diff --git a/adb/client/commandline.cpp b/adb/client/commandline.cpp
index f25955d..552df41 100644
--- a/adb/client/commandline.cpp
+++ b/adb/client/commandline.cpp
@@ -838,26 +838,25 @@
 
 #define SIDELOAD_HOST_BLOCK_SIZE (CHUNK_SIZE)
 
-/*
- * The sideload-host protocol serves the data in a file (given on the
- * command line) to the client, using a simple protocol:
- *
- * - The connect message includes the total number of bytes in the
- *   file and a block size chosen by us.
- *
- * - The other side sends the desired block number as eight decimal
- *   digits (eg "00000023" for block 23).  Blocks are numbered from
- *   zero.
- *
- * - We send back the data of the requested block.  The last block is
- *   likely to be partial; when the last block is requested we only
- *   send the part of the block that exists, it's not padded up to the
- *   block size.
- *
- * - When the other side sends "DONEDONE" instead of a block number,
- *   we hang up.
- */
-static int adb_sideload_host(const char* filename) {
+// Connects to the sideload / rescue service on the device (served by minadbd) and sends over the
+// data in an OTA package.
+//
+// It uses a simple protocol as follows.
+//
+// - The connect message includes the total number of bytes in the file and a block size chosen by
+//   us.
+//
+// - The other side sends the desired block number as eight decimal digits (e.g. "00000023" for
+//   block 23). Blocks are numbered from zero.
+//
+// - We send back the data of the requested block. The last block is likely to be partial; when the
+//   last block is requested we only send the part of the block that exists, it's not padded up to
+//   the block size.
+//
+// - When the other side sends "DONEDONE" or "FAILFAIL" instead of a block number, we have done all
+//   the data transfer.
+//
+static int adb_sideload_install(const char* filename, bool rescue_mode) {
     // TODO: use a LinePrinter instead...
     struct stat sb;
     if (stat(filename, &sb) == -1) {
@@ -870,14 +869,18 @@
         return -1;
     }
 
-    std::string service =
-            android::base::StringPrintf("sideload-host:%" PRId64 ":%d",
-                                        static_cast<int64_t>(sb.st_size), SIDELOAD_HOST_BLOCK_SIZE);
+    std::string service = android::base::StringPrintf(
+            "%s:%" PRId64 ":%d", rescue_mode ? "rescue-install" : "sideload-host",
+            static_cast<int64_t>(sb.st_size), SIDELOAD_HOST_BLOCK_SIZE);
     std::string error;
     unique_fd device_fd(adb_connect(service, &error));
     if (device_fd < 0) {
         fprintf(stderr, "adb: sideload connection failed: %s\n", error.c_str());
 
+        if (rescue_mode) {
+            return -1;
+        }
+
         // If this is a small enough package, maybe this is an older device that doesn't
         // support sideload-host. Try falling back to the older (<= K) sideload method.
         if (sb.st_size > INT_MAX) {
@@ -901,10 +904,14 @@
         }
         buf[8] = '\0';
 
-        if (strcmp("DONEDONE", buf) == 0) {
+        if (strcmp(kSideloadServiceExitSuccess, buf) == 0 ||
+            strcmp(kSideloadServiceExitFailure, buf) == 0) {
             printf("\rTotal xfer: %.2fx%*s\n",
                    static_cast<double>(xfer) / (sb.st_size ? sb.st_size : 1),
                    static_cast<int>(strlen(filename) + 10), "");
+            if (strcmp(kSideloadServiceExitFailure, buf) == 0) {
+                return 1;
+            }
             return 0;
         }
 
@@ -1628,11 +1635,25 @@
         return adb_kill_server() ? 0 : 1;
     } else if (!strcmp(argv[0], "sideload")) {
         if (argc != 2) error_exit("sideload requires an argument");
-        if (adb_sideload_host(argv[1])) {
+        if (adb_sideload_install(argv[1], false /* rescue_mode */)) {
             return 1;
         } else {
             return 0;
         }
+    } else if (!strcmp(argv[0], "rescue")) {
+        // adb rescue getprop <prop>
+        // adb rescue install <filename>
+        if (argc != 3) error_exit("rescue requires two arguments");
+        if (!strcmp(argv[1], "getprop")) {
+            return adb_connect_command(android::base::StringPrintf("rescue-getprop:%s", argv[2]));
+        } else if (!strcmp(argv[1], "install")) {
+            if (adb_sideload_install(argv[2], true /* rescue_mode */) != 0) {
+                return 1;
+            }
+        } else {
+            error_exit("invalid rescue argument");
+        }
+        return 0;
     } else if (!strcmp(argv[0], "tcpip")) {
         if (argc != 2) error_exit("tcpip requires an argument");
         int port;
diff --git a/adb/services.h b/adb/services.h
index 0ce25ba..8f3919b 100644
--- a/adb/services.h
+++ b/adb/services.h
@@ -23,5 +23,9 @@
 constexpr char kShellServiceArgPty[] = "pty";
 constexpr char kShellServiceArgShellProtocol[] = "v2";
 
