[PATCH 0 of 3] Add support for dtrace compatible sdt probes on GNU/Linux

[Daniel D. Daugherty]

Adding serviceability-dev at openjdk.java.net to this e-mail thread.

On 5/10/12 7:49 AM, Mark Wielaard wrote:
> Hi,
>
> The following three patches enable support for dtrace compatible sdt probes
> on GNU/Linux. Most of the support was already submitted earlier. These are
> just the last three things left in IcedTea that actually enable it in
> hotspot. It has been in production use for some time already.
>
> The patches could be applied all as one, or individually if you want to be
> able to test them independently.
>
> The first patch is just a consistency cleanup patch. The JNI Set and
> SetStatic Field methods used HS_DTRACE_PROBE_CDECL_N and HS_DTRACE_PROBE_N
> directly instead of just using DTRACE_PROBE[N] like all other JNI methods.
> This doesn't matter for the Solaris macros, but on GNU/Linux the macros
> don't use direct function declarations (which is introduced in the second
> patch).
>
> The second patch introduces the DTRACE macros for use with the GNU/Linux
> SystemTap provided sys/sdt.h. Like Solaris this uses USDT1, but using
> macros instead of function declaractions. So it just adds a check for
> whether USDT1 is used with SOLARIS (HS_DTRACE_WORKAROUND_TAIL_CALL_BUG
> is only needed there) and defines HS_DTRACE_PROBE[N] for the LINUX case.
>
> The last patch enables the support in the build. I took the approach
> used in the make/solaris/dtrace.make and vm.make file with a test to
> see whether sys/sdt.h is available or not and printing a notice when
> they are not found. In IcedTea there is a more elaborate configure
> check to see if a small C++ program can be build with DTRACE probes
> in it, but that looked like overkill here.
>
> Patches in separate emails.
>
> Cheers,
>
> Mark
>
> The second patch adds the actual
>   src/share/vm/prims/jni.cpp        |  11 ++------
>   src/share/vm/utilities/dtrace.hpp |  50 ++++++++++++++++++++++++++++++++++++++-
>   make/linux/makefiles/dtrace.make  |  24 ++++++++++++++++++
>   make/linux/makefiles/vm.make      |   2 +-
>   4 files changed, 77 insertions(+), 10 deletions(-)