Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.cpp @ 12355:cefad50507d8
Merge with hs25-b53
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Fri, 11 Oct 2013 10:38:03 +0200 |
| parents | 836a62f43af9 |
| children | 359f7e70ae7f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 7956 | 2 * Copyright (c) 2000, 2013, 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" | |
| 7956 | 30 #include "memory/heapInspection.hpp" |
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31 #include "oops/methodData.hpp" |
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32 #include "prims/jvmtiRedefineClasses.hpp" |
| 1972 | 33 #include "runtime/compilationPolicy.hpp" |
| 34 #include "runtime/deoptimization.hpp" | |
| 35 #include "runtime/handles.inline.hpp" | |
| 0 | 36 |
| 37 // ================================================================== | |
| 38 // DataLayout | |
| 39 // | |
| 40 // Overlay for generic profiling data. | |
| 41 | |
| 42 // Some types of data layouts need a length field. | |
| 43 bool DataLayout::needs_array_len(u1 tag) { | |
|
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44 return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag); |
| 0 | 45 } |
| 46 | |
| 47 // Perform generic initialization of the data. More specific | |
| 48 // initialization occurs in overrides of ProfileData::post_initialize. | |
| 49 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) { | |
| 50 _header._bits = (intptr_t)0; | |
| 51 _header._struct._tag = tag; | |
| 52 _header._struct._bci = bci; | |
| 53 for (int i = 0; i < cell_count; i++) { | |
| 54 set_cell_at(i, (intptr_t)0); | |
| 55 } | |
| 56 if (needs_array_len(tag)) { | |
| 57 set_cell_at(ArrayData::array_len_off_set, cell_count - 1); // -1 for header. | |
| 58 } | |
| 59 } | |
| 60 | |
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61 void DataLayout::clean_weak_klass_links(BoolObjectClosure* cl) { |
| 941 | 62 ResourceMark m; |
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63 data_in()->clean_weak_klass_links(cl); |
| 941 | 64 } |
| 65 | |
| 66 | |
| 0 | 67 // ================================================================== |
| 68 // ProfileData | |
| 69 // | |
| 70 // A ProfileData object is created to refer to a section of profiling | |
| 71 // data in a structured way. | |
| 72 | |
| 73 // Constructor for invalid ProfileData. | |
| 74 ProfileData::ProfileData() { | |
| 75 _data = NULL; | |
| 76 } | |
| 77 | |
| 78 #ifndef PRODUCT | |
| 79 void ProfileData::print_shared(outputStream* st, const char* name) { | |
| 80 st->print("bci: %d", bci()); | |
| 81 st->fill_to(tab_width_one); | |
| 82 st->print("%s", name); | |
| 83 tab(st); | |
| 84 int trap = trap_state(); | |
| 85 if (trap != 0) { | |
| 86 char buf[100]; | |
| 87 st->print("trap(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap)); | |
| 88 } | |
| 89 int flags = data()->flags(); | |
| 90 if (flags != 0) | |
| 91 st->print("flags(%d) ", flags); | |
| 92 } | |
| 93 | |
| 94 void ProfileData::tab(outputStream* st) { | |
| 95 st->fill_to(tab_width_two); | |
| 96 } | |
| 97 #endif // !PRODUCT | |
| 98 | |
| 99 // ================================================================== | |
| 100 // BitData | |
| 101 // | |
| 102 // A BitData corresponds to a one-bit flag. This is used to indicate | |
| 103 // whether a checkcast bytecode has seen a null value. | |
| 104 | |
| 105 | |
| 106 #ifndef PRODUCT | |
| 107 void BitData::print_data_on(outputStream* st) { | |
| 108 print_shared(st, "BitData"); | |
| 109 } | |
| 110 #endif // !PRODUCT | |
| 111 | |
| 112 // ================================================================== | |
| 113 // CounterData | |
| 114 // | |
| 115 // A CounterData corresponds to a simple counter. | |
| 116 | |
| 117 #ifndef PRODUCT | |
| 118 void CounterData::print_data_on(outputStream* st) { | |
| 119 print_shared(st, "CounterData"); | |
| 120 st->print_cr("count(%u)", count()); | |
| 121 } | |
| 122 #endif // !PRODUCT | |
| 123 | |
| 124 // ================================================================== | |
| 125 // JumpData | |
| 126 // | |
| 127 // A JumpData is used to access profiling information for a direct | |
| 128 // branch. It is a counter, used for counting the number of branches, | |
| 129 // plus a data displacement, used for realigning the data pointer to | |
| 130 // the corresponding target bci. | |
| 131 | |
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132 void JumpData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 133 assert(stream->bci() == bci(), "wrong pos"); |
| 134 int target; | |
| 135 Bytecodes::Code c = stream->code(); | |
| 136 if (c == Bytecodes::_goto_w || c == Bytecodes::_jsr_w) { | |
| 137 target = stream->dest_w(); | |
| 138 } else { | |
| 139 target = stream->dest(); | |
| 140 } | |
| 141 int my_di = mdo->dp_to_di(dp()); | |
| 142 int target_di = mdo->bci_to_di(target); | |
| 143 int offset = target_di - my_di; | |
| 144 set_displacement(offset); | |
| 145 } | |
| 146 | |
| 147 #ifndef PRODUCT | |
| 148 void JumpData::print_data_on(outputStream* st) { | |
| 149 print_shared(st, "JumpData"); | |
| 150 st->print_cr("taken(%u) displacement(%d)", taken(), displacement()); | |
| 151 } | |
| 152 #endif // !PRODUCT | |
| 153 | |
| 154 // ================================================================== | |
| 155 // ReceiverTypeData | |
| 156 // | |
| 157 // A ReceiverTypeData is used to access profiling information about a | |
| 158 // dynamic type check. It consists of a counter which counts the total times | |
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159 // that the check is reached, and a series of (Klass*, count) pairs |
| 0 | 160 // which are used to store a type profile for the receiver of the check. |
| 161 | |
