1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "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/vframe.hpp"
48 #include "services/heapDumper.hpp"
49 #include "utilities/defaultStream.hpp"
50 #include "utilities/events.hpp"
51 #include "utilities/top.hpp"
52 #include "utilities/vmError.hpp"
53 #ifdef TARGET_OS_FAMILY_linux
54 # include "os_linux.inline.hpp"
55 # include "thread_linux.inline.hpp"
56 #endif
57 #ifdef TARGET_OS_FAMILY_solaris
58 # include "os_solaris.inline.hpp"
59 # include "thread_solaris.inline.hpp"
60 #endif
61 #ifdef TARGET_OS_FAMILY_windows
62 # include "os_windows.inline.hpp"
63 # include "thread_windows.inline.hpp"
64 #endif
65 #ifdef TARGET_OS_FAMILY_bsd
66 # include "os_bsd.inline.hpp"
67 # include "thread_bsd.inline.hpp"
68 #endif
69
70 #ifndef ASSERT
71 # ifdef _DEBUG
72 // NOTE: don't turn the lines below into a comment -- if you're getting
73 // a compile error here, change the settings to define ASSERT
74 ASSERT should be defined when _DEBUG is defined. It is not intended to be used for debugging
75 functions that do not slow down the system too much and thus can be left in optimized code.
76 On the other hand, the code should not be included in a production version.
77 # endif // _DEBUG
78 #endif // ASSERT
79
80
81 #ifdef _DEBUG
82 # ifndef ASSERT
83 configuration error: ASSERT must be defined in debug version
84 # endif // ASSERT
85 #endif // _DEBUG
86
87
88 #ifdef PRODUCT
89 # if -defined _DEBUG || -defined ASSERT
90 configuration error: ASSERT et al. must not be defined in PRODUCT version
91 # endif
92 #endif // PRODUCT
93
94
95 void warning(const char* format, ...) {
96 if (PrintWarnings) {
97 // In case error happens before init or during shutdown
98 if (tty == NULL) ostream_init();
99
100 tty->print("%s warning: ", VM_Version::vm_name());
101 va_list ap;
102 va_start(ap, format);
103 tty->vprint_cr(format, ap);
104 va_end(ap);
105 }
106 if (BreakAtWarning) BREAKPOINT;
107 }
108
109 #ifndef PRODUCT
110
111 #define is_token_break(ch) (isspace(ch) || (ch) == ',')
112
113 static const char* last_file_name = NULL;
114 static int last_line_no = -1;
115
116 // assert/guarantee/... may happen very early during VM initialization.
117 // Don't rely on anything that is initialized by Threads::create_vm(). For
118 // example, don't use tty.
119 bool error_is_suppressed(const char* file_name, int line_no) {
120 // The following 1-element cache requires that passed-in
121 // file names are always only constant literals.
122 if (file_name == last_file_name && line_no == last_line_no) return true;
123
124 int file_name_len = (int)strlen(file_name);
125 char separator = os::file_separator()[0];
126 const char* base_name = strrchr(file_name, separator);
127 if (base_name == NULL)
128 base_name = file_name;
129
130 // scan the SuppressErrorAt option
131 const char* cp = SuppressErrorAt;
132 for (;;) {
133 const char* sfile;
134 int sfile_len;
135 int sline;
136 bool noisy;
137 while ((*cp) != '\0' && is_token_break(*cp)) cp++;
138 if ((*cp) == '\0') break;
139 sfile = cp;
140 while ((*cp) != '\0' && !is_token_break(*cp) && (*cp) != ':') cp++;
141 sfile_len = cp - sfile;
142 if ((*cp) == ':') cp++;
143 sline = 0;
144 while ((*cp) != '\0' && isdigit(*cp)) {
145 sline *= 10;
146 sline += (*cp) - '0';
147 cp++;
148 }
149 // "file:line!" means the assert suppression is not silent
150 noisy = ((*cp) == '!');
151 while ((*cp) != '\0' && !is_token_break(*cp)) cp++;
152 // match the line
153 if (sline != 0) {
154 if (sline != line_no) continue;
155 }
156 // match the file
157 if (sfile_len > 0) {
158 const char* look = file_name;
159 const char* look_max = file_name + file_name_len - sfile_len;
160 const char* foundp;
161 bool match = false;
162 while (!match
163 && (foundp = strchr(look, sfile[0])) != NULL
164 && foundp <= look_max) {
165 match = true;
166 for (int i = 1; i < sfile_len; i++) {
167 if (sfile[i] != foundp[i]) {
168 match = false;
169 break;
170 }
171 }
172 look = foundp + 1;
173 }
174 if (!match) continue;
175 }
176 // got a match!
177 if (noisy) {
178 fdStream out(defaultStream::output_fd());
179 out.print_raw("[error suppressed at ");
180 out.print_raw(base_name);
181 char buf[16];
182 jio_snprintf(buf, sizeof(buf), ":%d]", line_no);
183 out.print_raw_cr(buf);
184 } else {
185 // update 1-element cache for fast silent matches
186 last_file_name = file_name;
187 last_line_no = line_no;
188 }
189 return true;
190 }
191
192 if (!is_error_reported()) {
193 // print a friendly hint:
194 fdStream out(defaultStream::output_fd());
195 out.print_raw_cr("# To suppress the following error report, specify this argument");
196 out.print_raw ("# after -XX: or in .hotspotrc: SuppressErrorAt=");
197 out.print_raw (base_name);
198 char buf[16];
199 jio_snprintf(buf, sizeof(buf), ":%d", line_no);
200 out.print_raw_cr(buf);
201 }
202 return false;
203 }
204
205 #undef is_token_break
206
207 #else
208
209 // Place-holder for non-existent suppression check:
210 #define error_is_suppressed(file_name, line_no) (false)
211
212 #endif //PRODUCT
213
214 void report_vm_error(const char* file, int line, const char* error_msg,
215 const char* detail_msg)
216 {
217 if (Debugging || error_is_suppressed(file, line)) return;
218 Thread* const thread = ThreadLocalStorage::get_thread_slow();
219 VMError err(thread, file, line, error_msg, detail_msg);
220 err.report_and_die();
221 }
222
223 void report_fatal(const char* file, int line, const char* message)
224 {
225 report_vm_error(file, line, "fatal error", message);
226 }
227
228 // Used by report_vm_out_of_memory to detect recursion.
229 static jint _exiting_out_of_mem = 0;
230
231 void report_vm_out_of_memory(const char* file, int line, size_t size,
232 const char* message) {
233 if (Debugging) return;
234
235 // We try to gather additional information for the first out of memory
236 // error only; gathering additional data might cause an allocation and a
237 // recursive out_of_memory condition.
238
239 const jint exiting = 1;
240 // If we succeed in changing the value, we're the first one in.
241 bool first_time_here = Atomic::xchg(exiting, &_exiting_out_of_mem) != exiting;
242
243 if (first_time_here) {
244 Thread* thread = ThreadLocalStorage::get_thread_slow();
245 VMError(thread, file, line, size, message).report_and_die();
246 }
247
248 // Dump core and abort
249 vm_abort(true);
250 }
251
252 void report_should_not_call(const char* file, int line) {
253 report_vm_error(file, line, "ShouldNotCall()");
254 }
255
256 void report_should_not_reach_here(const char* file, int line) {
257 report_vm_error(file, line, "ShouldNotReachHere()");
258 }
259
260 void report_unimplemented(const char* file, int line) {
261 report_vm_error(file, line, "Unimplemented()");
262 }
263
264 void report_untested(const char* file, int line, const char* message) {
265 #ifndef PRODUCT
266 warning("Untested: %s in %s: %d\n", message, file, line);
267 #endif // PRODUCT
268 }
269
270 void report_out_of_shared_space(SharedSpaceType shared_space) {
271 static const char* name[] = {
272 "permanent generation",
273 "shared read only space",
274 "shared read write space",
275 "shared miscellaneous data space"
276 };
277 static const char* flag[] = {
278 "PermGen",
279 "SharedReadOnlySize",
280 "SharedReadWriteSize",
281 "SharedMiscDataSize"
282 };
283
284 warning("\nThe %s is not large enough\n"
285 "to preload requested classes. Use -XX:%s=\n"
286 "to increase the initial size of %s.\n",
287 name[shared_space], flag[shared_space], name[shared_space]);
288 exit(2);
289 }
290
291 void report_java_out_of_memory(const char* message) {
292 static jint out_of_memory_reported = 0;
293
294 // A number of threads may attempt to report OutOfMemoryError at around the
295 // same time. To avoid dumping the heap or executing the data collection
296 // commands multiple times we just do it once when the first threads reports
297 // the error.
298 if (Atomic::cmpxchg(1, &out_of_memory_reported, 0) == 0) {
299 // create heap dump before OnOutOfMemoryError commands are executed
300 if (HeapDumpOnOutOfMemoryError) {
301 tty->print_cr("java.lang.OutOfMemoryError: %s", message);
302 HeapDumper::dump_heap_from_oome();
303 }
304
305 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
306 VMError err(message);
307 err.report_java_out_of_memory();
308 }
309 }
310 }
311
312
313 extern "C" void ps();
314
315 static bool error_reported = false;
316
317 // call this when the VM is dying--it might loosen some asserts
318 void set_error_reported() {
319 error_reported = true;
320 }
321
322 bool is_error_reported() {
323 return error_reported;
324 }
325
326 #ifndef PRODUCT
327 #include <signal.h>
328
329 void test_error_handler(size_t test_num)
330 {
331 if (test_num == 0) return;
332
333 // If asserts are disabled, use the corresponding guarantee instead.
334 size_t n = test_num;
335 NOT_DEBUG(if (n <= 2) n += 2);
336
337 const char* const str = "hello";
338 const size_t num = (size_t)os::vm_page_size();
339
340 const char* const eol = os::line_separator();
341 const char* const msg = "this message should be truncated during formatting";
342
343 // Keep this in sync with test/runtime/6888954/vmerrors.sh.
344 switch (n) {
345 case 1: assert(str == NULL, "expected null");
346 case 2: assert(num == 1023 && *str == 'X',
347 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
348 case 3: guarantee(str == NULL, "expected null");
349 case 4: guarantee(num == 1023 && *str == 'X',
350 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
351 case 5: fatal("expected null");
352 case 6: fatal(err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str));
353 case 7: fatal(err_msg("%s%s# %s%s# %s%s# %s%s# %s%s# "
354 "%s%s# %s%s# %s%s# %s%s# %s%s# "
355 "%s%s# %s%s# %s%s# %s%s# %s",
356 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
357 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
358 msg, eol, msg, eol, msg, eol, msg, eol, msg));
359 case 8: vm_exit_out_of_memory(num, "ChunkPool::allocate");
360 case 9: ShouldNotCallThis();
361 case 10: ShouldNotReachHere();
362 case 11: Unimplemented();
363 // This is last because it does not generate an hs_err* file on Windows.
364 case 12: os::signal_raise(SIGSEGV);
365
366 default: ShouldNotReachHere();
367 }
368 }
369 #endif // #ifndef PRODUCT
370
371 // ------ helper functions for debugging go here ------------
372
373 #ifndef PRODUCT
374 // All debug entries should be wrapped with a stack allocated
375 // Command object. It makes sure a resource mark is set and
376 // flushes the logfile to prevent file sharing problems.
377
378 class Command : public StackObj {
379 private:
380 ResourceMark rm;
381 ResetNoHandleMark rnhm;
382 HandleMark hm;
383 bool debug_save;
384 public:
385 static int level;
386 Command(const char* str) {
387 debug_save = Debugging;
388 Debugging = true;
389 if (level++ > 0) return;
390 tty->cr();
391 tty->print_cr("\"Executing %s\"", str);
392 }
393
394 ~Command() { tty->flush(); Debugging = debug_save; level--; }
395 };
396
397 int Command::level = 0;
398
399 extern "C" void blob(CodeBlob* cb) {
400 Command c("blob");
401 cb->print();
402 }
403
404
405 extern "C" void dump_vtable(address p) {
406 Command c("dump_vtable");
407 klassOop k = (klassOop)p;
408 instanceKlass::cast(k)->vtable()->print();
409 }
410
411
412 extern "C" void nm(intptr_t p) {
413 // Actually we look through all CodeBlobs (the nm name has been kept for backwards compatability)
414 Command c("nm");
415 CodeBlob* cb = CodeCache::find_blob((address)p);
416 if (cb == NULL) {
417 tty->print_cr("NULL");
418 } else {
419 cb->print();
420 }
421 }
422
423
424 extern "C" void disnm(intptr_t p) {
425 Command c("disnm");
426 CodeBlob* cb = CodeCache::find_blob((address) p);
427 nmethod* nm = cb->as_nmethod_or_null();
428 if (nm) {
429 nm->print();
430 Disassembler::decode(nm);
431 } else {
432 cb->print();
433 Disassembler::decode(cb);
434 }
435 }
436
437
438 extern "C" void printnm(intptr_t p) {
439 char buffer[256];
440 sprintf(buffer, "printnm: " INTPTR_FORMAT, p);
441 Command c(buffer);
442 CodeBlob* cb = CodeCache::find_blob((address) p);
443 if (cb->is_nmethod()) {
444 nmethod* nm = (nmethod*)cb;
445 nm->print_nmethod(true);
446 }
447 }
448
449
450 extern "C" void universe() {
451 Command c("universe");
452 Universe::print();
453 }
454
455
456 extern "C" void verify() {
457 // try to run a verify on the entire system
458 // note: this may not be safe if we're not at a safepoint; for debugging,
459 // this manipulates the safepoint settings to avoid assertion failures
460 Command c("universe verify");
461 bool safe = SafepointSynchronize::is_at_safepoint();
462 if (!safe) {
463 tty->print_cr("warning: not at safepoint -- verify may fail");
464 SafepointSynchronize::set_is_at_safepoint();
465 }
466 // Ensure Eden top is correct before verification
467 Universe::heap()->prepare_for_verify();
468 Universe::verify(true);
469 if (!safe) SafepointSynchronize::set_is_not_at_safepoint();
470 }
471
472
473 extern "C" void pp(void* p) {
474 Command c("pp");
475 FlagSetting fl(PrintVMMessages, true);
476 FlagSetting f2(DisplayVMOutput, true);
477 if (Universe::heap()->is_in(p)) {
478 oop obj = oop(p);
479 obj->print();
480 } else {
481 tty->print("%#p", p);
482 }
483 }
484
485
486 // pv: print vm-printable object
487 extern "C" void pa(intptr_t p) { ((AllocatedObj*) p)->print(); }
488 extern "C" void findpc(intptr_t x);
489
490 extern "C" void ps() { // print stack
491 Command c("ps");
492
493
494 // Prints the stack of the current Java thread
495 JavaThread* p = JavaThread::active();
496 tty->print(" for thread: ");
497 p->print();
498 tty->cr();
499
500 if (p->has_last_Java_frame()) {
501 // If the last_Java_fp is set we are in C land and
502 // can call the standard stack_trace function.
503 p->trace_stack();
504 } else {
505 frame f = os::current_frame();
506 RegisterMap reg_map(p);
507 f = f.sender(®_map);
508 tty->print("(guessing starting frame id=%#p based on current fp)\n", f.id());
509 p->trace_stack_from(vframe::new_vframe(&f, ®_map, p));
510 pd_ps(f);
511 }
512
513 }
514
515 extern "C" void pfl() {
516 // print frame layout
517 Command c("pfl");
518 JavaThread* p = JavaThread::active();
519 tty->print(" for thread: ");
520 p->print();
521 tty->cr();
522 if (p->has_last_Java_frame()) {
523 p->print_frame_layout();
524 }
525 }
526
527 extern "C" void psf() { // print stack frames
528 {
529 Command c("psf");
530 JavaThread* p = JavaThread::active();
531 tty->print(" for thread: ");
532 p->print();
533 tty->cr();
534 if (p->has_last_Java_frame()) {
535 p->trace_frames();
536 }
537 }
538 }
539
540
541 extern "C" void threads() {
542 Command c("threads");
543 Threads::print(false, true);
544 }
545
546
547 extern "C" void psd() {
548 Command c("psd");
549 SystemDictionary::print();
550 }
551
552
553 extern "C" void safepoints() {
554 Command c("safepoints");
555 SafepointSynchronize::print_state();
556 }
557
558
559 extern "C" void pss() { // print all stacks
560 Command c("pss");
561 Threads::print(true, true);
562 }
563
564
565 extern "C" void debug() { // to set things up for compiler debugging
566 Command c("debug");
567 WizardMode = true;
568 PrintVMMessages = PrintCompilation = true;
569 PrintInlining = PrintAssembly = true;
570 tty->flush();
571 }
572
573
574 extern "C" void ndebug() { // undo debug()
575 Command c("ndebug");
576 PrintCompilation = false;
577 PrintInlining = PrintAssembly = false;
578 tty->flush();
579 }
580
581
582 extern "C" void flush() {
583 Command c("flush");
584 tty->flush();
585 }
586
587
588 extern "C" void events() {
589 Command c("events");
590 Events::print_last(tty, 50);
591 }
592
593
594 extern "C" void nevents(int n) {
595 Command c("events");
596 Events::print_last(tty, n);
597 }
598
599
600 // Given a heap address that was valid before the most recent GC, if
601 // the oop that used to contain it is still live, prints the new
602 // location of the oop and the address. Useful for tracking down
603 // certain kinds of naked oop and oop map bugs.
604 extern "C" void pnl(intptr_t old_heap_addr) {
605 // Print New Location of old heap address
606 Command c("pnl");
607 #ifndef VALIDATE_MARK_SWEEP
608 tty->print_cr("Requires build with VALIDATE_MARK_SWEEP defined (debug build) and RecordMarkSweepCompaction enabled");
609 #else
610 MarkSweep::print_new_location_of_heap_address((HeapWord*) old_heap_addr);
611 #endif
612 }
613
614
615 extern "C" methodOop findm(intptr_t pc) {
616 Command c("findm");
617 nmethod* nm = CodeCache::find_nmethod((address)pc);
618 return (nm == NULL) ? (methodOop)NULL : nm->method();
619 }
620
621
622 extern "C" nmethod* findnm(intptr_t addr) {
623 Command c("findnm");
624 return CodeCache::find_nmethod((address)addr);
625 }
626
627 static address same_page(address x, address y) {
628 intptr_t page_bits = -os::vm_page_size();
629 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) {
630 return x;
631 } else if (x > y) {
632 return (address)(intptr_t(y) | ~page_bits) + 1;
633 } else {
634 return (address)(intptr_t(y) & page_bits);
635 }
636 }
637
638 class LookForRefInGenClosure : public OopsInGenClosure {
639 public:
640 oop target;
641 void do_oop(oop* o) {
642 if (o != NULL && *o == target) {
643 tty->print_cr(INTPTR_FORMAT, o);
644 }
645 }
646 void do_oop(narrowOop* o) { ShouldNotReachHere(); }
647 };
648
649
650 class LookForRefInObjectClosure : public ObjectClosure {
651 private:
652 LookForRefInGenClosure look_in_object;
653 public:
654 LookForRefInObjectClosure(oop target) { look_in_object.target = target; }
655 void do_object(oop obj) {
656 obj->oop_iterate(&look_in_object);
657 }
658 };
659
660
661 static void findref(intptr_t x) {
662 CollectedHeap *ch = Universe::heap();
663 LookForRefInGenClosure lookFor;
664 lookFor.target = (oop) x;
665 LookForRefInObjectClosure look_in_object((oop) x);
666
667 tty->print_cr("Searching heap:");
668 ch->object_iterate(&look_in_object);
669
670 tty->print_cr("Searching strong roots:");
671 Universe::oops_do(&lookFor, false);
672 JNIHandles::oops_do(&lookFor); // Global (strong) JNI handles
673 Threads::oops_do(&lookFor, NULL);
674 ObjectSynchronizer::oops_do(&lookFor);
675 //FlatProfiler::oops_do(&lookFor);
676 SystemDictionary::oops_do(&lookFor);
677
678 tty->print_cr("Searching code cache:");
679 CodeCache::oops_do(&lookFor);
680
681 tty->print_cr("Done.");
682 }
683
684 class FindClassObjectClosure: public ObjectClosure {
685 private:
686 const char* _target;
687 public:
688 FindClassObjectClosure(const char name[]) { _target = name; }
689
690 virtual void do_object(oop obj) {
691 if (obj->is_klass()) {
692 Klass* k = klassOop(obj)->klass_part();
693 if (k->name() != NULL) {
694 ResourceMark rm;
695 const char* ext = k->external_name();
696 if ( strcmp(_target, ext) == 0 ) {
697 tty->print_cr("Found " INTPTR_FORMAT, obj);
698 obj->print();
699 }
700 }
701 }
702 }
703 };
704
705 //
706 extern "C" void findclass(const char name[]) {
707 Command c("findclass");
708 if (name != NULL) {
709 tty->print_cr("Finding class %s -> ", name);
710 FindClassObjectClosure srch(name);
711 Universe::heap()->permanent_object_iterate(&srch);
712 }
713 }
714
715 // Another interface that isn't ambiguous in dbx.
716 // Can we someday rename the other find to hsfind?
717 extern "C" void hsfind(intptr_t x) {
718 Command c("hsfind");
719 os::print_location(tty, x, false);
720 }
721
722
723 extern "C" void hsfindref(intptr_t x) {
724 Command c("hsfindref");
725 findref(x);
726 }
727
728 extern "C" void find(intptr_t x) {
729 Command c("find");
730 os::print_location(tty, x, false);
731 }
732
733
734 extern "C" void findpc(intptr_t x) {
735 Command c("findpc");
736 os::print_location(tty, x, true);
737 }
738
739
740 // int versions of all methods to avoid having to type type casts in the debugger
741
742 void pp(intptr_t p) { pp((void*)p); }
743 void pp(oop p) { pp((void*)p); }
744
745 void help() {
746 Command c("help");
747 tty->print_cr("basic");
748 tty->print_cr(" pp(void* p) - try to make sense of p");
749 tty->print_cr(" pv(intptr_t p)- ((PrintableResourceObj*) p)->print()");
750 tty->print_cr(" ps() - print current thread stack");
751 tty->print_cr(" pss() - print all thread stacks");
752 tty->print_cr(" pm(int pc) - print methodOop given compiled PC");
753 tty->print_cr(" findm(intptr_t pc) - finds methodOop");
754 tty->print_cr(" find(intptr_t x) - finds & prints nmethod/stub/bytecode/oop based on pointer into it");
755
756 tty->print_cr("misc.");
757 tty->print_cr(" flush() - flushes the log file");
758 tty->print_cr(" events() - dump last 50 events");
759
760
761 tty->print_cr("compiler debugging");
762 tty->print_cr(" debug() - to set things up for compiler debugging");
763 tty->print_cr(" ndebug() - undo debug");
764 }
765
766 #if 0
767
768 // BobV's command parser for debugging on windows when nothing else works.
769
770 enum CommandID {
771 CMDID_HELP,
772 CMDID_QUIT,
773 CMDID_HSFIND,
774 CMDID_PSS,
775 CMDID_PS,
776 CMDID_PSF,
777 CMDID_FINDM,
778 CMDID_FINDNM,
779 CMDID_PP,
780 CMDID_BPT,
781 CMDID_EXIT,
782 CMDID_VERIFY,
783 CMDID_THREADS,
784 CMDID_ILLEGAL = 99
785 };
786
787 struct CommandParser {
788 char *name;
789 CommandID code;
790 char *description;
791 };
792
793 struct CommandParser CommandList[] = {
794 (char *)"help", CMDID_HELP, " Dump this list",
795 (char *)"quit", CMDID_QUIT, " Return from this routine",
796 (char *)"hsfind", CMDID_HSFIND, "Perform an hsfind on an address",
797 (char *)"ps", CMDID_PS, " Print Current Thread Stack Trace",
798 (char *)"pss", CMDID_PSS, " Print All Thread Stack Trace",
799 (char *)"psf", CMDID_PSF, " Print All Stack Frames",
800 (char *)"findm", CMDID_FINDM, " Find a methodOop from a PC",
801 (char *)"findnm", CMDID_FINDNM, "Find an nmethod from a PC",
802 (char *)"pp", CMDID_PP, " Find out something about a pointer",
803 (char *)"break", CMDID_BPT, " Execute a breakpoint",
804 (char *)"exitvm", CMDID_EXIT, "Exit the VM",
805 (char *)"verify", CMDID_VERIFY, "Perform a Heap Verify",
806 (char *)"thread", CMDID_THREADS, "Dump Info on all Threads",
807 (char *)0, CMDID_ILLEGAL
808 };
809
810
811 // get_debug_command()
812 //
813 // Read a command from standard input.
814 // This is useful when you have a debugger
815 // which doesn't support calling into functions.
816 //
817 void get_debug_command()
818 {
819 ssize_t count;
820 int i,j;
821 bool gotcommand;
822 intptr_t addr;
823 char buffer[256];
824 nmethod *nm;
825 methodOop m;
826
827 tty->print_cr("You have entered the diagnostic command interpreter");
828 tty->print("The supported commands are:\n");
829 for ( i=0; ; i++ ) {
830 if ( CommandList[i].code == CMDID_ILLEGAL )
831 break;
832 tty->print_cr(" %s \n", CommandList[i].name );
833 }
834
835 while ( 1 ) {
836 gotcommand = false;
837 tty->print("Please enter a command: ");
838 count = scanf("%s", buffer) ;
839 if ( count >=0 ) {
840 for ( i=0; ; i++ ) {
841 if ( CommandList[i].code == CMDID_ILLEGAL ) {
842 if (!gotcommand) tty->print("Invalid command, please try again\n");
843 break;
844 }
845 if ( strcmp(buffer, CommandList[i].name) == 0 ) {
846 gotcommand = true;
847 switch ( CommandList[i].code ) {
848 case CMDID_PS:
849 ps();
850 break;
851 case CMDID_PSS:
852 pss();
853 break;
854 case CMDID_PSF:
855 psf();
856 break;
857 case CMDID_FINDM:
858 tty->print("Please enter the hex addr to pass to findm: ");
859 scanf("%I64X", &addr);
860 m = (methodOop)findm(addr);
861 tty->print("findm(0x%I64X) returned 0x%I64X\n", addr, m);
862 break;
863 case CMDID_FINDNM:
864 tty->print("Please enter the hex addr to pass to findnm: ");
865 scanf("%I64X", &addr);
866 nm = (nmethod*)findnm(addr);
867 tty->print("findnm(0x%I64X) returned 0x%I64X\n", addr, nm);
868 break;
869 case CMDID_PP:
870 tty->print("Please enter the hex addr to pass to pp: ");
871 scanf("%I64X", &addr);
872 pp((void*)addr);
873 break;
874 case CMDID_EXIT:
875 exit(0);
876 case CMDID_HELP:
877 tty->print("Here are the supported commands: ");
878 for ( j=0; ; j++ ) {
879 if ( CommandList[j].code == CMDID_ILLEGAL )
880 break;
881 tty->print_cr(" %s -- %s\n", CommandList[j].name,
882 CommandList[j].description );
883 }
884 break;
885 case CMDID_QUIT:
886 return;
887 break;
888 case CMDID_BPT:
889 BREAKPOINT;
890 break;
891 case CMDID_VERIFY:
892 verify();;
893 break;
894 case CMDID_THREADS:
895 threads();;
896 break;
897 case CMDID_HSFIND:
898 tty->print("Please enter the hex addr to pass to hsfind: ");
899 scanf("%I64X", &addr);
900 tty->print("Calling hsfind(0x%I64X)\n", addr);
901 hsfind(addr);
902 break;
903 default:
904 case CMDID_ILLEGAL:
905 break;
906 }
907 }
908 }
909 }
910 }
911 }
912 #endif
913
914 #endif // PRODUCT