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Add agent startup-attach

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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

Change-Id: Ib82b27df90c7964a995288d8b2b3d348a11cdd80
(cherry picked from commit c0fce111c8b7c68ddb397ac7c65ac5c35a40da01)
This commit is contained in:
Alex Light
2019-08-12 10:58:29 -07:00
parent b7e133be72
commit 330e8be604
1 changed files with 22 additions and 0 deletions
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22
core/java/android/app/ActivityThread.java
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@@ -191,6 +191,8 @@ import java.io.PrintWriter;
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;
@@ -6435,6 +6437,26 @@ 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;