Mercurial > hg > graal-compiler
annotate src/share/vm/oops/methodData.hpp @ 9760:c76b43ed5089
Added infrastructure for recording invoked methods in the profiling information.
| author | Christian Haeubl <haeubl@ssw.jku.at> |
|---|---|
| date | Fri, 17 May 2013 15:38:22 +0200 |
| parents | 89e4d67fdd2a |
| children | 57e5211846f9 |
| 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 #ifndef SHARE_VM_OOPS_METHODDATAOOP_HPP |
| 26 #define SHARE_VM_OOPS_METHODDATAOOP_HPP | |
| 27 | |
| 28 #include "interpreter/bytecodes.hpp" | |
| 29 #include "memory/universe.hpp" | |
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30 #include "oops/method.hpp" |
| 1972 | 31 #include "oops/oop.hpp" |
| 32 #include "runtime/orderAccess.hpp" | |
| 33 | |
| 0 | 34 class BytecodeStream; |
| 7956 | 35 class KlassSizeStats; |
| 0 | 36 |
| 37 // The MethodData object collects counts and other profile information | |
| 38 // during zeroth-tier (interpretive) and first-tier execution. | |
| 39 // The profile is used later by compilation heuristics. Some heuristics | |
| 40 // enable use of aggressive (or "heroic") optimizations. An aggressive | |
| 41 // optimization often has a down-side, a corner case that it handles | |
| 42 // poorly, but which is thought to be rare. The profile provides | |
| 43 // evidence of this rarity for a given method or even BCI. It allows | |
| 44 // the compiler to back out of the optimization at places where it | |
| 45 // has historically been a poor choice. Other heuristics try to use | |
| 46 // specific information gathered about types observed at a given site. | |
| 47 // | |
| 48 // All data in the profile is approximate. It is expected to be accurate | |
| 49 // on the whole, but the system expects occasional inaccuraces, due to | |
| 50 // counter overflow, multiprocessor races during data collection, space | |
| 51 // limitations, missing MDO blocks, etc. Bad or missing data will degrade | |
| 52 // optimization quality but will not affect correctness. Also, each MDO | |
| 53 // is marked with its birth-date ("creation_mileage") which can be used | |
| 54 // to assess the quality ("maturity") of its data. | |
| 55 // | |
| 56 // Short (<32-bit) counters are designed to overflow to a known "saturated" | |
| 57 // state. Also, certain recorded per-BCI events are given one-bit counters | |
| 58 // which overflow to a saturated state which applied to all counters at | |
| 59 // that BCI. In other words, there is a small lattice which approximates | |
| 60 // the ideal of an infinite-precision counter for each event at each BCI, | |
| 61 // and the lattice quickly "bottoms out" in a state where all counters | |
| 62 // are taken to be indefinitely large. | |
| 63 // | |
| 64 // The reader will find many data races in profile gathering code, starting | |
| 65 // with invocation counter incrementation. None of these races harm correct | |
| 66 // execution of the compiled code. | |
| 67 | |
| 941 | 68 // forward decl |
| 69 class ProfileData; | |
| 70 | |
| 0 | 71 // DataLayout |
| 72 // | |
| 73 // Overlay for generic profiling data. | |
| 74 class DataLayout VALUE_OBJ_CLASS_SPEC { | |
| 75 private: | |
| 76 // Every data layout begins with a header. This header | |
| 77 // contains a tag, which is used to indicate the size/layout | |
| 78 // of the data, 4 bits of flags, which can be used in any way, | |
| 79 // 4 bits of trap history (none/one reason/many reasons), | |
| 80 // and a bci, which is used to tie this piece of data to a | |
| 81 // specific bci in the bytecodes. | |
| 82 union { | |
| 83 intptr_t _bits; | |
| 84 struct { | |
| 85 u1 _tag; | |
| 86 u1 _flags; | |
| 87 u2 _bci; | |
| 88 } _struct; | |
| 89 } _header; | |
| 90 | |
| 91 // The data layout has an arbitrary number of cells, each sized | |
| 92 // to accomodate a pointer or an integer. | |
| 93 intptr_t _cells[1]; | |
| 94 | |
| 95 // Some types of data layouts need a length field. | |
| 96 static bool needs_array_len(u1 tag); | |
| 97 | |
| 98 public: | |
| 99 enum { | |
| 100 counter_increment = 1 | |
| 101 }; | |
| 102 | |
| 103 enum { | |
| 104 cell_size = sizeof(intptr_t) | |
| 105 }; | |
| 106 | |
| 107 // Tag values | |
| 108 enum { | |
| 109 no_tag, | |
| 110 bit_data_tag, | |
| 111 counter_data_tag, | |
| 112 jump_data_tag, | |
| 113 receiver_type_data_tag, | |
| 114 virtual_call_data_tag, | |
| 115 ret_data_tag, | |
| 116 branch_data_tag, | |
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117 multi_branch_data_tag, |
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118 arg_info_data_tag |
| 0 | 119 }; |
| 120 | |
| 121 enum { | |
| 122 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
| 123 // The trap state breaks down further as [recompile:1 | reason:3]. | |
| 124 // This further breakdown is defined in deoptimization.cpp. | |
| 125 // See Deoptimization::trap_state_reason for an assert that | |
| 126 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
| 127 // | |
| 128 // The trap_state is collected only if ProfileTraps is true. | |
| 129 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
| 130 trap_shift = BitsPerByte - trap_bits, | |
| 131 trap_mask = right_n_bits(trap_bits), | |
| 132 trap_mask_in_place = (trap_mask << trap_shift), | |
| 133 flag_limit = trap_shift, | |
| 134 flag_mask = right_n_bits(flag_limit), | |
| 135 first_flag = 0 | |
| 136 }; | |
| 137 | |
| 138 // Size computation | |
| 139 static int header_size_in_bytes() { | |
| 140 return cell_size; | |
| 141 } | |
| 142 static int header_size_in_cells() { | |
| 143 return 1; | |
| 144 } | |
| 145 | |
| 146 static int compute_size_in_bytes(int cell_count) { | |
| 147 return header_size_in_bytes() + cell_count * cell_size; | |
| 148 } | |
| 149 | |
| 150 // Initialization | |
| 151 void initialize(u1 tag, u2 bci, int cell_count); | |
| 152 | |
| 153 // Accessors | |
| 154 u1 tag() { | |
| 155 return _header._struct._tag; | |
| 156 } | |
| 157 | |
| 158 // Return a few bits of trap state. Range is [0..trap_mask]. | |
| 159 // The state tells if traps with zero, one, or many reasons have occurred. | |
| 160 // It also tells whether zero or many recompilations have occurred. | |
| 161 // The associated trap histogram in the MDO itself tells whether | |
| 162 // traps are common or not. If a BCI shows that a trap X has | |
| 163 // occurred, and the MDO shows N occurrences of X, we make the | |
| 164 // simplifying assumption that all N occurrences can be blamed | |
| 165 // on that BCI. | |
| 166 int trap_state() { | |
| 167 return ((_header._struct._flags >> trap_shift) & trap_mask); | |
| 168 } | |
| 169 | |
| 170 void set_trap_state(int new_state) { | |
| 171 assert(ProfileTraps, "used only under +ProfileTraps"); | |
| 172 uint old_flags = (_header._struct._flags & flag_mask); | |
| 173 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
| 174 } | |
| 175 | |
| 176 u1 flags() { | |
| 177 return _header._struct._flags; | |
| 178 } | |
| 179 | |
| 180 u2 bci() { | |
| 181 return _header._struct._bci; | |
| 182 } | |
| 183 | |
| 184 void set_header(intptr_t value) { | |
| 185 _header._bits = value; | |
| 186 } | |
| 187 void release_set_header(intptr_t value) { | |
| 188 OrderAccess::release_store_ptr(&_header._bits, value); | |
| 189 } | |
| 190 intptr_t header() { | |
| 191 return _header._bits; | |
| 192 } | |
| 193 void set_cell_at(int index, intptr_t value) { | |
| 194 _cells[index] = value; | |
| 195 } | |
| 196 void release_set_cell_at(int index, intptr_t value) { | |
| 197 OrderAccess::release_store_ptr(&_cells[index], value); | |
| 198 } | |
| 199 intptr_t cell_at(int index) { | |
| 200 return _cells[index]; | |
| 201 } | |
| 202 | |
| 203 void set_flag_at(int flag_number) { | |
| 204 assert(flag_number < flag_limit, "oob"); | |
| 205 _header._struct._flags |= (0x1 << flag_number); | |
| 206 } | |
| 207 bool flag_at(int flag_number) { | |
| 208 assert(flag_number < flag_limit, "oob"); | |
| 209 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
| 210 } | |
| 211 | |
| 212 // Low-level support for code generation. | |
| 213 static ByteSize header_offset() { | |
| 214 return byte_offset_of(DataLayout, _header); | |
| 215 } | |
| 216 static ByteSize tag_offset() { | |
| 217 return byte_offset_of(DataLayout, _header._struct._tag); | |
| 218 } | |
| 219 static ByteSize flags_offset() { | |
| 220 return byte_offset_of(DataLayout, _header._struct._flags); | |
| 221 } | |
| 222 static ByteSize bci_offset() { | |
| 223 return byte_offset_of(DataLayout, _header._struct._bci); | |
| 224 } | |
| 225 static ByteSize cell_offset(int index) { | |
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226 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
| 0 | 227 } |
| 228 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
| 229 static int flag_number_to_byte_constant(int flag_number) { | |
| 230 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
| 231 DataLayout temp; temp.set_header(0); | |
| 232 temp.set_flag_at(flag_number); | |
| 233 return temp._header._struct._flags; | |
| 234 } | |
| 235 // Return a value which, when or-ed as a word into _header, sets the flag. | |
| 236 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
| 237 DataLayout temp; temp.set_header(0); | |
| 238 temp._header._struct._flags = byte_constant; | |
| 239 return temp._header._bits; | |
| 240 } | |
| 941 | 241 |
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242 ProfileData* data_in(); |
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243 |
| 941 | 244 // GC support |
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245 void clean_weak_klass_links(BoolObjectClosure* cl); |
| 0 | 246 }; |
| 247 | |
| 248 | |
| 249 // ProfileData class hierarchy | |
| 250 class ProfileData; | |
| 251 class BitData; | |
| 252 class CounterData; | |
| 253 class ReceiverTypeData; | |
| 254 class VirtualCallData; | |
| 255 class RetData; | |
| 256 class JumpData; | |
| 257 class BranchData; | |
| 258 class ArrayData; | |
| 259 class MultiBranchData; | |
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260 class ArgInfoData; |
| 0 | 261 |
| 262 | |
| 263 // ProfileData | |
| 264 // | |
| 265 // A ProfileData object is created to refer to a section of profiling | |
| 266 // data in a structured way. | |
| 267 class ProfileData : public ResourceObj { | |
| 268 private: | |
| 269 #ifndef PRODUCT | |
| 270 enum { | |
| 271 tab_width_one = 16, | |
| 272 tab_width_two = 36 | |
| 273 }; | |
| 274 #endif // !PRODUCT | |
| 275 | |
| 276 // This is a pointer to a section of profiling data. | |
| 277 DataLayout* _data; | |
| 278 | |
| 279 protected: | |
| 280 DataLayout* data() { return _data; } | |
| 281 | |
| 282 enum { | |
| 283 cell_size = DataLayout::cell_size | |
| 284 }; | |
| 285 | |
| 286 public: | |
| 287 // How many cells are in this? | |
| 288 virtual int cell_count() { | |
| 289 ShouldNotReachHere(); | |
| 290 return -1; | |
| 291 } | |
| 292 | |
| 293 // Return the size of this data. | |
| 294 int size_in_bytes() { | |
| 295 return DataLayout::compute_size_in_bytes(cell_count()); | |
| 296 } | |
| 297 | |
| 298 protected: | |
| 299 // Low-level accessors for underlying data | |
| 300 void set_intptr_at(int index, intptr_t value) { | |
| 301 assert(0 <= index && index < cell_count(), "oob"); | |
| 302 data()->set_cell_at(index, value); | |
| 303 } | |
| 304 void release_set_intptr_at(int index, intptr_t value) { | |
| 305 assert(0 <= index && index < cell_count(), "oob"); | |
| 306 data()->release_set_cell_at(index, value); | |
| 307 } | |
| 308 intptr_t intptr_at(int index) { | |
| 309 assert(0 <= index && index < cell_count(), "oob"); | |
| 310 return data()->cell_at(index); | |
| 311 } | |
| 312 void set_uint_at(int index, uint value) { | |
| 313 set_intptr_at(index, (intptr_t) value); | |
| 314 } | |
| 315 void release_set_uint_at(int index, uint value) { | |
| 316 release_set_intptr_at(index, (intptr_t) value); | |
| 317 } | |
| 318 uint uint_at(int index) { | |
| 319 return (uint)intptr_at(index); | |
| 320 } | |
| 321 void set_int_at(int index, int value) { | |
| 322 set_intptr_at(index, (intptr_t) value); | |
| 323 } | |
| 324 void release_set_int_at(int index, int value) { | |
| 325 release_set_intptr_at(index, (intptr_t) value); | |
| 326 } | |
| 327 int int_at(int index) { | |
| 328 return (int)intptr_at(index); | |
| 329 } | |
| 330 int int_at_unchecked(int index) { | |
| 331 return (int)data()->cell_at(index); | |
| 332 } | |
| 333 void set_oop_at(int index, oop value) { | |
| 334 set_intptr_at(index, (intptr_t) value); | |
| 335 } | |
| 336 oop oop_at(int index) { | |
| 337 return (oop)intptr_at(index); | |
| 338 } | |
| 339 | |
| 340 void set_flag_at(int flag_number) { | |
| 341 data()->set_flag_at(flag_number); | |
| 342 } | |
| 343 bool flag_at(int flag_number) { | |
| 344 return data()->flag_at(flag_number); | |
| 345 } | |
| 346 | |
| 347 // two convenient imports for use by subclasses: | |
| 348 static ByteSize cell_offset(int index) { | |
| 349 return DataLayout::cell_offset(index); | |
| 350 } | |
| 351 static int flag_number_to_byte_constant(int flag_number) { | |
| 352 return DataLayout::flag_number_to_byte_constant(flag_number); | |
| 353 } | |
| 354 | |
| 355 ProfileData(DataLayout* data) { | |
| 356 _data = data; | |
| 357 } | |
| 358 | |
| 359 public: | |
| 360 // Constructor for invalid ProfileData. | |
| 361 ProfileData(); | |
| 362 | |
| 363 u2 bci() { | |
| 364 return data()->bci(); | |
| 365 } | |
| 366 | |
| 367 address dp() { | |
| 368 return (address)_data; | |
| 369 } | |
| 370 | |
| 371 int trap_state() { | |
| 372 return data()->trap_state(); | |
| 373 } | |
| 374 void set_trap_state(int new_state) { | |
| 375 data()->set_trap_state(new_state); | |
| 376 } | |
| 377 | |
| 378 // Type checking | |
| 379 virtual bool is_BitData() { return false; } | |
| 380 virtual bool is_CounterData() { return false; } | |
| 381 virtual bool is_JumpData() { return false; } | |
| 382 virtual bool is_ReceiverTypeData(){ return false; } | |
| 383 virtual bool is_VirtualCallData() { return false; } | |
| 384 virtual bool is_RetData() { return false; } | |
| 385 virtual bool is_BranchData() { return false; } | |
| 386 virtual bool is_ArrayData() { return false; } | |
| 387 virtual bool is_MultiBranchData() { return false; } | |
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388 virtual bool is_ArgInfoData() { return false; } |
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389 |
| 0 | 390 |
| 391 BitData* as_BitData() { | |
| 392 assert(is_BitData(), "wrong type"); | |
| 393 return is_BitData() ? (BitData*) this : NULL; | |
| 394 } | |
| 395 CounterData* as_CounterData() { | |
| 396 assert(is_CounterData(), "wrong type"); | |
| 397 return is_CounterData() ? (CounterData*) this : NULL; | |
| 398 } | |
| 399 JumpData* as_JumpData() { | |
| 400 assert(is_JumpData(), "wrong type"); | |
| 401 return is_JumpData() ? (JumpData*) this : NULL; | |
| 402 } | |
| 403 ReceiverTypeData* as_ReceiverTypeData() { | |
| 404 assert(is_ReceiverTypeData(), "wrong type"); | |
| 405 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
| 406 } | |
| 407 VirtualCallData* as_VirtualCallData() { | |
| 408 assert(is_VirtualCallData(), "wrong type"); | |
| 409 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
| 410 } | |
| 411 RetData* as_RetData() { | |
| 412 assert(is_RetData(), "wrong type"); | |
| 413 return is_RetData() ? (RetData*) this : NULL; | |
| 414 } | |
| 415 BranchData* as_BranchData() { | |
| 416 assert(is_BranchData(), "wrong type"); | |
| 417 return is_BranchData() ? (BranchData*) this : NULL; | |
| 418 } | |
| 419 ArrayData* as_ArrayData() { | |
| 420 assert(is_ArrayData(), "wrong type"); | |
| 421 return is_ArrayData() ? (ArrayData*) this : NULL; | |
| 422 } | |
| 423 MultiBranchData* as_MultiBranchData() { | |
| 424 assert(is_MultiBranchData(), "wrong type"); | |
| 425 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
| 426 } | |
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427 ArgInfoData* as_ArgInfoData() { |
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428 assert(is_ArgInfoData(), "wrong type"); |
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429 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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430 } |
| 0 | 431 |
| 432 | |
| 433 // Subclass specific initialization | |
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434 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
| 0 | 435 |
| 436 // GC support | |
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437 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
| 0 | 438 |
| 439 // CI translation: ProfileData can represent both MethodDataOop data | |
| 440 // as well as CIMethodData data. This function is provided for translating | |
| 441 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
| 442 // most ProfileData don't require any translation, so we provide the null | |
| 443 // translation here, and the required translators are in the ci subclasses. | |
| 444 virtual void translate_from(ProfileData* data) {} | |
| 445 | |
| 446 virtual void print_data_on(outputStream* st) { | |
| 447 ShouldNotReachHere(); | |
| 448 } | |
| 449 | |
| 450 #ifndef PRODUCT | |
| 451 void print_shared(outputStream* st, const char* name); | |
| 452 void tab(outputStream* st); | |
| 453 #endif | |
| 454 }; | |
| 455 | |
| 456 // BitData | |
| 457 // | |
| 458 // A BitData holds a flag or two in its header. | |
| 459 class BitData : public ProfileData { | |
| 460 protected: | |
| 461 enum { | |
| 462 // null_seen: | |
| 463 // saw a null operand (cast/aastore/instanceof) | |
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464 null_seen_flag = DataLayout::first_flag + 0 |
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465 #ifdef GRAAL |
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466 // bytecode threw any exception |
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467 , exception_seen_flag = null_seen_flag + 1 |
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468 #endif |
| 0 | 469 }; |
| 470 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
| 471 public: | |
| 472 BitData(DataLayout* layout) : ProfileData(layout) { | |
| 473 } | |
| 474 | |
| 475 virtual bool is_BitData() { return true; } | |
| 476 | |
| 477 static int static_cell_count() { | |
| 478 return bit_cell_count; | |
| 479 } | |
| 480 | |
| 481 virtual int cell_count() { | |
| 482 return static_cell_count(); | |
| 483 } | |
| 484 | |
| 485 // Accessor | |
| 486 | |
| 487 // The null_seen flag bit is specially known to the interpreter. | |
| 488 // Consulting it allows the compiler to avoid setting up null_check traps. | |
| 489 bool null_seen() { return flag_at(null_seen_flag); } | |
| 490 void set_null_seen() { set_flag_at(null_seen_flag); } | |
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491 #ifdef GRAAL |
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492 // true if an exception was thrown at the specific BCI |
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493 bool exception_seen() { return flag_at(exception_seen_flag); } |
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494 void set_exception_seen() { set_flag_at(exception_seen_flag); } |
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495 #endif |
| 0 | 496 |
| 497 // Code generation support | |
| 498 static int null_seen_byte_constant() { | |
| 499 return flag_number_to_byte_constant(null_seen_flag); | |
| 500 } | |
| 501 | |
| 502 static ByteSize bit_data_size() { | |
| 503 return cell_offset(bit_cell_count); | |
| 504 } | |
| 505 | |
| 506 #ifndef PRODUCT | |
| 507 void print_data_on(outputStream* st); | |
| 508 #endif | |
| 509 }; | |
| 510 | |
| 511 // CounterData | |
| 512 // | |
| 513 // A CounterData corresponds to a simple counter. | |
| 514 class CounterData : public BitData { | |
| 515 protected: | |
| 516 enum { | |
| 517 count_off, | |
| 518 counter_cell_count | |
| 519 }; | |
| 520 public: | |
| 521 CounterData(DataLayout* layout) : BitData(layout) {} | |
| 522 | |
| 523 virtual bool is_CounterData() { return true; } | |
| 524 | |
| 525 static int static_cell_count() { | |
| 526 return counter_cell_count; | |
| 527 } | |
| 528 | |
| 529 virtual int cell_count() { | |
| 530 return static_cell_count(); | |
| 531 } | |
| 532 | |
| 533 // Direct accessor | |
| 534 uint count() { | |
| 535 return uint_at(count_off); | |
| 536 } | |
| 537 | |
| 538 // Code generation support | |
| 539 static ByteSize count_offset() { | |
| 540 return cell_offset(count_off); | |
| 541 } | |
| 542 static ByteSize counter_data_size() { | |
| 543 return cell_offset(counter_cell_count); | |
| 544 } | |
| 545 | |
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546 void set_count(uint count) { |
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547 set_uint_at(count_off, count); |
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548 } |
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549 |
| 0 | 550 #ifndef PRODUCT |
| 551 void print_data_on(outputStream* st); | |
| 552 #endif | |
| 553 }; | |
| 554 | |
| 555 // JumpData | |
| 556 // | |
| 557 // A JumpData is used to access profiling information for a direct | |
| 558 // branch. It is a counter, used for counting the number of branches, | |
| 559 // plus a data displacement, used for realigning the data pointer to | |
| 560 // the corresponding target bci. | |
| 561 class JumpData : public ProfileData { | |
| 562 protected: | |
| 563 enum { | |
| 564 taken_off_set, | |
| 565 displacement_off_set, | |
| 566 jump_cell_count | |
| 567 }; | |
| 568 | |
| 569 void set_displacement(int displacement) { | |
| 570 set_int_at(displacement_off_set, displacement); | |
| 571 } | |
| 572 | |
| 573 public: | |
| 574 JumpData(DataLayout* layout) : ProfileData(layout) { | |
| 575 assert(layout->tag() == DataLayout::jump_data_tag || | |
| 576 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
| 577 } | |
| 578 | |
| 579 virtual bool is_JumpData() { return true; } | |
| 580 | |
| 581 static int static_cell_count() { | |
| 582 return jump_cell_count; | |
| 583 } | |
| 584 | |
| 585 virtual int cell_count() { | |
| 586 return static_cell_count(); | |
| 587 } | |
| 588 | |
| 589 // Direct accessor | |
| 590 uint taken() { | |
| 591 return uint_at(taken_off_set); | |
| 592 } | |
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593 |
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594 void set_taken(uint cnt) { |
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595 set_uint_at(taken_off_set, cnt); |
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596 } |
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597 |
| 0 | 598 // Saturating counter |
| 599 uint inc_taken() { | |
| 600 uint cnt = taken() + 1; | |
| 601 // Did we wrap? Will compiler screw us?? | |
| 602 if (cnt == 0) cnt--; | |
| 603 set_uint_at(taken_off_set, cnt); | |
| 604 return cnt; | |
| 605 } | |
| 606 | |
| 607 int displacement() { | |
| 608 return int_at(displacement_off_set); | |
| 609 } | |
| 610 | |
| 611 // Code generation support | |
| 612 static ByteSize taken_offset() { | |
| 613 return cell_offset(taken_off_set); | |
| 614 } | |
| 615 | |
| 616 static ByteSize displacement_offset() { | |
| 617 return cell_offset(displacement_off_set); | |
| 618 } | |
| 619 | |
| 620 // Specific initialization. | |
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621 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 622 |
| 623 #ifndef PRODUCT | |
| 624 void print_data_on(outputStream* st); | |
| 625 #endif | |
| 626 }; | |
| 627 | |
| 628 // ReceiverTypeData | |
| 629 // | |
| 630 // A ReceiverTypeData is used to access profiling information about a | |
| 631 // dynamic type check. It consists of a counter which counts the total times | |
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632 // that the check is reached, and a series of (Klass*, count) pairs |
| 0 | 633 // which are used to store a type profile for the receiver of the check. |
| 634 class ReceiverTypeData : public CounterData { | |
| 635 protected: | |
| 636 enum { | |
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637 #ifdef GRAAL |
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638 // Graal is interested in knowing the percentage of type checks |
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639 // involving a type not explicitly in the profile |
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640 nonprofiled_receiver_count_off_set = counter_cell_count, |
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641 receiver0_offset, |
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642 #else |
| 0 | 643 receiver0_offset = counter_cell_count, |
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644 #endif |
| 0 | 645 count0_offset, |
| 646 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
| 647 }; | |
| 648 | |
| 649 public: | |
| 650 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
| 651 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
| 652 layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
| 653 } | |
| 654 | |
| 655 virtual bool is_ReceiverTypeData() { return true; } | |
| 656 | |
| 657 static int static_cell_count() { | |
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658 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count GRAAL_ONLY(+ 1); |
| 0 | 659 } |
| 660 | |
| 661 virtual int cell_count() { | |
| 662 return static_cell_count(); | |
| 663 } | |
| 664 | |
| 665 // Direct accessors | |
| 666 static uint row_limit() { | |
| 667 return TypeProfileWidth; | |
| 668 } | |
| 669 static int receiver_cell_index(uint row) { | |
| 670 return receiver0_offset + row * receiver_type_row_cell_count; | |
| 671 } | |
| 672 static int receiver_count_cell_index(uint row) { | |
| 673 return count0_offset + row * receiver_type_row_cell_count; | |
| 674 } | |
| 675 | |
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676 Klass* receiver(uint row) { |
| 0 | 677 assert(row < row_limit(), "oob"); |
| 678 | |
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679 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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680 assert(recv == NULL || recv->is_klass(), "wrong type"); |
| 0 | 681 return recv; |
| 682 } | |
| 683 | |
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684 void set_receiver(uint row, Klass* k) { |
| 941 | 685 assert((uint)row < row_limit(), "oob"); |
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686 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
| 941 | 687 } |
| 688 | |
| 0 | 689 uint receiver_count(uint row) { |
| 690 assert(row < row_limit(), "oob"); | |
| 691 return uint_at(receiver_count_cell_index(row)); | |
| 692 } | |
| 693 | |
| 941 | 694 void set_receiver_count(uint row, uint count) { |
| 695 assert(row < row_limit(), "oob"); | |
| 696 set_uint_at(receiver_count_cell_index(row), count); | |
| 697 } | |
| 698 | |
| 699 void clear_row(uint row) { | |
| 700 assert(row < row_limit(), "oob"); | |
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701 // Clear total count - indicator of polymorphic call site. |
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702 // The site may look like as monomorphic after that but |
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703 // it allow to have more accurate profiling information because |
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704 // there was execution phase change since klasses were unloaded. |
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705 // If the site is still polymorphic then MDO will be updated |
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706 // to reflect it. But it could be the case that the site becomes |
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707 // only bimorphic. Then keeping total count not 0 will be wrong. |
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708 // Even if we use monomorphic (when it is not) for compilation |
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709 // we will only have trap, deoptimization and recompile again |
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710 // with updated MDO after executing method in Interpreter. |
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711 // An additional receiver will be recorded in the cleaned row |
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712 // during next call execution. |
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713 // |
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714 // Note: our profiling logic works with empty rows in any slot. |
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715 // We do sorting a profiling info (ciCallProfile) for compilation. |
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716 // |
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717 set_count(0); |
| 941 | 718 set_receiver(row, NULL); |
| 719 set_receiver_count(row, 0); | |
| 720 } | |
| 721 | |
| 0 | 722 // Code generation support |
| 723 static ByteSize receiver_offset(uint row) { | |
| 724 return cell_offset(receiver_cell_index(row)); | |
| 725 } | |
| 726 static ByteSize receiver_count_offset(uint row) { | |
| 727 return cell_offset(receiver_count_cell_index(row)); | |
| 728 } | |
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729 #ifdef GRAAL |
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730 static ByteSize nonprofiled_receiver_count_offset() { |
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731 return cell_offset(nonprofiled_receiver_count_off_set); |
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732 } |
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733 #endif |
| 0 | 734 static ByteSize receiver_type_data_size() { |
| 735 return cell_offset(static_cell_count()); | |
| 736 } | |
| 737 | |
| 738 // GC support | |
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739 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
| 0 | 740 |
| 741 #ifndef PRODUCT | |
| 742 void print_receiver_data_on(outputStream* st); | |
| 743 void print_data_on(outputStream* st); | |
| 744 #endif | |
| 745 }; | |
| 746 | |
| 747 // VirtualCallData | |
| 748 // | |
| 749 // A VirtualCallData is used to access profiling information about a | |
| 750 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
| 751 class VirtualCallData : public ReceiverTypeData { | |
| 752 public: | |
| 753 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
| 754 assert(layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
| 755 } | |
| 756 | |
| 757 virtual bool is_VirtualCallData() { return true; } | |
| 758 | |
| 759 static int static_cell_count() { | |
| 760 // At this point we could add more profile state, e.g., for arguments. | |
| 761 // But for now it's the same size as the base record type. | |
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762 return ReceiverTypeData::static_cell_count() GRAAL_ONLY(+ (uint) MethodProfileWidth * receiver_type_row_cell_count); |
| 0 | 763 } |
| 764 | |
| 765 virtual int cell_count() { | |
| 766 return static_cell_count(); | |
| 767 } | |
| 768 | |
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769 #ifdef GRAAL |
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770 static ByteSize method_offset(uint row) { |
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771 return cell_offset(method_cell_index(row)); |
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772 } |
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773 static ByteSize method_count_offset(uint row) { |
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774 return cell_offset(method_count_cell_index(row)); |
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775 } |
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776 static int method_cell_index(uint row) { |
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777 return receiver0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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778 } |
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779 static int method_count_cell_index(uint row) { |
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780 return count0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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781 } |
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782 #endif |
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783 |
| 0 | 784 // Direct accessors |
| 785 static ByteSize virtual_call_data_size() { | |
| 786 return cell_offset(static_cell_count()); | |
| 787 } | |
| 788 | |
| 789 #ifndef PRODUCT | |
| 790 void print_data_on(outputStream* st); | |
| 791 #endif | |
| 792 }; | |
| 793 | |
| 794 // RetData | |
| 795 // | |
| 796 // A RetData is used to access profiling information for a ret bytecode. | |
| 797 // It is composed of a count of the number of times that the ret has | |
| 798 // been executed, followed by a series of triples of the form | |
| 799 // (bci, count, di) which count the number of times that some bci was the | |
| 800 // target of the ret and cache a corresponding data displacement. | |
| 801 class RetData : public CounterData { | |
| 802 protected: | |
| 803 enum { | |
| 804 bci0_offset = counter_cell_count, | |
| 805 count0_offset, | |
| 806 displacement0_offset, | |
| 807 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
| 808 }; | |
| 809 | |
| 810 void set_bci(uint row, int bci) { | |
| 811 assert((uint)row < row_limit(), "oob"); | |
| 812 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
| 813 } | |
| 814 void release_set_bci(uint row, int bci) { | |
| 815 assert((uint)row < row_limit(), "oob"); | |
| 816 // 'release' when setting the bci acts as a valid flag for other | |
| 817 // threads wrt bci_count and bci_displacement. | |
| 818 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
| 819 } | |
| 820 void set_bci_count(uint row, uint count) { | |
| 821 assert((uint)row < row_limit(), "oob"); | |
| 822 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
| 823 } | |
| 824 void set_bci_displacement(uint row, int disp) { | |
| 825 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
| 826 } | |
| 827 | |
| 828 public: | |
| 829 RetData(DataLayout* layout) : CounterData(layout) { | |
| 830 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
| 831 } | |
| 832 | |
| 833 virtual bool is_RetData() { return true; } | |
| 834 | |
| 835 enum { | |
| 836 no_bci = -1 // value of bci when bci1/2 are not in use. | |
| 837 }; | |
| 838 | |
| 839 static int static_cell_count() { | |
| 840 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
| 841 } | |
| 842 | |
| 843 virtual int cell_count() { | |
| 844 return static_cell_count(); | |
| 845 } | |
| 846 | |
| 847 static uint row_limit() { | |
| 848 return BciProfileWidth; | |
| 849 } | |
| 850 static int bci_cell_index(uint row) { | |
| 851 return bci0_offset + row * ret_row_cell_count; | |
| 852 } | |
| 853 static int bci_count_cell_index(uint row) { | |
| 854 return count0_offset + row * ret_row_cell_count; | |
| 855 } | |
| 856 static int bci_displacement_cell_index(uint row) { | |
| 857 return displacement0_offset + row * ret_row_cell_count; | |
| 858 } | |
| 859 | |
| 860 // Direct accessors | |
| 861 int bci(uint row) { | |
| 862 return int_at(bci_cell_index(row)); | |
| 863 } | |
| 864 uint bci_count(uint row) { | |
| 865 return uint_at(bci_count_cell_index(row)); | |
| 866 } | |
| 867 int bci_displacement(uint row) { | |
| 868 return int_at(bci_displacement_cell_index(row)); | |
| 869 } | |
| 870 | |
| 871 // Interpreter Runtime support | |
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872 address fixup_ret(int return_bci, MethodData* mdo); |
| 0 | 873 |
| 874 // Code generation support | |
| 875 static ByteSize bci_offset(uint row) { | |
| 876 return cell_offset(bci_cell_index(row)); | |
| 877 } | |
| 878 static ByteSize bci_count_offset(uint row) { | |
| 879 return cell_offset(bci_count_cell_index(row)); | |
| 880 } | |
| 881 static ByteSize bci_displacement_offset(uint row) { | |
| 882 return cell_offset(bci_displacement_cell_index(row)); | |
| 883 } | |
| 884 | |
| 885 // Specific initialization. | |
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886 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 887 |
| 888 #ifndef PRODUCT | |
| 889 void print_data_on(outputStream* st); | |
| 890 #endif | |
| 891 }; | |
| 892 | |
| 893 // BranchData | |
| 894 // | |
| 895 // A BranchData is used to access profiling data for a two-way branch. | |
| 896 // It consists of taken and not_taken counts as well as a data displacement | |
| 897 // for the taken case. | |
| 898 class BranchData : public JumpData { | |
| 899 protected: | |
| 900 enum { | |
| 901 not_taken_off_set = jump_cell_count, | |
| 902 branch_cell_count | |
| 903 }; | |
| 904 | |
| 905 void set_displacement(int displacement) { | |
| 906 set_int_at(displacement_off_set, displacement); | |
| 907 } | |
| 908 | |
| 909 public: | |
| 910 BranchData(DataLayout* layout) : JumpData(layout) { | |
| 911 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
| 912 } | |
| 913 | |
| 914 virtual bool is_BranchData() { return true; } | |
| 915 | |
| 916 static int static_cell_count() { | |
| 917 return branch_cell_count; | |
| 918 } | |
| 919 | |
| 920 virtual int cell_count() { | |
| 921 return static_cell_count(); | |
| 922 } | |
| 923 | |
| 924 // Direct accessor | |
| 925 uint not_taken() { | |
| 926 return uint_at(not_taken_off_set); | |
| 927 } | |
| 928 | |
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929 void set_not_taken(uint cnt) { |
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930 set_uint_at(not_taken_off_set, cnt); |
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931 } |
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932 |
| 0 | 933 uint inc_not_taken() { |
| 934 uint cnt = not_taken() + 1; | |
| 935 // Did we wrap? Will compiler screw us?? | |
| 936 if (cnt == 0) cnt--; | |
| 937 set_uint_at(not_taken_off_set, cnt); | |
| 938 return cnt; | |
| 939 } | |
| 940 | |
| 941 // Code generation support | |
| 942 static ByteSize not_taken_offset() { | |
| 943 return cell_offset(not_taken_off_set); | |
| 944 } | |
| 945 static ByteSize branch_data_size() { | |
| 946 return cell_offset(branch_cell_count); | |
| 947 } | |
| 948 | |
| 949 // Specific initialization. | |
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950 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 951 |
| 952 #ifndef PRODUCT | |
| 953 void print_data_on(outputStream* st); | |
| 954 #endif | |
| 955 }; | |
| 956 | |
| 957 // ArrayData | |
| 958 // | |
| 959 // A ArrayData is a base class for accessing profiling data which does | |
| 960 // not have a statically known size. It consists of an array length | |
| 961 // and an array start. | |
| 962 class ArrayData : public ProfileData { | |
| 963 protected: | |
| 964 friend class DataLayout; | |
| 965 | |
| 966 enum { | |
| 967 array_len_off_set, | |
| 968 array_start_off_set | |
| 969 }; | |
| 970 | |
| 971 uint array_uint_at(int index) { | |
| 972 int aindex = index + array_start_off_set; | |
| 973 return uint_at(aindex); | |
| 974 } | |
| 975 int array_int_at(int index) { | |
| 976 int aindex = index + array_start_off_set; | |
| 977 return int_at(aindex); | |
| 978 } | |
| 979 oop array_oop_at(int index) { | |
| 980 int aindex = index + array_start_off_set; | |
| 981 return oop_at(aindex); | |
| 982 } | |
| 983 void array_set_int_at(int index, int value) { | |
| 984 int aindex = index + array_start_off_set; | |
| 985 set_int_at(aindex, value); | |
| 986 } | |
| 987 | |
| 988 // Code generation support for subclasses. | |
| 989 static ByteSize array_element_offset(int index) { | |
| 990 return cell_offset(array_start_off_set + index); | |
| 991 } | |
| 992 | |
| 993 public: | |
| 994 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
| 995 | |
| 996 virtual bool is_ArrayData() { return true; } | |
| 997 | |
| 998 static int static_cell_count() { | |
| 999 return -1; | |
| 1000 } | |
| 1001 | |
| 1002 int array_len() { | |
| 1003 return int_at_unchecked(array_len_off_set); | |
| 1004 } | |
| 1005 | |
| 1006 virtual int cell_count() { | |
| 1007 return array_len() + 1; | |
| 1008 } | |
| 1009 | |
| 1010 // Code generation support | |
| 1011 static ByteSize array_len_offset() { | |
| 1012 return cell_offset(array_len_off_set); | |
| 1013 } | |
| 1014 static ByteSize array_start_offset() { | |
| 1015 return cell_offset(array_start_off_set); | |
| 1016 } | |
| 1017 }; | |
| 1018 | |
| 1019 // MultiBranchData | |
| 1020 // | |
| 1021 // A MultiBranchData is used to access profiling information for | |
| 1022 // a multi-way branch (*switch bytecodes). It consists of a series | |
| 1023 // of (count, displacement) pairs, which count the number of times each | |
| 1024 // case was taken and specify the data displacment for each branch target. | |
| 1025 class MultiBranchData : public ArrayData { | |
| 1026 protected: | |
| 1027 enum { | |
| 1028 default_count_off_set, | |
| 1029 default_disaplacement_off_set, | |
| 1030 case_array_start | |
| 1031 }; | |
| 1032 enum { | |
| 1033 relative_count_off_set, | |
| 1034 relative_displacement_off_set, | |
| 1035 per_case_cell_count | |
| 1036 }; | |
| 1037 | |
| 1038 void set_default_displacement(int displacement) { | |
| 1039 array_set_int_at(default_disaplacement_off_set, displacement); | |
| 1040 } | |
| 1041 void set_displacement_at(int index, int displacement) { | |
| 1042 array_set_int_at(case_array_start + | |
| 1043 index * per_case_cell_count + | |
| 1044 relative_displacement_off_set, | |
| 1045 displacement); | |
| 1046 } | |
| 1047 | |
| 1048 public: | |
| 1049 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
| 1050 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
| 1051 } | |
| 1052 | |
| 1053 virtual bool is_MultiBranchData() { return true; } | |
| 1054 | |
| 1055 static int compute_cell_count(BytecodeStream* stream); | |
| 1056 | |
| 1057 int number_of_cases() { | |
| 1058 int alen = array_len() - 2; // get rid of default case here. | |
| 1059 assert(alen % per_case_cell_count == 0, "must be even"); | |
| 1060 return (alen / per_case_cell_count); | |
| 1061 } | |
| 1062 | |
| 1063 uint default_count() { | |
| 1064 return array_uint_at(default_count_off_set); | |
| 1065 } | |
| 1066 int default_displacement() { | |
| 1067 return array_int_at(default_disaplacement_off_set); | |
| 1068 } | |
| 1069 | |
| 1070 uint count_at(int index) { | |
| 1071 return array_uint_at(case_array_start + | |
| 1072 index * per_case_cell_count + | |
| 1073 relative_count_off_set); | |
| 1074 } | |
| 1075 int displacement_at(int index) { | |
| 1076 return array_int_at(case_array_start + | |
| 1077 index * per_case_cell_count + | |
| 1078 relative_displacement_off_set); | |
| 1079 } | |
| 1080 | |
| 1081 // Code generation support | |
| 1082 static ByteSize default_count_offset() { | |
| 1083 return array_element_offset(default_count_off_set); | |
| 1084 } | |
| 1085 static ByteSize default_displacement_offset() { | |
| 1086 return array_element_offset(default_disaplacement_off_set); | |
| 1087 } | |
| 1088 static ByteSize case_count_offset(int index) { | |
| 1089 return case_array_offset() + | |
| 1090 (per_case_size() * index) + | |
| 1091 relative_count_offset(); | |
| 1092 } | |
| 1093 static ByteSize case_array_offset() { | |
| 1094 return array_element_offset(case_array_start); | |
| 1095 } | |
| 1096 static ByteSize per_case_size() { | |
| 1097 return in_ByteSize(per_case_cell_count) * cell_size; | |
| 1098 } | |
| 1099 static ByteSize relative_count_offset() { | |
| 1100 return in_ByteSize(relative_count_off_set) * cell_size; | |
| 1101 } | |
| 1102 static ByteSize relative_displacement_offset() { | |
| 1103 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
| 1104 } | |
| 1105 | |
| 1106 // Specific initialization. | |
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1107 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 1108 |
| 1109 #ifndef PRODUCT | |
| 1110 void print_data_on(outputStream* st); | |
| 1111 #endif | |
| 1112 }; | |
| 1113 | |
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1114 class ArgInfoData : public ArrayData { |
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1115 |
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1116 public: |
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1117 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1118 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1119 } |
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1120 |
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1121 virtual bool is_ArgInfoData() { return true; } |
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1122 |
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1123 |
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1124 int number_of_args() { |
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1125 return array_len(); |
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1126 } |
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1127 |
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1128 uint arg_modified(int arg) { |
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1129 return array_uint_at(arg); |
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1130 } |
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1131 |
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1132 void set_arg_modified(int arg, uint val) { |
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1133 array_set_int_at(arg, val); |
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1134 } |
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1135 |
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1136 #ifndef PRODUCT |
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1137 void print_data_on(outputStream* st); |
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1138 #endif |
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1139 }; |
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1140 |
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1141 // MethodData* |
| 0 | 1142 // |
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1143 // A MethodData* holds information which has been collected about |
| 0 | 1144 // a method. Its layout looks like this: |
| 1145 // | |
| 1146 // ----------------------------- | |
| 1147 // | header | | |
| 1148 // | klass | | |
| 1149 // ----------------------------- | |
| 1150 // | method | | |
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1151 // | size of the MethodData* | |
| 0 | 1152 // ----------------------------- |
| 1153 // | Data entries... | | |
| 1154 // | (variable size) | | |
| 1155 // | | | |
| 1156 // . . | |
| 1157 // . . | |
| 1158 // . . | |
| 1159 // | | | |
| 1160 // ----------------------------- | |
| 1161 // | |
| 1162 // The data entry area is a heterogeneous array of DataLayouts. Each | |
| 1163 // DataLayout in the array corresponds to a specific bytecode in the | |
| 1164 // method. The entries in the array are sorted by the corresponding | |
| 1165 // bytecode. Access to the data is via resource-allocated ProfileData, | |
| 1166 // which point to the underlying blocks of DataLayout structures. | |
| 1167 // | |
| 1168 // During interpretation, if profiling in enabled, the interpreter | |
| 1169 // maintains a method data pointer (mdp), which points at the entry | |
| 1170 // in the array corresponding to the current bci. In the course of | |
| 1171 // intepretation, when a bytecode is encountered that has profile data | |
| 1172 // associated with it, the entry pointed to by mdp is updated, then the | |
| 1173 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
| 1174 // is NULL to begin with, the interpreter assumes that the current method | |
| 1175 // is not (yet) being profiled. | |
| 1176 // | |
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1177 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
| 0 | 1178 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
| 1179 // from the base of the data entry array. A "displacement" is the byte offset | |
| 1180 // in certain ProfileData objects that indicate the amount the mdp must be | |
| 1181 // adjusted in the event of a change in control flow. | |
| 1182 // | |
| 1183 | |
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1184 class MethodData : public Metadata { |
| 0 | 1185 friend class VMStructs; |
| 1186 private: | |
| 1187 friend class ProfileData; | |
| 1188 | |
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1189 // Back pointer to the Method* |
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1190 Method* _method; |
| 0 | 1191 |
| 1192 // Size of this oop in bytes | |
| 1193 int _size; | |
| 1194 | |
| 1195 // Cached hint for bci_to_dp and bci_to_data | |
| 1196 int _hint_di; | |
| 1197 | |
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1198 MethodData(methodHandle method, int size, TRAPS); |
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1199 public: |
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1200 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1201 MethodData() {}; // For ciMethodData |
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1202 |
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1203 bool is_methodData() const volatile { return true; } |
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1204 void initialize(); |
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1205 |
| 0 | 1206 // Whole-method sticky bits and flags |
| 1207 enum { | |
| 3345 | 1208 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
| 0 | 1209 _trap_hist_mask = max_jubyte, |
| 1210 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
| 1211 }; // Public flag values | |
| 1212 private: | |
| 1213 uint _nof_decompiles; // count of all nmethod removals | |
| 1214 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
| 1215 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
| 1216 union { | |
| 1217 intptr_t _align; | |
| 1218 u1 _array[_trap_hist_limit]; | |
| 1219 } _trap_hist; | |
| 1220 | |
| 1221 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
| 1222 intx _eflags; // flags on escape information | |
| 1223 intx _arg_local; // bit set of non-escaping arguments | |
| 1224 intx _arg_stack; // bit set of stack-allocatable arguments | |
| 1225 intx _arg_returned; // bit set of returned arguments | |
| 1226 | |
| 1783 | 1227 int _creation_mileage; // method mileage at MDO creation |
| 1228 | |
| 1229 // How many invocations has this MDO seen? | |
| 1230 // These counters are used to determine the exact age of MDO. | |
| 1231 // We need those because in tiered a method can be concurrently | |
| 1232 // executed at different levels. | |
| 1233 InvocationCounter _invocation_counter; | |
| 1234 // Same for backedges. | |
| 1235 InvocationCounter _backedge_counter; | |
| 2252 | 1236 // Counter values at the time profiling started. |
| 1237 int _invocation_counter_start; | |
| 1238 int _backedge_counter_start; | |
| 1783 | 1239 // Number of loops and blocks is computed when compiling the first |
| 1240 // time with C1. It is used to determine if method is trivial. | |
| 1241 short _num_loops; | |
| 1242 short _num_blocks; | |
| 1243 // Highest compile level this method has ever seen. | |
| 1244 u1 _highest_comp_level; | |
| 1245 // Same for OSR level | |
| 1246 u1 _highest_osr_comp_level; | |
| 1247 // Does this method contain anything worth profiling? | |
| 1248 bool _would_profile; | |
| 0 | 1249 |
| 1250 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
| 1251 int _data_size; | |
| 1252 | |
| 1253 // Beginning of the data entries | |
| 1254 intptr_t _data[1]; | |
| 1255 | |
| 1256 // Helper for size computation | |
| 1257 static int compute_data_size(BytecodeStream* stream); | |
| 1258 static int bytecode_cell_count(Bytecodes::Code code); | |
| 1259 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
| 1260 | |
| 1261 // Helper for initialization | |
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1262 DataLayout* data_layout_at(int data_index) const { |
| 0 | 1263 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
| 1264 return (DataLayout*) (((address)_data) + data_index); | |
| 1265 } | |
| 1266 | |
| 1267 // Initialize an individual data segment. Returns the size of | |
| 1268 // the segment in bytes. | |
| 1269 int initialize_data(BytecodeStream* stream, int data_index); | |
| 1270 | |
| 1271 // Helper for data_at | |
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1272 DataLayout* limit_data_position() const { |
| 0 | 1273 return (DataLayout*)((address)data_base() + _data_size); |
| 1274 } | |
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1275 bool out_of_bounds(int data_index) const { |
| 0 | 1276 return data_index >= data_size(); |
| 1277 } | |
| 1278 | |
| 1279 // Give each of the data entries a chance to perform specific | |
| 1280 // data initialization. | |
| 1281 void post_initialize(BytecodeStream* stream); | |
| 1282 | |
| 1283 // hint accessors | |
| 1284 int hint_di() const { return _hint_di; } | |
| 1285 void set_hint_di(int di) { | |
| 1286 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
| 1287 _hint_di = di; | |
| 1288 } | |
| 1289 ProfileData* data_before(int bci) { | |
| 1290 // avoid SEGV on this edge case | |
| 1291 if (data_size() == 0) | |
| 1292 return NULL; | |
| 1293 int hint = hint_di(); | |
| 1294 if (data_layout_at(hint)->bci() <= bci) | |
| 1295 return data_at(hint); | |
| 1296 return first_data(); | |
| 1297 } | |
| 1298 | |
| 1299 // What is the index of the first data entry? | |
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1300 int first_di() const { return 0; } |
| 0 | 1301 |
| 1302 // Find or create an extra ProfileData: | |
| 1303 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
| 1304 | |
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1305 // return the argument info cell |
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1306 ArgInfoData *arg_info(); |
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1307 |
| 0 | 1308 public: |
| 1309 static int header_size() { | |
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1310 return sizeof(MethodData)/wordSize; |
| 0 | 1311 } |
| 1312 | |
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1313 // Compute the size of a MethodData* before it is created. |
| 0 | 1314 static int compute_allocation_size_in_bytes(methodHandle method); |
| 1315 static int compute_allocation_size_in_words(methodHandle method); | |
| 1316 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
| 1317 | |
| 1318 // Determine if a given bytecode can have profile information. | |
| 1319 static bool bytecode_has_profile(Bytecodes::Code code) { | |
| 1320 return bytecode_cell_count(code) != no_profile_data; | |
| 1321 } | |
| 1322 | |
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1323 // reset into original state |
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1324 void init(); |
| 0 | 1325 |
| 1326 // My size | |
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1327 int size_in_bytes() const { return _size; } |
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1328 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
| 7956 | 1329 #if INCLUDE_SERVICES |
| 1330 void collect_statistics(KlassSizeStats *sz) const; | |
| 1331 #endif | |
| 0 | 1332 |
| 1333 int creation_mileage() const { return _creation_mileage; } | |
| 1334 void set_creation_mileage(int x) { _creation_mileage = x; } | |
| 1783 | 1335 |
| 1336 int invocation_count() { | |
| 1337 if (invocation_counter()->carry()) { | |
| 1338 return InvocationCounter::count_limit; | |
| 1339 } | |
| 1340 return invocation_counter()->count(); | |
| 1341 } | |
| 1342 int backedge_count() { | |
| 1343 if (backedge_counter()->carry()) { | |
| 1344 return InvocationCounter::count_limit; | |
| 1345 } | |
| 1346 return backedge_counter()->count(); | |
| 1347 } | |
| 1348 | |
| 2252 | 1349 int invocation_count_start() { |
| 1350 if (invocation_counter()->carry()) { | |
| 1351 return 0; | |
| 1352 } | |
| 1353 return _invocation_counter_start; | |
| 1354 } | |
| 1355 | |
| 1356 int backedge_count_start() { | |
| 1357 if (backedge_counter()->carry()) { | |
| 1358 return 0; | |
| 1359 } | |
| 1360 return _backedge_counter_start; | |
| 1361 } | |
| 1362 | |
| 1363 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
| 1364 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
| 1365 | |
| 1366 void reset_start_counters() { | |
| 1367 _invocation_counter_start = invocation_count(); | |
| 1368 _backedge_counter_start = backedge_count(); | |
| 1369 } | |
| 1370 | |
| 1783 | 1371 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
| 1372 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
| 1373 | |
| 1374 void set_would_profile(bool p) { _would_profile = p; } | |
| 1375 bool would_profile() const { return _would_profile; } | |
| 1376 | |
| 1377 int highest_comp_level() { return _highest_comp_level; } | |
| 1378 void set_highest_comp_level(int level) { _highest_comp_level = level; } | |
| 1379 int highest_osr_comp_level() { return _highest_osr_comp_level; } | |
| 1380 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } | |
| 1381 | |
| 1382 int num_loops() const { return _num_loops; } | |
| 1383 void set_num_loops(int n) { _num_loops = n; } | |
| 1384 int num_blocks() const { return _num_blocks; } | |
| 1385 void set_num_blocks(int n) { _num_blocks = n; } | |
| 1386 | |
| 0 | 1387 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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1388 static int mileage_of(Method* m); |
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1389 static bool is_empty_data(int size, Bytecodes::Code code); |
| 0 | 1390 |
| 1391 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
| 1392 enum EscapeFlag { | |
| 1393 estimated = 1 << 0, | |
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1394 return_local = 1 << 1, |
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1395 return_allocated = 1 << 2, |
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1396 allocated_escapes = 1 << 3, |
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1397 unknown_modified = 1 << 4 |
| 0 | 1398 }; |
| 1399 | |
| 1400 intx eflags() { return _eflags; } | |
| 1401 intx arg_local() { return _arg_local; } | |
| 1402 intx arg_stack() { return _arg_stack; } | |
| 1403 intx arg_returned() { return _arg_returned; } | |
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1404 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1405 assert(aid != NULL, "arg_info must be not null"); |
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1406 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1407 return aid->arg_modified(a); } |
| 0 | 1408 |
| 1409 void set_eflags(intx v) { _eflags = v; } | |
| 1410 void set_arg_local(intx v) { _arg_local = v; } | |
| 1411 void set_arg_stack(intx v) { _arg_stack = v; } | |
| 1412 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1413 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1414 assert(aid != NULL, "arg_info must be not null"); |
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1415 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1416 aid->set_arg_modified(a, v); } |
| 0 | 1417 |
| 1418 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
| 1419 | |
| 1420 // Location and size of data area | |
| 1421 address data_base() const { | |
| 1422 return (address) _data; | |
| 1423 } | |
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1424 int data_size() const { |
| 0 | 1425 return _data_size; |
| 1426 } | |
| 1427 | |
| 1428 // Accessors | |
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1429 Method* method() const { return _method; } |
| 0 | 1430 |
| 1431 // Get the data at an arbitrary (sort of) data index. | |
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1432 ProfileData* data_at(int data_index) const; |
| 0 | 1433 |
| 1434 // Walk through the data in order. | |
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1435 ProfileData* first_data() const { return data_at(first_di()); } |
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1436 ProfileData* next_data(ProfileData* current) const; |
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1437 bool is_valid(ProfileData* current) const { return current != NULL; } |
| 0 | 1438 |
| 1439 // Convert a dp (data pointer) to a di (data index). | |
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1440 int dp_to_di(address dp) const { |
| 0 | 1441 return dp - ((address)_data); |
| 1442 } | |
| 1443 | |
| 1444 address di_to_dp(int di) { | |
| 1445 return (address)data_layout_at(di); | |
| 1446 } | |
| 1447 | |
| 1448 // bci to di/dp conversion. | |
| 1449 address bci_to_dp(int bci); | |
| 1450 int bci_to_di(int bci) { | |
| 1451 return dp_to_di(bci_to_dp(bci)); | |
| 1452 } | |
| 1453 | |
| 1454 // Get the data at an arbitrary bci, or NULL if there is none. | |
| 1455 ProfileData* bci_to_data(int bci); | |
| 1456 | |
| 1457 // Same, but try to create an extra_data record if one is needed: | |
| 1458 ProfileData* allocate_bci_to_data(int bci) { | |
| 1459 ProfileData* data = bci_to_data(bci); | |
| 1460 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
| 1461 } | |
| 1462 | |
| 1463 // Add a handful of extra data records, for trap tracking. | |
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1464 DataLayout* extra_data_base() const { return limit_data_position(); } |
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1465 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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1466 int extra_data_size() const { return (address)extra_data_limit() |
| 0 | 1467 - (address)extra_data_base(); } |
| 1468 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
| 1469 | |
| 1470 // Return (uint)-1 for overflow. | |
| 1471 uint trap_count(int reason) const { | |
| 1472 assert((uint)reason < _trap_hist_limit, "oob"); | |
| 1473 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
| 1474 } | |
| 1475 // For loops: | |
| 1476 static uint trap_reason_limit() { return _trap_hist_limit; } | |
| 1477 static uint trap_count_limit() { return _trap_hist_mask; } | |
| 1478 uint inc_trap_count(int reason) { | |
| 1479 // Count another trap, anywhere in this method. | |
| 1480 assert(reason >= 0, "must be single trap"); | |
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1481 assert((uint)reason < _trap_hist_limit, "oob"); |
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1482 uint cnt1 = 1 + _trap_hist._array[reason]; |
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1483 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... |
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1484 _trap_hist._array[reason] = cnt1; |
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1485 return cnt1; |
| 0 | 1486 } else { |
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1487 return _trap_hist_mask + (++_nof_overflow_traps); |
| 0 | 1488 } |
| 1489 } | |
| 1490 | |
| 1491 uint overflow_trap_count() const { | |
| 1492 return _nof_overflow_traps; | |
| 1493 } | |
| 1494 uint overflow_recompile_count() const { | |
| 1495 return _nof_overflow_recompiles; | |
| 1496 } | |
| 1497 void inc_overflow_recompile_count() { | |
| 1498 _nof_overflow_recompiles += 1; | |
| 1499 } | |
| 1500 uint decompile_count() const { | |
| 1501 return _nof_decompiles; | |
| 1502 } | |
| 1503 void inc_decompile_count() { | |
| 1504 _nof_decompiles += 1; | |
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1505 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
| 7998 | 1506 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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1507 } |
| 0 | 1508 } |
| 1509 | |
| 1510 // Support for code generation | |
| 1511 static ByteSize data_offset() { | |
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1512 return byte_offset_of(MethodData, _data[0]); |
| 0 | 1513 } |
| 1514 | |
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1515 static ByteSize trap_history_offset() { |
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1516 return byte_offset_of(MethodData, _trap_hist._array); |
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1517 } |
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1518 |
| 1783 | 1519 static ByteSize invocation_counter_offset() { |
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1520 return byte_offset_of(MethodData, _invocation_counter); |
| 1783 | 1521 } |
| 1522 static ByteSize backedge_counter_offset() { | |
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1523 return byte_offset_of(MethodData, _backedge_counter); |
| 1783 | 1524 } |
| 1525 | |
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1526 // Deallocation support - no pointer fields to deallocate |
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1527 void deallocate_contents(ClassLoaderData* loader_data) {} |
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1528 |
| 0 | 1529 // GC support |
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1530 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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1531 |
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1532 // Printing |
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1533 #ifndef PRODUCT |
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1534 void print_on (outputStream* st) const; |
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1535 #endif |
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1536 void print_value_on(outputStream* st) const; |
| 0 | 1537 |
| 1538 #ifndef PRODUCT | |
| 1539 // printing support for method data | |
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1540 void print_data_on(outputStream* st) const; |
| 0 | 1541 #endif |
| 1542 | |
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1543 const char* internal_name() const { return "{method data}"; } |
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1544 |
| 0 | 1545 // verification |
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1546 void verify_on(outputStream* st); |
| 0 | 1547 void verify_data_on(outputStream* st); |
| 1548 }; | |
| 1972 | 1549 |
| 1550 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |