Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 1762:0878d7bae69f
6961697: move nmethod constants section before instruction section
Summary: This is a preparation for 6961690.
Reviewed-by: kvn, never
author | twisti |
---|---|
date | Fri, 27 Aug 2010 01:51:27 -0700 |
parents | 3e8fbc61cee8 |
children | d5d065957597 |
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 } | |
1692 | 68 bool nmethod::is_compiled_by_shark() const { |
69 if (is_native_method()) return false; | |
70 assert(compiler() != NULL, "must be"); | |
71 return compiler()->is_shark(); | |
72 } | |
0 | 73 |
74 | |
75 | |
76 //--------------------------------------------------------------------------------- | |
77 // NMethod statistics | |
78 // They are printed under various flags, including: | |
79 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
80 // (In the latter two cases, they like other stats are printed to the log only.) | |
81 | |
82 #ifndef PRODUCT | |
83 // These variables are put into one block to reduce relocations | |
84 // and make it simpler to print from the debugger. | |
85 static | |
86 struct nmethod_stats_struct { | |
87 int nmethod_count; | |
88 int total_size; | |
89 int relocation_size; | |
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90 int consts_size; |
1748 | 91 int insts_size; |
0 | 92 int stub_size; |
93 int scopes_data_size; | |
94 int scopes_pcs_size; | |
95 int dependencies_size; | |
96 int handler_table_size; | |
97 int nul_chk_table_size; | |
98 int oops_size; | |
99 | |
100 void note_nmethod(nmethod* nm) { | |
101 nmethod_count += 1; | |
102 total_size += nm->size(); | |
103 relocation_size += nm->relocation_size(); | |
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104 consts_size += nm->consts_size(); |
1748 | 105 insts_size += nm->insts_size(); |
0 | 106 stub_size += nm->stub_size(); |
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107 oops_size += nm->oops_size(); |
0 | 108 scopes_data_size += nm->scopes_data_size(); |
109 scopes_pcs_size += nm->scopes_pcs_size(); | |
110 dependencies_size += nm->dependencies_size(); | |
111 handler_table_size += nm->handler_table_size(); | |
112 nul_chk_table_size += nm->nul_chk_table_size(); | |
113 } | |
114 void print_nmethod_stats() { | |
115 if (nmethod_count == 0) return; | |
116 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
117 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
118 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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119 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 120 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 121 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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122 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 123 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
124 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
125 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
126 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
127 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
128 } | |
129 | |
130 int native_nmethod_count; | |
131 int native_total_size; | |
132 int native_relocation_size; | |
1748 | 133 int native_insts_size; |
0 | 134 int native_oops_size; |
135 void note_native_nmethod(nmethod* nm) { | |
136 native_nmethod_count += 1; | |
137 native_total_size += nm->size(); | |
138 native_relocation_size += nm->relocation_size(); | |
1748 | 139 native_insts_size += nm->insts_size(); |
0 | 140 native_oops_size += nm->oops_size(); |
141 } | |
142 void print_native_nmethod_stats() { | |
143 if (native_nmethod_count == 0) return; | |
144 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
145 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
146 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 147 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 148 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
149 } | |
150 | |
151 int pc_desc_resets; // number of resets (= number of caches) | |
152 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
153 int pc_desc_approx; // number of those which have approximate true | |
154 int pc_desc_repeats; // number of _last_pc_desc hits | |
155 int pc_desc_hits; // number of LRU cache hits | |
156 int pc_desc_tests; // total number of PcDesc examinations | |
157 int pc_desc_searches; // total number of quasi-binary search steps | |
158 int pc_desc_adds; // number of LUR cache insertions | |
159 | |
160 void print_pc_stats() { | |
161 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
162 pc_desc_queries, | |
163 (double)(pc_desc_tests + pc_desc_searches) | |
164 / pc_desc_queries); | |
165 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
166 pc_desc_resets, | |
167 pc_desc_queries, pc_desc_approx, | |
168 pc_desc_repeats, pc_desc_hits, | |
169 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
170 } | |
171 } nmethod_stats; | |
172 #endif //PRODUCT | |
173 | |
174 //--------------------------------------------------------------------------------- | |
175 | |
176 | |
177 // The _unwind_handler is a special marker address, which says that | |
178 // for given exception oop and address, the frame should be removed | |
179 // as the tuple cannot be caught in the nmethod | |
180 address ExceptionCache::_unwind_handler = (address) -1; | |
181 | |
182 | |
183 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
184 assert(pc != NULL, "Must be non null"); | |
185 assert(exception.not_null(), "Must be non null"); | |
186 assert(handler != NULL, "Must be non null"); | |
187 | |
188 _count = 0; | |
189 _exception_type = exception->klass(); | |
190 _next = NULL; | |
191 | |
192 add_address_and_handler(pc,handler); | |
193 } | |
194 | |
195 | |
196 address ExceptionCache::match(Handle exception, address pc) { | |
197 assert(pc != NULL,"Must be non null"); | |
198 assert(exception.not_null(),"Must be non null"); | |
199 if (exception->klass() == exception_type()) { | |
200 return (test_address(pc)); | |
201 } | |
202 | |
203 return NULL; | |
204 } | |
205 | |
206 | |
207 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
208 assert(exception.not_null(),"Must be non null"); | |
209 if (exception->klass() == exception_type() && count() < cache_size) { | |
210 return true; | |
211 } | |
212 return false; | |
213 } | |
214 | |
215 | |
216 address ExceptionCache::test_address(address addr) { | |
217 for (int i=0; i<count(); i++) { | |
218 if (pc_at(i) == addr) { | |
219 return handler_at(i); | |
220 } | |
221 } | |
222 return NULL; | |
223 } | |
224 | |
225 | |
226 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
227 if (test_address(addr) == handler) return true; | |
228 if (count() < cache_size) { | |
229 set_pc_at(count(),addr); | |
230 set_handler_at(count(), handler); | |
231 increment_count(); | |
232 return true; | |
233 } | |
234 return false; | |
235 } | |
236 | |
237 | |
238 // private method for handling exception cache | |
239 // These methods are private, and used to manipulate the exception cache | |
240 // directly. | |
241 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
242 ExceptionCache* ec = exception_cache(); | |
243 while (ec != NULL) { | |
244 if (ec->match_exception_with_space(exception)) { | |
245 return ec; | |
246 } | |
247 ec = ec->next(); | |
248 } | |
249 return NULL; | |
250 } | |
251 | |
252 | |
253 //----------------------------------------------------------------------------- | |
254 | |
255 | |
256 // Helper used by both find_pc_desc methods. | |
257 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
258 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
259 if (!approximate) | |
260 return pc->pc_offset() == pc_offset; | |
261 else | |
262 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
263 } | |
264 | |
265 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
266 if (initial_pc_desc == NULL) { | |
267 _last_pc_desc = NULL; // native method | |
268 return; | |
269 } | |
270 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
271 // reset the cache by filling it with benign (non-null) values | |
272 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
273 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
274 for (int i = 0; i < cache_size; i++) | |
275 _pc_descs[i] = initial_pc_desc; | |
276 } | |
277 | |
278 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
279 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
280 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
281 | |
282 // In order to prevent race conditions do not load cache elements | |
283 // repeatedly, but use a local copy: | |
284 PcDesc* res; | |
285 | |
286 // Step one: Check the most recently returned value. | |
287 res = _last_pc_desc; | |
288 if (res == NULL) return NULL; // native method; no PcDescs at all | |
289 if (match_desc(res, pc_offset, approximate)) { | |
290 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
291 return res; | |
292 } | |
293 | |
294 // Step two: Check the LRU cache. | |
295 for (int i = 0; i < cache_size; i++) { | |
296 res = _pc_descs[i]; | |
297 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
298 if (match_desc(res, pc_offset, approximate)) { | |
299 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
300 _last_pc_desc = res; // record this cache hit in case of repeat | |
301 return res; | |
302 } | |
303 } | |
304 | |
305 // Report failure. | |
306 return NULL; | |
307 } | |
308 | |
309 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
310 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
311 // Update the LRU cache by shifting pc_desc forward: | |
312 for (int i = 0; i < cache_size; i++) { | |
313 PcDesc* next = _pc_descs[i]; | |
314 _pc_descs[i] = pc_desc; | |
315 pc_desc = next; | |
316 } | |
317 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
318 } | |
319 | |
320 // adjust pcs_size so that it is a multiple of both oopSize and | |
321 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
322 // of oopSize, then 2*sizeof(PcDesc) is) | |
323 static int adjust_pcs_size(int pcs_size) { | |
324 int nsize = round_to(pcs_size, oopSize); | |
325 if ((nsize % sizeof(PcDesc)) != 0) { | |
326 nsize = pcs_size + sizeof(PcDesc); | |
327 } | |
328 assert((nsize % oopSize) == 0, "correct alignment"); | |
329 return nsize; | |
330 } | |
331 | |
332 //----------------------------------------------------------------------------- | |
333 | |
334 | |
335 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
336 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
337 assert(new_entry != NULL,"Must be non null"); | |
338 assert(new_entry->next() == NULL, "Must be null"); | |
339 | |
340 if (exception_cache() != NULL) { | |
341 new_entry->set_next(exception_cache()); | |
342 } | |
343 set_exception_cache(new_entry); | |
344 } | |
345 | |
346 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
347 ExceptionCache* prev = NULL; | |
348 ExceptionCache* curr = exception_cache(); | |
349 assert(curr != NULL, "nothing to remove"); | |
350 // find the previous and next entry of ec | |
351 while (curr != ec) { | |
352 prev = curr; | |
353 curr = curr->next(); | |
354 assert(curr != NULL, "ExceptionCache not found"); | |
355 } | |
356 // now: curr == ec | |
357 ExceptionCache* next = curr->next(); | |
358 if (prev == NULL) { | |
359 set_exception_cache(next); | |
360 } else { | |
361 prev->set_next(next); | |
362 } | |
363 delete curr; | |
364 } | |
365 | |
366 | |
367 // public method for accessing the exception cache | |
368 // These are the public access methods. | |
369 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
370 // We never grab a lock to read the exception cache, so we may | |
371 // have false negatives. This is okay, as it can only happen during | |
372 // the first few exception lookups for a given nmethod. | |
373 ExceptionCache* ec = exception_cache(); | |
374 while (ec != NULL) { | |
375 address ret_val; | |
376 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
377 return ret_val; | |
378 } | |
379 ec = ec->next(); | |
380 } | |
381 return NULL; | |
382 } | |
383 | |
384 | |
385 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
386 // There are potential race conditions during exception cache updates, so we | |
387 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 388 // we don't lock during reads, it is possible to have several threads attempt |
0 | 389 // to update the cache with the same data. We need to check for already inserted |
390 // copies of the current data before adding it. | |
391 | |
392 MutexLocker ml(ExceptionCache_lock); | |
393 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
394 | |
395 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
396 target_entry = new ExceptionCache(exception,pc,handler); | |
397 add_exception_cache_entry(target_entry); | |
398 } | |
399 } | |
400 | |
401 | |
402 //-------------end of code for ExceptionCache-------------- | |
403 | |
404 | |
405 int nmethod::total_size() const { | |
406 return | |
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407 consts_size() + |
1748 | 408 insts_size() + |
0 | 409 stub_size() + |
410 scopes_data_size() + | |
411 scopes_pcs_size() + | |
412 handler_table_size() + | |
413 nul_chk_table_size(); | |
414 } | |
415 | |
416 const char* nmethod::compile_kind() const { | |
417 if (is_osr_method()) return "osr"; | |
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418 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 419 return NULL; |
420 } | |
421 | |
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422 // Fill in default values for various flag fields |
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423 void nmethod::init_defaults() { |
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424 _state = alive; |
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425 _marked_for_reclamation = 0; |
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426 _has_flushed_dependencies = 0; |
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427 _speculatively_disconnected = 0; |
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428 _has_unsafe_access = 0; |
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429 _has_method_handle_invokes = 0; |
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430 _marked_for_deoptimization = 0; |
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431 _lock_count = 0; |
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432 _stack_traversal_mark = 0; |
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433 _unload_reported = false; // jvmti state |
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434 |
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435 NOT_PRODUCT(_has_debug_info = false); |
1726 | 436 #ifdef ASSERT |
437 _oops_are_stale = false; | |
438 #endif | |
439 | |
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440 _oops_do_mark_link = NULL; |
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441 _jmethod_id = NULL; |
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442 _osr_link = NULL; |
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443 _scavenge_root_link = NULL; |
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444 _scavenge_root_state = 0; |
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445 _saved_nmethod_link = NULL; |
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446 _compiler = NULL; |
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447 |
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448 #ifdef HAVE_DTRACE_H |
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449 _trap_offset = 0; |
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450 #endif // def HAVE_DTRACE_H |
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451 } |
0 | 452 |
453 | |
454 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
455 CodeBuffer *code_buffer, | |
456 int vep_offset, | |
457 int frame_complete, | |
458 int frame_size, | |
459 ByteSize basic_lock_owner_sp_offset, | |
460 ByteSize basic_lock_sp_offset, | |
461 OopMapSet* oop_maps) { | |
462 // create nmethod | |
463 nmethod* nm = NULL; | |
464 { | |
465 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
466 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
467 CodeOffsets offsets; | |
468 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
469 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
470 nm = new (native_nmethod_size) | |
471 nmethod(method(), native_nmethod_size, &offsets, | |
