runtime.cc revision c528dba35b5faece51ca658fc008b688f8b690ad
1/* 2 * Copyright (C) 2011 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 "runtime.h" 18 19// sys/mount.h has to come before linux/fs.h due to redefinition of MS_RDONLY, MS_BIND, etc 20#include <sys/mount.h> 21#include <linux/fs.h> 22 23#include <signal.h> 24#include <sys/syscall.h> 25 26#include <cstdio> 27#include <cstdlib> 28#include <limits> 29#include <vector> 30 31#include "arch/arm/registers_arm.h" 32#include "arch/mips/registers_mips.h" 33#include "arch/x86/registers_x86.h" 34#include "atomic.h" 35#include "class_linker.h" 36#include "debugger.h" 37#include "gc/accounting/card_table-inl.h" 38#include "gc/heap.h" 39#include "gc/space/space.h" 40#include "image.h" 41#include "instrumentation.h" 42#include "intern_table.h" 43#include "invoke_arg_array_builder.h" 44#include "jni_internal.h" 45#include "mirror/art_field-inl.h" 46#include "mirror/art_method-inl.h" 47#include "mirror/array.h" 48#include "mirror/class-inl.h" 49#include "mirror/class_loader.h" 50#include "mirror/stack_trace_element.h" 51#include "mirror/throwable.h" 52#include "monitor.h" 53#include "oat_file.h" 54#include "ScopedLocalRef.h" 55#include "scoped_thread_state_change.h" 56#include "signal_catcher.h" 57#include "signal_set.h" 58#include "sirt_ref.h" 59#include "thread.h" 60#include "thread_list.h" 61#include "trace.h" 62#include "UniquePtr.h" 63#include "verifier/method_verifier.h" 64#include "well_known_classes.h" 65 66#include "JniConstants.h" // Last to avoid LOG redefinition in ics-mr1-plus-art. 67 68namespace art { 69 70Runtime* Runtime::instance_ = NULL; 71 72Runtime::Runtime() 73 : is_compiler_(false), 74 is_zygote_(false), 75 is_concurrent_gc_enabled_(true), 76 is_explicit_gc_disabled_(false), 77 default_stack_size_(0), 78 heap_(NULL), 79 max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation), 80 monitor_list_(NULL), 81 thread_list_(NULL), 82 intern_table_(NULL), 83 class_linker_(NULL), 84 signal_catcher_(NULL), 85 java_vm_(NULL), 86 pre_allocated_OutOfMemoryError_(NULL), 87 resolution_method_(NULL), 88 imt_conflict_method_(NULL), 89 default_imt_(NULL), 90 method_verifiers_lock_("Method verifiers lock"), 91 threads_being_born_(0), 92 shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)), 93 shutting_down_(false), 94 shutting_down_started_(false), 95 started_(false), 96 finished_starting_(false), 97 vfprintf_(NULL), 98 exit_(NULL), 99 abort_(NULL), 100 stats_enabled_(false), 101 method_trace_(0), 102 method_trace_file_size_(0), 103 instrumentation_(), 104 use_compile_time_class_path_(false), 105 main_thread_group_(NULL), 106 system_thread_group_(NULL), 107 system_class_loader_(NULL) { 108 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 109 callee_save_methods_[i] = NULL; 110 } 111} 112 113Runtime::~Runtime() { 114 if (dump_gc_performance_on_shutdown_) { 115 // This can't be called from the Heap destructor below because it 116 // could call RosAlloc::InspectAll() which needs the thread_list 117 // to be still alive. 118 heap_->DumpGcPerformanceInfo(LOG(INFO)); 119 } 120 121 Thread* self = Thread::Current(); 122 { 123 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 124 shutting_down_started_ = true; 125 while (threads_being_born_ > 0) { 126 shutdown_cond_->Wait(self); 127 } 128 shutting_down_ = true; 129 } 130 Trace::Shutdown(); 131 132 // Make sure to let the GC complete if it is running. 133 heap_->WaitForGcToComplete(self); 134 heap_->DeleteThreadPool(); 135 136 // Make sure our internal threads are dead before we start tearing down things they're using. 137 Dbg::StopJdwp(); 138 delete signal_catcher_; 139 140 // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended. 141 delete thread_list_; 142 delete monitor_list_; 143 delete class_linker_; 144 delete heap_; 145 delete intern_table_; 146 delete java_vm_; 147 Thread::Shutdown(); 148 QuasiAtomic::Shutdown(); 149 verifier::MethodVerifier::Shutdown(); 150 // TODO: acquire a static mutex on Runtime to avoid racing. 151 CHECK(instance_ == NULL || instance_ == this); 152 instance_ = NULL; 153} 154 155struct AbortState { 156 void Dump(std::ostream& os) { 157 if (gAborting > 1) { 158 os << "Runtime aborting --- recursively, so no thread-specific detail!\n"; 159 return; 160 } 161 gAborting++; 162 os << "Runtime aborting...\n"; 163 if (Runtime::Current() == NULL) { 164 os << "(Runtime does not yet exist!)\n"; 165 return; 166 } 167 Thread* self = Thread::Current(); 168 if (self == NULL) { 169 os << "(Aborting thread was not attached to runtime!)\n"; 170 } else { 171 // TODO: we're aborting and the ScopedObjectAccess may attempt to acquire the mutator_lock_ 172 // which may block indefinitely if there's a misbehaving thread holding it exclusively. 173 // The code below should be made robust to this. 174 ScopedObjectAccess soa(self); 175 os << "Aborting thread:\n"; 176 self->Dump(os); 177 if (self->IsExceptionPending()) { 178 ThrowLocation throw_location; 179 mirror::Throwable* exception = self->GetException(&throw_location); 180 os << "Pending exception " << PrettyTypeOf(exception) 181 << " thrown by '" << throw_location.Dump() << "'\n" 182 << exception->Dump(); 183 } 184 } 185 DumpAllThreads(os, self); 186 } 187 188 void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS { 189 bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self); 190 bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self); 191 if (!tll_already_held || !ml_already_held) { 192 os << "Dumping all threads without appropriate locks held:" 193 << (!tll_already_held ? " thread list lock" : "") 194 << (!ml_already_held ? " mutator lock" : "") 195 << "\n"; 196 } 197 os << "All threads:\n"; 198 Runtime::Current()->GetThreadList()->DumpLocked(os); 199 } 200}; 201 202void Runtime::Abort() { 203 gAborting++; // set before taking any locks 204 205 // Ensure that we don't have multiple threads trying to abort at once, 206 // which would result in significantly worse diagnostics. 207 MutexLock mu(Thread::Current(), *Locks::abort_lock_); 208 209 // Get any pending output out of the way. 210 fflush(NULL); 211 212 // Many people have difficulty distinguish aborts from crashes, 213 // so be explicit. 214 AbortState state; 215 LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state); 216 217 // Call the abort hook if we have one. 218 if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) { 219 LOG(INTERNAL_FATAL) << "Calling abort hook..."; 220 Runtime::Current()->abort_(); 221 // notreached 222 LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!"; 223 } 224 225#if defined(__GLIBC__) 226 // TODO: we ought to be able to use pthread_kill(3) here (or abort(3), 227 // which POSIX defines in terms of raise(3), which POSIX defines in terms 228 // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through 229 // libpthread, which means the stacks we dump would be useless. Calling 230 // tgkill(2) directly avoids that. 231 syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT); 232 // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM? 233 // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3). 234 exit(1); 235#else 236 abort(); 237#endif 238 // notreached 239} 240 241bool Runtime::PreZygoteFork() { 242 heap_->PreZygoteFork(); 243 return true; 244} 245 246void Runtime::CallExitHook(jint status) { 247 if (exit_ != NULL) { 248 ScopedThreadStateChange tsc(Thread::Current(), kNative); 249 exit_(status); 250 LOG(WARNING) << "Exit hook returned instead of exiting!"; 251 } 252} 253 254// Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify 255// memory sizes. [kK] indicates kilobytes, [mM] megabytes, and 256// [gG] gigabytes. 257// 258// "s" should point just past the "-Xm?" part of the string. 259// "div" specifies a divisor, e.g. 1024 if the value must be a multiple 260// of 1024. 261// 262// The spec says the -Xmx and -Xms options must be multiples of 1024. It 263// doesn't say anything about -Xss. 264// 265// Returns 0 (a useless size) if "s" is malformed or specifies a low or 266// non-evenly-divisible value. 267// 268size_t ParseMemoryOption(const char* s, size_t div) { 269 // strtoul accepts a leading [+-], which we don't want, 270 // so make sure our string starts with a decimal digit. 271 if (isdigit(*s)) { 272 char* s2; 273 size_t val = strtoul(s, &s2, 10); 274 if (s2 != s) { 275 // s2 should be pointing just after the number. 276 // If this is the end of the string, the user 277 // has specified a number of bytes. Otherwise, 278 // there should be exactly one more character 279 // that specifies a multiplier. 280 if (*s2 != '\0') { 281 // The remainder of the string is either a single multiplier 282 // character, or nothing to indicate that the value is in 283 // bytes. 284 char c = *s2++; 285 if (*s2 == '\0') { 286 size_t mul; 287 if (c == '\0') { 288 mul = 1; 289 } else if (c == 'k' || c == 'K') { 290 mul = KB; 291 } else if (c == 'm' || c == 'M') { 292 mul = MB; 293 } else if (c == 'g' || c == 'G') { 294 mul = GB; 295 } else { 296 // Unknown multiplier character. 297 return 0; 298 } 299 300 if (val <= std::numeric_limits<size_t>::max() / mul) { 301 val *= mul; 302 } else { 303 // Clamp to a multiple of 1024. 304 val = std::numeric_limits<size_t>::max() & ~(1024-1); 305 } 306 } else { 307 // There's more than one character after the numeric part. 308 return 0; 309 } 310 } 311 // The man page says that a -Xm value must be a multiple of 1024. 312 if (val % div == 0) { 313 return val; 314 } 315 } 316 } 317 return 0; 318} 319 320size_t ParseIntegerOrDie(const std::string& s) { 321 std::string::size_type colon = s.find(':'); 322 if (colon == std::string::npos) { 323 LOG(FATAL) << "Missing integer: " << s; 324 } 325 const char* begin = &s[colon + 1]; 326 char* end; 327 size_t result = strtoul(begin, &end, 10); 328 if (begin == end || *end != '\0') { 329 LOG(FATAL) << "Failed to parse integer in: " << s; 330 } 331 return result; 332} 333 334void Runtime::SweepSystemWeaks(RootVisitor* visitor, void* arg) { 335 GetInternTable()->SweepInternTableWeaks(visitor, arg); 336 GetMonitorList()->SweepMonitorList(visitor, arg); 337 GetJavaVM()->SweepJniWeakGlobals(visitor, arg); 338} 339 340Runtime::ParsedOptions* Runtime::ParsedOptions::Create(const Options& options, bool ignore_unrecognized) { 341 UniquePtr<ParsedOptions> parsed(new ParsedOptions()); 342 const char* boot_class_path_string = getenv("BOOTCLASSPATH"); 343 if (boot_class_path_string != NULL) { 344 parsed->boot_class_path_string_ = boot_class_path_string; 345 } 346 const char* class_path_string = getenv("CLASSPATH"); 347 if (class_path_string != NULL) { 348 parsed->class_path_string_ = class_path_string; 349 } 350 // -Xcheck:jni is off by default for regular builds but on by default in debug builds. 351 parsed->check_jni_ = kIsDebugBuild; 352 353 parsed->heap_initial_size_ = gc::Heap::kDefaultInitialSize; 354 parsed->heap_maximum_size_ = gc::Heap::kDefaultMaximumSize; 355 parsed->heap_min_free_ = gc::Heap::kDefaultMinFree; 356 parsed->heap_max_free_ = gc::Heap::kDefaultMaxFree; 357 parsed->heap_target_utilization_ = gc::Heap::kDefaultTargetUtilization; 358 parsed->heap_growth_limit_ = 0; // 0 means no growth limit. 359 // Default to number of processors minus one since the main GC thread also does work. 360 parsed->parallel_gc_threads_ = sysconf(_SC_NPROCESSORS_CONF) - 1; 361 // Only the main GC thread, no workers. 362 parsed->conc_gc_threads_ = 0; 363 // Default is CMS which is Sticky + Partial + Full CMS GC. 364 parsed->collector_type_ = gc::kCollectorTypeCMS; 365 parsed->stack_size_ = 0; // 0 means default. 366 parsed->max_spins_before_thin_lock_inflation_ = Monitor::kDefaultMaxSpinsBeforeThinLockInflation; 367 parsed->low_memory_mode_ = false; 368 369 parsed->is_compiler_ = false; 370 parsed->is_zygote_ = false; 371 parsed->interpreter_only_ = false; 372 parsed->is_explicit_gc_disabled_ = false; 373 374 parsed->long_pause_log_threshold_ = gc::Heap::kDefaultLongPauseLogThreshold; 375 parsed->long_gc_log_threshold_ = gc::Heap::kDefaultLongGCLogThreshold; 376 parsed->dump_gc_performance_on_shutdown_ = false; 377 parsed->ignore_max_footprint_ = false; 378 379 parsed->lock_profiling_threshold_ = 0; 380 parsed->hook_is_sensitive_thread_ = NULL; 381 382 parsed->hook_vfprintf_ = vfprintf; 383 parsed->hook_exit_ = exit; 384 parsed->hook_abort_ = NULL; // We don't call abort(3) by default; see Runtime::Abort. 