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 */
16
17 #include "entrypoints/entrypoint_utils.h"
18
19 #include "art_field-inl.h"
20 #include "art_method-inl.h"
21 #include "base/mutex.h"
22 #include "class_linker-inl.h"
23 #include "dex_file-inl.h"
24 #include "entrypoints/entrypoint_utils-inl.h"
25 #include "entrypoints/quick/callee_save_frame.h"
26 #include "entrypoints/runtime_asm_entrypoints.h"
27 #include "gc/accounting/card_table-inl.h"
28 #include "mirror/class-inl.h"
29 #include "mirror/method.h"
30 #include "mirror/object-inl.h"
31 #include "mirror/object_array-inl.h"
32 #include "nth_caller_visitor.h"
33 #include "oat_quick_method_header.h"
34 #include "reflection.h"
35 #include "scoped_thread_state_change.h"
36 #include "well_known_classes.h"
37
38 namespace art {
39
CheckFilledNewArrayAlloc(uint32_t type_idx,int32_t component_count,ArtMethod * referrer,Thread * self,bool access_check)40 static inline mirror::Class* CheckFilledNewArrayAlloc(uint32_t type_idx,
41 int32_t component_count,
42 ArtMethod* referrer,
43 Thread* self,
44 bool access_check)
45 SHARED_REQUIRES(Locks::mutator_lock_) {
46 if (UNLIKELY(component_count < 0)) {
47 ThrowNegativeArraySizeException(component_count);
48 return nullptr; // Failure
49 }
50 ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
51 size_t pointer_size = class_linker->GetImagePointerSize();
52 mirror::Class* klass = referrer->GetDexCacheResolvedType<false>(type_idx, pointer_size);
53 if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve
54 klass = class_linker->ResolveType(type_idx, referrer);
55 if (klass == nullptr) { // Error
56 DCHECK(self->IsExceptionPending());
57 return nullptr; // Failure
58 }
59 }
60 if (UNLIKELY(klass->IsPrimitive() && !klass->IsPrimitiveInt())) {
61 if (klass->IsPrimitiveLong() || klass->IsPrimitiveDouble()) {
62 ThrowRuntimeException("Bad filled array request for type %s",
63 PrettyDescriptor(klass).c_str());
64 } else {
65 self->ThrowNewExceptionF(
66 "Ljava/lang/InternalError;",
67 "Found type %s; filled-new-array not implemented for anything but 'int'",
68 PrettyDescriptor(klass).c_str());
69 }
70 return nullptr; // Failure
71 }
72 if (access_check) {
73 mirror::Class* referrer_klass = referrer->GetDeclaringClass();
74 if (UNLIKELY(!referrer_klass->CanAccess(klass))) {
75 ThrowIllegalAccessErrorClass(referrer_klass, klass);
76 return nullptr; // Failure
77 }
78 }
79 DCHECK(klass->IsArrayClass()) << PrettyClass(klass);
80 return klass;
81 }
82
83 // Helper function to allocate array for FILLED_NEW_ARRAY.
CheckAndAllocArrayFromCode(uint32_t type_idx,int32_t component_count,ArtMethod * referrer,Thread * self,bool access_check,gc::AllocatorType)84 mirror::Array* CheckAndAllocArrayFromCode(uint32_t type_idx, int32_t component_count,
85 ArtMethod* referrer, Thread* self,
86 bool access_check,
87 gc::AllocatorType /* allocator_type */) {
88 mirror::Class* klass = CheckFilledNewArrayAlloc(type_idx, component_count, referrer, self,
89 access_check);
90 if (UNLIKELY(klass == nullptr)) {
91 return nullptr;
92 }
93 // Always go slow path for now, filled new array is not common.
94 gc::Heap* heap = Runtime::Current()->GetHeap();
95 // Use the current allocator type in case CheckFilledNewArrayAlloc caused us to suspend and then
96 // the heap switched the allocator type while we were suspended.
97 return mirror::Array::Alloc<false>(self, klass, component_count,
98 klass->GetComponentSizeShift(),
99 heap->GetCurrentAllocator());
100 }
101
102 // Helper function to allocate array for FILLED_NEW_ARRAY.
CheckAndAllocArrayFromCodeInstrumented(uint32_t type_idx,int32_t component_count,ArtMethod * referrer,Thread * self,bool access_check,gc::AllocatorType)103 mirror::Array* CheckAndAllocArrayFromCodeInstrumented(uint32_t type_idx,
104 int32_t component_count,
105 ArtMethod* referrer,
106 Thread* self,
107 bool access_check,
108 gc::AllocatorType /* allocator_type */) {
109 mirror::Class* klass = CheckFilledNewArrayAlloc(type_idx, component_count, referrer, self,
110 access_check);
111 if (UNLIKELY(klass == nullptr)) {
112 return nullptr;
113 }
114 gc::Heap* heap = Runtime::Current()->GetHeap();
115 // Use the current allocator type in case CheckFilledNewArrayAlloc caused us to suspend and then
116 // the heap switched the allocator type while we were suspended.
117 return mirror::Array::Alloc<true>(self, klass, component_count,
118 klass->GetComponentSizeShift(),
119 heap->GetCurrentAllocator());
120 }
121
CheckReferenceResult(mirror::Object * o,Thread * self)122 void CheckReferenceResult(mirror::Object* o, Thread* self) {
123 if (o == nullptr) {
124 return;
125 }
126 // Make sure that the result is an instance of the type this method was expected to return.
127 mirror::Class* return_type = self->GetCurrentMethod(nullptr)->GetReturnType(true /* resolve */,
128 sizeof(void*));
129
130 if (!o->InstanceOf(return_type)) {
131 Runtime::Current()->GetJavaVM()->JniAbortF(nullptr,
132 "attempt to return an instance of %s from %s",
133 PrettyTypeOf(o).c_str(),
134 PrettyMethod(self->GetCurrentMethod(nullptr)).c_str());
135 }
136 }
137
InvokeProxyInvocationHandler(ScopedObjectAccessAlreadyRunnable & soa,const char * shorty,jobject rcvr_jobj,jobject interface_method_jobj,std::vector<jvalue> & args)138 JValue InvokeProxyInvocationHandler(ScopedObjectAccessAlreadyRunnable& soa, const char* shorty,
139 jobject rcvr_jobj, jobject interface_method_jobj,
140 std::vector<jvalue>& args) {
141 DCHECK(soa.Env()->IsInstanceOf(rcvr_jobj, WellKnownClasses::java_lang_reflect_Proxy));
142
143 // Build argument array possibly triggering GC.
144 soa.Self()->AssertThreadSuspensionIsAllowable();
145 jobjectArray args_jobj = nullptr;
146 const JValue zero;
147 int32_t target_sdk_version = Runtime::Current()->GetTargetSdkVersion();
148 // Do not create empty arrays unless needed to maintain Dalvik bug compatibility.
149 if (args.size() > 0 || (target_sdk_version > 0 && target_sdk_version <= 21)) {
150 args_jobj = soa.Env()->NewObjectArray(args.size(), WellKnownClasses::java_lang_Object, nullptr);
151 if (args_jobj == nullptr) {
152 CHECK(soa.Self()->IsExceptionPending());
153 return zero;
154 }
155 for (size_t i = 0; i < args.size(); ++i) {
156 if (shorty[i + 1] == 'L') {
157 jobject val = args.at(i).l;
158 soa.Env()->SetObjectArrayElement(args_jobj, i, val);
159 } else {
160 JValue jv;
161 jv.SetJ(args.at(i).j);
162 mirror::Object* val = BoxPrimitive(Primitive::GetType(shorty[i + 1]), jv);
163 if (val == nullptr) {
164 CHECK(soa.Self()->IsExceptionPending());
165 return zero;
166 }
167 soa.Decode<mirror::ObjectArray<mirror::Object>* >(args_jobj)->Set<false>(i, val);
168 }
169 }
170 }
171
172 // Call Proxy.invoke(Proxy proxy, Method method, Object[] args).
173 jvalue invocation_args[3];
174 invocation_args[0].l = rcvr_jobj;
175 invocation_args[1].l = interface_method_jobj;
176 invocation_args[2].l = args_jobj;
177 jobject result =
178 soa.Env()->CallStaticObjectMethodA(WellKnownClasses::java_lang_reflect_Proxy,
179 WellKnownClasses::java_lang_reflect_Proxy_invoke,
180 invocation_args);
181
182 // Unbox result and handle error conditions.
183 if (LIKELY(!soa.Self()->IsExceptionPending())) {
184 if (shorty[0] == 'V' || (shorty[0] == 'L' && result == nullptr)) {
185 // Do nothing.
186 return zero;
187 } else {
188 StackHandleScope<1> hs(soa.Self());
189 auto h_interface_method(hs.NewHandle(soa.Decode<mirror::Method*>(interface_method_jobj)));
190 // This can cause thread suspension.
191 size_t pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize();
192 mirror::Class* result_type =
193 h_interface_method->GetArtMethod()->GetReturnType(true /* resolve */, pointer_size);
194 mirror::Object* result_ref = soa.Decode<mirror::Object*>(result);
195 JValue result_unboxed;
196 if (!UnboxPrimitiveForResult(result_ref, result_type, &result_unboxed)) {
197 DCHECK(soa.Self()->IsExceptionPending());
198 return zero;
199 }
200 return result_unboxed;
201 }
202 } else {
203 // In the case of checked exceptions that aren't declared, the exception must be wrapped by
204 // a UndeclaredThrowableException.
205 mirror::Throwable* exception = soa.Self()->GetException();
206 if (exception->IsCheckedException()) {
207 mirror::Object* rcvr = soa.Decode<mirror::Object*>(rcvr_jobj);
208 mirror::Class* proxy_class = rcvr->GetClass();
209 mirror::Method* interface_method = soa.Decode<mirror::Method*>(interface_method_jobj);
210 ArtMethod* proxy_method = rcvr->GetClass()->FindVirtualMethodForInterface(
211 interface_method->GetArtMethod(), sizeof(void*));
212 auto virtual_methods = proxy_class->GetVirtualMethodsSlice(sizeof(void*));
213 size_t num_virtuals = proxy_class->NumVirtualMethods();
214 size_t method_size = ArtMethod::Size(sizeof(void*));
215 // Rely on the fact that the methods are contiguous to determine the index of the method in
216 // the slice.
217 int throws_index = (reinterpret_cast<uintptr_t>(proxy_method) -
218 reinterpret_cast<uintptr_t>(&virtual_methods.At(0))) / method_size;
219 CHECK_LT(throws_index, static_cast<int>(num_virtuals));
220 mirror::ObjectArray<mirror::Class>* declared_exceptions =
221 proxy_class->GetThrows()->Get(throws_index);
222 mirror::Class* exception_class = exception->GetClass();
223 bool declares_exception = false;
224 for (int32_t i = 0; i < declared_exceptions->GetLength() && !declares_exception; i++) {
225 mirror::Class* declared_exception = declared_exceptions->Get(i);
226 declares_exception = declared_exception->IsAssignableFrom(exception_class);
227 }
228 if (!declares_exception) {
229 soa.Self()->ThrowNewWrappedException("Ljava/lang/reflect/UndeclaredThrowableException;",
230 nullptr);
231 }
232 }
233 return zero;
234 }
235 }
236
FillArrayData(mirror::Object * obj,const Instruction::ArrayDataPayload * payload)237 bool FillArrayData(mirror::Object* obj, const Instruction::ArrayDataPayload* payload) {
238 DCHECK_EQ(payload->ident, static_cast<uint16_t>(Instruction::kArrayDataSignature));
239 if (UNLIKELY(obj == nullptr)) {
240 ThrowNullPointerException("null array in FILL_ARRAY_DATA");
241 return false;
242 }
243 mirror::Array* array = obj->AsArray();
244 DCHECK(!array->IsObjectArray());
245 if (UNLIKELY(static_cast<int32_t>(payload->element_count) > array->GetLength())) {
246 Thread* self = Thread::Current();
247 self->ThrowNewExceptionF("Ljava/lang/ArrayIndexOutOfBoundsException;",
248 "failed FILL_ARRAY_DATA; length=%d, index=%d",
249 array->GetLength(), payload->element_count);
250 return false;
251 }
252 // Copy data from dex file to memory assuming both are little endian.
253 uint32_t size_in_bytes = payload->element_count * payload->element_width;
254 memcpy(array->GetRawData(payload->element_width, 0), payload->data, size_in_bytes);
255 return true;
256 }
257
GetCalleeSaveMethodCaller(ArtMethod ** sp,Runtime::CalleeSaveType type,bool do_caller_check)258 ArtMethod* GetCalleeSaveMethodCaller(ArtMethod** sp,
259 Runtime::CalleeSaveType type,
260 bool do_caller_check)
261 SHARED_REQUIRES(Locks::mutator_lock_) {
262 DCHECK_EQ(*sp, Runtime::Current()->GetCalleeSaveMethod(type));
263
264 const size_t callee_frame_size = GetCalleeSaveFrameSize(kRuntimeISA, type);
265 auto** caller_sp = reinterpret_cast<ArtMethod**>(
266 reinterpret_cast<uintptr_t>(sp) + callee_frame_size);
267 const size_t callee_return_pc_offset = GetCalleeSaveReturnPcOffset(kRuntimeISA, type);
268 uintptr_t caller_pc = *reinterpret_cast<uintptr_t*>(
269 (reinterpret_cast<uint8_t*>(sp) + callee_return_pc_offset));
270 ArtMethod* outer_method = *caller_sp;
271 ArtMethod* caller = outer_method;
272 if (LIKELY(caller_pc != reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc()))) {
273 if (outer_method != nullptr) {
274 const OatQuickMethodHeader* current_code = outer_method->GetOatQuickMethodHeader(caller_pc);
275 DCHECK(current_code != nullptr);
276 DCHECK(current_code->IsOptimized());
277 uintptr_t native_pc_offset = current_code->NativeQuickPcOffset(caller_pc);
278 CodeInfo code_info = current_code->GetOptimizedCodeInfo();
279 CodeInfoEncoding encoding = code_info.ExtractEncoding();
280 StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
281 DCHECK(stack_map.IsValid());
282 if (stack_map.HasInlineInfo(encoding.stack_map_encoding)) {
283 InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
284 caller = GetResolvedMethod(outer_method,
285 inline_info,
286 encoding.inline_info_encoding,
287 inline_info.GetDepth(encoding.inline_info_encoding) - 1);
288 }
289 }
290 if (kIsDebugBuild && do_caller_check) {
291 // Note that do_caller_check is optional, as this method can be called by
292 // stubs, and tests without a proper call stack.
293 NthCallerVisitor visitor(Thread::Current(), 1, true);
294 visitor.WalkStack();
295 CHECK_EQ(caller, visitor.caller);
296 }
297 } else {
298 // We're instrumenting, just use the StackVisitor which knows how to
299 // handle instrumented frames.
300 NthCallerVisitor visitor(Thread::Current(), 1, true);
301 visitor.WalkStack();
302 caller = visitor.caller;
303 }
304
305 return caller;
306 }
307
308 } // namespace art
309