[NETBEANS-2028] 45s: single step in debugger may take so long......

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 10.0
• Component/s: debugger - Java
• Assignee: Martin Entlicher
• Reporter: Jaroslav Tulach
• Created: 30/Jan/19 16:50
• Updated: 30/Jan/19 16:53

Description

I have problems with debugger when I debug NetBeans based applications. Sometimes it just takes sooooo loooong to make a single step over. After some analysis it turned out that the whole slowdown is caused by evaluation of variables. When I modify the code to:

diff --git a/java/debugger.jpda/src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java b/java/debugger.jpda/src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java
index 0444242..933065c 100644
--- a/java/debugger.jpda/src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java
+++ b/java/debugger.jpda/src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java
@@ -345,7 +347,7 @@ public class JPDADebuggerImpl extends JPDADebugger {
      */
     public Variable evaluate (String expression, CallStackFrame csf, ObjectVariable var)
     throws InvalidExpressionException {
-        return evaluateGeneric(new EvaluatorExpression(expression), csf, var);
+        throw new InvalidExpressionException("skipping: " + expression);
     }

then the debugger starts to behave normally - it it can step in, over and out without any issues.

 

The next question is what is happening in the evaluateGeneric that takes so long?