Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.hpp @ 20457:631667807de7
8058184: Move _highest_comp_level and _highest_osr_comp_level from MethodData to MethodCounters
Summary: Tiered policy requires highest compilation levels always available
Reviewed-by: kvn, vlivanov
| author | iveresov |
|---|---|
| date | Thu, 11 Sep 2014 12:18:26 -0700 |
| parents | f6f9aec27858 |
| children | 600c44255e5f |
| 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 { | |
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75 friend class VMStructs; |
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76 |
| 0 | 77 private: |
| 78 // Every data layout begins with a header. This header | |
| 79 // contains a tag, which is used to indicate the size/layout | |
| 80 // of the data, 4 bits of flags, which can be used in any way, | |
| 81 // 4 bits of trap history (none/one reason/many reasons), | |
| 82 // and a bci, which is used to tie this piece of data to a | |
| 83 // specific bci in the bytecodes. | |
| 84 union { | |
| 85 intptr_t _bits; | |
| 86 struct { | |
| 87 u1 _tag; | |
| 88 u1 _flags; | |
| 89 u2 _bci; | |
| 90 } _struct; | |
| 91 } _header; | |
| 92 | |
| 93 // The data layout has an arbitrary number of cells, each sized | |
| 94 // to accomodate a pointer or an integer. | |
| 95 intptr_t _cells[1]; | |
| 96 | |
| 97 // Some types of data layouts need a length field. | |
| 98 static bool needs_array_len(u1 tag); | |
| 99 | |
| 100 public: | |
| 101 enum { | |
| 102 counter_increment = 1 | |
| 103 }; | |
| 104 | |
| 105 enum { | |
| 106 cell_size = sizeof(intptr_t) | |
| 107 }; | |
| 108 | |
| 109 // Tag values | |
| 110 enum { | |
| 111 no_tag, | |
| 112 bit_data_tag, | |
| 113 counter_data_tag, | |
| 114 jump_data_tag, | |
| 115 receiver_type_data_tag, | |
| 116 virtual_call_data_tag, | |
| 117 ret_data_tag, | |
| 118 branch_data_tag, | |
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119 multi_branch_data_tag, |
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120 arg_info_data_tag, |
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121 call_type_data_tag, |
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122 virtual_call_type_data_tag, |
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123 parameters_type_data_tag, |
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124 speculative_trap_data_tag |
| 0 | 125 }; |
| 126 | |
| 127 enum { | |
| 128 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
| 129 // The trap state breaks down further as [recompile:1 | reason:3]. | |
| 130 // This further breakdown is defined in deoptimization.cpp. | |
| 131 // See Deoptimization::trap_state_reason for an assert that | |
| 132 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
| 133 // | |
| 134 // The trap_state is collected only if ProfileTraps is true. | |
| 135 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
| 136 trap_shift = BitsPerByte - trap_bits, | |
| 137 trap_mask = right_n_bits(trap_bits), | |
| 138 trap_mask_in_place = (trap_mask << trap_shift), | |
| 139 flag_limit = trap_shift, | |
| 140 flag_mask = right_n_bits(flag_limit), | |
| 141 first_flag = 0 | |
| 142 }; | |
| 143 | |
| 144 // Size computation | |
| 145 static int header_size_in_bytes() { | |
| 146 return cell_size; | |
| 147 } | |
| 148 static int header_size_in_cells() { | |
| 149 return 1; | |
| 150 } | |
| 151 | |
| 152 static int compute_size_in_bytes(int cell_count) { | |
| 153 return header_size_in_bytes() + cell_count * cell_size; | |
| 154 } | |
| 155 | |
| 156 // Initialization | |
| 157 void initialize(u1 tag, u2 bci, int cell_count); | |
| 158 | |
| 159 // Accessors | |
| 160 u1 tag() { | |
| 161 return _header._struct._tag; | |
| 162 } | |
| 163 | |
| 164 // Return a few bits of trap state. Range is [0..trap_mask]. | |
| 165 // The state tells if traps with zero, one, or many reasons have occurred. | |
| 166 // It also tells whether zero or many recompilations have occurred. | |
| 167 // The associated trap histogram in the MDO itself tells whether | |
| 168 // traps are common or not. If a BCI shows that a trap X has | |
| 169 // occurred, and the MDO shows N occurrences of X, we make the | |
| 170 // simplifying assumption that all N occurrences can be blamed | |
| 171 // on that BCI. | |
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172 int trap_state() const { |
| 0 | 173 return ((_header._struct._flags >> trap_shift) & trap_mask); |
| 174 } | |
| 175 | |
| 176 void set_trap_state(int new_state) { | |
| 177 assert(ProfileTraps, "used only under +ProfileTraps"); | |
| 178 uint old_flags = (_header._struct._flags & flag_mask); | |
| 179 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
| 180 } | |
| 181 | |
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182 u1 flags() const { |
| 0 | 183 return _header._struct._flags; |
| 184 } | |
| 185 | |
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186 u2 bci() const { |
| 0 | 187 return _header._struct._bci; |
| 188 } | |
| 189 | |
| 190 void set_header(intptr_t value) { | |
| 191 _header._bits = value; | |
| 192 } | |
| 193 intptr_t header() { | |
| 194 return _header._bits; | |
| 195 } | |
| 196 void set_cell_at(int index, intptr_t value) { | |
| 197 _cells[index] = value; | |
| 198 } | |
| 199 void release_set_cell_at(int index, intptr_t value) { | |
| 200 OrderAccess::release_store_ptr(&_cells[index], value); | |
| 201 } | |
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202 intptr_t cell_at(int index) const { |
| 0 | 203 return _cells[index]; |
| 204 } | |
| 205 | |
| 206 void set_flag_at(int flag_number) { | |
| 207 assert(flag_number < flag_limit, "oob"); | |
| 208 _header._struct._flags |= (0x1 << flag_number); | |
| 209 } | |
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210 bool flag_at(int flag_number) const { |
| 0 | 211 assert(flag_number < flag_limit, "oob"); |
| 212 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
| 213 } | |
| 214 | |
| 215 // Low-level support for code generation. | |
| 216 static ByteSize header_offset() { | |
| 217 return byte_offset_of(DataLayout, _header); | |
| 218 } | |
| 219 static ByteSize tag_offset() { | |
| 220 return byte_offset_of(DataLayout, _header._struct._tag); | |
| 221 } | |
| 222 static ByteSize flags_offset() { | |
| 223 return byte_offset_of(DataLayout, _header._struct._flags); | |
| 224 } | |
| 225 static ByteSize bci_offset() { | |
| 226 return byte_offset_of(DataLayout, _header._struct._bci); | |
| 227 } | |
| 228 static ByteSize cell_offset(int index) { | |
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229 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
| 0 | 230 } |
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231 #ifdef CC_INTERP |
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232 static int cell_offset_in_bytes(int index) { |
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233 return (int)offset_of(DataLayout, _cells[index]); |
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234 } |
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235 #endif // CC_INTERP |
| 0 | 236 // Return a value which, when or-ed as a byte into _flags, sets the flag. |
| 237 static int flag_number_to_byte_constant(int flag_number) { | |
| 238 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
| 239 DataLayout temp; temp.set_header(0); | |
| 240 temp.set_flag_at(flag_number); | |
| 241 return temp._header._struct._flags; | |
| 242 } | |
| 243 // Return a value which, when or-ed as a word into _header, sets the flag. | |
| 244 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
| 245 DataLayout temp; temp.set_header(0); | |
| 246 temp._header._struct._flags = byte_constant; | |
| 247 return temp._header._bits; | |
| 248 } | |
| 941 | 249 |
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250 ProfileData* data_in(); |
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251 |
| 941 | 252 // GC support |
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253 void clean_weak_klass_links(BoolObjectClosure* cl); |
| 0 | 254 }; |
| 255 | |
| 256 | |
| 257 // ProfileData class hierarchy | |
| 258 class ProfileData; | |
| 259 class BitData; | |
| 260 class CounterData; | |
| 261 class ReceiverTypeData; | |
| 262 class VirtualCallData; | |
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263 class VirtualCallTypeData; |
| 0 | 264 class RetData; |
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265 class CallTypeData; |
| 0 | 266 class JumpData; |
| 267 class BranchData; | |
| 268 class ArrayData; | |
| 269 class MultiBranchData; | |
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270 class ArgInfoData; |
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271 class ParametersTypeData; |
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272 class SpeculativeTrapData; |
| 0 | 273 |
| 274 // ProfileData | |
| 275 // | |
| 276 // A ProfileData object is created to refer to a section of profiling | |
| 277 // data in a structured way. | |
| 278 class ProfileData : public ResourceObj { | |
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279 friend class TypeEntries; |
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280 friend class ReturnTypeEntry; |
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281 friend class TypeStackSlotEntries; |
| 0 | 282 private: |
| 283 #ifndef PRODUCT | |
| 284 enum { | |
| 285 tab_width_one = 16, | |
| 286 tab_width_two = 36 | |
| 287 }; | |
| 288 #endif // !PRODUCT | |
| 289 | |
| 290 // This is a pointer to a section of profiling data. | |
| 291 DataLayout* _data; | |
| 292 | |
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293 char* print_data_on_helper(const MethodData* md) const; |
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294 |
| 0 | 295 protected: |
| 296 DataLayout* data() { return _data; } | |
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297 const DataLayout* data() const { return _data; } |
| 0 | 298 |
| 299 enum { | |
| 300 cell_size = DataLayout::cell_size | |
| 301 }; | |
| 302 | |
| 303 public: | |
| 304 // How many cells are in this? | |
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305 virtual int cell_count() const { |
| 0 | 306 ShouldNotReachHere(); |
| 307 return -1; | |
| 308 } | |
| 309 | |
| 310 // Return the size of this data. | |
| 311 int size_in_bytes() { | |
| 312 return DataLayout::compute_size_in_bytes(cell_count()); | |
| 313 } | |
| 314 | |
| 315 protected: | |
| 316 // Low-level accessors for underlying data | |
| 317 void set_intptr_at(int index, intptr_t value) { | |
| 318 assert(0 <= index && index < cell_count(), "oob"); | |
| 319 data()->set_cell_at(index, value); | |
| 320 } | |
| 321 void release_set_intptr_at(int index, intptr_t value) { | |
| 322 assert(0 <= index && index < cell_count(), "oob"); | |
| 323 data()->release_set_cell_at(index, value); | |
| 324 } | |
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325 intptr_t intptr_at(int index) const { |
| 0 | 326 assert(0 <= index && index < cell_count(), "oob"); |
| 327 return data()->cell_at(index); | |
| 328 } | |
| 329 void set_uint_at(int index, uint value) { | |
| 330 set_intptr_at(index, (intptr_t) value); | |
| 331 } | |
| 332 void release_set_uint_at(int index, uint value) { | |
| 333 release_set_intptr_at(index, (intptr_t) value); | |
| 334 } | |
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335 uint uint_at(int index) const { |
| 0 | 336 return (uint)intptr_at(index); |
| 337 } | |
| 338 void set_int_at(int index, int value) { | |
| 339 set_intptr_at(index, (intptr_t) value); | |
| 340 } | |
| 341 void release_set_int_at(int index, int value) { | |
| 342 release_set_intptr_at(index, (intptr_t) value); | |
| 343 } | |
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344 int int_at(int index) const { |
| 0 | 345 return (int)intptr_at(index); |
| 346 } | |
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347 int int_at_unchecked(int index) const { |
| 0 | 348 return (int)data()->cell_at(index); |
| 349 } | |
| 350 void set_oop_at(int index, oop value) { | |
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351 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
| 0 | 352 } |
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353 oop oop_at(int index) const { |
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354 return cast_to_oop(intptr_at(index)); |
| 0 | 355 } |
| 356 | |
| 357 void set_flag_at(int flag_number) { | |
| 358 data()->set_flag_at(flag_number); | |
| 359 } | |
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360 bool flag_at(int flag_number) const { |
| 0 | 361 return data()->flag_at(flag_number); |
| 362 } | |
| 363 | |
| 364 // two convenient imports for use by subclasses: | |
| 365 static ByteSize cell_offset(int index) { | |
| 366 return DataLayout::cell_offset(index); | |
| 367 } | |
| 368 static int flag_number_to_byte_constant(int flag_number) { | |
| 369 return DataLayout::flag_number_to_byte_constant(flag_number); | |
| 370 } | |
| 371 | |
| 372 ProfileData(DataLayout* data) { | |
| 373 _data = data; | |
| 374 } | |
| 375 | |
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376 #ifdef CC_INTERP |
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377 // Static low level accessors for DataLayout with ProfileData's semantics. |
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378 |
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379 static int cell_offset_in_bytes(int index) { |
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380 return DataLayout::cell_offset_in_bytes(index); |
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381 } |
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382 |
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383 static void increment_uint_at_no_overflow(DataLayout* layout, int index, |
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384 int inc = DataLayout::counter_increment) { |
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385 uint count = ((uint)layout->cell_at(index)) + inc; |
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386 if (count == 0) return; |
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387 layout->set_cell_at(index, (intptr_t) count); |
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388 } |
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389 |
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390 static int int_at(DataLayout* layout, int index) { |
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391 return (int)layout->cell_at(index); |
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392 } |
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393 |
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394 static int uint_at(DataLayout* layout, int index) { |
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395 return (uint)layout->cell_at(index); |
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396 } |
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397 |
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398 static oop oop_at(DataLayout* layout, int index) { |
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399 return cast_to_oop(layout->cell_at(index)); |
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400 } |
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401 |
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402 static void set_intptr_at(DataLayout* layout, int index, intptr_t value) { |
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403 layout->set_cell_at(index, (intptr_t) value); |
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404 } |
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405 |
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406 static void set_flag_at(DataLayout* layout, int flag_number) { |
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407 layout->set_flag_at(flag_number); |
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408 } |
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409 #endif // CC_INTERP |
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410 |
| 0 | 411 public: |
| 412 // Constructor for invalid ProfileData. | |
| 413 ProfileData(); | |
| 414 | |
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415 u2 bci() const { |
| 0 | 416 return data()->bci(); |
| 417 } | |
| 418 | |
| 419 address dp() { | |
| 420 return (address)_data; | |
| 421 } | |
| 422 | |
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423 int trap_state() const { |
| 0 | 424 return data()->trap_state(); |
| 425 } | |
| 426 void set_trap_state(int new_state) { | |
| 427 data()->set_trap_state(new_state); | |
| 428 } | |
| 429 | |
| 430 // Type checking | |
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431 virtual bool is_BitData() const { return false; } |
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432 virtual bool is_CounterData() const { return false; } |
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433 virtual bool is_JumpData() const { return false; } |
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434 virtual bool is_ReceiverTypeData()const { return false; } |
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435 virtual bool is_VirtualCallData() const { return false; } |
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436 virtual bool is_RetData() const { return false; } |
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437 virtual bool is_BranchData() const { return false; } |
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438 virtual bool is_ArrayData() const { return false; } |
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439 virtual bool is_MultiBranchData() const { return false; } |
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440 virtual bool is_ArgInfoData() const { return false; } |
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441 virtual bool is_CallTypeData() const { return false; } |
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442 virtual bool is_VirtualCallTypeData()const { return false; } |
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443 virtual bool is_ParametersTypeData() const { return false; } |
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444 virtual bool is_SpeculativeTrapData()const { return false; } |
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45
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445 |
| 0 | 446 |
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447 BitData* as_BitData() const { |
