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 | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 42 | }; |
| 43 | |
| 44 | static void WriteToFile(const std::string& fname, jint data_len, const unsigned char* data) { |
| 45 | std::ofstream file(fname, std::ios::binary | std::ios::out | std::ios::trunc); |
| 46 | file.write(reinterpret_cast<const char*>(data), data_len); |
| 47 | file.flush(); |
| 48 | } |
| 49 | |
| 50 | static bool ReadIntoBuffer(const std::string& fname, /*out*/std::vector<unsigned char>* data) { |
| 51 | std::ifstream file(fname, std::ios::binary | std::ios::in); |
| 52 | file.seekg(0, std::ios::end); |
| 53 | size_t len = file.tellg(); |
| 54 | data->resize(len); |
| 55 | file.seekg(0); |
| 56 | file.read(reinterpret_cast<char*>(data->data()), len); |
| 57 | return len != 0; |
| 58 | } |
| 59 | |
| 60 | // TODO rewrite later. |
| 61 | static bool DoExtractClassFromData(StressData* data, |
| 62 | const std::string& class_name, |
| 63 | jint in_len, |
| 64 | const unsigned char* in_data, |
| 65 | /*out*/std::vector<unsigned char>* dex) { |
| 66 | // Write the dex file into a temporary file. |
| 67 | WriteToFile(data->in_temp_dex, in_len, in_data); |
| 68 | // Clear out file so even if something suppresses the exit value we will still detect dexter |
| 69 | // failure. |
| 70 | WriteToFile(data->out_temp_dex, 0, nullptr); |
| 71 | // Have dexter do the extraction. |
| 72 | std::vector<std::string> args; |
| 73 | args.push_back(data->dexter_cmd); |
| 74 | if (kDoFullRewrite) { |
| 75 | args.push_back("-x"); |
| 76 | args.push_back("full_rewrite"); |
| 77 | } |
| 78 | args.push_back("-e"); |
| 79 | args.push_back(class_name); |
| 80 | args.push_back("-o"); |
| 81 | args.push_back(data->out_temp_dex); |
| 82 | args.push_back(data->in_temp_dex); |
| 83 | std::string error; |
| 84 | if (ExecAndReturnCode(args, &error) != 0) { |
| 85 | LOG(ERROR) << "unable to execute dexter: " << error; |
| 86 | return false; |
| 87 | } |
| 88 | return ReadIntoBuffer(data->out_temp_dex, dex); |
| 89 | } |
| 90 | |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame^] | 91 | class ScopedThreadInfo { |
| 92 | public: |
| 93 | ScopedThreadInfo(jvmtiEnv* jvmtienv, JNIEnv* env, jthread thread) |
| 94 | : jvmtienv_(jvmtienv), env_(env), free_name_(false) { |
| 95 | memset(&info_, 0, sizeof(info_)); |
| 96 | if (thread == nullptr) { |
| 97 | info_.name = const_cast<char*>("<NULLPTR>"); |
| 98 | } else if (jvmtienv->GetThreadInfo(thread, &info_) != JVMTI_ERROR_NONE) { |
| 99 | info_.name = const_cast<char*>("<UNKNOWN THREAD>"); |
| 100 | } else { |
| 101 | free_name_ = true; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | ~ScopedThreadInfo() { |
| 106 | if (free_name_) { |
| 107 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(info_.name)); |
| 108 | } |
| 109 | env_->DeleteLocalRef(info_.thread_group); |
| 110 | env_->DeleteLocalRef(info_.context_class_loader); |
| 111 | } |
| 112 | |
| 113 | const char* GetName() const { |
| 114 | return info_.name; |
| 115 | } |
| 116 | |
| 117 | private: |
| 118 | jvmtiEnv* jvmtienv_; |
| 119 | JNIEnv* env_; |
| 120 | bool free_name_; |
| 121 | jvmtiThreadInfo info_; |
| 122 | }; |
| 123 | |
| 124 | class ScopedClassInfo { |
| 125 | public: |
| 126 | ScopedClassInfo(jvmtiEnv* jvmtienv, jclass c) |
| 127 | : jvmtienv_(jvmtienv), |
| 128 | class_(c), |
| 129 | name_(nullptr), |
| 130 | generic_(nullptr) {} |
| 131 | |
| 132 | ~ScopedClassInfo() { |
| 133 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 134 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
| 135 | } |
| 136 | |
| 137 | bool Init() { |
| 138 | return jvmtienv_->GetClassSignature(class_, &name_, &generic_) == JVMTI_ERROR_NONE; |
| 139 | } |
| 140 | |
| 141 | jclass GetClass() const { |
| 142 | return class_; |
| 143 | } |
| 144 | const char* GetName() const { |
| 145 | return name_; |
| 146 | } |
| 147 | const char* GetGeneric() const { |
| 148 | return generic_; |
