runtime/class_linker-inl.h - platform/art - Gitiles

 /*
  * Copyright (C) 2011 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 ART_RUNTIME_CLASS_LINKER_INL_H_
 #define ART_RUNTIME_CLASS_LINKER_INL_H_

 #include "class_linker.h"
 #include "mirror/art_field.h"
 #include "mirror/class_loader.h"
 #include "mirror/dex_cache.h"
 #include "mirror/iftable.h"
 #include "mirror/object_array.h"
 #include "object_utils.h"
 #include "sirt_ref-inl.h"

 namespace art {

 inline bool ClassLinker::IsInBootClassPath(const char* descriptor) {
   DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_);
   return pair.second != nullptr;
 }

 inline mirror::Class* ClassLinker::FindSystemClass(Thread* self, const char* descriptor) {
   SirtRef<mirror::ClassLoader> class_loader(self, nullptr);
   return FindClass(self, descriptor, class_loader);
 }

 inline mirror::Class* ClassLinker::FindArrayClass(Thread* self, mirror::Class* element_class) {
   for (size_t i = 0; i < kFindArrayCacheSize; ++i) {
     // Read the cached array class once to avoid races with other threads setting it.
     mirror::Class* array_class = find_array_class_cache_[i];
     if (array_class != nullptr && array_class->GetComponentType() == element_class) {
       return array_class;
     }
   }
   DCHECK(!element_class->IsPrimitiveVoid());
   std::string descriptor("[");
   descriptor += ClassHelper(element_class).GetDescriptor();
   SirtRef<mirror::ClassLoader> class_loader(self, element_class->GetClassLoader());
   mirror::Class* array_class = FindClass(self, descriptor.c_str(), class_loader);
   // Benign races in storing array class and incrementing index.
   size_t victim_index = find_array_class_cache_next_victim_;
   find_array_class_cache_[victim_index] = array_class;
   find_array_class_cache_next_victim_ = (victim_index + 1) % kFindArrayCacheSize;
   return array_class;
 }

 inline mirror::String* ClassLinker::ResolveString(uint32_t string_idx,
                                                   mirror::ArtMethod* referrer) {
   mirror::String* resolved_string = referrer->GetDexCacheStrings()->Get(string_idx);
   if (UNLIKELY(resolved_string == NULL)) {
     mirror::Class* declaring_class = referrer->GetDeclaringClass();
     SirtRef<mirror::DexCache> dex_cache(Thread::Current(), declaring_class->GetDexCache());
     const DexFile& dex_file = *dex_cache->GetDexFile();
     resolved_string = ResolveString(dex_file, string_idx, dex_cache);
   }
   return resolved_string;
 }

 inline mirror::Class* ClassLinker::ResolveType(uint16_t type_idx,
                                                mirror::ArtMethod* referrer) {
   mirror::Class* resolved_type = referrer->GetDexCacheResolvedTypes()->Get(type_idx);
   if (UNLIKELY(resolved_type == NULL)) {
     mirror::Class* declaring_class = referrer->GetDeclaringClass();
     Thread* self = Thread::Current();
     SirtRef<mirror::DexCache> dex_cache(self, declaring_class->GetDexCache());
     SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
     const DexFile& dex_file = *dex_cache->GetDexFile();
     resolved_type = ResolveType(dex_file, type_idx, dex_cache, class_loader);
   }
   return resolved_type;
 }

 inline mirror::Class* ClassLinker::ResolveType(uint16_t type_idx, mirror::ArtField* referrer) {
   mirror::Class* declaring_class = referrer->GetDeclaringClass();
   mirror::DexCache* dex_cache_ptr = declaring_class->GetDexCache();
   mirror::Class* resolved_type = dex_cache_ptr->GetResolvedType(type_idx);
   if (UNLIKELY(resolved_type == NULL)) {
     Thread* self = Thread::Current();
     SirtRef<mirror::DexCache> dex_cache(self, dex_cache_ptr);
     SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
     const DexFile& dex_file = *dex_cache->GetDexFile();
     resolved_type = ResolveType(dex_file, type_idx, dex_cache, class_loader);
   }
   return resolved_type;
 }

 inline mirror::ArtMethod* ClassLinker::ResolveMethod(uint32_t method_idx,
                                                      mirror::ArtMethod* referrer,
                                                      InvokeType type) {
   mirror::ArtMethod* resolved_method =
       referrer->GetDexCacheResolvedMethods()->Get(method_idx);
   if (UNLIKELY(resolved_method == NULL || resolved_method->IsRuntimeMethod())) {
     mirror::Class* declaring_class = referrer->GetDeclaringClass();
     Thread* self = Thread::Current();
     SirtRef<mirror::DexCache> dex_cache(self, declaring_class->GetDexCache());
     SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
     const DexFile& dex_file = *dex_cache->GetDexFile();
     resolved_method = ResolveMethod(dex_file, method_idx, dex_cache, class_loader, referrer, type);
   }
   return resolved_method;
 }

 inline mirror::ArtField* ClassLinker::ResolveField(uint32_t field_idx,
                                                    mirror::ArtMethod* referrer,
                                                    bool is_static) {
   mirror::Class* declaring_class = referrer->GetDeclaringClass();
   mirror::ArtField* resolved_field =
       declaring_class->GetDexCache()->GetResolvedField(field_idx);
   if (UNLIKELY(resolved_field == NULL)) {
     Thread* self = Thread::Current();
     SirtRef<mirror::DexCache>  dex_cache(self, declaring_class->GetDexCache());
     SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
     const DexFile& dex_file = *dex_cache->GetDexFile();
     resolved_field = ResolveField(dex_file, field_idx, dex_cache, class_loader, is_static);
   }
   return resolved_field;
 }

 template <class T>
 inline mirror::ObjectArray<T>* ClassLinker::AllocObjectArray(Thread* self, size_t length) {
   return mirror::ObjectArray<T>::Alloc(self, GetClassRoot(kObjectArrayClass), length);
 }

 inline mirror::ObjectArray<mirror::Class>* ClassLinker::AllocClassArray(Thread* self,
                                                                         size_t length) {
   return mirror::ObjectArray<mirror::Class>::Alloc(self, GetClassRoot(kClassArrayClass), length);
 }

 inline mirror::ObjectArray<mirror::String>* ClassLinker::AllocStringArray(Thread* self,
                                                                           size_t length) {
   return mirror::ObjectArray<mirror::String>::Alloc(self, GetClassRoot(kJavaLangStringArrayClass),
                                                     length);
 }

 inline mirror::ObjectArray<mirror::ArtMethod>* ClassLinker::AllocArtMethodArray(Thread* self,
                                                                                 size_t length) {
   return mirror::ObjectArray<mirror::ArtMethod>::Alloc(self,
       GetClassRoot(kJavaLangReflectArtMethodArrayClass), length);
 }

 inline mirror::IfTable* ClassLinker::AllocIfTable(Thread* self, size_t ifcount) {
   return down_cast<mirror::IfTable*>(
       mirror::IfTable::Alloc(self, GetClassRoot(kObjectArrayClass), ifcount * mirror::IfTable::kMax));
 }

 inline mirror::ObjectArray<mirror::ArtField>* ClassLinker::AllocArtFieldArray(Thread* self,
                                                                               size_t length) {
   return mirror::ObjectArray<mirror::ArtField>::Alloc(self,
                                                       GetClassRoot(kJavaLangReflectArtFieldArrayClass),
                                                       length);
 }

 inline mirror::Class* ClassLinker::GetClassRoot(ClassRoot class_root)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(class_roots_ != NULL);
   mirror::Class* klass = class_roots_->Get(class_root);
   DCHECK(klass != NULL);
   return klass;
 }

 }  // namespace art

 #endif  // ART_RUNTIME_CLASS_LINKER_INL_H_
	/*
	* Copyright (C) 2011 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 ART_RUNTIME_CLASS_LINKER_INL_H_
	#define ART_RUNTIME_CLASS_LINKER_INL_H_

	#include "class_linker.h"
	#include "mirror/art_field.h"
	#include "mirror/class_loader.h"
	#include "mirror/dex_cache.h"
	#include "mirror/iftable.h"
	#include "mirror/object_array.h"
	#include "object_utils.h"
	#include "sirt_ref-inl.h"

	namespace art {

	inline bool ClassLinker::IsInBootClassPath(const char* descriptor) {
	DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_);
	return pair.second != nullptr;
	}

	inline mirror::Class* ClassLinker::FindSystemClass(Thread* self, const char* descriptor) {
	SirtRef<mirror::ClassLoader> class_loader(self, nullptr);
	return FindClass(self, descriptor, class_loader);
	}

	inline mirror::Class* ClassLinker::FindArrayClass(Thread* self, mirror::Class* element_class) {
	for (size_t i = 0; i < kFindArrayCacheSize; ++i) {
	// Read the cached array class once to avoid races with other threads setting it.
	mirror::Class* array_class = find_array_class_cache_[i];
	if (array_class != nullptr && array_class->GetComponentType() == element_class) {
	return array_class;
	}
	}
	DCHECK(!element_class->IsPrimitiveVoid());
	std::string descriptor("[");
	descriptor += ClassHelper(element_class).GetDescriptor();
	SirtRef<mirror::ClassLoader> class_loader(self, element_class->GetClassLoader());
	mirror::Class* array_class = FindClass(self, descriptor.c_str(), class_loader);
	// Benign races in storing array class and incrementing index.
	size_t victim_index = find_array_class_cache_next_victim_;
	find_array_class_cache_[victim_index] = array_class;
	find_array_class_cache_next_victim_ = (victim_index + 1) % kFindArrayCacheSize;
	return array_class;
	}

	inline mirror::String* ClassLinker::ResolveString(uint32_t string_idx,
	mirror::ArtMethod* referrer) {
	mirror::String* resolved_string = referrer->GetDexCacheStrings()->Get(string_idx);
	if (UNLIKELY(resolved_string == NULL)) {
	mirror::Class* declaring_class = referrer->GetDeclaringClass();
	SirtRef<mirror::DexCache> dex_cache(Thread::Current(), declaring_class->GetDexCache());
	const DexFile& dex_file = *dex_cache->GetDexFile();
	resolved_string = ResolveString(dex_file, string_idx, dex_cache);
	}
	return resolved_string;
	}

	inline mirror::Class* ClassLinker::ResolveType(uint16_t type_idx,
	mirror::ArtMethod* referrer) {
	mirror::Class* resolved_type = referrer->GetDexCacheResolvedTypes()->Get(type_idx);
	if (UNLIKELY(resolved_type == NULL)) {
	mirror::Class* declaring_class = referrer->GetDeclaringClass();
	Thread* self = Thread::Current();
	SirtRef<mirror::DexCache> dex_cache(self, declaring_class->GetDexCache());
	SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
	const DexFile& dex_file = *dex_cache->GetDexFile();
	resolved_type = ResolveType(dex_file, type_idx, dex_cache, class_loader);
	}
	return resolved_type;
	}

	inline mirror::Class* ClassLinker::ResolveType(uint16_t type_idx, mirror::ArtField* referrer) {
	mirror::Class* declaring_class = referrer->GetDeclaringClass();
	mirror::DexCache* dex_cache_ptr = declaring_class->GetDexCache();
	mirror::Class* resolved_type = dex_cache_ptr->GetResolvedType(type_idx);
	if (UNLIKELY(resolved_type == NULL)) {
	Thread* self = Thread::Current();
	SirtRef<mirror::DexCache> dex_cache(self, dex_cache_ptr);
	SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
	const DexFile& dex_file = *dex_cache->GetDexFile();
	resolved_type = ResolveType(dex_file, type_idx, dex_cache, class_loader);
	}
	return resolved_type;
	}

