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To get rid of illegal reflective access.
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168 changes: 168 additions & 0 deletions
168
sslr-core/src/main/java/com/sonar/sslr/impl/typed/Interceptor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| /* | ||
| * SonarSource Language Recognizer | ||
| * Copyright (C) 2010-2019 SonarSource SA | ||
| * mailto:info AT sonarsource DOT com | ||
| * | ||
| * This program is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU Lesser General Public | ||
| * License as published by the Free Software Foundation; either | ||
| * version 3 of the License, or (at your option) any later version. | ||
| * | ||
| * This program 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 | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program; if not, write to the Free Software Foundation, | ||
| * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | ||
| */ | ||
| package com.sonar.sslr.impl.typed; | ||
|
|
||
| import org.objectweb.asm.ClassWriter; | ||
| import org.objectweb.asm.Label; | ||
| import org.objectweb.asm.MethodVisitor; | ||
| import org.objectweb.asm.Opcodes; | ||
| import org.objectweb.asm.Type; | ||
|
|
||
| import java.lang.reflect.Method; | ||
| import java.util.Arrays; | ||
|
|
||
| public class Interceptor { | ||
|
|
||
| private Interceptor() { | ||
| } | ||
|
|
||
| public static Object create( | ||
| Class<?> superClass, | ||
| Class<?>[] constructorParameterTypes, | ||
| Object[] constructorArguments, | ||
| MethodInterceptor interceptor | ||
| ) { | ||
| ClassWriter cv = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES); | ||
| final String className = "GeneratedBySSLR"; | ||
| final String superClassName = Type.getInternalName(superClass); | ||
| cv.visit( | ||
| Opcodes.V1_8, | ||
| Opcodes.ACC_PUBLIC, | ||
| className, | ||
| null, | ||
| superClassName, | ||
| null); | ||
|
|
||
| cv.visitField( | ||
| Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, | ||
| "methodInterceptor", | ||
| Type.getDescriptor(MethodInterceptor.class), | ||
| null, | ||
| null); | ||
|
|
||
| cv.visitField( | ||
| Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, | ||
| "methods", | ||
| Type.getDescriptor(Method[].class), | ||
| null, | ||
| null); | ||
|
|
||
| String constructorDescriptor = Type.getMethodDescriptor( | ||
| Type.getType(void.class), | ||
| Arrays.stream(constructorParameterTypes) | ||
| .map(Type::getType) | ||
| .toArray(Type[]::new)); | ||
| MethodVisitor mv = cv.visitMethod( | ||
| Opcodes.ACC_PUBLIC, | ||
| "<init>", | ||
| constructorDescriptor, | ||
| null, | ||
| null); | ||
| mv.visitVarInsn(Opcodes.ALOAD, 0); | ||
| for (int i = 0; i < constructorParameterTypes.length; i++) { | ||
| mv.visitVarInsn(Type.getType(constructorParameterTypes[i]).getOpcode(Opcodes.ILOAD), 1 + i); | ||
| } | ||
| mv.visitMethodInsn(Opcodes.INVOKESPECIAL, | ||
| superClassName, | ||
| "<init>", | ||
| constructorDescriptor, | ||
| false); | ||
| mv.visitInsn(Opcodes.RETURN); | ||
| mv.visitMaxs(0, 0); | ||
| mv.visitEnd(); | ||
|
|
||
| Method[] methods = superClass.getMethods(); | ||
| for (int methodId = 0; methodId < methods.length; methodId++) { | ||
| Method method = methods[methodId]; | ||
| if (Object.class.equals(method.getDeclaringClass())) { | ||
| continue; | ||
| } | ||
| if (method.getReturnType().isPrimitive()) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| mv = cv.visitMethod( | ||
| Opcodes.ACC_PUBLIC, | ||
| method.getName(), | ||
| Type.getMethodDescriptor(method), | ||
| null, | ||
| null); | ||
|
|
||
| mv.visitFieldInsn(Opcodes.GETSTATIC, | ||
| className, | ||
| "methodInterceptor", | ||
| Type.getDescriptor(MethodInterceptor.class)); | ||
|
|
||
| mv.visitFieldInsn(Opcodes.GETSTATIC, | ||
| className, | ||
| "methods", | ||
| Type.getDescriptor(Method[].class)); | ||
| mv.visitLdcInsn(methodId); | ||
| mv.visitInsn(Opcodes.AALOAD); | ||
|
|
||
| mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, | ||
| Type.getInternalName(MethodInterceptor.class), | ||
| "intercept", | ||
| Type.getMethodDescriptor( | ||
| Type.getType(boolean.class), | ||
| Type.getType(Method.class)), | ||
| true); | ||
| Label label = new Label(); | ||
| mv.visitJumpInsn(Opcodes.IFEQ, label); | ||
| mv.visitInsn(Opcodes.ACONST_NULL); | ||
| mv.visitInsn(Opcodes.ARETURN); | ||
| mv.visitLabel(label); | ||
| mv.visitVarInsn(Opcodes.ALOAD, 0); | ||
| Class<?>[] parameterTypes = method.getParameterTypes(); | ||
| for (int i = 0; i < method.getParameterCount(); i++) { | ||
| mv.visitVarInsn(Type.getType(parameterTypes[i]).getOpcode(Opcodes.ILOAD), 1 + i); | ||
| } | ||
| mv.visitMethodInsn(Opcodes.INVOKESPECIAL, | ||
| superClassName, | ||
| method.getName(), | ||
| Type.getMethodDescriptor(method), | ||
| false); | ||
| mv.visitInsn(Opcodes.ARETURN); | ||
| mv.visitMaxs(0, 0); | ||
| mv.visitEnd(); | ||
| } | ||
|
|
||
| byte[] classBytes = cv.toByteArray(); | ||
|
|
||
| Class<?> cls = new ClassLoader() { | ||
| public Class<?> defineClass() { | ||
| return defineClass(className, classBytes, 0, classBytes.length); | ||
| } | ||
| }.defineClass(); | ||
| Object instance; | ||
| try { | ||
| instance = cls | ||
| .getConstructor(constructorParameterTypes) | ||
| .newInstance(constructorArguments); | ||
| cls.getField("methods") | ||
| .set(instance, methods); | ||
| cls.getField("methodInterceptor") | ||
| .set(instance, interceptor); | ||
| } catch (ReflectiveOperationException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| return instance; | ||
| } | ||
|
|
||
| } |
31 changes: 31 additions & 0 deletions
31
sslr-core/src/main/java/com/sonar/sslr/impl/typed/MethodInterceptor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| /* | ||
| * SonarSource Language Recognizer | ||
| * Copyright (C) 2010-2019 SonarSource SA | ||
| * mailto:info AT sonarsource DOT com | ||
| * | ||
| * This program is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU Lesser General Public | ||
| * License as published by the Free Software Foundation; either | ||
| * version 3 of the License, or (at your option) any later version. | ||
| * | ||
| * This program 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 | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program; if not, write to the Free Software Foundation, | ||
| * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | ||
| */ | ||
| package com.sonar.sslr.impl.typed; | ||
|
|
||
| import java.lang.reflect.Method; | ||
|
|
||
| public interface MethodInterceptor { | ||
|
|
||
| /** | ||
| * @return {@code true} if original method should not be invoked | ||
| */ | ||
| boolean intercept(Method method); | ||
|
|
||
| } |
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