Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/methodData.hpp @ 14433:018b357638aa
8028514: PPC64: Fix C++ Interpreter after '7195622: CheckUnhandledOops has limited usefulness now'
Summary: fix CPP-interpreter after CheckUnhandledOops was re-enabled in the fastdebug build
Reviewed-by: kvn, dholmes, lfoltan
author | simonis |
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date | Tue, 19 Nov 2013 11:53:58 -0800 |
parents | 2b8e28fdf503 |
children | da862781b584 |
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 |
0 | 124 }; |
125 | |
126 enum { | |
127 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
128 // The trap state breaks down further as [recompile:1 | reason:3]. | |
129 // This further breakdown is defined in deoptimization.cpp. | |
130 // See Deoptimization::trap_state_reason for an assert that | |
131 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
132 // | |
133 // The trap_state is collected only if ProfileTraps is true. | |
134 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
135 trap_shift = BitsPerByte - trap_bits, | |
136 trap_mask = right_n_bits(trap_bits), | |
137 trap_mask_in_place = (trap_mask << trap_shift), | |
138 flag_limit = trap_shift, | |
139 flag_mask = right_n_bits(flag_limit), | |
140 first_flag = 0 | |
141 }; | |
142 | |
143 // Size computation | |
144 static int header_size_in_bytes() { | |
145 return cell_size; | |
146 } | |
147 static int header_size_in_cells() { | |
148 return 1; | |
149 } | |
150 | |
151 static int compute_size_in_bytes(int cell_count) { | |
152 return header_size_in_bytes() + cell_count * cell_size; | |
153 } | |
154 | |
155 // Initialization | |
156 void initialize(u1 tag, u2 bci, int cell_count); | |
157 | |
158 // Accessors | |
159 u1 tag() { | |
160 return _header._struct._tag; | |
161 } | |
162 | |
163 // Return a few bits of trap state. Range is [0..trap_mask]. | |
164 // The state tells if traps with zero, one, or many reasons have occurred. | |
165 // It also tells whether zero or many recompilations have occurred. | |
166 // The associated trap histogram in the MDO itself tells whether | |
167 // traps are common or not. If a BCI shows that a trap X has | |
168 // occurred, and the MDO shows N occurrences of X, we make the | |
169 // simplifying assumption that all N occurrences can be blamed | |
170 // on that BCI. | |
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171 int trap_state() const { |
0 | 172 return ((_header._struct._flags >> trap_shift) & trap_mask); |
173 } | |
174 | |
175 void set_trap_state(int new_state) { | |
176 assert(ProfileTraps, "used only under +ProfileTraps"); | |
177 uint old_flags = (_header._struct._flags & flag_mask); | |
178 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
179 } | |
180 | |
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181 u1 flags() const { |
0 | 182 return _header._struct._flags; |
183 } | |
184 | |
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185 u2 bci() const { |
0 | 186 return _header._struct._bci; |
187 } | |
188 | |
189 void set_header(intptr_t value) { | |
190 _header._bits = value; | |
191 } | |
192 void release_set_header(intptr_t value) { | |
193 OrderAccess::release_store_ptr(&_header._bits, value); | |
194 } | |
195 intptr_t header() { | |
196 return _header._bits; | |
197 } | |
198 void set_cell_at(int index, intptr_t value) { | |
199 _cells[index] = value; | |
200 } | |
201 void release_set_cell_at(int index, intptr_t value) { | |
202 OrderAccess::release_store_ptr(&_cells[index], value); | |
203 } | |
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204 intptr_t cell_at(int index) const { |
0 | 205 return _cells[index]; |
206 } | |
207 | |
208 void set_flag_at(int flag_number) { | |
209 assert(flag_number < flag_limit, "oob"); | |
210 _header._struct._flags |= (0x1 << flag_number); | |
211 } | |
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212 bool flag_at(int flag_number) const { |
0 | 213 assert(flag_number < flag_limit, "oob"); |
214 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
215 } | |
216 | |
217 // Low-level support for code generation. | |
218 static ByteSize header_offset() { | |
219 return byte_offset_of(DataLayout, _header); | |
220 } | |
221 static ByteSize tag_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._tag); | |
223 } | |
224 static ByteSize flags_offset() { | |
225 return byte_offset_of(DataLayout, _header._struct._flags); | |
226 } | |
227 static ByteSize bci_offset() { | |
228 return byte_offset_of(DataLayout, _header._struct._bci); | |
229 } | |
230 static ByteSize cell_offset(int index) { | |
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231 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 232 } |
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233 #ifdef CC_INTERP |
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234 static int cell_offset_in_bytes(int index) { |
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235 return (int)offset_of(DataLayout, _cells[index]); |
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236 } |
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237 #endif // CC_INTERP |
0 | 238 // Return a value which, when or-ed as a byte into _flags, sets the flag. |
239 static int flag_number_to_byte_constant(int flag_number) { | |
240 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
241 DataLayout temp; temp.set_header(0); | |
242 temp.set_flag_at(flag_number); | |
243 return temp._header._struct._flags; | |
244 } | |
245 // Return a value which, when or-ed as a word into _header, sets the flag. | |
246 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
247 DataLayout temp; temp.set_header(0); | |
248 temp._header._struct._flags = byte_constant; | |
249 return temp._header._bits; | |
250 } | |
941 | 251 |
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252 ProfileData* data_in(); |
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253 |
941 | 254 // GC support |
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255 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 256 }; |
257 | |
258 | |
259 // ProfileData class hierarchy | |
260 class ProfileData; | |
261 class BitData; | |
262 class CounterData; | |
263 class ReceiverTypeData; | |
264 class VirtualCallData; | |
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265 class VirtualCallTypeData; |
0 | 266 class RetData; |
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267 class CallTypeData; |
0 | 268 class JumpData; |
269 class BranchData; | |
270 class ArrayData; | |
271 class MultiBranchData; | |
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272 class ArgInfoData; |
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273 class ParametersTypeData; |
0 | 274 |
275 // ProfileData | |
276 // | |
277 // A ProfileData object is created to refer to a section of profiling | |
278 // data in a structured way. | |
279 class ProfileData : public ResourceObj { | |
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280 friend class TypeEntries; |
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281 friend class ReturnTypeEntry; |
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282 friend class TypeStackSlotEntries; |
0 | 283 private: |
284 #ifndef PRODUCT | |
285 enum { | |
286 tab_width_one = 16, | |
287 tab_width_two = 36 | |
288 }; | |
289 #endif // !PRODUCT | |
290 | |
291 // This is a pointer to a section of profiling data. | |
292 DataLayout* _data; | |
293 | |
294 protected: | |
295 DataLayout* data() { return _data; } | |
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296 const DataLayout* data() const { return _data; } |
0 | 297 |
298 enum { | |
299 cell_size = DataLayout::cell_size | |
300 }; | |
301 | |
302 public: | |
303 // How many cells are in this? | |
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304 virtual int cell_count() const { |
0 | 305 ShouldNotReachHere(); |
306 return -1; | |
307 } | |
308 | |
309 // Return the size of this data. | |
310 int size_in_bytes() { | |
311 return DataLayout::compute_size_in_bytes(cell_count()); | |
312 } | |
313 | |
314 protected: | |
315 // Low-level accessors for underlying data | |
316 void set_intptr_at(int index, intptr_t value) { | |
317 assert(0 <= index && index < cell_count(), "oob"); | |
318 data()->set_cell_at(index, value); | |
319 } | |
320 void release_set_intptr_at(int index, intptr_t value) { | |
321 assert(0 <= index && index < cell_count(), "oob"); | |
322 data()->release_set_cell_at(index, value); | |
323 } | |
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324 intptr_t intptr_at(int index) const { |
0 | 325 assert(0 <= index && index < cell_count(), "oob"); |
326 return data()->cell_at(index); | |
327 } | |
328 void set_uint_at(int index, uint value) { | |
329 set_intptr_at(index, (intptr_t) value); | |
330 } | |
331 void release_set_uint_at(int index, uint value) { | |
332 release_set_intptr_at(index, (intptr_t) value); | |
333 } | |
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334 uint uint_at(int index) const { |
0 | 335 return (uint)intptr_at(index); |
336 } | |
337 void set_int_at(int index, int value) { | |
338 set_intptr_at(index, (intptr_t) value); | |
339 } | |
340 void release_set_int_at(int index, int value) { | |
341 release_set_intptr_at(index, (intptr_t) value); | |
342 } | |
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343 int int_at(int index) const { |
0 | 344 return (int)intptr_at(index); |
345 } | |
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346 int int_at_unchecked(int index) const { |
0 | 347 return (int)data()->cell_at(index); |
348 } | |
349 void set_oop_at(int index, oop value) { | |
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350 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 351 } |
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352 oop oop_at(int index) const { |
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353 return cast_to_oop(intptr_at(index)); |
0 | 354 } |
355 | |
356 void set_flag_at(int flag_number) { | |
357 data()->set_flag_at(flag_number); | |
358 } | |
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359 bool flag_at(int flag_number) const { |
0 | 360 return data()->flag_at(flag_number); |
361 } | |
362 | |
363 // two convenient imports for use by subclasses: | |
364 static ByteSize cell_offset(int index) { | |
365 return DataLayout::cell_offset(index); | |
366 } | |
367 static int flag_number_to_byte_constant(int flag_number) { | |
368 return DataLayout::flag_number_to_byte_constant(flag_number); | |
369 } | |
370 | |
371 ProfileData(DataLayout* data) { | |
372 _data = data; | |
373 } | |
374 | |
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375 #ifdef CC_INTERP |
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376 // Static low level accessors for DataLayout with ProfileData's semantics. |
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377 |
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378 static int cell_offset_in_bytes(int index) { |
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379 return DataLayout::cell_offset_in_bytes(index); |
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380 } |
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381 |
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382 static void increment_uint_at_no_overflow(DataLayout* layout, int index, |
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383 int inc = DataLayout::counter_increment) { |
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384 uint count = ((uint)layout->cell_at(index)) + inc; |
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385 if (count == 0) return; |
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386 layout->set_cell_at(index, (intptr_t) count); |
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387 } |
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388 |
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389 static int int_at(DataLayout* layout, int index) { |
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390 return (int)layout->cell_at(index); |
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391 } |
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392 |
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393 static int uint_at(DataLayout* layout, int index) { |
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394 return (uint)layout->cell_at(index); |
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395 } |
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396 |
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397 static oop oop_at(DataLayout* layout, int index) { |
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398 return cast_to_oop(layout->cell_at(index)); |
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399 } |
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400 |
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401 static void set_intptr_at(DataLayout* layout, int index, intptr_t value) { |
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402 layout->set_cell_at(index, (intptr_t) value); |
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403 } |
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404 |
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405 static void set_flag_at(DataLayout* layout, int flag_number) { |
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406 layout->set_flag_at(flag_number); |
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407 } |
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408 #endif // CC_INTERP |
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409 |
0 | 410 public: |
411 // Constructor for invalid ProfileData. | |
412 ProfileData(); | |
413 | |
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414 u2 bci() const { |
0 | 415 return data()->bci(); |
416 } | |
417 | |
418 address dp() { | |
419 return (address)_data; | |
420 } | |
421 | |
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422 int trap_state() const { |
0 | 423 return data()->trap_state(); |
424 } | |
425 void set_trap_state(int new_state) { | |
426 data()->set_trap_state(new_state); | |
427 } | |
428 | |
429 // Type checking | |
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430 virtual bool is_BitData() const { return false; } |
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431 virtual bool is_CounterData() const { return false; } |
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432 virtual bool is_JumpData() const { return false; } |
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433 virtual bool is_ReceiverTypeData()const { return false; } |
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434 virtual bool is_VirtualCallData() const { return false; } |
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435 virtual bool is_RetData() const { return false; } |
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436 virtual bool is_BranchData() const { return false; } |
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437 virtual bool is_ArrayData() const { return false; } |
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438 virtual bool is_MultiBranchData() const { return false; } |
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439 virtual bool is_ArgInfoData() const { return false; } |
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440 virtual bool is_CallTypeData() const { return false; } |
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441 virtual bool is_VirtualCallTypeData()const { return false; } |
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442 virtual bool is_ParametersTypeData() const { return false; } |
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443 |
0 | 444 |
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445 BitData* as_BitData() const { |
0 | 446 assert(is_BitData(), "wrong type"); |
447 return is_BitData() ? (BitData*) this : NULL; | |
448 } | |
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449 CounterData* as_CounterData() const { |
0 | 450 assert(is_CounterData(), "wrong type"); |
451 return is_CounterData() ? (CounterData*) this : NULL; | |
452 } | |
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453 JumpData* as_JumpData() const { |
0 | 454 assert(is_JumpData(), "wrong type"); |
455 return is_JumpData() ? (JumpData*) this : NULL; | |
456 } | |
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457 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 458 assert(is_ReceiverTypeData(), "wrong type"); |
459 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
460 } | |
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461 VirtualCallData* as_VirtualCallData() const { |
0 | 462 assert(is_VirtualCallData(), "wrong type"); |
463 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
464 } | |
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465 RetData* as_RetData() const { |
0 | 466 assert(is_RetData(), "wrong type"); |
467 return is_RetData() ? (RetData*) this : NULL; | |
468 } | |
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469 BranchData* as_BranchData() const { |
0 | 470 assert(is_BranchData(), "wrong type"); |
471 return is_BranchData() ? (BranchData*) this : NULL; | |
472 } | |
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473 ArrayData* as_ArrayData() const { |
0 | 474 assert(is_ArrayData(), "wrong type"); |
475 return is_ArrayData() ? (ArrayData*) this : NULL; | |
476 } | |
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477 MultiBranchData* as_MultiBranchData() const { |
0 | 478 assert(is_MultiBranchData(), "wrong type"); |
479 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
480 } | |
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481 ArgInfoData* as_ArgInfoData() const { |
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482 assert(is_ArgInfoData(), "wrong type"); |
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483 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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484 } |
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485 CallTypeData* as_CallTypeData() const { |
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486 assert(is_CallTypeData(), "wrong type"); |
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487 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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488 } |
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489 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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490 assert(is_VirtualCallTypeData(), "wrong type"); |
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491 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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492 } |
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493 ParametersTypeData* as_ParametersTypeData() const { |
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494 assert(is_ParametersTypeData(), "wrong type"); |
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495 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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496 } |
0 | 497 |
498 | |
499 // Subclass specific initialization | |
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500 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 501 |
502 // GC support | |
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503 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 504 |
505 // CI translation: ProfileData can represent both MethodDataOop data | |
506 // as well as CIMethodData data. This function is provided for translating | |
507 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
508 // most ProfileData don't require any translation, so we provide the null | |
509 // translation here, and the required translators are in the ci subclasses. | |
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510 virtual void translate_from(const ProfileData* data) {} |
0 | 511 |
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512 virtual void print_data_on(outputStream* st) const { |
0 | 513 ShouldNotReachHere(); |
514 } | |
515 | |
516 #ifndef PRODUCT | |
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517 void print_shared(outputStream* st, const char* name) const; |
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518 void tab(outputStream* st, bool first = false) const; |
0 | 519 #endif |
520 }; | |
521 | |
522 // BitData | |
523 // | |
524 // A BitData holds a flag or two in its header. | |
525 class BitData : public ProfileData { | |
526 protected: | |
527 enum { | |
528 // null_seen: | |
529 // saw a null operand (cast/aastore/instanceof) | |
530 null_seen_flag = DataLayout::first_flag + 0 | |
531 }; | |
532 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
533 public: | |
534 BitData(DataLayout* layout) : ProfileData(layout) { | |
535 } | |
536 | |
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537 virtual bool is_BitData() const { return true; } |
0 | 538 |
539 static int static_cell_count() { | |
540 return bit_cell_count; | |
541 } | |
542 | |
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543 virtual int cell_count() const { |
0 | 544 return static_cell_count(); |
545 } | |
546 | |
547 // Accessor | |
548 | |
549 // The null_seen flag bit is specially known to the interpreter. | |
550 // Consulting it allows the compiler to avoid setting up null_check traps. | |
551 bool null_seen() { return flag_at(null_seen_flag); } | |
552 void set_null_seen() { set_flag_at(null_seen_flag); } | |
553 | |
554 | |
555 // Code generation support | |
556 static int null_seen_byte_constant() { | |
557 return flag_number_to_byte_constant(null_seen_flag); | |
558 } | |
559 | |
560 static ByteSize bit_data_size() { | |
561 return cell_offset(bit_cell_count); | |
562 } | |
563 | |
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564 #ifdef CC_INTERP |
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565 static int bit_data_size_in_bytes() { |
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566 return cell_offset_in_bytes(bit_cell_count); |
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567 } |
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568 |
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569 static void set_null_seen(DataLayout* layout) { |
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570 set_flag_at(layout, null_seen_flag); |
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571 } |
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572 |
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573 static DataLayout* advance(DataLayout* layout) { |
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574 return (DataLayout*) (((address)layout) + (ssize_t)BitData::bit_data_size_in_bytes()); |
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575 } |
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576 #endif // CC_INTERP |
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577 |
0 | 578 #ifndef PRODUCT |
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579 void print_data_on(outputStream* st) const; |
0 | 580 #endif |
581 }; | |
582 | |
583 // CounterData | |
584 // | |
585 // A CounterData corresponds to a simple counter. | |
586 class CounterData : public BitData { | |
587 protected: | |
588 enum { | |
589 count_off, | |
590 counter_cell_count | |
591 }; | |
592 public: | |
593 CounterData(DataLayout* layout) : BitData(layout) {} | |
594 | |
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595 virtual bool is_CounterData() const { return true; } |
0 | 596 |
597 static int static_cell_count() { | |
598 return counter_cell_count; | |
599 } | |
600 | |
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601 virtual int cell_count() const { |
0 | 602 return static_cell_count(); |
603 } | |
604 | |
605 // Direct accessor | |
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606 uint count() const { |
0 | 607 return uint_at(count_off); |
608 } | |
609 | |
610 // Code generation support | |
611 static ByteSize count_offset() { | |
612 return cell_offset(count_off); | |
613 } | |
614 static ByteSize counter_data_size() { | |
615 return cell_offset(counter_cell_count); | |
616 } | |
617 | |
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618 void set_count(uint count) { |
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619 set_uint_at(count_off, count); |
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620 } |
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621 |
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622 #ifdef CC_INTERP |
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623 static int counter_data_size_in_bytes() { |
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624 return cell_offset_in_bytes(counter_cell_count); |
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625 } |
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626 |
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627 static void increment_count_no_overflow(DataLayout* layout) { |
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628 increment_uint_at_no_overflow(layout, count_off); |
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629 } |
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630 |
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631 // Support counter decrementation at checkcast / subtype check failed. |
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632 static void decrement_count(DataLayout* layout) { |
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633 increment_uint_at_no_overflow(layout, count_off, -1); |
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634 } |
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635 |
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636 static DataLayout* advance(DataLayout* layout) { |
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637 return (DataLayout*) (((address)layout) + (ssize_t)CounterData::counter_data_size_in_bytes()); |
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638 } |
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639 #endif // CC_INTERP |
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640 |
0 | 641 #ifndef PRODUCT |
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642 void print_data_on(outputStream* st) const; |
0 | 643 #endif |
644 }; | |
645 | |
646 // JumpData | |
647 // | |
648 // A JumpData is used to access profiling information for a direct | |
649 // branch. It is a counter, used for counting the number of branches, | |
650 // plus a data displacement, used for realigning the data pointer to | |
651 // the corresponding target bci. | |
652 class JumpData : public ProfileData { | |
653 protected: | |
654 enum { | |
655 taken_off_set, | |
656 displacement_off_set, | |
657 jump_cell_count | |
658 }; | |
659 | |
660 void set_displacement(int displacement) { | |
661 set_int_at(displacement_off_set, displacement); | |
662 } | |
663 | |
664 public: | |
665 JumpData(DataLayout* layout) : ProfileData(layout) { | |
666 assert(layout->tag() == DataLayout::jump_data_tag || | |
667 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
668 } | |
669 | |
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670 virtual bool is_JumpData() const { return true; } |
0 | 671 |
672 static int static_cell_count() { | |
673 return jump_cell_count; | |
674 } | |
675 | |
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676 virtual int cell_count() const { |
0 | 677 return static_cell_count(); |
678 } | |
679 | |
680 // Direct accessor | |
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681 uint taken() const { |
0 | 682 return uint_at(taken_off_set); |
683 } | |
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684 |
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685 void set_taken(uint cnt) { |
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686 set_uint_at(taken_off_set, cnt); |
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687 } |
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688 |
0 | 689 // Saturating counter |
690 uint inc_taken() { | |
691 uint cnt = taken() + 1; | |
692 // Did we wrap? Will compiler screw us?? | |
693 if (cnt == 0) cnt--; | |
694 set_uint_at(taken_off_set, cnt); | |
695 return cnt; | |
696 } | |
697 | |
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698 int displacement() const { |
0 | 699 return int_at(displacement_off_set); |
700 } | |
701 | |
702 // Code generation support | |
703 static ByteSize taken_offset() { | |
704 return cell_offset(taken_off_set); | |
705 } | |
706 | |
707 static ByteSize displacement_offset() { | |
708 return cell_offset(displacement_off_set); | |
709 } | |
710 | |
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711 #ifdef CC_INTERP |
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712 static void increment_taken_count_no_overflow(DataLayout* layout) { |
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713 increment_uint_at_no_overflow(layout, taken_off_set); |
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714 } |
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715 |
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716 static DataLayout* advance_taken(DataLayout* layout) { |
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717 return (DataLayout*) (((address)layout) + (ssize_t)int_at(layout, displacement_off_set)); |
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718 } |
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719 |
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720 static uint taken_count(DataLayout* layout) { |
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721 return (uint) uint_at(layout, taken_off_set); |
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722 } |
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723 #endif // CC_INTERP |
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724 |
0 | 725 // Specific initialization. |
6725
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726 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 727 |
728 #ifndef PRODUCT | |
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729 void print_data_on(outputStream* st) const; |
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730 #endif |
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731 }; |
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732 |
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733 // Entries in a ProfileData object to record types: it can either be |
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734 // none (no profile), unknown (conflicting profile data) or a klass if |
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735 // a single one is seen. Whether a null reference was seen is also |
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736 // recorded. No counter is associated with the type and a single type |
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737 // is tracked (unlike VirtualCallData). |
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738 class TypeEntries { |
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739 |
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740 public: |
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741 |
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742 // A single cell is used to record information for a type: |
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743 // - the cell is initialized to 0 |
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744 // - when a type is discovered it is stored in the cell |
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745 // - bit zero of the cell is used to record whether a null reference |
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746 // was encountered or not |
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747 // - bit 1 is set to record a conflict in the type information |
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748 |
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749 enum { |
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750 null_seen = 1, |
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751 type_mask = ~null_seen, |
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752 type_unknown = 2, |
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753 status_bits = null_seen | type_unknown, |
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754 type_klass_mask = ~status_bits |
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755 }; |
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756 |
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757 // what to initialize a cell to |
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758 static intptr_t type_none() { |
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759 return 0; |
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760 } |
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761 |
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762 // null seen = bit 0 set? |
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763 static bool was_null_seen(intptr_t v) { |
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764 return (v & null_seen) != 0; |
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765 } |
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766 |
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767 // conflicting type information = bit 1 set? |
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768 static bool is_type_unknown(intptr_t v) { |
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769 return (v & type_unknown) != 0; |
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770 } |
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771 |
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772 // not type information yet = all bits cleared, ignoring bit 0? |
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773 static bool is_type_none(intptr_t v) { |
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774 return (v & type_mask) == 0; |
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775 } |
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776 |
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777 // recorded type: cell without bit 0 and 1 |
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778 static intptr_t klass_part(intptr_t v) { |
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779 intptr_t r = v & type_klass_mask; |
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780 assert (r != 0, "invalid"); |
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781 return r; |
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782 } |
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783 |
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784 // type recorded |
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785 static Klass* valid_klass(intptr_t k) { |
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786 if (!is_type_none(k) && |
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787 !is_type_unknown(k)) { |
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788 return (Klass*)klass_part(k); |
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789 } else { |
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790 return NULL; |
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791 } |
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792 } |
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793 |
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794 static intptr_t with_status(intptr_t k, intptr_t in) { |
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795 return k | (in & status_bits); |
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796 } |
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797 |
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798 static intptr_t with_status(Klass* k, intptr_t in) { |
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799 return with_status((intptr_t)k, in); |
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800 } |
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801 |
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802 #ifndef PRODUCT |
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803 static void print_klass(outputStream* st, intptr_t k); |
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804 #endif |
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805 |
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806 // GC support |
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807 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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808 |
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809 protected: |
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810 // ProfileData object these entries are part of |
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811 ProfileData* _pd; |
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812 // offset within the ProfileData object where the entries start |
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813 const int _base_off; |
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814 |
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815 TypeEntries(int base_off) |
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816 : _base_off(base_off), _pd(NULL) {} |
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817 |
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818 void set_intptr_at(int index, intptr_t value) { |
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819 _pd->set_intptr_at(index, value); |
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820 } |
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821 |
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822 intptr_t intptr_at(int index) const { |
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823 return _pd->intptr_at(index); |
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|
824 } |
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|
825 |
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|
826 public: |
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|
827 void set_profile_data(ProfileData* pd) { |
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|
828 _pd = pd; |
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|
829 } |
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|
830 }; |
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|
831 |
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832 // Type entries used for arguments passed at a call and parameters on |
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833 // method entry. 2 cells per entry: one for the type encoded as in |
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834 // TypeEntries and one initialized with the stack slot where the |
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835 // profiled object is to be found so that the interpreter can locate |
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836 // it quickly. |
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837 class TypeStackSlotEntries : public TypeEntries { |
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|
838 |
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|
839 private: |
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|
840 enum { |
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|
841 stack_slot_entry, |
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|
842 type_entry, |
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|
843 per_arg_cell_count |
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|
844 }; |
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|
845 |
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846 // offset of cell for stack slot for entry i within ProfileData object |
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847 int stack_slot_offset(int i) const { |
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848 return _base_off + stack_slot_local_offset(i); |
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849 } |
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|
850 |
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851 protected: |
12882
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852 const int _number_of_entries; |
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853 |
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854 // offset of cell for type for entry i within ProfileData object |
12882
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855 int type_offset(int i) const { |
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856 return _base_off + type_local_offset(i); |
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|
857 } |
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|
858 |
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|
859 public: |
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|
860 |
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861 TypeStackSlotEntries(int base_off, int nb_entries) |
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862 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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|
863 |
12962
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864 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
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865 |
12962
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866 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
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867 |
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|
868 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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869 static int stack_slot_local_offset(int i) { |
12882
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870 return i * per_arg_cell_count + stack_slot_entry; |
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|
871 } |
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|
872 |
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|
873 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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874 static int type_local_offset(int i) { |
12882
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875 return i * per_arg_cell_count + type_entry; |
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|
876 } |
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|
877 |
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|
878 // stack slot for entry i |
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|
879 uint stack_slot(int i) const { |
12882
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880 assert(i >= 0 && i < _number_of_entries, "oob"); |
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881 return _pd->uint_at(stack_slot_offset(i)); |
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|
882 } |
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|
883 |
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|
884 // set stack slot for entry i |
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|
885 void set_stack_slot(int i, uint num) { |
12882
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886 assert(i >= 0 && i < _number_of_entries, "oob"); |
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887 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
888 } |
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|
889 |
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|
890 // type for entry i |
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|
891 intptr_t type(int i) const { |
12882
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892 assert(i >= 0 && i < _number_of_entries, "oob"); |
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893 return _pd->intptr_at(type_offset(i)); |
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|
894 } |
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|
895 |
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|
896 // set type for entry i |
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|
897 void set_type(int i, intptr_t k) { |
12882
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898 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
899 _pd->set_intptr_at(type_offset(i), k); |
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|
900 } |
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|
901 |
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|
902 static ByteSize per_arg_size() { |
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|
903 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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|
904 } |
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|
905 |
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|
906 static int per_arg_count() { |
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|
907 return per_arg_cell_count ; |
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|
908 } |
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|
909 |
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|
910 // GC support |
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|
911 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
912 |
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|
913 #ifndef PRODUCT |
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|
914 void print_data_on(outputStream* st) const; |
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915 #endif |
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|
916 }; |
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|
917 |
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918 // Type entry used for return from a call. A single cell to record the |
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|
919 // type. |
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|
920 class ReturnTypeEntry : public TypeEntries { |
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|
921 |
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|
922 private: |
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|
923 enum { |
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924 cell_count = 1 |
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|
925 }; |
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|
926 |
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|
927 public: |
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|
928 ReturnTypeEntry(int base_off) |
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|
929 : TypeEntries(base_off) {} |
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|
930 |
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|
931 void post_initialize() { |
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|
932 set_type(type_none()); |
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|
933 } |
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|
934 |
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|
935 intptr_t type() const { |
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936 return _pd->intptr_at(_base_off); |
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|
937 } |
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|
938 |
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|
939 void set_type(intptr_t k) { |
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|
940 _pd->set_intptr_at(_base_off, k); |
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|
941 } |
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|
942 |
12882
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|
943 static int static_cell_count() { |
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|
944 return cell_count; |
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|
945 } |
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|
946 |
12882
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|
947 static ByteSize size() { |
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|
948 return in_ByteSize(cell_count * DataLayout::cell_size); |
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|
949 } |
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|
950 |
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|
951 ByteSize type_offset() { |
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952 return DataLayout::cell_offset(_base_off); |
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|
953 } |
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|
954 |
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|
955 // GC support |
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|
956 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
957 |
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|
958 #ifndef PRODUCT |
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959 void print_data_on(outputStream* st) const; |
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960 #endif |
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961 }; |
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962 |
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963 // Entries to collect type information at a call: contains arguments |
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964 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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965 // number of cells. Because the number of cells for the return type is |
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966 // smaller than the number of cells for the type of an arguments, the |
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967 // number of cells is used to tell how many arguments are profiled and |
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968 // whether a return value is profiled. See has_arguments() and |
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969 // has_return(). |
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970 class TypeEntriesAtCall { |
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971 private: |
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972 static int stack_slot_local_offset(int i) { |
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973 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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974 } |
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975 |
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976 static int argument_type_local_offset(int i) { |
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977 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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978 } |
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979 |
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980 public: |
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981 |
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982 static int header_cell_count() { |
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983 return 1; |
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984 } |
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985 |
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986 static int cell_count_local_offset() { |
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987 return 0; |
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988 } |
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989 |
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990 static int compute_cell_count(BytecodeStream* stream); |
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991 |
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992 static void initialize(DataLayout* dl, int base, int cell_count) { |
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993 int off = base + cell_count_local_offset(); |
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994 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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995 } |
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996 |
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997 static bool arguments_profiling_enabled(); |
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998 static bool return_profiling_enabled(); |
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999 |
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1000 // Code generation support |
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1001 static ByteSize cell_count_offset() { |
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1002 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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1003 } |
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1004 |
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1005 static ByteSize args_data_offset() { |
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1006 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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1007 } |
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1008 |
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1009 static ByteSize stack_slot_offset(int i) { |
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1010 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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1011 } |
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1012 |
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1013 static ByteSize argument_type_offset(int i) { |
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1014 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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1015 } |
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1016 }; |
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1017 |
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1018 // CallTypeData |
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1019 // |
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1020 // A CallTypeData is used to access profiling information about a non |
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1021 // virtual call for which we collect type information about arguments |
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1022 // and return value. |
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1023 class CallTypeData : public CounterData { |
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1024 private: |
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1025 // entries for arguments if any |
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1026 TypeStackSlotEntries _args; |
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1027 // entry for return type if any |
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1028 ReturnTypeEntry _ret; |
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1029 |
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1030 int cell_count_global_offset() const { |
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1031 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1032 } |
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1033 |
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1034 // number of cells not counting the header |
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1035 int cell_count_no_header() const { |
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1036 return uint_at(cell_count_global_offset()); |
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1037 } |
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1038 |
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1039 void check_number_of_arguments(int total) { |
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1040 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1041 } |
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1042 |
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1043 public: |
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1044 CallTypeData(DataLayout* layout) : |
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1045 CounterData(layout), |
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1046 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1047 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1048 { |
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1049 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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1050 // Some compilers (VC++) don't want this passed in member initialization list |
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1051 _args.set_profile_data(this); |
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1052 _ret.set_profile_data(this); |
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1053 } |
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1054 |
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1055 const TypeStackSlotEntries* args() const { |
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1056 assert(has_arguments(), "no profiling of arguments"); |
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1057 return &_args; |
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1058 } |
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1059 |
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1060 const ReturnTypeEntry* ret() const { |
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1061 assert(has_return(), "no profiling of return value"); |
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1062 return &_ret; |
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1063 } |
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1064 |
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1065 virtual bool is_CallTypeData() const { return true; } |
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1066 |
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1067 static int static_cell_count() { |
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1068 return -1; |
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1069 } |
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1070 |
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1071 static int compute_cell_count(BytecodeStream* stream) { |
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1072 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1073 } |
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1074 |
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1075 static void initialize(DataLayout* dl, int cell_count) { |
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1076 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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1077 } |
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1078 |
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1079 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1080 |
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1081 virtual int cell_count() const { |
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1082 return CounterData::static_cell_count() + |
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1083 TypeEntriesAtCall::header_cell_count() + |
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1084 int_at_unchecked(cell_count_global_offset()); |
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1085 } |
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1086 |
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1087 int number_of_arguments() const { |
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1088 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1089 } |
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1090 |
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1091 void set_argument_type(int i, Klass* k) { |
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1092 assert(has_arguments(), "no arguments!"); |
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1093 intptr_t current = _args.type(i); |
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1094 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1095 } |
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1096 |
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1097 void set_return_type(Klass* k) { |
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1098 assert(has_return(), "no return!"); |
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1099 intptr_t current = _ret.type(); |
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1100 _ret.set_type(TypeEntries::with_status(k, current)); |
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1101 } |
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1102 |
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1103 // An entry for a return value takes less space than an entry for an |
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1104 // argument so if the number of cells exceeds the number of cells |
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1105 // needed for an argument, this object contains type information for |
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1106 // at least one argument. |
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1107 bool has_arguments() const { |
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1108 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1109 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1110 return res; |
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1111 } |
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1112 |
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1113 // An entry for a return value takes less space than an entry for an |
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1114 // argument, so if the remainder of the number of cells divided by |
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1115 // the number of cells for an argument is not null, a return value |
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1116 // is profiled in this object. |
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1117 bool has_return() const { |
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1118 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1119 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1120 return res; |
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1121 } |
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1122 |
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1123 // Code generation support |
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1124 static ByteSize args_data_offset() { |
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1125 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1126 } |
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1127 |
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1128 // GC support |
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1129 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1130 if (has_arguments()) { |
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1131 _args.clean_weak_klass_links(is_alive_closure); |
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1132 } |
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1133 if (has_return()) { |
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1134 _ret.clean_weak_klass_links(is_alive_closure); |
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1135 } |
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1136 } |
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1137 |
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1138 #ifndef PRODUCT |
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1139 virtual void print_data_on(outputStream* st) const; |
0 | 1140 #endif |
1141 }; | |
1142 | |
1143 // ReceiverTypeData | |
1144 // | |
1145 // A ReceiverTypeData is used to access profiling information about a | |
1146 // dynamic type check. It consists of a counter which counts the total times | |
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1147 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1148 // which are used to store a type profile for the receiver of the check. |
1149 class ReceiverTypeData : public CounterData { | |
1150 protected: | |
1151 enum { | |
1152 receiver0_offset = counter_cell_count, | |
1153 count0_offset, | |
1154 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1155 }; | |
1156 | |
1157 public: | |
1158 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1159 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1160 layout->tag() == DataLayout::virtual_call_data_tag || |
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1161 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1162 } |
1163 | |
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1164 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1165 |
1166 static int static_cell_count() { | |
1167 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
1168 } | |
1169 | |
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1170 virtual int cell_count() const { |
0 | 1171 return static_cell_count(); |
1172 } | |
1173 | |
1174 // Direct accessors | |
1175 static uint row_limit() { | |
1176 return TypeProfileWidth; | |
1177 } | |
1178 static int receiver_cell_index(uint row) { | |
1179 return receiver0_offset + row * receiver_type_row_cell_count; | |
1180 } | |
1181 static int receiver_count_cell_index(uint row) { | |
1182 return count0_offset + row * receiver_type_row_cell_count; | |
1183 } | |
1184 | |
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1185 Klass* receiver(uint row) const { |
0 | 1186 assert(row < row_limit(), "oob"); |
1187 | |
