ART: Add Field methods

Add GetFieldName, GetFieldDeclaringClass, GetFieldModifiers
and IsFieldSynthetic support. Add tests.

Bug: 34113943
Test: m test-art-host-run-test-918-fields
Change-Id: Id33b8c54c250f73f0658ec45ccb2b55eccb37623
diff --git a/runtime/openjdkjvmti/ti_field.h b/runtime/openjdkjvmti/ti_field.h
new file mode 100644
index 0000000..9a29f81
--- /dev/null
+++ b/runtime/openjdkjvmti/ti_field.h
@@ -0,0 +1,67 @@
+/* Copyright (C) 2016 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h.  The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef ART_RUNTIME_OPENJDKJVMTI_TI_FIELD_H_
+#define ART_RUNTIME_OPENJDKJVMTI_TI_FIELD_H_
+
+#include "jni.h"
+#include "jvmti.h"
+
+namespace openjdkjvmti {
+
+class FieldUtil {
+ public:
+  static jvmtiError GetFieldName(jvmtiEnv* env,
+                                 jclass klass,
+                                 jfieldID field,
+                                 char** name_ptr,
+                                 char** signature_ptr,
+                                 char** generic_ptr);
+
+  static jvmtiError GetFieldDeclaringClass(jvmtiEnv* env,
+                                           jclass klass,
+                                           jfieldID field,
+                                           jclass* declaring_class_ptr);
+
+  static jvmtiError GetFieldModifiers(jvmtiEnv* env,
+                                      jclass klass,
+                                      jfieldID field,
+                                      jint* modifiers_ptr);
+
+  static jvmtiError IsFieldSynthetic(jvmtiEnv* env,
+                                     jclass klass,
+                                     jfieldID field,
+                                     jboolean* is_synthetic_ptr);
+};
+
+}  // namespace openjdkjvmti
+
+#endif  // ART_RUNTIME_OPENJDKJVMTI_TI_FIELD_H_