diff options
Diffstat (limited to 'src/sync.cpp')
-rw-r--r-- | src/sync.cpp | 49 |
1 files changed, 10 insertions, 39 deletions
diff --git a/src/sync.cpp b/src/sync.cpp index 1837e8d53d..a422939964 100644 --- a/src/sync.cpp +++ b/src/sync.cpp @@ -33,22 +33,20 @@ void PrintLockContention(const char* pszName, const char* pszFile, int nLine) // struct CLockLocation { - CLockLocation(const char* pszName, const char* pszFile, int nLine, bool fTryIn) + CLockLocation(const char* pszName, const char* pszFile, int nLine) { mutexName = pszName; sourceFile = pszFile; sourceLine = nLine; - fTry = fTryIn; } std::string ToString() const { - return mutexName + " " + sourceFile + ":" + itostr(sourceLine) + (fTry ? " (TRY)" : ""); + return mutexName + " " + sourceFile + ":" + itostr(sourceLine); } std::string MutexName() const { return mutexName; } - bool fTry; private: std::string mutexName; std::string sourceFile; @@ -64,52 +62,23 @@ static boost::thread_specific_ptr<LockStack> lockstack; static void potential_deadlock_detected(const std::pair<void*, void*>& mismatch, const LockStack& s1, const LockStack& s2) { - // We attempt to not assert on probably-not deadlocks by assuming that - // a try lock will immediately have otherwise bailed if it had - // failed to get the lock - // We do this by, for the locks which triggered the potential deadlock, - // in either lockorder, checking that the second of the two which is locked - // is only a TRY_LOCK, ignoring locks if they are reentrant. - bool firstLocked = false; - bool secondLocked = false; - bool onlyMaybeDeadlock = false; - LogPrintf("POTENTIAL DEADLOCK DETECTED\n"); LogPrintf("Previous lock order was:\n"); BOOST_FOREACH (const PAIRTYPE(void*, CLockLocation) & i, s2) { - if (i.first == mismatch.first) { + if (i.first == mismatch.first) LogPrintf(" (1)"); - if (!firstLocked && secondLocked && i.second.fTry) - onlyMaybeDeadlock = true; - firstLocked = true; - } - if (i.first == mismatch.second) { + if (i.first == mismatch.second) LogPrintf(" (2)"); - if (!secondLocked && firstLocked && i.second.fTry) - onlyMaybeDeadlock = true; - secondLocked = true; - } LogPrintf(" %s\n", i.second.ToString()); } - firstLocked = false; - secondLocked = false; LogPrintf("Current lock order is:\n"); BOOST_FOREACH (const PAIRTYPE(void*, CLockLocation) & i, s1) { - if (i.first == mismatch.first) { + if (i.first == mismatch.first) LogPrintf(" (1)"); - if (!firstLocked && secondLocked && i.second.fTry) - onlyMaybeDeadlock = true; - firstLocked = true; - } - if (i.first == mismatch.second) { + if (i.first == mismatch.second) LogPrintf(" (2)"); - if (!secondLocked && firstLocked && i.second.fTry) - onlyMaybeDeadlock = true; - secondLocked = true; - } LogPrintf(" %s\n", i.second.ToString()); } - assert(onlyMaybeDeadlock); } static void push_lock(void* c, const CLockLocation& locklocation, bool fTry) @@ -132,8 +101,10 @@ static void push_lock(void* c, const CLockLocation& locklocation, bool fTry) lockorders[p1] = (*lockstack); std::pair<void*, void*> p2 = std::make_pair(c, i.first); - if (lockorders.count(p2)) + if (lockorders.count(p2)) { potential_deadlock_detected(p1, lockorders[p2], lockorders[p1]); + break; + } } } dd_mutex.unlock(); @@ -148,7 +119,7 @@ static void pop_lock() void EnterCritical(const char* pszName, const char* pszFile, int nLine, void* cs, bool fTry) { - push_lock(cs, CLockLocation(pszName, pszFile, nLine, fTry), fTry); + push_lock(cs, CLockLocation(pszName, pszFile, nLine), fTry); } void LeaveCritical() |