VM: Precompiled rodata snapshot.

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index a9ddae550a4ad3599a3b43cb7c7ec28ab146a2f3..74ff92ab5fa383064eac31bbf80de8a7b59227ac 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -45,6 +45,7 @@ ThreadPool* Dart::thread_pool_ = NULL;
 DebugInfo* Dart::pprof_symbol_generator_ = NULL;
 ReadOnlyHandles* Dart::predefined_handles_ = NULL;
 const uint8_t* Dart::instructions_snapshot_buffer_ = NULL;
+const uint8_t* Dart::data_snapshot_buffer_ = NULL;
 
 // Structure for managing read-only global handles allocation used for
 // creating global read-only handles that are pre created and initialized
@@ -72,6 +73,7 @@ class ReadOnlyHandles {
 
 const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
                            const uint8_t* instructions_snapshot,
+                           const uint8_t* data_snapshot,
                            Dart_IsolateCreateCallback create,
                            Dart_IsolateShutdownCallback shutdown,
                            Dart_FileOpenCallback file_open,
@@ -146,6 +148,8 @@ const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
     if (vm_isolate_snapshot != NULL) {
       if (instructions_snapshot != NULL) {
         vm_isolate_->SetupInstructionsSnapshotPage(instructions_snapshot);
+        ASSERT(data_snapshot != NULL);
+        vm_isolate_->SetupDataSnapshotPage(data_snapshot);
       }
       const Snapshot* snapshot = Snapshot::SetupFromBuffer(vm_isolate_snapshot);
       if (snapshot == NULL) {
@@ -155,6 +159,7 @@ const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
       VmIsolateSnapshotReader reader(snapshot->content(),
                                      snapshot->length(),
                                      instructions_snapshot,
+                                     data_snapshot,
                                      T);
       const Error& error = Error::Handle(reader.ReadVmIsolateSnapshot());
       if (!error.IsNull()) {
@@ -338,6 +343,7 @@ RawError* Dart::InitializeIsolate(const uint8_t* snapshot_buffer, void* data) {
     IsolateSnapshotReader reader(snapshot->content(),
                                  snapshot->length(),
                                  Dart::instructions_snapshot_buffer(),
+                                 Dart::data_snapshot_buffer(),
                                  T);
     const Error& error = Error::Handle(reader.ReadFullSnapshot());
     if (!error.IsNull()) {