diff --git a/libs/binder/IServiceManager.cpp b/libs/binder/IServiceManager.cpp
index 9aa82d9..6d728dc 100644
--- a/libs/binder/IServiceManager.cpp
+++ b/libs/binder/IServiceManager.cpp
@@ -74,6 +74,7 @@
     Vector<String16> listServices(int dumpsysPriority) override;
     sp<IBinder> waitForService(const String16& name16) override;
     bool isDeclared(const String16& name) override;
+    Vector<String16> getDeclaredInstances(const String16& interface) override;
 
     // for legacy ABI
     const String16& getInterfaceDescriptor() const override {
@@ -373,4 +374,18 @@
     return declared;
 }
 
+Vector<String16> ServiceManagerShim::getDeclaredInstances(const String16& interface) {
+    std::vector<std::string> out;
+    if (!mTheRealServiceManager->getDeclaredInstances(String8(interface).c_str(), &out).isOk()) {
+        return {};
+    }
+
+    Vector<String16> res;
+    res.setCapacity(out.size());
+    for (const std::string& instance : out) {
+        res.push(String16(instance.c_str()));
+    }
+    return res;
+}
+
 } // namespace android
diff --git a/libs/binder/aidl/android/os/IServiceManager.aidl b/libs/binder/aidl/android/os/IServiceManager.aidl
index ff15460..2b1e492 100644
--- a/libs/binder/aidl/android/os/IServiceManager.aidl
+++ b/libs/binder/aidl/android/os/IServiceManager.aidl
@@ -99,6 +99,14 @@
     boolean isDeclared(@utf8InCpp String name);
 
     /**
+     * Returns all declared instances for a particular interface.
+     *
+     * For instance, if 'android.foo.IFoo/foo' is declared, and 'android.foo.IFoo' is
+     * passed here, then ["foo"] would be returned.
+     */
+    @utf8InCpp String[] getDeclaredInstances(@utf8InCpp String iface);
+
+    /**
      * Request a callback when the number of clients of the service changes.
      * Used by LazyServiceRegistrar to dynamically stop services that have no clients.
      */
diff --git a/libs/binder/include/binder/IServiceManager.h b/libs/binder/include/binder/IServiceManager.h
index 1d520c1..3c5ccc1 100644
--- a/libs/binder/include/binder/IServiceManager.h
+++ b/libs/binder/include/binder/IServiceManager.h
@@ -96,6 +96,11 @@
      * service.
      */
     virtual bool isDeclared(const String16& name) = 0;
+
+    /**
+     * Get all instances of a service as declared in the VINTF manifest
+     */
+    virtual Vector<String16> getDeclaredInstances(const String16& interface) = 0;
 };
 
 sp<IServiceManager> defaultServiceManager();
diff --git a/libs/fakeservicemanager/ServiceManager.cpp b/libs/fakeservicemanager/ServiceManager.cpp
index 6964324..4ecbe53 100644
--- a/libs/fakeservicemanager/ServiceManager.cpp
+++ b/libs/fakeservicemanager/ServiceManager.cpp
@@ -61,4 +61,16 @@
     return mNameToService.find(name) != mNameToService.end();
 }
 
+Vector<String16> ServiceManager::getDeclaredInstances(const String16& name) {
+    Vector<String16> out;
+    const String16 prefix = name + String16("/");
+    for (const auto& [registeredName, service] : mNameToService) {
+        (void) service;
+        if (registeredName.startsWith(prefix)) {
+            out.add(String16(registeredName.string() + prefix.size()));
+        }
+    }
+    return out;
+}
+
 }  // namespace android
diff --git a/libs/fakeservicemanager/ServiceManager.h b/libs/fakeservicemanager/ServiceManager.h
index a6b6b84..4ef47fb 100644
--- a/libs/fakeservicemanager/ServiceManager.h
+++ b/libs/fakeservicemanager/ServiceManager.h
@@ -46,6 +46,8 @@
 
     bool isDeclared(const String16& name) override;
 
+    Vector<String16> getDeclaredInstances(const String16& iface) override;
+
 private:
     std::map<String16, sp<IBinder>> mNameToService;
 };