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 "memory/allocation.inline.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #include "runtime/globals.hpp"
30 #include "runtime/globals_extension.hpp"
31 #include "runtime/commandLineFlagConstraintList.hpp"
32 #include "runtime/commandLineFlagWriteableList.hpp"
33 #include "runtime/commandLineFlagRangeList.hpp"
34 #include "runtime/os.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "trace/tracing.hpp"
37 #include "utilities/defaultStream.hpp"
38 #include "utilities/macros.hpp"
39 #include "utilities/ostream.hpp"
40 #if INCLUDE_ALL_GCS
41 #include "gc/g1/g1_globals.hpp"
42 #endif // INCLUDE_ALL_GCS
43 #ifdef COMPILER1
44 #include "c1/c1_globals.hpp"
45 #endif
46 #if INCLUDE_JVMCI
47 #include "jvmci/jvmci_globals.hpp"
48 #endif
49 #ifdef COMPILER2
50 #include "opto/c2_globals.hpp"
51 #endif
52 #ifdef SHARK
53 #include "shark/shark_globals.hpp"
54 #endif
55
56 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \
57 MATERIALIZE_PD_DEVELOPER_FLAG, \
58 MATERIALIZE_PRODUCT_FLAG, \
59 MATERIALIZE_PD_PRODUCT_FLAG, \
60 MATERIALIZE_DIAGNOSTIC_FLAG, \
61 MATERIALIZE_PD_DIAGNOSTIC_FLAG, \
62 MATERIALIZE_EXPERIMENTAL_FLAG, \
63 MATERIALIZE_NOTPRODUCT_FLAG, \
64 MATERIALIZE_MANAGEABLE_FLAG, \
65 MATERIALIZE_PRODUCT_RW_FLAG, \
66 MATERIALIZE_LP64_PRODUCT_FLAG, \
67 IGNORE_RANGE, \
68 IGNORE_CONSTRAINT, \
69 IGNORE_WRITEABLE)
70
71 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \
72 MATERIALIZE_PD_DEVELOPER_FLAG, \
73 MATERIALIZE_PRODUCT_FLAG, \
74 MATERIALIZE_PD_PRODUCT_FLAG, \
75 MATERIALIZE_DIAGNOSTIC_FLAG, \
76 MATERIALIZE_PD_DIAGNOSTIC_FLAG, \
77 MATERIALIZE_NOTPRODUCT_FLAG, \
78 IGNORE_RANGE, \
79 IGNORE_CONSTRAINT, \
80 IGNORE_WRITEABLE)
81
82 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \
83 MATERIALIZE_PRODUCT_FLAG, \
84 MATERIALIZE_DIAGNOSTIC_FLAG, \
85 MATERIALIZE_EXPERIMENTAL_FLAG, \
86 MATERIALIZE_NOTPRODUCT_FLAG, \
87 IGNORE_RANGE, \
88 IGNORE_CONSTRAINT, \
89 IGNORE_WRITEABLE)
90
91 MATERIALIZE_FLAGS_EXT
92
93 #define DEFAULT_RANGE_STR_CHUNK_SIZE 64
94 static char* create_range_str(const char *fmt, ...) {
95 static size_t string_length = DEFAULT_RANGE_STR_CHUNK_SIZE;
96 static char* range_string = NEW_C_HEAP_ARRAY(char, string_length, mtLogging);
97
98 int size_needed = 0;
99 do {
100 va_list args;
101 va_start(args, fmt);
102 size_needed = jio_vsnprintf(range_string, string_length, fmt, args);
103 va_end(args);
104
105 if (size_needed < 0) {
106 string_length += DEFAULT_RANGE_STR_CHUNK_SIZE;
107 range_string = REALLOC_C_HEAP_ARRAY(char, range_string, string_length, mtLogging);
108 guarantee(range_string != NULL, "create_range_str string should not be NULL");
109 }
110 } while (size_needed < 0);
111
112 return range_string;
113 }
114
115 const char* Flag::get_int_default_range_str() {
116 return create_range_str("[ " INT32_FORMAT_W(-25) " ... " INT32_FORMAT_W(25) " ]", INT_MIN, INT_MAX);
117 }
118
119 const char* Flag::get_uint_default_range_str() {
120 return create_range_str("[ " UINT32_FORMAT_W(-25) " ... " UINT32_FORMAT_W(25) " ]", 0, UINT_MAX);
121 }
122
123 const char* Flag::get_intx_default_range_str() {
124 return create_range_str("[ " INTX_FORMAT_W(-25) " ... " INTX_FORMAT_W(25) " ]", min_intx, max_intx);
125 }
126
127 const char* Flag::get_uintx_default_range_str() {
128 return create_range_str("[ " UINTX_FORMAT_W(-25) " ... " UINTX_FORMAT_W(25) " ]", 0, max_uintx);
129 }
130
131 const char* Flag::get_uint64_t_default_range_str() {
132 return create_range_str("[ " UINT64_FORMAT_W(-25) " ... " UINT64_FORMAT_W(25) " ]", 0, uint64_t(max_juint));
133 }
134
135 const char* Flag::get_size_t_default_range_str() {
136 return create_range_str("[ " SIZE_FORMAT_W(-25) " ... " SIZE_FORMAT_W(25) " ]", 0, SIZE_MAX);
137 }
138
139 const char* Flag::get_double_default_range_str() {
140 return create_range_str("[ %-25.3f ... %25.3f ]", DBL_MIN, DBL_MAX);
141 }
142
143 static bool is_product_build() {
144 #ifdef PRODUCT
145 return true;
146 #else
147 return false;
148 #endif
149 }
150
151 Flag::Error Flag::check_writable(bool changed) {
152 if (is_constant_in_binary()) {
153 fatal("flag is constant: %s", _name);
154 }
155
156 Flag::Error error = Flag::SUCCESS;
157 if (changed) {
158 CommandLineFlagWriteable* writeable = CommandLineFlagWriteableList::find(_name);
159 if (writeable) {
160 if (writeable->is_writeable() == false) {
161 switch (writeable->type())
162 {
163 case CommandLineFlagWriteable::Once:
164 error = Flag::SET_ONLY_ONCE;
165 jio_fprintf(defaultStream::error_stream(), "Error: %s may not be set more than once\n", _name);
166 break;
167 case CommandLineFlagWriteable::CommandLineOnly:
168 error = Flag::COMMAND_LINE_ONLY;
169 jio_fprintf(defaultStream::error_stream(), "Error: %s may be modified only from commad line\n", _name);
170 break;
171 default:
172 ShouldNotReachHere();
173 break;
174 }
175 }
176 writeable->mark_once();
177 }
178 }
179 return error;
180 }
181
182 bool Flag::is_bool() const {
183 return strcmp(_type, "bool") == 0;
184 }
185
186 bool Flag::get_bool() const {
187 return *((bool*) _addr);
188 }
189
190 Flag::Error Flag::set_bool(bool value) {
191 Flag::Error error = check_writable(value!=get_bool());
192 if (error == Flag::SUCCESS) {
193 *((bool*) _addr) = value;
194 }
195 return error;
196 }
197
198 bool Flag::is_int() const {
199 return strcmp(_type, "int") == 0;
200 }
201
202 int Flag::get_int() const {
203 return *((int*) _addr);
204 }
205
206 Flag::Error Flag::set_int(int value) {
207 Flag::Error error = check_writable(value!=get_int());
208 if (error == Flag::SUCCESS) {
209 *((int*) _addr) = value;
210 }
211 return error;
212 }
213
214 bool Flag::is_uint() const {
215 return strcmp(_type, "uint") == 0;
216 }
217
218 uint Flag::get_uint() const {
219 return *((uint*) _addr);
220 }
221
222 Flag::Error Flag::set_uint(uint value) {
223 Flag::Error error = check_writable(value!=get_uint());
224 if (error == Flag::SUCCESS) {
225 *((uint*) _addr) = value;
226 }
227 return error;
228 }
229
230 bool Flag::is_intx() const {
231 return strcmp(_type, "intx") == 0;
232 }
233
234 intx Flag::get_intx() const {
235 return *((intx*) _addr);
236 }
237
238 Flag::Error Flag::set_intx(intx value) {
239 Flag::Error error = check_writable(value!=get_intx());
240 if (error == Flag::SUCCESS) {
241 *((intx*) _addr) = value;
242 }
243 return error;
244 }
245
246 bool Flag::is_uintx() const {
247 return strcmp(_type, "uintx") == 0;
248 }
249
250 uintx Flag::get_uintx() const {
251 return *((uintx*) _addr);
252 }
253
254 Flag::Error Flag::set_uintx(uintx value) {
255 Flag::Error error = check_writable(value!=get_uintx());
256 if (error == Flag::SUCCESS) {
257 *((uintx*) _addr) = value;
258 }
259 return error;
260 }
261
262 bool Flag::is_uint64_t() const {
263 return strcmp(_type, "uint64_t") == 0;
264 }
265
266 uint64_t Flag::get_uint64_t() const {
267 return *((uint64_t*) _addr);
268 }
269
270 Flag::Error Flag::set_uint64_t(uint64_t value) {
271 Flag::Error error = check_writable(value!=get_uint64_t());
272 if (error == Flag::SUCCESS) {
273 *((uint64_t*) _addr) = value;
274 }
275 return error;
276 }
277
278 bool Flag::is_size_t() const {
279 return strcmp(_type, "size_t") == 0;
280 }
281
282 size_t Flag::get_size_t() const {
283 return *((size_t*) _addr);
284 }
285
286 Flag::Error Flag::set_size_t(size_t value) {
287 Flag::Error error = check_writable(value!=get_size_t());
288 if (error == Flag::SUCCESS) {
289 *((size_t*) _addr) = value;
290 }
291 return error;
292 }
293
294 bool Flag::is_double() const {
295 return strcmp(_type, "double") == 0;
296 }
297
298 double Flag::get_double() const {
299 return *((double*) _addr);
300 }
301
302 Flag::Error Flag::set_double(double value) {
303 Flag::Error error = check_writable(value!=get_double());
304 if (error == Flag::SUCCESS) {
305 *((double*) _addr) = value;
306 }
307 return error;
308 }
309
310 bool Flag::is_ccstr() const {
311 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
312 }
313
314 bool Flag::ccstr_accumulates() const {
315 return strcmp(_type, "ccstrlist") == 0;
316 }
317
318 ccstr Flag::get_ccstr() const {
319 return *((ccstr*) _addr);
320 }
321
322 Flag::Error Flag::set_ccstr(ccstr value) {
323 Flag::Error error = check_writable(value!=get_ccstr());
324 if (error == Flag::SUCCESS) {
325 *((ccstr*) _addr) = value;
326 }
327 return error;
328 }
329
330
331 Flag::Flags Flag::get_origin() {
332 return Flags(_flags & VALUE_ORIGIN_MASK);
333 }
334
335 void Flag::set_origin(Flags origin) {
336 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
337 Flags new_origin = Flags((origin == COMMAND_LINE) ? Flags(origin | ORIG_COMMAND_LINE) : origin);
338 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | new_origin);
339 }
340
341 bool Flag::is_default() {
342 return (get_origin() == DEFAULT);
343 }
344
345 bool Flag::is_ergonomic() {
346 return (get_origin() == ERGONOMIC);
347 }
348
349 bool Flag::is_command_line() {
350 return (_flags & ORIG_COMMAND_LINE) != 0;
351 }
352
353 void Flag::set_command_line() {
354 _flags = Flags(_flags | ORIG_COMMAND_LINE);
355 }
356
357 bool Flag::is_product() const {
358 return (_flags & KIND_PRODUCT) != 0;
359 }
360
361 bool Flag::is_manageable() const {
362 return (_flags & KIND_MANAGEABLE) != 0;
363 }
364
365 bool Flag::is_diagnostic() const {
366 return (_flags & KIND_DIAGNOSTIC) != 0;
367 }
368
369 bool Flag::is_experimental() const {
370 return (_flags & KIND_EXPERIMENTAL) != 0;
371 }
372
373 bool Flag::is_notproduct() const {
374 return (_flags & KIND_NOT_PRODUCT) != 0;
375 }
376
377 bool Flag::is_develop() const {
378 return (_flags & KIND_DEVELOP) != 0;
379 }
380
381 bool Flag::is_read_write() const {
382 return (_flags & KIND_READ_WRITE) != 0;
383 }
384
385 bool Flag::is_commercial() const {
386 return (_flags & KIND_COMMERCIAL) != 0;
387 }
388
389 /**
390 * Returns if this flag is a constant in the binary. Right now this is
391 * true for notproduct and develop flags in product builds.
392 */
393 bool Flag::is_constant_in_binary() const {
394 #ifdef PRODUCT
395 return is_notproduct() || is_develop();
396 #else
397 return false;
398 #endif
399 }
400
401 bool Flag::is_unlocker() const {
402 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
403 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
404 is_unlocker_ext();
405 }
406
407 bool Flag::is_unlocked() const {
408 if (is_diagnostic()) {
409 return UnlockDiagnosticVMOptions;
410 }
411 if (is_experimental()) {
412 return UnlockExperimentalVMOptions;
413 }
414 return is_unlocked_ext();
415 }
416
417 void Flag::clear_diagnostic() {
418 assert(is_diagnostic(), "sanity");
419 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
420 assert(!is_diagnostic(), "sanity");
421 }
422
423 // Get custom message for this locked flag, or NULL if
424 // none is available. Returns message type produced.
