1 /*
2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 /*
26 * @test AllocationCodeBlobTest
27 * @summary testing of WB::allocate/freeCodeBlob()
28 * @bug 8059624 8064669
29 * @library /testlibrary /test/lib /
30 * @modules java.base/jdk.internal.misc
31 * java.management
32 * @build compiler.whitebox.AllocationCodeBlobTest
33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
34 * sun.hotspot.WhiteBox$WhiteBoxPermission
35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
36 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
37 * -XX:-SegmentedCodeCache
38 * compiler.whitebox.AllocationCodeBlobTest
39 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
40 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
41 * -XX:+SegmentedCodeCache
42 * compiler.whitebox.AllocationCodeBlobTest
43 */
44
45 package compiler.whitebox;
46
47 import jdk.test.lib.Asserts;
48 import jdk.test.lib.InfiniteLoop;
49 import sun.hotspot.WhiteBox;
50 import sun.hotspot.code.BlobType;
51
52 import java.lang.management.MemoryPoolMXBean;
53 import java.util.ArrayList;
54 import java.util.EnumSet;
55
56 public class AllocationCodeBlobTest {
57 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
58 private static final long CODE_CACHE_SIZE
59 = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize");
60 private static final int SIZE = 1;
61
62 public static void main(String[] args) {
63 // check that Sweeper handels dummy blobs correctly
64 Thread t = new Thread(
65 new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L),
66 "ForcedSweeper");
67 t.setDaemon(true);
68 System.out.println("Starting " + t.getName());
69 t.start();
70
71 EnumSet<BlobType> blobTypes = BlobType.getAvailable();
72 for (BlobType type : blobTypes) {
73 new AllocationCodeBlobTest(type).test();
74 }
75
76 // check that deoptimization works well w/ dummy blobs
77 t = new Thread(
78 new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L),
79 "Deoptimize Thread");
80 t.setDaemon(true);
81 System.out.println("Starting " + t.getName());
82 t.start();
83
84 for (int i = 0; i < 10_000; ++i) {
85 for (BlobType type : blobTypes) {
86 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
87 }
88 }
89
90 }
91
92 private final BlobType type;
93 private final MemoryPoolMXBean bean;
94 private AllocationCodeBlobTest(BlobType type) {
95 this.type = type;
96 bean = type.getMemoryPool();
97 }
98
99 private void test() {
100 System.out.printf("type %s%n", type);
101
102 // Measure the code cache usage after allocate/free.
103 long start = getUsage();
104 long addr1 = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
105 long firstAllocation = getUsage();
106 WHITE_BOX.freeCodeBlob(addr1);
107 long firstFree = getUsage();
108 long addr2 = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
109 long secondAllocation = getUsage();
110 WHITE_BOX.freeCodeBlob(addr2);
111
112 // The following code may trigger resolving of invokedynamic
113 // instructions and therefore method handle intrinsic creation
114 // in the code cache. Make sure this is executed after measuring
115 // the code cache usage.
116 Asserts.assertNE(0, addr1, "first allocation failed");
117 Asserts.assertNE(0, addr2, "second allocation failed");
118 Asserts.assertLTE(start + SIZE, firstAllocation,
119 "allocation should increase memory usage: "
120 + start + " + " + SIZE + " <= " + firstAllocation);
121 Asserts.assertLTE(firstFree, firstAllocation,
122 "free shouldn't increase memory usage: "
123 + firstFree + " <= " + firstAllocation);
124 Asserts.assertEQ(firstAllocation, secondAllocation);
125
126 System.out.println("allocating till possible...");
127 ArrayList<Long> blobs = new ArrayList<>();
128 int size = (int) (CODE_CACHE_SIZE >> 7);
129 while ((addr1 = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) {
130 blobs.add(addr1);
131 }
132 for (Long blob : blobs) {
133 WHITE_BOX.freeCodeBlob(blob);
134 }
135 }
136
137 private long getUsage() {
138 return bean.getUsage().getUsed();
139 }
140 }