Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | |
Andreas Gampe | ba8df69 | 2016-11-01 10:30:44 -0700 | [diff] [blame] | 17 | #include "ti_heap.h" |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 18 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 19 | #include "art_field-inl.h" |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 20 | #include "art_jvmti.h" |
| 21 | #include "base/macros.h" |
| 22 | #include "base/mutex.h" |
Andreas Gampe | aa8b60c | 2016-10-12 12:51:25 -0700 | [diff] [blame] | 23 | #include "class_linker.h" |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 24 | #include "gc/heap.h" |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 25 | #include "gc_root-inl.h" |
Andreas Gampe | aa8b60c | 2016-10-12 12:51:25 -0700 | [diff] [blame] | 26 | #include "jni_env_ext.h" |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 27 | #include "jni_internal.h" |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 28 | #include "mirror/class.h" |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 29 | #include "mirror/object-inl.h" |
| 30 | #include "mirror/object_array-inl.h" |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 31 | #include "object_callbacks.h" |
| 32 | #include "object_tagging.h" |
| 33 | #include "obj_ptr-inl.h" |
Andreas Gampe | becd6ad | 2017-02-22 19:20:37 -0800 | [diff] [blame] | 34 | #include "primitive.h" |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 35 | #include "runtime.h" |
| 36 | #include "scoped_thread_state_change-inl.h" |
| 37 | #include "thread-inl.h" |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 38 | #include "thread_list.h" |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 39 | |
| 40 | namespace openjdkjvmti { |
| 41 | |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 42 | namespace { |
| 43 | |
| 44 | // Report the contents of a string, if a callback is set. |
| 45 | jint ReportString(art::ObjPtr<art::mirror::Object> obj, |
| 46 | jvmtiEnv* env, |
| 47 | ObjectTagTable* tag_table, |
| 48 | const jvmtiHeapCallbacks* cb, |
| 49 | const void* user_data) REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 50 | if (UNLIKELY(cb->string_primitive_value_callback != nullptr) && obj->IsString()) { |
| 51 | art::ObjPtr<art::mirror::String> str = obj->AsString(); |
| 52 | int32_t string_length = str->GetLength(); |
Andreas Gampe | 5f94203 | 2017-02-27 19:59:40 -0800 | [diff] [blame] | 53 | JvmtiUniquePtr<uint16_t[]> data; |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 54 | |
Andreas Gampe | 5f94203 | 2017-02-27 19:59:40 -0800 | [diff] [blame] | 55 | if (string_length > 0) { |
| 56 | jvmtiError alloc_error; |
| 57 | data = AllocJvmtiUniquePtr<uint16_t[]>(env, string_length, &alloc_error); |
| 58 | if (data == nullptr) { |
| 59 | // TODO: Not really sure what to do here. Should we abort the iteration and go all the way |
| 60 | // back? For now just warn. |
| 61 | LOG(WARNING) << "Unable to allocate buffer for string reporting! Silently dropping value." |
| 62 | << " >" << str->ToModifiedUtf8() << "<"; |
| 63 | return 0; |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 64 | } |
Andreas Gampe | 5f94203 | 2017-02-27 19:59:40 -0800 | [diff] [blame] | 65 | |
| 66 | if (str->IsCompressed()) { |
| 67 | uint8_t* compressed_data = str->GetValueCompressed(); |
| 68 | for (int32_t i = 0; i != string_length; ++i) { |
| 69 | data[i] = compressed_data[i]; |
| 70 | } |
| 71 | } else { |
| 72 | // Can copy directly. |
| 73 | memcpy(data.get(), str->GetValue(), string_length * sizeof(uint16_t)); |
| 74 | } |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | const jlong class_tag = tag_table->GetTagOrZero(obj->GetClass()); |
| 78 | jlong string_tag = tag_table->GetTagOrZero(obj.Ptr()); |
| 79 | const jlong saved_string_tag = string_tag; |
| 80 | |
| 81 | jint result = cb->string_primitive_value_callback(class_tag, |
| 82 | obj->SizeOf(), |
| 83 | &string_tag, |
| 84 | data.get(), |
| 85 | string_length, |
| 86 | const_cast<void*>(user_data)); |
| 87 | if (string_tag != saved_string_tag) { |
| 88 | tag_table->Set(obj.Ptr(), string_tag); |
| 89 | } |
| 90 | |
| 91 | return result; |
| 92 | } |
| 93 | return 0; |
| 94 | } |
| 95 | |
Andreas Gampe | becd6ad | 2017-02-22 19:20:37 -0800 | [diff] [blame] | 96 | // Report the contents of a primitive array, if a callback is set. |
| 97 | jint ReportPrimitiveArray(art::ObjPtr<art::mirror::Object> obj, |
| 98 | jvmtiEnv* env, |
| 99 | ObjectTagTable* tag_table, |
| 100 | const jvmtiHeapCallbacks* cb, |
| 101 | const void* user_data) REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 102 | if (UNLIKELY(cb->array_primitive_value_callback != nullptr) && |
| 103 | obj->IsArrayInstance() && |
| 104 | !obj->IsObjectArray()) { |
| 105 | art::ObjPtr<art::mirror::Array> array = obj->AsArray(); |
| 106 | int32_t array_length = array->GetLength(); |
| 107 | size_t component_size = array->GetClass()->GetComponentSize(); |
| 108 | art::Primitive::Type art_prim_type = array->GetClass()->GetComponentType()->GetPrimitiveType(); |
| 109 | jvmtiPrimitiveType prim_type = |
| 110 | static_cast<jvmtiPrimitiveType>(art::Primitive::Descriptor(art_prim_type)[0]); |
| 111 | DCHECK(prim_type == JVMTI_PRIMITIVE_TYPE_BOOLEAN || |
| 112 | prim_type == JVMTI_PRIMITIVE_TYPE_BYTE || |
| 113 | prim_type == JVMTI_PRIMITIVE_TYPE_CHAR || |
| 114 | prim_type == JVMTI_PRIMITIVE_TYPE_SHORT || |
| 115 | prim_type == JVMTI_PRIMITIVE_TYPE_INT || |
| 116 | prim_type == JVMTI_PRIMITIVE_TYPE_LONG || |
| 117 | prim_type == JVMTI_PRIMITIVE_TYPE_FLOAT || |
| 118 | prim_type == JVMTI_PRIMITIVE_TYPE_DOUBLE); |
| 119 | |
| 120 | const jlong class_tag = tag_table->GetTagOrZero(obj->GetClass()); |
| 121 | jlong array_tag = tag_table->GetTagOrZero(obj.Ptr()); |
| 122 | const jlong saved_array_tag = array_tag; |
| 123 | |
| 124 | jint result; |
| 125 | if (array_length == 0) { |
| 126 | result = cb->array_primitive_value_callback(class_tag, |
| 127 | obj->SizeOf(), |
| 128 | &array_tag, |
| 129 | 0, |
| 130 | prim_type, |
| 131 | nullptr, |
| 132 | const_cast<void*>(user_data)); |
| 133 | } else { |
| 134 | jvmtiError alloc_error; |
| 135 | JvmtiUniquePtr<char[]> data = AllocJvmtiUniquePtr<char[]>(env, |
| 136 | array_length * component_size, |
| 137 | &alloc_error); |
| 138 | if (data == nullptr) { |
| 139 | // TODO: Not really sure what to do here. Should we abort the iteration and go all the way |
| 140 | // back? For now just warn. |
| 141 | LOG(WARNING) << "Unable to allocate buffer for array reporting! Silently dropping value."; |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | memcpy(data.get(), array->GetRawData(component_size, 0), array_length * component_size); |
| 146 | |
| 147 | result = cb->array_primitive_value_callback(class_tag, |
| 148 | obj->SizeOf(), |
| 149 | &array_tag, |
| 150 | array_length, |
| 151 | prim_type, |
| 152 | data.get(), |
| 153 | const_cast<void*>(user_data)); |
| 154 | } |
| 155 | |
| 156 | if (array_tag != saved_array_tag) { |
| 157 | tag_table->Set(obj.Ptr(), array_tag); |
| 158 | } |
| 159 | |
| 160 | return result; |
| 161 | } |
| 162 | return 0; |
| 163 | } |
| 164 | |
Andreas Gampe | e731693 | 2017-02-25 09:15:05 -0800 | [diff] [blame^] | 165 | template <typename UserData> |
| 166 | bool VisitorFalse(art::ObjPtr<art::mirror::Object> obj ATTRIBUTE_UNUSED, |
| 167 | art::ObjPtr<art::mirror::Class> klass ATTRIBUTE_UNUSED, |
| 168 | art::ArtField& field ATTRIBUTE_UNUSED, |
| 169 | size_t field_index ATTRIBUTE_UNUSED, |
| 170 | UserData* user_data ATTRIBUTE_UNUSED) { |
| 171 | return false; |
| 172 | } |
| 173 | |
| 174 | template <typename StaticPrimitiveVisitor, |
| 175 | typename StaticReferenceVisitor, |
| 176 | typename InstancePrimitiveVisitor, |
| 177 | typename InstanceReferenceVisitor, |
| 178 | typename UserData, |
| 179 | bool kCallVisitorOnRecursion> |
| 180 | class FieldVisitor { |
| 181 | public: |
| 182 | // Report the contents of a primitive fields of the given object, if a callback is set. |
| 183 | static bool ReportFields(art::ObjPtr<art::mirror::Object> obj, |
| 184 | UserData* user_data, |
| 185 | StaticPrimitiveVisitor& static_prim_visitor, |
| 186 | StaticReferenceVisitor& static_ref_visitor, |
| 187 | InstancePrimitiveVisitor& instance_prim_visitor, |
| 188 | InstanceReferenceVisitor& instance_ref_visitor) |
| 189 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 190 | FieldVisitor fv(user_data); |
| 191 | |
| 192 | if (obj->IsClass()) { |
| 193 | // When visiting a class, we only visit the static fields of the given class. No field of |
| 194 | // superclasses is visited. |
| 195 | art::ObjPtr<art::mirror::Class> klass = obj->AsClass(); |
| 196 | // Only report fields on resolved classes. We need valid field data. |
| 197 | if (!klass->IsResolved()) { |
| 198 | return false; |
| 199 | } |
| 200 | return fv.ReportFieldsImpl(nullptr, |
| 201 | obj->AsClass(), |
| 202 | obj->AsClass()->IsInterface(), |
| 203 | static_prim_visitor, |
| 204 | static_ref_visitor, |
| 205 | instance_prim_visitor, |
| 206 | instance_ref_visitor); |
| 207 | } else { |
| 208 | // See comment above. Just double-checking here, but an instance *should* mean the class was |
| 209 | // resolved. |
| 210 | DCHECK(obj->GetClass()->IsResolved() || obj->GetClass()->IsErroneousResolved()); |
| 211 | return fv.ReportFieldsImpl(obj, |
| 212 | obj->GetClass(), |
| 213 | false, |
| 214 | static_prim_visitor, |
| 215 | static_ref_visitor, |
| 216 | instance_prim_visitor, |
| 217 | instance_ref_visitor); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | private: |
| 222 | explicit FieldVisitor(UserData* user_data) : user_data_(user_data) {} |
| 223 | |
| 224 | // Report the contents of fields of the given object. If obj is null, report the static fields, |
| 225 | // otherwise the instance fields. |
| 226 | bool ReportFieldsImpl(art::ObjPtr<art::mirror::Object> obj, |
| 227 | art::ObjPtr<art::mirror::Class> klass, |
| 228 | bool skip_java_lang_object, |
| 229 | StaticPrimitiveVisitor& static_prim_visitor, |
| 230 | StaticReferenceVisitor& static_ref_visitor, |
| 231 | InstancePrimitiveVisitor& instance_prim_visitor, |
| 232 | InstanceReferenceVisitor& instance_ref_visitor) |
| 233 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 234 | // Compute the offset of field indices. |
| 235 | size_t interface_field_count = CountInterfaceFields(klass); |
| 236 | |
| 237 | size_t tmp; |
| 238 | bool aborted = ReportFieldsRecursive(obj, |
| 239 | klass, |
| 240 | interface_field_count, |
| 241 | skip_java_lang_object, |
| 242 | static_prim_visitor, |
| 243 | static_ref_visitor, |
| 244 | instance_prim_visitor, |
| 245 | instance_ref_visitor, |
| 246 | &tmp); |
| 247 | return aborted; |
| 248 | } |
| 249 | |
| 250 | // Visit primitive fields in an object (instance). Return true if the visit was aborted. |
| 251 | bool ReportFieldsRecursive(art::ObjPtr<art::mirror::Object> obj, |
| 252 | art::ObjPtr<art::mirror::Class> klass, |
| 253 | size_t interface_fields, |
| 254 | bool skip_java_lang_object, |
| 255 | StaticPrimitiveVisitor& static_prim_visitor, |
| 256 | StaticReferenceVisitor& static_ref_visitor, |
| 257 | InstancePrimitiveVisitor& instance_prim_visitor, |
| 258 | InstanceReferenceVisitor& instance_ref_visitor, |
| 259 | size_t* field_index_out) |
| 260 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 261 | DCHECK(klass != nullptr); |
| 262 | size_t field_index; |
| 263 | if (klass->GetSuperClass() == nullptr) { |
| 264 | // j.l.Object. Start with the fields from interfaces. |
| 265 | field_index = interface_fields; |
| 266 | if (skip_java_lang_object) { |
| 267 | *field_index_out = field_index; |
| 268 | return false; |
| 269 | } |
| 270 | } else { |
| 271 | // Report superclass fields. |
| 272 | if (kCallVisitorOnRecursion) { |
| 273 | if (ReportFieldsRecursive(obj, |
| 274 | klass->GetSuperClass(), |
| 275 | interface_fields, |
| 276 | skip_java_lang_object, |
| 277 | static_prim_visitor, |
| 278 | static_ref_visitor, |
| 279 | instance_prim_visitor, |
| 280 | instance_ref_visitor, |
| 281 | &field_index)) { |
| 282 | return true; |
| 283 | } |
| 284 | } else { |
| 285 | // Still call, but with empty visitor. This is required for correct counting. |
| 286 | ReportFieldsRecursive(obj, |
| 287 | klass->GetSuperClass(), |
| 288 | interface_fields, |
| 289 | skip_java_lang_object, |
| 290 | VisitorFalse<UserData>, |
| 291 | VisitorFalse<UserData>, |
| 292 | VisitorFalse<UserData>, |
| 293 | VisitorFalse<UserData>, |
| 294 | &field_index); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | // Now visit fields for the current klass. |
| 299 | |
| 300 | for (auto& static_field : klass->GetSFields()) { |
| 301 | if (static_field.IsPrimitiveType()) { |
| 302 | if (static_prim_visitor(obj, |
| 303 | klass, |
| 304 | static_field, |
| 305 | field_index, |
| 306 | user_data_)) { |
| 307 | return true; |
| 308 | } |
| 309 | } else { |
| 310 | if (static_ref_visitor(obj, |
| 311 | klass, |
| 312 | static_field, |
| 313 | field_index, |
| 314 | user_data_)) { |
| 315 | return true; |
| 316 | } |
| 317 | } |
| 318 | field_index++; |
| 319 | } |
| 320 | |
| 321 | for (auto& instance_field : klass->GetIFields()) { |
| 322 | if (instance_field.IsPrimitiveType()) { |
| 323 | if (instance_prim_visitor(obj, |
| 324 | klass, |
| 325 | instance_field, |
| 326 | field_index, |
| 327 | user_data_)) { |
| 328 | return true; |
| 329 | } |
| 330 | } else { |
| 331 | if (instance_ref_visitor(obj, |
| 332 | klass, |
| 333 | instance_field, |
| 334 | field_index, |
| 335 | user_data_)) { |
| 336 | return true; |
| 337 | } |
| 338 | } |
| 339 | field_index++; |
| 340 | } |
| 341 | |
| 342 | *field_index_out = field_index; |
| 343 | return false; |
| 344 | } |
| 345 | |
| 346 | // Implements a visit of the implemented interfaces of a given class. |
| 347 | template <typename T> |
| 348 | struct RecursiveInterfaceVisit { |
| 349 | static void VisitStatic(art::Thread* self, art::ObjPtr<art::mirror::Class> klass, T& visitor) |
| 350 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 351 | RecursiveInterfaceVisit rv; |
| 352 | rv.Visit(self, klass, visitor); |
| 353 | } |
| 354 | |
| 355 | void Visit(art::Thread* self, art::ObjPtr<art::mirror::Class> klass, T& visitor) |
| 356 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 357 | // First visit the parent, to get the order right. |
| 358 | // (We do this in preparation for actual visiting of interface fields.) |
| 359 | if (klass->GetSuperClass() != nullptr) { |
| 360 | Visit(self, klass->GetSuperClass(), visitor); |
| 361 | } |
| 362 | for (uint32_t i = 0; i != klass->NumDirectInterfaces(); ++i) { |
| 363 | art::ObjPtr<art::mirror::Class> inf_klass = |
| 364 | art::mirror::Class::GetDirectInterface(self, klass, i); |
| 365 | DCHECK(inf_klass != nullptr); |
| 366 | VisitInterface(self, inf_klass, visitor); |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | void VisitInterface(art::Thread* self, art::ObjPtr<art::mirror::Class> inf_klass, T& visitor) |
| 371 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 372 | auto it = visited_interfaces.find(inf_klass.Ptr()); |
| 373 | if (it != visited_interfaces.end()) { |
| 374 | return; |
| 375 | } |
| 376 | visited_interfaces.insert(inf_klass.Ptr()); |
| 377 | |
| 378 | // Let the visitor know about this one. Note that this order is acceptable, as the ordering |
| 379 | // of these fields never matters for known visitors. |
| 380 | visitor(inf_klass); |
| 381 | |
| 382 | // Now visit the superinterfaces. |
| 383 | for (uint32_t i = 0; i != inf_klass->NumDirectInterfaces(); ++i) { |
| 384 | art::ObjPtr<art::mirror::Class> super_inf_klass = |
| 385 | art::mirror::Class::GetDirectInterface(self, inf_klass, i); |
| 386 | DCHECK(super_inf_klass != nullptr); |
| 387 | VisitInterface(self, super_inf_klass, visitor); |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | std::unordered_set<art::mirror::Class*> visited_interfaces; |
| 392 | }; |
| 393 | |
| 394 | // Counting interface fields. Note that we cannot use the interface table, as that only contains |
| 395 | // "non-marker" interfaces (= interfaces with methods). |
| 396 | static size_t CountInterfaceFields(art::ObjPtr<art::mirror::Class> klass) |
| 397 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 398 | size_t count = 0; |
| 399 | auto visitor = [&count](art::ObjPtr<art::mirror::Class> inf_klass) |
| 400 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 401 | DCHECK(inf_klass->IsInterface()); |
| 402 | DCHECK_EQ(0u, inf_klass->NumInstanceFields()); |
| 403 | count += inf_klass->NumStaticFields(); |
| 404 | }; |
| 405 | RecursiveInterfaceVisit<decltype(visitor)>::VisitStatic(art::Thread::Current(), klass, visitor); |
| 406 | return count; |
| 407 | |
| 408 | // TODO: Implement caching. |
| 409 | } |
| 410 | |
| 411 | UserData* user_data_; |
| 412 | }; |
| 413 | |
| 414 | // Debug helper. Prints the structure of an object. |
| 415 | template <bool kStatic, bool kRef> |
| 416 | struct DumpVisitor { |
| 417 | static bool Callback(art::ObjPtr<art::mirror::Object> obj ATTRIBUTE_UNUSED, |
| 418 | art::ObjPtr<art::mirror::Class> klass ATTRIBUTE_UNUSED, |
| 419 | art::ArtField& field, |
| 420 | size_t field_index, |
| 421 | void* user_data ATTRIBUTE_UNUSED) |
| 422 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 423 | LOG(ERROR) << (kStatic ? "static " : "instance ") |
| 424 | << (kRef ? "ref " : "primitive ") |
| 425 | << field.PrettyField() |
| 426 | << " @ " |
| 427 | << field_index; |
| 428 | return false; |
| 429 | } |
| 430 | }; |
| 431 | ATTRIBUTE_UNUSED |
| 432 | void DumpObjectFields(art::ObjPtr<art::mirror::Object> obj) |
| 433 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 434 | if (obj->IsClass()) { |
| 435 | FieldVisitor<decltype(DumpVisitor<true, false>::Callback), |
| 436 | decltype(DumpVisitor<true, true>::Callback), |
| 437 | decltype(DumpVisitor<false, false>::Callback), |
| 438 | decltype(DumpVisitor<false, true>::Callback), |
| 439 | void, |
| 440 | false>:: |
| 441 | ReportFields(obj, |
| 442 | nullptr, |
| 443 | DumpVisitor<true, false>::Callback, |
| 444 | DumpVisitor<true, true>::Callback, |
| 445 | DumpVisitor<false, false>::Callback, |
| 446 | DumpVisitor<false, true>::Callback); |
| 447 | } else { |
| 448 | FieldVisitor<decltype(DumpVisitor<true, false>::Callback), |
| 449 | decltype(DumpVisitor<true, true>::Callback), |
| 450 | decltype(DumpVisitor<false, false>::Callback), |
| 451 | decltype(DumpVisitor<false, true>::Callback), |
| 452 | void, |
| 453 | true>:: |
| 454 | ReportFields(obj, |
| 455 | nullptr, |
| 456 | DumpVisitor<true, false>::Callback, |
| 457 | DumpVisitor<true, true>::Callback, |
| 458 | DumpVisitor<false, false>::Callback, |
| 459 | DumpVisitor<false, true>::Callback); |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | class ReportPrimitiveField { |
| 464 | public: |
| 465 | static bool Report(art::ObjPtr<art::mirror::Object> obj, |
| 466 | ObjectTagTable* tag_table, |
| 467 | const jvmtiHeapCallbacks* cb, |
| 468 | const void* user_data) |
| 469 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 470 | if (UNLIKELY(cb->primitive_field_callback != nullptr)) { |
| 471 | jlong class_tag = tag_table->GetTagOrZero(obj->GetClass()); |
| 472 | ReportPrimitiveField rpf(tag_table, class_tag, cb, user_data); |
| 473 | if (obj->IsClass()) { |
| 474 | return FieldVisitor<decltype(ReportPrimitiveFieldCallback<true>), |
| 475 | decltype(VisitorFalse<ReportPrimitiveField>), |
| 476 | decltype(VisitorFalse<ReportPrimitiveField>), |
| 477 | decltype(VisitorFalse<ReportPrimitiveField>), |
| 478 | ReportPrimitiveField, |
| 479 | false>:: |
| 480 | ReportFields(obj, |
| 481 | &rpf, |
| 482 | ReportPrimitiveFieldCallback<true>, |
| 483 | VisitorFalse<ReportPrimitiveField>, |
| 484 | VisitorFalse<ReportPrimitiveField>, |
| 485 | VisitorFalse<ReportPrimitiveField>); |
| 486 | } else { |
| 487 | return FieldVisitor<decltype(VisitorFalse<ReportPrimitiveField>), |
| 488 | decltype(VisitorFalse<ReportPrimitiveField>), |
| 489 | decltype(ReportPrimitiveFieldCallback<false>), |
| 490 | decltype(VisitorFalse<ReportPrimitiveField>), |
| 491 | ReportPrimitiveField, |
| 492 | true>:: |
| 493 | ReportFields(obj, |
| 494 | &rpf, |
| 495 | VisitorFalse<ReportPrimitiveField>, |
| 496 | VisitorFalse<ReportPrimitiveField>, |
| 497 | ReportPrimitiveFieldCallback<false>, |
| 498 | VisitorFalse<ReportPrimitiveField>); |
| 499 | } |
| 500 | } |
| 501 | return false; |
| 502 | } |
| 503 | |
| 504 | |
| 505 | private: |
| 506 | ReportPrimitiveField(ObjectTagTable* tag_table, |
| 507 | jlong class_tag, |
| 508 | const jvmtiHeapCallbacks* cb, |
| 509 | const void* user_data) |
| 510 | : tag_table_(tag_table), class_tag_(class_tag), cb_(cb), user_data_(user_data) {} |
| 511 | |
| 512 | template <bool kReportStatic> |
| 513 | static bool ReportPrimitiveFieldCallback(art::ObjPtr<art::mirror::Object> obj, |
| 514 | art::ObjPtr<art::mirror::Class> klass, |
| 515 | art::ArtField& field, |
| 516 | size_t field_index, |
| 517 | ReportPrimitiveField* user_data) |
| 518 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 519 | art::Primitive::Type art_prim_type = field.GetTypeAsPrimitiveType(); |
| 520 | jvmtiPrimitiveType prim_type = |
| 521 | static_cast<jvmtiPrimitiveType>(art::Primitive::Descriptor(art_prim_type)[0]); |
| 522 | DCHECK(prim_type == JVMTI_PRIMITIVE_TYPE_BOOLEAN || |
| 523 | prim_type == JVMTI_PRIMITIVE_TYPE_BYTE || |
| 524 | prim_type == JVMTI_PRIMITIVE_TYPE_CHAR || |
| 525 | prim_type == JVMTI_PRIMITIVE_TYPE_SHORT || |
| 526 | prim_type == JVMTI_PRIMITIVE_TYPE_INT || |
| 527 | prim_type == JVMTI_PRIMITIVE_TYPE_LONG || |
| 528 | prim_type == JVMTI_PRIMITIVE_TYPE_FLOAT || |
| 529 | prim_type == JVMTI_PRIMITIVE_TYPE_DOUBLE); |
| 530 | jvmtiHeapReferenceInfo info; |
| 531 | info.field.index = field_index; |
| 532 | |
| 533 | jvalue value; |
| 534 | memset(&value, 0, sizeof(jvalue)); |
| 535 | art::ObjPtr<art::mirror::Object> src = kReportStatic ? klass : obj; |
| 536 | switch (art_prim_type) { |
| 537 | case art::Primitive::Type::kPrimBoolean: |
| 538 | value.z = field.GetBoolean(src) == 0 ? JNI_FALSE : JNI_TRUE; |
| 539 | break; |
| 540 | case art::Primitive::Type::kPrimByte: |
| 541 | value.b = field.GetByte(src); |
| 542 | break; |
| 543 | case art::Primitive::Type::kPrimChar: |
| 544 | value.c = field.GetChar(src); |
| 545 | break; |
| 546 | case art::Primitive::Type::kPrimShort: |
| 547 | value.s = field.GetShort(src); |
| 548 | break; |
| 549 | case art::Primitive::Type::kPrimInt: |
| 550 | value.i = field.GetInt(src); |
| 551 | break; |
| 552 | case art::Primitive::Type::kPrimLong: |
| 553 | value.j = field.GetLong(src); |
| 554 | break; |
| 555 | case art::Primitive::Type::kPrimFloat: |
| 556 | value.f = field.GetFloat(src); |
| 557 | break; |
| 558 | case art::Primitive::Type::kPrimDouble: |
| 559 | value.d = field.GetDouble(src); |
| 560 | break; |
| 561 | case art::Primitive::Type::kPrimVoid: |
| 562 | case art::Primitive::Type::kPrimNot: { |
| 563 | LOG(FATAL) << "Should not reach here"; |
| 564 | UNREACHABLE(); |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | jlong obj_tag = user_data->tag_table_->GetTagOrZero(src.Ptr()); |
| 569 | const jlong saved_obj_tag = obj_tag; |
| 570 | |
| 571 | jint ret = user_data->cb_->primitive_field_callback(kReportStatic |
| 572 | ? JVMTI_HEAP_REFERENCE_STATIC_FIELD |
| 573 | : JVMTI_HEAP_REFERENCE_FIELD, |
| 574 | &info, |
| 575 | user_data->class_tag_, |
| 576 | &obj_tag, |
| 577 | value, |
| 578 | prim_type, |
| 579 | const_cast<void*>(user_data->user_data_)); |
| 580 | |
| 581 | if (saved_obj_tag != obj_tag) { |
| 582 | user_data->tag_table_->Set(src.Ptr(), obj_tag); |
| 583 | } |
| 584 | |
| 585 | if ((ret & JVMTI_VISIT_ABORT) != 0) { |
| 586 | return true; |
| 587 | } |
| 588 | |
| 589 | return false; |
| 590 | } |
| 591 | |
| 592 | ObjectTagTable* tag_table_; |
| 593 | jlong class_tag_; |
| 594 | const jvmtiHeapCallbacks* cb_; |
| 595 | const void* user_data_; |
| 596 | }; |
| 597 | |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 598 | struct HeapFilter { |
| 599 | explicit HeapFilter(jint heap_filter) |
| 600 | : filter_out_tagged((heap_filter & JVMTI_HEAP_FILTER_TAGGED) != 0), |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 601 | filter_out_untagged((heap_filter & JVMTI_HEAP_FILTER_UNTAGGED) != 0), |
| 602 | filter_out_class_tagged((heap_filter & JVMTI_HEAP_FILTER_CLASS_TAGGED) != 0), |
| 603 | filter_out_class_untagged((heap_filter & JVMTI_HEAP_FILTER_CLASS_UNTAGGED) != 0), |
| 604 | any_filter(filter_out_tagged || |
| 605 | filter_out_untagged || |
| 606 | filter_out_class_tagged || |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 607 | filter_out_class_untagged) { |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 608 | } |
| 609 | |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 610 | bool ShouldReportByHeapFilter(jlong tag, jlong class_tag) const { |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 611 | if (!any_filter) { |
| 612 | return true; |
| 613 | } |
| 614 | |
| 615 | if ((tag == 0 && filter_out_untagged) || (tag != 0 && filter_out_tagged)) { |
| 616 | return false; |
| 617 | } |
| 618 | |
| 619 | if ((class_tag == 0 && filter_out_class_untagged) || |
| 620 | (class_tag != 0 && filter_out_class_tagged)) { |
| 621 | return false; |
| 622 | } |
| 623 | |
| 624 | return true; |
| 625 | } |
| 626 | |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 627 | const bool filter_out_tagged; |
| 628 | const bool filter_out_untagged; |
| 629 | const bool filter_out_class_tagged; |
| 630 | const bool filter_out_class_untagged; |
| 631 | const bool any_filter; |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 632 | }; |
| 633 | |
| 634 | } // namespace |
| 635 | |
| 636 | struct IterateThroughHeapData { |
| 637 | IterateThroughHeapData(HeapUtil* _heap_util, |
| 638 | jvmtiEnv* _env, |
| 639 | art::ObjPtr<art::mirror::Class> klass, |
| 640 | jint _heap_filter, |
| 641 | const jvmtiHeapCallbacks* _callbacks, |
| 642 | const void* _user_data) |
| 643 | : heap_util(_heap_util), |
| 644 | heap_filter(_heap_filter), |
| 645 | filter_klass(klass), |
| 646 | env(_env), |
| 647 | callbacks(_callbacks), |
| 648 | user_data(_user_data), |
| 649 | stop_reports(false) { |
| 650 | } |
| 651 | |
| 652 | HeapUtil* heap_util; |
| 653 | const HeapFilter heap_filter; |
| 654 | art::ObjPtr<art::mirror::Class> filter_klass; |
| 655 | jvmtiEnv* env; |
| 656 | const jvmtiHeapCallbacks* callbacks; |
| 657 | const void* user_data; |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 658 | |
| 659 | bool stop_reports; |
| 660 | }; |
| 661 | |
| 662 | static void IterateThroughHeapObjectCallback(art::mirror::Object* obj, void* arg) |
| 663 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 664 | IterateThroughHeapData* ithd = reinterpret_cast<IterateThroughHeapData*>(arg); |
| 665 | // Early return, as we can't really stop visiting. |
| 666 | if (ithd->stop_reports) { |
| 667 | return; |
| 668 | } |
| 669 | |
| 670 | art::ScopedAssertNoThreadSuspension no_suspension("IterateThroughHeapCallback"); |
| 671 | |
| 672 | jlong tag = 0; |
| 673 | ithd->heap_util->GetTags()->GetTag(obj, &tag); |
| 674 | |
| 675 | jlong class_tag = 0; |
| 676 | art::ObjPtr<art::mirror::Class> klass = obj->GetClass(); |
| 677 | ithd->heap_util->GetTags()->GetTag(klass.Ptr(), &class_tag); |
| 678 | // For simplicity, even if we find a tag = 0, assume 0 = not tagged. |
| 679 | |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 680 | if (!ithd->heap_filter.ShouldReportByHeapFilter(tag, class_tag)) { |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 681 | return; |
| 682 | } |
| 683 | |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 684 | if (ithd->filter_klass != nullptr) { |
| 685 | if (ithd->filter_klass != klass) { |
| 686 | return; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | jlong size = obj->SizeOf(); |
| 691 | |
| 692 | jint length = -1; |
| 693 | if (obj->IsArrayInstance()) { |
| 694 | length = obj->AsArray()->GetLength(); |
| 695 | } |
| 696 | |
| 697 | jlong saved_tag = tag; |
| 698 | jint ret = ithd->callbacks->heap_iteration_callback(class_tag, |
| 699 | size, |
| 700 | &tag, |
| 701 | length, |
| 702 | const_cast<void*>(ithd->user_data)); |
| 703 | |
| 704 | if (tag != saved_tag) { |
| 705 | ithd->heap_util->GetTags()->Set(obj, tag); |
| 706 | } |
| 707 | |
| 708 | ithd->stop_reports = (ret & JVMTI_VISIT_ABORT) != 0; |
| 709 | |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 710 | if (!ithd->stop_reports) { |
| 711 | jint string_ret = ReportString(obj, |
| 712 | ithd->env, |
| 713 | ithd->heap_util->GetTags(), |
| 714 | ithd->callbacks, |
| 715 | ithd->user_data); |
| 716 | ithd->stop_reports = (string_ret & JVMTI_VISIT_ABORT) != 0; |
| 717 | } |
| 718 | |
Andreas Gampe | becd6ad | 2017-02-22 19:20:37 -0800 | [diff] [blame] | 719 | if (!ithd->stop_reports) { |
| 720 | jint array_ret = ReportPrimitiveArray(obj, |
| 721 | ithd->env, |
| 722 | ithd->heap_util->GetTags(), |
| 723 | ithd->callbacks, |
| 724 | ithd->user_data); |
| 725 | ithd->stop_reports = (array_ret & JVMTI_VISIT_ABORT) != 0; |
| 726 | } |
| 727 | |
Andreas Gampe | e731693 | 2017-02-25 09:15:05 -0800 | [diff] [blame^] | 728 | if (!ithd->stop_reports) { |
| 729 | ithd->stop_reports = ReportPrimitiveField::Report(obj, |
| 730 | ithd->heap_util->GetTags(), |
| 731 | ithd->callbacks, |
| 732 | ithd->user_data); |
| 733 | } |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 734 | } |
| 735 | |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 736 | jvmtiError HeapUtil::IterateThroughHeap(jvmtiEnv* env, |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 737 | jint heap_filter, |
| 738 | jclass klass, |
| 739 | const jvmtiHeapCallbacks* callbacks, |
| 740 | const void* user_data) { |
| 741 | if (callbacks == nullptr) { |
| 742 | return ERR(NULL_POINTER); |
| 743 | } |
| 744 | |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 745 | art::Thread* self = art::Thread::Current(); |
| 746 | art::ScopedObjectAccess soa(self); // Now we know we have the shared lock. |
| 747 | |
| 748 | IterateThroughHeapData ithd(this, |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 749 | env, |
Nicolas Geoffray | 2cb576c | 2017-02-24 09:40:37 +0000 | [diff] [blame] | 750 | soa.Decode<art::mirror::Class>(klass), |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 751 | heap_filter, |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 752 | callbacks, |
| 753 | user_data); |
| 754 | |
| 755 | art::Runtime::Current()->GetHeap()->VisitObjects(IterateThroughHeapObjectCallback, &ithd); |
| 756 | |
| 757 | return ERR(NONE); |
| 758 | } |
| 759 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 760 | class FollowReferencesHelper FINAL { |
| 761 | public: |
| 762 | FollowReferencesHelper(HeapUtil* h, |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 763 | jvmtiEnv* jvmti_env, |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 764 | art::ObjPtr<art::mirror::Object> initial_object, |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 765 | const jvmtiHeapCallbacks* callbacks, |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 766 | art::ObjPtr<art::mirror::Class> class_filter, |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 767 | jint heap_filter, |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 768 | const void* user_data) |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 769 | : env(jvmti_env), |
| 770 | tag_table_(h->GetTags()), |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 771 | initial_object_(initial_object), |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 772 | callbacks_(callbacks), |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 773 | class_filter_(class_filter), |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 774 | heap_filter_(heap_filter), |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 775 | user_data_(user_data), |
| 776 | start_(0), |
| 777 | stop_reports_(false) { |
| 778 | } |
| 779 | |
| 780 | void Init() |
| 781 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 782 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 783 | if (initial_object_.IsNull()) { |
| 784 | CollectAndReportRootsVisitor carrv(this, tag_table_, &worklist_, &visited_); |
Andreas Gampe | f10dfcd | 2016-12-02 14:42:33 -0800 | [diff] [blame] | 785 | |
| 786 | // We need precise info (e.g., vregs). |
| 787 | constexpr art::VisitRootFlags kRootFlags = static_cast<art::VisitRootFlags>( |
| 788 | art::VisitRootFlags::kVisitRootFlagAllRoots | art::VisitRootFlags::kVisitRootFlagPrecise); |
| 789 | art::Runtime::Current()->VisitRoots(&carrv, kRootFlags); |
| 790 | |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 791 | art::Runtime::Current()->VisitImageRoots(&carrv); |
| 792 | stop_reports_ = carrv.IsStopReports(); |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 793 | |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 794 | if (stop_reports_) { |
| 795 | worklist_.clear(); |
| 796 | } |
| 797 | } else { |
| 798 | visited_.insert(initial_object_.Ptr()); |
| 799 | worklist_.push_back(initial_object_.Ptr()); |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 800 | } |
| 801 | } |
| 802 | |
| 803 | void Work() |
| 804 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 805 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 806 | // Currently implemented as a BFS. To lower overhead, we don't erase elements immediately |
| 807 | // from the head of the work list, instead postponing until there's a gap that's "large." |
| 808 | // |
| 809 | // Alternatively, we can implement a DFS and use the work list as a stack. |
| 810 | while (start_ < worklist_.size()) { |
| 811 | art::mirror::Object* cur_obj = worklist_[start_]; |
| 812 | start_++; |
| 813 | |
| 814 | if (start_ >= kMaxStart) { |
| 815 | worklist_.erase(worklist_.begin(), worklist_.begin() + start_); |
| 816 | start_ = 0; |
| 817 | } |
| 818 | |
| 819 | VisitObject(cur_obj); |
| 820 | |
| 821 | if (stop_reports_) { |
| 822 | break; |
| 823 | } |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | private: |
| 828 | class CollectAndReportRootsVisitor FINAL : public art::RootVisitor { |
| 829 | public: |
| 830 | CollectAndReportRootsVisitor(FollowReferencesHelper* helper, |
| 831 | ObjectTagTable* tag_table, |
| 832 | std::vector<art::mirror::Object*>* worklist, |
| 833 | std::unordered_set<art::mirror::Object*>* visited) |
| 834 | : helper_(helper), |
| 835 | tag_table_(tag_table), |
| 836 | worklist_(worklist), |
| 837 | visited_(visited), |
| 838 | stop_reports_(false) {} |
| 839 | |
| 840 | void VisitRoots(art::mirror::Object*** roots, size_t count, const art::RootInfo& info) |
| 841 | OVERRIDE |
| 842 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 843 | REQUIRES(!*helper_->tag_table_->GetAllowDisallowLock()) { |
| 844 | for (size_t i = 0; i != count; ++i) { |
| 845 | AddRoot(*roots[i], info); |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | void VisitRoots(art::mirror::CompressedReference<art::mirror::Object>** roots, |
| 850 | size_t count, |
| 851 | const art::RootInfo& info) |
| 852 | OVERRIDE REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 853 | REQUIRES(!*helper_->tag_table_->GetAllowDisallowLock()) { |
| 854 | for (size_t i = 0; i != count; ++i) { |
| 855 | AddRoot(roots[i]->AsMirrorPtr(), info); |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | bool IsStopReports() { |
| 860 | return stop_reports_; |
| 861 | } |
| 862 | |
| 863 | private: |
| 864 | void AddRoot(art::mirror::Object* root_obj, const art::RootInfo& info) |
| 865 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 866 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 867 | // We use visited_ to mark roots already so we do not need another set. |
| 868 | if (visited_->find(root_obj) == visited_->end()) { |
| 869 | visited_->insert(root_obj); |
| 870 | worklist_->push_back(root_obj); |
| 871 | } |
| 872 | ReportRoot(root_obj, info); |
| 873 | } |
| 874 | |
Andreas Gampe | 93c3090 | 2016-11-18 13:30:30 -0800 | [diff] [blame] | 875 | // Remove NO_THREAD_SAFETY_ANALYSIS once ASSERT_CAPABILITY works correctly. |
| 876 | art::Thread* FindThread(const art::RootInfo& info) NO_THREAD_SAFETY_ANALYSIS { |
| 877 | art::Locks::thread_list_lock_->AssertExclusiveHeld(art::Thread::Current()); |
| 878 | return art::Runtime::Current()->GetThreadList()->FindThreadByThreadId(info.GetThreadId()); |
| 879 | } |
| 880 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 881 | jvmtiHeapReferenceKind GetReferenceKind(const art::RootInfo& info, |
| 882 | jvmtiHeapReferenceInfo* ref_info) |
| 883 | REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 884 | // TODO: Fill in ref_info. |
| 885 | memset(ref_info, 0, sizeof(jvmtiHeapReferenceInfo)); |
| 886 | |
| 887 | switch (info.GetType()) { |
| 888 | case art::RootType::kRootJNIGlobal: |
| 889 | return JVMTI_HEAP_REFERENCE_JNI_GLOBAL; |
| 890 | |
| 891 | case art::RootType::kRootJNILocal: |
Andreas Gampe | 93c3090 | 2016-11-18 13:30:30 -0800 | [diff] [blame] | 892 | { |
| 893 | uint32_t thread_id = info.GetThreadId(); |
| 894 | ref_info->jni_local.thread_id = thread_id; |
| 895 | |
| 896 | art::Thread* thread = FindThread(info); |
| 897 | if (thread != nullptr) { |
Andreas Gampe | 202f85a | 2017-02-06 10:23:26 -0800 | [diff] [blame] | 898 | art::mirror::Object* thread_obj; |
Andreas Gampe | 93c3090 | 2016-11-18 13:30:30 -0800 | [diff] [blame] | 899 | if (thread->IsStillStarting()) { |
| 900 | thread_obj = nullptr; |
| 901 | } else { |
Andreas Gampe | 202f85a | 2017-02-06 10:23:26 -0800 | [diff] [blame] | 902 | thread_obj = thread->GetPeerFromOtherThread(); |
Andreas Gampe | 93c3090 | 2016-11-18 13:30:30 -0800 | [diff] [blame] | 903 | } |
| 904 | if (thread_obj != nullptr) { |
| 905 | ref_info->jni_local.thread_tag = tag_table_->GetTagOrZero(thread_obj); |
| 906 | } |
| 907 | } |
| 908 | |
| 909 | // TODO: We don't have this info. |
| 910 | if (thread != nullptr) { |
| 911 | ref_info->jni_local.depth = 0; |
| 912 | art::ArtMethod* method = thread->GetCurrentMethod(nullptr, false /* abort_on_error */); |
| 913 | if (method != nullptr) { |
| 914 | ref_info->jni_local.method = art::jni::EncodeArtMethod(method); |
| 915 | } |
| 916 | } |
| 917 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 918 | return JVMTI_HEAP_REFERENCE_JNI_LOCAL; |
Andreas Gampe | 93c3090 | 2016-11-18 13:30:30 -0800 | [diff] [blame] | 919 | } |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 920 | |
| 921 | case art::RootType::kRootJavaFrame: |
Andreas Gampe | f10dfcd | 2016-12-02 14:42:33 -0800 | [diff] [blame] | 922 | { |
| 923 | uint32_t thread_id = info.GetThreadId(); |
| 924 | ref_info->stack_local.thread_id = thread_id; |
| 925 | |
| 926 | art::Thread* thread = FindThread(info); |
| 927 | if (thread != nullptr) { |
Andreas Gampe | 202f85a | 2017-02-06 10:23:26 -0800 | [diff] [blame] | 928 | art::mirror::Object* thread_obj; |
Andreas Gampe | f10dfcd | 2016-12-02 14:42:33 -0800 | [diff] [blame] | 929 | if (thread->IsStillStarting()) { |
| 930 | thread_obj = nullptr; |
| 931 | } else { |
Andreas Gampe | 202f85a | 2017-02-06 10:23:26 -0800 | [diff] [blame] | 932 | thread_obj = thread->GetPeerFromOtherThread(); |
Andreas Gampe | f10dfcd | 2016-12-02 14:42:33 -0800 | [diff] [blame] | 933 | } |
| 934 | if (thread_obj != nullptr) { |
| 935 | ref_info->stack_local.thread_tag = tag_table_->GetTagOrZero(thread_obj); |
| 936 | } |
| 937 | } |
| 938 | |
| 939 | auto& java_info = static_cast<const art::JavaFrameRootInfo&>(info); |
| 940 | ref_info->stack_local.slot = static_cast<jint>(java_info.GetVReg()); |
| 941 | const art::StackVisitor* visitor = java_info.GetVisitor(); |
| 942 | ref_info->stack_local.location = |
| 943 | static_cast<jlocation>(visitor->GetDexPc(false /* abort_on_failure */)); |
| 944 | ref_info->stack_local.depth = static_cast<jint>(visitor->GetFrameDepth()); |
| 945 | art::ArtMethod* method = visitor->GetMethod(); |
| 946 | if (method != nullptr) { |
| 947 | ref_info->stack_local.method = art::jni::EncodeArtMethod(method); |
| 948 | } |
| 949 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 950 | return JVMTI_HEAP_REFERENCE_STACK_LOCAL; |
Andreas Gampe | f10dfcd | 2016-12-02 14:42:33 -0800 | [diff] [blame] | 951 | } |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 952 | |
| 953 | case art::RootType::kRootNativeStack: |
| 954 | case art::RootType::kRootThreadBlock: |
| 955 | case art::RootType::kRootThreadObject: |
| 956 | return JVMTI_HEAP_REFERENCE_THREAD; |
| 957 | |
| 958 | case art::RootType::kRootStickyClass: |
| 959 | case art::RootType::kRootInternedString: |
| 960 | // Note: this isn't a root in the RI. |
| 961 | return JVMTI_HEAP_REFERENCE_SYSTEM_CLASS; |
| 962 | |
| 963 | case art::RootType::kRootMonitorUsed: |
| 964 | case art::RootType::kRootJNIMonitor: |
| 965 | return JVMTI_HEAP_REFERENCE_MONITOR; |
| 966 | |
| 967 | case art::RootType::kRootFinalizing: |
| 968 | case art::RootType::kRootDebugger: |
| 969 | case art::RootType::kRootReferenceCleanup: |
| 970 | case art::RootType::kRootVMInternal: |
| 971 | case art::RootType::kRootUnknown: |
| 972 | return JVMTI_HEAP_REFERENCE_OTHER; |
| 973 | } |
| 974 | LOG(FATAL) << "Unreachable"; |
| 975 | UNREACHABLE(); |
| 976 | } |
| 977 | |
| 978 | void ReportRoot(art::mirror::Object* root_obj, const art::RootInfo& info) |
| 979 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 980 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 981 | jvmtiHeapReferenceInfo ref_info; |
| 982 | jvmtiHeapReferenceKind kind = GetReferenceKind(info, &ref_info); |
| 983 | jint result = helper_->ReportReference(kind, &ref_info, nullptr, root_obj); |
| 984 | if ((result & JVMTI_VISIT_ABORT) != 0) { |
| 985 | stop_reports_ = true; |
| 986 | } |
| 987 | } |
| 988 | |
| 989 | private: |
| 990 | FollowReferencesHelper* helper_; |
| 991 | ObjectTagTable* tag_table_; |
| 992 | std::vector<art::mirror::Object*>* worklist_; |
| 993 | std::unordered_set<art::mirror::Object*>* visited_; |
| 994 | bool stop_reports_; |
| 995 | }; |
| 996 | |
| 997 | void VisitObject(art::mirror::Object* obj) |
| 998 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 999 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 1000 | if (obj->IsClass()) { |
| 1001 | VisitClass(obj->AsClass()); |
| 1002 | return; |
| 1003 | } |
| 1004 | if (obj->IsArrayInstance()) { |
| 1005 | VisitArray(obj); |
| 1006 | return; |
| 1007 | } |
| 1008 | |
| 1009 | // TODO: We'll probably have to rewrite this completely with our own visiting logic, if we |
| 1010 | // want to have a chance of getting the field indices computed halfway efficiently. For |
| 1011 | // now, ignore them altogether. |
| 1012 | |
| 1013 | struct InstanceReferenceVisitor { |
| 1014 | explicit InstanceReferenceVisitor(FollowReferencesHelper* helper_) |
| 1015 | : helper(helper_), stop_reports(false) {} |
| 1016 | |
| 1017 | void operator()(art::mirror::Object* src, |
| 1018 | art::MemberOffset field_offset, |
| 1019 | bool is_static ATTRIBUTE_UNUSED) const |
| 1020 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 1021 | REQUIRES(!*helper->tag_table_->GetAllowDisallowLock()) { |
| 1022 | if (stop_reports) { |
| 1023 | return; |
| 1024 | } |
| 1025 | |
| 1026 | art::mirror::Object* trg = src->GetFieldObjectReferenceAddr(field_offset)->AsMirrorPtr(); |
| 1027 | jvmtiHeapReferenceInfo reference_info; |
| 1028 | memset(&reference_info, 0, sizeof(reference_info)); |
| 1029 | |
| 1030 | // TODO: Implement spec-compliant numbering. |
| 1031 | reference_info.field.index = field_offset.Int32Value(); |
| 1032 | |
| 1033 | jvmtiHeapReferenceKind kind = |
| 1034 | field_offset.Int32Value() == art::mirror::Object::ClassOffset().Int32Value() |
| 1035 | ? JVMTI_HEAP_REFERENCE_CLASS |
| 1036 | : JVMTI_HEAP_REFERENCE_FIELD; |
| 1037 | const jvmtiHeapReferenceInfo* reference_info_ptr = |
| 1038 | kind == JVMTI_HEAP_REFERENCE_CLASS ? nullptr : &reference_info; |
| 1039 | |
| 1040 | stop_reports = !helper->ReportReferenceMaybeEnqueue(kind, reference_info_ptr, src, trg); |
| 1041 | } |
| 1042 | |
| 1043 | void VisitRoot(art::mirror::CompressedReference<art::mirror::Object>* root ATTRIBUTE_UNUSED) |
| 1044 | const { |
| 1045 | LOG(FATAL) << "Unreachable"; |
| 1046 | } |
| 1047 | void VisitRootIfNonNull( |
| 1048 | art::mirror::CompressedReference<art::mirror::Object>* root ATTRIBUTE_UNUSED) const { |
| 1049 | LOG(FATAL) << "Unreachable"; |
| 1050 | } |
| 1051 | |
| 1052 | // "mutable" required by the visitor API. |
| 1053 | mutable FollowReferencesHelper* helper; |
| 1054 | mutable bool stop_reports; |
| 1055 | }; |
| 1056 | |
| 1057 | InstanceReferenceVisitor visitor(this); |
| 1058 | // Visit references, not native roots. |
| 1059 | obj->VisitReferences<false>(visitor, art::VoidFunctor()); |
| 1060 | |
| 1061 | stop_reports_ = visitor.stop_reports; |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 1062 | |
| 1063 | if (!stop_reports_) { |
| 1064 | jint string_ret = ReportString(obj, env, tag_table_, callbacks_, user_data_); |
| 1065 | stop_reports_ = (string_ret & JVMTI_VISIT_ABORT) != 0; |
| 1066 | } |
Andreas Gampe | e731693 | 2017-02-25 09:15:05 -0800 | [diff] [blame^] | 1067 | |
| 1068 | if (!stop_reports_) { |
| 1069 | stop_reports_ = ReportPrimitiveField::Report(obj, tag_table_, callbacks_, user_data_); |
| 1070 | } |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
| 1073 | void VisitArray(art::mirror::Object* array) |
| 1074 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 1075 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 1076 | stop_reports_ = !ReportReferenceMaybeEnqueue(JVMTI_HEAP_REFERENCE_CLASS, |
| 1077 | nullptr, |
| 1078 | array, |
| 1079 | array->GetClass()); |
| 1080 | if (stop_reports_) { |
| 1081 | return; |
| 1082 | } |
| 1083 | |
| 1084 | if (array->IsObjectArray()) { |
| 1085 | art::mirror::ObjectArray<art::mirror::Object>* obj_array = |
| 1086 | array->AsObjectArray<art::mirror::Object>(); |
| 1087 | int32_t length = obj_array->GetLength(); |
| 1088 | for (int32_t i = 0; i != length; ++i) { |
| 1089 | art::mirror::Object* elem = obj_array->GetWithoutChecks(i); |
| 1090 | if (elem != nullptr) { |
| 1091 | jvmtiHeapReferenceInfo reference_info; |
| 1092 | reference_info.array.index = i; |
| 1093 | stop_reports_ = !ReportReferenceMaybeEnqueue(JVMTI_HEAP_REFERENCE_ARRAY_ELEMENT, |
| 1094 | &reference_info, |
| 1095 | array, |
| 1096 | elem); |
| 1097 | if (stop_reports_) { |
| 1098 | break; |
| 1099 | } |
| 1100 | } |
| 1101 | } |
Andreas Gampe | becd6ad | 2017-02-22 19:20:37 -0800 | [diff] [blame] | 1102 | } else { |
| 1103 | if (!stop_reports_) { |
| 1104 | jint array_ret = ReportPrimitiveArray(array, env, tag_table_, callbacks_, user_data_); |
| 1105 | stop_reports_ = (array_ret & JVMTI_VISIT_ABORT) != 0; |
| 1106 | } |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | void VisitClass(art::mirror::Class* klass) |
| 1111 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 1112 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 1113 | // TODO: Are erroneous classes reported? Are non-prepared ones? For now, just use resolved ones. |
| 1114 | if (!klass->IsResolved()) { |
| 1115 | return; |
| 1116 | } |
| 1117 | |
| 1118 | // Superclass. |
| 1119 | stop_reports_ = !ReportReferenceMaybeEnqueue(JVMTI_HEAP_REFERENCE_SUPERCLASS, |
| 1120 | nullptr, |
| 1121 | klass, |
| 1122 | klass->GetSuperClass()); |
| 1123 | if (stop_reports_) { |
| 1124 | return; |
| 1125 | } |
| 1126 | |
| 1127 | // Directly implemented or extended interfaces. |
| 1128 | art::Thread* self = art::Thread::Current(); |
| 1129 | art::StackHandleScope<1> hs(self); |
| 1130 | art::Handle<art::mirror::Class> h_klass(hs.NewHandle<art::mirror::Class>(klass)); |
| 1131 | for (size_t i = 0; i < h_klass->NumDirectInterfaces(); ++i) { |
| 1132 | art::ObjPtr<art::mirror::Class> inf_klass = |
Vladimir Marko | 19a4d37 | 2016-12-08 14:41:46 +0000 | [diff] [blame] | 1133 | art::mirror::Class::ResolveDirectInterface(self, h_klass, i); |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1134 | if (inf_klass == nullptr) { |
| 1135 | // TODO: With a resolved class this should not happen... |
| 1136 | self->ClearException(); |
| 1137 | break; |
| 1138 | } |
| 1139 | |
| 1140 | stop_reports_ = !ReportReferenceMaybeEnqueue(JVMTI_HEAP_REFERENCE_INTERFACE, |
| 1141 | nullptr, |
| 1142 | klass, |
| 1143 | inf_klass.Ptr()); |
| 1144 | if (stop_reports_) { |
| 1145 | return; |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | // Classloader. |
| 1150 | // TODO: What about the boot classpath loader? We'll skip for now, but do we have to find the |
| 1151 | // fake BootClassLoader? |
| 1152 | if (klass->GetClassLoader() != nullptr) { |
| 1153 | stop_reports_ = !ReportReferenceMaybeEnqueue(JVMTI_HEAP_REFERENCE_CLASS_LOADER, |
| 1154 | nullptr, |
| 1155 | klass, |
| 1156 | klass->GetClassLoader()); |
| 1157 | if (stop_reports_) { |
| 1158 | return; |
| 1159 | } |
| 1160 | } |
| 1161 | DCHECK_EQ(h_klass.Get(), klass); |
| 1162 | |
| 1163 | // Declared static fields. |
| 1164 | for (auto& field : klass->GetSFields()) { |
| 1165 | if (!field.IsPrimitiveType()) { |
| 1166 | art::ObjPtr<art::mirror::Object> field_value = field.GetObject(klass); |
| 1167 | if (field_value != nullptr) { |
| 1168 | jvmtiHeapReferenceInfo reference_info; |
| 1169 | memset(&reference_info, 0, sizeof(reference_info)); |
| 1170 | |
| 1171 | // TODO: Implement spec-compliant numbering. |
| 1172 | reference_info.field.index = field.GetOffset().Int32Value(); |
| 1173 | |
| 1174 | stop_reports_ = !ReportReferenceMaybeEnqueue(JVMTI_HEAP_REFERENCE_STATIC_FIELD, |
| 1175 | &reference_info, |
| 1176 | klass, |
| 1177 | field_value.Ptr()); |
| 1178 | if (stop_reports_) { |
| 1179 | return; |
| 1180 | } |
| 1181 | } |
| 1182 | } |
| 1183 | } |
Andreas Gampe | e731693 | 2017-02-25 09:15:05 -0800 | [diff] [blame^] | 1184 | |
| 1185 | if (!stop_reports_) { |
| 1186 | stop_reports_ = ReportPrimitiveField::Report(klass, tag_table_, callbacks_, user_data_); |
| 1187 | } |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1188 | } |
| 1189 | |
| 1190 | void MaybeEnqueue(art::mirror::Object* obj) REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 1191 | if (visited_.find(obj) == visited_.end()) { |
| 1192 | worklist_.push_back(obj); |
| 1193 | visited_.insert(obj); |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | bool ReportReferenceMaybeEnqueue(jvmtiHeapReferenceKind kind, |
| 1198 | const jvmtiHeapReferenceInfo* reference_info, |
| 1199 | art::mirror::Object* referree, |
| 1200 | art::mirror::Object* referrer) |
| 1201 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 1202 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 1203 | jint result = ReportReference(kind, reference_info, referree, referrer); |
| 1204 | if ((result & JVMTI_VISIT_ABORT) == 0) { |
| 1205 | if ((result & JVMTI_VISIT_OBJECTS) != 0) { |
| 1206 | MaybeEnqueue(referrer); |
| 1207 | } |
| 1208 | return true; |
| 1209 | } else { |
| 1210 | return false; |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | jint ReportReference(jvmtiHeapReferenceKind kind, |
| 1215 | const jvmtiHeapReferenceInfo* reference_info, |
| 1216 | art::mirror::Object* referrer, |
| 1217 | art::mirror::Object* referree) |
| 1218 | REQUIRES_SHARED(art::Locks::mutator_lock_) |
| 1219 | REQUIRES(!*tag_table_->GetAllowDisallowLock()) { |
| 1220 | if (referree == nullptr || stop_reports_) { |
| 1221 | return 0; |
| 1222 | } |
| 1223 | |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 1224 | if (UNLIKELY(class_filter_ != nullptr) && class_filter_ != referree->GetClass()) { |
| 1225 | return JVMTI_VISIT_OBJECTS; |
| 1226 | } |
| 1227 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1228 | const jlong class_tag = tag_table_->GetTagOrZero(referree->GetClass()); |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 1229 | jlong tag = tag_table_->GetTagOrZero(referree); |
| 1230 | |
| 1231 | if (!heap_filter_.ShouldReportByHeapFilter(tag, class_tag)) { |
| 1232 | return JVMTI_VISIT_OBJECTS; |
| 1233 | } |
| 1234 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1235 | const jlong referrer_class_tag = |
