GitHub - jgf/bytecode_counter: An jvm agent library that counts the number of executed java bytecode instructions during a program run.

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An jvm agent library that counts the number of executed java bytecode instructions during a program run.

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Name		Name	Last commit message	Last commit date
Latest commit History 22 Commits
.gitignore		.gitignore
Makefile		Makefile
README		README
README.hashmap		README.hashmap
Test.java		Test.java
count_instructions.c		count_instructions.c
hashmap.c		hashmap.c
hashmap.h		hashmap.h

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ATTENTION: Eventually adjust Makefile to your environment. It may work for OSX
and ubuntu linux without adjustments.

This project contains a jvm agent library that can be used to count the number
of java bytecode instructions that are executed during a certain program run.
It displays the results on a per method basis. This has been used to check
the impact of compiletime optimizations to the bytecode in the context of a
compiler course at the Karlstuhe Institute of Technology.

Be aware that running a jvm with this agent library attached results in a
heavy slowdown, due to massive callbacks and a disabled jit compiler.

- make
    Builds jvm agent library for the instruction counter 'libcounter.(jnilib|so)'.
- make test
    Build classes needed for a testrun.
- make run-test
    Runs the testcase java program and counts the executed instructions.
- make clean
    Cleans up intermediate compilation results.
- make clean-all
    Cleans up all generated files.

This program is written by Juergen Graf <[email protected]>.