cmodelint.cc

   1 #include <stdio.h>
   2 #include <string>
   3
   4 #include "model.h"
   5 #include "execution.h"
   6 #include "action.h"
   7 #include "history.h"
   8 #include "cmodelint.h"
   9 #include "snapshot-interface.h"
  10 #include "threads-model.h"
  11
  12 memory_order orders[6] = {
  13         memory_order_relaxed, memory_order_consume, memory_order_acquire,
  14         memory_order_release, memory_order_acq_rel, memory_order_seq_cst
  15 };
  16
  17 static void ensureModel() {
  18         if (!model) {
  19                 snapshot_system_init(10000, 1024, 1024, 40000);
  20                 model = new ModelChecker();
  21                 model->startChecker();
  22         }
  23 }
  24
  25 /** Performs a read action.*/
  26 uint64_t model_read_action(void * obj, memory_order ord) {
  27         return model->switch_to_master(new ModelAction(ATOMIC_READ, ord, obj));
  28 }
  29
  30 /** Performs a write action.*/
  31 void model_write_action(void * obj, memory_order ord, uint64_t val) {
  32         model->switch_to_master(new ModelAction(ATOMIC_WRITE, ord, obj, val));
  33 }
  34
  35 /** Performs an init action. */
  36 void model_init_action(void * obj, uint64_t val) {
  37         model->switch_to_master(new ModelAction(ATOMIC_INIT, memory_order_relaxed, obj, val));
  38 }
  39
  40 /**
  41  * Performs the read part of a RMW action. The next action must either be the
  42  * write part of the RMW action or an explicit close out of the RMW action w/o
  43  * a write.
  44  */
  45 uint64_t model_rmwr_action(void *obj, memory_order ord) {
  46         return model->switch_to_master(new ModelAction(ATOMIC_RMWR, ord, obj));
  47 }
  48
  49 /**
  50  * Performs the read part of a RMW CAS action. The next action must
  51  * either be the write part of the RMW action or an explicit close out
  52  * of the RMW action w/o a write.
  53  */
  54 uint64_t model_rmwrcas_action(void *obj, memory_order ord, uint64_t oldval, int size) {
  55         return model->switch_to_master(new ModelAction(ATOMIC_RMWRCAS, ord, obj, oldval, size));
  56 }
  57
  58
  59 /** Performs the write part of a RMW action. */
  60 void model_rmw_action(void *obj, memory_order ord, uint64_t val) {
  61         model->switch_to_master(new ModelAction(ATOMIC_RMW, ord, obj, val));
  62 }
  63
  64 /** Closes out a RMW action without doing a write. */
  65 void model_rmwc_action(void *obj, memory_order ord) {
  66         model->switch_to_master(new ModelAction(ATOMIC_RMWC, ord, obj));
  67 }
  68
  69 /** Issues a fence operation. */
  70 void model_fence_action(memory_order ord) {
  71         model->switch_to_master(new ModelAction(ATOMIC_FENCE, ord, FENCE_LOCATION));
  72 }
  73
  74 /* ---  helper functions --- */
  75 uint64_t model_rmwrcas_action_helper(void *obj, int atomic_index, uint64_t oldval, int size, const char *position) {
  76         ensureModel();
  77         return model->switch_to_master(new ModelAction(ATOMIC_RMWRCAS, position, orders[atomic_index], obj, oldval, size));
  78 }
  79
  80 uint64_t model_rmwr_action_helper(void *obj, int atomic_index, const char *position) {
  81         ensureModel();
  82         return model->switch_to_master(new ModelAction(ATOMIC_RMWR, position, orders[atomic_index], obj));
  83 }
  84
  85 void model_rmw_action_helper(void *obj, uint64_t val, int atomic_index, const char * position) {
  86         ensureModel();
  87         model->switch_to_master(new ModelAction(ATOMIC_RMW, position, orders[atomic_index], obj, val));
  88 }
  89
  90 void model_rmwc_action_helper(void *obj, int atomic_index, const char *position) {
  91         ensureModel();
  92         model->switch_to_master(new ModelAction(ATOMIC_RMWC, position, orders[atomic_index], obj));
  93 }
  94
  95 // cds atomic inits
  96 void cds_atomic_init8(void * obj, uint8_t val, const char * position) {
  97         ensureModel();
  98         model->switch_to_master(new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val));
  99 }
 100 void cds_atomic_init16(void * obj, uint16_t val, const char * position) {
