/*
* 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.AsmUtil;
import scouter.agent.asm.util.HookingSet;
import scouter.agent.trace.TraceApiCall;
import scouter.org.objectweb.asm.ClassVisitor;
import scouter.org.objectweb.asm.Label;
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 scouter.util.Pair;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class ApicallASM implements IASM, Opcodes {
private List<HookingSet> target = HookingSet.getHookingMethodSet(Configure.getInstance().hook_apicall_patterns);
private Map<String, HookingSet> reserved = new HashMap<String, HookingSet>();
public static class ApiCallTargetRegister {
public static final List<Pair<String,String>> klassMethod = new ArrayList<Pair<String,String>>();
public static void regist(String klass, String method) {
klassMethod.add(new Pair<String, String>(klass, method));
}
}
public ApicallASM() {
AsmUtil.add(reserved, "sun/net/www/protocol/http/HttpURLConnection", "getInputStream()Ljava/io/InputStream;");
AsmUtil.add(reserved, "sun/net/www/protocol/http/HttpURLConnection", "connect()V");
AsmUtil.add(reserved, "org/apache/commons/httpclient/HttpClient", "executeMethod("
+ "Lorg/apache/commons/httpclient/HostConfiguration;" + "Lorg/apache/commons/httpclient/HttpMethod;"
+ "Lorg/apache/commons/httpclient/HttpState;" + ")I");
AsmUtil.add(reserved, "org/apache/http/impl/client/InternalHttpClient", "doExecute");
AsmUtil.add(reserved, "sun/net/www/http/HttpClient", "parseHTTP");
AsmUtil.add(reserved, "org/apache/http/impl/client/AbstractHttpClient",//
"execute(Lorg/apache/http/HttpHost;" + "Lorg/apache/http/HttpRequest;"
+ "Lorg/apache/http/protocol/HttpContext;)Lorg/apache/http/HttpResponse;");
// JCO CLIENT 추가..
AsmUtil.add(reserved, "com/sap/mw/jco/JCO$Client", "execute(Ljava/lang/String;" + //
"Lcom/sap/mw/jco/JCO$ParameterList;" + //
"Lcom/sap/mw/jco/JCO$ParameterList;" + //
"Lcom/sap/mw/jco/JCO$ParameterList;" + //
"Lcom/sap/mw/jco/JCO$ParameterList;" + //
"Ljava/lang/String;Ljava/lang/String;I)V");
AsmUtil.add(reserved, "io/reactivex/netty/protocol/http/client/HttpClientImpl", "submit");
AsmUtil.add(reserved, "org/springframework/web/client/RestTemplate",
"doExecute(" +
"Ljava/net/URI;" +
"Lorg/springframework/http/HttpMethod;" +
"Lorg/springframework/web/client/RequestCallback;" +
"Lorg/springframework/web/client/ResponseExtractor;" +
")Ljava/lang/Object;");
AsmUtil.add(reserved, "org/springframework/web/client/AsyncRestTemplate",
"doExecute(" +
"Ljava/net/URI;" +
"Lorg/springframework/http/HttpMethod;" +
"Lorg/springframework/web/client/AsyncRequestCallback;" +
"Lorg/springframework/web/client/ResponseExtractor;" +
")Lorg/springframework/util/concurrent/ListenableFuture;");
for(int i = ApiCallTargetRegister.klassMethod.size() - 1; i >= 0; i--) {
AsmUtil.add(reserved, ApiCallTargetRegister.klassMethod.get(i).getLeft(), ApiCallTargetRegister.klassMethod.get(i).getRight());
}
}
public ClassVisitor transform(ClassVisitor cv, String className, ClassDesc classDesc) {
if (Configure.getInstance()._hook_methods_enabled == false) {
return cv;
}
HookingSet mset = reserved.get(className);
if (mset != null)
return new ApicallExtCV(cv, mset, className);
for (int i = 0; i < target.size(); i++) {
mset = target.get(i);
if (mset.classMatch.include(className)) {
return new ApicallExtCV(cv, mset, className);
}
}
return cv;
}
}
class ApicallExtCV extends ClassVisitor implements Opcodes {
public String className;
private HookingSet mset;
public ApicallExtCV(ClassVisitor cv, HookingSet mset, String className) {
super(ASM4, cv);
this.mset = mset;
this.className = className;
}
@Override
public MethodVisitor visitMethod(int access, String methodName, String desc, String signature, String[] exceptions) {
MethodVisitor mv = super.visitMethod(access, methodName, desc, signature, exceptions);
if (mv == null || mset.isA(methodName, desc) == false) {
return mv;
}
if (AsmUtil.isSpecial(methodName)) {
return mv;
}
//Logger.println("apicall: " + className + "." + methodName + desc);
return new ApicallExtMV(access, desc, mv, Type.getArgumentTypes(desc), (access & ACC_STATIC) != 0, className,
methodName, desc);
}
}
class ApicallExtMV extends LocalVariablesSorter implements Opcodes {
private static final String TRACESUBCALL = TraceApiCall.class.getName().replace('.', '/');
private final static String START_METHOD = "startApicall";
private static final String START_SIGNATURE = "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;";
private final static String END_METHOD = "endApicall";
private static final String END_SIGNATURE = "(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Throwable;)V";
private Label startFinally = new Label();
public ApicallExtMV(int access, String desc, MethodVisitor mv, Type[] paramTypes, boolean isStatic,
String classname, String methodname, String methoddesc) {
super(ASM4, access, desc, mv);
this.paramTypes = paramTypes;
this.returnType = Type.getReturnType(desc);
this.isStatic = isStatic;
this.className = classname;
this.methodName = methodname;
this.methodDesc = methoddesc;
}
private Type[] paramTypes;
private Type returnType;
private boolean isStatic;
private String className;
private String methodName;
private String methodDesc;
private int statIdx;
public void visitCode() {
int sidx = isStatic ? 0 : 1;
int arrVarIdx = newLocal(Type.getType("[Ljava/lang/Object;"));
AsmUtil.PUSH(mv, paramTypes.length);
mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
mv.visitVarInsn(Opcodes.ASTORE, arrVarIdx);
for (int i = 0; i < paramTypes.length; i++) {
Type tp = paramTypes[i];
mv.visitVarInsn(Opcodes.ALOAD, arrVarIdx);
AsmUtil.PUSH(mv, i);
switch (tp.getSort()) {
case Type.BOOLEAN:
mv.visitVarInsn(Opcodes.ILOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;",
false);
break;
case Type.BYTE:
mv.visitVarInsn(Opcodes.ILOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;", false);
break;
case Type.CHAR:
mv.visitVarInsn(Opcodes.ILOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;",
false);
break;
case Type.SHORT:
mv.visitVarInsn(Opcodes.ILOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;", false);
break;
case Type.INT:
mv.visitVarInsn(Opcodes.ILOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;",
false);
break;
case Type.LONG:
mv.visitVarInsn(Opcodes.LLOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false);
break;
case Type.FLOAT:
mv.visitVarInsn(Opcodes.FLOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;", false);
break;
case Type.DOUBLE:
mv.visitVarInsn(Opcodes.DLOAD, sidx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;", false);
break;
default:
mv.visitVarInsn(Opcodes.ALOAD, sidx);
}
mv.visitInsn(Opcodes.AASTORE);
sidx += tp.getSize();
}
AsmUtil.PUSH(mv, className);
AsmUtil.PUSH(mv, methodName);
AsmUtil.PUSH(mv, methodDesc);
if (isStatic) {
AsmUtil.PUSHNULL(mv);
} else {
mv.visitVarInsn(Opcodes.ALOAD, 0);
}
mv.visitVarInsn(Opcodes.ALOAD, arrVarIdx);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACESUBCALL, START_METHOD, START_SIGNATURE, false);
statIdx = newLocal(Type.getType(Object.class));
mv.visitVarInsn(Opcodes.ASTORE, statIdx);
mv.visitLabel(startFinally);
mv.visitCode();
}
@Override
public void visitInsn(int opcode) {
if ((opcode >= IRETURN && opcode <= RETURN)) {
capReturn();
}
mv.visitInsn(opcode);
}
private void capReturn() {
Type tp = returnType;
if (tp == null || tp.equals(Type.VOID_TYPE)) {
mv.visitVarInsn(Opcodes.ALOAD, statIdx);
mv.visitInsn(Opcodes.ACONST_NULL);
mv.visitInsn(Opcodes.ACONST_NULL);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACESUBCALL, END_METHOD, END_SIGNATURE, false);
return;
}
int i = newLocal(tp);
switch (tp.getSort()) {
case Type.BOOLEAN:
mv.visitVarInsn(Opcodes.ISTORE, i);
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;", false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
case Type.BYTE:
mv.visitVarInsn(Opcodes.ISTORE, i);
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;", false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
case Type.CHAR:
mv.visitVarInsn(Opcodes.ISTORE, i);
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;",
false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
case Type.SHORT:
mv.visitVarInsn(Opcodes.ISTORE, i);
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;", false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
case Type.INT:
mv.visitVarInsn(Opcodes.ISTORE, i);
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.ILOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;", false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
case Type.LONG:
mv.visitVarInsn(Opcodes.LSTORE, i);
mv.visitVarInsn(Opcodes.LLOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.LLOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
case Type.FLOAT:
mv.visitVarInsn(Opcodes.FSTORE, i);
mv.visitVarInsn(Opcodes.FLOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.FLOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;", false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
case Type.DOUBLE:
mv.visitVarInsn(Opcodes.DSTORE, i);
mv.visitVarInsn(Opcodes.DLOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.DLOAD, i);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;", false);
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
break;
default:
mv.visitVarInsn(Opcodes.ASTORE, i);
mv.visitVarInsn(Opcodes.ALOAD, i);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitVarInsn(Opcodes.ALOAD, i);// return
mv.visitInsn(Opcodes.ACONST_NULL);// throwable
}
mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACESUBCALL, END_METHOD, END_SIGNATURE, false);
}
@Override
public void visitMaxs(int maxStack, int maxLocals) {
Label endFinally = new Label();
mv.visitTryCatchBlock(startFinally, endFinally, endFinally, null);
mv.visitLabel(endFinally);
mv.visitInsn(DUP);
int errIdx = newLocal(Type.getType(Throwable.class));
mv.visitVarInsn(Opcodes.ASTORE, errIdx);
mv.visitVarInsn(Opcodes.ALOAD, statIdx);// stat
mv.visitInsn(Opcodes.ACONST_NULL);// return
mv.visitVarInsn(Opcodes.ALOAD, errIdx);// throwable
mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACESUBCALL, END_METHOD, END_SIGNATURE, false);
mv.visitInsn(ATHROW);
mv.visitMaxs(maxStack + 8, maxLocals + 2);
}
}