[viewcompiler] Add static field get instructions to DexBuilder

This allows us to generate code that can read static fields in a class. Once we
include several other field operations, we will be able to generate more
specialized inflation code in the view compiler.

Bug: 111895153
Change-Id: Ia11195b1cea6d5a3ddbc60d972922586a062c853

3 files changed, 35 insertions, 2 deletions

diff --git a/startop/view_compiler/dex_builder_test/Android.bp b/startop/view_compiler/dex_builder_test/Android.bp
index ac60e966fe43..9ad1ca1ef48e 100644
--- a/startop/view_compiler/dex_builder_test/Android.bp
+++ b/startop/view_compiler/dex_builder_test/Android.bp
@@ -39,6 +39,7 @@ android_test {
     srcs: [
         "src/android/startop/test/DexBuilderTest.java",
         "src/android/startop/test/LayoutCompilerTest.java",
+        "src/android/startop/test/TestClass.java",
     ],
     sdk_version: "current",
     data: [":generate_dex_testcases", ":generate_compiled_layout1", ":generate_compiled_layout2"],
diff --git a/startop/view_compiler/dex_builder_test/src/android/startop/test/DexBuilderTest.java b/startop/view_compiler/dex_builder_test/src/android/startop/test/DexBuilderTest.java
index 42d4161ee81e..df11bfafd357 100644
--- a/startop/view_compiler/dex_builder_test/src/android/startop/test/DexBuilderTest.java
+++ b/startop/view_compiler/dex_builder_test/src/android/startop/test/DexBuilderTest.java
@@ -28,10 +28,10 @@ import org.junit.Test;
 
 // Adding tests here requires changes in several other places. See README.md in
 // the view_compiler directory for more information.
-public class DexBuilderTest {
+public final class DexBuilderTest {
   static ClassLoader loadDexFile(String filename) throws Exception {
     return new PathClassLoader("/data/local/tmp/dex-builder-test/" + filename,
-        ClassLoader.getSystemClassLoader());
+        DexBuilderTest.class.getClassLoader());
   }
 
   public void hello() {}
@@ -171,4 +171,13 @@ public class DexBuilderTest {
     }
     Assert.assertTrue(castFailed);
   }
+
+  @Test
+  public void readStaticField() throws Exception {
+    ClassLoader loader = loadDexFile("simple.dex");
+    Class clazz = loader.loadClass("android.startop.test.testcases.SimpleTests");
+    Method method = clazz.getMethod("readStaticField");
+    TestClass.staticInteger = 5;
+    Assert.assertEquals(5, method.invoke(null));
+  }
 }
diff --git a/startop/view_compiler/dex_builder_test/src/android/startop/test/TestClass.java b/startop/view_compiler/dex_builder_test/src/android/startop/test/TestClass.java
new file mode 100644
index 000000000000..dd7792306030
--- /dev/null
+++ b/startop/view_compiler/dex_builder_test/src/android/startop/test/TestClass.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+package android.startop.test;
+
+ /**
+ * A simple class to help test DexBuilder.
+ */
+public final class TestClass {
+    public static int staticInteger;
+
+    public int instanceField;
+}