 101         ensureModel();
 102         model->switch_to_master(new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val));
 103 }
 104 void cds_atomic_init32(void * obj, uint32_t val, const char * position) {
 105         ensureModel();
 106         model->switch_to_master(new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val));
 107 }
 108 void cds_atomic_init64(void * obj, uint64_t val, const char * position) {
 109         ensureModel();
 110         model->switch_to_master(new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, val));
 111 }
 112
 113
 114 // cds atomic loads
 115 uint8_t cds_atomic_load8(void * obj, int atomic_index, const char * position) {
 116         ensureModel();
 117         return (uint8_t) model->switch_to_master(
 118                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj));
 119 }
 120 uint16_t cds_atomic_load16(void * obj, int atomic_index, const char * position) {
 121         ensureModel();
 122         return (uint16_t) model->switch_to_master(
 123                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj));
 124 }
 125 uint32_t cds_atomic_load32(void * obj, int atomic_index, const char * position) {
 126         ensureModel();
 127         return (uint32_t) model->switch_to_master(
 128                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj)
 129                 );
 130 }
 131 uint64_t cds_atomic_load64(void * obj, int atomic_index, const char * position) {
 132         ensureModel();
 133         return model->switch_to_master(
 134                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj));
 135 }
 136
 137 // cds atomic stores
 138 void cds_atomic_store8(void * obj, uint8_t val, int atomic_index, const char * position) {
 139         ensureModel();
 140         model->switch_to_master(new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val));
 141 }
 142 void cds_atomic_store16(void * obj, uint16_t val, int atomic_index, const char * position) {
 143         ensureModel();
 144         model->switch_to_master(new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val));
 145 }
 146 void cds_atomic_store32(void * obj, uint32_t val, int atomic_index, const char * position) {
 147         ensureModel();
 148         model->switch_to_master(new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val));
 149 }
 150 void cds_atomic_store64(void * obj, uint64_t val, int atomic_index, const char * position) {
 151         ensureModel();
 152         model->switch_to_master(new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val));
 153 }
 154
 155 #define _ATOMIC_RMW_(__op__, size, addr, val, atomic_index, position)            \
 156         ({                                                                      \
 157                 uint ## size ## _t _old = model_rmwr_action_helper(addr, atomic_index, position);   \
 158                 uint ## size ## _t _copy = _old;                                          \
 159                 uint ## size ## _t _val = val;                                            \
 160                 _copy __op__ _val;                                                    \
 161                 model_rmw_action_helper(addr, (uint64_t) _copy, atomic_index, position);        \
 162                 return _old;                                                          \
 163         })
 164
 165 // cds atomic exchange
 166 uint8_t cds_atomic_exchange8(void* addr, uint8_t val, int atomic_index, const char * position) {
 167         _ATOMIC_RMW_( =, 8, addr, val, atomic_index, position);
 168 }
 169 uint16_t cds_atomic_exchange16(void* addr, uint16_t val, int atomic_index, const char * position) {
 170         _ATOMIC_RMW_( =, 16, addr, val, atomic_index, position);
 171 }
 172 uint32_t cds_atomic_exchange32(void* addr, uint32_t val, int atomic_index, const char * position) {
 173         _ATOMIC_RMW_( =, 32, addr, val, atomic_index, position);
 174 }
 175 uint64_t cds_atomic_exchange64(void* addr, uint64_t val, int atomic_index, const char * position) {
