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// Copyright (c) 2019, 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.memberrebinding;
import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
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.memberrebinding.testclasses.IllegalFieldRebindingTestClasses;
import com.android.tools.r8.memberrebinding.testclasses.IllegalFieldRebindingTestClasses.B;
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.InstructionSubject;
import com.android.tools.r8.utils.codeinspector.MethodSubject;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;
@RunWith(Parameterized.class)
public class IllegalFieldRebindingTest extends TestBase {
private static final String EXPECTED_OUTPUT = StringUtils.lines("42");
private static final String OTHER_EXPECTED_OUTPUT = StringUtils.lines("0");
@Parameter(0)
public TestParameters parameters;
@Parameters(name = "{0}")
public static TestParametersCollection data() {
return getTestParameters().withAllRuntimesAndApiLevels().build();
}
@Test
public void testJvm() throws Exception {
parameters.assumeJvmTestParameters();
testForJvm(parameters)
.addTestClasspath()
.run(parameters.getRuntime(), TestClass.class)
.assertSuccessWithOutput(EXPECTED_OUTPUT);
}
@Test
public void test() throws Exception {
CodeInspector inspector =
testForR8(parameters.getBackend())
.addInnerClasses(IllegalFieldRebindingTest.class)
.addInnerClasses(IllegalFieldRebindingTestClasses.class)
.addKeepMainRule(TestClass.class)
.enableNoAccessModificationAnnotationsForClasses()
.enableNoVerticalClassMergingAnnotations()
.setMinApi(parameters)
.run(parameters.getRuntime(), TestClass.class)
.assertSuccessWithOutput(EXPECTED_OUTPUT)
.inspector();
ClassSubject classSubject = inspector.clazz(TestClass.class);
assertThat(classSubject, isPresent());
MethodSubject methodSubject = classSubject.mainMethod();
assertThat(methodSubject, isPresent());
// Verify that the static-put instruction has not been removed.
assertEquals(
1, methodSubject.streamInstructions().filter(InstructionSubject::isStaticPut).count());
}
@Test
public void testJvmOther() throws Exception {
parameters.assumeJvmTestParameters();
testForJvm(parameters)
.addTestClasspath()
.run(parameters.getRuntime(), OtherTestClass.class)
.assertSuccessWithOutput(OTHER_EXPECTED_OUTPUT);
}
@Test
public void otherTest() throws Exception {
CodeInspector inspector =
testForR8(parameters.getBackend())
.addInnerClasses(IllegalFieldRebindingTest.class)
.addInnerClasses(IllegalFieldRebindingTestClasses.class)
.addKeepMainRule(OtherTestClass.class)
.enableNoAccessModificationAnnotationsForClasses()
.enableNoVerticalClassMergingAnnotations()
.setMinApi(parameters)
.run(parameters.getRuntime(), OtherTestClass.class)
.assertSuccessWithOutput(OTHER_EXPECTED_OUTPUT)
.inspector();
// The static-get instruction in OtherTestClass.main() should have been replaced by the
// constant 0, which makes the remaining classes unreachable.
assertEquals(1, inspector.allClasses().size());
ClassSubject classSubject = inspector.clazz(OtherTestClass.class);
assertThat(classSubject, isPresent());
MethodSubject methodSubject = classSubject.mainMethod();
assertThat(methodSubject, isPresent());
// Verify that a constant 0 is being loaded in main().
assertEquals(
1,
methodSubject
.streamInstructions()
.filter(instruction -> instruction.isConstNumber(0))
.count());
}
static class TestClass {
public static void main(String[] args) {
// Cannot be member rebound because A is inaccessible to this package. However, the
// instruction cannot be removed as the field `A.f` is actually read.
B.f = 42;
B.print();
}
}
static class OtherTestClass {
public static void main(String[] args) {
// Cannot be member rebound because A is inaccessible to this package.
// However, the instruction should still be replaced by the constant 0.
System.out.println(B.f);
}
}
}