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