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 | |
Andreas Gampe | 8cf9cb3 | 2017-07-19 09:28:38 -0700 | [diff] [blame] | 17 | #include <cstdio> |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 18 | #include <fstream> |
Andreas Gampe | 8cf9cb3 | 2017-07-19 09:28:38 -0700 | [diff] [blame] | 19 | #include <iomanip> |
| 20 | #include <iostream> |
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 <sstream> |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 23 | #include <strstream> |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 24 | |
Andreas Gampe | 8cf9cb3 | 2017-07-19 09:28:38 -0700 | [diff] [blame] | 25 | #include <jni.h> |
| 26 | |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 27 | #include "exec_utils.h" |
Andreas Gampe | 8cf9cb3 | 2017-07-19 09:28:38 -0700 | [diff] [blame] | 28 | #include "jvmti.h" |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 29 | #include "utils.h" |
| 30 | |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 31 | #include "code_ir.h" |
| 32 | #include "control_flow_graph.h" |
| 33 | #include "dex_ir.h" |
| 34 | #include "dex_ir_builder.h" |
| 35 | #include "instrumentation.h" |
| 36 | #include "reader.h" |
| 37 | #include "writer.h" |
| 38 | |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 39 | namespace art { |
| 40 | |
| 41 | // Should we do a 'full_rewrite' with this test? |
| 42 | static constexpr bool kDoFullRewrite = true; |
| 43 | |
| 44 | struct StressData { |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 45 | bool vm_class_loader_initialized; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 46 | bool trace_stress; |
| 47 | bool redefine_stress; |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 48 | bool field_stress; |
Alex Light | c38c369 | 2017-06-27 15:45:14 -0700 | [diff] [blame] | 49 | bool step_stress; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 50 | }; |
| 51 | |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 52 | static bool DoExtractClassFromData(jvmtiEnv* env, |
| 53 | const std::string& descriptor, |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 54 | jint in_len, |
| 55 | const unsigned char* in_data, |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 56 | /*out*/jint* out_len, |
| 57 | /*out*/unsigned char** out_data) { |
| 58 | dex::Reader reader(in_data, in_len); |
| 59 | dex::u4 class_idx = reader.FindClassIndex(descriptor.c_str()); |
| 60 | if (class_idx != dex::kNoIndex) { |
| 61 | reader.CreateClassIr(class_idx); |
| 62 | } else { |
| 63 | LOG(ERROR) << "ERROR: Can't find class " << descriptor; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 64 | return false; |
| 65 | } |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 66 | auto dex_ir = reader.GetIr(); |
| 67 | |
| 68 | if (kDoFullRewrite) { |
| 69 | for (auto& ir_method : dex_ir->encoded_methods) { |
| 70 | if (ir_method->code != nullptr) { |
| 71 | lir::CodeIr code_ir(ir_method.get(), dex_ir); |
| 72 | lir::ControlFlowGraph cfg_compact(&code_ir, false); |
| 73 | lir::ControlFlowGraph cfg_verbose(&code_ir, true); |
| 74 | code_ir.Assemble(); |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | dex::Writer writer(dex_ir); |
| 79 | |
| 80 | struct Allocator : public dex::Writer::Allocator { |
| 81 | explicit Allocator(jvmtiEnv* jvmti_env) : jvmti_env_(jvmti_env) {} |
| 82 | virtual void* Allocate(size_t size) { |
| 83 | unsigned char* out = nullptr; |
| 84 | if (JVMTI_ERROR_NONE != jvmti_env_->Allocate(size, &out)) { |
| 85 | return nullptr; |
| 86 | } else { |
| 87 | return out; |
| 88 | } |
| 89 | } |
| 90 | virtual void Free(void* ptr) { |
| 91 | jvmti_env_->Deallocate(reinterpret_cast<unsigned char*>(ptr)); |
| 92 | } |
| 93 | private: |
| 94 | jvmtiEnv* jvmti_env_; |
| 95 | }; |
| 96 | Allocator alloc(env); |
| 97 | size_t res_len; |
| 98 | unsigned char* res = writer.CreateImage(&alloc, &res_len); |
| 99 | if (res != nullptr) { |
| 100 | *out_data = res; |
| 101 | *out_len = res_len; |
| 102 | return true; |
| 103 | } else { |
| 104 | return false; |
| 105 | } |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 108 | class ScopedThreadInfo { |
| 109 | public: |
| 110 | ScopedThreadInfo(jvmtiEnv* jvmtienv, JNIEnv* env, jthread thread) |
| 111 | : jvmtienv_(jvmtienv), env_(env), free_name_(false) { |
| 112 | memset(&info_, 0, sizeof(info_)); |
| 113 | if (thread == nullptr) { |
| 114 | info_.name = const_cast<char*>("<NULLPTR>"); |
| 115 | } else if (jvmtienv->GetThreadInfo(thread, &info_) != JVMTI_ERROR_NONE) { |
| 116 | info_.name = const_cast<char*>("<UNKNOWN THREAD>"); |
| 117 | } else { |
| 118 | free_name_ = true; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | ~ScopedThreadInfo() { |
| 123 | if (free_name_) { |
| 124 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(info_.name)); |
| 125 | } |
| 126 | env_->DeleteLocalRef(info_.thread_group); |
| 127 | env_->DeleteLocalRef(info_.context_class_loader); |
| 128 | } |
| 129 | |
| 130 | const char* GetName() const { |
| 131 | return info_.name; |
| 132 | } |
| 133 | |
| 134 | private: |
| 135 | jvmtiEnv* jvmtienv_; |
| 136 | JNIEnv* env_; |
| 137 | bool free_name_; |
| 138 | jvmtiThreadInfo info_; |
| 139 | }; |
| 140 | |
| 141 | class ScopedClassInfo { |
| 142 | public: |
| 143 | ScopedClassInfo(jvmtiEnv* jvmtienv, jclass c) |
| 144 | : jvmtienv_(jvmtienv), |
| 145 | class_(c), |
| 146 | name_(nullptr), |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 147 | generic_(nullptr), |
| 148 | file_(nullptr), |
| 149 | debug_ext_(nullptr) {} |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 150 | |
| 151 | ~ScopedClassInfo() { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 152 | if (class_ != nullptr) { |
| 153 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 154 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 155 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(file_)); |
| 156 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(debug_ext_)); |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 157 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | bool Init() { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 161 | if (class_ == nullptr) { |
| 162 | name_ = const_cast<char*>("<NONE>"); |
| 163 | generic_ = const_cast<char*>("<NONE>"); |
| 164 | return true; |
| 165 | } else { |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 166 | jvmtiError ret1 = jvmtienv_->GetSourceFileName(class_, &file_); |
| 167 | jvmtiError ret2 = jvmtienv_->GetSourceDebugExtension(class_, &debug_ext_); |
| 168 | return jvmtienv_->GetClassSignature(class_, &name_, &generic_) == JVMTI_ERROR_NONE && |
| 169 | ret1 != JVMTI_ERROR_MUST_POSSESS_CAPABILITY && |
| 170 | ret1 != JVMTI_ERROR_INVALID_CLASS && |
| 171 | ret2 != JVMTI_ERROR_MUST_POSSESS_CAPABILITY && |
| 172 | ret2 != JVMTI_ERROR_INVALID_CLASS; |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 173 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | jclass GetClass() const { |
| 177 | return class_; |
| 178 | } |
| 179 | const char* GetName() const { |
| 180 | return name_; |
| 181 | } |
| 182 | const char* GetGeneric() const { |
| 183 | return generic_; |
| 184 | } |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 185 | const char* GetSourceDebugExtension() const { |
| 186 | if (debug_ext_ == nullptr) { |
| 187 | return "<UNKNOWN_SOURCE_DEBUG_EXTENSION>"; |
| 188 | } else { |
| 189 | return debug_ext_; |
| 190 | } |
| 191 | } |
| 192 | const char* GetSourceFileName() const { |
| 193 | if (file_ == nullptr) { |
| 194 | return "<UNKNOWN_FILE>"; |
| 195 | } else { |
| 196 | return file_; |
| 197 | } |
| 198 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 199 | |
| 200 | private: |
| 201 | jvmtiEnv* jvmtienv_; |
| 202 | jclass class_; |
| 203 | char* name_; |
| 204 | char* generic_; |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 205 | char* file_; |
| 206 | char* debug_ext_; |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 207 | }; |
| 208 | |
| 209 | class ScopedMethodInfo { |
| 210 | public: |
| 211 | ScopedMethodInfo(jvmtiEnv* jvmtienv, JNIEnv* env, jmethodID m) |
| 212 | : jvmtienv_(jvmtienv), |
| 213 | env_(env), |
| 214 | method_(m), |
| 215 | declaring_class_(nullptr), |
| 216 | class_info_(nullptr), |
| 217 | name_(nullptr), |
| 218 | signature_(nullptr), |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 219 | generic_(nullptr), |
| 220 | first_line_(-1) {} |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 221 | |
| 222 | ~ScopedMethodInfo() { |
| 223 | env_->DeleteLocalRef(declaring_class_); |
| 224 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 225 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(signature_)); |
| 226 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
| 227 | } |
| 228 | |
| 229 | bool Init() { |
| 230 | if (jvmtienv_->GetMethodDeclaringClass(method_, &declaring_class_) != JVMTI_ERROR_NONE) { |
| 231 | return false; |
| 232 | } |
| 233 | class_info_.reset(new ScopedClassInfo(jvmtienv_, declaring_class_)); |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 234 | jint nlines; |
| 235 | jvmtiLineNumberEntry* lines; |
| 236 | jvmtiError err = jvmtienv_->GetLineNumberTable(method_, &nlines, &lines); |
| 237 | if (err == JVMTI_ERROR_NONE) { |
| 238 | if (nlines > 0) { |
| 239 | first_line_ = lines[0].line_number; |
| 240 | } |
| 241 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(lines)); |
| 242 | } else if (err != JVMTI_ERROR_ABSENT_INFORMATION && |
| 243 | err != JVMTI_ERROR_NATIVE_METHOD) { |
| 244 | return false; |
| 245 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 246 | return class_info_->Init() && |
| 247 | (jvmtienv_->GetMethodName(method_, &name_, &signature_, &generic_) == JVMTI_ERROR_NONE); |
| 248 | } |
| 249 | |
| 250 | const ScopedClassInfo& GetDeclaringClassInfo() const { |
| 251 | return *class_info_; |
| 252 | } |
| 253 | |
| 254 | jclass GetDeclaringClass() const { |
| 255 | return declaring_class_; |
| 256 | } |
| 257 | |
| 258 | const char* GetName() const { |
| 259 | return name_; |
| 260 | } |
| 261 | |
| 262 | const char* GetSignature() const { |
| 263 | return signature_; |
| 264 | } |
| 265 | |
| 266 | const char* GetGeneric() const { |
| 267 | return generic_; |
| 268 | } |
| 269 | |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 270 | jint GetFirstLine() const { |
| 271 | return first_line_; |
| 272 | } |
| 273 | |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 274 | private: |
| 275 | jvmtiEnv* jvmtienv_; |
| 276 | JNIEnv* env_; |
| 277 | jmethodID method_; |
| 278 | jclass declaring_class_; |
| 279 | std::unique_ptr<ScopedClassInfo> class_info_; |
| 280 | char* name_; |
| 281 | char* signature_; |
| 282 | char* generic_; |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 283 | jint first_line_; |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 284 | |
| 285 | friend std::ostream& operator<<(std::ostream &os, ScopedMethodInfo const& m); |
| 286 | }; |
| 287 | |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 288 | class ScopedFieldInfo { |
| 289 | public: |
| 290 | ScopedFieldInfo(jvmtiEnv* jvmtienv, jclass field_klass, jfieldID field) |
| 291 | : jvmtienv_(jvmtienv), |
| 292 | declaring_class_(field_klass), |
| 293 | field_(field), |
| 294 | class_info_(nullptr), |
| 295 | name_(nullptr), |
| 296 | type_(nullptr), |
| 297 | generic_(nullptr) {} |
| 298 | |
| 299 | ~ScopedFieldInfo() { |
| 300 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(name_)); |
| 301 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(type_)); |
| 302 | jvmtienv_->Deallocate(reinterpret_cast<unsigned char*>(generic_)); |
| 303 | } |
| 304 | |
| 305 | bool Init() { |
| 306 | class_info_.reset(new ScopedClassInfo(jvmtienv_, declaring_class_)); |
| 307 | return class_info_->Init() && |
| 308 | (jvmtienv_->GetFieldName( |
| 309 | declaring_class_, field_, &name_, &type_, &generic_) == JVMTI_ERROR_NONE); |
| 310 | } |
| 311 | |
| 312 | const ScopedClassInfo& GetDeclaringClassInfo() const { |
| 313 | return *class_info_; |
| 314 | } |
| 315 | |
| 316 | jclass GetDeclaringClass() const { |
| 317 | return declaring_class_; |
| 318 | } |
| 319 | |
| 320 | const char* GetName() const { |
| 321 | return name_; |
| 322 | } |
| 323 | |
| 324 | const char* GetType() const { |
| 325 | return type_; |
| 326 | } |
| 327 | |
| 328 | const char* GetGeneric() const { |
| 329 | return generic_; |
| 330 | } |
| 331 | |
| 332 | private: |
| 333 | jvmtiEnv* jvmtienv_; |
| 334 | jclass declaring_class_; |
| 335 | jfieldID field_; |
| 336 | std::unique_ptr<ScopedClassInfo> class_info_; |
| 337 | char* name_; |
| 338 | char* type_; |
| 339 | char* generic_; |
| 340 | |
| 341 | friend std::ostream& operator<<(std::ostream &os, ScopedFieldInfo const& m); |
| 342 | }; |
| 343 | |
| 344 | std::ostream& operator<<(std::ostream &os, const ScopedFieldInfo* m) { |
| 345 | return os << *m; |
| 346 | } |
| 347 | |
| 348 | std::ostream& operator<<(std::ostream &os, ScopedFieldInfo const& m) { |
| 349 | return os << m.GetDeclaringClassInfo().GetName() << "->" << m.GetName() |
| 350 | << ":" << m.GetType(); |
| 351 | } |
| 352 | |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 353 | std::ostream& operator<<(std::ostream &os, const ScopedMethodInfo* m) { |
| 354 | return os << *m; |
| 355 | } |
| 356 | |
| 357 | std::ostream& operator<<(std::ostream &os, ScopedMethodInfo const& m) { |
Alex Light | 6fa7b81 | 2017-06-16 09:04:29 -0700 | [diff] [blame] | 358 | return os << m.GetDeclaringClassInfo().GetName() << "->" << m.GetName() << m.GetSignature() |
| 359 | << " (source: " << m.GetDeclaringClassInfo().GetSourceFileName() << ":" |
| 360 | << m.GetFirstLine() << ")"; |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 363 | static void doJvmtiMethodBind(jvmtiEnv* jvmtienv, |
| 364 | JNIEnv* env, |
| 365 | jthread thread, |
| 366 | jmethodID m, |
| 367 | void* address, |
| 368 | /*out*/void** out_address) { |
| 369 | *out_address = address; |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 370 | ScopedThreadInfo thread_info(jvmtienv, env, thread); |
| 371 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 372 | if (!method_info.Init()) { |
| 373 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 374 | return; |
| 375 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 376 | LOG(INFO) << "Loading native method \"" << method_info << "\". Thread is " |
| 377 | << thread_info.GetName(); |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 378 | } |
| 379 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 380 | static std::string GetName(jvmtiEnv* jvmtienv, JNIEnv* jnienv, jobject obj) { |
| 381 | jclass klass = jnienv->GetObjectClass(obj); |
| 382 | char *cname, *cgen; |
| 383 | if (jvmtienv->GetClassSignature(klass, &cname, &cgen) != JVMTI_ERROR_NONE) { |
