java PrintCompilation output: what's the meaning of “made not entrant” and “made zombie”

Question

When running a Java 1.6 (1.6.0_03-b05) app I\'ve added the -XX:+PrintCompilation flag. On the output for some methods, in particular some of those that I know are g

Answer 1

A newer explanation is that there can be entries like this in log:

129   72       3       EscapeAnalysysTest::second (24 bytes)
.......... some more lines
135   76       4       EscapeAnalysysTest::second (24 bytes)
137   74       3       EscapeAnalysysTest::second (24 bytes)   made not entrant

This actually means that one method (second here) has been compiled under tier level 3, then under tier level 4 it has been further more optimized and it has been made not entrant for the 3-d tier; meaning it will be replaced with code from the 4-th tier.