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 atomraceCheckWrite(thread_id_t thread, void *location);
48 void raceCheckRead(thread_id_t thread, const void *location);
49 void atomraceCheckRead(thread_id_t thread, const void *location);
50 void recordWrite(thread_id_t thread, void *location);
51 void recordCalloc(void *location, size_t size);
52 void assert_race(struct DataRace *race);
53 bool hasNonAtomicStore(const void *location);
54 void setAtomicStoreFlag(const void *location);
55 void getStoreThreadAndClock(const void *address, thread_id_t * thread, modelclock_t * clock);
58 * @brief A record of information for detecting data races
61 modelclock_t *readClock;
65 thread_id_t writeThread;
66 modelclock_t writeClock;
69 unsigned int race_hash(struct DataRace *race);
70 bool race_equals(struct DataRace *r1, struct DataRace *r2);
72 #define INITCAPACITY 4
74 #define ISSHORTRECORD(x) ((x)&0x1)
76 #define THREADMASK 0x3f
77 #define RDTHREADID(x) (((x)>>1)&THREADMASK)
78 #define READMASK 0x1ffffff
79 #define READVECTOR(x) (((x)>>7)&READMASK)
81 #define WRTHREADID(x) (((x)>>32)&THREADMASK)
83 #define WRITEMASK READMASK
84 #define WRITEVECTOR(x) (((x)>>38)&WRITEMASK)
86 #define ATOMICMASK (0x1ULL << 63)
87 #define NONATOMICMASK ~(0x1ULL << 63)
90 * The basic encoding idea is that (void *) either:
91 * -# points to a full record (RaceRecord) or
92 * -# encodes the information in a 64 bit word. Encoding is as
94 * - lowest bit set to 1
95 * - next 6 bits are read thread id
96 * - next 25 bits are read clock vector
97 * - next 6 bits are write thread id
98 * - next 25 bits are write clock vector
99 * - highest bit is 1 if the write is from an atomic
101 #define ENCODEOP(rdthread, rdtime, wrthread, wrtime) (0x1ULL | ((rdthread)<<1) | ((rdtime) << 7) | (((uint64_t)wrthread)<<32) | (((uint64_t)wrtime)<<38))
103 #define MAXTHREADID (THREADMASK-1)
104 #define MAXREADVECTOR (READMASK-1)
105 #define MAXWRITEVECTOR (WRITEMASK-1)
107 typedef HashSet<struct DataRace *, uintptr_t, 0, model_malloc, model_calloc, model_free, race_hash, race_equals> RaceSet;
109 #endif /* __DATARACE_H__ */