sim: Call regStats of base-class as well

We want to extend the stats of objects hierarchically and thus it is necessary
to register the statistics of the base-class(es), as well.  For now, these are
empty, but generic stats will be added there.

Patch originally provided by Akash Bagdia at ARM Ltd.

src/arch/arm/table_walker.cc

@@ -2122,6 +2122,8 @@ TableWalker::pageSizeNtoStatBin(uint8_t N)
 void
 TableWalker::regStats()
 {
+    ClockedObject::regStats();
+
     statWalks
         .name(name() + ".walks")
         .desc("Table walker walks requested")

src/arch/arm/tlb.cc

@@ -417,6 +417,7 @@ TLB::unserialize(CheckpointIn &cp)
 void
 TLB::regStats()
 {
+    BaseTLB::regStats();
     instHits
         .name(name() + ".inst_hits")
         .desc("ITB inst hits")

src/cpu/base.cc

@@ -397,6 +397,8 @@ BaseCPU::probeInstCommit(const StaticInstPtr &inst)
 void
 BaseCPU::regStats()
 {
+    MemObject::regStats();
+
     using namespace Stats;
 
     numCycles

src/cpu/testers/traffic_gen/traffic_gen.cc

@@ -526,6 +526,8 @@ TrafficGen::noProgress()
 void
 TrafficGen::regStats()
 {
+    ClockedObject::regStats();
+
     // Initialise all the stats
     using namespace Stats;
 

src/dev/net/etherdevice.cc

@@ -36,6 +36,8 @@
 void
 EtherDevice::regStats()
 {
+    PciDevice::regStats();
+
     txBytes
         .name(name() + ".txBytes")
         .desc("Bytes Transmitted")

src/dev/pci/copy_engine.cc

@@ -425,6 +425,8 @@ CopyEngine::CopyEngineChannel::channelWrite(Packet *pkt, Addr daddr, int size)
 void
 CopyEngine::regStats()
 {
+    PciDevice::regStats();
+
     using namespace Stats;
     bytesCopied
         .init(regs.chanCount)

src/dev/storage/ide_disk.cc

@@ -392,6 +392,8 @@ IdeDisk::doDmaDataRead()
 void
 IdeDisk::regStats()
 {
+    SimObject::regStats();
+
     using namespace Stats;
     dmaReadFullPages
         .name(name() + ".dma_read_full_pages")

src/mem/abstract_mem.cc

@@ -79,6 +79,8 @@ AbstractMemory::setBackingStore(uint8_t* pmem_addr)
 void
 AbstractMemory::regStats()
 {
+    MemObject::regStats();
+
     using namespace Stats;
 
     assert(system());

src/mem/cache/base.cc

@@ -176,6 +176,8 @@ BaseCache::inRange(Addr addr) const
 void
 BaseCache::regStats()
 {
+    MemObject::regStats();
+
     using namespace Stats;
 
     // Hit statistics

src/mem/cache/prefetch/base.cc

@@ -74,6 +74,8 @@ BasePrefetcher::setCache(BaseCache *_cache)
 void
 BasePrefetcher::regStats()
 {
+    ClockedObject::regStats();
+
     pfIssued
         .name(name() + ".num_hwpf_issued")
         .desc("number of hwpf issued")

src/mem/cache/tags/base.cc

@@ -71,7 +71,10 @@ BaseTags::setCache(BaseCache *_cache)
 void
 BaseTags::regStats()
 {
+    ClockedObject::regStats();
+
     using namespace Stats;
+
     replacements
         .init(maxThreadsPerCPU)
         .name(name() + ".replacements")

src/mem/comm_monitor.cc

@@ -384,6 +384,8 @@ CommMonitor::recvRangeChange()
 void
 CommMonitor::regStats()
 {
+    MemObject::regStats();
+
     // Initialise all the monitor stats
     using namespace Stats;
 

src/mem/xbar.cc

@@ -541,6 +541,8 @@ BaseXBar::getAddrRanges() const
 void
 BaseXBar::regStats()
 {
+    ClockedObject::regStats();
+
     using namespace Stats;
 
     transDist

src/sim/process.cc

@@ -191,6 +191,8 @@ Process::Process(ProcessParams * params)
 void
 Process::regStats()
 {
+    SimObject::regStats();
+
     using namespace Stats;
 
     num_syscalls

src/sim/system.cc

@@ -393,6 +393,8 @@ System::unserialize(CheckpointIn &cp)
 void
 System::regStats()
 {
+    MemObject::regStats();
+
     for (uint32_t j = 0; j < numWorkIds ; j++) {
         workItemStats[j] = new Stats::Histogram();
         stringstream namestr;