Bug 142701

Summary: Cross power spectrum causes continuous asserts in KstRWLock
Product: [Applications] kst Reporter: Andrew Walker <arwalker>
Component: generalAssignee: kst
Status: RESOLVED FIXED    
Severity: normal    
Priority: NOR    
Version First Reported In: 1.x   
Target Milestone: ---   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Fixes asserts in plugin

Description Andrew Walker 2007-03-08 20:54:22 UTC 
Version:           HEAD (using KDE KDE 3.5.1)
OS:                Linux

PROBLEM:

Cross power spectrum causes continuous asserts in KstRWLock

STEPS TO REPRODUCE:

Start Kst
Use the data wizard to plot 1 and 2 from gyrodata.dat against INDEX
Select Data... New Plugin...
Select the Cross Power Spectrum option in the Data Plugins dialog
Select reasonable values for the defaults in the New dialog
Select Vector One as 1
Select Vector Two as 2
Hit Ok
Add the resultant vector to a curve

RESULTS:

ASSERT: "myLockStatus() == KstRWLock::WRITELOCKED" in kstprimitive.cpp (41)
ASSERT: "myLockStatus() == KstRWLock::WRITELOCKED" in kstprimitive.cpp (41)
ASSERT: "myLockStatus() == KstRWLock::WRITELOCKED" in kstrvector.cpp (440)
ASSERT: "myLockStatus() == KstRWLock::WRITELOCKED" in kstrvector.cpp (440)
ASSERT: "myLockStatus() == KstRWLock::WRITELOCKED" in kstscalar.cpp (101)
ASSERT: "myLockStatus() == KstRWLock::WRITELOCKED" in kstscalar.cpp (101)

EXPECTED RESULTS:

There should be no asserts.
Comment 1 Andrew Walker 2007-03-08 21:32:24 UTC 
This may also be an issue with other plugins.

It is possible the deadlock is related to the time spent processing the plugin.
Comment 2 Adam Treat 2007-04-03 19:57:39 UTC 
Created attachment 20163 [details]
Fixes asserts in plugin
Comment 3 George Staikos 2007-04-03 20:08:43 UTC 
Looks good.

--
George Staikos
KDE Developer				http://www.kde.org/
Staikos Computing Services Inc.		http://www.staikos.net/
Comment 4 Adam Treat 2007-04-03 20:19:17 UTC 
SVN commit 650060 by treat:

* No more asserts

BUG:142701* No more asserts

BUG:142701* No more asserts

BUG:142701* No more asserts

BUG:142701* No more asserts

BUG:142701* No more asserts

BUG:142701* No more asserts

BUG:142701* No more asserts

BUG:142701


 M  +6 -0      crosspowerspectrum.cpp  
 M  +1 -16     crossspectrumdialog_i.cpp  


--- trunk/extragear/graphics/kst/src/plugins/crossspectrum/crosspowerspectrum.cpp #650059:650060
@@ -235,6 +235,8 @@
 
 
 KstObject::UpdateType CrossPowerSpectrum::update(int updateCounter) {
+  Q_ASSERT(myLockStatus() == KstRWLock::WRITELOCKED);
+
   bool force = dirty();
   setDirty(false);
 
@@ -248,6 +250,8 @@
 
   bool depUpdated = force;
 
+  writeLockInputsAndOutputs();
+
   depUpdated = UPDATE == v1()->update(updateCounter) || depUpdated;
   depUpdated = UPDATE == v2()->update(updateCounter) || depUpdated;
 
@@ -271,6 +275,8 @@
   frequency()->setNewAndShift(frequency()->length(), frequency()->numShift());
   frequency()->update(updateCounter);
 
+  unlockInputsAndOutputs();
+
   return setLastUpdateResult(depUpdated ? UPDATE : NO_CHANGE);
 }
 
--- trunk/extragear/graphics/kst/src/plugins/crossspectrum/crossspectrumdialog_i.cpp #650059:650060
@@ -91,15 +91,13 @@
   CrossPowerSpectrumPtr cps = kst_cast<CrossPowerSpectrum>(KstDataObject::createPlugin("Cross Power Spectrum"));
   Q_ASSERT(cps); //should never happen...
 
-  cps->writeLock();
+  KstWriteLocker pl(cps);
 
   if (tagName == defaultTag) {
     tagName = KST::suggestPluginName("crosspowerspectrum");
   }
   cps->setTagName(KstObjectTag::fromString(tagName));
 
-  cps->unlock();
-
   // Save the vectors and scalars
   if (!editSingleObject(cps) || !cps->isValid()) {
     KMessageBox::sorry(this, i18n("There is an error in the values you entered."));
@@ -144,19 +142,6 @@
 
   cps->setTagName(KstObjectTag::fromString(_tagName->text()));
 
-#if 0
-  // Must unlock before clear()
-  for (KstVectorMap::Iterator i = cps->inputVectors().begin(); i != cps->inputVectors().end(); ++i) {
-    (*i)->unlock();
-  }
-  for (KstScalarMap::Iterator i = cps->inputScalars().begin(); i != cps->inputScalars().end(); ++i) {
-    (*i)->unlock();
-  }
-  for (KstStringMap::Iterator i = cps->inputStrings().begin(); i != cps->inputStrings().end(); ++i) {
-    (*i)->unlock();
-  }
-#endif
-
   cps->inputVectors().clear();
   cps->inputScalars().clear();
   cps->inputStrings().clear();