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annotate src/share/vm/oops/methodData.hpp @ 14435:da862781b584
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author | kvn |
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date | Thu, 21 Nov 2013 12:30:35 -0800 |
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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 |
0 | 124 }; |
125 | |
126 enum { | |
127 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
128 // The trap state breaks down further as [recompile:1 | reason:3]. | |
129 // This further breakdown is defined in deoptimization.cpp. | |
130 // See Deoptimization::trap_state_reason for an assert that | |
131 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
132 // | |
133 // The trap_state is collected only if ProfileTraps is true. | |
134 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
135 trap_shift = BitsPerByte - trap_bits, | |
136 trap_mask = right_n_bits(trap_bits), | |
137 trap_mask_in_place = (trap_mask << trap_shift), | |
138 flag_limit = trap_shift, | |
139 flag_mask = right_n_bits(flag_limit), | |
140 first_flag = 0 | |
141 }; | |
142 | |
143 // Size computation | |
144 static int header_size_in_bytes() { | |
145 return cell_size; | |
146 } | |
147 static int header_size_in_cells() { | |
148 return 1; | |
149 } | |
150 | |
151 static int compute_size_in_bytes(int cell_count) { | |
152 return header_size_in_bytes() + cell_count * cell_size; | |
153 } | |
154 | |
155 // Initialization | |
156 void initialize(u1 tag, u2 bci, int cell_count); | |
157 | |
158 // Accessors | |
159 u1 tag() { | |
160 return _header._struct._tag; | |
161 } | |
162 | |
163 // Return a few bits of trap state. Range is [0..trap_mask]. | |
164 // The state tells if traps with zero, one, or many reasons have occurred. | |
165 // It also tells whether zero or many recompilations have occurred. | |
166 // The associated trap histogram in the MDO itself tells whether | |
167 // traps are common or not. If a BCI shows that a trap X has | |
168 // occurred, and the MDO shows N occurrences of X, we make the | |
169 // simplifying assumption that all N occurrences can be blamed | |
170 // on that BCI. | |
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171 int trap_state() const { |
0 | 172 return ((_header._struct._flags >> trap_shift) & trap_mask); |
173 } | |
174 | |
175 void set_trap_state(int new_state) { | |
176 assert(ProfileTraps, "used only under +ProfileTraps"); | |
177 uint old_flags = (_header._struct._flags & flag_mask); | |
178 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
179 } | |
180 | |
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181 u1 flags() const { |
0 | 182 return _header._struct._flags; |
183 } | |
184 | |
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185 u2 bci() const { |
0 | 186 return _header._struct._bci; |
187 } | |
188 | |
189 void set_header(intptr_t value) { | |
190 _header._bits = value; | |
191 } | |
192 void release_set_header(intptr_t value) { | |
193 OrderAccess::release_store_ptr(&_header._bits, value); | |
194 } | |
195 intptr_t header() { | |
196 return _header._bits; | |
197 } | |
198 void set_cell_at(int index, intptr_t value) { | |
199 _cells[index] = value; | |
200 } | |
201 void release_set_cell_at(int index, intptr_t value) { | |
202 OrderAccess::release_store_ptr(&_cells[index], value); | |
203 } | |
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204 intptr_t cell_at(int index) const { |
0 | 205 return _cells[index]; |
206 } | |
207 | |
208 void set_flag_at(int flag_number) { | |
209 assert(flag_number < flag_limit, "oob"); | |
210 _header._struct._flags |= (0x1 << flag_number); | |
211 } | |
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212 bool flag_at(int flag_number) const { |
0 | 213 assert(flag_number < flag_limit, "oob"); |
214 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
215 } | |
216 | |
217 // Low-level support for code generation. | |
218 static ByteSize header_offset() { | |
219 return byte_offset_of(DataLayout, _header); | |
220 } | |
221 static ByteSize tag_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._tag); | |
223 } | |
224 static ByteSize flags_offset() { | |
225 return byte_offset_of(DataLayout, _header._struct._flags); | |
226 } | |
227 static ByteSize bci_offset() { | |
228 return byte_offset_of(DataLayout, _header._struct._bci); | |
229 } | |
230 static ByteSize cell_offset(int index) { | |
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231 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 232 } |
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233 #ifdef CC_INTERP |
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234 static int cell_offset_in_bytes(int index) { |
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235 return (int)offset_of(DataLayout, _cells[index]); |
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236 } |
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237 #endif // CC_INTERP |
0 | 238 // Return a value which, when or-ed as a byte into _flags, sets the flag. |
239 static int flag_number_to_byte_constant(int flag_number) { | |
240 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
241 DataLayout temp; temp.set_header(0); | |
242 temp.set_flag_at(flag_number); | |
243 return temp._header._struct._flags; | |
244 } | |
245 // Return a value which, when or-ed as a word into _header, sets the flag. | |
246 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
247 DataLayout temp; temp.set_header(0); | |
248 temp._header._struct._flags = byte_constant; | |
249 return temp._header._bits; | |
250 } | |
941 | 251 |
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252 ProfileData* data_in(); |
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253 |
941 | 254 // GC support |
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255 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 256 }; |
257 | |
258 | |
259 // ProfileData class hierarchy | |
260 class ProfileData; | |
261 class BitData; | |
262 class CounterData; | |
263 class ReceiverTypeData; | |
264 class VirtualCallData; | |
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265 class VirtualCallTypeData; |
0 | 266 class RetData; |
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267 class CallTypeData; |
0 | 268 class JumpData; |
269 class BranchData; | |
270 class ArrayData; | |
271 class MultiBranchData; | |
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272 class ArgInfoData; |
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273 class ParametersTypeData; |
0 | 274 |
275 // ProfileData | |
276 // | |
277 // A ProfileData object is created to refer to a section of profiling | |
278 // data in a structured way. | |
279 class ProfileData : public ResourceObj { | |
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280 friend class TypeEntries; |
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281 friend class ReturnTypeEntry; |
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282 friend class TypeStackSlotEntries; |
0 | 283 private: |
284 #ifndef PRODUCT | |
285 enum { | |
286 tab_width_one = 16, | |
287 tab_width_two = 36 | |
288 }; | |
289 #endif // !PRODUCT | |
290 | |
291 // This is a pointer to a section of profiling data. | |
292 DataLayout* _data; | |
293 | |
294 protected: | |
295 DataLayout* data() { return _data; } | |
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296 const DataLayout* data() const { return _data; } |
0 | 297 |
298 enum { | |
299 cell_size = DataLayout::cell_size | |
300 }; | |
301 | |
302 public: | |
303 // How many cells are in this? | |
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304 virtual int cell_count() const { |
0 | 305 ShouldNotReachHere(); |
306 return -1; | |
307 } | |
308 | |
309 // Return the size of this data. | |
310 int size_in_bytes() { | |
311 return DataLayout::compute_size_in_bytes(cell_count()); | |
312 } | |
313 | |
314 protected: | |
315 // Low-level accessors for underlying data | |
316 void set_intptr_at(int index, intptr_t value) { | |
317 assert(0 <= index && index < cell_count(), "oob"); | |
318 data()->set_cell_at(index, value); | |
319 } | |
320 void release_set_intptr_at(int index, intptr_t value) { | |
321 assert(0 <= index && index < cell_count(), "oob"); | |
322 data()->release_set_cell_at(index, value); | |
323 } | |
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324 intptr_t intptr_at(int index) const { |
0 | 325 assert(0 <= index && index < cell_count(), "oob"); |
326 return data()->cell_at(index); | |
327 } | |
328 void set_uint_at(int index, uint value) { | |
329 set_intptr_at(index, (intptr_t) value); | |
330 } | |
331 void release_set_uint_at(int index, uint value) { | |
332 release_set_intptr_at(index, (intptr_t) value); | |
333 } | |
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334 uint uint_at(int index) const { |
0 | 335 return (uint)intptr_at(index); |
336 } | |
337 void set_int_at(int index, int value) { | |
338 set_intptr_at(index, (intptr_t) value); | |
339 } | |
340 void release_set_int_at(int index, int value) { | |
341 release_set_intptr_at(index, (intptr_t) value); | |
342 } | |
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343 int int_at(int index) const { |
0 | 344 return (int)intptr_at(index); |
345 } | |
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346 int int_at_unchecked(int index) const { |
0 | 347 return (int)data()->cell_at(index); |
348 } | |
349 void set_oop_at(int index, oop value) { | |
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350 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 351 } |
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352 oop oop_at(int index) const { |
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353 return cast_to_oop(intptr_at(index)); |
0 | 354 } |
355 | |
356 void set_flag_at(int flag_number) { | |
357 data()->set_flag_at(flag_number); | |
358 } | |
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359 bool flag_at(int flag_number) const { |
0 | 360 return data()->flag_at(flag_number); |
361 } | |
362 | |
363 // two convenient imports for use by subclasses: | |
364 static ByteSize cell_offset(int index) { | |
365 return DataLayout::cell_offset(index); | |
366 } | |
367 static int flag_number_to_byte_constant(int flag_number) { | |
368 return DataLayout::flag_number_to_byte_constant(flag_number); | |
369 } | |
370 | |
371 ProfileData(DataLayout* data) { | |
372 _data = data; | |
373 } | |
374 | |
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375 #ifdef CC_INTERP |
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376 // Static low level accessors for DataLayout with ProfileData's semantics. |
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377 |
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378 static int cell_offset_in_bytes(int index) { |
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379 return DataLayout::cell_offset_in_bytes(index); |
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380 } |
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381 |
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382 static void increment_uint_at_no_overflow(DataLayout* layout, int index, |
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383 int inc = DataLayout::counter_increment) { |
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384 uint count = ((uint)layout->cell_at(index)) + inc; |
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385 if (count == 0) return; |
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386 layout->set_cell_at(index, (intptr_t) count); |
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387 } |
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388 |
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389 static int int_at(DataLayout* layout, int index) { |
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390 return (int)layout->cell_at(index); |
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391 } |
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392 |
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393 static int uint_at(DataLayout* layout, int index) { |
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394 return (uint)layout->cell_at(index); |
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395 } |
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396 |
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397 static oop oop_at(DataLayout* layout, int index) { |
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398 return cast_to_oop(layout->cell_at(index)); |
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399 } |
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400 |
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401 static void set_intptr_at(DataLayout* layout, int index, intptr_t value) { |
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402 layout->set_cell_at(index, (intptr_t) value); |
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403 } |
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404 |
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405 static void set_flag_at(DataLayout* layout, int flag_number) { |
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406 layout->set_flag_at(flag_number); |
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407 } |
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408 #endif // CC_INTERP |
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409 |
0 | 410 public: |
411 // Constructor for invalid ProfileData. | |
412 ProfileData(); | |
413 | |
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414 u2 bci() const { |
0 | 415 return data()->bci(); |
416 } | |
417 | |
418 address dp() { | |
419 return (address)_data; | |
420 } | |
421 | |
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422 int trap_state() const { |
0 | 423 return data()->trap_state(); |
424 } | |
425 void set_trap_state(int new_state) { | |
426 data()->set_trap_state(new_state); | |
427 } | |
428 | |
429 // Type checking | |
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430 virtual bool is_BitData() const { return false; } |
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431 virtual bool is_CounterData() const { return false; } |
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432 virtual bool is_JumpData() const { return false; } |
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433 virtual bool is_ReceiverTypeData()const { return false; } |
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434 virtual bool is_VirtualCallData() const { return false; } |
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435 virtual bool is_RetData() const { return false; } |
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436 virtual bool is_BranchData() const { return false; } |
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437 virtual bool is_ArrayData() const { return false; } |
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438 virtual bool is_MultiBranchData() const { return false; } |
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439 virtual bool is_ArgInfoData() const { return false; } |
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440 virtual bool is_CallTypeData() const { return false; } |
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441 virtual bool is_VirtualCallTypeData()const { return false; } |
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442 virtual bool is_ParametersTypeData() const { return false; } |
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443 |
0 | 444 |
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445 BitData* as_BitData() const { |
0 | 446 assert(is_BitData(), "wrong type"); |
447 return is_BitData() ? (BitData*) this : NULL; | |
448 } | |
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449 CounterData* as_CounterData() const { |
0 | 450 assert(is_CounterData(), "wrong type"); |
451 return is_CounterData() ? (CounterData*) this : NULL; | |
452 } | |
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453 JumpData* as_JumpData() const { |
0 | 454 assert(is_JumpData(), "wrong type"); |
455 return is_JumpData() ? (JumpData*) this : NULL; | |
456 } | |
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457 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 458 assert(is_ReceiverTypeData(), "wrong type"); |
459 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
460 } | |
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461 VirtualCallData* as_VirtualCallData() const { |
0 | 462 assert(is_VirtualCallData(), "wrong type"); |
