54 lines
2.0 KiB
Java
54 lines
2.0 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import dalvik.system.VMRuntime;
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public class Main {
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public static void main(String[] args) throws Exception {
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VMRuntime runtime = VMRuntime.getRuntime();
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try {
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int N = 1024 * 1024;
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int S = 512;
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for (int n = 0; n < N; ++n) {
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// Allocate unreachable objects.
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$noinline$Alloc(runtime);
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// Allocate an object with a substantial size to increase memory
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// pressure and eventually trigger non-explicit garbage collection
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// (explicit garbage collections triggered by java.lang.Runtime.gc()
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// are always full GCs). Upon garbage collection, the objects
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// allocated in $noinline$Alloc used to trigger a crash.
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Object[] moving_array = new Object[S];
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}
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} catch (OutOfMemoryError e) {
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// Stop here.
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}
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System.out.println("passed");
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}
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// When using the Concurrent Copying (CC) collector (default collector),
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// this method allocates an object in the non-moving space and an object
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// in the region space, make the former reference the later, and returns
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// nothing (so that none of these objects are reachable when upon return).
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static void $noinline$Alloc(VMRuntime runtime) {
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Object[] non_moving_array = (Object[]) runtime.newNonMovableArray(Object.class, 1);
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// Small object, unlikely to trigger garbage collection.
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non_moving_array[0] = new Object();
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}
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}
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