1 /*
2 * Copyright (c) 1997, 2014, 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 "classfile/systemDictionary.hpp"
27 #include "code/codeCache.hpp"
28 #include "code/icBuffer.hpp"
29 #include "code/nmethod.hpp"
30 #include "code/vtableStubs.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc_implementation/shared/markSweep.hpp"
34 #include "gc_interface/collectedHeap.hpp"
35 #include "interpreter/bytecodeHistogram.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/oop.inline.hpp"
40 #include "prims/privilegedStack.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/atomic.inline.hpp"
43 #include "runtime/frame.hpp"
44 #include "runtime/java.hpp"
45 #include "runtime/os.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "runtime/stubCodeGenerator.hpp"
48 #include "runtime/stubRoutines.hpp"
49 #include "runtime/thread.inline.hpp"
50 #include "runtime/vframe.hpp"
51 #include "runtime/vm_version.hpp"
52 #include "services/heapDumper.hpp"
53 #include "utilities/defaultStream.hpp"
54 #include "utilities/events.hpp"
55 #include "utilities/top.hpp"
56 #include "utilities/vmError.hpp"
57
58 #ifndef ASSERT
59 # ifdef _DEBUG
60 // NOTE: don't turn the lines below into a comment -- if you're getting
61 // a compile error here, change the settings to define ASSERT
62 ASSERT should be defined when _DEBUG is defined. It is not intended to be used for debugging
63 functions that do not slow down the system too much and thus can be left in optimized code.
64 On the other hand, the code should not be included in a production version.
65 # endif // _DEBUG
66 #endif // ASSERT
67
68
69 #ifdef _DEBUG
70 # ifndef ASSERT
71 configuration error: ASSERT must be defined in debug version
72 # endif // ASSERT
73 #endif // _DEBUG
74
75
76 #ifdef PRODUCT
77 # if -defined _DEBUG || -defined ASSERT
78 configuration error: ASSERT et al. must not be defined in PRODUCT version
79 # endif
80 #endif // PRODUCT
81
82 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
83
84 FormatBufferResource::FormatBufferResource(const char * format, ...)
85 : FormatBufferBase((char*)resource_allocate_bytes(RES_BUFSZ)) {
86 va_list argp;
87 va_start(argp, format);
88 jio_vsnprintf(_buf, RES_BUFSZ, format, argp);
89 va_end(argp);
90 }
91
92 ATTRIBUTE_PRINTF(1, 2)
93 void warning(const char* format, ...) {
94 if (PrintWarnings) {
95 FILE* const err = defaultStream::error_stream();
96 jio_fprintf(err, "%s warning: ", VM_Version::vm_name());
97 va_list ap;
98 va_start(ap, format);
99 vfprintf(err, format, ap);
100 va_end(ap);
101 fputc('\n', err);
102 }
103 if (BreakAtWarning) BREAKPOINT;
104 }
105
106 #ifndef PRODUCT
107
108 #define is_token_break(ch) (isspace(ch) || (ch) == ',')
109
110 static const char* last_file_name = NULL;
111 static int last_line_no = -1;
112
113 // assert/guarantee/... may happen very early during VM initialization.
114 // Don't rely on anything that is initialized by Threads::create_vm(). For
115 // example, don't use tty.
116 bool error_is_suppressed(const char* file_name, int line_no) {
117 // The following 1-element cache requires that passed-in
118 // file names are always only constant literals.
119 if (file_name == last_file_name && line_no == last_line_no) return true;
120
121 int file_name_len = (int)strlen(file_name);
122 char separator = os::file_separator()[0];
123 const char* base_name = strrchr(file_name, separator);
124 if (base_name == NULL)
125 base_name = file_name;
126
127 // scan the SuppressErrorAt option
128 const char* cp = SuppressErrorAt;
129 for (;;) {
130 const char* sfile;
131 int sfile_len;
132 int sline;
133 bool noisy;
134 while ((*cp) != '\0' && is_token_break(*cp)) cp++;
135 if ((*cp) == '\0') break;
136 sfile = cp;
137 while ((*cp) != '\0' && !is_token_break(*cp) && (*cp) != ':') cp++;
138 sfile_len = cp - sfile;
139 if ((*cp) == ':') cp++;
140 sline = 0;
141 while ((*cp) != '\0' && isdigit(*cp)) {
142 sline *= 10;
143 sline += (*cp) - '0';
144 cp++;
145 }
146 // "file:line!" means the assert suppression is not silent
147 noisy = ((*cp) == '!');
148 while ((*cp) != '\0' && !is_token_break(*cp)) cp++;
149 // match the line
150 if (sline != 0) {
151 if (sline != line_no) continue;
152 }
153 // match the file
154 if (sfile_len > 0) {
155 const char* look = file_name;
156 const char* look_max = file_name + file_name_len - sfile_len;
157 const char* foundp;
158 bool match = false;
159 while (!match
160 && (foundp = strchr(look, sfile[0])) != NULL
161 && foundp <= look_max) {
162 match = true;
163 for (int i = 1; i < sfile_len; i++) {
164 if (sfile[i] != foundp[i]) {
165 match = false;
166 break;
167 }
168 }
169 look = foundp + 1;
170 }
171 if (!match) continue;
172 }
173 // got a match!
174 if (noisy) {
175 fdStream out(defaultStream::output_fd());
176 out.print_raw("[error suppressed at ");
177 out.print_raw(base_name);
178 char buf[16];
179 jio_snprintf(buf, sizeof(buf), ":%d]", line_no);
180 out.print_raw_cr(buf);
181 } else {
182 // update 1-element cache for fast silent matches
183 last_file_name = file_name;
184 last_line_no = line_no;
185 }
186 return true;
187 }
188
189 if (!is_error_reported()) {
190 // print a friendly hint:
191 fdStream out(defaultStream::output_fd());
192 out.print_raw_cr("# To suppress the following error report, specify this argument");
193 out.print_raw ("# after -XX: or in .hotspotrc: SuppressErrorAt=");
194 out.print_raw (base_name);
195 char buf[16];
196 jio_snprintf(buf, sizeof(buf), ":%d", line_no);
197 out.print_raw_cr(buf);
198 }
199 return false;
200 }
201
202 #undef is_token_break
203
204 #else
205
206 // Place-holder for non-existent suppression check:
207 #define error_is_suppressed(file_name, line_no) (false)
208
209 #endif // !PRODUCT
210
211 void report_vm_error(const char* file, int line, const char* error_msg,
212 const char* detail_msg)
213 {
214 if (Debugging || error_is_suppressed(file, line)) return;
215 Thread* const thread = ThreadLocalStorage::get_thread_slow();
216 VMError err(thread, file, line, error_msg, detail_msg);
217 err.report_and_die();
218 }
219
220 void report_fatal(const char* file, int line, const char* message)
221 {
222 report_vm_error(file, line, "fatal error", message);
223 }
224
225 void report_vm_out_of_memory(const char* file, int line, size_t size,
226 VMErrorType vm_err_type, const char* message) {
227 if (Debugging) return;
228
229 Thread* thread = ThreadLocalStorage::get_thread_slow();
230 VMError(thread, file, line, size, vm_err_type, message).report_and_die();
231
232 // The UseOSErrorReporting option in report_and_die() may allow a return
233 // to here. If so then we'll have to figure out how to handle it.
234 guarantee(false, "report_and_die() should not return here");
235 }
236
237 void report_should_not_call(const char* file, int line) {
238 report_vm_error(file, line, "ShouldNotCall()");
239 }
240
241 void report_should_not_reach_here(const char* file, int line) {
242 report_vm_error(file, line, "ShouldNotReachHere()");
243 }
244
245 void report_unimplemented(const char* file, int line) {
246 report_vm_error(file, line, "Unimplemented()");
247 }
248
249 void report_untested(const char* file, int line, const char* message) {
250 #ifndef PRODUCT
251 warning("Untested: %s in %s: %d\n", message, file, line);
252 #endif // !PRODUCT
253 }
254
255 void report_out_of_shared_space(SharedSpaceType shared_space) {
256 static const char* name[] = {
257 "shared read only space",
258 "shared read write space",
259 "shared miscellaneous data space",
260 "shared miscellaneous code space"
261 };
262 static const char* flag[] = {
263 "SharedReadOnlySize",
264 "SharedReadWriteSize",
265 "SharedMiscDataSize",
266 "SharedMiscCodeSize"
267 };
268
269 warning("\nThe %s is not large enough\n"
270 "to preload requested classes. Use -XX:%s=<size>\n"
271 "to increase the initial size of %s.\n",
272 name[shared_space], flag[shared_space], name[shared_space]);
273 exit(2);
274 }
275
276 void report_java_out_of_memory(const char* message) {
277 static jint out_of_memory_reported = 0;
278
279 // A number of threads may attempt to report OutOfMemoryError at around the
280 // same time. To avoid dumping the heap or executing the data collection
281 // commands multiple times we just do it once when the first threads reports
282 // the error.
283 if (Atomic::cmpxchg(1, &out_of_memory_reported, 0) == 0) {
284 // create heap dump before OnOutOfMemoryError commands are executed
285 if (HeapDumpOnOutOfMemoryError) {
286 tty->print_cr("java.lang.OutOfMemoryError: %s", message);
287 HeapDumper::dump_heap_from_oome();
288 }
289
290 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
291 VMError err(message);
292 err.report_java_out_of_memory();
293 }
294 }
295 }
296
297 static bool error_reported = false;
298
299 // call this when the VM is dying--it might loosen some asserts
300 void set_error_reported() {
301 error_reported = true;
302 }
303
304 bool is_error_reported() {
305 return error_reported;
306 }
307
308 #ifndef PRODUCT
309 #include <signal.h>
310
311 void test_error_handler() {
312 uintx test_num = ErrorHandlerTest;
313 if (test_num == 0) return;
314
315 // If asserts are disabled, use the corresponding guarantee instead.
316 size_t n = test_num;
317 NOT_DEBUG(if (n <= 2) n += 2);
318
319 const char* const str = "hello";
320 const size_t num = (size_t)os::vm_page_size();
321
322 const char* const eol = os::line_separator();
323 const char* const msg = "this message should be truncated during formatting";
324 char * const dataPtr = NULL; // bad data pointer
325 const void (*funcPtr)(void) = (const void(*)()) 0xF; // bad function pointer
326
327 // Keep this in sync with test/runtime/6888954/vmerrors.sh.
328 switch (n) {
329 case 1: assert(str == NULL, "expected null");
330 case 2: assert(num == 1023 && *str == 'X',
331 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
332 case 3: guarantee(str == NULL, "expected null");
333 case 4: guarantee(num == 1023 && *str == 'X',
334 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
335 case 5: fatal("expected null");
336 case 6: fatal(err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
337 case 7: fatal(err_msg("%s%s# %s%s# %s%s# %s%s# %s%s# "
338 "%s%s# %s%s# %s%s# %s%s# %s%s# "
339 "%s%s# %s%s# %s%s# %s%s# %s",
340 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
341 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
342 msg, eol, msg, eol, msg, eol, msg, eol, msg));
343 case 8: vm_exit_out_of_memory(num, OOM_MALLOC_ERROR, "ChunkPool::allocate");
344 case 9: ShouldNotCallThis();
345 case 10: ShouldNotReachHere();
346 case 11: Unimplemented();
347 // There's no guarantee the bad data pointer will crash us
348 // so "break" out to the ShouldNotReachHere().
349 case 12: *dataPtr = '\0'; break;
350 // There's no guarantee the bad function pointer will crash us
351 // so "break" out to the ShouldNotReachHere().
352 case 13: (*funcPtr)(); break;
353
354 default: tty->print_cr("ERROR: %d: unexpected test_num value.", n);
355 }
356 ShouldNotReachHere();
357 }
358 #endif // !PRODUCT
359
360 // ------ helper functions for debugging go here ------------
361
362 // All debug entries should be wrapped with a stack allocated
363 // Command object. It makes sure a resource mark is set and
364 // flushes the logfile to prevent file sharing problems.
365
366 class Command : public StackObj {
367 private:
368 ResourceMark rm;
369 ResetNoHandleMark rnhm;
370 HandleMark hm;
371 bool debug_save;
372 public:
373 static int level;
374 Command(const char* str) {
375 debug_save = Debugging;
376 Debugging = true;
377 if (level++ > 0) return;
378 tty->cr();
379 tty->print_cr("\"Executing %s\"", str);
380 }
381
382 ~Command() {
383 tty->flush();
384 Debugging = debug_save;
385 level--;
386 }
387 };
388
389 int Command::level = 0;
390
391 #ifndef PRODUCT
392
393 extern "C" void blob(CodeBlob* cb) {
394 Command c("blob");
395 cb->print();
396 }
397
398
399 extern "C" void dump_vtable(address p) {
400 Command c("dump_vtable");
401 Klass* k = (Klass*)p;
402 InstanceKlass::cast(k)->vtable()->print();
403 }
404
405
406 extern "C" void nm(intptr_t p) {
407 // Actually we look through all CodeBlobs (the nm name has been kept for backwards compatability)
408 Command c("nm");
409 CodeBlob* cb = CodeCache::find_blob((address)p);
410 if (cb == NULL) {
411 tty->print_cr("NULL");
412 } else {
413 cb->print();
414 }
415 }
416
417
418 extern "C" void disnm(intptr_t p) {
419 Command c("disnm");
420 CodeBlob* cb = CodeCache::find_blob((address) p);
421 nmethod* nm = cb->as_nmethod_or_null();
422 if (nm) {
423 nm->print();
424 Disassembler::decode(nm);
425 } else {
426 cb->print();
427 Disassembler::decode(cb);
428 }
429 }
430
431
432 extern "C" void printnm(intptr_t p) {
433 char buffer[256];
434 sprintf(buffer, "printnm: " INTPTR_FORMAT, p);
435 Command c(buffer);
436 CodeBlob* cb = CodeCache::find_blob((address) p);
437 if (cb->is_nmethod()) {
438 nmethod* nm = (nmethod*)cb;
439 nm->print_nmethod(true);
440 }
441 }
442
443
444 extern "C" void universe() {
445 Command c("universe");
446 Universe::print();
447 }
448
449
450 extern "C" void verify() {
451 // try to run a verify on the entire system
452 // note: this may not be safe if we're not at a safepoint; for debugging,
453 // this manipulates the safepoint settings to avoid assertion failures
454 Command c("universe verify");
455 bool safe = SafepointSynchronize::is_at_safepoint();
456 if (!safe) {
457 tty->print_cr("warning: not at safepoint -- verify may fail");
458 SafepointSynchronize::set_is_at_safepoint();
459 }
460 // Ensure Eden top is correct before verification
461 Universe::heap()->prepare_for_verify();
462 Universe::verify();
463 if (!safe) SafepointSynchronize::set_is_not_at_safepoint();
464 }
465
466
467 extern "C" void pp(void* p) {
468 Command c("pp");
469 FlagSetting fl(PrintVMMessages, true);
470 FlagSetting f2(DisplayVMOutput, true);
471 if (Universe::heap()->is_in(p)) {
472 oop obj = oop(p);
473 obj->print();
474 } else {
475 tty->print(PTR_FORMAT, p);
476 }
477 }
478
479
480 // pv: print vm-printable object
481 extern "C" void pa(intptr_t p) { ((AllocatedObj*) p)->print(); }
482 extern "C" void findpc(intptr_t x);
483
484 #endif // !PRODUCT
485
486 extern "C" void ps() { // print stack
487 if (Thread::current() == NULL) return;
488 Command c("ps");
489
490
491 // Prints the stack of the current Java thread
492 JavaThread* p = JavaThread::active();
493 tty->print(" for thread: ");
494 p->print();
495 tty->cr();
496
497 if (p->has_last_Java_frame()) {
498 // If the last_Java_fp is set we are in C land and
499 // can call the standard stack_trace function.
500 #ifdef PRODUCT
501 p->print_stack();
502 } else {
503 tty->print_cr("Cannot find the last Java frame, printing stack disabled.");
504 #else // !PRODUCT
505 p->trace_stack();
506 } else {
507 frame f = os::current_frame();
508 RegisterMap reg_map(p);
509 f = f.sender(®_map);
510 tty->print("(guessing starting frame id=%#p based on current fp)\n", f.id());
511 p->trace_stack_from(vframe::new_vframe(&f, ®_map, p));
512 pd_ps(f);
513 #endif // PRODUCT
514 }
515
516 }
517
518 extern "C" void pfl() {
519 // print frame layout
520 Command c("pfl");
521 JavaThread* p = JavaThread::active();
522 tty->print(" for thread: ");
523 p->print();
524 tty->cr();
525 if (p->has_last_Java_frame()) {
526 p->print_frame_layout();
527 }
528 }
529
530 #ifndef PRODUCT
531
532 extern "C" void psf() { // print stack frames
533 {
534 Command c("psf");
535 JavaThread* p = JavaThread::active();
536 tty->print(" for thread: ");
537 p->print();
538 tty->cr();
539 if (p->has_last_Java_frame()) {
540 p->trace_frames();
541 }
542 }
543 }
544
545
546 extern "C" void threads() {
547 Command c("threads");
548 Threads::print(false, true);
549 }
550
551
552 extern "C" void psd() {
553 Command c("psd");
554 SystemDictionary::print();
555 }
556
557
558 extern "C" void safepoints() {
559 Command c("safepoints");
560 SafepointSynchronize::print_state();
561 }
562
563 #endif // !PRODUCT
564
565 extern "C" void pss() { // print all stacks
566 if (Thread::current() == NULL) return;
567 Command c("pss");
568 Threads::print(true, PRODUCT_ONLY(false) NOT_PRODUCT(true));
569 }
570
571 #ifndef PRODUCT
572
573 extern "C" void debug() { // to set things up for compiler debugging
574 Command c("debug");
575 WizardMode = true;
576 PrintVMMessages = PrintCompilation = true;
577 PrintInlining = PrintAssembly = true;
578 tty->flush();
579 }
580
581
582 extern "C" void ndebug() { // undo debug()
583 Command c("ndebug");
584 PrintCompilation = false;
585 PrintInlining = PrintAssembly = false;
586 tty->flush();
587 }
588
589
590 extern "C" void flush() {
591 Command c("flush");
592 tty->flush();
593 }
594
595 extern "C" void events() {
596 Command c("events");
597 Events::print();
598 }
599
600 extern "C" Method* findm(intptr_t pc) {
601 Command c("findm");
602 nmethod* nm = CodeCache::find_nmethod((address)pc);
603 return (nm == NULL) ? (Method*)NULL : nm->method();
604 }
605
606
607 extern "C" nmethod* findnm(intptr_t addr) {
608 Command c("findnm");
609 return CodeCache::find_nmethod((address)addr);
610 }
611
612 // Another interface that isn't ambiguous in dbx.
613 // Can we someday rename the other find to hsfind?
614 extern "C" void hsfind(intptr_t x) {
615 Command c("hsfind");
616 os::print_location(tty, x, false);
617 }
618
619
620 extern "C" void find(intptr_t x) {
621 Command c("find");
622 os::print_location(tty, x, false);
623 }
624
625
626 extern "C" void findpc(intptr_t x) {
627 Command c("findpc");
628 os::print_location(tty, x, true);
629 }
630
631
632 // Need method pointer to find bcp, when not in permgen.
633 extern "C" void findbcp(intptr_t method, intptr_t bcp) {
634 Command c("findbcp");
635 Method* mh = (Method*)method;
636 if (!mh->is_native()) {
637 tty->print_cr("bci_from(%p) = %d; print_codes():",
638 mh, mh->bci_from(address(bcp)));
639 mh->print_codes_on(tty);
640 }
641 }
642
643 // int versions of all methods to avoid having to type type casts in the debugger
644
645 void pp(intptr_t p) { pp((void*)p); }
646 void pp(oop p) { pp((void*)p); }
647
648 void help() {
649 Command c("help");
650 tty->print_cr("basic");
651 tty->print_cr(" pp(void* p) - try to make sense of p");
652 tty->print_cr(" pv(intptr_t p)- ((PrintableResourceObj*) p)->print()");
653 tty->print_cr(" ps() - print current thread stack");
654 tty->print_cr(" pss() - print all thread stacks");
655 tty->print_cr(" pm(int pc) - print Method* given compiled PC");
656 tty->print_cr(" findm(intptr_t pc) - finds Method*");
657 tty->print_cr(" find(intptr_t x) - finds & prints nmethod/stub/bytecode/oop based on pointer into it");
658 tty->print_cr(" pns(void* sp, void* fp, void* pc) - print native (i.e. mixed) stack trace. E.g.");
659 tty->print_cr(" pns($sp, $rbp, $pc) on Linux/amd64 and Solaris/amd64 or");
660 tty->print_cr(" pns($sp, $ebp, $pc) on Linux/x86 or");
661 tty->print_cr(" pns($sp, 0, $pc) on Linux/ppc64 or");
662 tty->print_cr(" pns($sp + 0x7ff, 0, $pc) on Solaris/SPARC");
663 tty->print_cr(" - in gdb do 'set overload-resolution off' before calling pns()");
664 tty->print_cr(" - in dbx do 'frame 1' before calling pns()");
665
666 tty->print_cr("misc.");
667 tty->print_cr(" flush() - flushes the log file");
668 tty->print_cr(" events() - dump events from ring buffers");
669
670
671 tty->print_cr("compiler debugging");
672 tty->print_cr(" debug() - to set things up for compiler debugging");
673 tty->print_cr(" ndebug() - undo debug");
674 }
675
676 #endif // !PRODUCT
677
678 void print_native_stack(outputStream* st, frame fr, Thread* t, char* buf, int buf_size) {
679
680 // see if it's a valid frame
681 if (fr.pc()) {
682 st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
683
684 int count = 0;
685 while (count++ < StackPrintLimit) {
686 fr.print_on_error(st, buf, buf_size);
687 st->cr();
688 // Compiled code may use EBP register on x86 so it looks like
689 // non-walkable C frame. Use frame.sender() for java frames.
690 if (t && t->is_Java_thread()) {
691 // Catch very first native frame by using stack address.
692 // For JavaThread stack_base and stack_size should be set.
693 if (!t->on_local_stack((address)(fr.real_fp() + 1))) {
694 break;
695 }
696 if (fr.is_java_frame() || fr.is_native_frame() || fr.is_runtime_frame()) {
697 RegisterMap map((JavaThread*)t, false); // No update
698 fr = fr.sender(&map);
699 } else {
700 fr = os::get_sender_for_C_frame(&fr);
701 }
702 } else {
703 // is_first_C_frame() does only simple checks for frame pointer,
704 // it will pass if java compiled code has a pointer in EBP.
705 if (os::is_first_C_frame(&fr)) break;
706 fr = os::get_sender_for_C_frame(&fr);
707 }
708 }
709
710 if (count > StackPrintLimit) {
711 st->print_cr("...<more frames>...");
712 }
713
714 st->cr();
715 }
716 }
717
718 #ifndef PRODUCT
719
720 extern "C" void pns(void* sp, void* fp, void* pc) { // print native stack
721 Command c("pns");
722 static char buf[O_BUFLEN];
723 Thread* t = ThreadLocalStorage::get_thread_slow();
724 // Call generic frame constructor (certain arguments may be ignored)
725 frame fr(sp, fp, pc);
726 print_native_stack(tty, fr, t, buf, sizeof(buf));
727 }
728
729 #endif // !PRODUCT