VM support for running Kernel binaries.

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
diff --git a/runtime/vm/dart_api_impl.cc b/runtime/vm/dart_api_impl.cc
index f6f3ab841fbf2278defc14a570a591ded15f02dd..490d95f715c24c923ccf522a49d184a06b642fba 100644
--- a/runtime/vm/dart_api_impl.cc
+++ b/runtime/vm/dart_api_impl.cc
@@ -17,6 +17,9 @@
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
+#if !defined(DART_PRECOMPILED_RUNTIME)
+#include "vm/kernel_reader.h"
+#endif
 #include "vm/exceptions.h"
 #include "vm/flags.h"
 #include "vm/growable_array.h"
@@ -5392,6 +5395,41 @@ DART_EXPORT Dart_Handle Dart_LoadScriptFromSnapshot(const uint8_t* buffer,
 }
 
 
+DART_EXPORT Dart_Handle Dart_LoadKernel(const uint8_t* buffer,
+                                        intptr_t buffer_len) {
+  API_TIMELINE_DURATION;
+  DARTSCOPE(Thread::Current());
+  StackZone zone(T);
+
+#if defined(DART_PRECOMPILED_RUNTIME) && !defined(DART_PRECOMPILER)
+  return Api::NewError("%s: Can't load Kernel files from precompiled runtime.",
+                       CURRENT_FUNC);
+#else
+  Isolate* I = T->isolate();
+
+  Library& library = Library::Handle(Z, I->object_store()->root_library());
+  if (!library.IsNull()) {
+    const String& library_url = String::Handle(Z, library.url());
+    return Api::NewError("%s: A script has already been loaded from '%s'.",
+                         CURRENT_FUNC, library_url.ToCString());
+  }
+  CHECK_CALLBACK_STATE(T);
+  CHECK_COMPILATION_ALLOWED(I);
+
+  // TODO(27588): Memory leak!
+  kernel::KernelReader* reader = new kernel::KernelReader(buffer, buffer_len);
+  const Object& tmp = reader->ReadProgram();
+  if (tmp.IsError()) {
+    return Api::NewHandle(T, tmp.raw());
+  }
+  library ^= tmp.raw();
+  library.set_debuggable(false);
+  I->object_store()->set_root_library(library);
+  return Api::NewHandle(T, library.raw());
+#endif
+}
+
+
 DART_EXPORT Dart_Handle Dart_RootLibrary() {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();