Can not find systemtap-tapset.tar.gz/hotspot stp files in OpenJDK9 (original) (raw)

Mahesh Pujari pujarimahesh_kumar at yahoo.com
Mon Jun 8 10:37:58 UTC 2015

Missed to give the changes which I had to do manually on my local machine (very very minor). please see listing which contain links from which we can have tapsets and below steps were done from listing [2]

  1. Place all files in a directy by removing ".in" extension i.e. from hotspot.stp.in to hotspot.stp
  2. Remove hotspot_gc.stp.in file, as it seems the probes gc_collect_* don't exists in OpenJdk9.
  3. Replace @ABS_CLIENT_LIBJVM_SO@ and @ABS_SERVER_LIBJVM_SO@ in all the files with JAVA_HOME/lib/amd64/client/libjvm.so and JAVA_HOME/lib/amd64/server/libjvm.so (give complete path)
  4. In file hotspot-*.stp, find the probe object__alloc (in hotspot.object_alloc) and replace $HeapWordSize with 8 if we have 64 bit or else replace with 4 if its 32 bit.

Example to run a sample with HelloWorld program as below

stap -I /opt/jdk1.9.localbuild/tapset -e 'probe hotspot.object_alloc {log(probestr)}' -c '/opt/jdk1.9.localbuild/bin/java -XX:+ExtendedDTraceProbes HelloWorld'

Note: In above example "/opt/jdk1.9.localbuild/tapset" is the location where all stp files are placed and /opt/jdk1.9.localbuild/bin/java is the build of OpenJDK9 with dtrace enabled.

[1] http://icedtea.classpath.org/hg/icedtea7/file/tip/tapset [2] http://pkgs.fedoraproject.org/repo/pkgs/java-1.8.0-openjdk/systemtap-tapset.tar.gz/94ca5a45c3cb3b85c4577d0891166007/systemtap-tapset.tar.gz

On Monday, June 8, 2015 11:39 AM, Mahesh Pujari <pujarimahesh_kumar at yahoo.com> wrote:

Thanks Omair Majid and David Holmes. With few minor adjustments I was able use the hotspot tapset from IcedTea repository.

thanks and regards, Mahesh Pujari

On Friday, June 5, 2015 8:35 PM, Omair Majid <omajid at redhat.com> wrote:

I am building OpenJDK9 with dtrace enabled (on Ubuntu, its using systemtap, reference to mail list [1]). Can someone point me to where I can find systemtap-tapset.tar.gz, seems like this is needed, as this contains hotspot provider (files like tapset/hotspot-1.9.0.stp.in).

The various systemtap files are hosted in the IcedTea repositories. The latest version I know of is in IcedTea7: http://icedtea.classpath.org/hg/icedtea7/file/tip/tapset

For Fedora, we rename the files to add the OpenJDK version and put it in a single tarball: systemtap-tapset.tar.gz. They should be unchanged otherwise.

Thanks, Omair

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