- Add support for saving stack traces and displaying them via printf(9)

   and KTR.

Contributed by:		Antoine Brodin <antoine.brodin@laposte.net>
Concept code from:	Neal Fachan <neal@isilon.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/sys/sys/stack.h b/sys/sys/stack.h
new file mode 100644
index 0000000..768c275
--- /dev/null
+++ b/sys/sys/stack.h
@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2005 Antoine Brodin
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_STACK_H_
+#define	_SYS_STACK_H_
+
+#define	STACK_MAX	18	/* Don't change, stack_ktr relies on this. */
+
+struct sbuf;
+
+struct stack {
+	int		depth;
+	vm_offset_t	pcs[STACK_MAX];
+};
+
+/* MI Routines. */
+struct stack	*stack_create(void);
+void		 stack_destroy(struct stack *);
+int		 stack_put(struct stack *, vm_offset_t);
+void		 stack_copy(struct stack *, struct stack *);
+void		 stack_zero(struct stack *);
+void		 stack_print(struct stack *);
+void		 stack_sbuf_print(struct sbuf *, struct stack *);
+#ifdef KTR
+void		 stack_ktr(u_int, const char *, int, struct stack *, int);
+#define	CTRSTACK(m, st, cheap) do {					\
+	if (KTR_COMPILE & (m))						\
+		stack_ktr((m), __FILE__, __LINE__, st, cheap);		\
+	} while(0)
+#else
+#define	CTRSTACK(m, st, cheap)
+#endif
+
+/* MD Routine. */
+void		 stack_save(struct stack *);
+
+#endif