Mercurial > hg > graal-compiler
annotate src/share/vm/oops/methodData.cpp @ 14420:abe03600372a
8024468: PPC64 (part 201): cppInterpreter: implement bytecode profiling
Summary: Implement profiling for c2 jit compilation. Also enable new cppInterpreter features.
Reviewed-by: kvn
| author | goetz |
|---|---|
| date | Sun, 15 Sep 2013 15:28:58 +0200 |
| parents | a1ebd310d5c1 |
| children | 2b8e28fdf503 |
| 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 | |
| 0 | 171 #ifndef PRODUCT |
| 172 void ReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
| 173 uint row; | |
| 174 int entries = 0; | |
| 175 for (row = 0; row < row_limit(); row++) { | |
| 176 if (receiver(row) != NULL) entries++; | |
| 177 } | |
| 178 st->print_cr("count(%u) entries(%u)", count(), entries); | |
| 1783 | 179 int total = count(); |
| 180 for (row = 0; row < row_limit(); row++) { | |
| 181 if (receiver(row) != NULL) { | |
| 182 total += receiver_count(row); | |
| 183 } | |
| 184 } | |
| 0 | 185 for (row = 0; row < row_limit(); row++) { |
| 186 if (receiver(row) != NULL) { | |
| 187 tab(st); | |
| 188 receiver(row)->print_value_on(st); | |
| 1783 | 189 st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total); |
| 0 | 190 } |
| 191 } | |
| 192 } | |
| 193 void ReceiverTypeData::print_data_on(outputStream* st) { | |
| 194 print_shared(st, "ReceiverTypeData"); | |
| 195 print_receiver_data_on(st); | |
| 196 } | |
| 197 void VirtualCallData::print_data_on(outputStream* st) { | |
| 198 print_shared(st, "VirtualCallData"); | |
| 199 print_receiver_data_on(st); | |
| 200 } | |
| 201 #endif // !PRODUCT | |
| 202 | |
| 203 // ================================================================== | |
| 204 // RetData | |
| 205 // | |
| 206 // A RetData is used to access profiling information for a ret bytecode. | |
| 207 // It is composed of a count of the number of times that the ret has | |
| 208 // been executed, followed by a series of triples of the form | |
| 209 // (bci, count, di) which count the number of times that some bci was the | |
| 210 // target of the ret and cache a corresponding displacement. | |
| 211 | |
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212 void RetData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 213 for (uint row = 0; row < row_limit(); row++) { |
| 214 set_bci_displacement(row, -1); | |
| 215 set_bci(row, no_bci); | |
| 216 } | |
| 217 // release so other threads see a consistent state. bci is used as | |
| 218 // a valid flag for bci_displacement. | |
| 219 OrderAccess::release(); | |
| 220 } | |
| 221 | |
| 222 // This routine needs to atomically update the RetData structure, so the | |
| 223 // caller needs to hold the RetData_lock before it gets here. Since taking | |
| 224 // the lock can block (and allow GC) and since RetData is a ProfileData is a | |
| 225 // wrapper around a derived oop, taking the lock in _this_ method will | |
| 226 // basically cause the 'this' pointer's _data field to contain junk after the | |
| 227 // lock. We require the caller to take the lock before making the ProfileData | |
| 228 // structure. Currently the only caller is InterpreterRuntime::update_mdp_for_ret | |
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229 address RetData::fixup_ret(int return_bci, MethodData* h_mdo) { |
| 0 | 230 // First find the mdp which corresponds to the return bci. |
| 231 address mdp = h_mdo->bci_to_dp(return_bci); | |
| 232 | |
| 233 // Now check to see if any of the cache slots are open. | |
| 234 for (uint row = 0; row < row_limit(); row++) { | |
| 235 if (bci(row) == no_bci) { | |
| 236 set_bci_displacement(row, mdp - dp()); | |
| 237 set_bci_count(row, DataLayout::counter_increment); | |
| 238 // Barrier to ensure displacement is written before the bci; allows | |
| 239 // the interpreter to read displacement without fear of race condition. | |
| 240 release_set_bci(row, return_bci); | |
| 241 break; | |
| 242 } | |
| 243 } | |
| 244 return mdp; | |
| 245 } | |
| 246 | |
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247 #ifdef CC_INTERP |
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248 DataLayout* RetData::advance(MethodData *md, int bci) { |
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249 return (DataLayout*) md->bci_to_dp(bci); |
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250 } |
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251 #endif // CC_INTERP |
| 0 | 252 |
| 253 #ifndef PRODUCT | |
| 254 void RetData::print_data_on(outputStream* st) { | |
| 255 print_shared(st, "RetData"); | |
| 256 uint row; | |
| 257 int entries = 0; | |
| 258 for (row = 0; row < row_limit(); row++) { | |
| 259 if (bci(row) != no_bci) entries++; | |
| 260 } | |
