Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.hpp @ 14694:58cf34613a72
8036976: PPC64: implement the template interpreter
Reviewed-by: kvn, coleenp
Contributed-by: axel.siebenborn@sap.com, martin.doerr@sap.com
author | goetz |
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date | Mon, 10 Mar 2014 12:58:02 +0100 |
parents | 53ed0f89f44e |
children | b51e29501f30 |
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, |
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123 parameters_type_data_tag, |
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124 speculative_trap_data_tag |
0 | 125 }; |
126 | |
127 enum { | |
128 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
129 // The trap state breaks down further as [recompile:1 | reason:3]. | |
130 // This further breakdown is defined in deoptimization.cpp. | |
131 // See Deoptimization::trap_state_reason for an assert that | |
132 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
133 // | |
134 // The trap_state is collected only if ProfileTraps is true. | |
135 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
136 trap_shift = BitsPerByte - trap_bits, | |
137 trap_mask = right_n_bits(trap_bits), | |
138 trap_mask_in_place = (trap_mask << trap_shift), | |
139 flag_limit = trap_shift, | |
140 flag_mask = right_n_bits(flag_limit), | |
141 first_flag = 0 | |
142 }; | |
143 | |
144 // Size computation | |
145 static int header_size_in_bytes() { | |
146 return cell_size; | |
147 } | |
148 static int header_size_in_cells() { | |
149 return 1; | |
150 } | |
151 | |
152 static int compute_size_in_bytes(int cell_count) { | |
153 return header_size_in_bytes() + cell_count * cell_size; | |
154 } | |
155 | |
156 // Initialization | |
157 void initialize(u1 tag, u2 bci, int cell_count); | |
158 | |
159 // Accessors | |
160 u1 tag() { | |
161 return _header._struct._tag; | |
162 } | |
163 | |
164 // Return a few bits of trap state. Range is [0..trap_mask]. | |
165 // The state tells if traps with zero, one, or many reasons have occurred. | |
166 // It also tells whether zero or many recompilations have occurred. | |
167 // The associated trap histogram in the MDO itself tells whether | |
168 // traps are common or not. If a BCI shows that a trap X has | |
169 // occurred, and the MDO shows N occurrences of X, we make the | |
170 // simplifying assumption that all N occurrences can be blamed | |
171 // on that BCI. | |
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172 int trap_state() const { |
0 | 173 return ((_header._struct._flags >> trap_shift) & trap_mask); |
174 } | |
175 | |
176 void set_trap_state(int new_state) { | |
177 assert(ProfileTraps, "used only under +ProfileTraps"); | |
178 uint old_flags = (_header._struct._flags & flag_mask); | |
179 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
180 } | |
181 | |
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182 u1 flags() const { |
0 | 183 return _header._struct._flags; |
184 } | |
185 | |
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186 u2 bci() const { |
0 | 187 return _header._struct._bci; |
188 } | |
189 | |
190 void set_header(intptr_t value) { | |
191 _header._bits = value; | |
192 } | |
193 intptr_t header() { | |
194 return _header._bits; | |
195 } | |
196 void set_cell_at(int index, intptr_t value) { | |
197 _cells[index] = value; | |
198 } | |
199 void release_set_cell_at(int index, intptr_t value) { | |
200 OrderAccess::release_store_ptr(&_cells[index], value); | |
201 } | |
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202 intptr_t cell_at(int index) const { |
0 | 203 return _cells[index]; |
204 } | |
205 | |
206 void set_flag_at(int flag_number) { | |
207 assert(flag_number < flag_limit, "oob"); | |
208 _header._struct._flags |= (0x1 << flag_number); | |
209 } | |
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210 bool flag_at(int flag_number) const { |
0 | 211 assert(flag_number < flag_limit, "oob"); |
212 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
213 } | |
214 | |
215 // Low-level support for code generation. | |
216 static ByteSize header_offset() { | |
217 return byte_offset_of(DataLayout, _header); | |
218 } | |
219 static ByteSize tag_offset() { | |
220 return byte_offset_of(DataLayout, _header._struct._tag); | |
221 } | |
222 static ByteSize flags_offset() { | |
223 return byte_offset_of(DataLayout, _header._struct._flags); | |
224 } | |
225 static ByteSize bci_offset() { | |
226 return byte_offset_of(DataLayout, _header._struct._bci); | |
227 } | |
228 static ByteSize cell_offset(int index) { | |
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229 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 230 } |
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231 #ifdef CC_INTERP |
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232 static int cell_offset_in_bytes(int index) { |
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233 return (int)offset_of(DataLayout, _cells[index]); |
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234 } |
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235 #endif // CC_INTERP |
0 | 236 // Return a value which, when or-ed as a byte into _flags, sets the flag. |
237 static int flag_number_to_byte_constant(int flag_number) { | |
238 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
239 DataLayout temp; temp.set_header(0); | |
240 temp.set_flag_at(flag_number); | |
241 return temp._header._struct._flags; | |
242 } | |
243 // Return a value which, when or-ed as a word into _header, sets the flag. | |
244 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
245 DataLayout temp; temp.set_header(0); | |
246 temp._header._struct._flags = byte_constant; | |
247 return temp._header._bits; | |
248 } | |
941 | 249 |
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250 ProfileData* data_in(); |
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251 |
941 | 252 // GC support |
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253 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 254 }; |
255 | |
256 | |
257 // ProfileData class hierarchy | |
258 class ProfileData; | |
259 class BitData; | |
260 class CounterData; | |
261 class ReceiverTypeData; | |
262 class VirtualCallData; | |
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263 class VirtualCallTypeData; |
0 | 264 class RetData; |
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265 class CallTypeData; |
0 | 266 class JumpData; |
267 class BranchData; | |
268 class ArrayData; | |
269 class MultiBranchData; | |
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270 class ArgInfoData; |
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271 class ParametersTypeData; |
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272 class SpeculativeTrapData; |
0 | 273 |
274 // ProfileData | |
275 // | |
276 // A ProfileData object is created to refer to a section of profiling | |
277 // data in a structured way. | |
278 class ProfileData : public ResourceObj { | |
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279 friend class TypeEntries; |
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280 friend class ReturnTypeEntry; |
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281 friend class TypeStackSlotEntries; |
0 | 282 private: |
283 #ifndef PRODUCT | |
284 enum { | |
285 tab_width_one = 16, | |
286 tab_width_two = 36 | |
287 }; | |
288 #endif // !PRODUCT | |
289 | |
290 // This is a pointer to a section of profiling data. | |
291 DataLayout* _data; | |
292 | |
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293 char* print_data_on_helper(const MethodData* md) const; |
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294 |
0 | 295 protected: |
296 DataLayout* data() { return _data; } | |
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297 const DataLayout* data() const { return _data; } |
0 | 298 |
299 enum { | |
300 cell_size = DataLayout::cell_size | |
301 }; | |
302 | |
303 public: | |
304 // How many cells are in this? | |
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305 virtual int cell_count() const { |
0 | 306 ShouldNotReachHere(); |
307 return -1; | |
308 } | |
309 | |
310 // Return the size of this data. | |
311 int size_in_bytes() { | |
312 return DataLayout::compute_size_in_bytes(cell_count()); | |
313 } | |
314 | |
315 protected: | |
316 // Low-level accessors for underlying data | |
317 void set_intptr_at(int index, intptr_t value) { | |
318 assert(0 <= index && index < cell_count(), "oob"); | |
319 data()->set_cell_at(index, value); | |
320 } | |
321 void release_set_intptr_at(int index, intptr_t value) { | |
322 assert(0 <= index && index < cell_count(), "oob"); | |
323 data()->release_set_cell_at(index, value); | |
324 } | |
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325 intptr_t intptr_at(int index) const { |
0 | 326 assert(0 <= index && index < cell_count(), "oob"); |
327 return data()->cell_at(index); | |
328 } | |
329 void set_uint_at(int index, uint value) { | |
330 set_intptr_at(index, (intptr_t) value); | |
331 } | |
332 void release_set_uint_at(int index, uint value) { | |
333 release_set_intptr_at(index, (intptr_t) value); | |
334 } | |
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335 uint uint_at(int index) const { |
0 | 336 return (uint)intptr_at(index); |
337 } | |
338 void set_int_at(int index, int value) { | |
339 set_intptr_at(index, (intptr_t) value); | |
340 } | |
341 void release_set_int_at(int index, int value) { | |
342 release_set_intptr_at(index, (intptr_t) value); | |
343 } | |
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344 int int_at(int index) const { |
0 | 345 return (int)intptr_at(index); |
346 } | |
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347 int int_at_unchecked(int index) const { |
0 | 348 return (int)data()->cell_at(index); |
349 } | |
350 void set_oop_at(int index, oop value) { | |
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351 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 352 } |
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353 oop oop_at(int index) const { |
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354 return cast_to_oop(intptr_at(index)); |
0 | 355 } |
356 | |
357 void set_flag_at(int flag_number) { | |
358 data()->set_flag_at(flag_number); | |
359 } | |
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360 bool flag_at(int flag_number) const { |
0 | 361 return data()->flag_at(flag_number); |
362 } | |
363 | |
364 // two convenient imports for use by subclasses: | |
365 static ByteSize cell_offset(int index) { | |
366 return DataLayout::cell_offset(index); | |
367 } | |
368 static int flag_number_to_byte_constant(int flag_number) { | |
369 return DataLayout::flag_number_to_byte_constant(flag_number); | |
370 } | |
371 | |
372 ProfileData(DataLayout* data) { | |
373 _data = data; | |
374 } | |
375 | |
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376 #ifdef CC_INTERP |
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377 // Static low level accessors for DataLayout with ProfileData's semantics. |
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378 |
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379 static int cell_offset_in_bytes(int index) { |
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380 return DataLayout::cell_offset_in_bytes(index); |
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381 } |
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382 |
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383 static void increment_uint_at_no_overflow(DataLayout* layout, int index, |
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384 int inc = DataLayout::counter_increment) { |
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385 uint count = ((uint)layout->cell_at(index)) + inc; |
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386 if (count == 0) return; |
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387 layout->set_cell_at(index, (intptr_t) count); |
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388 } |
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389 |
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390 static int int_at(DataLayout* layout, int index) { |
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391 return (int)layout->cell_at(index); |
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392 } |
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393 |
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394 static int uint_at(DataLayout* layout, int index) { |
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395 return (uint)layout->cell_at(index); |
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396 } |
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397 |
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398 static oop oop_at(DataLayout* layout, int index) { |
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399 return cast_to_oop(layout->cell_at(index)); |
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400 } |
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401 |
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402 static void set_intptr_at(DataLayout* layout, int index, intptr_t value) { |
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403 layout->set_cell_at(index, (intptr_t) value); |
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404 } |
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405 |
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406 static void set_flag_at(DataLayout* layout, int flag_number) { |
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407 layout->set_flag_at(flag_number); |
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408 } |
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409 #endif // CC_INTERP |
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410 |
0 | 411 public: |
412 // Constructor for invalid ProfileData. | |
413 ProfileData(); | |
414 | |
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415 u2 bci() const { |
0 | 416 return data()->bci(); |
417 } | |
418 | |
419 address dp() { | |
420 return (address)_data; | |
421 } | |
422 | |
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423 int trap_state() const { |
0 | 424 return data()->trap_state(); |
425 } | |
426 void set_trap_state(int new_state) { | |
427 data()->set_trap_state(new_state); | |
428 } | |
429 | |
430 // Type checking | |
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431 virtual bool is_BitData() const { return false; } |
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432 virtual bool is_CounterData() const { return false; } |
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433 virtual bool is_JumpData() const { return false; } |
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434 virtual bool is_ReceiverTypeData()const { return false; } |
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435 virtual bool is_VirtualCallData() const { return false; } |
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436 virtual bool is_RetData() const { return false; } |
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437 virtual bool is_BranchData() const { return false; } |
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438 virtual bool is_ArrayData() const { return false; } |
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439 virtual bool is_MultiBranchData() const { return false; } |
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440 virtual bool is_ArgInfoData() const { return false; } |
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441 virtual bool is_CallTypeData() const { return false; } |
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442 virtual bool is_VirtualCallTypeData()const { return false; } |
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443 virtual bool is_ParametersTypeData() const { return false; } |
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444 virtual bool is_SpeculativeTrapData()const { return false; } |
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445 |
0 | 446 |
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447 BitData* as_BitData() const { |
0 | 448 assert(is_BitData(), "wrong type"); |
449 return is_BitData() ? (BitData*) this : NULL; | |
450 } | |
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451 CounterData* as_CounterData() const { |
0 | 452 assert(is_CounterData(), "wrong type"); |
453 return is_CounterData() ? (CounterData*) this : NULL; | |
454 } | |
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455 JumpData* as_JumpData() const { |
0 | 456 assert(is_JumpData(), "wrong type"); |
457 return is_JumpData() ? (JumpData*) this : NULL; | |
458 } | |
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459 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 460 assert(is_ReceiverTypeData(), "wrong type"); |
461 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
462 } | |
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463 VirtualCallData* as_VirtualCallData() const { |
0 | 464 assert(is_VirtualCallData(), "wrong type"); |
465 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
466 } | |
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467 RetData* as_RetData() const { |
0 | 468 assert(is_RetData(), "wrong type"); |
469 return is_RetData() ? (RetData*) this : NULL; | |
470 } | |
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471 BranchData* as_BranchData() const { |
0 | 472 assert(is_BranchData(), "wrong type"); |
473 return is_BranchData() ? (BranchData*) this : NULL; | |
474 } | |
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475 ArrayData* as_ArrayData() const { |
0 | 476 assert(is_ArrayData(), "wrong type"); |
477 return is_ArrayData() ? (ArrayData*) this : NULL; | |
478 } | |
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479 MultiBranchData* as_MultiBranchData() const { |
0 | 480 assert(is_MultiBranchData(), "wrong type"); |
481 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
482 } | |
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483 ArgInfoData* as_ArgInfoData() const { |
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484 assert(is_ArgInfoData(), "wrong type"); |
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485 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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486 } |
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487 CallTypeData* as_CallTypeData() const { |
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488 assert(is_CallTypeData(), "wrong type"); |
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489 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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490 } |
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491 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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492 assert(is_VirtualCallTypeData(), "wrong type"); |
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493 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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494 } |
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495 ParametersTypeData* as_ParametersTypeData() const { |
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496 assert(is_ParametersTypeData(), "wrong type"); |
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497 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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498 } |
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499 SpeculativeTrapData* as_SpeculativeTrapData() const { |
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500 assert(is_SpeculativeTrapData(), "wrong type"); |
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501 return is_SpeculativeTrapData() ? (SpeculativeTrapData*)this : NULL; |
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502 } |
0 | 503 |
504 | |
505 // Subclass specific initialization | |
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506 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 507 |
508 // GC support | |
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509 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 510 |
511 // CI translation: ProfileData can represent both MethodDataOop data | |
512 // as well as CIMethodData data. This function is provided for translating | |
513 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
514 // most ProfileData don't require any translation, so we provide the null | |
515 // translation here, and the required translators are in the ci subclasses. | |
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516 virtual void translate_from(const ProfileData* data) {} |
0 | 517 |
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518 virtual void print_data_on(outputStream* st, const char* extra = NULL) const { |
0 | 519 ShouldNotReachHere(); |
520 } | |
521 | |
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522 void print_data_on(outputStream* st, const MethodData* md) const; |
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523 |
0 | 524 #ifndef PRODUCT |
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525 void print_shared(outputStream* st, const char* name, const char* extra) const; |
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526 void tab(outputStream* st, bool first = false) const; |
0 | 527 #endif |
528 }; | |
529 | |
530 // BitData | |
531 // | |
532 // A BitData holds a flag or two in its header. | |
533 class BitData : public ProfileData { | |
534 protected: | |
535 enum { | |
536 // null_seen: | |
537 // saw a null operand (cast/aastore/instanceof) | |
538 null_seen_flag = DataLayout::first_flag + 0 | |
539 }; | |
540 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
541 public: | |
542 BitData(DataLayout* layout) : ProfileData(layout) { | |
543 } | |
544 | |
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545 virtual bool is_BitData() const { return true; } |
0 | 546 |
547 static int static_cell_count() { | |
548 return bit_cell_count; | |
549 } | |
550 | |
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551 virtual int cell_count() const { |
0 | 552 return static_cell_count(); |
553 } | |
554 | |
555 // Accessor | |
556 | |
557 // The null_seen flag bit is specially known to the interpreter. | |
558 // Consulting it allows the compiler to avoid setting up null_check traps. | |
559 bool null_seen() { return flag_at(null_seen_flag); } | |
560 void set_null_seen() { set_flag_at(null_seen_flag); } | |
561 | |
562 | |
563 // Code generation support | |
564 static int null_seen_byte_constant() { | |
565 return flag_number_to_byte_constant(null_seen_flag); | |
566 } | |
567 | |
568 static ByteSize bit_data_size() { | |
569 return cell_offset(bit_cell_count); | |
570 } | |
571 | |
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572 #ifdef CC_INTERP |
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573 static int bit_data_size_in_bytes() { |
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574 return cell_offset_in_bytes(bit_cell_count); |
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575 } |
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576 |
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577 static void set_null_seen(DataLayout* layout) { |
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578 set_flag_at(layout, null_seen_flag); |
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579 } |
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580 |
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581 static DataLayout* advance(DataLayout* layout) { |
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582 return (DataLayout*) (((address)layout) + (ssize_t)BitData::bit_data_size_in_bytes()); |
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583 } |
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584 #endif // CC_INTERP |
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585 |
0 | 586 #ifndef PRODUCT |
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587 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 588 #endif |
589 }; | |
590 | |
591 // CounterData | |
592 // | |
593 // A CounterData corresponds to a simple counter. | |
594 class CounterData : public BitData { | |
595 protected: | |
596 enum { | |
597 count_off, | |
598 counter_cell_count | |
599 }; | |
600 public: | |
601 CounterData(DataLayout* layout) : BitData(layout) {} | |
602 | |
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603 virtual bool is_CounterData() const { return true; } |
0 | 604 |
605 static int static_cell_count() { | |
606 return counter_cell_count; | |
607 } | |
608 | |
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609 virtual int cell_count() const { |
0 | 610 return static_cell_count(); |
611 } | |
612 | |
613 // Direct accessor | |
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614 uint count() const { |
0 | 615 return uint_at(count_off); |
616 } | |
617 | |
618 // Code generation support | |
619 static ByteSize count_offset() { | |
620 return cell_offset(count_off); | |
621 } | |
622 static ByteSize counter_data_size() { | |
623 return cell_offset(counter_cell_count); | |
624 } | |
625 | |
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626 void set_count(uint count) { |
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627 set_uint_at(count_off, count); |
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628 } |
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629 |
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630 #ifdef CC_INTERP |
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631 static int counter_data_size_in_bytes() { |
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632 return cell_offset_in_bytes(counter_cell_count); |
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633 } |
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634 |
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635 static void increment_count_no_overflow(DataLayout* layout) { |
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636 increment_uint_at_no_overflow(layout, count_off); |
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637 } |
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638 |
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639 // Support counter decrementation at checkcast / subtype check failed. |
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640 static void decrement_count(DataLayout* layout) { |
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641 increment_uint_at_no_overflow(layout, count_off, -1); |
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642 } |
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643 |
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644 static DataLayout* advance(DataLayout* layout) { |
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645 return (DataLayout*) (((address)layout) + (ssize_t)CounterData::counter_data_size_in_bytes()); |
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646 } |
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647 #endif // CC_INTERP |
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648 |
0 | 649 #ifndef PRODUCT |
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650 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 651 #endif |
652 }; | |
653 | |
654 // JumpData | |
655 // | |
656 // A JumpData is used to access profiling information for a direct | |
657 // branch. It is a counter, used for counting the number of branches, | |
658 // plus a data displacement, used for realigning the data pointer to | |
659 // the corresponding target bci. | |
660 class JumpData : public ProfileData { | |
661 protected: | |
662 enum { | |
663 taken_off_set, | |
664 displacement_off_set, | |
665 jump_cell_count | |
666 }; | |
667 | |
668 void set_displacement(int displacement) { | |
669 set_int_at(displacement_off_set, displacement); | |
670 } | |
671 | |
672 public: | |
673 JumpData(DataLayout* layout) : ProfileData(layout) { | |
674 assert(layout->tag() == DataLayout::jump_data_tag || | |
675 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
676 } | |
677 | |
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678 virtual bool is_JumpData() const { return true; } |
0 | 679 |
680 static int static_cell_count() { | |
681 return jump_cell_count; | |
682 } | |
683 | |
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684 virtual int cell_count() const { |
0 | 685 return static_cell_count(); |
686 } | |
687 | |
688 // Direct accessor | |
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689 uint taken() const { |
0 | 690 return uint_at(taken_off_set); |
691 } | |
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692 |
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693 void set_taken(uint cnt) { |
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694 set_uint_at(taken_off_set, cnt); |
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695 } |
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696 |
0 | 697 // Saturating counter |
698 uint inc_taken() { | |
699 uint cnt = taken() + 1; | |
700 // Did we wrap? Will compiler screw us?? | |
701 if (cnt == 0) cnt--; | |
702 set_uint_at(taken_off_set, cnt); | |
703 return cnt; | |
704 } | |
705 | |
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706 int displacement() const { |
0 | 707 return int_at(displacement_off_set); |
708 } | |
709 | |
710 // Code generation support | |
711 static ByteSize taken_offset() { | |
712 return cell_offset(taken_off_set); | |
713 } | |
714 | |
715 static ByteSize displacement_offset() { | |
716 return cell_offset(displacement_off_set); | |
717 } | |
718 | |
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719 #ifdef CC_INTERP |
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720 static void increment_taken_count_no_overflow(DataLayout* layout) { |
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721 increment_uint_at_no_overflow(layout, taken_off_set); |
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722 } |
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723 |
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724 static DataLayout* advance_taken(DataLayout* layout) { |
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725 return (DataLayout*) (((address)layout) + (ssize_t)int_at(layout, displacement_off_set)); |
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726 } |
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727 |
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728 static uint taken_count(DataLayout* layout) { |
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729 return (uint) uint_at(layout, taken_off_set); |
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730 } |
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731 #endif // CC_INTERP |
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732 |
0 | 733 // Specific initialization. |
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734 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 735 |
736 #ifndef PRODUCT | |
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737 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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738 #endif |
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739 }; |
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740 |
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741 // Entries in a ProfileData object to record types: it can either be |
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742 // none (no profile), unknown (conflicting profile data) or a klass if |
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743 // a single one is seen. Whether a null reference was seen is also |
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744 // recorded. No counter is associated with the type and a single type |
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745 // is tracked (unlike VirtualCallData). |
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746 class TypeEntries { |
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747 |
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748 public: |
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749 |
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750 // A single cell is used to record information for a type: |
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751 // - the cell is initialized to 0 |
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752 // - when a type is discovered it is stored in the cell |
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753 // - bit zero of the cell is used to record whether a null reference |
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754 // was encountered or not |
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755 // - bit 1 is set to record a conflict in the type information |
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756 |
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757 enum { |
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758 null_seen = 1, |
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759 type_mask = ~null_seen, |
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760 type_unknown = 2, |
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761 status_bits = null_seen | type_unknown, |
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762 type_klass_mask = ~status_bits |
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763 }; |
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764 |
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765 // what to initialize a cell to |
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766 static intptr_t type_none() { |
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767 return 0; |
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768 } |
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769 |
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770 // null seen = bit 0 set? |
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771 static bool was_null_seen(intptr_t v) { |
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772 return (v & null_seen) != 0; |
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773 } |
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774 |
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775 // conflicting type information = bit 1 set? |
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776 static bool is_type_unknown(intptr_t v) { |
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777 return (v & type_unknown) != 0; |
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778 } |
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779 |
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780 // not type information yet = all bits cleared, ignoring bit 0? |
