/*******************************************************************************
- * Copyright (c) 2012 Ericsson
+ * Copyright (c) 2012, 2013 Ericsson
* Copyright (c) 2010, 2011 École Polytechnique de Montréal
* Copyright (c) 2010, 2011 Alexandre Montplaisir <alexandre.montplaisir@gmail.com>
*
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
+import java.util.concurrent.CountDownLatch;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
-import org.eclipse.linuxtools.internal.tmf.core.Tracer;
+import org.eclipse.linuxtools.internal.tmf.core.Activator;
+import org.eclipse.linuxtools.internal.tmf.core.statesystem.backends.IStateHistoryBackend;
import org.eclipse.linuxtools.tmf.core.exceptions.AttributeNotFoundException;
+import org.eclipse.linuxtools.tmf.core.exceptions.StateSystemDisposedException;
import org.eclipse.linuxtools.tmf.core.exceptions.StateValueTypeException;
import org.eclipse.linuxtools.tmf.core.exceptions.TimeRangeException;
import org.eclipse.linuxtools.tmf.core.interval.ITmfStateInterval;
import org.eclipse.linuxtools.tmf.core.interval.TmfStateInterval;
-import org.eclipse.linuxtools.tmf.core.statesystem.IStateSystemBuilder;
+import org.eclipse.linuxtools.tmf.core.statesystem.ITmfStateSystemBuilder;
import org.eclipse.linuxtools.tmf.core.statevalue.ITmfStateValue;
import org.eclipse.linuxtools.tmf.core.statevalue.TmfStateValue;
* @author alexmont
*
*/
-public class StateSystem implements IStateSystemBuilder {
+public class StateSystem implements ITmfStateSystemBuilder {
/* References to the inner structures */
private final AttributeTree attributeTree;
private final TransientState transState;
private final IStateHistoryBackend backend;
+ /* Latch tracking if the state history is done building or not */
+ private final CountDownLatch finishedLatch = new CountDownLatch(1);
+
+ private boolean buildCancelled = false;
+ private boolean isDisposed = false;
+
+ /**
+ * New-file constructor. For when you build a state system with a new file,
+ * or if the back-end does not require a file on disk.
+ *
+ * @param backend
+ * Back-end plugin to use
+ */
+ public StateSystem(IStateHistoryBackend backend) {
+ this.backend = backend;
+ this.transState = new TransientState(backend);
+ this.attributeTree = new AttributeTree(this);
+ }
+
/**
* General constructor
*
* @param backend
- * The "state history storage" backend to use.
+ * The "state history storage" back-end to use.
* @param newFile
* Put true if this is a new history started from scratch. It is
* used to tell the state system where to get its attribute tree.
/* We're opening an existing file */
this.attributeTree = new AttributeTree(this, backend.supplyAttributeTreeReader());
transState.setInactive();
+ finishedLatch.countDown(); /* The history is already built */
+ }
+ }
+
+ @Override
+ public boolean waitUntilBuilt() {
+ try {
+ finishedLatch.await();
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ }
+ return !buildCancelled;
+ }
+
+ @Override
+ public synchronized void dispose() {
+ isDisposed = true;
+ if (transState.isActive()) {
+ transState.setInactive();
+ buildCancelled = true;
}
+ backend.dispose();
}
//--------------------------------------------------------------------------
*/
attributeTree.writeSelf(attributeTreeFile, attributeTreeFilePos);
}
+ finishedLatch.countDown(); /* Mark the history as finished building */
}
//--------------------------------------------------------------------------
}
stackDepth++;
- subAttributeQuark = getQuarkRelativeAndAdd(attributeQuark,
- stackDepth.toString());
+ subAttributeQuark = getQuarkRelativeAndAdd(attributeQuark, stackDepth.toString());
- modifyAttribute(t, TmfStateValue.newValueInt(stackDepth),
- attributeQuark);
+ modifyAttribute(t, TmfStateValue.newValueInt(stackDepth), attributeQuark);
modifyAttribute(t, value, subAttributeQuark);
}
@Override
- public void popAttribute(long t, int attributeQuark)
+ public ITmfStateValue popAttribute(long t, int attributeQuark)
throws AttributeNotFoundException, TimeRangeException,
StateValueTypeException {
- Integer stackDepth;
- int subAttributeQuark;
- ITmfStateValue previousSV = transState.getOngoingStateValue(attributeQuark);
+ /* These are the state values of the stack-attribute itself */
+ ITmfStateValue previousSV = queryOngoingState(attributeQuark);
if (previousSV.isNull()) {
- /* Same as if stackDepth == 0, see below */
- return;
+ /*
+ * Trying to pop an empty stack. This often happens at the start of
+ * traces, for example when we see a syscall_exit, without having
+ * the corresponding syscall_entry in the trace. Just ignore
+ * silently.
+ */
+ return null;
}
- if (previousSV.getType() != 0) {
+ if (previousSV.getType() != ITmfStateValue.TYPE_INTEGER) {
/*
* The existing value was a string, this doesn't look like a valid
* stack attribute.
throw new StateValueTypeException();
}
- stackDepth = previousSV.unboxInt();
-
- if (stackDepth == 0) {
- /*
- * Trying to pop an empty stack. This often happens at the start of
- * traces, for example when we see a syscall_exit, without having
- * the corresponding syscall_entry in the trace. Just ignore
- * silently.
- */
- return;
- }
+ Integer stackDepth = previousSV.unboxInt();
- if (stackDepth < 0) {
+ if (stackDepth <= 0) {
/* This on the other hand should not happen... */
- String message = "A top-level stack attribute " + //$NON-NLS-1$
- "cannot have a negative integer value."; //$NON-NLS-1$
+ /* the case where == -1 was handled previously by .isNull() */
+ String message = "A top-level stack attribute cannot " + //$NON-NLS-1$
+ "have a value of 0 or less (except -1/null)."; //$NON-NLS-1$
throw new StateValueTypeException(message);
}
- /* The attribute should already exist... */
- subAttributeQuark = getQuarkRelative(attributeQuark,
- stackDepth.toString());
+ /* The attribute should already exist at this point */
+ int subAttributeQuark = getQuarkRelative(attributeQuark, stackDepth.toString());
+ ITmfStateValue poppedValue = queryOngoingState(subAttributeQuark);
- stackDepth--;
- modifyAttribute(t, TmfStateValue.newValueInt(stackDepth),
- attributeQuark);
+ /* Update the state value of the stack-attribute */
+ ITmfStateValue nextSV;
+ if (--stackDepth == 0 ) {
+ /* Jump over "0" and store -1 (a null state value) */
+ nextSV = TmfStateValue.nullValue();
+ } else {
+ nextSV = TmfStateValue.newValueInt(stackDepth);
+ }
+ modifyAttribute(t, nextSV, attributeQuark);
+
+ /* Delete the sub-attribute that contained the user's state value */
removeAttribute(t, subAttributeQuark);
+
+ return poppedValue;
}
@Override
return transState.getOngoingStateValue(attributeQuark);
}
+ @Override
+ public long getOngoingStartTime(int attribute)
+ throws AttributeNotFoundException {
+ return transState.getOngoingStartTime(attribute);
+ }
+
@Override
public void updateOngoingState(ITmfStateValue newValue, int attributeQuark)
throws AttributeNotFoundException {
transState.changeOngoingStateValue(attributeQuark, newValue);
}
-
-
//--------------------------------------------------------------------------
// Regular query methods (sent to the back-end)
//--------------------------------------------------------------------------
@Override
public synchronized List<ITmfStateInterval> queryFullState(long t)
- throws TimeRangeException {
+ throws TimeRangeException, StateSystemDisposedException {
+ if (isDisposed) {
+ throw new StateSystemDisposedException();
+ }
+
List<ITmfStateInterval> stateInfo = new ArrayList<ITmfStateInterval>(
attributeTree.getNbAttributes());
@Override
public ITmfStateInterval querySingleState(long t, int attributeQuark)
- throws AttributeNotFoundException, TimeRangeException {
- ITmfStateInterval ret;
+ throws AttributeNotFoundException, TimeRangeException,
+ StateSystemDisposedException {
+ if (isDisposed) {
+ throw new StateSystemDisposedException();
+ }
+ ITmfStateInterval ret;
if (transState.hasInfoAboutStateOf(t, attributeQuark)) {
ret = transState.getOngoingInterval(attributeQuark);
} else {
return ret;
}
+ @Override
+ public ITmfStateInterval querySingleStackTop(long t, int stackAttributeQuark)
+ throws StateValueTypeException, AttributeNotFoundException,
+ TimeRangeException, StateSystemDisposedException {
+ Integer curStackDepth = querySingleState(t, stackAttributeQuark).getStateValue().unboxInt();
+
+ if (curStackDepth == -1) {
+ /* There is nothing stored in this stack at this moment */
+ return null;
+ } else if (curStackDepth < -1 || curStackDepth == 0) {
+ /*
+ * This attribute is an integer attribute, but it doesn't seem like
+ * it's used as a stack-attribute...
+ */
+ throw new StateValueTypeException();
+ }
+
+ int subAttribQuark = getQuarkRelative(stackAttributeQuark, curStackDepth.toString());
+ ITmfStateInterval ret = querySingleState(t, subAttribQuark);
+ return ret;
+ }
+
@Override
public List<ITmfStateInterval> queryHistoryRange(int attributeQuark,
long t1, long t2) throws TimeRangeException,
- AttributeNotFoundException {
+ AttributeNotFoundException, StateSystemDisposedException {
+ if (isDisposed) {
+ throw new StateSystemDisposedException();
+ }
+
List<ITmfStateInterval> intervals;
ITmfStateInterval currentInterval;
long ts, tEnd;
@Override
public List<ITmfStateInterval> queryHistoryRange(int attributeQuark,
long t1, long t2, long resolution, IProgressMonitor monitor)
- throws TimeRangeException, AttributeNotFoundException {
+ throws TimeRangeException, AttributeNotFoundException,
+ StateSystemDisposedException {
+ if (isDisposed) {
+ throw new StateSystemDisposedException();
+ }
+
List<ITmfStateInterval> intervals;
ITmfStateInterval currentInterval;
long ts, tEnd;
- if (monitor == null) {
- monitor = new NullProgressMonitor();
+ IProgressMonitor mon = monitor;
+ if (mon == null) {
+ mon = new NullProgressMonitor();
}
/* Make sure the time range makes sense */
*/
for (ts = t1; (currentInterval.getEndTime() != -1) && (ts < tEnd);
ts += resolution) {
- if (monitor.isCanceled()) {
+ if (mon.isCanceled()) {
return intervals;
}
if (ts <= currentInterval.getEndTime()) {
//--------------------------------------------------------------------------
static void logMissingInterval(int attribute, long timestamp) {
- Tracer.traceInfo("No data found in history for attribute " + //$NON-NLS-1$
+ Activator.logInfo("No data found in history for attribute " + //$NON-NLS-1$
attribute + " at time " + timestamp + //$NON-NLS-1$
", returning dummy interval"); //$NON-NLS-1$
}
projects / deliverable / tracecompass.git / blobdiff