Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.hpp @ 16016:a1b9340534bf
made UseGraalCompilationQueue false by default to see if perf. issue(s) still exist
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 04 Jun 2014 15:59:26 +0200 |
parents | 4ca6dc0799b6 |
children | e165f4223650 |
rev | line source |
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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, |
14909 | 123 parameters_type_data_tag |
0 | 124 }; |
125 | |
126 enum { | |
127 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
128 // The trap state breaks down further as [recompile:1 | reason:3]. | |
129 // This further breakdown is defined in deoptimization.cpp. | |
130 // See Deoptimization::trap_state_reason for an assert that | |
131 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
132 // | |
133 // The trap_state is collected only if ProfileTraps is true. | |
134 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
135 trap_shift = BitsPerByte - trap_bits, | |
136 trap_mask = right_n_bits(trap_bits), | |
137 trap_mask_in_place = (trap_mask << trap_shift), | |
138 flag_limit = trap_shift, | |
139 flag_mask = right_n_bits(flag_limit), | |
140 first_flag = 0 | |
141 }; | |
142 | |
143 // Size computation | |
144 static int header_size_in_bytes() { | |
145 return cell_size; | |
146 } | |
147 static int header_size_in_cells() { | |
148 return 1; | |
149 } | |
150 | |
151 static int compute_size_in_bytes(int cell_count) { | |
152 return header_size_in_bytes() + cell_count * cell_size; | |
153 } | |
154 | |
155 // Initialization | |
156 void initialize(u1 tag, u2 bci, int cell_count); | |
157 | |
158 // Accessors | |
159 u1 tag() { | |
160 return _header._struct._tag; | |
161 } | |
162 | |
163 // Return a few bits of trap state. Range is [0..trap_mask]. | |
164 // The state tells if traps with zero, one, or many reasons have occurred. | |
165 // It also tells whether zero or many recompilations have occurred. | |
166 // The associated trap histogram in the MDO itself tells whether | |
167 // traps are common or not. If a BCI shows that a trap X has | |
168 // occurred, and the MDO shows N occurrences of X, we make the | |
169 // simplifying assumption that all N occurrences can be blamed | |
170 // on that BCI. | |
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171 int trap_state() const { |
0 | 172 return ((_header._struct._flags >> trap_shift) & trap_mask); |
173 } | |
174 | |
175 void set_trap_state(int new_state) { | |
176 assert(ProfileTraps, "used only under +ProfileTraps"); | |
177 uint old_flags = (_header._struct._flags & flag_mask); | |
178 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
179 } | |
180 | |
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181 u1 flags() const { |
0 | 182 return _header._struct._flags; |
183 } | |
184 | |
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185 u2 bci() const { |
0 | 186 return _header._struct._bci; |
187 } | |
188 | |
189 void set_header(intptr_t value) { | |
190 _header._bits = value; | |
191 } | |
14909 | 192 void release_set_header(intptr_t value) { |
193 OrderAccess::release_store_ptr(&_header._bits, value); | |
0 | 194 } |
195 intptr_t header() { | |
196 return _header._bits; | |
197 } | |
198 void set_cell_at(int index, intptr_t value) { | |
199 _cells[index] = value; | |
200 } | |
201 void release_set_cell_at(int index, intptr_t value) { | |
202 OrderAccess::release_store_ptr(&_cells[index], value); | |
203 } | |
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204 intptr_t cell_at(int index) const { |
0 | 205 return _cells[index]; |
206 } | |
207 | |
208 void set_flag_at(int flag_number) { | |
209 assert(flag_number < flag_limit, "oob"); | |
210 _header._struct._flags |= (0x1 << flag_number); | |
211 } | |
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212 bool flag_at(int flag_number) const { |
0 | 213 assert(flag_number < flag_limit, "oob"); |
214 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
215 } | |
216 | |
217 // Low-level support for code generation. | |
218 static ByteSize header_offset() { | |
219 return byte_offset_of(DataLayout, _header); | |
220 } | |
221 static ByteSize tag_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._tag); | |
223 } | |
224 static ByteSize flags_offset() { | |
225 return byte_offset_of(DataLayout, _header._struct._flags); | |
226 } | |
227 static ByteSize bci_offset() { | |
228 return byte_offset_of(DataLayout, _header._struct._bci); | |
229 } | |
230 static ByteSize cell_offset(int index) { | |
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231 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 232 } |
233 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
234 static int flag_number_to_byte_constant(int flag_number) { | |
235 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
236 DataLayout temp; temp.set_header(0); | |
237 temp.set_flag_at(flag_number); | |
238 return temp._header._struct._flags; | |
239 } | |
240 // Return a value which, when or-ed as a word into _header, sets the flag. | |
241 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
242 DataLayout temp; temp.set_header(0); | |
243 temp._header._struct._flags = byte_constant; | |
244 return temp._header._bits; | |
245 } | |
941 | 246 |
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247 ProfileData* data_in(); |
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248 |
941 | 249 // GC support |
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250 void clean_weak_klass_links(BoolObjectClosure* cl); |
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251 |
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252 // Redefinition support |
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253 void clean_weak_method_links(); |
0 | 254 }; |
255 | |
256 | |
257 // ProfileData class hierarchy | |
258 class ProfileData; | |
259 class BitData; | |
260 class CounterData; | |
261 class ReceiverTypeData; | |
262 class VirtualCallData; | |
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263 class VirtualCallTypeData; |
0 | 264 class RetData; |
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265 class CallTypeData; |
0 | 266 class JumpData; |
267 class BranchData; | |
268 class ArrayData; | |
269 class MultiBranchData; | |
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270 class ArgInfoData; |
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271 class ParametersTypeData; |
0 | 272 |
273 // ProfileData | |
274 // | |
275 // A ProfileData object is created to refer to a section of profiling | |
276 // data in a structured way. | |
277 class ProfileData : public ResourceObj { | |
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278 friend class TypeEntries; |
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279 friend class ReturnTypeEntry; |
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280 friend class TypeStackSlotEntries; |
0 | 281 private: |
282 #ifndef PRODUCT | |
283 enum { | |
284 tab_width_one = 16, | |
285 tab_width_two = 36 | |
286 }; | |
287 #endif // !PRODUCT | |
288 | |
289 // This is a pointer to a section of profiling data. | |
290 DataLayout* _data; | |
291 | |
292 protected: | |
293 DataLayout* data() { return _data; } | |
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294 const DataLayout* data() const { return _data; } |
0 | 295 |
296 enum { | |
297 cell_size = DataLayout::cell_size | |
298 }; | |
299 | |
300 public: | |
301 // How many cells are in this? | |
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302 virtual int cell_count() const { |
0 | 303 ShouldNotReachHere(); |
304 return -1; | |
305 } | |
306 | |
307 // Return the size of this data. | |
308 int size_in_bytes() { | |
309 return DataLayout::compute_size_in_bytes(cell_count()); | |
310 } | |
311 | |
312 protected: | |
313 // Low-level accessors for underlying data | |
314 void set_intptr_at(int index, intptr_t value) { | |
315 assert(0 <= index && index < cell_count(), "oob"); | |
316 data()->set_cell_at(index, value); | |
317 } | |
318 void release_set_intptr_at(int index, intptr_t value) { | |
319 assert(0 <= index && index < cell_count(), "oob"); | |
320 data()->release_set_cell_at(index, value); | |
321 } | |
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322 intptr_t intptr_at(int index) const { |
0 | 323 assert(0 <= index && index < cell_count(), "oob"); |
324 return data()->cell_at(index); | |
325 } | |
326 void set_uint_at(int index, uint value) { | |
327 set_intptr_at(index, (intptr_t) value); | |
328 } | |
329 void release_set_uint_at(int index, uint value) { | |
330 release_set_intptr_at(index, (intptr_t) value); | |
331 } | |
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332 uint uint_at(int index) const { |
0 | 333 return (uint)intptr_at(index); |
334 } | |
335 void set_int_at(int index, int value) { | |
336 set_intptr_at(index, (intptr_t) value); | |
337 } | |
338 void release_set_int_at(int index, int value) { | |
339 release_set_intptr_at(index, (intptr_t) value); | |
340 } | |
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341 int int_at(int index) const { |
0 | 342 return (int)intptr_at(index); |
343 } | |
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344 int int_at_unchecked(int index) const { |
0 | 345 return (int)data()->cell_at(index); |
346 } | |
347 void set_oop_at(int index, oop value) { | |
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348 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 349 } |
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350 oop oop_at(int index) const { |
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351 return cast_to_oop(intptr_at(index)); |
0 | 352 } |
353 | |
354 void set_flag_at(int flag_number) { | |
355 data()->set_flag_at(flag_number); | |
356 } | |
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357 bool flag_at(int flag_number) const { |
0 | 358 return data()->flag_at(flag_number); |
359 } | |
360 | |
361 // two convenient imports for use by subclasses: | |
362 static ByteSize cell_offset(int index) { | |
363 return DataLayout::cell_offset(index); | |
364 } | |
365 static int flag_number_to_byte_constant(int flag_number) { | |
366 return DataLayout::flag_number_to_byte_constant(flag_number); | |
367 } | |
368 | |
369 ProfileData(DataLayout* data) { | |
370 _data = data; | |
371 } | |
372 | |
373 public: | |
374 // Constructor for invalid ProfileData. | |
375 ProfileData(); | |
376 | |
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377 u2 bci() const { |
0 | 378 return data()->bci(); |
379 } | |
380 | |
381 address dp() { | |
382 return (address)_data; | |
383 } | |
384 | |
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385 int trap_state() const { |
0 | 386 return data()->trap_state(); |
387 } | |
388 void set_trap_state(int new_state) { | |
389 data()->set_trap_state(new_state); | |
390 } | |
391 | |
392 // Type checking | |
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393 virtual bool is_BitData() const { return false; } |
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394 virtual bool is_CounterData() const { return false; } |
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395 virtual bool is_JumpData() const { return false; } |
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396 virtual bool is_ReceiverTypeData()const { return false; } |
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397 virtual bool is_VirtualCallData() const { return false; } |
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398 virtual bool is_RetData() const { return false; } |
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399 virtual bool is_BranchData() const { return false; } |
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400 virtual bool is_ArrayData() const { return false; } |
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401 virtual bool is_MultiBranchData() const { return false; } |
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402 virtual bool is_ArgInfoData() const { return false; } |
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403 virtual bool is_CallTypeData() const { return false; } |
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404 virtual bool is_VirtualCallTypeData()const { return false; } |
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405 virtual bool is_ParametersTypeData() const { return false; } |
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406 |
0 | 407 |
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408 BitData* as_BitData() const { |
0 | 409 assert(is_BitData(), "wrong type"); |
410 return is_BitData() ? (BitData*) this : NULL; | |
411 } | |
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412 CounterData* as_CounterData() const { |
0 | 413 assert(is_CounterData(), "wrong type"); |
414 return is_CounterData() ? (CounterData*) this : NULL; | |
415 } | |
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416 JumpData* as_JumpData() const { |
0 | 417 assert(is_JumpData(), "wrong type"); |
418 return is_JumpData() ? (JumpData*) this : NULL; | |
419 } | |
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420 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 421 assert(is_ReceiverTypeData(), "wrong type"); |
422 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
423 } | |
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424 VirtualCallData* as_VirtualCallData() const { |
0 | 425 assert(is_VirtualCallData(), "wrong type"); |
426 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
427 } | |
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428 RetData* as_RetData() const { |
0 | 429 assert(is_RetData(), "wrong type"); |
430 return is_RetData() ? (RetData*) this : NULL; | |
431 } | |
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432 BranchData* as_BranchData() const { |
0 | 433 assert(is_BranchData(), "wrong type"); |
434 return is_BranchData() ? (BranchData*) this : NULL; | |
435 } | |
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436 ArrayData* as_ArrayData() const { |
0 | 437 assert(is_ArrayData(), "wrong type"); |
438 return is_ArrayData() ? (ArrayData*) this : NULL; | |
439 } | |
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440 MultiBranchData* as_MultiBranchData() const { |
0 | 441 assert(is_MultiBranchData(), "wrong type"); |
442 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
443 } | |
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444 ArgInfoData* as_ArgInfoData() const { |
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445 assert(is_ArgInfoData(), "wrong type"); |
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446 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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447 } |
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448 CallTypeData* as_CallTypeData() const { |
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449 assert(is_CallTypeData(), "wrong type"); |
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450 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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451 } |
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452 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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453 assert(is_VirtualCallTypeData(), "wrong type"); |
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454 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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455 } |
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456 ParametersTypeData* as_ParametersTypeData() const { |
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457 assert(is_ParametersTypeData(), "wrong type"); |
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458 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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459 } |
0 | 460 |
461 | |
462 // Subclass specific initialization | |
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463 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 464 |
465 // GC support | |
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466 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 467 |
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468 // Redefinition support |
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469 virtual void clean_weak_method_links() {} |
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470 |
0 | 471 // CI translation: ProfileData can represent both MethodDataOop data |
472 // as well as CIMethodData data. This function is provided for translating | |
473 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
474 // most ProfileData don't require any translation, so we provide the null | |
475 // translation here, and the required translators are in the ci subclasses. | |
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476 virtual void translate_from(const ProfileData* data) {} |
0 | 477 |
14909 | 478 virtual void print_data_on(outputStream* st) const { |
0 | 479 ShouldNotReachHere(); |
480 } | |
481 | |
482 #ifndef PRODUCT | |
14909 | 483 void print_shared(outputStream* st, const char* name) const; |
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484 void tab(outputStream* st, bool first = false) const; |
0 | 485 #endif |
486 }; | |
487 | |
488 // BitData | |
489 // | |
490 // A BitData holds a flag or two in its header. | |
491 class BitData : public ProfileData { | |
492 protected: | |
493 enum { | |
494 // null_seen: | |
495 // saw a null operand (cast/aastore/instanceof) | |
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496 null_seen_flag = DataLayout::first_flag + 0 |
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497 #ifdef GRAAL |
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498 // bytecode threw any exception |
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499 , exception_seen_flag = null_seen_flag + 1 |
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500 #endif |
0 | 501 }; |
502 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
503 public: | |
504 BitData(DataLayout* layout) : ProfileData(layout) { | |
505 } | |
506 | |
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507 virtual bool is_BitData() const { return true; } |
0 | 508 |
509 static int static_cell_count() { | |
510 return bit_cell_count; | |
511 } | |
512 | |
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513 virtual int cell_count() const { |
0 | 514 return static_cell_count(); |
515 } | |
516 | |
517 // Accessor | |
518 | |
519 // The null_seen flag bit is specially known to the interpreter. | |
520 // Consulting it allows the compiler to avoid setting up null_check traps. | |
521 bool null_seen() { return flag_at(null_seen_flag); } | |
522 void set_null_seen() { set_flag_at(null_seen_flag); } | |
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523 #ifdef GRAAL |
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524 // true if an exception was thrown at the specific BCI |
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525 bool exception_seen() { return flag_at(exception_seen_flag); } |
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526 void set_exception_seen() { set_flag_at(exception_seen_flag); } |
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527 #endif |
0 | 528 |
529 // Code generation support | |
530 static int null_seen_byte_constant() { | |
531 return flag_number_to_byte_constant(null_seen_flag); | |
532 } | |
533 | |
534 static ByteSize bit_data_size() { | |
535 return cell_offset(bit_cell_count); | |
536 } | |
537 | |
538 #ifndef PRODUCT | |
14909 | 539 void print_data_on(outputStream* st) const; |
0 | 540 #endif |
541 }; | |
542 | |
543 // CounterData | |
544 // | |
545 // A CounterData corresponds to a simple counter. | |
546 class CounterData : public BitData { | |
547 protected: | |
548 enum { | |
549 count_off, | |
550 counter_cell_count | |
551 }; | |
552 public: | |
553 CounterData(DataLayout* layout) : BitData(layout) {} | |
554 | |
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555 virtual bool is_CounterData() const { return true; } |
0 | 556 |
557 static int static_cell_count() { | |
558 return counter_cell_count; | |
559 } | |
560 | |
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561 virtual int cell_count() const { |
0 | 562 return static_cell_count(); |
563 } | |
564 | |
565 // Direct accessor | |
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566 uint count() const { |
0 | 567 return uint_at(count_off); |
568 } | |
569 | |
570 // Code generation support | |
571 static ByteSize count_offset() { | |
572 return cell_offset(count_off); | |
573 } | |
574 static ByteSize counter_data_size() { | |
575 return cell_offset(counter_cell_count); | |
576 } | |
577 | |
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578 void set_count(uint count) { |
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579 set_uint_at(count_off, count); |
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580 } |
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581 |
0 | 582 #ifndef PRODUCT |
14909 | 583 void print_data_on(outputStream* st) const; |
0 | 584 #endif |
585 }; | |
586 | |
587 // JumpData | |
588 // | |
589 // A JumpData is used to access profiling information for a direct | |
590 // branch. It is a counter, used for counting the number of branches, | |
591 // plus a data displacement, used for realigning the data pointer to | |
592 // the corresponding target bci. | |
593 class JumpData : public ProfileData { | |
594 protected: | |
595 enum { | |
596 taken_off_set, | |
597 displacement_off_set, | |
598 jump_cell_count | |
599 }; | |
600 | |
601 void set_displacement(int displacement) { | |
602 set_int_at(displacement_off_set, displacement); | |
603 } | |
604 | |
605 public: | |
606 JumpData(DataLayout* layout) : ProfileData(layout) { | |
607 assert(layout->tag() == DataLayout::jump_data_tag || | |
608 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
609 } | |
610 | |
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611 virtual bool is_JumpData() const { return true; } |
0 | 612 |
613 static int static_cell_count() { | |
614 return jump_cell_count; | |
615 } | |
616 | |
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617 virtual int cell_count() const { |
0 | 618 return static_cell_count(); |
619 } | |
620 | |
621 // Direct accessor | |
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622 uint taken() const { |
0 | 623 return uint_at(taken_off_set); |
624 } | |
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625 |
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626 void set_taken(uint cnt) { |
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627 set_uint_at(taken_off_set, cnt); |
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628 } |
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629 |
0 | 630 // Saturating counter |
631 uint inc_taken() { | |
632 uint cnt = taken() + 1; | |
633 // Did we wrap? Will compiler screw us?? | |
634 if (cnt == 0) cnt--; | |
635 set_uint_at(taken_off_set, cnt); | |
636 return cnt; | |
637 } | |
638 | |
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639 int displacement() const { |
0 | 640 return int_at(displacement_off_set); |
641 } | |
642 | |
643 // Code generation support | |
644 static ByteSize taken_offset() { | |
645 return cell_offset(taken_off_set); | |
646 } | |
647 | |
648 static ByteSize displacement_offset() { | |
649 return cell_offset(displacement_off_set); | |
650 } | |
651 | |
652 // Specific initialization. | |
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653 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 654 |
655 #ifndef PRODUCT | |
14909 | 656 void print_data_on(outputStream* st) const; |
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657 #endif |
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658 }; |
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659 |
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660 // Entries in a ProfileData object to record types: it can either be |
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661 // none (no profile), unknown (conflicting profile data) or a klass if |
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662 // a single one is seen. Whether a null reference was seen is also |
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663 // recorded. No counter is associated with the type and a single type |
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664 // is tracked (unlike VirtualCallData). |
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665 class TypeEntries { |
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666 |
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667 public: |
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668 |
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669 // A single cell is used to record information for a type: |
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670 // - the cell is initialized to 0 |
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671 // - when a type is discovered it is stored in the cell |
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672 // - bit zero of the cell is used to record whether a null reference |
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673 // was encountered or not |
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674 // - bit 1 is set to record a conflict in the type information |
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675 |
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676 enum { |
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677 null_seen = 1, |
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678 type_mask = ~null_seen, |
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679 type_unknown = 2, |
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680 status_bits = null_seen | type_unknown, |
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681 type_klass_mask = ~status_bits |
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682 }; |
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683 |
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684 // what to initialize a cell to |
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685 static intptr_t type_none() { |
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686 return 0; |
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687 } |
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688 |
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689 // null seen = bit 0 set? |
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690 static bool was_null_seen(intptr_t v) { |
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691 return (v & null_seen) != 0; |
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692 } |
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693 |
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694 // conflicting type information = bit 1 set? |
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695 static bool is_type_unknown(intptr_t v) { |
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696 return (v & type_unknown) != 0; |
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697 } |
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|
698 |
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699 // not type information yet = all bits cleared, ignoring bit 0? |
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700 static bool is_type_none(intptr_t v) { |
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701 return (v & type_mask) == 0; |
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702 } |
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703 |
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704 // recorded type: cell without bit 0 and 1 |
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705 static intptr_t klass_part(intptr_t v) { |
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706 intptr_t r = v & type_klass_mask; |
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707 return r; |
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708 } |
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709 |
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710 // type recorded |
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711 static Klass* valid_klass(intptr_t k) { |
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712 if (!is_type_none(k) && |
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713 !is_type_unknown(k)) { |
13080 | 714 Klass* res = (Klass*)klass_part(k); |
715 assert(res != NULL, "invalid"); | |
716 return res; | |
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717 } else { |
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718 return NULL; |
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719 } |
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720 } |
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721 |
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722 static intptr_t with_status(intptr_t k, intptr_t in) { |
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723 return k | (in & status_bits); |
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724 } |
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725 |
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726 static intptr_t with_status(Klass* k, intptr_t in) { |
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727 return with_status((intptr_t)k, in); |
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|
728 } |
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|
729 |
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|
730 #ifndef PRODUCT |
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731 static void print_klass(outputStream* st, intptr_t k); |
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732 #endif |
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733 |
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734 // GC support |
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735 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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736 |
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737 protected: |
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738 // ProfileData object these entries are part of |
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739 ProfileData* _pd; |
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740 // offset within the ProfileData object where the entries start |
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741 const int _base_off; |
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742 |
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743 TypeEntries(int base_off) |
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744 : _base_off(base_off), _pd(NULL) {} |
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745 |
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746 void set_intptr_at(int index, intptr_t value) { |
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747 _pd->set_intptr_at(index, value); |
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748 } |
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|
749 |
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750 intptr_t intptr_at(int index) const { |
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751 return _pd->intptr_at(index); |
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|
752 } |
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|
753 |
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|
754 public: |
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|
755 void set_profile_data(ProfileData* pd) { |
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|
756 _pd = pd; |
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|
757 } |
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|
758 }; |
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|
759 |
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760 // Type entries used for arguments passed at a call and parameters on |
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761 // method entry. 2 cells per entry: one for the type encoded as in |
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762 // TypeEntries and one initialized with the stack slot where the |
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763 // profiled object is to be found so that the interpreter can locate |
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|
764 // it quickly. |
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765 class TypeStackSlotEntries : public TypeEntries { |
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|
766 |
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|
767 private: |
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|
768 enum { |
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|
769 stack_slot_entry, |
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|
770 type_entry, |
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|
771 per_arg_cell_count |
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|
772 }; |
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|
773 |
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|
774 // offset of cell for stack slot for entry i within ProfileData object |
12882
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775 int stack_slot_offset(int i) const { |
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776 return _base_off + stack_slot_local_offset(i); |
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|
777 } |
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|
778 |
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|
779 protected: |
12882
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780 const int _number_of_entries; |
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|
781 |
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|
782 // offset of cell for type for entry i within ProfileData object |
12882
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783 int type_offset(int i) const { |
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784 return _base_off + type_local_offset(i); |
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|
785 } |
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|
786 |
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|
787 public: |
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|
788 |
12882
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|
789 TypeStackSlotEntries(int base_off, int nb_entries) |
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790 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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|
791 |
12962
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|
792 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
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|
793 |
12962
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|
794 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
12875
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|
795 |
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796 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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797 static int stack_slot_local_offset(int i) { |
12882
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798 return i * per_arg_cell_count + stack_slot_entry; |
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|
799 } |
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|
800 |
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801 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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|
802 static int type_local_offset(int i) { |
12882
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803 return i * per_arg_cell_count + type_entry; |
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|
804 } |
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|
805 |
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|
806 // stack slot for entry i |
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|
807 uint stack_slot(int i) const { |
12882
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808 assert(i >= 0 && i < _number_of_entries, "oob"); |
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809 return _pd->uint_at(stack_slot_offset(i)); |
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|
810 } |
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|
811 |
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|
812 // set stack slot for entry i |
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|
813 void set_stack_slot(int i, uint num) { |
12882
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814 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
815 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
816 } |
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|
817 |
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|
818 // type for entry i |
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|
819 intptr_t type(int i) const { |
12882
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820 assert(i >= 0 && i < _number_of_entries, "oob"); |
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821 return _pd->intptr_at(type_offset(i)); |
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|
822 } |
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|
823 |
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|
824 // set type for entry i |
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|
825 void set_type(int i, intptr_t k) { |
12882
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|
826 assert(i >= 0 && i < _number_of_entries, "oob"); |
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827 _pd->set_intptr_at(type_offset(i), k); |
12875
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|
828 } |
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|
829 |
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|
830 static ByteSize per_arg_size() { |
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831 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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832 } |
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833 |
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834 static int per_arg_count() { |
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835 return per_arg_cell_count ; |
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836 } |
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837 |
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838 // GC support |
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839 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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840 |
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841 #ifndef PRODUCT |
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842 void print_data_on(outputStream* st) const; |
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843 #endif |
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844 }; |
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845 |
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846 // Type entry used for return from a call. A single cell to record the |
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847 // type. |
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848 class ReturnTypeEntry : public TypeEntries { |
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849 |
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850 private: |
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851 enum { |
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852 cell_count = 1 |
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853 }; |
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854 |
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855 public: |
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856 ReturnTypeEntry(int base_off) |
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857 : TypeEntries(base_off) {} |
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858 |
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859 void post_initialize() { |
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860 set_type(type_none()); |
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861 } |
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862 |
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863 intptr_t type() const { |
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864 return _pd->intptr_at(_base_off); |
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865 } |
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866 |
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867 void set_type(intptr_t k) { |
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868 _pd->set_intptr_at(_base_off, k); |
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869 } |
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870 |
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871 static int static_cell_count() { |
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872 return cell_count; |
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873 } |
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874 |
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875 static ByteSize size() { |
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876 return in_ByteSize(cell_count * DataLayout::cell_size); |
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877 } |
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878 |
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879 ByteSize type_offset() { |
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880 return DataLayout::cell_offset(_base_off); |
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881 } |
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882 |
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883 // GC support |
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884 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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885 |
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886 #ifndef PRODUCT |
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887 void print_data_on(outputStream* st) const; |
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888 #endif |
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889 }; |
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890 |
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891 // Entries to collect type information at a call: contains arguments |
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892 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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893 // number of cells. Because the number of cells for the return type is |
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894 // smaller than the number of cells for the type of an arguments, the |
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895 // number of cells is used to tell how many arguments are profiled and |
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896 // whether a return value is profiled. See has_arguments() and |
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897 // has_return(). |
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898 class TypeEntriesAtCall { |
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|
899 private: |
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900 static int stack_slot_local_offset(int i) { |
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901 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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902 } |
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903 |
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904 static int argument_type_local_offset(int i) { |
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905 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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906 } |
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|
907 |
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|
908 public: |
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|
909 |
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910 static int header_cell_count() { |
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911 return 1; |
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912 } |
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913 |
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914 static int cell_count_local_offset() { |
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915 return 0; |
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916 } |
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917 |
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918 static int compute_cell_count(BytecodeStream* stream); |
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919 |
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920 static void initialize(DataLayout* dl, int base, int cell_count) { |
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921 int off = base + cell_count_local_offset(); |
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922 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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923 } |
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|
924 |
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925 static bool arguments_profiling_enabled(); |
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926 static bool return_profiling_enabled(); |
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|
927 |
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928 // Code generation support |
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929 static ByteSize cell_count_offset() { |
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930 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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931 } |
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932 |
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933 static ByteSize args_data_offset() { |
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934 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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935 } |
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936 |
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937 static ByteSize stack_slot_offset(int i) { |
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938 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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939 } |
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|
940 |
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941 static ByteSize argument_type_offset(int i) { |
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942 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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|
943 } |
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|
944 }; |
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945 |
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946 // CallTypeData |
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947 // |
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948 // A CallTypeData is used to access profiling information about a non |
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949 // virtual call for which we collect type information about arguments |
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950 // and return value. |
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951 class CallTypeData : public CounterData { |
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952 private: |
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953 // entries for arguments if any |
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954 TypeStackSlotEntries _args; |
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955 // entry for return type if any |
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956 ReturnTypeEntry _ret; |
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|
957 |
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958 int cell_count_global_offset() const { |
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959 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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960 } |
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|
961 |
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962 // number of cells not counting the header |
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|
963 int cell_count_no_header() const { |
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964 return uint_at(cell_count_global_offset()); |
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|
965 } |
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|
966 |
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967 void check_number_of_arguments(int total) { |
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968 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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969 } |
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970 |
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971 public: |
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972 CallTypeData(DataLayout* layout) : |
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973 CounterData(layout), |
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974 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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975 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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976 { |
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977 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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978 // Some compilers (VC++) don't want this passed in member initialization list |
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979 _args.set_profile_data(this); |
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980 _ret.set_profile_data(this); |
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981 } |
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982 |
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983 const TypeStackSlotEntries* args() const { |
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984 assert(has_arguments(), "no profiling of arguments"); |
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985 return &_args; |
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986 } |
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987 |
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988 const ReturnTypeEntry* ret() const { |
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989 assert(has_return(), "no profiling of return value"); |
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990 return &_ret; |
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991 } |
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992 |
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993 virtual bool is_CallTypeData() const { return true; } |
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994 |
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995 static int static_cell_count() { |
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996 return -1; |
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997 } |
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998 |
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999 static int compute_cell_count(BytecodeStream* stream) { |
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1000 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1001 } |
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1002 |
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1003 static void initialize(DataLayout* dl, int cell_count) { |
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1004 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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1005 } |
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1006 |
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1007 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1008 |
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1009 virtual int cell_count() const { |
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1010 return CounterData::static_cell_count() + |
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1011 TypeEntriesAtCall::header_cell_count() + |
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1012 int_at_unchecked(cell_count_global_offset()); |
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1013 } |
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1014 |
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1015 int number_of_arguments() const { |
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1016 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1017 } |
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1018 |
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1019 void set_argument_type(int i, Klass* k) { |
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1020 assert(has_arguments(), "no arguments!"); |
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1021 intptr_t current = _args.type(i); |
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1022 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1023 } |
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1024 |
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1025 void set_return_type(Klass* k) { |
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1026 assert(has_return(), "no return!"); |
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1027 intptr_t current = _ret.type(); |
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1028 _ret.set_type(TypeEntries::with_status(k, current)); |
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1029 } |
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1030 |
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1031 // An entry for a return value takes less space than an entry for an |
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1032 // argument so if the number of cells exceeds the number of cells |
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1033 // needed for an argument, this object contains type information for |
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1034 // at least one argument. |
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1035 bool has_arguments() const { |
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1036 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1037 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1038 return res; |
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1039 } |
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1040 |
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1041 // An entry for a return value takes less space than an entry for an |
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1042 // argument, so if the remainder of the number of cells divided by |
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1043 // the number of cells for an argument is not null, a return value |
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1044 // is profiled in this object. |
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1045 bool has_return() const { |
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1046 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1047 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1048 return res; |
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1049 } |
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1050 |
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1051 // Code generation support |
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1052 static ByteSize args_data_offset() { |
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1053 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1054 } |
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1055 |
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1056 // GC support |
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1057 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1058 if (has_arguments()) { |
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1059 _args.clean_weak_klass_links(is_alive_closure); |
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1060 } |
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1061 if (has_return()) { |
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1062 _ret.clean_weak_klass_links(is_alive_closure); |
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1063 } |
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1064 } |
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1065 |
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1066 #ifndef PRODUCT |
14909 | 1067 virtual void print_data_on(outputStream* st) const; |
0 | 1068 #endif |
1069 }; | |
1070 | |
1071 // ReceiverTypeData | |
1072 // | |
1073 // A ReceiverTypeData is used to access profiling information about a | |
1074 // dynamic type check. It consists of a counter which counts the total times | |
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1075 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1076 // which are used to store a type profile for the receiver of the check. |
1077 class ReceiverTypeData : public CounterData { | |
1078 protected: | |
1079 enum { | |
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1080 #ifdef GRAAL |
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1081 // Description of the different counters |
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1082 // ReceiverTypeData for instanceof/checkcast/aastore: |
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1083 // C1/C2: count is incremented on type overflow and decremented for failed type checks |
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1084 // Graal: count decremented for failed type checks and nonprofiled_count is incremented on type overflow |
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1085 // TODO (chaeubl): in fact, Graal should also increment the count for failed type checks to mimic the C1/C2 behavior |
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1086 // VirtualCallData for invokevirtual/invokeinterface: |
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1087 // C1/C2: count is incremented on type overflow |
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1088 // Graal: count is incremented on type overflow, nonprofiled_count is incremented on method overflow |
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1089 |
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1090 // Graal is interested in knowing the percentage of type checks involving a type not explicitly in the profile |
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1091 nonprofiled_count_off_set = counter_cell_count, |
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1092 receiver0_offset, |
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1093 #else |
0 | 1094 receiver0_offset = counter_cell_count, |
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1095 #endif |
0 | 1096 count0_offset, |
1097 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1098 }; | |
1099 | |
1100 public: | |
1101 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1102 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1103 layout->tag() == DataLayout::virtual_call_data_tag || |
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1104 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1105 } |
1106 | |
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1107 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1108 |
1109 static int static_cell_count() { | |
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1110 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count GRAAL_ONLY(+ 1); |
0 | 1111 } |
1112 | |
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1113 virtual int cell_count() const { |
0 | 1114 return static_cell_count(); |
1115 } | |
1116 | |
1117 // Direct accessors | |
1118 static uint row_limit() { | |
1119 return TypeProfileWidth; | |
1120 } | |
1121 static int receiver_cell_index(uint row) { | |
1122 return receiver0_offset + row * receiver_type_row_cell_count; | |
1123 } | |
1124 static int receiver_count_cell_index(uint row) { | |
1125 return count0_offset + row * receiver_type_row_cell_count; | |
1126 } | |
1127 | |
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1128 Klass* receiver(uint row) const { |
0 | 1129 assert(row < row_limit(), "oob"); |
1130 | |
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1131 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1132 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1133 return recv; |
1134 } | |
1135 | |
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1136 void set_receiver(uint row, Klass* k) { |
941 | 1137 assert((uint)row < row_limit(), "oob"); |
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1138 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1139 } |
1140 | |
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1141 uint receiver_count(uint row) const { |
0 | 1142 assert(row < row_limit(), "oob"); |
1143 return uint_at(receiver_count_cell_index(row)); | |
1144 } | |
1145 | |
941 | 1146 void set_receiver_count(uint row, uint count) { |
1147 assert(row < row_limit(), "oob"); | |
1148 set_uint_at(receiver_count_cell_index(row), count); | |
1149 } | |
1150 | |
1151 void clear_row(uint row) { | |
1152 assert(row < row_limit(), "oob"); | |
1251
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1153 // Clear total count - indicator of polymorphic call site. |
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1154 // The site may look like as monomorphic after that but |
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1155 // it allow to have more accurate profiling information because |
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1156 // there was execution phase change since klasses were unloaded. |
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1157 // If the site is still polymorphic then MDO will be updated |
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1158 // to reflect it. But it could be the case that the site becomes |
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1159 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1160 // Even if we use monomorphic (when it is not) for compilation |
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1161 // we will only have trap, deoptimization and recompile again |
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1162 // with updated MDO after executing method in Interpreter. |
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1163 // An additional receiver will be recorded in the cleaned row |
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1164 // during next call execution. |
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1165 // |
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1166 // Note: our profiling logic works with empty rows in any slot. |
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1167 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1168 // |
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1169 set_count(0); |
941 | 1170 set_receiver(row, NULL); |
1171 set_receiver_count(row, 0); | |
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1172 #ifdef GRAAL |
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1173 if (!this->is_VirtualCallData()) { |
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1174 // if this is a ReceiverTypeData for Graal, the nonprofiled_count |
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1175 // must also be reset (see "Description of the different counters" above) |
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1176 set_nonprofiled_count(0); |
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1177 } |
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1178 #endif |
941 | 1179 } |
1180 | |
0 | 1181 // Code generation support |
1182 static ByteSize receiver_offset(uint row) { | |
1183 return cell_offset(receiver_cell_index(row)); | |
1184 } | |
1185 static ByteSize receiver_count_offset(uint row) { | |
1186 return cell_offset(receiver_count_cell_index(row)); | |
1187 } | |
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1188 #ifdef GRAAL |
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1189 static ByteSize nonprofiled_receiver_count_offset() { |
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1190 return cell_offset(nonprofiled_count_off_set); |
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1191 } |
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1192 uint nonprofiled_count() const { |
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1193 return uint_at(nonprofiled_count_off_set); |
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1194 } |
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1195 void set_nonprofiled_count(uint count) { |
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1196 set_uint_at(nonprofiled_count_off_set, count); |
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1197 } |
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1198 #endif |
0 | 1199 static ByteSize receiver_type_data_size() { |
1200 return cell_offset(static_cell_count()); | |
1201 } | |
1202 | |
1203 // GC support | |
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1204 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1205 |
1206 #ifndef PRODUCT | |
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1207 void print_receiver_data_on(outputStream* st) const; |
14909 | 1208 void print_data_on(outputStream* st) const; |
0 | 1209 #endif |
1210 }; | |
1211 | |
1212 // VirtualCallData | |
1213 // | |
1214 // A VirtualCallData is used to access profiling information about a | |
1215 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1216 class VirtualCallData : public ReceiverTypeData { | |
1217 public: | |
1218 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1219 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1220 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1221 } |
1222 | |
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1223 virtual bool is_VirtualCallData() const { return true; } |
0 | 1224 |
1225 static int static_cell_count() { | |
1226 // At this point we could add more profile state, e.g., for arguments. | |
1227 // But for now it's the same size as the base record type. | |
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1228 return ReceiverTypeData::static_cell_count() GRAAL_ONLY(+ (uint) MethodProfileWidth * receiver_type_row_cell_count); |
0 | 1229 } |
1230 | |
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1231 virtual int cell_count() const { |
0 | 1232 return static_cell_count(); |
1233 } | |
1234 | |
1235 // Direct accessors | |
1236 static ByteSize virtual_call_data_size() { | |
1237 return cell_offset(static_cell_count()); | |
1238 } | |
1239 | |
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1240 #ifdef GRAAL |
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1241 static ByteSize method_offset(uint row) { |
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1242 return cell_offset(method_cell_index(row)); |
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1243 } |
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1244 static ByteSize method_count_offset(uint row) { |
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1245 return cell_offset(method_count_cell_index(row)); |
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1246 } |
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1247 static int method_cell_index(uint row) { |
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1248 return receiver0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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1249 } |
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1250 static int method_count_cell_index(uint row) { |
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1251 return count0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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1252 } |
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1253 static uint method_row_limit() { |
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1254 return MethodProfileWidth; |
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1255 } |
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1256 |
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1257 Method* method(uint row) const { |
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1258 assert(row < method_row_limit(), "oob"); |
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1259 |
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1260 Method* method = (Method*)intptr_at(method_cell_index(row)); |
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1261 assert(method == NULL || method->is_method(), "must be"); |
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1262 return method; |
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1263 } |
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1264 |
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1265 uint method_count(uint row) const { |
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1266 assert(row < method_row_limit(), "oob"); |
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1267 return uint_at(method_count_cell_index(row)); |
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1268 } |
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1269 |
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1270 void set_method(uint row, Method* m) { |
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1271 assert((uint)row < method_row_limit(), "oob"); |
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1272 set_intptr_at(method_cell_index(row), (uintptr_t)m); |
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1273 } |
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1274 |
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1275 void set_method_count(uint row, uint count) { |
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1276 assert(row < method_row_limit(), "oob"); |
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1277 set_uint_at(method_count_cell_index(row), count); |
0 | 1278 } |
1279 | |
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1280 void clear_method_row(uint row) { |
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1281 assert(row < method_row_limit(), "oob"); |
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1282 // Clear total count - indicator of polymorphic call site (see comment for clear_row() in ReceiverTypeData). |
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1283 set_nonprofiled_count(0); |
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1284 set_method(row, NULL); |
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1285 set_method_count(row, 0); |
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1286 } |
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1287 |
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1288 // GC support |
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1289 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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1290 |
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1291 // Redefinition support |
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1292 virtual void clean_weak_method_links(); |
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Christian Haeubl <haeubl@ssw.jku.at>
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1293 #endif |
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1294 |
0 | 1295 #ifndef PRODUCT |
13108
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Doug Simon <doug.simon@oracle.com>
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1296 #ifdef GRAAL |
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1297 void print_method_data_on(outputStream* st) const; |
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1298 #endif |
14909 | 1299 void print_data_on(outputStream* st) const; |
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1300 #endif |
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1301 }; |
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1302 |
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1303 // VirtualCallTypeData |
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1304 // |
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1305 // A VirtualCallTypeData is used to access profiling information about |
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1306 // a virtual call for which we collect type information about |
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1307 // arguments and return value. |
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1308 class VirtualCallTypeData : public VirtualCallData { |
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1309 private: |
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1310 // entries for arguments if any |
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1311 TypeStackSlotEntries _args; |
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1312 // entry for return type if any |
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1313 ReturnTypeEntry _ret; |
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1314 |
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1315 int cell_count_global_offset() const { |
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1316 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1317 } |
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1318 |
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1319 // number of cells not counting the header |
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1320 int cell_count_no_header() const { |
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1321 return uint_at(cell_count_global_offset()); |
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1322 } |
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1323 |
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1324 void check_number_of_arguments(int total) { |
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1325 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1326 } |
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1327 |
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1328 public: |
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1329 VirtualCallTypeData(DataLayout* layout) : |
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1330 VirtualCallData(layout), |
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1331 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1332 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1333 { |
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1334 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1335 // Some compilers (VC++) don't want this passed in member initialization list |
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1336 _args.set_profile_data(this); |
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1337 _ret.set_profile_data(this); |
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1338 } |
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1339 |
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1340 const TypeStackSlotEntries* args() const { |
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1341 assert(has_arguments(), "no profiling of arguments"); |
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1342 return &_args; |
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1343 } |
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1344 |
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1345 const ReturnTypeEntry* ret() const { |
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1346 assert(has_return(), "no profiling of return value"); |
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1347 return &_ret; |
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1348 } |
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1349 |
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1350 virtual bool is_VirtualCallTypeData() const { return true; } |
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1351 |
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1352 static int static_cell_count() { |
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1353 return -1; |
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1354 } |
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1355 |
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1356 static int compute_cell_count(BytecodeStream* stream) { |
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1357 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1358 } |
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1359 |
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1360 static void initialize(DataLayout* dl, int cell_count) { |
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1361 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1362 } |
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1363 |
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1364 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1365 |
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1366 virtual int cell_count() const { |
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1367 return VirtualCallData::static_cell_count() + |
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1368 TypeEntriesAtCall::header_cell_count() + |
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1369 int_at_unchecked(cell_count_global_offset()); |
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1370 } |
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1371 |
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1372 int number_of_arguments() const { |
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1373 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1374 } |
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1375 |
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1376 void set_argument_type(int i, Klass* k) { |
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1377 assert(has_arguments(), "no arguments!"); |
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1378 intptr_t current = _args.type(i); |
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1379 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1380 } |
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1381 |
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1382 void set_return_type(Klass* k) { |
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1383 assert(has_return(), "no return!"); |
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1384 intptr_t current = _ret.type(); |
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1385 _ret.set_type(TypeEntries::with_status(k, current)); |
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1386 } |
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1387 |
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1388 // An entry for a return value takes less space than an entry for an |
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1389 // argument, so if the remainder of the number of cells divided by |
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1390 // the number of cells for an argument is not null, a return value |
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1391 // is profiled in this object. |
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1392 bool has_return() const { |
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1393 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1394 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1395 return res; |
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1396 } |
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1397 |
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1398 // An entry for a return value takes less space than an entry for an |
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1399 // argument so if the number of cells exceeds the number of cells |
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1400 // needed for an argument, this object contains type information for |
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1401 // at least one argument. |
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1402 bool has_arguments() const { |
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1403 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1404 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1405 return res; |
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1406 } |
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1407 |
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1408 // Code generation support |
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1409 static ByteSize args_data_offset() { |
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1410 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1411 } |
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1412 |
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1413 // GC support |
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1414 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1415 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1416 if (has_arguments()) { |
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1417 _args.clean_weak_klass_links(is_alive_closure); |
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1418 } |
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1419 if (has_return()) { |
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1420 _ret.clean_weak_klass_links(is_alive_closure); |
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1421 } |
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1422 } |
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1423 |
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|
1424 #ifndef PRODUCT |
14909 | 1425 virtual void print_data_on(outputStream* st) const; |
0 | 1426 #endif |
1427 }; | |
1428 | |
1429 // RetData | |
1430 // | |
1431 // A RetData is used to access profiling information for a ret bytecode. | |
1432 // It is composed of a count of the number of times that the ret has | |
1433 // been executed, followed by a series of triples of the form | |
1434 // (bci, count, di) which count the number of times that some bci was the | |
1435 // target of the ret and cache a corresponding data displacement. | |
1436 class RetData : public CounterData { | |
1437 protected: | |
1438 enum { | |
1439 bci0_offset = counter_cell_count, | |
1440 count0_offset, | |
1441 displacement0_offset, | |
1442 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1443 }; | |
1444 | |
1445 void set_bci(uint row, int bci) { | |
1446 assert((uint)row < row_limit(), "oob"); | |
1447 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1448 } | |
1449 void release_set_bci(uint row, int bci) { | |
1450 assert((uint)row < row_limit(), "oob"); | |
1451 // 'release' when setting the bci acts as a valid flag for other | |
1452 // threads wrt bci_count and bci_displacement. | |
1453 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1454 } | |
1455 void set_bci_count(uint row, uint count) { | |
1456 assert((uint)row < row_limit(), "oob"); | |
1457 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1458 } | |
1459 void set_bci_displacement(uint row, int disp) { | |
1460 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1461 } | |
1462 | |
1463 public: | |
1464 RetData(DataLayout* layout) : CounterData(layout) { | |
1465 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1466 } | |
1467 | |
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1468 virtual bool is_RetData() const { return true; } |
0 | 1469 |
1470 enum { | |
1471 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1472 }; | |
1473 | |
1474 static int static_cell_count() { | |
1475 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1476 } | |
1477 | |
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1478 virtual int cell_count() const { |
0 | 1479 return static_cell_count(); |
1480 } | |
1481 | |
1482 static uint row_limit() { | |
1483 return BciProfileWidth; | |
1484 } | |
1485 static int bci_cell_index(uint row) { | |
1486 return bci0_offset + row * ret_row_cell_count; | |
1487 } | |
1488 static int bci_count_cell_index(uint row) { | |
1489 return count0_offset + row * ret_row_cell_count; | |
1490 } | |
1491 static int bci_displacement_cell_index(uint row) { | |
1492 return displacement0_offset + row * ret_row_cell_count; | |
1493 } | |
1494 | |
1495 // Direct accessors | |
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1496 int bci(uint row) const { |
0 | 1497 return int_at(bci_cell_index(row)); |
1498 } | |
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1499 uint bci_count(uint row) const { |
0 | 1500 return uint_at(bci_count_cell_index(row)); |
1501 } | |
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1502 int bci_displacement(uint row) const { |
0 | 1503 return int_at(bci_displacement_cell_index(row)); |
1504 } | |
1505 | |
1506 // Interpreter Runtime support | |
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1507 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1508 |
1509 // Code generation support | |
1510 static ByteSize bci_offset(uint row) { | |
1511 return cell_offset(bci_cell_index(row)); | |
1512 } | |
1513 static ByteSize bci_count_offset(uint row) { | |
1514 return cell_offset(bci_count_cell_index(row)); | |
1515 } | |
1516 static ByteSize bci_displacement_offset(uint row) { | |
1517 return cell_offset(bci_displacement_cell_index(row)); | |
1518 } | |
1519 | |
1520 // Specific initialization. | |
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1521 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1522 |
1523 #ifndef PRODUCT | |
14909 | 1524 void print_data_on(outputStream* st) const; |
0 | 1525 #endif |
1526 }; | |
1527 | |
1528 // BranchData | |
1529 // | |
1530 // A BranchData is used to access profiling data for a two-way branch. | |
1531 // It consists of taken and not_taken counts as well as a data displacement | |
1532 // for the taken case. | |
1533 class BranchData : public JumpData { | |
1534 protected: | |
1535 enum { | |
1536 not_taken_off_set = jump_cell_count, | |
1537 branch_cell_count | |
1538 }; | |
1539 | |
1540 void set_displacement(int displacement) { | |
1541 set_int_at(displacement_off_set, displacement); | |
1542 } | |
1543 | |
1544 public: | |
1545 BranchData(DataLayout* layout) : JumpData(layout) { | |
1546 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1547 } | |
1548 | |
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1549 virtual bool is_BranchData() const { return true; } |
0 | 1550 |
1551 static int static_cell_count() { | |
1552 return branch_cell_count; | |
1553 } | |
1554 | |
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1555 virtual int cell_count() const { |
0 | 1556 return static_cell_count(); |
1557 } | |
1558 | |
1559 // Direct accessor | |
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1560 uint not_taken() const { |
0 | 1561 return uint_at(not_taken_off_set); |
1562 } | |
1563 | |
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1564 void set_not_taken(uint cnt) { |
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1565 set_uint_at(not_taken_off_set, cnt); |
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1566 } |
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1567 |
0 | 1568 uint inc_not_taken() { |
1569 uint cnt = not_taken() + 1; | |
1570 // Did we wrap? Will compiler screw us?? | |
1571 if (cnt == 0) cnt--; | |
1572 set_uint_at(not_taken_off_set, cnt); | |
1573 return cnt; | |
1574 } | |
1575 | |
1576 // Code generation support | |
1577 static ByteSize not_taken_offset() { | |
1578 return cell_offset(not_taken_off_set); | |
1579 } | |
1580 static ByteSize branch_data_size() { | |
1581 return cell_offset(branch_cell_count); | |
1582 } | |
1583 | |
1584 // Specific initialization. | |
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1585 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1586 |
1587 #ifndef PRODUCT | |
14909 | 1588 void print_data_on(outputStream* st) const; |
0 | 1589 #endif |
1590 }; | |
1591 | |
1592 // ArrayData | |
1593 // | |
1594 // A ArrayData is a base class for accessing profiling data which does | |
1595 // not have a statically known size. It consists of an array length | |
1596 // and an array start. | |
1597 class ArrayData : public ProfileData { | |
1598 protected: | |
1599 friend class DataLayout; | |
1600 | |
1601 enum { | |
1602 array_len_off_set, | |
1603 array_start_off_set | |
1604 }; | |
1605 | |
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1606 uint array_uint_at(int index) const { |
0 | 1607 int aindex = index + array_start_off_set; |
1608 return uint_at(aindex); | |
1609 } | |
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1610 int array_int_at(int index) const { |
0 | 1611 int aindex = index + array_start_off_set; |
1612 return int_at(aindex); | |
1613 } | |
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1614 oop array_oop_at(int index) const { |
0 | 1615 int aindex = index + array_start_off_set; |
1616 return oop_at(aindex); | |
1617 } | |
1618 void array_set_int_at(int index, int value) { | |
1619 int aindex = index + array_start_off_set; | |
1620 set_int_at(aindex, value); | |
1621 } | |
1622 | |
1623 // Code generation support for subclasses. | |
1624 static ByteSize array_element_offset(int index) { | |
1625 return cell_offset(array_start_off_set + index); | |
1626 } | |
1627 | |
1628 public: | |
1629 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1630 | |
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1631 virtual bool is_ArrayData() const { return true; } |
0 | 1632 |
1633 static int static_cell_count() { | |
1634 return -1; | |
1635 } | |
1636 | |
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1637 int array_len() const { |
0 | 1638 return int_at_unchecked(array_len_off_set); |
1639 } | |
1640 | |
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1641 virtual int cell_count() const { |
0 | 1642 return array_len() + 1; |
1643 } | |
1644 | |
1645 // Code generation support | |
1646 static ByteSize array_len_offset() { | |
1647 return cell_offset(array_len_off_set); | |
1648 } | |
1649 static ByteSize array_start_offset() { | |
1650 return cell_offset(array_start_off_set); | |
1651 } | |
1652 }; | |
1653 | |
1654 // MultiBranchData | |
1655 // | |
1656 // A MultiBranchData is used to access profiling information for | |
1657 // a multi-way branch (*switch bytecodes). It consists of a series | |
1658 // of (count, displacement) pairs, which count the number of times each | |
1659 // case was taken and specify the data displacment for each branch target. | |
1660 class MultiBranchData : public ArrayData { | |
1661 protected: | |
1662 enum { | |
1663 default_count_off_set, | |
1664 default_disaplacement_off_set, | |
1665 case_array_start | |
1666 }; | |
1667 enum { | |
1668 relative_count_off_set, | |
1669 relative_displacement_off_set, | |
1670 per_case_cell_count | |
1671 }; | |
1672 | |
1673 void set_default_displacement(int displacement) { | |
1674 array_set_int_at(default_disaplacement_off_set, displacement); | |
1675 } | |
1676 void set_displacement_at(int index, int displacement) { | |
1677 array_set_int_at(case_array_start + | |
1678 index * per_case_cell_count + | |
1679 relative_displacement_off_set, | |
1680 displacement); | |
1681 } | |
1682 | |
1683 public: | |
1684 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1685 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1686 } | |
1687 | |
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1688 virtual bool is_MultiBranchData() const { return true; } |
0 | 1689 |
1690 static int compute_cell_count(BytecodeStream* stream); | |
1691 | |
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1692 int number_of_cases() const { |
0 | 1693 int alen = array_len() - 2; // get rid of default case here. |
1694 assert(alen % per_case_cell_count == 0, "must be even"); | |
1695 return (alen / per_case_cell_count); | |
1696 } | |
1697 | |
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1698 uint default_count() const { |
0 | 1699 return array_uint_at(default_count_off_set); |
1700 } | |
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1701 int default_displacement() const { |
0 | 1702 return array_int_at(default_disaplacement_off_set); |
1703 } | |
1704 | |
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1705 uint count_at(int index) const { |
0 | 1706 return array_uint_at(case_array_start + |
1707 index * per_case_cell_count + | |
1708 relative_count_off_set); | |
1709 } | |
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1710 int displacement_at(int index) const { |
0 | 1711 return array_int_at(case_array_start + |
1712 index * per_case_cell_count + | |
1713 relative_displacement_off_set); | |
1714 } | |
1715 | |
1716 // Code generation support | |
1717 static ByteSize default_count_offset() { | |
1718 return array_element_offset(default_count_off_set); | |
1719 } | |
1720 static ByteSize default_displacement_offset() { | |
1721 return array_element_offset(default_disaplacement_off_set); | |
1722 } | |
1723 static ByteSize case_count_offset(int index) { | |
1724 return case_array_offset() + | |
1725 (per_case_size() * index) + | |
1726 relative_count_offset(); | |
1727 } | |
1728 static ByteSize case_array_offset() { | |
1729 return array_element_offset(case_array_start); | |
1730 } | |
1731 static ByteSize per_case_size() { | |
1732 return in_ByteSize(per_case_cell_count) * cell_size; | |
1733 } | |
1734 static ByteSize relative_count_offset() { | |
1735 return in_ByteSize(relative_count_off_set) * cell_size; | |
1736 } | |
1737 static ByteSize relative_displacement_offset() { | |
1738 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1739 } | |
1740 | |
1741 // Specific initialization. | |
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1742 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1743 |
1744 #ifndef PRODUCT | |
14909 | 1745 void print_data_on(outputStream* st) const; |
0 | 1746 #endif |
1747 }; | |
1748 | |
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1749 class ArgInfoData : public ArrayData { |
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1750 |
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1751 public: |
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1752 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1753 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1754 } |
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1755 |
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1756 virtual bool is_ArgInfoData() const { return true; } |
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1757 |
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1758 |
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1759 int number_of_args() const { |
45
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1760 return array_len(); |
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1761 } |
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1762 |
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1763 uint arg_modified(int arg) const { |
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1764 return array_uint_at(arg); |
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1765 } |
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1766 |
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1767 void set_arg_modified(int arg, uint val) { |
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1768 array_set_int_at(arg, val); |
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1769 } |
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1770 |
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1771 #ifndef PRODUCT |
14909 | 1772 void print_data_on(outputStream* st) const; |
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1773 #endif |
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1774 }; |
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1775 |
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1776 // ParametersTypeData |
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1777 // |
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1778 // A ParametersTypeData is used to access profiling information about |
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1779 // types of parameters to a method |
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1780 class ParametersTypeData : public ArrayData { |
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1781 |
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1782 private: |
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1783 TypeStackSlotEntries _parameters; |
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1784 |
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1785 static int stack_slot_local_offset(int i) { |
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1786 assert_profiling_enabled(); |
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1787 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1788 } |
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1789 |
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1790 static int type_local_offset(int i) { |
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1791 assert_profiling_enabled(); |
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1792 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1793 } |
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1794 |
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1795 static bool profiling_enabled(); |
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1796 static void assert_profiling_enabled() { |
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1797 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1798 } |
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1799 |
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1800 public: |
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1801 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1802 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1803 // Some compilers (VC++) don't want this passed in member initialization list |
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1804 _parameters.set_profile_data(this); |
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1805 } |
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1806 |
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1807 static int compute_cell_count(Method* m); |
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1808 |
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1809 virtual bool is_ParametersTypeData() const { return true; } |
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1810 |
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1811 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1812 |
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1813 int number_of_parameters() const { |
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1814 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1815 } |
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1816 |
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1817 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1818 |
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1819 uint stack_slot(int i) const { |
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1820 return _parameters.stack_slot(i); |
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1821 } |
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1822 |
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1823 void set_type(int i, Klass* k) { |
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1824 intptr_t current = _parameters.type(i); |
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1825 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1826 } |
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1827 |
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1828 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1829 _parameters.clean_weak_klass_links(is_alive_closure); |
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1830 } |
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1831 |
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1832 #ifndef PRODUCT |
14909 | 1833 virtual void print_data_on(outputStream* st) const; |
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1834 #endif |
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1835 |
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1836 static ByteSize stack_slot_offset(int i) { |
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1837 return cell_offset(stack_slot_local_offset(i)); |
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1838 } |
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1839 |
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1840 static ByteSize type_offset(int i) { |
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1841 return cell_offset(type_local_offset(i)); |
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1842 } |
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1843 }; |
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1844 |
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1845 // MethodData* |
0 | 1846 // |
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1847 // A MethodData* holds information which has been collected about |
0 | 1848 // a method. Its layout looks like this: |
1849 // | |
1850 // ----------------------------- | |
1851 // | header | | |
1852 // | klass | | |
1853 // ----------------------------- | |
1854 // | method | | |
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1855 // | size of the MethodData* | |
0 | 1856 // ----------------------------- |
1857 // | Data entries... | | |
1858 // | (variable size) | | |
1859 // | | | |
1860 // . . | |
1861 // . . | |
1862 // . . | |
1863 // | | | |
1864 // ----------------------------- | |
1865 // | |
1866 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1867 // DataLayout in the array corresponds to a specific bytecode in the | |
1868 // method. The entries in the array are sorted by the corresponding | |
1869 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1870 // which point to the underlying blocks of DataLayout structures. | |
1871 // | |
1872 // During interpretation, if profiling in enabled, the interpreter | |
1873 // maintains a method data pointer (mdp), which points at the entry | |
1874 // in the array corresponding to the current bci. In the course of | |
1875 // intepretation, when a bytecode is encountered that has profile data | |
1876 // associated with it, the entry pointed to by mdp is updated, then the | |
1877 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1878 // is NULL to begin with, the interpreter assumes that the current method | |
1879 // is not (yet) being profiled. | |
1880 // | |
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1881 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1882 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1883 // from the base of the data entry array. A "displacement" is the byte offset | |
1884 // in certain ProfileData objects that indicate the amount the mdp must be | |
1885 // adjusted in the event of a change in control flow. | |
1886 // | |
1887 | |
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1888 class MethodData : public Metadata { |
0 | 1889 friend class VMStructs; |
1890 private: | |
1891 friend class ProfileData; | |
1892 | |
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1893 // Back pointer to the Method* |
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1894 Method* _method; |
0 | 1895 |
1896 // Size of this oop in bytes | |
1897 int _size; | |
1898 | |
1899 // Cached hint for bci_to_dp and bci_to_data | |
1900 int _hint_di; | |
1901 | |
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1902 MethodData(methodHandle method, int size, TRAPS); |
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1903 public: |
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1904 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1905 MethodData() {}; // For ciMethodData |
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1906 |
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1907 bool is_methodData() const volatile { return true; } |
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1908 void initialize(bool for_reprofile = false); |
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1909 |
0 | 1910 // Whole-method sticky bits and flags |
1911 enum { | |
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1912 #ifdef GRAAL |
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1913 _trap_hist_limit = 18, // decoupled from Deoptimization::Reason_LIMIT |
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1914 #else |
3345 | 1915 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
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1916 #endif |
0 | 1917 _trap_hist_mask = max_jubyte, |
1918 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1919 }; // Public flag values | |
1920 private: | |
1921 uint _nof_decompiles; // count of all nmethod removals | |
1922 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1923 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1924 union { | |
1925 intptr_t _align; | |
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1926 #ifdef GRAAL |
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1927 u1 _array[2*_trap_hist_limit]; |
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1928 #else |
0 | 1929 u1 _array[_trap_hist_limit]; |
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1930 #endif |
0 | 1931 } _trap_hist; |
1932 | |
1933 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1934 intx _eflags; // flags on escape information | |
1935 intx _arg_local; // bit set of non-escaping arguments | |
1936 intx _arg_stack; // bit set of stack-allocatable arguments | |
1937 intx _arg_returned; // bit set of returned arguments | |
1938 | |
1783 | 1939 int _creation_mileage; // method mileage at MDO creation |
1940 | |
1941 // How many invocations has this MDO seen? | |
1942 // These counters are used to determine the exact age of MDO. | |
1943 // We need those because in tiered a method can be concurrently | |
1944 // executed at different levels. | |
1945 InvocationCounter _invocation_counter; | |
1946 // Same for backedges. | |
1947 InvocationCounter _backedge_counter; | |
2252 | 1948 // Counter values at the time profiling started. |
1949 int _invocation_counter_start; | |
1950 int _backedge_counter_start; | |
1783 | 1951 // Number of loops and blocks is computed when compiling the first |
1952 // time with C1. It is used to determine if method is trivial. | |
1953 short _num_loops; | |
1954 short _num_blocks; | |
1955 // Highest compile level this method has ever seen. | |
1956 u1 _highest_comp_level; | |
1957 // Same for OSR level | |
1958 u1 _highest_osr_comp_level; | |
1959 // Does this method contain anything worth profiling? | |
1960 bool _would_profile; | |
0 | 1961 |
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1962 #ifdef GRAAL |
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1963 // Support for HotSpotMethodData.setCompiledGraphSize(int) |
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1964 int _graal_node_count; |
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1965 #endif |
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1966 |
0 | 1967 // Size of _data array in bytes. (Excludes header and extra_data fields.) |
1968 int _data_size; | |
1969 | |
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1970 // data index for the area dedicated to parameters. -1 if no |
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1971 // parameter profiling. |
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1972 int _parameters_type_data_di; |
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1973 |
0 | 1974 // Beginning of the data entries |
1975 intptr_t _data[1]; | |
1976 | |
1977 // Helper for size computation | |
1978 static int compute_data_size(BytecodeStream* stream); | |
1979 static int bytecode_cell_count(Bytecodes::Code code); | |
1980 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1981 | |
1982 // Helper for initialization | |
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1983 DataLayout* data_layout_at(int data_index) const { |
0 | 1984 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1985 return (DataLayout*) (((address)_data) + data_index); | |
1986 } | |
1987 | |
1988 // Initialize an individual data segment. Returns the size of | |
1989 // the segment in bytes. | |
1990 int initialize_data(BytecodeStream* stream, int data_index); | |
1991 | |
1992 // Helper for data_at | |
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1993 DataLayout* limit_data_position() const { |
0 | 1994 return (DataLayout*)((address)data_base() + _data_size); |
1995 } | |
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1996 bool out_of_bounds(int data_index) const { |
0 | 1997 return data_index >= data_size(); |
1998 } | |
1999 | |
2000 // Give each of the data entries a chance to perform specific | |
2001 // data initialization. | |
2002 void post_initialize(BytecodeStream* stream); | |
2003 | |
2004 // hint accessors | |
2005 int hint_di() const { return _hint_di; } | |
2006 void set_hint_di(int di) { | |
2007 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
2008 _hint_di = di; | |
2009 } | |
2010 ProfileData* data_before(int bci) { | |
2011 // avoid SEGV on this edge case | |
2012 if (data_size() == 0) | |
2013 return NULL; | |
2014 int hint = hint_di(); | |
2015 if (data_layout_at(hint)->bci() <= bci) | |
2016 return data_at(hint); | |
2017 return first_data(); | |
2018 } | |
2019 | |
2020 // What is the index of the first data entry? | |
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2021 int first_di() const { return 0; } |
0 | 2022 |
2023 // Find or create an extra ProfileData: | |
14909 | 2024 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); |
0 | 2025 |
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2026 // return the argument info cell |
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2027 ArgInfoData *arg_info(); |
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2028 |
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2029 enum { |
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2030 no_type_profile = 0, |
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2031 type_profile_jsr292 = 1, |
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2032 type_profile_all = 2 |
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2033 }; |
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2034 |
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2035 static bool profile_jsr292(methodHandle m, int bci); |
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2036 static int profile_arguments_flag(); |
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2037 static bool profile_arguments_jsr292_only(); |
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2038 static bool profile_all_arguments(); |
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2039 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2040 static int profile_return_flag(); |
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2041 static bool profile_all_return(); |
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2042 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2043 static int profile_parameters_flag(); |
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2044 static bool profile_parameters_jsr292_only(); |
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2045 static bool profile_all_parameters(); |
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2046 |
0 | 2047 public: |
2048 static int header_size() { | |
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2049 return sizeof(MethodData)/wordSize; |
0 | 2050 } |
2051 | |
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2052 // Compute the size of a MethodData* before it is created. |
0 | 2053 static int compute_allocation_size_in_bytes(methodHandle method); |
2054 static int compute_allocation_size_in_words(methodHandle method); | |
14909 | 2055 static int compute_extra_data_count(int data_size, int empty_bc_count); |
0 | 2056 |
2057 // Determine if a given bytecode can have profile information. | |
2058 static bool bytecode_has_profile(Bytecodes::Code code) { | |
2059 return bytecode_cell_count(code) != no_profile_data; | |
2060 } | |
2061 | |
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2062 // reset into original state |
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2063 void init(); |
0 | 2064 |
2065 // My size | |
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2066 int size_in_bytes() const { return _size; } |
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2067 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 2068 #if INCLUDE_SERVICES |
2069 void collect_statistics(KlassSizeStats *sz) const; | |
2070 #endif | |
0 | 2071 |
2072 int creation_mileage() const { return _creation_mileage; } | |
2073 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 2074 |
2075 int invocation_count() { | |
2076 if (invocation_counter()->carry()) { | |
2077 return InvocationCounter::count_limit; | |
2078 } | |
2079 return invocation_counter()->count(); | |
2080 } | |
2081 int backedge_count() { | |
2082 if (backedge_counter()->carry()) { | |
2083 return InvocationCounter::count_limit; | |
2084 } | |
2085 return backedge_counter()->count(); | |
2086 } | |
2087 | |
2252 | 2088 int invocation_count_start() { |
2089 if (invocation_counter()->carry()) { | |
2090 return 0; | |
2091 } | |
2092 return _invocation_counter_start; | |
2093 } | |
2094 | |
2095 int backedge_count_start() { | |
2096 if (backedge_counter()->carry()) { | |
2097 return 0; | |
2098 } | |
2099 return _backedge_counter_start; | |
2100 } | |
2101 | |
2102 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
2103 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
2104 | |
2105 void reset_start_counters() { | |
2106 _invocation_counter_start = invocation_count(); | |
2107 _backedge_counter_start = backedge_count(); | |
2108 } | |
2109 | |
1783 | 2110 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
2111 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
2112 | |
2113 void set_would_profile(bool p) { _would_profile = p; } | |
2114 bool would_profile() const { return _would_profile; } | |
2115 | |
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2116 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 2117 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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2118 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2119 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2120 | |
2121 int num_loops() const { return _num_loops; } | |
2122 void set_num_loops(int n) { _num_loops = n; } | |
2123 int num_blocks() const { return _num_blocks; } | |
2124 void set_num_blocks(int n) { _num_blocks = n; } | |
2125 | |
0 | 2126 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2127 static int mileage_of(Method* m); |
0 | 2128 |
2129 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2130 enum EscapeFlag { | |
2131 estimated = 1 << 0, | |
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2132 return_local = 1 << 1, |
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2133 return_allocated = 1 << 2, |
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2134 allocated_escapes = 1 << 3, |
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2135 unknown_modified = 1 << 4 |
0 | 2136 }; |
2137 | |
2138 intx eflags() { return _eflags; } | |
2139 intx arg_local() { return _arg_local; } | |
2140 intx arg_stack() { return _arg_stack; } | |
2141 intx arg_returned() { return _arg_returned; } | |
45
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2142 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2143 assert(aid != NULL, "arg_info must be not null"); |
45
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2144 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2145 return aid->arg_modified(a); } |
0 | 2146 |
2147 void set_eflags(intx v) { _eflags = v; } | |
2148 void set_arg_local(intx v) { _arg_local = v; } | |
2149 void set_arg_stack(intx v) { _arg_stack = v; } | |
2150 void set_arg_returned(intx v) { _arg_returned = v; } | |
45
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2151 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2152 assert(aid != NULL, "arg_info must be not null"); |
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2153 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2154 aid->set_arg_modified(a, v); } |
0 | 2155 |
2156 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2157 | |
2158 // Location and size of data area | |
2159 address data_base() const { | |
2160 return (address) _data; | |
2161 } | |
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2162 int data_size() const { |
0 | 2163 return _data_size; |
2164 } | |
2165 | |
2166 // Accessors | |
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2167 Method* method() const { return _method; } |
0 | 2168 |
2169 // Get the data at an arbitrary (sort of) data index. | |
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2170 ProfileData* data_at(int data_index) const; |
0 | 2171 |
2172 // Walk through the data in order. | |
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2173 ProfileData* first_data() const { return data_at(first_di()); } |
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2174 ProfileData* next_data(ProfileData* current) const; |
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2175 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2176 |
2177 // Convert a dp (data pointer) to a di (data index). | |
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2178 int dp_to_di(address dp) const { |
0 | 2179 return dp - ((address)_data); |
2180 } | |
2181 | |
2182 address di_to_dp(int di) { | |
2183 return (address)data_layout_at(di); | |
2184 } | |
2185 | |
2186 // bci to di/dp conversion. | |
2187 address bci_to_dp(int bci); | |
2188 int bci_to_di(int bci) { | |
2189 return dp_to_di(bci_to_dp(bci)); | |
2190 } | |
2191 | |
2192 // Get the data at an arbitrary bci, or NULL if there is none. | |
2193 ProfileData* bci_to_data(int bci); | |
2194 | |
2195 // Same, but try to create an extra_data record if one is needed: | |
14909 | 2196 ProfileData* allocate_bci_to_data(int bci) { |
2197 ProfileData* data = bci_to_data(bci); | |
2198 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
0 | 2199 } |
2200 | |
2201 // Add a handful of extra data records, for trap tracking. | |
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2202 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2203 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2204 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2205 - (address)extra_data_base(); } |
14909 | 2206 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } |
0 | 2207 |
2208 // Return (uint)-1 for overflow. | |
2209 uint trap_count(int reason) const { | |
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2210 assert((uint)reason < GRAAL_ONLY(2*) _trap_hist_limit, "oob"); |
0 | 2211 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; |
2212 } | |
2213 // For loops: | |
2214 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2215 static uint trap_count_limit() { return _trap_hist_mask; } | |
2216 uint inc_trap_count(int reason) { | |
2217 // Count another trap, anywhere in this method. | |
2218 assert(reason >= 0, "must be single trap"); | |
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2219 assert((uint)reason < GRAAL_ONLY(2*) _trap_hist_limit, "oob"); |
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2220 uint cnt1 = 1 + _trap_hist._array[reason]; |
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2221 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... |
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2222 _trap_hist._array[reason] = cnt1; |
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2223 return cnt1; |
0 | 2224 } else { |
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2225 return _trap_hist_mask + (++_nof_overflow_traps); |
0 | 2226 } |
2227 } | |
2228 | |
2229 uint overflow_trap_count() const { | |
2230 return _nof_overflow_traps; | |
2231 } | |
2232 uint overflow_recompile_count() const { | |
2233 return _nof_overflow_recompiles; | |
2234 } | |
2235 void inc_overflow_recompile_count() { | |
2236 _nof_overflow_recompiles += 1; | |
2237 } | |
2238 uint decompile_count() const { | |
2239 return _nof_decompiles; | |
2240 } | |
2241 void inc_decompile_count() { | |
2242 _nof_decompiles += 1; | |
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2243 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2244 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2245 } |
0 | 2246 } |
2247 | |
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2248 // Return pointer to area dedicated to parameters in MDO |
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2249 ParametersTypeData* parameters_type_data() const { |
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2250 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2251 } |
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2252 |
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2253 int parameters_type_data_di() const { |
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2254 assert(_parameters_type_data_di != -1, "no args type data"); |
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2255 return _parameters_type_data_di; |
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2256 } |
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2257 |
0 | 2258 // Support for code generation |
2259 static ByteSize data_offset() { | |
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2260 return byte_offset_of(MethodData, _data[0]); |
0 | 2261 } |
2262 | |
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2263 static ByteSize trap_history_offset() { |
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2264 return byte_offset_of(MethodData, _trap_hist._array); |
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2265 } |
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2266 |
1783 | 2267 static ByteSize invocation_counter_offset() { |
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2268 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2269 } |
2270 static ByteSize backedge_counter_offset() { | |
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2271 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2272 } |
2273 | |
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2274 static ByteSize parameters_type_data_di_offset() { |
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2275 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2276 } |
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2277 |
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2278 // Deallocation support - no pointer fields to deallocate |
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2279 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2280 |
0 | 2281 // GC support |
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2282 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2283 |
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2284 // Printing |
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2285 #ifndef PRODUCT |
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2286 void print_on (outputStream* st) const; |
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2287 #endif |
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2288 void print_value_on(outputStream* st) const; |
0 | 2289 |
2290 #ifndef PRODUCT | |
2291 // printing support for method data | |
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2292 void print_data_on(outputStream* st) const; |
0 | 2293 #endif |
2294 | |
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2295 const char* internal_name() const { return "{method data}"; } |
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2296 |
0 | 2297 // verification |
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2298 void verify_on(outputStream* st); |
0 | 2299 void verify_data_on(outputStream* st); |
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2300 |
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2301 static bool profile_parameters_for_method(methodHandle m); |
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2302 static bool profile_arguments(); |
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2303 static bool profile_return(); |
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2304 static bool profile_parameters(); |
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2305 static bool profile_return_jsr292_only(); |
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2306 |
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2307 void clean_weak_method_links(); |
0 | 2308 }; |
1972 | 2309 |
2310 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |