dbDbLink: debug detect dbPutLink w/o locking

Cross-check ownership when lockset debug tracking is enabled.

modules/database/src/ioc/db/dbDbLink.c

@@ -443,6 +443,17 @@ static long processTarget(dbCommon *psrc, dbCommon *pdst)
     epicsUInt8 pact = psrc->pact;
     epicsThreadId self = epicsThreadGetIdSelf();
 
+#ifdef LOCKSET_DEBUG
+    {
+        lockSet *ls = dbLockGetRef(psrc->lset);
+        assert(ls->owner == self);
+        dbLockDecRef(ls);
+        ls = dbLockGetRef(pdst->lset);
+        assert(ls->owner == self);
+        dbLockDecRef(ls);
+    }
+#endif
+
     psrc->pact = TRUE;
 
     if (psrc->ppn)

modules/database/src/ioc/db/dbLockPvt.h

@@ -12,6 +12,7 @@
 #include "dbLock.h"
 #include "epicsMutex.h"
 #include "epicsSpin.h"
+#include "epicsThread.h"
 
 /* Define to enable additional error checking */
 #undef LOCKSET_DEBUG