Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/methodData.hpp @ 12882:ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
Summary: x86 interpreter and c1 type profiling for return values at calls
Reviewed-by: kvn, twisti
author | roland |
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date | Sat, 12 Oct 2013 12:12:59 +0200 |
parents | d13d7aba8c12 |
children | 5ccbab1c69f3 |
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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 |
0 | 123 }; |
124 | |
125 enum { | |
126 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
127 // The trap state breaks down further as [recompile:1 | reason:3]. | |
128 // This further breakdown is defined in deoptimization.cpp. | |
129 // See Deoptimization::trap_state_reason for an assert that | |
130 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
131 // | |
132 // The trap_state is collected only if ProfileTraps is true. | |
133 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
134 trap_shift = BitsPerByte - trap_bits, | |
135 trap_mask = right_n_bits(trap_bits), | |
136 trap_mask_in_place = (trap_mask << trap_shift), | |
137 flag_limit = trap_shift, | |
138 flag_mask = right_n_bits(flag_limit), | |
139 first_flag = 0 | |
140 }; | |
141 | |
142 // Size computation | |
143 static int header_size_in_bytes() { | |
144 return cell_size; | |
145 } | |
146 static int header_size_in_cells() { | |
147 return 1; | |
148 } | |
149 | |
150 static int compute_size_in_bytes(int cell_count) { | |
151 return header_size_in_bytes() + cell_count * cell_size; | |
152 } | |
153 | |
154 // Initialization | |
155 void initialize(u1 tag, u2 bci, int cell_count); | |
156 | |
157 // Accessors | |
158 u1 tag() { | |
159 return _header._struct._tag; | |
160 } | |
161 | |
162 // Return a few bits of trap state. Range is [0..trap_mask]. | |
163 // The state tells if traps with zero, one, or many reasons have occurred. | |
164 // It also tells whether zero or many recompilations have occurred. | |
165 // The associated trap histogram in the MDO itself tells whether | |
166 // traps are common or not. If a BCI shows that a trap X has | |
167 // occurred, and the MDO shows N occurrences of X, we make the | |
168 // simplifying assumption that all N occurrences can be blamed | |
169 // on that BCI. | |
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170 int trap_state() const { |
0 | 171 return ((_header._struct._flags >> trap_shift) & trap_mask); |
172 } | |
173 | |
174 void set_trap_state(int new_state) { | |
175 assert(ProfileTraps, "used only under +ProfileTraps"); | |
176 uint old_flags = (_header._struct._flags & flag_mask); | |
177 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
178 } | |
179 | |
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180 u1 flags() const { |
0 | 181 return _header._struct._flags; |
182 } | |
183 | |
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184 u2 bci() const { |
0 | 185 return _header._struct._bci; |
186 } | |
187 | |
188 void set_header(intptr_t value) { | |
189 _header._bits = value; | |
190 } | |
191 void release_set_header(intptr_t value) { | |
192 OrderAccess::release_store_ptr(&_header._bits, value); | |
193 } | |
194 intptr_t header() { | |
195 return _header._bits; | |
196 } | |
197 void set_cell_at(int index, intptr_t value) { | |
198 _cells[index] = value; | |
199 } | |
200 void release_set_cell_at(int index, intptr_t value) { | |
201 OrderAccess::release_store_ptr(&_cells[index], value); | |
202 } | |
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203 intptr_t cell_at(int index) const { |
0 | 204 return _cells[index]; |
205 } | |
206 | |
207 void set_flag_at(int flag_number) { | |
208 assert(flag_number < flag_limit, "oob"); | |
209 _header._struct._flags |= (0x1 << flag_number); | |
210 } | |
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211 bool flag_at(int flag_number) const { |
0 | 212 assert(flag_number < flag_limit, "oob"); |
213 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
214 } | |
215 | |
216 // Low-level support for code generation. | |
217 static ByteSize header_offset() { | |
218 return byte_offset_of(DataLayout, _header); | |
219 } | |
220 static ByteSize tag_offset() { | |
221 return byte_offset_of(DataLayout, _header._struct._tag); | |
222 } | |
223 static ByteSize flags_offset() { | |
224 return byte_offset_of(DataLayout, _header._struct._flags); | |
225 } | |
226 static ByteSize bci_offset() { | |
227 return byte_offset_of(DataLayout, _header._struct._bci); | |
228 } | |
229 static ByteSize cell_offset(int index) { | |
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230 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 231 } |
232 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
233 static int flag_number_to_byte_constant(int flag_number) { | |
234 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
235 DataLayout temp; temp.set_header(0); | |
236 temp.set_flag_at(flag_number); | |
237 return temp._header._struct._flags; | |
238 } | |
239 // Return a value which, when or-ed as a word into _header, sets the flag. | |
240 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
241 DataLayout temp; temp.set_header(0); | |
242 temp._header._struct._flags = byte_constant; | |
243 return temp._header._bits; | |
244 } | |
941 | 245 |
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246 ProfileData* data_in(); |
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247 |
941 | 248 // GC support |
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249 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 250 }; |
251 | |
252 | |
253 // ProfileData class hierarchy | |
254 class ProfileData; | |
255 class BitData; | |
256 class CounterData; | |
257 class ReceiverTypeData; | |
258 class VirtualCallData; | |
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259 class VirtualCallTypeData; |
0 | 260 class RetData; |
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261 class CallTypeData; |
0 | 262 class JumpData; |
263 class BranchData; | |
264 class ArrayData; | |
265 class MultiBranchData; | |
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266 class ArgInfoData; |
0 | 267 |
268 // ProfileData | |
269 // | |
270 // A ProfileData object is created to refer to a section of profiling | |
271 // data in a structured way. | |
272 class ProfileData : public ResourceObj { | |
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273 friend class TypeEntries; |
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274 friend class ReturnTypeEntry; |
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275 friend class TypeStackSlotEntries; |
0 | 276 private: |
277 #ifndef PRODUCT | |
278 enum { | |
279 tab_width_one = 16, | |
280 tab_width_two = 36 | |
281 }; | |
282 #endif // !PRODUCT | |
283 | |
284 // This is a pointer to a section of profiling data. | |
285 DataLayout* _data; | |
286 | |
287 protected: | |
288 DataLayout* data() { return _data; } | |
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289 const DataLayout* data() const { return _data; } |
0 | 290 |
291 enum { | |
292 cell_size = DataLayout::cell_size | |
293 }; | |
294 | |
295 public: | |
296 // How many cells are in this? | |
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297 virtual int cell_count() const { |
0 | 298 ShouldNotReachHere(); |
299 return -1; | |
300 } | |
301 | |
302 // Return the size of this data. | |
303 int size_in_bytes() { | |
304 return DataLayout::compute_size_in_bytes(cell_count()); | |
305 } | |
306 | |
307 protected: | |
308 // Low-level accessors for underlying data | |
309 void set_intptr_at(int index, intptr_t value) { | |
310 assert(0 <= index && index < cell_count(), "oob"); | |
311 data()->set_cell_at(index, value); | |
312 } | |
313 void release_set_intptr_at(int index, intptr_t value) { | |
314 assert(0 <= index && index < cell_count(), "oob"); | |
315 data()->release_set_cell_at(index, value); | |
316 } | |
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317 intptr_t intptr_at(int index) const { |
0 | 318 assert(0 <= index && index < cell_count(), "oob"); |
319 return data()->cell_at(index); | |
320 } | |
321 void set_uint_at(int index, uint value) { | |
322 set_intptr_at(index, (intptr_t) value); | |
323 } | |
324 void release_set_uint_at(int index, uint value) { | |
325 release_set_intptr_at(index, (intptr_t) value); | |
326 } | |
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327 uint uint_at(int index) const { |
0 | 328 return (uint)intptr_at(index); |
329 } | |
330 void set_int_at(int index, int value) { | |
331 set_intptr_at(index, (intptr_t) value); | |
332 } | |
333 void release_set_int_at(int index, int value) { | |
334 release_set_intptr_at(index, (intptr_t) value); | |
335 } | |
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336 int int_at(int index) const { |
0 | 337 return (int)intptr_at(index); |
338 } | |
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339 int int_at_unchecked(int index) const { |
0 | 340 return (int)data()->cell_at(index); |
341 } | |
342 void set_oop_at(int index, oop value) { | |
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343 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 344 } |
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345 oop oop_at(int index) const { |
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346 return cast_to_oop(intptr_at(index)); |
0 | 347 } |
348 | |
349 void set_flag_at(int flag_number) { | |
350 data()->set_flag_at(flag_number); | |
351 } | |
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352 bool flag_at(int flag_number) const { |
0 | 353 return data()->flag_at(flag_number); |
354 } | |
355 | |
356 // two convenient imports for use by subclasses: | |
357 static ByteSize cell_offset(int index) { | |
358 return DataLayout::cell_offset(index); | |
359 } | |
360 static int flag_number_to_byte_constant(int flag_number) { | |
361 return DataLayout::flag_number_to_byte_constant(flag_number); | |
362 } | |
363 | |
364 ProfileData(DataLayout* data) { | |
365 _data = data; | |
366 } | |
367 | |
368 public: | |
369 // Constructor for invalid ProfileData. | |
370 ProfileData(); | |
371 | |
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372 u2 bci() const { |
0 | 373 return data()->bci(); |
374 } | |
375 | |
376 address dp() { | |
377 return (address)_data; | |
378 } | |
379 | |
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380 int trap_state() const { |
0 | 381 return data()->trap_state(); |
382 } | |
383 void set_trap_state(int new_state) { | |
384 data()->set_trap_state(new_state); | |
385 } | |
386 | |
387 // Type checking | |
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388 virtual bool is_BitData() const { return false; } |
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389 virtual bool is_CounterData() const { return false; } |
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390 virtual bool is_JumpData() const { return false; } |
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391 virtual bool is_ReceiverTypeData()const { return false; } |
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392 virtual bool is_VirtualCallData() const { return false; } |
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393 virtual bool is_RetData() const { return false; } |
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394 virtual bool is_BranchData() const { return false; } |
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395 virtual bool is_ArrayData() const { return false; } |
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396 virtual bool is_MultiBranchData() const { return false; } |
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397 virtual bool is_ArgInfoData() const { return false; } |
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398 virtual bool is_CallTypeData() const { return false; } |
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399 virtual bool is_VirtualCallTypeData()const { return false; } |
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400 |
0 | 401 |
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402 BitData* as_BitData() const { |
0 | 403 assert(is_BitData(), "wrong type"); |
404 return is_BitData() ? (BitData*) this : NULL; | |
405 } | |
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406 CounterData* as_CounterData() const { |
0 | 407 assert(is_CounterData(), "wrong type"); |
408 return is_CounterData() ? (CounterData*) this : NULL; | |
409 } | |
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410 JumpData* as_JumpData() const { |
0 | 411 assert(is_JumpData(), "wrong type"); |
412 return is_JumpData() ? (JumpData*) this : NULL; | |
413 } | |
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414 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 415 assert(is_ReceiverTypeData(), "wrong type"); |
416 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
417 } | |
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418 VirtualCallData* as_VirtualCallData() const { |
0 | 419 assert(is_VirtualCallData(), "wrong type"); |
420 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
421 } | |
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422 RetData* as_RetData() const { |
0 | 423 assert(is_RetData(), "wrong type"); |
424 return is_RetData() ? (RetData*) this : NULL; | |
425 } | |
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426 BranchData* as_BranchData() const { |
0 | 427 assert(is_BranchData(), "wrong type"); |
428 return is_BranchData() ? (BranchData*) this : NULL; | |
429 } | |
