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.
(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.
