1 /*
2 * Copyright (c) 1997, 2017, 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/frame.hpp"
43 #include "runtime/java.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/stubCodeGenerator.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "runtime/thread.inline.hpp"
48 #include "runtime/vframe.hpp"
49 #include "services/heapDumper.hpp"
50 #include "utilities/defaultStream.hpp"
51 #include "utilities/events.hpp"
52 #include "utilities/top.hpp"
53 #include "utilities/vmError.hpp"
54 #ifdef TARGET_OS_FAMILY_linux
55 # include "os_linux.inline.hpp"
56 #endif
57 #ifdef TARGET_OS_FAMILY_solaris
58 # include "os_solaris.inline.hpp"
59 #endif
60 #ifdef TARGET_OS_FAMILY_windows
61 # include "os_windows.inline.hpp"
62 #endif
63 #ifdef TARGET_OS_FAMILY_bsd
64 # include "os_bsd.inline.hpp"
65 #endif
66
67 #ifndef ASSERT
68 # ifdef _DEBUG
69 // NOTE: don't turn the lines below into a comment -- if you're getting
70 // a compile error here, change the settings to define ASSERT
71 ASSERT should be defined when _DEBUG is defined. It is not intended to be used for debugging
72 functions that do not slow down the system too much and thus can be left in optimized code.
73 On the other hand, the code should not be included in a production version.
74 # endif // _DEBUG
75 #endif // ASSERT
76
77
78 #ifdef _DEBUG
79 # ifndef ASSERT
80 configuration error: ASSERT must be defined in debug version
81 # endif // ASSERT
82 #endif // _DEBUG
83
84
85 #ifdef PRODUCT
86 # if -defined _DEBUG || -defined ASSERT
87 configuration error: ASSERT et al. must not be defined in PRODUCT version
88 # endif
89 #endif // PRODUCT
90
91 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
92
93 FormatBufferResource::FormatBufferResource(const char * format, ...)
94 : FormatBufferBase((char*)resource_allocate_bytes(RES_BUFSZ)) {
95 va_list argp;
96 va_start(argp, format);
97 jio_vsnprintf(_buf, RES_BUFSZ, format, argp);
98 va_end(argp);
99 }
100
101 ATTRIBUTE_PRINTF(1, 2)
102 void warning(const char* format, ...) {
103 if (PrintWarnings) {
104 FILE* const err = defaultStream::error_stream();
105 jio_fprintf(err, "%s warning: ", VM_Version::vm_name());
106 va_list ap;
107 va_start(ap, format);
108 vfprintf(err, format, ap);
109 va_end(ap);
110 fputc('\n', err);
111 }
112 if (BreakAtWarning) BREAKPOINT;
113 }
114
115 #ifndef PRODUCT
116
117 #define is_token_break(ch) (isspace(ch) || (ch) == ',')
118
119 static const char* last_file_name = NULL;
120 static int last_line_no = -1;
121
122 // assert/guarantee/... may happen very early during VM initialization.
123 // Don't rely on anything that is initialized by Threads::create_vm(). For
124 // example, don't use tty.
125 bool error_is_suppressed(const char* file_name, int line_no) {
126 // The following 1-element cache requires that passed-in
127 // file names are always only constant literals.
