1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "oops/markOop.hpp"
30 #include "oops/method.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "prims/methodHandles.hpp"
33 #include "runtime/frame.inline.hpp"
34 #include "runtime/handles.inline.hpp"
35 #include "runtime/javaCalls.hpp"
36 #include "runtime/monitorChunk.hpp"
37 #include "runtime/os.hpp"
38 #include "runtime/signature.hpp"
39 #include "runtime/stubCodeGenerator.hpp"
40 #include "runtime/stubRoutines.hpp"
41 #include "vmreg_aarch64.inline.hpp"
42 #ifdef COMPILER1
43 #include "c1/c1_Runtime1.hpp"
44 #include "runtime/vframeArray.hpp"
45 #endif
46
47 #ifdef ASSERT
48 void RegisterMap::check_location_valid() {
49 }
50 #endif
51
52
53 // Profiling/safepoint support
54
55 bool frame::safe_for_sender(JavaThread *thread) {
56 address sp = (address)_sp;
57 address fp = (address)_fp;
58 address unextended_sp = (address)_unextended_sp;
59
60 // consider stack guards when trying to determine "safe" stack pointers
61 static size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0;
62 size_t usable_stack_size = thread->stack_size() - stack_guard_size;
63
64 // sp must be within the usable part of the stack (not in guards)
65 bool sp_safe = (sp < thread->stack_base()) &&
66 (sp >= thread->stack_base() - usable_stack_size);
67
68
69 if (!sp_safe) {
70 return false;
71 }
72
73 // unextended sp must be within the stack and above or equal sp
74 bool unextended_sp_safe = (unextended_sp < thread->stack_base()) &&
75 (unextended_sp >= sp);
76
77 if (!unextended_sp_safe) {
78 return false;
79 }
80
81 // an fp must be within the stack and above (but not equal) sp
82 // second evaluation on fp+ is added to handle situation where fp is -1
83 bool fp_safe = (fp < thread->stack_base() && (fp > sp) && (((fp + (return_addr_offset * sizeof(void*))) < thread->stack_base())));
84
85 // We know sp/unextended_sp are safe only fp is questionable here
86
87 // If the current frame is known to the code cache then we can attempt to
88 // to construct the sender and do some validation of it. This goes a long way
89 // toward eliminating issues when we get in frame construction code
90
91 if (_cb != NULL ) {
92
93 // First check if frame is complete and tester is reliable
94 // Unfortunately we can only check frame complete for runtime stubs and nmethod
95 // other generic buffer blobs are more problematic so we just assume they are
96 // ok. adapter blobs never have a frame complete and are never ok.
97
98 if (!_cb->is_frame_complete_at(_pc)) {
99 if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) {
100 return false;
101 }
102 }
103
104 // Could just be some random pointer within the codeBlob
105 if (!_cb->code_contains(_pc)) {
106 return false;
107 }
108
109 // Entry frame checks
110 if (is_entry_frame()) {
111 // an entry frame must have a valid fp.
112
113 if (!fp_safe) return false;
114
115 // Validate the JavaCallWrapper an entry frame must have
116
117 address jcw = (address)entry_frame_call_wrapper();
118
119 bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > fp);
120
121 return jcw_safe;
122
123 }
124
125 intptr_t* sender_sp = NULL;
126 intptr_t* sender_unextended_sp = NULL;
127 address sender_pc = NULL;
128 intptr_t* saved_fp = NULL;
129
130 if (is_interpreted_frame()) {
131 // fp must be safe
132 if (!fp_safe) {
133 return false;
134 }
135
136 sender_pc = (address) this->fp()[return_addr_offset];
137 // for interpreted frames, the value below is the sender "raw" sp,
138 // which can be different from the sender unextended sp (the sp seen
139 // by the sender) because of current frame local variables
140 sender_sp = (intptr_t*) addr_at(sender_sp_offset);
141 sender_unextended_sp = (intptr_t*) this->fp()[interpreter_frame_sender_sp_offset];
142 saved_fp = (intptr_t*) this->fp()[link_offset];
143
144 } else {
145 // must be some sort of compiled/runtime frame
146 // fp does not have to be safe (although it could be check for c1?)
147
148 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc
149 if (_cb->frame_size() <= 0) {
150 return false;
151 }
152
153 sender_sp = _unextended_sp + _cb->frame_size();
154 sender_unextended_sp = sender_sp;
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 // fp 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 fp
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 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 #ifdef CC_INTERP
317 intptr_t* frame::interpreter_frame_sender_sp() const {
318 assert(is_interpreted_frame(), "interpreted frame expected");
319 // QQQ why does this specialize method exist if frame::sender_sp() does same thing?
320 // seems odd and if we always know interpreted vs. non then sender_sp() is really
321 // doing too much work.
322 return get_interpreterState()->sender_sp();
323 }
324
325 // monitor elements
326
327 BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
328 return get_interpreterState()->monitor_base();
329 }
330
331 BasicObjectLock* frame::interpreter_frame_monitor_end() const {
332 return (BasicObjectLock*) get_interpreterState()->stack_base();
333 }
334
335 #else // CC_INTERP
336
337 intptr_t* frame::interpreter_frame_sender_sp() const {
338 assert(is_interpreted_frame(), "interpreted frame expected");
339 return (intptr_t*) at(interpreter_frame_sender_sp_offset);
340 }
341
342 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) {
343 assert(is_interpreted_frame(), "interpreted frame expected");
344 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp);
345 }
346
347
348 // monitor elements
349
350 BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
351 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset);
352 }
353
354 BasicObjectLock* frame::interpreter_frame_monitor_end() const {
355 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset);
356 // make sure the pointer points inside the frame
357 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer");
358 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer");
359 return result;
360 }
361
362 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) {
363 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value;
364 }
365
366 // Used by template based interpreter deoptimization
367 void frame::interpreter_frame_set_last_sp(intptr_t* sp) {
368 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp;
369 }
370 #endif // CC_INTERP
371
372 frame frame::sender_for_entry_frame(RegisterMap* map) const {
373 assert(map != NULL, "map must be set");
374 // Java frame called from C; skip all C frames and return top C
375 // frame of that chunk as the sender
376 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
377 assert(!entry_frame_is_first(), "next Java fp must be non zero");
378 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack");
379 map->clear();
380 assert(map->include_argument_oops(), "should be set by clear");
381 if (jfa->last_Java_pc() != NULL ) {
382 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc());
383 return fr;
384 }
385 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp());
386 return fr;
387 }
388
389 //------------------------------------------------------------------------------
390 // frame::verify_deopt_original_pc
391 //
392 // Verifies the calculated original PC of a deoptimization PC for the
393 // given unextended SP.
394 #ifdef ASSERT
395 void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp) {
396 frame fr;
397
398 // This is ugly but it's better than to change {get,set}_original_pc
399 // to take an SP value as argument. And it's only a debugging
400 // method anyway.
401 fr._unextended_sp = unextended_sp;
402
403 address original_pc = nm->get_original_pc(&fr);
404 assert(nm->insts_contains(original_pc), "original PC must be in nmethod");
405 }
406 #endif
407
408 //------------------------------------------------------------------------------
409 // frame::adjust_unextended_sp
410 void frame::adjust_unextended_sp() {
411 // On aarch64, sites calling method handle intrinsics and lambda forms are treated
412 // as any other call site. Therefore, no special action is needed when we are
413 // returning to any of these call sites.
414
415 nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null();
416 if (sender_nm != NULL) {
417 // If the sender PC is a deoptimization point, get the original PC.
418 if (sender_nm->is_deopt_entry(_pc) ||
419 sender_nm->is_deopt_mh_entry(_pc)) {
420 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp));
421 }
422 }
423 }
424
425 //------------------------------------------------------------------------------
426 // frame::update_map_with_saved_link
427 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) {
428 // The interpreter and compiler(s) always save fp in a known
429 // location on entry. We must record where that location is
430 // so that if fp was live on callout from c2 we can find
431 // the saved copy no matter what it called.
432
433 // Since the interpreter always saves fp if we record where it is then
434 // we don't have to always save fp on entry and exit to c2 compiled
435 // code, on entry will be enough.
436 map->set_location(rfp->as_VMReg(), (address) link_addr);
437 // this is weird "H" ought to be at a higher address however the
438 // oopMaps seems to have the "H" regs at the same address and the
439 // vanilla register.
440 // XXXX make this go away
441 if (true) {
442 map->set_location(rfp->as_VMReg()->next(), (address) link_addr);
443 }
444 }
445
446
447 //------------------------------------------------------------------------------
448 // frame::sender_for_interpreter_frame
449 frame frame::sender_for_interpreter_frame(RegisterMap* map) const {
450 // SP is the raw SP from the sender after adapter or interpreter
451 // extension.
452 intptr_t* sender_sp = this->sender_sp();
453
454 // This is the sp before any possible extension (adapter/locals).
455 intptr_t* unextended_sp = interpreter_frame_sender_sp();
456
457 #ifdef COMPILER2
458 if (map->update_map()) {
459 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset));
460 }
461 #endif // COMPILER2
462
463 return frame(sender_sp, unextended_sp, link(), sender_pc());
464 }
465
466
467 //------------------------------------------------------------------------------
468 // frame::sender_for_compiled_frame
469 frame frame::sender_for_compiled_frame(RegisterMap* map) const {
470 // we cannot rely upon the last fp having been saved to the thread
471 // in C2 code but it will have been pushed onto the stack. so we
472 // have to find it relative to the unextended sp
473
474 assert(_cb->frame_size() >= 0, "must have non-zero frame size");
475 intptr_t* l_sender_sp = unextended_sp() + _cb->frame_size();
476 intptr_t* unextended_sp = l_sender_sp;
477
478 // the return_address is always the word on the stack
479 address sender_pc = (address) *(l_sender_sp-1);
480
481 intptr_t** saved_fp_addr = (intptr_t**) (l_sender_sp - frame::sender_sp_offset);
482
483 // assert (sender_sp() == l_sender_sp, "should be");
484 // assert (*saved_fp_addr == link(), "should be");
485
486 if (map->update_map()) {
487 // Tell GC to use argument oopmaps for some runtime stubs that need it.
488 // For C1, the runtime stub might not have oop maps, so set this flag
489 // outside of update_register_map.
490 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));
491 if (_cb->oop_maps() != NULL) {
492 OopMapSet::update_register_map(this, map);
493 }
494
495 // Since the prolog does the save and restore of FP there is no
496 // oopmap for it so we must fill in its location as if there was
497 // an oopmap entry since if our caller was compiled code there
498 // could be live jvm state in it.
499 update_map_with_saved_link(map, saved_fp_addr);
500 }
501
502 return frame(l_sender_sp, unextended_sp, *saved_fp_addr, sender_pc);
503 }
504
505 //------------------------------------------------------------------------------
506 // frame::sender
507 frame frame::sender(RegisterMap* map) const {
508 // Default is we done have to follow them. The sender_for_xxx will
509 // update it accordingly
510 map->set_include_argument_oops(false);
511
512 if (is_entry_frame())
513 return sender_for_entry_frame(map);
514 if (is_interpreted_frame())
515 return sender_for_interpreter_frame(map);
516 assert(_cb == CodeCache::find_blob(pc()),"Must be the same");
517
518 // This test looks odd: why is it not is_compiled_frame() ? That's
519 // because stubs also have OOP maps.
520 if (_cb != NULL) {
521 return sender_for_compiled_frame(map);
522 }
523
524 // Must be native-compiled frame, i.e. the marshaling code for native
525 // methods that exists in the core system.
526 return frame(sender_sp(), link(), sender_pc());
527 }
528
529 bool frame::is_interpreted_frame_valid(JavaThread* thread) const {
530 // QQQ
531 #ifdef CC_INTERP
532 #else
533 assert(is_interpreted_frame(), "Not an interpreted frame");
534 // These are reasonable sanity checks
535 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) {
536 return false;
537 }
538 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) {
539 return false;
540 }
541 if (fp() + interpreter_frame_initial_sp_offset < sp()) {
542 return false;
543 }
544 // These are hacks to keep us out of trouble.
545 // The problem with these is that they mask other problems
546 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above
547 return false;
548 }
549
550 // do some validation of frame elements
551
552 // first the method
553
554 Method* m = *interpreter_frame_method_addr();
555
556 // validate the method we'd find in this potential sender
557 if (!m->is_valid_method()) return false;
558
559 // stack frames shouldn't be much larger than max_stack elements
560 // this test requires the use of unextended_sp which is the sp as seen by
561 // the current frame, and not sp which is the "raw" pc which could point
562 // further because of local variables of the callee method inserted after
563 // method arguments
564 if (fp() - unextended_sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) {
565 return false;
566 }
567
568 // validate bci/bcx
569
570 address bcp = interpreter_frame_bcp();
571 if (m->validate_bci_from_bcp(bcp) < 0) {
572 return false;
573 }
574
575 // validate constantPoolCache*
576 ConstantPoolCache* cp = *interpreter_frame_cache_addr();
577 if (cp == NULL || !cp->is_metaspace_object()) return false;
578
579 // validate locals
580
581 address locals = (address) *interpreter_frame_locals_addr();
582
583 if (locals > thread->stack_base() || locals < (address) fp()) return false;
584
585 // We'd have to be pretty unlucky to be mislead at this point
586
587 #endif // CC_INTERP
588 return true;
589 }
590
591 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {
592 #ifdef CC_INTERP
593 // Needed for JVMTI. The result should always be in the
594 // interpreterState object
595 interpreterState istate = get_interpreterState();
596 #endif // CC_INTERP
597 assert(is_interpreted_frame(), "interpreted frame expected");
598 Method* method = interpreter_frame_method();
599 BasicType type = method->result_type();
600
601 intptr_t* tos_addr;
602 if (method->is_native()) {
603 // TODO : ensure AARCH64 does the same as Intel here i.e. push v0 then r0
604 // Prior to calling into the runtime to report the method_exit the possible
605 // return value is pushed to the native stack. If the result is a jfloat/jdouble
606 // then ST0 is saved before EAX/EDX. See the note in generate_native_result
607 tos_addr = (intptr_t*)sp();
608 if (type == T_FLOAT || type == T_DOUBLE) {
609 // This is times two because we do a push(ltos) after pushing XMM0
610 // and that takes two interpreter stack slots.
611 tos_addr += 2 * Interpreter::stackElementWords;
612 }
613 } else {
614 tos_addr = (intptr_t*)interpreter_frame_tos_address();
615 }
616
617 switch (type) {
618 case T_OBJECT :
619 case T_ARRAY : {
620 oop obj;
621 if (method->is_native()) {
622 #ifdef CC_INTERP
623 obj = istate->_oop_temp;
624 #else
625 obj = cast_to_oop(at(interpreter_frame_oop_temp_offset));
626 #endif // CC_INTERP
627 } else {
628 oop* obj_p = (oop*)tos_addr;
629 obj = (obj_p == NULL) ? (oop)NULL : *obj_p;
630 }
631 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
632 *oop_result = obj;
633 break;
634 }
635 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break;
636 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break;
637 case T_CHAR : value_result->c = *(jchar*)tos_addr; break;
638 case T_SHORT : value_result->s = *(jshort*)tos_addr; break;
639 case T_INT : value_result->i = *(jint*)tos_addr; break;
640 case T_LONG : value_result->j = *(jlong*)tos_addr; break;
641 case T_FLOAT : {
642 value_result->f = *(jfloat*)tos_addr;
643 break;
644 }
645 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break;
646 case T_VOID : /* Nothing to do */ break;
647 default : ShouldNotReachHere();
648 }
649
650 return type;
651 }
652
653
654 intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
655 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
656 return &interpreter_frame_tos_address()[index];
657 }
658
659 #ifndef PRODUCT
660
661 #define DESCRIBE_FP_OFFSET(name) \
662 values.describe(frame_no, fp() + frame::name##_offset, #name)
663
664 void frame::describe_pd(FrameValues& values, int frame_no) {
665 if (is_interpreted_frame()) {
666 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp);
667 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp);
668 DESCRIBE_FP_OFFSET(interpreter_frame_method);
669 DESCRIBE_FP_OFFSET(interpreter_frame_mdp);
670 DESCRIBE_FP_OFFSET(interpreter_frame_cache);
671 DESCRIBE_FP_OFFSET(interpreter_frame_locals);
672 DESCRIBE_FP_OFFSET(interpreter_frame_bcp);
673 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp);
674 }
675 }
676 #endif
677
678 intptr_t *frame::initial_deoptimization_info() {
679 // Not used on aarch64, but we must return something.
680 return NULL;
681 }
682
683 intptr_t* frame::real_fp() const {
684 if (_cb != NULL) {
685 // use the frame size if valid
686 int size = _cb->frame_size();
687 if (size > 0) {
688 return unextended_sp() + size;
689 }
690 }
691 // else rely on fp()
692 assert(! is_compiled_frame(), "unknown compiled frame size");
693 return fp();
694 }
695
696 #undef DESCRIBE_FP_OFFSET
697
698 #define DESCRIBE_FP_OFFSET(name) \
699 { \
700 unsigned long *p = (unsigned long *)fp; \
701 printf("0x%016lx 0x%016lx %s\n", (unsigned long)(p + frame::name##_offset), \
702 p[frame::name##_offset], #name); \
703 }
704
705 static __thread unsigned long nextfp;
706 static __thread unsigned long nextpc;
707 static __thread unsigned long nextsp;
708 static __thread RegisterMap *reg_map;
709
710 static void printbc(Method *m, intptr_t bcx) {
711 const char *name;
712 char buf[16];
713 if (m->validate_bci_from_bcp((address)bcx) < 0
714 || !m->contains((address)bcx)) {
715 name = "???";
716 snprintf(buf, sizeof buf, "(bad)");
717 } else {
718 int bci = m->bci_from((address)bcx);
719 snprintf(buf, sizeof buf, "%d", bci);
720 name = Bytecodes::name(m->code_at(bci));
721 }
722 ResourceMark rm;
723 printf("%s : %s ==> %s\n", m->name_and_sig_as_C_string(), buf, name);
724 }
725
726 void internal_pf(unsigned long sp, unsigned long fp, unsigned long pc, unsigned long bcx) {
727 if (! fp)
728 return;
729
730 DESCRIBE_FP_OFFSET(return_addr);
731 DESCRIBE_FP_OFFSET(link);
732 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp);
733 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp);
734 DESCRIBE_FP_OFFSET(interpreter_frame_method);
735 DESCRIBE_FP_OFFSET(interpreter_frame_mdp);
736 DESCRIBE_FP_OFFSET(interpreter_frame_cache);
737 DESCRIBE_FP_OFFSET(interpreter_frame_locals);
738 DESCRIBE_FP_OFFSET(interpreter_frame_bcp);
739 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp);
740 unsigned long *p = (unsigned long *)fp;
741
742 // We want to see all frames, native and Java. For compiled and
743 // interpreted frames we have special information that allows us to
744 // unwind them; for everything else we assume that the native frame
745 // pointer chain is intact.
746 frame this_frame((intptr_t*)sp, (intptr_t*)fp, (address)pc);
747 if (this_frame.is_compiled_frame() ||
748 this_frame.is_interpreted_frame()) {
749 frame sender = this_frame.sender(reg_map);
750 nextfp = (unsigned long)sender.fp();
751 nextpc = (unsigned long)sender.pc();
752 nextsp = (unsigned long)sender.unextended_sp();
753 } else {
754 nextfp = p[frame::link_offset];
755 nextpc = p[frame::return_addr_offset];
756 nextsp = (unsigned long)&p[frame::sender_sp_offset];
757 }
758
759 if (bcx == -1ul)
760 bcx = p[frame::interpreter_frame_bcp_offset];
761
762 if (Interpreter::contains((address)pc)) {
763 Method* m = (Method*)p[frame::interpreter_frame_method_offset];
764 if(m && m->is_method()) {
765 printbc(m, bcx);
766 } else
767 printf("not a Method\n");
768 } else {
769 CodeBlob *cb = CodeCache::find_blob((address)pc);
770 if (cb != NULL) {
771 if (cb->is_nmethod()) {
772 ResourceMark rm;
773 nmethod* nm = (nmethod*)cb;
774 printf("nmethod %s\n", nm->method()->name_and_sig_as_C_string());
775 } else if (cb->name()) {
776 printf("CodeBlob %s\n", cb->name());
777 }
778 }
779 }
780 }
781
782 extern "C" void npf() {
783 CodeBlob *cb = CodeCache::find_blob((address)nextpc);
784 // C2 does not always chain the frame pointers when it can, instead
785 // preferring to use fixed offsets from SP, so a simple leave() does
786 // not work. Instead, it adds the frame size to SP then pops FP and
787 // LR. We have to do the same thing to get a good call chain.
788 if (cb && cb->frame_size())
789 nextfp = nextsp + wordSize * (cb->frame_size() - 2);
790 internal_pf (nextsp, nextfp, nextpc, -1);
791 }
792
793 extern "C" void pf(unsigned long sp, unsigned long fp, unsigned long pc,
794 unsigned long bcx, unsigned long thread) {
795 RegisterMap map((JavaThread*)thread, false);
796 if (!reg_map) {
797 reg_map = (RegisterMap*)os::malloc(sizeof map, mtNone);
798 }
799 memcpy(reg_map, &map, sizeof map);
800 {
801 CodeBlob *cb = CodeCache::find_blob((address)pc);
802 if (cb && cb->frame_size())
803 fp = sp + wordSize * (cb->frame_size() - 2);
804 }
805 internal_pf(sp, fp, pc, bcx);
806 }
807
808 // support for printing out where we are in a Java method
809 // needs to be passed current fp and bcp register values
810 // prints method name, bc index and bytecode name
811 extern "C" void pm(unsigned long fp, unsigned long bcx) {
812 DESCRIBE_FP_OFFSET(interpreter_frame_method);
813 unsigned long *p = (unsigned long *)fp;
814 Method* m = (Method*)p[frame::interpreter_frame_method_offset];
815 printbc(m, bcx);
816 }
817
818 #ifndef PRODUCT
819 // This is a generic constructor which is only used by pns() in debug.cpp.
820 frame::frame(void* sp, void* fp, void* pc) {
821 init((intptr_t*)sp, (intptr_t*)fp, (address)pc);
822 }
823 #endif