| // Copyright (c) 2023, 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.keepanno.annotations.AnnotationPattern; |
| import com.android.tools.r8.keepanno.annotations.KeepCondition; |
| import com.android.tools.r8.keepanno.annotations.KeepItemKind; |
| import com.android.tools.r8.keepanno.annotations.UsedByNative; |
| 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.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.reflect.Method; |
| import java.util.List; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| import org.junit.runners.Parameterized.Parameter; |
| |
| @RunWith(Parameterized.class) |
| public class KeepUsedByNativeAnnotationTest extends KeepAnnoTestBase { |
| |
| static final String EXPECTED = StringUtils.lines("@Anno.value = anno-on-bar", "Hello, world"); |
| |
| @Parameter public KeepAnnoParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static List<KeepAnnoParameters> data() { |
| return createParameters( |
| getTestParameters().withDefaultRuntimes().withApiLevel(AndroidApiLevel.B).build()); |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForKeepAnno(parameters) |
| .addProgramClasses(getInputClasses()) |
| .addKeepMainRule(TestClass.class) |
| .setExcludedOuterClass(getClass()) |
| .run(TestClass.class) |
| .assertSuccessWithOutput(EXPECTED) |
| .applyIf(parameters.isShrinker(), r -> r.inspect(this::checkOutput)); |
| } |
| |
| public List<Class<?>> getInputClasses() { |
| return ImmutableList.of(TestClass.class, Anno.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(A.class).method("void", "bar"), isPresent()); |
| assertThat(inspector.clazz(B.class).method("void", "bar"), isPresent()); |
| assertThat(inspector.clazz(B.class).method("void", "bar", "int"), isAbsent()); |
| } |
| |
| @Retention(RetentionPolicy.RUNTIME) |
| private @interface Anno { |
| String value(); |
| } |
| |
| @UsedByNative( |
| description = "Ensure that the class A remains as we are assuming the contents of its name.", |
| preconditions = {@KeepCondition(classConstant = A.class, methodName = "foo")}, |
| // The kind will default to ONLY_CLASS, so setting this to include members will keep the |
| // otherwise unused bar method. |
| kind = KeepItemKind.CLASS_AND_MEMBERS) |
| static class A { |
| |
| public void foo() throws Exception { |
| Class<?> clazz = Class.forName(A.class.getTypeName().replace("$A", "$B")); |
| Method bar = clazz.getDeclaredMethod("bar"); |
| Anno annotation = bar.getAnnotation(Anno.class); |
| System.out.println("@Anno.value = " + annotation.value()); |
| bar.invoke(clazz); |
| } |
| |
| public void bar() { |
| // Unused but kept by the annotation. |
| } |
| } |
| |
| static class B { |
| |
| @UsedByNative( |
| // Only if A.foo is live do we need to keep this. |
| preconditions = {@KeepCondition(classConstant = A.class, methodName = "foo")}, |
| // Both the class and method are reflectively accessed. |
| kind = KeepItemKind.CLASS_AND_MEMBERS, |
| constrainAnnotations = @AnnotationPattern(constant = Anno.class)) |
| @Anno("anno-on-bar") |
| 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(); |
| } |
| } |
| } |