| 149 | } |
| 150 | |
| 151 | private: |
| 152 | jvmtiEnv* jvmtienv_; |
| 153 | jclass class_; |
| 154 | char* name_; |
| 155 | char* generic_; |
| 156 | }; |
| 157 | |
| 158 | class ScopedMethodInfo { |
| 159 | public: |
| 160 | ScopedMethodInfo(jvmtiEnv* jvmtienv, JNIEnv* env, jmethodID m) |
| 161 | : jvmtienv_(jvmtienv), |
| 162 | env_(env), |
| 163 | method_(m), |
| 164 | declaring_class_(nullptr), |
| 165 | class_info_(nullptr), |
| 166 | name_(nullptr), |
| 167 | signature_(nullptr), |
| 168 | generic_(nullptr) {} |
| 169 | |
| 170 | ~ScopedMethodInfo() { |
| 171 | env_->DeleteLocalRef(declaring_class_); |
| 172 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 173 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(signature_)); |
| 174 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
| 175 | } |
| 176 | |
| 177 | bool Init() { |
| 178 | if (jvmtienv_->GetMethodDeclaringClass(method_, &declaring_class_) != JVMTI_ERROR_NONE) { |
| 179 | return false; |
| 180 | } |
| 181 | class_info_.reset(new ScopedClassInfo(jvmtienv_, declaring_class_)); |
| 182 | return class_info_->Init() && |
| 183 | (jvmtienv_->GetMethodName(method_, &name_, &signature_, &generic_) == JVMTI_ERROR_NONE); |
| 184 | } |
| 185 | |
| 186 | const ScopedClassInfo& GetDeclaringClassInfo() const { |
| 187 | return *class_info_; |
| 188 | } |
| 189 | |
| 190 | jclass GetDeclaringClass() const { |
| 191 | return declaring_class_; |
| 192 | } |
| 193 | |
| 194 | const char* GetName() const { |
| 195 | return name_; |
| 196 | } |
| 197 | |
| 198 | const char* GetSignature() const { |
| 199 | return signature_; |
| 200 | } |
| 201 | |
| 202 | const char* GetGeneric() const { |
| 203 | return generic_; |
| 204 | } |
| 205 | |
| 206 | private: |
| 207 | jvmtiEnv* jvmtienv_; |
| 208 | JNIEnv* env_; |
| 209 | jmethodID method_; |
| 210 | jclass declaring_class_; |
| 211 | std::unique_ptr<ScopedClassInfo> class_info_; |
| 212 | char* name_; |
| 213 | char* signature_; |
| 214 | char* generic_; |
| 215 | |
| 216 | friend std::ostream& operator<<(std::ostream &os, ScopedMethodInfo const& m); |
| 217 | }; |
| 218 | |
| 219 | std::ostream& operator<<(std::ostream &os, const ScopedMethodInfo* m) { |
| 220 | return os << *m; |
| 221 | } |
| 222 | |
| 223 | std::ostream& operator<<(std::ostream &os, ScopedMethodInfo const& m) { |
| 224 | return os << m.GetDeclaringClassInfo().GetName() << "->" << m.GetName() << m.GetSignature(); |
| 225 | } |
| 226 | |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 227 | static void doJvmtiMethodBind(jvmtiEnv* jvmtienv, |
| 228 | JNIEnv* env, |
| 229 | jthread thread, |
| 230 | jmethodID m, |
| 231 | void* address, |
| 232 | /*out*/void** out_address) { |
| 233 | *out_address = address; |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame^] | 234 | ScopedThreadInfo thread_info(jvmtienv, env, thread); |
| 235 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 236 | if (!method_info.Init()) { |
| 237 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 238 | return; |
| 239 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame^] | 240 | LOG(INFO) << "Loading native method \"" << method_info << "\". Thread is " |
| 241 | << thread_info.GetName(); |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 242 | } |
| 243 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 244 | static std::string GetName(jvmtiEnv* jvmtienv, JNIEnv* jnienv, jobject obj) { |
| 245 | jclass klass = jnienv->GetObjectClass(obj); |
| 246 | char *cname, *cgen; |
| 247 | if (jvmtienv->GetClassSignature(klass, &cname, &cgen) != JVMTI_ERROR_NONE) { |
| 248 | LOG(ERROR) << "Unable to get class name!"; |
| 249 | jnienv->DeleteLocalRef(klass); |
| 250 | return "<UNKNOWN>"; |
| 251 | } |
| 252 | std::string name(cname); |
| 253 | if (name == "Ljava/lang/String;") { |
| 254 | jstring str = reinterpret_cast<jstring>(obj); |
| 255 | const char* val = jnienv->GetStringUTFChars(str, nullptr); |
| 256 | if (val == nullptr) { |
