upload android base code part3

android/art/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2012 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 "art_method-inl.h"
+#include "base/callee_save_type.h"
+#include "callee_save_frame.h"
+#include "entrypoints/entrypoint_utils-inl.h"
+#include "class_linker-inl.h"
+#include "class_table-inl.h"
+#include "dex_file-inl.h"
+#include "dex_file_types.h"
+#include "gc/heap.h"
+#include "mirror/class-inl.h"
+#include "mirror/class_loader.h"
+#include "mirror/object_array-inl.h"
+#include "mirror/object-inl.h"
+#include "oat_file.h"
+#include "runtime.h"
+
+namespace art {
+
+static inline void BssWriteBarrier(ArtMethod* outer_method) REQUIRES_SHARED(Locks::mutator_lock_) {
+  // For AOT code, we need a write barrier for the class loader that holds the
+  // GC roots in the .bss.
+  const DexFile* dex_file = outer_method->GetDexFile();
+  if (dex_file != nullptr &&
+      dex_file->GetOatDexFile() != nullptr &&
+      !dex_file->GetOatDexFile()->GetOatFile()->GetBssGcRoots().empty()) {
+    ObjPtr<mirror::ClassLoader> class_loader = outer_method->GetClassLoader();
+    if (kIsDebugBuild) {
+      ClassTable* class_table =
+          Runtime::Current()->GetClassLinker()->ClassTableForClassLoader(class_loader);
+      CHECK(class_table != nullptr &&
+            !class_table->InsertOatFile(dex_file->GetOatDexFile()->GetOatFile()))
+          << "Oat file with .bss GC roots was not registered in class table: "
+          << dex_file->GetOatDexFile()->GetOatFile()->GetLocation();
+    }
+    if (class_loader != nullptr) {
+      // Note that we emit the barrier before the compiled code stores the String or Class
+      // as a GC root. This is OK as there is no suspend point point in between.
+      Runtime::Current()->GetHeap()->WriteBarrierEveryFieldOf(class_loader);
+    } else {
+      Runtime::Current()->GetClassLinker()->WriteBarrierForBootOatFileBssRoots(
+          dex_file->GetOatDexFile()->GetOatFile());
+    }
+  }
+}
+
+extern "C" mirror::Class* artInitializeStaticStorageFromCode(uint32_t type_idx, Thread* self)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  // Called to ensure static storage base is initialized for direct static field reads and writes.
+  // A class may be accessing another class' fields when it doesn't have access, as access has been
+  // given by inheritance.
+  ScopedQuickEntrypointChecks sqec(self);
+  auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
+                                                                  CalleeSaveType::kSaveEverything);
+  ArtMethod* caller = caller_and_outer.caller;
+  mirror::Class* result =
+      ResolveVerifyAndClinit(dex::TypeIndex(type_idx), caller, self, true, false);
+  if (LIKELY(result != nullptr)) {
+    BssWriteBarrier(caller_and_outer.outer_method);
+  }
+  return result;
+}
+
+extern "C" mirror::Class* artInitializeTypeFromCode(uint32_t type_idx, Thread* self)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  // Called when method->dex_cache_resolved_types_[] misses.
+  ScopedQuickEntrypointChecks sqec(self);
+  auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
+                                                                  CalleeSaveType::kSaveEverything);
+  ArtMethod* caller = caller_and_outer.caller;
+  mirror::Class* result =
+      ResolveVerifyAndClinit(dex::TypeIndex(type_idx), caller, self, false, false);
+  if (LIKELY(result != nullptr)) {
+    BssWriteBarrier(caller_and_outer.outer_method);
+  }
+  return result;
+}
+
+extern "C" mirror::Class* artInitializeTypeAndVerifyAccessFromCode(uint32_t type_idx, Thread* self)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  // Called when caller isn't guaranteed to have access to a type and the dex cache may be
+  // unpopulated.
+  ScopedQuickEntrypointChecks sqec(self);
+  auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
+                                                                  CalleeSaveType::kSaveEverything);
+  ArtMethod* caller = caller_and_outer.caller;
+  mirror::Class* result =
+      ResolveVerifyAndClinit(dex::TypeIndex(type_idx), caller, self, false, true);
+  if (LIKELY(result != nullptr)) {
+    BssWriteBarrier(caller_and_outer.outer_method);
+  }
+  return result;
+}
+
+extern "C" mirror::String* artResolveStringFromCode(int32_t string_idx, Thread* self)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  ScopedQuickEntrypointChecks sqec(self);
+  auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
+                                                                  CalleeSaveType::kSaveEverything);
+  ArtMethod* caller = caller_and_outer.caller;
+  mirror::String* result = ResolveStringFromCode(caller, dex::StringIndex(string_idx));
+  if (LIKELY(result != nullptr)) {
+    BssWriteBarrier(caller_and_outer.outer_method);
+  }
+  return result;
+}
+
+}  // namespace art