I am trying to instrument a jar file (main.jar) with javaagent.jar using BCEL. basically where ever I find any aload in bytecode, I m trying to insert a function call to a static function called Fun() in class "someclass" using
// this code is in BCEL same can be written using javaassist
if (opcode instanceof aload) { iFactory.createInvoke("someclass", "fun", Type.VOID, new Type[]{}, Constants.INVOKESTATIC);
my "someclass" class reside in javaagent.jar
on executing
java -javaagent:javaagent.jar -jar main.jar
or
java -javaagent:javaagent.jar -jar main.jar javaagent.jar
or (I created a separate jar for my "someclass" called someclasscontained.jar)
java -javaagent:javaagent.jar -cp "someclasscontained.jar;main.jar "
I am getting
Exception in thread "main" java.lang.NoClassDefFoundError: someclass
error. i tried with -bootclasspath/p option but still not working. does anyone has any clue?
(1) all jar resides in same folder 2) used fully qualified class name 3) checked silly mistakes
