Revert "Assign shared libraries stable package ids"

This change must be reverted because it broke packages with the same
package name but different package ids loaded at once.

Bug: 146685730
Test: MultiSplitInstallTest
This reverts commit fe50d739f75e13ebf64c010bf6ef504bcc81d860.

Change-Id: If6364fd660c76284452f77e7d4f09a3df9dede1d

7 files changed, 20 insertions, 164 deletions

diff --git a/libs/androidfw/Android.bp b/libs/androidfw/Android.bp
index f87f98a59a12..02c85aa34f4b 100644
--- a/libs/androidfw/Android.bp
+++ b/libs/androidfw/Android.bp
@@ -44,7 +44,6 @@ cc_library {
         "AttributeResolution.cpp",
         "ChunkIterator.cpp",
         "ConfigDescription.cpp",
-        "DynamicLibManager.cpp",
         "Idmap.cpp",
         "LoadedArsc.cpp",
         "Locale.cpp",
diff --git a/libs/androidfw/AssetManager2.cpp b/libs/androidfw/AssetManager2.cpp
index f20e18453f8b..803828fc16c5 100644
--- a/libs/androidfw/AssetManager2.cpp
+++ b/libs/androidfw/AssetManager2.cpp
@@ -25,7 +25,6 @@
 
 #include "android-base/logging.h"
 #include "android-base/stringprintf.h"
-#include "androidfw/DynamicLibManager.h"
 #include "androidfw/ResourceUtils.h"
 #include "androidfw/Util.h"
 #include "utils/ByteOrder.h"
@@ -67,12 +66,7 @@ struct FindEntryResult {
   StringPoolRef entry_string_ref;
 };
 
-AssetManager2::AssetManager2() : dynamic_lib_manager_(std::make_unique<DynamicLibManager>()) {
-  memset(&configuration_, 0, sizeof(configuration_));
-}
-
-AssetManager2::AssetManager2(DynamicLibManager* dynamic_lib_manager)
-    : dynamic_lib_manager_(dynamic_lib_manager) {
+AssetManager2::AssetManager2() {
   memset(&configuration_, 0, sizeof(configuration_));
 }
 
@@ -91,44 +85,24 @@ void AssetManager2::BuildDynamicRefTable() {
   package_groups_.clear();
   package_ids_.fill(0xff);
 
-  // Overlay resources are not directly referenced by an application so their resource ids
-  // can change throughout the application's lifetime. Assign overlay package ids last.
-  std::vector<const ApkAssets*> sorted_apk_assets(apk_assets_);
-  std::stable_partition(sorted_apk_assets.begin(), sorted_apk_assets.end(), [](const ApkAssets* a) {
-    return !a->IsOverlay();
-  });
-
+  // A mapping from apk assets path to the runtime package id of its first loaded package.
   std::unordered_map<std::string, uint8_t> apk_assets_package_ids;
-  std::unordered_map<std::string, uint8_t> package_name_package_ids;
-
-  // Assign stable package ids to application packages.
-  uint8_t next_available_package_id = 0U;
-  for (const auto& apk_assets : sorted_apk_assets) {
-    for (const auto& package : apk_assets->GetLoadedArsc()->GetPackages()) {
-      uint8_t package_id = package->GetPackageId();
-      if (package->IsOverlay()) {
-        package_id = GetDynamicLibManager()->FindUnassignedId(next_available_package_id);
-        next_available_package_id = package_id + 1;
-      } else if (package->IsDynamic()) {
-        package_id = GetDynamicLibManager()->GetAssignedId(package->GetPackageName());
-      }
-
-      // Map the path of the apk assets to the package id of its first loaded package.
-      apk_assets_package_ids[apk_assets->GetPath()] = package_id;
 
-      // Map the package name of the package to the first loaded package with that package id.
-      package_name_package_ids[package->GetPackageName()] = package_id;
-    }
-  }
+  // 0x01 is reserved for the android package.
+  int next_package_id = 0x02;
+  const size_t apk_assets_count = apk_assets_.size();
+  for (size_t i = 0; i < apk_assets_count; i++) {
+    const ApkAssets* apk_assets = apk_assets_[i];
+    const LoadedArsc* loaded_arsc = apk_assets->GetLoadedArsc();
 
