Mercurial > hg > truffle
annotate src/share/vm/oops/methodDataOop.hpp @ 3345:bad7ecd0b6ed
5091921: Sign flip issues in loop optimizer
Summary: Fix integer overflow problem in the code generated by loop optimizer.
Reviewed-by: never
| author | kvn |
|---|---|
| date | Wed, 04 May 2011 13:12:42 -0700 |
| parents | f767174aac14 |
| children | c26de9aef2ed |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2227 | 2 * Copyright (c) 2000, 2011, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1251
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1251
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1251
diff
changeset
|
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" | |
| 30 #include "oops/methodOop.hpp" | |
| 31 #include "oops/oop.hpp" | |
| 32 #include "runtime/orderAccess.hpp" | |
| 33 | |
| 0 | 34 class BytecodeStream; |
| 35 | |
| 36 // The MethodData object collects counts and other profile information | |
| 37 // during zeroth-tier (interpretive) and first-tier execution. | |
| 38 // The profile is used later by compilation heuristics. Some heuristics | |
| 39 // enable use of aggressive (or "heroic") optimizations. An aggressive | |
| 40 // optimization often has a down-side, a corner case that it handles | |
| 41 // poorly, but which is thought to be rare. The profile provides | |
| 42 // evidence of this rarity for a given method or even BCI. It allows | |
| 43 // the compiler to back out of the optimization at places where it | |
| 44 // has historically been a poor choice. Other heuristics try to use | |
| 45 // specific information gathered about types observed at a given site. | |
| 46 // | |
| 47 // All data in the profile is approximate. It is expected to be accurate | |
| 48 // on the whole, but the system expects occasional inaccuraces, due to | |
| 49 // counter overflow, multiprocessor races during data collection, space | |
| 50 // limitations, missing MDO blocks, etc. Bad or missing data will degrade | |
| 51 // optimization quality but will not affect correctness. Also, each MDO | |
| 52 // is marked with its birth-date ("creation_mileage") which can be used | |
| 53 // to assess the quality ("maturity") of its data. | |
| 54 // | |
| 55 // Short (<32-bit) counters are designed to overflow to a known "saturated" | |
| 56 // state. Also, certain recorded per-BCI events are given one-bit counters | |
| 57 // which overflow to a saturated state which applied to all counters at | |
| 58 // that BCI. In other words, there is a small lattice which approximates | |
| 59 // the ideal of an infinite-precision counter for each event at each BCI, | |
| 60 // and the lattice quickly "bottoms out" in a state where all counters | |
| 61 // are taken to be indefinitely large. | |
| 62 // | |
| 63 // The reader will find many data races in profile gathering code, starting | |
| 64 // with invocation counter incrementation. None of these races harm correct | |
| 65 // execution of the compiled code. | |
| 66 | |
| 941 | 67 // forward decl |
| 68 class ProfileData; | |
| 69 | |
| 0 | 70 // DataLayout |
| 71 // | |
| 72 // Overlay for generic profiling data. | |
| 73 class DataLayout VALUE_OBJ_CLASS_SPEC { | |
| 74 private: | |
| 75 // Every data layout begins with a header. This header | |
| 76 // contains a tag, which is used to indicate the size/layout | |
| 77 // of the data, 4 bits of flags, which can be used in any way, | |
| 78 // 4 bits of trap history (none/one reason/many reasons), | |
| 79 // and a bci, which is used to tie this piece of data to a | |
| 80 // specific bci in the bytecodes. | |
| 81 union { | |
| 82 intptr_t _bits; | |
| 83 struct { | |
| 84 u1 _tag; | |
| 85 u1 _flags; | |
| 86 u2 _bci; | |
| 87 } _struct; | |
| 88 } _header; | |
| 89 | |
| 90 // The data layout has an arbitrary number of cells, each sized | |
| 91 // to accomodate a pointer or an integer. | |
| 92 intptr_t _cells[1]; | |
| 93 | |
| 94 // Some types of data layouts need a length field. | |
| 95 static bool needs_array_len(u1 tag); | |
| 96 | |
| 97 public: | |
| 98 enum { | |
| 99 counter_increment = 1 | |
| 100 }; | |
| 101 | |
| 102 enum { | |
| 103 cell_size = sizeof(intptr_t) | |
| 104 }; | |
| 105 | |
| 106 // Tag values | |
| 107 enum { | |
| 108 no_tag, | |
| 109 bit_data_tag, | |
| 110 counter_data_tag, | |
| 111 jump_data_tag, | |
| 112 receiver_type_data_tag, | |
| 113 virtual_call_data_tag, | |
| 114 ret_data_tag, | |
| 115 branch_data_tag, | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
116 multi_branch_data_tag, |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
117 arg_info_data_tag |
| 0 | 118 }; |
| 119 | |
| 120 enum { | |
| 121 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
| 122 // The trap state breaks down further as [recompile:1 | reason:3]. | |
| 123 // This further breakdown is defined in deoptimization.cpp. | |
| 124 // See Deoptimization::trap_state_reason for an assert that | |
| 125 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
| 126 // | |
| 127 // The trap_state is collected only if ProfileTraps is true. | |
| 128 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
| 129 trap_shift = BitsPerByte - trap_bits, | |
| 130 trap_mask = right_n_bits(trap_bits), | |
| 131 trap_mask_in_place = (trap_mask << trap_shift), | |
| 132 flag_limit = trap_shift, | |
| 133 flag_mask = right_n_bits(flag_limit), | |
| 134 first_flag = 0 | |
| 135 }; | |
| 136 | |
| 137 // Size computation | |
| 138 static int header_size_in_bytes() { | |
| 139 return cell_size; | |
| 140 } | |
| 141 static int header_size_in_cells() { | |
| 142 return 1; | |
| 143 } | |
| 144 | |
| 145 static int compute_size_in_bytes(int cell_count) { | |
| 146 return header_size_in_bytes() + cell_count * cell_size; | |
| 147 } | |
| 148 | |
| 149 // Initialization | |
| 150 void initialize(u1 tag, u2 bci, int cell_count); | |
| 151 | |
| 152 // Accessors | |
| 153 u1 tag() { | |
| 154 return _header._struct._tag; | |
| 155 } | |
| 156 | |
| 157 // Return a few bits of trap state. Range is [0..trap_mask]. | |
| 158 // The state tells if traps with zero, one, or many reasons have occurred. | |
| 159 // It also tells whether zero or many recompilations have occurred. | |
| 160 // The associated trap histogram in the MDO itself tells whether | |
| 161 // traps are common or not. If a BCI shows that a trap X has | |
| 162 // occurred, and the MDO shows N occurrences of X, we make the | |
| 163 // simplifying assumption that all N occurrences can be blamed | |
| 164 // on that BCI. | |
| 165 int trap_state() { | |
| 166 return ((_header._struct._flags >> trap_shift) & trap_mask); | |
| 167 } | |
| 168 | |
| 169 void set_trap_state(int new_state) { | |
| 170 assert(ProfileTraps, "used only under +ProfileTraps"); | |
| 171 uint old_flags = (_header._struct._flags & flag_mask); | |
| 172 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
| 173 } | |
| 174 | |
| 175 u1 flags() { | |
