Name: kbR10066 Date: 03/17/2003


JCov agent when run with type=M option sometimes produces the following
warning:

*** JCOV WARNING : duplicated class has no timestamp (skipped): <class name>

and the class mentioned in the warning is not then present in the resulting coverage
file. At the same time this class is definitely loaded only once, so it is not duplicated.

To reproduce, follow these steps (note that such failure can be quite intermittent):

1. Compile b.java (source is below)
% <JDK1.4.0>/bin/javac b.java

2. Run class b under JCov:

% JDK1.4.0>/bin/java \
-Xmx9M \
-XX:-UseFastEmptyMethods -XX:-UseFastAccessorMethods \
-Xrunjcov:t=M \
-cp . \
b
You will then see many warnings such as described above.

--- b.java ---
public class b {
public static void main(String[] args) {
int HEAP_SIZE = 800000;

for (int i = 0; i < 2; i++) {
long[] arr = new long[HEAP_SIZE];
System.out.println(arr[HEAP_SIZE - 1]);
arr = null;
System.gc();
try {
Thread.currentThread().sleep(1000);
} catch (InterruptedException ie) {
System.out.println("INTERRUPTED");
}
}
}
}
--- end of b.java ---
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