
| 1741 | thr_s = map_threads_maybe_lookup( stay_tid ); |
| 1742 | thr_q = quit_thr; |
| 1743 | tl_assert(thr_s != NULL); |
| 1744 | tl_assert(thr_q != NULL); |
| 1745 | tl_assert(thr_s != thr_q); |
| 1746 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1747 | hbthr_s = thr_s->hbthr; |
| 1748 | hbthr_q = thr_q->hbthr; |
| 1749 | tl_assert(hbthr_s != hbthr_q); |
| 1750 | tl_assert( libhb_get_Thr_opaque(hbthr_s) == thr_s ); |
| 1751 | tl_assert( libhb_get_Thr_opaque(hbthr_q) == thr_q ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1752 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1753 | /* Allocate a temporary synchronisation object and use it to send |
| 1754 | an imaginary message from the quitter to the stayer, the purpose |
| 1755 | being to generate a dependence from the quitter to the |
| 1756 | stayer. */ |
| 1757 | so = libhb_so_alloc(); |
| 1758 | tl_assert(so); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1759 | /* Send last arg of _so_send as False, since the sending thread |
| 1760 | doesn't actually exist any more, so we don't want _so_send to |
| 1761 | try taking stack snapshots of it. */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1762 | libhb_so_send(hbthr_q, so, True/*strong_send*/); |
| 1763 | libhb_so_recv(hbthr_s, so, True/*strong_recv*/); |
| 1764 | libhb_so_dealloc(so); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1765 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1766 | /* evh__pre_thread_ll_exit issues an error message if the exiting |
| 1767 | thread holds any locks. No need to check here. */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1768 | |
| 1769 | /* This holds because, at least when using NPTL as the thread |
| 1770 | library, we should be notified the low level thread exit before |
| 1771 | we hear of any join event on it. The low level exit |
| 1772 | notification feeds through into evh__pre_thread_ll_exit, |
| 1773 | which should clear the map_threads entry for it. Hence we |
| 1774 | expect there to be no map_threads entry at this point. */ |
| 1775 | tl_assert( map_threads_maybe_reverse_lookup_SLOW(thr_q) |
| 1776 | == VG_INVALID_THREADID); |
| 1777 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1778 | if (HG_(clo_sanity_flags) & SCE_THREADS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1779 | all__sanity_check("evh__post_thread_join-post"); |
| 1780 | } |
| 1781 | |
| 1782 | static |
| 1783 | void evh__pre_mem_read ( CorePart part, ThreadId tid, Char* s, |
| 1784 | Addr a, SizeT size) { |
| 1785 | if (SHOW_EVENTS >= 2 |
| 1786 | || (SHOW_EVENTS >= 1 && size != 1)) |
| 1787 | VG_(printf)("evh__pre_mem_read(ctid=%d, \"%s\", %p, %lu)\n", |
| 1788 | (Int)tid, s, (void*)a, size ); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1789 | shadow_mem_cread_range( map_threads_lookup(tid), a, size); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1790 | if (size >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1791 | all__sanity_check("evh__pre_mem_read-post"); |
| 1792 | } |
| 1793 | |
| 1794 | static |
| 1795 | void evh__pre_mem_read_asciiz ( CorePart part, ThreadId tid, |
| 1796 | Char* s, Addr a ) { |
| 1797 | Int len; |
| 1798 | if (SHOW_EVENTS >= 1) |
| 1799 | VG_(printf)("evh__pre_mem_asciiz(ctid=%d, \"%s\", %p)\n", |
| 1800 | (Int)tid, s, (void*)a ); |
sewardj | 234e558 | 2011-02-09 12:47:23 +0000 | [diff] [blame^] | 1801 | // Don't segfault if the string starts in an obviously stupid |
| 1802 | // place. Actually we should check the whole string, not just |
| 1803 | // the start address, but that's too much trouble. At least |
| 1804 | // checking the first byte is better than nothing. See #255009. |
| 1805 | if (!VG_(am_is_valid_for_client) (a, 1, VKI_PROT_READ)) |
| 1806 | return; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1807 | len = VG_(strlen)( (Char*) a ); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1808 | shadow_mem_cread_range( map_threads_lookup(tid), a, len+1 ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1809 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1810 | all__sanity_check("evh__pre_mem_read_asciiz-post"); |
| 1811 | } |
| 1812 | |
| 1813 | static |
| 1814 | void evh__pre_mem_write ( CorePart part, ThreadId tid, Char* s, |
| 1815 | Addr a, SizeT size ) { |
| 1816 | if (SHOW_EVENTS >= 1) |
| 1817 | VG_(printf)("evh__pre_mem_write(ctid=%d, \"%s\", %p, %lu)\n", |
| 1818 | (Int)tid, s, (void*)a, size ); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1819 | shadow_mem_cwrite_range( map_threads_lookup(tid), a, size); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1820 | if (size >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1821 | all__sanity_check("evh__pre_mem_write-post"); |
| 1822 | } |
| 1823 | |
| 1824 | static |
| 1825 | void evh__new_mem_heap ( Addr a, SizeT len, Bool is_inited ) { |
| 1826 | if (SHOW_EVENTS >= 1) |
| 1827 | VG_(printf)("evh__new_mem_heap(%p, %lu, inited=%d)\n", |
| 1828 | (void*)a, len, (Int)is_inited ); |
| 1829 | // FIXME: this is kinda stupid |
| 1830 | if (is_inited) { |
| 1831 | shadow_mem_make_New(get_current_Thread(), a, len); |
| 1832 | } else { |
| 1833 | shadow_mem_make_New(get_current_Thread(), a, len); |
| 1834 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1835 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1836 | all__sanity_check("evh__pre_mem_read-post"); |
| 1837 | } |
| 1838 | |
| 1839 | static |
| 1840 | void evh__die_mem_heap ( Addr a, SizeT len ) { |
| 1841 | if (SHOW_EVENTS >= 1) |
| 1842 | VG_(printf)("evh__die_mem_heap(%p, %lu)\n", (void*)a, len ); |
| 1843 | shadow_mem_make_NoAccess( get_current_Thread(), a, len ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1844 | if (len >= SCE_BIGRANGE_T && (HG_(clo_sanity_flags) & SCE_BIGRANGE)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1845 | all__sanity_check("evh__pre_mem_read-post"); |
| 1846 | } |
| 1847 | |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1848 | /* --- Event handlers called from generated code --- */ |
| 1849 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1850 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1851 | void evh__mem_help_cread_1(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1852 | Thread* thr = get_current_Thread_in_C_C(); |
| 1853 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1854 | LIBHB_CREAD_1(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1855 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1856 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1857 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1858 | void evh__mem_help_cread_2(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1859 | Thread* thr = get_current_Thread_in_C_C(); |
| 1860 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1861 | LIBHB_CREAD_2(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1862 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1863 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1864 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1865 | void evh__mem_help_cread_4(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1866 | Thread* thr = get_current_Thread_in_C_C(); |
| 1867 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1868 | LIBHB_CREAD_4(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1869 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1870 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1871 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1872 | void evh__mem_help_cread_8(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1873 | Thread* thr = get_current_Thread_in_C_C(); |
| 1874 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1875 | LIBHB_CREAD_8(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1876 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1877 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1878 | static VG_REGPARM(2) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1879 | void evh__mem_help_cread_N(Addr a, SizeT size) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1880 | Thread* thr = get_current_Thread_in_C_C(); |
| 1881 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1882 | LIBHB_CREAD_N(hbthr, a, size); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1883 | } |
| 1884 | |
| 1885 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1886 | void evh__mem_help_cwrite_1(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1887 | Thread* thr = get_current_Thread_in_C_C(); |
| 1888 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1889 | LIBHB_CWRITE_1(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1890 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1891 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1892 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1893 | void evh__mem_help_cwrite_2(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1894 | Thread* thr = get_current_Thread_in_C_C(); |
| 1895 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1896 | LIBHB_CWRITE_2(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1897 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1898 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1899 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1900 | void evh__mem_help_cwrite_4(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1901 | Thread* thr = get_current_Thread_in_C_C(); |
| 1902 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1903 | LIBHB_CWRITE_4(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1904 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1905 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1906 | static VG_REGPARM(1) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1907 | void evh__mem_help_cwrite_8(Addr a) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1908 | Thread* thr = get_current_Thread_in_C_C(); |
| 1909 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1910 | LIBHB_CWRITE_8(hbthr, a); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1911 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1912 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1913 | static VG_REGPARM(2) |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1914 | void evh__mem_help_cwrite_N(Addr a, SizeT size) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1915 | Thread* thr = get_current_Thread_in_C_C(); |
| 1916 | Thr* hbthr = thr->hbthr; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 1917 | LIBHB_CWRITE_N(hbthr, a, size); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1918 | } |
| 1919 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1920 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 1921 | /* ------------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1922 | /* -------------- events to do with mutexes -------------- */ |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 1923 | /* ------------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1924 | |
| 1925 | /* EXPOSITION only: by intercepting lock init events we can show the |
| 1926 | user where the lock was initialised, rather than only being able to |
| 1927 | show where it was first locked. Intercepting lock initialisations |
| 1928 | is not necessary for the basic operation of the race checker. */ |
| 1929 | static |
| 1930 | void evh__HG_PTHREAD_MUTEX_INIT_POST( ThreadId tid, |
| 1931 | void* mutex, Word mbRec ) |
| 1932 | { |
| 1933 | if (SHOW_EVENTS >= 1) |
| 1934 | VG_(printf)("evh__hg_PTHREAD_MUTEX_INIT_POST(ctid=%d, mbRec=%ld, %p)\n", |
| 1935 | (Int)tid, mbRec, (void*)mutex ); |
| 1936 | tl_assert(mbRec == 0 || mbRec == 1); |
| 1937 | map_locks_lookup_or_create( mbRec ? LK_mbRec : LK_nonRec, |
| 1938 | (Addr)mutex, tid ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1939 | if (HG_(clo_sanity_flags) & SCE_LOCKS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1940 | all__sanity_check("evh__hg_PTHREAD_MUTEX_INIT_POST"); |
| 1941 | } |
| 1942 | |
| 1943 | static |
| 1944 | void evh__HG_PTHREAD_MUTEX_DESTROY_PRE( ThreadId tid, void* mutex ) |
| 1945 | { |
| 1946 | Thread* thr; |
| 1947 | Lock* lk; |
| 1948 | if (SHOW_EVENTS >= 1) |
| 1949 | VG_(printf)("evh__hg_PTHREAD_MUTEX_DESTROY_PRE(ctid=%d, %p)\n", |
| 1950 | (Int)tid, (void*)mutex ); |
| 1951 | |
| 1952 | thr = map_threads_maybe_lookup( tid ); |
| 1953 | /* cannot fail - Thread* must already exist */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1954 | tl_assert( HG_(is_sane_Thread)(thr) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1955 | |
| 1956 | lk = map_locks_maybe_lookup( (Addr)mutex ); |
| 1957 | |
| 1958 | if (lk == NULL || (lk->kind != LK_nonRec && lk->kind != LK_mbRec)) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1959 | HG_(record_error_Misc)( |
| 1960 | thr, "pthread_mutex_destroy with invalid argument" ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1961 | } |
| 1962 | |
| 1963 | if (lk) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1964 | tl_assert( HG_(is_sane_LockN)(lk) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1965 | tl_assert( lk->guestaddr == (Addr)mutex ); |
| 1966 | if (lk->heldBy) { |
| 1967 | /* Basically act like we unlocked the lock */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1968 | HG_(record_error_Misc)( |
| 1969 | thr, "pthread_mutex_destroy of a locked mutex" ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1970 | /* remove lock from locksets of all owning threads */ |
| 1971 | remove_Lock_from_locksets_of_all_owning_Threads( lk ); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 1972 | VG_(deleteBag)( lk->heldBy ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1973 | lk->heldBy = NULL; |
| 1974 | lk->heldW = False; |
| 1975 | lk->acquired_at = NULL; |
| 1976 | } |
| 1977 | tl_assert( !lk->heldBy ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1978 | tl_assert( HG_(is_sane_LockN)(lk) ); |
| 1979 | |
sewardj | 1cbc12f | 2008-11-10 16:16:46 +0000 | [diff] [blame] | 1980 | laog__handle_one_lock_deletion(lk); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1981 | map_locks_delete( lk->guestaddr ); |
| 1982 | del_LockN( lk ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1983 | } |
| 1984 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 1985 | if (HG_(clo_sanity_flags) & SCE_LOCKS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1986 | all__sanity_check("evh__hg_PTHREAD_MUTEX_DESTROY_PRE"); |
| 1987 | } |
| 1988 | |
| 1989 | static void evh__HG_PTHREAD_MUTEX_LOCK_PRE ( ThreadId tid, |
| 1990 | void* mutex, Word isTryLock ) |
| 1991 | { |
| 1992 | /* Just check the mutex is sane; nothing else to do. */ |
| 1993 | // 'mutex' may be invalid - not checked by wrapper |
| 1994 | Thread* thr; |
| 1995 | Lock* lk; |
| 1996 | if (SHOW_EVENTS >= 1) |
| 1997 | VG_(printf)("evh__hg_PTHREAD_MUTEX_LOCK_PRE(ctid=%d, mutex=%p)\n", |
| 1998 | (Int)tid, (void*)mutex ); |
| 1999 | |
| 2000 | tl_assert(isTryLock == 0 || isTryLock == 1); |
| 2001 | thr = map_threads_maybe_lookup( tid ); |
| 2002 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2003 | |
| 2004 | lk = map_locks_maybe_lookup( (Addr)mutex ); |
| 2005 | |
| 2006 | if (lk && (lk->kind == LK_rdwr)) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2007 | HG_(record_error_Misc)( thr, "pthread_mutex_lock with a " |
| 2008 | "pthread_rwlock_t* argument " ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2009 | } |
| 2010 | |
| 2011 | if ( lk |
| 2012 | && isTryLock == 0 |
| 2013 | && (lk->kind == LK_nonRec || lk->kind == LK_rdwr) |
| 2014 | && lk->heldBy |
| 2015 | && lk->heldW |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 2016 | && VG_(elemBag)( lk->heldBy, (Word)thr ) > 0 ) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2017 | /* uh, it's a non-recursive lock and we already w-hold it, and |
| 2018 | this is a real lock operation (not a speculative "tryLock" |
| 2019 | kind of thing). Duh. Deadlock coming up; but at least |
| 2020 | produce an error message. */ |
sewardj | 8fef625 | 2010-07-29 05:28:02 +0000 | [diff] [blame] | 2021 | HChar* errstr = "Attempt to re-lock a " |
| 2022 | "non-recursive lock I already hold"; |
| 2023 | HChar* auxstr = "Lock was previously acquired"; |
| 2024 | if (lk->acquired_at) { |
| 2025 | HG_(record_error_Misc_w_aux)( thr, errstr, auxstr, lk->acquired_at ); |
| 2026 | } else { |
| 2027 | HG_(record_error_Misc)( thr, errstr ); |
| 2028 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2029 | } |
| 2030 | } |
| 2031 | |
| 2032 | static void evh__HG_PTHREAD_MUTEX_LOCK_POST ( ThreadId tid, void* mutex ) |
| 2033 | { |
| 2034 | // only called if the real library call succeeded - so mutex is sane |
| 2035 | Thread* thr; |
| 2036 | if (SHOW_EVENTS >= 1) |
| 2037 | VG_(printf)("evh__HG_PTHREAD_MUTEX_LOCK_POST(ctid=%d, mutex=%p)\n", |
| 2038 | (Int)tid, (void*)mutex ); |
| 2039 | |
| 2040 | thr = map_threads_maybe_lookup( tid ); |
| 2041 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2042 | |
| 2043 | evhH__post_thread_w_acquires_lock( |
| 2044 | thr, |
| 2045 | LK_mbRec, /* if not known, create new lock with this LockKind */ |
| 2046 | (Addr)mutex |
| 2047 | ); |
| 2048 | } |
| 2049 | |
| 2050 | static void evh__HG_PTHREAD_MUTEX_UNLOCK_PRE ( ThreadId tid, void* mutex ) |
| 2051 | { |
| 2052 | // 'mutex' may be invalid - not checked by wrapper |
| 2053 | Thread* thr; |
| 2054 | if (SHOW_EVENTS >= 1) |
| 2055 | VG_(printf)("evh__HG_PTHREAD_MUTEX_UNLOCK_PRE(ctid=%d, mutex=%p)\n", |
| 2056 | (Int)tid, (void*)mutex ); |
| 2057 | |
| 2058 | thr = map_threads_maybe_lookup( tid ); |
| 2059 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2060 | |
| 2061 | evhH__pre_thread_releases_lock( thr, (Addr)mutex, False/*!isRDWR*/ ); |
| 2062 | } |
| 2063 | |
| 2064 | static void evh__HG_PTHREAD_MUTEX_UNLOCK_POST ( ThreadId tid, void* mutex ) |
| 2065 | { |
| 2066 | // only called if the real library call succeeded - so mutex is sane |
| 2067 | Thread* thr; |
| 2068 | if (SHOW_EVENTS >= 1) |
| 2069 | VG_(printf)("evh__hg_PTHREAD_MUTEX_UNLOCK_POST(ctid=%d, mutex=%p)\n", |
| 2070 | (Int)tid, (void*)mutex ); |
| 2071 | thr = map_threads_maybe_lookup( tid ); |
| 2072 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2073 | |
| 2074 | // anything we should do here? |
| 2075 | } |
| 2076 | |
| 2077 | |
sewardj | 5a644da | 2009-08-11 10:35:58 +0000 | [diff] [blame] | 2078 | /* ------------------------------------------------------- */ |
sewardj | 1f77fec | 2010-04-12 19:51:04 +0000 | [diff] [blame] | 2079 | /* -------------- events to do with spinlocks ------------ */ |
sewardj | 5a644da | 2009-08-11 10:35:58 +0000 | [diff] [blame] | 2080 | /* ------------------------------------------------------- */ |
| 2081 | |
| 2082 | /* All a bit of a kludge. Pretend we're really dealing with ordinary |
| 2083 | pthread_mutex_t's instead, for the most part. */ |
| 2084 | |
| 2085 | static void evh__HG_PTHREAD_SPIN_INIT_OR_UNLOCK_PRE( ThreadId tid, |
| 2086 | void* slock ) |
| 2087 | { |
| 2088 | Thread* thr; |
| 2089 | Lock* lk; |
| 2090 | /* In glibc's kludgey world, we're either initialising or unlocking |
| 2091 | it. Since this is the pre-routine, if it is locked, unlock it |
| 2092 | and take a dependence edge. Otherwise, do nothing. */ |
| 2093 | |
| 2094 | if (SHOW_EVENTS >= 1) |
| 2095 | VG_(printf)("evh__hg_PTHREAD_SPIN_INIT_OR_UNLOCK_PRE" |
| 2096 | "(ctid=%d, slock=%p)\n", |
| 2097 | (Int)tid, (void*)slock ); |
| 2098 | |
| 2099 | thr = map_threads_maybe_lookup( tid ); |
| 2100 | /* cannot fail - Thread* must already exist */; |
| 2101 | tl_assert( HG_(is_sane_Thread)(thr) ); |
| 2102 | |
| 2103 | lk = map_locks_maybe_lookup( (Addr)slock ); |
| 2104 | if (lk && lk->heldBy) { |
| 2105 | /* it's held. So do the normal pre-unlock actions, as copied |
| 2106 | from evh__HG_PTHREAD_MUTEX_UNLOCK_PRE. This stupidly |
| 2107 | duplicates the map_locks_maybe_lookup. */ |
| 2108 | evhH__pre_thread_releases_lock( thr, (Addr)slock, |
| 2109 | False/*!isRDWR*/ ); |
| 2110 | } |
| 2111 | } |
| 2112 | |
| 2113 | static void evh__HG_PTHREAD_SPIN_INIT_OR_UNLOCK_POST( ThreadId tid, |
| 2114 | void* slock ) |
| 2115 | { |
| 2116 | Lock* lk; |
| 2117 | /* More kludgery. If the lock has never been seen before, do |
| 2118 | actions as per evh__HG_PTHREAD_MUTEX_INIT_POST. Else do |
| 2119 | nothing. */ |
| 2120 | |
| 2121 | if (SHOW_EVENTS >= 1) |
| 2122 | VG_(printf)("evh__hg_PTHREAD_SPIN_INIT_OR_UNLOCK_POST" |
| 2123 | "(ctid=%d, slock=%p)\n", |
| 2124 | (Int)tid, (void*)slock ); |
| 2125 | |
| 2126 | lk = map_locks_maybe_lookup( (Addr)slock ); |
| 2127 | if (!lk) { |
| 2128 | map_locks_lookup_or_create( LK_nonRec, (Addr)slock, tid ); |
| 2129 | } |
| 2130 | } |
| 2131 | |
| 2132 | static void evh__HG_PTHREAD_SPIN_LOCK_PRE( ThreadId tid, |
| 2133 | void* slock, Word isTryLock ) |
| 2134 | { |
| 2135 | evh__HG_PTHREAD_MUTEX_LOCK_PRE( tid, slock, isTryLock ); |
| 2136 | } |
| 2137 | |
| 2138 | static void evh__HG_PTHREAD_SPIN_LOCK_POST( ThreadId tid, |
| 2139 | void* slock ) |
| 2140 | { |
| 2141 | evh__HG_PTHREAD_MUTEX_LOCK_POST( tid, slock ); |
| 2142 | } |
| 2143 | |
| 2144 | static void evh__HG_PTHREAD_SPIN_DESTROY_PRE( ThreadId tid, |
| 2145 | void* slock ) |
| 2146 | { |
| 2147 | evh__HG_PTHREAD_MUTEX_DESTROY_PRE( tid, slock ); |
| 2148 | } |
| 2149 | |
| 2150 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2151 | /* ----------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2152 | /* --------------- events to do with CVs --------------- */ |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2153 | /* ----------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2154 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2155 | /* A mapping from CV to (the SO associated with it, plus some |
| 2156 | auxiliary data for error checking). When the CV is |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2157 | signalled/broadcasted upon, we do a 'send' into the SO, and when a |
| 2158 | wait on it completes, we do a 'recv' from the SO. This is believed |
| 2159 | to give the correct happens-before events arising from CV |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2160 | signallings/broadcasts. |
| 2161 | */ |
| 2162 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2163 | /* .so is the SO for this CV. |
| 2164 | .mx_ga is the associated mutex, when .nWaiters > 0 |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2165 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2166 | POSIX says effectively that the first pthread_cond_{timed}wait call |
| 2167 | causes a dynamic binding between the CV and the mutex, and that |
| 2168 | lasts until such time as the waiter count falls to zero. Hence |
| 2169 | need to keep track of the number of waiters in order to do |
| 2170 | consistency tracking. */ |
| 2171 | typedef |
| 2172 | struct { |
| 2173 | SO* so; /* libhb-allocated SO */ |
| 2174 | void* mx_ga; /* addr of associated mutex, if any */ |
| 2175 | UWord nWaiters; /* # threads waiting on the CV */ |
| 2176 | } |
| 2177 | CVInfo; |
| 2178 | |
| 2179 | |
| 2180 | /* pthread_cond_t* -> CVInfo* */ |
| 2181 | static WordFM* map_cond_to_CVInfo = NULL; |
| 2182 | |
| 2183 | static void map_cond_to_CVInfo_INIT ( void ) { |
| 2184 | if (UNLIKELY(map_cond_to_CVInfo == NULL)) { |
| 2185 | map_cond_to_CVInfo = VG_(newFM)( HG_(zalloc), |
| 2186 | "hg.mctCI.1", HG_(free), NULL ); |
| 2187 | tl_assert(map_cond_to_CVInfo != NULL); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2188 | } |
| 2189 | } |
| 2190 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2191 | static CVInfo* map_cond_to_CVInfo_lookup_or_alloc ( void* cond ) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2192 | UWord key, val; |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2193 | map_cond_to_CVInfo_INIT(); |
| 2194 | if (VG_(lookupFM)( map_cond_to_CVInfo, &key, &val, (UWord)cond )) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2195 | tl_assert(key == (UWord)cond); |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2196 | return (CVInfo*)val; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2197 | } else { |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2198 | SO* so = libhb_so_alloc(); |
| 2199 | CVInfo* cvi = HG_(zalloc)("hg.mctCloa.1", sizeof(CVInfo)); |
| 2200 | cvi->so = so; |
| 2201 | cvi->mx_ga = 0; |
| 2202 | VG_(addToFM)( map_cond_to_CVInfo, (UWord)cond, (UWord)cvi ); |
| 2203 | return cvi; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2204 | } |
| 2205 | } |
| 2206 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2207 | static void map_cond_to_CVInfo_delete ( void* cond ) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2208 | UWord keyW, valW; |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2209 | map_cond_to_CVInfo_INIT(); |
| 2210 | if (VG_(delFromFM)( map_cond_to_CVInfo, &keyW, &valW, (UWord)cond )) { |
| 2211 | CVInfo* cvi = (CVInfo*)valW; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2212 | tl_assert(keyW == (UWord)cond); |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2213 | tl_assert(cvi); |
| 2214 | tl_assert(cvi->so); |
| 2215 | libhb_so_dealloc(cvi->so); |
| 2216 | cvi->mx_ga = 0; |
| 2217 | HG_(free)(cvi); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2218 | } |
| 2219 | } |
| 2220 | |
| 2221 | static void evh__HG_PTHREAD_COND_SIGNAL_PRE ( ThreadId tid, void* cond ) |
| 2222 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2223 | /* 'tid' has signalled on 'cond'. As per the comment above, bind |
| 2224 | cond to a SO if it is not already so bound, and 'send' on the |
| 2225 | SO. This is later used by other thread(s) which successfully |
| 2226 | exit from a pthread_cond_wait on the same cv; then they 'recv' |
| 2227 | from the SO, thereby acquiring a dependency on this signalling |
| 2228 | event. */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2229 | Thread* thr; |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2230 | CVInfo* cvi; |
| 2231 | //Lock* lk; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2232 | |
| 2233 | if (SHOW_EVENTS >= 1) |
| 2234 | VG_(printf)("evh__HG_PTHREAD_COND_SIGNAL_PRE(ctid=%d, cond=%p)\n", |
| 2235 | (Int)tid, (void*)cond ); |
| 2236 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2237 | thr = map_threads_maybe_lookup( tid ); |
| 2238 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2239 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2240 | cvi = map_cond_to_CVInfo_lookup_or_alloc( cond ); |
| 2241 | tl_assert(cvi); |
| 2242 | tl_assert(cvi->so); |
| 2243 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2244 | // error-if: mutex is bogus |
| 2245 | // error-if: mutex is not locked |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2246 | // Hmm. POSIX doesn't actually say that it's an error to call |
| 2247 | // pthread_cond_signal with the associated mutex being unlocked. |
| 2248 | // Although it does say that it should be "if consistent scheduling |
| 2249 | // is desired." |
| 2250 | // |
| 2251 | // For the moment, disable these checks. |
| 2252 | //lk = map_locks_maybe_lookup(cvi->mx_ga); |
| 2253 | //if (lk == NULL || cvi->mx_ga == 0) { |
| 2254 | // HG_(record_error_Misc)( thr, |
| 2255 | // "pthread_cond_{signal,broadcast}: " |
| 2256 | // "no or invalid mutex associated with cond"); |
| 2257 | //} |
| 2258 | ///* note: lk could be NULL. Be careful. */ |
| 2259 | //if (lk) { |
| 2260 | // if (lk->kind == LK_rdwr) { |
| 2261 | // HG_(record_error_Misc)(thr, |
| 2262 | // "pthread_cond_{signal,broadcast}: associated lock is a rwlock"); |
| 2263 | // } |
| 2264 | // if (lk->heldBy == NULL) { |
| 2265 | // HG_(record_error_Misc)(thr, |
| 2266 | // "pthread_cond_{signal,broadcast}: " |
| 2267 | // "associated lock is not held by any thread"); |
| 2268 | // } |
| 2269 | // if (lk->heldBy != NULL && 0 == VG_(elemBag)(lk->heldBy, (Word)thr)) { |
| 2270 | // HG_(record_error_Misc)(thr, |
| 2271 | // "pthread_cond_{signal,broadcast}: " |
| 2272 | // "associated lock is not held by calling thread"); |
| 2273 | // } |
| 2274 | //} |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2275 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2276 | libhb_so_send( thr->hbthr, cvi->so, True/*strong_send*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2277 | } |
| 2278 | |
| 2279 | /* returns True if it reckons 'mutex' is valid and held by this |
| 2280 | thread, else False */ |
| 2281 | static Bool evh__HG_PTHREAD_COND_WAIT_PRE ( ThreadId tid, |
| 2282 | void* cond, void* mutex ) |
| 2283 | { |
| 2284 | Thread* thr; |
| 2285 | Lock* lk; |
| 2286 | Bool lk_valid = True; |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2287 | CVInfo* cvi; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2288 | |
| 2289 | if (SHOW_EVENTS >= 1) |
| 2290 | VG_(printf)("evh__hg_PTHREAD_COND_WAIT_PRE" |
| 2291 | "(ctid=%d, cond=%p, mutex=%p)\n", |
| 2292 | (Int)tid, (void*)cond, (void*)mutex ); |
| 2293 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2294 | thr = map_threads_maybe_lookup( tid ); |
| 2295 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2296 | |
| 2297 | lk = map_locks_maybe_lookup( (Addr)mutex ); |
| 2298 | |
| 2299 | /* Check for stupid mutex arguments. There are various ways to be |
| 2300 | a bozo. Only complain once, though, even if more than one thing |
| 2301 | is wrong. */ |
| 2302 | if (lk == NULL) { |
| 2303 | lk_valid = False; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2304 | HG_(record_error_Misc)( |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2305 | thr, |
| 2306 | "pthread_cond_{timed}wait called with invalid mutex" ); |
| 2307 | } else { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2308 | tl_assert( HG_(is_sane_LockN)(lk) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2309 | if (lk->kind == LK_rdwr) { |
| 2310 | lk_valid = False; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2311 | HG_(record_error_Misc)( |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2312 | thr, "pthread_cond_{timed}wait called with mutex " |
| 2313 | "of type pthread_rwlock_t*" ); |
| 2314 | } else |
| 2315 | if (lk->heldBy == NULL) { |
| 2316 | lk_valid = False; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2317 | HG_(record_error_Misc)( |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2318 | thr, "pthread_cond_{timed}wait called with un-held mutex"); |
| 2319 | } else |
| 2320 | if (lk->heldBy != NULL |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 2321 | && VG_(elemBag)( lk->heldBy, (Word)thr ) == 0) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2322 | lk_valid = False; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2323 | HG_(record_error_Misc)( |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2324 | thr, "pthread_cond_{timed}wait called with mutex " |
| 2325 | "held by a different thread" ); |
| 2326 | } |
| 2327 | } |
| 2328 | |
| 2329 | // error-if: cond is also associated with a different mutex |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2330 | cvi = map_cond_to_CVInfo_lookup_or_alloc(cond); |
| 2331 | tl_assert(cvi); |
| 2332 | tl_assert(cvi->so); |
| 2333 | if (cvi->nWaiters == 0) { |
| 2334 | /* form initial (CV,MX) binding */ |
| 2335 | cvi->mx_ga = mutex; |
| 2336 | } |
| 2337 | else /* check existing (CV,MX) binding */ |
| 2338 | if (cvi->mx_ga != mutex) { |
| 2339 | HG_(record_error_Misc)( |
| 2340 | thr, "pthread_cond_{timed}wait: cond is associated " |
| 2341 | "with a different mutex"); |
| 2342 | } |
| 2343 | cvi->nWaiters++; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2344 | |
| 2345 | return lk_valid; |
| 2346 | } |
| 2347 | |
| 2348 | static void evh__HG_PTHREAD_COND_WAIT_POST ( ThreadId tid, |
| 2349 | void* cond, void* mutex ) |
| 2350 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2351 | /* A pthread_cond_wait(cond, mutex) completed successfully. Find |
| 2352 | the SO for this cond, and 'recv' from it so as to acquire a |
| 2353 | dependency edge back to the signaller/broadcaster. */ |
| 2354 | Thread* thr; |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2355 | CVInfo* cvi; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2356 | |
| 2357 | if (SHOW_EVENTS >= 1) |
| 2358 | VG_(printf)("evh__HG_PTHREAD_COND_WAIT_POST" |
| 2359 | "(ctid=%d, cond=%p, mutex=%p)\n", |
| 2360 | (Int)tid, (void*)cond, (void*)mutex ); |
| 2361 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2362 | thr = map_threads_maybe_lookup( tid ); |
| 2363 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2364 | |
| 2365 | // error-if: cond is also associated with a different mutex |
| 2366 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2367 | cvi = map_cond_to_CVInfo_lookup_or_alloc( cond ); |
| 2368 | tl_assert(cvi); |
| 2369 | tl_assert(cvi->so); |
| 2370 | tl_assert(cvi->nWaiters > 0); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2371 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2372 | if (!libhb_so_everSent(cvi->so)) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2373 | /* Hmm. How can a wait on 'cond' succeed if nobody signalled |
| 2374 | it? If this happened it would surely be a bug in the threads |
| 2375 | library. Or one of those fabled "spurious wakeups". */ |
| 2376 | HG_(record_error_Misc)( thr, "Bug in libpthread: pthread_cond_wait " |
| 2377 | "succeeded on" |
| 2378 | " without prior pthread_cond_post"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2379 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2380 | |
| 2381 | /* anyway, acquire a dependency on it. */ |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2382 | libhb_so_recv( thr->hbthr, cvi->so, True/*strong_recv*/ ); |
| 2383 | |
| 2384 | cvi->nWaiters--; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2385 | } |
| 2386 | |
| 2387 | static void evh__HG_PTHREAD_COND_DESTROY_PRE ( ThreadId tid, |
| 2388 | void* cond ) |
| 2389 | { |
| 2390 | /* Deal with destroy events. The only purpose is to free storage |
| 2391 | associated with the CV, so as to avoid any possible resource |
| 2392 | leaks. */ |
| 2393 | if (SHOW_EVENTS >= 1) |
| 2394 | VG_(printf)("evh__HG_PTHREAD_COND_DESTROY_PRE" |
| 2395 | "(ctid=%d, cond=%p)\n", |
| 2396 | (Int)tid, (void*)cond ); |
| 2397 | |
sewardj | 0211454 | 2009-07-28 20:52:36 +0000 | [diff] [blame] | 2398 | map_cond_to_CVInfo_delete( cond ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2399 | } |
| 2400 | |
| 2401 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2402 | /* ------------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2403 | /* -------------- events to do with rwlocks -------------- */ |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2404 | /* ------------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2405 | |
| 2406 | /* EXPOSITION only */ |
| 2407 | static |
| 2408 | void evh__HG_PTHREAD_RWLOCK_INIT_POST( ThreadId tid, void* rwl ) |
| 2409 | { |
| 2410 | if (SHOW_EVENTS >= 1) |
| 2411 | VG_(printf)("evh__hg_PTHREAD_RWLOCK_INIT_POST(ctid=%d, %p)\n", |
| 2412 | (Int)tid, (void*)rwl ); |
| 2413 | map_locks_lookup_or_create( LK_rdwr, (Addr)rwl, tid ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2414 | if (HG_(clo_sanity_flags) & SCE_LOCKS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2415 | all__sanity_check("evh__hg_PTHREAD_RWLOCK_INIT_POST"); |
| 2416 | } |
| 2417 | |
| 2418 | static |
| 2419 | void evh__HG_PTHREAD_RWLOCK_DESTROY_PRE( ThreadId tid, void* rwl ) |
| 2420 | { |
| 2421 | Thread* thr; |
| 2422 | Lock* lk; |
| 2423 | if (SHOW_EVENTS >= 1) |
| 2424 | VG_(printf)("evh__hg_PTHREAD_RWLOCK_DESTROY_PRE(ctid=%d, %p)\n", |
| 2425 | (Int)tid, (void*)rwl ); |
| 2426 | |
| 2427 | thr = map_threads_maybe_lookup( tid ); |
| 2428 | /* cannot fail - Thread* must already exist */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2429 | tl_assert( HG_(is_sane_Thread)(thr) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2430 | |
| 2431 | lk = map_locks_maybe_lookup( (Addr)rwl ); |
| 2432 | |
| 2433 | if (lk == NULL || lk->kind != LK_rdwr) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2434 | HG_(record_error_Misc)( |
| 2435 | thr, "pthread_rwlock_destroy with invalid argument" ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2436 | } |
| 2437 | |
| 2438 | if (lk) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2439 | tl_assert( HG_(is_sane_LockN)(lk) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2440 | tl_assert( lk->guestaddr == (Addr)rwl ); |
| 2441 | if (lk->heldBy) { |
| 2442 | /* Basically act like we unlocked the lock */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2443 | HG_(record_error_Misc)( |
| 2444 | thr, "pthread_rwlock_destroy of a locked mutex" ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2445 | /* remove lock from locksets of all owning threads */ |
| 2446 | remove_Lock_from_locksets_of_all_owning_Threads( lk ); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 2447 | VG_(deleteBag)( lk->heldBy ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2448 | lk->heldBy = NULL; |
| 2449 | lk->heldW = False; |
sewardj | 1c7e833 | 2007-11-29 13:04:03 +0000 | [diff] [blame] | 2450 | lk->acquired_at = NULL; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2451 | } |
| 2452 | tl_assert( !lk->heldBy ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2453 | tl_assert( HG_(is_sane_LockN)(lk) ); |
| 2454 | |
sewardj | 1cbc12f | 2008-11-10 16:16:46 +0000 | [diff] [blame] | 2455 | laog__handle_one_lock_deletion(lk); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2456 | map_locks_delete( lk->guestaddr ); |
| 2457 | del_LockN( lk ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2458 | } |
| 2459 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2460 | if (HG_(clo_sanity_flags) & SCE_LOCKS) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2461 | all__sanity_check("evh__hg_PTHREAD_RWLOCK_DESTROY_PRE"); |
| 2462 | } |
| 2463 | |
| 2464 | static |
sewardj | 789c3c5 | 2008-02-25 12:10:07 +0000 | [diff] [blame] | 2465 | void evh__HG_PTHREAD_RWLOCK_LOCK_PRE ( ThreadId tid, |
| 2466 | void* rwl, |
| 2467 | Word isW, Word isTryLock ) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2468 | { |
| 2469 | /* Just check the rwl is sane; nothing else to do. */ |
| 2470 | // 'rwl' may be invalid - not checked by wrapper |
| 2471 | Thread* thr; |
| 2472 | Lock* lk; |
| 2473 | if (SHOW_EVENTS >= 1) |
| 2474 | VG_(printf)("evh__hg_PTHREAD_RWLOCK_LOCK_PRE(ctid=%d, isW=%d, %p)\n", |
| 2475 | (Int)tid, (Int)isW, (void*)rwl ); |
| 2476 | |
| 2477 | tl_assert(isW == 0 || isW == 1); /* assured us by wrapper */ |
sewardj | 789c3c5 | 2008-02-25 12:10:07 +0000 | [diff] [blame] | 2478 | tl_assert(isTryLock == 0 || isTryLock == 1); /* assured us by wrapper */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2479 | thr = map_threads_maybe_lookup( tid ); |
| 2480 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2481 | |
| 2482 | lk = map_locks_maybe_lookup( (Addr)rwl ); |
| 2483 | if ( lk |
| 2484 | && (lk->kind == LK_nonRec || lk->kind == LK_mbRec) ) { |
| 2485 | /* Wrong kind of lock. Duh. */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2486 | HG_(record_error_Misc)( |
| 2487 | thr, "pthread_rwlock_{rd,rw}lock with a " |
| 2488 | "pthread_mutex_t* argument " ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2489 | } |
| 2490 | } |
| 2491 | |
| 2492 | static |
| 2493 | void evh__HG_PTHREAD_RWLOCK_LOCK_POST ( ThreadId tid, void* rwl, Word isW ) |
| 2494 | { |
| 2495 | // only called if the real library call succeeded - so mutex is sane |
| 2496 | Thread* thr; |
| 2497 | if (SHOW_EVENTS >= 1) |
| 2498 | VG_(printf)("evh__hg_PTHREAD_RWLOCK_LOCK_POST(ctid=%d, isW=%d, %p)\n", |
| 2499 | (Int)tid, (Int)isW, (void*)rwl ); |
| 2500 | |
| 2501 | tl_assert(isW == 0 || isW == 1); /* assured us by wrapper */ |
| 2502 | thr = map_threads_maybe_lookup( tid ); |
| 2503 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2504 | |
| 2505 | (isW ? evhH__post_thread_w_acquires_lock |
| 2506 | : evhH__post_thread_r_acquires_lock)( |
| 2507 | thr, |
| 2508 | LK_rdwr, /* if not known, create new lock with this LockKind */ |
| 2509 | (Addr)rwl |
| 2510 | ); |
| 2511 | } |
| 2512 | |
| 2513 | static void evh__HG_PTHREAD_RWLOCK_UNLOCK_PRE ( ThreadId tid, void* rwl ) |
| 2514 | { |
| 2515 | // 'rwl' may be invalid - not checked by wrapper |
| 2516 | Thread* thr; |
| 2517 | if (SHOW_EVENTS >= 1) |
| 2518 | VG_(printf)("evh__HG_PTHREAD_RWLOCK_UNLOCK_PRE(ctid=%d, rwl=%p)\n", |
| 2519 | (Int)tid, (void*)rwl ); |
| 2520 | |
| 2521 | thr = map_threads_maybe_lookup( tid ); |
| 2522 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2523 | |
| 2524 | evhH__pre_thread_releases_lock( thr, (Addr)rwl, True/*isRDWR*/ ); |
| 2525 | } |
| 2526 | |
| 2527 | static void evh__HG_PTHREAD_RWLOCK_UNLOCK_POST ( ThreadId tid, void* rwl ) |
| 2528 | { |
| 2529 | // only called if the real library call succeeded - so mutex is sane |
| 2530 | Thread* thr; |
| 2531 | if (SHOW_EVENTS >= 1) |
| 2532 | VG_(printf)("evh__hg_PTHREAD_RWLOCK_UNLOCK_POST(ctid=%d, rwl=%p)\n", |
| 2533 | (Int)tid, (void*)rwl ); |
| 2534 | thr = map_threads_maybe_lookup( tid ); |
| 2535 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2536 | |
| 2537 | // anything we should do here? |
| 2538 | } |
| 2539 | |
| 2540 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2541 | /* ---------------------------------------------------------- */ |
| 2542 | /* -------------- events to do with semaphores -------------- */ |
| 2543 | /* ---------------------------------------------------------- */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2544 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2545 | /* This is similar to but not identical to the handling for condition |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2546 | variables. */ |
| 2547 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2548 | /* For each semaphore, we maintain a stack of SOs. When a 'post' |
| 2549 | operation is done on a semaphore (unlocking, essentially), a new SO |
| 2550 | is created for the posting thread, the posting thread does a strong |
| 2551 | send to it (which merely installs the posting thread's VC in the |
| 2552 | SO), and the SO is pushed on the semaphore's stack. |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2553 | |
| 2554 | Later, when a (probably different) thread completes 'wait' on the |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2555 | semaphore, we pop a SO off the semaphore's stack (which should be |
| 2556 | nonempty), and do a strong recv from it. This mechanism creates |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2557 | dependencies between posters and waiters of the semaphore. |
| 2558 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2559 | It may not be necessary to use a stack - perhaps a bag of SOs would |
| 2560 | do. But we do need to keep track of how many unused-up posts have |
| 2561 | happened for the semaphore. |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2562 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2563 | Imagine T1 and T2 both post once on a semaphore S, and T3 waits |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2564 | twice on S. T3 cannot complete its waits without both T1 and T2 |
| 2565 | posting. The above mechanism will ensure that T3 acquires |
| 2566 | dependencies on both T1 and T2. |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2567 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2568 | When a semaphore is initialised with value N, we do as if we'd |
| 2569 | posted N times on the semaphore: basically create N SOs and do a |
| 2570 | strong send to all of then. This allows up to N waits on the |
| 2571 | semaphore to acquire a dependency on the initialisation point, |
| 2572 | which AFAICS is the correct behaviour. |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2573 | |
| 2574 | We don't emit an error for DESTROY_PRE on a semaphore we don't know |
| 2575 | about. We should. |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2576 | */ |
| 2577 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2578 | /* sem_t* -> XArray* SO* */ |
| 2579 | static WordFM* map_sem_to_SO_stack = NULL; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2580 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2581 | static void map_sem_to_SO_stack_INIT ( void ) { |
| 2582 | if (map_sem_to_SO_stack == NULL) { |
| 2583 | map_sem_to_SO_stack = VG_(newFM)( HG_(zalloc), "hg.mstSs.1", |
| 2584 | HG_(free), NULL ); |
| 2585 | tl_assert(map_sem_to_SO_stack != NULL); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2586 | } |
| 2587 | } |
| 2588 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2589 | static void push_SO_for_sem ( void* sem, SO* so ) { |
| 2590 | UWord keyW; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2591 | XArray* xa; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2592 | tl_assert(so); |
| 2593 | map_sem_to_SO_stack_INIT(); |
| 2594 | if (VG_(lookupFM)( map_sem_to_SO_stack, |
| 2595 | &keyW, (UWord*)&xa, (UWord)sem )) { |
| 2596 | tl_assert(keyW == (UWord)sem); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2597 | tl_assert(xa); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2598 | VG_(addToXA)( xa, &so ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2599 | } else { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2600 | xa = VG_(newXA)( HG_(zalloc), "hg.pSfs.1", HG_(free), sizeof(SO*) ); |
| 2601 | VG_(addToXA)( xa, &so ); |
| 2602 | VG_(addToFM)( map_sem_to_SO_stack, (Word)sem, (Word)xa ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2603 | } |
| 2604 | } |
| 2605 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2606 | static SO* mb_pop_SO_for_sem ( void* sem ) { |
| 2607 | UWord keyW; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2608 | XArray* xa; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2609 | SO* so; |
| 2610 | map_sem_to_SO_stack_INIT(); |
| 2611 | if (VG_(lookupFM)( map_sem_to_SO_stack, |
| 2612 | &keyW, (UWord*)&xa, (UWord)sem )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2613 | /* xa is the stack for this semaphore. */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2614 | Word sz; |
| 2615 | tl_assert(keyW == (UWord)sem); |
| 2616 | sz = VG_(sizeXA)( xa ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2617 | tl_assert(sz >= 0); |
| 2618 | if (sz == 0) |
| 2619 | return NULL; /* odd, the stack is empty */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2620 | so = *(SO**)VG_(indexXA)( xa, sz-1 ); |
| 2621 | tl_assert(so); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2622 | VG_(dropTailXA)( xa, 1 ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2623 | return so; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2624 | } else { |
| 2625 | /* hmm, that's odd. No stack for this semaphore. */ |
| 2626 | return NULL; |
| 2627 | } |
| 2628 | } |
| 2629 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2630 | static void evh__HG_POSIX_SEM_DESTROY_PRE ( ThreadId tid, void* sem ) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2631 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2632 | UWord keyW, valW; |
| 2633 | SO* so; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2634 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2635 | if (SHOW_EVENTS >= 1) |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2636 | VG_(printf)("evh__HG_POSIX_SEM_DESTROY_PRE(ctid=%d, sem=%p)\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2637 | (Int)tid, (void*)sem ); |
| 2638 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2639 | map_sem_to_SO_stack_INIT(); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2640 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2641 | /* Empty out the semaphore's SO stack. This way of doing it is |
| 2642 | stupid, but at least it's easy. */ |
| 2643 | while (1) { |
| 2644 | so = mb_pop_SO_for_sem( sem ); |
| 2645 | if (!so) break; |
| 2646 | libhb_so_dealloc(so); |
| 2647 | } |
| 2648 | |
| 2649 | if (VG_(delFromFM)( map_sem_to_SO_stack, &keyW, &valW, (UWord)sem )) { |
| 2650 | XArray* xa = (XArray*)valW; |
| 2651 | tl_assert(keyW == (UWord)sem); |
| 2652 | tl_assert(xa); |
| 2653 | tl_assert(VG_(sizeXA)(xa) == 0); /* preceding loop just emptied it */ |
| 2654 | VG_(deleteXA)(xa); |
| 2655 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2656 | } |
| 2657 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2658 | static |
| 2659 | void evh__HG_POSIX_SEM_INIT_POST ( ThreadId tid, void* sem, UWord value ) |
| 2660 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2661 | SO* so; |
| 2662 | Thread* thr; |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2663 | |
| 2664 | if (SHOW_EVENTS >= 1) |
| 2665 | VG_(printf)("evh__HG_POSIX_SEM_INIT_POST(ctid=%d, sem=%p, value=%lu)\n", |
| 2666 | (Int)tid, (void*)sem, value ); |
| 2667 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2668 | thr = map_threads_maybe_lookup( tid ); |
| 2669 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2670 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2671 | /* Empty out the semaphore's SO stack. This way of doing it is |
| 2672 | stupid, but at least it's easy. */ |
| 2673 | while (1) { |
| 2674 | so = mb_pop_SO_for_sem( sem ); |
| 2675 | if (!so) break; |
| 2676 | libhb_so_dealloc(so); |
| 2677 | } |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2678 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2679 | /* If we don't do this check, the following while loop runs us out |
| 2680 | of memory for stupid initial values of 'value'. */ |
| 2681 | if (value > 10000) { |
| 2682 | HG_(record_error_Misc)( |
| 2683 | thr, "sem_init: initial value exceeds 10000; using 10000" ); |
| 2684 | value = 10000; |
| 2685 | } |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2686 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2687 | /* Now create 'valid' new SOs for the thread, do a strong send to |
| 2688 | each of them, and push them all on the stack. */ |
| 2689 | for (; value > 0; value--) { |
| 2690 | Thr* hbthr = thr->hbthr; |
| 2691 | tl_assert(hbthr); |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2692 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2693 | so = libhb_so_alloc(); |
| 2694 | libhb_so_send( hbthr, so, True/*strong send*/ ); |
| 2695 | push_SO_for_sem( sem, so ); |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2696 | } |
| 2697 | } |
| 2698 | |
| 2699 | static void evh__HG_POSIX_SEM_POST_PRE ( ThreadId tid, void* sem ) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2700 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2701 | /* 'tid' has posted on 'sem'. Create a new SO, do a strong send to |
| 2702 | it (iow, write our VC into it, then tick ours), and push the SO |
| 2703 | on on a stack of SOs associated with 'sem'. This is later used |
| 2704 | by other thread(s) which successfully exit from a sem_wait on |
| 2705 | the same sem; by doing a strong recv from SOs popped of the |
| 2706 | stack, they acquire dependencies on the posting thread |
| 2707 | segment(s). */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2708 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2709 | Thread* thr; |
| 2710 | SO* so; |
| 2711 | Thr* hbthr; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2712 | |
| 2713 | if (SHOW_EVENTS >= 1) |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2714 | VG_(printf)("evh__HG_POSIX_SEM_POST_PRE(ctid=%d, sem=%p)\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2715 | (Int)tid, (void*)sem ); |
| 2716 | |
| 2717 | thr = map_threads_maybe_lookup( tid ); |
| 2718 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2719 | |
| 2720 | // error-if: sem is bogus |
| 2721 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2722 | hbthr = thr->hbthr; |
| 2723 | tl_assert(hbthr); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2724 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2725 | so = libhb_so_alloc(); |
| 2726 | libhb_so_send( hbthr, so, True/*strong send*/ ); |
| 2727 | push_SO_for_sem( sem, so ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2728 | } |
| 2729 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2730 | static void evh__HG_POSIX_SEM_WAIT_POST ( ThreadId tid, void* sem ) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2731 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2732 | /* A sem_wait(sem) completed successfully. Pop the posting-SO for |
| 2733 | the 'sem' from this semaphore's SO-stack, and do a strong recv |
| 2734 | from it. This creates a dependency back to one of the post-ers |
| 2735 | for the semaphore. */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2736 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2737 | Thread* thr; |
| 2738 | SO* so; |
| 2739 | Thr* hbthr; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2740 | |
| 2741 | if (SHOW_EVENTS >= 1) |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 2742 | VG_(printf)("evh__HG_POSIX_SEM_WAIT_POST(ctid=%d, sem=%p)\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2743 | (Int)tid, (void*)sem ); |
| 2744 | |
| 2745 | thr = map_threads_maybe_lookup( tid ); |
| 2746 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2747 | |
| 2748 | // error-if: sem is bogus |
| 2749 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2750 | so = mb_pop_SO_for_sem( sem ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2751 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 2752 | if (so) { |
| 2753 | hbthr = thr->hbthr; |
| 2754 | tl_assert(hbthr); |
| 2755 | |
| 2756 | libhb_so_recv( hbthr, so, True/*strong recv*/ ); |
| 2757 | libhb_so_dealloc(so); |
| 2758 | } else { |
| 2759 | /* Hmm. How can a wait on 'sem' succeed if nobody posted to it? |
| 2760 | If this happened it would surely be a bug in the threads |
| 2761 | library. */ |
| 2762 | HG_(record_error_Misc)( |
| 2763 | thr, "Bug in libpthread: sem_wait succeeded on" |
| 2764 | " semaphore without prior sem_post"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 2765 | } |
| 2766 | } |
| 2767 | |
| 2768 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2769 | /* -------------------------------------------------------- */ |
| 2770 | /* -------------- events to do with barriers -------------- */ |
| 2771 | /* -------------------------------------------------------- */ |
| 2772 | |
| 2773 | typedef |
| 2774 | struct { |
| 2775 | Bool initted; /* has it yet been initted by guest? */ |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 2776 | Bool resizable; /* is resizing allowed? */ |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2777 | UWord size; /* declared size */ |
| 2778 | XArray* waiting; /* XA of Thread*. # present is 0 .. .size */ |
| 2779 | } |
| 2780 | Bar; |
| 2781 | |
| 2782 | static Bar* new_Bar ( void ) { |
| 2783 | Bar* bar = HG_(zalloc)( "hg.nB.1 (new_Bar)", sizeof(Bar) ); |
| 2784 | tl_assert(bar); |
| 2785 | /* all fields are zero */ |
| 2786 | tl_assert(bar->initted == False); |
| 2787 | return bar; |
| 2788 | } |
| 2789 | |
| 2790 | static void delete_Bar ( Bar* bar ) { |
| 2791 | tl_assert(bar); |
| 2792 | if (bar->waiting) |
| 2793 | VG_(deleteXA)(bar->waiting); |
| 2794 | HG_(free)(bar); |
| 2795 | } |
| 2796 | |
| 2797 | /* A mapping which stores auxiliary data for barriers. */ |
| 2798 | |
| 2799 | /* pthread_barrier_t* -> Bar* */ |
| 2800 | static WordFM* map_barrier_to_Bar = NULL; |
| 2801 | |
| 2802 | static void map_barrier_to_Bar_INIT ( void ) { |
| 2803 | if (UNLIKELY(map_barrier_to_Bar == NULL)) { |
| 2804 | map_barrier_to_Bar = VG_(newFM)( HG_(zalloc), |
| 2805 | "hg.mbtBI.1", HG_(free), NULL ); |
| 2806 | tl_assert(map_barrier_to_Bar != NULL); |
| 2807 | } |
| 2808 | } |
| 2809 | |
| 2810 | static Bar* map_barrier_to_Bar_lookup_or_alloc ( void* barrier ) { |
| 2811 | UWord key, val; |
| 2812 | map_barrier_to_Bar_INIT(); |
| 2813 | if (VG_(lookupFM)( map_barrier_to_Bar, &key, &val, (UWord)barrier )) { |
| 2814 | tl_assert(key == (UWord)barrier); |
| 2815 | return (Bar*)val; |
| 2816 | } else { |
| 2817 | Bar* bar = new_Bar(); |
| 2818 | VG_(addToFM)( map_barrier_to_Bar, (UWord)barrier, (UWord)bar ); |
| 2819 | return bar; |
| 2820 | } |
| 2821 | } |
| 2822 | |
| 2823 | static void map_barrier_to_Bar_delete ( void* barrier ) { |
| 2824 | UWord keyW, valW; |
| 2825 | map_barrier_to_Bar_INIT(); |
| 2826 | if (VG_(delFromFM)( map_barrier_to_Bar, &keyW, &valW, (UWord)barrier )) { |
| 2827 | Bar* bar = (Bar*)valW; |
| 2828 | tl_assert(keyW == (UWord)barrier); |
| 2829 | delete_Bar(bar); |
| 2830 | } |
| 2831 | } |
| 2832 | |
| 2833 | |
| 2834 | static void evh__HG_PTHREAD_BARRIER_INIT_PRE ( ThreadId tid, |
| 2835 | void* barrier, |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 2836 | UWord count, |
| 2837 | UWord resizable ) |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2838 | { |
| 2839 | Thread* thr; |
| 2840 | Bar* bar; |
| 2841 | |
| 2842 | if (SHOW_EVENTS >= 1) |
| 2843 | VG_(printf)("evh__HG_PTHREAD_BARRIER_INIT_PRE" |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 2844 | "(tid=%d, barrier=%p, count=%lu, resizable=%lu)\n", |
| 2845 | (Int)tid, (void*)barrier, count, resizable ); |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2846 | |
| 2847 | thr = map_threads_maybe_lookup( tid ); |
| 2848 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2849 | |
| 2850 | if (count == 0) { |
| 2851 | HG_(record_error_Misc)( |
| 2852 | thr, "pthread_barrier_init: 'count' argument is zero" |
| 2853 | ); |
| 2854 | } |
| 2855 | |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 2856 | if (resizable != 0 && resizable != 1) { |
| 2857 | HG_(record_error_Misc)( |
| 2858 | thr, "pthread_barrier_init: invalid 'resizable' argument" |
| 2859 | ); |
| 2860 | } |
| 2861 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2862 | bar = map_barrier_to_Bar_lookup_or_alloc(barrier); |
| 2863 | tl_assert(bar); |
| 2864 | |
| 2865 | if (bar->initted) { |
| 2866 | HG_(record_error_Misc)( |
| 2867 | thr, "pthread_barrier_init: barrier is already initialised" |
| 2868 | ); |
| 2869 | } |
| 2870 | |
| 2871 | if (bar->waiting && VG_(sizeXA)(bar->waiting) > 0) { |
| 2872 | tl_assert(bar->initted); |
| 2873 | HG_(record_error_Misc)( |
sewardj | 553655c | 2008-11-14 19:41:19 +0000 | [diff] [blame] | 2874 | thr, "pthread_barrier_init: threads are waiting at barrier" |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2875 | ); |
| 2876 | VG_(dropTailXA)(bar->waiting, VG_(sizeXA)(bar->waiting)); |
| 2877 | } |
| 2878 | if (!bar->waiting) { |
| 2879 | bar->waiting = VG_(newXA)( HG_(zalloc), "hg.eHPBIP.1", HG_(free), |
| 2880 | sizeof(Thread*) ); |
| 2881 | } |
| 2882 | |
| 2883 | tl_assert(bar->waiting); |
| 2884 | tl_assert(VG_(sizeXA)(bar->waiting) == 0); |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 2885 | bar->initted = True; |
| 2886 | bar->resizable = resizable == 1 ? True : False; |
| 2887 | bar->size = count; |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2888 | } |
| 2889 | |
| 2890 | |
| 2891 | static void evh__HG_PTHREAD_BARRIER_DESTROY_PRE ( ThreadId tid, |
| 2892 | void* barrier ) |
| 2893 | { |
sewardj | 553655c | 2008-11-14 19:41:19 +0000 | [diff] [blame] | 2894 | Thread* thr; |
| 2895 | Bar* bar; |
| 2896 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2897 | /* Deal with destroy events. The only purpose is to free storage |
| 2898 | associated with the barrier, so as to avoid any possible |
| 2899 | resource leaks. */ |
| 2900 | if (SHOW_EVENTS >= 1) |
| 2901 | VG_(printf)("evh__HG_PTHREAD_BARRIER_DESTROY_PRE" |
| 2902 | "(tid=%d, barrier=%p)\n", |
| 2903 | (Int)tid, (void*)barrier ); |
| 2904 | |
sewardj | 553655c | 2008-11-14 19:41:19 +0000 | [diff] [blame] | 2905 | thr = map_threads_maybe_lookup( tid ); |
| 2906 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 2907 | |
| 2908 | bar = map_barrier_to_Bar_lookup_or_alloc(barrier); |
| 2909 | tl_assert(bar); |
| 2910 | |
| 2911 | if (!bar->initted) { |
| 2912 | HG_(record_error_Misc)( |
| 2913 | thr, "pthread_barrier_destroy: barrier was never initialised" |
| 2914 | ); |
| 2915 | } |
| 2916 | |
| 2917 | if (bar->initted && bar->waiting && VG_(sizeXA)(bar->waiting) > 0) { |
| 2918 | HG_(record_error_Misc)( |
| 2919 | thr, "pthread_barrier_destroy: threads are waiting at barrier" |
| 2920 | ); |
| 2921 | } |
| 2922 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2923 | /* Maybe we shouldn't do this; just let it persist, so that when it |
| 2924 | is reinitialised we don't need to do any dynamic memory |
| 2925 | allocation? The downside is a potentially unlimited space leak, |
| 2926 | if the client creates (in turn) a large number of barriers all |
| 2927 | at different locations. Note that if we do later move to the |
| 2928 | don't-delete-it scheme, we need to mark the barrier as |
| 2929 | uninitialised again since otherwise a later _init call will |
sewardj | 553655c | 2008-11-14 19:41:19 +0000 | [diff] [blame] | 2930 | elicit a duplicate-init error. */ |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2931 | map_barrier_to_Bar_delete( barrier ); |
| 2932 | } |
| 2933 | |
| 2934 | |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 2935 | /* All the threads have arrived. Now do the Interesting Bit. Get a |
| 2936 | new synchronisation object and do a weak send to it from all the |
| 2937 | participating threads. This makes its vector clocks be the join of |
| 2938 | all the individual threads' vector clocks. Then do a strong |
| 2939 | receive from it back to all threads, so that their VCs are a copy |
| 2940 | of it (hence are all equal to the join of their original VCs.) */ |
| 2941 | static void do_barrier_cross_sync_and_empty ( Bar* bar ) |
| 2942 | { |
| 2943 | /* XXX check bar->waiting has no duplicates */ |
| 2944 | UWord i; |
| 2945 | SO* so = libhb_so_alloc(); |
| 2946 | |
| 2947 | tl_assert(bar->waiting); |
| 2948 | tl_assert(VG_(sizeXA)(bar->waiting) == bar->size); |
| 2949 | |
| 2950 | /* compute the join ... */ |
| 2951 | for (i = 0; i < bar->size; i++) { |
| 2952 | Thread* t = *(Thread**)VG_(indexXA)(bar->waiting, i); |
| 2953 | Thr* hbthr = t->hbthr; |
| 2954 | libhb_so_send( hbthr, so, False/*weak send*/ ); |
| 2955 | } |
| 2956 | /* ... and distribute to all threads */ |
| 2957 | for (i = 0; i < bar->size; i++) { |
| 2958 | Thread* t = *(Thread**)VG_(indexXA)(bar->waiting, i); |
| 2959 | Thr* hbthr = t->hbthr; |
| 2960 | libhb_so_recv( hbthr, so, True/*strong recv*/ ); |
| 2961 | } |
| 2962 | |
| 2963 | /* finally, we must empty out the waiting vector */ |
| 2964 | VG_(dropTailXA)(bar->waiting, VG_(sizeXA)(bar->waiting)); |
| 2965 | |
| 2966 | /* and we don't need this any more. Perhaps a stack-allocated |
| 2967 | SO would be better? */ |
| 2968 | libhb_so_dealloc(so); |
| 2969 | } |
| 2970 | |
| 2971 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 2972 | static void evh__HG_PTHREAD_BARRIER_WAIT_PRE ( ThreadId tid, |
| 2973 | void* barrier ) |
| 2974 | { |
sewardj | 1c466b7 | 2008-11-19 11:52:14 +0000 | [diff] [blame] | 2975 | /* This function gets called after a client thread calls |
| 2976 | pthread_barrier_wait but before it arrives at the real |
| 2977 | pthread_barrier_wait. |
| 2978 | |
| 2979 | Why is the following correct? It's a bit subtle. |
| 2980 | |
| 2981 | If this is not the last thread arriving at the barrier, we simply |
| 2982 | note its presence and return. Because valgrind (at least as of |
| 2983 | Nov 08) is single threaded, we are guaranteed safe from any race |
| 2984 | conditions when in this function -- no other client threads are |
| 2985 | running. |
| 2986 | |
| 2987 | If this is the last thread, then we are again the only running |
| 2988 | thread. All the other threads will have either arrived at the |
| 2989 | real pthread_barrier_wait or are on their way to it, but in any |
| 2990 | case are guaranteed not to be able to move past it, because this |
| 2991 | thread is currently in this function and so has not yet arrived |
| 2992 | at the real pthread_barrier_wait. That means that: |
| 2993 | |
| 2994 | 1. While we are in this function, none of the other threads |
| 2995 | waiting at the barrier can move past it. |
| 2996 | |
| 2997 | 2. When this function returns (and simulated execution resumes), |
| 2998 | this thread and all other waiting threads will be able to move |
| 2999 | past the real barrier. |
| 3000 | |
| 3001 | Because of this, it is now safe to update the vector clocks of |
| 3002 | all threads, to represent the fact that they all arrived at the |
| 3003 | barrier and have all moved on. There is no danger of any |
| 3004 | complications to do with some threads leaving the barrier and |
| 3005 | racing back round to the front, whilst others are still leaving |
| 3006 | (which is the primary source of complication in correct handling/ |
| 3007 | implementation of barriers). That can't happen because we update |
| 3008 | here our data structures so as to indicate that the threads have |
| 3009 | passed the barrier, even though, as per (2) above, they are |
| 3010 | guaranteed not to pass the barrier until we return. |
| 3011 | |
| 3012 | This relies crucially on Valgrind being single threaded. If that |
| 3013 | changes, this will need to be reconsidered. |
| 3014 | */ |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3015 | Thread* thr; |
| 3016 | Bar* bar; |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 3017 | UWord present; |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3018 | |
| 3019 | if (SHOW_EVENTS >= 1) |
| 3020 | VG_(printf)("evh__HG_PTHREAD_BARRIER_WAIT_PRE" |
| 3021 | "(tid=%d, barrier=%p)\n", |
| 3022 | (Int)tid, (void*)barrier ); |
| 3023 | |
| 3024 | thr = map_threads_maybe_lookup( tid ); |
| 3025 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 3026 | |
| 3027 | bar = map_barrier_to_Bar_lookup_or_alloc(barrier); |
| 3028 | tl_assert(bar); |
| 3029 | |
| 3030 | if (!bar->initted) { |
| 3031 | HG_(record_error_Misc)( |
| 3032 | thr, "pthread_barrier_wait: barrier is uninitialised" |
| 3033 | ); |
| 3034 | return; /* client is broken .. avoid assertions below */ |
| 3035 | } |
| 3036 | |
| 3037 | /* guaranteed by _INIT_PRE above */ |
| 3038 | tl_assert(bar->size > 0); |
| 3039 | tl_assert(bar->waiting); |
| 3040 | |
| 3041 | VG_(addToXA)( bar->waiting, &thr ); |
| 3042 | |
| 3043 | /* guaranteed by this function */ |
| 3044 | present = VG_(sizeXA)(bar->waiting); |
| 3045 | tl_assert(present > 0 && present <= bar->size); |
| 3046 | |
| 3047 | if (present < bar->size) |
| 3048 | return; |
| 3049 | |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 3050 | do_barrier_cross_sync_and_empty(bar); |
| 3051 | } |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3052 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3053 | |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 3054 | static void evh__HG_PTHREAD_BARRIER_RESIZE_PRE ( ThreadId tid, |
| 3055 | void* barrier, |
| 3056 | UWord newcount ) |
| 3057 | { |
| 3058 | Thread* thr; |
| 3059 | Bar* bar; |
| 3060 | UWord present; |
| 3061 | |
| 3062 | if (SHOW_EVENTS >= 1) |
| 3063 | VG_(printf)("evh__HG_PTHREAD_BARRIER_RESIZE_PRE" |
| 3064 | "(tid=%d, barrier=%p, newcount=%lu)\n", |
| 3065 | (Int)tid, (void*)barrier, newcount ); |
| 3066 | |
| 3067 | thr = map_threads_maybe_lookup( tid ); |
| 3068 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 3069 | |
| 3070 | bar = map_barrier_to_Bar_lookup_or_alloc(barrier); |
| 3071 | tl_assert(bar); |
| 3072 | |
| 3073 | if (!bar->initted) { |
| 3074 | HG_(record_error_Misc)( |
| 3075 | thr, "pthread_barrier_resize: barrier is uninitialised" |
| 3076 | ); |
| 3077 | return; /* client is broken .. avoid assertions below */ |
| 3078 | } |
| 3079 | |
| 3080 | if (!bar->resizable) { |
| 3081 | HG_(record_error_Misc)( |
| 3082 | thr, "pthread_barrier_resize: barrier is may not be resized" |
| 3083 | ); |
| 3084 | return; /* client is broken .. avoid assertions below */ |
| 3085 | } |
| 3086 | |
| 3087 | if (newcount == 0) { |
| 3088 | HG_(record_error_Misc)( |
| 3089 | thr, "pthread_barrier_resize: 'newcount' argument is zero" |
| 3090 | ); |
| 3091 | return; /* client is broken .. avoid assertions below */ |
| 3092 | } |
| 3093 | |
| 3094 | /* guaranteed by _INIT_PRE above */ |
| 3095 | tl_assert(bar->size > 0); |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3096 | tl_assert(bar->waiting); |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 3097 | /* Guaranteed by this fn */ |
| 3098 | tl_assert(newcount > 0); |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3099 | |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 3100 | if (newcount >= bar->size) { |
| 3101 | /* Increasing the capacity. There's no possibility of threads |
| 3102 | moving on from the barrier in this situation, so just note |
| 3103 | the fact and do nothing more. */ |
| 3104 | bar->size = newcount; |
| 3105 | } else { |
| 3106 | /* Decreasing the capacity. If we decrease it to be equal or |
| 3107 | below the number of waiting threads, they will now move past |
| 3108 | the barrier, so need to mess with dep edges in the same way |
| 3109 | as if the barrier had filled up normally. */ |
| 3110 | present = VG_(sizeXA)(bar->waiting); |
| 3111 | tl_assert(present >= 0 && present <= bar->size); |
| 3112 | if (newcount <= present) { |
| 3113 | bar->size = present; /* keep the cross_sync call happy */ |
| 3114 | do_barrier_cross_sync_and_empty(bar); |
| 3115 | } |
| 3116 | bar->size = newcount; |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3117 | } |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 3118 | } |
| 3119 | |
| 3120 | |
sewardj | ed2e72e | 2009-08-14 11:08:24 +0000 | [diff] [blame] | 3121 | /* ----------------------------------------------------- */ |
| 3122 | /* ----- events to do with user-specified HB edges ----- */ |
| 3123 | /* ----------------------------------------------------- */ |
| 3124 | |
| 3125 | /* A mapping from arbitrary UWord tag to the SO associated with it. |
| 3126 | The UWord tags are meaningless to us, interpreted only by the |
| 3127 | user. */ |
| 3128 | |
| 3129 | |
| 3130 | |
| 3131 | /* UWord -> SO* */ |
| 3132 | static WordFM* map_usertag_to_SO = NULL; |
| 3133 | |
| 3134 | static void map_usertag_to_SO_INIT ( void ) { |
| 3135 | if (UNLIKELY(map_usertag_to_SO == NULL)) { |
| 3136 | map_usertag_to_SO = VG_(newFM)( HG_(zalloc), |
| 3137 | "hg.mutS.1", HG_(free), NULL ); |
| 3138 | tl_assert(map_usertag_to_SO != NULL); |
| 3139 | } |
| 3140 | } |
| 3141 | |
| 3142 | static SO* map_usertag_to_SO_lookup_or_alloc ( UWord usertag ) { |
| 3143 | UWord key, val; |
| 3144 | map_usertag_to_SO_INIT(); |
| 3145 | if (VG_(lookupFM)( map_usertag_to_SO, &key, &val, usertag )) { |
| 3146 | tl_assert(key == (UWord)usertag); |
| 3147 | return (SO*)val; |
| 3148 | } else { |
| 3149 | SO* so = libhb_so_alloc(); |
| 3150 | VG_(addToFM)( map_usertag_to_SO, usertag, (UWord)so ); |
| 3151 | return so; |
| 3152 | } |
| 3153 | } |
| 3154 | |
| 3155 | // If it's ever needed (XXX check before use) |
| 3156 | //static void map_usertag_to_SO_delete ( UWord usertag ) { |
| 3157 | // UWord keyW, valW; |
| 3158 | // map_usertag_to_SO_INIT(); |
| 3159 | // if (VG_(delFromFM)( map_usertag_to_SO, &keyW, &valW, usertag )) { |
| 3160 | // SO* so = (SO*)valW; |
| 3161 | // tl_assert(keyW == usertag); |
| 3162 | // tl_assert(so); |
| 3163 | // libhb_so_dealloc(so); |
| 3164 | // } |
| 3165 | //} |
| 3166 | |
| 3167 | |
| 3168 | static |
| 3169 | void evh__HG_USERSO_SEND_PRE ( ThreadId tid, UWord usertag ) |
| 3170 | { |
| 3171 | /* TID is just about to notionally sent a message on a notional |
| 3172 | abstract synchronisation object whose identity is given by |
| 3173 | USERTAG. Bind USERTAG to a real SO if it is not already so |
| 3174 | bound, and do a 'strong send' on the SO. This is later used by |
| 3175 | other thread(s) which successfully 'receive' from the SO, |
| 3176 | thereby acquiring a dependency on this signalling event. */ |
| 3177 | Thread* thr; |
| 3178 | SO* so; |
| 3179 | |
| 3180 | if (SHOW_EVENTS >= 1) |
| 3181 | VG_(printf)("evh__HG_USERSO_SEND_PRE(ctid=%d, usertag=%#lx)\n", |
| 3182 | (Int)tid, usertag ); |
| 3183 | |
| 3184 | thr = map_threads_maybe_lookup( tid ); |
| 3185 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 3186 | |
| 3187 | so = map_usertag_to_SO_lookup_or_alloc( usertag ); |
| 3188 | tl_assert(so); |
| 3189 | |
| 3190 | libhb_so_send( thr->hbthr, so, True/*strong_send*/ ); |
| 3191 | } |
| 3192 | |
| 3193 | static |
| 3194 | void evh__HG_USERSO_RECV_POST ( ThreadId tid, UWord usertag ) |
| 3195 | { |
| 3196 | /* TID has just notionally received a message from a notional |
| 3197 | abstract synchronisation object whose identity is given by |
| 3198 | USERTAG. Bind USERTAG to a real SO if it is not already so |
| 3199 | bound. If the SO has at some point in the past been 'sent' on, |
| 3200 | to a 'strong receive' on it, thereby acquiring a dependency on |
| 3201 | the sender. */ |
| 3202 | Thread* thr; |
| 3203 | SO* so; |
| 3204 | |
| 3205 | if (SHOW_EVENTS >= 1) |
| 3206 | VG_(printf)("evh__HG_USERSO_RECV_POST(ctid=%d, usertag=%#lx)\n", |
| 3207 | (Int)tid, usertag ); |
| 3208 | |
| 3209 | thr = map_threads_maybe_lookup( tid ); |
| 3210 | tl_assert(thr); /* cannot fail - Thread* must already exist */ |
| 3211 | |
| 3212 | so = map_usertag_to_SO_lookup_or_alloc( usertag ); |
| 3213 | tl_assert(so); |
| 3214 | |
| 3215 | /* Acquire a dependency on it. If the SO has never so far been |
| 3216 | sent on, then libhb_so_recv will do nothing. So we're safe |
| 3217 | regardless of SO's history. */ |
| 3218 | libhb_so_recv( thr->hbthr, so, True/*strong_recv*/ ); |
| 3219 | } |
| 3220 | |
| 3221 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3222 | /*--------------------------------------------------------------*/ |
| 3223 | /*--- Lock acquisition order monitoring ---*/ |
| 3224 | /*--------------------------------------------------------------*/ |
| 3225 | |
| 3226 | /* FIXME: here are some optimisations still to do in |
| 3227 | laog__pre_thread_acquires_lock. |
| 3228 | |
| 3229 | The graph is structured so that if L1 --*--> L2 then L1 must be |
| 3230 | acquired before L2. |
| 3231 | |
| 3232 | The common case is that some thread T holds (eg) L1 L2 and L3 and |
| 3233 | is repeatedly acquiring and releasing Ln, and there is no ordering |
| 3234 | error in what it is doing. Hence it repeatly: |
| 3235 | |
| 3236 | (1) searches laog to see if Ln --*--> {L1,L2,L3}, which always |
| 3237 | produces the answer No (because there is no error). |
| 3238 | |
| 3239 | (2) adds edges {L1,L2,L3} --> Ln to laog, which are already present |
| 3240 | (because they already got added the first time T acquired Ln). |
| 3241 | |
| 3242 | Hence cache these two events: |
| 3243 | |
| 3244 | (1) Cache result of the query from last time. Invalidate the cache |
| 3245 | any time any edges are added to or deleted from laog. |
| 3246 | |
| 3247 | (2) Cache these add-edge requests and ignore them if said edges |
| 3248 | have already been added to laog. Invalidate the cache any time |
| 3249 | any edges are deleted from laog. |
| 3250 | */ |
| 3251 | |
| 3252 | typedef |
| 3253 | struct { |
| 3254 | WordSetID inns; /* in univ_laog */ |
| 3255 | WordSetID outs; /* in univ_laog */ |
| 3256 | } |
| 3257 | LAOGLinks; |
| 3258 | |
| 3259 | /* lock order acquisition graph */ |
| 3260 | static WordFM* laog = NULL; /* WordFM Lock* LAOGLinks* */ |
| 3261 | |
| 3262 | /* EXPOSITION ONLY: for each edge in 'laog', record the two places |
| 3263 | where that edge was created, so that we can show the user later if |
| 3264 | we need to. */ |
| 3265 | typedef |
| 3266 | struct { |
| 3267 | Addr src_ga; /* Lock guest addresses for */ |
| 3268 | Addr dst_ga; /* src/dst of the edge */ |
| 3269 | ExeContext* src_ec; /* And corresponding places where that */ |
| 3270 | ExeContext* dst_ec; /* ordering was established */ |
| 3271 | } |
| 3272 | LAOGLinkExposition; |
| 3273 | |
sewardj | 250ec2e | 2008-02-15 22:02:30 +0000 | [diff] [blame] | 3274 | static Word cmp_LAOGLinkExposition ( UWord llx1W, UWord llx2W ) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3275 | /* Compare LAOGLinkExposition*s by (src_ga,dst_ga) field pair. */ |
| 3276 | LAOGLinkExposition* llx1 = (LAOGLinkExposition*)llx1W; |
| 3277 | LAOGLinkExposition* llx2 = (LAOGLinkExposition*)llx2W; |
| 3278 | if (llx1->src_ga < llx2->src_ga) return -1; |
| 3279 | if (llx1->src_ga > llx2->src_ga) return 1; |
| 3280 | if (llx1->dst_ga < llx2->dst_ga) return -1; |
| 3281 | if (llx1->dst_ga > llx2->dst_ga) return 1; |
| 3282 | return 0; |
| 3283 | } |
| 3284 | |
| 3285 | static WordFM* laog_exposition = NULL; /* WordFM LAOGLinkExposition* NULL */ |
| 3286 | /* end EXPOSITION ONLY */ |
| 3287 | |
| 3288 | |
sewardj | a65db10 | 2009-01-26 10:45:16 +0000 | [diff] [blame] | 3289 | __attribute__((noinline)) |
| 3290 | static void laog__init ( void ) |
| 3291 | { |
| 3292 | tl_assert(!laog); |
| 3293 | tl_assert(!laog_exposition); |
| 3294 | |
| 3295 | laog = VG_(newFM)( HG_(zalloc), "hg.laog__init.1", |
| 3296 | HG_(free), NULL/*unboxedcmp*/ ); |
| 3297 | |
| 3298 | laog_exposition = VG_(newFM)( HG_(zalloc), "hg.laog__init.2", HG_(free), |
| 3299 | cmp_LAOGLinkExposition ); |
| 3300 | tl_assert(laog); |
| 3301 | tl_assert(laog_exposition); |
| 3302 | } |
| 3303 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3304 | static void laog__show ( Char* who ) { |
| 3305 | Word i, ws_size; |
sewardj | 250ec2e | 2008-02-15 22:02:30 +0000 | [diff] [blame] | 3306 | UWord* ws_words; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3307 | Lock* me; |
| 3308 | LAOGLinks* links; |
| 3309 | VG_(printf)("laog (requested by %s) {\n", who); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3310 | VG_(initIterFM)( laog ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3311 | me = NULL; |
| 3312 | links = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3313 | while (VG_(nextIterFM)( laog, (Word*)&me, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 3314 | (Word*)&links )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3315 | tl_assert(me); |
| 3316 | tl_assert(links); |
| 3317 | VG_(printf)(" node %p:\n", me); |
| 3318 | HG_(getPayloadWS)( &ws_words, &ws_size, univ_laog, links->inns ); |
| 3319 | for (i = 0; i < ws_size; i++) |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 3320 | VG_(printf)(" inn %#lx\n", ws_words[i] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3321 | HG_(getPayloadWS)( &ws_words, &ws_size, univ_laog, links->outs ); |
| 3322 | for (i = 0; i < ws_size; i++) |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 3323 | VG_(printf)(" out %#lx\n", ws_words[i] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3324 | me = NULL; |
| 3325 | links = NULL; |
| 3326 | } |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3327 | VG_(doneIterFM)( laog ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3328 | VG_(printf)("}\n"); |
| 3329 | } |
| 3330 | |
| 3331 | __attribute__((noinline)) |
| 3332 | static void laog__add_edge ( Lock* src, Lock* dst ) { |
| 3333 | Word keyW; |
| 3334 | LAOGLinks* links; |
| 3335 | Bool presentF, presentR; |
| 3336 | if (0) VG_(printf)("laog__add_edge %p %p\n", src, dst); |
| 3337 | |
| 3338 | /* Take the opportunity to sanity check the graph. Record in |
| 3339 | presentF if there is already a src->dst mapping in this node's |
| 3340 | forwards links, and presentR if there is already a src->dst |
| 3341 | mapping in this node's backwards links. They should agree! |
| 3342 | Also, we need to know whether the edge was already present so as |
| 3343 | to decide whether or not to update the link details mapping. We |
| 3344 | can compute presentF and presentR essentially for free, so may |
| 3345 | as well do this always. */ |
| 3346 | presentF = presentR = False; |
| 3347 | |
| 3348 | /* Update the out edges for src */ |
| 3349 | keyW = 0; |
| 3350 | links = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3351 | if (VG_(lookupFM)( laog, &keyW, (Word*)&links, (Word)src )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3352 | WordSetID outs_new; |
| 3353 | tl_assert(links); |
| 3354 | tl_assert(keyW == (Word)src); |
| 3355 | outs_new = HG_(addToWS)( univ_laog, links->outs, (Word)dst ); |
| 3356 | presentF = outs_new == links->outs; |
| 3357 | links->outs = outs_new; |
| 3358 | } else { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3359 | links = HG_(zalloc)("hg.lae.1", sizeof(LAOGLinks)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3360 | links->inns = HG_(emptyWS)( univ_laog ); |
| 3361 | links->outs = HG_(singletonWS)( univ_laog, (Word)dst ); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3362 | VG_(addToFM)( laog, (Word)src, (Word)links ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3363 | } |
| 3364 | /* Update the in edges for dst */ |
| 3365 | keyW = 0; |
| 3366 | links = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3367 | if (VG_(lookupFM)( laog, &keyW, (Word*)&links, (Word)dst )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3368 | WordSetID inns_new; |
| 3369 | tl_assert(links); |
| 3370 | tl_assert(keyW == (Word)dst); |
| 3371 | inns_new = HG_(addToWS)( univ_laog, links->inns, (Word)src ); |
| 3372 | presentR = inns_new == links->inns; |
| 3373 | links->inns = inns_new; |
| 3374 | } else { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3375 | links = HG_(zalloc)("hg.lae.2", sizeof(LAOGLinks)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3376 | links->inns = HG_(singletonWS)( univ_laog, (Word)src ); |
| 3377 | links->outs = HG_(emptyWS)( univ_laog ); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3378 | VG_(addToFM)( laog, (Word)dst, (Word)links ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3379 | } |
| 3380 | |
| 3381 | tl_assert( (presentF && presentR) || (!presentF && !presentR) ); |
| 3382 | |
| 3383 | if (!presentF && src->acquired_at && dst->acquired_at) { |
| 3384 | LAOGLinkExposition expo; |
| 3385 | /* If this edge is entering the graph, and we have acquired_at |
| 3386 | information for both src and dst, record those acquisition |
| 3387 | points. Hence, if there is later a violation of this |
| 3388 | ordering, we can show the user the two places in which the |
| 3389 | required src-dst ordering was previously established. */ |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 3390 | if (0) VG_(printf)("acquire edge %#lx %#lx\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3391 | src->guestaddr, dst->guestaddr); |
| 3392 | expo.src_ga = src->guestaddr; |
| 3393 | expo.dst_ga = dst->guestaddr; |
| 3394 | expo.src_ec = NULL; |
| 3395 | expo.dst_ec = NULL; |
| 3396 | tl_assert(laog_exposition); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3397 | if (VG_(lookupFM)( laog_exposition, NULL, NULL, (Word)&expo )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3398 | /* we already have it; do nothing */ |
| 3399 | } else { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3400 | LAOGLinkExposition* expo2 = HG_(zalloc)("hg.lae.3", |
| 3401 | sizeof(LAOGLinkExposition)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3402 | expo2->src_ga = src->guestaddr; |
| 3403 | expo2->dst_ga = dst->guestaddr; |
| 3404 | expo2->src_ec = src->acquired_at; |
| 3405 | expo2->dst_ec = dst->acquired_at; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3406 | VG_(addToFM)( laog_exposition, (Word)expo2, (Word)NULL ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3407 | } |
| 3408 | } |
| 3409 | } |
| 3410 | |
| 3411 | __attribute__((noinline)) |
| 3412 | static void laog__del_edge ( Lock* src, Lock* dst ) { |
| 3413 | Word keyW; |
| 3414 | LAOGLinks* links; |
| 3415 | if (0) VG_(printf)("laog__del_edge %p %p\n", src, dst); |
| 3416 | /* Update the out edges for src */ |
| 3417 | keyW = 0; |
| 3418 | links = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3419 | if (VG_(lookupFM)( laog, &keyW, (Word*)&links, (Word)src )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3420 | tl_assert(links); |
| 3421 | tl_assert(keyW == (Word)src); |
| 3422 | links->outs = HG_(delFromWS)( univ_laog, links->outs, (Word)dst ); |
| 3423 | } |
| 3424 | /* Update the in edges for dst */ |
| 3425 | keyW = 0; |
| 3426 | links = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3427 | if (VG_(lookupFM)( laog, &keyW, (Word*)&links, (Word)dst )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3428 | tl_assert(links); |
| 3429 | tl_assert(keyW == (Word)dst); |
| 3430 | links->inns = HG_(delFromWS)( univ_laog, links->inns, (Word)src ); |
| 3431 | } |
| 3432 | } |
| 3433 | |
| 3434 | __attribute__((noinline)) |
| 3435 | static WordSetID /* in univ_laog */ laog__succs ( Lock* lk ) { |
| 3436 | Word keyW; |
| 3437 | LAOGLinks* links; |
| 3438 | keyW = 0; |
| 3439 | links = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3440 | if (VG_(lookupFM)( laog, &keyW, (Word*)&links, (Word)lk )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3441 | tl_assert(links); |
| 3442 | tl_assert(keyW == (Word)lk); |
| 3443 | return links->outs; |
| 3444 | } else { |
| 3445 | return HG_(emptyWS)( univ_laog ); |
| 3446 | } |
| 3447 | } |
| 3448 | |
| 3449 | __attribute__((noinline)) |
| 3450 | static WordSetID /* in univ_laog */ laog__preds ( Lock* lk ) { |
| 3451 | Word keyW; |
| 3452 | LAOGLinks* links; |
| 3453 | keyW = 0; |
| 3454 | links = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3455 | if (VG_(lookupFM)( laog, &keyW, (Word*)&links, (Word)lk )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3456 | tl_assert(links); |
| 3457 | tl_assert(keyW == (Word)lk); |
| 3458 | return links->inns; |
| 3459 | } else { |
| 3460 | return HG_(emptyWS)( univ_laog ); |
| 3461 | } |
| 3462 | } |
| 3463 | |
| 3464 | __attribute__((noinline)) |
| 3465 | static void laog__sanity_check ( Char* who ) { |
| 3466 | Word i, ws_size; |
sewardj | 250ec2e | 2008-02-15 22:02:30 +0000 | [diff] [blame] | 3467 | UWord* ws_words; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3468 | Lock* me; |
| 3469 | LAOGLinks* links; |
sewardj | a65db10 | 2009-01-26 10:45:16 +0000 | [diff] [blame] | 3470 | if (UNLIKELY(!laog || !laog_exposition)) |
| 3471 | laog__init(); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3472 | VG_(initIterFM)( laog ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3473 | me = NULL; |
| 3474 | links = NULL; |
| 3475 | if (0) VG_(printf)("laog sanity check\n"); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3476 | while (VG_(nextIterFM)( laog, (Word*)&me, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 3477 | (Word*)&links )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3478 | tl_assert(me); |
| 3479 | tl_assert(links); |
| 3480 | HG_(getPayloadWS)( &ws_words, &ws_size, univ_laog, links->inns ); |
| 3481 | for (i = 0; i < ws_size; i++) { |
| 3482 | if ( ! HG_(elemWS)( univ_laog, |
| 3483 | laog__succs( (Lock*)ws_words[i] ), |
| 3484 | (Word)me )) |
| 3485 | goto bad; |
| 3486 | } |
| 3487 | HG_(getPayloadWS)( &ws_words, &ws_size, univ_laog, links->outs ); |
| 3488 | for (i = 0; i < ws_size; i++) { |
| 3489 | if ( ! HG_(elemWS)( univ_laog, |
| 3490 | laog__preds( (Lock*)ws_words[i] ), |
| 3491 | (Word)me )) |
| 3492 | goto bad; |
| 3493 | } |
| 3494 | me = NULL; |
| 3495 | links = NULL; |
| 3496 | } |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3497 | VG_(doneIterFM)( laog ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3498 | return; |
| 3499 | |
| 3500 | bad: |
| 3501 | VG_(printf)("laog__sanity_check(%s) FAILED\n", who); |
| 3502 | laog__show(who); |
| 3503 | tl_assert(0); |
| 3504 | } |
| 3505 | |
| 3506 | /* If there is a path in laog from 'src' to any of the elements in |
| 3507 | 'dst', return an arbitrarily chosen element of 'dst' reachable from |
| 3508 | 'src'. If no path exist from 'src' to any element in 'dst', return |
| 3509 | NULL. */ |
| 3510 | __attribute__((noinline)) |
| 3511 | static |
| 3512 | Lock* laog__do_dfs_from_to ( Lock* src, WordSetID dsts /* univ_lsets */ ) |
| 3513 | { |
| 3514 | Lock* ret; |
| 3515 | Word i, ssz; |
| 3516 | XArray* stack; /* of Lock* */ |
| 3517 | WordFM* visited; /* Lock* -> void, iow, Set(Lock*) */ |
| 3518 | Lock* here; |
| 3519 | WordSetID succs; |
| 3520 | Word succs_size; |
sewardj | 250ec2e | 2008-02-15 22:02:30 +0000 | [diff] [blame] | 3521 | UWord* succs_words; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3522 | //laog__sanity_check(); |
| 3523 | |
| 3524 | /* If the destination set is empty, we can never get there from |
| 3525 | 'src' :-), so don't bother to try */ |
| 3526 | if (HG_(isEmptyWS)( univ_lsets, dsts )) |
| 3527 | return NULL; |
| 3528 | |
| 3529 | ret = NULL; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3530 | stack = VG_(newXA)( HG_(zalloc), "hg.lddft.1", HG_(free), sizeof(Lock*) ); |
| 3531 | visited = VG_(newFM)( HG_(zalloc), "hg.lddft.2", HG_(free), NULL/*unboxedcmp*/ ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3532 | |
| 3533 | (void) VG_(addToXA)( stack, &src ); |
| 3534 | |
| 3535 | while (True) { |
| 3536 | |
| 3537 | ssz = VG_(sizeXA)( stack ); |
| 3538 | |
| 3539 | if (ssz == 0) { ret = NULL; break; } |
| 3540 | |
| 3541 | here = *(Lock**) VG_(indexXA)( stack, ssz-1 ); |
| 3542 | VG_(dropTailXA)( stack, 1 ); |
| 3543 | |
| 3544 | if (HG_(elemWS)( univ_lsets, dsts, (Word)here )) { ret = here; break; } |
| 3545 | |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3546 | if (VG_(lookupFM)( visited, NULL, NULL, (Word)here )) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3547 | continue; |
| 3548 | |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3549 | VG_(addToFM)( visited, (Word)here, 0 ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3550 | |
| 3551 | succs = laog__succs( here ); |
| 3552 | HG_(getPayloadWS)( &succs_words, &succs_size, univ_laog, succs ); |
| 3553 | for (i = 0; i < succs_size; i++) |
| 3554 | (void) VG_(addToXA)( stack, &succs_words[i] ); |
| 3555 | } |
| 3556 | |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3557 | VG_(deleteFM)( visited, NULL, NULL ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3558 | VG_(deleteXA)( stack ); |
| 3559 | return ret; |
| 3560 | } |
| 3561 | |
| 3562 | |
| 3563 | /* Thread 'thr' is acquiring 'lk'. Check for inconsistent ordering |
| 3564 | between 'lk' and the locks already held by 'thr' and issue a |
| 3565 | complaint if so. Also, update the ordering graph appropriately. |
| 3566 | */ |
| 3567 | __attribute__((noinline)) |
| 3568 | static void laog__pre_thread_acquires_lock ( |
| 3569 | Thread* thr, /* NB: BEFORE lock is added */ |
| 3570 | Lock* lk |
| 3571 | ) |
| 3572 | { |
sewardj | 250ec2e | 2008-02-15 22:02:30 +0000 | [diff] [blame] | 3573 | UWord* ls_words; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3574 | Word ls_size, i; |
| 3575 | Lock* other; |
| 3576 | |
| 3577 | /* It may be that 'thr' already holds 'lk' and is recursively |
| 3578 | relocking in. In this case we just ignore the call. */ |
| 3579 | /* NB: univ_lsets really is correct here */ |
| 3580 | if (HG_(elemWS)( univ_lsets, thr->locksetA, (Word)lk )) |
| 3581 | return; |
| 3582 | |
sewardj | a65db10 | 2009-01-26 10:45:16 +0000 | [diff] [blame] | 3583 | if (UNLIKELY(!laog || !laog_exposition)) |
| 3584 | laog__init(); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3585 | |
| 3586 | /* First, the check. Complain if there is any path in laog from lk |
| 3587 | to any of the locks already held by thr, since if any such path |
| 3588 | existed, it would mean that previously lk was acquired before |
| 3589 | (rather than after, as we are doing here) at least one of those |
| 3590 | locks. |
| 3591 | */ |
| 3592 | other = laog__do_dfs_from_to(lk, thr->locksetA); |
| 3593 | if (other) { |
| 3594 | LAOGLinkExposition key, *found; |
| 3595 | /* So we managed to find a path lk --*--> other in the graph, |
| 3596 | which implies that 'lk' should have been acquired before |
| 3597 | 'other' but is in fact being acquired afterwards. We present |
| 3598 | the lk/other arguments to record_error_LockOrder in the order |
| 3599 | in which they should have been acquired. */ |
| 3600 | /* Go look in the laog_exposition mapping, to find the allocation |
| 3601 | points for this edge, so we can show the user. */ |
| 3602 | key.src_ga = lk->guestaddr; |
| 3603 | key.dst_ga = other->guestaddr; |
| 3604 | key.src_ec = NULL; |
| 3605 | key.dst_ec = NULL; |
| 3606 | found = NULL; |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 3607 | if (VG_(lookupFM)( laog_exposition, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 3608 | (Word*)&found, NULL, (Word)&key )) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3609 | tl_assert(found != &key); |
| 3610 | tl_assert(found->src_ga == key.src_ga); |
| 3611 | tl_assert(found->dst_ga == key.dst_ga); |
| 3612 | tl_assert(found->src_ec); |
| 3613 | tl_assert(found->dst_ec); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3614 | HG_(record_error_LockOrder)( |
| 3615 | thr, lk->guestaddr, other->guestaddr, |
| 3616 | found->src_ec, found->dst_ec ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3617 | } else { |
| 3618 | /* Hmm. This can't happen (can it?) */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3619 | HG_(record_error_LockOrder)( |
| 3620 | thr, lk->guestaddr, other->guestaddr, |
| 3621 | NULL, NULL ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3622 | } |
| 3623 | } |
| 3624 | |
| 3625 | /* Second, add to laog the pairs |
| 3626 | (old, lk) | old <- locks already held by thr |
| 3627 | Since both old and lk are currently held by thr, their acquired_at |
| 3628 | fields must be non-NULL. |
| 3629 | */ |
| 3630 | tl_assert(lk->acquired_at); |
| 3631 | HG_(getPayloadWS)( &ls_words, &ls_size, univ_lsets, thr->locksetA ); |
| 3632 | for (i = 0; i < ls_size; i++) { |
| 3633 | Lock* old = (Lock*)ls_words[i]; |
| 3634 | tl_assert(old->acquired_at); |
| 3635 | laog__add_edge( old, lk ); |
| 3636 | } |
| 3637 | |
| 3638 | /* Why "except_Locks" ? We're here because a lock is being |
| 3639 | acquired by a thread, and we're in an inconsistent state here. |
| 3640 | See the call points in evhH__post_thread_{r,w}_acquires_lock. |
| 3641 | When called in this inconsistent state, locks__sanity_check duly |
| 3642 | barfs. */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3643 | if (HG_(clo_sanity_flags) & SCE_LAOG) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3644 | all_except_Locks__sanity_check("laog__pre_thread_acquires_lock-post"); |
| 3645 | } |
| 3646 | |
| 3647 | |
| 3648 | /* Delete from 'laog' any pair mentioning a lock in locksToDelete */ |
| 3649 | |
| 3650 | __attribute__((noinline)) |
| 3651 | static void laog__handle_one_lock_deletion ( Lock* lk ) |
| 3652 | { |
| 3653 | WordSetID preds, succs; |
| 3654 | Word preds_size, succs_size, i, j; |
sewardj | 250ec2e | 2008-02-15 22:02:30 +0000 | [diff] [blame] | 3655 | UWord *preds_words, *succs_words; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3656 | |
sewardj | a65db10 | 2009-01-26 10:45:16 +0000 | [diff] [blame] | 3657 | if (UNLIKELY(!laog || !laog_exposition)) |
| 3658 | laog__init(); |
| 3659 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3660 | preds = laog__preds( lk ); |
| 3661 | succs = laog__succs( lk ); |
| 3662 | |
| 3663 | HG_(getPayloadWS)( &preds_words, &preds_size, univ_laog, preds ); |
| 3664 | for (i = 0; i < preds_size; i++) |
| 3665 | laog__del_edge( (Lock*)preds_words[i], lk ); |
| 3666 | |
| 3667 | HG_(getPayloadWS)( &succs_words, &succs_size, univ_laog, succs ); |
| 3668 | for (j = 0; j < succs_size; j++) |
| 3669 | laog__del_edge( lk, (Lock*)succs_words[j] ); |
| 3670 | |
| 3671 | for (i = 0; i < preds_size; i++) { |
| 3672 | for (j = 0; j < succs_size; j++) { |
| 3673 | if (preds_words[i] != succs_words[j]) { |
| 3674 | /* This can pass unlocked locks to laog__add_edge, since |
| 3675 | we're deleting stuff. So their acquired_at fields may |
| 3676 | be NULL. */ |
| 3677 | laog__add_edge( (Lock*)preds_words[i], (Lock*)succs_words[j] ); |
| 3678 | } |
| 3679 | } |
| 3680 | } |
| 3681 | } |
| 3682 | |
sewardj | 1cbc12f | 2008-11-10 16:16:46 +0000 | [diff] [blame] | 3683 | //__attribute__((noinline)) |
| 3684 | //static void laog__handle_lock_deletions ( |
| 3685 | // WordSetID /* in univ_laog */ locksToDelete |
| 3686 | // ) |
| 3687 | //{ |
| 3688 | // Word i, ws_size; |
| 3689 | // UWord* ws_words; |
| 3690 | // |
sewardj | a65db10 | 2009-01-26 10:45:16 +0000 | [diff] [blame] | 3691 | // if (UNLIKELY(!laog || !laog_exposition)) |
| 3692 | // laog__init(); |
sewardj | 1cbc12f | 2008-11-10 16:16:46 +0000 | [diff] [blame] | 3693 | // |
| 3694 | // HG_(getPayloadWS)( &ws_words, &ws_size, univ_lsets, locksToDelete ); |
| 3695 | // for (i = 0; i < ws_size; i++) |
| 3696 | // laog__handle_one_lock_deletion( (Lock*)ws_words[i] ); |
| 3697 | // |
| 3698 | // if (HG_(clo_sanity_flags) & SCE_LAOG) |
| 3699 | // all__sanity_check("laog__handle_lock_deletions-post"); |
| 3700 | //} |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3701 | |
| 3702 | |
| 3703 | /*--------------------------------------------------------------*/ |
| 3704 | /*--- Malloc/free replacements ---*/ |
| 3705 | /*--------------------------------------------------------------*/ |
| 3706 | |
| 3707 | typedef |
| 3708 | struct { |
| 3709 | void* next; /* required by m_hashtable */ |
| 3710 | Addr payload; /* ptr to actual block */ |
| 3711 | SizeT szB; /* size requested */ |
| 3712 | ExeContext* where; /* where it was allocated */ |
| 3713 | Thread* thr; /* allocating thread */ |
| 3714 | } |
| 3715 | MallocMeta; |
| 3716 | |
| 3717 | /* A hash table of MallocMetas, used to track malloc'd blocks |
| 3718 | (obviously). */ |
| 3719 | static VgHashTable hg_mallocmeta_table = NULL; |
| 3720 | |
| 3721 | |
| 3722 | static MallocMeta* new_MallocMeta ( void ) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3723 | MallocMeta* md = HG_(zalloc)( "hg.new_MallocMeta.1", sizeof(MallocMeta) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3724 | tl_assert(md); |
| 3725 | return md; |
| 3726 | } |
| 3727 | static void delete_MallocMeta ( MallocMeta* md ) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3728 | HG_(free)(md); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3729 | } |
| 3730 | |
| 3731 | |
| 3732 | /* Allocate a client block and set up the metadata for it. */ |
| 3733 | |
| 3734 | static |
| 3735 | void* handle_alloc ( ThreadId tid, |
| 3736 | SizeT szB, SizeT alignB, Bool is_zeroed ) |
| 3737 | { |
| 3738 | Addr p; |
| 3739 | MallocMeta* md; |
| 3740 | |
| 3741 | tl_assert( ((SSizeT)szB) >= 0 ); |
| 3742 | p = (Addr)VG_(cli_malloc)(alignB, szB); |
| 3743 | if (!p) { |
| 3744 | return NULL; |
| 3745 | } |
| 3746 | if (is_zeroed) |
| 3747 | VG_(memset)((void*)p, 0, szB); |
| 3748 | |
| 3749 | /* Note that map_threads_lookup must succeed (cannot assert), since |
| 3750 | memory can only be allocated by currently alive threads, hence |
| 3751 | they must have an entry in map_threads. */ |
| 3752 | md = new_MallocMeta(); |
| 3753 | md->payload = p; |
| 3754 | md->szB = szB; |
| 3755 | md->where = VG_(record_ExeContext)( tid, 0 ); |
| 3756 | md->thr = map_threads_lookup( tid ); |
| 3757 | |
| 3758 | VG_(HT_add_node)( hg_mallocmeta_table, (VgHashNode*)md ); |
| 3759 | |
| 3760 | /* Tell the lower level memory wranglers. */ |
| 3761 | evh__new_mem_heap( p, szB, is_zeroed ); |
| 3762 | |
| 3763 | return (void*)p; |
| 3764 | } |
| 3765 | |
| 3766 | /* Re the checks for less-than-zero (also in hg_cli__realloc below): |
| 3767 | Cast to a signed type to catch any unexpectedly negative args. |
| 3768 | We're assuming here that the size asked for is not greater than |
| 3769 | 2^31 bytes (for 32-bit platforms) or 2^63 bytes (for 64-bit |
| 3770 | platforms). */ |
| 3771 | static void* hg_cli__malloc ( ThreadId tid, SizeT n ) { |
| 3772 | if (((SSizeT)n) < 0) return NULL; |
| 3773 | return handle_alloc ( tid, n, VG_(clo_alignment), |
| 3774 | /*is_zeroed*/False ); |
| 3775 | } |
| 3776 | static void* hg_cli____builtin_new ( ThreadId tid, SizeT n ) { |
| 3777 | if (((SSizeT)n) < 0) return NULL; |
| 3778 | return handle_alloc ( tid, n, VG_(clo_alignment), |
| 3779 | /*is_zeroed*/False ); |
| 3780 | } |
| 3781 | static void* hg_cli____builtin_vec_new ( ThreadId tid, SizeT n ) { |
| 3782 | if (((SSizeT)n) < 0) return NULL; |
| 3783 | return handle_alloc ( tid, n, VG_(clo_alignment), |
| 3784 | /*is_zeroed*/False ); |
| 3785 | } |
| 3786 | static void* hg_cli__memalign ( ThreadId tid, SizeT align, SizeT n ) { |
| 3787 | if (((SSizeT)n) < 0) return NULL; |
| 3788 | return handle_alloc ( tid, n, align, |
| 3789 | /*is_zeroed*/False ); |
| 3790 | } |
| 3791 | static void* hg_cli__calloc ( ThreadId tid, SizeT nmemb, SizeT size1 ) { |
| 3792 | if ( ((SSizeT)nmemb) < 0 || ((SSizeT)size1) < 0 ) return NULL; |
| 3793 | return handle_alloc ( tid, nmemb*size1, VG_(clo_alignment), |
| 3794 | /*is_zeroed*/True ); |
| 3795 | } |
| 3796 | |
| 3797 | |
| 3798 | /* Free a client block, including getting rid of the relevant |
| 3799 | metadata. */ |
| 3800 | |
| 3801 | static void handle_free ( ThreadId tid, void* p ) |
| 3802 | { |
| 3803 | MallocMeta *md, *old_md; |
| 3804 | SizeT szB; |
| 3805 | |
| 3806 | /* First see if we can find the metadata for 'p'. */ |
| 3807 | md = (MallocMeta*) VG_(HT_lookup)( hg_mallocmeta_table, (UWord)p ); |
| 3808 | if (!md) |
| 3809 | return; /* apparently freeing a bogus address. Oh well. */ |
| 3810 | |
| 3811 | tl_assert(md->payload == (Addr)p); |
| 3812 | szB = md->szB; |
| 3813 | |
| 3814 | /* Nuke the metadata block */ |
| 3815 | old_md = (MallocMeta*) |
| 3816 | VG_(HT_remove)( hg_mallocmeta_table, (UWord)p ); |
| 3817 | tl_assert(old_md); /* it must be present - we just found it */ |
| 3818 | tl_assert(old_md == md); |
| 3819 | tl_assert(old_md->payload == (Addr)p); |
| 3820 | |
| 3821 | VG_(cli_free)((void*)old_md->payload); |
| 3822 | delete_MallocMeta(old_md); |
| 3823 | |
| 3824 | /* Tell the lower level memory wranglers. */ |
| 3825 | evh__die_mem_heap( (Addr)p, szB ); |
| 3826 | } |
| 3827 | |
| 3828 | static void hg_cli__free ( ThreadId tid, void* p ) { |
| 3829 | handle_free(tid, p); |
| 3830 | } |
| 3831 | static void hg_cli____builtin_delete ( ThreadId tid, void* p ) { |
| 3832 | handle_free(tid, p); |
| 3833 | } |
| 3834 | static void hg_cli____builtin_vec_delete ( ThreadId tid, void* p ) { |
| 3835 | handle_free(tid, p); |
| 3836 | } |
| 3837 | |
| 3838 | |
| 3839 | static void* hg_cli__realloc ( ThreadId tid, void* payloadV, SizeT new_size ) |
| 3840 | { |
| 3841 | MallocMeta *md, *md_new, *md_tmp; |
| 3842 | SizeT i; |
| 3843 | |
| 3844 | Addr payload = (Addr)payloadV; |
| 3845 | |
| 3846 | if (((SSizeT)new_size) < 0) return NULL; |
| 3847 | |
| 3848 | md = (MallocMeta*) VG_(HT_lookup)( hg_mallocmeta_table, (UWord)payload ); |
| 3849 | if (!md) |
| 3850 | return NULL; /* apparently realloc-ing a bogus address. Oh well. */ |
| 3851 | |
| 3852 | tl_assert(md->payload == payload); |
| 3853 | |
| 3854 | if (md->szB == new_size) { |
| 3855 | /* size unchanged */ |
| 3856 | md->where = VG_(record_ExeContext)(tid, 0); |
| 3857 | return payloadV; |
| 3858 | } |
| 3859 | |
| 3860 | if (md->szB > new_size) { |
| 3861 | /* new size is smaller */ |
| 3862 | md->szB = new_size; |
| 3863 | md->where = VG_(record_ExeContext)(tid, 0); |
| 3864 | evh__die_mem_heap( md->payload + new_size, md->szB - new_size ); |
| 3865 | return payloadV; |
| 3866 | } |
| 3867 | |
| 3868 | /* else */ { |
| 3869 | /* new size is bigger */ |
| 3870 | Addr p_new = (Addr)VG_(cli_malloc)(VG_(clo_alignment), new_size); |
| 3871 | |
| 3872 | /* First half kept and copied, second half new */ |
| 3873 | // FIXME: shouldn't we use a copier which implements the |
| 3874 | // memory state machine? |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 3875 | evh__copy_mem( payload, p_new, md->szB ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3876 | evh__new_mem_heap ( p_new + md->szB, new_size - md->szB, |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 3877 | /*inited*/False ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3878 | /* FIXME: can anything funny happen here? specifically, if the |
| 3879 | old range contained a lock, then die_mem_heap will complain. |
| 3880 | Is that the correct behaviour? Not sure. */ |
| 3881 | evh__die_mem_heap( payload, md->szB ); |
| 3882 | |
| 3883 | /* Copy from old to new */ |
| 3884 | for (i = 0; i < md->szB; i++) |
| 3885 | ((UChar*)p_new)[i] = ((UChar*)payload)[i]; |
| 3886 | |
| 3887 | /* Because the metadata hash table is index by payload address, |
| 3888 | we have to get rid of the old hash table entry and make a new |
| 3889 | one. We can't just modify the existing metadata in place, |
| 3890 | because then it would (almost certainly) be in the wrong hash |
| 3891 | chain. */ |
| 3892 | md_new = new_MallocMeta(); |
| 3893 | *md_new = *md; |
| 3894 | |
| 3895 | md_tmp = VG_(HT_remove)( hg_mallocmeta_table, payload ); |
| 3896 | tl_assert(md_tmp); |
| 3897 | tl_assert(md_tmp == md); |
| 3898 | |
| 3899 | VG_(cli_free)((void*)md->payload); |
| 3900 | delete_MallocMeta(md); |
| 3901 | |
| 3902 | /* Update fields */ |
| 3903 | md_new->where = VG_(record_ExeContext)( tid, 0 ); |
| 3904 | md_new->szB = new_size; |
| 3905 | md_new->payload = p_new; |
| 3906 | md_new->thr = map_threads_lookup( tid ); |
| 3907 | |
| 3908 | /* and add */ |
| 3909 | VG_(HT_add_node)( hg_mallocmeta_table, (VgHashNode*)md_new ); |
| 3910 | |
| 3911 | return (void*)p_new; |
| 3912 | } |
| 3913 | } |
| 3914 | |
njn | 8b140de | 2009-02-17 04:31:18 +0000 | [diff] [blame] | 3915 | static SizeT hg_cli_malloc_usable_size ( ThreadId tid, void* p ) |
| 3916 | { |
| 3917 | MallocMeta *md = VG_(HT_lookup)( hg_mallocmeta_table, (UWord)p ); |
| 3918 | |
| 3919 | // There may be slop, but pretend there isn't because only the asked-for |
| 3920 | // area will have been shadowed properly. |
| 3921 | return ( md ? md->szB : 0 ); |
| 3922 | } |
| 3923 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3924 | |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3925 | /* For error creation: map 'data_addr' to a malloc'd chunk, if any. |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 3926 | Slow linear search. With a bit of hash table help if 'data_addr' |
| 3927 | is either the start of a block or up to 15 word-sized steps along |
| 3928 | from the start of a block. */ |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3929 | |
| 3930 | static inline Bool addr_is_in_MM_Chunk( MallocMeta* mm, Addr a ) |
| 3931 | { |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 3932 | /* Accept 'a' as within 'mm' if 'mm's size is zero and 'a' points |
| 3933 | right at it. */ |
| 3934 | if (UNLIKELY(mm->szB == 0 && a == mm->payload)) |
| 3935 | return True; |
| 3936 | /* else normal interval rules apply */ |
| 3937 | if (LIKELY(a < mm->payload)) return False; |
| 3938 | if (LIKELY(a >= mm->payload + mm->szB)) return False; |
| 3939 | return True; |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3940 | } |
| 3941 | |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 3942 | Bool HG_(mm_find_containing_block)( /*OUT*/ExeContext** where, |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3943 | /*OUT*/Addr* payload, |
| 3944 | /*OUT*/SizeT* szB, |
| 3945 | Addr data_addr ) |
| 3946 | { |
| 3947 | MallocMeta* mm; |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 3948 | Int i; |
| 3949 | const Int n_fast_check_words = 16; |
| 3950 | |
| 3951 | /* First, do a few fast searches on the basis that data_addr might |
| 3952 | be exactly the start of a block or up to 15 words inside. This |
| 3953 | can happen commonly via the creq |
| 3954 | _VG_USERREQ__HG_CLEAN_MEMORY_HEAPBLOCK. */ |
| 3955 | for (i = 0; i < n_fast_check_words; i++) { |
| 3956 | mm = VG_(HT_lookup)( hg_mallocmeta_table, |
| 3957 | data_addr - (UWord)(UInt)i * sizeof(UWord) ); |
| 3958 | if (UNLIKELY(mm && addr_is_in_MM_Chunk(mm, data_addr))) |
| 3959 | goto found; |
| 3960 | } |
| 3961 | |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3962 | /* Well, this totally sucks. But without using an interval tree or |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 3963 | some such, it's hard to see how to do better. We have to check |
| 3964 | every block in the entire table. */ |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3965 | VG_(HT_ResetIter)(hg_mallocmeta_table); |
| 3966 | while ( (mm = VG_(HT_Next)(hg_mallocmeta_table)) ) { |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 3967 | if (UNLIKELY(addr_is_in_MM_Chunk(mm, data_addr))) |
| 3968 | goto found; |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3969 | } |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 3970 | |
| 3971 | /* Not found. Bah. */ |
| 3972 | return False; |
| 3973 | /*NOTREACHED*/ |
| 3974 | |
| 3975 | found: |
| 3976 | tl_assert(mm); |
| 3977 | tl_assert(addr_is_in_MM_Chunk(mm, data_addr)); |
| 3978 | if (where) *where = mm->where; |
| 3979 | if (payload) *payload = mm->payload; |
| 3980 | if (szB) *szB = mm->szB; |
| 3981 | return True; |
sewardj | 095d61e | 2010-03-11 13:43:18 +0000 | [diff] [blame] | 3982 | } |
| 3983 | |
| 3984 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 3985 | /*--------------------------------------------------------------*/ |
| 3986 | /*--- Instrumentation ---*/ |
| 3987 | /*--------------------------------------------------------------*/ |
| 3988 | |
| 3989 | static void instrument_mem_access ( IRSB* bbOut, |
| 3990 | IRExpr* addr, |
| 3991 | Int szB, |
| 3992 | Bool isStore, |
| 3993 | Int hWordTy_szB ) |
| 3994 | { |
| 3995 | IRType tyAddr = Ity_INVALID; |
| 3996 | HChar* hName = NULL; |
| 3997 | void* hAddr = NULL; |
| 3998 | Int regparms = 0; |
| 3999 | IRExpr** argv = NULL; |
| 4000 | IRDirty* di = NULL; |
| 4001 | |
| 4002 | tl_assert(isIRAtom(addr)); |
| 4003 | tl_assert(hWordTy_szB == 4 || hWordTy_szB == 8); |
| 4004 | |
| 4005 | tyAddr = typeOfIRExpr( bbOut->tyenv, addr ); |
| 4006 | tl_assert(tyAddr == Ity_I32 || tyAddr == Ity_I64); |
| 4007 | |
| 4008 | /* So the effective address is in 'addr' now. */ |
| 4009 | regparms = 1; // unless stated otherwise |
| 4010 | if (isStore) { |
| 4011 | switch (szB) { |
| 4012 | case 1: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4013 | hName = "evh__mem_help_cwrite_1"; |
| 4014 | hAddr = &evh__mem_help_cwrite_1; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4015 | argv = mkIRExprVec_1( addr ); |
| 4016 | break; |
| 4017 | case 2: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4018 | hName = "evh__mem_help_cwrite_2"; |
| 4019 | hAddr = &evh__mem_help_cwrite_2; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4020 | argv = mkIRExprVec_1( addr ); |
| 4021 | break; |
| 4022 | case 4: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4023 | hName = "evh__mem_help_cwrite_4"; |
| 4024 | hAddr = &evh__mem_help_cwrite_4; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4025 | argv = mkIRExprVec_1( addr ); |
| 4026 | break; |
| 4027 | case 8: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4028 | hName = "evh__mem_help_cwrite_8"; |
| 4029 | hAddr = &evh__mem_help_cwrite_8; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4030 | argv = mkIRExprVec_1( addr ); |
| 4031 | break; |
| 4032 | default: |
| 4033 | tl_assert(szB > 8 && szB <= 512); /* stay sane */ |
| 4034 | regparms = 2; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4035 | hName = "evh__mem_help_cwrite_N"; |
| 4036 | hAddr = &evh__mem_help_cwrite_N; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4037 | argv = mkIRExprVec_2( addr, mkIRExpr_HWord( szB )); |
| 4038 | break; |
| 4039 | } |
| 4040 | } else { |
| 4041 | switch (szB) { |
| 4042 | case 1: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4043 | hName = "evh__mem_help_cread_1"; |
| 4044 | hAddr = &evh__mem_help_cread_1; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4045 | argv = mkIRExprVec_1( addr ); |
| 4046 | break; |
| 4047 | case 2: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4048 | hName = "evh__mem_help_cread_2"; |
| 4049 | hAddr = &evh__mem_help_cread_2; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4050 | argv = mkIRExprVec_1( addr ); |
| 4051 | break; |
| 4052 | case 4: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4053 | hName = "evh__mem_help_cread_4"; |
| 4054 | hAddr = &evh__mem_help_cread_4; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4055 | argv = mkIRExprVec_1( addr ); |
| 4056 | break; |
| 4057 | case 8: |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4058 | hName = "evh__mem_help_cread_8"; |
| 4059 | hAddr = &evh__mem_help_cread_8; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4060 | argv = mkIRExprVec_1( addr ); |
| 4061 | break; |
| 4062 | default: |
| 4063 | tl_assert(szB > 8 && szB <= 512); /* stay sane */ |
| 4064 | regparms = 2; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4065 | hName = "evh__mem_help_cread_N"; |
| 4066 | hAddr = &evh__mem_help_cread_N; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4067 | argv = mkIRExprVec_2( addr, mkIRExpr_HWord( szB )); |
| 4068 | break; |
| 4069 | } |
| 4070 | } |
| 4071 | |
| 4072 | /* Add the helper. */ |
| 4073 | tl_assert(hName); |
| 4074 | tl_assert(hAddr); |
| 4075 | tl_assert(argv); |
| 4076 | di = unsafeIRDirty_0_N( regparms, |
| 4077 | hName, VG_(fnptr_to_fnentry)( hAddr ), |
| 4078 | argv ); |
| 4079 | addStmtToIRSB( bbOut, IRStmt_Dirty(di) ); |
| 4080 | } |
| 4081 | |
| 4082 | |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4083 | /* Figure out if GA is a guest code address in the dynamic linker, and |
| 4084 | if so return True. Otherwise (and in case of any doubt) return |
| 4085 | False. (sidedly safe w/ False as the safe value) */ |
| 4086 | static Bool is_in_dynamic_linker_shared_object( Addr64 ga ) |
| 4087 | { |
| 4088 | DebugInfo* dinfo; |
| 4089 | const UChar* soname; |
| 4090 | if (0) return False; |
| 4091 | |
sewardj | e3f1e59 | 2009-07-31 09:41:29 +0000 | [diff] [blame] | 4092 | dinfo = VG_(find_DebugInfo)( (Addr)ga ); |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4093 | if (!dinfo) return False; |
| 4094 | |
sewardj | e3f1e59 | 2009-07-31 09:41:29 +0000 | [diff] [blame] | 4095 | soname = VG_(DebugInfo_get_soname)(dinfo); |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4096 | tl_assert(soname); |
| 4097 | if (0) VG_(printf)("%s\n", soname); |
| 4098 | |
| 4099 | # if defined(VGO_linux) |
sewardj | 651cfa4 | 2010-01-11 13:02:19 +0000 | [diff] [blame] | 4100 | if (VG_STREQ(soname, VG_U_LD_LINUX_SO_3)) return True; |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4101 | if (VG_STREQ(soname, VG_U_LD_LINUX_SO_2)) return True; |
| 4102 | if (VG_STREQ(soname, VG_U_LD_LINUX_X86_64_SO_2)) return True; |
| 4103 | if (VG_STREQ(soname, VG_U_LD64_SO_1)) return True; |
| 4104 | if (VG_STREQ(soname, VG_U_LD_SO_1)) return True; |
| 4105 | # elif defined(VGO_darwin) |
| 4106 | if (VG_STREQ(soname, VG_U_DYLD)) return True; |
| 4107 | # else |
| 4108 | # error "Unsupported OS" |
| 4109 | # endif |
| 4110 | return False; |
| 4111 | } |
| 4112 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4113 | static |
| 4114 | IRSB* hg_instrument ( VgCallbackClosure* closure, |
| 4115 | IRSB* bbIn, |
| 4116 | VexGuestLayout* layout, |
| 4117 | VexGuestExtents* vge, |
| 4118 | IRType gWordTy, IRType hWordTy ) |
| 4119 | { |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4120 | Int i; |
| 4121 | IRSB* bbOut; |
| 4122 | Addr64 cia; /* address of current insn */ |
| 4123 | IRStmt* st; |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4124 | Bool inLDSO = False; |
| 4125 | Addr64 inLDSOmask4K = 1; /* mismatches on first check */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4126 | |
| 4127 | if (gWordTy != hWordTy) { |
| 4128 | /* We don't currently support this case. */ |
| 4129 | VG_(tool_panic)("host/guest word size mismatch"); |
| 4130 | } |
| 4131 | |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4132 | if (VKI_PAGE_SIZE < 4096 || VG_(log2)(VKI_PAGE_SIZE) == -1) { |
| 4133 | VG_(tool_panic)("implausible or too-small VKI_PAGE_SIZE"); |
| 4134 | } |
| 4135 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4136 | /* Set up BB */ |
| 4137 | bbOut = emptyIRSB(); |
| 4138 | bbOut->tyenv = deepCopyIRTypeEnv(bbIn->tyenv); |
| 4139 | bbOut->next = deepCopyIRExpr(bbIn->next); |
| 4140 | bbOut->jumpkind = bbIn->jumpkind; |
| 4141 | |
| 4142 | // Copy verbatim any IR preamble preceding the first IMark |
| 4143 | i = 0; |
| 4144 | while (i < bbIn->stmts_used && bbIn->stmts[i]->tag != Ist_IMark) { |
| 4145 | addStmtToIRSB( bbOut, bbIn->stmts[i] ); |
| 4146 | i++; |
| 4147 | } |
| 4148 | |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4149 | // Get the first statement, and initial cia from it |
| 4150 | tl_assert(bbIn->stmts_used > 0); |
| 4151 | tl_assert(i < bbIn->stmts_used); |
| 4152 | st = bbIn->stmts[i]; |
| 4153 | tl_assert(Ist_IMark == st->tag); |
| 4154 | cia = st->Ist.IMark.addr; |
| 4155 | st = NULL; |
| 4156 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4157 | for (/*use current i*/; i < bbIn->stmts_used; i++) { |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4158 | st = bbIn->stmts[i]; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4159 | tl_assert(st); |
| 4160 | tl_assert(isFlatIRStmt(st)); |
| 4161 | switch (st->tag) { |
| 4162 | case Ist_NoOp: |
| 4163 | case Ist_AbiHint: |
| 4164 | case Ist_Put: |
| 4165 | case Ist_PutI: |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4166 | case Ist_Exit: |
| 4167 | /* None of these can contain any memory references. */ |
| 4168 | break; |
| 4169 | |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4170 | case Ist_IMark: |
| 4171 | /* no mem refs, but note the insn address. */ |
| 4172 | cia = st->Ist.IMark.addr; |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4173 | /* Don't instrument the dynamic linker. It generates a |
| 4174 | lot of races which we just expensively suppress, so |
| 4175 | it's pointless. |
| 4176 | |
| 4177 | Avoid flooding is_in_dynamic_linker_shared_object with |
| 4178 | requests by only checking at transitions between 4K |
| 4179 | pages. */ |
| 4180 | if ((cia & ~(Addr64)0xFFF) != inLDSOmask4K) { |
| 4181 | if (0) VG_(printf)("NEW %#lx\n", (Addr)cia); |
| 4182 | inLDSOmask4K = cia & ~(Addr64)0xFFF; |
| 4183 | inLDSO = is_in_dynamic_linker_shared_object(cia); |
| 4184 | } else { |
| 4185 | if (0) VG_(printf)("old %#lx\n", (Addr)cia); |
| 4186 | } |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4187 | break; |
| 4188 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4189 | case Ist_MBE: |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4190 | switch (st->Ist.MBE.event) { |
| 4191 | case Imbe_Fence: |
| 4192 | break; /* not interesting */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4193 | default: |
| 4194 | goto unhandled; |
| 4195 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4196 | break; |
| 4197 | |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4198 | case Ist_CAS: { |
| 4199 | /* Atomic read-modify-write cycle. Just pretend it's a |
| 4200 | read. */ |
| 4201 | IRCAS* cas = st->Ist.CAS.details; |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4202 | Bool isDCAS = cas->oldHi != IRTemp_INVALID; |
| 4203 | if (isDCAS) { |
| 4204 | tl_assert(cas->expdHi); |
| 4205 | tl_assert(cas->dataHi); |
| 4206 | } else { |
| 4207 | tl_assert(!cas->expdHi); |
| 4208 | tl_assert(!cas->dataHi); |
| 4209 | } |
| 4210 | /* Just be boring about it. */ |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4211 | if (!inLDSO) { |
| 4212 | instrument_mem_access( |
| 4213 | bbOut, |
| 4214 | cas->addr, |
| 4215 | (isDCAS ? 2 : 1) |
| 4216 | * sizeofIRType(typeOfIRExpr(bbIn->tyenv, cas->dataLo)), |
| 4217 | False/*!isStore*/, |
| 4218 | sizeofIRType(hWordTy) |
| 4219 | ); |
| 4220 | } |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4221 | break; |
| 4222 | } |
| 4223 | |
sewardj | db5907d | 2009-11-26 17:20:21 +0000 | [diff] [blame] | 4224 | case Ist_LLSC: { |
| 4225 | /* We pretend store-conditionals don't exist, viz, ignore |
| 4226 | them. Whereas load-linked's are treated the same as |
| 4227 | normal loads. */ |
| 4228 | IRType dataTy; |
| 4229 | if (st->Ist.LLSC.storedata == NULL) { |
| 4230 | /* LL */ |
| 4231 | dataTy = typeOfIRTemp(bbIn->tyenv, st->Ist.LLSC.result); |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4232 | if (!inLDSO) { |
sewardj | db5907d | 2009-11-26 17:20:21 +0000 | [diff] [blame] | 4233 | instrument_mem_access( |
| 4234 | bbOut, |
| 4235 | st->Ist.LLSC.addr, |
| 4236 | sizeofIRType(dataTy), |
| 4237 | False/*!isStore*/, |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4238 | sizeofIRType(hWordTy) |
| 4239 | ); |
| 4240 | } |
sewardj | db5907d | 2009-11-26 17:20:21 +0000 | [diff] [blame] | 4241 | } else { |
| 4242 | /* SC */ |
| 4243 | /*ignore */ |
| 4244 | } |
| 4245 | break; |
| 4246 | } |
| 4247 | |
| 4248 | case Ist_Store: |
| 4249 | /* It seems we pretend that store-conditionals don't |
| 4250 | exist, viz, just ignore them ... */ |
| 4251 | if (!inLDSO) { |
| 4252 | instrument_mem_access( |
| 4253 | bbOut, |
| 4254 | st->Ist.Store.addr, |
| 4255 | sizeofIRType(typeOfIRExpr(bbIn->tyenv, st->Ist.Store.data)), |
| 4256 | True/*isStore*/, |
| 4257 | sizeofIRType(hWordTy) |
| 4258 | ); |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4259 | } |
njn | b83caf2 | 2009-05-25 01:47:56 +0000 | [diff] [blame] | 4260 | break; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4261 | |
| 4262 | case Ist_WrTmp: { |
sewardj | 1c0ce7a | 2009-07-01 08:10:49 +0000 | [diff] [blame] | 4263 | /* ... whereas here we don't care whether a load is a |
| 4264 | vanilla one or a load-linked. */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4265 | IRExpr* data = st->Ist.WrTmp.data; |
| 4266 | if (data->tag == Iex_Load) { |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4267 | if (!inLDSO) { |
| 4268 | instrument_mem_access( |
| 4269 | bbOut, |
| 4270 | data->Iex.Load.addr, |
| 4271 | sizeofIRType(data->Iex.Load.ty), |
| 4272 | False/*!isStore*/, |
| 4273 | sizeofIRType(hWordTy) |
| 4274 | ); |
| 4275 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4276 | } |
| 4277 | break; |
| 4278 | } |
| 4279 | |
| 4280 | case Ist_Dirty: { |
| 4281 | Int dataSize; |
| 4282 | IRDirty* d = st->Ist.Dirty.details; |
| 4283 | if (d->mFx != Ifx_None) { |
| 4284 | /* This dirty helper accesses memory. Collect the |
| 4285 | details. */ |
| 4286 | tl_assert(d->mAddr != NULL); |
| 4287 | tl_assert(d->mSize != 0); |
| 4288 | dataSize = d->mSize; |
| 4289 | if (d->mFx == Ifx_Read || d->mFx == Ifx_Modify) { |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4290 | if (!inLDSO) { |
| 4291 | instrument_mem_access( |
| 4292 | bbOut, d->mAddr, dataSize, False/*!isStore*/, |
| 4293 | sizeofIRType(hWordTy) |
| 4294 | ); |
| 4295 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4296 | } |
| 4297 | if (d->mFx == Ifx_Write || d->mFx == Ifx_Modify) { |
sewardj | a0eee32 | 2009-07-31 08:46:35 +0000 | [diff] [blame] | 4298 | if (!inLDSO) { |
| 4299 | instrument_mem_access( |
| 4300 | bbOut, d->mAddr, dataSize, True/*isStore*/, |
| 4301 | sizeofIRType(hWordTy) |
| 4302 | ); |
| 4303 | } |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4304 | } |
| 4305 | } else { |
| 4306 | tl_assert(d->mAddr == NULL); |
| 4307 | tl_assert(d->mSize == 0); |
| 4308 | } |
| 4309 | break; |
| 4310 | } |
| 4311 | |
| 4312 | default: |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4313 | unhandled: |
| 4314 | ppIRStmt(st); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4315 | tl_assert(0); |
| 4316 | |
| 4317 | } /* switch (st->tag) */ |
| 4318 | |
| 4319 | addStmtToIRSB( bbOut, st ); |
| 4320 | } /* iterate over bbIn->stmts */ |
| 4321 | |
| 4322 | return bbOut; |
| 4323 | } |
| 4324 | |
| 4325 | |
| 4326 | /*----------------------------------------------------------------*/ |
| 4327 | /*--- Client requests ---*/ |
| 4328 | /*----------------------------------------------------------------*/ |
| 4329 | |
| 4330 | /* Sheesh. Yet another goddam finite map. */ |
| 4331 | static WordFM* map_pthread_t_to_Thread = NULL; /* pthread_t -> Thread* */ |
| 4332 | |
| 4333 | static void map_pthread_t_to_Thread_INIT ( void ) { |
| 4334 | if (UNLIKELY(map_pthread_t_to_Thread == NULL)) { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4335 | map_pthread_t_to_Thread = VG_(newFM)( HG_(zalloc), "hg.mpttT.1", |
| 4336 | HG_(free), NULL ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4337 | tl_assert(map_pthread_t_to_Thread != NULL); |
| 4338 | } |
| 4339 | } |
| 4340 | |
| 4341 | |
| 4342 | static |
| 4343 | Bool hg_handle_client_request ( ThreadId tid, UWord* args, UWord* ret) |
| 4344 | { |
| 4345 | if (!VG_IS_TOOL_USERREQ('H','G',args[0])) |
| 4346 | return False; |
| 4347 | |
| 4348 | /* Anything that gets past the above check is one of ours, so we |
| 4349 | should be able to handle it. */ |
| 4350 | |
| 4351 | /* default, meaningless return value, unless otherwise set */ |
| 4352 | *ret = 0; |
| 4353 | |
| 4354 | switch (args[0]) { |
| 4355 | |
| 4356 | /* --- --- User-visible client requests --- --- */ |
| 4357 | |
| 4358 | case VG_USERREQ__HG_CLEAN_MEMORY: |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4359 | if (0) VG_(printf)("VG_USERREQ__HG_CLEAN_MEMORY(%#lx,%ld)\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4360 | args[1], args[2]); |
| 4361 | /* Call die_mem to (expensively) tidy up properly, if there |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4362 | are any held locks etc in the area. Calling evh__die_mem |
| 4363 | and then evh__new_mem is a bit inefficient; probably just |
| 4364 | the latter would do. */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4365 | if (args[2] > 0) { /* length */ |
| 4366 | evh__die_mem(args[1], args[2]); |
| 4367 | /* and then set it to New */ |
| 4368 | evh__new_mem(args[1], args[2]); |
| 4369 | } |
| 4370 | break; |
| 4371 | |
sewardj | c8028ad | 2010-05-05 09:34:42 +0000 | [diff] [blame] | 4372 | case _VG_USERREQ__HG_CLEAN_MEMORY_HEAPBLOCK: { |
| 4373 | Addr payload = 0; |
| 4374 | SizeT pszB = 0; |
| 4375 | if (0) VG_(printf)("VG_USERREQ__HG_CLEAN_MEMORY_HEAPBLOCK(%#lx)\n", |
| 4376 | args[1]); |
| 4377 | if (HG_(mm_find_containing_block)(NULL, &payload, &pszB, args[1])) { |
| 4378 | if (pszB > 0) { |
| 4379 | evh__die_mem(payload, pszB); |
| 4380 | evh__new_mem(payload, pszB); |
| 4381 | } |
| 4382 | *ret = pszB; |
| 4383 | } else { |
| 4384 | *ret = (UWord)-1; |
| 4385 | } |
| 4386 | break; |
| 4387 | } |
| 4388 | |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 4389 | case _VG_USERREQ__HG_ARANGE_MAKE_UNTRACKED: |
| 4390 | if (0) VG_(printf)("HG_ARANGE_MAKE_UNTRACKED(%#lx,%ld)\n", |
| 4391 | args[1], args[2]); |
| 4392 | if (args[2] > 0) { /* length */ |
| 4393 | evh__untrack_mem(args[1], args[2]); |
| 4394 | } |
| 4395 | break; |
| 4396 | |
| 4397 | case _VG_USERREQ__HG_ARANGE_MAKE_TRACKED: |
| 4398 | if (0) VG_(printf)("HG_ARANGE_MAKE_TRACKED(%#lx,%ld)\n", |
| 4399 | args[1], args[2]); |
| 4400 | if (args[2] > 0) { /* length */ |
| 4401 | evh__new_mem(args[1], args[2]); |
| 4402 | } |
| 4403 | break; |
| 4404 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4405 | /* --- --- Client requests for Helgrind's use only --- --- */ |
| 4406 | |
| 4407 | /* Some thread is telling us its pthread_t value. Record the |
| 4408 | binding between that and the associated Thread*, so we can |
| 4409 | later find the Thread* again when notified of a join by the |
| 4410 | thread. */ |
| 4411 | case _VG_USERREQ__HG_SET_MY_PTHREAD_T: { |
| 4412 | Thread* my_thr = NULL; |
| 4413 | if (0) |
| 4414 | VG_(printf)("SET_MY_PTHREAD_T (tid %d): pthread_t = %p\n", (Int)tid, |
| 4415 | (void*)args[1]); |
| 4416 | map_pthread_t_to_Thread_INIT(); |
| 4417 | my_thr = map_threads_maybe_lookup( tid ); |
| 4418 | /* This assertion should hold because the map_threads (tid to |
| 4419 | Thread*) binding should have been made at the point of |
| 4420 | low-level creation of this thread, which should have |
| 4421 | happened prior to us getting this client request for it. |
| 4422 | That's because this client request is sent from |
| 4423 | client-world from the 'thread_wrapper' function, which |
| 4424 | only runs once the thread has been low-level created. */ |
| 4425 | tl_assert(my_thr != NULL); |
| 4426 | /* So now we know that (pthread_t)args[1] is associated with |
| 4427 | (Thread*)my_thr. Note that down. */ |
| 4428 | if (0) |
| 4429 | VG_(printf)("XXXX: bind pthread_t %p to Thread* %p\n", |
| 4430 | (void*)args[1], (void*)my_thr ); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 4431 | VG_(addToFM)( map_pthread_t_to_Thread, (Word)args[1], (Word)my_thr ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4432 | break; |
| 4433 | } |
| 4434 | |
| 4435 | case _VG_USERREQ__HG_PTH_API_ERROR: { |
| 4436 | Thread* my_thr = NULL; |
| 4437 | map_pthread_t_to_Thread_INIT(); |
| 4438 | my_thr = map_threads_maybe_lookup( tid ); |
| 4439 | tl_assert(my_thr); /* See justification above in SET_MY_PTHREAD_T */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4440 | HG_(record_error_PthAPIerror)( |
| 4441 | my_thr, (HChar*)args[1], (Word)args[2], (HChar*)args[3] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4442 | break; |
| 4443 | } |
| 4444 | |
| 4445 | /* This thread (tid) has completed a join with the quitting |
| 4446 | thread whose pthread_t is in args[1]. */ |
| 4447 | case _VG_USERREQ__HG_PTHREAD_JOIN_POST: { |
| 4448 | Thread* thr_q = NULL; /* quitter Thread* */ |
| 4449 | Bool found = False; |
| 4450 | if (0) |
| 4451 | VG_(printf)("NOTIFY_JOIN_COMPLETE (tid %d): quitter = %p\n", (Int)tid, |
| 4452 | (void*)args[1]); |
| 4453 | map_pthread_t_to_Thread_INIT(); |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 4454 | found = VG_(lookupFM)( map_pthread_t_to_Thread, |
sewardj | b5f2964 | 2007-11-16 12:02:43 +0000 | [diff] [blame] | 4455 | NULL, (Word*)&thr_q, (Word)args[1] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4456 | /* Can this fail? It would mean that our pthread_join |
| 4457 | wrapper observed a successful join on args[1] yet that |
| 4458 | thread never existed (or at least, it never lodged an |
| 4459 | entry in the mapping (via SET_MY_PTHREAD_T)). Which |
| 4460 | sounds like a bug in the threads library. */ |
| 4461 | // FIXME: get rid of this assertion; handle properly |
| 4462 | tl_assert(found); |
| 4463 | if (found) { |
| 4464 | if (0) |
| 4465 | VG_(printf)(".................... quitter Thread* = %p\n", |
| 4466 | thr_q); |
| 4467 | evh__HG_PTHREAD_JOIN_POST( tid, thr_q ); |
| 4468 | } |
| 4469 | break; |
| 4470 | } |
| 4471 | |
| 4472 | /* EXPOSITION only: by intercepting lock init events we can show |
| 4473 | the user where the lock was initialised, rather than only |
| 4474 | being able to show where it was first locked. Intercepting |
| 4475 | lock initialisations is not necessary for the basic operation |
| 4476 | of the race checker. */ |
| 4477 | case _VG_USERREQ__HG_PTHREAD_MUTEX_INIT_POST: |
| 4478 | evh__HG_PTHREAD_MUTEX_INIT_POST( tid, (void*)args[1], args[2] ); |
| 4479 | break; |
| 4480 | |
| 4481 | case _VG_USERREQ__HG_PTHREAD_MUTEX_DESTROY_PRE: |
| 4482 | evh__HG_PTHREAD_MUTEX_DESTROY_PRE( tid, (void*)args[1] ); |
| 4483 | break; |
| 4484 | |
| 4485 | case _VG_USERREQ__HG_PTHREAD_MUTEX_UNLOCK_PRE: // pth_mx_t* |
| 4486 | evh__HG_PTHREAD_MUTEX_UNLOCK_PRE( tid, (void*)args[1] ); |
| 4487 | break; |
| 4488 | |
| 4489 | case _VG_USERREQ__HG_PTHREAD_MUTEX_UNLOCK_POST: // pth_mx_t* |
| 4490 | evh__HG_PTHREAD_MUTEX_UNLOCK_POST( tid, (void*)args[1] ); |
| 4491 | break; |
| 4492 | |
| 4493 | case _VG_USERREQ__HG_PTHREAD_MUTEX_LOCK_PRE: // pth_mx_t*, Word |
| 4494 | evh__HG_PTHREAD_MUTEX_LOCK_PRE( tid, (void*)args[1], args[2] ); |
| 4495 | break; |
| 4496 | |
| 4497 | case _VG_USERREQ__HG_PTHREAD_MUTEX_LOCK_POST: // pth_mx_t* |
| 4498 | evh__HG_PTHREAD_MUTEX_LOCK_POST( tid, (void*)args[1] ); |
| 4499 | break; |
| 4500 | |
| 4501 | /* This thread is about to do pthread_cond_signal on the |
| 4502 | pthread_cond_t* in arg[1]. Ditto pthread_cond_broadcast. */ |
| 4503 | case _VG_USERREQ__HG_PTHREAD_COND_SIGNAL_PRE: |
| 4504 | case _VG_USERREQ__HG_PTHREAD_COND_BROADCAST_PRE: |
| 4505 | evh__HG_PTHREAD_COND_SIGNAL_PRE( tid, (void*)args[1] ); |
| 4506 | break; |
| 4507 | |
| 4508 | /* Entry into pthread_cond_wait, cond=arg[1], mutex=arg[2]. |
| 4509 | Returns a flag indicating whether or not the mutex is believed to be |
| 4510 | valid for this operation. */ |
| 4511 | case _VG_USERREQ__HG_PTHREAD_COND_WAIT_PRE: { |
| 4512 | Bool mutex_is_valid |
| 4513 | = evh__HG_PTHREAD_COND_WAIT_PRE( tid, (void*)args[1], |
| 4514 | (void*)args[2] ); |
| 4515 | *ret = mutex_is_valid ? 1 : 0; |
| 4516 | break; |
| 4517 | } |
| 4518 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4519 | /* cond=arg[1] */ |
| 4520 | case _VG_USERREQ__HG_PTHREAD_COND_DESTROY_PRE: |
| 4521 | evh__HG_PTHREAD_COND_DESTROY_PRE( tid, (void*)args[1] ); |
| 4522 | break; |
| 4523 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4524 | /* Thread successfully completed pthread_cond_wait, cond=arg[1], |
| 4525 | mutex=arg[2] */ |
| 4526 | case _VG_USERREQ__HG_PTHREAD_COND_WAIT_POST: |
| 4527 | evh__HG_PTHREAD_COND_WAIT_POST( tid, |
| 4528 | (void*)args[1], (void*)args[2] ); |
| 4529 | break; |
| 4530 | |
| 4531 | case _VG_USERREQ__HG_PTHREAD_RWLOCK_INIT_POST: |
| 4532 | evh__HG_PTHREAD_RWLOCK_INIT_POST( tid, (void*)args[1] ); |
| 4533 | break; |
| 4534 | |
| 4535 | case _VG_USERREQ__HG_PTHREAD_RWLOCK_DESTROY_PRE: |
| 4536 | evh__HG_PTHREAD_RWLOCK_DESTROY_PRE( tid, (void*)args[1] ); |
| 4537 | break; |
| 4538 | |
sewardj | 789c3c5 | 2008-02-25 12:10:07 +0000 | [diff] [blame] | 4539 | /* rwlock=arg[1], isW=arg[2], isTryLock=arg[3] */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4540 | case _VG_USERREQ__HG_PTHREAD_RWLOCK_LOCK_PRE: |
sewardj | 789c3c5 | 2008-02-25 12:10:07 +0000 | [diff] [blame] | 4541 | evh__HG_PTHREAD_RWLOCK_LOCK_PRE( tid, (void*)args[1], |
| 4542 | args[2], args[3] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4543 | break; |
| 4544 | |
| 4545 | /* rwlock=arg[1], isW=arg[2] */ |
| 4546 | case _VG_USERREQ__HG_PTHREAD_RWLOCK_LOCK_POST: |
| 4547 | evh__HG_PTHREAD_RWLOCK_LOCK_POST( tid, (void*)args[1], args[2] ); |
| 4548 | break; |
| 4549 | |
| 4550 | case _VG_USERREQ__HG_PTHREAD_RWLOCK_UNLOCK_PRE: |
| 4551 | evh__HG_PTHREAD_RWLOCK_UNLOCK_PRE( tid, (void*)args[1] ); |
| 4552 | break; |
| 4553 | |
| 4554 | case _VG_USERREQ__HG_PTHREAD_RWLOCK_UNLOCK_POST: |
| 4555 | evh__HG_PTHREAD_RWLOCK_UNLOCK_POST( tid, (void*)args[1] ); |
| 4556 | break; |
| 4557 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4558 | case _VG_USERREQ__HG_POSIX_SEM_INIT_POST: /* sem_t*, unsigned long */ |
| 4559 | evh__HG_POSIX_SEM_INIT_POST( tid, (void*)args[1], args[2] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4560 | break; |
| 4561 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4562 | case _VG_USERREQ__HG_POSIX_SEM_DESTROY_PRE: /* sem_t* */ |
| 4563 | evh__HG_POSIX_SEM_DESTROY_PRE( tid, (void*)args[1] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4564 | break; |
| 4565 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4566 | case _VG_USERREQ__HG_POSIX_SEM_POST_PRE: /* sem_t* */ |
| 4567 | evh__HG_POSIX_SEM_POST_PRE( tid, (void*)args[1] ); |
| 4568 | break; |
| 4569 | |
| 4570 | case _VG_USERREQ__HG_POSIX_SEM_WAIT_POST: /* sem_t* */ |
| 4571 | evh__HG_POSIX_SEM_WAIT_POST( tid, (void*)args[1] ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4572 | break; |
| 4573 | |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 4574 | case _VG_USERREQ__HG_PTHREAD_BARRIER_INIT_PRE: |
sewardj | 406bac8 | 2010-03-03 23:03:40 +0000 | [diff] [blame] | 4575 | /* pth_bar_t*, ulong count, ulong resizable */ |
| 4576 | evh__HG_PTHREAD_BARRIER_INIT_PRE( tid, (void*)args[1], |
| 4577 | args[2], args[3] ); |
| 4578 | break; |
| 4579 | |
| 4580 | case _VG_USERREQ__HG_PTHREAD_BARRIER_RESIZE_PRE: |
| 4581 | /* pth_bar_t*, ulong newcount */ |
| 4582 | evh__HG_PTHREAD_BARRIER_RESIZE_PRE ( tid, (void*)args[1], |
| 4583 | args[2] ); |
sewardj | 9f569b7 | 2008-11-13 13:33:09 +0000 | [diff] [blame] | 4584 | break; |
| 4585 | |
| 4586 | case _VG_USERREQ__HG_PTHREAD_BARRIER_WAIT_PRE: |
| 4587 | /* pth_bar_t* */ |
| 4588 | evh__HG_PTHREAD_BARRIER_WAIT_PRE( tid, (void*)args[1] ); |
| 4589 | break; |
| 4590 | |
| 4591 | case _VG_USERREQ__HG_PTHREAD_BARRIER_DESTROY_PRE: |
| 4592 | /* pth_bar_t* */ |
| 4593 | evh__HG_PTHREAD_BARRIER_DESTROY_PRE( tid, (void*)args[1] ); |
| 4594 | break; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4595 | |
sewardj | 5a644da | 2009-08-11 10:35:58 +0000 | [diff] [blame] | 4596 | case _VG_USERREQ__HG_PTHREAD_SPIN_INIT_OR_UNLOCK_PRE: |
| 4597 | /* pth_spinlock_t* */ |
| 4598 | evh__HG_PTHREAD_SPIN_INIT_OR_UNLOCK_PRE( tid, (void*)args[1] ); |
| 4599 | break; |
| 4600 | |
| 4601 | case _VG_USERREQ__HG_PTHREAD_SPIN_INIT_OR_UNLOCK_POST: |
| 4602 | /* pth_spinlock_t* */ |
| 4603 | evh__HG_PTHREAD_SPIN_INIT_OR_UNLOCK_POST( tid, (void*)args[1] ); |
| 4604 | break; |
| 4605 | |
| 4606 | case _VG_USERREQ__HG_PTHREAD_SPIN_LOCK_PRE: |
| 4607 | /* pth_spinlock_t*, Word */ |
| 4608 | evh__HG_PTHREAD_SPIN_LOCK_PRE( tid, (void*)args[1], args[2] ); |
| 4609 | break; |
| 4610 | |
| 4611 | case _VG_USERREQ__HG_PTHREAD_SPIN_LOCK_POST: |
| 4612 | /* pth_spinlock_t* */ |
| 4613 | evh__HG_PTHREAD_SPIN_LOCK_POST( tid, (void*)args[1] ); |
| 4614 | break; |
| 4615 | |
| 4616 | case _VG_USERREQ__HG_PTHREAD_SPIN_DESTROY_PRE: |
| 4617 | /* pth_spinlock_t* */ |
| 4618 | evh__HG_PTHREAD_SPIN_DESTROY_PRE( tid, (void*)args[1] ); |
| 4619 | break; |
| 4620 | |
sewardj | ed2e72e | 2009-08-14 11:08:24 +0000 | [diff] [blame] | 4621 | case _VG_USERREQ__HG_CLIENTREQ_UNIMP: { |
| 4622 | /* char* who */ |
| 4623 | HChar* who = (HChar*)args[1]; |
| 4624 | HChar buf[50 + 50]; |
| 4625 | Thread* thr = map_threads_maybe_lookup( tid ); |
| 4626 | tl_assert( thr ); /* I must be mapped */ |
| 4627 | tl_assert( who ); |
| 4628 | tl_assert( VG_(strlen)(who) <= 50 ); |
| 4629 | VG_(sprintf)(buf, "Unimplemented client request macro \"%s\"", who ); |
| 4630 | /* record_error_Misc strdup's buf, so this is safe: */ |
| 4631 | HG_(record_error_Misc)( thr, buf ); |
| 4632 | break; |
| 4633 | } |
| 4634 | |
| 4635 | case _VG_USERREQ__HG_USERSO_SEND_PRE: |
| 4636 | /* UWord arbitrary-SO-tag */ |
| 4637 | evh__HG_USERSO_SEND_PRE( tid, args[1] ); |
| 4638 | break; |
| 4639 | |
| 4640 | case _VG_USERREQ__HG_USERSO_RECV_POST: |
| 4641 | /* UWord arbitrary-SO-tag */ |
| 4642 | evh__HG_USERSO_RECV_POST( tid, args[1] ); |
| 4643 | break; |
| 4644 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4645 | default: |
| 4646 | /* Unhandled Helgrind client request! */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4647 | tl_assert2(0, "unhandled Helgrind client request 0x%lx", |
| 4648 | args[0]); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4649 | } |
| 4650 | |
| 4651 | return True; |
| 4652 | } |
| 4653 | |
| 4654 | |
| 4655 | /*----------------------------------------------------------------*/ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4656 | /*--- Setup ---*/ |
| 4657 | /*----------------------------------------------------------------*/ |
| 4658 | |
| 4659 | static Bool hg_process_cmd_line_option ( Char* arg ) |
| 4660 | { |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 4661 | Char* tmp_str; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4662 | |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 4663 | if VG_BOOL_CLO(arg, "--track-lockorders", |
| 4664 | HG_(clo_track_lockorders)) {} |
| 4665 | else if VG_BOOL_CLO(arg, "--cmp-race-err-addrs", |
| 4666 | HG_(clo_cmp_race_err_addrs)) {} |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4667 | |
| 4668 | else if VG_XACT_CLO(arg, "--history-level=none", |
| 4669 | HG_(clo_history_level), 0); |
sewardj | f386139 | 2009-08-02 10:16:03 +0000 | [diff] [blame] | 4670 | else if VG_XACT_CLO(arg, "--history-level=approx", |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4671 | HG_(clo_history_level), 1); |
| 4672 | else if VG_XACT_CLO(arg, "--history-level=full", |
| 4673 | HG_(clo_history_level), 2); |
sewardj | 849b0ed | 2008-12-21 10:43:10 +0000 | [diff] [blame] | 4674 | |
sewardj | f585e48 | 2009-08-16 22:52:29 +0000 | [diff] [blame] | 4675 | /* If you change the 10k/30mill limits, remember to also change |
sewardj | 849b0ed | 2008-12-21 10:43:10 +0000 | [diff] [blame] | 4676 | them in assertions at the top of event_map_maybe_GC. */ |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 4677 | else if VG_BINT_CLO(arg, "--conflict-cache-size", |
sewardj | f585e48 | 2009-08-16 22:52:29 +0000 | [diff] [blame] | 4678 | HG_(clo_conflict_cache_size), 10*1000, 30*1000*1000) {} |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4679 | |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4680 | /* "stuvwx" --> stuvwx (binary) */ |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 4681 | else if VG_STR_CLO(arg, "--hg-sanity-flags", tmp_str) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4682 | Int j; |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4683 | |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 4684 | if (6 != VG_(strlen)(tmp_str)) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4685 | VG_(message)(Vg_UserMsg, |
sewardj | 2411849 | 2009-07-15 14:50:02 +0000 | [diff] [blame] | 4686 | "--hg-sanity-flags argument must have 6 digits\n"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4687 | return False; |
| 4688 | } |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4689 | for (j = 0; j < 6; j++) { |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 4690 | if ('0' == tmp_str[j]) { /* do nothing */ } |
| 4691 | else if ('1' == tmp_str[j]) HG_(clo_sanity_flags) |= (1 << (6-1-j)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4692 | else { |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4693 | VG_(message)(Vg_UserMsg, "--hg-sanity-flags argument can " |
sewardj | 2411849 | 2009-07-15 14:50:02 +0000 | [diff] [blame] | 4694 | "only contain 0s and 1s\n"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4695 | return False; |
| 4696 | } |
| 4697 | } |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4698 | if (0) VG_(printf)("XXX sanity flags: 0x%lx\n", HG_(clo_sanity_flags)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4699 | } |
| 4700 | |
| 4701 | else |
| 4702 | return VG_(replacement_malloc_process_cmd_line_option)(arg); |
| 4703 | |
| 4704 | return True; |
| 4705 | } |
| 4706 | |
| 4707 | static void hg_print_usage ( void ) |
| 4708 | { |
| 4709 | VG_(printf)( |
sewardj | 849b0ed | 2008-12-21 10:43:10 +0000 | [diff] [blame] | 4710 | " --track-lockorders=no|yes show lock ordering errors? [yes]\n" |
njn | f6e8ca9 | 2009-08-07 02:18:00 +0000 | [diff] [blame] | 4711 | " --history-level=none|approx|full [full]\n" |
sewardj | f386139 | 2009-08-02 10:16:03 +0000 | [diff] [blame] | 4712 | " full: show both stack traces for a data race (can be very slow)\n" |
| 4713 | " approx: full trace for one thread, approx for the other (faster)\n" |
| 4714 | " none: only show trace for one thread in a race (fastest)\n" |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4715 | " --conflict-cache-size=N size of 'full' history cache [1000000]\n" |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4716 | ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4717 | } |
| 4718 | |
| 4719 | static void hg_print_debug_usage ( void ) |
| 4720 | { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4721 | VG_(printf)(" --cmp-race-err-addrs=no|yes are data addresses in " |
| 4722 | "race errors significant? [no]\n"); |
sewardj | 849b0ed | 2008-12-21 10:43:10 +0000 | [diff] [blame] | 4723 | VG_(printf)(" --hg-sanity-flags=<XXXXXX> sanity check " |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4724 | " at events (X = 0|1) [000000]\n"); |
| 4725 | VG_(printf)(" --hg-sanity-flags values:\n"); |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4726 | VG_(printf)(" 010000 after changes to " |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4727 | "lock-order-acquisition-graph\n"); |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4728 | VG_(printf)(" 001000 at memory accesses (NB: not currently used)\n"); |
| 4729 | VG_(printf)(" 000100 at mem permission setting for " |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4730 | "ranges >= %d bytes\n", SCE_BIGRANGE_T); |
sewardj | 11e352f | 2007-11-30 11:11:02 +0000 | [diff] [blame] | 4731 | VG_(printf)(" 000010 at lock/unlock events\n"); |
| 4732 | VG_(printf)(" 000001 at thread create/join events\n"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4733 | } |
| 4734 | |
| 4735 | static void hg_post_clo_init ( void ) |
| 4736 | { |
| 4737 | } |
| 4738 | |
| 4739 | static void hg_fini ( Int exitcode ) |
| 4740 | { |
sewardj | 2d9e874 | 2009-08-07 15:46:56 +0000 | [diff] [blame] | 4741 | if (VG_(clo_verbosity) == 1 && !VG_(clo_xml)) { |
| 4742 | VG_(message)(Vg_UserMsg, |
| 4743 | "For counts of detected and suppressed errors, " |
| 4744 | "rerun with: -v\n"); |
| 4745 | } |
| 4746 | |
| 4747 | if (VG_(clo_verbosity) == 1 && !VG_(clo_xml) |
| 4748 | && HG_(clo_history_level) >= 2) { |
| 4749 | VG_(umsg)( |
| 4750 | "Use --history-level=approx or =none to gain increased speed, at\n" ); |
| 4751 | VG_(umsg)( |
| 4752 | "the cost of reduced accuracy of conflicting-access information\n"); |
| 4753 | } |
| 4754 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4755 | if (SHOW_DATA_STRUCTURES) |
| 4756 | pp_everything( PP_ALL, "SK_(fini)" ); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4757 | if (HG_(clo_sanity_flags)) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4758 | all__sanity_check("SK_(fini)"); |
| 4759 | |
sewardj | 2d9e874 | 2009-08-07 15:46:56 +0000 | [diff] [blame] | 4760 | if (VG_(clo_stats)) { |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4761 | |
| 4762 | if (1) { |
| 4763 | VG_(printf)("\n"); |
| 4764 | HG_(ppWSUstats)( univ_tsets, "univ_tsets" ); |
| 4765 | VG_(printf)("\n"); |
| 4766 | HG_(ppWSUstats)( univ_lsets, "univ_lsets" ); |
| 4767 | VG_(printf)("\n"); |
| 4768 | HG_(ppWSUstats)( univ_laog, "univ_laog" ); |
| 4769 | } |
| 4770 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4771 | //zz VG_(printf)("\n"); |
| 4772 | //zz VG_(printf)(" hbefore: %'10lu queries\n", stats__hbefore_queries); |
| 4773 | //zz VG_(printf)(" hbefore: %'10lu cache 0 hits\n", stats__hbefore_cache0s); |
| 4774 | //zz VG_(printf)(" hbefore: %'10lu cache > 0 hits\n", stats__hbefore_cacheNs); |
| 4775 | //zz VG_(printf)(" hbefore: %'10lu graph searches\n", stats__hbefore_gsearches); |
| 4776 | //zz VG_(printf)(" hbefore: %'10lu of which slow\n", |
| 4777 | //zz stats__hbefore_gsearches - stats__hbefore_gsearchFs); |
| 4778 | //zz VG_(printf)(" hbefore: %'10lu stack high water mark\n", |
| 4779 | //zz stats__hbefore_stk_hwm); |
| 4780 | //zz VG_(printf)(" hbefore: %'10lu cache invals\n", stats__hbefore_invals); |
| 4781 | //zz VG_(printf)(" hbefore: %'10lu probes\n", stats__hbefore_probes); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4782 | |
| 4783 | VG_(printf)("\n"); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4784 | VG_(printf)(" locksets: %'8d unique lock sets\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4785 | (Int)HG_(cardinalityWSU)( univ_lsets )); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4786 | VG_(printf)(" threadsets: %'8d unique thread sets\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4787 | (Int)HG_(cardinalityWSU)( univ_tsets )); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4788 | VG_(printf)(" univ_laog: %'8d unique lock sets\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4789 | (Int)HG_(cardinalityWSU)( univ_laog )); |
| 4790 | |
sewardj | d52392d | 2008-11-08 20:36:26 +0000 | [diff] [blame] | 4791 | //VG_(printf)("L(ast)L(ock) map: %'8lu inserts (%d map size)\n", |
| 4792 | // stats__ga_LL_adds, |
| 4793 | // (Int)(ga_to_lastlock ? VG_(sizeFM)( ga_to_lastlock ) : 0) ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4794 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4795 | VG_(printf)(" LockN-to-P map: %'8llu queries (%llu map size)\n", |
| 4796 | HG_(stats__LockN_to_P_queries), |
| 4797 | HG_(stats__LockN_to_P_get_map_size)() ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4798 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4799 | VG_(printf)("string table map: %'8llu queries (%llu map size)\n", |
| 4800 | HG_(stats__string_table_queries), |
| 4801 | HG_(stats__string_table_get_map_size)() ); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4802 | VG_(printf)(" LAOG: %'8d map size\n", |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 4803 | (Int)(laog ? VG_(sizeFM)( laog ) : 0)); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4804 | VG_(printf)(" LAOG exposition: %'8d map size\n", |
sewardj | 896f6f9 | 2008-08-19 08:38:52 +0000 | [diff] [blame] | 4805 | (Int)(laog_exposition ? VG_(sizeFM)( laog_exposition ) : 0)); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4806 | VG_(printf)(" locks: %'8lu acquires, " |
| 4807 | "%'lu releases\n", |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4808 | stats__lockN_acquires, |
| 4809 | stats__lockN_releases |
| 4810 | ); |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 4811 | VG_(printf)(" sanity checks: %'8lu\n", stats__sanity_checks); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4812 | |
| 4813 | VG_(printf)("\n"); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4814 | libhb_shutdown(True); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4815 | } |
| 4816 | } |
| 4817 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4818 | /* FIXME: move these somewhere sane */ |
| 4819 | |
| 4820 | static |
| 4821 | void for_libhb__get_stacktrace ( Thr* hbt, Addr* frames, UWord nRequest ) |
| 4822 | { |
| 4823 | Thread* thr; |
| 4824 | ThreadId tid; |
| 4825 | UWord nActual; |
| 4826 | tl_assert(hbt); |
| 4827 | thr = libhb_get_Thr_opaque( hbt ); |
| 4828 | tl_assert(thr); |
| 4829 | tid = map_threads_maybe_reverse_lookup_SLOW(thr); |
| 4830 | nActual = (UWord)VG_(get_StackTrace)( tid, frames, (UInt)nRequest, |
| 4831 | NULL, NULL, 0 ); |
| 4832 | tl_assert(nActual <= nRequest); |
| 4833 | for (; nActual < nRequest; nActual++) |
| 4834 | frames[nActual] = 0; |
| 4835 | } |
| 4836 | |
| 4837 | static |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4838 | ExeContext* for_libhb__get_EC ( Thr* hbt ) |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4839 | { |
| 4840 | Thread* thr; |
| 4841 | ThreadId tid; |
| 4842 | ExeContext* ec; |
| 4843 | tl_assert(hbt); |
| 4844 | thr = libhb_get_Thr_opaque( hbt ); |
| 4845 | tl_assert(thr); |
| 4846 | tid = map_threads_maybe_reverse_lookup_SLOW(thr); |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4847 | /* this will assert if tid is invalid */ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4848 | ec = VG_(record_ExeContext)( tid, 0 ); |
sewardj | d52392d | 2008-11-08 20:36:26 +0000 | [diff] [blame] | 4849 | return ec; |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4850 | } |
| 4851 | |
| 4852 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4853 | static void hg_pre_clo_init ( void ) |
| 4854 | { |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4855 | Thr* hbthr_root; |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 4856 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4857 | VG_(details_name) ("Helgrind"); |
| 4858 | VG_(details_version) (NULL); |
| 4859 | VG_(details_description) ("a thread error detector"); |
| 4860 | VG_(details_copyright_author)( |
sewardj | 9eecbbb | 2010-05-03 21:37:12 +0000 | [diff] [blame] | 4861 | "Copyright (C) 2007-2010, and GNU GPL'd, by OpenWorks LLP et al."); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4862 | VG_(details_bug_reports_to) (VG_BUGS_TO); |
| 4863 | VG_(details_avg_translation_sizeB) ( 200 ); |
| 4864 | |
| 4865 | VG_(basic_tool_funcs) (hg_post_clo_init, |
| 4866 | hg_instrument, |
| 4867 | hg_fini); |
| 4868 | |
| 4869 | VG_(needs_core_errors) (); |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4870 | VG_(needs_tool_errors) (HG_(eq_Error), |
sewardj | 2411849 | 2009-07-15 14:50:02 +0000 | [diff] [blame] | 4871 | HG_(before_pp_Error), |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4872 | HG_(pp_Error), |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4873 | False,/*show TIDs for errors*/ |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4874 | HG_(update_extra), |
| 4875 | HG_(recognised_suppression), |
| 4876 | HG_(read_extra_suppression_info), |
| 4877 | HG_(error_matches_suppression), |
| 4878 | HG_(get_error_name), |
sewardj | 588adef | 2009-08-15 22:41:51 +0000 | [diff] [blame] | 4879 | HG_(get_extra_suppression_info)); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4880 | |
sewardj | 2411849 | 2009-07-15 14:50:02 +0000 | [diff] [blame] | 4881 | VG_(needs_xml_output) (); |
| 4882 | |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4883 | VG_(needs_command_line_options)(hg_process_cmd_line_option, |
| 4884 | hg_print_usage, |
| 4885 | hg_print_debug_usage); |
| 4886 | VG_(needs_client_requests) (hg_handle_client_request); |
| 4887 | |
| 4888 | // FIXME? |
| 4889 | //VG_(needs_sanity_checks) (hg_cheap_sanity_check, |
| 4890 | // hg_expensive_sanity_check); |
| 4891 | |
| 4892 | VG_(needs_malloc_replacement) (hg_cli__malloc, |
| 4893 | hg_cli____builtin_new, |
| 4894 | hg_cli____builtin_vec_new, |
| 4895 | hg_cli__memalign, |
| 4896 | hg_cli__calloc, |
| 4897 | hg_cli__free, |
| 4898 | hg_cli____builtin_delete, |
| 4899 | hg_cli____builtin_vec_delete, |
| 4900 | hg_cli__realloc, |
njn | 8b140de | 2009-02-17 04:31:18 +0000 | [diff] [blame] | 4901 | hg_cli_malloc_usable_size, |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4902 | HG_CLI__MALLOC_REDZONE_SZB ); |
| 4903 | |
sewardj | 849b0ed | 2008-12-21 10:43:10 +0000 | [diff] [blame] | 4904 | /* 21 Dec 08: disabled this; it mostly causes H to start more |
| 4905 | slowly and use significantly more memory, without very often |
| 4906 | providing useful results. The user can request to load this |
| 4907 | information manually with --read-var-info=yes. */ |
| 4908 | if (0) VG_(needs_var_info)(); /* optional */ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4909 | |
| 4910 | VG_(track_new_mem_startup) ( evh__new_mem_w_perms ); |
sewardj | 7cf4e6b | 2008-05-01 20:24:26 +0000 | [diff] [blame] | 4911 | VG_(track_new_mem_stack_signal)( evh__new_mem_w_tid ); |
| 4912 | VG_(track_new_mem_brk) ( evh__new_mem_w_tid ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4913 | VG_(track_new_mem_mmap) ( evh__new_mem_w_perms ); |
sewardj | 1f77fec | 2010-04-12 19:51:04 +0000 | [diff] [blame] | 4914 | VG_(track_new_mem_stack) ( evh__new_mem_stack ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4915 | |
| 4916 | // FIXME: surely this isn't thread-aware |
sewardj | 23f1200 | 2009-07-24 08:45:08 +0000 | [diff] [blame] | 4917 | VG_(track_copy_mem_remap) ( evh__copy_mem ); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4918 | |
| 4919 | VG_(track_change_mem_mprotect) ( evh__set_perms ); |
| 4920 | |
| 4921 | VG_(track_die_mem_stack_signal)( evh__die_mem ); |
| 4922 | VG_(track_die_mem_brk) ( evh__die_mem ); |
| 4923 | VG_(track_die_mem_munmap) ( evh__die_mem ); |
| 4924 | VG_(track_die_mem_stack) ( evh__die_mem ); |
| 4925 | |
| 4926 | // FIXME: what is this for? |
| 4927 | VG_(track_ban_mem_stack) (NULL); |
| 4928 | |
| 4929 | VG_(track_pre_mem_read) ( evh__pre_mem_read ); |
| 4930 | VG_(track_pre_mem_read_asciiz) ( evh__pre_mem_read_asciiz ); |
| 4931 | VG_(track_pre_mem_write) ( evh__pre_mem_write ); |
| 4932 | VG_(track_post_mem_write) (NULL); |
| 4933 | |
| 4934 | ///////////////// |
| 4935 | |
| 4936 | VG_(track_pre_thread_ll_create)( evh__pre_thread_ll_create ); |
| 4937 | VG_(track_pre_thread_ll_exit) ( evh__pre_thread_ll_exit ); |
| 4938 | |
| 4939 | VG_(track_start_client_code)( evh__start_client_code ); |
| 4940 | VG_(track_stop_client_code)( evh__stop_client_code ); |
| 4941 | |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4942 | ///////////////////////////////////////////// |
| 4943 | hbthr_root = libhb_init( for_libhb__get_stacktrace, |
sewardj | f98e1c0 | 2008-10-25 16:22:41 +0000 | [diff] [blame] | 4944 | for_libhb__get_EC ); |
| 4945 | ///////////////////////////////////////////// |
| 4946 | |
| 4947 | initialise_data_structures(hbthr_root); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4948 | |
| 4949 | /* Ensure that requirements for "dodgy C-as-C++ style inheritance" |
| 4950 | as described in comments at the top of pub_tool_hashtable.h, are |
| 4951 | met. Blargh. */ |
| 4952 | tl_assert( sizeof(void*) == sizeof(struct _MallocMeta*) ); |
| 4953 | tl_assert( sizeof(UWord) == sizeof(Addr) ); |
| 4954 | hg_mallocmeta_table |
| 4955 | = VG_(HT_construct)( "hg_malloc_metadata_table" ); |
| 4956 | |
sewardj | 61bc2c5 | 2011-02-09 10:34:00 +0000 | [diff] [blame] | 4957 | // add a callback to clean up on (threaded) fork. |
| 4958 | VG_(atfork)(NULL/*pre*/, NULL/*parent*/, evh__atfork_child/*child*/); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 4959 | } |
| 4960 | |
| 4961 | VG_DETERMINE_INTERFACE_VERSION(hg_pre_clo_init) |
| 4962 | |
| 4963 | /*--------------------------------------------------------------------*/ |
| 4964 | /*--- end hg_main.c ---*/ |
| 4965 | /*--------------------------------------------------------------------*/ |