| //===-- tsan_mutexset.h -----------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of ThreadSanitizer (TSan), a race detector. |
| // |
| // MutexSet holds the set of mutexes currently held by a thread. |
| //===----------------------------------------------------------------------===// |
| #ifndef TSAN_MUTEXSET_H |
| #define TSAN_MUTEXSET_H |
| |
| #include "tsan_defs.h" |
| |
| namespace __tsan { |
| |
| class MutexSet { |
| public: |
| // Holds limited number of mutexes. |
| // The oldest mutexes are discarded on overflow. |
| static const uptr kMaxSize = 64; |
| struct Desc { |
| u64 id; |
| u64 epoch; |
| int count; |
| bool write; |
| }; |
| |
| MutexSet(); |
| // The 'id' is obtained from SyncVar::GetId(). |
| void Add(u64 id, bool write, u64 epoch); |
| void Del(u64 id, bool write); |
| void Remove(u64 id); // Removes the mutex completely (if it's destroyed). |
| uptr Size() const; |
| Desc Get(uptr i) const; |
| |
| private: |
| #ifndef TSAN_GO |
| uptr size_; |
| Desc descs_[kMaxSize]; |
| #endif |
| |
| void RemovePos(uptr i); |
| }; |
| |
| // Go does not have mutexes, so do not spend memory and time. |
| // (Go sync.Mutex is actually a semaphore -- can be unlocked |
| // in different goroutine). |
| #ifdef TSAN_GO |
| MutexSet::MutexSet() {} |
| void MutexSet::Add(u64 id, bool write, u64 epoch) {} |
| void MutexSet::Del(u64 id, bool write) {} |
| void MutexSet::Remove(u64 id) {} |
| void MutexSet::RemovePos(uptr i) {} |
| uptr MutexSet::Size() const { return 0; } |
| MutexSet::Desc MutexSet::Get(uptr i) const { return Desc(); } |
| #endif |
| |
| } // namespace __tsan |
| |
| #endif // TSAN_REPORT_H |