472 code_buffer, frame_size, | |
473 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
474 oop_maps); | |
475 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
476 if (PrintAssembly && nm != NULL) | |
477 Disassembler::decode(nm); | |
478 } | |
479 // verify nmethod | |
480 debug_only(if (nm) nm->verify();) // might block | |
481 | |
482 if (nm != NULL) { | |
483 nm->log_new_nmethod(); | |
484 } | |
485 | |
486 return nm; | |
487 } | |
488 | |
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489 #ifdef HAVE_DTRACE_H |
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490 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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491 CodeBuffer *code_buffer, |
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492 int vep_offset, |
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493 int trap_offset, |
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494 int frame_complete, |
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495 int frame_size) { |
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496 // create nmethod |
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497 nmethod* nm = NULL; |
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498 { |
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499 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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500 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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501 CodeOffsets offsets; |
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502 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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503 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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504 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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505 |
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506 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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507 |
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508 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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509 if (PrintAssembly && nm != NULL) |
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510 Disassembler::decode(nm); |
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511 } |
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512 // verify nmethod |
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513 debug_only(if (nm) nm->verify();) // might block |
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514 |
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515 if (nm != NULL) { |
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516 nm->log_new_nmethod(); |
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517 } |
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518 |
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519 return nm; |
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520 } |
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521 |
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522 #endif // def HAVE_DTRACE_H |
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523 |
0 | 524 nmethod* nmethod::new_nmethod(methodHandle method, |
525 int compile_id, | |
526 int entry_bci, | |
527 CodeOffsets* offsets, | |
528 int orig_pc_offset, | |
529 DebugInformationRecorder* debug_info, | |
530 Dependencies* dependencies, | |
531 CodeBuffer* code_buffer, int frame_size, | |
532 OopMapSet* oop_maps, | |
533 ExceptionHandlerTable* handler_table, | |
534 ImplicitExceptionTable* nul_chk_table, | |
535 AbstractCompiler* compiler, | |
536 int comp_level | |
537 ) | |
538 { | |
539 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
540 // create nmethod | |
541 nmethod* nm = NULL; | |
542 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
543 int nmethod_size = | |
544 allocation_size(code_buffer, sizeof(nmethod)) | |
545 + adjust_pcs_size(debug_info->pcs_size()) | |
546 + round_to(dependencies->size_in_bytes() , oopSize) | |
547 + round_to(handler_table->size_in_bytes(), oopSize) | |
548 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
549 + round_to(debug_info->data_size() , oopSize); | |
550 nm = new (nmethod_size) | |
551 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
552 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
553 oop_maps, | |
554 handler_table, | |
555 nul_chk_table, | |
556 compiler, | |
557 comp_level); | |
558 if (nm != NULL) { | |
559 // To make dependency checking during class loading fast, record | |
560 // the nmethod dependencies in the classes it is dependent on. | |
561 // This allows the dependency checking code to simply walk the | |
562 // class hierarchy above the loaded class, checking only nmethods | |
563 // which are dependent on those classes. The slow way is to | |
564 // check every nmethod for dependencies which makes it linear in | |
565 // the number of methods compiled. For applications with a lot | |
566 // classes the slow way is too slow. | |
567 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
568 klassOop klass = deps.context_type(); | |
569 if (klass == NULL) continue; // ignore things like evol_method | |
570 | |
571 // record this nmethod as dependent on this klass | |
572 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
573 } | |
574 } | |
575 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
576 if (PrintAssembly && nm != NULL) | |
577 Disassembler::decode(nm); | |
578 } | |
579 | |
580 // verify nmethod | |
581 debug_only(if (nm) nm->verify();) // might block | |
582 | |
583 if (nm != NULL) { | |
584 nm->log_new_nmethod(); | |
585 } | |
586 | |
587 // done | |
588 return nm; | |
589 } | |
590 | |
591 | |
592 // For native wrappers | |
593 nmethod::nmethod( | |
594 methodOop method, | |
595 int nmethod_size, | |
596 CodeOffsets* offsets, | |
597 CodeBuffer* code_buffer, | |
598 int frame_size, | |
599 ByteSize basic_lock_owner_sp_offset, | |
600 ByteSize basic_lock_sp_offset, | |
601 OopMapSet* oop_maps ) | |
602 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
603 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
604 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), | |
605 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) | |
606 { | |
607 { | |
608 debug_only(No_Safepoint_Verifier nsv;) | |
609 assert_locked_or_safepoint(CodeCache_lock); | |
610 | |
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611 init_defaults(); |
0 | 612 _method = method; |
613 _entry_bci = InvocationEntryBci; | |
614 // We have no exception handler or deopt handler make the | |
615 // values something that will never match a pc like the nmethod vtable entry | |
616 _exception_offset = 0; | |
617 _deoptimize_offset = 0; | |
1204 | 618 _deoptimize_mh_offset = 0; |
0 | 619 _orig_pc_offset = 0; |
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620 |
1748 | 621 _consts_offset = data_offset(); |
0 | 622 _stub_offset = data_offset(); |
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623 _oops_offset = data_offset(); |
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624 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 625 _scopes_pcs_offset = _scopes_data_offset; |
626 _dependencies_offset = _scopes_pcs_offset; | |
627 _handler_table_offset = _dependencies_offset; | |
628 _nul_chk_table_offset = _handler_table_offset; | |
629 _nmethod_end_offset = _nul_chk_table_offset; | |
630 _compile_id = 0; // default | |
631 _comp_level = CompLevel_none; | |
1748 | 632 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
633 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 634 _osr_entry_point = NULL; |
635 _exception_cache = NULL; | |
636 _pc_desc_cache.reset_to(NULL); | |
637 | |
638 code_buffer->copy_oops_to(this); | |
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639 debug_only(verify_scavenge_root_oops()); |
0 | 640 CodeCache::commit(this); |
641 } | |
642 | |
643 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
644 ttyLocker ttyl; // keep the following output all in one block | |
645 // This output goes directly to the tty, not the compiler log. | |
646 // To enable tools to match it up with the compilation activity, | |
647 // be sure to tag this tty output with the compile ID. | |
648 if (xtty != NULL) { | |
649 xtty->begin_head("print_native_nmethod"); | |
650 xtty->method(_method); | |
651 xtty->stamp(); | |
652 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
653 } | |
654 // print the header part first | |
655 print(); | |
656 // then print the requested information | |
657 if (PrintNativeNMethods) { | |
658 print_code(); | |
659 oop_maps->print(); | |
660 } | |
661 if (PrintRelocations) { | |
662 print_relocations(); | |
663 } | |
664 if (xtty != NULL) { | |
665 xtty->tail("print_native_nmethod"); | |
666 } | |
667 } | |
668 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
669 } | |
670 | |
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671 // For dtrace wrappers |
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672 #ifdef HAVE_DTRACE_H |
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673 nmethod::nmethod( |
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674 methodOop method, |
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675 int nmethod_size, |
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676 CodeOffsets* offsets, |
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677 CodeBuffer* code_buffer, |
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678 int frame_size) |
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679 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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680 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
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681 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
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682 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
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683 { |
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684 { |
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685 debug_only(No_Safepoint_Verifier nsv;) |
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686 assert_locked_or_safepoint(CodeCache_lock); |
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687 |
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688 init_defaults(); |
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689 _method = method; |
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690 _entry_bci = InvocationEntryBci; |
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691 // We have no exception handler or deopt handler make the |
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692 // values something that will never match a pc like the nmethod vtable entry |
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693 _exception_offset = 0; |
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694 _deoptimize_offset = 0; |
1204 | 695 _deoptimize_mh_offset = 0; |
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696 _unwind_handler_offset = -1; |
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697 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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698 _orig_pc_offset = 0; |
1748 | 699 _consts_offset = data_offset(); |
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700 _stub_offset = data_offset(); |
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701 _oops_offset = data_offset(); |
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702 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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703 _scopes_pcs_offset = _scopes_data_offset; |
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704 _dependencies_offset = _scopes_pcs_offset; |
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705 _handler_table_offset = _dependencies_offset; |
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706 _nul_chk_table_offset = _handler_table_offset; |
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707 _nmethod_end_offset = _nul_chk_table_offset; |
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708 _compile_id = 0; // default |
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709 _comp_level = CompLevel_none; |
1748 | 710 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
711 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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712 _osr_entry_point = NULL; |
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713 _exception_cache = NULL; |
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714 _pc_desc_cache.reset_to(NULL); |
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715 |
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716 code_buffer->copy_oops_to(this); |
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717 debug_only(verify_scavenge_root_oops()); |
116
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718 CodeCache::commit(this); |
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719 } |
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720 |
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721 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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722 ttyLocker ttyl; // keep the following output all in one block |
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723 // This output goes directly to the tty, not the compiler log. |
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724 // To enable tools to match it up with the compilation activity, |
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725 // be sure to tag this tty output with the compile ID. |
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726 if (xtty != NULL) { |
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727 xtty->begin_head("print_dtrace_nmethod"); |
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728 xtty->method(_method); |
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729 xtty->stamp(); |
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730 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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731 } |
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732 // print the header part first |
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733 print(); |
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734 // then print the requested information |
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735 if (PrintNMethods) { |
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736 print_code(); |
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737 } |
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738 if (PrintRelocations) { |
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739 print_relocations(); |
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740 } |
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741 if (xtty != NULL) { |
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742 xtty->tail("print_dtrace_nmethod"); |
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743 } |
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744 } |
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745 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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746 } |
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747 #endif // def HAVE_DTRACE_H |
0 | 748 |
749 void* nmethod::operator new(size_t size, int nmethod_size) { | |
750 // Always leave some room in the CodeCache for I2C/C2I adapters | |
751 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
752 return CodeCache::allocate(nmethod_size); | |
753 } | |
754 | |
755 | |
756 nmethod::nmethod( | |
757 methodOop method, | |
758 int nmethod_size, | |
759 int compile_id, | |
760 int entry_bci, | |
761 CodeOffsets* offsets, | |
762 int orig_pc_offset, | |
763 DebugInformationRecorder* debug_info, | |
764 Dependencies* dependencies, | |
765 CodeBuffer *code_buffer, | |
766 int frame_size, | |
767 OopMapSet* oop_maps, | |
768 ExceptionHandlerTable* handler_table, | |
769 ImplicitExceptionTable* nul_chk_table, | |
770 AbstractCompiler* compiler, | |
771 int comp_level | |
772 ) | |
