Fri, 27 Feb 2009 13:27:09 -0800
6810672: Comment typos
Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never
duke@435 | 1 | /* |
xdono@631 | 2 | * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | # include "incls/_precompiled.incl" |
duke@435 | 26 | # include "incls/_nmethod.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | #ifdef DTRACE_ENABLED |
duke@435 | 29 | |
duke@435 | 30 | // Only bother with this argument setup if dtrace is available |
duke@435 | 31 | |
duke@435 | 32 | HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
duke@435 | 33 | const char*, int, const char*, int, const char*, int, void*, size_t); |
duke@435 | 34 | |
duke@435 | 35 | HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, |
duke@435 | 36 | char*, int, char*, int, char*, int); |
duke@435 | 37 | |
duke@435 | 38 | #define DTRACE_METHOD_UNLOAD_PROBE(method) \ |
duke@435 | 39 | { \ |
duke@435 | 40 | methodOop m = (method); \ |
duke@435 | 41 | if (m != NULL) { \ |
duke@435 | 42 | symbolOop klass_name = m->klass_name(); \ |
duke@435 | 43 | symbolOop name = m->name(); \ |
duke@435 | 44 | symbolOop signature = m->signature(); \ |
duke@435 | 45 | HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
duke@435 | 46 | klass_name->bytes(), klass_name->utf8_length(), \ |
duke@435 | 47 | name->bytes(), name->utf8_length(), \ |
duke@435 | 48 | signature->bytes(), signature->utf8_length()); \ |
duke@435 | 49 | } \ |
duke@435 | 50 | } |
duke@435 | 51 | |
duke@435 | 52 | #else // ndef DTRACE_ENABLED |
duke@435 | 53 | |
duke@435 | 54 | #define DTRACE_METHOD_UNLOAD_PROBE(method) |
duke@435 | 55 | |
duke@435 | 56 | #endif |
duke@435 | 57 | |
duke@435 | 58 | bool nmethod::is_compiled_by_c1() const { |
duke@435 | 59 | if (is_native_method()) return false; |
duke@435 | 60 | assert(compiler() != NULL, "must be"); |
duke@435 | 61 | return compiler()->is_c1(); |
duke@435 | 62 | } |
duke@435 | 63 | bool nmethod::is_compiled_by_c2() const { |
duke@435 | 64 | if (is_native_method()) return false; |
duke@435 | 65 | assert(compiler() != NULL, "must be"); |
duke@435 | 66 | return compiler()->is_c2(); |
duke@435 | 67 | } |
duke@435 | 68 | |
duke@435 | 69 | |
duke@435 | 70 | |
duke@435 | 71 | //--------------------------------------------------------------------------------- |
duke@435 | 72 | // NMethod statistics |
duke@435 | 73 | // They are printed under various flags, including: |
duke@435 | 74 | // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. |
duke@435 | 75 | // (In the latter two cases, they like other stats are printed to the log only.) |
duke@435 | 76 | |
duke@435 | 77 | #ifndef PRODUCT |
duke@435 | 78 | // These variables are put into one block to reduce relocations |
duke@435 | 79 | // and make it simpler to print from the debugger. |
duke@435 | 80 | static |
duke@435 | 81 | struct nmethod_stats_struct { |
duke@435 | 82 | int nmethod_count; |
duke@435 | 83 | int total_size; |
duke@435 | 84 | int relocation_size; |
duke@435 | 85 | int code_size; |
duke@435 | 86 | int stub_size; |
duke@435 | 87 | int consts_size; |
duke@435 | 88 | int scopes_data_size; |
duke@435 | 89 | int scopes_pcs_size; |
duke@435 | 90 | int dependencies_size; |
duke@435 | 91 | int handler_table_size; |
duke@435 | 92 | int nul_chk_table_size; |
duke@435 | 93 | int oops_size; |
duke@435 | 94 | |
duke@435 | 95 | void note_nmethod(nmethod* nm) { |
duke@435 | 96 | nmethod_count += 1; |
duke@435 | 97 | total_size += nm->size(); |
duke@435 | 98 | relocation_size += nm->relocation_size(); |
duke@435 | 99 | code_size += nm->code_size(); |
duke@435 | 100 | stub_size += nm->stub_size(); |
duke@435 | 101 | consts_size += nm->consts_size(); |
duke@435 | 102 | scopes_data_size += nm->scopes_data_size(); |
duke@435 | 103 | scopes_pcs_size += nm->scopes_pcs_size(); |
duke@435 | 104 | dependencies_size += nm->dependencies_size(); |
duke@435 | 105 | handler_table_size += nm->handler_table_size(); |
duke@435 | 106 | nul_chk_table_size += nm->nul_chk_table_size(); |
duke@435 | 107 | oops_size += nm->oops_size(); |
duke@435 | 108 | } |
duke@435 | 109 | void print_nmethod_stats() { |
duke@435 | 110 | if (nmethod_count == 0) return; |
duke@435 | 111 | tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); |
duke@435 | 112 | if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); |
duke@435 | 113 | if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); |
duke@435 | 114 | if (code_size != 0) tty->print_cr(" main code = %d", code_size); |
duke@435 | 115 | if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
duke@435 | 116 | if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
duke@435 | 117 | if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
duke@435 | 118 | if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); |
duke@435 | 119 | if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); |
duke@435 | 120 | if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); |
duke@435 | 121 | if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); |
duke@435 | 122 | if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
duke@435 | 123 | } |
duke@435 | 124 | |
duke@435 | 125 | int native_nmethod_count; |
duke@435 | 126 | int native_total_size; |
duke@435 | 127 | int native_relocation_size; |
duke@435 | 128 | int native_code_size; |
duke@435 | 129 | int native_oops_size; |
duke@435 | 130 | void note_native_nmethod(nmethod* nm) { |
duke@435 | 131 | native_nmethod_count += 1; |
duke@435 | 132 | native_total_size += nm->size(); |
duke@435 | 133 | native_relocation_size += nm->relocation_size(); |
duke@435 | 134 | native_code_size += nm->code_size(); |
duke@435 | 135 | native_oops_size += nm->oops_size(); |
duke@435 | 136 | } |
duke@435 | 137 | void print_native_nmethod_stats() { |
duke@435 | 138 | if (native_nmethod_count == 0) return; |
duke@435 | 139 | tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); |
duke@435 | 140 | if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); |
duke@435 | 141 | if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); |
duke@435 | 142 | if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size); |
duke@435 | 143 | if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
duke@435 | 144 | } |
duke@435 | 145 | |
duke@435 | 146 | int pc_desc_resets; // number of resets (= number of caches) |
duke@435 | 147 | int pc_desc_queries; // queries to nmethod::find_pc_desc |
duke@435 | 148 | int pc_desc_approx; // number of those which have approximate true |
duke@435 | 149 | int pc_desc_repeats; // number of _last_pc_desc hits |
duke@435 | 150 | int pc_desc_hits; // number of LRU cache hits |
duke@435 | 151 | int pc_desc_tests; // total number of PcDesc examinations |
duke@435 | 152 | int pc_desc_searches; // total number of quasi-binary search steps |
duke@435 | 153 | int pc_desc_adds; // number of LUR cache insertions |
duke@435 | 154 | |
duke@435 | 155 | void print_pc_stats() { |
duke@435 | 156 | tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", |
duke@435 | 157 | pc_desc_queries, |
duke@435 | 158 | (double)(pc_desc_tests + pc_desc_searches) |
duke@435 | 159 | / pc_desc_queries); |
duke@435 | 160 | tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", |
duke@435 | 161 | pc_desc_resets, |
duke@435 | 162 | pc_desc_queries, pc_desc_approx, |
duke@435 | 163 | pc_desc_repeats, pc_desc_hits, |
duke@435 | 164 | pc_desc_tests, pc_desc_searches, pc_desc_adds); |
duke@435 | 165 | } |
duke@435 | 166 | } nmethod_stats; |
duke@435 | 167 | #endif //PRODUCT |
duke@435 | 168 | |
duke@435 | 169 | //--------------------------------------------------------------------------------- |
duke@435 | 170 | |
duke@435 | 171 | |
duke@435 | 172 | // The _unwind_handler is a special marker address, which says that |
duke@435 | 173 | // for given exception oop and address, the frame should be removed |
duke@435 | 174 | // as the tuple cannot be caught in the nmethod |
duke@435 | 175 | address ExceptionCache::_unwind_handler = (address) -1; |
duke@435 | 176 | |
duke@435 | 177 | |
duke@435 | 178 | ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { |
duke@435 | 179 | assert(pc != NULL, "Must be non null"); |
duke@435 | 180 | assert(exception.not_null(), "Must be non null"); |
duke@435 | 181 | assert(handler != NULL, "Must be non null"); |
duke@435 | 182 | |
duke@435 | 183 | _count = 0; |
duke@435 | 184 | _exception_type = exception->klass(); |
duke@435 | 185 | _next = NULL; |
duke@435 | 186 | |
duke@435 | 187 | add_address_and_handler(pc,handler); |
duke@435 | 188 | } |
duke@435 | 189 | |
duke@435 | 190 | |
duke@435 | 191 | address ExceptionCache::match(Handle exception, address pc) { |
duke@435 | 192 | assert(pc != NULL,"Must be non null"); |
duke@435 | 193 | assert(exception.not_null(),"Must be non null"); |
duke@435 | 194 | if (exception->klass() == exception_type()) { |
duke@435 | 195 | return (test_address(pc)); |
duke@435 | 196 | } |
duke@435 | 197 | |
duke@435 | 198 | return NULL; |
duke@435 | 199 | } |
duke@435 | 200 | |
duke@435 | 201 | |
duke@435 | 202 | bool ExceptionCache::match_exception_with_space(Handle exception) { |
duke@435 | 203 | assert(exception.not_null(),"Must be non null"); |
duke@435 | 204 | if (exception->klass() == exception_type() && count() < cache_size) { |
duke@435 | 205 | return true; |
duke@435 | 206 | } |
duke@435 | 207 | return false; |
duke@435 | 208 | } |
duke@435 | 209 | |
duke@435 | 210 | |
duke@435 | 211 | address ExceptionCache::test_address(address addr) { |
duke@435 | 212 | for (int i=0; i<count(); i++) { |
duke@435 | 213 | if (pc_at(i) == addr) { |
duke@435 | 214 | return handler_at(i); |
duke@435 | 215 | } |
duke@435 | 216 | } |
duke@435 | 217 | return NULL; |
duke@435 | 218 | } |
duke@435 | 219 | |
duke@435 | 220 | |
duke@435 | 221 | bool ExceptionCache::add_address_and_handler(address addr, address handler) { |
duke@435 | 222 | if (test_address(addr) == handler) return true; |
duke@435 | 223 | if (count() < cache_size) { |
duke@435 | 224 | set_pc_at(count(),addr); |
duke@435 | 225 | set_handler_at(count(), handler); |
duke@435 | 226 | increment_count(); |
duke@435 | 227 | return true; |
duke@435 | 228 | } |
duke@435 | 229 | return false; |
duke@435 | 230 | } |
duke@435 | 231 | |
duke@435 | 232 | |
duke@435 | 233 | // private method for handling exception cache |
duke@435 | 234 | // These methods are private, and used to manipulate the exception cache |
duke@435 | 235 | // directly. |
duke@435 | 236 | ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { |
duke@435 | 237 | ExceptionCache* ec = exception_cache(); |
duke@435 | 238 | while (ec != NULL) { |
duke@435 | 239 | if (ec->match_exception_with_space(exception)) { |
duke@435 | 240 | return ec; |
duke@435 | 241 | } |
duke@435 | 242 | ec = ec->next(); |
duke@435 | 243 | } |
duke@435 | 244 | return NULL; |
duke@435 | 245 | } |
duke@435 | 246 | |
duke@435 | 247 | |
duke@435 | 248 | //----------------------------------------------------------------------------- |
duke@435 | 249 | |
duke@435 | 250 | |
duke@435 | 251 | // Helper used by both find_pc_desc methods. |
duke@435 | 252 | static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { |
duke@435 | 253 | NOT_PRODUCT(++nmethod_stats.pc_desc_tests); |
duke@435 | 254 | if (!approximate) |
duke@435 | 255 | return pc->pc_offset() == pc_offset; |
duke@435 | 256 | else |
duke@435 | 257 | return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); |
duke@435 | 258 | } |
duke@435 | 259 | |
duke@435 | 260 | void PcDescCache::reset_to(PcDesc* initial_pc_desc) { |
duke@435 | 261 | if (initial_pc_desc == NULL) { |
duke@435 | 262 | _last_pc_desc = NULL; // native method |
duke@435 | 263 | return; |
duke@435 | 264 | } |
duke@435 | 265 | NOT_PRODUCT(++nmethod_stats.pc_desc_resets); |
duke@435 | 266 | // reset the cache by filling it with benign (non-null) values |
duke@435 | 267 | assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); |
duke@435 | 268 | _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel |
duke@435 | 269 | for (int i = 0; i < cache_size; i++) |
duke@435 | 270 | _pc_descs[i] = initial_pc_desc; |
duke@435 | 271 | } |
duke@435 | 272 | |
duke@435 | 273 | PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { |
duke@435 | 274 | NOT_PRODUCT(++nmethod_stats.pc_desc_queries); |
duke@435 | 275 | NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
duke@435 | 276 | |
duke@435 | 277 | // In order to prevent race conditions do not load cache elements |
duke@435 | 278 | // repeatedly, but use a local copy: |
duke@435 | 279 | PcDesc* res; |
duke@435 | 280 | |
duke@435 | 281 | // Step one: Check the most recently returned value. |
duke@435 | 282 | res = _last_pc_desc; |
duke@435 | 283 | if (res == NULL) return NULL; // native method; no PcDescs at all |
duke@435 | 284 | if (match_desc(res, pc_offset, approximate)) { |
duke@435 | 285 | NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); |
duke@435 | 286 | return res; |
duke@435 | 287 | } |
duke@435 | 288 | |
duke@435 | 289 | // Step two: Check the LRU cache. |
duke@435 | 290 | for (int i = 0; i < cache_size; i++) { |
duke@435 | 291 | res = _pc_descs[i]; |
duke@435 | 292 | if (res->pc_offset() < 0) break; // optimization: skip empty cache |
duke@435 | 293 | if (match_desc(res, pc_offset, approximate)) { |
duke@435 | 294 | NOT_PRODUCT(++nmethod_stats.pc_desc_hits); |
duke@435 | 295 | _last_pc_desc = res; // record this cache hit in case of repeat |
duke@435 | 296 | return res; |
duke@435 | 297 | } |
duke@435 | 298 | } |
duke@435 | 299 | |
duke@435 | 300 | // Report failure. |
duke@435 | 301 | return NULL; |
duke@435 | 302 | } |
duke@435 | 303 | |
duke@435 | 304 | void PcDescCache::add_pc_desc(PcDesc* pc_desc) { |
duke@435 | 305 | NOT_PRODUCT(++nmethod_stats.pc_desc_adds); |
duke@435 | 306 | // Update the LRU cache by shifting pc_desc forward: |
duke@435 | 307 | for (int i = 0; i < cache_size; i++) { |
duke@435 | 308 | PcDesc* next = _pc_descs[i]; |
duke@435 | 309 | _pc_descs[i] = pc_desc; |
duke@435 | 310 | pc_desc = next; |
duke@435 | 311 | } |
duke@435 | 312 | // Note: Do not update _last_pc_desc. It fronts for the LRU cache. |
duke@435 | 313 | } |
duke@435 | 314 | |
duke@435 | 315 | // adjust pcs_size so that it is a multiple of both oopSize and |
duke@435 | 316 | // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple |
duke@435 | 317 | // of oopSize, then 2*sizeof(PcDesc) is) |
duke@435 | 318 | static int adjust_pcs_size(int pcs_size) { |
duke@435 | 319 | int nsize = round_to(pcs_size, oopSize); |
duke@435 | 320 | if ((nsize % sizeof(PcDesc)) != 0) { |
duke@435 | 321 | nsize = pcs_size + sizeof(PcDesc); |
duke@435 | 322 | } |
duke@435 | 323 | assert((nsize % oopSize) == 0, "correct alignment"); |
duke@435 | 324 | return nsize; |
duke@435 | 325 | } |
duke@435 | 326 | |
duke@435 | 327 | //----------------------------------------------------------------------------- |
duke@435 | 328 | |
duke@435 | 329 | |
duke@435 | 330 | void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { |
duke@435 | 331 | assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); |
duke@435 | 332 | assert(new_entry != NULL,"Must be non null"); |
duke@435 | 333 | assert(new_entry->next() == NULL, "Must be null"); |
duke@435 | 334 | |
duke@435 | 335 | if (exception_cache() != NULL) { |
duke@435 | 336 | new_entry->set_next(exception_cache()); |
duke@435 | 337 | } |
duke@435 | 338 | set_exception_cache(new_entry); |
duke@435 | 339 | } |
duke@435 | 340 | |
duke@435 | 341 | void nmethod::remove_from_exception_cache(ExceptionCache* ec) { |
duke@435 | 342 | ExceptionCache* prev = NULL; |
duke@435 | 343 | ExceptionCache* curr = exception_cache(); |
duke@435 | 344 | assert(curr != NULL, "nothing to remove"); |
duke@435 | 345 | // find the previous and next entry of ec |
duke@435 | 346 | while (curr != ec) { |
duke@435 | 347 | prev = curr; |
duke@435 | 348 | curr = curr->next(); |
duke@435 | 349 | assert(curr != NULL, "ExceptionCache not found"); |
duke@435 | 350 | } |
duke@435 | 351 | // now: curr == ec |
duke@435 | 352 | ExceptionCache* next = curr->next(); |
duke@435 | 353 | if (prev == NULL) { |
duke@435 | 354 | set_exception_cache(next); |
duke@435 | 355 | } else { |
duke@435 | 356 | prev->set_next(next); |
duke@435 | 357 | } |
duke@435 | 358 | delete curr; |
duke@435 | 359 | } |
duke@435 | 360 | |
duke@435 | 361 | |
duke@435 | 362 | // public method for accessing the exception cache |
duke@435 | 363 | // These are the public access methods. |
duke@435 | 364 | address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { |
duke@435 | 365 | // We never grab a lock to read the exception cache, so we may |
duke@435 | 366 | // have false negatives. This is okay, as it can only happen during |
duke@435 | 367 | // the first few exception lookups for a given nmethod. |
duke@435 | 368 | ExceptionCache* ec = exception_cache(); |
duke@435 | 369 | while (ec != NULL) { |
duke@435 | 370 | address ret_val; |
duke@435 | 371 | if ((ret_val = ec->match(exception,pc)) != NULL) { |
duke@435 | 372 | return ret_val; |
duke@435 | 373 | } |
duke@435 | 374 | ec = ec->next(); |
duke@435 | 375 | } |
duke@435 | 376 | return NULL; |
duke@435 | 377 | } |
duke@435 | 378 | |
duke@435 | 379 | |
duke@435 | 380 | void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { |
duke@435 | 381 | // There are potential race conditions during exception cache updates, so we |
duke@435 | 382 | // must own the ExceptionCache_lock before doing ANY modifications. Because |
twisti@1040 | 383 | // we don't lock during reads, it is possible to have several threads attempt |
duke@435 | 384 | // to update the cache with the same data. We need to check for already inserted |
duke@435 | 385 | // copies of the current data before adding it. |
duke@435 | 386 | |
duke@435 | 387 | MutexLocker ml(ExceptionCache_lock); |
duke@435 | 388 | ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); |
duke@435 | 389 | |
duke@435 | 390 | if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { |
duke@435 | 391 | target_entry = new ExceptionCache(exception,pc,handler); |
duke@435 | 392 | add_exception_cache_entry(target_entry); |
duke@435 | 393 | } |
duke@435 | 394 | } |
duke@435 | 395 | |
duke@435 | 396 | |
duke@435 | 397 | //-------------end of code for ExceptionCache-------------- |
duke@435 | 398 | |
duke@435 | 399 | |
duke@435 | 400 | void nmFlags::clear() { |
duke@435 | 401 | assert(sizeof(nmFlags) == sizeof(int), "using more than one word for nmFlags"); |
duke@435 | 402 | *(jint*)this = 0; |
duke@435 | 403 | } |
duke@435 | 404 | |
duke@435 | 405 | int nmethod::total_size() const { |
duke@435 | 406 | return |
duke@435 | 407 | code_size() + |
duke@435 | 408 | stub_size() + |
duke@435 | 409 | consts_size() + |
duke@435 | 410 | scopes_data_size() + |
duke@435 | 411 | scopes_pcs_size() + |
duke@435 | 412 | handler_table_size() + |
duke@435 | 413 | nul_chk_table_size(); |
duke@435 | 414 | } |
duke@435 | 415 | |
duke@435 | 416 | const char* nmethod::compile_kind() const { |
duke@435 | 417 | if (method() == NULL) return "unloaded"; |
duke@435 | 418 | if (is_native_method()) return "c2n"; |
duke@435 | 419 | if (is_osr_method()) return "osr"; |
duke@435 | 420 | return NULL; |
duke@435 | 421 | } |
duke@435 | 422 | |
duke@435 | 423 | // %%% This variable is no longer used? |
duke@435 | 424 | int nmethod::_zombie_instruction_size = NativeJump::instruction_size; |
duke@435 | 425 | |
duke@435 | 426 | |
duke@435 | 427 | nmethod* nmethod::new_native_nmethod(methodHandle method, |
duke@435 | 428 | CodeBuffer *code_buffer, |
duke@435 | 429 | int vep_offset, |
duke@435 | 430 | int frame_complete, |
duke@435 | 431 | int frame_size, |
duke@435 | 432 | ByteSize basic_lock_owner_sp_offset, |
duke@435 | 433 | ByteSize basic_lock_sp_offset, |
duke@435 | 434 | OopMapSet* oop_maps) { |
duke@435 | 435 | // create nmethod |
duke@435 | 436 | nmethod* nm = NULL; |
duke@435 | 437 | { |
duke@435 | 438 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
duke@435 | 439 | int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
duke@435 | 440 | CodeOffsets offsets; |
duke@435 | 441 | offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
duke@435 | 442 | offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
duke@435 | 443 | nm = new (native_nmethod_size) |
duke@435 | 444 | nmethod(method(), native_nmethod_size, &offsets, |
duke@435 | 445 | code_buffer, frame_size, |
duke@435 | 446 | basic_lock_owner_sp_offset, basic_lock_sp_offset, |
duke@435 | 447 | oop_maps); |
duke@435 | 448 | NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); |
duke@435 | 449 | if (PrintAssembly && nm != NULL) |
duke@435 | 450 | Disassembler::decode(nm); |
duke@435 | 451 | } |
duke@435 | 452 | // verify nmethod |
duke@435 | 453 | debug_only(if (nm) nm->verify();) // might block |
duke@435 | 454 | |
duke@435 | 455 | if (nm != NULL) { |
duke@435 | 456 | nm->log_new_nmethod(); |
duke@435 | 457 | } |
duke@435 | 458 | |
duke@435 | 459 | return nm; |
duke@435 | 460 | } |
duke@435 | 461 | |
kamg@551 | 462 | #ifdef HAVE_DTRACE_H |
kamg@551 | 463 | nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
kamg@551 | 464 | CodeBuffer *code_buffer, |
kamg@551 | 465 | int vep_offset, |
kamg@551 | 466 | int trap_offset, |
kamg@551 | 467 | int frame_complete, |
kamg@551 | 468 | int frame_size) { |
kamg@551 | 469 | // create nmethod |
kamg@551 | 470 | nmethod* nm = NULL; |
kamg@551 | 471 | { |
kamg@551 | 472 | MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
kamg@551 | 473 | int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
kamg@551 | 474 | CodeOffsets offsets; |
kamg@551 | 475 | offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
kamg@551 | 476 | offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
kamg@551 | 477 | offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
kamg@551 | 478 | |
kamg@551 | 479 | nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
kamg@551 | 480 | |
kamg@551 | 481 | NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
kamg@551 | 482 | if (PrintAssembly && nm != NULL) |
kamg@551 | 483 | Disassembler::decode(nm); |
kamg@551 | 484 | } |
kamg@551 | 485 | // verify nmethod |
kamg@551 | 486 | debug_only(if (nm) nm->verify();) // might block |
kamg@551 | 487 | |
kamg@551 | 488 | if (nm != NULL) { |
kamg@551 | 489 | nm->log_new_nmethod(); |
kamg@551 | 490 | } |
kamg@551 | 491 | |
kamg@551 | 492 | return nm; |
kamg@551 | 493 | } |
kamg@551 | 494 | |
kamg@551 | 495 | #endif // def HAVE_DTRACE_H |
kamg@551 | 496 | |
duke@435 | 497 | nmethod* nmethod::new_nmethod(methodHandle method, |
duke@435 | 498 | int compile_id, |
duke@435 | 499 | int entry_bci, |
duke@435 | 500 | CodeOffsets* offsets, |
duke@435 | 501 | int orig_pc_offset, |
duke@435 | 502 | DebugInformationRecorder* debug_info, |
duke@435 | 503 | Dependencies* dependencies, |
duke@435 | 504 | CodeBuffer* code_buffer, int frame_size, |
duke@435 | 505 | OopMapSet* oop_maps, |
duke@435 | 506 | ExceptionHandlerTable* handler_table, |
duke@435 | 507 | ImplicitExceptionTable* nul_chk_table, |
duke@435 | 508 | AbstractCompiler* compiler, |
duke@435 | 509 | int comp_level |
duke@435 | 510 | ) |
duke@435 | 511 | { |
duke@435 | 512 | assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); |
duke@435 | 513 | // create nmethod |
duke@435 | 514 | nmethod* nm = NULL; |
duke@435 | 515 | { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
duke@435 | 516 | int nmethod_size = |
duke@435 | 517 | allocation_size(code_buffer, sizeof(nmethod)) |
duke@435 | 518 | + adjust_pcs_size(debug_info->pcs_size()) |
duke@435 | 519 | + round_to(dependencies->size_in_bytes() , oopSize) |
duke@435 | 520 | + round_to(handler_table->size_in_bytes(), oopSize) |
duke@435 | 521 | + round_to(nul_chk_table->size_in_bytes(), oopSize) |
duke@435 | 522 | + round_to(debug_info->data_size() , oopSize); |
duke@435 | 523 | nm = new (nmethod_size) |
duke@435 | 524 | nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
duke@435 | 525 | orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
duke@435 | 526 | oop_maps, |
duke@435 | 527 | handler_table, |
duke@435 | 528 | nul_chk_table, |
duke@435 | 529 | compiler, |
duke@435 | 530 | comp_level); |
duke@435 | 531 | if (nm != NULL) { |
duke@435 | 532 | // To make dependency checking during class loading fast, record |
duke@435 | 533 | // the nmethod dependencies in the classes it is dependent on. |
duke@435 | 534 | // This allows the dependency checking code to simply walk the |
duke@435 | 535 | // class hierarchy above the loaded class, checking only nmethods |
duke@435 | 536 | // which are dependent on those classes. The slow way is to |
duke@435 | 537 | // check every nmethod for dependencies which makes it linear in |
duke@435 | 538 | // the number of methods compiled. For applications with a lot |
duke@435 | 539 | // classes the slow way is too slow. |
duke@435 | 540 | for (Dependencies::DepStream deps(nm); deps.next(); ) { |
duke@435 | 541 | klassOop klass = deps.context_type(); |
duke@435 | 542 | if (klass == NULL) continue; // ignore things like evol_method |
duke@435 | 543 | |
duke@435 | 544 | // record this nmethod as dependent on this klass |
duke@435 | 545 | instanceKlass::cast(klass)->add_dependent_nmethod(nm); |
duke@435 | 546 | } |
duke@435 | 547 | } |
duke@435 | 548 | NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
duke@435 | 549 | if (PrintAssembly && nm != NULL) |
duke@435 | 550 | Disassembler::decode(nm); |
duke@435 | 551 | } |
duke@435 | 552 | |
duke@435 | 553 | // verify nmethod |
duke@435 | 554 | debug_only(if (nm) nm->verify();) // might block |
duke@435 | 555 | |
duke@435 | 556 | if (nm != NULL) { |
duke@435 | 557 | nm->log_new_nmethod(); |
duke@435 | 558 | } |
duke@435 | 559 | |
duke@435 | 560 | // done |
duke@435 | 561 | return nm; |
duke@435 | 562 | } |
duke@435 | 563 | |
duke@435 | 564 | |
duke@435 | 565 | // For native wrappers |
duke@435 | 566 | nmethod::nmethod( |
duke@435 | 567 | methodOop method, |
duke@435 | 568 | int nmethod_size, |
duke@435 | 569 | CodeOffsets* offsets, |
duke@435 | 570 | CodeBuffer* code_buffer, |
duke@435 | 571 | int frame_size, |
duke@435 | 572 | ByteSize basic_lock_owner_sp_offset, |
duke@435 | 573 | ByteSize basic_lock_sp_offset, |
duke@435 | 574 | OopMapSet* oop_maps ) |
duke@435 | 575 | : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), |
duke@435 | 576 | nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), |
duke@435 | 577 | _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), |
duke@435 | 578 | _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) |
duke@435 | 579 | { |
duke@435 | 580 | { |
duke@435 | 581 | debug_only(No_Safepoint_Verifier nsv;) |
duke@435 | 582 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 583 | |
duke@435 | 584 | NOT_PRODUCT(_has_debug_info = false; ) |
duke@435 | 585 | _method = method; |
duke@435 | 586 | _entry_bci = InvocationEntryBci; |
duke@435 | 587 | _link = NULL; |
duke@435 | 588 | _compiler = NULL; |
duke@435 | 589 | // We have no exception handler or deopt handler make the |
duke@435 | 590 | // values something that will never match a pc like the nmethod vtable entry |
duke@435 | 591 | _exception_offset = 0; |
duke@435 | 592 | _deoptimize_offset = 0; |
duke@435 | 593 | _orig_pc_offset = 0; |
kamg@551 | 594 | #ifdef HAVE_DTRACE_H |
kamg@551 | 595 | _trap_offset = 0; |
kamg@551 | 596 | #endif // def HAVE_DTRACE_H |
duke@435 | 597 | _stub_offset = data_offset(); |
duke@435 | 598 | _consts_offset = data_offset(); |
duke@435 | 599 | _scopes_data_offset = data_offset(); |
duke@435 | 600 | _scopes_pcs_offset = _scopes_data_offset; |
duke@435 | 601 | _dependencies_offset = _scopes_pcs_offset; |
duke@435 | 602 | _handler_table_offset = _dependencies_offset; |
duke@435 | 603 | _nul_chk_table_offset = _handler_table_offset; |
duke@435 | 604 | _nmethod_end_offset = _nul_chk_table_offset; |
duke@435 | 605 | _compile_id = 0; // default |
duke@435 | 606 | _comp_level = CompLevel_none; |
duke@435 | 607 | _entry_point = instructions_begin(); |
duke@435 | 608 | _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
duke@435 | 609 | _osr_entry_point = NULL; |
duke@435 | 610 | _exception_cache = NULL; |
duke@435 | 611 | _pc_desc_cache.reset_to(NULL); |
duke@435 | 612 | |
duke@435 | 613 | flags.clear(); |
duke@435 | 614 | flags.state = alive; |
duke@435 | 615 | _markedForDeoptimization = 0; |
duke@435 | 616 | |
duke@435 | 617 | _lock_count = 0; |
duke@435 | 618 | _stack_traversal_mark = 0; |
duke@435 | 619 | |
duke@435 | 620 | code_buffer->copy_oops_to(this); |
duke@435 | 621 | debug_only(check_store();) |
duke@435 | 622 | CodeCache::commit(this); |
duke@435 | 623 | VTune::create_nmethod(this); |
duke@435 | 624 | } |
duke@435 | 625 | |
duke@435 | 626 | if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
duke@435 | 627 | ttyLocker ttyl; // keep the following output all in one block |
duke@435 | 628 | // This output goes directly to the tty, not the compiler log. |
duke@435 | 629 | // To enable tools to match it up with the compilation activity, |
duke@435 | 630 | // be sure to tag this tty output with the compile ID. |
duke@435 | 631 | if (xtty != NULL) { |
duke@435 | 632 | xtty->begin_head("print_native_nmethod"); |
duke@435 | 633 | xtty->method(_method); |
duke@435 | 634 | xtty->stamp(); |
duke@435 | 635 | xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
duke@435 | 636 | } |
duke@435 | 637 | // print the header part first |
duke@435 | 638 | print(); |
duke@435 | 639 | // then print the requested information |
duke@435 | 640 | if (PrintNativeNMethods) { |
duke@435 | 641 | print_code(); |
duke@435 | 642 | oop_maps->print(); |
duke@435 | 643 | } |
duke@435 | 644 | if (PrintRelocations) { |
duke@435 | 645 | print_relocations(); |
duke@435 | 646 | } |
duke@435 | 647 | if (xtty != NULL) { |
duke@435 | 648 | xtty->tail("print_native_nmethod"); |
duke@435 | 649 | } |
duke@435 | 650 | } |
duke@435 | 651 | Events::log("Create nmethod " INTPTR_FORMAT, this); |
duke@435 | 652 | } |
duke@435 | 653 | |
kamg@551 | 654 | // For dtrace wrappers |
kamg@551 | 655 | #ifdef HAVE_DTRACE_H |
kamg@551 | 656 | nmethod::nmethod( |
kamg@551 | 657 | methodOop method, |
kamg@551 | 658 | int nmethod_size, |
kamg@551 | 659 | CodeOffsets* offsets, |
kamg@551 | 660 | CodeBuffer* code_buffer, |
kamg@551 | 661 | int frame_size) |
kamg@551 | 662 | : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
kamg@551 | 663 | nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
kamg@551 | 664 | _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
kamg@551 | 665 | _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
kamg@551 | 666 | { |
kamg@551 | 667 | { |
kamg@551 | 668 | debug_only(No_Safepoint_Verifier nsv;) |
kamg@551 | 669 | assert_locked_or_safepoint(CodeCache_lock); |
kamg@551 | 670 | |
kamg@551 | 671 | NOT_PRODUCT(_has_debug_info = false; ) |
kamg@551 | 672 | _method = method; |
kamg@551 | 673 | _entry_bci = InvocationEntryBci; |
kamg@551 | 674 | _link = NULL; |
kamg@551 | 675 | _compiler = NULL; |
kamg@551 | 676 | // We have no exception handler or deopt handler make the |
kamg@551 | 677 | // values something that will never match a pc like the nmethod vtable entry |
kamg@551 | 678 | _exception_offset = 0; |
kamg@551 | 679 | _deoptimize_offset = 0; |
kamg@551 | 680 | _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
kamg@551 | 681 | _orig_pc_offset = 0; |
kamg@551 | 682 | _stub_offset = data_offset(); |
kamg@551 | 683 | _consts_offset = data_offset(); |
kamg@551 | 684 | _scopes_data_offset = data_offset(); |
kamg@551 | 685 | _scopes_pcs_offset = _scopes_data_offset; |
kamg@551 | 686 | _dependencies_offset = _scopes_pcs_offset; |
kamg@551 | 687 | _handler_table_offset = _dependencies_offset; |
kamg@551 | 688 | _nul_chk_table_offset = _handler_table_offset; |
kamg@551 | 689 | _nmethod_end_offset = _nul_chk_table_offset; |
kamg@551 | 690 | _compile_id = 0; // default |
kamg@551 | 691 | _comp_level = CompLevel_none; |
kamg@551 | 692 | _entry_point = instructions_begin(); |
kamg@551 | 693 | _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
kamg@551 | 694 | _osr_entry_point = NULL; |
kamg@551 | 695 | _exception_cache = NULL; |
kamg@551 | 696 | _pc_desc_cache.reset_to(NULL); |
kamg@551 | 697 | |
kamg@551 | 698 | flags.clear(); |
kamg@551 | 699 | flags.state = alive; |
kamg@551 | 700 | _markedForDeoptimization = 0; |
kamg@551 | 701 | |
kamg@551 | 702 | _lock_count = 0; |
kamg@551 | 703 | _stack_traversal_mark = 0; |
kamg@551 | 704 | |
kamg@551 | 705 | code_buffer->copy_oops_to(this); |
kamg@551 | 706 | debug_only(check_store();) |
kamg@551 | 707 | CodeCache::commit(this); |
kamg@551 | 708 | VTune::create_nmethod(this); |
kamg@551 | 709 | } |
kamg@551 | 710 | |
kamg@551 | 711 | if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
kamg@551 | 712 | ttyLocker ttyl; // keep the following output all in one block |
kamg@551 | 713 | // This output goes directly to the tty, not the compiler log. |
kamg@551 | 714 | // To enable tools to match it up with the compilation activity, |
kamg@551 | 715 | // be sure to tag this tty output with the compile ID. |
kamg@551 | 716 | if (xtty != NULL) { |
kamg@551 | 717 | xtty->begin_head("print_dtrace_nmethod"); |
kamg@551 | 718 | xtty->method(_method); |
kamg@551 | 719 | xtty->stamp(); |
kamg@551 | 720 | xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
kamg@551 | 721 | } |
kamg@551 | 722 | // print the header part first |
kamg@551 | 723 | print(); |
kamg@551 | 724 | // then print the requested information |
kamg@551 | 725 | if (PrintNMethods) { |
kamg@551 | 726 | print_code(); |
kamg@551 | 727 | } |
kamg@551 | 728 | if (PrintRelocations) { |
kamg@551 | 729 | print_relocations(); |
kamg@551 | 730 | } |
kamg@551 | 731 | if (xtty != NULL) { |
kamg@551 | 732 | xtty->tail("print_dtrace_nmethod"); |
kamg@551 | 733 | } |
kamg@551 | 734 | } |
kamg@551 | 735 | Events::log("Create nmethod " INTPTR_FORMAT, this); |
kamg@551 | 736 | } |
kamg@551 | 737 | #endif // def HAVE_DTRACE_H |
duke@435 | 738 | |
duke@435 | 739 | void* nmethod::operator new(size_t size, int nmethod_size) { |
duke@435 | 740 | // Always leave some room in the CodeCache for I2C/C2I adapters |
duke@435 | 741 | if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; |
duke@435 | 742 | return CodeCache::allocate(nmethod_size); |
duke@435 | 743 | } |
duke@435 | 744 | |
duke@435 | 745 | |
duke@435 | 746 | nmethod::nmethod( |
duke@435 | 747 | methodOop method, |
duke@435 | 748 | int nmethod_size, |
duke@435 | 749 | int compile_id, |
duke@435 | 750 | int entry_bci, |
duke@435 | 751 | CodeOffsets* offsets, |
duke@435 | 752 | int orig_pc_offset, |
duke@435 | 753 | DebugInformationRecorder* debug_info, |
duke@435 | 754 | Dependencies* dependencies, |
duke@435 | 755 | CodeBuffer *code_buffer, |
duke@435 | 756 | int frame_size, |
duke@435 | 757 | OopMapSet* oop_maps, |
duke@435 | 758 | ExceptionHandlerTable* handler_table, |
duke@435 | 759 | ImplicitExceptionTable* nul_chk_table, |
duke@435 | 760 | AbstractCompiler* compiler, |
duke@435 | 761 | int comp_level |
duke@435 | 762 | ) |
duke@435 | 763 | : CodeBlob("nmethod", code_buffer, sizeof(nmethod), |
duke@435 | 764 | nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), |
duke@435 | 765 | _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
duke@435 | 766 | _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
duke@435 | 767 | { |
duke@435 | 768 | assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); |
duke@435 | 769 | { |
duke@435 | 770 | debug_only(No_Safepoint_Verifier nsv;) |
duke@435 | 771 | assert_locked_or_safepoint(CodeCache_lock); |
duke@435 | 772 | |
duke@435 | 773 | NOT_PRODUCT(_has_debug_info = false; ) |
duke@435 | 774 | _method = method; |
duke@435 | 775 | _compile_id = compile_id; |
duke@435 | 776 | _comp_level = comp_level; |
duke@435 | 777 | _entry_bci = entry_bci; |
duke@435 | 778 | _link = NULL; |
duke@435 | 779 | _compiler = compiler; |
duke@435 | 780 | _orig_pc_offset = orig_pc_offset; |
kamg@551 | 781 | #ifdef HAVE_DTRACE_H |
kamg@551 | 782 | _trap_offset = 0; |
kamg@551 | 783 | #endif // def HAVE_DTRACE_H |
duke@435 | 784 | _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); |
duke@435 | 785 | |
duke@435 | 786 | // Exception handler and deopt handler are in the stub section |
duke@435 | 787 | _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
duke@435 | 788 | _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); |
duke@435 | 789 | _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); |
duke@435 | 790 | _scopes_data_offset = data_offset(); |
duke@435 | 791 | _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
duke@435 | 792 | _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
duke@435 | 793 | _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); |
duke@435 | 794 | _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); |
duke@435 | 795 | _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); |
duke@435 | 796 | |
duke@435 | 797 | _entry_point = instructions_begin(); |
duke@435 | 798 | _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
duke@435 | 799 | _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); |
duke@435 | 800 | _exception_cache = NULL; |
duke@435 | 801 | _pc_desc_cache.reset_to(scopes_pcs_begin()); |
duke@435 | 802 | |
duke@435 | 803 | flags.clear(); |
duke@435 | 804 | flags.state = alive; |
duke@435 | 805 | _markedForDeoptimization = 0; |
duke@435 | 806 | |
duke@435 | 807 | _unload_reported = false; // jvmti state |
duke@435 | 808 | |
duke@435 | 809 | _lock_count = 0; |
duke@435 | 810 | _stack_traversal_mark = 0; |
duke@435 | 811 | |
duke@435 | 812 | // Copy contents of ScopeDescRecorder to nmethod |
duke@435 | 813 | code_buffer->copy_oops_to(this); |
duke@435 | 814 | debug_info->copy_to(this); |
duke@435 | 815 | dependencies->copy_to(this); |
duke@435 | 816 | debug_only(check_store();) |
duke@435 | 817 | |
duke@435 | 818 | CodeCache::commit(this); |
duke@435 | 819 | |
duke@435 | 820 | VTune::create_nmethod(this); |
duke@435 | 821 | |
duke@435 | 822 | // Copy contents of ExceptionHandlerTable to nmethod |
duke@435 | 823 | handler_table->copy_to(this); |
duke@435 | 824 | nul_chk_table->copy_to(this); |
duke@435 | 825 | |
duke@435 | 826 | // we use the information of entry points to find out if a method is |
duke@435 | 827 | // static or non static |
duke@435 | 828 | assert(compiler->is_c2() || |
duke@435 | 829 | _method->is_static() == (entry_point() == _verified_entry_point), |
duke@435 | 830 | " entry points must be same for static methods and vice versa"); |
duke@435 | 831 | } |
duke@435 | 832 | |
jrose@535 | 833 | bool printnmethods = PrintNMethods |
jrose@535 | 834 | || CompilerOracle::should_print(_method) |
jrose@535 | 835 | || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
duke@435 | 836 | if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
duke@435 | 837 | print_nmethod(printnmethods); |
duke@435 | 838 | } |
duke@435 | 839 | |
duke@435 | 840 | // Note: Do not verify in here as the CodeCache_lock is |
duke@435 | 841 | // taken which would conflict with the CompiledIC_lock |
duke@435 | 842 | // which taken during the verification of call sites. |
duke@435 | 843 | // (was bug - gri 10/25/99) |
duke@435 | 844 | |
duke@435 | 845 | Events::log("Create nmethod " INTPTR_FORMAT, this); |
duke@435 | 846 | } |
duke@435 | 847 | |
duke@435 | 848 | |
duke@435 | 849 | // Print a short set of xml attributes to identify this nmethod. The |
duke@435 | 850 | // output should be embedded in some other element. |
duke@435 | 851 | void nmethod::log_identity(xmlStream* log) const { |
duke@435 | 852 | log->print(" compile_id='%d'", compile_id()); |
duke@435 | 853 | const char* nm_kind = compile_kind(); |
duke@435 | 854 | if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); |
duke@435 | 855 | if (compiler() != NULL) { |
duke@435 | 856 | log->print(" compiler='%s'", compiler()->name()); |
duke@435 | 857 | } |
duke@435 | 858 | #ifdef TIERED |
duke@435 | 859 | log->print(" level='%d'", comp_level()); |
duke@435 | 860 | #endif // TIERED |
duke@435 | 861 | } |
duke@435 | 862 | |
duke@435 | 863 | |
duke@435 | 864 | #define LOG_OFFSET(log, name) \ |
duke@435 | 865 | if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ |
duke@435 | 866 | log->print(" " XSTR(name) "_offset='%d'" , \ |
duke@435 | 867 | (intptr_t)name##_begin() - (intptr_t)this) |
duke@435 | 868 | |
duke@435 | 869 | |
duke@435 | 870 | void nmethod::log_new_nmethod() const { |
duke@435 | 871 | if (LogCompilation && xtty != NULL) { |
duke@435 | 872 | ttyLocker ttyl; |
duke@435 | 873 | HandleMark hm; |
duke@435 | 874 | xtty->begin_elem("nmethod"); |
duke@435 | 875 | log_identity(xtty); |
duke@435 | 876 | xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", |
duke@435 | 877 | instructions_begin(), size()); |
duke@435 | 878 | xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
duke@435 | 879 | |
duke@435 | 880 | LOG_OFFSET(xtty, relocation); |
duke@435 | 881 | LOG_OFFSET(xtty, code); |
duke@435 | 882 | LOG_OFFSET(xtty, stub); |
duke@435 | 883 | LOG_OFFSET(xtty, consts); |
duke@435 | 884 | LOG_OFFSET(xtty, scopes_data); |
duke@435 | 885 | LOG_OFFSET(xtty, scopes_pcs); |
duke@435 | 886 | LOG_OFFSET(xtty, dependencies); |
duke@435 | 887 | LOG_OFFSET(xtty, handler_table); |
duke@435 | 888 | LOG_OFFSET(xtty, nul_chk_table); |
duke@435 | 889 | LOG_OFFSET(xtty, oops); |
duke@435 | 890 | |
duke@435 | 891 | xtty->method(method()); |
duke@435 | 892 | xtty->stamp(); |
duke@435 | 893 | xtty->end_elem(); |
duke@435 | 894 | } |
duke@435 | 895 | } |
duke@435 | 896 | |
duke@435 | 897 | #undef LOG_OFFSET |
duke@435 | 898 | |
duke@435 | 899 | |
duke@435 | 900 | // Print out more verbose output usually for a newly created nmethod. |
duke@435 | 901 | void nmethod::print_on(outputStream* st, const char* title) const { |
duke@435 | 902 | if (st != NULL) { |
duke@435 | 903 | ttyLocker ttyl; |
duke@435 | 904 | // Print a little tag line that looks like +PrintCompilation output: |
duke@435 | 905 | st->print("%3d%c %s", |
duke@435 | 906 | compile_id(), |
duke@435 | 907 | is_osr_method() ? '%' : |
duke@435 | 908 | method() != NULL && |
duke@435 | 909 | is_native_method() ? 'n' : ' ', |
duke@435 | 910 | title); |
duke@435 | 911 | #ifdef TIERED |
duke@435 | 912 | st->print(" (%d) ", comp_level()); |
duke@435 | 913 | #endif // TIERED |
duke@435 | 914 | if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
duke@435 | 915 | if (method() != NULL) { |
duke@435 | 916 | method()->print_short_name(st); |
duke@435 | 917 | if (is_osr_method()) |
duke@435 | 918 | st->print(" @ %d", osr_entry_bci()); |
duke@435 | 919 | if (method()->code_size() > 0) |
duke@435 | 920 | st->print(" (%d bytes)", method()->code_size()); |
duke@435 | 921 | } |
duke@435 | 922 | } |
duke@435 | 923 | } |
duke@435 | 924 | |
duke@435 | 925 | |
duke@435 | 926 | void nmethod::print_nmethod(bool printmethod) { |
duke@435 | 927 | ttyLocker ttyl; // keep the following output all in one block |
duke@435 | 928 | if (xtty != NULL) { |
duke@435 | 929 | xtty->begin_head("print_nmethod"); |
duke@435 | 930 | xtty->stamp(); |
duke@435 | 931 | xtty->end_head(); |
duke@435 | 932 | } |
duke@435 | 933 | // print the header part first |
duke@435 | 934 | print(); |
duke@435 | 935 | // then print the requested information |
duke@435 | 936 | if (printmethod) { |
duke@435 | 937 | print_code(); |
duke@435 | 938 | print_pcs(); |
duke@435 | 939 | oop_maps()->print(); |
duke@435 | 940 | } |
duke@435 | 941 | if (PrintDebugInfo) { |
duke@435 | 942 | print_scopes(); |
duke@435 | 943 | } |
duke@435 | 944 | if (PrintRelocations) { |
duke@435 | 945 | print_relocations(); |
duke@435 | 946 | } |
duke@435 | 947 | if (PrintDependencies) { |
duke@435 | 948 | print_dependencies(); |
duke@435 | 949 | } |
duke@435 | 950 | if (PrintExceptionHandlers) { |
duke@435 | 951 | print_handler_table(); |
duke@435 | 952 | print_nul_chk_table(); |
duke@435 | 953 | } |
duke@435 | 954 | if (xtty != NULL) { |
duke@435 | 955 | xtty->tail("print_nmethod"); |
duke@435 | 956 | } |
duke@435 | 957 | } |
duke@435 | 958 | |
duke@435 | 959 | |
duke@435 | 960 | void nmethod::set_version(int v) { |
duke@435 | 961 | flags.version = v; |
duke@435 | 962 | } |
duke@435 | 963 | |
duke@435 | 964 | |
duke@435 | 965 | ScopeDesc* nmethod::scope_desc_at(address pc) { |
duke@435 | 966 | PcDesc* pd = pc_desc_at(pc); |
duke@435 | 967 | guarantee(pd != NULL, "scope must be present"); |
duke@435 | 968 | return new ScopeDesc(this, pd->scope_decode_offset(), |
duke@435 | 969 | pd->obj_decode_offset()); |
duke@435 | 970 | } |
duke@435 | 971 | |
duke@435 | 972 | |
duke@435 | 973 | void nmethod::clear_inline_caches() { |
duke@435 | 974 | assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); |
duke@435 | 975 | if (is_zombie()) { |
duke@435 | 976 | return; |
duke@435 | 977 | } |
duke@435 | 978 | |
duke@435 | 979 | RelocIterator iter(this); |
duke@435 | 980 | while (iter.next()) { |
duke@435 | 981 | iter.reloc()->clear_inline_cache(); |
duke@435 | 982 | } |
duke@435 | 983 | } |
duke@435 | 984 | |
duke@435 | 985 | |
duke@435 | 986 | void nmethod::cleanup_inline_caches() { |
duke@435 | 987 | |
duke@435 | 988 | assert(SafepointSynchronize::is_at_safepoint() && |
duke@435 | 989 | !CompiledIC_lock->is_locked() && |
duke@435 | 990 | !Patching_lock->is_locked(), "no threads must be updating the inline caches by them selfs"); |
duke@435 | 991 | |
duke@435 | 992 | // If the method is not entrant or zombie then a JMP is plastered over the |
duke@435 | 993 | // first few bytes. If an oop in the old code was there, that oop |
duke@435 | 994 | // should not get GC'd. Skip the first few bytes of oops on |
duke@435 | 995 | // not-entrant methods. |
duke@435 | 996 | address low_boundary = verified_entry_point(); |
duke@435 | 997 | if (!is_in_use()) { |
duke@435 | 998 | low_boundary += NativeJump::instruction_size; |
duke@435 | 999 | // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
duke@435 | 1000 | // This means that the low_boundary is going to be a little too high. |
duke@435 | 1001 | // This shouldn't matter, since oops of non-entrant methods are never used. |
duke@435 | 1002 | // In fact, why are we bothering to look at oops in a non-entrant method?? |
duke@435 | 1003 | } |
duke@435 | 1004 | |
duke@435 | 1005 | // Find all calls in an nmethod, and clear the ones that points to zombie methods |
duke@435 | 1006 | ResourceMark rm; |
duke@435 | 1007 | RelocIterator iter(this, low_boundary); |
duke@435 | 1008 | while(iter.next()) { |
duke@435 | 1009 | switch(iter.type()) { |
duke@435 | 1010 | case relocInfo::virtual_call_type: |
duke@435 | 1011 | case relocInfo::opt_virtual_call_type: { |
duke@435 | 1012 | CompiledIC *ic = CompiledIC_at(iter.reloc()); |
duke@435 | 1013 | // Ok, to lookup references to zombies here |
duke@435 | 1014 | CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); |
duke@435 | 1015 | if( cb != NULL && cb->is_nmethod() ) { |
duke@435 | 1016 | nmethod* nm = (nmethod*)cb; |
duke@435 | 1017 | // Clean inline caches pointing to both zombie and not_entrant methods |
duke@435 | 1018 | if (!nm->is_in_use()) ic->set_to_clean(); |
duke@435 | 1019 | } |
duke@435 | 1020 | break; |
duke@435 | 1021 | } |
duke@435 | 1022 | case relocInfo::static_call_type: { |
duke@435 | 1023 | CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); |
duke@435 | 1024 | CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); |
duke@435 | 1025 | if( cb != NULL && cb->is_nmethod() ) { |
duke@435 | 1026 | nmethod* nm = (nmethod*)cb; |
duke@435 | 1027 | // Clean inline caches pointing to both zombie and not_entrant methods |
duke@435 | 1028 | if (!nm->is_in_use()) csc->set_to_clean(); |
duke@435 | 1029 | } |
duke@435 | 1030 | break; |
duke@435 | 1031 | } |
duke@435 | 1032 | } |
duke@435 | 1033 | } |
duke@435 | 1034 | } |
duke@435 | 1035 | |
duke@435 | 1036 | void nmethod::mark_as_seen_on_stack() { |
duke@435 | 1037 | assert(is_not_entrant(), "must be a non-entrant method"); |
duke@435 | 1038 | set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
duke@435 | 1039 | } |
duke@435 | 1040 | |
duke@435 | 1041 | // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) |
duke@435 | 1042 | bool nmethod::can_not_entrant_be_converted() { |
duke@435 | 1043 | assert(is_not_entrant(), "must be a non-entrant method"); |
duke@435 | 1044 | assert(SafepointSynchronize::is_at_safepoint(), "must be called during a safepoint"); |
duke@435 | 1045 | |
duke@435 | 1046 | // Since the nmethod sweeper only does partial sweep the sweeper's traversal |
duke@435 | 1047 | // count can be greater than the stack traversal count before it hits the |
duke@435 | 1048 | // nmethod for the second time. |
duke@435 | 1049 | return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); |
duke@435 | 1050 | } |
duke@435 | 1051 | |
duke@435 | 1052 | void nmethod::inc_decompile_count() { |
duke@435 | 1053 | // Could be gated by ProfileTraps, but do not bother... |
duke@435 | 1054 | methodOop m = method(); |
duke@435 | 1055 | if (m == NULL) return; |
duke@435 | 1056 | methodDataOop mdo = m->method_data(); |
duke@435 | 1057 | if (mdo == NULL) return; |
duke@435 | 1058 | // There is a benign race here. See comments in methodDataOop.hpp. |
duke@435 | 1059 | mdo->inc_decompile_count(); |
duke@435 | 1060 | } |
duke@435 | 1061 | |
duke@435 | 1062 | void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { |
duke@435 | 1063 | |
duke@435 | 1064 | post_compiled_method_unload(); |
duke@435 | 1065 | |
duke@435 | 1066 | // Since this nmethod is being unloaded, make sure that dependencies |
duke@435 | 1067 | // recorded in instanceKlasses get flushed and pass non-NULL closure to |
duke@435 | 1068 | // indicate that this work is being done during a GC. |
duke@435 | 1069 | assert(Universe::heap()->is_gc_active(), "should only be called during gc"); |
duke@435 | 1070 | assert(is_alive != NULL, "Should be non-NULL"); |
duke@435 | 1071 | // A non-NULL is_alive closure indicates that this is being called during GC. |
duke@435 | 1072 | flush_dependencies(is_alive); |
duke@435 | 1073 | |
duke@435 | 1074 | // Break cycle between nmethod & method |
duke@435 | 1075 | if (TraceClassUnloading && WizardMode) { |
duke@435 | 1076 | tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT |
duke@435 | 1077 | " unloadable], methodOop(" INTPTR_FORMAT |
duke@435 | 1078 | "), cause(" INTPTR_FORMAT ")", |
duke@435 | 1079 | this, (address)_method, (address)cause); |
duke@435 | 1080 | cause->klass()->print(); |
duke@435 | 1081 | } |
duke@435 | 1082 | // If _method is already NULL the methodOop is about to be unloaded, |
duke@435 | 1083 | // so we don't have to break the cycle. Note that it is possible to |
duke@435 | 1084 | // have the methodOop live here, in case we unload the nmethod because |
duke@435 | 1085 | // it is pointing to some oop (other than the methodOop) being unloaded. |
duke@435 | 1086 | if (_method != NULL) { |
duke@435 | 1087 | // OSR methods point to the methodOop, but the methodOop does not |
duke@435 | 1088 | // point back! |
duke@435 | 1089 | if (_method->code() == this) { |
duke@435 | 1090 | _method->clear_code(); // Break a cycle |
duke@435 | 1091 | } |
duke@435 | 1092 | inc_decompile_count(); // Last chance to make a mark on the MDO |
duke@435 | 1093 | _method = NULL; // Clear the method of this dead nmethod |
duke@435 | 1094 | } |
duke@435 | 1095 | // Make the class unloaded - i.e., change state and notify sweeper |
duke@435 | 1096 | check_safepoint(); |
duke@435 | 1097 | if (is_in_use()) { |
duke@435 | 1098 | // Transitioning directly from live to unloaded -- so |
duke@435 | 1099 | // we need to force a cache clean-up; remember this |
duke@435 | 1100 | // for later on. |
duke@435 | 1101 | CodeCache::set_needs_cache_clean(true); |
duke@435 | 1102 | } |
duke@435 | 1103 | flags.state = unloaded; |
duke@435 | 1104 | |
duke@435 | 1105 | // The methodOop is gone at this point |
duke@435 | 1106 | assert(_method == NULL, "Tautology"); |
duke@435 | 1107 | |
duke@435 | 1108 | set_link(NULL); |
duke@435 | 1109 | NMethodSweeper::notify(this); |
duke@435 | 1110 | } |
duke@435 | 1111 | |
duke@435 | 1112 | void nmethod::invalidate_osr_method() { |
duke@435 | 1113 | assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); |
duke@435 | 1114 | if (_entry_bci != InvalidOSREntryBci) |
duke@435 | 1115 | inc_decompile_count(); |
duke@435 | 1116 | // Remove from list of active nmethods |
duke@435 | 1117 | if (method() != NULL) |
duke@435 | 1118 | instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); |
duke@435 | 1119 | // Set entry as invalid |
duke@435 | 1120 | _entry_bci = InvalidOSREntryBci; |
duke@435 | 1121 | } |
duke@435 | 1122 | |
duke@435 | 1123 | void nmethod::log_state_change(int state) const { |
duke@435 | 1124 | if (LogCompilation) { |
duke@435 | 1125 | if (xtty != NULL) { |
duke@435 | 1126 | ttyLocker ttyl; // keep the following output all in one block |
duke@435 | 1127 | xtty->begin_elem("make_not_entrant %sthread='" UINTX_FORMAT "'", |
duke@435 | 1128 | (state == zombie ? "zombie='1' " : ""), |
duke@435 | 1129 | os::current_thread_id()); |
duke@435 | 1130 | log_identity(xtty); |
duke@435 | 1131 | xtty->stamp(); |
duke@435 | 1132 | xtty->end_elem(); |
duke@435 | 1133 | } |
duke@435 | 1134 | } |
duke@435 | 1135 | if (PrintCompilation) { |
duke@435 | 1136 | print_on(tty, state == zombie ? "made zombie " : "made not entrant "); |
duke@435 | 1137 | tty->cr(); |
duke@435 | 1138 | } |
duke@435 | 1139 | } |
duke@435 | 1140 | |
duke@435 | 1141 | // Common functionality for both make_not_entrant and make_zombie |
duke@435 | 1142 | void nmethod::make_not_entrant_or_zombie(int state) { |
duke@435 | 1143 | assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
duke@435 | 1144 | |
duke@435 | 1145 | // Code for an on-stack-replacement nmethod is removed when a class gets unloaded. |
duke@435 | 1146 | // They never become zombie/non-entrant, so the nmethod sweeper will never remove |
duke@435 | 1147 | // them. Instead the entry_bci is set to InvalidOSREntryBci, so the osr nmethod |
duke@435 | 1148 | // will never be used anymore. That the nmethods only gets removed when class unloading |
duke@435 | 1149 | // happens, make life much simpler, since the nmethods are not just going to disappear |
duke@435 | 1150 | // out of the blue. |
duke@435 | 1151 | if (is_osr_only_method()) { |
duke@435 | 1152 | if (osr_entry_bci() != InvalidOSREntryBci) { |
duke@435 | 1153 | // only log this once |
duke@435 | 1154 | log_state_change(state); |
duke@435 | 1155 | } |
duke@435 | 1156 | invalidate_osr_method(); |
duke@435 | 1157 | return; |
duke@435 | 1158 | } |
duke@435 | 1159 | |
duke@435 | 1160 | // If the method is already zombie or set to the state we want, nothing to do |
duke@435 | 1161 | if (is_zombie() || (state == not_entrant && is_not_entrant())) { |
duke@435 | 1162 | return; |
duke@435 | 1163 | } |
duke@435 | 1164 | |
duke@435 | 1165 | log_state_change(state); |
duke@435 | 1166 | |
duke@435 | 1167 | // Make sure the nmethod is not flushed in case of a safepoint in code below. |
duke@435 | 1168 | nmethodLocker nml(this); |
duke@435 | 1169 | |
duke@435 | 1170 | { |
duke@435 | 1171 | // Enter critical section. Does not block for safepoint. |
duke@435 | 1172 | MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); |
duke@435 | 1173 | // The caller can be calling the method statically or through an inline |
duke@435 | 1174 | // cache call. |
duke@435 | 1175 | if (!is_not_entrant()) { |
duke@435 | 1176 | NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
duke@435 | 1177 | SharedRuntime::get_handle_wrong_method_stub()); |
duke@435 | 1178 | assert (NativeJump::instruction_size == nmethod::_zombie_instruction_size, ""); |
duke@435 | 1179 | } |
duke@435 | 1180 | |
duke@435 | 1181 | // When the nmethod becomes zombie it is no longer alive so the |
duke@435 | 1182 | // dependencies must be flushed. nmethods in the not_entrant |
duke@435 | 1183 | // state will be flushed later when the transition to zombie |
duke@435 | 1184 | // happens or they get unloaded. |
duke@435 | 1185 | if (state == zombie) { |
duke@435 | 1186 | assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); |
duke@435 | 1187 | flush_dependencies(NULL); |
duke@435 | 1188 | } else { |
duke@435 | 1189 | assert(state == not_entrant, "other cases may need to be handled differently"); |
duke@435 | 1190 | } |
duke@435 | 1191 | |
duke@435 | 1192 | // Change state |
duke@435 | 1193 | flags.state = state; |
duke@435 | 1194 | } // leave critical region under Patching_lock |
duke@435 | 1195 | |
duke@435 | 1196 | if (state == not_entrant) { |
duke@435 | 1197 | Events::log("Make nmethod not entrant " INTPTR_FORMAT, this); |
duke@435 | 1198 | } else { |
duke@435 | 1199 | Events::log("Make nmethod zombie " INTPTR_FORMAT, this); |
duke@435 | 1200 | } |
duke@435 | 1201 | |
duke@435 | 1202 | if (TraceCreateZombies) { |
duke@435 | 1203 | tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); |
duke@435 | 1204 | } |
duke@435 | 1205 | |
duke@435 | 1206 | // Make sweeper aware that there is a zombie method that needs to be removed |
duke@435 | 1207 | NMethodSweeper::notify(this); |
duke@435 | 1208 | |
duke@435 | 1209 | // not_entrant only stuff |
duke@435 | 1210 | if (state == not_entrant) { |
duke@435 | 1211 | mark_as_seen_on_stack(); |
duke@435 | 1212 | } |
duke@435 | 1213 | |
duke@435 | 1214 | // It's a true state change, so mark the method as decompiled. |
duke@435 | 1215 | inc_decompile_count(); |
duke@435 | 1216 | |
duke@435 | 1217 | |
duke@435 | 1218 | // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event |
duke@435 | 1219 | // and it hasn't already been reported for this nmethod then report it now. |
duke@435 | 1220 | // (the event may have been reported earilier if the GC marked it for unloading). |
duke@435 | 1221 | if (state == zombie) { |
duke@435 | 1222 | |
duke@435 | 1223 | DTRACE_METHOD_UNLOAD_PROBE(method()); |
duke@435 | 1224 | |
duke@435 | 1225 | if (JvmtiExport::should_post_compiled_method_unload() && |
duke@435 | 1226 | !unload_reported()) { |
duke@435 | 1227 | assert(method() != NULL, "checking"); |
duke@435 | 1228 | { |
duke@435 | 1229 | HandleMark hm; |
duke@435 | 1230 | JvmtiExport::post_compiled_method_unload_at_safepoint( |
duke@435 | 1231 | method()->jmethod_id(), code_begin()); |
duke@435 | 1232 | } |
duke@435 | 1233 | set_unload_reported(); |
duke@435 | 1234 | } |
duke@435 | 1235 | } |
duke@435 | 1236 | |
duke@435 | 1237 | |
duke@435 | 1238 | // Zombie only stuff |
duke@435 | 1239 | if (state == zombie) { |
duke@435 | 1240 | VTune::delete_nmethod(this); |
duke@435 | 1241 | } |
duke@435 | 1242 | |
duke@435 | 1243 | // Check whether method got unloaded at a safepoint before this, |
duke@435 | 1244 | // if so we can skip the flushing steps below |
duke@435 | 1245 | if (method() == NULL) return; |
duke@435 | 1246 | |
duke@435 | 1247 | // Remove nmethod from method. |
duke@435 | 1248 | // We need to check if both the _code and _from_compiled_code_entry_point |
duke@435 | 1249 | // refer to this nmethod because there is a race in setting these two fields |
duke@435 | 1250 | // in methodOop as seen in bugid 4947125. |
duke@435 | 1251 | // If the vep() points to the zombie nmethod, the memory for the nmethod |
duke@435 | 1252 | // could be flushed and the compiler and vtable stubs could still call |
duke@435 | 1253 | // through it. |
duke@435 | 1254 | if (method()->code() == this || |
duke@435 | 1255 | method()->from_compiled_entry() == verified_entry_point()) { |
duke@435 | 1256 | HandleMark hm; |
duke@435 | 1257 | method()->clear_code(); |
duke@435 | 1258 | } |
duke@435 | 1259 | } |
duke@435 | 1260 | |
duke@435 | 1261 | |
duke@435 | 1262 | #ifndef PRODUCT |
duke@435 | 1263 | void nmethod::check_safepoint() { |
duke@435 | 1264 | assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
duke@435 | 1265 | } |
duke@435 | 1266 | #endif |
duke@435 | 1267 | |
duke@435 | 1268 | |
duke@435 | 1269 | void nmethod::flush() { |
duke@435 | 1270 | // Note that there are no valid oops in the nmethod anymore. |
duke@435 | 1271 | assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); |
duke@435 | 1272 | assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); |
duke@435 | 1273 | |
duke@435 | 1274 | assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); |
duke@435 | 1275 | check_safepoint(); |
duke@435 | 1276 | |
duke@435 | 1277 | // completely deallocate this method |
duke@435 | 1278 | EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); |
duke@435 | 1279 | if (PrintMethodFlushing) { |
duke@435 | 1280 | tty->print_cr("*flushing nmethod " INTPTR_FORMAT ". Live blobs: %d", this, CodeCache::nof_blobs()); |
duke@435 | 1281 | } |
duke@435 | 1282 | |
duke@435 | 1283 | // We need to deallocate any ExceptionCache data. |
duke@435 | 1284 | // Note that we do not need to grab the nmethod lock for this, it |
duke@435 | 1285 | // better be thread safe if we're disposing of it! |
duke@435 | 1286 | ExceptionCache* ec = exception_cache(); |
duke@435 | 1287 | set_exception_cache(NULL); |
duke@435 | 1288 | while(ec != NULL) { |
duke@435 | 1289 | ExceptionCache* next = ec->next(); |
duke@435 | 1290 | delete ec; |
duke@435 | 1291 | ec = next; |
duke@435 | 1292 | } |
duke@435 | 1293 | |
duke@435 | 1294 | ((CodeBlob*)(this))->flush(); |
duke@435 | 1295 | |
duke@435 | 1296 | CodeCache::free(this); |
duke@435 | 1297 | } |
duke@435 | 1298 | |
duke@435 | 1299 | |
duke@435 | 1300 | // |
duke@435 | 1301 | // Notify all classes this nmethod is dependent on that it is no |
duke@435 | 1302 | // longer dependent. This should only be called in two situations. |
duke@435 | 1303 | // First, when a nmethod transitions to a zombie all dependents need |
duke@435 | 1304 | // to be clear. Since zombification happens at a safepoint there's no |
duke@435 | 1305 | // synchronization issues. The second place is a little more tricky. |
duke@435 | 1306 | // During phase 1 of mark sweep class unloading may happen and as a |
duke@435 | 1307 | // result some nmethods may get unloaded. In this case the flushing |
duke@435 | 1308 | // of dependencies must happen during phase 1 since after GC any |
duke@435 | 1309 | // dependencies in the unloaded nmethod won't be updated, so |
duke@435 | 1310 | // traversing the dependency information in unsafe. In that case this |
duke@435 | 1311 | // function is called with a non-NULL argument and this function only |
duke@435 | 1312 | // notifies instanceKlasses that are reachable |
duke@435 | 1313 | |
duke@435 | 1314 | void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { |
duke@435 | 1315 | assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); |
duke@435 | 1316 | assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
duke@435 | 1317 | "is_alive is non-NULL if and only if we are called during GC"); |
duke@435 | 1318 | if (!has_flushed_dependencies()) { |
duke@435 | 1319 | set_has_flushed_dependencies(); |
duke@435 | 1320 | for (Dependencies::DepStream deps(this); deps.next(); ) { |
duke@435 | 1321 | klassOop klass = deps.context_type(); |
duke@435 | 1322 | if (klass == NULL) continue; // ignore things like evol_method |
duke@435 | 1323 | |
duke@435 | 1324 | // During GC the is_alive closure is non-NULL, and is used to |
duke@435 | 1325 | // determine liveness of dependees that need to be updated. |
duke@435 | 1326 | if (is_alive == NULL || is_alive->do_object_b(klass)) { |
duke@435 | 1327 | instanceKlass::cast(klass)->remove_dependent_nmethod(this); |
duke@435 | 1328 | } |
duke@435 | 1329 | } |
duke@435 | 1330 | } |
duke@435 | 1331 | } |
duke@435 | 1332 | |
duke@435 | 1333 | |
duke@435 | 1334 | // If this oop is not live, the nmethod can be unloaded. |
duke@435 | 1335 | bool nmethod::can_unload(BoolObjectClosure* is_alive, |
duke@435 | 1336 | OopClosure* keep_alive, |
duke@435 | 1337 | oop* root, bool unloading_occurred) { |
duke@435 | 1338 | assert(root != NULL, "just checking"); |
duke@435 | 1339 | oop obj = *root; |
duke@435 | 1340 | if (obj == NULL || is_alive->do_object_b(obj)) { |
duke@435 | 1341 | return false; |
duke@435 | 1342 | } |
duke@435 | 1343 | if (obj->is_compiledICHolder()) { |
duke@435 | 1344 | compiledICHolderOop cichk_oop = compiledICHolderOop(obj); |
duke@435 | 1345 | if (is_alive->do_object_b( |
duke@435 | 1346 | cichk_oop->holder_method()->method_holder()) && |
duke@435 | 1347 | is_alive->do_object_b(cichk_oop->holder_klass())) { |
duke@435 | 1348 | // The oop should be kept alive |
duke@435 | 1349 | keep_alive->do_oop(root); |
duke@435 | 1350 | return false; |
duke@435 | 1351 | } |
duke@435 | 1352 | } |
jcoomes@809 | 1353 | assert(unloading_occurred, "Inconsistency in unloading"); |
duke@435 | 1354 | make_unloaded(is_alive, obj); |
duke@435 | 1355 | return true; |
duke@435 | 1356 | } |
duke@435 | 1357 | |
duke@435 | 1358 | // ------------------------------------------------------------------ |
duke@435 | 1359 | // post_compiled_method_load_event |
duke@435 | 1360 | // new method for install_code() path |
duke@435 | 1361 | // Transfer information from compilation to jvmti |
duke@435 | 1362 | void nmethod::post_compiled_method_load_event() { |
duke@435 | 1363 | |
duke@435 | 1364 | methodOop moop = method(); |
duke@435 | 1365 | HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
duke@435 | 1366 | moop->klass_name()->bytes(), |
duke@435 | 1367 | moop->klass_name()->utf8_length(), |
duke@435 | 1368 | moop->name()->bytes(), |
duke@435 | 1369 | moop->name()->utf8_length(), |
duke@435 | 1370 | moop->signature()->bytes(), |
duke@435 | 1371 | moop->signature()->utf8_length(), |
duke@435 | 1372 | code_begin(), code_size()); |
duke@435 | 1373 | |
duke@435 | 1374 | if (JvmtiExport::should_post_compiled_method_load()) { |
duke@435 | 1375 | JvmtiExport::post_compiled_method_load(this); |
duke@435 | 1376 | } |
duke@435 | 1377 | } |
duke@435 | 1378 | |
duke@435 | 1379 | void nmethod::post_compiled_method_unload() { |
duke@435 | 1380 | assert(_method != NULL && !is_unloaded(), "just checking"); |
duke@435 | 1381 | DTRACE_METHOD_UNLOAD_PROBE(method()); |
duke@435 | 1382 | |
duke@435 | 1383 | // If a JVMTI agent has enabled the CompiledMethodUnload event then |
duke@435 | 1384 | // post the event. Sometime later this nmethod will be made a zombie by |
duke@435 | 1385 | // the sweeper but the methodOop will not be valid at that point. |
duke@435 | 1386 | if (JvmtiExport::should_post_compiled_method_unload()) { |
duke@435 | 1387 | assert(!unload_reported(), "already unloaded"); |
duke@435 | 1388 | HandleMark hm; |
duke@435 | 1389 | JvmtiExport::post_compiled_method_unload_at_safepoint( |
duke@435 | 1390 | method()->jmethod_id(), code_begin()); |
duke@435 | 1391 | } |
duke@435 | 1392 | |
duke@435 | 1393 | // The JVMTI CompiledMethodUnload event can be enabled or disabled at |
duke@435 | 1394 | // any time. As the nmethod is being unloaded now we mark it has |
duke@435 | 1395 | // having the unload event reported - this will ensure that we don't |
duke@435 | 1396 | // attempt to report the event in the unlikely scenario where the |
duke@435 | 1397 | // event is enabled at the time the nmethod is made a zombie. |
duke@435 | 1398 | set_unload_reported(); |
duke@435 | 1399 | } |
duke@435 | 1400 | |
duke@435 | 1401 | // This is called at the end of the strong tracing/marking phase of a |
duke@435 | 1402 | // GC to unload an nmethod if it contains otherwise unreachable |
duke@435 | 1403 | // oops. |
duke@435 | 1404 | |
duke@435 | 1405 | void nmethod::do_unloading(BoolObjectClosure* is_alive, |
duke@435 | 1406 | OopClosure* keep_alive, bool unloading_occurred) { |
duke@435 | 1407 | // Make sure the oop's ready to receive visitors |
duke@435 | 1408 | assert(!is_zombie() && !is_unloaded(), |
duke@435 | 1409 | "should not call follow on zombie or unloaded nmethod"); |
duke@435 | 1410 | |
duke@435 | 1411 | // If the method is not entrant then a JMP is plastered over the |
duke@435 | 1412 | // first few bytes. If an oop in the old code was there, that oop |
duke@435 | 1413 | // should not get GC'd. Skip the first few bytes of oops on |
duke@435 | 1414 | // not-entrant methods. |
duke@435 | 1415 | address low_boundary = verified_entry_point(); |
duke@435 | 1416 | if (is_not_entrant()) { |
duke@435 | 1417 | low_boundary += NativeJump::instruction_size; |
duke@435 | 1418 | // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
duke@435 | 1419 | // (See comment above.) |
duke@435 | 1420 | } |
duke@435 | 1421 | |
duke@435 | 1422 | // The RedefineClasses() API can cause the class unloading invariant |
duke@435 | 1423 | // to no longer be true. See jvmtiExport.hpp for details. |
duke@435 | 1424 | // Also, leave a debugging breadcrumb in local flag. |
duke@435 | 1425 | bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); |
duke@435 | 1426 | if (a_class_was_redefined) { |
duke@435 | 1427 | // This set of the unloading_occurred flag is done before the |
duke@435 | 1428 | // call to post_compiled_method_unload() so that the unloading |
duke@435 | 1429 | // of this nmethod is reported. |
duke@435 | 1430 | unloading_occurred = true; |
duke@435 | 1431 | } |
duke@435 | 1432 | |
duke@435 | 1433 | // Follow methodOop |
duke@435 | 1434 | if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { |
duke@435 | 1435 | return; |
duke@435 | 1436 | } |
duke@435 | 1437 | |
duke@435 | 1438 | // Exception cache |
duke@435 | 1439 | ExceptionCache* ec = exception_cache(); |
duke@435 | 1440 | while (ec != NULL) { |
duke@435 | 1441 | oop* ex_addr = (oop*)ec->exception_type_addr(); |
duke@435 | 1442 | oop ex = *ex_addr; |
duke@435 | 1443 | ExceptionCache* next_ec = ec->next(); |
duke@435 | 1444 | if (ex != NULL && !is_alive->do_object_b(ex)) { |
duke@435 | 1445 | assert(!ex->is_compiledICHolder(), "Possible error here"); |
duke@435 | 1446 | remove_from_exception_cache(ec); |
duke@435 | 1447 | } |
duke@435 | 1448 | ec = next_ec; |
duke@435 | 1449 | } |
duke@435 | 1450 | |
duke@435 | 1451 | // If class unloading occurred we first iterate over all inline caches and |
duke@435 | 1452 | // clear ICs where the cached oop is referring to an unloaded klass or method. |
duke@435 | 1453 | // The remaining live cached oops will be traversed in the relocInfo::oop_type |
duke@435 | 1454 | // iteration below. |
duke@435 | 1455 | if (unloading_occurred) { |
duke@435 | 1456 | RelocIterator iter(this, low_boundary); |
duke@435 | 1457 | while(iter.next()) { |
duke@435 | 1458 | if (iter.type() == relocInfo::virtual_call_type) { |
duke@435 | 1459 | CompiledIC *ic = CompiledIC_at(iter.reloc()); |
duke@435 | 1460 | oop ic_oop = ic->cached_oop(); |
duke@435 | 1461 | if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { |
duke@435 | 1462 | // The only exception is compiledICHolder oops which may |
duke@435 | 1463 | // yet be marked below. (We check this further below). |
duke@435 | 1464 | if (ic_oop->is_compiledICHolder()) { |
duke@435 | 1465 | compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); |
duke@435 | 1466 | if (is_alive->do_object_b( |
duke@435 | 1467 | cichk_oop->holder_method()->method_holder()) && |
duke@435 | 1468 | is_alive->do_object_b(cichk_oop->holder_klass())) { |
duke@435 | 1469 | continue; |
duke@435 | 1470 | } |
duke@435 | 1471 | } |
duke@435 | 1472 | ic->set_to_clean(); |
duke@435 | 1473 | assert(ic->cached_oop() == NULL, "cached oop in IC should be cleared") |
duke@435 | 1474 | } |
duke@435 | 1475 | } |
duke@435 | 1476 | } |
duke@435 | 1477 | } |
duke@435 | 1478 | |
duke@435 | 1479 | // Compiled code |
duke@435 | 1480 | RelocIterator iter(this, low_boundary); |
duke@435 | 1481 | while (iter.next()) { |
duke@435 | 1482 | if (iter.type() == relocInfo::oop_type) { |
duke@435 | 1483 | oop_Relocation* r = iter.oop_reloc(); |
duke@435 | 1484 | // In this loop, we must only traverse those oops directly embedded in |
duke@435 | 1485 | // the code. Other oops (oop_index>0) are seen as part of scopes_oops. |
duke@435 | 1486 | assert(1 == (r->oop_is_immediate()) + |
duke@435 | 1487 | (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), |
duke@435 | 1488 | "oop must be found in exactly one place"); |
duke@435 | 1489 | if (r->oop_is_immediate() && r->oop_value() != NULL) { |
duke@435 | 1490 | if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { |
duke@435 | 1491 | return; |
duke@435 | 1492 | } |
duke@435 | 1493 | } |
duke@435 | 1494 | } |
duke@435 | 1495 | } |
duke@435 | 1496 | |
duke@435 | 1497 | |
duke@435 | 1498 | // Scopes |
duke@435 | 1499 | for (oop* p = oops_begin(); p < oops_end(); p++) { |
duke@435 | 1500 | if (*p == Universe::non_oop_word()) continue; // skip non-oops |
duke@435 | 1501 | if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { |
duke@435 | 1502 | return; |
duke@435 | 1503 | } |
duke@435 | 1504 | } |
duke@435 | 1505 | |
duke@435 | 1506 | #ifndef PRODUCT |
duke@435 | 1507 | // This nmethod was not unloaded; check below that all CompiledICs |
duke@435 | 1508 | // refer to marked oops. |
duke@435 | 1509 | { |
duke@435 | 1510 | RelocIterator iter(this, low_boundary); |
duke@435 | 1511 | while (iter.next()) { |
duke@435 | 1512 | if (iter.type() == relocInfo::virtual_call_type) { |
duke@435 | 1513 | CompiledIC *ic = CompiledIC_at(iter.reloc()); |
duke@435 | 1514 | oop ic_oop = ic->cached_oop(); |
duke@435 | 1515 | assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), |
duke@435 | 1516 | "Found unmarked ic_oop in reachable nmethod"); |
duke@435 | 1517 | } |
duke@435 | 1518 | } |
duke@435 | 1519 | } |
duke@435 | 1520 | #endif // !PRODUCT |
duke@435 | 1521 | } |
duke@435 | 1522 | |
duke@435 | 1523 | void nmethod::oops_do(OopClosure* f) { |
duke@435 | 1524 | // make sure the oops ready to receive visitors |
duke@435 | 1525 | assert(!is_zombie() && !is_unloaded(), |
duke@435 | 1526 | "should not call follow on zombie or unloaded nmethod"); |
duke@435 | 1527 | |
duke@435 | 1528 | // If the method is not entrant or zombie then a JMP is plastered over the |
duke@435 | 1529 | // first few bytes. If an oop in the old code was there, that oop |
duke@435 | 1530 | // should not get GC'd. Skip the first few bytes of oops on |
duke@435 | 1531 | // not-entrant methods. |
duke@435 | 1532 | address low_boundary = verified_entry_point(); |
duke@435 | 1533 | if (is_not_entrant()) { |
duke@435 | 1534 | low_boundary += NativeJump::instruction_size; |
duke@435 | 1535 | // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
duke@435 | 1536 | // (See comment above.) |
duke@435 | 1537 | } |
duke@435 | 1538 | |
duke@435 | 1539 | // Compiled code |
duke@435 | 1540 | f->do_oop((oop*) &_method); |
duke@435 | 1541 | ExceptionCache* ec = exception_cache(); |
duke@435 | 1542 | while(ec != NULL) { |
duke@435 | 1543 | f->do_oop((oop*)ec->exception_type_addr()); |
duke@435 | 1544 | ec = ec->next(); |
duke@435 | 1545 | } |
duke@435 | 1546 | |
duke@435 | 1547 | RelocIterator iter(this, low_boundary); |
duke@435 | 1548 | while (iter.next()) { |
duke@435 | 1549 | if (iter.type() == relocInfo::oop_type ) { |
duke@435 | 1550 | oop_Relocation* r = iter.oop_reloc(); |
duke@435 | 1551 | // In this loop, we must only follow those oops directly embedded in |
duke@435 | 1552 | // the code. Other oops (oop_index>0) are seen as part of scopes_oops. |
duke@435 | 1553 | assert(1 == (r->oop_is_immediate()) + (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), "oop must be found in exactly one place"); |
duke@435 | 1554 | if (r->oop_is_immediate() && r->oop_value() != NULL) { |
duke@435 | 1555 | f->do_oop(r->oop_addr()); |
duke@435 | 1556 | } |
duke@435 | 1557 | } |
duke@435 | 1558 | } |
duke@435 | 1559 | |
duke@435 | 1560 | // Scopes |
duke@435 | 1561 | for (oop* p = oops_begin(); p < oops_end(); p++) { |
duke@435 | 1562 | if (*p == Universe::non_oop_word()) continue; // skip non-oops |
duke@435 | 1563 | f->do_oop(p); |
duke@435 | 1564 | } |
duke@435 | 1565 | } |
duke@435 | 1566 | |
duke@435 | 1567 | // Method that knows how to preserve outgoing arguments at call. This method must be |
duke@435 | 1568 | // called with a frame corresponding to a Java invoke |
duke@435 | 1569 | void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { |
duke@435 | 1570 | if (!method()->is_native()) { |
duke@435 | 1571 | SimpleScopeDesc ssd(this, fr.pc()); |
duke@435 | 1572 | Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); |
duke@435 | 1573 | bool is_static = call->is_invokestatic(); |
duke@435 | 1574 | symbolOop signature = call->signature(); |
duke@435 | 1575 | fr.oops_compiled_arguments_do(signature, is_static, reg_map, f); |
duke@435 | 1576 | } |
duke@435 | 1577 | } |
duke@435 | 1578 | |
duke@435 | 1579 | |
duke@435 | 1580 | oop nmethod::embeddedOop_at(u_char* p) { |
duke@435 | 1581 | RelocIterator iter(this, p, p + oopSize); |
duke@435 | 1582 | while (iter.next()) |
duke@435 | 1583 | if (iter.type() == relocInfo::oop_type) { |
duke@435 | 1584 | return iter.oop_reloc()->oop_value(); |
duke@435 | 1585 | } |
duke@435 | 1586 | return NULL; |
duke@435 | 1587 | } |
duke@435 | 1588 | |
duke@435 | 1589 | |
duke@435 | 1590 | inline bool includes(void* p, void* from, void* to) { |
duke@435 | 1591 | return from <= p && p < to; |
duke@435 | 1592 | } |
duke@435 | 1593 | |
duke@435 | 1594 | |
duke@435 | 1595 | void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { |
duke@435 | 1596 | assert(count >= 2, "must be sentinel values, at least"); |
duke@435 | 1597 | |
duke@435 | 1598 | #ifdef ASSERT |
duke@435 | 1599 | // must be sorted and unique; we do a binary search in find_pc_desc() |
duke@435 | 1600 | int prev_offset = pcs[0].pc_offset(); |
duke@435 | 1601 | assert(prev_offset == PcDesc::lower_offset_limit, |
duke@435 | 1602 | "must start with a sentinel"); |
duke@435 | 1603 | for (int i = 1; i < count; i++) { |
duke@435 | 1604 | int this_offset = pcs[i].pc_offset(); |
duke@435 | 1605 | assert(this_offset > prev_offset, "offsets must be sorted"); |
duke@435 | 1606 | prev_offset = this_offset; |
duke@435 | 1607 | } |
duke@435 | 1608 | assert(prev_offset == PcDesc::upper_offset_limit, |
duke@435 | 1609 | "must end with a sentinel"); |
duke@435 | 1610 | #endif //ASSERT |
duke@435 | 1611 | |
duke@435 | 1612 | int size = count * sizeof(PcDesc); |
duke@435 | 1613 | assert(scopes_pcs_size() >= size, "oob"); |
duke@435 | 1614 | memcpy(scopes_pcs_begin(), pcs, size); |
duke@435 | 1615 | |
duke@435 | 1616 | // Adjust the final sentinel downward. |
duke@435 | 1617 | PcDesc* last_pc = &scopes_pcs_begin()[count-1]; |
duke@435 | 1618 | assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); |
duke@435 | 1619 | last_pc->set_pc_offset(instructions_size() + 1); |
duke@435 | 1620 | for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
duke@435 | 1621 | // Fill any rounding gaps with copies of the last record. |
duke@435 | 1622 | last_pc[1] = last_pc[0]; |
duke@435 | 1623 | } |
duke@435 | 1624 | // The following assert could fail if sizeof(PcDesc) is not |
duke@435 | 1625 | // an integral multiple of oopSize (the rounding term). |
duke@435 | 1626 | // If it fails, change the logic to always allocate a multiple |
duke@435 | 1627 | // of sizeof(PcDesc), and fill unused words with copies of *last_pc. |
duke@435 | 1628 | assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); |
duke@435 | 1629 | } |
duke@435 | 1630 | |
duke@435 | 1631 | void nmethod::copy_scopes_data(u_char* buffer, int size) { |
duke@435 | 1632 | assert(scopes_data_size() >= size, "oob"); |
duke@435 | 1633 | memcpy(scopes_data_begin(), buffer, size); |
duke@435 | 1634 | } |
duke@435 | 1635 | |
duke@435 | 1636 | |
duke@435 | 1637 | #ifdef ASSERT |
duke@435 | 1638 | static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { |
duke@435 | 1639 | PcDesc* lower = nm->scopes_pcs_begin(); |
duke@435 | 1640 | PcDesc* upper = nm->scopes_pcs_end(); |
duke@435 | 1641 | lower += 1; // exclude initial sentinel |
duke@435 | 1642 | PcDesc* res = NULL; |
duke@435 | 1643 | for (PcDesc* p = lower; p < upper; p++) { |
duke@435 | 1644 | NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc |
duke@435 | 1645 | if (match_desc(p, pc_offset, approximate)) { |
duke@435 | 1646 | if (res == NULL) |
duke@435 | 1647 | res = p; |
duke@435 | 1648 | else |
duke@435 | 1649 | res = (PcDesc*) badAddress; |
duke@435 | 1650 | } |
duke@435 | 1651 | } |
duke@435 | 1652 | return res; |
duke@435 | 1653 | } |
duke@435 | 1654 | #endif |
duke@435 | 1655 | |
duke@435 | 1656 | |
duke@435 | 1657 | // Finds a PcDesc with real-pc equal to "pc" |
duke@435 | 1658 | PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { |
duke@435 | 1659 | address base_address = instructions_begin(); |
duke@435 | 1660 | if ((pc < base_address) || |
duke@435 | 1661 | (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { |
duke@435 | 1662 | return NULL; // PC is wildly out of range |
duke@435 | 1663 | } |
duke@435 | 1664 | int pc_offset = (int) (pc - base_address); |
duke@435 | 1665 | |
duke@435 | 1666 | // Check the PcDesc cache if it contains the desired PcDesc |
duke@435 | 1667 | // (This as an almost 100% hit rate.) |
duke@435 | 1668 | PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); |
duke@435 | 1669 | if (res != NULL) { |
duke@435 | 1670 | assert(res == linear_search(this, pc_offset, approximate), "cache ok"); |
duke@435 | 1671 | return res; |
duke@435 | 1672 | } |
duke@435 | 1673 | |
duke@435 | 1674 | // Fallback algorithm: quasi-linear search for the PcDesc |
duke@435 | 1675 | // Find the last pc_offset less than the given offset. |
duke@435 | 1676 | // The successor must be the required match, if there is a match at all. |
duke@435 | 1677 | // (Use a fixed radix to avoid expensive affine pointer arithmetic.) |
duke@435 | 1678 | PcDesc* lower = scopes_pcs_begin(); |
duke@435 | 1679 | PcDesc* upper = scopes_pcs_end(); |
duke@435 | 1680 | upper -= 1; // exclude final sentinel |
duke@435 | 1681 | if (lower >= upper) return NULL; // native method; no PcDescs at all |
duke@435 | 1682 | |
duke@435 | 1683 | #define assert_LU_OK \ |
duke@435 | 1684 | /* invariant on lower..upper during the following search: */ \ |
duke@435 | 1685 | assert(lower->pc_offset() < pc_offset, "sanity"); \ |
duke@435 | 1686 | assert(upper->pc_offset() >= pc_offset, "sanity") |
duke@435 | 1687 | assert_LU_OK; |
duke@435 | 1688 | |
duke@435 | 1689 | // Use the last successful return as a split point. |
duke@435 | 1690 | PcDesc* mid = _pc_desc_cache.last_pc_desc(); |
duke@435 | 1691 | NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
duke@435 | 1692 | if (mid->pc_offset() < pc_offset) { |
duke@435 | 1693 | lower = mid; |
duke@435 | 1694 | } else { |
duke@435 | 1695 | upper = mid; |
duke@435 | 1696 | } |
duke@435 | 1697 | |
duke@435 | 1698 | // Take giant steps at first (4096, then 256, then 16, then 1) |
duke@435 | 1699 | const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); |
duke@435 | 1700 | const int RADIX = (1 << LOG2_RADIX); |
duke@435 | 1701 | for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { |
duke@435 | 1702 | while ((mid = lower + step) < upper) { |
duke@435 | 1703 | assert_LU_OK; |
duke@435 | 1704 | NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
duke@435 | 1705 | if (mid->pc_offset() < pc_offset) { |
duke@435 | 1706 | lower = mid; |
duke@435 | 1707 | } else { |
duke@435 | 1708 | upper = mid; |
duke@435 | 1709 | break; |
duke@435 | 1710 | } |
duke@435 | 1711 | } |
duke@435 | 1712 | assert_LU_OK; |
duke@435 | 1713 | } |
duke@435 | 1714 | |
duke@435 | 1715 | // Sneak up on the value with a linear search of length ~16. |
duke@435 | 1716 | while (true) { |
duke@435 | 1717 | assert_LU_OK; |
duke@435 | 1718 | mid = lower + 1; |
duke@435 | 1719 | NOT_PRODUCT(++nmethod_stats.pc_desc_searches); |
duke@435 | 1720 | if (mid->pc_offset() < pc_offset) { |
duke@435 | 1721 | lower = mid; |
duke@435 | 1722 | } else { |
duke@435 | 1723 | upper = mid; |
duke@435 | 1724 | break; |
duke@435 | 1725 | } |
duke@435 | 1726 | } |
duke@435 | 1727 | #undef assert_LU_OK |
duke@435 | 1728 | |
duke@435 | 1729 | if (match_desc(upper, pc_offset, approximate)) { |
duke@435 | 1730 | assert(upper == linear_search(this, pc_offset, approximate), "search ok"); |
duke@435 | 1731 | _pc_desc_cache.add_pc_desc(upper); |
duke@435 | 1732 | return upper; |
duke@435 | 1733 | } else { |
duke@435 | 1734 | assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); |
duke@435 | 1735 | return NULL; |
duke@435 | 1736 | } |
duke@435 | 1737 | } |
duke@435 | 1738 | |
duke@435 | 1739 | |
duke@435 | 1740 | bool nmethod::check_all_dependencies() { |
duke@435 | 1741 | bool found_check = false; |
duke@435 | 1742 | // wholesale check of all dependencies |
duke@435 | 1743 | for (Dependencies::DepStream deps(this); deps.next(); ) { |
duke@435 | 1744 | if (deps.check_dependency() != NULL) { |
duke@435 | 1745 | found_check = true; |
duke@435 | 1746 | NOT_DEBUG(break); |
duke@435 | 1747 | } |
duke@435 | 1748 | } |
duke@435 | 1749 | return found_check; // tell caller if we found anything |
duke@435 | 1750 | } |
duke@435 | 1751 | |
duke@435 | 1752 | bool nmethod::check_dependency_on(DepChange& changes) { |
duke@435 | 1753 | // What has happened: |
duke@435 | 1754 | // 1) a new class dependee has been added |
duke@435 | 1755 | // 2) dependee and all its super classes have been marked |
duke@435 | 1756 | bool found_check = false; // set true if we are upset |
duke@435 | 1757 | for (Dependencies::DepStream deps(this); deps.next(); ) { |
duke@435 | 1758 | // Evaluate only relevant dependencies. |
duke@435 | 1759 | if (deps.spot_check_dependency_at(changes) != NULL) { |
duke@435 | 1760 | found_check = true; |
duke@435 | 1761 | NOT_DEBUG(break); |
duke@435 | 1762 | } |
duke@435 | 1763 | } |
duke@435 | 1764 | return found_check; |
duke@435 | 1765 | } |
duke@435 | 1766 | |
duke@435 | 1767 | bool nmethod::is_evol_dependent_on(klassOop dependee) { |
duke@435 | 1768 | instanceKlass *dependee_ik = instanceKlass::cast(dependee); |
duke@435 | 1769 | objArrayOop dependee_methods = dependee_ik->methods(); |
duke@435 | 1770 | for (Dependencies::DepStream deps(this); deps.next(); ) { |
duke@435 | 1771 | if (deps.type() == Dependencies::evol_method) { |
duke@435 | 1772 | methodOop method = deps.method_argument(0); |
duke@435 | 1773 | for (int j = 0; j < dependee_methods->length(); j++) { |
duke@435 | 1774 | if ((methodOop) dependee_methods->obj_at(j) == method) { |
duke@435 | 1775 | // RC_TRACE macro has an embedded ResourceMark |
duke@435 | 1776 | RC_TRACE(0x01000000, |
duke@435 | 1777 | ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", |
duke@435 | 1778 | _method->method_holder()->klass_part()->external_name(), |
duke@435 | 1779 | _method->name()->as_C_string(), |
duke@435 | 1780 | _method->signature()->as_C_string(), compile_id(), |
duke@435 | 1781 | method->method_holder()->klass_part()->external_name(), |
duke@435 | 1782 | method->name()->as_C_string(), |
duke@435 | 1783 | method->signature()->as_C_string())); |
duke@435 | 1784 | if (TraceDependencies || LogCompilation) |
duke@435 | 1785 | deps.log_dependency(dependee); |
duke@435 | 1786 | return true; |
duke@435 | 1787 | } |
duke@435 | 1788 | } |
duke@435 | 1789 | } |
duke@435 | 1790 | } |
duke@435 | 1791 | return false; |
duke@435 | 1792 | } |
duke@435 | 1793 | |
duke@435 | 1794 | // Called from mark_for_deoptimization, when dependee is invalidated. |
duke@435 | 1795 | bool nmethod::is_dependent_on_method(methodOop dependee) { |
duke@435 | 1796 | for (Dependencies::DepStream deps(this); deps.next(); ) { |
duke@435 | 1797 | if (deps.type() != Dependencies::evol_method) |
duke@435 | 1798 | continue; |
duke@435 | 1799 | methodOop method = deps.method_argument(0); |
duke@435 | 1800 | if (method == dependee) return true; |
duke@435 | 1801 | } |
duke@435 | 1802 | return false; |
duke@435 | 1803 | } |
duke@435 | 1804 | |
duke@435 | 1805 | |
duke@435 | 1806 | bool nmethod::is_patchable_at(address instr_addr) { |
duke@435 | 1807 | assert (code_contains(instr_addr), "wrong nmethod used"); |
duke@435 | 1808 | if (is_zombie()) { |
duke@435 | 1809 | // a zombie may never be patched |
duke@435 | 1810 | return false; |
duke@435 | 1811 | } |
duke@435 | 1812 | return true; |
duke@435 | 1813 | } |
duke@435 | 1814 | |
duke@435 | 1815 | |
duke@435 | 1816 | address nmethod::continuation_for_implicit_exception(address pc) { |
duke@435 | 1817 | // Exception happened outside inline-cache check code => we are inside |
duke@435 | 1818 | // an active nmethod => use cpc to determine a return address |
duke@435 | 1819 | int exception_offset = pc - instructions_begin(); |
duke@435 | 1820 | int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
duke@435 | 1821 | #ifdef ASSERT |
duke@435 | 1822 | if (cont_offset == 0) { |
duke@435 | 1823 | Thread* thread = ThreadLocalStorage::get_thread_slow(); |
duke@435 | 1824 | ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY |
duke@435 | 1825 | HandleMark hm(thread); |
duke@435 | 1826 | ResourceMark rm(thread); |
duke@435 | 1827 | CodeBlob* cb = CodeCache::find_blob(pc); |
duke@435 | 1828 | assert(cb != NULL && cb == this, ""); |
duke@435 | 1829 | tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); |
duke@435 | 1830 | print(); |
duke@435 | 1831 | method()->print_codes(); |
duke@435 | 1832 | print_code(); |
duke@435 | 1833 | print_pcs(); |
duke@435 | 1834 | } |
duke@435 | 1835 | #endif |
duke@435 | 1836 | guarantee(cont_offset != 0, "unhandled implicit exception in compiled code"); |
duke@435 | 1837 | return instructions_begin() + cont_offset; |
duke@435 | 1838 | } |
duke@435 | 1839 | |
duke@435 | 1840 | |
duke@435 | 1841 | |
duke@435 | 1842 | void nmethod_init() { |
duke@435 | 1843 | // make sure you didn't forget to adjust the filler fields |
duke@435 | 1844 | assert(sizeof(nmFlags) <= 4, "nmFlags occupies more than a word"); |
duke@435 | 1845 | assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); |
duke@435 | 1846 | } |
duke@435 | 1847 | |
duke@435 | 1848 | |
duke@435 | 1849 | //------------------------------------------------------------------------------------------- |
duke@435 | 1850 | |
duke@435 | 1851 | |
duke@435 | 1852 | // QQQ might we make this work from a frame?? |
duke@435 | 1853 | nmethodLocker::nmethodLocker(address pc) { |
duke@435 | 1854 | CodeBlob* cb = CodeCache::find_blob(pc); |
duke@435 | 1855 | guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); |
duke@435 | 1856 | _nm = (nmethod*)cb; |
duke@435 | 1857 | lock_nmethod(_nm); |
duke@435 | 1858 | } |
duke@435 | 1859 | |
duke@435 | 1860 | void nmethodLocker::lock_nmethod(nmethod* nm) { |
duke@435 | 1861 | if (nm == NULL) return; |
duke@435 | 1862 | Atomic::inc(&nm->_lock_count); |
duke@435 | 1863 | guarantee(!nm->is_zombie(), "cannot lock a zombie method"); |
duke@435 | 1864 | } |
duke@435 | 1865 | |
duke@435 | 1866 | void nmethodLocker::unlock_nmethod(nmethod* nm) { |
duke@435 | 1867 | if (nm == NULL) return; |
duke@435 | 1868 | Atomic::dec(&nm->_lock_count); |
duke@435 | 1869 | guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); |
duke@435 | 1870 | } |
duke@435 | 1871 | |
duke@435 | 1872 | bool nmethod::is_deopt_pc(address pc) { |
duke@435 | 1873 | bool ret = pc == deopt_handler_begin(); |
duke@435 | 1874 | return ret; |
duke@435 | 1875 | } |
duke@435 | 1876 | |
duke@435 | 1877 | |
duke@435 | 1878 | // ----------------------------------------------------------------------------- |
duke@435 | 1879 | // Verification |
duke@435 | 1880 | |
duke@435 | 1881 | void nmethod::verify() { |
duke@435 | 1882 | |
duke@435 | 1883 | // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant |
duke@435 | 1884 | // seems odd. |
duke@435 | 1885 | |
duke@435 | 1886 | if( is_zombie() || is_not_entrant() ) |
duke@435 | 1887 | return; |
duke@435 | 1888 | |
duke@435 | 1889 | // Make sure all the entry points are correctly aligned for patching. |
duke@435 | 1890 | NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); |
duke@435 | 1891 | |
duke@435 | 1892 | assert(method()->is_oop(), "must be valid"); |
duke@435 | 1893 | |
duke@435 | 1894 | ResourceMark rm; |
duke@435 | 1895 | |
duke@435 | 1896 | if (!CodeCache::contains(this)) { |
duke@435 | 1897 | fatal1("nmethod at " INTPTR_FORMAT " not in zone", this); |
duke@435 | 1898 | } |
duke@435 | 1899 | |
duke@435 | 1900 | if(is_native_method() ) |
duke@435 | 1901 | return; |
duke@435 | 1902 | |
duke@435 | 1903 | nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); |
duke@435 | 1904 | if (nm != this) { |
duke@435 | 1905 | fatal1("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", this); |
duke@435 | 1906 | } |
duke@435 | 1907 | |
duke@435 | 1908 | for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
duke@435 | 1909 | if (! p->verify(this)) { |
duke@435 | 1910 | tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); |
duke@435 | 1911 | } |
duke@435 | 1912 | } |
duke@435 | 1913 | |
duke@435 | 1914 | verify_scopes(); |
duke@435 | 1915 | } |
duke@435 | 1916 | |
duke@435 | 1917 | |
duke@435 | 1918 | void nmethod::verify_interrupt_point(address call_site) { |
duke@435 | 1919 | // This code does not work in release mode since |
duke@435 | 1920 | // owns_lock only is available in debug mode. |
duke@435 | 1921 | CompiledIC* ic = NULL; |
duke@435 | 1922 | Thread *cur = Thread::current(); |
duke@435 | 1923 | if (CompiledIC_lock->owner() == cur || |
duke@435 | 1924 | ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
duke@435 | 1925 | SafepointSynchronize::is_at_safepoint())) { |
duke@435 | 1926 | ic = CompiledIC_at(call_site); |
duke@435 | 1927 | CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
duke@435 | 1928 | } else { |
duke@435 | 1929 | MutexLocker ml_verify (CompiledIC_lock); |
duke@435 | 1930 | ic = CompiledIC_at(call_site); |
duke@435 | 1931 | } |
duke@435 | 1932 | PcDesc* pd = pc_desc_at(ic->end_of_call()); |
duke@435 | 1933 | assert(pd != NULL, "PcDesc must exist"); |
duke@435 | 1934 | for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), |
duke@435 | 1935 | pd->obj_decode_offset()); |
duke@435 | 1936 | !sd->is_top(); sd = sd->sender()) { |
duke@435 | 1937 | sd->verify(); |
duke@435 | 1938 | } |
duke@435 | 1939 | } |
duke@435 | 1940 | |
duke@435 | 1941 | void nmethod::verify_scopes() { |
duke@435 | 1942 | if( !method() ) return; // Runtime stubs have no scope |
duke@435 | 1943 | if (method()->is_native()) return; // Ignore stub methods. |
duke@435 | 1944 | // iterate through all interrupt point |
duke@435 | 1945 | // and verify the debug information is valid. |
duke@435 | 1946 | RelocIterator iter((nmethod*)this); |
duke@435 | 1947 | while (iter.next()) { |
duke@435 | 1948 | address stub = NULL; |
duke@435 | 1949 | switch (iter.type()) { |
duke@435 | 1950 | case relocInfo::virtual_call_type: |
duke@435 | 1951 | verify_interrupt_point(iter.addr()); |
duke@435 | 1952 | break; |
duke@435 | 1953 | case relocInfo::opt_virtual_call_type: |
duke@435 | 1954 | stub = iter.opt_virtual_call_reloc()->static_stub(); |
duke@435 | 1955 | verify_interrupt_point(iter.addr()); |
duke@435 | 1956 | break; |
duke@435 | 1957 | case relocInfo::static_call_type: |
duke@435 | 1958 | stub = iter.static_call_reloc()->static_stub(); |
duke@435 | 1959 | //verify_interrupt_point(iter.addr()); |
duke@435 | 1960 | break; |
duke@435 | 1961 | case relocInfo::runtime_call_type: |
duke@435 | 1962 | address destination = iter.reloc()->value(); |
duke@435 | 1963 | // Right now there is no way to find out which entries support |
duke@435 | 1964 | // an interrupt point. It would be nice if we had this |
duke@435 | 1965 | // information in a table. |
duke@435 | 1966 | break; |
duke@435 | 1967 | } |
duke@435 | 1968 | assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); |
duke@435 | 1969 | } |
duke@435 | 1970 | } |
duke@435 | 1971 | |
duke@435 | 1972 | |
duke@435 | 1973 | // ----------------------------------------------------------------------------- |
duke@435 | 1974 | // Non-product code |
duke@435 | 1975 | #ifndef PRODUCT |
duke@435 | 1976 | |
duke@435 | 1977 | void nmethod::check_store() { |
duke@435 | 1978 | // Make sure all oops in the compiled code are tenured |
duke@435 | 1979 | |
duke@435 | 1980 | RelocIterator iter(this); |
duke@435 | 1981 | while (iter.next()) { |
duke@435 | 1982 | if (iter.type() == relocInfo::oop_type) { |
duke@435 | 1983 | oop_Relocation* reloc = iter.oop_reloc(); |
duke@435 | 1984 | oop obj = reloc->oop_value(); |
duke@435 | 1985 | if (obj != NULL && !obj->is_perm()) { |
duke@435 | 1986 | fatal("must be permanent oop in compiled code"); |
duke@435 | 1987 | } |
duke@435 | 1988 | } |
duke@435 | 1989 | } |
duke@435 | 1990 | } |
duke@435 | 1991 | |
jrose@535 | 1992 | #endif // PRODUCT |
duke@435 | 1993 | |
duke@435 | 1994 | // Printing operations |
duke@435 | 1995 | |
duke@435 | 1996 | void nmethod::print() const { |
duke@435 | 1997 | ResourceMark rm; |
duke@435 | 1998 | ttyLocker ttyl; // keep the following output all in one block |
duke@435 | 1999 | |
duke@435 | 2000 | tty->print("Compiled "); |
duke@435 | 2001 | |
duke@435 | 2002 | if (is_compiled_by_c1()) { |
duke@435 | 2003 | tty->print("(c1) "); |
duke@435 | 2004 | } else if (is_compiled_by_c2()) { |
duke@435 | 2005 | tty->print("(c2) "); |
duke@435 | 2006 | } else { |
duke@435 | 2007 | tty->print("(nm) "); |
duke@435 | 2008 | } |
duke@435 | 2009 | |
duke@435 | 2010 | print_on(tty, "nmethod"); |
duke@435 | 2011 | tty->cr(); |
duke@435 | 2012 | if (WizardMode) { |
duke@435 | 2013 | tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); |
duke@435 | 2014 | tty->print(" for method " INTPTR_FORMAT , (address)method()); |
duke@435 | 2015 | tty->print(" { "); |
duke@435 | 2016 | if (version()) tty->print("v%d ", version()); |
duke@435 | 2017 | if (level()) tty->print("l%d ", level()); |
duke@435 | 2018 | if (is_in_use()) tty->print("in_use "); |
duke@435 | 2019 | if (is_not_entrant()) tty->print("not_entrant "); |
duke@435 | 2020 | if (is_zombie()) tty->print("zombie "); |
duke@435 | 2021 | if (is_unloaded()) tty->print("unloaded "); |
duke@435 | 2022 | tty->print_cr("}:"); |
duke@435 | 2023 | } |
duke@435 | 2024 | if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2025 | (address)this, |
duke@435 | 2026 | (address)this + size(), |
duke@435 | 2027 | size()); |
duke@435 | 2028 | if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2029 | relocation_begin(), |
duke@435 | 2030 | relocation_end(), |
duke@435 | 2031 | relocation_size()); |
duke@435 | 2032 | if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2033 | code_begin(), |
duke@435 | 2034 | code_end(), |
duke@435 | 2035 | code_size()); |
duke@435 | 2036 | if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2037 | stub_begin(), |
duke@435 | 2038 | stub_end(), |
duke@435 | 2039 | stub_size()); |
duke@435 | 2040 | if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2041 | consts_begin(), |
duke@435 | 2042 | consts_end(), |
duke@435 | 2043 | consts_size()); |
duke@435 | 2044 | if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2045 | scopes_data_begin(), |
duke@435 | 2046 | scopes_data_end(), |
duke@435 | 2047 | scopes_data_size()); |
duke@435 | 2048 | if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2049 | scopes_pcs_begin(), |
duke@435 | 2050 | scopes_pcs_end(), |
duke@435 | 2051 | scopes_pcs_size()); |
duke@435 | 2052 | if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2053 | dependencies_begin(), |
duke@435 | 2054 | dependencies_end(), |
duke@435 | 2055 | dependencies_size()); |
duke@435 | 2056 | if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2057 | handler_table_begin(), |
duke@435 | 2058 | handler_table_end(), |
duke@435 | 2059 | handler_table_size()); |
duke@435 | 2060 | if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2061 | nul_chk_table_begin(), |
duke@435 | 2062 | nul_chk_table_end(), |
duke@435 | 2063 | nul_chk_table_size()); |
duke@435 | 2064 | if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
duke@435 | 2065 | oops_begin(), |
duke@435 | 2066 | oops_end(), |
duke@435 | 2067 | oops_size()); |
duke@435 | 2068 | } |
duke@435 | 2069 | |
jrose@535 | 2070 | void nmethod::print_code() { |
jrose@535 | 2071 | HandleMark hm; |
jrose@535 | 2072 | ResourceMark m; |
jrose@535 | 2073 | Disassembler::decode(this); |
jrose@535 | 2074 | } |
jrose@535 | 2075 | |
jrose@535 | 2076 | |
jrose@535 | 2077 | #ifndef PRODUCT |
duke@435 | 2078 | |
duke@435 | 2079 | void nmethod::print_scopes() { |
duke@435 | 2080 | // Find the first pc desc for all scopes in the code and print it. |
duke@435 | 2081 | ResourceMark rm; |
duke@435 | 2082 | for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
duke@435 | 2083 | if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) |
duke@435 | 2084 | continue; |
duke@435 | 2085 | |
duke@435 | 2086 | ScopeDesc* sd = scope_desc_at(p->real_pc(this)); |
duke@435 | 2087 | sd->print_on(tty, p); |
duke@435 | 2088 | } |
duke@435 | 2089 | } |
duke@435 | 2090 | |
duke@435 | 2091 | void nmethod::print_dependencies() { |
duke@435 | 2092 | ResourceMark rm; |
duke@435 | 2093 | ttyLocker ttyl; // keep the following output all in one block |
duke@435 | 2094 | tty->print_cr("Dependencies:"); |
duke@435 | 2095 | for (Dependencies::DepStream deps(this); deps.next(); ) { |
duke@435 | 2096 | deps.print_dependency(); |
duke@435 | 2097 | klassOop ctxk = deps.context_type(); |
duke@435 | 2098 | if (ctxk != NULL) { |
duke@435 | 2099 | Klass* k = Klass::cast(ctxk); |
duke@435 | 2100 | if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { |
jrose@465 | 2101 | tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
duke@435 | 2102 | } |
duke@435 | 2103 | } |
duke@435 | 2104 | deps.log_dependency(); // put it into the xml log also |
duke@435 | 2105 | } |
duke@435 | 2106 | } |
duke@435 | 2107 | |
duke@435 | 2108 | |
duke@435 | 2109 | void nmethod::print_relocations() { |
duke@435 | 2110 | ResourceMark m; // in case methods get printed via the debugger |
duke@435 | 2111 | tty->print_cr("relocations:"); |
duke@435 | 2112 | RelocIterator iter(this); |
duke@435 | 2113 | iter.print(); |
duke@435 | 2114 | if (UseRelocIndex) { |
duke@435 | 2115 | jint* index_end = (jint*)relocation_end() - 1; |
duke@435 | 2116 | jint index_size = *index_end; |
duke@435 | 2117 | jint* index_start = (jint*)( (address)index_end - index_size ); |
duke@435 | 2118 | tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); |
duke@435 | 2119 | if (index_size > 0) { |
duke@435 | 2120 | jint* ip; |
duke@435 | 2121 | for (ip = index_start; ip+2 <= index_end; ip += 2) |
duke@435 | 2122 | tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, |
duke@435 | 2123 | ip[0], |
duke@435 | 2124 | ip[1], |
duke@435 | 2125 | header_end()+ip[0], |
duke@435 | 2126 | relocation_begin()-1+ip[1]); |
duke@435 | 2127 | for (; ip < index_end; ip++) |
duke@435 | 2128 | tty->print_cr(" (%d ?)", ip[0]); |
duke@435 | 2129 | tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); |
duke@435 | 2130 | tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
duke@435 | 2131 | } |
duke@435 | 2132 | } |
duke@435 | 2133 | } |
duke@435 | 2134 | |
duke@435 | 2135 | |
duke@435 | 2136 | void nmethod::print_pcs() { |
duke@435 | 2137 | ResourceMark m; // in case methods get printed via debugger |
duke@435 | 2138 | tty->print_cr("pc-bytecode offsets:"); |
duke@435 | 2139 | for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { |
duke@435 | 2140 | p->print(this); |
duke@435 | 2141 | } |
duke@435 | 2142 | } |
duke@435 | 2143 | |
jrose@535 | 2144 | #endif // PRODUCT |
duke@435 | 2145 | |
duke@435 | 2146 | const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { |
duke@435 | 2147 | RelocIterator iter(this, begin, end); |
duke@435 | 2148 | bool have_one = false; |
duke@435 | 2149 | while (iter.next()) { |
duke@435 | 2150 | have_one = true; |
duke@435 | 2151 | switch (iter.type()) { |
duke@435 | 2152 | case relocInfo::none: return "no_reloc"; |
duke@435 | 2153 | case relocInfo::oop_type: { |
duke@435 | 2154 | stringStream st; |
duke@435 | 2155 | oop_Relocation* r = iter.oop_reloc(); |
duke@435 | 2156 | oop obj = r->oop_value(); |
duke@435 | 2157 | st.print("oop("); |
duke@435 | 2158 | if (obj == NULL) st.print("NULL"); |
duke@435 | 2159 | else obj->print_value_on(&st); |
duke@435 | 2160 | st.print(")"); |
duke@435 | 2161 | return st.as_string(); |
duke@435 | 2162 | } |
duke@435 | 2163 | case relocInfo::virtual_call_type: return "virtual_call"; |
duke@435 | 2164 | case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; |
duke@435 | 2165 | case relocInfo::static_call_type: return "static_call"; |
duke@435 | 2166 | case relocInfo::static_stub_type: return "static_stub"; |
duke@435 | 2167 | case relocInfo::runtime_call_type: return "runtime_call"; |
duke@435 | 2168 | case relocInfo::external_word_type: return "external_word"; |
duke@435 | 2169 | case relocInfo::internal_word_type: return "internal_word"; |
duke@435 | 2170 | case relocInfo::section_word_type: return "section_word"; |
duke@435 | 2171 | case relocInfo::poll_type: return "poll"; |
duke@435 | 2172 | case relocInfo::poll_return_type: return "poll_return"; |
duke@435 | 2173 | case relocInfo::type_mask: return "type_bit_mask"; |
duke@435 | 2174 | } |
duke@435 | 2175 | } |
duke@435 | 2176 | return have_one ? "other" : NULL; |
duke@435 | 2177 | } |
duke@435 | 2178 | |
duke@435 | 2179 | // Return a the last scope in (begin..end] |
duke@435 | 2180 | ScopeDesc* nmethod::scope_desc_in(address begin, address end) { |
duke@435 | 2181 | PcDesc* p = pc_desc_near(begin+1); |
duke@435 | 2182 | if (p != NULL && p->real_pc(this) <= end) { |
duke@435 | 2183 | return new ScopeDesc(this, p->scope_decode_offset(), |
duke@435 | 2184 | p->obj_decode_offset()); |
duke@435 | 2185 | } |
duke@435 | 2186 | return NULL; |
duke@435 | 2187 | } |
duke@435 | 2188 | |
duke@435 | 2189 | void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
duke@435 | 2190 | // First, find an oopmap in (begin, end]. |
duke@435 | 2191 | // We use the odd half-closed interval so that oop maps and scope descs |
duke@435 | 2192 | // which are tied to the byte after a call are printed with the call itself. |
duke@435 | 2193 | address base = instructions_begin(); |
duke@435 | 2194 | OopMapSet* oms = oop_maps(); |
duke@435 | 2195 | if (oms != NULL) { |
duke@435 | 2196 | for (int i = 0, imax = oms->size(); i < imax; i++) { |
duke@435 | 2197 | OopMap* om = oms->at(i); |
duke@435 | 2198 | address pc = base + om->offset(); |
duke@435 | 2199 | if (pc > begin) { |
duke@435 | 2200 | if (pc <= end) { |
jrose@535 | 2201 | st->move_to(column); |
jrose@535 | 2202 | st->print("; "); |
jrose@535 | 2203 | om->print_on(st); |
duke@435 | 2204 | } |
duke@435 | 2205 | break; |
duke@435 | 2206 | } |
duke@435 | 2207 | } |
duke@435 | 2208 | } |
jrose@535 | 2209 | |
jrose@535 | 2210 | // Print any debug info present at this pc. |
duke@435 | 2211 | ScopeDesc* sd = scope_desc_in(begin, end); |
duke@435 | 2212 | if (sd != NULL) { |
jrose@535 | 2213 | st->move_to(column); |
duke@435 | 2214 | if (sd->bci() == SynchronizationEntryBCI) { |
duke@435 | 2215 | st->print(";*synchronization entry"); |
duke@435 | 2216 | } else { |
duke@435 | 2217 | if (sd->method().is_null()) { |
jrose@535 | 2218 | st->print("method is NULL"); |
duke@435 | 2219 | } else if (sd->method()->is_native()) { |
jrose@535 | 2220 | st->print("method is native"); |
duke@435 | 2221 | } else { |
duke@435 | 2222 | address bcp = sd->method()->bcp_from(sd->bci()); |
duke@435 | 2223 | Bytecodes::Code bc = Bytecodes::java_code_at(bcp); |
duke@435 | 2224 | st->print(";*%s", Bytecodes::name(bc)); |
duke@435 | 2225 | switch (bc) { |
duke@435 | 2226 | case Bytecodes::_invokevirtual: |
duke@435 | 2227 | case Bytecodes::_invokespecial: |
duke@435 | 2228 | case Bytecodes::_invokestatic: |
duke@435 | 2229 | case Bytecodes::_invokeinterface: |
duke@435 | 2230 | { |
duke@435 | 2231 | Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); |
duke@435 | 2232 | st->print(" "); |
duke@435 | 2233 | if (invoke->name() != NULL) |
duke@435 | 2234 | invoke->name()->print_symbol_on(st); |
duke@435 | 2235 | else |
duke@435 | 2236 | st->print("<UNKNOWN>"); |
duke@435 | 2237 | break; |
duke@435 | 2238 | } |
duke@435 | 2239 | case Bytecodes::_getfield: |
duke@435 | 2240 | case Bytecodes::_putfield: |
duke@435 | 2241 | case Bytecodes::_getstatic: |
duke@435 | 2242 | case Bytecodes::_putstatic: |
duke@435 | 2243 | { |
duke@435 | 2244 | methodHandle sdm = sd->method(); |
duke@435 | 2245 | Bytecode_field* field = Bytecode_field_at(sdm(), sdm->bcp_from(sd->bci())); |
duke@435 | 2246 | constantPoolOop sdmc = sdm->constants(); |
duke@435 | 2247 | symbolOop name = sdmc->name_ref_at(field->index()); |
duke@435 | 2248 | st->print(" "); |
duke@435 | 2249 | if (name != NULL) |
duke@435 | 2250 | name->print_symbol_on(st); |
duke@435 | 2251 | else |
duke@435 | 2252 | st->print("<UNKNOWN>"); |
duke@435 | 2253 | } |
duke@435 | 2254 | } |
duke@435 | 2255 | } |
duke@435 | 2256 | } |
jrose@535 | 2257 | |
duke@435 | 2258 | // Print all scopes |
duke@435 | 2259 | for (;sd != NULL; sd = sd->sender()) { |
jrose@535 | 2260 | st->move_to(column); |
duke@435 | 2261 | st->print("; -"); |
duke@435 | 2262 | if (sd->method().is_null()) { |
jrose@535 | 2263 | st->print("method is NULL"); |
duke@435 | 2264 | } else { |
duke@435 | 2265 | sd->method()->print_short_name(st); |
duke@435 | 2266 | } |
duke@435 | 2267 | int lineno = sd->method()->line_number_from_bci(sd->bci()); |
duke@435 | 2268 | if (lineno != -1) { |
duke@435 | 2269 | st->print("@%d (line %d)", sd->bci(), lineno); |
duke@435 | 2270 | } else { |
duke@435 | 2271 | st->print("@%d", sd->bci()); |
duke@435 | 2272 | } |
duke@435 | 2273 | st->cr(); |
duke@435 | 2274 | } |
duke@435 | 2275 | } |
duke@435 | 2276 | |
duke@435 | 2277 | // Print relocation information |
duke@435 | 2278 | const char* str = reloc_string_for(begin, end); |
duke@435 | 2279 | if (str != NULL) { |
duke@435 | 2280 | if (sd != NULL) st->cr(); |
jrose@535 | 2281 | st->move_to(column); |
duke@435 | 2282 | st->print("; {%s}", str); |
duke@435 | 2283 | } |
duke@435 | 2284 | int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); |
duke@435 | 2285 | if (cont_offset != 0) { |
jrose@535 | 2286 | st->move_to(column); |
duke@435 | 2287 | st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); |
duke@435 | 2288 | } |
duke@435 | 2289 | |
duke@435 | 2290 | } |
duke@435 | 2291 | |
jrose@535 | 2292 | #ifndef PRODUCT |
jrose@535 | 2293 | |
duke@435 | 2294 | void nmethod::print_value_on(outputStream* st) const { |
duke@435 | 2295 | print_on(st, "nmethod"); |
duke@435 | 2296 | } |
duke@435 | 2297 | |
duke@435 | 2298 | void nmethod::print_calls(outputStream* st) { |
duke@435 | 2299 | RelocIterator iter(this); |
duke@435 | 2300 | while (iter.next()) { |
duke@435 | 2301 | switch (iter.type()) { |
duke@435 | 2302 | case relocInfo::virtual_call_type: |
duke@435 | 2303 | case relocInfo::opt_virtual_call_type: { |
duke@435 | 2304 | VerifyMutexLocker mc(CompiledIC_lock); |
duke@435 | 2305 | CompiledIC_at(iter.reloc())->print(); |
duke@435 | 2306 | break; |
duke@435 | 2307 | } |
duke@435 | 2308 | case relocInfo::static_call_type: |
duke@435 | 2309 | st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); |
duke@435 | 2310 | compiledStaticCall_at(iter.reloc())->print(); |
duke@435 | 2311 | break; |
duke@435 | 2312 | } |
duke@435 | 2313 | } |
duke@435 | 2314 | } |
duke@435 | 2315 | |
duke@435 | 2316 | void nmethod::print_handler_table() { |
duke@435 | 2317 | ExceptionHandlerTable(this).print(); |
duke@435 | 2318 | } |
duke@435 | 2319 | |
duke@435 | 2320 | void nmethod::print_nul_chk_table() { |
duke@435 | 2321 | ImplicitExceptionTable(this).print(instructions_begin()); |
duke@435 | 2322 | } |
duke@435 | 2323 | |
duke@435 | 2324 | void nmethod::print_statistics() { |
duke@435 | 2325 | ttyLocker ttyl; |
duke@435 | 2326 | if (xtty != NULL) xtty->head("statistics type='nmethod'"); |
duke@435 | 2327 | nmethod_stats.print_native_nmethod_stats(); |
duke@435 | 2328 | nmethod_stats.print_nmethod_stats(); |
duke@435 | 2329 | DebugInformationRecorder::print_statistics(); |
duke@435 | 2330 | nmethod_stats.print_pc_stats(); |
duke@435 | 2331 | Dependencies::print_statistics(); |
duke@435 | 2332 | if (xtty != NULL) xtty->tail("statistics"); |
duke@435 | 2333 | } |
duke@435 | 2334 | |
duke@435 | 2335 | #endif // PRODUCT |