PERFORCE change 97441 for review

[John Birrell]

http://perforce.freebsd.org/chv.cgi?CH=97441

Change 97441 by jb at jb_freebsd2 on 2006/05/19 02:23:02

	Add a SDT probe to DTrace's ioctl() to prove that it can be done. It's
	also kind of useful to be able to watch what DTrace actually does
	while it runs the tests.

Affected files ...

.. //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace.c#23 edit
.. //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_ioctl.c#13 edit

Differences ...

==== //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace.c#23 (text+ko) ====

@@ -63,6 +63,7 @@
 #include <sys/mutex.h>
 #include <sys/poll.h>
 #include <sys/proc.h>
+#include <sys/sdt.h>
 #include <sys/selinfo.h>
 #include <sys/smp.h>
 #include <sys/sysctl.h>

==== //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_ioctl.c#13 (text+ko) ====

@@ -32,6 +32,8 @@
 	if (state == NULL)
 		return (EINVAL);
 
+	SDT_PROBE(dtrace, ioctl, entry, cmd, addr, 0, 0, 0);
+
 	switch (cmd) {
 	case DTRACEIOC_AGGDESC: {
 		dtrace_aggdesc_t **paggdesc = (dtrace_aggdesc_t **) addr;