From: Ali Saidi <saidi@eecs.umich.edu>
Date: Tue, 15 Mar 2005 22:31:18 +0000 (-0500)
Subject: during a cache miss in the simple cpu we were  finalizing the trace
X-Git-Tag: m5_1.0_tutorial~69^2~5^2~7^2
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=caf16a99cc70bd9cf4078a7e08d208984a116951;p=gem5.git

during a cache miss in the simple cpu we were  finalizing the trace
data too early (before the cache miss completed) and therefore
writing freeded memory after the cache miss completed.

Also removed some spurious setAddr() and setData() calls.

--HG--
extra : convert_revision : 3da82540c69c4c417aba3ed155e167d09431a1b2
---

diff --git a/cpu/simple_cpu/simple_cpu.cc b/cpu/simple_cpu/simple_cpu.cc
index 86aeab7d7..6a95a52c2 100644
--- a/cpu/simple_cpu/simple_cpu.cc
+++ b/cpu/simple_cpu/simple_cpu.cc
@@ -393,13 +393,11 @@ template <class T>
 Fault
 SimpleCPU::read(Addr addr, T &data, unsigned flags)
 {
-    if (status() == DcacheMissStall) {
+    if (status() == DcacheMissStall || status() == DcacheMissSwitch) {
         Fault fault = xc->read(memReq,data);
 
         if (traceData) {
             traceData->setAddr(addr);
-            if (fault == No_Fault)
-                traceData->setData(data);
         }
         return fault;
     }
@@ -428,21 +426,11 @@ SimpleCPU::read(Addr addr, T &data, unsigned flags)
             // do functional access
             fault = xc->read(memReq, data);
 
-            if (traceData) {
-                traceData->setAddr(addr);
-                if (fault == No_Fault)
-                    traceData->setData(data);
-            }
         }
     } else if(fault == No_Fault) {
         // do functional access
         fault = xc->read(memReq, data);
 
-        if (traceData) {
-            traceData->setAddr(addr);
-            if (fault == No_Fault)
-                traceData->setData(data);
-        }
     }
 
     if (!dcacheInterface && (memReq->flags & UNCACHEABLE))
@@ -498,11 +486,6 @@ template <class T>
 Fault
 SimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
 {
-    if (traceData) {
-        traceData->setAddr(addr);
-        traceData->setData(data);
-    }
-
     memReq->reset(addr, sizeof(T), flags);
 
     // translate to physical address
@@ -605,6 +588,8 @@ SimpleCPU::processCacheCompletion()
       case DcacheMissStall:
         if (memReq->cmd.isRead()) {
             curStaticInst->execute(this,traceData);
+            if (traceData)
+                traceData->finalize();
         }
         dcacheStallCycles += curTick - lastDcacheStall;
         _status = Running;
@@ -613,6 +598,8 @@ SimpleCPU::processCacheCompletion()
       case DcacheMissSwitch:
         if (memReq->cmd.isRead()) {
             curStaticInst->execute(this,traceData);
+            if (traceData)
+                traceData->finalize();
         }
         _status = SwitchedOut;
         sampler->signalSwitched();
@@ -785,8 +772,12 @@ SimpleCPU::tick()
             comLoadEventQueue[0]->serviceEvents(numLoad);
         }
 
-        if (traceData)
+        // If we have a dcache miss, then we can't finialize the instruction
+        // trace yet because we want to populate it with the data later
+        if (traceData &&
+                !(status() == DcacheMissStall && memReq->cmd.isRead())) {
             traceData->finalize();
+        }
 
         traceFunctions(xc->regs.pc);