runtime.cc revision 2692b573a56cd63a3c8c8aa1636e3766b6d8c9c4 
1// Copyright 2011 Google Inc. All Rights Reserved.
2
3#include "runtime.h"
4
5#include <signal.h>
6
7#include <cstdio>
8#include <cstdlib>
9#include <limits>
10#include <vector>
11
12#include "class_linker.h"
13#include "class_loader.h"
14#include "debugger.h"
15#include "heap.h"
16#include "image.h"
17#include "intern_table.h"
18#include "jni_internal.h"
19#include "monitor.h"
20#include "oat_file.h"
21#include "ScopedLocalRef.h"
22#include "signal_catcher.h"
23#include "space.h"
24#include "thread.h"
25#include "thread_list.h"
26#include "UniquePtr.h"
27
28// TODO: this drags in cutil/log.h, which conflicts with our logging.h.
29#include "JniConstants.h"
30
31namespace art {
32
33Runtime* Runtime::instance_ = NULL;
34
35Runtime::Runtime()
36    : is_zygote_(false),
37      default_stack_size_(Thread::kDefaultStackSize),
38      monitor_list_(NULL),
39      thread_list_(NULL),
40      intern_table_(NULL),
41      class_linker_(NULL),
42      signal_catcher_(NULL),
43      java_vm_(NULL),
44      jni_stub_array_(NULL),
45      abstract_method_error_stub_array_(NULL),
46      started_(false),
47      vfprintf_(NULL),
48      exit_(NULL),
49      abort_(NULL),
50      stats_enabled_(false),
51      tracer_(NULL) {
52  for (int i = 0; i < Runtime::kLastTrampolineMethodType; i++) {
53    resolution_stub_array_[i] = NULL;
54  }
55  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
56    callee_save_method_[i] = NULL;
57  }
58}
59
60Runtime::~Runtime() {
61  Dbg::StopJdwp();
62
63  // Make sure our internal threads are dead before we start tearing down things they're using.
64  delete signal_catcher_;
65  // TODO: GC thread.
66
67  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
68  delete thread_list_;
69  delete monitor_list_;
70
71  delete class_linker_;
72  Heap::Destroy();
73  delete intern_table_;
74  delete java_vm_;
75  Thread::Shutdown();
76  // TODO: acquire a static mutex on Runtime to avoid racing.
77  CHECK(instance_ == NULL || instance_ == this);
78  instance_ = NULL;
79}
80
81static bool gAborting = false;
82
83struct AbortState {
84  void Dump(std::ostream& os) {
85    if (gAborting) {
86      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
87      return;
88    }
89    gAborting = true;
90    os << "Runtime aborting...\n";
91    Thread* self = Thread::Current();
92    if (self == NULL) {
93      os << "(Aborting thread was not attached to runtime!)\n";
94    } else {
95      self->Dump(os, true);
96    }
97  }
98};
99
100void Runtime::Abort(const char* file, int line) {
101  // Get any pending output out of the way.
102  fflush(NULL);
103
104  // Many people have difficulty distinguish aborts from crashes,
105  // so be explicit.
106  AbortState state;
107  LOG(ERROR) << Dumpable<AbortState>(state);
108
109  // Perform any platform-specific pre-abort actions.
110  PlatformAbort(file, line);
111
112  // use abort hook if we have one
113  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
114    Runtime::Current()->abort_();
115    // notreached
116  }
117
118  // If we call abort(3) on a device, all threads in the process
119  // receive SIGABRT.  debuggerd dumps the stack trace of the main
120  // thread, whether or not that was the thread that failed.  By
121  // stuffing a value into a bogus address, we cause a segmentation
122  // fault in the current thread, and get a useful log from debuggerd.
123  // We can also trivially tell the difference between a VM crash and
124  // a deliberate abort by looking at the fault address.
125  *reinterpret_cast<char*>(0xdeadd00d) = 38;
126  abort();
127  // notreached
128}
129
130void Runtime::CallExitHook(jint status) {
131  if (exit_ != NULL) {
132    ScopedThreadStateChange tsc(Thread::Current(), Thread::kNative);
133    exit_(status);
134    LOG(WARNING) << "Exit hook returned instead of exiting!";
135  }
136}
137
138// Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify
139// memory sizes.  [kK] indicates kilobytes, [mM] megabytes, and
140// [gG] gigabytes.
141//
142// "s" should point just past the "-Xm?" part of the string.
143// "div" specifies a divisor, e.g. 1024 if the value must be a multiple
144// of 1024.
145//
146// The spec says the -Xmx and -Xms options must be multiples of 1024.  It
147// doesn't say anything about -Xss.
148//
149// Returns 0 (a useless size) if "s" is malformed or specifies a low or
150// non-evenly-divisible value.
151//
152size_t ParseMemoryOption(const char* s, size_t div) {
153  // strtoul accepts a leading [+-], which we don't want,
154  // so make sure our string starts with a decimal digit.
155  if (isdigit(*s)) {
156    const char* s2;
157    size_t val = strtoul(s, (char**)&s2, 10);
158    if (s2 != s) {
159      // s2 should be pointing just after the number.
160      // If this is the end of the string, the user
161      // has specified a number of bytes.  Otherwise,
162      // there should be exactly one more character
163      // that specifies a multiplier.
164      if (*s2 != '\0') {
165        // The remainder of the string is either a single multiplier
166        // character, or nothing to indicate that the value is in
167        // bytes.
168        char c = *s2++;
169        if (*s2 == '\0') {
170          size_t mul;
171          if (c == '\0') {
172            mul = 1;
173          } else if (c == 'k' || c == 'K') {
174            mul = KB;
175          } else if (c == 'm' || c == 'M') {
176            mul = MB;
177          } else if (c == 'g' || c == 'G') {
178            mul = GB;
179          } else {
180            // Unknown multiplier character.
181            return 0;
182          }
183
184          if (val <= std::numeric_limits<size_t>::max() / mul) {
185            val *= mul;
186          } else {
187            // Clamp to a multiple of 1024.
188            val = std::numeric_limits<size_t>::max() & ~(1024-1);
189          }
190        } else {
191          // There's more than one character after the numeric part.
192          return 0;
193        }
194      }
195      // The man page says that a -Xm value must be a multiple of 1024.
196      if (val % div == 0) {
197        return val;
198      }
199    }
200  }
201  return 0;
202}
203
204size_t ParseIntegerOrDie(const StringPiece& s) {
205  StringPiece::size_type colon = s.find(':');
206  if (colon == StringPiece::npos) {
207    LOG(FATAL) << "Missing integer: " << s;
208  }
209  const char* begin = &s.data()[colon + 1];
210  char* end;
211  size_t result = strtoul(begin, &end, 10);
212  if (begin == end || *end != '\0') {
213    LOG(FATAL) << "Failed to parse integer in: " << s;
214  }
215  return result;
216}
217
218void LoadJniLibrary(JavaVMExt* vm, const char* name) {
219  // TODO: OS_SHARED_LIB_FORMAT_STR
220  std::string mapped_name(StringPrintf("lib%s.so", name));
221  std::string reason;
222  if (!vm->LoadNativeLibrary(mapped_name, NULL, reason)) {
223    LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": "
224               << reason;
225  }
226}
227
228Runtime::ParsedOptions* Runtime::ParsedOptions::Create(const Options& options, bool ignore_unrecognized) {
229  UniquePtr<ParsedOptions> parsed(new ParsedOptions());
230  bool compiler = false;
231  const char* boot_class_path = getenv("BOOTCLASSPATH");
232  if (boot_class_path != NULL) {
233    parsed->boot_class_path_ = getenv("BOOTCLASSPATH");
234  }
235  const char* class_path = getenv("CLASSPATH");
236  if (class_path != NULL) {
237    parsed->class_path_ = getenv("CLASSPATH");
238  }
239#ifdef NDEBUG
240  // -Xcheck:jni is off by default for regular builds...
241  parsed->check_jni_ = false;
242#else
243  // ...but on by default in debug builds.
244  parsed->check_jni_ = true;
245#endif
246
247  parsed->heap_initial_size_ = Heap::kInitialSize;
248  parsed->heap_maximum_size_ = Heap::kMaximumSize;
249  parsed->heap_growth_limit_ = 0;  // 0 means no growth limit
250  parsed->stack_size_ = Thread::kDefaultStackSize;
251
252  parsed->is_zygote_ = false;
253
254  parsed->jni_globals_max_ = 0;
255  parsed->lock_profiling_threshold_ = 0;
256  parsed->hook_is_sensitive_thread_ = NULL;
257
258  parsed->hook_vfprintf_ = vfprintf;
259  parsed->hook_exit_ = exit;
260  parsed->hook_abort_ = abort;
261
262  for (size_t i = 0; i < options.size(); ++i) {
263    const StringPiece& option = options[i].first;
264    if (true && options[0].first == "-Xzygote") {
265      LOG(INFO) << "option[" << i << "]=" << option;
266    }
267    if (option.starts_with("-Xbootclasspath:")) {
268      parsed->boot_class_path_ = option.substr(strlen("-Xbootclasspath:")).data();
269    } else if (option == "-classpath" || option == "-cp") {
270      // TODO: support -Djava.class.path
271      i++;
272      if (i == options.size()) {
273        // TODO: usage
274        LOG(FATAL) << "Missing required class path value for " << option;
275        return NULL;
276      }
277      const StringPiece& value = options[i].first;
278      parsed->class_path_ = value.data();
279    } else if (option.starts_with("-Ximage:")) {
280      parsed->images_.push_back(option.substr(strlen("-Ximage:")).data());
281    } else if (option.starts_with("-Xcheck:jni")) {
282      parsed->check_jni_ = true;
283    } else if (option.starts_with("-Xrunjdwp:") || option.starts_with("-agentlib:jdwp=")) {
284      std::string tail(option.substr(option[1] == 'X' ? 10 : 15).ToString());
285      if (tail == "help" || !Dbg::ParseJdwpOptions(tail)) {
286        LOG(FATAL) << "Example: -Xrunjdwp:transport=dt_socket,address=8000,server=y\n"
287                   << "Example: -Xrunjdwp:transport=dt_socket,address=localhost:6500,server=n";
288        return NULL;
289      }
290    } else if (option.starts_with("-Xms")) {
291      size_t size = ParseMemoryOption(option.substr(strlen("-Xms")).data(), 1024);
292      if (size == 0) {
293        if (ignore_unrecognized) {
294          continue;
295        }
296        // TODO: usage
297        LOG(FATAL) << "Failed to parse " << option;
298        return NULL;
299      }
300      parsed->heap_initial_size_ = size;
301    } else if (option.starts_with("-Xmx")) {
302      size_t size = ParseMemoryOption(option.substr(strlen("-Xmx")).data(), 1024);
303      if (size == 0) {
304        if (ignore_unrecognized) {
305          continue;
306        }
307        // TODO: usage
308        LOG(FATAL) << "Failed to parse " << option;
309        return NULL;
310      }
311      parsed->heap_maximum_size_ = size;
312    } else if (option.starts_with("-XX:HeapGrowthLimit=")) {
313      size_t size = ParseMemoryOption(option.substr(strlen("-XX:HeapGrowthLimit=")).data(), 1024);
314      if (size == 0) {
315        if (ignore_unrecognized) {
316          continue;
317        }
318        // TODO: usage
319        LOG(FATAL) << "Failed to parse " << option;
320        return NULL;
321      }
322      parsed->heap_growth_limit_ = size;
323    } else if (option.starts_with("-Xss")) {
324      size_t size = ParseMemoryOption(option.substr(strlen("-Xss")).data(), 1);
325      if (size == 0) {
326        if (ignore_unrecognized) {
327          continue;
328        }
329        // TODO: usage
330        LOG(FATAL) << "Failed to parse " << option;
331        return NULL;
332      }
333      parsed->stack_size_ = size;
334    } else if (option.starts_with("-D")) {
335      parsed->properties_.push_back(option.substr(strlen("-D")).data());
336    } else if (option.starts_with("-Xjnitrace:")) {
337      parsed->jni_trace_ = option.substr(strlen("-Xjnitrace:")).data();
338    } else if (option == "compiler") {
339      compiler = true;
340    } else if (option == "-Xzygote") {
341      parsed->is_zygote_ = true;
342    } else if (option.starts_with("-verbose:")) {
343      std::vector<std::string> verbose_options;
344      Split(option.substr(strlen("-verbose:")).data(), ',', verbose_options);
345      for (size_t i = 0; i < verbose_options.size(); ++i) {
346        if (verbose_options[i] == "class") {
347          gLogVerbosity.class_linker = true;
348        } else if (verbose_options[i] == "compiler") {
349          gLogVerbosity.compiler = true;
350        } else if (verbose_options[i] == "heap") {
351          gLogVerbosity.heap = true;
352        } else if (verbose_options[i] == "gc") {
353          gLogVerbosity.gc = true;
354        } else if (verbose_options[i] == "jdwp") {
355          gLogVerbosity.jdwp = true;
356        } else if (verbose_options[i] == "jni") {
357          gLogVerbosity.jni = true;
358        } else if (verbose_options[i] == "monitor") {
359          gLogVerbosity.monitor = true;
360        } else if (verbose_options[i] == "startup") {
361          gLogVerbosity.startup = true;
362        } else if (verbose_options[i] == "third-party-jni") {
363          gLogVerbosity.third_party_jni = true;
364        } else if (verbose_options[i] == "threads") {
365          gLogVerbosity.threads = true;
366        } else {
367          LOG(WARNING) << "Ignoring unknown -verbose option: " << verbose_options[i];
368        }
369      }
370    } else if (option.starts_with("-Xjnigreflimit:")) {
371      parsed->jni_globals_max_ = ParseIntegerOrDie(option);
372    } else if (option.starts_with("-Xlockprofthreshold:")) {
373      parsed->lock_profiling_threshold_ = ParseIntegerOrDie(option);
374    } else if (option.starts_with("-Xstacktracefile:")) {
375// always show stack traces in debug builds
376#ifdef NDEBUG
377      parsed->stack_trace_file_ = option.substr(strlen("-Xstacktracefile:")).data();
378#endif
379    } else if (option == "sensitiveThread") {
380      parsed->hook_is_sensitive_thread_ = reinterpret_cast<bool (*)()>(options[i].second);
381    } else if (option == "vfprintf") {
382      parsed->hook_vfprintf_ = reinterpret_cast<int (*)(FILE *, const char*, va_list)>(options[i].second);
383    } else if (option == "exit") {
384      parsed->hook_exit_ = reinterpret_cast<void(*)(jint)>(options[i].second);
385    } else if (option == "abort") {
386      parsed->hook_abort_ = reinterpret_cast<void(*)()>(options[i].second);
387    } else if (option == "host-prefix") {
388      parsed->host_prefix_ = reinterpret_cast<const char*>(options[i].second);
389    } else {
390      if (!ignore_unrecognized) {
391        // TODO: print usage via vfprintf
392        LOG(ERROR) << "Unrecognized option " << option;
393        // TODO: this should exit, but for now tolerate unknown options
394        //return NULL;
395      }
396    }
397  }
398
399  if (!compiler && parsed->images_.empty()) {
400    parsed->images_.push_back("/system/framework/boot.art");
401  }
402  if (parsed->heap_growth_limit_ == 0) {
403    parsed->heap_growth_limit_ = parsed->heap_maximum_size_;
404  }
405
406  LOG(INFO) << "Build type: "
407#ifndef NDEBUG
408            << "debug"
409#else
410            << "optimized"
411#endif
412            << "; CheckJNI: " << (parsed->check_jni_ ? "on" : "off");
413
414  return parsed.release();
415}
416
417Runtime* Runtime::Create(const Options& options, bool ignore_unrecognized) {
418  // TODO: acquire a static mutex on Runtime to avoid racing.
419  if (Runtime::instance_ != NULL) {
420    return NULL;
421  }
422  instance_ = new Runtime;
423  if (!instance_->Init(options, ignore_unrecognized)) {
424    delete instance_;
425    instance_ = NULL;
426  }
427  return instance_;
428}
429
430void CreateSystemClassLoader() {
431  if (ClassLoader::UseCompileTimeClassPath()) {
432    return;
433  }
434
435  Thread* self = Thread::Current();
436
437  // Must be in the kNative state for calling native methods.
438  CHECK_EQ(self->GetState(), Thread::kNative);
439
440  JNIEnv* env = self->GetJniEnv();
441  ScopedLocalRef<jclass> ClassLoader_class(env, env->FindClass("java/lang/ClassLoader"));
442  CHECK(ClassLoader_class.get() != NULL);
443  jmethodID getSystemClassLoader = env->GetStaticMethodID(ClassLoader_class.get(),
444                                                          "getSystemClassLoader",
445                                                          "()Ljava/lang/ClassLoader;");
446  CHECK(getSystemClassLoader != NULL);
447  ScopedLocalRef<jobject> class_loader(env, env->CallStaticObjectMethod(ClassLoader_class.get(),
448                                                                        getSystemClassLoader));
449  CHECK(class_loader.get() != NULL);
450
451  Thread::Current()->SetClassLoaderOverride(Decode<ClassLoader*>(env, class_loader.get()));
452
453  ScopedLocalRef<jclass> Thread_class(env, env->FindClass("java/lang/Thread"));
454  CHECK(Thread_class.get() != NULL);
455  jfieldID contextClassLoader = env->GetFieldID(Thread_class.get(),
456                                                "contextClassLoader",
457                                                "Ljava/lang/ClassLoader;");
458  CHECK(contextClassLoader != NULL);
459  ScopedLocalRef<jobject> self_jobject(env, AddLocalReference<jobject>(env, self->GetPeer()));
460  env->SetObjectField(self_jobject.get(), contextClassLoader, class_loader.get());
461}
462
463void Runtime::Start() {
464  VLOG(startup) << "Runtime::Start entering";
465
466  CHECK(host_prefix_.empty()) << host_prefix_;
467
468  // Restore main thread state to kNative as expected by native code
469  Thread::Current()->SetState(Thread::kNative);
470
471  started_ = true;
472
473  // InitNativeMethods needs to be after started_ so that the classes
474  // it touches will have methods linked to the oat file if necessary.
475  InitNativeMethods();
476
477  Thread::FinishStartup();
478
479  if (!is_zygote_) {
480    DidForkFromZygote();
481  }
482
483  StartDaemonThreads();
484
485  CreateSystemClassLoader();
486
487  Thread::Current()->GetJniEnv()->locals.AssertEmpty();
488
489  VLOG(startup) << "Runtime::Start exiting";
490}
491
492void Runtime::DidForkFromZygote() {
493  is_zygote_ = false;
494
495  StartSignalCatcher();
496
497  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
498  // this will pause the runtime, so we probably want this to come last.
499  Dbg::StartJdwp();
500}
501
502void Runtime::StartSignalCatcher() {
503  if (!is_zygote_) {
504    signal_catcher_ = new SignalCatcher(stack_trace_file_);
505  }
506}
507
508void Runtime::StartDaemonThreads() {
509  VLOG(startup) << "Runtime::StartDaemonThreads entering";
510
511  Thread* self = Thread::Current();
512
513  // Must be in the kNative state for calling native methods.
514  CHECK_EQ(self->GetState(), Thread::kNative);
515
516  JNIEnv* env = self->GetJniEnv();
517  ScopedLocalRef<jclass> c(env, env->FindClass("java/lang/Daemons"));
518  CHECK(c.get() != NULL);
519  jmethodID mid = env->GetStaticMethodID(c.get(), "start", "()V");
520  CHECK(mid != NULL);
521  env->CallStaticVoidMethod(c.get(), mid);
522
523  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
524}
525
526bool Runtime::IsStarted() const {
527  return started_;
528}
529
530bool Runtime::Init(const Options& raw_options, bool ignore_unrecognized) {
531  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
532
533  UniquePtr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
534  if (options.get() == NULL) {
535    LOG(ERROR) << "Failed to parse options";
536    return false;
537  }
538  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
539
540  SetJniGlobalsMax(options->jni_globals_max_);
541  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
542
543  host_prefix_ = options->host_prefix_;
544  boot_class_path_ = options->boot_class_path_;
545  class_path_ = options->class_path_;
546  properties_ = options->properties_;
547
548  is_zygote_ = options->is_zygote_;
549
550  vfprintf_ = options->hook_vfprintf_;
551  exit_ = options->hook_exit_;
552  abort_ = options->hook_abort_;
553
554  default_stack_size_ = options->stack_size_;
555  stack_trace_file_ = options->stack_trace_file_;
556
557  monitor_list_ = new MonitorList;
558  thread_list_ = new ThreadList;
559  intern_table_ = new InternTable;
560
561  Heap::Init(options->heap_initial_size_,
562             options->heap_maximum_size_,
563             options->heap_growth_limit_,
564             options->images_);
565
566  BlockSignals();
567
568  java_vm_ = new JavaVMExt(this, options.get());
569
570  Thread::Startup();
571
572  // ClassLinker needs an attached thread, but we can't fully attach a thread
573  // without creating objects.
574  Thread::Attach(this, "main", false);
575
576  // Set us to runnable so tools using a runtime can allocate and GC by default
577  Thread::Current()->SetState(Thread::kRunnable);
578
579  CHECK_GE(Heap::GetSpaces().size(), 1U);
580  class_linker_ = ((Heap::GetSpaces()[0]->IsImageSpace())
581                   ? ClassLinker::Create(intern_table_)
582                   : ClassLinker::Create(options->boot_class_path_, intern_table_));
583
584  VLOG(startup) << "Runtime::Init exiting";
585  return true;
586}
587
588void Runtime::InitNativeMethods() {
589  VLOG(startup) << "Runtime::InitNativeMethods entering";
590  Thread* self = Thread::Current();
591  JNIEnv* env = self->GetJniEnv();
592
593  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
594  CHECK_EQ(self->GetState(), Thread::kNative);
595
596  // First set up JniConstants, which is used by both the runtime's built-in native
597  // methods and libcore.
598  JniConstants::init(env);
599
600  // Then set up the native methods provided by the runtime itself.
601  RegisterRuntimeNativeMethods(env);
602
603  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
604  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
605  // the library that implements System.loadLibrary!
606  LoadJniLibrary(instance_->GetJavaVM(), "javacore");
607  VLOG(startup) << "Runtime::InitNativeMethods exiting";
608}
609
610void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
611#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
612  REGISTER(register_dalvik_system_DexFile);
613  REGISTER(register_dalvik_system_VMDebug);
614  REGISTER(register_dalvik_system_VMRuntime);
615  REGISTER(register_dalvik_system_VMStack);
616  REGISTER(register_dalvik_system_Zygote);
617  REGISTER(register_java_lang_Class);
618  REGISTER(register_java_lang_Object);
619  REGISTER(register_java_lang_Runtime);
620  REGISTER(register_java_lang_String);
621  REGISTER(register_java_lang_System);
622  REGISTER(register_java_lang_Thread);
623  REGISTER(register_java_lang_Throwable);
624  REGISTER(register_java_lang_VMClassLoader);
625  REGISTER(register_java_lang_reflect_Array);
626  REGISTER(register_java_lang_reflect_Constructor);
627  REGISTER(register_java_lang_reflect_Field);
628  REGISTER(register_java_lang_reflect_Method);
629  REGISTER(register_java_lang_reflect_Proxy);
630  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
631  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
632  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
633  REGISTER(register_sun_misc_Unsafe);
634#undef REGISTER
635}
636
637void Runtime::Dump(std::ostream& os) {
638  // TODO: dump other runtime statistics?
639  GetClassLinker()->DumpForSigQuit(os);
640  GetInternTable()->DumpForSigQuit(os);
641  os << "\n";
642
643  thread_list_->Dump(os);
644}
645
646void Runtime::DumpLockHolders(std::ostream& os) {
647  pid_t heap_lock_owner = Heap::GetLockOwner();
648  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
649  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
650  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
651  if ((heap_lock_owner | thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
652    os << "Heap lock owner tid: " << heap_lock_owner << "\n"
653       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
654       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
655       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
656  }
657}
658
659void Runtime::SetStatsEnabled(bool new_state) {
660  if (new_state == true) {
661    GetStats()->Clear(~0);
662    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
663    Thread::Current()->GetStats()->Clear(~0);
664  }
665  stats_enabled_ = new_state;
666}
667
668void Runtime::ResetStats(int kinds) {
669  GetStats()->Clear(kinds & 0xffff);
670  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
671  Thread::Current()->GetStats()->Clear(kinds >> 16);
672}
673
674RuntimeStats* Runtime::GetStats() {
675  return &stats_;
676}
677
678int32_t Runtime::GetStat(int kind) {
679  RuntimeStats* stats;
680  if (kind < (1<<16)) {
681    stats = GetStats();
682  } else {
683    stats = Thread::Current()->GetStats();
684    kind >>= 16;
685  }
686  switch (kind) {
687  case KIND_ALLOCATED_OBJECTS:
688    return stats->allocated_objects;
689  case KIND_ALLOCATED_BYTES:
690    return stats->allocated_bytes;
691  case KIND_FREED_OBJECTS:
692    return stats->freed_objects;
693  case KIND_FREED_BYTES:
694    return stats->freed_bytes;
695  case KIND_GC_INVOCATIONS:
696    return stats->gc_for_alloc_count;
697  case KIND_CLASS_INIT_COUNT:
698    return stats->class_init_count;
699  case KIND_CLASS_INIT_TIME:
700    // Convert ns to us, reduce to 32 bits.
701    return (int) (stats->class_init_time_ns / 1000);
702  case KIND_EXT_ALLOCATED_OBJECTS:
703  case KIND_EXT_ALLOCATED_BYTES:
704  case KIND_EXT_FREED_OBJECTS:
705  case KIND_EXT_FREED_BYTES:
706    return 0;  // backward compatibility
707  default:
708    CHECK(false);
709    return -1; // unreachable
710  }
711}
712
713void Runtime::BlockSignals() {
714  sigset_t sigset;
715  if (sigemptyset(&sigset) == -1) {
716    PLOG(FATAL) << "sigemptyset failed";
717  }
718  if (sigaddset(&sigset, SIGPIPE) == -1) {
719    PLOG(ERROR) << "sigaddset SIGPIPE failed";
720  }
721  // SIGQUIT is used to dump the runtime's state (including stack traces).
722  if (sigaddset(&sigset, SIGQUIT) == -1) {
723    PLOG(ERROR) << "sigaddset SIGQUIT failed";
724  }
725  // SIGUSR1 is used to initiate a heap dump.
726  if (sigaddset(&sigset, SIGUSR1) == -1) {
727    PLOG(ERROR) << "sigaddset SIGUSR1 failed";
728  }
729  CHECK_EQ(sigprocmask(SIG_BLOCK, &sigset, NULL), 0);
730}
731
732void Runtime::AttachCurrentThread(const char* name, bool as_daemon) {
733  Thread::Attach(instance_, name, as_daemon);
734}
735
736void Runtime::DetachCurrentThread() {
737  // TODO: check we're not calling DetachCurrentThread from a call stack that
738  // includes managed frames. (It's only valid if the stack is all-native.)
739  thread_list_->Unregister();
740}
741
742void Runtime::VisitRoots(Heap::RootVisitor* visitor, void* arg) const {
743  Dbg::VisitRoots(visitor, arg);
744  class_linker_->VisitRoots(visitor, arg);
745  intern_table_->VisitRoots(visitor, arg);
746  java_vm_->VisitRoots(visitor, arg);
747  thread_list_->VisitRoots(visitor, arg);
748  visitor(jni_stub_array_, arg);
749  visitor(abstract_method_error_stub_array_, arg);
750  for (int i = 0; i < Runtime::kLastTrampolineMethodType; i++) {
751    visitor(resolution_stub_array_[i], arg);
752  }
753  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
754    visitor(callee_save_method_[i], arg);
755  }
756}
757
758bool Runtime::HasJniDlsymLookupStub() const {
759  return jni_stub_array_ != NULL;
760}
761
762ByteArray* Runtime::GetJniDlsymLookupStub() const {
763  CHECK(jni_stub_array_ != NULL);
764  return jni_stub_array_;
765}
766
767void Runtime::SetJniDlsymLookupStub(ByteArray* jni_stub_array) {
768  CHECK(jni_stub_array != NULL)  << " jni_stub_array=" << jni_stub_array;
769  CHECK(jni_stub_array_ == NULL || jni_stub_array_ == jni_stub_array)
770      << "jni_stub_array_=" << jni_stub_array_ << " jni_stub_array=" << jni_stub_array;
771  jni_stub_array_ = jni_stub_array;
772}
773
774bool Runtime::HasAbstractMethodErrorStubArray() const {
775  return abstract_method_error_stub_array_ != NULL;
776}
777
778ByteArray* Runtime::GetAbstractMethodErrorStubArray() const {
779  CHECK(abstract_method_error_stub_array_ != NULL);
780  return abstract_method_error_stub_array_;
781}
782
783void Runtime::SetAbstractMethodErrorStubArray(ByteArray* abstract_method_error_stub_array) {
784  CHECK(abstract_method_error_stub_array != NULL);
785  CHECK(abstract_method_error_stub_array_ == NULL || abstract_method_error_stub_array_ == abstract_method_error_stub_array);
786  abstract_method_error_stub_array_ = abstract_method_error_stub_array;
787}
788
789
790Runtime::TrampolineType Runtime::GetTrampolineType(Method* method) {
791  if (method == NULL) {
792    return Runtime::kUnknownMethod;
793  } else if (method->IsStatic()) {
794    return Runtime::kStaticMethod;
795  } else {
796    return Runtime::kInstanceMethod;
797  }
798}
799
800bool Runtime::HasResolutionStubArray(TrampolineType type) const {
801  return resolution_stub_array_[type] != NULL;
802}
803
804ByteArray* Runtime::GetResolutionStubArray(TrampolineType type) const {
805  CHECK(HasResolutionStubArray(type));
806  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastTrampolineMethodType));
807  return resolution_stub_array_[type];
808}
809
810void Runtime::SetResolutionStubArray(ByteArray* resolution_stub_array, TrampolineType type) {
811  CHECK(resolution_stub_array != NULL);
812  CHECK(!HasResolutionStubArray(type) || resolution_stub_array_[type] == resolution_stub_array);
813  resolution_stub_array_[type] = resolution_stub_array;
814}
815
816Method* Runtime::CreateCalleeSaveMethod(InstructionSet instruction_set, CalleeSaveType type) {
817  Class* method_class = Method::GetMethodClass();
818  SirtRef<Method> method(down_cast<Method*>(method_class->AllocObject()));
819  method->SetDeclaringClass(method_class);
820  // TODO: use a special method for callee saves
821  method->SetMethodIndex(DexFile::kDexNoIndex16);
822  method->SetCode(NULL);
823  if ((instruction_set == kThumb2) || (instruction_set == kArm)) {
824    uint32_t ref_spills = (1 << art::arm::R5) | (1 << art::arm::R6)  | (1 << art::arm::R7) |
825                          (1 << art::arm::R8) | (1 << art::arm::R10) | (1 << art::arm::R11);
826    uint32_t arg_spills = (1 << art::arm::R1) | (1 << art::arm::R2) | (1 << art::arm::R3);
827    uint32_t all_spills = (1 << art::arm::R4) | (1 << art::arm::R9);
828    uint32_t core_spills = ref_spills | (type == kRefsAndArgs ? arg_spills :0) |
829                           (type == kSaveAll ? all_spills :0) | (1 << art::arm::LR);
830    uint32_t fp_all_spills = (1 << art::arm::S0)  | (1 << art::arm::S1)  | (1 << art::arm::S2) |
831                             (1 << art::arm::S3)  | (1 << art::arm::S4)  | (1 << art::arm::S5) |
832                             (1 << art::arm::S6)  | (1 << art::arm::S7)  | (1 << art::arm::S8) |
833                             (1 << art::arm::S9)  | (1 << art::arm::S10) | (1 << art::arm::S11) |
834                             (1 << art::arm::S12) | (1 << art::arm::S13) | (1 << art::arm::S14) |
835                             (1 << art::arm::S15) | (1 << art::arm::S16) | (1 << art::arm::S17) |
836                             (1 << art::arm::S18) | (1 << art::arm::S19) | (1 << art::arm::S20) |
837                             (1 << art::arm::S21) | (1 << art::arm::S22) | (1 << art::arm::S23) |
838                             (1 << art::arm::S24) | (1 << art::arm::S25) | (1 << art::arm::S26) |
839                             (1 << art::arm::S27) | (1 << art::arm::S28) | (1 << art::arm::S29) |
840                             (1 << art::arm::S30) | (1 << art::arm::S31);
841    uint32_t fp_spills = type == kSaveAll ? fp_all_spills : 0;
842    size_t frame_size = RoundUp((__builtin_popcount(core_spills) /* gprs */ +
843                                 __builtin_popcount(fp_spills) /* fprs */ +
844                                 1 /* Method* */) * kPointerSize, kStackAlignment);
845    method->SetFrameSizeInBytes(frame_size);
846    method->SetCoreSpillMask(core_spills);
847    method->SetFpSpillMask(fp_spills);
848  } else if (instruction_set == kX86) {
849    method->SetFrameSizeInBytes(32);
850    method->SetCoreSpillMask((1 << art::x86::EBX) | (1 << art::x86::EBP) | (1 << art::x86::ESI) |
851                             (1 << art::x86::EDI));
852    method->SetFpSpillMask(0);
853  } else {
854    UNIMPLEMENTED(FATAL);
855  }
856  return method.get();
857}
858
859bool Runtime::HasCalleeSaveMethod(CalleeSaveType type) const {
860  return callee_save_method_[type] != NULL;
861}
862
863// Returns a special method that describes all callee saves being spilled to the stack.
864Method* Runtime::GetCalleeSaveMethod(CalleeSaveType type) const {
865  CHECK(HasCalleeSaveMethod(type));
866  return callee_save_method_[type];
867}
868
869void Runtime::SetCalleeSaveMethod(Method* method, CalleeSaveType type) {
870  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
871  callee_save_method_[type] = method;
872}
873
874void Runtime::EnableMethodTracing(Trace* tracer) {
875  CHECK(!IsMethodTracingActive());
876  tracer_ = tracer;
877}
878
879void Runtime::DisableMethodTracing() {
880  CHECK(IsMethodTracingActive());
881  delete tracer_;
882  tracer_ = NULL;
883}
884
885bool Runtime::IsMethodTracingActive() const {
886  return (tracer_ != NULL);
887}
888
889Trace* Runtime::GetTracer() const {
890  CHECK(IsMethodTracingActive());
891  return tracer_;
892}
893
894}  // namespace art
895