Changeset 5d9430d7 in mainline

Timestamp:

2008-12-07T13:39:54Z (16 years ago)

Author:

Jiri Svoboda <jirik.svoboda@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8af9950

Parents:

20eb5e4d

Message:

Fix panic caused by NULL pointer dereference.

File:

• kernel/generic/src/time/clock.c (modified) (1 diff)

kernel/generic/src/time/clock.c

@@ -190 +190 @@
                 
                 if (!ticks && !PREEMPTION_DISABLED) {
+#ifdef CONFIG_UDEBUG
+                        istate_t *istate;
+#endif
                         scheduler();
 #ifdef CONFIG_UDEBUG
                         /*
                          * Give udebug chance to stop the thread
-                         * before it begins executing.
+                         * before it begins executing userspace code.
                          */
-                        if (istate_from_uspace(THREAD->udebug.uspace_state))
+                        istate = THREAD->udebug.uspace_state;
+                        if (istate && istate_from_uspace(istate))
                                 udebug_before_thread_runs();
 #endif