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781 static bool is_type_none(intptr_t v) { |
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782 return (v & type_mask) == 0; |
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783 } |
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784 |
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785 // recorded type: cell without bit 0 and 1 |
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786 static intptr_t klass_part(intptr_t v) { |
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787 intptr_t r = v & type_klass_mask; |
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788 return r; |
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789 } |
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790 |
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791 // type recorded |
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792 static Klass* valid_klass(intptr_t k) { |
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793 if (!is_type_none(k) && |
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794 !is_type_unknown(k)) { |
13080 | 795 Klass* res = (Klass*)klass_part(k); |
796 assert(res != NULL, "invalid"); | |
797 return res; | |
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798 } else { |
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799 return NULL; |
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800 } |
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801 } |
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802 |
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803 static intptr_t with_status(intptr_t k, intptr_t in) { |
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804 return k | (in & status_bits); |
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805 } |
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806 |
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807 static intptr_t with_status(Klass* k, intptr_t in) { |
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808 return with_status((intptr_t)k, in); |
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809 } |
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810 |
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811 #ifndef PRODUCT |
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812 static void print_klass(outputStream* st, intptr_t k); |
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813 #endif |
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814 |
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815 // GC support |
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816 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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817 |
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818 protected: |
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819 // ProfileData object these entries are part of |
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820 ProfileData* _pd; |
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821 // offset within the ProfileData object where the entries start |
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822 const int _base_off; |
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|
823 |
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824 TypeEntries(int base_off) |
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825 : _base_off(base_off), _pd(NULL) {} |
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826 |
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827 void set_intptr_at(int index, intptr_t value) { |
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828 _pd->set_intptr_at(index, value); |
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|
829 } |
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|
830 |
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|
831 intptr_t intptr_at(int index) const { |
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832 return _pd->intptr_at(index); |
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|
833 } |
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834 |
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835 public: |
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|
836 void set_profile_data(ProfileData* pd) { |
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|
837 _pd = pd; |
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|
838 } |
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|
839 }; |
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|
840 |
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841 // Type entries used for arguments passed at a call and parameters on |
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842 // method entry. 2 cells per entry: one for the type encoded as in |
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843 // TypeEntries and one initialized with the stack slot where the |
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844 // profiled object is to be found so that the interpreter can locate |
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845 // it quickly. |
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846 class TypeStackSlotEntries : public TypeEntries { |
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|
847 |
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848 private: |
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|
849 enum { |
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|
850 stack_slot_entry, |
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851 type_entry, |
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852 per_arg_cell_count |
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853 }; |
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|
854 |
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855 // offset of cell for stack slot for entry i within ProfileData object |
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856 int stack_slot_offset(int i) const { |
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857 return _base_off + stack_slot_local_offset(i); |
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858 } |
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|
859 |
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|
860 protected: |
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861 const int _number_of_entries; |
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862 |
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863 // offset of cell for type for entry i within ProfileData object |
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864 int type_offset(int i) const { |
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865 return _base_off + type_local_offset(i); |
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|
866 } |
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|
867 |
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|
868 public: |
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|
869 |
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870 TypeStackSlotEntries(int base_off, int nb_entries) |
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871 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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872 |
12962
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873 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
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874 |
12962
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875 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
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876 |
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877 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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878 static int stack_slot_local_offset(int i) { |
12882
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879 return i * per_arg_cell_count + stack_slot_entry; |
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880 } |
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|
881 |
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882 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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883 static int type_local_offset(int i) { |
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884 return i * per_arg_cell_count + type_entry; |
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885 } |
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|
886 |
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|
887 // stack slot for entry i |
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|
888 uint stack_slot(int i) const { |
12882
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889 assert(i >= 0 && i < _number_of_entries, "oob"); |
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890 return _pd->uint_at(stack_slot_offset(i)); |
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891 } |
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|
892 |
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|
893 // set stack slot for entry i |
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|
894 void set_stack_slot(int i, uint num) { |
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|
895 assert(i >= 0 && i < _number_of_entries, "oob"); |
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896 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
897 } |
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|
898 |
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|
899 // type for entry i |
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|
900 intptr_t type(int i) const { |
12882
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901 assert(i >= 0 && i < _number_of_entries, "oob"); |
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902 return _pd->intptr_at(type_offset(i)); |
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|
903 } |
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|
904 |
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|
905 // set type for entry i |
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|
906 void set_type(int i, intptr_t k) { |
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907 assert(i >= 0 && i < _number_of_entries, "oob"); |
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908 _pd->set_intptr_at(type_offset(i), k); |
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|
909 } |
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|
910 |
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|
911 static ByteSize per_arg_size() { |
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|
912 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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|
913 } |
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|
914 |
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|
915 static int per_arg_count() { |
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|
916 return per_arg_cell_count ; |
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|
917 } |
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|
918 |
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|
919 // GC support |
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920 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
921 |
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|
922 #ifndef PRODUCT |
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923 void print_data_on(outputStream* st) const; |
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924 #endif |
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925 }; |
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|
926 |
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927 // Type entry used for return from a call. A single cell to record the |
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|
928 // type. |
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929 class ReturnTypeEntry : public TypeEntries { |
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|
930 |
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|
931 private: |
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|
932 enum { |
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933 cell_count = 1 |
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|
934 }; |
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|
935 |
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|
936 public: |
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|
937 ReturnTypeEntry(int base_off) |
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|
938 : TypeEntries(base_off) {} |
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|
939 |
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|
940 void post_initialize() { |
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|
941 set_type(type_none()); |
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|
942 } |
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|
943 |
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|
944 intptr_t type() const { |
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945 return _pd->intptr_at(_base_off); |
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|
946 } |
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|
947 |
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|
948 void set_type(intptr_t k) { |
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949 _pd->set_intptr_at(_base_off, k); |
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|
950 } |
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|
951 |
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|
952 static int static_cell_count() { |
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|
953 return cell_count; |
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|
954 } |
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|
955 |
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956 static ByteSize size() { |
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957 return in_ByteSize(cell_count * DataLayout::cell_size); |
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958 } |
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959 |
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960 ByteSize type_offset() { |
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961 return DataLayout::cell_offset(_base_off); |
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962 } |
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963 |
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964 // GC support |
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965 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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966 |
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967 #ifndef PRODUCT |
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968 void print_data_on(outputStream* st) const; |
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969 #endif |
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970 }; |
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971 |
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972 // Entries to collect type information at a call: contains arguments |
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973 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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974 // number of cells. Because the number of cells for the return type is |
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975 // smaller than the number of cells for the type of an arguments, the |
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976 // number of cells is used to tell how many arguments are profiled and |
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977 // whether a return value is profiled. See has_arguments() and |
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978 // has_return(). |
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979 class TypeEntriesAtCall { |
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980 private: |
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981 static int stack_slot_local_offset(int i) { |
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982 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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983 } |
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984 |
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985 static int argument_type_local_offset(int i) { |
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986 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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987 } |
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988 |
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989 public: |
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990 |
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991 static int header_cell_count() { |
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992 return 1; |
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993 } |
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994 |
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995 static int cell_count_local_offset() { |
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996 return 0; |
