1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc_interface/collectedHeap.inline.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/oopMapCache.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "memory/universe.inline.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/methodDataOop.hpp"
33 #include "oops/methodOop.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "oops/oop.inline2.hpp"
36 #include "prims/methodHandles.hpp"
37 #include "runtime/frame.inline.hpp"
38 #include "runtime/handles.inline.hpp"
39 #include "runtime/javaCalls.hpp"
40 #include "runtime/monitorChunk.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/signature.hpp"
43 #include "runtime/stubCodeGenerator.hpp"
44 #include "runtime/stubRoutines.hpp"
45 #include "utilities/decoder.hpp"
46
47 #ifdef TARGET_ARCH_x86
48 # include "nativeInst_x86.hpp"
49 #endif
50 #ifdef TARGET_ARCH_sparc
51 # include "nativeInst_sparc.hpp"
52 #endif
53 #ifdef TARGET_ARCH_zero
54 # include "nativeInst_zero.hpp"
55 #endif
56 #ifdef TARGET_ARCH_arm
57 # include "nativeInst_arm.hpp"
58 #endif
59 #ifdef TARGET_ARCH_ppc
60 # include "nativeInst_ppc.hpp"
61 #endif
62
63 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) {
64 _thread = thread;
65 _update_map = update_map;
66 clear();
67 debug_only(_update_for_id = NULL;)
68 #ifndef PRODUCT
69 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL;
70 #endif /* PRODUCT */
71 }
72
73 RegisterMap::RegisterMap(const RegisterMap* map) {
74 assert(map != this, "bad initialization parameter");
75 assert(map != NULL, "RegisterMap must be present");
76 _thread = map->thread();
77 _update_map = map->update_map();
78 _include_argument_oops = map->include_argument_oops();
79 debug_only(_update_for_id = map->_update_for_id;)
80 pd_initialize_from(map);
81 if (update_map()) {
82 for(int i = 0; i < location_valid_size; i++) {
83 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i];
84 _location_valid[i] = bits;
85 // for whichever bits are set, pull in the corresponding map->_location
86 int j = i*location_valid_type_size;
87 while (bits != 0) {
88 if ((bits & 1) != 0) {
89 assert(0 <= j && j < reg_count, "range check");
90 _location[j] = map->_location[j];
91 }
92 bits >>= 1;
93 j += 1;
94 }
95 }
96 }
97 }
98
99 void RegisterMap::clear() {
100 set_include_argument_oops(true);
101 if (_update_map) {
102 for(int i = 0; i < location_valid_size; i++) {
103 _location_valid[i] = 0;
104 }
105 pd_clear();
106 } else {
107 pd_initialize();
108 }
109 }
110
111 #ifndef PRODUCT
112
113 void RegisterMap::print_on(outputStream* st) const {
114 st->print_cr("Register map");
115 for(int i = 0; i < reg_count; i++) {
116
117 VMReg r = VMRegImpl::as_VMReg(i);
118 intptr_t* src = (intptr_t*) location(r);
119 if (src != NULL) {
120
121 r->print_on(st);
122 st->print(" [" INTPTR_FORMAT "] = ", src);
123 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) {
124 st->print_cr("<misaligned>");
125 } else {
126 st->print_cr(INTPTR_FORMAT, *src);
127 }
128 }
129 }
130 }
131
132 void RegisterMap::print() const {
133 print_on(tty);
134 }
135
136 #endif
137 // This returns the pc that if you were in the debugger you'd see. Not
138 // the idealized value in the frame object. This undoes the magic conversion
139 // that happens for deoptimized frames. In addition it makes the value the
140 // hardware would want to see in the native frame. The only user (at this point)
141 // is deoptimization. It likely no one else should ever use it.
142
143 address frame::raw_pc() const {
144 if (is_deoptimized_frame()) {
145 nmethod* nm = cb()->as_nmethod_or_null();
146 if (nm->is_method_handle_return(pc()))
147 return nm->deopt_mh_handler_begin() - pc_return_offset;
148 else
149 return nm->deopt_handler_begin() - pc_return_offset;
150 } else {
151 return (pc() - pc_return_offset);
152 }
153 }
154
155 // Change the pc in a frame object. This does not change the actual pc in
156 // actual frame. To do that use patch_pc.
157 //
158 void frame::set_pc(address newpc ) {
159 #ifdef ASSERT
160 if (_cb != NULL && _cb->is_nmethod()) {
161 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation");
162 }
163 #endif // ASSERT
164
165 // Unsafe to use the is_deoptimzed tester after changing pc
166 _deopt_state = unknown;
167 _pc = newpc;
168 _cb = CodeCache::find_blob_unsafe(_pc);
169
170 }
171
172 // type testers
173 bool frame::is_ricochet_frame() const {
174 RicochetBlob* rcb = SharedRuntime::ricochet_blob();
175 return (_cb == rcb && rcb != NULL && rcb->returns_to_bounce_addr(_pc));
176 }
177
178 bool frame::is_deoptimized_frame() const {
179 assert(_deopt_state != unknown, "not answerable");
180 return _deopt_state == is_deoptimized;
181 }
182
183 bool frame::is_native_frame() const {
184 return (_cb != NULL &&
185 _cb->is_nmethod() &&
186 ((nmethod*)_cb)->is_native_method());
187 }
188
189 bool frame::is_java_frame() const {
190 if (is_interpreted_frame()) return true;
191 if (is_compiled_frame()) return true;
192 return false;
193 }
194
195
196 bool frame::is_compiled_frame() const {
197 if (_cb != NULL &&
198 _cb->is_nmethod() &&
199 ((nmethod*)_cb)->is_java_method()) {
200 return true;
201 }
202 return false;
203 }
204
205
206 bool frame::is_runtime_frame() const {
207 return (_cb != NULL && _cb->is_runtime_stub());
208 }
209
210 bool frame::is_safepoint_blob_frame() const {
211 return (_cb != NULL && _cb->is_safepoint_stub());
212 }
213
214 // testers
215
216 bool frame::is_first_java_frame() const {
217 RegisterMap map(JavaThread::current(), false); // No update
218 frame s;
219 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map));
220 return s.is_first_frame();
221 }
222
223
224 bool frame::entry_frame_is_first() const {
225 return entry_frame_call_wrapper()->anchor()->last_Java_sp() == NULL;
226 }
227
228
229 bool frame::should_be_deoptimized() const {
230 if (_deopt_state == is_deoptimized ||
231 !is_compiled_frame() ) return false;
232 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod");
233 nmethod* nm = (nmethod *)_cb;
234 if (TraceDependencies) {
235 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
236 nm->print_value_on(tty);
237 tty->cr();
238 }
239
240 if( !nm->is_marked_for_deoptimization() )
241 return false;
242
243 // If at the return point, then the frame has already been popped, and
244 // only the return needs to be executed. Don't deoptimize here.
245 return !nm->is_at_poll_return(pc());
246 }
247
248 bool frame::can_be_deoptimized() const {
249 if (!is_compiled_frame()) return false;
250 nmethod* nm = (nmethod*)_cb;
251
252 if( !nm->can_be_deoptimized() )
253 return false;
254
255 return !nm->is_at_poll_return(pc());
256 }
257
258 void frame::deoptimize(JavaThread* thread) {
259 // Schedule deoptimization of an nmethod activation with this frame.
260 assert(_cb != NULL && _cb->is_nmethod(), "must be");
261 nmethod* nm = (nmethod*)_cb;
262
263 // This is a fix for register window patching race
264 if (NeedsDeoptSuspend && Thread::current() != thread) {
265 assert(SafepointSynchronize::is_at_safepoint(),
266 "patching other threads for deopt may only occur at a safepoint");
267
268 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that
269 // we could see the frame again and ask for it to be deoptimized since
270 // it might move for a long time. That is harmless and we just ignore it.
271 if (id() == thread->must_deopt_id()) {
272 assert(thread->is_deopt_suspend(), "lost suspension");
273 return;
274 }
275
276 // We are at a safepoint so the target thread can only be
277 // in 4 states:
278 // blocked - no problem
279 // blocked_trans - no problem (i.e. could have woken up from blocked
280 // during a safepoint).
281 // native - register window pc patching race
282 // native_trans - momentary state
283 //
284 // We could just wait out a thread in native_trans to block.
285 // Then we'd have all the issues that the safepoint code has as to
286 // whether to spin or block. It isn't worth it. Just treat it like
287 // native and be done with it.
288 //
289 // Examine the state of the thread at the start of safepoint since
290 // threads that were in native at the start of the safepoint could
291 // come to a halt during the safepoint, changing the current value
292 // of the safepoint_state.
293 JavaThreadState state = thread->safepoint_state()->orig_thread_state();
294 if (state == _thread_in_native || state == _thread_in_native_trans) {
295 // Since we are at a safepoint the target thread will stop itself
296 // before it can return to java as long as we remain at the safepoint.
297 // Therefore we can put an additional request for the thread to stop
298 // no matter what no (like a suspend). This will cause the thread
299 // to notice it needs to do the deopt on its own once it leaves native.
300 //
301 // The only reason we must do this is because on machine with register
302 // windows we have a race with patching the return address and the
303 // window coming live as the thread returns to the Java code (but still
304 // in native mode) and then blocks. It is only this top most frame
305 // that is at risk. So in truth we could add an additional check to
306 // see if this frame is one that is at risk.
307 RegisterMap map(thread, false);
308 frame at_risk = thread->last_frame().sender(&map);
309 if (id() == at_risk.id()) {
310 thread->set_must_deopt_id(id());
311 thread->set_deopt_suspend();
312 return;
313 }
314 }
315 } // NeedsDeoptSuspend
316
317
318 // If the call site is a MethodHandle call site use the MH deopt
319 // handler.
320 address deopt = nm->is_method_handle_return(pc()) ?
321 nm->deopt_mh_handler_begin() :
322 nm->deopt_handler_begin();
323
324 // Save the original pc before we patch in the new one
325 nm->set_original_pc(this, pc());
326 patch_pc(thread, deopt);
327
328 #ifdef ASSERT
329 {
330 RegisterMap map(thread, false);
331 frame check = thread->last_frame();
332 while (id() != check.id()) {
333 check = check.sender(&map);
334 }
335 assert(check.is_deoptimized_frame(), "missed deopt");
336 }
337 #endif // ASSERT
338 }
339
340 frame frame::java_sender() const {
341 RegisterMap map(JavaThread::current(), false);
342 frame s;
343 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ;
344 guarantee(s.is_java_frame(), "tried to get caller of first java frame");
345 return s;
346 }
347
348 frame frame::real_sender(RegisterMap* map) const {
349 frame result = sender(map);
350 while (result.is_runtime_frame() ||
351 result.is_ricochet_frame()) {
352 result = result.sender(map);
353 }
354 return result;
355 }
356
357 frame frame::sender_for_ricochet_frame(RegisterMap* map) const {
358 assert(is_ricochet_frame(), "");
359 return MethodHandles::ricochet_frame_sender(*this, map);
360 }
361
362 // Note: called by profiler - NOT for current thread
363 frame frame::profile_find_Java_sender_frame(JavaThread *thread) {
364 // If we don't recognize this frame, walk back up the stack until we do
365 RegisterMap map(thread, false);
366 frame first_java_frame = frame();
367
368 // Find the first Java frame on the stack starting with input frame
369 if (is_java_frame()) {
370 // top frame is compiled frame or deoptimized frame
371 first_java_frame = *this;
372 } else if (safe_for_sender(thread)) {
373 for (frame sender_frame = sender(&map);
374 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame();
375 sender_frame = sender_frame.sender(&map)) {
376 if (sender_frame.is_java_frame()) {
377 first_java_frame = sender_frame;
378 break;
379 }
380 }
381 }
382 return first_java_frame;
383 }
384
385 // Interpreter frames
386
387
388 void frame::interpreter_frame_set_locals(intptr_t* locs) {
389 assert(is_interpreted_frame(), "Not an interpreted frame");
390 *interpreter_frame_locals_addr() = locs;
391 }
392
393 methodOop frame::interpreter_frame_method() const {
394 assert(is_interpreted_frame(), "interpreted frame expected");
395 methodOop m = *interpreter_frame_method_addr();
396 assert(m->is_perm(), "bad methodOop in interpreter frame");
397 assert(m->is_method(), "not a methodOop");
398 return m;
399 }
400
401 void frame::interpreter_frame_set_method(methodOop method) {
402 assert(is_interpreted_frame(), "interpreted frame expected");
403 *interpreter_frame_method_addr() = method;
404 }
405
406 void frame::interpreter_frame_set_bcx(intptr_t bcx) {
407 assert(is_interpreted_frame(), "Not an interpreted frame");
408 if (ProfileInterpreter) {
409 bool formerly_bci = is_bci(interpreter_frame_bcx());
410 bool is_now_bci = is_bci(bcx);
411 *interpreter_frame_bcx_addr() = bcx;
412
413 intptr_t mdx = interpreter_frame_mdx();
414
415 if (mdx != 0) {
416 if (formerly_bci) {
417 if (!is_now_bci) {
418 // The bcx was just converted from bci to bcp.
419 // Convert the mdx in parallel.
420 methodDataOop mdo = interpreter_frame_method()->method_data();
421 assert(mdo != NULL, "");
422 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one.
423 address mdp = mdo->di_to_dp(mdi);
424 interpreter_frame_set_mdx((intptr_t)mdp);
425 }
426 } else {
427 if (is_now_bci) {
428 // The bcx was just converted from bcp to bci.
429 // Convert the mdx in parallel.
430 methodDataOop mdo = interpreter_frame_method()->method_data();
431 assert(mdo != NULL, "");
432 int mdi = mdo->dp_to_di((address)mdx);
433 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0.
434 }
435 }
436 }
437 } else {
438 *interpreter_frame_bcx_addr() = bcx;
439 }
440 }
441
442 jint frame::interpreter_frame_bci() const {
443 assert(is_interpreted_frame(), "interpreted frame expected");
444 intptr_t bcx = interpreter_frame_bcx();
445 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx);
446 }
447
448 void frame::interpreter_frame_set_bci(jint bci) {
449 assert(is_interpreted_frame(), "interpreted frame expected");
450 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC");
451 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci));
452 }
453
454 address frame::interpreter_frame_bcp() const {
455 assert(is_interpreted_frame(), "interpreted frame expected");
456 intptr_t bcx = interpreter_frame_bcx();
457 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx;
458 }
459
460 void frame::interpreter_frame_set_bcp(address bcp) {
461 assert(is_interpreted_frame(), "interpreted frame expected");
462 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC");
463 interpreter_frame_set_bcx((intptr_t)bcp);
464 }
465
466 void frame::interpreter_frame_set_mdx(intptr_t mdx) {
467 assert(is_interpreted_frame(), "Not an interpreted frame");
468 assert(ProfileInterpreter, "must be profiling interpreter");
469 *interpreter_frame_mdx_addr() = mdx;
470 }
471
472 address frame::interpreter_frame_mdp() const {
473 assert(ProfileInterpreter, "must be profiling interpreter");
474 assert(is_interpreted_frame(), "interpreted frame expected");
475 intptr_t bcx = interpreter_frame_bcx();
476 intptr_t mdx = interpreter_frame_mdx();
477
478 assert(!is_bci(bcx), "should not access mdp during GC");
479 return (address)mdx;
480 }
481
482 void frame::interpreter_frame_set_mdp(address mdp) {
483 assert(is_interpreted_frame(), "interpreted frame expected");
484 if (mdp == NULL) {
485 // Always allow the mdp to be cleared.
486 interpreter_frame_set_mdx((intptr_t)mdp);
487 }
488 intptr_t bcx = interpreter_frame_bcx();
489 assert(!is_bci(bcx), "should not set mdp during GC");
490 interpreter_frame_set_mdx((intptr_t)mdp);
491 }
492
493 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const {
494 assert(is_interpreted_frame(), "Not an interpreted frame");
495 #ifdef ASSERT
496 interpreter_frame_verify_monitor(current);
497 #endif
498 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size());
499 return next;
500 }
501
502 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const {
503 assert(is_interpreted_frame(), "Not an interpreted frame");
504 #ifdef ASSERT
505 // // This verification needs to be checked before being enabled
506 // interpreter_frame_verify_monitor(current);
507 #endif
508 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size());
509 return previous;
510 }
511
512 // Interpreter locals and expression stack locations.
513
514 intptr_t* frame::interpreter_frame_local_at(int index) const {
515 const int n = Interpreter::local_offset_in_bytes(index)/wordSize;
516 return &((*interpreter_frame_locals_addr())[n]);
517 }
518
519 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const {
520 const int i = offset * interpreter_frame_expression_stack_direction();
521 const int n = i * Interpreter::stackElementWords;
522 return &(interpreter_frame_expression_stack()[n]);
523 }
524
525 jint frame::interpreter_frame_expression_stack_size() const {
526 // Number of elements on the interpreter expression stack
527 // Callers should span by stackElementWords
528 int element_size = Interpreter::stackElementWords;
529 if (frame::interpreter_frame_expression_stack_direction() < 0) {
530 return (interpreter_frame_expression_stack() -
531 interpreter_frame_tos_address() + 1)/element_size;
532 } else {
533 return (interpreter_frame_tos_address() -
534 interpreter_frame_expression_stack() + 1)/element_size;
535 }
536 }
537
538
539 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp)
540
541 const char* frame::print_name() const {
542 if (is_native_frame()) return "Native";
543 if (is_interpreted_frame()) return "Interpreted";
544 if (is_ricochet_frame()) return "Ricochet";
545 if (is_compiled_frame()) {
546 if (is_deoptimized_frame()) return "Deoptimized";
547 return "Compiled";
548 }
549 if (sp() == NULL) return "Empty";
550 return "C";
551 }
552
553 void frame::print_value_on(outputStream* st, JavaThread *thread) const {
554 NOT_PRODUCT(address begin = pc()-40;)
555 NOT_PRODUCT(address end = NULL;)
556
557 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp());
558 if (sp() != NULL)
559 st->print(", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), pc());
560
561 if (StubRoutines::contains(pc())) {
562 st->print_cr(")");
563 st->print("(");
564 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
565 st->print("~Stub::%s", desc->name());
566 NOT_PRODUCT(begin = desc->begin(); end = desc->end();)
567 } else if (Interpreter::contains(pc())) {
568 st->print_cr(")");
569 st->print("(");
570 InterpreterCodelet* desc = Interpreter::codelet_containing(pc());
571 if (desc != NULL) {
572 st->print("~");
573 desc->print();
574 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();)
575 } else {
576 st->print("~interpreter");
577 }
578 }
579 st->print_cr(")");
580
581 if (_cb != NULL) {
582 st->print(" ");
583 _cb->print_value_on(st);
584 st->cr();
585 #ifndef PRODUCT
586 if (end == NULL) {
587 begin = _cb->code_begin();
588 end = _cb->code_end();
589 }
590 #endif
591 }
592 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);)
593 }
594
595
596 void frame::print_on(outputStream* st) const {
597 print_value_on(st,NULL);
598 if (is_interpreted_frame()) {
599 interpreter_frame_print_on(st);
600 }
601 }
602
603
604 void frame::interpreter_frame_print_on(outputStream* st) const {
605 #ifndef PRODUCT
606 assert(is_interpreted_frame(), "Not an interpreted frame");
607 jint i;
608 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) {
609 intptr_t x = *interpreter_frame_local_at(i);
610 st->print(" - local [" INTPTR_FORMAT "]", x);
611 st->fill_to(23);
612 st->print_cr("; #%d", i);
613 }
614 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) {
615 intptr_t x = *interpreter_frame_expression_stack_at(i);
616 st->print(" - stack [" INTPTR_FORMAT "]", x);
617 st->fill_to(23);
618 st->print_cr("; #%d", i);
619 }
620 // locks for synchronization
621 for (BasicObjectLock* current = interpreter_frame_monitor_end();
622 current < interpreter_frame_monitor_begin();
623 current = next_monitor_in_interpreter_frame(current)) {
624 st->print(" - obj [");
625 current->obj()->print_value_on(st);
626 st->print_cr("]");
627 st->print(" - lock [");
628 current->lock()->print_on(st);
629 st->print_cr("]");
630 }
631 // monitor
632 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin());
633 // bcp
634 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp());
635 st->fill_to(23);
636 st->print_cr("; @%d", interpreter_frame_bci());
637 // locals
638 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0));
639 // method
640 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method());
641 st->fill_to(23);
642 st->print("; ");
643 interpreter_frame_method()->print_name(st);
644 st->cr();
645 #endif
646 }
647
648 // Return whether the frame is in the VM or os indicating a Hotspot problem.
649 // Otherwise, it's likely a bug in the native library that the Java code calls,
650 // hopefully indicating where to submit bugs.
651 static void print_C_frame(outputStream* st, char* buf, int buflen, address pc) {
652 // C/C++ frame
653 bool in_vm = os::address_is_in_vm(pc);
654 st->print(in_vm ? "V" : "C");
655
656 int offset;
657 bool found;
658
659 // libname
660 found = os::dll_address_to_library_name(pc, buf, buflen, &offset);
661 if (found) {
662 // skip directory names
663 const char *p1, *p2;
664 p1 = buf;
665 int len = (int)strlen(os::file_separator());
666 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
667 st->print(" [%s+0x%x]", p1, offset);
668 } else {
669 st->print(" " PTR_FORMAT, pc);
670 }
671
672 // function name - os::dll_address_to_function_name() may return confusing
673 // names if pc is within jvm.dll or libjvm.so, because JVM only has
674 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this
675 // only for native libraries.
676 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) {
677 found = os::dll_address_to_function_name(pc, buf, buflen, &offset);
678
679 if (found) {
680 st->print(" %s+0x%x", buf, offset);
681 }
682 }
683 }
684
685 // frame::print_on_error() is called by fatal error handler. Notice that we may
686 // crash inside this function if stack frame is corrupted. The fatal error
687 // handler can catch and handle the crash. Here we assume the frame is valid.
688 //
689 // First letter indicates type of the frame:
690 // J: Java frame (compiled)
691 // j: Java frame (interpreted)
692 // V: VM frame (C/C++)
693 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.)
694 // C: C/C++ frame
695 //
696 // We don't need detailed frame type as that in frame::print_name(). "C"
697 // suggests the problem is in user lib; everything else is likely a VM bug.
698
699 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const {
700 if (_cb != NULL) {
701 if (Interpreter::contains(pc())) {
702 methodOop m = this->interpreter_frame_method();
703 if (m != NULL) {
704 m->name_and_sig_as_C_string(buf, buflen);
705 st->print("j %s", buf);
706 st->print("+%d", this->interpreter_frame_bci());
707 } else {
708 st->print("j " PTR_FORMAT, pc());
709 }
710 } else if (StubRoutines::contains(pc())) {
711 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
712 if (desc != NULL) {
713 st->print("v ~StubRoutines::%s", desc->name());
714 } else {
715 st->print("v ~StubRoutines::" PTR_FORMAT, pc());
716 }
717 } else if (_cb->is_buffer_blob()) {
718 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name());
719 } else if (_cb->is_nmethod()) {
720 methodOop m = ((nmethod *)_cb)->method();
721 if (m != NULL) {
722 m->name_and_sig_as_C_string(buf, buflen);
723 st->print("J %s", buf);
724 } else {
725 st->print("J " PTR_FORMAT, pc());
726 }
727 } else if (_cb->is_runtime_stub()) {
728 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name());
729 } else if (_cb->is_deoptimization_stub()) {
730 st->print("v ~DeoptimizationBlob");
731 } else if (_cb->is_ricochet_stub()) {
732 st->print("v ~RichochetBlob");
733 } else if (_cb->is_exception_stub()) {
734 st->print("v ~ExceptionBlob");
735 } else if (_cb->is_safepoint_stub()) {
736 st->print("v ~SafepointBlob");
737 } else {
738 st->print("v blob " PTR_FORMAT, pc());
739 }
740 } else {
741 print_C_frame(st, buf, buflen, pc());
742 }
743 }
744
745
746 /*
747 The interpreter_frame_expression_stack_at method in the case of SPARC needs the
748 max_stack value of the method in order to compute the expression stack address.
749 It uses the methodOop in order to get the max_stack value but during GC this
750 methodOop value saved on the frame is changed by reverse_and_push and hence cannot
751 be used. So we save the max_stack value in the FrameClosure object and pass it
752 down to the interpreter_frame_expression_stack_at method
753 */
754 class InterpreterFrameClosure : public OffsetClosure {
755 private:
756 frame* _fr;
757 OopClosure* _f;
758 int _max_locals;
759 int _max_stack;
760
761 public:
762 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack,
763 OopClosure* f) {
764 _fr = fr;
765 _max_locals = max_locals;
766 _max_stack = max_stack;
767 _f = f;
768 }
769
770 void offset_do(int offset) {
771 oop* addr;
772 if (offset < _max_locals) {
773 addr = (oop*) _fr->interpreter_frame_local_at(offset);
774 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame");
775 _f->do_oop(addr);
776 } else {
777 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals));
778 // In case of exceptions, the expression stack is invalid and the esp will be reset to express
779 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel).
780 bool in_stack;
781 if (frame::interpreter_frame_expression_stack_direction() > 0) {
782 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address();
783 } else {
784 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address();
785 }
786 if (in_stack) {
787 _f->do_oop(addr);
788 }
789 }
790 }
791
792 int max_locals() { return _max_locals; }
793 frame* fr() { return _fr; }
794 };
795
796
797 class InterpretedArgumentOopFinder: public SignatureInfo {
798 private:
799 OopClosure* _f; // Closure to invoke
800 int _offset; // TOS-relative offset, decremented with each argument
801 bool _has_receiver; // true if the callee has a receiver
802 frame* _fr;
803
804 void set(int size, BasicType type) {
805 _offset -= size;
806 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do();
807 }
808
809 void oop_offset_do() {
810 oop* addr;
811 addr = (oop*)_fr->interpreter_frame_tos_at(_offset);
812 _f->do_oop(addr);
813 }
814
815 public:
816 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) {
817 // compute size of arguments
818 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0);
819 assert(!fr->is_interpreted_frame() ||
820 args_size <= fr->interpreter_frame_expression_stack_size(),
821 "args cannot be on stack anymore");
822 // initialize InterpretedArgumentOopFinder
823 _f = f;
824 _fr = fr;
825 _offset = args_size;
826 }
827
828 void oops_do() {
829 if (_has_receiver) {
830 --_offset;
831 oop_offset_do();
832 }
833 iterate_parameters();
834 }
835 };
836
837
838 // Entry frame has following form (n arguments)
839 // +-----------+
840 // sp -> | last arg |
841 // +-----------+
842 // : ::: :
843 // +-----------+
844 // (sp+n)->| first arg|
845 // +-----------+
846
847
848
849 // visits and GC's all the arguments in entry frame
850 class EntryFrameOopFinder: public SignatureInfo {
851 private:
852 bool _is_static;
853 int _offset;
854 frame* _fr;
855 OopClosure* _f;
856
857 void set(int size, BasicType type) {
858 assert (_offset >= 0, "illegal offset");
859 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset);
860 _offset -= size;
861 }
862
863 void oop_at_offset_do(int offset) {
864 assert (offset >= 0, "illegal offset");
865 oop* addr = (oop*) _fr->entry_frame_argument_at(offset);
866 _f->do_oop(addr);
867 }
868
869 public:
870 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) {
871 _f = NULL; // will be set later
872 _fr = frame;
873 _is_static = is_static;
874 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0
875 }
876
877 void arguments_do(OopClosure* f) {
878 _f = f;
879 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver
880 iterate_parameters();
881 }
882
883 };
884
885 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) {
886 ArgumentSizeComputer asc(signature);
887 int size = asc.size();
888 return (oop *)interpreter_frame_tos_at(size);
889 }
890
891
892 void frame::oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache) {
893 assert(is_interpreted_frame(), "Not an interpreted frame");
894 assert(map != NULL, "map must be set");
895 Thread *thread = Thread::current();
896 methodHandle m (thread, interpreter_frame_method());
897 jint bci = interpreter_frame_bci();
898
899 assert(Universe::heap()->is_in(m()), "must be valid oop");
900 assert(m->is_method(), "checking frame value");
901 assert((m->is_native() && bci == 0) || (!m->is_native() && bci >= 0 && bci < m->code_size()), "invalid bci value");
902
903 // Handle the monitor elements in the activation
904 for (
905 BasicObjectLock* current = interpreter_frame_monitor_end();
906 current < interpreter_frame_monitor_begin();
907 current = next_monitor_in_interpreter_frame(current)
908 ) {
909 #ifdef ASSERT
910 interpreter_frame_verify_monitor(current);
911 #endif
912 current->oops_do(f);
913 }
914
915 // process fixed part
916 f->do_oop((oop*)interpreter_frame_method_addr());
917 f->do_oop((oop*)interpreter_frame_cache_addr());
918
919 // Hmm what about the mdp?
920 #ifdef CC_INTERP
921 // Interpreter frame in the midst of a call have a methodOop within the
922 // object.
923 interpreterState istate = get_interpreterState();
924 if (istate->msg() == BytecodeInterpreter::call_method) {
925 f->do_oop((oop*)&istate->_result._to_call._callee);
926 }
927
928 #endif /* CC_INTERP */
929
930 #if !defined(PPC) || defined(ZERO)
931 if (m->is_native()) {
932 #ifdef CC_INTERP
933 f->do_oop((oop*)&istate->_oop_temp);
934 #else
935 f->do_oop((oop*)( fp() + interpreter_frame_oop_temp_offset ));
936 #endif /* CC_INTERP */
937 }
938 #else // PPC
939 if (m->is_native() && m->is_static()) {
940 f->do_oop(interpreter_frame_mirror_addr());
941 }
942 #endif // PPC
943
944 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
945
946 Symbol* signature = NULL;
947 bool has_receiver = false;
948
949 // Process a callee's arguments if we are at a call site
950 // (i.e., if we are at an invoke bytecode)
951 // This is used sometimes for calling into the VM, not for another
952 // interpreted or compiled frame.
