binder: add openDeclaredPassthroughHal()

It handles dlopen()ing a declared native hal. This can replace
android_load_sphal_library to load declared native instance. The new API
also supports when instances are from APEX.

Bug: 316051788
Test: atest servicemanager_test
Test: atest vts_treble_vintf_vendor_test
Change-Id: I95b752253e0b550d38f0543ff56134d38d838855

1 files changed, 11 insertions, 3 deletions

diff --git a/libs/ui/Gralloc5.cpp b/libs/ui/Gralloc5.cpp
index c3b2d3d808..123bef4a4f 100644
--- a/libs/ui/Gralloc5.cpp
+++ b/libs/ui/Gralloc5.cpp
@@ -83,10 +83,18 @@ static void *loadIMapperLibrary() {
             return nullptr;
         }
 
-        std::string lib_name = "mapper." + mapperSuffix + ".so";
-        void *so = android_load_sphal_library(lib_name.c_str(), RTLD_LOCAL | RTLD_NOW);
+        void* so = nullptr;
+        // TODO(b/322384429) switch this to __ANDROID_API_V__ when V is finalized
+        // TODO(b/302113279) use __ANDROID_VENDOR_API__ for vendor variant
+        if (__builtin_available(android __ANDROID_API_FUTURE__, *)) {
+            so = AServiceManager_openDeclaredPassthroughHal("mapper", mapperSuffix.c_str(),
+                                                            RTLD_LOCAL | RTLD_NOW);
+        } else {
+            std::string lib_name = "mapper." + mapperSuffix + ".so";
+            so = android_load_sphal_library(lib_name.c_str(), RTLD_LOCAL | RTLD_NOW);
+        }
         if (!so) {
-            ALOGE("Failed to load %s", lib_name.c_str());
+            ALOGE("Failed to load mapper.%s.so", mapperSuffix.c_str());
         }
         return so;
     }();