| // 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.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.KeepCondition; |
| 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 KeepUsesReflectionAnnotationWithAdditionalPreconditionTest 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 KeepUsesReflectionAnnotationWithAdditionalPreconditionTest(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) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(EXPECTED) |
| .inspect(this::checkOutput); |
| } |
| |
| public List<Class<?>> getInputClasses() { |
| return ImmutableList.of(TestClass.class, A.class, B.class); |
| } |
| |
| private void checkOutput(CodeInspector inspector) { |
| assertThat(inspector.clazz(B.class), isPresent()); |
| assertThat(inspector.clazz(B.class).uniqueMethodWithOriginalName("<init>"), isPresent()); |
| assertThat(inspector.clazz(B.class).uniqueMethodWithOriginalName("bar"), isPresent()); |
| } |
| |
| static class A { |
| |
| @UsesReflection( |
| value = { |
| // Ensure B's constructor and method 'bar' remain as they are invoked by reflection. |
| @KeepTarget(classConstant = B.class, methodName = "<init>"), |
| @KeepTarget(classConstant = B.class, methodName = "bar") |
| }, |
| additionalPreconditions = { |
| // The reflection depends on the class constant being used in the program in addition to |
| // this method. In rule extraction, this will lead to an over-approximation as the rules |
| // will need to keep the above live if either of the two conditions are met. There is no |
| // way to express the conjunction with multiple distinct precondition classes in the |
| // rule language. With direct annotation interpretation this limitation is avoided and |
| // a more precise shrinking is possible. |
| // TODO(b/248408342): Check this once direct interpretation is supported. |
| @KeepCondition(classConstant = B.class) |
| }) |
| public void foo(Class<B> clazz) throws Exception { |
| if (clazz != null) { |
| clazz.getDeclaredMethod("bar").invoke(clazz.getDeclaredConstructor().newInstance()); |
| } |
| } |
| } |
| |
| static class B { |
| public static void bar() { |
| System.out.println("Hello, world"); |
| } |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) throws Exception { |
| new A().foo(System.nanoTime() > 0 ? B.class : null); |
| } |
| } |
| } |