+// Special flags sent by minadbd that indicate the end of sideload transfer and install result.
+constexpr char kSideloadServiceExitSuccess[] = "DONEDONE";
+constexpr char kSideloadServiceExitFailure[] = "FAILFAIL";
+
 unique_fd create_service_thread(const char* service_name, std::function<void(unique_fd)> func);
 #endif  // SERVICES_H_
diff --git a/init/Android.mk b/init/Android.mk
index efa8d87..b02c926 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -65,6 +65,11 @@
 LOCAL_MODULE_PATH := $(TARGET_RAMDISK_OUT)
 LOCAL_UNSTRIPPED_PATH := $(TARGET_RAMDISK_OUT_UNSTRIPPED)
 
+# Install adb_debug.prop into debug ramdisk.
+# This allows adb root on a user build, when debug ramdisk is used.
+LOCAL_REQUIRED_MODULES := \
+   adb_debug.prop \
+
 # Set up the same mount points on the ramdisk that system-as-root contains.
 LOCAL_POST_INSTALL_CMD := mkdir -p \
     $(TARGET_RAMDISK_OUT)/apex \
diff --git a/libprocessgroup/include/processgroup/processgroup.h b/libprocessgroup/include/processgroup/processgroup.h
index 8d150ad..7e6bf45 100644
--- a/libprocessgroup/include/processgroup/processgroup.h
+++ b/libprocessgroup/include/processgroup/processgroup.h
@@ -24,18 +24,21 @@
 __BEGIN_DECLS
 
 static constexpr const char* CGROUPV2_CONTROLLER_NAME = "cgroup2";
-static constexpr const char* CGROUPS_RC_PATH = "/dev/cgroup_info/cgroup.rc";
 
 bool CgroupGetControllerPath(const std::string& cgroup_name, std::string* path);
 bool CgroupGetAttributePath(const std::string& attr_name, std::string* path);
 bool CgroupGetAttributePathForTask(const std::string& attr_name, int tid, std::string* path);
 
-bool UsePerAppMemcg();
-
 bool SetTaskProfiles(int tid, const std::vector<std::string>& profiles, bool use_fd_cache = false);
 bool SetProcessProfiles(uid_t uid, pid_t pid, const std::vector<std::string>& profiles,
                         bool use_fd_cache = false);
 
+#ifndef __ANDROID_VNDK__
+
+static constexpr const char* CGROUPS_RC_PATH = "/dev/cgroup_info/cgroup.rc";
+
+bool UsePerAppMemcg();
+
 // Return 0 and removes the cgroup if there are no longer any processes in it.
 // Returns -1 in the case of an error occurring or if there are processes still running
 // even after retrying for up to 200ms.
@@ -55,4 +58,6 @@
 
 void removeAllProcessGroups(void);
 
+#endif // __ANDROID_VNDK__
+
 __END_DECLS
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index c464c17..f084cd2 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -377,4 +377,13 @@
 	$(hide) $(foreach lib,$(PRIVATE_VNDK_SAMEPROCESS_LIBRARIES), \
 		echo $(lib).so >> $@;)
 
+#######################################
+# adb_debug.prop in debug ramdisk
+include $(CLEAR_VARS)
+LOCAL_MODULE := adb_debug.prop
+LOCAL_SRC_FILES := $(LOCAL_MODULE)
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_PATH := $(TARGET_DEBUG_RAMDISK_OUT)
+include $(BUILD_PREBUILT)
+
 include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/rootdir/adb_debug.prop b/rootdir/adb_debug.prop
new file mode 100644
index 0000000..37e2f2d
--- /dev/null
+++ b/rootdir/adb_debug.prop
@@ -0,0 +1,12 @@
+# Note: This file will be loaded with highest priority to override
+# other system properties, if a special ramdisk with "/force_debuggable"
+# is used and the device is unlocked.
+
+# Disable adb authentication to allow test automation on user build GSI
+ro.adb.secure=0
+
+# Allow 'adb root' on user build GSI
+ro.debuggable=1
+
+# Introduce this property to indicate that init has loaded adb_debug.prop
+ro.force.debuggable=1