Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiImpl.hpp @ 2125:7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
Summary: Make JvmtiGCMark safe to run non-safepoint and instrument CMS
Reviewed-by: ysr, dcubed
| author | kamg |
|---|---|
| date | Mon, 10 Jan 2011 17:14:53 -0500 |
| parents | 09b4dd4f152b |
| children | 9afee0b9fc1d |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 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). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_PRIMS_JVMTIIMPL_HPP |
| 26 #define SHARE_VM_PRIMS_JVMTIIMPL_HPP | |
| 27 | |
| 28 #ifndef JVMTI_KERNEL | |
|
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29 |
| 1972 | 30 #include "classfile/systemDictionary.hpp" |
| 31 #include "jvmtifiles/jvmti.h" | |
| 32 #include "oops/objArrayOop.hpp" | |
| 33 #include "prims/jvmtiEnvThreadState.hpp" | |
| 34 #include "prims/jvmtiEventController.hpp" | |
| 35 #include "prims/jvmtiTrace.hpp" | |
| 36 #include "prims/jvmtiUtil.hpp" | |
| 37 #include "runtime/stackValueCollection.hpp" | |
| 38 #include "runtime/vm_operations.hpp" | |
| 39 | |
| 0 | 40 // |
| 41 // Forward Declarations | |
| 42 // | |
| 43 | |
| 44 class JvmtiBreakpoint; | |
| 45 class JvmtiBreakpoints; | |
| 46 | |
| 47 | |
| 48 /////////////////////////////////////////////////////////////// | |
| 49 // | |
| 50 // class GrowableCache, GrowableElement | |
| 51 // Used by : JvmtiBreakpointCache | |
| 52 // Used by JVMTI methods: none directly. | |
| 53 // | |
| 54 // GrowableCache is a permanent CHeap growable array of <GrowableElement *> | |
| 55 // | |
| 56 // In addition, the GrowableCache maintains a NULL terminated cache array of type address | |
| 57 // that's created from the element array using the function: | |
| 58 // address GrowableElement::getCacheValue(). | |
| 59 // | |
| 60 // Whenever the GrowableArray changes size, the cache array gets recomputed into a new C_HEAP allocated | |
| 61 // block of memory. Additionally, every time the cache changes its position in memory, the | |
| 62 // void (*_listener_fun)(void *this_obj, address* cache) | |
| 63 // gets called with the cache's new address. This gives the user of the GrowableCache a callback | |
| 64 // to update its pointer to the address cache. | |
| 65 // | |
| 66 | |
| 67 class GrowableElement : public CHeapObj { | |
| 68 public: | |
| 69 virtual address getCacheValue() =0; | |
| 70 virtual bool equals(GrowableElement* e) =0; | |
| 71 virtual bool lessThan(GrowableElement *e)=0; | |
| 72 virtual GrowableElement *clone() =0; | |
| 73 virtual void oops_do(OopClosure* f) =0; | |
| 74 }; | |
| 75 | |
| 76 class GrowableCache VALUE_OBJ_CLASS_SPEC { | |
| 77 | |
| 78 private: | |
| 79 // Object pointer passed into cache & listener functions. | |
| 80 void *_this_obj; | |
| 81 | |
| 82 // Array of elements in the collection | |
| 83 GrowableArray<GrowableElement *> *_elements; | |
| 84 | |
| 85 // Parallel array of cached values | |
| 86 address *_cache; | |
| 87 | |
| 88 // Listener for changes to the _cache field. | |
| 89 // Called whenever the _cache field has it's value changed | |
| 90 // (but NOT when cached elements are recomputed). | |
| 91 void (*_listener_fun)(void *, address*); | |
| 92 | |
| 93 static bool equals(void *, GrowableElement *); | |
| 94 | |
| 95 // recache all elements after size change, notify listener | |
| 96 void recache(); | |
| 97 | |
| 98 public: | |
| 99 GrowableCache(); | |
| 100 ~GrowableCache(); | |
| 101 | |
| 102 void initialize(void *this_obj, void listener_fun(void *, address*) ); | |
| 103 | |
| 104 // number of elements in the collection | |
| 105 int length(); | |
| 106 // get the value of the index element in the collection | |
| 107 GrowableElement* at(int index); | |
| 108 // find the index of the element, -1 if it doesn't exist | |
| 109 int find(GrowableElement* e); | |
| 110 // append a copy of the element to the end of the collection, notify listener | |
| 111 void append(GrowableElement* e); | |
| 112 // insert a copy of the element using lessthan(), notify listener | |
| 113 void insert(GrowableElement* e); | |
| 114 // remove the element at index, notify listener | |
| 115 void remove (int index); | |
| 116 // clear out all elements and release all heap space, notify listener | |
| 117 void clear(); | |
| 118 // apply f to every element and update the cache | |
| 119 void oops_do(OopClosure* f); | |
| 120 }; | |
| 121 | |
| 122 | |
| 123 /////////////////////////////////////////////////////////////// | |
| 124 // | |
| 125 // class JvmtiBreakpointCache | |
| 126 // Used by : JvmtiBreakpoints | |
| 127 // Used by JVMTI methods: none directly. | |
| 128 // Note : typesafe wrapper for GrowableCache of JvmtiBreakpoint | |
| 129 // | |
| 130 | |
| 131 class JvmtiBreakpointCache : public CHeapObj { | |
| 132 | |
| 133 private: | |
| 134 GrowableCache _cache; | |
| 135 | |
| 136 public: | |
| 137 JvmtiBreakpointCache() {} | |
| 138 ~JvmtiBreakpointCache() {} | |
| 139 | |
| 140 void initialize(void *this_obj, void listener_fun(void *, address*) ) { | |
| 141 _cache.initialize(this_obj,listener_fun); | |
| 142 } | |
| 143 | |
| 144 int length() { return _cache.length(); } | |
| 145 JvmtiBreakpoint& at(int index) { return (JvmtiBreakpoint&) *(_cache.at(index)); } | |
| 146 int find(JvmtiBreakpoint& e) { return _cache.find((GrowableElement *) &e); } | |
| 147 void append(JvmtiBreakpoint& e) { _cache.append((GrowableElement *) &e); } | |
| 148 void remove (int index) { _cache.remove(index); } | |
| 149 void clear() { _cache.clear(); } | |
| 150 void oops_do(OopClosure* f) { _cache.oops_do(f); } | |
| 151 }; | |
| 152 | |
| 153 | |
| 154 /////////////////////////////////////////////////////////////// | |
| 155 // | |
| 156 // class JvmtiBreakpoint | |
| 157 // Used by : JvmtiBreakpoints | |
| 158 // Used by JVMTI methods: SetBreakpoint, ClearBreakpoint, ClearAllBreakpoints | |
| 159 // Note: Extends GrowableElement for use in a GrowableCache | |
| 160 // | |
| 161 // A JvmtiBreakpoint describes a location (class, method, bci) to break at. | |
| 162 // | |
| 163 | |
| 164 typedef void (methodOopDesc::*method_action)(int _bci); | |
| 165 | |
| 166 class JvmtiBreakpoint : public GrowableElement { | |
| 167 private: | |
| 168 methodOop _method; | |
| 169 int _bci; | |
| 170 Bytecodes::Code _orig_bytecode; | |
| 171 | |
| 172 public: | |
| 173 JvmtiBreakpoint(); | |
| 174 JvmtiBreakpoint(methodOop m_method, jlocation location); | |
| 175 bool equals(JvmtiBreakpoint& bp); | |
| 176 bool lessThan(JvmtiBreakpoint &bp); | |
| 177 void copy(JvmtiBreakpoint& bp); | |
| 178 bool is_valid(); | |
| 179 address getBcp(); | |
| 180 void each_method_version_do(method_action meth_act); | |
| 181 void set(); | |
| 182 void clear(); | |
| 183 void print(); | |
| 184 | |
| 185 methodOop method() { return _method; } | |
| 186 | |
| 187 // GrowableElement implementation | |
| 188 address getCacheValue() { return getBcp(); } | |
| 189 bool lessThan(GrowableElement* e) { Unimplemented(); return false; } | |
| 190 bool equals(GrowableElement* e) { return equals((JvmtiBreakpoint&) *e); } | |
| 191 void oops_do(OopClosure* f) { f->do_oop((oop *) &_method); } | |
| 192 GrowableElement *clone() { | |
| 193 JvmtiBreakpoint *bp = new JvmtiBreakpoint(); | |
| 194 bp->copy(*this); | |
| 195 return bp; | |
| 196 } | |
| 197 }; | |
| 198 | |
| 199 | |
| 200 /////////////////////////////////////////////////////////////// | |
| 201 // | |
| 202 // class VM_ChangeBreakpoints | |
| 203 // Used by : JvmtiBreakpoints | |
| 204 // Used by JVMTI methods: none directly. | |
| 205 // Note: A Helper class. | |
| 206 // | |
| 207 // VM_ChangeBreakpoints implements a VM_Operation for ALL modifications to the JvmtiBreakpoints class. | |
| 208 // | |
| 209 | |
| 210 class VM_ChangeBreakpoints : public VM_Operation { | |
| 211 private: | |
| 212 JvmtiBreakpoints* _breakpoints; | |
| 213 int _operation; | |
| 214 JvmtiBreakpoint* _bp; | |
| 215 | |
| 216 public: | |
| 217 enum { SET_BREAKPOINT=0, CLEAR_BREAKPOINT=1, CLEAR_ALL_BREAKPOINT=2 }; | |
| 218 | |
| 219 VM_ChangeBreakpoints(JvmtiBreakpoints* breakpoints, int operation) { | |
| 220 _breakpoints = breakpoints; | |
| 221 _bp = NULL; | |
| 222 _operation = operation; | |
| 223 assert(breakpoints != NULL, "breakpoints != NULL"); | |
| 224 assert(operation == CLEAR_ALL_BREAKPOINT, "unknown breakpoint operation"); | |
| 225 } | |
| 226 VM_ChangeBreakpoints(JvmtiBreakpoints* breakpoints, int operation, JvmtiBreakpoint *bp) { | |
| 227 _breakpoints = breakpoints; | |
| 228 _bp = bp; | |
| 229 _operation = operation; | |
| 230 assert(breakpoints != NULL, "breakpoints != NULL"); | |
| 231 assert(bp != NULL, "bp != NULL"); | |
| 232 assert(operation == SET_BREAKPOINT || operation == CLEAR_BREAKPOINT , "unknown breakpoint operation"); | |
| 233 } | |
| 234 | |
| 235 VMOp_Type type() const { return VMOp_ChangeBreakpoints; } | |
| 236 void doit(); | |
| 237 void oops_do(OopClosure* f); | |
| 238 }; | |
| 239 | |
| 240 | |
| 241 /////////////////////////////////////////////////////////////// | |
| 242 // | |
| 243 // class JvmtiBreakpoints | |
| 244 // Used by : JvmtiCurrentBreakpoints | |
| 245 // Used by JVMTI methods: none directly | |
| 246 // Note: A Helper class | |
| 247 // | |
| 248 // JvmtiBreakpoints is a GrowableCache of JvmtiBreakpoint. | |
| 249 // All changes to the GrowableCache occur at a safepoint using VM_ChangeBreakpoints. | |
| 250 // | |
| 251 // Because _bps is only modified at safepoints, its possible to always use the | |
| 252 // cached byte code pointers from _bps without doing any synchronization (see JvmtiCurrentBreakpoints). | |
| 253 // | |
| 254 // It would be possible to make JvmtiBreakpoints a static class, but I've made it | |
| 255 // CHeap allocated to emphasize its similarity to JvmtiFramePops. | |
| 256 // | |
| 257 | |
| 258 class JvmtiBreakpoints : public CHeapObj { | |
| 259 private: | |
| 260 | |
| 261 JvmtiBreakpointCache _bps; | |
| 262 | |
| 263 // These should only be used by VM_ChangeBreakpoints | |
| 264 // to insure they only occur at safepoints. | |
| 265 // Todo: add checks for safepoint | |
| 266 friend class VM_ChangeBreakpoints; | |
| 267 void set_at_safepoint(JvmtiBreakpoint& bp); | |
| 268 void clear_at_safepoint(JvmtiBreakpoint& bp); | |
| 269 void clearall_at_safepoint(); | |
| 270 | |
| 271 static void do_element(GrowableElement *e); | |
| 272 | |
| 273 public: | |
| 274 JvmtiBreakpoints(void listener_fun(void *, address *)); | |
| 275 ~JvmtiBreakpoints(); | |
| 276 | |
| 277 int length(); | |
| 278 void oops_do(OopClosure* f); | |
| 279 void print(); | |
| 280 | |
| 281 int set(JvmtiBreakpoint& bp); | |
| 282 int clear(JvmtiBreakpoint& bp); | |
| 283 void clearall_in_class_at_safepoint(klassOop klass); | |
| 284 void clearall(); | |
| 285 }; | |
| 286 | |
| 287 | |
| 288 /////////////////////////////////////////////////////////////// | |
| 289 // | |
| 290 // class JvmtiCurrentBreakpoints | |
| 291 // | |
| 292 // A static wrapper class for the JvmtiBreakpoints that provides: | |
| 293 // 1. a fast inlined function to check if a byte code pointer is a breakpoint (is_breakpoint). | |
| 294 // 2. a function for lazily creating the JvmtiBreakpoints class (this is not strictly necessary, | |
| 295 // but I'm copying the code from JvmtiThreadState which needs to lazily initialize | |
| 296 // JvmtiFramePops). | |
| 297 // 3. An oops_do entry point for GC'ing the breakpoint array. | |
| 298 // | |
| 299 | |
| 300 class JvmtiCurrentBreakpoints : public AllStatic { | |
| 301 | |
| 302 private: | |
| 303 | |
| 304 // Current breakpoints, lazily initialized by get_jvmti_breakpoints(); | |
| 305 static JvmtiBreakpoints *_jvmti_breakpoints; | |
| 306 | |
| 307 // NULL terminated cache of byte-code pointers corresponding to current breakpoints. | |
| 308 // Updated only at safepoints (with listener_fun) when the cache is moved. | |
| 309 // It exists only to make is_breakpoint fast. | |
| 310 static address *_breakpoint_list; | |
| 311 static inline void set_breakpoint_list(address *breakpoint_list) { _breakpoint_list = breakpoint_list; } | |
| 312 static inline address *get_breakpoint_list() { return _breakpoint_list; } | |
| 313 | |
| 314 // Listener for the GrowableCache in _jvmti_breakpoints, updates _breakpoint_list. | |
| 315 static void listener_fun(void *this_obj, address *cache); | |
| 316 | |
| 317 public: | |
| 318 static void initialize(); | |
| 319 static void destroy(); | |
| 320 | |
| 321 // lazily create _jvmti_breakpoints and _breakpoint_list | |
| 322 static JvmtiBreakpoints& get_jvmti_breakpoints(); | |
| 323 | |
| 324 // quickly test whether the bcp matches a cached breakpoint in the list | |
| 325 static inline bool is_breakpoint(address bcp); | |
| 326 | |
| 327 static void oops_do(OopClosure* f); | |
| 328 }; | |
| 329 | |
| 330 // quickly test whether the bcp matches a cached breakpoint in the list | |
| 331 bool JvmtiCurrentBreakpoints::is_breakpoint(address bcp) { | |
| 332 address *bps = get_breakpoint_list(); | |
| 333 if (bps == NULL) return false; | |
| 334 for ( ; (*bps) != NULL; bps++) { | |
| 335 if ((*bps) == bcp) return true; | |
| 336 } | |
| 337 return false; | |
| 338 } | |
| 339 | |
| 340 /////////////////////////////////////////////////////////////// | |
| 341 // The get/set local operations must only be done by the VM thread | |
| 342 // because the interpreter version needs to access oop maps, which can | |
| 343 // only safely be done by the VM thread | |
| 344 // | |
| 345 // I'm told that in 1.5 oop maps are now protected by a lock and | |
| 346 // we could get rid of the VM op | |
| 347 // However if the VM op is removed then the target thread must | |
| 348 // be suspended AND a lock will be needed to prevent concurrent | |
| 349 // setting of locals to the same java thread. This lock is needed | |
| 350 // to prevent compiledVFrames from trying to add deferred updates | |
| 351 // to the thread simultaneously. | |
| 352 // | |
| 353 class VM_GetOrSetLocal : public VM_Operation { | |
| 2019 | 354 protected: |
| 0 | 355 JavaThread* _thread; |
| 356 JavaThread* _calling_thread; | |
| 357 jint _depth; | |
| 358 jint _index; | |
| 359 BasicType _type; | |
| 360 jvalue _value; | |
| 361 javaVFrame* _jvf; | |
| 362 bool _set; | |
| 363 | |
| 2019 | 364 // It is possible to get the receiver out of a non-static native wrapper |
| 365 // frame. Use VM_GetReceiver to do this. | |
| 366 virtual bool getting_receiver() const { return false; } | |
| 367 | |
| 0 | 368 jvmtiError _result; |
| 369 | |
| 370 vframe* get_vframe(); | |
| 371 javaVFrame* get_java_vframe(); | |
| 372 bool check_slot_type(javaVFrame* vf); | |
| 373 | |
| 374 public: | |
| 375 // Constructor for non-object getter | |
| 376 VM_GetOrSetLocal(JavaThread* thread, jint depth, jint index, BasicType type); | |
| 377 | |
| 378 // Constructor for object or non-object setter | |
| 379 VM_GetOrSetLocal(JavaThread* thread, jint depth, jint index, BasicType type, jvalue value); | |
| 380 | |
| 381 // Constructor for object getter | |
| 382 VM_GetOrSetLocal(JavaThread* thread, JavaThread* calling_thread, jint depth, | |
| 383 int index); | |
| 384 | |
| 385 VMOp_Type type() const { return VMOp_GetOrSetLocal; } | |
| 386 jvalue value() { return _value; } | |
| 387 jvmtiError result() { return _result; } | |
| 388 | |
| 389 bool doit_prologue(); | |
| 390 void doit(); | |
| 391 bool allow_nested_vm_operations() const; | |
| 392 const char* name() const { return "get/set locals"; } | |
| 393 | |
| 394 // Check that the klass is assignable to a type with the given signature. | |
| 395 static bool is_assignable(const char* ty_sign, Klass* klass, Thread* thread); | |
| 396 }; | |
| 397 | |
| 2019 | 398 class VM_GetReceiver : public VM_GetOrSetLocal { |
| 399 protected: | |
| 400 virtual bool getting_receiver() const { return true; } | |
| 401 | |
| 402 public: | |
| 403 VM_GetReceiver(JavaThread* thread, JavaThread* calling_thread, jint depth); | |
| 404 const char* name() const { return "get receiver"; } | |
| 405 }; | |
| 406 | |
| 0 | 407 |
| 408 /////////////////////////////////////////////////////////////// | |
| 409 // | |
| 410 // class JvmtiSuspendControl | |
| 411 // | |
| 412 // Convenience routines for suspending and resuming threads. | |
| 413 // | |
| 414 // All attempts by JVMTI to suspend and resume threads must go through the | |
| 415 // JvmtiSuspendControl interface. | |
| 416 // | |
| 417 // methods return true if successful | |
| 418 // | |
| 419 class JvmtiSuspendControl : public AllStatic { | |
| 420 public: | |
| 421 // suspend the thread, taking it to a safepoint | |
| 422 static bool suspend(JavaThread *java_thread); | |
| 423 // resume the thread | |
| 424 static bool resume(JavaThread *java_thread); | |
| 425 | |
| 426 static void print(); | |
| 427 }; | |
| 428 | |
|
1983
c760f78e0a53
7003125: precompiled.hpp is included when precompiled headers are not used
stefank
parents:
1972
diff
changeset
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429 #endif // !JVMTI_KERNEL |
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c760f78e0a53
7003125: precompiled.hpp is included when precompiled headers are not used
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430 |
| 0 | 431 // Utility macro that checks for NULL pointers: |
| 432 #define NULL_CHECK(X, Y) if ((X) == NULL) { return (Y); } | |
| 1972 | 433 |
| 434 #endif // SHARE_VM_PRIMS_JVMTIIMPL_HPP |