2 * @brief Data race detection code.
8 #include "modeltypes.h"
11 /* Forward declaration */
19 struct ShadowBaseTable {
20 uint64_t array[65536];
24 /* Clock and thread associated with first action. This won't change in
25 response to synchronization. */
27 thread_id_t oldthread;
28 modelclock_t oldclock;
29 /* Record whether this is a write, so we can tell the user. */
32 /* Model action associated with second action. This could change as
33 a result of synchronization. */
34 ModelAction *newaction;
35 /* Record whether this is a write, so we can tell the user. */
38 /* Address of data race. */
42 #define MASK16BIT 0xffff
44 void initRaceDetector();
45 void raceCheckWrite(thread_id_t thread, void *location, ClockVector *currClock);
46 void raceCheckRead(thread_id_t thread, const void *location, ClockVector *currClock);
47 bool checkDataRaces();
48 void assert_race(struct DataRace *race);
50 extern SnapVector<struct DataRace *> unrealizedraces;
52 /** Basic encoding idea:
54 * (1) points to a full record or
56 * (2) encodes the information in a 64 bit word. Encoding is as
57 * follows: lowest bit set to 1, next 8 bits are read thread id, next
58 * 23 bits are read clock vector, next 8 bites are write thread id,
59 * next 23 bits are write clock vector. */
62 modelclock_t *readClock;
66 thread_id_t writeThread;
67 modelclock_t writeClock;
70 #define INITCAPACITY 4
72 #define ISSHORTRECORD(x) ((x)&0x1)
74 #define THREADMASK 0xff
75 #define RDTHREADID(x) (((x)>>1)&THREADMASK)
76 #define READMASK 0x07fffff
77 #define READVECTOR(x) (((x)>>9)&READMASK)
79 #define WRTHREADID(x) (((x)>>32)&THREADMASK)
81 #define WRITEMASK READMASK
82 #define WRITEVECTOR(x) (((x)>>40)&WRITEMASK)
84 #define ENCODEOP(rdthread, rdtime, wrthread, wrtime) (0x1ULL | ((rdthread)<<1) | ((rdtime) << 9) | (((uint64_t)wrthread)<<32) | (((uint64_t)wrtime)<<40))
86 #define MAXTHREADID (THREADMASK-1)
87 #define MAXREADVECTOR (READMASK-1)
88 #define MAXWRITEVECTOR (WRITEMASK-1)