Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 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 <jni.h> |
| 18 | #include <stdio.h> |
| 19 | #include <iostream> |
| 20 | #include <fstream> |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 21 | #include <memory> |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 22 | #include <stdio.h> |
| 23 | #include <sstream> |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 24 | #include <strstream> |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 25 | |
| 26 | #include "jvmti.h" |
| 27 | #include "exec_utils.h" |
| 28 | #include "utils.h" |
| 29 | |
| 30 | namespace art { |
| 31 | |
| 32 | // Should we do a 'full_rewrite' with this test? |
| 33 | static constexpr bool kDoFullRewrite = true; |
| 34 | |
| 35 | struct StressData { |
| 36 | std::string dexter_cmd; |
| 37 | std::string out_temp_dex; |
| 38 | std::string in_temp_dex; |
| 39 | bool vm_class_loader_initialized; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 40 | bool trace_stress; |
| 41 | bool redefine_stress; |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 42 | bool field_stress; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 43 | }; |
| 44 | |
| 45 | static void WriteToFile(const std::string& fname, jint data_len, const unsigned char* data) { |
| 46 | std::ofstream file(fname, std::ios::binary | std::ios::out | std::ios::trunc); |
| 47 | file.write(reinterpret_cast<const char*>(data), data_len); |
| 48 | file.flush(); |
| 49 | } |
| 50 | |
| 51 | static bool ReadIntoBuffer(const std::string& fname, /*out*/std::vector<unsigned char>* data) { |
| 52 | std::ifstream file(fname, std::ios::binary | std::ios::in); |
| 53 | file.seekg(0, std::ios::end); |
| 54 | size_t len = file.tellg(); |
| 55 | data->resize(len); |
| 56 | file.seekg(0); |
| 57 | file.read(reinterpret_cast<char*>(data->data()), len); |
| 58 | return len != 0; |
| 59 | } |
| 60 | |
| 61 | // TODO rewrite later. |
| 62 | static bool DoExtractClassFromData(StressData* data, |
| 63 | const std::string& class_name, |
| 64 | jint in_len, |
| 65 | const unsigned char* in_data, |
| 66 | /*out*/std::vector<unsigned char>* dex) { |
| 67 | // Write the dex file into a temporary file. |
| 68 | WriteToFile(data->in_temp_dex, in_len, in_data); |
| 69 | // Clear out file so even if something suppresses the exit value we will still detect dexter |
| 70 | // failure. |
| 71 | WriteToFile(data->out_temp_dex, 0, nullptr); |
| 72 | // Have dexter do the extraction. |
| 73 | std::vector<std::string> args; |
| 74 | args.push_back(data->dexter_cmd); |
| 75 | if (kDoFullRewrite) { |
| 76 | args.push_back("-x"); |
| 77 | args.push_back("full_rewrite"); |
| 78 | } |
| 79 | args.push_back("-e"); |
| 80 | args.push_back(class_name); |
| 81 | args.push_back("-o"); |
| 82 | args.push_back(data->out_temp_dex); |
| 83 | args.push_back(data->in_temp_dex); |
| 84 | std::string error; |
| 85 | if (ExecAndReturnCode(args, &error) != 0) { |
| 86 | LOG(ERROR) << "unable to execute dexter: " << error; |
| 87 | return false; |
| 88 | } |
| 89 | return ReadIntoBuffer(data->out_temp_dex, dex); |
| 90 | } |
| 91 | |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 92 | class ScopedThreadInfo { |
| 93 | public: |
| 94 | ScopedThreadInfo(jvmtiEnv* jvmtienv, JNIEnv* env, jthread thread) |
| 95 | : jvmtienv_(jvmtienv), env_(env), free_name_(false) { |
| 96 | memset(&info_, 0, sizeof(info_)); |
| 97 | if (thread == nullptr) { |
| 98 | info_.name = const_cast<char*>("<NULLPTR>"); |
| 99 | } else if (jvmtienv->GetThreadInfo(thread, &info_) != JVMTI_ERROR_NONE) { |
| 100 | info_.name = const_cast<char*>("<UNKNOWN THREAD>"); |
| 101 | } else { |
| 102 | free_name_ = true; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | ~ScopedThreadInfo() { |
| 107 | if (free_name_) { |
| 108 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(info_.name)); |
| 109 | } |
| 110 | env_->DeleteLocalRef(info_.thread_group); |
| 111 | env_->DeleteLocalRef(info_.context_class_loader); |
| 112 | } |
| 113 | |
| 114 | const char* GetName() const { |
| 115 | return info_.name; |
| 116 | } |
| 117 | |
| 118 | private: |
| 119 | jvmtiEnv* jvmtienv_; |
| 120 | JNIEnv* env_; |
| 121 | bool free_name_; |
| 122 | jvmtiThreadInfo info_; |
| 123 | }; |
| 124 | |
| 125 | class ScopedClassInfo { |
| 126 | public: |
| 127 | ScopedClassInfo(jvmtiEnv* jvmtienv, jclass c) |
| 128 | : jvmtienv_(jvmtienv), |
| 129 | class_(c), |
| 130 | name_(nullptr), |
| 131 | generic_(nullptr) {} |
| 132 | |
| 133 | ~ScopedClassInfo() { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 134 | if (class_ != nullptr) { |
| 135 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 136 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
| 137 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | bool Init() { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 141 | if (class_ == nullptr) { |
| 142 | name_ = const_cast<char*>("<NONE>"); |
| 143 | generic_ = const_cast<char*>("<NONE>"); |
| 144 | return true; |
| 145 | } else { |
| 146 | return jvmtienv_->GetClassSignature(class_, &name_, &generic_) == JVMTI_ERROR_NONE; |
| 147 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | jclass GetClass() const { |
| 151 | return class_; |
| 152 | } |
| 153 | const char* GetName() const { |
| 154 | return name_; |
| 155 | } |
| 156 | const char* GetGeneric() const { |
| 157 | return generic_; |
| 158 | } |
| 159 | |
| 160 | private: |
| 161 | jvmtiEnv* jvmtienv_; |
| 162 | jclass class_; |
| 163 | char* name_; |
| 164 | char* generic_; |
| 165 | }; |
| 166 | |
| 167 | class ScopedMethodInfo { |
| 168 | public: |
| 169 | ScopedMethodInfo(jvmtiEnv* jvmtienv, JNIEnv* env, jmethodID m) |
| 170 | : jvmtienv_(jvmtienv), |
| 171 | env_(env), |
| 172 | method_(m), |
| 173 | declaring_class_(nullptr), |
| 174 | class_info_(nullptr), |
| 175 | name_(nullptr), |
| 176 | signature_(nullptr), |
| 177 | generic_(nullptr) {} |
| 178 | |
| 179 | ~ScopedMethodInfo() { |
| 180 | env_->DeleteLocalRef(declaring_class_); |
| 181 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 182 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(signature_)); |
| 183 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
| 184 | } |
| 185 | |
| 186 | bool Init() { |
| 187 | if (jvmtienv_->GetMethodDeclaringClass(method_, &declaring_class_) != JVMTI_ERROR_NONE) { |
| 188 | return false; |
| 189 | } |
| 190 | class_info_.reset(new ScopedClassInfo(jvmtienv_, declaring_class_)); |
| 191 | return class_info_->Init() && |
| 192 | (jvmtienv_->GetMethodName(method_, &name_, &signature_, &generic_) == JVMTI_ERROR_NONE); |
| 193 | } |
| 194 | |
| 195 | const ScopedClassInfo& GetDeclaringClassInfo() const { |
| 196 | return *class_info_; |
| 197 | } |
| 198 | |
| 199 | jclass GetDeclaringClass() const { |
| 200 | return declaring_class_; |
| 201 | } |
| 202 | |
| 203 | const char* GetName() const { |
| 204 | return name_; |
| 205 | } |
| 206 | |
| 207 | const char* GetSignature() const { |
| 208 | return signature_; |
| 209 | } |
| 210 | |
| 211 | const char* GetGeneric() const { |
| 212 | return generic_; |
| 213 | } |
| 214 | |
| 215 | private: |
| 216 | jvmtiEnv* jvmtienv_; |
| 217 | JNIEnv* env_; |
| 218 | jmethodID method_; |
| 219 | jclass declaring_class_; |
| 220 | std::unique_ptr<ScopedClassInfo> class_info_; |
| 221 | char* name_; |
| 222 | char* signature_; |
| 223 | char* generic_; |
| 224 | |
| 225 | friend std::ostream& operator<<(std::ostream &os, ScopedMethodInfo const& m); |
| 226 | }; |
| 227 | |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 228 | class ScopedFieldInfo { |
| 229 | public: |
| 230 | ScopedFieldInfo(jvmtiEnv* jvmtienv, jclass field_klass, jfieldID field) |
| 231 | : jvmtienv_(jvmtienv), |
| 232 | declaring_class_(field_klass), |
| 233 | field_(field), |
| 234 | class_info_(nullptr), |
| 235 | name_(nullptr), |
| 236 | type_(nullptr), |
| 237 | generic_(nullptr) {} |
| 238 | |
| 239 | ~ScopedFieldInfo() { |
| 240 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 241 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(type_)); |
| 242 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
| 243 | } |
| 244 | |
| 245 | bool Init() { |
| 246 | class_info_.reset(new ScopedClassInfo(jvmtienv_, declaring_class_)); |
| 247 | return class_info_->Init() && |
| 248 | (jvmtienv_->GetFieldName( |
| 249 | declaring_class_, field_, &name_, &type_, &generic_) == JVMTI_ERROR_NONE); |
| 250 | } |
| 251 | |
| 252 | const ScopedClassInfo& GetDeclaringClassInfo() const { |
| 253 | return *class_info_; |
| 254 | } |
| 255 | |
| 256 | jclass GetDeclaringClass() const { |
| 257 | return declaring_class_; |
| 258 | } |
| 259 | |
| 260 | const char* GetName() const { |
| 261 | return name_; |
| 262 | } |
| 263 | |
| 264 | const char* GetType() const { |
| 265 | return type_; |
| 266 | } |
| 267 | |
| 268 | const char* GetGeneric() const { |
| 269 | return generic_; |
| 270 | } |
| 271 | |
| 272 | private: |
| 273 | jvmtiEnv* jvmtienv_; |
| 274 | jclass declaring_class_; |
| 275 | jfieldID field_; |
| 276 | std::unique_ptr<ScopedClassInfo> class_info_; |
| 277 | char* name_; |
| 278 | char* type_; |
| 279 | char* generic_; |
| 280 | |
| 281 | friend std::ostream& operator<<(std::ostream &os, ScopedFieldInfo const& m); |
| 282 | }; |
| 283 | |
| 284 | std::ostream& operator<<(std::ostream &os, const ScopedFieldInfo* m) { |
| 285 | return os << *m; |
| 286 | } |
| 287 | |
| 288 | std::ostream& operator<<(std::ostream &os, ScopedFieldInfo const& m) { |
| 289 | return os << m.GetDeclaringClassInfo().GetName() << "->" << m.GetName() |
| 290 | << ":" << m.GetType(); |
| 291 | } |
| 292 | |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 293 | std::ostream& operator<<(std::ostream &os, const ScopedMethodInfo* m) { |
| 294 | return os << *m; |
| 295 | } |
| 296 | |
| 297 | std::ostream& operator<<(std::ostream &os, ScopedMethodInfo const& m) { |
| 298 | return os << m.GetDeclaringClassInfo().GetName() << "->" << m.GetName() << m.GetSignature(); |
| 299 | } |
| 300 | |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 301 | static void doJvmtiMethodBind(jvmtiEnv* jvmtienv, |
| 302 | JNIEnv* env, |
| 303 | jthread thread, |
| 304 | jmethodID m, |
| 305 | void* address, |
| 306 | /*out*/void** out_address) { |
| 307 | *out_address = address; |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 308 | ScopedThreadInfo thread_info(jvmtienv, env, thread); |
| 309 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 310 | if (!method_info.Init()) { |
| 311 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 312 | return; |
| 313 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 314 | LOG(INFO) << "Loading native method \"" << method_info << "\". Thread is " |
| 315 | << thread_info.GetName(); |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 316 | } |
| 317 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 318 | static std::string GetName(jvmtiEnv* jvmtienv, JNIEnv* jnienv, jobject obj) { |
| 319 | jclass klass = jnienv->GetObjectClass(obj); |
| 320 | char *cname, *cgen; |
| 321 | if (jvmtienv->GetClassSignature(klass, &cname, &cgen) != JVMTI_ERROR_NONE) { |
| 322 | LOG(ERROR) << "Unable to get class name!"; |
| 323 | jnienv->DeleteLocalRef(klass); |
| 324 | return "<UNKNOWN>"; |
| 325 | } |
| 326 | std::string name(cname); |
| 327 | if (name == "Ljava/lang/String;") { |
| 328 | jstring str = reinterpret_cast<jstring>(obj); |
| 329 | const char* val = jnienv->GetStringUTFChars(str, nullptr); |
| 330 | if (val == nullptr) { |
| 331 | name += " (unable to get value)"; |
| 332 | } else { |
| 333 | std::ostringstream oss; |
| 334 | oss << name << " (value: \"" << val << "\")"; |
| 335 | name = oss.str(); |
| 336 | jnienv->ReleaseStringUTFChars(str, val); |
| 337 | } |
| 338 | } |
| 339 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(cname)); |
| 340 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(cgen)); |
| 341 | jnienv->DeleteLocalRef(klass); |
| 342 | return name; |
| 343 | } |
| 344 | |
| 345 | static std::string GetValOf(jvmtiEnv* env, JNIEnv* jnienv, std::string type, jvalue val) { |
| 346 | std::ostringstream oss; |
| 347 | switch (type[0]) { |
| 348 | case '[': |
| 349 | case 'L': |
| 350 | return val.l != nullptr ? GetName(env, jnienv, val.l) : "null"; |
| 351 | case 'Z': |
| 352 | return val.z == JNI_TRUE ? "true" : "false"; |
| 353 | case 'B': |
| 354 | oss << val.b; |
| 355 | return oss.str(); |
| 356 | case 'C': |
| 357 | oss << val.c; |
| 358 | return oss.str(); |
| 359 | case 'S': |
| 360 | oss << val.s; |
| 361 | return oss.str(); |
| 362 | case 'I': |
| 363 | oss << val.i; |
| 364 | return oss.str(); |
| 365 | case 'J': |
| 366 | oss << val.j; |
| 367 | return oss.str(); |
| 368 | case 'F': |
| 369 | oss << val.f; |
| 370 | return oss.str(); |
| 371 | case 'D': |
| 372 | oss << val.d; |
| 373 | return oss.str(); |
| 374 | case 'V': |
| 375 | return "<void>"; |
| 376 | default: |
| 377 | return "<ERROR Found type " + type + ">"; |
| 378 | } |
| 379 | } |
| 380 | |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 381 | void JNICALL FieldAccessHook(jvmtiEnv* jvmtienv, |
| 382 | JNIEnv* env, |
| 383 | jthread thread, |
| 384 | jmethodID m, |
| 385 | jlocation location, |
| 386 | jclass field_klass, |
| 387 | jobject object, |
| 388 | jfieldID field) { |
| 389 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 390 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 391 | ScopedFieldInfo field_info(jvmtienv, field_klass, field); |
| 392 | jclass oklass = (object != nullptr) ? env->GetObjectClass(object) : nullptr; |
| 393 | ScopedClassInfo obj_class_info(jvmtienv, oklass); |
| 394 | if (!method_info.Init() || !field_info.Init() || !obj_class_info.Init()) { |
| 395 | LOG(ERROR) << "Unable to get callback info!"; |
| 396 | return; |
| 397 | } |
| 398 | LOG(INFO) << "ACCESS field \"" << field_info << "\" on object of " |
| 399 | << "type \"" << obj_class_info.GetName() << "\" in method \"" << method_info |
| 400 | << "\" at location 0x" << std::hex << location << ". Thread is \"" |
| 401 | << info.GetName() << "\"."; |
| 402 | env->DeleteLocalRef(oklass); |
| 403 | } |
| 404 | |
| 405 | static std::string PrintJValue(jvmtiEnv* jvmtienv, JNIEnv* env, char type, jvalue new_value) { |
| 406 | std::ostringstream oss; |
| 407 | switch (type) { |
| 408 | case 'L': { |
| 409 | jobject nv = new_value.l; |
| 410 | if (nv == nullptr) { |
| 411 | oss << "\"null\""; |
| 412 | } else { |
| 413 | jclass nv_klass = env->GetObjectClass(nv); |
| 414 | ScopedClassInfo nv_class_info(jvmtienv, nv_klass); |
| 415 | if (!nv_class_info.Init()) { |
| 416 | oss << "with unknown type"; |
| 417 | } else { |
| 418 | oss << "of type \"" << nv_class_info.GetName() << "\""; |
| 419 | } |
| 420 | env->DeleteLocalRef(nv_klass); |
| 421 | } |
| 422 | break; |
| 423 | } |
| 424 | case 'Z': { |
| 425 | if (new_value.z) { |
| 426 | oss << "true"; |
| 427 | } else { |
| 428 | oss << "false"; |
| 429 | } |
| 430 | break; |
| 431 | } |
| 432 | #define SEND_VALUE(chr, sym, type) \ |
| 433 | case chr: { \ |
| 434 | oss << static_cast<type>(new_value.sym); \ |
| 435 | break; \ |
| 436 | } |
| 437 | SEND_VALUE('B', b, int8_t); |
| 438 | SEND_VALUE('C', c, uint16_t); |
| 439 | SEND_VALUE('S', s, int16_t); |
| 440 | SEND_VALUE('I', i, int32_t); |
| 441 | SEND_VALUE('J', j, int64_t); |
| 442 | SEND_VALUE('F', f, float); |
| 443 | SEND_VALUE('D', d, double); |
| 444 | #undef SEND_VALUE |
| 445 | } |
| 446 | return oss.str(); |
| 447 | } |
| 448 | |
| 449 | void JNICALL FieldModificationHook(jvmtiEnv* jvmtienv, |
| 450 | JNIEnv* env, |
| 451 | jthread thread, |
| 452 | jmethodID m, |
| 453 | jlocation location, |
| 454 | jclass field_klass, |
| 455 | jobject object, |
| 456 | jfieldID field, |
| 457 | char type, |
| 458 | jvalue new_value) { |
| 459 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 460 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 461 | ScopedFieldInfo field_info(jvmtienv, field_klass, field); |
| 462 | jclass oklass = (object != nullptr) ? env->GetObjectClass(object) : nullptr; |
| 463 | ScopedClassInfo obj_class_info(jvmtienv, oklass); |
| 464 | if (!method_info.Init() || !field_info.Init() || !obj_class_info.Init()) { |
| 465 | LOG(ERROR) << "Unable to get callback info!"; |
| 466 | return; |
| 467 | } |
| 468 | LOG(INFO) << "MODIFY field \"" << field_info << "\" on object of " |
| 469 | << "type \"" << obj_class_info.GetName() << "\" in method \"" << method_info |
| 470 | << "\" at location 0x" << std::hex << location << std::dec << ". New value is " |
| 471 | << PrintJValue(jvmtienv, env, type, new_value) << ". Thread is \"" |
| 472 | << info.GetName() << "\"."; |
| 473 | env->DeleteLocalRef(oklass); |
| 474 | } |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 475 | void JNICALL MethodExitHook(jvmtiEnv* jvmtienv, |
| 476 | JNIEnv* env, |
| 477 | jthread thread, |
| 478 | jmethodID m, |
| 479 | jboolean was_popped_by_exception, |
| 480 | jvalue val) { |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 481 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 482 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 483 | if (!method_info.Init()) { |
| 484 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 485 | return; |
| 486 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 487 | std::string type(method_info.GetSignature()); |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 488 | type = type.substr(type.find(")") + 1); |
| 489 | std::string out_val(was_popped_by_exception ? "" : GetValOf(jvmtienv, env, type, val)); |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 490 | LOG(INFO) << "Leaving method \"" << method_info << "\". Thread is \"" << info.GetName() << "\"." |
| 491 | << std::endl |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 492 | << " Cause: " << (was_popped_by_exception ? "exception" : "return ") |
| 493 | << out_val << "."; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | void JNICALL MethodEntryHook(jvmtiEnv* jvmtienv, |
| 497 | JNIEnv* env, |
| 498 | jthread thread, |
| 499 | jmethodID m) { |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 500 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 501 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 502 | if (!method_info.Init()) { |
| 503 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 504 | return; |
| 505 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 506 | LOG(INFO) << "Entering method \"" << method_info << "\". Thread is \"" << info.GetName() << "\""; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 509 | void JNICALL ClassPrepareHook(jvmtiEnv* jvmtienv, |
| 510 | JNIEnv* env, |
| 511 | jthread thread, |
| 512 | jclass klass) { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 513 | StressData* data = nullptr; |
| 514 | CHECK_EQ(jvmtienv->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 515 | JVMTI_ERROR_NONE); |
| 516 | if (data->field_stress) { |
| 517 | jint nfields; |
| 518 | jfieldID* fields; |
| 519 | if (jvmtienv->GetClassFields(klass, &nfields, &fields) != JVMTI_ERROR_NONE) { |
| 520 | LOG(ERROR) << "Unable to get a classes fields!"; |
| 521 | return; |
| 522 | } |
| 523 | for (jint i = 0; i < nfields; i++) { |
| 524 | jfieldID f = fields[i]; |
| 525 | // Ignore errors |
| 526 | jvmtienv->SetFieldAccessWatch(klass, f); |
| 527 | jvmtienv->SetFieldModificationWatch(klass, f); |
| 528 | } |
| 529 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(fields)); |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 530 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 531 | if (data->trace_stress) { |
| 532 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 533 | ScopedClassInfo class_info(jvmtienv, klass); |
| 534 | if (!class_info.Init()) { |
| 535 | LOG(ERROR) << "Unable to get class info!"; |
| 536 | return; |
| 537 | } |
| 538 | LOG(INFO) << "Prepared class \"" << class_info.GetName() << "\". Thread is \"" |
| 539 | << info.GetName() << "\""; |
| 540 | } |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 541 | } |
| 542 | |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 543 | // The hook we are using. |
| 544 | void JNICALL ClassFileLoadHookSecretNoOp(jvmtiEnv* jvmti, |
| 545 | JNIEnv* jni_env ATTRIBUTE_UNUSED, |
| 546 | jclass class_being_redefined ATTRIBUTE_UNUSED, |
| 547 | jobject loader ATTRIBUTE_UNUSED, |
| 548 | const char* name, |
| 549 | jobject protection_domain ATTRIBUTE_UNUSED, |
| 550 | jint class_data_len, |
| 551 | const unsigned char* class_data, |
| 552 | jint* new_class_data_len, |
| 553 | unsigned char** new_class_data) { |
| 554 | std::vector<unsigned char> out; |
| 555 | std::string name_str(name); |
| 556 | // Make the jvmti semi-descriptor into the java style descriptor (though with $ for inner |
| 557 | // classes). |
| 558 | std::replace(name_str.begin(), name_str.end(), '/', '.'); |
| 559 | StressData* data = nullptr; |
| 560 | CHECK_EQ(jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 561 | JVMTI_ERROR_NONE); |
| 562 | if (!data->vm_class_loader_initialized) { |
| 563 | LOG(WARNING) << "Ignoring load of class " << name << " because VMClassLoader is not yet " |
| 564 | << "initialized. Transforming this class could cause spurious test failures."; |
| 565 | return; |
| 566 | } else if (DoExtractClassFromData(data, name_str, class_data_len, class_data, /*out*/ &out)) { |
| 567 | LOG(INFO) << "Extracted class: " << name; |
| 568 | unsigned char* new_data; |
| 569 | CHECK_EQ(JVMTI_ERROR_NONE, jvmti->Allocate(out.size(), &new_data)); |
| 570 | memcpy(new_data, out.data(), out.size()); |
| 571 | *new_class_data_len = static_cast<jint>(out.size()); |
| 572 | *new_class_data = new_data; |
| 573 | } else { |
| 574 | std::cerr << "Unable to extract class " << name_str << std::endl; |
| 575 | *new_class_data_len = 0; |
| 576 | *new_class_data = nullptr; |
| 577 | } |
| 578 | } |
| 579 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 580 | static std::string AdvanceOption(const std::string& ops) { |
| 581 | return ops.substr(ops.find(',') + 1); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 582 | } |
| 583 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 584 | static bool HasNextOption(const std::string& ops) { |
| 585 | return ops.find(',') != std::string::npos; |
| 586 | } |
| 587 | |
| 588 | static std::string GetOption(const std::string& in) { |
| 589 | return in.substr(0, in.find(',')); |
| 590 | } |
| 591 | |
| 592 | // Options are |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 593 | // jvmti-stress,[redefine,${DEXTER_BINARY},${TEMP_FILE_1},${TEMP_FILE_2},][trace,][field] |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 594 | static void ReadOptions(StressData* data, char* options) { |
| 595 | std::string ops(options); |
| 596 | CHECK_EQ(GetOption(ops), "jvmti-stress") << "Options should start with jvmti-stress"; |
| 597 | do { |
| 598 | ops = AdvanceOption(ops); |
| 599 | std::string cur = GetOption(ops); |
| 600 | if (cur == "trace") { |
| 601 | data->trace_stress = true; |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 602 | } else if (cur == "field") { |
| 603 | data->field_stress = true; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 604 | } else if (cur == "redefine") { |
| 605 | data->redefine_stress = true; |
| 606 | ops = AdvanceOption(ops); |
| 607 | data->dexter_cmd = GetOption(ops); |
| 608 | ops = AdvanceOption(ops); |
| 609 | data->in_temp_dex = GetOption(ops); |
| 610 | ops = AdvanceOption(ops); |
| 611 | data->out_temp_dex = GetOption(ops); |
| 612 | } else { |
| 613 | LOG(FATAL) << "Unknown option: " << GetOption(ops); |
| 614 | } |
| 615 | } while (HasNextOption(ops)); |
| 616 | } |
| 617 | |
| 618 | // Do final setup during the VMInit callback. By this time most things are all setup. |
| 619 | static void JNICALL PerformFinalSetupVMInit(jvmtiEnv *jvmti_env, |
| 620 | JNIEnv* jni_env, |
| 621 | jthread thread ATTRIBUTE_UNUSED) { |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 622 | // Load the VMClassLoader class. We will get a ClassNotFound exception because we don't have |
| 623 | // visibility but the class will be loaded behind the scenes. |
| 624 | LOG(INFO) << "manual load & initialization of class java/lang/VMClassLoader!"; |
| 625 | jclass klass = jni_env->FindClass("java/lang/VMClassLoader"); |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 626 | StressData* data = nullptr; |
| 627 | CHECK_EQ(jvmti_env->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 628 | JVMTI_ERROR_NONE); |
| 629 | // We need to make sure that VMClassLoader is initialized before we start redefining anything |
| 630 | // since it can give (non-fatal) error messages if it's initialized after we've redefined BCP |
| 631 | // classes. These error messages are expected and no problem but they will mess up our testing |
| 632 | // infrastructure. |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 633 | if (klass == nullptr) { |
Alex Light | 42151c0 | 2017-04-20 15:54:25 -0700 | [diff] [blame] | 634 | // Probably on RI. Clear the exception so we can continue but don't mark vmclassloader as |
| 635 | // initialized. |
| 636 | LOG(WARNING) << "Unable to find VMClassLoader class!"; |
| 637 | jni_env->ExceptionClear(); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 638 | } else { |
| 639 | // GetMethodID is spec'd to cause the class to be initialized. |
| 640 | jni_env->GetMethodID(klass, "hashCode", "()I"); |
| 641 | jni_env->DeleteLocalRef(klass); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 642 | data->vm_class_loader_initialized = true; |
| 643 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 644 | } |
| 645 | |
| 646 | static bool WatchAllFields(JavaVM* vm, jvmtiEnv* jvmti) { |
| 647 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 648 | JVMTI_EVENT_CLASS_PREPARE, |
| 649 | nullptr) != JVMTI_ERROR_NONE) { |
| 650 | LOG(ERROR) << "Couldn't set prepare event!"; |
| 651 | return false; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 652 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 653 | // TODO We really shouldn't need to do this step here. |
| 654 | jint nklass; |
| 655 | jclass* klasses; |
| 656 | if (jvmti->GetLoadedClasses(&nklass, &klasses) != JVMTI_ERROR_NONE) { |
| 657 | LOG(WARNING) << "Couldn't get loaded classes! Ignoring."; |
| 658 | return true; |
| 659 | } |
| 660 | JNIEnv* jni = nullptr; |
| 661 | if (vm->GetEnv(reinterpret_cast<void**>(&jni), JNI_VERSION_1_6)) { |
| 662 | LOG(ERROR) << "Unable to get jni env. Ignoring and potentially leaking jobjects."; |
| 663 | return false; |
| 664 | } |
| 665 | for (jint i = 0; i < nklass; i++) { |
| 666 | jclass k = klasses[i]; |
| 667 | ScopedClassInfo sci(jvmti, k); |
| 668 | if (sci.Init()) { |
| 669 | LOG(INFO) << "NOTE: class " << sci.GetName() << " already loaded."; |
| 670 | } |
| 671 | jint nfields; |
| 672 | jfieldID* fields; |
| 673 | jvmtiError err = jvmti->GetClassFields(k, &nfields, &fields); |
| 674 | if (err == JVMTI_ERROR_NONE) { |
| 675 | for (jint j = 0; j < nfields; j++) { |
| 676 | jfieldID f = fields[j]; |
| 677 | if (jvmti->SetFieldModificationWatch(k, f) != JVMTI_ERROR_NONE || |
| 678 | jvmti->SetFieldAccessWatch(k, f) != JVMTI_ERROR_NONE) { |
| 679 | LOG(ERROR) << "Unable to set watches on a field."; |
| 680 | return false; |
| 681 | } |
| 682 | } |
| 683 | } else if (err != JVMTI_ERROR_CLASS_NOT_PREPARED) { |
| 684 | LOG(ERROR) << "Unexpected error getting class fields!"; |
| 685 | return false; |
| 686 | } |
| 687 | jvmti->Deallocate(reinterpret_cast<unsigned char*>(fields)); |
| 688 | jni->DeleteLocalRef(k); |
| 689 | } |
| 690 | jvmti->Deallocate(reinterpret_cast<unsigned char*>(klasses)); |
| 691 | return true; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | extern "C" JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM* vm, |
| 695 | char* options, |
| 696 | void* reserved ATTRIBUTE_UNUSED) { |
| 697 | jvmtiEnv* jvmti = nullptr; |
| 698 | if (vm->GetEnv(reinterpret_cast<void**>(&jvmti), JVMTI_VERSION_1_0)) { |
| 699 | LOG(ERROR) << "Unable to get jvmti env."; |
| 700 | return 1; |
| 701 | } |
| 702 | StressData* data = nullptr; |
| 703 | if (JVMTI_ERROR_NONE != jvmti->Allocate(sizeof(StressData), |
| 704 | reinterpret_cast<unsigned char**>(&data))) { |
| 705 | LOG(ERROR) << "Unable to allocate data for stress test."; |
| 706 | return 1; |
| 707 | } |
| 708 | memset(data, 0, sizeof(StressData)); |
| 709 | // Read the options into the static variables that hold them. |
| 710 | ReadOptions(data, options); |
| 711 | // Save the data |
| 712 | if (JVMTI_ERROR_NONE != jvmti->SetEnvironmentLocalStorage(data)) { |
| 713 | LOG(ERROR) << "Unable to save stress test data."; |
| 714 | return 1; |
| 715 | } |
| 716 | |
| 717 | // Just get all capabilities. |
| 718 | jvmtiCapabilities caps; |
| 719 | jvmti->GetPotentialCapabilities(&caps); |
| 720 | jvmti->AddCapabilities(&caps); |
| 721 | |
| 722 | // Set callbacks. |
| 723 | jvmtiEventCallbacks cb; |
| 724 | memset(&cb, 0, sizeof(cb)); |
| 725 | cb.ClassFileLoadHook = ClassFileLoadHookSecretNoOp; |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 726 | cb.NativeMethodBind = doJvmtiMethodBind; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 727 | cb.VMInit = PerformFinalSetupVMInit; |
| 728 | cb.MethodEntry = MethodEntryHook; |
| 729 | cb.MethodExit = MethodExitHook; |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 730 | cb.FieldAccess = FieldAccessHook; |
| 731 | cb.FieldModification = FieldModificationHook; |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 732 | cb.ClassPrepare = ClassPrepareHook; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 733 | if (jvmti->SetEventCallbacks(&cb, sizeof(cb)) != JVMTI_ERROR_NONE) { |
| 734 | LOG(ERROR) << "Unable to set class file load hook cb!"; |
| 735 | return 1; |
| 736 | } |
| 737 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 738 | JVMTI_EVENT_VM_INIT, |
| 739 | nullptr) != JVMTI_ERROR_NONE) { |
| 740 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_VM_INIT event!"; |
| 741 | return 1; |
| 742 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 743 | if (data->redefine_stress) { |
| 744 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 745 | JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, |
| 746 | nullptr) != JVMTI_ERROR_NONE) { |
| 747 | LOG(ERROR) << "Unable to enable CLASS_FILE_LOAD_HOOK event!"; |
| 748 | return 1; |
| 749 | } |
| 750 | } |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 751 | if (data->trace_stress) { |
| 752 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 753 | JVMTI_EVENT_CLASS_PREPARE, |
| 754 | nullptr) != JVMTI_ERROR_NONE) { |
| 755 | LOG(ERROR) << "Unable to enable CLASS_PREPARE event!"; |
| 756 | return 1; |
| 757 | } |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 758 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 759 | JVMTI_EVENT_NATIVE_METHOD_BIND, |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 760 | nullptr) != JVMTI_ERROR_NONE) { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame^] | 761 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_NATIVE_METHOD_BIND event!"; |
| 762 | return 1; |
| 763 | } |
| 764 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 765 | JVMTI_EVENT_METHOD_ENTRY, |
| 766 | nullptr) != JVMTI_ERROR_NONE) { |
| 767 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_METHOD_ENTRY event!"; |
| 768 | return 1; |
| 769 | } |
| 770 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 771 | JVMTI_EVENT_METHOD_EXIT, |
| 772 | nullptr) != JVMTI_ERROR_NONE) { |
| 773 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_METHOD_EXIT event!"; |
| 774 | return 1; |
| 775 | } |
| 776 | } |
| 777 | if (data->field_stress) { |
| 778 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 779 | JVMTI_EVENT_FIELD_MODIFICATION, |
| 780 | nullptr) != JVMTI_ERROR_NONE) { |
| 781 | LOG(ERROR) << "Unable to enable FIELD_MODIFICATION event!"; |
| 782 | return 1; |
| 783 | } |
| 784 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 785 | JVMTI_EVENT_FIELD_ACCESS, |
| 786 | nullptr) != JVMTI_ERROR_NONE) { |
| 787 | LOG(ERROR) << "Unable to enable FIELD_ACCESS event!"; |
| 788 | return 1; |
| 789 | } |
| 790 | if (!WatchAllFields(vm, jvmti)) { |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 791 | return 1; |
| 792 | } |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 793 | } |
| 794 | return 0; |
| 795 | } |
| 796 | |
| 797 | } // namespace art |