128 if (file_name == last_file_name && line_no == last_line_no) return true;
129
130 int file_name_len = (int)strlen(file_name);
131 char separator = os::file_separator()[0];
132 const char* base_name = strrchr(file_name, separator);
133 if (base_name == NULL)
134 base_name = file_name;
135
136 // scan the SuppressErrorAt option
137 const char* cp = SuppressErrorAt;
138 for (;;) {
139 const char* sfile;
140 int sfile_len;
141 int sline;
142 bool noisy;
143 while ((*cp) != '\0' && is_token_break(*cp)) cp++;
144 if ((*cp) == '\0') break;
145 sfile = cp;
146 while ((*cp) != '\0' && !is_token_break(*cp) && (*cp) != ':') cp++;
147 sfile_len = cp - sfile;
148 if ((*cp) == ':') cp++;
149 sline = 0;
150 while ((*cp) != '\0' && isdigit(*cp)) {
151 sline *= 10;
152 sline += (*cp) - '0';
153 cp++;
154 }
155 // "file:line!" means the assert suppression is not silent
156 noisy = ((*cp) == '!');
157 while ((*cp) != '\0' && !is_token_break(*cp)) cp++;
158 // match the line
159 if (sline != 0) {
160 if (sline != line_no) continue;
161 }
162 // match the file
163 if (sfile_len > 0) {
164 const char* look = file_name;
165 const char* look_max = file_name + file_name_len - sfile_len;
166 const char* foundp;
167 bool match = false;
168 while (!match
169 && (foundp = strchr(look, sfile[0])) != NULL
170 && foundp <= look_max) {
171 match = true;
172 for (int i = 1; i < sfile_len; i++) {
173 if (sfile[i] != foundp[i]) {
174 match = false;
175 break;
176 }
177 }
178 look = foundp + 1;
179 }
180 if (!match) continue;
181 }
182 // got a match!
183 if (noisy) {
184 fdStream out(defaultStream::output_fd());
185 out.print_raw("[error suppressed at ");
186 out.print_raw(base_name);
187 char buf[16];
188 jio_snprintf(buf, sizeof(buf), ":%d]", line_no);
189 out.print_raw_cr(buf);
190 } else {
191 // update 1-element cache for fast silent matches
192 last_file_name = file_name;
193 last_line_no = line_no;
194 }
195 return true;
196 }
197
198 if (!is_error_reported()) {
199 // print a friendly hint:
200 fdStream out(defaultStream::output_fd());
201 out.print_raw_cr("# To suppress the following error report, specify this argument");
202 out.print_raw ("# after -XX: or in .hotspotrc: SuppressErrorAt=");
203 out.print_raw (base_name);
204 char buf[16];
205 jio_snprintf(buf, sizeof(buf), ":%d", line_no);
206 out.print_raw_cr(buf);
207 }
208 return false;
209 }
210
211 #undef is_token_break
212
213 #else
214
215 // Place-holder for non-existent suppression check:
216 #define error_is_suppressed(file_name, line_no) (false)
217
218 #endif // !PRODUCT
219
220 void report_vm_error(const char* file, int line, const char* error_msg,
221 const char* detail_msg)
222 {
223 if (Debugging || error_is_suppressed(file, line)) return;
224 Thread* const thread = ThreadLocalStorage::get_thread_slow();
225 VMError err(thread, file, line, error_msg, detail_msg);
226 err.report_and_die();
227 }
228
229 void report_fatal(const char* file, int line, const char* message)
230 {
231 report_vm_error(file, line, "fatal error", message);
232 }
233
234 void report_vm_out_of_memory(const char* file, int line, size_t size,
235 VMErrorType vm_err_type, const char* message) {
236 if (Debugging) return;
237
238 Thread* thread = ThreadLocalStorage::get_thread_slow();
239 VMError(thread, file, line, size, vm_err_type, message).report_and_die();
240
241 // The UseOSErrorReporting option in report_and_die() may allow a return
242 // to here. If so then we'll have to figure out how to handle it.
243 guarantee(false, "report_and_die() should not return here");
244 }
245
246 void report_should_not_call(const char* file, int line) {
247 report_vm_error(file, line, "ShouldNotCall()");
248 }
249
250 void report_should_not_reach_here(const char* file, int line) {
251 report_vm_error(file, line, "ShouldNotReachHere()");
252 }
253
254 void report_unimplemented(const char* file, int line) {
255 report_vm_error(file, line, "Unimplemented()");
256 }
257
258 void report_untested(const char* file, int line, const char* message) {
259 #ifndef PRODUCT
260 warning("Untested: %s in %s: %d\n", message, file, line);
261 #endif // !PRODUCT
262 }
263
264 void report_out_of_shared_space(SharedSpaceType shared_space) {
265 static const char* name[] = {
266 "native memory for metadata",
267 "shared read only space",
268 "shared read write space",
269 "shared miscellaneous data space",
270 "shared miscellaneous code space"
271 };
272 static const char* flag[] = {
273 "Metaspace",
274 "SharedReadOnlySize",
275 "SharedReadWriteSize",
276 "SharedMiscDataSize",
277 "SharedMiscCodeSize"
278 };
279
280 warning("\nThe %s is not large enough\n"
281 "to preload requested classes. Use -XX:%s=<size>\n"
282 "to increase the initial size of %s.\n",
283 name[shared_space], flag[shared_space], name[shared_space]);
284 exit(2);
285 }
286
287 void report_java_out_of_memory(const char* message) {
288 static jint out_of_memory_reported = 0;
289
290 // A number of threads may attempt to report OutOfMemoryError at around the
291 // same time. To avoid dumping the heap or executing the data collection
292 // commands multiple times we just do it once when the first threads reports
293 // the error.
294 if (Atomic::cmpxchg(1, &out_of_memory_reported, 0) == 0) {
295 // create heap dump before OnOutOfMemoryError commands are executed
296 if (HeapDumpOnOutOfMemoryError) {
297 tty->print_cr("java.lang.OutOfMemoryError: %s", message);
298 HeapDumper::dump_heap_from_oome();
299 }
300
301 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
302 VMError err(message);
303 err.report_java_out_of_memory();
304 }
305
306 if (CrashOnOutOfMemoryError) {
307 tty->print_cr("Aborting due to java.lang.OutOfMemoryError: %s", message);
308 fatal(err_msg("OutOfMemory encountered: %s", message));
309 }
310
311 if (ExitOnOutOfMemoryError) {
312 tty->print_cr("Terminating due to java.lang.OutOfMemoryError: %s", message);
313 exit(3);
314 }
315 }
316 }
317
318 void report_insufficient_metaspace(size_t required_size) {
319 warning("\nThe MaxMetaspaceSize of " SIZE_FORMAT " bytes is not large enough.\n"
320 "Either don't specify the -XX:MaxMetaspaceSize=<size>\n"
321 "or increase the size to at least " SIZE_FORMAT ".\n",
322 MaxMetaspaceSize, required_size);
323 exit(2);
324 }
325
326 static bool error_reported = false;
327
328 // call this when the VM is dying--it might loosen some asserts
329 void set_error_reported() {
330 error_reported = true;
331 }
332
333 bool is_error_reported() {
334 return error_reported;
335 }
336
337 #ifndef PRODUCT
338 #include <signal.h>
339
340 void test_error_handler() {
341 uintx test_num = ErrorHandlerTest;
342 if (test_num == 0) return;
343
344 // If asserts are disabled, use the corresponding guarantee instead.
345 size_t n = test_num;
346 NOT_DEBUG(if (n <= 2) n += 2);
347
348 const char* const str = "hello";
349 const size_t num = (size_t)os::vm_page_size();
350
351 const char* const eol = os::line_separator();
352 const char* const msg = "this message should be truncated during formatting";
353 char * const dataPtr = NULL; // bad data pointer
354 const void (*funcPtr)(void) = (const void(*)()) 0xF; // bad function pointer
355
356 // Keep this in sync with test/runtime/6888954/vmerrors.sh.
357 switch (n) {
358 case 1: assert(str == NULL, "expected null");
359 case 2: assert(num == 1023 && *str == 'X',
360 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
361 case 3: guarantee(str == NULL, "expected null");
362 case 4: guarantee(num == 1023 && *str == 'X',
363 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
364 case 5: fatal("expected null");
365 case 6: fatal(err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
366 case 7: fatal(err_msg("%s%s# %s%s# %s%s# %s%s# %s%s# "
367 "%s%s# %s%s# %s%s# %s%s# %s%s# "
368 "%s%s# %s%s# %s%s# %s%s# %s",
369 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
370 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
371 msg, eol, msg, eol, msg, eol, msg, eol, msg));
372 case 8: vm_exit_out_of_memory(num, OOM_MALLOC_ERROR, "ChunkPool::allocate");
373 case 9: ShouldNotCallThis();
374 case 10: ShouldNotReachHere();
375 case 11: Unimplemented();
376 // There's no guarantee the bad data pointer will crash us
377 // so "break" out to the ShouldNotReachHere().
