What's jnativetracer?

jnativetracer is JVMTI agent to check callstack(s) to native (JNI) call.
You can get all callstacks which include native call.

How to use

Build

$ make JAVA_HOME=/path/to/jdk

Check callstacks

Pass -agentpath:/path/to/libjnativetracer.so to java.

Options

• dumpstack=true
  • Dump stack traces in each native calls.
• trigger=<class>::<field>
  • Set trigger field. Field should be boolean type. If this field set to true, jnativetracer starts tracing all native calls, and this field set to false, jnativetracer stops tracing.
• global=false
  • Show native call info in trigger thread only.
  • This option affects when trigger is set.

Example

$ cd example
$ javac SystemGC.java
$ java -agentpath:/path/to/libjnativetracer.so=global=false,dumpstack=true,trigger=SystemGC::isTrace SystemGC

License

The GNU Lesser General Public License, version 3.0