| 257 | name += " (unable to get value)"; |
| 258 | } else { |
| 259 | std::ostringstream oss; |
| 260 | oss << name << " (value: \"" << val << "\")"; |
| 261 | name = oss.str(); |
| 262 | jnienv->ReleaseStringUTFChars(str, val); |
| 263 | } |
| 264 | } |
| 265 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(cname)); |
| 266 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(cgen)); |
| 267 | jnienv->DeleteLocalRef(klass); |
| 268 | return name; |
| 269 | } |
| 270 | |
| 271 | static std::string GetValOf(jvmtiEnv* env, JNIEnv* jnienv, std::string type, jvalue val) { |
| 272 | std::ostringstream oss; |
| 273 | switch (type[0]) { |
| 274 | case '[': |
| 275 | case 'L': |
| 276 | return val.l != nullptr ? GetName(env, jnienv, val.l) : "null"; |
| 277 | case 'Z': |
| 278 | return val.z == JNI_TRUE ? "true" : "false"; |
| 279 | case 'B': |
| 280 | oss << val.b; |
| 281 | return oss.str(); |
| 282 | case 'C': |
| 283 | oss << val.c; |
| 284 | return oss.str(); |
| 285 | case 'S': |
| 286 | oss << val.s; |
| 287 | return oss.str(); |
| 288 | case 'I': |
| 289 | oss << val.i; |
| 290 | return oss.str(); |
| 291 | case 'J': |
| 292 | oss << val.j; |
| 293 | return oss.str(); |
| 294 | case 'F': |
| 295 | oss << val.f; |
| 296 | return oss.str(); |
| 297 | case 'D': |
| 298 | oss << val.d; |
| 299 | return oss.str(); |
| 300 | case 'V': |
| 301 | return "<void>"; |
| 302 | default: |
| 303 | return "<ERROR Found type " + type + ">"; |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | void JNICALL MethodExitHook(jvmtiEnv* jvmtienv, |
| 308 | JNIEnv* env, |
| 309 | jthread thread, |
| 310 | jmethodID m, |
| 311 | jboolean was_popped_by_exception, |
| 312 | jvalue val) { |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame^] | 313 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 314 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 315 | if (!method_info.Init()) { |
| 316 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 317 | return; |
| 318 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame^] | 319 | std::string type(method_info.GetSignature()); |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 320 | type = type.substr(type.find(")") + 1); |
| 321 | 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^] | 322 | LOG(INFO) << "Leaving method \"" << method_info << "\". Thread is \"" << info.GetName() << "\"." |
| 323 | << std::endl |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 324 | << " Cause: " << (was_popped_by_exception ? "exception" : "return ") |
| 325 | << out_val << "."; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | void JNICALL MethodEntryHook(jvmtiEnv* jvmtienv, |
| 329 | JNIEnv* env, |
| 330 | jthread thread, |
| 331 | jmethodID m) { |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame^] | 332 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 333 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 334 | if (!method_info.Init()) { |
| 335 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 336 | return; |
| 337 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame^] | 338 | LOG(INFO) << "Entering method \"" << method_info << "\". Thread is \"" << info.GetName() << "\""; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 339 | } |
| 340 | |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 341 | // The hook we are using. |
| 342 | void JNICALL ClassFileLoadHookSecretNoOp(jvmtiEnv* jvmti, |
| 343 | JNIEnv* jni_env ATTRIBUTE_UNUSED, |
| 344 | jclass class_being_redefined ATTRIBUTE_UNUSED, |
| 345 | jobject loader ATTRIBUTE_UNUSED, |
| 346 | const char* name, |
| 347 | jobject protection_domain ATTRIBUTE_UNUSED, |
| 348 | jint class_data_len, |
| 349 | const unsigned char* class_data, |
| 350 | jint* new_class_data_len, |
| 351 | unsigned char** new_class_data) { |
| 352 | std::vector<unsigned char> out; |
| 353 | std::string name_str(name); |
| 354 | // Make the jvmti semi-descriptor into the java style descriptor (though with $ for inner |
| 355 | // classes). |
| 356 | std::replace(name_str.begin(), name_str.end(), '/', '.'); |
| 357 | StressData* data = nullptr; |
| 358 | CHECK_EQ(jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 359 | JVMTI_ERROR_NONE); |
| 360 | if (!data->vm_class_loader_initialized) { |
| 361 | LOG(WARNING) << "Ignoring load of class " << name << " because VMClassLoader is not yet " |
| 362 | << "initialized. Transforming this class could cause spurious test failures."; |
| 363 | return; |
| 364 | } else if (DoExtractClassFromData(data, name_str, class_data_len, class_data, /*out*/ &out)) { |
| 365 | LOG(INFO) << "Extracted class: " << name; |
| 366 | unsigned char* new_data; |
| 367 | CHECK_EQ(JVMTI_ERROR_NONE, jvmti->Allocate(out.size(), &new_data)); |
| 368 | memcpy(new_data, out.data(), out.size()); |
| 369 | *new_class_data_len = static_cast<jint>(out.size()); |
| 370 | *new_class_data = new_data; |
| 371 | } else { |
| 372 | std::cerr << "Unable to extract class " << name_str << std::endl; |
| 373 | *new_class_data_len = 0; |
| 374 | *new_class_data = nullptr; |
| 375 | } |
| 376 | } |
| 377 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 378 | static std::string AdvanceOption(const std::string& ops) { |
| 379 | return ops.substr(ops.find(',') + 1); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 382 | static bool HasNextOption(const std::string& ops) { |
| 383 | return ops.find(',') != std::string::npos; |
| 384 | } |
| 385 | |
| 386 | static std::string GetOption(const std::string& in) { |
| 387 | return in.substr(0, in.find(',')); |
| 388 | } |
| 389 | |
| 390 | // Options are |
| 391 | // jvmti-stress,[redefine,${DEXTER_BINARY},${TEMP_FILE_1},${TEMP_FILE_2},][trace] |
| 392 | static void ReadOptions(StressData* data, char* options) { |
| 393 | std::string ops(options); |
| 394 | CHECK_EQ(GetOption(ops), "jvmti-stress") << "Options should start with jvmti-stress"; |
| 395 | do { |
| 396 | ops = AdvanceOption(ops); |
| 397 | std::string cur = GetOption(ops); |
| 398 | if (cur == "trace") { |
| 399 | data->trace_stress = true; |
| 400 | } else if (cur == "redefine") { |
| 401 | data->redefine_stress = true; |
| 402 | ops = AdvanceOption(ops); |
| 403 | data->dexter_cmd = GetOption(ops); |
| 404 | ops = AdvanceOption(ops); |
| 405 | data->in_temp_dex = GetOption(ops); |
| 406 | ops = AdvanceOption(ops); |
| 407 | data->out_temp_dex = GetOption(ops); |
| 408 | } else { |
| 409 | LOG(FATAL) << "Unknown option: " << GetOption(ops); |
| 410 | } |
| 411 | } while (HasNextOption(ops)); |
| 412 | } |
| 413 | |
| 414 | // Do final setup during the VMInit callback. By this time most things are all setup. |
| 415 | static void JNICALL PerformFinalSetupVMInit(jvmtiEnv *jvmti_env, |
| 416 | JNIEnv* jni_env, |
| 417 | jthread thread ATTRIBUTE_UNUSED) { |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 418 | // Load the VMClassLoader class. We will get a ClassNotFound exception because we don't have |
| 419 | // visibility but the class will be loaded behind the scenes. |
| 420 | LOG(INFO) << "manual load & initialization of class java/lang/VMClassLoader!"; |
| 421 | jclass klass = jni_env->FindClass("java/lang/VMClassLoader"); |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 422 | StressData* data = nullptr; |
| 423 | CHECK_EQ(jvmti_env->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 424 | JVMTI_ERROR_NONE); |
| 425 | // We need to make sure that VMClassLoader is initialized before we start redefining anything |
| 426 | // since it can give (non-fatal) error messages if it's initialized after we've redefined BCP |
| 427 | // classes. These error messages are expected and no problem but they will mess up our testing |
| 428 | // infrastructure. |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 429 | if (klass == nullptr) { |
Alex Light | 42151c0 | 2017-04-20 15:54:25 -0700 | [diff] [blame] | 430 | // Probably on RI. Clear the exception so we can continue but don't mark vmclassloader as |
| 431 | // initialized. |
| 432 | LOG(WARNING) << "Unable to find VMClassLoader class!"; |
| 433 | jni_env->ExceptionClear(); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 434 | } else { |
| 435 | // GetMethodID is spec'd to cause the class to be initialized. |
| 436 | jni_env->GetMethodID(klass, "hashCode", "()I"); |
| 437 | jni_env->DeleteLocalRef(klass); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 438 | data->vm_class_loader_initialized = true; |
| 439 | } |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 440 | if (data->trace_stress) { |
| 441 | if (jvmti_env->SetEventNotificationMode(JVMTI_ENABLE, |
| 442 | JVMTI_EVENT_METHOD_ENTRY, |
| 443 | nullptr) != JVMTI_ERROR_NONE) { |
| 444 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_METHOD_ENTRY event!"; |
| 445 | } |
| 446 | if (jvmti_env->SetEventNotificationMode(JVMTI_ENABLE, |
| 447 | JVMTI_EVENT_METHOD_EXIT, |
| 448 | nullptr) != JVMTI_ERROR_NONE) { |
| 449 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_METHOD_EXIT event!"; |
| 450 | } |
| 451 | } |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | extern "C" JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM* vm, |
| 455 | char* options, |
| 456 | void* reserved ATTRIBUTE_UNUSED) { |
| 457 | jvmtiEnv* jvmti = nullptr; |
| 458 | if (vm->GetEnv(reinterpret_cast<void**>(&jvmti), JVMTI_VERSION_1_0)) { |
| 459 | LOG(ERROR) << "Unable to get jvmti env."; |
| 460 | return 1; |
| 461 | } |
| 462 | StressData* data = nullptr; |
| 463 | if (JVMTI_ERROR_NONE != jvmti->Allocate(sizeof(StressData), |
| 464 | reinterpret_cast<unsigned char**>(&data))) { |
| 465 | LOG(ERROR) << "Unable to allocate data for stress test."; |
| 466 | return 1; |
| 467 | } |
| 468 | memset(data, 0, sizeof(StressData)); |
| 469 | // Read the options into the static variables that hold them. |
| 470 | ReadOptions(data, options); |
| 471 | // Save the data |
| 472 | if (JVMTI_ERROR_NONE != jvmti->SetEnvironmentLocalStorage(data)) { |
| 473 | LOG(ERROR) << "Unable to save stress test data."; |
| 474 | return 1; |
| 475 | } |
| 476 | |
| 477 | // Just get all capabilities. |
| 478 | jvmtiCapabilities caps; |
| 479 | jvmti->GetPotentialCapabilities(&caps); |
| 480 | jvmti->AddCapabilities(&caps); |
| 481 | |
| 482 | // Set callbacks. |
| 483 | jvmtiEventCallbacks cb; |
| 484 | memset(&cb, 0, sizeof(cb)); |
| 485 | cb.ClassFileLoadHook = ClassFileLoadHookSecretNoOp; |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 486 | cb.NativeMethodBind = doJvmtiMethodBind; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 487 | cb.VMInit = PerformFinalSetupVMInit; |
| 488 | cb.MethodEntry = MethodEntryHook; |
| 489 | cb.MethodExit = MethodExitHook; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 490 | if (jvmti->SetEventCallbacks(&cb, sizeof(cb)) != JVMTI_ERROR_NONE) { |
| 491 | LOG(ERROR) << "Unable to set class file load hook cb!"; |
| 492 | return 1; |
| 493 | } |
| 494 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 495 | JVMTI_EVENT_NATIVE_METHOD_BIND, |
| 496 | nullptr) != JVMTI_ERROR_NONE) { |
| 497 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_NATIVE_METHOD_BIND event!"; |
| 498 | return 1; |
| 499 | } |
| 500 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 501 | JVMTI_EVENT_VM_INIT, |
| 502 | nullptr) != JVMTI_ERROR_NONE) { |
| 503 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_VM_INIT event!"; |
| 504 | return 1; |
| 505 | } |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 506 | if (data->redefine_stress) { |
| 507 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 508 | JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, |
| 509 | nullptr) != JVMTI_ERROR_NONE) { |
| 510 | LOG(ERROR) << "Unable to enable CLASS_FILE_LOAD_HOOK event!"; |
| 511 | return 1; |
| 512 | } |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 513 | } |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | } // namespace art |