Mercurial > hg > graal-compiler
annotate src/share/vm/code/nmethod.cpp @ 1644:2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
Reviewed-by: kvn
author | never |
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date | Thu, 08 Jul 2010 14:29:44 -0700 |
parents | 38e8278318ca |
children | 4a665be40fd3 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_nmethod.cpp.incl" | |
27 | |
28 #ifdef DTRACE_ENABLED | |
29 | |
30 // Only bother with this argument setup if dtrace is available | |
31 | |
32 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
33 const char*, int, const char*, int, const char*, int, void*, size_t); | |
34 | |
35 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
36 char*, int, char*, int, char*, int); | |
37 | |
38 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
39 { \ | |
40 methodOop m = (method); \ | |
41 if (m != NULL) { \ | |
42 symbolOop klass_name = m->klass_name(); \ | |
43 symbolOop name = m->name(); \ | |
44 symbolOop signature = m->signature(); \ | |
45 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ | |
46 klass_name->bytes(), klass_name->utf8_length(), \ | |
47 name->bytes(), name->utf8_length(), \ | |
48 signature->bytes(), signature->utf8_length()); \ | |
49 } \ | |
50 } | |
51 | |
52 #else // ndef DTRACE_ENABLED | |
53 | |
54 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
55 | |
56 #endif | |
57 | |
58 bool nmethod::is_compiled_by_c1() const { | |
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59 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 60 if (is_native_method()) return false; |
61 return compiler()->is_c1(); | |
62 } | |
63 bool nmethod::is_compiled_by_c2() const { | |
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64 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 65 if (is_native_method()) return false; |
66 return compiler()->is_c2(); | |
67 } | |
68 | |
69 | |
70 | |
71 //--------------------------------------------------------------------------------- | |
72 // NMethod statistics | |
73 // They are printed under various flags, including: | |
74 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
75 // (In the latter two cases, they like other stats are printed to the log only.) | |
76 | |
77 #ifndef PRODUCT | |
78 // These variables are put into one block to reduce relocations | |
79 // and make it simpler to print from the debugger. | |
80 static | |
81 struct nmethod_stats_struct { | |
82 int nmethod_count; | |
83 int total_size; | |
84 int relocation_size; | |
85 int code_size; | |
86 int stub_size; | |
87 int consts_size; | |
88 int scopes_data_size; | |
89 int scopes_pcs_size; | |
90 int dependencies_size; | |
91 int handler_table_size; | |
92 int nul_chk_table_size; | |
93 int oops_size; | |
94 | |
95 void note_nmethod(nmethod* nm) { | |
96 nmethod_count += 1; | |
97 total_size += nm->size(); | |
98 relocation_size += nm->relocation_size(); | |
99 code_size += nm->code_size(); | |
100 stub_size += nm->stub_size(); | |
101 consts_size += nm->consts_size(); | |
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102 oops_size += nm->oops_size(); |
0 | 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 } | |
109 void print_nmethod_stats() { | |
110 if (nmethod_count == 0) return; | |
111 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
112 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
113 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
114 if (code_size != 0) tty->print_cr(" main code = %d", code_size); | |
115 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); | |
116 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); | |
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117 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 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 } | |
124 | |
125 int native_nmethod_count; | |
126 int native_total_size; | |
127 int native_relocation_size; | |
128 int native_code_size; | |
129 int native_oops_size; | |
130 void note_native_nmethod(nmethod* nm) { | |
131 native_nmethod_count += 1; | |
132 native_total_size += nm->size(); | |
133 native_relocation_size += nm->relocation_size(); | |
134 native_code_size += nm->code_size(); | |
135 native_oops_size += nm->oops_size(); | |
136 } | |
137 void print_native_nmethod_stats() { | |
138 if (native_nmethod_count == 0) return; | |
139 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
140 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
141 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
142 if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size); | |
143 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); | |
144 } | |
145 | |
146 int pc_desc_resets; // number of resets (= number of caches) | |
147 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
148 int pc_desc_approx; // number of those which have approximate true | |
149 int pc_desc_repeats; // number of _last_pc_desc hits | |
150 int pc_desc_hits; // number of LRU cache hits | |
151 int pc_desc_tests; // total number of PcDesc examinations | |
152 int pc_desc_searches; // total number of quasi-binary search steps | |
153 int pc_desc_adds; // number of LUR cache insertions | |
154 | |
155 void print_pc_stats() { | |
156 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
157 pc_desc_queries, | |
158 (double)(pc_desc_tests + pc_desc_searches) | |
159 / pc_desc_queries); | |
160 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
161 pc_desc_resets, | |
162 pc_desc_queries, pc_desc_approx, | |
163 pc_desc_repeats, pc_desc_hits, | |
164 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
165 } | |
166 } nmethod_stats; | |
167 #endif //PRODUCT | |
168 | |
169 //--------------------------------------------------------------------------------- | |
170 | |
171 | |
172 // The _unwind_handler is a special marker address, which says that | |
173 // for given exception oop and address, the frame should be removed | |
174 // as the tuple cannot be caught in the nmethod | |
175 address ExceptionCache::_unwind_handler = (address) -1; | |
176 | |
177 | |
178 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
179 assert(pc != NULL, "Must be non null"); | |
180 assert(exception.not_null(), "Must be non null"); | |
181 assert(handler != NULL, "Must be non null"); | |
182 | |
183 _count = 0; | |
184 _exception_type = exception->klass(); | |
185 _next = NULL; | |
186 | |
187 add_address_and_handler(pc,handler); | |
188 } | |
189 | |
190 | |
191 address ExceptionCache::match(Handle exception, address pc) { | |
192 assert(pc != NULL,"Must be non null"); | |
193 assert(exception.not_null(),"Must be non null"); | |
194 if (exception->klass() == exception_type()) { | |
195 return (test_address(pc)); | |
196 } | |
197 | |
198 return NULL; | |
199 } | |
200 | |
201 | |
202 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
203 assert(exception.not_null(),"Must be non null"); | |
204 if (exception->klass() == exception_type() && count() < cache_size) { | |
205 return true; | |
206 } | |
207 return false; | |
208 } | |
209 | |
210 | |
211 address ExceptionCache::test_address(address addr) { | |
212 for (int i=0; i<count(); i++) { | |
213 if (pc_at(i) == addr) { | |
214 return handler_at(i); | |
215 } | |
216 } | |
217 return NULL; | |
218 } | |
219 | |
220 | |
221 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
222 if (test_address(addr) == handler) return true; | |
223 if (count() < cache_size) { | |
224 set_pc_at(count(),addr); | |
225 set_handler_at(count(), handler); | |
226 increment_count(); | |
227 return true; | |
228 } | |
229 return false; | |
230 } | |
231 | |
232 | |
233 // private method for handling exception cache | |
234 // These methods are private, and used to manipulate the exception cache | |
235 // directly. | |
236 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
237 ExceptionCache* ec = exception_cache(); | |
238 while (ec != NULL) { | |
239 if (ec->match_exception_with_space(exception)) { | |
240 return ec; | |
241 } | |
242 ec = ec->next(); | |
243 } | |
244 return NULL; | |
245 } | |
246 | |
247 | |
248 //----------------------------------------------------------------------------- | |
249 | |
250 | |
251 // Helper used by both find_pc_desc methods. | |
252 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
253 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
254 if (!approximate) | |
255 return pc->pc_offset() == pc_offset; | |
256 else | |
257 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
258 } | |
259 | |
260 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
261 if (initial_pc_desc == NULL) { | |
262 _last_pc_desc = NULL; // native method | |
263 return; | |
264 } | |
265 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
266 // reset the cache by filling it with benign (non-null) values | |
267 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
268 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
269 for (int i = 0; i < cache_size; i++) | |
270 _pc_descs[i] = initial_pc_desc; | |
271 } | |
272 | |
273 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
274 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
275 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
276 | |
277 // In order to prevent race conditions do not load cache elements | |
278 // repeatedly, but use a local copy: | |
279 PcDesc* res; | |
280 | |
281 // Step one: Check the most recently returned value. | |
282 res = _last_pc_desc; | |
283 if (res == NULL) return NULL; // native method; no PcDescs at all | |
284 if (match_desc(res, pc_offset, approximate)) { | |
285 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
286 return res; | |
287 } | |
288 | |
289 // Step two: Check the LRU cache. | |
290 for (int i = 0; i < cache_size; i++) { | |
291 res = _pc_descs[i]; | |
292 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
293 if (match_desc(res, pc_offset, approximate)) { | |
294 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
295 _last_pc_desc = res; // record this cache hit in case of repeat | |
296 return res; | |
297 } | |
298 } | |
299 | |
300 // Report failure. | |
301 return NULL; | |
302 } | |
303 | |
304 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
305 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
306 // Update the LRU cache by shifting pc_desc forward: | |
307 for (int i = 0; i < cache_size; i++) { | |
308 PcDesc* next = _pc_descs[i]; | |
309 _pc_descs[i] = pc_desc; | |
310 pc_desc = next; | |
311 } | |
312 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
313 } | |
314 | |
315 // adjust pcs_size so that it is a multiple of both oopSize and | |
316 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
317 // of oopSize, then 2*sizeof(PcDesc) is) | |
318 static int adjust_pcs_size(int pcs_size) { | |
319 int nsize = round_to(pcs_size, oopSize); | |
320 if ((nsize % sizeof(PcDesc)) != 0) { | |
321 nsize = pcs_size + sizeof(PcDesc); | |
322 } | |
323 assert((nsize % oopSize) == 0, "correct alignment"); | |
324 return nsize; | |
325 } | |
326 | |
327 //----------------------------------------------------------------------------- | |
328 | |
329 | |
330 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
331 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
332 assert(new_entry != NULL,"Must be non null"); | |
333 assert(new_entry->next() == NULL, "Must be null"); | |
334 | |
335 if (exception_cache() != NULL) { | |
336 new_entry->set_next(exception_cache()); | |
337 } | |
338 set_exception_cache(new_entry); | |
339 } | |
340 | |
341 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
342 ExceptionCache* prev = NULL; | |
343 ExceptionCache* curr = exception_cache(); | |
344 assert(curr != NULL, "nothing to remove"); | |
345 // find the previous and next entry of ec | |
346 while (curr != ec) { | |
347 prev = curr; | |
348 curr = curr->next(); | |
349 assert(curr != NULL, "ExceptionCache not found"); | |
350 } | |
351 // now: curr == ec | |
352 ExceptionCache* next = curr->next(); | |
353 if (prev == NULL) { | |
354 set_exception_cache(next); | |
355 } else { | |
356 prev->set_next(next); | |
357 } | |
358 delete curr; | |
359 } | |
360 | |
361 | |
362 // public method for accessing the exception cache | |
363 // These are the public access methods. | |
364 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
365 // We never grab a lock to read the exception cache, so we may | |
366 // have false negatives. This is okay, as it can only happen during | |
367 // the first few exception lookups for a given nmethod. | |
368 ExceptionCache* ec = exception_cache(); | |
369 while (ec != NULL) { | |
370 address ret_val; | |
371 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
372 return ret_val; | |
373 } | |
374 ec = ec->next(); | |
375 } | |
376 return NULL; | |
377 } | |
378 | |
379 | |
380 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
381 // There are potential race conditions during exception cache updates, so we | |
382 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 383 // we don't lock during reads, it is possible to have several threads attempt |
0 | 384 // to update the cache with the same data. We need to check for already inserted |
385 // copies of the current data before adding it. | |
386 | |
387 MutexLocker ml(ExceptionCache_lock); | |
388 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
389 | |
390 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
391 target_entry = new ExceptionCache(exception,pc,handler); | |
392 add_exception_cache_entry(target_entry); | |
393 } | |
394 } | |
395 | |
396 | |
397 //-------------end of code for ExceptionCache-------------- | |
398 | |
399 | |
400 int nmethod::total_size() const { | |
401 return | |
402 code_size() + | |
403 stub_size() + | |
404 consts_size() + | |
405 scopes_data_size() + | |
406 scopes_pcs_size() + | |
407 handler_table_size() + | |
408 nul_chk_table_size(); | |
409 } | |
410 | |
411 const char* nmethod::compile_kind() const { | |
412 if (is_osr_method()) return "osr"; | |
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413 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 414 return NULL; |
415 } | |
416 | |
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417 // Fill in default values for various flag fields |
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418 void nmethod::init_defaults() { |
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419 _state = alive; |
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420 _marked_for_reclamation = 0; |
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421 _has_flushed_dependencies = 0; |
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422 _speculatively_disconnected = 0; |
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423 _has_unsafe_access = 0; |
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424 _has_method_handle_invokes = 0; |
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425 _marked_for_deoptimization = 0; |
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426 _lock_count = 0; |
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427 _stack_traversal_mark = 0; |
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428 _unload_reported = false; // jvmti state |
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429 |
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430 NOT_PRODUCT(_has_debug_info = false); |
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431 _oops_do_mark_link = NULL; |
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432 _jmethod_id = NULL; |
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433 _osr_link = NULL; |
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434 _scavenge_root_link = NULL; |
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435 _scavenge_root_state = 0; |
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436 _saved_nmethod_link = NULL; |
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437 _compiler = NULL; |
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438 |
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439 #ifdef HAVE_DTRACE_H |
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440 _trap_offset = 0; |
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441 #endif // def HAVE_DTRACE_H |
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442 } |
0 | 443 |
444 | |
445 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
446 CodeBuffer *code_buffer, | |
447 int vep_offset, | |
448 int frame_complete, | |
449 int frame_size, | |
450 ByteSize basic_lock_owner_sp_offset, | |
451 ByteSize basic_lock_sp_offset, | |
452 OopMapSet* oop_maps) { | |
453 // create nmethod | |
454 nmethod* nm = NULL; | |
455 { | |
456 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
457 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
458 CodeOffsets offsets; | |
459 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
460 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
461 nm = new (native_nmethod_size) | |
462 nmethod(method(), native_nmethod_size, &offsets, | |
463 code_buffer, frame_size, | |
464 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
465 oop_maps); | |
466 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
467 if (PrintAssembly && nm != NULL) | |
468 Disassembler::decode(nm); | |
469 } | |
470 // verify nmethod | |
471 debug_only(if (nm) nm->verify();) // might block | |
472 | |
473 if (nm != NULL) { | |
474 nm->log_new_nmethod(); | |
475 } | |
476 | |
477 return nm; | |
478 } | |
479 | |
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480 #ifdef HAVE_DTRACE_H |
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481 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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482 CodeBuffer *code_buffer, |
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483 int vep_offset, |
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484 int trap_offset, |
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485 int frame_complete, |
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486 int frame_size) { |
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487 // create nmethod |
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488 nmethod* nm = NULL; |
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489 { |
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490 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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491 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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492 CodeOffsets offsets; |
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493 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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494 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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495 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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496 |
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497 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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498 |
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499 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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500 if (PrintAssembly && nm != NULL) |
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501 Disassembler::decode(nm); |
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502 } |
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503 // verify nmethod |
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504 debug_only(if (nm) nm->verify();) // might block |
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505 |
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506 if (nm != NULL) { |
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507 nm->log_new_nmethod(); |
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508 } |
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509 |
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510 return nm; |
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511 } |
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512 |
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513 #endif // def HAVE_DTRACE_H |
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514 |
0 | 515 nmethod* nmethod::new_nmethod(methodHandle method, |
516 int compile_id, | |
517 int entry_bci, | |
518 CodeOffsets* offsets, | |
519 int orig_pc_offset, | |
520 DebugInformationRecorder* debug_info, | |
521 Dependencies* dependencies, | |
522 CodeBuffer* code_buffer, int frame_size, | |
523 OopMapSet* oop_maps, | |
524 ExceptionHandlerTable* handler_table, | |
525 ImplicitExceptionTable* nul_chk_table, | |
526 AbstractCompiler* compiler, | |
527 int comp_level | |
528 ) | |
529 { | |
530 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
531 // create nmethod | |
532 nmethod* nm = NULL; | |
533 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
534 int nmethod_size = | |
535 allocation_size(code_buffer, sizeof(nmethod)) | |
536 + adjust_pcs_size(debug_info->pcs_size()) | |
537 + round_to(dependencies->size_in_bytes() , oopSize) | |
538 + round_to(handler_table->size_in_bytes(), oopSize) | |
539 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
540 + round_to(debug_info->data_size() , oopSize); | |
541 nm = new (nmethod_size) | |
542 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
543 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
544 oop_maps, | |
545 handler_table, | |
546 nul_chk_table, | |
547 compiler, | |
548 comp_level); | |
549 if (nm != NULL) { | |
550 // To make dependency checking during class loading fast, record | |
551 // the nmethod dependencies in the classes it is dependent on. | |
552 // This allows the dependency checking code to simply walk the | |
553 // class hierarchy above the loaded class, checking only nmethods | |
554 // which are dependent on those classes. The slow way is to | |
555 // check every nmethod for dependencies which makes it linear in | |
556 // the number of methods compiled. For applications with a lot | |
557 // classes the slow way is too slow. | |
558 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
559 klassOop klass = deps.context_type(); | |
560 if (klass == NULL) continue; // ignore things like evol_method | |
561 | |
562 // record this nmethod as dependent on this klass | |
563 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
564 } | |
565 } | |
566 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
567 if (PrintAssembly && nm != NULL) | |
568 Disassembler::decode(nm); | |
569 } | |
570 | |
571 // verify nmethod | |
572 debug_only(if (nm) nm->verify();) // might block | |
573 | |
574 if (nm != NULL) { | |
575 nm->log_new_nmethod(); | |
576 } | |
577 | |
578 // done | |
579 return nm; | |
580 } | |
581 | |
582 | |
583 // For native wrappers | |
584 nmethod::nmethod( | |
585 methodOop method, | |
586 int nmethod_size, | |
587 CodeOffsets* offsets, | |
588 CodeBuffer* code_buffer, | |
589 int frame_size, | |
590 ByteSize basic_lock_owner_sp_offset, | |
591 ByteSize basic_lock_sp_offset, | |
592 OopMapSet* oop_maps ) | |
593 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
594 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
595 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), | |
596 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) | |
597 { | |
598 { | |
599 debug_only(No_Safepoint_Verifier nsv;) | |
600 assert_locked_or_safepoint(CodeCache_lock); | |
601 | |
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602 init_defaults(); |
0 | 603 _method = method; |
604 _entry_bci = InvocationEntryBci; | |
605 // We have no exception handler or deopt handler make the | |
606 // values something that will never match a pc like the nmethod vtable entry | |
607 _exception_offset = 0; | |
608 _deoptimize_offset = 0; | |
1204 | 609 _deoptimize_mh_offset = 0; |
0 | 610 _orig_pc_offset = 0; |
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611 |
0 | 612 _stub_offset = data_offset(); |
613 _consts_offset = data_offset(); | |
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614 _oops_offset = data_offset(); |
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615 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 616 _scopes_pcs_offset = _scopes_data_offset; |
617 _dependencies_offset = _scopes_pcs_offset; | |
618 _handler_table_offset = _dependencies_offset; | |
619 _nul_chk_table_offset = _handler_table_offset; | |
620 _nmethod_end_offset = _nul_chk_table_offset; | |
621 _compile_id = 0; // default | |
622 _comp_level = CompLevel_none; | |
623 _entry_point = instructions_begin(); | |
624 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
625 _osr_entry_point = NULL; | |
626 _exception_cache = NULL; | |
627 _pc_desc_cache.reset_to(NULL); | |
628 | |
629 code_buffer->copy_oops_to(this); | |
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630 debug_only(verify_scavenge_root_oops()); |
0 | 631 CodeCache::commit(this); |
632 } | |
633 | |
634 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
635 ttyLocker ttyl; // keep the following output all in one block | |
636 // This output goes directly to the tty, not the compiler log. | |
637 // To enable tools to match it up with the compilation activity, | |
638 // be sure to tag this tty output with the compile ID. | |
639 if (xtty != NULL) { | |
640 xtty->begin_head("print_native_nmethod"); | |
641 xtty->method(_method); | |
642 xtty->stamp(); | |
643 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
644 } | |
645 // print the header part first | |
646 print(); | |
647 // then print the requested information | |
648 if (PrintNativeNMethods) { | |
649 print_code(); | |
650 oop_maps->print(); | |
651 } | |
652 if (PrintRelocations) { | |
653 print_relocations(); | |
654 } | |
655 if (xtty != NULL) { | |
656 xtty->tail("print_native_nmethod"); | |
657 } | |
658 } | |
659 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
660 } | |
661 | |
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662 // For dtrace wrappers |
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663 #ifdef HAVE_DTRACE_H |
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664 nmethod::nmethod( |
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665 methodOop method, |
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666 int nmethod_size, |
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667 CodeOffsets* offsets, |
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668 CodeBuffer* code_buffer, |
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669 int frame_size) |
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670 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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671 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
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672 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
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673 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
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674 { |
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675 { |
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676 debug_only(No_Safepoint_Verifier nsv;) |
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677 assert_locked_or_safepoint(CodeCache_lock); |
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678 |
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679 init_defaults(); |
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680 _method = method; |
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681 _entry_bci = InvocationEntryBci; |
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682 // We have no exception handler or deopt handler make the |
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683 // values something that will never match a pc like the nmethod vtable entry |
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684 _exception_offset = 0; |
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685 _deoptimize_offset = 0; |
1204 | 686 _deoptimize_mh_offset = 0; |
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687 _unwind_handler_offset = -1; |
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688 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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689 _orig_pc_offset = 0; |
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690 _stub_offset = data_offset(); |
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691 _consts_offset = data_offset(); |
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692 _oops_offset = data_offset(); |
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693 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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694 _scopes_pcs_offset = _scopes_data_offset; |
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695 _dependencies_offset = _scopes_pcs_offset; |
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696 _handler_table_offset = _dependencies_offset; |
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697 _nul_chk_table_offset = _handler_table_offset; |
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698 _nmethod_end_offset = _nul_chk_table_offset; |
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699 _compile_id = 0; // default |
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700 _comp_level = CompLevel_none; |
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701 _entry_point = instructions_begin(); |
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702 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
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703 _osr_entry_point = NULL; |
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704 _exception_cache = NULL; |
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705 _pc_desc_cache.reset_to(NULL); |
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706 |
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707 code_buffer->copy_oops_to(this); |
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708 debug_only(verify_scavenge_root_oops()); |
116
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709 CodeCache::commit(this); |
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710 } |
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711 |
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712 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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713 ttyLocker ttyl; // keep the following output all in one block |
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714 // This output goes directly to the tty, not the compiler log. |
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715 // To enable tools to match it up with the compilation activity, |
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716 // be sure to tag this tty output with the compile ID. |
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717 if (xtty != NULL) { |
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718 xtty->begin_head("print_dtrace_nmethod"); |
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719 xtty->method(_method); |
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720 xtty->stamp(); |
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721 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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722 } |
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723 // print the header part first |
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724 print(); |
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725 // then print the requested information |
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726 if (PrintNMethods) { |
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727 print_code(); |
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728 } |
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729 if (PrintRelocations) { |
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730 print_relocations(); |
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731 } |
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732 if (xtty != NULL) { |
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733 xtty->tail("print_dtrace_nmethod"); |
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734 } |
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735 } |
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736 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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737 } |
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738 #endif // def HAVE_DTRACE_H |
0 | 739 |
740 void* nmethod::operator new(size_t size, int nmethod_size) { | |
741 // Always leave some room in the CodeCache for I2C/C2I adapters | |
742 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
743 return CodeCache::allocate(nmethod_size); | |
744 } | |
745 | |
746 | |
747 nmethod::nmethod( | |
748 methodOop method, | |
749 int nmethod_size, | |
750 int compile_id, | |
751 int entry_bci, | |
752 CodeOffsets* offsets, | |
753 int orig_pc_offset, | |
754 DebugInformationRecorder* debug_info, | |
755 Dependencies* dependencies, | |
756 CodeBuffer *code_buffer, | |
757 int frame_size, | |
758 OopMapSet* oop_maps, | |
759 ExceptionHandlerTable* handler_table, | |
760 ImplicitExceptionTable* nul_chk_table, | |
761 AbstractCompiler* compiler, | |
762 int comp_level | |
763 ) | |
764 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
765 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
766 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), | |
767 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) | |
768 { | |
769 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
770 { | |
771 debug_only(No_Safepoint_Verifier nsv;) | |
772 assert_locked_or_safepoint(CodeCache_lock); | |
773 | |
1644
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774 init_defaults(); |
0 | 775 _method = method; |
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776 _entry_bci = entry_bci; |
0 | 777 _compile_id = compile_id; |
778 _comp_level = comp_level; | |
779 _compiler = compiler; | |
780 _orig_pc_offset = orig_pc_offset; | |
781 _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); | |
782 | |
783 // Exception handler and deopt handler are in the stub section | |
784 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); | |
785 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
1204 | 786 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
1378
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787 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
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788 _unwind_handler_offset = instructions_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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789 } else { |
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790 _unwind_handler_offset = -1; |
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791 } |
0 | 792 _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); |
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793 _oops_offset = data_offset(); |
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794 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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795 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 796 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
797 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
798 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
799 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
800 | |
801 _entry_point = instructions_begin(); | |
802 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
803 _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
804 _exception_cache = NULL; | |
805 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
806 | |
807 // Copy contents of ScopeDescRecorder to nmethod | |
808 code_buffer->copy_oops_to(this); | |
809 debug_info->copy_to(this); | |
810 dependencies->copy_to(this); | |
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811 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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812 CodeCache::add_scavenge_root_nmethod(this); |
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813 } |
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814 debug_only(verify_scavenge_root_oops()); |
0 | 815 |
816 CodeCache::commit(this); | |
817 | |
818 // Copy contents of ExceptionHandlerTable to nmethod | |
819 handler_table->copy_to(this); | |
820 nul_chk_table->copy_to(this); | |
821 | |
822 // we use the information of entry points to find out if a method is | |
823 // static or non static | |
824 assert(compiler->is_c2() || | |
825 _method->is_static() == (entry_point() == _verified_entry_point), | |
826 " entry points must be same for static methods and vice versa"); | |
827 } | |
828 | |
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829 bool printnmethods = PrintNMethods |
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830 || CompilerOracle::should_print(_method) |
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831 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 832 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
833 print_nmethod(printnmethods); | |
834 } | |
835 | |
836 // Note: Do not verify in here as the CodeCache_lock is | |
837 // taken which would conflict with the CompiledIC_lock | |
838 // which taken during the verification of call sites. | |
839 // (was bug - gri 10/25/99) | |
840 | |
841 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
842 } | |
843 | |
844 | |
845 // Print a short set of xml attributes to identify this nmethod. The | |
846 // output should be embedded in some other element. | |
847 void nmethod::log_identity(xmlStream* log) const { | |
848 log->print(" compile_id='%d'", compile_id()); | |
849 const char* nm_kind = compile_kind(); | |
850 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
851 if (compiler() != NULL) { | |
852 log->print(" compiler='%s'", compiler()->name()); | |
853 } | |
854 #ifdef TIERED | |
855 log->print(" level='%d'", comp_level()); | |
856 #endif // TIERED | |
857 } | |
858 | |
859 | |
860 #define LOG_OFFSET(log, name) \ | |
861 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
862 log->print(" " XSTR(name) "_offset='%d'" , \ | |
863 (intptr_t)name##_begin() - (intptr_t)this) | |
864 | |
865 | |
866 void nmethod::log_new_nmethod() const { | |
867 if (LogCompilation && xtty != NULL) { | |
868 ttyLocker ttyl; | |
869 HandleMark hm; | |
870 xtty->begin_elem("nmethod"); | |
871 log_identity(xtty); | |
872 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", | |
873 instructions_begin(), size()); | |
874 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
875 | |
876 LOG_OFFSET(xtty, relocation); | |
877 LOG_OFFSET(xtty, code); | |
878 LOG_OFFSET(xtty, stub); | |
879 LOG_OFFSET(xtty, consts); | |
880 LOG_OFFSET(xtty, scopes_data); | |
881 LOG_OFFSET(xtty, scopes_pcs); | |
882 LOG_OFFSET(xtty, dependencies); | |
883 LOG_OFFSET(xtty, handler_table); | |
884 LOG_OFFSET(xtty, nul_chk_table); | |
885 LOG_OFFSET(xtty, oops); | |
886 | |
887 xtty->method(method()); | |
888 xtty->stamp(); | |
889 xtty->end_elem(); | |
890 } | |
891 } | |
892 | |
893 #undef LOG_OFFSET | |
894 | |
895 | |
896 // Print out more verbose output usually for a newly created nmethod. | |
897 void nmethod::print_on(outputStream* st, const char* title) const { | |
898 if (st != NULL) { | |
899 ttyLocker ttyl; | |
900 // Print a little tag line that looks like +PrintCompilation output: | |
989
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901 int tlen = (int) strlen(title); |
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902 bool do_nl = false; |
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903 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } |
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904 st->print("%3d%c %.*s", |
0 | 905 compile_id(), |
906 is_osr_method() ? '%' : | |
907 method() != NULL && | |
908 is_native_method() ? 'n' : ' ', | |
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909 tlen, title); |
0 | 910 #ifdef TIERED |
911 st->print(" (%d) ", comp_level()); | |
912 #endif // TIERED | |
913 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); | |
989
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914 if (Universe::heap()->is_gc_active() && method() != NULL) { |
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915 st->print("(method)"); |
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916 } else if (method() != NULL) { |
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917 method()->print_short_name(st); |
0 | 918 if (is_osr_method()) |
919 st->print(" @ %d", osr_entry_bci()); | |
920 if (method()->code_size() > 0) | |
921 st->print(" (%d bytes)", method()->code_size()); | |
922 } | |
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923 |
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924 if (do_nl) st->cr(); |
0 | 925 } |
926 } | |
927 | |
928 | |
929 void nmethod::print_nmethod(bool printmethod) { | |
930 ttyLocker ttyl; // keep the following output all in one block | |
931 if (xtty != NULL) { | |
932 xtty->begin_head("print_nmethod"); | |
933 xtty->stamp(); | |
934 xtty->end_head(); | |
935 } | |
936 // print the header part first | |
937 print(); | |
938 // then print the requested information | |
939 if (printmethod) { | |
940 print_code(); | |
941 print_pcs(); | |
942 oop_maps()->print(); | |
943 } | |
944 if (PrintDebugInfo) { | |
945 print_scopes(); | |
946 } | |
947 if (PrintRelocations) { | |
948 print_relocations(); | |
949 } | |
950 if (PrintDependencies) { | |
951 print_dependencies(); | |
952 } | |
953 if (PrintExceptionHandlers) { | |
954 print_handler_table(); | |
955 print_nul_chk_table(); | |
956 } | |
957 if (xtty != NULL) { | |
958 xtty->tail("print_nmethod"); | |
959 } | |
960 } | |
961 | |
962 | |
1563
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963 // Promote one word from an assembly-time handle to a live embedded oop. |
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964 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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965 if (handle == NULL || |
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966 // As a special case, IC oops are initialized to 1 or -1. |
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967 handle == (jobject) Universe::non_oop_word()) { |
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968 (*dest) = (oop) handle; |
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969 } else { |
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970 (*dest) = JNIHandles::resolve_non_null(handle); |
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971 } |
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972 } |
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973 |
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974 |
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975 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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976 //assert(oops_size() == 0, "do this handshake just once, please"); |
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977 int length = array->length(); |
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978 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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979 oop* dest = oops_begin(); |
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980 for (int index = 0 ; index < length; index++) { |
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981 initialize_immediate_oop(&dest[index], array->at(index)); |
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982 } |
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983 |
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984 // Now we can fix up all the oops in the code. We need to do this |
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985 // in the code because the assembler uses jobjects as placeholders. |
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986 // The code and relocations have already been initialized by the |
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987 // CodeBlob constructor, so it is valid even at this early point to |
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988 // iterate over relocations and patch the code. |
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989 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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990 } |
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991 |
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992 |
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993 bool nmethod::is_at_poll_return(address pc) { |
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994 RelocIterator iter(this, pc, pc+1); |
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995 while (iter.next()) { |
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996 if (iter.type() == relocInfo::poll_return_type) |
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997 return true; |
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998 } |
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999 return false; |
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1000 } |
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1001 |
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1002 |
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1003 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1004 RelocIterator iter(this, pc, pc+1); |
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1005 while (iter.next()) { |
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1006 relocInfo::relocType t = iter.type(); |
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1007 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1008 return true; |
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1009 } |
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1010 return false; |
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1011 } |
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1012 |
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1013 |
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1014 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1015 // re-patch all oop-bearing instructions, just in case some oops moved |
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1016 RelocIterator iter(this, begin, end); |
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1017 while (iter.next()) { |
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1018 if (iter.type() == relocInfo::oop_type) { |
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1019 oop_Relocation* reloc = iter.oop_reloc(); |
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1020 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1021 oop* dest = reloc->oop_addr(); |
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1022 initialize_immediate_oop(dest, (jobject) *dest); |
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1023 } |
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1024 // Refresh the oop-related bits of this instruction. |
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1025 reloc->fix_oop_relocation(); |
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1026 } |
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1027 |
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1028 // There must not be any interfering patches or breakpoints. |
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1029 assert(!(iter.type() == relocInfo::breakpoint_type |
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1030 && iter.breakpoint_reloc()->active()), |
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1031 "no active breakpoint"); |
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1032 } |
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1033 } |
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1034 |
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1035 |
0 | 1036 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1037 PcDesc* pd = pc_desc_at(pc); | |
1038 guarantee(pd != NULL, "scope must be present"); | |
1039 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1040 pd->obj_decode_offset(), pd->should_reexecute(), |
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1041 pd->return_oop()); |
0 | 1042 } |
1043 | |
1044 | |
1045 void nmethod::clear_inline_caches() { | |
1046 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1047 if (is_zombie()) { | |
1048 return; | |
1049 } | |
1050 | |
1051 RelocIterator iter(this); | |
1052 while (iter.next()) { | |
1053 iter.reloc()->clear_inline_cache(); | |
1054 } | |
1055 } | |
1056 | |
1057 | |
1058 void nmethod::cleanup_inline_caches() { | |
1059 | |
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1060 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1061 |
1062 // If the method is not entrant or zombie then a JMP is plastered over the | |
1063 // first few bytes. If an oop in the old code was there, that oop | |
1064 // should not get GC'd. Skip the first few bytes of oops on | |
1065 // not-entrant methods. | |
1066 address low_boundary = verified_entry_point(); | |
1067 if (!is_in_use()) { | |
1068 low_boundary += NativeJump::instruction_size; | |
1069 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1070 // This means that the low_boundary is going to be a little too high. | |
1071 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1072 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1073 } | |
1074 | |
1075 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1076 ResourceMark rm; | |
1077 RelocIterator iter(this, low_boundary); | |
1078 while(iter.next()) { | |
1079 switch(iter.type()) { | |
1080 case relocInfo::virtual_call_type: | |
1081 case relocInfo::opt_virtual_call_type: { | |
1082 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1083 // Ok, to lookup references to zombies here | |
1084 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1085 if( cb != NULL && cb->is_nmethod() ) { | |
1086 nmethod* nm = (nmethod*)cb; | |
1087 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1088 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1089 } |
1090 break; | |
1091 } | |
1092 case relocInfo::static_call_type: { | |
1093 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1094 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1095 if( cb != NULL && cb->is_nmethod() ) { | |
1096 nmethod* nm = (nmethod*)cb; | |
1097 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1098 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1099 } |
1100 break; | |
1101 } | |
1102 } | |
1103 } | |
1104 } | |
1105 | |
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1106 // This is a private interface with the sweeper. |
0 | 1107 void nmethod::mark_as_seen_on_stack() { |
1108 assert(is_not_entrant(), "must be a non-entrant method"); | |
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1109 // Set the traversal mark to ensure that the sweeper does 2 |
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1110 // cleaning passes before moving to zombie. |
0 | 1111 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1112 } | |
1113 | |
1114 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
1115 bool nmethod::can_not_entrant_be_converted() { | |
1116 assert(is_not_entrant(), "must be a non-entrant method"); | |
1117 | |
1118 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1119 // count can be greater than the stack traversal count before it hits the | |
1120 // nmethod for the second time. | |
1121 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
1122 } | |
1123 | |
1124 void nmethod::inc_decompile_count() { | |
1125 // Could be gated by ProfileTraps, but do not bother... | |
1126 methodOop m = method(); | |
1127 if (m == NULL) return; | |
1128 methodDataOop mdo = m->method_data(); | |
1129 if (mdo == NULL) return; | |
1130 // There is a benign race here. See comments in methodDataOop.hpp. | |
1131 mdo->inc_decompile_count(); | |
1132 } | |
1133 | |
1134 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1135 | |
1136 post_compiled_method_unload(); | |
1137 | |
1138 // Since this nmethod is being unloaded, make sure that dependencies | |
1139 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1140 // indicate that this work is being done during a GC. | |
1141 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1142 assert(is_alive != NULL, "Should be non-NULL"); | |
1143 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1144 flush_dependencies(is_alive); | |
1145 | |
1146 // Break cycle between nmethod & method | |
1147 if (TraceClassUnloading && WizardMode) { | |
1148 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1149 " unloadable], methodOop(" INTPTR_FORMAT | |
1150 "), cause(" INTPTR_FORMAT ")", | |
1151 this, (address)_method, (address)cause); | |
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1152 if (!Universe::heap()->is_gc_active()) |
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1153 cause->klass()->print(); |
0 | 1154 } |
941 | 1155 // Unlink the osr method, so we do not look this up again |
1156 if (is_osr_method()) { | |
1157 invalidate_osr_method(); | |
1158 } | |
0 | 1159 // If _method is already NULL the methodOop is about to be unloaded, |
1160 // so we don't have to break the cycle. Note that it is possible to | |
1161 // have the methodOop live here, in case we unload the nmethod because | |
1162 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1163 if (_method != NULL) { | |
1164 // OSR methods point to the methodOop, but the methodOop does not | |
1165 // point back! | |
1166 if (_method->code() == this) { | |
1167 _method->clear_code(); // Break a cycle | |
1168 } | |
1169 _method = NULL; // Clear the method of this dead nmethod | |
1170 } | |
1171 // Make the class unloaded - i.e., change state and notify sweeper | |
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1172 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1173 if (is_in_use()) { |
1174 // Transitioning directly from live to unloaded -- so | |
1175 // we need to force a cache clean-up; remember this | |
1176 // for later on. | |
1177 CodeCache::set_needs_cache_clean(true); | |
1178 } | |
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1179 _state = unloaded; |
0 | 1180 |
1109
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1181 // Log the unloading. |
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1182 log_state_change(); |
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1183 |
0 | 1184 // The methodOop is gone at this point |
1185 assert(_method == NULL, "Tautology"); | |
1186 | |
989
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1187 set_osr_link(NULL); |
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1188 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1189 NMethodSweeper::notify(this); |
1190 } | |
1191 | |
1192 void nmethod::invalidate_osr_method() { | |
1193 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1194 // Remove from list of active nmethods | |
1195 if (method() != NULL) | |
1196 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1197 // Set entry as invalid | |
1198 _entry_bci = InvalidOSREntryBci; | |
1199 } | |
1200 | |
1109
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1201 void nmethod::log_state_change() const { |
0 | 1202 if (LogCompilation) { |
1203 if (xtty != NULL) { | |
1204 ttyLocker ttyl; // keep the following output all in one block | |
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1205 if (_state == unloaded) { |
1109
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1206 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1207 os::current_thread_id()); |
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1208 } else { |
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1209 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1210 os::current_thread_id(), |
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1211 (_state == zombie ? " zombie='1'" : "")); |
1109
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1212 } |
0 | 1213 log_identity(xtty); |
1214 xtty->stamp(); | |
1215 xtty->end_elem(); | |
1216 } | |
1217 } | |
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1218 if (PrintCompilation && _state != unloaded) { |
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1219 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
0 | 1220 tty->cr(); |
1221 } | |
1222 } | |
1223 | |
1224 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1225 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1226 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
1227 | |
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1228 bool was_alive = false; |
0 | 1229 |
1644
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1230 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1231 nmethodLocker nml(this); |
1644
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1232 methodHandle the_method(method()); |
0 | 1233 |
1234 { | |
1206
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1235 // If the method is already zombie there is nothing to do |
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1236 if (is_zombie()) { |
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1237 return false; |
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1238 } |
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1239 |
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1240 // invalidate osr nmethod before acquiring the patching lock since |
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1241 // they both acquire leaf locks and we don't want a deadlock. |
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1242 // This logic is equivalent to the logic below for patching the |
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1243 // verified entry point of regular methods. |
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1244 if (is_osr_method()) { |
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1245 // this effectively makes the osr nmethod not entrant |
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1246 invalidate_osr_method(); |
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1247 } |
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1248 |
0 | 1249 // Enter critical section. Does not block for safepoint. |
1250 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1251 |
1644
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1252 if (_state == state) { |
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1253 // another thread already performed this transition so nothing |
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1254 // to do, but return false to indicate this. |
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1255 return false; |
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1256 } |
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1257 |
0 | 1258 // The caller can be calling the method statically or through an inline |
1259 // cache call. | |
1109
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1260 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1261 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1262 SharedRuntime::get_handle_wrong_method_stub()); | |
1263 } | |
1264 | |
1644
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1265 if (is_in_use()) { |
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1266 // It's a true state change, so mark the method as decompiled. |
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1267 // Do it only for transition from alive. |
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1268 inc_decompile_count(); |
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1269 } |
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1270 |
0 | 1271 // Change state |
1644
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1272 _state = state; |
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1273 |
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1274 // Log the transition once |
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1275 log_state_change(); |
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1276 |
1644
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1277 // Remove nmethod from method. |
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1278 // We need to check if both the _code and _from_compiled_code_entry_point |
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1279 // refer to this nmethod because there is a race in setting these two fields |
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1280 // in methodOop as seen in bugid 4947125. |
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1281 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1282 // could be flushed and the compiler and vtable stubs could still call |
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1283 // through it. |
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1284 if (method() != NULL && (method()->code() == this || |
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1285 method()->from_compiled_entry() == verified_entry_point())) { |
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1286 HandleMark hm; |
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1287 method()->clear_code(); |
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1288 } |
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1289 |
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1290 if (state == not_entrant) { |
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1291 mark_as_seen_on_stack(); |
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1292 } |
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1293 |
0 | 1294 } // leave critical region under Patching_lock |
1295 | |
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1296 // When the nmethod becomes zombie it is no longer alive so the |
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1297 // dependencies must be flushed. nmethods in the not_entrant |
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1298 // state will be flushed later when the transition to zombie |
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1299 // happens or they get unloaded. |
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1300 if (state == zombie) { |
1644
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1301 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event |
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1302 // and it hasn't already been reported for this nmethod then report it now. |
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1303 // (the event may have been reported earilier if the GC marked it for unloading). |
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1304 post_compiled_method_unload(); |
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1305 |
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1306 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1307 flush_dependencies(NULL); |
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1308 } else { |
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1309 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1310 } |
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1311 |
0 | 1312 if (TraceCreateZombies) { |
1313 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1314 } | |
1315 | |
1316 // Make sweeper aware that there is a zombie method that needs to be removed | |
1317 NMethodSweeper::notify(this); | |
1318 | |
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1319 return true; |
0 | 1320 } |
1321 | |
1322 void nmethod::flush() { | |
1323 // Note that there are no valid oops in the nmethod anymore. | |
1324 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1325 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1326 | |
1327 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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1328 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1329 |
1330 // completely deallocate this method | |
1331 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1332 if (PrintMethodFlushing) { | |
1202 | 1333 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1334 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1335 } |
1336 | |
1337 // We need to deallocate any ExceptionCache data. | |
1338 // Note that we do not need to grab the nmethod lock for this, it | |
1339 // better be thread safe if we're disposing of it! | |
1340 ExceptionCache* ec = exception_cache(); | |
1341 set_exception_cache(NULL); | |
1342 while(ec != NULL) { | |
1343 ExceptionCache* next = ec->next(); | |
1344 delete ec; | |
1345 ec = next; | |
1346 } | |
1347 | |
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1348 if (on_scavenge_root_list()) { |
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1349 CodeCache::drop_scavenge_root_nmethod(this); |
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1350 } |
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1351 |
1202 | 1352 if (is_speculatively_disconnected()) { |
1353 CodeCache::remove_saved_code(this); | |
1354 } | |
1355 | |
0 | 1356 ((CodeBlob*)(this))->flush(); |
1357 | |
1358 CodeCache::free(this); | |
1359 } | |
1360 | |
1361 | |
1362 // | |
1363 // Notify all classes this nmethod is dependent on that it is no | |
1364 // longer dependent. This should only be called in two situations. | |
1365 // First, when a nmethod transitions to a zombie all dependents need | |
1366 // to be clear. Since zombification happens at a safepoint there's no | |
1367 // synchronization issues. The second place is a little more tricky. | |
1368 // During phase 1 of mark sweep class unloading may happen and as a | |
1369 // result some nmethods may get unloaded. In this case the flushing | |
1370 // of dependencies must happen during phase 1 since after GC any | |
1371 // dependencies in the unloaded nmethod won't be updated, so | |
1372 // traversing the dependency information in unsafe. In that case this | |
1373 // function is called with a non-NULL argument and this function only | |
1374 // notifies instanceKlasses that are reachable | |
1375 | |
1376 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1377 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1378 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1379 "is_alive is non-NULL if and only if we are called during GC"); | |
1380 if (!has_flushed_dependencies()) { | |
1381 set_has_flushed_dependencies(); | |