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997 } |
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998 |
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999 static int compute_cell_count(BytecodeStream* stream); |
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1000 |
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1001 static void initialize(DataLayout* dl, int base, int cell_count) { |
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1002 int off = base + cell_count_local_offset(); |
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1003 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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1004 } |
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1005 |
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1006 static bool arguments_profiling_enabled(); |
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1007 static bool return_profiling_enabled(); |
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1008 |
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1009 // Code generation support |
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1010 static ByteSize cell_count_offset() { |
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1011 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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1012 } |
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1013 |
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1014 static ByteSize args_data_offset() { |
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1015 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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1016 } |
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1017 |
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1018 static ByteSize stack_slot_offset(int i) { |
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1019 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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1020 } |
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1021 |
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1022 static ByteSize argument_type_offset(int i) { |
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1023 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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1024 } |
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1025 }; |
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1026 |
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1027 // CallTypeData |
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1028 // |
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1029 // A CallTypeData is used to access profiling information about a non |
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1030 // virtual call for which we collect type information about arguments |
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1031 // and return value. |
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1032 class CallTypeData : public CounterData { |
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1033 private: |
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1034 // entries for arguments if any |
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1035 TypeStackSlotEntries _args; |
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1036 // entry for return type if any |
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1037 ReturnTypeEntry _ret; |
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1038 |
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1039 int cell_count_global_offset() const { |
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1040 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1041 } |
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1042 |
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1043 // number of cells not counting the header |
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1044 int cell_count_no_header() const { |
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1045 return uint_at(cell_count_global_offset()); |
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1046 } |
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1047 |
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1048 void check_number_of_arguments(int total) { |
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1049 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1050 } |
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1051 |
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1052 public: |
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1053 CallTypeData(DataLayout* layout) : |
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1054 CounterData(layout), |
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1055 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1056 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1057 { |
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1058 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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1059 // Some compilers (VC++) don't want this passed in member initialization list |
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1060 _args.set_profile_data(this); |
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1061 _ret.set_profile_data(this); |
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1062 } |
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1063 |
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1064 const TypeStackSlotEntries* args() const { |
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1065 assert(has_arguments(), "no profiling of arguments"); |
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1066 return &_args; |
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1067 } |
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1068 |
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1069 const ReturnTypeEntry* ret() const { |
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1070 assert(has_return(), "no profiling of return value"); |
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1071 return &_ret; |
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1072 } |
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1073 |
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1074 virtual bool is_CallTypeData() const { return true; } |
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1075 |
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1076 static int static_cell_count() { |
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1077 return -1; |
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1078 } |
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1079 |
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1080 static int compute_cell_count(BytecodeStream* stream) { |
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1081 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1082 } |
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1083 |
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1084 static void initialize(DataLayout* dl, int cell_count) { |
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1085 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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1086 } |
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1087 |
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1088 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1089 |
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1090 virtual int cell_count() const { |
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1091 return CounterData::static_cell_count() + |
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1092 TypeEntriesAtCall::header_cell_count() + |
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1093 int_at_unchecked(cell_count_global_offset()); |
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1094 } |
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1095 |
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1096 int number_of_arguments() const { |
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1097 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1098 } |
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1099 |
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1100 void set_argument_type(int i, Klass* k) { |
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1101 assert(has_arguments(), "no arguments!"); |
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1102 intptr_t current = _args.type(i); |
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1103 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1104 } |
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1105 |
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1106 void set_return_type(Klass* k) { |
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1107 assert(has_return(), "no return!"); |
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1108 intptr_t current = _ret.type(); |
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1109 _ret.set_type(TypeEntries::with_status(k, current)); |
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1110 } |
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1111 |
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1112 // An entry for a return value takes less space than an entry for an |
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1113 // argument so if the number of cells exceeds the number of cells |
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1114 // needed for an argument, this object contains type information for |
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1115 // at least one argument. |
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1116 bool has_arguments() const { |
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1117 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1118 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1119 return res; |
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1120 } |
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1121 |
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1122 // An entry for a return value takes less space than an entry for an |
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1123 // argument, so if the remainder of the number of cells divided by |
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1124 // the number of cells for an argument is not null, a return value |
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1125 // is profiled in this object. |
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1126 bool has_return() const { |
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1127 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1128 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1129 return res; |
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1130 } |
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1131 |
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1132 // Code generation support |
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1133 static ByteSize args_data_offset() { |
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1134 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1135 } |
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1136 |
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1137 // GC support |
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1138 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1139 if (has_arguments()) { |
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1140 _args.clean_weak_klass_links(is_alive_closure); |
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1141 } |
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1142 if (has_return()) { |
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1143 _ret.clean_weak_klass_links(is_alive_closure); |
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1144 } |
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1145 } |
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1146 |
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1147 #ifndef PRODUCT |
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1148 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1149 #endif |
1150 }; | |
1151 | |
1152 // ReceiverTypeData | |
1153 // | |
1154 // A ReceiverTypeData is used to access profiling information about a | |
1155 // dynamic type check. It consists of a counter which counts the total times | |
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1156 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1157 // which are used to store a type profile for the receiver of the check. |
1158 class ReceiverTypeData : public CounterData { | |
1159 protected: | |
1160 enum { | |
1161 receiver0_offset = counter_cell_count, | |
1162 count0_offset, | |
1163 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1164 }; | |
1165 | |
1166 public: | |
1167 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1168 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1169 layout->tag() == DataLayout::virtual_call_data_tag || |
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1170 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1171 } |
1172 | |
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1173 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1174 |
1175 static int static_cell_count() { | |
1176 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
1177 } | |
1178 | |
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1179 virtual int cell_count() const { |
0 | 1180 return static_cell_count(); |
1181 } | |
1182 | |
1183 // Direct accessors | |
1184 static uint row_limit() { | |
1185 return TypeProfileWidth; | |
1186 } | |
1187 static int receiver_cell_index(uint row) { | |
1188 return receiver0_offset + row * receiver_type_row_cell_count; | |
1189 } | |
1190 static int receiver_count_cell_index(uint row) { | |
1191 return count0_offset + row * receiver_type_row_cell_count; | |
1192 } | |
1193 | |
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1194 Klass* receiver(uint row) const { |
0 | 1195 assert(row < row_limit(), "oob"); |
1196 | |
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1197 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1198 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1199 return recv; |
1200 } | |
1201 | |
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1202 void set_receiver(uint row, Klass* k) { |
941 | 1203 assert((uint)row < row_limit(), "oob"); |
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1204 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1205 } |
1206 | |
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1207 uint receiver_count(uint row) const { |
0 | 1208 assert(row < row_limit(), "oob"); |
1209 return uint_at(receiver_count_cell_index(row)); | |
1210 } | |
1211 | |
941 | 1212 void set_receiver_count(uint row, uint count) { |
1213 assert(row < row_limit(), "oob"); | |
1214 set_uint_at(receiver_count_cell_index(row), count); | |
1215 } | |
1216 | |
1217 void clear_row(uint row) { | |
1218 assert(row < row_limit(), "oob"); | |
1251
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1219 // Clear total count - indicator of polymorphic call site. |
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1220 // The site may look like as monomorphic after that but |
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1221 // it allow to have more accurate profiling information because |
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1222 // there was execution phase change since klasses were unloaded. |
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1223 // If the site is still polymorphic then MDO will be updated |
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1224 // to reflect it. But it could be the case that the site becomes |
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1225 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1226 // Even if we use monomorphic (when it is not) for compilation |
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1227 // we will only have trap, deoptimization and recompile again |
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1228 // with updated MDO after executing method in Interpreter. |
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1229 // An additional receiver will be recorded in the cleaned row |
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1230 // during next call execution. |
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1231 // |
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1232 // Note: our profiling logic works with empty rows in any slot. |
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1233 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1234 // |
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1235 set_count(0); |
941 | 1236 set_receiver(row, NULL); |
1237 set_receiver_count(row, 0); | |
1238 } | |
1239 | |
0 | 1240 // Code generation support |
1241 static ByteSize receiver_offset(uint row) { | |
1242 return cell_offset(receiver_cell_index(row)); | |
1243 } | |
1244 static ByteSize receiver_count_offset(uint row) { | |
1245 return cell_offset(receiver_count_cell_index(row)); | |
1246 } | |
