1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/vm_operations.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,366 @@
1.4 +/*
1.5 + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// The following classes are used for operations
1.29 +// initiated by a Java thread but that must
1.30 +// take place in the VMThread.
1.31 +
1.32 +#define VM_OP_ENUM(type) VMOp_##type,
1.33 +
1.34 +// Note: When new VM_XXX comes up, add 'XXX' to the template table.
1.35 +#define VM_OPS_DO(template) \
1.36 + template(Dummy) \
1.37 + template(ThreadStop) \
1.38 + template(ThreadDump) \
1.39 + template(PrintThreads) \
1.40 + template(FindDeadlocks) \
1.41 + template(ForceSafepoint) \
1.42 + template(ForceAsyncSafepoint) \
1.43 + template(Deoptimize) \
1.44 + template(DeoptimizeFrame) \
1.45 + template(DeoptimizeAll) \
1.46 + template(ZombieAll) \
1.47 + template(Verify) \
1.48 + template(PrintJNI) \
1.49 + template(HeapDumper) \
1.50 + template(DeoptimizeTheWorld) \
1.51 + template(GC_HeapInspection) \
1.52 + template(GenCollectFull) \
1.53 + template(GenCollectFullConcurrent) \
1.54 + template(GenCollectForAllocation) \
1.55 + template(ParallelGCFailedAllocation) \
1.56 + template(ParallelGCFailedPermanentAllocation) \
1.57 + template(ParallelGCSystemGC) \
1.58 + template(CMS_Initial_Mark) \
1.59 + template(CMS_Final_Remark) \
1.60 + template(EnableBiasedLocking) \
1.61 + template(RevokeBias) \
1.62 + template(BulkRevokeBias) \
1.63 + template(PopulateDumpSharedSpace) \
1.64 + template(JNIFunctionTableCopier) \
1.65 + template(RedefineClasses) \
1.66 + template(GetOwnedMonitorInfo) \
1.67 + template(GetObjectMonitorUsage) \
1.68 + template(GetCurrentContendedMonitor) \
1.69 + template(GetStackTrace) \
1.70 + template(GetMultipleStackTraces) \
1.71 + template(GetAllStackTraces) \
1.72 + template(GetThreadListStackTraces) \
1.73 + template(GetFrameCount) \
1.74 + template(GetFrameLocation) \
1.75 + template(ChangeBreakpoints) \
1.76 + template(GetOrSetLocal) \
1.77 + template(GetCurrentLocation) \
1.78 + template(EnterInterpOnlyMode) \
1.79 + template(ChangeSingleStep) \
1.80 + template(HeapWalkOperation) \
1.81 + template(HeapIterateOperation) \
1.82 + template(ReportJavaOutOfMemory) \
1.83 + template(Exit) \
1.84 +
1.85 +class VM_Operation: public CHeapObj {
1.86 + public:
1.87 + enum Mode {
1.88 + _safepoint, // blocking, safepoint, vm_op C-heap allocated
1.89 + _no_safepoint, // blocking, no safepoint, vm_op C-Heap allocated
1.90 + _concurrent, // non-blocking, no safepoint, vm_op C-Heap allocated
1.91 + _async_safepoint // non-blocking, safepoint, vm_op C-Heap allocated
1.92 + };
1.93 +
1.94 + enum VMOp_Type {
1.95 + VM_OPS_DO(VM_OP_ENUM)
1.96 + VMOp_Terminating
1.97 + };
1.98 +
1.99 + private:
1.100 + Thread* _calling_thread;
1.101 + ThreadPriority _priority;
1.102 + long _timestamp;
1.103 + VM_Operation* _next;
1.104 + VM_Operation* _prev;
1.105 +
1.106 + // The VM operation name array
1.107 + static const char* _names[];
1.108 +
1.109 + public:
1.110 + VM_Operation() { _calling_thread = NULL; _next = NULL; _prev = NULL; }
1.111 + virtual ~VM_Operation() {}
1.112 +
1.113 + // VM operation support (used by VM thread)
1.114 + Thread* calling_thread() const { return _calling_thread; }
1.115 + ThreadPriority priority() { return _priority; }
1.116 + void set_calling_thread(Thread* thread, ThreadPriority priority);
1.117 +
1.118 + long timestamp() const { return _timestamp; }
1.119 + void set_timestamp(long timestamp) { _timestamp = timestamp; }
1.120 +
1.121 + // Called by VM thread - does in turn invoke doit(). Do not override this
1.122 + void evaluate();
1.123 +
1.124 + // evaluate() is called by the VMThread and in turn calls doit().
1.125 + // If the thread invoking VMThread::execute((VM_Operation*) is a JavaThread,
1.126 + // doit_prologue() is called in that thread before transferring control to
1.127 + // the VMThread.
1.128 + // If doit_prologue() returns true the VM operation will proceed, and
1.129 + // doit_epilogue() will be called by the JavaThread once the VM operation
1.130 + // completes. If doit_prologue() returns false the VM operation is cancelled.
1.131 + virtual void doit() = 0;
1.132 + virtual bool doit_prologue() { return true; };
1.133 + virtual void doit_epilogue() {}; // Note: Not called if mode is: _concurrent
1.134 +
1.135 + // Type test
1.136 + virtual bool is_methodCompiler() const { return false; }
1.137 +
1.138 + // Linking
1.139 + VM_Operation *next() const { return _next; }
1.140 + VM_Operation *prev() const { return _prev; }
1.141 + void set_next(VM_Operation *next) { _next = next; }
1.142 + void set_prev(VM_Operation *prev) { _prev = prev; }
1.143 +
1.144 + // Configuration. Override these appropriatly in subclasses.
1.145 + virtual VMOp_Type type() const = 0;
1.146 + virtual Mode evaluation_mode() const { return _safepoint; }
1.147 + virtual bool allow_nested_vm_operations() const { return false; }
1.148 + virtual bool is_cheap_allocated() const { return false; }
1.149 + virtual void oops_do(OopClosure* f) { /* do nothing */ };
1.150 +
1.151 + // CAUTION: <don't hang yourself with following rope>
1.152 + // If you override these methods, make sure that the evaluation
1.153 + // of these methods is race-free and non-blocking, since these
1.154 + // methods may be evaluated either by the mutators or by the
1.155 + // vm thread, either concurrently with mutators or with the mutators
1.156 + // stopped. In other words, taking locks is verboten, and if there
1.157 + // are any races in evaluating the conditions, they'd better be benign.
1.158 + virtual bool evaluate_at_safepoint() const {
1.159 + return evaluation_mode() == _safepoint ||
1.160 + evaluation_mode() == _async_safepoint;
1.161 + }
1.162 + virtual bool evaluate_concurrently() const {
1.163 + return evaluation_mode() == _concurrent ||
1.164 + evaluation_mode() == _async_safepoint;
1.165 + }
1.166 +
1.167 + // Debugging
1.168 + void print_on_error(outputStream* st) const;
1.169 + const char* name() const { return _names[type()]; }
1.170 + static const char* name(int type) {
1.171 + assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type");
1.172 + return _names[type];
1.173 + }
1.174 +#ifndef PRODUCT
1.175 + void print_on(outputStream* st) const { print_on_error(st); }
1.176 +#endif
1.177 +};
1.178 +
1.179 +class VM_ThreadStop: public VM_Operation {
1.180 + private:
1.181 + oop _thread; // The Thread that the Throwable is thrown against
1.182 + oop _throwable; // The Throwable thrown at the target Thread
1.183 + public:
1.184 + // All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the
1.185 + // VM operation is executed.
1.186 + VM_ThreadStop(oop thread, oop throwable) {
1.187 + _thread = thread;
1.188 + _throwable = throwable;
1.189 + }
1.190 + VMOp_Type type() const { return VMOp_ThreadStop; }
1.191 + oop target_thread() const { return _thread; }
1.192 + oop throwable() const { return _throwable;}
1.193 + void doit();
1.194 + // We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated
1.195 + bool allow_nested_vm_operations() const { return true; }
1.196 + Mode evaluation_mode() const { return _async_safepoint; }
1.197 + bool is_cheap_allocated() const { return true; }
1.198 +
1.199 + // GC support
1.200 + void oops_do(OopClosure* f) {
1.201 + f->do_oop(&_thread); f->do_oop(&_throwable);
1.202 + }
1.203 +};
1.204 +
1.205 +// dummy vm op, evaluated just to force a safepoint
1.206 +class VM_ForceSafepoint: public VM_Operation {
1.207 + public:
1.208 + VM_ForceSafepoint() {}
1.209 + void doit() {}
1.210 + VMOp_Type type() const { return VMOp_ForceSafepoint; }
1.211 +};
1.212 +
1.213 +// dummy vm op, evaluated just to force a safepoint
1.214 +class VM_ForceAsyncSafepoint: public VM_Operation {
1.215 + public:
1.216 + VM_ForceAsyncSafepoint() {}
1.217 + void doit() {}
1.218 + VMOp_Type type() const { return VMOp_ForceAsyncSafepoint; }
1.219 + Mode evaluation_mode() const { return _async_safepoint; }
1.220 + bool is_cheap_allocated() const { return true; }
1.221 +};
1.222 +
1.223 +class VM_Deoptimize: public VM_Operation {
1.224 + public:
1.225 + VM_Deoptimize() {}
1.226 + VMOp_Type type() const { return VMOp_Deoptimize; }
1.227 + void doit();
1.228 + bool allow_nested_vm_operations() const { return true; }
1.229 +};
1.230 +
1.231 +class VM_DeoptimizeFrame: public VM_Operation {
1.232 + private:
1.233 + JavaThread* _thread;
1.234 + intptr_t* _id;
1.235 + public:
1.236 + VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id);
1.237 + VMOp_Type type() const { return VMOp_DeoptimizeFrame; }
1.238 + void doit();
1.239 + bool allow_nested_vm_operations() const { return true; }
1.240 +};
1.241 +
1.242 +#ifndef PRODUCT
1.243 +class VM_DeoptimizeAll: public VM_Operation {
1.244 + private:
1.245 + KlassHandle _dependee;
1.246 + public:
1.247 + VM_DeoptimizeAll() {}
1.248 + VMOp_Type type() const { return VMOp_DeoptimizeAll; }
1.249 + void doit();
1.250 + bool allow_nested_vm_operations() const { return true; }
1.251 +};
1.252 +
1.253 +
1.254 +class VM_ZombieAll: public VM_Operation {
1.255 + public:
1.256 + VM_ZombieAll() {}
1.257 + VMOp_Type type() const { return VMOp_ZombieAll; }
1.258 + void doit();
1.259 + bool allow_nested_vm_operations() const { return true; }
1.260 +};
1.261 +#endif // PRODUCT
1.262 +
1.263 +class VM_Verify: public VM_Operation {
1.264 + private:
1.265 + KlassHandle _dependee;
1.266 + public:
1.267 + VM_Verify() {}
1.268 + VMOp_Type type() const { return VMOp_Verify; }
1.269 + void doit();
1.270 +};
1.271 +
1.272 +
1.273 +class VM_PrintThreads: public VM_Operation {
1.274 + private:
1.275 + outputStream* _out;
1.276 + bool _print_concurrent_locks;
1.277 + public:
1.278 + VM_PrintThreads() { _out = tty; _print_concurrent_locks = PrintConcurrentLocks; }
1.279 + VM_PrintThreads(outputStream* out, bool print_concurrent_locks) { _out = out; _print_concurrent_locks = print_concurrent_locks; }
1.280 + VMOp_Type type() const { return VMOp_PrintThreads; }
1.281 + void doit();
1.282 + bool doit_prologue();
1.283 + void doit_epilogue();
1.284 +};
1.285 +
1.286 +class VM_PrintJNI: public VM_Operation {
1.287 + private:
1.288 + outputStream* _out;
1.289 + public:
1.290 + VM_PrintJNI() { _out = tty; }
1.291 + VM_PrintJNI(outputStream* out) { _out = out; }
1.292 + VMOp_Type type() const { return VMOp_PrintJNI; }
1.293 + void doit();
1.294 +};
1.295 +
1.296 +class DeadlockCycle;
1.297 +class VM_FindDeadlocks: public VM_Operation {
1.298 + private:
1.299 + bool _concurrent_locks;
1.300 + DeadlockCycle* _deadlocks;
1.301 + outputStream* _out;
1.302 +
1.303 + public:
1.304 + VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _out(NULL), _deadlocks(NULL) {};
1.305 + VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _out(st), _deadlocks(NULL) {};
1.306 + ~VM_FindDeadlocks();
1.307 +
1.308 + DeadlockCycle* result() { return _deadlocks; };
1.309 + VMOp_Type type() const { return VMOp_FindDeadlocks; }
1.310 + void doit();
1.311 + bool doit_prologue();
1.312 +};
1.313 +
1.314 +class ThreadDumpResult;
1.315 +class ThreadSnapshot;
1.316 +class ThreadConcurrentLocks;
1.317 +
1.318 +class VM_ThreadDump : public VM_Operation {
1.319 + private:
1.320 + ThreadDumpResult* _result;
1.321 + int _num_threads;
1.322 + GrowableArray<instanceHandle>* _threads;
1.323 + int _max_depth;
1.324 + bool _with_locked_monitors;
1.325 + bool _with_locked_synchronizers;
1.326 +
1.327 + ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl);
1.328 +
1.329 + public:
1.330 + VM_ThreadDump(ThreadDumpResult* result,
1.331 + int max_depth, // -1 indicates entire stack
1.332 + bool with_locked_monitors,
1.333 + bool with_locked_synchronizers);
1.334 +
1.335 + VM_ThreadDump(ThreadDumpResult* result,
1.336 + GrowableArray<instanceHandle>* threads,
1.337 + int num_threads, // -1 indicates entire stack
1.338 + int max_depth,
1.339 + bool with_locked_monitors,
1.340 + bool with_locked_synchronizers);
1.341 +
1.342 + VMOp_Type type() const { return VMOp_ThreadDump; }
1.343 + void doit();
1.344 + bool doit_prologue();
1.345 + void doit_epilogue();
1.346 +};
1.347 +
1.348 +
1.349 +class VM_Exit: public VM_Operation {
1.350 + private:
1.351 + int _exit_code;
1.352 + static volatile bool _vm_exited;
1.353 + static Thread * _shutdown_thread;
1.354 + static void wait_if_vm_exited();
1.355 + public:
1.356 + VM_Exit(int exit_code) {
1.357 + _exit_code = exit_code;
1.358 + }
1.359 + static int wait_for_threads_in_native_to_block();
1.360 + static int set_vm_exited();
1.361 + static bool vm_exited() { return _vm_exited; }
1.362 + static void block_if_vm_exited() {
1.363 + if (_vm_exited) {
1.364 + wait_if_vm_exited();
1.365 + }
1.366 + }
1.367 + VMOp_Type type() const { return VMOp_Exit; }
1.368 + void doit();
1.369 +};
