1 /*
2 * Copyright (c) 1997, 2015, 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 "interpreter/interpreter.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "oops/markOop.hpp"
29 #include "oops/method.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "prims/methodHandles.hpp"
32 #include "runtime/frame.inline.hpp"
33 #include "runtime/handles.inline.hpp"
34 #include "runtime/javaCalls.hpp"
35 #include "runtime/monitorChunk.hpp"
36 #include "runtime/os.inline.hpp"
37 #include "runtime/signature.hpp"
38 #include "runtime/stubCodeGenerator.hpp"
39 #include "runtime/stubRoutines.hpp"
40 #include "vmreg_x86.inline.hpp"
41 #ifdef COMPILER1
42 #include "c1/c1_Runtime1.hpp"
43 #include "runtime/vframeArray.hpp"
44 #endif
45
46 #ifdef ASSERT
47 void RegisterMap::check_location_valid() {
48 }
49 #endif
50
51 // Profiling/safepoint support
52
53 bool frame::safe_for_sender(JavaThread *thread) {
54 address sp = (address)_sp;
55 address fp = (address)_fp;
56 address unextended_sp = (address)_unextended_sp;
57
58 // consider stack guards when trying to determine "safe" stack pointers
59 static size_t stack_guard_size = os::uses_stack_guard_pages() ?
60 JavaThread::stack_red_zone_size() + JavaThread::stack_yellow_zone_size() : 0;
61 size_t usable_stack_size = thread->stack_size() - stack_guard_size;
62
63 // sp must be within the usable part of the stack (not in guards)
64 bool sp_safe = (sp < thread->stack_base()) &&
65 (sp >= thread->stack_base() - usable_stack_size);
66
67
68 if (!sp_safe) {
69 return false;
70 }
71
72 // unextended sp must be within the stack and above or equal sp
73 bool unextended_sp_safe = (unextended_sp < thread->stack_base()) &&
74 (unextended_sp >= sp);
75
76 if (!unextended_sp_safe) {
77 return false;
78 }
79
80 // an fp must be within the stack and above (but not equal) sp
81 // second evaluation on fp+ is added to handle situation where fp is -1
82 bool fp_safe = (fp < thread->stack_base() && (fp > sp) && (((fp + (return_addr_offset * sizeof(void*))) < thread->stack_base())));
83
84 // We know sp/unextended_sp are safe only fp is questionable here
85
86 // If the current frame is known to the code cache then we can attempt to
87 // to construct the sender and do some validation of it. This goes a long way
88 // toward eliminating issues when we get in frame construction code
89
90 if (_cb != NULL ) {
91
92 // First check if frame is complete and tester is reliable
93 // Unfortunately we can only check frame complete for runtime stubs and nmethod
94 // other generic buffer blobs are more problematic so we just assume they are
95 // ok. adapter blobs never have a frame complete and are never ok.
96
97 if (!_cb->is_frame_complete_at(_pc)) {
98 if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) {
99 return false;
100 }
101 }
102
103 // Could just be some random pointer within the codeBlob
104 if (!_cb->code_contains(_pc)) {
105 return false;
106 }
107
108 // Entry frame checks
109 if (is_entry_frame()) {
110 // an entry frame must have a valid fp.
111
112 if (!fp_safe) return false;
113
114 // Validate the JavaCallWrapper an entry frame must have
115
116 address jcw = (address)entry_frame_call_wrapper();
117
118 bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > fp);
119
120 return jcw_safe;
121
122 }
123
124 intptr_t* sender_sp = NULL;
125 intptr_t* sender_unextended_sp = NULL;
126 address sender_pc = NULL;
127 intptr_t* saved_fp = NULL;
128
129 if (is_interpreted_frame()) {
130 // fp must be safe
131 if (!fp_safe) {
132 return false;
133 }
134
135 sender_pc = (address) this->fp()[return_addr_offset];
136 // for interpreted frames, the value below is the sender "raw" sp,
137 // which can be different from the sender unextended sp (the sp seen
138 // by the sender) because of current frame local variables
139 sender_sp = (intptr_t*) addr_at(sender_sp_offset);
140 sender_unextended_sp = (intptr_t*) this->fp()[interpreter_frame_sender_sp_offset];
141 saved_fp = (intptr_t*) this->fp()[link_offset];
142
143 } else {
144 // must be some sort of compiled/runtime frame
145 // fp does not have to be safe (although it could be check for c1?)
146
147 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc
148 if (_cb->frame_size() <= 0) {
149 return false;
150 }
151
152 sender_sp = _unextended_sp + _cb->frame_size();
153 sender_unextended_sp = sender_sp;
154 // On Intel the return_address is always the word on the stack
155 sender_pc = (address) *(sender_sp-1);
156 // Note: frame::sender_sp_offset is only valid for compiled frame
157 saved_fp = (intptr_t*) *(sender_sp - frame::sender_sp_offset);
158 }
159
160
161 // If the potential sender is the interpreter then we can do some more checking
162 if (Interpreter::contains(sender_pc)) {
163
164 // ebp is always saved in a recognizable place in any code we generate. However
165 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp
166 // is really a frame pointer.
167
168 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp);
169
170 if (!saved_fp_safe) {
171 return false;
172 }
173
174 // construct the potential sender
175
176 frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc);
177
178 return sender.is_interpreted_frame_valid(thread);
179
180 }
181
182 // We must always be able to find a recognizable pc
183 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc);
184 if (sender_pc == NULL || sender_blob == NULL) {
185 return false;
186 }
187
188 // Could be a zombie method
189 if (sender_blob->is_zombie() || sender_blob->is_unloaded()) {
190 return false;
191 }
192
193 // Could just be some random pointer within the codeBlob
194 if (!sender_blob->code_contains(sender_pc)) {
195 return false;
196 }
197
198 // We should never be able to see an adapter if the current frame is something from code cache
199 if (sender_blob->is_adapter_blob()) {
200 return false;
201 }
202
203 // Could be the call_stub
204 if (StubRoutines::returns_to_call_stub(sender_pc)) {
205 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp);
206
207 if (!saved_fp_safe) {
208 return false;
209 }
210
211 // construct the potential sender
212
213 frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc);
214
215 // Validate the JavaCallWrapper an entry frame must have
216 address jcw = (address)sender.entry_frame_call_wrapper();
217
218 bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > (address)sender.fp());
219
220 return jcw_safe;
221 }
222
223 if (sender_blob->is_nmethod()) {
224 nmethod* nm = sender_blob->as_nmethod_or_null();
225 if (nm != NULL) {
226 if (nm->is_deopt_mh_entry(sender_pc) || nm->is_deopt_entry(sender_pc)) {
227 return false;
228 }
229 }
230 }
231
232 // If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size
233 // because the return address counts against the callee's frame.
234
235 if (sender_blob->frame_size() <= 0) {
236 assert(!sender_blob->is_nmethod(), "should count return address at least");
237 return false;
238 }
239
240 // We should never be able to see anything here except an nmethod. If something in the
241 // code cache (current frame) is called by an entity within the code cache that entity
242 // should not be anything but the call stub (already covered), the interpreter (already covered)
243 // or an nmethod.
244
245 if (!sender_blob->is_nmethod()) {
246 return false;
247 }
248
249 // Could put some more validation for the potential non-interpreted sender
250 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte...
251
252 // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb
253
254 // We've validated the potential sender that would be created
255 return true;
256 }
257
258 // Must be native-compiled frame. Since sender will try and use fp to find
259 // linkages it must be safe
260
261 if (!fp_safe) {
262 return false;
263 }
264
265 // Will the pc we fetch be non-zero (which we'll find at the oldest frame)
266
267 if ( (address) this->fp()[return_addr_offset] == NULL) return false;
268
269
270 // could try and do some more potential verification of native frame if we could think of some...
271
272 return true;
273
274 }
275
276
277 void frame::patch_pc(Thread* thread, address pc) {
278 address* pc_addr = &(((address*) sp())[-1]);
279 if (TracePcPatching) {
280 tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]",
281 p2i(pc_addr), p2i(*pc_addr), p2i(pc));
282 }
283 // Either the return address is the original one or we are going to
284 // patch in the same address that's already there.
285 assert(_pc == *pc_addr || pc == *pc_addr, "must be");
286 *pc_addr = pc;
287 _cb = CodeCache::find_blob(pc);
288 address original_pc = nmethod::get_deopt_original_pc(this);
289 if (original_pc != NULL) {
290 assert(original_pc == _pc, "expected original PC to be stored before patching");
291 _deopt_state = is_deoptimized;
292 // leave _pc as is
293 } else {
294 _deopt_state = not_deoptimized;
295 _pc = pc;
296 }
297 }
298
299 bool frame::is_interpreted_frame() const {
300 return Interpreter::contains(pc());
301 }
302
303 int frame::frame_size(RegisterMap* map) const {
304 frame sender = this->sender(map);
305 return sender.sp() - sp();
306 }
307
308 intptr_t* frame::entry_frame_argument_at(int offset) const {
309 // convert offset to index to deal with tsi
310 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
311 // Entry frame's arguments are always in relation to unextended_sp()
312 return &unextended_sp()[index];
313 }
314
315 // sender_sp
316
317 intptr_t* frame::interpreter_frame_sender_sp() const {
318 assert(is_interpreted_frame(), "interpreted frame expected");
319 return (intptr_t*) at(interpreter_frame_sender_sp_offset);
320 }
321
322 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) {
323 assert(is_interpreted_frame(), "interpreted frame expected");
324 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp);
325 }
326
327
328 // monitor elements
329
330 BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
331 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset);
332 }
333
334 BasicObjectLock* frame::interpreter_frame_monitor_end() const {
335 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset);
336 // make sure the pointer points inside the frame
337 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer");
338 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer");
339 return result;
340 }
341
342 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) {
343 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value;
344 }
345
346 // Used by template based interpreter deoptimization
347 void frame::interpreter_frame_set_last_sp(intptr_t* sp) {
348 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp;
349 }
350
351 frame frame::sender_for_entry_frame(RegisterMap* map) const {
352 assert(map != NULL, "map must be set");
353 // Java frame called from C; skip all C frames and return top C
354 // frame of that chunk as the sender
355 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
356 assert(!entry_frame_is_first(), "next Java fp must be non zero");
357 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack");
358 map->clear();
359 assert(map->include_argument_oops(), "should be set by clear");
360 if (jfa->last_Java_pc() != NULL ) {
361 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc());
362 return fr;
363 }
364 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp());
365 return fr;
366 }
367
368 //------------------------------------------------------------------------------
369 // frame::verify_deopt_original_pc
370 //
371 // Verifies the calculated original PC of a deoptimization PC for the
372 // given unextended SP.
373 #ifdef ASSERT
374 void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp) {
375 frame fr;
376
377 // This is ugly but it's better than to change {get,set}_original_pc
378 // to take an SP value as argument. And it's only a debugging
379 // method anyway.
380 fr._unextended_sp = unextended_sp;
381
382 address original_pc = nm->get_original_pc(&fr);
383 assert(nm->insts_contains(original_pc), "original PC must be in nmethod");
384 }
385 #endif
386
387 //------------------------------------------------------------------------------
388 // frame::adjust_unextended_sp
389 void frame::adjust_unextended_sp() {
390 // On x86, sites calling method handle intrinsics and lambda forms are treated
391 // as any other call site. Therefore, no special action is needed when we are
392 // returning to any of these call sites.
393
394 nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null();
395 if (sender_nm != NULL) {
396 // If the sender PC is a deoptimization point, get the original PC.
397 if (sender_nm->is_deopt_entry(_pc) ||
398 sender_nm->is_deopt_mh_entry(_pc)) {
399 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp));
400 }
401 }
402 }
403
404 //------------------------------------------------------------------------------
405 // frame::update_map_with_saved_link
406 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) {
407 // The interpreter and compiler(s) always save EBP/RBP in a known
408 // location on entry. We must record where that location is
409 // so this if EBP/RBP was live on callout from c2 we can find
410 // the saved copy no matter what it called.
411
412 // Since the interpreter always saves EBP/RBP if we record where it is then
413 // we don't have to always save EBP/RBP on entry and exit to c2 compiled
414 // code, on entry will be enough.
415 map->set_location(rbp->as_VMReg(), (address) link_addr);
416 #ifdef AMD64
417 // this is weird "H" ought to be at a higher address however the
418 // oopMaps seems to have the "H" regs at the same address and the
419 // vanilla register.
420 // XXXX make this go away
421 if (true) {
422 map->set_location(rbp->as_VMReg()->next(), (address) link_addr);
423 }
424 #endif // AMD64
425 }
426
427
428 //------------------------------------------------------------------------------
429 // frame::sender_for_interpreter_frame
430 frame frame::sender_for_interpreter_frame(RegisterMap* map) const {
431 // SP is the raw SP from the sender after adapter or interpreter
432 // extension.
433 intptr_t* sender_sp = this->sender_sp();
434
435 // This is the sp before any possible extension (adapter/locals).
436 intptr_t* unextended_sp = interpreter_frame_sender_sp();
437
438 #if defined(COMPILER2) || INCLUDE_JVMCI
439 if (map->update_map()) {
440 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset));
441 }
442 #endif // COMPILER2 || INCLUDE_JVMCI
443
444 return frame(sender_sp, unextended_sp, link(), sender_pc());
445 }
446
447
448 //------------------------------------------------------------------------------
449 // frame::sender_for_compiled_frame
450 frame frame::sender_for_compiled_frame(RegisterMap* map) const {
451 assert(map != NULL, "map must be set");
452
453 // frame owned by optimizing compiler
454 assert(_cb->frame_size() >= 0, "must have non-zero frame size");
455 intptr_t* sender_sp = unextended_sp() + _cb->frame_size();
456 intptr_t* unextended_sp = sender_sp;
457
458 // On Intel the return_address is always the word on the stack
459 address sender_pc = (address) *(sender_sp-1);
460
461 // This is the saved value of EBP which may or may not really be an FP.
462 // It is only an FP if the sender is an interpreter frame (or C1?).
463 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset);
464
465 if (map->update_map()) {
466 // Tell GC to use argument oopmaps for some runtime stubs that need it.
467 // For C1, the runtime stub might not have oop maps, so set this flag
468 // outside of update_register_map.
469 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));
470 if (_cb->oop_maps() != NULL) {
471 OopMapSet::update_register_map(this, map);
472 }
473
474 // Since the prolog does the save and restore of EBP there is no oopmap
475 // for it so we must fill in its location as if there was an oopmap entry
476 // since if our caller was compiled code there could be live jvm state in it.
477 update_map_with_saved_link(map, saved_fp_addr);
478 }
479
480 assert(sender_sp != sp(), "must have changed");
481 return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc);
482 }
483
484
485 //------------------------------------------------------------------------------
486 // frame::sender
487 frame frame::sender(RegisterMap* map) const {
488 // Default is we done have to follow them. The sender_for_xxx will
489 // update it accordingly
490 map->set_include_argument_oops(false);
491
492 if (is_entry_frame()) return sender_for_entry_frame(map);
493 if (is_interpreted_frame()) return sender_for_interpreter_frame(map);
494 assert(_cb == CodeCache::find_blob(pc()),"Must be the same");
495
496 if (_cb != NULL) {
497 return sender_for_compiled_frame(map);
498 }
499 // Must be native-compiled frame, i.e. the marshaling code for native
500 // methods that exists in the core system.
501 return frame(sender_sp(), link(), sender_pc());
502 }
503
504 bool frame::is_interpreted_frame_valid(JavaThread* thread) const {
505 assert(is_interpreted_frame(), "Not an interpreted frame");
506 // These are reasonable sanity checks
507 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) {
508 return false;
509 }
510 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) {
511 return false;
512 }
513 if (fp() + interpreter_frame_initial_sp_offset < sp()) {
514 return false;
515 }
516 // These are hacks to keep us out of trouble.
517 // The problem with these is that they mask other problems
518 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above
519 return false;
520 }
521
522 // do some validation of frame elements
523 // first the method
524
525 Method* m = *interpreter_frame_method_addr();
526
527 // validate the method we'd find in this potential sender
528 if (!m->is_valid_method()) return false;
529
530 // stack frames shouldn't be much larger than max_stack elements
531 // this test requires the use the unextended_sp which is the sp as seen by
532 // the current frame, and not sp which is the "raw" pc which could point
533 // further because of local variables of the callee method inserted after
534 // method arguments
535 if (fp() - unextended_sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) {
536 return false;
537 }
538
539 // validate bci/bcp
540
541 address bcp = interpreter_frame_bcp();
542 if (m->validate_bci_from_bcp(bcp) < 0) {
543 return false;
544 }
545
546 // validate ConstantPoolCache*
547 ConstantPoolCache* cp = *interpreter_frame_cache_addr();
548 if (cp == NULL || !cp->is_metaspace_object()) return false;
549
550 // validate locals
551
552 address locals = (address) *interpreter_frame_locals_addr();
553
554 if (locals > thread->stack_base() || locals < (address) fp()) return false;
555
556 // We'd have to be pretty unlucky to be mislead at this point
557 return true;
558 }
559
560 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {
561 assert(is_interpreted_frame(), "interpreted frame expected");
562 Method* method = interpreter_frame_method();
563 BasicType type = method->result_type();
564
565 intptr_t* tos_addr;
566 if (method->is_native()) {
567 // Prior to calling into the runtime to report the method_exit the possible
568 // return value is pushed to the native stack. If the result is a jfloat/jdouble
569 // then ST0 is saved before EAX/EDX. See the note in generate_native_result
570 tos_addr = (intptr_t*)sp();
571 if (type == T_FLOAT || type == T_DOUBLE) {
572 // QQQ seems like this code is equivalent on the two platforms
573 #ifdef AMD64
574 // This is times two because we do a push(ltos) after pushing XMM0
575 // and that takes two interpreter stack slots.
576 tos_addr += 2 * Interpreter::stackElementWords;
577 #else
578 tos_addr += 2;
579 #endif // AMD64
580 }
581 } else {
582 tos_addr = (intptr_t*)interpreter_frame_tos_address();
583 }
584
585 switch (type) {
586 case T_OBJECT :
587 case T_ARRAY : {
588 oop obj;
589 if (method->is_native()) {
590 obj = cast_to_oop(at(interpreter_frame_oop_temp_offset));
591 } else {
592 oop* obj_p = (oop*)tos_addr;
593 obj = (obj_p == NULL) ? (oop)NULL : *obj_p;
594 }
595 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
596 *oop_result = obj;
597 break;
598 }
599 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break;
600 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break;
601 case T_CHAR : value_result->c = *(jchar*)tos_addr; break;
602 case T_SHORT : value_result->s = *(jshort*)tos_addr; break;
603 case T_INT : value_result->i = *(jint*)tos_addr; break;
604 case T_LONG : value_result->j = *(jlong*)tos_addr; break;
605 case T_FLOAT : {
606 #ifdef AMD64
607 value_result->f = *(jfloat*)tos_addr;
608 #else
609 if (method->is_native()) {
610 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat
611 value_result->f = (jfloat)d;
612 } else {
613 value_result->f = *(jfloat*)tos_addr;
614 }
615 #endif // AMD64
616 break;
617 }
618 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break;
619 case T_VOID : /* Nothing to do */ break;
620 default : ShouldNotReachHere();
621 }
622
623 return type;
624 }
625
626
627 intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
628 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
629 return &interpreter_frame_tos_address()[index];
630 }
631
632 #ifndef PRODUCT
633
634 #define DESCRIBE_FP_OFFSET(name) \
635 values.describe(frame_no, fp() + frame::name##_offset, #name)
636
637 void frame::describe_pd(FrameValues& values, int frame_no) {
638 if (is_interpreted_frame()) {
639 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp);
640 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp);
641 DESCRIBE_FP_OFFSET(interpreter_frame_method);
642 DESCRIBE_FP_OFFSET(interpreter_frame_mdp);
643 DESCRIBE_FP_OFFSET(interpreter_frame_cache);
644 DESCRIBE_FP_OFFSET(interpreter_frame_locals);
645 DESCRIBE_FP_OFFSET(interpreter_frame_bcp);
646 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp);
647 #ifdef AMD64
648 } else if (is_entry_frame()) {
649 // This could be more descriptive if we use the enum in
650 // stubGenerator to map to real names but it's most important to
651 // claim these frame slots so the error checking works.
652 for (int i = 0; i < entry_frame_after_call_words; i++) {
653 values.describe(frame_no, fp() - i, err_msg("call_stub word fp - %d", i));
654 }
655 #endif // AMD64
656 }
657 }
658 #endif // !PRODUCT
659
660 intptr_t *frame::initial_deoptimization_info() {
661 // used to reset the saved FP
662 return fp();
663 }
664
665 intptr_t* frame::real_fp() const {
666 if (_cb != NULL) {
667 // use the frame size if valid
668 int size = _cb->frame_size();
669 if (size > 0) {
670 return unextended_sp() + size;
671 }
672 }
673 // else rely on fp()
674 assert(! is_compiled_frame(), "unknown compiled frame size");
675 return fp();
676 }
677
678 #ifndef PRODUCT
679 // This is a generic constructor which is only used by pns() in debug.cpp.
680 frame::frame(void* sp, void* fp, void* pc) {
681 init((intptr_t*)sp, (intptr_t*)fp, (address)pc);
682 }
683 #endif