| // Copyright (c) 2020, 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.classmerging.vertical; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.CoreMatchers.not; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertEquals; |
| |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| import com.android.tools.r8.utils.codeinspector.MethodSubject; |
| import com.android.tools.r8.utils.codeinspector.VerticallyMergedClassesInspector; |
| import java.util.stream.IntStream; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| import org.junit.runners.Parameterized.Parameters; |
| |
| // If an exception class A is merged into another exception class B, then all exception tables |
| // should be updated, and class A should be removed entirely. |
| @RunWith(Parameterized.class) |
| public class ExceptionTablesTest extends VerticalClassMergerTestBase { |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return TestBase.getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public ExceptionTablesTest(TestParameters parameters) { |
| super(parameters); |
| } |
| |
| @Test |
| public void testClassesHaveBeenMerged() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(ExceptionTablesTest.class) |
| .addKeepMainRule(TestClass.class) |
| .addVerticallyMergedClassesInspector(this::inspectVerticallyMergedClasses) |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect(this::inspect) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccess(); |
| } |
| |
| private void inspectVerticallyMergedClasses(VerticallyMergedClassesInspector inspector) { |
| inspector.assertMergedIntoSubtype(ExceptionA.class, Exception1.class); |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| assertThat(inspector.clazz(TestClass.class), isPresent()); |
| assertThat(inspector.clazz(ExceptionB.class), isPresent()); |
| assertThat(inspector.clazz(Exception2.class), isPresent()); |
| assertThat(inspector.clazz(ExceptionA.class), not(isPresent())); |
| assertThat(inspector.clazz(Exception1.class), not(isPresent())); |
| |
| // Check that the second catch handler has been removed. |
| MethodSubject mainMethodSubject = inspector.clazz(TestClass.class).mainMethod(); |
| assertThat(mainMethodSubject, isPresent()); |
| assertEquals( |
| 2, |
| mainMethodSubject |
| .streamTryCatches() |
| .flatMapToInt(x -> IntStream.of(x.getNumberOfHandlers())) |
| .sum()); |
| } |
| |
| public static class TestClass { |
| |
| public static void main(String[] args) { |
| // The following will lead to a catch handler for ExceptionA, which is merged into ExceptionB. |
| try { |
| doSomethingThatMightThrowExceptionB(); |
| doSomethingThatMightThrowException2(); |
| } catch (ExceptionB exception) { |
| System.out.println("Caught exception: " + exception.getMessage()); |
| } catch (ExceptionA exception) { |
| System.out.println("Caught exception: " + exception.getMessage()); |
| } catch (Exception2 exception) { |
| System.out.println("Caught exception: " + exception.getMessage()); |
| } catch (Exception1 exception) { |
| System.out.println("Caught exception: " + exception.getMessage()); |
| } |
| } |
| |
| private static void doSomethingThatMightThrowExceptionB() throws ExceptionB { |
| throw new ExceptionB("Ouch!"); |
| } |
| |
| private static void doSomethingThatMightThrowException2() throws Exception2 { |
| throw new Exception2("Ouch!"); |
| } |
| } |
| |
| // Will be merged into ExceptionB when class merging is enabled. |
| public static class ExceptionA extends Exception { |
| public ExceptionA(String message) { |
| super(message); |
| } |
| } |
| |
| public static class ExceptionB extends ExceptionA { |
| public ExceptionB(String message) { |
| super(message); |
| } |
| } |
| |
| public static class Exception1 extends Exception { |
| public Exception1(String message) { |
| super(message); |
| } |
| } |
| |
| public static class Exception2 extends Exception1 { |
| public Exception2(String message) { |
| super(message); |
| } |
| } |
| } |