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* Copyright (C) 2011 The Android Open Source Project
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <stdio.h>
#include <iosfwd>
#include <string>
#include <utility>
#include <vector>
#include <jni.h>
#include "constants.h"
#include "heap.h"
#include "globals.h"
#include "macros.h"
#include "runtime_stats.h"
#include "stringpiece.h"
namespace art {
template<class T> class PrimitiveArray;
typedef PrimitiveArray<int8_t> ByteArray;
class ClassLinker;
class ClassLoader;
class DexFile;
class Heap;
class InternTable;
class JavaVMExt;
class Method;
class MonitorList;
class SignalCatcher;
class String;
class ThreadList;
class Trace;
class Runtime {
typedef std::vector<std::pair<StringPiece, const void*> > Options;
class ParsedOptions {
// returns null if problem parsing and ignore_unrecognized is false
static ParsedOptions* Create(const Options& options, bool ignore_unrecognized);
std::string boot_class_path_;
std::string class_path_;
std::string host_prefix_;
std::string image_;
bool check_jni_;
std::string jni_trace_;
bool is_compiler_;
bool is_zygote_;
size_t heap_initial_size_;
size_t heap_maximum_size_;
size_t heap_growth_limit_;
size_t stack_size_;
size_t jni_globals_max_;
size_t lock_profiling_threshold_;
std::string stack_trace_file_;
bool (*hook_is_sensitive_thread_)();
jint (*hook_vfprintf_)(FILE* stream, const char* format, va_list ap);
void (*hook_exit_)(jint status);
void (*hook_abort_)();
std::vector<std::string> properties_;
ParsedOptions() {}
// Creates and initializes a new runtime.
static Runtime* Create(const Options& options, bool ignore_unrecognized);
bool IsCompiler() const {
return is_compiler_;
bool IsZygote() const {
return is_zygote_;
const std::string& GetHostPrefix() const {
return host_prefix_;
// Starts a runtime, which may cause threads to be started and code to run.
void Start();
bool IsShuttingDown() const;
bool IsStarted() const;
static Runtime* Current() {
return instance_;
// Compiles a dex file.
static void Compile(const StringPiece& filename);
// Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most
// callers should prefer.
// This isn't marked ((noreturn)) because then gcc will merge multiple calls
// in a single function together. This reduces code size slightly, but means
// that the native stack trace we get may point at the wrong call site.
static void Abort(const char* file, int line);
// Attaches the current native thread to the runtime.
void AttachCurrentThread(const char* name, bool as_daemon);
void CallExitHook(jint status);
// Detaches the current native thread from the runtime.
void DetachCurrentThread();
void Dump(std::ostream& os);
void DumpLockHolders(std::ostream& os);
const std::string& GetBootClassPath() const {
return boot_class_path_;
ClassLinker* GetClassLinker() const {
return class_linker_;
const std::string& GetClassPath() const {
return class_path_;
size_t GetDefaultStackSize() const {
return default_stack_size_;
InternTable* GetInternTable() const {
return intern_table_;
JavaVMExt* GetJavaVM() const {
return java_vm_;
const std::vector<std::string>& GetProperties() const {
return properties_;
MonitorList* GetMonitorList() const {
return monitor_list_;
ThreadList* GetThreadList() const {
return thread_list_;
const char* GetVersion() const {
return "2.0.0";
void VisitRoots(Heap::RootVisitor* visitor, void* arg) const;
bool HasJniDlsymLookupStub() const;
ByteArray* GetJniDlsymLookupStub() const;
void SetJniDlsymLookupStub(ByteArray* jni_stub_array);
bool HasAbstractMethodErrorStubArray() const;
ByteArray* GetAbstractMethodErrorStubArray() const;
void SetAbstractMethodErrorStubArray(ByteArray* abstract_method_error_stub_array);
enum TrampolineType {
kLastTrampolineMethodType // Value used for iteration
static TrampolineType GetTrampolineType(Method* method);
bool HasResolutionStubArray(TrampolineType type) const;
ByteArray* GetResolutionStubArray(TrampolineType type) const;
void SetResolutionStubArray(ByteArray* resolution_stub_array, TrampolineType type);
// Returns a special method that describes all callee saves being spilled to the stack.
enum CalleeSaveType {
kLastCalleeSaveType // Value used for iteration
Method* CreateCalleeSaveMethod(InstructionSet instruction_set, CalleeSaveType type);
bool HasCalleeSaveMethod(CalleeSaveType type) const;
Method* GetCalleeSaveMethod(CalleeSaveType type) const;
void SetCalleeSaveMethod(Method* method, CalleeSaveType type);
Method* CreateRefOnlyCalleeSaveMethod(InstructionSet instruction_set);
Method* CreateRefAndArgsCalleeSaveMethod(InstructionSet instruction_set);
int32_t GetStat(int kind);
RuntimeStats* GetStats();
bool HasStatsEnabled() const {
return stats_enabled_;
void ResetStats(int kinds);
void SetStatsEnabled(bool new_state);
void DidForkFromZygote();
void EnableMethodTracing(Trace* tracer);
void DisableMethodTracing();
bool IsMethodTracingActive() const;
Trace* GetTracer() const;
static void PlatformAbort(const char*, int);
void BlockSignals();
bool Init(const Options& options, bool ignore_unrecognized);
void InitNativeMethods();
void RegisterRuntimeNativeMethods(JNIEnv* env);
void StartDaemonThreads();
void StartSignalCatcher();
bool is_compiler_;
bool is_zygote_;
// The host prefix is used during cross compilation. It is removed
// from the start of host paths such as:
// $ANDROID_PRODUCT_OUT/system/framework/boot.oat
// to produce target paths such as
// /system/framework/boot.oat
// Similarly it is prepended to target paths to arrive back at a
// host past. In both cases this is necessary because image and oat
// files embedded expect paths of dependent files (an image points
// to an oat file and an oat files to one or more dex files). These
// files contain the expected target path.
std::string host_prefix_;
std::string boot_class_path_;
std::string class_path_;
std::vector<std::string> properties_;
// The default stack size for managed threads created by the runtime.
size_t default_stack_size_;
MonitorList* monitor_list_;
ThreadList* thread_list_;
InternTable* intern_table_;
ClassLinker* class_linker_;
SignalCatcher* signal_catcher_;
std::string stack_trace_file_;
JavaVMExt* java_vm_;
ByteArray* jni_stub_array_;
ByteArray* abstract_method_error_stub_array_;
ByteArray* resolution_stub_array_[kLastTrampolineMethodType];
Method* callee_save_method_[kLastCalleeSaveType];
// As returned by ClassLoader.getSystemClassLoader()
ClassLoader* system_class_loader_;
bool shutting_down_;
bool started_;
// Hooks supported by JNI_CreateJavaVM
jint (*vfprintf_)(FILE* stream, const char* format, va_list ap);
void (*exit_)(jint status);
void (*abort_)();
bool stats_enabled_;
RuntimeStats stats_;
Trace* tracer_;
// A pointer to the active runtime or NULL.
static Runtime* instance_;
static Mutex abort_lock_;
} // namespace art
#endif // ART_SRC_RUNTIME_H_