1 /*
2 * Copyright (c) 1997, 2016, 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 #include "gc/epsilon/epsilon_globals.hpp"
43 #endif // INCLUDE_ALL_GCS
44 #ifdef COMPILER1
45 #include "c1/c1_globals.hpp"
46 #endif
47 #if INCLUDE_JVMCI
48 #include "jvmci/jvmci_globals.hpp"
49 #endif
50 #ifdef COMPILER2
51 #include "opto/c2_globals.hpp"
52 #endif
53 #ifdef SHARK
54 #include "shark/shark_globals.hpp"
55 #endif
56
57 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \
58 MATERIALIZE_PD_DEVELOPER_FLAG, \
59 MATERIALIZE_PRODUCT_FLAG, \
60 MATERIALIZE_PD_PRODUCT_FLAG, \
61 MATERIALIZE_DIAGNOSTIC_FLAG, \
62 MATERIALIZE_PD_DIAGNOSTIC_FLAG, \
63 MATERIALIZE_EXPERIMENTAL_FLAG, \
64 MATERIALIZE_NOTPRODUCT_FLAG, \
65 MATERIALIZE_MANAGEABLE_FLAG, \
66 MATERIALIZE_PRODUCT_RW_FLAG, \
67 MATERIALIZE_LP64_PRODUCT_FLAG, \
68 IGNORE_RANGE, \
69 IGNORE_CONSTRAINT, \
70 IGNORE_WRITEABLE)
71
72 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \
73 MATERIALIZE_PD_DEVELOPER_FLAG, \
74 MATERIALIZE_PRODUCT_FLAG, \
75 MATERIALIZE_PD_PRODUCT_FLAG, \
76 MATERIALIZE_DIAGNOSTIC_FLAG, \
77 MATERIALIZE_PD_DIAGNOSTIC_FLAG, \
78 MATERIALIZE_NOTPRODUCT_FLAG, \
79 IGNORE_RANGE, \
80 IGNORE_CONSTRAINT, \
81 IGNORE_WRITEABLE)
82
83 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \
84 MATERIALIZE_PRODUCT_FLAG, \
85 MATERIALIZE_DIAGNOSTIC_FLAG, \
86 MATERIALIZE_EXPERIMENTAL_FLAG, \
87 MATERIALIZE_NOTPRODUCT_FLAG, \
88 IGNORE_RANGE, \
89 IGNORE_CONSTRAINT, \
90 IGNORE_WRITEABLE)
91
92 MATERIALIZE_FLAGS_EXT
93
94 #define DEFAULT_RANGE_STR_CHUNK_SIZE 64
95 static char* create_range_str(const char *fmt, ...) {
96 static size_t string_length = DEFAULT_RANGE_STR_CHUNK_SIZE;
97 static char* range_string = NEW_C_HEAP_ARRAY(char, string_length, mtLogging);
98
99 int size_needed = 0;
100 do {
101 va_list args;
102 va_start(args, fmt);
103 size_needed = jio_vsnprintf(range_string, string_length, fmt, args);
104 va_end(args);
105
106 if (size_needed < 0) {
107 string_length += DEFAULT_RANGE_STR_CHUNK_SIZE;
108 range_string = REALLOC_C_HEAP_ARRAY(char, range_string, string_length, mtLogging);
109 guarantee(range_string != NULL, "create_range_str string should not be NULL");
110 }
111 } while (size_needed < 0);
112
113 return range_string;
114 }
115
116 const char* Flag::get_int_default_range_str() {
117 return create_range_str("[ " INT32_FORMAT_W(-25) " ... " INT32_FORMAT_W(25) " ]", INT_MIN, INT_MAX);
118 }
119
120 const char* Flag::get_uint_default_range_str() {
121 return create_range_str("[ " UINT32_FORMAT_W(-25) " ... " UINT32_FORMAT_W(25) " ]", 0, UINT_MAX);
122 }
123
124 const char* Flag::get_intx_default_range_str() {
125 return create_range_str("[ " INTX_FORMAT_W(-25) " ... " INTX_FORMAT_W(25) " ]", min_intx, max_intx);
126 }
127
128 const char* Flag::get_uintx_default_range_str() {
129 return create_range_str("[ " UINTX_FORMAT_W(-25) " ... " UINTX_FORMAT_W(25) " ]", 0, max_uintx);
130 }
131
132 const char* Flag::get_uint64_t_default_range_str() {
133 return create_range_str("[ " UINT64_FORMAT_W(-25) " ... " UINT64_FORMAT_W(25) " ]", 0, uint64_t(max_juint));
134 }
135
136 const char* Flag::get_size_t_default_range_str() {
137 return create_range_str("[ " SIZE_FORMAT_W(-25) " ... " SIZE_FORMAT_W(25) " ]", 0, SIZE_MAX);
138 }
139
140 const char* Flag::get_double_default_range_str() {
141 return create_range_str("[ %-25.3f ... %25.3f ]", DBL_MIN, DBL_MAX);
142 }
143
144 static bool is_product_build() {
145 #ifdef PRODUCT
146 return true;
147 #else
148 return false;
149 #endif
150 }
151
152 Flag::Error Flag::check_writable(bool changed) {
153 if (is_constant_in_binary()) {
154 fatal("flag is constant: %s", _name);
155 }
156
157 Flag::Error error = Flag::SUCCESS;
158 if (changed) {
159 CommandLineFlagWriteable* writeable = CommandLineFlagWriteableList::find(_name);
160 if (writeable) {
161 if (writeable->is_writeable() == false) {
162 switch (writeable->type())
163 {
164 case CommandLineFlagWriteable::Once:
165 error = Flag::SET_ONLY_ONCE;
166 jio_fprintf(defaultStream::error_stream(), "Error: %s may not be set more than once\n", _name);
167 break;
168 case CommandLineFlagWriteable::CommandLineOnly:
169 error = Flag::COMMAND_LINE_ONLY;
170 jio_fprintf(defaultStream::error_stream(), "Error: %s may be modified only from commad line\n", _name);
171 break;
172 default:
173 ShouldNotReachHere();
174 break;
175 }
176 }
177 writeable->mark_once();
178 }
179 }
180 return error;
181 }
182
183 bool Flag::is_bool() const {
184 return strcmp(_type, "bool") == 0;
185 }
186
187 bool Flag::get_bool() const {
188 return *((bool*) _addr);
189 }
190
191 Flag::Error Flag::set_bool(bool value) {
192 Flag::Error error = check_writable(value!=get_bool());
193 if (error == Flag::SUCCESS) {
194 *((bool*) _addr) = value;
195 }
196 return error;
197 }
198
199 bool Flag::is_int() const {
200 return strcmp(_type, "int") == 0;
201 }
202
203 int Flag::get_int() const {
204 return *((int*) _addr);
205 }
206
207 Flag::Error Flag::set_int(int value) {
208 Flag::Error error = check_writable(value!=get_int());
209 if (error == Flag::SUCCESS) {
210 *((int*) _addr) = value;
211 }
212 return error;
213 }
214
215 bool Flag::is_uint() const {
216 return strcmp(_type, "uint") == 0;
217 }
218
219 uint Flag::get_uint() const {
220 return *((uint*) _addr);
221 }
222
223 Flag::Error Flag::set_uint(uint value) {
224 Flag::Error error = check_writable(value!=get_uint());
225 if (error == Flag::SUCCESS) {
226 *((uint*) _addr) = value;
227 }
228 return error;
229 }
230
231 bool Flag::is_intx() const {
232 return strcmp(_type, "intx") == 0;
233 }
234
235 intx Flag::get_intx() const {
236 return *((intx*) _addr);
237 }
238
239 Flag::Error Flag::set_intx(intx value) {
240 Flag::Error error = check_writable(value!=get_intx());
241 if (error == Flag::SUCCESS) {
242 *((intx*) _addr) = value;
243 }
244 return error;
245 }
246
247 bool Flag::is_uintx() const {
248 return strcmp(_type, "uintx") == 0;
249 }
250
251 uintx Flag::get_uintx() const {
252 return *((uintx*) _addr);
253 }
254
255 Flag::Error Flag::set_uintx(uintx value) {
256 Flag::Error error = check_writable(value!=get_uintx());
257 if (error == Flag::SUCCESS) {
258 *((uintx*) _addr) = value;
259 }
260 return error;
261 }
262
263 bool Flag::is_uint64_t() const {
264 return strcmp(_type, "uint64_t") == 0;
265 }
266
267 uint64_t Flag::get_uint64_t() const {
268 return *((uint64_t*) _addr);
269 }
270
271 Flag::Error Flag::set_uint64_t(uint64_t value) {
272 Flag::Error error = check_writable(value!=get_uint64_t());
273 if (error == Flag::SUCCESS) {
274 *((uint64_t*) _addr) = value;
275 }
276 return error;
277 }
278
279 bool Flag::is_size_t() const {
280 return strcmp(_type, "size_t") == 0;
281 }
282
283 size_t Flag::get_size_t() const {
284 return *((size_t*) _addr);
285 }
286
287 Flag::Error Flag::set_size_t(size_t value) {
288 Flag::Error error = check_writable(value!=get_size_t());
289 if (error == Flag::SUCCESS) {
290 *((size_t*) _addr) = value;
291 }
292 return error;
293 }
294
295 bool Flag::is_double() const {
296 return strcmp(_type, "double") == 0;
297 }
298
299 double Flag::get_double() const {
300 return *((double*) _addr);
301 }
302
303 Flag::Error Flag::set_double(double value) {
304 Flag::Error error = check_writable(value!=get_double());
305 if (error == Flag::SUCCESS) {
306 *((double*) _addr) = value;
307 }
308 return error;
309 }
310
311 bool Flag::is_ccstr() const {
312 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
313 }
314
315 bool Flag::ccstr_accumulates() const {
316 return strcmp(_type, "ccstrlist") == 0;
317 }
318
319 ccstr Flag::get_ccstr() const {
320 return *((ccstr*) _addr);
321 }
322
323 Flag::Error Flag::set_ccstr(ccstr value) {
324 Flag::Error error = check_writable(value!=get_ccstr());
325 if (error == Flag::SUCCESS) {
326 *((ccstr*) _addr) = value;
327 }
328 return error;
329 }
330
331
332 Flag::Flags Flag::get_origin() {
333 return Flags(_flags & VALUE_ORIGIN_MASK);
334 }
335
336 void Flag::set_origin(Flags origin) {
337 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
338 Flags new_origin = Flags((origin == COMMAND_LINE) ? Flags(origin | ORIG_COMMAND_LINE) : origin);
339 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | new_origin);
340 }
341
342 bool Flag::is_default() {
343 return (get_origin() == DEFAULT);
344 }
345
346 bool Flag::is_ergonomic() {
347 return (get_origin() == ERGONOMIC);
348 }
349
350 bool Flag::is_command_line() {
351 return (_flags & ORIG_COMMAND_LINE) != 0;
352 }
353
354 void Flag::set_command_line() {
355 _flags = Flags(_flags | ORIG_COMMAND_LINE);
356 }
357
358 bool Flag::is_product() const {
359 return (_flags & KIND_PRODUCT) != 0;
360 }
361
362 bool Flag::is_manageable() const {
363 return (_flags & KIND_MANAGEABLE) != 0;
364 }
365
366 bool Flag::is_diagnostic() const {
367 return (_flags & KIND_DIAGNOSTIC) != 0;
368 }
369
370 bool Flag::is_experimental() const {
371 return (_flags & KIND_EXPERIMENTAL) != 0;
372 }
373
374 bool Flag::is_notproduct() const {
375 return (_flags & KIND_NOT_PRODUCT) != 0;
376 }
377
378 bool Flag::is_develop() const {
379 return (_flags & KIND_DEVELOP) != 0;
380 }
381
382 bool Flag::is_read_write() const {
383 return (_flags & KIND_READ_WRITE) != 0;
384 }
385
386 bool Flag::is_commercial() const {
387 return (_flags & KIND_COMMERCIAL) != 0;
388 }
389
390 /**
391 * Returns if this flag is a constant in the binary. Right now this is
392 * true for notproduct and develop flags in product builds.
393 */
394 bool Flag::is_constant_in_binary() const {
395 #ifdef PRODUCT
396 return is_notproduct() || is_develop();
397 #else
398 return false;
399 #endif
400 }
401
402 bool Flag::is_unlocker() const {
403 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
404 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
405 is_unlocker_ext();
406 }
407
408 bool Flag::is_unlocked() const {
409 if (is_diagnostic()) {
410 return UnlockDiagnosticVMOptions;
411 }
412 if (is_experimental()) {
413 return UnlockExperimentalVMOptions;
414 }
415 return is_unlocked_ext();
416 }
417
418 void Flag::unlock_diagnostic() {
419 assert(is_diagnostic(), "sanity");
420 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
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 EPSILON_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
804 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
805 RUNTIME_PRODUCT_FLAG_STRUCT, \
806 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
807 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
808 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
809 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \
810 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
811 RUNTIME_MANAGEABLE_FLAG_STRUCT, \
812 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \
813 IGNORE_RANGE, \
814 IGNORE_CONSTRAINT, \
815 IGNORE_WRITEABLE)
816 #endif // INCLUDE_ALL_GCS
817 #if INCLUDE_JVMCI
818 JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_STRUCT, \
819 JVMCI_PD_DEVELOP_FLAG_STRUCT, \
820 JVMCI_PRODUCT_FLAG_STRUCT, \
821 JVMCI_PD_PRODUCT_FLAG_STRUCT, \
822 JVMCI_DIAGNOSTIC_FLAG_STRUCT, \
823 JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT, \
824 JVMCI_EXPERIMENTAL_FLAG_STRUCT, \
825 JVMCI_NOTPRODUCT_FLAG_STRUCT, \
826 IGNORE_RANGE, \
827 IGNORE_CONSTRAINT, \
828 IGNORE_WRITEABLE)
829 #endif // INCLUDE_JVMCI
830 #ifdef COMPILER1
831 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, \
832 C1_PD_DEVELOP_FLAG_STRUCT, \
833 C1_PRODUCT_FLAG_STRUCT, \
834 C1_PD_PRODUCT_FLAG_STRUCT, \
835 C1_DIAGNOSTIC_FLAG_STRUCT, \
836 C1_PD_DIAGNOSTIC_FLAG_STRUCT, \
837 C1_NOTPRODUCT_FLAG_STRUCT, \
838 IGNORE_RANGE, \
839 IGNORE_CONSTRAINT, \
840 IGNORE_WRITEABLE)
841 #endif // COMPILER1
842 #ifdef COMPILER2
843 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, \
844 C2_PD_DEVELOP_FLAG_STRUCT, \
845 C2_PRODUCT_FLAG_STRUCT, \
846 C2_PD_PRODUCT_FLAG_STRUCT, \
847 C2_DIAGNOSTIC_FLAG_STRUCT, \
848 C2_PD_DIAGNOSTIC_FLAG_STRUCT, \
849 C2_EXPERIMENTAL_FLAG_STRUCT, \
850 C2_NOTPRODUCT_FLAG_STRUCT, \
851 IGNORE_RANGE, \
852 IGNORE_CONSTRAINT, \
853 IGNORE_WRITEABLE)
854 #endif // COMPILER2
855 #ifdef SHARK
856 SHARK_FLAGS(SHARK_DEVELOP_FLAG_STRUCT, \
857 SHARK_PD_DEVELOP_FLAG_STRUCT, \
858 SHARK_PRODUCT_FLAG_STRUCT, \
859 SHARK_PD_PRODUCT_FLAG_STRUCT, \
860 SHARK_DIAGNOSTIC_FLAG_STRUCT, \
861 SHARK_PD_DIAGNOSTIC_FLAG_STRUCT, \
862 SHARK_NOTPRODUCT_FLAG_STRUCT, \
863 IGNORE_RANGE, \
864 IGNORE_CONSTRAINT, \
865 IGNORE_WRITEABLE)
866 #endif // SHARK
867 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, \
868 ARCH_PRODUCT_FLAG_STRUCT, \
869 ARCH_DIAGNOSTIC_FLAG_STRUCT, \
870 ARCH_EXPERIMENTAL_FLAG_STRUCT, \
871 ARCH_NOTPRODUCT_FLAG_STRUCT, \
872 IGNORE_RANGE, \
873 IGNORE_CONSTRAINT, \
874 IGNORE_WRITEABLE)
875 FLAGTABLE_EXT
876 {0, NULL, NULL}
877 };
878
879 Flag* Flag::flags = flagTable;
880 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
881
882 inline bool str_equal(const char* s, const char* q, size_t len) {
883 // s is null terminated, q is not!
884 if (strlen(s) != (unsigned int) len) return false;
885 return strncmp(s, q, len) == 0;
886 }
887
888 // Search the flag table for a named flag
889 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
890 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
891 if (str_equal(current->_name, name, length)) {
892 // Found a matching entry.
893 // Don't report notproduct and develop flags in product builds.
894 if (current->is_constant_in_binary()) {
895 return (return_flag ? current : NULL);
896 }
897 // Report locked flags only if allowed.
898 if (!(current->is_unlocked() || current->is_unlocker())) {
899 if (!allow_locked) {
900 // disable use of locked flags, e.g. diagnostic, experimental,
901 // commercial... until they are explicitly unlocked
902 return NULL;
903 }
904 }
905 return current;
906 }
907 }
908 // Flag name is not in the flag table
909 return NULL;
910 }
911
912 // Compute string similarity based on Dice's coefficient
913 static float str_similar(const char* str1, const char* str2, size_t len2) {
914 int len1 = (int) strlen(str1);
915 int total = len1 + (int) len2;
916
917 int hit = 0;
918
919 for (int i = 0; i < len1 -1; ++i) {
920 for (int j = 0; j < (int) len2 -1; ++j) {
921 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
922 ++hit;
923 break;
924 }
925 }
926 }
927
928 return 2.0f * (float) hit / (float) total;
929 }
930
931 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
932 float VMOptionsFuzzyMatchSimilarity = 0.7f;
933 Flag* match = NULL;
934 float score;
935 float max_score = -1;
936
937 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
938 score = str_similar(current->_name, name, length);
939 if (score > max_score) {
940 max_score = score;
941 match = current;
942 }
943 }
944
945 if (!(match->is_unlocked() || match->is_unlocker())) {
946 if (!allow_locked) {
947 return NULL;
948 }
949 }
950
951 if (max_score < VMOptionsFuzzyMatchSimilarity) {
952 return NULL;
953 }
954
955 return match;
956 }
957
958 // Returns the address of the index'th element
959 static Flag* address_of_flag(CommandLineFlagWithType flag) {
960 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
961 return &Flag::flags[flag];
962 }
963
964 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
965 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
966 Flag* f = &Flag::flags[flag];
967 return f->is_default();
968 }
969
970 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
971 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
972 Flag* f = &Flag::flags[flag];
973 return f->is_ergonomic();
974 }
975
976 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
977 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
978 Flag* f = &Flag::flags[flag];
979 return f->is_command_line();
980 }
981
982 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
983 Flag* result = Flag::find_flag((char*)name, strlen(name));
984 if (result == NULL) return false;
985 *value = result->is_command_line();
986 return true;
987 }
988
989 void CommandLineFlagsEx::setOnCmdLine(CommandLineFlagWithType flag) {
990 Flag* faddr = address_of_flag(flag);
991 assert(faddr != NULL, "Unknown flag");
992 faddr->set_command_line();
993 }
994
995 template<class E, class T>
996 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin) {
997 E e;
998 e.set_name(name);
999 e.set_oldValue(old_value);
1000 e.set_newValue(new_value);
1001 e.set_origin(origin);
1002 e.commit();
1003 }
1004
1005 static Flag::Error apply_constraint_and_check_range_bool(const char* name, bool new_value, bool verbose) {
1006 Flag::Error status = Flag::SUCCESS;
1007 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1008 if (constraint != NULL) {
1009 status = constraint->apply_bool(new_value, verbose);
1010 }
1011 return status;
1012 }
1013
1014 Flag::Error CommandLineFlags::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) {
1015 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1016 if (result == NULL) return Flag::INVALID_FLAG;
1017 if (!result->is_bool()) return Flag::WRONG_FORMAT;
1018 *value = result->get_bool();
1019 return Flag::SUCCESS;
1020 }
1021
1022 Flag::Error CommandLineFlags::boolAtPut(Flag* flag, bool* value, Flag::Flags origin) {
1023 const char* name;
1024 if (flag == NULL) return Flag::INVALID_FLAG;
1025 if (!flag->is_bool()) return Flag::WRONG_FORMAT;
1026 name = flag->_name;
1027 Flag::Error check = apply_constraint_and_check_range_bool(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1028 if (check != Flag::SUCCESS) return check;
1029 bool old_value = flag->get_bool();
1030 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
1031 check = flag->set_bool(*value);
1032 *value = old_value;
1033 flag->set_origin(origin);
1034 return check;
1035 }
1036
1037 Flag::Error CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) {
1038 Flag* result = Flag::find_flag(name, len);
1039 return boolAtPut(result, value, origin);
1040 }
1041
1042 Flag::Error CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
1043 Flag* faddr = address_of_flag(flag);
1044 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
1045 return CommandLineFlags::boolAtPut(faddr, &value, origin);
1046 }
1047
1048 static Flag::Error apply_constraint_and_check_range_int(const char* name, int new_value, bool verbose) {
1049 Flag::Error status = Flag::SUCCESS;
1050 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1051 if (range != NULL) {
1052 status = range->check_int(new_value, verbose);
1053 }
1054 if (status == Flag::SUCCESS) {
1055 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1056 if (constraint != NULL) {
1057 status = constraint->apply_int(new_value, verbose);
1058 }
1059 }
1060 return status;
1061 }
1062
1063 Flag::Error CommandLineFlags::intAt(const char* name, size_t len, int* value, bool allow_locked, bool return_flag) {
1064 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1065 if (result == NULL) return Flag::INVALID_FLAG;
1066 if (!result->is_int()) return Flag::WRONG_FORMAT;
1067 *value = result->get_int();
1068 return Flag::SUCCESS;
1069 }
1070
1071 Flag::Error CommandLineFlags::intAtPut(Flag* flag, int* value, Flag::Flags origin) {
1072 const char* name;
1073 if (flag == NULL) return Flag::INVALID_FLAG;
1074 if (!flag->is_int()) return Flag::WRONG_FORMAT;
1075 name = flag->_name;
1076 Flag::Error check = apply_constraint_and_check_range_int(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1077 if (check != Flag::SUCCESS) return check;
1078 int old_value = flag->get_int();
1079 trace_flag_changed<EventIntFlagChanged, s4>(name, old_value, *value, origin);
1080 check = flag->set_int(*value);
1081 *value = old_value;
1082 flag->set_origin(origin);
1083 return check;
1084 }
1085
1086 Flag::Error CommandLineFlags::intAtPut(const char* name, size_t len, int* value, Flag::Flags origin) {
1087 Flag* result = Flag::find_flag(name, len);
1088 return intAtPut(result, value, origin);
1089 }
1090
1091 Flag::Error CommandLineFlagsEx::intAtPut(CommandLineFlagWithType flag, int value, Flag::Flags origin) {
1092 Flag* faddr = address_of_flag(flag);
1093 guarantee(faddr != NULL && faddr->is_int(), "wrong flag type");
1094 return CommandLineFlags::intAtPut(faddr, &value, origin);
1095 }
1096
1097 static Flag::Error apply_constraint_and_check_range_uint(const char* name, uint new_value, bool verbose) {
1098 Flag::Error status = Flag::SUCCESS;
1099 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1100 if (range != NULL) {
1101 status = range->check_uint(new_value, verbose);
1102 }
1103 if (status == Flag::SUCCESS) {
1104 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1105 if (constraint != NULL) {
1106 status = constraint->apply_uint(new_value, verbose);
1107 }
1108 }
1109 return status;
1110 }
1111
1112 Flag::Error CommandLineFlags::uintAt(const char* name, size_t len, uint* value, bool allow_locked, bool return_flag) {
1113 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1114 if (result == NULL) return Flag::INVALID_FLAG;
1115 if (!result->is_uint()) return Flag::WRONG_FORMAT;
1116 *value = result->get_uint();
1117 return Flag::SUCCESS;
1118 }
1119
1120 Flag::Error CommandLineFlags::uintAtPut(Flag* flag, uint* value, Flag::Flags origin) {
1121 const char* name;
1122 if (flag == NULL) return Flag::INVALID_FLAG;
1123 if (!flag->is_uint()) return Flag::WRONG_FORMAT;
1124 name = flag->_name;
1125 Flag::Error check = apply_constraint_and_check_range_uint(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1126 if (check != Flag::SUCCESS) return check;
1127 uint old_value = flag->get_uint();
1128 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(name, old_value, *value, origin);
1129 check = flag->set_uint(*value);
1130 *value = old_value;
1131 flag->set_origin(origin);
1132 return check;
1133 }
1134
1135 Flag::Error CommandLineFlags::uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin) {
1136 Flag* result = Flag::find_flag(name, len);
1137 return uintAtPut(result, value, origin);
1138 }
1139
1140 Flag::Error CommandLineFlagsEx::uintAtPut(CommandLineFlagWithType flag, uint value, Flag::Flags origin) {
1141 Flag* faddr = address_of_flag(flag);
1142 guarantee(faddr != NULL && faddr->is_uint(), "wrong flag type");
1143 return CommandLineFlags::uintAtPut(faddr, &value, origin);
1144 }
1145
1146 Flag::Error CommandLineFlags::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) {
1147 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1148 if (result == NULL) return Flag::INVALID_FLAG;
1149 if (!result->is_intx()) return Flag::WRONG_FORMAT;
1150 *value = result->get_intx();
1151 return Flag::SUCCESS;
1152 }
1153
1154 static Flag::Error apply_constraint_and_check_range_intx(const char* name, intx new_value, bool verbose) {
1155 Flag::Error status = Flag::SUCCESS;
1156 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1157 if (range != NULL) {
1158 status = range->check_intx(new_value, verbose);
1159 }
1160 if (status == Flag::SUCCESS) {
1161 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1162 if (constraint != NULL) {
1163 status = constraint->apply_intx(new_value, verbose);
1164 }
1165 }
1166 return status;
1167 }
1168
1169 Flag::Error CommandLineFlags::intxAtPut(Flag* flag, intx* value, Flag::Flags origin) {
1170 const char* name;
1171 if (flag == NULL) return Flag::INVALID_FLAG;
1172 if (!flag->is_intx()) return Flag::WRONG_FORMAT;
1173 name = flag->_name;
1174 Flag::Error check = apply_constraint_and_check_range_intx(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1175 if (check != Flag::SUCCESS) return check;
1176 intx old_value = flag->get_intx();
1177 trace_flag_changed<EventLongFlagChanged, intx>(name, old_value, *value, origin);
1178 check = flag->set_intx(*value);
1179 *value = old_value;
1180 flag->set_origin(origin);
1181 return check;
1182 }
1183
1184 Flag::Error CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) {
1185 Flag* result = Flag::find_flag(name, len);
1186 return intxAtPut(result, value, origin);
1187 }
1188
1189 Flag::Error CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
1190 Flag* faddr = address_of_flag(flag);
1191 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
1192 return CommandLineFlags::intxAtPut(faddr, &value, origin);
1193 }
1194
1195 Flag::Error CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
1196 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1197 if (result == NULL) return Flag::INVALID_FLAG;
1198 if (!result->is_uintx()) return Flag::WRONG_FORMAT;
1199 *value = result->get_uintx();
1200 return Flag::SUCCESS;
1201 }
1202
1203 static Flag::Error apply_constraint_and_check_range_uintx(const char* name, uintx new_value, bool verbose) {
1204 Flag::Error status = Flag::SUCCESS;
1205 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1206 if (range != NULL) {
1207 status = range->check_uintx(new_value, verbose);
1208 }
1209 if (status == Flag::SUCCESS) {
1210 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1211 if (constraint != NULL) {
1212 status = constraint->apply_uintx(new_value, verbose);
1213 }
1214 }
1215 return status;
1216 }
1217
1218 Flag::Error CommandLineFlags::uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin) {
1219 const char* name;
1220 if (flag == NULL) return Flag::INVALID_FLAG;
1221 if (!flag->is_uintx()) return Flag::WRONG_FORMAT;
1222 name = flag->_name;
1223 Flag::Error check = apply_constraint_and_check_range_uintx(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1224 if (check != Flag::SUCCESS) return check;
1225 uintx old_value = flag->get_uintx();
1226 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1227 check = flag->set_uintx(*value);
1228 *value = old_value;
1229 flag->set_origin(origin);
1230 return check;
1231 }
1232
1233 Flag::Error CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) {
1234 Flag* result = Flag::find_flag(name, len);
1235 return uintxAtPut(result, value, origin);
1236 }
1237
1238 Flag::Error CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
1239 Flag* faddr = address_of_flag(flag);
1240 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
1241 return CommandLineFlags::uintxAtPut(faddr, &value, origin);
1242 }
1243
1244 Flag::Error CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) {
1245 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1246 if (result == NULL) return Flag::INVALID_FLAG;
1247 if (!result->is_uint64_t()) return Flag::WRONG_FORMAT;
1248 *value = result->get_uint64_t();
1249 return Flag::SUCCESS;
1250 }
1251
1252 static Flag::Error apply_constraint_and_check_range_uint64_t(const char* name, uint64_t new_value, bool verbose) {
1253 Flag::Error status = Flag::SUCCESS;
1254 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1255 if (range != NULL) {
1256 status = range->check_uint64_t(new_value, verbose);
1257 }
1258 if (status == Flag::SUCCESS) {
1259 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1260 if (constraint != NULL) {
1261 status = constraint->apply_uint64_t(new_value, verbose);
1262 }
1263 }
1264 return status;
1265 }
1266
1267 Flag::Error CommandLineFlags::uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin) {
1268 const char* name;
1269 if (flag == NULL) return Flag::INVALID_FLAG;
1270 if (!flag->is_uint64_t()) return Flag::WRONG_FORMAT;
1271 name = flag->_name;
1272 Flag::Error check = apply_constraint_and_check_range_uint64_t(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1273 if (check != Flag::SUCCESS) return check;
1274 uint64_t old_value = flag->get_uint64_t();
1275 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1276 check = flag->set_uint64_t(*value);
1277 *value = old_value;
1278 flag->set_origin(origin);
1279 return check;
1280 }
1281
1282 Flag::Error CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) {
1283 Flag* result = Flag::find_flag(name, len);
1284 return uint64_tAtPut(result, value, origin);
1285 }
1286
1287 Flag::Error CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
1288 Flag* faddr = address_of_flag(flag);
1289 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
1290 return CommandLineFlags::uint64_tAtPut(faddr, &value, origin);
1291 }
1292
1293 Flag::Error CommandLineFlags::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) {
1294 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1295 if (result == NULL) return Flag::INVALID_FLAG;
1296 if (!result->is_size_t()) return Flag::WRONG_FORMAT;
1297 *value = result->get_size_t();
1298 return Flag::SUCCESS;
1299 }
1300
1301 static Flag::Error apply_constraint_and_check_range_size_t(const char* name, size_t new_value, bool verbose) {
1302 Flag::Error status = Flag::SUCCESS;
1303 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1304 if (range != NULL) {
1305 status = range->check_size_t(new_value, verbose);
1306 }
1307 if (status == Flag::SUCCESS) {
1308 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1309 if (constraint != NULL) {
1310 status = constraint->apply_size_t(new_value, verbose);
1311 }
1312 }
1313 return status;
1314 }
1315
1316
1317 Flag::Error CommandLineFlags::size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin) {
1318 const char* name;
1319 if (flag == NULL) return Flag::INVALID_FLAG;
1320 if (!flag->is_size_t()) return Flag::WRONG_FORMAT;
1321 name = flag->_name;
1322 Flag::Error check = apply_constraint_and_check_range_size_t(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1323 if (check != Flag::SUCCESS) return check;
1324 size_t old_value = flag->get_size_t();
1325 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1326 check = flag->set_size_t(*value);
1327 *value = old_value;
1328 flag->set_origin(origin);
1329 return check;
1330 }
1331
1332 Flag::Error CommandLineFlags::size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin) {
1333 Flag* result = Flag::find_flag(name, len);
1334 return size_tAtPut(result, value, origin);
1335 }
1336
1337 Flag::Error CommandLineFlagsEx::size_tAtPut(CommandLineFlagWithType flag, size_t value, Flag::Flags origin) {
1338 Flag* faddr = address_of_flag(flag);
1339 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type");
1340 return CommandLineFlags::size_tAtPut(faddr, &value, origin);
1341 }
1342
1343 Flag::Error CommandLineFlags::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) {
1344 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1345 if (result == NULL) return Flag::INVALID_FLAG;
1346 if (!result->is_double()) return Flag::WRONG_FORMAT;
1347 *value = result->get_double();
1348 return Flag::SUCCESS;
1349 }
1350
1351 static Flag::Error apply_constraint_and_check_range_double(const char* name, double new_value, bool verbose) {
1352 Flag::Error status = Flag::SUCCESS;
1353 CommandLineFlagRange* range = CommandLineFlagRangeList::find(name);
1354 if (range != NULL) {
1355 status = range->check_double(new_value, verbose);
1356 }
1357 if (status == Flag::SUCCESS) {
1358 CommandLineFlagConstraint* constraint = CommandLineFlagConstraintList::find_if_needs_check(name);
1359 if (constraint != NULL) {
1360 status = constraint->apply_double(new_value, verbose);
1361 }
1362 }
1363 return status;
1364 }
1365
1366 Flag::Error CommandLineFlags::doubleAtPut(Flag* flag, double* value, Flag::Flags origin) {
1367 const char* name;
1368 if (flag == NULL) return Flag::INVALID_FLAG;
1369 if (!flag->is_double()) return Flag::WRONG_FORMAT;
1370 name = flag->_name;
1371 Flag::Error check = apply_constraint_and_check_range_double(name, *value, !CommandLineFlagConstraintList::validated_after_ergo());
1372 if (check != Flag::SUCCESS) return check;
1373 double old_value = flag->get_double();
1374 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
1375 check = flag->set_double(*value);
1376 *value = old_value;
1377 flag->set_origin(origin);
1378 return check;
1379 }
1380
1381 Flag::Error CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) {
1382 Flag* result = Flag::find_flag(name, len);
1383 return doubleAtPut(result, value, origin);
1384 }
1385
1386 Flag::Error CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
1387 Flag* faddr = address_of_flag(flag);
1388 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
1389 return CommandLineFlags::doubleAtPut(faddr, &value, origin);
1390 }
1391
1392 Flag::Error CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) {
1393 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
1394 if (result == NULL) return Flag::INVALID_FLAG;
1395 if (!result->is_ccstr()) return Flag::WRONG_FORMAT;
1396 *value = result->get_ccstr();
1397 return Flag::SUCCESS;
1398 }
1399
1400 Flag::Error CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
1401 Flag* result = Flag::find_flag(name, len);
1402 if (result == NULL) return Flag::INVALID_FLAG;
1403 if (!result->is_ccstr()) return Flag::WRONG_FORMAT;
1404 ccstr old_value = result->get_ccstr();
1405 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
1406 char* new_value = NULL;
1407 if (*value != NULL) {
1408 new_value = os::strdup_check_oom(*value);
1409 }
1410 Flag::Error check = result->set_ccstr(new_value);
1411 if (result->is_default() && old_value != NULL) {
1412 // Prior value is NOT heap allocated, but was a literal constant.
1413 old_value = os::strdup_check_oom(old_value);
1414 }
1415 *value = old_value;
1416 result->set_origin(origin);
1417 return check;
1418 }
1419
1420 Flag::Error CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
1421 Flag* faddr = address_of_flag(flag);
1422 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
1423 ccstr old_value = faddr->get_ccstr();
1424 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
1425 char* new_value = os::strdup_check_oom(value);
1426 Flag::Error check = faddr->set_ccstr(new_value);
1427 if (!faddr->is_default() && old_value != NULL) {
1428 // Prior value is heap allocated so free it.
1429 FREE_C_HEAP_ARRAY(char, old_value);
1430 }
1431 faddr->set_origin(origin);
1432 return check;
1433 }
1434
1435 extern "C" {
1436 static int compare_flags(const void* void_a, const void* void_b) {
1437 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
1438 }
1439 }
1440
1441 void CommandLineFlags::printSetFlags(outputStream* out) {
1442 // Print which flags were set on the command line
1443 // note: this method is called before the thread structure is in place
1444 // which means resource allocation cannot be used.
1445
1446 // The last entry is the null entry.
1447 const size_t length = Flag::numFlags - 1;
1448
1449 // Sort
1450 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtArguments);
1451 for (size_t i = 0; i < length; i++) {
1452 array[i] = &flagTable[i];
1453 }
1454 qsort(array, length, sizeof(Flag*), compare_flags);
1455
1456 // Print
1457 for (size_t i = 0; i < length; i++) {
1458 if (array[i]->get_origin() /* naked field! */) {
1459 array[i]->print_as_flag(out);
1460 out->print(" ");
1461 }
1462 }
1463 out->cr();
1464 FREE_C_HEAP_ARRAY(Flag*, array);
1465 }
1466
1467 #ifndef PRODUCT
1468
1469 void CommandLineFlags::verify() {
1470 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
1471 }
1472
1473 #endif // PRODUCT
1474
1475 void CommandLineFlags::printFlags(outputStream* out, bool withComments, bool printRanges) {
1476 // Print the flags sorted by name
1477 // note: this method is called before the thread structure is in place
1478 // which means resource allocation cannot be used.
1479
1480 // The last entry is the null entry.
1481 const size_t length = Flag::numFlags - 1;
1482
1483 // Sort
1484 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtArguments);
1485 for (size_t i = 0; i < length; i++) {
1486 array[i] = &flagTable[i];
1487 }
1488 qsort(array, length, sizeof(Flag*), compare_flags);
1489
1490 // Print
1491 if (!printRanges) {
1492 out->print_cr("[Global flags]");
1493 } else {
1494 out->print_cr("[Global flags ranges]");
1495 }
1496
1497 for (size_t i = 0; i < length; i++) {
1498 if (array[i]->is_unlocked()) {
1499 array[i]->print_on(out, withComments, printRanges);
1500 }
1501 }
1502 FREE_C_HEAP_ARRAY(Flag*, array);
1503 }