Support for Serializable non-SimObject things like events.

Can now serialize & unserialize DmaRequestEvents and DmaTransferEvents.
Also support serialize/unserialize of pointers to SimObjects and
other Serializable objects.

arch/alpha/alpha_memory.cc:
arch/alpha/alpha_memory.hh:
arch/alpha/isa_traits.hh:
cpu/exec_context.cc:
cpu/exec_context.hh:
cpu/simple_cpu/simple_cpu.hh:
dev/alpha_access.h:
dev/alpha_console.cc:
dev/alpha_console.hh:
dev/console.cc:
dev/console.hh:
    unserialize() now takes a Checkpoint* instead of an IniFile*.
cpu/simple_cpu/simple_cpu.cc:
    unserialize() now takes a Checkpoint* instead of an IniFile*.
    Put ExecContext in its own section so its _status fields doesn't conflict.
sim/eventq.cc:
sim/eventq.hh:
    unserialize() now takes a Checkpoint* instead of an IniFile*.
    Events get serialized by the event queue only if they're marked
    as AutoSerialize... others are assumed to be serialized by something
    else (e.g. an owning SimObject) or to not matter.
sim/param.cc:
    Shift 'const' in case T is a ptr type.
sim/serialize.cc:
sim/serialize.hh:
    Define Checkpoint object to encapsulate everything you need to know
    about a checkpoint.  Use it to allow lookups of named Serializable
    objects (and SimObjects) during unserialization.
    unserialize() now takes a Checkpoint* instead of an IniFile*.

--HG--
extra : convert_revision : 8e6baab32405f8f548bb67a097b2f713296537a5

diff --git a/arch/alpha/alpha_memory.cc b/arch/alpha/alpha_memory.cc
index 7c0b1120fe87f2fccdf80342b2128ac6366645bf..c79b821d0b260438cb4319ec5d3b95380e412741 100644 (file)
--- a/arch/alpha/alpha_memory.cc
+++ b/arch/alpha/alpha_memory.cc
@@ -204,13 +204,13 @@ AlphaTlb::serialize(ostream &os)
 }
 
 void
-AlphaTlb::unserialize(const IniFile *db, const string &section)
+AlphaTlb::unserialize(Checkpoint *cp, const string &section)
 {
     UNSERIALIZE_SCALAR(size);
     UNSERIALIZE_SCALAR(nlu);
 
     for (int i = 0; i < size; i++) {
-        table[i].unserialize(db, csprintf("%s.PTE%d", section, i));
+        table[i].unserialize(cp, csprintf("%s.PTE%d", section, i));
         if (table[i].valid) {
             lookupTable.insert(make_pair(table[i].tag, i));
         }

diff --git a/arch/alpha/alpha_memory.hh b/arch/alpha/alpha_memory.hh
index fc4d46191406ab9aa9e85034bb48feadbcef3c18..bfcd313e20708e3d8bd44f7f298e7b2da04c7fe6 100644 (file)
--- a/arch/alpha/alpha_memory.hh
+++ b/arch/alpha/alpha_memory.hh
@@ -74,7 +74,7 @@ class AlphaTlb : public SimObject
 
     // Checkpointing
     virtual void serialize(std::ostream &os);
-    virtual void unserialize(const IniFile *db, const std::string &section);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
 };
 
 class AlphaItb : public AlphaTlb

diff --git a/arch/alpha/isa_traits.hh b/arch/alpha/isa_traits.hh
index fbdcffbcf1d2841e7b03eee8a53b5e4210ea73a0..406ffb6f3c95bb893a4d346c581836de914a08e7 100644 (file)
--- a/arch/alpha/isa_traits.hh
+++ b/arch/alpha/isa_traits.hh
@@ -34,7 +34,7 @@
 #include "base/misc.hh"
 
 class FullCPU;
-class IniFile;
+class Checkpoint;
 