| 176 return _header._struct._flags; | |
| 177 } | |
| 178 | |
| 179 u2 bci() { | |
| 180 return _header._struct._bci; | |
| 181 } | |
| 182 | |
| 183 void set_header(intptr_t value) { | |
| 184 _header._bits = value; | |
| 185 } | |
| 186 void release_set_header(intptr_t value) { | |
| 187 OrderAccess::release_store_ptr(&_header._bits, value); | |
| 188 } | |
| 189 intptr_t header() { | |
| 190 return _header._bits; | |
| 191 } | |
| 192 void set_cell_at(int index, intptr_t value) { | |
| 193 _cells[index] = value; | |
| 194 } | |
| 195 void release_set_cell_at(int index, intptr_t value) { | |
| 196 OrderAccess::release_store_ptr(&_cells[index], value); | |
| 197 } | |
| 198 intptr_t cell_at(int index) { | |
| 199 return _cells[index]; | |
| 200 } | |
| 201 intptr_t* adr_cell_at(int index) { | |
| 202 return &_cells[index]; | |
| 203 } | |
| 204 oop* adr_oop_at(int index) { | |
| 205 return (oop*)&(_cells[index]); | |
| 206 } | |
| 207 | |
| 208 void set_flag_at(int flag_number) { | |
| 209 assert(flag_number < flag_limit, "oob"); | |
| 210 _header._struct._flags |= (0x1 << flag_number); | |
| 211 } | |
| 212 bool flag_at(int flag_number) { | |
| 213 assert(flag_number < flag_limit, "oob"); | |
| 214 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
| 215 } | |
| 216 | |
| 217 // Low-level support for code generation. | |
| 218 static ByteSize header_offset() { | |
| 219 return byte_offset_of(DataLayout, _header); | |
| 220 } | |
| 221 static ByteSize tag_offset() { | |
| 222 return byte_offset_of(DataLayout, _header._struct._tag); | |
| 223 } | |
| 224 static ByteSize flags_offset() { | |
| 225 return byte_offset_of(DataLayout, _header._struct._flags); | |
| 226 } | |
| 227 static ByteSize bci_offset() { | |
| 228 return byte_offset_of(DataLayout, _header._struct._bci); | |
| 229 } | |
| 230 static ByteSize cell_offset(int index) { | |
|
2333
f767174aac14
7021653: Parfait issue in hotspot/src/share/vm/oops/methodDataOops.hpp
coleenp
parents:
2264
diff
changeset
|
231 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
| 0 | 232 } |
| 233 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
| 234 static int flag_number_to_byte_constant(int flag_number) { | |
| 235 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
| 236 DataLayout temp; temp.set_header(0); | |
| 237 temp.set_flag_at(flag_number); | |
| 238 return temp._header._struct._flags; | |
| 239 } | |
| 240 // Return a value which, when or-ed as a word into _header, sets the flag. | |
| 241 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
| 242 DataLayout temp; temp.set_header(0); | |
| 243 temp._header._struct._flags = byte_constant; | |
| 244 return temp._header._bits; | |
| 245 } | |
| 941 | 246 |
| 247 // GC support | |
| 248 ProfileData* data_in(); | |
| 249 void follow_weak_refs(BoolObjectClosure* cl); | |
| 0 | 250 }; |
| 251 | |
| 252 | |
| 253 // ProfileData class hierarchy | |
| 254 class ProfileData; | |
| 255 class BitData; | |
| 256 class CounterData; | |
| 257 class ReceiverTypeData; | |
| 258 class VirtualCallData; | |
| 259 class RetData; | |
| 260 class JumpData; | |
| 261 class BranchData; | |
| 262 class ArrayData; | |
| 263 class MultiBranchData; | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
264 class ArgInfoData; |
| 0 | 265 |
| 266 | |
| 267 // ProfileData | |
| 268 // | |
| 269 // A ProfileData object is created to refer to a section of profiling | |
| 270 // data in a structured way. | |
| 271 class ProfileData : public ResourceObj { | |
| 272 private: | |
| 273 #ifndef PRODUCT | |
| 274 enum { | |
| 275 tab_width_one = 16, | |
| 276 tab_width_two = 36 | |
| 277 }; | |
| 278 #endif // !PRODUCT | |
| 279 | |
| 280 // This is a pointer to a section of profiling data. | |
| 281 DataLayout* _data; | |
| 282 | |
| 283 protected: | |
| 284 DataLayout* data() { return _data; } | |
| 285 | |
| 286 enum { | |
| 287 cell_size = DataLayout::cell_size | |
| 288 }; | |
| 289 | |
| 290 public: | |
| 291 // How many cells are in this? | |
| 292 virtual int cell_count() { | |
| 293 ShouldNotReachHere(); | |
| 294 return -1; | |
| 295 } | |
| 296 | |
| 297 // Return the size of this data. | |
| 298 int size_in_bytes() { | |
| 299 return DataLayout::compute_size_in_bytes(cell_count()); | |
| 300 } | |
| 301 | |
| 302 protected: | |
| 303 // Low-level accessors for underlying data | |
| 304 void set_intptr_at(int index, intptr_t value) { | |
| 305 assert(0 <= index && index < cell_count(), "oob"); | |
| 306 data()->set_cell_at(index, value); | |
| 307 } | |
| 308 void release_set_intptr_at(int index, intptr_t value) { | |
| 309 assert(0 <= index && index < cell_count(), "oob"); | |
| 310 data()->release_set_cell_at(index, value); | |
| 311 } | |
| 312 intptr_t intptr_at(int index) { | |
| 313 assert(0 <= index && index < cell_count(), "oob"); | |
| 314 return data()->cell_at(index); | |
| 315 } | |
| 316 void set_uint_at(int index, uint value) { | |
| 317 set_intptr_at(index, (intptr_t) value); | |
| 318 } | |
| 319 void release_set_uint_at(int index, uint value) { | |
| 320 release_set_intptr_at(index, (intptr_t) value); | |
| 321 } | |
| 322 uint uint_at(int index) { | |
| 323 return (uint)intptr_at(index); | |
| 324 } | |
| 325 void set_int_at(int index, int value) { | |
| 326 set_intptr_at(index, (intptr_t) value); | |
| 327 } | |
| 328 void release_set_int_at(int index, int value) { | |
| 329 release_set_intptr_at(index, (intptr_t) value); | |
| 330 } | |
| 331 int int_at(int index) { | |
| 332 return (int)intptr_at(index); | |
| 333 } | |
| 334 int int_at_unchecked(int index) { | |
| 335 return (int)data()->cell_at(index); | |
| 336 } | |
| 337 void set_oop_at(int index, oop value) { | |
| 338 set_intptr_at(index, (intptr_t) value); | |
| 339 } | |
| 340 oop oop_at(int index) { | |
| 341 return (oop)intptr_at(index); | |
| 342 } | |
| 343 oop* adr_oop_at(int index) { | |
| 344 assert(0 <= index && index < cell_count(), "oob"); | |
| 345 return data()->adr_oop_at(index); | |
| 346 } | |
| 347 | |
| 348 void set_flag_at(int flag_number) { | |
| 349 data()->set_flag_at(flag_number); | |
| 350 } | |
| 351 bool flag_at(int flag_number) { | |
| 352 return data()->flag_at(flag_number); | |
| 353 } | |
| 354 | |
| 355 // two convenient imports for use by subclasses: | |
| 356 static ByteSize cell_offset(int index) { | |
| 357 return DataLayout::cell_offset(index); | |
| 358 } | |
| 359 static int flag_number_to_byte_constant(int flag_number) { | |
| 360 return DataLayout::flag_number_to_byte_constant(flag_number); | |
| 361 } | |
| 362 | |
| 363 ProfileData(DataLayout* data) { | |
| 364 _data = data; | |
| 365 } | |
| 366 | |
| 367 public: | |
| 368 // Constructor for invalid ProfileData. | |
| 369 ProfileData(); | |
| 370 | |
| 371 u2 bci() { | |
| 372 return data()->bci(); | |
| 373 } | |
| 374 | |
| 375 address dp() { | |
| 376 return (address)_data; | |
| 377 } | |
| 378 | |
| 379 int trap_state() { | |
| 380 return data()->trap_state(); | |
| 381 } | |
| 382 void set_trap_state(int new_state) { | |
| 383 data()->set_trap_state(new_state); | |
| 384 } | |
| 385 | |
| 386 // Type checking | |
| 387 virtual bool is_BitData() { return false; } | |
| 388 virtual bool is_CounterData() { return false; } | |
| 389 virtual bool is_JumpData() { return false; } | |
| 390 virtual bool is_ReceiverTypeData(){ return false; } | |
| 391 virtual bool is_VirtualCallData() { return false; } | |
| 392 virtual bool is_RetData() { return false; } | |
| 393 virtual bool is_BranchData() { return false; } | |
| 394 virtual bool is_ArrayData() { return false; } | |
| 395 virtual bool is_MultiBranchData() { return false; } | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
396 virtual bool is_ArgInfoData() { return false; } |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
397 |
| 0 | 398 |
| 399 BitData* as_BitData() { | |
| 400 assert(is_BitData(), "wrong type"); | |
| 401 return is_BitData() ? (BitData*) this : NULL; | |
| 402 } | |
| 403 CounterData* as_CounterData() { | |
| 404 assert(is_CounterData(), "wrong type"); | |
| 405 return is_CounterData() ? (CounterData*) this : NULL; | |
| 406 } | |
| 407 JumpData* as_JumpData() { | |
| 408 assert(is_JumpData(), "wrong type"); | |
| 409 return is_JumpData() ? (JumpData*) this : NULL; | |
| 410 } | |
| 411 ReceiverTypeData* as_ReceiverTypeData() { | |
| 412 assert(is_ReceiverTypeData(), "wrong type"); | |
| 413 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
| 414 } | |
| 415 VirtualCallData* as_VirtualCallData() { | |
| 416 assert(is_VirtualCallData(), "wrong type"); | |
| 417 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
| 418 } | |
| 419 RetData* as_RetData() { | |
| 420 assert(is_RetData(), "wrong type"); | |
| 421 return is_RetData() ? (RetData*) this : NULL; | |
| 422 } | |
| 423 BranchData* as_BranchData() { | |
| 424 assert(is_BranchData(), "wrong type"); | |
| 425 return is_BranchData() ? (BranchData*) this : NULL; | |
| 426 } | |
| 427 ArrayData* as_ArrayData() { | |
| 428 assert(is_ArrayData(), "wrong type"); | |
| 429 return is_ArrayData() ? (ArrayData*) this : NULL; | |
| 430 } | |
| 431 MultiBranchData* as_MultiBranchData() { | |
| 432 assert(is_MultiBranchData(), "wrong type"); | |
| 433 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
| 434 } | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
435 ArgInfoData* as_ArgInfoData() { |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
436 assert(is_ArgInfoData(), "wrong type"); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
437 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
438 } |
| 0 | 439 |
| 440 | |
| 441 // Subclass specific initialization | |
| 442 virtual void post_initialize(BytecodeStream* stream, methodDataOop mdo) {} | |
| 443 | |
| 444 // GC support | |
| 445 virtual void follow_contents() {} | |
| 446 virtual void oop_iterate(OopClosure* blk) {} | |
| 447 virtual void oop_iterate_m(OopClosure* blk, MemRegion mr) {} | |
| 448 virtual void adjust_pointers() {} | |
| 941 | 449 virtual void follow_weak_refs(BoolObjectClosure* is_alive_closure) {} |
| 0 | 450 |
| 451 #ifndef SERIALGC | |
| 452 // Parallel old support | |
| 453 virtual void follow_contents(ParCompactionManager* cm) {} | |
| 454 virtual void update_pointers() {} | |
| 455 #endif // SERIALGC | |
| 456 | |
| 457 // CI translation: ProfileData can represent both MethodDataOop data | |
| 458 // as well as CIMethodData data. This function is provided for translating | |
| 459 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
| 460 // most ProfileData don't require any translation, so we provide the null | |
| 461 // translation here, and the required translators are in the ci subclasses. | |
| 462 virtual void translate_from(ProfileData* data) {} | |
| 463 | |
| 464 virtual void print_data_on(outputStream* st) { | |
| 465 ShouldNotReachHere(); | |
| 466 } | |
| 467 | |
| 468 #ifndef PRODUCT | |
| 469 void print_shared(outputStream* st, const char* name); | |
| 470 void tab(outputStream* st); | |
| 471 #endif | |
| 472 }; | |
| 473 | |
| 474 // BitData | |
| 475 // | |
| 476 // A BitData holds a flag or two in its header. | |
| 477 class BitData : public ProfileData { | |
| 478 protected: | |
| 479 enum { | |
| 480 // null_seen: | |
| 481 // saw a null operand (cast/aastore/instanceof) | |
| 482 null_seen_flag = DataLayout::first_flag + 0 | |
| 483 }; | |
| 484 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
| 485 public: | |
| 486 BitData(DataLayout* layout) : ProfileData(layout) { | |
| 487 } | |
| 488 | |
| 489 virtual bool is_BitData() { return true; } | |
| 490 | |
| 491 static int static_cell_count() { | |
| 492 return bit_cell_count; | |
| 493 } | |
| 494 | |
| 495 virtual int cell_count() { | |
| 496 return static_cell_count(); | |
| 497 } | |
| 498 | |
| 499 // Accessor | |
| 500 | |
| 501 // The null_seen flag bit is specially known to the interpreter. | |
| 502 // Consulting it allows the compiler to avoid setting up null_check traps. | |
| 503 bool null_seen() { return flag_at(null_seen_flag); } | |
| 504 void set_null_seen() { set_flag_at(null_seen_flag); } | |
| 505 | |
| 506 | |
| 507 // Code generation support | |
| 508 static int null_seen_byte_constant() { | |
| 509 return flag_number_to_byte_constant(null_seen_flag); | |
| 510 } | |
| 511 | |
| 512 static ByteSize bit_data_size() { | |
| 513 return cell_offset(bit_cell_count); | |
| 514 } | |
| 515 | |
| 516 #ifndef PRODUCT | |
| 517 void print_data_on(outputStream* st); | |
| 518 #endif | |
| 519 }; | |
| 520 | |
| 521 // CounterData | |
| 522 // | |
| 523 // A CounterData corresponds to a simple counter. | |
| 524 class CounterData : public BitData { | |
| 525 protected: | |
| 526 enum { | |
| 527 count_off, | |
| 528 counter_cell_count | |
| 529 }; | |
| 530 public: | |
| 531 CounterData(DataLayout* layout) : BitData(layout) {} | |
| 532 | |
| 533 virtual bool is_CounterData() { return true; } | |
| 534 | |
| 535 static int static_cell_count() { | |
| 536 return counter_cell_count; | |
| 537 } | |
| 538 | |
| 539 virtual int cell_count() { | |
| 540 return static_cell_count(); | |
| 541 } | |
| 542 | |
| 543 // Direct accessor | |
| 544 uint count() { | |
| 545 return uint_at(count_off); | |
| 546 } | |
| 547 | |
| 548 // Code generation support | |
| 549 static ByteSize count_offset() { | |
| 550 return cell_offset(count_off); | |
| 551 } | |
| 552 static ByteSize counter_data_size() { | |
| 553 return cell_offset(counter_cell_count); | |
| 554 } | |
| 555 | |
|
1251
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
556 void set_count(uint count) { |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
557 set_uint_at(count_off, count); |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
558 } |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
559 |
| 0 | 560 #ifndef PRODUCT |
| 561 void print_data_on(outputStream* st); | |
| 562 #endif | |
| 563 }; | |
| 564 | |
| 565 // JumpData | |
| 566 // | |
| 567 // A JumpData is used to access profiling information for a direct | |
| 568 // branch. It is a counter, used for counting the number of branches, | |
| 569 // plus a data displacement, used for realigning the data pointer to | |
| 570 // the corresponding target bci. | |
| 571 class JumpData : public ProfileData { | |
| 572 protected: | |
| 573 enum { | |
| 574 taken_off_set, | |
| 575 displacement_off_set, | |
| 576 jump_cell_count | |
| 577 }; | |
| 578 | |
| 579 void set_displacement(int displacement) { | |
| 580 set_int_at(displacement_off_set, displacement); | |
| 581 } | |
| 582 | |
| 583 public: | |
| 584 JumpData(DataLayout* layout) : ProfileData(layout) { | |
| 585 assert(layout->tag() == DataLayout::jump_data_tag || | |
| 586 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
| 587 } | |
| 588 | |
| 589 virtual bool is_JumpData() { return true; } | |
| 590 | |
| 591 static int static_cell_count() { | |
| 592 return jump_cell_count; | |
| 593 } | |
| 594 | |
| 595 virtual int cell_count() { | |
| 596 return static_cell_count(); | |
| 597 } | |
| 598 | |
| 599 // Direct accessor | |
| 600 uint taken() { | |
| 601 return uint_at(taken_off_set); | |
| 602 } | |
| 603 // Saturating counter | |
| 604 uint inc_taken() { | |
| 605 uint cnt = taken() + 1; | |
| 606 // Did we wrap? Will compiler screw us?? | |
| 607 if (cnt == 0) cnt--; | |
| 608 set_uint_at(taken_off_set, cnt); | |
| 609 return cnt; | |
| 610 } | |
| 611 | |
| 612 int displacement() { | |
| 613 return int_at(displacement_off_set); | |
| 614 } | |
| 615 | |
| 616 // Code generation support | |
| 617 static ByteSize taken_offset() { | |
| 618 return cell_offset(taken_off_set); | |
| 619 } | |
| 620 | |
| 621 static ByteSize displacement_offset() { | |
| 622 return cell_offset(displacement_off_set); | |
| 623 } | |
| 624 | |
| 625 // Specific initialization. | |
| 626 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
| 627 | |
| 628 #ifndef PRODUCT | |
| 629 void print_data_on(outputStream* st); | |
| 630 #endif | |
| 631 }; | |
| 632 | |
| 633 // ReceiverTypeData | |
| 634 // | |
| 635 // A ReceiverTypeData is used to access profiling information about a | |
| 636 // dynamic type check. It consists of a counter which counts the total times | |
| 637 // that the check is reached, and a series of (klassOop, count) pairs | |
| 638 // which are used to store a type profile for the receiver of the check. | |
| 639 class ReceiverTypeData : public CounterData { | |
| 640 protected: | |
| 641 enum { | |
| 642 receiver0_offset = counter_cell_count, | |
| 643 count0_offset, | |
| 644 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
| 645 }; | |
| 646 | |
| 647 public: | |
| 648 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
| 649 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
| 650 layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
| 651 } | |
| 652 | |
| 653 virtual bool is_ReceiverTypeData() { return true; } | |
| 654 | |
| 655 static int static_cell_count() { | |
| 656 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
| 657 } | |
| 658 | |
| 659 virtual int cell_count() { | |
| 660 return static_cell_count(); | |
| 661 } | |
| 662 | |
| 663 // Direct accessors | |
| 664 static uint row_limit() { | |
| 665 return TypeProfileWidth; | |
| 666 } | |
| 667 static int receiver_cell_index(uint row) { | |
| 668 return receiver0_offset + row * receiver_type_row_cell_count; | |
| 669 } | |
| 670 static int receiver_count_cell_index(uint row) { | |
| 671 return count0_offset + row * receiver_type_row_cell_count; | |
| 672 } | |
| 673 | |
| 674 // Get the receiver at row. The 'unchecked' version is needed by parallel old | |
| 675 // gc; it does not assert the receiver is a klass. During compaction of the | |
| 676 // perm gen, the klass may already have moved, so the is_klass() predicate | |
| 677 // would fail. The 'normal' version should be used whenever possible. | |
| 678 klassOop receiver_unchecked(uint row) { | |
| 679 assert(row < row_limit(), "oob"); | |
| 680 oop recv = oop_at(receiver_cell_index(row)); | |
| 681 return (klassOop)recv; | |
| 682 } | |
| 683 | |
| 684 klassOop receiver(uint row) { | |
| 685 klassOop recv = receiver_unchecked(row); | |
| 686 assert(recv == NULL || ((oop)recv)->is_klass(), "wrong type"); | |
| 687 return recv; | |
| 688 } | |
| 689 | |
| 941 | 690 void set_receiver(uint row, oop p) { |
| 691 assert((uint)row < row_limit(), "oob"); | |
| 692 set_oop_at(receiver_cell_index(row), p); | |
| 693 } | |
| 694 | |
| 0 | 695 uint receiver_count(uint row) { |
| 696 assert(row < row_limit(), "oob"); | |
| 697 return uint_at(receiver_count_cell_index(row)); | |
| 698 } | |
| 699 | |
| 941 | 700 void set_receiver_count(uint row, uint count) { |
| 701 assert(row < row_limit(), "oob"); | |
| 702 set_uint_at(receiver_count_cell_index(row), count); | |
| 703 } | |
| 704 | |
| 705 void clear_row(uint row) { | |
| 706 assert(row < row_limit(), "oob"); | |
|
1251
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
707 // Clear total count - indicator of polymorphic call site. |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
708 // The site may look like as monomorphic after that but |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
709 // it allow to have more accurate profiling information because |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
710 // there was execution phase change since klasses were unloaded. |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
711 // If the site is still polymorphic then MDO will be updated |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
712 // to reflect it. But it could be the case that the site becomes |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
713 // only bimorphic. Then keeping total count not 0 will be wrong. |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
714 // Even if we use monomorphic (when it is not) for compilation |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
715 // we will only have trap, deoptimization and recompile again |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
716 // with updated MDO after executing method in Interpreter. |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
717 // An additional receiver will be recorded in the cleaned row |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
718 // during next call execution. |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
719 // |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
720 // Note: our profiling logic works with empty rows in any slot. |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
721 // We do sorting a profiling info (ciCallProfile) for compilation. |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
722 // |
|
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1206
diff
changeset
|
723 set_count(0); |
| 941 | 724 set_receiver(row, NULL); |
| 725 set_receiver_count(row, 0); | |
| 726 } | |
| 727 | |
| 0 | 728 // Code generation support |
| 729 static ByteSize receiver_offset(uint row) { | |
| 730 return cell_offset(receiver_cell_index(row)); | |
| 731 } | |
| 732 static ByteSize receiver_count_offset(uint row) { | |
| 733 return cell_offset(receiver_count_cell_index(row)); | |
| 734 } | |
| 735 static ByteSize receiver_type_data_size() { | |
| 736 return cell_offset(static_cell_count()); | |
| 737 } | |
| 738 | |
| 739 // GC support | |
| 740 virtual void follow_contents(); | |
| 741 virtual void oop_iterate(OopClosure* blk); | |
| 742 virtual void oop_iterate_m(OopClosure* blk, MemRegion mr); | |
| 743 virtual void adjust_pointers(); | |
| 941 | 744 virtual void follow_weak_refs(BoolObjectClosure* is_alive_closure); |
| 0 | 745 |
| 746 #ifndef SERIALGC | |
| 747 // Parallel old support | |
| 748 virtual void follow_contents(ParCompactionManager* cm); | |
| 749 virtual void update_pointers(); | |
| 750 #endif // SERIALGC | |
| 751 | |
| 752 oop* adr_receiver(uint row) { | |
| 753 return adr_oop_at(receiver_cell_index(row)); | |
| 754 } | |
| 755 | |
| 756 #ifndef PRODUCT | |
| 757 void print_receiver_data_on(outputStream* st); | |
| 758 void print_data_on(outputStream* st); | |
| 759 #endif | |
| 760 }; | |
| 761 | |
| 762 // VirtualCallData | |
| 763 // | |
| 764 // A VirtualCallData is used to access profiling information about a | |
| 765 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
| 766 class VirtualCallData : public ReceiverTypeData { | |
| 767 public: | |
| 768 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
| 769 assert(layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
| 770 } | |
| 771 | |
| 772 virtual bool is_VirtualCallData() { return true; } | |
| 773 | |
| 774 static int static_cell_count() { | |
| 775 // At this point we could add more profile state, e.g., for arguments. | |
| 776 // But for now it's the same size as the base record type. | |
| 777 return ReceiverTypeData::static_cell_count(); | |
| 778 } | |
| 779 | |
| 780 virtual int cell_count() { | |
| 781 return static_cell_count(); | |
| 782 } | |
| 783 | |
| 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 | |
| 872 address fixup_ret(int return_bci, methodDataHandle mdo); | |
| 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. | |
| 886 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
| 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 | |
| 929 uint inc_not_taken() { | |
| 930 uint cnt = not_taken() + 1; | |
| 931 // Did we wrap? Will compiler screw us?? | |
| 932 if (cnt == 0) cnt--; | |
| 933 set_uint_at(not_taken_off_set, cnt); | |
| 934 return cnt; | |
| 935 } | |
| 936 | |
| 937 // Code generation support | |
| 938 static ByteSize not_taken_offset() { | |
| 939 return cell_offset(not_taken_off_set); | |
| 940 } | |
| 941 static ByteSize branch_data_size() { | |
| 942 return cell_offset(branch_cell_count); | |
| 943 } | |
| 944 | |
| 945 // Specific initialization. | |
| 946 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
| 947 | |
| 948 #ifndef PRODUCT | |
| 949 void print_data_on(outputStream* st); | |
| 950 #endif | |
| 951 }; | |
| 952 | |
| 953 // ArrayData | |
| 954 // | |
| 955 // A ArrayData is a base class for accessing profiling data which does | |
| 956 // not have a statically known size. It consists of an array length | |
| 957 // and an array start. | |
| 958 class ArrayData : public ProfileData { | |
| 959 protected: | |
| 960 friend class DataLayout; | |
| 961 | |
| 962 enum { | |
| 963 array_len_off_set, | |
| 964 array_start_off_set | |
| 965 }; | |
| 966 | |
| 967 uint array_uint_at(int index) { | |
| 968 int aindex = index + array_start_off_set; | |
| 969 return uint_at(aindex); | |
| 970 } | |
| 971 int array_int_at(int index) { | |
| 972 int aindex = index + array_start_off_set; | |
| 973 return int_at(aindex); | |
| 974 } | |
| 975 oop array_oop_at(int index) { | |
| 976 int aindex = index + array_start_off_set; | |
| 977 return oop_at(aindex); | |
| 978 } | |
| 979 void array_set_int_at(int index, int value) { | |
| 980 int aindex = index + array_start_off_set; | |
| 981 set_int_at(aindex, value); | |
| 982 } | |
| 983 | |
| 984 // Code generation support for subclasses. | |
| 985 static ByteSize array_element_offset(int index) { | |
| 986 return cell_offset(array_start_off_set + index); | |
| 987 } | |
| 988 | |
| 989 public: | |
| 990 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
| 991 | |
| 992 virtual bool is_ArrayData() { return true; } | |
| 993 | |
| 994 static int static_cell_count() { | |
| 995 return -1; | |
| 996 } | |
| 997 | |
| 998 int array_len() { | |
| 999 return int_at_unchecked(array_len_off_set); | |
| 1000 } | |
| 1001 | |
| 1002 virtual int cell_count() { | |
| 1003 return array_len() + 1; | |
| 1004 } | |
| 1005 | |
| 1006 // Code generation support | |
| 1007 static ByteSize array_len_offset() { | |
| 1008 return cell_offset(array_len_off_set); | |
| 1009 } | |
| 1010 static ByteSize array_start_offset() { | |
| 1011 return cell_offset(array_start_off_set); | |
| 1012 } | |
| 1013 }; | |
| 1014 | |
| 1015 // MultiBranchData | |
| 1016 // | |
| 1017 // A MultiBranchData is used to access profiling information for | |
| 1018 // a multi-way branch (*switch bytecodes). It consists of a series | |
| 1019 // of (count, displacement) pairs, which count the number of times each | |
| 1020 // case was taken and specify the data displacment for each branch target. | |
| 1021 class MultiBranchData : public ArrayData { | |
| 1022 protected: | |
| 1023 enum { | |
| 1024 default_count_off_set, | |
| 1025 default_disaplacement_off_set, | |
| 1026 case_array_start | |
| 1027 }; | |
| 1028 enum { | |
| 1029 relative_count_off_set, | |
| 1030 relative_displacement_off_set, | |
| 1031 per_case_cell_count | |
| 1032 }; | |
| 1033 | |
| 1034 void set_default_displacement(int displacement) { | |
| 1035 array_set_int_at(default_disaplacement_off_set, displacement); | |
| 1036 } | |
| 1037 void set_displacement_at(int index, int displacement) { | |
| 1038 array_set_int_at(case_array_start + | |
| 1039 index * per_case_cell_count + | |
| 1040 relative_displacement_off_set, | |
| 1041 displacement); | |
| 1042 } | |
| 1043 | |
| 1044 public: | |
| 1045 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
| 1046 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
| 1047 } | |
| 1048 | |
| 1049 virtual bool is_MultiBranchData() { return true; } | |
| 1050 | |
| 1051 static int compute_cell_count(BytecodeStream* stream); | |
| 1052 | |
| 1053 int number_of_cases() { | |
| 1054 int alen = array_len() - 2; // get rid of default case here. | |
| 1055 assert(alen % per_case_cell_count == 0, "must be even"); | |
| 1056 return (alen / per_case_cell_count); | |
| 1057 } | |
| 1058 | |
| 1059 uint default_count() { | |
| 1060 return array_uint_at(default_count_off_set); | |
| 1061 } | |
| 1062 int default_displacement() { | |
| 1063 return array_int_at(default_disaplacement_off_set); | |
| 1064 } | |
| 1065 | |
| 1066 uint count_at(int index) { | |
| 1067 return array_uint_at(case_array_start + | |
| 1068 index * per_case_cell_count + | |
| 1069 relative_count_off_set); | |
| 1070 } | |
| 1071 int displacement_at(int index) { | |
| 1072 return array_int_at(case_array_start + | |
| 1073 index * per_case_cell_count + | |
| 1074 relative_displacement_off_set); | |
| 1075 } | |
| 1076 | |
| 1077 // Code generation support | |
| 1078 static ByteSize default_count_offset() { | |
| 1079 return array_element_offset(default_count_off_set); | |
| 1080 } | |
| 1081 static ByteSize default_displacement_offset() { | |
| 1082 return array_element_offset(default_disaplacement_off_set); | |
| 1083 } | |
| 1084 static ByteSize case_count_offset(int index) { | |
| 1085 return case_array_offset() + | |
| 1086 (per_case_size() * index) + | |
| 1087 relative_count_offset(); | |
| 1088 } | |
| 1089 static ByteSize case_array_offset() { | |
| 1090 return array_element_offset(case_array_start); | |
| 1091 } | |
| 1092 static ByteSize per_case_size() { | |
| 1093 return in_ByteSize(per_case_cell_count) * cell_size; | |
| 1094 } | |
| 1095 static ByteSize relative_count_offset() { | |
| 1096 return in_ByteSize(relative_count_off_set) * cell_size; | |
| 1097 } | |
| 1098 static ByteSize relative_displacement_offset() { | |
| 1099 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
| 1100 } | |
| 1101 | |
| 1102 // Specific initialization. | |
| 1103 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
| 1104 | |
| 1105 #ifndef PRODUCT | |
| 1106 void print_data_on(outputStream* st); | |
| 1107 #endif | |
| 1108 }; | |
| 1109 | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1110 class ArgInfoData : public ArrayData { |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1111 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1112 public: |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1113 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1114 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1115 } |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1116 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1117 virtual bool is_ArgInfoData() { return true; } |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1118 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1119 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1120 int number_of_args() { |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1121 return array_len(); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1122 } |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1123 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1124 uint arg_modified(int arg) { |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1125 return array_uint_at(arg); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1126 } |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1127 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1128 void set_arg_modified(int arg, uint val) { |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1129 array_set_int_at(arg, val); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1130 } |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1131 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1132 #ifndef PRODUCT |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1133 void print_data_on(outputStream* st); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1134 #endif |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1135 }; |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1136 |
| 0 | 1137 // methodDataOop |
| 1138 // | |
| 1139 // A methodDataOop holds information which has been collected about | |
| 1140 // a method. Its layout looks like this: | |
| 1141 // | |
| 1142 // ----------------------------- | |
| 1143 // | header | | |
| 1144 // | klass | | |
| 1145 // ----------------------------- | |
| 1146 // | method | | |
| 1147 // | size of the methodDataOop | | |
| 1148 // ----------------------------- | |
| 1149 // | Data entries... | | |
| 1150 // | (variable size) | | |
| 1151 // | | | |
| 1152 // . . | |
| 1153 // . . | |
| 1154 // . . | |
| 1155 // | | | |
| 1156 // ----------------------------- | |
| 1157 // | |
| 1158 // The data entry area is a heterogeneous array of DataLayouts. Each | |
| 1159 // DataLayout in the array corresponds to a specific bytecode in the | |
| 1160 // method. The entries in the array are sorted by the corresponding | |
| 1161 // bytecode. Access to the data is via resource-allocated ProfileData, | |
| 1162 // which point to the underlying blocks of DataLayout structures. | |
| 1163 // | |
| 1164 // During interpretation, if profiling in enabled, the interpreter | |
| 1165 // maintains a method data pointer (mdp), which points at the entry | |
| 1166 // in the array corresponding to the current bci. In the course of | |
| 1167 // intepretation, when a bytecode is encountered that has profile data | |
| 1168 // associated with it, the entry pointed to by mdp is updated, then the | |
| 1169 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
| 1170 // is NULL to begin with, the interpreter assumes that the current method | |
| 1171 // is not (yet) being profiled. | |
| 1172 // | |
| 1173 // In methodDataOop parlance, "dp" is a "data pointer", the actual address | |
| 1174 // of a DataLayout element. A "di" is a "data index", the offset in bytes | |
| 1175 // from the base of the data entry array. A "displacement" is the byte offset | |
| 1176 // in certain ProfileData objects that indicate the amount the mdp must be | |
| 1177 // adjusted in the event of a change in control flow. | |
| 1178 // | |
| 1179 | |
| 1180 class methodDataOopDesc : public oopDesc { | |
| 1181 friend class VMStructs; | |
| 1182 private: | |
| 1183 friend class ProfileData; | |
| 1184 | |
| 1185 // Back pointer to the methodOop | |
| 1186 methodOop _method; | |
| 1187 | |
| 1188 // Size of this oop in bytes | |
| 1189 int _size; | |
| 1190 | |
| 1191 // Cached hint for bci_to_dp and bci_to_data | |
| 1192 int _hint_di; | |
| 1193 | |
| 1194 // Whole-method sticky bits and flags | |
| 1195 public: | |
| 1196 enum { | |
| 3345 | 1197 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
| 0 | 1198 _trap_hist_mask = max_jubyte, |
| 1199 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
| 1200 }; // Public flag values | |
| 1201 private: | |
| 1202 uint _nof_decompiles; // count of all nmethod removals | |
| 1203 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
| 1204 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
| 1205 union { | |
| 1206 intptr_t _align; | |
| 1207 u1 _array[_trap_hist_limit]; | |
| 1208 } _trap_hist; | |
| 1209 | |
| 1210 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
| 1211 intx _eflags; // flags on escape information | |
| 1212 intx _arg_local; // bit set of non-escaping arguments | |
| 1213 intx _arg_stack; // bit set of stack-allocatable arguments | |
| 1214 intx _arg_returned; // bit set of returned arguments | |
| 1215 | |
| 1783 | 1216 int _creation_mileage; // method mileage at MDO creation |
| 1217 | |
| 1218 // How many invocations has this MDO seen? | |
| 1219 // These counters are used to determine the exact age of MDO. | |
| 1220 // We need those because in tiered a method can be concurrently | |
| 1221 // executed at different levels. | |
| 1222 InvocationCounter _invocation_counter; | |
| 1223 // Same for backedges. | |
| 1224 InvocationCounter _backedge_counter; | |
| 2252 | 1225 // Counter values at the time profiling started. |
| 1226 int _invocation_counter_start; | |
| 1227 int _backedge_counter_start; | |
| 1783 | 1228 // Number of loops and blocks is computed when compiling the first |
| 1229 // time with C1. It is used to determine if method is trivial. | |
| 1230 short _num_loops; | |
| 1231 short _num_blocks; | |
| 1232 // Highest compile level this method has ever seen. | |
| 1233 u1 _highest_comp_level; | |
| 1234 // Same for OSR level | |
| 1235 u1 _highest_osr_comp_level; | |
| 1236 // Does this method contain anything worth profiling? | |
| 1237 bool _would_profile; | |
| 0 | 1238 |
| 1239 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
| 1240 int _data_size; | |
| 1241 | |
| 1242 // Beginning of the data entries | |
| 1243 intptr_t _data[1]; | |
| 1244 | |
| 1245 // Helper for size computation | |
| 1246 static int compute_data_size(BytecodeStream* stream); | |
| 1247 static int bytecode_cell_count(Bytecodes::Code code); | |
| 1248 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
| 1249 | |
| 1250 // Helper for initialization | |
| 1251 DataLayout* data_layout_at(int data_index) { | |
| 1252 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); | |
| 1253 return (DataLayout*) (((address)_data) + data_index); | |
| 1254 } | |
| 1255 | |
| 1256 // Initialize an individual data segment. Returns the size of | |
| 1257 // the segment in bytes. | |
| 1258 int initialize_data(BytecodeStream* stream, int data_index); | |
| 1259 | |
| 1260 // Helper for data_at | |
| 1261 DataLayout* limit_data_position() { | |
| 1262 return (DataLayout*)((address)data_base() + _data_size); | |
| 1263 } | |
| 1264 bool out_of_bounds(int data_index) { | |
| 1265 return data_index >= data_size(); | |
| 1266 } | |
| 1267 | |
| 1268 // Give each of the data entries a chance to perform specific | |
| 1269 // data initialization. | |
| 1270 void post_initialize(BytecodeStream* stream); | |
| 1271 | |
| 1272 // hint accessors | |
| 1273 int hint_di() const { return _hint_di; } | |
| 1274 void set_hint_di(int di) { | |
| 1275 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
| 1276 _hint_di = di; | |
| 1277 } | |
| 1278 ProfileData* data_before(int bci) { | |
| 1279 // avoid SEGV on this edge case | |
| 1280 if (data_size() == 0) | |
| 1281 return NULL; | |
| 1282 int hint = hint_di(); | |
| 1283 if (data_layout_at(hint)->bci() <= bci) | |
| 1284 return data_at(hint); | |
| 1285 return first_data(); | |
| 1286 } | |
| 1287 | |
| 1288 // What is the index of the first data entry? | |
| 1289 int first_di() { return 0; } | |
| 1290 | |
| 1291 // Find or create an extra ProfileData: | |
| 1292 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
| 1293 | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1294 // return the argument info cell |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1295 ArgInfoData *arg_info(); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1296 |
| 0 | 1297 public: |
| 1298 static int header_size() { | |
| 1299 return sizeof(methodDataOopDesc)/wordSize; | |
| 1300 } | |
| 1301 | |
| 1302 // Compute the size of a methodDataOop before it is created. | |
| 1303 static int compute_allocation_size_in_bytes(methodHandle method); | |
| 1304 static int compute_allocation_size_in_words(methodHandle method); | |
| 1305 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
| 1306 | |
| 1307 // Determine if a given bytecode can have profile information. | |
| 1308 static bool bytecode_has_profile(Bytecodes::Code code) { | |
| 1309 return bytecode_cell_count(code) != no_profile_data; | |
| 1310 } | |
| 1311 | |
| 1312 // Perform initialization of a new methodDataOop | |
| 1313 void initialize(methodHandle method); | |
| 1314 | |
| 1315 // My size | |
| 1316 int object_size_in_bytes() { return _size; } | |
| 1317 int object_size() { | |
| 1318 return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); | |
| 1319 } | |
| 1320 | |
| 1321 int creation_mileage() const { return _creation_mileage; } | |
| 1322 void set_creation_mileage(int x) { _creation_mileage = x; } | |
| 1783 | 1323 |
| 1324 int invocation_count() { | |
| 1325 if (invocation_counter()->carry()) { | |
| 1326 return InvocationCounter::count_limit; | |
| 1327 } | |
| 1328 return invocation_counter()->count(); | |
| 1329 } | |
| 1330 int backedge_count() { | |
| 1331 if (backedge_counter()->carry()) { | |
| 1332 return InvocationCounter::count_limit; | |
| 1333 } | |
| 1334 return backedge_counter()->count(); | |
| 1335 } | |
| 1336 | |
| 2252 | 1337 int invocation_count_start() { |
| 1338 if (invocation_counter()->carry()) { | |
| 1339 return 0; | |
| 1340 } | |
| 1341 return _invocation_counter_start; | |
| 1342 } | |
| 1343 | |
| 1344 int backedge_count_start() { | |
| 1345 if (backedge_counter()->carry()) { | |
| 1346 return 0; | |
| 1347 } | |
| 1348 return _backedge_counter_start; | |
| 1349 } | |
| 1350 | |
| 1351 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
| 1352 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
| 1353 | |
| 1354 void reset_start_counters() { | |
| 1355 _invocation_counter_start = invocation_count(); | |
| 1356 _backedge_counter_start = backedge_count(); | |
| 1357 } | |
| 1358 | |
| 1783 | 1359 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
| 1360 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
| 1361 | |
| 1362 void set_would_profile(bool p) { _would_profile = p; } | |
| 1363 bool would_profile() const { return _would_profile; } | |
| 1364 | |
| 1365 int highest_comp_level() { return _highest_comp_level; } | |
| 1366 void set_highest_comp_level(int level) { _highest_comp_level = level; } | |
| 1367 int highest_osr_comp_level() { return _highest_osr_comp_level; } | |
| 1368 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } | |
| 1369 | |
| 1370 int num_loops() const { return _num_loops; } | |
| 1371 void set_num_loops(int n) { _num_loops = n; } | |
| 1372 int num_blocks() const { return _num_blocks; } | |
| 1373 void set_num_blocks(int n) { _num_blocks = n; } | |
| 1374 | |
| 0 | 1375 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
| 1376 static int mileage_of(methodOop m); | |
| 1377 | |
| 1378 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
| 1379 enum EscapeFlag { | |
| 1380 estimated = 1 << 0, | |
|
78
e1e86702e43e
6680665: bytecode Escape Analyzer produces incorrect escape information for methods without oop arguments
kvn
parents:
45
diff
changeset
|
1381 return_local = 1 << 1, |
|
e1e86702e43e
6680665: bytecode Escape Analyzer produces incorrect escape information for methods without oop arguments
kvn
parents:
45
diff
changeset
|
1382 return_allocated = 1 << 2, |
|
e1e86702e43e
6680665: bytecode Escape Analyzer produces incorrect escape information for methods without oop arguments
kvn
parents:
45
diff
changeset
|
1383 allocated_escapes = 1 << 3, |
|
e1e86702e43e
6680665: bytecode Escape Analyzer produces incorrect escape information for methods without oop arguments
kvn
parents:
45
diff
changeset
|
1384 unknown_modified = 1 << 4 |
| 0 | 1385 }; |
| 1386 | |
| 1387 intx eflags() { return _eflags; } | |
| 1388 intx arg_local() { return _arg_local; } | |
| 1389 intx arg_stack() { return _arg_stack; } | |
| 1390 intx arg_returned() { return _arg_returned; } | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1391 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1392 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1393 return aid->arg_modified(a); } |
| 0 | 1394 |
| 1395 void set_eflags(intx v) { _eflags = v; } | |
| 1396 void set_arg_local(intx v) { _arg_local = v; } | |
| 1397 void set_arg_stack(intx v) { _arg_stack = v; } | |
| 1398 void set_arg_returned(intx v) { _arg_returned = v; } | |
|
45
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1399 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1400 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1401 |
|
48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
kvn
parents:
0
diff
changeset
|
1402 aid->set_arg_modified(a, v); } |
| 0 | 1403 |
| 1404 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
| 1405 | |
| 1406 // Location and size of data area | |
| 1407 address data_base() const { | |
| 1408 return (address) _data; | |
| 1409 } | |
| 1410 int data_size() { | |
| 1411 return _data_size; | |
| 1412 } | |
| 1413 | |
| 1414 // Accessors | |
| 1415 methodOop method() { return _method; } | |
| 1416 | |
| 1417 // Get the data at an arbitrary (sort of) data index. | |
| 1418 ProfileData* data_at(int data_index); | |
| 1419 | |
| 1420 // Walk through the data in order. | |
| 1421 ProfileData* first_data() { return data_at(first_di()); } | |
| 1422 ProfileData* next_data(ProfileData* current); | |
| 1423 bool is_valid(ProfileData* current) { return current != NULL; } | |
| 1424 | |
| 1425 // Convert a dp (data pointer) to a di (data index). | |
| 1426 int dp_to_di(address dp) { | |
| 1427 return dp - ((address)_data); | |
| 1428 } | |
| 1429 | |
| 1430 address di_to_dp(int di) { | |
| 1431 return (address)data_layout_at(di); | |
| 1432 } | |
| 1433 | |
| 1434 // bci to di/dp conversion. | |
| 1435 address bci_to_dp(int bci); | |
| 1436 int bci_to_di(int bci) { | |
| 1437 return dp_to_di(bci_to_dp(bci)); | |
| 1438 } | |
| 1439 | |
| 1440 // Get the data at an arbitrary bci, or NULL if there is none. | |
| 1441 ProfileData* bci_to_data(int bci); | |
| 1442 | |
| 1443 // Same, but try to create an extra_data record if one is needed: | |
| 1444 ProfileData* allocate_bci_to_data(int bci) { | |
| 1445 ProfileData* data = bci_to_data(bci); | |
| 1446 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
| 1447 } | |
| 1448 | |
| 1449 // Add a handful of extra data records, for trap tracking. | |
| 1450 DataLayout* extra_data_base() { return limit_data_position(); } | |
| 1451 DataLayout* extra_data_limit() { return (DataLayout*)((address)this + object_size_in_bytes()); } | |
| 1452 int extra_data_size() { return (address)extra_data_limit() | |
| 1453 - (address)extra_data_base(); } | |
| 1454 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
| 1455 | |
| 1456 // Return (uint)-1 for overflow. | |
| 1457 uint trap_count(int reason) const { | |
| 1458 assert((uint)reason < _trap_hist_limit, "oob"); | |
| 1459 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
| 1460 } | |
| 1461 // For loops: | |
| 1462 static uint trap_reason_limit() { return _trap_hist_limit; } | |
| 1463 static uint trap_count_limit() { return _trap_hist_mask; } | |
| 1464 uint inc_trap_count(int reason) { | |
| 1465 // Count another trap, anywhere in this method. | |
| 1466 assert(reason >= 0, "must be single trap"); | |
| 1467 if ((uint)reason < _trap_hist_limit) { | |
| 1468 uint cnt1 = 1 + _trap_hist._array[reason]; | |
| 1469 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
| 1470 _trap_hist._array[reason] = cnt1; | |
| 1471 return cnt1; | |
| 1472 } else { | |
| 1473 return _trap_hist_mask + (++_nof_overflow_traps); | |
| 1474 } | |
| 1475 } else { | |
| 1476 // Could not represent the count in the histogram. | |
| 1477 return (++_nof_overflow_traps); | |
| 1478 } | |
| 1479 } | |
| 1480 | |
| 1481 uint overflow_trap_count() const { | |
| 1482 return _nof_overflow_traps; | |
| 1483 } | |
| 1484 uint overflow_recompile_count() const { | |
| 1485 return _nof_overflow_recompiles; | |
| 1486 } | |
| 1487 void inc_overflow_recompile_count() { | |
| 1488 _nof_overflow_recompiles += 1; | |
| 1489 } | |
| 1490 uint decompile_count() const { | |
| 1491 return _nof_decompiles; | |
| 1492 } | |
| 1493 void inc_decompile_count() { | |
| 1494 _nof_decompiles += 1; | |
|
1206
87684f1a88b5
6614597: Performance variability in jvm2008 xml.validation
kvn
parents:
948
diff
changeset
|
1495 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
| 1783 | 1496 method()->set_not_compilable(CompLevel_full_optimization); |
|
1206
87684f1a88b5
6614597: Performance variability in jvm2008 xml.validation
kvn
parents:
948
diff
changeset
|
1497 } |
| 0 | 1498 } |
| 1499 | |
| 1500 // Support for code generation | |
| 1501 static ByteSize data_offset() { | |
| 1502 return byte_offset_of(methodDataOopDesc, _data[0]); | |
| 1503 } | |
| 1504 | |
| 1783 | 1505 static ByteSize invocation_counter_offset() { |
| 1506 return byte_offset_of(methodDataOopDesc, _invocation_counter); | |
| 1507 } | |
| 1508 static ByteSize backedge_counter_offset() { | |
| 1509 return byte_offset_of(methodDataOopDesc, _backedge_counter); | |
| 1510 } | |
| 1511 | |
| 0 | 1512 // GC support |
| 1513 oop* adr_method() const { return (oop*)&_method; } | |
| 1514 bool object_is_parsable() const { return _size != 0; } | |
| 1515 void set_object_is_parsable(int object_size_in_bytes) { _size = object_size_in_bytes; } | |
| 1516 | |
| 1517 #ifndef PRODUCT | |
| 1518 // printing support for method data | |
| 1519 void print_data_on(outputStream* st); | |
| 1520 #endif | |
| 1521 | |
| 1522 // verification | |
| 1523 void verify_data_on(outputStream* st); | |
| 1524 }; | |
| 1972 | 1525 |
| 1526 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |