PERFORCE change 61698 for review

[John Baldwin]

http://perforce.freebsd.org/chv.cgi?CH=61698

Change 61698 by jhb at jhb_slimer on 2004/09/17 15:00:11

	Add a stracktrace test.

Affected files ...

.. //depot/projects/smpng/sys/modules/crash/crash.c#14 edit

Differences ...

==== //depot/projects/smpng/sys/modules/crash/crash.c#14 (text+ko) ====

@@ -54,7 +54,7 @@
 #include <sys/sysctl.h>
 #include <sys/systm.h>
 
-#define	MAX_EVENT	20
+#define	MAX_EVENT	21
 
 static struct sx foo, bar, bar2;
 static struct cv event_cv;
@@ -83,6 +83,7 @@
 	"try lock tests including recursion test",
 	"test witness_defineorder and witness_checkorder",
 	"blow the kernel stack on purpose",
+	"test deep stack backtraces",
 };
 
 static int	mod_event(struct module *module, int cmd, void *arg);
@@ -124,6 +125,17 @@
 }
 
 static void
+recurse_deep(int depth)
+{
+
+	if (depth == 20) {
+		kdb_backtrace();
+		kdb_enter(__func__);
+	} else
+		recurse_deep(depth + 1);
+}
+
+static void
 crash_thread(void *arg)
 {
 	int ev, status;
@@ -306,6 +318,9 @@
 		case 20:
 			(void)blow_stack();
 			break;
+		case 21:
+			recurse_deep(0);
+			break;
 		default:
 			panic("event %d is bogus\n", event);
 		}