Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiCodeBlobEvents.cpp @ 973:ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
Reviewed-by: kamg, phh
| author | acorn |
|---|---|
| date | Fri, 04 Sep 2009 12:53:02 -0400 |
| parents | 72088be4b386 |
| children | f70b0d9ab095 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
931
72088be4b386
6873116: Modify reexecute implementation to use pcDesc to record the reexecute bit
cfang
parents:
0
diff
changeset
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2 * Copyright 2003-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_jvmtiCodeBlobEvents.cpp.incl" | |
| 27 | |
| 28 // Support class to collect a list of the non-nmethod CodeBlobs in | |
| 29 // the CodeCache. | |
| 30 // | |
| 31 // This class actually creates a list of JvmtiCodeBlobDesc - each JvmtiCodeBlobDesc | |
| 32 // describes a single CodeBlob in the CodeCache. Note that collection is | |
| 33 // done to a static list - this is because CodeCache::blobs_do is defined | |
| 34 // as void CodeCache::blobs_do(void f(CodeBlob* nm)) and hence requires | |
| 35 // a C or static method. | |
| 36 // | |
| 37 // Usage :- | |
| 38 // | |
| 39 // CodeBlobCollector collector; | |
| 40 // | |
| 41 // collector.collect(); | |
| 42 // JvmtiCodeBlobDesc* blob = collector.first(); | |
| 43 // while (blob != NULL) { | |
| 44 // : | |
| 45 // blob = collector.next(); | |
| 46 // } | |
| 47 // | |
| 48 | |
| 49 class CodeBlobCollector : StackObj { | |
| 50 private: | |
| 51 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected blobs | |
| 52 int _pos; // iterator position | |
| 53 | |
| 54 // used during a collection | |
| 55 static GrowableArray<JvmtiCodeBlobDesc*>* _global_code_blobs; | |
| 56 static void do_blob(CodeBlob* cb); | |
| 57 public: | |
| 58 CodeBlobCollector() { | |
| 59 _code_blobs = NULL; | |
| 60 _pos = -1; | |
| 61 } | |
| 62 ~CodeBlobCollector() { | |
| 63 if (_code_blobs != NULL) { | |
| 64 for (int i=0; i<_code_blobs->length(); i++) { | |
| 65 FreeHeap(_code_blobs->at(i)); | |
| 66 } | |
| 67 delete _code_blobs; | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 // collect list of code blobs in the cache | |
| 72 void collect(); | |
| 73 | |
| 74 // iteration support - return first code blob | |
| 75 JvmtiCodeBlobDesc* first() { | |
| 76 assert(_code_blobs != NULL, "not collected"); | |
| 77 if (_code_blobs->length() == 0) { | |
| 78 return NULL; | |
| 79 } | |
| 80 _pos = 0; | |
| 81 return _code_blobs->at(0); | |
| 82 } | |
| 83 | |
| 84 // iteration support - return next code blob | |
| 85 JvmtiCodeBlobDesc* next() { | |
| 86 assert(_pos >= 0, "iteration not started"); | |
| 87 if (_pos+1 >= _code_blobs->length()) { | |
| 88 return NULL; | |
| 89 } | |
| 90 return _code_blobs->at(++_pos); | |
| 91 } | |
| 92 | |
| 93 }; | |
| 94 | |
| 95 // used during collection | |
| 96 GrowableArray<JvmtiCodeBlobDesc*>* CodeBlobCollector::_global_code_blobs; | |
| 97 | |
| 98 | |
| 99 // called for each CodeBlob in the CodeCache | |
| 100 // | |
| 101 // This function filters out nmethods as it is only interested in | |
| 102 // other CodeBlobs. This function also filters out CodeBlobs that have | |
| 103 // a duplicate starting address as previous blobs. This is needed to | |
| 104 // handle the case where multiple stubs are generated into a single | |
| 105 // BufferBlob. | |
| 106 | |
| 107 void CodeBlobCollector::do_blob(CodeBlob* cb) { | |
| 108 | |
| 109 // ignore nmethods | |
| 110 if (cb->is_nmethod()) { | |
| 111 return; | |
| 112 } | |
| 113 | |
| 114 // check if this starting address has been seen already - the | |
| 115 // assumption is that stubs are inserted into the list before the | |
| 116 // enclosing BufferBlobs. | |
| 117 address addr = cb->instructions_begin(); | |
| 118 for (int i=0; i<_global_code_blobs->length(); i++) { | |
| 119 JvmtiCodeBlobDesc* scb = _global_code_blobs->at(i); | |
| 120 if (addr == scb->code_begin()) { | |
| 121 return; | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 // we must name the CodeBlob - some CodeBlobs already have names :- | |
| 126 // - stubs used by compiled code to call a (static) C++ runtime routine | |
| 127 // - non-relocatable machine code such as the interpreter, stubroutines, etc. | |
| 128 // - various singleton blobs | |
| 129 // | |
| 130 // others are unnamed so we create a name :- | |
| 131 // - OSR adapter (interpreter frame that has been on-stack replaced) | |
| 132 // - I2C and C2I adapters | |
| 133 const char* name = NULL; | |
| 134 if (cb->is_runtime_stub()) { | |
| 135 name = ((RuntimeStub*)cb)->name(); | |
| 136 } | |
| 137 if (cb->is_buffer_blob()) { | |
| 138 name = ((BufferBlob*)cb)->name(); | |
| 139 } | |
| 140 if (cb->is_deoptimization_stub() || cb->is_safepoint_stub()) { | |
| 141 name = ((SingletonBlob*)cb)->name(); | |
| 142 } | |
| 143 if (cb->is_uncommon_trap_stub() || cb->is_exception_stub()) { | |
| 144 name = ((SingletonBlob*)cb)->name(); | |
| 145 } | |
| 146 | |
| 147 // record the CodeBlob details as a JvmtiCodeBlobDesc | |
| 148 JvmtiCodeBlobDesc* scb = new JvmtiCodeBlobDesc(name, cb->instructions_begin(), | |
| 149 cb->instructions_end()); | |
| 150 _global_code_blobs->append(scb); | |
| 151 } | |
| 152 | |
| 153 | |
| 154 // collects a list of CodeBlobs in the CodeCache. | |
| 155 // | |
| 156 // The created list is growable array of JvmtiCodeBlobDesc - each one describes | |
| 157 // a CodeBlob. Note that the list is static - this is because CodeBlob::blobs_do | |
| 158 // requires a a C or static function so we can't use an instance function. This | |
| 159 // isn't a problem as the iteration is serial anyway as we need the CodeCache_lock | |
| 160 // to iterate over the code cache. | |
| 161 // | |
| 162 // Note that the CodeBlobs in the CodeCache will include BufferBlobs that may | |
| 163 // contain multiple stubs. As a profiler is interested in the stubs rather than | |
| 164 // the enclosing container we first iterate over the stub code descriptors so | |
| 165 // that the stubs go into the list first. do_blob will then filter out the | |
| 166 // enclosing blobs if the starting address of the enclosing blobs matches the | |
| 167 // starting address of first stub generated in the enclosing blob. | |
| 168 | |
| 169 void CodeBlobCollector::collect() { | |
| 170 assert_locked_or_safepoint(CodeCache_lock); | |
| 171 assert(_global_code_blobs == NULL, "checking"); | |
| 172 | |
| 173 // create the global list | |
| 174 _global_code_blobs = new (ResourceObj::C_HEAP) GrowableArray<JvmtiCodeBlobDesc*>(50,true); | |
| 175 | |
| 176 // iterate over the stub code descriptors and put them in the list first. | |
| 177 int index = 0; | |
| 178 StubCodeDesc* desc; | |
| 179 while ((desc = StubCodeDesc::desc_for_index(++index)) != NULL) { | |
| 180 _global_code_blobs->append(new JvmtiCodeBlobDesc(desc->name(), desc->begin(), desc->end())); | |
| 181 } | |
| 182 | |
| 183 // next iterate over all the non-nmethod code blobs and add them to | |
| 184 // the list - as noted above this will filter out duplicates and | |
| 185 // enclosing blobs. | |
| 186 CodeCache::blobs_do(do_blob); | |
| 187 | |
| 188 // make the global list the instance list so that it can be used | |
| 189 // for other iterations. | |
| 190 _code_blobs = _global_code_blobs; | |
| 191 _global_code_blobs = NULL; | |
| 192 } | |
| 193 | |
| 194 | |
| 195 // Generate a DYNAMIC_CODE_GENERATED event for each non-nmethod code blob. | |
| 196 | |
| 197 jvmtiError JvmtiCodeBlobEvents::generate_dynamic_code_events(JvmtiEnv* env) { | |
| 198 CodeBlobCollector collector; | |
| 199 | |
| 200 // first collect all the code blobs | |
| 201 { | |
| 202 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 203 collector.collect(); | |
| 204 } | |
| 205 | |
| 206 // iterate over the collected list and post an event for each blob | |
| 207 JvmtiCodeBlobDesc* blob = collector.first(); | |
| 208 while (blob != NULL) { | |
| 209 JvmtiExport::post_dynamic_code_generated(env, blob->name(), blob->code_begin(), blob->code_end()); | |
| 210 blob = collector.next(); | |
| 211 } | |
| 212 return JVMTI_ERROR_NONE; | |
| 213 } | |
| 214 | |
| 215 | |
| 216 // Support class to describe a nmethod in the CodeCache | |
| 217 | |
| 218 class nmethodDesc: public CHeapObj { | |
| 219 private: | |
| 220 methodHandle _method; | |
| 221 address _code_begin; | |
| 222 address _code_end; | |
| 223 jvmtiAddrLocationMap* _map; | |
| 224 jint _map_length; | |
| 225 public: | |
| 226 nmethodDesc(methodHandle method, address code_begin, address code_end, | |
| 227 jvmtiAddrLocationMap* map, jint map_length) { | |
| 228 _method = method; | |
| 229 _code_begin = code_begin; | |
| 230 _code_end = code_end; | |
| 231 _map = map; | |
| 232 _map_length = map_length; | |
| 233 } | |
| 234 methodHandle method() const { return _method; } | |
| 235 address code_begin() const { return _code_begin; } | |
| 236 address code_end() const { return _code_end; } | |
| 237 jvmtiAddrLocationMap* map() const { return _map; } | |
| 238 jint map_length() const { return _map_length; } | |
| 239 }; | |
| 240 | |
| 241 | |
| 242 // Support class to collect a list of the nmethod CodeBlobs in | |
| 243 // the CodeCache. | |
| 244 // | |
| 245 // Usage :- | |
| 246 // | |
| 247 // nmethodCollector collector; | |
| 248 // | |
| 249 // collector.collect(); | |
| 250 // JvmtiCodeBlobDesc* blob = collector.first(); | |
| 251 // while (blob != NULL) { | |
| 252 // : | |
| 253 // blob = collector.next(); | |
| 254 // } | |
| 255 // | |
| 256 class nmethodCollector : StackObj { | |
| 257 private: | |
| 258 GrowableArray<nmethodDesc*>* _nmethods; // collect nmethods | |
| 259 int _pos; // iteration support | |
| 260 | |
| 261 // used during a collection | |
| 262 static GrowableArray<nmethodDesc*>* _global_nmethods; | |
| 263 static void do_nmethod(nmethod* nm); | |
| 264 public: | |
| 265 nmethodCollector() { | |
| 266 _nmethods = NULL; | |
| 267 _pos = -1; | |
| 268 } | |
| 269 ~nmethodCollector() { | |
| 270 if (_nmethods != NULL) { | |
| 271 for (int i=0; i<_nmethods->length(); i++) { | |
| 272 nmethodDesc* blob = _nmethods->at(i); | |
| 273 if (blob->map()!= NULL) { | |
| 274 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, blob->map()); | |
| 275 } | |
| 276 } | |
| 277 delete _nmethods; | |
| 278 } | |
| 279 } | |
| 280 | |
| 281 // collect list of nmethods in the cache | |
| 282 void collect(); | |
| 283 | |
| 284 // iteration support - return first code blob | |
| 285 nmethodDesc* first() { | |
| 286 assert(_nmethods != NULL, "not collected"); | |
| 287 if (_nmethods->length() == 0) { | |
| 288 return NULL; | |
| 289 } | |
| 290 _pos = 0; | |
| 291 return _nmethods->at(0); | |
| 292 } | |
| 293 | |
| 294 // iteration support - return next code blob | |
| 295 nmethodDesc* next() { | |
| 296 assert(_pos >= 0, "iteration not started"); | |
| 297 if (_pos+1 >= _nmethods->length()) { | |
| 298 return NULL; | |
| 299 } | |
| 300 return _nmethods->at(++_pos); | |
| 301 } | |
| 302 }; | |
| 303 | |
| 304 // used during collection | |
| 305 GrowableArray<nmethodDesc*>* nmethodCollector::_global_nmethods; | |
| 306 | |
| 307 | |
| 308 // called for each nmethod in the CodeCache | |
| 309 // | |
| 310 // This function simply adds a descriptor for each nmethod to the global list. | |
| 311 | |
| 312 void nmethodCollector::do_nmethod(nmethod* nm) { | |
| 313 // ignore zombies | |
| 314 if (!nm->is_alive()) { | |
| 315 return; | |
| 316 } | |
| 317 | |
| 318 assert(nm->method() != NULL, "checking"); | |
| 319 | |
| 320 // create the location map for the nmethod. | |
| 321 jvmtiAddrLocationMap* map; | |
| 322 jint map_length; | |
| 323 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &map, &map_length); | |
| 324 | |
| 325 // record the nmethod details | |
| 326 methodHandle mh(nm->method()); | |
| 327 nmethodDesc* snm = new nmethodDesc(mh, | |
| 328 nm->code_begin(), | |
| 329 nm->code_end(), | |
| 330 map, | |
| 331 map_length); | |
| 332 _global_nmethods->append(snm); | |
| 333 } | |
| 334 | |
| 335 // collects a list of nmethod in the CodeCache. | |
| 336 // | |
| 337 // The created list is growable array of nmethodDesc - each one describes | |
| 338 // a nmethod and includs its JVMTI address location map. | |
| 339 | |
| 340 void nmethodCollector::collect() { | |
| 341 assert_locked_or_safepoint(CodeCache_lock); | |
| 342 assert(_global_nmethods == NULL, "checking"); | |
| 343 | |
| 344 // create the list | |
| 345 _global_nmethods = new (ResourceObj::C_HEAP) GrowableArray<nmethodDesc*>(100,true); | |
| 346 | |
| 347 // any a descriptor for each nmethod to the list. | |
| 348 CodeCache::nmethods_do(do_nmethod); | |
| 349 | |
| 350 // make the list the instance list | |
| 351 _nmethods = _global_nmethods; | |
| 352 _global_nmethods = NULL; | |
| 353 } | |
| 354 | |
| 355 // Generate a COMPILED_METHOD_LOAD event for each nnmethod | |
| 356 | |
| 357 jvmtiError JvmtiCodeBlobEvents::generate_compiled_method_load_events(JvmtiEnv* env) { | |
| 358 HandleMark hm; | |
| 359 nmethodCollector collector; | |
| 360 | |
| 361 // first collect all nmethods | |
| 362 { | |
| 363 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 364 collector.collect(); | |
| 365 } | |
| 366 | |
| 367 // iterate over the list and post an event for each nmethod | |
| 368 nmethodDesc* nm_desc = collector.first(); | |
| 369 while (nm_desc != NULL) { | |
| 370 methodOop method = nm_desc->method()(); | |
| 371 jmethodID mid = method->jmethod_id(); | |
| 372 assert(mid != NULL, "checking"); | |
| 373 JvmtiExport::post_compiled_method_load(env, mid, | |
| 374 (jint)(nm_desc->code_end() - nm_desc->code_begin()), | |
| 375 nm_desc->code_begin(), nm_desc->map_length(), | |
| 376 nm_desc->map()); | |
| 377 nm_desc = collector.next(); | |
| 378 } | |
| 379 return JVMTI_ERROR_NONE; | |
| 380 } | |
| 381 | |
| 382 | |
| 383 // create a C-heap allocated address location map for an nmethod | |
| 384 void JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nmethod *nm, | |
| 385 jvmtiAddrLocationMap** map_ptr, | |
| 386 jint *map_length_ptr) | |
| 387 { | |
| 388 ResourceMark rm; | |
| 389 jvmtiAddrLocationMap* map = NULL; | |
| 390 jint map_length = 0; | |
| 391 | |
| 392 | |
| 393 // Generate line numbers using PcDesc and ScopeDesc info | |
| 394 methodHandle mh(nm->method()); | |
| 395 | |
| 396 if (!mh->is_native()) { | |
| 397 PcDesc *pcd; | |
| 398 int pcds_in_method; | |
| 399 | |
| 400 pcds_in_method = (nm->scopes_pcs_end() - nm->scopes_pcs_begin()); | |
| 401 map = NEW_C_HEAP_ARRAY(jvmtiAddrLocationMap, pcds_in_method); | |
| 402 | |
| 403 address scopes_data = nm->scopes_data_begin(); | |
| 404 for( pcd = nm->scopes_pcs_begin(); pcd < nm->scopes_pcs_end(); ++pcd ) { | |
|
931
72088be4b386
6873116: Modify reexecute implementation to use pcDesc to record the reexecute bit
cfang
parents:
0
diff
changeset
|
405 ScopeDesc sc0(nm, pcd->scope_decode_offset(), pcd->should_reexecute()); |
| 0 | 406 ScopeDesc *sd = &sc0; |
| 407 while( !sd->is_top() ) { sd = sd->sender(); } | |
| 408 int bci = sd->bci(); | |
| 409 if (bci != InvocationEntryBci) { | |
| 410 assert(map_length < pcds_in_method, "checking"); | |
| 411 map[map_length].start_address = (const void*)pcd->real_pc(nm); | |
| 412 map[map_length].location = bci; | |
| 413 ++map_length; | |
| 414 } | |
| 415 } | |
| 416 } | |
| 417 | |
| 418 *map_ptr = map; | |
| 419 *map_length_ptr = map_length; | |
| 420 } |