1 //===-- tsan_mutex.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_MUTEX_H 12 #define TSAN_MUTEX_H 13 14 #include "sanitizer_common/sanitizer_atomic.h" 15 #include "sanitizer_common/sanitizer_mutex.h" 16 #include "tsan_defs.h" 17 18 namespace __tsan { 19 20 enum MutexType { 21 MutexTypeInvalid, 22 MutexTypeTrace, 23 MutexTypeThreads, 24 MutexTypeReport, 25 MutexTypeSyncVar, 26 MutexTypeSyncTab, 27 MutexTypeSlab, 28 MutexTypeAnnotations, 29 MutexTypeAtExit, 30 MutexTypeMBlock, 31 MutexTypeJavaMBlock, 32 MutexTypeDDetector, 33 MutexTypeFired, 34 MutexTypeRacy, 35 MutexTypeGlobalProc, 36 37 // This must be the last. 38 MutexTypeCount 39 }; 40 41 class Mutex { 42 public: 43 explicit Mutex(MutexType type, StatType stat_type); 44 ~Mutex(); 45 46 void Lock(); 47 void Unlock(); 48 49 void ReadLock(); 50 void ReadUnlock(); 51 52 void CheckLocked(); 53 54 private: 55 atomic_uintptr_t state_; 56 #if SANITIZER_DEBUG 57 MutexType type_; 58 #endif 59 #if TSAN_COLLECT_STATS 60 StatType stat_type_; 61 #endif 62 63 Mutex(const Mutex&); 64 void operator = (const Mutex&); 65 }; 66 67 typedef GenericScopedLock<Mutex> Lock; 68 typedef GenericScopedReadLock<Mutex> ReadLock; 69 70 class InternalDeadlockDetector { 71 public: 72 InternalDeadlockDetector(); 73 void Lock(MutexType t); 74 void Unlock(MutexType t); 75 void CheckNoLocks(); 76 private: 77 u64 seq_; 78 u64 locked_[MutexTypeCount]; 79 }; 80 81 void InitializeMutex(); 82 83 // Checks that the current thread does not hold any runtime locks 84 // (e.g. when returning from an interceptor). 85 void CheckNoLocks(ThreadState *thr); 86 87 } // namespace __tsan 88 89 #endif // TSAN_MUTEX_H 90