Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* 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;
import scouter.agent.ClassDesc;
import scouter.agent.Configure;
import scouter.agent.asm.util.HookingSet;
import scouter.agent.trace.TraceSQL;
import scouter.org.objectweb.asm.ClassVisitor;
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.Set;
public class InitialContextASM implements IASM, Opcodes {
private Set target = HookingSet.getClassSet(Configure.getInstance().hook_context_classes);
public ClassVisitor transform(ClassVisitor cv, String className, ClassDesc classDesc) {
if (Configure.getInstance()._hook_dbconn_enabled == false) {
return cv;
}
if (target.contains(className)) {
return new InitialContextCV(cv, className);
}
return cv;
}
}
// ///////////////////////////////////////////////////////////////////////////
class InitialContextCV extends ClassVisitor implements Opcodes {
public String className;
public InitialContextCV(ClassVisitor cv, String className) {
super(ASM5, cv);
this.className = className;
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
if (mv == null) {
return mv;
}
if ("lookup".equals(name) && "(Ljava/lang/String;)Ljava/lang/Object;".equals(desc)) {
return new InitialContextMV(access, desc, mv, className, name, desc);
}
return mv;
}
}
// ///////////////////////////////////////////////////////////////////////////
class InitialContextMV extends LocalVariablesSorter implements Opcodes {
private static final String CLASS = TraceSQL.class.getName().replace('.', '/');
private static final String METHOD = "ctxLookup";
private static final String SIGNATURE = "(Ljava/lang/Object;Ljava/lang/Object;)V";
private Type returnType;
public InitialContextMV(int access, String desc, MethodVisitor mv, String classname, String methodname,
String methoddesc) {
super(ASM5, access, desc, mv);
this.returnType = Type.getReturnType(desc);
}
@Override
public void visitInsn(int opcode) {
if ((opcode >= IRETURN && opcode <= RETURN)) {
code();
}
mv.visitInsn(opcode);
}
private void code() {
int i = newLocal(returnType);
mv.visitVarInsn(Opcodes.ASTORE, i);
mv.visitVarInsn(Opcodes.ALOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, 0);
mv.visitVarInsn(Opcodes.ALOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, CLASS, METHOD, SIGNATURE, false);
}
}
