instrumentation can cause class file size to go over 65535

Heavy instrumentation of class files that are already large (e.g. 
containing large arrays being initialized with constant String values) can 
cause the instrumented class file to exceed 65535 bytes.  The following 
exception occurs when this file is subsequently loaded for a dynamic 
analysis:

ERR> Exception in thread "main" java.lang.ClassFormatError: JVMCFRE042 
bytecode array size > 65535; 
class=org/apache/fop/text/linebreak/LineBreakUtils, offset=196356
ERR>    at java.lang.ClassLoader.defineClass(ClassLoader.java:265)
ERR>    at java.security.SecureClassLoader.defineClass(Unknown Source)
ERR>    at java.net.URLClassLoader.defineClass(URLClassLoader.java:493)
ERR>    at java.net.URLClassLoader.access$300(URLClassLoader.java:64)
ERR>    at java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java:892)
ERR>    at 
java.security.AccessController.doPrivileged(AccessController.java:284)
ERR>    at java.net.URLClassLoader.findClass(URLClassLoader.java:414)
ERR>    at java.lang.ClassLoader.loadClass(ClassLoader.java:643)
ERR>    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:300)
ERR>    at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
ERR>    at 
org.apache.fop.text.linebreak.LineBreakStatus.nextChar(LineBreakStatus.java
:76)

This is not a bug but it needs cleaner reporting.  Investigate if it is 
possible to catch this bug in chord.instr.Instrumentor while writing the 
instrumented class file to disk.  The easiest fix for this bug is to simply 
put the name of the class (org.apache.fop.text.linebreak.LineBreakUtils in 
the above example) in the value of system property chord.scope.exclude.ext 
to prevent it from being instrumented.

Original issue reported on code.google.com by mayur.naik on 14 Mar 2010 at 8:38

cvs77 / jchord

instrumentation can cause class file size to go over 65535 #7