 #define TARGET_ALPHA
 
@@ -160,7 +160,7 @@ class AlphaISA
         uint8_t opcode, ra;            // current instruction details (for intr's)
 
         void serialize(std::ostream &os);
-        void unserialize(const IniFile *db, const std::string &section);
+        void unserialize(Checkpoint *cp, const std::string &section);
     };
 
     static StaticInstPtr<AlphaISA> decodeInst(MachInst);

diff --git a/cpu/exec_context.cc b/cpu/exec_context.cc
index b869a8c4d8b898e3b6bdfd09c61c356b2761840c..195c9daad033b892e6fd1378a7c67d44796e9f32 100644 (file)
--- a/cpu/exec_context.cc
+++ b/cpu/exec_context.cc
@@ -108,10 +108,10 @@ ExecContext::serialize(ostream &os)
 
 
 void
-ExecContext::unserialize(const IniFile *db, const std::string &section)
+ExecContext::unserialize(Checkpoint *cp, const std::string &section)
 {
     UNSERIALIZE_ENUM(_status);
-    regs.unserialize(db, section);
+    regs.unserialize(cp, section);
     // thread_num and cpu_id are deterministic from the config
     UNSERIALIZE_SCALAR(func_exe_insn);
 }

diff --git a/cpu/exec_context.hh b/cpu/exec_context.hh
index 6938b369f1363ba48b0a36b7f13e19b51fcd33f2..cb826a15ec937a989f1a97aa9c80ceffdeb3c08f 100644 (file)
--- a/cpu/exec_context.hh
+++ b/cpu/exec_context.hh
@@ -142,7 +142,7 @@ class ExecContext
     void regStats(const std::string &name);
 
     void serialize(std::ostream &os);
-    void unserialize(const IniFile *db, const std::string &section);
+    void unserialize(Checkpoint *cp, const std::string &section);
 
 #ifdef FULL_SYSTEM
     bool validInstAddr(Addr addr) { return true; }

diff --git a/cpu/simple_cpu/simple_cpu.cc b/cpu/simple_cpu/simple_cpu.cc
index 3179b7b1f420c30a70b8dfc1b7bbaba3a22fd8bc..519a8cd4d8a1defecd9aae624eabc8c234a62f59 100644 (file)
--- a/cpu/simple_cpu/simple_cpu.cc
+++ b/cpu/simple_cpu/simple_cpu.cc
@@ -262,6 +262,7 @@ SimpleCPU::serialize(ostream &os)
 {
     SERIALIZE_ENUM(_status);
     SERIALIZE_SCALAR(inst);
+    nameOut(os, csprintf("%s.xc", name()));
     xc->serialize(os);
     nameOut(os, csprintf("%s.tickEvent", name()));
     tickEvent.serialize(os);
@@ -270,14 +271,14 @@ SimpleCPU::serialize(ostream &os)
 }
 
 void
-SimpleCPU::unserialize(const IniFile *db, const string &section)
+SimpleCPU::unserialize(Checkpoint *cp, const string &section)
 {
     UNSERIALIZE_ENUM(_status);
     UNSERIALIZE_SCALAR(inst);
-    xc->unserialize(db, section);
-    tickEvent.unserialize(db, csprintf("%s.tickEvent", name()));
+    xc->unserialize(cp, csprintf("%s.xc", section));
+    tickEvent.unserialize(cp, csprintf("%s.tickEvent", section));
     cacheCompletionEvent
-        .unserialize(db, csprintf("%s.cacheCompletionEvent", name()));
+        .unserialize(cp, csprintf("%s.cacheCompletionEvent", section));
 }
 
 void

diff --git a/cpu/simple_cpu/simple_cpu.hh b/cpu/simple_cpu/simple_cpu.hh
index 61831cb3c963aa40c848bdeb123939bbc409f6be..61c9143bab2889cbae6657d66b4e9a20b91e8cea 100644 (file)
--- a/cpu/simple_cpu/simple_cpu.hh
+++ b/cpu/simple_cpu/simple_cpu.hh
@@ -49,7 +49,7 @@ class GDBListener;
 #endif // FULL_SYSTEM
 
 class MemInterface;
-class IniFile;
+class Checkpoint;
 
 namespace Trace {
     class InstRecord;
@@ -259,7 +259,7 @@ class SimpleCPU : public BaseCPU
     void processCacheCompletion();
 
     virtual void serialize(std::ostream &os);
-    virtual void unserialize(const IniFile *db, const std::string &section);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
 
     template <class T>
     Fault read(Addr addr, T& data, unsigned flags);

diff --git a/dev/alpha_access.h b/dev/alpha_access.h
index c145fa2a3ea2fc3fcb42b09cbe645ba169557154..eb551a3599600799ae8cf9c41b3ec900377fd632 100644 (file)
--- a/dev/alpha_access.h
+++ b/dev/alpha_access.h
@@ -44,7 +44,7 @@ typedef uint64_t UINT64;
 
 #include <ostream>
 #include <string>
-class IniFile;
+class Checkpoint;
 
 #endif
 
@@ -82,7 +82,7 @@ struct AlphaAccess
 
 #ifndef CONSOLE
     void serialize(std::ostream &os);
-    void unserialize(const IniFile *db, const std::string &section);
+    void unserialize(Checkpoint *cp, const std::string &section);
 #endif
 };
 

diff --git a/dev/alpha_console.cc b/dev/alpha_console.cc
index 969b1e4c3097a2d05e19f1b68d7a2a723a08ab24..6fe57edb55eb677a765001fe16add7c534a88bd1 100644 (file)
--- a/dev/alpha_console.cc
+++ b/dev/alpha_console.cc
@@ -188,7 +188,7 @@ AlphaAccess::serialize(ostream &os)
 }
 
 void
-AlphaAccess::unserialize(const IniFile *db, const std::string &section)
+AlphaAccess::unserialize(Checkpoint *cp, const std::string &section)
 {
     UNSERIALIZE_SCALAR(last_offset);
     UNSERIALIZE_SCALAR(version);
@@ -216,9 +216,9 @@ AlphaConsole::serialize(ostream &os)
 }
 
 void
-AlphaConsole::unserialize(const IniFile *db, const std::string &section)
+AlphaConsole::unserialize(Checkpoint *cp, const std::string &section)
 {
-    alphaAccess->unserialize(db, section);
+    alphaAccess->unserialize(cp, section);
 }
 
 BEGIN_DECLARE_SIM_OBJECT_PARAMS(AlphaConsole)

diff --git a/dev/alpha_console.hh b/dev/alpha_console.hh
index e4aeb2417515e98c9cf66cc6e6c4828b2e438b7c..9e774773ee048bfb4059178b42e97b47b8c9c3db 100644 (file)
--- a/dev/alpha_console.hh
+++ b/dev/alpha_console.hh
@@ -101,7 +101,7 @@ class AlphaConsole : public MmapDevice
      * standard serialization routines for checkpointing
      */
     virtual void serialize(std::ostream &os);
-    virtual void unserialize(const IniFile *db, const std::string &section);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
 };
 
 #endif // __ALPHA_CONSOLE_HH__

diff --git a/dev/console.cc b/dev/console.cc
index 749add532086304c2a47bea2dfe71fe6f352f2ef..2378f8c7556753665b57e258247b37ee966ca7ea 100644 (file)
--- a/dev/console.cc
+++ b/dev/console.cc
@@ -319,7 +319,7 @@ SimConsole::serialize(ostream &os)
 }
 
 void
-SimConsole::unserialize(const IniFile *db, const std::string &section)
+SimConsole::unserialize(Checkpoint *cp, const std::string &section)
 {
 }
 

diff --git a/dev/console.hh b/dev/console.hh
index 6746f90b6643e04e9f2861299958a20ab17e9afc..fd02e7a9a852795be37a5986c33640569657485b 100644 (file)
--- a/dev/console.hh
+++ b/dev/console.hh
@@ -129,7 +129,7 @@ class SimConsole : public SimObject
     void setInt(int bits);
 
     virtual void serialize(std::ostream &os);
-    virtual void unserialize(const IniFile *db, const std::string &section);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
 };
 
 class ConsoleListener : public SimObject

diff --git a/sim/eventq.cc b/sim/eventq.cc
index 77eb490c74e0eff813b1c3bb9226a00af5cbb248..ef813eb13e6b99d6892b697c5050fdffd1864d66 100644 (file)
--- a/sim/eventq.cc
+++ b/sim/eventq.cc
@@ -129,7 +129,7 @@ Event::serialize(std::ostream &os)
 
 
 void
-Event::unserialize(const IniFile *db, const string &section)
+Event::unserialize(Checkpoint *cp, const string &section)
 {
     if (scheduled())
         deschedule();
@@ -154,39 +154,51 @@ Event::unserialize(const IniFile *db, const string &section)
 void
 EventQueue::nameChildren()
 {
-#if 0
-    int j = 0;
-
+    int numEvents = 0;
     Event *event = head;
     while (event) {
-        stringstream stream;
-        ccprintf(stream, "%s.event%d", name(), j++);
-        event->setName(stream.str());
-
+        if (event->getFlags(Event::AutoSerialize)) {
+            event->setName(csprintf("%s.event%d", name(), numEvents++));
+        }
         event = event->next;
     }
-#endif
+
+    numAutoSerializeEvents = numEvents;
 }
 
 void
 EventQueue::serialize(ostream &os)
 {
-#if 0
-    string objects = "";
+    // should have been set by a preceding call to nameChildren()
+    assert(numAutoSerializeEvents >= 0);
 
+    SERIALIZE_SCALAR(numAutoSerializeEvents);
+
+    int numEvents = 0;
     Event *event = head;
     while (event) {
-        objects += event->name();
-        objects += " ";
-        event->serialize(os);
-
+        if (event->getFlags(Event::AutoSerialize)) {
+            event->nameOut(os);
+            event->serialize(os);
+            numEvents++;
+        }
         event = event->next;
     }
-    nameOut(os, "Serialized");
-    SERIALIZE_SCALAR(objects);
-#endif
+
+    assert(numEvents == numAutoSerializeEvents);
+}
+
+
+void
+EventQueue::unserialize(Checkpoint *cp, const std::string &section)
+{
+    UNSERIALIZE_SCALAR(numAutoSerializeEvents);
+    for (int eventNum = 0; eventNum < numAutoSerializeEvents; ++eventNum) {
+        Serializeable::create(cp, csprintf("%s.event%d", section, eventNum));
+    }
 }
 
+
 void
 EventQueue::dump()
 {

diff --git a/sim/eventq.hh b/sim/eventq.hh
index a8eae12485724497be458a8d7659b130200bb1ad..11bfe3a4e0a3298f2f09bcd8e7bf796ac0e89a68 100644 (file)
--- a/sim/eventq.hh
+++ b/sim/eventq.hh
@@ -73,7 +73,8 @@ class Event : public Serializeable, public FastAlloc
         None = 0x0,
         Squashed = 0x1,
         Scheduled = 0x2,
-        AutoDelete = 0x4
+        AutoDelete = 0x4,
+        AutoSerialize = 0x8
     };
 
     bool getFlags(Flags f) const { return (_flags & f) == f; }
@@ -190,7 +191,7 @@ class Event : public Serializeable, public FastAlloc
     };
 
     virtual void serialize(std::ostream &os);
-    virtual void unserialize(const IniFile *db, const std::string &section);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
 };
 
 template <class T, void (T::* F)()>
@@ -221,6 +222,9 @@ class EventQueue : public Serializeable
   private:
     Event *head;
 
+    // only used to hold value between nameChildren() and serialize()
+    int numAutoSerializeEvents;
+
     void insert(Event *event);
     void remove(Event *event);
 
@@ -228,7 +232,7 @@ class EventQueue : public Serializeable
 
     // constructor
     EventQueue(const std::string &n)
-        : Serializeable(n), head(NULL)
+        : Serializeable(n), head(NULL), numAutoSerializeEvents(-1)
     {}
 
     // schedule the given event on this queue
@@ -264,6 +268,7 @@ class EventQueue : public Serializeable
 
     virtual void nameChildren();
     virtual void serialize(std::ostream &os);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
 };
 
 

diff --git a/sim/param.cc b/sim/param.cc
index 5f3f604c1f75c4e1fb986062ade55578e5208f40..7affe47862b379f9ad2d60cf15d446403ea021b5 100644 (file)
--- a/sim/param.cc
+++ b/sim/param.cc
@@ -97,7 +97,7 @@ parseParam(const string &s, T &value)
 
 template <class T>
 void
-showParam(ostream &os, const T &value)
+showParam(ostream &os, T const &value)
 {
     os << value;
 }
@@ -277,7 +277,7 @@ template VectorParam<type>;
 // types that can use the above templates
 #define INSTANTIATE_PARAM_TEMPLATES(type, typestr)                     \
 template bool parseParam<type>(const string &s, type &value);          \
-template void showParam<type>(ostream &os, const type &value);         \
+template void showParam<type>(ostream &os, type const &value);         \
 template void Param<type>::parse(const string &);                      \
 template void VectorParam<type>::parse(const string &);                        \
 template void Param<type>::showValue(ostream &) const;                 \

diff --git a/sim/serialize.cc b/sim/serialize.cc
index f838acc8d9c5a5487896a9604cedcbbe7984c9c3..dfd495a32af6b304b82aa523a5af28a6381c560b 100644 (file)
--- a/sim/serialize.cc
+++ b/sim/serialize.cc
@@ -43,6 +43,7 @@
 #include "sim/sim_events.hh"
 #include "sim/sim_object.hh"
 #include "base/trace.hh"
+#include "sim/config_node.hh"
 
 using namespace std;
 
@@ -88,11 +89,11 @@ paramOut(ostream &os, const std::string &name, const T& param)
 
 template <class T>
 void
-paramIn(const IniFile *db, const std::string &section,
+paramIn(Checkpoint *cp, const std::string &section,
         const std::string &name, T& param)
 {
     std::string str;
-    if (!db->find(section, name, str) || !parseParam(str, param)) {
+    if (!cp->find(section, name, str) || !parseParam(str, param)) {
         fatal("Can't unserialize '%s:%s'\n", section, name);
     }
 }
@@ -116,11 +117,11 @@ arrayParamOut(ostream &os, const std::string &name,
 
 template <class T>
 void
-arrayParamIn(const IniFile *db, const std::string &section,
+arrayParamIn(Checkpoint *cp, const std::string &section,
              const std::string &name, T *param, int size)
 {
     std::string str;
-    if (!db->find(section, name, str)) {
+    if (!cp->find(section, name, str)) {
         fatal("Can't unserialize '%s:%s'\n", section, name);
     }
 
@@ -159,17 +160,27 @@ arrayParamIn(const IniFile *db, const std::string &section,
 }
 
 
+void
+objParamIn(Checkpoint *cp, const std::string &section,
+           const std::string &name, Serializeable * &param)
+{
+    if (!cp->findObj(section, name, param)) {
+        fatal("Can't unserialize '%s:%s'\n", section, name);
+    }
+}
+
+
 #define INSTANTIATE_PARAM_TEMPLATES(type)                              \
 template void                                                          \
-paramOut(ostream &os, const std::string &name, const type &param);     \
+paramOut(ostream &os, const std::string &name, type const &param);     \
 template void                                                          \
-paramIn(const IniFile *db, const std::string &section,                 \
+paramIn(Checkpoint *cp, const std::string &section,                    \
         const std::string &name, type & param);                                \
 template void                                                          \
 arrayParamOut(ostream &os, const std::string &name,                    \
-              const type *param, int size);                            \
+              type const *param, int size);                            \
 template void                                                          \
-arrayParamIn(const IniFile *db, const std::string &section,            \
+arrayParamIn(Checkpoint *cp, const std::string &section,               \
              const std::string &name, type *param, int size);
 
 
@@ -421,41 +432,74 @@ SerializeableClass::SerializeableClass(const string &className,
 //
 //
 Serializeable *
-SerializeableClass::createObject(IniFile &configDB,
-                                 const string &configClassName)
+SerializeableClass::createObject(Checkpoint *cp,
+                                 const std::string &section)
 {
-    // find simulation object class name from configuration class
-    // (specified by 'type=' parameter)
-    string simObjClassName;
+    string className;
 
-    if (!configDB.findDefault(configClassName, "type", simObjClassName)) {
-        cerr << "Configuration class '" << configClassName << "' not found."
-             << endl;
-        abort();
+    if (!cp->find(section, "type", className)) {
+        fatal("Serializeable::create: no 'type' entry in section '%s'.\n",
+              section);
     }
 
-    // look up className to get appropriate createFunc
-    if (classMap->find(simObjClassName) == classMap->end()) {
-        cerr << "Simulator object class '" << simObjClassName << "' not found."
-             << endl;
-        abort();
+    CreateFunc createFunc = (*classMap)[className];
+
+    if (createFunc == NULL) {
+        fatal("Serializeable::create: no create function for class '%s'.\n",
+              className);
     }
 
-    CreateFunc createFunc = (*classMap)[simObjClassName];
+    Serializeable *object = createFunc(cp, section);
 
-    // builder instance
-    SerializeableBuilder *objectBuilder = (*createFunc)();
+    assert(object != NULL);
 
-    assert(objectBuilder != NULL);
+    return object;
+}
 
-    // now create the actual simulation object
-    Serializeable *object = objectBuilder->create();
 
-    assert(object != NULL);
+Serializeable *
+Serializeable::create(Checkpoint *cp, const std::string &section)
+{
+    Serializeable *object = SerializeableClass::createObject(cp, section);
+    object->unserialize(cp, section);
+    return object;
+}
 
-    // done with the SerializeableBuilder now
-    delete objectBuilder;
 
-    return object;
+Checkpoint::Checkpoint(const std::string &filename, const std::string &path,
+                       const ConfigNode *_configNode)
+    : db(new IniFile), basePath(path), configNode(_configNode)
+{
+    if (!db->load(filename)) {
+        fatal("Can't load checkpoint file '%s'\n", filename);
+    }
+
+    mainEventQueue.unserialize(this, "MainEventQueue");
+}
+
+
+bool
+Checkpoint::find(const std::string &section, const std::string &entry,
+                 std::string &value)
+{
+    return db->find(section, entry, value);
 }
 
+
+bool
+Checkpoint::findObj(const std::string &section, const std::string &entry,
+                    Serializeable *&value)
+{
+    string path;
+
+    if (!db->find(section, entry, path))
+        return false;
+
+    if ((value = configNode->resolveSimObject(path)) != NULL)
+        return true;
+
+    if ((value = objMap[path]) != NULL)
+        return true;
+
+    return false;
+}

diff --git a/sim/serialize.hh b/sim/serialize.hh
index 4e0dbd1bd9313e62576afe6957451c0a206ca82b..b615e6527d7dd57f1364c78969b9ba79819438c3 100644 (file)
--- a/sim/serialize.hh
+++ b/sim/serialize.hh
@@ -41,13 +41,14 @@
 #include "sim/host.hh"
 #include "sim/configfile.hh"
 
-class IniFile;
+class Serializeable;
+class Checkpoint;
 
 template <class T>
 void paramOut(std::ostream &os, const std::string &name, const T& param);
 
 template <class T>
-void paramIn(const IniFile *db, const std::string &section,
+void paramIn(Checkpoint *cp, const std::string &section,
              const std::string &name, T& param);
 
 template <class T>
@@ -55,16 +56,21 @@ void arrayParamOut(std::ostream &os, const std::string &name,
                    const T *param, int size);
 
 template <class T>
-void arrayParamIn(const IniFile *db, const std::string &section,
+void arrayParamIn(Checkpoint *cp, const std::string &section,
                   const std::string &name, T *param, int size);
 
+void
+objParamIn(Checkpoint *cp, const std::string &section,
+           const std::string &name, Serializeable * &param);
+
+
 //
 // These macros are streamlined to use in serialize/unserialize
 // functions.  It's assumed that serialize() has a parameter 'os' for
-// the ostream, and unserialize() has parameters 'db' and 'section'.
+// the ostream, and unserialize() has parameters 'cp' and 'section'.
 #define SERIALIZE_SCALAR(scalar)       paramOut(os, #scalar, scalar)
 
-#define UNSERIALIZE_SCALAR(scalar)     paramIn(db, section, #scalar, scalar)
+#define UNSERIALIZE_SCALAR(scalar)     paramIn(cp, section, #scalar, scalar)
 
 // ENUMs are like SCALARs, but we cast them to ints on the way out
 #define SERIALIZE_ENUM(scalar)         paramOut(os, #scalar, (int)scalar)
@@ -72,7 +78,7 @@ void arrayParamIn(const IniFile *db, const std::string &section,
 #define UNSERIALIZE_ENUM(scalar)               \
  do {                                          \
     int tmp;                                   \
-    paramIn(db, section, #scalar, tmp);                \
+    paramIn(cp, section, #scalar, tmp);                \
     scalar = (typeof(scalar))tmp;              \
   } while (0)
 
@@ -80,7 +86,16 @@ void arrayParamIn(const IniFile *db, const std::string &section,
         arrayParamOut(os, #member, member, size)
 
 #define UNSERIALIZE_ARRAY(member, size)        \
-        arrayParamIn(db, section, #member, member, size)
+        arrayParamIn(cp, section, #member, member, size)
+
+#define SERIALIZE_OBJPTR(objptr)       paramOut(os, #objptr, (objptr)->name())
+
+#define UNSERIALIZE_OBJPTR(objptr)                     \
+  do {                                                 \
+    Serializeable *sptr;                               \
+    objParamIn(cp, section, #objptr, sptr);            \
+    objptr = dynamic_cast<typeof(objptr)>(sptr);       \
+  } while (0)
 
 /*
  * Basic support for object serialization.
@@ -113,7 +128,10 @@ class Serializeable
 
     virtual void nameChildren() {}
     virtual void serialize(std::ostream& os) {}
-    virtual void unserialize(const IniFile *db, const std::string &section) {}
+    virtual void unserialize(Checkpoint *cp, const std::string &section) {}
+
+    static Serializeable *create(Checkpoint *cp,
+                                 const std::string &section);
 };
 
 class Serializer
@@ -187,7 +205,8 @@ class SerializeableClass
     // for the object (specified by the second string argument), and
     // an optional config hierarchy node (specified by the third
     // argument).  A pointer to the new SerializeableBuilder is returned.
-    typedef SerializeableBuilder *(*CreateFunc)();
+    typedef Serializeable *(*CreateFunc)(Checkpoint *cp,
+                                         const std::string &section);
 
     static std::map<std::string,CreateFunc> *classMap;
 
@@ -200,9 +219,8 @@ class SerializeableClass
 
     // create Serializeable given name of class and pointer to
     // configuration hierarchy node
-    static Serializeable *createObject(IniFile &configDB,
-                                       const std::string &configClassName);
-
+    static Serializeable *createObject(Checkpoint *cp,
+                                       const std::string &section);
 };
 
 //
@@ -210,29 +228,29 @@ class SerializeableClass
 // SerializeableBuilder and SerializeableClass objects
 //
 
-#define CREATE_SERIALIZEABLE(OBJ_CLASS)                                \
-OBJ_CLASS *OBJ_CLASS##Builder::create()
-
-#define REGISTER_SERIALIZEABLE(CLASS_NAME, OBJ_CLASS)          \
-class OBJ_CLASS##Builder : public SerializeableBuilder         \
-{                                                              \
-  public:                                                      \
-                                                                \
-    OBJ_CLASS##Builder() {}                                    \
-    virtual ~OBJ_CLASS##Builder() {}                           \
-                                                                \
-    OBJ_CLASS *create();                                       \
-};                                                             \
-                                                                \
-                                                                \
-SerializeableBuilder *                                         \
-new##OBJ_CLASS##Builder()                                      \
-{                                                              \
-    return new OBJ_CLASS##Builder();                           \
-}                                                              \
-                                                                \
-SerializeableClass the##OBJ_CLASS##Class(CLASS_NAME,           \
-                                     new##OBJ_CLASS##Builder);
+#define REGISTER_SERIALIZEABLE(CLASS_NAME, OBJ_CLASS)                     \
+SerializeableClass the##OBJ_CLASS##Class(CLASS_NAME,                      \
+                                         OBJ_CLASS::createForUnserialize);
+
+class Checkpoint
+{
+  private:
+
+    IniFile *db;
+    const std::string basePath;
+    const ConfigNode *configNode;
+    std::map<std::string, Serializeable*> objMap;
+
+  public:
+    Checkpoint(const std::string &filename, const std::string &path,
+               const ConfigNode *_configNode);
+
+    bool find(const std::string &section, const std::string &entry,
+              std::string &value);
+
+    bool findObj(const std::string &section, const std::string &entry,
+                 Serializeable *&value);
+};
 
 
 //