| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| import java.lang.management.MemoryPoolMXBean; |
| import java.util.EnumSet; |
| import java.util.ArrayList; |
| |
| import sun.hotspot.WhiteBox; |
| import sun.hotspot.code.BlobType; |
| import com.oracle.java.testlibrary.Asserts; |
| |
| /* |
| * @test AllocationCodeBlobTest |
| * @bug 8059624 |
| * @library /testlibrary /testlibrary/whitebox |
| * @build AllocationCodeBlobTest |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* |
| * -XX:-SegmentedCodeCache AllocationCodeBlobTest |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* |
| * -XX:+SegmentedCodeCache AllocationCodeBlobTest |
| * @summary testing of WB::allocate/freeCodeBlob() |
| */ |
| public class AllocationCodeBlobTest { |
| private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); |
| private static final long CODE_CACHE_SIZE |
| = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); |
| private static final int SIZE = 1; |
| |
| public static void main(String[] args) { |
| // check that Sweeper handels dummy blobs correctly |
| new ForcedSweeper(500).start(); |
| EnumSet<BlobType> blobTypes = BlobType.getAvailable(); |
| for (BlobType type : blobTypes) { |
| new AllocationCodeBlobTest(type).test(); |
| } |
| } |
| |
| private final BlobType type; |
| private final MemoryPoolMXBean bean; |
| private AllocationCodeBlobTest(BlobType type) { |
| this.type = type; |
| bean = type.getMemoryPool(); |
| } |
| |
| private void test() { |
| System.out.printf("type %s%n", type); |
| long start = getUsage(); |
| long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); |
| Asserts.assertNE(0, addr, "allocation failed"); |
| |
| long firstAllocation = getUsage(); |
| Asserts.assertLTE(start + SIZE, firstAllocation, |
| "allocation should increase memory usage: " |
| + start + " + " + SIZE + " <= " + firstAllocation); |
| |
| WHITE_BOX.freeCodeBlob(addr); |
| long firstFree = getUsage(); |
| Asserts.assertLTE(firstFree, firstAllocation, |
| "free shouldn't increase memory usage: " |
| + firstFree + " <= " + firstAllocation); |
| |
| addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); |
| Asserts.assertNE(0, addr, "allocation failed"); |
| |
| long secondAllocation = getUsage(); |
| Asserts.assertEQ(firstAllocation, secondAllocation); |
| |
| WHITE_BOX.freeCodeBlob(addr); |
| System.out.println("allocating till possible..."); |
| ArrayList<Long> blobs = new ArrayList<>(); |
| int size = (int) (CODE_CACHE_SIZE >> 7); |
| while ((addr = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) { |
| blobs.add(addr); |
| } |
| for (Long blob : blobs) { |
| WHITE_BOX.freeCodeBlob(blob); |
| } |
| } |
| |
| private long getUsage() { |
| return bean.getUsage().getUsed(); |
| } |
| |
| private static class ForcedSweeper extends Thread { |
| private final int millis; |
| public ForcedSweeper(int millis) { |
| super("ForcedSweeper"); |
| setDaemon(true); |
| this.millis = millis; |
| } |
| public void run() { |
| try { |
| while (true) { |
| WHITE_BOX.forceNMethodSweep(); |
| Thread.sleep(millis); |
| } |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new Error(e); |
| } |
| } |
| } |
| } |