| // Copyright (c) 2022, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| package com.android.tools.r8.keepanno; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isAbsent; |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.keepanno.annotations.KeepTarget; |
| import com.android.tools.r8.keepanno.annotations.UsesReflection; |
| import com.android.tools.r8.utils.AndroidApiLevel; |
| import com.android.tools.r8.utils.StringUtils; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| import com.google.common.collect.ImmutableList; |
| import java.util.List; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class KeepUsesReflectionAnnotationTest extends TestBase { |
| |
| static final String EXPECTED = StringUtils.lines("Hello, world"); |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withDefaultRuntimes().withApiLevel(AndroidApiLevel.B).build(); |
| } |
| |
| public KeepUsesReflectionAnnotationTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testReference() throws Exception { |
| testForRuntime(parameters) |
| .addProgramClasses(getInputClasses()) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED); |
| } |
| |
| @Test |
| public void testWithRuleExtraction() throws Exception { |
| testForR8(parameters.getBackend()) |
| .enableExperimentalKeepAnnotations() |
| .addProgramClasses(getInputClasses()) |
| .addKeepMainRule(TestClass.class) |
| .setMinApi(parameters) |
| .allowUnusedProguardConfigurationRules() |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED) |
| .inspect(this::checkOutput); |
| } |
| |
| public List<Class<?>> getInputClasses() { |
| return ImmutableList.of(TestClass.class, A.class, B.class, C.class); |
| } |
| |
| private void checkOutput(CodeInspector inspector) { |
| assertThat(inspector.clazz(A.class), isPresent()); |
| assertThat(inspector.clazz(B.class), isPresent()); |
| assertThat(inspector.clazz(C.class), isAbsent()); |
| assertThat(inspector.clazz(B.class).method("void", "bar"), isPresent()); |
| assertThat(inspector.clazz(B.class).method("void", "bar", "int"), isAbsent()); |
| } |
| |
| static class A { |
| |
| @UsesReflection({ |
| // Ensure that the class A remains as we are assuming the contents of its name. |
| @KeepTarget(classConstant = A.class), |
| // Ensure that the class B remains as we are looking it up by reflected name. |
| @KeepTarget(classConstant = B.class), |
| // Ensure the method 'bar' remains as we are invoking it by reflected name. |
| @KeepTarget( |
| classConstant = B.class, |
| methodName = "bar", |
| methodParameters = {}, |
| methodReturnType = "void") |
| }) |
| public void foo() throws Exception { |
| Class<?> clazz = Class.forName(A.class.getTypeName().replace("$A", "$B")); |
| clazz.getDeclaredMethod("bar").invoke(clazz); |
| } |
| |
| // This annotation is not active as its implicit precondition "void A.foo(int)" is not used. |
| @UsesReflection({@KeepTarget(classConstant = C.class)}) |
| public void foo(int unused) { |
| // Unused. |
| } |
| } |
| |
| static class B { |
| public static void bar() { |
| System.out.println("Hello, world"); |
| } |
| |
| public static void bar(int ignore) { |
| throw new RuntimeException("UNUSED"); |
| } |
| } |
| |
| static class C { |
| // Unused. |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) throws Exception { |
| new A().foo(); |
| } |
| } |
| } |