953 if (!m->is_native()) {
954 Bytecode_invoke call = Bytecode_invoke_check(m, bci);
955 if (call.is_valid()) {
956 signature = call.signature();
957 has_receiver = call.has_receiver();
958 if (map->include_argument_oops() &&
959 interpreter_frame_expression_stack_size() > 0) {
960 ResourceMark rm(thread); // is this right ???
961 // we are at a call site & the expression stack is not empty
962 // => process callee's arguments
963 //
964 // Note: The expression stack can be empty if an exception
965 // occurred during method resolution/execution. In all
966 // cases we empty the expression stack completely be-
967 // fore handling the exception (the exception handling
968 // code in the interpreter calls a blocking runtime
969 // routine which can cause this code to be executed).
970 // (was bug gri 7/27/98)
971 oops_interpreted_arguments_do(signature, has_receiver, f);
972 }
973 }
974 }
975
976 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f);
977
978 // process locals & expression stack
979 InterpreterOopMap mask;
980 if (query_oop_map_cache) {
981 m->mask_for(bci, &mask);
982 } else {
983 OopMapCache::compute_one_oop_map(m, bci, &mask);
984 }
985 mask.iterate_oop(&blk);
986 }
987
988
989 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) {
990 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f);
991 finder.oops_do();
992 }
993
994 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) {
995 assert(_cb != NULL, "sanity check");
996 if (_cb == SharedRuntime::ricochet_blob()) {
997 oops_ricochet_do(f, reg_map);
998 }
999 if (_cb->oop_maps() != NULL) {
1000 OopMapSet::oops_do(this, reg_map, f);
1001
1002 // Preserve potential arguments for a callee. We handle this by dispatching
1003 // on the codeblob. For c2i, we do
1004 if (reg_map->include_argument_oops()) {
1005 _cb->preserve_callee_argument_oops(*this, reg_map, f);
1006 }
1007 }
1008 // In cases where perm gen is collected, GC will want to mark
1009 // oops referenced from nmethods active on thread stacks so as to
1010 // prevent them from being collected. However, this visit should be
1011 // restricted to certain phases of the collection only. The
1012 // closure decides how it wants nmethods to be traced.
1013 if (cf != NULL)
1014 cf->do_code_blob(_cb);
1015 }
1016
1017 void frame::oops_ricochet_do(OopClosure* f, const RegisterMap* map) {
1018 assert(is_ricochet_frame(), "");
1019 MethodHandles::ricochet_frame_oops_do(*this, f, map);
1020 }
1021
1022 class CompiledArgumentOopFinder: public SignatureInfo {
1023 protected:
1024 OopClosure* _f;
1025 int _offset; // the current offset, incremented with each argument
1026 bool _has_receiver; // true if the callee has a receiver
1027 frame _fr;
1028 RegisterMap* _reg_map;
1029 int _arg_size;
1030 VMRegPair* _regs; // VMReg list of arguments
1031
1032 void set(int size, BasicType type) {
1033 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset();
1034 _offset += size;
1035 }
1036
1037 virtual void handle_oop_offset() {
1038 // Extract low order register number from register array.
1039 // In LP64-land, the high-order bits are valid but unhelpful.
1040 VMReg reg = _regs[_offset].first();
1041 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map);
1042 _f->do_oop(loc);
1043 }
1044
1045 public:
1046 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, OopClosure* f, frame fr, const RegisterMap* reg_map)
1047 : SignatureInfo(signature) {
1048
1049 // initialize CompiledArgumentOopFinder
1050 _f = f;
1051 _offset = 0;
1052 _has_receiver = has_receiver;
1053 _fr = fr;
1054 _reg_map = (RegisterMap*)reg_map;
1055 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0);
1056
1057 int arg_size;
1058 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, &arg_size);
1059 assert(arg_size == _arg_size, "wrong arg size");
1060 }
1061
1062 void oops_do() {
1063 if (_has_receiver) {
1064 handle_oop_offset();
1065 _offset++;
1066 }
1067 iterate_parameters();
1068 }
1069 };
1070
1071 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, const RegisterMap* reg_map, OopClosure* f) {
1072 ResourceMark rm;
1073 CompiledArgumentOopFinder finder(signature, has_receiver, f, *this, reg_map);
1074 finder.oops_do();
1075 }
1076
1077
1078 // Get receiver out of callers frame, i.e. find parameter 0 in callers
1079 // frame. Consult ADLC for where parameter 0 is to be found. Then
1080 // check local reg_map for it being a callee-save register or argument
1081 // register, both of which are saved in the local frame. If not found
1082 // there, it must be an in-stack argument of the caller.
1083 // Note: caller.sp() points to callee-arguments
1084 oop frame::retrieve_receiver(RegisterMap* reg_map) {
1085 frame caller = *this;
1086
1087 // First consult the ADLC on where it puts parameter 0 for this signature.
1088 VMReg reg = SharedRuntime::name_for_receiver();
1089 oop r = *caller.oopmapreg_to_location(reg, reg_map);
1090 assert( Universe::heap()->is_in_or_null(r), "bad receiver" );
1091 return r;
1092 }
1093
1094
1095 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const {
1096 if(reg->is_reg()) {
1097 // If it is passed in a register, it got spilled in the stub frame.
1098 return (oop *)reg_map->location(reg);
1099 } else {
1100 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size;
1101 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes);
1102 }
1103 }
1104
1105 BasicLock* frame::get_native_monitor() {
1106 nmethod* nm = (nmethod*)_cb;
1107 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1108 "Should not call this unless it's a native nmethod");
1109 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset());
1110 assert(byte_offset >= 0, "should not see invalid offset");
1111 return (BasicLock*) &sp()[byte_offset / wordSize];
1112 }
1113
1114 oop frame::get_native_receiver() {
1115 nmethod* nm = (nmethod*)_cb;
1116 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1117 "Should not call this unless it's a native nmethod");
1118 int byte_offset = in_bytes(nm->native_receiver_sp_offset());
1119 assert(byte_offset >= 0, "should not see invalid offset");
1120 oop owner = ((oop*) sp())[byte_offset / wordSize];
1121 assert( Universe::heap()->is_in(owner), "bad receiver" );
1122 return owner;
1123 }
1124
1125 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) {
1126 assert(map != NULL, "map must be set");
1127 if (map->include_argument_oops()) {
1128 // must collect argument oops, as nobody else is doing it
1129 Thread *thread = Thread::current();
1130 methodHandle m (thread, entry_frame_call_wrapper()->callee_method());
1131 EntryFrameOopFinder finder(this, m->signature(), m->is_static());
1132 finder.arguments_do(f);
1133 }
1134 // Traverse the Handle Block saved in the entry frame
1135 entry_frame_call_wrapper()->oops_do(f);
1136 }
1137
1138
1139 void frame::oops_do_internal(OopClosure* f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) {
1140 #ifndef PRODUCT
1141 // simulate GC crash here to dump java thread in error report
1142 if (CrashGCForDumpingJavaThread) {
1143 char *t = NULL;
1144 *t = 'c';
1145 }
1146 #endif
1147 if (is_interpreted_frame()) {
1148 oops_interpreted_do(f, map, use_interpreter_oop_map_cache);
1149 } else if (is_entry_frame()) {
1150 oops_entry_do(f, map);
1151 } else if (CodeCache::contains(pc())) {
1152 oops_code_blob_do(f, cf, map);
1153 #ifdef SHARK
1154 } else if (is_fake_stub_frame()) {
1155 // nothing to do
1156 #endif // SHARK
1157 } else {
1158 ShouldNotReachHere();
1159 }
1160 }
1161
1162 void frame::nmethods_do(CodeBlobClosure* cf) {
1163 if (_cb != NULL && _cb->is_nmethod()) {
1164 cf->do_code_blob(_cb);
1165 }
1166 }
1167
1168
1169 void frame::gc_prologue() {
1170 if (is_interpreted_frame()) {
1171 // set bcx to bci to become methodOop position independent during GC
1172 interpreter_frame_set_bcx(interpreter_frame_bci());
1173 }
1174 }
1175
1176
1177 void frame::gc_epilogue() {
1178 if (is_interpreted_frame()) {
1179 // set bcx back to bcp for interpreter
1180 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp());
1181 }
1182 // call processor specific epilog function
1183 pd_gc_epilog();
1184 }
1185
1186
1187 # ifdef ENABLE_ZAP_DEAD_LOCALS
1188
1189 void frame::CheckValueClosure::do_oop(oop* p) {
1190 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) {
1191 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1192 }
1193 }
1194 frame::CheckValueClosure frame::_check_value;
1195
1196
1197 void frame::CheckOopClosure::do_oop(oop* p) {
1198 if (*p != NULL && !(*p)->is_oop()) {
1199 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1200 }
1201 }
1202 frame::CheckOopClosure frame::_check_oop;
1203
1204 void frame::check_derived_oop(oop* base, oop* derived) {
1205 _check_oop.do_oop(base);
1206 }
1207
1208
1209 void frame::ZapDeadClosure::do_oop(oop* p) {
1210 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p);
1211 // Need cast because on _LP64 the conversion to oop is ambiguous. Constant
1212 // can be either long or int.
1213 *p = (oop)(int)0xbabebabe;
1214 }
1215 frame::ZapDeadClosure frame::_zap_dead;
1216
1217 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) {
1218 assert(thread == Thread::current(), "need to synchronize to do this to another thread");
1219 // Tracing - part 1
1220 if (TraceZapDeadLocals) {
1221 ResourceMark rm(thread);
1222 tty->print_cr("--------------------------------------------------------------------------------");
1223 tty->print("Zapping dead locals in ");
1224 print_on(tty);
1225 tty->cr();
1226 }
1227 // Zapping
1228 if (is_entry_frame ()) zap_dead_entry_locals (thread, map);
1229 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map);
1230 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map);
1231
1232 else
1233 // could be is_runtime_frame
1234 // so remove error: ShouldNotReachHere();
1235 ;
1236 // Tracing - part 2
1237 if (TraceZapDeadLocals) {
1238 tty->cr();
1239 }
1240 }
1241
1242
1243 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) {
1244 // get current interpreter 'pc'
1245 assert(is_interpreted_frame(), "Not an interpreted frame");
1246 methodOop m = interpreter_frame_method();
1247 int bci = interpreter_frame_bci();
1248
1249 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
1250
1251 // process dynamic part
1252 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(),
1253 &_check_value);
1254 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(),
1255 &_check_oop );
1256 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(),
1257 &_zap_dead );
1258
1259 // get frame map
1260 InterpreterOopMap mask;
1261 m->mask_for(bci, &mask);
1262 mask.iterate_all( &oop_blk, &value_blk, &dead_blk);
1263 }
1264
1265
1266 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) {
1267
1268 ResourceMark rm(thread);
1269 assert(_cb != NULL, "sanity check");
1270 if (_cb->oop_maps() != NULL) {
1271 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value);
1272 }
1273 }
1274
1275
1276 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) {
1277 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented");
1278 }
1279
1280
1281 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) {
1282 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented");
1283 }
1284
1285 # endif // ENABLE_ZAP_DEAD_LOCALS
1286
1287 void frame::verify(const RegisterMap* map) {
1288 // for now make sure receiver type is correct
1289 if (is_interpreted_frame()) {
1290 methodOop method = interpreter_frame_method();
1291 guarantee(method->is_method(), "method is wrong in frame::verify");
1292 if (!method->is_static()) {
1293 // fetch the receiver
1294 oop* p = (oop*) interpreter_frame_local_at(0);
1295 // make sure we have the right receiver type
1296 }
1297 }
1298 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");)
1299 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, (RegisterMap*)map, false);
1300 }
1301
1302
1303 #ifdef ASSERT
1304 bool frame::verify_return_pc(address x) {
1305 if (StubRoutines::returns_to_call_stub(x)) {
1306 return true;
1307 }
1308 if (CodeCache::contains(x)) {
1309 return true;
1310 }
1311 if (Interpreter::contains(x)) {
1312 return true;
1313 }
1314 return false;
1315 }
1316 #endif
1317
1318
1319 #ifdef ASSERT
1320 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const {
1321 assert(is_interpreted_frame(), "Not an interpreted frame");
1322 // verify that the value is in the right part of the frame
1323 address low_mark = (address) interpreter_frame_monitor_end();
1324 address high_mark = (address) interpreter_frame_monitor_begin();
1325 address current = (address) value;
1326
1327 const int monitor_size = frame::interpreter_frame_monitor_size();
1328 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*");
1329 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark");
1330
1331 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*");
1332 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark");
1333 }
1334
1335
1336 void frame::describe(FrameValues& values, int frame_no) {
1337 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) {
1338 // Label values common to most frames
1339 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no));
1340 values.describe(-1, sp(), err_msg("sp for #%d", frame_no));
1341 if (is_compiled_frame()) {
1342 values.describe(-1, sp() + _cb->frame_size(), err_msg("computed fp for #%d", frame_no));
1343 } else {
1344 values.describe(-1, fp(), err_msg("fp for #%d", frame_no));
1345 }
1346 }
1347 if (is_interpreted_frame()) {
1348 methodOop m = interpreter_frame_method();
1349 int bci = interpreter_frame_bci();
1350
1351 // Label the method and current bci
1352 values.describe(-1, MAX2(sp(), fp()),
1353 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2);
1354 values.describe(-1, MAX2(sp(), fp()),
1355 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1);
1356 if (m->max_locals() > 0) {
1357 intptr_t* l0 = interpreter_frame_local_at(0);
1358 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1);
1359 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1);
1360 // Report each local and mark as owned by this frame
1361 for (int l = 0; l < m->max_locals(); l++) {
1362 intptr_t* l0 = interpreter_frame_local_at(l);
1363 values.describe(frame_no, l0, err_msg("local %d", l));
1364 }
1365 }
1366
1367 // Compute the actual expression stack size
1368 InterpreterOopMap mask;
1369 OopMapCache::compute_one_oop_map(m, bci, &mask);
1370 intptr_t* tos = NULL;
1371 // Report each stack element and mark as owned by this frame
1372 for (int e = 0; e < mask.expression_stack_size(); e++) {
1373 tos = MAX2(tos, interpreter_frame_expression_stack_at(e));
1374 values.describe(frame_no, interpreter_frame_expression_stack_at(e),
1375 err_msg("stack %d", e));
1376 }
1377 if (tos != NULL) {
1378 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1);
1379 }
1380 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) {
1381 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin");
1382 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end");
1383 }
1384 } else if (is_entry_frame()) {
1385 // For now just label the frame
1386 values.describe(-1, MAX2(sp(), fp()), err_msg("#%d entry frame", frame_no), 2);
1387 } else if (is_compiled_frame()) {
1388 // For now just label the frame
1389 nmethod* nm = cb()->as_nmethod_or_null();
1390 values.describe(-1, MAX2(sp(), fp()),
1391 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no,
1392 nm, nm->method()->name_and_sig_as_C_string(),
1393 is_deoptimized_frame() ? " (deoptimized" : ""), 2);
1394 } else if (is_native_frame()) {
1395 // For now just label the frame
1396 nmethod* nm = cb()->as_nmethod_or_null();
1397 values.describe(-1, MAX2(sp(), fp()),
1398 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no,
1399 nm, nm->method()->name_and_sig_as_C_string()), 2);
1400 }
1401 describe_pd(values, frame_no);
1402 }
1403
1404 #endif
1405
1406
1407 //-----------------------------------------------------------------------------------
1408 // StackFrameStream implementation
1409
1410 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) {
1411 assert(thread->has_last_Java_frame(), "sanity check");
1412 _fr = thread->last_frame();
1413 _is_done = false;
1414 }
1415
1416
1417 #ifdef ASSERT
1418
1419 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) {
1420 FrameValue fv;
1421 fv.location = location;
1422 fv.owner = owner;
1423 fv.priority = priority;
1424 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1);
1425 strcpy(fv.description, description);
1426 _values.append(fv);
1427 }
1428
1429
1430 void FrameValues::validate() {
1431 _values.sort(compare);
1432 bool error = false;
1433 FrameValue prev;
1434 prev.owner = -1;
1435 for (int i = _values.length() - 1; i >= 0; i--) {
1436 FrameValue fv = _values.at(i);
1437 if (fv.owner == -1) continue;
1438 if (prev.owner == -1) {
1439 prev = fv;
1440 continue;
1441 }
1442 if (prev.location == fv.location) {
1443 if (fv.owner != prev.owner) {
1444 tty->print_cr("overlapping storage");
1445 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description);
1446 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1447 error = true;
1448 }
1449 } else {
1450 prev = fv;
1451 }
1452 }
1453 assert(!error, "invalid layout");
1454 }
1455
1456
1457 void FrameValues::print(JavaThread* thread) {
1458 _values.sort(compare);
1459
1460 // Sometimes values like the fp can be invalid values if the
1461 // register map wasn't updated during the walk. Trim out values
1462 // that aren't actually in the stack of the thread.
1463 int min_index = 0;
1464 int max_index = _values.length() - 1;
1465 intptr_t* v0 = _values.at(min_index).location;
1466 intptr_t* v1 = _values.at(max_index).location;
1467
1468 if (thread == Thread::current()) {
1469 while (!thread->is_in_stack((address)v0)) {
1470 v0 = _values.at(++min_index).location;
1471 }
1472 while (!thread->is_in_stack((address)v1)) {
1473 v1 = _values.at(--max_index).location;
1474 }
1475 } else {
1476 while (!thread->on_local_stack((address)v0)) {
1477 v0 = _values.at(++min_index).location;
1478 }
1479 while (!thread->on_local_stack((address)v1)) {
1480 v1 = _values.at(--max_index).location;
1481 }
1482 }
1483 intptr_t* min = MIN2(v0, v1);
1484 intptr_t* max = MAX2(v0, v1);
1485 intptr_t* cur = max;
1486 intptr_t* last = NULL;
1487 for (int i = max_index; i >= min_index; i--) {
1488 FrameValue fv = _values.at(i);
1489 while (cur > fv.location) {
1490 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur);
1491 cur--;
1492 }
1493 if (last == fv.location) {
1494 const char* spacer = " " LP64_ONLY(" ");
1495 tty->print_cr(" %s %s %s", spacer, spacer, fv.description);
1496 } else {
1497 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1498 last = fv.location;
1499 cur--;
1500 }
1501 }
1502 }
1503
1504 #endif