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430 ArrayData* as_ArrayData() const { |
0 | 431 assert(is_ArrayData(), "wrong type"); |
432 return is_ArrayData() ? (ArrayData*) this : NULL; | |
433 } | |
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434 MultiBranchData* as_MultiBranchData() const { |
0 | 435 assert(is_MultiBranchData(), "wrong type"); |
436 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
437 } | |
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438 ArgInfoData* as_ArgInfoData() const { |
45
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439 assert(is_ArgInfoData(), "wrong type"); |
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440 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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441 } |
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442 CallTypeData* as_CallTypeData() const { |
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443 assert(is_CallTypeData(), "wrong type"); |
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444 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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445 } |
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446 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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447 assert(is_VirtualCallTypeData(), "wrong type"); |
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448 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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449 } |
0 | 450 |
451 | |
452 // Subclass specific initialization | |
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453 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 454 |
455 // GC support | |
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456 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 457 |
458 // CI translation: ProfileData can represent both MethodDataOop data | |
459 // as well as CIMethodData data. This function is provided for translating | |
460 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
461 // most ProfileData don't require any translation, so we provide the null | |
462 // translation here, and the required translators are in the ci subclasses. | |
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463 virtual void translate_from(const ProfileData* data) {} |
0 | 464 |
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465 virtual void print_data_on(outputStream* st) const { |
0 | 466 ShouldNotReachHere(); |
467 } | |
468 | |
469 #ifndef PRODUCT | |
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470 void print_shared(outputStream* st, const char* name) const; |
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471 void tab(outputStream* st, bool first = false) const; |
0 | 472 #endif |
473 }; | |
474 | |
475 // BitData | |
476 // | |
477 // A BitData holds a flag or two in its header. | |
478 class BitData : public ProfileData { | |
479 protected: | |
480 enum { | |
481 // null_seen: | |
482 // saw a null operand (cast/aastore/instanceof) | |
483 null_seen_flag = DataLayout::first_flag + 0 | |
484 }; | |
485 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
486 public: | |
487 BitData(DataLayout* layout) : ProfileData(layout) { | |
488 } | |
489 | |
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490 virtual bool is_BitData() const { return true; } |
0 | 491 |
492 static int static_cell_count() { | |
493 return bit_cell_count; | |
494 } | |
495 | |
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496 virtual int cell_count() const { |
0 | 497 return static_cell_count(); |
498 } | |
499 | |
500 // Accessor | |
501 | |
502 // The null_seen flag bit is specially known to the interpreter. | |
503 // Consulting it allows the compiler to avoid setting up null_check traps. | |
504 bool null_seen() { return flag_at(null_seen_flag); } | |
505 void set_null_seen() { set_flag_at(null_seen_flag); } | |
506 | |
507 | |
508 // Code generation support | |
509 static int null_seen_byte_constant() { | |
510 return flag_number_to_byte_constant(null_seen_flag); | |
511 } | |
512 | |
513 static ByteSize bit_data_size() { | |
514 return cell_offset(bit_cell_count); | |
515 } | |
516 | |
517 #ifndef PRODUCT | |
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518 void print_data_on(outputStream* st) const; |
0 | 519 #endif |
520 }; | |
521 | |
522 // CounterData | |
523 // | |
524 // A CounterData corresponds to a simple counter. | |
525 class CounterData : public BitData { | |
526 protected: | |
527 enum { | |
528 count_off, | |
529 counter_cell_count | |
530 }; | |
531 public: | |
532 CounterData(DataLayout* layout) : BitData(layout) {} | |
533 | |
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534 virtual bool is_CounterData() const { return true; } |
0 | 535 |
536 static int static_cell_count() { | |
537 return counter_cell_count; | |
538 } | |
539 | |
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540 virtual int cell_count() const { |
0 | 541 return static_cell_count(); |
542 } | |
543 | |
544 // Direct accessor | |
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545 uint count() const { |
0 | 546 return uint_at(count_off); |
547 } | |
548 | |
549 // Code generation support | |
550 static ByteSize count_offset() { | |
551 return cell_offset(count_off); | |
552 } | |
553 static ByteSize counter_data_size() { | |
554 return cell_offset(counter_cell_count); | |
555 } | |
556 | |
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557 void set_count(uint count) { |
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558 set_uint_at(count_off, count); |
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559 } |
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560 |
0 | 561 #ifndef PRODUCT |
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562 void print_data_on(outputStream* st) const; |
0 | 563 #endif |
564 }; | |
565 | |
566 // JumpData | |
567 // | |
568 // A JumpData is used to access profiling information for a direct | |
569 // branch. It is a counter, used for counting the number of branches, | |
570 // plus a data displacement, used for realigning the data pointer to | |
571 // the corresponding target bci. | |
572 class JumpData : public ProfileData { | |
573 protected: | |
574 enum { | |
575 taken_off_set, | |
576 displacement_off_set, | |
577 jump_cell_count | |
578 }; | |
579 | |
580 void set_displacement(int displacement) { | |
581 set_int_at(displacement_off_set, displacement); | |
582 } | |
583 | |
584 public: | |
585 JumpData(DataLayout* layout) : ProfileData(layout) { | |
586 assert(layout->tag() == DataLayout::jump_data_tag || | |
587 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
588 } | |
589 | |
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590 virtual bool is_JumpData() const { return true; } |
0 | 591 |
592 static int static_cell_count() { | |
593 return jump_cell_count; | |
594 } | |
595 | |
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596 virtual int cell_count() const { |
0 | 597 return static_cell_count(); |
598 } | |
599 | |
600 // Direct accessor | |
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601 uint taken() const { |
0 | 602 return uint_at(taken_off_set); |
603 } | |
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604 |
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605 void set_taken(uint cnt) { |
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606 set_uint_at(taken_off_set, cnt); |
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607 } |
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608 |
0 | 609 // Saturating counter |
610 uint inc_taken() { | |
611 uint cnt = taken() + 1; | |
612 // Did we wrap? Will compiler screw us?? | |
613 if (cnt == 0) cnt--; | |
614 set_uint_at(taken_off_set, cnt); | |
615 return cnt; | |
616 } | |
617 | |
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618 int displacement() const { |
0 | 619 return int_at(displacement_off_set); |
620 } | |
621 | |
622 // Code generation support | |
623 static ByteSize taken_offset() { | |
624 return cell_offset(taken_off_set); | |
625 } | |
626 | |
627 static ByteSize displacement_offset() { | |
628 return cell_offset(displacement_off_set); | |
629 } | |
630 | |
631 // Specific initialization. | |
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632 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 633 |
634 #ifndef PRODUCT | |
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635 void print_data_on(outputStream* st) const; |
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636 #endif |
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637 }; |
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638 |
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639 // Entries in a ProfileData object to record types: it can either be |
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640 // none (no profile), unknown (conflicting profile data) or a klass if |
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641 // a single one is seen. Whether a null reference was seen is also |
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642 // recorded. No counter is associated with the type and a single type |
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643 // is tracked (unlike VirtualCallData). |
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644 class TypeEntries { |
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645 |
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646 public: |
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647 |
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648 // A single cell is used to record information for a type: |
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649 // - the cell is initialized to 0 |
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650 // - when a type is discovered it is stored in the cell |
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651 // - bit zero of the cell is used to record whether a null reference |
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652 // was encountered or not |
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653 // - bit 1 is set to record a conflict in the type information |
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654 |
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655 enum { |
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656 null_seen = 1, |
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657 type_mask = ~null_seen, |
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658 type_unknown = 2, |
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659 status_bits = null_seen | type_unknown, |
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660 type_klass_mask = ~status_bits |
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661 }; |
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662 |
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663 // what to initialize a cell to |
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664 static intptr_t type_none() { |
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665 return 0; |
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666 } |
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667 |
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668 // null seen = bit 0 set? |
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669 static bool was_null_seen(intptr_t v) { |
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670 return (v & null_seen) != 0; |
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671 } |
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672 |
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673 // conflicting type information = bit 1 set? |
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674 static bool is_type_unknown(intptr_t v) { |
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675 return (v & type_unknown) != 0; |
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676 } |
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677 |
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678 // not type information yet = all bits cleared, ignoring bit 0? |
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679 static bool is_type_none(intptr_t v) { |
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680 return (v & type_mask) == 0; |
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681 } |
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682 |
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683 // recorded type: cell without bit 0 and 1 |
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684 static intptr_t klass_part(intptr_t v) { |
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685 intptr_t r = v & type_klass_mask; |
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686 assert (r != 0, "invalid"); |
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687 return r; |
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688 } |
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689 |
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690 // type recorded |
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691 static Klass* valid_klass(intptr_t k) { |
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692 if (!is_type_none(k) && |
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693 !is_type_unknown(k)) { |
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694 return (Klass*)klass_part(k); |
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695 } else { |