378 case 12: *dataPtr = '\0'; break;
379 // There's no guarantee the bad function pointer will crash us
380 // so "break" out to the ShouldNotReachHere().
381 case 13: (*funcPtr)(); break;
382
383 default: tty->print_cr("ERROR: %d: unexpected test_num value.", n);
384 }
385 ShouldNotReachHere();
386 }
387 #endif // !PRODUCT
388
389 // ------ helper functions for debugging go here ------------
390
391 // All debug entries should be wrapped with a stack allocated
392 // Command object. It makes sure a resource mark is set and
393 // flushes the logfile to prevent file sharing problems.
394
395 class Command : public StackObj {
396 private:
397 ResourceMark rm;
398 ResetNoHandleMark rnhm;
399 HandleMark hm;
400 bool debug_save;
401 public:
402 static int level;
403 Command(const char* str) {
404 debug_save = Debugging;
405 Debugging = true;
406 if (level++ > 0) return;
407 tty->cr();
408 tty->print_cr("\"Executing %s\"", str);
409 }
410
411 ~Command() {
412 tty->flush();
413 Debugging = debug_save;
414 level--;
415 }
416 };
417
418 int Command::level = 0;
419
420 #ifndef PRODUCT
421
422 extern "C" void blob(CodeBlob* cb) {
423 Command c("blob");
424 cb->print();
425 }
426
427
428 extern "C" void dump_vtable(address p) {
429 Command c("dump_vtable");
430 Klass* k = (Klass*)p;
431 InstanceKlass::cast(k)->vtable()->print();
432 }
433
434
435 extern "C" void nm(intptr_t p) {
436 // Actually we look through all CodeBlobs (the nm name has been kept for backwards compatability)
437 Command c("nm");
438 CodeBlob* cb = CodeCache::find_blob((address)p);
439 if (cb == NULL) {
440 tty->print_cr("NULL");
441 } else {
442 cb->print();
443 }
444 }
445
446
447 extern "C" void disnm(intptr_t p) {
448 Command c("disnm");
449 CodeBlob* cb = CodeCache::find_blob((address) p);
450 nmethod* nm = cb->as_nmethod_or_null();
451 if (nm) {
452 nm->print();
453 Disassembler::decode(nm);
454 } else {
455 cb->print();
456 Disassembler::decode(cb);
457 }
458 }
459
460
461 extern "C" void printnm(intptr_t p) {
462 char buffer[256];
463 sprintf(buffer, "printnm: " INTPTR_FORMAT, p);
464 Command c(buffer);
465 CodeBlob* cb = CodeCache::find_blob((address) p);
466 if (cb->is_nmethod()) {
467 nmethod* nm = (nmethod*)cb;
468 nm->print_nmethod(true);
469 }
470 }
471
472
473 extern "C" void universe() {
474 Command c("universe");
475 Universe::print();
476 }
477
478
479 extern "C" void verify() {
480 // try to run a verify on the entire system
481 // note: this may not be safe if we're not at a safepoint; for debugging,
482 // this manipulates the safepoint settings to avoid assertion failures
483 Command c("universe verify");
484 bool safe = SafepointSynchronize::is_at_safepoint();
485 if (!safe) {
486 tty->print_cr("warning: not at safepoint -- verify may fail");
487 SafepointSynchronize::set_is_at_safepoint();
488 }
489 // Ensure Eden top is correct before verification
490 Universe::heap()->prepare_for_verify();
491 Universe::verify();
492 if (!safe) SafepointSynchronize::set_is_not_at_safepoint();
493 }
494
495
496 extern "C" void pp(void* p) {
497 Command c("pp");
498 FlagSetting fl(PrintVMMessages, true);
499 FlagSetting f2(DisplayVMOutput, true);
500 if (Universe::heap()->is_in(p)) {
501 oop obj = oop(p);
502 obj->print();
503 } else {
504 tty->print(PTR_FORMAT, p);
505 }
506 }
507
508
509 // pv: print vm-printable object
510 extern "C" void pa(intptr_t p) { ((AllocatedObj*) p)->print(); }
511 extern "C" void findpc(intptr_t x);
512
513 #endif // !PRODUCT
514
515 extern "C" void ps() { // print stack
516 if (Thread::current() == NULL) return;
517 Command c("ps");
518
519
520 // Prints the stack of the current Java thread
521 JavaThread* p = JavaThread::active();
522 tty->print(" for thread: ");
523 p->print();
524 tty->cr();
525
526 if (p->has_last_Java_frame()) {
527 // If the last_Java_fp is set we are in C land and
528 // can call the standard stack_trace function.
529 #ifdef PRODUCT
530 p->print_stack();
531 } else {
532 tty->print_cr("Cannot find the last Java frame, printing stack disabled.");
533 #else // !PRODUCT
534 p->trace_stack();
535 } else {
536 frame f = os::current_frame();
537 RegisterMap reg_map(p);
538 f = f.sender(®_map);
539 tty->print("(guessing starting frame id=%#p based on current fp)\n", f.id());
540 p->trace_stack_from(vframe::new_vframe(&f, ®_map, p));
541 pd_ps(f);
542 #endif // PRODUCT
543 }
544
545 }
546
547 extern "C" void pfl() {
548 // print frame layout
549 Command c("pfl");
550 JavaThread* p = JavaThread::active();
551 tty->print(" for thread: ");
552 p->print();
553 tty->cr();
554 if (p->has_last_Java_frame()) {
555 p->print_frame_layout();
556 }
557 }
558
559 #ifndef PRODUCT
560
561 extern "C" void psf() { // print stack frames
562 {
563 Command c("psf");
564 JavaThread* p = JavaThread::active();
565 tty->print(" for thread: ");
566 p->print();
567 tty->cr();
568 if (p->has_last_Java_frame()) {
569 p->trace_frames();
570 }
571 }
572 }
573
574
575 extern "C" void threads() {
576 Command c("threads");
577 Threads::print(false, true);
578 }
579
580
581 extern "C" void psd() {
582 Command c("psd");
583 SystemDictionary::print();
584 }
585
586
587 extern "C" void safepoints() {
588 Command c("safepoints");
589 SafepointSynchronize::print_state();
590 }
591
592 #endif // !PRODUCT
593
594 extern "C" void pss() { // print all stacks
595 if (Thread::current() == NULL) return;
596 Command c("pss");
597 Threads::print(true, PRODUCT_ONLY(false) NOT_PRODUCT(true));
598 }
599
600 #ifndef PRODUCT
601
602 extern "C" void debug() { // to set things up for compiler debugging
603 Command c("debug");
604 WizardMode = true;
605 PrintVMMessages = PrintCompilation = true;
606 PrintInlining = PrintAssembly = true;
607 tty->flush();
608 }
609
610
611 extern "C" void ndebug() { // undo debug()
612 Command c("ndebug");
613 PrintCompilation = false;
614 PrintInlining = PrintAssembly = false;
615 tty->flush();
616 }
617
618
619 extern "C" void flush() {
620 Command c("flush");
621 tty->flush();
622 }
623
624 extern "C" void events() {
625 Command c("events");
626 Events::print();
627 }
628
629 extern "C" Method* findm(intptr_t pc) {
630 Command c("findm");
631 nmethod* nm = CodeCache::find_nmethod((address)pc);
632 return (nm == NULL) ? (Method*)NULL : nm->method();
633 }
634
635
636 extern "C" nmethod* findnm(intptr_t addr) {
637 Command c("findnm");
638 return CodeCache::find_nmethod((address)addr);
639 }
640
641 // Another interface that isn't ambiguous in dbx.
642 // Can we someday rename the other find to hsfind?
643 extern "C" void hsfind(intptr_t x) {
644 Command c("hsfind");
645 os::print_location(tty, x, false);
646 }
647
648
649 extern "C" void find(intptr_t x) {
650 Command c("find");
651 os::print_location(tty, x, false);
652 }
653
654
655 extern "C" void findpc(intptr_t x) {
656 Command c("findpc");
657 os::print_location(tty, x, true);
658 }
659
660
661 // Need method pointer to find bcp, when not in permgen.
662 extern "C" void findbcp(intptr_t method, intptr_t bcp) {
663 Command c("findbcp");
664 Method* mh = (Method*)method;
665 if (!mh->is_native()) {
666 tty->print_cr("bci_from(%p) = %d; print_codes():",
667 mh, mh->bci_from(address(bcp)));
668 mh->print_codes_on(tty);
669 }
670 }
671
672 // int versions of all methods to avoid having to type type casts in the debugger
673
674 void pp(intptr_t p) { pp((void*)p); }
675 void pp(oop p) { pp((void*)p); }
676
677 void help() {
678 Command c("help");
679 tty->print_cr("basic");
680 tty->print_cr(" pp(void* p) - try to make sense of p");
681 tty->print_cr(" pv(intptr_t p)- ((PrintableResourceObj*) p)->print()");
682 tty->print_cr(" ps() - print current thread stack");
683 tty->print_cr(" pss() - print all thread stacks");
684 tty->print_cr(" pm(int pc) - print Method* given compiled PC");
685 tty->print_cr(" findm(intptr_t pc) - finds Method*");
686 tty->print_cr(" find(intptr_t x) - finds & prints nmethod/stub/bytecode/oop based on pointer into it");
687 tty->print_cr(" pns(void* sp, void* fp, void* pc) - print native (i.e. mixed) stack trace. E.g.");
688 tty->print_cr(" pns($sp, $rbp, $pc) on Linux/amd64 and Solaris/amd64 or");
689 tty->print_cr(" pns($sp, $ebp, $pc) on Linux/x86 or");
690 tty->print_cr(" pns($sp, 0, $pc) on Linux/ppc64 or");
691 tty->print_cr(" pns($sp + 0x7ff, 0, $pc) on Solaris/SPARC");
692 tty->print_cr(" - in gdb do 'set overload-resolution off' before calling pns()");
693 tty->print_cr(" - in dbx do 'frame 1' before calling pns()");
694
695 tty->print_cr("misc.");
696 tty->print_cr(" flush() - flushes the log file");
697 tty->print_cr(" events() - dump events from ring buffers");
698
699
700 tty->print_cr("compiler debugging");
701 tty->print_cr(" debug() - to set things up for compiler debugging");
702 tty->print_cr(" ndebug() - undo debug");
703 }
704
705 #endif // !PRODUCT
706
707 void print_native_stack(outputStream* st, frame fr, Thread* t, char* buf, int buf_size) {
708
709 // see if it's a valid frame
710 if (fr.pc()) {
711 st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
712
713 int count = 0;
714 while (count++ < StackPrintLimit) {
715 fr.print_on_error(st, buf, buf_size);
716 st->cr();
717 // Compiled code may use EBP register on x86 so it looks like
718 // non-walkable C frame. Use frame.sender() for java frames.
719 if (t && t->is_Java_thread()) {
720 // Catch very first native frame by using stack address.
721 // For JavaThread stack_base and stack_size should be set.
722 if (!t->on_local_stack((address)(fr.real_fp() + 1))) {
723 break;
724 }
725 if (fr.is_java_frame() || fr.is_native_frame() || fr.is_runtime_frame()) {
726 RegisterMap map((JavaThread*)t, false); // No update
727 fr = fr.sender(&map);
728 } else {
729 fr = os::get_sender_for_C_frame(&fr);
730 }
731 } else {
732 // is_first_C_frame() does only simple checks for frame pointer,
733 // it will pass if java compiled code has a pointer in EBP.
734 if (os::is_first_C_frame(&fr)) break;
735 fr = os::get_sender_for_C_frame(&fr);
736 }
737 }
738
739 if (count > StackPrintLimit) {
740 st->print_cr("...<more frames>...");
741 }
742
743 st->cr();
744 }
745 }
746
747 #ifndef PRODUCT
748
749 extern "C" void pns(void* sp, void* fp, void* pc) { // print native stack
750 Command c("pns");
751 static char buf[O_BUFLEN];
752 Thread* t = ThreadLocalStorage::get_thread_slow();
753 // Call generic frame constructor (certain arguments may be ignored)
754 frame fr(sp, fp, pc);
755 print_native_stack(tty, fr, t, buf, sizeof(buf));
756 }
757
758 #endif // !PRODUCT