+#include <stdio.h>
+#include <string>
+
#include "model.h"
+#include "execution.h"
+#include "action.h"
+#include "history.h"
#include "cmodelint.h"
+#include "snapshot-interface.h"
+#include "threads-model.h"
+#include "datarace.h"
+
+memory_order orders[6] = {
+ memory_order_relaxed, memory_order_consume, memory_order_acquire,
+ memory_order_release, memory_order_acq_rel, memory_order_seq_cst,
+};
-/** Performs a read action.*/
-uint64_t model_read_action(void * obj, memory_order ord) {
- model->switch_to_master(new ModelAction(ATOMIC_READ, ord, obj));
- return thread_current()->get_return_value();
+static void ensureModel() {
+ if (!model) {
+ snapshot_system_init(10000, 1024, 1024, 40000);
+ model = new ModelChecker();
+ model->startChecker();
+ }
}
-/** Performs a write action.*/
-void model_write_action(void * obj, memory_order ord, uint64_t val) {
- model->switch_to_master(new ModelAction(ATOMIC_WRITE, ord, obj, val));
+/* --- helper functions --- */
+uint64_t model_rmwrcas_action_helper(void *obj, int atomic_index, uint64_t oldval, int size, const char *position) {
+ ensureModel();
+ return model->switch_thread(new ModelAction(ATOMIC_RMWRCAS, position, orders[atomic_index], obj, oldval, size));
}
-/** Performs an init action. */
-void model_init_action(void * obj, uint64_t val) {
- model->switch_to_master(new ModelAction(ATOMIC_INIT, memory_order_relaxed, obj, val));
+uint64_t model_rmwr_action_helper(void *obj, int atomic_index, const char *position) {
+ ensureModel();
+ return model->switch_thread(new ModelAction(ATOMIC_RMWR, position, orders[atomic_index], obj));
}
-/**
- * Performs the read part of a RMW action. The next action must either be the
- * write part of the RMW action or an explicit close out of the RMW action w/o
- * a write.
- */
-uint64_t model_rmwr_action(void *obj, memory_order ord) {
- model->switch_to_master(new ModelAction(ATOMIC_RMWR, ord, obj));
- return thread_current()->get_return_value();
+void model_rmw_action_helper(void *obj, uint64_t val, int atomic_index, const char * position) {
+ ensureModel();
+ model->switch_thread(new ModelAction(ATOMIC_RMW, position, orders[atomic_index], obj, val));
}
-/** Performs the write part of a RMW action. */
-void model_rmw_action(void *obj, memory_order ord, uint64_t val) {
- model->switch_to_master(new ModelAction(ATOMIC_RMW, ord, obj, val));
+void model_rmwc_action_helper(void *obj, int atomic_index, const char *position) {
+ ensureModel();
+ model->switch_thread(new ModelAction(ATOMIC_RMWC, position, orders[atomic_index], obj));
}
-/** Closes out a RMW action without doing a write. */
-void model_rmwc_action(void *obj, memory_order ord) {
- model->switch_to_master(new ModelAction(ATOMIC_RMWC, ord, obj));
+// cds volatile loads
+#define VOLATILELOAD(size) \
+ uint ## size ## _t cds_volatile_load ## size(void * obj, const char * position) { \
+ ensureModel(); \
+ return (uint ## size ## _t)model->switch_thread(new ModelAction(ATOMIC_READ, position, memory_order_volatile_load, obj)); \
+ }
+
+VOLATILELOAD(8)
+VOLATILELOAD(16)
+VOLATILELOAD(32)
+VOLATILELOAD(64)
+
+// cds volatile stores
+#define VOLATILESTORE(size) \
+ void cds_volatile_store ## size (void * obj, uint ## size ## _t val, const char * position) { \
+ ensureModel(); \
+ model->switch_thread(new ModelAction(ATOMIC_WRITE, position, memory_order_volatile_store, obj, (uint64_t) val)); \
+ *((volatile uint ## size ## _t *)obj) = val; \
+ thread_id_t tid = thread_current_id(); \
+ for(int i=0;i < size / 8;i++) { \
+ atomraceCheckWrite(tid, (void *)(((char *)obj)+i)); \
+ } \
+ }
+
+VOLATILESTORE(8)
+VOLATILESTORE(16)
+VOLATILESTORE(32)
+VOLATILESTORE(64)
+
+// cds atomic inits
+#define CDSATOMICINT(size) \
+ void cds_atomic_init ## size (void * obj, uint ## size ## _t val, const char * position) { \
+ ensureModel(); \
+ model->switch_thread(new ModelAction(ATOMIC_INIT, position, memory_order_relaxed, obj, (uint64_t) val)); \
+ *((volatile uint ## size ## _t *)obj) = val; \
+ thread_id_t tid = thread_current_id(); \
+ for(int i=0;i < size / 8;i++) { \
+ atomraceCheckWrite(tid, (void *)(((char *)obj)+i)); \
+ } \
+ }
+
+CDSATOMICINT(8)
+CDSATOMICINT(16)
+CDSATOMICINT(32)
+CDSATOMICINT(64)
+
+// cds atomic loads
+#define CDSATOMICLOAD(size) \
+ uint ## size ## _t cds_atomic_load ## size(void * obj, int atomic_index, const char * position) { \
+ ensureModel(); \
+ uint ## size ## _t val = (uint ## size ## _t)model->switch_thread( \
+ new ModelAction(ATOMIC_READ, position, orders[atomic_index], obj)); \
+ thread_id_t tid = thread_current_id(); \
+ for(int i=0;i < size / 8;i++) { \
+ atomraceCheckRead(tid, (void *)(((char *)obj)+i)); \
+ } \
+ return val; \
+ }
+
+CDSATOMICLOAD(8)
+CDSATOMICLOAD(16)
+CDSATOMICLOAD(32)
+CDSATOMICLOAD(64)
+
+// cds atomic stores
+#define CDSATOMICSTORE(size) \
+ void cds_atomic_store ## size(void * obj, uint ## size ## _t val, int atomic_index, const char * position) { \
+ ensureModel(); \
+ model->switch_thread(new ModelAction(ATOMIC_WRITE, position, orders[atomic_index], obj, (uint64_t) val)); \
+ *((volatile uint ## size ## _t *)obj) = val; \
+ thread_id_t tid = thread_current_id(); \
+ for(int i=0;i < size / 8;i++) { \
+ atomraceCheckWrite(tid, (void *)(((char *)obj)+i)); \
+ } \
+ }
+
+CDSATOMICSTORE(8)
+CDSATOMICSTORE(16)
+CDSATOMICSTORE(32)
+CDSATOMICSTORE(64)
+
+
+#define _ATOMIC_RMW_(__op__, size, addr, val, atomic_index, position) \
+ ({ \
+ uint ## size ## _t _old = model_rmwr_action_helper(addr, atomic_index, position); \
+ uint ## size ## _t _copy = _old; \
+ uint ## size ## _t _val = val; \
+ _copy __op__ _val; \
+ model_rmw_action_helper(addr, (uint64_t) _copy, atomic_index, position); \
+ *((volatile uint ## size ## _t *)addr) = _copy; \
+ thread_id_t tid = thread_current_id(); \
+ for(int i=0;i < size / 8;i++) { \
+ atomraceCheckRead(tid, (void *)(((char *)addr)+i)); \
+ recordWrite(tid, (void *)(((char *)addr)+i)); \
+ } \
+ return _old; \
+ })
+
+// cds atomic exchange
+#define CDSATOMICEXCHANGE(size) \
+ uint ## size ## _t cds_atomic_exchange ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
+ _ATOMIC_RMW_( =, size, addr, val, atomic_index, position); \
+ }
+
+CDSATOMICEXCHANGE(8)
+CDSATOMICEXCHANGE(16)
+CDSATOMICEXCHANGE(32)
+CDSATOMICEXCHANGE(64)
+
+// cds atomic fetch add
+#define CDSATOMICADD(size) \
+ uint ## size ## _t cds_atomic_fetch_add ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
+ _ATOMIC_RMW_( +=, size, addr, val, atomic_index, position); \
+ }
+
+CDSATOMICADD(8)
+CDSATOMICADD(16)
+CDSATOMICADD(32)
+CDSATOMICADD(64)
+
+// cds atomic fetch sub
+#define CDSATOMICSUB(size) \
+ uint ## size ## _t cds_atomic_fetch_sub ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
+ _ATOMIC_RMW_( -=, size, addr, val, atomic_index, position); \
+ }
+
+CDSATOMICSUB(8)
+CDSATOMICSUB(16)
+CDSATOMICSUB(32)
+CDSATOMICSUB(64)
+
+// cds atomic fetch and
+#define CDSATOMICAND(size) \
+ uint ## size ## _t cds_atomic_fetch_and ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
+ _ATOMIC_RMW_( &=, size, addr, val, atomic_index, position); \
+ }
+
+CDSATOMICAND(8)
+CDSATOMICAND(16)
+CDSATOMICAND(32)
+CDSATOMICAND(64)
+
+// cds atomic fetch or
+#define CDSATOMICOR(size) \
+ uint ## size ## _t cds_atomic_fetch_or ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
+ _ATOMIC_RMW_( |=, size, addr, val, atomic_index, position); \
+ }
+
+CDSATOMICOR(8)
+CDSATOMICOR(16)
+CDSATOMICOR(32)
+CDSATOMICOR(64)
+
+// cds atomic fetch xor
+#define CDSATOMICXOR(size) \
+ uint ## size ## _t cds_atomic_fetch_xor ## size(void* addr, uint ## size ## _t val, int atomic_index, const char * position) { \
+ _ATOMIC_RMW_( ^=, size, addr, val, atomic_index, position); \
+ }
+
+CDSATOMICXOR(8)
+CDSATOMICXOR(16)
+CDSATOMICXOR(32)
+CDSATOMICXOR(64)
+
+// cds atomic compare and exchange
+// In order to accomodate the LLVM PASS, the return values are not true or false.
+
+#define _ATOMIC_CMPSWP_WEAK_ _ATOMIC_CMPSWP_
+#define _ATOMIC_CMPSWP_(size, addr, expected, desired, atomic_index, position) \
+ ({ \
+ uint ## size ## _t _desired = desired; \
+ uint ## size ## _t _expected = expected; \
+ uint ## size ## _t _old = model_rmwrcas_action_helper(addr, atomic_index, _expected, sizeof(_expected), position); \
+ if (_old == _expected) { \
+ model_rmw_action_helper(addr, (uint64_t) _desired, atomic_index, position); \
+ *((volatile uint ## size ## _t *)addr) = desired; \
+ thread_id_t tid = thread_current_id(); \
+ for(int i=0;i < size / 8;i++) { \
+ recordWrite(tid, (void *)(((char *)addr)+i)); \
+ } \
+ return _expected; } \
+ else { \
+ model_rmwc_action_helper(addr, atomic_index, position); _expected = _old; return _old; } \
+ })
+
+// atomic_compare_exchange version 1: the CmpOperand (corresponds to expected)
+// extracted from LLVM IR is an integer type.
+#define CDSATOMICCASV1(size) \
+ 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) { \
+ _ATOMIC_CMPSWP_(size, addr, expected, desired, atomic_index_succ, position); \
+ }
+
+CDSATOMICCASV1(8)
+CDSATOMICCASV1(16)
+CDSATOMICCASV1(32)
+CDSATOMICCASV1(64)
+
+// atomic_compare_exchange version 2
+#define CDSATOMICCASV2(size) \
+ 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) { \
+ uint ## size ## _t ret = cds_atomic_compare_exchange ## size ## _v1(addr, *expected, desired, atomic_index_succ, atomic_index_fail, position); \
+ if (ret == *expected) {return true;} else {return false;} \
+ }
+
+CDSATOMICCASV2(8)
+CDSATOMICCASV2(16)
+CDSATOMICCASV2(32)
+CDSATOMICCASV2(64)
+
+// cds atomic thread fence
+
+void cds_atomic_thread_fence(int atomic_index, const char * position) {
+ model->switch_thread(
+ new ModelAction(ATOMIC_FENCE, position, orders[atomic_index], FENCE_LOCATION)
+ );
+}
+
+/*
+ #define _ATOMIC_CMPSWP_( __a__, __e__, __m__, __x__ ) \
+ ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__); \
+ __typeof__(__e__) __q__ = (__e__); \
+ __typeof__(__m__) __v__ = (__m__); \
+ bool __r__; \
+ __typeof__((__a__)->__f__) __t__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
+ if (__t__ == * __q__ ) { \
+ model_rmw_action((void *)__p__, __x__, (uint64_t) __v__); __r__ = true; } \
+ else { model_rmwc_action((void *)__p__, __x__); *__q__ = __t__; __r__ = false;} \
+ __r__; })
+
+ #define _ATOMIC_FENCE_( __x__ ) \
+ ({ model_fence_action(__x__);})
+ */
+
+/*
+
+ #define _ATOMIC_MODIFY_( __a__, __o__, __m__, __x__ ) \
+ ({ volatile __typeof__((__a__)->__f__)* __p__ = & ((__a__)->__f__); \
+ __typeof__((__a__)->__f__) __old__=(__typeof__((__a__)->__f__)) model_rmwr_action((void *)__p__, __x__); \
+ __typeof__(__m__) __v__ = (__m__); \
+ __typeof__((__a__)->__f__) __copy__= __old__; \
+ __copy__ __o__ __v__; \
+ model_rmw_action((void *)__p__, __x__, (uint64_t) __copy__); \
+ __old__ = __old__; Silence clang (-Wunused-value) \
+ })
+ */
+
+void cds_func_entry(const char * funcName) {
+#ifdef NEWFUZZER
+ ensureModel();
+ thread_id_t tid = thread_current_id();
+ uint32_t func_id;
+
+ ModelHistory *history = model->get_history();
+ if ( !history->getFuncMap()->contains(funcName) ) {
+ // add func id to func map
+ func_id = history->get_func_counter();
+ history->incr_func_counter();
+ history->getFuncMap()->put(funcName, func_id);
+
+ // add func id to reverse func map
+ ModelVector<const char *> * func_map_rev = history->getFuncMapRev();
+ if ( func_map_rev->size() <= func_id )
+ func_map_rev->resize( func_id + 1 );
+
+ func_map_rev->at(func_id) = funcName;
+ } else {
+ func_id = history->getFuncMap()->get(funcName);
+ }
+
+ history->enter_function(func_id, tid);
+#endif
+}
+
+void cds_func_exit(const char * funcName) {
+#ifdef NEWFUZZER
+ ensureModel();
+ thread_id_t tid = thread_current_id();
+ uint32_t func_id;
+
+ ModelHistory *history = model->get_history();
+ func_id = history->getFuncMap()->get(funcName);
+/*
+ * func_id not found; this could happen in the case where a function calls cds_func_entry
+ * when the model has been defined yet, but then an atomic inside the function initializes
+ * the model. And then cds_func_exit is called upon the function exiting.
+ *
+ */
+ if (func_id == 0)
+ return;
+
+ history->exit_function(func_id, tid);
+#endif
}
projects / c11tester.git / blobdiff