| 384 | LOG(ERROR) << "Unable to get class name!"; |
| 385 | jnienv->DeleteLocalRef(klass); |
| 386 | return "<UNKNOWN>"; |
| 387 | } |
| 388 | std::string name(cname); |
| 389 | if (name == "Ljava/lang/String;") { |
| 390 | jstring str = reinterpret_cast<jstring>(obj); |
| 391 | const char* val = jnienv->GetStringUTFChars(str, nullptr); |
| 392 | if (val == nullptr) { |
| 393 | name += " (unable to get value)"; |
| 394 | } else { |
| 395 | std::ostringstream oss; |
| 396 | oss << name << " (value: \"" << val << "\")"; |
| 397 | name = oss.str(); |
| 398 | jnienv->ReleaseStringUTFChars(str, val); |
| 399 | } |
| 400 | } |
| 401 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(cname)); |
| 402 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(cgen)); |
| 403 | jnienv->DeleteLocalRef(klass); |
| 404 | return name; |
| 405 | } |
| 406 | |
| 407 | static std::string GetValOf(jvmtiEnv* env, JNIEnv* jnienv, std::string type, jvalue val) { |
| 408 | std::ostringstream oss; |
| 409 | switch (type[0]) { |
| 410 | case '[': |
| 411 | case 'L': |
| 412 | return val.l != nullptr ? GetName(env, jnienv, val.l) : "null"; |
| 413 | case 'Z': |
| 414 | return val.z == JNI_TRUE ? "true" : "false"; |
| 415 | case 'B': |
| 416 | oss << val.b; |
| 417 | return oss.str(); |
| 418 | case 'C': |
| 419 | oss << val.c; |
| 420 | return oss.str(); |
| 421 | case 'S': |
| 422 | oss << val.s; |
| 423 | return oss.str(); |
| 424 | case 'I': |
| 425 | oss << val.i; |
| 426 | return oss.str(); |
| 427 | case 'J': |
| 428 | oss << val.j; |
| 429 | return oss.str(); |
| 430 | case 'F': |
| 431 | oss << val.f; |
| 432 | return oss.str(); |
| 433 | case 'D': |
| 434 | oss << val.d; |
| 435 | return oss.str(); |
| 436 | case 'V': |
| 437 | return "<void>"; |
| 438 | default: |
| 439 | return "<ERROR Found type " + type + ">"; |
| 440 | } |
| 441 | } |
| 442 | |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 443 | void JNICALL FieldAccessHook(jvmtiEnv* jvmtienv, |
| 444 | JNIEnv* env, |
| 445 | jthread thread, |
| 446 | jmethodID m, |
| 447 | jlocation location, |
| 448 | jclass field_klass, |
| 449 | jobject object, |
| 450 | jfieldID field) { |
| 451 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 452 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 453 | ScopedFieldInfo field_info(jvmtienv, field_klass, field); |
| 454 | jclass oklass = (object != nullptr) ? env->GetObjectClass(object) : nullptr; |
| 455 | ScopedClassInfo obj_class_info(jvmtienv, oklass); |
| 456 | if (!method_info.Init() || !field_info.Init() || !obj_class_info.Init()) { |
| 457 | LOG(ERROR) << "Unable to get callback info!"; |
| 458 | return; |
| 459 | } |
| 460 | LOG(INFO) << "ACCESS field \"" << field_info << "\" on object of " |
| 461 | << "type \"" << obj_class_info.GetName() << "\" in method \"" << method_info |
| 462 | << "\" at location 0x" << std::hex << location << ". Thread is \"" |
| 463 | << info.GetName() << "\"."; |
| 464 | env->DeleteLocalRef(oklass); |
| 465 | } |
| 466 | |
| 467 | static std::string PrintJValue(jvmtiEnv* jvmtienv, JNIEnv* env, char type, jvalue new_value) { |
| 468 | std::ostringstream oss; |
| 469 | switch (type) { |
| 470 | case 'L': { |
| 471 | jobject nv = new_value.l; |
| 472 | if (nv == nullptr) { |
| 473 | oss << "\"null\""; |
| 474 | } else { |
| 475 | jclass nv_klass = env->GetObjectClass(nv); |
| 476 | ScopedClassInfo nv_class_info(jvmtienv, nv_klass); |
| 477 | if (!nv_class_info.Init()) { |
| 478 | oss << "with unknown type"; |
| 479 | } else { |
| 480 | oss << "of type \"" << nv_class_info.GetName() << "\""; |
| 481 | } |
| 482 | env->DeleteLocalRef(nv_klass); |
| 483 | } |
| 484 | break; |
| 485 | } |
| 486 | case 'Z': { |
| 487 | if (new_value.z) { |
| 488 | oss << "true"; |
| 489 | } else { |
| 490 | oss << "false"; |
| 491 | } |
| 492 | break; |
| 493 | } |
| 494 | #define SEND_VALUE(chr, sym, type) \ |
| 495 | case chr: { \ |
| 496 | oss << static_cast<type>(new_value.sym); \ |
| 497 | break; \ |
| 498 | } |
| 499 | SEND_VALUE('B', b, int8_t); |
| 500 | SEND_VALUE('C', c, uint16_t); |
| 501 | SEND_VALUE('S', s, int16_t); |
| 502 | SEND_VALUE('I', i, int32_t); |
| 503 | SEND_VALUE('J', j, int64_t); |
| 504 | SEND_VALUE('F', f, float); |
| 505 | SEND_VALUE('D', d, double); |
| 506 | #undef SEND_VALUE |
| 507 | } |
| 508 | return oss.str(); |
| 509 | } |
| 510 | |
| 511 | void JNICALL FieldModificationHook(jvmtiEnv* jvmtienv, |
| 512 | JNIEnv* env, |
| 513 | jthread thread, |
| 514 | jmethodID m, |
| 515 | jlocation location, |
| 516 | jclass field_klass, |
| 517 | jobject object, |
| 518 | jfieldID field, |
| 519 | char type, |
| 520 | jvalue new_value) { |
| 521 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 522 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 523 | ScopedFieldInfo field_info(jvmtienv, field_klass, field); |
| 524 | jclass oklass = (object != nullptr) ? env->GetObjectClass(object) : nullptr; |
| 525 | ScopedClassInfo obj_class_info(jvmtienv, oklass); |
| 526 | if (!method_info.Init() || !field_info.Init() || !obj_class_info.Init()) { |
| 527 | LOG(ERROR) << "Unable to get callback info!"; |
| 528 | return; |
| 529 | } |
| 530 | LOG(INFO) << "MODIFY field \"" << field_info << "\" on object of " |
| 531 | << "type \"" << obj_class_info.GetName() << "\" in method \"" << method_info |
| 532 | << "\" at location 0x" << std::hex << location << std::dec << ". New value is " |
| 533 | << PrintJValue(jvmtienv, env, type, new_value) << ". Thread is \"" |
| 534 | << info.GetName() << "\"."; |
| 535 | env->DeleteLocalRef(oklass); |
| 536 | } |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 537 | void JNICALL MethodExitHook(jvmtiEnv* jvmtienv, |
| 538 | JNIEnv* env, |
| 539 | jthread thread, |
| 540 | jmethodID m, |
| 541 | jboolean was_popped_by_exception, |
| 542 | jvalue val) { |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 543 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 544 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 545 | if (!method_info.Init()) { |
| 546 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 547 | return; |
| 548 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 549 | std::string type(method_info.GetSignature()); |
Andreas Gampe | 5555dd1 | 2017-08-24 13:50:21 -0700 | [diff] [blame] | 550 | type = type.substr(type.find(')') + 1); |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 551 | 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] | 552 | LOG(INFO) << "Leaving method \"" << method_info << "\". Thread is \"" << info.GetName() << "\"." |
| 553 | << std::endl |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 554 | << " Cause: " << (was_popped_by_exception ? "exception" : "return ") |
| 555 | << out_val << "."; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | void JNICALL MethodEntryHook(jvmtiEnv* jvmtienv, |
| 559 | JNIEnv* env, |
| 560 | jthread thread, |
| 561 | jmethodID m) { |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 562 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 563 | ScopedMethodInfo method_info(jvmtienv, env, m); |
| 564 | if (!method_info.Init()) { |
| 565 | LOG(ERROR) << "Unable to get method info!"; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 566 | return; |
| 567 | } |
Alex Light | bad2f51 | 2017-06-14 11:33:55 -0700 | [diff] [blame] | 568 | LOG(INFO) << "Entering method \"" << method_info << "\". Thread is \"" << info.GetName() << "\""; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 569 | } |
| 570 | |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 571 | void JNICALL ClassPrepareHook(jvmtiEnv* jvmtienv, |
| 572 | JNIEnv* env, |
| 573 | jthread thread, |
| 574 | jclass klass) { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 575 | StressData* data = nullptr; |
| 576 | CHECK_EQ(jvmtienv->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 577 | JVMTI_ERROR_NONE); |
| 578 | if (data->field_stress) { |
| 579 | jint nfields; |
| 580 | jfieldID* fields; |
| 581 | if (jvmtienv->GetClassFields(klass, &nfields, &fields) != JVMTI_ERROR_NONE) { |
| 582 | LOG(ERROR) << "Unable to get a classes fields!"; |
| 583 | return; |
| 584 | } |
| 585 | for (jint i = 0; i < nfields; i++) { |
| 586 | jfieldID f = fields[i]; |
| 587 | // Ignore errors |
| 588 | jvmtienv->SetFieldAccessWatch(klass, f); |
| 589 | jvmtienv->SetFieldModificationWatch(klass, f); |
| 590 | } |
| 591 | jvmtienv->Deallocate(reinterpret_cast<unsigned char*>(fields)); |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 592 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 593 | if (data->trace_stress) { |
| 594 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 595 | ScopedClassInfo class_info(jvmtienv, klass); |
| 596 | if (!class_info.Init()) { |
| 597 | LOG(ERROR) << "Unable to get class info!"; |
| 598 | return; |
| 599 | } |
| 600 | LOG(INFO) << "Prepared class \"" << class_info.GetName() << "\". Thread is \"" |
| 601 | << info.GetName() << "\""; |
| 602 | } |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 603 | } |
| 604 | |
Alex Light | c38c369 | 2017-06-27 15:45:14 -0700 | [diff] [blame] | 605 | void JNICALL SingleStepHook(jvmtiEnv* jvmtienv, |
| 606 | JNIEnv* env, |
| 607 | jthread thread, |
| 608 | jmethodID method, |
| 609 | jlocation location) { |
| 610 | ScopedThreadInfo info(jvmtienv, env, thread); |
| 611 | ScopedMethodInfo method_info(jvmtienv, env, method); |
| 612 | if (!method_info.Init()) { |
| 613 | LOG(ERROR) << "Unable to get method info!"; |
| 614 | return; |
| 615 | } |
| 616 | LOG(INFO) << "Single step at location: 0x" << std::setw(8) << std::setfill('0') << std::hex |
| 617 | << location << " in method " << method_info << " thread: " << info.GetName(); |
| 618 | } |
| 619 | |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 620 | // The hook we are using. |
| 621 | void JNICALL ClassFileLoadHookSecretNoOp(jvmtiEnv* jvmti, |
| 622 | JNIEnv* jni_env ATTRIBUTE_UNUSED, |
| 623 | jclass class_being_redefined ATTRIBUTE_UNUSED, |
| 624 | jobject loader ATTRIBUTE_UNUSED, |
| 625 | const char* name, |
| 626 | jobject protection_domain ATTRIBUTE_UNUSED, |
| 627 | jint class_data_len, |
| 628 | const unsigned char* class_data, |
| 629 | jint* new_class_data_len, |
| 630 | unsigned char** new_class_data) { |
| 631 | std::vector<unsigned char> out; |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 632 | // Make the jvmti semi-descriptor into the full descriptor. |
| 633 | std::string name_str("L"); |
| 634 | name_str += name; |
| 635 | name_str += ";"; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 636 | StressData* data = nullptr; |
| 637 | CHECK_EQ(jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 638 | JVMTI_ERROR_NONE); |
| 639 | if (!data->vm_class_loader_initialized) { |
| 640 | LOG(WARNING) << "Ignoring load of class " << name << " because VMClassLoader is not yet " |
| 641 | << "initialized. Transforming this class could cause spurious test failures."; |
| 642 | return; |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 643 | } else if (DoExtractClassFromData(jvmti, name_str, class_data_len, class_data, |
| 644 | /*out*/ new_class_data_len, /*out*/ new_class_data)) { |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 645 | LOG(INFO) << "Extracted class: " << name; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 646 | } else { |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 647 | std::cerr << "Unable to extract class " << name << std::endl; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 648 | *new_class_data_len = 0; |
| 649 | *new_class_data = nullptr; |
| 650 | } |
| 651 | } |
| 652 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 653 | static std::string AdvanceOption(const std::string& ops) { |
| 654 | return ops.substr(ops.find(',') + 1); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 655 | } |
| 656 | |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 657 | static bool HasNextOption(const std::string& ops) { |
| 658 | return ops.find(',') != std::string::npos; |
| 659 | } |
| 660 | |
| 661 | static std::string GetOption(const std::string& in) { |
| 662 | return in.substr(0, in.find(',')); |
| 663 | } |
| 664 | |
| 665 | // Options are |
Alex Light | ceae954 | 2017-09-07 13:28:00 -0700 | [diff] [blame^] | 666 | // jvmti-stress,[redefine,][trace,][field] |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 667 | static void ReadOptions(StressData* data, char* options) { |
| 668 | std::string ops(options); |
| 669 | CHECK_EQ(GetOption(ops), "jvmti-stress") << "Options should start with jvmti-stress"; |
| 670 | do { |
| 671 | ops = AdvanceOption(ops); |
| 672 | std::string cur = GetOption(ops); |
| 673 | if (cur == "trace") { |
| 674 | data->trace_stress = true; |
Alex Light | c38c369 | 2017-06-27 15:45:14 -0700 | [diff] [blame] | 675 | } else if (cur == "step") { |
| 676 | data->step_stress = true; |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 677 | } else if (cur == "field") { |
| 678 | data->field_stress = true; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 679 | } else if (cur == "redefine") { |
| 680 | data->redefine_stress = true; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 681 | } else { |
| 682 | LOG(FATAL) << "Unknown option: " << GetOption(ops); |
| 683 | } |
| 684 | } while (HasNextOption(ops)); |
| 685 | } |
| 686 | |
| 687 | // Do final setup during the VMInit callback. By this time most things are all setup. |
| 688 | static void JNICALL PerformFinalSetupVMInit(jvmtiEnv *jvmti_env, |
| 689 | JNIEnv* jni_env, |
| 690 | jthread thread ATTRIBUTE_UNUSED) { |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 691 | // Load the VMClassLoader class. We will get a ClassNotFound exception because we don't have |
| 692 | // visibility but the class will be loaded behind the scenes. |
| 693 | LOG(INFO) << "manual load & initialization of class java/lang/VMClassLoader!"; |
| 694 | jclass klass = jni_env->FindClass("java/lang/VMClassLoader"); |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 695 | StressData* data = nullptr; |
| 696 | CHECK_EQ(jvmti_env->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)), |
| 697 | JVMTI_ERROR_NONE); |
| 698 | // We need to make sure that VMClassLoader is initialized before we start redefining anything |
| 699 | // since it can give (non-fatal) error messages if it's initialized after we've redefined BCP |
| 700 | // classes. These error messages are expected and no problem but they will mess up our testing |
| 701 | // infrastructure. |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 702 | if (klass == nullptr) { |
Alex Light | 42151c0 | 2017-04-20 15:54:25 -0700 | [diff] [blame] | 703 | // Probably on RI. Clear the exception so we can continue but don't mark vmclassloader as |
| 704 | // initialized. |
| 705 | LOG(WARNING) << "Unable to find VMClassLoader class!"; |
| 706 | jni_env->ExceptionClear(); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 707 | } else { |
| 708 | // GetMethodID is spec'd to cause the class to be initialized. |
| 709 | jni_env->GetMethodID(klass, "hashCode", "()I"); |
| 710 | jni_env->DeleteLocalRef(klass); |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 711 | data->vm_class_loader_initialized = true; |
| 712 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | static bool WatchAllFields(JavaVM* vm, jvmtiEnv* jvmti) { |
| 716 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 717 | JVMTI_EVENT_CLASS_PREPARE, |
| 718 | nullptr) != JVMTI_ERROR_NONE) { |
| 719 | LOG(ERROR) << "Couldn't set prepare event!"; |
| 720 | return false; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 721 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 722 | // TODO We really shouldn't need to do this step here. |
| 723 | jint nklass; |
| 724 | jclass* klasses; |
| 725 | if (jvmti->GetLoadedClasses(&nklass, &klasses) != JVMTI_ERROR_NONE) { |
| 726 | LOG(WARNING) << "Couldn't get loaded classes! Ignoring."; |
| 727 | return true; |
| 728 | } |
| 729 | JNIEnv* jni = nullptr; |
| 730 | if (vm->GetEnv(reinterpret_cast<void**>(&jni), JNI_VERSION_1_6)) { |
| 731 | LOG(ERROR) << "Unable to get jni env. Ignoring and potentially leaking jobjects."; |
| 732 | return false; |
| 733 | } |
| 734 | for (jint i = 0; i < nklass; i++) { |
| 735 | jclass k = klasses[i]; |
| 736 | ScopedClassInfo sci(jvmti, k); |
| 737 | if (sci.Init()) { |
| 738 | LOG(INFO) << "NOTE: class " << sci.GetName() << " already loaded."; |
| 739 | } |
| 740 | jint nfields; |
| 741 | jfieldID* fields; |
| 742 | jvmtiError err = jvmti->GetClassFields(k, &nfields, &fields); |
| 743 | if (err == JVMTI_ERROR_NONE) { |
| 744 | for (jint j = 0; j < nfields; j++) { |
| 745 | jfieldID f = fields[j]; |
| 746 | if (jvmti->SetFieldModificationWatch(k, f) != JVMTI_ERROR_NONE || |
| 747 | jvmti->SetFieldAccessWatch(k, f) != JVMTI_ERROR_NONE) { |
| 748 | LOG(ERROR) << "Unable to set watches on a field."; |
| 749 | return false; |
| 750 | } |
| 751 | } |
| 752 | } else if (err != JVMTI_ERROR_CLASS_NOT_PREPARED) { |
| 753 | LOG(ERROR) << "Unexpected error getting class fields!"; |
| 754 | return false; |
| 755 | } |
| 756 | jvmti->Deallocate(reinterpret_cast<unsigned char*>(fields)); |
| 757 | jni->DeleteLocalRef(k); |
| 758 | } |
| 759 | jvmti->Deallocate(reinterpret_cast<unsigned char*>(klasses)); |
| 760 | return true; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 761 | } |
| 762 | |
| 763 | extern "C" JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM* vm, |
| 764 | char* options, |
| 765 | void* reserved ATTRIBUTE_UNUSED) { |
| 766 | jvmtiEnv* jvmti = nullptr; |
| 767 | if (vm->GetEnv(reinterpret_cast<void**>(&jvmti), JVMTI_VERSION_1_0)) { |
| 768 | LOG(ERROR) << "Unable to get jvmti env."; |
| 769 | return 1; |
| 770 | } |
| 771 | StressData* data = nullptr; |
| 772 | if (JVMTI_ERROR_NONE != jvmti->Allocate(sizeof(StressData), |
| 773 | reinterpret_cast<unsigned char**>(&data))) { |
| 774 | LOG(ERROR) << "Unable to allocate data for stress test."; |
| 775 | return 1; |
| 776 | } |
| 777 | memset(data, 0, sizeof(StressData)); |
| 778 | // Read the options into the static variables that hold them. |
| 779 | ReadOptions(data, options); |
| 780 | // Save the data |
| 781 | if (JVMTI_ERROR_NONE != jvmti->SetEnvironmentLocalStorage(data)) { |
| 782 | LOG(ERROR) << "Unable to save stress test data."; |
| 783 | return 1; |
| 784 | } |
| 785 | |
| 786 | // Just get all capabilities. |
Alex Light | 3d324fd | 2017-07-20 15:38:52 -0700 | [diff] [blame] | 787 | jvmtiCapabilities caps = { |
| 788 | .can_tag_objects = 0, |
| 789 | .can_generate_field_modification_events = 1, |
| 790 | .can_generate_field_access_events = 1, |
| 791 | .can_get_bytecodes = 0, |
| 792 | .can_get_synthetic_attribute = 0, |
| 793 | .can_get_owned_monitor_info = 0, |
| 794 | .can_get_current_contended_monitor = 0, |
| 795 | .can_get_monitor_info = 0, |
| 796 | .can_pop_frame = 0, |
| 797 | .can_redefine_classes = 1, |
| 798 | .can_signal_thread = 0, |
| 799 | .can_get_source_file_name = 1, |
| 800 | .can_get_line_numbers = 1, |
| 801 | .can_get_source_debug_extension = 0, |
| 802 | .can_access_local_variables = 0, |
| 803 | .can_maintain_original_method_order = 0, |
| 804 | .can_generate_single_step_events = 1, |
| 805 | .can_generate_exception_events = 0, |
| 806 | .can_generate_frame_pop_events = 0, |
| 807 | .can_generate_breakpoint_events = 0, |
| 808 | .can_suspend = 0, |
| 809 | .can_redefine_any_class = 0, |
| 810 | .can_get_current_thread_cpu_time = 0, |
| 811 | .can_get_thread_cpu_time = 0, |
| 812 | .can_generate_method_entry_events = 1, |
| 813 | .can_generate_method_exit_events = 1, |
| 814 | .can_generate_all_class_hook_events = 0, |
| 815 | .can_generate_compiled_method_load_events = 0, |
| 816 | .can_generate_monitor_events = 0, |
| 817 | .can_generate_vm_object_alloc_events = 0, |
| 818 | .can_generate_native_method_bind_events = 1, |
| 819 | .can_generate_garbage_collection_events = 0, |
| 820 | .can_generate_object_free_events = 0, |
| 821 | .can_force_early_return = 0, |
| 822 | .can_get_owned_monitor_stack_depth_info = 0, |
| 823 | .can_get_constant_pool = 0, |
| 824 | .can_set_native_method_prefix = 0, |
| 825 | .can_retransform_classes = 1, |
| 826 | .can_retransform_any_class = 0, |
| 827 | .can_generate_resource_exhaustion_heap_events = 0, |
| 828 | .can_generate_resource_exhaustion_threads_events = 0, |
| 829 | }; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 830 | jvmti->AddCapabilities(&caps); |
| 831 | |
| 832 | // Set callbacks. |
| 833 | jvmtiEventCallbacks cb; |
| 834 | memset(&cb, 0, sizeof(cb)); |
| 835 | cb.ClassFileLoadHook = ClassFileLoadHookSecretNoOp; |
Alex Light | 0af8cde | 2017-04-20 13:35:05 -0700 | [diff] [blame] | 836 | cb.NativeMethodBind = doJvmtiMethodBind; |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 837 | cb.VMInit = PerformFinalSetupVMInit; |
| 838 | cb.MethodEntry = MethodEntryHook; |
| 839 | cb.MethodExit = MethodExitHook; |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 840 | cb.FieldAccess = FieldAccessHook; |
| 841 | cb.FieldModification = FieldModificationHook; |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 842 | cb.ClassPrepare = ClassPrepareHook; |
Alex Light | c38c369 | 2017-06-27 15:45:14 -0700 | [diff] [blame] | 843 | cb.SingleStep = SingleStepHook; |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 844 | if (jvmti->SetEventCallbacks(&cb, sizeof(cb)) != JVMTI_ERROR_NONE) { |
| 845 | LOG(ERROR) << "Unable to set class file load hook cb!"; |
| 846 | return 1; |
| 847 | } |
| 848 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 849 | JVMTI_EVENT_VM_INIT, |
| 850 | nullptr) != JVMTI_ERROR_NONE) { |
| 851 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_VM_INIT event!"; |
| 852 | return 1; |
| 853 | } |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 854 | if (data->redefine_stress) { |
| 855 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 856 | JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, |
| 857 | nullptr) != JVMTI_ERROR_NONE) { |
| 858 | LOG(ERROR) << "Unable to enable CLASS_FILE_LOAD_HOOK event!"; |
| 859 | return 1; |
| 860 | } |
| 861 | } |
Alex Light | 7239865 | 2017-06-16 09:08:12 -0700 | [diff] [blame] | 862 | if (data->trace_stress) { |
| 863 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 864 | JVMTI_EVENT_CLASS_PREPARE, |
| 865 | nullptr) != JVMTI_ERROR_NONE) { |
| 866 | LOG(ERROR) << "Unable to enable CLASS_PREPARE event!"; |
| 867 | return 1; |
| 868 | } |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 869 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 870 | JVMTI_EVENT_NATIVE_METHOD_BIND, |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 871 | nullptr) != JVMTI_ERROR_NONE) { |
Alex Light | 43e935d | 2017-06-19 15:40:40 -0700 | [diff] [blame] | 872 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_NATIVE_METHOD_BIND event!"; |
| 873 | return 1; |
| 874 | } |
| 875 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 876 | JVMTI_EVENT_METHOD_ENTRY, |
| 877 | nullptr) != JVMTI_ERROR_NONE) { |
| 878 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_METHOD_ENTRY event!"; |
| 879 | return 1; |
| 880 | } |
| 881 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 882 | JVMTI_EVENT_METHOD_EXIT, |
| 883 | nullptr) != JVMTI_ERROR_NONE) { |
| 884 | LOG(ERROR) << "Unable to enable JVMTI_EVENT_METHOD_EXIT event!"; |
| 885 | return 1; |
| 886 | } |
| 887 | } |
| 888 | if (data->field_stress) { |
| 889 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 890 | JVMTI_EVENT_FIELD_MODIFICATION, |
| 891 | nullptr) != JVMTI_ERROR_NONE) { |
| 892 | LOG(ERROR) << "Unable to enable FIELD_MODIFICATION event!"; |
| 893 | return 1; |
| 894 | } |
| 895 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 896 | JVMTI_EVENT_FIELD_ACCESS, |
| 897 | nullptr) != JVMTI_ERROR_NONE) { |
| 898 | LOG(ERROR) << "Unable to enable FIELD_ACCESS event!"; |
| 899 | return 1; |
| 900 | } |
| 901 | if (!WatchAllFields(vm, jvmti)) { |
Alex Light | b7edcda | 2017-04-27 13:20:31 -0700 | [diff] [blame] | 902 | return 1; |
| 903 | } |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 904 | } |
Alex Light | c38c369 | 2017-06-27 15:45:14 -0700 | [diff] [blame] | 905 | if (data->step_stress) { |
| 906 | if (jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
| 907 | JVMTI_EVENT_SINGLE_STEP, |
| 908 | nullptr) != JVMTI_ERROR_NONE) { |
| 909 | return 1; |
| 910 | } |
| 911 | } |
Alex Light | 8f2c6d4 | 2017-04-10 16:27:35 -0700 | [diff] [blame] | 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | } // namespace art |