773 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
774 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
775 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), | |
776 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) | |
777 { | |
778 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
779 { | |
780 debug_only(No_Safepoint_Verifier nsv;) | |
781 assert_locked_or_safepoint(CodeCache_lock); | |
782 | |
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783 init_defaults(); |
0 | 784 _method = method; |
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785 _entry_bci = entry_bci; |
0 | 786 _compile_id = compile_id; |
787 _comp_level = comp_level; | |
788 _compiler = compiler; | |
789 _orig_pc_offset = orig_pc_offset; | |
1748 | 790 |
791 // Section offsets | |
1762
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792 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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793 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 794 |
795 // Exception handler and deopt handler are in the stub section | |
1748 | 796 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
797 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
1762
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798 if (has_method_handle_invokes()) { |
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799 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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800 } else { |
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801 _deoptimize_mh_offset = -1; |
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802 } |
1378
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803 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 804 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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805 } else { |
1748 | 806 _unwind_handler_offset = -1; |
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807 } |
1748 | 808 |
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809 _oops_offset = data_offset(); |
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810 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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811 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 812 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
813 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
814 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
815 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
816 | |
1748 | 817 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
818 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
819 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 820 _exception_cache = NULL; |
821 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
822 | |
823 // Copy contents of ScopeDescRecorder to nmethod | |
824 code_buffer->copy_oops_to(this); | |
825 debug_info->copy_to(this); | |
826 dependencies->copy_to(this); | |
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827 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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828 CodeCache::add_scavenge_root_nmethod(this); |
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829 } |
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830 debug_only(verify_scavenge_root_oops()); |
0 | 831 |
832 CodeCache::commit(this); | |
833 | |
834 // Copy contents of ExceptionHandlerTable to nmethod | |
835 handler_table->copy_to(this); | |
836 nul_chk_table->copy_to(this); | |
837 | |
838 // we use the information of entry points to find out if a method is | |
839 // static or non static | |
840 assert(compiler->is_c2() || | |
841 _method->is_static() == (entry_point() == _verified_entry_point), | |
842 " entry points must be same for static methods and vice versa"); | |
843 } | |
844 | |
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845 bool printnmethods = PrintNMethods |
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846 || CompilerOracle::should_print(_method) |
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847 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 848 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
849 print_nmethod(printnmethods); | |
850 } | |
851 | |
852 // Note: Do not verify in here as the CodeCache_lock is | |
853 // taken which would conflict with the CompiledIC_lock | |
854 // which taken during the verification of call sites. | |
855 // (was bug - gri 10/25/99) | |
856 | |
857 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
858 } | |
859 | |
860 | |
861 // Print a short set of xml attributes to identify this nmethod. The | |
862 // output should be embedded in some other element. | |
863 void nmethod::log_identity(xmlStream* log) const { | |
864 log->print(" compile_id='%d'", compile_id()); | |
865 const char* nm_kind = compile_kind(); | |
866 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
867 if (compiler() != NULL) { | |
868 log->print(" compiler='%s'", compiler()->name()); | |
869 } | |
870 #ifdef TIERED | |
871 log->print(" level='%d'", comp_level()); | |
872 #endif // TIERED | |
873 } | |
874 | |
875 | |
876 #define LOG_OFFSET(log, name) \ | |
877 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
878 log->print(" " XSTR(name) "_offset='%d'" , \ | |
879 (intptr_t)name##_begin() - (intptr_t)this) | |
880 | |
881 | |
882 void nmethod::log_new_nmethod() const { | |
883 if (LogCompilation && xtty != NULL) { | |
884 ttyLocker ttyl; | |
885 HandleMark hm; | |
886 xtty->begin_elem("nmethod"); | |
887 log_identity(xtty); | |
1748 | 888 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 889 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
890 | |
891 LOG_OFFSET(xtty, relocation); | |
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892 LOG_OFFSET(xtty, consts); |
1748 | 893 LOG_OFFSET(xtty, insts); |
0 | 894 LOG_OFFSET(xtty, stub); |
895 LOG_OFFSET(xtty, scopes_data); | |
896 LOG_OFFSET(xtty, scopes_pcs); | |
897 LOG_OFFSET(xtty, dependencies); | |
898 LOG_OFFSET(xtty, handler_table); | |
899 LOG_OFFSET(xtty, nul_chk_table); | |
900 LOG_OFFSET(xtty, oops); | |
901 | |
902 xtty->method(method()); | |
903 xtty->stamp(); | |
904 xtty->end_elem(); | |
905 } | |
906 } | |
907 | |
908 #undef LOG_OFFSET | |
909 | |
910 | |
911 // Print out more verbose output usually for a newly created nmethod. | |
912 void nmethod::print_on(outputStream* st, const char* title) const { | |
913 if (st != NULL) { | |
914 ttyLocker ttyl; | |
915 // Print a little tag line that looks like +PrintCompilation output: | |
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916 int tlen = (int) strlen(title); |
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917 bool do_nl = false; |
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918 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } |
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919 st->print("%3d%c %.*s", |
0 | 920 compile_id(), |
921 is_osr_method() ? '%' : | |
922 method() != NULL && | |
923 is_native_method() ? 'n' : ' ', | |
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924 tlen, title); |
0 | 925 #ifdef TIERED |
926 st->print(" (%d) ", comp_level()); | |
927 #endif // TIERED | |
928 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); | |
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929 if (Universe::heap()->is_gc_active() && method() != NULL) { |
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930 st->print("(method)"); |
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931 } else if (method() != NULL) { |
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932 method()->print_short_name(st); |
0 | 933 if (is_osr_method()) |
934 st->print(" @ %d", osr_entry_bci()); | |
935 if (method()->code_size() > 0) | |
936 st->print(" (%d bytes)", method()->code_size()); | |
937 } | |
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938 |
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939 if (do_nl) st->cr(); |
0 | 940 } |
941 } | |
942 | |
943 | |
944 void nmethod::print_nmethod(bool printmethod) { | |
945 ttyLocker ttyl; // keep the following output all in one block | |
946 if (xtty != NULL) { | |
947 xtty->begin_head("print_nmethod"); | |
948 xtty->stamp(); | |
949 xtty->end_head(); | |
950 } | |
951 // print the header part first | |
952 print(); | |
953 // then print the requested information | |
954 if (printmethod) { | |
955 print_code(); | |
956 print_pcs(); | |
957 oop_maps()->print(); | |
958 } | |
959 if (PrintDebugInfo) { | |
960 print_scopes(); | |
961 } | |
962 if (PrintRelocations) { | |
963 print_relocations(); | |
964 } | |
965 if (PrintDependencies) { | |
966 print_dependencies(); | |
967 } | |
968 if (PrintExceptionHandlers) { | |
969 print_handler_table(); | |
970 print_nul_chk_table(); | |
971 } | |
972 if (xtty != NULL) { | |
973 xtty->tail("print_nmethod"); | |
974 } | |
975 } | |
976 | |
977 | |
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978 // Promote one word from an assembly-time handle to a live embedded oop. |
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979 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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980 if (handle == NULL || |
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981 // As a special case, IC oops are initialized to 1 or -1. |
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982 handle == (jobject) Universe::non_oop_word()) { |
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983 (*dest) = (oop) handle; |
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984 } else { |
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985 (*dest) = JNIHandles::resolve_non_null(handle); |
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986 } |
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987 } |
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988 |
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989 |
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990 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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991 //assert(oops_size() == 0, "do this handshake just once, please"); |
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992 int length = array->length(); |
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993 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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994 oop* dest = oops_begin(); |
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995 for (int index = 0 ; index < length; index++) { |
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996 initialize_immediate_oop(&dest[index], array->at(index)); |
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997 } |
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998 |
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999 // Now we can fix up all the oops in the code. We need to do this |
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1000 // in the code because the assembler uses jobjects as placeholders. |
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1001 // The code and relocations have already been initialized by the |
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1002 // CodeBlob constructor, so it is valid even at this early point to |
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1003 // iterate over relocations and patch the code. |
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1004 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1005 } |
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1006 |
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1007 |
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1008 bool nmethod::is_at_poll_return(address pc) { |
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1009 RelocIterator iter(this, pc, pc+1); |
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1010 while (iter.next()) { |
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1011 if (iter.type() == relocInfo::poll_return_type) |
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1012 return true; |
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1013 } |
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1014 return false; |
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1015 } |
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1016 |
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1017 |
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1018 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1019 RelocIterator iter(this, pc, pc+1); |
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1020 while (iter.next()) { |
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1021 relocInfo::relocType t = iter.type(); |
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1022 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1023 return true; |
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1024 } |
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1025 return false; |
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1026 } |
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1027 |
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1028 |
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1029 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1030 // re-patch all oop-bearing instructions, just in case some oops moved |
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1031 RelocIterator iter(this, begin, end); |
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1032 while (iter.next()) { |
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1033 if (iter.type() == relocInfo::oop_type) { |
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1034 oop_Relocation* reloc = iter.oop_reloc(); |
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1035 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1036 oop* dest = reloc->oop_addr(); |
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1037 initialize_immediate_oop(dest, (jobject) *dest); |
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1038 } |
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1039 // Refresh the oop-related bits of this instruction. |
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1040 reloc->fix_oop_relocation(); |
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1041 } |
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1042 |
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1043 // There must not be any interfering patches or breakpoints. |
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1044 assert(!(iter.type() == relocInfo::breakpoint_type |
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1045 && iter.breakpoint_reloc()->active()), |
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1046 "no active breakpoint"); |
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1047 } |
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1048 } |
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1049 |
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1050 |
0 | 1051 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1052 PcDesc* pd = pc_desc_at(pc); | |
1053 guarantee(pd != NULL, "scope must be present"); | |
1054 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1055 pd->obj_decode_offset(), pd->should_reexecute(), |
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1056 pd->return_oop()); |
0 | 1057 } |
1058 | |
1059 | |
1060 void nmethod::clear_inline_caches() { | |
1061 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1062 if (is_zombie()) { | |
1063 return; | |
1064 } | |
1065 | |
1066 RelocIterator iter(this); | |
1067 while (iter.next()) { | |
1068 iter.reloc()->clear_inline_cache(); | |
1069 } | |
1070 } | |
1071 | |
1072 | |
1073 void nmethod::cleanup_inline_caches() { | |
1074 | |
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1075 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1076 |
1077 // If the method is not entrant or zombie then a JMP is plastered over the | |
1078 // first few bytes. If an oop in the old code was there, that oop | |
1079 // should not get GC'd. Skip the first few bytes of oops on | |
1080 // not-entrant methods. | |
1081 address low_boundary = verified_entry_point(); | |
1082 if (!is_in_use()) { | |
1083 low_boundary += NativeJump::instruction_size; | |
1084 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1085 // This means that the low_boundary is going to be a little too high. | |
