Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 100:c7c777385a15
6667042: PrintAssembly option does not work without special plugin
Summary: remove old private plugin interface, simplify, rework old plugin to use unchanged Gnu sources
Reviewed-by: kvn, rasbold
author | jrose |
---|---|
date | Wed, 02 Apr 2008 12:09:59 -0700 |
parents | 65a06b4a51b8 |
children | 018d5b58dd4f |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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 # include "incls/_precompiled.incl" | |
26 # include "incls/_nmethod.cpp.incl" | |
27 | |
28 #ifdef DTRACE_ENABLED | |
29 | |
30 | |
31 // Only bother with this argument setup if dtrace is available | |
32 | |
33 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
34 const char*, int, const char*, int, const char*, int, void*, size_t); | |
35 | |
36 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
37 char*, int, char*, int, char*, int); | |
38 | |
39 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
40 { \ | |
41 methodOop m = (method); \ | |
42 if (m != NULL) { \ | |
43 symbolOop klass_name = m->klass_name(); \ | |
44 symbolOop name = m->name(); \ | |
45 symbolOop signature = m->signature(); \ | |
46 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ | |
47 klass_name->bytes(), klass_name->utf8_length(), \ | |
48 name->bytes(), name->utf8_length(), \ | |
49 signature->bytes(), signature->utf8_length()); \ | |
50 } \ | |
51 } | |
52 | |
53 #else // ndef DTRACE_ENABLED | |
54 | |
55 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
56 | |
57 #endif | |
58 | |
59 bool nmethod::is_compiled_by_c1() const { | |
60 if (is_native_method()) return false; | |
61 assert(compiler() != NULL, "must be"); | |
62 return compiler()->is_c1(); | |
63 } | |
64 bool nmethod::is_compiled_by_c2() const { | |
65 if (is_native_method()) return false; | |
66 assert(compiler() != NULL, "must be"); | |
67 return compiler()->is_c2(); | |
68 } | |
69 | |
70 | |
71 | |
72 //--------------------------------------------------------------------------------- | |
73 // NMethod statistics | |
74 // They are printed under various flags, including: | |
75 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
76 // (In the latter two cases, they like other stats are printed to the log only.) | |
77 | |
78 #ifndef PRODUCT | |
79 // These variables are put into one block to reduce relocations | |
80 // and make it simpler to print from the debugger. | |
81 static | |
82 struct nmethod_stats_struct { | |
83 int nmethod_count; | |
84 int total_size; | |
85 int relocation_size; | |
86 int code_size; | |
87 int stub_size; | |
88 int consts_size; | |
89 int scopes_data_size; | |
90 int scopes_pcs_size; | |
91 int dependencies_size; | |
92 int handler_table_size; | |
93 int nul_chk_table_size; | |
94 int oops_size; | |
95 | |
96 void note_nmethod(nmethod* nm) { | |
97 nmethod_count += 1; | |
98 total_size += nm->size(); | |
99 relocation_size += nm->relocation_size(); | |
100 code_size += nm->code_size(); | |
101 stub_size += nm->stub_size(); | |
102 consts_size += nm->consts_size(); | |
103 scopes_data_size += nm->scopes_data_size(); | |
104 scopes_pcs_size += nm->scopes_pcs_size(); | |
105 dependencies_size += nm->dependencies_size(); | |
106 handler_table_size += nm->handler_table_size(); | |
107 nul_chk_table_size += nm->nul_chk_table_size(); | |
108 oops_size += nm->oops_size(); | |
109 } | |
110 void print_nmethod_stats() { | |
111 if (nmethod_count == 0) return; | |
112 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
113 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
114 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
115 if (code_size != 0) tty->print_cr(" main code = %d", code_size); | |
116 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); | |
117 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); | |
118 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); | |
119 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
120 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
121 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
122 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
123 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); | |
124 } | |
125 | |
126 int native_nmethod_count; | |
127 int native_total_size; | |
128 int native_relocation_size; | |
129 int native_code_size; | |
130 int native_oops_size; | |
131 void note_native_nmethod(nmethod* nm) { | |
132 native_nmethod_count += 1; | |
133 native_total_size += nm->size(); | |
134 native_relocation_size += nm->relocation_size(); | |
135 native_code_size += nm->code_size(); | |
136 native_oops_size += nm->oops_size(); | |
137 } | |
138 void print_native_nmethod_stats() { | |
139 if (native_nmethod_count == 0) return; | |
140 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
141 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
142 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
143 if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size); | |
144 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); | |
145 } | |
146 | |
147 int pc_desc_resets; // number of resets (= number of caches) | |
148 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
149 int pc_desc_approx; // number of those which have approximate true | |
150 int pc_desc_repeats; // number of _last_pc_desc hits | |
151 int pc_desc_hits; // number of LRU cache hits | |
152 int pc_desc_tests; // total number of PcDesc examinations | |
153 int pc_desc_searches; // total number of quasi-binary search steps | |
154 int pc_desc_adds; // number of LUR cache insertions | |
155 | |
156 void print_pc_stats() { | |
157 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
158 pc_desc_queries, | |
159 (double)(pc_desc_tests + pc_desc_searches) | |
160 / pc_desc_queries); | |
161 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
162 pc_desc_resets, | |
163 pc_desc_queries, pc_desc_approx, | |
164 pc_desc_repeats, pc_desc_hits, | |
165 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
166 } | |
167 } nmethod_stats; | |
168 #endif //PRODUCT | |
169 | |
170 //--------------------------------------------------------------------------------- | |
171 | |
172 | |
173 // The _unwind_handler is a special marker address, which says that | |
174 // for given exception oop and address, the frame should be removed | |
175 // as the tuple cannot be caught in the nmethod | |
176 address ExceptionCache::_unwind_handler = (address) -1; | |
177 | |
178 | |
179 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
180 assert(pc != NULL, "Must be non null"); | |
181 assert(exception.not_null(), "Must be non null"); | |
182 assert(handler != NULL, "Must be non null"); | |
183 | |
184 _count = 0; | |
185 _exception_type = exception->klass(); | |
186 _next = NULL; | |
187 | |
188 add_address_and_handler(pc,handler); | |
189 } | |
190 | |
191 | |
192 address ExceptionCache::match(Handle exception, address pc) { | |
193 assert(pc != NULL,"Must be non null"); | |
194 assert(exception.not_null(),"Must be non null"); | |
195 if (exception->klass() == exception_type()) { | |
196 return (test_address(pc)); | |
197 } | |
198 | |
199 return NULL; | |
200 } | |
201 | |
202 | |
203 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
204 assert(exception.not_null(),"Must be non null"); | |
205 if (exception->klass() == exception_type() && count() < cache_size) { | |
206 return true; | |
207 } | |
208 return false; | |
209 } | |
210 | |
211 | |
212 address ExceptionCache::test_address(address addr) { | |
213 for (int i=0; i<count(); i++) { | |
214 if (pc_at(i) == addr) { | |
215 return handler_at(i); | |
216 } | |
217 } | |
218 return NULL; | |
219 } | |
220 | |
221 | |
222 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
223 if (test_address(addr) == handler) return true; | |
224 if (count() < cache_size) { | |
225 set_pc_at(count(),addr); | |
226 set_handler_at(count(), handler); | |
227 increment_count(); | |
228 return true; | |
229 } | |
230 return false; | |
231 } | |
232 | |
233 | |
234 // private method for handling exception cache | |
235 // These methods are private, and used to manipulate the exception cache | |
236 // directly. | |
237 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
238 ExceptionCache* ec = exception_cache(); | |
239 while (ec != NULL) { | |
240 if (ec->match_exception_with_space(exception)) { | |
241 return ec; | |
242 } | |
243 ec = ec->next(); | |
244 } | |
245 return NULL; | |
246 } | |
247 | |
248 | |
249 //----------------------------------------------------------------------------- | |
250 | |
251 | |
252 // Helper used by both find_pc_desc methods. | |
253 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
254 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
255 if (!approximate) | |
256 return pc->pc_offset() == pc_offset; | |
257 else | |
258 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
259 } | |
260 | |
261 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
262 if (initial_pc_desc == NULL) { | |
263 _last_pc_desc = NULL; // native method | |
264 return; | |
265 } | |
266 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
267 // reset the cache by filling it with benign (non-null) values | |
268 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
269 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
270 for (int i = 0; i < cache_size; i++) | |
271 _pc_descs[i] = initial_pc_desc; | |
272 } | |
273 | |
274 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
275 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
276 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
277 | |
278 // In order to prevent race conditions do not load cache elements | |
279 // repeatedly, but use a local copy: | |
280 PcDesc* res; | |
281 | |
282 // Step one: Check the most recently returned value. | |
283 res = _last_pc_desc; | |
284 if (res == NULL) return NULL; // native method; no PcDescs at all | |
285 if (match_desc(res, pc_offset, approximate)) { | |
286 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
287 return res; | |
288 } | |
289 | |
290 // Step two: Check the LRU cache. | |
291 for (int i = 0; i < cache_size; i++) { | |
292 res = _pc_descs[i]; | |
293 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
294 if (match_desc(res, pc_offset, approximate)) { | |
295 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
296 _last_pc_desc = res; // record this cache hit in case of repeat | |
297 return res; | |
298 } | |
299 } | |
300 | |
301 // Report failure. | |
302 return NULL; | |
303 } | |
304 | |
305 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
306 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
307 // Update the LRU cache by shifting pc_desc forward: | |
308 for (int i = 0; i < cache_size; i++) { | |
309 PcDesc* next = _pc_descs[i]; | |
310 _pc_descs[i] = pc_desc; | |
311 pc_desc = next; | |
312 } | |
313 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
314 } | |
315 | |
316 // adjust pcs_size so that it is a multiple of both oopSize and | |
317 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
318 // of oopSize, then 2*sizeof(PcDesc) is) | |
319 static int adjust_pcs_size(int pcs_size) { | |
320 int nsize = round_to(pcs_size, oopSize); | |
321 if ((nsize % sizeof(PcDesc)) != 0) { | |
322 nsize = pcs_size + sizeof(PcDesc); | |
323 } | |
324 assert((nsize % oopSize) == 0, "correct alignment"); | |
325 return nsize; | |
326 } | |
327 | |
328 //----------------------------------------------------------------------------- | |
329 | |
330 | |
331 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
332 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
333 assert(new_entry != NULL,"Must be non null"); | |
334 assert(new_entry->next() == NULL, "Must be null"); | |
335 | |
336 if (exception_cache() != NULL) { | |
337 new_entry->set_next(exception_cache()); | |
338 } | |
339 set_exception_cache(new_entry); | |
340 } | |
341 | |
342 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
343 ExceptionCache* prev = NULL; | |
344 ExceptionCache* curr = exception_cache(); | |
345 assert(curr != NULL, "nothing to remove"); | |
346 // find the previous and next entry of ec | |
347 while (curr != ec) { | |
348 prev = curr; | |
349 curr = curr->next(); | |
350 assert(curr != NULL, "ExceptionCache not found"); | |
351 } | |
352 // now: curr == ec | |
353 ExceptionCache* next = curr->next(); | |
354 if (prev == NULL) { | |
355 set_exception_cache(next); | |
356 } else { | |
357 prev->set_next(next); | |
358 } | |
359 delete curr; | |
360 } | |
361 | |
362 | |
363 // public method for accessing the exception cache | |
364 // These are the public access methods. | |
365 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
366 // We never grab a lock to read the exception cache, so we may | |
367 // have false negatives. This is okay, as it can only happen during | |
368 // the first few exception lookups for a given nmethod. | |
369 ExceptionCache* ec = exception_cache(); | |
370 while (ec != NULL) { | |
371 address ret_val; | |
372 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
373 return ret_val; | |
374 } | |
375 ec = ec->next(); | |
376 } | |
377 return NULL; | |
378 } | |
379 | |
380 | |
381 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
382 // There are potential race conditions during exception cache updates, so we | |
383 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
384 // we dont lock during reads, it is possible to have several threads attempt | |
385 // to update the cache with the same data. We need to check for already inserted | |
386 // copies of the current data before adding it. | |
387 | |
388 MutexLocker ml(ExceptionCache_lock); | |
389 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
390 | |
391 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
392 target_entry = new ExceptionCache(exception,pc,handler); | |
393 add_exception_cache_entry(target_entry); | |
394 } | |
395 } | |
396 | |
397 | |
398 //-------------end of code for ExceptionCache-------------- | |
399 | |
400 | |
401 void nmFlags::clear() { | |
402 assert(sizeof(nmFlags) == sizeof(int), "using more than one word for nmFlags"); | |
403 *(jint*)this = 0; | |
404 } | |
405 | |
406 int nmethod::total_size() const { | |
407 return | |
408 code_size() + | |
409 stub_size() + | |
410 consts_size() + | |
411 scopes_data_size() + | |
412 scopes_pcs_size() + | |
413 handler_table_size() + | |
414 nul_chk_table_size(); | |
415 } | |
416 | |
417 const char* nmethod::compile_kind() const { | |
418 if (method() == NULL) return "unloaded"; | |
419 if (is_native_method()) return "c2n"; | |
420 if (is_osr_method()) return "osr"; | |
421 return NULL; | |
422 } | |
423 | |
424 // %%% This variable is no longer used? | |
425 int nmethod::_zombie_instruction_size = NativeJump::instruction_size; | |
426 | |
427 | |
428 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
429 CodeBuffer *code_buffer, | |
430 int vep_offset, | |
431 int frame_complete, | |
432 int frame_size, | |
433 ByteSize basic_lock_owner_sp_offset, | |
434 ByteSize basic_lock_sp_offset, | |
435 OopMapSet* oop_maps) { | |
436 // create nmethod | |
437 nmethod* nm = NULL; | |
438 { | |
439 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
440 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
441 const int dummy = -1; // Flag to force proper "operator new" | |
442 CodeOffsets offsets; | |
443 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
444 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
445 nm = new (native_nmethod_size) | |
446 nmethod(method(), native_nmethod_size, &offsets, | |
447 code_buffer, frame_size, | |
448 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
449 oop_maps); | |
450 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
451 if (PrintAssembly && nm != NULL) | |
452 Disassembler::decode(nm); | |
453 } | |
454 // verify nmethod | |
455 debug_only(if (nm) nm->verify();) // might block | |
456 | |
457 if (nm != NULL) { | |
458 nm->log_new_nmethod(); | |
459 } | |
460 | |
461 return nm; | |
462 } | |
463 | |
464 nmethod* nmethod::new_nmethod(methodHandle method, | |
465 int compile_id, | |
466 int entry_bci, | |
467 CodeOffsets* offsets, | |
468 int orig_pc_offset, | |
469 DebugInformationRecorder* debug_info, | |
470 Dependencies* dependencies, | |
471 CodeBuffer* code_buffer, int frame_size, | |
472 OopMapSet* oop_maps, | |
473 ExceptionHandlerTable* handler_table, | |
474 ImplicitExceptionTable* nul_chk_table, | |
475 AbstractCompiler* compiler, | |
476 int comp_level | |
477 ) | |
478 { | |
479 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
480 // create nmethod | |
481 nmethod* nm = NULL; | |
482 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
483 int nmethod_size = | |
484 allocation_size(code_buffer, sizeof(nmethod)) | |
485 + adjust_pcs_size(debug_info->pcs_size()) | |
486 + round_to(dependencies->size_in_bytes() , oopSize) | |
487 + round_to(handler_table->size_in_bytes(), oopSize) | |
488 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
489 + round_to(debug_info->data_size() , oopSize); | |
490 nm = new (nmethod_size) | |
491 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
492 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
493 oop_maps, | |
494 handler_table, | |
495 nul_chk_table, | |
496 compiler, | |
497 comp_level); | |
498 if (nm != NULL) { | |
499 // To make dependency checking during class loading fast, record | |
500 // the nmethod dependencies in the classes it is dependent on. | |
501 // This allows the dependency checking code to simply walk the | |
502 // class hierarchy above the loaded class, checking only nmethods | |
503 // which are dependent on those classes. The slow way is to | |
504 // check every nmethod for dependencies which makes it linear in | |
505 // the number of methods compiled. For applications with a lot | |
506 // classes the slow way is too slow. | |
507 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
508 klassOop klass = deps.context_type(); | |
509 if (klass == NULL) continue; // ignore things like evol_method | |
510 | |
511 // record this nmethod as dependent on this klass | |
512 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
513 } | |
514 } | |
515 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
516 if (PrintAssembly && nm != NULL) | |
517 Disassembler::decode(nm); | |
518 } | |
519 | |
520 // verify nmethod | |
521 debug_only(if (nm) nm->verify();) // might block | |
522 | |
523 if (nm != NULL) { | |
524 nm->log_new_nmethod(); | |
525 } | |
526 | |
527 // done | |
528 return nm; | |
529 } | |
530 | |
531 | |
532 // For native wrappers | |
533 nmethod::nmethod( | |
534 methodOop method, | |
535 int nmethod_size, | |
536 CodeOffsets* offsets, | |
537 CodeBuffer* code_buffer, | |
538 int frame_size, | |
539 ByteSize basic_lock_owner_sp_offset, | |
540 ByteSize basic_lock_sp_offset, | |
541 OopMapSet* oop_maps ) | |
542 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
543 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
544 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), | |
545 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) | |
546 { | |
547 { | |
548 debug_only(No_Safepoint_Verifier nsv;) | |
549 assert_locked_or_safepoint(CodeCache_lock); | |
550 | |
551 NOT_PRODUCT(_has_debug_info = false; ) | |
552 _method = method; | |
553 _entry_bci = InvocationEntryBci; | |
554 _link = NULL; | |
555 _compiler = NULL; | |
556 // We have no exception handler or deopt handler make the | |
557 // values something that will never match a pc like the nmethod vtable entry | |
558 _exception_offset = 0; | |
559 _deoptimize_offset = 0; | |
560 _orig_pc_offset = 0; | |
561 _stub_offset = data_offset(); | |
562 _consts_offset = data_offset(); | |
563 _scopes_data_offset = data_offset(); | |
564 _scopes_pcs_offset = _scopes_data_offset; | |
565 _dependencies_offset = _scopes_pcs_offset; | |
566 _handler_table_offset = _dependencies_offset; | |
567 _nul_chk_table_offset = _handler_table_offset; | |
568 _nmethod_end_offset = _nul_chk_table_offset; | |
569 _compile_id = 0; // default | |
570 _comp_level = CompLevel_none; | |
571 _entry_point = instructions_begin(); | |
572 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
573 _osr_entry_point = NULL; | |
574 _exception_cache = NULL; | |
575 _pc_desc_cache.reset_to(NULL); | |
576 | |
577 flags.clear(); | |
578 flags.state = alive; | |
579 _markedForDeoptimization = 0; | |
580 | |
581 _lock_count = 0; | |
582 _stack_traversal_mark = 0; | |
583 | |
584 code_buffer->copy_oops_to(this); | |
585 debug_only(check_store();) | |
586 CodeCache::commit(this); | |
587 VTune::create_nmethod(this); | |
588 } | |
589 | |
590 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
591 ttyLocker ttyl; // keep the following output all in one block | |
592 // This output goes directly to the tty, not the compiler log. | |
593 // To enable tools to match it up with the compilation activity, | |
594 // be sure to tag this tty output with the compile ID. | |
595 if (xtty != NULL) { | |
596 xtty->begin_head("print_native_nmethod"); | |
597 xtty->method(_method); | |
598 xtty->stamp(); | |
599 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
600 } | |
601 // print the header part first | |
602 print(); | |
603 // then print the requested information | |
604 if (PrintNativeNMethods) { | |
605 print_code(); | |
606 oop_maps->print(); | |
607 } | |
608 if (PrintRelocations) { | |
609 print_relocations(); | |
610 } | |
611 if (xtty != NULL) { | |
612 xtty->tail("print_native_nmethod"); | |
613 } | |
614 } | |
615 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
616 } | |
617 | |
618 | |
619 void* nmethod::operator new(size_t size, int nmethod_size) { | |
620 // Always leave some room in the CodeCache for I2C/C2I adapters | |
621 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
622 return CodeCache::allocate(nmethod_size); | |
623 } | |
624 | |
625 | |
626 nmethod::nmethod( | |
627 methodOop method, | |
628 int nmethod_size, | |
629 int compile_id, | |
630 int entry_bci, | |
631 CodeOffsets* offsets, | |
632 int orig_pc_offset, | |
633 DebugInformationRecorder* debug_info, | |
634 Dependencies* dependencies, | |
635 CodeBuffer *code_buffer, | |
636 int frame_size, | |
637 OopMapSet* oop_maps, | |
638 ExceptionHandlerTable* handler_table, | |
639 ImplicitExceptionTable* nul_chk_table, | |
640 AbstractCompiler* compiler, | |
641 int comp_level | |
642 ) | |
643 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
644 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
645 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), | |
646 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) | |
647 { | |
648 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
649 { | |
650 debug_only(No_Safepoint_Verifier nsv;) | |
651 assert_locked_or_safepoint(CodeCache_lock); | |
652 | |
653 NOT_PRODUCT(_has_debug_info = false; ) | |
654 _method = method; | |
655 _compile_id = compile_id; | |
656 _comp_level = comp_level; | |
657 _entry_bci = entry_bci; | |
658 _link = NULL; | |
659 _compiler = compiler; | |
660 _orig_pc_offset = orig_pc_offset; | |
661 _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); | |
662 | |
663 // Exception handler and deopt handler are in the stub section | |
664 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); | |
665 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
666 _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); | |
667 _scopes_data_offset = data_offset(); | |
668 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); | |
669 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); | |
670 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
671 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
672 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
673 | |
674 _entry_point = instructions_begin(); | |
675 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
676 _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
677 _exception_cache = NULL; | |
678 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
679 | |
680 flags.clear(); | |
681 flags.state = alive; | |
682 _markedForDeoptimization = 0; | |
683 | |
684 _unload_reported = false; // jvmti state | |
685 | |
686 _lock_count = 0; | |
687 _stack_traversal_mark = 0; | |
688 | |
689 // Copy contents of ScopeDescRecorder to nmethod | |
690 code_buffer->copy_oops_to(this); | |
691 debug_info->copy_to(this); | |
692 dependencies->copy_to(this); | |
693 debug_only(check_store();) | |
694 | |
695 CodeCache::commit(this); | |
696 | |
697 VTune::create_nmethod(this); | |
698 | |
699 // Copy contents of ExceptionHandlerTable to nmethod | |
700 handler_table->copy_to(this); | |
701 nul_chk_table->copy_to(this); | |
702 | |
703 // we use the information of entry points to find out if a method is | |
704 // static or non static | |
705 assert(compiler->is_c2() || | |
706 _method->is_static() == (entry_point() == _verified_entry_point), | |
707 " entry points must be same for static methods and vice versa"); | |
708 } | |
709 | |
100
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710 bool printnmethods = PrintNMethods |
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711 || CompilerOracle::should_print(_method) |
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712 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 713 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
714 print_nmethod(printnmethods); | |
715 } | |
716 | |
717 // Note: Do not verify in here as the CodeCache_lock is | |
718 // taken which would conflict with the CompiledIC_lock | |
719 // which taken during the verification of call sites. | |
720 // (was bug - gri 10/25/99) | |
721 | |
722 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
723 } | |
724 | |
725 | |
726 // Print a short set of xml attributes to identify this nmethod. The | |
727 // output should be embedded in some other element. | |
728 void nmethod::log_identity(xmlStream* log) const { | |
729 log->print(" compile_id='%d'", compile_id()); | |
730 const char* nm_kind = compile_kind(); | |
731 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
732 if (compiler() != NULL) { | |
733 log->print(" compiler='%s'", compiler()->name()); | |
734 } | |
735 #ifdef TIERED | |
736 log->print(" level='%d'", comp_level()); | |
737 #endif // TIERED | |
738 } | |
739 | |
740 | |
741 #define LOG_OFFSET(log, name) \ | |
742 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
743 log->print(" " XSTR(name) "_offset='%d'" , \ | |
744 (intptr_t)name##_begin() - (intptr_t)this) | |
745 | |
746 | |
747 void nmethod::log_new_nmethod() const { | |
748 if (LogCompilation && xtty != NULL) { | |
749 ttyLocker ttyl; | |
750 HandleMark hm; | |
751 xtty->begin_elem("nmethod"); | |
752 log_identity(xtty); | |
753 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", | |
754 instructions_begin(), size()); | |
755 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
756 | |
757 LOG_OFFSET(xtty, relocation); | |
758 LOG_OFFSET(xtty, code); | |
759 LOG_OFFSET(xtty, stub); | |
760 LOG_OFFSET(xtty, consts); | |
761 LOG_OFFSET(xtty, scopes_data); | |
762 LOG_OFFSET(xtty, scopes_pcs); | |
763 LOG_OFFSET(xtty, dependencies); | |
764 LOG_OFFSET(xtty, handler_table); | |
765 LOG_OFFSET(xtty, nul_chk_table); | |
766 LOG_OFFSET(xtty, oops); | |
767 | |
768 xtty->method(method()); | |
769 xtty->stamp(); | |
770 xtty->end_elem(); | |
771 } | |
772 } | |
773 | |
774 #undef LOG_OFFSET | |
775 | |
776 | |
777 // Print out more verbose output usually for a newly created nmethod. | |
778 void nmethod::print_on(outputStream* st, const char* title) const { | |
779 if (st != NULL) { | |
780 ttyLocker ttyl; | |
781 // Print a little tag line that looks like +PrintCompilation output: | |
782 st->print("%3d%c %s", | |
783 compile_id(), | |
784 is_osr_method() ? '%' : | |
785 method() != NULL && | |
786 is_native_method() ? 'n' : ' ', | |
787 title); | |
788 #ifdef TIERED | |
789 st->print(" (%d) ", comp_level()); | |
790 #endif // TIERED | |
791 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); | |
792 if (method() != NULL) { | |
793 method()->print_short_name(st); | |
794 if (is_osr_method()) | |
795 st->print(" @ %d", osr_entry_bci()); | |
796 if (method()->code_size() > 0) | |
797 st->print(" (%d bytes)", method()->code_size()); | |
798 } | |
799 } | |
800 } | |
801 | |
802 | |
803 void nmethod::print_nmethod(bool printmethod) { | |
804 ttyLocker ttyl; // keep the following output all in one block | |
805 if (xtty != NULL) { | |
806 xtty->begin_head("print_nmethod"); | |
807 xtty->stamp(); | |
808 xtty->end_head(); | |
809 } | |
810 // print the header part first | |
811 print(); | |
812 // then print the requested information | |
813 if (printmethod) { | |
814 print_code(); | |
815 print_pcs(); | |
816 oop_maps()->print(); | |
817 } | |
818 if (PrintDebugInfo) { | |
819 print_scopes(); | |
820 } | |
821 if (PrintRelocations) { | |
822 print_relocations(); | |
823 } | |
824 if (PrintDependencies) { | |
825 print_dependencies(); | |
826 } | |
827 if (PrintExceptionHandlers) { | |
828 print_handler_table(); | |
829 print_nul_chk_table(); | |
830 } | |
831 if (xtty != NULL) { | |
832 xtty->tail("print_nmethod"); | |
833 } | |
834 } | |
835 | |
836 | |
837 void nmethod::set_version(int v) { | |
838 flags.version = v; | |
839 } | |
840 | |
841 | |
842 ScopeDesc* nmethod::scope_desc_at(address pc) { | |
843 PcDesc* pd = pc_desc_at(pc); | |
844 guarantee(pd != NULL, "scope must be present"); | |
845 return new ScopeDesc(this, pd->scope_decode_offset(), | |
846 pd->obj_decode_offset()); | |
847 } | |
848 | |
849 | |
850 void nmethod::clear_inline_caches() { | |
851 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
852 if (is_zombie()) { | |
853 return; | |
854 } | |
855 | |
856 RelocIterator iter(this); | |
857 while (iter.next()) { | |
858 iter.reloc()->clear_inline_cache(); | |
859 } | |
860 } | |
861 | |
862 | |
863 void nmethod::cleanup_inline_caches() { | |
864 | |
865 assert(SafepointSynchronize::is_at_safepoint() && | |
866 !CompiledIC_lock->is_locked() && | |
867 !Patching_lock->is_locked(), "no threads must be updating the inline caches by them selfs"); | |
868 | |
869 // If the method is not entrant or zombie then a JMP is plastered over the | |
870 // first few bytes. If an oop in the old code was there, that oop | |
871 // should not get GC'd. Skip the first few bytes of oops on | |
872 // not-entrant methods. | |
873 address low_boundary = verified_entry_point(); | |
874 if (!is_in_use()) { | |
875 low_boundary += NativeJump::instruction_size; | |
876 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
877 // This means that the low_boundary is going to be a little too high. | |
878 // This shouldn't matter, since oops of non-entrant methods are never used. | |
879 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
880 } | |
881 | |
882 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
883 ResourceMark rm; | |
884 RelocIterator iter(this, low_boundary); | |
885 while(iter.next()) { | |
886 switch(iter.type()) { | |
887 case relocInfo::virtual_call_type: | |
888 case relocInfo::opt_virtual_call_type: { | |
889 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
890 // Ok, to lookup references to zombies here | |
891 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
892 if( cb != NULL && cb->is_nmethod() ) { | |
893 nmethod* nm = (nmethod*)cb; | |
894 // Clean inline caches pointing to both zombie and not_entrant methods | |
895 if (!nm->is_in_use()) ic->set_to_clean(); | |
896 } | |
897 break; | |
898 } | |
899 case relocInfo::static_call_type: { | |
900 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
901 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
902 if( cb != NULL && cb->is_nmethod() ) { | |
903 nmethod* nm = (nmethod*)cb; | |
904 // Clean inline caches pointing to both zombie and not_entrant methods | |
905 if (!nm->is_in_use()) csc->set_to_clean(); | |
906 } | |
907 break; | |
908 } | |
909 } | |
910 } | |
911 } | |
912 | |
913 void nmethod::mark_as_seen_on_stack() { | |
914 assert(is_not_entrant(), "must be a non-entrant method"); | |
915 set_stack_traversal_mark(NMethodSweeper::traversal_count()); | |
916 } | |
917 | |
918 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
919 bool nmethod::can_not_entrant_be_converted() { | |
920 assert(is_not_entrant(), "must be a non-entrant method"); | |
921 assert(SafepointSynchronize::is_at_safepoint(), "must be called during a safepoint"); | |
922 | |
923 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
924 // count can be greater than the stack traversal count before it hits the | |
925 // nmethod for the second time. | |
926 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
927 } | |
928 | |
929 void nmethod::inc_decompile_count() { | |
930 // Could be gated by ProfileTraps, but do not bother... | |
931 methodOop m = method(); | |
932 if (m == NULL) return; | |
933 methodDataOop mdo = m->method_data(); | |
934 if (mdo == NULL) return; | |
935 // There is a benign race here. See comments in methodDataOop.hpp. | |
936 mdo->inc_decompile_count(); | |
937 } | |
938 | |
939 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
940 | |
941 post_compiled_method_unload(); | |
942 | |
943 // Since this nmethod is being unloaded, make sure that dependencies | |
944 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
945 // indicate that this work is being done during a GC. | |
946 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
947 assert(is_alive != NULL, "Should be non-NULL"); | |
948 // A non-NULL is_alive closure indicates that this is being called during GC. | |
949 flush_dependencies(is_alive); | |
950 | |
951 // Break cycle between nmethod & method | |
952 if (TraceClassUnloading && WizardMode) { | |
953 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
954 " unloadable], methodOop(" INTPTR_FORMAT | |
955 "), cause(" INTPTR_FORMAT ")", | |
956 this, (address)_method, (address)cause); | |
957 cause->klass()->print(); | |
958 } | |
959 // If _method is already NULL the methodOop is about to be unloaded, | |
960 // so we don't have to break the cycle. Note that it is possible to | |
961 // have the methodOop live here, in case we unload the nmethod because | |
962 // it is pointing to some oop (other than the methodOop) being unloaded. | |
963 if (_method != NULL) { | |
964 // OSR methods point to the methodOop, but the methodOop does not | |
965 // point back! | |
966 if (_method->code() == this) { | |
967 _method->clear_code(); // Break a cycle | |
968 } | |
969 inc_decompile_count(); // Last chance to make a mark on the MDO | |
970 _method = NULL; // Clear the method of this dead nmethod | |
971 } | |
972 // Make the class unloaded - i.e., change state and notify sweeper | |
973 check_safepoint(); | |
974 if (is_in_use()) { | |
975 // Transitioning directly from live to unloaded -- so | |
976 // we need to force a cache clean-up; remember this | |
977 // for later on. | |
978 CodeCache::set_needs_cache_clean(true); | |
979 } | |
980 flags.state = unloaded; | |
981 | |
982 // The methodOop is gone at this point | |
983 assert(_method == NULL, "Tautology"); | |
984 | |
985 set_link(NULL); | |
986 NMethodSweeper::notify(this); | |
987 } | |
988 | |
989 void nmethod::invalidate_osr_method() { | |
990 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
991 if (_entry_bci != InvalidOSREntryBci) | |
992 inc_decompile_count(); | |
993 // Remove from list of active nmethods | |
994 if (method() != NULL) | |
995 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
996 // Set entry as invalid | |
997 _entry_bci = InvalidOSREntryBci; | |
998 } | |
999 | |
1000 void nmethod::log_state_change(int state) const { | |
1001 if (LogCompilation) { | |
1002 if (xtty != NULL) { | |
1003 ttyLocker ttyl; // keep the following output all in one block | |
1004 xtty->begin_elem("make_not_entrant %sthread='" UINTX_FORMAT "'", | |
1005 (state == zombie ? "zombie='1' " : ""), | |
1006 os::current_thread_id()); | |
1007 log_identity(xtty); | |
1008 xtty->stamp(); | |
1009 xtty->end_elem(); | |
1010 } | |
1011 } | |
1012 if (PrintCompilation) { | |
1013 print_on(tty, state == zombie ? "made zombie " : "made not entrant "); | |
1014 tty->cr(); | |
1015 } | |
1016 } | |
1017 | |
1018 // Common functionality for both make_not_entrant and make_zombie | |
1019 void nmethod::make_not_entrant_or_zombie(int state) { | |
1020 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); | |
1021 | |
1022 // Code for an on-stack-replacement nmethod is removed when a class gets unloaded. | |
1023 // They never become zombie/non-entrant, so the nmethod sweeper will never remove | |
1024 // them. Instead the entry_bci is set to InvalidOSREntryBci, so the osr nmethod | |
1025 // will never be used anymore. That the nmethods only gets removed when class unloading | |
1026 // happens, make life much simpler, since the nmethods are not just going to disappear | |
1027 // out of the blue. | |
1028 if (is_osr_only_method()) { | |
1029 if (osr_entry_bci() != InvalidOSREntryBci) { | |
1030 // only log this once | |
1031 log_state_change(state); | |
1032 } | |
1033 invalidate_osr_method(); | |
1034 return; | |
1035 } | |
1036 | |
1037 // If the method is already zombie or set to the state we want, nothing to do | |
1038 if (is_zombie() || (state == not_entrant && is_not_entrant())) { | |
1039 return; | |
1040 } | |
1041 | |
1042 log_state_change(state); | |
1043 | |
1044 // Make sure the nmethod is not flushed in case of a safepoint in code below. | |
1045 nmethodLocker nml(this); | |
1046 | |
1047 { | |
1048 // Enter critical section. Does not block for safepoint. | |
1049 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1050 // The caller can be calling the method statically or through an inline | |
1051 // cache call. | |
1052 if (!is_not_entrant()) { | |
1053 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), | |
1054 SharedRuntime::get_handle_wrong_method_stub()); | |
1055 assert (NativeJump::instruction_size == nmethod::_zombie_instruction_size, ""); | |
1056 } | |
1057 | |
1058 // When the nmethod becomes zombie it is no longer alive so the | |
1059 // dependencies must be flushed. nmethods in the not_entrant | |
1060 // state will be flushed later when the transition to zombie | |
1061 // happens or they get unloaded. | |
1062 if (state == zombie) { | |
1063 assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); | |
1064 flush_dependencies(NULL); | |
1065 } else { | |
1066 assert(state == not_entrant, "other cases may need to be handled differently"); | |
1067 } | |
1068 | |
1069 // Change state | |
1070 flags.state = state; | |
1071 } // leave critical region under Patching_lock | |
1072 | |
1073 if (state == not_entrant) { | |
1074 Events::log("Make nmethod not entrant " INTPTR_FORMAT, this); | |
1075 } else { | |
1076 Events::log("Make nmethod zombie " INTPTR_FORMAT, this); | |
1077 } | |
1078 | |
1079 if (TraceCreateZombies) { | |
1080 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1081 } | |
1082 | |
1083 // Make sweeper aware that there is a zombie method that needs to be removed | |
1084 NMethodSweeper::notify(this); | |
1085 | |
1086 // not_entrant only stuff | |
1087 if (state == not_entrant) { | |
1088 mark_as_seen_on_stack(); | |
1089 } | |
1090 | |
1091 // It's a true state change, so mark the method as decompiled. | |
1092 inc_decompile_count(); | |
1093 | |
1094 | |
1095 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
1096 // and it hasn't already been reported for this nmethod then report it now. | |
1097 // (the event may have been reported earilier if the GC marked it for unloading). | |
1098 if (state == zombie) { | |
1099 | |
1100 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1101 | |
1102 if (JvmtiExport::should_post_compiled_method_unload() && | |
1103 !unload_reported()) { | |
1104 assert(method() != NULL, "checking"); | |
1105 { | |
1106 HandleMark hm; | |
1107 JvmtiExport::post_compiled_method_unload_at_safepoint( | |
1108 method()->jmethod_id(), code_begin()); | |
1109 } | |
1110 set_unload_reported(); | |
1111 } | |
1112 } | |
1113 | |
1114 | |
1115 // Zombie only stuff | |
1116 if (state == zombie) { | |
1117 VTune::delete_nmethod(this); | |
1118 } | |
1119 | |
1120 // Check whether method got unloaded at a safepoint before this, | |
1121 // if so we can skip the flushing steps below | |
1122 if (method() == NULL) return; | |
1123 | |
1124 // Remove nmethod from method. | |
1125 // We need to check if both the _code and _from_compiled_code_entry_point | |
1126 // refer to this nmethod because there is a race in setting these two fields | |
1127 // in methodOop as seen in bugid 4947125. | |
1128 // If the vep() points to the zombie nmethod, the memory for the nmethod | |
1129 // could be flushed and the compiler and vtable stubs could still call | |
1130 // through it. | |
1131 if (method()->code() == this || | |
1132 method()->from_compiled_entry() == verified_entry_point()) { | |
1133 HandleMark hm; | |
1134 method()->clear_code(); | |
1135 } | |
1136 } | |
1137 | |
1138 | |
1139 #ifndef PRODUCT | |
1140 void nmethod::check_safepoint() { | |
1141 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
1142 } | |
1143 #endif | |
1144 | |
1145 | |
1146 void nmethod::flush() { | |
1147 // Note that there are no valid oops in the nmethod anymore. | |
1148 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1149 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1150 | |
1151 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1152 check_safepoint(); | |
1153 | |
1154 // completely deallocate this method | |
1155 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1156 if (PrintMethodFlushing) { | |
1157 tty->print_cr("*flushing nmethod " INTPTR_FORMAT ". Live blobs: %d", this, CodeCache::nof_blobs()); | |
1158 } | |
1159 | |
1160 // We need to deallocate any ExceptionCache data. | |
1161 // Note that we do not need to grab the nmethod lock for this, it | |
1162 // better be thread safe if we're disposing of it! | |
1163 ExceptionCache* ec = exception_cache(); | |
1164 set_exception_cache(NULL); | |
1165 while(ec != NULL) { | |
1166 ExceptionCache* next = ec->next(); | |
1167 delete ec; | |
1168 ec = next; | |
1169 } | |
1170 | |
1171 ((CodeBlob*)(this))->flush(); | |
1172 | |
1173 CodeCache::free(this); | |
1174 } | |
1175 | |
1176 | |
1177 // | |
1178 // Notify all classes this nmethod is dependent on that it is no | |
1179 // longer dependent. This should only be called in two situations. | |
1180 // First, when a nmethod transitions to a zombie all dependents need | |
1181 // to be clear. Since zombification happens at a safepoint there's no | |
1182 // synchronization issues. The second place is a little more tricky. | |
1183 // During phase 1 of mark sweep class unloading may happen and as a | |
1184 // result some nmethods may get unloaded. In this case the flushing | |
1185 // of dependencies must happen during phase 1 since after GC any | |
1186 // dependencies in the unloaded nmethod won't be updated, so | |
1187 // traversing the dependency information in unsafe. In that case this | |
1188 // function is called with a non-NULL argument and this function only | |
1189 // notifies instanceKlasses that are reachable | |
1190 | |
1191 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1192 assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint"); | |
1193 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), | |
1194 "is_alive is non-NULL if and only if we are called during GC"); | |
1195 if (!has_flushed_dependencies()) { | |
1196 set_has_flushed_dependencies(); | |
1197 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1198 klassOop klass = deps.context_type(); | |
1199 if (klass == NULL) continue; // ignore things like evol_method | |
1200 | |
1201 // During GC the is_alive closure is non-NULL, and is used to | |
1202 // determine liveness of dependees that need to be updated. | |
1203 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1204 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1205 } | |
1206 } | |
1207 } | |
1208 } | |
1209 | |
1210 | |
1211 // If this oop is not live, the nmethod can be unloaded. | |
1212 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1213 OopClosure* keep_alive, | |
1214 oop* root, bool unloading_occurred) { | |
1215 assert(root != NULL, "just checking"); | |
1216 oop obj = *root; | |
1217 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1218 return false; | |
1219 } | |
1220 if (obj->is_compiledICHolder()) { | |
1221 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1222 if (is_alive->do_object_b( | |
1223 cichk_oop->holder_method()->method_holder()) && | |
1224 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1225 // The oop should be kept alive | |
1226 keep_alive->do_oop(root); | |
1227 return false; | |
1228 } | |
1229 } | |
1230 if (!UseParallelOldGC || !VerifyParallelOldWithMarkSweep) { | |
1231 // Cannot do this test if verification of the UseParallelOldGC | |
1232 // code using the PSMarkSweep code is being done. | |
1233 assert(unloading_occurred, "Inconsistency in unloading"); | |
1234 } | |
1235 make_unloaded(is_alive, obj); | |
1236 return true; | |
1237 } | |
1238 | |
1239 // ------------------------------------------------------------------ | |
1240 // post_compiled_method_load_event | |
1241 // new method for install_code() path | |
1242 // Transfer information from compilation to jvmti | |
1243 void nmethod::post_compiled_method_load_event() { | |
1244 | |
1245 methodOop moop = method(); | |
1246 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1247 moop->klass_name()->bytes(), | |
1248 moop->klass_name()->utf8_length(), | |
1249 moop->name()->bytes(), | |
1250 moop->name()->utf8_length(), | |
1251 moop->signature()->bytes(), | |
1252 moop->signature()->utf8_length(), | |
1253 code_begin(), code_size()); | |
1254 | |
1255 if (JvmtiExport::should_post_compiled_method_load()) { | |
1256 JvmtiExport::post_compiled_method_load(this); | |
1257 } | |
1258 } | |
1259 | |
1260 void nmethod::post_compiled_method_unload() { | |
1261 assert(_method != NULL && !is_unloaded(), "just checking"); | |
1262 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1263 | |
1264 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1265 // post the event. Sometime later this nmethod will be made a zombie by | |
1266 // the sweeper but the methodOop will not be valid at that point. | |
1267 if (JvmtiExport::should_post_compiled_method_unload()) { | |
1268 assert(!unload_reported(), "already unloaded"); | |
1269 HandleMark hm; | |
1270 JvmtiExport::post_compiled_method_unload_at_safepoint( | |
1271 method()->jmethod_id(), code_begin()); | |
1272 } | |
1273 | |
1274 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1275 // any time. As the nmethod is being unloaded now we mark it has | |
1276 // having the unload event reported - this will ensure that we don't | |
1277 // attempt to report the event in the unlikely scenario where the | |
1278 // event is enabled at the time the nmethod is made a zombie. | |
1279 set_unload_reported(); | |
1280 } | |
1281 | |
1282 // This is called at the end of the strong tracing/marking phase of a | |
1283 // GC to unload an nmethod if it contains otherwise unreachable | |
1284 // oops. | |
1285 | |
1286 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1287 OopClosure* keep_alive, bool unloading_occurred) { | |
1288 // Make sure the oop's ready to receive visitors | |
1289 assert(!is_zombie() && !is_unloaded(), | |
1290 "should not call follow on zombie or unloaded nmethod"); | |
1291 | |
1292 // If the method is not entrant then a JMP is plastered over the | |
1293 // first few bytes. If an oop in the old code was there, that oop | |
1294 // should not get GC'd. Skip the first few bytes of oops on | |
1295 // not-entrant methods. | |
1296 address low_boundary = verified_entry_point(); | |
1297 if (is_not_entrant()) { | |
1298 low_boundary += NativeJump::instruction_size; | |
1299 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1300 // (See comment above.) | |
1301 } | |
1302 | |
1303 // The RedefineClasses() API can cause the class unloading invariant | |
1304 // to no longer be true. See jvmtiExport.hpp for details. | |
1305 // Also, leave a debugging breadcrumb in local flag. | |
1306 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1307 if (a_class_was_redefined) { | |
1308 // This set of the unloading_occurred flag is done before the | |
1309 // call to post_compiled_method_unload() so that the unloading | |
1310 // of this nmethod is reported. | |
1311 unloading_occurred = true; | |
1312 } | |
1313 | |
1314 // Follow methodOop | |
1315 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1316 return; | |
1317 } | |
1318 | |
1319 // Exception cache | |
1320 ExceptionCache* ec = exception_cache(); | |
1321 while (ec != NULL) { | |
1322 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1323 oop ex = *ex_addr; | |
1324 ExceptionCache* next_ec = ec->next(); | |
1325 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1326 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1327 remove_from_exception_cache(ec); | |
1328 } | |
1329 ec = next_ec; | |
1330 } | |
1331 | |
1332 // If class unloading occurred we first iterate over all inline caches and | |
1333 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1334 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1335 // iteration below. | |
1336 if (unloading_occurred) { | |
1337 RelocIterator iter(this, low_boundary); | |
1338 while(iter.next()) { | |
1339 if (iter.type() == relocInfo::virtual_call_type) { | |
1340 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1341 oop ic_oop = ic->cached_oop(); | |
1342 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1343 // The only exception is compiledICHolder oops which may | |
1344 // yet be marked below. (We check this further below). | |
1345 if (ic_oop->is_compiledICHolder()) { | |
1346 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1347 if (is_alive->do_object_b( | |
1348 cichk_oop->holder_method()->method_holder()) && | |
1349 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1350 continue; | |
1351 } | |
1352 } | |
1353 ic->set_to_clean(); | |
1354 assert(ic->cached_oop() == NULL, "cached oop in IC should be cleared") | |
1355 } | |
1356 } | |
1357 } | |
1358 } | |
1359 | |
1360 // Compiled code | |
1361 RelocIterator iter(this, low_boundary); | |
1362 while (iter.next()) { | |
1363 if (iter.type() == relocInfo::oop_type) { | |
1364 oop_Relocation* r = iter.oop_reloc(); | |
1365 // In this loop, we must only traverse those oops directly embedded in | |
1366 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1367 assert(1 == (r->oop_is_immediate()) + | |
1368 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1369 "oop must be found in exactly one place"); | |
1370 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1371 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1372 return; | |
1373 } | |
1374 } | |
1375 } | |
1376 } | |
1377 | |
1378 | |
1379 // Scopes | |
1380 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1381 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1382 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1383 return; | |
1384 } | |
1385 } | |
1386 | |
1387 #ifndef PRODUCT | |
1388 // This nmethod was not unloaded; check below that all CompiledICs | |
1389 // refer to marked oops. | |
1390 { | |
1391 RelocIterator iter(this, low_boundary); | |
1392 while (iter.next()) { | |
1393 if (iter.type() == relocInfo::virtual_call_type) { | |
1394 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1395 oop ic_oop = ic->cached_oop(); | |
1396 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1397 "Found unmarked ic_oop in reachable nmethod"); | |
1398 } | |
1399 } | |
1400 } | |
1401 #endif // !PRODUCT | |
1402 } | |
1403 | |
1404 void nmethod::oops_do(OopClosure* f) { | |
1405 // make sure the oops ready to receive visitors | |
1406 assert(!is_zombie() && !is_unloaded(), | |
1407 "should not call follow on zombie or unloaded nmethod"); | |
1408 | |
1409 // If the method is not entrant or zombie then a JMP is plastered over the | |
1410 // first few bytes. If an oop in the old code was there, that oop | |
1411 // should not get GC'd. Skip the first few bytes of oops on | |
1412 // not-entrant methods. | |
1413 address low_boundary = verified_entry_point(); | |
1414 if (is_not_entrant()) { | |
1415 low_boundary += NativeJump::instruction_size; | |
1416 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1417 // (See comment above.) | |
1418 } | |
1419 | |
1420 // Compiled code | |
1421 f->do_oop((oop*) &_method); | |
1422 ExceptionCache* ec = exception_cache(); | |
1423 while(ec != NULL) { | |
1424 f->do_oop((oop*)ec->exception_type_addr()); | |
1425 ec = ec->next(); | |
1426 } | |
1427 | |
1428 RelocIterator iter(this, low_boundary); | |
1429 while (iter.next()) { | |
1430 if (iter.type() == relocInfo::oop_type ) { | |
1431 oop_Relocation* r = iter.oop_reloc(); | |
1432 // In this loop, we must only follow those oops directly embedded in | |
1433 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1434 assert(1 == (r->oop_is_immediate()) + (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), "oop must be found in exactly one place"); | |
1435 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1436 f->do_oop(r->oop_addr()); | |
1437 } | |
1438 } | |
1439 } | |
1440 | |
1441 // Scopes | |
1442 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1443 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1444 f->do_oop(p); | |
1445 } | |
1446 } | |
1447 | |
1448 // Method that knows how to preserve outgoing arguments at call. This method must be | |
1449 // called with a frame corresponding to a Java invoke | |
1450 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1451 if (!method()->is_native()) { | |
1452 SimpleScopeDesc ssd(this, fr.pc()); | |
1453 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); | |
1454 bool is_static = call->is_invokestatic(); | |
1455 symbolOop signature = call->signature(); | |
1456 fr.oops_compiled_arguments_do(signature, is_static, reg_map, f); | |
1457 } | |
1458 } | |
1459 | |
1460 | |
1461 oop nmethod::embeddedOop_at(u_char* p) { | |
1462 RelocIterator iter(this, p, p + oopSize); | |
1463 while (iter.next()) | |
1464 if (iter.type() == relocInfo::oop_type) { | |
1465 return iter.oop_reloc()->oop_value(); | |
1466 } | |
1467 return NULL; | |
1468 } | |
1469 | |
1470 | |
1471 inline bool includes(void* p, void* from, void* to) { | |
1472 return from <= p && p < to; | |
1473 } | |
1474 | |
1475 | |
1476 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1477 assert(count >= 2, "must be sentinel values, at least"); | |
1478 | |
1479 #ifdef ASSERT | |
1480 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1481 int prev_offset = pcs[0].pc_offset(); | |
1482 assert(prev_offset == PcDesc::lower_offset_limit, | |
1483 "must start with a sentinel"); | |
1484 for (int i = 1; i < count; i++) { | |
1485 int this_offset = pcs[i].pc_offset(); | |
1486 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1487 prev_offset = this_offset; | |
1488 } | |
1489 assert(prev_offset == PcDesc::upper_offset_limit, | |
1490 "must end with a sentinel"); | |
1491 #endif //ASSERT | |
1492 | |
1493 int size = count * sizeof(PcDesc); | |
1494 assert(scopes_pcs_size() >= size, "oob"); | |
1495 memcpy(scopes_pcs_begin(), pcs, size); | |
1496 | |
1497 // Adjust the final sentinel downward. | |
1498 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1499 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1500 last_pc->set_pc_offset(instructions_size() + 1); | |
1501 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { | |
1502 // Fill any rounding gaps with copies of the last record. | |
1503 last_pc[1] = last_pc[0]; | |
1504 } | |
1505 // The following assert could fail if sizeof(PcDesc) is not | |
1506 // an integral multiple of oopSize (the rounding term). | |
1507 // If it fails, change the logic to always allocate a multiple | |
1508 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1509 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1510 } | |
1511 | |
1512 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1513 assert(scopes_data_size() >= size, "oob"); | |
1514 memcpy(scopes_data_begin(), buffer, size); | |
1515 } | |
1516 | |
1517 | |
1518 #ifdef ASSERT | |
1519 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1520 PcDesc* lower = nm->scopes_pcs_begin(); | |
1521 PcDesc* upper = nm->scopes_pcs_end(); | |
1522 lower += 1; // exclude initial sentinel | |
1523 PcDesc* res = NULL; | |
1524 for (PcDesc* p = lower; p < upper; p++) { | |
1525 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1526 if (match_desc(p, pc_offset, approximate)) { | |
1527 if (res == NULL) | |
1528 res = p; | |
1529 else | |
1530 res = (PcDesc*) badAddress; | |
1531 } | |
1532 } | |
1533 return res; | |
1534 } | |
1535 #endif | |
1536 | |
1537 | |
1538 // Finds a PcDesc with real-pc equal to "pc" | |
1539 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1540 address base_address = instructions_begin(); | |
1541 if ((pc < base_address) || | |
1542 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1543 return NULL; // PC is wildly out of range | |
1544 } | |
1545 int pc_offset = (int) (pc - base_address); | |
1546 | |
1547 // Check the PcDesc cache if it contains the desired PcDesc | |
1548 // (This as an almost 100% hit rate.) | |
1549 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1550 if (res != NULL) { | |
1551 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1552 return res; | |
1553 } | |
1554 | |
1555 // Fallback algorithm: quasi-linear search for the PcDesc | |
1556 // Find the last pc_offset less than the given offset. | |
1557 // The successor must be the required match, if there is a match at all. | |
1558 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1559 PcDesc* lower = scopes_pcs_begin(); | |
1560 PcDesc* upper = scopes_pcs_end(); | |
1561 upper -= 1; // exclude final sentinel | |
1562 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1563 | |
1564 #define assert_LU_OK \ | |
1565 /* invariant on lower..upper during the following search: */ \ | |
1566 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1567 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1568 assert_LU_OK; | |
1569 | |
1570 // Use the last successful return as a split point. | |
1571 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
1572 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1573 if (mid->pc_offset() < pc_offset) { | |
1574 lower = mid; | |
1575 } else { | |
1576 upper = mid; | |
1577 } | |
1578 | |
1579 // Take giant steps at first (4096, then 256, then 16, then 1) | |
1580 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
1581 const int RADIX = (1 << LOG2_RADIX); | |
1582 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
1583 while ((mid = lower + step) < upper) { | |
1584 assert_LU_OK; | |
1585 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1586 if (mid->pc_offset() < pc_offset) { | |
1587 lower = mid; | |
1588 } else { | |
1589 upper = mid; | |
1590 break; | |
1591 } | |
1592 } | |
1593 assert_LU_OK; | |
1594 } | |
1595 | |
1596 // Sneak up on the value with a linear search of length ~16. | |
1597 while (true) { | |
1598 assert_LU_OK; | |
1599 mid = lower + 1; | |
1600 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1601 if (mid->pc_offset() < pc_offset) { | |
1602 lower = mid; | |
1603 } else { | |
1604 upper = mid; | |
1605 break; | |
1606 } | |
1607 } | |
1608 #undef assert_LU_OK | |
1609 | |
1610 if (match_desc(upper, pc_offset, approximate)) { | |
1611 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
1612 _pc_desc_cache.add_pc_desc(upper); | |
1613 return upper; | |
1614 } else { | |
1615 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
1616 return NULL; | |
1617 } | |
1618 } | |
1619 | |
1620 | |
1621 bool nmethod::check_all_dependencies() { | |
1622 bool found_check = false; | |
1623 // wholesale check of all dependencies | |
1624 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1625 if (deps.check_dependency() != NULL) { | |
1626 found_check = true; | |
1627 NOT_DEBUG(break); | |
1628 } | |
1629 } | |
1630 return found_check; // tell caller if we found anything | |
1631 } | |
1632 | |
1633 bool nmethod::check_dependency_on(DepChange& changes) { | |
1634 // What has happened: | |
1635 // 1) a new class dependee has been added | |
1636 // 2) dependee and all its super classes have been marked | |
1637 bool found_check = false; // set true if we are upset | |
1638 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1639 // Evaluate only relevant dependencies. | |
1640 if (deps.spot_check_dependency_at(changes) != NULL) { | |
1641 found_check = true; | |
1642 NOT_DEBUG(break); | |
1643 } | |
1644 } | |
1645 return found_check; | |
1646 } | |
1647 | |
1648 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
1649 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
1650 objArrayOop dependee_methods = dependee_ik->methods(); | |
1651 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1652 if (deps.type() == Dependencies::evol_method) { | |
1653 methodOop method = deps.method_argument(0); | |
1654 for (int j = 0; j < dependee_methods->length(); j++) { | |
1655 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
1656 // RC_TRACE macro has an embedded ResourceMark | |
1657 RC_TRACE(0x01000000, | |
1658 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
1659 _method->method_holder()->klass_part()->external_name(), | |
1660 _method->name()->as_C_string(), | |
1661 _method->signature()->as_C_string(), compile_id(), | |
1662 method->method_holder()->klass_part()->external_name(), | |
1663 method->name()->as_C_string(), | |
1664 method->signature()->as_C_string())); | |
1665 if (TraceDependencies || LogCompilation) | |
1666 deps.log_dependency(dependee); | |
1667 return true; | |
1668 } | |
1669 } | |
1670 } | |
1671 } | |
1672 return false; | |
1673 } | |
1674 | |
1675 // Called from mark_for_deoptimization, when dependee is invalidated. | |
1676 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
1677 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1678 if (deps.type() != Dependencies::evol_method) | |
1679 continue; | |
1680 methodOop method = deps.method_argument(0); | |
1681 if (method == dependee) return true; | |
1682 } | |
1683 return false; | |
1684 } | |
1685 | |
1686 | |
1687 bool nmethod::is_patchable_at(address instr_addr) { | |
1688 assert (code_contains(instr_addr), "wrong nmethod used"); | |
1689 if (is_zombie()) { | |
1690 // a zombie may never be patched | |
1691 return false; | |
1692 } | |
1693 return true; | |
1694 } | |
1695 | |
1696 | |
1697 address nmethod::continuation_for_implicit_exception(address pc) { | |
1698 // Exception happened outside inline-cache check code => we are inside | |
1699 // an active nmethod => use cpc to determine a return address | |
1700 int exception_offset = pc - instructions_begin(); | |
1701 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); | |
1702 #ifdef ASSERT | |
1703 if (cont_offset == 0) { | |
1704 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
1705 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
1706 HandleMark hm(thread); | |
1707 ResourceMark rm(thread); | |
1708 CodeBlob* cb = CodeCache::find_blob(pc); | |
1709 assert(cb != NULL && cb == this, ""); | |
1710 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
1711 print(); | |
1712 method()->print_codes(); | |
1713 print_code(); | |
1714 print_pcs(); | |
1715 } | |
1716 #endif | |
1717 guarantee(cont_offset != 0, "unhandled implicit exception in compiled code"); | |
1718 return instructions_begin() + cont_offset; | |
1719 } | |
1720 | |
1721 | |
1722 | |
1723 void nmethod_init() { | |
1724 // make sure you didn't forget to adjust the filler fields | |
1725 assert(sizeof(nmFlags) <= 4, "nmFlags occupies more than a word"); | |
1726 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
1727 } | |
1728 | |
1729 | |
1730 //------------------------------------------------------------------------------------------- | |
1731 | |
1732 | |
1733 // QQQ might we make this work from a frame?? | |
1734 nmethodLocker::nmethodLocker(address pc) { | |
1735 CodeBlob* cb = CodeCache::find_blob(pc); | |
1736 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
1737 _nm = (nmethod*)cb; | |
1738 lock_nmethod(_nm); | |
1739 } | |
1740 | |
1741 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
1742 if (nm == NULL) return; | |
1743 Atomic::inc(&nm->_lock_count); | |
1744 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
1745 } | |
1746 | |
1747 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
1748 if (nm == NULL) return; | |
1749 Atomic::dec(&nm->_lock_count); | |
1750 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
1751 } | |
1752 | |
1753 bool nmethod::is_deopt_pc(address pc) { | |
1754 bool ret = pc == deopt_handler_begin(); | |
1755 return ret; | |
1756 } | |
1757 | |
1758 | |
1759 // ----------------------------------------------------------------------------- | |
1760 // Verification | |
1761 | |
1762 void nmethod::verify() { | |
1763 | |
1764 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
1765 // seems odd. | |
1766 | |
1767 if( is_zombie() || is_not_entrant() ) | |
1768 return; | |
1769 | |
1770 // Make sure all the entry points are correctly aligned for patching. | |
1771 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
1772 | |
1773 assert(method()->is_oop(), "must be valid"); | |
1774 | |
1775 ResourceMark rm; | |
1776 | |
1777 if (!CodeCache::contains(this)) { | |
1778 fatal1("nmethod at " INTPTR_FORMAT " not in zone", this); | |
1779 } | |
1780 | |
1781 if(is_native_method() ) | |
1782 return; | |
1783 | |
1784 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
1785 if (nm != this) { | |
1786 fatal1("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", this); | |
1787 } | |
1788 | |
1789 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
1790 if (! p->verify(this)) { | |
1791 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
1792 } | |
1793 } | |
1794 | |
1795 verify_scopes(); | |
1796 } | |
1797 | |
1798 | |
1799 void nmethod::verify_interrupt_point(address call_site) { | |
1800 // This code does not work in release mode since | |
1801 // owns_lock only is available in debug mode. | |
1802 CompiledIC* ic = NULL; | |
1803 Thread *cur = Thread::current(); | |
1804 if (CompiledIC_lock->owner() == cur || | |
1805 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
1806 SafepointSynchronize::is_at_safepoint())) { | |
1807 ic = CompiledIC_at(call_site); | |
1808 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1809 } else { | |
1810 MutexLocker ml_verify (CompiledIC_lock); | |
1811 ic = CompiledIC_at(call_site); | |
1812 } | |
1813 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
1814 assert(pd != NULL, "PcDesc must exist"); | |
1815 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1816 pd->obj_decode_offset()); | |
1817 !sd->is_top(); sd = sd->sender()) { | |
1818 sd->verify(); | |
1819 } | |
1820 } | |
1821 | |
1822 void nmethod::verify_scopes() { | |
1823 if( !method() ) return; // Runtime stubs have no scope | |
1824 if (method()->is_native()) return; // Ignore stub methods. | |
1825 // iterate through all interrupt point | |
1826 // and verify the debug information is valid. | |
1827 RelocIterator iter((nmethod*)this); | |
1828 while (iter.next()) { | |
1829 address stub = NULL; | |
1830 switch (iter.type()) { | |
1831 case relocInfo::virtual_call_type: | |
1832 verify_interrupt_point(iter.addr()); | |
1833 break; | |
1834 case relocInfo::opt_virtual_call_type: | |
1835 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
1836 verify_interrupt_point(iter.addr()); | |
1837 break; | |
1838 case relocInfo::static_call_type: | |
1839 stub = iter.static_call_reloc()->static_stub(); | |
1840 //verify_interrupt_point(iter.addr()); | |
1841 break; | |
1842 case relocInfo::runtime_call_type: | |
1843 address destination = iter.reloc()->value(); | |
1844 // Right now there is no way to find out which entries support | |
1845 // an interrupt point. It would be nice if we had this | |
1846 // information in a table. | |
1847 break; | |
1848 } | |
1849 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
1850 } | |
1851 } | |
1852 | |
1853 | |
1854 // ----------------------------------------------------------------------------- | |
1855 // Non-product code | |
1856 #ifndef PRODUCT | |
1857 | |
1858 void nmethod::check_store() { | |
1859 // Make sure all oops in the compiled code are tenured | |
1860 | |
1861 RelocIterator iter(this); | |
1862 while (iter.next()) { | |
1863 if (iter.type() == relocInfo::oop_type) { | |
1864 oop_Relocation* reloc = iter.oop_reloc(); | |
1865 oop obj = reloc->oop_value(); | |
1866 if (obj != NULL && !obj->is_perm()) { | |
1867 fatal("must be permanent oop in compiled code"); | |
1868 } | |
1869 } | |
1870 } | |
1871 } | |
1872 | |
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1873 #endif // PRODUCT |
0 | 1874 |
1875 // Printing operations | |
1876 | |
1877 void nmethod::print() const { | |
1878 ResourceMark rm; | |
1879 ttyLocker ttyl; // keep the following output all in one block | |
1880 | |
1881 tty->print("Compiled "); | |
1882 | |
1883 if (is_compiled_by_c1()) { | |
1884 tty->print("(c1) "); | |
1885 } else if (is_compiled_by_c2()) { | |
1886 tty->print("(c2) "); | |
1887 } else { | |
1888 assert(is_native_method(), "Who else?"); | |
1889 tty->print("(nm) "); | |
1890 } | |
1891 | |
1892 print_on(tty, "nmethod"); | |
1893 tty->cr(); | |
1894 if (WizardMode) { | |
1895 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
1896 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
1897 tty->print(" { "); | |
1898 if (version()) tty->print("v%d ", version()); | |
1899 if (level()) tty->print("l%d ", level()); | |
1900 if (is_in_use()) tty->print("in_use "); | |
1901 if (is_not_entrant()) tty->print("not_entrant "); | |
1902 if (is_zombie()) tty->print("zombie "); | |
1903 if (is_unloaded()) tty->print("unloaded "); | |
1904 tty->print_cr("}:"); | |
1905 } | |
1906 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1907 (address)this, | |
1908 (address)this + size(), | |
1909 size()); | |
1910 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1911 relocation_begin(), | |
1912 relocation_end(), | |
1913 relocation_size()); | |
1914 if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1915 code_begin(), | |
1916 code_end(), | |
1917 code_size()); | |
1918 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1919 stub_begin(), | |
1920 stub_end(), | |
1921 stub_size()); | |
1922 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1923 consts_begin(), | |
1924 consts_end(), | |
1925 consts_size()); | |
1926 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1927 scopes_data_begin(), | |
1928 scopes_data_end(), | |
1929 scopes_data_size()); | |
1930 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1931 scopes_pcs_begin(), | |
1932 scopes_pcs_end(), | |
1933 scopes_pcs_size()); | |
1934 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1935 dependencies_begin(), | |
1936 dependencies_end(), | |
1937 dependencies_size()); | |
1938 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1939 handler_table_begin(), | |
1940 handler_table_end(), | |
1941 handler_table_size()); | |
1942 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1943 nul_chk_table_begin(), | |
1944 nul_chk_table_end(), | |
1945 nul_chk_table_size()); | |
1946 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
1947 oops_begin(), | |
1948 oops_end(), | |
1949 oops_size()); | |
1950 } | |
1951 | |
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1952 void nmethod::print_code() { |
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1953 HandleMark hm; |
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1954 ResourceMark m; |
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1955 Disassembler::decode(this); |
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1956 } |
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1957 |
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1958 |
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1959 #ifndef PRODUCT |
0 | 1960 |
1961 void nmethod::print_scopes() { | |
1962 // Find the first pc desc for all scopes in the code and print it. | |
1963 ResourceMark rm; | |
1964 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
1965 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
1966 continue; | |
1967 | |
1968 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
1969 sd->print_on(tty, p); | |
1970 } | |
1971 } | |
1972 | |
1973 void nmethod::print_dependencies() { | |
1974 ResourceMark rm; | |
1975 ttyLocker ttyl; // keep the following output all in one block | |
1976 tty->print_cr("Dependencies:"); | |
1977 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1978 deps.print_dependency(); | |
1979 klassOop ctxk = deps.context_type(); | |
1980 if (ctxk != NULL) { | |
1981 Klass* k = Klass::cast(ctxk); | |
1982 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 1983 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 1984 } |
1985 } | |
1986 deps.log_dependency(); // put it into the xml log also | |
1987 } | |
1988 } | |
1989 | |
1990 | |
1991 void nmethod::print_relocations() { | |
1992 ResourceMark m; // in case methods get printed via the debugger | |
1993 tty->print_cr("relocations:"); | |
1994 RelocIterator iter(this); | |
1995 iter.print(); | |
1996 if (UseRelocIndex) { | |
1997 jint* index_end = (jint*)relocation_end() - 1; | |
1998 jint index_size = *index_end; | |
1999 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2000 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2001 if (index_size > 0) { | |
2002 jint* ip; | |
2003 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2004 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2005 ip[0], | |
2006 ip[1], | |
2007 header_end()+ip[0], | |
2008 relocation_begin()-1+ip[1]); | |
2009 for (; ip < index_end; ip++) | |
2010 tty->print_cr(" (%d ?)", ip[0]); | |
2011 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2012 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2013 } | |
2014 } | |
2015 } | |
2016 | |
2017 | |
2018 void nmethod::print_pcs() { | |
2019 ResourceMark m; // in case methods get printed via debugger | |
2020 tty->print_cr("pc-bytecode offsets:"); | |
2021 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2022 p->print(this); | |
2023 } | |
2024 } | |
2025 | |
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2026 #endif // PRODUCT |
0 | 2027 |
2028 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2029 RelocIterator iter(this, begin, end); | |
2030 bool have_one = false; | |
2031 while (iter.next()) { | |
2032 have_one = true; | |
2033 switch (iter.type()) { | |
2034 case relocInfo::none: return "no_reloc"; | |
2035 case relocInfo::oop_type: { | |
2036 stringStream st; | |
2037 oop_Relocation* r = iter.oop_reloc(); | |
2038 oop obj = r->oop_value(); | |
2039 st.print("oop("); | |
2040 if (obj == NULL) st.print("NULL"); | |
2041 else obj->print_value_on(&st); | |
2042 st.print(")"); | |
2043 return st.as_string(); | |
2044 } | |
2045 case relocInfo::virtual_call_type: return "virtual_call"; | |
2046 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2047 case relocInfo::static_call_type: return "static_call"; | |
2048 case relocInfo::static_stub_type: return "static_stub"; | |
2049 case relocInfo::runtime_call_type: return "runtime_call"; | |
2050 case relocInfo::external_word_type: return "external_word"; | |
2051 case relocInfo::internal_word_type: return "internal_word"; | |
2052 case relocInfo::section_word_type: return "section_word"; | |
2053 case relocInfo::poll_type: return "poll"; | |
2054 case relocInfo::poll_return_type: return "poll_return"; | |
2055 case relocInfo::type_mask: return "type_bit_mask"; | |
2056 } | |
2057 } | |
2058 return have_one ? "other" : NULL; | |
2059 } | |
2060 | |
2061 // Return a the last scope in (begin..end] | |
2062 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2063 PcDesc* p = pc_desc_near(begin+1); | |
2064 if (p != NULL && p->real_pc(this) <= end) { | |
2065 return new ScopeDesc(this, p->scope_decode_offset(), | |
2066 p->obj_decode_offset()); | |
2067 } | |
2068 return NULL; | |
2069 } | |
2070 | |
2071 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { | |
2072 // First, find an oopmap in (begin, end]. | |
2073 // We use the odd half-closed interval so that oop maps and scope descs | |
2074 // which are tied to the byte after a call are printed with the call itself. | |
2075 address base = instructions_begin(); | |
2076 OopMapSet* oms = oop_maps(); | |
2077 if (oms != NULL) { | |
2078 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2079 OopMap* om = oms->at(i); | |
2080 address pc = base + om->offset(); | |
2081 if (pc > begin) { | |
2082 if (pc <= end) { | |
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2083 st->move_to(column); |
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2084 st->print("; "); |
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2085 om->print_on(st); |
0 | 2086 } |
2087 break; | |
2088 } | |
2089 } | |
2090 } | |
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2091 |
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2092 // Print any debug info present at this pc. |
0 | 2093 ScopeDesc* sd = scope_desc_in(begin, end); |
2094 if (sd != NULL) { | |
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2095 st->move_to(column); |
0 | 2096 if (sd->bci() == SynchronizationEntryBCI) { |
2097 st->print(";*synchronization entry"); | |
2098 } else { | |
2099 if (sd->method().is_null()) { | |
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2100 st->print("method is NULL"); |
0 | 2101 } else if (sd->method()->is_native()) { |
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2102 st->print("method is native"); |
0 | 2103 } else { |
2104 address bcp = sd->method()->bcp_from(sd->bci()); | |
2105 Bytecodes::Code bc = Bytecodes::java_code_at(bcp); | |
2106 st->print(";*%s", Bytecodes::name(bc)); | |
2107 switch (bc) { | |
2108 case Bytecodes::_invokevirtual: | |
2109 case Bytecodes::_invokespecial: | |
2110 case Bytecodes::_invokestatic: | |
2111 case Bytecodes::_invokeinterface: | |
2112 { | |
2113 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); | |
2114 st->print(" "); | |
2115 if (invoke->name() != NULL) | |
2116 invoke->name()->print_symbol_on(st); | |
2117 else | |
2118 st->print("<UNKNOWN>"); | |
2119 break; | |
2120 } | |
2121 case Bytecodes::_getfield: | |
2122 case Bytecodes::_putfield: | |
2123 case Bytecodes::_getstatic: | |
2124 case Bytecodes::_putstatic: | |
2125 { | |
2126 methodHandle sdm = sd->method(); | |
2127 Bytecode_field* field = Bytecode_field_at(sdm(), sdm->bcp_from(sd->bci())); | |
2128 constantPoolOop sdmc = sdm->constants(); | |
2129 symbolOop name = sdmc->name_ref_at(field->index()); | |
2130 st->print(" "); | |
2131 if (name != NULL) | |
2132 name->print_symbol_on(st); | |
2133 else | |
2134 st->print("<UNKNOWN>"); | |
2135 } | |
2136 } | |
2137 } | |
2138 } | |
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2139 |
0 | 2140 // Print all scopes |
2141 for (;sd != NULL; sd = sd->sender()) { | |
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2142 st->move_to(column); |
0 | 2143 st->print("; -"); |
2144 if (sd->method().is_null()) { | |
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2145 st->print("method is NULL"); |
0 | 2146 } else { |
2147 sd->method()->print_short_name(st); | |
2148 } | |
2149 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2150 if (lineno != -1) { | |
2151 st->print("@%d (line %d)", sd->bci(), lineno); | |
2152 } else { | |
2153 st->print("@%d", sd->bci()); | |
2154 } | |
2155 st->cr(); | |
2156 } | |
2157 } | |
2158 | |
2159 // Print relocation information | |
2160 const char* str = reloc_string_for(begin, end); | |
2161 if (str != NULL) { | |
2162 if (sd != NULL) st->cr(); | |
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2163 st->move_to(column); |
0 | 2164 st->print("; {%s}", str); |
2165 } | |
2166 int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); | |
2167 if (cont_offset != 0) { | |
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2168 st->move_to(column); |
0 | 2169 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); |
2170 } | |
2171 | |
2172 } | |
2173 | |
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2174 #ifndef PRODUCT |
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2175 |
0 | 2176 void nmethod::print_value_on(outputStream* st) const { |
2177 print_on(st, "nmethod"); | |
2178 } | |
2179 | |
2180 void nmethod::print_calls(outputStream* st) { | |
2181 RelocIterator iter(this); | |
2182 while (iter.next()) { | |
2183 switch (iter.type()) { | |
2184 case relocInfo::virtual_call_type: | |
2185 case relocInfo::opt_virtual_call_type: { | |
2186 VerifyMutexLocker mc(CompiledIC_lock); | |
2187 CompiledIC_at(iter.reloc())->print(); | |
2188 break; | |
2189 } | |
2190 case relocInfo::static_call_type: | |
2191 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2192 compiledStaticCall_at(iter.reloc())->print(); | |
2193 break; | |
2194 } | |
2195 } | |
2196 } | |
2197 | |
2198 void nmethod::print_handler_table() { | |
2199 ExceptionHandlerTable(this).print(); | |
2200 } | |
2201 | |
2202 void nmethod::print_nul_chk_table() { | |
2203 ImplicitExceptionTable(this).print(instructions_begin()); | |
2204 } | |
2205 | |
2206 void nmethod::print_statistics() { | |
2207 ttyLocker ttyl; | |
2208 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2209 nmethod_stats.print_native_nmethod_stats(); | |
2210 nmethod_stats.print_nmethod_stats(); | |
2211 DebugInformationRecorder::print_statistics(); | |
2212 nmethod_stats.print_pc_stats(); | |
2213 Dependencies::print_statistics(); | |
2214 if (xtty != NULL) xtty->tail("statistics"); | |
2215 } | |
2216 | |
2217 #endif // PRODUCT |