1247 static ByteSize receiver_type_data_size() { | |
1248 return cell_offset(static_cell_count()); | |
1249 } | |
1250 | |
1251 // GC support | |
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1252 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1253 |
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1254 #ifdef CC_INTERP |
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1255 static int receiver_type_data_size_in_bytes() { |
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1256 return cell_offset_in_bytes(static_cell_count()); |
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1257 } |
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1258 |
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1259 static Klass *receiver_unchecked(DataLayout* layout, uint row) { |
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1260 Klass* recv = (Klass*)layout->cell_at(receiver_cell_index(row)); |
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1261 return recv; |
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1262 } |
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1263 |
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1264 static void increment_receiver_count_no_overflow(DataLayout* layout, Klass *rcvr) { |
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1265 const int num_rows = row_limit(); |
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1266 // Receiver already exists? |
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1267 for (int row = 0; row < num_rows; row++) { |
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1268 if (receiver_unchecked(layout, row) == rcvr) { |
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1269 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1270 return; |
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1271 } |
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1272 } |
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1273 // New receiver, find a free slot. |
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1274 for (int row = 0; row < num_rows; row++) { |
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1275 if (receiver_unchecked(layout, row) == NULL) { |
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1276 set_intptr_at(layout, receiver_cell_index(row), (intptr_t)rcvr); |
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1277 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1278 return; |
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1279 } |
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1280 } |
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1281 // Receiver did not match any saved receiver and there is no empty row for it. |
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1282 // Increment total counter to indicate polymorphic case. |
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1283 increment_count_no_overflow(layout); |
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1284 } |
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1285 |
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1286 static DataLayout* advance(DataLayout* layout) { |
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1287 return (DataLayout*) (((address)layout) + (ssize_t)ReceiverTypeData::receiver_type_data_size_in_bytes()); |
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1288 } |
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1289 #endif // CC_INTERP |
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1290 |
0 | 1291 #ifndef PRODUCT |
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1292 void print_receiver_data_on(outputStream* st) const; |
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1293 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1294 #endif |
1295 }; | |
1296 | |
1297 // VirtualCallData | |
1298 // | |
1299 // A VirtualCallData is used to access profiling information about a | |
1300 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1301 class VirtualCallData : public ReceiverTypeData { | |
1302 public: | |
1303 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1304 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1305 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1306 } |
1307 | |
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1308 virtual bool is_VirtualCallData() const { return true; } |
0 | 1309 |
1310 static int static_cell_count() { | |
1311 // At this point we could add more profile state, e.g., for arguments. | |
1312 // But for now it's the same size as the base record type. | |
1313 return ReceiverTypeData::static_cell_count(); | |
1314 } | |
1315 | |
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1316 virtual int cell_count() const { |
0 | 1317 return static_cell_count(); |
1318 } | |
1319 | |
1320 // Direct accessors | |
1321 static ByteSize virtual_call_data_size() { | |
1322 return cell_offset(static_cell_count()); | |
1323 } | |
1324 | |
14420
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1325 #ifdef CC_INTERP |
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1326 static int virtual_call_data_size_in_bytes() { |
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1327 return cell_offset_in_bytes(static_cell_count()); |
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1328 } |
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1329 |
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1330 static DataLayout* advance(DataLayout* layout) { |
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1331 return (DataLayout*) (((address)layout) + (ssize_t)VirtualCallData::virtual_call_data_size_in_bytes()); |
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1332 } |
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1333 #endif // CC_INTERP |
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1334 |
0 | 1335 #ifndef PRODUCT |
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1336 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1337 #endif |
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1338 }; |
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1339 |
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1340 // VirtualCallTypeData |
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1341 // |
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1342 // A VirtualCallTypeData is used to access profiling information about |
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1343 // a virtual call for which we collect type information about |
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1344 // arguments and return value. |
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1345 class VirtualCallTypeData : public VirtualCallData { |
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1346 private: |
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1347 // entries for arguments if any |
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1348 TypeStackSlotEntries _args; |
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1349 // entry for return type if any |
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1350 ReturnTypeEntry _ret; |
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1351 |
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1352 int cell_count_global_offset() const { |
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1353 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1354 } |
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1355 |
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1356 // number of cells not counting the header |
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1357 int cell_count_no_header() const { |
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1358 return uint_at(cell_count_global_offset()); |
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1359 } |
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1360 |
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1361 void check_number_of_arguments(int total) { |
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1362 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1363 } |
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1364 |
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1365 public: |
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1366 VirtualCallTypeData(DataLayout* layout) : |
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1367 VirtualCallData(layout), |
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1368 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1369 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1370 { |
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1371 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1372 // Some compilers (VC++) don't want this passed in member initialization list |
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1373 _args.set_profile_data(this); |
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1374 _ret.set_profile_data(this); |
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1375 } |
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1376 |
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1377 const TypeStackSlotEntries* args() const { |
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1378 assert(has_arguments(), "no profiling of arguments"); |
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1379 return &_args; |
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1380 } |
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1381 |
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1382 const ReturnTypeEntry* ret() const { |
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1383 assert(has_return(), "no profiling of return value"); |
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1384 return &_ret; |
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1385 } |
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1386 |
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1387 virtual bool is_VirtualCallTypeData() const { return true; } |
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1388 |
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1389 static int static_cell_count() { |
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1390 return -1; |
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1391 } |
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1392 |
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1393 static int compute_cell_count(BytecodeStream* stream) { |
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1394 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1395 } |
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1396 |
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1397 static void initialize(DataLayout* dl, int cell_count) { |
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1398 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1399 } |
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1400 |
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1401 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1402 |
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1403 virtual int cell_count() const { |
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1404 return VirtualCallData::static_cell_count() + |
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1405 TypeEntriesAtCall::header_cell_count() + |
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1406 int_at_unchecked(cell_count_global_offset()); |
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1407 } |
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1408 |
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1409 int number_of_arguments() const { |
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1410 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1411 } |
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1412 |
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1413 void set_argument_type(int i, Klass* k) { |
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1414 assert(has_arguments(), "no arguments!"); |
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1415 intptr_t current = _args.type(i); |
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1416 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1417 } |
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1418 |
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1419 void set_return_type(Klass* k) { |
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1420 assert(has_return(), "no return!"); |
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1421 intptr_t current = _ret.type(); |
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1422 _ret.set_type(TypeEntries::with_status(k, current)); |
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1423 } |
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1424 |
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1425 // An entry for a return value takes less space than an entry for an |
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1426 // argument, so if the remainder of the number of cells divided by |
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1427 // the number of cells for an argument is not null, a return value |
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1428 // is profiled in this object. |
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1429 bool has_return() const { |
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1430 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1431 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1432 return res; |
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1433 } |
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1434 |
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1435 // An entry for a return value takes less space than an entry for an |
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1436 // argument so if the number of cells exceeds the number of cells |
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1437 // needed for an argument, this object contains type information for |
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1438 // at least one argument. |
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1439 bool has_arguments() const { |
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1440 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1441 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1442 return res; |
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1443 } |
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1444 |
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1445 // Code generation support |
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1446 static ByteSize args_data_offset() { |
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1447 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1448 } |
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1449 |
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1450 // GC support |
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1451 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1452 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1453 if (has_arguments()) { |
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1454 _args.clean_weak_klass_links(is_alive_closure); |
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1455 } |
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1456 if (has_return()) { |
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1457 _ret.clean_weak_klass_links(is_alive_closure); |
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1458 } |
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1459 } |
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1460 |
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1461 #ifndef PRODUCT |
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1462 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1463 #endif |
1464 }; | |
1465 | |
1466 // RetData | |
1467 // | |
1468 // A RetData is used to access profiling information for a ret bytecode. | |
1469 // It is composed of a count of the number of times that the ret has | |
1470 // been executed, followed by a series of triples of the form | |
1471 // (bci, count, di) which count the number of times that some bci was the | |
1472 // target of the ret and cache a corresponding data displacement. | |
1473 class RetData : public CounterData { | |
1474 protected: | |
1475 enum { | |
1476 bci0_offset = counter_cell_count, | |
1477 count0_offset, | |
1478 displacement0_offset, | |
1479 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1480 }; | |
1481 | |
1482 void set_bci(uint row, int bci) { | |
1483 assert((uint)row < row_limit(), "oob"); | |
1484 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1485 } | |
1486 void release_set_bci(uint row, int bci) { | |
1487 assert((uint)row < row_limit(), "oob"); | |
1488 // 'release' when setting the bci acts as a valid flag for other | |
1489 // threads wrt bci_count and bci_displacement. | |
1490 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1491 } | |
1492 void set_bci_count(uint row, uint count) { | |
1493 assert((uint)row < row_limit(), "oob"); | |
1494 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1495 } | |
1496 void set_bci_displacement(uint row, int disp) { | |
1497 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1498 } | |
1499 | |
1500 public: | |
1501 RetData(DataLayout* layout) : CounterData(layout) { | |
1502 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1503 } | |
1504 | |
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1505 virtual bool is_RetData() const { return true; } |
0 | 1506 |
1507 enum { | |
1508 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1509 }; | |
1510 | |
1511 static int static_cell_count() { | |
1512 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1513 } | |
1514 | |
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1515 virtual int cell_count() const { |
0 | 1516 return static_cell_count(); |
1517 } | |
1518 | |
1519 static uint row_limit() { | |
1520 return BciProfileWidth; | |
1521 } | |
1522 static int bci_cell_index(uint row) { | |
1523 return bci0_offset + row * ret_row_cell_count; | |
1524 } | |
1525 static int bci_count_cell_index(uint row) { | |
1526 return count0_offset + row * ret_row_cell_count; | |
1527 } | |
1528 static int bci_displacement_cell_index(uint row) { | |
1529 return displacement0_offset + row * ret_row_cell_count; | |
1530 } | |
1531 | |
1532 // Direct accessors | |
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1533 int bci(uint row) const { |
0 | 1534 return int_at(bci_cell_index(row)); |
1535 } | |
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1536 uint bci_count(uint row) const { |
0 | 1537 return uint_at(bci_count_cell_index(row)); |
1538 } | |
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1539 int bci_displacement(uint row) const { |
0 | 1540 return int_at(bci_displacement_cell_index(row)); |
1541 } | |
1542 | |
1543 // Interpreter Runtime support | |
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1544 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1545 |
1546 // Code generation support | |
1547 static ByteSize bci_offset(uint row) { | |
1548 return cell_offset(bci_cell_index(row)); | |
1549 } | |
1550 static ByteSize bci_count_offset(uint row) { | |
1551 return cell_offset(bci_count_cell_index(row)); | |
1552 } | |
1553 static ByteSize bci_displacement_offset(uint row) { | |
1554 return cell_offset(bci_displacement_cell_index(row)); | |
1555 } | |
1556 | |
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1557 #ifdef CC_INTERP |
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1558 static DataLayout* advance(MethodData *md, int bci); |
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1559 #endif // CC_INTERP |
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1560 |
0 | 1561 // Specific initialization. |
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1562 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1563 |
1564 #ifndef PRODUCT | |
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1565 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1566 #endif |
1567 }; | |
1568 | |
1569 // BranchData | |
1570 // | |
1571 // A BranchData is used to access profiling data for a two-way branch. | |
1572 // It consists of taken and not_taken counts as well as a data displacement | |
1573 // for the taken case. | |
1574 class BranchData : public JumpData { | |
1575 protected: | |
1576 enum { | |
1577 not_taken_off_set = jump_cell_count, | |
1578 branch_cell_count | |
1579 }; | |
1580 | |
1581 void set_displacement(int displacement) { | |
1582 set_int_at(displacement_off_set, displacement); | |
1583 } | |
1584 | |
1585 public: | |
1586 BranchData(DataLayout* layout) : JumpData(layout) { | |
1587 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1588 } | |
1589 | |
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1590 virtual bool is_BranchData() const { return true; } |
0 | 1591 |
1592 static int static_cell_count() { | |
1593 return branch_cell_count; | |
1594 } | |
1595 | |
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1596 virtual int cell_count() const { |
0 | 1597 return static_cell_count(); |
1598 } | |
1599 | |
1600 // Direct accessor | |
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1601 uint not_taken() const { |
0 | 1602 return uint_at(not_taken_off_set); |
1603 } | |
1604 | |
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1605 void set_not_taken(uint cnt) { |
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1606 set_uint_at(not_taken_off_set, cnt); |
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1607 } |
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1608 |
0 | 1609 uint inc_not_taken() { |
1610 uint cnt = not_taken() + 1; | |
1611 // Did we wrap? Will compiler screw us?? | |
1612 if (cnt == 0) cnt--; | |
1613 set_uint_at(not_taken_off_set, cnt); | |
1614 return cnt; | |
1615 } | |
1616 | |
1617 // Code generation support | |
1618 static ByteSize not_taken_offset() { | |
1619 return cell_offset(not_taken_off_set); | |
1620 } | |
1621 static ByteSize branch_data_size() { | |
1622 return cell_offset(branch_cell_count); | |
1623 } | |
1624 | |
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1625 #ifdef CC_INTERP |
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1626 static int branch_data_size_in_bytes() { |
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1627 return cell_offset_in_bytes(branch_cell_count); |
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1628 } |
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1629 |
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1630 static void increment_not_taken_count_no_overflow(DataLayout* layout) { |
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1631 increment_uint_at_no_overflow(layout, not_taken_off_set); |
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1632 } |
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1633 |
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1634 static DataLayout* advance_not_taken(DataLayout* layout) { |
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1635 return (DataLayout*) (((address)layout) + (ssize_t)BranchData::branch_data_size_in_bytes()); |
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1636 } |
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1637 #endif // CC_INTERP |
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1638 |
0 | 1639 // Specific initialization. |
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1640 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1641 |
1642 #ifndef PRODUCT | |
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1643 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1644 #endif |
1645 }; | |
1646 | |
1647 // ArrayData | |
1648 // | |
1649 // A ArrayData is a base class for accessing profiling data which does | |
1650 // not have a statically known size. It consists of an array length | |
1651 // and an array start. | |
1652 class ArrayData : public ProfileData { | |
1653 protected: | |
1654 friend class DataLayout; | |
1655 | |
1656 enum { | |
1657 array_len_off_set, | |
1658 array_start_off_set | |
1659 }; | |
1660 | |
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1661 uint array_uint_at(int index) const { |
0 | 1662 int aindex = index + array_start_off_set; |
1663 return uint_at(aindex); | |
1664 } | |
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1665 int array_int_at(int index) const { |
0 | 1666 int aindex = index + array_start_off_set; |
1667 return int_at(aindex); | |
1668 } | |
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1669 oop array_oop_at(int index) const { |
0 | 1670 int aindex = index + array_start_off_set; |
1671 return oop_at(aindex); | |
1672 } | |
1673 void array_set_int_at(int index, int value) { | |
1674 int aindex = index + array_start_off_set; | |
1675 set_int_at(aindex, value); | |
1676 } | |
1677 | |
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1678 #ifdef CC_INTERP |
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1679 // Static low level accessors for DataLayout with ArrayData's semantics. |
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1680 |
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1681 static void increment_array_uint_at_no_overflow(DataLayout* layout, int index) { |
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1682 int aindex = index + array_start_off_set; |
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1683 increment_uint_at_no_overflow(layout, aindex); |
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1684 } |
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1685 |
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1686 static int array_int_at(DataLayout* layout, int index) { |
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1687 int aindex = index + array_start_off_set; |
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1688 return int_at(layout, aindex); |
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1689 } |
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1690 #endif // CC_INTERP |
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1691 |
0 | 1692 // Code generation support for subclasses. |
1693 static ByteSize array_element_offset(int index) { | |
1694 return cell_offset(array_start_off_set + index); | |
1695 } | |
1696 | |
1697 public: | |
1698 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1699 | |
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1700 virtual bool is_ArrayData() const { return true; } |
0 | 1701 |
1702 static int static_cell_count() { | |
1703 return -1; | |
1704 } | |
1705 | |
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1706 int array_len() const { |
0 | 1707 return int_at_unchecked(array_len_off_set); |
1708 } | |
1709 | |
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1710 virtual int cell_count() const { |
0 | 1711 return array_len() + 1; |
1712 } | |
1713 | |
1714 // Code generation support | |
1715 static ByteSize array_len_offset() { | |
1716 return cell_offset(array_len_off_set); | |
1717 } | |
1718 static ByteSize array_start_offset() { | |
1719 return cell_offset(array_start_off_set); | |
1720 } | |
1721 }; | |
1722 | |
1723 // MultiBranchData | |
1724 // | |
1725 // A MultiBranchData is used to access profiling information for | |
1726 // a multi-way branch (*switch bytecodes). It consists of a series | |
1727 // of (count, displacement) pairs, which count the number of times each | |
1728 // case was taken and specify the data displacment for each branch target. | |
1729 class MultiBranchData : public ArrayData { | |
1730 protected: | |
1731 enum { | |
1732 default_count_off_set, | |
1733 default_disaplacement_off_set, | |
1734 case_array_start | |
1735 }; | |
1736 enum { | |
1737 relative_count_off_set, | |
1738 relative_displacement_off_set, | |
1739 per_case_cell_count | |
1740 }; | |
1741 | |
1742 void set_default_displacement(int displacement) { | |
1743 array_set_int_at(default_disaplacement_off_set, displacement); | |
1744 } | |
1745 void set_displacement_at(int index, int displacement) { | |
1746 array_set_int_at(case_array_start + | |
1747 index * per_case_cell_count + | |
1748 relative_displacement_off_set, | |
1749 displacement); | |
1750 } | |
1751 | |
1752 public: | |
1753 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1754 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1755 } | |
1756 | |
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1757 virtual bool is_MultiBranchData() const { return true; } |
0 | 1758 |
1759 static int compute_cell_count(BytecodeStream* stream); | |
1760 | |
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1761 int number_of_cases() const { |
0 | 1762 int alen = array_len() - 2; // get rid of default case here. |
1763 assert(alen % per_case_cell_count == 0, "must be even"); | |
1764 return (alen / per_case_cell_count); | |
1765 } | |
1766 | |
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1767 uint default_count() const { |
0 | 1768 return array_uint_at(default_count_off_set); |
1769 } | |
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1770 int default_displacement() const { |
0 | 1771 return array_int_at(default_disaplacement_off_set); |
1772 } | |
1773 | |
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1774 uint count_at(int index) const { |
0 | 1775 return array_uint_at(case_array_start + |
1776 index * per_case_cell_count + | |
1777 relative_count_off_set); | |
1778 } | |
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1779 int displacement_at(int index) const { |
0 | 1780 return array_int_at(case_array_start + |
1781 index * per_case_cell_count + | |
1782 relative_displacement_off_set); | |
1783 } | |
1784 | |
1785 // Code generation support | |
1786 static ByteSize default_count_offset() { | |
1787 return array_element_offset(default_count_off_set); | |
1788 } | |
1789 static ByteSize default_displacement_offset() { | |
1790 return array_element_offset(default_disaplacement_off_set); | |
1791 } | |
1792 static ByteSize case_count_offset(int index) { | |
1793 return case_array_offset() + | |
1794 (per_case_size() * index) + | |
1795 relative_count_offset(); | |
1796 } | |
1797 static ByteSize case_array_offset() { | |
1798 return array_element_offset(case_array_start); | |
1799 } | |
1800 static ByteSize per_case_size() { | |
1801 return in_ByteSize(per_case_cell_count) * cell_size; | |
1802 } | |
1803 static ByteSize relative_count_offset() { | |
1804 return in_ByteSize(relative_count_off_set) * cell_size; | |
1805 } | |
1806 static ByteSize relative_displacement_offset() { | |
1807 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1808 } | |
1809 | |
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1810 #ifdef CC_INTERP |
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1811 static void increment_count_no_overflow(DataLayout* layout, int index) { |
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1812 if (index == -1) { |
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1813 increment_array_uint_at_no_overflow(layout, default_count_off_set); |
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1814 } else { |
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1815 increment_array_uint_at_no_overflow(layout, case_array_start + |
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1816 index * per_case_cell_count + |
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1817 relative_count_off_set); |
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1818 } |
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1819 } |
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1820 |
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1821 static DataLayout* advance(DataLayout* layout, int index) { |
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1822 if (index == -1) { |
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1823 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, default_disaplacement_off_set)); |
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1824 } else { |
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1825 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, case_array_start + |
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1826 index * per_case_cell_count + |
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1827 relative_displacement_off_set)); |
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1828 } |
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1829 } |
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1830 #endif // CC_INTERP |
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1831 |
0 | 1832 // Specific initialization. |
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1833 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1834 |
1835 #ifndef PRODUCT | |
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1836 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1837 #endif |
1838 }; | |
1839 | |
45
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1840 class ArgInfoData : public ArrayData { |
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1841 |
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1842 public: |
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1843 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1844 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1845 } |
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1846 |
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1847 virtual bool is_ArgInfoData() const { return true; } |
45
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1848 |
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1849 |
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1850 int number_of_args() const { |
45
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1851 return array_len(); |
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1852 } |
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1853 |
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1854 uint arg_modified(int arg) const { |
45
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1855 return array_uint_at(arg); |
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1856 } |
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1857 |
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1858 void set_arg_modified(int arg, uint val) { |
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1859 array_set_int_at(arg, val); |
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1860 } |
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1861 |
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1862 #ifndef PRODUCT |
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1863 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1864 #endif |
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1865 }; |
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1866 |
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1867 // ParametersTypeData |
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1868 // |
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1869 // A ParametersTypeData is used to access profiling information about |
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1870 // types of parameters to a method |
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1871 class ParametersTypeData : public ArrayData { |
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1872 |
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1873 private: |
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1874 TypeStackSlotEntries _parameters; |
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1875 |
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1876 static int stack_slot_local_offset(int i) { |
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1877 assert_profiling_enabled(); |
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1878 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1879 } |
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1880 |
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1881 static int type_local_offset(int i) { |
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1882 assert_profiling_enabled(); |
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1883 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1884 } |
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1885 |
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1886 static bool profiling_enabled(); |
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1887 static void assert_profiling_enabled() { |
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1888 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1889 } |
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1890 |
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1891 public: |
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1892 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1893 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1894 // Some compilers (VC++) don't want this passed in member initialization list |
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1895 _parameters.set_profile_data(this); |
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1896 } |
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1897 |
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1898 static int compute_cell_count(Method* m); |
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1899 |
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1900 virtual bool is_ParametersTypeData() const { return true; } |
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1901 |
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1902 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1903 |
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1904 int number_of_parameters() const { |
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1905 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1906 } |
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1907 |
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1908 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1909 |
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1910 uint stack_slot(int i) const { |
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1911 return _parameters.stack_slot(i); |
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1912 } |
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1913 |
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1914 void set_type(int i, Klass* k) { |
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1915 intptr_t current = _parameters.type(i); |
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1916 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1917 } |
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1918 |
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1919 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1920 _parameters.clean_weak_klass_links(is_alive_closure); |
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1921 } |
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1922 |
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1923 #ifndef PRODUCT |
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1924 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1925 #endif |
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1926 |
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1927 static ByteSize stack_slot_offset(int i) { |
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1928 return cell_offset(stack_slot_local_offset(i)); |
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1929 } |
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1930 |
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1931 static ByteSize type_offset(int i) { |
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1932 return cell_offset(type_local_offset(i)); |
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1933 } |
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1934 }; |
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1935 |
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1936 // SpeculativeTrapData |
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1937 // |
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1938 // A SpeculativeTrapData is used to record traps due to type |
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1939 // speculation. It records the root of the compilation: that type |
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1940 // speculation is wrong in the context of one compilation (for |
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1941 // method1) doesn't mean it's wrong in the context of another one (for |
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1942 // method2). Type speculation could have more/different data in the |
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1943 // context of the compilation of method2 and it's worthwhile to try an |
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1944 // optimization that failed for compilation of method1 in the context |
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1945 // of compilation of method2. |
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1946 // Space for SpeculativeTrapData entries is allocated from the extra |
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1947 // data space in the MDO. If we run out of space, the trap data for |
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1948 // the ProfileData at that bci is updated. |
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1949 class SpeculativeTrapData : public ProfileData { |
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1950 protected: |
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1951 enum { |
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1952 method_offset, |
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1953 speculative_trap_cell_count |
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1954 }; |
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1955 public: |
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1956 SpeculativeTrapData(DataLayout* layout) : ProfileData(layout) { |
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1957 assert(layout->tag() == DataLayout::speculative_trap_data_tag, "wrong type"); |
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1958 } |
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1959 |
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1960 virtual bool is_SpeculativeTrapData() const { return true; } |
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1961 |
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1962 static int static_cell_count() { |
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1963 return speculative_trap_cell_count; |
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1964 } |
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1965 |
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1966 virtual int cell_count() const { |
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1967 return static_cell_count(); |
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1968 } |
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1969 |
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1970 // Direct accessor |
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1971 Method* method() const { |
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1972 return (Method*)intptr_at(method_offset); |
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1973 } |
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1974 |
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1975 void set_method(Method* m) { |
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1976 set_intptr_at(method_offset, (intptr_t)m); |
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1977 } |
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1978 |
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1979 #ifndef PRODUCT |
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1980 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1981 #endif |
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1982 }; |
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1983 |
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1984 // MethodData* |
0 | 1985 // |
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1986 // A MethodData* holds information which has been collected about |
0 | 1987 // a method. Its layout looks like this: |
1988 // | |
1989 // ----------------------------- | |
1990 // | header | | |
1991 // | klass | | |
1992 // ----------------------------- | |
1993 // | method | | |
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1994 // | size of the MethodData* | |
0 | 1995 // ----------------------------- |
1996 // | Data entries... | | |
1997 // | (variable size) | | |
1998 // | | | |
1999 // . . | |
2000 // . . | |
2001 // . . | |
2002 // | | | |
2003 // ----------------------------- | |
2004 // | |
2005 // The data entry area is a heterogeneous array of DataLayouts. Each | |
2006 // DataLayout in the array corresponds to a specific bytecode in the | |
2007 // method. The entries in the array are sorted by the corresponding | |
2008 // bytecode. Access to the data is via resource-allocated ProfileData, | |
2009 // which point to the underlying blocks of DataLayout structures. | |
2010 // | |
2011 // During interpretation, if profiling in enabled, the interpreter | |
2012 // maintains a method data pointer (mdp), which points at the entry | |
2013 // in the array corresponding to the current bci. In the course of | |
2014 // intepretation, when a bytecode is encountered that has profile data | |
2015 // associated with it, the entry pointed to by mdp is updated, then the | |
2016 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
2017 // is NULL to begin with, the interpreter assumes that the current method | |
2018 // is not (yet) being profiled. | |
2019 // | |
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2020 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 2021 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
2022 // from the base of the data entry array. A "displacement" is the byte offset | |
2023 // in certain ProfileData objects that indicate the amount the mdp must be | |
2024 // adjusted in the event of a change in control flow. | |
2025 // | |
2026 | |
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2027 CC_INTERP_ONLY(class BytecodeInterpreter;) |
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2028 |
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2029 class MethodData : public Metadata { |
0 | 2030 friend class VMStructs; |
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2031 CC_INTERP_ONLY(friend class BytecodeInterpreter;) |
0 | 2032 private: |
2033 friend class ProfileData; | |
2034 | |
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2035 // Back pointer to the Method* |
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2036 Method* _method; |
0 | 2037 |
2038 // Size of this oop in bytes | |
2039 int _size; | |
2040 | |
2041 // Cached hint for bci_to_dp and bci_to_data | |
2042 int _hint_di; | |
2043 | |
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2044 Mutex _extra_data_lock; |
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2045 |
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2046 MethodData(methodHandle method, int size, TRAPS); |
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2047 public: |
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2048 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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2049 MethodData() : _extra_data_lock(Monitor::leaf, "MDO extra data lock") {}; // For ciMethodData |
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2050 |
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2051 bool is_methodData() const volatile { return true; } |
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2052 |
0 | 2053 // Whole-method sticky bits and flags |
2054 enum { | |
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2055 _trap_hist_limit = 18, // decoupled from Deoptimization::Reason_LIMIT |
0 | 2056 _trap_hist_mask = max_jubyte, |
2057 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
2058 }; // Public flag values | |
2059 private: | |
2060 uint _nof_decompiles; // count of all nmethod removals | |
2061 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
2062 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
2063 union { | |
2064 intptr_t _align; | |
2065 u1 _array[_trap_hist_limit]; | |
2066 } _trap_hist; | |
2067 | |
2068 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2069 intx _eflags; // flags on escape information | |
2070 intx _arg_local; // bit set of non-escaping arguments | |
2071 intx _arg_stack; // bit set of stack-allocatable arguments | |
2072 intx _arg_returned; // bit set of returned arguments | |
2073 | |
1783 | 2074 int _creation_mileage; // method mileage at MDO creation |
2075 | |
2076 // How many invocations has this MDO seen? | |
2077 // These counters are used to determine the exact age of MDO. | |
2078 // We need those because in tiered a method can be concurrently | |
2079 // executed at different levels. | |
2080 InvocationCounter _invocation_counter; | |
2081 // Same for backedges. | |
2082 InvocationCounter _backedge_counter; | |
2252 | 2083 // Counter values at the time profiling started. |
2084 int _invocation_counter_start; | |
2085 int _backedge_counter_start; | |
1783 | 2086 // Number of loops and blocks is computed when compiling the first |
2087 // time with C1. It is used to determine if method is trivial. | |
2088 short _num_loops; | |
2089 short _num_blocks; | |
2090 // Highest compile level this method has ever seen. | |
2091 u1 _highest_comp_level; | |
2092 // Same for OSR level | |
2093 u1 _highest_osr_comp_level; | |
2094 // Does this method contain anything worth profiling? | |
2095 bool _would_profile; | |
0 | 2096 |
2097 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
2098 int _data_size; | |
2099 | |
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2100 // data index for the area dedicated to parameters. -1 if no |
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2101 // parameter profiling. |
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2102 int _parameters_type_data_di; |
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2103 |
0 | 2104 // Beginning of the data entries |
2105 intptr_t _data[1]; | |
2106 | |
2107 // Helper for size computation | |
2108 static int compute_data_size(BytecodeStream* stream); | |
2109 static int bytecode_cell_count(Bytecodes::Code code); | |
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2110 static bool is_speculative_trap_bytecode(Bytecodes::Code code); |
0 | 2111 enum { no_profile_data = -1, variable_cell_count = -2 }; |
2112 | |
2113 // Helper for initialization | |
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2114 DataLayout* data_layout_at(int data_index) const { |
0 | 2115 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
2116 return (DataLayout*) (((address)_data) + data_index); | |
2117 } | |
2118 | |
2119 // Initialize an individual data segment. Returns the size of | |
2120 // the segment in bytes. | |
2121 int initialize_data(BytecodeStream* stream, int data_index); | |
2122 | |
2123 // Helper for data_at | |
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2124 DataLayout* limit_data_position() const { |
0 | 2125 return (DataLayout*)((address)data_base() + _data_size); |
2126 } | |
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2127 bool out_of_bounds(int data_index) const { |
0 | 2128 return data_index >= data_size(); |
2129 } | |
2130 | |
2131 // Give each of the data entries a chance to perform specific | |
2132 // data initialization. | |
2133 void post_initialize(BytecodeStream* stream); | |
2134 | |
2135 // hint accessors | |
2136 int hint_di() const { return _hint_di; } | |
2137 void set_hint_di(int di) { | |
2138 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
2139 _hint_di = di; | |
2140 } | |
2141 ProfileData* data_before(int bci) { | |
2142 // avoid SEGV on this edge case | |
2143 if (data_size() == 0) | |
2144 return NULL; | |
2145 int hint = hint_di(); | |
2146 if (data_layout_at(hint)->bci() <= bci) | |
2147 return data_at(hint); | |
2148 return first_data(); | |
2149 } | |
2150 | |
2151 // What is the index of the first data entry? | |
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2152 int first_di() const { return 0; } |
0 | 2153 |
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2154 ProfileData* bci_to_extra_data_helper(int bci, Method* m, DataLayout*& dp, bool concurrent); |
0 | 2155 // Find or create an extra ProfileData: |
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2156 ProfileData* bci_to_extra_data(int bci, Method* m, bool create_if_missing); |
0 | 2157 |
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2158 // return the argument info cell |
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2159 ArgInfoData *arg_info(); |
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2160 |
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2161 enum { |
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2162 no_type_profile = 0, |
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2163 type_profile_jsr292 = 1, |
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2164 type_profile_all = 2 |
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2165 }; |
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2166 |
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2167 static bool profile_jsr292(methodHandle m, int bci); |
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2168 static int profile_arguments_flag(); |
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2169 static bool profile_arguments_jsr292_only(); |
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2170 static bool profile_all_arguments(); |
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2171 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2172 static int profile_return_flag(); |
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2173 static bool profile_all_return(); |
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2174 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2175 static int profile_parameters_flag(); |
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2176 static bool profile_parameters_jsr292_only(); |
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2177 static bool profile_all_parameters(); |
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2178 |
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2179 void clean_extra_data(BoolObjectClosure* is_alive); |
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2180 void clean_extra_data_helper(DataLayout* dp, int shift, bool reset = false); |
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2181 void verify_extra_data_clean(BoolObjectClosure* is_alive); |
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2182 |
0 | 2183 public: |
2184 static int header_size() { | |
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2185 return sizeof(MethodData)/wordSize; |
0 | 2186 } |
2187 | |
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2188 // Compute the size of a MethodData* before it is created. |
0 | 2189 static int compute_allocation_size_in_bytes(methodHandle method); |
2190 static int compute_allocation_size_in_words(methodHandle method); | |
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2191 static int compute_extra_data_count(int data_size, int empty_bc_count, bool needs_speculative_traps); |
0 | 2192 |
2193 // Determine if a given bytecode can have profile information. | |
2194 static bool bytecode_has_profile(Bytecodes::Code code) { | |
2195 return bytecode_cell_count(code) != no_profile_data; | |
2196 } | |
2197 | |
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2198 // reset into original state |
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2199 void init(); |
0 | 2200 |
2201 // My size | |
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2202 int size_in_bytes() const { return _size; } |
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2203 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 2204 #if INCLUDE_SERVICES |
2205 void collect_statistics(KlassSizeStats *sz) const; | |
2206 #endif | |
0 | 2207 |
2208 int creation_mileage() const { return _creation_mileage; } | |
2209 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 2210 |
2211 int invocation_count() { | |
2212 if (invocation_counter()->carry()) { | |
2213 return InvocationCounter::count_limit; | |
2214 } | |
2215 return invocation_counter()->count(); | |
2216 } | |
2217 int backedge_count() { | |
2218 if (backedge_counter()->carry()) { | |
2219 return InvocationCounter::count_limit; | |
2220 } | |
2221 return backedge_counter()->count(); | |
2222 } | |
2223 | |
2252 | 2224 int invocation_count_start() { |
2225 if (invocation_counter()->carry()) { | |
2226 return 0; | |
2227 } | |
2228 return _invocation_counter_start; | |
2229 } | |
2230 | |
2231 int backedge_count_start() { | |
2232 if (backedge_counter()->carry()) { | |
2233 return 0; | |
2234 } | |
2235 return _backedge_counter_start; | |
2236 } | |
2237 | |
2238 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
2239 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
2240 | |
2241 void reset_start_counters() { | |
2242 _invocation_counter_start = invocation_count(); | |
2243 _backedge_counter_start = backedge_count(); | |
2244 } | |
2245 | |
1783 | 2246 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
2247 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
2248 | |
2249 void set_would_profile(bool p) { _would_profile = p; } | |
2250 bool would_profile() const { return _would_profile; } | |
2251 | |
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2252 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 2253 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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2254 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2255 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2256 | |
2257 int num_loops() const { return _num_loops; } | |
2258 void set_num_loops(int n) { _num_loops = n; } | |
2259 int num_blocks() const { return _num_blocks; } | |
2260 void set_num_blocks(int n) { _num_blocks = n; } | |
2261 | |
0 | 2262 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2263 static int mileage_of(Method* m); |
0 | 2264 |
2265 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2266 enum EscapeFlag { | |
2267 estimated = 1 << 0, | |
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2268 return_local = 1 << 1, |
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2269 return_allocated = 1 << 2, |
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2270 allocated_escapes = 1 << 3, |
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2271 unknown_modified = 1 << 4 |
0 | 2272 }; |
2273 | |
2274 intx eflags() { return _eflags; } | |
2275 intx arg_local() { return _arg_local; } | |
2276 intx arg_stack() { return _arg_stack; } | |
2277 intx arg_returned() { return _arg_returned; } | |
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2278 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2279 assert(aid != NULL, "arg_info must be not null"); |
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2280 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2281 return aid->arg_modified(a); } |
0 | 2282 |
2283 void set_eflags(intx v) { _eflags = v; } | |
2284 void set_arg_local(intx v) { _arg_local = v; } | |
2285 void set_arg_stack(intx v) { _arg_stack = v; } | |
2286 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2287 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2288 assert(aid != NULL, "arg_info must be not null"); |
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2289 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2290 aid->set_arg_modified(a, v); } |
0 | 2291 |
2292 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2293 | |
2294 // Location and size of data area | |
2295 address data_base() const { | |
2296 return (address) _data; | |
2297 } | |
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2298 int data_size() const { |
0 | 2299 return _data_size; |
2300 } | |
2301 | |
2302 // Accessors | |
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2303 Method* method() const { return _method; } |
0 | 2304 |
2305 // Get the data at an arbitrary (sort of) data index. | |
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2306 ProfileData* data_at(int data_index) const; |
0 | 2307 |
2308 // Walk through the data in order. | |
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2309 ProfileData* first_data() const { return data_at(first_di()); } |
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2310 ProfileData* next_data(ProfileData* current) const; |
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2311 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2312 |
2313 // Convert a dp (data pointer) to a di (data index). | |
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2314 int dp_to_di(address dp) const { |
0 | 2315 return dp - ((address)_data); |
2316 } | |
2317 | |
2318 address di_to_dp(int di) { | |
2319 return (address)data_layout_at(di); | |
2320 } | |
2321 | |
2322 // bci to di/dp conversion. | |
2323 address bci_to_dp(int bci); | |
2324 int bci_to_di(int bci) { | |
2325 return dp_to_di(bci_to_dp(bci)); | |
2326 } | |
2327 | |
2328 // Get the data at an arbitrary bci, or NULL if there is none. | |
2329 ProfileData* bci_to_data(int bci); | |
2330 | |
2331 // Same, but try to create an extra_data record if one is needed: | |
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2332 ProfileData* allocate_bci_to_data(int bci, Method* m) { |
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2333 ProfileData* data = NULL; |
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2334 // If m not NULL, try to allocate a SpeculativeTrapData entry |
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2335 if (m == NULL) { |
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2336 data = bci_to_data(bci); |
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2337 } |
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2338 if (data != NULL) { |
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2339 return data; |
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2340 } |
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2341 data = bci_to_extra_data(bci, m, true); |
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2342 if (data != NULL) { |
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2343 return data; |
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2344 } |
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2345 // If SpeculativeTrapData allocation fails try to allocate a |
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2346 // regular entry |
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2347 data = bci_to_data(bci); |
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2348 if (data != NULL) { |
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2349 return data; |
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2350 } |
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2351 return bci_to_extra_data(bci, NULL, true); |
0 | 2352 } |
2353 | |
2354 // Add a handful of extra data records, for trap tracking. | |
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2355 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2356 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2357 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2358 - (address)extra_data_base(); } |
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2359 static DataLayout* next_extra(DataLayout* dp); |
0 | 2360 |
2361 // Return (uint)-1 for overflow. | |
2362 uint trap_count(int reason) const { | |
2363 assert((uint)reason < _trap_hist_limit, "oob"); | |
2364 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2365 } | |
2366 // For loops: | |
2367 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2368 static uint trap_count_limit() { return _trap_hist_mask; } | |
2369 uint inc_trap_count(int reason) { | |
2370 // Count another trap, anywhere in this method. | |
2371 assert(reason >= 0, "must be single trap"); | |
2372 if ((uint)reason < _trap_hist_limit) { | |
2373 uint cnt1 = 1 + _trap_hist._array[reason]; | |
2374 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
2375 _trap_hist._array[reason] = cnt1; | |
2376 return cnt1; | |
2377 } else { | |
2378 return _trap_hist_mask + (++_nof_overflow_traps); | |
2379 } | |
2380 } else { | |
2381 // Could not represent the count in the histogram. | |
2382 return (++_nof_overflow_traps); | |
2383 } | |
2384 } | |
2385 | |
2386 uint overflow_trap_count() const { | |
2387 return _nof_overflow_traps; | |
2388 } | |
2389 uint overflow_recompile_count() const { | |
2390 return _nof_overflow_recompiles; | |
2391 } | |
2392 void inc_overflow_recompile_count() { | |
2393 _nof_overflow_recompiles += 1; | |
2394 } | |
2395 uint decompile_count() const { | |
2396 return _nof_decompiles; | |
2397 } | |
2398 void inc_decompile_count() { | |
2399 _nof_decompiles += 1; | |
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2400 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2401 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2402 } |
0 | 2403 } |
2404 | |
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2405 // Return pointer to area dedicated to parameters in MDO |
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2406 ParametersTypeData* parameters_type_data() const { |
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2407 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2408 } |
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2409 |
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2410 int parameters_type_data_di() const { |
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2411 assert(_parameters_type_data_di != -1, "no args type data"); |
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2412 return _parameters_type_data_di; |
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2413 } |
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2414 |
0 | 2415 // Support for code generation |
2416 static ByteSize data_offset() { | |
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2417 return byte_offset_of(MethodData, _data[0]); |
0 | 2418 } |
2419 | |
1783 | 2420 static ByteSize invocation_counter_offset() { |
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2421 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2422 } |
2423 static ByteSize backedge_counter_offset() { | |
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2424 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2425 } |
2426 | |
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2427 static ByteSize parameters_type_data_di_offset() { |
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2428 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2429 } |
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2430 |
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2431 // Deallocation support - no pointer fields to deallocate |
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2432 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2433 |
0 | 2434 // GC support |
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2435 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2436 |
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2437 // Printing |
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2438 #ifndef PRODUCT |
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2439 void print_on (outputStream* st) const; |
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2440 #endif |
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2441 void print_value_on(outputStream* st) const; |
0 | 2442 |
2443 #ifndef PRODUCT | |
2444 // printing support for method data | |
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2445 void print_data_on(outputStream* st) const; |
0 | 2446 #endif |
2447 | |
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2448 const char* internal_name() const { return "{method data}"; } |
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2449 |
0 | 2450 // verification |
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2451 void verify_on(outputStream* st); |
0 | 2452 void verify_data_on(outputStream* st); |
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2453 |
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2454 static bool profile_parameters_for_method(methodHandle m); |
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2455 static bool profile_arguments(); |
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2456 static bool profile_return(); |
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2457 static bool profile_parameters(); |
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2458 static bool profile_return_jsr292_only(); |
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2459 |
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2460 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 2461 }; |
1972 | 2462 |
2463 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |