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 nm->method()->is_method_handle_intrinsic()) {
228 return false;
229 }
230 }
231 }
232
233 // If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size
234 // because the return address counts against the callee's frame.
235
236 if (sender_blob->frame_size() <= 0) {
237 assert(!sender_blob->is_nmethod(), "should count return address at least");
238 return false;
239 }
240
241 // We should never be able to see anything here except an nmethod. If something in the
242 // code cache (current frame) is called by an entity within the code cache that entity
243 // should not be anything but the call stub (already covered), the interpreter (already covered)
244 // or an nmethod.
245
246 if (!sender_blob->is_nmethod()) {
247 return false;
248 }
249
250 // Could put some more validation for the potential non-interpreted sender
251 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte...
252
253 // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb
254
255 // We've validated the potential sender that would be created
256 return true;
257 }
258
259 // Must be native-compiled frame. Since sender will try and use fp to find
260 // linkages it must be safe
261
262 if (!fp_safe) {
263 return false;
264 }
265
266 // Will the pc we fetch be non-zero (which we'll find at the oldest frame)
267
268 if ( (address) this->fp()[return_addr_offset] == NULL) return false;
269
270
271 // could try and do some more potential verification of native frame if we could think of some...
272
273 return true;
274
275 }
276
277
278 void frame::patch_pc(Thread* thread, address pc) {
279 address* pc_addr = &(((address*) sp())[-1]);
280 if (TracePcPatching) {
281 tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]",
282 p2i(pc_addr), p2i(*pc_addr), p2i(pc));
283 }
284 // Either the return address is the original one or we are going to
285 // patch in the same address that's already there.
286 assert(_pc == *pc_addr || pc == *pc_addr, "must be");
287 *pc_addr = pc;
288 _cb = CodeCache::find_blob(pc);
289 address original_pc = nmethod::get_deopt_original_pc(this);
290 if (original_pc != NULL) {
291 assert(original_pc == _pc, "expected original PC to be stored before patching");
292 _deopt_state = is_deoptimized;
293 // leave _pc as is
294 } else {
295 _deopt_state = not_deoptimized;
296 _pc = pc;
297 }
298 }
299
300 bool frame::is_interpreted_frame() const {
301 return Interpreter::contains(pc());
302 }
303
304 int frame::frame_size(RegisterMap* map) const {
305 frame sender = this->sender(map);
306 return sender.sp() - sp();
307 }
308
309 intptr_t* frame::entry_frame_argument_at(int offset) const {
310 // convert offset to index to deal with tsi
311 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
312 // Entry frame's arguments are always in relation to unextended_sp()
313 return &unextended_sp()[index];
314 }
315
316 // sender_sp
317
318 intptr_t* frame::interpreter_frame_sender_sp() const {
319 assert(is_interpreted_frame(), "interpreted frame expected");
320 return (intptr_t*) at(interpreter_frame_sender_sp_offset);
321 }
322
323 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) {
324 assert(is_interpreted_frame(), "interpreted frame expected");
325 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp);
326 }
327
328
329 // monitor elements
330
331 BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
332 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset);
333 }
334
335 BasicObjectLock* frame::interpreter_frame_monitor_end() const {
336 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset);
337 // make sure the pointer points inside the frame
338 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer");
339 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer");
340 return result;
341 }
342
343 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) {
344 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value;
345 }
346
347 // Used by template based interpreter deoptimization
348 void frame::interpreter_frame_set_last_sp(intptr_t* sp) {
349 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp;
350 }
351
352 frame frame::sender_for_entry_frame(RegisterMap* map) const {
353 assert(map != NULL, "map must be set");
354 // Java frame called from C; skip all C frames and return top C
355 // frame of that chunk as the sender
356 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
357 assert(!entry_frame_is_first(), "next Java fp must be non zero");
358 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack");
359 map->clear();
360 assert(map->include_argument_oops(), "should be set by clear");
361 if (jfa->last_Java_pc() != NULL ) {
362 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc());
363 return fr;
364 }
365 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp());
366 return fr;
367 }
368
369 //------------------------------------------------------------------------------
370 // frame::verify_deopt_original_pc
371 //
372 // Verifies the calculated original PC of a deoptimization PC for the
373 // given unextended SP.
374 #ifdef ASSERT
375 void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp) {
376 frame fr;
377
378 // This is ugly but it's better than to change {get,set}_original_pc
379 // to take an SP value as argument. And it's only a debugging
380 // method anyway.
381 fr._unextended_sp = unextended_sp;
382
383 address original_pc = nm->get_original_pc(&fr);
384 assert(nm->insts_contains(original_pc), "original PC must be in nmethod");
385 }
386 #endif
387
388 //------------------------------------------------------------------------------
389 // frame::adjust_unextended_sp
390 void frame::adjust_unextended_sp() {
391 // On x86, sites calling method handle intrinsics and lambda forms are treated
392 // as any other call site. Therefore, no special action is needed when we are
393 // returning to any of these call sites.
394
395 nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null();
396 if (sender_nm != NULL) {
397 // If the sender PC is a deoptimization point, get the original PC.
398 if (sender_nm->is_deopt_entry(_pc) ||
399 sender_nm->is_deopt_mh_entry(_pc)) {
400 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp));
401 }
402 }
403 }
404
405 //------------------------------------------------------------------------------
406 // frame::update_map_with_saved_link
407 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) {
408 // The interpreter and compiler(s) always save EBP/RBP in a known
409 // location on entry. We must record where that location is
410 // so this if EBP/RBP was live on callout from c2 we can find
411 // the saved copy no matter what it called.
412
413 // Since the interpreter always saves EBP/RBP if we record where it is then
414 // we don't have to always save EBP/RBP on entry and exit to c2 compiled
415 // code, on entry will be enough.
416 map->set_location(rbp->as_VMReg(), (address) link_addr);
417 #ifdef AMD64
418 // this is weird "H" ought to be at a higher address however the
419 // oopMaps seems to have the "H" regs at the same address and the
420 // vanilla register.
421 // XXXX make this go away
422 if (true) {
423 map->set_location(rbp->as_VMReg()->next(), (address) link_addr);
424 }
425 #endif // AMD64
426 }
427
428
429 //------------------------------------------------------------------------------
430 // frame::sender_for_interpreter_frame
431 frame frame::sender_for_interpreter_frame(RegisterMap* map) const {
432 // SP is the raw SP from the sender after adapter or interpreter
433 // extension.
434 intptr_t* sender_sp = this->sender_sp();
435
436 // This is the sp before any possible extension (adapter/locals).
437 intptr_t* unextended_sp = interpreter_frame_sender_sp();
438
439 #if defined(COMPILER2) || INCLUDE_JVMCI
440 if (map->update_map()) {
441 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset));
442 }
443 #endif // COMPILER2 || INCLUDE_JVMCI
444
445 return frame(sender_sp, unextended_sp, link(), sender_pc());
446 }
447
448
449 //------------------------------------------------------------------------------
450 // frame::sender_for_compiled_frame
451 frame frame::sender_for_compiled_frame(RegisterMap* map) const {
452 assert(map != NULL, "map must be set");
453
454 // frame owned by optimizing compiler
455 assert(_cb->frame_size() >= 0, "must have non-zero frame size");
456 intptr_t* sender_sp = unextended_sp() + _cb->frame_size();
457 intptr_t* unextended_sp = sender_sp;
458
459 // On Intel the return_address is always the word on the stack
460 address sender_pc = (address) *(sender_sp-1);
461
462 // This is the saved value of EBP which may or may not really be an FP.
463 // It is only an FP if the sender is an interpreter frame (or C1?).
464 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset);
465
466 if (map->update_map()) {
467 // Tell GC to use argument oopmaps for some runtime stubs that need it.
468 // For C1, the runtime stub might not have oop maps, so set this flag
469 // outside of update_register_map.
470 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));
471 if (_cb->oop_maps() != NULL) {
472 OopMapSet::update_register_map(this, map);
473 }
474
475 // Since the prolog does the save and restore of EBP there is no oopmap
476 // for it so we must fill in its location as if there was an oopmap entry
477 // since if our caller was compiled code there could be live jvm state in it.
478 update_map_with_saved_link(map, saved_fp_addr);
479 }
480
481 assert(sender_sp != sp(), "must have changed");
482 return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc);
483 }
484
485
486 //------------------------------------------------------------------------------
487 // frame::sender
488 frame frame::sender(RegisterMap* map) const {
489 // Default is we done have to follow them. The sender_for_xxx will
490 // update it accordingly
491 map->set_include_argument_oops(false);
492
493 if (is_entry_frame()) return sender_for_entry_frame(map);
494 if (is_interpreted_frame()) return sender_for_interpreter_frame(map);
495 assert(_cb == CodeCache::find_blob(pc()),"Must be the same");
496
497 if (_cb != NULL) {
498 return sender_for_compiled_frame(map);
499 }
500 // Must be native-compiled frame, i.e. the marshaling code for native
501 // methods that exists in the core system.
502 return frame(sender_sp(), link(), sender_pc());
503 }
504
505 bool frame::is_interpreted_frame_valid(JavaThread* thread) const {
506 assert(is_interpreted_frame(), "Not an interpreted frame");
507 // These are reasonable sanity checks
508 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) {
509 return false;
510 }
511 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) {
512 return false;
513 }
514 if (fp() + interpreter_frame_initial_sp_offset < sp()) {
515 return false;
516 }
517 // These are hacks to keep us out of trouble.
518 // The problem with these is that they mask other problems
519 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above
520 return false;
521 }
522
523 // do some validation of frame elements
524 // first the method
525
526 Method* m = *interpreter_frame_method_addr();
527
528 // validate the method we'd find in this potential sender
529 if (!m->is_valid_method()) return false;
530
531 // stack frames shouldn't be much larger than max_stack elements
532 // this test requires the use the unextended_sp which is the sp as seen by
533 // the current frame, and not sp which is the "raw" pc which could point
534 // further because of local variables of the callee method inserted after
535 // method arguments
536 if (fp() - unextended_sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) {
537 return false;
538 }
539
540 // validate bci/bcp
541
542 address bcp = interpreter_frame_bcp();
543 if (m->validate_bci_from_bcp(bcp) < 0) {
544 return false;
545 }
546
547 // validate ConstantPoolCache*
548 ConstantPoolCache* cp = *interpreter_frame_cache_addr();
549 if (cp == NULL || !cp->is_metaspace_object()) return false;
550
551 // validate locals
552
553 address locals = (address) *interpreter_frame_locals_addr();
554
555 if (locals > thread->stack_base() || locals < (address) fp()) return false;
556
557 // We'd have to be pretty unlucky to be mislead at this point
558 return true;
559 }
560
561 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {
562 assert(is_interpreted_frame(), "interpreted frame expected");
563 Method* method = interpreter_frame_method();
564 BasicType type = method->result_type();
565
566 intptr_t* tos_addr;
567 if (method->is_native()) {
568 // Prior to calling into the runtime to report the method_exit the possible
569 // return value is pushed to the native stack. If the result is a jfloat/jdouble
570 // then ST0 is saved before EAX/EDX. See the note in generate_native_result
571 tos_addr = (intptr_t*)sp();
572 if (type == T_FLOAT || type == T_DOUBLE) {
573 // QQQ seems like this code is equivalent on the two platforms
574 #ifdef AMD64
575 // This is times two because we do a push(ltos) after pushing XMM0
576 // and that takes two interpreter stack slots.
577 tos_addr += 2 * Interpreter::stackElementWords;
578 #else
579 tos_addr += 2;
580 #endif // AMD64
581 }
582 } else {
583 tos_addr = (intptr_t*)interpreter_frame_tos_address();
584 }
585
586 switch (type) {
587 case T_OBJECT :
588 case T_ARRAY : {
589 oop obj;
590 if (method->is_native()) {
591 obj = cast_to_oop(at(interpreter_frame_oop_temp_offset));
592 } else {
593 oop* obj_p = (oop*)tos_addr;
594 obj = (obj_p == NULL) ? (oop)NULL : *obj_p;
595 }
596 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
597 *oop_result = obj;
598 break;
599 }
600 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break;
601 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break;
602 case T_CHAR : value_result->c = *(jchar*)tos_addr; break;
603 case T_SHORT : value_result->s = *(jshort*)tos_addr; break;
604 case T_INT : value_result->i = *(jint*)tos_addr; break;
605 case T_LONG : value_result->j = *(jlong*)tos_addr; break;
606 case T_FLOAT : {
607 #ifdef AMD64
608 value_result->f = *(jfloat*)tos_addr;
609 #else
610 if (method->is_native()) {
611 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat
612 value_result->f = (jfloat)d;
613 } else {
614 value_result->f = *(jfloat*)tos_addr;
615 }
616 #endif // AMD64
617 break;
618 }
619 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break;
620 case T_VOID : /* Nothing to do */ break;
621 default : ShouldNotReachHere();
622 }
623
624 return type;
625 }
626
627
628 intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
629 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
630 return &interpreter_frame_tos_address()[index];
631 }
632
633 #ifndef PRODUCT
634
635 #define DESCRIBE_FP_OFFSET(name) \
636 values.describe(frame_no, fp() + frame::name##_offset, #name)
637
638 void frame::describe_pd(FrameValues& values, int frame_no) {
639 if (is_interpreted_frame()) {
640 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp);
641 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp);
642 DESCRIBE_FP_OFFSET(interpreter_frame_method);
643 DESCRIBE_FP_OFFSET(interpreter_frame_mdp);
644 DESCRIBE_FP_OFFSET(interpreter_frame_cache);
645 DESCRIBE_FP_OFFSET(interpreter_frame_locals);
646 DESCRIBE_FP_OFFSET(interpreter_frame_bcp);
647 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp);
648 #ifdef AMD64
649 } else if (is_entry_frame()) {
650 // This could be more descriptive if we use the enum in
651 // stubGenerator to map to real names but it's most important to
652 // claim these frame slots so the error checking works.
653 for (int i = 0; i < entry_frame_after_call_words; i++) {
654 values.describe(frame_no, fp() - i, err_msg("call_stub word fp - %d", i));
655 }
656 #endif // AMD64
657 }
658 }
659 #endif // !PRODUCT
660
661 intptr_t *frame::initial_deoptimization_info() {
662 // used to reset the saved FP
663 return fp();
664 }
665
666 intptr_t* frame::real_fp() const {
667 if (_cb != NULL) {
668 // use the frame size if valid
669 int size = _cb->frame_size();
670 if (size > 0) {
671 return unextended_sp() + size;
672 }
673 }
674 // else rely on fp()
675 assert(! is_compiled_frame(), "unknown compiled frame size");
676 return fp();
677 }
678
679 #ifndef PRODUCT
680 // This is a generic constructor which is only used by pns() in debug.cpp.
681 frame::frame(void* sp, void* fp, void* pc) {
682 init((intptr_t*)sp, (intptr_t*)fp, (address)pc);
683 }
684 #endif