Actually use the embedded assembly store

src/Xamarin.Android.Build.Tasks/Tasks/BuildApk.cs

@@ -115,6 +115,9 @@ public class BuildApk : AndroidTask
 		[Required]
 		public string CompressedAssembliesDir { get; set; }
 
+		[Required]
+		public bool AssemblyStoreEmbeddedInRuntime { get; set; }
+
 		[Output]
 		public ITaskItem[] OutputFiles { get; set; }
 
@@ -430,6 +433,11 @@ void AddAssemblies (ZipArchiveEx apk, bool debug, bool compress, IDictionary<And
 			AssemblyStoreBuilder? storeBuilder = null;
 
 			if (UseAssemblyStore) {
+				if (AssemblyStoreEmbeddedInRuntime) {
+					// We don't need to do anything here, the store is in `libxamarin-app.so`
+					return;
+				}
+
 				storeBuilder = new AssemblyStoreBuilder (Log);
 			}
 

src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets

@@ -2115,7 +2115,8 @@ because xbuild doesn't support framework reference assemblies.
     ZipFlushSizeLimit="$(_ZipFlushSizeLimit)"
     ZipAlignmentPages="$(AndroidZipAlignment)"
     UseAssemblyStore="$(AndroidUseAssemblyStore)"
-    CompressedAssembliesDir="$(_AndroidCompressedAssembliesDir)">
+    CompressedAssembliesDir="$(_AndroidCompressedAssembliesDir)"
+    AssemblyStoreEmbeddedInRuntime="$(_AndroidEmbedAssemblyStoreInRuntime)">
     <Output TaskParameter="OutputFiles" ItemName="ApkFiles" />
   </BuildApk>
   <BuildBaseAppBundle
@@ -2154,7 +2155,8 @@ because xbuild doesn't support framework reference assemblies.
       ZipFlushSizeLimit="$(_ZipFlushSizeLimit)"
       ZipAlignmentPages="$(AndroidZipAlignment)"
       UseAssemblyStore="$(AndroidUseAssemblyStore)"
-      CompressedAssembliesDir="$(_AndroidCompressedAssembliesDir)">
+      CompressedAssembliesDir="$(_AndroidCompressedAssembliesDir)"
+      AssemblyStoreEmbeddedInRuntime="$(_AndroidEmbedAssemblyStoreInRuntime)">
     <Output TaskParameter="OutputFiles" ItemName="BaseZipFile" />
   </BuildBaseAppBundle>
   <BuildAppBundle

src/native/monodroid/embedded-assemblies-zip.cc

@@ -157,6 +157,35 @@ EmbeddedAssemblies::zip_load_individual_assembly_entries (std::vector<uint8_t> c
 	}
 }
 
+
+[[gnu::always_inline]] void
+EmbeddedAssemblies::verify_assembly_store_and_set_info (void *data_start, const char *name) noexcept
+{
+	auto header = static_cast<AssemblyStoreHeader*>(data_start);
+
+	if (header->magic != ASSEMBLY_STORE_MAGIC) {
+		log_fatal (LOG_ASSEMBLY, "Assembly store '%s' is not a valid .NET for Android assembly store file", name);
+		Helpers::abort_application ();
+	}
+
+	if (header->version != ASSEMBLY_STORE_FORMAT_VERSION) {
+		log_fatal (LOG_ASSEMBLY, "Assembly store '%s' uses format version 0x%x, instead of the expected 0x%x", name, header->version, ASSEMBLY_STORE_FORMAT_VERSION);
+		Helpers::abort_application ();
+	}
+
+	constexpr size_t header_size = sizeof(AssemblyStoreHeader);
+
+	assembly_store.data_start = static_cast<uint8_t*>(data_start);
+	assembly_store.assembly_count = header->entry_count;
+	assembly_store.index_entry_count = header->index_entry_count;
+	assembly_store.assemblies = reinterpret_cast<AssemblyStoreEntryDescriptor*>(assembly_store.data_start + header_size + header->index_size);
+	assembly_store_hashes = reinterpret_cast<AssemblyStoreIndexEntry*>(assembly_store.data_start + header_size);
+
+	number_of_found_assemblies += assembly_store.assembly_count;
+	number_of_mapped_assembly_stores++;
+	have_and_want_debug_symbols = register_debug_symbols;
+}
+
 inline void
 EmbeddedAssemblies::map_assembly_store (dynamic_local_string<SENSIBLE_PATH_MAX> const& entry_name, ZipEntryLoadState &state) noexcept
 {
@@ -189,29 +218,7 @@ EmbeddedAssemblies::map_assembly_store (dynamic_local_string<SENSIBLE_PATH_MAX>
 
