VM support for running Kernel binaries.

runtime/vm/kernel_reader.h

+// Copyright (c) 2016, 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.
+
+#ifndef VM_KERNEL_READER_H_
+#define VM_KERNEL_READER_H_
+
+#include <map>
+
+#include "vm/kernel.h"
+#include "vm/kernel_to_il.h"
+#include "vm/object.h"
+
+namespace dart {
+namespace kernel {
+
+class KernelReader;
+
+class BuildingTranslationHelper : public TranslationHelper {
+ public:
+  BuildingTranslationHelper(KernelReader* reader, dart::Thread* thread,
+                            dart::Zone* zone, Isolate* isolate)
+      : TranslationHelper(thread, zone, isolate), reader_(reader) {}
+  virtual ~BuildingTranslationHelper() {}
+
+  virtual void SetFinalize(bool finalize);
+
+  virtual RawLibrary* LookupLibraryByKernelLibrary(Library* library);
+  virtual RawClass* LookupClassByKernelClass(Class* klass);
+
+ private:
+  KernelReader* reader_;
+};
+
+template <typename KernelType, typename VmType>
+class Mapping {
+ public:
+  bool Lookup(KernelType* node, VmType** handle) {
+    typename MapType::iterator value = map_.find(node);
+    if (value != map_.end()) {
+      *handle = value->second;
+      return true;
+    }
+    return false;
+  }
+
+  void Insert(KernelType* node, VmType* object) { map_[node] = object; }
+
+ private:
+  typedef typename std::map<KernelType*, VmType*> MapType;
+  MapType map_;
+};
+
+class KernelReader {
+ public:
+  KernelReader(const uint8_t* buffer, intptr_t len, bool bootstrapping = false)
+      : thread_(dart::Thread::Current()),
+        zone_(thread_->zone()),
+        isolate_(thread_->isolate()),
+        translation_helper_(this, thread_, zone_, isolate_),
+        type_translator_(&translation_helper_, &active_class_, !bootstrapping),
+        bootstrapping_(bootstrapping),
+        finalize_(!bootstrapping),
+        buffer_(buffer),
+        buffer_length_(len) {}
+
+  // Returns either a library or a failure object.
+  dart::Object& ReadProgram();
+
+  static void SetupFunctionParameters(TranslationHelper translation_helper_,
+                                      DartTypeTranslator type_translator_,
+                                      const dart::Class& owner,
+                                      const dart::Function& function,
+                                      FunctionNode* kernel_function,
+                                      bool is_method, bool is_closure);
+
+  void ReadLibrary(Library* kernel_library);
+
+ private:
+  friend class BuildingTranslationHelper;
+
+  void ReadPreliminaryClass(dart::Class* klass, Class* kernel_klass);
+  void ReadClass(const dart::Library& library, Class* kernel_klass);
+  void ReadProcedure(const dart::Library& library, const dart::Class& owner,
+                     Procedure* procedure, Class* kernel_klass = NULL);
+
+  void GenerateFieldAccessors(const dart::Class& klass,
+                              const dart::Field& field, Field* kernel_field);
+
+  void SetupFieldAccessorFunction(const dart::Class& klass,
+                                  const dart::Function& function);
+
+  dart::Library& LookupLibrary(Library* library);
+  dart::Class& LookupClass(Class* klass);
+
+  dart::RawFunction::Kind GetFunctionType(Procedure* kernel_procedure);
+
+  dart::Thread* thread_;
+  dart::Zone* zone_;
+  dart::Isolate* isolate_;
+  ActiveClass active_class_;
+  BuildingTranslationHelper translation_helper_;
+  DartTypeTranslator type_translator_;
+
+  bool bootstrapping_;
+
+  // Should created classes be finalized when they are created?
+  bool finalize_;
+
+  const uint8_t* buffer_;
+  intptr_t buffer_length_;
+
+  Mapping<Library, dart::Library> libraries_;
+  Mapping<Class, dart::Class> classes_;
+};
+
+}  // namespace kernel
+}  // namespace dart
+
+#endif  // VM_KERNEL_READER_H_