Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.hpp @ 771:a77eddcd510c jdk7-b60
6843041: Remove duplicate README files in repositories (make/README)
Reviewed-by: robilad
author | ohair |
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date | Tue, 19 May 2009 17:40:10 -0700 |
parents | 98cb887364d3 |
children | 8b46c4d82093 148e5441d916 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 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 // This class is used internally by nmethods, to cache | |
26 // exception/pc/handler information. | |
27 | |
28 class ExceptionCache : public CHeapObj { | |
29 friend class VMStructs; | |
30 private: | |
31 static address _unwind_handler; | |
32 enum { cache_size = 16 }; | |
33 klassOop _exception_type; | |
34 address _pc[cache_size]; | |
35 address _handler[cache_size]; | |
36 int _count; | |
37 ExceptionCache* _next; | |
38 | |
39 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } | |
40 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } | |
41 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } | |
42 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } | |
43 int count() { return _count; } | |
44 void increment_count() { _count++; } | |
45 | |
46 public: | |
47 | |
48 ExceptionCache(Handle exception, address pc, address handler); | |
49 | |
50 klassOop exception_type() { return _exception_type; } | |
51 klassOop* exception_type_addr() { return &_exception_type; } | |
52 ExceptionCache* next() { return _next; } | |
53 void set_next(ExceptionCache *ec) { _next = ec; } | |
54 | |
55 address match(Handle exception, address pc); | |
56 bool match_exception_with_space(Handle exception) ; | |
57 address test_address(address addr); | |
58 bool add_address_and_handler(address addr, address handler) ; | |
59 | |
60 static address unwind_handler() { return _unwind_handler; } | |
61 }; | |
62 | |
63 | |
64 // cache pc descs found in earlier inquiries | |
65 class PcDescCache VALUE_OBJ_CLASS_SPEC { | |
66 friend class VMStructs; | |
67 private: | |
68 enum { cache_size = 4 }; | |
69 PcDesc* _last_pc_desc; // most recent pc_desc found | |
70 PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found | |
71 public: | |
72 PcDescCache() { debug_only(_last_pc_desc = NULL); } | |
73 void reset_to(PcDesc* initial_pc_desc); | |
74 PcDesc* find_pc_desc(int pc_offset, bool approximate); | |
75 void add_pc_desc(PcDesc* pc_desc); | |
76 PcDesc* last_pc_desc() { return _last_pc_desc; } | |
77 }; | |
78 | |
79 | |
80 // nmethods (native methods) are the compiled code versions of Java methods. | |
81 | |
82 struct nmFlags { | |
83 friend class VMStructs; | |
84 unsigned int version:8; // version number (0 = first version) | |
85 unsigned int level:4; // optimization level | |
86 unsigned int age:4; // age (in # of sweep steps) | |
87 | |
88 unsigned int state:2; // {alive, zombie, unloaded) | |
89 | |
90 unsigned int isUncommonRecompiled:1; // recompiled because of uncommon trap? | |
91 unsigned int isToBeRecompiled:1; // to be recompiled as soon as it matures | |
92 unsigned int hasFlushedDependencies:1; // Used for maintenance of dependencies | |
93 unsigned int markedForReclamation:1; // Used by NMethodSweeper | |
94 | |
95 unsigned int has_unsafe_access:1; // May fault due to unsafe access. | |
96 | |
97 void clear(); | |
98 }; | |
99 | |
100 | |
101 // A nmethod contains: | |
102 // - header (the nmethod structure) | |
103 // [Relocation] | |
104 // - relocation information | |
105 // - constant part (doubles, longs and floats used in nmethod) | |
106 // [Code] | |
107 // - code body | |
108 // - exception handler | |
109 // - stub code | |
110 // [Debugging information] | |
111 // - oop array | |
112 // - data array | |
113 // - pcs | |
114 // [Exception handler table] | |
115 // - handler entry point array | |
116 // [Implicit Null Pointer exception table] | |
117 // - implicit null table array | |
118 | |
119 class Dependencies; | |
120 class ExceptionHandlerTable; | |
121 class ImplicitExceptionTable; | |
122 class AbstractCompiler; | |
123 class xmlStream; | |
124 | |
125 class nmethod : public CodeBlob { | |
126 friend class VMStructs; | |
127 friend class NMethodSweeper; | |
128 private: | |
129 // Shared fields for all nmethod's | |
130 static int _zombie_instruction_size; | |
131 | |
132 methodOop _method; | |
133 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method | |
134 | |
135 nmethod* _link; // To support simple linked-list chaining of nmethods | |
136 | |
137 AbstractCompiler* _compiler; // The compiler which compiled this nmethod | |
138 | |
139 // Offsets for different nmethod parts | |
140 int _exception_offset; | |
141 // All deoptee's will resume execution at this location described by this offset | |
142 int _deoptimize_offset; | |
116
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143 #ifdef HAVE_DTRACE_H |
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144 int _trap_offset; |
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145 #endif // def HAVE_DTRACE_H |
0 | 146 int _stub_offset; |
147 int _consts_offset; | |
148 int _scopes_data_offset; | |
149 int _scopes_pcs_offset; | |
150 int _dependencies_offset; | |
151 int _handler_table_offset; | |
152 int _nul_chk_table_offset; | |
153 int _nmethod_end_offset; | |
154 | |
155 // location in frame (offset for sp) that deopt can store the original | |
156 // pc during a deopt. | |
157 int _orig_pc_offset; | |
158 | |
159 int _compile_id; // which compilation made this nmethod | |
160 int _comp_level; // compilation level | |
161 | |
162 // offsets for entry points | |
163 address _entry_point; // entry point with class check | |
164 address _verified_entry_point; // entry point without class check | |
165 address _osr_entry_point; // entry point for on stack replacement | |
166 | |
167 nmFlags flags; // various flags to keep track of nmethod state | |
168 bool _markedForDeoptimization; // Used for stack deoptimization | |
169 enum { alive = 0, | |
605 | 170 not_entrant = 1, // uncommon trap has happened but activations may still exist |
0 | 171 zombie = 2, |
172 unloaded = 3 }; | |
173 | |
174 // used by jvmti to track if an unload event has been posted for this nmethod. | |
175 bool _unload_reported; | |
176 | |
177 NOT_PRODUCT(bool _has_debug_info; ) | |
178 | |
179 // Nmethod Flushing lock (if non-zero, then the nmethod is not removed) | |
180 jint _lock_count; | |
181 | |
182 // not_entrant method removal. Each mark_sweep pass will update | |
183 // this mark to current sweep invocation count if it is seen on the | |
184 // stack. An not_entrant method can be removed when there is no | |
185 // more activations, i.e., when the _stack_traversal_mark is less than | |
186 // current sweep traversal index. | |
187 long _stack_traversal_mark; | |
188 | |
189 ExceptionCache *_exception_cache; | |
190 PcDescCache _pc_desc_cache; | |
191 | |
192 // These are only used for compiled synchronized native methods to | |
193 // locate the owner and stack slot for the BasicLock so that we can | |
194 // properly revoke the bias of the owner if necessary. They are | |
195 // needed because there is no debug information for compiled native | |
196 // wrappers and the oop maps are insufficient to allow | |
197 // frame::retrieve_receiver() to work. Currently they are expected | |
198 // to be byte offsets from the Java stack pointer for maximum code | |
199 // sharing between platforms. Note that currently biased locking | |
200 // will never cause Class instances to be biased but this code | |
201 // handles the static synchronized case as well. | |
202 ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
203 ByteSize _compiled_synchronized_native_basic_lock_sp_offset; | |
204 | |
205 friend class nmethodLocker; | |
206 | |
207 // For native wrappers | |
208 nmethod(methodOop method, | |
209 int nmethod_size, | |
210 CodeOffsets* offsets, | |
211 CodeBuffer *code_buffer, | |
212 int frame_size, | |
213 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
214 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
215 OopMapSet* oop_maps); | |
216 | |
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217 #ifdef HAVE_DTRACE_H |
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218 // For native wrappers |
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219 nmethod(methodOop method, |
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220 int nmethod_size, |
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221 CodeOffsets* offsets, |
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222 CodeBuffer *code_buffer, |
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223 int frame_size); |
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224 #endif // def HAVE_DTRACE_H |
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225 |
0 | 226 // Creation support |
227 nmethod(methodOop method, | |
228 int nmethod_size, | |
229 int compile_id, | |
230 int entry_bci, | |
231 CodeOffsets* offsets, | |
232 int orig_pc_offset, | |
233 DebugInformationRecorder *recorder, | |
234 Dependencies* dependencies, | |
235 CodeBuffer *code_buffer, | |
236 int frame_size, | |
237 OopMapSet* oop_maps, | |
238 ExceptionHandlerTable* handler_table, | |
239 ImplicitExceptionTable* nul_chk_table, | |
240 AbstractCompiler* compiler, | |
241 int comp_level); | |
242 | |
243 // helper methods | |
244 void* operator new(size_t size, int nmethod_size); | |
245 void check_store(); | |
246 | |
247 const char* reloc_string_for(u_char* begin, u_char* end); | |
248 void make_not_entrant_or_zombie(int state); | |
249 void inc_decompile_count(); | |
250 | |
251 // used to check that writes to nmFlags are done consistently. | |
252 static void check_safepoint() PRODUCT_RETURN; | |
253 | |
254 // Used to manipulate the exception cache | |
255 void add_exception_cache_entry(ExceptionCache* new_entry); | |
256 ExceptionCache* exception_cache_entry_for_exception(Handle exception); | |
257 | |
258 // Inform external interfaces that a compiled method has been unloaded | |
259 inline void post_compiled_method_unload(); | |
260 | |
261 public: | |
262 // create nmethod with entry_bci | |
263 static nmethod* new_nmethod(methodHandle method, | |
264 int compile_id, | |
265 int entry_bci, | |
266 CodeOffsets* offsets, | |
267 int orig_pc_offset, | |
268 DebugInformationRecorder* recorder, | |
269 Dependencies* dependencies, | |
270 CodeBuffer *code_buffer, | |
271 int frame_size, | |
272 OopMapSet* oop_maps, | |
273 ExceptionHandlerTable* handler_table, | |
274 ImplicitExceptionTable* nul_chk_table, | |
275 AbstractCompiler* compiler, | |
276 int comp_level); | |
277 | |
278 static nmethod* new_native_nmethod(methodHandle method, | |
279 CodeBuffer *code_buffer, | |
280 int vep_offset, | |
281 int frame_complete, | |
282 int frame_size, | |
283 ByteSize receiver_sp_offset, | |
284 ByteSize basic_lock_sp_offset, | |
285 OopMapSet* oop_maps); | |
286 | |
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287 #ifdef HAVE_DTRACE_H |
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288 // The method we generate for a dtrace probe has to look |
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289 // like an nmethod as far as the rest of the system is concerned |
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290 // which is somewhat unfortunate. |
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291 static nmethod* new_dtrace_nmethod(methodHandle method, |
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292 CodeBuffer *code_buffer, |
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293 int vep_offset, |
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294 int trap_offset, |
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295 int frame_complete, |
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296 int frame_size); |
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297 |
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298 int trap_offset() const { return _trap_offset; } |
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299 address trap_address() const { return code_begin() + _trap_offset; } |
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300 |
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301 #endif // def HAVE_DTRACE_H |
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302 |
0 | 303 // accessors |
304 methodOop method() const { return _method; } | |
305 AbstractCompiler* compiler() const { return _compiler; } | |
306 | |
307 #ifndef PRODUCT | |
308 bool has_debug_info() const { return _has_debug_info; } | |
309 void set_has_debug_info(bool f) { _has_debug_info = false; } | |
310 #endif // NOT PRODUCT | |
311 | |
312 // type info | |
313 bool is_nmethod() const { return true; } | |
314 bool is_java_method() const { return !method()->is_native(); } | |
315 bool is_native_method() const { return method()->is_native(); } | |
316 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
317 bool is_osr_only_method() const { return is_osr_method(); } | |
318 | |
319 bool is_compiled_by_c1() const; | |
320 bool is_compiled_by_c2() const; | |
321 | |
322 // boundaries for different parts | |
323 address code_begin () const { return _entry_point; } | |
324 address code_end () const { return header_begin() + _stub_offset ; } | |
325 address exception_begin () const { return header_begin() + _exception_offset ; } | |
326 address deopt_handler_begin() const { return header_begin() + _deoptimize_offset ; } | |
327 address stub_begin () const { return header_begin() + _stub_offset ; } | |
328 address stub_end () const { return header_begin() + _consts_offset ; } | |
329 address consts_begin () const { return header_begin() + _consts_offset ; } | |
330 address consts_end () const { return header_begin() + _scopes_data_offset ; } | |
331 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } | |
332 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } | |
333 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } | |
334 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset); } | |
335 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } | |
336 address dependencies_end () const { return header_begin() + _handler_table_offset ; } | |
337 address handler_table_begin() const { return header_begin() + _handler_table_offset ; } | |
338 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } | |
339 address nul_chk_table_begin() const { return header_begin() + _nul_chk_table_offset ; } | |
340 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } | |
341 | |
342 int code_size () const { return code_end () - code_begin (); } | |
343 int stub_size () const { return stub_end () - stub_begin (); } | |
344 int consts_size () const { return consts_end () - consts_begin (); } | |
345 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } | |
346 int scopes_pcs_size () const { return (intptr_t)scopes_pcs_end () - (intptr_t)scopes_pcs_begin (); } | |
347 int dependencies_size () const { return dependencies_end () - dependencies_begin (); } | |
348 int handler_table_size() const { return handler_table_end() - handler_table_begin(); } | |
349 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } | |
350 | |
351 int total_size () const; | |
352 | |
353 bool code_contains (address addr) const { return code_begin () <= addr && addr < code_end (); } | |
354 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } | |
355 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } | |
356 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } | |
357 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } | |
358 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } | |
359 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } | |
360 | |
361 // entry points | |
362 address entry_point() const { return _entry_point; } // normal entry point | |
363 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct | |
364 | |
365 // flag accessing and manipulation | |
366 bool is_in_use() const { return flags.state == alive; } | |
367 bool is_alive() const { return flags.state == alive || flags.state == not_entrant; } | |
368 bool is_not_entrant() const { return flags.state == not_entrant; } | |
369 bool is_zombie() const { return flags.state == zombie; } | |
370 bool is_unloaded() const { return flags.state == unloaded; } | |
371 | |
372 // Make the nmethod non entrant. The nmethod will continue to be alive. | |
373 // It is used when an uncommon trap happens. | |
374 void make_not_entrant() { make_not_entrant_or_zombie(not_entrant); } | |
375 void make_zombie() { make_not_entrant_or_zombie(zombie); } | |
376 | |
377 // used by jvmti to track if the unload event has been reported | |
378 bool unload_reported() { return _unload_reported; } | |
379 void set_unload_reported() { _unload_reported = true; } | |
380 | |
381 bool is_marked_for_deoptimization() const { return _markedForDeoptimization; } | |
382 void mark_for_deoptimization() { _markedForDeoptimization = true; } | |
383 | |
384 void make_unloaded(BoolObjectClosure* is_alive, oop cause); | |
385 | |
386 bool has_dependencies() { return dependencies_size() != 0; } | |
387 void flush_dependencies(BoolObjectClosure* is_alive); | |
388 bool has_flushed_dependencies() { return flags.hasFlushedDependencies; } | |
389 void set_has_flushed_dependencies() { | |
390 check_safepoint(); | |
391 assert(!has_flushed_dependencies(), "should only happen once"); | |
392 flags.hasFlushedDependencies = 1; | |
393 } | |
394 | |
395 bool is_marked_for_reclamation() const { return flags.markedForReclamation; } | |
396 void mark_for_reclamation() { check_safepoint(); flags.markedForReclamation = 1; } | |
397 void unmark_for_reclamation() { check_safepoint(); flags.markedForReclamation = 0; } | |
398 | |
399 bool has_unsafe_access() const { return flags.has_unsafe_access; } | |
400 void set_has_unsafe_access(bool z) { flags.has_unsafe_access = z; } | |
401 | |
402 int level() const { return flags.level; } | |
403 void set_level(int newLevel) { check_safepoint(); flags.level = newLevel; } | |
404 | |
405 int comp_level() const { return _comp_level; } | |
406 | |
407 int version() const { return flags.version; } | |
408 void set_version(int v); | |
409 | |
410 // Sweeper support | |
411 long stack_traversal_mark() { return _stack_traversal_mark; } | |
412 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
413 | |
414 // Exception cache support | |
415 ExceptionCache* exception_cache() const { return _exception_cache; } | |
416 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
417 address handler_for_exception_and_pc(Handle exception, address pc); | |
418 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
419 void remove_from_exception_cache(ExceptionCache* ec); | |
420 | |
421 // implicit exceptions support | |
422 address continuation_for_implicit_exception(address pc); | |
423 | |
424 // On-stack replacement support | |
425 int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; } | |
426 address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; } | |
427 void invalidate_osr_method(); | |
428 nmethod* link() const { return _link; } | |
429 void set_link(nmethod *n) { _link = n; } | |
430 | |
431 // tells whether frames described by this nmethod can be deoptimized | |
432 // note: native wrappers cannot be deoptimized. | |
433 bool can_be_deoptimized() const { return is_java_method(); } | |
434 | |
435 // Inline cache support | |
436 void clear_inline_caches(); | |
437 void cleanup_inline_caches(); | |
438 bool inlinecache_check_contains(address addr) const { | |
439 return (addr >= instructions_begin() && addr < verified_entry_point()); | |
440 } | |
441 | |
442 // unlink and deallocate this nmethod | |
443 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
444 // expected to use any other private methods/data in this class. | |
445 | |
446 protected: | |
447 void flush(); | |
448 | |
449 public: | |
450 // If returning true, it is unsafe to remove this nmethod even though it is a zombie | |
451 // nmethod, since the VM might have a reference to it. Should only be called from a safepoint. | |
452 bool is_locked_by_vm() const { return _lock_count >0; } | |
453 | |
454 // See comment at definition of _last_seen_on_stack | |
455 void mark_as_seen_on_stack(); | |
456 bool can_not_entrant_be_converted(); | |
457 | |
458 // Evolution support. We make old (discarded) compiled methods point to new methodOops. | |
459 void set_method(methodOop method) { _method = method; } | |
460 | |
461 // GC support | |
462 void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
463 bool unloading_occurred); | |
464 bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
465 oop* root, bool unloading_occurred); | |
466 | |
467 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, | |
468 OopClosure* f); | |
469 void oops_do(OopClosure* f); | |
470 | |
471 // ScopeDesc for an instruction | |
472 ScopeDesc* scope_desc_at(address pc); | |
473 | |
474 private: | |
475 ScopeDesc* scope_desc_in(address begin, address end); | |
476 | |
477 address* orig_pc_addr(const frame* fr ) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } | |
478 | |
479 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
480 | |
481 PcDesc* find_pc_desc(address pc, bool approximate) { | |
482 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
483 if (desc != NULL && desc->pc_offset() == pc - instructions_begin()) { | |
484 return desc; | |
485 } | |
486 return find_pc_desc_internal(pc, approximate); | |
487 } | |
488 | |
489 public: | |
490 // ScopeDesc retrieval operation | |
491 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
492 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
493 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
494 | |
495 public: | |
496 // copying of debugging information | |
497 void copy_scopes_pcs(PcDesc* pcs, int count); | |
498 void copy_scopes_data(address buffer, int size); | |
499 | |
500 // deopt | |
501 // return true is the pc is one would expect if the frame is being deopted. | |
502 bool is_deopt_pc(address pc); | |
503 // Accessor/mutator for the original pc of a frame before a frame was deopted. | |
504 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
505 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
506 | |
507 // jvmti support: | |
508 void post_compiled_method_load_event(); | |
509 | |
510 // verify operations | |
511 void verify(); | |
512 void verify_scopes(); | |
513 void verify_interrupt_point(address interrupt_point); | |
514 | |
515 // printing support | |
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516 void print() const; |
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517 void print_code(); |
0 | 518 void print_relocations() PRODUCT_RETURN; |
519 void print_pcs() PRODUCT_RETURN; | |
520 void print_scopes() PRODUCT_RETURN; | |
521 void print_dependencies() PRODUCT_RETURN; | |
522 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
523 void print_calls(outputStream* st) PRODUCT_RETURN; | |
524 void print_handler_table() PRODUCT_RETURN; | |
525 void print_nul_chk_table() PRODUCT_RETURN; | |
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526 void print_nmethod(bool print_code); |
0 | 527 |
528 void print_on(outputStream* st, const char* title) const; | |
529 | |
530 // Logging | |
531 void log_identity(xmlStream* log) const; | |
532 void log_new_nmethod() const; | |
533 void log_state_change(int state) const; | |
534 | |
535 // Prints a comment for one native instruction (reloc info, pc desc) | |
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536 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
0 | 537 static void print_statistics() PRODUCT_RETURN; |
538 | |
539 // Compiler task identification. Note that all OSR methods | |
540 // are numbered in an independent sequence if CICountOSR is true, | |
541 // and native method wrappers are also numbered independently if | |
542 // CICountNative is true. | |
543 int compile_id() const { return _compile_id; } | |
544 const char* compile_kind() const; | |
545 | |
546 // For debugging | |
547 // CompiledIC* IC_at(char* p) const; | |
548 // PrimitiveIC* primitiveIC_at(char* p) const; | |
549 oop embeddedOop_at(address p); | |
550 | |
551 // tells if any of this method's dependencies have been invalidated | |
552 // (this is expensive!) | |
553 bool check_all_dependencies(); | |
554 | |
555 // tells if this compiled method is dependent on the given changes, | |
556 // and the changes have invalidated it | |
557 bool check_dependency_on(DepChange& changes); | |
558 | |
559 // Evolution support. Tells if this compiled method is dependent on any of | |
560 // methods m() of class dependee, such that if m() in dependee is replaced, | |
561 // this compiled method will have to be deoptimized. | |
562 bool is_evol_dependent_on(klassOop dependee); | |
563 | |
564 // Fast breakpoint support. Tells if this compiled method is | |
565 // dependent on the given method. Returns true if this nmethod | |
566 // corresponds to the given method as well. | |
567 bool is_dependent_on_method(methodOop dependee); | |
568 | |
569 // is it ok to patch at address? | |
570 bool is_patchable_at(address instr_address); | |
571 | |
572 // UseBiasedLocking support | |
573 ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() { | |
574 return _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
575 } | |
576 ByteSize compiled_synchronized_native_basic_lock_sp_offset() { | |
577 return _compiled_synchronized_native_basic_lock_sp_offset; | |
578 } | |
579 | |
580 // support for code generation | |
581 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
582 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
583 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
584 | |
585 }; | |
586 | |
587 // Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method | |
588 class nmethodLocker : public StackObj { | |
589 nmethod* _nm; | |
590 | |
591 static void lock_nmethod(nmethod* nm); // note: nm can be NULL | |
592 static void unlock_nmethod(nmethod* nm); // (ditto) | |
593 | |
594 public: | |
595 nmethodLocker(address pc); // derive nm from pc | |
596 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
597 nmethodLocker() { _nm = NULL; } | |
598 ~nmethodLocker() { unlock_nmethod(_nm); } | |
599 | |
600 nmethod* code() { return _nm; } | |
601 void set_code(nmethod* new_nm) { | |
602 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
603 _nm = new_nm; | |
604 lock_nmethod(_nm); | |
605 } | |
606 }; |