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/Android.bp b/runtime/openjdkjvmti/Android.bp
index 0f9fbb2..6105fec 100644
--- a/runtime/openjdkjvmti/Android.bp
+++ b/runtime/openjdkjvmti/Android.bp
@@ -21,6 +21,7 @@
            "object_tagging.cc",
            "OpenjdkJvmTi.cc",
            "ti_class.cc",
+           "ti_field.cc",
            "ti_heap.cc",
            "ti_method.cc",
            "ti_stack.cc",
diff --git a/runtime/openjdkjvmti/OpenjdkJvmTi.cc b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
index f46c25c..ddfa96a 100644
--- a/runtime/openjdkjvmti/OpenjdkJvmTi.cc
+++ b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
@@ -47,6 +47,7 @@
 #include "thread-inl.h"
 #include "thread_list.h"
 #include "ti_class.h"
+#include "ti_field.h"
 #include "ti_heap.h"
 #include "ti_method.h"
 #include "ti_redefine.h"
@@ -640,28 +641,28 @@
                                  char** name_ptr,
                                  char** signature_ptr,
                                  char** generic_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return FieldUtil::GetFieldName(env, klass, field, name_ptr, signature_ptr, generic_ptr);
   }
 
   static jvmtiError GetFieldDeclaringClass(jvmtiEnv* env,
                                            jclass klass,
                                            jfieldID field,
                                            jclass* declaring_class_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return FieldUtil::GetFieldDeclaringClass(env, klass, field, declaring_class_ptr);
   }
 
   static jvmtiError GetFieldModifiers(jvmtiEnv* env,
                                       jclass klass,
                                       jfieldID field,
                                       jint* modifiers_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return FieldUtil::GetFieldModifiers(env, klass, field, modifiers_ptr);
   }
 
   static jvmtiError IsFieldSynthetic(jvmtiEnv* env,
                                      jclass klass,
                                      jfieldID field,
                                      jboolean* is_synthetic_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return FieldUtil::IsFieldSynthetic(env, klass, field, is_synthetic_ptr);
   }
 
   static jvmtiError GetMethodName(jvmtiEnv* env,
diff --git a/runtime/openjdkjvmti/ti_field.cc b/runtime/openjdkjvmti/ti_field.cc
new file mode 100644
index 0000000..a762830
--- /dev/null
+++ b/runtime/openjdkjvmti/ti_field.cc
@@ -0,0 +1,171 @@
+/* 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.
+ */
+
+#include "ti_field.h"
+
+#include "art_jvmti.h"
+#include "art_field-inl.h"
+#include "base/enums.h"
+#include "jni_internal.h"
+#include "modifiers.h"
+#include "scoped_thread_state_change-inl.h"
+#include "thread-inl.h"
+
+namespace openjdkjvmti {
+
+// Note: For all these functions, we could do a check that the field actually belongs to the given
+//       class. But the spec seems to assume a certain encoding of the field ID, and so doesn't
+//       specify any errors.
+
+jvmtiError FieldUtil::GetFieldName(jvmtiEnv* env,
+                                   jclass klass,
+                                   jfieldID field,
+                                   char** name_ptr,
+                                   char** signature_ptr,
+                                   char** generic_ptr) {
+  if (klass == nullptr) {
+    return ERR(INVALID_CLASS);
+  }
+  if (field == nullptr) {
+    return ERR(INVALID_FIELDID);
+  }
+
+  art::ScopedObjectAccess soa(art::Thread::Current());
+  art::ArtField* art_field = art::jni::DecodeArtField(field);
+
+  JvmtiUniquePtr name_copy;
+  if (name_ptr != nullptr) {
+    const char* field_name = art_field->GetName();
+    if (field_name == nullptr) {
+      field_name = "<error>";
+    }
+    unsigned char* tmp;
+    jvmtiError ret = CopyString(env, field_name, &tmp);
+    if (ret != ERR(NONE)) {
+      return ret;
+    }
+    name_copy = MakeJvmtiUniquePtr(env, tmp);
+    *name_ptr = reinterpret_cast<char*>(tmp);
+  }
+
+  JvmtiUniquePtr signature_copy;
+  if (signature_ptr != nullptr) {
+    const char* sig = art_field->GetTypeDescriptor();
+    unsigned char* tmp;
+    jvmtiError ret = CopyString(env, sig, &tmp);
+    if (ret != ERR(NONE)) {
+      return ret;
+    }
+    signature_copy = MakeJvmtiUniquePtr(env, tmp);
+    *signature_ptr = reinterpret_cast<char*>(tmp);
+  }
+
+  // TODO: Support generic signature.
+  if (generic_ptr != nullptr) {
+    *generic_ptr = nullptr;
+  }
+
+  // Everything is fine, release the buffers.
+  name_copy.release();
+  signature_copy.release();
+
+  return ERR(NONE);
+}
+
+jvmtiError FieldUtil::GetFieldDeclaringClass(jvmtiEnv* env ATTRIBUTE_UNUSED,
+                                             jclass klass,
+                                             jfieldID field,
+                                             jclass* declaring_class_ptr) {
+  if (klass == nullptr) {
+    return ERR(INVALID_CLASS);
+  }
+  if (field == nullptr) {
+    return ERR(INVALID_FIELDID);
+  }
+  if (declaring_class_ptr == nullptr) {
+    return ERR(NULL_POINTER);
+  }
+
+  art::ScopedObjectAccess soa(art::Thread::Current());
+  art::ArtField* art_field = art::jni::DecodeArtField(field);
+  art::ObjPtr<art::mirror::Class> field_klass = art_field->GetDeclaringClass();
+
+  *declaring_class_ptr = soa.AddLocalReference<jclass>(field_klass);
+
+  return ERR(NONE);
+}
+
+jvmtiError FieldUtil::GetFieldModifiers(jvmtiEnv* env ATTRIBUTE_UNUSED,
+                                        jclass klass,
+                                        jfieldID field,
+                                        jint* modifiers_ptr) {
+  if (klass == nullptr) {
+    return ERR(INVALID_CLASS);
+  }
+  if (field == nullptr) {
+    return ERR(INVALID_FIELDID);
+  }
+  if (modifiers_ptr == nullptr) {
+    return ERR(NULL_POINTER);
+  }
+
+  art::ScopedObjectAccess soa(art::Thread::Current());
+  art::ArtField* art_field = art::jni::DecodeArtField(field);
+  // Note: Keep this code in sync with Field.getModifiers.
+  uint32_t modifiers = art_field->GetAccessFlags() & 0xFFFF;
+
+  *modifiers_ptr = modifiers;
+  return ERR(NONE);
+}
+
+jvmtiError FieldUtil::IsFieldSynthetic(jvmtiEnv* env ATTRIBUTE_UNUSED,
+                                       jclass klass,
+                                       jfieldID field,
+                                       jboolean* is_synthetic_ptr) {
+  if (klass == nullptr) {
+    return ERR(INVALID_CLASS);
+  }
+  if (field == nullptr) {
+    return ERR(INVALID_FIELDID);
+  }
+  if (is_synthetic_ptr == nullptr) {
+    return ERR(NULL_POINTER);
+  }
+
+  art::ScopedObjectAccess soa(art::Thread::Current());
+  art::ArtField* art_field = art::jni::DecodeArtField(field);
+  uint32_t modifiers = art_field->GetAccessFlags();
+
+  *is_synthetic_ptr = ((modifiers & art::kAccSynthetic) != 0) ? JNI_TRUE : JNI_FALSE;
+  return ERR(NONE);
+}
+
+}  // namespace openjdkjvmti
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_
diff --git a/runtime/openjdkjvmti/ti_method.cc b/runtime/openjdkjvmti/ti_method.cc
index a0a0923..02b6090 100644
--- a/runtime/openjdkjvmti/ti_method.cc
+++ b/runtime/openjdkjvmti/ti_method.cc
@@ -37,6 +37,7 @@
 #include "jni_internal.h"
 #include "modifiers.h"
 #include "scoped_thread_state_change-inl.h"
+#include "thread-inl.h"
 
 namespace openjdkjvmti {
 
diff --git a/test/918-fields/build b/test/918-fields/build
new file mode 100755
index 0000000..898e2e5
--- /dev/null
+++ b/test/918-fields/build
@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+./default-build "$@" --experimental agents
diff --git a/test/918-fields/expected.txt b/test/918-fields/expected.txt
new file mode 100644
index 0000000..39d3e70
--- /dev/null
+++ b/test/918-fields/expected.txt
@@ -0,0 +1,16 @@
+[PI, D, null]
+class java.lang.Math
+25
+false
+[value, I, null]
+class java.lang.Integer
+18
+false
+[this$0, LMain;, null]
+class Main$Foo
+4112
+true
+[VAL, I, null]
+interface Main$Bar
+25
+false
diff --git a/test/918-fields/fields.cc b/test/918-fields/fields.cc
new file mode 100644
index 0000000..c7fca06
--- /dev/null
+++ b/test/918-fields/fields.cc
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "fields.h"
+
+#include <stdio.h>
+
+#include "base/macros.h"
+#include "jni.h"
+#include "openjdkjvmti/jvmti.h"
+#include "ScopedLocalRef.h"
+
+#include "ti-agent/common_helper.h"
+#include "ti-agent/common_load.h"
+
+namespace art {
+namespace Test918Fields {
+
+extern "C" JNIEXPORT jobjectArray JNICALL Java_Main_getFieldName(
+    JNIEnv* env, jclass klass, jobject field) {
+  jfieldID id = env->FromReflectedField(field);
+
+  char* name;
+  char* sig;
+  char* gen;
+  // Note: technically putting the caller class here is wrong, but we don't need it, anyways.
+  jvmtiError result = jvmti_env->GetFieldName(klass, id, &name, &sig, &gen);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running GetFieldName: %s\n", err);
+    return nullptr;
+  }
+
+  auto callback = [&](jint i) {
+    if (i == 0) {
+      return name == nullptr ? nullptr : env->NewStringUTF(name);
+    } else if (i == 1) {
+      return sig == nullptr ? nullptr : env->NewStringUTF(sig);
+    } else {
+      return gen == nullptr ? nullptr : env->NewStringUTF(gen);
+    }
+  };
+  jobjectArray ret = CreateObjectArray(env, 3, "java/lang/String", callback);
+
+  // Need to deallocate the strings.
+  if (name != nullptr) {
+    jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(name));
+  }
+  if (sig != nullptr) {
+    jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(sig));
+  }
+  if (gen != nullptr) {
+    jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(gen));
+  }
+
+  // Also run GetMethodName with all parameter pointers null to check for segfaults.
+  jvmtiError result2 = jvmti_env->GetFieldName(klass, id, nullptr, nullptr, nullptr);
+  if (result2 != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result2, &err);
+    printf("Failure running GetFieldName(null, null, null): %s\n", err);
+    return nullptr;
+  }
+
+  return ret;
+}
+
+extern "C" JNIEXPORT jclass JNICALL Java_Main_getFieldDeclaringClass(
+    JNIEnv* env, jclass klass, jobject field) {
+  jfieldID id = env->FromReflectedField(field);
+
+  jclass declaring_class;
+  jvmtiError result = jvmti_env->GetFieldDeclaringClass(klass, id, &declaring_class);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running GetFieldDeclaringClass: %s\n", err);
+    return nullptr;
+  }
+
+  return declaring_class;
+}
+
+extern "C" JNIEXPORT jint JNICALL Java_Main_getFieldModifiers(
+    JNIEnv* env, jclass klass, jobject field) {
+  jfieldID id = env->FromReflectedField(field);
+
+  jint modifiers;
+  jvmtiError result = jvmti_env->GetFieldModifiers(klass, id, &modifiers);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running GetFieldModifiers: %s\n", err);
+    return 0;
+  }
+
+  return modifiers;
+}
+
+extern "C" JNIEXPORT jboolean JNICALL Java_Main_isFieldSynthetic(
+    JNIEnv* env, jclass klass, jobject field) {
+  jfieldID id = env->FromReflectedField(field);
+
+  jboolean synth;
+  jvmtiError result = jvmti_env->IsFieldSynthetic(klass, id, &synth);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running IsFieldSynthetic: %s\n", err);
+    return 0;
+  }
+
+  return synth;
+}
+
+// Don't do anything
+jint OnLoad(JavaVM* vm,
+            char* options ATTRIBUTE_UNUSED,
+            void* reserved ATTRIBUTE_UNUSED) {
+  if (vm->GetEnv(reinterpret_cast<void**>(&jvmti_env), JVMTI_VERSION_1_0)) {
+    printf("Unable to get jvmti env!\n");
+    return 1;
+  }
+  SetAllCapabilities(jvmti_env);
+  return 0;
+}
+
+}  // namespace Test918Fields
+}  // namespace art
diff --git a/test/918-fields/fields.h b/test/918-fields/fields.h
new file mode 100644
index 0000000..89bd161
--- /dev/null
+++ b/test/918-fields/fields.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_TEST_918_FIELDS_FIELDS_H_
+#define ART_TEST_918_FIELDS_FIELDS_H_
+
+#include <jni.h>
+
+namespace art {
+namespace Test918Fields {
+
+jint OnLoad(JavaVM* vm, char* options, void* reserved);
+
+}  // namespace Test918Fields
+}  // namespace art
+
+#endif  // ART_TEST_918_FIELDS_FIELDS_H_
diff --git a/test/918-fields/info.txt b/test/918-fields/info.txt
new file mode 100644
index 0000000..875a5f6
--- /dev/null
+++ b/test/918-fields/info.txt
@@ -0,0 +1 @@
+Tests basic functions in the jvmti plugin.
diff --git a/test/918-fields/run b/test/918-fields/run
new file mode 100755
index 0000000..4379349
--- /dev/null
+++ b/test/918-fields/run
@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+./default-run "$@" --experimental agents \
+                   --experimental runtime-plugins \
+                   --jvmti
diff --git a/test/918-fields/src/Main.java b/test/918-fields/src/Main.java
new file mode 100644
index 0000000..8af6e7b
--- /dev/null
+++ b/test/918-fields/src/Main.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.lang.reflect.Field;
+import java.util.Arrays;
+
+public class Main {
+  public static void main(String[] args) throws Exception {
+    System.loadLibrary(args[1]);
+
+    doTest();
+  }
+
+  public static void doTest() throws Exception {
+    testField(Math.class, "PI");
+    testField(Integer.class, "value");
+    testField(Foo.class, "this$0");
+    testField(Bar.class, "VAL");
+  }
+
+  private static void testField(Class<?> base, String fieldName)
+      throws Exception {
+    Field f = base.getDeclaredField(fieldName);
+    String[] result = getFieldName(f);
+    System.out.println(Arrays.toString(result));
+
+    Class<?> declClass = getFieldDeclaringClass(f);
+    if (base != declClass) {
+      throw new RuntimeException("Declaring class not equal: " + base + " vs " + declClass);
+    }
+    System.out.println(declClass);
+
+    int modifiers = getFieldModifiers(f);
+    if (modifiers != f.getModifiers()) {
+      throw new RuntimeException("Modifiers not equal: " + f.getModifiers() + " vs " + modifiers);
+    }
+    System.out.println(modifiers);
+
+    boolean synth = isFieldSynthetic(f);
+    if (synth != f.isSynthetic()) {
+      throw new RuntimeException("Synthetic not equal: " + f.isSynthetic() + " vs " + synth);
+    }
+    System.out.println(synth);
+  }
+
+  private static native String[] getFieldName(Field f);
+  private static native Class<?> getFieldDeclaringClass(Field f);
+  private static native int getFieldModifiers(Field f);
+  private static native boolean isFieldSynthetic(Field f);
+
+  private class Foo {
+  }
+
+  private static interface Bar {
+    public static int VAL = 1;
+  }
+}
diff --git a/test/Android.bp b/test/Android.bp
index 5a2c902..26c4f93 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -260,6 +260,7 @@
         "911-get-stack-trace/stack_trace.cc",
         "912-classes/classes.cc",
         "913-heaps/heaps.cc",
+        "918-fields/fields.cc",
     ],
     shared_libs: [
         "libbase",
diff --git a/test/Android.run-test.mk b/test/Android.run-test.mk
index ec1f6ba..90dd36e 100644
--- a/test/Android.run-test.mk
+++ b/test/Android.run-test.mk
@@ -290,6 +290,7 @@
   915-obsolete-2 \
   916-obsolete-jit \
   917-fields-transformation \
+  918-fields \
 
 ifneq (,$(filter target,$(TARGET_TYPES)))
   ART_TEST_KNOWN_BROKEN += $(call all-run-test-names,target,$(RUN_TYPES),$(PREBUILD_TYPES), \
diff --git a/test/ti-agent/common_load.cc b/test/ti-agent/common_load.cc
index 79c17d7..821e254 100644
--- a/test/ti-agent/common_load.cc
+++ b/test/ti-agent/common_load.cc
@@ -37,6 +37,7 @@
 #include "911-get-stack-trace/stack_trace.h"
 #include "912-classes/classes.h"
 #include "913-heaps/heaps.h"
+#include "918-fields/fields.h"
 
 namespace art {
 
@@ -70,6 +71,7 @@
   { "915-obsolete-2", common_redefine::OnLoad, nullptr },
   { "916-obsolete-jit", common_redefine::OnLoad, nullptr },
   { "917-fields-transformation", common_redefine::OnLoad, nullptr },
+  { "918-fields", Test918Fields::OnLoad, nullptr },
 };
 
 static AgentLib* FindAgent(char* name) {