385 386 parsed->compiler_filter_ = Runtime::kDefaultCompilerFilter; 387 parsed->huge_method_threshold_ = Runtime::kDefaultHugeMethodThreshold; 388 parsed->large_method_threshold_ = Runtime::kDefaultLargeMethodThreshold; 389 parsed->small_method_threshold_ = Runtime::kDefaultSmallMethodThreshold; 390 parsed->tiny_method_threshold_ = Runtime::kDefaultTinyMethodThreshold; 391 parsed->num_dex_methods_threshold_ = Runtime::kDefaultNumDexMethodsThreshold; 392 393 parsed->sea_ir_mode_ = false; 394// gLogVerbosity.class_linker = true; // TODO: don't check this in! 395// gLogVerbosity.compiler = true; // TODO: don't check this in! 396// gLogVerbosity.verifier = true; // TODO: don't check this in! 397// gLogVerbosity.heap = true; // TODO: don't check this in! 398// gLogVerbosity.gc = true; // TODO: don't check this in! 399// gLogVerbosity.jdwp = true; // TODO: don't check this in! 400// gLogVerbosity.jni = true; // TODO: don't check this in! 401// gLogVerbosity.monitor = true; // TODO: don't check this in! 402// gLogVerbosity.startup = true; // TODO: don't check this in! 403// gLogVerbosity.third_party_jni = true; // TODO: don't check this in! 404// gLogVerbosity.threads = true; // TODO: don't check this in! 405 406 parsed->method_trace_ = false; 407 parsed->method_trace_file_ = "/data/method-trace-file.bin"; 408 parsed->method_trace_file_size_ = 10 * MB; 409 410 for (size_t i = 0; i < options.size(); ++i) { 411 const std::string option(options[i].first); 412 if (true && options[0].first == "-Xzygote") { 413 LOG(INFO) << "option[" << i << "]=" << option; 414 } 415 if (StartsWith(option, "-Xbootclasspath:")) { 416 parsed->boot_class_path_string_ = option.substr(strlen("-Xbootclasspath:")).data(); 417 } else if (option == "-classpath" || option == "-cp") { 418 // TODO: support -Djava.class.path 419 i++; 420 if (i == options.size()) { 421 // TODO: usage 422 LOG(FATAL) << "Missing required class path value for " << option; 423 return NULL; 424 } 425 const StringPiece& value = options[i].first; 426 parsed->class_path_string_ = value.data(); 427 } else if (option == "bootclasspath") { 428 parsed->boot_class_path_ 429 = reinterpret_cast<const std::vector<const DexFile*>*>(options[i].second); 430 } else if (StartsWith(option, "-Ximage:")) { 431 parsed->image_ = option.substr(strlen("-Ximage:")).data(); 432 } else if (StartsWith(option, "-Xcheck:jni")) { 433 parsed->check_jni_ = true; 434 } else if (StartsWith(option, "-Xrunjdwp:") || StartsWith(option, "-agentlib:jdwp=")) { 435 std::string tail(option.substr(option[1] == 'X' ? 10 : 15)); 436 if (tail == "help" || !Dbg::ParseJdwpOptions(tail)) { 437 LOG(FATAL) << "Example: -Xrunjdwp:transport=dt_socket,address=8000,server=y\n" 438 << "Example: -Xrunjdwp:transport=dt_socket,address=localhost:6500,server=n"; 439 return NULL; 440 } 441 } else if (StartsWith(option, "-Xms")) { 442 size_t size = ParseMemoryOption(option.substr(strlen("-Xms")).c_str(), 1024); 443 if (size == 0) { 444 if (ignore_unrecognized) { 445 continue; 446 } 447 // TODO: usage 448 LOG(FATAL) << "Failed to parse " << option; 449 return NULL; 450 } 451 parsed->heap_initial_size_ = size; 452 } else if (StartsWith(option, "-Xmx")) { 453 size_t size = ParseMemoryOption(option.substr(strlen("-Xmx")).c_str(), 1024); 454 if (size == 0) { 455 if (ignore_unrecognized) { 456 continue; 457 } 458 // TODO: usage 459 LOG(FATAL) << "Failed to parse " << option; 460 return NULL; 461 } 462 parsed->heap_maximum_size_ = size; 463 } else if (StartsWith(option, "-XX:HeapGrowthLimit=")) { 464 size_t size = ParseMemoryOption(option.substr(strlen("-XX:HeapGrowthLimit=")).c_str(), 1024); 465 if (size == 0) { 466 if (ignore_unrecognized) { 467 continue; 468 } 469 // TODO: usage 470 LOG(FATAL) << "Failed to parse " << option; 471 return NULL; 472 } 473 parsed->heap_growth_limit_ = size; 474 } else if (StartsWith(option, "-XX:HeapMinFree=")) { 475 size_t size = ParseMemoryOption(option.substr(strlen("-XX:HeapMinFree=")).c_str(), 1024); 476 if (size == 0) { 477 if (ignore_unrecognized) { 478 continue; 479 } 480 // TODO: usage 481 LOG(FATAL) << "Failed to parse " << option; 482 return NULL; 483 } 484 parsed->heap_min_free_ = size; 485 } else if (StartsWith(option, "-XX:HeapMaxFree=")) { 486 size_t size = ParseMemoryOption(option.substr(strlen("-XX:HeapMaxFree=")).c_str(), 1024); 487 if (size == 0) { 488 if (ignore_unrecognized) { 489 continue; 490 } 491 // TODO: usage 492 LOG(FATAL) << "Failed to parse " << option; 493 return NULL; 494 } 495 parsed->heap_max_free_ = size; 496 } else if (StartsWith(option, "-XX:HeapTargetUtilization=")) { 497 std::istringstream iss(option.substr(strlen("-XX:HeapTargetUtilization="))); 498 double value; 499 iss >> value; 500 // Ensure that we have a value, there was no cruft after it and it satisfies a sensible range. 501 const bool sane_val = iss.eof() && (value >= 0.1) && (value <= 0.9); 502 if (!sane_val) { 503 if (ignore_unrecognized) { 504 continue; 505 } 506 LOG(FATAL) << "Invalid option '" << option << "'"; 507 return NULL; 508 } 509 parsed->heap_target_utilization_ = value; 510 } else if (StartsWith(option, "-XX:ParallelGCThreads=")) { 511 parsed->parallel_gc_threads_ = 512 ParseMemoryOption(option.substr(strlen("-XX:ParallelGCThreads=")).c_str(), 1024); 513 } else if (StartsWith(option, "-XX:ConcGCThreads=")) { 514 parsed->conc_gc_threads_ = 515 ParseMemoryOption(option.substr(strlen("-XX:ConcGCThreads=")).c_str(), 1024); 516 } else if (StartsWith(option, "-Xss")) { 517 size_t size = ParseMemoryOption(option.substr(strlen("-Xss")).c_str(), 1); 518 if (size == 0) { 519 if (ignore_unrecognized) { 520 continue; 521 } 522 // TODO: usage 523 LOG(FATAL) << "Failed to parse " << option; 524 return NULL; 525 } 526 parsed->stack_size_ = size; 527 } else if (StartsWith(option, "-XX:MaxSpinsBeforeThinLockInflation=")) { 528 parsed->max_spins_before_thin_lock_inflation_ = 529 strtoul(option.substr(strlen("-XX:MaxSpinsBeforeThinLockInflation=")).c_str(), 530 nullptr, 10); 531 } else if (option == "-XX:LongPauseLogThreshold") { 532 parsed->long_pause_log_threshold_ = 533 ParseMemoryOption(option.substr(strlen("-XX:LongPauseLogThreshold=")).c_str(), 1024); 534 } else if (option == "-XX:LongGCLogThreshold") { 535 parsed->long_gc_log_threshold_ = 536 ParseMemoryOption(option.substr(strlen("-XX:LongGCLogThreshold")).c_str(), 1024); 537 } else if (option == "-XX:DumpGCPerformanceOnShutdown") { 538 parsed->dump_gc_performance_on_shutdown_ = true; 539 } else if (option == "-XX:IgnoreMaxFootprint") { 540 parsed->ignore_max_footprint_ = true; 541 } else if (option == "-XX:LowMemoryMode") { 542 parsed->low_memory_mode_ = true; 543 } else if (StartsWith(option, "-D")) { 544 parsed->properties_.push_back(option.substr(strlen("-D"))); 545 } else if (StartsWith(option, "-Xjnitrace:")) { 546 parsed->jni_trace_ = option.substr(strlen("-Xjnitrace:")); 547 } else if (option == "compiler") { 548 parsed->is_compiler_ = true; 549 } else if (option == "-Xzygote") { 550 parsed->is_zygote_ = true; 551 } else if (option == "-Xint") { 552 parsed->interpreter_only_ = true; 553 } else if (StartsWith(option, "-Xgc:")) { 554 std::vector<std::string> gc_options; 555 Split(option.substr(strlen("-Xgc:")), ',', gc_options); 556 for (size_t i = 0; i < gc_options.size(); ++i) { 557 if (gc_options[i] == "MS" || gc_options[i] == "nonconcurrent") { 558 parsed->collector_type_ = gc::kCollectorTypeMS; 559 } else if (gc_options[i] == "CMS" || gc_options[i] == "concurrent") { 560 parsed->collector_type_ = gc::kCollectorTypeCMS; 561 } else if (gc_options[i] == "SS") { 562 parsed->collector_type_ = gc::kCollectorTypeSS; 563 } else { 564 LOG(WARNING) << "Ignoring unknown -Xgc option: " << gc_options[i]; 565 } 566 } 567 } else if (option == "-XX:+DisableExplicitGC") { 568 parsed->is_explicit_gc_disabled_ = true; 569 } else if (StartsWith(option, "-verbose:")) { 570 std::vector<std::string> verbose_options; 571 Split(option.substr(strlen("-verbose:")), ',', verbose_options); 572 for (size_t i = 0; i < verbose_options.size(); ++i) { 573 if (verbose_options[i] == "class") { 574 gLogVerbosity.class_linker = true; 575 } else if (verbose_options[i] == "verifier") { 576 gLogVerbosity.verifier = true; 577 } else if (verbose_options[i] == "compiler") { 578 gLogVerbosity.compiler = true; 579 } else if (verbose_options[i] == "heap") { 580 gLogVerbosity.heap = true; 581 } else if (verbose_options[i] == "gc") { 582 gLogVerbosity.gc = true; 583 } else if (verbose_options[i] == "jdwp") { 584 gLogVerbosity.jdwp = true; 585 } else if (verbose_options[i] == "jni") { 586 gLogVerbosity.jni = true; 587 } else if (verbose_options[i] == "monitor") { 588 gLogVerbosity.monitor = true; 589 } else if (verbose_options[i] == "startup") { 590 gLogVerbosity.startup = true; 591 } else if (verbose_options[i] == "third-party-jni") { 592 gLogVerbosity.third_party_jni = true; 593 } else if (verbose_options[i] == "threads") { 594 gLogVerbosity.threads = true; 595 } else { 596 LOG(WARNING) << "Ignoring unknown -verbose option: " << verbose_options[i]; 597 } 598 } 599 } else if (StartsWith(option, "-Xjnigreflimit:")) { 600 // Silently ignored for backwards compatibility. 601 } else if (StartsWith(option, "-Xlockprofthreshold:")) { 602 parsed->lock_profiling_threshold_ = ParseIntegerOrDie(option); 603 } else if (StartsWith(option, "-Xstacktracefile:")) { 604 parsed->stack_trace_file_ = option.substr(strlen("-Xstacktracefile:")); 605 } else if (option == "sensitiveThread") { 606 parsed->hook_is_sensitive_thread_ = reinterpret_cast<bool (*)()>(const_cast<void*>(options[i].second)); 607 } else if (option == "vfprintf") { 608 parsed->hook_vfprintf_ = 609 reinterpret_cast<int (*)(FILE *, const char*, va_list)>(const_cast<void*>(options[i].second)); 610 } else if (option == "exit") { 611 parsed->hook_exit_ = reinterpret_cast<void(*)(jint)>(const_cast<void*>(options[i].second)); 612 } else if (option == "abort") { 613 parsed->hook_abort_ = reinterpret_cast<void(*)()>(const_cast<void*>(options[i].second)); 614 } else if (option == "host-prefix") { 615 parsed->host_prefix_ = reinterpret_cast<const char*>(options[i].second); 616 } else if (option == "-Xgenregmap" || option == "-Xgc:precise") { 617 // We silently ignore these for backwards compatibility. 618 } else if (option == "-Xmethod-trace") { 619 parsed->method_trace_ = true; 620 } else if (StartsWith(option, "-Xmethod-trace-file:")) { 621 parsed->method_trace_file_ = option.substr(strlen("-Xmethod-trace-file:")); 622 } else if (StartsWith(option, "-Xmethod-trace-file-size:")) { 623 parsed->method_trace_file_size_ = ParseIntegerOrDie(option); 624 } else if (option == "-Xprofile:threadcpuclock") { 625 Trace::SetDefaultClockSource(kProfilerClockSourceThreadCpu); 626 } else if (option == "-Xprofile:wallclock") { 627 Trace::SetDefaultClockSource(kProfilerClockSourceWall); 628 } else if (option == "-Xprofile:dualclock") { 629 Trace::SetDefaultClockSource(kProfilerClockSourceDual); 630 } else if (option == "-compiler-filter:interpret-only") { 631 parsed->compiler_filter_ = kInterpretOnly; 632 } else if (option == "-compiler-filter:space") { 633 parsed->compiler_filter_ = kSpace; 634 } else if (option == "-compiler-filter:balanced") { 635 parsed->compiler_filter_ = kBalanced; 636 } else if (option == "-compiler-filter:speed") { 637 parsed->compiler_filter_ = kSpeed; 638 } else if (option == "-compiler-filter:everything") { 639 parsed->compiler_filter_ = kEverything; 640 } else if (option == "-sea_ir") { 641 parsed->sea_ir_mode_ = true; 642 } else if (StartsWith(option, "-huge-method-max:")) { 643 parsed->huge_method_threshold_ = ParseIntegerOrDie(option); 644 } else if (StartsWith(option, "-large-method-max:")) { 645 parsed->large_method_threshold_ = ParseIntegerOrDie(option); 646 } else if (StartsWith(option, "-small-method-max:")) { 647 parsed->small_method_threshold_ = ParseIntegerOrDie(option); 648 } else if (StartsWith(option, "-tiny-method-max:")) { 649 parsed->tiny_method_threshold_ = ParseIntegerOrDie(option); 650 } else if (StartsWith(option, "-num-dex-methods-max:")) { 651 parsed->num_dex_methods_threshold_ = ParseIntegerOrDie(option); 652 } else { 653 if (!ignore_unrecognized) { 654 // TODO: print usage via vfprintf 655 LOG(ERROR) << "Unrecognized option " << option; 656 // TODO: this should exit, but for now tolerate unknown options 657 // return NULL; 658 } 659 } 660 } 661 662 // If a reference to the dalvik core.jar snuck in, replace it with 663 // the art specific version. This can happen with on device 664 // boot.art/boot.oat generation by GenerateImage which relies on the 665 // value of BOOTCLASSPATH. 666 std::string core_jar("/core.jar"); 667 size_t core_jar_pos = parsed->boot_class_path_string_.find(core_jar); 668 if (core_jar_pos != std::string::npos) { 669 parsed->boot_class_path_string_.replace(core_jar_pos, core_jar.size(), "/core-libart.jar"); 670 } 671 672 if (!parsed->is_compiler_ && parsed->image_.empty()) { 673 parsed->image_ += GetAndroidRoot(); 674 parsed->image_ += "/framework/boot.art"; 675 } 676 if (parsed->heap_growth_limit_ == 0) { 677 parsed->heap_growth_limit_ = parsed->heap_maximum_size_; 678 } 679 680 return parsed.release(); 681} 682 683bool Runtime::Create(const Options& options, bool ignore_unrecognized) { 684 // TODO: acquire a static mutex on Runtime to avoid racing. 685 if (Runtime::instance_ != NULL) { 686 return false; 687 } 688 InitLogging(NULL); // Calls Locks::Init() as a side effect. 689 instance_ = new Runtime; 690 if (!instance_->Init(options, ignore_unrecognized)) { 691 delete instance_; 692 instance_ = NULL; 693 return false; 694 } 695 return true; 696} 697 698jobject CreateSystemClassLoader() { 699 if (Runtime::Current()->UseCompileTimeClassPath()) { 700 return NULL; 701 } 702 703 ScopedObjectAccess soa(Thread::Current()); 704 ClassLinker* cl = Runtime::Current()->GetClassLinker(); 705 706 SirtRef<mirror::Class> class_loader_class( 707 soa.Self(), soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)); 708 CHECK(cl->EnsureInitialized(class_loader_class, true, true)); 709 710 mirror::ArtMethod* getSystemClassLoader = 711 class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;"); 712 CHECK(getSystemClassLoader != NULL); 713 714 JValue result; 715 ArgArray arg_array(nullptr, 0); 716 InvokeWithArgArray(soa, getSystemClassLoader, &arg_array, &result, 'L'); 717 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), 718 down_cast<mirror::ClassLoader*>(result.GetL())); 719 CHECK(class_loader.get() != nullptr); 720 JNIEnv* env = soa.Self()->GetJniEnv(); 721 ScopedLocalRef<jobject> system_class_loader(env, 722 soa.AddLocalReference<jobject>(class_loader.get())); 723 CHECK(system_class_loader.get() != nullptr); 724 725 soa.Self()->SetClassLoaderOverride(class_loader.get()); 726 727 SirtRef<mirror::Class> thread_class(soa.Self(), 728 soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)); 729 CHECK(cl->EnsureInitialized(thread_class, true, true)); 730 731 mirror::ArtField* contextClassLoader = 732 thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;"); 733 CHECK(contextClassLoader != NULL); 734 735 contextClassLoader->SetObject(soa.Self()->GetPeer(), class_loader.get()); 736 737 return env->NewGlobalRef(system_class_loader.get()); 738} 739 740bool Runtime::Start() { 741 VLOG(startup) << "Runtime::Start entering"; 742 743 CHECK(host_prefix_.empty()) << host_prefix_; 744 745 // Restore main thread state to kNative as expected by native code. 746 Thread* self = Thread::Current(); 747 self->TransitionFromRunnableToSuspended(kNative); 748 749 started_ = true; 750 751 // InitNativeMethods needs to be after started_ so that the classes 752 // it touches will have methods linked to the oat file if necessary. 753 InitNativeMethods(); 754 755 // Initialize well known thread group values that may be accessed threads while attaching. 756 InitThreadGroups(self); 757 758 Thread::FinishStartup(); 759 760 if (is_zygote_) { 761 if (!InitZygote()) { 762 return false; 763 } 764 } else { 765 DidForkFromZygote(); 766 } 767 768 StartDaemonThreads(); 769 770 system_class_loader_ = CreateSystemClassLoader(); 771 772 self->GetJniEnv()->locals.AssertEmpty(); 773 774 VLOG(startup) << "Runtime::Start exiting"; 775 776 finished_starting_ = true; 777 778 return true; 779} 780 781void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 782 DCHECK_GT(threads_being_born_, 0U); 783 threads_being_born_--; 784 if (shutting_down_started_ && threads_being_born_ == 0) { 785 shutdown_cond_->Broadcast(Thread::Current()); 786 } 787} 788 789// Do zygote-mode-only initialization. 790bool Runtime::InitZygote() { 791 // zygote goes into its own process group 792 setpgid(0, 0); 793 794 // See storage config details at http://source.android.com/tech/storage/ 795 // Create private mount namespace shared by all children 796 if (unshare(CLONE_NEWNS) == -1) { 797 PLOG(WARNING) << "Failed to unshare()"; 798 return false; 799 } 800 801 // Mark rootfs as being a slave so that changes from default 802 // namespace only flow into our children. 803 if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) { 804 PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE"; 805 return false; 806 } 807 808 // Create a staging tmpfs that is shared by our children; they will 809 // bind mount storage into their respective private namespaces, which 810 // are isolated from each other. 811 const char* target_base = getenv("EMULATED_STORAGE_TARGET"); 812 if (target_base != NULL) { 813 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV, 814 "uid=0,gid=1028,mode=0751") == -1) { 815 LOG(WARNING) << "Failed to mount tmpfs to " << target_base; 816 return false; 817 } 818 } 819 820 return true; 821} 822 823void Runtime::DidForkFromZygote() { 824 is_zygote_ = false; 825 826 // Create the thread pool. 827 heap_->CreateThreadPool(); 828 829 StartSignalCatcher(); 830 831 // Start the JDWP thread. If the command-line debugger flags specified "suspend=y", 832 // this will pause the runtime, so we probably want this to come last. 833 Dbg::StartJdwp(); 834} 835 836void Runtime::StartSignalCatcher() { 837 if (!is_zygote_) { 838 signal_catcher_ = new SignalCatcher(stack_trace_file_); 839 } 840} 841 842bool Runtime::IsShuttingDown(Thread* self) { 843 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 844 return IsShuttingDownLocked(); 845} 846 847void Runtime::StartDaemonThreads() { 848 VLOG(startup) << "Runtime::StartDaemonThreads entering"; 849 850 Thread* self = Thread::Current(); 851 852 // Must be in the kNative state for calling native methods. 853 CHECK_EQ(self->GetState(), kNative); 854 855 JNIEnv* env = self->GetJniEnv(); 856 env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 857 WellKnownClasses::java_lang_Daemons_start); 858 if (env->ExceptionCheck()) { 859 env->ExceptionDescribe(); 860 LOG(FATAL) << "Error starting java.lang.Daemons"; 861 } 862 863 VLOG(startup) << "Runtime::StartDaemonThreads exiting"; 864} 865 866bool Runtime::Init(const Options& raw_options, bool ignore_unrecognized) { 867 CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); 868 869 UniquePtr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized)); 870 if (options.get() == NULL) { 871 LOG(ERROR) << "Failed to parse options"; 872 return false; 873 } 874 VLOG(startup) << "Runtime::Init -verbose:startup enabled"; 875 876 QuasiAtomic::Startup(); 877 878 Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_); 879 880 host_prefix_ = options->host_prefix_; 881 boot_class_path_string_ = options->boot_class_path_string_; 882 class_path_string_ = options->class_path_string_; 883 properties_ = options->properties_; 884 885 is_compiler_ = options->is_compiler_; 886 is_zygote_ = options->is_zygote_; 887 is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_; 888 889 compiler_filter_ = options->compiler_filter_; 890 huge_method_threshold_ = options->huge_method_threshold_; 891 large_method_threshold_ = options->large_method_threshold_; 892 small_method_threshold_ = options->small_method_threshold_; 893 tiny_method_threshold_ = options->tiny_method_threshold_; 894 num_dex_methods_threshold_ = options->num_dex_methods_threshold_; 895 896 sea_ir_mode_ = options->sea_ir_mode_; 897 vfprintf_ = options->hook_vfprintf_; 898 exit_ = options->hook_exit_; 899 abort_ = options->hook_abort_; 900 901 default_stack_size_ = options->stack_size_; 902 stack_trace_file_ = options->stack_trace_file_; 903 904 max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_; 905 906 monitor_list_ = new MonitorList; 907 thread_list_ = new ThreadList; 908 intern_table_ = new InternTable; 909 910 911 if (options->interpreter_only_) { 912 GetInstrumentation()->ForceInterpretOnly(); 913 } 914 915 heap_ = new gc::Heap(options->heap_initial_size_, 916 options->heap_growth_limit_, 917 options->heap_min_free_, 918 options->heap_max_free_, 919 options->heap_target_utilization_, 920 options->heap_maximum_size_, 921 options->image_, 922 options->collector_type_, 923 options->parallel_gc_threads_, 924 options->conc_gc_threads_, 925 options->low_memory_mode_, 926 options->long_pause_log_threshold_, 927 options->long_gc_log_threshold_, 928 options->ignore_max_footprint_); 929 930 dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_; 931 932 BlockSignals(); 933 InitPlatformSignalHandlers(); 934 935 java_vm_ = new JavaVMExt(this, options.get()); 936 937 Thread::Startup(); 938 939 // ClassLinker needs an attached thread, but we can't fully attach a thread without creating 940 // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main 941 // thread, we do not get a java peer. 942 Thread* self = Thread::Attach("main", false, NULL, false); 943 CHECK_EQ(self->thin_lock_thread_id_, ThreadList::kMainThreadId); 944 CHECK(self != NULL); 945 946 // Set us to runnable so tools using a runtime can allocate and GC by default 947 self->TransitionFromSuspendedToRunnable(); 948 949 // Now we're attached, we can take the heap locks and validate the heap. 950 GetHeap()->EnableObjectValidation(); 951 952 CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U); 953 class_linker_ = new ClassLinker(intern_table_); 954 if (GetHeap()->HasImageSpace()) { 955 class_linker_->InitFromImage(); 956 } else { 957 CHECK(options->boot_class_path_ != NULL); 958 CHECK_NE(options->boot_class_path_->size(), 0U); 959 class_linker_->InitFromCompiler(*options->boot_class_path_); 960 } 961 CHECK(class_linker_ != NULL); 962 verifier::MethodVerifier::Init(); 963 964 method_trace_ = options->method_trace_; 965 method_trace_file_ = options->method_trace_file_; 966 method_trace_file_size_ = options->method_trace_file_size_; 967 968 if (options->method_trace_) { 969 Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0, 970 false, false, 0); 971 } 972 973 // Pre-allocate an OutOfMemoryError for the double-OOME case. 974 self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;", 975 "OutOfMemoryError thrown while trying to throw OutOfMemoryError; no stack available"); 976 pre_allocated_OutOfMemoryError_ = self->GetException(NULL); 977 self->ClearException(); 978 979 VLOG(startup) << "Runtime::Init exiting"; 980 return true; 981} 982 983void Runtime::InitNativeMethods() { 984 VLOG(startup) << "Runtime::InitNativeMethods entering"; 985 Thread* self = Thread::Current(); 986 JNIEnv* env = self->GetJniEnv(); 987 988 // Must be in the kNative state for calling native methods (JNI_OnLoad code). 989 CHECK_EQ(self->GetState(), kNative); 990 991 // First set up JniConstants, which is used by both the runtime's built-in native 992 // methods and libcore. 993 JniConstants::init(env); 994 WellKnownClasses::Init(env); 995 996 // Then set up the native methods provided by the runtime itself. 997 RegisterRuntimeNativeMethods(env); 998 999 // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad. 1000 // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's 1001 // the library that implements System.loadLibrary! 1002 { 1003 std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore")); 1004 std::string reason; 1005 self->TransitionFromSuspendedToRunnable(); 1006 if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, NULL, &reason)) { 1007 LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason; 1008 } 1009 self->TransitionFromRunnableToSuspended(kNative); 1010 } 1011 1012 // Initialize well known classes that may invoke runtime native methods. 1013 WellKnownClasses::LateInit(env); 1014 1015 VLOG(startup) << "Runtime::InitNativeMethods exiting"; 1016} 1017 1018void Runtime::InitThreadGroups(Thread* self) { 1019 JNIEnvExt* env = self->GetJniEnv(); 1020 ScopedJniEnvLocalRefState env_state(env); 1021 main_thread_group_ = 1022 env->NewGlobalRef(env->GetStaticObjectField(WellKnownClasses::java_lang_ThreadGroup, 1023 WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup)); 1024 CHECK(main_thread_group_ != NULL || IsCompiler()); 1025 system_thread_group_ = 1026 env->NewGlobalRef(env->GetStaticObjectField(WellKnownClasses::java_lang_ThreadGroup, 1027 WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); 1028 CHECK(system_thread_group_ != NULL || IsCompiler()); 1029} 1030 1031jobject Runtime::GetMainThreadGroup() const { 1032 CHECK(main_thread_group_ != NULL || IsCompiler()); 1033 return main_thread_group_; 1034} 1035 1036jobject Runtime::GetSystemThreadGroup() const { 1037 CHECK(system_thread_group_ != NULL || IsCompiler()); 1038 return system_thread_group_; 1039} 1040 1041jobject Runtime::GetSystemClassLoader() const { 1042 CHECK(system_class_loader_ != NULL || IsCompiler()); 1043 return system_class_loader_; 1044} 1045 1046void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { 1047#define REGISTER(FN) extern void FN(JNIEnv*); FN(env) 1048 // Register Throwable first so that registration of other native methods can throw exceptions 1049 REGISTER(register_java_lang_Throwable); 1050 REGISTER(register_dalvik_system_DexFile); 1051 REGISTER(register_dalvik_system_VMDebug); 1052 REGISTER(register_dalvik_system_VMRuntime); 1053 REGISTER(register_dalvik_system_VMStack); 1054 REGISTER(register_dalvik_system_Zygote); 1055 REGISTER(register_java_lang_Class); 1056 REGISTER(register_java_lang_DexCache); 1057 REGISTER(register_java_lang_Object); 1058 REGISTER(register_java_lang_Runtime); 1059 REGISTER(register_java_lang_String); 1060 REGISTER(register_java_lang_System); 1061 REGISTER(register_java_lang_Thread); 1062 REGISTER(register_java_lang_VMClassLoader); 1063 REGISTER(register_java_lang_reflect_Array); 1064 REGISTER(register_java_lang_reflect_Constructor); 1065 REGISTER(register_java_lang_reflect_Field); 1066 REGISTER(register_java_lang_reflect_Method); 1067 REGISTER(register_java_lang_reflect_Proxy); 1068 REGISTER(register_java_util_concurrent_atomic_AtomicLong); 1069 REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer); 1070 REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal); 1071 REGISTER(register_sun_misc_Unsafe); 1072#undef REGISTER 1073} 1074 1075void Runtime::DumpForSigQuit(std::ostream& os) { 1076 GetClassLinker()->DumpForSigQuit(os); 1077 GetInternTable()->DumpForSigQuit(os); 1078 GetJavaVM()->DumpForSigQuit(os); 1079 GetHeap()->DumpForSigQuit(os); 1080 os << "\n"; 1081 1082 thread_list_->DumpForSigQuit(os); 1083 BaseMutex::DumpAll(os); 1084} 1085 1086void Runtime::DumpLockHolders(std::ostream& os) { 1087 uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid(); 1088 pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner(); 1089 pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner(); 1090 pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner(); 1091 if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) { 1092 os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n" 1093 << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n" 1094 << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n" 1095 << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n"; 1096 } 1097} 1098 1099void Runtime::SetStatsEnabled(bool new_state) { 1100 if (new_state == true) { 1101 GetStats()->Clear(~0); 1102 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1103 Thread::Current()->GetStats()->Clear(~0); 1104 GetInstrumentation()->InstrumentQuickAllocEntryPoints(); 1105 } else { 1106 GetInstrumentation()->UninstrumentQuickAllocEntryPoints(); 1107 } 1108 stats_enabled_ = new_state; 1109} 1110 1111void Runtime::ResetStats(int kinds) { 1112 GetStats()->Clear(kinds & 0xffff); 1113 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1114 Thread::Current()->GetStats()->Clear(kinds >> 16); 1115} 1116 1117int32_t Runtime::GetStat(int kind) { 1118 RuntimeStats* stats; 1119 if (kind < (1<<16)) { 1120 stats = GetStats(); 1121 } else { 1122 stats = Thread::Current()->GetStats(); 1123 kind >>= 16; 1124 } 1125 switch (kind) { 1126 case KIND_ALLOCATED_OBJECTS: 1127 return stats->allocated_objects; 1128 case KIND_ALLOCATED_BYTES: 1129 return stats->allocated_bytes; 1130 case KIND_FREED_OBJECTS: 1131 return stats->freed_objects; 1132 case KIND_FREED_BYTES: 1133 return stats->freed_bytes; 1134 case KIND_GC_INVOCATIONS: 1135 return stats->gc_for_alloc_count; 1136 case KIND_CLASS_INIT_COUNT: 1137 return stats->class_init_count; 1138 case KIND_CLASS_INIT_TIME: 1139 // Convert ns to us, reduce to 32 bits. 1140 return static_cast<int>(stats->class_init_time_ns / 1000); 1141 case KIND_EXT_ALLOCATED_OBJECTS: 1142 case KIND_EXT_ALLOCATED_BYTES: 1143 case KIND_EXT_FREED_OBJECTS: 1144 case KIND_EXT_FREED_BYTES: 1145 return 0; // backward compatibility 1146 default: 1147 LOG(FATAL) << "Unknown statistic " << kind; 1148 return -1; // unreachable 1149 } 1150} 1151 1152void Runtime::BlockSignals() { 1153 SignalSet signals; 1154 signals.Add(SIGPIPE); 1155 // SIGQUIT is used to dump the runtime's state (including stack traces). 1156 signals.Add(SIGQUIT); 1157 // SIGUSR1 is used to initiate a GC. 1158 signals.Add(SIGUSR1); 1159 signals.Block(); 1160} 1161 1162bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 1163 bool create_peer) { 1164 bool success = Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL; 1165 if (thread_name == NULL) { 1166 LOG(WARNING) << *Thread::Current() << " attached without supplying a name"; 1167 } 1168 return success; 1169} 1170 1171void Runtime::DetachCurrentThread() { 1172 Thread* self = Thread::Current(); 1173 if (self == NULL) { 1174 LOG(FATAL) << "attempting to detach thread that is not attached"; 1175 } 1176 if (self->HasManagedStack()) { 1177 LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code"; 1178 } 1179 thread_list_->Unregister(self); 1180} 1181 1182 mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() const { 1183 if (pre_allocated_OutOfMemoryError_ == NULL) { 1184 LOG(ERROR) << "Failed to return pre-allocated OOME"; 1185 } 1186 return pre_allocated_OutOfMemoryError_; 1187} 1188 1189void Runtime::VisitConcurrentRoots(RootVisitor* visitor, void* arg, bool only_dirty, 1190 bool clean_dirty) { 1191 intern_table_->VisitRoots(visitor, arg, only_dirty, clean_dirty); 1192 class_linker_->VisitRoots(visitor, arg, only_dirty, clean_dirty); 1193} 1194 1195void Runtime::VisitNonThreadRoots(RootVisitor* visitor, void* arg) { 1196 // Visit the classes held as static in mirror classes. 1197 mirror::ArtField::VisitRoots(visitor, arg); 1198 mirror::ArtMethod::VisitRoots(visitor, arg); 1199 mirror::Class::VisitRoots(visitor, arg); 1200 mirror::StackTraceElement::VisitRoots(visitor, arg); 1201 mirror::String::VisitRoots(visitor, arg); 1202 mirror::Throwable::VisitRoots(visitor, arg); 1203 // Visit all the primitive array types classes. 1204 mirror::PrimitiveArray<uint8_t>::VisitRoots(visitor, arg); // BooleanArray 1205 mirror::PrimitiveArray<int8_t>::VisitRoots(visitor, arg); // ByteArray 1206 mirror::PrimitiveArray<uint16_t>::VisitRoots(visitor, arg); // CharArray 1207 mirror::PrimitiveArray<double>::VisitRoots(visitor, arg); // DoubleArray 1208 mirror::PrimitiveArray<float>::VisitRoots(visitor, arg); // FloatArray 1209 mirror::PrimitiveArray<int32_t>::VisitRoots(visitor, arg); // IntArray 1210 mirror::PrimitiveArray<int64_t>::VisitRoots(visitor, arg); // LongArray 1211 mirror::PrimitiveArray<int16_t>::VisitRoots(visitor, arg); // ShortArray 1212 java_vm_->VisitRoots(visitor, arg); 1213 if (pre_allocated_OutOfMemoryError_ != nullptr) { 1214 pre_allocated_OutOfMemoryError_ = down_cast<mirror::Throwable*>( 1215 visitor(pre_allocated_OutOfMemoryError_, arg)); 1216 DCHECK(pre_allocated_OutOfMemoryError_ != nullptr); 1217 } 1218 resolution_method_ = down_cast<mirror::ArtMethod*>(visitor(resolution_method_, arg)); 1219 DCHECK(resolution_method_ != nullptr); 1220 if (HasImtConflictMethod()) { 1221 imt_conflict_method_ = down_cast<mirror::ArtMethod*>(visitor(imt_conflict_method_, arg)); 1222 } 1223 if (HasDefaultImt()) { 1224 default_imt_ = down_cast<mirror::ObjectArray<mirror::ArtMethod>*>(visitor(default_imt_, arg)); 1225 } 1226 1227 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 1228 if (callee_save_methods_[i] != nullptr) { 1229 callee_save_methods_[i] = down_cast<mirror::ArtMethod*>( 1230 visitor(callee_save_methods_[i], arg)); 1231 } 1232 } 1233 { 1234 MutexLock mu(Thread::Current(), method_verifiers_lock_); 1235 for (verifier::MethodVerifier* verifier : method_verifiers_) { 1236 verifier->VisitRoots(visitor, arg); 1237 } 1238 } 1239} 1240 1241void Runtime::VisitNonConcurrentRoots(RootVisitor* visitor, void* arg) { 1242 thread_list_->VisitRoots(visitor, arg); 1243 VisitNonThreadRoots(visitor, arg); 1244} 1245 1246void Runtime::VisitRoots(RootVisitor* visitor, void* arg, bool only_dirty, bool clean_dirty) { 1247 VisitConcurrentRoots(visitor, arg, only_dirty, clean_dirty); 1248 VisitNonConcurrentRoots(visitor, arg); 1249} 1250 1251mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) { 1252 Thread* self = Thread::Current(); 1253 SirtRef<mirror::ObjectArray<mirror::ArtMethod> > imtable(self, cl->AllocArtMethodArray(self, 64)); 1254 mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod(); 1255 for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) { 1256 imtable->Set(i, imt_conflict_method); 1257 } 1258 return imtable.get(); 1259} 1260 1261mirror::ArtMethod* Runtime::CreateImtConflictMethod() { 1262 Thread* self = Thread::Current(); 1263 Runtime* r = Runtime::Current(); 1264 ClassLinker* cl = r->GetClassLinker(); 1265 SirtRef<mirror::ArtMethod> method(self, cl->AllocArtMethod(self)); 1266 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1267 // TODO: use a special method for imt conflict method saves 1268 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1269 // When compiling, the code pointer will get set later when the image is loaded. 1270 method->SetEntryPointFromCompiledCode(r->IsCompiler() ? NULL : GetImtConflictTrampoline(cl)); 1271 return method.get(); 1272} 1273 1274mirror::ArtMethod* Runtime::CreateResolutionMethod() { 1275 Thread* self = Thread::Current(); 1276 Runtime* r = Runtime::Current(); 1277 ClassLinker* cl = r->GetClassLinker(); 1278 SirtRef<mirror::ArtMethod> method(self, cl->AllocArtMethod(self)); 1279 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1280 // TODO: use a special method for resolution method saves 1281 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1282 // When compiling, the code pointer will get set later when the image is loaded. 1283 method->SetEntryPointFromCompiledCode(r->IsCompiler() ? NULL : GetResolutionTrampoline(cl)); 1284 return method.get(); 1285} 1286 1287mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(InstructionSet instruction_set, 1288 CalleeSaveType type) { 1289 Thread* self = Thread::Current(); 1290 Runtime* r = Runtime::Current(); 1291 ClassLinker* cl = r->GetClassLinker(); 1292 SirtRef<mirror::ArtMethod> method(self, cl->AllocArtMethod(self)); 1293 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1294 // TODO: use a special method for callee saves 1295 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1296 method->SetEntryPointFromCompiledCode(NULL); 1297 if ((instruction_set == kThumb2) || (instruction_set == kArm)) { 1298 uint32_t ref_spills = (1 << art::arm::R5) | (1 << art::arm::R6) | (1 << art::arm::R7) | 1299 (1 << art::arm::R8) | (1 << art::arm::R10) | (1 << art::arm::R11); 1300 uint32_t arg_spills = (1 << art::arm::R1) | (1 << art::arm::R2) | (1 << art::arm::R3); 1301 uint32_t all_spills = (1 << art::arm::R4) | (1 << art::arm::R9); 1302 uint32_t core_spills = ref_spills | (type == kRefsAndArgs ? arg_spills : 0) | 1303 (type == kSaveAll ? all_spills : 0) | (1 << art::arm::LR); 1304 uint32_t fp_all_spills = (1 << art::arm::S0) | (1 << art::arm::S1) | (1 << art::arm::S2) | 1305 (1 << art::arm::S3) | (1 << art::arm::S4) | (1 << art::arm::S5) | 1306 (1 << art::arm::S6) | (1 << art::arm::S7) | (1 << art::arm::S8) | 1307 (1 << art::arm::S9) | (1 << art::arm::S10) | (1 << art::arm::S11) | 1308 (1 << art::arm::S12) | (1 << art::arm::S13) | (1 << art::arm::S14) | 1309 (1 << art::arm::S15) | (1 << art::arm::S16) | (1 << art::arm::S17) | 1310 (1 << art::arm::S18) | (1 << art::arm::S19) | (1 << art::arm::S20) | 1311 (1 << art::arm::S21) | (1 << art::arm::S22) | (1 << art::arm::S23) | 1312 (1 << art::arm::S24) | (1 << art::arm::S25) | (1 << art::arm::S26) | 1313 (1 << art::arm::S27) | (1 << art::arm::S28) | (1 << art::arm::S29) | 1314 (1 << art::arm::S30) | (1 << art::arm::S31); 1315 uint32_t fp_spills = type == kSaveAll ? fp_all_spills : 0; 1316 size_t frame_size = RoundUp((__builtin_popcount(core_spills) /* gprs */ + 1317 __builtin_popcount(fp_spills) /* fprs */ + 1318 1 /* Method* */) * kPointerSize, kStackAlignment); 1319 method->SetFrameSizeInBytes(frame_size); 1320 method->SetCoreSpillMask(core_spills); 1321 method->SetFpSpillMask(fp_spills); 1322 } else if (instruction_set == kMips) { 1323 uint32_t ref_spills = (1 << art::mips::S2) | (1 << art::mips::S3) | (1 << art::mips::S4) | 1324 (1 << art::mips::S5) | (1 << art::mips::S6) | (1 << art::mips::S7) | 1325 (1 << art::mips::GP) | (1 << art::mips::FP); 1326 uint32_t arg_spills = (1 << art::mips::A1) | (1 << art::mips::A2) | (1 << art::mips::A3); 1327 uint32_t all_spills = (1 << art::mips::S0) | (1 << art::mips::S1); 1328 uint32_t core_spills = ref_spills | (type == kRefsAndArgs ? arg_spills : 0) | 1329 (type == kSaveAll ? all_spills : 0) | (1 << art::mips::RA); 1330 size_t frame_size = RoundUp((__builtin_popcount(core_spills) /* gprs */ + 1331 (type == kRefsAndArgs ? 0 : 3) + 1 /* Method* */) * 1332 kPointerSize, kStackAlignment); 1333 method->SetFrameSizeInBytes(frame_size); 1334 method->SetCoreSpillMask(core_spills); 1335 method->SetFpSpillMask(0); 1336 } else if (instruction_set == kX86) { 1337 uint32_t ref_spills = (1 << art::x86::EBP) | (1 << art::x86::ESI) | (1 << art::x86::EDI); 1338 uint32_t arg_spills = (1 << art::x86::ECX) | (1 << art::x86::EDX) | (1 << art::x86::EBX); 1339 uint32_t core_spills = ref_spills | (type == kRefsAndArgs ? arg_spills : 0) | 1340 (1 << art::x86::kNumberOfCpuRegisters); // fake return address callee save 1341 size_t frame_size = RoundUp((__builtin_popcount(core_spills) /* gprs */ + 1342 1 /* Method* */) * kPointerSize, kStackAlignment); 1343 method->SetFrameSizeInBytes(frame_size); 1344 method->SetCoreSpillMask(core_spills); 1345 method->SetFpSpillMask(0); 1346 } else { 1347 UNIMPLEMENTED(FATAL); 1348 } 1349 return method.get(); 1350} 1351 1352void Runtime::DisallowNewSystemWeaks() { 1353 monitor_list_->DisallowNewMonitors(); 1354 intern_table_->DisallowNewInterns(); 1355 java_vm_->DisallowNewWeakGlobals(); 1356} 1357 1358void Runtime::AllowNewSystemWeaks() { 1359 monitor_list_->AllowNewMonitors(); 1360 intern_table_->AllowNewInterns(); 1361 java_vm_->AllowNewWeakGlobals(); 1362} 1363 1364void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) { 1365 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType)); 1366 callee_save_methods_[type] = method; 1367} 1368 1369const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) { 1370 if (class_loader == NULL) { 1371 return GetClassLinker()->GetBootClassPath(); 1372 } 1373 CHECK(UseCompileTimeClassPath()); 1374 CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader); 1375 CHECK(it != compile_time_class_paths_.end()); 1376 return it->second; 1377} 1378 1379void Runtime::SetCompileTimeClassPath(jobject class_loader, std::vector<const DexFile*>& class_path) { 1380 CHECK(!IsStarted()); 1381 use_compile_time_class_path_ = true; 1382 compile_time_class_paths_.Put(class_loader, class_path); 1383} 1384 1385void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) { 1386 DCHECK(verifier != nullptr); 1387 MutexLock mu(Thread::Current(), method_verifiers_lock_); 1388 method_verifiers_.insert(verifier); 1389} 1390 1391void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) { 1392 DCHECK(verifier != nullptr); 1393 MutexLock mu(Thread::Current(), method_verifiers_lock_); 1394 auto it = method_verifiers_.find(verifier); 1395 CHECK(it != method_verifiers_.end()); 1396 method_verifiers_.erase(it); 1397} 1398 1399} // namespace art 1400