Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 1692:d2ede61b7a12
6976186: integrate Shark HotSpot changes
Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure.
Reviewed-by: kvn, twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
| author | twisti |
|---|---|
| date | Wed, 11 Aug 2010 05:51:21 -0700 |
| parents | 4a665be40fd3 |
| children | 71faaa8e3ccc |
| 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; | |
| 90 int code_size; | |
| 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(); | |
| 104 code_size += nm->code_size(); | |
| 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); | |
| 119 if (code_size != 0) tty->print_cr(" main code = %d", code_size); | |
| 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; | |
| 133 int native_code_size; | |
| 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(); | |
| 139 native_code_size += nm->code_size(); | |
| 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); | |
| 147 if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size); | |
| 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 | |
| 407 code_size() + | |
| 408 stub_size() + | |
| 409 consts_size() + | |
| 410 scopes_data_size() + | |
| 411 scopes_pcs_size() + | |
| 412 handler_table_size() + | |
| 413 nul_chk_table_size(); | |
| 414 } | |
| 415 | |
| 416 const char* nmethod::compile_kind() const { | |
| 417 if (is_osr_method()) return "osr"; | |
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418 if (method() != NULL && is_native_method()) return "c2n"; |
| 0 | 419 return NULL; |
| 420 } | |
| 421 | |
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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); |
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436 _oops_do_mark_link = NULL; |
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437 _jmethod_id = NULL; |
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438 _osr_link = NULL; |
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439 _scavenge_root_link = NULL; |
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440 _scavenge_root_state = 0; |
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441 _saved_nmethod_link = NULL; |
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442 _compiler = NULL; |
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443 |
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444 #ifdef HAVE_DTRACE_H |
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445 _trap_offset = 0; |
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446 #endif // def HAVE_DTRACE_H |
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447 } |
| 0 | 448 |
| 449 | |
| 450 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
| 451 CodeBuffer *code_buffer, | |
| 452 int vep_offset, | |
| 453 int frame_complete, | |
| 454 int frame_size, | |
| 455 ByteSize basic_lock_owner_sp_offset, | |
| 456 ByteSize basic_lock_sp_offset, | |
| 457 OopMapSet* oop_maps) { | |
| 458 // create nmethod | |
| 459 nmethod* nm = NULL; | |
| 460 { | |
| 461 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 462 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
| 463 CodeOffsets offsets; | |
| 464 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
| 465 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
| 466 nm = new (native_nmethod_size) | |
| 467 nmethod(method(), native_nmethod_size, &offsets, | |
| 468 code_buffer, frame_size, | |
| 469 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
| 470 oop_maps); | |
| 471 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
| 472 if (PrintAssembly && nm != NULL) | |
| 473 Disassembler::decode(nm); | |
| 474 } | |
| 475 // verify nmethod | |
| 476 debug_only(if (nm) nm->verify();) // might block | |
| 477 | |
| 478 if (nm != NULL) { | |
| 479 nm->log_new_nmethod(); | |
| 480 } | |
| 481 | |
| 482 return nm; | |
| 483 } | |
| 484 | |
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485 #ifdef HAVE_DTRACE_H |
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486 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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487 CodeBuffer *code_buffer, |
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488 int vep_offset, |
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489 int trap_offset, |
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490 int frame_complete, |
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491 int frame_size) { |
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492 // create nmethod |
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493 nmethod* nm = NULL; |
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494 { |
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495 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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496 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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497 CodeOffsets offsets; |
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498 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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499 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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500 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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501 |
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502 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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503 |
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504 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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505 if (PrintAssembly && nm != NULL) |
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506 Disassembler::decode(nm); |
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507 } |
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508 // verify nmethod |
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509 debug_only(if (nm) nm->verify();) // might block |
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510 |
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511 if (nm != NULL) { |
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512 nm->log_new_nmethod(); |
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513 } |
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514 |
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515 return nm; |
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516 } |
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517 |
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518 #endif // def HAVE_DTRACE_H |
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519 |
| 0 | 520 nmethod* nmethod::new_nmethod(methodHandle method, |
| 521 int compile_id, | |
| 522 int entry_bci, | |
| 523 CodeOffsets* offsets, | |
| 524 int orig_pc_offset, | |
| 525 DebugInformationRecorder* debug_info, | |
| 526 Dependencies* dependencies, | |
| 527 CodeBuffer* code_buffer, int frame_size, | |
| 528 OopMapSet* oop_maps, | |
| 529 ExceptionHandlerTable* handler_table, | |
| 530 ImplicitExceptionTable* nul_chk_table, | |
| 531 AbstractCompiler* compiler, | |
| 532 int comp_level | |
| 533 ) | |
| 534 { | |
| 535 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 536 // create nmethod | |
| 537 nmethod* nm = NULL; | |
| 538 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 539 int nmethod_size = | |
| 540 allocation_size(code_buffer, sizeof(nmethod)) | |
| 541 + adjust_pcs_size(debug_info->pcs_size()) | |
| 542 + round_to(dependencies->size_in_bytes() , oopSize) | |
| 543 + round_to(handler_table->size_in_bytes(), oopSize) | |
| 544 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
| 545 + round_to(debug_info->data_size() , oopSize); | |
| 546 nm = new (nmethod_size) | |
| 547 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
| 548 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
| 549 oop_maps, | |
| 550 handler_table, | |
| 551 nul_chk_table, | |
| 552 compiler, | |
| 553 comp_level); | |
| 554 if (nm != NULL) { | |
| 555 // To make dependency checking during class loading fast, record | |
| 556 // the nmethod dependencies in the classes it is dependent on. | |
| 557 // This allows the dependency checking code to simply walk the | |
| 558 // class hierarchy above the loaded class, checking only nmethods | |
| 559 // which are dependent on those classes. The slow way is to | |
| 560 // check every nmethod for dependencies which makes it linear in | |
| 561 // the number of methods compiled. For applications with a lot | |
| 562 // classes the slow way is too slow. | |
| 563 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
| 564 klassOop klass = deps.context_type(); | |
| 565 if (klass == NULL) continue; // ignore things like evol_method | |
| 566 | |
| 567 // record this nmethod as dependent on this klass | |
| 568 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
| 569 } | |
| 570 } | |
| 571 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
| 572 if (PrintAssembly && nm != NULL) | |
| 573 Disassembler::decode(nm); | |
| 574 } | |
| 575 | |
| 576 // verify nmethod | |
| 577 debug_only(if (nm) nm->verify();) // might block | |
| 578 | |
| 579 if (nm != NULL) { | |
| 580 nm->log_new_nmethod(); | |
| 581 } | |
| 582 | |
| 583 // done | |
| 584 return nm; | |
| 585 } | |
| 586 | |
| 587 | |
| 588 // For native wrappers | |
| 589 nmethod::nmethod( | |
| 590 methodOop method, | |
| 591 int nmethod_size, | |
| 592 CodeOffsets* offsets, | |
| 593 CodeBuffer* code_buffer, | |
| 594 int frame_size, | |
| 595 ByteSize basic_lock_owner_sp_offset, | |
| 596 ByteSize basic_lock_sp_offset, | |
| 597 OopMapSet* oop_maps ) | |
| 598 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
| 599 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 600 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), | |
| 601 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) | |
| 602 { | |
| 603 { | |
| 604 debug_only(No_Safepoint_Verifier nsv;) | |
| 605 assert_locked_or_safepoint(CodeCache_lock); | |
| 606 | |
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607 init_defaults(); |
| 0 | 608 _method = method; |
| 609 _entry_bci = InvocationEntryBci; | |
| 610 // We have no exception handler or deopt handler make the | |
| 611 // values something that will never match a pc like the nmethod vtable entry | |
| 612 _exception_offset = 0; | |
| 613 _deoptimize_offset = 0; | |
| 1204 | 614 _deoptimize_mh_offset = 0; |
| 0 | 615 _orig_pc_offset = 0; |
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616 |
| 0 | 617 _stub_offset = data_offset(); |
| 618 _consts_offset = data_offset(); | |
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619 _oops_offset = data_offset(); |
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620 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
| 0 | 621 _scopes_pcs_offset = _scopes_data_offset; |
| 622 _dependencies_offset = _scopes_pcs_offset; | |
| 623 _handler_table_offset = _dependencies_offset; | |
| 624 _nul_chk_table_offset = _handler_table_offset; | |
| 625 _nmethod_end_offset = _nul_chk_table_offset; | |
| 626 _compile_id = 0; // default | |
| 627 _comp_level = CompLevel_none; | |
| 628 _entry_point = instructions_begin(); | |
| 629 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 630 _osr_entry_point = NULL; | |
| 631 _exception_cache = NULL; | |
| 632 _pc_desc_cache.reset_to(NULL); | |
| 633 | |
| 634 code_buffer->copy_oops_to(this); | |
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635 debug_only(verify_scavenge_root_oops()); |
| 0 | 636 CodeCache::commit(this); |
| 637 } | |
| 638 | |
| 639 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
| 640 ttyLocker ttyl; // keep the following output all in one block | |
| 641 // This output goes directly to the tty, not the compiler log. | |
| 642 // To enable tools to match it up with the compilation activity, | |
| 643 // be sure to tag this tty output with the compile ID. | |
| 644 if (xtty != NULL) { | |
| 645 xtty->begin_head("print_native_nmethod"); | |
| 646 xtty->method(_method); | |
| 647 xtty->stamp(); | |
| 648 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 649 } | |
| 650 // print the header part first | |
| 651 print(); | |
| 652 // then print the requested information | |
| 653 if (PrintNativeNMethods) { | |
| 654 print_code(); | |
| 655 oop_maps->print(); | |
| 656 } | |
| 657 if (PrintRelocations) { | |
| 658 print_relocations(); | |
| 659 } | |
| 660 if (xtty != NULL) { | |
| 661 xtty->tail("print_native_nmethod"); | |
| 662 } | |
| 663 } | |
| 664 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 665 } | |
| 666 | |
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667 // For dtrace wrappers |
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668 #ifdef HAVE_DTRACE_H |
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669 nmethod::nmethod( |
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670 methodOop method, |
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671 int nmethod_size, |
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672 CodeOffsets* offsets, |
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673 CodeBuffer* code_buffer, |
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674 int frame_size) |
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675 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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676 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
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677 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
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678 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
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679 { |
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680 { |
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681 debug_only(No_Safepoint_Verifier nsv;) |
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682 assert_locked_or_safepoint(CodeCache_lock); |
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683 |
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684 init_defaults(); |
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685 _method = method; |
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686 _entry_bci = InvocationEntryBci; |
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687 // We have no exception handler or deopt handler make the |
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688 // values something that will never match a pc like the nmethod vtable entry |
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689 _exception_offset = 0; |
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690 _deoptimize_offset = 0; |
| 1204 | 691 _deoptimize_mh_offset = 0; |
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692 _unwind_handler_offset = -1; |
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693 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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694 _orig_pc_offset = 0; |
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695 _stub_offset = data_offset(); |
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696 _consts_offset = data_offset(); |
|
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697 _oops_offset = data_offset(); |
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698 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
|
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699 _scopes_pcs_offset = _scopes_data_offset; |
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700 _dependencies_offset = _scopes_pcs_offset; |
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701 _handler_table_offset = _dependencies_offset; |
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702 _nul_chk_table_offset = _handler_table_offset; |
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703 _nmethod_end_offset = _nul_chk_table_offset; |
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704 _compile_id = 0; // default |
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705 _comp_level = CompLevel_none; |
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706 _entry_point = instructions_begin(); |
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707 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
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708 _osr_entry_point = NULL; |
|
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709 _exception_cache = NULL; |
|
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710 _pc_desc_cache.reset_to(NULL); |
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711 |
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712 code_buffer->copy_oops_to(this); |
|
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713 debug_only(verify_scavenge_root_oops()); |
|
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714 CodeCache::commit(this); |
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715 } |
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716 |
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717 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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718 ttyLocker ttyl; // keep the following output all in one block |
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719 // This output goes directly to the tty, not the compiler log. |
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720 // To enable tools to match it up with the compilation activity, |
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721 // be sure to tag this tty output with the compile ID. |
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722 if (xtty != NULL) { |
|
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723 xtty->begin_head("print_dtrace_nmethod"); |
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724 xtty->method(_method); |
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725 xtty->stamp(); |
|
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726 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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727 } |
|
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728 // print the header part first |
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729 print(); |
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730 // then print the requested information |
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731 if (PrintNMethods) { |
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732 print_code(); |
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733 } |
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734 if (PrintRelocations) { |
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735 print_relocations(); |
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736 } |
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737 if (xtty != NULL) { |
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738 xtty->tail("print_dtrace_nmethod"); |
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739 } |
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740 } |
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741 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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742 } |
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743 #endif // def HAVE_DTRACE_H |
| 0 | 744 |
| 745 void* nmethod::operator new(size_t size, int nmethod_size) { | |
| 746 // Always leave some room in the CodeCache for I2C/C2I adapters | |
| 747 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
| 748 return CodeCache::allocate(nmethod_size); | |
| 749 } | |
| 750 | |
| 751 | |
| 752 nmethod::nmethod( | |
| 753 methodOop method, | |
| 754 int nmethod_size, | |
| 755 int compile_id, | |
| 756 int entry_bci, | |
| 757 CodeOffsets* offsets, | |
| 758 int orig_pc_offset, | |
| 759 DebugInformationRecorder* debug_info, | |
| 760 Dependencies* dependencies, | |
| 761 CodeBuffer *code_buffer, | |
| 762 int frame_size, | |
| 763 OopMapSet* oop_maps, | |
| 764 ExceptionHandlerTable* handler_table, | |
| 765 ImplicitExceptionTable* nul_chk_table, | |
| 766 AbstractCompiler* compiler, | |
| 767 int comp_level | |
| 768 ) | |
| 769 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
| 770 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 771 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), | |
| 772 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) | |
| 773 { | |
| 774 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 775 { | |
| 776 debug_only(No_Safepoint_Verifier nsv;) | |
| 777 assert_locked_or_safepoint(CodeCache_lock); | |
| 778 | |
|
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779 init_defaults(); |
| 0 | 780 _method = method; |
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781 _entry_bci = entry_bci; |
| 0 | 782 _compile_id = compile_id; |
| 783 _comp_level = comp_level; | |
| 784 _compiler = compiler; | |
| 785 _orig_pc_offset = orig_pc_offset; | |
| 786 _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); | |
| 787 | |
| 788 // Exception handler and deopt handler are in the stub section | |
| 789 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); | |
| 790 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
| 1204 | 791 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
|
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792 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
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793 _unwind_handler_offset = instructions_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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794 } else { |
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795 _unwind_handler_offset = -1; |
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796 } |
| 0 | 797 _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); |
|
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798 _oops_offset = data_offset(); |
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799 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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800 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
| 0 | 801 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
| 802 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
| 803 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
| 804 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
| 805 | |
| 806 _entry_point = instructions_begin(); | |
| 807 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 808 _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
| 809 _exception_cache = NULL; | |
| 810 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
| 811 | |
| 812 // Copy contents of ScopeDescRecorder to nmethod | |
| 813 code_buffer->copy_oops_to(this); | |
| 814 debug_info->copy_to(this); | |
| 815 dependencies->copy_to(this); | |
|
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816 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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817 CodeCache::add_scavenge_root_nmethod(this); |
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818 } |
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819 debug_only(verify_scavenge_root_oops()); |
| 0 | 820 |
| 821 CodeCache::commit(this); | |
| 822 | |
| 823 // Copy contents of ExceptionHandlerTable to nmethod | |
| 824 handler_table->copy_to(this); | |
| 825 nul_chk_table->copy_to(this); | |
| 826 | |
| 827 // we use the information of entry points to find out if a method is | |
| 828 // static or non static | |
| 829 assert(compiler->is_c2() || | |
| 830 _method->is_static() == (entry_point() == _verified_entry_point), | |
| 831 " entry points must be same for static methods and vice versa"); | |
| 832 } | |
| 833 | |
|
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834 bool printnmethods = PrintNMethods |
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835 || CompilerOracle::should_print(_method) |
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836 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
| 0 | 837 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
| 838 print_nmethod(printnmethods); | |
| 839 } | |
| 840 | |
| 841 // Note: Do not verify in here as the CodeCache_lock is | |
| 842 // taken which would conflict with the CompiledIC_lock | |
| 843 // which taken during the verification of call sites. | |
| 844 // (was bug - gri 10/25/99) | |
| 845 | |
| 846 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 847 } | |
| 848 | |
| 849 | |
| 850 // Print a short set of xml attributes to identify this nmethod. The | |
| 851 // output should be embedded in some other element. | |
| 852 void nmethod::log_identity(xmlStream* log) const { | |
| 853 log->print(" compile_id='%d'", compile_id()); | |
| 854 const char* nm_kind = compile_kind(); | |
| 855 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
| 856 if (compiler() != NULL) { | |
| 857 log->print(" compiler='%s'", compiler()->name()); | |
| 858 } | |
| 859 #ifdef TIERED | |
| 860 log->print(" level='%d'", comp_level()); | |
| 861 #endif // TIERED | |
| 862 } | |
| 863 | |
| 864 | |
| 865 #define LOG_OFFSET(log, name) \ | |
| 866 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
| 867 log->print(" " XSTR(name) "_offset='%d'" , \ | |
| 868 (intptr_t)name##_begin() - (intptr_t)this) | |
| 869 | |
| 870 | |
| 871 void nmethod::log_new_nmethod() const { | |
| 872 if (LogCompilation && xtty != NULL) { | |
| 873 ttyLocker ttyl; | |
| 874 HandleMark hm; | |
| 875 xtty->begin_elem("nmethod"); | |
| 876 log_identity(xtty); | |
| 877 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", | |
| 878 instructions_begin(), size()); | |
| 879 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 880 | |
| 881 LOG_OFFSET(xtty, relocation); | |
| 882 LOG_OFFSET(xtty, code); | |
| 883 LOG_OFFSET(xtty, stub); | |
| 884 LOG_OFFSET(xtty, consts); | |
| 885 LOG_OFFSET(xtty, scopes_data); | |
| 886 LOG_OFFSET(xtty, scopes_pcs); | |
| 887 LOG_OFFSET(xtty, dependencies); | |
| 888 LOG_OFFSET(xtty, handler_table); | |
| 889 LOG_OFFSET(xtty, nul_chk_table); | |
| 890 LOG_OFFSET(xtty, oops); | |
| 891 | |
| 892 xtty->method(method()); | |
| 893 xtty->stamp(); | |
| 894 xtty->end_elem(); | |
| 895 } | |
| 896 } | |
| 897 | |
| 898 #undef LOG_OFFSET | |
| 899 | |
| 900 | |
| 901 // Print out more verbose output usually for a newly created nmethod. | |
| 902 void nmethod::print_on(outputStream* st, const char* title) const { | |
| 903 if (st != NULL) { | |
| 904 ttyLocker ttyl; | |
| 905 // Print a little tag line that looks like +PrintCompilation output: | |
|
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906 int tlen = (int) strlen(title); |
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907 bool do_nl = false; |
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908 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } |
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909 st->print("%3d%c %.*s", |
| 0 | 910 compile_id(), |
| 911 is_osr_method() ? '%' : | |
| 912 method() != NULL && | |
| 913 is_native_method() ? 'n' : ' ', | |
|
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914 tlen, title); |
| 0 | 915 #ifdef TIERED |
| 916 st->print(" (%d) ", comp_level()); | |
| 917 #endif // TIERED | |
| 918 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); | |
|
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919 if (Universe::heap()->is_gc_active() && method() != NULL) { |
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920 st->print("(method)"); |
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921 } else if (method() != NULL) { |
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922 method()->print_short_name(st); |
| 0 | 923 if (is_osr_method()) |
| 924 st->print(" @ %d", osr_entry_bci()); | |
| 925 if (method()->code_size() > 0) | |
| 926 st->print(" (%d bytes)", method()->code_size()); | |
| 927 } | |
|
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928 |
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929 if (do_nl) st->cr(); |
| 0 | 930 } |
| 931 } | |
| 932 | |
| 933 | |
| 934 void nmethod::print_nmethod(bool printmethod) { | |
| 935 ttyLocker ttyl; // keep the following output all in one block | |
| 936 if (xtty != NULL) { | |
| 937 xtty->begin_head("print_nmethod"); | |
| 938 xtty->stamp(); | |
| 939 xtty->end_head(); | |
| 940 } | |
| 941 // print the header part first | |
| 942 print(); | |
| 943 // then print the requested information | |
| 944 if (printmethod) { | |
| 945 print_code(); | |
| 946 print_pcs(); | |
| 947 oop_maps()->print(); | |
| 948 } | |
| 949 if (PrintDebugInfo) { | |
| 950 print_scopes(); | |
| 951 } | |
| 952 if (PrintRelocations) { | |
| 953 print_relocations(); | |
| 954 } | |
| 955 if (PrintDependencies) { | |
| 956 print_dependencies(); | |
| 957 } | |
| 958 if (PrintExceptionHandlers) { | |
| 959 print_handler_table(); | |
| 960 print_nul_chk_table(); | |
| 961 } | |
| 962 if (xtty != NULL) { | |
| 963 xtty->tail("print_nmethod"); | |
| 964 } | |
| 965 } | |
| 966 | |
| 967 | |
|
1563
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968 // Promote one word from an assembly-time handle to a live embedded oop. |
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969 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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970 if (handle == NULL || |
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971 // As a special case, IC oops are initialized to 1 or -1. |
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972 handle == (jobject) Universe::non_oop_word()) { |
|
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973 (*dest) = (oop) handle; |
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974 } else { |
|
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975 (*dest) = JNIHandles::resolve_non_null(handle); |
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976 } |
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977 } |
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978 |
|
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979 |
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980 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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981 //assert(oops_size() == 0, "do this handshake just once, please"); |
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982 int length = array->length(); |
|
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983 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
|
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984 oop* dest = oops_begin(); |
|
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985 for (int index = 0 ; index < length; index++) { |
|
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986 initialize_immediate_oop(&dest[index], array->at(index)); |
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987 } |
|
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988 |
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989 // Now we can fix up all the oops in the code. We need to do this |
|
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990 // in the code because the assembler uses jobjects as placeholders. |
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991 // The code and relocations have already been initialized by the |
|
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992 // CodeBlob constructor, so it is valid even at this early point to |
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993 // iterate over relocations and patch the code. |
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994 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
|
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995 } |
|
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996 |
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997 |
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998 bool nmethod::is_at_poll_return(address pc) { |
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999 RelocIterator iter(this, pc, pc+1); |
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1000 while (iter.next()) { |
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1001 if (iter.type() == relocInfo::poll_return_type) |
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1002 return true; |
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1003 } |
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1004 return false; |
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1005 } |
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1006 |
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1007 |
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1008 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1009 RelocIterator iter(this, pc, pc+1); |
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1010 while (iter.next()) { |
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1011 relocInfo::relocType t = iter.type(); |
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1012 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1013 return true; |
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1014 } |
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1015 return false; |
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1016 } |
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1017 |
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1018 |
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1019 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1020 // re-patch all oop-bearing instructions, just in case some oops moved |
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1021 RelocIterator iter(this, begin, end); |
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1022 while (iter.next()) { |
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1023 if (iter.type() == relocInfo::oop_type) { |
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1024 oop_Relocation* reloc = iter.oop_reloc(); |
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1025 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1026 oop* dest = reloc->oop_addr(); |
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1027 initialize_immediate_oop(dest, (jobject) *dest); |
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1028 } |
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1029 // Refresh the oop-related bits of this instruction. |
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1030 reloc->fix_oop_relocation(); |
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1031 } |
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1032 |
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1033 // There must not be any interfering patches or breakpoints. |
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1034 assert(!(iter.type() == relocInfo::breakpoint_type |
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1035 && iter.breakpoint_reloc()->active()), |
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1036 "no active breakpoint"); |
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1037 } |
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1038 } |
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1039 |
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1040 |
| 0 | 1041 ScopeDesc* nmethod::scope_desc_at(address pc) { |
| 1042 PcDesc* pd = pc_desc_at(pc); | |
| 1043 guarantee(pd != NULL, "scope must be present"); | |
| 1044 return new ScopeDesc(this, pd->scope_decode_offset(), | |
|
1253
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1045 pd->obj_decode_offset(), pd->should_reexecute(), |
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1046 pd->return_oop()); |
| 0 | 1047 } |
| 1048 | |
| 1049 | |
| 1050 void nmethod::clear_inline_caches() { | |
| 1051 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
| 1052 if (is_zombie()) { | |
| 1053 return; | |
| 1054 } | |
| 1055 | |
| 1056 RelocIterator iter(this); | |
| 1057 while (iter.next()) { | |
| 1058 iter.reloc()->clear_inline_cache(); | |
| 1059 } | |
| 1060 } | |
| 1061 | |
| 1062 | |
| 1063 void nmethod::cleanup_inline_caches() { | |
| 1064 | |
|
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1065 assert_locked_or_safepoint(CompiledIC_lock); |
| 0 | 1066 |
| 1067 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1068 // first few bytes. If an oop in the old code was there, that oop | |
| 1069 // should not get GC'd. Skip the first few bytes of oops on | |
| 1070 // not-entrant methods. | |
| 1071 address low_boundary = verified_entry_point(); | |
| 1072 if (!is_in_use()) { | |
| 1073 low_boundary += NativeJump::instruction_size; | |
| 1074 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1075 // This means that the low_boundary is going to be a little too high. | |
| 1076 // This shouldn't matter, since oops of non-entrant methods are never used. | |
| 1077 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
| 1078 } | |
| 1079 | |
| 1080 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
| 1081 ResourceMark rm; | |
| 1082 RelocIterator iter(this, low_boundary); | |
| 1083 while(iter.next()) { | |
| 1084 switch(iter.type()) { | |
| 1085 case relocInfo::virtual_call_type: | |
| 1086 case relocInfo::opt_virtual_call_type: { | |
| 1087 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1088 // Ok, to lookup references to zombies here | |
| 1089 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
| 1090 if( cb != NULL && cb->is_nmethod() ) { | |
| 1091 nmethod* nm = (nmethod*)cb; | |
| 1092 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1093 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
| 0 | 1094 } |
| 1095 break; | |
| 1096 } | |
| 1097 case relocInfo::static_call_type: { | |
| 1098 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
| 1099 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
| 1100 if( cb != NULL && cb->is_nmethod() ) { | |
| 1101 nmethod* nm = (nmethod*)cb; | |
| 1102 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1103 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
| 0 | 1104 } |
| 1105 break; | |
| 1106 } | |
| 1107 } | |
| 1108 } | |
| 1109 } | |
| 1110 | |
|
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1111 // This is a private interface with the sweeper. |
| 0 | 1112 void nmethod::mark_as_seen_on_stack() { |
| 1113 assert(is_not_entrant(), "must be a non-entrant method"); | |
|
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1114 // Set the traversal mark to ensure that the sweeper does 2 |
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1115 // cleaning passes before moving to zombie. |
| 0 | 1116 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
| 1117 } | |
| 1118 | |
| 1119 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
| 1120 bool nmethod::can_not_entrant_be_converted() { | |
| 1121 assert(is_not_entrant(), "must be a non-entrant method"); | |
| 1122 | |
| 1123 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
| 1124 // count can be greater than the stack traversal count before it hits the | |
| 1125 // nmethod for the second time. | |
| 1126 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
| 1127 } | |
| 1128 | |
| 1129 void nmethod::inc_decompile_count() { | |
| 1130 // Could be gated by ProfileTraps, but do not bother... | |
| 1131 methodOop m = method(); | |
| 1132 if (m == NULL) return; | |
| 1133 methodDataOop mdo = m->method_data(); | |
| 1134 if (mdo == NULL) return; | |
| 1135 // There is a benign race here. See comments in methodDataOop.hpp. | |
| 1136 mdo->inc_decompile_count(); | |
| 1137 } | |
| 1138 | |
| 1139 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
| 1140 | |
| 1141 post_compiled_method_unload(); | |
| 1142 | |
| 1143 // Since this nmethod is being unloaded, make sure that dependencies | |
| 1144 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
| 1145 // indicate that this work is being done during a GC. | |
| 1146 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
| 1147 assert(is_alive != NULL, "Should be non-NULL"); | |
| 1148 // A non-NULL is_alive closure indicates that this is being called during GC. | |
| 1149 flush_dependencies(is_alive); | |
| 1150 | |
| 1151 // Break cycle between nmethod & method | |
| 1152 if (TraceClassUnloading && WizardMode) { | |
| 1153 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
| 1154 " unloadable], methodOop(" INTPTR_FORMAT | |
| 1155 "), cause(" INTPTR_FORMAT ")", | |
| 1156 this, (address)_method, (address)cause); | |
|
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1157 if (!Universe::heap()->is_gc_active()) |
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1158 cause->klass()->print(); |
| 0 | 1159 } |
| 941 | 1160 // Unlink the osr method, so we do not look this up again |
| 1161 if (is_osr_method()) { | |
| 1162 invalidate_osr_method(); | |
| 1163 } | |
| 0 | 1164 // If _method is already NULL the methodOop is about to be unloaded, |
| 1165 // so we don't have to break the cycle. Note that it is possible to | |
| 1166 // have the methodOop live here, in case we unload the nmethod because | |
| 1167 // it is pointing to some oop (other than the methodOop) being unloaded. | |
| 1168 if (_method != NULL) { | |
| 1169 // OSR methods point to the methodOop, but the methodOop does not | |
| 1170 // point back! | |
| 1171 if (_method->code() == this) { | |
| 1172 _method->clear_code(); // Break a cycle | |
| 1173 } | |
| 1174 _method = NULL; // Clear the method of this dead nmethod | |
| 1175 } | |
| 1176 // Make the class unloaded - i.e., change state and notify sweeper | |
|
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1177 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
| 0 | 1178 if (is_in_use()) { |
| 1179 // Transitioning directly from live to unloaded -- so | |
| 1180 // we need to force a cache clean-up; remember this | |
| 1181 // for later on. | |
| 1182 CodeCache::set_needs_cache_clean(true); | |
| 1183 } | |
|
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1184 _state = unloaded; |
| 0 | 1185 |
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1186 // Log the unloading. |
|
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1187 log_state_change(); |
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1188 |
| 0 | 1189 // The methodOop is gone at this point |
| 1190 assert(_method == NULL, "Tautology"); | |
| 1191 | |
|
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1192 set_osr_link(NULL); |
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1193 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
| 0 | 1194 NMethodSweeper::notify(this); |
| 1195 } | |
| 1196 | |
| 1197 void nmethod::invalidate_osr_method() { | |
| 1198 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
| 1199 // Remove from list of active nmethods | |
| 1200 if (method() != NULL) | |
| 1201 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
| 1202 // Set entry as invalid | |
| 1203 _entry_bci = InvalidOSREntryBci; | |
| 1204 } | |
| 1205 | |
|
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1206 void nmethod::log_state_change() const { |
| 0 | 1207 if (LogCompilation) { |
| 1208 if (xtty != NULL) { | |
| 1209 ttyLocker ttyl; // keep the following output all in one block | |
|
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1210 if (_state == unloaded) { |
|
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1211 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1212 os::current_thread_id()); |
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1213 } else { |
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1214 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1215 os::current_thread_id(), |
|
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1216 (_state == zombie ? " zombie='1'" : "")); |
|
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1217 } |
| 0 | 1218 log_identity(xtty); |
| 1219 xtty->stamp(); | |
| 1220 xtty->end_elem(); | |
| 1221 } | |
| 1222 } | |
|
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1223 if (PrintCompilation && _state != unloaded) { |
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1224 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
| 0 | 1225 tty->cr(); |
| 1226 } | |
| 1227 } | |
| 1228 | |
| 1229 // Common functionality for both make_not_entrant and make_zombie | |
| 1141 | 1230 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
| 0 | 1231 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
| 1232 | |
|
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1233 bool was_alive = false; |
| 0 | 1234 |
|
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1235 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
| 0 | 1236 nmethodLocker nml(this); |
|
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1237 methodHandle the_method(method()); |
| 0 | 1238 |
| 1239 { | |
|
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1240 // If the method is already zombie there is nothing to do |
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1241 if (is_zombie()) { |
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1242 return false; |
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1243 } |
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1244 |
|
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1245 // invalidate osr nmethod before acquiring the patching lock since |
|
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1246 // they both acquire leaf locks and we don't want a deadlock. |
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1247 // This logic is equivalent to the logic below for patching the |
|
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1248 // verified entry point of regular methods. |
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1249 if (is_osr_method()) { |
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1250 // this effectively makes the osr nmethod not entrant |
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1251 invalidate_osr_method(); |
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1252 } |
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1253 |
| 0 | 1254 // Enter critical section. Does not block for safepoint. |
| 1255 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
|
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1256 |
|
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1257 if (_state == state) { |
|
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1258 // another thread already performed this transition so nothing |
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1259 // to do, but return false to indicate this. |
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1260 return false; |
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1261 } |
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1262 |
| 0 | 1263 // The caller can be calling the method statically or through an inline |
| 1264 // cache call. | |
|
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1265 if (!is_osr_method() && !is_not_entrant()) { |
| 0 | 1266 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
| 1267 SharedRuntime::get_handle_wrong_method_stub()); | |
| 1268 } | |
| 1269 | |
|
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1270 if (is_in_use()) { |
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1271 // It's a true state change, so mark the method as decompiled. |
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1272 // Do it only for transition from alive. |
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1273 inc_decompile_count(); |
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1274 } |
|
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1275 |
| 0 | 1276 // Change state |
|
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1277 _state = state; |
|
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1278 |
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1279 // Log the transition once |
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1280 log_state_change(); |
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1281 |
|
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1282 // Remove nmethod from method. |
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1283 // We need to check if both the _code and _from_compiled_code_entry_point |
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1284 // refer to this nmethod because there is a race in setting these two fields |
|
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1285 // in methodOop as seen in bugid 4947125. |
|
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1286 // If the vep() points to the zombie nmethod, the memory for the nmethod |
|
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1287 // could be flushed and the compiler and vtable stubs could still call |
|
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1288 // through it. |
|
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1289 if (method() != NULL && (method()->code() == this || |
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1290 method()->from_compiled_entry() == verified_entry_point())) { |
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1291 HandleMark hm; |
|
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1292 method()->clear_code(); |
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1293 } |
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1294 |
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1295 if (state == not_entrant) { |
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1296 mark_as_seen_on_stack(); |
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1297 } |
|
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1298 |
| 0 | 1299 } // leave critical region under Patching_lock |
| 1300 | |
|
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1301 // When the nmethod becomes zombie it is no longer alive so the |
|
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1302 // dependencies must be flushed. nmethods in the not_entrant |
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1303 // state will be flushed later when the transition to zombie |
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1304 // happens or they get unloaded. |
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1305 if (state == zombie) { |
|
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1306 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event |
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1307 // and it hasn't already been reported for this nmethod then report it now. |
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1308 // (the event may have been reported earilier if the GC marked it for unloading). |
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1309 post_compiled_method_unload(); |
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1310 |
|
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1311 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1312 flush_dependencies(NULL); |
|
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1313 } else { |
|
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1314 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1315 } |
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1316 |
| 0 | 1317 if (TraceCreateZombies) { |
| 1318 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
| 1319 } | |
| 1320 | |
| 1321 // Make sweeper aware that there is a zombie method that needs to be removed | |
| 1322 NMethodSweeper::notify(this); | |
| 1323 | |
|
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1324 return true; |
| 0 | 1325 } |
| 1326 | |
| 1327 void nmethod::flush() { | |
| 1328 // Note that there are no valid oops in the nmethod anymore. | |
| 1329 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
| 1330 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
| 1331 | |
| 1332 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
|
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1333 assert_locked_or_safepoint(CodeCache_lock); |
| 0 | 1334 |
| 1335 // completely deallocate this method | |
| 1336 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
| 1337 if (PrintMethodFlushing) { | |
| 1202 | 1338 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
| 1339 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
| 0 | 1340 } |
| 1341 | |
| 1342 // We need to deallocate any ExceptionCache data. | |
| 1343 // Note that we do not need to grab the nmethod lock for this, it | |
| 1344 // better be thread safe if we're disposing of it! | |
| 1345 ExceptionCache* ec = exception_cache(); | |
| 1346 set_exception_cache(NULL); | |
| 1347 while(ec != NULL) { | |
| 1348 ExceptionCache* next = ec->next(); | |
| 1349 delete ec; | |
| 1350 ec = next; | |
| 1351 } | |
| 1352 | |
|
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1353 if (on_scavenge_root_list()) { |
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1354 CodeCache::drop_scavenge_root_nmethod(this); |
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1355 } |
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1356 |
| 1202 | 1357 if (is_speculatively_disconnected()) { |
| 1358 CodeCache::remove_saved_code(this); | |
| 1359 } | |
| 1360 | |
| 1692 | 1361 #ifdef SHARK |
| 1362 ((SharkCompiler *) compiler())->free_compiled_method(instructions_begin()); | |
| 1363 #endif // SHARK | |
| 1364 | |
| 0 | 1365 ((CodeBlob*)(this))->flush(); |
| 1366 | |
| 1367 CodeCache::free(this); | |
| 1368 } | |
| 1369 | |
| 1370 | |
| 1371 // | |
| 1372 // Notify all classes this nmethod is dependent on that it is no | |
| 1373 // longer dependent. This should only be called in two situations. | |
| 1374 // First, when a nmethod transitions to a zombie all dependents need | |
| 1375 // to be clear. Since zombification happens at a safepoint there's no | |
| 1376 // synchronization issues. The second place is a little more tricky. | |
| 1377 // During phase 1 of mark sweep class unloading may happen and as a | |
| 1378 // result some nmethods may get unloaded. In this case the flushing | |
| 1379 // of dependencies must happen during phase 1 since after GC any | |
| 1380 // dependencies in the unloaded nmethod won't be updated, so | |
| 1381 // traversing the dependency information in unsafe. In that case this | |
| 1382 // function is called with a non-NULL argument and this function only | |
| 1383 // notifies instanceKlasses that are reachable | |
| 1384 | |
| 1385 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
|
1538
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|
1386 assert_locked_or_safepoint(CodeCache_lock); |
| 0 | 1387 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
| 1388 "is_alive is non-NULL if and only if we are called during GC"); | |
| 1389 if (!has_flushed_dependencies()) { | |
| 1390 set_has_flushed_dependencies(); | |
| 1391 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1392 klassOop klass = deps.context_type(); | |
| 1393 if (klass == NULL) continue; // ignore things like evol_method | |
| 1394 | |
| 1395 // During GC the is_alive closure is non-NULL, and is used to | |
| 1396 // determine liveness of dependees that need to be updated. | |
| 1397 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
| 1398 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
| 1399 } | |
| 1400 } | |
| 1401 } | |
| 1402 } | |
| 1403 | |
| 1404 | |
| 1405 // If this oop is not live, the nmethod can be unloaded. | |
| 1406 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
| 1407 OopClosure* keep_alive, | |
| 1408 oop* root, bool unloading_occurred) { | |
| 1409 assert(root != NULL, "just checking"); | |
| 1410 oop obj = *root; | |
| 1411 if (obj == NULL || is_alive->do_object_b(obj)) { | |
| 1412 return false; | |
| 1413 } | |
| 1414 if (obj->is_compiledICHolder()) { | |
| 1415 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
| 1416 if (is_alive->do_object_b( | |
| 1417 cichk_oop->holder_method()->method_holder()) && | |
| 1418 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1419 // The oop should be kept alive | |
| 1420 keep_alive->do_oop(root); | |
| 1421 return false; | |
| 1422 } | |
| 1423 } | |
|
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|
1424 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
|
148e5441d916
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|
1425 // simply because one of its constant oops has gone dead. |
|
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|
1426 // No actual classes need to be unloaded in order for this to occur. |
|
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|
1427 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
| 0 | 1428 make_unloaded(is_alive, obj); |
| 1429 return true; | |
| 1430 } | |
| 1431 | |
| 1432 // ------------------------------------------------------------------ | |
| 1433 // post_compiled_method_load_event | |
| 1434 // new method for install_code() path | |
| 1435 // Transfer information from compilation to jvmti | |
| 1436 void nmethod::post_compiled_method_load_event() { | |
| 1437 | |
| 1438 methodOop moop = method(); | |
| 1439 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
| 1440 moop->klass_name()->bytes(), | |
| 1441 moop->klass_name()->utf8_length(), | |
| 1442 moop->name()->bytes(), | |
| 1443 moop->name()->utf8_length(), | |
| 1444 moop->signature()->bytes(), | |
| 1445 moop->signature()->utf8_length(), | |
| 1446 code_begin(), code_size()); | |
| 1447 | |
|
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|
1448 if (JvmtiExport::should_post_compiled_method_load() || |
|
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|
1449 JvmtiExport::should_post_compiled_method_unload()) { |
|
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|
1450 get_and_cache_jmethod_id(); |
|
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|
1451 } |
|
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|
1452 |
| 0 | 1453 if (JvmtiExport::should_post_compiled_method_load()) { |
| 1454 JvmtiExport::post_compiled_method_load(this); | |
| 1455 } | |
| 1456 } | |
| 1457 | |
|
1616
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|
1458 jmethodID nmethod::get_and_cache_jmethod_id() { |
|
38e8278318ca
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|
1459 if (_jmethod_id == NULL) { |
|
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changeset
|
1460 // Cache the jmethod_id since it can no longer be looked up once the |
|
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|
1461 // method itself has been marked for unloading. |
|
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|
1462 _jmethod_id = method()->jmethod_id(); |
|
38e8278318ca
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|
1463 } |
|
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|
1464 return _jmethod_id; |
|
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|
1465 } |
|
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|
1466 |
| 0 | 1467 void nmethod::post_compiled_method_unload() { |
|
1577
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|
1468 if (unload_reported()) { |
|
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|
1469 // During unloading we transition to unloaded and then to zombie |
|
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|
1470 // and the unloading is reported during the first transition. |
|
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|
1471 return; |
|
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|
1472 } |
|
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|
1473 |
| 0 | 1474 assert(_method != NULL && !is_unloaded(), "just checking"); |
| 1475 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
| 1476 | |
| 1477 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
|
1616
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|
1478 // post the event. Sometime later this nmethod will be made a zombie |
|
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|
1479 // by the sweeper but the methodOop will not be valid at that point. |
|
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|
1480 // If the _jmethod_id is null then no load event was ever requested |
|
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|
1481 // so don't bother posting the unload. The main reason for this is |
|
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changeset
|
1482 // that the jmethodID is a weak reference to the methodOop so if |
|
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|
1483 // it's being unloaded there's no way to look it up since the weak |
|
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|
1484 // ref will have been cleared. |
|
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changeset
|
1485 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
| 0 | 1486 assert(!unload_reported(), "already unloaded"); |
| 1487 HandleMark hm; | |
|
1616
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|
1488 JvmtiExport::post_compiled_method_unload(_jmethod_id, code_begin()); |
| 0 | 1489 } |
| 1490 | |
| 1491 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
| 1492 // any time. As the nmethod is being unloaded now we mark it has | |
| 1493 // having the unload event reported - this will ensure that we don't | |
| 1494 // attempt to report the event in the unlikely scenario where the | |
| 1495 // event is enabled at the time the nmethod is made a zombie. | |
| 1496 set_unload_reported(); | |
| 1497 } | |
| 1498 | |
| 1499 // This is called at the end of the strong tracing/marking phase of a | |
| 1500 // GC to unload an nmethod if it contains otherwise unreachable | |
| 1501 // oops. | |
| 1502 | |
| 1503 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
| 1504 OopClosure* keep_alive, bool unloading_occurred) { | |
| 1505 // Make sure the oop's ready to receive visitors | |
| 1506 assert(!is_zombie() && !is_unloaded(), | |
| 1507 "should not call follow on zombie or unloaded nmethod"); | |
| 1508 | |
| 1509 // If the method is not entrant then a JMP is plastered over the | |
| 1510 // first few bytes. If an oop in the old code was there, that oop | |
| 1511 // should not get GC'd. Skip the first few bytes of oops on | |
| 1512 // not-entrant methods. | |
| 1513 address low_boundary = verified_entry_point(); | |
| 1514 if (is_not_entrant()) { | |
| 1515 low_boundary += NativeJump::instruction_size; | |
| 1516 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1517 // (See comment above.) | |
| 1518 } | |
| 1519 | |
| 1520 // The RedefineClasses() API can cause the class unloading invariant | |
| 1521 // to no longer be true. See jvmtiExport.hpp for details. | |
| 1522 // Also, leave a debugging breadcrumb in local flag. | |
| 1523 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
| 1524 if (a_class_was_redefined) { | |
| 1525 // This set of the unloading_occurred flag is done before the | |
| 1526 // call to post_compiled_method_unload() so that the unloading | |
| 1527 // of this nmethod is reported. | |
| 1528 unloading_occurred = true; | |
| 1529 } | |
| 1530 | |
| 1531 // Follow methodOop | |
| 1532 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
| 1533 return; | |
| 1534 } | |
| 1535 | |
| 1536 // Exception cache | |
| 1537 ExceptionCache* ec = exception_cache(); | |
| 1538 while (ec != NULL) { | |
| 1539 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
| 1540 oop ex = *ex_addr; | |
| 1541 ExceptionCache* next_ec = ec->next(); | |
| 1542 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
| 1543 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
| 1544 remove_from_exception_cache(ec); | |
| 1545 } | |
| 1546 ec = next_ec; | |
| 1547 } | |
| 1548 | |
| 1549 // If class unloading occurred we first iterate over all inline caches and | |
| 1550 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
| 1551 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
| 1552 // iteration below. | |
| 1553 if (unloading_occurred) { | |
| 1554 RelocIterator iter(this, low_boundary); | |
| 1555 while(iter.next()) { | |
| 1556 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1557 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1558 oop ic_oop = ic->cached_oop(); | |
| 1559 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
| 1560 // The only exception is compiledICHolder oops which may | |
| 1561 // yet be marked below. (We check this further below). | |
| 1562 if (ic_oop->is_compiledICHolder()) { | |
| 1563 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
| 1564 if (is_alive->do_object_b( | |
| 1565 cichk_oop->holder_method()->method_holder()) && | |
| 1566 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1567 continue; | |
| 1568 } | |
| 1569 } | |
| 1570 ic->set_to_clean(); | |
|
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6888953: some calls to function-like macros are missing semicolons
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diff
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|
1571 assert(ic->cached_oop() == NULL, |
|
cff162798819
6888953: some calls to function-like macros are missing semicolons
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|
1572 "cached oop in IC should be cleared"); |
| 0 | 1573 } |
| 1574 } | |
| 1575 } | |
| 1576 } | |
| 1577 | |
| 1578 // Compiled code | |
| 1579 RelocIterator iter(this, low_boundary); | |
| 1580 while (iter.next()) { | |
| 1581 if (iter.type() == relocInfo::oop_type) { | |
| 1582 oop_Relocation* r = iter.oop_reloc(); | |
| 1583 // In this loop, we must only traverse those oops directly embedded in | |
| 1584 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 1585 assert(1 == (r->oop_is_immediate()) + | |
| 1586 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1587 "oop must be found in exactly one place"); | |
| 1588 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
| 1589 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
| 1590 return; | |
| 1591 } | |
| 1592 } | |
| 1593 } | |
| 1594 } | |
| 1595 | |
| 1596 | |
| 1597 // Scopes | |
| 1598 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
| 1599 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1600 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
| 1601 return; | |
| 1602 } | |
| 1603 } | |
| 1604 | |
| 1605 #ifndef PRODUCT | |
| 1606 // This nmethod was not unloaded; check below that all CompiledICs | |
| 1607 // refer to marked oops. | |
| 1608 { | |
| 1609 RelocIterator iter(this, low_boundary); | |
| 1610 while (iter.next()) { | |
| 1611 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1612 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1613 oop ic_oop = ic->cached_oop(); | |
| 1614 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
| 1615 "Found unmarked ic_oop in reachable nmethod"); | |
| 1616 } | |
| 1617 } | |
| 1618 } | |
| 1619 #endif // !PRODUCT | |
| 1620 } | |
| 1621 | |
| 941 | 1622 // This method is called twice during GC -- once while |
| 1623 // tracing the "active" nmethods on thread stacks during | |
| 1624 // the (strong) marking phase, and then again when walking | |
| 1625 // the code cache contents during the weak roots processing | |
| 1626 // phase. The two uses are distinguished by means of the | |
|
994
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6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
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|
1627 // 'do_strong_roots_only' flag, which is true in the first |
| 941 | 1628 // case. We want to walk the weak roots in the nmethod |
| 1629 // only in the second case. The weak roots in the nmethod | |
| 1630 // are the oops in the ExceptionCache and the InlineCache | |
| 1631 // oops. | |
|
994
753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
jrose
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993
diff
changeset
|
1632 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
| 0 | 1633 // make sure the oops ready to receive visitors |
| 1634 assert(!is_zombie() && !is_unloaded(), | |
| 1635 "should not call follow on zombie or unloaded nmethod"); | |
| 1636 | |
| 1637 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1638 // first few bytes. If an oop in the old code was there, that oop | |
| 1639 // should not get GC'd. Skip the first few bytes of oops on | |
| 1640 // not-entrant methods. | |
| 1641 address low_boundary = verified_entry_point(); | |
| 1642 if (is_not_entrant()) { | |
| 1643 low_boundary += NativeJump::instruction_size; | |
| 1644 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1645 // (See comment above.) | |
| 1646 } | |
| 1647 | |
| 1648 // Compiled code | |
| 1649 f->do_oop((oop*) &_method); | |
|
994
753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
jrose
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993
diff
changeset
|
1650 if (!do_strong_roots_only) { |
| 941 | 1651 // weak roots processing phase -- update ExceptionCache oops |
| 1652 ExceptionCache* ec = exception_cache(); | |
| 1653 while(ec != NULL) { | |
| 1654 f->do_oop((oop*)ec->exception_type_addr()); | |
| 1655 ec = ec->next(); | |
| 1656 } | |
| 1657 } // Else strong roots phase -- skip oops in ExceptionCache | |
| 0 | 1658 |
| 1659 RelocIterator iter(this, low_boundary); | |
| 941 | 1660 |
| 0 | 1661 while (iter.next()) { |
| 1662 if (iter.type() == relocInfo::oop_type ) { | |
| 1663 oop_Relocation* r = iter.oop_reloc(); | |
| 1664 // In this loop, we must only follow those oops directly embedded in | |
| 1665 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 941 | 1666 assert(1 == (r->oop_is_immediate()) + |
| 1667 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1668 "oop must be found in exactly one place"); | |
| 0 | 1669 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
| 1670 f->do_oop(r->oop_addr()); | |
| 1671 } | |
| 1672 } | |
| 1673 } | |
| 1674 | |
| 1675 // Scopes | |
|
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6863023: need non-perm oops in code cache for JSR 292
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changeset
|
1676 // This includes oop constants not inlined in the code stream. |
| 0 | 1677 for (oop* p = oops_begin(); p < oops_end(); p++) { |
| 1678 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1679 f->do_oop(p); | |
| 1680 } | |
| 1681 } | |
| 1682 | |
|
989
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6863023: need non-perm oops in code cache for JSR 292
jrose
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931
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changeset
|
1683 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
|
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6863023: need non-perm oops in code cache for JSR 292
jrose
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|
1684 |
|
148e5441d916
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|
1685 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
|
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6863023: need non-perm oops in code cache for JSR 292
jrose
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931
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|
1686 |
|
148e5441d916
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changeset
|
1687 // An nmethod is "marked" if its _mark_link is set non-null. |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
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|
1688 // Even if it is the end of the linked list, it will have a non-null link value, |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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|
1689 // as long as it is on the list. |
|
148e5441d916
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jrose
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changeset
|
1690 // This code must be MP safe, because it is used from parallel GC passes. |
|
148e5441d916
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changeset
|
1691 bool nmethod::test_set_oops_do_mark() { |
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1692 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1693 nmethod* observed_mark_link = _oops_do_mark_link; |
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1694 if (observed_mark_link == NULL) { |
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1695 // Claim this nmethod for this thread to mark. |
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1696 observed_mark_link = (nmethod*) |
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1697 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1698 if (observed_mark_link == NULL) { |
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1699 |
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1700 // Atomically append this nmethod (now claimed) to the head of the list: |
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1701 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1702 for (;;) { |
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1703 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1704 _oops_do_mark_link = required_mark_nmethods; |
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1705 observed_mark_nmethods = (nmethod*) |
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1706 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1707 if (observed_mark_nmethods == required_mark_nmethods) |
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1708 break; |
|
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1709 } |
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1710 // Mark was clear when we first saw this guy. |
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1711 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
|
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1712 return false; |
|
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1713 } |
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1714 } |
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1715 // On fall through, another racing thread marked this nmethod before we did. |
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1716 return true; |
|
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1717 } |
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1718 |
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1719 void nmethod::oops_do_marking_prologue() { |
|
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1720 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
|
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1721 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
|
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1722 // We use cmpxchg_ptr instead of regular assignment here because the user |
|
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1723 // may fork a bunch of threads, and we need them all to see the same state. |
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1724 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1725 guarantee(observed == NULL, "no races in this sequential code"); |
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1726 } |
|
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1727 |
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1728 void nmethod::oops_do_marking_epilogue() { |
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1729 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
|
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1730 nmethod* cur = _oops_do_mark_nmethods; |
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1731 while (cur != NMETHOD_SENTINEL) { |
|
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1732 assert(cur != NULL, "not NULL-terminated"); |
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1733 nmethod* next = cur->_oops_do_mark_link; |
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1734 cur->_oops_do_mark_link = NULL; |
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1735 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1736 cur = next; |
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1737 } |
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1738 void* required = _oops_do_mark_nmethods; |
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1739 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1740 guarantee(observed == required, "no races in this sequential code"); |
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1741 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1742 } |
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1743 |
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1744 class DetectScavengeRoot: public OopClosure { |
|
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1745 bool _detected_scavenge_root; |
|
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1746 public: |
|
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1747 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1748 { NOT_PRODUCT(_print_nm = NULL); } |
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1749 bool detected_scavenge_root() { return _detected_scavenge_root; } |
|
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1750 virtual void do_oop(oop* p) { |
|
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1751 if ((*p) != NULL && (*p)->is_scavengable()) { |
|
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1752 NOT_PRODUCT(maybe_print(p)); |
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1753 _detected_scavenge_root = true; |
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1754 } |
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1755 } |
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1756 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
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1757 |
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1758 #ifndef PRODUCT |
|
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1759 nmethod* _print_nm; |
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1760 void maybe_print(oop* p) { |
|
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1761 if (_print_nm == NULL) return; |
|
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1762 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
|
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1763 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
|
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1764 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
|
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1765 (intptr_t)(*p), (intptr_t)p); |
|
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1766 (*p)->print(); |
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1767 } |
|
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1768 #endif //PRODUCT |
|
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1769 }; |
|
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1770 |
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1771 bool nmethod::detect_scavenge_root_oops() { |
|
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1772 DetectScavengeRoot detect_scavenge_root; |
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1773 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1774 oops_do(&detect_scavenge_root); |
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1775 return detect_scavenge_root.detected_scavenge_root(); |
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1776 } |
|
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1777 |
| 0 | 1778 // Method that knows how to preserve outgoing arguments at call. This method must be |
| 1779 // called with a frame corresponding to a Java invoke | |
| 1780 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
| 1692 | 1781 #ifndef SHARK |
| 0 | 1782 if (!method()->is_native()) { |
| 1783 SimpleScopeDesc ssd(this, fr.pc()); | |
| 1784 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); | |
|
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1785 bool has_receiver = call->has_receiver(); |
| 0 | 1786 symbolOop signature = call->signature(); |
|
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1787 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
| 0 | 1788 } |
| 1692 | 1789 #endif // !SHARK |
| 0 | 1790 } |
| 1791 | |
| 1792 | |
| 1793 oop nmethod::embeddedOop_at(u_char* p) { | |
| 1794 RelocIterator iter(this, p, p + oopSize); | |
| 1795 while (iter.next()) | |
| 1796 if (iter.type() == relocInfo::oop_type) { | |
| 1797 return iter.oop_reloc()->oop_value(); | |
| 1798 } | |
| 1799 return NULL; | |
| 1800 } | |
| 1801 | |
| 1802 | |
| 1803 inline bool includes(void* p, void* from, void* to) { | |
| 1804 return from <= p && p < to; | |
| 1805 } | |
| 1806 | |
| 1807 | |
| 1808 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
| 1809 assert(count >= 2, "must be sentinel values, at least"); | |
| 1810 | |
| 1811 #ifdef ASSERT | |
| 1812 // must be sorted and unique; we do a binary search in find_pc_desc() | |
| 1813 int prev_offset = pcs[0].pc_offset(); | |
| 1814 assert(prev_offset == PcDesc::lower_offset_limit, | |
| 1815 "must start with a sentinel"); | |
| 1816 for (int i = 1; i < count; i++) { | |
| 1817 int this_offset = pcs[i].pc_offset(); | |
| 1818 assert(this_offset > prev_offset, "offsets must be sorted"); | |
| 1819 prev_offset = this_offset; | |
| 1820 } | |
| 1821 assert(prev_offset == PcDesc::upper_offset_limit, | |
| 1822 "must end with a sentinel"); | |
| 1823 #endif //ASSERT | |
| 1824 | |
|
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1825 // Search for MethodHandle invokes and tag the nmethod. |
|
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1826 for (int i = 0; i < count; i++) { |
|
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1827 if (pcs[i].is_method_handle_invoke()) { |
|
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1828 set_has_method_handle_invokes(true); |
|
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1829 break; |
|
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1830 } |
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1831 } |
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1832 |
| 0 | 1833 int size = count * sizeof(PcDesc); |
| 1834 assert(scopes_pcs_size() >= size, "oob"); | |
| 1835 memcpy(scopes_pcs_begin(), pcs, size); | |
| 1836 | |
| 1837 // Adjust the final sentinel downward. | |
| 1838 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
| 1839 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
| 1840 last_pc->set_pc_offset(instructions_size() + 1); | |
| 1841 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { | |
| 1842 // Fill any rounding gaps with copies of the last record. | |
| 1843 last_pc[1] = last_pc[0]; | |
| 1844 } | |
| 1845 // The following assert could fail if sizeof(PcDesc) is not | |
| 1846 // an integral multiple of oopSize (the rounding term). | |
| 1847 // If it fails, change the logic to always allocate a multiple | |
| 1848 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
| 1849 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
| 1850 } | |
| 1851 | |
| 1852 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
| 1853 assert(scopes_data_size() >= size, "oob"); | |
| 1854 memcpy(scopes_data_begin(), buffer, size); | |
| 1855 } | |
| 1856 | |
| 1857 | |
| 1858 #ifdef ASSERT | |
| 1859 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
| 1860 PcDesc* lower = nm->scopes_pcs_begin(); | |
| 1861 PcDesc* upper = nm->scopes_pcs_end(); | |
| 1862 lower += 1; // exclude initial sentinel | |
| 1863 PcDesc* res = NULL; | |
| 1864 for (PcDesc* p = lower; p < upper; p++) { | |
| 1865 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
| 1866 if (match_desc(p, pc_offset, approximate)) { | |
| 1867 if (res == NULL) | |
| 1868 res = p; | |
| 1869 else | |
| 1870 res = (PcDesc*) badAddress; | |
| 1871 } | |
| 1872 } | |
| 1873 return res; | |
| 1874 } | |
| 1875 #endif | |
| 1876 | |
| 1877 | |
| 1878 // Finds a PcDesc with real-pc equal to "pc" | |
| 1879 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
| 1880 address base_address = instructions_begin(); | |
| 1881 if ((pc < base_address) || | |
| 1882 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
| 1883 return NULL; // PC is wildly out of range | |
| 1884 } | |
| 1885 int pc_offset = (int) (pc - base_address); | |
| 1886 | |
| 1887 // Check the PcDesc cache if it contains the desired PcDesc | |
| 1888 // (This as an almost 100% hit rate.) | |
| 1889 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
| 1890 if (res != NULL) { | |
| 1891 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
| 1892 return res; | |
| 1893 } | |
| 1894 | |
| 1895 // Fallback algorithm: quasi-linear search for the PcDesc | |
| 1896 // Find the last pc_offset less than the given offset. | |
| 1897 // The successor must be the required match, if there is a match at all. | |
| 1898 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
| 1899 PcDesc* lower = scopes_pcs_begin(); | |
| 1900 PcDesc* upper = scopes_pcs_end(); | |
| 1901 upper -= 1; // exclude final sentinel | |
| 1902 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
| 1903 | |
| 1904 #define assert_LU_OK \ | |
| 1905 /* invariant on lower..upper during the following search: */ \ | |
| 1906 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
| 1907 assert(upper->pc_offset() >= pc_offset, "sanity") | |
| 1908 assert_LU_OK; | |
| 1909 | |
| 1910 // Use the last successful return as a split point. | |
| 1911 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
| 1912 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1913 if (mid->pc_offset() < pc_offset) { | |
| 1914 lower = mid; | |
| 1915 } else { | |
| 1916 upper = mid; | |
| 1917 } | |
| 1918 | |
| 1919 // Take giant steps at first (4096, then 256, then 16, then 1) | |
| 1920 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
| 1921 const int RADIX = (1 << LOG2_RADIX); | |
| 1922 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
| 1923 while ((mid = lower + step) < upper) { | |
| 1924 assert_LU_OK; | |
| 1925 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1926 if (mid->pc_offset() < pc_offset) { | |
| 1927 lower = mid; | |
| 1928 } else { | |
| 1929 upper = mid; | |
| 1930 break; | |
| 1931 } | |
| 1932 } | |
| 1933 assert_LU_OK; | |
| 1934 } | |
| 1935 | |
| 1936 // Sneak up on the value with a linear search of length ~16. | |
| 1937 while (true) { | |
| 1938 assert_LU_OK; | |
| 1939 mid = lower + 1; | |
| 1940 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 1941 if (mid->pc_offset() < pc_offset) { | |
| 1942 lower = mid; | |
| 1943 } else { | |
| 1944 upper = mid; | |
| 1945 break; | |
| 1946 } | |
| 1947 } | |
| 1948 #undef assert_LU_OK | |
| 1949 | |
| 1950 if (match_desc(upper, pc_offset, approximate)) { | |
| 1951 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
| 1952 _pc_desc_cache.add_pc_desc(upper); | |
| 1953 return upper; | |
| 1954 } else { | |
| 1955 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
| 1956 return NULL; | |
| 1957 } | |
| 1958 } | |
| 1959 | |
| 1960 | |
| 1961 bool nmethod::check_all_dependencies() { | |
| 1962 bool found_check = false; | |
| 1963 // wholesale check of all dependencies | |
| 1964 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1965 if (deps.check_dependency() != NULL) { | |
| 1966 found_check = true; | |
| 1967 NOT_DEBUG(break); | |
| 1968 } | |
| 1969 } | |
| 1970 return found_check; // tell caller if we found anything | |
| 1971 } | |
| 1972 | |
| 1973 bool nmethod::check_dependency_on(DepChange& changes) { | |
| 1974 // What has happened: | |
| 1975 // 1) a new class dependee has been added | |
| 1976 // 2) dependee and all its super classes have been marked | |
| 1977 bool found_check = false; // set true if we are upset | |
| 1978 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1979 // Evaluate only relevant dependencies. | |
| 1980 if (deps.spot_check_dependency_at(changes) != NULL) { | |
| 1981 found_check = true; | |
| 1982 NOT_DEBUG(break); | |
| 1983 } | |
| 1984 } | |
| 1985 return found_check; | |
| 1986 } | |
| 1987 | |
| 1988 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
| 1989 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
| 1990 objArrayOop dependee_methods = dependee_ik->methods(); | |
| 1991 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1992 if (deps.type() == Dependencies::evol_method) { | |
| 1993 methodOop method = deps.method_argument(0); | |
| 1994 for (int j = 0; j < dependee_methods->length(); j++) { | |
| 1995 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
| 1996 // RC_TRACE macro has an embedded ResourceMark | |
| 1997 RC_TRACE(0x01000000, | |
| 1998 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
| 1999 _method->method_holder()->klass_part()->external_name(), | |
| 2000 _method->name()->as_C_string(), | |
| 2001 _method->signature()->as_C_string(), compile_id(), | |
| 2002 method->method_holder()->klass_part()->external_name(), | |
| 2003 method->name()->as_C_string(), | |
| 2004 method->signature()->as_C_string())); | |
| 2005 if (TraceDependencies || LogCompilation) | |
| 2006 deps.log_dependency(dependee); | |
| 2007 return true; | |
| 2008 } | |
| 2009 } | |
| 2010 } | |
| 2011 } | |
| 2012 return false; | |
| 2013 } | |
| 2014 | |
| 2015 // Called from mark_for_deoptimization, when dependee is invalidated. | |
| 2016 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
| 2017 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2018 if (deps.type() != Dependencies::evol_method) | |
| 2019 continue; | |
| 2020 methodOop method = deps.method_argument(0); | |
| 2021 if (method == dependee) return true; | |
| 2022 } | |
| 2023 return false; | |
| 2024 } | |
| 2025 | |
| 2026 | |
| 2027 bool nmethod::is_patchable_at(address instr_addr) { | |
| 2028 assert (code_contains(instr_addr), "wrong nmethod used"); | |
| 2029 if (is_zombie()) { | |
| 2030 // a zombie may never be patched | |
| 2031 return false; | |
| 2032 } | |
| 2033 return true; | |
| 2034 } | |
| 2035 | |
| 2036 | |
| 2037 address nmethod::continuation_for_implicit_exception(address pc) { | |
| 2038 // Exception happened outside inline-cache check code => we are inside | |
| 2039 // an active nmethod => use cpc to determine a return address | |
| 2040 int exception_offset = pc - instructions_begin(); | |
| 2041 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); | |
| 2042 #ifdef ASSERT | |
| 2043 if (cont_offset == 0) { | |
| 2044 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
| 2045 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
| 2046 HandleMark hm(thread); | |
| 2047 ResourceMark rm(thread); | |
| 2048 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2049 assert(cb != NULL && cb == this, ""); | |
| 2050 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
| 2051 print(); | |
| 2052 method()->print_codes(); | |
| 2053 print_code(); | |
| 2054 print_pcs(); | |
| 2055 } | |
| 2056 #endif | |
| 1250 | 2057 if (cont_offset == 0) { |
| 2058 // Let the normal error handling report the exception | |
| 2059 return NULL; | |
| 2060 } | |
| 0 | 2061 return instructions_begin() + cont_offset; |
| 2062 } | |
| 2063 | |
| 2064 | |
| 2065 | |
| 2066 void nmethod_init() { | |
| 2067 // make sure you didn't forget to adjust the filler fields | |
| 2068 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
| 2069 } | |
| 2070 | |
| 2071 | |
| 2072 //------------------------------------------------------------------------------------------- | |
| 2073 | |
| 2074 | |
| 2075 // QQQ might we make this work from a frame?? | |
| 2076 nmethodLocker::nmethodLocker(address pc) { | |
| 2077 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2078 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
| 2079 _nm = (nmethod*)cb; | |
| 2080 lock_nmethod(_nm); | |
| 2081 } | |
| 2082 | |
| 2083 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
| 2084 if (nm == NULL) return; | |
| 2085 Atomic::inc(&nm->_lock_count); | |
| 2086 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
| 2087 } | |
| 2088 | |
| 2089 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
| 2090 if (nm == NULL) return; | |
| 2091 Atomic::dec(&nm->_lock_count); | |
| 2092 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
| 2093 } | |
| 2094 | |
| 1204 | 2095 |
| 2096 // ----------------------------------------------------------------------------- | |
| 2097 // nmethod::get_deopt_original_pc | |
| 2098 // | |
| 2099 // Return the original PC for the given PC if: | |
| 2100 // (a) the given PC belongs to a nmethod and | |
| 2101 // (b) it is a deopt PC | |
| 2102 address nmethod::get_deopt_original_pc(const frame* fr) { | |
| 2103 if (fr->cb() == NULL) return NULL; | |
| 2104 | |
| 2105 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
| 2106 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
| 2107 return nm->get_original_pc(fr); | |
| 2108 | |
| 2109 return NULL; | |
| 0 | 2110 } |
| 2111 | |
| 2112 | |
| 2113 // ----------------------------------------------------------------------------- | |
|
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2114 // MethodHandle |
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2115 |
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2116 bool nmethod::is_method_handle_return(address return_pc) { |
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2117 if (!has_method_handle_invokes()) return false; |
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2118 PcDesc* pd = pc_desc_at(return_pc); |
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2119 if (pd == NULL) |
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2120 return false; |
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2121 return pd->is_method_handle_invoke(); |
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2122 } |
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2123 |
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2124 |
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2125 // ----------------------------------------------------------------------------- |
| 0 | 2126 // Verification |
| 2127 | |
|
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2128 class VerifyOopsClosure: public OopClosure { |
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2129 nmethod* _nm; |
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2130 bool _ok; |
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2131 public: |
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2132 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2133 bool ok() { return _ok; } |
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2134 virtual void do_oop(oop* p) { |
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2135 if ((*p) == NULL || (*p)->is_oop()) return; |
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2136 if (_ok) { |
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2137 _nm->print_nmethod(true); |
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2138 _ok = false; |
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2139 } |
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2140 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2141 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2142 } |
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2143 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2144 }; |
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2145 |
| 0 | 2146 void nmethod::verify() { |
| 2147 | |
| 2148 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
| 2149 // seems odd. | |
| 2150 | |
| 2151 if( is_zombie() || is_not_entrant() ) | |
| 2152 return; | |
| 2153 | |
| 2154 // Make sure all the entry points are correctly aligned for patching. | |
| 2155 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
| 2156 | |
| 2157 assert(method()->is_oop(), "must be valid"); | |
| 2158 | |
| 2159 ResourceMark rm; | |
| 2160 | |
| 2161 if (!CodeCache::contains(this)) { | |
|
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2162 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
| 0 | 2163 } |
| 2164 | |
| 2165 if(is_native_method() ) | |
| 2166 return; | |
| 2167 | |
| 2168 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
| 2169 if (nm != this) { | |
|
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2170 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2171 this)); |
| 0 | 2172 } |
| 2173 | |
| 2174 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2175 if (! p->verify(this)) { | |
| 2176 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
| 2177 } | |
| 2178 } | |
| 2179 | |
|
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2180 VerifyOopsClosure voc(this); |
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2181 oops_do(&voc); |
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2182 assert(voc.ok(), "embedded oops must be OK"); |
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2183 verify_scavenge_root_oops(); |
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2184 |
| 0 | 2185 verify_scopes(); |
| 2186 } | |
| 2187 | |
| 2188 | |
| 2189 void nmethod::verify_interrupt_point(address call_site) { | |
| 2190 // This code does not work in release mode since | |
| 2191 // owns_lock only is available in debug mode. | |
| 2192 CompiledIC* ic = NULL; | |
| 2193 Thread *cur = Thread::current(); | |
| 2194 if (CompiledIC_lock->owner() == cur || | |
| 2195 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
| 2196 SafepointSynchronize::is_at_safepoint())) { | |
| 2197 ic = CompiledIC_at(call_site); | |
| 2198 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 2199 } else { | |
| 2200 MutexLocker ml_verify (CompiledIC_lock); | |
| 2201 ic = CompiledIC_at(call_site); | |
| 2202 } | |
| 2203 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
| 2204 assert(pd != NULL, "PcDesc must exist"); | |
| 2205 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
|
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2206 pd->obj_decode_offset(), pd->should_reexecute(), |
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2207 pd->return_oop()); |
| 0 | 2208 !sd->is_top(); sd = sd->sender()) { |
| 2209 sd->verify(); | |
| 2210 } | |
| 2211 } | |
| 2212 | |
| 2213 void nmethod::verify_scopes() { | |
| 2214 if( !method() ) return; // Runtime stubs have no scope | |
| 2215 if (method()->is_native()) return; // Ignore stub methods. | |
| 2216 // iterate through all interrupt point | |
| 2217 // and verify the debug information is valid. | |
| 2218 RelocIterator iter((nmethod*)this); | |
| 2219 while (iter.next()) { | |
| 2220 address stub = NULL; | |
| 2221 switch (iter.type()) { | |
| 2222 case relocInfo::virtual_call_type: | |
| 2223 verify_interrupt_point(iter.addr()); | |
| 2224 break; | |
| 2225 case relocInfo::opt_virtual_call_type: | |
| 2226 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
| 2227 verify_interrupt_point(iter.addr()); | |
| 2228 break; | |
| 2229 case relocInfo::static_call_type: | |
| 2230 stub = iter.static_call_reloc()->static_stub(); | |
| 2231 //verify_interrupt_point(iter.addr()); | |
| 2232 break; | |
| 2233 case relocInfo::runtime_call_type: | |
| 2234 address destination = iter.reloc()->value(); | |
| 2235 // Right now there is no way to find out which entries support | |
| 2236 // an interrupt point. It would be nice if we had this | |
| 2237 // information in a table. | |
| 2238 break; | |
| 2239 } | |
| 2240 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
| 2241 } | |
| 2242 } | |
| 2243 | |
| 2244 | |
| 2245 // ----------------------------------------------------------------------------- | |
| 2246 // Non-product code | |
| 2247 #ifndef PRODUCT | |
| 2248 | |
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2249 class DebugScavengeRoot: public OopClosure { |
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2250 nmethod* _nm; |
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|
2251 bool _ok; |
|
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2252 public: |
|
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2253 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
|
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2254 bool ok() { return _ok; } |
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2255 virtual void do_oop(oop* p) { |
|
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2256 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
|
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2257 if (_ok) { |
|
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|
2258 _nm->print_nmethod(true); |
|
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|
2259 _ok = false; |
|
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|
2260 } |
|
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2261 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
|
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2262 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
|
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|
2263 (*p)->print(); |
|
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|
2264 } |
|
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|
2265 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
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|
2266 }; |
| 0 | 2267 |
|
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|
2268 void nmethod::verify_scavenge_root_oops() { |
|
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|
2269 if (!on_scavenge_root_list()) { |
|
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|
2270 // Actually look inside, to verify the claim that it's clean. |
|
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|
2271 DebugScavengeRoot debug_scavenge_root(this); |
|
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|
2272 oops_do(&debug_scavenge_root); |
|
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|
2273 if (!debug_scavenge_root.ok()) |
|
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|
2274 fatal("found an unadvertised bad non-perm oop in the code cache"); |
| 0 | 2275 } |
|
989
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|
2276 assert(scavenge_root_not_marked(), ""); |
| 0 | 2277 } |
| 2278 | |
|
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|
2279 #endif // PRODUCT |
| 0 | 2280 |
| 2281 // Printing operations | |
| 2282 | |
| 2283 void nmethod::print() const { | |
| 2284 ResourceMark rm; | |
| 2285 ttyLocker ttyl; // keep the following output all in one block | |
| 2286 | |
| 2287 tty->print("Compiled "); | |
| 2288 | |
| 2289 if (is_compiled_by_c1()) { | |
| 2290 tty->print("(c1) "); | |
| 2291 } else if (is_compiled_by_c2()) { | |
| 2292 tty->print("(c2) "); | |
| 1692 | 2293 } else if (is_compiled_by_shark()) { |
| 2294 tty->print("(shark) "); | |
| 0 | 2295 } else { |
| 2296 tty->print("(nm) "); | |
| 2297 } | |
| 2298 | |
| 2299 print_on(tty, "nmethod"); | |
| 2300 tty->cr(); | |
| 2301 if (WizardMode) { | |
| 2302 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
| 2303 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
| 2304 tty->print(" { "); | |
| 2305 if (is_in_use()) tty->print("in_use "); | |
| 2306 if (is_not_entrant()) tty->print("not_entrant "); | |
| 2307 if (is_zombie()) tty->print("zombie "); | |
| 2308 if (is_unloaded()) tty->print("unloaded "); | |
|
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|
2309 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
| 0 | 2310 tty->print_cr("}:"); |
| 2311 } | |
| 2312 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2313 (address)this, | |
| 2314 (address)this + size(), | |
| 2315 size()); | |
| 2316 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2317 relocation_begin(), | |
| 2318 relocation_end(), | |
| 2319 relocation_size()); | |
| 2320 if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2321 code_begin(), | |
| 2322 code_end(), | |
| 2323 code_size()); | |
| 2324 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2325 stub_begin(), | |
| 2326 stub_end(), | |
| 2327 stub_size()); | |
| 2328 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2329 consts_begin(), | |
| 2330 consts_end(), | |
| 2331 consts_size()); | |
|
1563
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2332 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
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|
2333 oops_begin(), |
|
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|
2334 oops_end(), |
|
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|
2335 oops_size()); |
| 0 | 2336 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| 2337 scopes_data_begin(), | |
| 2338 scopes_data_end(), | |
| 2339 scopes_data_size()); | |
| 2340 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2341 scopes_pcs_begin(), | |
| 2342 scopes_pcs_end(), | |
| 2343 scopes_pcs_size()); | |
| 2344 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2345 dependencies_begin(), | |
| 2346 dependencies_end(), | |
| 2347 dependencies_size()); | |
| 2348 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2349 handler_table_begin(), | |
| 2350 handler_table_end(), | |
| 2351 handler_table_size()); | |
| 2352 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2353 nul_chk_table_begin(), | |
| 2354 nul_chk_table_end(), | |
| 2355 nul_chk_table_size()); | |
| 2356 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2357 oops_begin(), | |
| 2358 oops_end(), | |
| 2359 oops_size()); | |
| 2360 } | |
| 2361 | |
|
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|
2362 void nmethod::print_code() { |
|
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|
2363 HandleMark hm; |
|
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|
2364 ResourceMark m; |
|
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|
2365 Disassembler::decode(this); |
|
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|
2366 } |
|
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|
2367 |
|
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|
2368 |
|
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|
2369 #ifndef PRODUCT |
| 0 | 2370 |
| 2371 void nmethod::print_scopes() { | |
| 2372 // Find the first pc desc for all scopes in the code and print it. | |
| 2373 ResourceMark rm; | |
| 2374 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2375 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
| 2376 continue; | |
| 2377 | |
| 2378 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
| 2379 sd->print_on(tty, p); | |
| 2380 } | |
| 2381 } | |
| 2382 | |
| 2383 void nmethod::print_dependencies() { | |
| 2384 ResourceMark rm; | |
| 2385 ttyLocker ttyl; // keep the following output all in one block | |
| 2386 tty->print_cr("Dependencies:"); | |
| 2387 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2388 deps.print_dependency(); | |
| 2389 klassOop ctxk = deps.context_type(); | |
| 2390 if (ctxk != NULL) { | |
| 2391 Klass* k = Klass::cast(ctxk); | |
| 2392 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
| 30 | 2393 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
| 0 | 2394 } |
| 2395 } | |
| 2396 deps.log_dependency(); // put it into the xml log also | |
| 2397 } | |
| 2398 } | |
| 2399 | |
| 2400 | |
| 2401 void nmethod::print_relocations() { | |
| 2402 ResourceMark m; // in case methods get printed via the debugger | |
| 2403 tty->print_cr("relocations:"); | |
| 2404 RelocIterator iter(this); | |
| 2405 iter.print(); | |
| 2406 if (UseRelocIndex) { | |
| 2407 jint* index_end = (jint*)relocation_end() - 1; | |
| 2408 jint index_size = *index_end; | |
| 2409 jint* index_start = (jint*)( (address)index_end - index_size ); | |
| 2410 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
| 2411 if (index_size > 0) { | |
| 2412 jint* ip; | |
| 2413 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
| 2414 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
| 2415 ip[0], | |
| 2416 ip[1], | |
| 2417 header_end()+ip[0], | |
| 2418 relocation_begin()-1+ip[1]); | |
| 2419 for (; ip < index_end; ip++) | |
| 2420 tty->print_cr(" (%d ?)", ip[0]); | |
| 2421 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
| 2422 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
| 2423 } | |
| 2424 } | |
| 2425 } | |
| 2426 | |
| 2427 | |
| 2428 void nmethod::print_pcs() { | |
| 2429 ResourceMark m; // in case methods get printed via debugger | |
| 2430 tty->print_cr("pc-bytecode offsets:"); | |
| 2431 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2432 p->print(this); | |
| 2433 } | |
| 2434 } | |
| 2435 | |
|
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|
2436 #endif // PRODUCT |
| 0 | 2437 |
| 2438 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
| 2439 RelocIterator iter(this, begin, end); | |
| 2440 bool have_one = false; | |
| 2441 while (iter.next()) { | |
| 2442 have_one = true; | |
| 2443 switch (iter.type()) { | |
| 2444 case relocInfo::none: return "no_reloc"; | |
| 2445 case relocInfo::oop_type: { | |
| 2446 stringStream st; | |
| 2447 oop_Relocation* r = iter.oop_reloc(); | |
| 2448 oop obj = r->oop_value(); | |
| 2449 st.print("oop("); | |
| 2450 if (obj == NULL) st.print("NULL"); | |
| 2451 else obj->print_value_on(&st); | |
| 2452 st.print(")"); | |
| 2453 return st.as_string(); | |
| 2454 } | |
| 2455 case relocInfo::virtual_call_type: return "virtual_call"; | |
| 2456 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
| 2457 case relocInfo::static_call_type: return "static_call"; | |
| 2458 case relocInfo::static_stub_type: return "static_stub"; | |
| 2459 case relocInfo::runtime_call_type: return "runtime_call"; | |
| 2460 case relocInfo::external_word_type: return "external_word"; | |
| 2461 case relocInfo::internal_word_type: return "internal_word"; | |
| 2462 case relocInfo::section_word_type: return "section_word"; | |
| 2463 case relocInfo::poll_type: return "poll"; | |
| 2464 case relocInfo::poll_return_type: return "poll_return"; | |
| 2465 case relocInfo::type_mask: return "type_bit_mask"; | |
| 2466 } | |
| 2467 } | |
| 2468 return have_one ? "other" : NULL; | |
| 2469 } | |
| 2470 | |
| 2471 // Return a the last scope in (begin..end] | |
| 2472 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
| 2473 PcDesc* p = pc_desc_near(begin+1); | |
| 2474 if (p != NULL && p->real_pc(this) <= end) { | |
| 2475 return new ScopeDesc(this, p->scope_decode_offset(), | |
|
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2476 p->obj_decode_offset(), p->should_reexecute(), |
|
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2477 p->return_oop()); |
| 0 | 2478 } |
| 2479 return NULL; | |
| 2480 } | |
| 2481 | |
|
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|
2482 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
|
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diff
changeset
|
2483 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
|
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|
2484 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
|
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|
2485 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
|
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|
2486 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
| 1204 | 2487 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
|
1691
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|
2488 |
|
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|
2489 if (has_method_handle_invokes()) |
|
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diff
changeset
|
2490 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
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|
2491 |
|
1155
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changeset
|
2492 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
|
1691
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changeset
|
2493 |
|
1155
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changeset
|
2494 if (block_begin == entry_point()) { |
|
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diff
changeset
|
2495 methodHandle m = method(); |
|
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changeset
|
2496 if (m.not_null()) { |
|
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diff
changeset
|
2497 stream->print(" # "); |
|
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|
2498 m->print_value_on(stream); |
|
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diff
changeset
|
2499 stream->cr(); |
|
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|
2500 } |
|
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changeset
|
2501 if (m.not_null() && !is_osr_method()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
2502 ResourceMark rm; |
|
4e6abf09f540
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diff
changeset
|
2503 int sizeargs = m->size_of_parameters(); |
|
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changeset
|
2504 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
|
4e6abf09f540
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diff
changeset
|
2505 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
|
4e6abf09f540
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changeset
|
2506 { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
2507 int sig_index = 0; |
|
4e6abf09f540
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diff
changeset
|
2508 if (!m->is_static()) |
|
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diff
changeset
|
2509 sig_bt[sig_index++] = T_OBJECT; // 'this' |
|
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changeset
|
2510 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
|
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changeset
|
2511 BasicType t = ss.type(); |
|
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changeset
|
2512 sig_bt[sig_index++] = t; |
|
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changeset
|
2513 if (type2size[t] == 2) { |
|
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diff
changeset
|
2514 sig_bt[sig_index++] = T_VOID; |
|
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diff
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|
2515 } else { |
|
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diff
changeset
|
2516 assert(type2size[t] == 1, "size is 1 or 2"); |
|
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changeset
|
2517 } |
|
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changeset
|
2518 } |
|
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changeset
|
2519 assert(sig_index == sizeargs, ""); |
|
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changeset
|
2520 } |
|
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changeset
|
2521 const char* spname = "sp"; // make arch-specific? |
|
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changeset
|
2522 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
|
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changeset
|
2523 int stack_slot_offset = this->frame_size() * wordSize; |
|
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changeset
|
2524 int tab1 = 14, tab2 = 24; |
|
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diff
changeset
|
2525 int sig_index = 0; |
|
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diff
changeset
|
2526 int arg_index = (m->is_static() ? 0 : -1); |
|
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|
2527 bool did_old_sp = false; |
|
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changeset
|
2528 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
|
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diff
changeset
|
2529 bool at_this = (arg_index == -1); |
|
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diff
changeset
|
2530 bool at_old_sp = false; |
|
4e6abf09f540
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diff
changeset
|
2531 BasicType t = (at_this ? T_OBJECT : ss.type()); |
|
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diff
changeset
|
2532 assert(t == sig_bt[sig_index], "sigs in sync"); |
|
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diff
changeset
|
2533 if (at_this) |
|
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diff
changeset
|
2534 stream->print(" # this: "); |
|
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diff
changeset
|
2535 else |
|
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diff
changeset
|
2536 stream->print(" # parm%d: ", arg_index); |
|
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diff
changeset
|
2537 stream->move_to(tab1); |
|
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changeset
|
2538 VMReg fst = regs[sig_index].first(); |
|
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diff
changeset
|
2539 VMReg snd = regs[sig_index].second(); |
|
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diff
changeset
|
2540 if (fst->is_reg()) { |
|
4e6abf09f540
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diff
changeset
|
2541 stream->print("%s", fst->name()); |
|
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diff
changeset
|
2542 if (snd->is_valid()) { |
|
4e6abf09f540
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diff
changeset
|
2543 stream->print(":%s", snd->name()); |
|
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diff
changeset
|
2544 } |
|
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diff
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|
2545 } else if (fst->is_stack()) { |
|
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diff
changeset
|
2546 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
|
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diff
changeset
|
2547 if (offset == stack_slot_offset) at_old_sp = true; |
|
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diff
changeset
|
2548 stream->print("[%s+0x%x]", spname, offset); |
|
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diff
changeset
|
2549 } else { |
|
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diff
changeset
|
2550 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
|
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changeset
|
2551 } |
|
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diff
changeset
|
2552 stream->print(" "); |
|
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diff
changeset
|
2553 stream->move_to(tab2); |
|
4e6abf09f540
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diff
changeset
|
2554 stream->print("= "); |
|
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diff
changeset
|
2555 if (at_this) { |
|
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diff
changeset
|
2556 m->method_holder()->print_value_on(stream); |
|
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diff
changeset
|
2557 } else { |
|
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diff
changeset
|
2558 bool did_name = false; |
|
4e6abf09f540
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diff
changeset
|
2559 if (!at_this && ss.is_object()) { |
|
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diff
changeset
|
2560 symbolOop name = ss.as_symbol_or_null(); |
|
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diff
changeset
|
2561 if (name != NULL) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2562 name->print_value_on(stream); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2563 did_name = true; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2564 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2565 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2566 if (!did_name) |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2567 stream->print("%s", type2name(t)); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2568 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2569 if (at_old_sp) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2570 stream->print(" (%s of caller)", spname); |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2571 did_old_sp = true; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2572 } |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2573 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2574 sig_index += type2size[t]; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2575 arg_index += 1; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2576 if (!at_this) ss.next(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2577 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2578 if (!did_old_sp) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2579 stream->print(" # "); |
|
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2580 stream->move_to(tab1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2581 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2582 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
|
2583 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2584 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2585 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2586 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2587 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2588 |
| 0 | 2589 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
| 2590 // First, find an oopmap in (begin, end]. | |
| 2591 // We use the odd half-closed interval so that oop maps and scope descs | |
| 2592 // which are tied to the byte after a call are printed with the call itself. | |
| 2593 address base = instructions_begin(); | |
| 2594 OopMapSet* oms = oop_maps(); | |
| 2595 if (oms != NULL) { | |
| 2596 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
| 2597 OopMap* om = oms->at(i); | |
| 2598 address pc = base + om->offset(); | |
| 2599 if (pc > begin) { | |
| 2600 if (pc <= end) { | |
|
100
c7c777385a15
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diff
changeset
|
2601 st->move_to(column); |
|
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2602 st->print("; "); |
|
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2603 om->print_on(st); |
| 0 | 2604 } |
| 2605 break; | |
| 2606 } | |
| 2607 } | |
| 2608 } | |
|
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2609 |
|
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6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2610 // Print any debug info present at this pc. |
| 0 | 2611 ScopeDesc* sd = scope_desc_in(begin, end); |
| 2612 if (sd != NULL) { | |
|
100
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diff
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|
2613 st->move_to(column); |
| 0 | 2614 if (sd->bci() == SynchronizationEntryBCI) { |
| 2615 st->print(";*synchronization entry"); | |
| 2616 } else { | |
| 2617 if (sd->method().is_null()) { | |
|
100
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diff
changeset
|
2618 st->print("method is NULL"); |
| 0 | 2619 } else if (sd->method()->is_native()) { |
|
100
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diff
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|
2620 st->print("method is native"); |
| 0 | 2621 } else { |
| 2622 address bcp = sd->method()->bcp_from(sd->bci()); | |
| 2623 Bytecodes::Code bc = Bytecodes::java_code_at(bcp); | |
| 2624 st->print(";*%s", Bytecodes::name(bc)); | |
| 2625 switch (bc) { | |
| 2626 case Bytecodes::_invokevirtual: | |
| 2627 case Bytecodes::_invokespecial: | |
| 2628 case Bytecodes::_invokestatic: | |
| 2629 case Bytecodes::_invokeinterface: | |
| 2630 { | |
| 2631 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); | |
| 2632 st->print(" "); | |
| 2633 if (invoke->name() != NULL) | |
| 2634 invoke->name()->print_symbol_on(st); | |
| 2635 else | |
| 2636 st->print("<UNKNOWN>"); | |
| 2637 break; | |
| 2638 } | |
| 2639 case Bytecodes::_getfield: | |
| 2640 case Bytecodes::_putfield: | |
| 2641 case Bytecodes::_getstatic: | |
| 2642 case Bytecodes::_putstatic: | |
| 2643 { | |
| 1602 | 2644 Bytecode_field* field = Bytecode_field_at(sd->method(), sd->bci()); |
| 0 | 2645 st->print(" "); |
| 1602 | 2646 if (field->name() != NULL) |
| 2647 field->name()->print_symbol_on(st); | |
| 0 | 2648 else |
| 2649 st->print("<UNKNOWN>"); | |
| 2650 } | |
| 2651 } | |
| 2652 } | |
| 2653 } | |
|
100
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diff
changeset
|
2654 |
| 0 | 2655 // Print all scopes |
| 2656 for (;sd != NULL; sd = sd->sender()) { | |
|
100
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diff
changeset
|
2657 st->move_to(column); |
| 0 | 2658 st->print("; -"); |
| 2659 if (sd->method().is_null()) { | |
|
100
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diff
changeset
|
2660 st->print("method is NULL"); |
| 0 | 2661 } else { |
| 2662 sd->method()->print_short_name(st); | |
| 2663 } | |
| 2664 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
| 2665 if (lineno != -1) { | |
| 2666 st->print("@%d (line %d)", sd->bci(), lineno); | |
| 2667 } else { | |
| 2668 st->print("@%d", sd->bci()); | |
| 2669 } | |
| 2670 st->cr(); | |
| 2671 } | |
| 2672 } | |
| 2673 | |
| 2674 // Print relocation information | |
| 2675 const char* str = reloc_string_for(begin, end); | |
| 2676 if (str != NULL) { | |
| 2677 if (sd != NULL) st->cr(); | |
|
100
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diff
changeset
|
2678 st->move_to(column); |
| 0 | 2679 st->print("; {%s}", str); |
| 2680 } | |
| 2681 int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); | |
| 2682 if (cont_offset != 0) { | |
|
100
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diff
changeset
|
2683 st->move_to(column); |
| 0 | 2684 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); |
| 2685 } | |
| 2686 | |
| 2687 } | |
| 2688 | |
|
100
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|
2689 #ifndef PRODUCT |
|
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diff
changeset
|
2690 |
| 0 | 2691 void nmethod::print_value_on(outputStream* st) const { |
| 2692 print_on(st, "nmethod"); | |
| 2693 } | |
| 2694 | |
| 2695 void nmethod::print_calls(outputStream* st) { | |
| 2696 RelocIterator iter(this); | |
| 2697 while (iter.next()) { | |
| 2698 switch (iter.type()) { | |
| 2699 case relocInfo::virtual_call_type: | |
| 2700 case relocInfo::opt_virtual_call_type: { | |
| 2701 VerifyMutexLocker mc(CompiledIC_lock); | |
| 2702 CompiledIC_at(iter.reloc())->print(); | |
| 2703 break; | |
| 2704 } | |
| 2705 case relocInfo::static_call_type: | |
| 2706 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
| 2707 compiledStaticCall_at(iter.reloc())->print(); | |
| 2708 break; | |
| 2709 } | |
| 2710 } | |
| 2711 } | |
| 2712 | |
| 2713 void nmethod::print_handler_table() { | |
| 2714 ExceptionHandlerTable(this).print(); | |
| 2715 } | |
| 2716 | |
| 2717 void nmethod::print_nul_chk_table() { | |
| 2718 ImplicitExceptionTable(this).print(instructions_begin()); | |
| 2719 } | |
| 2720 | |
| 2721 void nmethod::print_statistics() { | |
| 2722 ttyLocker ttyl; | |
| 2723 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
| 2724 nmethod_stats.print_native_nmethod_stats(); | |
| 2725 nmethod_stats.print_nmethod_stats(); | |
| 2726 DebugInformationRecorder::print_statistics(); | |
| 2727 nmethod_stats.print_pc_stats(); | |
| 2728 Dependencies::print_statistics(); | |
| 2729 if (xtty != NULL) xtty->tail("statistics"); | |
| 2730 } | |
| 2731 | |
| 2732 #endif // PRODUCT |