Fix: Address a few benign memory leaks

This patch is the result of static analysis identifying a number of
memory leaks. The leaks are all benign as they are a result of not
deallocating memory in the desctructor. The fix still has value as it
removes false positives in the static analysis.

src/cpu/activity.cc

@@ -46,6 +46,11 @@ ActivityRecorder::ActivityRecorder(const string &name, int num_stages,
     std::memset(stageActive, 0, numStages);
 }
 
+ActivityRecorder::~ActivityRecorder()
+{
+    delete[] stageActive;
+}
+
 void
 ActivityRecorder::activity()
 {

src/cpu/activity.hh

@@ -54,6 +54,7 @@ class ActivityRecorder
   public:
     ActivityRecorder(const std::string &name, int num_stages,
                      int longest_latency, int count);
+    ~ActivityRecorder();
 
     /** Records that there is activity this cycle. */
     void activity();

src/cpu/base.cc

@@ -243,6 +243,9 @@ BaseCPU::enableFunctionTrace()
 
 BaseCPU::~BaseCPU()
 {
+    delete profileEvent;
+    delete[] comLoadEventQueue;
+    delete[] comInstEventQueue;
 }
 
 void

src/cpu/o3/regfile.hh

@@ -75,6 +75,11 @@ class PhysRegFile
     PhysRegFile(O3CPU *_cpu, unsigned _numPhysicalIntRegs,
                 unsigned _numPhysicalFloatRegs);
 
+    /**
+     * Destructor to free resources
+     */
+    ~PhysRegFile();
+
     //Everything below should be pretty well identical to the normal
     //register file that exists within AlphaISA class.
     //The duplication is unfortunate but it's better than having
@@ -197,4 +202,11 @@ PhysRegFile<Impl>::PhysRegFile(O3CPU *_cpu, unsigned _numPhysicalIntRegs,
     memset(floatRegFile, 0, sizeof(PhysFloatReg) * numPhysicalFloatRegs);
 }
 
+template <class Impl>
+PhysRegFile<Impl>::~PhysRegFile()
+{
+    delete intRegFile;
+    delete floatRegFile;
+}
+
 #endif