arch, base, cpu, gpu, mem: Replace assert(0 or false with panic.

Neither assert(0) nor assert(false) give any hint as to why control
getting to them is bad, and their more descriptive versions,
assert(0 && "description") and assert(false && "description"), jury
rig assert to add an error message when the utility function panic()
already does that directly with better formatting options.

This change replaces that flavor of call to assert with panic, except
in the actual code which processes the formatting that panic uses (to
avoid infinitely recurring error handling), and in some *.sm files
since I don't know what rules those have to follow and don't want to
accidentaly break them.

Change-Id: I8addfbfaf77eaed94ec8191f2ae4efb477cefdd0
Reviewed-on: https://gem5-review.googlesource.com/c/14636
Reviewed-by: Brandon Potter <Brandon.Potter@amd.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

2 files changed, 11 insertions, 12 deletions

diff --git a/src/cpu/minor/buffers.hh b/src/cpu/minor/buffers.hh
index 864b29e0c..edf87dec5 100644
--- a/src/cpu/minor/buffers.hh
+++ b/src/cpu/minor/buffers.hh
@@ -118,7 +118,11 @@ class NoBubbleTraits
 {
   public:
     static bool isBubble(const ElemType &) { return false; }
-    static ElemType bubble() { assert(false); }
+    static ElemType
+    bubble()
+    {
+        panic("bubble called but no bubble interface");
+    }
 };
 
 /** Pass on call to the element */
diff --git a/src/cpu/minor/lsq.cc b/src/cpu/minor/lsq.cc
index ad103b001..b836ed22d 100644
--- a/src/cpu/minor/lsq.cc
+++ b/src/cpu/minor/lsq.cc
@@ -44,6 +44,7 @@
 
 #include "arch/locked_mem.hh"
 #include "arch/mmapped_ipr.hh"
+#include "base/logging.hh"
 #include "cpu/minor/cpu.hh"
 #include "cpu/minor/exec_context.hh"
 #include "cpu/minor/execute.hh"
@@ -1121,8 +1122,7 @@ LSQ::tryToSend(LSQRequestPtr request)
                 request->setState(LSQRequest::StoreBufferIssuing);
                 break;
               default:
-                assert(false);
-                break;
+                panic("Unrecognized LSQ request state %d.", request->state);
             }
 
             state = MemoryRunning;
@@ -1144,8 +1144,7 @@ LSQ::tryToSend(LSQRequestPtr request)
                 request->setState(LSQRequest::StoreBufferNeedsRetry);
                 break;
               default:
-                assert(false);
-                break;
+                panic("Unrecognized LSQ request state %d.", request->state);
             }
         }
     }
@@ -1226,10 +1225,7 @@ LSQ::recvTimingResp(PacketPtr response)
         }
         break;
       default:
-        /* Shouldn't be allowed to receive a response from another
-         *  state */
-        assert(false);
-        break;
+        panic("Shouldn't be allowed to receive a response from another state");
     }
 
     /* We go to idle even if there are more things in the requests queue
@@ -1260,7 +1256,7 @@ LSQ::recvReqRetry()
         retryRequest->setState(LSQRequest::StoreInStoreBuffer);
         break;
       default:
-        assert(false);
+        panic("Unrecognized retry request state %d.", retryRequest->state);
     }
 
     /* Set state back to MemoryRunning so that the following
@@ -1283,8 +1279,7 @@ LSQ::recvReqRetry()
             storeBuffer.countIssuedStore(retryRequest);
             break;
           default:
-            assert(false);
-            break;
+            panic("Unrecognized retry request state %d.", retryRequest->state);
         }
 
         retryRequest = NULL;