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);
50 void atomraceCheckRead(thread_id_t thread, const void *location);
51 void recordWrite(thread_id_t thread, void *location);
52 void recordCalloc(void *location, size_t size);
53 void assert_race(struct DataRace *race);
54 bool hasNonAtomicStore(const void *location);
55 void setAtomicStoreFlag(const void *location);
56 void getStoreThreadAndClock(const void *address, thread_id_t * thread, modelclock_t * clock);
58 void raceCheckRead8(thread_id_t thread, const void *location);
59 void raceCheckRead16(thread_id_t thread, const void *location);
60 void raceCheckRead32(thread_id_t thread, const void *location);
61 void raceCheckRead64(thread_id_t thread, const void *location);
63 void raceCheckWrite8(thread_id_t thread, const void *location);
64 void raceCheckWrite16(thread_id_t thread, const void *location);
65 void raceCheckWrite32(thread_id_t thread, const void *location);
66 void raceCheckWrite64(thread_id_t thread, const void *location);
69 * @brief A record of information for detecting data races
72 modelclock_t *readClock;
76 thread_id_t writeThread;
77 modelclock_t writeClock;
80 unsigned int race_hash(struct DataRace *race);
81 bool race_equals(struct DataRace *r1, struct DataRace *r2);
83 #define INITCAPACITY 4
85 #define ISSHORTRECORD(x) ((x)&0x1)
87 #define THREADMASK 0x3f
88 #define RDTHREADID(x) (((x)>>1)&THREADMASK)
89 #define READMASK 0x1ffffff
90 #define READVECTOR(x) (((x)>>7)&READMASK)
92 #define WRTHREADID(x) (((x)>>32)&THREADMASK)
94 #define WRITEMASK READMASK
95 #define WRITEVECTOR(x) (((x)>>38)&WRITEMASK)
97 #define ATOMICMASK (0x1ULL << 63)
98 #define NONATOMICMASK ~(0x1ULL << 63)
101 * The basic encoding idea is that (void *) either:
102 * -# points to a full record (RaceRecord) or
103 * -# encodes the information in a 64 bit word. Encoding is as
105 * - lowest bit set to 1
106 * - next 6 bits are read thread id
107 * - next 25 bits are read clock vector
108 * - next 6 bits are write thread id
109 * - next 25 bits are write clock vector
110 * - highest bit is 1 if the write is from an atomic
112 #define ENCODEOP(rdthread, rdtime, wrthread, wrtime) (0x1ULL | ((rdthread)<<1) | ((rdtime) << 7) | (((uint64_t)wrthread)<<32) | (((uint64_t)wrtime)<<38))
114 #define MAXTHREADID (THREADMASK-1)
115 #define MAXREADVECTOR (READMASK-1)
116 #define MAXWRITEVECTOR (WRITEMASK-1)
118 #define INVALIDSHADOWVAL 0x2ULL
119 #define CHECKBOUNDARY(location, bits) ((((uintptr_t)location & MASK16BIT) + bits) <= MASK16BIT)
121 typedef HashSet<struct DataRace *, uintptr_t, 0, model_malloc, model_calloc, model_free, race_hash, race_equals> RaceSet;
123 #endif /* __DATARACE_H__ */