Mercurial > hg > graal-compiler
annotate src/share/vm/oops/methodData.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | src/share/vm/oops/methodDataOop.cpp@a97fd181b813 |
| children | e522a00b91aa 16fb9f942703 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "interpreter/bytecode.hpp" | |
| 28 #include "interpreter/bytecodeStream.hpp" | |
| 29 #include "interpreter/linkResolver.hpp" | |
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30 #include "oops/methodData.hpp" |
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31 #include "prims/jvmtiRedefineClasses.hpp" |
| 1972 | 32 #include "runtime/compilationPolicy.hpp" |
| 33 #include "runtime/deoptimization.hpp" | |
| 34 #include "runtime/handles.inline.hpp" | |
| 0 | 35 |
| 36 // ================================================================== | |
| 37 // DataLayout | |
| 38 // | |
| 39 // Overlay for generic profiling data. | |
| 40 | |
| 41 // Some types of data layouts need a length field. | |
| 42 bool DataLayout::needs_array_len(u1 tag) { | |
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43 return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag); |
| 0 | 44 } |
| 45 | |
| 46 // Perform generic initialization of the data. More specific | |
| 47 // initialization occurs in overrides of ProfileData::post_initialize. | |
| 48 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) { | |
| 49 _header._bits = (intptr_t)0; | |
| 50 _header._struct._tag = tag; | |
| 51 _header._struct._bci = bci; | |
| 52 for (int i = 0; i < cell_count; i++) { | |
| 53 set_cell_at(i, (intptr_t)0); | |
| 54 } | |
| 55 if (needs_array_len(tag)) { | |
| 56 set_cell_at(ArrayData::array_len_off_set, cell_count - 1); // -1 for header. | |
| 57 } | |
| 58 } | |
| 59 | |
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60 void DataLayout::clean_weak_klass_links(BoolObjectClosure* cl) { |
| 941 | 61 ResourceMark m; |
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62 data_in()->clean_weak_klass_links(cl); |
| 941 | 63 } |
| 64 | |
| 65 | |
| 0 | 66 // ================================================================== |
| 67 // ProfileData | |
| 68 // | |
| 69 // A ProfileData object is created to refer to a section of profiling | |
| 70 // data in a structured way. | |
| 71 | |
| 72 // Constructor for invalid ProfileData. | |
| 73 ProfileData::ProfileData() { | |
| 74 _data = NULL; | |
| 75 } | |
| 76 | |
| 77 #ifndef PRODUCT | |
| 78 void ProfileData::print_shared(outputStream* st, const char* name) { | |
| 79 st->print("bci: %d", bci()); | |
| 80 st->fill_to(tab_width_one); | |
| 81 st->print("%s", name); | |
| 82 tab(st); | |
| 83 int trap = trap_state(); | |
| 84 if (trap != 0) { | |
| 85 char buf[100]; | |
| 86 st->print("trap(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap)); | |
| 87 } | |
| 88 int flags = data()->flags(); | |
| 89 if (flags != 0) | |
| 90 st->print("flags(%d) ", flags); | |
| 91 } | |
| 92 | |
| 93 void ProfileData::tab(outputStream* st) { | |
| 94 st->fill_to(tab_width_two); | |
| 95 } | |
| 96 #endif // !PRODUCT | |
| 97 | |
| 98 // ================================================================== | |
| 99 // BitData | |
| 100 // | |
| 101 // A BitData corresponds to a one-bit flag. This is used to indicate | |
| 102 // whether a checkcast bytecode has seen a null value. | |
| 103 | |
| 104 | |
| 105 #ifndef PRODUCT | |
| 106 void BitData::print_data_on(outputStream* st) { | |
| 107 print_shared(st, "BitData"); | |
| 108 } | |
| 109 #endif // !PRODUCT | |
| 110 | |
| 111 // ================================================================== | |
| 112 // CounterData | |
| 113 // | |
| 114 // A CounterData corresponds to a simple counter. | |
| 115 | |
| 116 #ifndef PRODUCT | |
| 117 void CounterData::print_data_on(outputStream* st) { | |
| 118 print_shared(st, "CounterData"); | |
| 119 st->print_cr("count(%u)", count()); | |
| 120 } | |
| 121 #endif // !PRODUCT | |
| 122 | |
| 123 // ================================================================== | |
| 124 // JumpData | |
| 125 // | |
| 126 // A JumpData is used to access profiling information for a direct | |
| 127 // branch. It is a counter, used for counting the number of branches, | |
| 128 // plus a data displacement, used for realigning the data pointer to | |
| 129 // the corresponding target bci. | |
| 130 | |
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131 void JumpData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 132 assert(stream->bci() == bci(), "wrong pos"); |
| 133 int target; | |
| 134 Bytecodes::Code c = stream->code(); | |
| 135 if (c == Bytecodes::_goto_w || c == Bytecodes::_jsr_w) { | |
| 136 target = stream->dest_w(); | |
| 137 } else { | |
| 138 target = stream->dest(); | |
| 139 } | |
| 140 int my_di = mdo->dp_to_di(dp()); | |
| 141 int target_di = mdo->bci_to_di(target); | |
| 142 int offset = target_di - my_di; | |
| 143 set_displacement(offset); | |
| 144 } | |
| 145 | |
| 146 #ifndef PRODUCT | |
| 147 void JumpData::print_data_on(outputStream* st) { | |
| 148 print_shared(st, "JumpData"); | |
| 149 st->print_cr("taken(%u) displacement(%d)", taken(), displacement()); | |
| 150 } | |
| 151 #endif // !PRODUCT | |
| 152 | |
| 153 // ================================================================== | |
| 154 // ReceiverTypeData | |
| 155 // | |
| 156 // A ReceiverTypeData is used to access profiling information about a | |
| 157 // dynamic type check. It consists of a counter which counts the total times | |
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158 // that the check is reached, and a series of (Klass*, count) pairs |
| 0 | 159 // which are used to store a type profile for the receiver of the check. |
| 160 | |
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161 void ReceiverTypeData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { |
| 941 | 162 for (uint row = 0; row < row_limit(); row++) { |
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163 Klass* p = receiver(row); |
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164 if (p != NULL && !p->is_loader_alive(is_alive_cl)) { |
| 941 | 165 clear_row(row); |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 | |
| 0 | 170 #ifndef PRODUCT |
| 171 void ReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
| 172 uint row; | |
| 173 int entries = 0; | |
| 174 for (row = 0; row < row_limit(); row++) { | |
| 175 if (receiver(row) != NULL) entries++; | |
| 176 } | |
| 177 st->print_cr("count(%u) entries(%u)", count(), entries); | |
| 1783 | 178 int total = count(); |
| 179 for (row = 0; row < row_limit(); row++) { | |
| 180 if (receiver(row) != NULL) { | |
| 181 total += receiver_count(row); | |
| 182 } | |
| 183 } | |
| 0 | 184 for (row = 0; row < row_limit(); row++) { |
| 185 if (receiver(row) != NULL) { | |
| 186 tab(st); | |
| 187 receiver(row)->print_value_on(st); | |
| 1783 | 188 st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total); |
| 0 | 189 } |
| 190 } | |
| 191 } | |
| 192 void ReceiverTypeData::print_data_on(outputStream* st) { | |
| 193 print_shared(st, "ReceiverTypeData"); | |
| 194 print_receiver_data_on(st); | |
| 195 } | |
| 196 void VirtualCallData::print_data_on(outputStream* st) { | |
| 197 print_shared(st, "VirtualCallData"); | |
| 198 print_receiver_data_on(st); | |
| 199 } | |
| 200 #endif // !PRODUCT | |
| 201 | |
| 202 // ================================================================== | |
| 203 // RetData | |
| 204 // | |
| 205 // A RetData is used to access profiling information for a ret bytecode. | |
| 206 // It is composed of a count of the number of times that the ret has | |
| 207 // been executed, followed by a series of triples of the form | |
| 208 // (bci, count, di) which count the number of times that some bci was the | |
| 209 // target of the ret and cache a corresponding displacement. | |
| 210 | |
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211 void RetData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 212 for (uint row = 0; row < row_limit(); row++) { |
| 213 set_bci_displacement(row, -1); | |
| 214 set_bci(row, no_bci); | |
| 215 } | |
| 216 // release so other threads see a consistent state. bci is used as | |
| 217 // a valid flag for bci_displacement. | |
| 218 OrderAccess::release(); | |
| 219 } | |
| 220 | |
| 221 // This routine needs to atomically update the RetData structure, so the | |
| 222 // caller needs to hold the RetData_lock before it gets here. Since taking | |
| 223 // the lock can block (and allow GC) and since RetData is a ProfileData is a | |
| 224 // wrapper around a derived oop, taking the lock in _this_ method will | |
| 225 // basically cause the 'this' pointer's _data field to contain junk after the | |
| 226 // lock. We require the caller to take the lock before making the ProfileData | |
| 227 // structure. Currently the only caller is InterpreterRuntime::update_mdp_for_ret | |
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228 address RetData::fixup_ret(int return_bci, MethodData* h_mdo) { |
| 0 | 229 // First find the mdp which corresponds to the return bci. |
| 230 address mdp = h_mdo->bci_to_dp(return_bci); | |
| 231 | |
| 232 // Now check to see if any of the cache slots are open. | |
| 233 for (uint row = 0; row < row_limit(); row++) { | |
| 234 if (bci(row) == no_bci) { | |
| 235 set_bci_displacement(row, mdp - dp()); | |
| 236 set_bci_count(row, DataLayout::counter_increment); | |
| 237 // Barrier to ensure displacement is written before the bci; allows | |
| 238 // the interpreter to read displacement without fear of race condition. | |
| 239 release_set_bci(row, return_bci); | |
| 240 break; | |
| 241 } | |
| 242 } | |
| 243 return mdp; | |
| 244 } | |
| 245 | |
| 246 | |
| 247 #ifndef PRODUCT | |
| 248 void RetData::print_data_on(outputStream* st) { | |
| 249 print_shared(st, "RetData"); | |
| 250 uint row; | |
| 251 int entries = 0; | |
| 252 for (row = 0; row < row_limit(); row++) { | |
| 253 if (bci(row) != no_bci) entries++; | |
| 254 } | |
| 255 st->print_cr("count(%u) entries(%u)", count(), entries); | |
| 256 for (row = 0; row < row_limit(); row++) { | |
| 257 if (bci(row) != no_bci) { | |
| 258 tab(st); | |
| 259 st->print_cr("bci(%d: count(%u) displacement(%d))", | |
| 260 bci(row), bci_count(row), bci_displacement(row)); | |
| 261 } | |
| 262 } | |
| 263 } | |
| 264 #endif // !PRODUCT | |
| 265 | |
| 266 // ================================================================== | |
| 267 // BranchData | |
| 268 // | |
| 269 // A BranchData is used to access profiling data for a two-way branch. | |
| 270 // It consists of taken and not_taken counts as well as a data displacement | |
| 271 // for the taken case. | |
| 272 | |
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273 void BranchData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 274 assert(stream->bci() == bci(), "wrong pos"); |
| 275 int target = stream->dest(); | |
| 276 int my_di = mdo->dp_to_di(dp()); | |
| 277 int target_di = mdo->bci_to_di(target); | |
| 278 int offset = target_di - my_di; | |
| 279 set_displacement(offset); | |
| 280 } | |
| 281 | |
| 282 #ifndef PRODUCT | |
| 283 void BranchData::print_data_on(outputStream* st) { | |
| 284 print_shared(st, "BranchData"); | |
| 285 st->print_cr("taken(%u) displacement(%d)", | |
| 286 taken(), displacement()); | |
| 287 tab(st); | |
| 288 st->print_cr("not taken(%u)", not_taken()); | |
| 289 } | |
| 290 #endif | |
| 291 | |
| 292 // ================================================================== | |
| 293 // MultiBranchData | |
| 294 // | |
| 295 // A MultiBranchData is used to access profiling information for | |
| 296 // a multi-way branch (*switch bytecodes). It consists of a series | |
| 297 // of (count, displacement) pairs, which count the number of times each | |
| 298 // case was taken and specify the data displacment for each branch target. | |
| 299 | |
| 300 int MultiBranchData::compute_cell_count(BytecodeStream* stream) { | |
| 301 int cell_count = 0; | |
| 302 if (stream->code() == Bytecodes::_tableswitch) { | |
| 2142 | 303 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
| 304 cell_count = 1 + per_case_cell_count * (1 + sw.length()); // 1 for default | |
| 0 | 305 } else { |
| 2142 | 306 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
| 307 cell_count = 1 + per_case_cell_count * (sw.number_of_pairs() + 1); // 1 for default | |
| 0 | 308 } |
| 309 return cell_count; | |
| 310 } | |
| 311 | |
| 312 void MultiBranchData::post_initialize(BytecodeStream* stream, | |
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313 MethodData* mdo) { |
| 0 | 314 assert(stream->bci() == bci(), "wrong pos"); |
| 315 int target; | |
| 316 int my_di; | |
| 317 int target_di; | |
| 318 int offset; | |
| 319 if (stream->code() == Bytecodes::_tableswitch) { | |
| 2142 | 320 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
| 321 int len = sw.length(); | |
| 0 | 322 assert(array_len() == per_case_cell_count * (len + 1), "wrong len"); |
| 323 for (int count = 0; count < len; count++) { | |
| 2142 | 324 target = sw.dest_offset_at(count) + bci(); |
| 0 | 325 my_di = mdo->dp_to_di(dp()); |
| 326 target_di = mdo->bci_to_di(target); | |
| 327 offset = target_di - my_di; | |
| 328 set_displacement_at(count, offset); | |
| 329 } | |
| 2142 | 330 target = sw.default_offset() + bci(); |
| 0 | 331 my_di = mdo->dp_to_di(dp()); |
| 332 target_di = mdo->bci_to_di(target); | |
| 333 offset = target_di - my_di; | |
| 334 set_default_displacement(offset); | |
| 335 | |
| 336 } else { | |
| 2142 | 337 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
| 338 int npairs = sw.number_of_pairs(); | |
| 0 | 339 assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len"); |
| 340 for (int count = 0; count < npairs; count++) { | |
| 2142 | 341 LookupswitchPair pair = sw.pair_at(count); |
| 342 target = pair.offset() + bci(); | |
| 0 | 343 my_di = mdo->dp_to_di(dp()); |
| 344 target_di = mdo->bci_to_di(target); | |
| 345 offset = target_di - my_di; | |
| 346 set_displacement_at(count, offset); | |
| 347 } | |
| 2142 | 348 target = sw.default_offset() + bci(); |
| 0 | 349 my_di = mdo->dp_to_di(dp()); |
| 350 target_di = mdo->bci_to_di(target); | |
| 351 offset = target_di - my_di; | |
| 352 set_default_displacement(offset); | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 #ifndef PRODUCT | |
| 357 void MultiBranchData::print_data_on(outputStream* st) { | |
| 358 print_shared(st, "MultiBranchData"); | |
| 359 st->print_cr("default_count(%u) displacement(%d)", | |
| 360 default_count(), default_displacement()); | |
| 361 int cases = number_of_cases(); | |
| 362 for (int i = 0; i < cases; i++) { | |
| 363 tab(st); | |
| 364 st->print_cr("count(%u) displacement(%d)", | |
| 365 count_at(i), displacement_at(i)); | |
| 366 } | |
| 367 } | |
| 368 #endif | |
| 369 | |
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370 #ifndef PRODUCT |
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371 void ArgInfoData::print_data_on(outputStream* st) { |
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372 print_shared(st, "ArgInfoData"); |
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373 int nargs = number_of_args(); |
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374 for (int i = 0; i < nargs; i++) { |
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375 st->print(" 0x%x", arg_modified(i)); |
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376 } |
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377 st->cr(); |
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378 } |
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379 |
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380 #endif |
| 0 | 381 // ================================================================== |
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382 // MethodData* |
| 0 | 383 // |
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384 // A MethodData* holds information which has been collected about |
| 0 | 385 // a method. |
| 386 | |
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387 MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS) { |
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388 int size = MethodData::compute_allocation_size_in_words(method); |
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389 |
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390 return new (loader_data, size, false, THREAD) MethodData(method(), size, CHECK_NULL); |
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391 } |
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392 |
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393 int MethodData::bytecode_cell_count(Bytecodes::Code code) { |
| 0 | 394 switch (code) { |
| 395 case Bytecodes::_checkcast: | |
| 396 case Bytecodes::_instanceof: | |
| 397 case Bytecodes::_aastore: | |
| 398 if (TypeProfileCasts) { | |
| 399 return ReceiverTypeData::static_cell_count(); | |
| 400 } else { | |
| 401 return BitData::static_cell_count(); | |
| 402 } | |
| 403 case Bytecodes::_invokespecial: | |
| 404 case Bytecodes::_invokestatic: | |
| 405 return CounterData::static_cell_count(); | |
| 406 case Bytecodes::_goto: | |
| 407 case Bytecodes::_goto_w: | |
| 408 case Bytecodes::_jsr: | |
| 409 case Bytecodes::_jsr_w: | |
| 410 return JumpData::static_cell_count(); | |
| 411 case Bytecodes::_invokevirtual: | |
| 412 case Bytecodes::_invokeinterface: | |
| 413 return VirtualCallData::static_cell_count(); | |
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414 case Bytecodes::_invokedynamic: |
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415 return CounterData::static_cell_count(); |
| 0 | 416 case Bytecodes::_ret: |
| 417 return RetData::static_cell_count(); | |
| 418 case Bytecodes::_ifeq: | |
| 419 case Bytecodes::_ifne: | |
| 420 case Bytecodes::_iflt: | |
| 421 case Bytecodes::_ifge: | |
| 422 case Bytecodes::_ifgt: | |
| 423 case Bytecodes::_ifle: | |
| 424 case Bytecodes::_if_icmpeq: | |
| 425 case Bytecodes::_if_icmpne: | |
| 426 case Bytecodes::_if_icmplt: | |
| 427 case Bytecodes::_if_icmpge: | |
| 428 case Bytecodes::_if_icmpgt: | |
| 429 case Bytecodes::_if_icmple: | |
| 430 case Bytecodes::_if_acmpeq: | |
| 431 case Bytecodes::_if_acmpne: | |
| 432 case Bytecodes::_ifnull: | |
| 433 case Bytecodes::_ifnonnull: | |
| 434 return BranchData::static_cell_count(); | |
| 435 case Bytecodes::_lookupswitch: | |
| 436 case Bytecodes::_tableswitch: | |
| 437 return variable_cell_count; | |
| 438 } | |
| 439 return no_profile_data; | |
| 440 } | |
| 441 | |
| 442 // Compute the size of the profiling information corresponding to | |
| 443 // the current bytecode. | |
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444 int MethodData::compute_data_size(BytecodeStream* stream) { |
| 0 | 445 int cell_count = bytecode_cell_count(stream->code()); |
| 446 if (cell_count == no_profile_data) { | |
| 447 return 0; | |
| 448 } | |
| 449 if (cell_count == variable_cell_count) { | |
| 450 cell_count = MultiBranchData::compute_cell_count(stream); | |
| 451 } | |
| 452 // Note: cell_count might be zero, meaning that there is just | |
| 453 // a DataLayout header, with no extra cells. | |
| 454 assert(cell_count >= 0, "sanity"); | |
| 455 return DataLayout::compute_size_in_bytes(cell_count); | |
| 456 } | |
| 457 | |
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458 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
| 0 | 459 if (ProfileTraps) { |
| 460 // Assume that up to 3% of BCIs with no MDP will need to allocate one. | |
| 461 int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1; | |
| 462 // If the method is large, let the extra BCIs grow numerous (to ~1%). | |
| 463 int one_percent_of_data | |
| 464 = (uint)data_size / (DataLayout::header_size_in_bytes()*128); | |
| 465 if (extra_data_count < one_percent_of_data) | |
| 466 extra_data_count = one_percent_of_data; | |
| 467 if (extra_data_count > empty_bc_count) | |
| 468 extra_data_count = empty_bc_count; // no need for more | |
| 469 return extra_data_count; | |
| 470 } else { | |
| 471 return 0; | |
| 472 } | |
| 473 } | |
| 474 | |
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475 // Compute the size of the MethodData* necessary to store |
| 0 | 476 // profiling information about a given method. Size is in bytes. |
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477 int MethodData::compute_allocation_size_in_bytes(methodHandle method) { |
| 0 | 478 int data_size = 0; |
| 479 BytecodeStream stream(method); | |
| 480 Bytecodes::Code c; | |
| 481 int empty_bc_count = 0; // number of bytecodes lacking data | |
| 482 while ((c = stream.next()) >= 0) { | |
| 483 int size_in_bytes = compute_data_size(&stream); | |
| 484 data_size += size_in_bytes; | |
| 485 if (size_in_bytes == 0) empty_bc_count += 1; | |
| 486 } | |
| 487 int object_size = in_bytes(data_offset()) + data_size; | |
| 488 | |
| 489 // Add some extra DataLayout cells (at least one) to track stray traps. | |
| 490 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
| 491 object_size += extra_data_count * DataLayout::compute_size_in_bytes(0); | |
| 492 | |
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493 // Add a cell to record information about modified arguments. |
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494 int arg_size = method->size_of_parameters(); |
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495 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
| 0 | 496 return object_size; |
| 497 } | |
| 498 | |
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499 // Compute the size of the MethodData* necessary to store |
| 0 | 500 // profiling information about a given method. Size is in words |
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501 int MethodData::compute_allocation_size_in_words(methodHandle method) { |
| 0 | 502 int byte_size = compute_allocation_size_in_bytes(method); |
| 503 int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord; | |
| 504 return align_object_size(word_size); | |
| 505 } | |
| 506 | |
| 507 // Initialize an individual data segment. Returns the size of | |
| 508 // the segment in bytes. | |
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509 int MethodData::initialize_data(BytecodeStream* stream, |
| 0 | 510 int data_index) { |
| 511 int cell_count = -1; | |
| 512 int tag = DataLayout::no_tag; | |
| 513 DataLayout* data_layout = data_layout_at(data_index); | |
| 514 Bytecodes::Code c = stream->code(); | |
| 515 switch (c) { | |
| 516 case Bytecodes::_checkcast: | |
| 517 case Bytecodes::_instanceof: | |
| 518 case Bytecodes::_aastore: | |
| 519 if (TypeProfileCasts) { | |
| 520 cell_count = ReceiverTypeData::static_cell_count(); | |
| 521 tag = DataLayout::receiver_type_data_tag; | |
| 522 } else { | |
| 523 cell_count = BitData::static_cell_count(); | |
| 524 tag = DataLayout::bit_data_tag; | |
| 525 } | |
| 526 break; | |
| 527 case Bytecodes::_invokespecial: | |
| 528 case Bytecodes::_invokestatic: | |
| 529 cell_count = CounterData::static_cell_count(); | |
| 530 tag = DataLayout::counter_data_tag; | |
| 531 break; | |
| 532 case Bytecodes::_goto: | |
| 533 case Bytecodes::_goto_w: | |
| 534 case Bytecodes::_jsr: | |
| 535 case Bytecodes::_jsr_w: | |
| 536 cell_count = JumpData::static_cell_count(); | |
| 537 tag = DataLayout::jump_data_tag; | |
| 538 break; | |
| 539 case Bytecodes::_invokevirtual: | |
| 540 case Bytecodes::_invokeinterface: | |
| 541 cell_count = VirtualCallData::static_cell_count(); | |
| 542 tag = DataLayout::virtual_call_data_tag; | |
| 543 break; | |
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544 case Bytecodes::_invokedynamic: |
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545 // %%% should make a type profile for any invokedynamic that takes a ref argument |
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546 cell_count = CounterData::static_cell_count(); |
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547 tag = DataLayout::counter_data_tag; |
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548 break; |
| 0 | 549 case Bytecodes::_ret: |
| 550 cell_count = RetData::static_cell_count(); | |
| 551 tag = DataLayout::ret_data_tag; | |
| 552 break; | |
| 553 case Bytecodes::_ifeq: | |
| 554 case Bytecodes::_ifne: | |
| 555 case Bytecodes::_iflt: | |
| 556 case Bytecodes::_ifge: | |
| 557 case Bytecodes::_ifgt: | |
| 558 case Bytecodes::_ifle: | |
| 559 case Bytecodes::_if_icmpeq: | |
| 560 case Bytecodes::_if_icmpne: | |
| 561 case Bytecodes::_if_icmplt: | |
| 562 case Bytecodes::_if_icmpge: | |
| 563 case Bytecodes::_if_icmpgt: | |
| 564 case Bytecodes::_if_icmple: | |
| 565 case Bytecodes::_if_acmpeq: | |
| 566 case Bytecodes::_if_acmpne: | |
| 567 case Bytecodes::_ifnull: | |
| 568 case Bytecodes::_ifnonnull: | |
| 569 cell_count = BranchData::static_cell_count(); | |
| 570 tag = DataLayout::branch_data_tag; | |
| 571 break; | |
| 572 case Bytecodes::_lookupswitch: | |
| 573 case Bytecodes::_tableswitch: | |
| 574 cell_count = MultiBranchData::compute_cell_count(stream); | |
| 575 tag = DataLayout::multi_branch_data_tag; | |
| 576 break; | |
| 577 } | |
| 578 assert(tag == DataLayout::multi_branch_data_tag || | |
| 579 cell_count == bytecode_cell_count(c), "cell counts must agree"); | |
| 580 if (cell_count >= 0) { | |
| 581 assert(tag != DataLayout::no_tag, "bad tag"); | |
| 582 assert(bytecode_has_profile(c), "agree w/ BHP"); | |
| 583 data_layout->initialize(tag, stream->bci(), cell_count); | |
| 584 return DataLayout::compute_size_in_bytes(cell_count); | |
| 585 } else { | |
| 586 assert(!bytecode_has_profile(c), "agree w/ !BHP"); | |
| 587 return 0; | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 // Get the data at an arbitrary (sort of) data index. | |
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592 ProfileData* MethodData::data_at(int data_index) const { |
| 0 | 593 if (out_of_bounds(data_index)) { |
| 594 return NULL; | |
| 595 } | |
| 596 DataLayout* data_layout = data_layout_at(data_index); | |
| 941 | 597 return data_layout->data_in(); |
| 598 } | |
| 0 | 599 |
| 941 | 600 ProfileData* DataLayout::data_in() { |
| 601 switch (tag()) { | |
| 0 | 602 case DataLayout::no_tag: |
| 603 default: | |
| 604 ShouldNotReachHere(); | |
| 605 return NULL; | |
| 606 case DataLayout::bit_data_tag: | |
| 941 | 607 return new BitData(this); |
| 0 | 608 case DataLayout::counter_data_tag: |
| 941 | 609 return new CounterData(this); |
| 0 | 610 case DataLayout::jump_data_tag: |
| 941 | 611 return new JumpData(this); |
| 0 | 612 case DataLayout::receiver_type_data_tag: |
| 941 | 613 return new ReceiverTypeData(this); |
| 0 | 614 case DataLayout::virtual_call_data_tag: |
| 941 | 615 return new VirtualCallData(this); |
| 0 | 616 case DataLayout::ret_data_tag: |
| 941 | 617 return new RetData(this); |
| 0 | 618 case DataLayout::branch_data_tag: |
| 941 | 619 return new BranchData(this); |
| 0 | 620 case DataLayout::multi_branch_data_tag: |
| 941 | 621 return new MultiBranchData(this); |
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622 case DataLayout::arg_info_data_tag: |
| 941 | 623 return new ArgInfoData(this); |
| 0 | 624 }; |
| 625 } | |
| 626 | |
| 627 // Iteration over data. | |
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628 ProfileData* MethodData::next_data(ProfileData* current) const { |
| 0 | 629 int current_index = dp_to_di(current->dp()); |
| 630 int next_index = current_index + current->size_in_bytes(); | |
| 631 ProfileData* next = data_at(next_index); | |
| 632 return next; | |
| 633 } | |
| 634 | |
| 635 // Give each of the data entries a chance to perform specific | |
| 636 // data initialization. | |
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637 void MethodData::post_initialize(BytecodeStream* stream) { |
| 0 | 638 ResourceMark rm; |
| 639 ProfileData* data; | |
| 640 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
| 641 stream->set_start(data->bci()); | |
| 642 stream->next(); | |
| 643 data->post_initialize(stream, this); | |
| 644 } | |
| 645 } | |
| 646 | |
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647 // Initialize the MethodData* corresponding to a given method. |
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648 MethodData::MethodData(methodHandle method, int size, TRAPS) { |
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649 No_Safepoint_Verifier no_safepoint; // init function atomic wrt GC |
| 0 | 650 ResourceMark rm; |
| 651 // Set the method back-pointer. | |
| 652 _method = method(); | |
| 1783 | 653 |
| 654 if (TieredCompilation) { | |
| 655 _invocation_counter.init(); | |
| 656 _backedge_counter.init(); | |
| 2252 | 657 _invocation_counter_start = 0; |
| 658 _backedge_counter_start = 0; | |
| 1783 | 659 _num_loops = 0; |
| 660 _num_blocks = 0; | |
| 661 _highest_comp_level = 0; | |
| 662 _highest_osr_comp_level = 0; | |
| 2252 | 663 _would_profile = true; |
| 1783 | 664 } |
| 0 | 665 set_creation_mileage(mileage_of(method())); |
| 666 | |
| 667 // Initialize flags and trap history. | |
| 668 _nof_decompiles = 0; | |
| 669 _nof_overflow_recompiles = 0; | |
| 670 _nof_overflow_traps = 0; | |
| 671 assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); | |
| 672 Copy::zero_to_words((HeapWord*) &_trap_hist, | |
| 673 sizeof(_trap_hist) / sizeof(HeapWord)); | |
| 674 | |
| 675 // Go through the bytecodes and allocate and initialize the | |
| 676 // corresponding data cells. | |
| 677 int data_size = 0; | |
| 678 int empty_bc_count = 0; // number of bytecodes lacking data | |
| 679 BytecodeStream stream(method); | |
| 680 Bytecodes::Code c; | |
| 681 while ((c = stream.next()) >= 0) { | |
| 682 int size_in_bytes = initialize_data(&stream, data_size); | |
| 683 data_size += size_in_bytes; | |
| 684 if (size_in_bytes == 0) empty_bc_count += 1; | |
| 685 } | |
| 686 _data_size = data_size; | |
| 687 int object_size = in_bytes(data_offset()) + data_size; | |
| 688 | |
| 689 // Add some extra DataLayout cells (at least one) to track stray traps. | |
| 690 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
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691 int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); |
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692 |
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693 // Add a cell to record information about modified arguments. |
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694 // Set up _args_modified array after traps cells so that |
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695 // the code for traps cells works. |
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696 DataLayout *dp = data_layout_at(data_size + extra_size); |
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697 |
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698 int arg_size = method->size_of_parameters(); |
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699 dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); |
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700 |
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701 object_size += extra_size + DataLayout::compute_size_in_bytes(arg_size+1); |
| 0 | 702 |
| 703 // Set an initial hint. Don't use set_hint_di() because | |
| 704 // first_di() may be out of bounds if data_size is 0. | |
| 705 // In that situation, _hint_di is never used, but at | |
| 706 // least well-defined. | |
| 707 _hint_di = first_di(); | |
| 708 | |
| 709 post_initialize(&stream); | |
| 710 | |
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711 set_size(object_size); |
| 0 | 712 } |
| 713 | |
| 714 // Get a measure of how much mileage the method has on it. | |
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715 int MethodData::mileage_of(Method* method) { |
| 0 | 716 int mileage = 0; |
| 1783 | 717 if (TieredCompilation) { |
| 718 mileage = MAX2(method->invocation_count(), method->backedge_count()); | |
| 719 } else { | |
| 720 int iic = method->interpreter_invocation_count(); | |
| 721 if (mileage < iic) mileage = iic; | |
| 722 InvocationCounter* ic = method->invocation_counter(); | |
| 723 InvocationCounter* bc = method->backedge_counter(); | |
| 724 int icval = ic->count(); | |
| 725 if (ic->carry()) icval += CompileThreshold; | |
| 726 if (mileage < icval) mileage = icval; | |
| 727 int bcval = bc->count(); | |
| 728 if (bc->carry()) bcval += CompileThreshold; | |
| 729 if (mileage < bcval) mileage = bcval; | |
| 730 } | |
| 0 | 731 return mileage; |
| 732 } | |
| 733 | |
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734 bool MethodData::is_mature() const { |
| 1783 | 735 return CompilationPolicy::policy()->is_mature(_method); |
| 0 | 736 } |
| 737 | |
| 738 // Translate a bci to its corresponding data index (di). | |
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739 address MethodData::bci_to_dp(int bci) { |
| 0 | 740 ResourceMark rm; |
| 741 ProfileData* data = data_before(bci); | |
| 742 ProfileData* prev = NULL; | |
| 743 for ( ; is_valid(data); data = next_data(data)) { | |
| 744 if (data->bci() >= bci) { | |
| 745 if (data->bci() == bci) set_hint_di(dp_to_di(data->dp())); | |
| 746 else if (prev != NULL) set_hint_di(dp_to_di(prev->dp())); | |
| 747 return data->dp(); | |
| 748 } | |
| 749 prev = data; | |
| 750 } | |
| 751 return (address)limit_data_position(); | |
| 752 } | |
| 753 | |
| 754 // Translate a bci to its corresponding data, or NULL. | |
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755 ProfileData* MethodData::bci_to_data(int bci) { |
| 0 | 756 ProfileData* data = data_before(bci); |
| 757 for ( ; is_valid(data); data = next_data(data)) { | |
| 758 if (data->bci() == bci) { | |
| 759 set_hint_di(dp_to_di(data->dp())); | |
| 760 return data; | |
| 761 } else if (data->bci() > bci) { | |
| 762 break; | |
| 763 } | |
| 764 } | |
| 765 return bci_to_extra_data(bci, false); | |
| 766 } | |
| 767 | |
| 768 // Translate a bci to its corresponding extra data, or NULL. | |
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769 ProfileData* MethodData::bci_to_extra_data(int bci, bool create_if_missing) { |
| 0 | 770 DataLayout* dp = extra_data_base(); |
| 771 DataLayout* end = extra_data_limit(); | |
| 772 DataLayout* avail = NULL; | |
| 773 for (; dp < end; dp = next_extra(dp)) { | |
| 774 // No need for "OrderAccess::load_acquire" ops, | |
| 775 // since the data structure is monotonic. | |
| 776 if (dp->tag() == DataLayout::no_tag) break; | |
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777 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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778 dp = end; // ArgInfoData is at the end of extra data section. |
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779 break; |
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780 } |
| 0 | 781 if (dp->bci() == bci) { |
| 782 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
| 783 return new BitData(dp); | |
| 784 } | |
| 785 } | |
| 786 if (create_if_missing && dp < end) { | |
| 787 // Allocate this one. There is no mutual exclusion, | |
| 788 // so two threads could allocate different BCIs to the | |
| 789 // same data layout. This means these extra data | |
| 790 // records, like most other MDO contents, must not be | |
| 791 // trusted too much. | |
| 792 DataLayout temp; | |
| 793 temp.initialize(DataLayout::bit_data_tag, bci, 0); | |
| 794 dp->release_set_header(temp.header()); | |
| 795 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
| 796 //NO: assert(dp->bci() == bci, "no concurrent allocation"); | |
| 797 return new BitData(dp); | |
| 798 } | |
| 799 return NULL; | |
| 800 } | |
| 801 | |
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802 ArgInfoData *MethodData::arg_info() { |
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803 DataLayout* dp = extra_data_base(); |
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804 DataLayout* end = extra_data_limit(); |
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805 for (; dp < end; dp = next_extra(dp)) { |
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806 if (dp->tag() == DataLayout::arg_info_data_tag) |
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807 return new ArgInfoData(dp); |
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808 } |
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809 return NULL; |
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810 } |
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811 |
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812 // Printing |
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813 |
| 0 | 814 #ifndef PRODUCT |
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815 |
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816 void MethodData::print_on(outputStream* st) const { |
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817 assert(is_methodData(), "should be method data"); |
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818 st->print("method data for "); |
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819 method()->print_value_on(st); |
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820 st->cr(); |
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821 print_data_on(st); |
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822 } |
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823 |
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824 #endif //PRODUCT |
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825 |
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826 void MethodData::print_value_on(outputStream* st) const { |
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827 assert(is_methodData(), "should be method data"); |
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828 st->print("method data for "); |
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829 method()->print_value_on(st); |
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830 } |
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831 |
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832 #ifndef PRODUCT |
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833 void MethodData::print_data_on(outputStream* st) const { |
| 0 | 834 ResourceMark rm; |
| 835 ProfileData* data = first_data(); | |
| 836 for ( ; is_valid(data); data = next_data(data)) { | |
| 837 st->print("%d", dp_to_di(data->dp())); | |
| 838 st->fill_to(6); | |
| 839 data->print_data_on(st); | |
| 840 } | |
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841 st->print_cr("--- Extra data:"); |
| 0 | 842 DataLayout* dp = extra_data_base(); |
| 843 DataLayout* end = extra_data_limit(); | |
| 844 for (; dp < end; dp = next_extra(dp)) { | |
| 845 // No need for "OrderAccess::load_acquire" ops, | |
| 846 // since the data structure is monotonic. | |
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847 if (dp->tag() == DataLayout::no_tag) continue; |
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848 if (dp->tag() == DataLayout::bit_data_tag) { |
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849 data = new BitData(dp); |
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850 } else { |
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851 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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852 data = new ArgInfoData(dp); |
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853 dp = end; // ArgInfoData is at the end of extra data section. |
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854 } |
| 0 | 855 st->print("%d", dp_to_di(data->dp())); |
| 856 st->fill_to(6); | |
| 857 data->print_data_on(st); | |
| 858 } | |
| 859 } | |
| 860 #endif | |
| 861 | |
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862 |
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863 // Verification |
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864 |
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865 void MethodData::verify_on(outputStream* st) { |
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866 guarantee(is_methodData(), "object must be method data"); |
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867 // guarantee(m->is_perm(), "should be in permspace"); |
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868 this->verify_data_on(st); |
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869 } |
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870 |
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871 void MethodData::verify_data_on(outputStream* st) { |
| 0 | 872 NEEDS_CLEANUP; |
| 873 // not yet implemented. | |
| 874 } |