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696 return NULL; |
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|
697 } |
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|
698 } |
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|
699 |
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700 static intptr_t with_status(intptr_t k, intptr_t in) { |
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701 return k | (in & status_bits); |
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|
702 } |
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|
703 |
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|
704 static intptr_t with_status(Klass* k, intptr_t in) { |
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|
705 return with_status((intptr_t)k, in); |
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|
706 } |
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|
707 |
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|
708 #ifndef PRODUCT |
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709 static void print_klass(outputStream* st, intptr_t k); |
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710 #endif |
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|
711 |
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|
712 // GC support |
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713 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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|
714 |
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|
715 protected: |
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716 // ProfileData object these entries are part of |
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717 ProfileData* _pd; |
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718 // offset within the ProfileData object where the entries start |
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|
719 const int _base_off; |
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|
720 |
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|
721 TypeEntries(int base_off) |
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722 : _base_off(base_off), _pd(NULL) {} |
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|
723 |
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724 void set_intptr_at(int index, intptr_t value) { |
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725 _pd->set_intptr_at(index, value); |
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|
726 } |
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|
727 |
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|
728 intptr_t intptr_at(int index) const { |
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|
729 return _pd->intptr_at(index); |
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|
730 } |
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|
731 |
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|
732 public: |
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|
733 void set_profile_data(ProfileData* pd) { |
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|
734 _pd = pd; |
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|
735 } |
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|
736 }; |
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|
737 |
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|
738 // Type entries used for arguments passed at a call and parameters on |
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|
739 // method entry. 2 cells per entry: one for the type encoded as in |
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|
740 // TypeEntries and one initialized with the stack slot where the |
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|
741 // profiled object is to be found so that the interpreter can locate |
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|
742 // it quickly. |
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|
743 class TypeStackSlotEntries : public TypeEntries { |
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|
744 |
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|
745 private: |
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|
746 enum { |
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|
747 stack_slot_entry, |
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|
748 type_entry, |
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|
749 per_arg_cell_count |
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|
750 }; |
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|
751 |
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|
752 // offset of cell for stack slot for entry i within ProfileData object |
12882
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|
753 int stack_slot_offset(int i) const { |
12875
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754 return _base_off + stack_slot_local_offset(i); |
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|
755 } |
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|
756 |
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|
757 protected: |
12882
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|
758 const int _number_of_entries; |
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|
759 |
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|
760 // offset of cell for type for entry i within ProfileData object |
12882
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|
761 int type_offset(int i) const { |
12875
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|
762 return _base_off + type_local_offset(i); |
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|
763 } |
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|
764 |
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|
765 public: |
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|
766 |
12882
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|
767 TypeStackSlotEntries(int base_off, int nb_entries) |
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768 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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|
769 |
12882
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|
770 static int compute_cell_count(Symbol* signature, int max); |
12875
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|
771 |
12882
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|
772 void post_initialize(Symbol* signature, bool has_receiver); |
12875
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|
773 |
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|
774 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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|
775 static int stack_slot_local_offset(int i) { |
12882
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|
776 return i * per_arg_cell_count + stack_slot_entry; |
12875
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|
777 } |
d13d7aba8c12
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diff
changeset
|
778 |
d13d7aba8c12
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|
779 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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|
780 static int type_local_offset(int i) { |
12882
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|
781 return i * per_arg_cell_count + type_entry; |
12875
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|
782 } |
d13d7aba8c12
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diff
changeset
|
783 |
d13d7aba8c12
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parents:
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diff
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|
784 // stack slot for entry i |
d13d7aba8c12
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|
785 uint stack_slot(int i) const { |
12882
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|
786 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
787 return _pd->uint_at(stack_slot_offset(i)); |
12875
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|
788 } |
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|
789 |
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|
790 // set stack slot for entry i |
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|
791 void set_stack_slot(int i, uint num) { |
12882
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|
792 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
793 _pd->set_uint_at(stack_slot_offset(i), num); |
12875
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|
794 } |
d13d7aba8c12
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|
795 |
d13d7aba8c12
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|
796 // type for entry i |
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|
797 intptr_t type(int i) const { |
12882
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|
798 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
799 return _pd->intptr_at(type_offset(i)); |
12875
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|
800 } |
d13d7aba8c12
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diff
changeset
|
801 |
d13d7aba8c12
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parents:
12316
diff
changeset
|
802 // set type for entry i |
d13d7aba8c12
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parents:
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diff
changeset
|
803 void set_type(int i, intptr_t k) { |
12882
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|
804 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
805 _pd->set_intptr_at(type_offset(i), k); |
12875
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|
806 } |
d13d7aba8c12
8023657: New type profiling points: arguments to call
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diff
changeset
|
807 |
d13d7aba8c12
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parents:
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diff
changeset
|
808 static ByteSize per_arg_size() { |
d13d7aba8c12
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|
809 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
d13d7aba8c12
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|
810 } |
d13d7aba8c12
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diff
changeset
|
811 |
d13d7aba8c12
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diff
changeset
|
812 static int per_arg_count() { |
d13d7aba8c12
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parents:
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diff
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|
813 return per_arg_cell_count ; |
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diff
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|
814 } |
d13d7aba8c12
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|
815 |
12882
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changeset
|
816 // GC support |
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|
817 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
ce0cc25bc5e2
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|
818 |
ce0cc25bc5e2
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|
819 #ifndef PRODUCT |
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|
820 void print_data_on(outputStream* st) const; |
ce0cc25bc5e2
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|
821 #endif |
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|
822 }; |
ce0cc25bc5e2
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|
823 |
ce0cc25bc5e2
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|
824 // Type entry used for return from a call. A single cell to record the |
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|
825 // type. |
ce0cc25bc5e2
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|
826 class ReturnTypeEntry : public TypeEntries { |
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|
827 |
ce0cc25bc5e2
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|
828 private: |
ce0cc25bc5e2
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|
829 enum { |
ce0cc25bc5e2
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|
830 cell_count = 1 |
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831 }; |
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832 |
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833 public: |
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834 ReturnTypeEntry(int base_off) |
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835 : TypeEntries(base_off) {} |
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836 |
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837 void post_initialize() { |
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838 set_type(type_none()); |
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839 } |
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840 |
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841 intptr_t type() const { |
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842 return _pd->intptr_at(_base_off); |
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843 } |
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844 |
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845 void set_type(intptr_t k) { |
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846 _pd->set_intptr_at(_base_off, k); |
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847 } |
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848 |
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849 static int static_cell_count() { |
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850 return cell_count; |
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851 } |
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852 |
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853 static ByteSize size() { |
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854 return in_ByteSize(cell_count * DataLayout::cell_size); |
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855 } |
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856 |
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857 ByteSize type_offset() { |
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858 return DataLayout::cell_offset(_base_off); |
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859 } |
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860 |
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861 // GC support |
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862 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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863 |
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864 #ifndef PRODUCT |
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865 void print_data_on(outputStream* st) const; |
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866 #endif |
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867 }; |
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868 |
12882
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869 // Entries to collect type information at a call: contains arguments |
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870 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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871 // number of cells. Because the number of cells for the return type is |
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872 // smaller than the number of cells for the type of an arguments, the |
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873 // number of cells is used to tell how many arguments are profiled and |
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874 // whether a return value is profiled. See has_arguments() and |
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875 // has_return(). |
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876 class TypeEntriesAtCall { |
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877 private: |
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878 static int stack_slot_local_offset(int i) { |
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879 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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880 } |
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881 |
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882 static int argument_type_local_offset(int i) { |
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883 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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884 } |
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885 |
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886 public: |
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887 |
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888 static int header_cell_count() { |
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889 return 1; |
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890 } |
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891 |
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892 static int cell_count_local_offset() { |
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893 return 0; |
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894 } |
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895 |
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896 static int compute_cell_count(BytecodeStream* stream); |
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897 |
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898 static void initialize(DataLayout* dl, int base, int cell_count) { |
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899 int off = base + cell_count_local_offset(); |
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900 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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901 } |
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902 |
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903 static bool arguments_profiling_enabled(); |
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904 static bool return_profiling_enabled(); |
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905 |
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906 // Code generation support |
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907 static ByteSize cell_count_offset() { |
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908 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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909 } |
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910 |
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911 static ByteSize args_data_offset() { |
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912 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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913 } |
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914 |
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915 static ByteSize stack_slot_offset(int i) { |
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916 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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917 } |
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918 |
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919 static ByteSize argument_type_offset(int i) { |
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920 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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921 } |
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922 }; |
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923 |
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924 // CallTypeData |
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925 // |
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926 // A CallTypeData is used to access profiling information about a non |
12882
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927 // virtual call for which we collect type information about arguments |
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928 // and return value. |
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929 class CallTypeData : public CounterData { |
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930 private: |
12882
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931 // entries for arguments if any |
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932 TypeStackSlotEntries _args; |
12882
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933 // entry for return type if any |
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934 ReturnTypeEntry _ret; |
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|
935 |
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936 int cell_count_global_offset() const { |
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937 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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938 } |
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|
939 |
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940 // number of cells not counting the header |
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941 int cell_count_no_header() const { |
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942 return uint_at(cell_count_global_offset()); |
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943 } |
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944 |
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945 void check_number_of_arguments(int total) { |
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946 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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947 } |
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|
948 |
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949 protected: |
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950 // An entry for a return value takes less space than an entry for an |
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951 // argument so if the number of cells exceeds the number of cells |
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952 // needed for an argument, this object contains type information for |
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953 // at least one argument. |
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954 bool has_arguments() const { |
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955 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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956 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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957 return res; |
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958 } |
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959 |
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960 public: |
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961 CallTypeData(DataLayout* layout) : |
12882
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962 CounterData(layout), |
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963 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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964 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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965 { |
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966 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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967 // Some compilers (VC++) don't want this passed in member initialization list |
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968 _args.set_profile_data(this); |
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969 _ret.set_profile_data(this); |
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970 } |
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971 |
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972 const TypeStackSlotEntries* args() const { |
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973 assert(has_arguments(), "no profiling of arguments"); |
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974 return &_args; |
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975 } |
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976 |
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977 const ReturnTypeEntry* ret() const { |
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978 assert(has_return(), "no profiling of return value"); |
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979 return &_ret; |
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980 } |
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981 |
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982 virtual bool is_CallTypeData() const { return true; } |
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983 |
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984 static int static_cell_count() { |
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985 return -1; |
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986 } |
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987 |
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988 static int compute_cell_count(BytecodeStream* stream) { |
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989 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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990 } |
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991 |
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992 static void initialize(DataLayout* dl, int cell_count) { |
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993 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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994 } |
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995 |
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996 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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997 |
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998 virtual int cell_count() const { |
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999 return CounterData::static_cell_count() + |
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1000 TypeEntriesAtCall::header_cell_count() + |
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1001 int_at_unchecked(cell_count_global_offset()); |
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1002 } |
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1003 |
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1004 int number_of_arguments() const { |
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1005 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1006 } |
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1007 |
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1008 void set_argument_type(int i, Klass* k) { |
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1009 assert(has_arguments(), "no arguments!"); |
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1010 intptr_t current = _args.type(i); |
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1011 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1012 } |
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1013 |
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1014 void set_return_type(Klass* k) { |
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1015 assert(has_return(), "no return!"); |
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1016 intptr_t current = _ret.type(); |
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1017 _ret.set_type(TypeEntries::with_status(k, current)); |
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1018 } |
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1019 |
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1020 // An entry for a return value takes less space than an entry for an |
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1021 // argument, so if the remainder of the number of cells divided by |
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1022 // the number of cells for an argument is not null, a return value |
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1023 // is profiled in this object. |
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1024 bool has_return() const { |
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1025 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1026 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1027 return res; |
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1028 } |
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1029 |
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1030 // Code generation support |
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1031 static ByteSize args_data_offset() { |
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1032 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1033 } |
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1034 |
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1035 // GC support |
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1036 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1037 if (has_arguments()) { |
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1038 _args.clean_weak_klass_links(is_alive_closure); |
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1039 } |
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1040 if (has_return()) { |
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1041 _ret.clean_weak_klass_links(is_alive_closure); |
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1042 } |
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1043 } |
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1044 |
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1045 #ifndef PRODUCT |
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1046 virtual void print_data_on(outputStream* st) const; |
0 | 1047 #endif |
1048 }; | |
1049 | |
1050 // ReceiverTypeData | |
1051 // | |
1052 // A ReceiverTypeData is used to access profiling information about a | |
1053 // dynamic type check. It consists of a counter which counts the total times | |
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1054 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1055 // which are used to store a type profile for the receiver of the check. |
1056 class ReceiverTypeData : public CounterData { | |
1057 protected: | |
1058 enum { | |
1059 receiver0_offset = counter_cell_count, | |
1060 count0_offset, | |
1061 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1062 }; | |
1063 | |
1064 public: | |
1065 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1066 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1067 layout->tag() == DataLayout::virtual_call_data_tag || |
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1068 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1069 } |
1070 | |
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1071 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1072 |
1073 static int static_cell_count() { | |
1074 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
1075 } | |
1076 | |
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1077 virtual int cell_count() const { |
0 | 1078 return static_cell_count(); |
1079 } | |
1080 | |
1081 // Direct accessors | |
1082 static uint row_limit() { | |
1083 return TypeProfileWidth; | |
1084 } | |
1085 static int receiver_cell_index(uint row) { | |
1086 return receiver0_offset + row * receiver_type_row_cell_count; | |
1087 } | |
1088 static int receiver_count_cell_index(uint row) { | |
1089 return count0_offset + row * receiver_type_row_cell_count; | |
1090 } | |
1091 | |
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1092 Klass* receiver(uint row) const { |
0 | 1093 assert(row < row_limit(), "oob"); |
1094 | |
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1095 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1096 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1097 return recv; |
1098 } | |
1099 | |
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1100 void set_receiver(uint row, Klass* k) { |
941 | 1101 assert((uint)row < row_limit(), "oob"); |
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1102 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1103 } |
1104 | |
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1105 uint receiver_count(uint row) const { |
0 | 1106 assert(row < row_limit(), "oob"); |
1107 return uint_at(receiver_count_cell_index(row)); | |
1108 } | |
1109 | |
941 | 1110 void set_receiver_count(uint row, uint count) { |
1111 assert(row < row_limit(), "oob"); | |
1112 set_uint_at(receiver_count_cell_index(row), count); | |
1113 } | |
1114 | |
1115 void clear_row(uint row) { | |
1116 assert(row < row_limit(), "oob"); | |
1251
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1117 // Clear total count - indicator of polymorphic call site. |
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1118 // The site may look like as monomorphic after that but |
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1119 // it allow to have more accurate profiling information because |
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1120 // there was execution phase change since klasses were unloaded. |
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1121 // If the site is still polymorphic then MDO will be updated |
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1122 // to reflect it. But it could be the case that the site becomes |
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1123 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1124 // Even if we use monomorphic (when it is not) for compilation |
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1125 // we will only have trap, deoptimization and recompile again |
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1126 // with updated MDO after executing method in Interpreter. |
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1127 // An additional receiver will be recorded in the cleaned row |
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1128 // during next call execution. |
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1129 // |
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1130 // Note: our profiling logic works with empty rows in any slot. |
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1131 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1132 // |
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1133 set_count(0); |
941 | 1134 set_receiver(row, NULL); |
1135 set_receiver_count(row, 0); | |
1136 } | |
1137 | |
0 | 1138 // Code generation support |
1139 static ByteSize receiver_offset(uint row) { | |
1140 return cell_offset(receiver_cell_index(row)); | |
1141 } | |
1142 static ByteSize receiver_count_offset(uint row) { | |
1143 return cell_offset(receiver_count_cell_index(row)); | |
1144 } | |
1145 static ByteSize receiver_type_data_size() { | |
1146 return cell_offset(static_cell_count()); | |
1147 } | |
1148 | |
1149 // GC support | |
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1150 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1151 |
1152 #ifndef PRODUCT | |
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1153 void print_receiver_data_on(outputStream* st) const; |
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1154 void print_data_on(outputStream* st) const; |
0 | 1155 #endif |
1156 }; | |
1157 | |
1158 // VirtualCallData | |
1159 // | |
1160 // A VirtualCallData is used to access profiling information about a | |
1161 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1162 class VirtualCallData : public ReceiverTypeData { | |
1163 public: | |
1164 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1165 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1166 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1167 } |
1168 | |
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1169 virtual bool is_VirtualCallData() const { return true; } |
0 | 1170 |
1171 static int static_cell_count() { | |
1172 // At this point we could add more profile state, e.g., for arguments. | |
1173 // But for now it's the same size as the base record type. | |
1174 return ReceiverTypeData::static_cell_count(); | |
1175 } | |
1176 | |
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1177 virtual int cell_count() const { |
0 | 1178 return static_cell_count(); |
1179 } | |
1180 | |
1181 // Direct accessors | |
1182 static ByteSize virtual_call_data_size() { | |
1183 return cell_offset(static_cell_count()); | |
1184 } | |
1185 | |
1186 #ifndef PRODUCT | |
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1187 void print_data_on(outputStream* st) const; |
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1188 #endif |
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1189 }; |
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1190 |
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1191 // VirtualCallTypeData |
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1192 // |
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1193 // A VirtualCallTypeData is used to access profiling information about |
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1194 // a virtual call for which we collect type information about |
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1195 // arguments and return value. |
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1196 class VirtualCallTypeData : public VirtualCallData { |
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1197 private: |
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1198 // entries for arguments if any |
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1199 TypeStackSlotEntries _args; |
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1200 // entry for return type if any |
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1201 ReturnTypeEntry _ret; |
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1202 |
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1203 int cell_count_global_offset() const { |
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1204 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1205 } |
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1206 |
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1207 // number of cells not counting the header |
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1208 int cell_count_no_header() const { |
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1209 return uint_at(cell_count_global_offset()); |
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1210 } |
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1211 |
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1212 void check_number_of_arguments(int total) { |
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1213 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1214 } |
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1215 |
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1216 protected: |
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1217 // An entry for a return value takes less space than an entry for an |
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1218 // argument so if the number of cells exceeds the number of cells |
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1219 // needed for an argument, this object contains type information for |
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1220 // at least one argument. |
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1221 bool has_arguments() const { |
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1222 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1223 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1224 return res; |
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1225 } |
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1226 |
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1227 public: |
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1228 VirtualCallTypeData(DataLayout* layout) : |
12882
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1229 VirtualCallData(layout), |
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1230 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1231 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1232 { |
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1233 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1234 // Some compilers (VC++) don't want this passed in member initialization list |
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1235 _args.set_profile_data(this); |
12882
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1236 _ret.set_profile_data(this); |
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1237 } |
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1238 |
12882
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1239 const TypeStackSlotEntries* args() const { |
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1240 assert(has_arguments(), "no profiling of arguments"); |
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1241 return &_args; |
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1242 } |
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1243 |
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1244 const ReturnTypeEntry* ret() const { |
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1245 assert(has_return(), "no profiling of return value"); |
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1246 return &_ret; |
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1247 } |
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1248 |
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1249 virtual bool is_VirtualCallTypeData() const { return true; } |
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1250 |
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1251 static int static_cell_count() { |
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1252 return -1; |
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1253 } |
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1254 |
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1255 static int compute_cell_count(BytecodeStream* stream) { |
12882
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1256 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1257 } |
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1258 |
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1259 static void initialize(DataLayout* dl, int cell_count) { |
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1260 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1261 } |
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1262 |
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1263 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1264 |
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1265 virtual int cell_count() const { |
12882
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1266 return VirtualCallData::static_cell_count() + |
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1267 TypeEntriesAtCall::header_cell_count() + |
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1268 int_at_unchecked(cell_count_global_offset()); |
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1269 } |
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1270 |
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1271 int number_of_arguments() const { |
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1272 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1273 } |
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1274 |
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1275 void set_argument_type(int i, Klass* k) { |
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1276 assert(has_arguments(), "no arguments!"); |
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1277 intptr_t current = _args.type(i); |
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1278 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1279 } |
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1280 |
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1281 void set_return_type(Klass* k) { |
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1282 assert(has_return(), "no return!"); |
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1283 intptr_t current = _ret.type(); |
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1284 _ret.set_type(TypeEntries::with_status(k, current)); |
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1285 } |
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1286 |
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1287 // An entry for a return value takes less space than an entry for an |
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1288 // argument, so if the remainder of the number of cells divided by |
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1289 // the number of cells for an argument is not null, a return value |
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1290 // is profiled in this object. |
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1291 bool has_return() const { |
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1292 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1293 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1294 return res; |
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1295 } |
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1296 |
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1297 // Code generation support |
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1298 static ByteSize args_data_offset() { |
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1299 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1300 } |
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1301 |
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1302 // GC support |
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1303 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1304 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1305 if (has_arguments()) { |
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1306 _args.clean_weak_klass_links(is_alive_closure); |
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1307 } |
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1308 if (has_return()) { |
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1309 _ret.clean_weak_klass_links(is_alive_closure); |
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1310 } |
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1311 } |
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1312 |
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1313 #ifndef PRODUCT |
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1314 virtual void print_data_on(outputStream* st) const; |
0 | 1315 #endif |
1316 }; | |
1317 | |
1318 // RetData | |
1319 // | |
1320 // A RetData is used to access profiling information for a ret bytecode. | |
1321 // It is composed of a count of the number of times that the ret has | |
1322 // been executed, followed by a series of triples of the form | |
1323 // (bci, count, di) which count the number of times that some bci was the | |
1324 // target of the ret and cache a corresponding data displacement. | |
1325 class RetData : public CounterData { | |
1326 protected: | |
1327 enum { | |
1328 bci0_offset = counter_cell_count, | |
1329 count0_offset, | |
1330 displacement0_offset, | |
1331 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1332 }; | |
1333 | |
1334 void set_bci(uint row, int bci) { | |
1335 assert((uint)row < row_limit(), "oob"); | |
1336 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1337 } | |
1338 void release_set_bci(uint row, int bci) { | |
1339 assert((uint)row < row_limit(), "oob"); | |
1340 // 'release' when setting the bci acts as a valid flag for other | |
1341 // threads wrt bci_count and bci_displacement. | |
1342 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1343 } | |
1344 void set_bci_count(uint row, uint count) { | |
1345 assert((uint)row < row_limit(), "oob"); | |
1346 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1347 } | |
1348 void set_bci_displacement(uint row, int disp) { | |
1349 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1350 } | |
1351 | |
1352 public: | |
1353 RetData(DataLayout* layout) : CounterData(layout) { | |
1354 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1355 } | |
1356 | |
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1357 virtual bool is_RetData() const { return true; } |
0 | 1358 |
1359 enum { | |
1360 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1361 }; | |
1362 | |
1363 static int static_cell_count() { | |
1364 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1365 } | |
1366 | |
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1367 virtual int cell_count() const { |
0 | 1368 return static_cell_count(); |
1369 } | |
1370 | |
1371 static uint row_limit() { | |
1372 return BciProfileWidth; | |
1373 } | |
1374 static int bci_cell_index(uint row) { | |
1375 return bci0_offset + row * ret_row_cell_count; | |
1376 } | |
1377 static int bci_count_cell_index(uint row) { | |
1378 return count0_offset + row * ret_row_cell_count; | |
1379 } | |
1380 static int bci_displacement_cell_index(uint row) { | |
1381 return displacement0_offset + row * ret_row_cell_count; | |
1382 } | |
1383 | |
1384 // Direct accessors | |
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1385 int bci(uint row) const { |
0 | 1386 return int_at(bci_cell_index(row)); |
1387 } | |
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1388 uint bci_count(uint row) const { |
0 | 1389 return uint_at(bci_count_cell_index(row)); |
1390 } | |
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1391 int bci_displacement(uint row) const { |
0 | 1392 return int_at(bci_displacement_cell_index(row)); |
1393 } | |
1394 | |
1395 // Interpreter Runtime support | |
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1396 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1397 |
1398 // Code generation support | |
1399 static ByteSize bci_offset(uint row) { | |
1400 return cell_offset(bci_cell_index(row)); | |
1401 } | |
1402 static ByteSize bci_count_offset(uint row) { | |
1403 return cell_offset(bci_count_cell_index(row)); | |
1404 } | |
1405 static ByteSize bci_displacement_offset(uint row) { | |
1406 return cell_offset(bci_displacement_cell_index(row)); | |
1407 } | |
1408 | |
1409 // Specific initialization. | |
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1410 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1411 |
1412 #ifndef PRODUCT | |
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1413 void print_data_on(outputStream* st) const; |
0 | 1414 #endif |
1415 }; | |
1416 | |
1417 // BranchData | |
1418 // | |
1419 // A BranchData is used to access profiling data for a two-way branch. | |
1420 // It consists of taken and not_taken counts as well as a data displacement | |
1421 // for the taken case. | |
1422 class BranchData : public JumpData { | |
1423 protected: | |
1424 enum { | |
1425 not_taken_off_set = jump_cell_count, | |
1426 branch_cell_count | |
1427 }; | |
1428 | |
1429 void set_displacement(int displacement) { | |
1430 set_int_at(displacement_off_set, displacement); | |
1431 } | |
1432 | |
1433 public: | |
1434 BranchData(DataLayout* layout) : JumpData(layout) { | |
1435 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1436 } | |
1437 | |
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1438 virtual bool is_BranchData() const { return true; } |
0 | 1439 |
1440 static int static_cell_count() { | |
1441 return branch_cell_count; | |
1442 } | |
1443 | |
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1444 virtual int cell_count() const { |
0 | 1445 return static_cell_count(); |
1446 } | |
1447 | |
1448 // Direct accessor | |
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1449 uint not_taken() const { |
0 | 1450 return uint_at(not_taken_off_set); |
1451 } | |
1452 | |
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1453 void set_not_taken(uint cnt) { |
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1454 set_uint_at(not_taken_off_set, cnt); |
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1455 } |
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1456 |
0 | 1457 uint inc_not_taken() { |
1458 uint cnt = not_taken() + 1; | |
1459 // Did we wrap? Will compiler screw us?? | |
1460 if (cnt == 0) cnt--; | |
1461 set_uint_at(not_taken_off_set, cnt); | |
1462 return cnt; | |
1463 } | |
1464 | |
1465 // Code generation support | |
1466 static ByteSize not_taken_offset() { | |
1467 return cell_offset(not_taken_off_set); | |
1468 } | |
1469 static ByteSize branch_data_size() { | |
1470 return cell_offset(branch_cell_count); | |
1471 } | |
1472 | |
1473 // Specific initialization. | |
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1474 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1475 |
1476 #ifndef PRODUCT | |
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1477 void print_data_on(outputStream* st) const; |
0 | 1478 #endif |
1479 }; | |
1480 | |
1481 // ArrayData | |
1482 // | |
1483 // A ArrayData is a base class for accessing profiling data which does | |
1484 // not have a statically known size. It consists of an array length | |
1485 // and an array start. | |
1486 class ArrayData : public ProfileData { | |
1487 protected: | |
1488 friend class DataLayout; | |
1489 | |
1490 enum { | |
1491 array_len_off_set, | |
1492 array_start_off_set | |
1493 }; | |
1494 | |
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1495 uint array_uint_at(int index) const { |
0 | 1496 int aindex = index + array_start_off_set; |
1497 return uint_at(aindex); | |
1498 } | |
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1499 int array_int_at(int index) const { |
0 | 1500 int aindex = index + array_start_off_set; |
1501 return int_at(aindex); | |
1502 } | |
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1503 oop array_oop_at(int index) const { |
0 | 1504 int aindex = index + array_start_off_set; |
1505 return oop_at(aindex); | |
1506 } | |
1507 void array_set_int_at(int index, int value) { | |
1508 int aindex = index + array_start_off_set; | |
1509 set_int_at(aindex, value); | |
1510 } | |
1511 | |
1512 // Code generation support for subclasses. | |
1513 static ByteSize array_element_offset(int index) { | |
1514 return cell_offset(array_start_off_set + index); | |
1515 } | |
1516 | |
1517 public: | |
1518 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1519 | |
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1520 virtual bool is_ArrayData() const { return true; } |
0 | 1521 |
1522 static int static_cell_count() { | |
1523 return -1; | |
1524 } | |
1525 | |
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1526 int array_len() const { |
0 | 1527 return int_at_unchecked(array_len_off_set); |
1528 } | |
1529 | |
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1530 virtual int cell_count() const { |
0 | 1531 return array_len() + 1; |
1532 } | |
1533 | |
1534 // Code generation support | |
1535 static ByteSize array_len_offset() { | |
1536 return cell_offset(array_len_off_set); | |
1537 } | |
1538 static ByteSize array_start_offset() { | |
1539 return cell_offset(array_start_off_set); | |
1540 } | |
1541 }; | |
1542 | |
1543 // MultiBranchData | |
1544 // | |
1545 // A MultiBranchData is used to access profiling information for | |
1546 // a multi-way branch (*switch bytecodes). It consists of a series | |
1547 // of (count, displacement) pairs, which count the number of times each | |
1548 // case was taken and specify the data displacment for each branch target. | |
1549 class MultiBranchData : public ArrayData { | |
1550 protected: | |
1551 enum { | |
1552 default_count_off_set, | |
1553 default_disaplacement_off_set, | |
1554 case_array_start | |
1555 }; | |
1556 enum { | |
1557 relative_count_off_set, | |
1558 relative_displacement_off_set, | |
1559 per_case_cell_count | |
1560 }; | |
1561 | |
1562 void set_default_displacement(int displacement) { | |
1563 array_set_int_at(default_disaplacement_off_set, displacement); | |
1564 } | |
1565 void set_displacement_at(int index, int displacement) { | |
1566 array_set_int_at(case_array_start + | |
1567 index * per_case_cell_count + | |
1568 relative_displacement_off_set, | |
1569 displacement); | |
1570 } | |
1571 | |
1572 public: | |
1573 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1574 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1575 } | |
1576 | |
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1577 virtual bool is_MultiBranchData() const { return true; } |
0 | 1578 |
1579 static int compute_cell_count(BytecodeStream* stream); | |
1580 | |
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1581 int number_of_cases() const { |
0 | 1582 int alen = array_len() - 2; // get rid of default case here. |
1583 assert(alen % per_case_cell_count == 0, "must be even"); | |
1584 return (alen / per_case_cell_count); | |
1585 } | |
1586 | |
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1587 uint default_count() const { |
0 | 1588 return array_uint_at(default_count_off_set); |
1589 } | |
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1590 int default_displacement() const { |
0 | 1591 return array_int_at(default_disaplacement_off_set); |
1592 } | |
1593 | |
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1594 uint count_at(int index) const { |
0 | 1595 return array_uint_at(case_array_start + |
1596 index * per_case_cell_count + | |
1597 relative_count_off_set); | |
1598 } | |
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1599 int displacement_at(int index) const { |
0 | 1600 return array_int_at(case_array_start + |
1601 index * per_case_cell_count + | |
1602 relative_displacement_off_set); | |
1603 } | |
1604 | |
1605 // Code generation support | |
1606 static ByteSize default_count_offset() { | |
1607 return array_element_offset(default_count_off_set); | |
1608 } | |
1609 static ByteSize default_displacement_offset() { | |
1610 return array_element_offset(default_disaplacement_off_set); | |
1611 } | |
1612 static ByteSize case_count_offset(int index) { | |
1613 return case_array_offset() + | |
1614 (per_case_size() * index) + | |
1615 relative_count_offset(); | |
1616 } | |
1617 static ByteSize case_array_offset() { | |
1618 return array_element_offset(case_array_start); | |
1619 } | |
1620 static ByteSize per_case_size() { | |
1621 return in_ByteSize(per_case_cell_count) * cell_size; | |
1622 } | |
1623 static ByteSize relative_count_offset() { | |
1624 return in_ByteSize(relative_count_off_set) * cell_size; | |
1625 } | |
1626 static ByteSize relative_displacement_offset() { | |
1627 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1628 } | |
1629 | |
1630 // Specific initialization. | |
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1631 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1632 |
1633 #ifndef PRODUCT | |
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1634 void print_data_on(outputStream* st) const; |
0 | 1635 #endif |
1636 }; | |
1637 | |
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1638 class ArgInfoData : public ArrayData { |
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1639 |
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1640 public: |
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1641 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1642 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1643 } |
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1644 |
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1645 virtual bool is_ArgInfoData() const { return true; } |
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1646 |
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1647 |
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1648 int number_of_args() const { |
45
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1649 return array_len(); |
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1650 } |
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1651 |
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1652 uint arg_modified(int arg) const { |
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1653 return array_uint_at(arg); |
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1654 } |
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1655 |
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1656 void set_arg_modified(int arg, uint val) { |
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1657 array_set_int_at(arg, val); |
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1658 } |
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1659 |
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1660 #ifndef PRODUCT |
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1661 void print_data_on(outputStream* st) const; |
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1662 #endif |
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1663 }; |
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1664 |
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1665 // MethodData* |
0 | 1666 // |
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1667 // A MethodData* holds information which has been collected about |
0 | 1668 // a method. Its layout looks like this: |
1669 // | |
1670 // ----------------------------- | |
1671 // | header | | |
1672 // | klass | | |
1673 // ----------------------------- | |
1674 // | method | | |
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1675 // | size of the MethodData* | |
0 | 1676 // ----------------------------- |
1677 // | Data entries... | | |
1678 // | (variable size) | | |
1679 // | | | |
1680 // . . | |
1681 // . . | |
1682 // . . | |
1683 // | | | |
1684 // ----------------------------- | |
1685 // | |
1686 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1687 // DataLayout in the array corresponds to a specific bytecode in the | |
1688 // method. The entries in the array are sorted by the corresponding | |
1689 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1690 // which point to the underlying blocks of DataLayout structures. | |
1691 // | |
1692 // During interpretation, if profiling in enabled, the interpreter | |
1693 // maintains a method data pointer (mdp), which points at the entry | |
1694 // in the array corresponding to the current bci. In the course of | |
1695 // intepretation, when a bytecode is encountered that has profile data | |
1696 // associated with it, the entry pointed to by mdp is updated, then the | |
1697 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1698 // is NULL to begin with, the interpreter assumes that the current method | |
1699 // is not (yet) being profiled. | |
1700 // | |
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1701 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1702 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1703 // from the base of the data entry array. A "displacement" is the byte offset | |
1704 // in certain ProfileData objects that indicate the amount the mdp must be | |
1705 // adjusted in the event of a change in control flow. | |
1706 // | |
1707 | |
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1708 class MethodData : public Metadata { |
0 | 1709 friend class VMStructs; |
1710 private: | |
1711 friend class ProfileData; | |
1712 | |
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1713 // Back pointer to the Method* |
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1714 Method* _method; |
0 | 1715 |
1716 // Size of this oop in bytes | |
1717 int _size; | |
1718 | |
1719 // Cached hint for bci_to_dp and bci_to_data | |
1720 int _hint_di; | |
1721 | |
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1722 MethodData(methodHandle method, int size, TRAPS); |
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1723 public: |
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1724 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1725 MethodData() {}; // For ciMethodData |
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1726 |
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1727 bool is_methodData() const volatile { return true; } |
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1728 |
0 | 1729 // Whole-method sticky bits and flags |
1730 enum { | |
3345 | 1731 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1732 _trap_hist_mask = max_jubyte, |
1733 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1734 }; // Public flag values | |
1735 private: | |
1736 uint _nof_decompiles; // count of all nmethod removals | |
1737 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1738 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1739 union { | |
1740 intptr_t _align; | |
1741 u1 _array[_trap_hist_limit]; | |
1742 } _trap_hist; | |
1743 | |
1744 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1745 intx _eflags; // flags on escape information | |
1746 intx _arg_local; // bit set of non-escaping arguments | |
1747 intx _arg_stack; // bit set of stack-allocatable arguments | |
1748 intx _arg_returned; // bit set of returned arguments | |
1749 | |
1783 | 1750 int _creation_mileage; // method mileage at MDO creation |
1751 | |
1752 // How many invocations has this MDO seen? | |
1753 // These counters are used to determine the exact age of MDO. | |
1754 // We need those because in tiered a method can be concurrently | |
1755 // executed at different levels. | |
1756 InvocationCounter _invocation_counter; | |
1757 // Same for backedges. | |
1758 InvocationCounter _backedge_counter; | |
2252 | 1759 // Counter values at the time profiling started. |
1760 int _invocation_counter_start; | |
1761 int _backedge_counter_start; | |
1783 | 1762 // Number of loops and blocks is computed when compiling the first |
1763 // time with C1. It is used to determine if method is trivial. | |
1764 short _num_loops; | |
1765 short _num_blocks; | |
1766 // Highest compile level this method has ever seen. | |
1767 u1 _highest_comp_level; | |
1768 // Same for OSR level | |
1769 u1 _highest_osr_comp_level; | |
1770 // Does this method contain anything worth profiling? | |
1771 bool _would_profile; | |
0 | 1772 |
1773 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1774 int _data_size; | |
1775 | |
1776 // Beginning of the data entries | |
1777 intptr_t _data[1]; | |
1778 | |
1779 // Helper for size computation | |
1780 static int compute_data_size(BytecodeStream* stream); | |
1781 static int bytecode_cell_count(Bytecodes::Code code); | |
1782 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1783 | |
1784 // Helper for initialization | |
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1785 DataLayout* data_layout_at(int data_index) const { |
0 | 1786 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1787 return (DataLayout*) (((address)_data) + data_index); | |
1788 } | |
1789 | |
1790 // Initialize an individual data segment. Returns the size of | |
1791 // the segment in bytes. | |
1792 int initialize_data(BytecodeStream* stream, int data_index); | |
1793 | |
1794 // Helper for data_at | |
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1795 DataLayout* limit_data_position() const { |
0 | 1796 return (DataLayout*)((address)data_base() + _data_size); |
1797 } | |
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1798 bool out_of_bounds(int data_index) const { |
0 | 1799 return data_index >= data_size(); |
1800 } | |
1801 | |
1802 // Give each of the data entries a chance to perform specific | |
1803 // data initialization. | |
1804 void post_initialize(BytecodeStream* stream); | |
1805 | |
1806 // hint accessors | |
1807 int hint_di() const { return _hint_di; } | |
1808 void set_hint_di(int di) { | |
1809 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1810 _hint_di = di; | |
1811 } | |
1812 ProfileData* data_before(int bci) { | |
1813 // avoid SEGV on this edge case | |
1814 if (data_size() == 0) | |
1815 return NULL; | |
1816 int hint = hint_di(); | |
1817 if (data_layout_at(hint)->bci() <= bci) | |
1818 return data_at(hint); | |
1819 return first_data(); | |
1820 } | |
1821 | |
1822 // What is the index of the first data entry? | |
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1823 int first_di() const { return 0; } |
0 | 1824 |
1825 // Find or create an extra ProfileData: | |
1826 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1827 | |
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1828 // return the argument info cell |
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1829 ArgInfoData *arg_info(); |
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1830 |
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1831 enum { |
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1832 no_type_profile = 0, |
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1833 type_profile_jsr292 = 1, |
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1834 type_profile_all = 2 |
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1835 }; |
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1836 |
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1837 static bool profile_jsr292(methodHandle m, int bci); |
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1838 static int profile_arguments_flag(); |
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1839 static bool profile_arguments_jsr292_only(); |
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1840 static bool profile_all_arguments(); |
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1841 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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1842 static int profile_return_flag(); |
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1843 static bool profile_all_return(); |
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1844 static bool profile_return_for_invoke(methodHandle m, int bci); |
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1845 |
0 | 1846 public: |
1847 static int header_size() { | |
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1848 return sizeof(MethodData)/wordSize; |
0 | 1849 } |
1850 | |
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1851 // Compute the size of a MethodData* before it is created. |
0 | 1852 static int compute_allocation_size_in_bytes(methodHandle method); |
1853 static int compute_allocation_size_in_words(methodHandle method); | |
1854 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1855 | |
1856 // Determine if a given bytecode can have profile information. | |
1857 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1858 return bytecode_cell_count(code) != no_profile_data; | |
1859 } | |
1860 | |
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1861 // reset into original state |
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1862 void init(); |
0 | 1863 |
1864 // My size | |
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1865 int size_in_bytes() const { return _size; } |
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1866 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 1867 #if INCLUDE_SERVICES |
1868 void collect_statistics(KlassSizeStats *sz) const; | |
1869 #endif | |
0 | 1870 |
1871 int creation_mileage() const { return _creation_mileage; } | |
1872 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1873 |
1874 int invocation_count() { | |
1875 if (invocation_counter()->carry()) { | |
1876 return InvocationCounter::count_limit; | |
1877 } | |
1878 return invocation_counter()->count(); | |
1879 } | |
1880 int backedge_count() { | |
1881 if (backedge_counter()->carry()) { | |
1882 return InvocationCounter::count_limit; | |
1883 } | |
1884 return backedge_counter()->count(); | |
1885 } | |
1886 | |
2252 | 1887 int invocation_count_start() { |
1888 if (invocation_counter()->carry()) { | |
1889 return 0; | |
1890 } | |
1891 return _invocation_counter_start; | |
1892 } | |
1893 | |
1894 int backedge_count_start() { | |
1895 if (backedge_counter()->carry()) { | |
1896 return 0; | |
1897 } | |
1898 return _backedge_counter_start; | |
1899 } | |
1900 | |
1901 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1902 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1903 | |
1904 void reset_start_counters() { | |
1905 _invocation_counter_start = invocation_count(); | |
1906 _backedge_counter_start = backedge_count(); | |
1907 } | |
1908 | |
1783 | 1909 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1910 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1911 | |
1912 void set_would_profile(bool p) { _would_profile = p; } | |
1913 bool would_profile() const { return _would_profile; } | |
1914 | |
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1915 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 1916 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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1917 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 1918 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
1919 | |
1920 int num_loops() const { return _num_loops; } | |
1921 void set_num_loops(int n) { _num_loops = n; } | |
1922 int num_blocks() const { return _num_blocks; } | |
1923 void set_num_blocks(int n) { _num_blocks = n; } | |
1924 | |
0 | 1925 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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1926 static int mileage_of(Method* m); |
0 | 1927 |
1928 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1929 enum EscapeFlag { | |
1930 estimated = 1 << 0, | |
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1931 return_local = 1 << 1, |
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1932 return_allocated = 1 << 2, |
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1933 allocated_escapes = 1 << 3, |
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1934 unknown_modified = 1 << 4 |
0 | 1935 }; |
1936 | |
1937 intx eflags() { return _eflags; } | |
1938 intx arg_local() { return _arg_local; } | |
1939 intx arg_stack() { return _arg_stack; } | |
1940 intx arg_returned() { return _arg_returned; } | |
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1941 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1942 assert(aid != NULL, "arg_info must be not null"); |
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1943 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1944 return aid->arg_modified(a); } |
0 | 1945 |
1946 void set_eflags(intx v) { _eflags = v; } | |
1947 void set_arg_local(intx v) { _arg_local = v; } | |
1948 void set_arg_stack(intx v) { _arg_stack = v; } | |
1949 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1950 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1951 assert(aid != NULL, "arg_info must be not null"); |
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1952 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1953 aid->set_arg_modified(a, v); } |
0 | 1954 |
1955 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
1956 | |
1957 // Location and size of data area | |
1958 address data_base() const { | |
1959 return (address) _data; | |
1960 } | |
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1961 int data_size() const { |
0 | 1962 return _data_size; |
1963 } | |
1964 | |
1965 // Accessors | |
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1966 Method* method() const { return _method; } |
0 | 1967 |
1968 // Get the data at an arbitrary (sort of) data index. | |
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1969 ProfileData* data_at(int data_index) const; |
0 | 1970 |
1971 // Walk through the data in order. | |
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1972 ProfileData* first_data() const { return data_at(first_di()); } |
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1973 ProfileData* next_data(ProfileData* current) const; |
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1974 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 1975 |
1976 // Convert a dp (data pointer) to a di (data index). | |
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1977 int dp_to_di(address dp) const { |
0 | 1978 return dp - ((address)_data); |
1979 } | |
1980 | |
1981 address di_to_dp(int di) { | |
1982 return (address)data_layout_at(di); | |
1983 } | |
1984 | |
1985 // bci to di/dp conversion. | |
1986 address bci_to_dp(int bci); | |
1987 int bci_to_di(int bci) { | |
1988 return dp_to_di(bci_to_dp(bci)); | |
1989 } | |
1990 | |
1991 // Get the data at an arbitrary bci, or NULL if there is none. | |
1992 ProfileData* bci_to_data(int bci); | |
1993 | |
1994 // Same, but try to create an extra_data record if one is needed: | |
1995 ProfileData* allocate_bci_to_data(int bci) { | |
1996 ProfileData* data = bci_to_data(bci); | |
1997 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
1998 } | |
1999 | |
2000 // Add a handful of extra data records, for trap tracking. | |
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2001 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2002 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2003 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2004 - (address)extra_data_base(); } |
2005 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
2006 | |
2007 // Return (uint)-1 for overflow. | |
2008 uint trap_count(int reason) const { | |
2009 assert((uint)reason < _trap_hist_limit, "oob"); | |
2010 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2011 } | |
2012 // For loops: | |
2013 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2014 static uint trap_count_limit() { return _trap_hist_mask; } | |
2015 uint inc_trap_count(int reason) { | |
2016 // Count another trap, anywhere in this method. | |
2017 assert(reason >= 0, "must be single trap"); | |
2018 if ((uint)reason < _trap_hist_limit) { | |
2019 uint cnt1 = 1 + _trap_hist._array[reason]; | |
2020 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
2021 _trap_hist._array[reason] = cnt1; | |
2022 return cnt1; | |
2023 } else { | |
2024 return _trap_hist_mask + (++_nof_overflow_traps); | |
2025 } | |
2026 } else { | |
2027 // Could not represent the count in the histogram. | |
2028 return (++_nof_overflow_traps); | |
2029 } | |
2030 } | |
2031 | |
2032 uint overflow_trap_count() const { | |
2033 return _nof_overflow_traps; | |
2034 } | |
2035 uint overflow_recompile_count() const { | |
2036 return _nof_overflow_recompiles; | |
2037 } | |
2038 void inc_overflow_recompile_count() { | |
2039 _nof_overflow_recompiles += 1; | |
2040 } | |
2041 uint decompile_count() const { | |
2042 return _nof_decompiles; | |
2043 } | |
2044 void inc_decompile_count() { | |
2045 _nof_decompiles += 1; | |
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2046 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2047 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2048 } |
0 | 2049 } |
2050 | |
2051 // Support for code generation | |
2052 static ByteSize data_offset() { | |
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2053 return byte_offset_of(MethodData, _data[0]); |
0 | 2054 } |
2055 | |
1783 | 2056 static ByteSize invocation_counter_offset() { |
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2057 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2058 } |
2059 static ByteSize backedge_counter_offset() { | |
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2060 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2061 } |
2062 | |
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2063 // Deallocation support - no pointer fields to deallocate |
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2064 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2065 |
0 | 2066 // GC support |
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2067 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2068 |
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2069 // Printing |
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2070 #ifndef PRODUCT |
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2071 void print_on (outputStream* st) const; |
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2072 #endif |
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2073 void print_value_on(outputStream* st) const; |
0 | 2074 |
2075 #ifndef PRODUCT | |
2076 // printing support for method data | |
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2077 void print_data_on(outputStream* st) const; |
0 | 2078 #endif |
2079 | |
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2080 const char* internal_name() const { return "{method data}"; } |
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2081 |
0 | 2082 // verification |
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2083 void verify_on(outputStream* st); |
0 | 2084 void verify_data_on(outputStream* st); |
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2085 |
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2086 static bool profile_arguments(); |
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2087 static bool profile_return(); |
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2088 static bool profile_return_jsr292_only(); |
0 | 2089 }; |
1972 | 2090 |
2091 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |