cmodelint.cc

   1 #include <stdio.h>
   2 #include "model.h"
   3 #include "execution.h"
   4 #include "action.h"
   5 #include "cmodelint.h"
   6 #include "snapshot-interface.h"
   7 #include "threads-model.h"
   8
   9 memory_order orders[6] = {
  10         memory_order_relaxed, memory_order_consume, memory_order_acquire,
  11         memory_order_release, memory_order_acq_rel, memory_order_seq_cst
  12 };
  13
  14 static void ensureModel(ModelAction * action) {
  15         if (!modelchecker_started) {
  16                 if (!model) {
  17                         snapshot_system_init(10000, 1024, 1024, 40000);
  18                         model = new ModelChecker();
  19                 }
  20                 model->get_execution()->check_current_action(action);
  21         } else {
  22                 model->switch_to_master(action);
  23         }
  24 }
  25
  26 static uint64_t ensureModelValue(ModelAction * action) {
  27         if (!modelchecker_started) {
  28                 if (!model) {
  29                         snapshot_system_init(10000, 1024, 1024, 40000);
  30                         model = new ModelChecker();
  31                 }
  32                 model->get_execution()->check_current_action(action);
  33                 return thread_current()->get_return_value();
  34         } else {
  35                 return model->switch_to_master(action);
  36         }
  37 }
  38
  39 /** Performs a read action.*/
  40 uint64_t model_read_action(void * obj, memory_order ord) {
  41         return model->switch_to_master(new ModelAction(ATOMIC_READ, ord, obj));
  42 }
  43
  44 /** Performs a write action.*/
  45 void model_write_action(void * obj, memory_order ord, uint64_t val) {
  46         model->switch_to_master(new ModelAction(ATOMIC_WRITE, ord, obj, val));
  47 }
  48
  49 /** Performs an init action. */
  50 void model_init_action(void * obj, uint64_t val) {
  51         model->switch_to_master(new ModelAction(ATOMIC_INIT, memory_order_relaxed, obj, val));
  52 }
  53
  54 /**
  55  * Performs the read part of a RMW action. The next action must either be the
  56  * write part of the RMW action or an explicit close out of the RMW action w/o
  57  * a write.
  58  */
  59 uint64_t model_rmwr_action(void *obj, memory_order ord) {
  60         return model->switch_to_master(new ModelAction(ATOMIC_RMWR, ord, obj));
  61 }
  62
  63 /**
  64  * Performs the read part of a RMW CAS action. The next action must
  65  * either be the write part of the RMW action or an explicit close out
  66  * of the RMW action w/o a write.
  67  */
  68 uint64_t model_rmwrcas_action(void *obj, memory_order ord, uint64_t oldval, int size) {
  69         return model->switch_to_master(new ModelAction(ATOMIC_RMWRCAS, ord, obj, oldval, size));
  70 }
  71
  72
  73 /** Performs the write part of a RMW action. */
  74 void model_rmw_action(void *obj, memory_order ord, uint64_t val) {
  75         model->switch_to_master(new ModelAction(ATOMIC_RMW, ord, obj, val));
  76 }
  77
  78 /** Closes out a RMW action without doing a write. */
  79 void model_rmwc_action(void *obj, memory_order ord) {
  80         model->switch_to_master(new ModelAction(ATOMIC_RMWC, ord, obj));
  81 }
  82
  83 /** Issues a fence operation. */
  84 void model_fence_action(memory_order ord) {
  85         model->switch_to_master(new ModelAction(ATOMIC_FENCE, ord, FENCE_LOCATION));
  86 }
  87
  88 /* ---  helper functions --- */
  89 uint64_t model_rmwrcas_action_helper(void *obj, int atomic_index, uint64_t oldval, int size, const char *position) {
  90         return model->switch_to_master(
  91                 new ModelAction(ATOMIC_RMWRCAS, position, orders[atomic_index], obj)
  92                 );
  93 }
  94
  95 uint64_t model_rmwr_action_helper(void *obj, int atomic_index, const char *position) {
  96         return model->switch_to_master(
  97                 new ModelAction(ATOMIC_RMWR, position, orders[atomic_index], obj)
  98                 );
  99 }
 100
 101 void model_rmw_action_helper(void *obj, uint64_t val, int atomic_index, const char * position) {
 102         model->switch_to_master(
 103                 new ModelAction(ATOMIC_RMW, position, orders[atomic_index], obj, val)
 104                 );
 105 }
 106
 107 void model_rmwc_action_helper(void *obj, int atomic_index, const char *position) {
 108         model->switch_to_master(
 109                 new ModelAction(ATOMIC_RMWC, position, orders[atomic_index], obj)
 110                 );
 111 }
 112
 113 // cds atomic inits
 114 void cds_atomic_init8(void * obj, uint8_t val, const char * position) {
 115         ensureModel(
