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scouter.agent.asm.redis.RedisCacheKeyASM Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
* @https://github.com/scouter-project/scouter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package scouter.agent.asm.redis;
import scouter.agent.ClassDesc;
import scouter.agent.Configure;
import scouter.agent.Logger;
import scouter.agent.asm.IASM;
import scouter.agent.asm.util.AsmUtil;
import scouter.agent.asm.util.HookingSet;
import scouter.agent.trace.TraceMain;
import scouter.org.objectweb.asm.ClassVisitor;
import scouter.org.objectweb.asm.FieldVisitor;
import scouter.org.objectweb.asm.MethodVisitor;
import scouter.org.objectweb.asm.Opcodes;
import scouter.org.objectweb.asm.Type;
import scouter.org.objectweb.asm.commons.LocalVariablesSorter;
import java.util.ArrayList;
import java.util.List;
import static scouter.agent.asm.redis.RedisCacheKeyASM.KEY_ELEMENT_FIELD;
import static scouter.agent.asm.redis.RedisCacheKeyASM.KEY_ELEMENT_FIELD_DESC;
/**
* @author Gun Lee ([email protected] ) on 2018. 3. 20.
*/
public class RedisCacheKeyASM implements IASM, Opcodes {
public static final String KEY_ELEMENT_FIELD = "keyElement";
public static final String KEY_ELEMENT_FIELD_DESC = "Ljava/lang/Object;";
private Configure conf = Configure.getInstance();
private static List pattern = new ArrayList();
static {
pattern.add("org.springframework.data.redis.cache.RedisCacheKey.getKeyBytes()[B");
}
private List targetList;
public RedisCacheKeyASM() {
targetList = HookingSet.getHookingMethodSet(HookingSet.buildPatterns("", pattern));
}
public ClassVisitor transform(ClassVisitor cv, String className, ClassDesc classDesc) {
if (conf._hook_redis_enabled == false)
return cv;
for (int i = 0; i < targetList.size(); i++) {
HookingSet mset = targetList.get(i);
if (mset.classMatch.include(className)) {
return new RedisCacheKeyCV(cv, mset, className);
}
}
return cv;
}
}
class RedisCacheKeyCV extends ClassVisitor implements Opcodes {
String className;
HookingSet mset;
boolean existKeyElementField;
public RedisCacheKeyCV(ClassVisitor cv, HookingSet mset, String className) {
super(ASM5, cv);
this.mset = mset;
this.className = className;
}
@Override
public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
if (name.equals(KEY_ELEMENT_FIELD) && desc.equals(KEY_ELEMENT_FIELD_DESC)) {
existKeyElementField = true;
}
return super.visitField(access, name, desc, signature, value);
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
if (!existKeyElementField) {
Logger.println("A902", "Ignore hooking - No Field " + KEY_ELEMENT_FIELD + " on " + className);
return mv;
}
if (mv == null || mset.isA(name, desc) == false) {
return mv;
}
if (AsmUtil.isSpecial(name)) {
return mv;
}
return new GetKeyBytesMV(access, this.className, name, desc, mv);
}
}
class GetKeyBytesMV extends LocalVariablesSorter implements Opcodes {
private static final String TRACEMAIN = TraceMain.class.getName().replace('.', '/');
private static final String START_METHOD = "setRedisKey";
private static final String START_SIGNATURE = "([BLjava/lang/Object;)V";
private String className;
private String name;
private String desc;
private Type returnType;
public GetKeyBytesMV(int access, String className, String name, String desc, MethodVisitor mv) {
super(ASM5, access, desc, mv);
this.className = className;
this.name = name;
this.desc = desc;
this.returnType = Type.getReturnType(desc);
}
public void visitInsn(int opcode) {
if ((opcode >= IRETURN && opcode <= RETURN)) {
Type tp = returnType;
if (tp.getSort() == Type.ARRAY && tp.getElementType().getSort() == Type.BYTE) {
mv.visitInsn(Opcodes.DUP);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, this.className, KEY_ELEMENT_FIELD, "Ljava/lang/Object;");
mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACEMAIN, START_METHOD, START_SIGNATURE, false);
}
}
mv.visitInsn(opcode);
}
}