Fri, 13 Sep 2013 12:48:50 -0700
8024346: ~CautiouslyPreserveExceptionMark - assert(!_thread->has_pending_exception()) failed: unexpected exception generated
Summary: Pending exceptions must be handled properly after a call to the JVMTI merge_cp_and_rewrite
Reviewed-by: coleenp, dholmes
Contributed-by: serguei.spitsyn@oracle.com
duke@435 | 1 | /* |
zgu@4492 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_PRIMS_JVMTIIMPL_HPP |
stefank@2314 | 26 | #define SHARE_VM_PRIMS_JVMTIIMPL_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 29 | #include "jvmtifiles/jvmti.h" |
stefank@2314 | 30 | #include "oops/objArrayOop.hpp" |
stefank@2314 | 31 | #include "prims/jvmtiEnvThreadState.hpp" |
stefank@2314 | 32 | #include "prims/jvmtiEventController.hpp" |
stefank@2314 | 33 | #include "prims/jvmtiTrace.hpp" |
stefank@2314 | 34 | #include "prims/jvmtiUtil.hpp" |
stefank@2314 | 35 | #include "runtime/stackValueCollection.hpp" |
stefank@2314 | 36 | #include "runtime/vm_operations.hpp" |
stefank@2314 | 37 | |
duke@435 | 38 | // |
duke@435 | 39 | // Forward Declarations |
duke@435 | 40 | // |
duke@435 | 41 | |
duke@435 | 42 | class JvmtiBreakpoint; |
duke@435 | 43 | class JvmtiBreakpoints; |
duke@435 | 44 | |
duke@435 | 45 | |
duke@435 | 46 | /////////////////////////////////////////////////////////////// |
duke@435 | 47 | // |
duke@435 | 48 | // class GrowableCache, GrowableElement |
duke@435 | 49 | // Used by : JvmtiBreakpointCache |
duke@435 | 50 | // Used by JVMTI methods: none directly. |
duke@435 | 51 | // |
duke@435 | 52 | // GrowableCache is a permanent CHeap growable array of <GrowableElement *> |
duke@435 | 53 | // |
duke@435 | 54 | // In addition, the GrowableCache maintains a NULL terminated cache array of type address |
duke@435 | 55 | // that's created from the element array using the function: |
duke@435 | 56 | // address GrowableElement::getCacheValue(). |
duke@435 | 57 | // |
duke@435 | 58 | // Whenever the GrowableArray changes size, the cache array gets recomputed into a new C_HEAP allocated |
duke@435 | 59 | // block of memory. Additionally, every time the cache changes its position in memory, the |
duke@435 | 60 | // void (*_listener_fun)(void *this_obj, address* cache) |
duke@435 | 61 | // gets called with the cache's new address. This gives the user of the GrowableCache a callback |
duke@435 | 62 | // to update its pointer to the address cache. |
duke@435 | 63 | // |
duke@435 | 64 | |
zgu@3900 | 65 | class GrowableElement : public CHeapObj<mtInternal> { |
duke@435 | 66 | public: |
duke@435 | 67 | virtual address getCacheValue() =0; |
duke@435 | 68 | virtual bool equals(GrowableElement* e) =0; |
duke@435 | 69 | virtual bool lessThan(GrowableElement *e)=0; |
duke@435 | 70 | virtual GrowableElement *clone() =0; |
duke@435 | 71 | virtual void oops_do(OopClosure* f) =0; |
duke@435 | 72 | }; |
duke@435 | 73 | |
duke@435 | 74 | class GrowableCache VALUE_OBJ_CLASS_SPEC { |
duke@435 | 75 | |
duke@435 | 76 | private: |
duke@435 | 77 | // Object pointer passed into cache & listener functions. |
duke@435 | 78 | void *_this_obj; |
duke@435 | 79 | |
duke@435 | 80 | // Array of elements in the collection |
duke@435 | 81 | GrowableArray<GrowableElement *> *_elements; |
duke@435 | 82 | |
duke@435 | 83 | // Parallel array of cached values |
duke@435 | 84 | address *_cache; |
duke@435 | 85 | |
duke@435 | 86 | // Listener for changes to the _cache field. |
duke@435 | 87 | // Called whenever the _cache field has it's value changed |
duke@435 | 88 | // (but NOT when cached elements are recomputed). |
duke@435 | 89 | void (*_listener_fun)(void *, address*); |
duke@435 | 90 | |
duke@435 | 91 | static bool equals(void *, GrowableElement *); |
duke@435 | 92 | |
duke@435 | 93 | // recache all elements after size change, notify listener |
duke@435 | 94 | void recache(); |
duke@435 | 95 | |
duke@435 | 96 | public: |
duke@435 | 97 | GrowableCache(); |
duke@435 | 98 | ~GrowableCache(); |
duke@435 | 99 | |
duke@435 | 100 | void initialize(void *this_obj, void listener_fun(void *, address*) ); |
duke@435 | 101 | |
duke@435 | 102 | // number of elements in the collection |
duke@435 | 103 | int length(); |
duke@435 | 104 | // get the value of the index element in the collection |
duke@435 | 105 | GrowableElement* at(int index); |
duke@435 | 106 | // find the index of the element, -1 if it doesn't exist |
duke@435 | 107 | int find(GrowableElement* e); |
duke@435 | 108 | // append a copy of the element to the end of the collection, notify listener |
duke@435 | 109 | void append(GrowableElement* e); |
duke@435 | 110 | // insert a copy of the element using lessthan(), notify listener |
duke@435 | 111 | void insert(GrowableElement* e); |
duke@435 | 112 | // remove the element at index, notify listener |
duke@435 | 113 | void remove (int index); |
duke@435 | 114 | // clear out all elements and release all heap space, notify listener |
duke@435 | 115 | void clear(); |
duke@435 | 116 | // apply f to every element and update the cache |
duke@435 | 117 | void oops_do(OopClosure* f); |
kamg@2467 | 118 | // update the cache after a full gc |
kamg@2467 | 119 | void gc_epilogue(); |
duke@435 | 120 | }; |
duke@435 | 121 | |
duke@435 | 122 | |
duke@435 | 123 | /////////////////////////////////////////////////////////////// |
duke@435 | 124 | // |
duke@435 | 125 | // class JvmtiBreakpointCache |
duke@435 | 126 | // Used by : JvmtiBreakpoints |
duke@435 | 127 | // Used by JVMTI methods: none directly. |
duke@435 | 128 | // Note : typesafe wrapper for GrowableCache of JvmtiBreakpoint |
duke@435 | 129 | // |
duke@435 | 130 | |
zgu@3900 | 131 | class JvmtiBreakpointCache : public CHeapObj<mtInternal> { |
duke@435 | 132 | |
duke@435 | 133 | private: |
duke@435 | 134 | GrowableCache _cache; |
duke@435 | 135 | |
duke@435 | 136 | public: |
duke@435 | 137 | JvmtiBreakpointCache() {} |
duke@435 | 138 | ~JvmtiBreakpointCache() {} |
duke@435 | 139 | |
duke@435 | 140 | void initialize(void *this_obj, void listener_fun(void *, address*) ) { |
duke@435 | 141 | _cache.initialize(this_obj,listener_fun); |
duke@435 | 142 | } |
duke@435 | 143 | |
duke@435 | 144 | int length() { return _cache.length(); } |
duke@435 | 145 | JvmtiBreakpoint& at(int index) { return (JvmtiBreakpoint&) *(_cache.at(index)); } |
duke@435 | 146 | int find(JvmtiBreakpoint& e) { return _cache.find((GrowableElement *) &e); } |
duke@435 | 147 | void append(JvmtiBreakpoint& e) { _cache.append((GrowableElement *) &e); } |
duke@435 | 148 | void remove (int index) { _cache.remove(index); } |
duke@435 | 149 | void clear() { _cache.clear(); } |
duke@435 | 150 | void oops_do(OopClosure* f) { _cache.oops_do(f); } |
kamg@2467 | 151 | void gc_epilogue() { _cache.gc_epilogue(); } |
duke@435 | 152 | }; |
duke@435 | 153 | |
duke@435 | 154 | |
duke@435 | 155 | /////////////////////////////////////////////////////////////// |
duke@435 | 156 | // |
duke@435 | 157 | // class JvmtiBreakpoint |
duke@435 | 158 | // Used by : JvmtiBreakpoints |
duke@435 | 159 | // Used by JVMTI methods: SetBreakpoint, ClearBreakpoint, ClearAllBreakpoints |
duke@435 | 160 | // Note: Extends GrowableElement for use in a GrowableCache |
duke@435 | 161 | // |
duke@435 | 162 | // A JvmtiBreakpoint describes a location (class, method, bci) to break at. |
duke@435 | 163 | // |
duke@435 | 164 | |
coleenp@4037 | 165 | typedef void (Method::*method_action)(int _bci); |
duke@435 | 166 | |
duke@435 | 167 | class JvmtiBreakpoint : public GrowableElement { |
duke@435 | 168 | private: |
coleenp@4037 | 169 | Method* _method; |
duke@435 | 170 | int _bci; |
duke@435 | 171 | Bytecodes::Code _orig_bytecode; |
coleenp@4037 | 172 | oop _class_loader; |
duke@435 | 173 | |
duke@435 | 174 | public: |
duke@435 | 175 | JvmtiBreakpoint(); |
coleenp@4037 | 176 | JvmtiBreakpoint(Method* m_method, jlocation location); |
duke@435 | 177 | bool equals(JvmtiBreakpoint& bp); |
duke@435 | 178 | bool lessThan(JvmtiBreakpoint &bp); |
duke@435 | 179 | void copy(JvmtiBreakpoint& bp); |
duke@435 | 180 | bool is_valid(); |
duke@435 | 181 | address getBcp(); |
duke@435 | 182 | void each_method_version_do(method_action meth_act); |
duke@435 | 183 | void set(); |
duke@435 | 184 | void clear(); |
duke@435 | 185 | void print(); |
duke@435 | 186 | |
coleenp@4037 | 187 | Method* method() { return _method; } |
duke@435 | 188 | |
duke@435 | 189 | // GrowableElement implementation |
duke@435 | 190 | address getCacheValue() { return getBcp(); } |
duke@435 | 191 | bool lessThan(GrowableElement* e) { Unimplemented(); return false; } |
duke@435 | 192 | bool equals(GrowableElement* e) { return equals((JvmtiBreakpoint&) *e); } |
coleenp@4037 | 193 | void oops_do(OopClosure* f) { |
coleenp@4037 | 194 | // Mark the method loader as live |
coleenp@4037 | 195 | f->do_oop(&_class_loader); |
coleenp@4037 | 196 | } |
duke@435 | 197 | GrowableElement *clone() { |
duke@435 | 198 | JvmtiBreakpoint *bp = new JvmtiBreakpoint(); |
duke@435 | 199 | bp->copy(*this); |
duke@435 | 200 | return bp; |
duke@435 | 201 | } |
duke@435 | 202 | }; |
duke@435 | 203 | |
duke@435 | 204 | |
duke@435 | 205 | /////////////////////////////////////////////////////////////// |
duke@435 | 206 | // |
duke@435 | 207 | // class JvmtiBreakpoints |
duke@435 | 208 | // Used by : JvmtiCurrentBreakpoints |
duke@435 | 209 | // Used by JVMTI methods: none directly |
duke@435 | 210 | // Note: A Helper class |
duke@435 | 211 | // |
duke@435 | 212 | // JvmtiBreakpoints is a GrowableCache of JvmtiBreakpoint. |
duke@435 | 213 | // All changes to the GrowableCache occur at a safepoint using VM_ChangeBreakpoints. |
duke@435 | 214 | // |
duke@435 | 215 | // Because _bps is only modified at safepoints, its possible to always use the |
duke@435 | 216 | // cached byte code pointers from _bps without doing any synchronization (see JvmtiCurrentBreakpoints). |
duke@435 | 217 | // |
duke@435 | 218 | // It would be possible to make JvmtiBreakpoints a static class, but I've made it |
duke@435 | 219 | // CHeap allocated to emphasize its similarity to JvmtiFramePops. |
duke@435 | 220 | // |
duke@435 | 221 | |
zgu@3900 | 222 | class JvmtiBreakpoints : public CHeapObj<mtInternal> { |
duke@435 | 223 | private: |
duke@435 | 224 | |
duke@435 | 225 | JvmtiBreakpointCache _bps; |
duke@435 | 226 | |
duke@435 | 227 | // These should only be used by VM_ChangeBreakpoints |
duke@435 | 228 | // to insure they only occur at safepoints. |
duke@435 | 229 | // Todo: add checks for safepoint |
duke@435 | 230 | friend class VM_ChangeBreakpoints; |
duke@435 | 231 | void set_at_safepoint(JvmtiBreakpoint& bp); |
duke@435 | 232 | void clear_at_safepoint(JvmtiBreakpoint& bp); |
duke@435 | 233 | |
duke@435 | 234 | static void do_element(GrowableElement *e); |
duke@435 | 235 | |
duke@435 | 236 | public: |
duke@435 | 237 | JvmtiBreakpoints(void listener_fun(void *, address *)); |
duke@435 | 238 | ~JvmtiBreakpoints(); |
duke@435 | 239 | |
duke@435 | 240 | int length(); |
duke@435 | 241 | void oops_do(OopClosure* f); |
duke@435 | 242 | void print(); |
duke@435 | 243 | |
duke@435 | 244 | int set(JvmtiBreakpoint& bp); |
duke@435 | 245 | int clear(JvmtiBreakpoint& bp); |
coleenp@4037 | 246 | void clearall_in_class_at_safepoint(Klass* klass); |
kamg@2467 | 247 | void gc_epilogue(); |
duke@435 | 248 | }; |
duke@435 | 249 | |
duke@435 | 250 | |
duke@435 | 251 | /////////////////////////////////////////////////////////////// |
duke@435 | 252 | // |
duke@435 | 253 | // class JvmtiCurrentBreakpoints |
duke@435 | 254 | // |
duke@435 | 255 | // A static wrapper class for the JvmtiBreakpoints that provides: |
duke@435 | 256 | // 1. a fast inlined function to check if a byte code pointer is a breakpoint (is_breakpoint). |
duke@435 | 257 | // 2. a function for lazily creating the JvmtiBreakpoints class (this is not strictly necessary, |
duke@435 | 258 | // but I'm copying the code from JvmtiThreadState which needs to lazily initialize |
duke@435 | 259 | // JvmtiFramePops). |
duke@435 | 260 | // 3. An oops_do entry point for GC'ing the breakpoint array. |
duke@435 | 261 | // |
duke@435 | 262 | |
duke@435 | 263 | class JvmtiCurrentBreakpoints : public AllStatic { |
duke@435 | 264 | |
duke@435 | 265 | private: |
duke@435 | 266 | |
duke@435 | 267 | // Current breakpoints, lazily initialized by get_jvmti_breakpoints(); |
duke@435 | 268 | static JvmtiBreakpoints *_jvmti_breakpoints; |
duke@435 | 269 | |
duke@435 | 270 | // NULL terminated cache of byte-code pointers corresponding to current breakpoints. |
duke@435 | 271 | // Updated only at safepoints (with listener_fun) when the cache is moved. |
duke@435 | 272 | // It exists only to make is_breakpoint fast. |
duke@435 | 273 | static address *_breakpoint_list; |
duke@435 | 274 | static inline void set_breakpoint_list(address *breakpoint_list) { _breakpoint_list = breakpoint_list; } |
duke@435 | 275 | static inline address *get_breakpoint_list() { return _breakpoint_list; } |
duke@435 | 276 | |
duke@435 | 277 | // Listener for the GrowableCache in _jvmti_breakpoints, updates _breakpoint_list. |
duke@435 | 278 | static void listener_fun(void *this_obj, address *cache); |
duke@435 | 279 | |
duke@435 | 280 | public: |
duke@435 | 281 | static void initialize(); |
duke@435 | 282 | static void destroy(); |
duke@435 | 283 | |
duke@435 | 284 | // lazily create _jvmti_breakpoints and _breakpoint_list |
duke@435 | 285 | static JvmtiBreakpoints& get_jvmti_breakpoints(); |
duke@435 | 286 | |
duke@435 | 287 | // quickly test whether the bcp matches a cached breakpoint in the list |
duke@435 | 288 | static inline bool is_breakpoint(address bcp); |
duke@435 | 289 | |
duke@435 | 290 | static void oops_do(OopClosure* f); |
kamg@2467 | 291 | static void gc_epilogue(); |
duke@435 | 292 | }; |
duke@435 | 293 | |
duke@435 | 294 | // quickly test whether the bcp matches a cached breakpoint in the list |
duke@435 | 295 | bool JvmtiCurrentBreakpoints::is_breakpoint(address bcp) { |
duke@435 | 296 | address *bps = get_breakpoint_list(); |
duke@435 | 297 | if (bps == NULL) return false; |
duke@435 | 298 | for ( ; (*bps) != NULL; bps++) { |
duke@435 | 299 | if ((*bps) == bcp) return true; |
duke@435 | 300 | } |
duke@435 | 301 | return false; |
duke@435 | 302 | } |
duke@435 | 303 | |
sla@5237 | 304 | |
sla@5237 | 305 | /////////////////////////////////////////////////////////////// |
sla@5237 | 306 | // |
sla@5237 | 307 | // class VM_ChangeBreakpoints |
sla@5237 | 308 | // Used by : JvmtiBreakpoints |
sla@5237 | 309 | // Used by JVMTI methods: none directly. |
sla@5237 | 310 | // Note: A Helper class. |
sla@5237 | 311 | // |
sla@5237 | 312 | // VM_ChangeBreakpoints implements a VM_Operation for ALL modifications to the JvmtiBreakpoints class. |
sla@5237 | 313 | // |
sla@5237 | 314 | |
sla@5237 | 315 | class VM_ChangeBreakpoints : public VM_Operation { |
sla@5237 | 316 | private: |
sla@5237 | 317 | JvmtiBreakpoints* _breakpoints; |
sla@5237 | 318 | int _operation; |
sla@5237 | 319 | JvmtiBreakpoint* _bp; |
sla@5237 | 320 | |
sla@5237 | 321 | public: |
sla@5237 | 322 | enum { SET_BREAKPOINT=0, CLEAR_BREAKPOINT=1 }; |
sla@5237 | 323 | |
sla@5237 | 324 | VM_ChangeBreakpoints(int operation, JvmtiBreakpoint *bp) { |
sla@5237 | 325 | JvmtiBreakpoints& current_bps = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); |
sla@5237 | 326 | _breakpoints = ¤t_bps; |
sla@5237 | 327 | _bp = bp; |
sla@5237 | 328 | _operation = operation; |
sla@5237 | 329 | assert(bp != NULL, "bp != NULL"); |
sla@5237 | 330 | } |
sla@5237 | 331 | |
sla@5237 | 332 | VMOp_Type type() const { return VMOp_ChangeBreakpoints; } |
sla@5237 | 333 | void doit(); |
sla@5237 | 334 | void oops_do(OopClosure* f); |
sla@5237 | 335 | }; |
sla@5237 | 336 | |
sla@5237 | 337 | |
duke@435 | 338 | /////////////////////////////////////////////////////////////// |
duke@435 | 339 | // The get/set local operations must only be done by the VM thread |
duke@435 | 340 | // because the interpreter version needs to access oop maps, which can |
duke@435 | 341 | // only safely be done by the VM thread |
duke@435 | 342 | // |
duke@435 | 343 | // I'm told that in 1.5 oop maps are now protected by a lock and |
duke@435 | 344 | // we could get rid of the VM op |
duke@435 | 345 | // However if the VM op is removed then the target thread must |
duke@435 | 346 | // be suspended AND a lock will be needed to prevent concurrent |
duke@435 | 347 | // setting of locals to the same java thread. This lock is needed |
duke@435 | 348 | // to prevent compiledVFrames from trying to add deferred updates |
duke@435 | 349 | // to the thread simultaneously. |
duke@435 | 350 | // |
duke@435 | 351 | class VM_GetOrSetLocal : public VM_Operation { |
kamg@2361 | 352 | protected: |
duke@435 | 353 | JavaThread* _thread; |
duke@435 | 354 | JavaThread* _calling_thread; |
duke@435 | 355 | jint _depth; |
duke@435 | 356 | jint _index; |
duke@435 | 357 | BasicType _type; |
duke@435 | 358 | jvalue _value; |
duke@435 | 359 | javaVFrame* _jvf; |
duke@435 | 360 | bool _set; |
duke@435 | 361 | |
kamg@2361 | 362 | // It is possible to get the receiver out of a non-static native wrapper |
kamg@2361 | 363 | // frame. Use VM_GetReceiver to do this. |
kamg@2361 | 364 | virtual bool getting_receiver() const { return false; } |
kamg@2361 | 365 | |
duke@435 | 366 | jvmtiError _result; |
duke@435 | 367 | |
duke@435 | 368 | vframe* get_vframe(); |
duke@435 | 369 | javaVFrame* get_java_vframe(); |
duke@435 | 370 | bool check_slot_type(javaVFrame* vf); |
duke@435 | 371 | |
duke@435 | 372 | public: |
duke@435 | 373 | // Constructor for non-object getter |
duke@435 | 374 | VM_GetOrSetLocal(JavaThread* thread, jint depth, jint index, BasicType type); |
duke@435 | 375 | |
duke@435 | 376 | // Constructor for object or non-object setter |
duke@435 | 377 | VM_GetOrSetLocal(JavaThread* thread, jint depth, jint index, BasicType type, jvalue value); |
duke@435 | 378 | |
duke@435 | 379 | // Constructor for object getter |
duke@435 | 380 | VM_GetOrSetLocal(JavaThread* thread, JavaThread* calling_thread, jint depth, |
duke@435 | 381 | int index); |
duke@435 | 382 | |
duke@435 | 383 | VMOp_Type type() const { return VMOp_GetOrSetLocal; } |
duke@435 | 384 | jvalue value() { return _value; } |
duke@435 | 385 | jvmtiError result() { return _result; } |
duke@435 | 386 | |
duke@435 | 387 | bool doit_prologue(); |
duke@435 | 388 | void doit(); |
duke@435 | 389 | bool allow_nested_vm_operations() const; |
duke@435 | 390 | const char* name() const { return "get/set locals"; } |
duke@435 | 391 | |
duke@435 | 392 | // Check that the klass is assignable to a type with the given signature. |
duke@435 | 393 | static bool is_assignable(const char* ty_sign, Klass* klass, Thread* thread); |
duke@435 | 394 | }; |
duke@435 | 395 | |
kamg@2361 | 396 | class VM_GetReceiver : public VM_GetOrSetLocal { |
kamg@2361 | 397 | protected: |
kamg@2361 | 398 | virtual bool getting_receiver() const { return true; } |
kamg@2361 | 399 | |
kamg@2361 | 400 | public: |
kamg@2361 | 401 | VM_GetReceiver(JavaThread* thread, JavaThread* calling_thread, jint depth); |
kamg@2361 | 402 | const char* name() const { return "get receiver"; } |
kamg@2361 | 403 | }; |
kamg@2361 | 404 | |
duke@435 | 405 | |
duke@435 | 406 | /////////////////////////////////////////////////////////////// |
duke@435 | 407 | // |
duke@435 | 408 | // class JvmtiSuspendControl |
duke@435 | 409 | // |
duke@435 | 410 | // Convenience routines for suspending and resuming threads. |
duke@435 | 411 | // |
duke@435 | 412 | // All attempts by JVMTI to suspend and resume threads must go through the |
duke@435 | 413 | // JvmtiSuspendControl interface. |
duke@435 | 414 | // |
duke@435 | 415 | // methods return true if successful |
duke@435 | 416 | // |
duke@435 | 417 | class JvmtiSuspendControl : public AllStatic { |
duke@435 | 418 | public: |
duke@435 | 419 | // suspend the thread, taking it to a safepoint |
duke@435 | 420 | static bool suspend(JavaThread *java_thread); |
duke@435 | 421 | // resume the thread |
duke@435 | 422 | static bool resume(JavaThread *java_thread); |
duke@435 | 423 | |
duke@435 | 424 | static void print(); |
duke@435 | 425 | }; |
duke@435 | 426 | |
stefank@2325 | 427 | |
kamg@2511 | 428 | /** |
kamg@2511 | 429 | * When a thread (such as the compiler thread or VM thread) cannot post a |
kamg@2511 | 430 | * JVMTI event itself because the event needs to be posted from a Java |
kamg@2511 | 431 | * thread, then it can defer the event to the Service thread for posting. |
kamg@2511 | 432 | * The information needed to post the event is encapsulated into this class |
kamg@2511 | 433 | * and then enqueued onto the JvmtiDeferredEventQueue, where the Service |
kamg@2511 | 434 | * thread will pick it up and post it. |
kamg@2511 | 435 | * |
kamg@2511 | 436 | * This is currently only used for posting compiled-method-load and unload |
kamg@2511 | 437 | * events, which we don't want posted from the compiler thread. |
kamg@2511 | 438 | */ |
kamg@2511 | 439 | class JvmtiDeferredEvent VALUE_OBJ_CLASS_SPEC { |
kamg@2511 | 440 | friend class JvmtiDeferredEventQueue; |
kamg@2511 | 441 | private: |
kamg@2511 | 442 | typedef enum { |
kamg@2511 | 443 | TYPE_NONE, |
kamg@2511 | 444 | TYPE_COMPILED_METHOD_LOAD, |
kamg@2511 | 445 | TYPE_COMPILED_METHOD_UNLOAD, |
kamg@2583 | 446 | TYPE_DYNAMIC_CODE_GENERATED |
kamg@2511 | 447 | } Type; |
kamg@2511 | 448 | |
kamg@2511 | 449 | Type _type; |
kamg@2511 | 450 | union { |
kamg@2511 | 451 | nmethod* compiled_method_load; |
kamg@2511 | 452 | struct { |
dcubed@2624 | 453 | nmethod* nm; |
kamg@2511 | 454 | jmethodID method_id; |
kamg@2511 | 455 | const void* code_begin; |
kamg@2511 | 456 | } compiled_method_unload; |
kamg@2583 | 457 | struct { |
kamg@2583 | 458 | const char* name; |
kamg@2583 | 459 | const void* code_begin; |
kamg@2583 | 460 | const void* code_end; |
kamg@2583 | 461 | } dynamic_code_generated; |
kamg@2511 | 462 | } _event_data; |
kamg@2511 | 463 | |
kamg@2511 | 464 | JvmtiDeferredEvent(Type t) : _type(t) {} |
kamg@2511 | 465 | |
kamg@2511 | 466 | public: |
kamg@2511 | 467 | |
kamg@2511 | 468 | JvmtiDeferredEvent() : _type(TYPE_NONE) {} |
kamg@2511 | 469 | |
kamg@2511 | 470 | // Factory methods |
kamg@2511 | 471 | static JvmtiDeferredEvent compiled_method_load_event(nmethod* nm) |
jprovino@4165 | 472 | NOT_JVMTI_RETURN_(JvmtiDeferredEvent()); |
dcubed@2624 | 473 | static JvmtiDeferredEvent compiled_method_unload_event(nmethod* nm, |
jprovino@4165 | 474 | jmethodID id, const void* code) NOT_JVMTI_RETURN_(JvmtiDeferredEvent()); |
kamg@2583 | 475 | static JvmtiDeferredEvent dynamic_code_generated_event( |
kamg@2583 | 476 | const char* name, const void* begin, const void* end) |
jprovino@4165 | 477 | NOT_JVMTI_RETURN_(JvmtiDeferredEvent()); |
kamg@2511 | 478 | |
kamg@2511 | 479 | // Actually posts the event. |
jprovino@4165 | 480 | void post() NOT_JVMTI_RETURN; |
kamg@2511 | 481 | }; |
kamg@2511 | 482 | |
kamg@2511 | 483 | /** |
kamg@2511 | 484 | * Events enqueued on this queue wake up the Service thread which dequeues |
kamg@2511 | 485 | * and posts the events. The Service_lock is required to be held |
kamg@2511 | 486 | * when operating on the queue (except for the "pending" events). |
kamg@2511 | 487 | */ |
kamg@2511 | 488 | class JvmtiDeferredEventQueue : AllStatic { |
kamg@2511 | 489 | friend class JvmtiDeferredEvent; |
kamg@2511 | 490 | private: |
zgu@3900 | 491 | class QueueNode : public CHeapObj<mtInternal> { |
kamg@2511 | 492 | private: |
kamg@2511 | 493 | JvmtiDeferredEvent _event; |
kamg@2511 | 494 | QueueNode* _next; |
kamg@2511 | 495 | |
kamg@2511 | 496 | public: |
kamg@2511 | 497 | QueueNode(const JvmtiDeferredEvent& event) |
kamg@2511 | 498 | : _event(event), _next(NULL) {} |
kamg@2511 | 499 | |
kamg@2511 | 500 | const JvmtiDeferredEvent& event() const { return _event; } |
kamg@2511 | 501 | QueueNode* next() const { return _next; } |
kamg@2511 | 502 | |
kamg@2511 | 503 | void set_next(QueueNode* next) { _next = next; } |
kamg@2511 | 504 | }; |
kamg@2511 | 505 | |
kamg@2511 | 506 | static QueueNode* _queue_head; // Hold Service_lock to access |
kamg@2511 | 507 | static QueueNode* _queue_tail; // Hold Service_lock to access |
kamg@2511 | 508 | static volatile QueueNode* _pending_list; // Uses CAS for read/update |
kamg@2511 | 509 | |
kamg@2511 | 510 | // Transfers events from the _pending_list to the _queue. |
jprovino@4165 | 511 | static void process_pending_events() NOT_JVMTI_RETURN; |
kamg@2511 | 512 | |
kamg@2511 | 513 | public: |
kamg@2511 | 514 | // Must be holding Service_lock when calling these |
jprovino@4165 | 515 | static bool has_events() NOT_JVMTI_RETURN_(false); |
jprovino@4165 | 516 | static void enqueue(const JvmtiDeferredEvent& event) NOT_JVMTI_RETURN; |
jprovino@4165 | 517 | static JvmtiDeferredEvent dequeue() NOT_JVMTI_RETURN_(JvmtiDeferredEvent()); |
kamg@2511 | 518 | |
kamg@2511 | 519 | // Used to enqueue events without using a lock, for times (such as during |
kamg@2511 | 520 | // safepoint) when we can't or don't want to lock the Service_lock. |
kamg@2511 | 521 | // |
kamg@2511 | 522 | // Events will be held off to the side until there's a call to |
kamg@2511 | 523 | // dequeue(), enqueue(), or process_pending_events() (all of which require |
kamg@2511 | 524 | // the holding of the Service_lock), and will be enqueued at that time. |
jprovino@4165 | 525 | static void add_pending_event(const JvmtiDeferredEvent&) NOT_JVMTI_RETURN; |
kamg@2511 | 526 | }; |
kamg@2511 | 527 | |
duke@435 | 528 | // Utility macro that checks for NULL pointers: |
duke@435 | 529 | #define NULL_CHECK(X, Y) if ((X) == NULL) { return (Y); } |
stefank@2314 | 530 | |
stefank@2314 | 531 | #endif // SHARE_VM_PRIMS_JVMTIIMPL_HPP |