| 0 | 448 assert(is_BitData(), "wrong type"); |
| 449 return is_BitData() ? (BitData*) this : NULL; | |
| 450 } | |
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451 CounterData* as_CounterData() const { |
| 0 | 452 assert(is_CounterData(), "wrong type"); |
| 453 return is_CounterData() ? (CounterData*) this : NULL; | |
| 454 } | |
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455 JumpData* as_JumpData() const { |
| 0 | 456 assert(is_JumpData(), "wrong type"); |
| 457 return is_JumpData() ? (JumpData*) this : NULL; | |
| 458 } | |
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459 ReceiverTypeData* as_ReceiverTypeData() const { |
| 0 | 460 assert(is_ReceiverTypeData(), "wrong type"); |
| 461 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
| 462 } | |
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463 VirtualCallData* as_VirtualCallData() const { |
| 0 | 464 assert(is_VirtualCallData(), "wrong type"); |
| 465 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
| 466 } | |
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467 RetData* as_RetData() const { |
| 0 | 468 assert(is_RetData(), "wrong type"); |
| 469 return is_RetData() ? (RetData*) this : NULL; | |
| 470 } | |
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471 BranchData* as_BranchData() const { |
| 0 | 472 assert(is_BranchData(), "wrong type"); |
| 473 return is_BranchData() ? (BranchData*) this : NULL; | |
| 474 } | |
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475 ArrayData* as_ArrayData() const { |
| 0 | 476 assert(is_ArrayData(), "wrong type"); |
| 477 return is_ArrayData() ? (ArrayData*) this : NULL; | |
| 478 } | |
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479 MultiBranchData* as_MultiBranchData() const { |
| 0 | 480 assert(is_MultiBranchData(), "wrong type"); |
| 481 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
| 482 } | |
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483 ArgInfoData* as_ArgInfoData() const { |
|
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484 assert(is_ArgInfoData(), "wrong type"); |
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485 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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486 } |
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487 CallTypeData* as_CallTypeData() const { |
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488 assert(is_CallTypeData(), "wrong type"); |
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489 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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490 } |
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491 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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492 assert(is_VirtualCallTypeData(), "wrong type"); |
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493 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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494 } |
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495 ParametersTypeData* as_ParametersTypeData() const { |
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496 assert(is_ParametersTypeData(), "wrong type"); |
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497 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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498 } |
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499 SpeculativeTrapData* as_SpeculativeTrapData() const { |
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500 assert(is_SpeculativeTrapData(), "wrong type"); |
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501 return is_SpeculativeTrapData() ? (SpeculativeTrapData*)this : NULL; |
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502 } |
| 0 | 503 |
| 504 | |
| 505 // Subclass specific initialization | |
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506 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
| 0 | 507 |
| 508 // GC support | |
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509 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
| 0 | 510 |
| 511 // CI translation: ProfileData can represent both MethodDataOop data | |
| 512 // as well as CIMethodData data. This function is provided for translating | |
| 513 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
| 514 // most ProfileData don't require any translation, so we provide the null | |
| 515 // translation here, and the required translators are in the ci subclasses. | |
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516 virtual void translate_from(const ProfileData* data) {} |
| 0 | 517 |
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518 virtual void print_data_on(outputStream* st, const char* extra = NULL) const { |
| 0 | 519 ShouldNotReachHere(); |
| 520 } | |
| 521 | |
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522 void print_data_on(outputStream* st, const MethodData* md) const; |
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523 |
| 0 | 524 #ifndef PRODUCT |
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525 void print_shared(outputStream* st, const char* name, const char* extra) const; |
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526 void tab(outputStream* st, bool first = false) const; |
| 0 | 527 #endif |
| 528 }; | |
| 529 | |
| 530 // BitData | |
| 531 // | |
| 532 // A BitData holds a flag or two in its header. | |
| 533 class BitData : public ProfileData { | |
| 534 protected: | |
| 535 enum { | |
| 536 // null_seen: | |
| 537 // saw a null operand (cast/aastore/instanceof) | |
| 538 null_seen_flag = DataLayout::first_flag + 0 | |
| 539 }; | |
| 540 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
| 541 public: | |
| 542 BitData(DataLayout* layout) : ProfileData(layout) { | |
| 543 } | |
| 544 | |
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545 virtual bool is_BitData() const { return true; } |
| 0 | 546 |
| 547 static int static_cell_count() { | |
| 548 return bit_cell_count; | |
| 549 } | |
| 550 | |
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551 virtual int cell_count() const { |
| 0 | 552 return static_cell_count(); |
| 553 } | |
| 554 | |
| 555 // Accessor | |
| 556 | |
| 557 // The null_seen flag bit is specially known to the interpreter. | |
| 558 // Consulting it allows the compiler to avoid setting up null_check traps. | |
| 559 bool null_seen() { return flag_at(null_seen_flag); } | |
| 560 void set_null_seen() { set_flag_at(null_seen_flag); } | |
| 561 | |
| 562 | |
| 563 // Code generation support | |
| 564 static int null_seen_byte_constant() { | |
| 565 return flag_number_to_byte_constant(null_seen_flag); | |
| 566 } | |
| 567 | |
| 568 static ByteSize bit_data_size() { | |
| 569 return cell_offset(bit_cell_count); | |
| 570 } | |
| 571 | |
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572 #ifdef CC_INTERP |
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573 static int bit_data_size_in_bytes() { |
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574 return cell_offset_in_bytes(bit_cell_count); |
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575 } |
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576 |
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577 static void set_null_seen(DataLayout* layout) { |
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578 set_flag_at(layout, null_seen_flag); |
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579 } |
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580 |
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581 static DataLayout* advance(DataLayout* layout) { |
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582 return (DataLayout*) (((address)layout) + (ssize_t)BitData::bit_data_size_in_bytes()); |
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583 } |
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584 #endif // CC_INTERP |
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585 |
| 0 | 586 #ifndef PRODUCT |
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587 void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 588 #endif |
| 589 }; | |
| 590 | |
| 591 // CounterData | |
| 592 // | |
| 593 // A CounterData corresponds to a simple counter. | |
| 594 class CounterData : public BitData { | |
| 595 protected: | |
| 596 enum { | |
| 597 count_off, | |
| 598 counter_cell_count | |
| 599 }; | |
| 600 public: | |
| 601 CounterData(DataLayout* layout) : BitData(layout) {} | |
| 602 | |
|
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603 virtual bool is_CounterData() const { return true; } |
| 0 | 604 |
| 605 static int static_cell_count() { | |
| 606 return counter_cell_count; | |
| 607 } | |
| 608 | |
|
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609 virtual int cell_count() const { |
| 0 | 610 return static_cell_count(); |
| 611 } | |
| 612 | |
| 613 // Direct accessor | |
|
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614 uint count() const { |
| 0 | 615 return uint_at(count_off); |
| 616 } | |
| 617 | |
| 618 // Code generation support | |
| 619 static ByteSize count_offset() { | |
| 620 return cell_offset(count_off); | |
| 621 } | |
| 622 static ByteSize counter_data_size() { | |
| 623 return cell_offset(counter_cell_count); | |
| 624 } | |
| 625 | |
|
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626 void set_count(uint count) { |
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627 set_uint_at(count_off, count); |
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628 } |
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629 |
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630 #ifdef CC_INTERP |
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631 static int counter_data_size_in_bytes() { |
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632 return cell_offset_in_bytes(counter_cell_count); |
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633 } |
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634 |
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635 static void increment_count_no_overflow(DataLayout* layout) { |
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636 increment_uint_at_no_overflow(layout, count_off); |
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637 } |
|
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638 |
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639 // Support counter decrementation at checkcast / subtype check failed. |
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640 static void decrement_count(DataLayout* layout) { |
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641 increment_uint_at_no_overflow(layout, count_off, -1); |
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642 } |
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643 |
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644 static DataLayout* advance(DataLayout* layout) { |
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645 return (DataLayout*) (((address)layout) + (ssize_t)CounterData::counter_data_size_in_bytes()); |
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646 } |
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647 #endif // CC_INTERP |
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648 |
| 0 | 649 #ifndef PRODUCT |
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650 void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 651 #endif |
| 652 }; | |
| 653 | |
| 654 // JumpData | |
| 655 // | |
| 656 // A JumpData is used to access profiling information for a direct | |
| 657 // branch. It is a counter, used for counting the number of branches, | |
| 658 // plus a data displacement, used for realigning the data pointer to | |
| 659 // the corresponding target bci. | |
| 660 class JumpData : public ProfileData { | |
| 661 protected: | |
| 662 enum { | |
| 663 taken_off_set, | |
| 664 displacement_off_set, | |
| 665 jump_cell_count | |
| 666 }; | |
| 667 | |
| 668 void set_displacement(int displacement) { | |
| 669 set_int_at(displacement_off_set, displacement); | |
| 670 } | |
| 671 | |
| 672 public: | |
| 673 JumpData(DataLayout* layout) : ProfileData(layout) { | |
| 674 assert(layout->tag() == DataLayout::jump_data_tag || | |
| 675 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
| 676 } | |
| 677 | |
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678 virtual bool is_JumpData() const { return true; } |
| 0 | 679 |
| 680 static int static_cell_count() { | |
| 681 return jump_cell_count; | |
| 682 } | |
| 683 | |
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684 virtual int cell_count() const { |
| 0 | 685 return static_cell_count(); |
| 686 } | |
| 687 | |
| 688 // Direct accessor | |
|
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689 uint taken() const { |
| 0 | 690 return uint_at(taken_off_set); |
| 691 } | |
|
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692 |
|
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693 void set_taken(uint cnt) { |
|
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694 set_uint_at(taken_off_set, cnt); |
|
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695 } |
|
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696 |
| 0 | 697 // Saturating counter |
| 698 uint inc_taken() { | |
| 699 uint cnt = taken() + 1; | |
| 700 // Did we wrap? Will compiler screw us?? | |
| 701 if (cnt == 0) cnt--; | |
| 702 set_uint_at(taken_off_set, cnt); | |
| 703 return cnt; | |
| 704 } | |
| 705 | |
|
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706 int displacement() const { |
| 0 | 707 return int_at(displacement_off_set); |
| 708 } | |
| 709 | |
| 710 // Code generation support | |
| 711 static ByteSize taken_offset() { | |
| 712 return cell_offset(taken_off_set); | |
| 713 } | |
| 714 | |
| 715 static ByteSize displacement_offset() { | |
| 716 return cell_offset(displacement_off_set); | |
| 717 } | |
| 718 | |
|
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719 #ifdef CC_INTERP |
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720 static void increment_taken_count_no_overflow(DataLayout* layout) { |
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721 increment_uint_at_no_overflow(layout, taken_off_set); |
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722 } |
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723 |
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724 static DataLayout* advance_taken(DataLayout* layout) { |
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725 return (DataLayout*) (((address)layout) + (ssize_t)int_at(layout, displacement_off_set)); |
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726 } |
|
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727 |
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728 static uint taken_count(DataLayout* layout) { |
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729 return (uint) uint_at(layout, taken_off_set); |
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730 } |
|
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731 #endif // CC_INTERP |
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732 |
| 0 | 733 // Specific initialization. |
|
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734 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 735 |
| 736 #ifndef PRODUCT | |
|
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737 void print_data_on(outputStream* st, const char* extra = NULL) const; |
|
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738 #endif |
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739 }; |
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740 |
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741 // Entries in a ProfileData object to record types: it can either be |
|
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742 // none (no profile), unknown (conflicting profile data) or a klass if |
|
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743 // a single one is seen. Whether a null reference was seen is also |
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744 // recorded. No counter is associated with the type and a single type |
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745 // is tracked (unlike VirtualCallData). |
|
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746 class TypeEntries { |
|
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747 |
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748 public: |
|
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749 |
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750 // A single cell is used to record information for a type: |
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751 // - the cell is initialized to 0 |
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752 // - when a type is discovered it is stored in the cell |
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753 // - bit zero of the cell is used to record whether a null reference |
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754 // was encountered or not |
|
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755 // - bit 1 is set to record a conflict in the type information |
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|
756 |
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757 enum { |
|
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758 null_seen = 1, |
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759 type_mask = ~null_seen, |
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760 type_unknown = 2, |
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761 status_bits = null_seen | type_unknown, |
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762 type_klass_mask = ~status_bits |
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763 }; |
|
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|
764 |
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765 // what to initialize a cell to |
|
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766 static intptr_t type_none() { |
|
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767 return 0; |
|
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|
768 } |
|
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|
769 |
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770 // null seen = bit 0 set? |
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771 static bool was_null_seen(intptr_t v) { |
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772 return (v & null_seen) != 0; |
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|
773 } |
|
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|
774 |
|
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775 // conflicting type information = bit 1 set? |
|
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776 static bool is_type_unknown(intptr_t v) { |
|
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777 return (v & type_unknown) != 0; |
|
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|
778 } |
|
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|
779 |
|
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780 // not type information yet = all bits cleared, ignoring bit 0? |
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781 static bool is_type_none(intptr_t v) { |
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782 return (v & type_mask) == 0; |
|
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|
783 } |
|
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|
784 |
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785 // recorded type: cell without bit 0 and 1 |
|
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|
786 static intptr_t klass_part(intptr_t v) { |
|
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787 intptr_t r = v & type_klass_mask; |
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|
788 return r; |
|
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|
789 } |
|
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|
790 |
|
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|
791 // type recorded |
|
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792 static Klass* valid_klass(intptr_t k) { |
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793 if (!is_type_none(k) && |
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794 !is_type_unknown(k)) { |
| 13080 | 795 Klass* res = (Klass*)klass_part(k); |
| 796 assert(res != NULL, "invalid"); | |
| 797 return res; | |
|
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798 } else { |
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799 return NULL; |
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800 } |
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801 } |
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802 |
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803 static intptr_t with_status(intptr_t k, intptr_t in) { |
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804 return k | (in & status_bits); |
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805 } |
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806 |
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807 static intptr_t with_status(Klass* k, intptr_t in) { |
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808 return with_status((intptr_t)k, in); |
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809 } |
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810 |
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811 #ifndef PRODUCT |
|
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812 static void print_klass(outputStream* st, intptr_t k); |
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813 #endif |
|
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814 |
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815 // GC support |
|
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816 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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817 |
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818 protected: |
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819 // ProfileData object these entries are part of |
|
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820 ProfileData* _pd; |
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821 // offset within the ProfileData object where the entries start |
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822 const int _base_off; |
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823 |
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824 TypeEntries(int base_off) |
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825 : _base_off(base_off), _pd(NULL) {} |
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826 |
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827 void set_intptr_at(int index, intptr_t value) { |
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828 _pd->set_intptr_at(index, value); |
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829 } |
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830 |
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831 intptr_t intptr_at(int index) const { |
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832 return _pd->intptr_at(index); |
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833 } |
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834 |
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835 public: |
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836 void set_profile_data(ProfileData* pd) { |
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837 _pd = pd; |
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838 } |
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839 }; |
|
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840 |
|
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841 // Type entries used for arguments passed at a call and parameters on |
|
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842 // method entry. 2 cells per entry: one for the type encoded as in |
|
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843 // TypeEntries and one initialized with the stack slot where the |
|
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844 // profiled object is to be found so that the interpreter can locate |
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845 // it quickly. |
|
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846 class TypeStackSlotEntries : public TypeEntries { |
|
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|
847 |
|
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848 private: |
|
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849 enum { |
|
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850 stack_slot_entry, |
|
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851 type_entry, |
|
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852 per_arg_cell_count |
|
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853 }; |
|
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854 |
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855 // offset of cell for stack slot for entry i within ProfileData object |
|
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856 int stack_slot_offset(int i) const { |
|
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857 return _base_off + stack_slot_local_offset(i); |
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858 } |
|
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859 |
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860 protected: |
|
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861 const int _number_of_entries; |
|
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862 |
|
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863 // offset of cell for type for entry i within ProfileData object |
|
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864 int type_offset(int i) const { |
|
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865 return _base_off + type_local_offset(i); |
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866 } |
|
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|
867 |
|
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868 public: |
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869 |
|
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870 TypeStackSlotEntries(int base_off, int nb_entries) |
|
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871 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
|
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872 |
|
12962
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873 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
|
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874 |
|
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|
875 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
|
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876 |
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877 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
|
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878 static int stack_slot_local_offset(int i) { |
|
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879 return i * per_arg_cell_count + stack_slot_entry; |
|
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880 } |
|
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|
881 |
|
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882 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
|
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883 static int type_local_offset(int i) { |
|
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884 return i * per_arg_cell_count + type_entry; |
|
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885 } |
|
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|
886 |
|
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887 // stack slot for entry i |
|
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888 uint stack_slot(int i) const { |
|
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889 assert(i >= 0 && i < _number_of_entries, "oob"); |
|
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890 return _pd->uint_at(stack_slot_offset(i)); |
|
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891 } |
|
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892 |
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893 // set stack slot for entry i |
|
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894 void set_stack_slot(int i, uint num) { |
|
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895 assert(i >= 0 && i < _number_of_entries, "oob"); |
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896 _pd->set_uint_at(stack_slot_offset(i), num); |
|
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897 } |
|
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|
898 |
|
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899 // type for entry i |
|
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900 intptr_t type(int i) const { |
|
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901 assert(i >= 0 && i < _number_of_entries, "oob"); |
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902 return _pd->intptr_at(type_offset(i)); |
|
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903 } |
|
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904 |
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905 // set type for entry i |
|
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906 void set_type(int i, intptr_t k) { |
|
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907 assert(i >= 0 && i < _number_of_entries, "oob"); |
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908 _pd->set_intptr_at(type_offset(i), k); |
|
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909 } |
|
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|
910 |
|
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911 static ByteSize per_arg_size() { |
|
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|
912 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
|
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913 } |
|
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|
914 |
|
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915 static int per_arg_count() { |
|
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|
916 return per_arg_cell_count ; |
|
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|
917 } |
|
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|
918 |
|
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919 // GC support |
|
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920 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
921 |
|
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|
922 #ifndef PRODUCT |
|
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|
923 void print_data_on(outputStream* st) const; |
|
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924 #endif |
|
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925 }; |
|
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926 |
|
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927 // Type entry used for return from a call. A single cell to record the |
|
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928 // type. |
|
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929 class ReturnTypeEntry : public TypeEntries { |
|
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930 |
|
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931 private: |
|
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|
932 enum { |
|
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933 cell_count = 1 |
|
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934 }; |
|
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|
935 |
|
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936 public: |
|
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937 ReturnTypeEntry(int base_off) |
|
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938 : TypeEntries(base_off) {} |
|
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939 |
|
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940 void post_initialize() { |
|
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941 set_type(type_none()); |
|
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942 } |
|
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943 |
|
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944 intptr_t type() const { |
|
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945 return _pd->intptr_at(_base_off); |
|
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946 } |
|
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947 |
|
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948 void set_type(intptr_t k) { |
|
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949 _pd->set_intptr_at(_base_off, k); |
|
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950 } |
|
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951 |
|
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952 static int static_cell_count() { |
|
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953 return cell_count; |
|
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|
954 } |
|
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|
955 |
|
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956 static ByteSize size() { |
|
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957 return in_ByteSize(cell_count * DataLayout::cell_size); |
|
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958 } |
|
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959 |
|
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960 ByteSize type_offset() { |
|
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961 return DataLayout::cell_offset(_base_off); |
|
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962 } |
|
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963 |
|
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|
964 // GC support |
|
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965 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
|
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|
966 |
|
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967 #ifndef PRODUCT |
|
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968 void print_data_on(outputStream* st) const; |
|
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969 #endif |
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970 }; |
|
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|
971 |
|
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972 // Entries to collect type information at a call: contains arguments |
|
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973 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
|
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974 // number of cells. Because the number of cells for the return type is |
|
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975 // smaller than the number of cells for the type of an arguments, the |
|
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976 // number of cells is used to tell how many arguments are profiled and |
|
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977 // whether a return value is profiled. See has_arguments() and |
|
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978 // has_return(). |
|
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979 class TypeEntriesAtCall { |
|
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980 private: |
|
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981 static int stack_slot_local_offset(int i) { |
|
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982 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
|
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983 } |
|
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|
984 |
|
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985 static int argument_type_local_offset(int i) { |
|
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986 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
|
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987 } |
|
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|
988 |
|
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|
989 public: |
|
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|
990 |
|
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991 static int header_cell_count() { |
|
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992 return 1; |
|
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|
993 } |
|
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|
994 |
|
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|
995 static int cell_count_local_offset() { |
|
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996 return 0; |
|
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|
997 } |
|
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|
998 |
|
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999 static int compute_cell_count(BytecodeStream* stream); |
|
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1000 |
|
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1001 static void initialize(DataLayout* dl, int base, int cell_count) { |
|
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1002 int off = base + cell_count_local_offset(); |
|
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1003 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
|
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1004 } |
|
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|
1005 |
|
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1006 static bool arguments_profiling_enabled(); |
|
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1007 static bool return_profiling_enabled(); |
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1008 |
|
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1009 // Code generation support |
|
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1010 static ByteSize cell_count_offset() { |
|
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1011 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
|
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1012 } |
|
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|
1013 |
|
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1014 static ByteSize args_data_offset() { |
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1015 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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1016 } |
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1017 |
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1018 static ByteSize stack_slot_offset(int i) { |
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1019 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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1020 } |
|
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1021 |
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1022 static ByteSize argument_type_offset(int i) { |
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1023 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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1024 } |
|
17900
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1025 |
|
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1026 static ByteSize return_only_size() { |
|
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1027 return ReturnTypeEntry::size() + in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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1028 } |
|
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|
1029 |
|
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1030 }; |
|
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1031 |
|
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1032 // CallTypeData |
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1033 // |
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1034 // A CallTypeData is used to access profiling information about a non |
|
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1035 // virtual call for which we collect type information about arguments |
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1036 // and return value. |
|
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1037 class CallTypeData : public CounterData { |
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1038 private: |
|
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1039 // entries for arguments if any |
|
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1040 TypeStackSlotEntries _args; |
|
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1041 // entry for return type if any |
|
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1042 ReturnTypeEntry _ret; |
|
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1043 |
|
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1044 int cell_count_global_offset() const { |
|
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1045 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1046 } |
|
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1047 |
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1048 // number of cells not counting the header |
|
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1049 int cell_count_no_header() const { |
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1050 return uint_at(cell_count_global_offset()); |
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1051 } |
|
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1052 |
|
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1053 void check_number_of_arguments(int total) { |
|
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1054 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1055 } |
|
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1056 |
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1057 public: |
|
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1058 CallTypeData(DataLayout* layout) : |
|
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1059 CounterData(layout), |
|
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1060 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
|
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1061 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1062 { |
|
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1063 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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1064 // Some compilers (VC++) don't want this passed in member initialization list |
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1065 _args.set_profile_data(this); |
|
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1066 _ret.set_profile_data(this); |
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1067 } |
|
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1068 |
|
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1069 const TypeStackSlotEntries* args() const { |
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1070 assert(has_arguments(), "no profiling of arguments"); |
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1071 return &_args; |
|
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1072 } |
|
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1073 |
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1074 const ReturnTypeEntry* ret() const { |
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1075 assert(has_return(), "no profiling of return value"); |
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1076 return &_ret; |
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1077 } |
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1078 |
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1079 virtual bool is_CallTypeData() const { return true; } |
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1080 |
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1081 static int static_cell_count() { |
|
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1082 return -1; |
|
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1083 } |
|
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1084 |
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1085 static int compute_cell_count(BytecodeStream* stream) { |
|
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1086 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1087 } |
|
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1088 |
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1089 static void initialize(DataLayout* dl, int cell_count) { |
|
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1090 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
|
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1091 } |
|
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1092 |
|
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1093 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1094 |
|
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1095 virtual int cell_count() const { |
|
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1096 return CounterData::static_cell_count() + |
|
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1097 TypeEntriesAtCall::header_cell_count() + |
|
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1098 int_at_unchecked(cell_count_global_offset()); |
|
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1099 } |
|
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1100 |
|
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1101 int number_of_arguments() const { |
|
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1102 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1103 } |
|
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1104 |
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1105 void set_argument_type(int i, Klass* k) { |
|
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1106 assert(has_arguments(), "no arguments!"); |
|
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1107 intptr_t current = _args.type(i); |
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1108 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1109 } |
|
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1110 |
|
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1111 void set_return_type(Klass* k) { |
|
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1112 assert(has_return(), "no return!"); |
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1113 intptr_t current = _ret.type(); |
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1114 _ret.set_type(TypeEntries::with_status(k, current)); |
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1115 } |
|
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1116 |
|
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1117 // An entry for a return value takes less space than an entry for an |
|
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1118 // argument so if the number of cells exceeds the number of cells |
|
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1119 // needed for an argument, this object contains type information for |
|
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1120 // at least one argument. |
|
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1121 bool has_arguments() const { |
|
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1122 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
|
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1123 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
|
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1124 return res; |
|
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1125 } |
|
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1126 |
|
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1127 // An entry for a return value takes less space than an entry for an |
|
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1128 // argument, so if the remainder of the number of cells divided by |
|
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1129 // the number of cells for an argument is not null, a return value |
|
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1130 // is profiled in this object. |
|
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1131 bool has_return() const { |
|
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1132 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
|
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1133 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
|
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1134 return res; |
|
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1135 } |
|
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1136 |
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1137 // Code generation support |
|
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1138 static ByteSize args_data_offset() { |
|
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1139 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
|
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1140 } |
|
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1141 |
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1142 // GC support |
|
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1143 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
|
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1144 if (has_arguments()) { |
|
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1145 _args.clean_weak_klass_links(is_alive_closure); |
|
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1146 } |
|
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1147 if (has_return()) { |
|
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1148 _ret.clean_weak_klass_links(is_alive_closure); |
|
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1149 } |
|
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1150 } |
|
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1151 |
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1152 #ifndef PRODUCT |
|
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1153 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 1154 #endif |
| 1155 }; | |
| 1156 | |
| 1157 // ReceiverTypeData | |
| 1158 // | |
| 1159 // A ReceiverTypeData is used to access profiling information about a | |
| 1160 // dynamic type check. It consists of a counter which counts the total times | |
|
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1161 // that the check is reached, and a series of (Klass*, count) pairs |
| 0 | 1162 // which are used to store a type profile for the receiver of the check. |
| 1163 class ReceiverTypeData : public CounterData { | |
| 1164 protected: | |
| 1165 enum { | |
| 1166 receiver0_offset = counter_cell_count, | |
| 1167 count0_offset, | |
| 1168 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
| 1169 }; | |
| 1170 | |
| 1171 public: | |
| 1172 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
| 1173 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
|
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1174 layout->tag() == DataLayout::virtual_call_data_tag || |
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1175 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
| 0 | 1176 } |
| 1177 | |
|
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1178 virtual bool is_ReceiverTypeData() const { return true; } |
| 0 | 1179 |
| 1180 static int static_cell_count() { | |
| 1181 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
| 1182 } | |
| 1183 | |
|
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1184 virtual int cell_count() const { |
| 0 | 1185 return static_cell_count(); |
| 1186 } | |
| 1187 | |
| 1188 // Direct accessors | |
| 1189 static uint row_limit() { | |
| 1190 return TypeProfileWidth; | |
| 1191 } | |
| 1192 static int receiver_cell_index(uint row) { | |
| 1193 return receiver0_offset + row * receiver_type_row_cell_count; | |
| 1194 } | |
| 1195 static int receiver_count_cell_index(uint row) { | |
| 1196 return count0_offset + row * receiver_type_row_cell_count; | |
| 1197 } | |
| 1198 | |
|
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1199 Klass* receiver(uint row) const { |
| 0 | 1200 assert(row < row_limit(), "oob"); |
| 1201 | |
|
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1202 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1203 assert(recv == NULL || recv->is_klass(), "wrong type"); |
| 0 | 1204 return recv; |
| 1205 } | |
| 1206 | |
|
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1207 void set_receiver(uint row, Klass* k) { |
| 941 | 1208 assert((uint)row < row_limit(), "oob"); |
|
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1209 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
| 941 | 1210 } |
| 1211 | |
|
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1212 uint receiver_count(uint row) const { |
| 0 | 1213 assert(row < row_limit(), "oob"); |
| 1214 return uint_at(receiver_count_cell_index(row)); | |
| 1215 } | |
| 1216 | |
| 941 | 1217 void set_receiver_count(uint row, uint count) { |
| 1218 assert(row < row_limit(), "oob"); | |
| 1219 set_uint_at(receiver_count_cell_index(row), count); | |
| 1220 } | |
| 1221 | |
| 1222 void clear_row(uint row) { | |
| 1223 assert(row < row_limit(), "oob"); | |
|
1251
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1224 // Clear total count - indicator of polymorphic call site. |
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1225 // The site may look like as monomorphic after that but |
|
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1226 // it allow to have more accurate profiling information because |
|
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1227 // there was execution phase change since klasses were unloaded. |
|
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1228 // If the site is still polymorphic then MDO will be updated |
|
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1229 // to reflect it. But it could be the case that the site becomes |
|
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1230 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1231 // Even if we use monomorphic (when it is not) for compilation |
|
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1232 // we will only have trap, deoptimization and recompile again |
|
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1233 // with updated MDO after executing method in Interpreter. |
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1234 // An additional receiver will be recorded in the cleaned row |
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1235 // during next call execution. |
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1236 // |
|
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1237 // Note: our profiling logic works with empty rows in any slot. |
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1238 // We do sorting a profiling info (ciCallProfile) for compilation. |
|
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1239 // |
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1240 set_count(0); |
| 941 | 1241 set_receiver(row, NULL); |
| 1242 set_receiver_count(row, 0); | |
| 1243 } | |
| 1244 | |
| 0 | 1245 // Code generation support |
| 1246 static ByteSize receiver_offset(uint row) { | |
| 1247 return cell_offset(receiver_cell_index(row)); | |
| 1248 } | |
| 1249 static ByteSize receiver_count_offset(uint row) { | |
| 1250 return cell_offset(receiver_count_cell_index(row)); | |
| 1251 } | |
| 1252 static ByteSize receiver_type_data_size() { | |
| 1253 return cell_offset(static_cell_count()); | |
| 1254 } | |
| 1255 | |
| 1256 // GC support | |
|
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1257 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
| 0 | 1258 |
|
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1259 #ifdef CC_INTERP |
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1260 static int receiver_type_data_size_in_bytes() { |
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1261 return cell_offset_in_bytes(static_cell_count()); |
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1262 } |
|
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1263 |
|
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1264 static Klass *receiver_unchecked(DataLayout* layout, uint row) { |
|
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1265 Klass* recv = (Klass*)layout->cell_at(receiver_cell_index(row)); |
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1266 return recv; |
|
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1267 } |
|
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1268 |
|
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1269 static void increment_receiver_count_no_overflow(DataLayout* layout, Klass *rcvr) { |
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1270 const int num_rows = row_limit(); |
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1271 // Receiver already exists? |
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1272 for (int row = 0; row < num_rows; row++) { |
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1273 if (receiver_unchecked(layout, row) == rcvr) { |
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1274 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1275 return; |
|
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1276 } |
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1277 } |
|
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1278 // New receiver, find a free slot. |
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1279 for (int row = 0; row < num_rows; row++) { |
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1280 if (receiver_unchecked(layout, row) == NULL) { |
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1281 set_intptr_at(layout, receiver_cell_index(row), (intptr_t)rcvr); |
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1282 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1283 return; |
|
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1284 } |
|
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1285 } |
|
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1286 // Receiver did not match any saved receiver and there is no empty row for it. |
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1287 // Increment total counter to indicate polymorphic case. |
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1288 increment_count_no_overflow(layout); |
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1289 } |
|
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1290 |
|
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1291 static DataLayout* advance(DataLayout* layout) { |
|
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1292 return (DataLayout*) (((address)layout) + (ssize_t)ReceiverTypeData::receiver_type_data_size_in_bytes()); |
|
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1293 } |
|
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1294 #endif // CC_INTERP |
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1295 |
| 0 | 1296 #ifndef PRODUCT |
|
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1297 void print_receiver_data_on(outputStream* st) const; |
|
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1298 void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 1299 #endif |
| 1300 }; | |
| 1301 | |
| 1302 // VirtualCallData | |
| 1303 // | |
| 1304 // A VirtualCallData is used to access profiling information about a | |
| 1305 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
| 1306 class VirtualCallData : public ReceiverTypeData { | |
| 1307 public: | |
| 1308 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
|
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1309 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1310 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
| 0 | 1311 } |
| 1312 | |
|
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1313 virtual bool is_VirtualCallData() const { return true; } |
| 0 | 1314 |
| 1315 static int static_cell_count() { | |
| 1316 // At this point we could add more profile state, e.g., for arguments. | |
| 1317 // But for now it's the same size as the base record type. | |
| 1318 return ReceiverTypeData::static_cell_count(); | |
| 1319 } | |
| 1320 | |
|
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1321 virtual int cell_count() const { |
| 0 | 1322 return static_cell_count(); |
| 1323 } | |
| 1324 | |
| 1325 // Direct accessors | |
| 1326 static ByteSize virtual_call_data_size() { | |
| 1327 return cell_offset(static_cell_count()); | |
| 1328 } | |
| 1329 | |
|
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1330 #ifdef CC_INTERP |
|
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1331 static int virtual_call_data_size_in_bytes() { |
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1332 return cell_offset_in_bytes(static_cell_count()); |
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1333 } |
|
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|
1334 |
|
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|
1335 static DataLayout* advance(DataLayout* layout) { |
|
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1336 return (DataLayout*) (((address)layout) + (ssize_t)VirtualCallData::virtual_call_data_size_in_bytes()); |
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1337 } |
|
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1338 #endif // CC_INTERP |
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1339 |
| 0 | 1340 #ifndef PRODUCT |
|
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1341 void print_data_on(outputStream* st, const char* extra = NULL) const; |
|
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1342 #endif |
|
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1343 }; |
|
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1344 |
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1345 // VirtualCallTypeData |
|
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1346 // |
|
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1347 // A VirtualCallTypeData is used to access profiling information about |
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1348 // a virtual call for which we collect type information about |
|
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1349 // arguments and return value. |
|
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1350 class VirtualCallTypeData : public VirtualCallData { |
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1351 private: |
|
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1352 // entries for arguments if any |
|
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1353 TypeStackSlotEntries _args; |
|
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1354 // entry for return type if any |
|
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1355 ReturnTypeEntry _ret; |
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1356 |
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1357 int cell_count_global_offset() const { |
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1358 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1359 } |
|
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1360 |
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1361 // number of cells not counting the header |
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1362 int cell_count_no_header() const { |
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1363 return uint_at(cell_count_global_offset()); |
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1364 } |
|
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1365 |
|
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1366 void check_number_of_arguments(int total) { |
|
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1367 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
|
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1368 } |
|
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1369 |
|
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1370 public: |
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1371 VirtualCallTypeData(DataLayout* layout) : |
|
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1372 VirtualCallData(layout), |
|
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1373 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
|
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1374 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1375 { |
|
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1376 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
|
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1377 // Some compilers (VC++) don't want this passed in member initialization list |
|
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1378 _args.set_profile_data(this); |
|
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1379 _ret.set_profile_data(this); |
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1380 } |
|
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1381 |
|
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1382 const TypeStackSlotEntries* args() const { |
|
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1383 assert(has_arguments(), "no profiling of arguments"); |
|
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1384 return &_args; |
|
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1385 } |
|
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1386 |
|
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1387 const ReturnTypeEntry* ret() const { |
|
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1388 assert(has_return(), "no profiling of return value"); |
|
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1389 return &_ret; |
|
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1390 } |
|
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1391 |
|
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1392 virtual bool is_VirtualCallTypeData() const { return true; } |
|
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1393 |
|
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1394 static int static_cell_count() { |
|
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1395 return -1; |
|
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1396 } |
|
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1397 |
|
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1398 static int compute_cell_count(BytecodeStream* stream) { |
|
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1399 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
|
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1400 } |
|
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1401 |
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1402 static void initialize(DataLayout* dl, int cell_count) { |
|
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1403 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
|
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1404 } |
|
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1405 |
|
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1406 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
|
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1407 |
|
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1408 virtual int cell_count() const { |
|
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1409 return VirtualCallData::static_cell_count() + |
|
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1410 TypeEntriesAtCall::header_cell_count() + |
|
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1411 int_at_unchecked(cell_count_global_offset()); |
|
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1412 } |
|
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1413 |
|
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1414 int number_of_arguments() const { |
|
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1415 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
|
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1416 } |
|
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1417 |
|
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1418 void set_argument_type(int i, Klass* k) { |
|
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1419 assert(has_arguments(), "no arguments!"); |
|
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1420 intptr_t current = _args.type(i); |
|
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1421 _args.set_type(i, TypeEntries::with_status(k, current)); |
|
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1422 } |
|
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1423 |
|
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1424 void set_return_type(Klass* k) { |
|
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1425 assert(has_return(), "no return!"); |
|
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1426 intptr_t current = _ret.type(); |
|
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1427 _ret.set_type(TypeEntries::with_status(k, current)); |
|
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1428 } |
|
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1429 |
|
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1430 // An entry for a return value takes less space than an entry for an |
|
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1431 // argument, so if the remainder of the number of cells divided by |
|
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1432 // the number of cells for an argument is not null, a return value |
|
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1433 // is profiled in this object. |
|
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1434 bool has_return() const { |
|
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1435 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
|
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1436 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
|
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1437 return res; |
|
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1438 } |
|
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1439 |
|
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1440 // An entry for a return value takes less space than an entry for an |
|
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1441 // argument so if the number of cells exceeds the number of cells |
|
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1442 // needed for an argument, this object contains type information for |
|
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1443 // at least one argument. |
|
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1444 bool has_arguments() const { |
|
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1445 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
|
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1446 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
|
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1447 return res; |
|
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1448 } |
|
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1449 |
|
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1450 // Code generation support |
|
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1451 static ByteSize args_data_offset() { |
|
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1452 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
|
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1453 } |
|
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1454 |
|
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1455 // GC support |
|
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1456 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
|
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1457 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
|
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1458 if (has_arguments()) { |
|
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1459 _args.clean_weak_klass_links(is_alive_closure); |
|
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1460 } |
|
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1461 if (has_return()) { |
|
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1462 _ret.clean_weak_klass_links(is_alive_closure); |
|
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1463 } |
|
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1464 } |
|
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1465 |
|
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1466 #ifndef PRODUCT |
|
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1467 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 1468 #endif |
| 1469 }; | |
| 1470 | |
| 1471 // RetData | |
| 1472 // | |
| 1473 // A RetData is used to access profiling information for a ret bytecode. | |
| 1474 // It is composed of a count of the number of times that the ret has | |
| 1475 // been executed, followed by a series of triples of the form | |
| 1476 // (bci, count, di) which count the number of times that some bci was the | |
| 1477 // target of the ret and cache a corresponding data displacement. | |
| 1478 class RetData : public CounterData { | |
| 1479 protected: | |
| 1480 enum { | |
| 1481 bci0_offset = counter_cell_count, | |
| 1482 count0_offset, | |
| 1483 displacement0_offset, | |
| 1484 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
| 1485 }; | |
| 1486 | |
| 1487 void set_bci(uint row, int bci) { | |
| 1488 assert((uint)row < row_limit(), "oob"); | |
| 1489 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
| 1490 } | |
| 1491 void release_set_bci(uint row, int bci) { | |
| 1492 assert((uint)row < row_limit(), "oob"); | |
| 1493 // 'release' when setting the bci acts as a valid flag for other | |
| 1494 // threads wrt bci_count and bci_displacement. | |
| 1495 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
| 1496 } | |
| 1497 void set_bci_count(uint row, uint count) { | |
| 1498 assert((uint)row < row_limit(), "oob"); | |
| 1499 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
| 1500 } | |
| 1501 void set_bci_displacement(uint row, int disp) { | |
| 1502 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
| 1503 } | |
| 1504 | |
| 1505 public: | |
| 1506 RetData(DataLayout* layout) : CounterData(layout) { | |
| 1507 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
| 1508 } | |
| 1509 | |
|
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1510 virtual bool is_RetData() const { return true; } |
| 0 | 1511 |
| 1512 enum { | |
| 1513 no_bci = -1 // value of bci when bci1/2 are not in use. | |
| 1514 }; | |
| 1515 | |
| 1516 static int static_cell_count() { | |
| 1517 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
| 1518 } | |
| 1519 | |
|
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1520 virtual int cell_count() const { |
| 0 | 1521 return static_cell_count(); |
| 1522 } | |
| 1523 | |
| 1524 static uint row_limit() { | |
| 1525 return BciProfileWidth; | |
| 1526 } | |
| 1527 static int bci_cell_index(uint row) { | |
| 1528 return bci0_offset + row * ret_row_cell_count; | |
| 1529 } | |
| 1530 static int bci_count_cell_index(uint row) { | |
| 1531 return count0_offset + row * ret_row_cell_count; | |
| 1532 } | |
| 1533 static int bci_displacement_cell_index(uint row) { | |
| 1534 return displacement0_offset + row * ret_row_cell_count; | |
| 1535 } | |
| 1536 | |
| 1537 // Direct accessors | |
|
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1538 int bci(uint row) const { |
| 0 | 1539 return int_at(bci_cell_index(row)); |
| 1540 } | |
|
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1541 uint bci_count(uint row) const { |
| 0 | 1542 return uint_at(bci_count_cell_index(row)); |
| 1543 } | |
|
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1544 int bci_displacement(uint row) const { |
| 0 | 1545 return int_at(bci_displacement_cell_index(row)); |
| 1546 } | |
| 1547 | |
| 1548 // Interpreter Runtime support | |
|
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1549 address fixup_ret(int return_bci, MethodData* mdo); |
| 0 | 1550 |
| 1551 // Code generation support | |
| 1552 static ByteSize bci_offset(uint row) { | |
| 1553 return cell_offset(bci_cell_index(row)); | |
| 1554 } | |
| 1555 static ByteSize bci_count_offset(uint row) { | |
| 1556 return cell_offset(bci_count_cell_index(row)); | |
| 1557 } | |
| 1558 static ByteSize bci_displacement_offset(uint row) { | |
| 1559 return cell_offset(bci_displacement_cell_index(row)); | |
| 1560 } | |
| 1561 | |
|
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1562 #ifdef CC_INTERP |
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1563 static DataLayout* advance(MethodData *md, int bci); |
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1564 #endif // CC_INTERP |
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1565 |
| 0 | 1566 // Specific initialization. |
|
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1567 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 1568 |
| 1569 #ifndef PRODUCT | |
|
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1570 void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 1571 #endif |
| 1572 }; | |
| 1573 | |
| 1574 // BranchData | |
| 1575 // | |
| 1576 // A BranchData is used to access profiling data for a two-way branch. | |
| 1577 // It consists of taken and not_taken counts as well as a data displacement | |
| 1578 // for the taken case. | |
| 1579 class BranchData : public JumpData { | |
| 1580 protected: | |
| 1581 enum { | |
| 1582 not_taken_off_set = jump_cell_count, | |
| 1583 branch_cell_count | |
| 1584 }; | |
| 1585 | |
| 1586 void set_displacement(int displacement) { | |
| 1587 set_int_at(displacement_off_set, displacement); | |
| 1588 } | |
| 1589 | |
| 1590 public: | |
| 1591 BranchData(DataLayout* layout) : JumpData(layout) { | |
| 1592 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
| 1593 } | |
| 1594 | |
|
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1595 virtual bool is_BranchData() const { return true; } |
| 0 | 1596 |
| 1597 static int static_cell_count() { | |
| 1598 return branch_cell_count; | |
| 1599 } | |
| 1600 | |
|
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1601 virtual int cell_count() const { |
| 0 | 1602 return static_cell_count(); |
| 1603 } | |
| 1604 | |
| 1605 // Direct accessor | |
|
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1606 uint not_taken() const { |
| 0 | 1607 return uint_at(not_taken_off_set); |
| 1608 } | |
| 1609 | |
|
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1610 void set_not_taken(uint cnt) { |
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1611 set_uint_at(not_taken_off_set, cnt); |
|
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1612 } |
|
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1613 |
| 0 | 1614 uint inc_not_taken() { |
| 1615 uint cnt = not_taken() + 1; | |
| 1616 // Did we wrap? Will compiler screw us?? | |
| 1617 if (cnt == 0) cnt--; | |
| 1618 set_uint_at(not_taken_off_set, cnt); | |
| 1619 return cnt; | |
| 1620 } | |
| 1621 | |
| 1622 // Code generation support | |
| 1623 static ByteSize not_taken_offset() { | |
| 1624 return cell_offset(not_taken_off_set); | |
| 1625 } | |
| 1626 static ByteSize branch_data_size() { | |
| 1627 return cell_offset(branch_cell_count); | |
| 1628 } | |
| 1629 | |
|
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1630 #ifdef CC_INTERP |
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1631 static int branch_data_size_in_bytes() { |
|
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1632 return cell_offset_in_bytes(branch_cell_count); |
|
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1633 } |
|
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1634 |
|
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1635 static void increment_not_taken_count_no_overflow(DataLayout* layout) { |
|
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1636 increment_uint_at_no_overflow(layout, not_taken_off_set); |
|
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1637 } |
|
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1638 |
|
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1639 static DataLayout* advance_not_taken(DataLayout* layout) { |
|
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1640 return (DataLayout*) (((address)layout) + (ssize_t)BranchData::branch_data_size_in_bytes()); |
|
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1641 } |
|
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1642 #endif // CC_INTERP |
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1643 |
| 0 | 1644 // Specific initialization. |
|
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1645 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 1646 |
| 1647 #ifndef PRODUCT | |
|
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1648 void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 1649 #endif |
| 1650 }; | |
| 1651 | |
| 1652 // ArrayData | |
| 1653 // | |
| 1654 // A ArrayData is a base class for accessing profiling data which does | |
| 1655 // not have a statically known size. It consists of an array length | |
| 1656 // and an array start. | |
| 1657 class ArrayData : public ProfileData { | |
| 1658 protected: | |
| 1659 friend class DataLayout; | |
| 1660 | |
| 1661 enum { | |
| 1662 array_len_off_set, | |
| 1663 array_start_off_set | |
| 1664 }; | |
| 1665 | |
|
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1666 uint array_uint_at(int index) const { |
| 0 | 1667 int aindex = index + array_start_off_set; |
| 1668 return uint_at(aindex); | |
| 1669 } | |
|
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1670 int array_int_at(int index) const { |
| 0 | 1671 int aindex = index + array_start_off_set; |
| 1672 return int_at(aindex); | |
| 1673 } | |
|
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1674 oop array_oop_at(int index) const { |
| 0 | 1675 int aindex = index + array_start_off_set; |
| 1676 return oop_at(aindex); | |
| 1677 } | |
| 1678 void array_set_int_at(int index, int value) { | |
| 1679 int aindex = index + array_start_off_set; | |
| 1680 set_int_at(aindex, value); | |
| 1681 } | |
| 1682 | |
|
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1683 #ifdef CC_INTERP |
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1684 // Static low level accessors for DataLayout with ArrayData's semantics. |
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1685 |
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1686 static void increment_array_uint_at_no_overflow(DataLayout* layout, int index) { |
|
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1687 int aindex = index + array_start_off_set; |
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1688 increment_uint_at_no_overflow(layout, aindex); |
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1689 } |
|
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1690 |
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1691 static int array_int_at(DataLayout* layout, int index) { |
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1692 int aindex = index + array_start_off_set; |
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1693 return int_at(layout, aindex); |
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1694 } |
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1695 #endif // CC_INTERP |
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1696 |
| 0 | 1697 // Code generation support for subclasses. |
| 1698 static ByteSize array_element_offset(int index) { | |
| 1699 return cell_offset(array_start_off_set + index); | |
| 1700 } | |
| 1701 | |
| 1702 public: | |
| 1703 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
| 1704 | |
|
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1705 virtual bool is_ArrayData() const { return true; } |
| 0 | 1706 |
| 1707 static int static_cell_count() { | |
| 1708 return -1; | |
| 1709 } | |
| 1710 | |
|
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1711 int array_len() const { |
| 0 | 1712 return int_at_unchecked(array_len_off_set); |
| 1713 } | |
| 1714 | |
|
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1715 virtual int cell_count() const { |
| 0 | 1716 return array_len() + 1; |
| 1717 } | |
| 1718 | |
| 1719 // Code generation support | |
| 1720 static ByteSize array_len_offset() { | |
| 1721 return cell_offset(array_len_off_set); | |
| 1722 } | |
| 1723 static ByteSize array_start_offset() { | |
| 1724 return cell_offset(array_start_off_set); | |
| 1725 } | |
| 1726 }; | |
| 1727 | |
| 1728 // MultiBranchData | |
| 1729 // | |
| 1730 // A MultiBranchData is used to access profiling information for | |
| 1731 // a multi-way branch (*switch bytecodes). It consists of a series | |
| 1732 // of (count, displacement) pairs, which count the number of times each | |
| 1733 // case was taken and specify the data displacment for each branch target. | |
| 1734 class MultiBranchData : public ArrayData { | |
| 1735 protected: | |
| 1736 enum { | |
| 1737 default_count_off_set, | |
| 1738 default_disaplacement_off_set, | |
| 1739 case_array_start | |
| 1740 }; | |
| 1741 enum { | |
| 1742 relative_count_off_set, | |
| 1743 relative_displacement_off_set, | |
| 1744 per_case_cell_count | |
| 1745 }; | |
| 1746 | |
| 1747 void set_default_displacement(int displacement) { | |
| 1748 array_set_int_at(default_disaplacement_off_set, displacement); | |
| 1749 } | |
| 1750 void set_displacement_at(int index, int displacement) { | |
| 1751 array_set_int_at(case_array_start + | |
| 1752 index * per_case_cell_count + | |
| 1753 relative_displacement_off_set, | |
| 1754 displacement); | |
| 1755 } | |
| 1756 | |
| 1757 public: | |
| 1758 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
| 1759 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
| 1760 } | |
| 1761 | |
|
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1762 virtual bool is_MultiBranchData() const { return true; } |
| 0 | 1763 |
| 1764 static int compute_cell_count(BytecodeStream* stream); | |
| 1765 | |
|
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1766 int number_of_cases() const { |
| 0 | 1767 int alen = array_len() - 2; // get rid of default case here. |
| 1768 assert(alen % per_case_cell_count == 0, "must be even"); | |
| 1769 return (alen / per_case_cell_count); | |
| 1770 } | |
| 1771 | |
|
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1772 uint default_count() const { |
| 0 | 1773 return array_uint_at(default_count_off_set); |
| 1774 } | |
|
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1775 int default_displacement() const { |
| 0 | 1776 return array_int_at(default_disaplacement_off_set); |
| 1777 } | |
| 1778 | |
|
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1779 uint count_at(int index) const { |
| 0 | 1780 return array_uint_at(case_array_start + |
| 1781 index * per_case_cell_count + | |
| 1782 relative_count_off_set); | |
| 1783 } | |
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1784 int displacement_at(int index) const { |
| 0 | 1785 return array_int_at(case_array_start + |
| 1786 index * per_case_cell_count + | |
| 1787 relative_displacement_off_set); | |
| 1788 } | |
| 1789 | |
| 1790 // Code generation support | |
| 1791 static ByteSize default_count_offset() { | |
| 1792 return array_element_offset(default_count_off_set); | |
| 1793 } | |
| 1794 static ByteSize default_displacement_offset() { | |
| 1795 return array_element_offset(default_disaplacement_off_set); | |
| 1796 } | |
| 1797 static ByteSize case_count_offset(int index) { | |
| 1798 return case_array_offset() + | |
| 1799 (per_case_size() * index) + | |
| 1800 relative_count_offset(); | |
| 1801 } | |
| 1802 static ByteSize case_array_offset() { | |
| 1803 return array_element_offset(case_array_start); | |
| 1804 } | |
| 1805 static ByteSize per_case_size() { | |
| 1806 return in_ByteSize(per_case_cell_count) * cell_size; | |
| 1807 } | |
| 1808 static ByteSize relative_count_offset() { | |
| 1809 return in_ByteSize(relative_count_off_set) * cell_size; | |
| 1810 } | |
| 1811 static ByteSize relative_displacement_offset() { | |
| 1812 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
| 1813 } | |
| 1814 | |
|
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1815 #ifdef CC_INTERP |
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1816 static void increment_count_no_overflow(DataLayout* layout, int index) { |
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1817 if (index == -1) { |
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1818 increment_array_uint_at_no_overflow(layout, default_count_off_set); |
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1819 } else { |
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1820 increment_array_uint_at_no_overflow(layout, case_array_start + |
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1821 index * per_case_cell_count + |
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1822 relative_count_off_set); |
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1823 } |
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1824 } |
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1825 |
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1826 static DataLayout* advance(DataLayout* layout, int index) { |
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1827 if (index == -1) { |
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1828 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, default_disaplacement_off_set)); |
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1829 } else { |
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1830 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, case_array_start + |
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1831 index * per_case_cell_count + |
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1832 relative_displacement_off_set)); |
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1833 } |
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1834 } |
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1835 #endif // CC_INTERP |
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1836 |
| 0 | 1837 // Specific initialization. |
|
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1838 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
| 0 | 1839 |
| 1840 #ifndef PRODUCT | |
|
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1841 void print_data_on(outputStream* st, const char* extra = NULL) const; |
| 0 | 1842 #endif |
| 1843 }; | |
| 1844 | |
|
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1845 class ArgInfoData : public ArrayData { |
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1846 |
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1847 public: |
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1848 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1849 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
|
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1850 } |
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1851 |
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1852 virtual bool is_ArgInfoData() const { return true; } |
|
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1853 |
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1854 |
|
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|
1855 int number_of_args() const { |
|
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1856 return array_len(); |
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|
1857 } |
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|
1858 |
|
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|
1859 uint arg_modified(int arg) const { |
|
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1860 return array_uint_at(arg); |
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1861 } |
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|
1862 |
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|
1863 void set_arg_modified(int arg, uint val) { |
|
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1864 array_set_int_at(arg, val); |
|
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1865 } |
|
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1866 |
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1867 #ifndef PRODUCT |
|
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1868 void print_data_on(outputStream* st, const char* extra = NULL) const; |
|
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1869 #endif |
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|
1870 }; |
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1871 |
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1872 // ParametersTypeData |
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1873 // |
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1874 // A ParametersTypeData is used to access profiling information about |
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1875 // types of parameters to a method |
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|
1876 class ParametersTypeData : public ArrayData { |
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|
1877 |
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1878 private: |
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1879 TypeStackSlotEntries _parameters; |
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1880 |
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1881 static int stack_slot_local_offset(int i) { |
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1882 assert_profiling_enabled(); |
|
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1883 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1884 } |
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1885 |
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1886 static int type_local_offset(int i) { |
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|
1887 assert_profiling_enabled(); |
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1888 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1889 } |
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|
1890 |
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1891 static bool profiling_enabled(); |
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1892 static void assert_profiling_enabled() { |
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1893 assert(profiling_enabled(), "method parameters profiling should be on"); |
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|
1894 } |
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1895 |
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1896 public: |
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1897 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1898 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1899 // Some compilers (VC++) don't want this passed in member initialization list |
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1900 _parameters.set_profile_data(this); |
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1901 } |
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1902 |
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1903 static int compute_cell_count(Method* m); |
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1904 |
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1905 virtual bool is_ParametersTypeData() const { return true; } |
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1906 |
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1907 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1908 |
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1909 int number_of_parameters() const { |
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1910 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1911 } |
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1912 |
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1913 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1914 |
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1915 uint stack_slot(int i) const { |
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1916 return _parameters.stack_slot(i); |
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1917 } |
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1918 |
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1919 void set_type(int i, Klass* k) { |
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1920 intptr_t current = _parameters.type(i); |
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1921 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1922 } |
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1923 |
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1924 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1925 _parameters.clean_weak_klass_links(is_alive_closure); |
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1926 } |
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1927 |
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1928 #ifndef PRODUCT |
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1929 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1930 #endif |
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1931 |
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1932 static ByteSize stack_slot_offset(int i) { |
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1933 return cell_offset(stack_slot_local_offset(i)); |
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1934 } |
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1935 |
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1936 static ByteSize type_offset(int i) { |
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1937 return cell_offset(type_local_offset(i)); |
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1938 } |
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1939 }; |
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1940 |
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1941 // SpeculativeTrapData |
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1942 // |
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1943 // A SpeculativeTrapData is used to record traps due to type |
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1944 // speculation. It records the root of the compilation: that type |
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1945 // speculation is wrong in the context of one compilation (for |
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1946 // method1) doesn't mean it's wrong in the context of another one (for |
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1947 // method2). Type speculation could have more/different data in the |
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1948 // context of the compilation of method2 and it's worthwhile to try an |
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1949 // optimization that failed for compilation of method1 in the context |
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1950 // of compilation of method2. |
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1951 // Space for SpeculativeTrapData entries is allocated from the extra |
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1952 // data space in the MDO. If we run out of space, the trap data for |
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1953 // the ProfileData at that bci is updated. |
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1954 class SpeculativeTrapData : public ProfileData { |
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1955 protected: |
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1956 enum { |
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1957 method_offset, |
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1958 speculative_trap_cell_count |
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1959 }; |
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1960 public: |
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1961 SpeculativeTrapData(DataLayout* layout) : ProfileData(layout) { |
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1962 assert(layout->tag() == DataLayout::speculative_trap_data_tag, "wrong type"); |
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1963 } |
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1964 |
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1965 virtual bool is_SpeculativeTrapData() const { return true; } |
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1966 |
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1967 static int static_cell_count() { |
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1968 return speculative_trap_cell_count; |
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1969 } |
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1970 |
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1971 virtual int cell_count() const { |
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1972 return static_cell_count(); |
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1973 } |
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1974 |
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1975 // Direct accessor |
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1976 Method* method() const { |
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1977 return (Method*)intptr_at(method_offset); |
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1978 } |
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1979 |
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1980 void set_method(Method* m) { |
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1981 set_intptr_at(method_offset, (intptr_t)m); |
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1982 } |
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1983 |
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1984 #ifndef PRODUCT |
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1985 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1986 #endif |
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1987 }; |
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1988 |
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1989 // MethodData* |
| 0 | 1990 // |
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1991 // A MethodData* holds information which has been collected about |
| 0 | 1992 // a method. Its layout looks like this: |
| 1993 // | |
| 1994 // ----------------------------- | |
| 1995 // | header | | |
| 1996 // | klass | | |
| 1997 // ----------------------------- | |
| 1998 // | method | | |
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1999 // | size of the MethodData* | |
| 0 | 2000 // ----------------------------- |
| 2001 // | Data entries... | | |
| 2002 // | (variable size) | | |
| 2003 // | | | |
| 2004 // . . | |
| 2005 // . . | |
| 2006 // . . | |
| 2007 // | | | |
| 2008 // ----------------------------- | |
| 2009 // | |
| 2010 // The data entry area is a heterogeneous array of DataLayouts. Each | |
| 2011 // DataLayout in the array corresponds to a specific bytecode in the | |
| 2012 // method. The entries in the array are sorted by the corresponding | |
| 2013 // bytecode. Access to the data is via resource-allocated ProfileData, | |
| 2014 // which point to the underlying blocks of DataLayout structures. | |
| 2015 // | |
| 2016 // During interpretation, if profiling in enabled, the interpreter | |
| 2017 // maintains a method data pointer (mdp), which points at the entry | |
| 2018 // in the array corresponding to the current bci. In the course of | |
| 2019 // intepretation, when a bytecode is encountered that has profile data | |
| 2020 // associated with it, the entry pointed to by mdp is updated, then the | |
| 2021 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
| 2022 // is NULL to begin with, the interpreter assumes that the current method | |
| 2023 // is not (yet) being profiled. | |
| 2024 // | |
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2025 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
| 0 | 2026 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
| 2027 // from the base of the data entry array. A "displacement" is the byte offset | |
| 2028 // in certain ProfileData objects that indicate the amount the mdp must be | |
| 2029 // adjusted in the event of a change in control flow. | |
| 2030 // | |
| 2031 | |
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2032 CC_INTERP_ONLY(class BytecodeInterpreter;) |
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2033 |
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2034 class MethodData : public Metadata { |
| 0 | 2035 friend class VMStructs; |
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2036 CC_INTERP_ONLY(friend class BytecodeInterpreter;) |
| 0 | 2037 private: |
| 2038 friend class ProfileData; | |
| 2039 | |
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2040 // Back pointer to the Method* |
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2041 Method* _method; |
| 0 | 2042 |
| 2043 // Size of this oop in bytes | |
| 2044 int _size; | |
| 2045 | |
| 2046 // Cached hint for bci_to_dp and bci_to_data | |
| 2047 int _hint_di; | |
| 2048 | |
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2049 Mutex _extra_data_lock; |
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2050 |
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2051 MethodData(methodHandle method, int size, TRAPS); |
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2052 public: |
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2053 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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2054 MethodData() : _extra_data_lock(Monitor::leaf, "MDO extra data lock") {}; // For ciMethodData |
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2055 |
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2056 bool is_methodData() const volatile { return true; } |
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2057 |
| 0 | 2058 // Whole-method sticky bits and flags |
| 2059 enum { | |
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2060 _trap_hist_limit = 20, // decoupled from Deoptimization::Reason_LIMIT |
| 0 | 2061 _trap_hist_mask = max_jubyte, |
| 2062 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
| 2063 }; // Public flag values | |
| 2064 private: | |
| 2065 uint _nof_decompiles; // count of all nmethod removals | |
| 2066 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
| 2067 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
| 2068 union { | |
| 2069 intptr_t _align; | |
| 2070 u1 _array[_trap_hist_limit]; | |
| 2071 } _trap_hist; | |
| 2072 | |
| 2073 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
| 2074 intx _eflags; // flags on escape information | |
| 2075 intx _arg_local; // bit set of non-escaping arguments | |
| 2076 intx _arg_stack; // bit set of stack-allocatable arguments | |
| 2077 intx _arg_returned; // bit set of returned arguments | |
| 2078 | |
| 1783 | 2079 int _creation_mileage; // method mileage at MDO creation |
| 2080 | |
| 2081 // How many invocations has this MDO seen? | |
| 2082 // These counters are used to determine the exact age of MDO. | |
| 2083 // We need those because in tiered a method can be concurrently | |
| 2084 // executed at different levels. | |
| 2085 InvocationCounter _invocation_counter; | |
| 2086 // Same for backedges. | |
| 2087 InvocationCounter _backedge_counter; | |
| 2252 | 2088 // Counter values at the time profiling started. |
| 2089 int _invocation_counter_start; | |
| 2090 int _backedge_counter_start; | |
| 17780 | 2091 |
| 2092 #if INCLUDE_RTM_OPT | |
| 2093 // State of RTM code generation during compilation of the method | |
| 2094 int _rtm_state; | |
| 2095 #endif | |
| 2096 | |
| 1783 | 2097 // Number of loops and blocks is computed when compiling the first |
| 2098 // time with C1. It is used to determine if method is trivial. | |
| 2099 short _num_loops; | |
| 2100 short _num_blocks; | |
| 2101 // Does this method contain anything worth profiling? | |
| 2102 bool _would_profile; | |
| 0 | 2103 |
| 2104 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
| 2105 int _data_size; | |
| 2106 | |
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2107 // data index for the area dedicated to parameters. -1 if no |
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2108 // parameter profiling. |
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2109 int _parameters_type_data_di; |
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2110 |
| 0 | 2111 // Beginning of the data entries |
| 2112 intptr_t _data[1]; | |
| 2113 | |
| 2114 // Helper for size computation | |
| 2115 static int compute_data_size(BytecodeStream* stream); | |
| 2116 static int bytecode_cell_count(Bytecodes::Code code); | |
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2117 static bool is_speculative_trap_bytecode(Bytecodes::Code code); |
| 0 | 2118 enum { no_profile_data = -1, variable_cell_count = -2 }; |
| 2119 | |
| 2120 // Helper for initialization | |
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2121 DataLayout* data_layout_at(int data_index) const { |
| 0 | 2122 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
| 2123 return (DataLayout*) (((address)_data) + data_index); | |
| 2124 } | |
| 2125 | |
| 2126 // Initialize an individual data segment. Returns the size of | |
| 2127 // the segment in bytes. | |
| 2128 int initialize_data(BytecodeStream* stream, int data_index); | |
| 2129 | |
| 2130 // Helper for data_at | |
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2131 DataLayout* limit_data_position() const { |
| 0 | 2132 return (DataLayout*)((address)data_base() + _data_size); |
| 2133 } | |
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2134 bool out_of_bounds(int data_index) const { |
| 0 | 2135 return data_index >= data_size(); |
| 2136 } | |
| 2137 | |
| 2138 // Give each of the data entries a chance to perform specific | |
| 2139 // data initialization. | |
| 2140 void post_initialize(BytecodeStream* stream); | |
| 2141 | |
| 2142 // hint accessors | |
| 2143 int hint_di() const { return _hint_di; } | |
| 2144 void set_hint_di(int di) { | |
| 2145 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
| 2146 _hint_di = di; | |
| 2147 } | |
| 2148 ProfileData* data_before(int bci) { | |
| 2149 // avoid SEGV on this edge case | |
| 2150 if (data_size() == 0) | |
| 2151 return NULL; | |
| 2152 int hint = hint_di(); | |
| 2153 if (data_layout_at(hint)->bci() <= bci) | |
| 2154 return data_at(hint); | |
| 2155 return first_data(); | |
| 2156 } | |
| 2157 | |
| 2158 // What is the index of the first data entry? | |
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2159 int first_di() const { return 0; } |
| 0 | 2160 |
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2161 ProfileData* bci_to_extra_data_helper(int bci, Method* m, DataLayout*& dp, bool concurrent); |
| 0 | 2162 // Find or create an extra ProfileData: |
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2163 ProfileData* bci_to_extra_data(int bci, Method* m, bool create_if_missing); |
| 0 | 2164 |
|
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2165 // return the argument info cell |
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2166 ArgInfoData *arg_info(); |
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2167 |
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2168 enum { |
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2169 no_type_profile = 0, |
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2170 type_profile_jsr292 = 1, |
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2171 type_profile_all = 2 |
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2172 }; |
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2173 |
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2174 static bool profile_jsr292(methodHandle m, int bci); |
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2175 static int profile_arguments_flag(); |
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2176 static bool profile_all_arguments(); |
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2177 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2178 static int profile_return_flag(); |
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2179 static bool profile_all_return(); |
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2180 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2181 static int profile_parameters_flag(); |
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2182 static bool profile_parameters_jsr292_only(); |
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2183 static bool profile_all_parameters(); |
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2184 |
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2185 void clean_extra_data(BoolObjectClosure* is_alive); |
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2186 void clean_extra_data_helper(DataLayout* dp, int shift, bool reset = false); |
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2187 void verify_extra_data_clean(BoolObjectClosure* is_alive); |
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2188 |
| 0 | 2189 public: |
| 2190 static int header_size() { | |
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2191 return sizeof(MethodData)/wordSize; |
| 0 | 2192 } |
| 2193 | |
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2194 // Compute the size of a MethodData* before it is created. |
| 0 | 2195 static int compute_allocation_size_in_bytes(methodHandle method); |
| 2196 static int compute_allocation_size_in_words(methodHandle method); | |
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2197 static int compute_extra_data_count(int data_size, int empty_bc_count, bool needs_speculative_traps); |
| 0 | 2198 |
| 2199 // Determine if a given bytecode can have profile information. | |
| 2200 static bool bytecode_has_profile(Bytecodes::Code code) { | |
| 2201 return bytecode_cell_count(code) != no_profile_data; | |
| 2202 } | |
| 2203 | |
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2204 // reset into original state |
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2205 void init(); |
| 0 | 2206 |
| 2207 // My size | |
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2208 int size_in_bytes() const { return _size; } |
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2209 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
| 7956 | 2210 #if INCLUDE_SERVICES |
| 2211 void collect_statistics(KlassSizeStats *sz) const; | |
| 2212 #endif | |
| 0 | 2213 |
| 2214 int creation_mileage() const { return _creation_mileage; } | |
| 2215 void set_creation_mileage(int x) { _creation_mileage = x; } | |
| 1783 | 2216 |
| 2217 int invocation_count() { | |
| 2218 if (invocation_counter()->carry()) { | |
| 2219 return InvocationCounter::count_limit; | |
| 2220 } | |
| 2221 return invocation_counter()->count(); | |
| 2222 } | |
| 2223 int backedge_count() { | |
| 2224 if (backedge_counter()->carry()) { | |
| 2225 return InvocationCounter::count_limit; | |
| 2226 } | |
| 2227 return backedge_counter()->count(); | |
| 2228 } | |
| 2229 | |
| 2252 | 2230 int invocation_count_start() { |
| 2231 if (invocation_counter()->carry()) { | |
| 2232 return 0; | |
| 2233 } | |
| 2234 return _invocation_counter_start; | |
| 2235 } | |
| 2236 | |
| 2237 int backedge_count_start() { | |
| 2238 if (backedge_counter()->carry()) { | |
| 2239 return 0; | |
| 2240 } | |
| 2241 return _backedge_counter_start; | |
| 2242 } | |
| 2243 | |
| 2244 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
| 2245 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
| 2246 | |
| 2247 void reset_start_counters() { | |
| 2248 _invocation_counter_start = invocation_count(); | |
| 2249 _backedge_counter_start = backedge_count(); | |
| 2250 } | |
| 2251 | |
| 1783 | 2252 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
| 2253 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
| 2254 | |
| 17780 | 2255 #if INCLUDE_RTM_OPT |
| 2256 int rtm_state() const { | |
| 2257 return _rtm_state; | |
| 2258 } | |
| 2259 void set_rtm_state(RTMState rstate) { | |
| 2260 _rtm_state = (int)rstate; | |
| 2261 } | |
| 2262 void atomic_set_rtm_state(RTMState rstate) { | |
| 2263 Atomic::store((int)rstate, &_rtm_state); | |
| 2264 } | |
| 2265 | |
| 2266 static int rtm_state_offset_in_bytes() { | |
| 2267 return offset_of(MethodData, _rtm_state); | |
| 2268 } | |
| 2269 #endif | |
| 2270 | |
| 1783 | 2271 void set_would_profile(bool p) { _would_profile = p; } |
| 2272 bool would_profile() const { return _would_profile; } | |
| 2273 | |
| 2274 int num_loops() const { return _num_loops; } | |
| 2275 void set_num_loops(int n) { _num_loops = n; } | |
| 2276 int num_blocks() const { return _num_blocks; } | |
| 2277 void set_num_blocks(int n) { _num_blocks = n; } | |
| 2278 | |
| 0 | 2279 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
|
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2280 static int mileage_of(Method* m); |
| 0 | 2281 |
| 2282 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
| 2283 enum EscapeFlag { | |
| 2284 estimated = 1 << 0, | |
|
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2285 return_local = 1 << 1, |
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2286 return_allocated = 1 << 2, |
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2287 allocated_escapes = 1 << 3, |
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2288 unknown_modified = 1 << 4 |
| 0 | 2289 }; |
| 2290 | |
| 2291 intx eflags() { return _eflags; } | |
| 2292 intx arg_local() { return _arg_local; } | |
| 2293 intx arg_stack() { return _arg_stack; } | |
| 2294 intx arg_returned() { return _arg_returned; } | |
|
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2295 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
|
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2296 assert(aid != NULL, "arg_info must be not null"); |
|
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2297 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2298 return aid->arg_modified(a); } |
| 0 | 2299 |
| 2300 void set_eflags(intx v) { _eflags = v; } | |
| 2301 void set_arg_local(intx v) { _arg_local = v; } | |
| 2302 void set_arg_stack(intx v) { _arg_stack = v; } | |
| 2303 void set_arg_returned(intx v) { _arg_returned = v; } | |
|
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2304 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
|
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2305 assert(aid != NULL, "arg_info must be not null"); |
|
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2306 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2307 aid->set_arg_modified(a, v); } |
| 0 | 2308 |
| 2309 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
| 2310 | |
| 2311 // Location and size of data area | |
| 2312 address data_base() const { | |
| 2313 return (address) _data; | |
| 2314 } | |
|
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2315 int data_size() const { |
| 0 | 2316 return _data_size; |
| 2317 } | |
| 2318 | |
| 2319 // Accessors | |
|
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2320 Method* method() const { return _method; } |
| 0 | 2321 |
| 2322 // Get the data at an arbitrary (sort of) data index. | |
|
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2323 ProfileData* data_at(int data_index) const; |
| 0 | 2324 |
| 2325 // Walk through the data in order. | |
|
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2326 ProfileData* first_data() const { return data_at(first_di()); } |
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2327 ProfileData* next_data(ProfileData* current) const; |
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2328 bool is_valid(ProfileData* current) const { return current != NULL; } |
| 0 | 2329 |
| 2330 // Convert a dp (data pointer) to a di (data index). | |
|
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2331 int dp_to_di(address dp) const { |
| 0 | 2332 return dp - ((address)_data); |
| 2333 } | |
| 2334 | |
| 2335 address di_to_dp(int di) { | |
| 2336 return (address)data_layout_at(di); | |
| 2337 } | |
| 2338 | |
| 2339 // bci to di/dp conversion. | |
| 2340 address bci_to_dp(int bci); | |
| 2341 int bci_to_di(int bci) { | |
| 2342 return dp_to_di(bci_to_dp(bci)); | |
| 2343 } | |
| 2344 | |
| 2345 // Get the data at an arbitrary bci, or NULL if there is none. | |
| 2346 ProfileData* bci_to_data(int bci); | |
| 2347 | |
| 2348 // Same, but try to create an extra_data record if one is needed: | |
|
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2349 ProfileData* allocate_bci_to_data(int bci, Method* m) { |
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2350 ProfileData* data = NULL; |
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2351 // If m not NULL, try to allocate a SpeculativeTrapData entry |
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2352 if (m == NULL) { |
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2353 data = bci_to_data(bci); |
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2354 } |
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2355 if (data != NULL) { |
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2356 return data; |
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|
2357 } |
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2358 data = bci_to_extra_data(bci, m, true); |
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2359 if (data != NULL) { |
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|
2360 return data; |
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|
2361 } |
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2362 // If SpeculativeTrapData allocation fails try to allocate a |
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2363 // regular entry |
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2364 data = bci_to_data(bci); |
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2365 if (data != NULL) { |
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|
2366 return data; |
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|
2367 } |
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2368 return bci_to_extra_data(bci, NULL, true); |
| 0 | 2369 } |
| 2370 | |
| 2371 // Add a handful of extra data records, for trap tracking. | |
|
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2372 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2373 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2374 int extra_data_size() const { return (address)extra_data_limit() |
| 0 | 2375 - (address)extra_data_base(); } |
|
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2376 static DataLayout* next_extra(DataLayout* dp); |
| 0 | 2377 |
| 2378 // Return (uint)-1 for overflow. | |
| 2379 uint trap_count(int reason) const { | |
| 2380 assert((uint)reason < _trap_hist_limit, "oob"); | |
| 2381 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
| 2382 } | |
| 2383 // For loops: | |
| 2384 static uint trap_reason_limit() { return _trap_hist_limit; } | |
| 2385 static uint trap_count_limit() { return _trap_hist_mask; } | |
| 2386 uint inc_trap_count(int reason) { | |
| 2387 // Count another trap, anywhere in this method. | |
| 2388 assert(reason >= 0, "must be single trap"); | |
| 2389 if ((uint)reason < _trap_hist_limit) { | |
| 2390 uint cnt1 = 1 + _trap_hist._array[reason]; | |
| 2391 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
| 2392 _trap_hist._array[reason] = cnt1; | |
| 2393 return cnt1; | |
| 2394 } else { | |
| 2395 return _trap_hist_mask + (++_nof_overflow_traps); | |
| 2396 } | |
| 2397 } else { | |
| 2398 // Could not represent the count in the histogram. | |
| 2399 return (++_nof_overflow_traps); | |
| 2400 } | |
| 2401 } | |
| 2402 | |
| 2403 uint overflow_trap_count() const { | |
| 2404 return _nof_overflow_traps; | |
| 2405 } | |
| 2406 uint overflow_recompile_count() const { | |
| 2407 return _nof_overflow_recompiles; | |
| 2408 } | |
| 2409 void inc_overflow_recompile_count() { | |
| 2410 _nof_overflow_recompiles += 1; | |
| 2411 } | |
| 2412 uint decompile_count() const { | |
| 2413 return _nof_decompiles; | |
| 2414 } | |
| 2415 void inc_decompile_count() { | |
| 2416 _nof_decompiles += 1; | |
|
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2417 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
| 7998 | 2418 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
|
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2419 } |
| 0 | 2420 } |
| 2421 | |
|
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2422 // Return pointer to area dedicated to parameters in MDO |
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|
2423 ParametersTypeData* parameters_type_data() const { |
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2424 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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|
2425 } |
|
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|
2426 |
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|
2427 int parameters_type_data_di() const { |
|
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|
2428 assert(_parameters_type_data_di != -1, "no args type data"); |
|
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|
2429 return _parameters_type_data_di; |
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|
2430 } |
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|
2431 |
| 0 | 2432 // Support for code generation |
| 2433 static ByteSize data_offset() { | |
|
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2434 return byte_offset_of(MethodData, _data[0]); |
| 0 | 2435 } |
| 2436 | |
| 1783 | 2437 static ByteSize invocation_counter_offset() { |
|
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2438 return byte_offset_of(MethodData, _invocation_counter); |
| 1783 | 2439 } |
| 2440 static ByteSize backedge_counter_offset() { | |
|
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2441 return byte_offset_of(MethodData, _backedge_counter); |
| 1783 | 2442 } |
| 2443 | |
|
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2444 static ByteSize parameters_type_data_di_offset() { |
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|
2445 return byte_offset_of(MethodData, _parameters_type_data_di); |
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|
2446 } |
|
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|
2447 |
|
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2448 // Deallocation support - no pointer fields to deallocate |
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2449 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2450 |
| 0 | 2451 // GC support |
|
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2452 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2453 |
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2454 // Printing |
|
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|
2455 #ifndef PRODUCT |
|
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|
2456 void print_on (outputStream* st) const; |
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2457 #endif |
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2458 void print_value_on(outputStream* st) const; |
| 0 | 2459 |
| 2460 #ifndef PRODUCT | |
| 2461 // printing support for method data | |
|
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2462 void print_data_on(outputStream* st) const; |
| 0 | 2463 #endif |
| 2464 | |
|
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2465 const char* internal_name() const { return "{method data}"; } |
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2466 |
| 0 | 2467 // verification |
|
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2468 void verify_on(outputStream* st); |
| 0 | 2469 void verify_data_on(outputStream* st); |
|
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2470 |
|
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2471 static bool profile_parameters_for_method(methodHandle m); |
|
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2472 static bool profile_arguments(); |
|
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2473 static bool profile_arguments_jsr292_only(); |
|
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2474 static bool profile_return(); |
|
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2475 static bool profile_parameters(); |
|
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2476 static bool profile_return_jsr292_only(); |
|
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2477 |
|
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2478 void clean_method_data(BoolObjectClosure* is_alive); |
| 0 | 2479 }; |
| 1972 | 2480 |
| 2481 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |