Mercurial > hg > truffle
annotate src/share/vm/code/codeBlob.hpp @ 1937:4853c5cad3aa
More deoptmization tracing.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Thu, 23 Dec 2010 22:14:31 +0100 |
parents | 3e8fbc61cee8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2010, 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 | |
25 // CodeBlob - superclass for all entries in the CodeCache. | |
26 // | |
27 // Suptypes are: | |
28 // nmethod : Compiled Java methods (include method that calls to native code) | |
29 // RuntimeStub : Call to VM runtime methods | |
30 // DeoptimizationBlob : Used for deoptimizatation | |
31 // ExceptionBlob : Used for stack unrolling | |
32 // SafepointBlob : Used to handle illegal instruction exceptions | |
33 // | |
34 // | |
35 // Layout: | |
36 // - header | |
37 // - relocation | |
1748 | 38 // - content space |
39 // - instruction space | |
0 | 40 // - data space |
41 class DeoptimizationBlob; | |
42 | |
43 class CodeBlob VALUE_OBJ_CLASS_SPEC { | |
44 | |
45 friend class VMStructs; | |
46 | |
47 private: | |
48 const char* _name; | |
49 int _size; // total size of CodeBlob in bytes | |
50 int _header_size; // size of header (depends on subclass) | |
51 int _relocation_size; // size of relocation | |
1748 | 52 int _content_offset; // offset to where content region begins (this includes consts, insts, stubs) |
53 int _code_offset; // offset to where instructions region begins (this includes insts, stubs) | |
0 | 54 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have |
55 // not finished setting up their frame. Beware of pc's in | |
56 // that range. There is a similar range(s) on returns | |
57 // which we don't detect. | |
58 int _data_offset; // offset to where data region begins | |
59 int _frame_size; // size of stack frame | |
60 OopMapSet* _oop_maps; // OopMap for this CodeBlob | |
61 CodeComments _comments; | |
62 | |
63 friend class OopRecorder; | |
64 | |
65 public: | |
66 // Returns the space needed for CodeBlob | |
67 static unsigned int allocation_size(CodeBuffer* cb, int header_size); | |
68 | |
69 // Creation | |
70 // a) simple CodeBlob | |
71 // frame_complete is the offset from the beginning of the instructions | |
72 // to where the frame setup (from stackwalk viewpoint) is complete. | |
73 CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size); | |
74 | |
75 // b) full CodeBlob | |
76 CodeBlob( | |
77 const char* name, | |
78 CodeBuffer* cb, | |
79 int header_size, | |
80 int size, | |
81 int frame_complete, | |
82 int frame_size, | |
83 OopMapSet* oop_maps | |
84 ); | |
85 | |
86 // Deletion | |
87 void flush(); | |
88 | |
89 // Typing | |
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90 virtual bool is_buffer_blob() const { return false; } |
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91 virtual bool is_nmethod() const { return false; } |
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92 virtual bool is_runtime_stub() const { return false; } |
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93 virtual bool is_deoptimization_stub() const { return false; } |
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94 virtual bool is_uncommon_trap_stub() const { return false; } |
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95 virtual bool is_exception_stub() const { return false; } |
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96 virtual bool is_safepoint_stub() const { return false; } |
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97 virtual bool is_adapter_blob() const { return false; } |
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98 virtual bool is_method_handles_adapter_blob() const { return false; } |
0 | 99 |
100 virtual bool is_compiled_by_c2() const { return false; } | |
101 virtual bool is_compiled_by_c1() const { return false; } | |
102 | |
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103 // Casting |
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104 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; } |
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105 |
0 | 106 // Boundaries |
107 address header_begin() const { return (address) this; } | |
108 address header_end() const { return ((address) this) + _header_size; }; | |
109 relocInfo* relocation_begin() const { return (relocInfo*) header_end(); }; | |
110 relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } | |
1748 | 111 address content_begin() const { return (address) header_begin() + _content_offset; } |
112 address content_end() const { return (address) header_begin() + _data_offset; } | |
113 address code_begin() const { return (address) header_begin() + _code_offset; } | |
114 address code_end() const { return (address) header_begin() + _data_offset; } | |
0 | 115 address data_begin() const { return (address) header_begin() + _data_offset; } |
116 address data_end() const { return (address) header_begin() + _size; } | |
117 | |
118 // Offsets | |
119 int relocation_offset() const { return _header_size; } | |
1748 | 120 int content_offset() const { return _content_offset; } |
121 int code_offset() const { return _code_offset; } | |
