Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 2142:8012aa3ccede
4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed
author | never |
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date | Thu, 13 Jan 2011 22:15:41 -0800 |
parents | 5a1e52a439fa |
children | 3582bf76420e |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, 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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "code/compiledIC.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/scopeDesc.hpp" | |
30 #include "compiler/abstractCompiler.hpp" | |
31 #include "compiler/compileLog.hpp" | |
32 #include "compiler/compilerOracle.hpp" | |
33 #include "compiler/disassembler.hpp" | |
34 #include "interpreter/bytecode.hpp" | |
35 #include "oops/methodDataOop.hpp" | |
36 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
37 #include "runtime/sharedRuntime.hpp" | |
38 #include "runtime/sweeper.hpp" | |
39 #include "utilities/dtrace.hpp" | |
40 #include "utilities/events.hpp" | |
41 #include "utilities/xmlstream.hpp" | |
42 #ifdef SHARK | |
43 #include "shark/sharkCompiler.hpp" | |
44 #endif | |
0 | 45 |
46 #ifdef DTRACE_ENABLED | |
47 | |
48 // Only bother with this argument setup if dtrace is available | |
49 | |
50 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
51 const char*, int, const char*, int, const char*, int, void*, size_t); | |
52 | |
53 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
54 char*, int, char*, int, char*, int); | |
55 | |
56 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
57 { \ | |
58 methodOop m = (method); \ | |
59 if (m != NULL) { \ | |
60 symbolOop klass_name = m->klass_name(); \ | |
61 symbolOop name = m->name(); \ | |
62 symbolOop signature = m->signature(); \ | |
63 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ | |
64 klass_name->bytes(), klass_name->utf8_length(), \ | |
65 name->bytes(), name->utf8_length(), \ | |
66 signature->bytes(), signature->utf8_length()); \ | |
67 } \ | |
68 } | |
69 | |
70 #else // ndef DTRACE_ENABLED | |
71 | |
72 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
73 | |
74 #endif | |
75 | |
76 bool nmethod::is_compiled_by_c1() const { | |
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77 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 78 if (is_native_method()) return false; |
79 return compiler()->is_c1(); | |
80 } | |
81 bool nmethod::is_compiled_by_c2() const { | |
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82 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 83 if (is_native_method()) return false; |
84 return compiler()->is_c2(); | |
85 } | |
1692 | 86 bool nmethod::is_compiled_by_shark() const { |
87 if (is_native_method()) return false; | |
88 assert(compiler() != NULL, "must be"); | |
89 return compiler()->is_shark(); | |
90 } | |
0 | 91 |
92 | |
93 | |
94 //--------------------------------------------------------------------------------- | |
95 // NMethod statistics | |
96 // They are printed under various flags, including: | |
97 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
98 // (In the latter two cases, they like other stats are printed to the log only.) | |
99 | |
100 #ifndef PRODUCT | |
101 // These variables are put into one block to reduce relocations | |
102 // and make it simpler to print from the debugger. | |
103 static | |
104 struct nmethod_stats_struct { | |
105 int nmethod_count; | |
106 int total_size; | |
107 int relocation_size; | |
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108 int consts_size; |
1748 | 109 int insts_size; |
0 | 110 int stub_size; |
111 int scopes_data_size; | |
112 int scopes_pcs_size; | |
113 int dependencies_size; | |
114 int handler_table_size; | |
115 int nul_chk_table_size; | |
116 int oops_size; | |
117 | |
118 void note_nmethod(nmethod* nm) { | |
119 nmethod_count += 1; | |
120 total_size += nm->size(); | |
121 relocation_size += nm->relocation_size(); | |
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122 consts_size += nm->consts_size(); |
1748 | 123 insts_size += nm->insts_size(); |
0 | 124 stub_size += nm->stub_size(); |
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125 oops_size += nm->oops_size(); |
0 | 126 scopes_data_size += nm->scopes_data_size(); |
127 scopes_pcs_size += nm->scopes_pcs_size(); | |
128 dependencies_size += nm->dependencies_size(); | |
129 handler_table_size += nm->handler_table_size(); | |
130 nul_chk_table_size += nm->nul_chk_table_size(); | |
131 } | |
132 void print_nmethod_stats() { | |
133 if (nmethod_count == 0) return; | |
134 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
135 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
136 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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137 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 138 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 139 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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140 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 141 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
142 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
143 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
144 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
145 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
146 } | |
147 | |
148 int native_nmethod_count; | |
149 int native_total_size; | |
150 int native_relocation_size; | |
1748 | 151 int native_insts_size; |
0 | 152 int native_oops_size; |
153 void note_native_nmethod(nmethod* nm) { | |
154 native_nmethod_count += 1; | |
155 native_total_size += nm->size(); | |
156 native_relocation_size += nm->relocation_size(); | |
1748 | 157 native_insts_size += nm->insts_size(); |
0 | 158 native_oops_size += nm->oops_size(); |
159 } | |
160 void print_native_nmethod_stats() { | |
161 if (native_nmethod_count == 0) return; | |
162 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
163 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
164 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 165 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 166 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
167 } | |
168 | |
169 int pc_desc_resets; // number of resets (= number of caches) | |
170 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
171 int pc_desc_approx; // number of those which have approximate true | |
172 int pc_desc_repeats; // number of _last_pc_desc hits | |
173 int pc_desc_hits; // number of LRU cache hits | |
174 int pc_desc_tests; // total number of PcDesc examinations | |
175 int pc_desc_searches; // total number of quasi-binary search steps | |
176 int pc_desc_adds; // number of LUR cache insertions | |
177 | |
178 void print_pc_stats() { | |
179 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
180 pc_desc_queries, | |
181 (double)(pc_desc_tests + pc_desc_searches) | |
182 / pc_desc_queries); | |
183 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
184 pc_desc_resets, | |
185 pc_desc_queries, pc_desc_approx, | |
186 pc_desc_repeats, pc_desc_hits, | |
187 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
188 } | |
189 } nmethod_stats; | |
190 #endif //PRODUCT | |
191 | |
192 //--------------------------------------------------------------------------------- | |
193 | |
194 | |
195 // The _unwind_handler is a special marker address, which says that | |
196 // for given exception oop and address, the frame should be removed | |
197 // as the tuple cannot be caught in the nmethod | |
198 address ExceptionCache::_unwind_handler = (address) -1; | |
199 | |
200 | |
201 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
202 assert(pc != NULL, "Must be non null"); | |
203 assert(exception.not_null(), "Must be non null"); | |
204 assert(handler != NULL, "Must be non null"); | |
205 | |
206 _count = 0; | |
207 _exception_type = exception->klass(); | |
208 _next = NULL; | |
209 | |
210 add_address_and_handler(pc,handler); | |
211 } | |
212 | |
213 | |
214 address ExceptionCache::match(Handle exception, address pc) { | |
215 assert(pc != NULL,"Must be non null"); | |
216 assert(exception.not_null(),"Must be non null"); | |
217 if (exception->klass() == exception_type()) { | |
218 return (test_address(pc)); | |
219 } | |
220 | |
221 return NULL; | |
222 } | |
223 | |
224 | |
225 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
226 assert(exception.not_null(),"Must be non null"); | |
227 if (exception->klass() == exception_type() && count() < cache_size) { | |
228 return true; | |
229 } | |
230 return false; | |
231 } | |
232 | |
233 | |
234 address ExceptionCache::test_address(address addr) { | |
235 for (int i=0; i<count(); i++) { | |
236 if (pc_at(i) == addr) { | |
237 return handler_at(i); | |
238 } | |
239 } | |
240 return NULL; | |
241 } | |
242 | |
243 | |
244 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
245 if (test_address(addr) == handler) return true; | |
246 if (count() < cache_size) { | |
247 set_pc_at(count(),addr); | |
248 set_handler_at(count(), handler); | |
249 increment_count(); | |
250 return true; | |
251 } | |
252 return false; | |
253 } | |
254 | |
255 | |
256 // private method for handling exception cache | |
257 // These methods are private, and used to manipulate the exception cache | |
258 // directly. | |
259 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
260 ExceptionCache* ec = exception_cache(); | |
261 while (ec != NULL) { | |
262 if (ec->match_exception_with_space(exception)) { | |
263 return ec; | |
264 } | |
265 ec = ec->next(); | |
266 } | |
267 return NULL; | |
268 } | |
269 | |
270 | |
271 //----------------------------------------------------------------------------- | |
272 | |
273 | |
274 // Helper used by both find_pc_desc methods. | |
275 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
276 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
277 if (!approximate) | |
278 return pc->pc_offset() == pc_offset; | |
279 else | |
280 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
281 } | |
282 | |
283 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
284 if (initial_pc_desc == NULL) { | |
285 _last_pc_desc = NULL; // native method | |
286 return; | |
287 } | |
288 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
289 // reset the cache by filling it with benign (non-null) values | |
290 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
291 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
292 for (int i = 0; i < cache_size; i++) | |
293 _pc_descs[i] = initial_pc_desc; | |
294 } | |
295 | |
296 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
297 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
298 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
299 | |
300 // In order to prevent race conditions do not load cache elements | |
301 // repeatedly, but use a local copy: | |
302 PcDesc* res; | |
303 | |
304 // Step one: Check the most recently returned value. | |
305 res = _last_pc_desc; | |
306 if (res == NULL) return NULL; // native method; no PcDescs at all | |
307 if (match_desc(res, pc_offset, approximate)) { | |
308 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
309 return res; | |
310 } | |
311 | |
312 // Step two: Check the LRU cache. | |
313 for (int i = 0; i < cache_size; i++) { | |
314 res = _pc_descs[i]; | |
315 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
316 if (match_desc(res, pc_offset, approximate)) { | |
317 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
318 _last_pc_desc = res; // record this cache hit in case of repeat | |
319 return res; | |
320 } | |
321 } | |
322 | |
323 // Report failure. | |
324 return NULL; | |
325 } | |
326 | |
327 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
328 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
329 // Update the LRU cache by shifting pc_desc forward: | |
330 for (int i = 0; i < cache_size; i++) { | |
331 PcDesc* next = _pc_descs[i]; | |
332 _pc_descs[i] = pc_desc; | |
333 pc_desc = next; | |
334 } | |
335 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
336 } | |
337 | |
338 // adjust pcs_size so that it is a multiple of both oopSize and | |
339 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
340 // of oopSize, then 2*sizeof(PcDesc) is) | |
341 static int adjust_pcs_size(int pcs_size) { | |
342 int nsize = round_to(pcs_size, oopSize); | |
343 if ((nsize % sizeof(PcDesc)) != 0) { | |
344 nsize = pcs_size + sizeof(PcDesc); | |
345 } | |
346 assert((nsize % oopSize) == 0, "correct alignment"); | |
347 return nsize; | |
348 } | |
349 | |
350 //----------------------------------------------------------------------------- | |
351 | |
352 | |
353 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
354 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
355 assert(new_entry != NULL,"Must be non null"); | |
356 assert(new_entry->next() == NULL, "Must be null"); | |
357 | |
358 if (exception_cache() != NULL) { | |
359 new_entry->set_next(exception_cache()); | |
360 } | |
361 set_exception_cache(new_entry); | |
362 } | |
363 | |
364 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
365 ExceptionCache* prev = NULL; | |
366 ExceptionCache* curr = exception_cache(); | |
367 assert(curr != NULL, "nothing to remove"); | |
368 // find the previous and next entry of ec | |
369 while (curr != ec) { | |
370 prev = curr; | |
371 curr = curr->next(); | |
372 assert(curr != NULL, "ExceptionCache not found"); | |
373 } | |
374 // now: curr == ec | |
375 ExceptionCache* next = curr->next(); | |
376 if (prev == NULL) { | |
377 set_exception_cache(next); | |
378 } else { | |
379 prev->set_next(next); | |
380 } | |
381 delete curr; | |
382 } | |
383 | |
384 | |
385 // public method for accessing the exception cache | |
386 // These are the public access methods. | |
387 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
388 // We never grab a lock to read the exception cache, so we may | |
389 // have false negatives. This is okay, as it can only happen during | |
390 // the first few exception lookups for a given nmethod. | |
391 ExceptionCache* ec = exception_cache(); | |
392 while (ec != NULL) { | |
393 address ret_val; | |
394 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
395 return ret_val; | |
396 } | |
397 ec = ec->next(); | |
398 } | |
399 return NULL; | |
400 } | |
401 | |
402 | |
403 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
404 // There are potential race conditions during exception cache updates, so we | |
405 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 406 // we don't lock during reads, it is possible to have several threads attempt |
0 | 407 // to update the cache with the same data. We need to check for already inserted |
408 // copies of the current data before adding it. | |
409 | |
410 MutexLocker ml(ExceptionCache_lock); | |
411 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
412 | |
413 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
414 target_entry = new ExceptionCache(exception,pc,handler); | |
415 add_exception_cache_entry(target_entry); | |
416 } | |
417 } | |
418 | |
419 | |
420 //-------------end of code for ExceptionCache-------------- | |
421 | |
422 | |
423 int nmethod::total_size() const { | |
424 return | |
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425 consts_size() + |
1748 | 426 insts_size() + |
0 | 427 stub_size() + |
428 scopes_data_size() + | |
429 scopes_pcs_size() + | |
430 handler_table_size() + | |
431 nul_chk_table_size(); | |
432 } | |
433 | |
434 const char* nmethod::compile_kind() const { | |
435 if (is_osr_method()) return "osr"; | |
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436 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 437 return NULL; |
438 } | |
439 | |
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440 // Fill in default values for various flag fields |
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441 void nmethod::init_defaults() { |
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442 _state = alive; |
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443 _marked_for_reclamation = 0; |
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444 _has_flushed_dependencies = 0; |
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445 _speculatively_disconnected = 0; |
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446 _has_unsafe_access = 0; |
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447 _has_method_handle_invokes = 0; |
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448 _marked_for_deoptimization = 0; |
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449 _lock_count = 0; |
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450 _stack_traversal_mark = 0; |
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451 _unload_reported = false; // jvmti state |
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452 |
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453 NOT_PRODUCT(_has_debug_info = false); |
1726 | 454 #ifdef ASSERT |
455 _oops_are_stale = false; | |
456 #endif | |
457 | |
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458 _oops_do_mark_link = NULL; |
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459 _jmethod_id = NULL; |
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460 _osr_link = NULL; |
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461 _scavenge_root_link = NULL; |
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462 _scavenge_root_state = 0; |
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463 _saved_nmethod_link = NULL; |
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464 _compiler = NULL; |
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465 |
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466 #ifdef HAVE_DTRACE_H |
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467 _trap_offset = 0; |
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468 #endif // def HAVE_DTRACE_H |
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469 } |
0 | 470 |
471 | |
472 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
473 CodeBuffer *code_buffer, | |
474 int vep_offset, | |
475 int frame_complete, | |
476 int frame_size, | |
477 ByteSize basic_lock_owner_sp_offset, | |
478 ByteSize basic_lock_sp_offset, | |
479 OopMapSet* oop_maps) { | |
480 // create nmethod | |
481 nmethod* nm = NULL; | |
482 { | |
483 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
484 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
485 CodeOffsets offsets; | |
486 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
487 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
488 nm = new (native_nmethod_size) | |
489 nmethod(method(), native_nmethod_size, &offsets, | |
490 code_buffer, frame_size, | |
491 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
492 oop_maps); | |
493 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
494 if (PrintAssembly && nm != NULL) | |
495 Disassembler::decode(nm); | |
496 } | |
497 // verify nmethod | |
498 debug_only(if (nm) nm->verify();) // might block | |
499 | |
500 if (nm != NULL) { | |
501 nm->log_new_nmethod(); | |
502 } | |
503 | |
504 return nm; | |
505 } | |
506 | |
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507 #ifdef HAVE_DTRACE_H |
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508 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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509 CodeBuffer *code_buffer, |
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510 int vep_offset, |
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511 int trap_offset, |
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512 int frame_complete, |
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513 int frame_size) { |
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514 // create nmethod |
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515 nmethod* nm = NULL; |
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516 { |
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517 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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518 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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519 CodeOffsets offsets; |
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520 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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521 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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522 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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523 |
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524 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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525 |
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526 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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527 if (PrintAssembly && nm != NULL) |
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528 Disassembler::decode(nm); |
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529 } |
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530 // verify nmethod |
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531 debug_only(if (nm) nm->verify();) // might block |
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532 |
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533 if (nm != NULL) { |
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534 nm->log_new_nmethod(); |
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535 } |
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536 |
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537 return nm; |
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538 } |
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539 |
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540 #endif // def HAVE_DTRACE_H |
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541 |
0 | 542 nmethod* nmethod::new_nmethod(methodHandle method, |
543 int compile_id, | |
544 int entry_bci, | |
545 CodeOffsets* offsets, | |
546 int orig_pc_offset, | |
547 DebugInformationRecorder* debug_info, | |
548 Dependencies* dependencies, | |
549 CodeBuffer* code_buffer, int frame_size, | |
550 OopMapSet* oop_maps, | |
551 ExceptionHandlerTable* handler_table, | |
552 ImplicitExceptionTable* nul_chk_table, | |
553 AbstractCompiler* compiler, | |
554 int comp_level | |
555 ) | |
556 { | |
557 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
558 // create nmethod | |
559 nmethod* nm = NULL; | |
560 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
561 int nmethod_size = | |
562 allocation_size(code_buffer, sizeof(nmethod)) | |
563 + adjust_pcs_size(debug_info->pcs_size()) | |
564 + round_to(dependencies->size_in_bytes() , oopSize) | |
565 + round_to(handler_table->size_in_bytes(), oopSize) | |
566 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
567 + round_to(debug_info->data_size() , oopSize); | |
568 nm = new (nmethod_size) | |
569 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
570 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
571 oop_maps, | |
572 handler_table, | |
573 nul_chk_table, | |
574 compiler, | |
575 comp_level); | |
576 if (nm != NULL) { | |
577 // To make dependency checking during class loading fast, record | |
578 // the nmethod dependencies in the classes it is dependent on. | |
579 // This allows the dependency checking code to simply walk the | |
580 // class hierarchy above the loaded class, checking only nmethods | |
581 // which are dependent on those classes. The slow way is to | |
582 // check every nmethod for dependencies which makes it linear in | |
583 // the number of methods compiled. For applications with a lot | |
584 // classes the slow way is too slow. | |
585 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
586 klassOop klass = deps.context_type(); | |
587 if (klass == NULL) continue; // ignore things like evol_method | |
588 | |
589 // record this nmethod as dependent on this klass | |
590 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
591 } | |
592 } | |
593 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
594 if (PrintAssembly && nm != NULL) | |
595 Disassembler::decode(nm); | |
596 } | |
597 | |
598 // verify nmethod | |
599 debug_only(if (nm) nm->verify();) // might block | |
600 | |
601 if (nm != NULL) { | |
602 nm->log_new_nmethod(); | |
603 } | |
604 | |
605 // done | |
606 return nm; | |
607 } | |
608 | |
609 | |
610 // For native wrappers | |
611 nmethod::nmethod( | |
612 methodOop method, | |
613 int nmethod_size, | |
614 CodeOffsets* offsets, | |
615 CodeBuffer* code_buffer, | |
616 int frame_size, | |
617 ByteSize basic_lock_owner_sp_offset, | |
618 ByteSize basic_lock_sp_offset, | |
619 OopMapSet* oop_maps ) | |
620 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
621 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 622 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
623 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 624 { |
625 { | |
626 debug_only(No_Safepoint_Verifier nsv;) | |
627 assert_locked_or_safepoint(CodeCache_lock); | |
628 | |
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629 init_defaults(); |
0 | 630 _method = method; |
631 _entry_bci = InvocationEntryBci; | |
632 // We have no exception handler or deopt handler make the | |
633 // values something that will never match a pc like the nmethod vtable entry | |
634 _exception_offset = 0; | |
635 _deoptimize_offset = 0; | |
1204 | 636 _deoptimize_mh_offset = 0; |
0 | 637 _orig_pc_offset = 0; |
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638 |
1748 | 639 _consts_offset = data_offset(); |
0 | 640 _stub_offset = data_offset(); |
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641 _oops_offset = data_offset(); |
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642 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 643 _scopes_pcs_offset = _scopes_data_offset; |
644 _dependencies_offset = _scopes_pcs_offset; | |
645 _handler_table_offset = _dependencies_offset; | |
646 _nul_chk_table_offset = _handler_table_offset; | |
647 _nmethod_end_offset = _nul_chk_table_offset; | |
648 _compile_id = 0; // default | |
649 _comp_level = CompLevel_none; | |
1748 | 650 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
651 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 652 _osr_entry_point = NULL; |
653 _exception_cache = NULL; | |
654 _pc_desc_cache.reset_to(NULL); | |
655 | |
656 code_buffer->copy_oops_to(this); | |
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657 debug_only(verify_scavenge_root_oops()); |
0 | 658 CodeCache::commit(this); |
659 } | |
660 | |
661 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
662 ttyLocker ttyl; // keep the following output all in one block | |
663 // This output goes directly to the tty, not the compiler log. | |
664 // To enable tools to match it up with the compilation activity, | |
665 // be sure to tag this tty output with the compile ID. | |
666 if (xtty != NULL) { | |
667 xtty->begin_head("print_native_nmethod"); | |
668 xtty->method(_method); | |
669 xtty->stamp(); | |
670 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
671 } | |
672 // print the header part first | |
673 print(); | |
674 // then print the requested information | |
675 if (PrintNativeNMethods) { | |
676 print_code(); | |
677 oop_maps->print(); | |
678 } | |
679 if (PrintRelocations) { | |
680 print_relocations(); | |
681 } | |
682 if (xtty != NULL) { | |
683 xtty->tail("print_native_nmethod"); | |
684 } | |
685 } | |
686 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
687 } | |
688 | |
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689 // For dtrace wrappers |
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690 #ifdef HAVE_DTRACE_H |
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691 nmethod::nmethod( |
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692 methodOop method, |
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693 int nmethod_size, |
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694 CodeOffsets* offsets, |
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695 CodeBuffer* code_buffer, |
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696 int frame_size) |
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697 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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698 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 699 _native_receiver_sp_offset(in_ByteSize(-1)), |
700 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
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701 { |
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702 { |
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703 debug_only(No_Safepoint_Verifier nsv;) |
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704 assert_locked_or_safepoint(CodeCache_lock); |
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705 |
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706 init_defaults(); |
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707 _method = method; |
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708 _entry_bci = InvocationEntryBci; |
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709 // We have no exception handler or deopt handler make the |
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710 // values something that will never match a pc like the nmethod vtable entry |
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711 _exception_offset = 0; |
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712 _deoptimize_offset = 0; |
1204 | 713 _deoptimize_mh_offset = 0; |
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714 _unwind_handler_offset = -1; |
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715 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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716 _orig_pc_offset = 0; |
1748 | 717 _consts_offset = data_offset(); |
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718 _stub_offset = data_offset(); |
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719 _oops_offset = data_offset(); |
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720 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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721 _scopes_pcs_offset = _scopes_data_offset; |
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722 _dependencies_offset = _scopes_pcs_offset; |
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723 _handler_table_offset = _dependencies_offset; |
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724 _nul_chk_table_offset = _handler_table_offset; |
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725 _nmethod_end_offset = _nul_chk_table_offset; |
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726 _compile_id = 0; // default |
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727 _comp_level = CompLevel_none; |
1748 | 728 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
729 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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730 _osr_entry_point = NULL; |
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731 _exception_cache = NULL; |
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732 _pc_desc_cache.reset_to(NULL); |
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733 |
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734 code_buffer->copy_oops_to(this); |
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735 debug_only(verify_scavenge_root_oops()); |
116
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736 CodeCache::commit(this); |
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737 } |
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738 |
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739 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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740 ttyLocker ttyl; // keep the following output all in one block |
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741 // This output goes directly to the tty, not the compiler log. |
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742 // To enable tools to match it up with the compilation activity, |
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743 // be sure to tag this tty output with the compile ID. |
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744 if (xtty != NULL) { |
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745 xtty->begin_head("print_dtrace_nmethod"); |
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746 xtty->method(_method); |
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747 xtty->stamp(); |
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748 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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749 } |
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750 // print the header part first |
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751 print(); |
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752 // then print the requested information |
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753 if (PrintNMethods) { |
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754 print_code(); |
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755 } |
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756 if (PrintRelocations) { |
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757 print_relocations(); |
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758 } |
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759 if (xtty != NULL) { |
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760 xtty->tail("print_dtrace_nmethod"); |
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761 } |
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762 } |
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763 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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764 } |
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765 #endif // def HAVE_DTRACE_H |
0 | 766 |
767 void* nmethod::operator new(size_t size, int nmethod_size) { | |
768 // Always leave some room in the CodeCache for I2C/C2I adapters | |
769 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
770 return CodeCache::allocate(nmethod_size); | |
771 } | |
772 | |
773 | |
774 nmethod::nmethod( | |
775 methodOop method, | |
776 int nmethod_size, | |
777 int compile_id, | |
778 int entry_bci, | |
779 CodeOffsets* offsets, | |
780 int orig_pc_offset, | |
781 DebugInformationRecorder* debug_info, | |
782 Dependencies* dependencies, | |
783 CodeBuffer *code_buffer, | |
784 int frame_size, | |
785 OopMapSet* oop_maps, | |
786 ExceptionHandlerTable* handler_table, | |
787 ImplicitExceptionTable* nul_chk_table, | |
788 AbstractCompiler* compiler, | |
789 int comp_level | |
790 ) | |
791 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
792 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 793 _native_receiver_sp_offset(in_ByteSize(-1)), |
794 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 795 { |
796 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
797 { | |
798 debug_only(No_Safepoint_Verifier nsv;) | |
799 assert_locked_or_safepoint(CodeCache_lock); | |
800 | |
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801 init_defaults(); |
0 | 802 _method = method; |
1644
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803 _entry_bci = entry_bci; |
0 | 804 _compile_id = compile_id; |
805 _comp_level = comp_level; | |
806 _compiler = compiler; | |
807 _orig_pc_offset = orig_pc_offset; | |
1748 | 808 |
809 // Section offsets | |
1762
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810 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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811 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 812 |
813 // Exception handler and deopt handler are in the stub section | |
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814 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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815 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 816 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
817 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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818 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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819 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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820 } else { |
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821 _deoptimize_mh_offset = -1; |
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822 } |
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823 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 824 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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825 } else { |
1748 | 826 _unwind_handler_offset = -1; |
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827 } |
1748 | 828 |
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829 _oops_offset = data_offset(); |
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830 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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831 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 832 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
833 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
834 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
835 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
836 | |
1748 | 837 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
838 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
839 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 840 _exception_cache = NULL; |
841 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
842 | |
843 // Copy contents of ScopeDescRecorder to nmethod | |
844 code_buffer->copy_oops_to(this); | |
845 debug_info->copy_to(this); | |
846 dependencies->copy_to(this); | |
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847 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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848 CodeCache::add_scavenge_root_nmethod(this); |
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849 } |
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850 debug_only(verify_scavenge_root_oops()); |
0 | 851 |
852 CodeCache::commit(this); | |
853 | |
854 // Copy contents of ExceptionHandlerTable to nmethod | |
855 handler_table->copy_to(this); | |
856 nul_chk_table->copy_to(this); | |
857 | |
858 // we use the information of entry points to find out if a method is | |
859 // static or non static | |
860 assert(compiler->is_c2() || | |
861 _method->is_static() == (entry_point() == _verified_entry_point), | |
862 " entry points must be same for static methods and vice versa"); | |
863 } | |
864 | |
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865 bool printnmethods = PrintNMethods |
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866 || CompilerOracle::should_print(_method) |
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867 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 868 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
869 print_nmethod(printnmethods); | |
870 } | |
871 | |
872 // Note: Do not verify in here as the CodeCache_lock is | |
873 // taken which would conflict with the CompiledIC_lock | |
874 // which taken during the verification of call sites. | |
875 // (was bug - gri 10/25/99) | |
876 | |
877 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
878 } | |
879 | |
880 | |
881 // Print a short set of xml attributes to identify this nmethod. The | |
882 // output should be embedded in some other element. | |
883 void nmethod::log_identity(xmlStream* log) const { | |
884 log->print(" compile_id='%d'", compile_id()); | |
885 const char* nm_kind = compile_kind(); | |
886 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
887 if (compiler() != NULL) { | |
888 log->print(" compiler='%s'", compiler()->name()); | |
889 } | |
1783 | 890 if (TieredCompilation) { |
891 log->print(" level='%d'", comp_level()); | |
892 } | |
0 | 893 } |
894 | |
895 | |
896 #define LOG_OFFSET(log, name) \ | |
897 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
898 log->print(" " XSTR(name) "_offset='%d'" , \ | |
899 (intptr_t)name##_begin() - (intptr_t)this) | |
900 | |
901 | |
902 void nmethod::log_new_nmethod() const { | |
903 if (LogCompilation && xtty != NULL) { | |
904 ttyLocker ttyl; | |
905 HandleMark hm; | |
906 xtty->begin_elem("nmethod"); | |
907 log_identity(xtty); | |
1748 | 908 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 909 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
910 | |
911 LOG_OFFSET(xtty, relocation); | |
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912 LOG_OFFSET(xtty, consts); |
1748 | 913 LOG_OFFSET(xtty, insts); |
0 | 914 LOG_OFFSET(xtty, stub); |
915 LOG_OFFSET(xtty, scopes_data); | |
916 LOG_OFFSET(xtty, scopes_pcs); | |
917 LOG_OFFSET(xtty, dependencies); | |
918 LOG_OFFSET(xtty, handler_table); | |
919 LOG_OFFSET(xtty, nul_chk_table); | |
920 LOG_OFFSET(xtty, oops); | |
921 | |
922 xtty->method(method()); | |
923 xtty->stamp(); | |
924 xtty->end_elem(); | |
925 } | |
926 } | |
927 | |
928 #undef LOG_OFFSET | |
929 | |
930 | |
1783 | 931 void nmethod::print_compilation(outputStream *st, const char *method_name, const char *title, |
932 methodOop method, bool is_blocking, int compile_id, int bci, int comp_level) { | |
933 bool is_synchronized = false, has_xhandler = false, is_native = false; | |
934 int code_size = -1; | |
935 if (method != NULL) { | |
936 is_synchronized = method->is_synchronized(); | |
937 has_xhandler = method->has_exception_handler(); | |
938 is_native = method->is_native(); | |
939 code_size = method->code_size(); | |
940 } | |
941 // print compilation number | |
942 st->print("%7d %3d", (int)tty->time_stamp().milliseconds(), compile_id); | |
943 | |
944 // print method attributes | |
945 const bool is_osr = bci != InvocationEntryBci; | |
946 const char blocking_char = is_blocking ? 'b' : ' '; | |
947 const char compile_type = is_osr ? '%' : ' '; | |
948 const char sync_char = is_synchronized ? 's' : ' '; | |
949 const char exception_char = has_xhandler ? '!' : ' '; | |
950 const char native_char = is_native ? 'n' : ' '; | |
951 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); | |
952 if (TieredCompilation) { | |
953 st->print("%d ", comp_level); | |
954 } | |
955 | |
956 // print optional title | |
957 bool do_nl = false; | |
958 if (title != NULL) { | |
959 int tlen = (int) strlen(title); | |
960 bool do_nl = false; | |
961 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } | |
962 st->print("%.*s", tlen, title); | |
963 } else { | |
964 do_nl = true; | |
965 } | |
966 | |
967 // print method name string if given | |
968 if (method_name != NULL) { | |
969 st->print(method_name); | |
970 } else { | |
971 // otherwise as the method to print itself | |
972 if (method != NULL && !Universe::heap()->is_gc_active()) { | |
973 method->print_short_name(st); | |
974 } else { | |
975 st->print("(method)"); | |
976 } | |
977 } | |
978 | |
979 if (method != NULL) { | |
980 // print osr_bci if any | |
981 if (is_osr) st->print(" @ %d", bci); | |
982 // print method size | |
983 st->print(" (%d bytes)", code_size); | |
984 } | |
985 if (do_nl) st->cr(); | |
986 } | |
987 | |
0 | 988 // Print out more verbose output usually for a newly created nmethod. |
989 void nmethod::print_on(outputStream* st, const char* title) const { | |
990 if (st != NULL) { | |
991 ttyLocker ttyl; | |
1783 | 992 print_compilation(st, /*method_name*/NULL, title, |
993 method(), /*is_blocking*/false, | |
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994 compile_id(), |
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995 is_osr_method() ? osr_entry_bci() : InvocationEntryBci, |
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996 comp_level()); |
0 | 997 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
998 } | |
999 } | |
1000 | |
1001 | |
1002 void nmethod::print_nmethod(bool printmethod) { | |
1003 ttyLocker ttyl; // keep the following output all in one block | |
1004 if (xtty != NULL) { | |
1005 xtty->begin_head("print_nmethod"); | |
1006 xtty->stamp(); | |
1007 xtty->end_head(); | |
1008 } | |
1009 // print the header part first | |
1010 print(); | |
1011 // then print the requested information | |
1012 if (printmethod) { | |
1013 print_code(); | |
1014 print_pcs(); | |
1015 oop_maps()->print(); | |
1016 } | |
1017 if (PrintDebugInfo) { | |
1018 print_scopes(); | |
1019 } | |
1020 if (PrintRelocations) { | |
1021 print_relocations(); | |
1022 } | |
1023 if (PrintDependencies) { | |
1024 print_dependencies(); | |
1025 } | |
1026 if (PrintExceptionHandlers) { | |
1027 print_handler_table(); | |
1028 print_nul_chk_table(); | |
1029 } | |
1030 if (xtty != NULL) { | |
1031 xtty->tail("print_nmethod"); | |
1032 } | |
1033 } | |
1034 | |
1035 | |
1563
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1036 // Promote one word from an assembly-time handle to a live embedded oop. |
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1037 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1038 if (handle == NULL || |
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1039 // As a special case, IC oops are initialized to 1 or -1. |
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1040 handle == (jobject) Universe::non_oop_word()) { |
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1041 (*dest) = (oop) handle; |
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1042 } else { |
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1043 (*dest) = JNIHandles::resolve_non_null(handle); |
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1044 } |
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1045 } |
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1046 |
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1047 |
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1048 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1049 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1050 int length = array->length(); |
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1051 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1052 oop* dest = oops_begin(); |
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1053 for (int index = 0 ; index < length; index++) { |
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1054 initialize_immediate_oop(&dest[index], array->at(index)); |
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1055 } |
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1056 |
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1057 // Now we can fix up all the oops in the code. We need to do this |
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1058 // in the code because the assembler uses jobjects as placeholders. |
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1059 // The code and relocations have already been initialized by the |
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1060 // CodeBlob constructor, so it is valid even at this early point to |
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1061 // iterate over relocations and patch the code. |
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1062 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1063 } |
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1064 |
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1065 |
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1066 bool nmethod::is_at_poll_return(address pc) { |
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1067 RelocIterator iter(this, pc, pc+1); |
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1068 while (iter.next()) { |
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1069 if (iter.type() == relocInfo::poll_return_type) |
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1070 return true; |
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1071 } |
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1072 return false; |
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1073 } |
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1074 |
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1075 |
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1076 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1077 RelocIterator iter(this, pc, pc+1); |
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1078 while (iter.next()) { |
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1079 relocInfo::relocType t = iter.type(); |
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1080 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1081 return true; |
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1082 } |
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1083 return false; |
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1084 } |
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1085 |
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1086 |
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1087 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1088 // re-patch all oop-bearing instructions, just in case some oops moved |
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1089 RelocIterator iter(this, begin, end); |
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1090 while (iter.next()) { |
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1091 if (iter.type() == relocInfo::oop_type) { |
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1092 oop_Relocation* reloc = iter.oop_reloc(); |
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1093 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1094 oop* dest = reloc->oop_addr(); |
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1095 initialize_immediate_oop(dest, (jobject) *dest); |
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1096 } |
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1097 // Refresh the oop-related bits of this instruction. |
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1098 reloc->fix_oop_relocation(); |
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1099 } |
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1100 |
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1101 // There must not be any interfering patches or breakpoints. |
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1102 assert(!(iter.type() == relocInfo::breakpoint_type |
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1103 && iter.breakpoint_reloc()->active()), |
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1104 "no active breakpoint"); |
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1105 } |
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1106 } |
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1107 |
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1108 |
0 | 1109 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1110 PcDesc* pd = pc_desc_at(pc); | |
1111 guarantee(pd != NULL, "scope must be present"); | |
1112 return new ScopeDesc(this, pd->scope_decode_offset(), | |
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1113 pd->obj_decode_offset(), pd->should_reexecute(), |
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1114 pd->return_oop()); |
0 | 1115 } |
1116 | |
1117 | |
1118 void nmethod::clear_inline_caches() { | |
1119 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1120 if (is_zombie()) { | |
1121 return; | |
1122 } | |
1123 | |
1124 RelocIterator iter(this); | |
1125 while (iter.next()) { | |
1126 iter.reloc()->clear_inline_cache(); | |
1127 } | |
1128 } | |
1129 | |
1130 | |
1131 void nmethod::cleanup_inline_caches() { | |
1132 | |
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1133 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1134 |
1135 // If the method is not entrant or zombie then a JMP is plastered over the | |
1136 // first few bytes. If an oop in the old code was there, that oop | |
1137 // should not get GC'd. Skip the first few bytes of oops on | |
1138 // not-entrant methods. | |
1139 address low_boundary = verified_entry_point(); | |
1140 if (!is_in_use()) { | |
1141 low_boundary += NativeJump::instruction_size; | |
1142 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1143 // This means that the low_boundary is going to be a little too high. | |
1144 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1145 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1146 } | |
1147 | |
1148 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1149 ResourceMark rm; | |
1150 RelocIterator iter(this, low_boundary); | |
1151 while(iter.next()) { | |
1152 switch(iter.type()) { | |
1153 case relocInfo::virtual_call_type: | |
1154 case relocInfo::opt_virtual_call_type: { | |
1155 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1156 // Ok, to lookup references to zombies here | |
1157 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1158 if( cb != NULL && cb->is_nmethod() ) { | |
1159 nmethod* nm = (nmethod*)cb; | |
1160 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1161 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1162 } |
1163 break; | |
1164 } | |
1165 case relocInfo::static_call_type: { | |
1166 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1167 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1168 if( cb != NULL && cb->is_nmethod() ) { | |
1169 nmethod* nm = (nmethod*)cb; | |
1170 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1171 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1172 } |
1173 break; | |
1174 } | |
1175 } | |
1176 } | |
1177 } | |
1178 | |
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1179 // This is a private interface with the sweeper. |
0 | 1180 void nmethod::mark_as_seen_on_stack() { |
1181 assert(is_not_entrant(), "must be a non-entrant method"); | |
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1182 // Set the traversal mark to ensure that the sweeper does 2 |
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1183 // cleaning passes before moving to zombie. |
0 | 1184 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1185 } | |
1186 | |
1187 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
1188 bool nmethod::can_not_entrant_be_converted() { | |
1189 assert(is_not_entrant(), "must be a non-entrant method"); | |
1190 | |
1191 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1192 // count can be greater than the stack traversal count before it hits the | |
1193 // nmethod for the second time. | |
1194 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
1195 } | |
1196 | |
1197 void nmethod::inc_decompile_count() { | |
1783 | 1198 if (!is_compiled_by_c2()) return; |
0 | 1199 // Could be gated by ProfileTraps, but do not bother... |
1200 methodOop m = method(); | |
1201 if (m == NULL) return; | |
1202 methodDataOop mdo = m->method_data(); | |
1203 if (mdo == NULL) return; | |
1204 // There is a benign race here. See comments in methodDataOop.hpp. | |
1205 mdo->inc_decompile_count(); | |
1206 } | |
1207 | |
1208 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1209 | |
1210 post_compiled_method_unload(); | |
1211 | |
1212 // Since this nmethod is being unloaded, make sure that dependencies | |
1213 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1214 // indicate that this work is being done during a GC. | |
1215 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1216 assert(is_alive != NULL, "Should be non-NULL"); | |
1217 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1218 flush_dependencies(is_alive); | |
1219 | |
1220 // Break cycle between nmethod & method | |
1221 if (TraceClassUnloading && WizardMode) { | |
1222 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1223 " unloadable], methodOop(" INTPTR_FORMAT | |
1224 "), cause(" INTPTR_FORMAT ")", | |
1225 this, (address)_method, (address)cause); | |
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1226 if (!Universe::heap()->is_gc_active()) |
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1227 cause->klass()->print(); |
0 | 1228 } |
941 | 1229 // Unlink the osr method, so we do not look this up again |
1230 if (is_osr_method()) { | |
1231 invalidate_osr_method(); | |
1232 } | |
0 | 1233 // If _method is already NULL the methodOop is about to be unloaded, |
1234 // so we don't have to break the cycle. Note that it is possible to | |
1235 // have the methodOop live here, in case we unload the nmethod because | |
1236 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1237 if (_method != NULL) { | |
1238 // OSR methods point to the methodOop, but the methodOop does not | |
1239 // point back! | |
1240 if (_method->code() == this) { | |
1241 _method->clear_code(); // Break a cycle | |
1242 } | |
1243 _method = NULL; // Clear the method of this dead nmethod | |
1244 } | |
1245 // Make the class unloaded - i.e., change state and notify sweeper | |
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1246 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1247 if (is_in_use()) { |
1248 // Transitioning directly from live to unloaded -- so | |
1249 // we need to force a cache clean-up; remember this | |
1250 // for later on. | |
1251 CodeCache::set_needs_cache_clean(true); | |
1252 } | |
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1253 _state = unloaded; |
0 | 1254 |
1109
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1255 // Log the unloading. |
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1256 log_state_change(); |
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1257 |
0 | 1258 // The methodOop is gone at this point |
1259 assert(_method == NULL, "Tautology"); | |
1260 | |
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1261 set_osr_link(NULL); |
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1262 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1263 NMethodSweeper::notify(this); |
1264 } | |
1265 | |
1266 void nmethod::invalidate_osr_method() { | |
1267 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1268 // Remove from list of active nmethods | |
1269 if (method() != NULL) | |
1270 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1271 // Set entry as invalid | |
1272 _entry_bci = InvalidOSREntryBci; | |
1273 } | |
1274 | |
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1275 void nmethod::log_state_change() const { |
0 | 1276 if (LogCompilation) { |
1277 if (xtty != NULL) { | |
1278 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1279 if (_state == unloaded) { |
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1280 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1281 os::current_thread_id()); |
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1282 } else { |
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1283 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1284 os::current_thread_id(), |
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1285 (_state == zombie ? " zombie='1'" : "")); |
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1286 } |
0 | 1287 log_identity(xtty); |
1288 xtty->stamp(); | |
1289 xtty->end_elem(); | |
1290 } | |
1291 } | |
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1292 if (PrintCompilation && _state != unloaded) { |
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1293 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
0 | 1294 tty->cr(); |
1295 } | |
1296 } | |
1297 | |
1298 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1299 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1300 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
1301 | |
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1302 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1303 nmethodLocker nml(this); |
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1304 methodHandle the_method(method()); |
1726 | 1305 No_Safepoint_Verifier nsv; |
0 | 1306 |
1307 { | |
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1308 // If the method is already zombie there is nothing to do |
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1309 if (is_zombie()) { |
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1310 return false; |
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1311 } |
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1312 |
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1313 // invalidate osr nmethod before acquiring the patching lock since |
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1314 // they both acquire leaf locks and we don't want a deadlock. |
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1315 // This logic is equivalent to the logic below for patching the |
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1316 // verified entry point of regular methods. |
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1317 if (is_osr_method()) { |
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1318 // this effectively makes the osr nmethod not entrant |
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1319 invalidate_osr_method(); |
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1320 } |
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1321 |
0 | 1322 // Enter critical section. Does not block for safepoint. |
1323 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1324 |
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1325 if (_state == state) { |
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1326 // another thread already performed this transition so nothing |
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1327 // to do, but return false to indicate this. |
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1328 return false; |
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1329 } |
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1330 |
0 | 1331 // The caller can be calling the method statically or through an inline |
1332 // cache call. | |
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1333 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1334 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1335 SharedRuntime::get_handle_wrong_method_stub()); | |
1336 } | |
1337 | |
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1338 if (is_in_use()) { |
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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 } |
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1343 |
0 | 1344 // Change state |
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1345 _state = state; |
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1346 |
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1347 // Log the transition once |
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1348 log_state_change(); |
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1349 |
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1350 // Remove nmethod from method. |
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1351 // We need to check if both the _code and _from_compiled_code_entry_point |
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1352 // refer to this nmethod because there is a race in setting these two fields |
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1353 // in methodOop as seen in bugid 4947125. |
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1354 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1355 // could be flushed and the compiler and vtable stubs could still call |
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1356 // through it. |
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1357 if (method() != NULL && (method()->code() == this || |
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1358 method()->from_compiled_entry() == verified_entry_point())) { |
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1359 HandleMark hm; |
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1360 method()->clear_code(); |
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1361 } |
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1362 |
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1363 if (state == not_entrant) { |
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1364 mark_as_seen_on_stack(); |
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1365 } |
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1366 |
0 | 1367 } // leave critical region under Patching_lock |
1368 | |
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1369 // When the nmethod becomes zombie it is no longer alive so the |
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1370 // dependencies must be flushed. nmethods in the not_entrant |
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1371 // state will be flushed later when the transition to zombie |
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1372 // happens or they get unloaded. |
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1373 if (state == zombie) { |
1726 | 1374 { |
1375 // Flushing dependecies must be done before any possible | |
1376 // safepoint can sneak in, otherwise the oops used by the | |
1377 // dependency logic could have become stale. | |
1378 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1379 flush_dependencies(NULL); | |
1380 } | |
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1381 |
1726 | 1382 { |
1383 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
1384 // and it hasn't already been reported for this nmethod then report it now. | |
1385 // (the event may have been reported earilier if the GC marked it for unloading). | |
1386 Pause_No_Safepoint_Verifier pnsv(&nsv); | |
1387 post_compiled_method_unload(); | |
1388 } | |
1389 | |
1390 #ifdef ASSERT | |
1391 // It's no longer safe to access the oops section since zombie | |
1392 // nmethods aren't scanned for GC. | |
1393 _oops_are_stale = true; | |
1394 #endif | |
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1395 } else { |
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1396 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1397 } |
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1398 |
0 | 1399 if (TraceCreateZombies) { |
1400 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1401 } | |
1402 | |
1403 // Make sweeper aware that there is a zombie method that needs to be removed | |
1404 NMethodSweeper::notify(this); | |
1405 | |
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1406 return true; |
0 | 1407 } |
1408 | |
1409 void nmethod::flush() { | |
1410 // Note that there are no valid oops in the nmethod anymore. | |
1411 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1412 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1413 | |
1414 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1415 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1416 |
1417 // completely deallocate this method | |
1418 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1419 if (PrintMethodFlushing) { | |
1202 | 1420 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1421 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1422 } |
1423 | |
1424 // We need to deallocate any ExceptionCache data. | |
1425 // Note that we do not need to grab the nmethod lock for this, it | |
1426 // better be thread safe if we're disposing of it! | |
1427 ExceptionCache* ec = exception_cache(); | |
1428 set_exception_cache(NULL); | |
1429 while(ec != NULL) { | |
1430 ExceptionCache* next = ec->next(); | |
1431 delete ec; | |
1432 ec = next; | |
1433 } | |
1434 | |
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1435 if (on_scavenge_root_list()) { |
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1436 CodeCache::drop_scavenge_root_nmethod(this); |
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1437 } |
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1438 |
1202 | 1439 if (is_speculatively_disconnected()) { |
1440 CodeCache::remove_saved_code(this); | |
1441 } | |
1442 | |