	inline mirror::ArtMethod* ClassLinker::ResolveMethod(uint32_t method_idx,
	mirror::ArtMethod* referrer,
	InvokeType type) {
	mirror::ArtMethod* resolved_method =
	referrer->GetDexCacheResolvedMethods()->Get(method_idx);
	if (UNLIKELY(resolved_method == NULL \|\| resolved_method->IsRuntimeMethod())) {
	mirror::Class* declaring_class = referrer->GetDeclaringClass();
	Thread* self = Thread::Current();
	SirtRef<mirror::DexCache> dex_cache(self, declaring_class->GetDexCache());
	SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
	const DexFile& dex_file = *dex_cache->GetDexFile();
	resolved_method = ResolveMethod(dex_file, method_idx, dex_cache, class_loader, referrer, type);
	}
	return resolved_method;
	}

	inline mirror::ArtField* ClassLinker::ResolveField(uint32_t field_idx,
	mirror::ArtMethod* referrer,
	bool is_static) {
	mirror::Class* declaring_class = referrer->GetDeclaringClass();
	mirror::ArtField* resolved_field =
	declaring_class->GetDexCache()->GetResolvedField(field_idx);
	if (UNLIKELY(resolved_field == NULL)) {
	Thread* self = Thread::Current();
	SirtRef<mirror::DexCache> dex_cache(self, declaring_class->GetDexCache());
	SirtRef<mirror::ClassLoader> class_loader(self, declaring_class->GetClassLoader());
	const DexFile& dex_file = *dex_cache->GetDexFile();
	resolved_field = ResolveField(dex_file, field_idx, dex_cache, class_loader, is_static);
	}
	return resolved_field;
	}

	template <class T>
	inline mirror::ObjectArray<T>* ClassLinker::AllocObjectArray(Thread* self, size_t length) {
	return mirror::ObjectArray<T>::Alloc(self, GetClassRoot(kObjectArrayClass), length);
	}

	inline mirror::ObjectArray<mirror::Class>* ClassLinker::AllocClassArray(Thread* self,
	size_t length) {
	return mirror::ObjectArray<mirror::Class>::Alloc(self, GetClassRoot(kClassArrayClass), length);
	}

	inline mirror::ObjectArray<mirror::String>* ClassLinker::AllocStringArray(Thread* self,
	size_t length) {
	return mirror::ObjectArray<mirror::String>::Alloc(self, GetClassRoot(kJavaLangStringArrayClass),
	length);
	}

	inline mirror::ObjectArray<mirror::ArtMethod>* ClassLinker::AllocArtMethodArray(Thread* self,
	size_t length) {
	return mirror::ObjectArray<mirror::ArtMethod>::Alloc(self,
	GetClassRoot(kJavaLangReflectArtMethodArrayClass), length);
	}

	inline mirror::IfTable* ClassLinker::AllocIfTable(Thread* self, size_t ifcount) {
	return down_cast<mirror::IfTable*>(
	mirror::IfTable::Alloc(self, GetClassRoot(kObjectArrayClass), ifcount * mirror::IfTable::kMax));
	}

	inline mirror::ObjectArray<mirror::ArtField>* ClassLinker::AllocArtFieldArray(Thread* self,
	size_t length) {
	return mirror::ObjectArray<mirror::ArtField>::Alloc(self,
	GetClassRoot(kJavaLangReflectArtFieldArrayClass),
	length);
	}

	inline mirror::Class* ClassLinker::GetClassRoot(ClassRoot class_root)
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(class_roots_ != NULL);
	mirror::Class* klass = class_roots_->Get(class_root);
	DCHECK(klass != NULL);
	return klass;
	}

	} // namespace art

	#endif // ART_RUNTIME_CLASS_LINKER_INL_H_