2 * @brief Data race detection code.
10 #include "modeltypes.h"
11 #include "classlist.h"
18 struct ShadowBaseTable {
19 uint64_t array[65536];
23 /* Clock and thread associated with first action. This won't change in
24 response to synchronization. */
26 thread_id_t oldthread;
27 modelclock_t oldclock;
28 /* Record whether this is a write, so we can tell the user. */
31 /* Model action associated with second action. This could change as
32 a result of synchronization. */
33 ModelAction *newaction;
34 /* Record whether this is a write, so we can tell the user. */
37 /* Address of data race. */
43 #define MASK16BIT 0xffff
45 void initRaceDetector();
46 void raceCheckWrite(thread_id_t thread, void *location);
47 void raceCheckRead(thread_id_t thread, const void *location);
48 void recordWrite(thread_id_t thread, void *location);
49 void assert_race(struct DataRace *race);
50 bool hasNonAtomicStore(const void *location);
51 void setAtomicStoreFlag(const void *location);
52 void getStoreThreadAndClock(const void *address, thread_id_t * thread, modelclock_t * clock);
55 * @brief A record of information for detecting data races
58 modelclock_t *readClock;
62 thread_id_t writeThread;
63 modelclock_t writeClock;
66 unsigned int race_hash(struct DataRace *race);
67 bool race_equals(struct DataRace *r1, struct DataRace *r2);
69 #define INITCAPACITY 4
71 #define ISSHORTRECORD(x) ((x)&0x1)
73 #define THREADMASK 0x3f
74 #define RDTHREADID(x) (((x)>>1)&THREADMASK)
75 #define READMASK 0x1ffffff
76 #define READVECTOR(x) (((x)>>7)&READMASK)
78 #define WRTHREADID(x) (((x)>>32)&THREADMASK)
80 #define WRITEMASK READMASK
81 #define WRITEVECTOR(x) (((x)>>38)&WRITEMASK)
83 #define ATOMICMASK (0x1ULL << 63)
84 #define NONATOMICMASK ~(0x1ULL << 63)
87 * The basic encoding idea is that (void *) either:
88 * -# points to a full record (RaceRecord) or
89 * -# encodes the information in a 64 bit word. Encoding is as
91 * - lowest bit set to 1
92 * - next 6 bits are read thread id
93 * - next 25 bits are read clock vector
94 * - next 6 bits are write thread id
95 * - next 25 bits are write clock vector
96 * - highest bit is 1 if the write is from an atomic
98 #define ENCODEOP(rdthread, rdtime, wrthread, wrtime) (0x1ULL | ((rdthread)<<1) | ((rdtime) << 7) | (((uint64_t)wrthread)<<32) | (((uint64_t)wrtime)<<38))
100 #define MAXTHREADID (THREADMASK-1)
101 #define MAXREADVECTOR (READMASK-1)
102 #define MAXWRITEVECTOR (WRITEMASK-1)
104 typedef HashSet<struct DataRace *, uintptr_t, 0, model_malloc, model_calloc, model_free, race_hash, race_equals> RaceSet;
106 #endif /* __DATARACE_H__ */