1 //===-- tsan_trace.h --------------------------------------------*- C++ -*-===// 2 // 3 // This file is distributed under the University of Illinois Open Source 4 // License. See LICENSE.TXT for details. 5 // 6 //===----------------------------------------------------------------------===// 7 // 8 // This file is a part of ThreadSanitizer (TSan), a race detector. 9 // 10 //===----------------------------------------------------------------------===// 11 #ifndef TSAN_TRACE_H 12 #define TSAN_TRACE_H 13 14 #include "tsan_defs.h" 15 #include "tsan_mutex.h" 16 #include "tsan_sync.h" 17 #include "tsan_mutexset.h" 18 19 namespace __tsan { 20 21 const int kTracePartSizeBits = 14; 22 const int kTracePartSize = 1 << kTracePartSizeBits; 23 const int kTraceParts = 4 * 1024 * 1024 / kTracePartSize; 24 const int kTraceSize = kTracePartSize * kTraceParts; 25 26 // Must fit into 3 bits. 27 enum EventType { 28 EventTypeMop, 29 EventTypeFuncEnter, 30 EventTypeFuncExit, 31 EventTypeLock, 32 EventTypeUnlock, 33 EventTypeRLock, 34 EventTypeRUnlock 35 }; 36 37 // Represents a thread event (from most significant bit): 38 // u64 typ : 3; // EventType. 39 // u64 addr : 61; // Associated pc. 40 typedef u64 Event; 41 42 struct TraceHeader { 43 StackTrace stack0; // Start stack for the trace. 44 u64 epoch0; // Start epoch for the trace. 45 MutexSet mset0; 46 #ifndef TSAN_GO 47 uptr stack0buf[kTraceStackSize]; 48 #endif 49 50 TraceHeader() 51 #ifndef TSAN_GO 52 : stack0(stack0buf, kTraceStackSize) 53 #else 54 : stack0() 55 #endif 56 , epoch0() { 57 } 58 }; 59 60 struct Trace { 61 TraceHeader headers[kTraceParts]; 62 Mutex mtx; 63 64 Trace() 65 : mtx(MutexTypeTrace, StatMtxTrace) { 66 } 67 }; 68 69 } // namespace __tsan 70 71 #endif // TSAN_TRACE_H 72