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1188 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1189 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1190 return recv; |
1191 } | |
1192 | |
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1193 void set_receiver(uint row, Klass* k) { |
941 | 1194 assert((uint)row < row_limit(), "oob"); |
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1195 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1196 } |
1197 | |
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1198 uint receiver_count(uint row) const { |
0 | 1199 assert(row < row_limit(), "oob"); |
1200 return uint_at(receiver_count_cell_index(row)); | |
1201 } | |
1202 | |
941 | 1203 void set_receiver_count(uint row, uint count) { |
1204 assert(row < row_limit(), "oob"); | |
1205 set_uint_at(receiver_count_cell_index(row), count); | |
1206 } | |
1207 | |
1208 void clear_row(uint row) { | |
1209 assert(row < row_limit(), "oob"); | |
1251
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1210 // Clear total count - indicator of polymorphic call site. |
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1211 // The site may look like as monomorphic after that but |
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1212 // it allow to have more accurate profiling information because |
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1213 // there was execution phase change since klasses were unloaded. |
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1214 // If the site is still polymorphic then MDO will be updated |
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1215 // to reflect it. But it could be the case that the site becomes |
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1216 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1217 // Even if we use monomorphic (when it is not) for compilation |
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1218 // we will only have trap, deoptimization and recompile again |
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1219 // with updated MDO after executing method in Interpreter. |
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1220 // An additional receiver will be recorded in the cleaned row |
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1221 // during next call execution. |
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1222 // |
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1223 // Note: our profiling logic works with empty rows in any slot. |
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1224 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1225 // |
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1226 set_count(0); |
941 | 1227 set_receiver(row, NULL); |
1228 set_receiver_count(row, 0); | |
1229 } | |
1230 | |
0 | 1231 // Code generation support |
1232 static ByteSize receiver_offset(uint row) { | |
1233 return cell_offset(receiver_cell_index(row)); | |
1234 } | |
1235 static ByteSize receiver_count_offset(uint row) { | |
1236 return cell_offset(receiver_count_cell_index(row)); | |
1237 } | |
1238 static ByteSize receiver_type_data_size() { | |
1239 return cell_offset(static_cell_count()); | |
1240 } | |
1241 | |
1242 // GC support | |
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1243 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1244 |
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1245 #ifdef CC_INTERP |
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1246 static int receiver_type_data_size_in_bytes() { |
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1247 return cell_offset_in_bytes(static_cell_count()); |
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1248 } |
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1249 |
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1250 static Klass *receiver_unchecked(DataLayout* layout, uint row) { |
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1251 Klass* recv = (Klass*)layout->cell_at(receiver_cell_index(row)); |
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1252 return recv; |
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1253 } |
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1254 |
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1255 static void increment_receiver_count_no_overflow(DataLayout* layout, Klass *rcvr) { |
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1256 const int num_rows = row_limit(); |
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1257 // Receiver already exists? |
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1258 for (int row = 0; row < num_rows; row++) { |
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1259 if (receiver_unchecked(layout, row) == rcvr) { |
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1260 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1261 return; |
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1262 } |
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1263 } |
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1264 // New receiver, find a free slot. |
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1265 for (int row = 0; row < num_rows; row++) { |
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1266 if (receiver_unchecked(layout, row) == NULL) { |
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1267 set_intptr_at(layout, receiver_cell_index(row), (intptr_t)rcvr); |
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1268 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1269 return; |
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1270 } |
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1271 } |
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1272 // Receiver did not match any saved receiver and there is no empty row for it. |
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1273 // Increment total counter to indicate polymorphic case. |
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1274 increment_count_no_overflow(layout); |
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1275 } |
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1276 |
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1277 static DataLayout* advance(DataLayout* layout) { |
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1278 return (DataLayout*) (((address)layout) + (ssize_t)ReceiverTypeData::receiver_type_data_size_in_bytes()); |
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1279 } |
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1280 #endif // CC_INTERP |
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1281 |
0 | 1282 #ifndef PRODUCT |
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1283 void print_receiver_data_on(outputStream* st) const; |
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1284 void print_data_on(outputStream* st) const; |
0 | 1285 #endif |
1286 }; | |
1287 | |
1288 // VirtualCallData | |
1289 // | |
1290 // A VirtualCallData is used to access profiling information about a | |
1291 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1292 class VirtualCallData : public ReceiverTypeData { | |
1293 public: | |
1294 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1295 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1296 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1297 } |
1298 | |
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1299 virtual bool is_VirtualCallData() const { return true; } |
0 | 1300 |
1301 static int static_cell_count() { | |
1302 // At this point we could add more profile state, e.g., for arguments. | |
1303 // But for now it's the same size as the base record type. | |
1304 return ReceiverTypeData::static_cell_count(); | |
1305 } | |
1306 | |
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1307 virtual int cell_count() const { |
0 | 1308 return static_cell_count(); |
1309 } | |
1310 | |
1311 // Direct accessors | |
1312 static ByteSize virtual_call_data_size() { | |
1313 return cell_offset(static_cell_count()); | |
1314 } | |
1315 | |
14420
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1316 #ifdef CC_INTERP |
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1317 static int virtual_call_data_size_in_bytes() { |
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1318 return cell_offset_in_bytes(static_cell_count()); |
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1319 } |
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1320 |
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1321 static DataLayout* advance(DataLayout* layout) { |
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1322 return (DataLayout*) (((address)layout) + (ssize_t)VirtualCallData::virtual_call_data_size_in_bytes()); |
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1323 } |
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1324 #endif // CC_INTERP |
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1325 |
0 | 1326 #ifndef PRODUCT |
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1327 void print_data_on(outputStream* st) const; |
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1328 #endif |
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1329 }; |
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1330 |
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1331 // VirtualCallTypeData |
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1332 // |
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1333 // A VirtualCallTypeData is used to access profiling information about |
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1334 // a virtual call for which we collect type information about |
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1335 // arguments and return value. |
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1336 class VirtualCallTypeData : public VirtualCallData { |
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1337 private: |
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1338 // entries for arguments if any |
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1339 TypeStackSlotEntries _args; |
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1340 // entry for return type if any |
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1341 ReturnTypeEntry _ret; |
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1342 |
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1343 int cell_count_global_offset() const { |
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1344 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1345 } |
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1346 |
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1347 // number of cells not counting the header |
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1348 int cell_count_no_header() const { |
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1349 return uint_at(cell_count_global_offset()); |
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1350 } |
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1351 |
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1352 void check_number_of_arguments(int total) { |
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1353 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1354 } |
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1355 |
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1356 public: |
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1357 VirtualCallTypeData(DataLayout* layout) : |
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1358 VirtualCallData(layout), |
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1359 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1360 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1361 { |
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1362 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1363 // Some compilers (VC++) don't want this passed in member initialization list |
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1364 _args.set_profile_data(this); |
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1365 _ret.set_profile_data(this); |
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1366 } |
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1367 |
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1368 const TypeStackSlotEntries* args() const { |
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1369 assert(has_arguments(), "no profiling of arguments"); |
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1370 return &_args; |
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1371 } |
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1372 |
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1373 const ReturnTypeEntry* ret() const { |
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1374 assert(has_return(), "no profiling of return value"); |
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1375 return &_ret; |
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1376 } |
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1377 |
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1378 virtual bool is_VirtualCallTypeData() const { return true; } |
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1379 |
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1380 static int static_cell_count() { |
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1381 return -1; |
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1382 } |
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1383 |
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1384 static int compute_cell_count(BytecodeStream* stream) { |
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1385 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1386 } |
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1387 |
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1388 static void initialize(DataLayout* dl, int cell_count) { |
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1389 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1390 } |
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1391 |
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1392 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1393 |
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1394 virtual int cell_count() const { |
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1395 return VirtualCallData::static_cell_count() + |
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1396 TypeEntriesAtCall::header_cell_count() + |
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1397 int_at_unchecked(cell_count_global_offset()); |
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1398 } |
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1399 |
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1400 int number_of_arguments() const { |
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1401 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1402 } |
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1403 |
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1404 void set_argument_type(int i, Klass* k) { |
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1405 assert(has_arguments(), "no arguments!"); |
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1406 intptr_t current = _args.type(i); |
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1407 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1408 } |
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1409 |
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1410 void set_return_type(Klass* k) { |
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1411 assert(has_return(), "no return!"); |
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1412 intptr_t current = _ret.type(); |
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1413 _ret.set_type(TypeEntries::with_status(k, current)); |
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1414 } |
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1415 |
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1416 // An entry for a return value takes less space than an entry for an |
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1417 // argument, so if the remainder of the number of cells divided by |
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1418 // the number of cells for an argument is not null, a return value |
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1419 // is profiled in this object. |
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1420 bool has_return() const { |
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1421 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1422 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1423 return res; |
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1424 } |
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1425 |
12962
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1426 // An entry for a return value takes less space than an entry for an |
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1427 // argument so if the number of cells exceeds the number of cells |
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1428 // needed for an argument, this object contains type information for |
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1429 // at least one argument. |
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1430 bool has_arguments() const { |
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1431 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1432 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1433 return res; |
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1434 } |
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1435 |
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1436 // Code generation support |
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1437 static ByteSize args_data_offset() { |
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1438 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1439 } |
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1440 |
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1441 // GC support |
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1442 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1443 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1444 if (has_arguments()) { |
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1445 _args.clean_weak_klass_links(is_alive_closure); |
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1446 } |
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1447 if (has_return()) { |
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1448 _ret.clean_weak_klass_links(is_alive_closure); |
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1449 } |
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1450 } |
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1451 |
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1452 #ifndef PRODUCT |
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1453 virtual void print_data_on(outputStream* st) const; |
0 | 1454 #endif |
1455 }; | |
1456 | |
1457 // RetData | |
1458 // | |
1459 // A RetData is used to access profiling information for a ret bytecode. | |
1460 // It is composed of a count of the number of times that the ret has | |
1461 // been executed, followed by a series of triples of the form | |
1462 // (bci, count, di) which count the number of times that some bci was the | |
1463 // target of the ret and cache a corresponding data displacement. | |
1464 class RetData : public CounterData { | |
1465 protected: | |
1466 enum { | |
1467 bci0_offset = counter_cell_count, | |
1468 count0_offset, | |
1469 displacement0_offset, | |
1470 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1471 }; | |
1472 | |
1473 void set_bci(uint row, int bci) { | |
1474 assert((uint)row < row_limit(), "oob"); | |
1475 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1476 } | |
1477 void release_set_bci(uint row, int bci) { | |
1478 assert((uint)row < row_limit(), "oob"); | |
1479 // 'release' when setting the bci acts as a valid flag for other | |
1480 // threads wrt bci_count and bci_displacement. | |
1481 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1482 } | |
1483 void set_bci_count(uint row, uint count) { | |
1484 assert((uint)row < row_limit(), "oob"); | |
1485 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1486 } | |
1487 void set_bci_displacement(uint row, int disp) { | |
1488 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1489 } | |
1490 | |
1491 public: | |
1492 RetData(DataLayout* layout) : CounterData(layout) { | |
1493 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1494 } | |
1495 | |
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1496 virtual bool is_RetData() const { return true; } |
0 | 1497 |
1498 enum { | |
1499 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1500 }; | |
1501 | |
1502 static int static_cell_count() { | |
1503 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1504 } | |
1505 | |
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1506 virtual int cell_count() const { |
0 | 1507 return static_cell_count(); |
1508 } | |
1509 | |
1510 static uint row_limit() { | |
1511 return BciProfileWidth; | |
1512 } | |
1513 static int bci_cell_index(uint row) { | |
1514 return bci0_offset + row * ret_row_cell_count; | |
1515 } | |
1516 static int bci_count_cell_index(uint row) { | |
1517 return count0_offset + row * ret_row_cell_count; | |
1518 } | |
1519 static int bci_displacement_cell_index(uint row) { | |
1520 return displacement0_offset + row * ret_row_cell_count; | |
1521 } | |
1522 | |
1523 // Direct accessors | |
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1524 int bci(uint row) const { |
0 | 1525 return int_at(bci_cell_index(row)); |
1526 } | |
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1527 uint bci_count(uint row) const { |
0 | 1528 return uint_at(bci_count_cell_index(row)); |
1529 } | |
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1530 int bci_displacement(uint row) const { |
0 | 1531 return int_at(bci_displacement_cell_index(row)); |
1532 } | |
1533 | |
1534 // Interpreter Runtime support | |
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1535 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1536 |
1537 // Code generation support | |
1538 static ByteSize bci_offset(uint row) { | |
1539 return cell_offset(bci_cell_index(row)); | |
1540 } | |
1541 static ByteSize bci_count_offset(uint row) { | |
1542 return cell_offset(bci_count_cell_index(row)); | |
1543 } | |
1544 static ByteSize bci_displacement_offset(uint row) { | |
1545 return cell_offset(bci_displacement_cell_index(row)); | |
1546 } | |
1547 | |
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1548 #ifdef CC_INTERP |
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1549 static DataLayout* advance(MethodData *md, int bci); |
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1550 #endif // CC_INTERP |
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1551 |
0 | 1552 // Specific initialization. |
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1553 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1554 |
1555 #ifndef PRODUCT | |
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1556 void print_data_on(outputStream* st) const; |
0 | 1557 #endif |
1558 }; | |
1559 | |
1560 // BranchData | |
1561 // | |
1562 // A BranchData is used to access profiling data for a two-way branch. | |
1563 // It consists of taken and not_taken counts as well as a data displacement | |
1564 // for the taken case. | |
1565 class BranchData : public JumpData { | |
1566 protected: | |
1567 enum { | |
1568 not_taken_off_set = jump_cell_count, | |
1569 branch_cell_count | |
1570 }; | |
1571 | |
1572 void set_displacement(int displacement) { | |
1573 set_int_at(displacement_off_set, displacement); | |
1574 } | |
1575 | |
1576 public: | |
1577 BranchData(DataLayout* layout) : JumpData(layout) { | |
1578 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1579 } | |
1580 | |
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1581 virtual bool is_BranchData() const { return true; } |
0 | 1582 |
1583 static int static_cell_count() { | |
1584 return branch_cell_count; | |
1585 } | |
1586 | |
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1587 virtual int cell_count() const { |
0 | 1588 return static_cell_count(); |
1589 } | |
1590 | |
1591 // Direct accessor | |
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1592 uint not_taken() const { |
0 | 1593 return uint_at(not_taken_off_set); |
1594 } | |
1595 | |
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1596 void set_not_taken(uint cnt) { |
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1597 set_uint_at(not_taken_off_set, cnt); |
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1598 } |
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1599 |
0 | 1600 uint inc_not_taken() { |
1601 uint cnt = not_taken() + 1; | |
1602 // Did we wrap? Will compiler screw us?? | |
1603 if (cnt == 0) cnt--; | |
1604 set_uint_at(not_taken_off_set, cnt); | |
1605 return cnt; | |
1606 } | |
1607 | |
1608 // Code generation support | |
1609 static ByteSize not_taken_offset() { | |
1610 return cell_offset(not_taken_off_set); | |
1611 } | |
1612 static ByteSize branch_data_size() { | |
1613 return cell_offset(branch_cell_count); | |
1614 } | |
1615 | |
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1616 #ifdef CC_INTERP |
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1617 static int branch_data_size_in_bytes() { |
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1618 return cell_offset_in_bytes(branch_cell_count); |
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1619 } |
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1620 |
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1621 static void increment_not_taken_count_no_overflow(DataLayout* layout) { |
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1622 increment_uint_at_no_overflow(layout, not_taken_off_set); |
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1623 } |
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1624 |
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1625 static DataLayout* advance_not_taken(DataLayout* layout) { |
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1626 return (DataLayout*) (((address)layout) + (ssize_t)BranchData::branch_data_size_in_bytes()); |
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1627 } |
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1628 #endif // CC_INTERP |
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1629 |
0 | 1630 // Specific initialization. |
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1631 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1632 |
1633 #ifndef PRODUCT | |
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1634 void print_data_on(outputStream* st) const; |
0 | 1635 #endif |
1636 }; | |
1637 | |
1638 // ArrayData | |
1639 // | |
1640 // A ArrayData is a base class for accessing profiling data which does | |
1641 // not have a statically known size. It consists of an array length | |
1642 // and an array start. | |
1643 class ArrayData : public ProfileData { | |
1644 protected: | |
1645 friend class DataLayout; | |
1646 | |
1647 enum { | |
1648 array_len_off_set, | |
1649 array_start_off_set | |
1650 }; | |
1651 | |
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1652 uint array_uint_at(int index) const { |
0 | 1653 int aindex = index + array_start_off_set; |
1654 return uint_at(aindex); | |
1655 } | |
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1656 int array_int_at(int index) const { |
0 | 1657 int aindex = index + array_start_off_set; |
1658 return int_at(aindex); | |
1659 } | |
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1660 oop array_oop_at(int index) const { |
0 | 1661 int aindex = index + array_start_off_set; |
1662 return oop_at(aindex); | |
1663 } | |
1664 void array_set_int_at(int index, int value) { | |
1665 int aindex = index + array_start_off_set; | |
1666 set_int_at(aindex, value); | |
1667 } | |
1668 | |
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1669 #ifdef CC_INTERP |
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1670 // Static low level accessors for DataLayout with ArrayData's semantics. |
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1671 |
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1672 static void increment_array_uint_at_no_overflow(DataLayout* layout, int index) { |
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1673 int aindex = index + array_start_off_set; |
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1674 increment_uint_at_no_overflow(layout, aindex); |
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1675 } |
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1676 |
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1677 static int array_int_at(DataLayout* layout, int index) { |
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1678 int aindex = index + array_start_off_set; |
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1679 return int_at(layout, aindex); |
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1680 } |
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1681 #endif // CC_INTERP |
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1682 |
0 | 1683 // Code generation support for subclasses. |
1684 static ByteSize array_element_offset(int index) { | |
1685 return cell_offset(array_start_off_set + index); | |
1686 } | |
1687 | |
1688 public: | |
1689 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1690 | |
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1691 virtual bool is_ArrayData() const { return true; } |
0 | 1692 |
1693 static int static_cell_count() { | |
1694 return -1; | |
1695 } | |
1696 | |
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1697 int array_len() const { |
0 | 1698 return int_at_unchecked(array_len_off_set); |
1699 } | |
1700 | |
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1701 virtual int cell_count() const { |
0 | 1702 return array_len() + 1; |
1703 } | |
1704 | |
1705 // Code generation support | |
1706 static ByteSize array_len_offset() { | |
1707 return cell_offset(array_len_off_set); | |
1708 } | |
1709 static ByteSize array_start_offset() { | |
1710 return cell_offset(array_start_off_set); | |
1711 } | |
1712 }; | |
1713 | |
1714 // MultiBranchData | |
1715 // | |
1716 // A MultiBranchData is used to access profiling information for | |
1717 // a multi-way branch (*switch bytecodes). It consists of a series | |
1718 // of (count, displacement) pairs, which count the number of times each | |
1719 // case was taken and specify the data displacment for each branch target. | |
1720 class MultiBranchData : public ArrayData { | |
1721 protected: | |
1722 enum { | |
1723 default_count_off_set, | |
1724 default_disaplacement_off_set, | |
1725 case_array_start | |
1726 }; | |
1727 enum { | |
1728 relative_count_off_set, | |
1729 relative_displacement_off_set, | |
1730 per_case_cell_count | |
1731 }; | |
1732 | |
1733 void set_default_displacement(int displacement) { | |
1734 array_set_int_at(default_disaplacement_off_set, displacement); | |
1735 } | |
1736 void set_displacement_at(int index, int displacement) { | |
1737 array_set_int_at(case_array_start + | |
1738 index * per_case_cell_count + | |
1739 relative_displacement_off_set, | |
1740 displacement); | |
1741 } | |
1742 | |
1743 public: | |
1744 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1745 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1746 } | |
1747 | |
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1748 virtual bool is_MultiBranchData() const { return true; } |
0 | 1749 |
1750 static int compute_cell_count(BytecodeStream* stream); | |
1751 | |
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1752 int number_of_cases() const { |
0 | 1753 int alen = array_len() - 2; // get rid of default case here. |
1754 assert(alen % per_case_cell_count == 0, "must be even"); | |
1755 return (alen / per_case_cell_count); | |
1756 } | |
1757 | |
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1758 uint default_count() const { |
0 | 1759 return array_uint_at(default_count_off_set); |
1760 } | |
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1761 int default_displacement() const { |
0 | 1762 return array_int_at(default_disaplacement_off_set); |
1763 } | |
1764 | |
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1765 uint count_at(int index) const { |
0 | 1766 return array_uint_at(case_array_start + |
1767 index * per_case_cell_count + | |
1768 relative_count_off_set); | |
1769 } | |
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1770 int displacement_at(int index) const { |
0 | 1771 return array_int_at(case_array_start + |
1772 index * per_case_cell_count + | |
1773 relative_displacement_off_set); | |
1774 } | |
1775 | |
1776 // Code generation support | |
1777 static ByteSize default_count_offset() { | |
1778 return array_element_offset(default_count_off_set); | |
1779 } | |
1780 static ByteSize default_displacement_offset() { | |
1781 return array_element_offset(default_disaplacement_off_set); | |
1782 } | |
1783 static ByteSize case_count_offset(int index) { | |
1784 return case_array_offset() + | |
1785 (per_case_size() * index) + | |
1786 relative_count_offset(); | |
1787 } | |
1788 static ByteSize case_array_offset() { | |
1789 return array_element_offset(case_array_start); | |
1790 } | |
1791 static ByteSize per_case_size() { | |
1792 return in_ByteSize(per_case_cell_count) * cell_size; | |
1793 } | |
1794 static ByteSize relative_count_offset() { | |
1795 return in_ByteSize(relative_count_off_set) * cell_size; | |
1796 } | |
1797 static ByteSize relative_displacement_offset() { | |
1798 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1799 } | |
1800 | |
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1801 #ifdef CC_INTERP |
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1802 static void increment_count_no_overflow(DataLayout* layout, int index) { |
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1803 if (index == -1) { |
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1804 increment_array_uint_at_no_overflow(layout, default_count_off_set); |
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1805 } else { |
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1806 increment_array_uint_at_no_overflow(layout, case_array_start + |
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1807 index * per_case_cell_count + |
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1808 relative_count_off_set); |
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1809 } |
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1810 } |
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1811 |
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1812 static DataLayout* advance(DataLayout* layout, int index) { |
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1813 if (index == -1) { |
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1814 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, default_disaplacement_off_set)); |
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1815 } else { |
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1816 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, case_array_start + |
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1817 index * per_case_cell_count + |
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1818 relative_displacement_off_set)); |
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1819 } |
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1820 } |
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1821 #endif // CC_INTERP |
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1822 |
0 | 1823 // Specific initialization. |
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1824 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1825 |
1826 #ifndef PRODUCT | |
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1827 void print_data_on(outputStream* st) const; |
0 | 1828 #endif |
1829 }; | |
1830 | |
45
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1831 class ArgInfoData : public ArrayData { |
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1832 |
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1833 public: |
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1834 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1835 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1836 } |
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1837 |
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1838 virtual bool is_ArgInfoData() const { return true; } |
45
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1839 |
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1840 |
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1841 int number_of_args() const { |
45
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1842 return array_len(); |
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1843 } |
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1844 |
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1845 uint arg_modified(int arg) const { |
45
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1846 return array_uint_at(arg); |
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1847 } |
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1848 |
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1849 void set_arg_modified(int arg, uint val) { |
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1850 array_set_int_at(arg, val); |
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1851 } |
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1852 |
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1853 #ifndef PRODUCT |
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1854 void print_data_on(outputStream* st) const; |
45
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1855 #endif |
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1856 }; |
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1857 |
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1858 // ParametersTypeData |
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1859 // |
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1860 // A ParametersTypeData is used to access profiling information about |
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1861 // types of parameters to a method |
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1862 class ParametersTypeData : public ArrayData { |
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1863 |
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1864 private: |
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1865 TypeStackSlotEntries _parameters; |
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1866 |
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1867 static int stack_slot_local_offset(int i) { |
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1868 assert_profiling_enabled(); |
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1869 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1870 } |
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1871 |
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1872 static int type_local_offset(int i) { |
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1873 assert_profiling_enabled(); |
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1874 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1875 } |
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1876 |
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1877 static bool profiling_enabled(); |
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1878 static void assert_profiling_enabled() { |
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1879 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1880 } |
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1881 |
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1882 public: |
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1883 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1884 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1885 // Some compilers (VC++) don't want this passed in member initialization list |
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1886 _parameters.set_profile_data(this); |
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1887 } |
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1888 |
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1889 static int compute_cell_count(Method* m); |
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1890 |
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1891 virtual bool is_ParametersTypeData() const { return true; } |
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1892 |
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1893 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1894 |
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1895 int number_of_parameters() const { |
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1896 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1897 } |
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1898 |
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1899 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1900 |
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1901 uint stack_slot(int i) const { |
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1902 return _parameters.stack_slot(i); |
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1903 } |
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1904 |
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1905 void set_type(int i, Klass* k) { |
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1906 intptr_t current = _parameters.type(i); |
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1907 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1908 } |
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1909 |
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1910 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1911 _parameters.clean_weak_klass_links(is_alive_closure); |
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1912 } |
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1913 |
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1914 #ifndef PRODUCT |
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1915 virtual void print_data_on(outputStream* st) const; |
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1916 #endif |
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1917 |
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1918 static ByteSize stack_slot_offset(int i) { |
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1919 return cell_offset(stack_slot_local_offset(i)); |
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1920 } |
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1921 |
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1922 static ByteSize type_offset(int i) { |
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1923 return cell_offset(type_local_offset(i)); |
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1924 } |
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1925 }; |
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1926 |
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1927 // MethodData* |
0 | 1928 // |
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1929 // A MethodData* holds information which has been collected about |
0 | 1930 // a method. Its layout looks like this: |
1931 // | |
1932 // ----------------------------- | |
1933 // | header | | |
1934 // | klass | | |
1935 // ----------------------------- | |
1936 // | method | | |
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1937 // | size of the MethodData* | |
0 | 1938 // ----------------------------- |
1939 // | Data entries... | | |
1940 // | (variable size) | | |
1941 // | | | |
1942 // . . | |
1943 // . . | |
1944 // . . | |
1945 // | | | |
1946 // ----------------------------- | |
1947 // | |
1948 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1949 // DataLayout in the array corresponds to a specific bytecode in the | |
1950 // method. The entries in the array are sorted by the corresponding | |
1951 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1952 // which point to the underlying blocks of DataLayout structures. | |
1953 // | |
1954 // During interpretation, if profiling in enabled, the interpreter | |
1955 // maintains a method data pointer (mdp), which points at the entry | |
1956 // in the array corresponding to the current bci. In the course of | |
1957 // intepretation, when a bytecode is encountered that has profile data | |
1958 // associated with it, the entry pointed to by mdp is updated, then the | |
1959 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1960 // is NULL to begin with, the interpreter assumes that the current method | |
1961 // is not (yet) being profiled. | |
1962 // | |
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1963 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1964 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1965 // from the base of the data entry array. A "displacement" is the byte offset | |
1966 // in certain ProfileData objects that indicate the amount the mdp must be | |
1967 // adjusted in the event of a change in control flow. | |
1968 // | |
1969 | |
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1970 CC_INTERP_ONLY(class BytecodeInterpreter;) |
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1971 |
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1972 class MethodData : public Metadata { |
0 | 1973 friend class VMStructs; |
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1974 CC_INTERP_ONLY(friend class BytecodeInterpreter;) |
0 | 1975 private: |
1976 friend class ProfileData; | |
1977 | |
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1978 // Back pointer to the Method* |
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1979 Method* _method; |
0 | 1980 |
1981 // Size of this oop in bytes | |
1982 int _size; | |
1983 | |
1984 // Cached hint for bci_to_dp and bci_to_data | |
1985 int _hint_di; | |
1986 | |
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1987 MethodData(methodHandle method, int size, TRAPS); |
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1988 public: |
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1989 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1990 MethodData() {}; // For ciMethodData |
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1991 |
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1992 bool is_methodData() const volatile { return true; } |
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1993 |
0 | 1994 // Whole-method sticky bits and flags |
1995 enum { | |
3345 | 1996 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1997 _trap_hist_mask = max_jubyte, |
1998 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1999 }; // Public flag values | |
2000 private: | |
2001 uint _nof_decompiles; // count of all nmethod removals | |
2002 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
2003 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
2004 union { | |
2005 intptr_t _align; | |
2006 u1 _array[_trap_hist_limit]; | |
2007 } _trap_hist; | |
2008 | |
2009 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2010 intx _eflags; // flags on escape information | |
2011 intx _arg_local; // bit set of non-escaping arguments | |
2012 intx _arg_stack; // bit set of stack-allocatable arguments | |
2013 intx _arg_returned; // bit set of returned arguments | |
2014 | |
1783 | 2015 int _creation_mileage; // method mileage at MDO creation |
2016 | |
2017 // How many invocations has this MDO seen? | |
2018 // These counters are used to determine the exact age of MDO. | |
2019 // We need those because in tiered a method can be concurrently | |
2020 // executed at different levels. | |
2021 InvocationCounter _invocation_counter; | |
2022 // Same for backedges. | |
2023 InvocationCounter _backedge_counter; | |
2252 | 2024 // Counter values at the time profiling started. |
2025 int _invocation_counter_start; | |
2026 int _backedge_counter_start; | |
1783 | 2027 // Number of loops and blocks is computed when compiling the first |
2028 // time with C1. It is used to determine if method is trivial. | |
2029 short _num_loops; | |
2030 short _num_blocks; | |
2031 // Highest compile level this method has ever seen. | |
2032 u1 _highest_comp_level; | |
2033 // Same for OSR level | |
2034 u1 _highest_osr_comp_level; | |
2035 // Does this method contain anything worth profiling? | |
2036 bool _would_profile; | |
0 | 2037 |
2038 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
2039 int _data_size; | |
2040 | |
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2041 // data index for the area dedicated to parameters. -1 if no |
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2042 // parameter profiling. |
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2043 int _parameters_type_data_di; |
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2044 |
0 | 2045 // Beginning of the data entries |
2046 intptr_t _data[1]; | |
2047 | |
2048 // Helper for size computation | |
2049 static int compute_data_size(BytecodeStream* stream); | |
2050 static int bytecode_cell_count(Bytecodes::Code code); | |
2051 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
2052 | |
2053 // Helper for initialization | |
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2054 DataLayout* data_layout_at(int data_index) const { |
0 | 2055 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
2056 return (DataLayout*) (((address)_data) + data_index); | |
2057 } | |
2058 | |
2059 // Initialize an individual data segment. Returns the size of | |
2060 // the segment in bytes. | |
2061 int initialize_data(BytecodeStream* stream, int data_index); | |
2062 | |
2063 // Helper for data_at | |
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2064 DataLayout* limit_data_position() const { |
0 | 2065 return (DataLayout*)((address)data_base() + _data_size); |
2066 } | |
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2067 bool out_of_bounds(int data_index) const { |
0 | 2068 return data_index >= data_size(); |
2069 } | |
2070 | |
2071 // Give each of the data entries a chance to perform specific | |
2072 // data initialization. | |
2073 void post_initialize(BytecodeStream* stream); | |
2074 | |
2075 // hint accessors | |
2076 int hint_di() const { return _hint_di; } | |
2077 void set_hint_di(int di) { | |
2078 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
2079 _hint_di = di; | |
2080 } | |
2081 ProfileData* data_before(int bci) { | |
2082 // avoid SEGV on this edge case | |
2083 if (data_size() == 0) | |
2084 return NULL; | |
2085 int hint = hint_di(); | |
2086 if (data_layout_at(hint)->bci() <= bci) | |
2087 return data_at(hint); | |
2088 return first_data(); | |
2089 } | |
2090 | |
2091 // What is the index of the first data entry? | |
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2092 int first_di() const { return 0; } |
0 | 2093 |
2094 // Find or create an extra ProfileData: | |
2095 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
2096 | |
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2097 // return the argument info cell |
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2098 ArgInfoData *arg_info(); |
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2099 |
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2100 enum { |
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2101 no_type_profile = 0, |
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2102 type_profile_jsr292 = 1, |
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2103 type_profile_all = 2 |
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2104 }; |
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2105 |
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2106 static bool profile_jsr292(methodHandle m, int bci); |
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2107 static int profile_arguments_flag(); |
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2108 static bool profile_arguments_jsr292_only(); |
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2109 static bool profile_all_arguments(); |
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2110 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2111 static int profile_return_flag(); |
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2112 static bool profile_all_return(); |
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2113 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2114 static int profile_parameters_flag(); |
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2115 static bool profile_parameters_jsr292_only(); |
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2116 static bool profile_all_parameters(); |
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2117 |
0 | 2118 public: |
2119 static int header_size() { | |
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2120 return sizeof(MethodData)/wordSize; |
0 | 2121 } |
2122 | |
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2123 // Compute the size of a MethodData* before it is created. |
0 | 2124 static int compute_allocation_size_in_bytes(methodHandle method); |
2125 static int compute_allocation_size_in_words(methodHandle method); | |
2126 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
2127 | |
2128 // Determine if a given bytecode can have profile information. | |
2129 static bool bytecode_has_profile(Bytecodes::Code code) { | |
2130 return bytecode_cell_count(code) != no_profile_data; | |
2131 } | |
2132 | |
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2133 // reset into original state |
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2134 void init(); |
0 | 2135 |
2136 // My size | |
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2137 int size_in_bytes() const { return _size; } |
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2138 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 2139 #if INCLUDE_SERVICES |
2140 void collect_statistics(KlassSizeStats *sz) const; | |
2141 #endif | |
0 | 2142 |
2143 int creation_mileage() const { return _creation_mileage; } | |
2144 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 2145 |
2146 int invocation_count() { | |
2147 if (invocation_counter()->carry()) { | |
2148 return InvocationCounter::count_limit; | |
2149 } | |
2150 return invocation_counter()->count(); | |
2151 } | |
2152 int backedge_count() { | |
2153 if (backedge_counter()->carry()) { | |
2154 return InvocationCounter::count_limit; | |
2155 } | |
2156 return backedge_counter()->count(); | |
2157 } | |
2158 | |
2252 | 2159 int invocation_count_start() { |
2160 if (invocation_counter()->carry()) { | |
2161 return 0; | |
2162 } | |
2163 return _invocation_counter_start; | |
2164 } | |
2165 | |
2166 int backedge_count_start() { | |
2167 if (backedge_counter()->carry()) { | |
2168 return 0; | |
2169 } | |
2170 return _backedge_counter_start; | |
2171 } | |
2172 | |
2173 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
2174 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
2175 | |
2176 void reset_start_counters() { | |
2177 _invocation_counter_start = invocation_count(); | |
2178 _backedge_counter_start = backedge_count(); | |
2179 } | |
2180 | |
1783 | 2181 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
2182 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
2183 | |
2184 void set_would_profile(bool p) { _would_profile = p; } | |
2185 bool would_profile() const { return _would_profile; } | |
2186 | |
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2187 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 2188 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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2189 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2190 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2191 | |
2192 int num_loops() const { return _num_loops; } | |
2193 void set_num_loops(int n) { _num_loops = n; } | |
2194 int num_blocks() const { return _num_blocks; } | |
2195 void set_num_blocks(int n) { _num_blocks = n; } | |
2196 | |
0 | 2197 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2198 static int mileage_of(Method* m); |
0 | 2199 |
2200 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2201 enum EscapeFlag { | |
2202 estimated = 1 << 0, | |
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2203 return_local = 1 << 1, |
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2204 return_allocated = 1 << 2, |
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2205 allocated_escapes = 1 << 3, |
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2206 unknown_modified = 1 << 4 |
0 | 2207 }; |
2208 | |
2209 intx eflags() { return _eflags; } | |
2210 intx arg_local() { return _arg_local; } | |
2211 intx arg_stack() { return _arg_stack; } | |
2212 intx arg_returned() { return _arg_returned; } | |
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2213 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2214 assert(aid != NULL, "arg_info must be not null"); |
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2215 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2216 return aid->arg_modified(a); } |
0 | 2217 |
2218 void set_eflags(intx v) { _eflags = v; } | |
2219 void set_arg_local(intx v) { _arg_local = v; } | |
2220 void set_arg_stack(intx v) { _arg_stack = v; } | |
2221 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2222 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2223 assert(aid != NULL, "arg_info must be not null"); |
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2224 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2225 aid->set_arg_modified(a, v); } |
0 | 2226 |
2227 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2228 | |
2229 // Location and size of data area | |
2230 address data_base() const { | |
2231 return (address) _data; | |
2232 } | |
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2233 int data_size() const { |
0 | 2234 return _data_size; |
2235 } | |
2236 | |
2237 // Accessors | |
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2238 Method* method() const { return _method; } |
0 | 2239 |
2240 // Get the data at an arbitrary (sort of) data index. | |
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2241 ProfileData* data_at(int data_index) const; |
0 | 2242 |
2243 // Walk through the data in order. | |
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2244 ProfileData* first_data() const { return data_at(first_di()); } |
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2245 ProfileData* next_data(ProfileData* current) const; |
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2246 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2247 |
2248 // Convert a dp (data pointer) to a di (data index). | |
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2249 int dp_to_di(address dp) const { |
0 | 2250 return dp - ((address)_data); |
2251 } | |
2252 | |
2253 address di_to_dp(int di) { | |
2254 return (address)data_layout_at(di); | |
2255 } | |
2256 | |
2257 // bci to di/dp conversion. | |
2258 address bci_to_dp(int bci); | |
2259 int bci_to_di(int bci) { | |
2260 return dp_to_di(bci_to_dp(bci)); | |
2261 } | |
2262 | |
2263 // Get the data at an arbitrary bci, or NULL if there is none. | |
2264 ProfileData* bci_to_data(int bci); | |
2265 | |
2266 // Same, but try to create an extra_data record if one is needed: | |
2267 ProfileData* allocate_bci_to_data(int bci) { | |
2268 ProfileData* data = bci_to_data(bci); | |
2269 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
2270 } | |
2271 | |
2272 // Add a handful of extra data records, for trap tracking. | |
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2273 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2274 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2275 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2276 - (address)extra_data_base(); } |
2277 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
2278 | |
2279 // Return (uint)-1 for overflow. | |
2280 uint trap_count(int reason) const { | |
2281 assert((uint)reason < _trap_hist_limit, "oob"); | |
2282 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2283 } | |
2284 // For loops: | |
2285 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2286 static uint trap_count_limit() { return _trap_hist_mask; } | |
2287 uint inc_trap_count(int reason) { | |
2288 // Count another trap, anywhere in this method. | |
2289 assert(reason >= 0, "must be single trap"); | |
2290 if ((uint)reason < _trap_hist_limit) { | |
2291 uint cnt1 = 1 + _trap_hist._array[reason]; | |
2292 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
2293 _trap_hist._array[reason] = cnt1; | |
2294 return cnt1; | |
2295 } else { | |
2296 return _trap_hist_mask + (++_nof_overflow_traps); | |
2297 } | |
2298 } else { | |
2299 // Could not represent the count in the histogram. | |
2300 return (++_nof_overflow_traps); | |
2301 } | |
2302 } | |
2303 | |
2304 uint overflow_trap_count() const { | |
2305 return _nof_overflow_traps; | |
2306 } | |
2307 uint overflow_recompile_count() const { | |
2308 return _nof_overflow_recompiles; | |
2309 } | |
2310 void inc_overflow_recompile_count() { | |
2311 _nof_overflow_recompiles += 1; | |
2312 } | |
2313 uint decompile_count() const { | |
2314 return _nof_decompiles; | |
2315 } | |
2316 void inc_decompile_count() { | |
2317 _nof_decompiles += 1; | |
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2318 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2319 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2320 } |
0 | 2321 } |
2322 | |
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2323 // Return pointer to area dedicated to parameters in MDO |
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2324 ParametersTypeData* parameters_type_data() const { |
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2325 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2326 } |
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2327 |
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2328 int parameters_type_data_di() const { |
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2329 assert(_parameters_type_data_di != -1, "no args type data"); |
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2330 return _parameters_type_data_di; |
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2331 } |
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2332 |
0 | 2333 // Support for code generation |
2334 static ByteSize data_offset() { | |
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2335 return byte_offset_of(MethodData, _data[0]); |
0 | 2336 } |
2337 | |
1783 | 2338 static ByteSize invocation_counter_offset() { |
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2339 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2340 } |
2341 static ByteSize backedge_counter_offset() { | |
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2342 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2343 } |
2344 | |
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2345 static ByteSize parameters_type_data_di_offset() { |
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2346 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2347 } |
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2348 |
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2349 // Deallocation support - no pointer fields to deallocate |
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2350 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2351 |
0 | 2352 // GC support |
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2353 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2354 |
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2355 // Printing |
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2356 #ifndef PRODUCT |
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2357 void print_on (outputStream* st) const; |
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2358 #endif |
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2359 void print_value_on(outputStream* st) const; |
0 | 2360 |
2361 #ifndef PRODUCT | |
2362 // printing support for method data | |
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2363 void print_data_on(outputStream* st) const; |
0 | 2364 #endif |
2365 | |
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2366 const char* internal_name() const { return "{method data}"; } |
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2367 |
0 | 2368 // verification |
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2369 void verify_on(outputStream* st); |
0 | 2370 void verify_data_on(outputStream* st); |
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2371 |
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2372 static bool profile_parameters_for_method(methodHandle m); |
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2373 static bool profile_arguments(); |
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2374 static bool profile_return(); |
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2375 static bool profile_parameters(); |
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2376 static bool profile_return_jsr292_only(); |
0 | 2377 }; |
1972 | 2378 |
2379 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |