| // Copyright (c) 2018, 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.ir.optimize.reflection; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static com.android.tools.r8.utils.codeinspector.Matchers.onlyIf; |
| import static org.hamcrest.CoreMatchers.not; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assume.assumeTrue; |
| |
| import com.android.tools.r8.CompilationMode; |
| import com.android.tools.r8.NeverInline; |
| import com.android.tools.r8.NoHorizontalClassMerging; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.utils.ListUtils; |
| import com.android.tools.r8.utils.StringUtils; |
| import com.android.tools.r8.utils.codeinspector.ClassSubject; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| import com.android.tools.r8.utils.codeinspector.MethodSubject; |
| 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 GetClassTest extends ReflectionOptimizerTestBase { |
| |
| static class Base {} |
| |
| static class Sub extends Base {} |
| |
| @NoHorizontalClassMerging |
| static class EffectivelyFinal {} |
| |
| @NoHorizontalClassMerging |
| static class Reflection { |
| |
| public Class<?> call() { |
| return getClass(); |
| } |
| } |
| |
| @NoHorizontalClassMerging |
| static class GetClassTestMain { |
| |
| @NeverInline |
| static Class<?> getMainClass(GetClassTestMain instance) { |
| // Nullable argument. Should not be rewritten to const-class to preserve NPE. |
| return instance.getClass(); |
| } |
| |
| @NeverInline |
| public Class<?> call() { |
| // Non-null `this` pointer. |
| return getClass(); |
| } |
| } |
| |
| static class Main { |
| |
| public static void main(String[] args) { |
| { |
| Base base = new Base(); |
| // Not applicable in debug mode. |
| System.out.println(base.getClass()); |
| // Can be rewritten to const-class always. |
| System.out.println(new Base().getClass()); |
| } |
| |
| { |
| Base sub = new Sub(); |
| // Not applicable in debug mode. |
| System.out.println(sub.getClass()); |
| } |
| |
| { |
| Base[] subs = new Sub[1]; |
| // Not applicable in debug mode. |
| System.out.println(subs.getClass()); |
| } |
| |
| { |
| EffectivelyFinal ef = new EffectivelyFinal(); |
| // Not applicable in debug mode. |
| System.out.println(ef.getClass()); |
| } |
| |
| try { |
| // To not be recognized as un-instantiated class. |
| GetClassTestMain instance = new GetClassTestMain(); |
| System.out.println(instance.call()); |
| System.out.println(GetClassTestMain.getMainClass(instance)); |
| |
| System.out.println(GetClassTestMain.getMainClass(null)); |
| throw new AssertionError("Should preserve NPE."); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| |
| { |
| Reflection r = new Reflection(); |
| // Not applicable in debug mode. |
| System.out.println(r.getClass()); |
| try { |
| // Can be rewritten to const-class after inlining. |
| System.out.println(r.call()); |
| } catch (Throwable e) { |
| throw new AssertionError("Not expected any exceptions."); |
| } |
| } |
| } |
| } |
| |
| private static final String JAVA_OUTPUT = |
| StringUtils.lines( |
| ListUtils.map( |
| ImmutableList.of( |
| Base.class.getTypeName(), |
| Base.class.getTypeName(), |
| Sub.class.getTypeName(), |
| "[L" + Sub.class.getTypeName() + ";", |
| EffectivelyFinal.class.getTypeName(), |
| GetClassTestMain.class.getTypeName(), |
| GetClassTestMain.class.getTypeName(), |
| Reflection.class.getTypeName(), |
| Reflection.class.getTypeName()), |
| l -> "class " + l)); |
| |
| private static final Class<?> MAIN = Main.class; |
| |
| @Parameterized.Parameters(name = "{0}, mode:{1}") |
| public static List<Object[]> data() { |
| return buildParameters( |
| getTestParameters().withAllRuntimesAndApiLevels().build(), CompilationMode.values()); |
| } |
| |
| private final TestParameters parameters; |
| private final CompilationMode mode; |
| |
| public GetClassTest(TestParameters parameters, CompilationMode mode) { |
| this.parameters = parameters; |
| this.mode = mode; |
| } |
| |
| @Test |
| public void testJVM() throws Exception { |
| assumeTrue( |
| "Only run JVM reference on CF runtimes", |
| parameters.isCfRuntime() && mode == CompilationMode.DEBUG); |
| testForJvm(parameters) |
| .addInnerClasses(GetClassTest.class) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(JAVA_OUTPUT); |
| } |
| |
| private void test( |
| CodeInspector codeInspector, |
| boolean expectCallPresent, |
| int expectedGetClassCount, |
| int expectedConstClassCount) { |
| ClassSubject mainClass = codeInspector.clazz(MAIN); |
| MethodSubject mainMethod = mainClass.mainMethod(); |
| assertThat(mainMethod, isPresent()); |
| assertEquals(expectedGetClassCount, countGetClass(mainMethod)); |
| assertEquals(expectedConstClassCount, countConstClass(mainMethod)); |
| |
| ClassSubject reflectionClass = codeInspector.clazz(Reflection.class); |
| assertThat(reflectionClass, isPresent()); |
| assertThat( |
| reflectionClass.uniqueMethodWithOriginalName("call"), |
| onlyIf(expectCallPresent, isPresent())); |
| |
| ClassSubject getterClass = codeInspector.clazz(GetClassTestMain.class); |
| MethodSubject getMainClass = getterClass.uniqueMethodWithOriginalName("getMainClass"); |
| assertThat(getMainClass, isPresent()); |
| // Because of nullable argument, getClass() should remain. |
| assertEquals(1, countGetClass(getMainClass)); |
| assertEquals(0, countConstClass(getMainClass)); |
| |
| MethodSubject call = getterClass.method("java.lang.Class", "call", ImmutableList.of()); |
| if (!expectCallPresent) { |
| assertThat(call, not(isPresent())); |
| } else { |
| assertThat(call, isPresent()); |
| // Because of local, only R8 release mode can rewrite getClass() to const-class. |
| assertEquals(1, countGetClass(call)); |
| assertEquals(0, countConstClass(call)); |
| } |
| } |
| |
| @Test |
| public void testD8() throws Exception { |
| assumeTrue("Only run D8 for Dex backend", parameters.isDexRuntime()); |
| testForD8() |
| .setMode(mode) |
| .addInnerClasses(GetClassTest.class) |
| .setMinApi(parameters) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(JAVA_OUTPUT) |
| .inspect(inspector -> test(inspector, true, 6, 0)); |
| } |
| |
| @Test |
| public void testR8() throws Exception { |
| boolean isRelease = mode == CompilationMode.RELEASE; |
| boolean expectCallPresent = !isRelease; |
| int expectedGetClassCount = isRelease ? 0 : 5; |
| int expectedConstClassCount = isRelease ? (parameters.isCfRuntime() ? 8 : 6) : 1; |
| testForR8(parameters.getBackend()) |
| .setMode(mode) |
| .addInnerClasses(GetClassTest.class) |
| .enableInliningAnnotations() |
| .enableNoHorizontalClassMergingAnnotations() |
| .addKeepMainRule(MAIN) |
| .addDontObfuscate() |
| .setMinApi(parameters) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(JAVA_OUTPUT) |
| .inspect( |
| inspector -> |
| test(inspector, expectCallPresent, expectedGetClassCount, expectedConstClassCount)); |
| } |
| } |