From b13ae86ed0df158d2d4fed826ced5472bf104543 Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Sat, 13 Sep 2014 01:27:46 +0200
Subject: [PATCH 2/3] ddb: add db_check_task_address_valid

* ddb/db_task_thread.c (db_check_task_address_valid): New function.
* ddb/db_task_thread.h (db_check_task_address_valid): New declaration.
---
 ddb/db_task_thread.c | 14 ++++++++++++++
 ddb/db_task_thread.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/ddb/db_task_thread.c b/ddb/db_task_thread.c
index edab17e..97c81c8 100644
--- a/ddb/db_task_thread.c
+++ b/ddb/db_task_thread.c
@@ -135,6 +135,20 @@ db_lookup_thread(target_thread)
 }
 
 /*
+ * check the address is a valid task address
+ */
+boolean_t
+db_check_task_address_valid(const task_t task)
+{
+	if (db_lookup_task(task) < 0) {
+	    db_printf("Bad task address 0x%x\n", task);
+	    db_flush_lex();
+	    return(FALSE);
+	} else
+	    return(TRUE);
+}
+
+/*
  * check the address is a valid thread address
  */
 boolean_t
diff --git a/ddb/db_task_thread.h b/ddb/db_task_thread.h
index cbb3680..18f1957 100644
--- a/ddb/db_task_thread.h
+++ b/ddb/db_task_thread.h
@@ -46,6 +46,7 @@ extern thread_t	db_default_thread;		/* default target thread */
 extern int		db_lookup_task(const task_t);
 extern int		db_lookup_thread(const thread_t);
 extern int		db_lookup_task_thread(const task_t, const thread_t);
+extern boolean_t	db_check_task_address_valid(const task_t);
 extern boolean_t	db_check_thread_address_valid(const thread_t);
 extern boolean_t	db_get_next_thread(thread_t *, int);
 extern void		db_init_default_thread(void);
-- 
2.1.0