Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 2212:d9e4d0aefc90
Small clean up to reduce delta to OpenJDK.
author | Thomas Wuerthinger <thomas.wuerthinger@gmail.com> |
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date | Mon, 21 Feb 2011 19:28:35 +0100 |
parents | 0cd39a385a72 |
children | 1cfdec4e7f07 |
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" | |
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37 #include "prims/jvmtiImpl.hpp" |
1972 | 38 #include "runtime/sharedRuntime.hpp" |
39 #include "runtime/sweeper.hpp" | |
40 #include "utilities/dtrace.hpp" | |
41 #include "utilities/events.hpp" | |
42 #include "utilities/xmlstream.hpp" | |
43 #ifdef SHARK | |
44 #include "shark/sharkCompiler.hpp" | |
45 #endif | |
0 | 46 |
47 #ifdef DTRACE_ENABLED | |
48 | |
49 // Only bother with this argument setup if dtrace is available | |
50 | |
51 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
52 const char*, int, const char*, int, const char*, int, void*, size_t); | |
53 | |
54 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
55 char*, int, char*, int, char*, int); | |
56 | |
57 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
58 { \ | |
59 methodOop m = (method); \ | |
60 if (m != NULL) { \ | |
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61 Symbol* klass_name = m->klass_name(); \ |
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62 Symbol* name = m->name(); \ |
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63 Symbol* signature = m->signature(); \ |
0 | 64 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
65 klass_name->bytes(), klass_name->utf8_length(), \ | |
66 name->bytes(), name->utf8_length(), \ | |
67 signature->bytes(), signature->utf8_length()); \ | |
68 } \ | |
69 } | |
70 | |
71 #else // ndef DTRACE_ENABLED | |
72 | |
73 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
74 | |
75 #endif | |
76 | |
77 bool nmethod::is_compiled_by_c1() const { | |
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78 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 79 if (is_native_method()) return false; |
80 return compiler()->is_c1(); | |
81 } | |
82 bool nmethod::is_compiled_by_c2() const { | |
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83 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 84 if (is_native_method()) return false; |
85 return compiler()->is_c2(); | |
86 } | |
1692 | 87 bool nmethod::is_compiled_by_shark() const { |
88 if (is_native_method()) return false; | |
89 assert(compiler() != NULL, "must be"); | |
90 return compiler()->is_shark(); | |
91 } | |
0 | 92 |
93 | |
94 | |
95 //--------------------------------------------------------------------------------- | |
96 // NMethod statistics | |
97 // They are printed under various flags, including: | |
98 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
99 // (In the latter two cases, they like other stats are printed to the log only.) | |
100 | |
101 #ifndef PRODUCT | |
102 // These variables are put into one block to reduce relocations | |
103 // and make it simpler to print from the debugger. | |
104 static | |
105 struct nmethod_stats_struct { | |
106 int nmethod_count; | |
107 int total_size; | |
108 int relocation_size; | |
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109 int consts_size; |
1748 | 110 int insts_size; |
0 | 111 int stub_size; |
112 int scopes_data_size; | |
113 int scopes_pcs_size; | |
114 int dependencies_size; | |
115 int handler_table_size; | |
116 int nul_chk_table_size; | |
117 int oops_size; | |
118 | |
119 void note_nmethod(nmethod* nm) { | |
120 nmethod_count += 1; | |
121 total_size += nm->size(); | |
122 relocation_size += nm->relocation_size(); | |
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123 consts_size += nm->consts_size(); |
1748 | 124 insts_size += nm->insts_size(); |
0 | 125 stub_size += nm->stub_size(); |
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126 oops_size += nm->oops_size(); |
0 | 127 scopes_data_size += nm->scopes_data_size(); |
128 scopes_pcs_size += nm->scopes_pcs_size(); | |
129 dependencies_size += nm->dependencies_size(); | |
130 handler_table_size += nm->handler_table_size(); | |
131 nul_chk_table_size += nm->nul_chk_table_size(); | |
132 } | |
133 void print_nmethod_stats() { | |
134 if (nmethod_count == 0) return; | |
135 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
136 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
137 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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138 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 139 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 140 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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141 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 142 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
143 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
144 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
145 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
146 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
147 } | |
148 | |
149 int native_nmethod_count; | |
150 int native_total_size; | |
151 int native_relocation_size; | |
1748 | 152 int native_insts_size; |
0 | 153 int native_oops_size; |
154 void note_native_nmethod(nmethod* nm) { | |
155 native_nmethod_count += 1; | |
156 native_total_size += nm->size(); | |
157 native_relocation_size += nm->relocation_size(); | |
1748 | 158 native_insts_size += nm->insts_size(); |
0 | 159 native_oops_size += nm->oops_size(); |
160 } | |
161 void print_native_nmethod_stats() { | |
162 if (native_nmethod_count == 0) return; | |
163 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
164 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
165 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 166 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 167 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
168 } | |
169 | |
170 int pc_desc_resets; // number of resets (= number of caches) | |
171 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
172 int pc_desc_approx; // number of those which have approximate true | |
173 int pc_desc_repeats; // number of _last_pc_desc hits | |
174 int pc_desc_hits; // number of LRU cache hits | |
175 int pc_desc_tests; // total number of PcDesc examinations | |
176 int pc_desc_searches; // total number of quasi-binary search steps | |
177 int pc_desc_adds; // number of LUR cache insertions | |
178 | |
179 void print_pc_stats() { | |
180 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
181 pc_desc_queries, | |
182 (double)(pc_desc_tests + pc_desc_searches) | |
183 / pc_desc_queries); | |
184 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
185 pc_desc_resets, | |
186 pc_desc_queries, pc_desc_approx, | |
187 pc_desc_repeats, pc_desc_hits, | |
188 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
189 } | |
190 } nmethod_stats; | |
191 #endif //PRODUCT | |
192 | |
193 //--------------------------------------------------------------------------------- | |
194 | |
195 | |
196 // The _unwind_handler is a special marker address, which says that | |
197 // for given exception oop and address, the frame should be removed | |
198 // as the tuple cannot be caught in the nmethod | |
199 address ExceptionCache::_unwind_handler = (address) -1; | |
200 | |
201 | |
202 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
203 assert(pc != NULL, "Must be non null"); | |
204 assert(exception.not_null(), "Must be non null"); | |
205 assert(handler != NULL, "Must be non null"); | |
206 | |
207 _count = 0; | |
208 _exception_type = exception->klass(); | |
209 _next = NULL; | |
210 | |
211 add_address_and_handler(pc,handler); | |
212 } | |
213 | |
214 | |
215 address ExceptionCache::match(Handle exception, address pc) { | |
216 assert(pc != NULL,"Must be non null"); | |
217 assert(exception.not_null(),"Must be non null"); | |
218 if (exception->klass() == exception_type()) { | |
219 return (test_address(pc)); | |
220 } | |
221 | |
222 return NULL; | |
223 } | |
224 | |
225 | |
226 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
227 assert(exception.not_null(),"Must be non null"); | |
228 if (exception->klass() == exception_type() && count() < cache_size) { | |
229 return true; | |
230 } | |
231 return false; | |
232 } | |
233 | |
234 | |
235 address ExceptionCache::test_address(address addr) { | |
236 for (int i=0; i<count(); i++) { | |
237 if (pc_at(i) == addr) { | |
238 return handler_at(i); | |
239 } | |
240 } | |
241 return NULL; | |
242 } | |
243 | |
244 | |
245 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
246 if (test_address(addr) == handler) return true; | |
247 if (count() < cache_size) { | |
248 set_pc_at(count(),addr); | |
249 set_handler_at(count(), handler); | |
250 increment_count(); | |
251 return true; | |
252 } | |
253 return false; | |
254 } | |
255 | |
256 | |
257 // private method for handling exception cache | |
258 // These methods are private, and used to manipulate the exception cache | |
259 // directly. | |
260 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
261 ExceptionCache* ec = exception_cache(); | |
262 while (ec != NULL) { | |
263 if (ec->match_exception_with_space(exception)) { | |
264 return ec; | |
265 } | |
266 ec = ec->next(); | |
267 } | |
268 return NULL; | |
269 } | |
270 | |
271 | |
272 //----------------------------------------------------------------------------- | |
273 | |
274 | |
275 // Helper used by both find_pc_desc methods. | |
276 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
277 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
278 if (!approximate) | |
279 return pc->pc_offset() == pc_offset; | |
280 else | |
281 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
282 } | |
283 | |
284 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
285 if (initial_pc_desc == NULL) { | |
286 _last_pc_desc = NULL; // native method | |
287 return; | |
288 } | |
289 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
290 // reset the cache by filling it with benign (non-null) values | |
291 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
292 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
293 for (int i = 0; i < cache_size; i++) | |
294 _pc_descs[i] = initial_pc_desc; | |
295 } | |
296 | |
297 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
298 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
299 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
300 | |
301 // In order to prevent race conditions do not load cache elements | |
302 // repeatedly, but use a local copy: | |
303 PcDesc* res; | |
304 | |
305 // Step one: Check the most recently returned value. | |
306 res = _last_pc_desc; | |
307 if (res == NULL) return NULL; // native method; no PcDescs at all | |
308 if (match_desc(res, pc_offset, approximate)) { | |
309 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
310 return res; | |
311 } | |
312 | |
313 // Step two: Check the LRU cache. | |
314 for (int i = 0; i < cache_size; i++) { | |
315 res = _pc_descs[i]; | |
316 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
317 if (match_desc(res, pc_offset, approximate)) { | |
318 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
319 _last_pc_desc = res; // record this cache hit in case of repeat | |
320 return res; | |
321 } | |
322 } | |
323 | |
324 // Report failure. | |
325 return NULL; | |
326 } | |
327 | |
328 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
329 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
330 // Update the LRU cache by shifting pc_desc forward: | |
331 for (int i = 0; i < cache_size; i++) { | |
332 PcDesc* next = _pc_descs[i]; | |
333 _pc_descs[i] = pc_desc; | |
334 pc_desc = next; | |
335 } | |
336 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
337 } | |
338 | |
339 // adjust pcs_size so that it is a multiple of both oopSize and | |
340 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
341 // of oopSize, then 2*sizeof(PcDesc) is) | |
342 static int adjust_pcs_size(int pcs_size) { | |
343 int nsize = round_to(pcs_size, oopSize); | |
344 if ((nsize % sizeof(PcDesc)) != 0) { | |
345 nsize = pcs_size + sizeof(PcDesc); | |
346 } | |
347 assert((nsize % oopSize) == 0, "correct alignment"); | |
348 return nsize; | |
349 } | |
350 | |
351 //----------------------------------------------------------------------------- | |
352 | |
353 | |
354 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
355 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
356 assert(new_entry != NULL,"Must be non null"); | |
357 assert(new_entry->next() == NULL, "Must be null"); | |
358 | |
359 if (exception_cache() != NULL) { | |
360 new_entry->set_next(exception_cache()); | |
361 } | |
362 set_exception_cache(new_entry); | |
363 } | |
364 | |
365 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
366 ExceptionCache* prev = NULL; | |
367 ExceptionCache* curr = exception_cache(); | |
368 assert(curr != NULL, "nothing to remove"); | |
369 // find the previous and next entry of ec | |
370 while (curr != ec) { | |
371 prev = curr; | |
372 curr = curr->next(); | |
373 assert(curr != NULL, "ExceptionCache not found"); | |
374 } | |
375 // now: curr == ec | |
376 ExceptionCache* next = curr->next(); | |
377 if (prev == NULL) { | |
378 set_exception_cache(next); | |
379 } else { | |
380 prev->set_next(next); | |
381 } | |
382 delete curr; | |
383 } | |
384 | |
385 | |
386 // public method for accessing the exception cache | |
387 // These are the public access methods. | |
388 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
389 // We never grab a lock to read the exception cache, so we may | |
390 // have false negatives. This is okay, as it can only happen during | |
391 // the first few exception lookups for a given nmethod. | |
392 ExceptionCache* ec = exception_cache(); | |
393 while (ec != NULL) { | |
394 address ret_val; | |
395 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
396 return ret_val; | |
397 } | |
398 ec = ec->next(); | |
399 } | |
400 return NULL; | |
401 } | |
402 | |
403 | |
404 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
405 // There are potential race conditions during exception cache updates, so we | |
406 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 407 // we don't lock during reads, it is possible to have several threads attempt |
0 | 408 // to update the cache with the same data. We need to check for already inserted |
409 // copies of the current data before adding it. | |
410 | |
411 MutexLocker ml(ExceptionCache_lock); | |
412 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
413 | |
414 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
415 target_entry = new ExceptionCache(exception,pc,handler); | |
416 add_exception_cache_entry(target_entry); | |
417 } | |
418 } | |
419 | |
420 | |
421 //-------------end of code for ExceptionCache-------------- | |
422 | |
423 | |
424 int nmethod::total_size() const { | |
425 return | |
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426 consts_size() + |
1748 | 427 insts_size() + |
0 | 428 stub_size() + |
429 scopes_data_size() + | |
430 scopes_pcs_size() + | |
431 handler_table_size() + | |
432 nul_chk_table_size(); | |
433 } | |
434 | |
435 const char* nmethod::compile_kind() const { | |
436 if (is_osr_method()) return "osr"; | |
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437 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 438 return NULL; |
439 } | |
440 | |
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441 // Fill in default values for various flag fields |
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442 void nmethod::init_defaults() { |
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443 _state = alive; |
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444 _marked_for_reclamation = 0; |
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445 _has_flushed_dependencies = 0; |
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446 _speculatively_disconnected = 0; |
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447 _has_unsafe_access = 0; |
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448 _has_method_handle_invokes = 0; |
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449 _marked_for_deoptimization = 0; |
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450 _lock_count = 0; |
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451 _stack_traversal_mark = 0; |
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452 _unload_reported = false; // jvmti state |
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453 |
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454 NOT_PRODUCT(_has_debug_info = false); |
1726 | 455 #ifdef ASSERT |
456 _oops_are_stale = false; | |
457 #endif | |
458 | |
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459 _oops_do_mark_link = NULL; |
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460 _jmethod_id = NULL; |
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461 _osr_link = NULL; |
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462 _scavenge_root_link = NULL; |
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463 _scavenge_root_state = 0; |
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464 _saved_nmethod_link = NULL; |
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465 _compiler = NULL; |
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466 |
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467 #ifdef HAVE_DTRACE_H |
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468 _trap_offset = 0; |
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469 #endif // def HAVE_DTRACE_H |
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470 } |
0 | 471 |
472 | |
