tracing: add virtual destructors for all events

trace/events.h

@@ -9,6 +9,8 @@ class event {
     {
     }
 
+    virtual ~event() { }
+
     virtual void dump(std::ostream &out) = 0;
 };
 
@@ -21,6 +23,8 @@ class EHostCall : public event {
     {
     }
 
+    virtual ~EHostCall() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.CALL " << fun << std::endl;
@@ -36,6 +40,8 @@ class EHostMsiX : public event {
     {
     }
 
+    virtual ~EHostMsiX() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.MSIX " << vec << std::endl;
@@ -53,6 +59,8 @@ class EHostDmaR : public event {
     {
     }
 
+    virtual ~EHostDmaR() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.DMAR id=" << id << " addr=" << addr << " size=" <<
@@ -71,6 +79,8 @@ class EHostDmaW : public event {
     {
     }
 
+    virtual ~EHostDmaW() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.DMAW id=" << id << " addr=" << addr << " size=" <<
@@ -83,9 +93,12 @@ class EHostDmaC : public event {
     uint64_t id;
 
     EHostDmaC(uint64_t ts_, uint64_t id_)
-        : event(ts_), id(id_)    {
+        : event(ts_), id(id_)
+    {
     }
 
+    virtual ~EHostDmaC() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.DMAC id=" << id << std::endl;
@@ -103,6 +116,8 @@ class EHostMmioR : public event {
     {
     }
 
+    virtual ~EHostMmioR() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.MMIOR id=" << id << " addr=" << addr << " size=" <<
@@ -121,6 +136,8 @@ class EHostMmioW : public event {
     {
     }
 
+    virtual ~EHostMmioW() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.MMIOW id=" << id << " addr=" << addr << " size=" <<
@@ -133,9 +150,12 @@ class EHostMmioC : public event {
     uint64_t id;
 
     EHostMmioC(uint64_t ts_, uint64_t id_)
-        : event(ts_), id(id_)    {
+        : event(ts_), id(id_)
+    {
     }
 
+    virtual ~EHostMmioC() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": H.MMIOC id=" << id << std::endl;
@@ -151,6 +171,8 @@ class e_nic_msix : public event {
     {
     }
 
+    virtual ~e_nic_msix() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": N.MSIX " << vec << std::endl;
@@ -168,6 +190,8 @@ class e_nic_dma_i : public event {
     {
     }
 
+    virtual ~e_nic_dma_i() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": N.DMAI id=" << id << " addr=" << addr << " size=" <<
@@ -183,6 +207,8 @@ class e_nic_dma_c : public event {
         : event(ts_), id(id_)    {
     }
 
+    virtual ~e_nic_dma_c() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": N.DMAC id=" << id << std::endl;
@@ -200,6 +226,8 @@ class e_nic_mmio_r : public event {
     {
     }
 
+    virtual ~e_nic_mmio_r() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": N.MMIOR addr=" << addr << " size=" << size << " val=" <<
@@ -218,6 +246,8 @@ class e_nic_mmio_w : public event {
     {
     }
 
+    virtual ~e_nic_mmio_w() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": N.MMIOW addr=" << addr << " size=" << size << " val=" <<
@@ -234,6 +264,8 @@ class e_nic_tx : public event {
     {
     }
 
+    virtual ~e_nic_tx() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": N.TX " << len << std::endl;
@@ -249,6 +281,8 @@ class e_nic_rx : public event {
     {
     }
 
+    virtual ~e_nic_rx() { }
+
     virtual void dump(std::ostream &out)
     {
         out << ts << ": N.RX " << len << std::endl;