Support an ABI flag for instrumentation.

Allows us to choose what ABI a process uses when
launching it with "adb shell am instrument", for eg.

adb shell am instrument --abi arm64-v8a component/runner

Note that we only perform very basic validation of the
ABI. In general, there is no guarantee that the app will
launch with the instruction set we choose, for eg. if it
has native libraries that are for a different ABI.

bug: 14453227

Change-Id: Ifb7e89b53675080dc87941091ee5ac360f218d7f

1 files changed, 29 insertions, 2 deletions

diff --git a/cmds/am/src/com/android/commands/am/Am.java b/cmds/am/src/com/android/commands/am/Am.java
index 0344d26..ffe7ac9 100644
--- a/cmds/am/src/com/android/commands/am/Am.java
+++ b/cmds/am/src/com/android/commands/am/Am.java
@@ -33,6 +33,7 @@ import android.content.pm.IPackageManager;
 import android.content.pm.ResolveInfo;
 import android.net.Uri;
 import android.os.Binder;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.ParcelFileDescriptor;
 import android.os.RemoteException;
@@ -43,6 +44,8 @@ import android.util.AndroidException;
 import android.view.IWindowManager;
 import com.android.internal.os.BaseCommand;
 
+import dalvik.system.VMRuntime;
+
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -91,7 +94,11 @@ public class Am extends BaseCommand {
                 "       am broadcast [--user <USER_ID> | all | current] <INTENT>\n" +
                 "       am instrument [-r] [-e <NAME> <VALUE>] [-p <FILE>] [-w]\n" +
                 "               [--user <USER_ID> | current]\n" +
-                "               [--no-window-animation] <COMPONENT>\n" +
+                "               [--no-window-animation]\n" +
+                "               [--abi <ABI>]\n : Launch the instrumented process with the "  +
+                "                   selected ABI. This assumes that the process supports the" +
+                "                   selected ABI." +
+                "               <COMPONENT>\n" +
                 "       am profile start [--user <USER_ID> current] <PROCESS> <FILE>\n" +
                 "       am profile stop [--user <USER_ID> current] [<PROCESS>]\n" +
                 "       am dumpheap [--user <USER_ID> current] [-n] <PROCESS> <FILE>\n" +
@@ -813,6 +820,7 @@ public class Am extends BaseCommand {
         Bundle args = new Bundle();
         String argKey = null, argValue = null;
         IWindowManager wm = IWindowManager.Stub.asInterface(ServiceManager.getService("window"));
+        String abi = null;
 
         String opt;
         while ((opt=nextOption()) != null) {
@@ -831,6 +839,8 @@ public class Am extends BaseCommand {
                 no_window_animation = true;
             } else if (opt.equals("--user")) {
                 userId = parseUserArg(nextArgRequired());
+            } else if (opt.equals("--abi")) {
+                abi = nextArgRequired();
             } else {
                 System.err.println("Error: Unknown option: " + opt);
                 return;
@@ -861,7 +871,24 @@ public class Am extends BaseCommand {
             wm.setAnimationScale(1, 0.0f);
         }
 
-        if (!mAm.startInstrumentation(cn, profileFile, 0, args, watcher, connection, userId)) {
+        if (abi != null) {
+            final String[] supportedAbis = Build.SUPPORTED_ABIS;
+            boolean matched = false;
+            for (String supportedAbi : supportedAbis) {
+                if (supportedAbi.equals(abi)) {
+                    matched = true;
+                    break;
+                }
+            }
+
+            if (!matched) {
+                throw new AndroidException(
+                        "INSTRUMENTATION_FAILED: Unsupported instruction set " + abi);
+            }
+        }
+
+        if (!mAm.startInstrumentation(cn, profileFile, 0, args, watcher, connection, userId,
+                abi)) {
             throw new AndroidException("INSTRUMENTATION_FAILED: " + cn.flattenToString());
         }