From 5ecaf30219d8a846f2747d4d67503c21c6e13333 Mon Sep 17 00:00:00 2001
From: Ali Saidi <Ali.Saidi@ARM.com>
Date: Thu, 10 May 2012 18:04:27 -0500
Subject: gem5: fix a number of use after free issues

---
 src/cpu/checker/cpu.cc | 3 ++-
 src/sim/eventq.hh      | 6 +++---
 2 files changed, 5 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/cpu/checker/cpu.cc b/src/cpu/checker/cpu.cc
index 901c3900f..73205dc35 100644
--- a/src/cpu/checker/cpu.cc
+++ b/src/cpu/checker/cpu.cc
@@ -264,13 +264,14 @@ CheckerCPU::writeMem(uint8_t *data, unsigned size,
          * enabled.  This is left as future work for the Checker: LSQ snooping
          * and memory validation after stores have committed.
          */
+        bool was_prefetch = memReq->isPrefetch();
 
         delete memReq;
 
         //If we don't need to access a second cache line, stop now.
         if (fault != NoFault || secondAddr <= addr)
         {
-            if (fault != NoFault && memReq->isPrefetch()) {
+            if (fault != NoFault && was_prefetch) {
               fault = NoFault;
             }
             break;
diff --git a/src/sim/eventq.hh b/src/sim/eventq.hh
index c859823c8..e7d088e80 100644
--- a/src/sim/eventq.hh
+++ b/src/sim/eventq.hh
@@ -516,11 +516,11 @@ EventQueue::deschedule(Event *event)
     event->flags.clear(Event::Squashed);
     event->flags.clear(Event::Scheduled);
 
-    if (event->flags.isSet(Event::AutoDelete))
-        delete event;
-
     if (DTRACE(Event))
         event->trace("descheduled");
+
+    if (event->flags.isSet(Event::AutoDelete))
+        delete event;
 }
 
 inline void
-- 
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