Add support to place shared libraries after the dex path

This allows for a shared library to overriden by content in the dex path

Bug: 179429740

Test: m test-art-host-gtest-art_runtime_tests32

Change-Id: I5f69c7bf32b7bd389eff8bdbb21616ba89ed9e87

1 files changed, 23 insertions, 2 deletions

diff --git a/runtime/class_linker.h b/runtime/class_linker.h
index 8f334051ca..eaaf128527 100644
--- a/runtime/class_linker.h
+++ b/runtime/class_linker.h
@@ -665,7 +665,8 @@ class ClassLinker {
                                      const std::vector<const DexFile*>& dex_files,
                                      jclass loader_class,
                                      jobject parent_loader,
-                                     jobject shared_libraries = nullptr)
+                                     jobject shared_libraries = nullptr,
+                                     jobject shared_libraries_after = nullptr)
       REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Locks::dex_lock_);
 
@@ -683,7 +684,8 @@ class ClassLinker {
       const std::vector<const DexFile*>& dex_files,
       Handle<mirror::Class> loader_class,
       Handle<mirror::ClassLoader> parent_loader,
-      Handle<mirror::ObjectArray<mirror::ClassLoader>> shared_libraries)
+      Handle<mirror::ObjectArray<mirror::ClassLoader>> shared_libraries,
+      Handle<mirror::ObjectArray<mirror::ClassLoader>> shared_libraries_after)
           REQUIRES_SHARED(Locks::mutator_lock_)
           REQUIRES(!Locks::dex_lock_);
 
@@ -1015,6 +1017,25 @@ class ClassLinker {
       REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Locks::dex_lock_);
 
+  bool FindClassInSharedLibrariesHelper(ScopedObjectAccessAlreadyRunnable& soa,
+                                        Thread* self,
+                                        const char* descriptor,
+                                        size_t hash,
+                                        Handle<mirror::ClassLoader> class_loader,
+                                        ArtField* field,
+                                        /*out*/ ObjPtr<mirror::Class>* result)
+      REQUIRES_SHARED(Locks::mutator_lock_)
+      REQUIRES(!Locks::dex_lock_);
+
+  bool FindClassInSharedLibrariesAfter(ScopedObjectAccessAlreadyRunnable& soa,
+                                       Thread* self,
+                                       const char* descriptor,
+                                       size_t hash,
+                                       Handle<mirror::ClassLoader> class_loader,
+                                       /*out*/ ObjPtr<mirror::Class>* result)
+      REQUIRES_SHARED(Locks::mutator_lock_)
+      REQUIRES(!Locks::dex_lock_);
+
   // Finds the class in the classpath of the given class loader. It only searches the class loader
   // dex files and does not recurse into its parent.
   // The method checks that the provided class loader is either a PathClassLoader or a