Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 1 | //===-- sanitizer_deadlock_detector_interface.h -----------------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file is a part of Sanitizer runtime. |
| 11 | // Abstract deadlock detector interface. |
| 12 | // FIXME: this is work in progress, nothing really works yet. |
| 13 | // |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | |
| 16 | #ifndef SANITIZER_DEADLOCK_DETECTOR_INTERFACE_H |
| 17 | #define SANITIZER_DEADLOCK_DETECTOR_INTERFACE_H |
| 18 | |
| 19 | #ifndef SANITIZER_DEADLOCK_DETECTOR_VERSION |
| 20 | # define SANITIZER_DEADLOCK_DETECTOR_VERSION 1 |
| 21 | #endif |
| 22 | |
| 23 | #include "sanitizer_internal_defs.h" |
| 24 | #include "sanitizer_atomic.h" |
| 25 | |
| 26 | namespace __sanitizer { |
| 27 | |
| 28 | // dd - deadlock detector. |
| 29 | // lt - logical (user) thread. |
| 30 | // pt - physical (OS) thread. |
| 31 | |
| 32 | struct DDPhysicalThread; |
| 33 | struct DDLogicalThread; |
| 34 | |
| 35 | struct DDMutex { |
| 36 | #if SANITIZER_DEADLOCK_DETECTOR_VERSION == 1 |
| 37 | uptr id; |
| 38 | u32 stk; // creation stack |
| 39 | #elif SANITIZER_DEADLOCK_DETECTOR_VERSION == 2 |
| 40 | u32 id; |
| 41 | u32 recursion; |
| 42 | atomic_uintptr_t owner; |
| 43 | #else |
| 44 | # error "BAD SANITIZER_DEADLOCK_DETECTOR_VERSION" |
| 45 | #endif |
| 46 | u64 ctx; |
| 47 | }; |
| 48 | |
| 49 | struct DDFlags { |
| 50 | bool second_deadlock_stack; |
| 51 | }; |
| 52 | |
| 53 | struct DDReport { |
| 54 | enum { kMaxLoopSize = 8 }; |
| 55 | int n; // number of entries in loop |
| 56 | struct { |
| 57 | u64 thr_ctx; // user thread context |
| 58 | u64 mtx_ctx0; // user mutex context, start of the edge |
| 59 | u64 mtx_ctx1; // user mutex context, end of the edge |
| 60 | u32 stk[2]; // stack ids for the edge |
| 61 | } loop[kMaxLoopSize]; |
| 62 | }; |
| 63 | |
| 64 | struct DDCallback { |
| 65 | DDPhysicalThread *pt; |
| 66 | DDLogicalThread *lt; |
| 67 | |
| 68 | virtual u32 Unwind() { return 0; } |
| 69 | virtual int UniqueTid() { return 0; } |
| 70 | }; |
| 71 | |
| 72 | struct DDetector { |
| 73 | static DDetector *Create(const DDFlags *flags); |
| 74 | |
| 75 | virtual DDPhysicalThread* CreatePhysicalThread() { return 0; } |
| 76 | virtual void DestroyPhysicalThread(DDPhysicalThread *pt) {} |
| 77 | |
| 78 | virtual DDLogicalThread* CreateLogicalThread(u64 ctx) { return 0; } |
| 79 | virtual void DestroyLogicalThread(DDLogicalThread *lt) {} |
| 80 | |
| 81 | virtual void MutexInit(DDCallback *cb, DDMutex *m) {} |
| 82 | virtual void MutexBeforeLock(DDCallback *cb, DDMutex *m, bool wlock) {} |
| 83 | virtual void MutexAfterLock(DDCallback *cb, DDMutex *m, bool wlock, |
| 84 | bool trylock) {} |
| 85 | virtual void MutexBeforeUnlock(DDCallback *cb, DDMutex *m, bool wlock) {} |
| 86 | virtual void MutexDestroy(DDCallback *cb, DDMutex *m) {} |
| 87 | |
| 88 | virtual DDReport *GetReport(DDCallback *cb) { return 0; } |
| 89 | }; |
| 90 | |
| 91 | } // namespace __sanitizer |
| 92 | |
| 93 | #endif // SANITIZER_DEADLOCK_DETECTOR_INTERFACE_H |