1692 | 1443 #ifdef SHARK |
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1444 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1445 #endif // SHARK |
1446 | |
0 | 1447 ((CodeBlob*)(this))->flush(); |
1448 | |
1449 CodeCache::free(this); | |
1450 } | |
1451 | |
1452 | |
1453 // | |
1454 // Notify all classes this nmethod is dependent on that it is no | |
1455 // longer dependent. This should only be called in two situations. | |
1456 // First, when a nmethod transitions to a zombie all dependents need | |
1457 // to be clear. Since zombification happens at a safepoint there's no | |
1458 // synchronization issues. The second place is a little more tricky. | |
1459 // During phase 1 of mark sweep class unloading may happen and as a | |
1460 // result some nmethods may get unloaded. In this case the flushing | |
1461 // of dependencies must happen during phase 1 since after GC any | |
1462 // dependencies in the unloaded nmethod won't be updated, so | |
1463 // traversing the dependency information in unsafe. In that case this | |
1464 // function is called with a non-NULL argument and this function only | |
1465 // notifies instanceKlasses that are reachable | |
1466 | |
1467 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1468 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1469 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1470 "is_alive is non-NULL if and only if we are called during GC"); | |
1471 if (!has_flushed_dependencies()) { | |
1472 set_has_flushed_dependencies(); | |
1473 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1474 klassOop klass = deps.context_type(); | |
1475 if (klass == NULL) continue; // ignore things like evol_method | |
1476 | |
1477 // During GC the is_alive closure is non-NULL, and is used to | |
1478 // determine liveness of dependees that need to be updated. | |
1479 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1480 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1481 } | |
1482 } | |
1483 } | |
1484 } | |
1485 | |
1486 | |
1487 // If this oop is not live, the nmethod can be unloaded. | |
1488 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1489 OopClosure* keep_alive, | |
1490 oop* root, bool unloading_occurred) { | |
1491 assert(root != NULL, "just checking"); | |
1492 oop obj = *root; | |
1493 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1494 return false; | |
1495 } | |
1496 if (obj->is_compiledICHolder()) { | |
1497 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1498 if (is_alive->do_object_b( | |
1499 cichk_oop->holder_method()->method_holder()) && | |
1500 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1501 // The oop should be kept alive | |
1502 keep_alive->do_oop(root); | |
1503 return false; | |
1504 } | |
1505 } | |
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1506 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1507 // simply because one of its constant oops has gone dead. |
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1508 // No actual classes need to be unloaded in order for this to occur. |
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1509 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1510 make_unloaded(is_alive, obj); |
1511 return true; | |
1512 } | |
1513 | |
1514 // ------------------------------------------------------------------ | |
1515 // post_compiled_method_load_event | |
1516 // new method for install_code() path | |
1517 // Transfer information from compilation to jvmti | |
1518 void nmethod::post_compiled_method_load_event() { | |
1519 | |
1520 methodOop moop = method(); | |
1521 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1522 moop->klass_name()->bytes(), | |
1523 moop->klass_name()->utf8_length(), | |
1524 moop->name()->bytes(), | |
1525 moop->name()->utf8_length(), | |
1526 moop->signature()->bytes(), | |
1527 moop->signature()->utf8_length(), | |
1748 | 1528 insts_begin(), insts_size()); |
0 | 1529 |
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1530 if (JvmtiExport::should_post_compiled_method_load() || |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1531 JvmtiExport::should_post_compiled_method_unload()) { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1532 get_and_cache_jmethod_id(); |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1533 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1534 |
0 | 1535 if (JvmtiExport::should_post_compiled_method_load()) { |
1536 JvmtiExport::post_compiled_method_load(this); | |
1537 } | |
1538 } | |
1539 | |
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1540 jmethodID nmethod::get_and_cache_jmethod_id() { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1541 if (_jmethod_id == NULL) { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1542 // Cache the jmethod_id since it can no longer be looked up once the |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1543 // method itself has been marked for unloading. |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1544 _jmethod_id = method()->jmethod_id(); |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1545 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1546 return _jmethod_id; |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1547 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1548 |
0 | 1549 void nmethod::post_compiled_method_unload() { |
1577
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1550 if (unload_reported()) { |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1551 // During unloading we transition to unloaded and then to zombie |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1552 // and the unloading is reported during the first transition. |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1553 return; |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1554 } |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1555 |
0 | 1556 assert(_method != NULL && !is_unloaded(), "just checking"); |
1557 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1558 | |
1559 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1560 // post the event. Sometime later this nmethod will be made a zombie |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1561 // by the sweeper but the methodOop will not be valid at that point. |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1562 // If the _jmethod_id is null then no load event was ever requested |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1563 // so don't bother posting the unload. The main reason for this is |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1564 // that the jmethodID is a weak reference to the methodOop so if |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1565 // it's being unloaded there's no way to look it up since the weak |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1566 // ref will have been cleared. |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
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changeset
|
1567 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1568 assert(!unload_reported(), "already unloaded"); |
1569 HandleMark hm; | |
1748 | 1570 JvmtiExport::post_compiled_method_unload(_jmethod_id, insts_begin()); |
0 | 1571 } |
1572 | |
1573 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1574 // any time. As the nmethod is being unloaded now we mark it has | |
1575 // having the unload event reported - this will ensure that we don't | |
1576 // attempt to report the event in the unlikely scenario where the | |
1577 // event is enabled at the time the nmethod is made a zombie. | |
1578 set_unload_reported(); | |
1579 } | |
1580 | |
1581 // This is called at the end of the strong tracing/marking phase of a | |
1582 // GC to unload an nmethod if it contains otherwise unreachable | |
1583 // oops. | |
1584 | |
1585 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1586 OopClosure* keep_alive, bool unloading_occurred) { | |
1587 // Make sure the oop's ready to receive visitors | |
1588 assert(!is_zombie() && !is_unloaded(), | |
1589 "should not call follow on zombie or unloaded nmethod"); | |
1590 | |
1591 // If the method is not entrant then a JMP is plastered over the | |
1592 // first few bytes. If an oop in the old code was there, that oop | |
1593 // should not get GC'd. Skip the first few bytes of oops on | |
1594 // not-entrant methods. | |
1595 address low_boundary = verified_entry_point(); | |
1596 if (is_not_entrant()) { | |
1597 low_boundary += NativeJump::instruction_size; | |
1598 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1599 // (See comment above.) | |
1600 } | |
1601 | |
1602 // The RedefineClasses() API can cause the class unloading invariant | |
1603 // to no longer be true. See jvmtiExport.hpp for details. | |
1604 // Also, leave a debugging breadcrumb in local flag. | |
1605 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1606 if (a_class_was_redefined) { | |
1607 // This set of the unloading_occurred flag is done before the | |
1608 // call to post_compiled_method_unload() so that the unloading | |
1609 // of this nmethod is reported. | |
1610 unloading_occurred = true; | |
1611 } | |
1612 | |
1613 // Follow methodOop | |
1614 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1615 return; | |
1616 } | |
1617 | |
1618 // Exception cache | |
1619 ExceptionCache* ec = exception_cache(); | |
1620 while (ec != NULL) { | |
1621 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1622 oop ex = *ex_addr; | |
1623 ExceptionCache* next_ec = ec->next(); | |
1624 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1625 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1626 remove_from_exception_cache(ec); | |
1627 } | |
1628 ec = next_ec; | |
1629 } | |
1630 | |
1631 // If class unloading occurred we first iterate over all inline caches and | |
1632 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1633 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1634 // iteration below. | |
1635 if (unloading_occurred) { | |
1636 RelocIterator iter(this, low_boundary); | |
1637 while(iter.next()) { | |
1638 if (iter.type() == relocInfo::virtual_call_type) { | |
1639 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1640 oop ic_oop = ic->cached_oop(); | |
1641 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1642 // The only exception is compiledICHolder oops which may | |
1643 // yet be marked below. (We check this further below). | |
1644 if (ic_oop->is_compiledICHolder()) { | |
1645 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1646 if (is_alive->do_object_b( | |
1647 cichk_oop->holder_method()->method_holder()) && | |
1648 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1649 continue; | |
1650 } | |
1651 } | |
1652 ic->set_to_clean(); | |
1489
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
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diff
changeset
|
1653 assert(ic->cached_oop() == NULL, |
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
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diff
changeset
|
1654 "cached oop in IC should be cleared"); |
0 | 1655 } |
1656 } | |
1657 } | |
1658 } | |
1659 | |
1660 // Compiled code | |
1661 RelocIterator iter(this, low_boundary); | |
1662 while (iter.next()) { | |
1663 if (iter.type() == relocInfo::oop_type) { | |
1664 oop_Relocation* r = iter.oop_reloc(); | |
1665 // In this loop, we must only traverse those oops directly embedded in | |
1666 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1667 assert(1 == (r->oop_is_immediate()) + | |
1668 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1669 "oop must be found in exactly one place"); | |
1670 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1671 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1672 return; | |
1673 } | |
1674 } | |
1675 } | |
1676 } | |
1677 | |
1678 | |
1679 // Scopes | |
1680 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1681 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1682 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1683 return; | |
1684 } | |
1685 } | |
1686 | |
1687 #ifndef PRODUCT | |
1688 // This nmethod was not unloaded; check below that all CompiledICs | |
1689 // refer to marked oops. | |
1690 { | |
1691 RelocIterator iter(this, low_boundary); | |
1692 while (iter.next()) { | |
1693 if (iter.type() == relocInfo::virtual_call_type) { | |
1694 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1695 oop ic_oop = ic->cached_oop(); | |
1696 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1697 "Found unmarked ic_oop in reachable nmethod"); | |
1698 } | |
1699 } | |
1700 } | |
1701 #endif // !PRODUCT | |
1702 } | |
1703 | |
941 | 1704 // This method is called twice during GC -- once while |
1705 // tracing the "active" nmethods on thread stacks during | |
1706 // the (strong) marking phase, and then again when walking | |
1707 // the code cache contents during the weak roots processing | |
1708 // phase. The two uses are distinguished by means of the | |
994
753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
jrose
parents:
993
diff
changeset
|
1709 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1710 // case. We want to walk the weak roots in the nmethod |
1711 // only in the second case. The weak roots in the nmethod | |
1712 // are the oops in the ExceptionCache and the InlineCache | |
1713 // oops. | |
994
753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
jrose
parents:
993
diff
changeset
|
1714 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1715 // make sure the oops ready to receive visitors |
1716 assert(!is_zombie() && !is_unloaded(), | |
1717 "should not call follow on zombie or unloaded nmethod"); | |
1718 | |
1719 // If the method is not entrant or zombie then a JMP is plastered over the | |
1720 // first few bytes. If an oop in the old code was there, that oop | |
1721 // should not get GC'd. Skip the first few bytes of oops on | |
1722 // not-entrant methods. | |
1723 address low_boundary = verified_entry_point(); | |
1724 if (is_not_entrant()) { | |
1725 low_boundary += NativeJump::instruction_size; | |
1726 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1727 // (See comment above.) | |
1728 } | |
1729 | |
1730 // Compiled code | |
1731 f->do_oop((oop*) &_method); | |
994
753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
jrose
parents:
993
diff
changeset
|
1732 if (!do_strong_roots_only) { |
941 | 1733 // weak roots processing phase -- update ExceptionCache oops |
1734 ExceptionCache* ec = exception_cache(); | |
1735 while(ec != NULL) { | |
1736 f->do_oop((oop*)ec->exception_type_addr()); | |
1737 ec = ec->next(); | |
1738 } | |
1739 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1740 |
1741 RelocIterator iter(this, low_boundary); | |
941 | 1742 |
0 | 1743 while (iter.next()) { |
1744 if (iter.type() == relocInfo::oop_type ) { | |
1745 oop_Relocation* r = iter.oop_reloc(); | |
1746 // In this loop, we must only follow those oops directly embedded in | |
1747 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1748 assert(1 == (r->oop_is_immediate()) + |
1749 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1750 "oop must be found in exactly one place"); | |
0 | 1751 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1752 f->do_oop(r->oop_addr()); | |
1753 } | |
1754 } | |
1755 } | |
1756 | |
1757 // Scopes | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1758 // This includes oop constants not inlined in the code stream. |
0 | 1759 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1760 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1761 f->do_oop(p); | |
1762 } | |
1763 } | |
1764 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1765 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1766 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1767 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1768 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
1769 // An nmethod is "marked" if its _mark_link is set non-null. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1770 // Even if it is the end of the linked list, it will have a non-null link value, |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1771 // as long as it is on the list. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1772 // This code must be MP safe, because it is used from parallel GC passes. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1773 bool nmethod::test_set_oops_do_mark() { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1774 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1775 nmethod* observed_mark_link = _oops_do_mark_link; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1776 if (observed_mark_link == NULL) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1777 // Claim this nmethod for this thread to mark. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1778 observed_mark_link = (nmethod*) |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1779 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1780 if (observed_mark_link == NULL) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1781 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1782 // Atomically append this nmethod (now claimed) to the head of the list: |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1783 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1784 for (;;) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1785 nmethod* required_mark_nmethods = observed_mark_nmethods; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1786 _oops_do_mark_link = required_mark_nmethods; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1787 observed_mark_nmethods = (nmethod*) |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1788 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1789 if (observed_mark_nmethods == required_mark_nmethods) |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1790 break; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1791 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1792 // Mark was clear when we first saw this guy. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1793 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1794 return false; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1795 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1796 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1797 // On fall through, another racing thread marked this nmethod before we did. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1798 return true; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1799 } |
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1800 |
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1801 void nmethod::oops_do_marking_prologue() { |
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1802 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1803 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1804 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1805 // may fork a bunch of threads, and we need them all to see the same state. |
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1806 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1807 guarantee(observed == NULL, "no races in this sequential code"); |
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1808 } |
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1809 |
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1810 void nmethod::oops_do_marking_epilogue() { |
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1811 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1812 nmethod* cur = _oops_do_mark_nmethods; |
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1813 while (cur != NMETHOD_SENTINEL) { |
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1814 assert(cur != NULL, "not NULL-terminated"); |
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1815 nmethod* next = cur->_oops_do_mark_link; |
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1816 cur->_oops_do_mark_link = NULL; |
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1817 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1818 cur = next; |
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1819 } |
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1820 void* required = _oops_do_mark_nmethods; |
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1821 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1822 guarantee(observed == required, "no races in this sequential code"); |
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1823 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1824 } |
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1825 |
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1826 class DetectScavengeRoot: public OopClosure { |
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1827 bool _detected_scavenge_root; |
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1828 public: |
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1829 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1830 { NOT_PRODUCT(_print_nm = NULL); } |
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1831 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1832 virtual void do_oop(oop* p) { |
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1833 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1834 NOT_PRODUCT(maybe_print(p)); |
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1835 _detected_scavenge_root = true; |
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1836 } |
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1837 } |
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1838 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1839 |
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1840 #ifndef PRODUCT |
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1841 nmethod* _print_nm; |
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1842 void maybe_print(oop* p) { |
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1843 if (_print_nm == NULL) return; |
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1844 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1845 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1846 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1847 (intptr_t)(*p), (intptr_t)p); |
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1848 (*p)->print(); |
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1849 } |
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1850 #endif //PRODUCT |
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1851 }; |
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1852 |
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1853 bool nmethod::detect_scavenge_root_oops() { |
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1854 DetectScavengeRoot detect_scavenge_root; |
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1855 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1856 oops_do(&detect_scavenge_root); |
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1857 return detect_scavenge_root.detected_scavenge_root(); |
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1858 } |
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1859 |
0 | 1860 // Method that knows how to preserve outgoing arguments at call. This method must be |
1861 // called with a frame corresponding to a Java invoke | |
1862 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1863 #ifndef SHARK |
0 | 1864 if (!method()->is_native()) { |
1865 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1866 Bytecode_invoke call(ssd.method(), ssd.bci()); |
1867 bool has_receiver = call.has_receiver(); | |
1868 symbolOop signature = call.signature(); | |
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1869 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1870 } |
1692 | 1871 #endif // !SHARK |
0 | 1872 } |
1873 | |
1874 | |
1875 oop nmethod::embeddedOop_at(u_char* p) { | |
1876 RelocIterator iter(this, p, p + oopSize); | |
1877 while (iter.next()) | |
1878 if (iter.type() == relocInfo::oop_type) { | |
1879 return iter.oop_reloc()->oop_value(); | |
1880 } | |
1881 return NULL; | |
1882 } | |
1883 | |
1884 | |
1885 inline bool includes(void* p, void* from, void* to) { | |
1886 return from <= p && p < to; | |
1887 } | |
1888 | |
1889 | |
1890 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1891 assert(count >= 2, "must be sentinel values, at least"); | |
1892 | |
1893 #ifdef ASSERT | |
1894 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1895 int prev_offset = pcs[0].pc_offset(); | |
1896 assert(prev_offset == PcDesc::lower_offset_limit, | |
1897 "must start with a sentinel"); | |
1898 for (int i = 1; i < count; i++) { | |
1899 int this_offset = pcs[i].pc_offset(); | |
1900 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1901 prev_offset = this_offset; | |
1902 } | |
1903 assert(prev_offset == PcDesc::upper_offset_limit, | |
1904 "must end with a sentinel"); | |
1905 #endif //ASSERT | |
1906 | |
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1907 // Search for MethodHandle invokes and tag the nmethod. |
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1908 for (int i = 0; i < count; i++) { |
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1909 if (pcs[i].is_method_handle_invoke()) { |
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1910 set_has_method_handle_invokes(true); |
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1911 break; |
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1912 } |
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1913 } |
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1914 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1915 |
0 | 1916 int size = count * sizeof(PcDesc); |
1917 assert(scopes_pcs_size() >= size, "oob"); | |
1918 memcpy(scopes_pcs_begin(), pcs, size); | |
1919 | |
1920 // Adjust the final sentinel downward. | |
1921 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1922 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1923 last_pc->set_pc_offset(content_size() + 1); |
0 | 1924 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1925 // Fill any rounding gaps with copies of the last record. | |
1926 last_pc[1] = last_pc[0]; | |
1927 } | |
1928 // The following assert could fail if sizeof(PcDesc) is not | |
1929 // an integral multiple of oopSize (the rounding term). | |
1930 // If it fails, change the logic to always allocate a multiple | |
1931 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1932 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1933 } | |
1934 | |
1935 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1936 assert(scopes_data_size() >= size, "oob"); | |
1937 memcpy(scopes_data_begin(), buffer, size); | |
1938 } | |
1939 | |
1940 | |
1941 #ifdef ASSERT | |
1942 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1943 PcDesc* lower = nm->scopes_pcs_begin(); | |
1944 PcDesc* upper = nm->scopes_pcs_end(); | |
1945 lower += 1; // exclude initial sentinel | |
1946 PcDesc* res = NULL; | |
1947 for (PcDesc* p = lower; p < upper; p++) { | |
1948 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1949 if (match_desc(p, pc_offset, approximate)) { | |
1950 if (res == NULL) | |
1951 res = p; | |
1952 else | |
1953 res = (PcDesc*) badAddress; | |
1954 } | |
1955 } | |
1956 return res; | |
1957 } | |
1958 #endif | |
1959 | |
1960 | |
1961 // Finds a PcDesc with real-pc equal to "pc" | |
1962 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1963 address base_address = code_begin(); |
0 | 1964 if ((pc < base_address) || |
1965 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1966 return NULL; // PC is wildly out of range | |
1967 } | |
1968 int pc_offset = (int) (pc - base_address); | |
1969 | |
1970 // Check the PcDesc cache if it contains the desired PcDesc | |
1971 // (This as an almost 100% hit rate.) | |
1972 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1973 if (res != NULL) { | |
1974 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1975 return res; | |
1976 } | |
1977 | |
1978 // Fallback algorithm: quasi-linear search for the PcDesc | |
1979 // Find the last pc_offset less than the given offset. | |
1980 // The successor must be the required match, if there is a match at all. | |
1981 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1982 PcDesc* lower = scopes_pcs_begin(); | |
1983 PcDesc* upper = scopes_pcs_end(); | |
1984 upper -= 1; // exclude final sentinel | |
1985 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1986 | |
1987 #define assert_LU_OK \ | |
1988 /* invariant on lower..upper during the following search: */ \ | |
1989 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1990 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1991 assert_LU_OK; | |
1992 | |
1993 // Use the last successful return as a split point. | |
1994 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
1995 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1996 if (mid->pc_offset() < pc_offset) { | |
1997 lower = mid; | |
1998 } else { | |
1999 upper = mid; | |
2000 } | |
2001 | |
2002 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2003 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2004 const int RADIX = (1 << LOG2_RADIX); | |
2005 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2006 while ((mid = lower + step) < upper) { | |
2007 assert_LU_OK; | |
2008 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2009 if (mid->pc_offset() < pc_offset) { | |
2010 lower = mid; | |
2011 } else { | |
2012 upper = mid; | |
2013 break; | |
2014 } | |
2015 } | |
2016 assert_LU_OK; | |
2017 } | |
2018 | |
2019 // Sneak up on the value with a linear search of length ~16. | |
2020 while (true) { | |
2021 assert_LU_OK; | |
2022 mid = lower + 1; | |
2023 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2024 if (mid->pc_offset() < pc_offset) { | |
2025 lower = mid; | |
2026 } else { | |
2027 upper = mid; | |
2028 break; | |
2029 } | |
2030 } | |
2031 #undef assert_LU_OK | |
2032 | |
2033 if (match_desc(upper, pc_offset, approximate)) { | |
2034 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2035 _pc_desc_cache.add_pc_desc(upper); | |
2036 return upper; | |
2037 } else { | |
2038 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2039 return NULL; | |
2040 } | |
2041 } | |
2042 | |
2043 | |
2044 bool nmethod::check_all_dependencies() { | |
2045 bool found_check = false; | |
2046 // wholesale check of all dependencies | |
2047 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2048 if (deps.check_dependency() != NULL) { | |
2049 found_check = true; | |
2050 NOT_DEBUG(break); | |
2051 } | |
2052 } | |
2053 return found_check; // tell caller if we found anything | |
2054 } | |
2055 | |
2056 bool nmethod::check_dependency_on(DepChange& changes) { | |
2057 // What has happened: | |
2058 // 1) a new class dependee has been added | |
2059 // 2) dependee and all its super classes have been marked | |
2060 bool found_check = false; // set true if we are upset | |
2061 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2062 // Evaluate only relevant dependencies. | |
2063 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2064 found_check = true; | |
2065 NOT_DEBUG(break); | |
2066 } | |
2067 } | |
2068 return found_check; | |
2069 } | |
2070 | |
2071 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2072 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2073 objArrayOop dependee_methods = dependee_ik->methods(); | |
2074 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2075 if (deps.type() == Dependencies::evol_method) { | |
2076 methodOop method = deps.method_argument(0); | |
2077 for (int j = 0; j < dependee_methods->length(); j++) { | |
2078 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2079 // RC_TRACE macro has an embedded ResourceMark | |
2080 RC_TRACE(0x01000000, | |
2081 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2082 _method->method_holder()->klass_part()->external_name(), | |
2083 _method->name()->as_C_string(), | |
2084 _method->signature()->as_C_string(), compile_id(), | |
2085 method->method_holder()->klass_part()->external_name(), | |
2086 method->name()->as_C_string(), | |
2087 method->signature()->as_C_string())); | |
2088 if (TraceDependencies || LogCompilation) | |
2089 deps.log_dependency(dependee); | |
2090 return true; | |
2091 } | |
2092 } | |
2093 } | |
2094 } | |
2095 return false; | |
2096 } | |
2097 | |
2098 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2099 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2100 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2101 if (deps.type() != Dependencies::evol_method) | |
2102 continue; | |
2103 methodOop method = deps.method_argument(0); | |
2104 if (method == dependee) return true; | |
2105 } | |
2106 return false; | |
2107 } | |
2108 | |
2109 | |
2110 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2111 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2112 if (is_zombie()) { |
2113 // a zombie may never be patched | |
2114 return false; | |
2115 } | |
2116 return true; | |
2117 } | |
2118 | |
2119 | |
2120 address nmethod::continuation_for_implicit_exception(address pc) { | |
2121 // Exception happened outside inline-cache check code => we are inside | |
2122 // an active nmethod => use cpc to determine a return address | |
1748 | 2123 int exception_offset = pc - code_begin(); |
0 | 2124 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2125 #ifdef ASSERT | |
2126 if (cont_offset == 0) { | |
2127 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2128 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2129 HandleMark hm(thread); | |
2130 ResourceMark rm(thread); | |
2131 CodeBlob* cb = CodeCache::find_blob(pc); | |
2132 assert(cb != NULL && cb == this, ""); | |
2133 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2134 print(); | |
2135 method()->print_codes(); | |
2136 print_code(); | |
2137 print_pcs(); | |
2138 } | |
2139 #endif | |
1250 | 2140 if (cont_offset == 0) { |
2141 // Let the normal error handling report the exception | |
2142 return NULL; | |
2143 } | |
1748 | 2144 return code_begin() + cont_offset; |
0 | 2145 } |
2146 | |
2147 | |
2148 | |
2149 void nmethod_init() { | |
2150 // make sure you didn't forget to adjust the filler fields | |
2151 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2152 } | |
2153 | |
2154 | |
2155 //------------------------------------------------------------------------------------------- | |
2156 | |
2157 | |
2158 // QQQ might we make this work from a frame?? | |
2159 nmethodLocker::nmethodLocker(address pc) { | |
2160 CodeBlob* cb = CodeCache::find_blob(pc); | |
2161 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2162 _nm = (nmethod*)cb; | |
2163 lock_nmethod(_nm); | |
2164 } | |
2165 | |
2166 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
2167 if (nm == NULL) return; | |
2168 Atomic::inc(&nm->_lock_count); | |
2169 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
2170 } | |
2171 | |
2172 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2173 if (nm == NULL) return; | |
2174 Atomic::dec(&nm->_lock_count); | |
2175 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2176 } | |
2177 | |
1204 | 2178 |
2179 // ----------------------------------------------------------------------------- | |
2180 // nmethod::get_deopt_original_pc | |
2181 // | |
2182 // Return the original PC for the given PC if: | |
2183 // (a) the given PC belongs to a nmethod and | |
2184 // (b) it is a deopt PC | |
2185 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2186 if (fr->cb() == NULL) return NULL; | |
2187 | |
2188 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2189 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2190 return nm->get_original_pc(fr); | |
2191 | |
2192 return NULL; | |
0 | 2193 } |
2194 | |
2195 | |
2196 // ----------------------------------------------------------------------------- | |
1135
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2197 // MethodHandle |
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2198 |
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2199 bool nmethod::is_method_handle_return(address return_pc) { |
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2200 if (!has_method_handle_invokes()) return false; |
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2201 PcDesc* pd = pc_desc_at(return_pc); |
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2202 if (pd == NULL) |
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2203 return false; |
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2204 return pd->is_method_handle_invoke(); |
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2205 } |
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2206 |
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2207 |
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2208 // ----------------------------------------------------------------------------- |
0 | 2209 // Verification |
2210 | |
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2211 class VerifyOopsClosure: public OopClosure { |
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2212 nmethod* _nm; |
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2213 bool _ok; |
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2214 public: |
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2215 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2216 bool ok() { return _ok; } |
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2217 virtual void do_oop(oop* p) { |
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2218 if ((*p) == NULL || (*p)->is_oop()) return; |
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2219 if (_ok) { |
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2220 _nm->print_nmethod(true); |
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2221 _ok = false; |
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2222 } |
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2223 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2224 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2225 } |
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2226 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2227 }; |
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2228 |
0 | 2229 void nmethod::verify() { |
2230 | |
2231 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2232 // seems odd. | |
2233 | |
2234 if( is_zombie() || is_not_entrant() ) | |
2235 return; | |
2236 | |
2237 // Make sure all the entry points are correctly aligned for patching. | |
2238 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2239 | |
2240 assert(method()->is_oop(), "must be valid"); | |
2241 | |
2242 ResourceMark rm; | |
2243 | |
2244 if (!CodeCache::contains(this)) { | |
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2245 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2246 } |
2247 | |
2248 if(is_native_method() ) | |
2249 return; | |
2250 | |
2251 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2252 if (nm != this) { | |
1490
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2253 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2254 this)); |
0 | 2255 } |
2256 | |
2257 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2258 if (! p->verify(this)) { | |
2259 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2260 } | |
2261 } | |
2262 | |
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2263 VerifyOopsClosure voc(this); |
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2264 oops_do(&voc); |
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2265 assert(voc.ok(), "embedded oops must be OK"); |
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2266 verify_scavenge_root_oops(); |
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2267 |
0 | 2268 verify_scopes(); |
2269 } | |
2270 | |
2271 | |
2272 void nmethod::verify_interrupt_point(address call_site) { | |
2273 // This code does not work in release mode since | |
2274 // owns_lock only is available in debug mode. | |
2275 CompiledIC* ic = NULL; | |
2276 Thread *cur = Thread::current(); | |
2277 if (CompiledIC_lock->owner() == cur || | |
2278 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2279 SafepointSynchronize::is_at_safepoint())) { | |
2280 ic = CompiledIC_at(call_site); | |
2281 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2282 } else { | |
2283 MutexLocker ml_verify (CompiledIC_lock); | |
2284 ic = CompiledIC_at(call_site); | |
2285 } | |
2286 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2287 assert(pd != NULL, "PcDesc must exist"); | |
2288 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
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2289 pd->obj_decode_offset(), pd->should_reexecute(), |
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2290 pd->return_oop()); |
0 | 2291 !sd->is_top(); sd = sd->sender()) { |
2292 sd->verify(); | |
2293 } | |
2294 } | |
2295 | |
2296 void nmethod::verify_scopes() { | |
2297 if( !method() ) return; // Runtime stubs have no scope | |
2298 if (method()->is_native()) return; // Ignore stub methods. | |
2299 // iterate through all interrupt point | |
2300 // and verify the debug information is valid. | |
2301 RelocIterator iter((nmethod*)this); | |
2302 while (iter.next()) { | |
2303 address stub = NULL; | |
2304 switch (iter.type()) { | |
2305 case relocInfo::virtual_call_type: | |
2306 verify_interrupt_point(iter.addr()); | |
2307 break; | |
2308 case relocInfo::opt_virtual_call_type: | |
2309 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2310 verify_interrupt_point(iter.addr()); | |
2311 break; | |
2312 case relocInfo::static_call_type: | |
2313 stub = iter.static_call_reloc()->static_stub(); | |
2314 //verify_interrupt_point(iter.addr()); | |
2315 break; | |
2316 case relocInfo::runtime_call_type: | |
2317 address destination = iter.reloc()->value(); | |
2318 // Right now there is no way to find out which entries support | |
2319 // an interrupt point. It would be nice if we had this | |
2320 // information in a table. | |
2321 break; | |
2322 } | |
2323 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2324 } | |
2325 } | |
2326 | |
2327 | |
2328 // ----------------------------------------------------------------------------- | |
2329 // Non-product code | |
2330 #ifndef PRODUCT | |
2331 | |
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2332 class DebugScavengeRoot: public OopClosure { |
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2333 nmethod* _nm; |
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2334 bool _ok; |
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2335 public: |
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2336 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2337 bool ok() { return _ok; } |
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2338 virtual void do_oop(oop* p) { |
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2339 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2340 if (_ok) { |
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2341 _nm->print_nmethod(true); |
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2342 _ok = false; |
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2343 } |
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2344 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2345 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2346 (*p)->print(); |
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2347 } |
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2348 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2349 }; |
0 | 2350 |
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2351 void nmethod::verify_scavenge_root_oops() { |
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2352 if (!on_scavenge_root_list()) { |
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2353 // Actually look inside, to verify the claim that it's clean. |
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2354 DebugScavengeRoot debug_scavenge_root(this); |
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2355 oops_do(&debug_scavenge_root); |
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2356 if (!debug_scavenge_root.ok()) |
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2357 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2358 } |
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2359 assert(scavenge_root_not_marked(), ""); |
0 | 2360 } |
2361 | |
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2362 #endif // PRODUCT |
0 | 2363 |
2364 // Printing operations | |
2365 | |
2366 void nmethod::print() const { | |
2367 ResourceMark rm; | |
2368 ttyLocker ttyl; // keep the following output all in one block | |
2369 | |
2370 tty->print("Compiled "); | |
2371 | |
2372 if (is_compiled_by_c1()) { | |
2373 tty->print("(c1) "); | |
2374 } else if (is_compiled_by_c2()) { | |
2375 tty->print("(c2) "); | |
1692 | 2376 } else if (is_compiled_by_shark()) { |
2377 tty->print("(shark) "); | |
0 | 2378 } else { |
2379 tty->print("(nm) "); | |
2380 } | |
2381 | |
2382 print_on(tty, "nmethod"); | |
2383 tty->cr(); | |
2384 if (WizardMode) { | |
2385 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2386 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2387 tty->print(" { "); | |
2388 if (is_in_use()) tty->print("in_use "); | |
2389 if (is_not_entrant()) tty->print("not_entrant "); | |
2390 if (is_zombie()) tty->print("zombie "); | |
2391 if (is_unloaded()) tty->print("unloaded "); | |
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2392 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2393 tty->print_cr("}:"); |
2394 } | |
2395 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2396 (address)this, | |
2397 (address)this + size(), | |
2398 size()); | |
2399 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2400 relocation_begin(), | |
2401 relocation_end(), | |
2402 relocation_size()); | |
1762
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2403 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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diff
changeset
|
2404 consts_begin(), |
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diff
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|
2405 consts_end(), |
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changeset
|
2406 consts_size()); |
1748 | 2407 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2408 insts_begin(), | |
2409 insts_end(), | |
2410 insts_size()); | |
0 | 2411 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2412 stub_begin(), | |
2413 stub_end(), | |
2414 stub_size()); | |
1563
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6951083: oops and relocations should part of nmethod not CodeBlob
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diff
changeset
|
2415 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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diff
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|
2416 oops_begin(), |
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|
2417 oops_end(), |
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|
2418 oops_size()); |
0 | 2419 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2420 scopes_data_begin(), | |
2421 scopes_data_end(), | |
2422 scopes_data_size()); | |
2423 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2424 scopes_pcs_begin(), | |
2425 scopes_pcs_end(), | |
2426 scopes_pcs_size()); | |
2427 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2428 dependencies_begin(), | |
2429 dependencies_end(), | |
2430 dependencies_size()); | |
2431 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2432 handler_table_begin(), | |
2433 handler_table_end(), | |
2434 handler_table_size()); | |
2435 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2436 nul_chk_table_begin(), | |
2437 nul_chk_table_end(), | |
2438 nul_chk_table_size()); | |
2439 } | |
2440 | |
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diff
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|
2441 void nmethod::print_code() { |
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diff
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|
2442 HandleMark hm; |
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diff
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|
2443 ResourceMark m; |
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diff
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|
2444 Disassembler::decode(this); |
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|
2445 } |
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|
2446 |
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2447 |
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|
2448 #ifndef PRODUCT |
0 | 2449 |
2450 void nmethod::print_scopes() { | |
2451 // Find the first pc desc for all scopes in the code and print it. | |
2452 ResourceMark rm; | |
2453 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2454 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2455 continue; | |
2456 | |
2457 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2458 sd->print_on(tty, p); | |
2459 } | |
2460 } | |
2461 | |
2462 void nmethod::print_dependencies() { | |
2463 ResourceMark rm; | |
2464 ttyLocker ttyl; // keep the following output all in one block | |
2465 tty->print_cr("Dependencies:"); | |
2466 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2467 deps.print_dependency(); | |
2468 klassOop ctxk = deps.context_type(); | |
2469 if (ctxk != NULL) { | |
2470 Klass* k = Klass::cast(ctxk); | |
2471 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2472 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2473 } |
2474 } | |
2475 deps.log_dependency(); // put it into the xml log also | |
2476 } | |
2477 } | |
2478 | |
2479 | |
2480 void nmethod::print_relocations() { | |
2481 ResourceMark m; // in case methods get printed via the debugger | |
2482 tty->print_cr("relocations:"); | |
2483 RelocIterator iter(this); | |
2484 iter.print(); | |
2485 if (UseRelocIndex) { | |
2486 jint* index_end = (jint*)relocation_end() - 1; | |
2487 jint index_size = *index_end; | |
2488 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2489 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2490 if (index_size > 0) { | |
2491 jint* ip; | |
2492 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2493 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2494 ip[0], | |
2495 ip[1], | |
2496 header_end()+ip[0], | |
2497 relocation_begin()-1+ip[1]); | |
2498 for (; ip < index_end; ip++) | |
2499 tty->print_cr(" (%d ?)", ip[0]); | |
2500 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2501 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2502 } | |
2503 } | |
2504 } | |
2505 | |
2506 | |
2507 void nmethod::print_pcs() { | |
2508 ResourceMark m; // in case methods get printed via debugger | |
2509 tty->print_cr("pc-bytecode offsets:"); | |
2510 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2511 p->print(this); | |
2512 } | |
2513 } | |
2514 | |
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2515 #endif // PRODUCT |
0 | 2516 |
2517 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2518 RelocIterator iter(this, begin, end); | |
2519 bool have_one = false; | |
2520 while (iter.next()) { | |
2521 have_one = true; | |
2522 switch (iter.type()) { | |
2523 case relocInfo::none: return "no_reloc"; | |
2524 case relocInfo::oop_type: { | |
2525 stringStream st; | |
2526 oop_Relocation* r = iter.oop_reloc(); | |
2527 oop obj = r->oop_value(); | |
2528 st.print("oop("); | |
2529 if (obj == NULL) st.print("NULL"); | |
2530 else obj->print_value_on(&st); | |
2531 st.print(")"); | |
2532 return st.as_string(); | |
2533 } | |
2534 case relocInfo::virtual_call_type: return "virtual_call"; | |
2535 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2536 case relocInfo::static_call_type: return "static_call"; | |
2537 case relocInfo::static_stub_type: return "static_stub"; | |
2538 case relocInfo::runtime_call_type: return "runtime_call"; | |
2539 case relocInfo::external_word_type: return "external_word"; | |
2540 case relocInfo::internal_word_type: return "internal_word"; | |
2541 case relocInfo::section_word_type: return "section_word"; | |
2542 case relocInfo::poll_type: return "poll"; | |
2543 case relocInfo::poll_return_type: return "poll_return"; | |
2544 case relocInfo::type_mask: return "type_bit_mask"; | |
2545 } | |
2546 } | |
2547 return have_one ? "other" : NULL; | |
2548 } | |
2549 | |
2550 // Return a the last scope in (begin..end] | |
2551 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2552 PcDesc* p = pc_desc_near(begin+1); | |
2553 if (p != NULL && p->real_pc(this) <= end) { | |
2554 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
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|
2555 p->obj_decode_offset(), p->should_reexecute(), |
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2556 p->return_oop()); |
0 | 2557 } |
2558 return NULL; | |
2559 } | |
2560 | |
1155
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|
2561 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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|
2562 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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|
2563 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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2564 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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|
2565 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2566 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
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|
2567 |
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diff
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|
2568 if (has_method_handle_invokes()) |
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diff
changeset
|
2569 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
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diff
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|
2570 |
1155
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diff
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|
2571 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
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diff
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|
2572 |
1155
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|
2573 if (block_begin == entry_point()) { |
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diff
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|
2574 methodHandle m = method(); |
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|
2575 if (m.not_null()) { |
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diff
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|
2576 stream->print(" # "); |
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diff
changeset
|
2577 m->print_value_on(stream); |
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diff
changeset
|
2578 stream->cr(); |
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|
2579 } |
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|
2580 if (m.not_null() && !is_osr_method()) { |
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|
2581 ResourceMark rm; |
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|
2582 int sizeargs = m->size_of_parameters(); |
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|
2583 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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|
2584 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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|
2585 { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2586 int sig_index = 0; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
2587 if (!m->is_static()) |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
2588 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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diff
changeset
|
2589 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
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diff
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|
2590 BasicType t = ss.type(); |
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|
2591 sig_bt[sig_index++] = t; |
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2592 if (type2size[t] == 2) { |
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diff
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|
2593 sig_bt[sig_index++] = T_VOID; |
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|
2594 } else { |
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|
2595 assert(type2size[t] == 1, "size is 1 or 2"); |
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|
2596 } |
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|
2597 } |
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|
2598 assert(sig_index == sizeargs, ""); |
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|
2599 } |
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|
2600 const char* spname = "sp"; // make arch-specific? |
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|
2601 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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2602 int stack_slot_offset = this->frame_size() * wordSize; |
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|
2603 int tab1 = 14, tab2 = 24; |
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|
2604 int sig_index = 0; |
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|
2605 int arg_index = (m->is_static() ? 0 : -1); |
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|
2606 bool did_old_sp = false; |
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|
2607 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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|
2608 bool at_this = (arg_index == -1); |
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|
2609 bool at_old_sp = false; |
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|
2610 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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2611 assert(t == sig_bt[sig_index], "sigs in sync"); |
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|
2612 if (at_this) |
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|
2613 stream->print(" # this: "); |
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|
2614 else |
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|
2615 stream->print(" # parm%d: ", arg_index); |
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|
2616 stream->move_to(tab1); |
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2617 VMReg fst = regs[sig_index].first(); |
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|
2618 VMReg snd = regs[sig_index].second(); |
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2619 if (fst->is_reg()) { |
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|
2620 stream->print("%s", fst->name()); |
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|
2621 if (snd->is_valid()) { |
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|
2622 stream->print(":%s", snd->name()); |
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|
2623 } |
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2624 } else if (fst->is_stack()) { |
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|
2625 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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2626 if (offset == stack_slot_offset) at_old_sp = true; |
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2627 stream->print("[%s+0x%x]", spname, offset); |
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2628 } else { |
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2629 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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2630 } |
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2631 stream->print(" "); |
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2632 stream->move_to(tab2); |
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2633 stream->print("= "); |
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2634 if (at_this) { |
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2635 m->method_holder()->print_value_on(stream); |
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2636 } else { |
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2637 bool did_name = false; |
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2638 if (!at_this && ss.is_object()) { |
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2639 symbolOop name = ss.as_symbol_or_null(); |
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2640 if (name != NULL) { |
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2641 name->print_value_on(stream); |
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2642 did_name = true; |
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2643 } |
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2644 } |
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2645 if (!did_name) |
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2646 stream->print("%s", type2name(t)); |
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2647 } |
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2648 if (at_old_sp) { |
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2649 stream->print(" (%s of caller)", spname); |
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2650 did_old_sp = true; |
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2651 } |
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2652 stream->cr(); |
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2653 sig_index += type2size[t]; |
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2654 arg_index += 1; |
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2655 if (!at_this) ss.next(); |
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2656 } |
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2657 if (!did_old_sp) { |
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2658 stream->print(" # "); |
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2659 stream->move_to(tab1); |
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2660 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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2661 stream->print(" (%s of caller)", spname); |
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2662 stream->cr(); |
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2663 } |
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2664 } |
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2665 } |
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2666 } |
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2667 |
0 | 2668 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2669 // First, find an oopmap in (begin, end]. | |
2670 // We use the odd half-closed interval so that oop maps and scope descs | |
2671 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2672 address base = code_begin(); |
0 | 2673 OopMapSet* oms = oop_maps(); |
2674 if (oms != NULL) { | |
2675 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2676 OopMap* om = oms->at(i); | |
2677 address pc = base + om->offset(); | |
2678 if (pc > begin) { | |
2679 if (pc <= end) { | |
100
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2680 st->move_to(column); |
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2681 st->print("; "); |
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diff
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2682 om->print_on(st); |
0 | 2683 } |
2684 break; | |
2685 } | |
2686 } | |
2687 } | |
100
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2688 |
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2689 // Print any debug info present at this pc. |
0 | 2690 ScopeDesc* sd = scope_desc_in(begin, end); |
2691 if (sd != NULL) { | |
100
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2692 st->move_to(column); |
0 | 2693 if (sd->bci() == SynchronizationEntryBCI) { |
2694 st->print(";*synchronization entry"); | |
2695 } else { | |
2696 if (sd->method().is_null()) { | |
100
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2697 st->print("method is NULL"); |
0 | 2698 } else if (sd->method()->is_native()) { |
100
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2699 st->print("method is native"); |
0 | 2700 } else { |
2142 | 2701 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2702 st->print(";*%s", Bytecodes::name(bc)); |
2703 switch (bc) { | |
2704 case Bytecodes::_invokevirtual: | |
2705 case Bytecodes::_invokespecial: | |
2706 case Bytecodes::_invokestatic: | |
2707 case Bytecodes::_invokeinterface: | |
2708 { | |
2142 | 2709 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2710 st->print(" "); |
2142 | 2711 if (invoke.name() != NULL) |
2712 invoke.name()->print_symbol_on(st); | |
0 | 2713 else |
2714 st->print("<UNKNOWN>"); | |
2715 break; | |
2716 } | |
2717 case Bytecodes::_getfield: | |
2718 case Bytecodes::_putfield: | |
2719 case Bytecodes::_getstatic: | |
2720 case Bytecodes::_putstatic: | |
2721 { | |
2142 | 2722 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2723 st->print(" "); |
2142 | 2724 if (field.name() != NULL) |
2725 field.name()->print_symbol_on(st); | |
0 | 2726 else |
2727 st->print("<UNKNOWN>"); | |
2728 } | |
2729 } | |
2730 } | |
2731 } | |
100
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2732 |
0 | 2733 // Print all scopes |
2734 for (;sd != NULL; sd = sd->sender()) { | |
100
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2735 st->move_to(column); |
0 | 2736 st->print("; -"); |
2737 if (sd->method().is_null()) { | |
100
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2738 st->print("method is NULL"); |
0 | 2739 } else { |
2740 sd->method()->print_short_name(st); | |
2741 } | |
2742 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2743 if (lineno != -1) { | |
2744 st->print("@%d (line %d)", sd->bci(), lineno); | |
2745 } else { | |
2746 st->print("@%d", sd->bci()); | |
2747 } | |
2748 st->cr(); | |
2749 } | |
2750 } | |
2751 | |
2752 // Print relocation information | |
2753 const char* str = reloc_string_for(begin, end); | |
2754 if (str != NULL) { | |
2755 if (sd != NULL) st->cr(); | |
100
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2756 st->move_to(column); |
0 | 2757 st->print("; {%s}", str); |
2758 } | |
1748 | 2759 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2760 if (cont_offset != 0) { |
100
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2761 st->move_to(column); |
1748 | 2762 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2763 } |
2764 | |
2765 } | |
2766 | |
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2767 #ifndef PRODUCT |
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2768 |
0 | 2769 void nmethod::print_value_on(outputStream* st) const { |
2770 print_on(st, "nmethod"); | |
2771 } | |
2772 | |
2773 void nmethod::print_calls(outputStream* st) { | |
2774 RelocIterator iter(this); | |
2775 while (iter.next()) { | |
2776 switch (iter.type()) { | |
2777 case relocInfo::virtual_call_type: | |
2778 case relocInfo::opt_virtual_call_type: { | |
2779 VerifyMutexLocker mc(CompiledIC_lock); | |
2780 CompiledIC_at(iter.reloc())->print(); | |
2781 break; | |
2782 } | |
2783 case relocInfo::static_call_type: | |
2784 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2785 compiledStaticCall_at(iter.reloc())->print(); | |
2786 break; | |
2787 } | |
2788 } | |
2789 } | |
2790 | |
2791 void nmethod::print_handler_table() { | |
2792 ExceptionHandlerTable(this).print(); | |
2793 } | |
2794 | |
2795 void nmethod::print_nul_chk_table() { | |
1748 | 2796 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2797 } |
2798 | |
2799 void nmethod::print_statistics() { | |
2800 ttyLocker ttyl; | |
2801 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2802 nmethod_stats.print_native_nmethod_stats(); | |
2803 nmethod_stats.print_nmethod_stats(); | |
2804 DebugInformationRecorder::print_statistics(); | |
2805 nmethod_stats.print_pc_stats(); | |
2806 Dependencies::print_statistics(); | |
2807 if (xtty != NULL) xtty->tail("statistics"); | |
2808 } | |
2809 | |
2810 #endif // PRODUCT |