diff --git a/base/HidlSupport.cpp b/base/HidlSupport.cpp
index 094e0b1..01590c3 100644
--- a/base/HidlSupport.cpp
+++ b/base/HidlSupport.cpp
@@ -61,15 +61,13 @@
         LOG(WARNING) << "getTransportFromManifest: Cannot find vendor interface manifest.";
         return vintf::Transport::EMPTY;
     }
-    size_t majorVer;
-    size_t minorVer;
-    if (   !::android::base::ParseUint(fqName.getPackageMajorVersion(), &majorVer)
-        || !::android::base::ParseUint(fqName.getPackageMinorVersion(), &minorVer)) {
+    if (!fqName.hasVersion()) {
         LOG(ERROR) << "getTransportFromManifest: " << fqName.string()
                    << " does not specify a version.";
         return vintf::Transport::EMPTY;
     }
-    vintf::Transport tr = vm->getTransport(package, vintf::Version{majorVer, minorVer});
+    vintf::Transport tr = vm->getTransport(package,
+            vintf::Version{fqName.getPackageMajorVersion(), fqName.getPackageMinorVersion()});
     if (tr == vintf::Transport::EMPTY) {
         LOG(WARNING) << "getTransportFromManifest: Cannot find entry "
                      << package << fqName.atVersion() << " in vendor interface manifest.";
@@ -397,8 +395,10 @@
                     const char *,
                     const char *,
                     std::vector<void *> *);
-            auto cb = (cb_fun)dlsym(handle,
-                    ("HIDL_INSTRUMENTATION_FUNCTION_" + mInterfaceName).c_str());
+            FQName package_name = FQName(mInstrumentationLibPackage);
+            auto cb = (cb_fun)dlsym(handle, ("HIDL_INSTRUMENTATION_FUNCTION_"
+                        + package_name.tokenName() + "_"
+                        + mInterfaceName).c_str());
             if ((error = dlerror()) != NULL) {
                 LOG(WARNING)
                     << "couldn't find symbol: HIDL_INSTRUMENTATION_FUNCTION_"
diff --git a/transport/ServiceManagement.cpp b/transport/ServiceManagement.cpp
index e3cbea4..9130d5b 100644
--- a/transport/ServiceManagement.cpp
+++ b/transport/ServiceManagement.cpp
@@ -102,6 +102,24 @@
     return false;
 }
 
+static void registerReference(const hidl_string &interfaceName, const hidl_string &instanceName) {
+    sp<IServiceManager> binderizedManager = defaultServiceManager();
+    if (binderizedManager == nullptr) {
+        LOG(WARNING) << "Could not registerReference for "
+                     << interfaceName << "/" << instanceName
+                     << ": null binderized manager.";
+        return;
+    }
+    auto ret = binderizedManager->registerPassthroughClient(interfaceName, instanceName, getpid());
+    if (!ret.isOk()) {
+        LOG(WARNING) << "Could not registerReference for "
+                     << interfaceName << "/" << instanceName
+                     << ": " << ret.description();
+    }
+    LOG(INFO) << "Successfully registerReference for "
+              << interfaceName << "/" << instanceName;
+}
+
 struct PassthroughServiceManager : IServiceManager {
     Return<sp<IBase>> get(const hidl_string& fqName,
                      const hidl_string& name) override {
@@ -156,6 +174,9 @@
                        << " but could not find symbol " << sym;
             return nullptr;
         }
+
+        registerReference(fqName, name);
+
         return (*generator)(name);
     }
 
@@ -166,9 +187,20 @@
         return false;
     }
 
-    Return<void> list(list_cb /* _hidl_cb */) override {
-        // TODO: add this functionality
-        LOG(FATAL) << "Cannot list services with passthrough service manager.";
+    Return<void> list(list_cb _hidl_cb) override {
+        std::vector<hidl_string> vec;
+        for (const std::string &path : {
+            HAL_LIBRARY_PATH_ODM, HAL_LIBRARY_PATH_VENDOR, HAL_LIBRARY_PATH_SYSTEM
+        }) {
+            std::vector<std::string> libs = search(path, "", ".so");
+            for (const std::string &lib : libs) {
+                std::string matchedName;
+                if (matchPackageName(lib, &matchedName)) {
+                    vec.push_back(matchedName + "/*");
+                }
+            }
+        }
+        _hidl_cb(vec);
         return Void();
     }
     Return<void> listByInterface(const hidl_string& /* fqInstanceName */,
@@ -186,25 +218,17 @@
         return false;
     }
 
-    Return<void> debugDump(debugDump_cb _cb) override {
-        std::vector<InstanceDebugInfo> vec;
-        for (const std::string &path : {
-            HAL_LIBRARY_PATH_ODM, HAL_LIBRARY_PATH_VENDOR, HAL_LIBRARY_PATH_SYSTEM
-        }) {
-            std::vector<std::string> libs = search(path, "", ".so");
-            for (const std::string &lib : libs) {
-                std::string matchedName;
-                if (matchPackageName(lib, &matchedName)) {
-                    vec.push_back({
-                        .interfaceName = matchedName,
-                        .instanceName = "",
-                        .pid = -1,
-                        .ptr = 0,
-                    });
-                }
-            }
-        }
-        _cb(vec);
+    Return<void> debugDump(debugDump_cb) override {
+        // This makes no sense.
+        LOG(FATAL) << "Cannot call debugDump on passthrough service manager."
+                   << "Call it on defaultServiceManager() instead.";
+        return Void();
+    }
+
+    Return<void> registerPassthroughClient(const hidl_string &, const hidl_string &, int32_t) override {
+        // This makes no sense.
+        LOG(FATAL) << "Cannot call registerPassthroughClient on passthrough service manager. "
+                   << "Call it on defaultServiceManager() instead.";
         return Void();
     }
 
diff --git a/transport/manager/1.0/IServiceManager.hal b/transport/manager/1.0/IServiceManager.hal
index 2eafed0..61f6047 100644
--- a/transport/manager/1.0/IServiceManager.hal
+++ b/transport/manager/1.0/IServiceManager.hal
@@ -111,10 +111,7 @@
     struct InstanceDebugInfo {
         string interfaceName;
         string instanceName;
-        // negative values means N/A.
-        int32_t pid;
-        // 0 means N/A.
-        uint64_t ptr;
+        vec<int32_t> clientPids;
     };
 
     /*
@@ -123,4 +120,6 @@
      *         instance.
      */
     debugDump() generates (vec<InstanceDebugInfo> info);
+
+    oneway registerPassthroughClient(string fqName, string name, int32_t pid);
 };