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annotate src/share/vm/runtime/frame.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
author | trims |
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date | Thu, 27 May 2010 19:08:38 -0700 |
parents | df736661d0c8 |
children | 126ea7725993 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_frame.cpp.incl" | |
27 | |
28 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) { | |
29 _thread = thread; | |
30 _update_map = update_map; | |
31 clear(); | |
32 debug_only(_update_for_id = NULL;) | |
33 #ifndef PRODUCT | |
34 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL; | |
35 #endif /* PRODUCT */ | |
36 } | |
37 | |
38 RegisterMap::RegisterMap(const RegisterMap* map) { | |
39 assert(map != this, "bad initialization parameter"); | |
40 assert(map != NULL, "RegisterMap must be present"); | |
41 _thread = map->thread(); | |
42 _update_map = map->update_map(); | |
43 _include_argument_oops = map->include_argument_oops(); | |
44 debug_only(_update_for_id = map->_update_for_id;) | |
45 pd_initialize_from(map); | |
46 if (update_map()) { | |
47 for(int i = 0; i < location_valid_size; i++) { | |
48 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i]; | |
49 _location_valid[i] = bits; | |
50 // for whichever bits are set, pull in the corresponding map->_location | |
51 int j = i*location_valid_type_size; | |
52 while (bits != 0) { | |
53 if ((bits & 1) != 0) { | |
54 assert(0 <= j && j < reg_count, "range check"); | |
55 _location[j] = map->_location[j]; | |
56 } | |
57 bits >>= 1; | |
58 j += 1; | |
59 } | |
60 } | |
61 } | |
62 } | |
63 | |
64 void RegisterMap::clear() { | |
65 set_include_argument_oops(true); | |
66 if (_update_map) { | |
67 for(int i = 0; i < location_valid_size; i++) { | |
68 _location_valid[i] = 0; | |
69 } | |
70 pd_clear(); | |
71 } else { | |
72 pd_initialize(); | |
73 } | |
74 } | |
75 | |
76 #ifndef PRODUCT | |
77 | |
78 void RegisterMap::print_on(outputStream* st) const { | |
79 st->print_cr("Register map"); | |
80 for(int i = 0; i < reg_count; i++) { | |
81 | |
82 VMReg r = VMRegImpl::as_VMReg(i); | |
83 intptr_t* src = (intptr_t*) location(r); | |
84 if (src != NULL) { | |
85 | |
417 | 86 r->print_on(st); |
87 st->print(" [" INTPTR_FORMAT "] = ", src); | |
0 | 88 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) { |
417 | 89 st->print_cr("<misaligned>"); |
0 | 90 } else { |
417 | 91 st->print_cr(INTPTR_FORMAT, *src); |
0 | 92 } |
93 } | |
94 } | |
95 } | |
96 | |
97 void RegisterMap::print() const { | |
98 print_on(tty); | |
99 } | |
100 | |
101 #endif | |
102 // This returns the pc that if you were in the debugger you'd see. Not | |
103 // the idealized value in the frame object. This undoes the magic conversion | |
104 // that happens for deoptimized frames. In addition it makes the value the | |
105 // hardware would want to see in the native frame. The only user (at this point) | |
106 // is deoptimization. It likely no one else should ever use it. | |
107 | |
108 address frame::raw_pc() const { | |
109 if (is_deoptimized_frame()) { | |
1204 | 110 nmethod* nm = cb()->as_nmethod_or_null(); |
111 if (nm->is_method_handle_return(pc())) | |
112 return nm->deopt_mh_handler_begin() - pc_return_offset; | |
113 else | |
114 return nm->deopt_handler_begin() - pc_return_offset; | |
0 | 115 } else { |
116 return (pc() - pc_return_offset); | |
117 } | |
118 } | |
119 | |
120 // Change the pc in a frame object. This does not change the actual pc in | |
121 // actual frame. To do that use patch_pc. | |
122 // | |
123 void frame::set_pc(address newpc ) { | |
124 #ifdef ASSERT | |
125 if (_cb != NULL && _cb->is_nmethod()) { | |
126 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation"); | |
127 } | |
128 #endif // ASSERT | |
129 | |
130 // Unsafe to use the is_deoptimzed tester after changing pc | |
131 _deopt_state = unknown; | |
132 _pc = newpc; | |
133 _cb = CodeCache::find_blob_unsafe(_pc); | |
134 | |
135 } | |
136 | |
137 // type testers | |
138 bool frame::is_deoptimized_frame() const { | |
139 assert(_deopt_state != unknown, "not answerable"); | |
140 return _deopt_state == is_deoptimized; | |
141 } | |
142 | |
143 bool frame::is_native_frame() const { | |
144 return (_cb != NULL && | |
145 _cb->is_nmethod() && | |
146 ((nmethod*)_cb)->is_native_method()); | |
147 } | |
148 | |
149 bool frame::is_java_frame() const { | |
150 if (is_interpreted_frame()) return true; | |
151 if (is_compiled_frame()) return true; | |
152 return false; | |
153 } | |
154 | |
155 | |
156 bool frame::is_compiled_frame() const { | |
157 if (_cb != NULL && | |
158 _cb->is_nmethod() && | |
159 ((nmethod*)_cb)->is_java_method()) { | |
160 return true; | |
161 } | |
162 return false; | |
163 } | |
164 | |
165 | |
166 bool frame::is_runtime_frame() const { | |
167 return (_cb != NULL && _cb->is_runtime_stub()); | |
168 } | |
169 | |
170 bool frame::is_safepoint_blob_frame() const { | |
171 return (_cb != NULL && _cb->is_safepoint_stub()); | |
172 } | |
173 | |
174 // testers | |
175 | |
176 bool frame::is_first_java_frame() const { | |
177 RegisterMap map(JavaThread::current(), false); // No update | |
178 frame s; | |
179 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)); | |
180 return s.is_first_frame(); | |
181 } | |
182 | |
183 | |
184 bool frame::entry_frame_is_first() const { | |
185 return entry_frame_call_wrapper()->anchor()->last_Java_sp() == NULL; | |
186 } | |
187 | |
188 | |
189 bool frame::should_be_deoptimized() const { | |
190 if (_deopt_state == is_deoptimized || | |
191 !is_compiled_frame() ) return false; | |
192 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod"); | |
193 nmethod* nm = (nmethod *)_cb; | |
194 if (TraceDependencies) { | |
195 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false"); | |
196 nm->print_value_on(tty); | |
197 tty->cr(); | |
198 } | |
199 | |
200 if( !nm->is_marked_for_deoptimization() ) | |
201 return false; | |
202 | |
203 // If at the return point, then the frame has already been popped, and | |
204 // only the return needs to be executed. Don't deoptimize here. | |
205 return !nm->is_at_poll_return(pc()); | |
206 } | |
207 | |
208 bool frame::can_be_deoptimized() const { | |
209 if (!is_compiled_frame()) return false; | |
210 nmethod* nm = (nmethod*)_cb; | |
211 | |
212 if( !nm->can_be_deoptimized() ) | |
213 return false; | |
214 | |
215 return !nm->is_at_poll_return(pc()); | |
216 } | |
217 | |
218 void frame::deoptimize(JavaThread* thread, bool thread_is_known_safe) { | |
219 // Schedule deoptimization of an nmethod activation with this frame. | |
220 | |
221 // Store the original pc before an patch (or request to self-deopt) | |
222 // in the published location of the frame. | |
223 | |
224 assert(_cb != NULL && _cb->is_nmethod(), "must be"); | |
225 nmethod* nm = (nmethod*)_cb; | |
226 | |
227 // This is a fix for register window patching race | |
228 if (NeedsDeoptSuspend && !thread_is_known_safe) { | |
229 | |
230 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that | |
231 // we could see the frame again and ask for it to be deoptimized since | |
232 // it might move for a long time. That is harmless and we just ignore it. | |
233 if (id() == thread->must_deopt_id()) { | |
234 assert(thread->is_deopt_suspend(), "lost suspension"); | |
235 return; | |
236 } | |
237 | |
238 // We are at a safepoint so the target thread can only be | |
239 // in 4 states: | |
240 // blocked - no problem | |
241 // blocked_trans - no problem (i.e. could have woken up from blocked | |
242 // during a safepoint). | |
243 // native - register window pc patching race | |
244 // native_trans - momentary state | |
245 // | |
246 // We could just wait out a thread in native_trans to block. | |
247 // Then we'd have all the issues that the safepoint code has as to | |
248 // whether to spin or block. It isn't worth it. Just treat it like | |
249 // native and be done with it. | |
250 // | |
251 JavaThreadState state = thread->thread_state(); | |
252 if (state == _thread_in_native || state == _thread_in_native_trans) { | |
253 // Since we are at a safepoint the target thread will stop itself | |
254 // before it can return to java as long as we remain at the safepoint. | |
255 // Therefore we can put an additional request for the thread to stop | |
256 // no matter what no (like a suspend). This will cause the thread | |
257 // to notice it needs to do the deopt on its own once it leaves native. | |
258 // | |
259 // The only reason we must do this is because on machine with register | |
260 // windows we have a race with patching the return address and the | |
261 // window coming live as the thread returns to the Java code (but still | |
262 // in native mode) and then blocks. It is only this top most frame | |
263 // that is at risk. So in truth we could add an additional check to | |
264 // see if this frame is one that is at risk. | |
265 RegisterMap map(thread, false); | |
266 frame at_risk = thread->last_frame().sender(&map); | |
267 if (id() == at_risk.id()) { | |
268 thread->set_must_deopt_id(id()); | |
269 thread->set_deopt_suspend(); | |
270 return; | |
271 } | |
272 } | |
273 } // NeedsDeoptSuspend | |
274 | |
275 | |
1204 | 276 // If the call site is a MethodHandle call site use the MH deopt |
277 // handler. | |
278 address deopt = nm->is_method_handle_return(pc()) ? | |
279 nm->deopt_mh_handler_begin() : | |
280 nm->deopt_handler_begin(); | |
281 | |
0 | 282 // Save the original pc before we patch in the new one |
283 nm->set_original_pc(this, pc()); | |
284 patch_pc(thread, deopt); | |
1204 | 285 |
0 | 286 #ifdef ASSERT |
287 { | |
288 RegisterMap map(thread, false); | |
289 frame check = thread->last_frame(); | |
290 while (id() != check.id()) { | |
291 check = check.sender(&map); | |
292 } | |
293 assert(check.is_deoptimized_frame(), "missed deopt"); | |
294 } | |
295 #endif // ASSERT | |
296 } | |
297 | |
298 frame frame::java_sender() const { | |
299 RegisterMap map(JavaThread::current(), false); | |
300 frame s; | |
301 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ; | |
302 guarantee(s.is_java_frame(), "tried to get caller of first java frame"); | |
303 return s; | |
304 } | |
305 | |
306 frame frame::real_sender(RegisterMap* map) const { | |
307 frame result = sender(map); | |
308 while (result.is_runtime_frame()) { | |
309 result = result.sender(map); | |
310 } | |
311 return result; | |
312 } | |
313 | |
314 // Note: called by profiler - NOT for current thread | |
315 frame frame::profile_find_Java_sender_frame(JavaThread *thread) { | |
316 // If we don't recognize this frame, walk back up the stack until we do | |
317 RegisterMap map(thread, false); | |
318 frame first_java_frame = frame(); | |
319 | |
320 // Find the first Java frame on the stack starting with input frame | |
321 if (is_java_frame()) { | |
322 // top frame is compiled frame or deoptimized frame | |
323 first_java_frame = *this; | |
324 } else if (safe_for_sender(thread)) { | |
325 for (frame sender_frame = sender(&map); | |
326 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame(); | |
327 sender_frame = sender_frame.sender(&map)) { | |
328 if (sender_frame.is_java_frame()) { | |
329 first_java_frame = sender_frame; | |
330 break; | |
331 } | |
332 } | |
333 } | |
334 return first_java_frame; | |
335 } | |
336 | |
337 // Interpreter frames | |
338 | |
339 | |
340 void frame::interpreter_frame_set_locals(intptr_t* locs) { | |
341 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
342 *interpreter_frame_locals_addr() = locs; | |
343 } | |
344 | |
345 methodOop frame::interpreter_frame_method() const { | |
346 assert(is_interpreted_frame(), "interpreted frame expected"); | |
347 methodOop m = *interpreter_frame_method_addr(); | |
348 assert(m->is_perm(), "bad methodOop in interpreter frame"); | |
349 assert(m->is_method(), "not a methodOop"); | |
350 return m; | |
351 } | |
352 | |
353 void frame::interpreter_frame_set_method(methodOop method) { | |
354 assert(is_interpreted_frame(), "interpreted frame expected"); | |
355 *interpreter_frame_method_addr() = method; | |
356 } | |
357 | |
358 void frame::interpreter_frame_set_bcx(intptr_t bcx) { | |
359 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
360 if (ProfileInterpreter) { | |
361 bool formerly_bci = is_bci(interpreter_frame_bcx()); | |
362 bool is_now_bci = is_bci(bcx); | |
363 *interpreter_frame_bcx_addr() = bcx; | |
364 | |
365 intptr_t mdx = interpreter_frame_mdx(); | |
366 | |
367 if (mdx != 0) { | |
368 if (formerly_bci) { | |
369 if (!is_now_bci) { | |
370 // The bcx was just converted from bci to bcp. | |
371 // Convert the mdx in parallel. | |
372 methodDataOop mdo = interpreter_frame_method()->method_data(); | |
373 assert(mdo != NULL, ""); | |
374 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one. | |
375 address mdp = mdo->di_to_dp(mdi); | |
376 interpreter_frame_set_mdx((intptr_t)mdp); | |
377 } | |
378 } else { | |
379 if (is_now_bci) { | |
380 // The bcx was just converted from bcp to bci. | |
381 // Convert the mdx in parallel. | |
382 methodDataOop mdo = interpreter_frame_method()->method_data(); | |
383 assert(mdo != NULL, ""); | |
384 int mdi = mdo->dp_to_di((address)mdx); | |
385 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0. | |
386 } | |
387 } | |
388 } | |
389 } else { | |
390 *interpreter_frame_bcx_addr() = bcx; | |
391 } | |
392 } | |
393 | |
394 jint frame::interpreter_frame_bci() const { | |
395 assert(is_interpreted_frame(), "interpreted frame expected"); | |
396 intptr_t bcx = interpreter_frame_bcx(); | |
397 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx); | |
398 } | |
399 | |
400 void frame::interpreter_frame_set_bci(jint bci) { | |
401 assert(is_interpreted_frame(), "interpreted frame expected"); | |
402 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC"); | |
403 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci)); | |
404 } | |
405 | |
406 address frame::interpreter_frame_bcp() const { | |
407 assert(is_interpreted_frame(), "interpreted frame expected"); | |
408 intptr_t bcx = interpreter_frame_bcx(); | |
409 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx; | |
410 } | |
411 | |
412 void frame::interpreter_frame_set_bcp(address bcp) { | |
413 assert(is_interpreted_frame(), "interpreted frame expected"); | |
414 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC"); | |
415 interpreter_frame_set_bcx((intptr_t)bcp); | |
416 } | |
417 | |
418 void frame::interpreter_frame_set_mdx(intptr_t mdx) { | |
419 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
420 assert(ProfileInterpreter, "must be profiling interpreter"); | |
421 *interpreter_frame_mdx_addr() = mdx; | |
422 } | |
423 | |
424 address frame::interpreter_frame_mdp() const { | |
425 assert(ProfileInterpreter, "must be profiling interpreter"); | |
426 assert(is_interpreted_frame(), "interpreted frame expected"); | |
427 intptr_t bcx = interpreter_frame_bcx(); | |
428 intptr_t mdx = interpreter_frame_mdx(); | |
429 | |
430 assert(!is_bci(bcx), "should not access mdp during GC"); | |
431 return (address)mdx; | |
432 } | |
433 | |
434 void frame::interpreter_frame_set_mdp(address mdp) { | |
435 assert(is_interpreted_frame(), "interpreted frame expected"); | |
436 if (mdp == NULL) { | |
437 // Always allow the mdp to be cleared. | |
438 interpreter_frame_set_mdx((intptr_t)mdp); | |
439 } | |
440 intptr_t bcx = interpreter_frame_bcx(); | |
441 assert(!is_bci(bcx), "should not set mdp during GC"); | |
442 interpreter_frame_set_mdx((intptr_t)mdp); | |
443 } | |
444 | |
445 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const { | |
446 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
447 #ifdef ASSERT | |
448 interpreter_frame_verify_monitor(current); | |
449 #endif | |
450 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size()); | |
451 return next; | |
452 } | |
453 | |
454 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const { | |
455 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
456 #ifdef ASSERT | |
457 // // This verification needs to be checked before being enabled | |
458 // interpreter_frame_verify_monitor(current); | |
459 #endif | |
460 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size()); | |
461 return previous; | |
462 } | |
463 | |
464 // Interpreter locals and expression stack locations. | |
465 | |
466 intptr_t* frame::interpreter_frame_local_at(int index) const { | |
467 const int n = Interpreter::local_offset_in_bytes(index)/wordSize; | |
468 return &((*interpreter_frame_locals_addr())[n]); | |
469 } | |
470 | |
471 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const { | |
472 const int i = offset * interpreter_frame_expression_stack_direction(); | |
1506 | 473 const int n = i * Interpreter::stackElementWords; |
0 | 474 return &(interpreter_frame_expression_stack()[n]); |
475 } | |
476 | |
477 jint frame::interpreter_frame_expression_stack_size() const { | |
478 // Number of elements on the interpreter expression stack | |
479 // Callers should span by stackElementWords | |
1506 | 480 int element_size = Interpreter::stackElementWords; |
0 | 481 if (frame::interpreter_frame_expression_stack_direction() < 0) { |
482 return (interpreter_frame_expression_stack() - | |
483 interpreter_frame_tos_address() + 1)/element_size; | |
484 } else { | |
485 return (interpreter_frame_tos_address() - | |
486 interpreter_frame_expression_stack() + 1)/element_size; | |
487 } | |
488 } | |
489 | |
490 | |
491 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp) | |
492 | |
493 const char* frame::print_name() const { | |
494 if (is_native_frame()) return "Native"; | |
495 if (is_interpreted_frame()) return "Interpreted"; | |
496 if (is_compiled_frame()) { | |
497 if (is_deoptimized_frame()) return "Deoptimized"; | |
498 return "Compiled"; | |
499 } | |
500 if (sp() == NULL) return "Empty"; | |
501 return "C"; | |
502 } | |
503 | |
504 void frame::print_value_on(outputStream* st, JavaThread *thread) const { | |
505 NOT_PRODUCT(address begin = pc()-40;) | |
506 NOT_PRODUCT(address end = NULL;) | |
507 | |
508 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp()); | |
509 if (sp() != NULL) | |
510 st->print(", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), pc()); | |
511 | |
512 if (StubRoutines::contains(pc())) { | |
513 st->print_cr(")"); | |
514 st->print("("); | |
515 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); | |
516 st->print("~Stub::%s", desc->name()); | |
517 NOT_PRODUCT(begin = desc->begin(); end = desc->end();) | |
518 } else if (Interpreter::contains(pc())) { | |
519 st->print_cr(")"); | |
520 st->print("("); | |
521 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); | |
522 if (desc != NULL) { | |
523 st->print("~"); | |
524 desc->print(); | |
525 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();) | |
526 } else { | |
527 st->print("~interpreter"); | |
528 } | |
529 } | |
530 st->print_cr(")"); | |
531 | |
532 if (_cb != NULL) { | |
533 st->print(" "); | |
534 _cb->print_value_on(st); | |
535 st->cr(); | |
536 #ifndef PRODUCT | |
537 if (end == NULL) { | |
538 begin = _cb->instructions_begin(); | |
539 end = _cb->instructions_end(); | |
540 } | |
541 #endif | |
542 } | |
543 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);) | |
544 } | |
545 | |
546 | |
547 void frame::print_on(outputStream* st) const { | |
548 print_value_on(st,NULL); | |
549 if (is_interpreted_frame()) { | |
550 interpreter_frame_print_on(st); | |
551 } | |
552 } | |
553 | |
554 | |
555 void frame::interpreter_frame_print_on(outputStream* st) const { | |
556 #ifndef PRODUCT | |
557 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
558 jint i; | |
559 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) { | |
560 intptr_t x = *interpreter_frame_local_at(i); | |
561 st->print(" - local [" INTPTR_FORMAT "]", x); | |
562 st->fill_to(23); | |
563 st->print_cr("; #%d", i); | |
564 } | |
565 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) { | |
566 intptr_t x = *interpreter_frame_expression_stack_at(i); | |
567 st->print(" - stack [" INTPTR_FORMAT "]", x); | |
568 st->fill_to(23); | |
569 st->print_cr("; #%d", i); | |
570 } | |
571 // locks for synchronization | |
572 for (BasicObjectLock* current = interpreter_frame_monitor_end(); | |
573 current < interpreter_frame_monitor_begin(); | |
574 current = next_monitor_in_interpreter_frame(current)) { | |
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575 st->print(" - obj ["); |
0 | 576 current->obj()->print_value_on(st); |
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577 st->print_cr("]"); |
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578 st->print(" - lock ["); |
0 | 579 current->lock()->print_on(st); |
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580 st->print_cr("]"); |
0 | 581 } |
582 // monitor | |
583 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin()); | |
584 // bcp | |
585 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp()); | |
586 st->fill_to(23); | |
587 st->print_cr("; @%d", interpreter_frame_bci()); | |
588 // locals | |
589 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0)); | |
590 // method | |
591 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method()); | |
592 st->fill_to(23); | |
593 st->print("; "); | |
594 interpreter_frame_method()->print_name(st); | |
595 st->cr(); | |
596 #endif | |
597 } | |
598 | |
599 // Return whether the frame is in the VM or os indicating a Hotspot problem. | |
600 // Otherwise, it's likely a bug in the native library that the Java code calls, | |
601 // hopefully indicating where to submit bugs. | |
602 static void print_C_frame(outputStream* st, char* buf, int buflen, address pc) { | |
603 // C/C++ frame | |
604 bool in_vm = os::address_is_in_vm(pc); | |
605 st->print(in_vm ? "V" : "C"); | |
606 | |
607 int offset; | |
608 bool found; | |
609 | |
610 // libname | |
611 found = os::dll_address_to_library_name(pc, buf, buflen, &offset); | |
612 if (found) { | |
613 // skip directory names | |
614 const char *p1, *p2; | |
615 p1 = buf; | |
616 int len = (int)strlen(os::file_separator()); | |
617 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
618 st->print(" [%s+0x%x]", p1, offset); | |
619 } else { | |
620 st->print(" " PTR_FORMAT, pc); | |
621 } | |
622 | |
623 // function name - os::dll_address_to_function_name() may return confusing | |
624 // names if pc is within jvm.dll or libjvm.so, because JVM only has | |
625 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this | |
626 // only for native libraries. | |
627 if (!in_vm) { | |
628 found = os::dll_address_to_function_name(pc, buf, buflen, &offset); | |
629 | |
630 if (found) { | |
631 st->print(" %s+0x%x", buf, offset); | |
632 } | |
633 } | |
634 } | |
635 | |
636 // frame::print_on_error() is called by fatal error handler. Notice that we may | |
637 // crash inside this function if stack frame is corrupted. The fatal error | |
638 // handler can catch and handle the crash. Here we assume the frame is valid. | |
639 // | |
640 // First letter indicates type of the frame: | |
641 // J: Java frame (compiled) | |
642 // j: Java frame (interpreted) | |
643 // V: VM frame (C/C++) | |
644 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.) | |
645 // C: C/C++ frame | |
646 // | |
647 // We don't need detailed frame type as that in frame::print_name(). "C" | |
648 // suggests the problem is in user lib; everything else is likely a VM bug. | |
649 | |
650 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const { | |
651 if (_cb != NULL) { | |
652 if (Interpreter::contains(pc())) { | |
653 methodOop m = this->interpreter_frame_method(); | |
654 if (m != NULL) { | |
655 m->name_and_sig_as_C_string(buf, buflen); | |
656 st->print("j %s", buf); | |
657 st->print("+%d", this->interpreter_frame_bci()); | |
658 } else { | |
659 st->print("j " PTR_FORMAT, pc()); | |
660 } | |
661 } else if (StubRoutines::contains(pc())) { | |
662 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); | |
663 if (desc != NULL) { | |
664 st->print("v ~StubRoutines::%s", desc->name()); | |
665 } else { | |
666 st->print("v ~StubRoutines::" PTR_FORMAT, pc()); | |
667 } | |
668 } else if (_cb->is_buffer_blob()) { | |
669 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name()); | |
670 } else if (_cb->is_nmethod()) { | |
671 methodOop m = ((nmethod *)_cb)->method(); | |
672 if (m != NULL) { | |
673 m->name_and_sig_as_C_string(buf, buflen); | |
674 st->print("J %s", buf); | |
675 } else { | |
676 st->print("J " PTR_FORMAT, pc()); | |
677 } | |
678 } else if (_cb->is_runtime_stub()) { | |
679 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name()); | |
680 } else if (_cb->is_deoptimization_stub()) { | |
681 st->print("v ~DeoptimizationBlob"); | |
682 } else if (_cb->is_exception_stub()) { | |
683 st->print("v ~ExceptionBlob"); | |
684 } else if (_cb->is_safepoint_stub()) { | |
685 st->print("v ~SafepointBlob"); | |
686 } else { | |
687 st->print("v blob " PTR_FORMAT, pc()); | |
688 } | |
689 } else { | |
690 print_C_frame(st, buf, buflen, pc()); | |
691 } | |
692 } | |
693 | |
694 | |
695 /* | |
696 The interpreter_frame_expression_stack_at method in the case of SPARC needs the | |
697 max_stack value of the method in order to compute the expression stack address. | |
698 It uses the methodOop in order to get the max_stack value but during GC this | |
699 methodOop value saved on the frame is changed by reverse_and_push and hence cannot | |
700 be used. So we save the max_stack value in the FrameClosure object and pass it | |
701 down to the interpreter_frame_expression_stack_at method | |
702 */ | |
703 class InterpreterFrameClosure : public OffsetClosure { | |
704 private: | |
705 frame* _fr; | |
706 OopClosure* _f; | |
707 int _max_locals; | |
708 int _max_stack; | |
709 | |
710 public: | |
711 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack, | |
712 OopClosure* f) { | |
713 _fr = fr; | |
714 _max_locals = max_locals; | |
715 _max_stack = max_stack; | |
716 _f = f; | |
717 } | |
718 | |
719 void offset_do(int offset) { | |
720 oop* addr; | |
721 if (offset < _max_locals) { | |
722 addr = (oop*) _fr->interpreter_frame_local_at(offset); | |
723 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame"); | |
724 _f->do_oop(addr); | |
725 } else { | |
726 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals)); | |
727 // In case of exceptions, the expression stack is invalid and the esp will be reset to express | |
728 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). | |
729 bool in_stack; | |
730 if (frame::interpreter_frame_expression_stack_direction() > 0) { | |
731 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address(); | |
732 } else { | |
733 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address(); | |
734 } | |
735 if (in_stack) { | |
736 _f->do_oop(addr); | |
737 } | |
738 } | |
739 } | |
740 | |
741 int max_locals() { return _max_locals; } | |
742 frame* fr() { return _fr; } | |
743 }; | |
744 | |
745 | |
746 class InterpretedArgumentOopFinder: public SignatureInfo { | |
747 private: | |
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748 OopClosure* _f; // Closure to invoke |
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749 int _offset; // TOS-relative offset, decremented with each argument |
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750 bool _has_receiver; // true if the callee has a receiver |
0 | 751 frame* _fr; |
752 | |
753 void set(int size, BasicType type) { | |
754 _offset -= size; | |
755 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do(); | |
756 } | |
757 | |
758 void oop_offset_do() { | |
759 oop* addr; | |
760 addr = (oop*)_fr->interpreter_frame_tos_at(_offset); | |
761 _f->do_oop(addr); | |
762 } | |
763 | |
764 public: | |
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765 InterpretedArgumentOopFinder(symbolHandle signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) { |
0 | 766 // compute size of arguments |
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767 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); |
0 | 768 assert(!fr->is_interpreted_frame() || |
769 args_size <= fr->interpreter_frame_expression_stack_size(), | |
770 "args cannot be on stack anymore"); | |
771 // initialize InterpretedArgumentOopFinder | |
772 _f = f; | |
773 _fr = fr; | |
774 _offset = args_size; | |
775 } | |
776 | |
777 void oops_do() { | |
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778 if (_has_receiver) { |
0 | 779 --_offset; |
780 oop_offset_do(); | |
781 } | |
782 iterate_parameters(); | |
783 } | |
784 }; | |
785 | |
786 | |
787 // Entry frame has following form (n arguments) | |
788 // +-----------+ | |
789 // sp -> | last arg | | |
790 // +-----------+ | |
791 // : ::: : | |
792 // +-----------+ | |
793 // (sp+n)->| first arg| | |
794 // +-----------+ | |
795 | |
796 | |
797 | |
798 // visits and GC's all the arguments in entry frame | |
799 class EntryFrameOopFinder: public SignatureInfo { | |
800 private: | |
801 bool _is_static; | |
802 int _offset; | |
803 frame* _fr; | |
804 OopClosure* _f; | |
805 | |
806 void set(int size, BasicType type) { | |
807 assert (_offset >= 0, "illegal offset"); | |
808 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset); | |
809 _offset -= size; | |
810 } | |
811 | |
812 void oop_at_offset_do(int offset) { | |
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813 assert (offset >= 0, "illegal offset"); |
0 | 814 oop* addr = (oop*) _fr->entry_frame_argument_at(offset); |
815 _f->do_oop(addr); | |
816 } | |
817 | |
818 public: | |
819 EntryFrameOopFinder(frame* frame, symbolHandle signature, bool is_static) : SignatureInfo(signature) { | |
820 _f = NULL; // will be set later | |
821 _fr = frame; | |
822 _is_static = is_static; | |
823 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0 | |
824 } | |
825 | |
826 void arguments_do(OopClosure* f) { | |
827 _f = f; | |
828 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver | |
829 iterate_parameters(); | |
830 } | |
831 | |
832 }; | |
833 | |
834 oop* frame::interpreter_callee_receiver_addr(symbolHandle signature) { | |
835 ArgumentSizeComputer asc(signature); | |
836 int size = asc.size(); | |
837 return (oop *)interpreter_frame_tos_at(size); | |
838 } | |
839 | |
840 | |
841 void frame::oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache) { | |
842 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
843 assert(map != NULL, "map must be set"); | |
844 Thread *thread = Thread::current(); | |
845 methodHandle m (thread, interpreter_frame_method()); | |
846 jint bci = interpreter_frame_bci(); | |
847 | |
848 assert(Universe::heap()->is_in(m()), "must be valid oop"); | |
849 assert(m->is_method(), "checking frame value"); | |
850 assert((m->is_native() && bci == 0) || (!m->is_native() && bci >= 0 && bci < m->code_size()), "invalid bci value"); | |
851 | |
852 // Handle the monitor elements in the activation | |
853 for ( | |
854 BasicObjectLock* current = interpreter_frame_monitor_end(); | |
855 current < interpreter_frame_monitor_begin(); | |
856 current = next_monitor_in_interpreter_frame(current) | |
857 ) { | |
858 #ifdef ASSERT | |
859 interpreter_frame_verify_monitor(current); | |
860 #endif | |
861 current->oops_do(f); | |
862 } | |
863 | |
864 // process fixed part | |
865 f->do_oop((oop*)interpreter_frame_method_addr()); | |
866 f->do_oop((oop*)interpreter_frame_cache_addr()); | |
867 | |
868 // Hmm what about the mdp? | |
869 #ifdef CC_INTERP | |
870 // Interpreter frame in the midst of a call have a methodOop within the | |
871 // object. | |
872 interpreterState istate = get_interpreterState(); | |
873 if (istate->msg() == BytecodeInterpreter::call_method) { | |
874 f->do_oop((oop*)&istate->_result._to_call._callee); | |
875 } | |
876 | |
877 #endif /* CC_INTERP */ | |
878 | |
879 if (m->is_native()) { | |
880 #ifdef CC_INTERP | |
881 f->do_oop((oop*)&istate->_oop_temp); | |
882 #else | |
883 f->do_oop((oop*)( fp() + interpreter_frame_oop_temp_offset )); | |
884 #endif /* CC_INTERP */ | |
885 } | |
886 | |
887 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); | |
888 | |
889 symbolHandle signature; | |
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890 bool has_receiver = false; |
0 | 891 |
892 // Process a callee's arguments if we are at a call site | |
893 // (i.e., if we are at an invoke bytecode) | |
894 // This is used sometimes for calling into the VM, not for another | |
895 // interpreted or compiled frame. | |
896 if (!m->is_native()) { | |
897 Bytecode_invoke *call = Bytecode_invoke_at_check(m, bci); | |
898 if (call != NULL) { | |
899 signature = symbolHandle(thread, call->signature()); | |
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900 has_receiver = call->has_receiver(); |
0 | 901 if (map->include_argument_oops() && |
902 interpreter_frame_expression_stack_size() > 0) { | |
903 ResourceMark rm(thread); // is this right ??? | |
904 // we are at a call site & the expression stack is not empty | |
905 // => process callee's arguments | |
906 // | |
907 // Note: The expression stack can be empty if an exception | |
605 | 908 // occurred during method resolution/execution. In all |
0 | 909 // cases we empty the expression stack completely be- |
910 // fore handling the exception (the exception handling | |
911 // code in the interpreter calls a blocking runtime | |
912 // routine which can cause this code to be executed). | |
913 // (was bug gri 7/27/98) | |
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914 oops_interpreted_arguments_do(signature, has_receiver, f); |
0 | 915 } |
916 } | |
917 } | |
918 | |
1506 | 919 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f); |
920 | |
921 // process locals & expression stack | |
922 InterpreterOopMap mask; | |
923 if (query_oop_map_cache) { | |
924 m->mask_for(bci, &mask); | |
0 | 925 } else { |
1506 | 926 OopMapCache::compute_one_oop_map(m, bci, &mask); |
0 | 927 } |
1506 | 928 mask.iterate_oop(&blk); |
0 | 929 } |
930 | |
931 | |
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932 void frame::oops_interpreted_arguments_do(symbolHandle signature, bool has_receiver, OopClosure* f) { |
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933 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f); |
0 | 934 finder.oops_do(); |
935 } | |
936 | |
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937 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) { |
0 | 938 assert(_cb != NULL, "sanity check"); |
939 if (_cb->oop_maps() != NULL) { | |
940 OopMapSet::oops_do(this, reg_map, f); | |
941 | |
942 // Preserve potential arguments for a callee. We handle this by dispatching | |
943 // on the codeblob. For c2i, we do | |
944 if (reg_map->include_argument_oops()) { | |
945 _cb->preserve_callee_argument_oops(*this, reg_map, f); | |
946 } | |
947 } | |
948 // In cases where perm gen is collected, GC will want to mark | |
949 // oops referenced from nmethods active on thread stacks so as to | |
950 // prevent them from being collected. However, this visit should be | |
951 // restricted to certain phases of the collection only. The | |
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952 // closure decides how it wants nmethods to be traced. |
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953 if (cf != NULL) |
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954 cf->do_code_blob(_cb); |
0 | 955 } |
956 | |
957 class CompiledArgumentOopFinder: public SignatureInfo { | |
958 protected: | |
959 OopClosure* _f; | |
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960 int _offset; // the current offset, incremented with each argument |
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961 bool _has_receiver; // true if the callee has a receiver |
0 | 962 frame _fr; |
963 RegisterMap* _reg_map; | |
964 int _arg_size; | |
965 VMRegPair* _regs; // VMReg list of arguments | |
966 | |
967 void set(int size, BasicType type) { | |
968 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset(); | |
969 _offset += size; | |
970 } | |
971 | |
972 virtual void handle_oop_offset() { | |
973 // Extract low order register number from register array. | |
974 // In LP64-land, the high-order bits are valid but unhelpful. | |
975 VMReg reg = _regs[_offset].first(); | |
976 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map); | |
977 _f->do_oop(loc); | |
978 } | |
979 | |
980 public: | |
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981 CompiledArgumentOopFinder(symbolHandle signature, bool has_receiver, OopClosure* f, frame fr, const RegisterMap* reg_map) |
0 | 982 : SignatureInfo(signature) { |
983 | |
984 // initialize CompiledArgumentOopFinder | |
985 _f = f; | |
986 _offset = 0; | |
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987 _has_receiver = has_receiver; |
0 | 988 _fr = fr; |
989 _reg_map = (RegisterMap*)reg_map; | |
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990 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); |
0 | 991 |
992 int arg_size; | |
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993 _regs = SharedRuntime::find_callee_arguments(signature(), has_receiver, &arg_size); |
0 | 994 assert(arg_size == _arg_size, "wrong arg size"); |
995 } | |
996 | |
997 void oops_do() { | |
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998 if (_has_receiver) { |
0 | 999 handle_oop_offset(); |
1000 _offset++; | |
1001 } | |
1002 iterate_parameters(); | |
1003 } | |
1004 }; | |
1005 | |
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1006 void frame::oops_compiled_arguments_do(symbolHandle signature, bool has_receiver, const RegisterMap* reg_map, OopClosure* f) { |
0 | 1007 ResourceMark rm; |
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1008 CompiledArgumentOopFinder finder(signature, has_receiver, f, *this, reg_map); |
0 | 1009 finder.oops_do(); |
1010 } | |
1011 | |
1012 | |
1013 // Get receiver out of callers frame, i.e. find parameter 0 in callers | |
1014 // frame. Consult ADLC for where parameter 0 is to be found. Then | |
1015 // check local reg_map for it being a callee-save register or argument | |
1016 // register, both of which are saved in the local frame. If not found | |
1017 // there, it must be an in-stack argument of the caller. | |
1018 // Note: caller.sp() points to callee-arguments | |
1019 oop frame::retrieve_receiver(RegisterMap* reg_map) { | |
1020 frame caller = *this; | |
1021 | |
1022 // First consult the ADLC on where it puts parameter 0 for this signature. | |
1023 VMReg reg = SharedRuntime::name_for_receiver(); | |
1024 oop r = *caller.oopmapreg_to_location(reg, reg_map); | |
1025 assert( Universe::heap()->is_in_or_null(r), "bad receiver" ); | |
1026 return r; | |
1027 } | |
1028 | |
1029 | |
1030 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const { | |
1031 if(reg->is_reg()) { | |
1032 // If it is passed in a register, it got spilled in the stub frame. | |
1033 return (oop *)reg_map->location(reg); | |
1034 } else { | |
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1035 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size; |
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1036 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes); |
0 | 1037 } |
1038 } | |
1039 | |
1040 BasicLock* frame::compiled_synchronized_native_monitor(nmethod* nm) { | |
1041 if (nm == NULL) { | |
1042 assert(_cb != NULL && _cb->is_nmethod() && | |
1043 nm->method()->is_native() && | |
1044 nm->method()->is_synchronized(), | |
1045 "should not call this otherwise"); | |
1046 nm = (nmethod*) _cb; | |
1047 } | |
1048 int byte_offset = in_bytes(nm->compiled_synchronized_native_basic_lock_sp_offset()); | |
1049 assert(byte_offset >= 0, "should not see invalid offset"); | |
1050 return (BasicLock*) &sp()[byte_offset / wordSize]; | |
1051 } | |
1052 | |
1053 oop frame::compiled_synchronized_native_monitor_owner(nmethod* nm) { | |
1054 if (nm == NULL) { | |
1055 assert(_cb != NULL && _cb->is_nmethod() && | |
1056 nm->method()->is_native() && | |
1057 nm->method()->is_synchronized(), | |
1058 "should not call this otherwise"); | |
1059 nm = (nmethod*) _cb; | |
1060 } | |
1061 int byte_offset = in_bytes(nm->compiled_synchronized_native_basic_lock_owner_sp_offset()); | |
1062 assert(byte_offset >= 0, "should not see invalid offset"); | |
1063 oop owner = ((oop*) sp())[byte_offset / wordSize]; | |
1064 assert( Universe::heap()->is_in(owner), "bad receiver" ); | |
1065 return owner; | |
1066 } | |
1067 | |
1068 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) { | |
1069 assert(map != NULL, "map must be set"); | |
1070 if (map->include_argument_oops()) { | |
1071 // must collect argument oops, as nobody else is doing it | |
1072 Thread *thread = Thread::current(); | |
1073 methodHandle m (thread, entry_frame_call_wrapper()->callee_method()); | |
1074 symbolHandle signature (thread, m->signature()); | |
1075 EntryFrameOopFinder finder(this, signature, m->is_static()); | |
1076 finder.arguments_do(f); | |
1077 } | |
1078 // Traverse the Handle Block saved in the entry frame | |
1079 entry_frame_call_wrapper()->oops_do(f); | |
1080 } | |
1081 | |
1082 | |
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1083 void frame::oops_do_internal(OopClosure* f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) { |
1119
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1084 #ifndef PRODUCT |
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1085 // simulate GC crash here to dump java thread in error report |
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1086 if (CrashGCForDumpingJavaThread) { |
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1087 char *t = NULL; |
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1088 *t = 'c'; |
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1089 } |
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1090 #endif |
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1091 if (is_interpreted_frame()) { |
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1092 oops_interpreted_do(f, map, use_interpreter_oop_map_cache); |
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1093 } else if (is_entry_frame()) { |
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1094 oops_entry_do(f, map); |
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1095 } else if (CodeCache::contains(pc())) { |
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1096 oops_code_blob_do(f, cf, map); |
0 | 1097 } else { |
1098 ShouldNotReachHere(); | |
1099 } | |
1100 } | |
1101 | |
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1102 void frame::nmethods_do(CodeBlobClosure* cf) { |
0 | 1103 if (_cb != NULL && _cb->is_nmethod()) { |
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1104 cf->do_code_blob(_cb); |
0 | 1105 } |
1106 } | |
1107 | |
1108 | |
1109 void frame::gc_prologue() { | |
1110 if (is_interpreted_frame()) { | |
1111 // set bcx to bci to become methodOop position independent during GC | |
1112 interpreter_frame_set_bcx(interpreter_frame_bci()); | |
1113 } | |
1114 } | |
1115 | |
1116 | |
1117 void frame::gc_epilogue() { | |
1118 if (is_interpreted_frame()) { | |
1119 // set bcx back to bcp for interpreter | |
1120 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp()); | |
1121 } | |
1122 // call processor specific epilog function | |
1123 pd_gc_epilog(); | |
1124 } | |
1125 | |
1126 | |
1127 # ifdef ENABLE_ZAP_DEAD_LOCALS | |
1128 | |
1129 void frame::CheckValueClosure::do_oop(oop* p) { | |
1130 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) { | |
1131 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); | |
1132 } | |
1133 } | |
1134 frame::CheckValueClosure frame::_check_value; | |
1135 | |
1136 | |
1137 void frame::CheckOopClosure::do_oop(oop* p) { | |
1138 if (*p != NULL && !(*p)->is_oop()) { | |
1139 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); | |
1140 } | |
1141 } | |
1142 frame::CheckOopClosure frame::_check_oop; | |
1143 | |
1144 void frame::check_derived_oop(oop* base, oop* derived) { | |
1145 _check_oop.do_oop(base); | |
1146 } | |
1147 | |
1148 | |
1149 void frame::ZapDeadClosure::do_oop(oop* p) { | |
1150 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p); | |
1151 // Need cast because on _LP64 the conversion to oop is ambiguous. Constant | |
1152 // can be either long or int. | |
1153 *p = (oop)(int)0xbabebabe; | |
1154 } | |
1155 frame::ZapDeadClosure frame::_zap_dead; | |
1156 | |
1157 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) { | |
1158 assert(thread == Thread::current(), "need to synchronize to do this to another thread"); | |
1159 // Tracing - part 1 | |
1160 if (TraceZapDeadLocals) { | |
1161 ResourceMark rm(thread); | |
1162 tty->print_cr("--------------------------------------------------------------------------------"); | |
1163 tty->print("Zapping dead locals in "); | |
1164 print_on(tty); | |
1165 tty->cr(); | |
1166 } | |
1167 // Zapping | |
1168 if (is_entry_frame ()) zap_dead_entry_locals (thread, map); | |
1169 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map); | |
1170 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map); | |
1171 | |
1172 else | |
1173 // could be is_runtime_frame | |
1174 // so remove error: ShouldNotReachHere(); | |
1175 ; | |
1176 // Tracing - part 2 | |
1177 if (TraceZapDeadLocals) { | |
1178 tty->cr(); | |
1179 } | |
1180 } | |
1181 | |
1182 | |
1183 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) { | |
1184 // get current interpreter 'pc' | |
1185 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
1186 methodOop m = interpreter_frame_method(); | |
1187 int bci = interpreter_frame_bci(); | |
1188 | |
1189 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); | |
1190 | |
1506 | 1191 // process dynamic part |
1192 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(), | |
1193 &_check_value); | |
1194 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(), | |
1195 &_check_oop ); | |
1196 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(), | |
1197 &_zap_dead ); | |
0 | 1198 |
1506 | 1199 // get frame map |
1200 InterpreterOopMap mask; | |
1201 m->mask_for(bci, &mask); | |
1202 mask.iterate_all( &oop_blk, &value_blk, &dead_blk); | |
0 | 1203 } |
1204 | |
1205 | |
1206 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) { | |
1207 | |
1208 ResourceMark rm(thread); | |
1209 assert(_cb != NULL, "sanity check"); | |
1210 if (_cb->oop_maps() != NULL) { | |
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1211 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value); |
0 | 1212 } |
1213 } | |
1214 | |
1215 | |
1216 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) { | |
1217 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented"); | |
1218 } | |
1219 | |
1220 | |
1221 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) { | |
1222 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented"); | |
1223 } | |
1224 | |
1225 # endif // ENABLE_ZAP_DEAD_LOCALS | |
1226 | |
1227 void frame::verify(const RegisterMap* map) { | |
1228 // for now make sure receiver type is correct | |
1229 if (is_interpreted_frame()) { | |
1230 methodOop method = interpreter_frame_method(); | |
1231 guarantee(method->is_method(), "method is wrong in frame::verify"); | |
1232 if (!method->is_static()) { | |
1233 // fetch the receiver | |
1234 oop* p = (oop*) interpreter_frame_local_at(0); | |
1235 // make sure we have the right receiver type | |
1236 } | |
1237 } | |
1238 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");) | |
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1239 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, (RegisterMap*)map, false); |
0 | 1240 } |
1241 | |
1242 | |
1243 #ifdef ASSERT | |
1244 bool frame::verify_return_pc(address x) { | |
1245 if (StubRoutines::returns_to_call_stub(x)) { | |
1246 return true; | |
1247 } | |
1248 if (CodeCache::contains(x)) { | |
1249 return true; | |
1250 } | |
1251 if (Interpreter::contains(x)) { | |
1252 return true; | |
1253 } | |
1254 return false; | |
1255 } | |
1256 #endif | |
1257 | |
1258 | |
1259 #ifdef ASSERT | |
1260 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const { | |
1261 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
1262 // verify that the value is in the right part of the frame | |
1263 address low_mark = (address) interpreter_frame_monitor_end(); | |
1264 address high_mark = (address) interpreter_frame_monitor_begin(); | |
1265 address current = (address) value; | |
1266 | |
1267 const int monitor_size = frame::interpreter_frame_monitor_size(); | |
1268 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*"); | |
1269 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark"); | |
1270 | |
1271 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*"); | |
1272 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark"); | |
1273 } | |
1274 #endif | |
1275 | |
1276 | |
1277 //----------------------------------------------------------------------------------- | |
1278 // StackFrameStream implementation | |
1279 | |
1280 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) { | |
1281 assert(thread->has_last_Java_frame(), "sanity check"); | |
1282 _fr = thread->last_frame(); | |
1283 _is_done = false; | |
1284 } |