Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 1748:3e8fbc61cee8
6978355: renaming for 6961697
Summary: This is the renaming part of 6961697 to keep the actual changes small for review.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Wed, 25 Aug 2010 05:27:54 -0700 |
| parents | 71faaa8e3ccc |
| children | 0878d7bae69f |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 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 } | |
| 1692 | 68 bool nmethod::is_compiled_by_shark() const { |
| 69 if (is_native_method()) return false; | |
| 70 assert(compiler() != NULL, "must be"); | |
| 71 return compiler()->is_shark(); | |
| 72 } | |
| 0 | 73 |
| 74 | |
| 75 | |
| 76 //--------------------------------------------------------------------------------- | |
| 77 // NMethod statistics | |
| 78 // They are printed under various flags, including: | |
| 79 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
| 80 // (In the latter two cases, they like other stats are printed to the log only.) | |
| 81 | |
| 82 #ifndef PRODUCT | |
| 83 // These variables are put into one block to reduce relocations | |
| 84 // and make it simpler to print from the debugger. | |
| 85 static | |
| 86 struct nmethod_stats_struct { | |
| 87 int nmethod_count; | |
| 88 int total_size; | |
| 89 int relocation_size; | |
| 1748 | 90 int insts_size; |
| 0 | 91 int stub_size; |
| 92 int consts_size; | |
| 93 int scopes_data_size; | |
| 94 int scopes_pcs_size; | |
| 95 int dependencies_size; | |
| 96 int handler_table_size; | |
| 97 int nul_chk_table_size; | |
| 98 int oops_size; | |
| 99 | |
| 100 void note_nmethod(nmethod* nm) { | |
| 101 nmethod_count += 1; | |
| 102 total_size += nm->size(); | |
| 103 relocation_size += nm->relocation_size(); | |
| 1748 | 104 insts_size += nm->insts_size(); |
| 0 | 105 stub_size += nm->stub_size(); |
| 106 consts_size += nm->consts_size(); | |
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107 oops_size += nm->oops_size(); |
| 0 | 108 scopes_data_size += nm->scopes_data_size(); |
| 109 scopes_pcs_size += nm->scopes_pcs_size(); | |
| 110 dependencies_size += nm->dependencies_size(); | |
| 111 handler_table_size += nm->handler_table_size(); | |
| 112 nul_chk_table_size += nm->nul_chk_table_size(); | |
| 113 } | |
| 114 void print_nmethod_stats() { | |
| 115 if (nmethod_count == 0) return; | |
| 116 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
| 117 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
| 118 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
| 1748 | 119 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
| 0 | 120 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
| 121 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); | |
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122 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
| 0 | 123 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
| 124 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
| 125 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
| 126 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
| 127 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
| 128 } | |
| 129 | |
| 130 int native_nmethod_count; | |
| 131 int native_total_size; | |
| 132 int native_relocation_size; | |
| 1748 | 133 int native_insts_size; |
| 0 | 134 int native_oops_size; |
| 135 void note_native_nmethod(nmethod* nm) { | |
| 136 native_nmethod_count += 1; | |
| 137 native_total_size += nm->size(); | |
| 138 native_relocation_size += nm->relocation_size(); | |
| 1748 | 139 native_insts_size += nm->insts_size(); |
| 0 | 140 native_oops_size += nm->oops_size(); |
| 141 } | |
| 142 void print_native_nmethod_stats() { | |
| 143 if (native_nmethod_count == 0) return; | |
| 144 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
| 145 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
| 146 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
| 1748 | 147 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
| 0 | 148 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
| 149 } | |
| 150 | |
| 151 int pc_desc_resets; // number of resets (= number of caches) | |
| 152 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
| 153 int pc_desc_approx; // number of those which have approximate true | |
| 154 int pc_desc_repeats; // number of _last_pc_desc hits | |
| 155 int pc_desc_hits; // number of LRU cache hits | |
| 156 int pc_desc_tests; // total number of PcDesc examinations | |
| 157 int pc_desc_searches; // total number of quasi-binary search steps | |
| 158 int pc_desc_adds; // number of LUR cache insertions | |
| 159 | |
| 160 void print_pc_stats() { | |
| 161 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
| 162 pc_desc_queries, | |
| 163 (double)(pc_desc_tests + pc_desc_searches) | |
| 164 / pc_desc_queries); | |
| 165 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
| 166 pc_desc_resets, | |
| 167 pc_desc_queries, pc_desc_approx, | |
| 168 pc_desc_repeats, pc_desc_hits, | |
| 169 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
| 170 } | |
| 171 } nmethod_stats; | |
| 172 #endif //PRODUCT | |
| 173 | |
| 174 //--------------------------------------------------------------------------------- | |
| 175 | |
| 176 | |
| 177 // The _unwind_handler is a special marker address, which says that | |
| 178 // for given exception oop and address, the frame should be removed | |
| 179 // as the tuple cannot be caught in the nmethod | |
| 180 address ExceptionCache::_unwind_handler = (address) -1; | |
| 181 | |
| 182 | |
| 183 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
| 184 assert(pc != NULL, "Must be non null"); | |
| 185 assert(exception.not_null(), "Must be non null"); | |
| 186 assert(handler != NULL, "Must be non null"); | |
| 187 | |
| 188 _count = 0; | |
| 189 _exception_type = exception->klass(); | |
| 190 _next = NULL; | |
| 191 | |
| 192 add_address_and_handler(pc,handler); | |
| 193 } | |
| 194 | |
| 195 | |
| 196 address ExceptionCache::match(Handle exception, address pc) { | |
| 197 assert(pc != NULL,"Must be non null"); | |
| 198 assert(exception.not_null(),"Must be non null"); | |
| 199 if (exception->klass() == exception_type()) { | |
| 200 return (test_address(pc)); | |
| 201 } | |
| 202 | |
| 203 return NULL; | |
| 204 } | |
| 205 | |
| 206 | |
| 207 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
| 208 assert(exception.not_null(),"Must be non null"); | |
| 209 if (exception->klass() == exception_type() && count() < cache_size) { | |
| 210 return true; | |
| 211 } | |
| 212 return false; | |
| 213 } | |
| 214 | |
| 215 | |
| 216 address ExceptionCache::test_address(address addr) { | |
| 217 for (int i=0; i<count(); i++) { | |
| 218 if (pc_at(i) == addr) { | |
| 219 return handler_at(i); | |
| 220 } | |
| 221 } | |
| 222 return NULL; | |
| 223 } | |
| 224 | |
| 225 | |
| 226 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
| 227 if (test_address(addr) == handler) return true; | |
| 228 if (count() < cache_size) { | |
| 229 set_pc_at(count(),addr); | |
| 230 set_handler_at(count(), handler); | |
| 231 increment_count(); | |
| 232 return true; | |
| 233 } | |
| 234 return false; | |
| 235 } | |
| 236 | |
| 237 | |
| 238 // private method for handling exception cache | |
| 239 // These methods are private, and used to manipulate the exception cache | |
| 240 // directly. | |
| 241 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
| 242 ExceptionCache* ec = exception_cache(); | |
| 243 while (ec != NULL) { | |
| 244 if (ec->match_exception_with_space(exception)) { | |
| 245 return ec; | |
| 246 } | |
| 247 ec = ec->next(); | |
| 248 } | |
| 249 return NULL; | |
| 250 } | |
| 251 | |
| 252 | |
| 253 //----------------------------------------------------------------------------- | |
| 254 | |
| 255 | |
| 256 // Helper used by both find_pc_desc methods. | |
| 257 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
| 258 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
| 259 if (!approximate) | |
| 260 return pc->pc_offset() == pc_offset; | |
| 261 else | |
| 262 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
| 263 } | |
| 264 | |
| 265 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
| 266 if (initial_pc_desc == NULL) { | |
| 267 _last_pc_desc = NULL; // native method | |
| 268 return; | |
| 269 } | |
| 270 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
| 271 // reset the cache by filling it with benign (non-null) values | |
| 272 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
| 273 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
| 274 for (int i = 0; i < cache_size; i++) | |
| 275 _pc_descs[i] = initial_pc_desc; | |
| 276 } | |
| 277 | |
| 278 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
| 279 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
| 280 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
| 281 | |
| 282 // In order to prevent race conditions do not load cache elements | |
| 283 // repeatedly, but use a local copy: | |
| 284 PcDesc* res; | |
| 285 | |
| 286 // Step one: Check the most recently returned value. | |
| 287 res = _last_pc_desc; | |
| 288 if (res == NULL) return NULL; // native method; no PcDescs at all | |
| 289 if (match_desc(res, pc_offset, approximate)) { | |
| 290 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
| 291 return res; | |
| 292 } | |
| 293 | |
| 294 // Step two: Check the LRU cache. | |
| 295 for (int i = 0; i < cache_size; i++) { | |
| 296 res = _pc_descs[i]; | |
| 297 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
| 298 if (match_desc(res, pc_offset, approximate)) { | |
| 299 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
| 300 _last_pc_desc = res; // record this cache hit in case of repeat | |
| 301 return res; | |
| 302 } | |
| 303 } | |
| 304 | |
| 305 // Report failure. | |
| 306 return NULL; | |
| 307 } | |
| 308 | |
| 309 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
| 310 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
| 311 // Update the LRU cache by shifting pc_desc forward: | |
| 312 for (int i = 0; i < cache_size; i++) { | |
| 313 PcDesc* next = _pc_descs[i]; | |
| 314 _pc_descs[i] = pc_desc; | |
| 315 pc_desc = next; | |
| 316 } | |
| 317 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
| 318 } | |
| 319 | |
| 320 // adjust pcs_size so that it is a multiple of both oopSize and | |
| 321 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
| 322 // of oopSize, then 2*sizeof(PcDesc) is) | |
| 323 static int adjust_pcs_size(int pcs_size) { | |
| 324 int nsize = round_to(pcs_size, oopSize); | |
| 325 if ((nsize % sizeof(PcDesc)) != 0) { | |
| 326 nsize = pcs_size + sizeof(PcDesc); | |
| 327 } | |
| 328 assert((nsize % oopSize) == 0, "correct alignment"); | |
| 329 return nsize; | |
| 330 } | |
| 331 | |
| 332 //----------------------------------------------------------------------------- | |
| 333 | |
| 334 | |
| 335 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
| 336 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
| 337 assert(new_entry != NULL,"Must be non null"); | |
| 338 assert(new_entry->next() == NULL, "Must be null"); | |
| 339 | |
| 340 if (exception_cache() != NULL) { | |
| 341 new_entry->set_next(exception_cache()); | |
| 342 } | |
| 343 set_exception_cache(new_entry); | |
| 344 } | |
| 345 | |
| 346 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
| 347 ExceptionCache* prev = NULL; | |
| 348 ExceptionCache* curr = exception_cache(); | |
| 349 assert(curr != NULL, "nothing to remove"); | |
| 350 // find the previous and next entry of ec | |
| 351 while (curr != ec) { | |
| 352 prev = curr; | |
| 353 curr = curr->next(); | |
| 354 assert(curr != NULL, "ExceptionCache not found"); | |
| 355 } | |
| 356 // now: curr == ec | |
| 357 ExceptionCache* next = curr->next(); | |
| 358 if (prev == NULL) { | |
| 359 set_exception_cache(next); | |
| 360 } else { | |
| 361 prev->set_next(next); | |
| 362 } | |
| 363 delete curr; | |
| 364 } | |
| 365 | |
| 366 | |
| 367 // public method for accessing the exception cache | |
| 368 // These are the public access methods. | |
| 369 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
| 370 // We never grab a lock to read the exception cache, so we may | |
| 371 // have false negatives. This is okay, as it can only happen during | |
| 372 // the first few exception lookups for a given nmethod. | |
| 373 ExceptionCache* ec = exception_cache(); | |
| 374 while (ec != NULL) { | |
| 375 address ret_val; | |
| 376 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
| 377 return ret_val; | |
| 378 } | |
| 379 ec = ec->next(); | |
| 380 } | |
| 381 return NULL; | |
| 382 } | |
| 383 | |
| 384 | |
| 385 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
| 386 // There are potential race conditions during exception cache updates, so we | |
| 387 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
| 605 | 388 // we don't lock during reads, it is possible to have several threads attempt |
| 0 | 389 // to update the cache with the same data. We need to check for already inserted |
| 390 // copies of the current data before adding it. | |
| 391 | |
| 392 MutexLocker ml(ExceptionCache_lock); | |
| 393 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
| 394 | |
| 395 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
| 396 target_entry = new ExceptionCache(exception,pc,handler); | |
| 397 add_exception_cache_entry(target_entry); | |
| 398 } | |
| 399 } | |
| 400 | |
| 401 | |
| 402 //-------------end of code for ExceptionCache-------------- | |
| 403 | |
| 404 | |
| 405 int nmethod::total_size() const { | |
| 406 return | |
| 1748 | 407 insts_size() + |
| 0 | 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 | |
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422 // Fill in default values for various flag fields |
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423 void nmethod::init_defaults() { |
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424 _state = alive; |
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425 _marked_for_reclamation = 0; |
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426 _has_flushed_dependencies = 0; |
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427 _speculatively_disconnected = 0; |
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428 _has_unsafe_access = 0; |
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429 _has_method_handle_invokes = 0; |
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430 _marked_for_deoptimization = 0; |
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431 _lock_count = 0; |
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432 _stack_traversal_mark = 0; |
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433 _unload_reported = false; // jvmti state |
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434 |
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435 NOT_PRODUCT(_has_debug_info = false); |
| 1726 | 436 #ifdef ASSERT |
| 437 _oops_are_stale = false; | |
| 438 #endif | |
| 439 | |
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440 _oops_do_mark_link = NULL; |
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441 _jmethod_id = NULL; |
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442 _osr_link = NULL; |
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443 _scavenge_root_link = NULL; |
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444 _scavenge_root_state = 0; |
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445 _saved_nmethod_link = NULL; |
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446 _compiler = NULL; |
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447 |
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448 #ifdef HAVE_DTRACE_H |
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449 _trap_offset = 0; |
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450 #endif // def HAVE_DTRACE_H |
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451 } |
| 0 | 452 |
| 453 | |
| 454 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
| 455 CodeBuffer *code_buffer, | |
| 456 int vep_offset, | |
| 457 int frame_complete, | |
| 458 int frame_size, | |
| 459 ByteSize basic_lock_owner_sp_offset, | |
| 460 ByteSize basic_lock_sp_offset, | |
| 461 OopMapSet* oop_maps) { | |
| 462 // create nmethod | |
| 463 nmethod* nm = NULL; | |
| 464 { | |
| 465 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 466 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
| 467 CodeOffsets offsets; | |
| 468 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
| 469 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
| 470 nm = new (native_nmethod_size) | |
| 471 nmethod(method(), native_nmethod_size, &offsets, | |
| 472 code_buffer, frame_size, | |
| 473 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
| 474 oop_maps); | |
| 475 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
| 476 if (PrintAssembly && nm != NULL) | |
| 477 Disassembler::decode(nm); | |
| 478 } | |
| 479 // verify nmethod | |
| 480 debug_only(if (nm) nm->verify();) // might block | |
| 481 | |
| 482 if (nm != NULL) { | |
| 483 nm->log_new_nmethod(); | |
| 484 } | |
| 485 | |
| 486 return nm; | |
| 487 } | |
| 488 | |
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489 #ifdef HAVE_DTRACE_H |
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490 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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491 CodeBuffer *code_buffer, |
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492 int vep_offset, |
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493 int trap_offset, |
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494 int frame_complete, |
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495 int frame_size) { |
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496 // create nmethod |
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497 nmethod* nm = NULL; |
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498 { |
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499 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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500 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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501 CodeOffsets offsets; |
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502 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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503 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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504 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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505 |
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506 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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507 |
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508 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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509 if (PrintAssembly && nm != NULL) |
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510 Disassembler::decode(nm); |
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511 } |
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512 // verify nmethod |
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513 debug_only(if (nm) nm->verify();) // might block |
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514 |
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515 if (nm != NULL) { |
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516 nm->log_new_nmethod(); |
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517 } |
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518 |
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519 return nm; |
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520 } |
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521 |
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522 #endif // def HAVE_DTRACE_H |
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523 |
| 0 | 524 nmethod* nmethod::new_nmethod(methodHandle method, |
| 525 int compile_id, | |
| 526 int entry_bci, | |
| 527 CodeOffsets* offsets, | |
| 528 int orig_pc_offset, | |
| 529 DebugInformationRecorder* debug_info, | |
| 530 Dependencies* dependencies, | |
| 531 CodeBuffer* code_buffer, int frame_size, | |
| 532 OopMapSet* oop_maps, | |
| 533 ExceptionHandlerTable* handler_table, | |
| 534 ImplicitExceptionTable* nul_chk_table, | |
| 535 AbstractCompiler* compiler, | |
| 536 int comp_level | |
| 537 ) | |
| 538 { | |
| 539 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 540 // create nmethod | |
| 541 nmethod* nm = NULL; | |
| 542 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 543 int nmethod_size = | |
| 544 allocation_size(code_buffer, sizeof(nmethod)) | |
| 545 + adjust_pcs_size(debug_info->pcs_size()) | |
| 546 + round_to(dependencies->size_in_bytes() , oopSize) | |
| 547 + round_to(handler_table->size_in_bytes(), oopSize) | |
| 548 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
| 549 + round_to(debug_info->data_size() , oopSize); | |
| 550 nm = new (nmethod_size) | |
| 551 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
| 552 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
| 553 oop_maps, | |
| 554 handler_table, | |
| 555 nul_chk_table, | |
| 556 compiler, | |
| 557 comp_level); | |
| 558 if (nm != NULL) { | |
| 559 // To make dependency checking during class loading fast, record | |
| 560 // the nmethod dependencies in the classes it is dependent on. | |
| 561 // This allows the dependency checking code to simply walk the | |
| 562 // class hierarchy above the loaded class, checking only nmethods | |
| 563 // which are dependent on those classes. The slow way is to | |
| 564 // check every nmethod for dependencies which makes it linear in | |
| 565 // the number of methods compiled. For applications with a lot | |
| 566 // classes the slow way is too slow. | |
| 567 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
| 568 klassOop klass = deps.context_type(); | |
| 569 if (klass == NULL) continue; // ignore things like evol_method | |
| 570 | |
| 571 // record this nmethod as dependent on this klass | |
| 572 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
| 573 } | |
| 574 } | |
| 575 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
| 576 if (PrintAssembly && nm != NULL) | |
| 577 Disassembler::decode(nm); | |
| 578 } | |
| 579 | |
| 580 // verify nmethod | |
| 581 debug_only(if (nm) nm->verify();) // might block | |
| 582 | |
| 583 if (nm != NULL) { | |
| 584 nm->log_new_nmethod(); | |
| 585 } | |
| 586 | |
| 587 // done | |
| 588 return nm; | |
| 589 } | |
| 590 | |
| 591 | |
| 592 // For native wrappers | |
| 593 nmethod::nmethod( | |
| 594 methodOop method, | |
| 595 int nmethod_size, | |
| 596 CodeOffsets* offsets, | |
| 597 CodeBuffer* code_buffer, | |
| 598 int frame_size, | |
| 599 ByteSize basic_lock_owner_sp_offset, | |
| 600 ByteSize basic_lock_sp_offset, | |
| 601 OopMapSet* oop_maps ) | |
| 602 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
| 603 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 604 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), | |
| 605 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) | |
| 606 { | |
| 607 { | |
| 608 debug_only(No_Safepoint_Verifier nsv;) | |
| 609 assert_locked_or_safepoint(CodeCache_lock); | |
| 610 | |
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611 init_defaults(); |
| 0 | 612 _method = method; |
| 613 _entry_bci = InvocationEntryBci; | |
| 614 // We have no exception handler or deopt handler make the | |
| 615 // values something that will never match a pc like the nmethod vtable entry | |
| 616 _exception_offset = 0; | |
| 617 _deoptimize_offset = 0; | |
| 1204 | 618 _deoptimize_mh_offset = 0; |
| 0 | 619 _orig_pc_offset = 0; |
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620 |
| 1748 | 621 _consts_offset = data_offset(); |
| 0 | 622 _stub_offset = data_offset(); |
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623 _oops_offset = data_offset(); |
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624 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
| 0 | 625 _scopes_pcs_offset = _scopes_data_offset; |
| 626 _dependencies_offset = _scopes_pcs_offset; | |
| 627 _handler_table_offset = _dependencies_offset; | |
| 628 _nul_chk_table_offset = _handler_table_offset; | |
| 629 _nmethod_end_offset = _nul_chk_table_offset; | |
| 630 _compile_id = 0; // default | |
| 631 _comp_level = CompLevel_none; | |
| 1748 | 632 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| 633 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 0 | 634 _osr_entry_point = NULL; |
| 635 _exception_cache = NULL; | |
| 636 _pc_desc_cache.reset_to(NULL); | |
| 637 | |
| 638 code_buffer->copy_oops_to(this); | |
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639 debug_only(verify_scavenge_root_oops()); |
| 0 | 640 CodeCache::commit(this); |
| 641 } | |
| 642 | |
| 643 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
| 644 ttyLocker ttyl; // keep the following output all in one block | |
| 645 // This output goes directly to the tty, not the compiler log. | |
| 646 // To enable tools to match it up with the compilation activity, | |
| 647 // be sure to tag this tty output with the compile ID. | |
| 648 if (xtty != NULL) { | |
| 649 xtty->begin_head("print_native_nmethod"); | |
| 650 xtty->method(_method); | |
| 651 xtty->stamp(); | |
| 652 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 653 } | |
| 654 // print the header part first | |
| 655 print(); | |
| 656 // then print the requested information | |
| 657 if (PrintNativeNMethods) { | |
| 658 print_code(); | |
| 659 oop_maps->print(); | |
| 660 } | |
| 661 if (PrintRelocations) { | |
| 662 print_relocations(); | |
| 663 } | |
| 664 if (xtty != NULL) { | |
| 665 xtty->tail("print_native_nmethod"); | |
| 666 } | |
| 667 } | |
| 668 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 669 } | |
| 670 | |
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671 // For dtrace wrappers |
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672 #ifdef HAVE_DTRACE_H |
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673 nmethod::nmethod( |
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674 methodOop method, |
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675 int nmethod_size, |
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676 CodeOffsets* offsets, |
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677 CodeBuffer* code_buffer, |
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678 int frame_size) |
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679 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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680 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
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681 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
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682 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
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683 { |
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684 { |
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685 debug_only(No_Safepoint_Verifier nsv;) |
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686 assert_locked_or_safepoint(CodeCache_lock); |
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687 |
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688 init_defaults(); |
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689 _method = method; |
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690 _entry_bci = InvocationEntryBci; |
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691 // We have no exception handler or deopt handler make the |
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692 // values something that will never match a pc like the nmethod vtable entry |
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693 _exception_offset = 0; |
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694 _deoptimize_offset = 0; |
| 1204 | 695 _deoptimize_mh_offset = 0; |
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696 _unwind_handler_offset = -1; |
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697 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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698 _orig_pc_offset = 0; |
| 1748 | 699 _consts_offset = data_offset(); |
|
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700 _stub_offset = data_offset(); |
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701 _oops_offset = data_offset(); |
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702 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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703 _scopes_pcs_offset = _scopes_data_offset; |
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704 _dependencies_offset = _scopes_pcs_offset; |
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705 _handler_table_offset = _dependencies_offset; |
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706 _nul_chk_table_offset = _handler_table_offset; |
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707 _nmethod_end_offset = _nul_chk_table_offset; |
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708 _compile_id = 0; // default |
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709 _comp_level = CompLevel_none; |
| 1748 | 710 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| 711 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
|
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712 _osr_entry_point = NULL; |
|
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713 _exception_cache = NULL; |
|
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714 _pc_desc_cache.reset_to(NULL); |
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715 |
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716 code_buffer->copy_oops_to(this); |
|
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717 debug_only(verify_scavenge_root_oops()); |
|
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718 CodeCache::commit(this); |
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719 } |
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720 |
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721 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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722 ttyLocker ttyl; // keep the following output all in one block |
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723 // This output goes directly to the tty, not the compiler log. |
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724 // To enable tools to match it up with the compilation activity, |
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725 // be sure to tag this tty output with the compile ID. |
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726 if (xtty != NULL) { |
|
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727 xtty->begin_head("print_dtrace_nmethod"); |
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728 xtty->method(_method); |
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729 xtty->stamp(); |
|
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730 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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731 } |
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732 // print the header part first |
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733 print(); |
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734 // then print the requested information |
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735 if (PrintNMethods) { |
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736 print_code(); |
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737 } |
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738 if (PrintRelocations) { |
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739 print_relocations(); |
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740 } |
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741 if (xtty != NULL) { |
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742 xtty->tail("print_dtrace_nmethod"); |
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743 } |
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744 } |
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745 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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746 } |
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747 #endif // def HAVE_DTRACE_H |
| 0 | 748 |
| 749 void* nmethod::operator new(size_t size, int nmethod_size) { | |
| 750 // Always leave some room in the CodeCache for I2C/C2I adapters | |
| 751 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
| 752 return CodeCache::allocate(nmethod_size); | |
| 753 } | |
| 754 | |
| 755 | |
| 756 nmethod::nmethod( | |
| 757 methodOop method, | |
| 758 int nmethod_size, | |
| 759 int compile_id, | |
| 760 int entry_bci, | |
| 761 CodeOffsets* offsets, | |
| 762 int orig_pc_offset, | |
| 763 DebugInformationRecorder* debug_info, | |
| 764 Dependencies* dependencies, | |
| 765 CodeBuffer *code_buffer, | |
| 766 int frame_size, | |
| 767 OopMapSet* oop_maps, | |
| 768 ExceptionHandlerTable* handler_table, | |
| 769 ImplicitExceptionTable* nul_chk_table, | |
| 770 AbstractCompiler* compiler, | |
| 771 int comp_level | |
| 772 ) | |
| 773 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
| 774 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 775 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), | |
| 776 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) | |
| 777 { | |
| 778 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 779 { | |
| 780 debug_only(No_Safepoint_Verifier nsv;) | |
| 781 assert_locked_or_safepoint(CodeCache_lock); | |
| 782 | |
|
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783 init_defaults(); |
| 0 | 784 _method = method; |
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785 _entry_bci = entry_bci; |
| 0 | 786 _compile_id = compile_id; |
| 787 _comp_level = comp_level; | |
| 788 _compiler = compiler; | |
| 789 _orig_pc_offset = orig_pc_offset; | |
| 1748 | 790 |
| 791 // Section offsets | |
| 792 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); | |
| 793 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); | |
| 0 | 794 |
| 795 // Exception handler and deopt handler are in the stub section | |
| 1748 | 796 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
| 797 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
| 798 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); | |
|
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799 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
| 1748 | 800 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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801 } else { |
| 1748 | 802 _unwind_handler_offset = -1; |
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803 } |
| 1748 | 804 |
|
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805 _oops_offset = data_offset(); |
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806 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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807 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
| 0 | 808 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
| 809 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
| 810 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
| 811 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
| 812 | |
| 1748 | 813 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| 814 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 815 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
| 0 | 816 _exception_cache = NULL; |
| 817 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
| 818 | |
| 819 // Copy contents of ScopeDescRecorder to nmethod | |
| 820 code_buffer->copy_oops_to(this); | |
| 821 debug_info->copy_to(this); | |
| 822 dependencies->copy_to(this); | |
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823 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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824 CodeCache::add_scavenge_root_nmethod(this); |
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825 } |
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826 debug_only(verify_scavenge_root_oops()); |
| 0 | 827 |
| 828 CodeCache::commit(this); | |
| 829 | |
| 830 // Copy contents of ExceptionHandlerTable to nmethod | |
| 831 handler_table->copy_to(this); | |
| 832 nul_chk_table->copy_to(this); | |
| 833 | |
| 834 // we use the information of entry points to find out if a method is | |
| 835 // static or non static | |
| 836 assert(compiler->is_c2() || | |
| 837 _method->is_static() == (entry_point() == _verified_entry_point), | |
| 838 " entry points must be same for static methods and vice versa"); | |
| 839 } | |
| 840 | |
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841 bool printnmethods = PrintNMethods |
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842 || CompilerOracle::should_print(_method) |
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843 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
| 0 | 844 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
| 845 print_nmethod(printnmethods); | |
| 846 } | |
| 847 | |
| 848 // Note: Do not verify in here as the CodeCache_lock is | |
| 849 // taken which would conflict with the CompiledIC_lock | |
| 850 // which taken during the verification of call sites. | |
| 851 // (was bug - gri 10/25/99) | |
| 852 | |
| 853 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 854 } | |
| 855 | |
| 856 | |
| 857 // Print a short set of xml attributes to identify this nmethod. The | |
| 858 // output should be embedded in some other element. | |
| 859 void nmethod::log_identity(xmlStream* log) const { | |
| 860 log->print(" compile_id='%d'", compile_id()); | |
| 861 const char* nm_kind = compile_kind(); | |
| 862 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
| 863 if (compiler() != NULL) { | |
| 864 log->print(" compiler='%s'", compiler()->name()); | |
| 865 } | |
| 866 #ifdef TIERED | |
| 867 log->print(" level='%d'", comp_level()); | |
| 868 #endif // TIERED | |
| 869 } | |
| 870 | |
| 871 | |
| 872 #define LOG_OFFSET(log, name) \ | |
| 873 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
| 874 log->print(" " XSTR(name) "_offset='%d'" , \ | |
| 875 (intptr_t)name##_begin() - (intptr_t)this) | |
| 876 | |
| 877 | |
| 878 void nmethod::log_new_nmethod() const { | |
| 879 if (LogCompilation && xtty != NULL) { | |
| 880 ttyLocker ttyl; | |
| 881 HandleMark hm; | |
| 882 xtty->begin_elem("nmethod"); | |
| 883 log_identity(xtty); | |
| 1748 | 884 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
| 0 | 885 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
| 886 | |
| 887 LOG_OFFSET(xtty, relocation); | |
| 1748 | 888 LOG_OFFSET(xtty, insts); |
| 0 | 889 LOG_OFFSET(xtty, stub); |
| 890 LOG_OFFSET(xtty, consts); | |
| 891 LOG_OFFSET(xtty, scopes_data); | |
| 892 LOG_OFFSET(xtty, scopes_pcs); | |
| 893 LOG_OFFSET(xtty, dependencies); | |
| 894 LOG_OFFSET(xtty, handler_table); | |
| 895 LOG_OFFSET(xtty, nul_chk_table); | |
| 896 LOG_OFFSET(xtty, oops); | |
| 897 | |
| 898 xtty->method(method()); | |
| 899 xtty->stamp(); | |
| 900 xtty->end_elem(); | |
| 901 } | |
| 902 } | |
| 903 | |
| 904 #undef LOG_OFFSET | |
| 905 | |
| 906 | |
| 907 // Print out more verbose output usually for a newly created nmethod. | |
| 908 void nmethod::print_on(outputStream* st, const char* title) const { | |
| 909 if (st != NULL) { | |
| 910 ttyLocker ttyl; | |
| 911 // Print a little tag line that looks like +PrintCompilation output: | |
|
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912 int tlen = (int) strlen(title); |
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913 bool do_nl = false; |
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914 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } |
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915 st->print("%3d%c %.*s", |
| 0 | 916 compile_id(), |
| 917 is_osr_method() ? '%' : | |
| 918 method() != NULL && | |
| 919 is_native_method() ? 'n' : ' ', | |
|
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920 tlen, title); |
| 0 | 921 #ifdef TIERED |
| 922 st->print(" (%d) ", comp_level()); | |
| 923 #endif // TIERED | |
| 924 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); | |
|
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925 if (Universe::heap()->is_gc_active() && method() != NULL) { |
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926 st->print("(method)"); |
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927 } else if (method() != NULL) { |
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928 method()->print_short_name(st); |
| 0 | 929 if (is_osr_method()) |
| 930 st->print(" @ %d", osr_entry_bci()); | |
| 931 if (method()->code_size() > 0) | |
| 932 st->print(" (%d bytes)", method()->code_size()); | |
| 933 } | |
|
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934 |
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935 if (do_nl) st->cr(); |
| 0 | 936 } |
| 937 } | |
| 938 | |
| 939 | |
| 940 void nmethod::print_nmethod(bool printmethod) { | |
| 941 ttyLocker ttyl; // keep the following output all in one block | |
| 942 if (xtty != NULL) { | |
| 943 xtty->begin_head("print_nmethod"); | |
| 944 xtty->stamp(); | |
| 945 xtty->end_head(); | |
| 946 } | |
| 947 // print the header part first | |
| 948 print(); | |
| 949 // then print the requested information | |
| 950 if (printmethod) { | |
| 951 print_code(); | |
| 952 print_pcs(); | |
| 953 oop_maps()->print(); | |
| 954 } | |
| 955 if (PrintDebugInfo) { | |
| 956 print_scopes(); | |
| 957 } | |
| 958 if (PrintRelocations) { | |
| 959 print_relocations(); | |
| 960 } | |
| 961 if (PrintDependencies) { | |
| 962 print_dependencies(); | |
| 963 } | |
| 964 if (PrintExceptionHandlers) { | |
| 965 print_handler_table(); | |
| 966 print_nul_chk_table(); | |
| 967 } | |
| 968 if (xtty != NULL) { | |
| 969 xtty->tail("print_nmethod"); | |
| 970 } | |
| 971 } | |
| 972 | |
| 973 | |
|
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974 // Promote one word from an assembly-time handle to a live embedded oop. |
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975 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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976 if (handle == NULL || |
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977 // As a special case, IC oops are initialized to 1 or -1. |
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978 handle == (jobject) Universe::non_oop_word()) { |
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979 (*dest) = (oop) handle; |
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980 } else { |
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981 (*dest) = JNIHandles::resolve_non_null(handle); |
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982 } |
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983 } |
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984 |
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985 |
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986 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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987 //assert(oops_size() == 0, "do this handshake just once, please"); |
|
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988 int length = array->length(); |
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989 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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990 oop* dest = oops_begin(); |
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991 for (int index = 0 ; index < length; index++) { |
|
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992 initialize_immediate_oop(&dest[index], array->at(index)); |
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993 } |
|
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994 |
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995 // Now we can fix up all the oops in the code. We need to do this |
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996 // in the code because the assembler uses jobjects as placeholders. |
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997 // The code and relocations have already been initialized by the |
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998 // CodeBlob constructor, so it is valid even at this early point to |
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999 // iterate over relocations and patch the code. |
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1000 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1001 } |
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1002 |
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1003 |
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1004 bool nmethod::is_at_poll_return(address pc) { |
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1005 RelocIterator iter(this, pc, pc+1); |
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1006 while (iter.next()) { |
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1007 if (iter.type() == relocInfo::poll_return_type) |
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1008 return true; |
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1009 } |
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1010 return false; |
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1011 } |
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1012 |
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1013 |
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1014 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1015 RelocIterator iter(this, pc, pc+1); |
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1016 while (iter.next()) { |
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1017 relocInfo::relocType t = iter.type(); |
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1018 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1019 return true; |
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1020 } |
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1021 return false; |
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1022 } |
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1023 |
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1024 |
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1025 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1026 // re-patch all oop-bearing instructions, just in case some oops moved |
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1027 RelocIterator iter(this, begin, end); |
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1028 while (iter.next()) { |
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1029 if (iter.type() == relocInfo::oop_type) { |
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1030 oop_Relocation* reloc = iter.oop_reloc(); |
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1031 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1032 oop* dest = reloc->oop_addr(); |
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1033 initialize_immediate_oop(dest, (jobject) *dest); |
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1034 } |
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1035 // Refresh the oop-related bits of this instruction. |
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1036 reloc->fix_oop_relocation(); |
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1037 } |
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1038 |
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1039 // There must not be any interfering patches or breakpoints. |
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1040 assert(!(iter.type() == relocInfo::breakpoint_type |
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1041 && iter.breakpoint_reloc()->active()), |
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1042 "no active breakpoint"); |
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1043 } |
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1044 } |
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1045 |
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1046 |
| 0 | 1047 ScopeDesc* nmethod::scope_desc_at(address pc) { |
| 1048 PcDesc* pd = pc_desc_at(pc); | |
| 1049 guarantee(pd != NULL, "scope must be present"); | |
| 1050 return new ScopeDesc(this, pd->scope_decode_offset(), | |
|
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1051 pd->obj_decode_offset(), pd->should_reexecute(), |
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1052 pd->return_oop()); |
| 0 | 1053 } |
| 1054 | |
| 1055 | |
| 1056 void nmethod::clear_inline_caches() { | |
| 1057 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
| 1058 if (is_zombie()) { | |
| 1059 return; | |
| 1060 } | |
| 1061 | |
| 1062 RelocIterator iter(this); | |
| 1063 while (iter.next()) { | |
| 1064 iter.reloc()->clear_inline_cache(); | |
| 1065 } | |
| 1066 } | |
| 1067 | |
| 1068 | |
| 1069 void nmethod::cleanup_inline_caches() { | |
| 1070 | |
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1071 assert_locked_or_safepoint(CompiledIC_lock); |
| 0 | 1072 |
| 1073 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1074 // first few bytes. If an oop in the old code was there, that oop | |
| 1075 // should not get GC'd. Skip the first few bytes of oops on | |
| 1076 // not-entrant methods. | |
| 1077 address low_boundary = verified_entry_point(); | |
| 1078 if (!is_in_use()) { | |
| 1079 low_boundary += NativeJump::instruction_size; | |
| 1080 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1081 // This means that the low_boundary is going to be a little too high. | |
| 1082 // This shouldn't matter, since oops of non-entrant methods are never used. | |
| 1083 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
| 1084 } | |
| 1085 | |
| 1086 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
| 1087 ResourceMark rm; | |
| 1088 RelocIterator iter(this, low_boundary); | |
| 1089 while(iter.next()) { | |
| 1090 switch(iter.type()) { | |
| 1091 case relocInfo::virtual_call_type: | |
| 1092 case relocInfo::opt_virtual_call_type: { | |
| 1093 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1094 // Ok, to lookup references to zombies here | |
| 1095 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
| 1096 if( cb != NULL && cb->is_nmethod() ) { | |
| 1097 nmethod* nm = (nmethod*)cb; | |
| 1098 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1099 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
| 0 | 1100 } |
| 1101 break; | |
| 1102 } | |
| 1103 case relocInfo::static_call_type: { | |
| 1104 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
| 1105 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
| 1106 if( cb != NULL && cb->is_nmethod() ) { | |
| 1107 nmethod* nm = (nmethod*)cb; | |
| 1108 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1109 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
| 0 | 1110 } |
| 1111 break; | |
| 1112 } | |
| 1113 } | |
| 1114 } | |
| 1115 } | |
| 1116 | |
|
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1117 // This is a private interface with the sweeper. |
| 0 | 1118 void nmethod::mark_as_seen_on_stack() { |
| 1119 assert(is_not_entrant(), "must be a non-entrant method"); | |
|
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1120 // Set the traversal mark to ensure that the sweeper does 2 |
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1121 // cleaning passes before moving to zombie. |
| 0 | 1122 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
| 1123 } | |
| 1124 | |
| 1125 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
| 1126 bool nmethod::can_not_entrant_be_converted() { | |
| 1127 assert(is_not_entrant(), "must be a non-entrant method"); | |
| 1128 | |
| 1129 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
| 1130 // count can be greater than the stack traversal count before it hits the | |
| 1131 // nmethod for the second time. | |
| 1132 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
| 1133 } | |
| 1134 | |
| 1135 void nmethod::inc_decompile_count() { | |
| 1136 // Could be gated by ProfileTraps, but do not bother... | |
| 1137 methodOop m = method(); | |
| 1138 if (m == NULL) return; | |
| 1139 methodDataOop mdo = m->method_data(); | |
| 1140 if (mdo == NULL) return; | |
| 1141 // There is a benign race here. See comments in methodDataOop.hpp. | |
| 1142 mdo->inc_decompile_count(); | |
| 1143 } | |
| 1144 | |
| 1145 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
| 1146 | |
| 1147 post_compiled_method_unload(); | |
| 1148 | |
| 1149 // Since this nmethod is being unloaded, make sure that dependencies | |
| 1150 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
| 1151 // indicate that this work is being done during a GC. | |
| 1152 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
| 1153 assert(is_alive != NULL, "Should be non-NULL"); | |
| 1154 // A non-NULL is_alive closure indicates that this is being called during GC. | |
| 1155 flush_dependencies(is_alive); | |
| 1156 | |
| 1157 // Break cycle between nmethod & method | |
| 1158 if (TraceClassUnloading && WizardMode) { | |
| 1159 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
| 1160 " unloadable], methodOop(" INTPTR_FORMAT | |
| 1161 "), cause(" INTPTR_FORMAT ")", | |
| 1162 this, (address)_method, (address)cause); | |
|
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1163 if (!Universe::heap()->is_gc_active()) |
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1164 cause->klass()->print(); |
| 0 | 1165 } |
| 941 | 1166 // Unlink the osr method, so we do not look this up again |
| 1167 if (is_osr_method()) { | |
| 1168 invalidate_osr_method(); | |
| 1169 } | |
| 0 | 1170 // If _method is already NULL the methodOop is about to be unloaded, |
| 1171 // so we don't have to break the cycle. Note that it is possible to | |
| 1172 // have the methodOop live here, in case we unload the nmethod because | |
| 1173 // it is pointing to some oop (other than the methodOop) being unloaded. | |
| 1174 if (_method != NULL) { | |
| 1175 // OSR methods point to the methodOop, but the methodOop does not | |
| 1176 // point back! | |
| 1177 if (_method->code() == this) { | |
| 1178 _method->clear_code(); // Break a cycle | |
| 1179 } | |
| 1180 _method = NULL; // Clear the method of this dead nmethod | |
| 1181 } | |
| 1182 // Make the class unloaded - i.e., change state and notify sweeper | |
|
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1183 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
| 0 | 1184 if (is_in_use()) { |
| 1185 // Transitioning directly from live to unloaded -- so | |
| 1186 // we need to force a cache clean-up; remember this | |
| 1187 // for later on. | |
| 1188 CodeCache::set_needs_cache_clean(true); | |
| 1189 } | |
|
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1190 _state = unloaded; |
| 0 | 1191 |
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1192 // Log the unloading. |
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1193 log_state_change(); |
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1194 |
| 0 | 1195 // The methodOop is gone at this point |
| 1196 assert(_method == NULL, "Tautology"); | |
| 1197 | |
|
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1198 set_osr_link(NULL); |
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1199 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
| 0 | 1200 NMethodSweeper::notify(this); |
| 1201 } | |
| 1202 | |
| 1203 void nmethod::invalidate_osr_method() { | |
| 1204 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
| 1205 // Remove from list of active nmethods | |
| 1206 if (method() != NULL) | |
| 1207 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
| 1208 // Set entry as invalid | |
| 1209 _entry_bci = InvalidOSREntryBci; | |
| 1210 } | |
| 1211 | |
|
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1212 void nmethod::log_state_change() const { |
| 0 | 1213 if (LogCompilation) { |
| 1214 if (xtty != NULL) { | |
| 1215 ttyLocker ttyl; // keep the following output all in one block | |
|
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1216 if (_state == unloaded) { |
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1217 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1218 os::current_thread_id()); |
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1219 } else { |
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1220 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1221 os::current_thread_id(), |
|
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1222 (_state == zombie ? " zombie='1'" : "")); |
|
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1223 } |
| 0 | 1224 log_identity(xtty); |
| 1225 xtty->stamp(); | |
| 1226 xtty->end_elem(); | |
| 1227 } | |
| 1228 } | |
|
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1229 if (PrintCompilation && _state != unloaded) { |
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1230 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
| 0 | 1231 tty->cr(); |
| 1232 } | |
| 1233 } | |
| 1234 | |
| 1235 // Common functionality for both make_not_entrant and make_zombie | |
| 1141 | 1236 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
| 0 | 1237 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
| 1238 | |
|
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1239 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
| 0 | 1240 nmethodLocker nml(this); |
|
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1241 methodHandle the_method(method()); |
| 1726 | 1242 No_Safepoint_Verifier nsv; |
| 0 | 1243 |
| 1244 { | |
|
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1245 // If the method is already zombie there is nothing to do |
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1246 if (is_zombie()) { |
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1247 return false; |
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1248 } |
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1249 |
|
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1250 // invalidate osr nmethod before acquiring the patching lock since |
|
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1251 // they both acquire leaf locks and we don't want a deadlock. |
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1252 // This logic is equivalent to the logic below for patching the |
|
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1253 // verified entry point of regular methods. |
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1254 if (is_osr_method()) { |
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1255 // this effectively makes the osr nmethod not entrant |
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1256 invalidate_osr_method(); |
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1257 } |
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1258 |
| 0 | 1259 // Enter critical section. Does not block for safepoint. |
| 1260 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
|
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1261 |
|
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1262 if (_state == state) { |
|
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1263 // another thread already performed this transition so nothing |
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1264 // to do, but return false to indicate this. |
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1265 return false; |
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1266 } |
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1267 |
| 0 | 1268 // The caller can be calling the method statically or through an inline |
| 1269 // cache call. | |
|
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1270 if (!is_osr_method() && !is_not_entrant()) { |
| 0 | 1271 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
| 1272 SharedRuntime::get_handle_wrong_method_stub()); | |
| 1273 } | |
| 1274 | |
|
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1275 if (is_in_use()) { |
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1276 // It's a true state change, so mark the method as decompiled. |
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1277 // Do it only for transition from alive. |
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1278 inc_decompile_count(); |
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1279 } |
|
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1280 |
| 0 | 1281 // Change state |
|
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1282 _state = state; |
|
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1283 |
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1284 // Log the transition once |
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1285 log_state_change(); |
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1286 |
|
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1287 // Remove nmethod from method. |
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1288 // We need to check if both the _code and _from_compiled_code_entry_point |
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1289 // refer to this nmethod because there is a race in setting these two fields |
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1290 // in methodOop as seen in bugid 4947125. |
|
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1291 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1292 // could be flushed and the compiler and vtable stubs could still call |
|
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1293 // through it. |
|
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1294 if (method() != NULL && (method()->code() == this || |
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1295 method()->from_compiled_entry() == verified_entry_point())) { |
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1296 HandleMark hm; |
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1297 method()->clear_code(); |
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1298 } |
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1299 |
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1300 if (state == not_entrant) { |
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1301 mark_as_seen_on_stack(); |
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1302 } |
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1303 |
| 0 | 1304 } // leave critical region under Patching_lock |
| 1305 | |
|
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1306 // When the nmethod becomes zombie it is no longer alive so the |
|
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1307 // dependencies must be flushed. nmethods in the not_entrant |
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1308 // state will be flushed later when the transition to zombie |
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1309 // happens or they get unloaded. |
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1310 if (state == zombie) { |
| 1726 | 1311 { |
| 1312 // Flushing dependecies must be done before any possible | |
| 1313 // safepoint can sneak in, otherwise the oops used by the | |
| 1314 // dependency logic could have become stale. | |
| 1315 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1316 flush_dependencies(NULL); | |
| 1317 } | |
|
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1318 |
| 1726 | 1319 { |
| 1320 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
| 1321 // and it hasn't already been reported for this nmethod then report it now. | |
| 1322 // (the event may have been reported earilier if the GC marked it for unloading). | |
| 1323 Pause_No_Safepoint_Verifier pnsv(&nsv); | |
| 1324 post_compiled_method_unload(); | |
| 1325 } | |
| 1326 | |
| 1327 #ifdef ASSERT | |
| 1328 // It's no longer safe to access the oops section since zombie | |
| 1329 // nmethods aren't scanned for GC. | |
| 1330 _oops_are_stale = true; | |
| 1331 #endif | |
|
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1332 } else { |
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1333 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1334 } |
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1335 |
| 0 | 1336 if (TraceCreateZombies) { |
| 1337 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
| 1338 } | |
| 1339 | |
| 1340 // Make sweeper aware that there is a zombie method that needs to be removed | |
| 1341 NMethodSweeper::notify(this); | |
| 1342 | |
|
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1343 return true; |
| 0 | 1344 } |
| 1345 | |
| 1346 void nmethod::flush() { | |
| 1347 // Note that there are no valid oops in the nmethod anymore. | |
| 1348 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
| 1349 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
| 1350 | |
| 1351 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1352 assert_locked_or_safepoint(CodeCache_lock); |
| 0 | 1353 |
| 1354 // completely deallocate this method | |
| 1355 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
| 1356 if (PrintMethodFlushing) { | |
| 1202 | 1357 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
| 1358 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
| 0 | 1359 } |
| 1360 | |
| 1361 // We need to deallocate any ExceptionCache data. | |
| 1362 // Note that we do not need to grab the nmethod lock for this, it | |
| 1363 // better be thread safe if we're disposing of it! | |
| 1364 ExceptionCache* ec = exception_cache(); | |
| 1365 set_exception_cache(NULL); | |
| 1366 while(ec != NULL) { | |
| 1367 ExceptionCache* next = ec->next(); | |
| 1368 delete ec; | |
| 1369 ec = next; | |
| 1370 } | |
| 1371 | |
|
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1372 if (on_scavenge_root_list()) { |
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1373 CodeCache::drop_scavenge_root_nmethod(this); |
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1374 } |
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1375 |
| 1202 | 1376 if (is_speculatively_disconnected()) { |
| 1377 CodeCache::remove_saved_code(this); | |
| 1378 } | |
| 1379 | |
| 1692 | 1380 #ifdef SHARK |
| 1381 ((SharkCompiler *) compiler())->free_compiled_method(instructions_begin()); | |
| 1382 #endif // SHARK | |
| 1383 | |
| 0 | 1384 ((CodeBlob*)(this))->flush(); |
| 1385 | |
| 1386 CodeCache::free(this); | |
| 1387 } | |
| 1388 | |
| 1389 | |
| 1390 // | |
| 1391 // Notify all classes this nmethod is dependent on that it is no | |
| 1392 // longer dependent. This should only be called in two situations. | |
| 1393 // First, when a nmethod transitions to a zombie all dependents need | |
| 1394 // to be clear. Since zombification happens at a safepoint there's no | |
| 1395 // synchronization issues. The second place is a little more tricky. | |
| 1396 // During phase 1 of mark sweep class unloading may happen and as a | |
| 1397 // result some nmethods may get unloaded. In this case the flushing | |
| 1398 // of dependencies must happen during phase 1 since after GC any | |
| 1399 // dependencies in the unloaded nmethod won't be updated, so | |
| 1400 // traversing the dependency information in unsafe. In that case this | |
| 1401 // function is called with a non-NULL argument and this function only | |
| 1402 // notifies instanceKlasses that are reachable | |
| 1403 | |
| 1404 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
|
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1405 assert_locked_or_safepoint(CodeCache_lock); |
| 0 | 1406 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
| 1407 "is_alive is non-NULL if and only if we are called during GC"); | |
| 1408 if (!has_flushed_dependencies()) { | |
| 1409 set_has_flushed_dependencies(); | |
| 1410 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1411 klassOop klass = deps.context_type(); | |
| 1412 if (klass == NULL) continue; // ignore things like evol_method | |
| 1413 | |
| 1414 // During GC the is_alive closure is non-NULL, and is used to | |
| 1415 // determine liveness of dependees that need to be updated. | |
| 1416 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
| 1417 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
| 1418 } | |
| 1419 } | |
| 1420 } | |
| 1421 } | |
| 1422 | |
| 1423 | |
| 1424 // If this oop is not live, the nmethod can be unloaded. | |
| 1425 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
| 1426 OopClosure* keep_alive, | |
| 1427 oop* root, bool unloading_occurred) { | |
| 1428 assert(root != NULL, "just checking"); | |
| 1429 oop obj = *root; | |
| 1430 if (obj == NULL || is_alive->do_object_b(obj)) { | |
| 1431 return false; | |
| 1432 } | |
| 1433 if (obj->is_compiledICHolder()) { | |
| 1434 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
| 1435 if (is_alive->do_object_b( | |
| 1436 cichk_oop->holder_method()->method_holder()) && | |
| 1437 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1438 // The oop should be kept alive | |
| 1439 keep_alive->do_oop(root); | |
| 1440 return false; | |
| 1441 } | |
| 1442 } | |
|
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1443 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1444 // simply because one of its constant oops has gone dead. |
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1445 // No actual classes need to be unloaded in order for this to occur. |
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1446 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
| 0 | 1447 make_unloaded(is_alive, obj); |
| 1448 return true; | |
| 1449 } | |
| 1450 | |
| 1451 // ------------------------------------------------------------------ | |
| 1452 // post_compiled_method_load_event | |
| 1453 // new method for install_code() path | |
| 1454 // Transfer information from compilation to jvmti | |
| 1455 void nmethod::post_compiled_method_load_event() { | |
| 1456 | |
| 1457 methodOop moop = method(); | |
| 1458 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
| 1459 moop->klass_name()->bytes(), | |
| 1460 moop->klass_name()->utf8_length(), | |
| 1461 moop->name()->bytes(), | |
| 1462 moop->name()->utf8_length(), | |
| 1463 moop->signature()->bytes(), | |
| 1464 moop->signature()->utf8_length(), | |
| 1748 | 1465 insts_begin(), insts_size()); |
| 0 | 1466 |
|
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1467 if (JvmtiExport::should_post_compiled_method_load() || |
|
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1468 JvmtiExport::should_post_compiled_method_unload()) { |
|
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1469 get_and_cache_jmethod_id(); |
|
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1470 } |
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1471 |
| 0 | 1472 if (JvmtiExport::should_post_compiled_method_load()) { |
| 1473 JvmtiExport::post_compiled_method_load(this); | |
| 1474 } | |
| 1475 } | |
| 1476 | |
|
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1477 jmethodID nmethod::get_and_cache_jmethod_id() { |
|
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1478 if (_jmethod_id == NULL) { |
|
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1479 // Cache the jmethod_id since it can no longer be looked up once the |
|
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1480 // method itself has been marked for unloading. |
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1481 _jmethod_id = method()->jmethod_id(); |
|
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1482 } |
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1483 return _jmethod_id; |
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1484 } |
|
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1485 |
| 0 | 1486 void nmethod::post_compiled_method_unload() { |
|
1577
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1487 if (unload_reported()) { |
|
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1488 // During unloading we transition to unloaded and then to zombie |
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1489 // and the unloading is reported during the first transition. |
|
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1490 return; |
|
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1491 } |
|
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1492 |
| 0 | 1493 assert(_method != NULL && !is_unloaded(), "just checking"); |
| 1494 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
| 1495 | |
| 1496 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
|
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1497 // post the event. Sometime later this nmethod will be made a zombie |
|
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1498 // by the sweeper but the methodOop will not be valid at that point. |
|
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1499 // If the _jmethod_id is null then no load event was ever requested |
|
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1500 // so don't bother posting the unload. The main reason for this is |
|
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1501 // that the jmethodID is a weak reference to the methodOop so if |
|
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1502 // it's being unloaded there's no way to look it up since the weak |
|
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1503 // ref will have been cleared. |
|
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1504 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
| 0 | 1505 assert(!unload_reported(), "already unloaded"); |
| 1506 HandleMark hm; | |
| 1748 | 1507 JvmtiExport::post_compiled_method_unload(_jmethod_id, insts_begin()); |
| 0 | 1508 } |
| 1509 | |
| 1510 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
| 1511 // any time. As the nmethod is being unloaded now we mark it has | |
| 1512 // having the unload event reported - this will ensure that we don't | |
| 1513 // attempt to report the event in the unlikely scenario where the | |
| 1514 // event is enabled at the time the nmethod is made a zombie. | |
| 1515 set_unload_reported(); | |
| 1516 } | |
| 1517 | |
| 1518 // This is called at the end of the strong tracing/marking phase of a | |
| 1519 // GC to unload an nmethod if it contains otherwise unreachable | |
| 1520 // oops. | |
| 1521 | |
| 1522 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
| 1523 OopClosure* keep_alive, bool unloading_occurred) { | |
| 1524 // Make sure the oop's ready to receive visitors | |
| 1525 assert(!is_zombie() && !is_unloaded(), | |
| 1526 "should not call follow on zombie or unloaded nmethod"); | |
| 1527 | |
| 1528 // If the method is not entrant then a JMP is plastered over the | |
| 1529 // first few bytes. If an oop in the old code was there, that oop | |
| 1530 // should not get GC'd. Skip the first few bytes of oops on | |
| 1531 // not-entrant methods. | |
| 1532 address low_boundary = verified_entry_point(); | |
| 1533 if (is_not_entrant()) { | |
| 1534 low_boundary += NativeJump::instruction_size; | |
| 1535 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1536 // (See comment above.) | |
| 1537 } | |
| 1538 | |
| 1539 // The RedefineClasses() API can cause the class unloading invariant | |
| 1540 // to no longer be true. See jvmtiExport.hpp for details. | |
| 1541 // Also, leave a debugging breadcrumb in local flag. | |
| 1542 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
| 1543 if (a_class_was_redefined) { | |
| 1544 // This set of the unloading_occurred flag is done before the | |
| 1545 // call to post_compiled_method_unload() so that the unloading | |
| 1546 // of this nmethod is reported. | |
| 1547 unloading_occurred = true; | |
| 1548 } | |
| 1549 | |
| 1550 // Follow methodOop | |
| 1551 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
| 1552 return; | |
| 1553 } | |
| 1554 | |
| 1555 // Exception cache | |
| 1556 ExceptionCache* ec = exception_cache(); | |
| 1557 while (ec != NULL) { | |
| 1558 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
| 1559 oop ex = *ex_addr; | |
| 1560 ExceptionCache* next_ec = ec->next(); | |
| 1561 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
| 1562 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
| 1563 remove_from_exception_cache(ec); | |
| 1564 } | |
| 1565 ec = next_ec; | |
| 1566 } | |
| 1567 | |
| 1568 // If class unloading occurred we first iterate over all inline caches and | |
| 1569 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
| 1570 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
| 1571 // iteration below. | |
| 1572 if (unloading_occurred) { | |
| 1573 RelocIterator iter(this, low_boundary); | |
| 1574 while(iter.next()) { | |
| 1575 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1576 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1577 oop ic_oop = ic->cached_oop(); | |
| 1578 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
| 1579 // The only exception is compiledICHolder oops which may | |
| 1580 // yet be marked below. (We check this further below). | |
| 1581 if (ic_oop->is_compiledICHolder()) { | |
| 1582 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
| 1583 if (is_alive->do_object_b( | |
| 1584 cichk_oop->holder_method()->method_holder()) && | |
| 1585 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1586 continue; | |
| 1587 } | |
| 1588 } | |
| 1589 ic->set_to_clean(); | |
|
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6888953: some calls to function-like macros are missing semicolons
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|
1590 assert(ic->cached_oop() == NULL, |
|
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|
1591 "cached oop in IC should be cleared"); |
| 0 | 1592 } |
| 1593 } | |
| 1594 } | |
| 1595 } | |
| 1596 | |
| 1597 // Compiled code | |
| 1598 RelocIterator iter(this, low_boundary); | |
| 1599 while (iter.next()) { | |
| 1600 if (iter.type() == relocInfo::oop_type) { | |
| 1601 oop_Relocation* r = iter.oop_reloc(); | |
| 1602 // In this loop, we must only traverse those oops directly embedded in | |
| 1603 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 1604 assert(1 == (r->oop_is_immediate()) + | |
| 1605 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1606 "oop must be found in exactly one place"); | |
| 1607 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
| 1608 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
| 1609 return; | |
| 1610 } | |
| 1611 } | |
| 1612 } | |
| 1613 } | |
| 1614 | |
| 1615 | |
| 1616 // Scopes | |
| 1617 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
| 1618 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1619 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
| 1620 return; | |
| 1621 } | |
| 1622 } | |
| 1623 | |
| 1624 #ifndef PRODUCT | |
| 1625 // This nmethod was not unloaded; check below that all CompiledICs | |
| 1626 // refer to marked oops. | |
| 1627 { | |
| 1628 RelocIterator iter(this, low_boundary); | |
| 1629 while (iter.next()) { | |
| 1630 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1631 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1632 oop ic_oop = ic->cached_oop(); | |
| 1633 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
| 1634 "Found unmarked ic_oop in reachable nmethod"); | |
| 1635 } | |
| 1636 } | |
| 1637 } | |
| 1638 #endif // !PRODUCT | |
| 1639 } | |
| 1640 | |
| 941 | 1641 // This method is called twice during GC -- once while |
| 1642 // tracing the "active" nmethods on thread stacks during | |
| 1643 // the (strong) marking phase, and then again when walking | |
| 1644 // the code cache contents during the weak roots processing | |
| 1645 // phase. The two uses are distinguished by means of the | |
|
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1646 // 'do_strong_roots_only' flag, which is true in the first |
| 941 | 1647 // case. We want to walk the weak roots in the nmethod |
| 1648 // only in the second case. The weak roots in the nmethod | |
| 1649 // are the oops in the ExceptionCache and the InlineCache | |
| 1650 // oops. | |
|
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jrose
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|
1651 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
| 0 | 1652 // make sure the oops ready to receive visitors |
| 1653 assert(!is_zombie() && !is_unloaded(), | |
| 1654 "should not call follow on zombie or unloaded nmethod"); | |
| 1655 | |
| 1656 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1657 // first few bytes. If an oop in the old code was there, that oop | |
| 1658 // should not get GC'd. Skip the first few bytes of oops on | |
| 1659 // not-entrant methods. | |
| 1660 address low_boundary = verified_entry_point(); | |
| 1661 if (is_not_entrant()) { | |
| 1662 low_boundary += NativeJump::instruction_size; | |
| 1663 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1664 // (See comment above.) | |
| 1665 } | |
| 1666 | |
| 1667 // Compiled code | |
| 1668 f->do_oop((oop*) &_method); | |
|
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|
1669 if (!do_strong_roots_only) { |
| 941 | 1670 // weak roots processing phase -- update ExceptionCache oops |
| 1671 ExceptionCache* ec = exception_cache(); | |
| 1672 while(ec != NULL) { | |
| 1673 f->do_oop((oop*)ec->exception_type_addr()); | |
| 1674 ec = ec->next(); | |
| 1675 } | |
| 1676 } // Else strong roots phase -- skip oops in ExceptionCache | |
| 0 | 1677 |
| 1678 RelocIterator iter(this, low_boundary); | |
| 941 | 1679 |
| 0 | 1680 while (iter.next()) { |
| 1681 if (iter.type() == relocInfo::oop_type ) { | |
| 1682 oop_Relocation* r = iter.oop_reloc(); | |
| 1683 // In this loop, we must only follow those oops directly embedded in | |
| 1684 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 941 | 1685 assert(1 == (r->oop_is_immediate()) + |
| 1686 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1687 "oop must be found in exactly one place"); | |
| 0 | 1688 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
| 1689 f->do_oop(r->oop_addr()); | |
| 1690 } | |
| 1691 } | |
| 1692 } | |
| 1693 | |
| 1694 // Scopes | |
|
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1695 // This includes oop constants not inlined in the code stream. |
| 0 | 1696 for (oop* p = oops_begin(); p < oops_end(); p++) { |
| 1697 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1698 f->do_oop(p); | |
| 1699 } | |
| 1700 } | |
| 1701 | |
|
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1702 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
|
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1703 |
|
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1704 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1705 |
|
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1706 // An nmethod is "marked" if its _mark_link is set non-null. |
|
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1707 // Even if it is the end of the linked list, it will have a non-null link value, |
|
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1708 // as long as it is on the list. |
|
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1709 // This code must be MP safe, because it is used from parallel GC passes. |
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1710 bool nmethod::test_set_oops_do_mark() { |
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1711 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1712 nmethod* observed_mark_link = _oops_do_mark_link; |
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1713 if (observed_mark_link == NULL) { |
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1714 // Claim this nmethod for this thread to mark. |
|
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1715 observed_mark_link = (nmethod*) |
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1716 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1717 if (observed_mark_link == NULL) { |
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1718 |
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1719 // Atomically append this nmethod (now claimed) to the head of the list: |
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1720 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1721 for (;;) { |
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1722 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1723 _oops_do_mark_link = required_mark_nmethods; |
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1724 observed_mark_nmethods = (nmethod*) |
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1725 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1726 if (observed_mark_nmethods == required_mark_nmethods) |
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1727 break; |
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1728 } |
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1729 // Mark was clear when we first saw this guy. |
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1730 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1731 return false; |
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1732 } |
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1733 } |
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1734 // On fall through, another racing thread marked this nmethod before we did. |
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1735 return true; |
|
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1736 } |
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1737 |
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1738 void nmethod::oops_do_marking_prologue() { |
|
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1739 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
|
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1740 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
|
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1741 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1742 // may fork a bunch of threads, and we need them all to see the same state. |
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1743 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1744 guarantee(observed == NULL, "no races in this sequential code"); |
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1745 } |
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1746 |
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1747 void nmethod::oops_do_marking_epilogue() { |
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1748 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1749 nmethod* cur = _oops_do_mark_nmethods; |
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1750 while (cur != NMETHOD_SENTINEL) { |
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1751 assert(cur != NULL, "not NULL-terminated"); |
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1752 nmethod* next = cur->_oops_do_mark_link; |
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1753 cur->_oops_do_mark_link = NULL; |
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1754 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1755 cur = next; |
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1756 } |
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1757 void* required = _oops_do_mark_nmethods; |
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1758 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1759 guarantee(observed == required, "no races in this sequential code"); |
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1760 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1761 } |
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1762 |
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1763 class DetectScavengeRoot: public OopClosure { |
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1764 bool _detected_scavenge_root; |
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1765 public: |
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1766 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1767 { NOT_PRODUCT(_print_nm = NULL); } |
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1768 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1769 virtual void do_oop(oop* p) { |
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1770 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1771 NOT_PRODUCT(maybe_print(p)); |
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1772 _detected_scavenge_root = true; |
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1773 } |
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1774 } |
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1775 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1776 |
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1777 #ifndef PRODUCT |
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1778 nmethod* _print_nm; |
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1779 void maybe_print(oop* p) { |
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1780 if (_print_nm == NULL) return; |
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1781 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1782 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1783 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1784 (intptr_t)(*p), (intptr_t)p); |
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1785 (*p)->print(); |
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1786 } |
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1787 #endif //PRODUCT |
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1788 }; |
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1789 |
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1790 bool nmethod::detect_scavenge_root_oops() { |
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1791 DetectScavengeRoot detect_scavenge_root; |
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1792 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1793 oops_do(&detect_scavenge_root); |
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1794 return detect_scavenge_root.detected_scavenge_root(); |
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1795 } |
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1796 |
| 0 | 1797 // Method that knows how to preserve outgoing arguments at call. This method must be |
| 1798 // called with a frame corresponding to a Java invoke | |
| 1799 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
| 1692 | 1800 #ifndef SHARK |
| 0 | 1801 if (!method()->is_native()) { |
| 1802 SimpleScopeDesc ssd(this, fr.pc()); | |
| 1803 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); | |
|
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1804 bool has_receiver = call->has_receiver(); |
| 0 | 1805 symbolOop signature = call->signature(); |
|
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1806 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
| 0 | 1807 } |
| 1692 | 1808 #endif // !SHARK |
| 0 | 1809 } |
| 1810 | |
| 1811 | |
| 1812 oop nmethod::embeddedOop_at(u_char* p) { | |
| 1813 RelocIterator iter(this, p, p + oopSize); | |
| 1814 while (iter.next()) | |
| 1815 if (iter.type() == relocInfo::oop_type) { | |
| 1816 return iter.oop_reloc()->oop_value(); | |
| 1817 } | |
| 1818 return NULL; | |
| 1819 } | |
| 1820 | |
| 1821 | |
| 1822 inline bool includes(void* p, void* from, void* to) { | |
| 1823 return from <= p && p < to; | |
| 1824 } | |
| 1825 | |
| 1826 | |
| 1827 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
| 1828 assert(count >= 2, "must be sentinel values, at least"); | |
| 1829 | |
| 1830 #ifdef ASSERT | |
| 1831 // must be sorted and unique; we do a binary search in find_pc_desc() | |
| 1832 int prev_offset = pcs[0].pc_offset(); | |
| 1833 assert(prev_offset == PcDesc::lower_offset_limit, | |
| 1834 "must start with a sentinel"); | |
| 1835 for (int i = 1; i < count; i++) { | |
| 1836 int this_offset = pcs[i].pc_offset(); | |
| 1837 assert(this_offset > prev_offset, "offsets must be sorted"); | |
| 1838 prev_offset = this_offset; | |
| 1839 } | |
| 1840 assert(prev_offset == PcDesc::upper_offset_limit, | |
| 1841 "must end with a sentinel"); | |
| 1842 #endif //ASSERT | |
| 1843 | |
|
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1844 // Search for MethodHandle invokes and tag the nmethod. |
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1845 for (int i = 0; i < count; i++) { |
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1846 if (pcs[i].is_method_handle_invoke()) { |
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1847 set_has_method_handle_invokes(true); |
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1848 break; |
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1849 } |
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1850 } |
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1851 |
| 0 | 1852 int size = count * sizeof(PcDesc); |
| 1853 assert(scopes_pcs_size() >= size, "oob"); | |
| 1854 memcpy(scopes_pcs_begin(), pcs, size); | |
| 1855 | |
| 1856 // Adjust the final sentinel downward. | |
| 1857 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
| 1858 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
| 1748 | 1859 last_pc->set_pc_offset(content_size() + 1); |
| 0 | 1860 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
| 1861 // Fill any rounding gaps with copies of the last record. | |
| 1862 last_pc[1] = last_pc[0]; | |
| 1863 } | |
| 1864 // The following assert could fail if sizeof(PcDesc) is not | |
| 1865 // an integral multiple of oopSize (the rounding term). | |
| 1866 // If it fails, change the logic to always allocate a multiple | |
| 1867 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
| 1868 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
| 1869 } | |
| 1870 | |
| 1871 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
| 1872 assert(scopes_data_size() >= size, "oob"); | |
| 1873 memcpy(scopes_data_begin(), buffer, size); | |
| 1874 } | |
| 1875 | |
| 1876 | |
| 1877 #ifdef ASSERT | |
| 1878 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
| 1879 PcDesc* lower = nm->scopes_pcs_begin(); | |
| 1880 PcDesc* upper = nm->scopes_pcs_end(); | |
| 1881 lower += 1; // exclude initial sentinel | |
| 1882 PcDesc* res = NULL; | |
| 1883 for (PcDesc* p = lower; p < upper; p++) { | |
| 1884 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
| 1885 if (match_desc(p, pc_offset, approximate)) { | |
| 1886 if (res == NULL) | |
| 1887 res = p; | |
| 1888 else | |
| 1889 res = (PcDesc*) badAddress; | |
| 1890 } | |
| 1891 } | |
| 1892 return res; | |
| 1893 } | |
| 1894 #endif | |
| 1895 | |
| 1896 | |
| 1897 // Finds a PcDesc with real-pc equal to "pc" | |
| 1898 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
| 1748 | 1899 address base_address = code_begin(); |
| 0 | 1900 if ((pc < base_address) || |
| 1901 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
| 1902 return NULL; // PC is wildly out of range | |
| 1903 } | |
| 1904 int pc_offset = (int) (pc - base_address); | |
| 1905 | |
| 1906 // Check the PcDesc cache if it contains the desired PcDesc | |
| 1907 // (This as an almost 100% hit rate.) | |
| 1908 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
| 1909 if (res != NULL) { | |
| 1910 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
| 1911 return res; | |
| 1912 } | |
| 1913 | |
| 1914 // Fallback algorithm: quasi-linear search for the PcDesc | |
| 1915 // Find the last pc_offset less than the given offset. | |
| 1916 // The successor must be the required match, if there is a match at all. | |
| 1917 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
| 1918 PcDesc* lower = scopes_pcs_begin(); | |
| 1919 PcDesc* upper = scopes_pcs_end(); | |
| 1920 upper -= 1; // exclude final sentinel | |
| 1921 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
| 1922 | |
| 1923 #define assert_LU_OK \ | |
| 1924 /* invariant on lower..upper during the following search: */ \ | |
| 1925 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
| 1926 assert(upper->pc_offset() >= pc_offset, "sanity") | |
| 1927 assert_LU_OK; | |
| 1928 | |
| 1929 // Use the last successful return as a split point. | |
| 1930 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
| 1931 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1932 if (mid->pc_offset() < pc_offset) { | |
| 1933 lower = mid; | |
| 1934 } else { | |
| 1935 upper = mid; | |
| 1936 } | |
| 1937 | |
| 1938 // Take giant steps at first (4096, then 256, then 16, then 1) | |
| 1939 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
| 1940 const int RADIX = (1 << LOG2_RADIX); | |
| 1941 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
| 1942 while ((mid = lower + step) < upper) { | |
| 1943 assert_LU_OK; | |
| 1944 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1945 if (mid->pc_offset() < pc_offset) { | |
| 1946 lower = mid; | |
| 1947 } else { | |
| 1948 upper = mid; | |
| 1949 break; | |
| 1950 } | |
| 1951 } | |
| 1952 assert_LU_OK; | |
| 1953 } | |
| 1954 | |
| 1955 // Sneak up on the value with a linear search of length ~16. | |
| 1956 while (true) { | |
| 1957 assert_LU_OK; | |
| 1958 mid = lower + 1; | |
| 1959 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1960 if (mid->pc_offset() < pc_offset) { | |
| 1961 lower = mid; | |
| 1962 } else { | |
| 1963 upper = mid; | |
| 1964 break; | |
| 1965 } | |
| 1966 } | |
| 1967 #undef assert_LU_OK | |
| 1968 | |
| 1969 if (match_desc(upper, pc_offset, approximate)) { | |
| 1970 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
| 1971 _pc_desc_cache.add_pc_desc(upper); | |
| 1972 return upper; | |
| 1973 } else { | |
| 1974 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
| 1975 return NULL; | |
| 1976 } | |
| 1977 } | |
| 1978 | |
| 1979 | |
| 1980 bool nmethod::check_all_dependencies() { | |
| 1981 bool found_check = false; | |
| 1982 // wholesale check of all dependencies | |
| 1983 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1984 if (deps.check_dependency() != NULL) { | |
| 1985 found_check = true; | |
| 1986 NOT_DEBUG(break); | |
| 1987 } | |
| 1988 } | |
| 1989 return found_check; // tell caller if we found anything | |
| 1990 } | |
| 1991 | |
| 1992 bool nmethod::check_dependency_on(DepChange& changes) { | |
| 1993 // What has happened: | |
| 1994 // 1) a new class dependee has been added | |
| 1995 // 2) dependee and all its super classes have been marked | |
| 1996 bool found_check = false; // set true if we are upset | |
| 1997 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1998 // Evaluate only relevant dependencies. | |
| 1999 if (deps.spot_check_dependency_at(changes) != NULL) { | |
| 2000 found_check = true; | |
| 2001 NOT_DEBUG(break); | |
| 2002 } | |
| 2003 } | |
| 2004 return found_check; | |
| 2005 } | |
| 2006 | |
| 2007 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
| 2008 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
| 2009 objArrayOop dependee_methods = dependee_ik->methods(); | |
| 2010 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2011 if (deps.type() == Dependencies::evol_method) { | |
| 2012 methodOop method = deps.method_argument(0); | |
| 2013 for (int j = 0; j < dependee_methods->length(); j++) { | |
| 2014 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
| 2015 // RC_TRACE macro has an embedded ResourceMark | |
| 2016 RC_TRACE(0x01000000, | |
| 2017 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
| 2018 _method->method_holder()->klass_part()->external_name(), | |
| 2019 _method->name()->as_C_string(), | |
| 2020 _method->signature()->as_C_string(), compile_id(), | |
| 2021 method->method_holder()->klass_part()->external_name(), | |
| 2022 method->name()->as_C_string(), | |
| 2023 method->signature()->as_C_string())); | |
| 2024 if (TraceDependencies || LogCompilation) | |
| 2025 deps.log_dependency(dependee); | |
| 2026 return true; | |
| 2027 } | |
| 2028 } | |
| 2029 } | |
| 2030 } | |
| 2031 return false; | |
| 2032 } | |
| 2033 | |
| 2034 // Called from mark_for_deoptimization, when dependee is invalidated. | |
| 2035 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
| 2036 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2037 if (deps.type() != Dependencies::evol_method) | |
| 2038 continue; | |
| 2039 methodOop method = deps.method_argument(0); | |
| 2040 if (method == dependee) return true; | |
| 2041 } | |
| 2042 return false; | |
| 2043 } | |
| 2044 | |
| 2045 | |
| 2046 bool nmethod::is_patchable_at(address instr_addr) { | |
| 1748 | 2047 assert(insts_contains(instr_addr), "wrong nmethod used"); |
| 0 | 2048 if (is_zombie()) { |
| 2049 // a zombie may never be patched | |
| 2050 return false; | |
| 2051 } | |
| 2052 return true; | |
| 2053 } | |
| 2054 | |
| 2055 | |
| 2056 address nmethod::continuation_for_implicit_exception(address pc) { | |
| 2057 // Exception happened outside inline-cache check code => we are inside | |
| 2058 // an active nmethod => use cpc to determine a return address | |
| 1748 | 2059 int exception_offset = pc - code_begin(); |
| 0 | 2060 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
| 2061 #ifdef ASSERT | |
| 2062 if (cont_offset == 0) { | |
| 2063 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
| 2064 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
| 2065 HandleMark hm(thread); | |
| 2066 ResourceMark rm(thread); | |
| 2067 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2068 assert(cb != NULL && cb == this, ""); | |
| 2069 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
| 2070 print(); | |
| 2071 method()->print_codes(); | |
| 2072 print_code(); | |
| 2073 print_pcs(); | |
| 2074 } | |
| 2075 #endif | |
| 1250 | 2076 if (cont_offset == 0) { |
| 2077 // Let the normal error handling report the exception | |
| 2078 return NULL; | |
| 2079 } | |
| 1748 | 2080 return code_begin() + cont_offset; |
| 0 | 2081 } |
| 2082 | |
| 2083 | |
| 2084 | |
| 2085 void nmethod_init() { | |
| 2086 // make sure you didn't forget to adjust the filler fields | |
| 2087 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
| 2088 } | |
| 2089 | |
| 2090 | |
| 2091 //------------------------------------------------------------------------------------------- | |
| 2092 | |
| 2093 | |
| 2094 // QQQ might we make this work from a frame?? | |
| 2095 nmethodLocker::nmethodLocker(address pc) { | |
| 2096 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2097 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
| 2098 _nm = (nmethod*)cb; | |
| 2099 lock_nmethod(_nm); | |
| 2100 } | |
| 2101 | |
| 2102 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
| 2103 if (nm == NULL) return; | |
| 2104 Atomic::inc(&nm->_lock_count); | |
| 2105 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
| 2106 } | |
| 2107 | |
| 2108 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
| 2109 if (nm == NULL) return; | |
| 2110 Atomic::dec(&nm->_lock_count); | |
| 2111 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
| 2112 } | |
| 2113 | |
| 1204 | 2114 |
| 2115 // ----------------------------------------------------------------------------- | |
| 2116 // nmethod::get_deopt_original_pc | |
| 2117 // | |
| 2118 // Return the original PC for the given PC if: | |
| 2119 // (a) the given PC belongs to a nmethod and | |
| 2120 // (b) it is a deopt PC | |
| 2121 address nmethod::get_deopt_original_pc(const frame* fr) { | |
| 2122 if (fr->cb() == NULL) return NULL; | |
| 2123 | |
| 2124 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
| 2125 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
| 2126 return nm->get_original_pc(fr); | |
| 2127 | |
| 2128 return NULL; | |
| 0 | 2129 } |
| 2130 | |
| 2131 | |
| 2132 // ----------------------------------------------------------------------------- | |
|
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2133 // MethodHandle |
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2134 |
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2135 bool nmethod::is_method_handle_return(address return_pc) { |
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2136 if (!has_method_handle_invokes()) return false; |
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2137 PcDesc* pd = pc_desc_at(return_pc); |
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2138 if (pd == NULL) |
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2139 return false; |
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2140 return pd->is_method_handle_invoke(); |
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2141 } |
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2142 |
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2143 |
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2144 // ----------------------------------------------------------------------------- |
| 0 | 2145 // Verification |
| 2146 | |
|
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2147 class VerifyOopsClosure: public OopClosure { |
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2148 nmethod* _nm; |
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2149 bool _ok; |
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2150 public: |
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2151 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2152 bool ok() { return _ok; } |
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2153 virtual void do_oop(oop* p) { |
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2154 if ((*p) == NULL || (*p)->is_oop()) return; |
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2155 if (_ok) { |
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2156 _nm->print_nmethod(true); |
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2157 _ok = false; |
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2158 } |
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2159 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2160 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2161 } |
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2162 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2163 }; |
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2164 |
| 0 | 2165 void nmethod::verify() { |
| 2166 | |
| 2167 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
| 2168 // seems odd. | |
| 2169 | |
| 2170 if( is_zombie() || is_not_entrant() ) | |
| 2171 return; | |
| 2172 | |
| 2173 // Make sure all the entry points are correctly aligned for patching. | |
| 2174 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
| 2175 | |
| 2176 assert(method()->is_oop(), "must be valid"); | |
| 2177 | |
| 2178 ResourceMark rm; | |
| 2179 | |
| 2180 if (!CodeCache::contains(this)) { | |
|
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2181 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
| 0 | 2182 } |
| 2183 | |
| 2184 if(is_native_method() ) | |
| 2185 return; | |
| 2186 | |
| 2187 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
| 2188 if (nm != this) { | |
|
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2189 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2190 this)); |
| 0 | 2191 } |
| 2192 | |
| 2193 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2194 if (! p->verify(this)) { | |
| 2195 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
| 2196 } | |
| 2197 } | |
| 2198 | |
|
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2199 VerifyOopsClosure voc(this); |
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2200 oops_do(&voc); |
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2201 assert(voc.ok(), "embedded oops must be OK"); |
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2202 verify_scavenge_root_oops(); |
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2203 |
| 0 | 2204 verify_scopes(); |
| 2205 } | |
| 2206 | |
| 2207 | |
| 2208 void nmethod::verify_interrupt_point(address call_site) { | |
| 2209 // This code does not work in release mode since | |
| 2210 // owns_lock only is available in debug mode. | |
| 2211 CompiledIC* ic = NULL; | |
| 2212 Thread *cur = Thread::current(); | |
| 2213 if (CompiledIC_lock->owner() == cur || | |
| 2214 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
| 2215 SafepointSynchronize::is_at_safepoint())) { | |
| 2216 ic = CompiledIC_at(call_site); | |
| 2217 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 2218 } else { | |
| 2219 MutexLocker ml_verify (CompiledIC_lock); | |
| 2220 ic = CompiledIC_at(call_site); | |
| 2221 } | |
| 2222 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
| 2223 assert(pd != NULL, "PcDesc must exist"); | |
| 2224 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
|
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2225 pd->obj_decode_offset(), pd->should_reexecute(), |
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2226 pd->return_oop()); |
| 0 | 2227 !sd->is_top(); sd = sd->sender()) { |
| 2228 sd->verify(); | |
| 2229 } | |
| 2230 } | |
| 2231 | |
| 2232 void nmethod::verify_scopes() { | |
| 2233 if( !method() ) return; // Runtime stubs have no scope | |
| 2234 if (method()->is_native()) return; // Ignore stub methods. | |
| 2235 // iterate through all interrupt point | |
| 2236 // and verify the debug information is valid. | |
| 2237 RelocIterator iter((nmethod*)this); | |
| 2238 while (iter.next()) { | |
| 2239 address stub = NULL; | |
| 2240 switch (iter.type()) { | |
| 2241 case relocInfo::virtual_call_type: | |
| 2242 verify_interrupt_point(iter.addr()); | |
| 2243 break; | |
| 2244 case relocInfo::opt_virtual_call_type: | |
| 2245 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
| 2246 verify_interrupt_point(iter.addr()); | |
| 2247 break; | |
| 2248 case relocInfo::static_call_type: | |
| 2249 stub = iter.static_call_reloc()->static_stub(); | |
| 2250 //verify_interrupt_point(iter.addr()); | |
| 2251 break; | |
| 2252 case relocInfo::runtime_call_type: | |
| 2253 address destination = iter.reloc()->value(); | |
| 2254 // Right now there is no way to find out which entries support | |
| 2255 // an interrupt point. It would be nice if we had this | |
| 2256 // information in a table. | |
| 2257 break; | |
| 2258 } | |
| 2259 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
| 2260 } | |
| 2261 } | |
| 2262 | |
| 2263 | |
| 2264 // ----------------------------------------------------------------------------- | |
| 2265 // Non-product code | |
| 2266 #ifndef PRODUCT | |
| 2267 | |
|
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2268 class DebugScavengeRoot: public OopClosure { |
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2269 nmethod* _nm; |
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2270 bool _ok; |
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2271 public: |
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2272 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2273 bool ok() { return _ok; } |
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2274 virtual void do_oop(oop* p) { |
|
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2275 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
|
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|
2276 if (_ok) { |
|
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|
2277 _nm->print_nmethod(true); |
|
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|
2278 _ok = false; |
|
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|
2279 } |
|
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|
2280 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
|
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|
2281 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
|
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|
2282 (*p)->print(); |
|
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|
2283 } |
|
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|
2284 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
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|
2285 }; |
| 0 | 2286 |
|
989
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|
2287 void nmethod::verify_scavenge_root_oops() { |
|
148e5441d916
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|
2288 if (!on_scavenge_root_list()) { |
|
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|
2289 // Actually look inside, to verify the claim that it's clean. |
|
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|
2290 DebugScavengeRoot debug_scavenge_root(this); |
|
148e5441d916
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|
2291 oops_do(&debug_scavenge_root); |
|
148e5441d916
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|
2292 if (!debug_scavenge_root.ok()) |
|
148e5441d916
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|
2293 fatal("found an unadvertised bad non-perm oop in the code cache"); |
| 0 | 2294 } |
|
989
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|
2295 assert(scavenge_root_not_marked(), ""); |
| 0 | 2296 } |
| 2297 | |
|
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|
2298 #endif // PRODUCT |
| 0 | 2299 |
| 2300 // Printing operations | |
| 2301 | |
| 2302 void nmethod::print() const { | |
| 2303 ResourceMark rm; | |
| 2304 ttyLocker ttyl; // keep the following output all in one block | |
| 2305 | |
| 2306 tty->print("Compiled "); | |
| 2307 | |
| 2308 if (is_compiled_by_c1()) { | |
| 2309 tty->print("(c1) "); | |
| 2310 } else if (is_compiled_by_c2()) { | |
| 2311 tty->print("(c2) "); | |
| 1692 | 2312 } else if (is_compiled_by_shark()) { |
| 2313 tty->print("(shark) "); | |
| 0 | 2314 } else { |
| 2315 tty->print("(nm) "); | |
| 2316 } | |
| 2317 | |
| 2318 print_on(tty, "nmethod"); | |
| 2319 tty->cr(); | |
| 2320 if (WizardMode) { | |
| 2321 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
| 2322 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
| 2323 tty->print(" { "); | |
| 2324 if (is_in_use()) tty->print("in_use "); | |
| 2325 if (is_not_entrant()) tty->print("not_entrant "); | |
| 2326 if (is_zombie()) tty->print("zombie "); | |
| 2327 if (is_unloaded()) tty->print("unloaded "); | |
|
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|
2328 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
| 0 | 2329 tty->print_cr("}:"); |
| 2330 } | |
| 2331 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2332 (address)this, | |
| 2333 (address)this + size(), | |
| 2334 size()); | |
| 2335 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2336 relocation_begin(), | |
| 2337 relocation_end(), | |
| 2338 relocation_size()); | |
| 1748 | 2339 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| 2340 insts_begin(), | |
| 2341 insts_end(), | |
| 2342 insts_size()); | |
| 0 | 2343 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| 2344 stub_begin(), | |
| 2345 stub_end(), | |
| 2346 stub_size()); | |
| 2347 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2348 consts_begin(), | |
| 2349 consts_end(), | |
| 2350 consts_size()); | |
|
1563
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|
2351 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
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|
2352 oops_begin(), |
|
1a5913bf5e19
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diff
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|
2353 oops_end(), |
|
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|
2354 oops_size()); |
| 0 | 2355 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| 2356 scopes_data_begin(), | |
| 2357 scopes_data_end(), | |
| 2358 scopes_data_size()); | |
| 2359 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2360 scopes_pcs_begin(), | |
| 2361 scopes_pcs_end(), | |
| 2362 scopes_pcs_size()); | |
| 2363 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2364 dependencies_begin(), | |
| 2365 dependencies_end(), | |
| 2366 dependencies_size()); | |
| 2367 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2368 handler_table_begin(), | |
| 2369 handler_table_end(), | |
| 2370 handler_table_size()); | |
| 2371 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2372 nul_chk_table_begin(), | |
| 2373 nul_chk_table_end(), | |
| 2374 nul_chk_table_size()); | |
| 2375 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2376 oops_begin(), | |
| 2377 oops_end(), | |
| 2378 oops_size()); | |
| 2379 } | |
| 2380 | |
|
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|
2381 void nmethod::print_code() { |
|
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|
2382 HandleMark hm; |
|
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diff
changeset
|
2383 ResourceMark m; |
|
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diff
changeset
|
2384 Disassembler::decode(this); |
|
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diff
changeset
|
2385 } |
|
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6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2386 |
|
c7c777385a15
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changeset
|
2387 |
|
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diff
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|
2388 #ifndef PRODUCT |
| 0 | 2389 |
| 2390 void nmethod::print_scopes() { | |
| 2391 // Find the first pc desc for all scopes in the code and print it. | |
| 2392 ResourceMark rm; | |
| 2393 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2394 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
| 2395 continue; | |
| 2396 | |
| 2397 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
| 2398 sd->print_on(tty, p); | |
| 2399 } | |
| 2400 } | |
| 2401 | |
| 2402 void nmethod::print_dependencies() { | |
| 2403 ResourceMark rm; | |
| 2404 ttyLocker ttyl; // keep the following output all in one block | |
| 2405 tty->print_cr("Dependencies:"); | |
| 2406 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2407 deps.print_dependency(); | |
| 2408 klassOop ctxk = deps.context_type(); | |
| 2409 if (ctxk != NULL) { | |
| 2410 Klass* k = Klass::cast(ctxk); | |
| 2411 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
| 30 | 2412 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
| 0 | 2413 } |
| 2414 } | |
| 2415 deps.log_dependency(); // put it into the xml log also | |
| 2416 } | |
| 2417 } | |
| 2418 | |
| 2419 | |
| 2420 void nmethod::print_relocations() { | |
| 2421 ResourceMark m; // in case methods get printed via the debugger | |
| 2422 tty->print_cr("relocations:"); | |
| 2423 RelocIterator iter(this); | |
| 2424 iter.print(); | |
| 2425 if (UseRelocIndex) { | |
| 2426 jint* index_end = (jint*)relocation_end() - 1; | |
| 2427 jint index_size = *index_end; | |
| 2428 jint* index_start = (jint*)( (address)index_end - index_size ); | |
| 2429 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
| 2430 if (index_size > 0) { | |
| 2431 jint* ip; | |
| 2432 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
| 2433 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
| 2434 ip[0], | |
| 2435 ip[1], | |
| 2436 header_end()+ip[0], | |
| 2437 relocation_begin()-1+ip[1]); | |
| 2438 for (; ip < index_end; ip++) | |
| 2439 tty->print_cr(" (%d ?)", ip[0]); | |
| 2440 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
| 2441 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
| 2442 } | |
| 2443 } | |
| 2444 } | |
| 2445 | |
| 2446 | |
| 2447 void nmethod::print_pcs() { | |
| 2448 ResourceMark m; // in case methods get printed via debugger | |
| 2449 tty->print_cr("pc-bytecode offsets:"); | |
| 2450 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2451 p->print(this); | |
| 2452 } | |
| 2453 } | |
| 2454 | |
|
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changeset
|
2455 #endif // PRODUCT |
| 0 | 2456 |
| 2457 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
| 2458 RelocIterator iter(this, begin, end); | |
| 2459 bool have_one = false; | |
| 2460 while (iter.next()) { | |
| 2461 have_one = true; | |
| 2462 switch (iter.type()) { | |
| 2463 case relocInfo::none: return "no_reloc"; | |
| 2464 case relocInfo::oop_type: { | |
| 2465 stringStream st; | |
| 2466 oop_Relocation* r = iter.oop_reloc(); | |
| 2467 oop obj = r->oop_value(); | |
| 2468 st.print("oop("); | |
| 2469 if (obj == NULL) st.print("NULL"); | |
| 2470 else obj->print_value_on(&st); | |
| 2471 st.print(")"); | |
| 2472 return st.as_string(); | |
| 2473 } | |
| 2474 case relocInfo::virtual_call_type: return "virtual_call"; | |
| 2475 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
| 2476 case relocInfo::static_call_type: return "static_call"; | |
| 2477 case relocInfo::static_stub_type: return "static_stub"; | |
| 2478 case relocInfo::runtime_call_type: return "runtime_call"; | |
| 2479 case relocInfo::external_word_type: return "external_word"; | |
| 2480 case relocInfo::internal_word_type: return "internal_word"; | |
| 2481 case relocInfo::section_word_type: return "section_word"; | |
| 2482 case relocInfo::poll_type: return "poll"; | |
| 2483 case relocInfo::poll_return_type: return "poll_return"; | |
| 2484 case relocInfo::type_mask: return "type_bit_mask"; | |
| 2485 } | |
| 2486 } | |
| 2487 return have_one ? "other" : NULL; | |
| 2488 } | |
| 2489 | |
| 2490 // Return a the last scope in (begin..end] | |
| 2491 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
| 2492 PcDesc* p = pc_desc_near(begin+1); | |
| 2493 if (p != NULL && p->real_pc(this) <= end) { | |
| 2494 return new ScopeDesc(this, p->scope_decode_offset(), | |
|
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2495 p->obj_decode_offset(), p->should_reexecute(), |
|
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2496 p->return_oop()); |
| 0 | 2497 } |
| 2498 return NULL; | |
| 2499 } | |
| 2500 | |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2501 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2502 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2503 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2504 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2505 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
| 1204 | 2506 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
|
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
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1644
diff
changeset
|
2507 |
|
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
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1644
diff
changeset
|
2508 if (has_method_handle_invokes()) |
|
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
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1644
diff
changeset
|
2509 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
|
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
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1644
diff
changeset
|
2510 |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2511 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
|
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2512 |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2513 if (block_begin == entry_point()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2514 methodHandle m = method(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2515 if (m.not_null()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2516 stream->print(" # "); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2517 m->print_value_on(stream); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2518 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2519 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2520 if (m.not_null() && !is_osr_method()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2521 ResourceMark rm; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2522 int sizeargs = m->size_of_parameters(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2523 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
|
2524 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2525 { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2526 int sig_index = 0; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2527 if (!m->is_static()) |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2528 sig_bt[sig_index++] = T_OBJECT; // 'this' |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2529 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2530 BasicType t = ss.type(); |
|
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diff
changeset
|
2531 sig_bt[sig_index++] = t; |
|
4e6abf09f540
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diff
changeset
|
2532 if (type2size[t] == 2) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2533 sig_bt[sig_index++] = T_VOID; |
|
4e6abf09f540
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diff
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|
2534 } else { |
|
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diff
changeset
|
2535 assert(type2size[t] == 1, "size is 1 or 2"); |
|
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|
2536 } |
|
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changeset
|
2537 } |
|
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changeset
|
2538 assert(sig_index == sizeargs, ""); |
|
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diff
changeset
|
2539 } |
|
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|
2540 const char* spname = "sp"; // make arch-specific? |
|
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diff
changeset
|
2541 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
|
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diff
changeset
|
2542 int stack_slot_offset = this->frame_size() * wordSize; |
|
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diff
changeset
|
2543 int tab1 = 14, tab2 = 24; |
|
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diff
changeset
|
2544 int sig_index = 0; |
|
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diff
changeset
|
2545 int arg_index = (m->is_static() ? 0 : -1); |
|
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|
2546 bool did_old_sp = false; |
|
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changeset
|
2547 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
|
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|
2548 bool at_this = (arg_index == -1); |
|
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diff
changeset
|
2549 bool at_old_sp = false; |
|
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diff
changeset
|
2550 BasicType t = (at_this ? T_OBJECT : ss.type()); |
|
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diff
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|
2551 assert(t == sig_bt[sig_index], "sigs in sync"); |
|
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diff
changeset
|
2552 if (at_this) |
|
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diff
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|
2553 stream->print(" # this: "); |
|
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diff
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|
2554 else |
|
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diff
changeset
|
2555 stream->print(" # parm%d: ", arg_index); |
|
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diff
changeset
|
2556 stream->move_to(tab1); |
|
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diff
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|
2557 VMReg fst = regs[sig_index].first(); |
|
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diff
changeset
|
2558 VMReg snd = regs[sig_index].second(); |
|
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diff
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|
2559 if (fst->is_reg()) { |
|
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diff
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|
2560 stream->print("%s", fst->name()); |
|
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diff
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|
2561 if (snd->is_valid()) { |
|
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diff
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|
2562 stream->print(":%s", snd->name()); |
|
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|
2563 } |
|
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|
2564 } else if (fst->is_stack()) { |
|
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diff
changeset
|
2565 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
|
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diff
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|
2566 if (offset == stack_slot_offset) at_old_sp = true; |
|
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diff
changeset
|
2567 stream->print("[%s+0x%x]", spname, offset); |
|
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diff
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|
2568 } else { |
|
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diff
changeset
|
2569 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
|
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changeset
|
2570 } |
|
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diff
changeset
|
2571 stream->print(" "); |
|
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diff
changeset
|
2572 stream->move_to(tab2); |
|
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diff
changeset
|
2573 stream->print("= "); |
|
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diff
changeset
|
2574 if (at_this) { |
|
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diff
changeset
|
2575 m->method_holder()->print_value_on(stream); |
|
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diff
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|
2576 } else { |
|
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diff
changeset
|
2577 bool did_name = false; |
|
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diff
changeset
|
2578 if (!at_this && ss.is_object()) { |
|
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diff
changeset
|
2579 symbolOop name = ss.as_symbol_or_null(); |
|
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diff
changeset
|
2580 if (name != NULL) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2581 name->print_value_on(stream); |
|
4e6abf09f540
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diff
changeset
|
2582 did_name = true; |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2583 } |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2584 } |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2585 if (!did_name) |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2586 stream->print("%s", type2name(t)); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2587 } |
|
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diff
changeset
|
2588 if (at_old_sp) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2589 stream->print(" (%s of caller)", spname); |
|
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1141
diff
changeset
|
2590 did_old_sp = true; |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2591 } |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2592 stream->cr(); |
|
4e6abf09f540
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diff
changeset
|
2593 sig_index += type2size[t]; |
|
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diff
changeset
|
2594 arg_index += 1; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2595 if (!at_this) ss.next(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2596 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2597 if (!did_old_sp) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2598 stream->print(" # "); |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2599 stream->move_to(tab1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2600 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2601 stream->print(" (%s of caller)", spname); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2602 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2603 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2604 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2605 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2606 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2607 |
| 0 | 2608 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
| 2609 // First, find an oopmap in (begin, end]. | |
| 2610 // We use the odd half-closed interval so that oop maps and scope descs | |
| 2611 // which are tied to the byte after a call are printed with the call itself. | |
| 1748 | 2612 address base = code_begin(); |
| 0 | 2613 OopMapSet* oms = oop_maps(); |
| 2614 if (oms != NULL) { | |
| 2615 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
| 2616 OopMap* om = oms->at(i); | |
| 2617 address pc = base + om->offset(); | |
| 2618 if (pc > begin) { | |
| 2619 if (pc <= end) { | |
|
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2620 st->move_to(column); |
|
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2621 st->print("; "); |
|
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
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diff
changeset
|
2622 om->print_on(st); |
| 0 | 2623 } |
| 2624 break; | |
| 2625 } | |
| 2626 } | |
| 2627 } | |
|
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2628 |
|
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2629 // Print any debug info present at this pc. |
| 0 | 2630 ScopeDesc* sd = scope_desc_in(begin, end); |
| 2631 if (sd != NULL) { | |
|
100
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jrose
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diff
changeset
|
2632 st->move_to(column); |
| 0 | 2633 if (sd->bci() == SynchronizationEntryBCI) { |
| 2634 st->print(";*synchronization entry"); | |
| 2635 } else { | |
| 2636 if (sd->method().is_null()) { | |
|
100
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diff
changeset
|
2637 st->print("method is NULL"); |
| 0 | 2638 } else if (sd->method()->is_native()) { |
|
100
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diff
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|
2639 st->print("method is native"); |
| 0 | 2640 } else { |
| 2641 address bcp = sd->method()->bcp_from(sd->bci()); | |
| 2642 Bytecodes::Code bc = Bytecodes::java_code_at(bcp); | |
| 2643 st->print(";*%s", Bytecodes::name(bc)); | |
| 2644 switch (bc) { | |
| 2645 case Bytecodes::_invokevirtual: | |
| 2646 case Bytecodes::_invokespecial: | |
| 2647 case Bytecodes::_invokestatic: | |
| 2648 case Bytecodes::_invokeinterface: | |
| 2649 { | |
| 2650 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); | |
| 2651 st->print(" "); | |
| 2652 if (invoke->name() != NULL) | |
| 2653 invoke->name()->print_symbol_on(st); | |
| 2654 else | |
| 2655 st->print("<UNKNOWN>"); | |
| 2656 break; | |
| 2657 } | |
| 2658 case Bytecodes::_getfield: | |
| 2659 case Bytecodes::_putfield: | |
| 2660 case Bytecodes::_getstatic: | |
| 2661 case Bytecodes::_putstatic: | |
| 2662 { | |
| 1602 | 2663 Bytecode_field* field = Bytecode_field_at(sd->method(), sd->bci()); |
| 0 | 2664 st->print(" "); |
| 1602 | 2665 if (field->name() != NULL) |
| 2666 field->name()->print_symbol_on(st); | |
| 0 | 2667 else |
| 2668 st->print("<UNKNOWN>"); | |
| 2669 } | |
| 2670 } | |
| 2671 } | |
| 2672 } | |
|
100
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diff
changeset
|
2673 |
| 0 | 2674 // Print all scopes |
| 2675 for (;sd != NULL; sd = sd->sender()) { | |
|
100
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diff
changeset
|
2676 st->move_to(column); |
| 0 | 2677 st->print("; -"); |
| 2678 if (sd->method().is_null()) { | |
|
100
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diff
changeset
|
2679 st->print("method is NULL"); |
| 0 | 2680 } else { |
| 2681 sd->method()->print_short_name(st); | |
| 2682 } | |
| 2683 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
| 2684 if (lineno != -1) { | |
| 2685 st->print("@%d (line %d)", sd->bci(), lineno); | |
| 2686 } else { | |
| 2687 st->print("@%d", sd->bci()); | |
| 2688 } | |
| 2689 st->cr(); | |
| 2690 } | |
| 2691 } | |
| 2692 | |
| 2693 // Print relocation information | |
| 2694 const char* str = reloc_string_for(begin, end); | |
| 2695 if (str != NULL) { | |
| 2696 if (sd != NULL) st->cr(); | |
|
100
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diff
changeset
|
2697 st->move_to(column); |
| 0 | 2698 st->print("; {%s}", str); |
| 2699 } | |
| 1748 | 2700 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
| 0 | 2701 if (cont_offset != 0) { |
|
100
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diff
changeset
|
2702 st->move_to(column); |
| 1748 | 2703 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
| 0 | 2704 } |
| 2705 | |
| 2706 } | |
| 2707 | |
|
100
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|
2708 #ifndef PRODUCT |
|
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30
diff
changeset
|
2709 |
| 0 | 2710 void nmethod::print_value_on(outputStream* st) const { |
| 2711 print_on(st, "nmethod"); | |
| 2712 } | |
| 2713 | |
| 2714 void nmethod::print_calls(outputStream* st) { | |
| 2715 RelocIterator iter(this); | |
| 2716 while (iter.next()) { | |
| 2717 switch (iter.type()) { | |
| 2718 case relocInfo::virtual_call_type: | |
| 2719 case relocInfo::opt_virtual_call_type: { | |
| 2720 VerifyMutexLocker mc(CompiledIC_lock); | |
| 2721 CompiledIC_at(iter.reloc())->print(); | |
| 2722 break; | |
| 2723 } | |
| 2724 case relocInfo::static_call_type: | |
| 2725 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
| 2726 compiledStaticCall_at(iter.reloc())->print(); | |
| 2727 break; | |
| 2728 } | |
| 2729 } | |
| 2730 } | |
| 2731 | |
| 2732 void nmethod::print_handler_table() { | |
| 2733 ExceptionHandlerTable(this).print(); | |
| 2734 } | |
| 2735 | |
| 2736 void nmethod::print_nul_chk_table() { | |
| 1748 | 2737 ImplicitExceptionTable(this).print(code_begin()); |
| 0 | 2738 } |
| 2739 | |
| 2740 void nmethod::print_statistics() { | |
| 2741 ttyLocker ttyl; | |
| 2742 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
| 2743 nmethod_stats.print_native_nmethod_stats(); | |
| 2744 nmethod_stats.print_nmethod_stats(); | |
| 2745 DebugInformationRecorder::print_statistics(); | |
| 2746 nmethod_stats.print_pc_stats(); | |
| 2747 Dependencies::print_statistics(); | |
| 2748 if (xtty != NULL) xtty->tail("statistics"); | |
| 2749 } | |
| 2750 | |
| 2751 #endif // PRODUCT |