Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1 | // Copyright 2011 Google Inc. All Rights Reserved. |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 2 | |
| 3 | #ifndef ART_SRC_THREAD_H_ |
| 4 | #define ART_SRC_THREAD_H_ |
| 5 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 6 | #include <pthread.h> |
Elliott Hughes | a095764 | 2011-09-02 14:27:33 -0700 | [diff] [blame] | 7 | |
| 8 | #include <iosfwd> |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 9 | #include <list> |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 10 | |
Brian Carlstrom | 1f87008 | 2011-08-23 16:02:11 -0700 | [diff] [blame] | 11 | #include "dex_file.h" |
Brian Carlstrom | 578bbdc | 2011-07-21 14:07:47 -0700 | [diff] [blame] | 12 | #include "globals.h" |
Elliott Hughes | 69f5bc6 | 2011-08-24 09:26:14 -0700 | [diff] [blame] | 13 | #include "jni_internal.h" |
Brian Carlstrom | 578bbdc | 2011-07-21 14:07:47 -0700 | [diff] [blame] | 14 | #include "logging.h" |
| 15 | #include "macros.h" |
Brian Carlstrom | b765be0 | 2011-08-17 23:54:10 -0700 | [diff] [blame] | 16 | #include "mem_map.h" |
Brian Carlstrom | 578bbdc | 2011-07-21 14:07:47 -0700 | [diff] [blame] | 17 | #include "offsets.h" |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 18 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 19 | namespace art { |
| 20 | |
Elliott Hughes | 69f5bc6 | 2011-08-24 09:26:14 -0700 | [diff] [blame] | 21 | class Array; |
Elliott Hughes | 37f7a40 | 2011-08-22 18:56:01 -0700 | [diff] [blame] | 22 | class Class; |
Brian Carlstrom | 1f87008 | 2011-08-23 16:02:11 -0700 | [diff] [blame] | 23 | class ClassLinker; |
Elliott Hughes | edcc09c | 2011-08-21 18:47:05 -0700 | [diff] [blame] | 24 | class ClassLoader; |
Brian Carlstrom | a40f9bc | 2011-07-26 21:26:07 -0700 | [diff] [blame] | 25 | class Method; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 26 | class Object; |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 27 | class Runtime; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 28 | class Thread; |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 29 | class ThreadList; |
Elliott Hughes | e5b0dc8 | 2011-08-23 09:59:02 -0700 | [diff] [blame] | 30 | class Throwable; |
Shih-wei Liao | 55df06b | 2011-08-26 14:39:27 -0700 | [diff] [blame] | 31 | class StackTraceElement; |
buzbee | 1da522d | 2011-09-04 11:22:20 -0700 | [diff] [blame] | 32 | class StaticStorageBase; |
| 33 | |
Shih-wei Liao | 55df06b | 2011-08-26 14:39:27 -0700 | [diff] [blame] | 34 | template<class T> class ObjectArray; |
Shih-wei Liao | 4417536 | 2011-08-28 16:59:17 -0700 | [diff] [blame] | 35 | template<class T> class PrimitiveArray; |
| 36 | typedef PrimitiveArray<int32_t> IntArray; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 37 | |
| 38 | class Mutex { |
| 39 | public: |
| 40 | virtual ~Mutex() {} |
| 41 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 42 | void Lock(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 43 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 44 | bool TryLock(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 45 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 46 | void Unlock(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 47 | |
| 48 | const char* GetName() { return name_; } |
| 49 | |
| 50 | Thread* GetOwner() { return owner_; } |
| 51 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 52 | static Mutex* Create(const char* name); |
| 53 | |
Elliott Hughes | 79082e3 | 2011-08-25 12:07:32 -0700 | [diff] [blame] | 54 | // TODO: only needed because we lack a condition variable abstraction. |
| 55 | pthread_mutex_t* GetImpl() { return &lock_impl_; } |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 56 | |
| 57 | private: |
Elliott Hughes | 18c0753 | 2011-08-18 15:50:51 -0700 | [diff] [blame] | 58 | explicit Mutex(const char* name) : name_(name), owner_(NULL) {} |
| 59 | |
Elliott Hughes | 79082e3 | 2011-08-25 12:07:32 -0700 | [diff] [blame] | 60 | void SetOwner(Thread* thread) { owner_ = thread; } |
| 61 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 62 | const char* name_; |
| 63 | |
| 64 | Thread* owner_; |
| 65 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 66 | pthread_mutex_t lock_impl_; |
| 67 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 68 | DISALLOW_COPY_AND_ASSIGN(Mutex); |
| 69 | }; |
| 70 | |
| 71 | class MutexLock { |
| 72 | public: |
| 73 | explicit MutexLock(Mutex *mu) : mu_(mu) { |
| 74 | mu_->Lock(); |
| 75 | } |
| 76 | ~MutexLock() { mu_->Unlock(); } |
| 77 | private: |
| 78 | Mutex* const mu_; |
| 79 | DISALLOW_COPY_AND_ASSIGN(MutexLock); |
| 80 | }; |
| 81 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 82 | // Stack allocated indirect reference table, allocated within the bridge frame |
| 83 | // between managed and native code. |
| 84 | class StackIndirectReferenceTable { |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 85 | public: |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 86 | // Number of references contained within this SIRT |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 87 | size_t NumberOfReferences() { |
| 88 | return number_of_references_; |
| 89 | } |
| 90 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 91 | // Link to previous SIRT or NULL |
| 92 | StackIndirectReferenceTable* Link() { |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 93 | return link_; |
| 94 | } |
| 95 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 96 | Object** References() { |
| 97 | return references_; |
Ian Rogers | a8cd9f4 | 2011-08-19 16:43:41 -0700 | [diff] [blame] | 98 | } |
| 99 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 100 | // Offset of length within SIRT, used by generated code |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 101 | static size_t NumberOfReferencesOffset() { |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 102 | return OFFSETOF_MEMBER(StackIndirectReferenceTable, number_of_references_); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 103 | } |
| 104 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 105 | // Offset of link within SIRT, used by generated code |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 106 | static size_t LinkOffset() { |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 107 | return OFFSETOF_MEMBER(StackIndirectReferenceTable, link_); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | private: |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 111 | StackIndirectReferenceTable() {} |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 112 | |
| 113 | size_t number_of_references_; |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 114 | StackIndirectReferenceTable* link_; |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 115 | |
Ian Rogers | a8cd9f4 | 2011-08-19 16:43:41 -0700 | [diff] [blame] | 116 | // Fake array, really allocated and filled in by jni_compiler. |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 117 | Object* references_[0]; |
Ian Rogers | a8cd9f4 | 2011-08-19 16:43:41 -0700 | [diff] [blame] | 118 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 119 | DISALLOW_COPY_AND_ASSIGN(StackIndirectReferenceTable); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 120 | }; |
| 121 | |
Ian Rogers | 6de0860 | 2011-08-19 14:52:39 -0700 | [diff] [blame] | 122 | struct NativeToManagedRecord { |
| 123 | NativeToManagedRecord* link; |
| 124 | void* last_top_of_managed_stack; |
| 125 | }; |
| 126 | |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 127 | // Iterator over managed frames up to the first native-to-managed transition |
| 128 | class Frame { |
Shih-wei Liao | 9b576b4 | 2011-08-29 01:45:07 -0700 | [diff] [blame] | 129 | public: |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 130 | Frame() : sp_(NULL) {} |
| 131 | |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 132 | Method* GetMethod() const { |
Elliott Hughes | a095764 | 2011-09-02 14:27:33 -0700 | [diff] [blame] | 133 | return (sp_ != NULL) ? *sp_ : NULL; |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | bool HasNext() const { |
| 137 | return NextMethod() != NULL; |
| 138 | } |
| 139 | |
| 140 | void Next(); |
| 141 | |
Shih-wei Liao | 55df06b | 2011-08-26 14:39:27 -0700 | [diff] [blame] | 142 | uintptr_t GetPC() const; |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 143 | |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 144 | Method** GetSP() const { |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 145 | return sp_; |
| 146 | } |
| 147 | |
| 148 | // TODO: this is here for testing, remove when we have exception unit tests |
| 149 | // that use the real stack |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 150 | void SetSP(Method** sp) { |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 151 | sp_ = sp; |
| 152 | } |
| 153 | |
| 154 | private: |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 155 | Method* NextMethod() const; |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 156 | |
| 157 | friend class Thread; |
| 158 | |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 159 | Method** sp_; |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 160 | }; |
| 161 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 162 | class Thread { |
| 163 | public: |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 164 | enum State { |
| 165 | kUnknown = -1, |
| 166 | kNew, |
| 167 | kRunnable, |
| 168 | kBlocked, |
| 169 | kWaiting, |
| 170 | kTimedWaiting, |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 171 | kNative, |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 172 | kTerminated, |
| 173 | }; |
| 174 | |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 175 | |
Carl Shapiro | 61e019d | 2011-07-14 16:53:09 -0700 | [diff] [blame] | 176 | static const size_t kDefaultStackSize = 64 * KB; |
| 177 | |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 178 | // Runtime support function pointers |
buzbee | 4a3164f | 2011-09-03 11:25:10 -0700 | [diff] [blame] | 179 | void (*pDebugMe)(Method*, uint32_t); |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 180 | void* (*pMemcpy)(void*, const void*, size_t); |
buzbee | 5433072 | 2011-08-23 16:46:55 -0700 | [diff] [blame] | 181 | uint64_t (*pShlLong)(uint64_t, uint32_t); |
| 182 | uint64_t (*pShrLong)(uint64_t, uint32_t); |
| 183 | uint64_t (*pUshrLong)(uint64_t, uint32_t); |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 184 | float (*pI2f)(int); |
| 185 | int (*pF2iz)(float); |
| 186 | float (*pD2f)(double); |
| 187 | double (*pF2d)(float); |
| 188 | double (*pI2d)(int); |
| 189 | int (*pD2iz)(double); |
| 190 | float (*pL2f)(long); |
| 191 | double (*pL2d)(long); |
buzbee | 1b4c859 | 2011-08-31 10:43:51 -0700 | [diff] [blame] | 192 | long long (*pF2l)(float); |
| 193 | long long (*pD2l)(double); |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 194 | float (*pFadd)(float, float); |
| 195 | float (*pFsub)(float, float); |
| 196 | float (*pFdiv)(float, float); |
| 197 | float (*pFmul)(float, float); |
| 198 | float (*pFmodf)(float, float); |
| 199 | double (*pDadd)(double, double); |
| 200 | double (*pDsub)(double, double); |
| 201 | double (*pDdiv)(double, double); |
| 202 | double (*pDmul)(double, double); |
| 203 | double (*pFmod)(double, double); |
| 204 | int (*pIdivmod)(int, int); |
| 205 | int (*pIdiv)(int, int); |
buzbee | 439c4fa | 2011-08-27 15:59:07 -0700 | [diff] [blame] | 206 | long long (*pLmul)(long long, long long); |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 207 | long long (*pLdivmod)(long long, long long); |
buzbee | dfd3d70 | 2011-08-28 12:56:51 -0700 | [diff] [blame] | 208 | Array* (*pAllocFromCode)(uint32_t, Method*, int32_t); |
buzbee | 1da522d | 2011-09-04 11:22:20 -0700 | [diff] [blame] | 209 | Array* (*pCheckAndAllocFromCode)(uint32_t, Method*, int32_t); |
Brian Carlstrom | 1f87008 | 2011-08-23 16:02:11 -0700 | [diff] [blame] | 210 | Object* (*pAllocObjectFromCode)(uint32_t, Method*); |
buzbee | e193174 | 2011-08-28 21:15:53 -0700 | [diff] [blame] | 211 | uint32_t (*pGet32Static)(uint32_t, const Method*); |
| 212 | void (*pSet32Static)(uint32_t, const Method*, uint32_t); |
| 213 | uint64_t (*pGet64Static)(uint32_t, const Method*); |
| 214 | void (*pSet64Static)(uint32_t, const Method*, uint64_t); |
| 215 | Object* (*pGetObjStatic)(uint32_t, const Method*); |
| 216 | void (*pSetObjStatic)(uint32_t, const Method*, Object*); |
Elliott Hughes | 0f4c41d | 2011-09-04 14:58:03 -0700 | [diff] [blame^] | 217 | void (*pCanPutArrayElementFromCode)(const Class*, const Class*); |
buzbee | 1b4c859 | 2011-08-31 10:43:51 -0700 | [diff] [blame] | 218 | int (*pInstanceofNonTrivialFromCode) (const Class*, const Class*); |
| 219 | Method* (*pFindInterfaceMethodInCache)(Class*, uint32_t, const Method*, struct DvmDex*); |
| 220 | bool (*pUnlockObjectFromCode)(Thread*, Object*); |
| 221 | void (*pLockObjectFromCode)(Thread*, Object*); |
| 222 | void (*pThrowException)(Thread*, Throwable*); |
| 223 | void (*pHandleFillArrayDataFromCode)(Array*, const uint16_t*); |
| 224 | Class* (*pInitializeTypeFromCode)(uint32_t, Method*); |
buzbee | 561227c | 2011-09-02 15:28:19 -0700 | [diff] [blame] | 225 | void (*pResolveMethodFromCode)(Method*, uint32_t); |
buzbee | 4a3164f | 2011-09-03 11:25:10 -0700 | [diff] [blame] | 226 | void (*pInvokeInterfaceTrampoline)(void*, void*, void*, void*); |
buzbee | 1da522d | 2011-09-04 11:22:20 -0700 | [diff] [blame] | 227 | StaticStorageBase* (*pInitializeStaticStorage)(uint32_t, const Method*); |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 228 | |
Shih-wei Liao | 9b576b4 | 2011-08-29 01:45:07 -0700 | [diff] [blame] | 229 | class StackVisitor { |
| 230 | public: |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 231 | virtual ~StackVisitor() {} |
Shih-wei Liao | 9b576b4 | 2011-08-29 01:45:07 -0700 | [diff] [blame] | 232 | virtual bool VisitFrame(const Frame& frame) = 0; |
| 233 | }; |
| 234 | |
Carl Shapiro | 61e019d | 2011-07-14 16:53:09 -0700 | [diff] [blame] | 235 | // Creates a new thread. |
Brian Carlstrom | b765be0 | 2011-08-17 23:54:10 -0700 | [diff] [blame] | 236 | static Thread* Create(const Runtime* runtime); |
Carl Shapiro | 61e019d | 2011-07-14 16:53:09 -0700 | [diff] [blame] | 237 | |
| 238 | // Creates a new thread from the calling thread. |
Elliott Hughes | 515a5bc | 2011-08-17 11:08:34 -0700 | [diff] [blame] | 239 | static Thread* Attach(const Runtime* runtime); |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 240 | |
| 241 | static Thread* Current() { |
Carl Shapiro | d0e7e77 | 2011-07-15 14:31:01 -0700 | [diff] [blame] | 242 | void* thread = pthread_getspecific(Thread::pthread_key_self_); |
| 243 | return reinterpret_cast<Thread*>(thread); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 244 | } |
| 245 | |
Elliott Hughes | a095764 | 2011-09-02 14:27:33 -0700 | [diff] [blame] | 246 | void Dump(std::ostream& os) const; |
| 247 | |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 248 | State GetState() const { |
| 249 | return state_; |
| 250 | } |
| 251 | |
| 252 | State SetState(State new_state) { |
| 253 | State old_state = state_; |
| 254 | state_ = new_state; |
| 255 | return old_state; |
| 256 | } |
| 257 | |
| 258 | bool CanAccessDirectReferences() const { |
| 259 | return state_ == kRunnable; |
| 260 | } |
| 261 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 262 | uint32_t GetId() const { |
| 263 | return id_; |
| 264 | } |
| 265 | |
Elliott Hughes | d92bec4 | 2011-09-02 17:04:36 -0700 | [diff] [blame] | 266 | pid_t GetTid() const { |
| 267 | return tid_; |
| 268 | } |
Elliott Hughes | e27955c | 2011-08-26 15:21:24 -0700 | [diff] [blame] | 269 | |
| 270 | pthread_t GetImpl() const { |
| 271 | return handle_; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 272 | } |
| 273 | |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 274 | // Returns the Method* for the current method. |
| 275 | // This is used by the JNI implementation for logging and diagnostic purposes. |
| 276 | const Method* GetCurrentMethod() const { |
| 277 | return top_of_managed_stack_.GetMethod(); |
| 278 | } |
| 279 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 280 | bool IsExceptionPending() const { |
Elliott Hughes | b20a554 | 2011-08-12 18:03:12 -0700 | [diff] [blame] | 281 | return exception_ != NULL; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Elliott Hughes | e5b0dc8 | 2011-08-23 09:59:02 -0700 | [diff] [blame] | 284 | Throwable* GetException() const { |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 285 | DCHECK(CanAccessDirectReferences()); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 286 | return exception_; |
| 287 | } |
| 288 | |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 289 | void SetException(Throwable* new_exception) { |
| 290 | DCHECK(CanAccessDirectReferences()); |
| 291 | CHECK(new_exception != NULL); |
| 292 | // TODO: CHECK(exception_ == NULL); |
| 293 | exception_ = new_exception; // TODO |
| 294 | } |
| 295 | |
| 296 | void ClearException() { |
| 297 | exception_ = NULL; |
Elliott Hughes | a095764 | 2011-09-02 14:27:33 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 300 | Frame GetTopOfStack() const { |
| 301 | return top_of_managed_stack_; |
| 302 | } |
| 303 | |
| 304 | // TODO: this is here for testing, remove when we have exception unit tests |
| 305 | // that use the real stack |
| 306 | void SetTopOfStack(void* stack) { |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 307 | top_of_managed_stack_.SetSP(reinterpret_cast<Method**>(stack)); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Elliott Hughes | e5b0dc8 | 2011-08-23 09:59:02 -0700 | [diff] [blame] | 310 | void ThrowNewException(const char* exception_class_descriptor, const char* fmt, ...) |
Elliott Hughes | a5b897e | 2011-08-16 11:33:06 -0700 | [diff] [blame] | 311 | __attribute__ ((format(printf, 3, 4))); |
| 312 | |
Elliott Hughes | 79082e3 | 2011-08-25 12:07:32 -0700 | [diff] [blame] | 313 | // This exception is special, because we need to pre-allocate an instance. |
| 314 | void ThrowOutOfMemoryError(); |
| 315 | |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 316 | Frame FindExceptionHandler(void* throw_pc, void** handler_pc); |
| 317 | |
| 318 | void* FindExceptionHandlerInMethod(const Method* method, |
| 319 | void* throw_pc, |
| 320 | const DexFile& dex_file, |
| 321 | ClassLinker* class_linker); |
Shih-wei Liao | 668512a | 2011-09-01 14:18:34 -0700 | [diff] [blame] | 322 | static ThreadOffset SelfOffset() { |
| 323 | return ThreadOffset(OFFSETOF_MEMBER(Thread, self_)); |
| 324 | } |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 325 | |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 326 | // Offset of exception within Thread, used by generated code |
| 327 | static ThreadOffset ExceptionOffset() { |
| 328 | return ThreadOffset(OFFSETOF_MEMBER(Thread, exception_)); |
| 329 | } |
| 330 | |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 331 | // Offset of id within Thread, used by generated code |
| 332 | static ThreadOffset IdOffset() { |
| 333 | return ThreadOffset(OFFSETOF_MEMBER(Thread, id_)); |
| 334 | } |
| 335 | |
| 336 | // Offset of card_table within Thread, used by generated code |
| 337 | static ThreadOffset CardTableOffset() { |
| 338 | return ThreadOffset(OFFSETOF_MEMBER(Thread, card_table_)); |
| 339 | } |
| 340 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 341 | void SetName(const char* name); |
| 342 | |
| 343 | void Suspend(); |
| 344 | |
| 345 | bool IsSuspended(); |
| 346 | |
| 347 | void Resume(); |
| 348 | |
Elliott Hughes | c1674ed | 2011-08-25 18:09:09 -0700 | [diff] [blame] | 349 | static bool Startup(); |
| 350 | static void Shutdown(); |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 351 | |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 352 | static ThreadOffset SuspendCountOffset() { |
| 353 | return ThreadOffset(OFFSETOF_MEMBER(Thread, suspend_count_)); |
| 354 | } |
| 355 | |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 356 | // Offset of state within Thread, used by generated code |
| 357 | static ThreadOffset StateOffset() { |
| 358 | return ThreadOffset(OFFSETOF_MEMBER(Thread, state_)); |
| 359 | } |
| 360 | |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 361 | // JNI methods |
Elliott Hughes | 69f5bc6 | 2011-08-24 09:26:14 -0700 | [diff] [blame] | 362 | JNIEnvExt* GetJniEnv() const { |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 363 | return jni_env_; |
| 364 | } |
| 365 | |
| 366 | // Offset of JNI environment within Thread, used by generated code |
| 367 | static ThreadOffset JniEnvOffset() { |
| 368 | return ThreadOffset(OFFSETOF_MEMBER(Thread, jni_env_)); |
| 369 | } |
| 370 | |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 371 | // Offset of top of managed stack address, used by generated code |
| 372 | static ThreadOffset TopOfManagedStackOffset() { |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 373 | return ThreadOffset(OFFSETOF_MEMBER(Thread, top_of_managed_stack_) + |
| 374 | OFFSETOF_MEMBER(Frame, sp_)); |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 377 | // Offset of top stack indirect reference table within Thread, used by |
| 378 | // generated code |
| 379 | static ThreadOffset TopSirtOffset() { |
| 380 | return ThreadOffset(OFFSETOF_MEMBER(Thread, top_sirt_)); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 381 | } |
| 382 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 383 | // Number of references allocated in SIRTs on this thread |
| 384 | size_t NumSirtReferences(); |
Ian Rogers | a8cd9f4 | 2011-08-19 16:43:41 -0700 | [diff] [blame] | 385 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 386 | // Is the given obj in this thread's stack indirect reference table? |
| 387 | bool SirtContains(jobject obj); |
| 388 | |
| 389 | // Convert a jobject into a Object* |
| 390 | Object* DecodeJObject(jobject obj); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 391 | |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 392 | // Offset of exception_entry_point_ within Thread, used by generated code |
| 393 | static ThreadOffset ExceptionEntryPointOffset() { |
| 394 | return ThreadOffset(OFFSETOF_MEMBER(Thread, exception_entry_point_)); |
| 395 | } |
| 396 | |
| 397 | void RegisterExceptionEntryPoint(void (*handler)(Method**)) { |
| 398 | exception_entry_point_ = handler; |
| 399 | } |
| 400 | |
| 401 | // Offset of suspend_count_entry_point_ within Thread, used by generated code |
| 402 | static ThreadOffset SuspendCountEntryPointOffset() { |
| 403 | return ThreadOffset(OFFSETOF_MEMBER(Thread, suspend_count_entry_point_)); |
| 404 | } |
| 405 | |
| 406 | void RegisterSuspendCountEntryPoint(void (*handler)(Method**)) { |
| 407 | suspend_count_entry_point_ = handler; |
| 408 | } |
| 409 | |
| 410 | // Increasing the suspend count, will cause the thread to run to safepoint |
| 411 | void IncrementSuspendCount() { suspend_count_++; } |
| 412 | void DecrementSuspendCount() { suspend_count_--; } |
| 413 | |
Ian Rogers | 6de0860 | 2011-08-19 14:52:39 -0700 | [diff] [blame] | 414 | // Linked list recording transitions from native to managed code |
| 415 | void PushNativeToManagedRecord(NativeToManagedRecord* record) { |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 416 | record->last_top_of_managed_stack = reinterpret_cast<void*>(top_of_managed_stack_.GetSP()); |
Ian Rogers | 6de0860 | 2011-08-19 14:52:39 -0700 | [diff] [blame] | 417 | record->link = native_to_managed_record_; |
| 418 | native_to_managed_record_ = record; |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 419 | top_of_managed_stack_.SetSP(NULL); |
Ian Rogers | 6de0860 | 2011-08-19 14:52:39 -0700 | [diff] [blame] | 420 | } |
| 421 | void PopNativeToManagedRecord(const NativeToManagedRecord& record) { |
| 422 | native_to_managed_record_ = record.link; |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 423 | top_of_managed_stack_.SetSP(reinterpret_cast<Method**>(record.last_top_of_managed_stack)); |
Ian Rogers | 6de0860 | 2011-08-19 14:52:39 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Brian Carlstrom | bffb155 | 2011-08-25 12:23:53 -0700 | [diff] [blame] | 426 | const ClassLoader* GetClassLoaderOverride() { |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 427 | // TODO: need to place the class_loader_override_ in a handle |
| 428 | // DCHECK(CanAccessDirectReferences()); |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 429 | return class_loader_override_; |
| 430 | } |
| 431 | |
Brian Carlstrom | bffb155 | 2011-08-25 12:23:53 -0700 | [diff] [blame] | 432 | void SetClassLoaderOverride(const ClassLoader* class_loader_override) { |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 433 | class_loader_override_ = class_loader_override; |
| 434 | } |
| 435 | |
Shih-wei Liao | 4417536 | 2011-08-28 16:59:17 -0700 | [diff] [blame] | 436 | // Allocate stack trace |
Shih-wei Liao | 9b576b4 | 2011-08-29 01:45:07 -0700 | [diff] [blame] | 437 | ObjectArray<StackTraceElement>* AllocStackTrace(); |
Shih-wei Liao | 55df06b | 2011-08-26 14:39:27 -0700 | [diff] [blame] | 438 | |
Elliott Hughes | 410c0c8 | 2011-09-01 17:58:25 -0700 | [diff] [blame] | 439 | void VisitRoots(Heap::RootVisitor* visitor, void* arg) const; |
| 440 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 441 | private: |
Elliott Hughes | 40ef99e | 2011-08-11 17:44:34 -0700 | [diff] [blame] | 442 | Thread() |
Elliott Hughes | 330304d | 2011-08-12 14:28:05 -0700 | [diff] [blame] | 443 | : id_(1234), |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 444 | top_of_managed_stack_(), |
Ian Rogers | 6de0860 | 2011-08-19 14:52:39 -0700 | [diff] [blame] | 445 | native_to_managed_record_(NULL), |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 446 | top_sirt_(NULL), |
Elliott Hughes | 330304d | 2011-08-12 14:28:05 -0700 | [diff] [blame] | 447 | jni_env_(NULL), |
| 448 | exception_(NULL), |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 449 | suspend_count_(0), |
| 450 | class_loader_override_(NULL) { |
buzbee | 3ea4ec5 | 2011-08-22 17:37:19 -0700 | [diff] [blame] | 451 | InitFunctionPointers(); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 452 | } |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 453 | |
Elliott Hughes | c1674ed | 2011-08-25 18:09:09 -0700 | [diff] [blame] | 454 | ~Thread(); |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 455 | friend class Runtime; // For ~Thread. |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 456 | |
Elliott Hughes | d92bec4 | 2011-09-02 17:04:36 -0700 | [diff] [blame] | 457 | void DumpState(std::ostream& os) const; |
| 458 | void DumpStack(std::ostream& os) const; |
| 459 | |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 460 | void InitCpu(); |
buzbee | 3ea4ec5 | 2011-08-22 17:37:19 -0700 | [diff] [blame] | 461 | void InitFunctionPointers(); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 462 | |
Shih-wei Liao | 9b576b4 | 2011-08-29 01:45:07 -0700 | [diff] [blame] | 463 | void WalkStack(StackVisitor* visitor); |
Shih-wei Liao | 4417536 | 2011-08-28 16:59:17 -0700 | [diff] [blame] | 464 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 465 | // Managed thread id. |
| 466 | uint32_t id_; |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 467 | |
Elliott Hughes | d92bec4 | 2011-09-02 17:04:36 -0700 | [diff] [blame] | 468 | // System thread id. |
| 469 | pid_t tid_; |
| 470 | |
| 471 | // Native thread handle. |
| 472 | pthread_t handle_; |
| 473 | |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 474 | // FIXME: placeholder for the gc cardTable |
| 475 | uint32_t card_table_; |
| 476 | |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 477 | // Top of the managed stack, written out prior to the state transition from |
| 478 | // kRunnable to kNative. Uses include to give the starting point for scanning |
| 479 | // a managed stack when a thread is in native code. |
Shih-wei Liao | 1a18c8c | 2011-08-14 17:47:36 -0700 | [diff] [blame] | 480 | Frame top_of_managed_stack_; |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 481 | |
Ian Rogers | 6de0860 | 2011-08-19 14:52:39 -0700 | [diff] [blame] | 482 | // A linked list (of stack allocated records) recording transitions from |
| 483 | // native to managed code. |
| 484 | NativeToManagedRecord* native_to_managed_record_; |
| 485 | |
Ian Rogers | 408f79a | 2011-08-23 18:22:33 -0700 | [diff] [blame] | 486 | // Top of linked list of stack indirect reference tables or NULL for none |
| 487 | StackIndirectReferenceTable* top_sirt_; |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 488 | |
| 489 | // Every thread may have an associated JNI environment |
Elliott Hughes | 69f5bc6 | 2011-08-24 09:26:14 -0700 | [diff] [blame] | 490 | JNIEnvExt* jni_env_; |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 491 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 492 | State state_; |
| 493 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 494 | // Initialized to "this". On certain architectures (such as x86) reading |
| 495 | // off of Thread::Current is easy but getting the address of Thread::Current |
| 496 | // is hard. This field can be read off of Thread::Current to give the address. |
| 497 | Thread* self_; |
| 498 | |
| 499 | Runtime* runtime_; |
| 500 | |
| 501 | // The pending exception or NULL. |
Elliott Hughes | e5b0dc8 | 2011-08-23 09:59:02 -0700 | [diff] [blame] | 502 | Throwable* exception_; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 503 | |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 504 | // A non-zero value is used to tell the current thread to enter a safe point |
| 505 | // at the next poll. |
| 506 | int suspend_count_; |
| 507 | |
Elliott Hughes | edcc09c | 2011-08-21 18:47:05 -0700 | [diff] [blame] | 508 | // Needed to get the right ClassLoader in JNI_OnLoad, but also |
| 509 | // useful for testing. |
Brian Carlstrom | bffb155 | 2011-08-25 12:23:53 -0700 | [diff] [blame] | 510 | const ClassLoader* class_loader_override_; |
buzbee | c143c55 | 2011-08-20 17:38:58 -0700 | [diff] [blame] | 511 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 512 | // TLS key used to retrieve the VM thread object. |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 513 | static pthread_key_t pthread_key_self_; |
| 514 | |
Ian Rogers | 45a76cb | 2011-07-21 22:00:15 -0700 | [diff] [blame] | 515 | // Entry point called when exception_ is set |
| 516 | void (*exception_entry_point_)(Method** frame); |
| 517 | |
| 518 | // Entry point called when suspend_count_ is non-zero |
| 519 | void (*suspend_count_entry_point_)(Method** frame); |
| 520 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 521 | DISALLOW_COPY_AND_ASSIGN(Thread); |
| 522 | }; |
Elliott Hughes | 330304d | 2011-08-12 14:28:05 -0700 | [diff] [blame] | 523 | std::ostream& operator<<(std::ostream& os, const Thread& thread); |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 524 | std::ostream& operator<<(std::ostream& os, const Thread::State& state); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 525 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 526 | class ThreadList { |
| 527 | public: |
Carl Shapiro | 61e019d | 2011-07-14 16:53:09 -0700 | [diff] [blame] | 528 | static const int kMaxId = 0xFFFF; |
| 529 | static const int kInvalidId = 0; |
| 530 | static const int kMainId = 1; |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 531 | |
Carl Shapiro | 61e019d | 2011-07-14 16:53:09 -0700 | [diff] [blame] | 532 | static ThreadList* Create(); |
| 533 | |
| 534 | ~ThreadList(); |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 535 | |
Elliott Hughes | d92bec4 | 2011-09-02 17:04:36 -0700 | [diff] [blame] | 536 | void Dump(std::ostream& os); |
| 537 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 538 | void Register(Thread* thread); |
| 539 | |
| 540 | void Unregister(Thread* thread); |
| 541 | |
Elliott Hughes | c1674ed | 2011-08-25 18:09:09 -0700 | [diff] [blame] | 542 | bool Contains(Thread* thread); |
| 543 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 544 | void Lock() { |
| 545 | lock_->Lock(); |
| 546 | } |
| 547 | |
| 548 | void Unlock() { |
| 549 | lock_->Unlock(); |
| 550 | }; |
| 551 | |
Elliott Hughes | 410c0c8 | 2011-09-01 17:58:25 -0700 | [diff] [blame] | 552 | void VisitRoots(Heap::RootVisitor* visitor, void* arg) const; |
| 553 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 554 | private: |
| 555 | ThreadList(); |
| 556 | |
| 557 | std::list<Thread*> list_; |
| 558 | |
| 559 | Mutex* lock_; |
| 560 | |
| 561 | DISALLOW_COPY_AND_ASSIGN(ThreadList); |
| 562 | }; |
| 563 | |
| 564 | class ThreadListLock { |
| 565 | public: |
| 566 | ThreadListLock(ThreadList* thread_list, Thread* current_thread) |
| 567 | : thread_list_(thread_list) { |
| 568 | if (current_thread == NULL) { // try to get it from TLS |
| 569 | current_thread = Thread::Current(); |
| 570 | } |
| 571 | Thread::State old_state; |
| 572 | if (current_thread != NULL) { |
Elliott Hughes | ad7c2a3 | 2011-08-31 11:58:10 -0700 | [diff] [blame] | 573 | old_state = current_thread->SetState(Thread::kWaiting); // TODO: VMWAIT |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 574 | } else { |
| 575 | // happens during VM shutdown |
| 576 | old_state = Thread::kUnknown; // TODO: something else |
| 577 | } |
| 578 | thread_list_->Lock(); |
| 579 | if (current_thread != NULL) { |
| 580 | current_thread->SetState(old_state); |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | ~ThreadListLock() { |
| 585 | thread_list_->Unlock(); |
| 586 | } |
| 587 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 588 | private: |
| 589 | ThreadList* thread_list_; |
| 590 | |
| 591 | DISALLOW_COPY_AND_ASSIGN(ThreadListLock); |
| 592 | }; |
| 593 | |
Elliott Hughes | ad7c2a3 | 2011-08-31 11:58:10 -0700 | [diff] [blame] | 594 | class ScopedThreadStateChange { |
| 595 | public: |
| 596 | ScopedThreadStateChange(Thread* thread, Thread::State new_state) : thread_(thread) { |
| 597 | old_thread_state_ = thread_->SetState(new_state); |
| 598 | } |
| 599 | |
| 600 | ~ScopedThreadStateChange() { |
| 601 | thread_->SetState(old_thread_state_); |
| 602 | } |
| 603 | |
| 604 | private: |
| 605 | Thread* thread_; |
| 606 | Thread::State old_thread_state_; |
| 607 | DISALLOW_COPY_AND_ASSIGN(ScopedThreadStateChange); |
| 608 | }; |
| 609 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 610 | } // namespace art |
| 611 | |
| 612 | #endif // ART_SRC_THREAD_H_ |