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Commit c4caca11 authored by Alex Light's avatar Alex Light
Browse files

Add agent startup-attach 

Add ability to give 'startup-agents' that are automatically loaded
when a (debuggable) app starts. These agents are any files in the
'code_cache/startup_agents' directory. The agents are started with the
apps data_directory as an argument.

Test: Install debuggable apk (here com.antonioleiva.bandhookkotlin)
  walleye:/ $ run-as com.antonioleiva.bandhookkotlin sh
  walleye:/data/data/com.antonioleiva.bandhookkotlin $ mkdir code_cache/startup_agents
  walleye:/data/data/com.antonioleiva.bandhookkotlin $ cp /data/local/tmp/libtifasts32.so code_cache
  walleye:/data/data/com.antonioleiva.bandhookkotlin $ cp /data/local/tmp/libtifasts64.so code_cache
  walleye:/data/data/com.antonioleiva.bandhookkotlin $ cp /data/local/tmp/libchainagentss32.so code_cache/startup_agents/
  walleye:/data/data/com.antonioleiva.bandhookkotlin $ cp /data/local/tmp/libchainagentss64.so code_cache/startup_agents/
  walleye:/data/data/com.antonioleiva.bandhookkotlin $ echo $PWD/code_cache/libtifasts32.so=log,ClassLoad > chain_agents.txt
  walleye:/data/data/com.antonioleiva.bandhookkotlin $ echo $PWD/code_cache/libtifasts64.so=log,ClassLoad >> chain_agents.txt
  Start bandhookkotlin
  Examine logcat

Bug: 135627501

Cherry-picked from commit c0fce111c8b due to merge conflict.

Change-Id: Ib82b27df90c7964a995288d8b2b3d348a11cdd80
Merged-In: Ib82b27df90c7964a995288d8b2b3d348a11cdd80
parent 5f00bf12

core/java/android/app/ActivityThread.java

+21 −0
Original line number Diff line number Diff line
@@ -190,6 +190,7 @@ import java.lang.ref.WeakReference; 
import java.lang.reflect.Method;

import java.net.InetAddress;

import java.nio.file.Files;

import java.nio.file.Path;

import java.text.DateFormat;

import java.util.ArrayList;

import java.util.Arrays;
@@ -6365,6 +6366,26 @@ public final class ActivityThread extends ClientTransactionHandler { 
        NetworkSecurityConfigProvider.install(appContext);

        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);





        if (isAppDebuggable) {

            try {

                // Load all the agents in the code_cache/startup_agents directory.

                // We pass the absolute path to the data_dir as an argument.

                Path startup_path = appContext.getCodeCacheDir().toPath().resolve("startup_agents");

                if (Files.exists(startup_path)) {

                    for (Path p : Files.newDirectoryStream(startup_path)) {

                        handleAttachAgent(

                                p.toAbsolutePath().toString()

                                + "="

                                + appContext.getDataDir().toPath().toAbsolutePath().toString(),

                                data.info);

                    }

                }

            } catch (Exception e) {

                // Ignored.

            }

        }



        // Continue loading instrumentation.

        if (ii != null) {

            ApplicationInfo instrApp;