Elliott Hughes | 0f3c553 | 2012-03-30 14:51:51 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
buzbee | 5433072 | 2011-08-23 16:46:55 -0700 | [diff] [blame] | 16 | |
| 17 | #ifndef ART_SRC_RUNTIME_SUPPORT_H_ |
| 18 | #define ART_SRC_RUNTIME_SUPPORT_H_ |
| 19 | |
Shih-wei Liao | 2d83101 | 2011-09-28 22:06:53 -0700 | [diff] [blame] | 20 | #include "class_linker.h" |
Ian Rogers | 87e552d | 2012-08-31 15:54:48 -0700 | [diff] [blame] | 21 | #include "common_throws.h" |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 22 | #include "dex_file.h" |
Elliott Hughes | 0f3c553 | 2012-03-30 14:51:51 -0700 | [diff] [blame] | 23 | #include "invoke_type.h" |
Shih-wei Liao | 2d83101 | 2011-09-28 22:06:53 -0700 | [diff] [blame] | 24 | #include "object.h" |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 25 | #include "object_utils.h" |
| 26 | #include "thread.h" |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 27 | #include "verifier/method_verifier.h" |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 28 | |
| 29 | extern "C" void art_proxy_invoke_handler(); |
| 30 | extern "C" void art_work_around_app_jni_bugs(); |
Shih-wei Liao | 2d83101 | 2011-09-28 22:06:53 -0700 | [diff] [blame] | 31 | |
jeffhao | 41005dd | 2012-05-09 17:58:52 -0700 | [diff] [blame] | 32 | extern "C" double art_l2d(int64_t l); |
| 33 | extern "C" float art_l2f(int64_t l); |
| 34 | extern "C" int64_t art_d2l(double d); |
| 35 | extern "C" int32_t art_d2i(double d); |
| 36 | extern "C" int64_t art_f2l(float f); |
| 37 | extern "C" int32_t art_f2i(float f); |
| 38 | |
Shih-wei Liao | 2d83101 | 2011-09-28 22:06:53 -0700 | [diff] [blame] | 39 | namespace art { |
| 40 | |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 41 | class Array; |
| 42 | class Class; |
| 43 | class Field; |
| 44 | class Method; |
| 45 | class Object; |
| 46 | |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 47 | // Given the context of a calling Method, use its DexCache to resolve a type to a Class. If it |
| 48 | // cannot be resolved, throw an error. If it can, use it to create an instance. |
| 49 | // When verification/compiler hasn't been able to verify access, optionally perform an access |
| 50 | // check. |
| 51 | static inline Object* AllocObjectFromCode(uint32_t type_idx, Method* method, Thread* self, |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 52 | bool access_check) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 53 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 54 | Class* klass = method->GetDexCacheResolvedTypes()->Get(type_idx); |
| 55 | Runtime* runtime = Runtime::Current(); |
| 56 | if (UNLIKELY(klass == NULL)) { |
| 57 | klass = runtime->GetClassLinker()->ResolveType(type_idx, method); |
| 58 | if (klass == NULL) { |
| 59 | DCHECK(self->IsExceptionPending()); |
| 60 | return NULL; // Failure |
| 61 | } |
| 62 | } |
| 63 | if (access_check) { |
| 64 | if (UNLIKELY(!klass->IsInstantiable())) { |
| 65 | self->ThrowNewException("Ljava/lang/InstantiationError;", |
| 66 | PrettyDescriptor(klass).c_str()); |
| 67 | return NULL; // Failure |
| 68 | } |
| 69 | Class* referrer = method->GetDeclaringClass(); |
| 70 | if (UNLIKELY(!referrer->CanAccess(klass))) { |
Ian Rogers | 87e552d | 2012-08-31 15:54:48 -0700 | [diff] [blame] | 71 | ThrowIllegalAccessErrorClass(referrer, klass); |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 72 | return NULL; // Failure |
| 73 | } |
| 74 | } |
Ian Rogers | 0045a29 | 2012-03-31 21:08:41 -0700 | [diff] [blame] | 75 | if (!runtime->GetClassLinker()->EnsureInitialized(klass, true, true)) { |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 76 | DCHECK(self->IsExceptionPending()); |
| 77 | return NULL; // Failure |
| 78 | } |
| 79 | return klass->AllocObject(); |
| 80 | } |
| 81 | |
| 82 | // Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If |
| 83 | // it cannot be resolved, throw an error. If it can, use it to create an array. |
| 84 | // When verification/compiler hasn't been able to verify access, optionally perform an access |
| 85 | // check. |
| 86 | static inline Array* AllocArrayFromCode(uint32_t type_idx, Method* method, int32_t component_count, |
Ian Rogers | 87e552d | 2012-08-31 15:54:48 -0700 | [diff] [blame] | 87 | bool access_check) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 88 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 89 | if (UNLIKELY(component_count < 0)) { |
| 90 | Thread::Current()->ThrowNewExceptionF("Ljava/lang/NegativeArraySizeException;", "%d", |
| 91 | component_count); |
| 92 | return NULL; // Failure |
| 93 | } |
| 94 | Class* klass = method->GetDexCacheResolvedTypes()->Get(type_idx); |
| 95 | if (UNLIKELY(klass == NULL)) { // Not in dex cache so try to resolve |
| 96 | klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method); |
| 97 | if (klass == NULL) { // Error |
| 98 | DCHECK(Thread::Current()->IsExceptionPending()); |
| 99 | return NULL; // Failure |
| 100 | } |
| 101 | CHECK(klass->IsArrayClass()) << PrettyClass(klass); |
| 102 | } |
| 103 | if (access_check) { |
| 104 | Class* referrer = method->GetDeclaringClass(); |
| 105 | if (UNLIKELY(!referrer->CanAccess(klass))) { |
Ian Rogers | 87e552d | 2012-08-31 15:54:48 -0700 | [diff] [blame] | 106 | ThrowIllegalAccessErrorClass(referrer, klass); |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 107 | return NULL; // Failure |
| 108 | } |
| 109 | } |
| 110 | return Array::Alloc(klass, component_count); |
| 111 | } |
| 112 | |
Ian Rogers | ce9eca6 | 2011-10-07 17:11:03 -0700 | [diff] [blame] | 113 | extern Array* CheckAndAllocArrayFromCode(uint32_t type_idx, Method* method, int32_t component_count, |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 114 | Thread* self, bool access_check) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 115 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 116 | |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 117 | // Type of find field operation for fast and slow case. |
| 118 | enum FindFieldType { |
| 119 | InstanceObjectRead, |
| 120 | InstanceObjectWrite, |
| 121 | InstancePrimitiveRead, |
| 122 | InstancePrimitiveWrite, |
| 123 | StaticObjectRead, |
| 124 | StaticObjectWrite, |
| 125 | StaticPrimitiveRead, |
| 126 | StaticPrimitiveWrite, |
| 127 | }; |
| 128 | |
| 129 | // Slow field find that can initialize classes and may throw exceptions. |
Ian Rogers | 1bddec3 | 2012-02-04 12:27:34 -0800 | [diff] [blame] | 130 | extern Field* FindFieldFromCode(uint32_t field_idx, const Method* referrer, Thread* self, |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 131 | FindFieldType type, size_t expected_size) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 132 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 133 | |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 134 | // Fast path field resolution that can't initialize classes or throw exceptions. |
| 135 | static inline Field* FindFieldFast(uint32_t field_idx, const Method* referrer, |
| 136 | FindFieldType type, size_t expected_size) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 137 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 138 | Field* resolved_field = referrer->GetDeclaringClass()->GetDexCache()->GetResolvedField(field_idx); |
| 139 | if (UNLIKELY(resolved_field == NULL)) { |
| 140 | return NULL; |
| 141 | } |
| 142 | Class* fields_class = resolved_field->GetDeclaringClass(); |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 143 | // Check class is initiliazed or initializing. |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 144 | if (UNLIKELY(!fields_class->IsInitializing())) { |
| 145 | return NULL; |
| 146 | } |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 147 | // Check for incompatible class change. |
| 148 | bool is_primitive; |
| 149 | bool is_set; |
| 150 | bool is_static; |
| 151 | switch (type) { |
| 152 | case InstanceObjectRead: is_primitive = false; is_set = false; is_static = false; break; |
| 153 | case InstanceObjectWrite: is_primitive = false; is_set = true; is_static = false; break; |
| 154 | case InstancePrimitiveRead: is_primitive = true; is_set = false; is_static = false; break; |
| 155 | case InstancePrimitiveWrite: is_primitive = true; is_set = true; is_static = false; break; |
| 156 | case StaticObjectRead: is_primitive = false; is_set = false; is_static = true; break; |
| 157 | case StaticObjectWrite: is_primitive = false; is_set = true; is_static = true; break; |
| 158 | case StaticPrimitiveRead: is_primitive = true; is_set = false; is_static = true; break; |
| 159 | case StaticPrimitiveWrite: is_primitive = true; is_set = true; is_static = true; break; |
| 160 | default: LOG(FATAL) << "UNREACHABLE"; // Assignment below to avoid GCC warnings. |
| 161 | is_primitive = true; is_set = true; is_static = true; break; |
| 162 | } |
| 163 | if (UNLIKELY(resolved_field->IsStatic() != is_static)) { |
| 164 | // Incompatible class change. |
| 165 | return NULL; |
| 166 | } |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 167 | Class* referring_class = referrer->GetDeclaringClass(); |
| 168 | if (UNLIKELY(!referring_class->CanAccess(fields_class) || |
| 169 | !referring_class->CanAccessMember(fields_class, |
| 170 | resolved_field->GetAccessFlags()) || |
| 171 | (is_set && resolved_field->IsFinal() && (fields_class != referring_class)))) { |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 172 | // Illegal access. |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 173 | return NULL; |
| 174 | } |
| 175 | FieldHelper fh(resolved_field); |
| 176 | if (UNLIKELY(fh.IsPrimitiveType() != is_primitive || |
| 177 | fh.FieldSize() != expected_size)) { |
| 178 | return NULL; |
| 179 | } |
| 180 | return resolved_field; |
| 181 | } |
| 182 | |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 183 | // Fast path method resolution that can't throw exceptions. |
| 184 | static inline Method* FindMethodFast(uint32_t method_idx, Object* this_object, |
| 185 | const Method* referrer, bool access_check, InvokeType type) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 186 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 187 | bool is_direct = type == kStatic || type == kDirect; |
| 188 | if (UNLIKELY(this_object == NULL && !is_direct)) { |
| 189 | return NULL; |
| 190 | } |
| 191 | Method* resolved_method = |
| 192 | referrer->GetDeclaringClass()->GetDexCache()->GetResolvedMethod(method_idx); |
| 193 | if (UNLIKELY(resolved_method == NULL)) { |
| 194 | return NULL; |
| 195 | } |
| 196 | if (access_check) { |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 197 | // Check for incompatible class change errors and access. |
| 198 | bool icce = resolved_method->CheckIncompatibleClassChange(type); |
| 199 | if (UNLIKELY(icce)) { |
| 200 | return NULL; |
| 201 | } |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 202 | Class* methods_class = resolved_method->GetDeclaringClass(); |
| 203 | Class* referring_class = referrer->GetDeclaringClass(); |
| 204 | if (UNLIKELY(!referring_class->CanAccess(methods_class) || |
| 205 | !referring_class->CanAccessMember(methods_class, |
| 206 | resolved_method->GetAccessFlags()))) { |
Ian Rogers | 08f753d | 2012-08-24 14:35:25 -0700 | [diff] [blame] | 207 | // Potential illegal access, may need to refine the method's class. |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 208 | return NULL; |
| 209 | } |
| 210 | } |
| 211 | if (type == kInterface) { // Most common form of slow path dispatch. |
| 212 | return this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); |
| 213 | } else if (is_direct) { |
| 214 | return resolved_method; |
| 215 | } else if (type == kSuper) { |
| 216 | return referrer->GetDeclaringClass()->GetSuperClass()->GetVTable()-> |
| 217 | Get(resolved_method->GetMethodIndex()); |
| 218 | } else { |
| 219 | DCHECK(type == kVirtual); |
| 220 | return this_object->GetClass()->GetVTable()->Get(resolved_method->GetMethodIndex()); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | extern Method* FindMethodFromCode(uint32_t method_idx, Object* this_object, const Method* referrer, |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 225 | Thread* self, bool access_check, InvokeType type) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 226 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 227 | |
Elliott Hughes | f3778f6 | 2012-01-26 14:14:35 -0800 | [diff] [blame] | 228 | extern Class* ResolveVerifyAndClinit(uint32_t type_idx, const Method* referrer, Thread* self, |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 229 | bool can_run_clinit, bool verify_access) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 230 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 231 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 232 | static inline String* ResolveStringFromCode(const Method* referrer, uint32_t string_idx) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 233 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 234 | ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| 235 | return class_linker->ResolveString(string_idx, referrer); |
| 236 | } |
Shih-wei Liao | 2d83101 | 2011-09-28 22:06:53 -0700 | [diff] [blame] | 237 | |
TDYa127 | 3d71d80 | 2012-08-15 03:47:03 -0700 | [diff] [blame] | 238 | static inline void UnlockJniSynchronizedMethod(jobject locked, Thread* self) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 239 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
TDYa127 | 3d71d80 | 2012-08-15 03:47:03 -0700 | [diff] [blame] | 240 | UNLOCK_FUNCTION(monitor_lock_) { |
| 241 | // Save any pending exception over monitor exit call. |
| 242 | Throwable* saved_exception = NULL; |
| 243 | if (UNLIKELY(self->IsExceptionPending())) { |
| 244 | saved_exception = self->GetException(); |
| 245 | self->ClearException(); |
| 246 | } |
| 247 | // Decode locked object and unlock, before popping local references. |
| 248 | self->DecodeJObject(locked)->MonitorExit(self); |
| 249 | if (UNLIKELY(self->IsExceptionPending())) { |
| 250 | LOG(FATAL) << "Synchronized JNI code returning with an exception:\n" |
| 251 | << saved_exception->Dump() |
| 252 | << "\nEncountered second exception during implicit MonitorExit:\n" |
| 253 | << self->GetException()->Dump(); |
| 254 | } |
| 255 | // Restore pending exception. |
| 256 | if (saved_exception != NULL) { |
| 257 | self->SetException(saved_exception); |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | static inline void CheckReferenceResult(Object* o, Thread* self) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame^] | 262 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
TDYa127 | 3d71d80 | 2012-08-15 03:47:03 -0700 | [diff] [blame] | 263 | if (o == NULL) { |
| 264 | return; |
| 265 | } |
| 266 | if (o == kInvalidIndirectRefObject) { |
| 267 | JniAbortF(NULL, "invalid reference returned from %s", |
| 268 | PrettyMethod(self->GetCurrentMethod()).c_str()); |
| 269 | } |
| 270 | // Make sure that the result is an instance of the type this method was expected to return. |
| 271 | Method* m = self->GetCurrentMethod(); |
| 272 | MethodHelper mh(m); |
| 273 | Class* return_type = mh.GetReturnType(); |
| 274 | |
| 275 | if (!o->InstanceOf(return_type)) { |
| 276 | JniAbortF(NULL, "attempt to return an instance of %s from %s", |
| 277 | PrettyTypeOf(o).c_str(), PrettyMethod(m).c_str()); |
| 278 | } |
| 279 | } |
| 280 | |
Shih-wei Liao | 2d83101 | 2011-09-28 22:06:53 -0700 | [diff] [blame] | 281 | } // namespace art |
Ian Rogers | ad42e13 | 2011-09-17 20:23:33 -0700 | [diff] [blame] | 282 | |
buzbee | 5433072 | 2011-08-23 16:46:55 -0700 | [diff] [blame] | 283 | #endif // ART_SRC_RUNTIME_SUPPORT_H_ |