463 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
464 } | |
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465 RetData* as_RetData() const { |
0 | 466 assert(is_RetData(), "wrong type"); |
467 return is_RetData() ? (RetData*) this : NULL; | |
468 } | |
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469 BranchData* as_BranchData() const { |
0 | 470 assert(is_BranchData(), "wrong type"); |
471 return is_BranchData() ? (BranchData*) this : NULL; | |
472 } | |
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473 ArrayData* as_ArrayData() const { |
0 | 474 assert(is_ArrayData(), "wrong type"); |
475 return is_ArrayData() ? (ArrayData*) this : NULL; | |
476 } | |
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477 MultiBranchData* as_MultiBranchData() const { |
0 | 478 assert(is_MultiBranchData(), "wrong type"); |
479 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
480 } | |
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481 ArgInfoData* as_ArgInfoData() const { |
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482 assert(is_ArgInfoData(), "wrong type"); |
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483 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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484 } |
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485 CallTypeData* as_CallTypeData() const { |
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486 assert(is_CallTypeData(), "wrong type"); |
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487 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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488 } |
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489 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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490 assert(is_VirtualCallTypeData(), "wrong type"); |
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491 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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492 } |
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493 ParametersTypeData* as_ParametersTypeData() const { |
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494 assert(is_ParametersTypeData(), "wrong type"); |
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495 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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496 } |
0 | 497 |
498 | |
499 // Subclass specific initialization | |
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500 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 501 |
502 // GC support | |
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503 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 504 |
505 // CI translation: ProfileData can represent both MethodDataOop data | |
506 // as well as CIMethodData data. This function is provided for translating | |
507 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
508 // most ProfileData don't require any translation, so we provide the null | |
509 // translation here, and the required translators are in the ci subclasses. | |
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510 virtual void translate_from(const ProfileData* data) {} |
0 | 511 |
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512 virtual void print_data_on(outputStream* st) const { |
0 | 513 ShouldNotReachHere(); |
514 } | |
515 | |
516 #ifndef PRODUCT | |
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517 void print_shared(outputStream* st, const char* name) const; |
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518 void tab(outputStream* st, bool first = false) const; |
0 | 519 #endif |
520 }; | |
521 | |
522 // BitData | |
523 // | |
524 // A BitData holds a flag or two in its header. | |
525 class BitData : public ProfileData { | |
526 protected: | |
527 enum { | |
528 // null_seen: | |
529 // saw a null operand (cast/aastore/instanceof) | |
530 null_seen_flag = DataLayout::first_flag + 0 | |
531 }; | |
532 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
533 public: | |
534 BitData(DataLayout* layout) : ProfileData(layout) { | |
535 } | |
536 | |
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537 virtual bool is_BitData() const { return true; } |
0 | 538 |
539 static int static_cell_count() { | |
540 return bit_cell_count; | |
541 } | |
542 | |
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543 virtual int cell_count() const { |
0 | 544 return static_cell_count(); |
545 } | |
546 | |
547 // Accessor | |
548 | |
549 // The null_seen flag bit is specially known to the interpreter. | |
550 // Consulting it allows the compiler to avoid setting up null_check traps. | |
551 bool null_seen() { return flag_at(null_seen_flag); } | |
552 void set_null_seen() { set_flag_at(null_seen_flag); } | |
553 | |
554 | |
555 // Code generation support | |
556 static int null_seen_byte_constant() { | |
557 return flag_number_to_byte_constant(null_seen_flag); | |
558 } | |
559 | |
560 static ByteSize bit_data_size() { | |
561 return cell_offset(bit_cell_count); | |
562 } | |
563 | |
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564 #ifdef CC_INTERP |
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565 static int bit_data_size_in_bytes() { |
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566 return cell_offset_in_bytes(bit_cell_count); |
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567 } |
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568 |
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569 static void set_null_seen(DataLayout* layout) { |
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570 set_flag_at(layout, null_seen_flag); |
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571 } |
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572 |
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573 static DataLayout* advance(DataLayout* layout) { |
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574 return (DataLayout*) (((address)layout) + (ssize_t)BitData::bit_data_size_in_bytes()); |
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575 } |
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576 #endif // CC_INTERP |
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577 |
0 | 578 #ifndef PRODUCT |
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579 void print_data_on(outputStream* st) const; |
0 | 580 #endif |
581 }; | |
582 | |
583 // CounterData | |
584 // | |
585 // A CounterData corresponds to a simple counter. | |
586 class CounterData : public BitData { | |
587 protected: | |
588 enum { | |
589 count_off, | |
590 counter_cell_count | |
591 }; | |
592 public: | |
593 CounterData(DataLayout* layout) : BitData(layout) {} | |
594 | |
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595 virtual bool is_CounterData() const { return true; } |
0 | 596 |
597 static int static_cell_count() { | |
598 return counter_cell_count; | |
599 } | |
600 | |
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601 virtual int cell_count() const { |
0 | 602 return static_cell_count(); |
603 } | |
604 | |
605 // Direct accessor | |
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606 uint count() const { |
0 | 607 return uint_at(count_off); |
608 } | |
609 | |
610 // Code generation support | |
611 static ByteSize count_offset() { | |
612 return cell_offset(count_off); | |
613 } | |
614 static ByteSize counter_data_size() { | |
615 return cell_offset(counter_cell_count); | |
616 } | |
617 | |
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618 void set_count(uint count) { |
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619 set_uint_at(count_off, count); |
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620 } |
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621 |
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622 #ifdef CC_INTERP |
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623 static int counter_data_size_in_bytes() { |
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624 return cell_offset_in_bytes(counter_cell_count); |
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625 } |
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626 |
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627 static void increment_count_no_overflow(DataLayout* layout) { |
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628 increment_uint_at_no_overflow(layout, count_off); |
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629 } |
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630 |
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631 // Support counter decrementation at checkcast / subtype check failed. |
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632 static void decrement_count(DataLayout* layout) { |
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633 increment_uint_at_no_overflow(layout, count_off, -1); |
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634 } |
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635 |
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636 static DataLayout* advance(DataLayout* layout) { |
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637 return (DataLayout*) (((address)layout) + (ssize_t)CounterData::counter_data_size_in_bytes()); |
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638 } |
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639 #endif // CC_INTERP |
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640 |
0 | 641 #ifndef PRODUCT |
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642 void print_data_on(outputStream* st) const; |
0 | 643 #endif |
644 }; | |
645 | |
646 // JumpData | |
647 // | |
648 // A JumpData is used to access profiling information for a direct | |
649 // branch. It is a counter, used for counting the number of branches, | |
650 // plus a data displacement, used for realigning the data pointer to | |
651 // the corresponding target bci. | |
652 class JumpData : public ProfileData { | |
653 protected: | |
654 enum { | |
655 taken_off_set, | |
656 displacement_off_set, | |
657 jump_cell_count | |
658 }; | |
659 | |
660 void set_displacement(int displacement) { | |
661 set_int_at(displacement_off_set, displacement); | |
662 } | |
663 | |
664 public: | |
665 JumpData(DataLayout* layout) : ProfileData(layout) { | |
666 assert(layout->tag() == DataLayout::jump_data_tag || | |
667 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
668 } | |
669 | |
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670 virtual bool is_JumpData() const { return true; } |
0 | 671 |
672 static int static_cell_count() { | |
673 return jump_cell_count; | |
674 } | |
675 | |
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676 virtual int cell_count() const { |
0 | 677 return static_cell_count(); |
678 } | |
679 | |
680 // Direct accessor | |
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681 uint taken() const { |
0 | 682 return uint_at(taken_off_set); |
683 } | |
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684 |
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685 void set_taken(uint cnt) { |
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686 set_uint_at(taken_off_set, cnt); |
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687 } |
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688 |
0 | 689 // Saturating counter |
690 uint inc_taken() { | |
691 uint cnt = taken() + 1; | |
692 // Did we wrap? Will compiler screw us?? | |
693 if (cnt == 0) cnt--; | |
694 set_uint_at(taken_off_set, cnt); | |
695 return cnt; | |
696 } | |
697 | |
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698 int displacement() const { |
0 | 699 return int_at(displacement_off_set); |
700 } | |
701 | |
702 // Code generation support | |
703 static ByteSize taken_offset() { | |
704 return cell_offset(taken_off_set); | |
705 } | |
706 | |
707 static ByteSize displacement_offset() { | |
708 return cell_offset(displacement_off_set); | |
709 } | |
710 | |
14420
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711 #ifdef CC_INTERP |
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712 static void increment_taken_count_no_overflow(DataLayout* layout) { |
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713 increment_uint_at_no_overflow(layout, taken_off_set); |
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714 } |
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715 |
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716 static DataLayout* advance_taken(DataLayout* layout) { |
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717 return (DataLayout*) (((address)layout) + (ssize_t)int_at(layout, displacement_off_set)); |
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718 } |
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719 |
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720 static uint taken_count(DataLayout* layout) { |
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721 return (uint) uint_at(layout, taken_off_set); |
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722 } |
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723 #endif // CC_INTERP |
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724 |
0 | 725 // Specific initialization. |
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726 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 727 |
728 #ifndef PRODUCT | |
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729 void print_data_on(outputStream* st) const; |
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730 #endif |
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731 }; |
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732 |
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733 // Entries in a ProfileData object to record types: it can either be |
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734 // none (no profile), unknown (conflicting profile data) or a klass if |
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735 // a single one is seen. Whether a null reference was seen is also |
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736 // recorded. No counter is associated with the type and a single type |
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737 // is tracked (unlike VirtualCallData). |
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738 class TypeEntries { |
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739 |
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740 public: |
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741 |
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742 // A single cell is used to record information for a type: |
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743 // - the cell is initialized to 0 |
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744 // - when a type is discovered it is stored in the cell |
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745 // - bit zero of the cell is used to record whether a null reference |
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746 // was encountered or not |
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747 // - bit 1 is set to record a conflict in the type information |
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748 |
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749 enum { |
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750 null_seen = 1, |
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751 type_mask = ~null_seen, |
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752 type_unknown = 2, |
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753 status_bits = null_seen | type_unknown, |
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754 type_klass_mask = ~status_bits |
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755 }; |
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756 |
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757 // what to initialize a cell to |
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758 static intptr_t type_none() { |
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759 return 0; |
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760 } |
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761 |
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762 // null seen = bit 0 set? |
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763 static bool was_null_seen(intptr_t v) { |
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764 return (v & null_seen) != 0; |
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765 } |
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766 |