425 Flag::MsgType Flag::get_locked_message(char* buf, int buflen) const {
426 buf[0] = '\0';
427 if (is_diagnostic() && !is_unlocked()) {
428 jio_snprintf(buf, buflen,
429 "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n"
430 "Error: The unlock option must precede '%s'.\n",
431 _name, _name);
432 return Flag::DIAGNOSTIC_FLAG_BUT_LOCKED;
433 }
434 if (is_experimental() && !is_unlocked()) {
435 jio_snprintf(buf, buflen,
436 "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n"
437 "Error: The unlock option must precede '%s'.\n",
438 _name, _name);
439 return Flag::EXPERIMENTAL_FLAG_BUT_LOCKED;
440 }
441 if (is_develop() && is_product_build()) {
442 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
443 _name);
444 return Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD;
445 }
446 if (is_notproduct() && is_product_build()) {
447 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
448 _name);
449 return Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD;
450 }
451 get_locked_message_ext(buf, buflen);
452 return Flag::NONE;
453 }
454
455 bool Flag::is_writeable() const {
456 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
457 }
458
459 // All flags except "manageable" are assumed to be internal flags.
460 // Long term, we need to define a mechanism to specify which flags
461 // are external/stable and change this function accordingly.
462 bool Flag::is_external() const {
463 return is_manageable() || is_external_ext();
464 }
465
466 void Flag::print_on(outputStream* st, bool withComments, bool printRanges) {
467 // Don't print notproduct and develop flags in a product build.
468 if (is_constant_in_binary()) {
469 return;
470 }
471
472 if (!printRanges) {
473 // Use some named constants to make code more readable.
474 const unsigned int nSpaces = 10;
475 const unsigned int maxFlagLen = 40 + nSpaces;
476
477 // The print below assumes that the flag name is 40 characters or less.
478 // This works for most flags, but there are exceptions. Our longest flag
479 // name right now is UseAdaptiveGenerationSizePolicyAtMajorCollection and
480 // its minor collection buddy. These are 48 characters. We use a buffer of
481 // nSpaces spaces below to adjust the space between the flag value and the
482 // column of flag type and origin that is printed in the end of the line.
483 char spaces[nSpaces + 1] = " ";
484 st->print("%9s %-*s = ", _type, maxFlagLen-nSpaces, _name);
485
486 if (is_bool()) {
487 st->print("%-20s", get_bool() ? "true" : "false");
488 } else if (is_int()) {
489 st->print("%-20d", get_int());
490 } else if (is_uint()) {
491 st->print("%-20u", get_uint());
492 } else if (is_intx()) {
493 st->print(INTX_FORMAT_W(-20), get_intx());
494 } else if (is_uintx()) {
495 st->print(UINTX_FORMAT_W(-20), get_uintx());
496 } else if (is_uint64_t()) {
497 st->print(UINT64_FORMAT_W(-20), get_uint64_t());
498 } else if (is_size_t()) {
499 st->print(SIZE_FORMAT_W(-20), get_size_t());
500 } else if (is_double()) {
501 st->print("%-20f", get_double());
502 } else if (is_ccstr()) {
503 const char* cp = get_ccstr();
504 if (cp != NULL) {
505 const char* eol;
506 while ((eol = strchr(cp, '\n')) != NULL) {
507 size_t llen = pointer_delta(eol, cp, sizeof(char));
508 st->print("%.*s", (int)llen, cp);
509 st->cr();
510 cp = eol+1;
511 st->print("%5s %-35s += ", "", _name);
512 }
513 st->print("%-20s", cp);
514 }
515 else st->print("%-20s", "");
516 }
517 // Make sure we do not punch a '\0' at a negative char array index.
518 unsigned int nameLen = (unsigned int)strlen(_name);
519 if (nameLen <= maxFlagLen) {
520 spaces[maxFlagLen - MAX2(maxFlagLen-nSpaces, nameLen)] = '\0';
521 st->print("%s", spaces);
522 }
523 print_kind_and_origin(st);
524
525 #ifndef PRODUCT
526 if (withComments) {
527 st->print("%s", _doc);
528 }
529 #endif
530
531 st->cr();
532
533 } else if (!is_bool() && !is_ccstr()) {
534 st->print("%9s %-50s ", _type, _name);
535
536 RangeStrFunc func = NULL;
537 if (is_int()) {
538 func = Flag::get_int_default_range_str;
539 } else if (is_uint()) {
540 func = Flag::get_uint_default_range_str;
541 } else if (is_intx()) {
542 func = Flag::get_intx_default_range_str;
543 } else if (is_uintx()) {
544 func = Flag::get_uintx_default_range_str;
545 } else if (is_uint64_t()) {
546 func = Flag::get_uint64_t_default_range_str;
547 } else if (is_size_t()) {
548 func = Flag::get_size_t_default_range_str;
549 } else if (is_double()) {
550 func = Flag::get_double_default_range_str;
551 } else {
552 ShouldNotReachHere();
553 }
554 CommandLineFlagRangeList::print(st, _name, func);
555
556 st->print(" %-16s", " ");
557 print_kind_and_origin(st);
558
559 #ifndef PRODUCT
560 if (withComments) {
561 st->print("%s", _doc);
562 }
563 #endif
564
565 st->cr();
566 }
567 }
568
569 void Flag::print_kind_and_origin(outputStream* st) {
570 struct Data {
571 int flag;
572 const char* name;
573 };
574
575 Data data[] = {
576 { KIND_JVMCI, "JVMCI" },
577 { KIND_C1, "C1" },
578 { KIND_C2, "C2" },
579 { KIND_ARCH, "ARCH" },
580 { KIND_SHARK, "SHARK" },
581 { KIND_PLATFORM_DEPENDENT, "pd" },
582 { KIND_PRODUCT, "product" },
583 { KIND_MANAGEABLE, "manageable" },
584 { KIND_DIAGNOSTIC, "diagnostic" },
585 { KIND_EXPERIMENTAL, "experimental" },
586 { KIND_COMMERCIAL, "commercial" },
587 { KIND_NOT_PRODUCT, "notproduct" },
588 { KIND_DEVELOP, "develop" },
589 { KIND_LP64_PRODUCT, "lp64_product" },
590 { KIND_READ_WRITE, "rw" },
591 { -1, "" }
592 };
593
594 if ((_flags & KIND_MASK) != 0) {
595 bool is_first = true;
596 const size_t buffer_size = 64;
597 size_t buffer_used = 0;
598 char kind[buffer_size];
599
600 jio_snprintf(kind, buffer_size, "{");
601 buffer_used++;
602 for (int i = 0; data[i].flag != -1; i++) {
603 Data d = data[i];
604 if ((_flags & d.flag) != 0) {
605 if (is_first) {
606 is_first = false;
607 } else {
608 assert(buffer_used + 1 < buffer_size, "Too small buffer");
609 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, " ");
610 buffer_used++;
611 }
612 size_t length = strlen(d.name);
613 assert(buffer_used + length < buffer_size, "Too small buffer");
614 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "%s", d.name);
615 buffer_used += length;
616 }
617 }
618 assert(buffer_used + 2 <= buffer_size, "Too small buffer");
619 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "}");
620 st->print("%20s", kind);
621 }
622
623 int origin = _flags & VALUE_ORIGIN_MASK;
624 st->print(" {");
625 switch(origin) {
626 case DEFAULT:
627 st->print("default"); break;
628 case COMMAND_LINE:
629 st->print("command line"); break;
630 case ENVIRON_VAR:
631 st->print("environment"); break;
632 case CONFIG_FILE:
633 st->print("config file"); break;
634 case MANAGEMENT:
635 st->print("management"); break;
636 case ERGONOMIC:
637 if (_flags & ORIG_COMMAND_LINE) {
638 st->print("command line, ");
639 }
640 st->print("ergonomic"); break;
641 case ATTACH_ON_DEMAND:
642 st->print("attach"); break;
643 case INTERNAL:
644 st->print("internal"); break;
645 }
646 st->print("}");
647 }
648
649 void Flag::print_as_flag(outputStream* st) {
650 if (is_bool()) {
651 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
652 } else if (is_int()) {
653 st->print("-XX:%s=%d", _name, get_int());
654 } else if (is_uint()) {
655 st->print("-XX:%s=%u", _name, get_uint());
656 } else if (is_intx()) {
657 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
658 } else if (is_uintx()) {
659 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
660 } else if (is_uint64_t()) {
661 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
662 } else if (is_size_t()) {
663 st->print("-XX:%s=" SIZE_FORMAT, _name, get_size_t());
664 } else if (is_double()) {
665 st->print("-XX:%s=%f", _name, get_double());
666 } else if (is_ccstr()) {
667 st->print("-XX:%s=", _name);
668 const char* cp = get_ccstr();
669 if (cp != NULL) {
670 // Need to turn embedded '\n's back into separate arguments
671 // Not so efficient to print one character at a time,
672 // but the choice is to do the transformation to a buffer
673 // and print that. And this need not be efficient.
674 for (; *cp != '\0'; cp += 1) {
675 switch (*cp) {
676 default:
677 st->print("%c", *cp);
678 break;
679 case '\n':
680 st->print(" -XX:%s=", _name);
681 break;
682 }
683 }
684 }
685 } else {
686 ShouldNotReachHere();
687 }
688 }
689
690 const char* Flag::flag_error_str(Flag::Error error) {
691 switch (error) {
692 case Flag::MISSING_NAME: return "MISSING_NAME";
693 case Flag::MISSING_VALUE: return "MISSING_VALUE";
694 case Flag::NON_WRITABLE: return "NON_WRITABLE";
695 case Flag::OUT_OF_BOUNDS: return "OUT_OF_BOUNDS";
696 case Flag::VIOLATES_CONSTRAINT: return "VIOLATES_CONSTRAINT";
697 case Flag::INVALID_FLAG: return "INVALID_FLAG";
698 case Flag::ERR_OTHER: return "ERR_OTHER";
699 case Flag::SUCCESS: return "SUCCESS";
700 default: ShouldNotReachHere(); return "NULL";
701 }
702 }
703
704 // 4991491 do not "optimize out" the was_set false values: omitting them
705 // tickles a Microsoft compiler bug causing flagTable to be malformed
706
707 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) },
708 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
709 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) },
710 #define RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) },
711 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) },
712 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) },
713 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_READ_WRITE) },
714 #define RUNTIME_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP) },
715 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
716 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_NOT_PRODUCT) },
717
718 #define JVMCI_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_PRODUCT) },
719 #define JVMCI_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
720 #define JVMCI_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DIAGNOSTIC) },
721 #define JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) },
722 #define JVMCI_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_EXPERIMENTAL) },
723 #define JVMCI_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DEVELOP) },
724 #define JVMCI_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
725 #define JVMCI_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_JVMCI | Flag::KIND_NOT_PRODUCT) },
726
727 #ifdef _LP64
728 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_LP64_PRODUCT) },
729 #else
730 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
731 #endif // _LP64
732
733 #define C1_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT) },
734 #define C1_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
735 #define C1_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DIAGNOSTIC) },
736 #define C1_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) },
737 #define C1_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP) },
738 #define C1_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
739 #define C1_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_NOT_PRODUCT) },
740
741 #define C2_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT) },
742 #define C2_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
743 #define C2_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC) },
744 #define C2_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) },
745 #define C2_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_EXPERIMENTAL) },
746 #define C2_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP) },
747 #define C2_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
748 #define C2_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_NOT_PRODUCT) },
749
750 #define ARCH_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_PRODUCT) },
751 #define ARCH_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DIAGNOSTIC) },
752 #define ARCH_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_EXPERIMENTAL) },
753 #define ARCH_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DEVELOP) },
754 #define ARCH_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_NOT_PRODUCT) },
755
756 #define SHARK_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT) },
757 #define SHARK_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
758 #define SHARK_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DIAGNOSTIC) },
759 #define SHARK_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DIAGNOSTIC | Flag::KIND_PLATFORM_DEPENDENT) },
760 #define SHARK_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP) },
761 #define SHARK_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
762 #define SHARK_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_NOT_PRODUCT) },
763
764 static Flag flagTable[] = {
765 RUNTIME_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
766 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
767 RUNTIME_PRODUCT_FLAG_STRUCT, \
768 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
769 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
770 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
771 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \
772 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
773 RUNTIME_MANAGEABLE_FLAG_STRUCT, \
774 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \
775 RUNTIME_LP64_PRODUCT_FLAG_STRUCT, \
776 IGNORE_RANGE, \
777 IGNORE_CONSTRAINT, \
778 IGNORE_WRITEABLE)
779 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
780 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
781 RUNTIME_PRODUCT_FLAG_STRUCT, \
782 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
783 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
784 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
785 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
786 IGNORE_RANGE, \
787 IGNORE_CONSTRAINT, \
788 IGNORE_WRITEABLE)
789 #if INCLUDE_ALL_GCS
790 G1_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
791 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
792 RUNTIME_PRODUCT_FLAG_STRUCT, \
793 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
794 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
795 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
796 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \
797 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
798 RUNTIME_MANAGEABLE_FLAG_STRUCT, \
799 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \
800 IGNORE_RANGE, \
801 IGNORE_CONSTRAINT, \
802 IGNORE_WRITEABLE)
803 #endif // INCLUDE_ALL_GCS
804 #if INCLUDE_JVMCI
805 JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_STRUCT, \
806 JVMCI_PD_DEVELOP_FLAG_STRUCT, \
807 JVMCI_PRODUCT_FLAG_STRUCT, \
808 JVMCI_PD_PRODUCT_FLAG_STRUCT, \
809 JVMCI_DIAGNOSTIC_FLAG_STRUCT, \
810 JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT, \
811 JVMCI_EXPERIMENTAL_FLAG_STRUCT, \
812 JVMCI_NOTPRODUCT_FLAG_STRUCT, \
813 IGNORE_RANGE, \
814 IGNORE_CONSTRAINT, \
815 IGNORE_WRITEABLE)
816 #endif // INCLUDE_JVMCI
817 #ifdef COMPILER1
818 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, \
819 C1_PD_DEVELOP_FLAG_STRUCT, \
820 C1_PRODUCT_FLAG_STRUCT, \
821 C1_PD_PRODUCT_FLAG_STRUCT, \
822 C1_DIAGNOSTIC_FLAG_STRUCT, \
823 C1_PD_DIAGNOSTIC_FLAG_STRUCT, \
824 C1_NOTPRODUCT_FLAG_STRUCT, \
825 IGNORE_RANGE, \
826 IGNORE_CONSTRAINT, \
827 IGNORE_WRITEABLE)
828 #endif // COMPILER1
829 #ifdef COMPILER2
830 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, \
831 C2_PD_DEVELOP_FLAG_STRUCT, \
832 C2_PRODUCT_FLAG_STRUCT, \
833 C2_PD_PRODUCT_FLAG_STRUCT, \
834 C2_DIAGNOSTIC_FLAG_STRUCT, \
835 C2_PD_DIAGNOSTIC_FLAG_STRUCT, \
836 C2_EXPERIMENTAL_FLAG_STRUCT, \
837 C2_NOTPRODUCT_FLAG_STRUCT, \
838 IGNORE_RANGE, \
839 IGNORE_CONSTRAINT, \
840 IGNORE_WRITEABLE)
841 #endif // COMPILER2
842 #ifdef SHARK
843 SHARK_FLAGS(SHARK_DEVELOP_FLAG_STRUCT, \
844 SHARK_PD_DEVELOP_FLAG_STRUCT, \
845 SHARK_PRODUCT_FLAG_STRUCT, \
846 SHARK_PD_PRODUCT_FLAG_STRUCT, \
847 SHARK_DIAGNOSTIC_FLAG_STRUCT, \
848 SHARK_PD_DIAGNOSTIC_FLAG_STRUCT, \
849 SHARK_NOTPRODUCT_FLAG_STRUCT, \
850 IGNORE_RANGE, \
851 IGNORE_CONSTRAINT, \
852 IGNORE_WRITEABLE)
853 #endif // SHARK
854 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, \
855 ARCH_PRODUCT_FLAG_STRUCT, \
856 ARCH_DIAGNOSTIC_FLAG_STRUCT, \
857 ARCH_EXPERIMENTAL_FLAG_STRUCT, \
858 ARCH_NOTPRODUCT_FLAG_STRUCT, \
859 IGNORE_RANGE, \
860 IGNORE_CONSTRAINT, \
861 IGNORE_WRITEABLE)
862 FLAGTABLE_EXT
863 {0, NULL, NULL}
864 };
865
866 Flag* Flag::flags = flagTable;
867 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
868
869 inline bool str_equal(const char* s, size_t s_len, const char* q, size_t q_len) {
870 if (s_len != q_len) return false;
871 return memcmp(s, q, q_len) == 0;
872 }
873
874 // Search the flag table for a named flag
875 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
876 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
877 if (str_equal(current->_name, current->get_name_length(), name, length)) {
878 // Found a matching entry.
879 // Don't report notproduct and develop flags in product builds.
880 if (current->is_constant_in_binary()) {
881 return (return_flag ? current : NULL);
882 }
883 // Report locked flags only if allowed.
884 if (!(current->is_unlocked() || current->is_unlocker())) {
885 if (!allow_locked) {
886 // disable use of locked flags, e.g. diagnostic, experimental,
887 // commercial... until they are explicitly unlocked
888 return NULL;
889 }
890 }
891 return current;
892 }
893 }
894 // Flag name is not in the flag table
895 return NULL;
896 }
897
898 // Get or compute the flag name length
899 size_t Flag::get_name_length() {
900 if (_name_len == 0) {
901 _name_len = strlen(_name);
902 }
903 return _name_len;
904 }
905
906 // Compute string similarity based on Dice's coefficient
907 static float str_similar(const char* str1, const char* str2, size_t len2) {
908 int len1 = (int) strlen(str1);
909 int total = len1 + (int) len2;
910
911 int hit = 0;
912
913 for (int i = 0; i < len1 -1; ++i) {
914 for (int j = 0; j < (int) len2 -1; ++j) {
915 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
916 ++hit;
917 break;
918 }
919 }
920 }
921
922 return 2.0f * (float) hit / (float) total;
923 }
924
925 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
926 float VMOptionsFuzzyMatchSimilarity = 0.7f;
927 Flag* match = NULL;
928 float score;
929 float max_score = -1;
930
931 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
932 score = str_similar(current->_name, name, length);
933 if (score > max_score) {
934 max_score = score;
935 match = current;
936 }
937 }
938
939 if (!(match->is_unlocked() || match->is_unlocker())) {
940 if (!allow_locked) {
941 return NULL;
942 }
943 }
944
945 if (max_score < VMOptionsFuzzyMatchSimilarity) {
946 return NULL;
947 }
948
949 return match;
950 }
951
952 // Returns the address of the index'th element
953 static Flag* address_of_flag(CommandLineFlagWithType flag) {
954 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
955 return &Flag::flags[flag];
956 }
957
958 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
959 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
960 Flag* f = &Flag::flags[flag];
961 return f->is_default();
962 }
963
964 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
965 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
966 Flag* f = &Flag::flags[flag];
967 return f->is_ergonomic();
968 }
969
970 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
971 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
972 Flag* f = &Flag::flags[flag];
973 return f->is_command_line();
974 }
975
976 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
977 Flag* result = Flag::find_flag((char*)name, strlen(name));
978 if (result == NULL) return false;
979 *value = result->is_command_line();
980 return true;
981 }
982
983 void CommandLineFlagsEx::setOnCmdLine(CommandLineFlagWithType flag) {
984 Flag* faddr = address_of_flag(flag);
985 assert(faddr != NULL, "Unknown flag");
986 faddr->set_command_line();
987 }
988
989 template<class E, class T>
990 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin) {
991 E e;
992 e.set_name(name);
993 e.set_oldValue(old_value);
994 e.set_newValue(new_value);
995 e.set_origin(origin);
996 e.commit();
997 }
998
999 static Flag::Error apply_constraint_and_check_range_bool(const char* name, bool new_value, bool verbose) {
1000 Flag::Error status = Flag::SUCCESS;
1001 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1002 if (constraint != NULL) {
1003 status = constraint->apply_bool(new_value, verbose);
1004 }
1005 return status;
1006 }
1007
1008 Flag::Error CommandLineFlags::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) {
1009 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1010 if (result == NULL) return Flag::INVALID_FLAG;
1011 if (!result->is_bool()) return Flag::WRONG_FORMAT;
1012 *value = result->get_bool();
1013 return Flag::SUCCESS;
1014 }
1015
1016 Flag::Error CommandLineFlags::boolAtPut(Flag* flag, bool* value, Flag::Flags origin) {
1017 const char* name;
1018 if (flag == NULL) return Flag::INVALID_FLAG;
1019 if (!flag->is_bool()) return Flag::WRONG_FORMAT;
1020 name = flag->_name;
1021 Flag::Error check = apply_constraint_and_check_range_bool(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1022 if (check != Flag::SUCCESS) return check;
1023 bool old_value = flag->get_bool();
1024 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
1025 check = flag->set_bool(*value);
1026 *value = old_value;
1027 flag->set_origin(origin);
1028 return check;
1029 }
1030
1031 Flag::Error CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) {
1032 Flag* result = Flag::find_flag(name, len);
1033 return boolAtPut(result, value, origin);
1034 }
1035
1036 Flag::Error CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
1037 Flag* faddr = address_of_flag(flag);
1038 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
1039 return CommandLineFlags::boolAtPut(faddr, &value, origin);
1040 }
1041
1042 static Flag::Error apply_constraint_and_check_range_int(const char* name, int new_value, bool verbose) {
1043 Flag::Error status = Flag::SUCCESS;
1044 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1045 if (range != NULL) {
1046 status = range->check_int(new_value, verbose);
1047 }
1048 if (status == Flag::SUCCESS) {
1049 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1050 if (constraint != NULL) {
1051 status = constraint->apply_int(new_value, verbose);
1052 }
1053 }
1054 return status;
1055 }
1056
1057 Flag::Error CommandLineFlags::intAt(const char* name, size_t len, int* value, bool allow_locked, bool return_flag) {
1058 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1059 if (result == NULL) return Flag::INVALID_FLAG;
1060 if (!result->is_int()) return Flag::WRONG_FORMAT;
1061 *value = result->get_int();
1062 return Flag::SUCCESS;
1063 }
1064
1065 Flag::Error CommandLineFlags::intAtPut(Flag* flag, int* value, Flag::Flags origin) {
1066 const char* name;
1067 if (flag == NULL) return Flag::INVALID_FLAG;
1068 if (!flag->is_int()) return Flag::WRONG_FORMAT;
1069 name = flag->_name;
1070 Flag::Error check = apply_constraint_and_check_range_int(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1071 if (check != Flag::SUCCESS) return check;
1072 int old_value = flag->get_int();
1073 trace_flag_changed<EventIntFlagChanged, s4>(name, old_value, *value, origin);
1074 check = flag->set_int(*value);
1075 *value = old_value;
1076 flag->set_origin(origin);
1077 return check;
1078 }
1079
1080 Flag::Error CommandLineFlags::intAtPut(const char* name, size_t len, int* value, Flag::Flags origin) {
1081 Flag* result = Flag::find_flag(name, len);
1082 return intAtPut(result, value, origin);
1083 }
1084
1085 Flag::Error CommandLineFlagsEx::intAtPut(CommandLineFlagWithType flag, int value, Flag::Flags origin) {
1086 Flag* faddr = address_of_flag(flag);
1087 guarantee(faddr != NULL && faddr->is_int(), "wrong flag type");
1088 return CommandLineFlags::intAtPut(faddr, &value, origin);
1089 }
1090
1091 static Flag::Error apply_constraint_and_check_range_uint(const char* name, uint new_value, bool verbose) {
1092 Flag::Error status = Flag::SUCCESS;
1093 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1094 if (range != NULL) {
1095 status = range->check_uint(new_value, verbose);
1096 }
1097 if (status == Flag::SUCCESS) {
1098 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1099 if (constraint != NULL) {
1100 status = constraint->apply_uint(new_value, verbose);
1101 }
1102 }
1103 return status;
1104 }
1105
1106 Flag::Error CommandLineFlags::uintAt(const char* name, size_t len, uint* value, bool allow_locked, bool return_flag) {
1107 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1108 if (result == NULL) return Flag::INVALID_FLAG;
1109 if (!result->is_uint()) return Flag::WRONG_FORMAT;
1110 *value = result->get_uint();
1111 return Flag::SUCCESS;
1112 }
1113
1114 Flag::Error CommandLineFlags::uintAtPut(Flag* flag, uint* value, Flag::Flags origin) {
1115 const char* name;
1116 if (flag == NULL) return Flag::INVALID_FLAG;
1117 if (!flag->is_uint()) return Flag::WRONG_FORMAT;
1118 name = flag->_name;
1119 Flag::Error check = apply_constraint_and_check_range_uint(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1120 if (check != Flag::SUCCESS) return check;
1121 uint old_value = flag->get_uint();
1122 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(name, old_value, *value, origin);
1123 check = flag->set_uint(*value);
1124 *value = old_value;
1125 flag->set_origin(origin);
1126 return check;
1127 }
1128
1129 Flag::Error CommandLineFlags::uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin) {
1130 Flag* result = Flag::find_flag(name, len);
1131 return uintAtPut(result, value, origin);
1132 }
1133
1134 Flag::Error CommandLineFlagsEx::uintAtPut(CommandLineFlagWithType flag, uint value, Flag::Flags origin) {
1135 Flag* faddr = address_of_flag(flag);
1136 guarantee(faddr != NULL && faddr->is_uint(), "wrong flag type");
1137 return CommandLineFlags::uintAtPut(faddr, &value, origin);
1138 }
1139
1140 Flag::Error CommandLineFlags::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) {
1141 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1142 if (result == NULL) return Flag::INVALID_FLAG;
1143 if (!result->is_intx()) return Flag::WRONG_FORMAT;
1144 *value = result->get_intx();
1145 return Flag::SUCCESS;
1146 }
1147
