1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import dalvik.annotation.optimization.DeadReferenceSafe; 18 import java.util.concurrent.atomic.AtomicInteger; 19 20 @DeadReferenceSafe 21 public final class DeadReferenceSafeTest { 22 static AtomicInteger nFinalized = new AtomicInteger(0); 23 private static final int INNER_ITERS = 10; 24 static int count; 25 static boolean interpreted; 26 int n = 1; 27 28 private static void $noinline$loop() { 29 DeadReferenceSafeTest x; 30 // The loop allocates INNER_ITERS DeadReferenceSafeTest objects. 31 for (int i = 0; i < INNER_ITERS; ++i) { 32 // We've allocated i objects so far. 33 x = new DeadReferenceSafeTest(); 34 count += x.n; 35 // x is dead here. 36 if (i == 5) { 37 // With dead reference elimination, all 6 objects should have been finalized here. 38 // However the interpreter doesn't (yet?) play by the proper rules. 39 Main.$noinline$gcAndCheck(nFinalized, (interpreted ? 5 : 6), "DeadReferenceSafe", 40 "Failed to reclaim dead reference in @DeadReferenceSafe code!"); 41 } 42 } 43 } 44 45 private static void reset(int expected_count) { 46 Runtime.getRuntime().gc(); 47 System.runFinalization(); 48 if (nFinalized.get() != expected_count) { 49 System.out.println("DeadReferenceSafeTest: Wrong number of finalized objects:" 50 + nFinalized.get()); 51 } 52 nFinalized.set(0); 53 } 54 55 protected void finalize() { 56 nFinalized.incrementAndGet(); 57 } 58 59 public static void runTest() { 60 try { 61 interpreted = !Main.ensureCompiled(DeadReferenceSafeTest.class, "$noinline$loop"); 62 } catch (NoSuchMethodException e) { 63 System.out.println("Unexpectedly threw " + e); 64 } 65 66 $noinline$loop(); 67 68 if (count != INNER_ITERS) { 69 System.out.println("DeadReferenceSafeTest: Final count wrong: " + count); 70 } 71 reset(INNER_ITERS); 72 } 73 } 74