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767 // conflicting type information = bit 1 set? |
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768 static bool is_type_unknown(intptr_t v) { |
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769 return (v & type_unknown) != 0; |
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770 } |
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771 |
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772 // not type information yet = all bits cleared, ignoring bit 0? |
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773 static bool is_type_none(intptr_t v) { |
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774 return (v & type_mask) == 0; |
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775 } |
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776 |
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777 // recorded type: cell without bit 0 and 1 |
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778 static intptr_t klass_part(intptr_t v) { |
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779 intptr_t r = v & type_klass_mask; |
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780 return r; |
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781 } |
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782 |
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783 // type recorded |
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784 static Klass* valid_klass(intptr_t k) { |
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785 if (!is_type_none(k) && |
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786 !is_type_unknown(k)) { |
13080 | 787 Klass* res = (Klass*)klass_part(k); |
788 assert(res != NULL, "invalid"); | |
789 return res; | |
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790 } else { |
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791 return NULL; |
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792 } |
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793 } |
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794 |
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795 static intptr_t with_status(intptr_t k, intptr_t in) { |
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796 return k | (in & status_bits); |
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797 } |
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798 |
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799 static intptr_t with_status(Klass* k, intptr_t in) { |
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800 return with_status((intptr_t)k, in); |
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801 } |
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802 |
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803 #ifndef PRODUCT |
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804 static void print_klass(outputStream* st, intptr_t k); |
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805 #endif |
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806 |
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807 // GC support |
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808 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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809 |
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810 protected: |
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811 // ProfileData object these entries are part of |
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812 ProfileData* _pd; |
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813 // offset within the ProfileData object where the entries start |
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814 const int _base_off; |
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815 |
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816 TypeEntries(int base_off) |
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817 : _base_off(base_off), _pd(NULL) {} |
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818 |
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819 void set_intptr_at(int index, intptr_t value) { |
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820 _pd->set_intptr_at(index, value); |
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821 } |
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822 |
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823 intptr_t intptr_at(int index) const { |
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|
824 return _pd->intptr_at(index); |
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|
825 } |
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|
826 |
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|
827 public: |
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|
828 void set_profile_data(ProfileData* pd) { |
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|
829 _pd = pd; |
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|
830 } |
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|
831 }; |
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|
832 |
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|
833 // Type entries used for arguments passed at a call and parameters on |
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|
834 // method entry. 2 cells per entry: one for the type encoded as in |
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|
835 // TypeEntries and one initialized with the stack slot where the |
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|
836 // profiled object is to be found so that the interpreter can locate |
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|
837 // it quickly. |
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|
838 class TypeStackSlotEntries : public TypeEntries { |
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|
839 |
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|
840 private: |
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|
841 enum { |
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|
842 stack_slot_entry, |
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|
843 type_entry, |
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|
844 per_arg_cell_count |
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|
845 }; |
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|
846 |
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|
847 // offset of cell for stack slot for entry i within ProfileData object |
12882
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848 int stack_slot_offset(int i) const { |
12875
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849 return _base_off + stack_slot_local_offset(i); |
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|
850 } |
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|
851 |
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|
852 protected: |
12882
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|
853 const int _number_of_entries; |
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|
854 |
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|
855 // offset of cell for type for entry i within ProfileData object |
12882
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856 int type_offset(int i) const { |
12875
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|
857 return _base_off + type_local_offset(i); |
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|
858 } |
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|
859 |
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|
860 public: |
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|
861 |
12882
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862 TypeStackSlotEntries(int base_off, int nb_entries) |
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863 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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|
864 |
12962
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|
865 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
12875
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|
866 |
12962
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|
867 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
12875
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|
868 |
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|
869 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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870 static int stack_slot_local_offset(int i) { |
12882
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871 return i * per_arg_cell_count + stack_slot_entry; |
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|
872 } |
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|
873 |
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|
874 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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|
875 static int type_local_offset(int i) { |
12882
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876 return i * per_arg_cell_count + type_entry; |
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|
877 } |
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|
878 |
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|
879 // stack slot for entry i |
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|
880 uint stack_slot(int i) const { |
12882
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|
881 assert(i >= 0 && i < _number_of_entries, "oob"); |
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882 return _pd->uint_at(stack_slot_offset(i)); |
12875
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|
883 } |
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|
884 |
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|
885 // set stack slot for entry i |
d13d7aba8c12
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|
886 void set_stack_slot(int i, uint num) { |
12882
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|
887 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
888 _pd->set_uint_at(stack_slot_offset(i), num); |
12875
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|
889 } |
d13d7aba8c12
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|
890 |
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|
891 // type for entry i |
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|
892 intptr_t type(int i) const { |
12882
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|
893 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
894 return _pd->intptr_at(type_offset(i)); |
12875
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|
895 } |
d13d7aba8c12
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|
896 |
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parents:
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|
897 // set type for entry i |
d13d7aba8c12
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parents:
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diff
changeset
|
898 void set_type(int i, intptr_t k) { |
12882
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|
899 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
900 _pd->set_intptr_at(type_offset(i), k); |
12875
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|
901 } |
d13d7aba8c12
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diff
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|
902 |
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|
903 static ByteSize per_arg_size() { |
d13d7aba8c12
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|
904 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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|
905 } |
d13d7aba8c12
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parents:
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diff
changeset
|
906 |
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parents:
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diff
changeset
|
907 static int per_arg_count() { |
d13d7aba8c12
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parents:
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diff
changeset
|
908 return per_arg_cell_count ; |
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diff
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|
909 } |
d13d7aba8c12
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parents:
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diff
changeset
|
910 |
12882
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diff
changeset
|
911 // GC support |
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|
912 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
913 |
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changeset
|
914 #ifndef PRODUCT |
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|
915 void print_data_on(outputStream* st) const; |
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|
916 #endif |
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|
917 }; |
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changeset
|
918 |
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|
919 // Type entry used for return from a call. A single cell to record the |
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|
920 // type. |
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|
921 class ReturnTypeEntry : public TypeEntries { |
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|
922 |
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|
923 private: |
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|
924 enum { |
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|
925 cell_count = 1 |
ce0cc25bc5e2
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|
926 }; |
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|
927 |
ce0cc25bc5e2
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|
928 public: |
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|
929 ReturnTypeEntry(int base_off) |
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|
930 : TypeEntries(base_off) {} |
12875
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|
931 |
12882
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|
932 void post_initialize() { |
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|
933 set_type(type_none()); |
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|
934 } |
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parents:
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changeset
|
935 |
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|
936 intptr_t type() const { |
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|
937 return _pd->intptr_at(_base_off); |
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|
938 } |
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changeset
|
939 |
ce0cc25bc5e2
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|
940 void set_type(intptr_t k) { |
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|
941 _pd->set_intptr_at(_base_off, k); |
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|
942 } |
12875
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|
943 |
12882
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parents:
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changeset
|
944 static int static_cell_count() { |
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|
945 return cell_count; |
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parents:
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|
946 } |
12875
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parents:
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|
947 |
12882
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changeset
|
948 static ByteSize size() { |
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|
949 return in_ByteSize(cell_count * DataLayout::cell_size); |
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|
950 } |
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|
951 |
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|
952 ByteSize type_offset() { |
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|
953 return DataLayout::cell_offset(_base_off); |
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|
954 } |
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parents:
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diff
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|
955 |
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parents:
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diff
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|
956 // GC support |
d13d7aba8c12
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|
957 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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roland
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diff
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|
958 |
d13d7aba8c12
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parents:
12316
diff
changeset
|
959 #ifndef PRODUCT |
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|
960 void print_data_on(outputStream* st) const; |
d13d7aba8c12
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parents:
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|
961 #endif |
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962 }; |
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963 |
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964 // Entries to collect type information at a call: contains arguments |
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965 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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966 // number of cells. Because the number of cells for the return type is |
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967 // smaller than the number of cells for the type of an arguments, the |
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968 // number of cells is used to tell how many arguments are profiled and |
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969 // whether a return value is profiled. See has_arguments() and |
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970 // has_return(). |
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971 class TypeEntriesAtCall { |
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972 private: |
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973 static int stack_slot_local_offset(int i) { |
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974 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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975 } |
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976 |
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977 static int argument_type_local_offset(int i) { |
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978 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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979 } |
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980 |
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981 public: |
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982 |
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983 static int header_cell_count() { |
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984 return 1; |
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985 } |
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986 |
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987 static int cell_count_local_offset() { |
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988 return 0; |
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989 } |
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990 |
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991 static int compute_cell_count(BytecodeStream* stream); |
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992 |
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993 static void initialize(DataLayout* dl, int base, int cell_count) { |
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994 int off = base + cell_count_local_offset(); |
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995 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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996 } |
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997 |
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998 static bool arguments_profiling_enabled(); |
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999 static bool return_profiling_enabled(); |
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1000 |
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1001 // Code generation support |
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1002 static ByteSize cell_count_offset() { |
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1003 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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1004 } |
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1005 |
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1006 static ByteSize args_data_offset() { |
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1007 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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1008 } |
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1009 |
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1010 static ByteSize stack_slot_offset(int i) { |
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1011 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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1012 } |
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1013 |
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1014 static ByteSize argument_type_offset(int i) { |
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1015 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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1016 } |
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1017 }; |
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1018 |
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1019 // CallTypeData |
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1020 // |
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1021 // A CallTypeData is used to access profiling information about a non |
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1022 // virtual call for which we collect type information about arguments |
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1023 // and return value. |
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1024 class CallTypeData : public CounterData { |
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1025 private: |
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1026 // entries for arguments if any |
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1027 TypeStackSlotEntries _args; |
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1028 // entry for return type if any |
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1029 ReturnTypeEntry _ret; |
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1030 |
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1031 int cell_count_global_offset() const { |
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1032 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1033 } |
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1034 |
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1035 // number of cells not counting the header |
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1036 int cell_count_no_header() const { |
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1037 return uint_at(cell_count_global_offset()); |
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1038 } |
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1039 |
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1040 void check_number_of_arguments(int total) { |
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1041 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1042 } |
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1043 |
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1044 public: |
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1045 CallTypeData(DataLayout* layout) : |
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1046 CounterData(layout), |
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1047 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1048 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1049 { |
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1050 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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1051 // Some compilers (VC++) don't want this passed in member initialization list |
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1052 _args.set_profile_data(this); |
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1053 _ret.set_profile_data(this); |
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1054 } |
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1055 |
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1056 const TypeStackSlotEntries* args() const { |
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1057 assert(has_arguments(), "no profiling of arguments"); |
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1058 return &_args; |
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1059 } |
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1060 |
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1061 const ReturnTypeEntry* ret() const { |
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1062 assert(has_return(), "no profiling of return value"); |
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1063 return &_ret; |
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1064 } |
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1065 |
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1066 virtual bool is_CallTypeData() const { return true; } |
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1067 |
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1068 static int static_cell_count() { |
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1069 return -1; |
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1070 } |
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1071 |
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1072 static int compute_cell_count(BytecodeStream* stream) { |
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1073 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1074 } |
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1075 |
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1076 static void initialize(DataLayout* dl, int cell_count) { |
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1077 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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1078 } |
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1079 |
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1080 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1081 |
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1082 virtual int cell_count() const { |
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1083 return CounterData::static_cell_count() + |
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1084 TypeEntriesAtCall::header_cell_count() + |
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1085 int_at_unchecked(cell_count_global_offset()); |
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1086 } |
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1087 |
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1088 int number_of_arguments() const { |
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1089 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1090 } |
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1091 |
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1092 void set_argument_type(int i, Klass* k) { |
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1093 assert(has_arguments(), "no arguments!"); |
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1094 intptr_t current = _args.type(i); |
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1095 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1096 } |
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1097 |
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1098 void set_return_type(Klass* k) { |
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1099 assert(has_return(), "no return!"); |
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1100 intptr_t current = _ret.type(); |
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1101 _ret.set_type(TypeEntries::with_status(k, current)); |
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1102 } |
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1103 |
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1104 // An entry for a return value takes less space than an entry for an |
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1105 // argument so if the number of cells exceeds the number of cells |
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1106 // needed for an argument, this object contains type information for |
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1107 // at least one argument. |
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1108 bool has_arguments() const { |
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1109 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1110 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1111 return res; |
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1112 } |
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1113 |
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1114 // An entry for a return value takes less space than an entry for an |
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1115 // argument, so if the remainder of the number of cells divided by |
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1116 // the number of cells for an argument is not null, a return value |
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1117 // is profiled in this object. |
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1118 bool has_return() const { |
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1119 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1120 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1121 return res; |
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1122 } |
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1123 |
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1124 // Code generation support |
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1125 static ByteSize args_data_offset() { |
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1126 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1127 } |
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1128 |
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1129 // GC support |
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1130 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1131 if (has_arguments()) { |
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1132 _args.clean_weak_klass_links(is_alive_closure); |
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1133 } |
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1134 if (has_return()) { |
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1135 _ret.clean_weak_klass_links(is_alive_closure); |
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1136 } |
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1137 } |
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1138 |
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1139 #ifndef PRODUCT |
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1140 virtual void print_data_on(outputStream* st) const; |
0 | 1141 #endif |
1142 }; | |
1143 | |
1144 // ReceiverTypeData | |
1145 // | |
1146 // A ReceiverTypeData is used to access profiling information about a | |
1147 // dynamic type check. It consists of a counter which counts the total times | |
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1148 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1149 // which are used to store a type profile for the receiver of the check. |
1150 class ReceiverTypeData : public CounterData { | |
1151 protected: | |
1152 enum { | |
1153 receiver0_offset = counter_cell_count, | |
1154 count0_offset, | |
1155 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1156 }; | |
1157 | |
1158 public: | |
1159 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1160 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1161 layout->tag() == DataLayout::virtual_call_data_tag || |
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1162 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1163 } |
1164 | |
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1165 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1166 |
1167 static int static_cell_count() { | |
1168 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
1169 } | |
1170 | |
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1171 virtual int cell_count() const { |
0 | 1172 return static_cell_count(); |
1173 } | |
1174 | |
1175 // Direct accessors | |
1176 static uint row_limit() { | |
1177 return TypeProfileWidth; | |
1178 } | |
1179 static int receiver_cell_index(uint row) { | |
1180 return receiver0_offset + row * receiver_type_row_cell_count; | |
1181 } | |
1182 static int receiver_count_cell_index(uint row) { | |
1183 return count0_offset + row * receiver_type_row_cell_count; | |
1184 } | |
1185 | |
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1186 Klass* receiver(uint row) const { |
0 | 1187 assert(row < row_limit(), "oob"); |
1188 | |
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1189 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1190 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1191 return recv; |
1192 } | |
1193 | |
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1194 void set_receiver(uint row, Klass* k) { |
941 | 1195 assert((uint)row < row_limit(), "oob"); |
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1196 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1197 } |
1198 | |
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1199 uint receiver_count(uint row) const { |
0 | 1200 assert(row < row_limit(), "oob"); |
1201 return uint_at(receiver_count_cell_index(row)); | |
1202 } | |
1203 | |
941 | 1204 void set_receiver_count(uint row, uint count) { |
1205 assert(row < row_limit(), "oob"); | |
1206 set_uint_at(receiver_count_cell_index(row), count); | |
1207 } | |
1208 | |
1209 void clear_row(uint row) { | |
1210 assert(row < row_limit(), "oob"); | |
1251
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1211 // Clear total count - indicator of polymorphic call site. |
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1212 // The site may look like as monomorphic after that but |
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1213 // it allow to have more accurate profiling information because |
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1214 // there was execution phase change since klasses were unloaded. |
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1215 // If the site is still polymorphic then MDO will be updated |
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1216 // to reflect it. But it could be the case that the site becomes |
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1217 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1218 // Even if we use monomorphic (when it is not) for compilation |
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1219 // we will only have trap, deoptimization and recompile again |
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1220 // with updated MDO after executing method in Interpreter. |
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1221 // An additional receiver will be recorded in the cleaned row |
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1222 // during next call execution. |
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1223 // |
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1224 // Note: our profiling logic works with empty rows in any slot. |
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1225 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1226 // |
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1227 set_count(0); |
941 | 1228 set_receiver(row, NULL); |
1229 set_receiver_count(row, 0); | |
1230 } | |
1231 | |
0 | 1232 // Code generation support |
1233 static ByteSize receiver_offset(uint row) { | |
1234 return cell_offset(receiver_cell_index(row)); | |
1235 } | |
1236 static ByteSize receiver_count_offset(uint row) { | |
1237 return cell_offset(receiver_count_cell_index(row)); | |
1238 } | |
1239 static ByteSize receiver_type_data_size() { | |
1240 return cell_offset(static_cell_count()); | |
1241 } | |
1242 | |
1243 // GC support | |
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1244 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1245 |
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1246 #ifdef CC_INTERP |
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1247 static int receiver_type_data_size_in_bytes() { |
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1248 return cell_offset_in_bytes(static_cell_count()); |
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1249 } |
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1250 |
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1251 static Klass *receiver_unchecked(DataLayout* layout, uint row) { |
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1252 Klass* recv = (Klass*)layout->cell_at(receiver_cell_index(row)); |
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1253 return recv; |
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1254 } |
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1255 |
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1256 static void increment_receiver_count_no_overflow(DataLayout* layout, Klass *rcvr) { |
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1257 const int num_rows = row_limit(); |
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1258 // Receiver already exists? |
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1259 for (int row = 0; row < num_rows; row++) { |
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1260 if (receiver_unchecked(layout, row) == rcvr) { |
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1261 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1262 return; |
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1263 } |
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1264 } |
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1265 // New receiver, find a free slot. |
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1266 for (int row = 0; row < num_rows; row++) { |
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1267 if (receiver_unchecked(layout, row) == NULL) { |
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1268 set_intptr_at(layout, receiver_cell_index(row), (intptr_t)rcvr); |
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1269 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1270 return; |
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1271 } |
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1272 } |
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1273 // Receiver did not match any saved receiver and there is no empty row for it. |
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1274 // Increment total counter to indicate polymorphic case. |
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1275 increment_count_no_overflow(layout); |
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1276 } |
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1277 |
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1278 static DataLayout* advance(DataLayout* layout) { |
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1279 return (DataLayout*) (((address)layout) + (ssize_t)ReceiverTypeData::receiver_type_data_size_in_bytes()); |
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1280 } |
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1281 #endif // CC_INTERP |
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1282 |
0 | 1283 #ifndef PRODUCT |
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1284 void print_receiver_data_on(outputStream* st) const; |
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1285 void print_data_on(outputStream* st) const; |
0 | 1286 #endif |
1287 }; | |
1288 | |
1289 // VirtualCallData | |
1290 // | |
1291 // A VirtualCallData is used to access profiling information about a | |
1292 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1293 class VirtualCallData : public ReceiverTypeData { | |
1294 public: | |
1295 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1296 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1297 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1298 } |
1299 | |
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1300 virtual bool is_VirtualCallData() const { return true; } |
0 | 1301 |
1302 static int static_cell_count() { | |
1303 // At this point we could add more profile state, e.g., for arguments. | |
1304 // But for now it's the same size as the base record type. | |
1305 return ReceiverTypeData::static_cell_count(); | |
1306 } | |
1307 | |
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1308 virtual int cell_count() const { |
0 | 1309 return static_cell_count(); |
1310 } | |
1311 | |
1312 // Direct accessors | |
1313 static ByteSize virtual_call_data_size() { | |
1314 return cell_offset(static_cell_count()); | |
1315 } | |
1316 | |
14420
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1317 #ifdef CC_INTERP |
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1318 static int virtual_call_data_size_in_bytes() { |
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1319 return cell_offset_in_bytes(static_cell_count()); |
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1320 } |
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1321 |
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1322 static DataLayout* advance(DataLayout* layout) { |
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1323 return (DataLayout*) (((address)layout) + (ssize_t)VirtualCallData::virtual_call_data_size_in_bytes()); |
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1324 } |
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1325 #endif // CC_INTERP |
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1326 |
0 | 1327 #ifndef PRODUCT |
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1328 void print_data_on(outputStream* st) const; |
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1329 #endif |
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1330 }; |
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1331 |
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1332 // VirtualCallTypeData |
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1333 // |
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1334 // A VirtualCallTypeData is used to access profiling information about |
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1335 // a virtual call for which we collect type information about |
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1336 // arguments and return value. |
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1337 class VirtualCallTypeData : public VirtualCallData { |
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1338 private: |
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1339 // entries for arguments if any |
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1340 TypeStackSlotEntries _args; |
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1341 // entry for return type if any |
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1342 ReturnTypeEntry _ret; |
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1343 |
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1344 int cell_count_global_offset() const { |
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1345 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1346 } |
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1347 |
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1348 // number of cells not counting the header |
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1349 int cell_count_no_header() const { |
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1350 return uint_at(cell_count_global_offset()); |
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1351 } |
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1352 |
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1353 void check_number_of_arguments(int total) { |
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1354 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1355 } |
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1356 |
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1357 public: |
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1358 VirtualCallTypeData(DataLayout* layout) : |
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1359 VirtualCallData(layout), |
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1360 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1361 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1362 { |
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1363 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1364 // Some compilers (VC++) don't want this passed in member initialization list |
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1365 _args.set_profile_data(this); |
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1366 _ret.set_profile_data(this); |
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1367 } |
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1368 |
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1369 const TypeStackSlotEntries* args() const { |
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1370 assert(has_arguments(), "no profiling of arguments"); |
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1371 return &_args; |
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1372 } |
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1373 |
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1374 const ReturnTypeEntry* ret() const { |
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1375 assert(has_return(), "no profiling of return value"); |
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1376 return &_ret; |
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1377 } |
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1378 |
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1379 virtual bool is_VirtualCallTypeData() const { return true; } |
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1380 |
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1381 static int static_cell_count() { |
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1382 return -1; |
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1383 } |
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1384 |
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1385 static int compute_cell_count(BytecodeStream* stream) { |
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1386 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1387 } |
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1388 |
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1389 static void initialize(DataLayout* dl, int cell_count) { |
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1390 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1391 } |
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1392 |
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1393 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1394 |
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1395 virtual int cell_count() const { |
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1396 return VirtualCallData::static_cell_count() + |
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1397 TypeEntriesAtCall::header_cell_count() + |
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1398 int_at_unchecked(cell_count_global_offset()); |
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1399 } |
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1400 |
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1401 int number_of_arguments() const { |
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1402 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1403 } |
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1404 |
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1405 void set_argument_type(int i, Klass* k) { |
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1406 assert(has_arguments(), "no arguments!"); |
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1407 intptr_t current = _args.type(i); |
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1408 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1409 } |
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1410 |
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1411 void set_return_type(Klass* k) { |
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1412 assert(has_return(), "no return!"); |
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1413 intptr_t current = _ret.type(); |
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1414 _ret.set_type(TypeEntries::with_status(k, current)); |
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1415 } |
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1416 |
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1417 // An entry for a return value takes less space than an entry for an |
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1418 // argument, so if the remainder of the number of cells divided by |
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1419 // the number of cells for an argument is not null, a return value |
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1420 // is profiled in this object. |
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1421 bool has_return() const { |
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1422 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1423 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1424 return res; |
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1425 } |
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1426 |
12962
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1427 // An entry for a return value takes less space than an entry for an |
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1428 // argument so if the number of cells exceeds the number of cells |
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1429 // needed for an argument, this object contains type information for |
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1430 // at least one argument. |
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1431 bool has_arguments() const { |
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1432 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1433 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1434 return res; |
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1435 } |
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1436 |
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1437 // Code generation support |
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1438 static ByteSize args_data_offset() { |
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1439 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1440 } |
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1441 |
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1442 // GC support |
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1443 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1444 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1445 if (has_arguments()) { |
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1446 _args.clean_weak_klass_links(is_alive_closure); |
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1447 } |
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1448 if (has_return()) { |
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1449 _ret.clean_weak_klass_links(is_alive_closure); |
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1450 } |
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1451 } |
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1452 |
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1453 #ifndef PRODUCT |
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1454 virtual void print_data_on(outputStream* st) const; |
0 | 1455 #endif |
1456 }; | |
1457 | |
1458 // RetData | |
1459 // | |
1460 // A RetData is used to access profiling information for a ret bytecode. | |
1461 // It is composed of a count of the number of times that the ret has | |
1462 // been executed, followed by a series of triples of the form | |
1463 // (bci, count, di) which count the number of times that some bci was the | |
1464 // target of the ret and cache a corresponding data displacement. | |
1465 class RetData : public CounterData { | |
1466 protected: | |
1467 enum { | |
1468 bci0_offset = counter_cell_count, | |
1469 count0_offset, | |
1470 displacement0_offset, | |
1471 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1472 }; | |
1473 | |
1474 void set_bci(uint row, int bci) { | |
1475 assert((uint)row < row_limit(), "oob"); | |
1476 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1477 } | |
1478 void release_set_bci(uint row, int bci) { | |
1479 assert((uint)row < row_limit(), "oob"); | |
1480 // 'release' when setting the bci acts as a valid flag for other | |
1481 // threads wrt bci_count and bci_displacement. | |
1482 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1483 } | |
1484 void set_bci_count(uint row, uint count) { | |
1485 assert((uint)row < row_limit(), "oob"); | |
1486 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1487 } | |
1488 void set_bci_displacement(uint row, int disp) { | |
1489 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1490 } | |
1491 | |
1492 public: | |
1493 RetData(DataLayout* layout) : CounterData(layout) { | |
1494 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1495 } | |
1496 | |
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1497 virtual bool is_RetData() const { return true; } |
0 | 1498 |
1499 enum { | |
1500 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1501 }; | |
1502 | |
1503 static int static_cell_count() { | |
1504 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1505 } | |
1506 | |
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1507 virtual int cell_count() const { |
0 | 1508 return static_cell_count(); |
1509 } | |
1510 | |
1511 static uint row_limit() { | |
1512 return BciProfileWidth; | |
1513 } | |
1514 static int bci_cell_index(uint row) { | |
1515 return bci0_offset + row * ret_row_cell_count; | |
1516 } | |
1517 static int bci_count_cell_index(uint row) { | |
1518 return count0_offset + row * ret_row_cell_count; | |
1519 } | |
1520 static int bci_displacement_cell_index(uint row) { | |
1521 return displacement0_offset + row * ret_row_cell_count; | |
1522 } | |
1523 | |
1524 // Direct accessors | |
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1525 int bci(uint row) const { |
0 | 1526 return int_at(bci_cell_index(row)); |
1527 } | |
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1528 uint bci_count(uint row) const { |
0 | 1529 return uint_at(bci_count_cell_index(row)); |
1530 } | |
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1531 int bci_displacement(uint row) const { |
0 | 1532 return int_at(bci_displacement_cell_index(row)); |
1533 } | |
1534 | |
1535 // Interpreter Runtime support | |
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1536 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1537 |
1538 // Code generation support | |
1539 static ByteSize bci_offset(uint row) { | |
1540 return cell_offset(bci_cell_index(row)); | |
1541 } | |
1542 static ByteSize bci_count_offset(uint row) { | |
1543 return cell_offset(bci_count_cell_index(row)); | |
1544 } | |
1545 static ByteSize bci_displacement_offset(uint row) { | |
1546 return cell_offset(bci_displacement_cell_index(row)); | |
1547 } | |
1548 | |
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1549 #ifdef CC_INTERP |
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1550 static DataLayout* advance(MethodData *md, int bci); |
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1551 #endif // CC_INTERP |
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1552 |
0 | 1553 // Specific initialization. |
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1554 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1555 |
1556 #ifndef PRODUCT | |
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1557 void print_data_on(outputStream* st) const; |
0 | 1558 #endif |
1559 }; | |
1560 | |
1561 // BranchData | |
1562 // | |
1563 // A BranchData is used to access profiling data for a two-way branch. | |
1564 // It consists of taken and not_taken counts as well as a data displacement | |
1565 // for the taken case. | |
1566 class BranchData : public JumpData { | |
1567 protected: | |
1568 enum { | |
1569 not_taken_off_set = jump_cell_count, | |
1570 branch_cell_count | |
1571 }; | |
1572 | |
1573 void set_displacement(int displacement) { | |
1574 set_int_at(displacement_off_set, displacement); | |
1575 } | |
1576 | |
1577 public: | |
1578 BranchData(DataLayout* layout) : JumpData(layout) { | |
1579 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1580 } | |
1581 | |
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1582 virtual bool is_BranchData() const { return true; } |
0 | 1583 |
1584 static int static_cell_count() { | |
1585 return branch_cell_count; | |
1586 } | |
1587 | |
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1588 virtual int cell_count() const { |
0 | 1589 return static_cell_count(); |
1590 } | |
1591 | |
1592 // Direct accessor | |
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1593 uint not_taken() const { |
0 | 1594 return uint_at(not_taken_off_set); |
1595 } | |
1596 | |
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1597 void set_not_taken(uint cnt) { |
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1598 set_uint_at(not_taken_off_set, cnt); |
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1599 } |
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1600 |
0 | 1601 uint inc_not_taken() { |
1602 uint cnt = not_taken() + 1; | |
1603 // Did we wrap? Will compiler screw us?? | |
1604 if (cnt == 0) cnt--; | |
1605 set_uint_at(not_taken_off_set, cnt); | |
1606 return cnt; | |
1607 } | |
1608 | |
1609 // Code generation support | |
1610 static ByteSize not_taken_offset() { | |
1611 return cell_offset(not_taken_off_set); | |
1612 } | |
1613 static ByteSize branch_data_size() { | |
1614 return cell_offset(branch_cell_count); | |
1615 } | |
1616 | |
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1617 #ifdef CC_INTERP |
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1618 static int branch_data_size_in_bytes() { |
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1619 return cell_offset_in_bytes(branch_cell_count); |
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1620 } |
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1621 |
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1622 static void increment_not_taken_count_no_overflow(DataLayout* layout) { |
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1623 increment_uint_at_no_overflow(layout, not_taken_off_set); |
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1624 } |
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1625 |
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1626 static DataLayout* advance_not_taken(DataLayout* layout) { |
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1627 return (DataLayout*) (((address)layout) + (ssize_t)BranchData::branch_data_size_in_bytes()); |
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1628 } |
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1629 #endif // CC_INTERP |
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1630 |
0 | 1631 // Specific initialization. |
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1632 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1633 |
1634 #ifndef PRODUCT | |
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1635 void print_data_on(outputStream* st) const; |
0 | 1636 #endif |
1637 }; | |
1638 | |
1639 // ArrayData | |
1640 // | |
1641 // A ArrayData is a base class for accessing profiling data which does | |
1642 // not have a statically known size. It consists of an array length | |
1643 // and an array start. | |
1644 class ArrayData : public ProfileData { | |
1645 protected: | |
1646 friend class DataLayout; | |
1647 | |
1648 enum { | |
1649 array_len_off_set, | |
1650 array_start_off_set | |
1651 }; | |
1652 | |
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1653 uint array_uint_at(int index) const { |
0 | 1654 int aindex = index + array_start_off_set; |
1655 return uint_at(aindex); | |
1656 } | |
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1657 int array_int_at(int index) const { |
0 | 1658 int aindex = index + array_start_off_set; |
1659 return int_at(aindex); | |
1660 } | |
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1661 oop array_oop_at(int index) const { |
0 | 1662 int aindex = index + array_start_off_set; |
1663 return oop_at(aindex); | |
1664 } | |
1665 void array_set_int_at(int index, int value) { | |
1666 int aindex = index + array_start_off_set; | |
1667 set_int_at(aindex, value); | |
1668 } | |
1669 | |
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1670 #ifdef CC_INTERP |
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1671 // Static low level accessors for DataLayout with ArrayData's semantics. |
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1672 |
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1673 static void increment_array_uint_at_no_overflow(DataLayout* layout, int index) { |
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1674 int aindex = index + array_start_off_set; |
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1675 increment_uint_at_no_overflow(layout, aindex); |
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1676 } |
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1677 |
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1678 static int array_int_at(DataLayout* layout, int index) { |
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1679 int aindex = index + array_start_off_set; |
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1680 return int_at(layout, aindex); |
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1681 } |
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1682 #endif // CC_INTERP |
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1683 |
0 | 1684 // Code generation support for subclasses. |
1685 static ByteSize array_element_offset(int index) { | |
1686 return cell_offset(array_start_off_set + index); | |
1687 } | |
1688 | |
1689 public: | |
1690 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1691 | |
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1692 virtual bool is_ArrayData() const { return true; } |
0 | 1693 |
1694 static int static_cell_count() { | |
1695 return -1; | |
1696 } | |
1697 | |
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1698 int array_len() const { |
0 | 1699 return int_at_unchecked(array_len_off_set); |
1700 } | |
1701 | |
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1702 virtual int cell_count() const { |
0 | 1703 return array_len() + 1; |
1704 } | |
1705 | |
1706 // Code generation support | |
1707 static ByteSize array_len_offset() { | |
1708 return cell_offset(array_len_off_set); | |
1709 } | |
1710 static ByteSize array_start_offset() { | |
1711 return cell_offset(array_start_off_set); | |
1712 } | |
1713 }; | |
1714 | |
1715 // MultiBranchData | |
1716 // | |
1717 // A MultiBranchData is used to access profiling information for | |
1718 // a multi-way branch (*switch bytecodes). It consists of a series | |
1719 // of (count, displacement) pairs, which count the number of times each | |
1720 // case was taken and specify the data displacment for each branch target. | |
1721 class MultiBranchData : public ArrayData { | |
1722 protected: | |
1723 enum { | |
1724 default_count_off_set, | |
1725 default_disaplacement_off_set, | |
1726 case_array_start | |
1727 }; | |
1728 enum { | |
1729 relative_count_off_set, | |
1730 relative_displacement_off_set, | |
1731 per_case_cell_count | |
1732 }; | |
1733 | |
1734 void set_default_displacement(int displacement) { | |
1735 array_set_int_at(default_disaplacement_off_set, displacement); | |
1736 } | |
1737 void set_displacement_at(int index, int displacement) { | |
1738 array_set_int_at(case_array_start + | |
1739 index * per_case_cell_count + | |
1740 relative_displacement_off_set, | |
1741 displacement); | |
1742 } | |
1743 | |
1744 public: | |
1745 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1746 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1747 } | |
1748 | |
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1749 virtual bool is_MultiBranchData() const { return true; } |
0 | 1750 |
1751 static int compute_cell_count(BytecodeStream* stream); | |
1752 | |
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1753 int number_of_cases() const { |
0 | 1754 int alen = array_len() - 2; // get rid of default case here. |
1755 assert(alen % per_case_cell_count == 0, "must be even"); | |
1756 return (alen / per_case_cell_count); | |
1757 } | |
1758 | |
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1759 uint default_count() const { |
0 | 1760 return array_uint_at(default_count_off_set); |
1761 } | |
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1762 int default_displacement() const { |
0 | 1763 return array_int_at(default_disaplacement_off_set); |
1764 } | |
1765 | |
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1766 uint count_at(int index) const { |
0 | 1767 return array_uint_at(case_array_start + |
1768 index * per_case_cell_count + | |
1769 relative_count_off_set); | |
1770 } | |
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1771 int displacement_at(int index) const { |
0 | 1772 return array_int_at(case_array_start + |
1773 index * per_case_cell_count + | |
1774 relative_displacement_off_set); | |
1775 } | |
1776 | |
1777 // Code generation support | |
1778 static ByteSize default_count_offset() { | |
1779 return array_element_offset(default_count_off_set); | |
1780 } | |
1781 static ByteSize default_displacement_offset() { | |
1782 return array_element_offset(default_disaplacement_off_set); | |
1783 } | |
1784 static ByteSize case_count_offset(int index) { | |
1785 return case_array_offset() + | |
1786 (per_case_size() * index) + | |
1787 relative_count_offset(); | |
1788 } | |
1789 static ByteSize case_array_offset() { | |
1790 return array_element_offset(case_array_start); | |
1791 } | |
1792 static ByteSize per_case_size() { | |
1793 return in_ByteSize(per_case_cell_count) * cell_size; | |
1794 } | |
1795 static ByteSize relative_count_offset() { | |
1796 return in_ByteSize(relative_count_off_set) * cell_size; | |
1797 } | |
1798 static ByteSize relative_displacement_offset() { | |
1799 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1800 } | |
1801 | |
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1802 #ifdef CC_INTERP |
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1803 static void increment_count_no_overflow(DataLayout* layout, int index) { |
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1804 if (index == -1) { |
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1805 increment_array_uint_at_no_overflow(layout, default_count_off_set); |
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1806 } else { |
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1807 increment_array_uint_at_no_overflow(layout, case_array_start + |
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1808 index * per_case_cell_count + |
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1809 relative_count_off_set); |
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1810 } |
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1811 } |
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1812 |
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1813 static DataLayout* advance(DataLayout* layout, int index) { |
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1814 if (index == -1) { |
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1815 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, default_disaplacement_off_set)); |
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1816 } else { |
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1817 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, case_array_start + |
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1818 index * per_case_cell_count + |
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1819 relative_displacement_off_set)); |
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1820 } |
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1821 } |
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1822 #endif // CC_INTERP |
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1823 |
0 | 1824 // Specific initialization. |
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1825 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1826 |
1827 #ifndef PRODUCT | |
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1828 void print_data_on(outputStream* st) const; |
0 | 1829 #endif |
1830 }; | |
1831 | |
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1832 class ArgInfoData : public ArrayData { |
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1833 |
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1834 public: |
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1835 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1836 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1837 } |
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1838 |
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1839 virtual bool is_ArgInfoData() const { return true; } |
45
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1840 |
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1841 |
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1842 int number_of_args() const { |
45
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1843 return array_len(); |
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1844 } |
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1845 |
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1846 uint arg_modified(int arg) const { |
45
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1847 return array_uint_at(arg); |
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1848 } |
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1849 |
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1850 void set_arg_modified(int arg, uint val) { |
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1851 array_set_int_at(arg, val); |
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1852 } |
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1853 |
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1854 #ifndef PRODUCT |
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1855 void print_data_on(outputStream* st) const; |
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1856 #endif |
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1857 }; |
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1858 |
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1859 // ParametersTypeData |
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1860 // |
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1861 // A ParametersTypeData is used to access profiling information about |
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1862 // types of parameters to a method |
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1863 class ParametersTypeData : public ArrayData { |
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1864 |
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1865 private: |
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1866 TypeStackSlotEntries _parameters; |
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1867 |
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1868 static int stack_slot_local_offset(int i) { |
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1869 assert_profiling_enabled(); |
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1870 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1871 } |
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1872 |
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1873 static int type_local_offset(int i) { |
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1874 assert_profiling_enabled(); |
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1875 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1876 } |
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1877 |
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1878 static bool profiling_enabled(); |
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1879 static void assert_profiling_enabled() { |
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1880 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1881 } |
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1882 |
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1883 public: |
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1884 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1885 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1886 // Some compilers (VC++) don't want this passed in member initialization list |
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1887 _parameters.set_profile_data(this); |
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1888 } |
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1889 |
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1890 static int compute_cell_count(Method* m); |
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1891 |
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1892 virtual bool is_ParametersTypeData() const { return true; } |
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1893 |
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1894 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1895 |
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1896 int number_of_parameters() const { |
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1897 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1898 } |
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1899 |
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1900 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1901 |
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1902 uint stack_slot(int i) const { |
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1903 return _parameters.stack_slot(i); |
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1904 } |
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1905 |
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1906 void set_type(int i, Klass* k) { |
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1907 intptr_t current = _parameters.type(i); |
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1908 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1909 } |
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1910 |
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1911 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1912 _parameters.clean_weak_klass_links(is_alive_closure); |
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1913 } |
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1914 |
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1915 #ifndef PRODUCT |
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1916 virtual void print_data_on(outputStream* st) const; |
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1917 #endif |
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1918 |
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1919 static ByteSize stack_slot_offset(int i) { |
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1920 return cell_offset(stack_slot_local_offset(i)); |
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1921 } |
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1922 |
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1923 static ByteSize type_offset(int i) { |
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1924 return cell_offset(type_local_offset(i)); |
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1925 } |
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1926 }; |
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1927 |
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1928 // MethodData* |
0 | 1929 // |
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1930 // A MethodData* holds information which has been collected about |
0 | 1931 // a method. Its layout looks like this: |
1932 // | |
1933 // ----------------------------- | |
1934 // | header | | |
1935 // | klass | | |
1936 // ----------------------------- | |
1937 // | method | | |
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1938 // | size of the MethodData* | |
0 | 1939 // ----------------------------- |
1940 // | Data entries... | | |
1941 // | (variable size) | | |
1942 // | | | |
1943 // . . | |
1944 // . . | |
1945 // . . | |
1946 // | | | |
1947 // ----------------------------- | |
1948 // | |
1949 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1950 // DataLayout in the array corresponds to a specific bytecode in the | |
1951 // method. The entries in the array are sorted by the corresponding | |
1952 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1953 // which point to the underlying blocks of DataLayout structures. | |
1954 // | |
1955 // During interpretation, if profiling in enabled, the interpreter | |
1956 // maintains a method data pointer (mdp), which points at the entry | |
1957 // in the array corresponding to the current bci. In the course of | |
1958 // intepretation, when a bytecode is encountered that has profile data | |
1959 // associated with it, the entry pointed to by mdp is updated, then the | |
1960 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1961 // is NULL to begin with, the interpreter assumes that the current method | |
1962 // is not (yet) being profiled. | |
1963 // | |
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1964 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1965 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1966 // from the base of the data entry array. A "displacement" is the byte offset | |
1967 // in certain ProfileData objects that indicate the amount the mdp must be | |
1968 // adjusted in the event of a change in control flow. | |
1969 // | |
1970 | |
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1971 CC_INTERP_ONLY(class BytecodeInterpreter;) |
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1972 |
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1973 class MethodData : public Metadata { |
0 | 1974 friend class VMStructs; |
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1975 CC_INTERP_ONLY(friend class BytecodeInterpreter;) |
0 | 1976 private: |
1977 friend class ProfileData; | |
1978 | |
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1979 // Back pointer to the Method* |
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1980 Method* _method; |
0 | 1981 |
1982 // Size of this oop in bytes | |
1983 int _size; | |
1984 | |
1985 // Cached hint for bci_to_dp and bci_to_data | |
1986 int _hint_di; | |
1987 | |
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1988 MethodData(methodHandle method, int size, TRAPS); |
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1989 public: |
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1990 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1991 MethodData() {}; // For ciMethodData |
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1992 |
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1993 bool is_methodData() const volatile { return true; } |
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1994 |
0 | 1995 // Whole-method sticky bits and flags |
1996 enum { | |
3345 | 1997 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1998 _trap_hist_mask = max_jubyte, |
1999 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
2000 }; // Public flag values | |
2001 private: | |
2002 uint _nof_decompiles; // count of all nmethod removals | |
2003 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
2004 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
2005 union { | |
2006 intptr_t _align; | |
2007 u1 _array[_trap_hist_limit]; | |
2008 } _trap_hist; | |
2009 | |
2010 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2011 intx _eflags; // flags on escape information | |
2012 intx _arg_local; // bit set of non-escaping arguments | |
2013 intx _arg_stack; // bit set of stack-allocatable arguments | |
2014 intx _arg_returned; // bit set of returned arguments | |
2015 | |
1783 | 2016 int _creation_mileage; // method mileage at MDO creation |
2017 | |
2018 // How many invocations has this MDO seen? | |
2019 // These counters are used to determine the exact age of MDO. | |
2020 // We need those because in tiered a method can be concurrently | |
2021 // executed at different levels. | |
2022 InvocationCounter _invocation_counter; | |
2023 // Same for backedges. | |
2024 InvocationCounter _backedge_counter; | |
2252 | 2025 // Counter values at the time profiling started. |
2026 int _invocation_counter_start; | |
2027 int _backedge_counter_start; | |
1783 | 2028 // Number of loops and blocks is computed when compiling the first |
2029 // time with C1. It is used to determine if method is trivial. | |
2030 short _num_loops; | |
2031 short _num_blocks; | |
2032 // Highest compile level this method has ever seen. | |
2033 u1 _highest_comp_level; | |
2034 // Same for OSR level | |
2035 u1 _highest_osr_comp_level; | |
2036 // Does this method contain anything worth profiling? | |
2037 bool _would_profile; | |
0 | 2038 |
2039 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
2040 int _data_size; | |
2041 | |
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2042 // data index for the area dedicated to parameters. -1 if no |
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2043 // parameter profiling. |
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2044 int _parameters_type_data_di; |
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2045 |
0 | 2046 // Beginning of the data entries |
2047 intptr_t _data[1]; | |
2048 | |
2049 // Helper for size computation | |
2050 static int compute_data_size(BytecodeStream* stream); | |
2051 static int bytecode_cell_count(Bytecodes::Code code); | |
2052 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
2053 | |
2054 // Helper for initialization | |
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2055 DataLayout* data_layout_at(int data_index) const { |
0 | 2056 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
2057 return (DataLayout*) (((address)_data) + data_index); | |
2058 } | |
2059 | |
2060 // Initialize an individual data segment. Returns the size of | |
2061 // the segment in bytes. | |
2062 int initialize_data(BytecodeStream* stream, int data_index); | |
2063 | |
2064 // Helper for data_at | |
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2065 DataLayout* limit_data_position() const { |
0 | 2066 return (DataLayout*)((address)data_base() + _data_size); |
2067 } | |
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2068 bool out_of_bounds(int data_index) const { |
0 | 2069 return data_index >= data_size(); |
2070 } | |
2071 | |
2072 // Give each of the data entries a chance to perform specific | |
2073 // data initialization. | |
2074 void post_initialize(BytecodeStream* stream); | |
2075 | |
2076 // hint accessors | |
2077 int hint_di() const { return _hint_di; } | |
2078 void set_hint_di(int di) { | |
2079 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
2080 _hint_di = di; | |
2081 } | |
2082 ProfileData* data_before(int bci) { | |
2083 // avoid SEGV on this edge case | |
2084 if (data_size() == 0) | |
2085 return NULL; | |
2086 int hint = hint_di(); | |
2087 if (data_layout_at(hint)->bci() <= bci) | |
2088 return data_at(hint); | |
2089 return first_data(); | |
2090 } | |
2091 | |
2092 // What is the index of the first data entry? | |
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2093 int first_di() const { return 0; } |
0 | 2094 |
2095 // Find or create an extra ProfileData: | |
2096 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
2097 | |
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2098 // return the argument info cell |
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2099 ArgInfoData *arg_info(); |
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2100 |
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2101 enum { |
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2102 no_type_profile = 0, |
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2103 type_profile_jsr292 = 1, |
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2104 type_profile_all = 2 |
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2105 }; |
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2106 |
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2107 static bool profile_jsr292(methodHandle m, int bci); |
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2108 static int profile_arguments_flag(); |
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2109 static bool profile_arguments_jsr292_only(); |
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2110 static bool profile_all_arguments(); |
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2111 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2112 static int profile_return_flag(); |
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2113 static bool profile_all_return(); |
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2114 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2115 static int profile_parameters_flag(); |
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2116 static bool profile_parameters_jsr292_only(); |
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2117 static bool profile_all_parameters(); |
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2118 |
0 | 2119 public: |
2120 static int header_size() { | |
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2121 return sizeof(MethodData)/wordSize; |
0 | 2122 } |
2123 | |
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2124 // Compute the size of a MethodData* before it is created. |
0 | 2125 static int compute_allocation_size_in_bytes(methodHandle method); |
2126 static int compute_allocation_size_in_words(methodHandle method); | |
2127 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
2128 | |
2129 // Determine if a given bytecode can have profile information. | |
2130 static bool bytecode_has_profile(Bytecodes::Code code) { | |
2131 return bytecode_cell_count(code) != no_profile_data; | |
2132 } | |
2133 | |
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2134 // reset into original state |
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2135 void init(); |
0 | 2136 |
2137 // My size | |
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2138 int size_in_bytes() const { return _size; } |
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2139 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 2140 #if INCLUDE_SERVICES |
2141 void collect_statistics(KlassSizeStats *sz) const; | |
2142 #endif | |
0 | 2143 |
2144 int creation_mileage() const { return _creation_mileage; } | |
2145 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 2146 |
2147 int invocation_count() { | |
2148 if (invocation_counter()->carry()) { | |
2149 return InvocationCounter::count_limit; | |
2150 } | |
2151 return invocation_counter()->count(); | |
2152 } | |
2153 int backedge_count() { | |
2154 if (backedge_counter()->carry()) { | |
2155 return InvocationCounter::count_limit; | |
2156 } | |
2157 return backedge_counter()->count(); | |
2158 } | |
2159 | |
2252 | 2160 int invocation_count_start() { |
2161 if (invocation_counter()->carry()) { | |
2162 return 0; | |
2163 } | |
2164 return _invocation_counter_start; | |
2165 } | |
2166 | |
2167 int backedge_count_start() { | |
2168 if (backedge_counter()->carry()) { | |
2169 return 0; | |
2170 } | |
2171 return _backedge_counter_start; | |
2172 } | |
2173 | |
2174 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
2175 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
2176 | |
2177 void reset_start_counters() { | |
2178 _invocation_counter_start = invocation_count(); | |
2179 _backedge_counter_start = backedge_count(); | |
2180 } | |
2181 | |
1783 | 2182 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
2183 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
2184 | |
2185 void set_would_profile(bool p) { _would_profile = p; } | |
2186 bool would_profile() const { return _would_profile; } | |
2187 | |
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2188 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 2189 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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2190 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2191 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2192 | |
2193 int num_loops() const { return _num_loops; } | |
2194 void set_num_loops(int n) { _num_loops = n; } | |
2195 int num_blocks() const { return _num_blocks; } | |
2196 void set_num_blocks(int n) { _num_blocks = n; } | |
2197 | |
0 | 2198 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2199 static int mileage_of(Method* m); |
0 | 2200 |
2201 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2202 enum EscapeFlag { | |
2203 estimated = 1 << 0, | |
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2204 return_local = 1 << 1, |
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2205 return_allocated = 1 << 2, |
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2206 allocated_escapes = 1 << 3, |
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2207 unknown_modified = 1 << 4 |
0 | 2208 }; |
2209 | |
2210 intx eflags() { return _eflags; } | |
2211 intx arg_local() { return _arg_local; } | |
2212 intx arg_stack() { return _arg_stack; } | |
2213 intx arg_returned() { return _arg_returned; } | |
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2214 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2215 assert(aid != NULL, "arg_info must be not null"); |
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2216 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2217 return aid->arg_modified(a); } |
0 | 2218 |
2219 void set_eflags(intx v) { _eflags = v; } | |
2220 void set_arg_local(intx v) { _arg_local = v; } | |
2221 void set_arg_stack(intx v) { _arg_stack = v; } | |
2222 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2223 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2224 assert(aid != NULL, "arg_info must be not null"); |
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2225 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2226 aid->set_arg_modified(a, v); } |
0 | 2227 |
2228 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2229 | |
2230 // Location and size of data area | |
2231 address data_base() const { | |
2232 return (address) _data; | |
2233 } | |
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2234 int data_size() const { |
0 | 2235 return _data_size; |
2236 } | |
2237 | |
2238 // Accessors | |
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2239 Method* method() const { return _method; } |
0 | 2240 |
2241 // Get the data at an arbitrary (sort of) data index. | |
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2242 ProfileData* data_at(int data_index) const; |
0 | 2243 |
2244 // Walk through the data in order. | |
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2245 ProfileData* first_data() const { return data_at(first_di()); } |
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2246 ProfileData* next_data(ProfileData* current) const; |
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2247 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2248 |
2249 // Convert a dp (data pointer) to a di (data index). | |
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2250 int dp_to_di(address dp) const { |
0 | 2251 return dp - ((address)_data); |
2252 } | |
2253 | |
2254 address di_to_dp(int di) { | |
2255 return (address)data_layout_at(di); | |
2256 } | |
2257 | |
2258 // bci to di/dp conversion. | |
2259 address bci_to_dp(int bci); | |
2260 int bci_to_di(int bci) { | |
2261 return dp_to_di(bci_to_dp(bci)); | |
2262 } | |
2263 | |
2264 // Get the data at an arbitrary bci, or NULL if there is none. | |
2265 ProfileData* bci_to_data(int bci); | |
2266 | |
2267 // Same, but try to create an extra_data record if one is needed: | |
2268 ProfileData* allocate_bci_to_data(int bci) { | |
2269 ProfileData* data = bci_to_data(bci); | |
2270 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
2271 } | |
2272 | |
2273 // Add a handful of extra data records, for trap tracking. | |
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2274 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2275 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2276 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2277 - (address)extra_data_base(); } |
2278 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
2279 | |
2280 // Return (uint)-1 for overflow. | |
2281 uint trap_count(int reason) const { | |
2282 assert((uint)reason < _trap_hist_limit, "oob"); | |
2283 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2284 } | |
2285 // For loops: | |
2286 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2287 static uint trap_count_limit() { return _trap_hist_mask; } | |
2288 uint inc_trap_count(int reason) { | |
2289 // Count another trap, anywhere in this method. | |
2290 assert(reason >= 0, "must be single trap"); | |
2291 if ((uint)reason < _trap_hist_limit) { | |
2292 uint cnt1 = 1 + _trap_hist._array[reason]; | |
2293 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
2294 _trap_hist._array[reason] = cnt1; | |
2295 return cnt1; | |
2296 } else { | |
2297 return _trap_hist_mask + (++_nof_overflow_traps); | |
2298 } | |
2299 } else { | |
2300 // Could not represent the count in the histogram. | |
2301 return (++_nof_overflow_traps); | |
2302 } | |
2303 } | |
2304 | |
2305 uint overflow_trap_count() const { | |
2306 return _nof_overflow_traps; | |
2307 } | |
2308 uint overflow_recompile_count() const { | |
2309 return _nof_overflow_recompiles; | |
2310 } | |
2311 void inc_overflow_recompile_count() { | |
2312 _nof_overflow_recompiles += 1; | |
2313 } | |
2314 uint decompile_count() const { | |
2315 return _nof_decompiles; | |
2316 } | |
2317 void inc_decompile_count() { | |
2318 _nof_decompiles += 1; | |
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2319 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2320 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2321 } |
0 | 2322 } |
2323 | |
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2324 // Return pointer to area dedicated to parameters in MDO |
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2325 ParametersTypeData* parameters_type_data() const { |
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2326 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2327 } |
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2328 |
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2329 int parameters_type_data_di() const { |
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2330 assert(_parameters_type_data_di != -1, "no args type data"); |
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2331 return _parameters_type_data_di; |
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2332 } |
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2333 |
0 | 2334 // Support for code generation |
2335 static ByteSize data_offset() { | |
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2336 return byte_offset_of(MethodData, _data[0]); |
0 | 2337 } |
2338 | |
1783 | 2339 static ByteSize invocation_counter_offset() { |
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2340 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2341 } |
2342 static ByteSize backedge_counter_offset() { | |
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2343 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2344 } |
2345 | |
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2346 static ByteSize parameters_type_data_di_offset() { |
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2347 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2348 } |
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2349 |
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2350 // Deallocation support - no pointer fields to deallocate |
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2351 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2352 |
0 | 2353 // GC support |
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2354 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2355 |
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2356 // Printing |
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2357 #ifndef PRODUCT |
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2358 void print_on (outputStream* st) const; |
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2359 #endif |
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2360 void print_value_on(outputStream* st) const; |
0 | 2361 |
2362 #ifndef PRODUCT | |
2363 // printing support for method data | |
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2364 void print_data_on(outputStream* st) const; |
0 | 2365 #endif |
2366 | |
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2367 const char* internal_name() const { return "{method data}"; } |
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2368 |
0 | 2369 // verification |
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2370 void verify_on(outputStream* st); |
0 | 2371 void verify_data_on(outputStream* st); |
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2372 |
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2373 static bool profile_parameters_for_method(methodHandle m); |
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2374 static bool profile_arguments(); |
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2375 static bool profile_return(); |
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2376 static bool profile_parameters(); |
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2377 static bool profile_return_jsr292_only(); |
0 | 2378 }; |
1972 | 2379 |
2380 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |