Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 2353:1c0cf339481b
7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache
Summary: Use largest_free_block() instead of unallocated_capacity().
Reviewed-by: iveresov, never, ysr
author | kvn |
---|---|
date | Wed, 09 Mar 2011 09:15:16 -0800 |
parents | 4cd9add59b1e |
children | fc5ebbb2d1a8 |
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 | |
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193 |
0 | 194 //--------------------------------------------------------------------------------- |
195 | |
196 | |
197 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
198 assert(pc != NULL, "Must be non null"); | |
199 assert(exception.not_null(), "Must be non null"); | |
200 assert(handler != NULL, "Must be non null"); | |
201 | |
202 _count = 0; | |
203 _exception_type = exception->klass(); | |
204 _next = NULL; | |
205 | |
206 add_address_and_handler(pc,handler); | |
207 } | |
208 | |
209 | |
210 address ExceptionCache::match(Handle exception, address pc) { | |
211 assert(pc != NULL,"Must be non null"); | |
212 assert(exception.not_null(),"Must be non null"); | |
213 if (exception->klass() == exception_type()) { | |
214 return (test_address(pc)); | |
215 } | |
216 | |
217 return NULL; | |
218 } | |
219 | |
220 | |
221 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
222 assert(exception.not_null(),"Must be non null"); | |
223 if (exception->klass() == exception_type() && count() < cache_size) { | |
224 return true; | |
225 } | |
226 return false; | |
227 } | |
228 | |
229 | |
230 address ExceptionCache::test_address(address addr) { | |
231 for (int i=0; i<count(); i++) { | |
232 if (pc_at(i) == addr) { | |
233 return handler_at(i); | |
234 } | |
235 } | |
236 return NULL; | |
237 } | |
238 | |
239 | |
240 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
241 if (test_address(addr) == handler) return true; | |
242 if (count() < cache_size) { | |
243 set_pc_at(count(),addr); | |
244 set_handler_at(count(), handler); | |
245 increment_count(); | |
246 return true; | |
247 } | |
248 return false; | |
249 } | |
250 | |
251 | |
252 // private method for handling exception cache | |
253 // These methods are private, and used to manipulate the exception cache | |
254 // directly. | |
255 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
256 ExceptionCache* ec = exception_cache(); | |
257 while (ec != NULL) { | |
258 if (ec->match_exception_with_space(exception)) { | |
259 return ec; | |
260 } | |
261 ec = ec->next(); | |
262 } | |
263 return NULL; | |
264 } | |
265 | |
266 | |
267 //----------------------------------------------------------------------------- | |
268 | |
269 | |
270 // Helper used by both find_pc_desc methods. | |
271 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
272 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
273 if (!approximate) | |
274 return pc->pc_offset() == pc_offset; | |
275 else | |
276 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
277 } | |
278 | |
279 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
280 if (initial_pc_desc == NULL) { | |
281 _last_pc_desc = NULL; // native method | |
282 return; | |
283 } | |
284 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
285 // reset the cache by filling it with benign (non-null) values | |
286 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
287 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
288 for (int i = 0; i < cache_size; i++) | |
289 _pc_descs[i] = initial_pc_desc; | |
290 } | |
291 | |
292 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
293 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
294 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
295 | |
296 // In order to prevent race conditions do not load cache elements | |
297 // repeatedly, but use a local copy: | |
298 PcDesc* res; | |
299 | |
300 // Step one: Check the most recently returned value. | |
301 res = _last_pc_desc; | |
302 if (res == NULL) return NULL; // native method; no PcDescs at all | |
303 if (match_desc(res, pc_offset, approximate)) { | |
304 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
305 return res; | |
306 } | |
307 | |
308 // Step two: Check the LRU cache. | |
309 for (int i = 0; i < cache_size; i++) { | |
310 res = _pc_descs[i]; | |
311 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
312 if (match_desc(res, pc_offset, approximate)) { | |
313 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
314 _last_pc_desc = res; // record this cache hit in case of repeat | |
315 return res; | |
316 } | |
317 } | |
318 | |
319 // Report failure. | |
320 return NULL; | |
321 } | |
322 | |
323 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
324 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
325 // Update the LRU cache by shifting pc_desc forward: | |
326 for (int i = 0; i < cache_size; i++) { | |
327 PcDesc* next = _pc_descs[i]; | |
328 _pc_descs[i] = pc_desc; | |
329 pc_desc = next; | |
330 } | |
331 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
332 } | |
333 | |
334 // adjust pcs_size so that it is a multiple of both oopSize and | |
335 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
336 // of oopSize, then 2*sizeof(PcDesc) is) | |
337 static int adjust_pcs_size(int pcs_size) { | |
338 int nsize = round_to(pcs_size, oopSize); | |
339 if ((nsize % sizeof(PcDesc)) != 0) { | |
340 nsize = pcs_size + sizeof(PcDesc); | |
341 } | |
342 assert((nsize % oopSize) == 0, "correct alignment"); | |
343 return nsize; | |
344 } | |
345 | |
346 //----------------------------------------------------------------------------- | |
347 | |
348 | |
349 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
350 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
351 assert(new_entry != NULL,"Must be non null"); | |
352 assert(new_entry->next() == NULL, "Must be null"); | |
353 | |
354 if (exception_cache() != NULL) { | |
355 new_entry->set_next(exception_cache()); | |
356 } | |
357 set_exception_cache(new_entry); | |
358 } | |
359 | |
360 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
361 ExceptionCache* prev = NULL; | |
362 ExceptionCache* curr = exception_cache(); | |
363 assert(curr != NULL, "nothing to remove"); | |
364 // find the previous and next entry of ec | |
365 while (curr != ec) { | |
366 prev = curr; | |
367 curr = curr->next(); | |
368 assert(curr != NULL, "ExceptionCache not found"); | |
369 } | |
370 // now: curr == ec | |
371 ExceptionCache* next = curr->next(); | |
372 if (prev == NULL) { | |
373 set_exception_cache(next); | |
374 } else { | |
375 prev->set_next(next); | |
376 } | |
377 delete curr; | |
378 } | |
379 | |
380 | |
381 // public method for accessing the exception cache | |
382 // These are the public access methods. | |
383 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
384 // We never grab a lock to read the exception cache, so we may | |
385 // have false negatives. This is okay, as it can only happen during | |
386 // the first few exception lookups for a given nmethod. | |
387 ExceptionCache* ec = exception_cache(); | |
388 while (ec != NULL) { | |
389 address ret_val; | |
390 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
391 return ret_val; | |
392 } | |
393 ec = ec->next(); | |
394 } | |
395 return NULL; | |
396 } | |
397 | |
398 | |
399 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
400 // There are potential race conditions during exception cache updates, so we | |
401 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 402 // we don't lock during reads, it is possible to have several threads attempt |
0 | 403 // to update the cache with the same data. We need to check for already inserted |
404 // copies of the current data before adding it. | |
405 | |
406 MutexLocker ml(ExceptionCache_lock); | |
407 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
408 | |
409 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
410 target_entry = new ExceptionCache(exception,pc,handler); | |
411 add_exception_cache_entry(target_entry); | |
412 } | |
413 } | |
414 | |
415 | |
416 //-------------end of code for ExceptionCache-------------- | |
417 | |
418 | |
419 int nmethod::total_size() const { | |
420 return | |
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421 consts_size() + |
1748 | 422 insts_size() + |
0 | 423 stub_size() + |
424 scopes_data_size() + | |
425 scopes_pcs_size() + | |
426 handler_table_size() + | |
427 nul_chk_table_size(); | |
428 } | |
429 | |
430 const char* nmethod::compile_kind() const { | |
431 if (is_osr_method()) return "osr"; | |
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432 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 433 return NULL; |
434 } | |
435 | |
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436 // Fill in default values for various flag fields |
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437 void nmethod::init_defaults() { |
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438 _state = alive; |
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439 _marked_for_reclamation = 0; |
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440 _has_flushed_dependencies = 0; |
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441 _speculatively_disconnected = 0; |
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442 _has_unsafe_access = 0; |
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443 _has_method_handle_invokes = 0; |
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444 _marked_for_deoptimization = 0; |
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445 _lock_count = 0; |
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446 _stack_traversal_mark = 0; |
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447 _unload_reported = false; // jvmti state |
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448 |
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449 NOT_PRODUCT(_has_debug_info = false); |
1726 | 450 #ifdef ASSERT |
451 _oops_are_stale = false; | |
452 #endif | |
453 | |
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454 _oops_do_mark_link = NULL; |
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455 _jmethod_id = NULL; |
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456 _osr_link = NULL; |
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457 _scavenge_root_link = NULL; |
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458 _scavenge_root_state = 0; |
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459 _saved_nmethod_link = NULL; |
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460 _compiler = NULL; |
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461 |
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462 #ifdef HAVE_DTRACE_H |
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463 _trap_offset = 0; |
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464 #endif // def HAVE_DTRACE_H |
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465 } |
0 | 466 |
467 | |
468 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
469 CodeBuffer *code_buffer, | |
470 int vep_offset, | |
471 int frame_complete, | |
472 int frame_size, | |
473 ByteSize basic_lock_owner_sp_offset, | |
474 ByteSize basic_lock_sp_offset, | |
475 OopMapSet* oop_maps) { | |
476 // create nmethod | |
477 nmethod* nm = NULL; | |
478 { | |
479 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
480 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
481 CodeOffsets offsets; | |
482 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
483 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
484 nm = new (native_nmethod_size) | |
485 nmethod(method(), native_nmethod_size, &offsets, | |
486 code_buffer, frame_size, | |
487 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
488 oop_maps); | |
489 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
490 if (PrintAssembly && nm != NULL) | |
491 Disassembler::decode(nm); | |
492 } | |
493 // verify nmethod | |
494 debug_only(if (nm) nm->verify();) // might block | |
495 | |
496 if (nm != NULL) { | |
497 nm->log_new_nmethod(); | |
498 } | |
499 | |
500 return nm; | |
501 } | |
502 | |
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503 #ifdef HAVE_DTRACE_H |
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504 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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505 CodeBuffer *code_buffer, |
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506 int vep_offset, |
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507 int trap_offset, |
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508 int frame_complete, |
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509 int frame_size) { |
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510 // create nmethod |
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511 nmethod* nm = NULL; |
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512 { |
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513 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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514 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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515 CodeOffsets offsets; |
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516 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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517 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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518 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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519 |
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520 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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521 |
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522 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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523 if (PrintAssembly && nm != NULL) |
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524 Disassembler::decode(nm); |
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525 } |
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526 // verify nmethod |
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527 debug_only(if (nm) nm->verify();) // might block |
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528 |
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529 if (nm != NULL) { |
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530 nm->log_new_nmethod(); |
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531 } |
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532 |
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533 return nm; |
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534 } |
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535 |
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536 #endif // def HAVE_DTRACE_H |
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537 |
0 | 538 nmethod* nmethod::new_nmethod(methodHandle method, |
539 int compile_id, | |
540 int entry_bci, | |
541 CodeOffsets* offsets, | |
542 int orig_pc_offset, | |
543 DebugInformationRecorder* debug_info, | |
544 Dependencies* dependencies, | |
545 CodeBuffer* code_buffer, int frame_size, | |
546 OopMapSet* oop_maps, | |
547 ExceptionHandlerTable* handler_table, | |
548 ImplicitExceptionTable* nul_chk_table, | |
549 AbstractCompiler* compiler, | |
550 int comp_level | |
551 ) | |
552 { | |
553 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
554 // create nmethod | |
555 nmethod* nm = NULL; | |
556 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
557 int nmethod_size = | |
558 allocation_size(code_buffer, sizeof(nmethod)) | |
559 + adjust_pcs_size(debug_info->pcs_size()) | |
560 + round_to(dependencies->size_in_bytes() , oopSize) | |
561 + round_to(handler_table->size_in_bytes(), oopSize) | |
562 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
563 + round_to(debug_info->data_size() , oopSize); | |
564 nm = new (nmethod_size) | |
565 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
566 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
567 oop_maps, | |
568 handler_table, | |
569 nul_chk_table, | |
570 compiler, | |
571 comp_level); | |
572 if (nm != NULL) { | |
573 // To make dependency checking during class loading fast, record | |
574 // the nmethod dependencies in the classes it is dependent on. | |
575 // This allows the dependency checking code to simply walk the | |
576 // class hierarchy above the loaded class, checking only nmethods | |
577 // which are dependent on those classes. The slow way is to | |
578 // check every nmethod for dependencies which makes it linear in | |
579 // the number of methods compiled. For applications with a lot | |
580 // classes the slow way is too slow. | |
581 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
582 klassOop klass = deps.context_type(); | |
583 if (klass == NULL) continue; // ignore things like evol_method | |
584 | |
585 // record this nmethod as dependent on this klass | |
586 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
587 } | |
588 } | |
589 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
590 if (PrintAssembly && nm != NULL) | |
591 Disassembler::decode(nm); | |
592 } | |
593 | |
594 // verify nmethod | |
595 debug_only(if (nm) nm->verify();) // might block | |
596 | |
597 if (nm != NULL) { | |
598 nm->log_new_nmethod(); | |
599 } | |
600 | |
601 // done | |
602 return nm; | |
603 } | |
604 | |
605 | |
606 // For native wrappers | |
607 nmethod::nmethod( | |
608 methodOop method, | |
609 int nmethod_size, | |
610 CodeOffsets* offsets, | |
611 CodeBuffer* code_buffer, | |
612 int frame_size, | |
613 ByteSize basic_lock_owner_sp_offset, | |
614 ByteSize basic_lock_sp_offset, | |
615 OopMapSet* oop_maps ) | |
616 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
617 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 618 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
619 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 620 { |
621 { | |
622 debug_only(No_Safepoint_Verifier nsv;) | |
623 assert_locked_or_safepoint(CodeCache_lock); | |
624 | |
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625 init_defaults(); |
0 | 626 _method = method; |
627 _entry_bci = InvocationEntryBci; | |
628 // We have no exception handler or deopt handler make the | |
629 // values something that will never match a pc like the nmethod vtable entry | |
630 _exception_offset = 0; | |
631 _deoptimize_offset = 0; | |
1204 | 632 _deoptimize_mh_offset = 0; |
0 | 633 _orig_pc_offset = 0; |
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634 |
1748 | 635 _consts_offset = data_offset(); |
0 | 636 _stub_offset = data_offset(); |
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637 _oops_offset = data_offset(); |
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638 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 639 _scopes_pcs_offset = _scopes_data_offset; |
640 _dependencies_offset = _scopes_pcs_offset; | |
641 _handler_table_offset = _dependencies_offset; | |
642 _nul_chk_table_offset = _handler_table_offset; | |
643 _nmethod_end_offset = _nul_chk_table_offset; | |
644 _compile_id = 0; // default | |
645 _comp_level = CompLevel_none; | |
1748 | 646 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
647 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 648 _osr_entry_point = NULL; |
649 _exception_cache = NULL; | |
650 _pc_desc_cache.reset_to(NULL); | |
651 | |
652 code_buffer->copy_oops_to(this); | |
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653 debug_only(verify_scavenge_root_oops()); |
0 | 654 CodeCache::commit(this); |
655 } | |
656 | |
657 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
658 ttyLocker ttyl; // keep the following output all in one block | |
659 // This output goes directly to the tty, not the compiler log. | |
660 // To enable tools to match it up with the compilation activity, | |
661 // be sure to tag this tty output with the compile ID. | |
662 if (xtty != NULL) { | |
663 xtty->begin_head("print_native_nmethod"); | |
664 xtty->method(_method); | |
665 xtty->stamp(); | |
666 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
667 } | |
668 // print the header part first | |
669 print(); | |
670 // then print the requested information | |
671 if (PrintNativeNMethods) { | |
672 print_code(); | |
673 oop_maps->print(); | |
674 } | |
675 if (PrintRelocations) { | |
676 print_relocations(); | |
677 } | |
678 if (xtty != NULL) { | |
679 xtty->tail("print_native_nmethod"); | |
680 } | |
681 } | |
682 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
683 } | |
684 | |
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685 // For dtrace wrappers |
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686 #ifdef HAVE_DTRACE_H |
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687 nmethod::nmethod( |
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688 methodOop method, |
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689 int nmethod_size, |
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690 CodeOffsets* offsets, |
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691 CodeBuffer* code_buffer, |
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692 int frame_size) |
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693 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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694 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 695 _native_receiver_sp_offset(in_ByteSize(-1)), |
696 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
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697 { |
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698 { |
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699 debug_only(No_Safepoint_Verifier nsv;) |
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700 assert_locked_or_safepoint(CodeCache_lock); |
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701 |
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702 init_defaults(); |
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703 _method = method; |
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704 _entry_bci = InvocationEntryBci; |
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705 // We have no exception handler or deopt handler make the |
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706 // values something that will never match a pc like the nmethod vtable entry |
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707 _exception_offset = 0; |
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708 _deoptimize_offset = 0; |
1204 | 709 _deoptimize_mh_offset = 0; |
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710 _unwind_handler_offset = -1; |
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711 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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712 _orig_pc_offset = 0; |
1748 | 713 _consts_offset = data_offset(); |
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714 _stub_offset = data_offset(); |
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715 _oops_offset = data_offset(); |
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716 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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717 _scopes_pcs_offset = _scopes_data_offset; |
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718 _dependencies_offset = _scopes_pcs_offset; |
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719 _handler_table_offset = _dependencies_offset; |
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720 _nul_chk_table_offset = _handler_table_offset; |
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721 _nmethod_end_offset = _nul_chk_table_offset; |
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722 _compile_id = 0; // default |
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723 _comp_level = CompLevel_none; |
1748 | 724 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
725 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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726 _osr_entry_point = NULL; |
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727 _exception_cache = NULL; |
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728 _pc_desc_cache.reset_to(NULL); |
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729 |
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730 code_buffer->copy_oops_to(this); |
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731 debug_only(verify_scavenge_root_oops()); |
116
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732 CodeCache::commit(this); |
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733 } |
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734 |
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735 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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736 ttyLocker ttyl; // keep the following output all in one block |
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737 // This output goes directly to the tty, not the compiler log. |
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738 // To enable tools to match it up with the compilation activity, |
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739 // be sure to tag this tty output with the compile ID. |
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740 if (xtty != NULL) { |
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741 xtty->begin_head("print_dtrace_nmethod"); |
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742 xtty->method(_method); |
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743 xtty->stamp(); |
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744 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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745 } |
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746 // print the header part first |
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747 print(); |
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748 // then print the requested information |
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749 if (PrintNMethods) { |
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750 print_code(); |
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751 } |
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752 if (PrintRelocations) { |
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753 print_relocations(); |
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754 } |
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755 if (xtty != NULL) { |
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756 xtty->tail("print_dtrace_nmethod"); |
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757 } |
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758 } |
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759 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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760 } |
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761 #endif // def HAVE_DTRACE_H |
0 | 762 |
763 void* nmethod::operator new(size_t size, int nmethod_size) { | |
764 // Always leave some room in the CodeCache for I2C/C2I adapters | |
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765 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) return NULL; |
0 | 766 return CodeCache::allocate(nmethod_size); |
767 } | |
768 | |
769 | |
770 nmethod::nmethod( | |
771 methodOop method, | |
772 int nmethod_size, | |
773 int compile_id, | |
774 int entry_bci, | |
775 CodeOffsets* offsets, | |
776 int orig_pc_offset, | |
777 DebugInformationRecorder* debug_info, | |
778 Dependencies* dependencies, | |
779 CodeBuffer *code_buffer, | |
780 int frame_size, | |
781 OopMapSet* oop_maps, | |
782 ExceptionHandlerTable* handler_table, | |
783 ImplicitExceptionTable* nul_chk_table, | |
784 AbstractCompiler* compiler, | |
785 int comp_level | |
786 ) | |
787 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
788 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 789 _native_receiver_sp_offset(in_ByteSize(-1)), |
790 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 791 { |
792 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
793 { | |
794 debug_only(No_Safepoint_Verifier nsv;) | |
795 assert_locked_or_safepoint(CodeCache_lock); | |
796 | |
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797 init_defaults(); |
0 | 798 _method = method; |
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799 _entry_bci = entry_bci; |
0 | 800 _compile_id = compile_id; |
801 _comp_level = comp_level; | |
802 _compiler = compiler; | |
803 _orig_pc_offset = orig_pc_offset; | |
1748 | 804 |
805 // Section offsets | |
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806 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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807 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 808 |
809 // Exception handler and deopt handler are in the stub section | |
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810 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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811 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 812 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
813 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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814 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
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815 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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816 } else { |
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817 _deoptimize_mh_offset = -1; |
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818 } |
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819 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 820 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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821 } else { |
1748 | 822 _unwind_handler_offset = -1; |
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823 } |
1748 | 824 |
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825 _oops_offset = data_offset(); |
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826 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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827 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 828 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
829 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
830 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
831 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
832 | |
1748 | 833 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
834 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
835 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 836 _exception_cache = NULL; |
837 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
838 | |
839 // Copy contents of ScopeDescRecorder to nmethod | |
840 code_buffer->copy_oops_to(this); | |
841 debug_info->copy_to(this); | |
842 dependencies->copy_to(this); | |
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843 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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844 CodeCache::add_scavenge_root_nmethod(this); |
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845 } |
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846 debug_only(verify_scavenge_root_oops()); |
0 | 847 |
848 CodeCache::commit(this); | |
849 | |
850 // Copy contents of ExceptionHandlerTable to nmethod | |
851 handler_table->copy_to(this); | |
852 nul_chk_table->copy_to(this); | |
853 | |
854 // we use the information of entry points to find out if a method is | |
855 // static or non static | |
856 assert(compiler->is_c2() || | |
857 _method->is_static() == (entry_point() == _verified_entry_point), | |
858 " entry points must be same for static methods and vice versa"); | |
859 } | |
860 | |
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861 bool printnmethods = PrintNMethods |
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862 || CompilerOracle::should_print(_method) |
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863 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 864 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
865 print_nmethod(printnmethods); | |
866 } | |
867 | |
868 // Note: Do not verify in here as the CodeCache_lock is | |
869 // taken which would conflict with the CompiledIC_lock | |
870 // which taken during the verification of call sites. | |
871 // (was bug - gri 10/25/99) | |
872 | |
873 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
874 } | |
875 | |
876 | |
877 // Print a short set of xml attributes to identify this nmethod. The | |
878 // output should be embedded in some other element. | |
879 void nmethod::log_identity(xmlStream* log) const { | |
880 log->print(" compile_id='%d'", compile_id()); | |
881 const char* nm_kind = compile_kind(); | |
882 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
883 if (compiler() != NULL) { | |
884 log->print(" compiler='%s'", compiler()->name()); | |
885 } | |
1783 | 886 if (TieredCompilation) { |
887 log->print(" level='%d'", comp_level()); | |
888 } | |
0 | 889 } |
890 | |
891 | |
892 #define LOG_OFFSET(log, name) \ | |
893 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
894 log->print(" " XSTR(name) "_offset='%d'" , \ | |
895 (intptr_t)name##_begin() - (intptr_t)this) | |
896 | |
897 | |
898 void nmethod::log_new_nmethod() const { | |
899 if (LogCompilation && xtty != NULL) { | |
900 ttyLocker ttyl; | |
901 HandleMark hm; | |
902 xtty->begin_elem("nmethod"); | |
903 log_identity(xtty); | |
1748 | 904 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 905 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
906 | |
907 LOG_OFFSET(xtty, relocation); | |
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908 LOG_OFFSET(xtty, consts); |
1748 | 909 LOG_OFFSET(xtty, insts); |
0 | 910 LOG_OFFSET(xtty, stub); |
911 LOG_OFFSET(xtty, scopes_data); | |
912 LOG_OFFSET(xtty, scopes_pcs); | |
913 LOG_OFFSET(xtty, dependencies); | |
914 LOG_OFFSET(xtty, handler_table); | |
915 LOG_OFFSET(xtty, nul_chk_table); | |
916 LOG_OFFSET(xtty, oops); | |
917 | |
918 xtty->method(method()); | |
919 xtty->stamp(); | |
920 xtty->end_elem(); | |
921 } | |
922 } | |
923 | |
924 #undef LOG_OFFSET | |
925 | |
926 | |
1783 | 927 void nmethod::print_compilation(outputStream *st, const char *method_name, const char *title, |
928 methodOop method, bool is_blocking, int compile_id, int bci, int comp_level) { | |
929 bool is_synchronized = false, has_xhandler = false, is_native = false; | |
930 int code_size = -1; | |
931 if (method != NULL) { | |
932 is_synchronized = method->is_synchronized(); | |
933 has_xhandler = method->has_exception_handler(); | |
934 is_native = method->is_native(); | |
935 code_size = method->code_size(); | |
936 } | |
937 // print compilation number | |
938 st->print("%7d %3d", (int)tty->time_stamp().milliseconds(), compile_id); | |
939 | |
940 // print method attributes | |
941 const bool is_osr = bci != InvocationEntryBci; | |
942 const char blocking_char = is_blocking ? 'b' : ' '; | |
943 const char compile_type = is_osr ? '%' : ' '; | |
944 const char sync_char = is_synchronized ? 's' : ' '; | |
945 const char exception_char = has_xhandler ? '!' : ' '; | |
946 const char native_char = is_native ? 'n' : ' '; | |
947 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); | |
948 if (TieredCompilation) { | |
949 st->print("%d ", comp_level); | |
950 } | |
951 | |
952 // print optional title | |
953 bool do_nl = false; | |
954 if (title != NULL) { | |
955 int tlen = (int) strlen(title); | |
956 bool do_nl = false; | |
957 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } | |
958 st->print("%.*s", tlen, title); | |
959 } else { | |
960 do_nl = true; | |
961 } | |
962 | |
963 // print method name string if given | |
964 if (method_name != NULL) { | |
965 st->print(method_name); | |
966 } else { | |
967 // otherwise as the method to print itself | |
968 if (method != NULL && !Universe::heap()->is_gc_active()) { | |
969 method->print_short_name(st); | |
970 } else { | |
971 st->print("(method)"); | |
972 } | |
973 } | |
974 | |
975 if (method != NULL) { | |
976 // print osr_bci if any | |
977 if (is_osr) st->print(" @ %d", bci); | |
978 // print method size | |
979 st->print(" (%d bytes)", code_size); | |
980 } | |
981 if (do_nl) st->cr(); | |
982 } | |
983 | |
0 | 984 // Print out more verbose output usually for a newly created nmethod. |
985 void nmethod::print_on(outputStream* st, const char* title) const { | |
986 if (st != NULL) { | |
987 ttyLocker ttyl; | |
1783 | 988 print_compilation(st, /*method_name*/NULL, title, |
989 method(), /*is_blocking*/false, | |
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990 compile_id(), |
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991 is_osr_method() ? osr_entry_bci() : InvocationEntryBci, |
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992 comp_level()); |
0 | 993 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
994 } | |
995 } | |
996 | |
997 | |
998 void nmethod::print_nmethod(bool printmethod) { | |
999 ttyLocker ttyl; // keep the following output all in one block | |
1000 if (xtty != NULL) { | |
1001 xtty->begin_head("print_nmethod"); | |
1002 xtty->stamp(); | |
1003 xtty->end_head(); | |
1004 } | |
1005 // print the header part first | |
1006 print(); | |
1007 // then print the requested information | |
1008 if (printmethod) { | |
1009 print_code(); | |
1010 print_pcs(); | |
1011 oop_maps()->print(); | |
1012 } | |
1013 if (PrintDebugInfo) { | |
1014 print_scopes(); | |
1015 } | |
1016 if (PrintRelocations) { | |
1017 print_relocations(); | |
1018 } | |
1019 if (PrintDependencies) { | |
1020 print_dependencies(); | |
1021 } | |
1022 if (PrintExceptionHandlers) { | |
1023 print_handler_table(); | |
1024 print_nul_chk_table(); | |
1025 } | |
1026 if (xtty != NULL) { | |
1027 xtty->tail("print_nmethod"); | |
1028 } | |
1029 } | |
1030 | |
1031 | |
1563
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1032 // Promote one word from an assembly-time handle to a live embedded oop. |
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1033 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1034 if (handle == NULL || |
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1035 // As a special case, IC oops are initialized to 1 or -1. |
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1036 handle == (jobject) Universe::non_oop_word()) { |
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1037 (*dest) = (oop) handle; |
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1038 } else { |
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1039 (*dest) = JNIHandles::resolve_non_null(handle); |
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1040 } |
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1041 } |
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1042 |
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1043 |
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1044 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1045 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1046 int length = array->length(); |
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1047 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1048 oop* dest = oops_begin(); |
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1049 for (int index = 0 ; index < length; index++) { |
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1050 initialize_immediate_oop(&dest[index], array->at(index)); |
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1051 } |
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1052 |
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1053 // Now we can fix up all the oops in the code. We need to do this |
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1054 // in the code because the assembler uses jobjects as placeholders. |
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1055 // The code and relocations have already been initialized by the |
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1056 // CodeBlob constructor, so it is valid even at this early point to |
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1057 // iterate over relocations and patch the code. |
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1058 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1059 } |
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1060 |
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1061 |
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1062 bool nmethod::is_at_poll_return(address pc) { |
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1063 RelocIterator iter(this, pc, pc+1); |
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1064 while (iter.next()) { |
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1065 if (iter.type() == relocInfo::poll_return_type) |
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1066 return true; |
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1067 } |
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1068 return false; |
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1069 } |
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1070 |
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1071 |
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1072 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1073 RelocIterator iter(this, pc, pc+1); |
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1074 while (iter.next()) { |
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1075 relocInfo::relocType t = iter.type(); |
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1076 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1077 return true; |
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1078 } |
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1079 return false; |
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1080 } |
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1081 |
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1082 |
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1083 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1084 // re-patch all oop-bearing instructions, just in case some oops moved |
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1085 RelocIterator iter(this, begin, end); |
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1086 while (iter.next()) { |
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1087 if (iter.type() == relocInfo::oop_type) { |
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1088 oop_Relocation* reloc = iter.oop_reloc(); |
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1089 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1090 oop* dest = reloc->oop_addr(); |
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1091 initialize_immediate_oop(dest, (jobject) *dest); |
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1092 } |
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1093 // Refresh the oop-related bits of this instruction. |
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1094 reloc->fix_oop_relocation(); |
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1095 } |
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1096 |
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1097 // There must not be any interfering patches or breakpoints. |
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1098 assert(!(iter.type() == relocInfo::breakpoint_type |
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1099 && iter.breakpoint_reloc()->active()), |
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1100 "no active breakpoint"); |
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1101 } |
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1102 } |
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1103 |
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1104 |
0 | 1105 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1106 PcDesc* pd = pc_desc_at(pc); | |
1107 guarantee(pd != NULL, "scope must be present"); | |
1108 return new ScopeDesc(this, pd->scope_decode_offset(), | |
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1109 pd->obj_decode_offset(), pd->should_reexecute(), |
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1110 pd->return_oop()); |
0 | 1111 } |
1112 | |
1113 | |
1114 void nmethod::clear_inline_caches() { | |
1115 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1116 if (is_zombie()) { | |
1117 return; | |
1118 } | |
1119 | |
1120 RelocIterator iter(this); | |
1121 while (iter.next()) { | |
1122 iter.reloc()->clear_inline_cache(); | |
1123 } | |
1124 } | |
1125 | |
1126 | |
1127 void nmethod::cleanup_inline_caches() { | |
1128 | |
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1129 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1130 |
1131 // If the method is not entrant or zombie then a JMP is plastered over the | |
1132 // first few bytes. If an oop in the old code was there, that oop | |
1133 // should not get GC'd. Skip the first few bytes of oops on | |
1134 // not-entrant methods. | |
1135 address low_boundary = verified_entry_point(); | |
1136 if (!is_in_use()) { | |
1137 low_boundary += NativeJump::instruction_size; | |
1138 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1139 // This means that the low_boundary is going to be a little too high. | |
1140 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1141 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1142 } | |
1143 | |
1144 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1145 ResourceMark rm; | |
1146 RelocIterator iter(this, low_boundary); | |
1147 while(iter.next()) { | |
1148 switch(iter.type()) { | |
1149 case relocInfo::virtual_call_type: | |
1150 case relocInfo::opt_virtual_call_type: { | |
1151 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1152 // Ok, to lookup references to zombies here | |
1153 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1154 if( cb != NULL && cb->is_nmethod() ) { | |
1155 nmethod* nm = (nmethod*)cb; | |
1156 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1157 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1158 } |
1159 break; | |
1160 } | |
1161 case relocInfo::static_call_type: { | |
1162 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1163 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1164 if( cb != NULL && cb->is_nmethod() ) { | |
1165 nmethod* nm = (nmethod*)cb; | |
1166 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1167 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1168 } |
1169 break; | |
1170 } | |
1171 } | |
1172 } | |
1173 } | |
1174 | |
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1175 // This is a private interface with the sweeper. |
0 | 1176 void nmethod::mark_as_seen_on_stack() { |
1177 assert(is_not_entrant(), "must be a non-entrant method"); | |
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1178 // Set the traversal mark to ensure that the sweeper does 2 |
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1179 // cleaning passes before moving to zombie. |
0 | 1180 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1181 } | |
1182 | |
1183 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
1184 bool nmethod::can_not_entrant_be_converted() { | |
1185 assert(is_not_entrant(), "must be a non-entrant method"); | |
1186 | |
1187 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1188 // count can be greater than the stack traversal count before it hits the | |
1189 // nmethod for the second time. | |
1190 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
1191 } | |
1192 | |
1193 void nmethod::inc_decompile_count() { | |
1783 | 1194 if (!is_compiled_by_c2()) return; |
0 | 1195 // Could be gated by ProfileTraps, but do not bother... |
1196 methodOop m = method(); | |
1197 if (m == NULL) return; | |
1198 methodDataOop mdo = m->method_data(); | |
1199 if (mdo == NULL) return; | |
1200 // There is a benign race here. See comments in methodDataOop.hpp. | |
1201 mdo->inc_decompile_count(); | |
1202 } | |
1203 | |
1204 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1205 | |
1206 post_compiled_method_unload(); | |
1207 | |
1208 // Since this nmethod is being unloaded, make sure that dependencies | |
1209 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1210 // indicate that this work is being done during a GC. | |
1211 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1212 assert(is_alive != NULL, "Should be non-NULL"); | |
1213 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1214 flush_dependencies(is_alive); | |
1215 | |
1216 // Break cycle between nmethod & method | |
1217 if (TraceClassUnloading && WizardMode) { | |
1218 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1219 " unloadable], methodOop(" INTPTR_FORMAT | |
1220 "), cause(" INTPTR_FORMAT ")", | |
1221 this, (address)_method, (address)cause); | |
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1222 if (!Universe::heap()->is_gc_active()) |
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1223 cause->klass()->print(); |
0 | 1224 } |
941 | 1225 // Unlink the osr method, so we do not look this up again |
1226 if (is_osr_method()) { | |
1227 invalidate_osr_method(); | |
1228 } | |
0 | 1229 // If _method is already NULL the methodOop is about to be unloaded, |
1230 // so we don't have to break the cycle. Note that it is possible to | |
1231 // have the methodOop live here, in case we unload the nmethod because | |
1232 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1233 if (_method != NULL) { | |
1234 // OSR methods point to the methodOop, but the methodOop does not | |
1235 // point back! | |
1236 if (_method->code() == this) { | |
1237 _method->clear_code(); // Break a cycle | |
1238 } | |
1239 _method = NULL; // Clear the method of this dead nmethod | |
1240 } | |
1241 // Make the class unloaded - i.e., change state and notify sweeper | |
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1242 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1243 if (is_in_use()) { |
1244 // Transitioning directly from live to unloaded -- so | |
1245 // we need to force a cache clean-up; remember this | |
1246 // for later on. | |
1247 CodeCache::set_needs_cache_clean(true); | |
1248 } | |
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1249 _state = unloaded; |
0 | 1250 |
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1251 // Log the unloading. |
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1252 log_state_change(); |
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1253 |
0 | 1254 // The methodOop is gone at this point |
1255 assert(_method == NULL, "Tautology"); | |
1256 | |
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1257 set_osr_link(NULL); |
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1258 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1259 NMethodSweeper::notify(this); |
1260 } | |
1261 | |
1262 void nmethod::invalidate_osr_method() { | |
1263 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1264 // Remove from list of active nmethods | |
1265 if (method() != NULL) | |
1266 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1267 // Set entry as invalid | |
1268 _entry_bci = InvalidOSREntryBci; | |
1269 } | |
1270 | |
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1271 void nmethod::log_state_change() const { |
0 | 1272 if (LogCompilation) { |
1273 if (xtty != NULL) { | |
1274 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1275 if (_state == unloaded) { |
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1276 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1277 os::current_thread_id()); |
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1278 } else { |
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1279 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1280 os::current_thread_id(), |
1644
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1281 (_state == zombie ? " zombie='1'" : "")); |
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1282 } |
0 | 1283 log_identity(xtty); |
1284 xtty->stamp(); | |
1285 xtty->end_elem(); | |
1286 } | |
1287 } | |
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1288 if (PrintCompilation && _state != unloaded) { |
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1289 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
0 | 1290 tty->cr(); |
1291 } | |
1292 } | |
1293 | |
1294 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1295 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1296 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
1297 | |
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1298 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1299 nmethodLocker nml(this); |
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1300 methodHandle the_method(method()); |
1726 | 1301 No_Safepoint_Verifier nsv; |
0 | 1302 |
1303 { | |
1206
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1304 // If the method is already zombie there is nothing to do |
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1305 if (is_zombie()) { |
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1306 return false; |
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1307 } |
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1308 |
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1309 // invalidate osr nmethod before acquiring the patching lock since |
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1310 // they both acquire leaf locks and we don't want a deadlock. |
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1311 // This logic is equivalent to the logic below for patching the |
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1312 // verified entry point of regular methods. |
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1313 if (is_osr_method()) { |
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1314 // this effectively makes the osr nmethod not entrant |
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1315 invalidate_osr_method(); |
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1316 } |
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1317 |
0 | 1318 // Enter critical section. Does not block for safepoint. |
1319 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1320 |
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1321 if (_state == state) { |
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1322 // another thread already performed this transition so nothing |
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1323 // to do, but return false to indicate this. |
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1324 return false; |
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1325 } |
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1326 |
0 | 1327 // The caller can be calling the method statically or through an inline |
1328 // cache call. | |
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1329 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1330 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1331 SharedRuntime::get_handle_wrong_method_stub()); | |
1332 } | |
1333 | |
1644
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1334 if (is_in_use()) { |
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1335 // It's a true state change, so mark the method as decompiled. |
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1336 // Do it only for transition from alive. |
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1337 inc_decompile_count(); |
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1338 } |
1206
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1339 |
0 | 1340 // Change state |
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1341 _state = state; |
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1342 |
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1343 // Log the transition once |
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1344 log_state_change(); |
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1345 |
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1346 // Remove nmethod from method. |
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1347 // We need to check if both the _code and _from_compiled_code_entry_point |
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1348 // refer to this nmethod because there is a race in setting these two fields |
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1349 // in methodOop as seen in bugid 4947125. |
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1350 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1351 // could be flushed and the compiler and vtable stubs could still call |
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1352 // through it. |
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1353 if (method() != NULL && (method()->code() == this || |
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1354 method()->from_compiled_entry() == verified_entry_point())) { |
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1355 HandleMark hm; |
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1356 method()->clear_code(); |
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1357 } |
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1358 |
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1359 if (state == not_entrant) { |
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1360 mark_as_seen_on_stack(); |
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1361 } |
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1362 |
0 | 1363 } // leave critical region under Patching_lock |
1364 | |
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1365 // When the nmethod becomes zombie it is no longer alive so the |
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1366 // dependencies must be flushed. nmethods in the not_entrant |
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1367 // state will be flushed later when the transition to zombie |
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1368 // happens or they get unloaded. |
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1369 if (state == zombie) { |
1726 | 1370 { |
1371 // Flushing dependecies must be done before any possible | |
1372 // safepoint can sneak in, otherwise the oops used by the | |
1373 // dependency logic could have become stale. | |
1374 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1375 flush_dependencies(NULL); | |
1376 } | |
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1377 |
1726 | 1378 { |
1379 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
1380 // and it hasn't already been reported for this nmethod then report it now. | |
1381 // (the event may have been reported earilier if the GC marked it for unloading). | |
1382 Pause_No_Safepoint_Verifier pnsv(&nsv); | |
1383 post_compiled_method_unload(); | |
1384 } | |
1385 | |
1386 #ifdef ASSERT | |
1387 // It's no longer safe to access the oops section since zombie | |
1388 // nmethods aren't scanned for GC. | |
1389 _oops_are_stale = true; | |
1390 #endif | |
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1391 } else { |
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1392 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1393 } |
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1394 |
0 | 1395 if (TraceCreateZombies) { |
1396 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1397 } | |
1398 | |
1399 // Make sweeper aware that there is a zombie method that needs to be removed | |
1400 NMethodSweeper::notify(this); | |
1401 | |
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1402 return true; |
0 | 1403 } |
1404 | |
1405 void nmethod::flush() { | |
1406 // Note that there are no valid oops in the nmethod anymore. | |
1407 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1408 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1409 | |
1410 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1411 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1412 |
1413 // completely deallocate this method | |
1414 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1415 if (PrintMethodFlushing) { | |
1202 | 1416 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1417 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1418 } |
1419 | |
1420 // We need to deallocate any ExceptionCache data. | |
1421 // Note that we do not need to grab the nmethod lock for this, it | |
1422 // better be thread safe if we're disposing of it! | |
1423 ExceptionCache* ec = exception_cache(); | |
1424 set_exception_cache(NULL); | |
1425 while(ec != NULL) { | |
1426 ExceptionCache* next = ec->next(); | |
1427 delete ec; | |
1428 ec = next; | |
1429 } | |
1430 | |
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1431 if (on_scavenge_root_list()) { |
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1432 CodeCache::drop_scavenge_root_nmethod(this); |
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1433 } |
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1434 |
1202 | 1435 if (is_speculatively_disconnected()) { |
1436 CodeCache::remove_saved_code(this); | |
1437 } | |
1438 | |
1692 | 1439 #ifdef SHARK |
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1440 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1441 #endif // SHARK |
1442 | |
0 | 1443 ((CodeBlob*)(this))->flush(); |
1444 | |
1445 CodeCache::free(this); | |
1446 } | |
1447 | |
1448 | |
1449 // | |
1450 // Notify all classes this nmethod is dependent on that it is no | |
1451 // longer dependent. This should only be called in two situations. | |
1452 // First, when a nmethod transitions to a zombie all dependents need | |
1453 // to be clear. Since zombification happens at a safepoint there's no | |
1454 // synchronization issues. The second place is a little more tricky. | |
1455 // During phase 1 of mark sweep class unloading may happen and as a | |
1456 // result some nmethods may get unloaded. In this case the flushing | |
1457 // of dependencies must happen during phase 1 since after GC any | |
1458 // dependencies in the unloaded nmethod won't be updated, so | |
1459 // traversing the dependency information in unsafe. In that case this | |
1460 // function is called with a non-NULL argument and this function only | |
1461 // notifies instanceKlasses that are reachable | |
1462 | |
1463 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1464 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1465 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1466 "is_alive is non-NULL if and only if we are called during GC"); | |
1467 if (!has_flushed_dependencies()) { | |
1468 set_has_flushed_dependencies(); | |
1469 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1470 klassOop klass = deps.context_type(); | |
1471 if (klass == NULL) continue; // ignore things like evol_method | |
1472 | |
1473 // During GC the is_alive closure is non-NULL, and is used to | |
1474 // determine liveness of dependees that need to be updated. | |
1475 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1476 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1477 } | |
1478 } | |
1479 } | |
1480 } | |
1481 | |
1482 | |
1483 // If this oop is not live, the nmethod can be unloaded. | |
1484 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1485 OopClosure* keep_alive, | |
1486 oop* root, bool unloading_occurred) { | |
1487 assert(root != NULL, "just checking"); | |
1488 oop obj = *root; | |
1489 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1490 return false; | |
1491 } | |
1492 if (obj->is_compiledICHolder()) { | |
1493 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1494 if (is_alive->do_object_b( | |
1495 cichk_oop->holder_method()->method_holder()) && | |
1496 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1497 // The oop should be kept alive | |
1498 keep_alive->do_oop(root); | |
1499 return false; | |
1500 } | |
1501 } | |
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1502 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1503 // simply because one of its constant oops has gone dead. |
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1504 // No actual classes need to be unloaded in order for this to occur. |
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1505 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1506 make_unloaded(is_alive, obj); |
1507 return true; | |
1508 } | |
1509 | |
1510 // ------------------------------------------------------------------ | |
1511 // post_compiled_method_load_event | |
1512 // new method for install_code() path | |
1513 // Transfer information from compilation to jvmti | |
1514 void nmethod::post_compiled_method_load_event() { | |
1515 | |
1516 methodOop moop = method(); | |
1517 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1518 moop->klass_name()->bytes(), | |
1519 moop->klass_name()->utf8_length(), | |
1520 moop->name()->bytes(), | |
1521 moop->name()->utf8_length(), | |
1522 moop->signature()->bytes(), | |
1523 moop->signature()->utf8_length(), | |
1748 | 1524 insts_begin(), insts_size()); |
0 | 1525 |
1616
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1526 if (JvmtiExport::should_post_compiled_method_load() || |
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1527 JvmtiExport::should_post_compiled_method_unload()) { |
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1528 get_and_cache_jmethod_id(); |
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1529 } |
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1530 |
0 | 1531 if (JvmtiExport::should_post_compiled_method_load()) { |
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1532 // Let the Service thread (which is a real Java thread) post the event |
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1533 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1534 JvmtiDeferredEventQueue::enqueue( |
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1535 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1536 } |
1537 } | |
1538 | |
1616
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1539 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1540 if (_jmethod_id == NULL) { |
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1541 // Cache the jmethod_id since it can no longer be looked up once the |
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1542 // method itself has been marked for unloading. |
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1543 _jmethod_id = method()->jmethod_id(); |
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1544 } |
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1545 return _jmethod_id; |
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1546 } |
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1547 |
0 | 1548 void nmethod::post_compiled_method_unload() { |
1577
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1549 if (unload_reported()) { |
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1550 // During unloading we transition to unloaded and then to zombie |
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1551 // and the unloading is reported during the first transition. |
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1552 return; |
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1553 } |
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1554 |
0 | 1555 assert(_method != NULL && !is_unloaded(), "just checking"); |
1556 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1557 | |
1558 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1559 // post the event. Sometime later this nmethod will be made a zombie |
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1560 // by the sweeper but the methodOop will not be valid at that point. |
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1561 // If the _jmethod_id is null then no load event was ever requested |
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1562 // so don't bother posting the unload. The main reason for this is |
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1563 // that the jmethodID is a weak reference to the methodOop so if |
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1564 // it's being unloaded there's no way to look it up since the weak |
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1565 // ref will have been cleared. |
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1566 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1567 assert(!unload_reported(), "already unloaded"); |
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1568 JvmtiDeferredEvent event = |
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1569 JvmtiDeferredEvent::compiled_method_unload_event( |
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1570 _jmethod_id, insts_begin()); |
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1571 if (SafepointSynchronize::is_at_safepoint()) { |
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1572 // Don't want to take the queueing lock. Add it as pending and |
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1573 // it will get enqueued later. |
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1574 JvmtiDeferredEventQueue::add_pending_event(event); |
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1575 } else { |
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1576 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1577 JvmtiDeferredEventQueue::enqueue(event); |
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1578 } |
0 | 1579 } |
1580 | |
1581 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1582 // any time. As the nmethod is being unloaded now we mark it has | |
1583 // having the unload event reported - this will ensure that we don't | |
1584 // attempt to report the event in the unlikely scenario where the | |
1585 // event is enabled at the time the nmethod is made a zombie. | |
1586 set_unload_reported(); | |
1587 } | |
1588 | |
1589 // This is called at the end of the strong tracing/marking phase of a | |
1590 // GC to unload an nmethod if it contains otherwise unreachable | |
1591 // oops. | |
1592 | |
1593 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1594 OopClosure* keep_alive, bool unloading_occurred) { | |
1595 // Make sure the oop's ready to receive visitors | |
1596 assert(!is_zombie() && !is_unloaded(), | |
1597 "should not call follow on zombie or unloaded nmethod"); | |
1598 | |
1599 // If the method is not entrant then a JMP is plastered over the | |
1600 // first few bytes. If an oop in the old code was there, that oop | |
1601 // should not get GC'd. Skip the first few bytes of oops on | |
1602 // not-entrant methods. | |
1603 address low_boundary = verified_entry_point(); | |
1604 if (is_not_entrant()) { | |
1605 low_boundary += NativeJump::instruction_size; | |
1606 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1607 // (See comment above.) | |
1608 } | |
1609 | |
1610 // The RedefineClasses() API can cause the class unloading invariant | |
1611 // to no longer be true. See jvmtiExport.hpp for details. | |
1612 // Also, leave a debugging breadcrumb in local flag. | |
1613 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1614 if (a_class_was_redefined) { | |
1615 // This set of the unloading_occurred flag is done before the | |
1616 // call to post_compiled_method_unload() so that the unloading | |
1617 // of this nmethod is reported. | |
1618 unloading_occurred = true; | |
1619 } | |
1620 | |
1621 // Follow methodOop | |
1622 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1623 return; | |
1624 } | |
1625 | |
1626 // Exception cache | |
1627 ExceptionCache* ec = exception_cache(); | |
1628 while (ec != NULL) { | |
1629 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1630 oop ex = *ex_addr; | |
1631 ExceptionCache* next_ec = ec->next(); | |
1632 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1633 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1634 remove_from_exception_cache(ec); | |
1635 } | |
1636 ec = next_ec; | |
1637 } | |
1638 | |
1639 // If class unloading occurred we first iterate over all inline caches and | |
1640 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1641 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1642 // iteration below. | |
1643 if (unloading_occurred) { | |
1644 RelocIterator iter(this, low_boundary); | |
1645 while(iter.next()) { | |
1646 if (iter.type() == relocInfo::virtual_call_type) { | |
1647 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1648 oop ic_oop = ic->cached_oop(); | |
1649 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1650 // The only exception is compiledICHolder oops which may | |
1651 // yet be marked below. (We check this further below). | |
1652 if (ic_oop->is_compiledICHolder()) { | |
1653 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1654 if (is_alive->do_object_b( | |
1655 cichk_oop->holder_method()->method_holder()) && | |
1656 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1657 continue; | |
1658 } | |
1659 } | |
1660 ic->set_to_clean(); | |
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1661 assert(ic->cached_oop() == NULL, |
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1662 "cached oop in IC should be cleared"); |
0 | 1663 } |
1664 } | |
1665 } | |
1666 } | |
1667 | |
1668 // Compiled code | |
1669 RelocIterator iter(this, low_boundary); | |
1670 while (iter.next()) { | |
1671 if (iter.type() == relocInfo::oop_type) { | |
1672 oop_Relocation* r = iter.oop_reloc(); | |
1673 // In this loop, we must only traverse those oops directly embedded in | |
1674 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1675 assert(1 == (r->oop_is_immediate()) + | |
1676 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1677 "oop must be found in exactly one place"); | |
1678 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1679 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1680 return; | |
1681 } | |
1682 } | |
1683 } | |
1684 } | |
1685 | |
1686 | |
1687 // Scopes | |
1688 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1689 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1690 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1691 return; | |
1692 } | |
1693 } | |
1694 | |
1695 #ifndef PRODUCT | |
1696 // This nmethod was not unloaded; check below that all CompiledICs | |
1697 // refer to marked oops. | |
1698 { | |
1699 RelocIterator iter(this, low_boundary); | |
1700 while (iter.next()) { | |
1701 if (iter.type() == relocInfo::virtual_call_type) { | |
1702 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1703 oop ic_oop = ic->cached_oop(); | |
1704 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1705 "Found unmarked ic_oop in reachable nmethod"); | |
1706 } | |
1707 } | |
1708 } | |
1709 #endif // !PRODUCT | |
1710 } | |
1711 | |
941 | 1712 // This method is called twice during GC -- once while |
1713 // tracing the "active" nmethods on thread stacks during | |
1714 // the (strong) marking phase, and then again when walking | |
1715 // the code cache contents during the weak roots processing | |
1716 // phase. The two uses are distinguished by means of the | |
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1717 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1718 // case. We want to walk the weak roots in the nmethod |
1719 // only in the second case. The weak roots in the nmethod | |
1720 // are the oops in the ExceptionCache and the InlineCache | |
1721 // oops. | |
994
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1722 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1723 // make sure the oops ready to receive visitors |
1724 assert(!is_zombie() && !is_unloaded(), | |
1725 "should not call follow on zombie or unloaded nmethod"); | |
1726 | |
1727 // If the method is not entrant or zombie then a JMP is plastered over the | |
1728 // first few bytes. If an oop in the old code was there, that oop | |
1729 // should not get GC'd. Skip the first few bytes of oops on | |
1730 // not-entrant methods. | |
1731 address low_boundary = verified_entry_point(); | |
1732 if (is_not_entrant()) { | |
1733 low_boundary += NativeJump::instruction_size; | |
1734 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1735 // (See comment above.) | |
1736 } | |
1737 | |
1738 // Compiled code | |
1739 f->do_oop((oop*) &_method); | |
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1740 if (!do_strong_roots_only) { |
941 | 1741 // weak roots processing phase -- update ExceptionCache oops |
1742 ExceptionCache* ec = exception_cache(); | |
1743 while(ec != NULL) { | |
1744 f->do_oop((oop*)ec->exception_type_addr()); | |
1745 ec = ec->next(); | |
1746 } | |
1747 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1748 |
1749 RelocIterator iter(this, low_boundary); | |
941 | 1750 |
0 | 1751 while (iter.next()) { |
1752 if (iter.type() == relocInfo::oop_type ) { | |
1753 oop_Relocation* r = iter.oop_reloc(); | |
1754 // In this loop, we must only follow those oops directly embedded in | |
1755 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1756 assert(1 == (r->oop_is_immediate()) + |
1757 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1758 "oop must be found in exactly one place"); | |
0 | 1759 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1760 f->do_oop(r->oop_addr()); | |
1761 } | |
1762 } | |
1763 } | |
1764 | |
1765 // Scopes | |
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1766 // This includes oop constants not inlined in the code stream. |
0 | 1767 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1768 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1769 f->do_oop(p); | |
1770 } | |
1771 } | |
1772 | |
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1773 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1774 |
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1775 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1776 |
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1777 // An nmethod is "marked" if its _mark_link is set non-null. |
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1778 // Even if it is the end of the linked list, it will have a non-null link value, |
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1779 // as long as it is on the list. |
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1780 // This code must be MP safe, because it is used from parallel GC passes. |
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1781 bool nmethod::test_set_oops_do_mark() { |
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1782 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1783 nmethod* observed_mark_link = _oops_do_mark_link; |
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1784 if (observed_mark_link == NULL) { |
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1785 // Claim this nmethod for this thread to mark. |
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|
1786 observed_mark_link = (nmethod*) |
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1787 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1788 if (observed_mark_link == NULL) { |
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1789 |
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1790 // Atomically append this nmethod (now claimed) to the head of the list: |
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1791 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1792 for (;;) { |
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1793 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1794 _oops_do_mark_link = required_mark_nmethods; |
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1795 observed_mark_nmethods = (nmethod*) |
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1796 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1797 if (observed_mark_nmethods == required_mark_nmethods) |
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1798 break; |
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1799 } |
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1800 // Mark was clear when we first saw this guy. |
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1801 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1802 return false; |
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1803 } |
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1804 } |
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1805 // On fall through, another racing thread marked this nmethod before we did. |
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1806 return true; |
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1807 } |
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1808 |
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1809 void nmethod::oops_do_marking_prologue() { |
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1810 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1811 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1812 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1813 // may fork a bunch of threads, and we need them all to see the same state. |
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1814 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1815 guarantee(observed == NULL, "no races in this sequential code"); |
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1816 } |
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1817 |
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1818 void nmethod::oops_do_marking_epilogue() { |
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1819 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1820 nmethod* cur = _oops_do_mark_nmethods; |
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1821 while (cur != NMETHOD_SENTINEL) { |
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1822 assert(cur != NULL, "not NULL-terminated"); |
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1823 nmethod* next = cur->_oops_do_mark_link; |
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1824 cur->_oops_do_mark_link = NULL; |
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1825 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1826 cur = next; |
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1827 } |
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1828 void* required = _oops_do_mark_nmethods; |
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1829 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1830 guarantee(observed == required, "no races in this sequential code"); |
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1831 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1832 } |
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1833 |
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1834 class DetectScavengeRoot: public OopClosure { |
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1835 bool _detected_scavenge_root; |
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1836 public: |
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1837 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1838 { NOT_PRODUCT(_print_nm = NULL); } |
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1839 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1840 virtual void do_oop(oop* p) { |
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1841 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1842 NOT_PRODUCT(maybe_print(p)); |
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1843 _detected_scavenge_root = true; |
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1844 } |
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1845 } |
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1846 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1847 |
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1848 #ifndef PRODUCT |
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1849 nmethod* _print_nm; |
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1850 void maybe_print(oop* p) { |
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1851 if (_print_nm == NULL) return; |
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1852 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1853 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1854 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1855 (intptr_t)(*p), (intptr_t)p); |
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1856 (*p)->print(); |
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1857 } |
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1858 #endif //PRODUCT |
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1859 }; |
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1860 |
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1861 bool nmethod::detect_scavenge_root_oops() { |
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1862 DetectScavengeRoot detect_scavenge_root; |
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1863 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1864 oops_do(&detect_scavenge_root); |
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1865 return detect_scavenge_root.detected_scavenge_root(); |
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1866 } |
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1867 |
0 | 1868 // Method that knows how to preserve outgoing arguments at call. This method must be |
1869 // called with a frame corresponding to a Java invoke | |
1870 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1871 #ifndef SHARK |
0 | 1872 if (!method()->is_native()) { |
1873 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1874 Bytecode_invoke call(ssd.method(), ssd.bci()); |
1875 bool has_receiver = call.has_receiver(); | |
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1876 Symbol* signature = call.signature(); |
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1877 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1878 } |
1692 | 1879 #endif // !SHARK |
0 | 1880 } |
1881 | |
1882 | |
1883 oop nmethod::embeddedOop_at(u_char* p) { | |
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1884 RelocIterator iter(this, p, p + 1); |
0 | 1885 while (iter.next()) |
1886 if (iter.type() == relocInfo::oop_type) { | |
1887 return iter.oop_reloc()->oop_value(); | |
1888 } | |
1889 return NULL; | |
1890 } | |
1891 | |
1892 | |
1893 inline bool includes(void* p, void* from, void* to) { | |
1894 return from <= p && p < to; | |
1895 } | |
1896 | |
1897 | |
1898 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1899 assert(count >= 2, "must be sentinel values, at least"); | |
1900 | |
1901 #ifdef ASSERT | |
1902 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1903 int prev_offset = pcs[0].pc_offset(); | |
1904 assert(prev_offset == PcDesc::lower_offset_limit, | |
1905 "must start with a sentinel"); | |
1906 for (int i = 1; i < count; i++) { | |
1907 int this_offset = pcs[i].pc_offset(); | |
1908 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1909 prev_offset = this_offset; | |
1910 } | |
1911 assert(prev_offset == PcDesc::upper_offset_limit, | |
1912 "must end with a sentinel"); | |
1913 #endif //ASSERT | |
1914 | |
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1915 // Search for MethodHandle invokes and tag the nmethod. |
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1916 for (int i = 0; i < count; i++) { |
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1917 if (pcs[i].is_method_handle_invoke()) { |
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1918 set_has_method_handle_invokes(true); |
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1919 break; |
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1920 } |
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1921 } |
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1922 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1923 |
0 | 1924 int size = count * sizeof(PcDesc); |
1925 assert(scopes_pcs_size() >= size, "oob"); | |
1926 memcpy(scopes_pcs_begin(), pcs, size); | |
1927 | |
1928 // Adjust the final sentinel downward. | |
1929 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1930 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1931 last_pc->set_pc_offset(content_size() + 1); |
0 | 1932 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1933 // Fill any rounding gaps with copies of the last record. | |
1934 last_pc[1] = last_pc[0]; | |
1935 } | |
1936 // The following assert could fail if sizeof(PcDesc) is not | |
1937 // an integral multiple of oopSize (the rounding term). | |
1938 // If it fails, change the logic to always allocate a multiple | |
1939 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1940 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1941 } | |
1942 | |
1943 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1944 assert(scopes_data_size() >= size, "oob"); | |
1945 memcpy(scopes_data_begin(), buffer, size); | |
1946 } | |
1947 | |
1948 | |
1949 #ifdef ASSERT | |
1950 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1951 PcDesc* lower = nm->scopes_pcs_begin(); | |
1952 PcDesc* upper = nm->scopes_pcs_end(); | |
1953 lower += 1; // exclude initial sentinel | |
1954 PcDesc* res = NULL; | |
1955 for (PcDesc* p = lower; p < upper; p++) { | |
1956 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1957 if (match_desc(p, pc_offset, approximate)) { | |
1958 if (res == NULL) | |
1959 res = p; | |
1960 else | |
1961 res = (PcDesc*) badAddress; | |
1962 } | |
1963 } | |
1964 return res; | |
1965 } | |
1966 #endif | |
1967 | |
1968 | |
1969 // Finds a PcDesc with real-pc equal to "pc" | |
1970 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1971 address base_address = code_begin(); |
0 | 1972 if ((pc < base_address) || |
1973 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1974 return NULL; // PC is wildly out of range | |
1975 } | |
1976 int pc_offset = (int) (pc - base_address); | |
1977 | |
1978 // Check the PcDesc cache if it contains the desired PcDesc | |
1979 // (This as an almost 100% hit rate.) | |
1980 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1981 if (res != NULL) { | |
1982 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1983 return res; | |
1984 } | |
1985 | |
1986 // Fallback algorithm: quasi-linear search for the PcDesc | |
1987 // Find the last pc_offset less than the given offset. | |
1988 // The successor must be the required match, if there is a match at all. | |
1989 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1990 PcDesc* lower = scopes_pcs_begin(); | |
1991 PcDesc* upper = scopes_pcs_end(); | |
1992 upper -= 1; // exclude final sentinel | |
1993 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1994 | |
1995 #define assert_LU_OK \ | |
1996 /* invariant on lower..upper during the following search: */ \ | |
1997 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1998 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1999 assert_LU_OK; | |
2000 | |
2001 // Use the last successful return as a split point. | |
2002 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2003 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2004 if (mid->pc_offset() < pc_offset) { | |
2005 lower = mid; | |
2006 } else { | |
2007 upper = mid; | |
2008 } | |
2009 | |
2010 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2011 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2012 const int RADIX = (1 << LOG2_RADIX); | |
2013 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2014 while ((mid = lower + step) < upper) { | |
2015 assert_LU_OK; | |
2016 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2017 if (mid->pc_offset() < pc_offset) { | |
2018 lower = mid; | |
2019 } else { | |
2020 upper = mid; | |
2021 break; | |
2022 } | |
2023 } | |
2024 assert_LU_OK; | |
2025 } | |
2026 | |
2027 // Sneak up on the value with a linear search of length ~16. | |
2028 while (true) { | |
2029 assert_LU_OK; | |
2030 mid = lower + 1; | |
2031 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2032 if (mid->pc_offset() < pc_offset) { | |
2033 lower = mid; | |
2034 } else { | |
2035 upper = mid; | |
2036 break; | |
2037 } | |
2038 } | |
2039 #undef assert_LU_OK | |
2040 | |
2041 if (match_desc(upper, pc_offset, approximate)) { | |
2042 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2043 _pc_desc_cache.add_pc_desc(upper); | |
2044 return upper; | |
2045 } else { | |
2046 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2047 return NULL; | |
2048 } | |
2049 } | |
2050 | |
2051 | |
2052 bool nmethod::check_all_dependencies() { | |
2053 bool found_check = false; | |
2054 // wholesale check of all dependencies | |
2055 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2056 if (deps.check_dependency() != NULL) { | |
2057 found_check = true; | |
2058 NOT_DEBUG(break); | |
2059 } | |
2060 } | |
2061 return found_check; // tell caller if we found anything | |
2062 } | |
2063 | |
2064 bool nmethod::check_dependency_on(DepChange& changes) { | |
2065 // What has happened: | |
2066 // 1) a new class dependee has been added | |
2067 // 2) dependee and all its super classes have been marked | |
2068 bool found_check = false; // set true if we are upset | |
2069 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2070 // Evaluate only relevant dependencies. | |
2071 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2072 found_check = true; | |
2073 NOT_DEBUG(break); | |
2074 } | |
2075 } | |
2076 return found_check; | |
2077 } | |
2078 | |
2079 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2080 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2081 objArrayOop dependee_methods = dependee_ik->methods(); | |
2082 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2083 if (deps.type() == Dependencies::evol_method) { | |
2084 methodOop method = deps.method_argument(0); | |
2085 for (int j = 0; j < dependee_methods->length(); j++) { | |
2086 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2087 // RC_TRACE macro has an embedded ResourceMark | |
2088 RC_TRACE(0x01000000, | |
2089 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2090 _method->method_holder()->klass_part()->external_name(), | |
2091 _method->name()->as_C_string(), | |
2092 _method->signature()->as_C_string(), compile_id(), | |
2093 method->method_holder()->klass_part()->external_name(), | |
2094 method->name()->as_C_string(), | |
2095 method->signature()->as_C_string())); | |
2096 if (TraceDependencies || LogCompilation) | |
2097 deps.log_dependency(dependee); | |
2098 return true; | |
2099 } | |
2100 } | |
2101 } | |
2102 } | |
2103 return false; | |
2104 } | |
2105 | |
2106 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2107 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2108 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2109 if (deps.type() != Dependencies::evol_method) | |
2110 continue; | |
2111 methodOop method = deps.method_argument(0); | |
2112 if (method == dependee) return true; | |
2113 } | |
2114 return false; | |
2115 } | |
2116 | |
2117 | |
2118 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2119 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2120 if (is_zombie()) { |
2121 // a zombie may never be patched | |
2122 return false; | |
2123 } | |
2124 return true; | |
2125 } | |
2126 | |
2127 | |
2128 address nmethod::continuation_for_implicit_exception(address pc) { | |
2129 // Exception happened outside inline-cache check code => we are inside | |
2130 // an active nmethod => use cpc to determine a return address | |
1748 | 2131 int exception_offset = pc - code_begin(); |
0 | 2132 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2133 #ifdef ASSERT | |
2134 if (cont_offset == 0) { | |
2135 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2136 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2137 HandleMark hm(thread); | |
2138 ResourceMark rm(thread); | |
2139 CodeBlob* cb = CodeCache::find_blob(pc); | |
2140 assert(cb != NULL && cb == this, ""); | |
2141 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2142 print(); | |
2143 method()->print_codes(); | |
2144 print_code(); | |
2145 print_pcs(); | |
2146 } | |
2147 #endif | |
1250 | 2148 if (cont_offset == 0) { |
2149 // Let the normal error handling report the exception | |
2150 return NULL; | |
2151 } | |
1748 | 2152 return code_begin() + cont_offset; |
0 | 2153 } |
2154 | |
2155 | |
2156 | |
2157 void nmethod_init() { | |
2158 // make sure you didn't forget to adjust the filler fields | |
2159 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2160 } | |
2161 | |
2162 | |
2163 //------------------------------------------------------------------------------------------- | |
2164 | |
2165 | |
2166 // QQQ might we make this work from a frame?? | |
2167 nmethodLocker::nmethodLocker(address pc) { | |
2168 CodeBlob* cb = CodeCache::find_blob(pc); | |
2169 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2170 _nm = (nmethod*)cb; | |
2171 lock_nmethod(_nm); | |
2172 } | |
2173 | |
2174 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
2175 if (nm == NULL) return; | |
2176 Atomic::inc(&nm->_lock_count); | |
2177 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
2178 } | |
2179 | |
2180 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2181 if (nm == NULL) return; | |
2182 Atomic::dec(&nm->_lock_count); | |
2183 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2184 } | |
2185 | |
1204 | 2186 |
2187 // ----------------------------------------------------------------------------- | |
2188 // nmethod::get_deopt_original_pc | |
2189 // | |
2190 // Return the original PC for the given PC if: | |
2191 // (a) the given PC belongs to a nmethod and | |
2192 // (b) it is a deopt PC | |
2193 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2194 if (fr->cb() == NULL) return NULL; | |
2195 | |
2196 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2197 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2198 return nm->get_original_pc(fr); | |
2199 | |
2200 return NULL; | |
0 | 2201 } |
2202 | |
2203 | |
2204 // ----------------------------------------------------------------------------- | |
1135
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2205 // MethodHandle |
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2206 |
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2207 bool nmethod::is_method_handle_return(address return_pc) { |
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2208 if (!has_method_handle_invokes()) return false; |
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2209 PcDesc* pd = pc_desc_at(return_pc); |
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2210 if (pd == NULL) |
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2211 return false; |
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2212 return pd->is_method_handle_invoke(); |
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2213 } |
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2214 |
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2215 |
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2216 // ----------------------------------------------------------------------------- |
0 | 2217 // Verification |
2218 | |
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2219 class VerifyOopsClosure: public OopClosure { |
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2220 nmethod* _nm; |
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2221 bool _ok; |
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2222 public: |
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2223 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2224 bool ok() { return _ok; } |
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2225 virtual void do_oop(oop* p) { |
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2226 if ((*p) == NULL || (*p)->is_oop()) return; |
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2227 if (_ok) { |
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2228 _nm->print_nmethod(true); |
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2229 _ok = false; |
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2230 } |
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2231 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2232 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2233 } |
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2234 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2235 }; |
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2236 |
0 | 2237 void nmethod::verify() { |
2238 | |
2239 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2240 // seems odd. | |
2241 | |
2242 if( is_zombie() || is_not_entrant() ) | |
2243 return; | |
2244 | |
2245 // Make sure all the entry points are correctly aligned for patching. | |
2246 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2247 | |
2248 assert(method()->is_oop(), "must be valid"); | |
2249 | |
2250 ResourceMark rm; | |
2251 | |
2252 if (!CodeCache::contains(this)) { | |
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2253 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2254 } |
2255 | |
2256 if(is_native_method() ) | |
2257 return; | |
2258 | |
2259 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2260 if (nm != this) { | |
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2261 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2262 this)); |
0 | 2263 } |
2264 | |
2265 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2266 if (! p->verify(this)) { | |
2267 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2268 } | |
2269 } | |
2270 | |
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2271 VerifyOopsClosure voc(this); |
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2272 oops_do(&voc); |
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2273 assert(voc.ok(), "embedded oops must be OK"); |
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2274 verify_scavenge_root_oops(); |
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2275 |
0 | 2276 verify_scopes(); |
2277 } | |
2278 | |
2279 | |
2280 void nmethod::verify_interrupt_point(address call_site) { | |
2281 // This code does not work in release mode since | |
2282 // owns_lock only is available in debug mode. | |
2283 CompiledIC* ic = NULL; | |
2284 Thread *cur = Thread::current(); | |
2285 if (CompiledIC_lock->owner() == cur || | |
2286 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2287 SafepointSynchronize::is_at_safepoint())) { | |
2288 ic = CompiledIC_at(call_site); | |
2289 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2290 } else { | |
2291 MutexLocker ml_verify (CompiledIC_lock); | |
2292 ic = CompiledIC_at(call_site); | |
2293 } | |
2294 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2295 assert(pd != NULL, "PcDesc must exist"); | |
2296 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
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2297 pd->obj_decode_offset(), pd->should_reexecute(), |
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2298 pd->return_oop()); |
0 | 2299 !sd->is_top(); sd = sd->sender()) { |
2300 sd->verify(); | |
2301 } | |
2302 } | |
2303 | |
2304 void nmethod::verify_scopes() { | |
2305 if( !method() ) return; // Runtime stubs have no scope | |
2306 if (method()->is_native()) return; // Ignore stub methods. | |
2307 // iterate through all interrupt point | |
2308 // and verify the debug information is valid. | |
2309 RelocIterator iter((nmethod*)this); | |
2310 while (iter.next()) { | |
2311 address stub = NULL; | |
2312 switch (iter.type()) { | |
2313 case relocInfo::virtual_call_type: | |
2314 verify_interrupt_point(iter.addr()); | |
2315 break; | |
2316 case relocInfo::opt_virtual_call_type: | |
2317 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2318 verify_interrupt_point(iter.addr()); | |
2319 break; | |
2320 case relocInfo::static_call_type: | |
2321 stub = iter.static_call_reloc()->static_stub(); | |
2322 //verify_interrupt_point(iter.addr()); | |
2323 break; | |
2324 case relocInfo::runtime_call_type: | |
2325 address destination = iter.reloc()->value(); | |
2326 // Right now there is no way to find out which entries support | |
2327 // an interrupt point. It would be nice if we had this | |
2328 // information in a table. | |
2329 break; | |
2330 } | |
2331 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2332 } | |
2333 } | |
2334 | |
2335 | |
2336 // ----------------------------------------------------------------------------- | |
2337 // Non-product code | |
2338 #ifndef PRODUCT | |
2339 | |
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2340 class DebugScavengeRoot: public OopClosure { |
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2341 nmethod* _nm; |
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2342 bool _ok; |
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2343 public: |
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2344 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2345 bool ok() { return _ok; } |
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2346 virtual void do_oop(oop* p) { |
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2347 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2348 if (_ok) { |
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2349 _nm->print_nmethod(true); |
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2350 _ok = false; |
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2351 } |
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2352 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2353 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2354 (*p)->print(); |
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2355 } |
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|
2356 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2357 }; |
0 | 2358 |
989
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2359 void nmethod::verify_scavenge_root_oops() { |
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2360 if (!on_scavenge_root_list()) { |
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2361 // Actually look inside, to verify the claim that it's clean. |
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2362 DebugScavengeRoot debug_scavenge_root(this); |
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2363 oops_do(&debug_scavenge_root); |
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2364 if (!debug_scavenge_root.ok()) |
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2365 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2366 } |
989
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2367 assert(scavenge_root_not_marked(), ""); |
0 | 2368 } |
2369 | |
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2370 #endif // PRODUCT |
0 | 2371 |
2372 // Printing operations | |
2373 | |
2374 void nmethod::print() const { | |
2375 ResourceMark rm; | |
2376 ttyLocker ttyl; // keep the following output all in one block | |
2377 | |
2378 tty->print("Compiled "); | |
2379 | |
2380 if (is_compiled_by_c1()) { | |
2381 tty->print("(c1) "); | |
2382 } else if (is_compiled_by_c2()) { | |
2383 tty->print("(c2) "); | |
1692 | 2384 } else if (is_compiled_by_shark()) { |
2385 tty->print("(shark) "); | |
0 | 2386 } else { |
2387 tty->print("(nm) "); | |
2388 } | |
2389 | |
2390 print_on(tty, "nmethod"); | |
2391 tty->cr(); | |
2392 if (WizardMode) { | |
2393 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2394 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2395 tty->print(" { "); | |
2396 if (is_in_use()) tty->print("in_use "); | |
2397 if (is_not_entrant()) tty->print("not_entrant "); | |
2398 if (is_zombie()) tty->print("zombie "); | |
2399 if (is_unloaded()) tty->print("unloaded "); | |
989
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2400 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2401 tty->print_cr("}:"); |
2402 } | |
2403 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2404 (address)this, | |
2405 (address)this + size(), | |
2406 size()); | |
2407 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2408 relocation_begin(), | |
2409 relocation_end(), | |
2410 relocation_size()); | |
1762
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2411 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2412 consts_begin(), |
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|
2413 consts_end(), |
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|
2414 consts_size()); |
1748 | 2415 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2416 insts_begin(), | |
2417 insts_end(), | |
2418 insts_size()); | |
0 | 2419 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2420 stub_begin(), | |
2421 stub_end(), | |
2422 stub_size()); | |
1563
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2423 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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2424 oops_begin(), |
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2425 oops_end(), |
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|
2426 oops_size()); |
0 | 2427 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2428 scopes_data_begin(), | |
2429 scopes_data_end(), | |
2430 scopes_data_size()); | |
2431 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2432 scopes_pcs_begin(), | |
2433 scopes_pcs_end(), | |
2434 scopes_pcs_size()); | |
2435 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2436 dependencies_begin(), | |
2437 dependencies_end(), | |
2438 dependencies_size()); | |
2439 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2440 handler_table_begin(), | |
2441 handler_table_end(), | |
2442 handler_table_size()); | |
2443 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2444 nul_chk_table_begin(), | |
2445 nul_chk_table_end(), | |
2446 nul_chk_table_size()); | |
2447 } | |
2448 | |
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2449 void nmethod::print_code() { |
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|
2450 HandleMark hm; |
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|
2451 ResourceMark m; |
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|
2452 Disassembler::decode(this); |
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|
2453 } |
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|
2454 |
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|
2455 |
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|
2456 #ifndef PRODUCT |
0 | 2457 |
2458 void nmethod::print_scopes() { | |
2459 // Find the first pc desc for all scopes in the code and print it. | |
2460 ResourceMark rm; | |
2461 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2462 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2463 continue; | |
2464 | |
2465 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2466 sd->print_on(tty, p); | |
2467 } | |
2468 } | |
2469 | |
2470 void nmethod::print_dependencies() { | |
2471 ResourceMark rm; | |
2472 ttyLocker ttyl; // keep the following output all in one block | |
2473 tty->print_cr("Dependencies:"); | |
2474 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2475 deps.print_dependency(); | |
2476 klassOop ctxk = deps.context_type(); | |
2477 if (ctxk != NULL) { | |
2478 Klass* k = Klass::cast(ctxk); | |
2479 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2480 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2481 } |
2482 } | |
2483 deps.log_dependency(); // put it into the xml log also | |
2484 } | |
2485 } | |
2486 | |
2487 | |
2488 void nmethod::print_relocations() { | |
2489 ResourceMark m; // in case methods get printed via the debugger | |
2490 tty->print_cr("relocations:"); | |
2491 RelocIterator iter(this); | |
2492 iter.print(); | |
2493 if (UseRelocIndex) { | |
2494 jint* index_end = (jint*)relocation_end() - 1; | |
2495 jint index_size = *index_end; | |
2496 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2497 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2498 if (index_size > 0) { | |
2499 jint* ip; | |
2500 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2501 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2502 ip[0], | |
2503 ip[1], | |
2504 header_end()+ip[0], | |
2505 relocation_begin()-1+ip[1]); | |
2506 for (; ip < index_end; ip++) | |
2507 tty->print_cr(" (%d ?)", ip[0]); | |
2508 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2509 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2510 } | |
2511 } | |
2512 } | |
2513 | |
2514 | |
2515 void nmethod::print_pcs() { | |
2516 ResourceMark m; // in case methods get printed via debugger | |
2517 tty->print_cr("pc-bytecode offsets:"); | |
2518 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2519 p->print(this); | |
2520 } | |
2521 } | |
2522 | |
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2523 #endif // PRODUCT |
0 | 2524 |
2525 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2526 RelocIterator iter(this, begin, end); | |
2527 bool have_one = false; | |
2528 while (iter.next()) { | |
2529 have_one = true; | |
2530 switch (iter.type()) { | |
2531 case relocInfo::none: return "no_reloc"; | |
2532 case relocInfo::oop_type: { | |
2533 stringStream st; | |
2534 oop_Relocation* r = iter.oop_reloc(); | |
2535 oop obj = r->oop_value(); | |
2536 st.print("oop("); | |
2537 if (obj == NULL) st.print("NULL"); | |
2538 else obj->print_value_on(&st); | |
2539 st.print(")"); | |
2540 return st.as_string(); | |
2541 } | |
2542 case relocInfo::virtual_call_type: return "virtual_call"; | |
2543 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2544 case relocInfo::static_call_type: return "static_call"; | |
2545 case relocInfo::static_stub_type: return "static_stub"; | |
2546 case relocInfo::runtime_call_type: return "runtime_call"; | |
2547 case relocInfo::external_word_type: return "external_word"; | |
2548 case relocInfo::internal_word_type: return "internal_word"; | |
2549 case relocInfo::section_word_type: return "section_word"; | |
2550 case relocInfo::poll_type: return "poll"; | |
2551 case relocInfo::poll_return_type: return "poll_return"; | |
2552 case relocInfo::type_mask: return "type_bit_mask"; | |
2553 } | |
2554 } | |
2555 return have_one ? "other" : NULL; | |
2556 } | |
2557 | |
2558 // Return a the last scope in (begin..end] | |
2559 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2560 PcDesc* p = pc_desc_near(begin+1); | |
2561 if (p != NULL && p->real_pc(this) <= end) { | |
2562 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
|
2563 p->obj_decode_offset(), p->should_reexecute(), |
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2564 p->return_oop()); |
0 | 2565 } |
2566 return NULL; | |
2567 } | |
2568 | |
1155
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|
2569 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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|
2570 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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|
2571 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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|
2572 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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diff
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|
2573 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2574 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2575 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
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|
2576 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
|
2577 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
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|
2578 |
1155
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|
2579 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
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|
2580 |
1155
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|
2581 if (block_begin == entry_point()) { |
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|
2582 methodHandle m = method(); |
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|
2583 if (m.not_null()) { |
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|
2584 stream->print(" # "); |
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|
2585 m->print_value_on(stream); |
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|
2586 stream->cr(); |
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|
2587 } |
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|
2588 if (m.not_null() && !is_osr_method()) { |
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|
2589 ResourceMark rm; |
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|
2590 int sizeargs = m->size_of_parameters(); |
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|
2591 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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|
2592 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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|
2593 { |
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|
2594 int sig_index = 0; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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|
2595 if (!m->is_static()) |
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|
2596 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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|
2597 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
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changeset
|
2598 BasicType t = ss.type(); |
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|
2599 sig_bt[sig_index++] = t; |
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|
2600 if (type2size[t] == 2) { |
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|
2601 sig_bt[sig_index++] = T_VOID; |
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|
2602 } else { |
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|
2603 assert(type2size[t] == 1, "size is 1 or 2"); |
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|
2604 } |
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|
2605 } |
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|
2606 assert(sig_index == sizeargs, ""); |
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|
2607 } |
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|
2608 const char* spname = "sp"; // make arch-specific? |
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changeset
|
2609 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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|
2610 int stack_slot_offset = this->frame_size() * wordSize; |
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|
2611 int tab1 = 14, tab2 = 24; |
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diff
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|
2612 int sig_index = 0; |
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|
2613 int arg_index = (m->is_static() ? 0 : -1); |
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|
2614 bool did_old_sp = false; |
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changeset
|
2615 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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2616 bool at_this = (arg_index == -1); |
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2617 bool at_old_sp = false; |
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2618 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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2619 assert(t == sig_bt[sig_index], "sigs in sync"); |
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|
2620 if (at_this) |
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2621 stream->print(" # this: "); |
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|
2622 else |
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|
2623 stream->print(" # parm%d: ", arg_index); |
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2624 stream->move_to(tab1); |
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2625 VMReg fst = regs[sig_index].first(); |
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|
2626 VMReg snd = regs[sig_index].second(); |
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2627 if (fst->is_reg()) { |
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|
2628 stream->print("%s", fst->name()); |
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|
2629 if (snd->is_valid()) { |
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2630 stream->print(":%s", snd->name()); |
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|
2631 } |
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2632 } else if (fst->is_stack()) { |
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2633 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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2634 if (offset == stack_slot_offset) at_old_sp = true; |
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2635 stream->print("[%s+0x%x]", spname, offset); |
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|
2636 } else { |
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2637 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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|
2638 } |
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|
2639 stream->print(" "); |
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|
2640 stream->move_to(tab2); |
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|
2641 stream->print("= "); |
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|
2642 if (at_this) { |
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2643 m->method_holder()->print_value_on(stream); |
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|
2644 } else { |
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|
2645 bool did_name = false; |
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|
2646 if (!at_this && ss.is_object()) { |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2142
diff
changeset
|
2647 Symbol* name = ss.as_symbol_or_null(); |
1155
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diff
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2648 if (name != NULL) { |
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diff
changeset
|
2649 name->print_value_on(stream); |
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diff
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|
2650 did_name = true; |
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|
2651 } |
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diff
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|
2652 } |
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diff
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|
2653 if (!did_name) |
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diff
changeset
|
2654 stream->print("%s", type2name(t)); |
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diff
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|
2655 } |
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diff
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|
2656 if (at_old_sp) { |
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diff
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|
2657 stream->print(" (%s of caller)", spname); |
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diff
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|
2658 did_old_sp = true; |
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diff
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|
2659 } |
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|
2660 stream->cr(); |
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diff
changeset
|
2661 sig_index += type2size[t]; |
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diff
changeset
|
2662 arg_index += 1; |
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diff
changeset
|
2663 if (!at_this) ss.next(); |
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diff
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|
2664 } |
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diff
changeset
|
2665 if (!did_old_sp) { |
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diff
changeset
|
2666 stream->print(" # "); |
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diff
changeset
|
2667 stream->move_to(tab1); |
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diff
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|
2668 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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diff
changeset
|
2669 stream->print(" (%s of caller)", spname); |
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diff
changeset
|
2670 stream->cr(); |
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diff
changeset
|
2671 } |
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diff
changeset
|
2672 } |
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diff
changeset
|
2673 } |
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diff
changeset
|
2674 } |
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diff
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|
2675 |
0 | 2676 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2677 // First, find an oopmap in (begin, end]. | |
2678 // We use the odd half-closed interval so that oop maps and scope descs | |
2679 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2680 address base = code_begin(); |
0 | 2681 OopMapSet* oms = oop_maps(); |
2682 if (oms != NULL) { | |
2683 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2684 OopMap* om = oms->at(i); | |
2685 address pc = base + om->offset(); | |
2686 if (pc > begin) { | |
2687 if (pc <= end) { | |
100
c7c777385a15
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30
diff
changeset
|
2688 st->move_to(column); |
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30
diff
changeset
|
2689 st->print("; "); |
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30
diff
changeset
|
2690 om->print_on(st); |
0 | 2691 } |
2692 break; | |
2693 } | |
2694 } | |
2695 } | |
100
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diff
changeset
|
2696 |
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diff
changeset
|
2697 // Print any debug info present at this pc. |
0 | 2698 ScopeDesc* sd = scope_desc_in(begin, end); |
2699 if (sd != NULL) { | |
100
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diff
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|
2700 st->move_to(column); |
0 | 2701 if (sd->bci() == SynchronizationEntryBCI) { |
2702 st->print(";*synchronization entry"); | |
2703 } else { | |
2704 if (sd->method().is_null()) { | |
100
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diff
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|
2705 st->print("method is NULL"); |
0 | 2706 } else if (sd->method()->is_native()) { |
100
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diff
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|
2707 st->print("method is native"); |
0 | 2708 } else { |
2142 | 2709 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2710 st->print(";*%s", Bytecodes::name(bc)); |
2711 switch (bc) { | |
2712 case Bytecodes::_invokevirtual: | |
2713 case Bytecodes::_invokespecial: | |
2714 case Bytecodes::_invokestatic: | |
2715 case Bytecodes::_invokeinterface: | |
2716 { | |
2142 | 2717 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2718 st->print(" "); |
2142 | 2719 if (invoke.name() != NULL) |
2720 invoke.name()->print_symbol_on(st); | |
0 | 2721 else |
2722 st->print("<UNKNOWN>"); | |
2723 break; | |
2724 } | |
2725 case Bytecodes::_getfield: | |
2726 case Bytecodes::_putfield: | |
2727 case Bytecodes::_getstatic: | |
2728 case Bytecodes::_putstatic: | |
2729 { | |
2142 | 2730 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2731 st->print(" "); |
2142 | 2732 if (field.name() != NULL) |
2733 field.name()->print_symbol_on(st); | |
0 | 2734 else |
2735 st->print("<UNKNOWN>"); | |
2736 } | |
2737 } | |
2738 } | |
2739 } | |
100
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diff
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|
2740 |
0 | 2741 // Print all scopes |
2742 for (;sd != NULL; sd = sd->sender()) { | |
100
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diff
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|
2743 st->move_to(column); |
0 | 2744 st->print("; -"); |
2745 if (sd->method().is_null()) { | |
100
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diff
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|
2746 st->print("method is NULL"); |
0 | 2747 } else { |
2748 sd->method()->print_short_name(st); | |
2749 } | |
2750 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2751 if (lineno != -1) { | |
2752 st->print("@%d (line %d)", sd->bci(), lineno); | |
2753 } else { | |
2754 st->print("@%d", sd->bci()); | |
2755 } | |
2756 st->cr(); | |
2757 } | |
2758 } | |
2759 | |
2760 // Print relocation information | |
2761 const char* str = reloc_string_for(begin, end); | |
2762 if (str != NULL) { | |
2763 if (sd != NULL) st->cr(); | |
100
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diff
changeset
|
2764 st->move_to(column); |
0 | 2765 st->print("; {%s}", str); |
2766 } | |
1748 | 2767 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2768 if (cont_offset != 0) { |
100
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diff
changeset
|
2769 st->move_to(column); |
1748 | 2770 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2771 } |
2772 | |
2773 } | |
2774 | |
100
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diff
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|
2775 #ifndef PRODUCT |
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diff
changeset
|
2776 |
0 | 2777 void nmethod::print_value_on(outputStream* st) const { |
2778 print_on(st, "nmethod"); | |
2779 } | |
2780 | |
2781 void nmethod::print_calls(outputStream* st) { | |
2782 RelocIterator iter(this); | |
2783 while (iter.next()) { | |
2784 switch (iter.type()) { | |
2785 case relocInfo::virtual_call_type: | |
2786 case relocInfo::opt_virtual_call_type: { | |
2787 VerifyMutexLocker mc(CompiledIC_lock); | |
2788 CompiledIC_at(iter.reloc())->print(); | |
2789 break; | |
2790 } | |
2791 case relocInfo::static_call_type: | |
2792 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2793 compiledStaticCall_at(iter.reloc())->print(); | |
2794 break; | |
2795 } | |
2796 } | |
2797 } | |
2798 | |
2799 void nmethod::print_handler_table() { | |
2800 ExceptionHandlerTable(this).print(); | |
2801 } | |
2802 | |
2803 void nmethod::print_nul_chk_table() { | |
1748 | 2804 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2805 } |
2806 | |
2807 void nmethod::print_statistics() { | |
2808 ttyLocker ttyl; | |
2809 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2810 nmethod_stats.print_native_nmethod_stats(); | |
2811 nmethod_stats.print_nmethod_stats(); | |
2812 DebugInformationRecorder::print_statistics(); | |
2813 nmethod_stats.print_pc_stats(); | |
2814 Dependencies::print_statistics(); | |
2815 if (xtty != NULL) xtty->tail("statistics"); | |
2816 } | |
2817 | |
2818 #endif // PRODUCT |