-  const int apk_assets_count = apk_assets_.size();
-  for (int i = 0; i < apk_assets_count; i++) {
-    const auto& apk_assets = apk_assets_[i];
-    for (const auto& package : apk_assets->GetLoadedArsc()->GetPackages()) {
-      const auto package_id_entry = package_name_package_ids.find(package->GetPackageName());
-      CHECK(package_id_entry != package_name_package_ids.end())
-          << "no package id assgined to package " << package->GetPackageName();
-      const uint8_t package_id = package_id_entry->second;
+    for (const std::unique_ptr<const LoadedPackage>& package : loaded_arsc->GetPackages()) {
+      // Get the package ID or assign one if a shared library.
+      int package_id;
+      if (package->IsDynamic()) {
+        package_id = next_package_id++;
+      } else {
+        package_id = package->GetPackageId();
+      }
 
       // Add the mapping for package ID to index if not present.
       uint8_t idx = package_ids_[package_id];
@@ -152,7 +126,7 @@ void AssetManager2::BuildDynamicRefTable() {
 
             PackageGroup& target_package_group = package_groups_[target_idx];
 
-            // Create a special dynamic reference table for the overlay to rewrite references to
+            // Create a special dynamic reference table for the overlay to rewite references to
             // overlay resources as references to the target resources they overlay.
             auto overlay_table = std::make_shared<OverlayDynamicRefTable>(
                 loaded_idmap->GetOverlayDynamicRefTable(target_package_id));
@@ -182,6 +156,8 @@ void AssetManager2::BuildDynamicRefTable() {
         package_group->dynamic_ref_table->mEntries.replaceValueFor(
             package_name, static_cast<uint8_t>(entry.package_id));
       }
+
+      apk_assets_package_ids.insert(std::make_pair(apk_assets->GetPath(), package_id));
     }
   }
 
@@ -1329,16 +1305,6 @@ uint8_t AssetManager2::GetAssignedPackageId(const LoadedPackage* package) const
   return 0;
 }
 
-DynamicLibManager* AssetManager2::GetDynamicLibManager() const {
-  auto dynamic_lib_manager =
-      std::get_if<std::unique_ptr<DynamicLibManager>>(&dynamic_lib_manager_);
-  if (dynamic_lib_manager) {
-    return (*dynamic_lib_manager).get();
-  } else {
-    return *std::get_if<DynamicLibManager*>(&dynamic_lib_manager_);
-  }
-}
-
 std::unique_ptr<Theme> AssetManager2::NewTheme() {
   return std::unique_ptr<Theme>(new Theme(this));
 }
diff --git a/libs/androidfw/DynamicLibManager.cpp b/libs/androidfw/DynamicLibManager.cpp
deleted file mode 100644
index 895b7695bf26..000000000000
--- a/libs/androidfw/DynamicLibManager.cpp
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * 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.
- */
-
-#include "androidfw/DynamicLibManager.h"
-
-namespace android {
-
-uint8_t DynamicLibManager::GetAssignedId(const std::string& library_package_name) {
-  auto lib_entry = shared_lib_package_ids_.find(library_package_name);
-  if (lib_entry != shared_lib_package_ids_.end()) {
-    return lib_entry->second;
-  }
-
-  return shared_lib_package_ids_[library_package_name] = next_package_id_++;
-}
-
-uint8_t DynamicLibManager::FindUnassignedId(uint8_t start_package_id) {
-  return (start_package_id < next_package_id_) ? next_package_id_ : start_package_id;
-}
-
-} // namespace android
diff --git a/libs/androidfw/include/androidfw/AssetManager2.h b/libs/androidfw/include/androidfw/AssetManager2.h
index b2cec2a42994..00cbbcad56e6 100644
--- a/libs/androidfw/include/androidfw/AssetManager2.h
+++ b/libs/androidfw/include/androidfw/AssetManager2.h
@@ -27,7 +27,6 @@
 #include "androidfw/ApkAssets.h"
 #include "androidfw/Asset.h"
 #include "androidfw/AssetManager.h"
-#include "androidfw/DynamicLibManager.h"
 #include "androidfw/ResourceTypes.h"
 #include "androidfw/Util.h"
 
@@ -95,7 +94,6 @@ class AssetManager2 {
   };
 
   AssetManager2();
-  explicit AssetManager2(DynamicLibManager* dynamic_lib_manager);
 
   // Sets/resets the underlying ApkAssets for this AssetManager. The ApkAssets
   // are not owned by the AssetManager, and must have a longer lifetime.
@@ -373,8 +371,6 @@ class AssetManager2 {
   // Retrieve the assigned package id of the package if loaded into this AssetManager
   uint8_t GetAssignedPackageId(const LoadedPackage* package) const;
 
-  DynamicLibManager* GetDynamicLibManager() const;
-
   // The ordered list of ApkAssets to search. These are not owned by the AssetManager, and must
   // have a longer lifetime.
   std::vector<const ApkAssets*> apk_assets_;
@@ -393,9 +389,6 @@ class AssetManager2 {
   // may need to be purged.
   ResTable_config configuration_;
 
-  // Component responsible for assigning package ids to shared libraries.
-  std::variant<std::unique_ptr<DynamicLibManager>, DynamicLibManager*> dynamic_lib_manager_;
-
   // Cached set of bags. These are cached because they can inherit keys from parent bags,
   // which involves some calculation.
   std::unordered_map<uint32_t, util::unique_cptr<ResolvedBag>> cached_bags_;
diff --git a/libs/androidfw/include/androidfw/DynamicLibManager.h b/libs/androidfw/include/androidfw/DynamicLibManager.h
deleted file mode 100644
index 1ff7079573d2..000000000000
--- a/libs/androidfw/include/androidfw/DynamicLibManager.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * 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.
- */
-
-#ifndef ANDROIDFW_DYNAMICLIBMANAGER_H
-#define ANDROIDFW_DYNAMICLIBMANAGER_H
-
-#include <string>
-#include <unordered_map>
-
-#include "android-base/macros.h"
-
-namespace android {
-
-// Manages assigning resource ids for dynamic resources.
-class DynamicLibManager {
- public:
-  DynamicLibManager() = default;
-
-  // Retrieves the assigned package id for the library.
-  uint8_t GetAssignedId(const std::string& library_package_name);
-
-  // Queries in ascending order for the first available package id that is not currently assigned to
-  // a library.
-  uint8_t FindUnassignedId(uint8_t start_package_id);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DynamicLibManager);
-
-  uint8_t next_package_id_ = 0x02;
-  std::unordered_map<std::string, uint8_t> shared_lib_package_ids_;
-};
-
-} // namespace android
-
-#endif //ANDROIDFW_DYNAMICLIBMANAGER_H
diff --git a/libs/androidfw/include/androidfw/MutexGuard.h b/libs/androidfw/include/androidfw/MutexGuard.h
index 8891512958f0..64924f433245 100644
--- a/libs/androidfw/include/androidfw/MutexGuard.h
+++ b/libs/androidfw/include/androidfw/MutexGuard.h
@@ -47,8 +47,7 @@ class Guarded {
   static_assert(!std::is_pointer<T>::value, "T must not be a raw pointer");
 
  public:
-  template <typename ...Args>
-  explicit Guarded(Args&& ...args) : guarded_(std::forward<Args>(args)...) {
+  explicit Guarded() : guarded_() {
   }
 
   template <typename U = T>
diff --git a/libs/androidfw/tests/AssetManager2_test.cpp b/libs/androidfw/tests/AssetManager2_test.cpp
index ac32699c6dfd..6054fa3338bd 100644
--- a/libs/androidfw/tests/AssetManager2_test.cpp
+++ b/libs/androidfw/tests/AssetManager2_test.cpp
@@ -216,25 +216,6 @@ TEST_F(AssetManager2Test, FindsResourceFromAppLoadedAsSharedLibrary) {
   EXPECT_EQ(fix_package_id(appaslib::R::array::integerArray1, 0x02), value.data);
 }
 
-TEST_F(AssetManager2Test, AssignsUnchangingPackageIdToSharedLibrary) {
-  DynamicLibManager lib_manager;
-  AssetManager2 assetmanager(&lib_manager);
-  assetmanager.SetApkAssets(
-      {lib_one_assets_.get(), lib_two_assets_.get(), libclient_assets_.get()});
-
-  AssetManager2 assetmanager2(&lib_manager);
-  assetmanager2.SetApkAssets(
-      {lib_two_assets_.get(), lib_one_assets_.get(), libclient_assets_.get()});
-
-  uint32_t res_id = assetmanager.GetResourceId("com.android.lib_one:string/foo");
-  ASSERT_NE(0U, res_id);
-
-  uint32_t res_id_2 = assetmanager2.GetResourceId("com.android.lib_one:string/foo");
-  ASSERT_NE(0U, res_id_2);
-
-  ASSERT_EQ(res_id, res_id_2);
-}
-
 TEST_F(AssetManager2Test, GetSharedLibraryResourceName) {
   AssetManager2 assetmanager;
   assetmanager.SetApkAssets({lib_one_assets_.get()});