 	auto [payload_start, payload_size] = get_wrapper_dso_payload_pointer_and_size (assembly_store_map, entry_name.get ());
 	log_debug (LOG_ASSEMBLY, "Adjusted assembly store pointer: %p; size: %zu", payload_start, payload_size);
-	auto header = static_cast<AssemblyStoreHeader*>(payload_start);
-
-	if (header->magic != ASSEMBLY_STORE_MAGIC) {
-		log_fatal (LOG_ASSEMBLY, "Assembly store '%s' is not a valid .NET for Android assembly store file", entry_name.get ());
-		Helpers::abort_application ();
-	}
-
-	if (header->version != ASSEMBLY_STORE_FORMAT_VERSION) {
-		log_fatal (LOG_ASSEMBLY, "Assembly store '%s' uses format version 0x%x, instead of the expected 0x%x", entry_name.get (), header->version, ASSEMBLY_STORE_FORMAT_VERSION);
-		Helpers::abort_application ();
-	}
-
-	constexpr size_t header_size = sizeof(AssemblyStoreHeader);
-
-	assembly_store.data_start = static_cast<uint8_t*>(payload_start);
-	assembly_store.assembly_count = header->entry_count;
-	assembly_store.index_entry_count = header->index_entry_count;
-	assembly_store.assemblies = reinterpret_cast<AssemblyStoreEntryDescriptor*>(assembly_store.data_start + header_size + header->index_size);
-	assembly_store_hashes = reinterpret_cast<AssemblyStoreIndexEntry*>(assembly_store.data_start + header_size);
-
-	number_of_found_assemblies += assembly_store.assembly_count;
-	number_of_mapped_assembly_stores++;
-	have_and_want_debug_symbols = register_debug_symbols;
+	verify_assembly_store_and_set_info (payload_start, entry_name.get ());
 }
 
 force_inline void
@@ -222,9 +229,15 @@ EmbeddedAssemblies::zip_load_assembly_store_entries (std::vector<uint8_t> const&
 	}
 
 	dynamic_local_string<SENSIBLE_PATH_MAX> entry_name;
-	bool assembly_store_found = false;
+	bool assembly_store_found = embedded_assembly_store_size != 0;
+	if (assembly_store_found) {
+		log_debug (LOG_ASSEMBLY, "Got embedded assembly store, size %zu", embedded_assembly_store_size);
+		verify_assembly_store_and_set_info (embedded_assembly_store, "embedded");
+		log_debug (LOG_ASSEMBLY, "Looking for DSOs in APK");
+	} else {
+		log_debug (LOG_ASSEMBLY, "Looking for assembly store ('%s') and DSOs in APK", assembly_store_file_path.data ());
+	}
 
-	log_debug (LOG_ASSEMBLY, "Looking for assembly stores in APK ('%s)", assembly_store_file_path.data ());
 	for (size_t i = 0; i < num_entries; i++) {
 		if (all_required_zip_entries_found ()) {
 			need_to_scan_more_apks = false;

src/native/monodroid/embedded-assemblies.hh

@@ -353,6 +353,8 @@ namespace xamarin::android::internal {
 		void set_entry_data (XamarinAndroidBundledAssembly &entry, ZipEntryLoadState const& state, dynamic_local_string<SENSIBLE_PATH_MAX> const& entry_name) noexcept;
 		void set_assembly_entry_data (XamarinAndroidBundledAssembly &entry, ZipEntryLoadState const& state, dynamic_local_string<SENSIBLE_PATH_MAX> const& entry_name) noexcept;
 		void set_debug_entry_data (XamarinAndroidBundledAssembly &entry, ZipEntryLoadState const& state, dynamic_local_string<SENSIBLE_PATH_MAX> const& entry_name) noexcept;
+
+		void verify_assembly_store_and_set_info (void *data_start, const char *name) noexcept;
 		void map_assembly_store (dynamic_local_string<SENSIBLE_PATH_MAX> const& entry_name, ZipEntryLoadState &state) noexcept;
 		const AssemblyStoreIndexEntry* find_assembly_store_entry (hash_t hash, const AssemblyStoreIndexEntry *entries, size_t entry_count) noexcept;
 		void store_individual_assembly_data (dynamic_local_string<SENSIBLE_PATH_MAX> const& entry_name, ZipEntryLoadState const& state, monodroid_should_register should_register) noexcept;

src/native/xamarin-app-stub/application_dso_stub.cc

@@ -306,3 +306,6 @@ const JniRemappingTypeReplacementEntry jni_remapping_type_replacements[] = {
 
 size_t embedded_runtime_config_size = 0;
 uint8_t embedded_runtime_config[0];
+
+size_t embedded_assembly_store_size = 0;
+uint8_t embedded_assembly_store[0];

src/native/xamarin-app-stub/xamarin-app.hh

@@ -398,4 +398,7 @@ MONO_API MONO_API_EXPORT void xamarin_app_init (JNIEnv *env, get_function_pointe
 
 MONO_API MONO_API_EXPORT size_t embedded_runtime_config_size;
 MONO_API MONO_API_EXPORT uint8_t embedded_runtime_config[];
+
+MONO_API MONO_API_EXPORT size_t embedded_assembly_store_size;
+MONO_API MONO_API_EXPORT uint8_t embedded_assembly_store[];
 #endif // __XAMARIN_ANDROID_TYPEMAP_H