Tue, 26 Apr 2011 14:04:43 -0400
7009923: JSR 292: VM crash in JavaThread::last_frame
Summary: Handle stack overflow before the first frame is called, by printing out the called method and not walking the stack.
Reviewed-by: dholmes, phh, dsamersoff
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
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23 */
25 #ifndef SHARE_VM_RUNTIME_MUTEXLOCKER_HPP
26 #define SHARE_VM_RUNTIME_MUTEXLOCKER_HPP
28 #include "memory/allocation.hpp"
29 #include "runtime/mutex.hpp"
30 #ifdef TARGET_OS_FAMILY_linux
31 # include "os_linux.inline.hpp"
32 #endif
33 #ifdef TARGET_OS_FAMILY_solaris
34 # include "os_solaris.inline.hpp"
35 #endif
36 #ifdef TARGET_OS_FAMILY_windows
37 # include "os_windows.inline.hpp"
38 #endif
40 // Mutexes used in the VM.
42 extern Mutex* Patching_lock; // a lock used to guard code patching of compiled code
43 extern Monitor* SystemDictionary_lock; // a lock on the system dictonary
44 extern Mutex* PackageTable_lock; // a lock on the class loader package table
45 extern Mutex* CompiledIC_lock; // a lock used to guard compiled IC patching and access
46 extern Mutex* InlineCacheBuffer_lock; // a lock used to guard the InlineCacheBuffer
47 extern Mutex* VMStatistic_lock; // a lock used to guard statistics count increment
48 extern Mutex* JNIGlobalHandle_lock; // a lock on creating JNI global handles
49 extern Mutex* JNIHandleBlockFreeList_lock; // a lock on the JNI handle block free list
50 extern Mutex* JNICachedItableIndex_lock; // a lock on caching an itable index during JNI invoke
51 extern Mutex* JmethodIdCreation_lock; // a lock on creating JNI method identifiers
52 extern Mutex* JfieldIdCreation_lock; // a lock on creating JNI static field identifiers
53 extern Monitor* JNICritical_lock; // a lock used while entering and exiting JNI critical regions, allows GC to sometimes get in
54 extern Mutex* JvmtiThreadState_lock; // a lock on modification of JVMTI thread data
55 extern Monitor* JvmtiPendingEvent_lock; // a lock on the JVMTI pending events list
56 extern Monitor* Heap_lock; // a lock on the heap
57 extern Mutex* ExpandHeap_lock; // a lock on expanding the heap
58 extern Mutex* AdapterHandlerLibrary_lock; // a lock on the AdapterHandlerLibrary
59 extern Mutex* SignatureHandlerLibrary_lock; // a lock on the SignatureHandlerLibrary
60 extern Mutex* VtableStubs_lock; // a lock on the VtableStubs
61 extern Mutex* SymbolTable_lock; // a lock on the symbol table
62 extern Mutex* StringTable_lock; // a lock on the interned string table
63 extern Mutex* CodeCache_lock; // a lock on the CodeCache, rank is special, use MutexLockerEx
64 extern Mutex* MethodData_lock; // a lock on installation of method data
65 extern Mutex* RetData_lock; // a lock on installation of RetData inside method data
66 extern Mutex* DerivedPointerTableGC_lock; // a lock to protect the derived pointer table
67 extern Monitor* VMOperationQueue_lock; // a lock on queue of vm_operations waiting to execute
68 extern Monitor* VMOperationRequest_lock; // a lock on Threads waiting for a vm_operation to terminate
69 extern Monitor* Safepoint_lock; // a lock used by the safepoint abstraction
70 extern Monitor* Threads_lock; // a lock on the Threads table of active Java threads
71 // (also used by Safepoints too to block threads creation/destruction)
72 extern Monitor* CGC_lock; // used for coordination between
73 // fore- & background GC threads.
74 extern Mutex* STS_init_lock; // coordinate initialization of SuspendibleThreadSets.
75 extern Monitor* SLT_lock; // used in CMS GC for acquiring PLL
76 extern Monitor* iCMS_lock; // CMS incremental mode start/stop notification
77 extern Monitor* FullGCCount_lock; // in support of "concurrent" full gc
78 extern Monitor* CMark_lock; // used for concurrent mark thread coordination
79 extern Mutex* CMRegionStack_lock; // used for protecting accesses to the CM region stack
80 extern Mutex* SATB_Q_FL_lock; // Protects SATB Q
81 // buffer free list.
82 extern Monitor* SATB_Q_CBL_mon; // Protects SATB Q
83 // completed buffer queue.
84 extern Mutex* Shared_SATB_Q_lock; // Lock protecting SATB
85 // queue shared by
86 // non-Java threads.
88 extern Mutex* DirtyCardQ_FL_lock; // Protects dirty card Q
89 // buffer free list.
90 extern Monitor* DirtyCardQ_CBL_mon; // Protects dirty card Q
91 // completed buffer queue.
92 extern Mutex* Shared_DirtyCardQ_lock; // Lock protecting dirty card
93 // queue shared by
94 // non-Java threads.
95 // (see option ExplicitGCInvokesConcurrent)
96 extern Mutex* ParGCRareEvent_lock; // Synchronizes various (rare) parallel GC ops.
97 extern Mutex* EvacFailureStack_lock; // guards the evac failure scan stack
98 extern Mutex* Compile_lock; // a lock held when Compilation is updating code (used to block CodeCache traversal, CHA updates, etc)
99 extern Monitor* MethodCompileQueue_lock; // a lock held when method compilations are enqueued, dequeued
100 extern Monitor* CompileThread_lock; // a lock held by compile threads during compilation system initialization
101 extern Mutex* CompileTaskAlloc_lock; // a lock held when CompileTasks are allocated
102 extern Mutex* CompileStatistics_lock; // a lock held when updating compilation statistics
103 extern Mutex* MultiArray_lock; // a lock used to guard allocation of multi-dim arrays
104 extern Monitor* Terminator_lock; // a lock used to guard termination of the vm
105 extern Monitor* BeforeExit_lock; // a lock used to guard cleanups and shutdown hooks
106 extern Monitor* Notify_lock; // a lock used to synchronize the start-up of the vm
107 extern Monitor* Interrupt_lock; // a lock used for condition variable mediated interrupt processing
108 extern Monitor* ProfileVM_lock; // a lock used for profiling the VMThread
109 extern Mutex* ProfilePrint_lock; // a lock used to serialize the printing of profiles
110 extern Mutex* ExceptionCache_lock; // a lock used to synchronize exception cache updates
111 extern Mutex* OsrList_lock; // a lock used to serialize access to OSR queues
113 #ifndef PRODUCT
114 extern Mutex* FullGCALot_lock; // a lock to make FullGCALot MT safe
115 #endif
116 extern Mutex* Debug1_lock; // A bunch of pre-allocated locks that can be used for tracing
117 extern Mutex* Debug2_lock; // down synchronization related bugs!
118 extern Mutex* Debug3_lock;
120 extern Mutex* RawMonitor_lock;
121 extern Mutex* PerfDataMemAlloc_lock; // a lock on the allocator for PerfData memory for performance data
122 extern Mutex* PerfDataManager_lock; // a long on access to PerfDataManager resources
123 extern Mutex* ParkerFreeList_lock;
124 extern Mutex* OopMapCacheAlloc_lock; // protects allocation of oop_map caches
126 extern Mutex* FreeList_lock; // protects the free region list during safepoints
127 extern Monitor* SecondaryFreeList_lock; // protects the secondary free region list
128 extern Mutex* OldSets_lock; // protects the old region sets
129 extern Mutex* MMUTracker_lock; // protects the MMU
130 // tracker data structures
131 extern Mutex* HotCardCache_lock; // protects the hot card cache
133 extern Mutex* Management_lock; // a lock used to serialize JVM management
134 extern Monitor* Service_lock; // a lock used for service thread operation
136 // A MutexLocker provides mutual exclusion with respect to a given mutex
137 // for the scope which contains the locker. The lock is an OS lock, not
138 // an object lock, and the two do not interoperate. Do not use Mutex-based
139 // locks to lock on Java objects, because they will not be respected if a
140 // that object is locked using the Java locking mechanism.
141 //
142 // NOTE WELL!!
143 //
144 // See orderAccess.hpp. We assume throughout the VM that MutexLocker's
145 // and friends constructors do a fence, a lock and an acquire *in that
146 // order*. And that their destructors do a release and unlock, in *that*
147 // order. If their implementations change such that these assumptions
148 // are violated, a whole lot of code will break.
150 // Print all mutexes/monitors that are currently owned by a thread; called
151 // by fatal error handler.
152 void print_owned_locks_on_error(outputStream* st);
154 char *lock_name(Mutex *mutex);
156 class MutexLocker: StackObj {
157 private:
158 Monitor * _mutex;
159 public:
160 MutexLocker(Monitor * mutex) {
161 assert(mutex->rank() != Mutex::special,
162 "Special ranked mutex should only use MutexLockerEx");
163 _mutex = mutex;
164 _mutex->lock();
165 }
167 // Overloaded constructor passing current thread
168 MutexLocker(Monitor * mutex, Thread *thread) {
169 assert(mutex->rank() != Mutex::special,
170 "Special ranked mutex should only use MutexLockerEx");
171 _mutex = mutex;
172 _mutex->lock(thread);
173 }
175 ~MutexLocker() {
176 _mutex->unlock();
177 }
179 };
181 // for debugging: check that we're already owning this lock (or are at a safepoint)
182 #ifdef ASSERT
183 void assert_locked_or_safepoint(const Monitor * lock);
184 void assert_lock_strong(const Monitor * lock);
185 #else
186 #define assert_locked_or_safepoint(lock)
187 #define assert_lock_strong(lock)
188 #endif
190 // A MutexLockerEx behaves like a MutexLocker when its constructor is
191 // called with a Mutex. Unlike a MutexLocker, its constructor can also be
192 // called with NULL, in which case the MutexLockerEx is a no-op. There
193 // is also a corresponding MutexUnlockerEx. We want to keep the
194 // basic MutexLocker as fast as possible. MutexLockerEx can also lock
195 // without safepoint check.
197 class MutexLockerEx: public StackObj {
198 private:
199 Monitor * _mutex;
200 public:
201 MutexLockerEx(Monitor * mutex, bool no_safepoint_check = !Mutex::_no_safepoint_check_flag) {
202 _mutex = mutex;
203 if (_mutex != NULL) {
204 assert(mutex->rank() > Mutex::special || no_safepoint_check,
205 "Mutexes with rank special or lower should not do safepoint checks");
206 if (no_safepoint_check)
207 _mutex->lock_without_safepoint_check();
208 else
209 _mutex->lock();
210 }
211 }
213 ~MutexLockerEx() {
214 if (_mutex != NULL) {
215 _mutex->unlock();
216 }
217 }
218 };
220 // A MonitorLockerEx is like a MutexLockerEx above, except it takes
221 // a possibly null Monitor, and allows wait/notify as well which are
222 // delegated to the underlying Monitor.
224 class MonitorLockerEx: public MutexLockerEx {
225 private:
226 Monitor * _monitor;
227 public:
228 MonitorLockerEx(Monitor* monitor,
229 bool no_safepoint_check = !Mutex::_no_safepoint_check_flag):
230 MutexLockerEx(monitor, no_safepoint_check),
231 _monitor(monitor) {
232 // Superclass constructor did locking
233 }
235 ~MonitorLockerEx() {
236 #ifdef ASSERT
237 if (_monitor != NULL) {
238 assert_lock_strong(_monitor);
239 }
240 #endif // ASSERT
241 // Superclass destructor will do unlocking
242 }
244 bool wait(bool no_safepoint_check = !Mutex::_no_safepoint_check_flag,
245 long timeout = 0,
246 bool as_suspend_equivalent = !Mutex::_as_suspend_equivalent_flag) {
247 if (_monitor != NULL) {
248 return _monitor->wait(no_safepoint_check, timeout, as_suspend_equivalent);
249 }
250 return false;
251 }
253 bool notify_all() {
254 if (_monitor != NULL) {
255 return _monitor->notify_all();
256 }
257 return true;
258 }
260 bool notify() {
261 if (_monitor != NULL) {
262 return _monitor->notify();
263 }
264 return true;
265 }
266 };
270 // A GCMutexLocker is usually initialized with a mutex that is
271 // automatically acquired in order to do GC. The function that
272 // synchronizes using a GCMutexLocker may be called both during and between
273 // GC's. Thus, it must acquire the mutex if GC is not in progress, but not
274 // if GC is in progress (since the mutex is already held on its behalf.)
276 class GCMutexLocker: public StackObj {
277 private:
278 Monitor * _mutex;
279 bool _locked;
280 public:
281 GCMutexLocker(Monitor * mutex);
282 ~GCMutexLocker() { if (_locked) _mutex->unlock(); }
283 };
287 // A MutexUnlocker temporarily exits a previously
288 // entered mutex for the scope which contains the unlocker.
290 class MutexUnlocker: StackObj {
291 private:
292 Monitor * _mutex;
294 public:
295 MutexUnlocker(Monitor * mutex) {
296 _mutex = mutex;
297 _mutex->unlock();
298 }
300 ~MutexUnlocker() {
301 _mutex->lock();
302 }
303 };
305 // A MutexUnlockerEx temporarily exits a previously
306 // entered mutex for the scope which contains the unlocker.
308 class MutexUnlockerEx: StackObj {
309 private:
310 Monitor * _mutex;
311 bool _no_safepoint_check;
313 public:
314 MutexUnlockerEx(Monitor * mutex, bool no_safepoint_check = !Mutex::_no_safepoint_check_flag) {
315 _mutex = mutex;
316 _no_safepoint_check = no_safepoint_check;
317 _mutex->unlock();
318 }
320 ~MutexUnlockerEx() {
321 if (_no_safepoint_check == Mutex::_no_safepoint_check_flag) {
322 _mutex->lock_without_safepoint_check();
323 } else {
324 _mutex->lock();
325 }
326 }
327 };
329 #ifndef PRODUCT
330 //
331 // A special MutexLocker that allows:
332 // - reentrant locking
333 // - locking out of order
334 //
335 // Only too be used for verify code, where we can relaxe out dead-lock
336 // dection code a bit (unsafe, but probably ok). This code is NEVER to
337 // be included in a product version.
338 //
339 class VerifyMutexLocker: StackObj {
340 private:
341 Monitor * _mutex;
342 bool _reentrant;
343 public:
344 VerifyMutexLocker(Monitor * mutex) {
345 _mutex = mutex;
346 _reentrant = mutex->owned_by_self();
347 if (!_reentrant) {
348 // We temp. diable strict safepoint checking, while we require the lock
349 FlagSetting fs(StrictSafepointChecks, false);
350 _mutex->lock();
351 }
352 }
354 ~VerifyMutexLocker() {
355 if (!_reentrant) {
356 _mutex->unlock();
357 }
358 }
359 };
361 #endif
363 #endif // SHARE_VM_RUNTIME_MUTEXLOCKER_HPP