----- Original Message ----- > Hello all! > > I'm working with a GSoC student adding dtrace probe support to JRuby, > and ran into the issue that user-defined dtrace probes only work on > Solaris. So I started poking around hotspot source and found that both > the linux and bsd JSDT sources are empty and return false for > isSupported. Only solaris has JSDT support. >
Linux doesn't use DTrace. It uses SystemTap. CCing Mark Wielaard who added this support: http://hg.openjdk.java.net/jdk7u/jdk7u/hotspot/rev/c707a5af0d71 > (The student is developing on Solaris, but I am on OS X.) > > Obviously my next step was to simply copy the solaris source into the > BSD location and enable dtrace in the build. It didn't compile, but > there were only a handful of errors. > > So at this point I'm wondering a few things: > > * Is there any good reason why BSD (and Linux) support for JSDT has > not been ported or implemented? > * What is the current thought on the future of DTrace support in OpenJDK? > > Our steps going forward, if we want to support JRuby dtrace probes on > platforms other than Solaris, will be to either implement or coerce > someone into implementing BSD/Linux DTrace JSDT support in OpenJDK or > to use a third-party library and our own JNI bindings. I'd prefer to > just get it working in OpenJDK proper. > > Thoughts? > > - Charlie > > P.S. The files in question are > hotspot/src/os/bsd/vm/dtraceJSDT_bsd.cpp, > hotspot/src/os/linux/vm/dtraceJSDT_linux.cpp, and > hotspot/src/os/solaris/vm/dtraceJSDT_solaris.cpp. > -- Andrew :) Free Java Software Engineer Red Hat, Inc. (http://www.redhat.com) PGP Key: 248BDC07 (https://keys.indymedia.org/) Fingerprint = EC5A 1F5E C0AD 1D15 8F1F 8F91 3B96 A578 248B DC07