 176         _ATOMIC_RMW_( =, 64, addr, val, atomic_index, position);
 177 }
 178
 179 // cds atomic fetch add
 180 uint8_t cds_atomic_fetch_add8(void* addr, uint8_t val, int atomic_index, const char * position) {
 181         _ATOMIC_RMW_( +=, 8, addr, val, atomic_index, position);
 182 }
 183 uint16_t cds_atomic_fetch_add16(void* addr, uint16_t val, int atomic_index, const char * position) {
 184         _ATOMIC_RMW_( +=, 16, addr, val, atomic_index, position);
 185 }
 186 uint32_t cds_atomic_fetch_add32(void* addr, uint32_t val, int atomic_index, const char * position) {
 187         _ATOMIC_RMW_( +=, 32, addr, val, atomic_index, position);
 188 }
 189 uint64_t cds_atomic_fetch_add64(void* addr, uint64_t val, int atomic_index, const char * position) {
 190         _ATOMIC_RMW_( +=, 64, addr, val, atomic_index, position);
 191 }
 192
 193 // cds atomic fetch sub
 194 uint8_t cds_atomic_fetch_sub8(void* addr, uint8_t val, int atomic_index, const char * position) {
 195         _ATOMIC_RMW_( -=, 8, addr, val, atomic_index, position);
 196 }
 197 uint16_t cds_atomic_fetch_sub16(void* addr, uint16_t val, int atomic_index, const char * position) {
 198         _ATOMIC_RMW_( -=, 16, addr, val, atomic_index, position);
 199 }
 200 uint32_t cds_atomic_fetch_sub32(void* addr, uint32_t val, int atomic_index, const char * position) {
 201         _ATOMIC_RMW_( -=, 32, addr, val, atomic_index, position);
 202 }
 203 uint64_t cds_atomic_fetch_sub64(void* addr, uint64_t val, int atomic_index, const char * position) {
 204         _ATOMIC_RMW_( -=, 64, addr, val, atomic_index, position);
 205 }
 206
 207 // cds atomic fetch and
 208 uint8_t cds_atomic_fetch_and8(void* addr, uint8_t val, int atomic_index, const char * position) {
 209         _ATOMIC_RMW_( &=, 8, addr, val, atomic_index, position);
 210 }
 211 uint16_t cds_atomic_fetch_and16(void* addr, uint16_t val, int atomic_index, const char * position) {
 212         _ATOMIC_RMW_( &=, 16, addr, val, atomic_index, position);
 213 }
 214 uint32_t cds_atomic_fetch_and32(void* addr, uint32_t val, int atomic_index, const char * position) {
 215         _ATOMIC_RMW_( &=, 32, addr, val, atomic_index, position);
 216 }
 217 uint64_t cds_atomic_fetch_and64(void* addr, uint64_t val, int atomic_index, const char * position) {
 218         _ATOMIC_RMW_( &=, 64, addr, val, atomic_index, position);
 219 }
 220
 221 // cds atomic fetch or
 222 uint8_t cds_atomic_fetch_or8(void* addr, uint8_t val, int atomic_index, const char * position) {
 223         _ATOMIC_RMW_( |=, 8, addr, val, atomic_index, position);
 224 }
 225 uint16_t cds_atomic_fetch_or16(void* addr, uint16_t val, int atomic_index, const char * position) {
 226         _ATOMIC_RMW_( |=, 16, addr, val, atomic_index, position);
 227 }
 228 uint32_t cds_atomic_fetch_or32(void* addr, uint32_t val, int atomic_index, const char * position) {
 229         _ATOMIC_RMW_( |=, 32, addr, val, atomic_index, position);
 230 }
 231 uint64_t cds_atomic_fetch_or64(void* addr, uint64_t val, int atomic_index, const char * position) {
 232         _ATOMIC_RMW_( |=, 64, addr, val, atomic_index, position);
 233 }
 234
 235 // cds atomic fetch xor
 236 uint8_t cds_atomic_fetch_xor8(void* addr, uint8_t val, int atomic_index, const char * position) {
 237         _ATOMIC_RMW_( ^=, 8, addr, val, atomic_index, position);
 238 }
 239 uint16_t cds_atomic_fetch_xor16(void* addr, uint16_t val, int atomic_index, const char * position) {
 240         _ATOMIC_RMW_( ^=, 16, addr, val, atomic_index, position);
 241 }
 242 uint32_t cds_atomic_fetch_xor32(void* addr, uint32_t val, int atomic_index, const char * position) {
 243         _ATOMIC_RMW_( ^=, 32, addr, val, atomic_index, position);
 244 }
 245 uint64_t cds_atomic_fetch_xor64(void* addr, uint64_t val, int atomic_index, const char * position) {
 246         _ATOMIC_RMW_( ^=, 64, addr, val, atomic_index, position);
 247 }
 248
 249 // cds atomic compare and exchange
 250 // In order to accomodate the LLVM PASS, the return values are not true or false.
 251
 252 #define _ATOMIC_CMPSWP_WEAK_ _ATOMIC_CMPSWP_
 253 #define _ATOMIC_CMPSWP_(size, addr, expected, desired, atomic_index, position)                            \
 254         ({                                                                                              \
 255                 uint ## size ## _t _desired = desired;                                                            \
 256                 uint ## size ## _t _expected = expected;                                                          \
 257                 uint ## size ## _t _old = model_rmwrcas_action_helper(addr, atomic_index, _expected, sizeof(_expected), position); \
 258                 if (_old == _expected) {                                                                    \
 259                         model_rmw_action_helper(addr, (uint64_t) _desired, atomic_index, position); return _expected; }      \
 260                 else {                                                                                        \
 261                         model_rmwc_action_helper(addr, atomic_index, position); _expected = _old; return _old; }              \
 262         })
 263
 264 // atomic_compare_exchange version 1: the CmpOperand (corresponds to expected)
 265 // extracted from LLVM IR is an integer type.
 266
 267 uint8_t cds_atomic_compare_exchange8_v1(void* addr, uint8_t expected, uint8_t desired,
 268                                                                                                                                                                 int atomic_index_succ, int atomic_index_fail, const char *position )
 269 {
 270         _ATOMIC_CMPSWP_(8, addr, expected, desired,
 271                                                                         atomic_index_succ, position);
 272 }
 273 uint16_t cds_atomic_compare_exchange16_v1(void* addr, uint16_t expected, uint16_t desired,
 274                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 275 {
 276         _ATOMIC_CMPSWP_(16, addr, expected, desired,
 277                                                                         atomic_index_succ, position);
 278 }
 279 uint32_t cds_atomic_compare_exchange32_v1(void* addr, uint32_t expected, uint32_t desired,
 280                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 281 {
 282         _ATOMIC_CMPSWP_(32, addr, expected, desired,
 283                                                                         atomic_index_succ, position);
 284 }
 285 uint64_t cds_atomic_compare_exchange64_v1(void* addr, uint64_t expected, uint64_t desired,
 286                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 287 {
 288         _ATOMIC_CMPSWP_(64, addr, expected, desired,
 289                                                                         atomic_index_succ, position);
 290 }
 291
 292 // atomic_compare_exchange version 2
 293 bool cds_atomic_compare_exchange8_v2(void* addr, uint8_t* expected, uint8_t desired,
 294                                                                                                                                                  int atomic_index_succ, int atomic_index_fail, const char *position )
 295 {
 296         uint8_t ret = cds_atomic_compare_exchange8_v1(addr, *expected,
 297                                                                                                                                                                                                 desired, atomic_index_succ, atomic_index_fail, position);
 298         if (ret == *expected) return true;
 299         else return false;
 300 }
 301 bool cds_atomic_compare_exchange16_v2(void* addr, uint16_t* expected, uint16_t desired,
 302                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 303 {
 304         uint16_t ret = cds_atomic_compare_exchange16_v1(addr, *expected,
 305                                                                                                                                                                                                         desired, atomic_index_succ, atomic_index_fail, position);
 306         if (ret == *expected) return true;
 307         else return false;
 308 }
 309 bool cds_atomic_compare_exchange32_v2(void* addr, uint32_t* expected, uint32_t desired,
 310                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 311 {
 312         uint32_t ret = cds_atomic_compare_exchange32_v1(addr, *expected,
 313                                                                                                                                                                                                         desired, atomic_index_succ, atomic_index_fail, position);
 314         if (ret == *expected) return true;
 315         else return false;
 316 }
 317 bool cds_atomic_compare_exchange64_v2(void* addr, uint64_t* expected, uint64_t desired,
 318                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 319 {
 320         uint64_t ret = cds_atomic_compare_exchange64_v1(addr, *expected,
 321                                                                                                                                                                                                         desired, atomic_index_succ, atomic_index_fail, position);
 322         if (ret == *expected) return true;
 323         else return false;
 324 }
 325
 326
 327 // cds atomic thread fence
 328
 329 void cds_atomic_thread_fence(int atomic_index, const char * position) {
 330         model->switch_to_master(
 331                 new ModelAction(ATOMIC_FENCE, position, orders[atomic_index], FENCE_LOCATION)
 332                 );
 333 }
 334
 335 /*
 336  #define _ATOMIC_CMPSWP_( __a__, __e__, __m__, __x__ )                         \
 337         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 338                 __typeof__(__e__) __q__ = (__e__);                            \
 339                 __typeof__(__m__) __v__ = (__m__);                            \
 340                 bool __r__;                                                   \
 341                 __typeof__((__a__)->__f__) __t__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 342                 if (__t__ == * __q__ ) {                                      \
 343                         model_rmw_action((void *)__p__, __x__, (uint64_t) __v__); __r__ = true; } \
 344                 else {  model_rmwc_action((void *)__p__, __x__); *__q__ = __t__;  __r__ = false;} \
 345                 __r__; })
 346
 347  #define _ATOMIC_FENCE_( __x__ ) \
 348         ({ model_fence_action(__x__);})
 349  */
 350
 351 /*
 352
 353  #define _ATOMIC_MODIFY_( __a__, __o__, __m__, __x__ )                         \
 354         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 355         __typeof__((__a__)->__f__) __old__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 356         __typeof__(__m__) __v__ = (__m__);                                    \
 357         __typeof__((__a__)->__f__) __copy__= __old__;                         \
 358         __copy__ __o__ __v__;                                                 \
 359         model_rmw_action((void *)__p__, __x__, (uint64_t) __copy__);          \
 360         __old__ = __old__;  Silence clang (-Wunused-value)                    \
 361          })
 362  */
 363
 364 void cds_func_entry(const char * funcName) {
 365         if (!model) return;
 366
 367         Thread * th = thread_current();
 368         uint32_t func_id;
 369
 370         ModelHistory *history = model->get_history();
 371         if ( !history->getFuncMap()->contains(funcName) ) {
 372                 func_id = history->get_func_counter();
 373                 history->incr_func_counter();
 374
 375                 history->getFuncMap()->put(funcName, func_id);
 376         } else {
 377                 func_id = history->getFuncMap()->get(funcName);
 378         }
 379
 380         history->enter_function(func_id, th->get_id());
 381 }
 382
 383 void cds_func_exit(const char * funcName) {
 384         if (!model) return;
 385
 386         Thread * th = thread_current();
 387         uint32_t func_id;
 388
 389         ModelHistory *history = model->get_history();
 390         func_id = history->getFuncMap()->get(funcName);
 391
 392         history->exit_function(func_id, th->get_id());
 393 }