1 /*
2 * Copyright (c) 2013, 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 * @test
26 * @bug 8010927
27 * @summary Kitchensink crashed with SIGSEGV, Problematic frame: v ~StubRoutines::checkcast_arraycopy
28 * @library /test/lib /testlibrary
29 * @modules java.base/jdk.internal.misc
30 * @build compiler.runtime.Test8010927
31 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
32 * sun.hotspot.WhiteBox$WhiteBoxPermission
33 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions
34 * -XX:+WhiteBoxAPI -Xbootclasspath/a:. -Xmx64m -XX:NewSize=20971520
35 * -XX:MaxNewSize=32m -XX:-UseTLAB -XX:-UseAdaptiveSizePolicy
36 * compiler.runtime.Test8010927
37 */
38
39 package compiler.runtime;
40
41 import jdk.internal.misc.Unsafe;
42 import sun.hotspot.WhiteBox;
43
44 import java.lang.reflect.Field;
45
46 /**
47 * The test creates uncommitted space between oldgen and young gen
48 * by specifying MaxNewSize bigger than NewSize.
49 * NewSize = 20971520 = (512*4K) * 10 for 4k pages
50 * Then it tries to execute arraycopy() with elements type check
51 * to the array at the end of survive space near unused space.
52 */
53
54 public class Test8010927 {
55
56 private static final Unsafe U;
57
58 static {
59 try {
60 Field unsafe = Unsafe.class.getDeclaredField("theUnsafe");
61 unsafe.setAccessible(true);
62 U = (Unsafe) unsafe.get(null);
63 } catch (Exception e) {
64 throw new Error(e);
65 }
66 }
67
68 public static Object[] o;
69
70 public static final boolean debug = Boolean.getBoolean("debug");
71
72 // 2 different obect arrays but same element types
73 static Test8010927[] masterA;
74 static Object[] masterB;
75 static final Test8010927 elem = new Test8010927();
76 static final WhiteBox wb = WhiteBox.getWhiteBox();
77
78 static final int obj_header_size = U.ARRAY_OBJECT_BASE_OFFSET;
79 static final int heap_oop_size = wb.getHeapOopSize();
80 static final int card_size = 512;
81 static final int one_card = (card_size - obj_header_size) / heap_oop_size;
82
83 static final int surv_size = 2112 * 1024;
84
85 // The size is big to not fit into survive space.
86 static final Object[] cache = new Object[(surv_size / card_size)];
87
88 public static void main(String[] args) {
89 masterA = new Test8010927[one_card];
90 masterB = new Object[one_card];
91 for (int i = 0; i < one_card; ++i) {
92 masterA[i] = elem;
93 masterB[i] = elem;
94 }
95
96 // Move cache[] to the old gen.
97 long low_limit = wb.getObjectAddress(cache);
98 System.gc();
99 // Move 'cache' to oldgen.
100 long upper_limit = wb.getObjectAddress(cache);
101 if ((low_limit - upper_limit) > 0) { // substaction works with unsigned values
102 // OldGen is placed before youngger for ParallelOldGC.
103 upper_limit = low_limit + 21000000l; // +20971520
104 }
105 // Each A[one_card] size is 512 bytes,
106 // it will take about 40000 allocations to trigger GC.
107 // cache[] has 8192 elements so GC should happen
108 // each 5th iteration.
109 for (long l = 0; l < 20; l++) {
110 fill_heap();
111 if (debug) {
112 System.out.println("test oop_disjoint_arraycopy");
113 }
114 testA_arraycopy();
115 if (debug) {
116 System.out.println("test checkcast_arraycopy");
117 }
118 testB_arraycopy();
119 // Execute arraycopy to the topmost array in young gen
120 if (debug) {
121 int top_index = get_top_address(low_limit, upper_limit);
122 if (top_index >= 0) {
123 long addr = wb.getObjectAddress(cache[top_index]);
124 System.out.println("top_addr: 0x" + Long.toHexString(addr) + ", 0x" + Long.toHexString(addr + 512));
125 }
126 }
127 }
128 }
129
130 static void fill_heap() {
131 for (int i = 0; i < cache.length; ++i) {
132 o = new Test8010927[one_card];
133 System.arraycopy(masterA, 0, o, 0, masterA.length);
134 cache[i] = o;
135 }
136 for (long j = 0; j < 256; ++j) {
137 o = new Long[10000]; // to trigger GC
138 }
139 }
140
141 static void testA_arraycopy() {
142 for (int i = 0; i < cache.length; ++i) {
143 System.arraycopy(masterA, 0, cache[i], 0, masterA.length);
144 }
145 }
146
147 static void testB_arraycopy() {
148 for (int i = 0; i < cache.length; ++i) {
149 System.arraycopy(masterB, 0, cache[i], 0, masterB.length);
150 }
151 }
152
153 static int get_top_address(long min, long max) {
154 int index = -1;
155 long addr = min;
156 for (int i = 0; i < cache.length; ++i) {
157 long test = wb.getObjectAddress(cache[i]);
158 if (((test - addr) > 0) && ((max - test) > 0)) { // substaction works with unsigned values
159 addr = test;
160 index = i;
161 }
162 }
163 return index;
164 }
165 }