remote debugging Graal, and similar use cases

[Garcia Gutierrez Miguel Alfredo]

After trying out different ways to debug a running Graal instance, two of them worked out of the box (summarized below) but a third didn't.

First what worked:

  (1) Ideal Graph Visualizer, which shows snapshots of choice indicated via Debug.dump

  (2) remote debug connection (e.g. from an IDE where breakpoints are set) to a running Graal vm, for example started with

      ./mx.sh unittest <your-unit-test-of-choice> @-Xdebug @-Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=y

      (Instead of unittest, one can launch a Java app of choice, the above is frequent use-case).

      Looks like for the above to work one should import beforehand the .launch file created by "mx build" (I don't remember if the remote launch option is available before importing it).

      The .launch file is imported into Eclipse via File > Import > Run/Debug > Launch configuration
      After importing it, launch first the listener via the command-line above, then from Eclipse Run > Debug > Attach remote Java app

(3) A third approach didn't work, comments as to why are welcome:

  (3.a) First, I created an Eclipse debug configuration for a Java application.
  (3.b) For that debug configuration, I specified an "Alternate JRE" as follows:

      ~/graal/jdk1.7.0_21/product/

  (3.c) added graal.jar (located in jre/lib of the product Graal JVM above)

However, the native methods needed by Graal aren't available. For example:

  java.lang.UnsatisfiedLinkError: com.oracle.graal.api.runtime.Graal.initializeRuntime()Lcom/oracle/graal/api/runtime/GraalRuntime;

Is this approach supposed to work, and if so what am I missing? (I realize that option (2) above already covers the same use-cases that one could exercise via (3), but still puzzled as to what's missing).


Miguel
http://magarciaepfl.github.io/scala/


--
Miguel Garcia
Swiss Federal Institute of Technology
EPFL - IC - LAMP1 - INR 328 - Station 14
CH-1015 Lausanne - Switzerland
http://lamp.epfl.ch/~magarcia/