Last snapshot bits to get working precompiled hello_world on x64.

runtime/vm/dart.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/dart.h"
 
 #include "vm/code_observers.h"
 #include "vm/cpu.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
@@ skipping 123 matching lines @@
     Object::InitNull(vm_isolate_);
     ObjectStore::Init(vm_isolate_);
     TargetCPUFeatures::InitOnce();
     Object::InitOnce(vm_isolate_);
     ArgumentsDescriptor::InitOnce();
     StubCode::InitOnce();
     Thread::InitOnceAfterObjectAndStubCode();
     // Now that the needed stub has been generated, set the stack limit.
     vm_isolate_->InitializeStackLimit();
     if (vm_isolate_snapshot != NULL) {
+      if (instructions_snapshot != NULL) {
+        vm_isolate_->SetupInstructionsSnapshotPage(instructions_snapshot);
+      }
       const Snapshot* snapshot = Snapshot::SetupFromBuffer(vm_isolate_snapshot);
       if (snapshot == NULL) {
         return "Invalid vm isolate snapshot seen.";
       }
       ASSERT(snapshot->kind() == Snapshot::kFull);
       VmIsolateSnapshotReader reader(snapshot->content(),
                                      snapshot->length(),
                                      instructions_snapshot,
                                      T);
       const Error& error = Error::Handle(reader.ReadVmIsolateSnapshot());
@@ skipping 144 matching lines @@
     }
   } else {
     // Populate the isolate's symbol table with all symbols from the
     // VM isolate. We do this so that when we generate a full snapshot
     // for the isolate we have a unified symbol table that we can then
     // read into the VM isolate.
     Symbols::AddPredefinedSymbolsToIsolate();
   }
 
   Object::VerifyBuiltinVtables();
+#if defined(DEBUG)
+  I->heap()->Verify(kForbidMarked);
+#endif
 
   {
     TimelineDurationScope tds(I, I->GetIsolateStream(), "StubCode::Init");
     StubCode::Init(I);
   }
 
-  MegamorphicCacheTable::InitMissHandler(I);
+  if (Object::IsRunningPrecompiledCode()) {
+    MegamorphicCacheTable::InitMissHandler(I);
+  }
   if (snapshot_buffer == NULL) {
     if (!I->object_store()->PreallocateObjects()) {
       return I->object_store()->sticky_error();
     }
   }
 
   I->heap()->EnableGrowthControl();
   I->set_init_callback_data(data);
   Api::SetupAcquiredError(I);
   if (FLAG_print_class_table) {
@@ skipping 56 matching lines @@
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 
 bool Dart::IsReadOnlyApiHandle(Dart_Handle handle) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->api_handles_.IsValidHandle(handle);
 }
 
 }  // namespace dart