VM: [Kernel] Split kernel API into 3 steps: ([read binary], parse-binary, bootstrap, load program)

runtime/vm/object.cc

 // Copyright (c) 2012, 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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 1118 matching lines @@
 //
 // There are three possibilities:
 //   1. Running a Kernel binary.  This function will bootstrap from the KERNEL
 //      file.
 //   2. There is no snapshot.  This function will bootstrap from source.
 //   3. There is a snapshot.  The caller should initialize from the snapshot.
 //
 // A non-NULL kernel argument indicates (1).  A NULL kernel indicates (2) or
 // (3), depending on whether the VM is compiled with DART_NO_SNAPSHOT defined or
 // not.
-RawError* Object::Init(Isolate* isolate,
-                       const uint8_t* kernel_buffer,
-                       intptr_t kernel_buffer_length) {
+RawError* Object::Init(Isolate* isolate, kernel::Program* kernel_program) {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   ASSERT(isolate == thread->isolate());
 #if !defined(DART_PRECOMPILED_RUNTIME)
-  const bool is_kernel = (kernel_buffer != NULL);
+  const bool is_kernel = (kernel_program != NULL);
 #endif
   NOT_IN_PRODUCT(TimelineDurationScope tds(thread, Timeline::GetIsolateStream(),
                                            "Object::Init");)
 
 #if defined(DART_NO_SNAPSHOT)
   bool bootstrapping = true;
 #elif defined(DART_PRECOMPILED_RUNTIME)
   bool bootstrapping = false;
 #else
   bool bootstrapping = is_kernel;
@@ skipping 455 matching lines @@
     cls = object_store->null_class();
     type = Type::NewNonParameterizedType(cls);
     object_store->set_null_type(type);
 
     // Consider removing when/if Null becomes an ordinary class.
     type = object_store->object_type();
     cls.set_super_type(type);
 
     // Finish the initialization by compiling the bootstrap scripts containing
     // the base interfaces and the implementation of the internal classes.
-    const Error& error = Error::Handle(
-        zone, Bootstrap::DoBootstrapping(kernel_buffer, kernel_buffer_length));
+    const Error& error =
+        Error::Handle(zone, Bootstrap::DoBootstrapping(kernel_program));
     if (!error.IsNull()) {
       return error.raw();
     }
 
     ClassFinalizer::VerifyBootstrapClasses();
 
     // Set up the intrinsic state of all functions (core, math and typed data).
     Intrinsifier::InitializeState();
 
     // Set up recognized state of all functions (core, math and typed data).
@@ skipping 21132 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart