Hi, My name is Asaf Yaffe and I am a committer on the Eclipse Test and Performance Tool Platform (TPTP) Java Profiler project. We are currently working on updating our Binary Code Instrumentation (BCI) engine to support the new Java 6 class file format (version 50.0) and the new StackMapTable attribute. When the BCI engine modifies the byte-codes of a method, it must recompute the StackMapTable attribute to successfully pass the Java 6 verifier. The current implementation of Java 6 gracefully “falls-back” to the old verification scheme (which does not depend on the StackMapTable attribute) in face of a missing/invalid StackMapTable attribute. This may not be the case in future Java versions, and tool writers are encouraged to update their BCI-based tools (see here for more information: https://jdk.dev.java.net/verifier.html).
Instead of developing StackMapTable calculation for the BCI engine, we would like to explore the option of reusing code from the Harmony byte-code verifier to recompute the StackMapTable of a method from its byte-codes. Ideally, we would like to have a stand-alone library (provided in source or binary form – exact distribution model should be discussed) which exports two APIs: - IsStackMapTableAttributeValid(): given the method byte-codes and StackMapTable, checks whether the StackMapTable is valid. - RecomputeStackMapTableAttribute(): given the method byte-codes, produces a new valid StackMapTable that can be used by the Java 6 verifier of any Java 6-compliant JVM. With best regards, Asaf Yaffe Eclipse TPTP Committer, JVMTI Profiler component. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
