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 package jdk.vm.ci.hotspot;
  24 
  25 import static java.lang.String.*;
  26 
  27 import java.io.*;
  28 import java.lang.reflect.*;
  29 import java.util.*;
  30 
  31 import jdk.internal.org.objectweb.asm.*;










  32 import jdk.internal.org.objectweb.asm.Type;
  33 import jdk.vm.ci.common.*;
  34 import sun.misc.*;
  35 
  36 /**
  37  * A {@link ClassVisitor} that verifies {@link HotSpotVMConfig} does not access {@link Unsafe} from
  38  * any of its non-static, non-constructor methods. This ensures that a deserialized
  39  * {@link HotSpotVMConfig} object does not perform any unsafe reads on addresses that are only valid
  40  * in the context in which the object was serialized. Note that this does not catch cases where a
  41  * client uses an address stored in a {@link HotSpotVMConfig} field.
  42  */
  43 final class HotSpotVMConfigVerifier extends ClassVisitor {
  44 
  45     public static boolean check() {
  46         Class<?> cls = HotSpotVMConfig.class;
  47         String classFilePath = "/" + cls.getName().replace('.', '/') + ".class";
  48         try {
  49             InputStream classfile = cls.getResourceAsStream(classFilePath);
  50             ClassReader cr = new ClassReader(Objects.requireNonNull(classfile, "Could not find class file for " + cls.getName()));
  51             ClassVisitor cv = new HotSpotVMConfigVerifier();
  52             cr.accept(cv, 0);
  53             return true;
  54         } catch (IOException e) {

   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 package jdk.vm.ci.hotspot;
  24 
  25 import static java.lang.String.format;
  26 
  27 import java.io.IOException;
  28 import java.io.InputStream;
  29 import java.lang.reflect.Constructor;
  30 import java.lang.reflect.Executable;
  31 import java.lang.reflect.Method;
  32 import java.lang.reflect.Modifier;
  33 import java.util.Arrays;
  34 import java.util.Objects;
  35 
  36 import jdk.vm.ci.common.JVMCIError;
  37 import jdk.internal.org.objectweb.asm.ClassReader;
  38 import jdk.internal.org.objectweb.asm.ClassVisitor;
  39 import jdk.internal.org.objectweb.asm.Label;
  40 import jdk.internal.org.objectweb.asm.MethodVisitor;
  41 import jdk.internal.org.objectweb.asm.Opcodes;
  42 import jdk.internal.org.objectweb.asm.Type;
  43 import sun.misc.Unsafe;

  44 
  45 /**
  46  * A {@link ClassVisitor} that verifies {@link HotSpotVMConfig} does not access {@link Unsafe} from
  47  * any of its non-static, non-constructor methods. This ensures that a deserialized
  48  * {@link HotSpotVMConfig} object does not perform any unsafe reads on addresses that are only valid
  49  * in the context in which the object was serialized. Note that this does not catch cases where a
  50  * client uses an address stored in a {@link HotSpotVMConfig} field.
  51  */
  52 final class HotSpotVMConfigVerifier extends ClassVisitor {
  53 
  54     public static boolean check() {
  55         Class<?> cls = HotSpotVMConfig.class;
  56         String classFilePath = "/" + cls.getName().replace('.', '/') + ".class";
  57         try {
  58             InputStream classfile = cls.getResourceAsStream(classFilePath);
  59             ClassReader cr = new ClassReader(Objects.requireNonNull(classfile, "Could not find class file for " + cls.getName()));
  60             ClassVisitor cv = new HotSpotVMConfigVerifier();
  61             cr.accept(cv, 0);
  62             return true;
  63         } catch (IOException e) {