How can I hook the xposed?

How can I hook the xposed? I decided to hook de.robv.android.XposedBridge.handleHookedMethod to hook all the methods in some apps.

package com.kyunggi.logcalls;

import android.util.*;
import de.robv.android.xposed.*;
import de.robv.android.xposed.callbacks.XC_LoadPackage.*;
import java.lang.reflect.*;

import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;

public class Main implements IXposedHookLoadPackage
{
    private String TAG = "LogCall";
    public void handleLoadPackage(final LoadPackageParam lpparam)throwsThrowable {
        if(!lpparam.packageName.equals("com.android.bluetooth"))
        {
            Log.i(TAG, "Not:" + lpparam.packageName);
            return;
        }
        Log.i(TAG, "Yes" + lpparam.packageName);  

        findAndHookMethod("de.robv.android.xposed.XposedBridge", lpparam.classLoader, "handleHookedMethod", Member.class, int.class, Object.class, Object.class, Object[].class, newXC_MethodHook(){
                @ Override
                protected void beforeHookedMethod(MethodHookParamparam)throwsThrowable{
                    Method method=(Method)param.args[0];
                    Log.v(TAG, "className" + method.getClass().getName()+", methodName" + method.getName());
                }

            });
    }
}

However, ClassNotFoundException occurs.How can I solve this problem if I think it's a class loader problem?

de.robv.android.xposed.XposedHelpers$ClassNotFoundError:
java.lang.ClassNotFoundException: de.robv.android.xposed.XposedBridge

android java

2022-09-30 19:46

1 Answers

I got a system class loader using the following code and the hook itself succeeded.

ClassLoader rootcl=lpparam.classLoader.getSystemClassLoader();
        findAndHookMethod("de.robv.android.xposed.XposedBridge", rootcl, "handleHookedMethod", Member.class, int.class, Object.class, Object.class, Object[].class, newXC_MethodHook(){
                @ Override
                protected void beforeHookedMethod(MethodHookParamparam)throwsThrowable{
                    Method method=(Method)param.args[0];
                    Log.v(TAG, "className" + method.getClass().getName()+", methodName" + method.getName());
                }

            });

By the way!

10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132]JNIERROR(app bug):
local reference table overflow (max=512) 10-18 18:27:22.198 F/art
(4490):art/runtime/indirect_reference_table.cc:132]local reference
table dump:10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] Last 10 entries (of
512): 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 511:0x12c58510
java.lang.reflect.Method 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132]510:0x12c8b860
java.lang.Object[] (5 elements) 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 509:0x12c8b840
java.lang.Object[] (5 elements) 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 508:0x12c45958
de.robv.android.xposed.XposedBridge$AdditionalHookInfo10-18
18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 507:0x12c58510
java.lang.reflect.Method 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 506:0x12c8b840
java.lang.Object[] (5 elements) 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 505:0x12c8b820
java.lang.Object[] (5 elements) 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 504:0x12c45958
de.robv.android.xposed.XposedBridge$AdditionalHookInfo10-18
18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 503:0x12c58510
java.lang.reflect.Method 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 502:0x12c8b820
java.lang.Object[] (5 elements) 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132]Summary: 10-18
18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 245 of
java.lang.Object[] (5 elements) (123 unique instances) 10-18
18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 124 of
java.lang.reflect.Method(2 unique instances) 10-18 18:27:22.198 F/art
(4490):art/runtime/indirect_reference_table.cc:132]123 of
de.robv.android.xposed.XposedBridge$AdditionalHookInfo(2unique
) instances) 10-18 18:27:22.198 F/art (4490):
art/runtime/indirect_reference_table.cc:132] 5 of
java.lang.Class (4 unique instances) 10-18 18:27:22.198 F/art
(4490): art/runtime/indirect_reference_table.cc:132] 3 of
android.app.ResourcesManager(1 unique instances) 10-18 18:27:22.199
F/art (4490):art/runtime/indirect_reference_table.cc:132]
3 of java.lang.String (3 unique instances)

Therefore, I think XPOSED framework hook is not good.

2022-09-30 19:46

If you have any answers or tips

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