1086 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1087 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1088 } | |
1089 | |
1090 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1091 ResourceMark rm; | |
1092 RelocIterator iter(this, low_boundary); | |
1093 while(iter.next()) { | |
1094 switch(iter.type()) { | |
1095 case relocInfo::virtual_call_type: | |
1096 case relocInfo::opt_virtual_call_type: { | |
1097 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1098 // Ok, to lookup references to zombies here | |
1099 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1100 if( cb != NULL && cb->is_nmethod() ) { | |
1101 nmethod* nm = (nmethod*)cb; | |
1102 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1103 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1104 } |
1105 break; | |
1106 } | |
1107 case relocInfo::static_call_type: { | |
1108 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1109 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1110 if( cb != NULL && cb->is_nmethod() ) { | |
1111 nmethod* nm = (nmethod*)cb; | |
1112 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1113 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1114 } |
1115 break; | |
1116 } | |
1117 } | |
1118 } | |
1119 } | |
1120 | |
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1121 // This is a private interface with the sweeper. |
0 | 1122 void nmethod::mark_as_seen_on_stack() { |
1123 assert(is_not_entrant(), "must be a non-entrant method"); | |
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1124 // Set the traversal mark to ensure that the sweeper does 2 |
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1125 // cleaning passes before moving to zombie. |
0 | 1126 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1127 } | |
1128 | |
1129 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
1130 bool nmethod::can_not_entrant_be_converted() { | |
1131 assert(is_not_entrant(), "must be a non-entrant method"); | |
1132 | |
1133 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1134 // count can be greater than the stack traversal count before it hits the | |
1135 // nmethod for the second time. | |
1136 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
1137 } | |
1138 | |
1139 void nmethod::inc_decompile_count() { | |
1140 // Could be gated by ProfileTraps, but do not bother... | |
1141 methodOop m = method(); | |
1142 if (m == NULL) return; | |
1143 methodDataOop mdo = m->method_data(); | |
1144 if (mdo == NULL) return; | |
1145 // There is a benign race here. See comments in methodDataOop.hpp. | |
1146 mdo->inc_decompile_count(); | |
1147 } | |
1148 | |
1149 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1150 | |
1151 post_compiled_method_unload(); | |
1152 | |
1153 // Since this nmethod is being unloaded, make sure that dependencies | |
1154 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1155 // indicate that this work is being done during a GC. | |
1156 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1157 assert(is_alive != NULL, "Should be non-NULL"); | |
1158 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1159 flush_dependencies(is_alive); | |
1160 | |
1161 // Break cycle between nmethod & method | |
1162 if (TraceClassUnloading && WizardMode) { | |
1163 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1164 " unloadable], methodOop(" INTPTR_FORMAT | |
1165 "), cause(" INTPTR_FORMAT ")", | |
1166 this, (address)_method, (address)cause); | |
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1167 if (!Universe::heap()->is_gc_active()) |
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1168 cause->klass()->print(); |
0 | 1169 } |
941 | 1170 // Unlink the osr method, so we do not look this up again |
1171 if (is_osr_method()) { | |
1172 invalidate_osr_method(); | |
1173 } | |
0 | 1174 // If _method is already NULL the methodOop is about to be unloaded, |
1175 // so we don't have to break the cycle. Note that it is possible to | |
1176 // have the methodOop live here, in case we unload the nmethod because | |
1177 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1178 if (_method != NULL) { | |
1179 // OSR methods point to the methodOop, but the methodOop does not | |
1180 // point back! | |
1181 if (_method->code() == this) { | |
1182 _method->clear_code(); // Break a cycle | |
1183 } | |
1184 _method = NULL; // Clear the method of this dead nmethod | |
1185 } | |
1186 // Make the class unloaded - i.e., change state and notify sweeper | |
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1187 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1188 if (is_in_use()) { |
1189 // Transitioning directly from live to unloaded -- so | |
1190 // we need to force a cache clean-up; remember this | |
1191 // for later on. | |
1192 CodeCache::set_needs_cache_clean(true); | |
1193 } | |
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1194 _state = unloaded; |
0 | 1195 |
1109
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1196 // Log the unloading. |
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1197 log_state_change(); |
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1198 |
0 | 1199 // The methodOop is gone at this point |
1200 assert(_method == NULL, "Tautology"); | |
1201 | |
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1202 set_osr_link(NULL); |
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1203 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1204 NMethodSweeper::notify(this); |
1205 } | |
1206 | |
1207 void nmethod::invalidate_osr_method() { | |
1208 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1209 // Remove from list of active nmethods | |
1210 if (method() != NULL) | |
1211 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1212 // Set entry as invalid | |
1213 _entry_bci = InvalidOSREntryBci; | |
1214 } | |
1215 | |
1109
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1216 void nmethod::log_state_change() const { |
0 | 1217 if (LogCompilation) { |
1218 if (xtty != NULL) { | |
1219 ttyLocker ttyl; // keep the following output all in one block | |
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1220 if (_state == unloaded) { |
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1221 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1222 os::current_thread_id()); |
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1223 } else { |
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1224 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1225 os::current_thread_id(), |
1644
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1226 (_state == zombie ? " zombie='1'" : "")); |
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1227 } |
0 | 1228 log_identity(xtty); |
1229 xtty->stamp(); | |
1230 xtty->end_elem(); | |
1231 } | |
1232 } | |
1644
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1233 if (PrintCompilation && _state != unloaded) { |
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1234 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
0 | 1235 tty->cr(); |
1236 } | |
1237 } | |
1238 | |
1239 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1240 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1241 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
1242 | |
1644
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1243 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1244 nmethodLocker nml(this); |
1644
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1245 methodHandle the_method(method()); |
1726 | 1246 No_Safepoint_Verifier nsv; |
0 | 1247 |
1248 { | |
1206
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1249 // If the method is already zombie there is nothing to do |
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1250 if (is_zombie()) { |
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1251 return false; |
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1252 } |
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1253 |
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1254 // invalidate osr nmethod before acquiring the patching lock since |
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1255 // they both acquire leaf locks and we don't want a deadlock. |
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1256 // This logic is equivalent to the logic below for patching the |
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1257 // verified entry point of regular methods. |
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1258 if (is_osr_method()) { |
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1259 // this effectively makes the osr nmethod not entrant |
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1260 invalidate_osr_method(); |
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1261 } |
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1262 |
0 | 1263 // Enter critical section. Does not block for safepoint. |
1264 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1265 |
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1266 if (_state == state) { |
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1267 // another thread already performed this transition so nothing |
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1268 // to do, but return false to indicate this. |
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1269 return false; |
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1270 } |
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1271 |
0 | 1272 // The caller can be calling the method statically or through an inline |
1273 // cache call. | |
1109
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1274 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1275 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1276 SharedRuntime::get_handle_wrong_method_stub()); | |
1277 } | |
1278 | |
1644
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1279 if (is_in_use()) { |
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1280 // It's a true state change, so mark the method as decompiled. |
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1281 // Do it only for transition from alive. |
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1282 inc_decompile_count(); |
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1283 } |
1206
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1284 |
0 | 1285 // Change state |
1644
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1286 _state = state; |
1109
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1287 |
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1288 // Log the transition once |
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1289 log_state_change(); |
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1290 |
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1291 // Remove nmethod from method. |
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1292 // We need to check if both the _code and _from_compiled_code_entry_point |
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1293 // refer to this nmethod because there is a race in setting these two fields |
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1294 // in methodOop as seen in bugid 4947125. |
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1295 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1296 // could be flushed and the compiler and vtable stubs could still call |
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1297 // through it. |
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1298 if (method() != NULL && (method()->code() == this || |
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1299 method()->from_compiled_entry() == verified_entry_point())) { |
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1300 HandleMark hm; |
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1301 method()->clear_code(); |
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1302 } |
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1303 |
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1304 if (state == not_entrant) { |
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1305 mark_as_seen_on_stack(); |
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1306 } |
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1307 |
0 | 1308 } // leave critical region under Patching_lock |
1309 | |
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1310 // When the nmethod becomes zombie it is no longer alive so the |
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1311 // dependencies must be flushed. nmethods in the not_entrant |
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1312 // state will be flushed later when the transition to zombie |
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1313 // happens or they get unloaded. |
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1314 if (state == zombie) { |
1726 | 1315 { |
1316 // Flushing dependecies must be done before any possible | |
1317 // safepoint can sneak in, otherwise the oops used by the | |
1318 // dependency logic could have become stale. | |
1319 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1320 flush_dependencies(NULL); | |
1321 } | |
1644
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1322 |
1726 | 1323 { |
1324 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
1325 // and it hasn't already been reported for this nmethod then report it now. | |
1326 // (the event may have been reported earilier if the GC marked it for unloading). | |
1327 Pause_No_Safepoint_Verifier pnsv(&nsv); | |
1328 post_compiled_method_unload(); | |
1329 } | |
1330 | |
1331 #ifdef ASSERT | |
1332 // It's no longer safe to access the oops section since zombie | |
1333 // nmethods aren't scanned for GC. | |
1334 _oops_are_stale = true; | |
1335 #endif | |
1538
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1336 } else { |
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1337 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1338 } |
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1339 |
0 | 1340 if (TraceCreateZombies) { |
1341 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1342 } | |
1343 | |
1344 // Make sweeper aware that there is a zombie method that needs to be removed | |
1345 NMethodSweeper::notify(this); | |
1346 | |
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1347 return true; |
0 | 1348 } |
1349 | |
1350 void nmethod::flush() { | |
1351 // Note that there are no valid oops in the nmethod anymore. | |
1352 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1353 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1354 | |
1355 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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1356 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1357 |
1358 // completely deallocate this method | |
1359 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1360 if (PrintMethodFlushing) { | |
1202 | 1361 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1362 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1363 } |
1364 | |
1365 // We need to deallocate any ExceptionCache data. | |
1366 // Note that we do not need to grab the nmethod lock for this, it | |
1367 // better be thread safe if we're disposing of it! | |
1368 ExceptionCache* ec = exception_cache(); | |
1369 set_exception_cache(NULL); | |
1370 while(ec != NULL) { | |
1371 ExceptionCache* next = ec->next(); | |
1372 delete ec; | |
1373 ec = next; | |
1374 } | |
1375 | |
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1376 if (on_scavenge_root_list()) { |
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1377 CodeCache::drop_scavenge_root_nmethod(this); |
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1378 } |
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1379 |
1202 | 1380 if (is_speculatively_disconnected()) { |
1381 CodeCache::remove_saved_code(this); | |
1382 } | |
1383 | |
1692 | 1384 #ifdef SHARK |
1385 ((SharkCompiler *) compiler())->free_compiled_method(instructions_begin()); | |
1386 #endif // SHARK | |
1387 | |
0 | 1388 ((CodeBlob*)(this))->flush(); |
1389 | |
1390 CodeCache::free(this); | |
1391 } | |
1392 | |
1393 | |
1394 // | |
1395 // Notify all classes this nmethod is dependent on that it is no | |
1396 // longer dependent. This should only be called in two situations. | |
1397 // First, when a nmethod transitions to a zombie all dependents need | |
