1 /*

     2  * Copyright (c) 2018, 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 8194246

    27  * @summary JVM crashes on stack trace for large number of methods.

    28  * @library /test/lib

    29  * @modules java.base/jdk.internal.org.objectweb.asm

    30  *          java.base/jdk.internal.misc

    31  * @compile LargeClassTest.java

    32  * @run main LargeClassTest

    33  */

    34 

    35 import java.io.File;

    36 import java.io.FileOutputStream;

    37 import jdk.internal.org.objectweb.asm.ClassWriter;

    38 import jdk.internal.org.objectweb.asm.MethodVisitor;

    39 import jdk.internal.org.objectweb.asm.FieldVisitor;

    40 import jdk.internal.org.objectweb.asm.Label;

    41 import jdk.internal.org.objectweb.asm.AnnotationVisitor;

    42 import jdk.internal.org.objectweb.asm.Opcodes;

    43 import jdk.test.lib.process.ProcessTools;

    44 import jdk.test.lib.process.OutputAnalyzer;

    45 

    46 public class LargeClassTest implements Opcodes {

    47     public static void main(String... args) throws Exception {

    48         writeClassFile();

    49         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-cp", ".",  "Large");

    50         OutputAnalyzer output = new OutputAnalyzer(pb.start());

    51         output.shouldHaveExitValue(0);

    52     }

    53 

    54     // Writes a Large class with > signed 16 bit int methods

    55     public static void writeClassFile() throws Exception {

    56 

    57         ClassWriter cw = new ClassWriter(0);

    58         FieldVisitor fv;

    59         MethodVisitor mv;

    60         AnnotationVisitor av0;

    61 

    62         cw.visit(55, ACC_PUBLIC + ACC_SUPER, "Large", null, "java/lang/Object", null);

    63 

    64         {

    65           mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);

    66           mv.visitCode();

    67           mv.visitVarInsn(ALOAD, 0);

    68           mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);

    69           mv.visitInsn(RETURN);

    70           mv.visitMaxs(1, 1);

    71           mv.visitEnd();

    72         }

    73         {

    74           // public static void main(String[] args) {

    75           //     Large large = new Large();

    76           //     large.f_1(55);

    77           // }

    78           mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);

    79           mv.visitCode();

    80           mv.visitTypeInsn(NEW, "Large");

    81           mv.visitInsn(DUP);

    82           mv.visitMethodInsn(INVOKESPECIAL, "Large", "<init>", "()V", false);

    83           mv.visitVarInsn(ASTORE, 1);

    84           mv.visitVarInsn(ALOAD, 1);

    85           mv.visitIntInsn(BIPUSH, 55);

    86           mv.visitMethodInsn(INVOKEVIRTUAL, "Large", "f_1", "(I)I", false);

    87           mv.visitInsn(POP);

    88           mv.visitInsn(RETURN);

    89           mv.visitMaxs(2, 2);

    90           mv.visitEnd();

    91         }

    92 

    93         // Write 33560 methods called f_$i

    94         for (int i = 1000; i < 34560; i++)

    95         {

    96           mv = cw.visitMethod(ACC_PUBLIC, "f_" + i, "()V", null, null);

    97           mv.visitCode();

    98           mv.visitInsn(RETURN);

    99           mv.visitMaxs(0, 1);

   100           mv.visitEnd();

   101         }

   102         {

   103           // public int f_1(int prior) {

   104           //   int total = prior + new java.util.Random(1).nextInt();

   105           //   return total + f_2(total);

   106           // }

   107           mv = cw.visitMethod(ACC_PUBLIC, "f_1", "(I)I", null, null);

   108           mv.visitCode();

   109           mv.visitVarInsn(ILOAD, 1);

   110           mv.visitTypeInsn(NEW, "java/util/Random");

   111           mv.visitInsn(DUP);

   112           mv.visitInsn(LCONST_1);

   113           mv.visitMethodInsn(INVOKESPECIAL, "java/util/Random", "<init>", "(J)V", false);

   114           mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Random", "nextInt", "()I", false);

   115           mv.visitInsn(IADD);

   116           mv.visitVarInsn(ISTORE, 2);

   117           mv.visitVarInsn(ILOAD, 2);

   118           mv.visitVarInsn(ALOAD, 0);

   119           mv.visitVarInsn(ILOAD, 2);

   120           mv.visitMethodInsn(INVOKEVIRTUAL, "Large", "f_2", "(I)I", false);

   121           mv.visitInsn(IADD);

   122           mv.visitInsn(IRETURN);

   123           mv.visitMaxs(5, 3);

   124           mv.visitEnd();

   125         }

   126         {

   127           // public int f_2(int total) {

   128           //   System.out.println(java.util.Arrays.toString(Thread.currentThread().getStackTrace()));

   129           //   return 10;

   130           // }

   131           mv = cw.visitMethod(ACC_PUBLIC, "f_2", "(I)I", null, null);

   132           mv.visitCode();

   133           mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");

   134           mv.visitMethodInsn(INVOKESTATIC, "java/lang/Thread", "currentThread", "()Ljava/lang/Thread;", false);

   135           mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Thread", "getStackTrace", "()[Ljava/lang/StackTraceElement;", false);

   136           mv.visitMethodInsn(INVOKESTATIC, "java/util/Arrays", "toString", "([Ljava/lang/Object;)Ljava/lang/String;", false);

   137           mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);

   138           mv.visitIntInsn(BIPUSH, 10);

   139           mv.visitInsn(IRETURN);

   140           mv.visitMaxs(2, 2);

   141           mv.visitEnd();

   142         }

   143         cw.visitEnd();

   144 

   145         try (FileOutputStream fos = new FileOutputStream(new File("Large.class"))) {

   146           fos.write(cw.toByteArray());

   147         }

   148     }

   149 }