| // 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.ir.optimize.membervaluepropagation; |
| |
| import com.android.tools.r8.NeverInline; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class EscapeBeforeStaticPutTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public EscapeBeforeStaticPutTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(EscapeBeforeStaticPutTest.class) |
| .addKeepMainRule(TestClass.class) |
| .enableInliningAnnotations() |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("Hello world!"); |
| } |
| |
| static class TestClass { |
| |
| static String greeting; |
| |
| public static void main(String[] args) { |
| greeting = "Hello world!"; |
| if (A.alwaysTrue) { |
| // Unset `greeting` such that the test will not print "Hello world!" if `A.alwaysTrue` has |
| // been propagated. |
| greeting = null; |
| System.out.println(A.greetings[0]); |
| } |
| } |
| } |
| |
| static class A { |
| |
| static boolean alwaysTrue = true; |
| static String[] greetings; |
| |
| static { |
| String[] array = new String[] {null}; |
| for (int i = 0; i < 2; i++) { |
| // Although this instruction is prior to the static-put instruction, it can still leak the |
| // `greetings` array. Hence, this class initializer cannot be postponed, because it may |
| // (and does) rely on the environment. |
| leak(); |
| greetings = array; |
| } |
| } |
| |
| @NeverInline |
| static void leak() { |
| if (greetings != null) { |
| greetings[0] = TestClass.greeting; |
| } |
| } |
| } |
| } |