cmodelint.cc

   1 #include <stdio.h>
   2 #include <string>
   3
   4 #include "model.h"
   5 #include "execution.h"
   6 #include "action.h"
   7 #include "cmodelint.h"
   8 #include "snapshot-interface.h"
   9 #include "threads-model.h"
  10 #include "datarace.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 /* ---  helper functions --- */
  18 uint64_t model_rmwrcas_action_helper(void *obj, int atomic_index, uint64_t oldval, int size, const char *position) {
  19         createModelIfNotExist();
  20         return model->switch_thread(new ModelAction(ATOMIC_RMWRCAS, position, orders[atomic_index], obj, oldval, size));
  21 }
  22
  23 uint64_t model_rmwr_action_helper(void *obj, int atomic_index, const char *position) {
  24         createModelIfNotExist();
  25         return model->switch_thread(new ModelAction(ATOMIC_RMWR, position, orders[atomic_index], obj));
  26 }
  27
  28 void model_rmw_action_helper(void *obj, uint64_t val, int atomic_index, const char * position) {
  29         createModelIfNotExist();
  30         model->switch_thread(new ModelAction(ATOMIC_RMW, position, orders[atomic_index], obj, val));
  31 }
  32
  33 void model_rmwc_action_helper(void *obj, int atomic_index, const char *position) {
  34         createModelIfNotExist();
  35         model->switch_thread(new ModelAction(ATOMIC_RMWC, position, orders[atomic_index], obj));
  36 }
  37
  38 // cds volatile loads
  39 #define VOLATILELOAD(size) \
  40         uint ## size ## _t cds_volatile_load ## size(void * obj, const char * position) { \
  41                 createModelIfNotExist();                                                      \
  42                 return (uint ## size ## _t)model->switch_thread(new ModelAction(ATOMIC_READ, position, memory_order_volatile_load, obj)); \
  43         }
  44
  45 VOLATILELOAD(8)
  46 VOLATILELOAD(16)
  47 VOLATILELOAD(32)
  48 VOLATILELOAD(64)
  49
  50 // cds volatile stores
  51 #define VOLATILESTORE(size) \
  52         void cds_volatile_store ## size (void * obj, uint ## size ## _t val, const char * position) { \
  53                 createModelIfNotExist();                                                      \
  54                 model->switch_thread(new ModelAction(ATOMIC_WRITE, position, memory_order_volatile_store, obj, (uint64_t) val)); \
  55                 *((volatile uint ## size ## _t *)obj) = val;            \
  56                 thread_id_t tid = thread_current_id();           \
  57                 for(int i=0;i < size / 8;i++) {                         \
  58                         atomraceCheckWrite(tid, (void *)(((char *)obj)+i));          \
  59                 }                                                       \
  60         }
  61
  62 VOLATILESTORE(8)
  63 VOLATILESTORE(16)
  64 VOLATILESTORE(32)
  65 VOLATILESTORE(64)
  66
  67 // cds atomic inits
  68 #define CDSATOMICINT(size)                                              \
  69         void cds_atomic_init ## size (void * obj, uint ## size ## _t val, const char * position) { \
  70                 createModelIfNotExist();                                                      \
  71                 model->switch_thread(new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)); \
  72                 *((volatile uint ## size ## _t *)obj) = val;                                 \
  73                 thread_id_t tid = thread_current_id();           \
  74                 for(int i=0;i < size / 8;i++) {                       \
  75                         atomraceCheckWrite(tid, (void *)(((char *)obj)+i));          \
  76                 }                                                       \
  77         }
  78
  79 CDSATOMICINT(8)
  80 CDSATOMICINT(16)
  81 CDSATOMICINT(32)
  82 CDSATOMICINT(64)
  83
  84 // cds atomic loads
  85 #define CDSATOMICLOAD(size)                                             \
  86         uint ## size ## _t cds_atomic_load ## size(void * obj, int atomic_index, const char * position) { \
  87                 createModelIfNotExist();                                                      \
  88                 uint ## size ## _t val = (uint ## size ## _t)model->switch_thread( \
  89                         new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj)); \
  90                 thread_id_t tid = thread_current_id();           \
  91                 for(int i=0;i < size / 8;i++) {                         \
  92                         atomraceCheckRead(tid, (void *)(((char *)obj)+i));    \
  93                 }                                                       \
  94                 return val; \
  95         }
  96
  97 CDSATOMICLOAD(8)
  98 CDSATOMICLOAD(16)
  99 CDSATOMICLOAD(32)
 100 CDSATOMICLOAD(64)
 101
 102 // cds atomic stores
 103 #define CDSATOMICSTORE(size)                                            \
 104         void cds_atomic_store ## size(void * obj, uint ## size ## _t val, int atomic_index, const char * position) { \
 105                 createModelIfNotExist();                                                        \
 106                 model->switch_thread(new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)); \
 107                 *((volatile uint ## size ## _t *)obj) = val;                     \
 108                 thread_id_t tid = thread_current_id();           \
 109                 for(int i=0;i < size / 8;i++) {                       \
 110                         atomraceCheckWrite(tid, (void *)(((char *)obj)+i));          \
 111                 }                                                       \
 112         }
 113
 114 CDSATOMICSTORE(8)
 115 CDSATOMICSTORE(16)
 116 CDSATOMICSTORE(32)
 117 CDSATOMICSTORE(64)
 118
 119
 120 #define _ATOMIC_RMW_(__op__, size, addr, val, atomic_index, position)            \
 121         ({                                                                      \
 122                 uint ## size ## _t _old = model_rmwr_action_helper(addr, atomic_index, position);   \
 123                 uint ## size ## _t _copy = _old;                                          \
 124                 uint ## size ## _t _val = val;                                            \
 125                 _copy __op__ _val;                                                    \
 126                 model_rmw_action_helper(addr, (uint64_t) _copy, atomic_index, position);        \
 127                 *((volatile uint ## size ## _t *)addr) = _copy;                  \
 128                 thread_id_t tid = thread_current_id();           \
 129                 for(int i=0;i < size / 8;i++) {                       \
 130                         atomraceCheckRead(tid,  (void *)(((char *)addr)+i));  \
 131                         recordWrite(tid, (void *)(((char *)addr)+i));         \
 132                 }                                                       \
 133                 return _old;                                            \
 134         })
 135
 136 // cds atomic exchange
 137 #define CDSATOMICEXCHANGE(size)                                         \
 138         uint ## size ## _t cds_atomic_exchange ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
 139                 _ATOMIC_RMW_( =, size, addr, val, atomic_index, position);          \
 140         }
 141
 142 CDSATOMICEXCHANGE(8)
 143 CDSATOMICEXCHANGE(16)
 144 CDSATOMICEXCHANGE(32)
 145 CDSATOMICEXCHANGE(64)
 146
 147 // cds atomic fetch add
 148 #define CDSATOMICADD(size)                                              \
 149         uint ## size ## _t cds_atomic_fetch_add ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
 150                 _ATOMIC_RMW_( +=, size, addr, val, atomic_index, position);         \
 151         }
 152
 153 CDSATOMICADD(8)
 154 CDSATOMICADD(16)
 155 CDSATOMICADD(32)
 156 CDSATOMICADD(64)
 157
 158 // cds atomic fetch sub
 159 #define CDSATOMICSUB(size)                                              \
 160         uint ## size ## _t cds_atomic_fetch_sub ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
 161                 _ATOMIC_RMW_( -=, size, addr, val, atomic_index, position);         \
 162         }
 163
 164 CDSATOMICSUB(8)
 165 CDSATOMICSUB(16)
 166 CDSATOMICSUB(32)
 167 CDSATOMICSUB(64)
 168
 169 // cds atomic fetch and
 170 #define CDSATOMICAND(size)                                              \
 171         uint ## size ## _t cds_atomic_fetch_and ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
 172                 _ATOMIC_RMW_( &=, size, addr, val, atomic_index, position);         \
 173         }
 174
 175 CDSATOMICAND(8)
 176 CDSATOMICAND(16)
 177 CDSATOMICAND(32)
 178 CDSATOMICAND(64)
 179
 180 // cds atomic fetch or
 181 #define CDSATOMICOR(size)                                               \
 182         uint ## size ## _t cds_atomic_fetch_or ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
 183                 _ATOMIC_RMW_( |=, size, addr, val, atomic_index, position);         \
 184         }
 185
 186 CDSATOMICOR(8)
 187 CDSATOMICOR(16)
 188 CDSATOMICOR(32)
 189 CDSATOMICOR(64)
 190
 191 // cds atomic fetch xor
 192 #define CDSATOMICXOR(size)                                              \
 193         uint ## size ## _t cds_atomic_fetch_xor ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
 194                 _ATOMIC_RMW_( ^=, size, addr, val, atomic_index, position);         \
 195         }
 196
 197 CDSATOMICXOR(8)
 198 CDSATOMICXOR(16)
 199 CDSATOMICXOR(32)
 200 CDSATOMICXOR(64)
 201
 202 // cds atomic compare and exchange
 203 // In order to accomodate the LLVM PASS, the return values are not true or false.
 204
 205 #define _ATOMIC_CMPSWP_WEAK_ _ATOMIC_CMPSWP_
 206 #define _ATOMIC_CMPSWP_(size, addr, expected, desired, atomic_index, position)                            \
 207         ({                                                                                              \
 208                 uint ## size ## _t _desired = desired;                                                            \
 209                 uint ## size ## _t _expected = expected;                                                          \
 210                 uint ## size ## _t _old = model_rmwrcas_action_helper(addr, atomic_index, _expected, sizeof(_expected), position); \
 211                 if (_old == _expected) {                                                                    \
 212                         model_rmw_action_helper(addr, (uint64_t) _desired, atomic_index, position); \
 213                         *((volatile uint ## size ## _t *)addr) = desired;                        \
 214                         thread_id_t tid = thread_current_id();           \
 215                         for(int i=0;i < size / 8;i++) {                       \
 216                                 recordWrite(tid, (void *)(((char *)addr)+i));         \
 217                         }                                                       \
 218                         return _expected; }                                     \
 219                 else {                                                                                        \
 220                         model_rmwc_action_helper(addr, atomic_index, position); _expected = _old; return _old; }              \
 221         })
 222
 223 // atomic_compare_exchange version 1: the CmpOperand (corresponds to expected)
 224 // extracted from LLVM IR is an integer type.
 225 #define CDSATOMICCASV1(size)                                            \
 226         uint ## size ## _t cds_atomic_compare_exchange ## size ## _v1(void* addr, uint ## size ## _t expected, uint ## size ## _t desired, int atomic_index_succ, int atomic_index_fail, const char *position) { \
 227                 _ATOMIC_CMPSWP_(size, addr, expected, desired, atomic_index_succ, position); \
 228         }
 229
 230 CDSATOMICCASV1(8)
 231 CDSATOMICCASV1(16)
 232 CDSATOMICCASV1(32)
 233 CDSATOMICCASV1(64)
 234
 235 // atomic_compare_exchange version 2
 236 #define CDSATOMICCASV2(size)                                            \
 237         bool cds_atomic_compare_exchange ## size ## _v2(void* addr, uint ## size ## _t* expected, uint ## size ## _t desired, int atomic_index_succ, int atomic_index_fail, const char *position) { \
 238                 uint ## size ## _t ret = cds_atomic_compare_exchange ## size ## _v1(addr, *expected, desired, atomic_index_succ, atomic_index_fail, position); \
 239                 if (ret == *expected) {return true;} else {return false;}               \
 240         }
 241
 242 CDSATOMICCASV2(8)
 243 CDSATOMICCASV2(16)
 244 CDSATOMICCASV2(32)
 245 CDSATOMICCASV2(64)
 246
 247 // cds atomic thread fence
 248
 249 void cds_atomic_thread_fence(int atomic_index, const char * position) {
 250         model->switch_thread(
 251                 new ModelAction(ATOMIC_FENCE, position, orders[atomic_index], FENCE_LOCATION)
 252                 );
 253 }
 254
 255 /*
 256  #define _ATOMIC_CMPSWP_( __a__, __e__, __m__, __x__ )                         \
 257         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 258                 __typeof__(__e__) __q__ = (__e__);                            \
 259                 __typeof__(__m__) __v__ = (__m__);                            \
 260                 bool __r__;                                                   \
 261                 __typeof__((__a__)->__f__) __t__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 262                 if (__t__ == * __q__ ) {                                      \
 263                         model_rmw_action((void *)__p__, __x__, (uint64_t) __v__); __r__ = true; } \
 264                 else {  model_rmwc_action((void *)__p__, __x__); *__q__ = __t__;  __r__ = false;} \
 265                 __r__; })
 266
 267  #define _ATOMIC_FENCE_( __x__ ) \
 268         ({ model_fence_action(__x__);})
 269  */
 270
 271 /*
 272
 273  #define _ATOMIC_MODIFY_( __a__, __o__, __m__, __x__ )                         \
 274         ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__);   \
 275         __typeof__((__a__)->__f__) __old__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
 276         __typeof__(__m__) __v__ = (__m__);                                    \
 277         __typeof__((__a__)->__f__) __copy__= __old__;                         \
 278         __copy__ __o__ __v__;                                                 \
 279         model_rmw_action((void *)__p__, __x__, (uint64_t) __copy__);          \
 280         __old__ = __old__;  Silence clang (-Wunused-value)                    \
 281          })
 282  */
 283
 284 void cds_func_entry(const char * funcName) {
 285 }
 286
 287 void cds_func_exit(const char * funcName) {
 288 }