Relocate bodies of DTrace probes to the statically-linked VM.

Due to various operating systems (in both the DTrace and SystemTap
worlds) not fully supporting DTrace probes (or SystemTap-compatibility
mode probes) in shared libraries, we relocate those probes to the
statically-linked virtual machine.  This could be seen as pollution
of the pristine VM by a (yet) experimental feature.  However:

1. This code can be eliminated completely by the C preprocessor.
2. Leaving the probes in the dyntrace NIF shared library simply
   does not work correctly on too many platforms.

*Many* thanks to Macneil Shonle at Basho for assisting when my
RSI-injured fingers gave out.

Tested on:

* CentOS 5, SystemTap 1.3
* Solaris 10 (note)
* Solaris 11
* OpenIndiana 151
* SmartOS 20120809T221258Z
* FreeBSD 9.0-RELEASE (note)

I had hoped to be able to test CentOS 6 + SystemTap 1.7, but the
details of dealing with all dependencies for a 2.6.32-279.5.1.el6.x86_64
kernel are too time consuming right now.

(note: Solaris 10 and FreeBSD 9.0-RELEASE can take a long time to compile)

1 files changed, 9 insertions, 0 deletions

diff --git a/erts/emulator/beam/erl_nif.h b/erts/emulator/beam/erl_nif.h
index e5d99dc4f1..33e221b44c 100644
--- a/erts/emulator/beam/erl_nif.h
+++ b/erts/emulator/beam/erl_nif.h
@@ -226,6 +226,15 @@ ERL_NIF_INIT_DECL(NAME)			\
 }                                       \
 ERL_NIF_INIT_EPILOGUE
 
+#if defined(USE_DYNAMIC_TRACE) && (defined(USE_DTRACE) || defined(USE_SYSTEMTAP))
+#define HAVE_USE_DTRACE 1
+#endif
+
+#ifdef HAVE_USE_DTRACE
+ERL_NIF_TERM erl_nif_user_trace_s1(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+ERL_NIF_TERM erl_nif_user_trace_i4s4(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+ERL_NIF_TERM erl_nif_user_trace_n(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+#endif
 
 #endif /* __ERL_NIF_H__ */