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authorJustin Clark-Casey (justincc)2012-03-15 00:06:52 +0000
committerJustin Clark-Casey (justincc)2012-03-19 21:29:24 +0000
commit9ecbcb787c426aa0093355609651ead7eb14b4f1 (patch)
tree112e410d7576becae22cbc1bc38b85a8ffe9d27b /OpenSim/Region
parentrefactor: rename ScriptInstance.m_CurrentResult to m_CurrentWorkItem to make ... (diff)
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Alleviate an issue where calling Thread.Abort() on script WorkItems can fail to release locks, resulting in a crippled simulator.
This seems to be a particular problem with ReaderWriterLockSlim, though other locks can be affected as well. It has been seen to happen when llDie() is called in a linkset running more than one script. Alleviation here means supplying a ScriptInstance.Stop() timeout of 1000ms rather than 0ms, to give events a chance to complete. Also, we check the IsRunning status at the top of the ScriptInstance.EventProcessor() so that another event doesn't start in the mean time. Ultimately, a better solution may have to be found since a long-running event would still exceed the timeout and be aborted.
Diffstat (limited to 'OpenSim/Region')
-rw-r--r--OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs13
-rw-r--r--OpenSim/Region/ScriptEngine/XEngine/XEngine.cs6
2 files changed, 15 insertions, 4 deletions
diff --git a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
index b840730..6a9cd72 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
@@ -546,7 +546,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
546 public bool Stop(int timeout) 546 public bool Stop(int timeout)
547 { 547 {
548// m_log.DebugFormat( 548// m_log.DebugFormat(
549// "[SCRIPT INSTANCE]: Stopping script {0} {1} with timeout {2}", ScriptName, ItemID, timeout); 549// "[SCRIPT INSTANCE]: Stopping script {0} {1} in {2} {3} with timeout {4} {5} {6}",
550// ScriptName, ItemID, PrimName, ObjectID, timeout, m_InSelfDelete, DateTime.Now.Ticks);
550 551
551 IScriptWorkItem workItem; 552 IScriptWorkItem workItem;
552 553
@@ -575,7 +576,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
575 } 576 }
576 577
577 // Wait for the current event to complete. 578 // Wait for the current event to complete.
578 if (workItem.Wait(new TimeSpan((long)timeout * 100000))) 579 if (!m_InSelfDelete && workItem.Wait(new TimeSpan((long)timeout * 100000)))
579 { 580 {
580 return true; 581 return true;
581 } 582 }
@@ -592,7 +593,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
592 // forcibly abort the work item (this aborts the underlying thread). 593 // forcibly abort the work item (this aborts the underlying thread).
593 if (!m_InSelfDelete) 594 if (!m_InSelfDelete)
594 { 595 {
595// m_log.ErrorFormat("[SCRIPT INSTANCE]: Aborting script {0} {1}", ScriptName, ItemID); 596// m_log.ErrorFormat(
597// "[SCRIPT INSTANCE]: Aborting script {0} {1} in prim {2} {3} {4} {5}",
598// ScriptName, ItemID, PrimName, ObjectID, m_InSelfDelete, DateTime.Now.Ticks);
596 599
597 workItem.Abort(); 600 workItem.Abort();
598 } 601 }
@@ -706,6 +709,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
706 /// <returns></returns> 709 /// <returns></returns>
707 public object EventProcessor() 710 public object EventProcessor()
708 { 711 {
712 // We check here as the thread stopping this instance from running may itself hold the m_Script lock.
713 if (!Running)
714 return 0;
715
709 lock (m_Script) 716 lock (m_Script)
710 { 717 {
711// m_log.DebugFormat("[XEngine]: EventProcessor() invoked for {0}.{1}", PrimName, ScriptName); 718// m_log.DebugFormat("[XEngine]: EventProcessor() invoked for {0}.{1}", PrimName, ScriptName);
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index 1a9131e..5095037 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -1118,7 +1118,11 @@ namespace OpenSim.Region.ScriptEngine.XEngine
1118 } 1118 }
1119 1119
1120 instance.ClearQueue(); 1120 instance.ClearQueue();
1121 instance.Stop(0); 1121
1122 // Give the script some time to finish processing its last event. Simply aborting the script thread can
1123 // cause issues on mono 2.6, 2.10 and possibly later where locks are not released properly on abort.
1124 instance.Stop(1000);
1125
1122// bool objectRemoved = false; 1126// bool objectRemoved = false;
1123 1127
1124 lock (m_PrimObjects) 1128 lock (m_PrimObjects)