1382 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1383 klassOop klass = deps.context_type(); | |
1384 if (klass == NULL) continue; // ignore things like evol_method | |
1385 | |
1386 // During GC the is_alive closure is non-NULL, and is used to | |
1387 // determine liveness of dependees that need to be updated. | |
1388 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1389 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1390 } | |
1391 } | |
1392 } | |
1393 } | |
1394 | |
1395 | |
1396 // If this oop is not live, the nmethod can be unloaded. | |
1397 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1398 OopClosure* keep_alive, | |
1399 oop* root, bool unloading_occurred) { | |
1400 assert(root != NULL, "just checking"); | |
1401 oop obj = *root; | |
1402 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1403 return false; | |
1404 } | |
1405 if (obj->is_compiledICHolder()) { | |
1406 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1407 if (is_alive->do_object_b( | |
1408 cichk_oop->holder_method()->method_holder()) && | |
1409 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1410 // The oop should be kept alive | |
1411 keep_alive->do_oop(root); | |
1412 return false; | |
1413 } | |
1414 } | |
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1415 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1416 // simply because one of its constant oops has gone dead. |
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1417 // No actual classes need to be unloaded in order for this to occur. |
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1418 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1419 make_unloaded(is_alive, obj); |
1420 return true; | |
1421 } | |
1422 | |
1423 // ------------------------------------------------------------------ | |
1424 // post_compiled_method_load_event | |
1425 // new method for install_code() path | |
1426 // Transfer information from compilation to jvmti | |
1427 void nmethod::post_compiled_method_load_event() { | |
1428 | |
1429 methodOop moop = method(); | |
1430 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1431 moop->klass_name()->bytes(), | |
1432 moop->klass_name()->utf8_length(), | |
1433 moop->name()->bytes(), | |
1434 moop->name()->utf8_length(), | |
1435 moop->signature()->bytes(), | |
1436 moop->signature()->utf8_length(), | |
1437 code_begin(), code_size()); | |
1438 | |
1616
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1439 if (JvmtiExport::should_post_compiled_method_load() || |
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1440 JvmtiExport::should_post_compiled_method_unload()) { |
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1441 get_and_cache_jmethod_id(); |
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1442 } |
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1443 |
0 | 1444 if (JvmtiExport::should_post_compiled_method_load()) { |
1445 JvmtiExport::post_compiled_method_load(this); | |
1446 } | |
1447 } | |
1448 | |
1616
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1449 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1450 if (_jmethod_id == NULL) { |
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1451 // Cache the jmethod_id since it can no longer be looked up once the |
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1452 // method itself has been marked for unloading. |
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1453 _jmethod_id = method()->jmethod_id(); |
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1454 } |
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1455 return _jmethod_id; |
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1456 } |
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1457 |
0 | 1458 void nmethod::post_compiled_method_unload() { |
1577
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|
1459 if (unload_reported()) { |
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6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
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diff
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|
1460 // During unloading we transition to unloaded and then to zombie |
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diff
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|
1461 // and the unloading is reported during the first transition. |
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|
1462 return; |
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6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
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diff
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|
1463 } |
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|
1464 |
0 | 1465 assert(_method != NULL && !is_unloaded(), "just checking"); |
1466 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1467 | |
1468 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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diff
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|
1469 // post the event. Sometime later this nmethod will be made a zombie |
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|
1470 // by the sweeper but the methodOop will not be valid at that point. |
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|
1471 // If the _jmethod_id is null then no load event was ever requested |
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1472 // so don't bother posting the unload. The main reason for this is |
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1473 // that the jmethodID is a weak reference to the methodOop so if |
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1474 // it's being unloaded there's no way to look it up since the weak |
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1475 // ref will have been cleared. |
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1476 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1477 assert(!unload_reported(), "already unloaded"); |
1478 HandleMark hm; | |
1616
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1479 JvmtiExport::post_compiled_method_unload(_jmethod_id, code_begin()); |
0 | 1480 } |
1481 | |
1482 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1483 // any time. As the nmethod is being unloaded now we mark it has | |
1484 // having the unload event reported - this will ensure that we don't | |
1485 // attempt to report the event in the unlikely scenario where the | |
1486 // event is enabled at the time the nmethod is made a zombie. | |
1487 set_unload_reported(); | |
1488 } | |
1489 | |
1490 // This is called at the end of the strong tracing/marking phase of a | |
1491 // GC to unload an nmethod if it contains otherwise unreachable | |
1492 // oops. | |
1493 | |
1494 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1495 OopClosure* keep_alive, bool unloading_occurred) { | |
1496 // Make sure the oop's ready to receive visitors | |
1497 assert(!is_zombie() && !is_unloaded(), | |
1498 "should not call follow on zombie or unloaded nmethod"); | |
1499 | |
1500 // If the method is not entrant then a JMP is plastered over the | |
1501 // first few bytes. If an oop in the old code was there, that oop | |
1502 // should not get GC'd. Skip the first few bytes of oops on | |
1503 // not-entrant methods. | |
1504 address low_boundary = verified_entry_point(); | |
1505 if (is_not_entrant()) { | |
1506 low_boundary += NativeJump::instruction_size; | |
1507 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1508 // (See comment above.) | |
1509 } | |
1510 | |
1511 // The RedefineClasses() API can cause the class unloading invariant | |
1512 // to no longer be true. See jvmtiExport.hpp for details. | |
1513 // Also, leave a debugging breadcrumb in local flag. | |
1514 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1515 if (a_class_was_redefined) { | |
1516 // This set of the unloading_occurred flag is done before the | |
1517 // call to post_compiled_method_unload() so that the unloading | |
1518 // of this nmethod is reported. | |
1519 unloading_occurred = true; | |
1520 } | |
1521 | |
1522 // Follow methodOop | |
1523 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1524 return; | |
1525 } | |
1526 | |
1527 // Exception cache | |
1528 ExceptionCache* ec = exception_cache(); | |
1529 while (ec != NULL) { | |
1530 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1531 oop ex = *ex_addr; | |
1532 ExceptionCache* next_ec = ec->next(); | |
1533 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1534 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1535 remove_from_exception_cache(ec); | |
1536 } | |
1537 ec = next_ec; | |
1538 } | |
1539 | |
1540 // If class unloading occurred we first iterate over all inline caches and | |
1541 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1542 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1543 // iteration below. | |
1544 if (unloading_occurred) { | |
1545 RelocIterator iter(this, low_boundary); | |
1546 while(iter.next()) { | |
1547 if (iter.type() == relocInfo::virtual_call_type) { | |
1548 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1549 oop ic_oop = ic->cached_oop(); | |
1550 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1551 // The only exception is compiledICHolder oops which may | |
1552 // yet be marked below. (We check this further below). | |
1553 if (ic_oop->is_compiledICHolder()) { | |
1554 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1555 if (is_alive->do_object_b( | |
1556 cichk_oop->holder_method()->method_holder()) && | |
1557 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1558 continue; | |
1559 } | |
1560 } | |
1561 ic->set_to_clean(); | |
1489
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1562 assert(ic->cached_oop() == NULL, |
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1563 "cached oop in IC should be cleared"); |
0 | 1564 } |
1565 } | |
1566 } | |
1567 } | |
1568 | |
1569 // Compiled code | |
1570 RelocIterator iter(this, low_boundary); | |
1571 while (iter.next()) { | |
1572 if (iter.type() == relocInfo::oop_type) { | |
1573 oop_Relocation* r = iter.oop_reloc(); | |
1574 // In this loop, we must only traverse those oops directly embedded in | |
1575 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1576 assert(1 == (r->oop_is_immediate()) + | |
1577 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1578 "oop must be found in exactly one place"); | |
1579 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1580 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1581 return; | |
1582 } | |
1583 } | |
1584 } | |
1585 } | |
1586 | |
1587 | |
1588 // Scopes | |
1589 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1590 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1591 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1592 return; | |
1593 } | |
1594 } | |
1595 | |
1596 #ifndef PRODUCT | |
1597 // This nmethod was not unloaded; check below that all CompiledICs | |
1598 // refer to marked oops. | |
1599 { | |
1600 RelocIterator iter(this, low_boundary); | |
1601 while (iter.next()) { | |
1602 if (iter.type() == relocInfo::virtual_call_type) { | |
1603 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1604 oop ic_oop = ic->cached_oop(); | |
1605 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1606 "Found unmarked ic_oop in reachable nmethod"); | |
1607 } | |
1608 } | |
1609 } | |
1610 #endif // !PRODUCT | |
1611 } | |
1612 | |
941 | 1613 // This method is called twice during GC -- once while |
1614 // tracing the "active" nmethods on thread stacks during | |
1615 // the (strong) marking phase, and then again when walking | |
1616 // the code cache contents during the weak roots processing | |
1617 // phase. The two uses are distinguished by means of the | |
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1618 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1619 // case. We want to walk the weak roots in the nmethod |
1620 // only in the second case. The weak roots in the nmethod | |
1621 // are the oops in the ExceptionCache and the InlineCache | |
1622 // oops. | |
994
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1623 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1624 // make sure the oops ready to receive visitors |
1625 assert(!is_zombie() && !is_unloaded(), | |
1626 "should not call follow on zombie or unloaded nmethod"); | |
1627 | |
1628 // If the method is not entrant or zombie then a JMP is plastered over the | |
1629 // first few bytes. If an oop in the old code was there, that oop | |
1630 // should not get GC'd. Skip the first few bytes of oops on | |
1631 // not-entrant methods. | |
1632 address low_boundary = verified_entry_point(); | |
1633 if (is_not_entrant()) { | |
1634 low_boundary += NativeJump::instruction_size; | |
1635 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1636 // (See comment above.) | |
1637 } | |
1638 | |
1639 // Compiled code | |
1640 f->do_oop((oop*) &_method); | |
994
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1641 if (!do_strong_roots_only) { |
941 | 1642 // weak roots processing phase -- update ExceptionCache oops |
1643 ExceptionCache* ec = exception_cache(); | |
1644 while(ec != NULL) { | |
1645 f->do_oop((oop*)ec->exception_type_addr()); | |
1646 ec = ec->next(); | |
1647 } | |
1648 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1649 |
1650 RelocIterator iter(this, low_boundary); | |
941 | 1651 |
0 | 1652 while (iter.next()) { |
1653 if (iter.type() == relocInfo::oop_type ) { | |
1654 oop_Relocation* r = iter.oop_reloc(); | |
1655 // In this loop, we must only follow those oops directly embedded in | |
1656 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1657 assert(1 == (r->oop_is_immediate()) + |
1658 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1659 "oop must be found in exactly one place"); | |
0 | 1660 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1661 f->do_oop(r->oop_addr()); | |
1662 } | |
1663 } | |
1664 } | |
1665 | |
1666 // Scopes | |
989
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|
1667 // This includes oop constants not inlined in the code stream. |
0 | 1668 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1669 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1670 f->do_oop(p); | |
1671 } | |
1672 } | |
1673 | |
989
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|
1674 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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|
1675 |
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|
1676 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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|
1677 |
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|
1678 // An nmethod is "marked" if its _mark_link is set non-null. |
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|
1679 // Even if it is the end of the linked list, it will have a non-null link value, |
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1680 // as long as it is on the list. |
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|
1681 // This code must be MP safe, because it is used from parallel GC passes. |
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|
1682 bool nmethod::test_set_oops_do_mark() { |
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1683 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1684 nmethod* observed_mark_link = _oops_do_mark_link; |
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1685 if (observed_mark_link == NULL) { |
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|
1686 // Claim this nmethod for this thread to mark. |
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|
1687 observed_mark_link = (nmethod*) |
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|
1688 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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|
1689 if (observed_mark_link == NULL) { |
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|
1690 |
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|
1691 // Atomically append this nmethod (now claimed) to the head of the list: |
148e5441d916
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|
1692 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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|
1693 for (;;) { |
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|
1694 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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|
1695 _oops_do_mark_link = required_mark_nmethods; |
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|
1696 observed_mark_nmethods = (nmethod*) |
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|
1697 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1698 if (observed_mark_nmethods == required_mark_nmethods) |
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|
1699 break; |
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|
1700 } |
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|
1701 // Mark was clear when we first saw this guy. |
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1702 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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|
1703 return false; |
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|
1704 } |
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|
1705 } |
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|
1706 // On fall through, another racing thread marked this nmethod before we did. |
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|
1707 return true; |
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|
1708 } |
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|
1709 |
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|
1710 void nmethod::oops_do_marking_prologue() { |
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1711 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1712 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1713 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1714 // may fork a bunch of threads, and we need them all to see the same state. |
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|
1715 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1716 guarantee(observed == NULL, "no races in this sequential code"); |
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|
1717 } |
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|
1718 |
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|
1719 void nmethod::oops_do_marking_epilogue() { |
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|
1720 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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|
1721 nmethod* cur = _oops_do_mark_nmethods; |
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1722 while (cur != NMETHOD_SENTINEL) { |
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|
1723 assert(cur != NULL, "not NULL-terminated"); |
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1724 nmethod* next = cur->_oops_do_mark_link; |
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1725 cur->_oops_do_mark_link = NULL; |
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1726 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1727 cur = next; |
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1728 } |
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1729 void* required = _oops_do_mark_nmethods; |
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1730 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1731 guarantee(observed == required, "no races in this sequential code"); |
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1732 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1733 } |
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1734 |
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1735 class DetectScavengeRoot: public OopClosure { |
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1736 bool _detected_scavenge_root; |
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1737 public: |
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1738 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1739 { NOT_PRODUCT(_print_nm = NULL); } |
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1740 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1741 virtual void do_oop(oop* p) { |
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1742 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1743 NOT_PRODUCT(maybe_print(p)); |
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1744 _detected_scavenge_root = true; |
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1745 } |
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1746 } |
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1747 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1748 |
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1749 #ifndef PRODUCT |
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1750 nmethod* _print_nm; |
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1751 void maybe_print(oop* p) { |
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1752 if (_print_nm == NULL) return; |
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1753 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1754 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1755 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1756 (intptr_t)(*p), (intptr_t)p); |
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1757 (*p)->print(); |
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1758 } |
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1759 #endif //PRODUCT |
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1760 }; |
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1761 |
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1762 bool nmethod::detect_scavenge_root_oops() { |
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1763 DetectScavengeRoot detect_scavenge_root; |
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1764 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1765 oops_do(&detect_scavenge_root); |
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1766 return detect_scavenge_root.detected_scavenge_root(); |
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1767 } |
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1768 |
0 | 1769 // Method that knows how to preserve outgoing arguments at call. This method must be |
1770 // called with a frame corresponding to a Java invoke | |
1771 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1772 if (!method()->is_native()) { | |
1773 SimpleScopeDesc ssd(this, fr.pc()); | |
1774 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); | |
1138
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1775 bool has_receiver = call->has_receiver(); |
0 | 1776 symbolOop signature = call->signature(); |
1138
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1777 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1778 } |
1779 } | |
1780 | |
1781 | |
1782 oop nmethod::embeddedOop_at(u_char* p) { | |
1783 RelocIterator iter(this, p, p + oopSize); | |
1784 while (iter.next()) | |
1785 if (iter.type() == relocInfo::oop_type) { | |
1786 return iter.oop_reloc()->oop_value(); | |
1787 } | |
1788 return NULL; | |
1789 } | |
1790 | |
1791 | |
1792 inline bool includes(void* p, void* from, void* to) { | |
1793 return from <= p && p < to; | |
1794 } | |
1795 | |
1796 | |
1797 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1798 assert(count >= 2, "must be sentinel values, at least"); | |
1799 | |
1800 #ifdef ASSERT | |
1801 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1802 int prev_offset = pcs[0].pc_offset(); | |
1803 assert(prev_offset == PcDesc::lower_offset_limit, | |
1804 "must start with a sentinel"); | |
1805 for (int i = 1; i < count; i++) { | |
1806 int this_offset = pcs[i].pc_offset(); | |
1807 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1808 prev_offset = this_offset; | |
1809 } | |
1810 assert(prev_offset == PcDesc::upper_offset_limit, | |
1811 "must end with a sentinel"); | |
1812 #endif //ASSERT | |
1813 | |
1135
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1814 // Search for MethodHandle invokes and tag the nmethod. |
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1815 for (int i = 0; i < count; i++) { |
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1816 if (pcs[i].is_method_handle_invoke()) { |
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1817 set_has_method_handle_invokes(true); |
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1818 break; |
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1819 } |
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1820 } |
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1821 |
0 | 1822 int size = count * sizeof(PcDesc); |
1823 assert(scopes_pcs_size() >= size, "oob"); | |
1824 memcpy(scopes_pcs_begin(), pcs, size); | |
1825 | |
1826 // Adjust the final sentinel downward. | |
1827 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1828 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1829 last_pc->set_pc_offset(instructions_size() + 1); | |
1830 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { | |
1831 // Fill any rounding gaps with copies of the last record. | |
1832 last_pc[1] = last_pc[0]; | |
1833 } | |
1834 // The following assert could fail if sizeof(PcDesc) is not | |
1835 // an integral multiple of oopSize (the rounding term). | |
1836 // If it fails, change the logic to always allocate a multiple | |
1837 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1838 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1839 } | |
1840 | |
1841 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1842 assert(scopes_data_size() >= size, "oob"); | |
1843 memcpy(scopes_data_begin(), buffer, size); | |
1844 } | |
1845 | |
1846 | |
1847 #ifdef ASSERT | |
1848 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1849 PcDesc* lower = nm->scopes_pcs_begin(); | |
1850 PcDesc* upper = nm->scopes_pcs_end(); | |
1851 lower += 1; // exclude initial sentinel | |
1852 PcDesc* res = NULL; | |
1853 for (PcDesc* p = lower; p < upper; p++) { | |
1854 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1855 if (match_desc(p, pc_offset, approximate)) { | |
1856 if (res == NULL) | |
1857 res = p; | |
1858 else | |
1859 res = (PcDesc*) badAddress; | |
1860 } | |
1861 } | |
1862 return res; | |
1863 } | |
1864 #endif | |
1865 | |
1866 | |
1867 // Finds a PcDesc with real-pc equal to "pc" | |
1868 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1869 address base_address = instructions_begin(); | |
1870 if ((pc < base_address) || | |
1871 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1872 return NULL; // PC is wildly out of range | |
1873 } | |
1874 int pc_offset = (int) (pc - base_address); | |
1875 | |
1876 // Check the PcDesc cache if it contains the desired PcDesc | |
1877 // (This as an almost 100% hit rate.) | |
1878 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1879 if (res != NULL) { | |
1880 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1881 return res; | |
1882 } | |
1883 | |
1884 // Fallback algorithm: quasi-linear search for the PcDesc | |
1885 // Find the last pc_offset less than the given offset. | |
1886 // The successor must be the required match, if there is a match at all. | |
1887 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1888 PcDesc* lower = scopes_pcs_begin(); | |
1889 PcDesc* upper = scopes_pcs_end(); | |
1890 upper -= 1; // exclude final sentinel | |
1891 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1892 | |
1893 #define assert_LU_OK \ | |
1894 /* invariant on lower..upper during the following search: */ \ | |
1895 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1896 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1897 assert_LU_OK; | |
1898 | |
1899 // Use the last successful return as a split point. | |
1900 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
1901 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1902 if (mid->pc_offset() < pc_offset) { | |
1903 lower = mid; | |
1904 } else { | |
1905 upper = mid; | |
1906 } | |
1907 | |
1908 // Take giant steps at first (4096, then 256, then 16, then 1) | |
1909 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
1910 const int RADIX = (1 << LOG2_RADIX); | |
1911 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
1912 while ((mid = lower + step) < upper) { | |
1913 assert_LU_OK; | |
1914 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1915 if (mid->pc_offset() < pc_offset) { | |
1916 lower = mid; | |
1917 } else { | |
1918 upper = mid; | |
1919 break; | |
1920 } | |
1921 } | |
1922 assert_LU_OK; | |
1923 } | |
1924 | |
1925 // Sneak up on the value with a linear search of length ~16. | |
1926 while (true) { | |
1927 assert_LU_OK; | |
1928 mid = lower + 1; | |
1929 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1930 if (mid->pc_offset() < pc_offset) { | |
1931 lower = mid; | |
1932 } else { | |
1933 upper = mid; | |
1934 break; | |
1935 } | |
1936 } | |
1937 #undef assert_LU_OK | |
1938 | |
1939 if (match_desc(upper, pc_offset, approximate)) { | |
1940 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
1941 _pc_desc_cache.add_pc_desc(upper); | |
1942 return upper; | |
1943 } else { | |
1944 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
1945 return NULL; | |
1946 } | |
1947 } | |
1948 | |
1949 | |
1950 bool nmethod::check_all_dependencies() { | |
1951 bool found_check = false; | |
1952 // wholesale check of all dependencies | |
1953 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1954 if (deps.check_dependency() != NULL) { | |
1955 found_check = true; | |
1956 NOT_DEBUG(break); | |
1957 } | |
1958 } | |
1959 return found_check; // tell caller if we found anything | |
1960 } | |
1961 | |
1962 bool nmethod::check_dependency_on(DepChange& changes) { | |
1963 // What has happened: | |
1964 // 1) a new class dependee has been added | |
1965 // 2) dependee and all its super classes have been marked | |
1966 bool found_check = false; // set true if we are upset | |
1967 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1968 // Evaluate only relevant dependencies. | |
1969 if (deps.spot_check_dependency_at(changes) != NULL) { | |
1970 found_check = true; | |
1971 NOT_DEBUG(break); | |
1972 } | |
1973 } | |
1974 return found_check; | |
1975 } | |
1976 | |
1977 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
1978 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
1979 objArrayOop dependee_methods = dependee_ik->methods(); | |
1980 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1981 if (deps.type() == Dependencies::evol_method) { | |
1982 methodOop method = deps.method_argument(0); | |
1983 for (int j = 0; j < dependee_methods->length(); j++) { | |
1984 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
1985 // RC_TRACE macro has an embedded ResourceMark | |
1986 RC_TRACE(0x01000000, | |
1987 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
1988 _method->method_holder()->klass_part()->external_name(), | |
1989 _method->name()->as_C_string(), | |
1990 _method->signature()->as_C_string(), compile_id(), | |
1991 method->method_holder()->klass_part()->external_name(), | |
1992 method->name()->as_C_string(), | |
1993 method->signature()->as_C_string())); | |
1994 if (TraceDependencies || LogCompilation) | |
1995 deps.log_dependency(dependee); | |
1996 return true; | |
1997 } | |
1998 } | |
1999 } | |
2000 } | |
2001 return false; | |
2002 } | |
2003 | |
2004 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2005 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2006 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2007 if (deps.type() != Dependencies::evol_method) | |
2008 continue; | |
2009 methodOop method = deps.method_argument(0); | |
2010 if (method == dependee) return true; | |
2011 } | |
2012 return false; | |
2013 } | |
2014 | |
2015 | |
2016 bool nmethod::is_patchable_at(address instr_addr) { | |
2017 assert (code_contains(instr_addr), "wrong nmethod used"); | |
2018 if (is_zombie()) { | |
2019 // a zombie may never be patched | |
2020 return false; | |
2021 } | |
2022 return true; | |
2023 } | |
2024 | |
2025 | |
2026 address nmethod::continuation_for_implicit_exception(address pc) { | |
2027 // Exception happened outside inline-cache check code => we are inside | |
2028 // an active nmethod => use cpc to determine a return address | |
2029 int exception_offset = pc - instructions_begin(); | |
2030 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); | |
2031 #ifdef ASSERT | |
2032 if (cont_offset == 0) { | |
2033 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2034 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2035 HandleMark hm(thread); | |
2036 ResourceMark rm(thread); | |
2037 CodeBlob* cb = CodeCache::find_blob(pc); | |
2038 assert(cb != NULL && cb == this, ""); | |
2039 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2040 print(); | |
2041 method()->print_codes(); | |
2042 print_code(); | |
2043 print_pcs(); | |
2044 } | |
2045 #endif | |
1250 | 2046 if (cont_offset == 0) { |
2047 // Let the normal error handling report the exception | |
2048 return NULL; | |
2049 } | |
0 | 2050 return instructions_begin() + cont_offset; |
2051 } | |
2052 | |
2053 | |
2054 | |
2055 void nmethod_init() { | |
2056 // make sure you didn't forget to adjust the filler fields | |
2057 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2058 } | |
2059 | |
2060 | |
2061 //------------------------------------------------------------------------------------------- | |
2062 | |
2063 | |
2064 // QQQ might we make this work from a frame?? | |
2065 nmethodLocker::nmethodLocker(address pc) { | |
2066 CodeBlob* cb = CodeCache::find_blob(pc); | |
2067 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2068 _nm = (nmethod*)cb; | |
2069 lock_nmethod(_nm); | |
2070 } | |
2071 | |
2072 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
2073 if (nm == NULL) return; | |
2074 Atomic::inc(&nm->_lock_count); | |
2075 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
2076 } | |
2077 | |
2078 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2079 if (nm == NULL) return; | |
2080 Atomic::dec(&nm->_lock_count); | |
2081 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2082 } | |
2083 | |
1204 | 2084 |
2085 // ----------------------------------------------------------------------------- | |
2086 // nmethod::get_deopt_original_pc | |
2087 // | |
2088 // Return the original PC for the given PC if: | |
2089 // (a) the given PC belongs to a nmethod and | |
2090 // (b) it is a deopt PC | |
2091 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2092 if (fr->cb() == NULL) return NULL; | |
2093 | |
2094 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2095 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2096 return nm->get_original_pc(fr); | |
2097 | |
2098 return NULL; | |
0 | 2099 } |
2100 | |
2101 | |
2102 // ----------------------------------------------------------------------------- | |
1135
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2103 // MethodHandle |
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2104 |
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2105 bool nmethod::is_method_handle_return(address return_pc) { |
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2106 if (!has_method_handle_invokes()) return false; |
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2107 PcDesc* pd = pc_desc_at(return_pc); |
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2108 if (pd == NULL) |
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2109 return false; |
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2110 return pd->is_method_handle_invoke(); |
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2111 } |
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2112 |
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2113 |
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2114 // ----------------------------------------------------------------------------- |
0 | 2115 // Verification |
2116 | |
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2117 class VerifyOopsClosure: public OopClosure { |
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2118 nmethod* _nm; |
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2119 bool _ok; |
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2120 public: |
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2121 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2122 bool ok() { return _ok; } |
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2123 virtual void do_oop(oop* p) { |
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2124 if ((*p) == NULL || (*p)->is_oop()) return; |
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2125 if (_ok) { |
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2126 _nm->print_nmethod(true); |
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2127 _ok = false; |
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2128 } |
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2129 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2130 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2131 } |
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2132 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2133 }; |
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2134 |
0 | 2135 void nmethod::verify() { |
2136 | |
2137 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2138 // seems odd. | |
2139 | |
2140 if( is_zombie() || is_not_entrant() ) | |
2141 return; | |
2142 | |
2143 // Make sure all the entry points are correctly aligned for patching. | |
2144 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2145 | |
2146 assert(method()->is_oop(), "must be valid"); | |
2147 | |
2148 ResourceMark rm; | |
2149 | |
2150 if (!CodeCache::contains(this)) { | |
1490
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2151 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2152 } |
2153 | |
2154 if(is_native_method() ) | |
2155 return; | |
2156 | |
2157 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2158 if (nm != this) { | |
1490
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2159 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2160 this)); |
0 | 2161 } |
2162 | |
2163 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2164 if (! p->verify(this)) { | |
2165 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2166 } | |
2167 } | |
2168 | |
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2169 VerifyOopsClosure voc(this); |
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2170 oops_do(&voc); |
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2171 assert(voc.ok(), "embedded oops must be OK"); |
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2172 verify_scavenge_root_oops(); |
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2173 |
0 | 2174 verify_scopes(); |
2175 } | |
2176 | |
2177 | |
2178 void nmethod::verify_interrupt_point(address call_site) { | |
2179 // This code does not work in release mode since | |
2180 // owns_lock only is available in debug mode. | |
2181 CompiledIC* ic = NULL; | |
2182 Thread *cur = Thread::current(); | |
2183 if (CompiledIC_lock->owner() == cur || | |
2184 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2185 SafepointSynchronize::is_at_safepoint())) { | |
2186 ic = CompiledIC_at(call_site); | |
2187 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2188 } else { | |
2189 MutexLocker ml_verify (CompiledIC_lock); | |
2190 ic = CompiledIC_at(call_site); | |
2191 } | |
2192 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2193 assert(pd != NULL, "PcDesc must exist"); | |
2194 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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2195 pd->obj_decode_offset(), pd->should_reexecute(), |
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2196 pd->return_oop()); |
0 | 2197 !sd->is_top(); sd = sd->sender()) { |
2198 sd->verify(); | |
2199 } | |
2200 } | |
2201 | |
2202 void nmethod::verify_scopes() { | |
2203 if( !method() ) return; // Runtime stubs have no scope | |
2204 if (method()->is_native()) return; // Ignore stub methods. | |
2205 // iterate through all interrupt point | |
2206 // and verify the debug information is valid. | |
2207 RelocIterator iter((nmethod*)this); | |
2208 while (iter.next()) { | |
2209 address stub = NULL; | |
2210 switch (iter.type()) { | |
2211 case relocInfo::virtual_call_type: | |
2212 verify_interrupt_point(iter.addr()); | |
2213 break; | |
2214 case relocInfo::opt_virtual_call_type: | |
2215 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2216 verify_interrupt_point(iter.addr()); | |
2217 break; | |
2218 case relocInfo::static_call_type: | |
2219 stub = iter.static_call_reloc()->static_stub(); | |
2220 //verify_interrupt_point(iter.addr()); | |
2221 break; | |
2222 case relocInfo::runtime_call_type: | |
2223 address destination = iter.reloc()->value(); | |
2224 // Right now there is no way to find out which entries support | |
2225 // an interrupt point. It would be nice if we had this | |
2226 // information in a table. | |
2227 break; | |
2228 } | |
2229 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2230 } | |
2231 } | |
2232 | |
2233 | |
2234 // ----------------------------------------------------------------------------- | |
2235 // Non-product code | |
2236 #ifndef PRODUCT | |
2237 | |
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2238 class DebugScavengeRoot: public OopClosure { |
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2239 nmethod* _nm; |
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2240 bool _ok; |
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2241 public: |
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2242 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2243 bool ok() { return _ok; } |
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2244 virtual void do_oop(oop* p) { |
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2245 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2246 if (_ok) { |
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2247 _nm->print_nmethod(true); |
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2248 _ok = false; |
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2249 } |
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2250 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2251 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2252 (*p)->print(); |
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|
2253 } |
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2254 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2255 }; |
0 | 2256 |
989
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2257 void nmethod::verify_scavenge_root_oops() { |
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2258 if (!on_scavenge_root_list()) { |
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2259 // Actually look inside, to verify the claim that it's clean. |
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2260 DebugScavengeRoot debug_scavenge_root(this); |
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2261 oops_do(&debug_scavenge_root); |
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2262 if (!debug_scavenge_root.ok()) |
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2263 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2264 } |
989
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2265 assert(scavenge_root_not_marked(), ""); |
0 | 2266 } |
2267 | |
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2268 #endif // PRODUCT |
0 | 2269 |
2270 // Printing operations | |
2271 | |
2272 void nmethod::print() const { | |
2273 ResourceMark rm; | |
2274 ttyLocker ttyl; // keep the following output all in one block | |
2275 | |
2276 tty->print("Compiled "); | |
2277 | |
2278 if (is_compiled_by_c1()) { | |
2279 tty->print("(c1) "); | |
2280 } else if (is_compiled_by_c2()) { | |
2281 tty->print("(c2) "); | |
2282 } else { | |
2283 tty->print("(nm) "); | |
2284 } | |
2285 | |
2286 print_on(tty, "nmethod"); | |
2287 tty->cr(); | |
2288 if (WizardMode) { | |
2289 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2290 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2291 tty->print(" { "); | |
2292 if (is_in_use()) tty->print("in_use "); | |
2293 if (is_not_entrant()) tty->print("not_entrant "); | |
2294 if (is_zombie()) tty->print("zombie "); | |
2295 if (is_unloaded()) tty->print("unloaded "); | |
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2296 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2297 tty->print_cr("}:"); |
2298 } | |
2299 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2300 (address)this, | |
2301 (address)this + size(), | |
2302 size()); | |
2303 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2304 relocation_begin(), | |
2305 relocation_end(), | |
2306 relocation_size()); | |
2307 if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2308 code_begin(), | |
2309 code_end(), | |
2310 code_size()); | |
2311 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2312 stub_begin(), | |
2313 stub_end(), | |
2314 stub_size()); | |
2315 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2316 consts_begin(), | |
2317 consts_end(), | |
2318 consts_size()); | |
1563
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2319 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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2320 oops_begin(), |
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2321 oops_end(), |
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2322 oops_size()); |
0 | 2323 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2324 scopes_data_begin(), | |
2325 scopes_data_end(), | |
2326 scopes_data_size()); | |
2327 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2328 scopes_pcs_begin(), | |
2329 scopes_pcs_end(), | |
2330 scopes_pcs_size()); | |
2331 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2332 dependencies_begin(), | |
2333 dependencies_end(), | |
2334 dependencies_size()); | |
2335 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2336 handler_table_begin(), | |
2337 handler_table_end(), | |
2338 handler_table_size()); | |
2339 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2340 nul_chk_table_begin(), | |
2341 nul_chk_table_end(), | |
2342 nul_chk_table_size()); | |
2343 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2344 oops_begin(), | |
2345 oops_end(), | |
2346 oops_size()); | |
2347 } | |
2348 | |
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2349 void nmethod::print_code() { |
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2350 HandleMark hm; |
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2351 ResourceMark m; |
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2352 Disassembler::decode(this); |
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2353 } |
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2354 |
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2355 |
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2356 #ifndef PRODUCT |
0 | 2357 |
2358 void nmethod::print_scopes() { | |
2359 // Find the first pc desc for all scopes in the code and print it. | |
2360 ResourceMark rm; | |
2361 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2362 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2363 continue; | |
2364 | |
2365 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2366 sd->print_on(tty, p); | |
2367 } | |
2368 } | |
2369 | |
2370 void nmethod::print_dependencies() { | |
2371 ResourceMark rm; | |
2372 ttyLocker ttyl; // keep the following output all in one block | |
2373 tty->print_cr("Dependencies:"); | |
2374 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2375 deps.print_dependency(); | |
2376 klassOop ctxk = deps.context_type(); | |
2377 if (ctxk != NULL) { | |
2378 Klass* k = Klass::cast(ctxk); | |
2379 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2380 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2381 } |
2382 } | |
2383 deps.log_dependency(); // put it into the xml log also | |
2384 } | |
2385 } | |
2386 | |
2387 | |
2388 void nmethod::print_relocations() { | |
2389 ResourceMark m; // in case methods get printed via the debugger | |
2390 tty->print_cr("relocations:"); | |
2391 RelocIterator iter(this); | |
2392 iter.print(); | |
2393 if (UseRelocIndex) { | |
2394 jint* index_end = (jint*)relocation_end() - 1; | |
2395 jint index_size = *index_end; | |
2396 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2397 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2398 if (index_size > 0) { | |
2399 jint* ip; | |
2400 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2401 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2402 ip[0], | |
2403 ip[1], | |
2404 header_end()+ip[0], | |
2405 relocation_begin()-1+ip[1]); | |
2406 for (; ip < index_end; ip++) | |
2407 tty->print_cr(" (%d ?)", ip[0]); | |
2408 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2409 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2410 } | |
2411 } | |
2412 } | |
2413 | |
2414 | |
2415 void nmethod::print_pcs() { | |
2416 ResourceMark m; // in case methods get printed via debugger | |
2417 tty->print_cr("pc-bytecode offsets:"); | |
2418 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2419 p->print(this); | |
2420 } | |
2421 } | |
2422 | |
100
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2423 #endif // PRODUCT |
0 | 2424 |
2425 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2426 RelocIterator iter(this, begin, end); | |
2427 bool have_one = false; | |
2428 while (iter.next()) { | |
2429 have_one = true; | |
2430 switch (iter.type()) { | |
2431 case relocInfo::none: return "no_reloc"; | |
2432 case relocInfo::oop_type: { | |
2433 stringStream st; | |
2434 oop_Relocation* r = iter.oop_reloc(); | |
2435 oop obj = r->oop_value(); | |
2436 st.print("oop("); | |
2437 if (obj == NULL) st.print("NULL"); | |
2438 else obj->print_value_on(&st); | |
2439 st.print(")"); | |
2440 return st.as_string(); | |
2441 } | |
2442 case relocInfo::virtual_call_type: return "virtual_call"; | |
2443 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2444 case relocInfo::static_call_type: return "static_call"; | |
2445 case relocInfo::static_stub_type: return "static_stub"; | |
2446 case relocInfo::runtime_call_type: return "runtime_call"; | |
2447 case relocInfo::external_word_type: return "external_word"; | |
2448 case relocInfo::internal_word_type: return "internal_word"; | |
2449 case relocInfo::section_word_type: return "section_word"; | |
2450 case relocInfo::poll_type: return "poll"; | |
2451 case relocInfo::poll_return_type: return "poll_return"; | |
2452 case relocInfo::type_mask: return "type_bit_mask"; | |
2453 } | |
2454 } | |
2455 return have_one ? "other" : NULL; | |
2456 } | |
2457 | |
2458 // Return a the last scope in (begin..end] | |
2459 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2460 PcDesc* p = pc_desc_near(begin+1); | |
2461 if (p != NULL && p->real_pc(this) <= end) { | |
2462 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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2463 p->obj_decode_offset(), p->should_reexecute(), |
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|
2464 p->return_oop()); |
0 | 2465 } |
2466 return NULL; | |
2467 } | |
2468 | |
1155
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2469 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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2470 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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2471 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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2472 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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2473 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2474 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
2475 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); | |
1155
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2476 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
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2477 if (block_begin == entry_point()) { |
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2478 methodHandle m = method(); |
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2479 if (m.not_null()) { |
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|
2480 stream->print(" # "); |
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|
2481 m->print_value_on(stream); |
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|
2482 stream->cr(); |
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|
2483 } |
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2484 if (m.not_null() && !is_osr_method()) { |
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|
2485 ResourceMark rm; |
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|
2486 int sizeargs = m->size_of_parameters(); |
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|
2487 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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diff
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|
2488 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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|
2489 { |
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diff
changeset
|
2490 int sig_index = 0; |
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|
2491 if (!m->is_static()) |
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|
2492 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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diff
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|
2493 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
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diff
changeset
|
2494 BasicType t = ss.type(); |
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diff
changeset
|
2495 sig_bt[sig_index++] = t; |
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diff
changeset
|
2496 if (type2size[t] == 2) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2497 sig_bt[sig_index++] = T_VOID; |
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|
2498 } else { |
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diff
changeset
|
2499 assert(type2size[t] == 1, "size is 1 or 2"); |
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|
2500 } |
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|
2501 } |
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|
2502 assert(sig_index == sizeargs, ""); |
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|
2503 } |
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|
2504 const char* spname = "sp"; // make arch-specific? |
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diff
changeset
|
2505 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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changeset
|
2506 int stack_slot_offset = this->frame_size() * wordSize; |
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1141
diff
changeset
|
2507 int tab1 = 14, tab2 = 24; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2508 int sig_index = 0; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2509 int arg_index = (m->is_static() ? 0 : -1); |
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diff
changeset
|
2510 bool did_old_sp = false; |
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diff
changeset
|
2511 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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diff
changeset
|
2512 bool at_this = (arg_index == -1); |
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diff
changeset
|
2513 bool at_old_sp = false; |
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diff
changeset
|
2514 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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diff
changeset
|
2515 assert(t == sig_bt[sig_index], "sigs in sync"); |
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diff
changeset
|
2516 if (at_this) |
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diff
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|
2517 stream->print(" # this: "); |
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diff
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|
2518 else |
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|
2519 stream->print(" # parm%d: ", arg_index); |
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|
2520 stream->move_to(tab1); |
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|
2521 VMReg fst = regs[sig_index].first(); |
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diff
changeset
|
2522 VMReg snd = regs[sig_index].second(); |
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diff
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|
2523 if (fst->is_reg()) { |
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diff
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|
2524 stream->print("%s", fst->name()); |
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diff
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|
2525 if (snd->is_valid()) { |
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diff
changeset
|
2526 stream->print(":%s", snd->name()); |
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diff
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|
2527 } |
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|
2528 } else if (fst->is_stack()) { |
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diff
changeset
|
2529 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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|
2530 if (offset == stack_slot_offset) at_old_sp = true; |
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|
2531 stream->print("[%s+0x%x]", spname, offset); |
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|
2532 } else { |
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|
2533 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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|
2534 } |
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|
2535 stream->print(" "); |
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changeset
|
2536 stream->move_to(tab2); |
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changeset
|
2537 stream->print("= "); |
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|
2538 if (at_this) { |
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|
2539 m->method_holder()->print_value_on(stream); |
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|
2540 } else { |
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changeset
|
2541 bool did_name = false; |
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changeset
|
2542 if (!at_this && ss.is_object()) { |
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|
2543 symbolOop name = ss.as_symbol_or_null(); |
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diff
changeset
|
2544 if (name != NULL) { |
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changeset
|
2545 name->print_value_on(stream); |
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changeset
|
2546 did_name = true; |
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changeset
|
2547 } |
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changeset
|
2548 } |
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changeset
|
2549 if (!did_name) |
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changeset
|
2550 stream->print("%s", type2name(t)); |
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changeset
|
2551 } |
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|
2552 if (at_old_sp) { |
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diff
changeset
|
2553 stream->print(" (%s of caller)", spname); |
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changeset
|
2554 did_old_sp = true; |
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changeset
|
2555 } |
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|
2556 stream->cr(); |
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changeset
|
2557 sig_index += type2size[t]; |
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changeset
|
2558 arg_index += 1; |
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changeset
|
2559 if (!at_this) ss.next(); |
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2560 } |
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2561 if (!did_old_sp) { |
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2562 stream->print(" # "); |
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2563 stream->move_to(tab1); |
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2564 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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2565 stream->print(" (%s of caller)", spname); |
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2566 stream->cr(); |
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2567 } |
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2568 } |
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2569 } |
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2570 } |
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2571 |
0 | 2572 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2573 // First, find an oopmap in (begin, end]. | |
2574 // We use the odd half-closed interval so that oop maps and scope descs | |
2575 // which are tied to the byte after a call are printed with the call itself. | |
2576 address base = instructions_begin(); | |
2577 OopMapSet* oms = oop_maps(); | |
2578 if (oms != NULL) { | |
2579 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2580 OopMap* om = oms->at(i); | |
2581 address pc = base + om->offset(); | |
2582 if (pc > begin) { | |
2583 if (pc <= end) { | |
100
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2584 st->move_to(column); |
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2585 st->print("; "); |
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2586 om->print_on(st); |
0 | 2587 } |
2588 break; | |
2589 } | |
2590 } | |
2591 } | |
100
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2592 |
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2593 // Print any debug info present at this pc. |
0 | 2594 ScopeDesc* sd = scope_desc_in(begin, end); |
2595 if (sd != NULL) { | |
100
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2596 st->move_to(column); |
0 | 2597 if (sd->bci() == SynchronizationEntryBCI) { |
2598 st->print(";*synchronization entry"); | |
2599 } else { | |
2600 if (sd->method().is_null()) { | |
100
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2601 st->print("method is NULL"); |
0 | 2602 } else if (sd->method()->is_native()) { |
100
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2603 st->print("method is native"); |
0 | 2604 } else { |
2605 address bcp = sd->method()->bcp_from(sd->bci()); | |
2606 Bytecodes::Code bc = Bytecodes::java_code_at(bcp); | |
2607 st->print(";*%s", Bytecodes::name(bc)); | |
2608 switch (bc) { | |
2609 case Bytecodes::_invokevirtual: | |
2610 case Bytecodes::_invokespecial: | |
2611 case Bytecodes::_invokestatic: | |
2612 case Bytecodes::_invokeinterface: | |
2613 { | |
2614 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); | |
2615 st->print(" "); | |
2616 if (invoke->name() != NULL) | |
2617 invoke->name()->print_symbol_on(st); | |
2618 else | |
2619 st->print("<UNKNOWN>"); | |
2620 break; | |
2621 } | |
2622 case Bytecodes::_getfield: | |
2623 case Bytecodes::_putfield: | |
2624 case Bytecodes::_getstatic: | |
2625 case Bytecodes::_putstatic: | |
2626 { | |
1602 | 2627 Bytecode_field* field = Bytecode_field_at(sd->method(), sd->bci()); |
0 | 2628 st->print(" "); |
1602 | 2629 if (field->name() != NULL) |
2630 field->name()->print_symbol_on(st); | |
0 | 2631 else |
2632 st->print("<UNKNOWN>"); | |
2633 } | |
2634 } | |
2635 } | |
2636 } | |
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2637 |
0 | 2638 // Print all scopes |
2639 for (;sd != NULL; sd = sd->sender()) { | |
100
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2640 st->move_to(column); |
0 | 2641 st->print("; -"); |
2642 if (sd->method().is_null()) { | |
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2643 st->print("method is NULL"); |
0 | 2644 } else { |
2645 sd->method()->print_short_name(st); | |
2646 } | |
2647 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2648 if (lineno != -1) { | |
2649 st->print("@%d (line %d)", sd->bci(), lineno); | |
2650 } else { | |
2651 st->print("@%d", sd->bci()); | |
2652 } | |
2653 st->cr(); | |
2654 } | |
2655 } | |
2656 | |
2657 // Print relocation information | |
2658 const char* str = reloc_string_for(begin, end); | |
2659 if (str != NULL) { | |
2660 if (sd != NULL) st->cr(); | |
100
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2661 st->move_to(column); |
0 | 2662 st->print("; {%s}", str); |
2663 } | |
2664 int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); | |
2665 if (cont_offset != 0) { | |
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2666 st->move_to(column); |
0 | 2667 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); |
2668 } | |
2669 | |
2670 } | |
2671 | |
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2672 #ifndef PRODUCT |
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2673 |
0 | 2674 void nmethod::print_value_on(outputStream* st) const { |
2675 print_on(st, "nmethod"); | |
2676 } | |
2677 | |
2678 void nmethod::print_calls(outputStream* st) { | |
2679 RelocIterator iter(this); | |
2680 while (iter.next()) { | |
2681 switch (iter.type()) { | |
2682 case relocInfo::virtual_call_type: | |
2683 case relocInfo::opt_virtual_call_type: { | |
2684 VerifyMutexLocker mc(CompiledIC_lock); | |
2685 CompiledIC_at(iter.reloc())->print(); | |
2686 break; | |
2687 } | |
2688 case relocInfo::static_call_type: | |
2689 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2690 compiledStaticCall_at(iter.reloc())->print(); | |
2691 break; | |
2692 } | |
2693 } | |
2694 } | |
2695 | |
2696 void nmethod::print_handler_table() { | |
2697 ExceptionHandlerTable(this).print(); | |
2698 } | |
2699 | |
2700 void nmethod::print_nul_chk_table() { | |
2701 ImplicitExceptionTable(this).print(instructions_begin()); | |
2702 } | |
2703 | |
2704 void nmethod::print_statistics() { | |
2705 ttyLocker ttyl; | |
2706 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2707 nmethod_stats.print_native_nmethod_stats(); | |
2708 nmethod_stats.print_nmethod_stats(); | |
2709 DebugInformationRecorder::print_statistics(); | |
2710 nmethod_stats.print_pc_stats(); | |
2711 Dependencies::print_statistics(); | |
2712 if (xtty != NULL) xtty->tail("statistics"); | |
2713 } | |
2714 | |
2715 #endif // PRODUCT |