 116                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)
 117                 );
 118 }
 119 void cds_atomic_init16(void * obj, uint16_t val, const char * position) {
 120         ensureModel(
 121                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)
 122                 );
 123 }
 124 void cds_atomic_init32(void * obj, uint32_t val, const char * position) {
 125         ensureModel(
 126                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)
 127                 );
 128 }
 129 void cds_atomic_init64(void * obj, uint64_t val, const char * position) {
 130         ensureModel(
 131                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, val)
 132                 );
 133 }
 134
 135
 136 // cds atomic loads
 137 uint8_t cds_atomic_load8(void * obj, int atomic_index, const char * position) {
 138         return (uint8_t) ensureModelValue(
 139                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj));
 140 }
 141 uint16_t cds_atomic_load16(void * obj, int atomic_index, const char * position) {
 142         return (uint16_t) ensureModelValue(
 143                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj));
 144 }
 145 uint32_t cds_atomic_load32(void * obj, int atomic_index, const char * position) {
 146         return (uint32_t) ensureModelValue(
 147                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj)
 148                 );
 149 }
 150 uint64_t cds_atomic_load64(void * obj, int atomic_index, const char * position) {
 151         return ensureModelValue(
 152                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj));
 153 }
 154
 155 // cds atomic stores
 156 void cds_atomic_store8(void * obj, uint8_t val, int atomic_index, const char * position) {
 157         ensureModel(
 158                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)
 159                 );
 160 }
 161 void cds_atomic_store16(void * obj, uint16_t val, int atomic_index, const char * position) {
 162         ensureModel(
 163                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)
 164                 );
 165 }
 166 void cds_atomic_store32(void * obj, uint32_t val, int atomic_index, const char * position) {
 167         ensureModel(
 168                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)
 169                 );
 170 }
 171 void cds_atomic_store64(void * obj, uint64_t val, int atomic_index, const char * position) {
 172         ensureModel(
 173                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, val)
 174                 );
 175 }
 176
 177 #define _ATOMIC_RMW_(__op__, size, addr, val, atomic_index, position)            \
 178         ({                                                                      \
 179                 uint ## size ## _t _old = model_rmwr_action_helper(addr, atomic_index, position);   \
 180                 uint ## size ## _t _copy = _old;                                          \
 181                 uint ## size ## _t _val = val;                                            \
 182                 _copy __op__ _val;                                                    \
 183                 model_rmw_action_helper(addr, (uint64_t) _copy, atomic_index, position);        \
 184                 return _old;                                                          \
 185         })
 186
 187 // cds atomic exchange
 188 uint8_t cds_atomic_exchange8(void* addr, uint8_t val, int atomic_index, const char * position) {
 189         _ATOMIC_RMW_( =, 8, addr, val, atomic_index, position);
 190 }
 191 uint16_t cds_atomic_exchange16(void* addr, uint16_t val, int atomic_index, const char * position) {
 192         _ATOMIC_RMW_( =, 16, addr, val, atomic_index, position);
 193 }
 194 uint32_t cds_atomic_exchange32(void* addr, uint32_t val, int atomic_index, const char * position) {
 195         _ATOMIC_RMW_( =, 32, addr, val, atomic_index, position);
 196 }
 197 uint64_t cds_atomic_exchange64(void* addr, uint64_t val, int atomic_index, const char * position) {
 198         _ATOMIC_RMW_( =, 64, addr, val, atomic_index, position);
 199 }
 200
 201 // cds atomic fetch add
 202 uint8_t cds_atomic_fetch_add8(void* addr, uint8_t val, int atomic_index, const char * position) {
 203         _ATOMIC_RMW_( +=, 8, addr, val, atomic_index, position);
 204 }
 205 uint16_t cds_atomic_fetch_add16(void* addr, uint16_t val, int atomic_index, const char * position) {
 206         _ATOMIC_RMW_( +=, 16, addr, val, atomic_index, position);
 207 }
 208 uint32_t cds_atomic_fetch_add32(void* addr, uint32_t val, int atomic_index, const char * position) {
 209         _ATOMIC_RMW_( +=, 32, addr, val, atomic_index, position);
 210 }
 211 uint64_t cds_atomic_fetch_add64(void* addr, uint64_t val, int atomic_index, const char * position) {
 212         _ATOMIC_RMW_( +=, 64, addr, val, atomic_index, position);
 213 }
 214
 215 // cds atomic fetch sub
 216 uint8_t cds_atomic_fetch_sub8(void* addr, uint8_t val, int atomic_index, const char * position) {
 217         _ATOMIC_RMW_( -=, 8, addr, val, atomic_index, position);
 218 }
 219 uint16_t cds_atomic_fetch_sub16(void* addr, uint16_t val, int atomic_index, const char * position) {
 220         _ATOMIC_RMW_( -=, 16, addr, val, atomic_index, position);
 221 }
 222 uint32_t cds_atomic_fetch_sub32(void* addr, uint32_t val, int atomic_index, const char * position) {
 223         _ATOMIC_RMW_( -=, 32, addr, val, atomic_index, position);
 224 }
 225 uint64_t cds_atomic_fetch_sub64(void* addr, uint64_t val, int atomic_index, const char * position) {
 226         _ATOMIC_RMW_( -=, 64, addr, val, atomic_index, position);
 227 }
 228
 229 // cds atomic fetch and
 230 uint8_t cds_atomic_fetch_and8(void* addr, uint8_t val, int atomic_index, const char * position) {
 231         _ATOMIC_RMW_( &=, 8, addr, val, atomic_index, position);
 232 }
 233 uint16_t cds_atomic_fetch_and16(void* addr, uint16_t val, int atomic_index, const char * position) {
 234         _ATOMIC_RMW_( &=, 16, addr, val, atomic_index, position);
 235 }
 236 uint32_t cds_atomic_fetch_and32(void* addr, uint32_t val, int atomic_index, const char * position) {
 237         _ATOMIC_RMW_( &=, 32, addr, val, atomic_index, position);
 238 }
 239 uint64_t cds_atomic_fetch_and64(void* addr, uint64_t val, int atomic_index, const char * position) {
 240         _ATOMIC_RMW_( &=, 64, addr, val, atomic_index, position);
 241 }
 242
 243 // cds atomic fetch or
 244 uint8_t cds_atomic_fetch_or8(void* addr, uint8_t val, int atomic_index, const char * position) {
 245         _ATOMIC_RMW_( |=, 8, addr, val, atomic_index, position);
 246 }
 247 uint16_t cds_atomic_fetch_or16(void* addr, uint16_t val, int atomic_index, const char * position) {
 248         _ATOMIC_RMW_( |=, 16, addr, val, atomic_index, position);
 249 }
 250 uint32_t cds_atomic_fetch_or32(void* addr, uint32_t val, int atomic_index, const char * position) {
 251         _ATOMIC_RMW_( |=, 32, addr, val, atomic_index, position);
 252 }
 253 uint64_t cds_atomic_fetch_or64(void* addr, uint64_t val, int atomic_index, const char * position) {
 254         _ATOMIC_RMW_( |=, 64, addr, val, atomic_index, position);
 255 }
 256
 257 // cds atomic fetch xor
 258 uint8_t cds_atomic_fetch_xor8(void* addr, uint8_t val, int atomic_index, const char * position) {
 259         _ATOMIC_RMW_( ^=, 8, addr, val, atomic_index, position);
 260 }
 261 uint16_t cds_atomic_fetch_xor16(void* addr, uint16_t val, int atomic_index, const char * position) {
 262         _ATOMIC_RMW_( ^=, 16, addr, val, atomic_index, position);
 263 }
 264 uint32_t cds_atomic_fetch_xor32(void* addr, uint32_t val, int atomic_index, const char * position) {
 265         _ATOMIC_RMW_( ^=, 32, addr, val, atomic_index, position);
 266 }
 267 uint64_t cds_atomic_fetch_xor64(void* addr, uint64_t val, int atomic_index, const char * position) {
 268         _ATOMIC_RMW_( ^=, 64, addr, val, atomic_index, position);
 269 }
 270
 271 // cds atomic compare and exchange
 272 // In order to accomodate the LLVM PASS, the return values are not true or false.
 273
 274 #define _ATOMIC_CMPSWP_WEAK_ _ATOMIC_CMPSWP_
 275 #define _ATOMIC_CMPSWP_(size, addr, expected, desired, atomic_index, position)                            \
 276         ({                                                                                              \
 277                 uint ## size ## _t _desired = desired;                                                            \
 278                 uint ## size ## _t _expected = expected;                                                          \
 279                 uint ## size ## _t _old = model_rmwrcas_action_helper(addr, atomic_index, _expected, sizeof(_expected), position); \
 280                 if (_old == _expected) {                                                                    \
 281                         model_rmw_action_helper(addr, (uint64_t) _desired, atomic_index, position); return _expected; }      \
 282                 else {                                                                                        \
 283                         model_rmwc_action_helper(addr, atomic_index, position); _expected = _old; return _old; }              \
 284         })
 285
 286 // atomic_compare_exchange version 1: the CmpOperand (corresponds to expected)
 287 // extracted from LLVM IR is an integer type.
 288
 289 uint8_t cds_atomic_compare_exchange8_v1(void* addr, uint8_t expected, uint8_t desired,
 290                                                                                                                                                                 int atomic_index_succ, int atomic_index_fail, const char *position )
 291 {
 292         _ATOMIC_CMPSWP_(8, addr, expected, desired,
 293                                                                         atomic_index_succ, position);
 294 }
 295 uint16_t cds_atomic_compare_exchange16_v1(void* addr, uint16_t expected, uint16_t desired,
 296                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 297 {
 298         _ATOMIC_CMPSWP_(16, addr, expected, desired,
 299                                                                         atomic_index_succ, position);
 300 }
 301 uint32_t cds_atomic_compare_exchange32_v1(void* addr, uint32_t expected, uint32_t desired,
 302                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 303 {
 304         _ATOMIC_CMPSWP_(32, addr, expected, desired,
 305                                                                         atomic_index_succ, position);
 306 }
 307 uint64_t cds_atomic_compare_exchange64_v1(void* addr, uint64_t expected, uint64_t desired,
 308                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 309 {
 310         _ATOMIC_CMPSWP_(64, addr, expected, desired,
 311                                                                         atomic_index_succ, position);
 312 }
 313
 314 // atomic_compare_exchange version 2
 315 bool cds_atomic_compare_exchange8_v2(void* addr, uint8_t* expected, uint8_t desired,
 316                                                                                                                                                  int atomic_index_succ, int atomic_index_fail, const char *position )
 317 {
 318         uint8_t ret = cds_atomic_compare_exchange8_v1(addr, *expected,
 319                                                                                                                                                                                                 desired, atomic_index_succ, atomic_index_fail, position);
 320         if (ret == *expected) return true;
 321         else return false;
 322 }
 323 bool cds_atomic_compare_exchange16_v2(void* addr, uint16_t* expected, uint16_t desired,
 324                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 325 {
 326         uint16_t ret = cds_atomic_compare_exchange16_v1(addr, *expected,
 327                                                                                                                                                                                                         desired, atomic_index_succ, atomic_index_fail, position);
 328         if (ret == *expected) return true;
 329         else return false;
 330 }
 331 bool cds_atomic_compare_exchange32_v2(void* addr, uint32_t* expected, uint32_t desired,
 332                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 333 {
 334         uint32_t ret = cds_atomic_compare_exchange32_v1(addr, *expected,
 335                                                                                                                                                                                                         desired, atomic_index_succ, atomic_index_fail, position);
 336         if (ret == *expected) return true;
 337         else return false;
 338 }
 339 bool cds_atomic_compare_exchange64_v2(void* addr, uint64_t* expected, uint64_t desired,
 340                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 341 {
 342         uint64_t ret = cds_atomic_compare_exchange64_v1(addr, *expected,
 343                                                                                                                                                                                                         desired, atomic_index_succ, atomic_index_fail, position);
 344         if (ret == *expected) return true;
 345         else return false;
 346 }
 347
 348
 349 // cds atomic thread fence
 350
 351 void cds_atomic_thread_fence(int atomic_index, const char * position) {
 352         model->switch_to_master(
 353                 new ModelAction(ATOMIC_FENCE, position, orders[atomic_index], FENCE_LOCATION)
 354                 );
 355 }
 356
 357 /*
 358  #define _ATOMIC_CMPSWP_( __a__, __e__, __m__, __x__ )                         \
 359         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 360                 __typeof__(__e__) __q__ = (__e__);                            \
 361                 __typeof__(__m__) __v__ = (__m__);                            \
 362                 bool __r__;                                                   \
 363                 __typeof__((__a__)->__f__) __t__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 364                 if (__t__ == * __q__ ) {                                      \
 365                         model_rmw_action((void *)__p__, __x__, (uint64_t) __v__); __r__ = true; } \
 366                 else {  model_rmwc_action((void *)__p__, __x__); *__q__ = __t__;  __r__ = false;} \
 367                 __r__; })
 368
 369  #define _ATOMIC_FENCE_( __x__ ) \
 370         ({ model_fence_action(__x__);})
 371  */
 372
 373 /*
 374
 375  #define _ATOMIC_MODIFY_( __a__, __o__, __m__, __x__ )                         \
 376         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 377         __typeof__((__a__)->__f__) __old__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 378         __typeof__(__m__) __v__ = (__m__);                                    \
 379         __typeof__((__a__)->__f__) __copy__= __old__;                         \
 380         __copy__ __o__ __v__;                                                 \
 381         model_rmw_action((void *)__p__, __x__, (uint64_t) __copy__);          \
 382         __old__ = __old__;  Silence clang (-Wunused-value)                    \
 383          })
 384  */