| // Copyright 2011 Google Inc. All Rights Reserved. |
| |
| #include "runtime.h" |
| |
| #include <cstdio> |
| #include <cstdlib> |
| #include <limits> |
| #include <vector> |
| |
| #include "UniquePtr.h" |
| #include "class_linker.h" |
| #include "heap.h" |
| #include "intern_table.h" |
| #include "jni_internal.h" |
| #include "signal_catcher.h" |
| #include "thread.h" |
| |
| // TODO: this drags in cutil/log.h, which conflicts with our logging.h. |
| #include "JniConstants.h" |
| |
| namespace art { |
| |
| Runtime* Runtime::instance_ = NULL; |
| |
| Runtime::~Runtime() { |
| // TODO: use smart pointers instead. (we'll need the pimpl idiom.) |
| delete class_linker_; |
| Heap::Destroy(); |
| delete signal_catcher_; |
| delete thread_list_; |
| delete intern_table_; |
| delete java_vm_; |
| Thread::Shutdown(); |
| // TODO: acquire a static mutex on Runtime to avoid racing. |
| CHECK(instance_ == NULL || instance_ == this); |
| instance_ = NULL; |
| } |
| |
| void Runtime::Abort(const char* file, int line) { |
| // Get any pending output out of the way. |
| fflush(NULL); |
| |
| // Many people have difficulty distinguish aborts from crashes, |
| // so be explicit. |
| LogMessage(file, line, ERROR, -1).stream() << "Runtime aborting..."; |
| |
| // Perform any platform-specific pre-abort actions. |
| PlatformAbort(file, line); |
| |
| // use abort hook if we have one |
| if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) { |
| Runtime::Current()->abort_(); |
| // notreached |
| } |
| |
| // If we call abort(3) on a device, all threads in the process |
| // receive SIGABRT. debuggerd dumps the stack trace of the main |
| // thread, whether or not that was the thread that failed. By |
| // stuffing a value into a bogus address, we cause a segmentation |
| // fault in the current thread, and get a useful log from debuggerd. |
| // We can also trivially tell the difference between a VM crash and |
| // a deliberate abort by looking at the fault address. |
| *reinterpret_cast<char*>(0xdeadd00d) = 38; |
| abort(); |
| // notreached |
| } |
| |
| void Runtime::CallExitHook(jint status) { |
| if (exit_ != NULL) { |
| ScopedThreadStateChange tsc(Thread::Current(), Thread::kNative); |
| exit_(status); |
| LOG(WARNING) << "Exit hook returned instead of exiting!"; |
| } |
| } |
| |
| // Parse a string of the form /[0-9]+[kKmMgG]?/, which is used to specify |
| // memory sizes. [kK] indicates kilobytes, [mM] megabytes, and |
| // [gG] gigabytes. |
| // |
| // "s" should point just past the "-Xm?" part of the string. |
| // "div" specifies a divisor, e.g. 1024 if the value must be a multiple |
| // of 1024. |
| // |
| // The spec says the -Xmx and -Xms options must be multiples of 1024. It |
| // doesn't say anything about -Xss. |
| // |
| // Returns 0 (a useless size) if "s" is malformed or specifies a low or |
| // non-evenly-divisible value. |
| // |
| size_t ParseMemoryOption(const char *s, size_t div) { |
| // strtoul accepts a leading [+-], which we don't want, |
| // so make sure our string starts with a decimal digit. |
| if (isdigit(*s)) { |
| const char *s2; |
| size_t val = strtoul(s, (char **)&s2, 10); |
| if (s2 != s) { |
| // s2 should be pointing just after the number. |
| // If this is the end of the string, the user |
| // has specified a number of bytes. Otherwise, |
| // there should be exactly one more character |
| // that specifies a multiplier. |
| if (*s2 != '\0') { |
| // The remainder of the string is either a single multiplier |
| // character, or nothing to indicate that the value is in |
| // bytes. |
| char c = *s2++; |
| if (*s2 == '\0') { |
| size_t mul; |
| if (c == '\0') { |
| mul = 1; |
| } else if (c == 'k' || c == 'K') { |
| mul = KB; |
| } else if (c == 'm' || c == 'M') { |
| mul = MB; |
| } else if (c == 'g' || c == 'G') { |
| mul = GB; |
| } else { |
| // Unknown multiplier character. |
| return 0; |
| } |
| |
| if (val <= std::numeric_limits<size_t>::max() / mul) { |
| val *= mul; |
| } else { |
| // Clamp to a multiple of 1024. |
| val = std::numeric_limits<size_t>::max() & ~(1024-1); |
| } |
| } else { |
| // There's more than one character after the numeric part. |
| return 0; |
| } |
| } |
| // The man page says that a -Xm value must be a multiple of 1024. |
| if (val % div == 0) { |
| return val; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| void LoadJniLibrary(JavaVMExt* vm, const char* name) { |
| // TODO: OS_SHARED_LIB_FORMAT_STR |
| std::string mapped_name(StringPrintf("lib%s.so", name)); |
| std::string reason; |
| if (!vm->LoadNativeLibrary(mapped_name, NULL, reason)) { |
| LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " |
| << reason; |
| } |
| } |
| |
| const DexFile* Open(const std::string& filename) { |
| if (filename.size() < 4) { |
| LOG(WARNING) << "Ignoring short classpath entry '" << filename << "'"; |
| return NULL; |
| } |
| std::string suffix(filename.substr(filename.size() - 4)); |
| if (suffix == ".zip" || suffix == ".jar" || suffix == ".apk") { |
| return DexFile::OpenZip(filename); |
| } else { |
| return DexFile::OpenFile(filename); |
| } |
| } |
| |
| void CreateBootClassPath(const char* boot_class_path_cstr, |
| std::vector<const DexFile*>& boot_class_path_vector) { |
| CHECK(boot_class_path_cstr != NULL); |
| std::vector<std::string> parsed; |
| Split(boot_class_path_cstr, ':', parsed); |
| for (size_t i = 0; i < parsed.size(); ++i) { |
| const DexFile* dex_file = Open(parsed[i]); |
| if (dex_file != NULL) { |
| boot_class_path_vector.push_back(dex_file); |
| } |
| } |
| } |
| |
| Runtime::ParsedOptions* Runtime::ParsedOptions::Create(const Options& options, bool ignore_unrecognized) { |
| UniquePtr<ParsedOptions> parsed(new ParsedOptions()); |
| const char* boot_class_path = getenv("BOOTCLASSPATH"); |
| parsed->boot_image_ = NULL; |
| #ifdef NDEBUG |
| // -Xcheck:jni is off by default for regular builds... |
| parsed->check_jni_ = false; |
| #else |
| // ...but on by default in debug builds. |
| parsed->check_jni_ = true; |
| #endif |
| parsed->heap_initial_size_ = Heap::kInitialSize; |
| parsed->heap_maximum_size_ = Heap::kMaximumSize; |
| parsed->stack_size_ = Thread::kDefaultStackSize; |
| |
| parsed->hook_vfprintf_ = vfprintf; |
| parsed->hook_exit_ = exit; |
| parsed->hook_abort_ = abort; |
| |
| for (size_t i = 0; i < options.size(); ++i) { |
| const StringPiece& option = options[i].first; |
| if (option.starts_with("-Xbootclasspath:")) { |
| boot_class_path = option.substr(strlen("-Xbootclasspath:")).data(); |
| } else if (option == "bootclasspath") { |
| const void* dex_vector = options[i].second; |
| const std::vector<const DexFile*>* v |
| = reinterpret_cast<const std::vector<const DexFile*>*>(dex_vector); |
| if (v == NULL) { |
| if (ignore_unrecognized) { |
| continue; |
| } |
| // TODO: usage |
| LOG(FATAL) << "Could not parse " << option; |
| return NULL; |
| } |
| parsed->boot_class_path_ = *v; |
| } else if (option.starts_with("-Xbootimage:")) { |
| parsed->boot_image_ = option.substr(strlen("-Xbootimage:")).data(); |
| } else if (option.starts_with("-Xcheck:jni")) { |
| parsed->check_jni_ = true; |
| } else if (option.starts_with("-Xms")) { |
| size_t size = ParseMemoryOption(option.substr(strlen("-Xms")).data(), 1024); |
| if (size == 0) { |
| if (ignore_unrecognized) { |
| continue; |
| } |
| // TODO: usage |
| LOG(FATAL) << "Could not parse " << option; |
| return NULL; |
| } |
| parsed->heap_initial_size_ = size; |
| } else if (option.starts_with("-Xmx")) { |
| size_t size = ParseMemoryOption(option.substr(strlen("-Xmx")).data(), 1024); |
| if (size == 0) { |
| if (ignore_unrecognized) { |
| continue; |
| } |
| // TODO: usage |
| LOG(FATAL) << "Could not parse " << option; |
| return NULL; |
| } |
| parsed->heap_maximum_size_ = size; |
| } else if (option.starts_with("-Xss")) { |
| size_t size = ParseMemoryOption(option.substr(strlen("-Xss")).data(), 1); |
| if (size == 0) { |
| if (ignore_unrecognized) { |
| continue; |
| } |
| // TODO: usage |
| LOG(FATAL) << "Could not parse " << option; |
| return NULL; |
| } |
| parsed->stack_size_ = size; |
| } else if (option.starts_with("-D")) { |
| parsed->properties_.push_back(option.substr(strlen("-D")).data()); |
| } else if (option.starts_with("-Xjnitrace:")) { |
| parsed->jni_trace_ = option.substr(strlen("-Xjnitrace:")).data(); |
| } else if (option.starts_with("-verbose:")) { |
| std::vector<std::string> verbose_options; |
| Split(option.substr(strlen("-verbose:")).data(), ',', verbose_options); |
| for (size_t i = 0; i < verbose_options.size(); ++i) { |
| parsed->verbose_.insert(verbose_options[i]); |
| } |
| } else if (option == "vfprintf") { |
| parsed->hook_vfprintf_ = reinterpret_cast<int (*)(FILE *, const char*, va_list)>(options[i].second); |
| } else if (option == "exit") { |
| parsed->hook_exit_ = reinterpret_cast<void(*)(jint)>(options[i].second); |
| } else if (option == "abort") { |
| parsed->hook_abort_ = reinterpret_cast<void(*)()>(options[i].second); |
| } else { |
| if (!ignore_unrecognized) { |
| // TODO: print usage via vfprintf |
| LOG(FATAL) << "Unrecognized option " << option; |
| return NULL; |
| } |
| } |
| } |
| |
| if (boot_class_path == NULL) { |
| boot_class_path = ""; |
| } |
| if (parsed->boot_class_path_.size() == 0) { |
| CreateBootClassPath(boot_class_path, parsed->boot_class_path_); |
| } |
| return parsed.release(); |
| } |
| |
| Runtime* Runtime::Create(const std::vector<const DexFile*>& boot_class_path) { |
| Runtime::Options options; |
| options.push_back(std::make_pair("bootclasspath", &boot_class_path)); |
| return Runtime::Create(options, false); |
| } |
| |
| Runtime* Runtime::Create(const Options& options, bool ignore_unrecognized) { |
| // TODO: acquire a static mutex on Runtime to avoid racing. |
| if (Runtime::instance_ != NULL) { |
| return NULL; |
| } |
| UniquePtr<Runtime> runtime(new Runtime()); |
| bool success = runtime->Init(options, ignore_unrecognized); |
| if (!success) { |
| return NULL; |
| } |
| instance_ = runtime.release(); |
| |
| instance_->InitLibraries(); |
| instance_->signal_catcher_ = new SignalCatcher; |
| |
| return instance_; |
| } |
| |
| bool Runtime::Init(const Options& raw_options, bool ignore_unrecognized) { |
| CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); |
| |
| UniquePtr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized)); |
| if (options.get() == NULL) { |
| return false; |
| } |
| vfprintf_ = options->hook_vfprintf_; |
| exit_ = options->hook_exit_; |
| abort_ = options->hook_abort_; |
| |
| stack_size_ = options->stack_size_; |
| thread_list_ = ThreadList::Create(); |
| |
| intern_table_ = new InternTable; |
| |
| if (!Heap::Init(options->heap_initial_size_, |
| options->heap_maximum_size_, |
| options->boot_image_)) { |
| return false; |
| } |
| |
| BlockSignals(); |
| |
| java_vm_ = new JavaVMExt(this, options.get()); |
| |
| if (!Thread::Startup()) { |
| return false; |
| } |
| |
| thread_list_->Register(Thread::Attach(this)); |
| |
| class_linker_ = ClassLinker::Create(options->boot_class_path_, intern_table_, Heap::GetBootSpace()); |
| |
| return true; |
| } |
| |
| void Runtime::InitLibraries() { |
| Thread* self = Thread::Current(); |
| JNIEnv* env = self->GetJniEnv(); |
| |
| // Must be in the kNative state for JNI-based method registration. |
| ScopedThreadStateChange tsc(self, Thread::kNative); |
| |
| // First set up the native methods provided by the runtime itself. |
| RegisterRuntimeNativeMethods(env); |
| |
| // Now set up libcore, which is just a JNI library with a JNI_OnLoad. |
| // Most JNI libraries can just use System.loadLibrary, but you can't |
| // if you're the library that implements System.loadLibrary! |
| JniConstants::init(env); |
| LoadJniLibrary(instance_->GetJavaVM(), "javacore"); |
| } |
| |
| void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { |
| #define REGISTER(FN) extern void FN(JNIEnv*); FN(env) |
| //REGISTER(register_dalvik_bytecode_OpcodeInfo); |
| //REGISTER(register_dalvik_system_DexFile); |
| //REGISTER(register_dalvik_system_VMDebug); |
| //REGISTER(register_dalvik_system_VMRuntime); |
| //REGISTER(register_dalvik_system_VMStack); |
| //REGISTER(register_dalvik_system_Zygote); |
| //REGISTER(register_java_lang_Class); |
| REGISTER(register_java_lang_Object); |
| REGISTER(register_java_lang_Runtime); |
| REGISTER(register_java_lang_String); |
| REGISTER(register_java_lang_System); |
| //REGISTER(register_java_lang_Thread); |
| //REGISTER(register_java_lang_Throwable); |
| //REGISTER(register_java_lang_VMClassLoader); |
| //REGISTER(register_java_lang_reflect_AccessibleObject); |
| //REGISTER(register_java_lang_reflect_Array); |
| //REGISTER(register_java_lang_reflect_Constructor); |
| //REGISTER(register_java_lang_reflect_Field); |
| //REGISTER(register_java_lang_reflect_Method); |
| //REGISTER(register_java_lang_reflect_Proxy); |
| REGISTER(register_java_util_concurrent_atomic_AtomicLong); |
| //REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer); |
| //REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal); |
| //REGISTER(register_sun_misc_Unsafe); |
| #undef REGISTER |
| } |
| |
| void Runtime::DumpStatistics(std::ostream& os) { |
| // TODO: dump other runtime statistics? |
| os << "Loaded classes: " << class_linker_->NumLoadedClasses() << "\n"; |
| os << "Intern table size: " << GetInternTable()->Size() << "\n"; |
| // LOGV("VM stats: meth=%d ifld=%d sfld=%d linear=%d", |
| // gDvm.numDeclaredMethods, |
| // gDvm.numDeclaredInstFields, |
| // gDvm.numDeclaredStaticFields, |
| // gDvm.pBootLoaderAlloc->curOffset); |
| // LOGI("GC precise methods: %d", dvmPointerSetGetCount(gDvm.preciseMethods)); |
| } |
| |
| void Runtime::BlockSignals() { |
| sigset_t sigset; |
| if (sigemptyset(&sigset) == -1) { |
| PLOG(FATAL) << "sigemptyset failed"; |
| } |
| if (sigaddset(&sigset, SIGPIPE) == -1) { |
| PLOG(ERROR) << "sigaddset SIGPIPE failed"; |
| } |
| // SIGQUIT is used to dump the runtime's state (including stack traces). |
| if (sigaddset(&sigset, SIGQUIT) == -1) { |
| PLOG(ERROR) << "sigaddset SIGQUIT failed"; |
| } |
| // SIGUSR1 is used to initiate a heap dump. |
| if (sigaddset(&sigset, SIGUSR1) == -1) { |
| PLOG(ERROR) << "sigaddset SIGUSR1 failed"; |
| } |
| CHECK_EQ(sigprocmask(SIG_BLOCK, &sigset, NULL), 0); |
| } |
| |
| void Runtime::AttachCurrentThread(const char* name, JNIEnv** penv, bool as_daemon) { |
| if (as_daemon) { |
| UNIMPLEMENTED(WARNING) << "TODO: do something different for daemon threads"; |
| } |
| Thread* t = Thread::Attach(instance_); |
| thread_list_->Register(t); |
| } |
| |
| void Runtime::DetachCurrentThread() { |
| Thread* self = Thread::Current(); |
| thread_list_->Unregister(self); |
| delete self; |
| } |
| |
| void Runtime::VisitRoots(Heap::RootVisitor* visitor, void* arg) const { |
| class_linker_->VisitRoots(visitor, arg); |
| intern_table_->VisitRoots(visitor, arg); |
| java_vm_->VisitRoots(visitor, arg); |
| thread_list_->VisitRoots(visitor, arg); |
| |
| //(*visitor)(&gDvm.outOfMemoryObj, 0, ROOT_VM_INTERNAL, arg); |
| //(*visitor)(&gDvm.internalErrorObj, 0, ROOT_VM_INTERNAL, arg); |
| //(*visitor)(&gDvm.noClassDefFoundErrorObj, 0, ROOT_VM_INTERNAL, arg); |
| UNIMPLEMENTED(WARNING) << "some roots not marked"; |
| } |
| |
| } // namespace art |