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From: Marius Strobl <marius@FreeBSD.org>
Date: Sun, 29 Sep 2013 13:09:25 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r255937 - head/sys/sparc64/include
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Author: marius
Date: Sun Sep 29 13:09:25 2013
New Revision: 255937
URL: http://svnweb.freebsd.org/changeset/base/255937

Log:
  Implement GET_STACK_USAGE.
  Discussed with:	mav
  
  Approved by:	re (kib)
  MFC after:	1 week

Modified:
  head/sys/sparc64/include/proc.h

Modified: head/sys/sparc64/include/proc.h
==============================================================================
--- head/sys/sparc64/include/proc.h	Sun Sep 29 13:05:22 2013	(r255936)
+++ head/sys/sparc64/include/proc.h	Sun Sep 29 13:09:25 2013	(r255937)
@@ -55,6 +55,17 @@ struct mdproc {
 
 #ifdef _KERNEL
 
+#include <machine/pcb.h>
+
+/* Get the current kernel thread stack usage. */
+#define	GET_STACK_USAGE(total, used) do {				\
+	struct thread *td = curthread;					\
+	(total) = td->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb);	\
+	(used) = (char *)td->td_kstack +				\
+	    td->td_kstack_pages * PAGE_SIZE -				\
+	    (char *)&td;						\
+} while (0)
+
 struct syscall_args {
 	u_int code;
 	struct sysent *callp;