| 261 st->print_cr("count(%u) entries(%u)", count(), entries); | |
| 262 for (row = 0; row < row_limit(); row++) { | |
| 263 if (bci(row) != no_bci) { | |
| 264 tab(st); | |
| 265 st->print_cr("bci(%d: count(%u) displacement(%d))", | |
| 266 bci(row), bci_count(row), bci_displacement(row)); | |
| 267 } | |
| 268 } | |
| 269 } | |
| 270 #endif // !PRODUCT | |
| 271 | |
| 272 // ================================================================== | |
| 273 // BranchData | |
| 274 // | |
| 275 // A BranchData is used to access profiling data for a two-way branch. | |
| 276 // It consists of taken and not_taken counts as well as a data displacement | |
| 277 // for the taken case. | |
| 278 | |
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279 void BranchData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
| 0 | 280 assert(stream->bci() == bci(), "wrong pos"); |
| 281 int target = stream->dest(); | |
| 282 int my_di = mdo->dp_to_di(dp()); | |
| 283 int target_di = mdo->bci_to_di(target); | |
| 284 int offset = target_di - my_di; | |
| 285 set_displacement(offset); | |
| 286 } | |
| 287 | |
| 288 #ifndef PRODUCT | |
| 289 void BranchData::print_data_on(outputStream* st) { | |
| 290 print_shared(st, "BranchData"); | |
| 291 st->print_cr("taken(%u) displacement(%d)", | |
| 292 taken(), displacement()); | |
| 293 tab(st); | |
| 294 st->print_cr("not taken(%u)", not_taken()); | |
| 295 } | |
| 296 #endif | |
| 297 | |
| 298 // ================================================================== | |
| 299 // MultiBranchData | |
| 300 // | |
| 301 // A MultiBranchData is used to access profiling information for | |
| 302 // a multi-way branch (*switch bytecodes). It consists of a series | |
| 303 // of (count, displacement) pairs, which count the number of times each | |
| 304 // case was taken and specify the data displacment for each branch target. | |
| 305 | |
| 306 int MultiBranchData::compute_cell_count(BytecodeStream* stream) { | |
| 307 int cell_count = 0; | |
| 308 if (stream->code() == Bytecodes::_tableswitch) { | |
| 2142 | 309 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
| 310 cell_count = 1 + per_case_cell_count * (1 + sw.length()); // 1 for default | |
| 0 | 311 } else { |
| 2142 | 312 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
| 313 cell_count = 1 + per_case_cell_count * (sw.number_of_pairs() + 1); // 1 for default | |
| 0 | 314 } |
| 315 return cell_count; | |
| 316 } | |
| 317 | |
| 318 void MultiBranchData::post_initialize(BytecodeStream* stream, | |
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319 MethodData* mdo) { |
| 0 | 320 assert(stream->bci() == bci(), "wrong pos"); |
| 321 int target; | |
| 322 int my_di; | |
| 323 int target_di; | |
| 324 int offset; | |
| 325 if (stream->code() == Bytecodes::_tableswitch) { | |
| 2142 | 326 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
| 327 int len = sw.length(); | |
| 0 | 328 assert(array_len() == per_case_cell_count * (len + 1), "wrong len"); |
| 329 for (int count = 0; count < len; count++) { | |
| 2142 | 330 target = sw.dest_offset_at(count) + 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_displacement_at(count, offset); | |
| 335 } | |
| 2142 | 336 target = sw.default_offset() + bci(); |
| 0 | 337 my_di = mdo->dp_to_di(dp()); |
| 338 target_di = mdo->bci_to_di(target); | |
| 339 offset = target_di - my_di; | |
| 340 set_default_displacement(offset); | |
| 341 | |
| 342 } else { | |
| 2142 | 343 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
| 344 int npairs = sw.number_of_pairs(); | |
| 0 | 345 assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len"); |
| 346 for (int count = 0; count < npairs; count++) { | |
| 2142 | 347 LookupswitchPair pair = sw.pair_at(count); |
| 348 target = pair.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_displacement_at(count, offset); | |
| 353 } | |
| 2142 | 354 target = sw.default_offset() + bci(); |
| 0 | 355 my_di = mdo->dp_to_di(dp()); |
| 356 target_di = mdo->bci_to_di(target); | |
| 357 offset = target_di - my_di; | |
| 358 set_default_displacement(offset); | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 #ifndef PRODUCT | |
| 363 void MultiBranchData::print_data_on(outputStream* st) { | |
| 364 print_shared(st, "MultiBranchData"); | |
| 365 st->print_cr("default_count(%u) displacement(%d)", | |
| 366 default_count(), default_displacement()); | |
| 367 int cases = number_of_cases(); | |
| 368 for (int i = 0; i < cases; i++) { | |
| 369 tab(st); | |
| 370 st->print_cr("count(%u) displacement(%d)", | |
| 371 count_at(i), displacement_at(i)); | |
| 372 } | |
| 373 } | |
| 374 #endif | |
| 375 | |
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376 #ifndef PRODUCT |
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377 void ArgInfoData::print_data_on(outputStream* st) { |
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378 print_shared(st, "ArgInfoData"); |
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379 int nargs = number_of_args(); |
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380 for (int i = 0; i < nargs; i++) { |
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381 st->print(" 0x%x", arg_modified(i)); |
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382 } |
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383 st->cr(); |
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384 } |
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385 |
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386 #endif |
| 0 | 387 // ================================================================== |
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388 // MethodData* |
| 0 | 389 // |
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390 // A MethodData* holds information which has been collected about |
| 0 | 391 // a method. |
| 392 | |
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393 MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS) { |
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394 int size = MethodData::compute_allocation_size_in_words(method); |
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395 |
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396 return new (loader_data, size, false, MetaspaceObj::MethodDataType, THREAD) |
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397 MethodData(method(), size, CHECK_NULL); |
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398 } |
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399 |
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400 int MethodData::bytecode_cell_count(Bytecodes::Code code) { |
| 8860 | 401 #if defined(COMPILER1) && !defined(COMPILER2) |
| 402 return no_profile_data; | |
| 403 #else | |
| 0 | 404 switch (code) { |
| 405 case Bytecodes::_checkcast: | |
| 406 case Bytecodes::_instanceof: | |
| 407 case Bytecodes::_aastore: | |
| 408 if (TypeProfileCasts) { | |
| 409 return ReceiverTypeData::static_cell_count(); | |
| 410 } else { | |
| 411 return BitData::static_cell_count(); | |
| 412 } | |
| 413 case Bytecodes::_invokespecial: | |
| 414 case Bytecodes::_invokestatic: | |
| 415 return CounterData::static_cell_count(); | |
| 416 case Bytecodes::_goto: | |
| 417 case Bytecodes::_goto_w: | |
| 418 case Bytecodes::_jsr: | |
| 419 case Bytecodes::_jsr_w: | |
| 420 return JumpData::static_cell_count(); | |
| 421 case Bytecodes::_invokevirtual: | |
| 422 case Bytecodes::_invokeinterface: | |
| 423 return VirtualCallData::static_cell_count(); | |
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424 case Bytecodes::_invokedynamic: |
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425 return CounterData::static_cell_count(); |
| 0 | 426 case Bytecodes::_ret: |
| 427 return RetData::static_cell_count(); | |
| 428 case Bytecodes::_ifeq: | |
| 429 case Bytecodes::_ifne: | |
| 430 case Bytecodes::_iflt: | |
| 431 case Bytecodes::_ifge: | |
| 432 case Bytecodes::_ifgt: | |
| 433 case Bytecodes::_ifle: | |
| 434 case Bytecodes::_if_icmpeq: | |
| 435 case Bytecodes::_if_icmpne: | |
| 436 case Bytecodes::_if_icmplt: | |
| 437 case Bytecodes::_if_icmpge: | |
| 438 case Bytecodes::_if_icmpgt: | |
| 439 case Bytecodes::_if_icmple: | |
| 440 case Bytecodes::_if_acmpeq: | |
| 441 case Bytecodes::_if_acmpne: | |
| 442 case Bytecodes::_ifnull: | |
| 443 case Bytecodes::_ifnonnull: | |
| 444 return BranchData::static_cell_count(); | |
| 445 case Bytecodes::_lookupswitch: | |
| 446 case Bytecodes::_tableswitch: | |
| 447 return variable_cell_count; | |
| 448 } | |
| 449 return no_profile_data; | |
| 8860 | 450 #endif |
| 0 | 451 } |
| 452 | |
| 453 // Compute the size of the profiling information corresponding to | |
| 454 // the current bytecode. | |
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455 int MethodData::compute_data_size(BytecodeStream* stream) { |
| 0 | 456 int cell_count = bytecode_cell_count(stream->code()); |
| 457 if (cell_count == no_profile_data) { | |
| 458 return 0; | |
| 459 } | |
| 460 if (cell_count == variable_cell_count) { | |
| 461 cell_count = MultiBranchData::compute_cell_count(stream); | |
| 462 } | |
| 463 // Note: cell_count might be zero, meaning that there is just | |
| 464 // a DataLayout header, with no extra cells. | |
| 465 assert(cell_count >= 0, "sanity"); | |
| 466 return DataLayout::compute_size_in_bytes(cell_count); | |
| 467 } | |
| 468 | |
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469 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
| 0 | 470 if (ProfileTraps) { |
| 471 // Assume that up to 3% of BCIs with no MDP will need to allocate one. | |
| 472 int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1; | |
| 473 // If the method is large, let the extra BCIs grow numerous (to ~1%). | |
| 474 int one_percent_of_data | |
| 475 = (uint)data_size / (DataLayout::header_size_in_bytes()*128); | |
| 476 if (extra_data_count < one_percent_of_data) | |
| 477 extra_data_count = one_percent_of_data; | |
| 478 if (extra_data_count > empty_bc_count) | |
| 479 extra_data_count = empty_bc_count; // no need for more | |
| 480 return extra_data_count; | |
| 481 } else { | |
| 482 return 0; | |
| 483 } | |
| 484 } | |
| 485 | |
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486 // Compute the size of the MethodData* necessary to store |
| 0 | 487 // profiling information about a given method. Size is in bytes. |
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488 int MethodData::compute_allocation_size_in_bytes(methodHandle method) { |
| 0 | 489 int data_size = 0; |
| 490 BytecodeStream stream(method); | |
| 491 Bytecodes::Code c; | |
| 492 int empty_bc_count = 0; // number of bytecodes lacking data | |
| 493 while ((c = stream.next()) >= 0) { | |
| 494 int size_in_bytes = compute_data_size(&stream); | |
| 495 data_size += size_in_bytes; | |
| 496 if (size_in_bytes == 0) empty_bc_count += 1; | |
| 497 } | |
| 498 int object_size = in_bytes(data_offset()) + data_size; | |
| 499 | |
| 500 // Add some extra DataLayout cells (at least one) to track stray traps. | |
| 501 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
| 502 object_size += extra_data_count * DataLayout::compute_size_in_bytes(0); | |
| 503 | |
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504 // Add a cell to record information about modified arguments. |
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505 int arg_size = method->size_of_parameters(); |
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506 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
| 0 | 507 return object_size; |
| 508 } | |
| 509 | |
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510 // Compute the size of the MethodData* necessary to store |
| 0 | 511 // profiling information about a given method. Size is in words |
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512 int MethodData::compute_allocation_size_in_words(methodHandle method) { |
| 0 | 513 int byte_size = compute_allocation_size_in_bytes(method); |
| 514 int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord; | |
| 515 return align_object_size(word_size); | |
| 516 } | |
| 517 | |
| 518 // Initialize an individual data segment. Returns the size of | |
| 519 // the segment in bytes. | |
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520 int MethodData::initialize_data(BytecodeStream* stream, |
| 0 | 521 int data_index) { |
| 8860 | 522 #if defined(COMPILER1) && !defined(COMPILER2) |
| 523 return 0; | |
| 524 #else | |
| 0 | 525 int cell_count = -1; |
| 526 int tag = DataLayout::no_tag; | |
| 527 DataLayout* data_layout = data_layout_at(data_index); | |
| 528 Bytecodes::Code c = stream->code(); | |
| 529 switch (c) { | |
| 530 case Bytecodes::_checkcast: | |
| 531 case Bytecodes::_instanceof: | |
| 532 case Bytecodes::_aastore: | |
| 533 if (TypeProfileCasts) { | |
| 534 cell_count = ReceiverTypeData::static_cell_count(); | |
| 535 tag = DataLayout::receiver_type_data_tag; | |
| 536 } else { | |
| 537 cell_count = BitData::static_cell_count(); | |
| 538 tag = DataLayout::bit_data_tag; | |
| 539 } | |
| 540 break; | |
| 541 case Bytecodes::_invokespecial: | |
| 542 case Bytecodes::_invokestatic: | |
| 543 cell_count = CounterData::static_cell_count(); | |
| 544 tag = DataLayout::counter_data_tag; | |
| 545 break; | |
| 546 case Bytecodes::_goto: | |
| 547 case Bytecodes::_goto_w: | |
| 548 case Bytecodes::_jsr: | |
| 549 case Bytecodes::_jsr_w: | |
| 550 cell_count = JumpData::static_cell_count(); | |
| 551 tag = DataLayout::jump_data_tag; | |
| 552 break; | |
| 553 case Bytecodes::_invokevirtual: | |
| 554 case Bytecodes::_invokeinterface: | |
| 555 cell_count = VirtualCallData::static_cell_count(); | |
| 556 tag = DataLayout::virtual_call_data_tag; | |
| 557 break; | |
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558 case Bytecodes::_invokedynamic: |
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559 // %%% should make a type profile for any invokedynamic that takes a ref argument |
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560 cell_count = CounterData::static_cell_count(); |
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561 tag = DataLayout::counter_data_tag; |
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562 break; |
| 0 | 563 case Bytecodes::_ret: |
| 564 cell_count = RetData::static_cell_count(); | |
| 565 tag = DataLayout::ret_data_tag; | |
| 566 break; | |
| 567 case Bytecodes::_ifeq: | |
| 568 case Bytecodes::_ifne: | |
| 569 case Bytecodes::_iflt: | |
| 570 case Bytecodes::_ifge: | |
| 571 case Bytecodes::_ifgt: | |
| 572 case Bytecodes::_ifle: | |
| 573 case Bytecodes::_if_icmpeq: | |
| 574 case Bytecodes::_if_icmpne: | |
| 575 case Bytecodes::_if_icmplt: | |
| 576 case Bytecodes::_if_icmpge: | |
| 577 case Bytecodes::_if_icmpgt: | |
| 578 case Bytecodes::_if_icmple: | |
| 579 case Bytecodes::_if_acmpeq: | |
| 580 case Bytecodes::_if_acmpne: | |
| 581 case Bytecodes::_ifnull: | |
| 582 case Bytecodes::_ifnonnull: | |
| 583 cell_count = BranchData::static_cell_count(); | |
| 584 tag = DataLayout::branch_data_tag; | |
| 585 break; | |
| 586 case Bytecodes::_lookupswitch: | |
| 587 case Bytecodes::_tableswitch: | |
| 588 cell_count = MultiBranchData::compute_cell_count(stream); | |
| 589 tag = DataLayout::multi_branch_data_tag; | |
| 590 break; | |
| 591 } | |
| 592 assert(tag == DataLayout::multi_branch_data_tag || | |
| 593 cell_count == bytecode_cell_count(c), "cell counts must agree"); | |
| 594 if (cell_count >= 0) { | |
| 595 assert(tag != DataLayout::no_tag, "bad tag"); | |
| 596 assert(bytecode_has_profile(c), "agree w/ BHP"); | |
| 597 data_layout->initialize(tag, stream->bci(), cell_count); | |
| 598 return DataLayout::compute_size_in_bytes(cell_count); | |
| 599 } else { | |
| 600 assert(!bytecode_has_profile(c), "agree w/ !BHP"); | |
| 601 return 0; | |
| 602 } | |
| 8860 | 603 #endif |
| 0 | 604 } |
| 605 | |
| 606 // Get the data at an arbitrary (sort of) data index. | |
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607 ProfileData* MethodData::data_at(int data_index) const { |
| 0 | 608 if (out_of_bounds(data_index)) { |
| 609 return NULL; | |
| 610 } | |
| 611 DataLayout* data_layout = data_layout_at(data_index); | |
| 941 | 612 return data_layout->data_in(); |
| 613 } | |
| 0 | 614 |
| 941 | 615 ProfileData* DataLayout::data_in() { |
| 616 switch (tag()) { | |
| 0 | 617 case DataLayout::no_tag: |
| 618 default: | |
| 619 ShouldNotReachHere(); | |
| 620 return NULL; | |
| 621 case DataLayout::bit_data_tag: | |
| 941 | 622 return new BitData(this); |
| 0 | 623 case DataLayout::counter_data_tag: |
| 941 | 624 return new CounterData(this); |
| 0 | 625 case DataLayout::jump_data_tag: |
| 941 | 626 return new JumpData(this); |
| 0 | 627 case DataLayout::receiver_type_data_tag: |
| 941 | 628 return new ReceiverTypeData(this); |
| 0 | 629 case DataLayout::virtual_call_data_tag: |
| 941 | 630 return new VirtualCallData(this); |
| 0 | 631 case DataLayout::ret_data_tag: |
| 941 | 632 return new RetData(this); |
| 0 | 633 case DataLayout::branch_data_tag: |
| 941 | 634 return new BranchData(this); |
| 0 | 635 case DataLayout::multi_branch_data_tag: |
| 941 | 636 return new MultiBranchData(this); |
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637 case DataLayout::arg_info_data_tag: |
| 941 | 638 return new ArgInfoData(this); |
| 0 | 639 }; |
| 640 } | |
| 641 | |
| 642 // Iteration over data. | |
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643 ProfileData* MethodData::next_data(ProfileData* current) const { |
| 0 | 644 int current_index = dp_to_di(current->dp()); |
| 645 int next_index = current_index + current->size_in_bytes(); | |
| 646 ProfileData* next = data_at(next_index); | |
| 647 return next; | |
| 648 } | |
| 649 | |
| 650 // Give each of the data entries a chance to perform specific | |
| 651 // data initialization. | |
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652 void MethodData::post_initialize(BytecodeStream* stream) { |
| 0 | 653 ResourceMark rm; |
| 654 ProfileData* data; | |
| 655 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
| 656 stream->set_start(data->bci()); | |
| 657 stream->next(); | |
| 658 data->post_initialize(stream, this); | |
| 659 } | |
| 660 } | |
| 661 | |
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662 // Initialize the MethodData* corresponding to a given method. |
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663 MethodData::MethodData(methodHandle method, int size, TRAPS) { |
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664 No_Safepoint_Verifier no_safepoint; // init function atomic wrt GC |
| 0 | 665 ResourceMark rm; |
| 666 // Set the method back-pointer. | |
| 667 _method = method(); | |
| 1783 | 668 |
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669 init(); |
| 0 | 670 set_creation_mileage(mileage_of(method())); |
| 671 | |
| 672 // Go through the bytecodes and allocate and initialize the | |
| 673 // corresponding data cells. | |
| 674 int data_size = 0; | |
| 675 int empty_bc_count = 0; // number of bytecodes lacking data | |
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676 _data[0] = 0; // apparently not set below. |
| 0 | 677 BytecodeStream stream(method); |
| 678 Bytecodes::Code c; | |
| 679 while ((c = stream.next()) >= 0) { | |
| 680 int size_in_bytes = initialize_data(&stream, data_size); | |
| 681 data_size += size_in_bytes; | |
| 682 if (size_in_bytes == 0) empty_bc_count += 1; | |
| 683 } | |
| 684 _data_size = data_size; | |
| 685 int object_size = in_bytes(data_offset()) + data_size; | |
| 686 | |
| 687 // Add some extra DataLayout cells (at least one) to track stray traps. | |
| 688 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
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689 int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); |
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690 |
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691 // Add a cell to record information about modified arguments. |
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692 // Set up _args_modified array after traps cells so that |
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693 // the code for traps cells works. |
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694 DataLayout *dp = data_layout_at(data_size + extra_size); |
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695 |
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696 int arg_size = method->size_of_parameters(); |
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697 dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); |
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698 |
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699 object_size += extra_size + DataLayout::compute_size_in_bytes(arg_size+1); |
| 0 | 700 |
| 701 // Set an initial hint. Don't use set_hint_di() because | |
| 702 // first_di() may be out of bounds if data_size is 0. | |
| 703 // In that situation, _hint_di is never used, but at | |
| 704 // least well-defined. | |
| 705 _hint_di = first_di(); | |
| 706 | |
| 707 post_initialize(&stream); | |
| 708 | |
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709 set_size(object_size); |
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710 } |
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711 |
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712 void MethodData::init() { |
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713 _invocation_counter.init(); |
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714 _backedge_counter.init(); |
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715 _invocation_counter_start = 0; |
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716 _backedge_counter_start = 0; |
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717 _num_loops = 0; |
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718 _num_blocks = 0; |
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719 _highest_comp_level = 0; |
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720 _highest_osr_comp_level = 0; |
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721 _would_profile = true; |
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722 |
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723 // Initialize flags and trap history. |
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724 _nof_decompiles = 0; |
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725 _nof_overflow_recompiles = 0; |
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726 _nof_overflow_traps = 0; |
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727 clear_escape_info(); |
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728 assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); |
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729 Copy::zero_to_words((HeapWord*) &_trap_hist, |
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730 sizeof(_trap_hist) / sizeof(HeapWord)); |
| 0 | 731 } |
| 732 | |
| 733 // Get a measure of how much mileage the method has on it. | |
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734 int MethodData::mileage_of(Method* method) { |
| 0 | 735 int mileage = 0; |
| 1783 | 736 if (TieredCompilation) { |
| 737 mileage = MAX2(method->invocation_count(), method->backedge_count()); | |
| 738 } else { | |
| 739 int iic = method->interpreter_invocation_count(); | |
| 740 if (mileage < iic) mileage = iic; | |
|
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741 MethodCounters* mcs = method->method_counters(); |
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742 if (mcs != NULL) { |
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743 InvocationCounter* ic = mcs->invocation_counter(); |
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744 InvocationCounter* bc = mcs->backedge_counter(); |
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745 int icval = ic->count(); |
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746 if (ic->carry()) icval += CompileThreshold; |
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747 if (mileage < icval) mileage = icval; |
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748 int bcval = bc->count(); |
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749 if (bc->carry()) bcval += CompileThreshold; |
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750 if (mileage < bcval) mileage = bcval; |
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751 } |
| 1783 | 752 } |
| 0 | 753 return mileage; |
| 754 } | |
| 755 | |
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756 bool MethodData::is_mature() const { |
| 1783 | 757 return CompilationPolicy::policy()->is_mature(_method); |
| 0 | 758 } |
| 759 | |
| 760 // Translate a bci to its corresponding data index (di). | |
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761 address MethodData::bci_to_dp(int bci) { |
| 0 | 762 ResourceMark rm; |
| 763 ProfileData* data = data_before(bci); | |
| 764 ProfileData* prev = NULL; | |
| 765 for ( ; is_valid(data); data = next_data(data)) { | |
| 766 if (data->bci() >= bci) { | |
| 767 if (data->bci() == bci) set_hint_di(dp_to_di(data->dp())); | |
| 768 else if (prev != NULL) set_hint_di(dp_to_di(prev->dp())); | |
| 769 return data->dp(); | |
| 770 } | |
| 771 prev = data; | |
| 772 } | |
| 773 return (address)limit_data_position(); | |
| 774 } | |
| 775 | |
| 776 // Translate a bci to its corresponding data, or NULL. | |
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777 ProfileData* MethodData::bci_to_data(int bci) { |
| 0 | 778 ProfileData* data = data_before(bci); |
| 779 for ( ; is_valid(data); data = next_data(data)) { | |
| 780 if (data->bci() == bci) { | |
| 781 set_hint_di(dp_to_di(data->dp())); | |
| 782 return data; | |
| 783 } else if (data->bci() > bci) { | |
| 784 break; | |
| 785 } | |
| 786 } | |
| 787 return bci_to_extra_data(bci, false); | |
| 788 } | |
| 789 | |
| 790 // Translate a bci to its corresponding extra data, or NULL. | |
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791 ProfileData* MethodData::bci_to_extra_data(int bci, bool create_if_missing) { |
| 0 | 792 DataLayout* dp = extra_data_base(); |
| 793 DataLayout* end = extra_data_limit(); | |
| 794 DataLayout* avail = NULL; | |
| 795 for (; dp < end; dp = next_extra(dp)) { | |
| 796 // No need for "OrderAccess::load_acquire" ops, | |
| 797 // since the data structure is monotonic. | |
| 798 if (dp->tag() == DataLayout::no_tag) break; | |
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799 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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800 dp = end; // ArgInfoData is at the end of extra data section. |
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801 break; |
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802 } |
| 0 | 803 if (dp->bci() == bci) { |
| 804 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
| 805 return new BitData(dp); | |
| 806 } | |
| 807 } | |
| 808 if (create_if_missing && dp < end) { | |
| 809 // Allocate this one. There is no mutual exclusion, | |
| 810 // so two threads could allocate different BCIs to the | |
| 811 // same data layout. This means these extra data | |
| 812 // records, like most other MDO contents, must not be | |
| 813 // trusted too much. | |
| 814 DataLayout temp; | |
| 815 temp.initialize(DataLayout::bit_data_tag, bci, 0); | |
| 816 dp->release_set_header(temp.header()); | |
| 817 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
| 818 //NO: assert(dp->bci() == bci, "no concurrent allocation"); | |
| 819 return new BitData(dp); | |
| 820 } | |
| 821 return NULL; | |
| 822 } | |
| 823 | |
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824 ArgInfoData *MethodData::arg_info() { |
|
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825 DataLayout* dp = extra_data_base(); |
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826 DataLayout* end = extra_data_limit(); |
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827 for (; dp < end; dp = next_extra(dp)) { |
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828 if (dp->tag() == DataLayout::arg_info_data_tag) |
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829 return new ArgInfoData(dp); |
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830 } |
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831 return NULL; |
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832 } |
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833 |
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834 // Printing |
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835 |
| 0 | 836 #ifndef PRODUCT |
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837 |
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838 void MethodData::print_on(outputStream* st) const { |
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839 assert(is_methodData(), "should be method data"); |
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840 st->print("method data for "); |
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841 method()->print_value_on(st); |
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842 st->cr(); |
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843 print_data_on(st); |
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844 } |
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845 |
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846 #endif //PRODUCT |
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847 |
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848 void MethodData::print_value_on(outputStream* st) const { |
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849 assert(is_methodData(), "should be method data"); |
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850 st->print("method data for "); |
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851 method()->print_value_on(st); |
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852 } |
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853 |
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854 #ifndef PRODUCT |
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855 void MethodData::print_data_on(outputStream* st) const { |
| 0 | 856 ResourceMark rm; |
| 857 ProfileData* data = first_data(); | |
| 858 for ( ; is_valid(data); data = next_data(data)) { | |
| 859 st->print("%d", dp_to_di(data->dp())); | |
| 860 st->fill_to(6); | |
| 861 data->print_data_on(st); | |
| 862 } | |
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863 st->print_cr("--- Extra data:"); |
| 0 | 864 DataLayout* dp = extra_data_base(); |
| 865 DataLayout* end = extra_data_limit(); | |
| 866 for (; dp < end; dp = next_extra(dp)) { | |
| 867 // No need for "OrderAccess::load_acquire" ops, | |
| 868 // since the data structure is monotonic. | |
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869 if (dp->tag() == DataLayout::no_tag) continue; |
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870 if (dp->tag() == DataLayout::bit_data_tag) { |
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871 data = new BitData(dp); |
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872 } else { |
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873 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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874 data = new ArgInfoData(dp); |
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875 dp = end; // ArgInfoData is at the end of extra data section. |
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876 } |
| 0 | 877 st->print("%d", dp_to_di(data->dp())); |
| 878 st->fill_to(6); | |
| 879 data->print_data_on(st); | |
| 880 } | |
| 881 } | |
| 882 #endif | |
| 883 | |
| 7956 | 884 #if INCLUDE_SERVICES |
| 885 // Size Statistics | |
| 886 void MethodData::collect_statistics(KlassSizeStats *sz) const { | |
| 887 int n = sz->count(this); | |
| 888 sz->_method_data_bytes += n; | |
| 889 sz->_method_all_bytes += n; | |
| 890 sz->_rw_bytes += n; | |
| 891 } | |
| 892 #endif // INCLUDE_SERVICES | |
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893 |
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894 // Verification |
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895 |
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896 void MethodData::verify_on(outputStream* st) { |
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897 guarantee(is_methodData(), "object must be method data"); |
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898 // guarantee(m->is_perm(), "should be in permspace"); |
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899 this->verify_data_on(st); |
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900 } |
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901 |
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902 void MethodData::verify_data_on(outputStream* st) { |
| 0 | 903 NEEDS_CLEANUP; |
| 904 // not yet implemented. | |
| 905 } |