cmodelint.cc

   1 #include <stdio.h>
   2 #include "model.h"
   3 #include "action.h"
   4 #include "cmodelint.h"
   5 #include "snapshot-interface.h"
   6 #include "threads-model.h"
   7
   8 memory_order orders[6] = {
   9         memory_order_relaxed, memory_order_consume, memory_order_acquire,
  10         memory_order_release, memory_order_acq_rel, memory_order_seq_cst
  11 };
  12
  13 static void ensureModel() {
  14         if (!model) {
  15                 snapshot_system_init(10000, 1024, 1024, 40000);
  16                 model = new ModelChecker();
  17         }
  18 }
  19
  20 /** Performs a read action.*/
  21 uint64_t model_read_action(void * obj, memory_order ord) {
  22         return model->switch_to_master(new ModelAction(ATOMIC_READ, ord, obj));
  23 }
  24
  25 /** Performs a write action.*/
  26 void model_write_action(void * obj, memory_order ord, uint64_t val) {
  27         model->switch_to_master(new ModelAction(ATOMIC_WRITE, ord, obj, val));
  28 }
  29
  30 /** Performs an init action. */
  31 void model_init_action(void * obj, uint64_t val) {
  32         model->switch_to_master(new ModelAction(ATOMIC_INIT, memory_order_relaxed, obj, val));
  33 }
  34
  35 /**
  36  * Performs the read part of a RMW action. The next action must either be the
  37  * write part of the RMW action or an explicit close out of the RMW action w/o
  38  * a write.
  39  */
  40 uint64_t model_rmwr_action(void *obj, memory_order ord) {
  41         return model->switch_to_master(new ModelAction(ATOMIC_RMWR, ord, obj));
  42 }
  43
  44 /**
  45  * Performs the read part of a RMW CAS action. The next action must
  46  * either be the write part of the RMW action or an explicit close out
  47  * of the RMW action w/o a write.
  48  */
  49 uint64_t model_rmwrcas_action(void *obj, memory_order ord, uint64_t oldval, int size) {
  50         return model->switch_to_master(new ModelAction(ATOMIC_RMWRCAS, ord, obj, oldval, size));
  51 }
  52
  53
  54 /** Performs the write part of a RMW action. */
  55 void model_rmw_action(void *obj, memory_order ord, uint64_t val) {
  56         model->switch_to_master(new ModelAction(ATOMIC_RMW, ord, obj, val));
  57 }
  58
  59 /** Closes out a RMW action without doing a write. */
  60 void model_rmwc_action(void *obj, memory_order ord) {
  61         model->switch_to_master(new ModelAction(ATOMIC_RMWC, ord, obj));
  62 }
  63
  64 /** Issues a fence operation. */
  65 void model_fence_action(memory_order ord) {
  66         model->switch_to_master(new ModelAction(ATOMIC_FENCE, ord, FENCE_LOCATION));
  67 }
  68
  69 /* ---  helper functions --- */
  70 uint64_t model_rmwrcas_action_helper(void *obj, int atomic_index, uint64_t oldval, int size, const char *position) {
  71         return model->switch_to_master(
  72                 new ModelAction(ATOMIC_RMWRCAS, position, orders[atomic_index], obj)
  73                 );
  74 }
  75
  76 uint64_t model_rmwr_action_helper(void *obj, int atomic_index, const char *position) {
  77         return model->switch_to_master(
  78                 new ModelAction(ATOMIC_RMWR, position, orders[atomic_index], obj)
  79                 );
  80 }
  81
  82 void model_rmw_action_helper(void *obj, uint64_t val, int atomic_index, const char * position) {
  83         model->switch_to_master(
  84                 new ModelAction(ATOMIC_RMW, position, orders[atomic_index], obj, val)
  85                 );
  86 }
  87
  88 void model_rmwc_action_helper(void *obj, int atomic_index, const char *position) {
  89         model->switch_to_master(
  90                 new ModelAction(ATOMIC_RMWC, position, orders[atomic_index], obj)
  91                 );
  92 }
  93
  94 // cds atomic inits
  95 void cds_atomic_init8(void * obj, uint8_t val, const char * position) {
  96         ensureModel();
  97         model->switch_to_master(
  98                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)
  99                 );
 100 }
 101 void cds_atomic_init16(void * obj, uint16_t val, const char * position) {
 102         ensureModel();
 103         model->switch_to_master(
 104                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)
 105                 );
 106 }
 107 void cds_atomic_init32(void * obj, uint32_t val, const char * position) {
 108         ensureModel();
 109         model->switch_to_master(
 110                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)
 111                 );
 112 }
 113 void cds_atomic_init64(void * obj, uint64_t val, const char * position) {
 114         ensureModel();
 115         model->switch_to_master(
 116                 new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, val)
 117                 );
 118 }
 119
 120
 121 // cds atomic loads
 122 uint8_t cds_atomic_load8(void * obj, int atomic_index, const char * position) {
 123         return (uint8_t) ( model->switch_to_master(
 124                                                                                          new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj))
 125                                                                                  );
 126 }
 127 uint16_t cds_atomic_load16(void * obj, int atomic_index, const char * position) {
 128         return (uint16_t) ( model->switch_to_master(
 129                                                                                                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj))
 130                                                                                         );
 131 }
 132 uint32_t cds_atomic_load32(void * obj, int atomic_index, const char * position) {
 133         return (uint32_t) ( model->switch_to_master(
 134                                                                                                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj))
 135                                                                                         );
 136 }
 137 uint64_t cds_atomic_load64(void * obj, int atomic_index, const char * position) {
 138         return model->switch_to_master(
 139                 new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj)
 140                 );
 141 }
 142
 143 // cds atomic stores
 144 void cds_atomic_store8(void * obj, uint8_t val, int atomic_index, const char * position) {
 145         ensureModel();
 146         model->switch_to_master(
 147                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)
 148                 );
 149 }
 150 void cds_atomic_store16(void * obj, uint16_t val, int atomic_index, const char * position) {
 151         ensureModel();
 152         model->switch_to_master(
 153                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)
 154                 );
 155 }
 156 void cds_atomic_store32(void * obj, uint32_t val, int atomic_index, const char * position) {
 157         ensureModel();
 158         model->switch_to_master(
 159                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)
 160                 );
 161 }
 162 void cds_atomic_store64(void * obj, uint64_t val, int atomic_index, const char * position) {
 163         ensureModel();
 164         model->switch_to_master(
 165                 new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, val)
 166                 );
 167 }
 168
 169 #define _ATOMIC_RMW_(__op__, size, addr, val, atomic_index, position)            \
 170         ({                                                                      \
 171                 uint ## size ## _t _old = model_rmwr_action_helper(addr, atomic_index, position);   \
 172                 uint ## size ## _t _copy = _old;                                          \
 173                 uint ## size ## _t _val = val;                                            \
 174                 _copy __op__ _val;                                                    \
 175                 model_rmw_action_helper(addr, (uint64_t) _copy, atomic_index, position);        \
 176                 return _old;                                                          \
 177         })
 178
 179 // cds atomic exchange
 180 uint8_t cds_atomic_exchange8(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_exchange16(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_exchange32(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_exchange64(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 add
 194 uint8_t cds_atomic_fetch_add8(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_add16(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_add32(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_add64(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 sub
 208 uint8_t cds_atomic_fetch_sub8(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_sub16(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_sub32(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_sub64(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 and
 222 uint8_t cds_atomic_fetch_and8(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_and16(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_and32(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_and64(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 or
 236 uint8_t cds_atomic_fetch_or8(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_or16(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_or32(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_or64(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 fetch xor
 250 uint8_t cds_atomic_fetch_xor8(void* addr, uint8_t val, int atomic_index, const char * position) {
 251         _ATOMIC_RMW_( ^=, 8, addr, val, atomic_index, position);
 252 }
 253 uint16_t cds_atomic_fetch_xor16(void* addr, uint16_t val, int atomic_index, const char * position) {
 254         _ATOMIC_RMW_( ^=, 16, addr, val, atomic_index, position);
 255 }
 256 uint32_t cds_atomic_fetch_xor32(void* addr, uint32_t val, int atomic_index, const char * position) {
 257         _ATOMIC_RMW_( ^=, 32, addr, val, atomic_index, position);
 258 }
 259 uint64_t cds_atomic_fetch_xor64(void* addr, uint64_t val, int atomic_index, const char * position) {
 260         _ATOMIC_RMW_( ^=, 64, addr, val, atomic_index, position);
 261 }
 262
 263 // cds atomic compare and exchange
 264 // In order to accomodate the LLVM PASS, the return values are not true or false.
 265
 266 #define _ATOMIC_CMPSWP_WEAK_ _ATOMIC_CMPSWP_
 267 #define _ATOMIC_CMPSWP_(size, addr, expected, desired, atomic_index, position)                            \
 268         ({                                                                                              \
 269                 uint ## size ## _t _desired = desired;                                                            \
 270                 uint ## size ## _t _expected = expected;                                                          \
 271                 uint ## size ## _t _old = model_rmwrcas_action_helper(addr, atomic_index, _expected, sizeof(_expected), position); \
 272                 if (_old == _expected) {                                                                    \
 273                         model_rmw_action_helper(addr, (uint64_t) _desired, atomic_index, position); return _expected; }      \
 274                 else {                                                                                        \
 275                         model_rmwc_action_helper(addr, atomic_index, position); _expected = _old; return _old; }              \
 276         })
 277
 278 // atomic_compare_exchange version 1: the CmpOperand (corresponds to expected)
 279 // extracted from LLVM IR is an integer type.
 280
 281 uint8_t cds_atomic_compare_exchange8_v1(void* addr, uint8_t expected, uint8_t desired,
 282                                                                                                                                                                 int atomic_index_succ, int atomic_index_fail, const char *position )
 283 {
 284         _ATOMIC_CMPSWP_(8, addr, expected, desired,
 285                                                                         atomic_index_succ, position);
 286 }
 287 uint16_t cds_atomic_compare_exchange16_v1(void* addr, uint16_t expected, uint16_t desired,
 288                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 289 {
 290         _ATOMIC_CMPSWP_(16, addr, expected, desired,
 291                                                                         atomic_index_succ, position);
 292 }
 293 uint32_t cds_atomic_compare_exchange32_v1(void* addr, uint32_t expected, uint32_t desired,
 294                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 295 {
 296         _ATOMIC_CMPSWP_(32, addr, expected, desired,
 297                                                                         atomic_index_succ, position);
 298 }
 299 uint64_t cds_atomic_compare_exchange64_v1(void* addr, uint64_t expected, uint64_t desired,
 300                                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 301 {
 302         _ATOMIC_CMPSWP_(64, addr, expected, desired,
 303                                                                         atomic_index_succ, position);
 304 }
 305
 306 // atomic_compare_exchange version 2
 307 bool cds_atomic_compare_exchange8_v2(void* addr, uint8_t* expected, uint8_t desired,
 308                                                                                                                                                  int atomic_index_succ, int atomic_index_fail, const char *position )
 309 {
 310         uint8_t ret = cds_atomic_compare_exchange8_v1(addr, *expected,
 311                                                                                                                                                                                                 desired, atomic_index_succ, atomic_index_fail, position);
 312         if (ret == *expected) return true;
 313         else return false;
 314 }
 315 bool cds_atomic_compare_exchange16_v2(void* addr, uint16_t* expected, uint16_t desired,
 316                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 317 {
 318         uint16_t ret = cds_atomic_compare_exchange16_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_exchange32_v2(void* addr, uint32_t* expected, uint32_t desired,
 324                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 325 {
 326         uint32_t ret = cds_atomic_compare_exchange32_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_exchange64_v2(void* addr, uint64_t* expected, uint64_t desired,
 332                                                                                                                                                         int atomic_index_succ, int atomic_index_fail, const char *position)
 333 {
 334         uint64_t ret = cds_atomic_compare_exchange64_v1(addr, *expected,
 335                                                                                                                                                                                                         desired, atomic_index_succ, atomic_index_fail, position);
 336         if (ret == *expected) return true;
 337         else return false;
 338 }
 339
 340
 341 // cds atomic thread fence
 342
 343 void cds_atomic_thread_fence(int atomic_index, const char * position) {
 344         model->switch_to_master(
 345                 new ModelAction(ATOMIC_FENCE, position, orders[atomic_index], FENCE_LOCATION)
 346                 );
 347 }
 348
 349 /*
 350  #define _ATOMIC_CMPSWP_( __a__, __e__, __m__, __x__ )                         \
 351         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 352                 __typeof__(__e__) __q__ = (__e__);                            \
 353                 __typeof__(__m__) __v__ = (__m__);                            \
 354                 bool __r__;                                                   \
 355                 __typeof__((__a__)->__f__) __t__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 356                 if (__t__ == * __q__ ) {                                      \
 357                         model_rmw_action((void *)__p__, __x__, (uint64_t) __v__); __r__ = true; } \
 358                 else {  model_rmwc_action((void *)__p__, __x__); *__q__ = __t__;  __r__ = false;} \
 359                 __r__; })
 360
 361  #define _ATOMIC_FENCE_( __x__ ) \
 362         ({ model_fence_action(__x__);})
 363  */
 364
 365 /*
 366
 367  #define _ATOMIC_MODIFY_( __a__, __o__, __m__, __x__ )                         \
 368         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 369         __typeof__((__a__)->__f__) __old__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 370         __typeof__(__m__) __v__ = (__m__);                                    \
 371         __typeof__((__a__)->__f__) __copy__= __old__;                         \
 372         __copy__ __o__ __v__;                                                 \
 373         model_rmw_action((void *)__p__, __x__, (uint64_t) __copy__);          \
 374         __old__ = __old__;  Silence clang (-Wunused-value)                    \
 375          })
 376  */