Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 1616:38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
Reviewed-by: dcubed, kvn, twisti
author | never |
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date | Mon, 21 Jun 2010 14:26:17 -0700 |
parents | 136b78722a08 |
children | 2a47bd84841f |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_nmethod.cpp.incl" | |
27 | |
28 #ifdef DTRACE_ENABLED | |
29 | |
30 // Only bother with this argument setup if dtrace is available | |
31 | |
32 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
33 const char*, int, const char*, int, const char*, int, void*, size_t); | |
34 | |
35 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
36 char*, int, char*, int, char*, int); | |
37 | |
38 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
39 { \ | |
40 methodOop m = (method); \ | |
41 if (m != NULL) { \ | |
42 symbolOop klass_name = m->klass_name(); \ | |
43 symbolOop name = m->name(); \ | |
44 symbolOop signature = m->signature(); \ | |
45 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ | |
46 klass_name->bytes(), klass_name->utf8_length(), \ | |
47 name->bytes(), name->utf8_length(), \ | |
48 signature->bytes(), signature->utf8_length()); \ | |
49 } \ | |
50 } | |
51 | |
52 #else // ndef DTRACE_ENABLED | |
53 | |
54 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
55 | |
56 #endif | |
57 | |
58 bool nmethod::is_compiled_by_c1() const { | |
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59 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 60 if (is_native_method()) return false; |
61 return compiler()->is_c1(); | |
62 } | |
63 bool nmethod::is_compiled_by_c2() const { | |
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64 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 65 if (is_native_method()) return false; |
66 return compiler()->is_c2(); | |
67 } | |
68 | |
69 | |
70 | |
71 //--------------------------------------------------------------------------------- | |
72 // NMethod statistics | |
73 // They are printed under various flags, including: | |
74 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
75 // (In the latter two cases, they like other stats are printed to the log only.) | |
76 | |
77 #ifndef PRODUCT | |
78 // These variables are put into one block to reduce relocations | |
79 // and make it simpler to print from the debugger. | |
80 static | |
81 struct nmethod_stats_struct { | |
82 int nmethod_count; | |
83 int total_size; | |
84 int relocation_size; | |
85 int code_size; | |
86 int stub_size; | |
87 int consts_size; | |
88 int scopes_data_size; | |
89 int scopes_pcs_size; | |
90 int dependencies_size; | |
91 int handler_table_size; | |
92 int nul_chk_table_size; | |
93 int oops_size; | |
94 | |
95 void note_nmethod(nmethod* nm) { | |
96 nmethod_count += 1; | |
97 total_size += nm->size(); | |
98 relocation_size += nm->relocation_size(); | |
99 code_size += nm->code_size(); | |
100 stub_size += nm->stub_size(); | |
101 consts_size += nm->consts_size(); | |
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102 oops_size += nm->oops_size(); |
0 | 103 scopes_data_size += nm->scopes_data_size(); |
104 scopes_pcs_size += nm->scopes_pcs_size(); | |
105 dependencies_size += nm->dependencies_size(); | |
106 handler_table_size += nm->handler_table_size(); | |
107 nul_chk_table_size += nm->nul_chk_table_size(); | |
108 } | |
109 void print_nmethod_stats() { | |
110 if (nmethod_count == 0) return; | |
111 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
112 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
113 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
114 if (code_size != 0) tty->print_cr(" main code = %d", code_size); | |
115 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); | |
116 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); | |
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117 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 118 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
119 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
120 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
121 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
122 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
123 } | |
124 | |
125 int native_nmethod_count; | |
126 int native_total_size; | |
127 int native_relocation_size; | |
128 int native_code_size; | |
129 int native_oops_size; | |
130 void note_native_nmethod(nmethod* nm) { | |
131 native_nmethod_count += 1; | |
132 native_total_size += nm->size(); | |
133 native_relocation_size += nm->relocation_size(); | |
134 native_code_size += nm->code_size(); | |
135 native_oops_size += nm->oops_size(); | |
136 } | |
137 void print_native_nmethod_stats() { | |
138 if (native_nmethod_count == 0) return; | |
139 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
140 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
141 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
142 if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size); | |
143 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); | |
144 } | |
145 | |
146 int pc_desc_resets; // number of resets (= number of caches) | |
147 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
148 int pc_desc_approx; // number of those which have approximate true | |
149 int pc_desc_repeats; // number of _last_pc_desc hits | |
150 int pc_desc_hits; // number of LRU cache hits | |
151 int pc_desc_tests; // total number of PcDesc examinations | |
152 int pc_desc_searches; // total number of quasi-binary search steps | |
153 int pc_desc_adds; // number of LUR cache insertions | |
154 | |
155 void print_pc_stats() { | |
156 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
157 pc_desc_queries, | |
158 (double)(pc_desc_tests + pc_desc_searches) | |
159 / pc_desc_queries); | |
160 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
161 pc_desc_resets, | |
162 pc_desc_queries, pc_desc_approx, | |
163 pc_desc_repeats, pc_desc_hits, | |
164 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
165 } | |
166 } nmethod_stats; | |
167 #endif //PRODUCT | |
168 | |
169 //--------------------------------------------------------------------------------- | |
170 | |
171 | |
172 // The _unwind_handler is a special marker address, which says that | |
173 // for given exception oop and address, the frame should be removed | |
174 // as the tuple cannot be caught in the nmethod | |
175 address ExceptionCache::_unwind_handler = (address) -1; | |
176 | |
177 | |
178 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
179 assert(pc != NULL, "Must be non null"); | |
180 assert(exception.not_null(), "Must be non null"); | |
181 assert(handler != NULL, "Must be non null"); | |
182 | |
183 _count = 0; | |
184 _exception_type = exception->klass(); | |
185 _next = NULL; | |
186 | |
187 add_address_and_handler(pc,handler); | |
188 } | |
189 | |
190 | |
191 address ExceptionCache::match(Handle exception, address pc) { | |
192 assert(pc != NULL,"Must be non null"); | |
193 assert(exception.not_null(),"Must be non null"); | |
194 if (exception->klass() == exception_type()) { | |
195 return (test_address(pc)); | |
196 } | |
197 | |
198 return NULL; | |
199 } | |
200 | |
201 | |
202 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
203 assert(exception.not_null(),"Must be non null"); | |
204 if (exception->klass() == exception_type() && count() < cache_size) { | |
205 return true; | |
206 } | |
207 return false; | |
208 } | |
209 | |
210 | |
211 address ExceptionCache::test_address(address addr) { | |
212 for (int i=0; i<count(); i++) { | |
213 if (pc_at(i) == addr) { | |
214 return handler_at(i); | |
215 } | |
216 } | |
217 return NULL; | |
218 } | |
219 | |
220 | |
221 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
222 if (test_address(addr) == handler) return true; | |
223 if (count() < cache_size) { | |
224 set_pc_at(count(),addr); | |
225 set_handler_at(count(), handler); | |
226 increment_count(); | |
227 return true; | |
228 } | |
229 return false; | |
230 } | |
231 | |
232 | |
233 // private method for handling exception cache | |
234 // These methods are private, and used to manipulate the exception cache | |
235 // directly. | |
236 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
237 ExceptionCache* ec = exception_cache(); | |
238 while (ec != NULL) { | |
239 if (ec->match_exception_with_space(exception)) { | |
240 return ec; | |
241 } | |
242 ec = ec->next(); | |
243 } | |
244 return NULL; | |
245 } | |
246 | |
247 | |
248 //----------------------------------------------------------------------------- | |
249 | |
250 | |
251 // Helper used by both find_pc_desc methods. | |
252 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
253 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
254 if (!approximate) | |
255 return pc->pc_offset() == pc_offset; | |
256 else | |
257 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
258 } | |
259 | |
260 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
261 if (initial_pc_desc == NULL) { | |
262 _last_pc_desc = NULL; // native method | |
263 return; | |
264 } | |
265 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
266 // reset the cache by filling it with benign (non-null) values | |
267 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
268 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
269 for (int i = 0; i < cache_size; i++) | |
270 _pc_descs[i] = initial_pc_desc; | |
271 } | |
272 | |
273 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
274 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
275 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
276 | |
277 // In order to prevent race conditions do not load cache elements | |
278 // repeatedly, but use a local copy: | |
279 PcDesc* res; | |
280 | |
281 // Step one: Check the most recently returned value. | |
282 res = _last_pc_desc; | |
283 if (res == NULL) return NULL; // native method; no PcDescs at all | |
284 if (match_desc(res, pc_offset, approximate)) { | |
285 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
286 return res; | |
287 } | |
288 | |
289 // Step two: Check the LRU cache. | |
290 for (int i = 0; i < cache_size; i++) { | |
291 res = _pc_descs[i]; | |
292 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
293 if (match_desc(res, pc_offset, approximate)) { | |
294 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
295 _last_pc_desc = res; // record this cache hit in case of repeat | |
296 return res; | |
297 } | |
298 } | |
299 | |
300 // Report failure. | |
301 return NULL; | |
302 } | |
303 | |
304 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
305 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
306 // Update the LRU cache by shifting pc_desc forward: | |
307 for (int i = 0; i < cache_size; i++) { | |
308 PcDesc* next = _pc_descs[i]; | |
309 _pc_descs[i] = pc_desc; | |
310 pc_desc = next; | |
311 } | |
312 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
313 } | |
314 | |
315 // adjust pcs_size so that it is a multiple of both oopSize and | |
316 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
317 // of oopSize, then 2*sizeof(PcDesc) is) | |
318 static int adjust_pcs_size(int pcs_size) { | |
319 int nsize = round_to(pcs_size, oopSize); | |
320 if ((nsize % sizeof(PcDesc)) != 0) { | |
321 nsize = pcs_size + sizeof(PcDesc); | |
322 } | |
323 assert((nsize % oopSize) == 0, "correct alignment"); | |
324 return nsize; | |
325 } | |
326 | |
327 //----------------------------------------------------------------------------- | |
328 | |
329 | |
330 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
331 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
332 assert(new_entry != NULL,"Must be non null"); | |
333 assert(new_entry->next() == NULL, "Must be null"); | |
334 | |
335 if (exception_cache() != NULL) { | |
336 new_entry->set_next(exception_cache()); | |
337 } | |
338 set_exception_cache(new_entry); | |
339 } | |
340 | |
341 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
342 ExceptionCache* prev = NULL; | |
343 ExceptionCache* curr = exception_cache(); | |
344 assert(curr != NULL, "nothing to remove"); | |
345 // find the previous and next entry of ec | |
346 while (curr != ec) { | |
347 prev = curr; | |
348 curr = curr->next(); | |
349 assert(curr != NULL, "ExceptionCache not found"); | |
350 } | |
351 // now: curr == ec | |
352 ExceptionCache* next = curr->next(); | |
353 if (prev == NULL) { | |
354 set_exception_cache(next); | |
355 } else { | |
356 prev->set_next(next); | |
357 } | |
358 delete curr; | |
359 } | |
360 | |
361 | |
362 // public method for accessing the exception cache | |
363 // These are the public access methods. | |
364 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
365 // We never grab a lock to read the exception cache, so we may | |
366 // have false negatives. This is okay, as it can only happen during | |
367 // the first few exception lookups for a given nmethod. | |
368 ExceptionCache* ec = exception_cache(); | |
369 while (ec != NULL) { | |
370 address ret_val; | |
371 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
372 return ret_val; | |
373 } | |
374 ec = ec->next(); | |
375 } | |
376 return NULL; | |
377 } | |
378 | |
379 | |
380 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
381 // There are potential race conditions during exception cache updates, so we | |
382 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 383 // we don't lock during reads, it is possible to have several threads attempt |
0 | 384 // to update the cache with the same data. We need to check for already inserted |
385 // copies of the current data before adding it. | |
386 | |
387 MutexLocker ml(ExceptionCache_lock); | |
388 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
389 | |
390 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
391 target_entry = new ExceptionCache(exception,pc,handler); | |
392 add_exception_cache_entry(target_entry); | |
393 } | |
394 } | |
395 | |
396 | |
397 //-------------end of code for ExceptionCache-------------- | |
398 | |
399 | |
400 void nmFlags::clear() { | |
401 assert(sizeof(nmFlags) == sizeof(int), "using more than one word for nmFlags"); | |
402 *(jint*)this = 0; | |
403 } | |
404 | |
405 int nmethod::total_size() const { | |
406 return | |
407 code_size() + | |
408 stub_size() + | |
409 consts_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 | |
422 // %%% This variable is no longer used? | |
423 int nmethod::_zombie_instruction_size = NativeJump::instruction_size; | |
424 | |
425 | |
426 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
427 CodeBuffer *code_buffer, | |
428 int vep_offset, | |
429 int frame_complete, | |
430 int frame_size, | |
431 ByteSize basic_lock_owner_sp_offset, | |
432 ByteSize basic_lock_sp_offset, | |
433 OopMapSet* oop_maps) { | |
434 // create nmethod | |
435 nmethod* nm = NULL; | |
436 { | |
437 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
438 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
439 CodeOffsets offsets; | |
440 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
441 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
442 nm = new (native_nmethod_size) | |
443 nmethod(method(), native_nmethod_size, &offsets, | |
444 code_buffer, frame_size, | |
445 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
446 oop_maps); | |
447 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
448 if (PrintAssembly && nm != NULL) | |
449 Disassembler::decode(nm); | |
450 } | |
451 // verify nmethod | |
452 debug_only(if (nm) nm->verify();) // might block | |
453 | |
454 if (nm != NULL) { | |
455 nm->log_new_nmethod(); | |
456 } | |
457 | |
458 return nm; | |
459 } | |
460 | |
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461 #ifdef HAVE_DTRACE_H |
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462 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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463 CodeBuffer *code_buffer, |
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464 int vep_offset, |
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465 int trap_offset, |
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466 int frame_complete, |
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467 int frame_size) { |
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468 // create nmethod |
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469 nmethod* nm = NULL; |
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470 { |
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471 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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472 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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473 CodeOffsets offsets; |
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474 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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475 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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476 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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477 |
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478 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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479 |
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480 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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481 if (PrintAssembly && nm != NULL) |
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482 Disassembler::decode(nm); |
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483 } |
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484 // verify nmethod |
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485 debug_only(if (nm) nm->verify();) // might block |
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486 |
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487 if (nm != NULL) { |
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488 nm->log_new_nmethod(); |
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489 } |
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490 |
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491 return nm; |
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492 } |
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493 |
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494 #endif // def HAVE_DTRACE_H |
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495 |
0 | 496 nmethod* nmethod::new_nmethod(methodHandle method, |
497 int compile_id, | |
498 int entry_bci, | |
499 CodeOffsets* offsets, | |
500 int orig_pc_offset, | |
501 DebugInformationRecorder* debug_info, | |
502 Dependencies* dependencies, | |
503 CodeBuffer* code_buffer, int frame_size, | |
504 OopMapSet* oop_maps, | |
505 ExceptionHandlerTable* handler_table, | |
506 ImplicitExceptionTable* nul_chk_table, | |
507 AbstractCompiler* compiler, | |
508 int comp_level | |
509 ) | |
510 { | |
511 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
512 // create nmethod | |
513 nmethod* nm = NULL; | |
514 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
515 int nmethod_size = | |
516 allocation_size(code_buffer, sizeof(nmethod)) | |
517 + adjust_pcs_size(debug_info->pcs_size()) | |
518 + round_to(dependencies->size_in_bytes() , oopSize) | |
519 + round_to(handler_table->size_in_bytes(), oopSize) | |
520 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
521 + round_to(debug_info->data_size() , oopSize); | |
522 nm = new (nmethod_size) | |
523 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
524 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
525 oop_maps, | |
526 handler_table, | |
527 nul_chk_table, | |
528 compiler, | |
529 comp_level); | |
530 if (nm != NULL) { | |
531 // To make dependency checking during class loading fast, record | |
532 // the nmethod dependencies in the classes it is dependent on. | |
533 // This allows the dependency checking code to simply walk the | |
534 // class hierarchy above the loaded class, checking only nmethods | |
535 // which are dependent on those classes. The slow way is to | |
536 // check every nmethod for dependencies which makes it linear in | |
537 // the number of methods compiled. For applications with a lot | |
538 // classes the slow way is too slow. | |
539 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
540 klassOop klass = deps.context_type(); | |
541 if (klass == NULL) continue; // ignore things like evol_method | |
542 | |
543 // record this nmethod as dependent on this klass | |
544 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
545 } | |
546 } | |
547 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
548 if (PrintAssembly && nm != NULL) | |
549 Disassembler::decode(nm); | |
550 } | |
551 | |
552 // verify nmethod | |
553 debug_only(if (nm) nm->verify();) // might block | |
554 | |
555 if (nm != NULL) { | |
556 nm->log_new_nmethod(); | |
557 } | |
558 | |
559 // done | |
560 return nm; | |
561 } | |
562 | |
563 | |
564 // For native wrappers | |
565 nmethod::nmethod( | |
566 methodOop method, | |
567 int nmethod_size, | |
568 CodeOffsets* offsets, | |
569 CodeBuffer* code_buffer, | |
570 int frame_size, | |
571 ByteSize basic_lock_owner_sp_offset, | |
572 ByteSize basic_lock_sp_offset, | |
573 OopMapSet* oop_maps ) | |
574 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
575 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
576 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset), | |
577 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset) | |
578 { | |
579 { | |
580 debug_only(No_Safepoint_Verifier nsv;) | |
581 assert_locked_or_safepoint(CodeCache_lock); | |
582 | |
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583 NOT_PRODUCT(_has_debug_info = false); |
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584 _oops_do_mark_link = NULL; |
0 | 585 _method = method; |
586 _entry_bci = InvocationEntryBci; | |
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587 _jmethod_id = NULL; |
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588 _osr_link = NULL; |
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589 _scavenge_root_link = NULL; |
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590 _scavenge_root_state = 0; |
1202 | 591 _saved_nmethod_link = NULL; |
0 | 592 _compiler = NULL; |
593 // We have no exception handler or deopt handler make the | |
594 // values something that will never match a pc like the nmethod vtable entry | |
595 _exception_offset = 0; | |
596 _deoptimize_offset = 0; | |
1204 | 597 _deoptimize_mh_offset = 0; |
0 | 598 _orig_pc_offset = 0; |
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599 #ifdef HAVE_DTRACE_H |
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600 _trap_offset = 0; |
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601 #endif // def HAVE_DTRACE_H |
0 | 602 _stub_offset = data_offset(); |
603 _consts_offset = data_offset(); | |
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604 _oops_offset = data_offset(); |
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605 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 606 _scopes_pcs_offset = _scopes_data_offset; |
607 _dependencies_offset = _scopes_pcs_offset; | |
608 _handler_table_offset = _dependencies_offset; | |
609 _nul_chk_table_offset = _handler_table_offset; | |
610 _nmethod_end_offset = _nul_chk_table_offset; | |
611 _compile_id = 0; // default | |
612 _comp_level = CompLevel_none; | |
613 _entry_point = instructions_begin(); | |
614 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
615 _osr_entry_point = NULL; | |
616 _exception_cache = NULL; | |
617 _pc_desc_cache.reset_to(NULL); | |
618 | |
619 flags.clear(); | |
620 flags.state = alive; | |
621 _markedForDeoptimization = 0; | |
622 | |
623 _lock_count = 0; | |
624 _stack_traversal_mark = 0; | |
625 | |
626 code_buffer->copy_oops_to(this); | |
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627 debug_only(verify_scavenge_root_oops()); |
0 | 628 CodeCache::commit(this); |
629 VTune::create_nmethod(this); | |
630 } | |
631 | |
632 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
633 ttyLocker ttyl; // keep the following output all in one block | |
634 // This output goes directly to the tty, not the compiler log. | |
635 // To enable tools to match it up with the compilation activity, | |
636 // be sure to tag this tty output with the compile ID. | |
637 if (xtty != NULL) { | |
638 xtty->begin_head("print_native_nmethod"); | |
639 xtty->method(_method); | |
640 xtty->stamp(); | |
641 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
642 } | |
643 // print the header part first | |
644 print(); | |
645 // then print the requested information | |
646 if (PrintNativeNMethods) { | |
647 print_code(); | |
648 oop_maps->print(); | |
649 } | |
650 if (PrintRelocations) { | |
651 print_relocations(); | |
652 } | |
653 if (xtty != NULL) { | |
654 xtty->tail("print_native_nmethod"); | |
655 } | |
656 } | |
657 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
658 } | |
659 | |
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660 // For dtrace wrappers |
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661 #ifdef HAVE_DTRACE_H |
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662 nmethod::nmethod( |
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663 methodOop method, |
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664 int nmethod_size, |
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665 CodeOffsets* offsets, |
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666 CodeBuffer* code_buffer, |
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667 int frame_size) |
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668 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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669 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
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670 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), |
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671 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) |
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672 { |
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673 { |
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674 debug_only(No_Safepoint_Verifier nsv;) |
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675 assert_locked_or_safepoint(CodeCache_lock); |
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676 |
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677 NOT_PRODUCT(_has_debug_info = false); |
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678 _oops_do_mark_link = NULL; |
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679 _method = method; |
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680 _entry_bci = InvocationEntryBci; |
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681 _jmethod_id = NULL; |
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682 _osr_link = NULL; |
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683 _scavenge_root_link = NULL; |
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684 _scavenge_root_state = 0; |
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685 _compiler = NULL; |
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686 // We have no exception handler or deopt handler make the |
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687 // values something that will never match a pc like the nmethod vtable entry |
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688 _exception_offset = 0; |
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689 _deoptimize_offset = 0; |
1204 | 690 _deoptimize_mh_offset = 0; |
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691 _unwind_handler_offset = -1; |
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692 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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693 _orig_pc_offset = 0; |
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694 _stub_offset = data_offset(); |
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695 _consts_offset = data_offset(); |
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696 _oops_offset = data_offset(); |
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697 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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698 _scopes_pcs_offset = _scopes_data_offset; |
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699 _dependencies_offset = _scopes_pcs_offset; |
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700 _handler_table_offset = _dependencies_offset; |
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701 _nul_chk_table_offset = _handler_table_offset; |
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702 _nmethod_end_offset = _nul_chk_table_offset; |
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703 _compile_id = 0; // default |
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704 _comp_level = CompLevel_none; |
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705 _entry_point = instructions_begin(); |
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706 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); |
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707 _osr_entry_point = NULL; |
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708 _exception_cache = NULL; |
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709 _pc_desc_cache.reset_to(NULL); |
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710 |
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711 flags.clear(); |
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712 flags.state = alive; |
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713 _markedForDeoptimization = 0; |
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714 |
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715 _lock_count = 0; |
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716 _stack_traversal_mark = 0; |
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717 |
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718 code_buffer->copy_oops_to(this); |
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719 debug_only(verify_scavenge_root_oops()); |
116
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720 CodeCache::commit(this); |
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721 VTune::create_nmethod(this); |
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722 } |
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723 |
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724 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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725 ttyLocker ttyl; // keep the following output all in one block |
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726 // This output goes directly to the tty, not the compiler log. |
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727 // To enable tools to match it up with the compilation activity, |
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728 // be sure to tag this tty output with the compile ID. |
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729 if (xtty != NULL) { |
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730 xtty->begin_head("print_dtrace_nmethod"); |
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731 xtty->method(_method); |
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732 xtty->stamp(); |
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733 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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734 } |
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735 // print the header part first |
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736 print(); |
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737 // then print the requested information |
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738 if (PrintNMethods) { |
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739 print_code(); |
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740 } |
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741 if (PrintRelocations) { |
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742 print_relocations(); |
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743 } |
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744 if (xtty != NULL) { |
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745 xtty->tail("print_dtrace_nmethod"); |
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746 } |
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747 } |
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748 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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749 } |
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750 #endif // def HAVE_DTRACE_H |
0 | 751 |
752 void* nmethod::operator new(size_t size, int nmethod_size) { | |
753 // Always leave some room in the CodeCache for I2C/C2I adapters | |
754 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
755 return CodeCache::allocate(nmethod_size); | |
756 } | |
757 | |
758 | |
759 nmethod::nmethod( | |
760 methodOop method, | |
761 int nmethod_size, | |
762 int compile_id, | |
763 int entry_bci, | |
764 CodeOffsets* offsets, | |
765 int orig_pc_offset, | |
766 DebugInformationRecorder* debug_info, | |
767 Dependencies* dependencies, | |
768 CodeBuffer *code_buffer, | |
769 int frame_size, | |
770 OopMapSet* oop_maps, | |
771 ExceptionHandlerTable* handler_table, | |
772 ImplicitExceptionTable* nul_chk_table, | |
773 AbstractCompiler* compiler, | |
774 int comp_level | |
775 ) | |
776 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
777 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
778 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)), | |
779 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1)) | |
780 { | |
781 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
782 { | |
783 debug_only(No_Safepoint_Verifier nsv;) | |
784 assert_locked_or_safepoint(CodeCache_lock); | |
785 | |
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786 NOT_PRODUCT(_has_debug_info = false); |
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787 _oops_do_mark_link = NULL; |
0 | 788 _method = method; |
1616
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789 _jmethod_id = NULL; |
0 | 790 _compile_id = compile_id; |
791 _comp_level = comp_level; | |
792 _entry_bci = entry_bci; | |
989
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793 _osr_link = NULL; |
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794 _scavenge_root_link = NULL; |
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795 _scavenge_root_state = 0; |
0 | 796 _compiler = compiler; |
797 _orig_pc_offset = orig_pc_offset; | |
116
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798 #ifdef HAVE_DTRACE_H |
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799 _trap_offset = 0; |
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800 #endif // def HAVE_DTRACE_H |
0 | 801 _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start()); |
802 | |
803 // Exception handler and deopt handler are in the stub section | |
804 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); | |
805 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
1204 | 806 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
1378
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807 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
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808 _unwind_handler_offset = instructions_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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809 } else { |
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810 _unwind_handler_offset = -1; |
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811 } |
0 | 812 _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start()); |
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813 _oops_offset = data_offset(); |
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814 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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815 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 816 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
817 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
818 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
819 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
820 | |
821 _entry_point = instructions_begin(); | |
822 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
823 _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
824 _exception_cache = NULL; | |
825 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
826 | |
827 flags.clear(); | |
828 flags.state = alive; | |
829 _markedForDeoptimization = 0; | |
830 | |
831 _unload_reported = false; // jvmti state | |
832 | |
833 _lock_count = 0; | |
834 _stack_traversal_mark = 0; | |
835 | |
836 // Copy contents of ScopeDescRecorder to nmethod | |
837 code_buffer->copy_oops_to(this); | |
838 debug_info->copy_to(this); | |
839 dependencies->copy_to(this); | |
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840 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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841 CodeCache::add_scavenge_root_nmethod(this); |
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842 } |
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843 debug_only(verify_scavenge_root_oops()); |
0 | 844 |
845 CodeCache::commit(this); | |
846 | |
847 VTune::create_nmethod(this); | |
848 | |
849 // Copy contents of ExceptionHandlerTable to nmethod | |
850 handler_table->copy_to(this); | |
851 nul_chk_table->copy_to(this); | |
852 | |
853 // we use the information of entry points to find out if a method is | |
854 // static or non static | |
855 assert(compiler->is_c2() || | |
856 _method->is_static() == (entry_point() == _verified_entry_point), | |
857 " entry points must be same for static methods and vice versa"); | |
858 } | |
859 | |
100
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860 bool printnmethods = PrintNMethods |
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861 || CompilerOracle::should_print(_method) |
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862 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 863 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
864 print_nmethod(printnmethods); | |
865 } | |
866 | |
867 // Note: Do not verify in here as the CodeCache_lock is | |
868 // taken which would conflict with the CompiledIC_lock | |
869 // which taken during the verification of call sites. | |
870 // (was bug - gri 10/25/99) | |
871 | |
872 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
873 } | |
874 | |
875 | |
876 // Print a short set of xml attributes to identify this nmethod. The | |
877 // output should be embedded in some other element. | |
878 void nmethod::log_identity(xmlStream* log) const { | |
879 log->print(" compile_id='%d'", compile_id()); | |
880 const char* nm_kind = compile_kind(); | |
881 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
882 if (compiler() != NULL) { | |
883 log->print(" compiler='%s'", compiler()->name()); | |
884 } | |
885 #ifdef TIERED | |
886 log->print(" level='%d'", comp_level()); | |
887 #endif // TIERED | |
888 } | |
889 | |
890 | |
891 #define LOG_OFFSET(log, name) \ | |
892 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
893 log->print(" " XSTR(name) "_offset='%d'" , \ | |
894 (intptr_t)name##_begin() - (intptr_t)this) | |
895 | |
896 | |
897 void nmethod::log_new_nmethod() const { | |
898 if (LogCompilation && xtty != NULL) { | |
899 ttyLocker ttyl; | |
900 HandleMark hm; | |
901 xtty->begin_elem("nmethod"); | |
902 log_identity(xtty); | |
903 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", | |
904 instructions_begin(), size()); | |
905 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
906 | |
907 LOG_OFFSET(xtty, relocation); | |
908 LOG_OFFSET(xtty, code); | |
909 LOG_OFFSET(xtty, stub); | |
910 LOG_OFFSET(xtty, consts); | |
911 LOG_OFFSET(xtty, scopes_data); | |
912 LOG_OFFSET(xtty, scopes_pcs); | |
913 LOG_OFFSET(xtty, dependencies); | |
914 LOG_OFFSET(xtty, handler_table); | |
915 LOG_OFFSET(xtty, nul_chk_table); | |
916 LOG_OFFSET(xtty, oops); | |
917 | |
918 xtty->method(method()); | |
919 xtty->stamp(); | |
920 xtty->end_elem(); | |
921 } | |
922 } | |
923 | |
924 #undef LOG_OFFSET | |
925 | |
926 | |
927 // Print out more verbose output usually for a newly created nmethod. | |
928 void nmethod::print_on(outputStream* st, const char* title) const { | |
929 if (st != NULL) { | |
930 ttyLocker ttyl; | |
931 // Print a little tag line that looks like +PrintCompilation output: | |
989
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932 int tlen = (int) strlen(title); |
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933 bool do_nl = false; |
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934 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } |
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935 st->print("%3d%c %.*s", |
0 | 936 compile_id(), |
937 is_osr_method() ? '%' : | |
938 method() != NULL && | |
939 is_native_method() ? 'n' : ' ', | |
989
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940 tlen, title); |
0 | 941 #ifdef TIERED |
942 st->print(" (%d) ", comp_level()); | |
943 #endif // TIERED | |
944 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); | |
989
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945 if (Universe::heap()->is_gc_active() && method() != NULL) { |
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946 st->print("(method)"); |
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947 } else if (method() != NULL) { |
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948 method()->print_short_name(st); |
0 | 949 if (is_osr_method()) |
950 st->print(" @ %d", osr_entry_bci()); | |
951 if (method()->code_size() > 0) | |
952 st->print(" (%d bytes)", method()->code_size()); | |
953 } | |
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954 |
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955 if (do_nl) st->cr(); |
0 | 956 } |
957 } | |
958 | |
959 | |
960 void nmethod::print_nmethod(bool printmethod) { | |
961 ttyLocker ttyl; // keep the following output all in one block | |
962 if (xtty != NULL) { | |
963 xtty->begin_head("print_nmethod"); | |
964 xtty->stamp(); | |
965 xtty->end_head(); | |
966 } | |
967 // print the header part first | |
968 print(); | |
969 // then print the requested information | |
970 if (printmethod) { | |
971 print_code(); | |
972 print_pcs(); | |
973 oop_maps()->print(); | |
974 } | |
975 if (PrintDebugInfo) { | |
976 print_scopes(); | |
977 } | |
978 if (PrintRelocations) { | |
979 print_relocations(); | |
980 } | |
981 if (PrintDependencies) { | |
982 print_dependencies(); | |
983 } | |
984 if (PrintExceptionHandlers) { | |
985 print_handler_table(); | |
986 print_nul_chk_table(); | |
987 } | |
988 if (xtty != NULL) { | |
989 xtty->tail("print_nmethod"); | |
990 } | |
991 } | |
992 | |
993 | |
994 void nmethod::set_version(int v) { | |
995 flags.version = v; | |
996 } | |
997 | |
998 | |
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999 // Promote one word from an assembly-time handle to a live embedded oop. |
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1000 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1001 if (handle == NULL || |
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1002 // As a special case, IC oops are initialized to 1 or -1. |
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1003 handle == (jobject) Universe::non_oop_word()) { |
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1004 (*dest) = (oop) handle; |
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1005 } else { |
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1006 (*dest) = JNIHandles::resolve_non_null(handle); |
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1007 } |
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1008 } |
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1009 |
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1010 |
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1011 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1012 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1013 int length = array->length(); |
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1014 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1015 oop* dest = oops_begin(); |
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1016 for (int index = 0 ; index < length; index++) { |
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1017 initialize_immediate_oop(&dest[index], array->at(index)); |
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1018 } |
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1019 |
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1020 // Now we can fix up all the oops in the code. We need to do this |
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1021 // in the code because the assembler uses jobjects as placeholders. |
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1022 // The code and relocations have already been initialized by the |
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1023 // CodeBlob constructor, so it is valid even at this early point to |
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1024 // iterate over relocations and patch the code. |
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1025 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1026 } |
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1027 |
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1028 |
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1029 bool nmethod::is_at_poll_return(address pc) { |
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1030 RelocIterator iter(this, pc, pc+1); |
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1031 while (iter.next()) { |
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1032 if (iter.type() == relocInfo::poll_return_type) |
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1033 return true; |
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1034 } |
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1035 return false; |
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1036 } |
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1037 |
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1038 |
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1039 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1040 RelocIterator iter(this, pc, pc+1); |
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1041 while (iter.next()) { |
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1042 relocInfo::relocType t = iter.type(); |
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1043 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1044 return true; |
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1045 } |
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1046 return false; |
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1047 } |
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1048 |
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1049 |
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1050 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1051 // re-patch all oop-bearing instructions, just in case some oops moved |
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1052 RelocIterator iter(this, begin, end); |
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1053 while (iter.next()) { |
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1054 if (iter.type() == relocInfo::oop_type) { |
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1055 oop_Relocation* reloc = iter.oop_reloc(); |
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1056 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1057 oop* dest = reloc->oop_addr(); |
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1058 initialize_immediate_oop(dest, (jobject) *dest); |
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1059 } |
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1060 // Refresh the oop-related bits of this instruction. |
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1061 reloc->fix_oop_relocation(); |
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1062 } |
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1063 |
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1064 // There must not be any interfering patches or breakpoints. |
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1065 assert(!(iter.type() == relocInfo::breakpoint_type |
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1066 && iter.breakpoint_reloc()->active()), |
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1067 "no active breakpoint"); |
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1068 } |
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1069 } |
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1070 |
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1071 |
0 | 1072 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1073 PcDesc* pd = pc_desc_at(pc); | |
1074 guarantee(pd != NULL, "scope must be present"); | |
1075 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1076 pd->obj_decode_offset(), pd->should_reexecute(), |
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1077 pd->return_oop()); |
0 | 1078 } |
1079 | |
1080 | |
1081 void nmethod::clear_inline_caches() { | |
1082 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1083 if (is_zombie()) { | |
1084 return; | |
1085 } | |
1086 | |
1087 RelocIterator iter(this); | |
1088 while (iter.next()) { | |
1089 iter.reloc()->clear_inline_cache(); | |
1090 } | |
1091 } | |
1092 | |
1093 | |
1094 void nmethod::cleanup_inline_caches() { | |
1095 | |
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1096 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1097 |
1098 // If the method is not entrant or zombie then a JMP is plastered over the | |
1099 // first few bytes. If an oop in the old code was there, that oop | |
1100 // should not get GC'd. Skip the first few bytes of oops on | |
1101 // not-entrant methods. | |
1102 address low_boundary = verified_entry_point(); | |
1103 if (!is_in_use()) { | |
1104 low_boundary += NativeJump::instruction_size; | |
1105 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1106 // This means that the low_boundary is going to be a little too high. | |
1107 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1108 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1109 } | |
1110 | |
1111 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1112 ResourceMark rm; | |
1113 RelocIterator iter(this, low_boundary); | |
1114 while(iter.next()) { | |
1115 switch(iter.type()) { | |
1116 case relocInfo::virtual_call_type: | |
1117 case relocInfo::opt_virtual_call_type: { | |
1118 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1119 // Ok, to lookup references to zombies here | |
1120 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1121 if( cb != NULL && cb->is_nmethod() ) { | |
1122 nmethod* nm = (nmethod*)cb; | |
1123 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1124 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1125 } |
1126 break; | |
1127 } | |
1128 case relocInfo::static_call_type: { | |
1129 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1130 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1131 if( cb != NULL && cb->is_nmethod() ) { | |
1132 nmethod* nm = (nmethod*)cb; | |
1133 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1134 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1135 } |
1136 break; | |
1137 } | |
1138 } | |
1139 } | |
1140 } | |
1141 | |
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1142 // This is a private interface with the sweeper. |
0 | 1143 void nmethod::mark_as_seen_on_stack() { |
1144 assert(is_not_entrant(), "must be a non-entrant method"); | |
1145 set_stack_traversal_mark(NMethodSweeper::traversal_count()); | |
1146 } | |
1147 | |
1148 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
1149 bool nmethod::can_not_entrant_be_converted() { | |
1150 assert(is_not_entrant(), "must be a non-entrant method"); | |
1151 | |
1152 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1153 // count can be greater than the stack traversal count before it hits the | |
1154 // nmethod for the second time. | |
1155 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
1156 } | |
1157 | |
1158 void nmethod::inc_decompile_count() { | |
1159 // Could be gated by ProfileTraps, but do not bother... | |
1160 methodOop m = method(); | |
1161 if (m == NULL) return; | |
1162 methodDataOop mdo = m->method_data(); | |
1163 if (mdo == NULL) return; | |
1164 // There is a benign race here. See comments in methodDataOop.hpp. | |
1165 mdo->inc_decompile_count(); | |
1166 } | |
1167 | |
1168 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1169 | |
1170 post_compiled_method_unload(); | |
1171 | |
1172 // Since this nmethod is being unloaded, make sure that dependencies | |
1173 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1174 // indicate that this work is being done during a GC. | |
1175 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1176 assert(is_alive != NULL, "Should be non-NULL"); | |
1177 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1178 flush_dependencies(is_alive); | |
1179 | |
1180 // Break cycle between nmethod & method | |
1181 if (TraceClassUnloading && WizardMode) { | |
1182 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1183 " unloadable], methodOop(" INTPTR_FORMAT | |
1184 "), cause(" INTPTR_FORMAT ")", | |
1185 this, (address)_method, (address)cause); | |
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1186 if (!Universe::heap()->is_gc_active()) |
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1187 cause->klass()->print(); |
0 | 1188 } |
941 | 1189 // Unlink the osr method, so we do not look this up again |
1190 if (is_osr_method()) { | |
1191 invalidate_osr_method(); | |
1192 } | |
0 | 1193 // If _method is already NULL the methodOop is about to be unloaded, |
1194 // so we don't have to break the cycle. Note that it is possible to | |
1195 // have the methodOop live here, in case we unload the nmethod because | |
1196 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1197 if (_method != NULL) { | |
1198 // OSR methods point to the methodOop, but the methodOop does not | |
1199 // point back! | |
1200 if (_method->code() == this) { | |
1201 _method->clear_code(); // Break a cycle | |
1202 } | |
1203 _method = NULL; // Clear the method of this dead nmethod | |
1204 } | |
1205 // Make the class unloaded - i.e., change state and notify sweeper | |
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1206 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1207 if (is_in_use()) { |
1208 // Transitioning directly from live to unloaded -- so | |
1209 // we need to force a cache clean-up; remember this | |
1210 // for later on. | |
1211 CodeCache::set_needs_cache_clean(true); | |
1212 } | |
1213 flags.state = unloaded; | |
1214 | |
1109
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1215 // Log the unloading. |
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1216 log_state_change(); |
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1217 |
0 | 1218 // The methodOop is gone at this point |
1219 assert(_method == NULL, "Tautology"); | |
1220 | |
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1221 set_osr_link(NULL); |
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1222 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1223 NMethodSweeper::notify(this); |
1224 } | |
1225 | |
1226 void nmethod::invalidate_osr_method() { | |
1227 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1228 // Remove from list of active nmethods | |
1229 if (method() != NULL) | |
1230 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1231 // Set entry as invalid | |
1232 _entry_bci = InvalidOSREntryBci; | |
1233 } | |
1234 | |
1109
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1235 void nmethod::log_state_change() const { |
0 | 1236 if (LogCompilation) { |
1237 if (xtty != NULL) { | |
1238 ttyLocker ttyl; // keep the following output all in one block | |
1109
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1239 if (flags.state == unloaded) { |
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1240 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1241 os::current_thread_id()); |
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1242 } else { |
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1243 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1244 os::current_thread_id(), |
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1245 (flags.state == zombie ? " zombie='1'" : "")); |
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1246 } |
0 | 1247 log_identity(xtty); |
1248 xtty->stamp(); | |
1249 xtty->end_elem(); | |
1250 } | |
1251 } | |
1109
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1252 if (PrintCompilation && flags.state != unloaded) { |
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1253 print_on(tty, flags.state == zombie ? "made zombie " : "made not entrant "); |
0 | 1254 tty->cr(); |
1255 } | |
1256 } | |
1257 | |
1258 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1259 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1260 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
1261 | |
1206
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1262 bool was_alive = false; |
0 | 1263 |
1264 // Make sure the nmethod is not flushed in case of a safepoint in code below. | |
1265 nmethodLocker nml(this); | |
1266 | |
1267 { | |
1206
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1268 // If the method is already zombie there is nothing to do |
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1269 if (is_zombie()) { |
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1270 return false; |
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1271 } |
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1272 |
1109
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1273 // invalidate osr nmethod before acquiring the patching lock since |
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1274 // they both acquire leaf locks and we don't want a deadlock. |
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1275 // This logic is equivalent to the logic below for patching the |
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1276 // verified entry point of regular methods. |
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1277 if (is_osr_method()) { |
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1278 // this effectively makes the osr nmethod not entrant |
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1279 invalidate_osr_method(); |
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1280 } |
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1281 |
0 | 1282 // Enter critical section. Does not block for safepoint. |
1283 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1284 |
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1285 if (flags.state == state) { |
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1286 // another thread already performed this transition so nothing |
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1287 // to do, but return false to indicate this. |
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1288 return false; |
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1289 } |
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1290 |
0 | 1291 // The caller can be calling the method statically or through an inline |
1292 // cache call. | |
1109
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1293 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1294 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1295 SharedRuntime::get_handle_wrong_method_stub()); | |
1296 assert (NativeJump::instruction_size == nmethod::_zombie_instruction_size, ""); | |
1297 } | |
1298 | |
1206
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1299 was_alive = is_in_use(); // Read state under lock |
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1300 |
0 | 1301 // Change state |
1302 flags.state = state; | |
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1303 |
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1304 // Log the transition once |
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1305 log_state_change(); |
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1306 |
0 | 1307 } // leave critical region under Patching_lock |
1308 | |
1538
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1309 // When the nmethod becomes zombie it is no longer alive so the |
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1310 // dependencies must be flushed. nmethods in the not_entrant |
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1311 // state will be flushed later when the transition to zombie |
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1312 // happens or they get unloaded. |
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1313 if (state == zombie) { |
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1314 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1315 flush_dependencies(NULL); |
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1316 } else { |
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1317 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1318 } |
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1319 |
0 | 1320 if (state == not_entrant) { |
1321 Events::log("Make nmethod not entrant " INTPTR_FORMAT, this); | |
1322 } else { | |
1323 Events::log("Make nmethod zombie " INTPTR_FORMAT, this); | |
1324 } | |
1325 | |
1326 if (TraceCreateZombies) { | |
1327 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1328 } | |
1329 | |
1330 // Make sweeper aware that there is a zombie method that needs to be removed | |
1331 NMethodSweeper::notify(this); | |
1332 | |
1333 // not_entrant only stuff | |
1334 if (state == not_entrant) { | |
1335 mark_as_seen_on_stack(); | |
1336 } | |
1337 | |
1206
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1338 if (was_alive) { |
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1339 // It's a true state change, so mark the method as decompiled. |
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1340 // Do it only for transition from alive. |
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1341 inc_decompile_count(); |
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1342 } |
0 | 1343 |
1344 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
1345 // and it hasn't already been reported for this nmethod then report it now. | |
1346 // (the event may have been reported earilier if the GC marked it for unloading). | |
1347 if (state == zombie) { | |
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1348 post_compiled_method_unload(); |
0 | 1349 } |
1350 | |
1351 | |
1352 // Zombie only stuff | |
1353 if (state == zombie) { | |
1354 VTune::delete_nmethod(this); | |
1355 } | |
1356 | |
1357 // Check whether method got unloaded at a safepoint before this, | |
1358 // if so we can skip the flushing steps below | |
1109
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1359 if (method() == NULL) return true; |
0 | 1360 |
1361 // Remove nmethod from method. | |
1362 // We need to check if both the _code and _from_compiled_code_entry_point | |
1363 // refer to this nmethod because there is a race in setting these two fields | |
1364 // in methodOop as seen in bugid 4947125. | |
1365 // If the vep() points to the zombie nmethod, the memory for the nmethod | |
1366 // could be flushed and the compiler and vtable stubs could still call | |
1367 // through it. | |
1368 if (method()->code() == this || | |
1369 method()->from_compiled_entry() == verified_entry_point()) { | |
1370 HandleMark hm; | |
1371 method()->clear_code(); | |
1372 } | |
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1373 |
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1374 return true; |
0 | 1375 } |
1376 | |
1377 void nmethod::flush() { | |
1378 // Note that there are no valid oops in the nmethod anymore. | |
1379 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1380 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1381 | |
1382 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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|
1383 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1384 |
1385 // completely deallocate this method | |
1386 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1387 if (PrintMethodFlushing) { | |
1202 | 1388 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1389 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1390 } |
1391 | |
1392 // We need to deallocate any ExceptionCache data. | |
1393 // Note that we do not need to grab the nmethod lock for this, it | |
1394 // better be thread safe if we're disposing of it! | |
1395 ExceptionCache* ec = exception_cache(); | |
1396 set_exception_cache(NULL); | |
1397 while(ec != NULL) { | |
1398 ExceptionCache* next = ec->next(); | |
1399 delete ec; | |
1400 ec = next; | |
1401 } | |
1402 | |
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1403 if (on_scavenge_root_list()) { |
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1404 CodeCache::drop_scavenge_root_nmethod(this); |
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1405 } |
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1406 |
1202 | 1407 if (is_speculatively_disconnected()) { |
1408 CodeCache::remove_saved_code(this); | |
1409 } | |
1410 | |
0 | 1411 ((CodeBlob*)(this))->flush(); |
1412 | |
1413 CodeCache::free(this); | |
1414 } | |
1415 | |
1416 | |
1417 // | |
1418 // Notify all classes this nmethod is dependent on that it is no | |
1419 // longer dependent. This should only be called in two situations. | |
1420 // First, when a nmethod transitions to a zombie all dependents need | |
1421 // to be clear. Since zombification happens at a safepoint there's no | |
1422 // synchronization issues. The second place is a little more tricky. | |
1423 // During phase 1 of mark sweep class unloading may happen and as a | |
1424 // result some nmethods may get unloaded. In this case the flushing | |
1425 // of dependencies must happen during phase 1 since after GC any | |
1426 // dependencies in the unloaded nmethod won't be updated, so | |
1427 // traversing the dependency information in unsafe. In that case this | |
1428 // function is called with a non-NULL argument and this function only | |
1429 // notifies instanceKlasses that are reachable | |
1430 | |
1431 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1538
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1432 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1433 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1434 "is_alive is non-NULL if and only if we are called during GC"); | |
1435 if (!has_flushed_dependencies()) { | |
1436 set_has_flushed_dependencies(); | |
1437 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1438 klassOop klass = deps.context_type(); | |
1439 if (klass == NULL) continue; // ignore things like evol_method | |
1440 | |
1441 // During GC the is_alive closure is non-NULL, and is used to | |
1442 // determine liveness of dependees that need to be updated. | |
1443 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1444 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1445 } | |
1446 } | |
1447 } | |
1448 } | |
1449 | |
1450 | |
1451 // If this oop is not live, the nmethod can be unloaded. | |
1452 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1453 OopClosure* keep_alive, | |
1454 oop* root, bool unloading_occurred) { | |
1455 assert(root != NULL, "just checking"); | |
1456 oop obj = *root; | |
1457 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1458 return false; | |
1459 } | |
1460 if (obj->is_compiledICHolder()) { | |
1461 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1462 if (is_alive->do_object_b( | |
1463 cichk_oop->holder_method()->method_holder()) && | |
1464 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1465 // The oop should be kept alive | |
1466 keep_alive->do_oop(root); | |
1467 return false; | |
1468 } | |
1469 } | |
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1470 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1471 // simply because one of its constant oops has gone dead. |
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1472 // No actual classes need to be unloaded in order for this to occur. |
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1473 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1474 make_unloaded(is_alive, obj); |
1475 return true; | |
1476 } | |
1477 | |
1478 // ------------------------------------------------------------------ | |
1479 // post_compiled_method_load_event | |
1480 // new method for install_code() path | |
1481 // Transfer information from compilation to jvmti | |
1482 void nmethod::post_compiled_method_load_event() { | |
1483 | |
1484 methodOop moop = method(); | |
1485 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1486 moop->klass_name()->bytes(), | |
1487 moop->klass_name()->utf8_length(), | |
1488 moop->name()->bytes(), | |
1489 moop->name()->utf8_length(), | |
1490 moop->signature()->bytes(), | |
1491 moop->signature()->utf8_length(), | |
1492 code_begin(), code_size()); | |
1493 | |
1616
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1494 if (JvmtiExport::should_post_compiled_method_load() || |
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1495 JvmtiExport::should_post_compiled_method_unload()) { |
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1496 get_and_cache_jmethod_id(); |
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1497 } |
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|
1498 |
0 | 1499 if (JvmtiExport::should_post_compiled_method_load()) { |
1500 JvmtiExport::post_compiled_method_load(this); | |
1501 } | |
1502 } | |
1503 | |
1616
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1504 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1505 if (_jmethod_id == NULL) { |
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1506 // Cache the jmethod_id since it can no longer be looked up once the |
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1507 // method itself has been marked for unloading. |
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1508 _jmethod_id = method()->jmethod_id(); |
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1509 } |
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1510 return _jmethod_id; |
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|
1511 } |
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|
1512 |
0 | 1513 void nmethod::post_compiled_method_unload() { |
1577
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1514 if (unload_reported()) { |
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1515 // During unloading we transition to unloaded and then to zombie |
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1516 // and the unloading is reported during the first transition. |
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1517 return; |
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1518 } |
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|
1519 |
0 | 1520 assert(_method != NULL && !is_unloaded(), "just checking"); |
1521 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1522 | |
1523 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1524 // post the event. Sometime later this nmethod will be made a zombie |
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1525 // by the sweeper but the methodOop will not be valid at that point. |
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1526 // If the _jmethod_id is null then no load event was ever requested |
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1527 // so don't bother posting the unload. The main reason for this is |
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1528 // that the jmethodID is a weak reference to the methodOop so if |
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1529 // it's being unloaded there's no way to look it up since the weak |
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1530 // ref will have been cleared. |
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1531 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1532 assert(!unload_reported(), "already unloaded"); |
1533 HandleMark hm; | |
1616
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1534 JvmtiExport::post_compiled_method_unload(_jmethod_id, code_begin()); |
0 | 1535 } |
1536 | |
1537 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1538 // any time. As the nmethod is being unloaded now we mark it has | |
1539 // having the unload event reported - this will ensure that we don't | |
1540 // attempt to report the event in the unlikely scenario where the | |
1541 // event is enabled at the time the nmethod is made a zombie. | |
1542 set_unload_reported(); | |
1543 } | |
1544 | |
1545 // This is called at the end of the strong tracing/marking phase of a | |
1546 // GC to unload an nmethod if it contains otherwise unreachable | |
1547 // oops. | |
1548 | |
1549 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1550 OopClosure* keep_alive, bool unloading_occurred) { | |
1551 // Make sure the oop's ready to receive visitors | |
1552 assert(!is_zombie() && !is_unloaded(), | |
1553 "should not call follow on zombie or unloaded nmethod"); | |
1554 | |
1555 // If the method is not entrant then a JMP is plastered over the | |
1556 // first few bytes. If an oop in the old code was there, that oop | |
1557 // should not get GC'd. Skip the first few bytes of oops on | |
1558 // not-entrant methods. | |
1559 address low_boundary = verified_entry_point(); | |
1560 if (is_not_entrant()) { | |
1561 low_boundary += NativeJump::instruction_size; | |
1562 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1563 // (See comment above.) | |
1564 } | |
1565 | |
1566 // The RedefineClasses() API can cause the class unloading invariant | |
1567 // to no longer be true. See jvmtiExport.hpp for details. | |
1568 // Also, leave a debugging breadcrumb in local flag. | |
1569 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1570 if (a_class_was_redefined) { | |
1571 // This set of the unloading_occurred flag is done before the | |
1572 // call to post_compiled_method_unload() so that the unloading | |
1573 // of this nmethod is reported. | |
1574 unloading_occurred = true; | |
1575 } | |
1576 | |
1577 // Follow methodOop | |
1578 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1579 return; | |
1580 } | |
1581 | |
1582 // Exception cache | |
1583 ExceptionCache* ec = exception_cache(); | |
1584 while (ec != NULL) { | |
1585 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1586 oop ex = *ex_addr; | |
1587 ExceptionCache* next_ec = ec->next(); | |
1588 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1589 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1590 remove_from_exception_cache(ec); | |
1591 } | |
1592 ec = next_ec; | |
1593 } | |
1594 | |
1595 // If class unloading occurred we first iterate over all inline caches and | |
1596 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1597 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1598 // iteration below. | |
1599 if (unloading_occurred) { | |
1600 RelocIterator iter(this, low_boundary); | |
1601 while(iter.next()) { | |
1602 if (iter.type() == relocInfo::virtual_call_type) { | |
1603 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1604 oop ic_oop = ic->cached_oop(); | |
1605 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1606 // The only exception is compiledICHolder oops which may | |
1607 // yet be marked below. (We check this further below). | |
1608 if (ic_oop->is_compiledICHolder()) { | |
1609 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1610 if (is_alive->do_object_b( | |
1611 cichk_oop->holder_method()->method_holder()) && | |
1612 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1613 continue; | |
1614 } | |
1615 } | |
1616 ic->set_to_clean(); | |
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1617 assert(ic->cached_oop() == NULL, |
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1618 "cached oop in IC should be cleared"); |
0 | 1619 } |
1620 } | |
1621 } | |
1622 } | |
1623 | |
1624 // Compiled code | |
1625 RelocIterator iter(this, low_boundary); | |
1626 while (iter.next()) { | |
1627 if (iter.type() == relocInfo::oop_type) { | |
1628 oop_Relocation* r = iter.oop_reloc(); | |
1629 // In this loop, we must only traverse those oops directly embedded in | |
1630 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1631 assert(1 == (r->oop_is_immediate()) + | |
1632 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1633 "oop must be found in exactly one place"); | |
1634 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1635 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1636 return; | |
1637 } | |
1638 } | |
1639 } | |
1640 } | |
1641 | |
1642 | |
1643 // Scopes | |
1644 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1645 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1646 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1647 return; | |
1648 } | |
1649 } | |
1650 | |
1651 #ifndef PRODUCT | |
1652 // This nmethod was not unloaded; check below that all CompiledICs | |
1653 // refer to marked oops. | |
1654 { | |
1655 RelocIterator iter(this, low_boundary); | |
1656 while (iter.next()) { | |
1657 if (iter.type() == relocInfo::virtual_call_type) { | |
1658 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1659 oop ic_oop = ic->cached_oop(); | |
1660 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1661 "Found unmarked ic_oop in reachable nmethod"); | |
1662 } | |
1663 } | |
1664 } | |
1665 #endif // !PRODUCT | |
1666 } | |
1667 | |
941 | 1668 // This method is called twice during GC -- once while |
1669 // tracing the "active" nmethods on thread stacks during | |
1670 // the (strong) marking phase, and then again when walking | |
1671 // the code cache contents during the weak roots processing | |
1672 // phase. The two uses are distinguished by means of the | |
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1673 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1674 // case. We want to walk the weak roots in the nmethod |
1675 // only in the second case. The weak roots in the nmethod | |
1676 // are the oops in the ExceptionCache and the InlineCache | |
1677 // oops. | |
994
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1678 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1679 // make sure the oops ready to receive visitors |
1680 assert(!is_zombie() && !is_unloaded(), | |
1681 "should not call follow on zombie or unloaded nmethod"); | |
1682 | |
1683 // If the method is not entrant or zombie then a JMP is plastered over the | |
1684 // first few bytes. If an oop in the old code was there, that oop | |
1685 // should not get GC'd. Skip the first few bytes of oops on | |
1686 // not-entrant methods. | |
1687 address low_boundary = verified_entry_point(); | |
1688 if (is_not_entrant()) { | |
1689 low_boundary += NativeJump::instruction_size; | |
1690 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1691 // (See comment above.) | |
1692 } | |
1693 | |
1694 // Compiled code | |
1695 f->do_oop((oop*) &_method); | |
994
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1696 if (!do_strong_roots_only) { |
941 | 1697 // weak roots processing phase -- update ExceptionCache oops |
1698 ExceptionCache* ec = exception_cache(); | |
1699 while(ec != NULL) { | |
1700 f->do_oop((oop*)ec->exception_type_addr()); | |
1701 ec = ec->next(); | |
1702 } | |
1703 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1704 |
1705 RelocIterator iter(this, low_boundary); | |
941 | 1706 |
0 | 1707 while (iter.next()) { |
1708 if (iter.type() == relocInfo::oop_type ) { | |
1709 oop_Relocation* r = iter.oop_reloc(); | |
1710 // In this loop, we must only follow those oops directly embedded in | |
1711 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1712 assert(1 == (r->oop_is_immediate()) + |
1713 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1714 "oop must be found in exactly one place"); | |
0 | 1715 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1716 f->do_oop(r->oop_addr()); | |
1717 } | |
1718 } | |
1719 } | |
1720 | |
1721 // Scopes | |
989
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1722 // This includes oop constants not inlined in the code stream. |
0 | 1723 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1724 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1725 f->do_oop(p); | |
1726 } | |
1727 } | |
1728 | |
989
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1729 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1730 |
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1731 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1732 |
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1733 // An nmethod is "marked" if its _mark_link is set non-null. |
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1734 // Even if it is the end of the linked list, it will have a non-null link value, |
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1735 // as long as it is on the list. |
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1736 // This code must be MP safe, because it is used from parallel GC passes. |
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1737 bool nmethod::test_set_oops_do_mark() { |
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1738 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1739 nmethod* observed_mark_link = _oops_do_mark_link; |
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1740 if (observed_mark_link == NULL) { |
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1741 // Claim this nmethod for this thread to mark. |
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1742 observed_mark_link = (nmethod*) |
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1743 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1744 if (observed_mark_link == NULL) { |
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|
1745 |
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1746 // Atomically append this nmethod (now claimed) to the head of the list: |
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1747 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1748 for (;;) { |
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1749 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1750 _oops_do_mark_link = required_mark_nmethods; |
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1751 observed_mark_nmethods = (nmethod*) |
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1752 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1753 if (observed_mark_nmethods == required_mark_nmethods) |
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|
1754 break; |
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|
1755 } |
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1756 // Mark was clear when we first saw this guy. |
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1757 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1758 return false; |
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|
1759 } |
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|
1760 } |
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1761 // On fall through, another racing thread marked this nmethod before we did. |
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|
1762 return true; |
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|
1763 } |
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|
1764 |
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|
1765 void nmethod::oops_do_marking_prologue() { |
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1766 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1767 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1768 // We use cmpxchg_ptr instead of regular assignment here because the user |
148e5441d916
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1769 // may fork a bunch of threads, and we need them all to see the same state. |
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1770 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1771 guarantee(observed == NULL, "no races in this sequential code"); |
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|
1772 } |
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|
1773 |
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1774 void nmethod::oops_do_marking_epilogue() { |
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|
1775 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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|
1776 nmethod* cur = _oops_do_mark_nmethods; |
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1777 while (cur != NMETHOD_SENTINEL) { |
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|
1778 assert(cur != NULL, "not NULL-terminated"); |
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1779 nmethod* next = cur->_oops_do_mark_link; |
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1780 cur->_oops_do_mark_link = NULL; |
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1781 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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|
1782 cur = next; |
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|
1783 } |
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|
1784 void* required = _oops_do_mark_nmethods; |
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1785 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1786 guarantee(observed == required, "no races in this sequential code"); |
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1787 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1788 } |
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1789 |
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1790 class DetectScavengeRoot: public OopClosure { |
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1791 bool _detected_scavenge_root; |
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1792 public: |
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1793 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1794 { NOT_PRODUCT(_print_nm = NULL); } |
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1795 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1796 virtual void do_oop(oop* p) { |
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1797 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1798 NOT_PRODUCT(maybe_print(p)); |
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1799 _detected_scavenge_root = true; |
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1800 } |
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1801 } |
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1802 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1803 |
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1804 #ifndef PRODUCT |
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1805 nmethod* _print_nm; |
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1806 void maybe_print(oop* p) { |
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1807 if (_print_nm == NULL) return; |
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1808 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1809 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1810 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1811 (intptr_t)(*p), (intptr_t)p); |
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1812 (*p)->print(); |
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1813 } |
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1814 #endif //PRODUCT |
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1815 }; |
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1816 |
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1817 bool nmethod::detect_scavenge_root_oops() { |
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1818 DetectScavengeRoot detect_scavenge_root; |
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1819 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1820 oops_do(&detect_scavenge_root); |
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1821 return detect_scavenge_root.detected_scavenge_root(); |
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1822 } |
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1823 |
0 | 1824 // Method that knows how to preserve outgoing arguments at call. This method must be |
1825 // called with a frame corresponding to a Java invoke | |
1826 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1827 if (!method()->is_native()) { | |
1828 SimpleScopeDesc ssd(this, fr.pc()); | |
1829 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci()); | |
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1830 bool has_receiver = call->has_receiver(); |
0 | 1831 symbolOop signature = call->signature(); |
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1832 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1833 } |
1834 } | |
1835 | |
1836 | |
1837 oop nmethod::embeddedOop_at(u_char* p) { | |
1838 RelocIterator iter(this, p, p + oopSize); | |
1839 while (iter.next()) | |
1840 if (iter.type() == relocInfo::oop_type) { | |
1841 return iter.oop_reloc()->oop_value(); | |
1842 } | |
1843 return NULL; | |
1844 } | |
1845 | |
1846 | |
1847 inline bool includes(void* p, void* from, void* to) { | |
1848 return from <= p && p < to; | |
1849 } | |
1850 | |
1851 | |
1852 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1853 assert(count >= 2, "must be sentinel values, at least"); | |
1854 | |
1855 #ifdef ASSERT | |
1856 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1857 int prev_offset = pcs[0].pc_offset(); | |
1858 assert(prev_offset == PcDesc::lower_offset_limit, | |
1859 "must start with a sentinel"); | |
1860 for (int i = 1; i < count; i++) { | |
1861 int this_offset = pcs[i].pc_offset(); | |
1862 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1863 prev_offset = this_offset; | |
1864 } | |
1865 assert(prev_offset == PcDesc::upper_offset_limit, | |
1866 "must end with a sentinel"); | |
1867 #endif //ASSERT | |
1868 | |
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1869 // Search for MethodHandle invokes and tag the nmethod. |
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1870 for (int i = 0; i < count; i++) { |
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1871 if (pcs[i].is_method_handle_invoke()) { |
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1872 set_has_method_handle_invokes(true); |
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1873 break; |
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1874 } |
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1875 } |
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1876 |
0 | 1877 int size = count * sizeof(PcDesc); |
1878 assert(scopes_pcs_size() >= size, "oob"); | |
1879 memcpy(scopes_pcs_begin(), pcs, size); | |
1880 | |
1881 // Adjust the final sentinel downward. | |
1882 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1883 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1884 last_pc->set_pc_offset(instructions_size() + 1); | |
1885 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { | |
1886 // Fill any rounding gaps with copies of the last record. | |
1887 last_pc[1] = last_pc[0]; | |
1888 } | |
1889 // The following assert could fail if sizeof(PcDesc) is not | |
1890 // an integral multiple of oopSize (the rounding term). | |
1891 // If it fails, change the logic to always allocate a multiple | |
1892 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1893 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1894 } | |
1895 | |
1896 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1897 assert(scopes_data_size() >= size, "oob"); | |
1898 memcpy(scopes_data_begin(), buffer, size); | |
1899 } | |
1900 | |
1901 | |
1902 #ifdef ASSERT | |
1903 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1904 PcDesc* lower = nm->scopes_pcs_begin(); | |
1905 PcDesc* upper = nm->scopes_pcs_end(); | |
1906 lower += 1; // exclude initial sentinel | |
1907 PcDesc* res = NULL; | |
1908 for (PcDesc* p = lower; p < upper; p++) { | |
1909 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1910 if (match_desc(p, pc_offset, approximate)) { | |
1911 if (res == NULL) | |
1912 res = p; | |
1913 else | |
1914 res = (PcDesc*) badAddress; | |
1915 } | |
1916 } | |
1917 return res; | |
1918 } | |
1919 #endif | |
1920 | |
1921 | |
1922 // Finds a PcDesc with real-pc equal to "pc" | |
1923 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1924 address base_address = instructions_begin(); | |
1925 if ((pc < base_address) || | |
1926 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1927 return NULL; // PC is wildly out of range | |
1928 } | |
1929 int pc_offset = (int) (pc - base_address); | |
1930 | |
1931 // Check the PcDesc cache if it contains the desired PcDesc | |
1932 // (This as an almost 100% hit rate.) | |
1933 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1934 if (res != NULL) { | |
1935 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1936 return res; | |
1937 } | |
1938 | |
1939 // Fallback algorithm: quasi-linear search for the PcDesc | |
1940 // Find the last pc_offset less than the given offset. | |
1941 // The successor must be the required match, if there is a match at all. | |
1942 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1943 PcDesc* lower = scopes_pcs_begin(); | |
1944 PcDesc* upper = scopes_pcs_end(); | |
1945 upper -= 1; // exclude final sentinel | |
1946 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1947 | |
1948 #define assert_LU_OK \ | |
1949 /* invariant on lower..upper during the following search: */ \ | |
1950 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1951 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1952 assert_LU_OK; | |
1953 | |
1954 // Use the last successful return as a split point. | |
1955 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
1956 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1957 if (mid->pc_offset() < pc_offset) { | |
1958 lower = mid; | |
1959 } else { | |
1960 upper = mid; | |
1961 } | |
1962 | |
1963 // Take giant steps at first (4096, then 256, then 16, then 1) | |
1964 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
1965 const int RADIX = (1 << LOG2_RADIX); | |
1966 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
1967 while ((mid = lower + step) < upper) { | |
1968 assert_LU_OK; | |
1969 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1970 if (mid->pc_offset() < pc_offset) { | |
1971 lower = mid; | |
1972 } else { | |
1973 upper = mid; | |
1974 break; | |
1975 } | |
1976 } | |
1977 assert_LU_OK; | |
1978 } | |
1979 | |
1980 // Sneak up on the value with a linear search of length ~16. | |
1981 while (true) { | |
1982 assert_LU_OK; | |
1983 mid = lower + 1; | |
1984 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1985 if (mid->pc_offset() < pc_offset) { | |
1986 lower = mid; | |
1987 } else { | |
1988 upper = mid; | |
1989 break; | |
1990 } | |
1991 } | |
1992 #undef assert_LU_OK | |
1993 | |
1994 if (match_desc(upper, pc_offset, approximate)) { | |
1995 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
1996 _pc_desc_cache.add_pc_desc(upper); | |
1997 return upper; | |
1998 } else { | |
1999 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2000 return NULL; | |
2001 } | |
2002 } | |
2003 | |
2004 | |
2005 bool nmethod::check_all_dependencies() { | |
2006 bool found_check = false; | |
2007 // wholesale check of all dependencies | |
2008 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2009 if (deps.check_dependency() != NULL) { | |
2010 found_check = true; | |
2011 NOT_DEBUG(break); | |
2012 } | |
2013 } | |
2014 return found_check; // tell caller if we found anything | |
2015 } | |
2016 | |
2017 bool nmethod::check_dependency_on(DepChange& changes) { | |
2018 // What has happened: | |
2019 // 1) a new class dependee has been added | |
2020 // 2) dependee and all its super classes have been marked | |
2021 bool found_check = false; // set true if we are upset | |
2022 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2023 // Evaluate only relevant dependencies. | |
2024 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2025 found_check = true; | |
2026 NOT_DEBUG(break); | |
2027 } | |
2028 } | |
2029 return found_check; | |
2030 } | |
2031 | |
2032 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2033 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2034 objArrayOop dependee_methods = dependee_ik->methods(); | |
2035 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2036 if (deps.type() == Dependencies::evol_method) { | |
2037 methodOop method = deps.method_argument(0); | |
2038 for (int j = 0; j < dependee_methods->length(); j++) { | |
2039 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2040 // RC_TRACE macro has an embedded ResourceMark | |
2041 RC_TRACE(0x01000000, | |
2042 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2043 _method->method_holder()->klass_part()->external_name(), | |
2044 _method->name()->as_C_string(), | |
2045 _method->signature()->as_C_string(), compile_id(), | |
2046 method->method_holder()->klass_part()->external_name(), | |
2047 method->name()->as_C_string(), | |
2048 method->signature()->as_C_string())); | |
2049 if (TraceDependencies || LogCompilation) | |
2050 deps.log_dependency(dependee); | |
2051 return true; | |
2052 } | |
2053 } | |
2054 } | |
2055 } | |
2056 return false; | |
2057 } | |
2058 | |
2059 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2060 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2061 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2062 if (deps.type() != Dependencies::evol_method) | |
2063 continue; | |
2064 methodOop method = deps.method_argument(0); | |
2065 if (method == dependee) return true; | |
2066 } | |
2067 return false; | |
2068 } | |
2069 | |
2070 | |
2071 bool nmethod::is_patchable_at(address instr_addr) { | |
2072 assert (code_contains(instr_addr), "wrong nmethod used"); | |
2073 if (is_zombie()) { | |
2074 // a zombie may never be patched | |
2075 return false; | |
2076 } | |
2077 return true; | |
2078 } | |
2079 | |
2080 | |
2081 address nmethod::continuation_for_implicit_exception(address pc) { | |
2082 // Exception happened outside inline-cache check code => we are inside | |
2083 // an active nmethod => use cpc to determine a return address | |
2084 int exception_offset = pc - instructions_begin(); | |
2085 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); | |
2086 #ifdef ASSERT | |
2087 if (cont_offset == 0) { | |
2088 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2089 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2090 HandleMark hm(thread); | |
2091 ResourceMark rm(thread); | |
2092 CodeBlob* cb = CodeCache::find_blob(pc); | |
2093 assert(cb != NULL && cb == this, ""); | |
2094 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2095 print(); | |
2096 method()->print_codes(); | |
2097 print_code(); | |
2098 print_pcs(); | |
2099 } | |
2100 #endif | |
1250 | 2101 if (cont_offset == 0) { |
2102 // Let the normal error handling report the exception | |
2103 return NULL; | |
2104 } | |
0 | 2105 return instructions_begin() + cont_offset; |
2106 } | |
2107 | |
2108 | |
2109 | |
2110 void nmethod_init() { | |
2111 // make sure you didn't forget to adjust the filler fields | |
2112 assert(sizeof(nmFlags) <= 4, "nmFlags occupies more than a word"); | |
2113 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2114 } | |
2115 | |
2116 | |
2117 //------------------------------------------------------------------------------------------- | |
2118 | |
2119 | |
2120 // QQQ might we make this work from a frame?? | |
2121 nmethodLocker::nmethodLocker(address pc) { | |
2122 CodeBlob* cb = CodeCache::find_blob(pc); | |
2123 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2124 _nm = (nmethod*)cb; | |
2125 lock_nmethod(_nm); | |
2126 } | |
2127 | |
2128 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
2129 if (nm == NULL) return; | |
2130 Atomic::inc(&nm->_lock_count); | |
2131 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
2132 } | |
2133 | |
2134 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2135 if (nm == NULL) return; | |
2136 Atomic::dec(&nm->_lock_count); | |
2137 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2138 } | |
2139 | |
1204 | 2140 |
2141 // ----------------------------------------------------------------------------- | |
2142 // nmethod::get_deopt_original_pc | |
2143 // | |
2144 // Return the original PC for the given PC if: | |
2145 // (a) the given PC belongs to a nmethod and | |
2146 // (b) it is a deopt PC | |
2147 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2148 if (fr->cb() == NULL) return NULL; | |
2149 | |
2150 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2151 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2152 return nm->get_original_pc(fr); | |
2153 | |
2154 return NULL; | |
0 | 2155 } |
2156 | |
2157 | |
2158 // ----------------------------------------------------------------------------- | |
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2159 // MethodHandle |
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2160 |
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2161 bool nmethod::is_method_handle_return(address return_pc) { |
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2162 if (!has_method_handle_invokes()) return false; |
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2163 PcDesc* pd = pc_desc_at(return_pc); |
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2164 if (pd == NULL) |
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2165 return false; |
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2166 return pd->is_method_handle_invoke(); |
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2167 } |
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2168 |
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2169 |
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2170 // ----------------------------------------------------------------------------- |
0 | 2171 // Verification |
2172 | |
989
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2173 class VerifyOopsClosure: public OopClosure { |
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2174 nmethod* _nm; |
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2175 bool _ok; |
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2176 public: |
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2177 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2178 bool ok() { return _ok; } |
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2179 virtual void do_oop(oop* p) { |
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2180 if ((*p) == NULL || (*p)->is_oop()) return; |
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2181 if (_ok) { |
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2182 _nm->print_nmethod(true); |
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2183 _ok = false; |
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2184 } |
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2185 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2186 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2187 } |
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2188 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2189 }; |
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2190 |
0 | 2191 void nmethod::verify() { |
2192 | |
2193 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2194 // seems odd. | |
2195 | |
2196 if( is_zombie() || is_not_entrant() ) | |
2197 return; | |
2198 | |
2199 // Make sure all the entry points are correctly aligned for patching. | |
2200 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2201 | |
2202 assert(method()->is_oop(), "must be valid"); | |
2203 | |
2204 ResourceMark rm; | |
2205 | |
2206 if (!CodeCache::contains(this)) { | |
1490
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2207 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2208 } |
2209 | |
2210 if(is_native_method() ) | |
2211 return; | |
2212 | |
2213 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2214 if (nm != this) { | |
1490
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2215 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2216 this)); |
0 | 2217 } |
2218 | |
2219 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2220 if (! p->verify(this)) { | |
2221 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2222 } | |
2223 } | |
2224 | |
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2225 VerifyOopsClosure voc(this); |
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2226 oops_do(&voc); |
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2227 assert(voc.ok(), "embedded oops must be OK"); |
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2228 verify_scavenge_root_oops(); |
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2229 |
0 | 2230 verify_scopes(); |
2231 } | |
2232 | |
2233 | |
2234 void nmethod::verify_interrupt_point(address call_site) { | |
2235 // This code does not work in release mode since | |
2236 // owns_lock only is available in debug mode. | |
2237 CompiledIC* ic = NULL; | |
2238 Thread *cur = Thread::current(); | |
2239 if (CompiledIC_lock->owner() == cur || | |
2240 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2241 SafepointSynchronize::is_at_safepoint())) { | |
2242 ic = CompiledIC_at(call_site); | |
2243 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2244 } else { | |
2245 MutexLocker ml_verify (CompiledIC_lock); | |
2246 ic = CompiledIC_at(call_site); | |
2247 } | |
2248 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2249 assert(pd != NULL, "PcDesc must exist"); | |
2250 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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2251 pd->obj_decode_offset(), pd->should_reexecute(), |
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2252 pd->return_oop()); |
0 | 2253 !sd->is_top(); sd = sd->sender()) { |
2254 sd->verify(); | |
2255 } | |
2256 } | |
2257 | |
2258 void nmethod::verify_scopes() { | |
2259 if( !method() ) return; // Runtime stubs have no scope | |
2260 if (method()->is_native()) return; // Ignore stub methods. | |
2261 // iterate through all interrupt point | |
2262 // and verify the debug information is valid. | |
2263 RelocIterator iter((nmethod*)this); | |
2264 while (iter.next()) { | |
2265 address stub = NULL; | |
2266 switch (iter.type()) { | |
2267 case relocInfo::virtual_call_type: | |
2268 verify_interrupt_point(iter.addr()); | |
2269 break; | |
2270 case relocInfo::opt_virtual_call_type: | |
2271 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2272 verify_interrupt_point(iter.addr()); | |
2273 break; | |
2274 case relocInfo::static_call_type: | |
2275 stub = iter.static_call_reloc()->static_stub(); | |
2276 //verify_interrupt_point(iter.addr()); | |
2277 break; | |
2278 case relocInfo::runtime_call_type: | |
2279 address destination = iter.reloc()->value(); | |
2280 // Right now there is no way to find out which entries support | |
2281 // an interrupt point. It would be nice if we had this | |
2282 // information in a table. | |
2283 break; | |
2284 } | |
2285 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2286 } | |
2287 } | |
2288 | |
2289 | |
2290 // ----------------------------------------------------------------------------- | |
2291 // Non-product code | |
2292 #ifndef PRODUCT | |
2293 | |
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2294 class DebugScavengeRoot: public OopClosure { |
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2295 nmethod* _nm; |
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2296 bool _ok; |
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2297 public: |
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2298 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2299 bool ok() { return _ok; } |
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2300 virtual void do_oop(oop* p) { |
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2301 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2302 if (_ok) { |
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2303 _nm->print_nmethod(true); |
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2304 _ok = false; |
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2305 } |
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2306 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2307 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2308 (*p)->print(); |
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|
2309 } |
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2310 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2311 }; |
0 | 2312 |
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2313 void nmethod::verify_scavenge_root_oops() { |
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2314 if (!on_scavenge_root_list()) { |
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2315 // Actually look inside, to verify the claim that it's clean. |
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2316 DebugScavengeRoot debug_scavenge_root(this); |
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2317 oops_do(&debug_scavenge_root); |
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2318 if (!debug_scavenge_root.ok()) |
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2319 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2320 } |
989
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2321 assert(scavenge_root_not_marked(), ""); |
0 | 2322 } |
2323 | |
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2324 #endif // PRODUCT |
0 | 2325 |
2326 // Printing operations | |
2327 | |
2328 void nmethod::print() const { | |
2329 ResourceMark rm; | |
2330 ttyLocker ttyl; // keep the following output all in one block | |
2331 | |
2332 tty->print("Compiled "); | |
2333 | |
2334 if (is_compiled_by_c1()) { | |
2335 tty->print("(c1) "); | |
2336 } else if (is_compiled_by_c2()) { | |
2337 tty->print("(c2) "); | |
2338 } else { | |
2339 tty->print("(nm) "); | |
2340 } | |
2341 | |
2342 print_on(tty, "nmethod"); | |
2343 tty->cr(); | |
2344 if (WizardMode) { | |
2345 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2346 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2347 tty->print(" { "); | |
2348 if (version()) tty->print("v%d ", version()); | |
2349 if (is_in_use()) tty->print("in_use "); | |
2350 if (is_not_entrant()) tty->print("not_entrant "); | |
2351 if (is_zombie()) tty->print("zombie "); | |
2352 if (is_unloaded()) tty->print("unloaded "); | |
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2353 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2354 tty->print_cr("}:"); |
2355 } | |
2356 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2357 (address)this, | |
2358 (address)this + size(), | |
2359 size()); | |
2360 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2361 relocation_begin(), | |
2362 relocation_end(), | |
2363 relocation_size()); | |
2364 if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2365 code_begin(), | |
2366 code_end(), | |
2367 code_size()); | |
2368 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2369 stub_begin(), | |
2370 stub_end(), | |
2371 stub_size()); | |
2372 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2373 consts_begin(), | |
2374 consts_end(), | |
2375 consts_size()); | |
1563
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2376 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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2377 oops_begin(), |
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2378 oops_end(), |
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2379 oops_size()); |
0 | 2380 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2381 scopes_data_begin(), | |
2382 scopes_data_end(), | |
2383 scopes_data_size()); | |
2384 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2385 scopes_pcs_begin(), | |
2386 scopes_pcs_end(), | |
2387 scopes_pcs_size()); | |
2388 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2389 dependencies_begin(), | |
2390 dependencies_end(), | |
2391 dependencies_size()); | |
2392 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2393 handler_table_begin(), | |
2394 handler_table_end(), | |
2395 handler_table_size()); | |
2396 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2397 nul_chk_table_begin(), | |
2398 nul_chk_table_end(), | |
2399 nul_chk_table_size()); | |
2400 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2401 oops_begin(), | |
2402 oops_end(), | |
2403 oops_size()); | |
2404 } | |
2405 | |
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2406 void nmethod::print_code() { |
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2407 HandleMark hm; |
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2408 ResourceMark m; |
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2409 Disassembler::decode(this); |
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2410 } |
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2411 |
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2412 |
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2413 #ifndef PRODUCT |
0 | 2414 |
2415 void nmethod::print_scopes() { | |
2416 // Find the first pc desc for all scopes in the code and print it. | |
2417 ResourceMark rm; | |
2418 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2419 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2420 continue; | |
2421 | |
2422 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2423 sd->print_on(tty, p); | |
2424 } | |
2425 } | |
2426 | |
2427 void nmethod::print_dependencies() { | |
2428 ResourceMark rm; | |
2429 ttyLocker ttyl; // keep the following output all in one block | |
2430 tty->print_cr("Dependencies:"); | |
2431 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2432 deps.print_dependency(); | |
2433 klassOop ctxk = deps.context_type(); | |
2434 if (ctxk != NULL) { | |
2435 Klass* k = Klass::cast(ctxk); | |
2436 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2437 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2438 } |
2439 } | |
2440 deps.log_dependency(); // put it into the xml log also | |
2441 } | |
2442 } | |
2443 | |
2444 | |
2445 void nmethod::print_relocations() { | |
2446 ResourceMark m; // in case methods get printed via the debugger | |
2447 tty->print_cr("relocations:"); | |
2448 RelocIterator iter(this); | |
2449 iter.print(); | |
2450 if (UseRelocIndex) { | |
2451 jint* index_end = (jint*)relocation_end() - 1; | |
2452 jint index_size = *index_end; | |
2453 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2454 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2455 if (index_size > 0) { | |
2456 jint* ip; | |
2457 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2458 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2459 ip[0], | |
2460 ip[1], | |
2461 header_end()+ip[0], | |
2462 relocation_begin()-1+ip[1]); | |
2463 for (; ip < index_end; ip++) | |
2464 tty->print_cr(" (%d ?)", ip[0]); | |
2465 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2466 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2467 } | |
2468 } | |
2469 } | |
2470 | |
2471 | |
2472 void nmethod::print_pcs() { | |
2473 ResourceMark m; // in case methods get printed via debugger | |
2474 tty->print_cr("pc-bytecode offsets:"); | |
2475 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2476 p->print(this); | |
2477 } | |
2478 } | |
2479 | |
100
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diff
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|
2480 #endif // PRODUCT |
0 | 2481 |
2482 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2483 RelocIterator iter(this, begin, end); | |
2484 bool have_one = false; | |
2485 while (iter.next()) { | |
2486 have_one = true; | |
2487 switch (iter.type()) { | |
2488 case relocInfo::none: return "no_reloc"; | |
2489 case relocInfo::oop_type: { | |
2490 stringStream st; | |
2491 oop_Relocation* r = iter.oop_reloc(); | |
2492 oop obj = r->oop_value(); | |
2493 st.print("oop("); | |
2494 if (obj == NULL) st.print("NULL"); | |
2495 else obj->print_value_on(&st); | |
2496 st.print(")"); | |
2497 return st.as_string(); | |
2498 } | |
2499 case relocInfo::virtual_call_type: return "virtual_call"; | |
2500 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2501 case relocInfo::static_call_type: return "static_call"; | |
2502 case relocInfo::static_stub_type: return "static_stub"; | |
2503 case relocInfo::runtime_call_type: return "runtime_call"; | |
2504 case relocInfo::external_word_type: return "external_word"; | |
2505 case relocInfo::internal_word_type: return "internal_word"; | |
2506 case relocInfo::section_word_type: return "section_word"; | |
2507 case relocInfo::poll_type: return "poll"; | |
2508 case relocInfo::poll_return_type: return "poll_return"; | |
2509 case relocInfo::type_mask: return "type_bit_mask"; | |
2510 } | |
2511 } | |
2512 return have_one ? "other" : NULL; | |
2513 } | |
2514 | |
2515 // Return a the last scope in (begin..end] | |
2516 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2517 PcDesc* p = pc_desc_near(begin+1); | |
2518 if (p != NULL && p->real_pc(this) <= end) { | |
2519 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
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|
2520 p->obj_decode_offset(), p->should_reexecute(), |
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diff
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|
2521 p->return_oop()); |
0 | 2522 } |
2523 return NULL; | |
2524 } | |
2525 | |
1155
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|
2526 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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|
2527 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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|
2528 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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|
2529 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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|
2530 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2531 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
2532 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); | |
1155
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|
2533 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
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diff
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|
2534 if (block_begin == entry_point()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2535 methodHandle m = method(); |
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changeset
|
2536 if (m.not_null()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2537 stream->print(" # "); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2538 m->print_value_on(stream); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2539 stream->cr(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2540 } |
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diff
changeset
|
2541 if (m.not_null() && !is_osr_method()) { |
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diff
changeset
|
2542 ResourceMark rm; |
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diff
changeset
|
2543 int sizeargs = m->size_of_parameters(); |
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diff
changeset
|
2544 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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diff
changeset
|
2545 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2546 { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2547 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2548 if (!m->is_static()) |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2549 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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1141
diff
changeset
|
2550 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2551 BasicType t = ss.type(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2552 sig_bt[sig_index++] = t; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2553 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2554 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
|
2555 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2556 assert(type2size[t] == 1, "size is 1 or 2"); |
4e6abf09f540
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jrose
parents:
1141
diff
changeset
|
2557 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2558 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2559 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2560 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2561 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2562 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
|
2563 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
|
2564 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
|
2565 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2566 int arg_index = (m->is_static() ? 0 : -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2567 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2568 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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jrose
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1141
diff
changeset
|
2569 bool at_this = (arg_index == -1); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2570 bool at_old_sp = false; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2571 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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jrose
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1141
diff
changeset
|
2572 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
|
2573 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2574 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2575 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2576 stream->print(" # parm%d: ", arg_index); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2577 stream->move_to(tab1); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2578 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2579 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
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1141
diff
changeset
|
2580 if (fst->is_reg()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2581 stream->print("%s", fst->name()); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2582 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2583 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2584 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2585 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2586 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2587 if (offset == stack_slot_offset) at_old_sp = true; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2588 stream->print("[%s+0x%x]", spname, offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2589 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2590 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
4e6abf09f540
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jrose
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diff
changeset
|
2591 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2592 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2593 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2594 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2595 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2596 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2597 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2598 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2599 if (!at_this && ss.is_object()) { |
4e6abf09f540
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diff
changeset
|
2600 symbolOop name = ss.as_symbol_or_null(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2601 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2602 name->print_value_on(stream); |
4e6abf09f540
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jrose
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1141
diff
changeset
|
2603 did_name = true; |
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diff
changeset
|
2604 } |
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1141
diff
changeset
|
2605 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2606 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2607 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2608 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2609 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2610 stream->print(" (%s of caller)", spname); |
4e6abf09f540
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1141
diff
changeset
|
2611 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2612 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2613 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2614 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2615 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2616 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2617 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2618 if (!did_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2619 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2620 stream->move_to(tab1); |
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diff
changeset
|
2621 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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2622 stream->print(" (%s of caller)", spname); |
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2623 stream->cr(); |
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2624 } |
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2625 } |
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2626 } |
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2627 } |
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2628 |
0 | 2629 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2630 // First, find an oopmap in (begin, end]. | |
2631 // We use the odd half-closed interval so that oop maps and scope descs | |
2632 // which are tied to the byte after a call are printed with the call itself. | |
2633 address base = instructions_begin(); | |
2634 OopMapSet* oms = oop_maps(); | |
2635 if (oms != NULL) { | |
2636 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2637 OopMap* om = oms->at(i); | |
2638 address pc = base + om->offset(); | |
2639 if (pc > begin) { | |
2640 if (pc <= end) { | |
100
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2641 st->move_to(column); |
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2642 st->print("; "); |
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2643 om->print_on(st); |
0 | 2644 } |
2645 break; | |
2646 } | |
2647 } | |
2648 } | |
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2649 |
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2650 // Print any debug info present at this pc. |
0 | 2651 ScopeDesc* sd = scope_desc_in(begin, end); |
2652 if (sd != NULL) { | |
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2653 st->move_to(column); |
0 | 2654 if (sd->bci() == SynchronizationEntryBCI) { |
2655 st->print(";*synchronization entry"); | |
2656 } else { | |
2657 if (sd->method().is_null()) { | |
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2658 st->print("method is NULL"); |
0 | 2659 } else if (sd->method()->is_native()) { |
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2660 st->print("method is native"); |
0 | 2661 } else { |
2662 address bcp = sd->method()->bcp_from(sd->bci()); | |
2663 Bytecodes::Code bc = Bytecodes::java_code_at(bcp); | |
2664 st->print(";*%s", Bytecodes::name(bc)); | |
2665 switch (bc) { | |
2666 case Bytecodes::_invokevirtual: | |
2667 case Bytecodes::_invokespecial: | |
2668 case Bytecodes::_invokestatic: | |
2669 case Bytecodes::_invokeinterface: | |
2670 { | |
2671 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci()); | |
2672 st->print(" "); | |
2673 if (invoke->name() != NULL) | |
2674 invoke->name()->print_symbol_on(st); | |
2675 else | |
2676 st->print("<UNKNOWN>"); | |
2677 break; | |
2678 } | |
2679 case Bytecodes::_getfield: | |
2680 case Bytecodes::_putfield: | |
2681 case Bytecodes::_getstatic: | |
2682 case Bytecodes::_putstatic: | |
2683 { | |
1602 | 2684 Bytecode_field* field = Bytecode_field_at(sd->method(), sd->bci()); |
0 | 2685 st->print(" "); |
1602 | 2686 if (field->name() != NULL) |
2687 field->name()->print_symbol_on(st); | |
0 | 2688 else |
2689 st->print("<UNKNOWN>"); | |
2690 } | |
2691 } | |
2692 } | |
2693 } | |
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2694 |
0 | 2695 // Print all scopes |
2696 for (;sd != NULL; sd = sd->sender()) { | |
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2697 st->move_to(column); |
0 | 2698 st->print("; -"); |
2699 if (sd->method().is_null()) { | |
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2700 st->print("method is NULL"); |
0 | 2701 } else { |
2702 sd->method()->print_short_name(st); | |
2703 } | |
2704 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2705 if (lineno != -1) { | |
2706 st->print("@%d (line %d)", sd->bci(), lineno); | |
2707 } else { | |
2708 st->print("@%d", sd->bci()); | |
2709 } | |
2710 st->cr(); | |
2711 } | |
2712 } | |
2713 | |
2714 // Print relocation information | |
2715 const char* str = reloc_string_for(begin, end); | |
2716 if (str != NULL) { | |
2717 if (sd != NULL) st->cr(); | |
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2718 st->move_to(column); |
0 | 2719 st->print("; {%s}", str); |
2720 } | |
2721 int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); | |
2722 if (cont_offset != 0) { | |
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2723 st->move_to(column); |
0 | 2724 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); |
2725 } | |
2726 | |
2727 } | |
2728 | |
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2729 #ifndef PRODUCT |
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2730 |
0 | 2731 void nmethod::print_value_on(outputStream* st) const { |
2732 print_on(st, "nmethod"); | |
2733 } | |
2734 | |
2735 void nmethod::print_calls(outputStream* st) { | |
2736 RelocIterator iter(this); | |
2737 while (iter.next()) { | |
2738 switch (iter.type()) { | |
2739 case relocInfo::virtual_call_type: | |
2740 case relocInfo::opt_virtual_call_type: { | |
2741 VerifyMutexLocker mc(CompiledIC_lock); | |
2742 CompiledIC_at(iter.reloc())->print(); | |
2743 break; | |
2744 } | |
2745 case relocInfo::static_call_type: | |
2746 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2747 compiledStaticCall_at(iter.reloc())->print(); | |
2748 break; | |
2749 } | |
2750 } | |
2751 } | |
2752 | |
2753 void nmethod::print_handler_table() { | |
2754 ExceptionHandlerTable(this).print(); | |
2755 } | |
2756 | |
2757 void nmethod::print_nul_chk_table() { | |
2758 ImplicitExceptionTable(this).print(instructions_begin()); | |
2759 } | |
2760 | |
2761 void nmethod::print_statistics() { | |
2762 ttyLocker ttyl; | |
2763 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2764 nmethod_stats.print_native_nmethod_stats(); | |
2765 nmethod_stats.print_nmethod_stats(); | |
2766 DebugInformationRecorder::print_statistics(); | |
2767 nmethod_stats.print_pc_stats(); | |
2768 Dependencies::print_statistics(); | |
2769 if (xtty != NULL) xtty->tail("statistics"); | |
2770 } | |
2771 | |
2772 #endif // PRODUCT |