Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 1250:3f5b7efb9642
6920293: OptimizeStringConcat causing core dumps
Reviewed-by: kvn, twisti
| author | never |
|---|---|
| date | Fri, 05 Feb 2010 11:07:40 -0800 |
| parents | 87684f1a88b5 |
| children | f70b0d9ab095 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1204 | 2 * Copyright 1997-2010 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/_nmethod.cpp.incl" | |
| 27 | |
| 28 #ifdef DTRACE_ENABLED | |
| 29 | |
| 30 // Only bother with this argument setup if dtrace is available | |
| 31 | |
| 32 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
| 33 const char*, int, const char*, int, const char*, int, void*, size_t); | |
| 34 | |
| 35 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
| 36 char*, int, char*, int, char*, int); | |
| 37 | |
| 38 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
| 39 { \ | |
| 40 methodOop m = (method); \ | |
| 41 if (m != NULL) { \ | |
| 42 symbolOop klass_name = m->klass_name(); \ | |
| 43 symbolOop name = m->name(); \ | |
| 44 symbolOop signature = m->signature(); \ | |
| 45 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ | |
| 46 klass_name->bytes(), klass_name->utf8_length(), \ | |
| 47 name->bytes(), name->utf8_length(), \ | |
| 48 signature->bytes(), signature->utf8_length()); \ | |
| 49 } \ | |
| 50 } | |
| 51 | |
| 52 #else // ndef DTRACE_ENABLED | |
| 53 | |
| 54 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
| 55 | |
| 56 #endif | |
| 57 | |
| 58 bool nmethod::is_compiled_by_c1() const { | |
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59 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
| 0 | 60 if (is_native_method()) return false; |
| 61 return compiler()->is_c1(); | |
| 62 } | |
| 63 bool nmethod::is_compiled_by_c2() const { | |
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64 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
| 0 | 65 if (is_native_method()) return false; |
| 66 return compiler()->is_c2(); | |
| 67 } | |
| 68 | |
| 69 | |
| 70 | |
| 71 //--------------------------------------------------------------------------------- | |
| 72 // NMethod statistics | |
| 73 // They are printed under various flags, including: | |
| 74 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
| 75 // (In the latter two cases, they like other stats are printed to the log only.) | |
| 76 | |
| 77 #ifndef PRODUCT | |
| 78 // These variables are put into one block to reduce relocations | |
| 79 // and make it simpler to print from the debugger. | |
| 80 static | |
| 81 struct nmethod_stats_struct { | |
| 82 int nmethod_count; | |
| 83 int total_size; | |
| 84 int relocation_size; | |
| 85 int code_size; | |
| 86 int stub_size; | |
| 87 int consts_size; | |
| 88 int scopes_data_size; | |
| 89 int scopes_pcs_size; | |
| 90 int dependencies_size; | |
| 91 int handler_table_size; | |
| 92 int nul_chk_table_size; | |
| 93 int oops_size; | |
| 94 | |
| 95 void note_nmethod(nmethod* nm) { | |
| 96 nmethod_count += 1; | |
| 97 total_size += nm->size(); | |
| 98 relocation_size += nm->relocation_size(); | |
| 99 code_size += nm->code_size(); | |
| 100 stub_size += nm->stub_size(); | |
| 101 consts_size += nm->consts_size(); | |
| 102 scopes_data_size += nm->scopes_data_size(); | |
| 103 scopes_pcs_size += nm->scopes_pcs_size(); | |
| 104 dependencies_size += nm->dependencies_size(); | |
| 105 handler_table_size += nm->handler_table_size(); | |
| 106 nul_chk_table_size += nm->nul_chk_table_size(); | |
| 107 oops_size += nm->oops_size(); | |
| 108 } | |
| 109 void print_nmethod_stats() { | |
| 110 if (nmethod_count == 0) return; | |
| 111 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
| 112 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
| 113 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
| 114 if (code_size != 0) tty->print_cr(" main code = %d", code_size); | |
| 115 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); | |
| 116 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); | |
| 117 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); | |
| 118 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
| 119 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
| 120 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
| 121 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
| 122 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); | |
| 123 } | |
| 124 | |
| 125 int native_nmethod_count; | |
| 126 int native_total_size; | |
| 127 int native_relocation_size; | |
| 128 int native_code_size; | |
| 129 int native_oops_size; | |
| 130 void note_native_nmethod(nmethod* nm) { | |
| 131 native_nmethod_count += 1; | |
| 132 native_total_size += nm->size(); | |
| 133 native_relocation_size += nm->relocation_size(); | |
| 134 native_code_size += nm->code_size(); | |
| 135 native_oops_size += nm->oops_size(); | |
| 136 } | |
| 137 void print_native_nmethod_stats() { | |
| 138 if (native_nmethod_count == 0) return; | |
| 139 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
| 140 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
| 141 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
| 142 if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size); | |
| 143 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); | |
| 144 } | |
| 145 | |
| 146 int pc_desc_resets; // number of resets (= number of caches) | |
| 147 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
| 148 int pc_desc_approx; // number of those which have approximate true | |
| 149 int pc_desc_repeats; // number of _last_pc_desc hits | |
| 150 int pc_desc_hits; // number of LRU cache hits | |
| 151 int pc_desc_tests; // total number of PcDesc examinations | |
| 152 int pc_desc_searches; // total number of quasi-binary search steps | |
| 153 int pc_desc_adds; // number of LUR cache insertions | |
| 154 | |
| 155 void print_pc_stats() { | |
| 156 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
| 157 pc_desc_queries, | |
| 158 (double)(pc_desc_tests + pc_desc_searches) | |
| 159 / pc_desc_queries); | |
| 160 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
| 161 pc_desc_resets, | |
| 162 pc_desc_queries, pc_desc_approx, | |
| 163 pc_desc_repeats, pc_desc_hits, | |
| 164 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
| 165 } | |
| 166 } nmethod_stats; | |
| 167 #endif //PRODUCT | |
| 168 | |
| 169 //--------------------------------------------------------------------------------- | |
| 170 | |
| 171 | |
| 172 // The _unwind_handler is a special marker address, which says that | |
| 173 // for given exception oop and address, the frame should be removed | |
| 174 // as the tuple cannot be caught in the nmethod | |
| 175 address ExceptionCache::_unwind_handler = (address) -1; | |
| 176 | |
| 177 | |
| 178 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
| 179 assert(pc != NULL, "Must be non null"); | |
| 180 assert(exception.not_null(), "Must be non null"); | |
| 181 assert(handler != NULL, "Must be non null"); | |
| 182 | |
| 183 _count = 0; | |
| 184 _exception_type = exception->klass(); | |
| 185 _next = NULL; | |
| 186 | |
| 187 add_address_and_handler(pc,handler); | |
| 188 } | |
| 189 | |
| 190 | |
| 191 address ExceptionCache::match(Handle exception, address pc) { | |
| 192 assert(pc != NULL,"Must be non null"); | |
| 193 assert(exception.not_null(),"Must be non null"); | |
| 194 if (exception->klass() == exception_type()) { | |
| 195 return (test_address(pc)); | |
| 196 } | |
| 197 | |
| 198 return NULL; | |
| 199 } | |
| 200 | |
| 201 | |
| 202 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
| 203 assert(exception.not_null(),"Must be non null"); | |
| 204 if (exception->klass() == exception_type() && count() < cache_size) { | |
| 205 return true; | |
| 206 } | |
| 207 return false; | |
| 208 } | |
| 209 | |
| 210 | |
| 211 address ExceptionCache::test_address(address addr) { | |
| 212 for (int i=0; i<count(); i++) { | |
| 213 if (pc_at(i) == addr) { | |
| 214 return handler_at(i); | |
| 215 } | |
| 216 } | |
| 217 return NULL; | |
| 218 } | |
| 219 | |
| 220 | |
| 221 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
| 222 if (test_address(addr) == handler) return true; | |
| 223 if (count() < cache_size) { | |
| 224 set_pc_at(count(),addr); | |
| 225 set_handler_at(count(), handler); | |
| 226 increment_count(); | |
| 227 return true; | |
| 228 } | |
| 229 return false; | |
| 230 } | |
| 231 | |
| 232 | |
| 233 // private method for handling exception cache | |
| 234 // These methods are private, and used to manipulate the exception cache | |
| 235 // directly. | |
| 236 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
| 237 ExceptionCache* ec = exception_cache(); | |
| 238 while (ec != NULL) { | |
| 239 if (ec->match_exception_with_space(exception)) { | |
| 240 return ec; | |
| 241 } | |
| 242 ec = ec->next(); | |
| 243 } | |
| 244 return NULL; | |
| 245 } | |
| 246 | |
| 247 | |
| 248 //----------------------------------------------------------------------------- | |
| 249 | |
| 250 | |
| 251 // Helper used by both find_pc_desc methods. | |
| 252 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
| 253 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
| 254 if (!approximate) | |
| 255 return pc->pc_offset() == pc_offset; | |
| 256 else | |
| 257 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
| 258 } | |
| 259 | |
| 260 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
| 261 if (initial_pc_desc == NULL) { | |
| 262 _last_pc_desc = NULL; // native method | |
| 263 return; | |
| 264 } | |
| 265 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
| 266 // reset the cache by filling it with benign (non-null) values | |
| 267 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
| 268 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
| 269 for (int i = 0; i < cache_size; i++) | |
| 270 _pc_descs[i] = initial_pc_desc; | |
| 271 } | |
| 272 | |
| 273 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
| 274 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
| 275 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
| 276 | |
| 277 // In order to prevent race conditions do not load cache elements | |
| 278 // repeatedly, but use a local copy: | |
| 279 PcDesc* res; | |
| 280 | |
| 281 // Step one: Check the most recently returned value. | |
| 282 res = _last_pc_desc; | |
| 283 if (res == NULL) return NULL; // native method; no PcDescs at all | |
| 284 if (match_desc(res, pc_offset, approximate)) { | |
| 285 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
| 286 return res; | |
| 287 } | |
| 288 | |
| 289 // Step two: Check the LRU cache. | |
| 290 for (int i = 0; i < cache_size; i++) { | |
| 291 res = _pc_descs[i]; | |
| 292 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
| 293 if (match_desc(res, pc_offset, approximate)) { | |
| 294 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
| 295 _last_pc_desc = res; // record this cache hit in case of repeat | |
| 296 return res; | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 // Report failure. | |
| 301 return NULL; | |
| 302 } | |
| 303 | |
| 304 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
| 305 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
| 306 // Update the LRU cache by shifting pc_desc forward: | |
| 307 for (int i = 0; i < cache_size; i++) { | |
| 308 PcDesc* next = _pc_descs[i]; | |
| 309 _pc_descs[i] = pc_desc; | |
| 310 pc_desc = next; | |
| 311 } | |
| 312 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
| 313 } | |
| 314 | |
| 315 // adjust pcs_size so that it is a multiple of both oopSize and | |
| 316 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
| 317 // of oopSize, then 2*sizeof(PcDesc) is) | |
| 318 static int adjust_pcs_size(int pcs_size) { | |
| 319 int nsize = round_to(pcs_size, oopSize); | |
| 320 if ((nsize % sizeof(PcDesc)) != 0) { | |
| 321 nsize = pcs_size + sizeof(PcDesc); | |
| 322 } | |
| 323 assert((nsize % oopSize) == 0, "correct alignment"); | |
| 324 return nsize; | |
| 325 } | |
| 326 | |
| 327 //----------------------------------------------------------------------------- | |
| 328 | |
| 329 | |
| 330 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
| 331 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
| 332 assert(new_entry != NULL,"Must be non null"); | |
| 333 assert(new_entry->next() == NULL, "Must be null"); | |
| 334 | |
| 335 if (exception_cache() != NULL) { | |
| 336 new_entry->set_next(exception_cache()); | |
| 337 } | |
| 338 set_exception_cache(new_entry); | |
| 339 } | |
| 340 | |
| 341 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
| 342 ExceptionCache* prev = NULL; | |
| 343 ExceptionCache* curr = exception_cache(); | |
| 344 assert(curr != NULL, "nothing to remove"); | |
| 345 // find the previous and next entry of ec | |
| 346 while (curr != ec) { | |
| 347 prev = curr; | |
| 348 curr = curr->next(); | |
| 349 assert(curr != NULL, "ExceptionCache not found"); | |
| 350 } | |
| 351 // now: curr == ec | |
| 352 ExceptionCache* next = curr->next(); | |
| 353 if (prev == NULL) { | |
| 354 set_exception_cache(next); | |
| 355 } else { | |
| 356 prev->set_next(next); | |
| 357 } | |
| 358 delete curr; | |
| 359 } | |
| 360 | |
| 361 | |
| 362 // public method for accessing the exception cache | |
| 363 // These are the public access methods. | |
| 364 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
| 365 // We never grab a lock to read the exception cache, so we may | |
| 366 // have false negatives. This is okay, as it can only happen during | |
| 367 // the first few exception lookups for a given nmethod. | |
| 368 ExceptionCache* ec = exception_cache(); | |
| 369 while (ec != NULL) { | |
| 370 address ret_val; | |
| 371 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
| 372 return ret_val; | |
| 373 } | |
| 374 ec = ec->next(); | |
| 375 } | |
| 376 return NULL; | |
| 377 } | |
| 378 | |
| 379 | |
| 380 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
| 381 // There are potential race conditions during exception cache updates, so we | |
| 382 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
| 605 | 383 // we don't lock during reads, it is possible to have several threads attempt |
| 0 | 384 // to update the cache with the same data. We need to check for already inserted |
| 385 // copies of the current data before adding it. | |
| 386 | |
| 387 MutexLocker ml(ExceptionCache_lock); | |
| 388 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
| 389 | |
| 390 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
| 391 target_entry = new ExceptionCache(exception,pc,handler); | |
| 392 add_exception_cache_entry(target_entry); | |
| 393 } | |
| 394 } | |
| 395 | |
| 396 | |
| 397 //-------------end of code for ExceptionCache-------------- | |
| 398 | |
| 399 | |
| 400 void nmFlags::clear() { | |
| 401 assert(sizeof(nmFlags) == sizeof(int), "using more than one word for nmFlags"); | |
| 402 *(jint*)this = 0; | |
| 403 } | |
| 404 | |
| 405 int nmethod::total_size() const { | |
| 406 return | |
| 407 code_size() + | |
| 408 stub_size() + | |
| 409 consts_size() + | |
| 410 scopes_data_size() + | |
| 411 scopes_pcs_size() + | |
| 412 handler_table_size() + | |
| 413 nul_chk_table_size(); | |
| 414 } | |
| 415 | |
| 416 const char* nmethod::compile_kind() const { | |
| 417 if (is_osr_method()) return "osr"; | |
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418 if (method() != NULL && is_native_method()) return "c2n"; |
| 0 | 419 return NULL; |
| 420 } | |
| 421 | |
| 422 // %%% This variable is no longer used? | |
| 423 int nmethod::_zombie_instruction_size = NativeJump::instruction_size; | |
| 424 | |
| 425 | |
| 426 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
| 427 CodeBuffer *code_buffer, | |
| 428 int vep_offset, | |
| 429 int frame_complete, | |
| 430 int frame_size, | |
| 431 ByteSize basic_lock_owner_sp_offset, | |
| 432 ByteSize basic_lock_sp_offset, | |
| 433 OopMapSet* oop_maps) { | |
| 434 // create nmethod | |
| 435 nmethod* nm = NULL; | |
| 436 { | |
| 437 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 438 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
| 439 CodeOffsets offsets; | |
| 440 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
| 441 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
| 442 nm = new (native_nmethod_size) | |
| 443 nmethod(method(), native_nmethod_size, &offsets, | |
| 444 code_buffer, frame_size, | |
| 445 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
| 446 oop_maps); | |
| 447 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
| 448 if (PrintAssembly && nm != NULL) | |
| 449 Disassembler::decode(nm); | |
| 450 } | |
| 451 // verify nmethod | |
| 452 debug_only(if (nm) nm->verify();) // might block | |
| 453 | |
| 454 if (nm != NULL) { | |
| 455 nm->log_new_nmethod(); | |
| 456 } | |
| 457 | |
| 458 return nm; | |
| 459 } | |
| 460 | |
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461 #ifdef HAVE_DTRACE_H |
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462 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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463 CodeBuffer *code_buffer, |
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464 int vep_offset, |
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465 int trap_offset, |
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466 int frame_complete, |
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467 int frame_size) { |
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468 // create nmethod |
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469 nmethod* nm = NULL; |
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470 { |
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471 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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472 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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473 CodeOffsets offsets; |
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474 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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475 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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476 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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477 |
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478 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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479 |
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480 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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481 if (PrintAssembly && nm != NULL) |
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482 Disassembler::decode(nm); |
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483 } |
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484 // verify nmethod |
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485 debug_only(if (nm) nm->verify();) // might block |
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486 |
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487 if (nm != NULL) { |
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488 nm->log_new_nmethod(); |
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489 } |
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490 |
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491 return nm; |
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492 } |
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493 |
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494 #endif // def HAVE_DTRACE_H |
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495 |
| 0 | 496 nmethod* nmethod::new_nmethod(methodHandle method, |
| 497 int compile_id, | |
| 498 int entry_bci, | |
| 499 CodeOffsets* offsets, | |
| 500 int orig_pc_offset, | |
| 501 DebugInformationRecorder* debug_info, | |
| 502 Dependencies* dependencies, | |
| 503 CodeBuffer* code_buffer, int frame_size, | |
| 504 OopMapSet* oop_maps, | |
| 505 ExceptionHandlerTable* handler_table, | |
| 506 ImplicitExceptionTable* nul_chk_table, | |
| 507 AbstractCompiler* compiler, | |
| 508 int comp_level | |
| 509 ) | |
| 510 { | |
| 511 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 512 // create nmethod | |
| 513 nmethod* nm = NULL; | |
| 514 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 515 int nmethod_size = | |
| 516 allocation_size(code_buffer, sizeof(nmethod)) | |
| 517 + adjust_pcs_size(debug_info->pcs_size()) | |
| 518 + round_to(dependencies->size_in_bytes() , oopSize) | |
| 519 + round_to(handler_table->size_in_bytes(), oopSize) | |
| 520 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
| 521 + round_to(debug_info->data_size() , oopSize); | |
| 522 nm = new (nmethod_size) | |
| 523 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
| 524 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
| 525 oop_maps, | |
| 526 handler_table, | |
| 527 nul_chk_table, | |
| 528 compiler, | |
| 529 comp_level); | |
| 530 if (nm != NULL) { | |
| 531 // To make dependency checking during class loading fast, record | |
| 532 // the nmethod dependencies in the classes it is dependent on. | |
| 533 // This allows the dependency checking code to simply walk the | |
| 534 // class hierarchy above the loaded class, checking only nmethods | |
| 535 // which are dependent on those classes. The slow way is to | |
| 536 // check every nmethod for dependencies which makes it linear in | |
| 537 // the number of methods compiled. For applications with a lot | |
| 538 // classes the slow way is too slow. | |
| 539 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
| 540 klassOop klass = deps.context_type(); | |
| 541 if (klass == NULL) continue; // ignore things like evol_method | |
| 542 | |
| 543 // record this nmethod as dependent on this klass | |
| 544 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
| 545 } | |
| 546 } | |
| 547 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
| 548 if (PrintAssembly && nm != NULL) | |
| 549 Disassembler::decode(nm); | |
| 550 } | |
| 551 | |
| 552 // verify nmethod | |
| 553 debug_only(if (nm) nm->verify();) // might block | |
| 554 | |
| 555 if (nm != NULL) { | |
| 556 nm->log_new_nmethod(); | |
| 557 } | |
| 558 | |
| 559 // done | |
| 560 return nm; | |
| 561 } | |
| 562 | |
| 563 | |
| 564 // For native wrappers | |
| 565 nmethod::nmethod( | |
| 566 methodOop method, | |
| 567 int nmethod_size, | |
| 568 CodeOffsets* offsets, | |
| 569 CodeBuffer* code_buffer, | |
| 570 int frame_size, | |
| 571 ByteSize basic_lock_owner_sp_offset, | |
| 572 ByteSize basic_lock_sp_offset, | |
| 573 OopMapSet* oop_maps ) | |
| 574 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
| 575 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 576 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), | |
| 577 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) | |
| 578 { | |
| 579 { | |
| 580 debug_only(No_Safepoint_Verifier nsv;) | |
| 581 assert_locked_or_safepoint(CodeCache_lock); | |
| 582 | |
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583 NOT_PRODUCT(_has_debug_info = false); |
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584 _oops_do_mark_link = NULL; |
| 0 | 585 _method = method; |
| 586 _entry_bci = InvocationEntryBci; | |
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587 _osr_link = NULL; |
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588 _scavenge_root_link = NULL; |
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589 _scavenge_root_state = 0; |
| 1202 | 590 _saved_nmethod_link = NULL; |
| 0 | 591 _compiler = NULL; |
| 592 // We have no exception handler or deopt handler make the | |
| 593 // values something that will never match a pc like the nmethod vtable entry | |
| 594 _exception_offset = 0; | |
| 595 _deoptimize_offset = 0; | |
| 1204 | 596 _deoptimize_mh_offset = 0; |
| 0 | 597 _orig_pc_offset = 0; |
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598 #ifdef HAVE_DTRACE_H |
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599 _trap_offset = 0; |
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600 #endif // def HAVE_DTRACE_H |
| 0 | 601 _stub_offset = data_offset(); |
| 602 _consts_offset = data_offset(); | |
| 603 _scopes_data_offset = data_offset(); | |
| 604 _scopes_pcs_offset = _scopes_data_offset; | |
| 605 _dependencies_offset = _scopes_pcs_offset; | |
| 606 _handler_table_offset = _dependencies_offset; | |
| 607 _nul_chk_table_offset = _handler_table_offset; | |
| 608 _nmethod_end_offset = _nul_chk_table_offset; | |
| 609 _compile_id = 0; // default | |
| 610 _comp_level = CompLevel_none; | |
| 611 _entry_point = instructions_begin(); | |
| 612 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 613 _osr_entry_point = NULL; | |
| 614 _exception_cache = NULL; | |
| 615 _pc_desc_cache.reset_to(NULL); | |
| 616 | |
| 617 flags.clear(); | |
| 618 flags.state = alive; | |
| 619 _markedForDeoptimization = 0; | |
| 620 | |
| 621 _lock_count = 0; | |
| 622 _stack_traversal_mark = 0; | |
| 623 | |
| 624 code_buffer->copy_oops_to(this); | |
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625 debug_only(verify_scavenge_root_oops()); |
| 0 | 626 CodeCache::commit(this); |
| 627 VTune::create_nmethod(this); | |
| 628 } | |
| 629 | |
| 630 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
| 631 ttyLocker ttyl; // keep the following output all in one block | |
| 632 // This output goes directly to the tty, not the compiler log. | |
| 633 // To enable tools to match it up with the compilation activity, | |
| 634 // be sure to tag this tty output with the compile ID. | |
| 635 if (xtty != NULL) { | |
| 636 xtty->begin_head("print_native_nmethod"); | |
| 637 xtty->method(_method); | |
| 638 xtty->stamp(); | |
| 639 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 640 } | |
| 641 // print the header part first | |
| 642 print(); | |
| 643 // then print the requested information | |
| 644 if (PrintNativeNMethods) { | |
| 645 print_code(); | |
| 646 oop_maps->print(); | |
| 647 } | |
| 648 if (PrintRelocations) { | |
| 649 print_relocations(); | |
| 650 } | |
| 651 if (xtty != NULL) { | |
| 652 xtty->tail("print_native_nmethod"); | |
| 653 } | |
| 654 } | |
| 655 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 656 } | |
| 657 | |
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658 // For dtrace wrappers |
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659 #ifdef HAVE_DTRACE_H |
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660 nmethod::nmethod( |
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661 methodOop method, |
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662 int nmethod_size, |
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663 CodeOffsets* offsets, |
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664 CodeBuffer* code_buffer, |
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665 int frame_size) |
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666 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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667 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
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668 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
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669 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
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670 { |
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671 { |
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672 debug_only(No_Safepoint_Verifier nsv;) |
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673 assert_locked_or_safepoint(CodeCache_lock); |
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674 |
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675 NOT_PRODUCT(_has_debug_info = false); |
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676 _oops_do_mark_link = NULL; |
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677 _method = method; |
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678 _entry_bci = InvocationEntryBci; |
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679 _osr_link = NULL; |
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680 _scavenge_root_link = NULL; |
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681 _scavenge_root_state = 0; |
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682 _compiler = NULL; |
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683 // We have no exception handler or deopt handler make the |
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684 // values something that will never match a pc like the nmethod vtable entry |
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685 _exception_offset = 0; |
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686 _deoptimize_offset = 0; |
| 1204 | 687 _deoptimize_mh_offset = 0; |
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688 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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689 _orig_pc_offset = 0; |
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690 _stub_offset = data_offset(); |
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691 _consts_offset = data_offset(); |
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692 _scopes_data_offset = data_offset(); |
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693 _scopes_pcs_offset = _scopes_data_offset; |
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694 _dependencies_offset = _scopes_pcs_offset; |
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695 _handler_table_offset = _dependencies_offset; |
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696 _nul_chk_table_offset = _handler_table_offset; |
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697 _nmethod_end_offset = _nul_chk_table_offset; |
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698 _compile_id = 0; // default |
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699 _comp_level = CompLevel_none; |
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700 _entry_point = instructions_begin(); |
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701 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
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702 _osr_entry_point = NULL; |
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703 _exception_cache = NULL; |
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704 _pc_desc_cache.reset_to(NULL); |
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705 |
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706 flags.clear(); |
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707 flags.state = alive; |
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708 _markedForDeoptimization = 0; |
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709 |
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710 _lock_count = 0; |
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711 _stack_traversal_mark = 0; |
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712 |
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713 code_buffer->copy_oops_to(this); |
|
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714 debug_only(verify_scavenge_root_oops()); |
|
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715 CodeCache::commit(this); |
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716 VTune::create_nmethod(this); |
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717 } |
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718 |
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719 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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720 ttyLocker ttyl; // keep the following output all in one block |
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721 // This output goes directly to the tty, not the compiler log. |
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722 // To enable tools to match it up with the compilation activity, |
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723 // be sure to tag this tty output with the compile ID. |
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724 if (xtty != NULL) { |
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725 xtty->begin_head("print_dtrace_nmethod"); |
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726 xtty->method(_method); |
|
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727 xtty->stamp(); |
|
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728 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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729 } |
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730 // print the header part first |
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731 print(); |
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732 // then print the requested information |
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733 if (PrintNMethods) { |
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734 print_code(); |
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735 } |
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736 if (PrintRelocations) { |
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737 print_relocations(); |
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738 } |
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739 if (xtty != NULL) { |
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740 xtty->tail("print_dtrace_nmethod"); |
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741 } |
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742 } |
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743 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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744 } |
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745 #endif // def HAVE_DTRACE_H |
| 0 | 746 |
| 747 void* nmethod::operator new(size_t size, int nmethod_size) { | |
| 748 // Always leave some room in the CodeCache for I2C/C2I adapters | |
| 749 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
| 750 return CodeCache::allocate(nmethod_size); | |
| 751 } | |
| 752 | |
| 753 | |
| 754 nmethod::nmethod( | |
| 755 methodOop method, | |
| 756 int nmethod_size, | |
| 757 int compile_id, | |
| 758 int entry_bci, | |
| 759 CodeOffsets* offsets, | |
| 760 int orig_pc_offset, | |
| 761 DebugInformationRecorder* debug_info, | |
| 762 Dependencies* dependencies, | |
| 763 CodeBuffer *code_buffer, | |
| 764 int frame_size, | |
| 765 OopMapSet* oop_maps, | |
| 766 ExceptionHandlerTable* handler_table, | |
| 767 ImplicitExceptionTable* nul_chk_table, | |
| 768 AbstractCompiler* compiler, | |
| 769 int comp_level | |
| 770 ) | |
| 771 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
| 772 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 773 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), | |
| 774 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) | |
| 775 { | |
| 776 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 777 { | |
| 778 debug_only(No_Safepoint_Verifier nsv;) | |
| 779 assert_locked_or_safepoint(CodeCache_lock); | |
| 780 | |
|
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781 NOT_PRODUCT(_has_debug_info = false); |
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782 _oops_do_mark_link = NULL; |
| 0 | 783 _method = method; |
| 784 _compile_id = compile_id; | |
| 785 _comp_level = comp_level; | |
| 786 _entry_bci = entry_bci; | |
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787 _osr_link = NULL; |
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788 _scavenge_root_link = NULL; |
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789 _scavenge_root_state = 0; |
| 0 | 790 _compiler = compiler; |
| 791 _orig_pc_offset = orig_pc_offset; | |
|
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792 #ifdef HAVE_DTRACE_H |
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793 _trap_offset = 0; |
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794 #endif // def HAVE_DTRACE_H |
| 0 | 795 _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); |
| 796 | |
| 797 // Exception handler and deopt handler are in the stub section | |
| 798 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); | |
| 799 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
| 1204 | 800 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
| 0 | 801 _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); |
| 802 _scopes_data_offset = data_offset(); | |
| 803 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); | |
| 804 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); | |
| 805 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
| 806 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
| 807 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
| 808 | |
| 809 _entry_point = instructions_begin(); | |
| 810 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 811 _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
| 812 _exception_cache = NULL; | |
| 813 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
| 814 | |
| 815 flags.clear(); | |
| 816 flags.state = alive; | |
| 817 _markedForDeoptimization = 0; | |
| 818 | |
| 819 _unload_reported = false; // jvmti state | |
| 820 | |
| 821 _lock_count = 0; | |
| 822 _stack_traversal_mark = 0; | |
| 823 | |
| 824 // Copy contents of ScopeDescRecorder to nmethod | |
| 825 code_buffer->copy_oops_to(this); | |
| 826 debug_info->copy_to(this); | |
| 827 dependencies->copy_to(this); | |
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828 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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829 CodeCache::add_scavenge_root_nmethod(this); |
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830 } |
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831 debug_only(verify_scavenge_root_oops()); |
| 0 | 832 |
| 833 CodeCache::commit(this); | |
| 834 | |
| 835 VTune::create_nmethod(this); | |
| 836 | |
| 837 // Copy contents of ExceptionHandlerTable to nmethod | |
| 838 handler_table->copy_to(this); | |
| 839 nul_chk_table->copy_to(this); | |
| 840 | |
| 841 // we use the information of entry points to find out if a method is | |
| 842 // static or non static | |
| 843 assert(compiler->is_c2() || | |
| 844 _method->is_static() == (entry_point() == _verified_entry_point), | |
| 845 " entry points must be same for static methods and vice versa"); | |
| 846 } | |
| 847 | |
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848 bool printnmethods = PrintNMethods |
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849 || CompilerOracle::should_print(_method) |
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850 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
| 0 | 851 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
| 852 print_nmethod(printnmethods); | |
| 853 } | |
| 854 | |
| 855 // Note: Do not verify in here as the CodeCache_lock is | |
| 856 // taken which would conflict with the CompiledIC_lock | |
| 857 // which taken during the verification of call sites. | |
| 858 // (was bug - gri 10/25/99) | |
| 859 | |
| 860 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 861 } | |
| 862 | |
| 863 | |
| 864 // Print a short set of xml attributes to identify this nmethod. The | |
| 865 // output should be embedded in some other element. | |
| 866 void nmethod::log_identity(xmlStream* log) const { | |
| 867 log->print(" compile_id='%d'", compile_id()); | |
| 868 const char* nm_kind = compile_kind(); | |
| 869 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
| 870 if (compiler() != NULL) { | |
| 871 log->print(" compiler='%s'", compiler()->name()); | |
| 872 } | |
| 873 #ifdef TIERED | |
| 874 log->print(" level='%d'", comp_level()); | |
| 875 #endif // TIERED | |
| 876 } | |
| 877 | |
| 878 | |
| 879 #define LOG_OFFSET(log, name) \ | |
| 880 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
| 881 log->print(" " XSTR(name) "_offset='%d'" , \ | |
| 882 (intptr_t)name##_begin() - (intptr_t)this) | |
| 883 | |
| 884 | |
| 885 void nmethod::log_new_nmethod() const { | |
| 886 if (LogCompilation && xtty != NULL) { | |
| 887 ttyLocker ttyl; | |
| 888 HandleMark hm; | |
| 889 xtty->begin_elem("nmethod"); | |
| 890 log_identity(xtty); | |
| 891 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", | |
| 892 instructions_begin(), size()); | |
| 893 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 894 | |
| 895 LOG_OFFSET(xtty, relocation); | |
| 896 LOG_OFFSET(xtty, code); | |
| 897 LOG_OFFSET(xtty, stub); | |
| 898 LOG_OFFSET(xtty, consts); | |
| 899 LOG_OFFSET(xtty, scopes_data); | |
| 900 LOG_OFFSET(xtty, scopes_pcs); | |
| 901 LOG_OFFSET(xtty, dependencies); | |
| 902 LOG_OFFSET(xtty, handler_table); | |
| 903 LOG_OFFSET(xtty, nul_chk_table); | |
| 904 LOG_OFFSET(xtty, oops); | |
| 905 | |
| 906 xtty->method(method()); | |
| 907 xtty->stamp(); | |
| 908 xtty->end_elem(); | |
| 909 } | |
| 910 } | |
| 911 | |
| 912 #undef LOG_OFFSET | |
| 913 | |
| 914 | |
| 915 // Print out more verbose output usually for a newly created nmethod. | |
| 916 void nmethod::print_on(outputStream* st, const char* title) const { | |
| 917 if (st != NULL) { | |
| 918 ttyLocker ttyl; | |
| 919 // Print a little tag line that looks like +PrintCompilation output: | |
|
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920 int tlen = (int) strlen(title); |
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921 bool do_nl = false; |
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922 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } |
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923 st->print("%3d%c %.*s", |
| 0 | 924 compile_id(), |
| 925 is_osr_method() ? '%' : | |
| 926 method() != NULL && | |
| 927 is_native_method() ? 'n' : ' ', | |
|
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928 tlen, title); |
| 0 | 929 #ifdef TIERED |
| 930 st->print(" (%d) ", comp_level()); | |
| 931 #endif // TIERED | |
| 932 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); | |
|
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933 if (Universe::heap()->is_gc_active() && method() != NULL) { |
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934 st->print("(method)"); |
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935 } else if (method() != NULL) { |
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936 method()->print_short_name(st); |
| 0 | 937 if (is_osr_method()) |
| 938 st->print(" @ %d", osr_entry_bci()); | |
| 939 if (method()->code_size() > 0) | |
| 940 st->print(" (%d bytes)", method()->code_size()); | |
| 941 } | |
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942 |
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943 if (do_nl) st->cr(); |
| 0 | 944 } |
| 945 } | |
| 946 | |
| 947 | |
| 948 void nmethod::print_nmethod(bool printmethod) { | |
| 949 ttyLocker ttyl; // keep the following output all in one block | |
| 950 if (xtty != NULL) { | |
| 951 xtty->begin_head("print_nmethod"); | |
| 952 xtty->stamp(); | |
| 953 xtty->end_head(); | |
| 954 } | |
| 955 // print the header part first | |
| 956 print(); | |
| 957 // then print the requested information | |
| 958 if (printmethod) { | |
| 959 print_code(); | |
| 960 print_pcs(); | |
| 961 oop_maps()->print(); | |
| 962 } | |
| 963 if (PrintDebugInfo) { | |
| 964 print_scopes(); | |
| 965 } | |
| 966 if (PrintRelocations) { | |
| 967 print_relocations(); | |
| 968 } | |
| 969 if (PrintDependencies) { | |
| 970 print_dependencies(); | |
| 971 } | |
| 972 if (PrintExceptionHandlers) { | |
| 973 print_handler_table(); | |
| 974 print_nul_chk_table(); | |
| 975 } | |
| 976 if (xtty != NULL) { | |
| 977 xtty->tail("print_nmethod"); | |
| 978 } | |
| 979 } | |
| 980 | |
| 981 | |
| 982 void nmethod::set_version(int v) { | |
| 983 flags.version = v; | |
| 984 } | |
| 985 | |
| 986 | |
| 987 ScopeDesc* nmethod::scope_desc_at(address pc) { | |
| 988 PcDesc* pd = pc_desc_at(pc); | |
| 989 guarantee(pd != NULL, "scope must be present"); | |
| 990 return new ScopeDesc(this, pd->scope_decode_offset(), | |
|
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991 pd->obj_decode_offset(), pd->should_reexecute()); |
| 0 | 992 } |
| 993 | |
| 994 | |
| 995 void nmethod::clear_inline_caches() { | |
| 996 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
| 997 if (is_zombie()) { | |
| 998 return; | |
| 999 } | |
| 1000 | |
| 1001 RelocIterator iter(this); | |
| 1002 while (iter.next()) { | |
| 1003 iter.reloc()->clear_inline_cache(); | |
| 1004 } | |
| 1005 } | |
| 1006 | |
| 1007 | |
| 1008 void nmethod::cleanup_inline_caches() { | |
| 1009 | |
| 1010 assert(SafepointSynchronize::is_at_safepoint() && | |
| 1011 !CompiledIC_lock->is_locked() && | |
| 1012 !Patching_lock->is_locked(), "no threads must be updating the inline caches by them selfs"); | |
| 1013 | |
| 1014 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1015 // first few bytes. If an oop in the old code was there, that oop | |
| 1016 // should not get GC'd. Skip the first few bytes of oops on | |
| 1017 // not-entrant methods. | |
| 1018 address low_boundary = verified_entry_point(); | |
| 1019 if (!is_in_use()) { | |
| 1020 low_boundary += NativeJump::instruction_size; | |
| 1021 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1022 // This means that the low_boundary is going to be a little too high. | |
| 1023 // This shouldn't matter, since oops of non-entrant methods are never used. | |
| 1024 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
| 1025 } | |
| 1026 | |
| 1027 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
| 1028 ResourceMark rm; | |
| 1029 RelocIterator iter(this, low_boundary); | |
| 1030 while(iter.next()) { | |
| 1031 switch(iter.type()) { | |
| 1032 case relocInfo::virtual_call_type: | |
| 1033 case relocInfo::opt_virtual_call_type: { | |
| 1034 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1035 // Ok, to lookup references to zombies here | |
| 1036 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
| 1037 if( cb != NULL && cb->is_nmethod() ) { | |
| 1038 nmethod* nm = (nmethod*)cb; | |
| 1039 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1040 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
| 0 | 1041 } |
| 1042 break; | |
| 1043 } | |
| 1044 case relocInfo::static_call_type: { | |
| 1045 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
| 1046 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
| 1047 if( cb != NULL && cb->is_nmethod() ) { | |
| 1048 nmethod* nm = (nmethod*)cb; | |
| 1049 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1050 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
| 0 | 1051 } |
| 1052 break; | |
| 1053 } | |
| 1054 } | |
| 1055 } | |
| 1056 } | |
| 1057 | |
|
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1058 // This is a private interface with the sweeper. |
| 0 | 1059 void nmethod::mark_as_seen_on_stack() { |
| 1060 assert(is_not_entrant(), "must be a non-entrant method"); | |
| 1061 set_stack_traversal_mark(NMethodSweeper::traversal_count()); | |
| 1062 } | |
| 1063 | |
| 1064 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
| 1065 bool nmethod::can_not_entrant_be_converted() { | |
| 1066 assert(is_not_entrant(), "must be a non-entrant method"); | |
| 1067 assert(SafepointSynchronize::is_at_safepoint(), "must be called during a safepoint"); | |
| 1068 | |
| 1069 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
| 1070 // count can be greater than the stack traversal count before it hits the | |
| 1071 // nmethod for the second time. | |
| 1072 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
| 1073 } | |
| 1074 | |
| 1075 void nmethod::inc_decompile_count() { | |
| 1076 // Could be gated by ProfileTraps, but do not bother... | |
| 1077 methodOop m = method(); | |
| 1078 if (m == NULL) return; | |
| 1079 methodDataOop mdo = m->method_data(); | |
| 1080 if (mdo == NULL) return; | |
| 1081 // There is a benign race here. See comments in methodDataOop.hpp. | |
| 1082 mdo->inc_decompile_count(); | |
| 1083 } | |
| 1084 | |
| 1085 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
| 1086 | |
| 1087 post_compiled_method_unload(); | |
| 1088 | |
| 1089 // Since this nmethod is being unloaded, make sure that dependencies | |
| 1090 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
| 1091 // indicate that this work is being done during a GC. | |
| 1092 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
| 1093 assert(is_alive != NULL, "Should be non-NULL"); | |
| 1094 // A non-NULL is_alive closure indicates that this is being called during GC. | |
| 1095 flush_dependencies(is_alive); | |
| 1096 | |
| 1097 // Break cycle between nmethod & method | |
| 1098 if (TraceClassUnloading && WizardMode) { | |
| 1099 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
| 1100 " unloadable], methodOop(" INTPTR_FORMAT | |
| 1101 "), cause(" INTPTR_FORMAT ")", | |
| 1102 this, (address)_method, (address)cause); | |
|
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1103 if (!Universe::heap()->is_gc_active()) |
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1104 cause->klass()->print(); |
| 0 | 1105 } |
| 941 | 1106 // Unlink the osr method, so we do not look this up again |
| 1107 if (is_osr_method()) { | |
| 1108 invalidate_osr_method(); | |
| 1109 } | |
| 0 | 1110 // If _method is already NULL the methodOop is about to be unloaded, |
| 1111 // so we don't have to break the cycle. Note that it is possible to | |
| 1112 // have the methodOop live here, in case we unload the nmethod because | |
| 1113 // it is pointing to some oop (other than the methodOop) being unloaded. | |
| 1114 if (_method != NULL) { | |
| 1115 // OSR methods point to the methodOop, but the methodOop does not | |
| 1116 // point back! | |
| 1117 if (_method->code() == this) { | |
| 1118 _method->clear_code(); // Break a cycle | |
| 1119 } | |
| 1120 _method = NULL; // Clear the method of this dead nmethod | |
| 1121 } | |
| 1122 // Make the class unloaded - i.e., change state and notify sweeper | |
| 1123 check_safepoint(); | |
| 1124 if (is_in_use()) { | |
| 1125 // Transitioning directly from live to unloaded -- so | |
| 1126 // we need to force a cache clean-up; remember this | |
| 1127 // for later on. | |
| 1128 CodeCache::set_needs_cache_clean(true); | |
| 1129 } | |
| 1130 flags.state = unloaded; | |
| 1131 | |
|
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1132 // Log the unloading. |
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1133 log_state_change(); |
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1134 |
| 0 | 1135 // The methodOop is gone at this point |
| 1136 assert(_method == NULL, "Tautology"); | |
| 1137 | |
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1138 set_osr_link(NULL); |
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1139 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
| 0 | 1140 NMethodSweeper::notify(this); |
| 1141 } | |
| 1142 | |
| 1143 void nmethod::invalidate_osr_method() { | |
| 1144 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
| 1145 // Remove from list of active nmethods | |
| 1146 if (method() != NULL) | |
| 1147 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
| 1148 // Set entry as invalid | |
| 1149 _entry_bci = InvalidOSREntryBci; | |
| 1150 } | |
| 1151 | |
|
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1152 void nmethod::log_state_change() const { |
| 0 | 1153 if (LogCompilation) { |
| 1154 if (xtty != NULL) { | |
| 1155 ttyLocker ttyl; // keep the following output all in one block | |
|
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1156 if (flags.state == unloaded) { |
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1157 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1158 os::current_thread_id()); |
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1159 } else { |
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1160 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1161 os::current_thread_id(), |
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1162 (flags.state == zombie ? " zombie='1'" : "")); |
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1163 } |
| 0 | 1164 log_identity(xtty); |
| 1165 xtty->stamp(); | |
| 1166 xtty->end_elem(); | |
| 1167 } | |
| 1168 } | |
|
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1169 if (PrintCompilation && flags.state != unloaded) { |
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1170 print_on(tty, flags.state == zombie ? "made zombie " : "made not entrant "); |
| 0 | 1171 tty->cr(); |
| 1172 } | |
| 1173 } | |
| 1174 | |
| 1175 // Common functionality for both make_not_entrant and make_zombie | |
| 1141 | 1176 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
| 0 | 1177 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
| 1178 | |
|
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1179 bool was_alive = false; |
| 0 | 1180 |
| 1181 // Make sure the nmethod is not flushed in case of a safepoint in code below. | |
| 1182 nmethodLocker nml(this); | |
| 1183 | |
| 1184 { | |
|
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1185 // If the method is already zombie there is nothing to do |
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1186 if (is_zombie()) { |
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1187 return false; |
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1188 } |
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1189 |
|
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1190 // invalidate osr nmethod before acquiring the patching lock since |
|
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1191 // they both acquire leaf locks and we don't want a deadlock. |
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1192 // This logic is equivalent to the logic below for patching the |
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1193 // verified entry point of regular methods. |
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1194 if (is_osr_method()) { |
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1195 // this effectively makes the osr nmethod not entrant |
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1196 invalidate_osr_method(); |
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1197 } |
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1198 |
| 0 | 1199 // Enter critical section. Does not block for safepoint. |
| 1200 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
|
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1201 |
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1202 if (flags.state == state) { |
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1203 // another thread already performed this transition so nothing |
|
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1204 // to do, but return false to indicate this. |
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1205 return false; |
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1206 } |
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1207 |
| 0 | 1208 // The caller can be calling the method statically or through an inline |
| 1209 // cache call. | |
|
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1210 if (!is_osr_method() && !is_not_entrant()) { |
| 0 | 1211 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
| 1212 SharedRuntime::get_handle_wrong_method_stub()); | |
| 1213 assert (NativeJump::instruction_size == nmethod::_zombie_instruction_size, ""); | |
| 1214 } | |
| 1215 | |
| 1216 // When the nmethod becomes zombie it is no longer alive so the | |
| 1217 // dependencies must be flushed. nmethods in the not_entrant | |
| 1218 // state will be flushed later when the transition to zombie | |
| 1219 // happens or they get unloaded. | |
| 1220 if (state == zombie) { | |
| 1221 assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); | |
| 1222 flush_dependencies(NULL); | |
| 1223 } else { | |
| 1224 assert(state == not_entrant, "other cases may need to be handled differently"); | |
| 1225 } | |
| 1226 | |
|
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1227 was_alive = is_in_use(); // Read state under lock |
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1228 |
| 0 | 1229 // Change state |
| 1230 flags.state = state; | |
|
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1231 |
|
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1232 // Log the transition once |
|
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1233 log_state_change(); |
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1234 |
| 0 | 1235 } // leave critical region under Patching_lock |
| 1236 | |
| 1237 if (state == not_entrant) { | |
| 1238 Events::log("Make nmethod not entrant " INTPTR_FORMAT, this); | |
| 1239 } else { | |
| 1240 Events::log("Make nmethod zombie " INTPTR_FORMAT, this); | |
| 1241 } | |
| 1242 | |
| 1243 if (TraceCreateZombies) { | |
| 1244 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
| 1245 } | |
| 1246 | |
| 1247 // Make sweeper aware that there is a zombie method that needs to be removed | |
| 1248 NMethodSweeper::notify(this); | |
| 1249 | |
| 1250 // not_entrant only stuff | |
| 1251 if (state == not_entrant) { | |
| 1252 mark_as_seen_on_stack(); | |
| 1253 } | |
| 1254 | |
|
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1255 if (was_alive) { |
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1256 // It's a true state change, so mark the method as decompiled. |
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1257 // Do it only for transition from alive. |
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1258 inc_decompile_count(); |
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1259 } |
| 0 | 1260 |
| 1261 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
| 1262 // and it hasn't already been reported for this nmethod then report it now. | |
| 1263 // (the event may have been reported earilier if the GC marked it for unloading). | |
| 1264 if (state == zombie) { | |
| 1265 | |
| 1266 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
| 1267 | |
| 1268 if (JvmtiExport::should_post_compiled_method_unload() && | |
| 1269 !unload_reported()) { | |
| 1270 assert(method() != NULL, "checking"); | |
| 1271 { | |
| 1272 HandleMark hm; | |
| 1273 JvmtiExport::post_compiled_method_unload_at_safepoint( | |
| 1274 method()->jmethod_id(), code_begin()); | |
| 1275 } | |
| 1276 set_unload_reported(); | |
| 1277 } | |
| 1278 } | |
| 1279 | |
| 1280 | |
| 1281 // Zombie only stuff | |
| 1282 if (state == zombie) { | |
| 1283 VTune::delete_nmethod(this); | |
| 1284 } | |
| 1285 | |
| 1286 // Check whether method got unloaded at a safepoint before this, | |
| 1287 // if so we can skip the flushing steps below | |
|
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1288 if (method() == NULL) return true; |
| 0 | 1289 |
| 1290 // Remove nmethod from method. | |
| 1291 // We need to check if both the _code and _from_compiled_code_entry_point | |
| 1292 // refer to this nmethod because there is a race in setting these two fields | |
| 1293 // in methodOop as seen in bugid 4947125. | |
| 1294 // If the vep() points to the zombie nmethod, the memory for the nmethod | |
| 1295 // could be flushed and the compiler and vtable stubs could still call | |
| 1296 // through it. | |
| 1297 if (method()->code() == this || | |
| 1298 method()->from_compiled_entry() == verified_entry_point()) { | |
| 1299 HandleMark hm; | |
| 1300 method()->clear_code(); | |
| 1301 } | |
|
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1302 |
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1303 return true; |
| 0 | 1304 } |
| 1305 | |
| 1306 | |
| 1307 #ifndef PRODUCT | |
| 1308 void nmethod::check_safepoint() { | |
| 1309 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 1310 } | |
| 1311 #endif | |
| 1312 | |
| 1313 | |
| 1314 void nmethod::flush() { | |
| 1315 // Note that there are no valid oops in the nmethod anymore. | |
| 1316 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
| 1317 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
| 1318 | |
| 1319 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
| 1320 check_safepoint(); | |
| 1321 | |
| 1322 // completely deallocate this method | |
| 1323 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
| 1324 if (PrintMethodFlushing) { | |
| 1202 | 1325 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
| 1326 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
| 0 | 1327 } |
| 1328 | |
| 1329 // We need to deallocate any ExceptionCache data. | |
| 1330 // Note that we do not need to grab the nmethod lock for this, it | |
| 1331 // better be thread safe if we're disposing of it! | |
| 1332 ExceptionCache* ec = exception_cache(); | |
| 1333 set_exception_cache(NULL); | |
| 1334 while(ec != NULL) { | |
| 1335 ExceptionCache* next = ec->next(); | |
| 1336 delete ec; | |
| 1337 ec = next; | |
| 1338 } | |
| 1339 | |
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1340 if (on_scavenge_root_list()) { |
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1341 CodeCache::drop_scavenge_root_nmethod(this); |
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1342 } |
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1343 |
| 1202 | 1344 if (is_speculatively_disconnected()) { |
| 1345 CodeCache::remove_saved_code(this); | |
| 1346 } | |
| 1347 | |
| 0 | 1348 ((CodeBlob*)(this))->flush(); |
| 1349 | |
| 1350 CodeCache::free(this); | |
| 1351 } | |
| 1352 | |
| 1353 | |
| 1354 // | |
| 1355 // Notify all classes this nmethod is dependent on that it is no | |
| 1356 // longer dependent. This should only be called in two situations. | |
| 1357 // First, when a nmethod transitions to a zombie all dependents need | |
| 1358 // to be clear. Since zombification happens at a safepoint there's no | |
| 1359 // synchronization issues. The second place is a little more tricky. | |
| 1360 // During phase 1 of mark sweep class unloading may happen and as a | |
| 1361 // result some nmethods may get unloaded. In this case the flushing | |
| 1362 // of dependencies must happen during phase 1 since after GC any | |
| 1363 // dependencies in the unloaded nmethod won't be updated, so | |
| 1364 // traversing the dependency information in unsafe. In that case this | |
| 1365 // function is called with a non-NULL argument and this function only | |
| 1366 // notifies instanceKlasses that are reachable | |
| 1367 | |
| 1368 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
| 1369 assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); | |
| 1370 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), | |
| 1371 "is_alive is non-NULL if and only if we are called during GC"); | |
| 1372 if (!has_flushed_dependencies()) { | |
| 1373 set_has_flushed_dependencies(); | |
| 1374 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1375 klassOop klass = deps.context_type(); | |
| 1376 if (klass == NULL) continue; // ignore things like evol_method | |
| 1377 | |
| 1378 // During GC the is_alive closure is non-NULL, and is used to | |
| 1379 // determine liveness of dependees that need to be updated. | |
| 1380 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
| 1381 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
| 1382 } | |
| 1383 } | |
| 1384 } | |
| 1385 } | |
| 1386 | |
| 1387 | |
| 1388 // If this oop is not live, the nmethod can be unloaded. | |
| 1389 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
| 1390 OopClosure* keep_alive, | |
| 1391 oop* root, bool unloading_occurred) { | |
| 1392 assert(root != NULL, "just checking"); | |
| 1393 oop obj = *root; | |
| 1394 if (obj == NULL || is_alive->do_object_b(obj)) { | |
| 1395 return false; | |
| 1396 } | |
| 1397 if (obj->is_compiledICHolder()) { | |
| 1398 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
| 1399 if (is_alive->do_object_b( | |
| 1400 cichk_oop->holder_method()->method_holder()) && | |
| 1401 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1402 // The oop should be kept alive | |
| 1403 keep_alive->do_oop(root); | |
| 1404 return false; | |
| 1405 } | |
| 1406 } | |
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1407 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1408 // simply because one of its constant oops has gone dead. |
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1409 // No actual classes need to be unloaded in order for this to occur. |
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1410 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
| 0 | 1411 make_unloaded(is_alive, obj); |
| 1412 return true; | |
| 1413 } | |
| 1414 | |
| 1415 // ------------------------------------------------------------------ | |
| 1416 // post_compiled_method_load_event | |
| 1417 // new method for install_code() path | |
| 1418 // Transfer information from compilation to jvmti | |
| 1419 void nmethod::post_compiled_method_load_event() { | |
| 1420 | |
| 1421 methodOop moop = method(); | |
| 1422 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
| 1423 moop->klass_name()->bytes(), | |
| 1424 moop->klass_name()->utf8_length(), | |
| 1425 moop->name()->bytes(), | |
| 1426 moop->name()->utf8_length(), | |
| 1427 moop->signature()->bytes(), | |
| 1428 moop->signature()->utf8_length(), | |
| 1429 code_begin(), code_size()); | |
| 1430 | |
| 1431 if (JvmtiExport::should_post_compiled_method_load()) { | |
| 1432 JvmtiExport::post_compiled_method_load(this); | |
| 1433 } | |
| 1434 } | |
| 1435 | |
| 1436 void nmethod::post_compiled_method_unload() { | |
| 1437 assert(_method != NULL && !is_unloaded(), "just checking"); | |
| 1438 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
| 1439 | |
| 1440 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
| 1441 // post the event. Sometime later this nmethod will be made a zombie by | |
| 1442 // the sweeper but the methodOop will not be valid at that point. | |
| 1443 if (JvmtiExport::should_post_compiled_method_unload()) { | |
| 1444 assert(!unload_reported(), "already unloaded"); | |
| 1445 HandleMark hm; | |
| 1446 JvmtiExport::post_compiled_method_unload_at_safepoint( | |
| 1447 method()->jmethod_id(), code_begin()); | |
| 1448 } | |
| 1449 | |
| 1450 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
| 1451 // any time. As the nmethod is being unloaded now we mark it has | |
| 1452 // having the unload event reported - this will ensure that we don't | |
| 1453 // attempt to report the event in the unlikely scenario where the | |
| 1454 // event is enabled at the time the nmethod is made a zombie. | |
| 1455 set_unload_reported(); | |
| 1456 } | |
| 1457 | |
| 1458 // This is called at the end of the strong tracing/marking phase of a | |
| 1459 // GC to unload an nmethod if it contains otherwise unreachable | |
| 1460 // oops. | |
| 1461 | |
| 1462 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
| 1463 OopClosure* keep_alive, bool unloading_occurred) { | |
| 1464 // Make sure the oop's ready to receive visitors | |
| 1465 assert(!is_zombie() && !is_unloaded(), | |
| 1466 "should not call follow on zombie or unloaded nmethod"); | |
| 1467 | |
| 1468 // If the method is not entrant then a JMP is plastered over the | |
| 1469 // first few bytes. If an oop in the old code was there, that oop | |
| 1470 // should not get GC'd. Skip the first few bytes of oops on | |
| 1471 // not-entrant methods. | |
| 1472 address low_boundary = verified_entry_point(); | |
| 1473 if (is_not_entrant()) { | |
| 1474 low_boundary += NativeJump::instruction_size; | |
| 1475 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1476 // (See comment above.) | |
| 1477 } | |
| 1478 | |
| 1479 // The RedefineClasses() API can cause the class unloading invariant | |
| 1480 // to no longer be true. See jvmtiExport.hpp for details. | |
| 1481 // Also, leave a debugging breadcrumb in local flag. | |
| 1482 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
| 1483 if (a_class_was_redefined) { | |
| 1484 // This set of the unloading_occurred flag is done before the | |
| 1485 // call to post_compiled_method_unload() so that the unloading | |
| 1486 // of this nmethod is reported. | |
| 1487 unloading_occurred = true; | |
| 1488 } | |
| 1489 | |
| 1490 // Follow methodOop | |
| 1491 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
| 1492 return; | |
| 1493 } | |
| 1494 | |
| 1495 // Exception cache | |
| 1496 ExceptionCache* ec = exception_cache(); | |
| 1497 while (ec != NULL) { | |
| 1498 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
| 1499 oop ex = *ex_addr; | |
| 1500 ExceptionCache* next_ec = ec->next(); | |
| 1501 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
| 1502 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
| 1503 remove_from_exception_cache(ec); | |
| 1504 } | |
| 1505 ec = next_ec; | |
| 1506 } | |
| 1507 | |
| 1508 // If class unloading occurred we first iterate over all inline caches and | |
| 1509 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
| 1510 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
| 1511 // iteration below. | |
| 1512 if (unloading_occurred) { | |
| 1513 RelocIterator iter(this, low_boundary); | |
| 1514 while(iter.next()) { | |
| 1515 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1516 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1517 oop ic_oop = ic->cached_oop(); | |
| 1518 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
| 1519 // The only exception is compiledICHolder oops which may | |
| 1520 // yet be marked below. (We check this further below). | |
| 1521 if (ic_oop->is_compiledICHolder()) { | |
| 1522 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
| 1523 if (is_alive->do_object_b( | |
| 1524 cichk_oop->holder_method()->method_holder()) && | |
| 1525 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1526 continue; | |
| 1527 } | |
| 1528 } | |
| 1529 ic->set_to_clean(); | |
| 1530 assert(ic->cached_oop() == NULL, "cached oop in IC should be cleared") | |
| 1531 } | |
| 1532 } | |
| 1533 } | |
| 1534 } | |
| 1535 | |
| 1536 // Compiled code | |
| 1537 RelocIterator iter(this, low_boundary); | |
| 1538 while (iter.next()) { | |
| 1539 if (iter.type() == relocInfo::oop_type) { | |
| 1540 oop_Relocation* r = iter.oop_reloc(); | |
| 1541 // In this loop, we must only traverse those oops directly embedded in | |
| 1542 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 1543 assert(1 == (r->oop_is_immediate()) + | |
| 1544 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1545 "oop must be found in exactly one place"); | |
| 1546 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
| 1547 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
| 1548 return; | |
| 1549 } | |
| 1550 } | |
| 1551 } | |
| 1552 } | |
| 1553 | |
| 1554 | |
| 1555 // Scopes | |
| 1556 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
| 1557 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1558 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
| 1559 return; | |
| 1560 } | |
| 1561 } | |
| 1562 | |
| 1563 #ifndef PRODUCT | |
| 1564 // This nmethod was not unloaded; check below that all CompiledICs | |
| 1565 // refer to marked oops. | |
| 1566 { | |
| 1567 RelocIterator iter(this, low_boundary); | |
| 1568 while (iter.next()) { | |
| 1569 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1570 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1571 oop ic_oop = ic->cached_oop(); | |
| 1572 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
| 1573 "Found unmarked ic_oop in reachable nmethod"); | |
| 1574 } | |
| 1575 } | |
| 1576 } | |
| 1577 #endif // !PRODUCT | |
| 1578 } | |
| 1579 | |
| 941 | 1580 // This method is called twice during GC -- once while |
| 1581 // tracing the "active" nmethods on thread stacks during | |
| 1582 // the (strong) marking phase, and then again when walking | |
| 1583 // the code cache contents during the weak roots processing | |
| 1584 // phase. The two uses are distinguished by means of the | |
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1585 // 'do_strong_roots_only' flag, which is true in the first |
| 941 | 1586 // case. We want to walk the weak roots in the nmethod |
| 1587 // only in the second case. The weak roots in the nmethod | |
| 1588 // are the oops in the ExceptionCache and the InlineCache | |
| 1589 // oops. | |
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1590 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
| 0 | 1591 // make sure the oops ready to receive visitors |
| 1592 assert(!is_zombie() && !is_unloaded(), | |
| 1593 "should not call follow on zombie or unloaded nmethod"); | |
| 1594 | |
| 1595 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1596 // first few bytes. If an oop in the old code was there, that oop | |
| 1597 // should not get GC'd. Skip the first few bytes of oops on | |
| 1598 // not-entrant methods. | |
| 1599 address low_boundary = verified_entry_point(); | |
| 1600 if (is_not_entrant()) { | |
| 1601 low_boundary += NativeJump::instruction_size; | |
| 1602 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1603 // (See comment above.) | |
| 1604 } | |
| 1605 | |
| 1606 // Compiled code | |
| 1607 f->do_oop((oop*) &_method); | |
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1608 if (!do_strong_roots_only) { |
| 941 | 1609 // weak roots processing phase -- update ExceptionCache oops |
| 1610 ExceptionCache* ec = exception_cache(); | |
| 1611 while(ec != NULL) { | |
| 1612 f->do_oop((oop*)ec->exception_type_addr()); | |
| 1613 ec = ec->next(); | |
| 1614 } | |
| 1615 } // Else strong roots phase -- skip oops in ExceptionCache | |
| 0 | 1616 |
| 1617 RelocIterator iter(this, low_boundary); | |
| 941 | 1618 |
| 0 | 1619 while (iter.next()) { |
| 1620 if (iter.type() == relocInfo::oop_type ) { | |
| 1621 oop_Relocation* r = iter.oop_reloc(); | |
| 1622 // In this loop, we must only follow those oops directly embedded in | |
| 1623 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 941 | 1624 assert(1 == (r->oop_is_immediate()) + |
| 1625 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1626 "oop must be found in exactly one place"); | |
| 0 | 1627 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
| 1628 f->do_oop(r->oop_addr()); | |
| 1629 } | |
| 1630 } | |
| 1631 } | |
| 1632 | |
| 1633 // Scopes | |
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1634 // This includes oop constants not inlined in the code stream. |
| 0 | 1635 for (oop* p = oops_begin(); p < oops_end(); p++) { |
| 1636 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1637 f->do_oop(p); | |
| 1638 } | |
| 1639 } | |
| 1640 | |
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1641 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1642 |
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1643 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1644 |
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1645 // An nmethod is "marked" if its _mark_link is set non-null. |
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1646 // Even if it is the end of the linked list, it will have a non-null link value, |
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1647 // as long as it is on the list. |
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1648 // This code must be MP safe, because it is used from parallel GC passes. |
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1649 bool nmethod::test_set_oops_do_mark() { |
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1650 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1651 nmethod* observed_mark_link = _oops_do_mark_link; |
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1652 if (observed_mark_link == NULL) { |
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1653 // Claim this nmethod for this thread to mark. |
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1654 observed_mark_link = (nmethod*) |
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1655 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1656 if (observed_mark_link == NULL) { |
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1657 |
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1658 // Atomically append this nmethod (now claimed) to the head of the list: |
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1659 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1660 for (;;) { |
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1661 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1662 _oops_do_mark_link = required_mark_nmethods; |
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1663 observed_mark_nmethods = (nmethod*) |
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1664 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1665 if (observed_mark_nmethods == required_mark_nmethods) |
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1666 break; |
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1667 } |
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1668 // Mark was clear when we first saw this guy. |
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1669 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1670 return false; |
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1671 } |
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1672 } |
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1673 // On fall through, another racing thread marked this nmethod before we did. |
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1674 return true; |
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1675 } |
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1676 |
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1677 void nmethod::oops_do_marking_prologue() { |
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1678 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1679 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1680 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1681 // may fork a bunch of threads, and we need them all to see the same state. |
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1682 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1683 guarantee(observed == NULL, "no races in this sequential code"); |
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1684 } |
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1685 |
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1686 void nmethod::oops_do_marking_epilogue() { |
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1687 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1688 nmethod* cur = _oops_do_mark_nmethods; |
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1689 while (cur != NMETHOD_SENTINEL) { |
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1690 assert(cur != NULL, "not NULL-terminated"); |
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1691 nmethod* next = cur->_oops_do_mark_link; |
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1692 cur->_oops_do_mark_link = NULL; |
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1693 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1694 cur = next; |
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1695 } |
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1696 void* required = _oops_do_mark_nmethods; |
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1697 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1698 guarantee(observed == required, "no races in this sequential code"); |
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1699 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1700 } |
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1701 |
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1702 class DetectScavengeRoot: public OopClosure { |
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1703 bool _detected_scavenge_root; |
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1704 public: |
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1705 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1706 { NOT_PRODUCT(_print_nm = NULL); } |
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1707 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1708 virtual void do_oop(oop* p) { |
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1709 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1710 NOT_PRODUCT(maybe_print(p)); |
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1711 _detected_scavenge_root = true; |
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1712 } |
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1713 } |
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1714 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1715 |
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1716 #ifndef PRODUCT |
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1717 nmethod* _print_nm; |
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1718 void maybe_print(oop* p) { |
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1719 if (_print_nm == NULL) return; |
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1720 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1721 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1722 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1723 (intptr_t)(*p), (intptr_t)p); |
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1724 (*p)->print(); |
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1725 } |
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1726 #endif //PRODUCT |
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1727 }; |
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1728 |
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1729 bool nmethod::detect_scavenge_root_oops() { |
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1730 DetectScavengeRoot detect_scavenge_root; |
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1731 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1732 oops_do(&detect_scavenge_root); |
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1733 return detect_scavenge_root.detected_scavenge_root(); |
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1734 } |
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1735 |
| 0 | 1736 // Method that knows how to preserve outgoing arguments at call. This method must be |
| 1737 // called with a frame corresponding to a Java invoke | |
| 1738 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
| 1739 if (!method()->is_native()) { | |
| 1740 SimpleScopeDesc ssd(this, fr.pc()); | |
| 1741 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); | |
|
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1742 bool has_receiver = call->has_receiver(); |
| 0 | 1743 symbolOop signature = call->signature(); |
|
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1744 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
| 0 | 1745 } |
| 1746 } | |
| 1747 | |
| 1748 | |
| 1749 oop nmethod::embeddedOop_at(u_char* p) { | |
| 1750 RelocIterator iter(this, p, p + oopSize); | |
| 1751 while (iter.next()) | |
| 1752 if (iter.type() == relocInfo::oop_type) { | |
| 1753 return iter.oop_reloc()->oop_value(); | |
| 1754 } | |
| 1755 return NULL; | |
| 1756 } | |
| 1757 | |
| 1758 | |
| 1759 inline bool includes(void* p, void* from, void* to) { | |
| 1760 return from <= p && p < to; | |
| 1761 } | |
| 1762 | |
| 1763 | |
| 1764 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
| 1765 assert(count >= 2, "must be sentinel values, at least"); | |
| 1766 | |
| 1767 #ifdef ASSERT | |
| 1768 // must be sorted and unique; we do a binary search in find_pc_desc() | |
| 1769 int prev_offset = pcs[0].pc_offset(); | |
| 1770 assert(prev_offset == PcDesc::lower_offset_limit, | |
| 1771 "must start with a sentinel"); | |
| 1772 for (int i = 1; i < count; i++) { | |
| 1773 int this_offset = pcs[i].pc_offset(); | |
| 1774 assert(this_offset > prev_offset, "offsets must be sorted"); | |
| 1775 prev_offset = this_offset; | |
| 1776 } | |
| 1777 assert(prev_offset == PcDesc::upper_offset_limit, | |
| 1778 "must end with a sentinel"); | |
| 1779 #endif //ASSERT | |
| 1780 | |
|
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1781 // Search for MethodHandle invokes and tag the nmethod. |
|
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1782 for (int i = 0; i < count; i++) { |
|
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1783 if (pcs[i].is_method_handle_invoke()) { |
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1784 set_has_method_handle_invokes(true); |
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1785 break; |
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1786 } |
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1787 } |
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1788 |
| 0 | 1789 int size = count * sizeof(PcDesc); |
| 1790 assert(scopes_pcs_size() >= size, "oob"); | |
| 1791 memcpy(scopes_pcs_begin(), pcs, size); | |
| 1792 | |
| 1793 // Adjust the final sentinel downward. | |
| 1794 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
| 1795 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
| 1796 last_pc->set_pc_offset(instructions_size() + 1); | |
| 1797 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { | |
| 1798 // Fill any rounding gaps with copies of the last record. | |
| 1799 last_pc[1] = last_pc[0]; | |
| 1800 } | |
| 1801 // The following assert could fail if sizeof(PcDesc) is not | |
| 1802 // an integral multiple of oopSize (the rounding term). | |
| 1803 // If it fails, change the logic to always allocate a multiple | |
| 1804 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
| 1805 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
| 1806 } | |
| 1807 | |
| 1808 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
| 1809 assert(scopes_data_size() >= size, "oob"); | |
| 1810 memcpy(scopes_data_begin(), buffer, size); | |
| 1811 } | |
| 1812 | |
| 1813 | |
| 1814 #ifdef ASSERT | |
| 1815 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
| 1816 PcDesc* lower = nm->scopes_pcs_begin(); | |
| 1817 PcDesc* upper = nm->scopes_pcs_end(); | |
| 1818 lower += 1; // exclude initial sentinel | |
| 1819 PcDesc* res = NULL; | |
| 1820 for (PcDesc* p = lower; p < upper; p++) { | |
| 1821 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
| 1822 if (match_desc(p, pc_offset, approximate)) { | |
| 1823 if (res == NULL) | |
| 1824 res = p; | |
| 1825 else | |
| 1826 res = (PcDesc*) badAddress; | |
| 1827 } | |
| 1828 } | |
| 1829 return res; | |
| 1830 } | |
| 1831 #endif | |
| 1832 | |
| 1833 | |
| 1834 // Finds a PcDesc with real-pc equal to "pc" | |
| 1835 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
| 1836 address base_address = instructions_begin(); | |
| 1837 if ((pc < base_address) || | |
| 1838 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
| 1839 return NULL; // PC is wildly out of range | |
| 1840 } | |
| 1841 int pc_offset = (int) (pc - base_address); | |
| 1842 | |
| 1843 // Check the PcDesc cache if it contains the desired PcDesc | |
| 1844 // (This as an almost 100% hit rate.) | |
| 1845 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
| 1846 if (res != NULL) { | |
| 1847 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
| 1848 return res; | |
| 1849 } | |
| 1850 | |
| 1851 // Fallback algorithm: quasi-linear search for the PcDesc | |
| 1852 // Find the last pc_offset less than the given offset. | |
| 1853 // The successor must be the required match, if there is a match at all. | |
| 1854 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
| 1855 PcDesc* lower = scopes_pcs_begin(); | |
| 1856 PcDesc* upper = scopes_pcs_end(); | |
| 1857 upper -= 1; // exclude final sentinel | |
| 1858 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
| 1859 | |
| 1860 #define assert_LU_OK \ | |
| 1861 /* invariant on lower..upper during the following search: */ \ | |
| 1862 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
| 1863 assert(upper->pc_offset() >= pc_offset, "sanity") | |
| 1864 assert_LU_OK; | |
| 1865 | |
| 1866 // Use the last successful return as a split point. | |
| 1867 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
| 1868 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1869 if (mid->pc_offset() < pc_offset) { | |
| 1870 lower = mid; | |
| 1871 } else { | |
| 1872 upper = mid; | |
| 1873 } | |
| 1874 | |
| 1875 // Take giant steps at first (4096, then 256, then 16, then 1) | |
| 1876 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
| 1877 const int RADIX = (1 << LOG2_RADIX); | |
| 1878 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
| 1879 while ((mid = lower + step) < upper) { | |
| 1880 assert_LU_OK; | |
| 1881 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1882 if (mid->pc_offset() < pc_offset) { | |
| 1883 lower = mid; | |
| 1884 } else { | |
| 1885 upper = mid; | |
| 1886 break; | |
| 1887 } | |
| 1888 } | |
| 1889 assert_LU_OK; | |
| 1890 } | |
| 1891 | |
| 1892 // Sneak up on the value with a linear search of length ~16. | |
| 1893 while (true) { | |
| 1894 assert_LU_OK; | |
| 1895 mid = lower + 1; | |
| 1896 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1897 if (mid->pc_offset() < pc_offset) { | |
| 1898 lower = mid; | |
| 1899 } else { | |
| 1900 upper = mid; | |
| 1901 break; | |
| 1902 } | |
| 1903 } | |
| 1904 #undef assert_LU_OK | |
| 1905 | |
| 1906 if (match_desc(upper, pc_offset, approximate)) { | |
| 1907 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
| 1908 _pc_desc_cache.add_pc_desc(upper); | |
| 1909 return upper; | |
| 1910 } else { | |
| 1911 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
| 1912 return NULL; | |
| 1913 } | |
| 1914 } | |
| 1915 | |
| 1916 | |
| 1917 bool nmethod::check_all_dependencies() { | |
| 1918 bool found_check = false; | |
| 1919 // wholesale check of all dependencies | |
| 1920 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1921 if (deps.check_dependency() != NULL) { | |
| 1922 found_check = true; | |
| 1923 NOT_DEBUG(break); | |
| 1924 } | |
| 1925 } | |
| 1926 return found_check; // tell caller if we found anything | |
| 1927 } | |
| 1928 | |
| 1929 bool nmethod::check_dependency_on(DepChange& changes) { | |
| 1930 // What has happened: | |
| 1931 // 1) a new class dependee has been added | |
| 1932 // 2) dependee and all its super classes have been marked | |
| 1933 bool found_check = false; // set true if we are upset | |
| 1934 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1935 // Evaluate only relevant dependencies. | |
| 1936 if (deps.spot_check_dependency_at(changes) != NULL) { | |
| 1937 found_check = true; | |
| 1938 NOT_DEBUG(break); | |
| 1939 } | |
| 1940 } | |
| 1941 return found_check; | |
| 1942 } | |
| 1943 | |
| 1944 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
| 1945 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
| 1946 objArrayOop dependee_methods = dependee_ik->methods(); | |
| 1947 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1948 if (deps.type() == Dependencies::evol_method) { | |
| 1949 methodOop method = deps.method_argument(0); | |
| 1950 for (int j = 0; j < dependee_methods->length(); j++) { | |
| 1951 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
| 1952 // RC_TRACE macro has an embedded ResourceMark | |
| 1953 RC_TRACE(0x01000000, | |
| 1954 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
| 1955 _method->method_holder()->klass_part()->external_name(), | |
| 1956 _method->name()->as_C_string(), | |
| 1957 _method->signature()->as_C_string(), compile_id(), | |
| 1958 method->method_holder()->klass_part()->external_name(), | |
| 1959 method->name()->as_C_string(), | |
| 1960 method->signature()->as_C_string())); | |
| 1961 if (TraceDependencies || LogCompilation) | |
| 1962 deps.log_dependency(dependee); | |
| 1963 return true; | |
| 1964 } | |
| 1965 } | |
| 1966 } | |
| 1967 } | |
| 1968 return false; | |
| 1969 } | |
| 1970 | |
| 1971 // Called from mark_for_deoptimization, when dependee is invalidated. | |
| 1972 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
| 1973 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1974 if (deps.type() != Dependencies::evol_method) | |
| 1975 continue; | |
| 1976 methodOop method = deps.method_argument(0); | |
| 1977 if (method == dependee) return true; | |
| 1978 } | |
| 1979 return false; | |
| 1980 } | |
| 1981 | |
| 1982 | |
| 1983 bool nmethod::is_patchable_at(address instr_addr) { | |
| 1984 assert (code_contains(instr_addr), "wrong nmethod used"); | |
| 1985 if (is_zombie()) { | |
| 1986 // a zombie may never be patched | |
| 1987 return false; | |
| 1988 } | |
| 1989 return true; | |
| 1990 } | |
| 1991 | |
| 1992 | |
| 1993 address nmethod::continuation_for_implicit_exception(address pc) { | |
| 1994 // Exception happened outside inline-cache check code => we are inside | |
| 1995 // an active nmethod => use cpc to determine a return address | |
| 1996 int exception_offset = pc - instructions_begin(); | |
| 1997 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); | |
| 1998 #ifdef ASSERT | |
| 1999 if (cont_offset == 0) { | |
| 2000 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
| 2001 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
| 2002 HandleMark hm(thread); | |
| 2003 ResourceMark rm(thread); | |
| 2004 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2005 assert(cb != NULL && cb == this, ""); | |
| 2006 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
| 2007 print(); | |
| 2008 method()->print_codes(); | |
| 2009 print_code(); | |
| 2010 print_pcs(); | |
| 2011 } | |
| 2012 #endif | |
| 1250 | 2013 if (cont_offset == 0) { |
| 2014 // Let the normal error handling report the exception | |
| 2015 return NULL; | |
| 2016 } | |
| 0 | 2017 return instructions_begin() + cont_offset; |
| 2018 } | |
| 2019 | |
| 2020 | |
| 2021 | |
| 2022 void nmethod_init() { | |
| 2023 // make sure you didn't forget to adjust the filler fields | |
| 2024 assert(sizeof(nmFlags) <= 4, "nmFlags occupies more than a word"); | |
| 2025 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
| 2026 } | |
| 2027 | |
| 2028 | |
| 2029 //------------------------------------------------------------------------------------------- | |
| 2030 | |
| 2031 | |
| 2032 // QQQ might we make this work from a frame?? | |
| 2033 nmethodLocker::nmethodLocker(address pc) { | |
| 2034 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2035 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
| 2036 _nm = (nmethod*)cb; | |
| 2037 lock_nmethod(_nm); | |
| 2038 } | |
| 2039 | |
| 2040 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
| 2041 if (nm == NULL) return; | |
| 2042 Atomic::inc(&nm->_lock_count); | |
| 2043 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
| 2044 } | |
| 2045 | |
| 2046 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
| 2047 if (nm == NULL) return; | |
| 2048 Atomic::dec(&nm->_lock_count); | |
| 2049 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
| 2050 } | |
| 2051 | |
| 1204 | 2052 |
| 2053 // ----------------------------------------------------------------------------- | |
| 2054 // nmethod::get_deopt_original_pc | |
| 2055 // | |
| 2056 // Return the original PC for the given PC if: | |
| 2057 // (a) the given PC belongs to a nmethod and | |
| 2058 // (b) it is a deopt PC | |
| 2059 address nmethod::get_deopt_original_pc(const frame* fr) { | |
| 2060 if (fr->cb() == NULL) return NULL; | |
| 2061 | |
| 2062 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
| 2063 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
| 2064 return nm->get_original_pc(fr); | |
| 2065 | |
| 2066 return NULL; | |
| 0 | 2067 } |
| 2068 | |
| 2069 | |
| 2070 // ----------------------------------------------------------------------------- | |
|
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2071 // MethodHandle |
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2072 |
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2073 bool nmethod::is_method_handle_return(address return_pc) { |
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2074 if (!has_method_handle_invokes()) return false; |
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2075 PcDesc* pd = pc_desc_at(return_pc); |
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2076 if (pd == NULL) |
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2077 return false; |
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2078 return pd->is_method_handle_invoke(); |
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2079 } |
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2080 |
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2081 |
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2082 // ----------------------------------------------------------------------------- |
| 0 | 2083 // Verification |
| 2084 | |
|
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2085 class VerifyOopsClosure: public OopClosure { |
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2086 nmethod* _nm; |
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2087 bool _ok; |
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2088 public: |
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2089 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2090 bool ok() { return _ok; } |
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2091 virtual void do_oop(oop* p) { |
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2092 if ((*p) == NULL || (*p)->is_oop()) return; |
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2093 if (_ok) { |
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2094 _nm->print_nmethod(true); |
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2095 _ok = false; |
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2096 } |
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2097 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2098 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2099 } |
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2100 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2101 }; |
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2102 |
| 0 | 2103 void nmethod::verify() { |
| 2104 | |
| 2105 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
| 2106 // seems odd. | |
| 2107 | |
| 2108 if( is_zombie() || is_not_entrant() ) | |
| 2109 return; | |
| 2110 | |
| 2111 // Make sure all the entry points are correctly aligned for patching. | |
| 2112 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
| 2113 | |
| 2114 assert(method()->is_oop(), "must be valid"); | |
| 2115 | |
| 2116 ResourceMark rm; | |
| 2117 | |
| 2118 if (!CodeCache::contains(this)) { | |
| 2119 fatal1("nmethod at " INTPTR_FORMAT " not in zone", this); | |
| 2120 } | |
| 2121 | |
| 2122 if(is_native_method() ) | |
| 2123 return; | |
| 2124 | |
| 2125 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
| 2126 if (nm != this) { | |
| 2127 fatal1("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", this); | |
| 2128 } | |
| 2129 | |
| 2130 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2131 if (! p->verify(this)) { | |
| 2132 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
| 2133 } | |
| 2134 } | |
| 2135 | |
|
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2136 VerifyOopsClosure voc(this); |
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2137 oops_do(&voc); |
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2138 assert(voc.ok(), "embedded oops must be OK"); |
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2139 verify_scavenge_root_oops(); |
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2140 |
| 0 | 2141 verify_scopes(); |
| 2142 } | |
| 2143 | |
| 2144 | |
| 2145 void nmethod::verify_interrupt_point(address call_site) { | |
| 2146 // This code does not work in release mode since | |
| 2147 // owns_lock only is available in debug mode. | |
| 2148 CompiledIC* ic = NULL; | |
| 2149 Thread *cur = Thread::current(); | |
| 2150 if (CompiledIC_lock->owner() == cur || | |
| 2151 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
| 2152 SafepointSynchronize::is_at_safepoint())) { | |
| 2153 ic = CompiledIC_at(call_site); | |
| 2154 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 2155 } else { | |
| 2156 MutexLocker ml_verify (CompiledIC_lock); | |
| 2157 ic = CompiledIC_at(call_site); | |
| 2158 } | |
| 2159 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
| 2160 assert(pd != NULL, "PcDesc must exist"); | |
| 2161 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
|
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2162 pd->obj_decode_offset(), pd->should_reexecute()); |
| 0 | 2163 !sd->is_top(); sd = sd->sender()) { |
| 2164 sd->verify(); | |
| 2165 } | |
| 2166 } | |
| 2167 | |
| 2168 void nmethod::verify_scopes() { | |
| 2169 if( !method() ) return; // Runtime stubs have no scope | |
| 2170 if (method()->is_native()) return; // Ignore stub methods. | |
| 2171 // iterate through all interrupt point | |
| 2172 // and verify the debug information is valid. | |
| 2173 RelocIterator iter((nmethod*)this); | |
| 2174 while (iter.next()) { | |
| 2175 address stub = NULL; | |
| 2176 switch (iter.type()) { | |
| 2177 case relocInfo::virtual_call_type: | |
| 2178 verify_interrupt_point(iter.addr()); | |
| 2179 break; | |
| 2180 case relocInfo::opt_virtual_call_type: | |
| 2181 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
| 2182 verify_interrupt_point(iter.addr()); | |
| 2183 break; | |
| 2184 case relocInfo::static_call_type: | |
| 2185 stub = iter.static_call_reloc()->static_stub(); | |
| 2186 //verify_interrupt_point(iter.addr()); | |
| 2187 break; | |
| 2188 case relocInfo::runtime_call_type: | |
| 2189 address destination = iter.reloc()->value(); | |
| 2190 // Right now there is no way to find out which entries support | |
| 2191 // an interrupt point. It would be nice if we had this | |
| 2192 // information in a table. | |
| 2193 break; | |
| 2194 } | |
| 2195 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
| 2196 } | |
| 2197 } | |
| 2198 | |
| 2199 | |
| 2200 // ----------------------------------------------------------------------------- | |
| 2201 // Non-product code | |
| 2202 #ifndef PRODUCT | |
| 2203 | |
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2204 class DebugScavengeRoot: public OopClosure { |
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2205 nmethod* _nm; |
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2206 bool _ok; |
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2207 public: |
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2208 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2209 bool ok() { return _ok; } |
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2210 virtual void do_oop(oop* p) { |
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2211 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2212 if (_ok) { |
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2213 _nm->print_nmethod(true); |
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2214 _ok = false; |
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2215 } |
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2216 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2217 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2218 (*p)->print(); |
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2219 } |
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2220 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2221 }; |
| 0 | 2222 |
|
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2223 void nmethod::verify_scavenge_root_oops() { |
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2224 if (!on_scavenge_root_list()) { |
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2225 // Actually look inside, to verify the claim that it's clean. |
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2226 DebugScavengeRoot debug_scavenge_root(this); |
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2227 oops_do(&debug_scavenge_root); |
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2228 if (!debug_scavenge_root.ok()) |
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2229 fatal("found an unadvertised bad non-perm oop in the code cache"); |
| 0 | 2230 } |
|
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2231 assert(scavenge_root_not_marked(), ""); |
| 0 | 2232 } |
| 2233 | |
|
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2234 #endif // PRODUCT |
| 0 | 2235 |
| 2236 // Printing operations | |
| 2237 | |
| 2238 void nmethod::print() const { | |
| 2239 ResourceMark rm; | |
| 2240 ttyLocker ttyl; // keep the following output all in one block | |
| 2241 | |
| 2242 tty->print("Compiled "); | |
| 2243 | |
| 2244 if (is_compiled_by_c1()) { | |
| 2245 tty->print("(c1) "); | |
| 2246 } else if (is_compiled_by_c2()) { | |
| 2247 tty->print("(c2) "); | |
| 2248 } else { | |
| 2249 tty->print("(nm) "); | |
| 2250 } | |
| 2251 | |
| 2252 print_on(tty, "nmethod"); | |
| 2253 tty->cr(); | |
| 2254 if (WizardMode) { | |
| 2255 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
| 2256 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
| 2257 tty->print(" { "); | |
| 2258 if (version()) tty->print("v%d ", version()); | |
| 2259 if (level()) tty->print("l%d ", level()); | |
| 2260 if (is_in_use()) tty->print("in_use "); | |
| 2261 if (is_not_entrant()) tty->print("not_entrant "); | |
| 2262 if (is_zombie()) tty->print("zombie "); | |
| 2263 if (is_unloaded()) tty->print("unloaded "); | |
|
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|
2264 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
| 0 | 2265 tty->print_cr("}:"); |
| 2266 } | |
| 2267 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2268 (address)this, | |
| 2269 (address)this + size(), | |
| 2270 size()); | |
| 2271 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2272 relocation_begin(), | |
| 2273 relocation_end(), | |
| 2274 relocation_size()); | |
| 2275 if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2276 code_begin(), | |
| 2277 code_end(), | |
| 2278 code_size()); | |
| 2279 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2280 stub_begin(), | |
| 2281 stub_end(), | |
| 2282 stub_size()); | |
| 2283 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2284 consts_begin(), | |
| 2285 consts_end(), | |
| 2286 consts_size()); | |
| 2287 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2288 scopes_data_begin(), | |
| 2289 scopes_data_end(), | |
| 2290 scopes_data_size()); | |
| 2291 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2292 scopes_pcs_begin(), | |
| 2293 scopes_pcs_end(), | |
| 2294 scopes_pcs_size()); | |
| 2295 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2296 dependencies_begin(), | |
| 2297 dependencies_end(), | |
| 2298 dependencies_size()); | |
| 2299 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2300 handler_table_begin(), | |
| 2301 handler_table_end(), | |
| 2302 handler_table_size()); | |
| 2303 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2304 nul_chk_table_begin(), | |
| 2305 nul_chk_table_end(), | |
| 2306 nul_chk_table_size()); | |
| 2307 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2308 oops_begin(), | |
| 2309 oops_end(), | |
| 2310 oops_size()); | |
| 2311 } | |
| 2312 | |
|
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|
2313 void nmethod::print_code() { |
|
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diff
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|
2314 HandleMark hm; |
|
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diff
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|
2315 ResourceMark m; |
|
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|
2316 Disassembler::decode(this); |
|
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|
2317 } |
|
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|
2318 |
|
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|
2319 |
|
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|
2320 #ifndef PRODUCT |
| 0 | 2321 |
| 2322 void nmethod::print_scopes() { | |
| 2323 // Find the first pc desc for all scopes in the code and print it. | |
| 2324 ResourceMark rm; | |
| 2325 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2326 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
| 2327 continue; | |
| 2328 | |
| 2329 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
| 2330 sd->print_on(tty, p); | |
| 2331 } | |
| 2332 } | |
| 2333 | |
| 2334 void nmethod::print_dependencies() { | |
| 2335 ResourceMark rm; | |
| 2336 ttyLocker ttyl; // keep the following output all in one block | |
| 2337 tty->print_cr("Dependencies:"); | |
| 2338 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2339 deps.print_dependency(); | |
| 2340 klassOop ctxk = deps.context_type(); | |
| 2341 if (ctxk != NULL) { | |
| 2342 Klass* k = Klass::cast(ctxk); | |
| 2343 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
| 30 | 2344 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
| 0 | 2345 } |
| 2346 } | |
| 2347 deps.log_dependency(); // put it into the xml log also | |
| 2348 } | |
| 2349 } | |
| 2350 | |
| 2351 | |
| 2352 void nmethod::print_relocations() { | |
| 2353 ResourceMark m; // in case methods get printed via the debugger | |
| 2354 tty->print_cr("relocations:"); | |
| 2355 RelocIterator iter(this); | |
| 2356 iter.print(); | |
| 2357 if (UseRelocIndex) { | |
| 2358 jint* index_end = (jint*)relocation_end() - 1; | |
| 2359 jint index_size = *index_end; | |
| 2360 jint* index_start = (jint*)( (address)index_end - index_size ); | |
| 2361 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
| 2362 if (index_size > 0) { | |
| 2363 jint* ip; | |
| 2364 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
| 2365 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
| 2366 ip[0], | |
| 2367 ip[1], | |
| 2368 header_end()+ip[0], | |
| 2369 relocation_begin()-1+ip[1]); | |
| 2370 for (; ip < index_end; ip++) | |
| 2371 tty->print_cr(" (%d ?)", ip[0]); | |
| 2372 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
| 2373 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
| 2374 } | |
| 2375 } | |
| 2376 } | |
| 2377 | |
| 2378 | |
| 2379 void nmethod::print_pcs() { | |
| 2380 ResourceMark m; // in case methods get printed via debugger | |
| 2381 tty->print_cr("pc-bytecode offsets:"); | |
| 2382 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2383 p->print(this); | |
| 2384 } | |
| 2385 } | |
| 2386 | |
|
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|
2387 #endif // PRODUCT |
| 0 | 2388 |
| 2389 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
| 2390 RelocIterator iter(this, begin, end); | |
| 2391 bool have_one = false; | |
| 2392 while (iter.next()) { | |
| 2393 have_one = true; | |
| 2394 switch (iter.type()) { | |
| 2395 case relocInfo::none: return "no_reloc"; | |
| 2396 case relocInfo::oop_type: { | |
| 2397 stringStream st; | |
| 2398 oop_Relocation* r = iter.oop_reloc(); | |
| 2399 oop obj = r->oop_value(); | |
| 2400 st.print("oop("); | |
| 2401 if (obj == NULL) st.print("NULL"); | |
| 2402 else obj->print_value_on(&st); | |
| 2403 st.print(")"); | |
| 2404 return st.as_string(); | |
| 2405 } | |
| 2406 case relocInfo::virtual_call_type: return "virtual_call"; | |
| 2407 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
| 2408 case relocInfo::static_call_type: return "static_call"; | |
| 2409 case relocInfo::static_stub_type: return "static_stub"; | |
| 2410 case relocInfo::runtime_call_type: return "runtime_call"; | |
| 2411 case relocInfo::external_word_type: return "external_word"; | |
| 2412 case relocInfo::internal_word_type: return "internal_word"; | |
| 2413 case relocInfo::section_word_type: return "section_word"; | |
| 2414 case relocInfo::poll_type: return "poll"; | |
| 2415 case relocInfo::poll_return_type: return "poll_return"; | |
| 2416 case relocInfo::type_mask: return "type_bit_mask"; | |
| 2417 } | |
| 2418 } | |
| 2419 return have_one ? "other" : NULL; | |
| 2420 } | |
| 2421 | |
| 2422 // Return a the last scope in (begin..end] | |
| 2423 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
| 2424 PcDesc* p = pc_desc_near(begin+1); | |
| 2425 if (p != NULL && p->real_pc(this) <= end) { | |
| 2426 return new ScopeDesc(this, p->scope_decode_offset(), | |
|
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72088be4b386
6873116: Modify reexecute implementation to use pcDesc to record the reexecute bit
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diff
changeset
|
2427 p->obj_decode_offset(), p->should_reexecute()); |
| 0 | 2428 } |
| 2429 return NULL; | |
| 2430 } | |
| 2431 | |
|
1155
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|
2432 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
|
4e6abf09f540
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diff
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|
2433 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
|
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diff
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|
2434 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
|
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|
2435 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
|
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diff
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|
2436 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
| 1204 | 2437 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
| 2438 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); | |
|
1155
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diff
changeset
|
2439 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
|
4e6abf09f540
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diff
changeset
|
2440 if (block_begin == entry_point()) { |
|
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diff
changeset
|
2441 methodHandle m = method(); |
|
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diff
changeset
|
2442 if (m.not_null()) { |
|
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diff
changeset
|
2443 stream->print(" # "); |
|
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jrose
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diff
changeset
|
2444 m->print_value_on(stream); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2445 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2446 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2447 if (m.not_null() && !is_osr_method()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2448 ResourceMark rm; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2449 int sizeargs = m->size_of_parameters(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2450 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2451 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2452 { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2453 int sig_index = 0; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2454 if (!m->is_static()) |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2455 sig_bt[sig_index++] = T_OBJECT; // 'this' |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2456 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2457 BasicType t = ss.type(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2458 sig_bt[sig_index++] = t; |
|
4e6abf09f540
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diff
changeset
|
2459 if (type2size[t] == 2) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2460 sig_bt[sig_index++] = T_VOID; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2461 } else { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2462 assert(type2size[t] == 1, "size is 1 or 2"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2463 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2464 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2465 assert(sig_index == sizeargs, ""); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2466 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2467 const char* spname = "sp"; // make arch-specific? |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2468 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
|
4e6abf09f540
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diff
changeset
|
2469 int stack_slot_offset = this->frame_size() * wordSize; |
|
4e6abf09f540
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diff
changeset
|
2470 int tab1 = 14, tab2 = 24; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2471 int sig_index = 0; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2472 int arg_index = (m->is_static() ? 0 : -1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2473 bool did_old_sp = false; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2474 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
|
4e6abf09f540
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diff
changeset
|
2475 bool at_this = (arg_index == -1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2476 bool at_old_sp = false; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2477 BasicType t = (at_this ? T_OBJECT : ss.type()); |
|
4e6abf09f540
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1141
diff
changeset
|
2478 assert(t == sig_bt[sig_index], "sigs in sync"); |
|
4e6abf09f540
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diff
changeset
|
2479 if (at_this) |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2480 stream->print(" # this: "); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2481 else |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2482 stream->print(" # parm%d: ", arg_index); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2483 stream->move_to(tab1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2484 VMReg fst = regs[sig_index].first(); |
|
4e6abf09f540
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diff
changeset
|
2485 VMReg snd = regs[sig_index].second(); |
|
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diff
changeset
|
2486 if (fst->is_reg()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2487 stream->print("%s", fst->name()); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2488 if (snd->is_valid()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2489 stream->print(":%s", snd->name()); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2490 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2491 } else if (fst->is_stack()) { |
|
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2492 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
|
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2493 if (offset == stack_slot_offset) at_old_sp = true; |
|
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2494 stream->print("[%s+0x%x]", spname, offset); |
|
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2495 } else { |
|
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2496 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
|
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2497 } |
|
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2498 stream->print(" "); |
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2499 stream->move_to(tab2); |
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2500 stream->print("= "); |
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2501 if (at_this) { |
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2502 m->method_holder()->print_value_on(stream); |
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|
2503 } else { |
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2504 bool did_name = false; |
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2505 if (!at_this && ss.is_object()) { |
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2506 symbolOop name = ss.as_symbol_or_null(); |
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2507 if (name != NULL) { |
|
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2508 name->print_value_on(stream); |
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2509 did_name = true; |
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|
2510 } |
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|
2511 } |
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|
2512 if (!did_name) |
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2513 stream->print("%s", type2name(t)); |
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2514 } |
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|
2515 if (at_old_sp) { |
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2516 stream->print(" (%s of caller)", spname); |
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2517 did_old_sp = true; |
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|
2518 } |
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|
2519 stream->cr(); |
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|
2520 sig_index += type2size[t]; |
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2521 arg_index += 1; |
|
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2522 if (!at_this) ss.next(); |
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2523 } |
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|
2524 if (!did_old_sp) { |
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2525 stream->print(" # "); |
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2526 stream->move_to(tab1); |
|
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2527 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
|
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|
2528 stream->print(" (%s of caller)", spname); |
|
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|
2529 stream->cr(); |
|
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|
2530 } |
|
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|
2531 } |
|
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|
2532 } |
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|
2533 } |
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|
2534 |
| 0 | 2535 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
| 2536 // First, find an oopmap in (begin, end]. | |
| 2537 // We use the odd half-closed interval so that oop maps and scope descs | |
| 2538 // which are tied to the byte after a call are printed with the call itself. | |
| 2539 address base = instructions_begin(); | |
| 2540 OopMapSet* oms = oop_maps(); | |
| 2541 if (oms != NULL) { | |
| 2542 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
| 2543 OopMap* om = oms->at(i); | |
| 2544 address pc = base + om->offset(); | |
| 2545 if (pc > begin) { | |
| 2546 if (pc <= end) { | |
|
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2547 st->move_to(column); |
|
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|
2548 st->print("; "); |
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|
2549 om->print_on(st); |
| 0 | 2550 } |
| 2551 break; | |
| 2552 } | |
| 2553 } | |
| 2554 } | |
|
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2555 |
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2556 // Print any debug info present at this pc. |
| 0 | 2557 ScopeDesc* sd = scope_desc_in(begin, end); |
| 2558 if (sd != NULL) { | |
|
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2559 st->move_to(column); |
| 0 | 2560 if (sd->bci() == SynchronizationEntryBCI) { |
| 2561 st->print(";*synchronization entry"); | |
| 2562 } else { | |
| 2563 if (sd->method().is_null()) { | |
|
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2564 st->print("method is NULL"); |
| 0 | 2565 } else if (sd->method()->is_native()) { |
|
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2566 st->print("method is native"); |
| 0 | 2567 } else { |
| 2568 address bcp = sd->method()->bcp_from(sd->bci()); | |
| 2569 Bytecodes::Code bc = Bytecodes::java_code_at(bcp); | |
| 2570 st->print(";*%s", Bytecodes::name(bc)); | |
| 2571 switch (bc) { | |
| 2572 case Bytecodes::_invokevirtual: | |
| 2573 case Bytecodes::_invokespecial: | |
| 2574 case Bytecodes::_invokestatic: | |
| 2575 case Bytecodes::_invokeinterface: | |
| 2576 { | |
| 2577 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); | |
| 2578 st->print(" "); | |
| 2579 if (invoke->name() != NULL) | |
| 2580 invoke->name()->print_symbol_on(st); | |
| 2581 else | |
| 2582 st->print("<UNKNOWN>"); | |
| 2583 break; | |
| 2584 } | |
| 2585 case Bytecodes::_getfield: | |
| 2586 case Bytecodes::_putfield: | |
| 2587 case Bytecodes::_getstatic: | |
| 2588 case Bytecodes::_putstatic: | |
| 2589 { | |
| 2590 methodHandle sdm = sd->method(); | |
| 2591 Bytecode_field* field = Bytecode_field_at(sdm(), sdm->bcp_from(sd->bci())); | |
| 2592 constantPoolOop sdmc = sdm->constants(); | |
| 2593 symbolOop name = sdmc->name_ref_at(field->index()); | |
| 2594 st->print(" "); | |
| 2595 if (name != NULL) | |
| 2596 name->print_symbol_on(st); | |
| 2597 else | |
| 2598 st->print("<UNKNOWN>"); | |
| 2599 } | |
| 2600 } | |
| 2601 } | |
| 2602 } | |
|
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|
2603 |
| 0 | 2604 // Print all scopes |
| 2605 for (;sd != NULL; sd = sd->sender()) { | |
|
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|
2606 st->move_to(column); |
| 0 | 2607 st->print("; -"); |
| 2608 if (sd->method().is_null()) { | |
|
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|
2609 st->print("method is NULL"); |
| 0 | 2610 } else { |
| 2611 sd->method()->print_short_name(st); | |
| 2612 } | |
| 2613 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
| 2614 if (lineno != -1) { | |
| 2615 st->print("@%d (line %d)", sd->bci(), lineno); | |
| 2616 } else { | |
| 2617 st->print("@%d", sd->bci()); | |
| 2618 } | |
| 2619 st->cr(); | |
| 2620 } | |
| 2621 } | |
| 2622 | |
| 2623 // Print relocation information | |
| 2624 const char* str = reloc_string_for(begin, end); | |
| 2625 if (str != NULL) { | |
| 2626 if (sd != NULL) st->cr(); | |
|
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|
2627 st->move_to(column); |
| 0 | 2628 st->print("; {%s}", str); |
| 2629 } | |
| 2630 int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); | |
| 2631 if (cont_offset != 0) { | |
|
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|
2632 st->move_to(column); |
| 0 | 2633 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); |
| 2634 } | |
| 2635 | |
| 2636 } | |
| 2637 | |
|
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|
2638 #ifndef PRODUCT |
|
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|
2639 |
| 0 | 2640 void nmethod::print_value_on(outputStream* st) const { |
| 2641 print_on(st, "nmethod"); | |
| 2642 } | |
| 2643 | |
| 2644 void nmethod::print_calls(outputStream* st) { | |
| 2645 RelocIterator iter(this); | |
| 2646 while (iter.next()) { | |
| 2647 switch (iter.type()) { | |
| 2648 case relocInfo::virtual_call_type: | |
| 2649 case relocInfo::opt_virtual_call_type: { | |
| 2650 VerifyMutexLocker mc(CompiledIC_lock); | |
| 2651 CompiledIC_at(iter.reloc())->print(); | |
| 2652 break; | |
| 2653 } | |
| 2654 case relocInfo::static_call_type: | |
| 2655 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
| 2656 compiledStaticCall_at(iter.reloc())->print(); | |
| 2657 break; | |
| 2658 } | |
| 2659 } | |
| 2660 } | |
| 2661 | |
| 2662 void nmethod::print_handler_table() { | |
| 2663 ExceptionHandlerTable(this).print(); | |
| 2664 } | |
| 2665 | |
| 2666 void nmethod::print_nul_chk_table() { | |
| 2667 ImplicitExceptionTable(this).print(instructions_begin()); | |
| 2668 } | |
| 2669 | |
| 2670 void nmethod::print_statistics() { | |
| 2671 ttyLocker ttyl; | |
| 2672 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
| 2673 nmethod_stats.print_native_nmethod_stats(); | |
| 2674 nmethod_stats.print_nmethod_stats(); | |
| 2675 DebugInformationRecorder::print_statistics(); | |
| 2676 nmethod_stats.print_pc_stats(); | |
| 2677 Dependencies::print_statistics(); | |
| 2678 if (xtty != NULL) xtty->tail("statistics"); | |
| 2679 } | |
| 2680 | |
| 2681 #endif // PRODUCT |