473 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
474 CodeBuffer *code_buffer, | |
475 int vep_offset, | |
476 int frame_complete, | |
477 int frame_size, | |
478 ByteSize basic_lock_owner_sp_offset, | |
479 ByteSize basic_lock_sp_offset, | |
480 OopMapSet* oop_maps) { | |
481 // create nmethod | |
482 nmethod* nm = NULL; | |
483 { | |
484 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
485 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
486 CodeOffsets offsets; | |
487 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
488 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
489 nm = new (native_nmethod_size) | |
490 nmethod(method(), native_nmethod_size, &offsets, | |
491 code_buffer, frame_size, | |
492 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
493 oop_maps); | |
494 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
495 if (PrintAssembly && nm != NULL) | |
496 Disassembler::decode(nm); | |
497 } | |
498 // verify nmethod | |
499 debug_only(if (nm) nm->verify();) // might block | |
500 | |
501 if (nm != NULL) { | |
502 nm->log_new_nmethod(); | |
503 } | |
504 | |
505 return nm; | |
506 } | |
507 | |
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508 #ifdef HAVE_DTRACE_H |
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509 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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510 CodeBuffer *code_buffer, |
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511 int vep_offset, |
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512 int trap_offset, |
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513 int frame_complete, |
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514 int frame_size) { |
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515 // create nmethod |
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516 nmethod* nm = NULL; |
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517 { |
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518 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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519 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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520 CodeOffsets offsets; |
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521 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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522 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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523 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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524 |
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525 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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526 |
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527 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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528 if (PrintAssembly && nm != NULL) |
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529 Disassembler::decode(nm); |
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530 } |
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531 // verify nmethod |
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532 debug_only(if (nm) nm->verify();) // might block |
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533 |
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534 if (nm != NULL) { |
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535 nm->log_new_nmethod(); |
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536 } |
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537 |
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538 return nm; |
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539 } |
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540 |
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541 #endif // def HAVE_DTRACE_H |
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542 |
0 | 543 nmethod* nmethod::new_nmethod(methodHandle method, |
544 int compile_id, | |
545 int entry_bci, | |
546 CodeOffsets* offsets, | |
547 int orig_pc_offset, | |
548 DebugInformationRecorder* debug_info, | |
549 Dependencies* dependencies, | |
550 CodeBuffer* code_buffer, int frame_size, | |
551 OopMapSet* oop_maps, | |
552 ExceptionHandlerTable* handler_table, | |
553 ImplicitExceptionTable* nul_chk_table, | |
554 AbstractCompiler* compiler, | |
555 int comp_level | |
556 ) | |
557 { | |
558 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
559 // create nmethod | |
560 nmethod* nm = NULL; | |
561 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
562 int nmethod_size = | |
563 allocation_size(code_buffer, sizeof(nmethod)) | |
564 + adjust_pcs_size(debug_info->pcs_size()) | |
565 + round_to(dependencies->size_in_bytes() , oopSize) | |
566 + round_to(handler_table->size_in_bytes(), oopSize) | |
567 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
568 + round_to(debug_info->data_size() , oopSize); | |
569 nm = new (nmethod_size) | |
570 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
571 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
572 oop_maps, | |
573 handler_table, | |
574 nul_chk_table, | |
575 compiler, | |
576 comp_level); | |
577 if (nm != NULL) { | |
578 // To make dependency checking during class loading fast, record | |
579 // the nmethod dependencies in the classes it is dependent on. | |
580 // This allows the dependency checking code to simply walk the | |
581 // class hierarchy above the loaded class, checking only nmethods | |
582 // which are dependent on those classes. The slow way is to | |
583 // check every nmethod for dependencies which makes it linear in | |
584 // the number of methods compiled. For applications with a lot | |
585 // classes the slow way is too slow. | |
586 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
587 klassOop klass = deps.context_type(); | |
588 if (klass == NULL) continue; // ignore things like evol_method | |
589 | |
590 // record this nmethod as dependent on this klass | |
591 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
592 } | |
593 } | |
594 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
595 if (PrintAssembly && nm != NULL) | |
596 Disassembler::decode(nm); | |
597 } | |
598 | |
599 // verify nmethod | |
600 debug_only(if (nm) nm->verify();) // might block | |
601 | |
602 if (nm != NULL) { | |
603 nm->log_new_nmethod(); | |
604 } | |
605 | |
606 // done | |
607 return nm; | |
608 } | |
609 | |
610 | |
611 // For native wrappers | |
612 nmethod::nmethod( | |
613 methodOop method, | |
614 int nmethod_size, | |
615 CodeOffsets* offsets, | |
616 CodeBuffer* code_buffer, | |
617 int frame_size, | |
618 ByteSize basic_lock_owner_sp_offset, | |
619 ByteSize basic_lock_sp_offset, | |
620 OopMapSet* oop_maps ) | |
621 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
622 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 623 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
624 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 625 { |
626 { | |
627 debug_only(No_Safepoint_Verifier nsv;) | |
628 assert_locked_or_safepoint(CodeCache_lock); | |
629 | |
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630 init_defaults(); |
0 | 631 _method = method; |
632 _entry_bci = InvocationEntryBci; | |
633 // We have no exception handler or deopt handler make the | |
634 // values something that will never match a pc like the nmethod vtable entry | |
635 _exception_offset = 0; | |
636 _deoptimize_offset = 0; | |
1204 | 637 _deoptimize_mh_offset = 0; |
0 | 638 _orig_pc_offset = 0; |
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639 |
1748 | 640 _consts_offset = data_offset(); |
0 | 641 _stub_offset = data_offset(); |
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642 _oops_offset = data_offset(); |
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643 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 644 _scopes_pcs_offset = _scopes_data_offset; |
645 _dependencies_offset = _scopes_pcs_offset; | |
646 _handler_table_offset = _dependencies_offset; | |
647 _nul_chk_table_offset = _handler_table_offset; | |
648 _nmethod_end_offset = _nul_chk_table_offset; | |
649 _compile_id = 0; // default | |
650 _comp_level = CompLevel_none; | |
1748 | 651 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
652 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 653 _osr_entry_point = NULL; |
654 _exception_cache = NULL; | |
655 _pc_desc_cache.reset_to(NULL); | |
656 | |
657 code_buffer->copy_oops_to(this); | |
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658 debug_only(verify_scavenge_root_oops()); |
0 | 659 CodeCache::commit(this); |
660 } | |
661 | |
662 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
663 ttyLocker ttyl; // keep the following output all in one block | |
664 // This output goes directly to the tty, not the compiler log. | |
665 // To enable tools to match it up with the compilation activity, | |
666 // be sure to tag this tty output with the compile ID. | |
667 if (xtty != NULL) { | |
668 xtty->begin_head("print_native_nmethod"); | |
669 xtty->method(_method); | |
670 xtty->stamp(); | |
671 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
672 } | |
673 // print the header part first | |
674 print(); | |
675 // then print the requested information | |
676 if (PrintNativeNMethods) { | |
677 print_code(); | |
678 oop_maps->print(); | |
679 } | |
680 if (PrintRelocations) { | |
681 print_relocations(); | |
682 } | |
683 if (xtty != NULL) { | |
684 xtty->tail("print_native_nmethod"); | |
685 } | |
686 } | |
687 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
688 } | |
689 | |
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690 // For dtrace wrappers |
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691 #ifdef HAVE_DTRACE_H |
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692 nmethod::nmethod( |
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693 methodOop method, |
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694 int nmethod_size, |
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695 CodeOffsets* offsets, |
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696 CodeBuffer* code_buffer, |
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697 int frame_size) |
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698 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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699 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 700 _native_receiver_sp_offset(in_ByteSize(-1)), |
701 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
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702 { |
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703 { |
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704 debug_only(No_Safepoint_Verifier nsv;) |
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705 assert_locked_or_safepoint(CodeCache_lock); |
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706 |
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707 init_defaults(); |
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708 _method = method; |
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709 _entry_bci = InvocationEntryBci; |
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710 // We have no exception handler or deopt handler make the |
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711 // values something that will never match a pc like the nmethod vtable entry |
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712 _exception_offset = 0; |
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713 _deoptimize_offset = 0; |
1204 | 714 _deoptimize_mh_offset = 0; |
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715 _unwind_handler_offset = -1; |
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716 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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717 _orig_pc_offset = 0; |
1748 | 718 _consts_offset = data_offset(); |
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719 _stub_offset = data_offset(); |
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720 _oops_offset = data_offset(); |
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721 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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722 _scopes_pcs_offset = _scopes_data_offset; |
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723 _dependencies_offset = _scopes_pcs_offset; |
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724 _handler_table_offset = _dependencies_offset; |
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725 _nul_chk_table_offset = _handler_table_offset; |
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726 _nmethod_end_offset = _nul_chk_table_offset; |
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727 _compile_id = 0; // default |
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728 _comp_level = CompLevel_none; |
1748 | 729 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
730 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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731 _osr_entry_point = NULL; |
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732 _exception_cache = NULL; |
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733 _pc_desc_cache.reset_to(NULL); |
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734 |
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735 code_buffer->copy_oops_to(this); |
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736 debug_only(verify_scavenge_root_oops()); |
116
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737 CodeCache::commit(this); |
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738 } |
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739 |
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740 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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741 ttyLocker ttyl; // keep the following output all in one block |
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742 // This output goes directly to the tty, not the compiler log. |
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743 // To enable tools to match it up with the compilation activity, |
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744 // be sure to tag this tty output with the compile ID. |
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745 if (xtty != NULL) { |
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746 xtty->begin_head("print_dtrace_nmethod"); |
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747 xtty->method(_method); |
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748 xtty->stamp(); |
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749 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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750 } |
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751 // print the header part first |
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752 print(); |
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753 // then print the requested information |
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754 if (PrintNMethods) { |
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755 print_code(); |
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756 } |
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757 if (PrintRelocations) { |
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758 print_relocations(); |
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759 } |
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760 if (xtty != NULL) { |
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761 xtty->tail("print_dtrace_nmethod"); |
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762 } |
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763 } |
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764 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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765 } |
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766 #endif // def HAVE_DTRACE_H |
0 | 767 |
768 void* nmethod::operator new(size_t size, int nmethod_size) { | |
769 // Always leave some room in the CodeCache for I2C/C2I adapters | |
770 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
771 return CodeCache::allocate(nmethod_size); | |
772 } | |
773 | |
774 | |
775 nmethod::nmethod( | |
776 methodOop method, | |
777 int nmethod_size, | |
778 int compile_id, | |
779 int entry_bci, | |
780 CodeOffsets* offsets, | |
781 int orig_pc_offset, | |
782 DebugInformationRecorder* debug_info, | |
783 Dependencies* dependencies, | |
784 CodeBuffer *code_buffer, | |
785 int frame_size, | |
786 OopMapSet* oop_maps, | |
787 ExceptionHandlerTable* handler_table, | |
788 ImplicitExceptionTable* nul_chk_table, | |
789 AbstractCompiler* compiler, | |
790 int comp_level | |
791 ) | |
792 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
793 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 794 _native_receiver_sp_offset(in_ByteSize(-1)), |
795 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 796 { |
797 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
798 { | |
799 debug_only(No_Safepoint_Verifier nsv;) | |
800 assert_locked_or_safepoint(CodeCache_lock); | |
801 | |
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802 init_defaults(); |
0 | 803 _method = method; |
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804 _entry_bci = entry_bci; |
0 | 805 _compile_id = compile_id; |
806 _comp_level = comp_level; | |
807 _compiler = compiler; | |
808 _orig_pc_offset = orig_pc_offset; | |
1748 | 809 |
810 // Section offsets | |
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811 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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812 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 813 |
814 // Exception handler and deopt handler are in the stub section | |
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815 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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816 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1429
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817 if (UseC1X) { |
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818 // c1x produces no (!) stub section |
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819 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions); |
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820 _deoptimize_offset = code_offset() + offsets->value(CodeOffsets::Deopt); |
2106 | 821 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
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822 _deoptimize_mh_offset = code_offset() + offsets->value(CodeOffsets::DeoptMH); |
1930 | 823 } else { |
824 _deoptimize_mh_offset = -1; | |
825 } | |
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826 } else { |
1930 | 827 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
828 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
2106 | 829 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1930 | 830 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
831 } else { | |
832 _deoptimize_mh_offset = -1; | |
833 } | |
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834 } |
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835 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 836 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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837 } else { |
1748 | 838 _unwind_handler_offset = -1; |
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839 } |
1748 | 840 |
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841 _oops_offset = data_offset(); |
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842 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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843 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 844 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
845 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
846 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
847 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
848 | |
1748 | 849 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
850 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
851 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 852 _exception_cache = NULL; |
853 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
854 | |
855 // Copy contents of ScopeDescRecorder to nmethod | |
856 code_buffer->copy_oops_to(this); | |
857 debug_info->copy_to(this); | |
858 dependencies->copy_to(this); | |
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859 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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860 CodeCache::add_scavenge_root_nmethod(this); |
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861 } |
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862 debug_only(verify_scavenge_root_oops()); |
0 | 863 |
864 CodeCache::commit(this); | |
865 | |
866 // Copy contents of ExceptionHandlerTable to nmethod | |
867 handler_table->copy_to(this); | |
868 nul_chk_table->copy_to(this); | |
869 | |
870 // we use the information of entry points to find out if a method is | |
871 // static or non static | |
872 assert(compiler->is_c2() || | |
873 _method->is_static() == (entry_point() == _verified_entry_point), | |
874 " entry points must be same for static methods and vice versa"); | |
875 } | |
876 | |
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877 bool printnmethods = PrintNMethods |
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878 || CompilerOracle::should_print(_method) |
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879 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 880 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
881 print_nmethod(printnmethods); | |
882 } | |
883 | |
884 // Note: Do not verify in here as the CodeCache_lock is | |
885 // taken which would conflict with the CompiledIC_lock | |
886 // which taken during the verification of call sites. | |
887 // (was bug - gri 10/25/99) | |
888 | |
889 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
890 } | |
891 | |
892 | |
893 // Print a short set of xml attributes to identify this nmethod. The | |
894 // output should be embedded in some other element. | |
895 void nmethod::log_identity(xmlStream* log) const { | |
896 log->print(" compile_id='%d'", compile_id()); | |
897 const char* nm_kind = compile_kind(); | |
898 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
899 if (compiler() != NULL) { | |
900 log->print(" compiler='%s'", compiler()->name()); | |
901 } | |
1783 | 902 if (TieredCompilation) { |
903 log->print(" level='%d'", comp_level()); | |
904 } | |
0 | 905 } |
906 | |
907 | |
908 #define LOG_OFFSET(log, name) \ | |
909 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
910 log->print(" " XSTR(name) "_offset='%d'" , \ | |
911 (intptr_t)name##_begin() - (intptr_t)this) | |
912 | |
913 | |
914 void nmethod::log_new_nmethod() const { | |
915 if (LogCompilation && xtty != NULL) { | |
916 ttyLocker ttyl; | |
917 HandleMark hm; | |
918 xtty->begin_elem("nmethod"); | |
919 log_identity(xtty); | |
1748 | 920 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 921 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
922 | |
923 LOG_OFFSET(xtty, relocation); | |
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924 LOG_OFFSET(xtty, consts); |
1748 | 925 LOG_OFFSET(xtty, insts); |
0 | 926 LOG_OFFSET(xtty, stub); |
927 LOG_OFFSET(xtty, scopes_data); | |
928 LOG_OFFSET(xtty, scopes_pcs); | |
929 LOG_OFFSET(xtty, dependencies); | |
930 LOG_OFFSET(xtty, handler_table); | |
931 LOG_OFFSET(xtty, nul_chk_table); | |
932 LOG_OFFSET(xtty, oops); | |
933 | |
934 xtty->method(method()); | |
935 xtty->stamp(); | |
936 xtty->end_elem(); | |
937 } | |
938 } | |
939 | |
940 #undef LOG_OFFSET | |
941 | |
942 | |
1783 | 943 void nmethod::print_compilation(outputStream *st, const char *method_name, const char *title, |
944 methodOop method, bool is_blocking, int compile_id, int bci, int comp_level) { | |
945 bool is_synchronized = false, has_xhandler = false, is_native = false; | |
946 int code_size = -1; | |
947 if (method != NULL) { | |
948 is_synchronized = method->is_synchronized(); | |
949 has_xhandler = method->has_exception_handler(); | |
950 is_native = method->is_native(); | |
951 code_size = method->code_size(); | |
952 } | |
953 // print compilation number | |
954 st->print("%7d %3d", (int)tty->time_stamp().milliseconds(), compile_id); | |
955 | |
956 // print method attributes | |
957 const bool is_osr = bci != InvocationEntryBci; | |
958 const char blocking_char = is_blocking ? 'b' : ' '; | |
959 const char compile_type = is_osr ? '%' : ' '; | |
960 const char sync_char = is_synchronized ? 's' : ' '; | |
961 const char exception_char = has_xhandler ? '!' : ' '; | |
962 const char native_char = is_native ? 'n' : ' '; | |
963 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); | |
964 if (TieredCompilation) { | |
965 st->print("%d ", comp_level); | |
966 } | |
967 | |
968 // print optional title | |
969 bool do_nl = false; | |
970 if (title != NULL) { | |
971 int tlen = (int) strlen(title); | |
972 bool do_nl = false; | |
973 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } | |
974 st->print("%.*s", tlen, title); | |
975 } else { | |
976 do_nl = true; | |
977 } | |
978 | |
979 // print method name string if given | |
980 if (method_name != NULL) { | |
981 st->print(method_name); | |
982 } else { | |
983 // otherwise as the method to print itself | |
984 if (method != NULL && !Universe::heap()->is_gc_active()) { | |
985 method->print_short_name(st); | |
986 } else { | |
987 st->print("(method)"); | |
988 } | |
989 } | |
990 | |
991 if (method != NULL) { | |
992 // print osr_bci if any | |
993 if (is_osr) st->print(" @ %d", bci); | |
994 // print method size | |
995 st->print(" (%d bytes)", code_size); | |
996 } | |
997 if (do_nl) st->cr(); | |
998 } | |
999 | |
0 | 1000 // Print out more verbose output usually for a newly created nmethod. |
1001 void nmethod::print_on(outputStream* st, const char* title) const { | |
1002 if (st != NULL) { | |
1003 ttyLocker ttyl; | |
1783 | 1004 print_compilation(st, /*method_name*/NULL, title, |
1005 method(), /*is_blocking*/false, | |
1784
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1006 compile_id(), |
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1007 is_osr_method() ? osr_entry_bci() : InvocationEntryBci, |
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1008 comp_level()); |
0 | 1009 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
1010 } | |
1011 } | |
1012 | |
1013 | |
1014 void nmethod::print_nmethod(bool printmethod) { | |
1015 ttyLocker ttyl; // keep the following output all in one block | |
1016 if (xtty != NULL) { | |
1017 xtty->begin_head("print_nmethod"); | |
1018 xtty->stamp(); | |
1019 xtty->end_head(); | |
1020 } | |
1021 // print the header part first | |
1022 print(); | |
1023 // then print the requested information | |
1024 if (printmethod) { | |
1025 print_code(); | |
1026 print_pcs(); | |
1027 oop_maps()->print(); | |
1028 } | |
1029 if (PrintDebugInfo) { | |
1030 print_scopes(); | |
1031 } | |
1032 if (PrintRelocations) { | |
1033 print_relocations(); | |
1034 } | |
1035 if (PrintDependencies) { | |
1036 print_dependencies(); | |
1037 } | |
1038 if (PrintExceptionHandlers) { | |
1039 print_handler_table(); | |
1040 print_nul_chk_table(); | |
1041 } | |
1042 if (xtty != NULL) { | |
1043 xtty->tail("print_nmethod"); | |
1044 } | |
1045 } | |
1046 | |
1047 | |
1563
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1048 // Promote one word from an assembly-time handle to a live embedded oop. |
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1049 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1050 if (handle == NULL || |
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1051 // As a special case, IC oops are initialized to 1 or -1. |
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1052 handle == (jobject) Universe::non_oop_word()) { |
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1053 (*dest) = (oop) handle; |
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1054 } else { |
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1055 (*dest) = JNIHandles::resolve_non_null(handle); |
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1056 } |
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1057 } |
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1058 |
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1059 |
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1060 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1061 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1062 int length = array->length(); |
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1063 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1064 oop* dest = oops_begin(); |
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1065 for (int index = 0 ; index < length; index++) { |
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1066 initialize_immediate_oop(&dest[index], array->at(index)); |
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1067 } |
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1068 |
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1069 // Now we can fix up all the oops in the code. We need to do this |
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1070 // in the code because the assembler uses jobjects as placeholders. |
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1071 // The code and relocations have already been initialized by the |
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1072 // CodeBlob constructor, so it is valid even at this early point to |
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1073 // iterate over relocations and patch the code. |
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1074 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1075 } |
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1076 |
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1077 |
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1078 bool nmethod::is_at_poll_return(address pc) { |
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1079 RelocIterator iter(this, pc, pc+1); |
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1080 while (iter.next()) { |
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1081 if (iter.type() == relocInfo::poll_return_type) |
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1082 return true; |
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1083 } |
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1084 return false; |
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1085 } |
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1086 |
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1087 |
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1088 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1089 RelocIterator iter(this, pc, pc+1); |
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1090 while (iter.next()) { |
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1091 relocInfo::relocType t = iter.type(); |
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1092 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1093 return true; |
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1094 } |
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1095 return false; |
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1096 } |
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1097 |
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1098 |
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1099 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1100 // re-patch all oop-bearing instructions, just in case some oops moved |
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1101 RelocIterator iter(this, begin, end); |
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1102 while (iter.next()) { |
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1103 if (iter.type() == relocInfo::oop_type) { |
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1104 oop_Relocation* reloc = iter.oop_reloc(); |
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1105 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1106 oop* dest = reloc->oop_addr(); |
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1107 initialize_immediate_oop(dest, (jobject) *dest); |
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1108 } |
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1109 // Refresh the oop-related bits of this instruction. |
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1110 reloc->fix_oop_relocation(); |
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1111 } |
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1112 |
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1113 // There must not be any interfering patches or breakpoints. |
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1114 assert(!(iter.type() == relocInfo::breakpoint_type |
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1115 && iter.breakpoint_reloc()->active()), |
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1116 "no active breakpoint"); |
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1117 } |
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1118 } |
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1119 |
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1120 |
0 | 1121 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1122 PcDesc* pd = pc_desc_at(pc); | |
1937
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|
1123 #ifdef ASSERT |
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1124 if (pd == NULL) { |
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diff
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1125 tty->print_cr(err_msg("Missing scope at relative pc %d of method %s", pc - code_begin(), this->method()->name()->as_C_string())); |
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1126 print_pcs(); |
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1127 } |
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1128 #endif |
0 | 1129 guarantee(pd != NULL, "scope must be present"); |
1130 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1131 pd->obj_decode_offset(), pd->should_reexecute(), |
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1132 pd->return_oop()); |
0 | 1133 } |
1134 | |
1135 | |
1136 void nmethod::clear_inline_caches() { | |
1137 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1138 if (is_zombie()) { | |
1139 return; | |
1140 } | |
1141 | |
1142 RelocIterator iter(this); | |
1143 while (iter.next()) { | |
1144 iter.reloc()->clear_inline_cache(); | |
1145 } | |
1146 } | |
1147 | |
1148 | |
1149 void nmethod::cleanup_inline_caches() { | |
1150 | |
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1151 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1152 |
1153 // If the method is not entrant or zombie then a JMP is plastered over the | |
1154 // first few bytes. If an oop in the old code was there, that oop | |
1155 // should not get GC'd. Skip the first few bytes of oops on | |
1156 // not-entrant methods. | |
1157 address low_boundary = verified_entry_point(); | |
1158 if (!is_in_use()) { | |
1159 low_boundary += NativeJump::instruction_size; | |
1160 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1161 // This means that the low_boundary is going to be a little too high. | |
1162 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1163 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1164 } | |
1165 | |
1166 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1167 ResourceMark rm; | |
1168 RelocIterator iter(this, low_boundary); | |
1169 while(iter.next()) { | |
1170 switch(iter.type()) { | |
1171 case relocInfo::virtual_call_type: | |
1172 case relocInfo::opt_virtual_call_type: { | |
1173 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1174 // Ok, to lookup references to zombies here | |
1175 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1176 if( cb != NULL && cb->is_nmethod() ) { | |
1177 nmethod* nm = (nmethod*)cb; | |
1178 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1179 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1180 } |
1181 break; | |
1182 } | |
1183 case relocInfo::static_call_type: { | |
1184 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1185 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1186 if( cb != NULL && cb->is_nmethod() ) { | |
1187 nmethod* nm = (nmethod*)cb; | |
1188 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1189 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1190 } |
1191 break; | |
1192 } | |
1193 } | |
1194 } | |
1195 } | |
1196 | |
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1197 // This is a private interface with the sweeper. |
0 | 1198 void nmethod::mark_as_seen_on_stack() { |
1199 assert(is_not_entrant(), "must be a non-entrant method"); | |
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1200 // Set the traversal mark to ensure that the sweeper does 2 |
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1201 // cleaning passes before moving to zombie. |
0 | 1202 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1203 } | |
1204 | |
1205 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
1206 bool nmethod::can_not_entrant_be_converted() { | |
1207 assert(is_not_entrant(), "must be a non-entrant method"); | |
1208 | |
1209 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1210 // count can be greater than the stack traversal count before it hits the | |
1211 // nmethod for the second time. | |
1212 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
1213 } | |
1214 | |
1215 void nmethod::inc_decompile_count() { | |
1783 | 1216 if (!is_compiled_by_c2()) return; |
0 | 1217 // Could be gated by ProfileTraps, but do not bother... |
1218 methodOop m = method(); | |
1219 if (m == NULL) return; | |
1220 methodDataOop mdo = m->method_data(); | |
1221 if (mdo == NULL) return; | |
1222 // There is a benign race here. See comments in methodDataOop.hpp. | |
1223 mdo->inc_decompile_count(); | |
1224 } | |
1225 | |
1226 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1227 | |
1228 post_compiled_method_unload(); | |
1229 | |
1230 // Since this nmethod is being unloaded, make sure that dependencies | |
1231 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1232 // indicate that this work is being done during a GC. | |
1233 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1234 assert(is_alive != NULL, "Should be non-NULL"); | |
1235 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1236 flush_dependencies(is_alive); | |
1237 | |
1238 // Break cycle between nmethod & method | |
1239 if (TraceClassUnloading && WizardMode) { | |
1240 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1241 " unloadable], methodOop(" INTPTR_FORMAT | |
1242 "), cause(" INTPTR_FORMAT ")", | |
1243 this, (address)_method, (address)cause); | |
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1244 if (!Universe::heap()->is_gc_active()) |
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1245 cause->klass()->print(); |
0 | 1246 } |
941 | 1247 // Unlink the osr method, so we do not look this up again |
1248 if (is_osr_method()) { | |
1249 invalidate_osr_method(); | |
1250 } | |
0 | 1251 // If _method is already NULL the methodOop is about to be unloaded, |
1252 // so we don't have to break the cycle. Note that it is possible to | |
1253 // have the methodOop live here, in case we unload the nmethod because | |
1254 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1255 if (_method != NULL) { | |
1256 // OSR methods point to the methodOop, but the methodOop does not | |
1257 // point back! | |
1258 if (_method->code() == this) { | |
1259 _method->clear_code(); // Break a cycle | |
1260 } | |
1261 _method = NULL; // Clear the method of this dead nmethod | |
1262 } | |
1263 // Make the class unloaded - i.e., change state and notify sweeper | |
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1264 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1265 if (is_in_use()) { |
1266 // Transitioning directly from live to unloaded -- so | |
1267 // we need to force a cache clean-up; remember this | |
1268 // for later on. | |
1269 CodeCache::set_needs_cache_clean(true); | |
1270 } | |
1644
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1271 _state = unloaded; |
0 | 1272 |
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1273 // Log the unloading. |
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1274 log_state_change(); |
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1275 |
0 | 1276 // The methodOop is gone at this point |
1277 assert(_method == NULL, "Tautology"); | |
1278 | |
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1279 set_osr_link(NULL); |
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1280 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1281 NMethodSweeper::notify(this); |
1282 } | |
1283 | |
1284 void nmethod::invalidate_osr_method() { | |
1285 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1286 // Remove from list of active nmethods | |
1287 if (method() != NULL) | |
1288 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1289 // Set entry as invalid | |
1290 _entry_bci = InvalidOSREntryBci; | |
1291 } | |
1292 | |
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1293 void nmethod::log_state_change() const { |
0 | 1294 if (LogCompilation) { |
1295 if (xtty != NULL) { | |
1296 ttyLocker ttyl; // keep the following output all in one block | |
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1297 if (_state == unloaded) { |
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1298 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1299 os::current_thread_id()); |
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1300 } else { |
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1301 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1302 os::current_thread_id(), |
1644
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1303 (_state == zombie ? " zombie='1'" : "")); |
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1304 } |
0 | 1305 log_identity(xtty); |
1306 xtty->stamp(); | |
1307 xtty->end_elem(); | |
1308 } | |
1309 } | |
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1310 if (PrintCompilation && _state != unloaded) { |
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1311 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
0 | 1312 tty->cr(); |
1313 } | |
1314 } | |
1315 | |
1316 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1317 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1318 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
1319 | |
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1320 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1321 nmethodLocker nml(this); |
1644
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1322 methodHandle the_method(method()); |
1726 | 1323 No_Safepoint_Verifier nsv; |
0 | 1324 |
1325 { | |
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1326 // If the method is already zombie there is nothing to do |
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1327 if (is_zombie()) { |
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1328 return false; |
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1329 } |
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1330 |
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1331 // invalidate osr nmethod before acquiring the patching lock since |
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1332 // they both acquire leaf locks and we don't want a deadlock. |
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1333 // This logic is equivalent to the logic below for patching the |
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1334 // verified entry point of regular methods. |
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1335 if (is_osr_method()) { |
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1336 // this effectively makes the osr nmethod not entrant |
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1337 invalidate_osr_method(); |
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1338 } |
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1339 |
0 | 1340 // Enter critical section. Does not block for safepoint. |
1341 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1342 |
1644
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1343 if (_state == state) { |
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1344 // another thread already performed this transition so nothing |
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1345 // to do, but return false to indicate this. |
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1346 return false; |
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1347 } |
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1348 |
0 | 1349 // The caller can be calling the method statically or through an inline |
1350 // cache call. | |
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1351 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1352 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1353 SharedRuntime::get_handle_wrong_method_stub()); | |
1354 } | |
1355 | |
1644
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1356 if (is_in_use()) { |
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1357 // It's a true state change, so mark the method as decompiled. |
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1358 // Do it only for transition from alive. |
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1359 inc_decompile_count(); |
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1360 } |
1206
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1361 |
0 | 1362 // Change state |
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1363 _state = state; |
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1364 |
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1365 // Log the transition once |
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1366 log_state_change(); |
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1367 |
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1368 // Remove nmethod from method. |
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1369 // We need to check if both the _code and _from_compiled_code_entry_point |
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1370 // refer to this nmethod because there is a race in setting these two fields |
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1371 // in methodOop as seen in bugid 4947125. |
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1372 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1373 // could be flushed and the compiler and vtable stubs could still call |
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1374 // through it. |
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1375 if (method() != NULL && (method()->code() == this || |
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1376 method()->from_compiled_entry() == verified_entry_point())) { |
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1377 HandleMark hm; |
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1378 method()->clear_code(); |
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1379 } |
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1380 |
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1381 if (state == not_entrant) { |
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1382 mark_as_seen_on_stack(); |
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1383 } |
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1384 |
0 | 1385 } // leave critical region under Patching_lock |
1386 | |
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1387 // When the nmethod becomes zombie it is no longer alive so the |
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1388 // dependencies must be flushed. nmethods in the not_entrant |
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1389 // state will be flushed later when the transition to zombie |
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1390 // happens or they get unloaded. |
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1391 if (state == zombie) { |
1726 | 1392 { |
1393 // Flushing dependecies must be done before any possible | |
1394 // safepoint can sneak in, otherwise the oops used by the | |
1395 // dependency logic could have become stale. | |
1396 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1397 flush_dependencies(NULL); | |
1398 } | |
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1399 |
1726 | 1400 { |
1401 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
1402 // and it hasn't already been reported for this nmethod then report it now. | |
1403 // (the event may have been reported earilier if the GC marked it for unloading). | |
1404 Pause_No_Safepoint_Verifier pnsv(&nsv); | |
1405 post_compiled_method_unload(); | |
1406 } | |
1407 | |
1408 #ifdef ASSERT | |
1409 // It's no longer safe to access the oops section since zombie | |
1410 // nmethods aren't scanned for GC. | |
1411 _oops_are_stale = true; | |
1412 #endif | |
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1413 } else { |
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1414 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1415 } |
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1416 |
0 | 1417 if (TraceCreateZombies) { |
1418 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1419 } | |
1420 | |
1421 // Make sweeper aware that there is a zombie method that needs to be removed | |
1422 NMethodSweeper::notify(this); | |
1423 | |
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1424 return true; |
0 | 1425 } |
1426 | |
1427 void nmethod::flush() { | |
1428 // Note that there are no valid oops in the nmethod anymore. | |
1429 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1430 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1431 | |
1432 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1433 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1434 |
1435 // completely deallocate this method | |
1436 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1437 if (PrintMethodFlushing) { | |
1202 | 1438 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1439 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1440 } |
1441 | |
1442 // We need to deallocate any ExceptionCache data. | |
1443 // Note that we do not need to grab the nmethod lock for this, it | |
1444 // better be thread safe if we're disposing of it! | |
1445 ExceptionCache* ec = exception_cache(); | |
1446 set_exception_cache(NULL); | |
1447 while(ec != NULL) { | |
1448 ExceptionCache* next = ec->next(); | |
1449 delete ec; | |
1450 ec = next; | |
1451 } | |
1452 | |
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1453 if (on_scavenge_root_list()) { |
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1454 CodeCache::drop_scavenge_root_nmethod(this); |
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1455 } |
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1456 |
1202 | 1457 if (is_speculatively_disconnected()) { |
1458 CodeCache::remove_saved_code(this); | |
1459 } | |
1460 | |
1692 | 1461 #ifdef SHARK |
1845
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1462 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1463 #endif // SHARK |
1464 | |
0 | 1465 ((CodeBlob*)(this))->flush(); |
1466 | |
1467 CodeCache::free(this); | |
1468 } | |
1469 | |
1470 | |
1471 // | |
1472 // Notify all classes this nmethod is dependent on that it is no | |
1473 // longer dependent. This should only be called in two situations. | |
1474 // First, when a nmethod transitions to a zombie all dependents need | |
1475 // to be clear. Since zombification happens at a safepoint there's no | |
1476 // synchronization issues. The second place is a little more tricky. | |
1477 // During phase 1 of mark sweep class unloading may happen and as a | |
1478 // result some nmethods may get unloaded. In this case the flushing | |
1479 // of dependencies must happen during phase 1 since after GC any | |
1480 // dependencies in the unloaded nmethod won't be updated, so | |
1481 // traversing the dependency information in unsafe. In that case this | |
1482 // function is called with a non-NULL argument and this function only | |
1483 // notifies instanceKlasses that are reachable | |
1484 | |
1485 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1486 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1487 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1488 "is_alive is non-NULL if and only if we are called during GC"); | |
1489 if (!has_flushed_dependencies()) { | |
1490 set_has_flushed_dependencies(); | |
1491 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1492 klassOop klass = deps.context_type(); | |
1493 if (klass == NULL) continue; // ignore things like evol_method | |
1494 | |
1495 // During GC the is_alive closure is non-NULL, and is used to | |
1496 // determine liveness of dependees that need to be updated. | |
1497 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1498 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1499 } | |
1500 } | |
1501 } | |
1502 } | |
1503 | |
1504 | |
1505 // If this oop is not live, the nmethod can be unloaded. | |
1506 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1507 OopClosure* keep_alive, | |
1508 oop* root, bool unloading_occurred) { | |
1509 assert(root != NULL, "just checking"); | |
1510 oop obj = *root; | |
1511 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1512 return false; | |
1513 } | |
1514 if (obj->is_compiledICHolder()) { | |
1515 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1516 if (is_alive->do_object_b( | |
1517 cichk_oop->holder_method()->method_holder()) && | |
1518 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1519 // The oop should be kept alive | |
1520 keep_alive->do_oop(root); | |
1521 return false; | |
1522 } | |
1523 } | |
989
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1524 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1525 // simply because one of its constant oops has gone dead. |
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1526 // No actual classes need to be unloaded in order for this to occur. |
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1527 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1528 make_unloaded(is_alive, obj); |
1529 return true; | |
1530 } | |
1531 | |
1532 // ------------------------------------------------------------------ | |
1533 // post_compiled_method_load_event | |
1534 // new method for install_code() path | |
1535 // Transfer information from compilation to jvmti | |
1536 void nmethod::post_compiled_method_load_event() { | |
1537 | |
1538 methodOop moop = method(); | |
1539 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1540 moop->klass_name()->bytes(), | |
1541 moop->klass_name()->utf8_length(), | |
1542 moop->name()->bytes(), | |
1543 moop->name()->utf8_length(), | |
1544 moop->signature()->bytes(), | |
1545 moop->signature()->utf8_length(), | |
1748 | 1546 insts_begin(), insts_size()); |
0 | 1547 |
1616
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1548 if (JvmtiExport::should_post_compiled_method_load() || |
38e8278318ca
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1549 JvmtiExport::should_post_compiled_method_unload()) { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
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1550 get_and_cache_jmethod_id(); |
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|
1551 } |
38e8278318ca
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|
1552 |
0 | 1553 if (JvmtiExport::should_post_compiled_method_load()) { |
2195
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1554 // Let the Service thread (which is a real Java thread) post the event |
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1555 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1556 JvmtiDeferredEventQueue::enqueue( |
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1557 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1558 } |
1559 } | |
1560 | |
1616
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6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
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1561 jmethodID nmethod::get_and_cache_jmethod_id() { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
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|
1562 if (_jmethod_id == NULL) { |
38e8278318ca
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|
1563 // Cache the jmethod_id since it can no longer be looked up once the |
38e8278318ca
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never
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1564 // method itself has been marked for unloading. |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
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|
1565 _jmethod_id = method()->jmethod_id(); |
38e8278318ca
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parents:
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|
1566 } |
38e8278318ca
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|
1567 return _jmethod_id; |
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parents:
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|
1568 } |
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parents:
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diff
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|
1569 |
0 | 1570 void nmethod::post_compiled_method_unload() { |
1577
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parents:
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diff
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|
1571 if (unload_reported()) { |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
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parents:
1563
diff
changeset
|
1572 // 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
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|
1573 // 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
|
1574 return; |
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6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
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parents:
1563
diff
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|
1575 } |
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6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
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parents:
1563
diff
changeset
|
1576 |
0 | 1577 assert(_method != NULL && !is_unloaded(), "just checking"); |
1578 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1579 | |
1580 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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parents:
1602
diff
changeset
|
1581 // post the event. Sometime later this nmethod will be made a zombie |
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never
parents:
1602
diff
changeset
|
1582 // 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
|
1583 // If the _jmethod_id is null then no load event was ever requested |
38e8278318ca
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never
parents:
1602
diff
changeset
|
1584 // 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
|
1585 // that the jmethodID is a weak reference to the methodOop so if |
38e8278318ca
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never
parents:
1602
diff
changeset
|
1586 // it's being unloaded there's no way to look it up since the weak |
38e8278318ca
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never
parents:
1602
diff
changeset
|
1587 // ref will have been cleared. |
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6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
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parents:
1602
diff
changeset
|
1588 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1589 assert(!unload_reported(), "already unloaded"); |
2195
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kamg
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2177
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|
1590 JvmtiDeferredEvent event = |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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2177
diff
changeset
|
1591 JvmtiDeferredEvent::compiled_method_unload_event( |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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2177
diff
changeset
|
1592 _jmethod_id, insts_begin()); |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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2177
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changeset
|
1593 if (SafepointSynchronize::is_at_safepoint()) { |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
diff
changeset
|
1594 // Don't want to take the queueing lock. Add it as pending and |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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2177
diff
changeset
|
1595 // it will get enqueued later. |
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6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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2177
diff
changeset
|
1596 JvmtiDeferredEventQueue::add_pending_event(event); |
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6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
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|
1597 } else { |
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6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
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2177
diff
changeset
|
1598 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
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2177
diff
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|
1599 JvmtiDeferredEventQueue::enqueue(event); |
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6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
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|
1600 } |
0 | 1601 } |
1602 | |
1603 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1604 // any time. As the nmethod is being unloaded now we mark it has | |
1605 // having the unload event reported - this will ensure that we don't | |
1606 // attempt to report the event in the unlikely scenario where the | |
1607 // event is enabled at the time the nmethod is made a zombie. | |
1608 set_unload_reported(); | |
1609 } | |
1610 | |
1611 // This is called at the end of the strong tracing/marking phase of a | |
1612 // GC to unload an nmethod if it contains otherwise unreachable | |
1613 // oops. | |
1614 | |
1615 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1616 OopClosure* keep_alive, bool unloading_occurred) { | |
1617 // Make sure the oop's ready to receive visitors | |
1618 assert(!is_zombie() && !is_unloaded(), | |
1619 "should not call follow on zombie or unloaded nmethod"); | |
1620 | |
1621 // If the method is not entrant then a JMP is plastered over the | |
1622 // first few bytes. If an oop in the old code was there, that oop | |
1623 // should not get GC'd. Skip the first few bytes of oops on | |
1624 // not-entrant methods. | |
1625 address low_boundary = verified_entry_point(); | |
1626 if (is_not_entrant()) { | |
1627 low_boundary += NativeJump::instruction_size; | |
1628 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1629 // (See comment above.) | |
1630 } | |
1631 | |
1632 // The RedefineClasses() API can cause the class unloading invariant | |
1633 // to no longer be true. See jvmtiExport.hpp for details. | |
1634 // Also, leave a debugging breadcrumb in local flag. | |
1635 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1636 if (a_class_was_redefined) { | |
1637 // This set of the unloading_occurred flag is done before the | |
1638 // call to post_compiled_method_unload() so that the unloading | |
1639 // of this nmethod is reported. | |
1640 unloading_occurred = true; | |
1641 } | |
1642 | |
1643 // Follow methodOop | |
1644 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1645 return; | |
1646 } | |
1647 | |
1648 // Exception cache | |
1649 ExceptionCache* ec = exception_cache(); | |
1650 while (ec != NULL) { | |
1651 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1652 oop ex = *ex_addr; | |
1653 ExceptionCache* next_ec = ec->next(); | |
1654 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1655 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1656 remove_from_exception_cache(ec); | |
1657 } | |
1658 ec = next_ec; | |
1659 } | |
1660 | |
1661 // If class unloading occurred we first iterate over all inline caches and | |
1662 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1663 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1664 // iteration below. | |
1665 if (unloading_occurred) { | |
1666 RelocIterator iter(this, low_boundary); | |
1667 while(iter.next()) { | |
1668 if (iter.type() == relocInfo::virtual_call_type) { | |
1669 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1670 oop ic_oop = ic->cached_oop(); | |
1671 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1672 // The only exception is compiledICHolder oops which may | |
1673 // yet be marked below. (We check this further below). | |
1674 if (ic_oop->is_compiledICHolder()) { | |
1675 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1676 if (is_alive->do_object_b( | |
1677 cichk_oop->holder_method()->method_holder()) && | |
1678 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1679 continue; | |
1680 } | |
1681 } | |
1682 ic->set_to_clean(); | |
1489
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
1378
diff
changeset
|
1683 assert(ic->cached_oop() == NULL, |
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
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diff
changeset
|
1684 "cached oop in IC should be cleared"); |
0 | 1685 } |
1686 } | |
1687 } | |
1688 } | |
1689 | |
1690 // Compiled code | |
1691 RelocIterator iter(this, low_boundary); | |
1692 while (iter.next()) { | |
1693 if (iter.type() == relocInfo::oop_type) { | |
1694 oop_Relocation* r = iter.oop_reloc(); | |
1695 // In this loop, we must only traverse those oops directly embedded in | |
1696 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1697 assert(1 == (r->oop_is_immediate()) + | |
1698 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1699 "oop must be found in exactly one place"); | |
1700 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1701 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1702 return; | |
1703 } | |
1704 } | |
1705 } | |
1706 } | |
1707 | |
1708 | |
1709 // Scopes | |
1710 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1711 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1712 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1713 return; | |
1714 } | |
1715 } | |
1716 | |
1717 #ifndef PRODUCT | |
1718 // This nmethod was not unloaded; check below that all CompiledICs | |
1719 // refer to marked oops. | |
1720 { | |
1721 RelocIterator iter(this, low_boundary); | |
1722 while (iter.next()) { | |
1723 if (iter.type() == relocInfo::virtual_call_type) { | |
1724 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1725 oop ic_oop = ic->cached_oop(); | |
1726 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1727 "Found unmarked ic_oop in reachable nmethod"); | |
1728 } | |
1729 } | |
1730 } | |
1731 #endif // !PRODUCT | |
1732 } | |
1733 | |
941 | 1734 // This method is called twice during GC -- once while |
1735 // tracing the "active" nmethods on thread stacks during | |
1736 // the (strong) marking phase, and then again when walking | |
1737 // the code cache contents during the weak roots processing | |
1738 // 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
|
1739 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1740 // case. We want to walk the weak roots in the nmethod |
1741 // only in the second case. The weak roots in the nmethod | |
1742 // are the oops in the ExceptionCache and the InlineCache | |
1743 // oops. | |
994
753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
jrose
parents:
993
diff
changeset
|
1744 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1745 // make sure the oops ready to receive visitors |
1746 assert(!is_zombie() && !is_unloaded(), | |
1747 "should not call follow on zombie or unloaded nmethod"); | |
1748 | |
1749 // If the method is not entrant or zombie then a JMP is plastered over the | |
1750 // first few bytes. If an oop in the old code was there, that oop | |
1751 // should not get GC'd. Skip the first few bytes of oops on | |
1752 // not-entrant methods. | |
1753 address low_boundary = verified_entry_point(); | |
1754 if (is_not_entrant()) { | |
1755 low_boundary += NativeJump::instruction_size; | |
1756 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1757 // (See comment above.) | |
1758 } | |
1759 | |
1760 // Compiled code | |
1761 f->do_oop((oop*) &_method); | |
994
753cf9794df9
6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
jrose
parents:
993
diff
changeset
|
1762 if (!do_strong_roots_only) { |
941 | 1763 // weak roots processing phase -- update ExceptionCache oops |
1764 ExceptionCache* ec = exception_cache(); | |
1765 while(ec != NULL) { | |
1766 f->do_oop((oop*)ec->exception_type_addr()); | |
1767 ec = ec->next(); | |
1768 } | |
1769 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1770 |
1771 RelocIterator iter(this, low_boundary); | |
941 | 1772 |
0 | 1773 while (iter.next()) { |
1774 if (iter.type() == relocInfo::oop_type ) { | |
1775 oop_Relocation* r = iter.oop_reloc(); | |
1776 // In this loop, we must only follow those oops directly embedded in | |
1777 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1778 assert(1 == (r->oop_is_immediate()) + |
1779 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1780 "oop must be found in exactly one place"); | |
0 | 1781 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1782 f->do_oop(r->oop_addr()); | |
1783 } | |
1784 } | |
1785 } | |
1786 | |
1787 // Scopes | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1788 // This includes oop constants not inlined in the code stream. |
0 | 1789 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1790 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1791 f->do_oop(p); | |
1792 } | |
1793 } | |
1794 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1795 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1796 |
148e5441d916
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1797 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1798 |
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1799 // An nmethod is "marked" if its _mark_link is set non-null. |
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1800 // Even if it is the end of the linked list, it will have a non-null link value, |
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1801 // as long as it is on the list. |
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1802 // This code must be MP safe, because it is used from parallel GC passes. |
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1803 bool nmethod::test_set_oops_do_mark() { |
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1804 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1805 nmethod* observed_mark_link = _oops_do_mark_link; |
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1806 if (observed_mark_link == NULL) { |
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1807 // Claim this nmethod for this thread to mark. |
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1808 observed_mark_link = (nmethod*) |
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1809 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1810 if (observed_mark_link == NULL) { |
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1811 |
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1812 // Atomically append this nmethod (now claimed) to the head of the list: |
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1813 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1814 for (;;) { |
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1815 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1816 _oops_do_mark_link = required_mark_nmethods; |
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1817 observed_mark_nmethods = (nmethod*) |
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1818 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1819 if (observed_mark_nmethods == required_mark_nmethods) |
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1820 break; |
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1821 } |
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1822 // Mark was clear when we first saw this guy. |
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1823 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1824 return false; |
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1825 } |
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1826 } |
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1827 // On fall through, another racing thread marked this nmethod before we did. |
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1828 return true; |
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1829 } |
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1830 |
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1831 void nmethod::oops_do_marking_prologue() { |
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1832 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1833 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1834 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1835 // may fork a bunch of threads, and we need them all to see the same state. |
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1836 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1837 guarantee(observed == NULL, "no races in this sequential code"); |
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1838 } |
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1839 |
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1840 void nmethod::oops_do_marking_epilogue() { |
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1841 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1842 nmethod* cur = _oops_do_mark_nmethods; |
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1843 while (cur != NMETHOD_SENTINEL) { |
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1844 assert(cur != NULL, "not NULL-terminated"); |
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1845 nmethod* next = cur->_oops_do_mark_link; |
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1846 cur->_oops_do_mark_link = NULL; |
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1847 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1848 cur = next; |
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1849 } |
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1850 void* required = _oops_do_mark_nmethods; |
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1851 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1852 guarantee(observed == required, "no races in this sequential code"); |
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1853 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1854 } |
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1855 |
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1856 class DetectScavengeRoot: public OopClosure { |
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1857 bool _detected_scavenge_root; |
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1858 public: |
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1859 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1860 { NOT_PRODUCT(_print_nm = NULL); } |
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1861 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1862 virtual void do_oop(oop* p) { |
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1863 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1864 NOT_PRODUCT(maybe_print(p)); |
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1865 _detected_scavenge_root = true; |
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1866 } |
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1867 } |
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1868 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1869 |
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1870 #ifndef PRODUCT |
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1871 nmethod* _print_nm; |
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1872 void maybe_print(oop* p) { |
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1873 if (_print_nm == NULL) return; |
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1874 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1875 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1876 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1877 (intptr_t)(*p), (intptr_t)p); |
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1878 (*p)->print(); |
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1879 } |
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1880 #endif //PRODUCT |
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1881 }; |
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1882 |
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1883 bool nmethod::detect_scavenge_root_oops() { |
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1884 DetectScavengeRoot detect_scavenge_root; |
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1885 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1886 oops_do(&detect_scavenge_root); |
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1887 return detect_scavenge_root.detected_scavenge_root(); |
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1888 } |
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1889 |
0 | 1890 // Method that knows how to preserve outgoing arguments at call. This method must be |
1891 // called with a frame corresponding to a Java invoke | |
1892 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1893 #ifndef SHARK |
0 | 1894 if (!method()->is_native()) { |
1895 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1896 Bytecode_invoke call(ssd.method(), ssd.bci()); |
1897 bool has_receiver = call.has_receiver(); | |
2177
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1898 Symbol* signature = call.signature(); |
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1899 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1900 } |
1692 | 1901 #endif // !SHARK |
0 | 1902 } |
1903 | |
1904 | |
1905 oop nmethod::embeddedOop_at(u_char* p) { | |
1906 RelocIterator iter(this, p, p + oopSize); | |
1907 while (iter.next()) | |
1908 if (iter.type() == relocInfo::oop_type) { | |
1909 return iter.oop_reloc()->oop_value(); | |
1910 } | |
1911 return NULL; | |
1912 } | |
1913 | |
1914 | |
1915 inline bool includes(void* p, void* from, void* to) { | |
1916 return from <= p && p < to; | |
1917 } | |
1918 | |
1919 | |
1920 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1921 assert(count >= 2, "must be sentinel values, at least"); | |
1922 | |
1923 #ifdef ASSERT | |
1924 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1925 int prev_offset = pcs[0].pc_offset(); | |
1926 assert(prev_offset == PcDesc::lower_offset_limit, | |
1927 "must start with a sentinel"); | |
1928 for (int i = 1; i < count; i++) { | |
1929 int this_offset = pcs[i].pc_offset(); | |
1930 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1931 prev_offset = this_offset; | |
1932 } | |
1933 assert(prev_offset == PcDesc::upper_offset_limit, | |
1934 "must end with a sentinel"); | |
1935 #endif //ASSERT | |
1936 | |
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1937 // Search for MethodHandle invokes and tag the nmethod. |
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1938 for (int i = 0; i < count; i++) { |
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1939 if (pcs[i].is_method_handle_invoke()) { |
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1940 set_has_method_handle_invokes(true); |
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1941 break; |
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1942 } |
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1943 } |
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1944 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1945 |
0 | 1946 int size = count * sizeof(PcDesc); |
1947 assert(scopes_pcs_size() >= size, "oob"); | |
1948 memcpy(scopes_pcs_begin(), pcs, size); | |
1949 | |
1950 // Adjust the final sentinel downward. | |
1951 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1952 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1953 last_pc->set_pc_offset(content_size() + 1); |
0 | 1954 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1955 // Fill any rounding gaps with copies of the last record. | |
1956 last_pc[1] = last_pc[0]; | |
1957 } | |
1958 // The following assert could fail if sizeof(PcDesc) is not | |
1959 // an integral multiple of oopSize (the rounding term). | |
1960 // If it fails, change the logic to always allocate a multiple | |
1961 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1962 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1963 } | |
1964 | |
1965 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1966 assert(scopes_data_size() >= size, "oob"); | |
1967 memcpy(scopes_data_begin(), buffer, size); | |
1968 } | |
1969 | |
1970 | |
1971 #ifdef ASSERT | |
1972 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1973 PcDesc* lower = nm->scopes_pcs_begin(); | |
1974 PcDesc* upper = nm->scopes_pcs_end(); | |
1975 lower += 1; // exclude initial sentinel | |
1976 PcDesc* res = NULL; | |
1977 for (PcDesc* p = lower; p < upper; p++) { | |
1978 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1979 if (match_desc(p, pc_offset, approximate)) { | |
1980 if (res == NULL) | |
1981 res = p; | |
1982 else | |
1983 res = (PcDesc*) badAddress; | |
1984 } | |
1985 } | |
1986 return res; | |
1987 } | |
1988 #endif | |
1989 | |
1990 | |
1991 // Finds a PcDesc with real-pc equal to "pc" | |
1992 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1993 address base_address = code_begin(); |
0 | 1994 if ((pc < base_address) || |
1995 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1996 return NULL; // PC is wildly out of range | |
1997 } | |
1998 int pc_offset = (int) (pc - base_address); | |
1999 | |
2000 // Check the PcDesc cache if it contains the desired PcDesc | |
2001 // (This as an almost 100% hit rate.) | |
2002 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2003 if (res != NULL) { | |
2004 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2005 return res; | |
2006 } | |
2007 | |
2008 // Fallback algorithm: quasi-linear search for the PcDesc | |
2009 // Find the last pc_offset less than the given offset. | |
2010 // The successor must be the required match, if there is a match at all. | |
2011 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2012 PcDesc* lower = scopes_pcs_begin(); | |
2013 PcDesc* upper = scopes_pcs_end(); | |
2014 upper -= 1; // exclude final sentinel | |
2015 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2016 | |
2017 #define assert_LU_OK \ | |
2018 /* invariant on lower..upper during the following search: */ \ | |
2019 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2020 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2021 assert_LU_OK; | |
2022 | |
2023 // Use the last successful return as a split point. | |
2024 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2025 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2026 if (mid->pc_offset() < pc_offset) { | |
2027 lower = mid; | |
2028 } else { | |
2029 upper = mid; | |
2030 } | |
2031 | |
2032 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2033 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2034 const int RADIX = (1 << LOG2_RADIX); | |
2035 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2036 while ((mid = lower + step) < upper) { | |
2037 assert_LU_OK; | |
2038 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2039 if (mid->pc_offset() < pc_offset) { | |
2040 lower = mid; | |
2041 } else { | |
2042 upper = mid; | |
2043 break; | |
2044 } | |
2045 } | |
2046 assert_LU_OK; | |
2047 } | |
2048 | |
2049 // Sneak up on the value with a linear search of length ~16. | |
2050 while (true) { | |
2051 assert_LU_OK; | |
2052 mid = lower + 1; | |
2053 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2054 if (mid->pc_offset() < pc_offset) { | |
2055 lower = mid; | |
2056 } else { | |
2057 upper = mid; | |
2058 break; | |
2059 } | |
2060 } | |
2061 #undef assert_LU_OK | |
2062 | |
2063 if (match_desc(upper, pc_offset, approximate)) { | |
2064 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2065 _pc_desc_cache.add_pc_desc(upper); | |
2066 return upper; | |
2067 } else { | |
2068 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2069 return NULL; | |
2070 } | |
2071 } | |
2072 | |
2073 | |
2074 bool nmethod::check_all_dependencies() { | |
2075 bool found_check = false; | |
2076 // wholesale check of all dependencies | |
2077 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2078 if (deps.check_dependency() != NULL) { | |
2079 found_check = true; | |
2080 NOT_DEBUG(break); | |
2081 } | |
2082 } | |
2083 return found_check; // tell caller if we found anything | |
2084 } | |
2085 | |
2086 bool nmethod::check_dependency_on(DepChange& changes) { | |
2087 // What has happened: | |
2088 // 1) a new class dependee has been added | |
2089 // 2) dependee and all its super classes have been marked | |
2090 bool found_check = false; // set true if we are upset | |
2091 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2092 // Evaluate only relevant dependencies. | |
2093 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2094 found_check = true; | |
2095 NOT_DEBUG(break); | |
2096 } | |
2097 } | |
2098 return found_check; | |
2099 } | |
2100 | |
2101 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2102 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2103 objArrayOop dependee_methods = dependee_ik->methods(); | |
2104 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2105 if (deps.type() == Dependencies::evol_method) { | |
2106 methodOop method = deps.method_argument(0); | |
2107 for (int j = 0; j < dependee_methods->length(); j++) { | |
2108 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2109 // RC_TRACE macro has an embedded ResourceMark | |
2110 RC_TRACE(0x01000000, | |
2111 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2112 _method->method_holder()->klass_part()->external_name(), | |
2113 _method->name()->as_C_string(), | |
2114 _method->signature()->as_C_string(), compile_id(), | |
2115 method->method_holder()->klass_part()->external_name(), | |
2116 method->name()->as_C_string(), | |
2117 method->signature()->as_C_string())); | |
2118 if (TraceDependencies || LogCompilation) | |
2119 deps.log_dependency(dependee); | |
2120 return true; | |
2121 } | |
2122 } | |
2123 } | |
2124 } | |
2125 return false; | |
2126 } | |
2127 | |
2128 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2129 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2130 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2131 if (deps.type() != Dependencies::evol_method) | |
2132 continue; | |
2133 methodOop method = deps.method_argument(0); | |
2134 if (method == dependee) return true; | |
2135 } | |
2136 return false; | |
2137 } | |
2138 | |
2139 | |
2140 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2141 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2142 if (is_zombie()) { |
2143 // a zombie may never be patched | |
2144 return false; | |
2145 } | |
2146 return true; | |
2147 } | |
2148 | |
2149 | |
2150 address nmethod::continuation_for_implicit_exception(address pc) { | |
2151 // Exception happened outside inline-cache check code => we are inside | |
2152 // an active nmethod => use cpc to determine a return address | |
1748 | 2153 int exception_offset = pc - code_begin(); |
0 | 2154 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2155 #ifdef ASSERT | |
2156 if (cont_offset == 0) { | |
2157 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2158 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2159 HandleMark hm(thread); | |
2160 ResourceMark rm(thread); | |
2161 CodeBlob* cb = CodeCache::find_blob(pc); | |
2162 assert(cb != NULL && cb == this, ""); | |
2163 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2164 print(); | |
2165 method()->print_codes(); | |
2166 print_code(); | |
2167 print_pcs(); | |
2168 } | |
2169 #endif | |
1250 | 2170 if (cont_offset == 0) { |
2171 // Let the normal error handling report the exception | |
2172 return NULL; | |
2173 } | |
1748 | 2174 return code_begin() + cont_offset; |
0 | 2175 } |
2176 | |
2177 | |
2178 | |
2179 void nmethod_init() { | |
2180 // make sure you didn't forget to adjust the filler fields | |
2181 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2182 } | |
2183 | |
2184 | |
2185 //------------------------------------------------------------------------------------------- | |
2186 | |
2187 | |
2188 // QQQ might we make this work from a frame?? | |
2189 nmethodLocker::nmethodLocker(address pc) { | |
2190 CodeBlob* cb = CodeCache::find_blob(pc); | |
2191 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2192 _nm = (nmethod*)cb; | |
2193 lock_nmethod(_nm); | |
2194 } | |
2195 | |
2196 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
2197 if (nm == NULL) return; | |
2198 Atomic::inc(&nm->_lock_count); | |
2199 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
2200 } | |
2201 | |
2202 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2203 if (nm == NULL) return; | |
2204 Atomic::dec(&nm->_lock_count); | |
2205 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2206 } | |
2207 | |
1204 | 2208 |
2209 // ----------------------------------------------------------------------------- | |
2210 // nmethod::get_deopt_original_pc | |
2211 // | |
2212 // Return the original PC for the given PC if: | |
2213 // (a) the given PC belongs to a nmethod and | |
2214 // (b) it is a deopt PC | |
2215 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2216 if (fr->cb() == NULL) return NULL; | |
2217 | |
2218 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2219 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2220 return nm->get_original_pc(fr); | |
2221 | |
2222 return NULL; | |
0 | 2223 } |
2224 | |
2225 | |
2226 // ----------------------------------------------------------------------------- | |
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2227 // MethodHandle |
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2228 |
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2229 bool nmethod::is_method_handle_return(address return_pc) { |
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2230 if (!has_method_handle_invokes()) return false; |
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2231 PcDesc* pd = pc_desc_at(return_pc); |
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2232 if (pd == NULL) |
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2233 return false; |
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2234 return pd->is_method_handle_invoke(); |
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2235 } |
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2236 |
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2237 |
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2238 // ----------------------------------------------------------------------------- |
0 | 2239 // Verification |
2240 | |
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2241 class VerifyOopsClosure: public OopClosure { |
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2242 nmethod* _nm; |
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2243 bool _ok; |
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2244 public: |
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2245 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2246 bool ok() { return _ok; } |
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2247 virtual void do_oop(oop* p) { |
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2248 if ((*p) == NULL || (*p)->is_oop()) return; |
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2249 if (_ok) { |
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2250 _nm->print_nmethod(true); |
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2251 _ok = false; |
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2252 } |
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2253 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2254 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2255 } |
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2256 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2257 }; |
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2258 |
0 | 2259 void nmethod::verify() { |
2260 | |
2261 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2262 // seems odd. | |
2263 | |
2264 if( is_zombie() || is_not_entrant() ) | |
2265 return; | |
2266 | |
2267 // Make sure all the entry points are correctly aligned for patching. | |
2268 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2269 | |
2270 assert(method()->is_oop(), "must be valid"); | |
2271 | |
2272 ResourceMark rm; | |
2273 | |
2274 if (!CodeCache::contains(this)) { | |
1490
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2275 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2276 } |
2277 | |
2278 if(is_native_method() ) | |
2279 return; | |
2280 | |
2281 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2282 if (nm != this) { | |
1490
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2283 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2284 this)); |
0 | 2285 } |
2286 | |
2287 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2288 if (! p->verify(this)) { | |
2289 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2290 } | |
2291 } | |
2292 | |
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2293 VerifyOopsClosure voc(this); |
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2294 oops_do(&voc); |
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2295 assert(voc.ok(), "embedded oops must be OK"); |
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2296 verify_scavenge_root_oops(); |
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2297 |
0 | 2298 verify_scopes(); |
2299 } | |
2300 | |
2301 | |
2302 void nmethod::verify_interrupt_point(address call_site) { | |
2303 // This code does not work in release mode since | |
2304 // owns_lock only is available in debug mode. | |
2305 CompiledIC* ic = NULL; | |
2306 Thread *cur = Thread::current(); | |
2307 if (CompiledIC_lock->owner() == cur || | |
2308 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2309 SafepointSynchronize::is_at_safepoint())) { | |
2310 ic = CompiledIC_at(call_site); | |
2311 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2312 } else { | |
2313 MutexLocker ml_verify (CompiledIC_lock); | |
2314 ic = CompiledIC_at(call_site); | |
2315 } | |
2316 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2317 assert(pd != NULL, "PcDesc must exist"); | |
2318 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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2319 pd->obj_decode_offset(), pd->should_reexecute(), |
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2320 pd->return_oop()); |
0 | 2321 !sd->is_top(); sd = sd->sender()) { |
2322 sd->verify(); | |
2323 } | |
2324 } | |
2325 | |
2326 void nmethod::verify_scopes() { | |
2327 if( !method() ) return; // Runtime stubs have no scope | |
2328 if (method()->is_native()) return; // Ignore stub methods. | |
2329 // iterate through all interrupt point | |
2330 // and verify the debug information is valid. | |
2331 RelocIterator iter((nmethod*)this); | |
2332 while (iter.next()) { | |
2333 address stub = NULL; | |
2334 switch (iter.type()) { | |
2335 case relocInfo::virtual_call_type: | |
2336 verify_interrupt_point(iter.addr()); | |
2337 break; | |
2338 case relocInfo::opt_virtual_call_type: | |
2339 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2340 verify_interrupt_point(iter.addr()); | |
2341 break; | |
2342 case relocInfo::static_call_type: | |
2343 stub = iter.static_call_reloc()->static_stub(); | |
2344 //verify_interrupt_point(iter.addr()); | |
2345 break; | |
2346 case relocInfo::runtime_call_type: | |
2347 address destination = iter.reloc()->value(); | |
2348 // Right now there is no way to find out which entries support | |
2349 // an interrupt point. It would be nice if we had this | |
2350 // information in a table. | |
2351 break; | |
2352 } | |
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2353 assert(UseC1X || stub == NULL || stub_contains(stub), "static call stub outside stub section"); |
0 | 2354 } |
2355 } | |
2356 | |
2357 | |
2358 // ----------------------------------------------------------------------------- | |
2359 // Non-product code | |
2360 #ifndef PRODUCT | |
2361 | |
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2362 class DebugScavengeRoot: public OopClosure { |
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2363 nmethod* _nm; |
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2364 bool _ok; |
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2365 public: |
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|
2366 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2367 bool ok() { return _ok; } |
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2368 virtual void do_oop(oop* p) { |
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2369 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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|
2370 if (_ok) { |
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|
2371 _nm->print_nmethod(true); |
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2372 _ok = false; |
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|
2373 } |
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|
2374 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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|
2375 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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|
2376 (*p)->print(); |
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|
2377 } |
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|
2378 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2379 }; |
0 | 2380 |
989
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|
2381 void nmethod::verify_scavenge_root_oops() { |
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|
2382 if (!on_scavenge_root_list()) { |
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|
2383 // Actually look inside, to verify the claim that it's clean. |
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|
2384 DebugScavengeRoot debug_scavenge_root(this); |
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|
2385 oops_do(&debug_scavenge_root); |
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|
2386 if (!debug_scavenge_root.ok()) |
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|
2387 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2388 } |
989
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|
2389 assert(scavenge_root_not_marked(), ""); |
0 | 2390 } |
2391 | |
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2392 #endif // PRODUCT |
0 | 2393 |
2394 // Printing operations | |
2395 | |
2396 void nmethod::print() const { | |
2397 ResourceMark rm; | |
2398 ttyLocker ttyl; // keep the following output all in one block | |
2399 | |
2400 tty->print("Compiled "); | |
2401 | |
2402 if (is_compiled_by_c1()) { | |
2403 tty->print("(c1) "); | |
2404 } else if (is_compiled_by_c2()) { | |
2405 tty->print("(c2) "); | |
1692 | 2406 } else if (is_compiled_by_shark()) { |
2407 tty->print("(shark) "); | |
0 | 2408 } else { |
2409 tty->print("(nm) "); | |
2410 } | |
2411 | |
2412 print_on(tty, "nmethod"); | |
2413 tty->cr(); | |
2414 if (WizardMode) { | |
2415 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2416 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2417 tty->print(" { "); | |
2418 if (is_in_use()) tty->print("in_use "); | |
2419 if (is_not_entrant()) tty->print("not_entrant "); | |
2420 if (is_zombie()) tty->print("zombie "); | |
2421 if (is_unloaded()) tty->print("unloaded "); | |
989
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2422 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2423 tty->print_cr("}:"); |
2424 } | |
2425 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2426 (address)this, | |
2427 (address)this + size(), | |
2428 size()); | |
2429 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2430 relocation_begin(), | |
2431 relocation_end(), | |
2432 relocation_size()); | |
1762
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2433 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2434 consts_begin(), |
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|
2435 consts_end(), |
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|
2436 consts_size()); |
1748 | 2437 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2438 insts_begin(), | |
2439 insts_end(), | |
2440 insts_size()); | |
0 | 2441 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2442 stub_begin(), | |
2443 stub_end(), | |
2444 stub_size()); | |
1563
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|
2445 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2446 oops_begin(), |
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|
2447 oops_end(), |
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|
2448 oops_size()); |
0 | 2449 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2450 scopes_data_begin(), | |
2451 scopes_data_end(), | |
2452 scopes_data_size()); | |
2453 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2454 scopes_pcs_begin(), | |
2455 scopes_pcs_end(), | |
2456 scopes_pcs_size()); | |
2457 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2458 dependencies_begin(), | |
2459 dependencies_end(), | |
2460 dependencies_size()); | |
2461 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2462 handler_table_begin(), | |
2463 handler_table_end(), | |
2464 handler_table_size()); | |
2465 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2466 nul_chk_table_begin(), | |
2467 nul_chk_table_end(), | |
2468 nul_chk_table_size()); | |
2469 } | |
2470 | |
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|
2471 void nmethod::print_code() { |
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|
2472 HandleMark hm; |
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changeset
|
2473 ResourceMark m; |
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diff
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|
2474 Disassembler::decode(this); |
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diff
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|
2475 } |
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|
2476 |
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|
2477 |
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|
2478 #ifndef PRODUCT |
0 | 2479 |
2480 void nmethod::print_scopes() { | |
2481 // Find the first pc desc for all scopes in the code and print it. | |
2482 ResourceMark rm; | |
2483 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2484 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2485 continue; | |
2486 | |
2487 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2488 sd->print_on(tty, p); | |
2489 } | |
2490 } | |
2491 | |
2492 void nmethod::print_dependencies() { | |
2493 ResourceMark rm; | |
2494 ttyLocker ttyl; // keep the following output all in one block | |
2495 tty->print_cr("Dependencies:"); | |
2496 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2497 deps.print_dependency(); | |
2498 klassOop ctxk = deps.context_type(); | |
2499 if (ctxk != NULL) { | |
2500 Klass* k = Klass::cast(ctxk); | |
2501 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2502 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2503 } |
2504 } | |
2505 deps.log_dependency(); // put it into the xml log also | |
2506 } | |
2507 } | |
2508 | |
2509 | |
2510 void nmethod::print_relocations() { | |
2511 ResourceMark m; // in case methods get printed via the debugger | |
2512 tty->print_cr("relocations:"); | |
2513 RelocIterator iter(this); | |
2514 iter.print(); | |
2515 if (UseRelocIndex) { | |
2516 jint* index_end = (jint*)relocation_end() - 1; | |
2517 jint index_size = *index_end; | |
2518 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2519 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2520 if (index_size > 0) { | |
2521 jint* ip; | |
2522 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2523 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2524 ip[0], | |
2525 ip[1], | |
2526 header_end()+ip[0], | |
2527 relocation_begin()-1+ip[1]); | |
2528 for (; ip < index_end; ip++) | |
2529 tty->print_cr(" (%d ?)", ip[0]); | |
2530 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2531 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2532 } | |
2533 } | |
2534 } | |
2535 | |
2536 | |
2537 void nmethod::print_pcs() { | |
2538 ResourceMark m; // in case methods get printed via debugger | |
2539 tty->print_cr("pc-bytecode offsets:"); | |
2540 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2541 p->print(this); | |
2542 } | |
2543 } | |
2544 | |
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|
2545 #endif // PRODUCT |
0 | 2546 |
2547 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2548 RelocIterator iter(this, begin, end); | |
2549 bool have_one = false; | |
2550 while (iter.next()) { | |
2551 have_one = true; | |
2552 switch (iter.type()) { | |
2553 case relocInfo::none: return "no_reloc"; | |
2554 case relocInfo::oop_type: { | |
2555 stringStream st; | |
2556 oop_Relocation* r = iter.oop_reloc(); | |
2557 oop obj = r->oop_value(); | |
2558 st.print("oop("); | |
2559 if (obj == NULL) st.print("NULL"); | |
2560 else obj->print_value_on(&st); | |
2561 st.print(")"); | |
2562 return st.as_string(); | |
2563 } | |
2564 case relocInfo::virtual_call_type: return "virtual_call"; | |
2565 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2566 case relocInfo::static_call_type: return "static_call"; | |
2567 case relocInfo::static_stub_type: return "static_stub"; | |
2568 case relocInfo::runtime_call_type: return "runtime_call"; | |
2569 case relocInfo::external_word_type: return "external_word"; | |
2570 case relocInfo::internal_word_type: return "internal_word"; | |
2571 case relocInfo::section_word_type: return "section_word"; | |
2572 case relocInfo::poll_type: return "poll"; | |
2573 case relocInfo::poll_return_type: return "poll_return"; | |
2574 case relocInfo::type_mask: return "type_bit_mask"; | |
2575 } | |
2576 } | |
2577 return have_one ? "other" : NULL; | |
2578 } | |
2579 | |
2580 // Return a the last scope in (begin..end] | |
2581 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2582 PcDesc* p = pc_desc_near(begin+1); | |
2583 if (p != NULL && p->real_pc(this) <= end) { | |
2584 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
changeset
|
2585 p->obj_decode_offset(), p->should_reexecute(), |
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2586 p->return_oop()); |
0 | 2587 } |
2588 return NULL; | |
2589 } | |
2590 | |
1155
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|
2591 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2592 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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diff
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|
2593 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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|
2594 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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diff
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|
2595 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2596 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
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|
2597 |
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6975855: don't emit deopt MH handler in C1 if not required
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diff
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|
2598 if (has_method_handle_invokes()) |
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6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2599 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
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6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2600 |
1155
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|
2601 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
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|
2602 |
1155
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|
2603 if (block_begin == entry_point()) { |
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|
2604 methodHandle m = method(); |
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|
2605 if (m.not_null()) { |
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diff
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|
2606 stream->print(" # "); |
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|
2607 m->print_value_on(stream); |
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|
2608 stream->cr(); |
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|
2609 } |
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|
2610 if (m.not_null() && !is_osr_method()) { |
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|
2611 ResourceMark rm; |
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|
2612 int sizeargs = m->size_of_parameters(); |
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|
2613 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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|
2614 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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|
2615 { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2616 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
2617 if (!m->is_static()) |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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|
2618 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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changeset
|
2619 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
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diff
changeset
|
2620 BasicType t = ss.type(); |
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|
2621 sig_bt[sig_index++] = t; |
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|
2622 if (type2size[t] == 2) { |
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|
2623 sig_bt[sig_index++] = T_VOID; |
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|
2624 } else { |
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|
2625 assert(type2size[t] == 1, "size is 1 or 2"); |
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2626 } |
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|
2627 } |
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2628 assert(sig_index == sizeargs, ""); |
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|
2629 } |
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|
2630 const char* spname = "sp"; // make arch-specific? |
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2631 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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2632 int stack_slot_offset = this->frame_size() * wordSize; |
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2633 int tab1 = 14, tab2 = 24; |
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|
2634 int sig_index = 0; |
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2635 int arg_index = (m->is_static() ? 0 : -1); |
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2636 bool did_old_sp = false; |
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2637 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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2638 bool at_this = (arg_index == -1); |
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2639 bool at_old_sp = false; |
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2640 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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2641 assert(t == sig_bt[sig_index], "sigs in sync"); |
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|
2642 if (at_this) |
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2643 stream->print(" # this: "); |
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|
2644 else |
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|
2645 stream->print(" # parm%d: ", arg_index); |
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2646 stream->move_to(tab1); |
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2647 VMReg fst = regs[sig_index].first(); |
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2648 VMReg snd = regs[sig_index].second(); |
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2649 if (fst->is_reg()) { |
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2650 stream->print("%s", fst->name()); |
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2651 if (snd->is_valid()) { |
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2652 stream->print(":%s", snd->name()); |
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|
2653 } |
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2654 } else if (fst->is_stack()) { |
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2655 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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2656 if (offset == stack_slot_offset) at_old_sp = true; |
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2657 stream->print("[%s+0x%x]", spname, offset); |
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|
2658 } else { |
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|
2659 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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|
2660 } |
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|
2661 stream->print(" "); |
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|
2662 stream->move_to(tab2); |
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|
2663 stream->print("= "); |
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diff
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|
2664 if (at_this) { |
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|
2665 m->method_holder()->print_value_on(stream); |
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|
2666 } else { |
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|
2667 bool did_name = false; |
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|
2668 if (!at_this && ss.is_object()) { |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2142
diff
changeset
|
2669 Symbol* name = ss.as_symbol_or_null(); |
1155
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diff
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|
2670 if (name != NULL) { |
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diff
changeset
|
2671 name->print_value_on(stream); |
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diff
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|
2672 did_name = true; |
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diff
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|
2673 } |
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diff
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|
2674 } |
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diff
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|
2675 if (!did_name) |
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diff
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|
2676 stream->print("%s", type2name(t)); |
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diff
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|
2677 } |
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diff
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|
2678 if (at_old_sp) { |
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diff
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|
2679 stream->print(" (%s of caller)", spname); |
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diff
changeset
|
2680 did_old_sp = true; |
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diff
changeset
|
2681 } |
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diff
changeset
|
2682 stream->cr(); |
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diff
changeset
|
2683 sig_index += type2size[t]; |
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diff
changeset
|
2684 arg_index += 1; |
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diff
changeset
|
2685 if (!at_this) ss.next(); |
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diff
changeset
|
2686 } |
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diff
changeset
|
2687 if (!did_old_sp) { |
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diff
changeset
|
2688 stream->print(" # "); |
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diff
changeset
|
2689 stream->move_to(tab1); |
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diff
changeset
|
2690 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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diff
changeset
|
2691 stream->print(" (%s of caller)", spname); |
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diff
changeset
|
2692 stream->cr(); |
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diff
changeset
|
2693 } |
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diff
changeset
|
2694 } |
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diff
changeset
|
2695 } |
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diff
changeset
|
2696 } |
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diff
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|
2697 |
0 | 2698 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2699 // First, find an oopmap in (begin, end]. | |
2700 // We use the odd half-closed interval so that oop maps and scope descs | |
2701 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2702 address base = code_begin(); |
0 | 2703 OopMapSet* oms = oop_maps(); |
2704 if (oms != NULL) { | |
2705 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2706 OopMap* om = oms->at(i); | |
2707 address pc = base + om->offset(); | |
2708 if (pc > begin) { | |
2709 if (pc <= end) { | |
100
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30
diff
changeset
|
2710 st->move_to(column); |
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30
diff
changeset
|
2711 st->print("; "); |
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30
diff
changeset
|
2712 om->print_on(st); |
0 | 2713 } |
2714 break; | |
2715 } | |
2716 } | |
2717 } | |
100
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diff
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|
2718 |
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diff
changeset
|
2719 // Print any debug info present at this pc. |
0 | 2720 ScopeDesc* sd = scope_desc_in(begin, end); |
2721 if (sd != NULL) { | |
100
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diff
changeset
|
2722 st->move_to(column); |
0 | 2723 if (sd->bci() == SynchronizationEntryBCI) { |
2724 st->print(";*synchronization entry"); | |
2725 } else { | |
2726 if (sd->method().is_null()) { | |
100
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diff
changeset
|
2727 st->print("method is NULL"); |
0 | 2728 } else if (sd->method()->is_native()) { |
100
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diff
changeset
|
2729 st->print("method is native"); |
0 | 2730 } else { |
2142 | 2731 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2732 st->print(";*%s", Bytecodes::name(bc)); |
2733 switch (bc) { | |
2734 case Bytecodes::_invokevirtual: | |
2735 case Bytecodes::_invokespecial: | |
2736 case Bytecodes::_invokestatic: | |
2737 case Bytecodes::_invokeinterface: | |
2738 { | |
2142 | 2739 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2740 st->print(" "); |
2142 | 2741 if (invoke.name() != NULL) |
2742 invoke.name()->print_symbol_on(st); | |
0 | 2743 else |
2744 st->print("<UNKNOWN>"); | |
2745 break; | |
2746 } | |
2747 case Bytecodes::_getfield: | |
2748 case Bytecodes::_putfield: | |
2749 case Bytecodes::_getstatic: | |
2750 case Bytecodes::_putstatic: | |
2751 { | |
2142 | 2752 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2753 st->print(" "); |
2142 | 2754 if (field.name() != NULL) |
2755 field.name()->print_symbol_on(st); | |
0 | 2756 else |
2757 st->print("<UNKNOWN>"); | |
2758 } | |
2759 } | |
2760 } | |
2761 } | |
100
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diff
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|
2762 |
0 | 2763 // Print all scopes |
2764 for (;sd != NULL; sd = sd->sender()) { | |
100
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diff
changeset
|
2765 st->move_to(column); |
0 | 2766 st->print("; -"); |
2767 if (sd->method().is_null()) { | |
100
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diff
changeset
|
2768 st->print("method is NULL"); |
0 | 2769 } else { |
2770 sd->method()->print_short_name(st); | |
2771 } | |
2772 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2773 if (lineno != -1) { | |
2774 st->print("@%d (line %d)", sd->bci(), lineno); | |
2775 } else { | |
2776 st->print("@%d", sd->bci()); | |
2777 } | |
2778 st->cr(); | |
2779 } | |
2780 } | |
2781 | |
2782 // Print relocation information | |
2783 const char* str = reloc_string_for(begin, end); | |
2784 if (str != NULL) { | |
2785 if (sd != NULL) st->cr(); | |
100
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diff
changeset
|
2786 st->move_to(column); |
0 | 2787 st->print("; {%s}", str); |
2788 } | |
1748 | 2789 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2790 if (cont_offset != 0) { |
100
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diff
changeset
|
2791 st->move_to(column); |
1748 | 2792 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2793 } |
2794 | |
2795 } | |
2796 | |
100
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diff
changeset
|
2797 #ifndef PRODUCT |
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diff
changeset
|
2798 |
0 | 2799 void nmethod::print_value_on(outputStream* st) const { |
2800 print_on(st, "nmethod"); | |
2801 } | |
2802 | |
2803 void nmethod::print_calls(outputStream* st) { | |
2804 RelocIterator iter(this); | |
2805 while (iter.next()) { | |
2806 switch (iter.type()) { | |
2807 case relocInfo::virtual_call_type: | |
2808 case relocInfo::opt_virtual_call_type: { | |
2809 VerifyMutexLocker mc(CompiledIC_lock); | |
2810 CompiledIC_at(iter.reloc())->print(); | |
2811 break; | |
2812 } | |
2813 case relocInfo::static_call_type: | |
2814 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2815 compiledStaticCall_at(iter.reloc())->print(); | |
2816 break; | |
2817 } | |
2818 } | |
2819 } | |
2820 | |
2821 void nmethod::print_handler_table() { | |
2822 ExceptionHandlerTable(this).print(); | |
2823 } | |
2824 | |
2825 void nmethod::print_nul_chk_table() { | |
1748 | 2826 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2827 } |
2828 | |
2829 void nmethod::print_statistics() { | |
2830 ttyLocker ttyl; | |
2831 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2832 nmethod_stats.print_native_nmethod_stats(); | |
2833 nmethod_stats.print_nmethod_stats(); | |
2834 DebugInformationRecorder::print_statistics(); | |
2835 nmethod_stats.print_pc_stats(); | |
2836 Dependencies::print_statistics(); | |
2837 if (xtty != NULL) xtty->tail("statistics"); | |
2838 } | |
2839 | |
2840 #endif // PRODUCT |