Tue, 08 Feb 2011 09:11:37 -0800
7017673: Remove setting of the sun.jkernel.DownloadManager as a boot classloader hook
Reviewed-by: alanb, dcubed, coleenp
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 */
25 #include "precompiled.hpp"
26 #include "gc_interface/collectedHeap.inline.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/oopMapCache.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "memory/universe.inline.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/methodDataOop.hpp"
33 #include "oops/methodOop.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "oops/oop.inline2.hpp"
36 #include "runtime/frame.inline.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "runtime/javaCalls.hpp"
39 #include "runtime/monitorChunk.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/signature.hpp"
42 #include "runtime/stubCodeGenerator.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "utilities/decoder.hpp"
46 #ifdef TARGET_ARCH_x86
47 # include "nativeInst_x86.hpp"
48 #endif
49 #ifdef TARGET_ARCH_sparc
50 # include "nativeInst_sparc.hpp"
51 #endif
52 #ifdef TARGET_ARCH_zero
53 # include "nativeInst_zero.hpp"
54 #endif
55 #ifdef TARGET_ARCH_arm
56 # include "nativeInst_arm.hpp"
57 #endif
58 #ifdef TARGET_ARCH_ppc
59 # include "nativeInst_ppc.hpp"
60 #endif
62 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) {
63 _thread = thread;
64 _update_map = update_map;
65 clear();
66 debug_only(_update_for_id = NULL;)
67 #ifndef PRODUCT
68 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL;
69 #endif /* PRODUCT */
70 }
72 RegisterMap::RegisterMap(const RegisterMap* map) {
73 assert(map != this, "bad initialization parameter");
74 assert(map != NULL, "RegisterMap must be present");
75 _thread = map->thread();
76 _update_map = map->update_map();
77 _include_argument_oops = map->include_argument_oops();
78 debug_only(_update_for_id = map->_update_for_id;)
79 pd_initialize_from(map);
80 if (update_map()) {
81 for(int i = 0; i < location_valid_size; i++) {
82 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i];
83 _location_valid[i] = bits;
84 // for whichever bits are set, pull in the corresponding map->_location
85 int j = i*location_valid_type_size;
86 while (bits != 0) {
87 if ((bits & 1) != 0) {
88 assert(0 <= j && j < reg_count, "range check");
89 _location[j] = map->_location[j];
90 }
91 bits >>= 1;
92 j += 1;
93 }
94 }
95 }
96 }
98 void RegisterMap::clear() {
99 set_include_argument_oops(true);
100 if (_update_map) {
101 for(int i = 0; i < location_valid_size; i++) {
102 _location_valid[i] = 0;
103 }
104 pd_clear();
105 } else {
106 pd_initialize();
107 }
108 }
110 #ifndef PRODUCT
112 void RegisterMap::print_on(outputStream* st) const {
113 st->print_cr("Register map");
114 for(int i = 0; i < reg_count; i++) {
116 VMReg r = VMRegImpl::as_VMReg(i);
117 intptr_t* src = (intptr_t*) location(r);
118 if (src != NULL) {
120 r->print_on(st);
121 st->print(" [" INTPTR_FORMAT "] = ", src);
122 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) {
123 st->print_cr("<misaligned>");
124 } else {
125 st->print_cr(INTPTR_FORMAT, *src);
126 }
127 }
128 }
129 }
131 void RegisterMap::print() const {
132 print_on(tty);
133 }
135 #endif
136 // This returns the pc that if you were in the debugger you'd see. Not
137 // the idealized value in the frame object. This undoes the magic conversion
138 // that happens for deoptimized frames. In addition it makes the value the
139 // hardware would want to see in the native frame. The only user (at this point)
140 // is deoptimization. It likely no one else should ever use it.
142 address frame::raw_pc() const {
143 if (is_deoptimized_frame()) {
144 nmethod* nm = cb()->as_nmethod_or_null();
145 if (nm->is_method_handle_return(pc()))
146 return nm->deopt_mh_handler_begin() - pc_return_offset;
147 else
148 return nm->deopt_handler_begin() - pc_return_offset;
149 } else {
150 return (pc() - pc_return_offset);
151 }
152 }
154 // Change the pc in a frame object. This does not change the actual pc in
155 // actual frame. To do that use patch_pc.
156 //
157 void frame::set_pc(address newpc ) {
158 #ifdef ASSERT
159 if (_cb != NULL && _cb->is_nmethod()) {
160 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation");
161 }
162 #endif // ASSERT
164 // Unsafe to use the is_deoptimzed tester after changing pc
165 _deopt_state = unknown;
166 _pc = newpc;
167 _cb = CodeCache::find_blob_unsafe(_pc);
169 }
171 // type testers
172 bool frame::is_deoptimized_frame() const {
173 assert(_deopt_state != unknown, "not answerable");
174 return _deopt_state == is_deoptimized;
175 }
177 bool frame::is_native_frame() const {
178 return (_cb != NULL &&
179 _cb->is_nmethod() &&
180 ((nmethod*)_cb)->is_native_method());
181 }
183 bool frame::is_java_frame() const {
184 if (is_interpreted_frame()) return true;
185 if (is_compiled_frame()) return true;
186 return false;
187 }
190 bool frame::is_compiled_frame() const {
191 if (_cb != NULL &&
192 _cb->is_nmethod() &&
193 ((nmethod*)_cb)->is_java_method()) {
194 return true;
195 }
196 return false;
197 }
200 bool frame::is_runtime_frame() const {
201 return (_cb != NULL && _cb->is_runtime_stub());
202 }
204 bool frame::is_safepoint_blob_frame() const {
205 return (_cb != NULL && _cb->is_safepoint_stub());
206 }
208 // testers
210 bool frame::is_first_java_frame() const {
211 RegisterMap map(JavaThread::current(), false); // No update
212 frame s;
213 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map));
214 return s.is_first_frame();
215 }
218 bool frame::entry_frame_is_first() const {
219 return entry_frame_call_wrapper()->anchor()->last_Java_sp() == NULL;
220 }
223 bool frame::should_be_deoptimized() const {
224 if (_deopt_state == is_deoptimized ||
225 !is_compiled_frame() ) return false;
226 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod");
227 nmethod* nm = (nmethod *)_cb;
228 if (TraceDependencies) {
229 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
230 nm->print_value_on(tty);
231 tty->cr();
232 }
234 if( !nm->is_marked_for_deoptimization() )
235 return false;
237 // If at the return point, then the frame has already been popped, and
238 // only the return needs to be executed. Don't deoptimize here.
239 return !nm->is_at_poll_return(pc());
240 }
242 bool frame::can_be_deoptimized() const {
243 if (!is_compiled_frame()) return false;
244 nmethod* nm = (nmethod*)_cb;
246 if( !nm->can_be_deoptimized() )
247 return false;
249 return !nm->is_at_poll_return(pc());
250 }
252 void frame::deoptimize(JavaThread* thread) {
253 // Schedule deoptimization of an nmethod activation with this frame.
254 assert(_cb != NULL && _cb->is_nmethod(), "must be");
255 nmethod* nm = (nmethod*)_cb;
257 // This is a fix for register window patching race
258 if (NeedsDeoptSuspend && Thread::current() != thread) {
259 assert(SafepointSynchronize::is_at_safepoint(),
260 "patching other threads for deopt may only occur at a safepoint");
262 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that
263 // we could see the frame again and ask for it to be deoptimized since
264 // it might move for a long time. That is harmless and we just ignore it.
265 if (id() == thread->must_deopt_id()) {
266 assert(thread->is_deopt_suspend(), "lost suspension");
267 return;
268 }
270 // We are at a safepoint so the target thread can only be
271 // in 4 states:
272 // blocked - no problem
273 // blocked_trans - no problem (i.e. could have woken up from blocked
274 // during a safepoint).
275 // native - register window pc patching race
276 // native_trans - momentary state
277 //
278 // We could just wait out a thread in native_trans to block.
279 // Then we'd have all the issues that the safepoint code has as to
280 // whether to spin or block. It isn't worth it. Just treat it like
281 // native and be done with it.
282 //
283 // Examine the state of the thread at the start of safepoint since
284 // threads that were in native at the start of the safepoint could
285 // come to a halt during the safepoint, changing the current value
286 // of the safepoint_state.
287 JavaThreadState state = thread->safepoint_state()->orig_thread_state();
288 if (state == _thread_in_native || state == _thread_in_native_trans) {
289 // Since we are at a safepoint the target thread will stop itself
290 // before it can return to java as long as we remain at the safepoint.
291 // Therefore we can put an additional request for the thread to stop
292 // no matter what no (like a suspend). This will cause the thread
293 // to notice it needs to do the deopt on its own once it leaves native.
294 //
295 // The only reason we must do this is because on machine with register
296 // windows we have a race with patching the return address and the
297 // window coming live as the thread returns to the Java code (but still
298 // in native mode) and then blocks. It is only this top most frame
299 // that is at risk. So in truth we could add an additional check to
300 // see if this frame is one that is at risk.
301 RegisterMap map(thread, false);
302 frame at_risk = thread->last_frame().sender(&map);
303 if (id() == at_risk.id()) {
304 thread->set_must_deopt_id(id());
305 thread->set_deopt_suspend();
306 return;
307 }
308 }
309 } // NeedsDeoptSuspend
312 // If the call site is a MethodHandle call site use the MH deopt
313 // handler.
314 address deopt = nm->is_method_handle_return(pc()) ?
315 nm->deopt_mh_handler_begin() :
316 nm->deopt_handler_begin();
318 // Save the original pc before we patch in the new one
319 nm->set_original_pc(this, pc());
320 patch_pc(thread, deopt);
322 #ifdef ASSERT
323 {
324 RegisterMap map(thread, false);
325 frame check = thread->last_frame();
326 while (id() != check.id()) {
327 check = check.sender(&map);
328 }
329 assert(check.is_deoptimized_frame(), "missed deopt");
330 }
331 #endif // ASSERT
332 }
334 frame frame::java_sender() const {
335 RegisterMap map(JavaThread::current(), false);
336 frame s;
337 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ;
338 guarantee(s.is_java_frame(), "tried to get caller of first java frame");
339 return s;
340 }
342 frame frame::real_sender(RegisterMap* map) const {
343 frame result = sender(map);
344 while (result.is_runtime_frame()) {
345 result = result.sender(map);
346 }
347 return result;
348 }
350 // Note: called by profiler - NOT for current thread
351 frame frame::profile_find_Java_sender_frame(JavaThread *thread) {
352 // If we don't recognize this frame, walk back up the stack until we do
353 RegisterMap map(thread, false);
354 frame first_java_frame = frame();
356 // Find the first Java frame on the stack starting with input frame
357 if (is_java_frame()) {
358 // top frame is compiled frame or deoptimized frame
359 first_java_frame = *this;
360 } else if (safe_for_sender(thread)) {
361 for (frame sender_frame = sender(&map);
362 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame();
363 sender_frame = sender_frame.sender(&map)) {
364 if (sender_frame.is_java_frame()) {
365 first_java_frame = sender_frame;
366 break;
367 }
368 }
369 }
370 return first_java_frame;
371 }
373 // Interpreter frames
376 void frame::interpreter_frame_set_locals(intptr_t* locs) {
377 assert(is_interpreted_frame(), "Not an interpreted frame");
378 *interpreter_frame_locals_addr() = locs;
379 }
381 methodOop frame::interpreter_frame_method() const {
382 assert(is_interpreted_frame(), "interpreted frame expected");
383 methodOop m = *interpreter_frame_method_addr();
384 assert(m->is_perm(), "bad methodOop in interpreter frame");
385 assert(m->is_method(), "not a methodOop");
386 return m;
387 }
389 void frame::interpreter_frame_set_method(methodOop method) {
390 assert(is_interpreted_frame(), "interpreted frame expected");
391 *interpreter_frame_method_addr() = method;
392 }
394 void frame::interpreter_frame_set_bcx(intptr_t bcx) {
395 assert(is_interpreted_frame(), "Not an interpreted frame");
396 if (ProfileInterpreter) {
397 bool formerly_bci = is_bci(interpreter_frame_bcx());
398 bool is_now_bci = is_bci(bcx);
399 *interpreter_frame_bcx_addr() = bcx;
401 intptr_t mdx = interpreter_frame_mdx();
403 if (mdx != 0) {
404 if (formerly_bci) {
405 if (!is_now_bci) {
406 // The bcx was just converted from bci to bcp.
407 // Convert the mdx in parallel.
408 methodDataOop mdo = interpreter_frame_method()->method_data();
409 assert(mdo != NULL, "");
410 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one.
411 address mdp = mdo->di_to_dp(mdi);
412 interpreter_frame_set_mdx((intptr_t)mdp);
413 }
414 } else {
415 if (is_now_bci) {
416 // The bcx was just converted from bcp to bci.
417 // Convert the mdx in parallel.
418 methodDataOop mdo = interpreter_frame_method()->method_data();
419 assert(mdo != NULL, "");
420 int mdi = mdo->dp_to_di((address)mdx);
421 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0.
422 }
423 }
424 }
425 } else {
426 *interpreter_frame_bcx_addr() = bcx;
427 }
428 }
430 jint frame::interpreter_frame_bci() const {
431 assert(is_interpreted_frame(), "interpreted frame expected");
432 intptr_t bcx = interpreter_frame_bcx();
433 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx);
434 }
436 void frame::interpreter_frame_set_bci(jint bci) {
437 assert(is_interpreted_frame(), "interpreted frame expected");
438 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC");
439 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci));
440 }
442 address frame::interpreter_frame_bcp() const {
443 assert(is_interpreted_frame(), "interpreted frame expected");
444 intptr_t bcx = interpreter_frame_bcx();
445 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx;
446 }
448 void frame::interpreter_frame_set_bcp(address bcp) {
449 assert(is_interpreted_frame(), "interpreted frame expected");
450 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC");
451 interpreter_frame_set_bcx((intptr_t)bcp);
452 }
454 void frame::interpreter_frame_set_mdx(intptr_t mdx) {
455 assert(is_interpreted_frame(), "Not an interpreted frame");
456 assert(ProfileInterpreter, "must be profiling interpreter");
457 *interpreter_frame_mdx_addr() = mdx;
458 }
460 address frame::interpreter_frame_mdp() const {
461 assert(ProfileInterpreter, "must be profiling interpreter");
462 assert(is_interpreted_frame(), "interpreted frame expected");
463 intptr_t bcx = interpreter_frame_bcx();
464 intptr_t mdx = interpreter_frame_mdx();
466 assert(!is_bci(bcx), "should not access mdp during GC");
467 return (address)mdx;
468 }
470 void frame::interpreter_frame_set_mdp(address mdp) {
471 assert(is_interpreted_frame(), "interpreted frame expected");
472 if (mdp == NULL) {
473 // Always allow the mdp to be cleared.
474 interpreter_frame_set_mdx((intptr_t)mdp);
475 }
476 intptr_t bcx = interpreter_frame_bcx();
477 assert(!is_bci(bcx), "should not set mdp during GC");
478 interpreter_frame_set_mdx((intptr_t)mdp);
479 }
481 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const {
482 assert(is_interpreted_frame(), "Not an interpreted frame");
483 #ifdef ASSERT
484 interpreter_frame_verify_monitor(current);
485 #endif
486 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size());
487 return next;
488 }
490 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const {
491 assert(is_interpreted_frame(), "Not an interpreted frame");
492 #ifdef ASSERT
493 // // This verification needs to be checked before being enabled
494 // interpreter_frame_verify_monitor(current);
495 #endif
496 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size());
497 return previous;
498 }
500 // Interpreter locals and expression stack locations.
502 intptr_t* frame::interpreter_frame_local_at(int index) const {
503 const int n = Interpreter::local_offset_in_bytes(index)/wordSize;
504 return &((*interpreter_frame_locals_addr())[n]);
505 }
507 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const {
508 const int i = offset * interpreter_frame_expression_stack_direction();
509 const int n = i * Interpreter::stackElementWords;
510 return &(interpreter_frame_expression_stack()[n]);
511 }
513 jint frame::interpreter_frame_expression_stack_size() const {
514 // Number of elements on the interpreter expression stack
515 // Callers should span by stackElementWords
516 int element_size = Interpreter::stackElementWords;
517 if (frame::interpreter_frame_expression_stack_direction() < 0) {
518 return (interpreter_frame_expression_stack() -
519 interpreter_frame_tos_address() + 1)/element_size;
520 } else {
521 return (interpreter_frame_tos_address() -
522 interpreter_frame_expression_stack() + 1)/element_size;
523 }
524 }
527 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp)
529 const char* frame::print_name() const {
530 if (is_native_frame()) return "Native";
531 if (is_interpreted_frame()) return "Interpreted";
532 if (is_compiled_frame()) {
533 if (is_deoptimized_frame()) return "Deoptimized";
534 return "Compiled";
535 }
536 if (sp() == NULL) return "Empty";
537 return "C";
538 }
540 void frame::print_value_on(outputStream* st, JavaThread *thread) const {
541 NOT_PRODUCT(address begin = pc()-40;)
542 NOT_PRODUCT(address end = NULL;)
544 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp());
545 if (sp() != NULL)
546 st->print(", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), pc());
548 if (StubRoutines::contains(pc())) {
549 st->print_cr(")");
550 st->print("(");
551 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
552 st->print("~Stub::%s", desc->name());
553 NOT_PRODUCT(begin = desc->begin(); end = desc->end();)
554 } else if (Interpreter::contains(pc())) {
555 st->print_cr(")");
556 st->print("(");
557 InterpreterCodelet* desc = Interpreter::codelet_containing(pc());
558 if (desc != NULL) {
559 st->print("~");
560 desc->print();
561 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();)
562 } else {
563 st->print("~interpreter");
564 }
565 }
566 st->print_cr(")");
568 if (_cb != NULL) {
569 st->print(" ");
570 _cb->print_value_on(st);
571 st->cr();
572 #ifndef PRODUCT
573 if (end == NULL) {
574 begin = _cb->code_begin();
575 end = _cb->code_end();
576 }
577 #endif
578 }
579 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);)
580 }
583 void frame::print_on(outputStream* st) const {
584 print_value_on(st,NULL);
585 if (is_interpreted_frame()) {
586 interpreter_frame_print_on(st);
587 }
588 }
591 void frame::interpreter_frame_print_on(outputStream* st) const {
592 #ifndef PRODUCT
593 assert(is_interpreted_frame(), "Not an interpreted frame");
594 jint i;
595 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) {
596 intptr_t x = *interpreter_frame_local_at(i);
597 st->print(" - local [" INTPTR_FORMAT "]", x);
598 st->fill_to(23);
599 st->print_cr("; #%d", i);
600 }
601 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) {
602 intptr_t x = *interpreter_frame_expression_stack_at(i);
603 st->print(" - stack [" INTPTR_FORMAT "]", x);
604 st->fill_to(23);
605 st->print_cr("; #%d", i);
606 }
607 // locks for synchronization
608 for (BasicObjectLock* current = interpreter_frame_monitor_end();
609 current < interpreter_frame_monitor_begin();
610 current = next_monitor_in_interpreter_frame(current)) {
611 st->print(" - obj [");
612 current->obj()->print_value_on(st);
613 st->print_cr("]");
614 st->print(" - lock [");
615 current->lock()->print_on(st);
616 st->print_cr("]");
617 }
618 // monitor
619 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin());
620 // bcp
621 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp());
622 st->fill_to(23);
623 st->print_cr("; @%d", interpreter_frame_bci());
624 // locals
625 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0));
626 // method
627 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method());
628 st->fill_to(23);
629 st->print("; ");
630 interpreter_frame_method()->print_name(st);
631 st->cr();
632 #endif
633 }
635 // Return whether the frame is in the VM or os indicating a Hotspot problem.
636 // Otherwise, it's likely a bug in the native library that the Java code calls,
637 // hopefully indicating where to submit bugs.
638 static void print_C_frame(outputStream* st, char* buf, int buflen, address pc) {
639 // C/C++ frame
640 bool in_vm = os::address_is_in_vm(pc);
641 st->print(in_vm ? "V" : "C");
643 int offset;
644 bool found;
646 // libname
647 found = os::dll_address_to_library_name(pc, buf, buflen, &offset);
648 if (found) {
649 // skip directory names
650 const char *p1, *p2;
651 p1 = buf;
652 int len = (int)strlen(os::file_separator());
653 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
654 st->print(" [%s+0x%x]", p1, offset);
655 } else {
656 st->print(" " PTR_FORMAT, pc);
657 }
659 // function name - os::dll_address_to_function_name() may return confusing
660 // names if pc is within jvm.dll or libjvm.so, because JVM only has
661 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this
662 // only for native libraries.
663 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) {
664 found = os::dll_address_to_function_name(pc, buf, buflen, &offset);
666 if (found) {
667 st->print(" %s+0x%x", buf, offset);
668 }
669 }
670 }
672 // frame::print_on_error() is called by fatal error handler. Notice that we may
673 // crash inside this function if stack frame is corrupted. The fatal error
674 // handler can catch and handle the crash. Here we assume the frame is valid.
675 //
676 // First letter indicates type of the frame:
677 // J: Java frame (compiled)
678 // j: Java frame (interpreted)
679 // V: VM frame (C/C++)
680 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.)
681 // C: C/C++ frame
682 //
683 // We don't need detailed frame type as that in frame::print_name(). "C"
684 // suggests the problem is in user lib; everything else is likely a VM bug.
686 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const {
687 if (_cb != NULL) {
688 if (Interpreter::contains(pc())) {
689 methodOop m = this->interpreter_frame_method();
690 if (m != NULL) {
691 m->name_and_sig_as_C_string(buf, buflen);
692 st->print("j %s", buf);
693 st->print("+%d", this->interpreter_frame_bci());
694 } else {
695 st->print("j " PTR_FORMAT, pc());
696 }
697 } else if (StubRoutines::contains(pc())) {
698 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
699 if (desc != NULL) {
700 st->print("v ~StubRoutines::%s", desc->name());
701 } else {
702 st->print("v ~StubRoutines::" PTR_FORMAT, pc());
703 }
704 } else if (_cb->is_buffer_blob()) {
705 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name());
706 } else if (_cb->is_nmethod()) {
707 methodOop m = ((nmethod *)_cb)->method();
708 if (m != NULL) {
709 m->name_and_sig_as_C_string(buf, buflen);
710 st->print("J %s", buf);
711 } else {
712 st->print("J " PTR_FORMAT, pc());
713 }
714 } else if (_cb->is_runtime_stub()) {
715 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name());
716 } else if (_cb->is_deoptimization_stub()) {
717 st->print("v ~DeoptimizationBlob");
718 } else if (_cb->is_exception_stub()) {
719 st->print("v ~ExceptionBlob");
720 } else if (_cb->is_safepoint_stub()) {
721 st->print("v ~SafepointBlob");
722 } else {
723 st->print("v blob " PTR_FORMAT, pc());
724 }
725 } else {
726 print_C_frame(st, buf, buflen, pc());
727 }
728 }
731 /*
732 The interpreter_frame_expression_stack_at method in the case of SPARC needs the
733 max_stack value of the method in order to compute the expression stack address.
734 It uses the methodOop in order to get the max_stack value but during GC this
735 methodOop value saved on the frame is changed by reverse_and_push and hence cannot
736 be used. So we save the max_stack value in the FrameClosure object and pass it
737 down to the interpreter_frame_expression_stack_at method
738 */
739 class InterpreterFrameClosure : public OffsetClosure {
740 private:
741 frame* _fr;
742 OopClosure* _f;
743 int _max_locals;
744 int _max_stack;
746 public:
747 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack,
748 OopClosure* f) {
749 _fr = fr;
750 _max_locals = max_locals;
751 _max_stack = max_stack;
752 _f = f;
753 }
755 void offset_do(int offset) {
756 oop* addr;
757 if (offset < _max_locals) {
758 addr = (oop*) _fr->interpreter_frame_local_at(offset);
759 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame");
760 _f->do_oop(addr);
761 } else {
762 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals));
763 // In case of exceptions, the expression stack is invalid and the esp will be reset to express
764 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel).
765 bool in_stack;
766 if (frame::interpreter_frame_expression_stack_direction() > 0) {
767 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address();
768 } else {
769 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address();
770 }
771 if (in_stack) {
772 _f->do_oop(addr);
773 }
774 }
775 }
777 int max_locals() { return _max_locals; }
778 frame* fr() { return _fr; }
779 };
782 class InterpretedArgumentOopFinder: public SignatureInfo {
783 private:
784 OopClosure* _f; // Closure to invoke
785 int _offset; // TOS-relative offset, decremented with each argument
786 bool _has_receiver; // true if the callee has a receiver
787 frame* _fr;
789 void set(int size, BasicType type) {
790 _offset -= size;
791 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do();
792 }
794 void oop_offset_do() {
795 oop* addr;
796 addr = (oop*)_fr->interpreter_frame_tos_at(_offset);
797 _f->do_oop(addr);
798 }
800 public:
801 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) {
802 // compute size of arguments
803 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0);
804 assert(!fr->is_interpreted_frame() ||
805 args_size <= fr->interpreter_frame_expression_stack_size(),
806 "args cannot be on stack anymore");
807 // initialize InterpretedArgumentOopFinder
808 _f = f;
809 _fr = fr;
810 _offset = args_size;
811 }
813 void oops_do() {
814 if (_has_receiver) {
815 --_offset;
816 oop_offset_do();
817 }
818 iterate_parameters();
819 }
820 };
823 // Entry frame has following form (n arguments)
824 // +-----------+
825 // sp -> | last arg |
826 // +-----------+
827 // : ::: :
828 // +-----------+
829 // (sp+n)->| first arg|
830 // +-----------+
834 // visits and GC's all the arguments in entry frame
835 class EntryFrameOopFinder: public SignatureInfo {
836 private:
837 bool _is_static;
838 int _offset;
839 frame* _fr;
840 OopClosure* _f;
842 void set(int size, BasicType type) {
843 assert (_offset >= 0, "illegal offset");
844 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset);
845 _offset -= size;
846 }
848 void oop_at_offset_do(int offset) {
849 assert (offset >= 0, "illegal offset");
850 oop* addr = (oop*) _fr->entry_frame_argument_at(offset);
851 _f->do_oop(addr);
852 }
854 public:
855 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) {
856 _f = NULL; // will be set later
857 _fr = frame;
858 _is_static = is_static;
859 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0
860 }
862 void arguments_do(OopClosure* f) {
863 _f = f;
864 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver
865 iterate_parameters();
866 }
868 };
870 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) {
871 ArgumentSizeComputer asc(signature);
872 int size = asc.size();
873 return (oop *)interpreter_frame_tos_at(size);
874 }
877 void frame::oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache) {
878 assert(is_interpreted_frame(), "Not an interpreted frame");
879 assert(map != NULL, "map must be set");
880 Thread *thread = Thread::current();
881 methodHandle m (thread, interpreter_frame_method());
882 jint bci = interpreter_frame_bci();
884 assert(Universe::heap()->is_in(m()), "must be valid oop");
885 assert(m->is_method(), "checking frame value");
886 assert((m->is_native() && bci == 0) || (!m->is_native() && bci >= 0 && bci < m->code_size()), "invalid bci value");
888 // Handle the monitor elements in the activation
889 for (
890 BasicObjectLock* current = interpreter_frame_monitor_end();
891 current < interpreter_frame_monitor_begin();
892 current = next_monitor_in_interpreter_frame(current)
893 ) {
894 #ifdef ASSERT
895 interpreter_frame_verify_monitor(current);
896 #endif
897 current->oops_do(f);
898 }
900 // process fixed part
901 f->do_oop((oop*)interpreter_frame_method_addr());
902 f->do_oop((oop*)interpreter_frame_cache_addr());
904 // Hmm what about the mdp?
905 #ifdef CC_INTERP
906 // Interpreter frame in the midst of a call have a methodOop within the
907 // object.
908 interpreterState istate = get_interpreterState();
909 if (istate->msg() == BytecodeInterpreter::call_method) {
910 f->do_oop((oop*)&istate->_result._to_call._callee);
911 }
913 #endif /* CC_INTERP */
915 #if !defined(PPC) || defined(ZERO)
916 if (m->is_native()) {
917 #ifdef CC_INTERP
918 f->do_oop((oop*)&istate->_oop_temp);
919 #else
920 f->do_oop((oop*)( fp() + interpreter_frame_oop_temp_offset ));
921 #endif /* CC_INTERP */
922 }
923 #else // PPC
924 if (m->is_native() && m->is_static()) {
925 f->do_oop(interpreter_frame_mirror_addr());
926 }
927 #endif // PPC
929 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
931 Symbol* signature = NULL;
932 bool has_receiver = false;
934 // Process a callee's arguments if we are at a call site
935 // (i.e., if we are at an invoke bytecode)
936 // This is used sometimes for calling into the VM, not for another
937 // interpreted or compiled frame.
938 if (!m->is_native()) {
939 Bytecode_invoke call = Bytecode_invoke_check(m, bci);
940 if (call.is_valid()) {
941 signature = call.signature();
942 has_receiver = call.has_receiver();
943 if (map->include_argument_oops() &&
944 interpreter_frame_expression_stack_size() > 0) {
945 ResourceMark rm(thread); // is this right ???
946 // we are at a call site & the expression stack is not empty
947 // => process callee's arguments
948 //
949 // Note: The expression stack can be empty if an exception
950 // occurred during method resolution/execution. In all
951 // cases we empty the expression stack completely be-
952 // fore handling the exception (the exception handling
953 // code in the interpreter calls a blocking runtime
954 // routine which can cause this code to be executed).
955 // (was bug gri 7/27/98)
956 oops_interpreted_arguments_do(signature, has_receiver, f);
957 }
958 }
959 }
961 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f);
963 // process locals & expression stack
964 InterpreterOopMap mask;
965 if (query_oop_map_cache) {
966 m->mask_for(bci, &mask);
967 } else {
968 OopMapCache::compute_one_oop_map(m, bci, &mask);
969 }
970 mask.iterate_oop(&blk);
971 }
974 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) {
975 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f);
976 finder.oops_do();
977 }
979 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) {
980 assert(_cb != NULL, "sanity check");
981 if (_cb->oop_maps() != NULL) {
982 OopMapSet::oops_do(this, reg_map, f);
984 // Preserve potential arguments for a callee. We handle this by dispatching
985 // on the codeblob. For c2i, we do
986 if (reg_map->include_argument_oops()) {
987 _cb->preserve_callee_argument_oops(*this, reg_map, f);
988 }
989 }
990 // In cases where perm gen is collected, GC will want to mark
991 // oops referenced from nmethods active on thread stacks so as to
992 // prevent them from being collected. However, this visit should be
993 // restricted to certain phases of the collection only. The
994 // closure decides how it wants nmethods to be traced.
995 if (cf != NULL)
996 cf->do_code_blob(_cb);
997 }
999 class CompiledArgumentOopFinder: public SignatureInfo {
1000 protected:
1001 OopClosure* _f;
1002 int _offset; // the current offset, incremented with each argument
1003 bool _has_receiver; // true if the callee has a receiver
1004 frame _fr;
1005 RegisterMap* _reg_map;
1006 int _arg_size;
1007 VMRegPair* _regs; // VMReg list of arguments
1009 void set(int size, BasicType type) {
1010 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset();
1011 _offset += size;
1012 }
1014 virtual void handle_oop_offset() {
1015 // Extract low order register number from register array.
1016 // In LP64-land, the high-order bits are valid but unhelpful.
1017 VMReg reg = _regs[_offset].first();
1018 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map);
1019 _f->do_oop(loc);
1020 }
1022 public:
1023 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, OopClosure* f, frame fr, const RegisterMap* reg_map)
1024 : SignatureInfo(signature) {
1026 // initialize CompiledArgumentOopFinder
1027 _f = f;
1028 _offset = 0;
1029 _has_receiver = has_receiver;
1030 _fr = fr;
1031 _reg_map = (RegisterMap*)reg_map;
1032 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0);
1034 int arg_size;
1035 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, &arg_size);
1036 assert(arg_size == _arg_size, "wrong arg size");
1037 }
1039 void oops_do() {
1040 if (_has_receiver) {
1041 handle_oop_offset();
1042 _offset++;
1043 }
1044 iterate_parameters();
1045 }
1046 };
1048 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, const RegisterMap* reg_map, OopClosure* f) {
1049 ResourceMark rm;
1050 CompiledArgumentOopFinder finder(signature, has_receiver, f, *this, reg_map);
1051 finder.oops_do();
1052 }
1055 // Get receiver out of callers frame, i.e. find parameter 0 in callers
1056 // frame. Consult ADLC for where parameter 0 is to be found. Then
1057 // check local reg_map for it being a callee-save register or argument
1058 // register, both of which are saved in the local frame. If not found
1059 // there, it must be an in-stack argument of the caller.
1060 // Note: caller.sp() points to callee-arguments
1061 oop frame::retrieve_receiver(RegisterMap* reg_map) {
1062 frame caller = *this;
1064 // First consult the ADLC on where it puts parameter 0 for this signature.
1065 VMReg reg = SharedRuntime::name_for_receiver();
1066 oop r = *caller.oopmapreg_to_location(reg, reg_map);
1067 assert( Universe::heap()->is_in_or_null(r), "bad receiver" );
1068 return r;
1069 }
1072 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const {
1073 if(reg->is_reg()) {
1074 // If it is passed in a register, it got spilled in the stub frame.
1075 return (oop *)reg_map->location(reg);
1076 } else {
1077 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size;
1078 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes);
1079 }
1080 }
1082 BasicLock* frame::get_native_monitor() {
1083 nmethod* nm = (nmethod*)_cb;
1084 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1085 "Should not call this unless it's a native nmethod");
1086 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset());
1087 assert(byte_offset >= 0, "should not see invalid offset");
1088 return (BasicLock*) &sp()[byte_offset / wordSize];
1089 }
1091 oop frame::get_native_receiver() {
1092 nmethod* nm = (nmethod*)_cb;
1093 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1094 "Should not call this unless it's a native nmethod");
1095 int byte_offset = in_bytes(nm->native_receiver_sp_offset());
1096 assert(byte_offset >= 0, "should not see invalid offset");
1097 oop owner = ((oop*) sp())[byte_offset / wordSize];
1098 assert( Universe::heap()->is_in(owner), "bad receiver" );
1099 return owner;
1100 }
1102 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) {
1103 assert(map != NULL, "map must be set");
1104 if (map->include_argument_oops()) {
1105 // must collect argument oops, as nobody else is doing it
1106 Thread *thread = Thread::current();
1107 methodHandle m (thread, entry_frame_call_wrapper()->callee_method());
1108 EntryFrameOopFinder finder(this, m->signature(), m->is_static());
1109 finder.arguments_do(f);
1110 }
1111 // Traverse the Handle Block saved in the entry frame
1112 entry_frame_call_wrapper()->oops_do(f);
1113 }
1116 void frame::oops_do_internal(OopClosure* f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) {
1117 #ifndef PRODUCT
1118 // simulate GC crash here to dump java thread in error report
1119 if (CrashGCForDumpingJavaThread) {
1120 char *t = NULL;
1121 *t = 'c';
1122 }
1123 #endif
1124 if (is_interpreted_frame()) {
1125 oops_interpreted_do(f, map, use_interpreter_oop_map_cache);
1126 } else if (is_entry_frame()) {
1127 oops_entry_do(f, map);
1128 } else if (CodeCache::contains(pc())) {
1129 oops_code_blob_do(f, cf, map);
1130 #ifdef SHARK
1131 } else if (is_fake_stub_frame()) {
1132 // nothing to do
1133 #endif // SHARK
1134 } else {
1135 ShouldNotReachHere();
1136 }
1137 }
1139 void frame::nmethods_do(CodeBlobClosure* cf) {
1140 if (_cb != NULL && _cb->is_nmethod()) {
1141 cf->do_code_blob(_cb);
1142 }
1143 }
1146 void frame::gc_prologue() {
1147 if (is_interpreted_frame()) {
1148 // set bcx to bci to become methodOop position independent during GC
1149 interpreter_frame_set_bcx(interpreter_frame_bci());
1150 }
1151 }
1154 void frame::gc_epilogue() {
1155 if (is_interpreted_frame()) {
1156 // set bcx back to bcp for interpreter
1157 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp());
1158 }
1159 // call processor specific epilog function
1160 pd_gc_epilog();
1161 }
1164 # ifdef ENABLE_ZAP_DEAD_LOCALS
1166 void frame::CheckValueClosure::do_oop(oop* p) {
1167 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) {
1168 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1169 }
1170 }
1171 frame::CheckValueClosure frame::_check_value;
1174 void frame::CheckOopClosure::do_oop(oop* p) {
1175 if (*p != NULL && !(*p)->is_oop()) {
1176 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1177 }
1178 }
1179 frame::CheckOopClosure frame::_check_oop;
1181 void frame::check_derived_oop(oop* base, oop* derived) {
1182 _check_oop.do_oop(base);
1183 }
1186 void frame::ZapDeadClosure::do_oop(oop* p) {
1187 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p);
1188 // Need cast because on _LP64 the conversion to oop is ambiguous. Constant
1189 // can be either long or int.
1190 *p = (oop)(int)0xbabebabe;
1191 }
1192 frame::ZapDeadClosure frame::_zap_dead;
1194 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) {
1195 assert(thread == Thread::current(), "need to synchronize to do this to another thread");
1196 // Tracing - part 1
1197 if (TraceZapDeadLocals) {
1198 ResourceMark rm(thread);
1199 tty->print_cr("--------------------------------------------------------------------------------");
1200 tty->print("Zapping dead locals in ");
1201 print_on(tty);
1202 tty->cr();
1203 }
1204 // Zapping
1205 if (is_entry_frame ()) zap_dead_entry_locals (thread, map);
1206 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map);
1207 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map);
1209 else
1210 // could be is_runtime_frame
1211 // so remove error: ShouldNotReachHere();
1212 ;
1213 // Tracing - part 2
1214 if (TraceZapDeadLocals) {
1215 tty->cr();
1216 }
1217 }
1220 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) {
1221 // get current interpreter 'pc'
1222 assert(is_interpreted_frame(), "Not an interpreted frame");
1223 methodOop m = interpreter_frame_method();
1224 int bci = interpreter_frame_bci();
1226 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
1228 // process dynamic part
1229 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(),
1230 &_check_value);
1231 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(),
1232 &_check_oop );
1233 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(),
1234 &_zap_dead );
1236 // get frame map
1237 InterpreterOopMap mask;
1238 m->mask_for(bci, &mask);
1239 mask.iterate_all( &oop_blk, &value_blk, &dead_blk);
1240 }
1243 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) {
1245 ResourceMark rm(thread);
1246 assert(_cb != NULL, "sanity check");
1247 if (_cb->oop_maps() != NULL) {
1248 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value);
1249 }
1250 }
1253 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) {
1254 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented");
1255 }
1258 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) {
1259 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented");
1260 }
1262 # endif // ENABLE_ZAP_DEAD_LOCALS
1264 void frame::verify(const RegisterMap* map) {
1265 // for now make sure receiver type is correct
1266 if (is_interpreted_frame()) {
1267 methodOop method = interpreter_frame_method();
1268 guarantee(method->is_method(), "method is wrong in frame::verify");
1269 if (!method->is_static()) {
1270 // fetch the receiver
1271 oop* p = (oop*) interpreter_frame_local_at(0);
1272 // make sure we have the right receiver type
1273 }
1274 }
1275 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");)
1276 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, (RegisterMap*)map, false);
1277 }
1280 #ifdef ASSERT
1281 bool frame::verify_return_pc(address x) {
1282 if (StubRoutines::returns_to_call_stub(x)) {
1283 return true;
1284 }
1285 if (CodeCache::contains(x)) {
1286 return true;
1287 }
1288 if (Interpreter::contains(x)) {
1289 return true;
1290 }
1291 return false;
1292 }
1293 #endif
1296 #ifdef ASSERT
1297 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const {
1298 assert(is_interpreted_frame(), "Not an interpreted frame");
1299 // verify that the value is in the right part of the frame
1300 address low_mark = (address) interpreter_frame_monitor_end();
1301 address high_mark = (address) interpreter_frame_monitor_begin();
1302 address current = (address) value;
1304 const int monitor_size = frame::interpreter_frame_monitor_size();
1305 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*");
1306 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark");
1308 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*");
1309 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark");
1310 }
1311 #endif
1314 //-----------------------------------------------------------------------------------
1315 // StackFrameStream implementation
1317 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) {
1318 assert(thread->has_last_Java_frame(), "sanity check");
1319 _fr = thread->last_frame();
1320 _is_done = false;
1321 }