ART: Add GetSignatureAnnotation to unstarted runtime

Add support for Class.getSignatureAnnotation to the unstarted
runtime. Refactor dex file annotation code to support transactions.

Bug: 34956610
Test: m
Test: m test-art-host-gtest-unstarted_runtime_test
Test: Device boots
Change-Id: I9f4a93e05ad6999c46c3bb1dbabe48a1ad6225b2
diff --git a/runtime/interpreter/unstarted_runtime.cc b/runtime/interpreter/unstarted_runtime.cc
index fc21945..4a321e6 100644
--- a/runtime/interpreter/unstarted_runtime.cc
+++ b/runtime/interpreter/unstarted_runtime.cc
@@ -445,6 +445,20 @@
   result->SetI(mirror::Class::GetInnerClassFlags(klass, default_value));
 }
 
+void UnstartedRuntime::UnstartedClassGetSignatureAnnotation(
+    Thread* self, ShadowFrame* shadow_frame, JValue* result, size_t arg_offset) {
+  StackHandleScope<1> hs(self);
+  Handle<mirror::Class> klass(hs.NewHandle(
+      reinterpret_cast<mirror::Class*>(shadow_frame->GetVRegReference(arg_offset))));
+
+  if (klass->IsProxyClass() || klass->GetDexCache() == nullptr) {
+    result->SetL(nullptr);
+    return;
+  }
+
+  result->SetL(annotations::GetSignatureAnnotationForClass(klass));
+}
+
 void UnstartedRuntime::UnstartedClassIsAnonymousClass(
     Thread* self, ShadowFrame* shadow_frame, JValue* result, size_t arg_offset) {
   StackHandleScope<1> hs(self);
diff --git a/runtime/interpreter/unstarted_runtime_list.h b/runtime/interpreter/unstarted_runtime_list.h
index 929b747..c6114da 100644
--- a/runtime/interpreter/unstarted_runtime_list.h
+++ b/runtime/interpreter/unstarted_runtime_list.h
@@ -31,6 +31,7 @@
   V(ClassGetDeclaringClass, "java.lang.Class java.lang.Class.getDeclaringClass()") \
   V(ClassGetEnclosingClass, "java.lang.Class java.lang.Class.getEnclosingClass()") \
   V(ClassGetInnerClassFlags, "int java.lang.Class.getInnerClassFlags(int)") \
+  V(ClassGetSignatureAnnotation, "java.lang.String[] java.lang.Class.getSignatureAnnotation()") \
   V(ClassIsAnonymousClass, "boolean java.lang.Class.isAnonymousClass()") \
   V(ClassLoaderGetResourceAsStream, "java.io.InputStream java.lang.ClassLoader.getResourceAsStream(java.lang.String)") \
   V(VmClassLoaderFindLoadedClass, "java.lang.Class java.lang.VMClassLoader.findLoadedClass(java.lang.ClassLoader, java.lang.String)") \
diff --git a/runtime/interpreter/unstarted_runtime_test.cc b/runtime/interpreter/unstarted_runtime_test.cc
index 3a0d0e7..4186c37 100644
--- a/runtime/interpreter/unstarted_runtime_test.cc
+++ b/runtime/interpreter/unstarted_runtime_test.cc
@@ -29,6 +29,8 @@
 #include "handle_scope-inl.h"
 #include "interpreter/interpreter_common.h"
 #include "mirror/class_loader.h"
+#include "mirror/object_array-inl.h"
+#include "mirror/object-inl.h"
 #include "mirror/string-inl.h"
 #include "runtime.h"
 #include "scoped_thread_state_change-inl.h"
@@ -1077,9 +1079,9 @@
   StackHandleScope<1> hs(self);
   ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
   Handle<mirror::Class> log_manager_class = hs.NewHandle(
-          class_linker->FindClass(self,
-                                  "Ljava/util/logging/LogManager;",
-                                  ScopedNullHandle<mirror::ClassLoader>()));
+      class_linker->FindClass(self,
+                              "Ljava/util/logging/LogManager;",
+                              ScopedNullHandle<mirror::ClassLoader>()));
   ASSERT_TRUE(log_manager_class.Get() != nullptr);
   ASSERT_TRUE(class_linker->EnsureInitialized(self, log_manager_class, true, true));
 }
@@ -1278,5 +1280,42 @@
   RunTest(runner, true, false);
 }
 
+TEST_F(UnstartedRuntimeTest, ClassGetSignatureAnnotation) {
+  Thread* self = Thread::Current();
+  ScopedObjectAccess soa(self);
+
+  StackHandleScope<1> hs(self);
+  ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
+  Handle<mirror::Class> list_class = hs.NewHandle(
+      class_linker->FindClass(self,
+                              "Ljava/util/List;",
+                              ScopedNullHandle<mirror::ClassLoader>()));
+  ASSERT_TRUE(list_class.Get() != nullptr);
+  ASSERT_TRUE(class_linker->EnsureInitialized(self, list_class, true, true));
+
+  JValue result;
+  ShadowFrame* shadow_frame = ShadowFrame::CreateDeoptimizedFrame(10, nullptr, nullptr, 0);
+
+  shadow_frame->SetVRegReference(0, list_class.Get());
+  UnstartedClassGetSignatureAnnotation(self, shadow_frame, &result, 0);
+  ASSERT_TRUE(result.GetL() != nullptr);
+  ASSERT_FALSE(self->IsExceptionPending());
+
+  ShadowFrame::DeleteDeoptimizedFrame(shadow_frame);
+
+  ASSERT_TRUE(result.GetL()->IsObjectArray());
+  ObjPtr<mirror::ObjectArray<mirror::Object>> array =
+      result.GetL()->AsObjectArray<mirror::Object>();
+  std::ostringstream oss;
+  for (int32_t i = 0; i != array->GetLength(); ++i) {
+    ObjPtr<mirror::Object> elem = array->Get(i);
+    ASSERT_TRUE(elem != nullptr);
+    ASSERT_TRUE(elem->IsString());
+    oss << elem->AsString()->ToModifiedUtf8();
+  }
+  std::string output_string = oss.str();
+  ASSERT_EQ(output_string, "<E:Ljava/lang/Object;>Ljava/lang/Object;Ljava/util/Collection<TE;>;");
+}
+
 }  // namespace interpreter
 }  // namespace art