| 1236 | referrer == nullptr ? 0 : tag_table_->GetTagOrZero(referrer->GetClass()); |
| 1237 | const jlong size = static_cast<jlong>(referree->SizeOf()); |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1238 | jlong saved_tag = tag; |
| 1239 | jlong referrer_tag = 0; |
| 1240 | jlong saved_referrer_tag = 0; |
| 1241 | jlong* referrer_tag_ptr; |
| 1242 | if (referrer == nullptr) { |
| 1243 | referrer_tag_ptr = nullptr; |
| 1244 | } else { |
| 1245 | if (referrer == referree) { |
| 1246 | referrer_tag_ptr = &tag; |
| 1247 | } else { |
| 1248 | referrer_tag = saved_referrer_tag = tag_table_->GetTagOrZero(referrer); |
| 1249 | referrer_tag_ptr = &referrer_tag; |
| 1250 | } |
| 1251 | } |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 1252 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1253 | jint length = -1; |
| 1254 | if (referree->IsArrayInstance()) { |
| 1255 | length = referree->AsArray()->GetLength(); |
| 1256 | } |
| 1257 | |
| 1258 | jint result = callbacks_->heap_reference_callback(kind, |
| 1259 | reference_info, |
| 1260 | class_tag, |
| 1261 | referrer_class_tag, |
| 1262 | size, |
| 1263 | &tag, |
| 1264 | referrer_tag_ptr, |
| 1265 | length, |
| 1266 | const_cast<void*>(user_data_)); |
| 1267 | |
| 1268 | if (tag != saved_tag) { |
| 1269 | tag_table_->Set(referree, tag); |
| 1270 | } |
| 1271 | if (referrer_tag != saved_referrer_tag) { |
| 1272 | tag_table_->Set(referrer, referrer_tag); |
| 1273 | } |
| 1274 | |
| 1275 | return result; |
| 1276 | } |
| 1277 | |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 1278 | jvmtiEnv* env; |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1279 | ObjectTagTable* tag_table_; |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 1280 | art::ObjPtr<art::mirror::Object> initial_object_; |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1281 | const jvmtiHeapCallbacks* callbacks_; |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 1282 | art::ObjPtr<art::mirror::Class> class_filter_; |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 1283 | const HeapFilter heap_filter_; |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1284 | const void* user_data_; |
| 1285 | |
| 1286 | std::vector<art::mirror::Object*> worklist_; |
| 1287 | size_t start_; |
| 1288 | static constexpr size_t kMaxStart = 1000000U; |
| 1289 | |
| 1290 | std::unordered_set<art::mirror::Object*> visited_; |
| 1291 | |
| 1292 | bool stop_reports_; |
| 1293 | |
| 1294 | friend class CollectAndReportRootsVisitor; |
| 1295 | }; |
| 1296 | |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 1297 | jvmtiError HeapUtil::FollowReferences(jvmtiEnv* env, |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 1298 | jint heap_filter, |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 1299 | jclass klass, |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1300 | jobject initial_object, |
| 1301 | const jvmtiHeapCallbacks* callbacks, |
| 1302 | const void* user_data) { |
| 1303 | if (callbacks == nullptr) { |
| 1304 | return ERR(NULL_POINTER); |
| 1305 | } |
| 1306 | |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1307 | art::Thread* self = art::Thread::Current(); |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1308 | |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 1309 | art::gc::Heap* heap = art::Runtime::Current()->GetHeap(); |
| 1310 | if (heap->IsGcConcurrentAndMoving()) { |
| 1311 | // Need to take a heap dump while GC isn't running. See the |
| 1312 | // comment in Heap::VisitObjects(). |
| 1313 | heap->IncrementDisableMovingGC(self); |
| 1314 | } |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1315 | { |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 1316 | art::ScopedObjectAccess soa(self); // Now we know we have the shared lock. |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1317 | art::ScopedThreadSuspension sts(self, art::kWaitingForVisitObjects); |
| 1318 | art::ScopedSuspendAll ssa("FollowReferences"); |
| 1319 | |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 1320 | art::ObjPtr<art::mirror::Class> class_filter = klass == nullptr |
| 1321 | ? nullptr |
| 1322 | : art::ObjPtr<art::mirror::Class>::DownCast(self->DecodeJObject(klass)); |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 1323 | FollowReferencesHelper frh(this, |
Andreas Gampe | 3ec8e40 | 2017-02-21 15:49:53 -0800 | [diff] [blame] | 1324 | env, |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 1325 | self->DecodeJObject(initial_object), |
| 1326 | callbacks, |
Andreas Gampe | 38da9f2 | 2017-02-20 13:35:36 -0800 | [diff] [blame] | 1327 | class_filter, |
Andreas Gampe | 6ea0607 | 2017-02-24 18:01:19 +0000 | [diff] [blame] | 1328 | heap_filter, |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 1329 | user_data); |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1330 | frh.Init(); |
| 1331 | frh.Work(); |
| 1332 | } |
Andreas Gampe | 638a693 | 2016-12-02 19:11:17 -0800 | [diff] [blame] | 1333 | if (heap->IsGcConcurrentAndMoving()) { |
| 1334 | heap->DecrementDisableMovingGC(self); |
| 1335 | } |
Andreas Gampe | 70bfc8a | 2016-11-03 11:04:15 -0700 | [diff] [blame] | 1336 | |
| 1337 | return ERR(NONE); |
| 1338 | } |
| 1339 | |
Andreas Gampe | aa8b60c | 2016-10-12 12:51:25 -0700 | [diff] [blame] | 1340 | jvmtiError HeapUtil::GetLoadedClasses(jvmtiEnv* env, |
| 1341 | jint* class_count_ptr, |
| 1342 | jclass** classes_ptr) { |
| 1343 | if (class_count_ptr == nullptr || classes_ptr == nullptr) { |
| 1344 | return ERR(NULL_POINTER); |
| 1345 | } |
| 1346 | |
| 1347 | class ReportClassVisitor : public art::ClassVisitor { |
| 1348 | public: |
| 1349 | explicit ReportClassVisitor(art::Thread* self) : self_(self) {} |
| 1350 | |
Mathieu Chartier | 28357fa | 2016-10-18 16:27:40 -0700 | [diff] [blame] | 1351 | bool operator()(art::ObjPtr<art::mirror::Class> klass) |
| 1352 | OVERRIDE REQUIRES_SHARED(art::Locks::mutator_lock_) { |
Andreas Gampe | ef54d8d | 2016-10-25 09:55:53 -0700 | [diff] [blame] | 1353 | classes_.push_back(self_->GetJniEnv()->AddLocalReference<jclass>(klass)); |
Andreas Gampe | aa8b60c | 2016-10-12 12:51:25 -0700 | [diff] [blame] | 1354 | return true; |
| 1355 | } |
| 1356 | |
| 1357 | art::Thread* self_; |
| 1358 | std::vector<jclass> classes_; |
| 1359 | }; |
| 1360 | |
| 1361 | art::Thread* self = art::Thread::Current(); |
| 1362 | ReportClassVisitor rcv(self); |
| 1363 | { |
| 1364 | art::ScopedObjectAccess soa(self); |
| 1365 | art::Runtime::Current()->GetClassLinker()->VisitClasses(&rcv); |
| 1366 | } |
| 1367 | |
| 1368 | size_t size = rcv.classes_.size(); |
| 1369 | jclass* classes = nullptr; |
| 1370 | jvmtiError alloc_ret = env->Allocate(static_cast<jlong>(size * sizeof(jclass)), |
| 1371 | reinterpret_cast<unsigned char**>(&classes)); |
| 1372 | if (alloc_ret != ERR(NONE)) { |
| 1373 | return alloc_ret; |
| 1374 | } |
| 1375 | |
| 1376 | for (size_t i = 0; i < size; ++i) { |
| 1377 | classes[i] = rcv.classes_[i]; |
| 1378 | } |
| 1379 | *classes_ptr = classes; |
| 1380 | *class_count_ptr = static_cast<jint>(size); |
| 1381 | |
| 1382 | return ERR(NONE); |
| 1383 | } |
| 1384 | |
Andreas Gampe | 8da6d03 | 2016-10-31 19:31:03 -0700 | [diff] [blame] | 1385 | jvmtiError HeapUtil::ForceGarbageCollection(jvmtiEnv* env ATTRIBUTE_UNUSED) { |
| 1386 | art::Runtime::Current()->GetHeap()->CollectGarbage(false); |
| 1387 | |
| 1388 | return ERR(NONE); |
| 1389 | } |
Andreas Gampe | e54d992 | 2016-10-11 19:55:37 -0700 | [diff] [blame] | 1390 | } // namespace openjdkjvmti |