1148 static Flag::Error apply_constraint_and_check_range_intx(const char* name, intx new_value, bool verbose) {
1149 Flag::Error status = Flag::SUCCESS;
1150 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1151 if (range != NULL) {
1152 status = range->check_intx(new_value, verbose);
1153 }
1154 if (status == Flag::SUCCESS) {
1155 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1156 if (constraint != NULL) {
1157 status = constraint->apply_intx(new_value, verbose);
1158 }
1159 }
1160 return status;
1161 }
1162
1163 Flag::Error CommandLineFlags::intxAtPut(Flag* flag, intx* value, Flag::Flags origin) {
1164 const char* name;
1165 if (flag == NULL) return Flag::INVALID_FLAG;
1166 if (!flag->is_intx()) return Flag::WRONG_FORMAT;
1167 name = flag->_name;
1168 Flag::Error check = apply_constraint_and_check_range_intx(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1169 if (check != Flag::SUCCESS) return check;
1170 intx old_value = flag->get_intx();
1171 trace_flag_changed<EventLongFlagChanged, intx>(name, old_value, *value, origin);
1172 check = flag->set_intx(*value);
1173 *value = old_value;
1174 flag->set_origin(origin);
1175 return check;
1176 }
1177
1178 Flag::Error CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) {
1179 Flag* result = Flag::find_flag(name, len);
1180 return intxAtPut(result, value, origin);
1181 }
1182
1183 Flag::Error CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
1184 Flag* faddr = address_of_flag(flag);
1185 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
1186 return CommandLineFlags::intxAtPut(faddr, &value, origin);
1187 }
1188
1189 Flag::Error CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
1190 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1191 if (result == NULL) return Flag::INVALID_FLAG;
1192 if (!result->is_uintx()) return Flag::WRONG_FORMAT;
1193 *value = result->get_uintx();
1194 return Flag::SUCCESS;
1195 }
1196
1197 static Flag::Error apply_constraint_and_check_range_uintx(const char* name, uintx new_value, bool verbose) {
1198 Flag::Error status = Flag::SUCCESS;
1199 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1200 if (range != NULL) {
1201 status = range->check_uintx(new_value, verbose);
1202 }
1203 if (status == Flag::SUCCESS) {
1204 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1205 if (constraint != NULL) {
1206 status = constraint->apply_uintx(new_value, verbose);
1207 }
1208 }
1209 return status;
1210 }
1211
1212 Flag::Error CommandLineFlags::uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin) {
1213 const char* name;
1214 if (flag == NULL) return Flag::INVALID_FLAG;
1215 if (!flag->is_uintx()) return Flag::WRONG_FORMAT;
1216 name = flag->_name;
1217 Flag::Error check = apply_constraint_and_check_range_uintx(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1218 if (check != Flag::SUCCESS) return check;
1219 uintx old_value = flag->get_uintx();
1220 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1221 check = flag->set_uintx(*value);
1222 *value = old_value;
1223 flag->set_origin(origin);
1224 return check;
1225 }
1226
1227 Flag::Error CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) {
1228 Flag* result = Flag::find_flag(name, len);
1229 return uintxAtPut(result, value, origin);
1230 }
1231
1232 Flag::Error CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
1233 Flag* faddr = address_of_flag(flag);
1234 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
1235 return CommandLineFlags::uintxAtPut(faddr, &value, origin);
1236 }
1237
1238 Flag::Error CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) {
1239 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1240 if (result == NULL) return Flag::INVALID_FLAG;
1241 if (!result->is_uint64_t()) return Flag::WRONG_FORMAT;
1242 *value = result->get_uint64_t();
1243 return Flag::SUCCESS;
1244 }
1245
1246 static Flag::Error apply_constraint_and_check_range_uint64_t(const char* name, uint64_t new_value, bool verbose) {
1247 Flag::Error status = Flag::SUCCESS;
1248 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1249 if (range != NULL) {
1250 status = range->check_uint64_t(new_value, verbose);
1251 }
1252 if (status == Flag::SUCCESS) {
1253 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1254 if (constraint != NULL) {
1255 status = constraint->apply_uint64_t(new_value, verbose);
1256 }
1257 }
1258 return status;
1259 }
1260
1261 Flag::Error CommandLineFlags::uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin) {
1262 const char* name;
1263 if (flag == NULL) return Flag::INVALID_FLAG;
1264 if (!flag->is_uint64_t()) return Flag::WRONG_FORMAT;
1265 name = flag->_name;
1266 Flag::Error check = apply_constraint_and_check_range_uint64_t(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1267 if (check != Flag::SUCCESS) return check;
1268 uint64_t old_value = flag->get_uint64_t();
1269 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1270 check = flag->set_uint64_t(*value);
1271 *value = old_value;
1272 flag->set_origin(origin);
1273 return check;
1274 }
1275
1276 Flag::Error CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) {
1277 Flag* result = Flag::find_flag(name, len);
1278 return uint64_tAtPut(result, value, origin);
1279 }
1280
1281 Flag::Error CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
1282 Flag* faddr = address_of_flag(flag);
1283 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
1284 return CommandLineFlags::uint64_tAtPut(faddr, &value, origin);
1285 }
1286
1287 Flag::Error CommandLineFlags::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) {
1288 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1289 if (result == NULL) return Flag::INVALID_FLAG;
1290 if (!result->is_size_t()) return Flag::WRONG_FORMAT;
1291 *value = result->get_size_t();
1292 return Flag::SUCCESS;
1293 }
1294
1295 static Flag::Error apply_constraint_and_check_range_size_t(const char* name, size_t new_value, bool verbose) {
1296 Flag::Error status = Flag::SUCCESS;
1297 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1298 if (range != NULL) {
1299 status = range->check_size_t(new_value, verbose);
1300 }
1301 if (status == Flag::SUCCESS) {
1302 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1303 if (constraint != NULL) {
1304 status = constraint->apply_size_t(new_value, verbose);
1305 }
1306 }
1307 return status;
1308 }
1309
1310
1311 Flag::Error CommandLineFlags::size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin) {
1312 const char* name;
1313 if (flag == NULL) return Flag::INVALID_FLAG;
1314 if (!flag->is_size_t()) return Flag::WRONG_FORMAT;
1315 name = flag->_name;
1316 Flag::Error check = apply_constraint_and_check_range_size_t(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1317 if (check != Flag::SUCCESS) return check;
1318 size_t old_value = flag->get_size_t();
1319 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1320 check = flag->set_size_t(*value);
1321 *value = old_value;
1322 flag->set_origin(origin);
1323 return check;
1324 }
1325
1326 Flag::Error CommandLineFlags::size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin) {
1327 Flag* result = Flag::find_flag(name, len);
1328 return size_tAtPut(result, value, origin);
1329 }
1330
1331 Flag::Error CommandLineFlagsEx::size_tAtPut(CommandLineFlagWithType flag, size_t value, Flag::Flags origin) {
1332 Flag* faddr = address_of_flag(flag);
1333 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type");
1334 return CommandLineFlags::size_tAtPut(faddr, &value, origin);
1335 }
1336
1337 Flag::Error CommandLineFlags::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) {
1338 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1339 if (result == NULL) return Flag::INVALID_FLAG;
1340 if (!result->is_double()) return Flag::WRONG_FORMAT;
1341 *value = result->get_double();
1342 return Flag::SUCCESS;
1343 }
1344
1345 static Flag::Error apply_constraint_and_check_range_double(const char* name, double new_value, bool verbose) {
1346 Flag::Error status = Flag::SUCCESS;
1347 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1348 if (range != NULL) {
1349 status = range->check_double(new_value, verbose);
1350 }
1351 if (status == Flag::SUCCESS) {
1352 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1353 if (constraint != NULL) {
1354 status = constraint->apply_double(new_value, verbose);
1355 }
1356 }
1357 return status;
1358 }
1359
1360 Flag::Error CommandLineFlags::doubleAtPut(Flag* flag, double* value, Flag::Flags origin) {
1361 const char* name;
1362 if (flag == NULL) return Flag::INVALID_FLAG;
1363 if (!flag->is_double()) return Flag::WRONG_FORMAT;
1364 name = flag->_name;
1365 Flag::Error check = apply_constraint_and_check_range_double(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1366 if (check != Flag::SUCCESS) return check;
1367 double old_value = flag->get_double();
1368 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
1369 check = flag->set_double(*value);
1370 *value = old_value;
1371 flag->set_origin(origin);
1372 return check;
1373 }
1374
1375 Flag::Error CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) {
1376 Flag* result = Flag::find_flag(name, len);
1377 return doubleAtPut(result, value, origin);
1378 }
1379
1380 Flag::Error CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
1381 Flag* faddr = address_of_flag(flag);
1382 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
1383 return CommandLineFlags::doubleAtPut(faddr, &value, origin);
1384 }
1385
1386 Flag::Error CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) {
1387 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1388 if (result == NULL) return Flag::INVALID_FLAG;
1389 if (!result->is_ccstr()) return Flag::WRONG_FORMAT;
1390 *value = result->get_ccstr();
1391 return Flag::SUCCESS;
1392 }
1393
1394 Flag::Error CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
1395 Flag* result = Flag::find_flag(name, len);
1396 if (result == NULL) return Flag::INVALID_FLAG;
1397 if (!result->is_ccstr()) return Flag::WRONG_FORMAT;
1398 ccstr old_value = result->get_ccstr();
1399 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
1400 char* new_value = NULL;
1401 if (*value != NULL) {
1402 new_value = os::strdup_check_oom(*value);
1403 }
1404 Flag::Error check = result->set_ccstr(new_value);
1405 if (result->is_default() && old_value != NULL) {
1406 // Prior value is NOT heap allocated, but was a literal constant.
1407 old_value = os::strdup_check_oom(old_value);
1408 }
1409 *value = old_value;
1410 result->set_origin(origin);
1411 return check;
1412 }
1413
1414 Flag::Error CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
1415 Flag* faddr = address_of_flag(flag);
1416 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
1417 ccstr old_value = faddr->get_ccstr();
1418 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
1419 char* new_value = os::strdup_check_oom(value);
1420 Flag::Error check = faddr->set_ccstr(new_value);
1421 if (!faddr->is_default() && old_value != NULL) {
1422 // Prior value is heap allocated so free it.
1423 FREE_C_HEAP_ARRAY(char, old_value);
1424 }
1425 faddr->set_origin(origin);
1426 return check;
1427 }
1428
1429 extern "C" {
1430 static int compare_flags(const void* void_a, const void* void_b) {
1431 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
1432 }
1433 }
1434
1435 void CommandLineFlags::printSetFlags(outputStream* out) {
1436 // Print which flags were set on the command line
1437 // note: this method is called before the thread structure is in place
1438 // which means resource allocation cannot be used.
1439
1440 // The last entry is the null entry.
1441 const size_t length = Flag::numFlags - 1;
1442
1443 // Sort
1444 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtArguments);
1445 for (size_t i = 0; i < length; i++) {
1446 array[i] = &flagTable[i];
1447 }
1448 qsort(array, length, sizeof(Flag*), compare_flags);
1449
1450 // Print
1451 for (size_t i = 0; i < length; i++) {
1452 if (array[i]->get_origin() /* naked field! */) {
1453 array[i]->print_as_flag(out);
1454 out->print(" ");
1455 }
1456 }
1457 out->cr();
1458 FREE_C_HEAP_ARRAY(Flag*, array);
1459 }
1460
1461 #ifndef PRODUCT
1462
1463 void CommandLineFlags::verify() {
1464 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
1465 }
1466
1467 #endif // PRODUCT
1468
1469 void CommandLineFlags::printFlags(outputStream* out, bool withComments, bool printRanges) {
1470 // Print the flags sorted by name
1471 // note: this method is called before the thread structure is in place
1472 // which means resource allocation cannot be used.
1473
1474 // The last entry is the null entry.
1475 const size_t length = Flag::numFlags - 1;
1476
1477 // Sort
1478 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtArguments);
1479 for (size_t i = 0; i < length; i++) {
1480 array[i] = &flagTable[i];
1481 }
1482 qsort(array, length, sizeof(Flag*), compare_flags);
1483
1484 // Print
1485 if (!printRanges) {
1486 out->print_cr("[Global flags]");
1487 } else {
1488 out->print_cr("[Global flags ranges]");
1489 }
1490
1491 for (size_t i = 0; i < length; i++) {
1492 if (array[i]->is_unlocked()) {
1493 array[i]->print_on(out, withComments, printRanges);
1494 }
1495 }
1496 FREE_C_HEAP_ARRAY(Flag*, array);
1497 }