Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 2349:4cd9add59b1e
7024866: # assert(limit == NULL || limit <= nm->code_end()) failed: in bounds
Reviewed-by: kvn, iveresov
| author | never |
|---|---|
| date | Fri, 04 Mar 2011 20:01:48 -0800 |
| parents | 1b4e6a5d98e0 |
| children | 1c0cf339481b |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2142 | 2 * Copyright (c) 1997, 2011, 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 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/codeCache.hpp" | |
| 27 #include "code/compiledIC.hpp" | |
| 28 #include "code/nmethod.hpp" | |
| 29 #include "code/scopeDesc.hpp" | |
| 30 #include "compiler/abstractCompiler.hpp" | |
| 31 #include "compiler/compileLog.hpp" | |
| 32 #include "compiler/compilerOracle.hpp" | |
| 33 #include "compiler/disassembler.hpp" | |
| 34 #include "interpreter/bytecode.hpp" | |
| 35 #include "oops/methodDataOop.hpp" | |
| 36 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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37 #include "prims/jvmtiImpl.hpp" |
| 1972 | 38 #include "runtime/sharedRuntime.hpp" |
| 39 #include "runtime/sweeper.hpp" | |
| 40 #include "utilities/dtrace.hpp" | |
| 41 #include "utilities/events.hpp" | |
| 42 #include "utilities/xmlstream.hpp" | |
| 43 #ifdef SHARK | |
| 44 #include "shark/sharkCompiler.hpp" | |
| 45 #endif | |
| 0 | 46 |
| 47 #ifdef DTRACE_ENABLED | |
| 48 | |
| 49 // Only bother with this argument setup if dtrace is available | |
| 50 | |
| 51 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
| 52 const char*, int, const char*, int, const char*, int, void*, size_t); | |
| 53 | |
| 54 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
| 55 char*, int, char*, int, char*, int); | |
| 56 | |
| 57 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
| 58 { \ | |
| 59 methodOop m = (method); \ | |
| 60 if (m != NULL) { \ | |
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61 Symbol* klass_name = m->klass_name(); \ |
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62 Symbol* name = m->name(); \ |
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63 Symbol* signature = m->signature(); \ |
| 0 | 64 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
| 65 klass_name->bytes(), klass_name->utf8_length(), \ | |
| 66 name->bytes(), name->utf8_length(), \ | |
| 67 signature->bytes(), signature->utf8_length()); \ | |
| 68 } \ | |
| 69 } | |
| 70 | |
| 71 #else // ndef DTRACE_ENABLED | |
| 72 | |
| 73 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
| 74 | |
| 75 #endif | |
| 76 | |
| 77 bool nmethod::is_compiled_by_c1() const { | |
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78 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
| 0 | 79 if (is_native_method()) return false; |
| 80 return compiler()->is_c1(); | |
| 81 } | |
| 82 bool nmethod::is_compiled_by_c2() const { | |
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83 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
| 0 | 84 if (is_native_method()) return false; |
| 85 return compiler()->is_c2(); | |
| 86 } | |
| 1692 | 87 bool nmethod::is_compiled_by_shark() const { |
| 88 if (is_native_method()) return false; | |
| 89 assert(compiler() != NULL, "must be"); | |
| 90 return compiler()->is_shark(); | |
| 91 } | |
| 0 | 92 |
| 93 | |
| 94 | |
| 95 //--------------------------------------------------------------------------------- | |
| 96 // NMethod statistics | |
| 97 // They are printed under various flags, including: | |
| 98 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
| 99 // (In the latter two cases, they like other stats are printed to the log only.) | |
| 100 | |
| 101 #ifndef PRODUCT | |
| 102 // These variables are put into one block to reduce relocations | |
| 103 // and make it simpler to print from the debugger. | |
| 104 static | |
| 105 struct nmethod_stats_struct { | |
| 106 int nmethod_count; | |
| 107 int total_size; | |
| 108 int relocation_size; | |
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109 int consts_size; |
| 1748 | 110 int insts_size; |
| 0 | 111 int stub_size; |
| 112 int scopes_data_size; | |
| 113 int scopes_pcs_size; | |
| 114 int dependencies_size; | |
| 115 int handler_table_size; | |
| 116 int nul_chk_table_size; | |
| 117 int oops_size; | |
| 118 | |
| 119 void note_nmethod(nmethod* nm) { | |
| 120 nmethod_count += 1; | |
| 121 total_size += nm->size(); | |
| 122 relocation_size += nm->relocation_size(); | |
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123 consts_size += nm->consts_size(); |
| 1748 | 124 insts_size += nm->insts_size(); |
| 0 | 125 stub_size += nm->stub_size(); |
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126 oops_size += nm->oops_size(); |
| 0 | 127 scopes_data_size += nm->scopes_data_size(); |
| 128 scopes_pcs_size += nm->scopes_pcs_size(); | |
| 129 dependencies_size += nm->dependencies_size(); | |
| 130 handler_table_size += nm->handler_table_size(); | |
| 131 nul_chk_table_size += nm->nul_chk_table_size(); | |
| 132 } | |
| 133 void print_nmethod_stats() { | |
| 134 if (nmethod_count == 0) return; | |
| 135 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
| 136 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
| 137 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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138 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
| 1748 | 139 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
| 0 | 140 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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141 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
| 0 | 142 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
| 143 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
| 144 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
| 145 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
| 146 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
| 147 } | |
| 148 | |
| 149 int native_nmethod_count; | |
| 150 int native_total_size; | |
| 151 int native_relocation_size; | |
| 1748 | 152 int native_insts_size; |
| 0 | 153 int native_oops_size; |
| 154 void note_native_nmethod(nmethod* nm) { | |
| 155 native_nmethod_count += 1; | |
| 156 native_total_size += nm->size(); | |
| 157 native_relocation_size += nm->relocation_size(); | |
| 1748 | 158 native_insts_size += nm->insts_size(); |
| 0 | 159 native_oops_size += nm->oops_size(); |
| 160 } | |
| 161 void print_native_nmethod_stats() { | |
| 162 if (native_nmethod_count == 0) return; | |
| 163 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
| 164 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
| 165 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
| 1748 | 166 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
| 0 | 167 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
| 168 } | |
| 169 | |
| 170 int pc_desc_resets; // number of resets (= number of caches) | |
| 171 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
| 172 int pc_desc_approx; // number of those which have approximate true | |
| 173 int pc_desc_repeats; // number of _last_pc_desc hits | |
| 174 int pc_desc_hits; // number of LRU cache hits | |
| 175 int pc_desc_tests; // total number of PcDesc examinations | |
| 176 int pc_desc_searches; // total number of quasi-binary search steps | |
| 177 int pc_desc_adds; // number of LUR cache insertions | |
| 178 | |
| 179 void print_pc_stats() { | |
| 180 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
| 181 pc_desc_queries, | |
| 182 (double)(pc_desc_tests + pc_desc_searches) | |
| 183 / pc_desc_queries); | |
| 184 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
| 185 pc_desc_resets, | |
| 186 pc_desc_queries, pc_desc_approx, | |
| 187 pc_desc_repeats, pc_desc_hits, | |
| 188 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
| 189 } | |
| 190 } nmethod_stats; | |
| 191 #endif //PRODUCT | |
| 192 | |
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193 |
| 0 | 194 //--------------------------------------------------------------------------------- |
| 195 | |
| 196 | |
| 197 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
| 198 assert(pc != NULL, "Must be non null"); | |
| 199 assert(exception.not_null(), "Must be non null"); | |
| 200 assert(handler != NULL, "Must be non null"); | |
| 201 | |
| 202 _count = 0; | |
| 203 _exception_type = exception->klass(); | |
| 204 _next = NULL; | |
| 205 | |
| 206 add_address_and_handler(pc,handler); | |
| 207 } | |
| 208 | |
| 209 | |
| 210 address ExceptionCache::match(Handle exception, address pc) { | |
| 211 assert(pc != NULL,"Must be non null"); | |
| 212 assert(exception.not_null(),"Must be non null"); | |
| 213 if (exception->klass() == exception_type()) { | |
| 214 return (test_address(pc)); | |
| 215 } | |
| 216 | |
| 217 return NULL; | |
| 218 } | |
| 219 | |
| 220 | |
| 221 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
| 222 assert(exception.not_null(),"Must be non null"); | |
| 223 if (exception->klass() == exception_type() && count() < cache_size) { | |
| 224 return true; | |
| 225 } | |
| 226 return false; | |
| 227 } | |
| 228 | |
| 229 | |
| 230 address ExceptionCache::test_address(address addr) { | |
| 231 for (int i=0; i<count(); i++) { | |
| 232 if (pc_at(i) == addr) { | |
| 233 return handler_at(i); | |
| 234 } | |
| 235 } | |
| 236 return NULL; | |
| 237 } | |
| 238 | |
| 239 | |
| 240 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
| 241 if (test_address(addr) == handler) return true; | |
| 242 if (count() < cache_size) { | |
| 243 set_pc_at(count(),addr); | |
| 244 set_handler_at(count(), handler); | |
| 245 increment_count(); | |
| 246 return true; | |
| 247 } | |
| 248 return false; | |
| 249 } | |
| 250 | |
| 251 | |
| 252 // private method for handling exception cache | |
| 253 // These methods are private, and used to manipulate the exception cache | |
| 254 // directly. | |
| 255 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
| 256 ExceptionCache* ec = exception_cache(); | |
| 257 while (ec != NULL) { | |
| 258 if (ec->match_exception_with_space(exception)) { | |
| 259 return ec; | |
| 260 } | |
| 261 ec = ec->next(); | |
| 262 } | |
| 263 return NULL; | |
| 264 } | |
| 265 | |
| 266 | |
| 267 //----------------------------------------------------------------------------- | |
| 268 | |
| 269 | |
| 270 // Helper used by both find_pc_desc methods. | |
| 271 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
| 272 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
| 273 if (!approximate) | |
| 274 return pc->pc_offset() == pc_offset; | |
| 275 else | |
| 276 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
| 277 } | |
| 278 | |
| 279 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
| 280 if (initial_pc_desc == NULL) { | |
| 281 _last_pc_desc = NULL; // native method | |
| 282 return; | |
| 283 } | |
| 284 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
| 285 // reset the cache by filling it with benign (non-null) values | |
| 286 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
| 287 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
| 288 for (int i = 0; i < cache_size; i++) | |
| 289 _pc_descs[i] = initial_pc_desc; | |
| 290 } | |
| 291 | |
| 292 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
| 293 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
| 294 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
| 295 | |
| 296 // In order to prevent race conditions do not load cache elements | |
| 297 // repeatedly, but use a local copy: | |
| 298 PcDesc* res; | |
| 299 | |
| 300 // Step one: Check the most recently returned value. | |
| 301 res = _last_pc_desc; | |
| 302 if (res == NULL) return NULL; // native method; no PcDescs at all | |
| 303 if (match_desc(res, pc_offset, approximate)) { | |
| 304 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
| 305 return res; | |
| 306 } | |
| 307 | |
| 308 // Step two: Check the LRU cache. | |
| 309 for (int i = 0; i < cache_size; i++) { | |
| 310 res = _pc_descs[i]; | |
| 311 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
| 312 if (match_desc(res, pc_offset, approximate)) { | |
| 313 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
| 314 _last_pc_desc = res; // record this cache hit in case of repeat | |
| 315 return res; | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 // Report failure. | |
| 320 return NULL; | |
| 321 } | |
| 322 | |
| 323 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
| 324 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
| 325 // Update the LRU cache by shifting pc_desc forward: | |
| 326 for (int i = 0; i < cache_size; i++) { | |
| 327 PcDesc* next = _pc_descs[i]; | |
| 328 _pc_descs[i] = pc_desc; | |
| 329 pc_desc = next; | |
| 330 } | |
| 331 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
| 332 } | |
| 333 | |
| 334 // adjust pcs_size so that it is a multiple of both oopSize and | |
| 335 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
| 336 // of oopSize, then 2*sizeof(PcDesc) is) | |
| 337 static int adjust_pcs_size(int pcs_size) { | |
| 338 int nsize = round_to(pcs_size, oopSize); | |
| 339 if ((nsize % sizeof(PcDesc)) != 0) { | |
| 340 nsize = pcs_size + sizeof(PcDesc); | |
| 341 } | |
| 342 assert((nsize % oopSize) == 0, "correct alignment"); | |
| 343 return nsize; | |
| 344 } | |
| 345 | |
| 346 //----------------------------------------------------------------------------- | |
| 347 | |
| 348 | |
| 349 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
| 350 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
| 351 assert(new_entry != NULL,"Must be non null"); | |
| 352 assert(new_entry->next() == NULL, "Must be null"); | |
| 353 | |
| 354 if (exception_cache() != NULL) { | |
| 355 new_entry->set_next(exception_cache()); | |
| 356 } | |
| 357 set_exception_cache(new_entry); | |
| 358 } | |
| 359 | |
| 360 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
| 361 ExceptionCache* prev = NULL; | |
| 362 ExceptionCache* curr = exception_cache(); | |
| 363 assert(curr != NULL, "nothing to remove"); | |
| 364 // find the previous and next entry of ec | |
| 365 while (curr != ec) { | |
| 366 prev = curr; | |
| 367 curr = curr->next(); | |
| 368 assert(curr != NULL, "ExceptionCache not found"); | |
| 369 } | |
| 370 // now: curr == ec | |
| 371 ExceptionCache* next = curr->next(); | |
| 372 if (prev == NULL) { | |
| 373 set_exception_cache(next); | |
| 374 } else { | |
| 375 prev->set_next(next); | |
| 376 } | |
| 377 delete curr; | |
| 378 } | |
| 379 | |
| 380 | |
| 381 // public method for accessing the exception cache | |
| 382 // These are the public access methods. | |
| 383 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
| 384 // We never grab a lock to read the exception cache, so we may | |
| 385 // have false negatives. This is okay, as it can only happen during | |
| 386 // the first few exception lookups for a given nmethod. | |
| 387 ExceptionCache* ec = exception_cache(); | |
| 388 while (ec != NULL) { | |
| 389 address ret_val; | |
| 390 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
| 391 return ret_val; | |
| 392 } | |
| 393 ec = ec->next(); | |
| 394 } | |
| 395 return NULL; | |
| 396 } | |
| 397 | |
| 398 | |
| 399 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
| 400 // There are potential race conditions during exception cache updates, so we | |
| 401 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
| 605 | 402 // we don't lock during reads, it is possible to have several threads attempt |
| 0 | 403 // to update the cache with the same data. We need to check for already inserted |
| 404 // copies of the current data before adding it. | |
| 405 | |
| 406 MutexLocker ml(ExceptionCache_lock); | |
| 407 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
| 408 | |
| 409 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
| 410 target_entry = new ExceptionCache(exception,pc,handler); | |
| 411 add_exception_cache_entry(target_entry); | |
| 412 } | |
| 413 } | |
| 414 | |
| 415 | |
| 416 //-------------end of code for ExceptionCache-------------- | |
| 417 | |
| 418 | |
| 419 int nmethod::total_size() const { | |
| 420 return | |
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421 consts_size() + |
| 1748 | 422 insts_size() + |
| 0 | 423 stub_size() + |
| 424 scopes_data_size() + | |
| 425 scopes_pcs_size() + | |
| 426 handler_table_size() + | |
| 427 nul_chk_table_size(); | |
| 428 } | |
| 429 | |
| 430 const char* nmethod::compile_kind() const { | |
| 431 if (is_osr_method()) return "osr"; | |
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432 if (method() != NULL && is_native_method()) return "c2n"; |
| 0 | 433 return NULL; |
| 434 } | |
| 435 | |
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436 // Fill in default values for various flag fields |
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437 void nmethod::init_defaults() { |
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438 _state = alive; |
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439 _marked_for_reclamation = 0; |
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440 _has_flushed_dependencies = 0; |
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441 _speculatively_disconnected = 0; |
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442 _has_unsafe_access = 0; |
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443 _has_method_handle_invokes = 0; |
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444 _marked_for_deoptimization = 0; |
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445 _lock_count = 0; |
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446 _stack_traversal_mark = 0; |
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447 _unload_reported = false; // jvmti state |
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448 |
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449 NOT_PRODUCT(_has_debug_info = false); |
| 1726 | 450 #ifdef ASSERT |
| 451 _oops_are_stale = false; | |
| 452 #endif | |
| 453 | |
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454 _oops_do_mark_link = NULL; |
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455 _jmethod_id = NULL; |
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456 _osr_link = NULL; |
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457 _scavenge_root_link = NULL; |
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458 _scavenge_root_state = 0; |
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459 _saved_nmethod_link = NULL; |
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460 _compiler = NULL; |
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461 |
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462 #ifdef HAVE_DTRACE_H |
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463 _trap_offset = 0; |
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464 #endif // def HAVE_DTRACE_H |
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465 } |
| 0 | 466 |
| 467 | |
| 468 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
| 469 CodeBuffer *code_buffer, | |
| 470 int vep_offset, | |
| 471 int frame_complete, | |
| 472 int frame_size, | |
| 473 ByteSize basic_lock_owner_sp_offset, | |
| 474 ByteSize basic_lock_sp_offset, | |
| 475 OopMapSet* oop_maps) { | |
| 476 // create nmethod | |
| 477 nmethod* nm = NULL; | |
| 478 { | |
| 479 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 480 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
| 481 CodeOffsets offsets; | |
| 482 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
| 483 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
| 484 nm = new (native_nmethod_size) | |
| 485 nmethod(method(), native_nmethod_size, &offsets, | |
| 486 code_buffer, frame_size, | |
| 487 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
| 488 oop_maps); | |
| 489 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
| 490 if (PrintAssembly && nm != NULL) | |
| 491 Disassembler::decode(nm); | |
| 492 } | |
| 493 // verify nmethod | |
| 494 debug_only(if (nm) nm->verify();) // might block | |
| 495 | |
| 496 if (nm != NULL) { | |
| 497 nm->log_new_nmethod(); | |
| 498 } | |
| 499 | |
| 500 return nm; | |
| 501 } | |
| 502 | |
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503 #ifdef HAVE_DTRACE_H |
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504 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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505 CodeBuffer *code_buffer, |
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506 int vep_offset, |
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507 int trap_offset, |
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508 int frame_complete, |
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509 int frame_size) { |
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510 // create nmethod |
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511 nmethod* nm = NULL; |
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512 { |
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513 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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514 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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515 CodeOffsets offsets; |
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516 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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517 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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518 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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519 |
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520 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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521 |
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522 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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523 if (PrintAssembly && nm != NULL) |
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524 Disassembler::decode(nm); |
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525 } |
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526 // verify nmethod |
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527 debug_only(if (nm) nm->verify();) // might block |
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528 |
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529 if (nm != NULL) { |
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530 nm->log_new_nmethod(); |
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531 } |
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532 |
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533 return nm; |
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534 } |
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535 |
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536 #endif // def HAVE_DTRACE_H |
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537 |
| 0 | 538 nmethod* nmethod::new_nmethod(methodHandle method, |
| 539 int compile_id, | |
| 540 int entry_bci, | |
| 541 CodeOffsets* offsets, | |
| 542 int orig_pc_offset, | |
| 543 DebugInformationRecorder* debug_info, | |
| 544 Dependencies* dependencies, | |
| 545 CodeBuffer* code_buffer, int frame_size, | |
| 546 OopMapSet* oop_maps, | |
| 547 ExceptionHandlerTable* handler_table, | |
| 548 ImplicitExceptionTable* nul_chk_table, | |
| 549 AbstractCompiler* compiler, | |
| 550 int comp_level | |
| 551 ) | |
| 552 { | |
| 553 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 554 // create nmethod | |
| 555 nmethod* nm = NULL; | |
| 556 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 557 int nmethod_size = | |
| 558 allocation_size(code_buffer, sizeof(nmethod)) | |
| 559 + adjust_pcs_size(debug_info->pcs_size()) | |
| 560 + round_to(dependencies->size_in_bytes() , oopSize) | |
| 561 + round_to(handler_table->size_in_bytes(), oopSize) | |
| 562 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
| 563 + round_to(debug_info->data_size() , oopSize); | |
| 564 nm = new (nmethod_size) | |
| 565 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
| 566 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
| 567 oop_maps, | |
| 568 handler_table, | |
| 569 nul_chk_table, | |
| 570 compiler, | |
| 571 comp_level); | |
| 572 if (nm != NULL) { | |
| 573 // To make dependency checking during class loading fast, record | |
| 574 // the nmethod dependencies in the classes it is dependent on. | |
| 575 // This allows the dependency checking code to simply walk the | |
| 576 // class hierarchy above the loaded class, checking only nmethods | |
| 577 // which are dependent on those classes. The slow way is to | |
| 578 // check every nmethod for dependencies which makes it linear in | |
| 579 // the number of methods compiled. For applications with a lot | |
| 580 // classes the slow way is too slow. | |
| 581 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
| 582 klassOop klass = deps.context_type(); | |
| 583 if (klass == NULL) continue; // ignore things like evol_method | |
| 584 | |
| 585 // record this nmethod as dependent on this klass | |
| 586 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
| 587 } | |
| 588 } | |
| 589 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
| 590 if (PrintAssembly && nm != NULL) | |
| 591 Disassembler::decode(nm); | |
| 592 } | |
| 593 | |
| 594 // verify nmethod | |
| 595 debug_only(if (nm) nm->verify();) // might block | |
| 596 | |
| 597 if (nm != NULL) { | |
| 598 nm->log_new_nmethod(); | |
| 599 } | |
| 600 | |
| 601 // done | |
| 602 return nm; | |
| 603 } | |
| 604 | |
| 605 | |
| 606 // For native wrappers | |
| 607 nmethod::nmethod( | |
| 608 methodOop method, | |
| 609 int nmethod_size, | |
| 610 CodeOffsets* offsets, | |
| 611 CodeBuffer* code_buffer, | |
| 612 int frame_size, | |
| 613 ByteSize basic_lock_owner_sp_offset, | |
| 614 ByteSize basic_lock_sp_offset, | |
| 615 OopMapSet* oop_maps ) | |
| 616 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
| 617 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 2019 | 618 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
| 619 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
| 0 | 620 { |
| 621 { | |
| 622 debug_only(No_Safepoint_Verifier nsv;) | |
| 623 assert_locked_or_safepoint(CodeCache_lock); | |
| 624 | |
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625 init_defaults(); |
| 0 | 626 _method = method; |
| 627 _entry_bci = InvocationEntryBci; | |
| 628 // We have no exception handler or deopt handler make the | |
| 629 // values something that will never match a pc like the nmethod vtable entry | |
| 630 _exception_offset = 0; | |
| 631 _deoptimize_offset = 0; | |
| 1204 | 632 _deoptimize_mh_offset = 0; |
| 0 | 633 _orig_pc_offset = 0; |
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634 |
| 1748 | 635 _consts_offset = data_offset(); |
| 0 | 636 _stub_offset = data_offset(); |
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637 _oops_offset = data_offset(); |
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638 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
| 0 | 639 _scopes_pcs_offset = _scopes_data_offset; |
| 640 _dependencies_offset = _scopes_pcs_offset; | |
| 641 _handler_table_offset = _dependencies_offset; | |
| 642 _nul_chk_table_offset = _handler_table_offset; | |
| 643 _nmethod_end_offset = _nul_chk_table_offset; | |
| 644 _compile_id = 0; // default | |
| 645 _comp_level = CompLevel_none; | |
| 1748 | 646 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| 647 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 0 | 648 _osr_entry_point = NULL; |
| 649 _exception_cache = NULL; | |
| 650 _pc_desc_cache.reset_to(NULL); | |
| 651 | |
| 652 code_buffer->copy_oops_to(this); | |
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653 debug_only(verify_scavenge_root_oops()); |
| 0 | 654 CodeCache::commit(this); |
| 655 } | |
| 656 | |
| 657 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
| 658 ttyLocker ttyl; // keep the following output all in one block | |
| 659 // This output goes directly to the tty, not the compiler log. | |
| 660 // To enable tools to match it up with the compilation activity, | |
| 661 // be sure to tag this tty output with the compile ID. | |
| 662 if (xtty != NULL) { | |
| 663 xtty->begin_head("print_native_nmethod"); | |
| 664 xtty->method(_method); | |
| 665 xtty->stamp(); | |
| 666 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 667 } | |
| 668 // print the header part first | |
| 669 print(); | |
| 670 // then print the requested information | |
| 671 if (PrintNativeNMethods) { | |
| 672 print_code(); | |
| 673 oop_maps->print(); | |
| 674 } | |
| 675 if (PrintRelocations) { | |
| 676 print_relocations(); | |
| 677 } | |
| 678 if (xtty != NULL) { | |
| 679 xtty->tail("print_native_nmethod"); | |
| 680 } | |
| 681 } | |
| 682 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 683 } | |
| 684 | |
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685 // For dtrace wrappers |
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686 #ifdef HAVE_DTRACE_H |
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687 nmethod::nmethod( |
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688 methodOop method, |
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689 int nmethod_size, |
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690 CodeOffsets* offsets, |
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691 CodeBuffer* code_buffer, |
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692 int frame_size) |
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693 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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694 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
| 2019 | 695 _native_receiver_sp_offset(in_ByteSize(-1)), |
| 696 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
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697 { |
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698 { |
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699 debug_only(No_Safepoint_Verifier nsv;) |
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700 assert_locked_or_safepoint(CodeCache_lock); |
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701 |
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702 init_defaults(); |
|
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703 _method = method; |
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704 _entry_bci = InvocationEntryBci; |
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705 // We have no exception handler or deopt handler make the |
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706 // values something that will never match a pc like the nmethod vtable entry |
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707 _exception_offset = 0; |
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708 _deoptimize_offset = 0; |
| 1204 | 709 _deoptimize_mh_offset = 0; |
|
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710 _unwind_handler_offset = -1; |
|
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711 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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712 _orig_pc_offset = 0; |
| 1748 | 713 _consts_offset = data_offset(); |
|
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714 _stub_offset = data_offset(); |
|
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715 _oops_offset = data_offset(); |
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716 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
|
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717 _scopes_pcs_offset = _scopes_data_offset; |
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718 _dependencies_offset = _scopes_pcs_offset; |
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719 _handler_table_offset = _dependencies_offset; |
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720 _nul_chk_table_offset = _handler_table_offset; |
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721 _nmethod_end_offset = _nul_chk_table_offset; |
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722 _compile_id = 0; // default |
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723 _comp_level = CompLevel_none; |
| 1748 | 724 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| 725 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
|
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726 _osr_entry_point = NULL; |
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727 _exception_cache = NULL; |
|
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728 _pc_desc_cache.reset_to(NULL); |
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729 |
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730 code_buffer->copy_oops_to(this); |
|
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731 debug_only(verify_scavenge_root_oops()); |
|
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732 CodeCache::commit(this); |
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733 } |
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734 |
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735 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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736 ttyLocker ttyl; // keep the following output all in one block |
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737 // This output goes directly to the tty, not the compiler log. |
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738 // To enable tools to match it up with the compilation activity, |
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739 // be sure to tag this tty output with the compile ID. |
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740 if (xtty != NULL) { |
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741 xtty->begin_head("print_dtrace_nmethod"); |
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742 xtty->method(_method); |
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743 xtty->stamp(); |
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744 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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745 } |
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746 // print the header part first |
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747 print(); |
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748 // then print the requested information |
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749 if (PrintNMethods) { |
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750 print_code(); |
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751 } |
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752 if (PrintRelocations) { |
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753 print_relocations(); |
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754 } |
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755 if (xtty != NULL) { |
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756 xtty->tail("print_dtrace_nmethod"); |
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757 } |
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758 } |
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759 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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760 } |
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761 #endif // def HAVE_DTRACE_H |
| 0 | 762 |
| 763 void* nmethod::operator new(size_t size, int nmethod_size) { | |
| 764 // Always leave some room in the CodeCache for I2C/C2I adapters | |
| 765 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
| 766 return CodeCache::allocate(nmethod_size); | |
| 767 } | |
| 768 | |
| 769 | |
| 770 nmethod::nmethod( | |
| 771 methodOop method, | |
| 772 int nmethod_size, | |
| 773 int compile_id, | |
| 774 int entry_bci, | |
| 775 CodeOffsets* offsets, | |
| 776 int orig_pc_offset, | |
| 777 DebugInformationRecorder* debug_info, | |
| 778 Dependencies* dependencies, | |
| 779 CodeBuffer *code_buffer, | |
| 780 int frame_size, | |
| 781 OopMapSet* oop_maps, | |
| 782 ExceptionHandlerTable* handler_table, | |
| 783 ImplicitExceptionTable* nul_chk_table, | |
| 784 AbstractCompiler* compiler, | |
| 785 int comp_level | |
| 786 ) | |
| 787 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
| 788 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 2019 | 789 _native_receiver_sp_offset(in_ByteSize(-1)), |
| 790 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
| 0 | 791 { |
| 792 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 793 { | |
| 794 debug_only(No_Safepoint_Verifier nsv;) | |
| 795 assert_locked_or_safepoint(CodeCache_lock); | |
| 796 | |
|
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797 init_defaults(); |
| 0 | 798 _method = method; |
|
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799 _entry_bci = entry_bci; |
| 0 | 800 _compile_id = compile_id; |
| 801 _comp_level = comp_level; | |
| 802 _compiler = compiler; | |
| 803 _orig_pc_offset = orig_pc_offset; | |
| 1748 | 804 |
| 805 // Section offsets | |
|
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806 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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807 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
| 0 | 808 |
| 809 // Exception handler and deopt handler are in the stub section | |
|
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810 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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811 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
| 1748 | 812 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
| 813 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
|
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814 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
|
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815 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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816 } else { |
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817 _deoptimize_mh_offset = -1; |
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818 } |
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819 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
| 1748 | 820 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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821 } else { |
| 1748 | 822 _unwind_handler_offset = -1; |
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823 } |
| 1748 | 824 |
|
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825 _oops_offset = data_offset(); |
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826 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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827 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
| 0 | 828 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
| 829 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
| 830 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
| 831 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
| 832 | |
| 1748 | 833 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
| 834 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 835 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
| 0 | 836 _exception_cache = NULL; |
| 837 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
| 838 | |
| 839 // Copy contents of ScopeDescRecorder to nmethod | |
| 840 code_buffer->copy_oops_to(this); | |
| 841 debug_info->copy_to(this); | |
| 842 dependencies->copy_to(this); | |
|
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843 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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844 CodeCache::add_scavenge_root_nmethod(this); |
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845 } |
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846 debug_only(verify_scavenge_root_oops()); |
| 0 | 847 |
| 848 CodeCache::commit(this); | |
| 849 | |
| 850 // Copy contents of ExceptionHandlerTable to nmethod | |
| 851 handler_table->copy_to(this); | |
| 852 nul_chk_table->copy_to(this); | |
| 853 | |
| 854 // we use the information of entry points to find out if a method is | |
| 855 // static or non static | |
| 856 assert(compiler->is_c2() || | |
| 857 _method->is_static() == (entry_point() == _verified_entry_point), | |
| 858 " entry points must be same for static methods and vice versa"); | |
| 859 } | |
| 860 | |
|
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861 bool printnmethods = PrintNMethods |
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862 || CompilerOracle::should_print(_method) |
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863 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
| 0 | 864 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
| 865 print_nmethod(printnmethods); | |
| 866 } | |
| 867 | |
| 868 // Note: Do not verify in here as the CodeCache_lock is | |
| 869 // taken which would conflict with the CompiledIC_lock | |
| 870 // which taken during the verification of call sites. | |
| 871 // (was bug - gri 10/25/99) | |
| 872 | |
| 873 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
| 874 } | |
| 875 | |
| 876 | |
| 877 // Print a short set of xml attributes to identify this nmethod. The | |
| 878 // output should be embedded in some other element. | |
| 879 void nmethod::log_identity(xmlStream* log) const { | |
| 880 log->print(" compile_id='%d'", compile_id()); | |
| 881 const char* nm_kind = compile_kind(); | |
| 882 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
| 883 if (compiler() != NULL) { | |
| 884 log->print(" compiler='%s'", compiler()->name()); | |
| 885 } | |
| 1783 | 886 if (TieredCompilation) { |
| 887 log->print(" level='%d'", comp_level()); | |
| 888 } | |
| 0 | 889 } |
| 890 | |
| 891 | |
| 892 #define LOG_OFFSET(log, name) \ | |
| 893 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
| 894 log->print(" " XSTR(name) "_offset='%d'" , \ | |
| 895 (intptr_t)name##_begin() - (intptr_t)this) | |
| 896 | |
| 897 | |
| 898 void nmethod::log_new_nmethod() const { | |
| 899 if (LogCompilation && xtty != NULL) { | |
| 900 ttyLocker ttyl; | |
| 901 HandleMark hm; | |
| 902 xtty->begin_elem("nmethod"); | |
| 903 log_identity(xtty); | |
| 1748 | 904 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
| 0 | 905 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
| 906 | |
| 907 LOG_OFFSET(xtty, relocation); | |
|
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908 LOG_OFFSET(xtty, consts); |
| 1748 | 909 LOG_OFFSET(xtty, insts); |
| 0 | 910 LOG_OFFSET(xtty, stub); |
| 911 LOG_OFFSET(xtty, scopes_data); | |
| 912 LOG_OFFSET(xtty, scopes_pcs); | |
| 913 LOG_OFFSET(xtty, dependencies); | |
| 914 LOG_OFFSET(xtty, handler_table); | |
| 915 LOG_OFFSET(xtty, nul_chk_table); | |
| 916 LOG_OFFSET(xtty, oops); | |
| 917 | |
| 918 xtty->method(method()); | |
| 919 xtty->stamp(); | |
| 920 xtty->end_elem(); | |
| 921 } | |
| 922 } | |
| 923 | |
| 924 #undef LOG_OFFSET | |
| 925 | |
| 926 | |
| 1783 | 927 void nmethod::print_compilation(outputStream *st, const char *method_name, const char *title, |
| 928 methodOop method, bool is_blocking, int compile_id, int bci, int comp_level) { | |
| 929 bool is_synchronized = false, has_xhandler = false, is_native = false; | |
| 930 int code_size = -1; | |
| 931 if (method != NULL) { | |
| 932 is_synchronized = method->is_synchronized(); | |
| 933 has_xhandler = method->has_exception_handler(); | |
| 934 is_native = method->is_native(); | |
| 935 code_size = method->code_size(); | |
| 936 } | |
| 937 // print compilation number | |
| 938 st->print("%7d %3d", (int)tty->time_stamp().milliseconds(), compile_id); | |
| 939 | |
| 940 // print method attributes | |
| 941 const bool is_osr = bci != InvocationEntryBci; | |
| 942 const char blocking_char = is_blocking ? 'b' : ' '; | |
| 943 const char compile_type = is_osr ? '%' : ' '; | |
| 944 const char sync_char = is_synchronized ? 's' : ' '; | |
| 945 const char exception_char = has_xhandler ? '!' : ' '; | |
| 946 const char native_char = is_native ? 'n' : ' '; | |
| 947 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); | |
| 948 if (TieredCompilation) { | |
| 949 st->print("%d ", comp_level); | |
| 950 } | |
| 951 | |
| 952 // print optional title | |
| 953 bool do_nl = false; | |
| 954 if (title != NULL) { | |
| 955 int tlen = (int) strlen(title); | |
| 956 bool do_nl = false; | |
| 957 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } | |
| 958 st->print("%.*s", tlen, title); | |
| 959 } else { | |
| 960 do_nl = true; | |
| 961 } | |
| 962 | |
| 963 // print method name string if given | |
| 964 if (method_name != NULL) { | |
| 965 st->print(method_name); | |
| 966 } else { | |
| 967 // otherwise as the method to print itself | |
| 968 if (method != NULL && !Universe::heap()->is_gc_active()) { | |
| 969 method->print_short_name(st); | |
| 970 } else { | |
| 971 st->print("(method)"); | |
| 972 } | |
| 973 } | |
| 974 | |
| 975 if (method != NULL) { | |
| 976 // print osr_bci if any | |
| 977 if (is_osr) st->print(" @ %d", bci); | |
| 978 // print method size | |
| 979 st->print(" (%d bytes)", code_size); | |
| 980 } | |
| 981 if (do_nl) st->cr(); | |
| 982 } | |
| 983 | |
| 0 | 984 // Print out more verbose output usually for a newly created nmethod. |
| 985 void nmethod::print_on(outputStream* st, const char* title) const { | |
| 986 if (st != NULL) { | |
| 987 ttyLocker ttyl; | |
| 1783 | 988 print_compilation(st, /*method_name*/NULL, title, |
| 989 method(), /*is_blocking*/false, | |
|
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990 compile_id(), |
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991 is_osr_method() ? osr_entry_bci() : InvocationEntryBci, |
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992 comp_level()); |
| 0 | 993 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
| 994 } | |
| 995 } | |
| 996 | |
| 997 | |
| 998 void nmethod::print_nmethod(bool printmethod) { | |
| 999 ttyLocker ttyl; // keep the following output all in one block | |
| 1000 if (xtty != NULL) { | |
| 1001 xtty->begin_head("print_nmethod"); | |
| 1002 xtty->stamp(); | |
| 1003 xtty->end_head(); | |
| 1004 } | |
| 1005 // print the header part first | |
| 1006 print(); | |
| 1007 // then print the requested information | |
| 1008 if (printmethod) { | |
| 1009 print_code(); | |
| 1010 print_pcs(); | |
| 1011 oop_maps()->print(); | |
| 1012 } | |
| 1013 if (PrintDebugInfo) { | |
| 1014 print_scopes(); | |
| 1015 } | |
| 1016 if (PrintRelocations) { | |
| 1017 print_relocations(); | |
| 1018 } | |
| 1019 if (PrintDependencies) { | |
| 1020 print_dependencies(); | |
| 1021 } | |
| 1022 if (PrintExceptionHandlers) { | |
| 1023 print_handler_table(); | |
| 1024 print_nul_chk_table(); | |
| 1025 } | |
| 1026 if (xtty != NULL) { | |
| 1027 xtty->tail("print_nmethod"); | |
| 1028 } | |
| 1029 } | |
| 1030 | |
| 1031 | |
|
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1032 // Promote one word from an assembly-time handle to a live embedded oop. |
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1033 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
|
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1034 if (handle == NULL || |
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1035 // As a special case, IC oops are initialized to 1 or -1. |
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1036 handle == (jobject) Universe::non_oop_word()) { |
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1037 (*dest) = (oop) handle; |
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1038 } else { |
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1039 (*dest) = JNIHandles::resolve_non_null(handle); |
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1040 } |
|
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1041 } |
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1042 |
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1043 |
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1044 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1045 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1046 int length = array->length(); |
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1047 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1048 oop* dest = oops_begin(); |
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1049 for (int index = 0 ; index < length; index++) { |
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1050 initialize_immediate_oop(&dest[index], array->at(index)); |
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1051 } |
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1052 |
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1053 // Now we can fix up all the oops in the code. We need to do this |
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1054 // in the code because the assembler uses jobjects as placeholders. |
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1055 // The code and relocations have already been initialized by the |
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1056 // CodeBlob constructor, so it is valid even at this early point to |
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1057 // iterate over relocations and patch the code. |
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1058 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1059 } |
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1060 |
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1061 |
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1062 bool nmethod::is_at_poll_return(address pc) { |
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1063 RelocIterator iter(this, pc, pc+1); |
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1064 while (iter.next()) { |
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1065 if (iter.type() == relocInfo::poll_return_type) |
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1066 return true; |
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1067 } |
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1068 return false; |
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1069 } |
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1070 |
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1071 |
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1072 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1073 RelocIterator iter(this, pc, pc+1); |
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1074 while (iter.next()) { |
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1075 relocInfo::relocType t = iter.type(); |
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1076 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1077 return true; |
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1078 } |
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1079 return false; |
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1080 } |
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1081 |
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1082 |
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1083 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1084 // re-patch all oop-bearing instructions, just in case some oops moved |
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1085 RelocIterator iter(this, begin, end); |
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1086 while (iter.next()) { |
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1087 if (iter.type() == relocInfo::oop_type) { |
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1088 oop_Relocation* reloc = iter.oop_reloc(); |
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1089 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1090 oop* dest = reloc->oop_addr(); |
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1091 initialize_immediate_oop(dest, (jobject) *dest); |
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1092 } |
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1093 // Refresh the oop-related bits of this instruction. |
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1094 reloc->fix_oop_relocation(); |
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1095 } |
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1096 |
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1097 // There must not be any interfering patches or breakpoints. |
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1098 assert(!(iter.type() == relocInfo::breakpoint_type |
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1099 && iter.breakpoint_reloc()->active()), |
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1100 "no active breakpoint"); |
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1101 } |
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1102 } |
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1103 |
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1104 |
| 0 | 1105 ScopeDesc* nmethod::scope_desc_at(address pc) { |
| 1106 PcDesc* pd = pc_desc_at(pc); | |
| 1107 guarantee(pd != NULL, "scope must be present"); | |
| 1108 return new ScopeDesc(this, pd->scope_decode_offset(), | |
|
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1109 pd->obj_decode_offset(), pd->should_reexecute(), |
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1110 pd->return_oop()); |
| 0 | 1111 } |
| 1112 | |
| 1113 | |
| 1114 void nmethod::clear_inline_caches() { | |
| 1115 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
| 1116 if (is_zombie()) { | |
| 1117 return; | |
| 1118 } | |
| 1119 | |
| 1120 RelocIterator iter(this); | |
| 1121 while (iter.next()) { | |
| 1122 iter.reloc()->clear_inline_cache(); | |
| 1123 } | |
| 1124 } | |
| 1125 | |
| 1126 | |
| 1127 void nmethod::cleanup_inline_caches() { | |
| 1128 | |
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1129 assert_locked_or_safepoint(CompiledIC_lock); |
| 0 | 1130 |
| 1131 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1132 // first few bytes. If an oop in the old code was there, that oop | |
| 1133 // should not get GC'd. Skip the first few bytes of oops on | |
| 1134 // not-entrant methods. | |
| 1135 address low_boundary = verified_entry_point(); | |
| 1136 if (!is_in_use()) { | |
| 1137 low_boundary += NativeJump::instruction_size; | |
| 1138 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1139 // This means that the low_boundary is going to be a little too high. | |
| 1140 // This shouldn't matter, since oops of non-entrant methods are never used. | |
| 1141 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
| 1142 } | |
| 1143 | |
| 1144 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
| 1145 ResourceMark rm; | |
| 1146 RelocIterator iter(this, low_boundary); | |
| 1147 while(iter.next()) { | |
| 1148 switch(iter.type()) { | |
| 1149 case relocInfo::virtual_call_type: | |
| 1150 case relocInfo::opt_virtual_call_type: { | |
| 1151 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1152 // Ok, to lookup references to zombies here | |
| 1153 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
| 1154 if( cb != NULL && cb->is_nmethod() ) { | |
| 1155 nmethod* nm = (nmethod*)cb; | |
| 1156 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1157 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
| 0 | 1158 } |
| 1159 break; | |
| 1160 } | |
| 1161 case relocInfo::static_call_type: { | |
| 1162 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
| 1163 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
| 1164 if( cb != NULL && cb->is_nmethod() ) { | |
| 1165 nmethod* nm = (nmethod*)cb; | |
| 1166 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1202 | 1167 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
| 0 | 1168 } |
| 1169 break; | |
| 1170 } | |
| 1171 } | |
| 1172 } | |
| 1173 } | |
| 1174 | |
|
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1175 // This is a private interface with the sweeper. |
| 0 | 1176 void nmethod::mark_as_seen_on_stack() { |
| 1177 assert(is_not_entrant(), "must be a non-entrant method"); | |
|
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1178 // Set the traversal mark to ensure that the sweeper does 2 |
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1179 // cleaning passes before moving to zombie. |
| 0 | 1180 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
| 1181 } | |
| 1182 | |
| 1183 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
| 1184 bool nmethod::can_not_entrant_be_converted() { | |
| 1185 assert(is_not_entrant(), "must be a non-entrant method"); | |
| 1186 | |
| 1187 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
| 1188 // count can be greater than the stack traversal count before it hits the | |
| 1189 // nmethod for the second time. | |
| 1190 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
| 1191 } | |
| 1192 | |
| 1193 void nmethod::inc_decompile_count() { | |
| 1783 | 1194 if (!is_compiled_by_c2()) return; |
| 0 | 1195 // Could be gated by ProfileTraps, but do not bother... |
| 1196 methodOop m = method(); | |
| 1197 if (m == NULL) return; | |
| 1198 methodDataOop mdo = m->method_data(); | |
| 1199 if (mdo == NULL) return; | |
| 1200 // There is a benign race here. See comments in methodDataOop.hpp. | |
| 1201 mdo->inc_decompile_count(); | |
| 1202 } | |
| 1203 | |
| 1204 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
| 1205 | |
| 1206 post_compiled_method_unload(); | |
| 1207 | |
| 1208 // Since this nmethod is being unloaded, make sure that dependencies | |
| 1209 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
| 1210 // indicate that this work is being done during a GC. | |
| 1211 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
| 1212 assert(is_alive != NULL, "Should be non-NULL"); | |
| 1213 // A non-NULL is_alive closure indicates that this is being called during GC. | |
| 1214 flush_dependencies(is_alive); | |
| 1215 | |
| 1216 // Break cycle between nmethod & method | |
| 1217 if (TraceClassUnloading && WizardMode) { | |
| 1218 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
| 1219 " unloadable], methodOop(" INTPTR_FORMAT | |
| 1220 "), cause(" INTPTR_FORMAT ")", | |
| 1221 this, (address)_method, (address)cause); | |
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1222 if (!Universe::heap()->is_gc_active()) |
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1223 cause->klass()->print(); |
| 0 | 1224 } |
| 941 | 1225 // Unlink the osr method, so we do not look this up again |
| 1226 if (is_osr_method()) { | |
| 1227 invalidate_osr_method(); | |
| 1228 } | |
| 0 | 1229 // If _method is already NULL the methodOop is about to be unloaded, |
| 1230 // so we don't have to break the cycle. Note that it is possible to | |
| 1231 // have the methodOop live here, in case we unload the nmethod because | |
| 1232 // it is pointing to some oop (other than the methodOop) being unloaded. | |
| 1233 if (_method != NULL) { | |
| 1234 // OSR methods point to the methodOop, but the methodOop does not | |
| 1235 // point back! | |
| 1236 if (_method->code() == this) { | |
| 1237 _method->clear_code(); // Break a cycle | |
| 1238 } | |
| 1239 _method = NULL; // Clear the method of this dead nmethod | |
| 1240 } | |
| 1241 // Make the class unloaded - i.e., change state and notify sweeper | |
|
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1242 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
| 0 | 1243 if (is_in_use()) { |
| 1244 // Transitioning directly from live to unloaded -- so | |
| 1245 // we need to force a cache clean-up; remember this | |
| 1246 // for later on. | |
| 1247 CodeCache::set_needs_cache_clean(true); | |
| 1248 } | |
|
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1249 _state = unloaded; |
| 0 | 1250 |
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1251 // Log the unloading. |
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1252 log_state_change(); |
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1253 |
| 0 | 1254 // The methodOop is gone at this point |
| 1255 assert(_method == NULL, "Tautology"); | |
| 1256 | |
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1257 set_osr_link(NULL); |
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1258 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
| 0 | 1259 NMethodSweeper::notify(this); |
| 1260 } | |
| 1261 | |
| 1262 void nmethod::invalidate_osr_method() { | |
| 1263 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
| 1264 // Remove from list of active nmethods | |
| 1265 if (method() != NULL) | |
| 1266 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
| 1267 // Set entry as invalid | |
| 1268 _entry_bci = InvalidOSREntryBci; | |
| 1269 } | |
| 1270 | |
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1271 void nmethod::log_state_change() const { |
| 0 | 1272 if (LogCompilation) { |
| 1273 if (xtty != NULL) { | |
| 1274 ttyLocker ttyl; // keep the following output all in one block | |
|
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1275 if (_state == unloaded) { |
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1276 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1277 os::current_thread_id()); |
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1278 } else { |
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1279 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1280 os::current_thread_id(), |
|
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1281 (_state == zombie ? " zombie='1'" : "")); |
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1282 } |
| 0 | 1283 log_identity(xtty); |
| 1284 xtty->stamp(); | |
| 1285 xtty->end_elem(); | |
| 1286 } | |
| 1287 } | |
|
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1288 if (PrintCompilation && _state != unloaded) { |
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1289 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
| 0 | 1290 tty->cr(); |
| 1291 } | |
| 1292 } | |
| 1293 | |
| 1294 // Common functionality for both make_not_entrant and make_zombie | |
| 1141 | 1295 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
| 0 | 1296 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
| 1297 | |
|
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1298 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
| 0 | 1299 nmethodLocker nml(this); |
|
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1300 methodHandle the_method(method()); |
| 1726 | 1301 No_Safepoint_Verifier nsv; |
| 0 | 1302 |
| 1303 { | |
|
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1304 // If the method is already zombie there is nothing to do |
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1305 if (is_zombie()) { |
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1306 return false; |
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1307 } |
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1308 |
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1309 // invalidate osr nmethod before acquiring the patching lock since |
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1310 // they both acquire leaf locks and we don't want a deadlock. |
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1311 // This logic is equivalent to the logic below for patching the |
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1312 // verified entry point of regular methods. |
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1313 if (is_osr_method()) { |
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1314 // this effectively makes the osr nmethod not entrant |
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1315 invalidate_osr_method(); |
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1316 } |
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1317 |
| 0 | 1318 // Enter critical section. Does not block for safepoint. |
| 1319 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
|
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1320 |
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1321 if (_state == state) { |
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1322 // another thread already performed this transition so nothing |
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1323 // to do, but return false to indicate this. |
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1324 return false; |
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1325 } |
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1326 |
| 0 | 1327 // The caller can be calling the method statically or through an inline |
| 1328 // cache call. | |
|
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1329 if (!is_osr_method() && !is_not_entrant()) { |
| 0 | 1330 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
| 1331 SharedRuntime::get_handle_wrong_method_stub()); | |
| 1332 } | |
| 1333 | |
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1334 if (is_in_use()) { |
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1335 // It's a true state change, so mark the method as decompiled. |
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1336 // Do it only for transition from alive. |
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1337 inc_decompile_count(); |
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1338 } |
|
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1339 |
| 0 | 1340 // Change state |
|
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1341 _state = state; |
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1342 |
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1343 // Log the transition once |
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1344 log_state_change(); |
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1345 |
|
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1346 // Remove nmethod from method. |
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1347 // We need to check if both the _code and _from_compiled_code_entry_point |
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1348 // refer to this nmethod because there is a race in setting these two fields |
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1349 // in methodOop as seen in bugid 4947125. |
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1350 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1351 // could be flushed and the compiler and vtable stubs could still call |
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1352 // through it. |
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1353 if (method() != NULL && (method()->code() == this || |
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1354 method()->from_compiled_entry() == verified_entry_point())) { |
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1355 HandleMark hm; |
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1356 method()->clear_code(); |
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1357 } |
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1358 |
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1359 if (state == not_entrant) { |
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1360 mark_as_seen_on_stack(); |
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1361 } |
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1362 |
| 0 | 1363 } // leave critical region under Patching_lock |
| 1364 | |
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1365 // When the nmethod becomes zombie it is no longer alive so the |
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1366 // dependencies must be flushed. nmethods in the not_entrant |
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1367 // state will be flushed later when the transition to zombie |
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1368 // happens or they get unloaded. |
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1369 if (state == zombie) { |
| 1726 | 1370 { |
| 1371 // Flushing dependecies must be done before any possible | |
| 1372 // safepoint can sneak in, otherwise the oops used by the | |
| 1373 // dependency logic could have become stale. | |
| 1374 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1375 flush_dependencies(NULL); | |
| 1376 } | |
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1377 |
| 1726 | 1378 { |
| 1379 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
| 1380 // and it hasn't already been reported for this nmethod then report it now. | |
| 1381 // (the event may have been reported earilier if the GC marked it for unloading). | |
| 1382 Pause_No_Safepoint_Verifier pnsv(&nsv); | |
| 1383 post_compiled_method_unload(); | |
| 1384 } | |
| 1385 | |
| 1386 #ifdef ASSERT | |
| 1387 // It's no longer safe to access the oops section since zombie | |
| 1388 // nmethods aren't scanned for GC. | |
| 1389 _oops_are_stale = true; | |
| 1390 #endif | |
|
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1391 } else { |
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1392 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1393 } |
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1394 |
| 0 | 1395 if (TraceCreateZombies) { |
| 1396 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
| 1397 } | |
| 1398 | |
| 1399 // Make sweeper aware that there is a zombie method that needs to be removed | |
| 1400 NMethodSweeper::notify(this); | |
| 1401 | |
|
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changeset
|
1402 return true; |
| 0 | 1403 } |
| 1404 | |
| 1405 void nmethod::flush() { | |
| 1406 // Note that there are no valid oops in the nmethod anymore. | |
| 1407 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
| 1408 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
| 1409 | |
| 1410 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
|
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1490
diff
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|
1411 assert_locked_or_safepoint(CodeCache_lock); |
| 0 | 1412 |
| 1413 // completely deallocate this method | |
| 1414 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
| 1415 if (PrintMethodFlushing) { | |
| 1202 | 1416 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
| 1417 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
| 0 | 1418 } |
| 1419 | |
| 1420 // We need to deallocate any ExceptionCache data. | |
| 1421 // Note that we do not need to grab the nmethod lock for this, it | |
| 1422 // better be thread safe if we're disposing of it! | |
| 1423 ExceptionCache* ec = exception_cache(); | |
| 1424 set_exception_cache(NULL); | |
| 1425 while(ec != NULL) { | |
| 1426 ExceptionCache* next = ec->next(); | |
| 1427 delete ec; | |
| 1428 ec = next; | |
| 1429 } | |
| 1430 | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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|
1431 if (on_scavenge_root_list()) { |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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|
1432 CodeCache::drop_scavenge_root_nmethod(this); |
|
148e5441d916
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|
1433 } |
|
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|
1434 |
| 1202 | 1435 if (is_speculatively_disconnected()) { |
| 1436 CodeCache::remove_saved_code(this); | |
| 1437 } | |
| 1438 | |
| 1692 | 1439 #ifdef SHARK |
|
1845
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twisti
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1784
diff
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|
1440 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
| 1692 | 1441 #endif // SHARK |
| 1442 | |
| 0 | 1443 ((CodeBlob*)(this))->flush(); |
| 1444 | |
| 1445 CodeCache::free(this); | |
| 1446 } | |
| 1447 | |
| 1448 | |
| 1449 // | |
| 1450 // Notify all classes this nmethod is dependent on that it is no | |
| 1451 // longer dependent. This should only be called in two situations. | |
| 1452 // First, when a nmethod transitions to a zombie all dependents need | |
| 1453 // to be clear. Since zombification happens at a safepoint there's no | |
| 1454 // synchronization issues. The second place is a little more tricky. | |
| 1455 // During phase 1 of mark sweep class unloading may happen and as a | |
| 1456 // result some nmethods may get unloaded. In this case the flushing | |
| 1457 // of dependencies must happen during phase 1 since after GC any | |
| 1458 // dependencies in the unloaded nmethod won't be updated, so | |
| 1459 // traversing the dependency information in unsafe. In that case this | |
| 1460 // function is called with a non-NULL argument and this function only | |
| 1461 // notifies instanceKlasses that are reachable | |
| 1462 | |
| 1463 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
|
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|
1464 assert_locked_or_safepoint(CodeCache_lock); |
| 0 | 1465 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
| 1466 "is_alive is non-NULL if and only if we are called during GC"); | |
| 1467 if (!has_flushed_dependencies()) { | |
| 1468 set_has_flushed_dependencies(); | |
| 1469 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1470 klassOop klass = deps.context_type(); | |
| 1471 if (klass == NULL) continue; // ignore things like evol_method | |
| 1472 | |
| 1473 // During GC the is_alive closure is non-NULL, and is used to | |
| 1474 // determine liveness of dependees that need to be updated. | |
| 1475 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
| 1476 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
| 1477 } | |
| 1478 } | |
| 1479 } | |
| 1480 } | |
| 1481 | |
| 1482 | |
| 1483 // If this oop is not live, the nmethod can be unloaded. | |
| 1484 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
| 1485 OopClosure* keep_alive, | |
| 1486 oop* root, bool unloading_occurred) { | |
| 1487 assert(root != NULL, "just checking"); | |
| 1488 oop obj = *root; | |
| 1489 if (obj == NULL || is_alive->do_object_b(obj)) { | |
| 1490 return false; | |
| 1491 } | |
| 1492 if (obj->is_compiledICHolder()) { | |
| 1493 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
| 1494 if (is_alive->do_object_b( | |
| 1495 cichk_oop->holder_method()->method_holder()) && | |
| 1496 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1497 // The oop should be kept alive | |
| 1498 keep_alive->do_oop(root); | |
| 1499 return false; | |
| 1500 } | |
| 1501 } | |
|
989
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changeset
|
1502 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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|
1503 // simply because one of its constant oops has gone dead. |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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diff
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|
1504 // No actual classes need to be unloaded in order for this to occur. |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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diff
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|
1505 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
| 0 | 1506 make_unloaded(is_alive, obj); |
| 1507 return true; | |
| 1508 } | |
| 1509 | |
| 1510 // ------------------------------------------------------------------ | |
| 1511 // post_compiled_method_load_event | |
| 1512 // new method for install_code() path | |
| 1513 // Transfer information from compilation to jvmti | |
| 1514 void nmethod::post_compiled_method_load_event() { | |
| 1515 | |
| 1516 methodOop moop = method(); | |
| 1517 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
| 1518 moop->klass_name()->bytes(), | |
| 1519 moop->klass_name()->utf8_length(), | |
| 1520 moop->name()->bytes(), | |
| 1521 moop->name()->utf8_length(), | |
| 1522 moop->signature()->bytes(), | |
| 1523 moop->signature()->utf8_length(), | |
| 1748 | 1524 insts_begin(), insts_size()); |
| 0 | 1525 |
|
1616
38e8278318ca
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never
parents:
1602
diff
changeset
|
1526 if (JvmtiExport::should_post_compiled_method_load() || |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
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parents:
1602
diff
changeset
|
1527 JvmtiExport::should_post_compiled_method_unload()) { |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
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parents:
1602
diff
changeset
|
1528 get_and_cache_jmethod_id(); |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1529 } |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
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diff
changeset
|
1530 |
| 0 | 1531 if (JvmtiExport::should_post_compiled_method_load()) { |
|
2195
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
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diff
changeset
|
1532 // Let the Service thread (which is a real Java thread) post the event |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
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|
1533 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
|
bf8517f4e4d0
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|
1534 JvmtiDeferredEventQueue::enqueue( |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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|
1535 JvmtiDeferredEvent::compiled_method_load_event(this)); |
| 0 | 1536 } |
| 1537 } | |
| 1538 | |
|
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1539 jmethodID nmethod::get_and_cache_jmethod_id() { |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1540 if (_jmethod_id == NULL) { |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1541 // Cache the jmethod_id since it can no longer be looked up once the |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1542 // method itself has been marked for unloading. |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1543 _jmethod_id = method()->jmethod_id(); |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1544 } |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1545 return _jmethod_id; |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1546 } |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1547 |
| 0 | 1548 void nmethod::post_compiled_method_unload() { |
|
1577
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1549 if (unload_reported()) { |
|
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1550 // During unloading we transition to unloaded and then to zombie |
|
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1551 // and the unloading is reported during the first transition. |
|
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1552 return; |
|
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1553 } |
|
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1554 |
| 0 | 1555 assert(_method != NULL && !is_unloaded(), "just checking"); |
| 1556 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
| 1557 | |
| 1558 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
|
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1559 // post the event. Sometime later this nmethod will be made a zombie |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1560 // by the sweeper but the methodOop will not be valid at that point. |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1561 // If the _jmethod_id is null then no load event was ever requested |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1562 // so don't bother posting the unload. The main reason for this is |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1563 // that the jmethodID is a weak reference to the methodOop so if |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1564 // it's being unloaded there's no way to look it up since the weak |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1565 // ref will have been cleared. |
|
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1566 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
| 0 | 1567 assert(!unload_reported(), "already unloaded"); |
|
2195
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
diff
changeset
|
1568 JvmtiDeferredEvent event = |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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2177
diff
changeset
|
1569 JvmtiDeferredEvent::compiled_method_unload_event( |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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diff
changeset
|
1570 _jmethod_id, insts_begin()); |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
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changeset
|
1571 if (SafepointSynchronize::is_at_safepoint()) { |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
diff
changeset
|
1572 // Don't want to take the queueing lock. Add it as pending and |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
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diff
changeset
|
1573 // it will get enqueued later. |
|
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
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changeset
|
1574 JvmtiDeferredEventQueue::add_pending_event(event); |
|
bf8517f4e4d0
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kamg
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|
1575 } else { |
|
bf8517f4e4d0
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diff
changeset
|
1576 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
|
bf8517f4e4d0
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diff
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|
1577 JvmtiDeferredEventQueue::enqueue(event); |
|
bf8517f4e4d0
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|
1578 } |
| 0 | 1579 } |
| 1580 | |
| 1581 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
| 1582 // any time. As the nmethod is being unloaded now we mark it has | |
| 1583 // having the unload event reported - this will ensure that we don't | |
| 1584 // attempt to report the event in the unlikely scenario where the | |
| 1585 // event is enabled at the time the nmethod is made a zombie. | |
| 1586 set_unload_reported(); | |
| 1587 } | |
| 1588 | |
| 1589 // This is called at the end of the strong tracing/marking phase of a | |
| 1590 // GC to unload an nmethod if it contains otherwise unreachable | |
| 1591 // oops. | |
| 1592 | |
| 1593 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
| 1594 OopClosure* keep_alive, bool unloading_occurred) { | |
| 1595 // Make sure the oop's ready to receive visitors | |
| 1596 assert(!is_zombie() && !is_unloaded(), | |
| 1597 "should not call follow on zombie or unloaded nmethod"); | |
| 1598 | |
| 1599 // If the method is not entrant then a JMP is plastered over the | |
| 1600 // first few bytes. If an oop in the old code was there, that oop | |
| 1601 // should not get GC'd. Skip the first few bytes of oops on | |
| 1602 // not-entrant methods. | |
| 1603 address low_boundary = verified_entry_point(); | |
| 1604 if (is_not_entrant()) { | |
| 1605 low_boundary += NativeJump::instruction_size; | |
| 1606 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1607 // (See comment above.) | |
| 1608 } | |
| 1609 | |
| 1610 // The RedefineClasses() API can cause the class unloading invariant | |
| 1611 // to no longer be true. See jvmtiExport.hpp for details. | |
| 1612 // Also, leave a debugging breadcrumb in local flag. | |
| 1613 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
| 1614 if (a_class_was_redefined) { | |
| 1615 // This set of the unloading_occurred flag is done before the | |
| 1616 // call to post_compiled_method_unload() so that the unloading | |
| 1617 // of this nmethod is reported. | |
| 1618 unloading_occurred = true; | |
| 1619 } | |
| 1620 | |
| 1621 // Follow methodOop | |
| 1622 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
| 1623 return; | |
| 1624 } | |
| 1625 | |
| 1626 // Exception cache | |
| 1627 ExceptionCache* ec = exception_cache(); | |
| 1628 while (ec != NULL) { | |
| 1629 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
| 1630 oop ex = *ex_addr; | |
| 1631 ExceptionCache* next_ec = ec->next(); | |
| 1632 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
| 1633 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
| 1634 remove_from_exception_cache(ec); | |
| 1635 } | |
| 1636 ec = next_ec; | |
| 1637 } | |
| 1638 | |
| 1639 // If class unloading occurred we first iterate over all inline caches and | |
| 1640 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
| 1641 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
| 1642 // iteration below. | |
| 1643 if (unloading_occurred) { | |
| 1644 RelocIterator iter(this, low_boundary); | |
| 1645 while(iter.next()) { | |
| 1646 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1647 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1648 oop ic_oop = ic->cached_oop(); | |
| 1649 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
| 1650 // The only exception is compiledICHolder oops which may | |
| 1651 // yet be marked below. (We check this further below). | |
| 1652 if (ic_oop->is_compiledICHolder()) { | |
| 1653 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
| 1654 if (is_alive->do_object_b( | |
| 1655 cichk_oop->holder_method()->method_holder()) && | |
| 1656 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
| 1657 continue; | |
| 1658 } | |
| 1659 } | |
| 1660 ic->set_to_clean(); | |
|
1489
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6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
1378
diff
changeset
|
1661 assert(ic->cached_oop() == NULL, |
|
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
1378
diff
changeset
|
1662 "cached oop in IC should be cleared"); |
| 0 | 1663 } |
| 1664 } | |
| 1665 } | |
| 1666 } | |
| 1667 | |
| 1668 // Compiled code | |
| 1669 RelocIterator iter(this, low_boundary); | |
| 1670 while (iter.next()) { | |
| 1671 if (iter.type() == relocInfo::oop_type) { | |
| 1672 oop_Relocation* r = iter.oop_reloc(); | |
| 1673 // In this loop, we must only traverse those oops directly embedded in | |
| 1674 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 1675 assert(1 == (r->oop_is_immediate()) + | |
| 1676 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1677 "oop must be found in exactly one place"); | |
| 1678 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
| 1679 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
| 1680 return; | |
| 1681 } | |
| 1682 } | |
| 1683 } | |
| 1684 } | |
| 1685 | |
| 1686 | |
| 1687 // Scopes | |
| 1688 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
| 1689 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1690 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
| 1691 return; | |
| 1692 } | |
| 1693 } | |
| 1694 | |
| 1695 #ifndef PRODUCT | |
| 1696 // This nmethod was not unloaded; check below that all CompiledICs | |
| 1697 // refer to marked oops. | |
| 1698 { | |
| 1699 RelocIterator iter(this, low_boundary); | |
| 1700 while (iter.next()) { | |
| 1701 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1702 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1703 oop ic_oop = ic->cached_oop(); | |
| 1704 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
| 1705 "Found unmarked ic_oop in reachable nmethod"); | |
| 1706 } | |
| 1707 } | |
| 1708 } | |
| 1709 #endif // !PRODUCT | |
| 1710 } | |
| 1711 | |
| 941 | 1712 // This method is called twice during GC -- once while |
| 1713 // tracing the "active" nmethods on thread stacks during | |
| 1714 // the (strong) marking phase, and then again when walking | |
| 1715 // the code cache contents during the weak roots processing | |
| 1716 // phase. The two uses are distinguished by means of the | |
|
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1717 // 'do_strong_roots_only' flag, which is true in the first |
| 941 | 1718 // case. We want to walk the weak roots in the nmethod |
| 1719 // only in the second case. The weak roots in the nmethod | |
| 1720 // are the oops in the ExceptionCache and the InlineCache | |
| 1721 // oops. | |
|
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1722 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
| 0 | 1723 // make sure the oops ready to receive visitors |
| 1724 assert(!is_zombie() && !is_unloaded(), | |
| 1725 "should not call follow on zombie or unloaded nmethod"); | |
| 1726 | |
| 1727 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1728 // first few bytes. If an oop in the old code was there, that oop | |
| 1729 // should not get GC'd. Skip the first few bytes of oops on | |
| 1730 // not-entrant methods. | |
| 1731 address low_boundary = verified_entry_point(); | |
| 1732 if (is_not_entrant()) { | |
| 1733 low_boundary += NativeJump::instruction_size; | |
| 1734 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1735 // (See comment above.) | |
| 1736 } | |
| 1737 | |
| 1738 // Compiled code | |
| 1739 f->do_oop((oop*) &_method); | |
|
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1740 if (!do_strong_roots_only) { |
| 941 | 1741 // weak roots processing phase -- update ExceptionCache oops |
| 1742 ExceptionCache* ec = exception_cache(); | |
| 1743 while(ec != NULL) { | |
| 1744 f->do_oop((oop*)ec->exception_type_addr()); | |
| 1745 ec = ec->next(); | |
| 1746 } | |
| 1747 } // Else strong roots phase -- skip oops in ExceptionCache | |
| 0 | 1748 |
| 1749 RelocIterator iter(this, low_boundary); | |
| 941 | 1750 |
| 0 | 1751 while (iter.next()) { |
| 1752 if (iter.type() == relocInfo::oop_type ) { | |
| 1753 oop_Relocation* r = iter.oop_reloc(); | |
| 1754 // In this loop, we must only follow those oops directly embedded in | |
| 1755 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 941 | 1756 assert(1 == (r->oop_is_immediate()) + |
| 1757 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1758 "oop must be found in exactly one place"); | |
| 0 | 1759 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
| 1760 f->do_oop(r->oop_addr()); | |
| 1761 } | |
| 1762 } | |
| 1763 } | |
| 1764 | |
| 1765 // Scopes | |
|
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1766 // This includes oop constants not inlined in the code stream. |
| 0 | 1767 for (oop* p = oops_begin(); p < oops_end(); p++) { |
| 1768 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1769 f->do_oop(p); | |
| 1770 } | |
| 1771 } | |
| 1772 | |
|
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1773 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1774 |
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1775 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1776 |
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1777 // An nmethod is "marked" if its _mark_link is set non-null. |
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1778 // Even if it is the end of the linked list, it will have a non-null link value, |
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1779 // as long as it is on the list. |
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1780 // This code must be MP safe, because it is used from parallel GC passes. |
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1781 bool nmethod::test_set_oops_do_mark() { |
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1782 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1783 nmethod* observed_mark_link = _oops_do_mark_link; |
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1784 if (observed_mark_link == NULL) { |
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1785 // Claim this nmethod for this thread to mark. |
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1786 observed_mark_link = (nmethod*) |
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1787 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1788 if (observed_mark_link == NULL) { |
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1789 |
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1790 // Atomically append this nmethod (now claimed) to the head of the list: |
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1791 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1792 for (;;) { |
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1793 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1794 _oops_do_mark_link = required_mark_nmethods; |
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1795 observed_mark_nmethods = (nmethod*) |
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1796 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1797 if (observed_mark_nmethods == required_mark_nmethods) |
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1798 break; |
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1799 } |
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1800 // Mark was clear when we first saw this guy. |
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1801 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1802 return false; |
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1803 } |
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1804 } |
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1805 // On fall through, another racing thread marked this nmethod before we did. |
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1806 return true; |
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1807 } |
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1808 |
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1809 void nmethod::oops_do_marking_prologue() { |
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1810 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1811 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1812 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1813 // may fork a bunch of threads, and we need them all to see the same state. |
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1814 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1815 guarantee(observed == NULL, "no races in this sequential code"); |
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1816 } |
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1817 |
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1818 void nmethod::oops_do_marking_epilogue() { |
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1819 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1820 nmethod* cur = _oops_do_mark_nmethods; |
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1821 while (cur != NMETHOD_SENTINEL) { |
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1822 assert(cur != NULL, "not NULL-terminated"); |
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1823 nmethod* next = cur->_oops_do_mark_link; |
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1824 cur->_oops_do_mark_link = NULL; |
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1825 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1826 cur = next; |
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1827 } |
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1828 void* required = _oops_do_mark_nmethods; |
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1829 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1830 guarantee(observed == required, "no races in this sequential code"); |
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1831 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1832 } |
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1833 |
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1834 class DetectScavengeRoot: public OopClosure { |
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1835 bool _detected_scavenge_root; |
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1836 public: |
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1837 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1838 { NOT_PRODUCT(_print_nm = NULL); } |
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1839 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1840 virtual void do_oop(oop* p) { |
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1841 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1842 NOT_PRODUCT(maybe_print(p)); |
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1843 _detected_scavenge_root = true; |
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1844 } |
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1845 } |
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1846 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1847 |
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1848 #ifndef PRODUCT |
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1849 nmethod* _print_nm; |
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1850 void maybe_print(oop* p) { |
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1851 if (_print_nm == NULL) return; |
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1852 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1853 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1854 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1855 (intptr_t)(*p), (intptr_t)p); |
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1856 (*p)->print(); |
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1857 } |
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1858 #endif //PRODUCT |
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1859 }; |
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1860 |
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1861 bool nmethod::detect_scavenge_root_oops() { |
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1862 DetectScavengeRoot detect_scavenge_root; |
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1863 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1864 oops_do(&detect_scavenge_root); |
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1865 return detect_scavenge_root.detected_scavenge_root(); |
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1866 } |
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1867 |
| 0 | 1868 // Method that knows how to preserve outgoing arguments at call. This method must be |
| 1869 // called with a frame corresponding to a Java invoke | |
| 1870 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
| 1692 | 1871 #ifndef SHARK |
| 0 | 1872 if (!method()->is_native()) { |
| 1873 SimpleScopeDesc ssd(this, fr.pc()); | |
| 2142 | 1874 Bytecode_invoke call(ssd.method(), ssd.bci()); |
| 1875 bool has_receiver = call.has_receiver(); | |
|
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1876 Symbol* signature = call.signature(); |
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1877 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
| 0 | 1878 } |
| 1692 | 1879 #endif // !SHARK |
| 0 | 1880 } |
| 1881 | |
| 1882 | |
| 1883 oop nmethod::embeddedOop_at(u_char* p) { | |
|
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1884 RelocIterator iter(this, p, p + 1); |
| 0 | 1885 while (iter.next()) |
| 1886 if (iter.type() == relocInfo::oop_type) { | |
| 1887 return iter.oop_reloc()->oop_value(); | |
| 1888 } | |
| 1889 return NULL; | |
| 1890 } | |
| 1891 | |
| 1892 | |
| 1893 inline bool includes(void* p, void* from, void* to) { | |
| 1894 return from <= p && p < to; | |
| 1895 } | |
| 1896 | |
| 1897 | |
| 1898 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
| 1899 assert(count >= 2, "must be sentinel values, at least"); | |
| 1900 | |
| 1901 #ifdef ASSERT | |
| 1902 // must be sorted and unique; we do a binary search in find_pc_desc() | |
| 1903 int prev_offset = pcs[0].pc_offset(); | |
| 1904 assert(prev_offset == PcDesc::lower_offset_limit, | |
| 1905 "must start with a sentinel"); | |
| 1906 for (int i = 1; i < count; i++) { | |
| 1907 int this_offset = pcs[i].pc_offset(); | |
| 1908 assert(this_offset > prev_offset, "offsets must be sorted"); | |
| 1909 prev_offset = this_offset; | |
| 1910 } | |
| 1911 assert(prev_offset == PcDesc::upper_offset_limit, | |
| 1912 "must end with a sentinel"); | |
| 1913 #endif //ASSERT | |
| 1914 | |
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1915 // Search for MethodHandle invokes and tag the nmethod. |
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1916 for (int i = 0; i < count; i++) { |
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1917 if (pcs[i].is_method_handle_invoke()) { |
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1918 set_has_method_handle_invokes(true); |
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1919 break; |
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1920 } |
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1921 } |
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1922 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1923 |
| 0 | 1924 int size = count * sizeof(PcDesc); |
| 1925 assert(scopes_pcs_size() >= size, "oob"); | |
| 1926 memcpy(scopes_pcs_begin(), pcs, size); | |
| 1927 | |
| 1928 // Adjust the final sentinel downward. | |
| 1929 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
| 1930 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
| 1748 | 1931 last_pc->set_pc_offset(content_size() + 1); |
| 0 | 1932 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
| 1933 // Fill any rounding gaps with copies of the last record. | |
| 1934 last_pc[1] = last_pc[0]; | |
| 1935 } | |
| 1936 // The following assert could fail if sizeof(PcDesc) is not | |
| 1937 // an integral multiple of oopSize (the rounding term). | |
| 1938 // If it fails, change the logic to always allocate a multiple | |
| 1939 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
| 1940 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
| 1941 } | |
| 1942 | |
| 1943 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
| 1944 assert(scopes_data_size() >= size, "oob"); | |
| 1945 memcpy(scopes_data_begin(), buffer, size); | |
| 1946 } | |
| 1947 | |
| 1948 | |
| 1949 #ifdef ASSERT | |
| 1950 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
| 1951 PcDesc* lower = nm->scopes_pcs_begin(); | |
| 1952 PcDesc* upper = nm->scopes_pcs_end(); | |
| 1953 lower += 1; // exclude initial sentinel | |
| 1954 PcDesc* res = NULL; | |
| 1955 for (PcDesc* p = lower; p < upper; p++) { | |
| 1956 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
| 1957 if (match_desc(p, pc_offset, approximate)) { | |
| 1958 if (res == NULL) | |
| 1959 res = p; | |
| 1960 else | |
| 1961 res = (PcDesc*) badAddress; | |
| 1962 } | |
| 1963 } | |
| 1964 return res; | |
| 1965 } | |
| 1966 #endif | |
| 1967 | |
| 1968 | |
| 1969 // Finds a PcDesc with real-pc equal to "pc" | |
| 1970 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
| 1748 | 1971 address base_address = code_begin(); |
| 0 | 1972 if ((pc < base_address) || |
| 1973 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
| 1974 return NULL; // PC is wildly out of range | |
| 1975 } | |
| 1976 int pc_offset = (int) (pc - base_address); | |
| 1977 | |
| 1978 // Check the PcDesc cache if it contains the desired PcDesc | |
| 1979 // (This as an almost 100% hit rate.) | |
| 1980 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
| 1981 if (res != NULL) { | |
| 1982 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
| 1983 return res; | |
| 1984 } | |
| 1985 | |
| 1986 // Fallback algorithm: quasi-linear search for the PcDesc | |
| 1987 // Find the last pc_offset less than the given offset. | |
| 1988 // The successor must be the required match, if there is a match at all. | |
| 1989 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
| 1990 PcDesc* lower = scopes_pcs_begin(); | |
| 1991 PcDesc* upper = scopes_pcs_end(); | |
| 1992 upper -= 1; // exclude final sentinel | |
| 1993 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
| 1994 | |
| 1995 #define assert_LU_OK \ | |
| 1996 /* invariant on lower..upper during the following search: */ \ | |
| 1997 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
| 1998 assert(upper->pc_offset() >= pc_offset, "sanity") | |
| 1999 assert_LU_OK; | |
| 2000 | |
| 2001 // Use the last successful return as a split point. | |
| 2002 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
| 2003 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 2004 if (mid->pc_offset() < pc_offset) { | |
| 2005 lower = mid; | |
| 2006 } else { | |
| 2007 upper = mid; | |
| 2008 } | |
| 2009 | |
| 2010 // Take giant steps at first (4096, then 256, then 16, then 1) | |
| 2011 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
| 2012 const int RADIX = (1 << LOG2_RADIX); | |
| 2013 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
| 2014 while ((mid = lower + step) < upper) { | |
| 2015 assert_LU_OK; | |
| 2016 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 2017 if (mid->pc_offset() < pc_offset) { | |
| 2018 lower = mid; | |
| 2019 } else { | |
| 2020 upper = mid; | |
| 2021 break; | |
| 2022 } | |
| 2023 } | |
| 2024 assert_LU_OK; | |
| 2025 } | |
| 2026 | |
| 2027 // Sneak up on the value with a linear search of length ~16. | |
| 2028 while (true) { | |
| 2029 assert_LU_OK; | |
| 2030 mid = lower + 1; | |
| 2031 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 2032 if (mid->pc_offset() < pc_offset) { | |
| 2033 lower = mid; | |
| 2034 } else { | |
| 2035 upper = mid; | |
| 2036 break; | |
| 2037 } | |
| 2038 } | |
| 2039 #undef assert_LU_OK | |
| 2040 | |
| 2041 if (match_desc(upper, pc_offset, approximate)) { | |
| 2042 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
| 2043 _pc_desc_cache.add_pc_desc(upper); | |
| 2044 return upper; | |
| 2045 } else { | |
| 2046 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
| 2047 return NULL; | |
| 2048 } | |
| 2049 } | |
| 2050 | |
| 2051 | |
| 2052 bool nmethod::check_all_dependencies() { | |
| 2053 bool found_check = false; | |
| 2054 // wholesale check of all dependencies | |
| 2055 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2056 if (deps.check_dependency() != NULL) { | |
| 2057 found_check = true; | |
| 2058 NOT_DEBUG(break); | |
| 2059 } | |
| 2060 } | |
| 2061 return found_check; // tell caller if we found anything | |
| 2062 } | |
| 2063 | |
| 2064 bool nmethod::check_dependency_on(DepChange& changes) { | |
| 2065 // What has happened: | |
| 2066 // 1) a new class dependee has been added | |
| 2067 // 2) dependee and all its super classes have been marked | |
| 2068 bool found_check = false; // set true if we are upset | |
| 2069 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2070 // Evaluate only relevant dependencies. | |
| 2071 if (deps.spot_check_dependency_at(changes) != NULL) { | |
| 2072 found_check = true; | |
| 2073 NOT_DEBUG(break); | |
| 2074 } | |
| 2075 } | |
| 2076 return found_check; | |
| 2077 } | |
| 2078 | |
| 2079 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
| 2080 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
| 2081 objArrayOop dependee_methods = dependee_ik->methods(); | |
| 2082 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2083 if (deps.type() == Dependencies::evol_method) { | |
| 2084 methodOop method = deps.method_argument(0); | |
| 2085 for (int j = 0; j < dependee_methods->length(); j++) { | |
| 2086 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
| 2087 // RC_TRACE macro has an embedded ResourceMark | |
| 2088 RC_TRACE(0x01000000, | |
| 2089 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
| 2090 _method->method_holder()->klass_part()->external_name(), | |
| 2091 _method->name()->as_C_string(), | |
| 2092 _method->signature()->as_C_string(), compile_id(), | |
| 2093 method->method_holder()->klass_part()->external_name(), | |
| 2094 method->name()->as_C_string(), | |
| 2095 method->signature()->as_C_string())); | |
| 2096 if (TraceDependencies || LogCompilation) | |
| 2097 deps.log_dependency(dependee); | |
| 2098 return true; | |
| 2099 } | |
| 2100 } | |
| 2101 } | |
| 2102 } | |
| 2103 return false; | |
| 2104 } | |
| 2105 | |
| 2106 // Called from mark_for_deoptimization, when dependee is invalidated. | |
| 2107 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
| 2108 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2109 if (deps.type() != Dependencies::evol_method) | |
| 2110 continue; | |
| 2111 methodOop method = deps.method_argument(0); | |
| 2112 if (method == dependee) return true; | |
| 2113 } | |
| 2114 return false; | |
| 2115 } | |
| 2116 | |
| 2117 | |
| 2118 bool nmethod::is_patchable_at(address instr_addr) { | |
| 1748 | 2119 assert(insts_contains(instr_addr), "wrong nmethod used"); |
| 0 | 2120 if (is_zombie()) { |
| 2121 // a zombie may never be patched | |
| 2122 return false; | |
| 2123 } | |
| 2124 return true; | |
| 2125 } | |
| 2126 | |
| 2127 | |
| 2128 address nmethod::continuation_for_implicit_exception(address pc) { | |
| 2129 // Exception happened outside inline-cache check code => we are inside | |
| 2130 // an active nmethod => use cpc to determine a return address | |
| 1748 | 2131 int exception_offset = pc - code_begin(); |
| 0 | 2132 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
| 2133 #ifdef ASSERT | |
| 2134 if (cont_offset == 0) { | |
| 2135 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
| 2136 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
| 2137 HandleMark hm(thread); | |
| 2138 ResourceMark rm(thread); | |
| 2139 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2140 assert(cb != NULL && cb == this, ""); | |
| 2141 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
| 2142 print(); | |
| 2143 method()->print_codes(); | |
| 2144 print_code(); | |
| 2145 print_pcs(); | |
| 2146 } | |
| 2147 #endif | |
| 1250 | 2148 if (cont_offset == 0) { |
| 2149 // Let the normal error handling report the exception | |
| 2150 return NULL; | |
| 2151 } | |
| 1748 | 2152 return code_begin() + cont_offset; |
| 0 | 2153 } |
| 2154 | |
| 2155 | |
| 2156 | |
| 2157 void nmethod_init() { | |
| 2158 // make sure you didn't forget to adjust the filler fields | |
| 2159 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
| 2160 } | |
| 2161 | |
| 2162 | |
| 2163 //------------------------------------------------------------------------------------------- | |
| 2164 | |
| 2165 | |
| 2166 // QQQ might we make this work from a frame?? | |
| 2167 nmethodLocker::nmethodLocker(address pc) { | |
| 2168 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2169 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
| 2170 _nm = (nmethod*)cb; | |
| 2171 lock_nmethod(_nm); | |
| 2172 } | |
| 2173 | |
| 2174 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
| 2175 if (nm == NULL) return; | |
| 2176 Atomic::inc(&nm->_lock_count); | |
| 2177 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
| 2178 } | |
| 2179 | |
| 2180 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
| 2181 if (nm == NULL) return; | |
| 2182 Atomic::dec(&nm->_lock_count); | |
| 2183 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
| 2184 } | |
| 2185 | |
| 1204 | 2186 |
| 2187 // ----------------------------------------------------------------------------- | |
| 2188 // nmethod::get_deopt_original_pc | |
| 2189 // | |
| 2190 // Return the original PC for the given PC if: | |
| 2191 // (a) the given PC belongs to a nmethod and | |
| 2192 // (b) it is a deopt PC | |
| 2193 address nmethod::get_deopt_original_pc(const frame* fr) { | |
| 2194 if (fr->cb() == NULL) return NULL; | |
| 2195 | |
| 2196 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
| 2197 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
| 2198 return nm->get_original_pc(fr); | |
| 2199 | |
| 2200 return NULL; | |
| 0 | 2201 } |
| 2202 | |
| 2203 | |
| 2204 // ----------------------------------------------------------------------------- | |
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2205 // MethodHandle |
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2206 |
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2207 bool nmethod::is_method_handle_return(address return_pc) { |
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2208 if (!has_method_handle_invokes()) return false; |
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2209 PcDesc* pd = pc_desc_at(return_pc); |
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2210 if (pd == NULL) |
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2211 return false; |
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2212 return pd->is_method_handle_invoke(); |
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2213 } |
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2214 |
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2215 |
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2216 // ----------------------------------------------------------------------------- |
| 0 | 2217 // Verification |
| 2218 | |
|
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2219 class VerifyOopsClosure: public OopClosure { |
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2220 nmethod* _nm; |
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2221 bool _ok; |
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2222 public: |
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2223 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2224 bool ok() { return _ok; } |
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2225 virtual void do_oop(oop* p) { |
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2226 if ((*p) == NULL || (*p)->is_oop()) return; |
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2227 if (_ok) { |
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2228 _nm->print_nmethod(true); |
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2229 _ok = false; |
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2230 } |
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2231 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2232 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2233 } |
|
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2234 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2235 }; |
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2236 |
| 0 | 2237 void nmethod::verify() { |
| 2238 | |
| 2239 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
| 2240 // seems odd. | |
| 2241 | |
| 2242 if( is_zombie() || is_not_entrant() ) | |
| 2243 return; | |
| 2244 | |
| 2245 // Make sure all the entry points are correctly aligned for patching. | |
| 2246 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
| 2247 | |
| 2248 assert(method()->is_oop(), "must be valid"); | |
| 2249 | |
| 2250 ResourceMark rm; | |
| 2251 | |
| 2252 if (!CodeCache::contains(this)) { | |
|
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2253 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
| 0 | 2254 } |
| 2255 | |
| 2256 if(is_native_method() ) | |
| 2257 return; | |
| 2258 | |
| 2259 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
| 2260 if (nm != this) { | |
|
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2261 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2262 this)); |
| 0 | 2263 } |
| 2264 | |
| 2265 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2266 if (! p->verify(this)) { | |
| 2267 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
| 2268 } | |
| 2269 } | |
| 2270 | |
|
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2271 VerifyOopsClosure voc(this); |
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2272 oops_do(&voc); |
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2273 assert(voc.ok(), "embedded oops must be OK"); |
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2274 verify_scavenge_root_oops(); |
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2275 |
| 0 | 2276 verify_scopes(); |
| 2277 } | |
| 2278 | |
| 2279 | |
| 2280 void nmethod::verify_interrupt_point(address call_site) { | |
| 2281 // This code does not work in release mode since | |
| 2282 // owns_lock only is available in debug mode. | |
| 2283 CompiledIC* ic = NULL; | |
| 2284 Thread *cur = Thread::current(); | |
| 2285 if (CompiledIC_lock->owner() == cur || | |
| 2286 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
| 2287 SafepointSynchronize::is_at_safepoint())) { | |
| 2288 ic = CompiledIC_at(call_site); | |
| 2289 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 2290 } else { | |
| 2291 MutexLocker ml_verify (CompiledIC_lock); | |
| 2292 ic = CompiledIC_at(call_site); | |
| 2293 } | |
| 2294 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
| 2295 assert(pd != NULL, "PcDesc must exist"); | |
| 2296 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
|
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2297 pd->obj_decode_offset(), pd->should_reexecute(), |
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2298 pd->return_oop()); |
| 0 | 2299 !sd->is_top(); sd = sd->sender()) { |
| 2300 sd->verify(); | |
| 2301 } | |
| 2302 } | |
| 2303 | |
| 2304 void nmethod::verify_scopes() { | |
| 2305 if( !method() ) return; // Runtime stubs have no scope | |
| 2306 if (method()->is_native()) return; // Ignore stub methods. | |
| 2307 // iterate through all interrupt point | |
| 2308 // and verify the debug information is valid. | |
| 2309 RelocIterator iter((nmethod*)this); | |
| 2310 while (iter.next()) { | |
| 2311 address stub = NULL; | |
| 2312 switch (iter.type()) { | |
| 2313 case relocInfo::virtual_call_type: | |
| 2314 verify_interrupt_point(iter.addr()); | |
| 2315 break; | |
| 2316 case relocInfo::opt_virtual_call_type: | |
| 2317 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
| 2318 verify_interrupt_point(iter.addr()); | |
| 2319 break; | |
| 2320 case relocInfo::static_call_type: | |
| 2321 stub = iter.static_call_reloc()->static_stub(); | |
| 2322 //verify_interrupt_point(iter.addr()); | |
| 2323 break; | |
| 2324 case relocInfo::runtime_call_type: | |
| 2325 address destination = iter.reloc()->value(); | |
| 2326 // Right now there is no way to find out which entries support | |
| 2327 // an interrupt point. It would be nice if we had this | |
| 2328 // information in a table. | |
| 2329 break; | |
| 2330 } | |
| 2331 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
| 2332 } | |
| 2333 } | |
| 2334 | |
| 2335 | |
| 2336 // ----------------------------------------------------------------------------- | |
| 2337 // Non-product code | |
| 2338 #ifndef PRODUCT | |
| 2339 | |
|
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2340 class DebugScavengeRoot: public OopClosure { |
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2341 nmethod* _nm; |
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2342 bool _ok; |
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2343 public: |
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2344 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2345 bool ok() { return _ok; } |
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2346 virtual void do_oop(oop* p) { |
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2347 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2348 if (_ok) { |
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2349 _nm->print_nmethod(true); |
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2350 _ok = false; |
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|
2351 } |
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|
2352 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
|
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2353 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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|
2354 (*p)->print(); |
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|
2355 } |
|
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|
2356 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
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|
2357 }; |
| 0 | 2358 |
|
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2359 void nmethod::verify_scavenge_root_oops() { |
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2360 if (!on_scavenge_root_list()) { |
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2361 // Actually look inside, to verify the claim that it's clean. |
|
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|
2362 DebugScavengeRoot debug_scavenge_root(this); |
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2363 oops_do(&debug_scavenge_root); |
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2364 if (!debug_scavenge_root.ok()) |
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2365 fatal("found an unadvertised bad non-perm oop in the code cache"); |
| 0 | 2366 } |
|
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2367 assert(scavenge_root_not_marked(), ""); |
| 0 | 2368 } |
| 2369 | |
|
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2370 #endif // PRODUCT |
| 0 | 2371 |
| 2372 // Printing operations | |
| 2373 | |
| 2374 void nmethod::print() const { | |
| 2375 ResourceMark rm; | |
| 2376 ttyLocker ttyl; // keep the following output all in one block | |
| 2377 | |
| 2378 tty->print("Compiled "); | |
| 2379 | |
| 2380 if (is_compiled_by_c1()) { | |
| 2381 tty->print("(c1) "); | |
| 2382 } else if (is_compiled_by_c2()) { | |
| 2383 tty->print("(c2) "); | |
| 1692 | 2384 } else if (is_compiled_by_shark()) { |
| 2385 tty->print("(shark) "); | |
| 0 | 2386 } else { |
| 2387 tty->print("(nm) "); | |
| 2388 } | |
| 2389 | |
| 2390 print_on(tty, "nmethod"); | |
| 2391 tty->cr(); | |
| 2392 if (WizardMode) { | |
| 2393 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
| 2394 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
| 2395 tty->print(" { "); | |
| 2396 if (is_in_use()) tty->print("in_use "); | |
| 2397 if (is_not_entrant()) tty->print("not_entrant "); | |
| 2398 if (is_zombie()) tty->print("zombie "); | |
| 2399 if (is_unloaded()) tty->print("unloaded "); | |
|
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|
2400 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
| 0 | 2401 tty->print_cr("}:"); |
| 2402 } | |
| 2403 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2404 (address)this, | |
| 2405 (address)this + size(), | |
| 2406 size()); | |
| 2407 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2408 relocation_begin(), | |
| 2409 relocation_end(), | |
| 2410 relocation_size()); | |
|
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|
2411 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
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|
2412 consts_begin(), |
|
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|
2413 consts_end(), |
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|
2414 consts_size()); |
| 1748 | 2415 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| 2416 insts_begin(), | |
| 2417 insts_end(), | |
| 2418 insts_size()); | |
| 0 | 2419 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| 2420 stub_begin(), | |
| 2421 stub_end(), | |
| 2422 stub_size()); | |
|
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2423 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
|
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|
2424 oops_begin(), |
|
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2425 oops_end(), |
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|
2426 oops_size()); |
| 0 | 2427 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
| 2428 scopes_data_begin(), | |
| 2429 scopes_data_end(), | |
| 2430 scopes_data_size()); | |
| 2431 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2432 scopes_pcs_begin(), | |
| 2433 scopes_pcs_end(), | |
| 2434 scopes_pcs_size()); | |
| 2435 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2436 dependencies_begin(), | |
| 2437 dependencies_end(), | |
| 2438 dependencies_size()); | |
| 2439 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2440 handler_table_begin(), | |
| 2441 handler_table_end(), | |
| 2442 handler_table_size()); | |
| 2443 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2444 nul_chk_table_begin(), | |
| 2445 nul_chk_table_end(), | |
| 2446 nul_chk_table_size()); | |
| 2447 } | |
| 2448 | |
|
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2449 void nmethod::print_code() { |
|
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|
2450 HandleMark hm; |
|
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2451 ResourceMark m; |
|
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2452 Disassembler::decode(this); |
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2453 } |
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2454 |
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2455 |
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2456 #ifndef PRODUCT |
| 0 | 2457 |
| 2458 void nmethod::print_scopes() { | |
| 2459 // Find the first pc desc for all scopes in the code and print it. | |
| 2460 ResourceMark rm; | |
| 2461 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2462 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
| 2463 continue; | |
| 2464 | |
| 2465 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
| 2466 sd->print_on(tty, p); | |
| 2467 } | |
| 2468 } | |
| 2469 | |
| 2470 void nmethod::print_dependencies() { | |
| 2471 ResourceMark rm; | |
| 2472 ttyLocker ttyl; // keep the following output all in one block | |
| 2473 tty->print_cr("Dependencies:"); | |
| 2474 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2475 deps.print_dependency(); | |
| 2476 klassOop ctxk = deps.context_type(); | |
| 2477 if (ctxk != NULL) { | |
| 2478 Klass* k = Klass::cast(ctxk); | |
| 2479 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
| 30 | 2480 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
| 0 | 2481 } |
| 2482 } | |
| 2483 deps.log_dependency(); // put it into the xml log also | |
| 2484 } | |
| 2485 } | |
| 2486 | |
| 2487 | |
| 2488 void nmethod::print_relocations() { | |
| 2489 ResourceMark m; // in case methods get printed via the debugger | |
| 2490 tty->print_cr("relocations:"); | |
| 2491 RelocIterator iter(this); | |
| 2492 iter.print(); | |
| 2493 if (UseRelocIndex) { | |
| 2494 jint* index_end = (jint*)relocation_end() - 1; | |
| 2495 jint index_size = *index_end; | |
| 2496 jint* index_start = (jint*)( (address)index_end - index_size ); | |
| 2497 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
| 2498 if (index_size > 0) { | |
| 2499 jint* ip; | |
| 2500 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
| 2501 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
| 2502 ip[0], | |
| 2503 ip[1], | |
| 2504 header_end()+ip[0], | |
| 2505 relocation_begin()-1+ip[1]); | |
| 2506 for (; ip < index_end; ip++) | |
| 2507 tty->print_cr(" (%d ?)", ip[0]); | |
| 2508 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
| 2509 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
| 2510 } | |
| 2511 } | |
| 2512 } | |
| 2513 | |
| 2514 | |
| 2515 void nmethod::print_pcs() { | |
| 2516 ResourceMark m; // in case methods get printed via debugger | |
| 2517 tty->print_cr("pc-bytecode offsets:"); | |
| 2518 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2519 p->print(this); | |
| 2520 } | |
| 2521 } | |
| 2522 | |
|
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2523 #endif // PRODUCT |
| 0 | 2524 |
| 2525 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
| 2526 RelocIterator iter(this, begin, end); | |
| 2527 bool have_one = false; | |
| 2528 while (iter.next()) { | |
| 2529 have_one = true; | |
| 2530 switch (iter.type()) { | |
| 2531 case relocInfo::none: return "no_reloc"; | |
| 2532 case relocInfo::oop_type: { | |
| 2533 stringStream st; | |
| 2534 oop_Relocation* r = iter.oop_reloc(); | |
| 2535 oop obj = r->oop_value(); | |
| 2536 st.print("oop("); | |
| 2537 if (obj == NULL) st.print("NULL"); | |
| 2538 else obj->print_value_on(&st); | |
| 2539 st.print(")"); | |
| 2540 return st.as_string(); | |
| 2541 } | |
| 2542 case relocInfo::virtual_call_type: return "virtual_call"; | |
| 2543 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
| 2544 case relocInfo::static_call_type: return "static_call"; | |
| 2545 case relocInfo::static_stub_type: return "static_stub"; | |
| 2546 case relocInfo::runtime_call_type: return "runtime_call"; | |
| 2547 case relocInfo::external_word_type: return "external_word"; | |
| 2548 case relocInfo::internal_word_type: return "internal_word"; | |
| 2549 case relocInfo::section_word_type: return "section_word"; | |
| 2550 case relocInfo::poll_type: return "poll"; | |
| 2551 case relocInfo::poll_return_type: return "poll_return"; | |
| 2552 case relocInfo::type_mask: return "type_bit_mask"; | |
| 2553 } | |
| 2554 } | |
| 2555 return have_one ? "other" : NULL; | |
| 2556 } | |
| 2557 | |
| 2558 // Return a the last scope in (begin..end] | |
| 2559 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
| 2560 PcDesc* p = pc_desc_near(begin+1); | |
| 2561 if (p != NULL && p->real_pc(this) <= end) { | |
| 2562 return new ScopeDesc(this, p->scope_decode_offset(), | |
|
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2563 p->obj_decode_offset(), p->should_reexecute(), |
|
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2564 p->return_oop()); |
| 0 | 2565 } |
| 2566 return NULL; | |
| 2567 } | |
| 2568 | |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2569 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2570 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2571 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2572 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2573 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
| 1204 | 2574 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
|
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2575 |
|
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2576 if (has_method_handle_invokes()) |
|
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2577 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
|
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2578 |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2579 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
|
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2580 |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2581 if (block_begin == entry_point()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2582 methodHandle m = method(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2583 if (m.not_null()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2584 stream->print(" # "); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2585 m->print_value_on(stream); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2586 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2587 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2588 if (m.not_null() && !is_osr_method()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2589 ResourceMark rm; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2590 int sizeargs = m->size_of_parameters(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2591 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2592 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2593 { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2594 int sig_index = 0; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2595 if (!m->is_static()) |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2596 sig_bt[sig_index++] = T_OBJECT; // 'this' |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2597 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2598 BasicType t = ss.type(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2599 sig_bt[sig_index++] = t; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2600 if (type2size[t] == 2) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2601 sig_bt[sig_index++] = T_VOID; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2602 } else { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2603 assert(type2size[t] == 1, "size is 1 or 2"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2604 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2605 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2606 assert(sig_index == sizeargs, ""); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2607 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2608 const char* spname = "sp"; // make arch-specific? |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2609 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2610 int stack_slot_offset = this->frame_size() * wordSize; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2611 int tab1 = 14, tab2 = 24; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2612 int sig_index = 0; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2613 int arg_index = (m->is_static() ? 0 : -1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2614 bool did_old_sp = false; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2615 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2616 bool at_this = (arg_index == -1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2617 bool at_old_sp = false; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2618 BasicType t = (at_this ? T_OBJECT : ss.type()); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2619 assert(t == sig_bt[sig_index], "sigs in sync"); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2620 if (at_this) |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2621 stream->print(" # this: "); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2622 else |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2623 stream->print(" # parm%d: ", arg_index); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2624 stream->move_to(tab1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2625 VMReg fst = regs[sig_index].first(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2626 VMReg snd = regs[sig_index].second(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2627 if (fst->is_reg()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2628 stream->print("%s", fst->name()); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2629 if (snd->is_valid()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2630 stream->print(":%s", snd->name()); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2631 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2632 } else if (fst->is_stack()) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2633 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2634 if (offset == stack_slot_offset) at_old_sp = true; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2635 stream->print("[%s+0x%x]", spname, offset); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2636 } else { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2637 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2638 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2639 stream->print(" "); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2640 stream->move_to(tab2); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2641 stream->print("= "); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2642 if (at_this) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2643 m->method_holder()->print_value_on(stream); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2644 } else { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2645 bool did_name = false; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2646 if (!at_this && ss.is_object()) { |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2647 Symbol* name = ss.as_symbol_or_null(); |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2648 if (name != NULL) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2649 name->print_value_on(stream); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2650 did_name = true; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2651 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2652 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2653 if (!did_name) |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2654 stream->print("%s", type2name(t)); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2655 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2656 if (at_old_sp) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2657 stream->print(" (%s of caller)", spname); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2658 did_old_sp = true; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2659 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2660 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2661 sig_index += type2size[t]; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2662 arg_index += 1; |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2663 if (!at_this) ss.next(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2664 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2665 if (!did_old_sp) { |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2666 stream->print(" # "); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2667 stream->move_to(tab1); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2668 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2669 stream->print(" (%s of caller)", spname); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2670 stream->cr(); |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2671 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2672 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2673 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2674 } |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2675 |
| 0 | 2676 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
| 2677 // First, find an oopmap in (begin, end]. | |
| 2678 // We use the odd half-closed interval so that oop maps and scope descs | |
| 2679 // which are tied to the byte after a call are printed with the call itself. | |
| 1748 | 2680 address base = code_begin(); |
| 0 | 2681 OopMapSet* oms = oop_maps(); |
| 2682 if (oms != NULL) { | |
| 2683 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
| 2684 OopMap* om = oms->at(i); | |
| 2685 address pc = base + om->offset(); | |
| 2686 if (pc > begin) { | |
| 2687 if (pc <= end) { | |
|
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2688 st->move_to(column); |
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2689 st->print("; "); |
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2690 om->print_on(st); |
| 0 | 2691 } |
| 2692 break; | |
| 2693 } | |
| 2694 } | |
| 2695 } | |
|
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2696 |
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2697 // Print any debug info present at this pc. |
| 0 | 2698 ScopeDesc* sd = scope_desc_in(begin, end); |
| 2699 if (sd != NULL) { | |
|
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2700 st->move_to(column); |
| 0 | 2701 if (sd->bci() == SynchronizationEntryBCI) { |
| 2702 st->print(";*synchronization entry"); | |
| 2703 } else { | |
| 2704 if (sd->method().is_null()) { | |
|
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2705 st->print("method is NULL"); |
| 0 | 2706 } else if (sd->method()->is_native()) { |
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2707 st->print("method is native"); |
| 0 | 2708 } else { |
| 2142 | 2709 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
| 0 | 2710 st->print(";*%s", Bytecodes::name(bc)); |
| 2711 switch (bc) { | |
| 2712 case Bytecodes::_invokevirtual: | |
| 2713 case Bytecodes::_invokespecial: | |
| 2714 case Bytecodes::_invokestatic: | |
| 2715 case Bytecodes::_invokeinterface: | |
| 2716 { | |
| 2142 | 2717 Bytecode_invoke invoke(sd->method(), sd->bci()); |
| 0 | 2718 st->print(" "); |
| 2142 | 2719 if (invoke.name() != NULL) |
| 2720 invoke.name()->print_symbol_on(st); | |
| 0 | 2721 else |
| 2722 st->print("<UNKNOWN>"); | |
| 2723 break; | |
| 2724 } | |
| 2725 case Bytecodes::_getfield: | |
| 2726 case Bytecodes::_putfield: | |
| 2727 case Bytecodes::_getstatic: | |
| 2728 case Bytecodes::_putstatic: | |
| 2729 { | |
| 2142 | 2730 Bytecode_field field(sd->method(), sd->bci()); |
| 0 | 2731 st->print(" "); |
| 2142 | 2732 if (field.name() != NULL) |
| 2733 field.name()->print_symbol_on(st); | |
| 0 | 2734 else |
| 2735 st->print("<UNKNOWN>"); | |
| 2736 } | |
| 2737 } | |
| 2738 } | |
| 2739 } | |
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2740 |
| 0 | 2741 // Print all scopes |
| 2742 for (;sd != NULL; sd = sd->sender()) { | |
|
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2743 st->move_to(column); |
| 0 | 2744 st->print("; -"); |
| 2745 if (sd->method().is_null()) { | |
|
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2746 st->print("method is NULL"); |
| 0 | 2747 } else { |
| 2748 sd->method()->print_short_name(st); | |
| 2749 } | |
| 2750 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
| 2751 if (lineno != -1) { | |
| 2752 st->print("@%d (line %d)", sd->bci(), lineno); | |
| 2753 } else { | |
| 2754 st->print("@%d", sd->bci()); | |
| 2755 } | |
| 2756 st->cr(); | |
| 2757 } | |
| 2758 } | |
| 2759 | |
| 2760 // Print relocation information | |
| 2761 const char* str = reloc_string_for(begin, end); | |
| 2762 if (str != NULL) { | |
| 2763 if (sd != NULL) st->cr(); | |
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2764 st->move_to(column); |
| 0 | 2765 st->print("; {%s}", str); |
| 2766 } | |
| 1748 | 2767 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
| 0 | 2768 if (cont_offset != 0) { |
|
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2769 st->move_to(column); |
| 1748 | 2770 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
| 0 | 2771 } |
| 2772 | |
| 2773 } | |
| 2774 | |
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2775 #ifndef PRODUCT |
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2776 |
| 0 | 2777 void nmethod::print_value_on(outputStream* st) const { |
| 2778 print_on(st, "nmethod"); | |
| 2779 } | |
| 2780 | |
| 2781 void nmethod::print_calls(outputStream* st) { | |
| 2782 RelocIterator iter(this); | |
| 2783 while (iter.next()) { | |
| 2784 switch (iter.type()) { | |
| 2785 case relocInfo::virtual_call_type: | |
| 2786 case relocInfo::opt_virtual_call_type: { | |
| 2787 VerifyMutexLocker mc(CompiledIC_lock); | |
| 2788 CompiledIC_at(iter.reloc())->print(); | |
| 2789 break; | |
| 2790 } | |
| 2791 case relocInfo::static_call_type: | |
| 2792 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
| 2793 compiledStaticCall_at(iter.reloc())->print(); | |
| 2794 break; | |
| 2795 } | |
| 2796 } | |
| 2797 } | |
| 2798 | |
| 2799 void nmethod::print_handler_table() { | |
| 2800 ExceptionHandlerTable(this).print(); | |
| 2801 } | |
| 2802 | |
| 2803 void nmethod::print_nul_chk_table() { | |
| 1748 | 2804 ImplicitExceptionTable(this).print(code_begin()); |
| 0 | 2805 } |
| 2806 | |
| 2807 void nmethod::print_statistics() { | |
| 2808 ttyLocker ttyl; | |
| 2809 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
| 2810 nmethod_stats.print_native_nmethod_stats(); | |
| 2811 nmethod_stats.print_nmethod_stats(); | |
| 2812 DebugInformationRecorder::print_statistics(); | |
| 2813 nmethod_stats.print_pc_stats(); | |
| 2814 Dependencies::print_statistics(); | |
| 2815 if (xtty != NULL) xtty->tail("statistics"); | |
| 2816 } | |
| 2817 | |
| 2818 #endif // PRODUCT |