Add libandroid_runtime_lazy
Extract lazy loading of libandroid_runtime from libbinder_ndk
into its own library.
This lib loads libandroid_runtime on demand, so the clients
which don't use this can benefit.
Do not over-use this lib to mock the build system and pretend not
depending on libandroid_runtime.
Bug: 125550121
Test: m -j
Test: readelf -d $OUT/system/lib64/libbinder_ndk.so | grep NEED
# see if there is not libandroid_runtime
Test: atest android.binder.cts
Change-Id: I4b120686ba34f45e060594641ffc74bc1496c8c9
diff --git a/libs/android_runtime_lazy/Android.bp b/libs/android_runtime_lazy/Android.bp
new file mode 100644
index 0000000..b200314
--- /dev/null
+++ b/libs/android_runtime_lazy/Android.bp
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// libandroid_runtime_lazy is a shim library.
+// This provides very limited small set of APIs from libandroid_runtime.
+//
+// By depending on this instead of libandroid_runtime,
+// a library can be loaded without paying the cost of libandroid_runtime
+// which is quite huge. The cost will be paid when libandroid_runtime is actually used.
+//
+// For Partial-source PDK build, there is a constraint that
+// frameworks/native modules should not depend on frameworks/base.
+// This library can be used to cut down the dependency between them.
+// (e.g. libbinder_ndk)
+//
+// Some libraries which serve as LL-NDK and NDK as well may depend on this
+// instead of libandroid_runtime. When they are used by a vendor process,
+// depending on libandroid_runtime is meaningless. In this case,
+// they can depend on libandroid_runtime_lazy.
+cc_library {
+ name: "libandroid_runtime_lazy",
+ vendor_available: true,
+
+ cflags: [
+ "-Wall",
+ "-Werror",
+ "-Wunused",
+ "-Wunreachable-code",
+ ],
+
+ srcs: [
+ "android_runtime_lazy.cpp",
+ ],
+
+ shared_libs: [
+ "liblog",
+ "libutils",
+ ],
+
+ required: [
+ "libandroid_runtime",
+ ],
+
+ export_include_dirs: [
+ "include",
+ ],
+
+ header_libs: [
+ "jni_headers",
+ "libbinder_headers",
+ ],
+}