0 | 122 int data_offset() const { return _data_offset; } |
123 | |
124 // Sizes | |
125 int size() const { return _size; } | |
126 int header_size() const { return _header_size; } | |
127 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); } | |
1748 | 128 int content_size() const { return content_end() - content_begin(); } |
129 int code_size() const { return code_end() - code_begin(); } | |
130 int data_size() const { return data_end() - data_begin(); } | |
0 | 131 |
132 // Containment | |
1748 | 133 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } |
0 | 134 bool relocation_contains(relocInfo* addr) const{ return relocation_begin() <= addr && addr < relocation_end(); } |
1748 | 135 bool content_contains(address addr) const { return content_begin() <= addr && addr < content_end(); } |
136 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); } | |
137 bool data_contains(address addr) const { return data_begin() <= addr && addr < data_end(); } | |
138 bool contains(address addr) const { return content_contains(addr); } | |
139 bool is_frame_complete_at(address addr) const { return code_contains(addr) && | |
140 addr >= code_begin() + _frame_complete_offset; } | |
0 | 141 |
142 // CodeCache support: really only used by the nmethods, but in order to get | |
143 // asserts and certain bookkeeping to work in the CodeCache they are defined | |
144 // virtual here. | |
145 virtual bool is_zombie() const { return false; } | |
146 virtual bool is_locked_by_vm() const { return false; } | |
147 | |
148 virtual bool is_unloaded() const { return false; } | |
149 virtual bool is_not_entrant() const { return false; } | |
150 | |
151 // GC support | |
152 virtual bool is_alive() const = 0; | |
153 | |
154 // OopMap for frame | |
155 OopMapSet* oop_maps() const { return _oop_maps; } | |
156 void set_oop_maps(OopMapSet* p); | |
157 OopMap* oop_map_for_return_address(address return_address); | |
158 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); } | |
159 | |
160 // Frame support | |
161 int frame_size() const { return _frame_size; } | |
162 void set_frame_size(int size) { _frame_size = size; } | |
163 | |
164 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments | |
165 virtual bool caller_must_gc_arguments(JavaThread* thread) const { return false; } | |
166 | |
167 // Naming | |
168 const char* name() const { return _name; } | |
169 void set_name(const char* name) { _name = name; } | |
170 | |
171 // Debugging | |
172 virtual void verify(); | |
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173 void print() const { print_on(tty); } |
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174 virtual void print_on(outputStream* st) const; |
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175 virtual void print_value_on(outputStream* st) const; |
0 | 176 |
177 // Print the comment associated with offset on stream, if there is one | |
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178 virtual void print_block_comment(outputStream* stream, address block_begin) { |
1748 | 179 intptr_t offset = (intptr_t)(block_begin - code_begin()); |
0 | 180 _comments.print_block_comment(stream, offset); |
181 } | |
182 | |
183 // Transfer ownership of comments to this CodeBlob | |
184 void set_comments(CodeComments& comments) { | |
185 _comments.assign(comments); | |
186 } | |
187 }; | |
188 | |
189 | |
190 //---------------------------------------------------------------------------------------------------- | |
191 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc. | |
192 | |
193 class BufferBlob: public CodeBlob { | |
194 friend class VMStructs; | |
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195 friend class AdapterBlob; |
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196 friend class MethodHandlesAdapterBlob; |
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197 |
0 | 198 private: |
199 // Creation support | |
200 BufferBlob(const char* name, int size); | |
201 BufferBlob(const char* name, int size, CodeBuffer* cb); | |
202 | |
203 void* operator new(size_t s, unsigned size); | |
204 | |
205 public: | |
206 // Creation | |
207 static BufferBlob* create(const char* name, int buffer_size); | |
208 static BufferBlob* create(const char* name, CodeBuffer* cb); | |
209 | |
210 static void free(BufferBlob* buf); | |
211 | |
212 // Typing | |
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213 virtual bool is_buffer_blob() const { return true; } |
0 | 214 |
215 // GC/Verification support | |
216 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
217 bool is_alive() const { return true; } | |
218 | |
219 void verify(); | |
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220 void print_on(outputStream* st) const; |
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221 void print_value_on(outputStream* st) const; |
0 | 222 }; |
223 | |
224 | |
225 //---------------------------------------------------------------------------------------------------- | |
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226 // AdapterBlob: used to hold C2I/I2C adapters |
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227 |
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228 class AdapterBlob: public BufferBlob { |
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229 private: |
1663 | 230 AdapterBlob(int size, CodeBuffer* cb); |
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231 |
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232 public: |
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233 // Creation |
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234 static AdapterBlob* create(CodeBuffer* cb); |
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235 |
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236 // Typing |
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237 virtual bool is_adapter_blob() const { return true; } |
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238 }; |
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239 |
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240 |
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241 //---------------------------------------------------------------------------------------------------- |
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242 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters |
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243 |
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244 class MethodHandlesAdapterBlob: public BufferBlob { |
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245 private: |
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246 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {} |
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247 MethodHandlesAdapterBlob(int size, CodeBuffer* cb) : BufferBlob("MethodHandles adapters", size, cb) {} |
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248 |
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249 public: |
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250 // Creation |
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251 static MethodHandlesAdapterBlob* create(int buffer_size); |
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252 |
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253 // Typing |
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254 virtual bool is_method_handles_adapter_blob() const { return true; } |
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255 }; |
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256 |
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257 |
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258 //---------------------------------------------------------------------------------------------------- |
0 | 259 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine |
260 | |
261 class RuntimeStub: public CodeBlob { | |
262 friend class VMStructs; | |
263 private: | |
264 bool _caller_must_gc_arguments; | |
265 | |
266 // Creation support | |
267 RuntimeStub( | |
268 const char* name, | |
269 CodeBuffer* cb, | |
270 int size, | |
271 int frame_complete, | |
272 int frame_size, | |
273 OopMapSet* oop_maps, | |
274 bool caller_must_gc_arguments | |
275 ); | |
276 | |
277 void* operator new(size_t s, unsigned size); | |
278 | |
279 public: | |
280 // Creation | |
281 static RuntimeStub* new_runtime_stub( | |
282 const char* stub_name, | |
283 CodeBuffer* cb, | |
284 int frame_complete, | |
285 int frame_size, | |
286 OopMapSet* oop_maps, | |
287 bool caller_must_gc_arguments | |
288 ); | |
289 | |
290 // Typing | |
291 bool is_runtime_stub() const { return true; } | |
292 | |
293 // GC support | |
294 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } | |
295 | |
1748 | 296 address entry_point() { return code_begin(); } |
0 | 297 |
298 // GC/Verification support | |
299 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } | |
300 bool is_alive() const { return true; } | |
301 | |
302 void verify(); | |
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303 void print_on(outputStream* st) const; |
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304 void print_value_on(outputStream* st) const; |
0 | 305 }; |
306 | |
307 | |
308 //---------------------------------------------------------------------------------------------------- | |
309 // Super-class for all blobs that exist in only one instance. Implements default behaviour. | |
310 | |
311 class SingletonBlob: public CodeBlob { | |
312 friend class VMStructs; | |
313 public: | |
314 SingletonBlob( | |
315 const char* name, | |
316 CodeBuffer* cb, | |
317 int header_size, | |
318 int size, | |
319 int frame_size, | |
320 OopMapSet* oop_maps | |
321 ) | |
322 : CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps) | |
1748 | 323 {}; |
0 | 324 |
1748 | 325 address entry_point() { return code_begin(); } |
0 | 326 |
1748 | 327 bool is_alive() const { return true; } |
328 | |
329 void verify(); // does nothing | |
330 void print_on(outputStream* st) const; | |
331 void print_value_on(outputStream* st) const; | |
0 | 332 }; |
333 | |
334 | |
335 //---------------------------------------------------------------------------------------------------- | |
336 // DeoptimizationBlob | |
337 | |
338 class DeoptimizationBlob: public SingletonBlob { | |
339 friend class VMStructs; | |
340 private: | |
341 int _unpack_offset; | |
342 int _unpack_with_exception; | |
343 int _unpack_with_reexecution; | |
344 | |
345 int _unpack_with_exception_in_tls; | |
346 | |
347 // Creation support | |
348 DeoptimizationBlob( | |
349 CodeBuffer* cb, | |
350 int size, | |
351 OopMapSet* oop_maps, | |
352 int unpack_offset, | |
353 int unpack_with_exception_offset, | |
354 int unpack_with_reexecution_offset, | |
355 int frame_size | |
356 ); | |
357 | |
358 void* operator new(size_t s, unsigned size); | |
359 | |
360 public: | |
361 // Creation | |
362 static DeoptimizationBlob* create( | |
363 CodeBuffer* cb, | |
364 OopMapSet* oop_maps, | |
365 int unpack_offset, | |
366 int unpack_with_exception_offset, | |
367 int unpack_with_reexecution_offset, | |
368 int frame_size | |
369 ); | |
370 | |
371 // Typing | |
372 bool is_deoptimization_stub() const { return true; } | |
373 const DeoptimizationBlob *as_deoptimization_stub() const { return this; } | |
374 bool exception_address_is_unpack_entry(address pc) const { | |
375 address unpack_pc = unpack(); | |
376 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc); | |
377 } | |
378 | |
379 | |
380 | |
381 | |
382 // GC for args | |
383 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ } | |
384 | |
385 // Printing | |
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386 void print_value_on(outputStream* st) const; |
0 | 387 |
1748 | 388 address unpack() const { return code_begin() + _unpack_offset; } |
389 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; } | |
390 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; } | |
0 | 391 |
392 // Alternate entry point for C1 where the exception and issuing pc | |
393 // are in JavaThread::_exception_oop and JavaThread::_exception_pc | |
394 // instead of being in registers. This is needed because C1 doesn't | |
395 // model exception paths in a way that keeps these registers free so | |
396 // there may be live values in those registers during deopt. | |
397 void set_unpack_with_exception_in_tls_offset(int offset) { | |
398 _unpack_with_exception_in_tls = offset; | |
1748 | 399 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); |
0 | 400 } |
1748 | 401 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; } |
0 | 402 }; |
403 | |
404 | |
405 //---------------------------------------------------------------------------------------------------- | |
406 // UncommonTrapBlob (currently only used by Compiler 2) | |
407 | |
408 #ifdef COMPILER2 | |
409 | |
410 class UncommonTrapBlob: public SingletonBlob { | |
411 friend class VMStructs; | |
412 private: | |
413 // Creation support | |
414 UncommonTrapBlob( | |
415 CodeBuffer* cb, | |
416 int size, | |
417 OopMapSet* oop_maps, | |
418 int frame_size | |
419 ); | |
420 | |
421 void* operator new(size_t s, unsigned size); | |
422 | |
423 public: | |
424 // Creation | |
425 static UncommonTrapBlob* create( | |
426 CodeBuffer* cb, | |
427 OopMapSet* oop_maps, | |
428 int frame_size | |
429 ); | |
430 | |
431 // GC for args | |
432 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } | |
433 | |
434 // Typing | |
435 bool is_uncommon_trap_stub() const { return true; } | |
436 }; | |
437 | |
438 | |
439 //---------------------------------------------------------------------------------------------------- | |
440 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) | |
441 | |
442 class ExceptionBlob: public SingletonBlob { | |
443 friend class VMStructs; | |
444 private: | |
445 // Creation support | |
446 ExceptionBlob( | |
447 CodeBuffer* cb, | |
448 int size, | |
449 OopMapSet* oop_maps, | |
450 int frame_size | |
451 ); | |
452 | |
453 void* operator new(size_t s, unsigned size); | |
454 | |
455 public: | |
456 // Creation | |
457 static ExceptionBlob* create( | |
458 CodeBuffer* cb, | |
459 OopMapSet* oop_maps, | |
460 int frame_size | |
461 ); | |
462 | |
463 // GC for args | |
464 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
465 | |
466 // Typing | |
467 bool is_exception_stub() const { return true; } | |
468 }; | |
469 #endif // COMPILER2 | |
470 | |
471 | |
472 //---------------------------------------------------------------------------------------------------- | |
473 // SafepointBlob: handles illegal_instruction exceptions during a safepoint | |
474 | |
475 class SafepointBlob: public SingletonBlob { | |
476 friend class VMStructs; | |
477 private: | |
478 // Creation support | |
479 SafepointBlob( | |
480 CodeBuffer* cb, | |
481 int size, | |
482 OopMapSet* oop_maps, | |
483 int frame_size | |
484 ); | |
485 | |
486 void* operator new(size_t s, unsigned size); | |
487 | |
488 public: | |
489 // Creation | |
490 static SafepointBlob* create( | |
491 CodeBuffer* cb, | |
492 OopMapSet* oop_maps, | |
493 int frame_size | |
494 ); | |
495 | |
496 // GC for args | |
497 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
498 | |
499 // Typing | |
500 bool is_safepoint_stub() const { return true; } | |
501 }; |