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Code Issues Wiki Activity

Bug 118809: Failure to evaluate stack frame.

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This commit is contained in:
Mikhail Khodjaiants 2005-12-08 23:05:20 +00:00
parent 32d8ac98ea
commit fff6cffa2d
2 changed files with 53 additions and 27 deletions
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4
debug/org.eclipse.cdt.debug.core/ChangeLog
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@ -1,3 +1,7 @@
2005-12-08 Mikhail Khodjaiants
Bug 118809: Failure to evaluate stack frame.
* CThread.java
2005-11-28 Mikhail Khodjaiants
Bug 118272: Invalid stack trace when stepping out of function.
* CThread.java

76
debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/model/CThread.java
View file

@ -143,7 +143,7 @@ public class CThread extends CDebugElement implements ICThread, IRestart, IResum
fStackFrames = new ArrayList();
}
else if ( refreshChildren ) {
// If the last frame is dummy remove it
// Remove dummy frame
if ( fStackFrames.size() > 0 ) {
Object frame = fStackFrames.get( fStackFrames.size() - 1 );
if ( frame instanceof IDummyStackFrame ) {
@ -153,39 +153,40 @@ public class CThread extends CDebugElement implements ICThread, IRestart, IResum
// Retrieve stack frames from the backend
int depth = getStackDepth();
ICDIStackFrame[] frames = ( depth != 0 ) ? getCDIStackFrames( 0, ( depth >= getMaxStackDepth() ) ? getMaxStackDepth() - 1 : depth ) : new ICDIStackFrame[0];
if ( fStackFrames.isEmpty() ) {
if ( frames.length > 0 ) {
addStackFrames( frames, 0, frames.length, false );
}
}
else if ( depth < getLastStackDepth() ) {
// stepping out of the last frame
disposeStackFrames( 0, getLastStackDepth() - depth );
if ( frames.length > 0 ) {
updateStackFrames( frames, 0, fStackFrames, fStackFrames.size() );
if ( fStackFrames.size() < frames.length ) {
addStackFrames( frames, fStackFrames.size(), frames.length - fStackFrames.size(), true );
else {
int diff = depth - getLastStackDepth();
int offset = ( diff > 0 ) ? frames.length - diff : 0;
int length = ( diff > 0 ) ? diff : -diff;
if ( !compareStackFrames( frames, fStackFrames, offset, length ) ) {
// replace all frames
disposeStackFrames( 0, fStackFrames.size() );
addStackFrames( frames, 0, frames.length, false );
}
if ( diff < 0 ) {
// stepping out of the last frame
disposeStackFrames( 0, getLastStackDepth() - depth );
if ( frames.length > 0 ) {
updateStackFrames( frames, 0, fStackFrames, fStackFrames.size() );
if ( fStackFrames.size() < frames.length ) {
addStackFrames( frames, fStackFrames.size(), frames.length - fStackFrames.size(), true );
}
}
}
}
else if ( depth > getLastStackDepth() ) {
// stepping into a new frame
disposeStackFrames( frames.length - depth + getLastStackDepth(), depth - getLastStackDepth() );
addStackFrames( frames, 0, depth - getLastStackDepth(), false );
updateStackFrames( frames, depth - getLastStackDepth(), fStackFrames, frames.length - depth + getLastStackDepth() );
}
else { // depth == getLastStackDepth()
if ( depth != 0 ) {
// same number of frames - if top frames are in different
// function, replace all frames
ICDIStackFrame newTopFrame = (frames.length > 0) ? frames[0] : null;
ICDIStackFrame oldTopFrame = (fStackFrames.size() > 0) ? ((CStackFrame)fStackFrames.get( 0 )).getLastCDIStackFrame() : null;
if ( !CStackFrame.equalFrame( newTopFrame, oldTopFrame ) ) {
disposeStackFrames( 0, fStackFrames.size() );
addStackFrames( frames, 0, frames.length, false );
}
else // we are in the same frame
{
else if ( diff > 0 ) {
// stepping into a new frame
disposeStackFrames( frames.length - depth + getLastStackDepth(), depth - getLastStackDepth() );
addStackFrames( frames, 0, depth - getLastStackDepth(), false );
updateStackFrames( frames, depth - getLastStackDepth(), fStackFrames, frames.length - depth + getLastStackDepth() );
}
else { // diff == 0
if ( depth != 0 ) {
// we are in the same frame
updateStackFrames( frames, 0, fStackFrames, frames.length );
}
}
@ -199,6 +200,27 @@ public class CThread extends CDebugElement implements ICThread, IRestart, IResum
}
return fStackFrames;
}
/**
* Compares the lists of the old and new frames.
*
* @param newFrames the array of the new frames
* @param oldFrames the list of the old frames
* @param offset the offset in the new frames array
* @param length the number of frames to compare
*
* @return <code>true</code> if all frames are same
*/
private boolean compareStackFrames( ICDIStackFrame[] newFrames, List oldFrames, int offset, int length ) {
int index = offset;
Iterator it = oldFrames.iterator();
while( it.hasNext() && index < newFrames.length ) {
CStackFrame frame = (CStackFrame)it.next();
if ( !frame.getCDIStackFrame().equals( newFrames[index++] ) )
return false;
}
return true;
}
/**
* Retrieves and returns all underlying stack frames