Mercurial > hg > truffle
annotate src/share/vm/code/codeBlob.hpp @ 1355:6ccd32c284ac
Merge
author | kamg |
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date | Wed, 07 Apr 2010 12:28:22 -0400 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright 1998-2010 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
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 | |
38 // - instruction space | |
39 // - data space | |
40 class DeoptimizationBlob; | |
41 | |
42 class CodeBlob VALUE_OBJ_CLASS_SPEC { | |
43 | |
44 friend class VMStructs; | |
45 | |
46 private: | |
47 const char* _name; | |
48 int _size; // total size of CodeBlob in bytes | |
49 int _header_size; // size of header (depends on subclass) | |
50 int _relocation_size; // size of relocation | |
51 int _instructions_offset; // offset to where instructions region begins | |
52 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have | |
53 // not finished setting up their frame. Beware of pc's in | |
54 // that range. There is a similar range(s) on returns | |
55 // which we don't detect. | |
56 int _data_offset; // offset to where data region begins | |
57 int _oops_offset; // offset to where embedded oop table begins (inside data) | |
58 int _oops_length; // number of embedded oops | |
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 void fix_oop_relocations(address begin, address end, bool initialize_immediates); | |
66 inline void initialize_immediate_oop(oop* dest, jobject handle); | |
67 | |
68 public: | |
69 // Returns the space needed for CodeBlob | |
70 static unsigned int allocation_size(CodeBuffer* cb, int header_size); | |
71 | |
72 // Creation | |
73 // a) simple CodeBlob | |
74 // frame_complete is the offset from the beginning of the instructions | |
75 // to where the frame setup (from stackwalk viewpoint) is complete. | |
76 CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size); | |
77 | |
78 // b) full CodeBlob | |
79 CodeBlob( | |
80 const char* name, | |
81 CodeBuffer* cb, | |
82 int header_size, | |
83 int size, | |
84 int frame_complete, | |
85 int frame_size, | |
86 OopMapSet* oop_maps | |
87 ); | |
88 | |
89 // Deletion | |
90 void flush(); | |
91 | |
92 // Typing | |
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93 virtual bool is_buffer_blob() const { return false; } |
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94 virtual bool is_nmethod() const { return false; } |
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95 virtual bool is_runtime_stub() const { return false; } |
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96 virtual bool is_deoptimization_stub() const { return false; } |
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97 virtual bool is_uncommon_trap_stub() const { return false; } |
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98 virtual bool is_exception_stub() const { return false; } |
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99 virtual bool is_safepoint_stub() const { return false; } |
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100 virtual bool is_adapter_blob() const { return false; } |
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101 virtual bool is_method_handles_adapter_blob() const { return false; } |
0 | 102 |
103 virtual bool is_compiled_by_c2() const { return false; } | |
104 virtual bool is_compiled_by_c1() const { return false; } | |
105 | |
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106 // Casting |
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107 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; } |
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108 |
0 | 109 // Boundaries |
110 address header_begin() const { return (address) this; } | |
111 address header_end() const { return ((address) this) + _header_size; }; | |
112 relocInfo* relocation_begin() const { return (relocInfo*) header_end(); }; | |
113 relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } | |
114 address instructions_begin() const { return (address) header_begin() + _instructions_offset; } | |
115 address instructions_end() const { return (address) header_begin() + _data_offset; } | |
116 address data_begin() const { return (address) header_begin() + _data_offset; } | |
117 address data_end() const { return (address) header_begin() + _size; } | |
118 oop* oops_begin() const { return (oop*) (header_begin() + _oops_offset); } | |
119 oop* oops_end() const { return oops_begin() + _oops_length; } | |
120 | |
121 // Offsets | |
122 int relocation_offset() const { return _header_size; } | |
123 int instructions_offset() const { return _instructions_offset; } | |
124 int data_offset() const { return _data_offset; } | |
125 int oops_offset() const { return _oops_offset; } | |
126 | |
127 // Sizes | |
128 int size() const { return _size; } | |
129 int header_size() const { return _header_size; } | |
130 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); } | |
131 int instructions_size() const { return instructions_end() - instructions_begin(); } | |
132 int data_size() const { return data_end() - data_begin(); } | |
133 int oops_size() const { return (address) oops_end() - (address) oops_begin(); } | |
134 | |
135 // Containment | |
136 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } | |
137 bool relocation_contains(relocInfo* addr) const{ return relocation_begin() <= addr && addr < relocation_end(); } | |
138 bool instructions_contains(address addr) const { return instructions_begin() <= addr && addr < instructions_end(); } | |
139 bool data_contains(address addr) const { return data_begin() <= addr && addr < data_end(); } | |
140 bool oops_contains(oop* addr) const { return oops_begin() <= addr && addr < oops_end(); } | |
141 bool contains(address addr) const { return instructions_contains(addr); } | |
142 bool is_frame_complete_at(address addr) const { return instructions_contains(addr) && | |
143 addr >= instructions_begin() + _frame_complete_offset; } | |
144 | |
145 // Relocation support | |
146 void fix_oop_relocations(address begin, address end) { | |
147 fix_oop_relocations(begin, end, false); | |
148 } | |
149 void fix_oop_relocations() { | |
150 fix_oop_relocations(NULL, NULL, false); | |
151 } | |
152 relocInfo::relocType reloc_type_for_address(address pc); | |
153 bool is_at_poll_return(address pc); | |
154 bool is_at_poll_or_poll_return(address pc); | |
155 | |
156 // Support for oops in scopes and relocs: | |
157 // Note: index 0 is reserved for null. | |
158 oop oop_at(int index) const { return index == 0? (oop)NULL: *oop_addr_at(index); } | |
159 oop* oop_addr_at(int index) const{ // for GC | |
160 // relocation indexes are biased by 1 (because 0 is reserved) | |
161 assert(index > 0 && index <= _oops_length, "must be a valid non-zero index"); | |
162 return &oops_begin()[index-1]; | |
163 } | |
164 | |
165 void copy_oops(GrowableArray<jobject>* oops); | |
166 | |
167 // CodeCache support: really only used by the nmethods, but in order to get | |
168 // asserts and certain bookkeeping to work in the CodeCache they are defined | |
169 // virtual here. | |
170 virtual bool is_zombie() const { return false; } | |
171 virtual bool is_locked_by_vm() const { return false; } | |
172 | |
173 virtual bool is_unloaded() const { return false; } | |
174 virtual bool is_not_entrant() const { return false; } | |
175 | |
176 // GC support | |
177 virtual bool is_alive() const = 0; | |
178 virtual void do_unloading(BoolObjectClosure* is_alive, | |
179 OopClosure* keep_alive, | |
180 bool unloading_occurred); | |
181 virtual void oops_do(OopClosure* f) = 0; | |
989 | 182 // (All CodeBlob subtypes other than NMethod currently have |
183 // an empty oops_do() method. | |
0 | 184 |
185 // OopMap for frame | |
186 OopMapSet* oop_maps() const { return _oop_maps; } | |
187 void set_oop_maps(OopMapSet* p); | |
188 OopMap* oop_map_for_return_address(address return_address); | |
189 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); } | |
190 | |
191 // Frame support | |
192 int frame_size() const { return _frame_size; } | |
193 void set_frame_size(int size) { _frame_size = size; } | |
194 | |
195 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments | |
196 virtual bool caller_must_gc_arguments(JavaThread* thread) const { return false; } | |
197 | |
198 // Naming | |
199 const char* name() const { return _name; } | |
200 void set_name(const char* name) { _name = name; } | |
201 | |
202 // Debugging | |
203 virtual void verify(); | |
204 virtual void print() const PRODUCT_RETURN; | |
205 virtual void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
206 | |
207 // Print the comment associated with offset on stream, if there is one | |
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208 virtual void print_block_comment(outputStream* stream, address block_begin) { |
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209 intptr_t offset = (intptr_t)(block_begin - instructions_begin()); |
0 | 210 _comments.print_block_comment(stream, offset); |
211 } | |
212 | |
213 // Transfer ownership of comments to this CodeBlob | |
214 void set_comments(CodeComments& comments) { | |
215 _comments.assign(comments); | |
216 } | |
217 }; | |
218 | |
219 | |
220 //---------------------------------------------------------------------------------------------------- | |
221 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc. | |
222 | |
223 class BufferBlob: public CodeBlob { | |
224 friend class VMStructs; | |
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225 friend class AdapterBlob; |
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226 friend class MethodHandlesAdapterBlob; |
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227 |
0 | 228 private: |
229 // Creation support | |
230 BufferBlob(const char* name, int size); | |
231 BufferBlob(const char* name, int size, CodeBuffer* cb); | |
232 | |
233 void* operator new(size_t s, unsigned size); | |
234 | |
235 public: | |
236 // Creation | |
237 static BufferBlob* create(const char* name, int buffer_size); | |
238 static BufferBlob* create(const char* name, CodeBuffer* cb); | |
239 | |
240 static void free(BufferBlob* buf); | |
241 | |
242 // Typing | |
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243 virtual bool is_buffer_blob() const { return true; } |
0 | 244 |
245 // GC/Verification support | |
246 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
247 bool is_alive() const { return true; } | |
248 void do_unloading(BoolObjectClosure* is_alive, | |
249 OopClosure* keep_alive, | |
250 bool unloading_occurred) { /* do nothing */ } | |
251 | |
252 void oops_do(OopClosure* f) { /* do nothing*/ } | |
253 | |
254 void verify(); | |
255 void print() const PRODUCT_RETURN; | |
256 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
257 }; | |
258 | |
259 | |
260 //---------------------------------------------------------------------------------------------------- | |
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261 // AdapterBlob: used to hold C2I/I2C adapters |
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262 |
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263 class AdapterBlob: public BufferBlob { |
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264 private: |
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265 AdapterBlob(int size) : BufferBlob("I2C/C2I adapters", size) {} |
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266 AdapterBlob(int size, CodeBuffer* cb) : BufferBlob("I2C/C2I adapters", size, cb) {} |
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267 |
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268 public: |
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269 // Creation |
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270 static AdapterBlob* create(CodeBuffer* cb); |
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271 |
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272 // Typing |
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273 virtual bool is_adapter_blob() const { return true; } |
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274 }; |
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275 |
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276 |
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277 //---------------------------------------------------------------------------------------------------- |
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278 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters |
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279 |
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280 class MethodHandlesAdapterBlob: public BufferBlob { |
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281 private: |
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282 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {} |
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283 MethodHandlesAdapterBlob(int size, CodeBuffer* cb) : BufferBlob("MethodHandles adapters", size, cb) {} |
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284 |
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285 public: |
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286 // Creation |
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287 static MethodHandlesAdapterBlob* create(int buffer_size); |
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288 |
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289 // Typing |
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290 virtual bool is_method_handles_adapter_blob() const { return true; } |
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291 }; |
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292 |
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293 |
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294 //---------------------------------------------------------------------------------------------------- |
0 | 295 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine |
296 | |
297 class RuntimeStub: public CodeBlob { | |
298 friend class VMStructs; | |
299 private: | |
300 bool _caller_must_gc_arguments; | |
301 | |
302 // Creation support | |
303 RuntimeStub( | |
304 const char* name, | |
305 CodeBuffer* cb, | |
306 int size, | |
307 int frame_complete, | |
308 int frame_size, | |
309 OopMapSet* oop_maps, | |
310 bool caller_must_gc_arguments | |
311 ); | |
312 | |
313 void* operator new(size_t s, unsigned size); | |
314 | |
315 public: | |
316 // Creation | |
317 static RuntimeStub* new_runtime_stub( | |
318 const char* stub_name, | |
319 CodeBuffer* cb, | |
320 int frame_complete, | |
321 int frame_size, | |
322 OopMapSet* oop_maps, | |
323 bool caller_must_gc_arguments | |
324 ); | |
325 | |
326 // Typing | |
327 bool is_runtime_stub() const { return true; } | |
328 | |
329 // GC support | |
330 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } | |
331 | |
332 address entry_point() { return instructions_begin(); } | |
333 | |
334 // GC/Verification support | |
335 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } | |
336 bool is_alive() const { return true; } | |
337 void do_unloading(BoolObjectClosure* is_alive, | |
338 OopClosure* keep_alive, | |
339 bool unloading_occurred) { /* do nothing */ } | |
340 void oops_do(OopClosure* f) { /* do-nothing*/ } | |
341 | |
342 void verify(); | |
343 void print() const PRODUCT_RETURN; | |
344 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
345 }; | |
346 | |
347 | |
348 //---------------------------------------------------------------------------------------------------- | |
349 // Super-class for all blobs that exist in only one instance. Implements default behaviour. | |
350 | |
351 class SingletonBlob: public CodeBlob { | |
352 friend class VMStructs; | |
353 public: | |
354 SingletonBlob( | |
355 const char* name, | |
356 CodeBuffer* cb, | |
357 int header_size, | |
358 int size, | |
359 int frame_size, | |
360 OopMapSet* oop_maps | |
361 ) | |
362 : CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps) | |
363 {}; | |
364 | |
365 bool is_alive() const { return true; } | |
366 void do_unloading(BoolObjectClosure* is_alive, | |
367 OopClosure* keep_alive, | |
368 bool unloading_occurred) { /* do-nothing*/ } | |
369 | |
370 void verify(); // does nothing | |
371 void print() const PRODUCT_RETURN; | |
372 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
373 }; | |
374 | |
375 | |
376 //---------------------------------------------------------------------------------------------------- | |
377 // DeoptimizationBlob | |
378 | |
379 class DeoptimizationBlob: public SingletonBlob { | |
380 friend class VMStructs; | |
381 private: | |
382 int _unpack_offset; | |
383 int _unpack_with_exception; | |
384 int _unpack_with_reexecution; | |
385 | |
386 int _unpack_with_exception_in_tls; | |
387 | |
388 // Creation support | |
389 DeoptimizationBlob( | |
390 CodeBuffer* cb, | |
391 int size, | |
392 OopMapSet* oop_maps, | |
393 int unpack_offset, | |
394 int unpack_with_exception_offset, | |
395 int unpack_with_reexecution_offset, | |
396 int frame_size | |
397 ); | |
398 | |
399 void* operator new(size_t s, unsigned size); | |
400 | |
401 public: | |
402 // Creation | |
403 static DeoptimizationBlob* create( | |
404 CodeBuffer* cb, | |
405 OopMapSet* oop_maps, | |
406 int unpack_offset, | |
407 int unpack_with_exception_offset, | |
408 int unpack_with_reexecution_offset, | |
409 int frame_size | |
410 ); | |
411 | |
412 // Typing | |
413 bool is_deoptimization_stub() const { return true; } | |
414 const DeoptimizationBlob *as_deoptimization_stub() const { return this; } | |
415 bool exception_address_is_unpack_entry(address pc) const { | |
416 address unpack_pc = unpack(); | |
417 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc); | |
418 } | |
419 | |
420 | |
421 | |
422 | |
423 // GC for args | |
424 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ } | |
425 | |
426 // Iteration | |
427 void oops_do(OopClosure* f) {} | |
428 | |
429 // Printing | |
430 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
431 | |
432 address unpack() const { return instructions_begin() + _unpack_offset; } | |
433 address unpack_with_exception() const { return instructions_begin() + _unpack_with_exception; } | |
434 address unpack_with_reexecution() const { return instructions_begin() + _unpack_with_reexecution; } | |
435 | |
436 // Alternate entry point for C1 where the exception and issuing pc | |
437 // are in JavaThread::_exception_oop and JavaThread::_exception_pc | |
438 // instead of being in registers. This is needed because C1 doesn't | |
439 // model exception paths in a way that keeps these registers free so | |
440 // there may be live values in those registers during deopt. | |
441 void set_unpack_with_exception_in_tls_offset(int offset) { | |
442 _unpack_with_exception_in_tls = offset; | |
443 assert(contains(instructions_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); | |
444 } | |
445 address unpack_with_exception_in_tls() const { return instructions_begin() + _unpack_with_exception_in_tls; } | |
446 }; | |
447 | |
448 | |
449 //---------------------------------------------------------------------------------------------------- | |
450 // UncommonTrapBlob (currently only used by Compiler 2) | |
451 | |
452 #ifdef COMPILER2 | |
453 | |
454 class UncommonTrapBlob: public SingletonBlob { | |
455 friend class VMStructs; | |
456 private: | |
457 // Creation support | |
458 UncommonTrapBlob( | |
459 CodeBuffer* cb, | |
460 int size, | |
461 OopMapSet* oop_maps, | |
462 int frame_size | |
463 ); | |
464 | |
465 void* operator new(size_t s, unsigned size); | |
466 | |
467 public: | |
468 // Creation | |
469 static UncommonTrapBlob* create( | |
470 CodeBuffer* cb, | |
471 OopMapSet* oop_maps, | |
472 int frame_size | |
473 ); | |
474 | |
475 // GC for args | |
476 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } | |
477 | |
478 // Typing | |
479 bool is_uncommon_trap_stub() const { return true; } | |
480 | |
481 // Iteration | |
482 void oops_do(OopClosure* f) {} | |
483 }; | |
484 | |
485 | |
486 //---------------------------------------------------------------------------------------------------- | |
487 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) | |
488 | |
489 class ExceptionBlob: public SingletonBlob { | |
490 friend class VMStructs; | |
491 private: | |
492 // Creation support | |
493 ExceptionBlob( | |
494 CodeBuffer* cb, | |
495 int size, | |
496 OopMapSet* oop_maps, | |
497 int frame_size | |
498 ); | |
499 | |
500 void* operator new(size_t s, unsigned size); | |
501 | |
502 public: | |
503 // Creation | |
504 static ExceptionBlob* create( | |
505 CodeBuffer* cb, | |
506 OopMapSet* oop_maps, | |
507 int frame_size | |
508 ); | |
509 | |
510 // GC for args | |
511 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
512 | |
513 // Typing | |
514 bool is_exception_stub() const { return true; } | |
515 | |
516 // Iteration | |
517 void oops_do(OopClosure* f) {} | |
518 }; | |
519 #endif // COMPILER2 | |
520 | |
521 | |
522 //---------------------------------------------------------------------------------------------------- | |
523 // SafepointBlob: handles illegal_instruction exceptions during a safepoint | |
524 | |
525 class SafepointBlob: public SingletonBlob { | |
526 friend class VMStructs; | |
527 private: | |
528 // Creation support | |
529 SafepointBlob( | |
530 CodeBuffer* cb, | |
531 int size, | |
532 OopMapSet* oop_maps, | |
533 int frame_size | |
534 ); | |
535 | |
536 void* operator new(size_t s, unsigned size); | |
537 | |
538 public: | |
539 // Creation | |
540 static SafepointBlob* create( | |
541 CodeBuffer* cb, | |
542 OopMapSet* oop_maps, | |
543 int frame_size | |
544 ); | |
545 | |
546 // GC for args | |
547 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
548 | |
549 // Typing | |
550 bool is_safepoint_stub() const { return true; } | |
551 | |
552 // Iteration | |
553 void oops_do(OopClosure* f) {} | |
554 }; |