1398 // to be clear. Since zombification happens at a safepoint there's no | |
1399 // synchronization issues. The second place is a little more tricky. | |
1400 // During phase 1 of mark sweep class unloading may happen and as a | |
1401 // result some nmethods may get unloaded. In this case the flushing | |
1402 // of dependencies must happen during phase 1 since after GC any | |
1403 // dependencies in the unloaded nmethod won't be updated, so | |
1404 // traversing the dependency information in unsafe. In that case this | |
1405 // function is called with a non-NULL argument and this function only | |
1406 // notifies instanceKlasses that are reachable | |
1407 | |
1408 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1409 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1410 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1411 "is_alive is non-NULL if and only if we are called during GC"); | |
1412 if (!has_flushed_dependencies()) { | |
1413 set_has_flushed_dependencies(); | |
1414 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1415 klassOop klass = deps.context_type(); | |
1416 if (klass == NULL) continue; // ignore things like evol_method | |
1417 | |
1418 // During GC the is_alive closure is non-NULL, and is used to | |
1419 // determine liveness of dependees that need to be updated. | |
1420 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1421 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1422 } | |
1423 } | |
1424 } | |
1425 } | |
1426 | |
1427 | |
1428 // If this oop is not live, the nmethod can be unloaded. | |
1429 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1430 OopClosure* keep_alive, | |
1431 oop* root, bool unloading_occurred) { | |
1432 assert(root != NULL, "just checking"); | |
1433 oop obj = *root; | |
1434 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1435 return false; | |
1436 } | |
1437 if (obj->is_compiledICHolder()) { | |
1438 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1439 if (is_alive->do_object_b( | |
1440 cichk_oop->holder_method()->method_holder()) && | |
1441 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1442 // The oop should be kept alive | |
1443 keep_alive->do_oop(root); | |
1444 return false; | |
1445 } | |
1446 } | |
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1447 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1448 // simply because one of its constant oops has gone dead. |
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1449 // No actual classes need to be unloaded in order for this to occur. |
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1450 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1451 make_unloaded(is_alive, obj); |
1452 return true; | |
1453 } | |
1454 | |
1455 // ------------------------------------------------------------------ | |
1456 // post_compiled_method_load_event | |
1457 // new method for install_code() path | |
1458 // Transfer information from compilation to jvmti | |
1459 void nmethod::post_compiled_method_load_event() { | |
1460 | |
1461 methodOop moop = method(); | |
1462 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1463 moop->klass_name()->bytes(), | |
1464 moop->klass_name()->utf8_length(), | |
1465 moop->name()->bytes(), | |
1466 moop->name()->utf8_length(), | |
1467 moop->signature()->bytes(), | |
1468 moop->signature()->utf8_length(), | |
1748 | 1469 insts_begin(), insts_size()); |
0 | 1470 |
1616
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1471 if (JvmtiExport::should_post_compiled_method_load() || |
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1472 JvmtiExport::should_post_compiled_method_unload()) { |
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1473 get_and_cache_jmethod_id(); |
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1474 } |
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1475 |
0 | 1476 if (JvmtiExport::should_post_compiled_method_load()) { |
1477 JvmtiExport::post_compiled_method_load(this); | |
1478 } | |
1479 } | |
1480 | |
1616
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1481 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1482 if (_jmethod_id == NULL) { |
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1483 // Cache the jmethod_id since it can no longer be looked up once the |
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1484 // method itself has been marked for unloading. |
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1485 _jmethod_id = method()->jmethod_id(); |
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|
1486 } |
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|
1487 return _jmethod_id; |
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|
1488 } |
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|
1489 |
0 | 1490 void nmethod::post_compiled_method_unload() { |
1577
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1491 if (unload_reported()) { |
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1492 // During unloading we transition to unloaded and then to zombie |
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1493 // and the unloading is reported during the first transition. |
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1494 return; |
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1495 } |
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|
1496 |
0 | 1497 assert(_method != NULL && !is_unloaded(), "just checking"); |
1498 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1499 | |
1500 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1501 // post the event. Sometime later this nmethod will be made a zombie |
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1502 // by the sweeper but the methodOop will not be valid at that point. |
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1503 // If the _jmethod_id is null then no load event was ever requested |
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1504 // so don't bother posting the unload. The main reason for this is |
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1505 // that the jmethodID is a weak reference to the methodOop so if |
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1506 // it's being unloaded there's no way to look it up since the weak |
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1507 // ref will have been cleared. |
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1508 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1509 assert(!unload_reported(), "already unloaded"); |
1510 HandleMark hm; | |
1748 | 1511 JvmtiExport::post_compiled_method_unload(_jmethod_id, insts_begin()); |
0 | 1512 } |
1513 | |
1514 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1515 // any time. As the nmethod is being unloaded now we mark it has | |
1516 // having the unload event reported - this will ensure that we don't | |
1517 // attempt to report the event in the unlikely scenario where the | |
1518 // event is enabled at the time the nmethod is made a zombie. | |
1519 set_unload_reported(); | |
1520 } | |
1521 | |
1522 // This is called at the end of the strong tracing/marking phase of a | |
1523 // GC to unload an nmethod if it contains otherwise unreachable | |
1524 // oops. | |
1525 | |
1526 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1527 OopClosure* keep_alive, bool unloading_occurred) { | |
1528 // Make sure the oop's ready to receive visitors | |
1529 assert(!is_zombie() && !is_unloaded(), | |
1530 "should not call follow on zombie or unloaded nmethod"); | |
1531 | |
1532 // If the method is not entrant then a JMP is plastered over the | |
1533 // first few bytes. If an oop in the old code was there, that oop | |
1534 // should not get GC'd. Skip the first few bytes of oops on | |
1535 // not-entrant methods. | |
1536 address low_boundary = verified_entry_point(); | |
1537 if (is_not_entrant()) { | |
1538 low_boundary += NativeJump::instruction_size; | |
1539 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1540 // (See comment above.) | |
1541 } | |
1542 | |
1543 // The RedefineClasses() API can cause the class unloading invariant | |
1544 // to no longer be true. See jvmtiExport.hpp for details. | |
1545 // Also, leave a debugging breadcrumb in local flag. | |
1546 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1547 if (a_class_was_redefined) { | |
1548 // This set of the unloading_occurred flag is done before the | |
1549 // call to post_compiled_method_unload() so that the unloading | |
1550 // of this nmethod is reported. | |
1551 unloading_occurred = true; | |
1552 } | |
1553 | |
1554 // Follow methodOop | |
1555 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1556 return; | |
1557 } | |
1558 | |
1559 // Exception cache | |
1560 ExceptionCache* ec = exception_cache(); | |
1561 while (ec != NULL) { | |
1562 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1563 oop ex = *ex_addr; | |
1564 ExceptionCache* next_ec = ec->next(); | |
1565 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1566 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1567 remove_from_exception_cache(ec); | |
1568 } | |
1569 ec = next_ec; | |
1570 } | |
1571 | |
1572 // If class unloading occurred we first iterate over all inline caches and | |
1573 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1574 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1575 // iteration below. | |
1576 if (unloading_occurred) { | |
1577 RelocIterator iter(this, low_boundary); | |
1578 while(iter.next()) { | |
1579 if (iter.type() == relocInfo::virtual_call_type) { | |
1580 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1581 oop ic_oop = ic->cached_oop(); | |
1582 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1583 // The only exception is compiledICHolder oops which may | |
1584 // yet be marked below. (We check this further below). | |
1585 if (ic_oop->is_compiledICHolder()) { | |
1586 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1587 if (is_alive->do_object_b( | |
1588 cichk_oop->holder_method()->method_holder()) && | |
1589 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1590 continue; | |
1591 } | |
1592 } | |
1593 ic->set_to_clean(); | |
1489
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1594 assert(ic->cached_oop() == NULL, |
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1595 "cached oop in IC should be cleared"); |
0 | 1596 } |
1597 } | |
1598 } | |
1599 } | |
1600 | |
1601 // Compiled code | |
1602 RelocIterator iter(this, low_boundary); | |
1603 while (iter.next()) { | |
1604 if (iter.type() == relocInfo::oop_type) { | |
1605 oop_Relocation* r = iter.oop_reloc(); | |
1606 // In this loop, we must only traverse those oops directly embedded in | |
1607 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1608 assert(1 == (r->oop_is_immediate()) + | |
1609 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1610 "oop must be found in exactly one place"); | |
1611 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1612 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1613 return; | |
1614 } | |
1615 } | |
1616 } | |
1617 } | |
1618 | |
1619 | |
1620 // Scopes | |
1621 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1622 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1623 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1624 return; | |
1625 } | |
1626 } | |
1627 | |
1628 #ifndef PRODUCT | |
1629 // This nmethod was not unloaded; check below that all CompiledICs | |
1630 // refer to marked oops. | |
1631 { | |
1632 RelocIterator iter(this, low_boundary); | |
1633 while (iter.next()) { | |
1634 if (iter.type() == relocInfo::virtual_call_type) { | |
1635 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1636 oop ic_oop = ic->cached_oop(); | |
1637 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1638 "Found unmarked ic_oop in reachable nmethod"); | |
1639 } | |
1640 } | |
1641 } | |
1642 #endif // !PRODUCT | |
1643 } | |
1644 | |
941 | 1645 // This method is called twice during GC -- once while |
1646 // tracing the "active" nmethods on thread stacks during | |
1647 // the (strong) marking phase, and then again when walking | |
1648 // the code cache contents during the weak roots processing | |
1649 // phase. The two uses are distinguished by means of the | |
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1650 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1651 // case. We want to walk the weak roots in the nmethod |
1652 // only in the second case. The weak roots in the nmethod | |
1653 // are the oops in the ExceptionCache and the InlineCache | |
1654 // oops. | |
994
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1655 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1656 // make sure the oops ready to receive visitors |
1657 assert(!is_zombie() && !is_unloaded(), | |
1658 "should not call follow on zombie or unloaded nmethod"); | |
1659 | |
1660 // If the method is not entrant or zombie then a JMP is plastered over the | |
1661 // first few bytes. If an oop in the old code was there, that oop | |
1662 // should not get GC'd. Skip the first few bytes of oops on | |
1663 // not-entrant methods. | |
1664 address low_boundary = verified_entry_point(); | |
1665 if (is_not_entrant()) { | |
1666 low_boundary += NativeJump::instruction_size; | |
1667 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1668 // (See comment above.) | |
1669 } | |
1670 | |
1671 // Compiled code | |
1672 f->do_oop((oop*) &_method); | |
994
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1673 if (!do_strong_roots_only) { |
941 | 1674 // weak roots processing phase -- update ExceptionCache oops |
1675 ExceptionCache* ec = exception_cache(); | |
1676 while(ec != NULL) { | |
1677 f->do_oop((oop*)ec->exception_type_addr()); | |
1678 ec = ec->next(); | |
1679 } | |
1680 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1681 |
1682 RelocIterator iter(this, low_boundary); | |
941 | 1683 |
0 | 1684 while (iter.next()) { |
1685 if (iter.type() == relocInfo::oop_type ) { | |
1686 oop_Relocation* r = iter.oop_reloc(); | |
1687 // In this loop, we must only follow those oops directly embedded in | |
1688 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1689 assert(1 == (r->oop_is_immediate()) + |
1690 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1691 "oop must be found in exactly one place"); | |
0 | 1692 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1693 f->do_oop(r->oop_addr()); | |
1694 } | |
1695 } | |
1696 } | |
1697 | |
1698 // Scopes | |
989
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1699 // This includes oop constants not inlined in the code stream. |
0 | 1700 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1701 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1702 f->do_oop(p); | |
1703 } | |
1704 } | |
1705 | |
989
148e5441d916
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|
1706 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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|
1707 |
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|
1708 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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|
1709 |
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|
1710 // An nmethod is "marked" if its _mark_link is set non-null. |
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1711 // Even if it is the end of the linked list, it will have a non-null link value, |
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1712 // as long as it is on the list. |
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1713 // This code must be MP safe, because it is used from parallel GC passes. |
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|
1714 bool nmethod::test_set_oops_do_mark() { |
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1715 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1716 nmethod* observed_mark_link = _oops_do_mark_link; |
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1717 if (observed_mark_link == NULL) { |
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|
1718 // Claim this nmethod for this thread to mark. |
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|
1719 observed_mark_link = (nmethod*) |
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|
1720 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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|
1721 if (observed_mark_link == NULL) { |
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|
1722 |
148e5441d916
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|
1723 // Atomically append this nmethod (now claimed) to the head of the list: |
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|
1724 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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|
1725 for (;;) { |
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|
1726 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1727 _oops_do_mark_link = required_mark_nmethods; |
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|
1728 observed_mark_nmethods = (nmethod*) |
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|
1729 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1730 if (observed_mark_nmethods == required_mark_nmethods) |
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|
1731 break; |
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|
1732 } |
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|
1733 // Mark was clear when we first saw this guy. |
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|
1734 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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|
1735 return false; |
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|
1736 } |
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|
1737 } |
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|
1738 // On fall through, another racing thread marked this nmethod before we did. |
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|
1739 return true; |
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|
1740 } |
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|
1741 |
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|
1742 void nmethod::oops_do_marking_prologue() { |
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|
1743 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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|
1744 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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|
1745 // We use cmpxchg_ptr instead of regular assignment here because the user |
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|
1746 // may fork a bunch of threads, and we need them all to see the same state. |
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|
1747 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1748 guarantee(observed == NULL, "no races in this sequential code"); |
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1749 } |
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1750 |
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1751 void nmethod::oops_do_marking_epilogue() { |
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1752 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1753 nmethod* cur = _oops_do_mark_nmethods; |
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1754 while (cur != NMETHOD_SENTINEL) { |
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1755 assert(cur != NULL, "not NULL-terminated"); |
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1756 nmethod* next = cur->_oops_do_mark_link; |
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1757 cur->_oops_do_mark_link = NULL; |
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1758 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1759 cur = next; |
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1760 } |
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1761 void* required = _oops_do_mark_nmethods; |
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1762 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1763 guarantee(observed == required, "no races in this sequential code"); |
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1764 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1765 } |
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1766 |
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1767 class DetectScavengeRoot: public OopClosure { |
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1768 bool _detected_scavenge_root; |
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1769 public: |
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1770 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1771 { NOT_PRODUCT(_print_nm = NULL); } |
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1772 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1773 virtual void do_oop(oop* p) { |
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1774 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1775 NOT_PRODUCT(maybe_print(p)); |
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1776 _detected_scavenge_root = true; |
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1777 } |
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1778 } |
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1779 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1780 |
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1781 #ifndef PRODUCT |
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1782 nmethod* _print_nm; |
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1783 void maybe_print(oop* p) { |
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1784 if (_print_nm == NULL) return; |
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1785 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1786 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1787 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1788 (intptr_t)(*p), (intptr_t)p); |
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1789 (*p)->print(); |
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1790 } |
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1791 #endif //PRODUCT |
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1792 }; |
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1793 |
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1794 bool nmethod::detect_scavenge_root_oops() { |
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1795 DetectScavengeRoot detect_scavenge_root; |
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1796 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1797 oops_do(&detect_scavenge_root); |
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1798 return detect_scavenge_root.detected_scavenge_root(); |
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1799 } |
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1800 |
0 | 1801 // Method that knows how to preserve outgoing arguments at call. This method must be |
1802 // called with a frame corresponding to a Java invoke | |
1803 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1804 #ifndef SHARK |
0 | 1805 if (!method()->is_native()) { |
1806 SimpleScopeDesc ssd(this, fr.pc()); | |
1807 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); | |
1138
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1808 bool has_receiver = call->has_receiver(); |
0 | 1809 symbolOop signature = call->signature(); |
1138
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1810 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1811 } |
1692 | 1812 #endif // !SHARK |
0 | 1813 } |
1814 | |
1815 | |
1816 oop nmethod::embeddedOop_at(u_char* p) { | |
1817 RelocIterator iter(this, p, p + oopSize); | |
1818 while (iter.next()) | |
1819 if (iter.type() == relocInfo::oop_type) { | |
1820 return iter.oop_reloc()->oop_value(); | |
1821 } | |
1822 return NULL; | |
1823 } | |
1824 | |
1825 | |
1826 inline bool includes(void* p, void* from, void* to) { | |
1827 return from <= p && p < to; | |
1828 } | |
1829 | |
1830 | |
1831 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1832 assert(count >= 2, "must be sentinel values, at least"); | |
1833 | |
1834 #ifdef ASSERT | |
1835 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1836 int prev_offset = pcs[0].pc_offset(); | |
1837 assert(prev_offset == PcDesc::lower_offset_limit, | |
1838 "must start with a sentinel"); | |
1839 for (int i = 1; i < count; i++) { | |
1840 int this_offset = pcs[i].pc_offset(); | |
1841 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1842 prev_offset = this_offset; | |
1843 } | |
1844 assert(prev_offset == PcDesc::upper_offset_limit, | |
1845 "must end with a sentinel"); | |
1846 #endif //ASSERT | |
1847 | |
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1848 // Search for MethodHandle invokes and tag the nmethod. |
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1849 for (int i = 0; i < count; i++) { |
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1850 if (pcs[i].is_method_handle_invoke()) { |
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1851 set_has_method_handle_invokes(true); |
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1852 break; |
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1853 } |
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1854 } |
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1855 |
0 | 1856 int size = count * sizeof(PcDesc); |
1857 assert(scopes_pcs_size() >= size, "oob"); | |
1858 memcpy(scopes_pcs_begin(), pcs, size); | |
1859 | |
1860 // Adjust the final sentinel downward. | |
1861 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1862 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1863 last_pc->set_pc_offset(content_size() + 1); |
0 | 1864 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1865 // Fill any rounding gaps with copies of the last record. | |
1866 last_pc[1] = last_pc[0]; | |
1867 } | |
1868 // The following assert could fail if sizeof(PcDesc) is not | |
1869 // an integral multiple of oopSize (the rounding term). | |
1870 // If it fails, change the logic to always allocate a multiple | |
1871 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1872 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1873 } | |
1874 | |
1875 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1876 assert(scopes_data_size() >= size, "oob"); | |
1877 memcpy(scopes_data_begin(), buffer, size); | |
1878 } | |
1879 | |
1880 | |
1881 #ifdef ASSERT | |
1882 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1883 PcDesc* lower = nm->scopes_pcs_begin(); | |
1884 PcDesc* upper = nm->scopes_pcs_end(); | |
1885 lower += 1; // exclude initial sentinel | |
1886 PcDesc* res = NULL; | |
1887 for (PcDesc* p = lower; p < upper; p++) { | |
1888 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1889 if (match_desc(p, pc_offset, approximate)) { | |
1890 if (res == NULL) | |
1891 res = p; | |
1892 else | |
1893 res = (PcDesc*) badAddress; | |
1894 } | |
1895 } | |
1896 return res; | |
1897 } | |
1898 #endif | |
1899 | |
1900 | |
1901 // Finds a PcDesc with real-pc equal to "pc" | |
1902 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1903 address base_address = code_begin(); |
0 | 1904 if ((pc < base_address) || |
1905 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1906 return NULL; // PC is wildly out of range | |
1907 } | |
1908 int pc_offset = (int) (pc - base_address); | |
1909 | |
1910 // Check the PcDesc cache if it contains the desired PcDesc | |
1911 // (This as an almost 100% hit rate.) | |
1912 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1913 if (res != NULL) { | |
1914 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1915 return res; | |
1916 } | |
1917 | |
1918 // Fallback algorithm: quasi-linear search for the PcDesc | |
1919 // Find the last pc_offset less than the given offset. | |
1920 // The successor must be the required match, if there is a match at all. | |
1921 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1922 PcDesc* lower = scopes_pcs_begin(); | |
1923 PcDesc* upper = scopes_pcs_end(); | |
1924 upper -= 1; // exclude final sentinel | |
1925 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1926 | |
1927 #define assert_LU_OK \ | |
1928 /* invariant on lower..upper during the following search: */ \ | |
1929 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1930 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1931 assert_LU_OK; | |
1932 | |
1933 // Use the last successful return as a split point. | |
1934 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
1935 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1936 if (mid->pc_offset() < pc_offset) { | |
1937 lower = mid; | |
1938 } else { | |
1939 upper = mid; | |
1940 } | |
1941 | |
1942 // Take giant steps at first (4096, then 256, then 16, then 1) | |
1943 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
1944 const int RADIX = (1 << LOG2_RADIX); | |
1945 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
1946 while ((mid = lower + step) < upper) { | |
1947 assert_LU_OK; | |
1948 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1949 if (mid->pc_offset() < pc_offset) { | |
1950 lower = mid; | |
1951 } else { | |
1952 upper = mid; | |
1953 break; | |
1954 } | |
1955 } | |
1956 assert_LU_OK; | |
1957 } | |
1958 | |
1959 // Sneak up on the value with a linear search of length ~16. | |
1960 while (true) { | |
1961 assert_LU_OK; | |
1962 mid = lower + 1; | |
1963 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1964 if (mid->pc_offset() < pc_offset) { | |
1965 lower = mid; | |
1966 } else { | |
1967 upper = mid; | |
1968 break; | |
1969 } | |
1970 } | |
1971 #undef assert_LU_OK | |
1972 | |
1973 if (match_desc(upper, pc_offset, approximate)) { | |
1974 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
1975 _pc_desc_cache.add_pc_desc(upper); | |
1976 return upper; | |
1977 } else { | |
1978 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
1979 return NULL; | |
1980 } | |
1981 } | |
1982 | |
1983 | |
1984 bool nmethod::check_all_dependencies() { | |
1985 bool found_check = false; | |
1986 // wholesale check of all dependencies | |
1987 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1988 if (deps.check_dependency() != NULL) { | |
1989 found_check = true; | |
1990 NOT_DEBUG(break); | |
1991 } | |
1992 } | |
1993 return found_check; // tell caller if we found anything | |
1994 } | |
1995 | |
1996 bool nmethod::check_dependency_on(DepChange& changes) { | |
1997 // What has happened: | |
1998 // 1) a new class dependee has been added | |
1999 // 2) dependee and all its super classes have been marked | |
2000 bool found_check = false; // set true if we are upset | |
2001 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2002 // Evaluate only relevant dependencies. | |
2003 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2004 found_check = true; | |
2005 NOT_DEBUG(break); | |
2006 } | |
2007 } | |
2008 return found_check; | |
2009 } | |
2010 | |
2011 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2012 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2013 objArrayOop dependee_methods = dependee_ik->methods(); | |
2014 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2015 if (deps.type() == Dependencies::evol_method) { | |
2016 methodOop method = deps.method_argument(0); | |
2017 for (int j = 0; j < dependee_methods->length(); j++) { | |
2018 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2019 // RC_TRACE macro has an embedded ResourceMark | |
2020 RC_TRACE(0x01000000, | |
2021 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2022 _method->method_holder()->klass_part()->external_name(), | |
2023 _method->name()->as_C_string(), | |
2024 _method->signature()->as_C_string(), compile_id(), | |
2025 method->method_holder()->klass_part()->external_name(), | |
2026 method->name()->as_C_string(), | |
2027 method->signature()->as_C_string())); | |
2028 if (TraceDependencies || LogCompilation) | |
2029 deps.log_dependency(dependee); | |
2030 return true; | |
2031 } | |
2032 } | |
2033 } | |
2034 } | |
2035 return false; | |
2036 } | |
2037 | |
2038 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2039 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2040 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2041 if (deps.type() != Dependencies::evol_method) | |
2042 continue; | |
2043 methodOop method = deps.method_argument(0); | |
2044 if (method == dependee) return true; | |
2045 } | |
2046 return false; | |
2047 } | |
2048 | |
2049 | |
2050 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2051 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2052 if (is_zombie()) { |
2053 // a zombie may never be patched | |
2054 return false; | |
2055 } | |
2056 return true; | |
2057 } | |
2058 | |
2059 | |
2060 address nmethod::continuation_for_implicit_exception(address pc) { | |
2061 // Exception happened outside inline-cache check code => we are inside | |
2062 // an active nmethod => use cpc to determine a return address | |
1748 | 2063 int exception_offset = pc - code_begin(); |
0 | 2064 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2065 #ifdef ASSERT | |
2066 if (cont_offset == 0) { | |
2067 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2068 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2069 HandleMark hm(thread); | |
2070 ResourceMark rm(thread); | |
2071 CodeBlob* cb = CodeCache::find_blob(pc); | |
2072 assert(cb != NULL && cb == this, ""); | |
2073 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2074 print(); | |
2075 method()->print_codes(); | |
2076 print_code(); | |
2077 print_pcs(); | |
2078 } | |
2079 #endif | |
1250 | 2080 if (cont_offset == 0) { |
2081 // Let the normal error handling report the exception | |
2082 return NULL; | |
2083 } | |
1748 | 2084 return code_begin() + cont_offset; |
0 | 2085 } |
2086 | |
2087 | |
2088 | |
2089 void nmethod_init() { | |
2090 // make sure you didn't forget to adjust the filler fields | |
2091 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2092 } | |
2093 | |
2094 | |
2095 //------------------------------------------------------------------------------------------- | |
2096 | |
2097 | |
2098 // QQQ might we make this work from a frame?? | |
2099 nmethodLocker::nmethodLocker(address pc) { | |
2100 CodeBlob* cb = CodeCache::find_blob(pc); | |
2101 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2102 _nm = (nmethod*)cb; | |
2103 lock_nmethod(_nm); | |
2104 } | |
2105 | |
2106 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
2107 if (nm == NULL) return; | |
2108 Atomic::inc(&nm->_lock_count); | |
2109 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
2110 } | |
2111 | |
2112 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2113 if (nm == NULL) return; | |
2114 Atomic::dec(&nm->_lock_count); | |
2115 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2116 } | |
2117 | |
1204 | 2118 |
2119 // ----------------------------------------------------------------------------- | |
2120 // nmethod::get_deopt_original_pc | |
2121 // | |
2122 // Return the original PC for the given PC if: | |
2123 // (a) the given PC belongs to a nmethod and | |
2124 // (b) it is a deopt PC | |
2125 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2126 if (fr->cb() == NULL) return NULL; | |
2127 | |
2128 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2129 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2130 return nm->get_original_pc(fr); | |
2131 | |
2132 return NULL; | |
0 | 2133 } |
2134 | |
2135 | |
2136 // ----------------------------------------------------------------------------- | |
1135
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2137 // MethodHandle |
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2138 |
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2139 bool nmethod::is_method_handle_return(address return_pc) { |
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2140 if (!has_method_handle_invokes()) return false; |
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2141 PcDesc* pd = pc_desc_at(return_pc); |
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2142 if (pd == NULL) |
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2143 return false; |
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2144 return pd->is_method_handle_invoke(); |
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2145 } |
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2146 |
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2147 |
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2148 // ----------------------------------------------------------------------------- |
0 | 2149 // Verification |
2150 | |
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2151 class VerifyOopsClosure: public OopClosure { |
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2152 nmethod* _nm; |
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2153 bool _ok; |
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2154 public: |
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2155 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2156 bool ok() { return _ok; } |
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2157 virtual void do_oop(oop* p) { |
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2158 if ((*p) == NULL || (*p)->is_oop()) return; |
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2159 if (_ok) { |
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2160 _nm->print_nmethod(true); |
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2161 _ok = false; |
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2162 } |
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2163 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2164 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2165 } |
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2166 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2167 }; |
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2168 |
0 | 2169 void nmethod::verify() { |
2170 | |
2171 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2172 // seems odd. | |
2173 | |
2174 if( is_zombie() || is_not_entrant() ) | |
2175 return; | |
2176 | |
2177 // Make sure all the entry points are correctly aligned for patching. | |
2178 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2179 | |
2180 assert(method()->is_oop(), "must be valid"); | |
2181 | |
2182 ResourceMark rm; | |
2183 | |
2184 if (!CodeCache::contains(this)) { | |
1490
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2185 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2186 } |
2187 | |
2188 if(is_native_method() ) | |
2189 return; | |
2190 | |
2191 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2192 if (nm != this) { | |
1490
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2193 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2194 this)); |
0 | 2195 } |
2196 | |
2197 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2198 if (! p->verify(this)) { | |
2199 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2200 } | |
2201 } | |
2202 | |
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2203 VerifyOopsClosure voc(this); |
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2204 oops_do(&voc); |
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2205 assert(voc.ok(), "embedded oops must be OK"); |
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2206 verify_scavenge_root_oops(); |
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2207 |
0 | 2208 verify_scopes(); |
2209 } | |
2210 | |
2211 | |
2212 void nmethod::verify_interrupt_point(address call_site) { | |
2213 // This code does not work in release mode since | |
2214 // owns_lock only is available in debug mode. | |
2215 CompiledIC* ic = NULL; | |
2216 Thread *cur = Thread::current(); | |
2217 if (CompiledIC_lock->owner() == cur || | |
2218 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2219 SafepointSynchronize::is_at_safepoint())) { | |
2220 ic = CompiledIC_at(call_site); | |
2221 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2222 } else { | |
2223 MutexLocker ml_verify (CompiledIC_lock); | |
2224 ic = CompiledIC_at(call_site); | |
2225 } | |
2226 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2227 assert(pd != NULL, "PcDesc must exist"); | |
2228 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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2229 pd->obj_decode_offset(), pd->should_reexecute(), |
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2230 pd->return_oop()); |
0 | 2231 !sd->is_top(); sd = sd->sender()) { |
2232 sd->verify(); | |
2233 } | |
2234 } | |
2235 | |
2236 void nmethod::verify_scopes() { | |
2237 if( !method() ) return; // Runtime stubs have no scope | |
2238 if (method()->is_native()) return; // Ignore stub methods. | |
2239 // iterate through all interrupt point | |
2240 // and verify the debug information is valid. | |
2241 RelocIterator iter((nmethod*)this); | |
2242 while (iter.next()) { | |
2243 address stub = NULL; | |
2244 switch (iter.type()) { | |
2245 case relocInfo::virtual_call_type: | |
2246 verify_interrupt_point(iter.addr()); | |
2247 break; | |
2248 case relocInfo::opt_virtual_call_type: | |
2249 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2250 verify_interrupt_point(iter.addr()); | |
2251 break; | |
2252 case relocInfo::static_call_type: | |
2253 stub = iter.static_call_reloc()->static_stub(); | |
2254 //verify_interrupt_point(iter.addr()); | |
2255 break; | |
2256 case relocInfo::runtime_call_type: | |
2257 address destination = iter.reloc()->value(); | |
2258 // Right now there is no way to find out which entries support | |
2259 // an interrupt point. It would be nice if we had this | |
2260 // information in a table. | |
2261 break; | |
2262 } | |
2263 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2264 } | |
2265 } | |
2266 | |
2267 | |
2268 // ----------------------------------------------------------------------------- | |
2269 // Non-product code | |
2270 #ifndef PRODUCT | |
2271 | |
989
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2272 class DebugScavengeRoot: public OopClosure { |
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2273 nmethod* _nm; |
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2274 bool _ok; |
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2275 public: |
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2276 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2277 bool ok() { return _ok; } |
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2278 virtual void do_oop(oop* p) { |
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2279 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2280 if (_ok) { |
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2281 _nm->print_nmethod(true); |
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2282 _ok = false; |
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2283 } |
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2284 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2285 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2286 (*p)->print(); |
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|
2287 } |
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2288 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2289 }; |
0 | 2290 |
989
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2291 void nmethod::verify_scavenge_root_oops() { |
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2292 if (!on_scavenge_root_list()) { |
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2293 // Actually look inside, to verify the claim that it's clean. |
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2294 DebugScavengeRoot debug_scavenge_root(this); |
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2295 oops_do(&debug_scavenge_root); |
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2296 if (!debug_scavenge_root.ok()) |
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2297 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2298 } |
989
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2299 assert(scavenge_root_not_marked(), ""); |
0 | 2300 } |
2301 | |
100
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2302 #endif // PRODUCT |
0 | 2303 |
2304 // Printing operations | |
2305 | |
2306 void nmethod::print() const { | |
2307 ResourceMark rm; | |
2308 ttyLocker ttyl; // keep the following output all in one block | |
2309 | |
2310 tty->print("Compiled "); | |
2311 | |
2312 if (is_compiled_by_c1()) { | |
2313 tty->print("(c1) "); | |
2314 } else if (is_compiled_by_c2()) { | |
2315 tty->print("(c2) "); | |
1692 | 2316 } else if (is_compiled_by_shark()) { |
2317 tty->print("(shark) "); | |
0 | 2318 } else { |
2319 tty->print("(nm) "); | |
2320 } | |
2321 | |
2322 print_on(tty, "nmethod"); | |
2323 tty->cr(); | |
2324 if (WizardMode) { | |
2325 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2326 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2327 tty->print(" { "); | |
2328 if (is_in_use()) tty->print("in_use "); | |
2329 if (is_not_entrant()) tty->print("not_entrant "); | |
2330 if (is_zombie()) tty->print("zombie "); | |
2331 if (is_unloaded()) tty->print("unloaded "); | |
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2332 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2333 tty->print_cr("}:"); |
2334 } | |
2335 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2336 (address)this, | |
2337 (address)this + size(), | |
2338 size()); | |
2339 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2340 relocation_begin(), | |
2341 relocation_end(), | |
2342 relocation_size()); | |
1762
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2343 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2344 consts_begin(), |
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|
2345 consts_end(), |
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2346 consts_size()); |
1748 | 2347 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2348 insts_begin(), | |
2349 insts_end(), | |
2350 insts_size()); | |
0 | 2351 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2352 stub_begin(), | |
2353 stub_end(), | |
2354 stub_size()); | |
1563
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2355 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2356 oops_begin(), |
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|
2357 oops_end(), |
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|
2358 oops_size()); |
0 | 2359 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2360 scopes_data_begin(), | |
2361 scopes_data_end(), | |
2362 scopes_data_size()); | |
2363 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2364 scopes_pcs_begin(), | |
2365 scopes_pcs_end(), | |
2366 scopes_pcs_size()); | |
2367 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2368 dependencies_begin(), | |
2369 dependencies_end(), | |
2370 dependencies_size()); | |
2371 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2372 handler_table_begin(), | |
2373 handler_table_end(), | |
2374 handler_table_size()); | |
2375 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2376 nul_chk_table_begin(), | |
2377 nul_chk_table_end(), | |
2378 nul_chk_table_size()); | |
2379 } | |
2380 | |
100
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diff
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|
2381 void nmethod::print_code() { |
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diff
changeset
|
2382 HandleMark hm; |
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diff
changeset
|
2383 ResourceMark m; |
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diff
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|
2384 Disassembler::decode(this); |
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6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2385 } |
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diff
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|
2386 |
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|
2387 |
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|
2388 #ifndef PRODUCT |
0 | 2389 |
2390 void nmethod::print_scopes() { | |
2391 // Find the first pc desc for all scopes in the code and print it. | |
2392 ResourceMark rm; | |
2393 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2394 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2395 continue; | |
2396 | |
2397 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2398 sd->print_on(tty, p); | |
2399 } | |
2400 } | |
2401 | |
2402 void nmethod::print_dependencies() { | |
2403 ResourceMark rm; | |
2404 ttyLocker ttyl; // keep the following output all in one block | |
2405 tty->print_cr("Dependencies:"); | |
2406 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2407 deps.print_dependency(); | |
2408 klassOop ctxk = deps.context_type(); | |
2409 if (ctxk != NULL) { | |
2410 Klass* k = Klass::cast(ctxk); | |
2411 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2412 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2413 } |
2414 } | |
2415 deps.log_dependency(); // put it into the xml log also | |
2416 } | |
2417 } | |
2418 | |
2419 | |
2420 void nmethod::print_relocations() { | |
2421 ResourceMark m; // in case methods get printed via the debugger | |
2422 tty->print_cr("relocations:"); | |
2423 RelocIterator iter(this); | |
2424 iter.print(); | |
2425 if (UseRelocIndex) { | |
2426 jint* index_end = (jint*)relocation_end() - 1; | |
2427 jint index_size = *index_end; | |
2428 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2429 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2430 if (index_size > 0) { | |
2431 jint* ip; | |
2432 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2433 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2434 ip[0], | |
2435 ip[1], | |
2436 header_end()+ip[0], | |
2437 relocation_begin()-1+ip[1]); | |
2438 for (; ip < index_end; ip++) | |
2439 tty->print_cr(" (%d ?)", ip[0]); | |
2440 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2441 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2442 } | |
2443 } | |
2444 } | |
2445 | |
2446 | |
2447 void nmethod::print_pcs() { | |
2448 ResourceMark m; // in case methods get printed via debugger | |
2449 tty->print_cr("pc-bytecode offsets:"); | |
2450 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2451 p->print(this); | |
2452 } | |
2453 } | |
2454 | |
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2455 #endif // PRODUCT |
0 | 2456 |
2457 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2458 RelocIterator iter(this, begin, end); | |
2459 bool have_one = false; | |
2460 while (iter.next()) { | |
2461 have_one = true; | |
2462 switch (iter.type()) { | |
2463 case relocInfo::none: return "no_reloc"; | |
2464 case relocInfo::oop_type: { | |
2465 stringStream st; | |
2466 oop_Relocation* r = iter.oop_reloc(); | |
2467 oop obj = r->oop_value(); | |
2468 st.print("oop("); | |
2469 if (obj == NULL) st.print("NULL"); | |
2470 else obj->print_value_on(&st); | |
2471 st.print(")"); | |
2472 return st.as_string(); | |
2473 } | |
2474 case relocInfo::virtual_call_type: return "virtual_call"; | |
2475 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2476 case relocInfo::static_call_type: return "static_call"; | |
2477 case relocInfo::static_stub_type: return "static_stub"; | |
2478 case relocInfo::runtime_call_type: return "runtime_call"; | |
2479 case relocInfo::external_word_type: return "external_word"; | |
2480 case relocInfo::internal_word_type: return "internal_word"; | |
2481 case relocInfo::section_word_type: return "section_word"; | |
2482 case relocInfo::poll_type: return "poll"; | |
2483 case relocInfo::poll_return_type: return "poll_return"; | |
2484 case relocInfo::type_mask: return "type_bit_mask"; | |
2485 } | |
2486 } | |
2487 return have_one ? "other" : NULL; | |
2488 } | |
2489 | |
2490 // Return a the last scope in (begin..end] | |
2491 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2492 PcDesc* p = pc_desc_near(begin+1); | |
2493 if (p != NULL && p->real_pc(this) <= end) { | |
2494 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
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|
2495 p->obj_decode_offset(), p->should_reexecute(), |
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2496 p->return_oop()); |
0 | 2497 } |
2498 return NULL; | |
2499 } | |
2500 | |
1155
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|
2501 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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|
2502 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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|
2503 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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|
2504 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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diff
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|
2505 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2506 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2507 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2508 if (has_method_handle_invokes()) |
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6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2509 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2510 |
1155
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diff
changeset
|
2511 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
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diff
changeset
|
2512 |
1155
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2513 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2514 methodHandle m = method(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2515 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2516 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2517 m->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2518 stream->cr(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2519 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2520 if (m.not_null() && !is_osr_method()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2521 ResourceMark rm; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2522 int sizeargs = m->size_of_parameters(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2523 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2524 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2525 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2526 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2527 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2528 sig_bt[sig_index++] = T_OBJECT; // 'this' |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2529 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2530 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2531 sig_bt[sig_index++] = t; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2532 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2533 sig_bt[sig_index++] = T_VOID; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2534 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2535 assert(type2size[t] == 1, "size is 1 or 2"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2536 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2537 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2538 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2539 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2540 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2541 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2542 int stack_slot_offset = this->frame_size() * wordSize; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2543 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2544 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2545 int arg_index = (m->is_static() ? 0 : -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2546 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2547 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2548 bool at_this = (arg_index == -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2549 bool at_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2550 BasicType t = (at_this ? T_OBJECT : ss.type()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2551 assert(t == sig_bt[sig_index], "sigs in sync"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2552 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2553 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2554 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2555 stream->print(" # parm%d: ", arg_index); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2556 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2557 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2558 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2559 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2560 stream->print("%s", fst->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2561 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2562 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2563 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2564 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2565 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2566 if (offset == stack_slot_offset) at_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2567 stream->print("[%s+0x%x]", spname, offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2568 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2569 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2570 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2571 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2572 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2573 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2574 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2575 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2576 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2577 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2578 if (!at_this && ss.is_object()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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2579 symbolOop name = ss.as_symbol_or_null(); |
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2580 if (name != NULL) { |
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2581 name->print_value_on(stream); |
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2582 did_name = true; |
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2583 } |
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2584 } |
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2585 if (!did_name) |
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2586 stream->print("%s", type2name(t)); |
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2587 } |
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2588 if (at_old_sp) { |
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2589 stream->print(" (%s of caller)", spname); |
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2590 did_old_sp = true; |
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2591 } |
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2592 stream->cr(); |
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2593 sig_index += type2size[t]; |
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2594 arg_index += 1; |
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2595 if (!at_this) ss.next(); |
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2596 } |
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2597 if (!did_old_sp) { |
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2598 stream->print(" # "); |
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2599 stream->move_to(tab1); |
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2600 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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2601 stream->print(" (%s of caller)", spname); |
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2602 stream->cr(); |
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2603 } |
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2604 } |
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2605 } |
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2606 } |
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2607 |
0 | 2608 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2609 // First, find an oopmap in (begin, end]. | |
2610 // We use the odd half-closed interval so that oop maps and scope descs | |
2611 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2612 address base = code_begin(); |
0 | 2613 OopMapSet* oms = oop_maps(); |
2614 if (oms != NULL) { | |
2615 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2616 OopMap* om = oms->at(i); | |
2617 address pc = base + om->offset(); | |
2618 if (pc > begin) { | |
2619 if (pc <= end) { | |
100
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2620 st->move_to(column); |
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2621 st->print("; "); |
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2622 om->print_on(st); |
0 | 2623 } |
2624 break; | |
2625 } | |
2626 } | |
2627 } | |
100
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2628 |
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2629 // Print any debug info present at this pc. |
0 | 2630 ScopeDesc* sd = scope_desc_in(begin, end); |
2631 if (sd != NULL) { | |
100
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2632 st->move_to(column); |
0 | 2633 if (sd->bci() == SynchronizationEntryBCI) { |
2634 st->print(";*synchronization entry"); | |
2635 } else { | |
2636 if (sd->method().is_null()) { | |
100
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2637 st->print("method is NULL"); |
0 | 2638 } else if (sd->method()->is_native()) { |
100
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2639 st->print("method is native"); |
0 | 2640 } else { |
2641 address bcp = sd->method()->bcp_from(sd->bci()); | |
2642 Bytecodes::Code bc = Bytecodes::java_code_at(bcp); | |
2643 st->print(";*%s", Bytecodes::name(bc)); | |
2644 switch (bc) { | |
2645 case Bytecodes::_invokevirtual: | |
2646 case Bytecodes::_invokespecial: | |
2647 case Bytecodes::_invokestatic: | |
2648 case Bytecodes::_invokeinterface: | |
2649 { | |
2650 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); | |
2651 st->print(" "); | |
2652 if (invoke->name() != NULL) | |
2653 invoke->name()->print_symbol_on(st); | |
2654 else | |
2655 st->print("<UNKNOWN>"); | |
2656 break; | |
2657 } | |
2658 case Bytecodes::_getfield: | |
2659 case Bytecodes::_putfield: | |
2660 case Bytecodes::_getstatic: | |
2661 case Bytecodes::_putstatic: | |
2662 { | |
1602 | 2663 Bytecode_field* field = Bytecode_field_at(sd->method(), sd->bci()); |
0 | 2664 st->print(" "); |
1602 | 2665 if (field->name() != NULL) |
2666 field->name()->print_symbol_on(st); | |
0 | 2667 else |
2668 st->print("<UNKNOWN>"); | |
2669 } | |
2670 } | |
2671 } | |
2672 } | |
100
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2673 |
0 | 2674 // Print all scopes |
2675 for (;sd != NULL; sd = sd->sender()) { | |
100
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2676 st->move_to(column); |
0 | 2677 st->print("; -"); |
2678 if (sd->method().is_null()) { | |
100
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|
2679 st->print("method is NULL"); |
0 | 2680 } else { |
2681 sd->method()->print_short_name(st); | |
2682 } | |
2683 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2684 if (lineno != -1) { | |
2685 st->print("@%d (line %d)", sd->bci(), lineno); | |
2686 } else { | |
2687 st->print("@%d", sd->bci()); | |
2688 } | |
2689 st->cr(); | |
2690 } | |
2691 } | |
2692 | |
2693 // Print relocation information | |
2694 const char* str = reloc_string_for(begin, end); | |
2695 if (str != NULL) { | |
2696 if (sd != NULL) st->cr(); | |
100
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2697 st->move_to(column); |
0 | 2698 st->print("; {%s}", str); |
2699 } | |
1748 | 2700 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2701 if (cont_offset != 0) { |
100
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2702 st->move_to(column); |
1748 | 2703 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2704 } |
2705 | |
2706 } | |
2707 | |
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|
2708 #ifndef PRODUCT |
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|
2709 |
0 | 2710 void nmethod::print_value_on(outputStream* st) const { |
2711 print_on(st, "nmethod"); | |
2712 } | |
2713 | |
2714 void nmethod::print_calls(outputStream* st) { | |
2715 RelocIterator iter(this); | |
2716 while (iter.next()) { | |
2717 switch (iter.type()) { | |
2718 case relocInfo::virtual_call_type: | |
2719 case relocInfo::opt_virtual_call_type: { | |
2720 VerifyMutexLocker mc(CompiledIC_lock); | |
2721 CompiledIC_at(iter.reloc())->print(); | |
2722 break; | |
2723 } | |
2724 case relocInfo::static_call_type: | |
2725 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2726 compiledStaticCall_at(iter.reloc())->print(); | |
2727 break; | |
2728 } | |
2729 } | |
2730 } | |
2731 | |
2732 void nmethod::print_handler_table() { | |
2733 ExceptionHandlerTable(this).print(); | |
2734 } | |
2735 | |
2736 void nmethod::print_nul_chk_table() { | |
1748 | 2737 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2738 } |
2739 | |
2740 void nmethod::print_statistics() { | |
2741 ttyLocker ttyl; | |
2742 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2743 nmethod_stats.print_native_nmethod_stats(); | |
2744 nmethod_stats.print_nmethod_stats(); | |
2745 DebugInformationRecorder::print_statistics(); | |
2746 nmethod_stats.print_pc_stats(); | |
2747 Dependencies::print_statistics(); | |
2748 if (xtty != NULL) xtty->tail("statistics"); | |
2749 } | |
2750 | |
2751 #endif // PRODUCT |