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162 void ReceiverTypeData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { |
| 941 | 163 for (uint row = 0; row < row_limit(); row++) { |
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164 Klass* p = receiver(row); |
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165 if (p != NULL && !p->is_loader_alive(is_alive_cl)) { |
| 941 | 166 clear_row(row); |
| 167 } | |
| 168 } | |
| 169 } | |
| 170 | |
| 9765 | 171 #ifdef GRAAL |
| 172 void VirtualCallData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { | |
| 173 ReceiverTypeData::clean_weak_klass_links(is_alive_cl); | |
| 174 for (uint row = 0; row < method_row_limit(); row++) { | |
| 175 Method* p = method(row); | |
| 176 if (p != NULL && !p->method_holder()->is_loader_alive(is_alive_cl)) { | |
| 177 clear_method_row(row); | |
| 178 } | |
| 179 } | |
| 180 } | |
| 181 #endif // GRAAL | |
| 182 | |
| 0 | 183 #ifndef PRODUCT |
| 184 void ReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
| 185 uint row; | |
| 186 int entries = 0; | |
| 187 for (row = 0; row < row_limit(); row++) { | |
| 188 if (receiver(row) != NULL) entries++; | |
| 189 } | |
| 190 st->print_cr("count(%u) entries(%u)", count(), entries); | |
| 1783 | 191 int total = count(); |
| 192 for (row = 0; row < row_limit(); row++) { | |
| 193 if (receiver(row) != NULL) { | |
| 194 total += receiver_count(row); | |
| 195 } | |
| 196 } | |
| 0 | 197 for (row = 0; row < row_limit(); row++) { |
| 198 if (receiver(row) != NULL) { | |
| 199 tab(st); | |
| 200 receiver(row)->print_value_on(st); | |
| 1783 | 201 st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total); |
| 0 | 202 } |
| 203 } | |
| 204 } | |
| 205 void ReceiverTypeData::print_data_on(outputStream* st) { | |
| 206 print_shared(st, "ReceiverTypeData"); | |
| 207 print_receiver_data_on(st); | |
| 208 } | |
| 209 void VirtualCallData::print_data_on(outputStream* st) { | |
| 210 print_shared(st, "VirtualCallData"); | |
| 211 print_receiver_data_on(st); | |
| 212 } | |
| 213 #endif // !PRODUCT | |
| 214 | |
| 215 // ================================================================== | |
| 216 // RetData | |
| 217 // | |
| 218 // A RetData is used to access profiling information for a ret bytecode. | |
| 219 // It is composed of a count of the number of times that the ret has | |
| 220 // been executed, followed by a series of triples of the form | |
| 221 // (bci, count, di) which count the number of times that some bci was the | |
| 222 // target of the ret and cache a corresponding displacement. | |
| 223 | |
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224 void RetData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 225 for (uint row = 0; row < row_limit(); row++) { |
| 226 set_bci_displacement(row, -1); | |
| 227 set_bci(row, no_bci); | |
| 228 } | |
| 229 // release so other threads see a consistent state. bci is used as | |
| 230 // a valid flag for bci_displacement. | |
| 231 OrderAccess::release(); | |
| 232 } | |
| 233 | |
| 234 // This routine needs to atomically update the RetData structure, so the | |
| 235 // caller needs to hold the RetData_lock before it gets here. Since taking | |
| 236 // the lock can block (and allow GC) and since RetData is a ProfileData is a | |
| 237 // wrapper around a derived oop, taking the lock in _this_ method will | |
| 238 // basically cause the 'this' pointer's _data field to contain junk after the | |
| 239 // lock. We require the caller to take the lock before making the ProfileData | |
| 240 // structure. Currently the only caller is InterpreterRuntime::update_mdp_for_ret | |
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241 address RetData::fixup_ret(int return_bci, MethodData* h_mdo) { |
| 0 | 242 // First find the mdp which corresponds to the return bci. |
| 243 address mdp = h_mdo->bci_to_dp(return_bci); | |
| 244 | |
| 245 // Now check to see if any of the cache slots are open. | |
| 246 for (uint row = 0; row < row_limit(); row++) { | |
| 247 if (bci(row) == no_bci) { | |
| 248 set_bci_displacement(row, mdp - dp()); | |
| 249 set_bci_count(row, DataLayout::counter_increment); | |
| 250 // Barrier to ensure displacement is written before the bci; allows | |
| 251 // the interpreter to read displacement without fear of race condition. | |
| 252 release_set_bci(row, return_bci); | |
| 253 break; | |
| 254 } | |
| 255 } | |
| 256 return mdp; | |
| 257 } | |
| 258 | |
| 259 | |
| 260 #ifndef PRODUCT | |
| 261 void RetData::print_data_on(outputStream* st) { | |
| 262 print_shared(st, "RetData"); | |
| 263 uint row; | |
| 264 int entries = 0; | |
| 265 for (row = 0; row < row_limit(); row++) { | |
| 266 if (bci(row) != no_bci) entries++; | |
| 267 } | |
| 268 st->print_cr("count(%u) entries(%u)", count(), entries); | |
| 269 for (row = 0; row < row_limit(); row++) { | |
| 270 if (bci(row) != no_bci) { | |
| 271 tab(st); | |
| 272 st->print_cr("bci(%d: count(%u) displacement(%d))", | |
| 273 bci(row), bci_count(row), bci_displacement(row)); | |
| 274 } | |
| 275 } | |
| 276 } | |
| 277 #endif // !PRODUCT | |
| 278 | |
| 279 // ================================================================== | |
| 280 // BranchData | |
| 281 // | |
| 282 // A BranchData is used to access profiling data for a two-way branch. | |
| 283 // It consists of taken and not_taken counts as well as a data displacement | |
| 284 // for the taken case. | |
| 285 | |
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286 void BranchData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 287 assert(stream->bci() == bci(), "wrong pos"); |
| 288 int target = stream->dest(); | |
| 289 int my_di = mdo->dp_to_di(dp()); | |
| 290 int target_di = mdo->bci_to_di(target); | |
| 291 int offset = target_di - my_di; | |
| 292 set_displacement(offset); | |
| 293 } | |
| 294 | |
| 295 #ifndef PRODUCT | |
| 296 void BranchData::print_data_on(outputStream* st) { | |
| 297 print_shared(st, "BranchData"); | |
| 298 st->print_cr("taken(%u) displacement(%d)", | |
| 299 taken(), displacement()); | |
| 300 tab(st); | |
| 301 st->print_cr("not taken(%u)", not_taken()); | |
| 302 } | |
| 303 #endif | |
| 304 | |
| 305 // ================================================================== | |
| 306 // MultiBranchData | |
| 307 // | |
| 308 // A MultiBranchData is used to access profiling information for | |
| 309 // a multi-way branch (*switch bytecodes). It consists of a series | |
| 310 // of (count, displacement) pairs, which count the number of times each | |
| 311 // case was taken and specify the data displacment for each branch target. | |
| 312 | |
| 313 int MultiBranchData::compute_cell_count(BytecodeStream* stream) { | |
| 314 int cell_count = 0; | |
| 315 if (stream->code() == Bytecodes::_tableswitch) { | |
| 2142 | 316 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
| 317 cell_count = 1 + per_case_cell_count * (1 + sw.length()); // 1 for default | |
| 0 | 318 } else { |
| 2142 | 319 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
| 320 cell_count = 1 + per_case_cell_count * (sw.number_of_pairs() + 1); // 1 for default | |
| 0 | 321 } |
| 322 return cell_count; | |
| 323 } | |
| 324 | |
| 325 void MultiBranchData::post_initialize(BytecodeStream* stream, | |
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326 MethodData* mdo) { |
| 0 | 327 assert(stream->bci() == bci(), "wrong pos"); |
| 328 int target; | |
| 329 int my_di; | |
| 330 int target_di; | |
| 331 int offset; | |
| 332 if (stream->code() == Bytecodes::_tableswitch) { | |
| 2142 | 333 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
| 334 int len = sw.length(); | |
| 0 | 335 assert(array_len() == per_case_cell_count * (len + 1), "wrong len"); |
| 336 for (int count = 0; count < len; count++) { | |
| 2142 | 337 target = sw.dest_offset_at(count) + bci(); |
| 0 | 338 my_di = mdo->dp_to_di(dp()); |
| 339 target_di = mdo->bci_to_di(target); | |
| 340 offset = target_di - my_di; | |
| 341 set_displacement_at(count, offset); | |
| 342 } | |
| 2142 | 343 target = sw.default_offset() + bci(); |
| 0 | 344 my_di = mdo->dp_to_di(dp()); |
| 345 target_di = mdo->bci_to_di(target); | |
| 346 offset = target_di - my_di; | |
| 347 set_default_displacement(offset); | |
| 348 | |
| 349 } else { | |
| 2142 | 350 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
| 351 int npairs = sw.number_of_pairs(); | |
| 0 | 352 assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len"); |
| 353 for (int count = 0; count < npairs; count++) { | |
| 2142 | 354 LookupswitchPair pair = sw.pair_at(count); |
| 355 target = pair.offset() + bci(); | |
| 0 | 356 my_di = mdo->dp_to_di(dp()); |
| 357 target_di = mdo->bci_to_di(target); | |
| 358 offset = target_di - my_di; | |
| 359 set_displacement_at(count, offset); | |
| 360 } | |
| 2142 | 361 target = sw.default_offset() + bci(); |
| 0 | 362 my_di = mdo->dp_to_di(dp()); |
| 363 target_di = mdo->bci_to_di(target); | |
| 364 offset = target_di - my_di; | |
| 365 set_default_displacement(offset); | |
| 366 } | |
| 367 } | |
| 368 | |
| 369 #ifndef PRODUCT | |
| 370 void MultiBranchData::print_data_on(outputStream* st) { | |
| 371 print_shared(st, "MultiBranchData"); | |
| 372 st->print_cr("default_count(%u) displacement(%d)", | |
| 373 default_count(), default_displacement()); | |
| 374 int cases = number_of_cases(); | |
| 375 for (int i = 0; i < cases; i++) { | |
| 376 tab(st); | |
| 377 st->print_cr("count(%u) displacement(%d)", | |
| 378 count_at(i), displacement_at(i)); | |
| 379 } | |
| 380 } | |
| 381 #endif | |
| 382 | |
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383 #ifndef PRODUCT |
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384 void ArgInfoData::print_data_on(outputStream* st) { |
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385 print_shared(st, "ArgInfoData"); |
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386 int nargs = number_of_args(); |
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387 for (int i = 0; i < nargs; i++) { |
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388 st->print(" 0x%x", arg_modified(i)); |
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389 } |
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390 st->cr(); |
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391 } |
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392 |
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393 #endif |
| 0 | 394 // ================================================================== |
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395 // MethodData* |
| 0 | 396 // |
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397 // A MethodData* holds information which has been collected about |
| 0 | 398 // a method. |
| 399 | |
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400 MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS) { |
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401 int size = MethodData::compute_allocation_size_in_words(method); |
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402 |
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403 return new (loader_data, size, false, MetaspaceObj::MethodDataType, THREAD) |
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404 MethodData(method(), size, CHECK_NULL); |
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405 } |
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406 |
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407 int MethodData::bytecode_cell_count(Bytecodes::Code code) { |
| 8883 | 408 #if defined(COMPILER1) && !(defined(COMPILER2) || defined(GRAAL)) |
| 8860 | 409 return no_profile_data; |
| 410 #else | |
| 0 | 411 switch (code) { |
| 412 case Bytecodes::_checkcast: | |
| 413 case Bytecodes::_instanceof: | |
| 414 case Bytecodes::_aastore: | |
| 415 if (TypeProfileCasts) { | |
| 416 return ReceiverTypeData::static_cell_count(); | |
| 417 } else { | |
| 418 return BitData::static_cell_count(); | |
| 419 } | |
| 420 case Bytecodes::_invokespecial: | |
| 421 case Bytecodes::_invokestatic: | |
| 422 return CounterData::static_cell_count(); | |
| 423 case Bytecodes::_goto: | |
| 424 case Bytecodes::_goto_w: | |
| 425 case Bytecodes::_jsr: | |
| 426 case Bytecodes::_jsr_w: | |
| 427 return JumpData::static_cell_count(); | |
| 428 case Bytecodes::_invokevirtual: | |
| 429 case Bytecodes::_invokeinterface: | |
| 430 return VirtualCallData::static_cell_count(); | |
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431 case Bytecodes::_invokedynamic: |
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432 return CounterData::static_cell_count(); |
| 0 | 433 case Bytecodes::_ret: |
| 434 return RetData::static_cell_count(); | |
| 435 case Bytecodes::_ifeq: | |
| 436 case Bytecodes::_ifne: | |
| 437 case Bytecodes::_iflt: | |
| 438 case Bytecodes::_ifge: | |
| 439 case Bytecodes::_ifgt: | |
| 440 case Bytecodes::_ifle: | |
| 441 case Bytecodes::_if_icmpeq: | |
| 442 case Bytecodes::_if_icmpne: | |
| 443 case Bytecodes::_if_icmplt: | |
| 444 case Bytecodes::_if_icmpge: | |
| 445 case Bytecodes::_if_icmpgt: | |
| 446 case Bytecodes::_if_icmple: | |
| 447 case Bytecodes::_if_acmpeq: | |
| 448 case Bytecodes::_if_acmpne: | |
| 449 case Bytecodes::_ifnull: | |
| 450 case Bytecodes::_ifnonnull: | |
| 451 return BranchData::static_cell_count(); | |
| 452 case Bytecodes::_lookupswitch: | |
| 453 case Bytecodes::_tableswitch: | |
| 454 return variable_cell_count; | |
| 455 } | |
| 456 return no_profile_data; | |
| 8860 | 457 #endif |
| 0 | 458 } |
| 459 | |
| 460 // Compute the size of the profiling information corresponding to | |
| 461 // the current bytecode. | |
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462 int MethodData::compute_data_size(BytecodeStream* stream) { |
| 0 | 463 int cell_count = bytecode_cell_count(stream->code()); |
| 464 if (cell_count == no_profile_data) { | |
| 465 return 0; | |
| 466 } | |
| 467 if (cell_count == variable_cell_count) { | |
| 468 cell_count = MultiBranchData::compute_cell_count(stream); | |
| 469 } | |
| 470 // Note: cell_count might be zero, meaning that there is just | |
| 471 // a DataLayout header, with no extra cells. | |
| 472 assert(cell_count >= 0, "sanity"); | |
| 473 return DataLayout::compute_size_in_bytes(cell_count); | |
| 474 } | |
| 475 | |
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476 #ifdef GRAAL |
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477 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
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478 if (!ProfileTraps) return 0; |
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479 |
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480 // Assume that up to 30% of the possibly trapping BCIs with no MDP will need to allocate one. |
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481 return MIN2(empty_bc_count, MAX2(4, (empty_bc_count * 30) / 100)); |
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482 } |
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483 #else |
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484 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
| 0 | 485 if (ProfileTraps) { |
| 486 // Assume that up to 3% of BCIs with no MDP will need to allocate one. | |
| 487 int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1; | |
| 488 // If the method is large, let the extra BCIs grow numerous (to ~1%). | |
| 489 int one_percent_of_data | |
| 490 = (uint)data_size / (DataLayout::header_size_in_bytes()*128); | |
| 491 if (extra_data_count < one_percent_of_data) | |
| 492 extra_data_count = one_percent_of_data; | |
| 493 if (extra_data_count > empty_bc_count) | |
| 494 extra_data_count = empty_bc_count; // no need for more | |
| 495 return extra_data_count; | |
| 496 } else { | |
| 497 return 0; | |
| 498 } | |
| 499 } | |
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500 #endif |
| 0 | 501 |
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502 // Compute the size of the MethodData* necessary to store |
| 0 | 503 // profiling information about a given method. Size is in bytes. |
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504 int MethodData::compute_allocation_size_in_bytes(methodHandle method) { |
| 0 | 505 int data_size = 0; |
| 506 BytecodeStream stream(method); | |
| 507 Bytecodes::Code c; | |
| 508 int empty_bc_count = 0; // number of bytecodes lacking data | |
| 509 while ((c = stream.next()) >= 0) { | |
| 510 int size_in_bytes = compute_data_size(&stream); | |
| 511 data_size += size_in_bytes; | |
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512 |
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513 if (is_empty_data(size_in_bytes, c)) empty_bc_count++; |
| 0 | 514 } |
| 515 int object_size = in_bytes(data_offset()) + data_size; | |
| 516 | |
| 517 // Add some extra DataLayout cells (at least one) to track stray traps. | |
| 518 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
| 519 object_size += extra_data_count * DataLayout::compute_size_in_bytes(0); | |
| 520 | |
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521 #ifndef GRAALVM |
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522 // Add a cell to record information about modified arguments. |
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523 int arg_size = method->size_of_parameters(); |
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524 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
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525 #endif |
| 0 | 526 return object_size; |
| 527 } | |
| 528 | |
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529 // Compute the size of the MethodData* necessary to store |
| 0 | 530 // profiling information about a given method. Size is in words |
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531 int MethodData::compute_allocation_size_in_words(methodHandle method) { |
| 0 | 532 int byte_size = compute_allocation_size_in_bytes(method); |
| 533 int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord; | |
| 534 return align_object_size(word_size); | |
| 535 } | |
| 536 | |
| 537 // Initialize an individual data segment. Returns the size of | |
| 538 // the segment in bytes. | |
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539 int MethodData::initialize_data(BytecodeStream* stream, |
| 0 | 540 int data_index) { |
| 8883 | 541 #if defined(COMPILER1) && !(defined(COMPILER2) || defined(GRAAL)) |
| 8860 | 542 return 0; |
| 543 #else | |
| 0 | 544 int cell_count = -1; |
| 545 int tag = DataLayout::no_tag; | |
| 546 DataLayout* data_layout = data_layout_at(data_index); | |
| 547 Bytecodes::Code c = stream->code(); | |
| 548 switch (c) { | |
| 549 case Bytecodes::_checkcast: | |
| 550 case Bytecodes::_instanceof: | |
| 551 case Bytecodes::_aastore: | |
| 552 if (TypeProfileCasts) { | |
| 553 cell_count = ReceiverTypeData::static_cell_count(); | |
| 554 tag = DataLayout::receiver_type_data_tag; | |
| 555 } else { | |
| 556 cell_count = BitData::static_cell_count(); | |
| 557 tag = DataLayout::bit_data_tag; | |
| 558 } | |
| 559 break; | |
| 560 case Bytecodes::_invokespecial: | |
| 561 case Bytecodes::_invokestatic: | |
| 562 cell_count = CounterData::static_cell_count(); | |
| 563 tag = DataLayout::counter_data_tag; | |
| 564 break; | |
| 565 case Bytecodes::_goto: | |
| 566 case Bytecodes::_goto_w: | |
| 567 case Bytecodes::_jsr: | |
| 568 case Bytecodes::_jsr_w: | |
| 569 cell_count = JumpData::static_cell_count(); | |
| 570 tag = DataLayout::jump_data_tag; | |
| 571 break; | |
| 572 case Bytecodes::_invokevirtual: | |
| 573 case Bytecodes::_invokeinterface: | |
| 574 cell_count = VirtualCallData::static_cell_count(); | |
| 575 tag = DataLayout::virtual_call_data_tag; | |
| 576 break; | |
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577 case Bytecodes::_invokedynamic: |
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578 // %%% should make a type profile for any invokedynamic that takes a ref argument |
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579 cell_count = CounterData::static_cell_count(); |
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580 tag = DataLayout::counter_data_tag; |
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581 break; |
| 0 | 582 case Bytecodes::_ret: |
| 583 cell_count = RetData::static_cell_count(); | |
| 584 tag = DataLayout::ret_data_tag; | |
| 585 break; | |
| 586 case Bytecodes::_ifeq: | |
| 587 case Bytecodes::_ifne: | |
| 588 case Bytecodes::_iflt: | |
| 589 case Bytecodes::_ifge: | |
| 590 case Bytecodes::_ifgt: | |
| 591 case Bytecodes::_ifle: | |
| 592 case Bytecodes::_if_icmpeq: | |
| 593 case Bytecodes::_if_icmpne: | |
| 594 case Bytecodes::_if_icmplt: | |
| 595 case Bytecodes::_if_icmpge: | |
| 596 case Bytecodes::_if_icmpgt: | |
| 597 case Bytecodes::_if_icmple: | |
| 598 case Bytecodes::_if_acmpeq: | |
| 599 case Bytecodes::_if_acmpne: | |
| 600 case Bytecodes::_ifnull: | |
| 601 case Bytecodes::_ifnonnull: | |
| 602 cell_count = BranchData::static_cell_count(); | |
| 603 tag = DataLayout::branch_data_tag; | |
| 604 break; | |
| 605 case Bytecodes::_lookupswitch: | |
| 606 case Bytecodes::_tableswitch: | |
| 607 cell_count = MultiBranchData::compute_cell_count(stream); | |
| 608 tag = DataLayout::multi_branch_data_tag; | |
| 609 break; | |
| 610 } | |
| 611 assert(tag == DataLayout::multi_branch_data_tag || | |
| 612 cell_count == bytecode_cell_count(c), "cell counts must agree"); | |
| 613 if (cell_count >= 0) { | |
| 614 assert(tag != DataLayout::no_tag, "bad tag"); | |
| 615 assert(bytecode_has_profile(c), "agree w/ BHP"); | |
| 616 data_layout->initialize(tag, stream->bci(), cell_count); | |
| 617 return DataLayout::compute_size_in_bytes(cell_count); | |
| 618 } else { | |
| 619 assert(!bytecode_has_profile(c), "agree w/ !BHP"); | |
| 620 return 0; | |
| 621 } | |
| 8860 | 622 #endif |
| 0 | 623 } |
| 624 | |
| 625 // Get the data at an arbitrary (sort of) data index. | |
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626 ProfileData* MethodData::data_at(int data_index) const { |
| 0 | 627 if (out_of_bounds(data_index)) { |
| 628 return NULL; | |
| 629 } | |
| 630 DataLayout* data_layout = data_layout_at(data_index); | |
| 941 | 631 return data_layout->data_in(); |
| 632 } | |
| 0 | 633 |
| 941 | 634 ProfileData* DataLayout::data_in() { |
| 635 switch (tag()) { | |
| 0 | 636 case DataLayout::no_tag: |
| 637 default: | |
| 638 ShouldNotReachHere(); | |
| 639 return NULL; | |
| 640 case DataLayout::bit_data_tag: | |
| 941 | 641 return new BitData(this); |
| 0 | 642 case DataLayout::counter_data_tag: |
| 941 | 643 return new CounterData(this); |
| 0 | 644 case DataLayout::jump_data_tag: |
| 941 | 645 return new JumpData(this); |
| 0 | 646 case DataLayout::receiver_type_data_tag: |
| 941 | 647 return new ReceiverTypeData(this); |
| 0 | 648 case DataLayout::virtual_call_data_tag: |
| 941 | 649 return new VirtualCallData(this); |
| 0 | 650 case DataLayout::ret_data_tag: |
| 941 | 651 return new RetData(this); |
| 0 | 652 case DataLayout::branch_data_tag: |
| 941 | 653 return new BranchData(this); |
| 0 | 654 case DataLayout::multi_branch_data_tag: |
| 941 | 655 return new MultiBranchData(this); |
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656 case DataLayout::arg_info_data_tag: |
| 941 | 657 return new ArgInfoData(this); |
| 0 | 658 }; |
| 659 } | |
| 660 | |
| 661 // Iteration over data. | |
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662 ProfileData* MethodData::next_data(ProfileData* current) const { |
| 0 | 663 int current_index = dp_to_di(current->dp()); |
| 664 int next_index = current_index + current->size_in_bytes(); | |
| 665 ProfileData* next = data_at(next_index); | |
| 666 return next; | |
| 667 } | |
| 668 | |
| 669 // Give each of the data entries a chance to perform specific | |
| 670 // data initialization. | |
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671 void MethodData::post_initialize(BytecodeStream* stream) { |
| 0 | 672 ResourceMark rm; |
| 673 ProfileData* data; | |
| 674 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
| 675 stream->set_start(data->bci()); | |
| 676 stream->next(); | |
| 677 data->post_initialize(stream, this); | |
| 678 } | |
| 679 } | |
| 680 | |
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681 // Initialize the MethodData* corresponding to a given method. |
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682 MethodData::MethodData(methodHandle method, int size, TRAPS) { |
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683 // Set the method back-pointer. |
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684 _method = method(); |
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685 initialize(); |
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686 } |
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687 |
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688 void MethodData::initialize() { |
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689 No_Safepoint_Verifier no_safepoint; // init function atomic wrt GC |
| 0 | 690 ResourceMark rm; |
| 1783 | 691 |
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692 init(); |
| 0 | 693 set_creation_mileage(mileage_of(method())); |
| 694 | |
| 695 // Go through the bytecodes and allocate and initialize the | |
| 696 // corresponding data cells. | |
| 697 int data_size = 0; | |
| 698 int empty_bc_count = 0; // number of bytecodes lacking data | |
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699 _data[0] = 0; // apparently not set below. |
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700 BytecodeStream stream(method()); |
| 0 | 701 Bytecodes::Code c; |
| 702 while ((c = stream.next()) >= 0) { | |
| 703 int size_in_bytes = initialize_data(&stream, data_size); | |
| 704 data_size += size_in_bytes; | |
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705 |
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706 if (is_empty_data(size_in_bytes, c)) empty_bc_count++; |
| 0 | 707 } |
| 708 _data_size = data_size; | |
| 709 int object_size = in_bytes(data_offset()) + data_size; | |
| 710 | |
| 711 // Add some extra DataLayout cells (at least one) to track stray traps. | |
| 712 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
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713 int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); |
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714 object_size += extra_size; |
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715 |
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716 Copy::zero_to_bytes((HeapWord*) extra_data_base(), extra_size); |
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717 |
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718 #ifndef GRAALVM |
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719 // Add a cell to record information about modified arguments. |
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720 // Set up _args_modified array after traps cells so that |
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721 // the code for traps cells works. |
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722 DataLayout *dp = data_layout_at(data_size + extra_size); |
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723 |
| 8615 | 724 int arg_size = method()->size_of_parameters(); |
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725 dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); |
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726 |
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727 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
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728 #endif |
| 0 | 729 |
| 730 // Set an initial hint. Don't use set_hint_di() because | |
| 731 // first_di() may be out of bounds if data_size is 0. | |
| 732 // In that situation, _hint_di is never used, but at | |
| 733 // least well-defined. | |
| 734 _hint_di = first_di(); | |
| 735 | |
| 736 post_initialize(&stream); | |
| 737 | |
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738 set_size(object_size); |
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739 } |
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740 |
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741 void MethodData::init() { |
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742 _invocation_counter.init(); |
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743 _backedge_counter.init(); |
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744 _invocation_counter_start = 0; |
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745 _backedge_counter_start = 0; |
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746 _num_loops = 0; |
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747 _num_blocks = 0; |
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748 _highest_comp_level = 0; |
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749 _highest_osr_comp_level = 0; |
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750 _would_profile = true; |
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751 |
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752 // Initialize flags and trap history. |
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753 _nof_decompiles = 0; |
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754 _nof_overflow_recompiles = 0; |
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755 _nof_overflow_traps = 0; |
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756 clear_escape_info(); |
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757 assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); |
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758 Copy::zero_to_words((HeapWord*) &_trap_hist, |
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759 sizeof(_trap_hist) / sizeof(HeapWord)); |
| 0 | 760 } |
| 761 | |
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762 bool MethodData::is_empty_data(int size_in_bytes, Bytecodes::Code code) { |
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763 #ifdef GRAAL |
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764 return size_in_bytes == 0 && Bytecodes::can_trap(code); |
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765 #else |
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766 return size_in_bytes == 0; |
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767 #endif |
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768 } |
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769 |
| 0 | 770 // Get a measure of how much mileage the method has on it. |
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771 int MethodData::mileage_of(Method* method) { |
| 0 | 772 int mileage = 0; |
| 1783 | 773 if (TieredCompilation) { |
| 774 mileage = MAX2(method->invocation_count(), method->backedge_count()); | |
| 775 } else { | |
| 776 int iic = method->interpreter_invocation_count(); | |
| 777 if (mileage < iic) mileage = iic; | |
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778 MethodCounters* mcs = method->method_counters(); |
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779 if (mcs != NULL) { |
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780 InvocationCounter* ic = mcs->invocation_counter(); |
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781 InvocationCounter* bc = mcs->backedge_counter(); |
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782 int icval = ic->count(); |
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783 if (ic->carry()) icval += CompileThreshold; |
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784 if (mileage < icval) mileage = icval; |
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785 int bcval = bc->count(); |
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786 if (bc->carry()) bcval += CompileThreshold; |
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787 if (mileage < bcval) mileage = bcval; |
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788 } |
| 1783 | 789 } |
| 0 | 790 return mileage; |
| 791 } | |
| 792 | |
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793 bool MethodData::is_mature() const { |
| 1783 | 794 return CompilationPolicy::policy()->is_mature(_method); |
| 0 | 795 } |
| 796 | |
| 797 // Translate a bci to its corresponding data index (di). | |
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798 address MethodData::bci_to_dp(int bci) { |
| 0 | 799 ResourceMark rm; |
| 800 ProfileData* data = data_before(bci); | |
| 801 ProfileData* prev = NULL; | |
| 802 for ( ; is_valid(data); data = next_data(data)) { | |
| 803 if (data->bci() >= bci) { | |
| 804 if (data->bci() == bci) set_hint_di(dp_to_di(data->dp())); | |
| 805 else if (prev != NULL) set_hint_di(dp_to_di(prev->dp())); | |
| 806 return data->dp(); | |
| 807 } | |
| 808 prev = data; | |
| 809 } | |
| 810 return (address)limit_data_position(); | |
| 811 } | |
| 812 | |
| 813 // Translate a bci to its corresponding data, or NULL. | |
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814 ProfileData* MethodData::bci_to_data(int bci) { |
| 0 | 815 ProfileData* data = data_before(bci); |
| 816 for ( ; is_valid(data); data = next_data(data)) { | |
| 817 if (data->bci() == bci) { | |
| 818 set_hint_di(dp_to_di(data->dp())); | |
| 819 return data; | |
| 820 } else if (data->bci() > bci) { | |
| 821 break; | |
| 822 } | |
| 823 } | |
| 824 return bci_to_extra_data(bci, false); | |
| 825 } | |
| 826 | |
| 827 // Translate a bci to its corresponding extra data, or NULL. | |
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828 ProfileData* MethodData::bci_to_extra_data(int bci, bool create_if_missing) { |
| 0 | 829 DataLayout* dp = extra_data_base(); |
| 830 DataLayout* end = extra_data_limit(); | |
| 831 DataLayout* avail = NULL; | |
| 832 for (; dp < end; dp = next_extra(dp)) { | |
| 833 // No need for "OrderAccess::load_acquire" ops, | |
| 834 // since the data structure is monotonic. | |
| 835 if (dp->tag() == DataLayout::no_tag) break; | |
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836 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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837 dp = end; // ArgInfoData is at the end of extra data section. |
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838 break; |
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839 } |
| 0 | 840 if (dp->bci() == bci) { |
| 841 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
| 842 return new BitData(dp); | |
| 843 } | |
| 844 } | |
| 845 if (create_if_missing && dp < end) { | |
| 846 // Allocate this one. There is no mutual exclusion, | |
| 847 // so two threads could allocate different BCIs to the | |
| 848 // same data layout. This means these extra data | |
| 849 // records, like most other MDO contents, must not be | |
| 850 // trusted too much. | |
| 851 DataLayout temp; | |
| 852 temp.initialize(DataLayout::bit_data_tag, bci, 0); | |
| 853 dp->release_set_header(temp.header()); | |
| 854 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
| 855 //NO: assert(dp->bci() == bci, "no concurrent allocation"); | |
| 856 return new BitData(dp); | |
| 857 } | |
| 858 return NULL; | |
| 859 } | |
| 860 | |
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861 ArgInfoData *MethodData::arg_info() { |
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862 DataLayout* dp = extra_data_base(); |
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863 DataLayout* end = extra_data_limit(); |
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864 for (; dp < end; dp = next_extra(dp)) { |
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865 if (dp->tag() == DataLayout::arg_info_data_tag) |
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866 return new ArgInfoData(dp); |
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867 } |
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868 return NULL; |
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869 } |
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870 |
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871 // Printing |
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872 |
| 0 | 873 #ifndef PRODUCT |
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874 |
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875 void MethodData::print_on(outputStream* st) const { |
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876 assert(is_methodData(), "should be method data"); |
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877 st->print("method data for "); |
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878 method()->print_value_on(st); |
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879 st->cr(); |
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880 print_data_on(st); |
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881 } |
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882 |
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883 #endif //PRODUCT |
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884 |
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885 void MethodData::print_value_on(outputStream* st) const { |
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886 assert(is_methodData(), "should be method data"); |
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887 st->print("method data for "); |
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888 method()->print_value_on(st); |
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889 } |
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890 |
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891 #ifndef PRODUCT |
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892 void MethodData::print_data_on(outputStream* st) const { |
| 0 | 893 ResourceMark rm; |
| 894 ProfileData* data = first_data(); | |
| 895 for ( ; is_valid(data); data = next_data(data)) { | |
| 896 st->print("%d", dp_to_di(data->dp())); | |
| 897 st->fill_to(6); | |
| 898 data->print_data_on(st); | |
| 899 } | |
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900 st->print_cr("--- Extra data:"); |
| 0 | 901 DataLayout* dp = extra_data_base(); |
| 902 DataLayout* end = extra_data_limit(); | |
| 903 for (; dp < end; dp = next_extra(dp)) { | |
| 904 // No need for "OrderAccess::load_acquire" ops, | |
| 905 // since the data structure is monotonic. | |
|
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906 if (dp->tag() == DataLayout::no_tag) continue; |
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907 if (dp->tag() == DataLayout::bit_data_tag) { |
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908 data = new BitData(dp); |
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909 } else { |
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910 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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911 data = new ArgInfoData(dp); |
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912 dp = end; // ArgInfoData is at the end of extra data section. |
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913 } |
| 0 | 914 st->print("%d", dp_to_di(data->dp())); |
| 915 st->fill_to(6); | |
| 916 data->print_data_on(st); | |
| 917 } | |
| 918 } | |
| 919 #endif | |
| 920 | |
| 7956 | 921 #if INCLUDE_SERVICES |
| 922 // Size Statistics | |
| 923 void MethodData::collect_statistics(KlassSizeStats *sz) const { | |
| 924 int n = sz->count(this); | |
| 925 sz->_method_data_bytes += n; | |
| 926 sz->_method_all_bytes += n; | |
| 927 sz->_rw_bytes += n; | |
| 928 } | |
| 929 #endif // INCLUDE_SERVICES | |
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930 |
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931 // Verification |
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932 |
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933 void MethodData::verify_on(outputStream* st) { |
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934 guarantee(is_methodData(), "object must be method data"); |
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935 // guarantee(m->is_perm(), "should be in permspace"); |
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936 this->verify_data_on(st); |
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937 } |
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938 |
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939 void MethodData::verify_data_on(outputStream* st) { |
| 0 | 940 NEEDS_CLEANUP; |
| 941 // not yet implemented. | |
| 942 } |