JCallTracer is a tool to generate Sequence Diagrams for big and multi-threaded Java applications. Large Java application themselves use a lot of RAM, leaving little space for a JVMTI agent to maintain its own data-structures to trace the calls.

This tool works ( experimental at the moment ), by offloading much of the internal data-structures to disk using squential writes. Sequential writes are fast!

Parts of this project are based on the code from Java Call Tracer

How to build?

• Prerequisites:

  • JDK v5.0 +
  • GNU C++ compiler ( g++ )
  • GNU Make tool
  • Ruby 1.9
  • Ant - Java build tool

• Set the JDK_HOME environment variable:

  $ export JDK_HOME=/usr/lib/jvm/java-6-openjdk-amd46

• Now invoke Make

  $ make

• This is your agent: libjct.so

  $ java -agentpath:./libjct.so com.test.HelloWorld

• Checking out the tool

  Simply invoke the test script

  $ sh bin/test.sh

  OR

  $ javac test-src/com/test/HelloWorld.java $ java -agentpath:./libjct.so=filterList=com.test,traceFile=calltrace.log -cp test-src com.test.HelloWorld

  Loading agent: libjct

  Hello World!

  12 saleem

  Now view SVG files in Firefox

  $ firefox output/