Move libnative{bridge,loader} to art/

This change moves system/core/libnative{bridge,loader} under art/.

Bug: 137364733
Test: m
Change-Id: I9be7333d00fcd3f36cd80520e50a30ea840187ad

1 files changed, 73 insertions, 0 deletions

diff --git a/libnativeloader/native_loader_namespace.h b/libnativeloader/native_loader_namespace.h
new file mode 100644
index 0000000000..7200ee7961
--- /dev/null
+++ b/libnativeloader/native_loader_namespace.h
@@ -0,0 +1,73 @@
+/*
+ * 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.
+ */
+#pragma once
+#if defined(__ANDROID__)
+
+#include <string>
+#include <variant>
+#include <vector>
+
+#include <android-base/logging.h>
+#include <android-base/result.h>
+#include <android/dlext.h>
+#include <log/log.h>
+#include <nativebridge/native_bridge.h>
+
+namespace android {
+
+using android::base::Result;
+
+// NativeLoaderNamespace abstracts a linker namespace for the native
+// architecture (ex: arm on arm) or the translated architecture (ex: arm on
+// x86). Instances of this class are managed by LibraryNamespaces object.
+struct NativeLoaderNamespace {
+ public:
+  static Result<NativeLoaderNamespace> Create(const std::string& name,
+                                              const std::string& search_paths,
+                                              const std::string& permitted_paths,
+                                              const NativeLoaderNamespace* parent, bool is_shared,
+                                              bool is_greylist_enabled,
+                                              bool also_used_as_anonymous);
+
+  NativeLoaderNamespace(NativeLoaderNamespace&&) = default;
+  NativeLoaderNamespace(const NativeLoaderNamespace&) = default;
+  NativeLoaderNamespace& operator=(const NativeLoaderNamespace&) = default;
+
+  android_namespace_t* ToRawAndroidNamespace() const { return std::get<0>(raw_); }
+  native_bridge_namespace_t* ToRawNativeBridgeNamespace() const { return std::get<1>(raw_); }
+
+  std::string name() const { return name_; }
+  bool IsBridged() const { return raw_.index() == 1; }
+
+  Result<void> Link(const NativeLoaderNamespace& target, const std::string& shared_libs) const;
+  Result<void*> Load(const char* lib_name) const;
+
+  static Result<NativeLoaderNamespace> GetExportedNamespace(const std::string& name,
+                                                            bool is_bridged);
+  static Result<NativeLoaderNamespace> GetPlatformNamespace(bool is_bridged);
+
+ private:
+  explicit NativeLoaderNamespace(const std::string& name, android_namespace_t* ns)
+      : name_(name), raw_(ns) {}
+  explicit NativeLoaderNamespace(const std::string& name, native_bridge_namespace_t* ns)
+      : name_(name), raw_(ns) {}
+
+  std::string name_;
+  std::variant<android_namespace_t*, native_bridge_namespace_t*> raw_;
+};
+
+}  // namespace android
+#endif  // #if defined(__ANDROID__)