1 /*
2 * Copyright (c) 1997, 2018, 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 "runtime/arguments.hpp"
28 #include "runtime/flags/jvmFlag.hpp"
29 #include "runtime/flags/jvmFlagConstraintList.hpp"
30 #include "runtime/flags/jvmFlagWriteableList.hpp"
31 #include "runtime/flags/jvmFlagRangeList.hpp"
32 #include "runtime/globals_extension.hpp"
33 #include "trace/tracing.hpp"
34 #include "utilities/defaultStream.hpp"
35 #include "utilities/stringUtils.hpp"
36
37 #define DEFAULT_RANGE_STR_CHUNK_SIZE 64
38 static char* create_range_str(const char *fmt, ...) {
39 static size_t string_length = DEFAULT_RANGE_STR_CHUNK_SIZE;
40 static char* range_string = NEW_C_HEAP_ARRAY(char, string_length, mtLogging);
41
42 int size_needed = 0;
43 do {
44 va_list args;
45 va_start(args, fmt);
46 size_needed = jio_vsnprintf(range_string, string_length, fmt, args);
47 va_end(args);
48
49 if (size_needed < 0) {
50 string_length += DEFAULT_RANGE_STR_CHUNK_SIZE;
51 range_string = REALLOC_C_HEAP_ARRAY(char, range_string, string_length, mtLogging);
52 guarantee(range_string != NULL, "create_range_str string should not be NULL");
53 }
54 } while (size_needed < 0);
55
56 return range_string;
57 }
58
59 const char* JVMFlag::get_int_default_range_str() {
60 return create_range_str("[ " INT32_FORMAT_W(-25) " ... " INT32_FORMAT_W(25) " ]", INT_MIN, INT_MAX);
61 }
62
63 const char* JVMFlag::get_uint_default_range_str() {
64 return create_range_str("[ " UINT32_FORMAT_W(-25) " ... " UINT32_FORMAT_W(25) " ]", 0, UINT_MAX);
65 }
66
67 const char* JVMFlag::get_intx_default_range_str() {
68 return create_range_str("[ " INTX_FORMAT_W(-25) " ... " INTX_FORMAT_W(25) " ]", min_intx, max_intx);
69 }
70
71 const char* JVMFlag::get_uintx_default_range_str() {
72 return create_range_str("[ " UINTX_FORMAT_W(-25) " ... " UINTX_FORMAT_W(25) " ]", 0, max_uintx);
73 }
74
75 const char* JVMFlag::get_uint64_t_default_range_str() {
76 return create_range_str("[ " UINT64_FORMAT_W(-25) " ... " UINT64_FORMAT_W(25) " ]", 0, uint64_t(max_juint));
77 }
78
79 const char* JVMFlag::get_size_t_default_range_str() {
80 return create_range_str("[ " SIZE_FORMAT_W(-25) " ... " SIZE_FORMAT_W(25) " ]", 0, SIZE_MAX);
81 }
82
83 const char* JVMFlag::get_double_default_range_str() {
84 return create_range_str("[ %-25.3f ... %25.3f ]", DBL_MIN, DBL_MAX);
85 }
86
87 static bool is_product_build() {
88 #ifdef PRODUCT
89 return true;
90 #else
91 return false;
92 #endif
93 }
94
95 JVMFlag::Error JVMFlag::check_writable(bool changed) {
96 if (is_constant_in_binary()) {
97 fatal("flag is constant: %s", _name);
98 }
99
100 JVMFlag::Error error = JVMFlag::SUCCESS;
101 if (changed) {
102 JVMFlagWriteable* writeable = JVMFlagWriteableList::find(_name);
103 if (writeable) {
104 if (writeable->is_writeable() == false) {
105 switch (writeable->type())
106 {
107 case JVMFlagWriteable::Once:
108 error = JVMFlag::SET_ONLY_ONCE;
109 jio_fprintf(defaultStream::error_stream(), "Error: %s may not be set more than once\n", _name);
110 break;
111 case JVMFlagWriteable::CommandLineOnly:
112 error = JVMFlag::COMMAND_LINE_ONLY;
113 jio_fprintf(defaultStream::error_stream(), "Error: %s may be modified only from commad line\n", _name);
114 break;
115 default:
116 ShouldNotReachHere();
117 break;
118 }
119 }
120 writeable->mark_once();
121 }
122 }
123 return error;
124 }
125
126 bool JVMFlag::is_bool() const {
127 return strcmp(_type, "bool") == 0;
128 }
129
130 bool JVMFlag::get_bool() const {
131 return *((bool*) _addr);
132 }
133
134 JVMFlag::Error JVMFlag::set_bool(bool value) {
135 JVMFlag::Error error = check_writable(value!=get_bool());
136 if (error == JVMFlag::SUCCESS) {
137 *((bool*) _addr) = value;
138 }
139 return error;
140 }
141
142 bool JVMFlag::is_int() const {
143 return strcmp(_type, "int") == 0;
144 }
145
146 int JVMFlag::get_int() const {
147 return *((int*) _addr);
148 }
149
150 JVMFlag::Error JVMFlag::set_int(int value) {
151 JVMFlag::Error error = check_writable(value!=get_int());
152 if (error == JVMFlag::SUCCESS) {
153 *((int*) _addr) = value;
154 }
155 return error;
156 }
157
158 bool JVMFlag::is_uint() const {
159 return strcmp(_type, "uint") == 0;
160 }
161
162 uint JVMFlag::get_uint() const {
163 return *((uint*) _addr);
164 }
165
166 JVMFlag::Error JVMFlag::set_uint(uint value) {
167 JVMFlag::Error error = check_writable(value!=get_uint());
168 if (error == JVMFlag::SUCCESS) {
169 *((uint*) _addr) = value;
170 }
171 return error;
172 }
173
174 bool JVMFlag::is_intx() const {
175 return strcmp(_type, "intx") == 0;
176 }
177
178 intx JVMFlag::get_intx() const {
179 return *((intx*) _addr);
180 }
181
182 JVMFlag::Error JVMFlag::set_intx(intx value) {
183 JVMFlag::Error error = check_writable(value!=get_intx());
184 if (error == JVMFlag::SUCCESS) {
185 *((intx*) _addr) = value;
186 }
187 return error;
188 }
189
190 bool JVMFlag::is_uintx() const {
191 return strcmp(_type, "uintx") == 0;
192 }
193
194 uintx JVMFlag::get_uintx() const {
195 return *((uintx*) _addr);
196 }
197
198 JVMFlag::Error JVMFlag::set_uintx(uintx value) {
199 JVMFlag::Error error = check_writable(value!=get_uintx());
200 if (error == JVMFlag::SUCCESS) {
201 *((uintx*) _addr) = value;
202 }
203 return error;
204 }
205
206 bool JVMFlag::is_uint64_t() const {
207 return strcmp(_type, "uint64_t") == 0;
208 }
209
210 uint64_t JVMFlag::get_uint64_t() const {
211 return *((uint64_t*) _addr);
212 }
213
214 JVMFlag::Error JVMFlag::set_uint64_t(uint64_t value) {
215 JVMFlag::Error error = check_writable(value!=get_uint64_t());
216 if (error == JVMFlag::SUCCESS) {
217 *((uint64_t*) _addr) = value;
218 }
219 return error;
220 }
221
222 bool JVMFlag::is_size_t() const {
223 return strcmp(_type, "size_t") == 0;
224 }
225
226 size_t JVMFlag::get_size_t() const {
227 return *((size_t*) _addr);
228 }
229
230 JVMFlag::Error JVMFlag::set_size_t(size_t value) {
231 JVMFlag::Error error = check_writable(value!=get_size_t());
232 if (error == JVMFlag::SUCCESS) {
233 *((size_t*) _addr) = value;
234 }
235 return error;
236 }
237
238 bool JVMFlag::is_double() const {
239 return strcmp(_type, "double") == 0;
240 }
241
242 double JVMFlag::get_double() const {
243 return *((double*) _addr);
244 }
245
246 JVMFlag::Error JVMFlag::set_double(double value) {
247 JVMFlag::Error error = check_writable(value!=get_double());
248 if (error == JVMFlag::SUCCESS) {
249 *((double*) _addr) = value;
250 }
251 return error;
252 }
253
254 bool JVMFlag::is_ccstr() const {
255 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
256 }
257
258 bool JVMFlag::ccstr_accumulates() const {
259 return strcmp(_type, "ccstrlist") == 0;
260 }
261
262 ccstr JVMFlag::get_ccstr() const {
263 return *((ccstr*) _addr);
264 }
265
266 JVMFlag::Error JVMFlag::set_ccstr(ccstr value) {
267 JVMFlag::Error error = check_writable(value!=get_ccstr());
268 if (error == JVMFlag::SUCCESS) {
269 *((ccstr*) _addr) = value;
270 }
271 return error;
272 }
273
274
275 JVMFlag::Flags JVMFlag::get_origin() {
276 return Flags(_flags & VALUE_ORIGIN_MASK);
277 }
278
279 void JVMFlag::set_origin(Flags origin) {
280 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
281 Flags new_origin = Flags((origin == COMMAND_LINE) ? Flags(origin | ORIG_COMMAND_LINE) : origin);
282 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | new_origin);
283 }
284
285 bool JVMFlag::is_default() {
286 return (get_origin() == DEFAULT);
287 }
288
289 bool JVMFlag::is_ergonomic() {
290 return (get_origin() == ERGONOMIC);
291 }
292
293 bool JVMFlag::is_command_line() {
294 return (_flags & ORIG_COMMAND_LINE) != 0;
295 }
296
297 void JVMFlag::set_command_line() {
298 _flags = Flags(_flags | ORIG_COMMAND_LINE);
299 }
300
301 bool JVMFlag::is_product() const {
302 return (_flags & KIND_PRODUCT) != 0;
303 }
304
305 bool JVMFlag::is_manageable() const {
306 return (_flags & KIND_MANAGEABLE) != 0;
307 }
308
309 bool JVMFlag::is_diagnostic() const {
310 return (_flags & KIND_DIAGNOSTIC) != 0;
311 }
312
313 bool JVMFlag::is_experimental() const {
314 return (_flags & KIND_EXPERIMENTAL) != 0;
315 }
316
317 bool JVMFlag::is_notproduct() const {
318 return (_flags & KIND_NOT_PRODUCT) != 0;
319 }
320
321 bool JVMFlag::is_develop() const {
322 return (_flags & KIND_DEVELOP) != 0;
323 }
324
325 bool JVMFlag::is_read_write() const {
326 return (_flags & KIND_READ_WRITE) != 0;
327 }
328
329 bool JVMFlag::is_commercial() const {
330 return (_flags & KIND_COMMERCIAL) != 0;
331 }
332
333 /**
334 * Returns if this flag is a constant in the binary. Right now this is
335 * true for notproduct and develop flags in product builds.
336 */
337 bool JVMFlag::is_constant_in_binary() const {
338 #ifdef PRODUCT
339 return is_notproduct() || is_develop();
340 #else
341 return false;
342 #endif
343 }
344
345 bool JVMFlag::is_unlocker() const {
346 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
347 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
348 is_unlocker_ext();
349 }
350
351 bool JVMFlag::is_unlocked() const {
352 if (is_diagnostic()) {
353 return UnlockDiagnosticVMOptions;
354 }
355 if (is_experimental()) {
356 return UnlockExperimentalVMOptions;
357 }
358 return is_unlocked_ext();
359 }
360
361 void JVMFlag::clear_diagnostic() {
362 assert(is_diagnostic(), "sanity");
363 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
364 assert(!is_diagnostic(), "sanity");
365 }
366
367 // Get custom message for this locked flag, or NULL if
368 // none is available. Returns message type produced.
369 JVMFlag::MsgType JVMFlag::get_locked_message(char* buf, int buflen) const {
370 buf[0] = '\0';
371 if (is_diagnostic() && !is_unlocked()) {
372 jio_snprintf(buf, buflen,
373 "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n"
374 "Error: The unlock option must precede '%s'.\n",
375 _name, _name);
376 return JVMFlag::DIAGNOSTIC_FLAG_BUT_LOCKED;
377 }
378 if (is_experimental() && !is_unlocked()) {
379 jio_snprintf(buf, buflen,
380 "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n"
381 "Error: The unlock option must precede '%s'.\n",
382 _name, _name);
383 return JVMFlag::EXPERIMENTAL_FLAG_BUT_LOCKED;
384 }
385 if (is_develop() && is_product_build()) {
386 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
387 _name);
388 return JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD;
389 }
390 if (is_notproduct() && is_product_build()) {
391 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
392 _name);
393 return JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD;
394 }
395 return get_locked_message_ext(buf, buflen);
396 }
397
398 bool JVMFlag::is_writeable() const {
399 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
400 }
401
402 // All flags except "manageable" are assumed to be internal flags.
403 // Long term, we need to define a mechanism to specify which flags
404 // are external/stable and change this function accordingly.
405 bool JVMFlag::is_external() const {
406 return is_manageable() || is_external_ext();
407 }
408
409 // Helper function for JVMFlag::print_on().
410 // Fills current line up to requested position.
411 // Should the current position already be past the requested position,
412 // one separator blank is enforced.
413 void fill_to_pos(outputStream* st, unsigned int req_pos) {
414 if ((unsigned int)st->position() < req_pos) {
415 st->fill_to(req_pos); // need to fill with blanks to reach req_pos
416 } else {
417 st->print(" "); // enforce blank separation. Previous field too long.
418 }
419 }
420
421 void JVMFlag::print_on(outputStream* st, bool withComments, bool printRanges) {
422 // Don't print notproduct and develop flags in a product build.
423 if (is_constant_in_binary()) {
424 return;
425 }
426
427 if (!printRanges) {
428 // The command line options -XX:+PrintFlags* cause this function to be called
429 // for each existing flag to print information pertinent to this flag. The data
430 // is displayed in columnar form, with the following layout:
431 // col1 - data type, right-justified
432 // col2 - name, left-justified
433 // col3 - ' =' double-char, leading space to align with possible '+='
434 // col4 - value left-justified
435 // col5 - kind right-justified
436 // col6 - origin left-justified
437 // col7 - comments left-justified
438 //
439 // The column widths are fixed. They are defined such that, for most cases,
440 // an eye-pleasing tabular output is created.
441 //
442 // Sample output:
443 // bool CMSScavengeBeforeRemark = false {product} {default}
444 // uintx CMSScheduleRemarkEdenPenetration = 50 {product} {default}
445 // size_t CMSScheduleRemarkEdenSizeThreshold = 2097152 {product} {default}
446 // uintx CMSScheduleRemarkSamplingRatio = 5 {product} {default}
447 // double CMSSmallCoalSurplusPercent = 1.050000 {product} {default}
448 // ccstr CompileCommandFile = MyFile.cmd {product} {command line}
449 // ccstrlist CompileOnly = Method1
450 // CompileOnly += Method2 {product} {command line}
451 // | | | | | | |
452 // | | | | | | +-- col7
453 // | | | | | +-- col6
454 // | | | | +-- col5
455 // | | | +-- col4
456 // | | +-- col3
457 // | +-- col2
458 // +-- col1
459
460 const unsigned int col_spacing = 1;
461 const unsigned int col1_pos = 0;
462 const unsigned int col1_width = 9;
463 const unsigned int col2_pos = col1_pos + col1_width + col_spacing;
464 const unsigned int col2_width = 39;
465 const unsigned int col3_pos = col2_pos + col2_width + col_spacing;
466 const unsigned int col3_width = 2;
467 const unsigned int col4_pos = col3_pos + col3_width + col_spacing;
468 const unsigned int col4_width = 30;
469 const unsigned int col5_pos = col4_pos + col4_width + col_spacing;
470 const unsigned int col5_width = 20;
471 const unsigned int col6_pos = col5_pos + col5_width + col_spacing;
472 const unsigned int col6_width = 15;
473 const unsigned int col7_pos = col6_pos + col6_width + col_spacing;
474 const unsigned int col7_width = 1;
475
476 st->fill_to(col1_pos);
477 st->print("%*s", col1_width, _type); // right-justified, therefore width is required.
478
479 fill_to_pos(st, col2_pos);
480 st->print("%s", _name);
481
482 fill_to_pos(st, col3_pos);
483 st->print(" ="); // use " =" for proper alignment with multiline ccstr output.
484
485 fill_to_pos(st, col4_pos);
486 if (is_bool()) {
487 st->print("%s", get_bool() ? "true" : "false");
488 } else if (is_int()) {
489 st->print("%d", get_int());
490 } else if (is_uint()) {
491 st->print("%u", get_uint());
492 } else if (is_intx()) {
493 st->print(INTX_FORMAT, get_intx());
494 } else if (is_uintx()) {
495 st->print(UINTX_FORMAT, get_uintx());
496 } else if (is_uint64_t()) {
497 st->print(UINT64_FORMAT, get_uint64_t());
498 } else if (is_size_t()) {
499 st->print(SIZE_FORMAT, get_size_t());
500 } else if (is_double()) {
501 st->print("%f", get_double());
502 } else if (is_ccstr()) {
503 // Honor <newline> characters in ccstr: print multiple lines.
504 const char* cp = get_ccstr();
505 if (cp != NULL) {
506 const char* eol;
507 while ((eol = strchr(cp, '\n')) != NULL) {
508 size_t llen = pointer_delta(eol, cp, sizeof(char));
509 st->print("%.*s", (int)llen, cp);
510 st->cr();
511 cp = eol+1;
512 fill_to_pos(st, col2_pos);
513 st->print("%s", _name);
514 fill_to_pos(st, col3_pos);
515 st->print("+=");
516 fill_to_pos(st, col4_pos);
517 }
518 st->print("%s", cp);
519 }
520 } else {
521 st->print("unhandled type %s", _type);
522 st->cr();
523 return;
524 }
525
526 fill_to_pos(st, col5_pos);
527 print_kind(st, col5_width);
528
529 fill_to_pos(st, col6_pos);
530 print_origin(st, col6_width);
531
532 #ifndef PRODUCT
533 if (withComments) {
534 fill_to_pos(st, col7_pos);
535 st->print("%s", _doc);
536 }
537 #endif
538 st->cr();
539 } else if (!is_bool() && !is_ccstr()) {
540 // The command line options -XX:+PrintFlags* cause this function to be called
541 // for each existing flag to print information pertinent to this flag. The data
542 // is displayed in columnar form, with the following layout:
543 // col1 - data type, right-justified
544 // col2 - name, left-justified
545 // col4 - range [ min ... max]
546 // col5 - kind right-justified
547 // col6 - origin left-justified
548 // col7 - comments left-justified
549 //
550 // The column widths are fixed. They are defined such that, for most cases,
551 // an eye-pleasing tabular output is created.
552 //
553 // Sample output:
554 // intx MinPassesBeforeFlush [ 0 ... 9223372036854775807 ] {diagnostic} {default}
555 // uintx MinRAMFraction [ 1 ... 18446744073709551615 ] {product} {default}
556 // double MinRAMPercentage [ 0.000 ... 100.000 ] {product} {default}
557 // uintx MinSurvivorRatio [ 3 ... 18446744073709551615 ] {product} {default}
558 // size_t MinTLABSize [ 1 ... 9223372036854775807 ] {product} {default}
559 // intx MonitorBound [ 0 ... 2147483647 ] {product} {default}
560 // | | | | | |
561 // | | | | | +-- col7
562 // | | | | +-- col6
563 // | | | +-- col5
564 // | | +-- col4
565 // | +-- col2
566 // +-- col1
567
568 const unsigned int col_spacing = 1;
569 const unsigned int col1_pos = 0;
570 const unsigned int col1_width = 9;
571 const unsigned int col2_pos = col1_pos + col1_width + col_spacing;
572 const unsigned int col2_width = 49;
573 const unsigned int col3_pos = col2_pos + col2_width + col_spacing;
574 const unsigned int col3_width = 0;
575 const unsigned int col4_pos = col3_pos + col3_width + col_spacing;
576 const unsigned int col4_width = 60;
577 const unsigned int col5_pos = col4_pos + col4_width + col_spacing;
578 const unsigned int col5_width = 35;
579 const unsigned int col6_pos = col5_pos + col5_width + col_spacing;
580 const unsigned int col6_width = 15;
581 const unsigned int col7_pos = col6_pos + col6_width + col_spacing;
582 const unsigned int col7_width = 1;
583
584 st->fill_to(col1_pos);
585 st->print("%*s", col1_width, _type); // right-justified, therefore width is required.
586
587 fill_to_pos(st, col2_pos);
588 st->print("%s", _name);
589
590 fill_to_pos(st, col4_pos);
591 RangeStrFunc func = NULL;
592 if (is_int()) {
593 func = JVMFlag::get_int_default_range_str;
594 } else if (is_uint()) {
595 func = JVMFlag::get_uint_default_range_str;
596 } else if (is_intx()) {
597 func = JVMFlag::get_intx_default_range_str;
598 } else if (is_uintx()) {
599 func = JVMFlag::get_uintx_default_range_str;
600 } else if (is_uint64_t()) {
601 func = JVMFlag::get_uint64_t_default_range_str;
602 } else if (is_size_t()) {
603 func = JVMFlag::get_size_t_default_range_str;
604 } else if (is_double()) {
605 func = JVMFlag::get_double_default_range_str;
606 } else {
607 st->print("unhandled type %s", _type);
608 st->cr();
609 return;
610 }
611 JVMFlagRangeList::print(st, _name, func);
612
613 fill_to_pos(st, col5_pos);
614 print_kind(st, col5_width);
615
616 fill_to_pos(st, col6_pos);
617 print_origin(st, col6_width);
618
619 #ifndef PRODUCT
620 if (withComments) {
621 fill_to_pos(st, col7_pos);
622 st->print("%s", _doc);
623 }
624 #endif
625 st->cr();
626 }
627 }
628
629 void JVMFlag::print_kind(outputStream* st, unsigned int width) {
630 struct Data {
631 int flag;
632 const char* name;
633 };
634
635 Data data[] = {
636 { KIND_JVMCI, "JVMCI" },
637 { KIND_C1, "C1" },
638 { KIND_C2, "C2" },
639 { KIND_ARCH, "ARCH" },
640 { KIND_PLATFORM_DEPENDENT, "pd" },
641 { KIND_PRODUCT, "product" },
642 { KIND_MANAGEABLE, "manageable" },
643 { KIND_DIAGNOSTIC, "diagnostic" },
644 { KIND_EXPERIMENTAL, "experimental" },
645 { KIND_COMMERCIAL, "commercial" },
646 { KIND_NOT_PRODUCT, "notproduct" },
647 { KIND_DEVELOP, "develop" },
648 { KIND_LP64_PRODUCT, "lp64_product" },
649 { KIND_READ_WRITE, "rw" },
650 { -1, "" }
651 };
652
653 if ((_flags & KIND_MASK) != 0) {
654 bool is_first = true;
655 const size_t buffer_size = 64;
656 size_t buffer_used = 0;
657 char kind[buffer_size];
658
659 jio_snprintf(kind, buffer_size, "{");
660 buffer_used++;
661 for (int i = 0; data[i].flag != -1; i++) {
662 Data d = data[i];
663 if ((_flags & d.flag) != 0) {
664 if (is_first) {
665 is_first = false;
666 } else {
667 assert(buffer_used + 1 < buffer_size, "Too small buffer");
668 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, " ");
669 buffer_used++;
670 }
671 size_t length = strlen(d.name);
672 assert(buffer_used + length < buffer_size, "Too small buffer");
673 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "%s", d.name);
674 buffer_used += length;
675 }
676 }
677 assert(buffer_used + 2 <= buffer_size, "Too small buffer");
678 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "}");
679 st->print("%*s", width, kind);
680 }
681 }
682
683 void JVMFlag::print_origin(outputStream* st, unsigned int width) {
684 int origin = _flags & VALUE_ORIGIN_MASK;
685 st->print("{");
686 switch(origin) {
687 case DEFAULT:
688 st->print("default"); break;
689 case COMMAND_LINE:
690 st->print("command line"); break;
691 case ENVIRON_VAR:
692 st->print("environment"); break;
693 case CONFIG_FILE:
694 st->print("config file"); break;
695 case MANAGEMENT:
696 st->print("management"); break;
697 case ERGONOMIC:
698 if (_flags & ORIG_COMMAND_LINE) {
699 st->print("command line, ");
700 }
701 st->print("ergonomic"); break;
702 case ATTACH_ON_DEMAND:
703 st->print("attach"); break;
704 case INTERNAL:
705 st->print("internal"); break;
706 }
707 st->print("}");
708 }
709
710 void JVMFlag::print_as_flag(outputStream* st) {
711 if (is_bool()) {
712 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
713 } else if (is_int()) {
714 st->print("-XX:%s=%d", _name, get_int());
715 } else if (is_uint()) {
716 st->print("-XX:%s=%u", _name, get_uint());
717 } else if (is_intx()) {
718 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
719 } else if (is_uintx()) {
720 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
721 } else if (is_uint64_t()) {
722 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
723 } else if (is_size_t()) {
724 st->print("-XX:%s=" SIZE_FORMAT, _name, get_size_t());
725 } else if (is_double()) {
726 st->print("-XX:%s=%f", _name, get_double());
727 } else if (is_ccstr()) {
728 st->print("-XX:%s=", _name);
729 const char* cp = get_ccstr();
730 if (cp != NULL) {
731 // Need to turn embedded '\n's back into separate arguments
732 // Not so efficient to print one character at a time,
733 // but the choice is to do the transformation to a buffer
734 // and print that. And this need not be efficient.
735 for (; *cp != '\0'; cp += 1) {
736 switch (*cp) {
737 default:
738 st->print("%c", *cp);
739 break;
740 case '\n':
741 st->print(" -XX:%s=", _name);
742 break;
743 }
744 }
745 }
746 } else {
747 ShouldNotReachHere();
748 }
749 }
750
751 const char* JVMFlag::flag_error_str(JVMFlag::Error error) {
752 switch (error) {
753 case JVMFlag::MISSING_NAME: return "MISSING_NAME";
754 case JVMFlag::MISSING_VALUE: return "MISSING_VALUE";
755 case JVMFlag::NON_WRITABLE: return "NON_WRITABLE";
756 case JVMFlag::OUT_OF_BOUNDS: return "OUT_OF_BOUNDS";
757 case JVMFlag::VIOLATES_CONSTRAINT: return "VIOLATES_CONSTRAINT";
758 case JVMFlag::INVALID_FLAG: return "INVALID_FLAG";
759 case JVMFlag::ERR_OTHER: return "ERR_OTHER";
760 case JVMFlag::SUCCESS: return "SUCCESS";
761 default: ShouldNotReachHere(); return "NULL";
762 }
763 }
764
765 // 4991491 do not "optimize out" the was_set false values: omitting them
766 // tickles a Microsoft compiler bug causing flagTable to be malformed
767
768 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_PRODUCT) },
769 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_PRODUCT | JVMFlag::KIND_PLATFORM_DEPENDENT) },
770 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_DIAGNOSTIC) },
771 #define RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_DIAGNOSTIC | JVMFlag::KIND_PLATFORM_DEPENDENT) },
772 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_EXPERIMENTAL) },
773 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_MANAGEABLE) },
774 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_PRODUCT | JVMFlag::KIND_READ_WRITE) },
775 #define RUNTIME_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_DEVELOP) },
776 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_DEVELOP | JVMFlag::KIND_PLATFORM_DEPENDENT) },
777 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_NOT_PRODUCT) },
778
779 #define JVMCI_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_PRODUCT) },
780 #define JVMCI_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_PRODUCT | JVMFlag::KIND_PLATFORM_DEPENDENT) },
781 #define JVMCI_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_DIAGNOSTIC) },
782 #define JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_DIAGNOSTIC | JVMFlag::KIND_PLATFORM_DEPENDENT) },
783 #define JVMCI_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_EXPERIMENTAL) },
784 #define JVMCI_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_DEVELOP) },
785 #define JVMCI_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_DEVELOP | JVMFlag::KIND_PLATFORM_DEPENDENT) },
786 #define JVMCI_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_JVMCI | JVMFlag::KIND_NOT_PRODUCT) },
787
788 #ifdef _LP64
789 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_LP64_PRODUCT) },
790 #else
791 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
792 #endif // _LP64
793
794 #define C1_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C1 | JVMFlag::KIND_PRODUCT) },
795 #define C1_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C1 | JVMFlag::KIND_PRODUCT | JVMFlag::KIND_PLATFORM_DEPENDENT) },
796 #define C1_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C1 | JVMFlag::KIND_DIAGNOSTIC) },
797 #define C1_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C1 | JVMFlag::KIND_DIAGNOSTIC | JVMFlag::KIND_PLATFORM_DEPENDENT) },
798 #define C1_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C1 | JVMFlag::KIND_DEVELOP) },
799 #define C1_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C1 | JVMFlag::KIND_DEVELOP | JVMFlag::KIND_PLATFORM_DEPENDENT) },
800 #define C1_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C1 | JVMFlag::KIND_NOT_PRODUCT) },
801
802 #define C2_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_PRODUCT) },
803 #define C2_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_PRODUCT | JVMFlag::KIND_PLATFORM_DEPENDENT) },
804 #define C2_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_DIAGNOSTIC) },
805 #define C2_PD_DIAGNOSTIC_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_DIAGNOSTIC | JVMFlag::KIND_PLATFORM_DEPENDENT) },
806 #define C2_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_EXPERIMENTAL) },
807 #define C2_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_DEVELOP) },
808 #define C2_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_DEVELOP | JVMFlag::KIND_PLATFORM_DEPENDENT) },
809 #define C2_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_C2 | JVMFlag::KIND_NOT_PRODUCT) },
810
811 #define ARCH_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_ARCH | JVMFlag::KIND_PRODUCT) },
812 #define ARCH_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_ARCH | JVMFlag::KIND_DIAGNOSTIC) },
813 #define ARCH_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_ARCH | JVMFlag::KIND_EXPERIMENTAL) },
814 #define ARCH_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_ARCH | JVMFlag::KIND_DEVELOP) },
815 #define ARCH_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), (void*) &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_ARCH | JVMFlag::KIND_NOT_PRODUCT) },
816
817 static JVMFlag flagTable[] = {
818 VM_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
819 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
820 RUNTIME_PRODUCT_FLAG_STRUCT, \
821 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
822 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
823 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
824 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \
825 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
826 RUNTIME_MANAGEABLE_FLAG_STRUCT, \
827 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \
828 RUNTIME_LP64_PRODUCT_FLAG_STRUCT, \
829 IGNORE_RANGE, \
830 IGNORE_CONSTRAINT, \
831 IGNORE_WRITEABLE)
832
833 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
834 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
835 RUNTIME_PRODUCT_FLAG_STRUCT, \
836 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
837 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
838 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
839 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
840 IGNORE_RANGE, \
841 IGNORE_CONSTRAINT, \
842 IGNORE_WRITEABLE)
843 #if INCLUDE_JVMCI
844 JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_STRUCT, \
845 JVMCI_PD_DEVELOP_FLAG_STRUCT, \
846 JVMCI_PRODUCT_FLAG_STRUCT, \
847 JVMCI_PD_PRODUCT_FLAG_STRUCT, \
848 JVMCI_DIAGNOSTIC_FLAG_STRUCT, \
849 JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT, \
850 JVMCI_EXPERIMENTAL_FLAG_STRUCT, \
851 JVMCI_NOTPRODUCT_FLAG_STRUCT, \
852 IGNORE_RANGE, \
853 IGNORE_CONSTRAINT, \
854 IGNORE_WRITEABLE)
855 #endif // INCLUDE_JVMCI
856 #ifdef COMPILER1
857 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, \
858 C1_PD_DEVELOP_FLAG_STRUCT, \
859 C1_PRODUCT_FLAG_STRUCT, \
860 C1_PD_PRODUCT_FLAG_STRUCT, \
861 C1_DIAGNOSTIC_FLAG_STRUCT, \
862 C1_PD_DIAGNOSTIC_FLAG_STRUCT, \
863 C1_NOTPRODUCT_FLAG_STRUCT, \
864 IGNORE_RANGE, \
865 IGNORE_CONSTRAINT, \
866 IGNORE_WRITEABLE)
867 #endif // COMPILER1
868 #ifdef COMPILER2
869 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, \
870 C2_PD_DEVELOP_FLAG_STRUCT, \
871 C2_PRODUCT_FLAG_STRUCT, \
872 C2_PD_PRODUCT_FLAG_STRUCT, \
873 C2_DIAGNOSTIC_FLAG_STRUCT, \
874 C2_PD_DIAGNOSTIC_FLAG_STRUCT, \
875 C2_EXPERIMENTAL_FLAG_STRUCT, \
876 C2_NOTPRODUCT_FLAG_STRUCT, \
877 IGNORE_RANGE, \
878 IGNORE_CONSTRAINT, \
879 IGNORE_WRITEABLE)
880 #endif // COMPILER2
881 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, \
882 ARCH_PRODUCT_FLAG_STRUCT, \
883 ARCH_DIAGNOSTIC_FLAG_STRUCT, \
884 ARCH_EXPERIMENTAL_FLAG_STRUCT, \
885 ARCH_NOTPRODUCT_FLAG_STRUCT, \
886 IGNORE_RANGE, \
887 IGNORE_CONSTRAINT, \
888 IGNORE_WRITEABLE)
889 FLAGTABLE_EXT
890 {0, NULL, NULL}
891 };
892
893 JVMFlag* JVMFlag::flags = flagTable;
894 size_t JVMFlag::numFlags = (sizeof(flagTable) / sizeof(JVMFlag));
895
896 inline bool str_equal(const char* s, size_t s_len, const char* q, size_t q_len) {
897 if (s_len != q_len) return false;
898 return memcmp(s, q, q_len) == 0;
899 }
900
901 // Search the flag table for a named flag
902 JVMFlag* JVMFlag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
903 for (JVMFlag* current = &flagTable[0]; current->_name != NULL; current++) {
904 if (str_equal(current->_name, current->get_name_length(), name, length)) {
905 // Found a matching entry.
906 // Don't report notproduct and develop flags in product builds.
907 if (current->is_constant_in_binary()) {
908 return (return_flag ? current : NULL);
909 }
910 // Report locked flags only if allowed.
911 if (!(current->is_unlocked() || current->is_unlocker())) {
912 if (!allow_locked) {
913 // disable use of locked flags, e.g. diagnostic, experimental,
914 // commercial... until they are explicitly unlocked
915 return NULL;
916 }
917 }
918 return current;
919 }
920 }
921 // JVMFlag name is not in the flag table
922 return NULL;
923 }
924
925 // Get or compute the flag name length
926 size_t JVMFlag::get_name_length() {
927 if (_name_len == 0) {
928 _name_len = strlen(_name);
929 }
930 return _name_len;
931 }
932
933 JVMFlag* JVMFlag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
934 float VMOptionsFuzzyMatchSimilarity = 0.7f;
935 JVMFlag* match = NULL;
936 float score;
937 float max_score = -1;
938
939 for (JVMFlag* current = &flagTable[0]; current->_name != NULL; current++) {
940 score = StringUtils::similarity(current->_name, strlen(current->_name), name, length);
941 if (score > max_score) {
942 max_score = score;
943 match = current;
944 }
945 }
946
947 if (!(match->is_unlocked() || match->is_unlocker())) {
948 if (!allow_locked) {
949 return NULL;
950 }
951 }
952
953 if (max_score < VMOptionsFuzzyMatchSimilarity) {
954 return NULL;
955 }
956
957 return match;
958 }
959
960 // Returns the address of the index'th element
961 static JVMFlag* address_of_flag(JVMFlagsWithType flag) {
962 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
963 return &JVMFlag::flags[flag];
964 }
965
966 bool JVMFlagEx::is_default(JVMFlags flag) {
967 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
968 JVMFlag* f = &JVMFlag::flags[flag];
969 return f->is_default();
970 }
971
972 bool JVMFlagEx::is_ergo(JVMFlags flag) {
973 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
974 JVMFlag* f = &JVMFlag::flags[flag];
975 return f->is_ergonomic();
976 }
977
978 bool JVMFlagEx::is_cmdline(JVMFlags flag) {
979 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
980 JVMFlag* f = &JVMFlag::flags[flag];
981 return f->is_command_line();
982 }
983
984 bool JVMFlag::wasSetOnCmdline(const char* name, bool* value) {
985 JVMFlag* result = JVMFlag::find_flag((char*)name, strlen(name));
986 if (result == NULL) return false;
987 *value = result->is_command_line();
988 return true;
989 }
990
991 void JVMFlagEx::setOnCmdLine(JVMFlagsWithType flag) {
992 JVMFlag* faddr = address_of_flag(flag);
993 assert(faddr != NULL, "Unknown flag");
994 faddr->set_command_line();
995 }
996
997 template<class E, class T>
998 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const JVMFlag::Flags origin) {
999 E e;
1000 e.set_name(name);
1001 e.set_oldValue(old_value);
1002 e.set_newValue(new_value);
1003 e.set_origin(origin);
1004 e.commit();
1005 }
1006
1007 static JVMFlag::Error apply_constraint_and_check_range_bool(const char* name, bool new_value, bool verbose) {
1008 JVMFlag::Error status = JVMFlag::SUCCESS;
1009 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1010 if (constraint != NULL) {
1011 status = constraint->apply_bool(new_value, verbose);
1012 }
1013 return status;
1014 }
1015
1016 JVMFlag::Error JVMFlag::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) {
1017 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1018 if (result == NULL) return JVMFlag::INVALID_FLAG;
1019 if (!result->is_bool()) return JVMFlag::WRONG_FORMAT;
1020 *value = result->get_bool();
1021 return JVMFlag::SUCCESS;
1022 }
1023
1024 JVMFlag::Error JVMFlag::boolAtPut(JVMFlag* flag, bool* value, JVMFlag::Flags origin) {
1025 const char* name;
1026 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1027 if (!flag->is_bool()) return JVMFlag::WRONG_FORMAT;
1028 name = flag->_name;
1029 JVMFlag::Error check = apply_constraint_and_check_range_bool(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1030 if (check != JVMFlag::SUCCESS) return check;
1031 bool old_value = flag->get_bool();
1032 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
1033 check = flag->set_bool(*value);
1034 *value = old_value;
1035 flag->set_origin(origin);
1036 return check;
1037 }
1038
1039 JVMFlag::Error JVMFlag::boolAtPut(const char* name, size_t len, bool* value, JVMFlag::Flags origin) {
1040 JVMFlag* result = JVMFlag::find_flag(name, len);
1041 return boolAtPut(result, value, origin);
1042 }
1043
1044 JVMFlag::Error JVMFlagEx::boolAtPut(JVMFlagsWithType flag, bool value, JVMFlag::Flags origin) {
1045 JVMFlag* faddr = address_of_flag(flag);
1046 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
1047 return JVMFlag::boolAtPut(faddr, &value, origin);
1048 }
1049
1050 static JVMFlag::Error apply_constraint_and_check_range_int(const char* name, int new_value, bool verbose) {
1051 JVMFlag::Error status = JVMFlag::SUCCESS;
1052 JVMFlagRange* range = JVMFlagRangeList::find(name);
1053 if (range != NULL) {
1054 status = range->check_int(new_value, verbose);
1055 }
1056 if (status == JVMFlag::SUCCESS) {
1057 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1058 if (constraint != NULL) {
1059 status = constraint->apply_int(new_value, verbose);
1060 }
1061 }
1062 return status;
1063 }
1064
1065 JVMFlag::Error JVMFlag::intAt(const char* name, size_t len, int* value, bool allow_locked, bool return_flag) {
1066 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1067 if (result == NULL) return JVMFlag::INVALID_FLAG;
1068 if (!result->is_int()) return JVMFlag::WRONG_FORMAT;
1069 *value = result->get_int();
1070 return JVMFlag::SUCCESS;
1071 }
1072
1073 JVMFlag::Error JVMFlag::intAtPut(JVMFlag* flag, int* value, JVMFlag::Flags origin) {
1074 const char* name;
1075 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1076 if (!flag->is_int()) return JVMFlag::WRONG_FORMAT;
1077 name = flag->_name;
1078 JVMFlag::Error check = apply_constraint_and_check_range_int(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1079 if (check != JVMFlag::SUCCESS) return check;
1080 int old_value = flag->get_int();
1081 trace_flag_changed<EventIntFlagChanged, s4>(name, old_value, *value, origin);
1082 check = flag->set_int(*value);
1083 *value = old_value;
1084 flag->set_origin(origin);
1085 return check;
1086 }
1087
1088 JVMFlag::Error JVMFlag::intAtPut(const char* name, size_t len, int* value, JVMFlag::Flags origin) {
1089 JVMFlag* result = JVMFlag::find_flag(name, len);
1090 return intAtPut(result, value, origin);
1091 }
1092
1093 JVMFlag::Error JVMFlagEx::intAtPut(JVMFlagsWithType flag, int value, JVMFlag::Flags origin) {
1094 JVMFlag* faddr = address_of_flag(flag);
1095 guarantee(faddr != NULL && faddr->is_int(), "wrong flag type");
1096 return JVMFlag::intAtPut(faddr, &value, origin);
1097 }
1098
1099 static JVMFlag::Error apply_constraint_and_check_range_uint(const char* name, uint new_value, bool verbose) {
1100 JVMFlag::Error status = JVMFlag::SUCCESS;
1101 JVMFlagRange* range = JVMFlagRangeList::find(name);
1102 if (range != NULL) {
1103 status = range->check_uint(new_value, verbose);
1104 }
1105 if (status == JVMFlag::SUCCESS) {
1106 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1107 if (constraint != NULL) {
1108 status = constraint->apply_uint(new_value, verbose);
1109 }
1110 }
1111 return status;
1112 }
1113
1114 JVMFlag::Error JVMFlag::uintAt(const char* name, size_t len, uint* value, bool allow_locked, bool return_flag) {
1115 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1116 if (result == NULL) return JVMFlag::INVALID_FLAG;
1117 if (!result->is_uint()) return JVMFlag::WRONG_FORMAT;
1118 *value = result->get_uint();
1119 return JVMFlag::SUCCESS;
1120 }
1121
1122 JVMFlag::Error JVMFlag::uintAtPut(JVMFlag* flag, uint* value, JVMFlag::Flags origin) {
1123 const char* name;
1124 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1125 if (!flag->is_uint()) return JVMFlag::WRONG_FORMAT;
1126 name = flag->_name;
1127 JVMFlag::Error check = apply_constraint_and_check_range_uint(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1128 if (check != JVMFlag::SUCCESS) return check;
1129 uint old_value = flag->get_uint();
1130 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(name, old_value, *value, origin);
1131 check = flag->set_uint(*value);
1132 *value = old_value;
1133 flag->set_origin(origin);
1134 return check;
1135 }
1136
1137 JVMFlag::Error JVMFlag::uintAtPut(const char* name, size_t len, uint* value, JVMFlag::Flags origin) {
1138 JVMFlag* result = JVMFlag::find_flag(name, len);
1139 return uintAtPut(result, value, origin);
1140 }
1141
1142 JVMFlag::Error JVMFlagEx::uintAtPut(JVMFlagsWithType flag, uint value, JVMFlag::Flags origin) {
1143 JVMFlag* faddr = address_of_flag(flag);
1144 guarantee(faddr != NULL && faddr->is_uint(), "wrong flag type");
1145 return JVMFlag::uintAtPut(faddr, &value, origin);
1146 }
1147
1148 JVMFlag::Error JVMFlag::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) {
1149 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1150 if (result == NULL) return JVMFlag::INVALID_FLAG;
1151 if (!result->is_intx()) return JVMFlag::WRONG_FORMAT;
1152 *value = result->get_intx();
1153 return JVMFlag::SUCCESS;
1154 }
1155
1156 static JVMFlag::Error apply_constraint_and_check_range_intx(const char* name, intx new_value, bool verbose) {
1157 JVMFlag::Error status = JVMFlag::SUCCESS;
1158 JVMFlagRange* range = JVMFlagRangeList::find(name);
1159 if (range != NULL) {
1160 status = range->check_intx(new_value, verbose);
1161 }
1162 if (status == JVMFlag::SUCCESS) {
1163 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1164 if (constraint != NULL) {
1165 status = constraint->apply_intx(new_value, verbose);
1166 }
1167 }
1168 return status;
1169 }
1170
1171 JVMFlag::Error JVMFlag::intxAtPut(JVMFlag* flag, intx* value, JVMFlag::Flags origin) {
1172 const char* name;
1173 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1174 if (!flag->is_intx()) return JVMFlag::WRONG_FORMAT;
1175 name = flag->_name;
1176 JVMFlag::Error check = apply_constraint_and_check_range_intx(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1177 if (check != JVMFlag::SUCCESS) return check;
1178 intx old_value = flag->get_intx();
1179 trace_flag_changed<EventLongFlagChanged, intx>(name, old_value, *value, origin);
1180 check = flag->set_intx(*value);
1181 *value = old_value;
1182 flag->set_origin(origin);
1183 return check;
1184 }
1185
1186 JVMFlag::Error JVMFlag::intxAtPut(const char* name, size_t len, intx* value, JVMFlag::Flags origin) {
1187 JVMFlag* result = JVMFlag::find_flag(name, len);
1188 return intxAtPut(result, value, origin);
1189 }
1190
1191 JVMFlag::Error JVMFlagEx::intxAtPut(JVMFlagsWithType flag, intx value, JVMFlag::Flags origin) {
1192 JVMFlag* faddr = address_of_flag(flag);
1193 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
1194 return JVMFlag::intxAtPut(faddr, &value, origin);
1195 }
1196
1197 JVMFlag::Error JVMFlag::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
1198 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1199 if (result == NULL) return JVMFlag::INVALID_FLAG;
1200 if (!result->is_uintx()) return JVMFlag::WRONG_FORMAT;
1201 *value = result->get_uintx();
1202 return JVMFlag::SUCCESS;
1203 }
1204
1205 static JVMFlag::Error apply_constraint_and_check_range_uintx(const char* name, uintx new_value, bool verbose) {
1206 JVMFlag::Error status = JVMFlag::SUCCESS;
1207 JVMFlagRange* range = JVMFlagRangeList::find(name);
1208 if (range != NULL) {
1209 status = range->check_uintx(new_value, verbose);
1210 }
1211 if (status == JVMFlag::SUCCESS) {
1212 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1213 if (constraint != NULL) {
1214 status = constraint->apply_uintx(new_value, verbose);
1215 }
1216 }
1217 return status;
1218 }
1219
1220 JVMFlag::Error JVMFlag::uintxAtPut(JVMFlag* flag, uintx* value, JVMFlag::Flags origin) {
1221 const char* name;
1222 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1223 if (!flag->is_uintx()) return JVMFlag::WRONG_FORMAT;
1224 name = flag->_name;
1225 JVMFlag::Error check = apply_constraint_and_check_range_uintx(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1226 if (check != JVMFlag::SUCCESS) return check;
1227 uintx old_value = flag->get_uintx();
1228 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1229 check = flag->set_uintx(*value);
1230 *value = old_value;
1231 flag->set_origin(origin);
1232 return check;
1233 }
1234
1235 JVMFlag::Error JVMFlag::uintxAtPut(const char* name, size_t len, uintx* value, JVMFlag::Flags origin) {
1236 JVMFlag* result = JVMFlag::find_flag(name, len);
1237 return uintxAtPut(result, value, origin);
1238 }
1239
1240 JVMFlag::Error JVMFlagEx::uintxAtPut(JVMFlagsWithType flag, uintx value, JVMFlag::Flags origin) {
1241 JVMFlag* faddr = address_of_flag(flag);
1242 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
1243 return JVMFlag::uintxAtPut(faddr, &value, origin);
1244 }
1245
1246 JVMFlag::Error JVMFlag::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) {
1247 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1248 if (result == NULL) return JVMFlag::INVALID_FLAG;
1249 if (!result->is_uint64_t()) return JVMFlag::WRONG_FORMAT;
1250 *value = result->get_uint64_t();
1251 return JVMFlag::SUCCESS;
1252 }
1253
1254 static JVMFlag::Error apply_constraint_and_check_range_uint64_t(const char* name, uint64_t new_value, bool verbose) {
1255 JVMFlag::Error status = JVMFlag::SUCCESS;
1256 JVMFlagRange* range = JVMFlagRangeList::find(name);
1257 if (range != NULL) {
1258 status = range->check_uint64_t(new_value, verbose);
1259 }
1260 if (status == JVMFlag::SUCCESS) {
1261 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1262 if (constraint != NULL) {
1263 status = constraint->apply_uint64_t(new_value, verbose);
1264 }
1265 }
1266 return status;
1267 }
1268
1269 JVMFlag::Error JVMFlag::uint64_tAtPut(JVMFlag* flag, uint64_t* value, JVMFlag::Flags origin) {
1270 const char* name;
1271 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1272 if (!flag->is_uint64_t()) return JVMFlag::WRONG_FORMAT;
1273 name = flag->_name;
1274 JVMFlag::Error check = apply_constraint_and_check_range_uint64_t(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1275 if (check != JVMFlag::SUCCESS) return check;
1276 uint64_t old_value = flag->get_uint64_t();
1277 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1278 check = flag->set_uint64_t(*value);
1279 *value = old_value;
1280 flag->set_origin(origin);
1281 return check;
1282 }
1283
1284 JVMFlag::Error JVMFlag::uint64_tAtPut(const char* name, size_t len, uint64_t* value, JVMFlag::Flags origin) {
1285 JVMFlag* result = JVMFlag::find_flag(name, len);
1286 return uint64_tAtPut(result, value, origin);
1287 }
1288
1289 JVMFlag::Error JVMFlagEx::uint64_tAtPut(JVMFlagsWithType flag, uint64_t value, JVMFlag::Flags origin) {
1290 JVMFlag* faddr = address_of_flag(flag);
1291 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
1292 return JVMFlag::uint64_tAtPut(faddr, &value, origin);
1293 }
1294
1295 JVMFlag::Error JVMFlag::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) {
1296 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1297 if (result == NULL) return JVMFlag::INVALID_FLAG;
1298 if (!result->is_size_t()) return JVMFlag::WRONG_FORMAT;
1299 *value = result->get_size_t();
1300 return JVMFlag::SUCCESS;
1301 }
1302
1303 static JVMFlag::Error apply_constraint_and_check_range_size_t(const char* name, size_t new_value, bool verbose) {
1304 JVMFlag::Error status = JVMFlag::SUCCESS;
1305 JVMFlagRange* range = JVMFlagRangeList::find(name);
1306 if (range != NULL) {
1307 status = range->check_size_t(new_value, verbose);
1308 }
1309 if (status == JVMFlag::SUCCESS) {
1310 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1311 if (constraint != NULL) {
1312 status = constraint->apply_size_t(new_value, verbose);
1313 }
1314 }
1315 return status;
1316 }
1317
1318
1319 JVMFlag::Error JVMFlag::size_tAtPut(JVMFlag* flag, size_t* value, JVMFlag::Flags origin) {
1320 const char* name;
1321 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1322 if (!flag->is_size_t()) return JVMFlag::WRONG_FORMAT;
1323 name = flag->_name;
1324 JVMFlag::Error check = apply_constraint_and_check_range_size_t(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1325 if (check != JVMFlag::SUCCESS) return check;
1326 size_t old_value = flag->get_size_t();
1327 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1328 check = flag->set_size_t(*value);
1329 *value = old_value;
1330 flag->set_origin(origin);
1331 return check;
1332 }
1333
1334 JVMFlag::Error JVMFlag::size_tAtPut(const char* name, size_t len, size_t* value, JVMFlag::Flags origin) {
1335 JVMFlag* result = JVMFlag::find_flag(name, len);
1336 return size_tAtPut(result, value, origin);
1337 }
1338
1339 JVMFlag::Error JVMFlagEx::size_tAtPut(JVMFlagsWithType flag, size_t value, JVMFlag::Flags origin) {
1340 JVMFlag* faddr = address_of_flag(flag);
1341 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type");
1342 return JVMFlag::size_tAtPut(faddr, &value, origin);
1343 }
1344
1345 JVMFlag::Error JVMFlag::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) {
1346 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1347 if (result == NULL) return JVMFlag::INVALID_FLAG;
1348 if (!result->is_double()) return JVMFlag::WRONG_FORMAT;
1349 *value = result->get_double();
1350 return JVMFlag::SUCCESS;
1351 }
1352
1353 static JVMFlag::Error apply_constraint_and_check_range_double(const char* name, double new_value, bool verbose) {
1354 JVMFlag::Error status = JVMFlag::SUCCESS;
1355 JVMFlagRange* range = JVMFlagRangeList::find(name);
1356 if (range != NULL) {
1357 status = range->check_double(new_value, verbose);
1358 }
1359 if (status == JVMFlag::SUCCESS) {
1360 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1361 if (constraint != NULL) {
1362 status = constraint->apply_double(new_value, verbose);
1363 }
1364 }
1365 return status;
1366 }
1367
1368 JVMFlag::Error JVMFlag::doubleAtPut(JVMFlag* flag, double* value, JVMFlag::Flags origin) {
1369 const char* name;
1370 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1371 if (!flag->is_double()) return JVMFlag::WRONG_FORMAT;
1372 name = flag->_name;
1373 JVMFlag::Error check = apply_constraint_and_check_range_double(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1374 if (check != JVMFlag::SUCCESS) return check;
1375 double old_value = flag->get_double();
1376 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
1377 check = flag->set_double(*value);
1378 *value = old_value;
1379 flag->set_origin(origin);
1380 return check;
1381 }
1382
1383 JVMFlag::Error JVMFlag::doubleAtPut(const char* name, size_t len, double* value, JVMFlag::Flags origin) {
1384 JVMFlag* result = JVMFlag::find_flag(name, len);
1385 return doubleAtPut(result, value, origin);
1386 }
1387
1388 JVMFlag::Error JVMFlagEx::doubleAtPut(JVMFlagsWithType flag, double value, JVMFlag::Flags origin) {
1389 JVMFlag* faddr = address_of_flag(flag);
1390 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
1391 return JVMFlag::doubleAtPut(faddr, &value, origin);
1392 }
1393
1394 JVMFlag::Error JVMFlag::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) {
1395 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1396 if (result == NULL) return JVMFlag::INVALID_FLAG;
1397 if (!result->is_ccstr()) return JVMFlag::WRONG_FORMAT;
1398 *value = result->get_ccstr();
1399 return JVMFlag::SUCCESS;
1400 }
1401
1402 JVMFlag::Error JVMFlag::ccstrAtPut(const char* name, size_t len, ccstr* value, JVMFlag::Flags origin) {
1403 JVMFlag* result = JVMFlag::find_flag(name, len);
1404 if (result == NULL) return JVMFlag::INVALID_FLAG;
1405 if (!result->is_ccstr()) return JVMFlag::WRONG_FORMAT;
1406 ccstr old_value = result->get_ccstr();
1407 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
1408 char* new_value = NULL;
1409 if (*value != NULL) {
1410 new_value = os::strdup_check_oom(*value);
1411 }
1412 JVMFlag::Error check = result->set_ccstr(new_value);
1413 if (result->is_default() && old_value != NULL) {
1414 // Prior value is NOT heap allocated, but was a literal constant.
1415 old_value = os::strdup_check_oom(old_value);
1416 }
1417 *value = old_value;
1418 result->set_origin(origin);
1419 return check;
1420 }
1421
1422 JVMFlag::Error JVMFlagEx::ccstrAtPut(JVMFlagsWithType flag, ccstr value, JVMFlag::Flags origin) {
1423 JVMFlag* faddr = address_of_flag(flag);
1424 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
1425 ccstr old_value = faddr->get_ccstr();
1426 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
1427 char* new_value = os::strdup_check_oom(value);
1428 JVMFlag::Error check = faddr->set_ccstr(new_value);
1429 if (!faddr->is_default() && old_value != NULL) {
1430 // Prior value is heap allocated so free it.
1431 FREE_C_HEAP_ARRAY(char, old_value);
1432 }
1433 faddr->set_origin(origin);
1434 return check;
1435 }
1436
1437 extern "C" {
1438 static int compare_flags(const void* void_a, const void* void_b) {
1439 return strcmp((*((JVMFlag**) void_a))->_name, (*((JVMFlag**) void_b))->_name);
1440 }
1441 }
1442
1443 void JVMFlag::printSetFlags(outputStream* out) {
1444 // Print which flags were set on the command line
1445 // note: this method is called before the thread structure is in place
1446 // which means resource allocation cannot be used.
1447
1448 // The last entry is the null entry.
1449 const size_t length = JVMFlag::numFlags - 1;
1450
1451 // Sort
1452 JVMFlag** array = NEW_C_HEAP_ARRAY(JVMFlag*, length, mtArguments);
1453 for (size_t i = 0; i < length; i++) {
1454 array[i] = &flagTable[i];
1455 }
1456 qsort(array, length, sizeof(JVMFlag*), compare_flags);
1457
1458 // Print
1459 for (size_t i = 0; i < length; i++) {
1460 if (array[i]->get_origin() /* naked field! */) {
1461 array[i]->print_as_flag(out);
1462 out->print(" ");
1463 }
1464 }
1465 out->cr();
1466 FREE_C_HEAP_ARRAY(JVMFlag*, array);
1467 }
1468
1469 #ifndef PRODUCT
1470
1471 void JVMFlag::verify() {
1472 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
1473 }
1474
1475 #endif // PRODUCT
1476
1477 void JVMFlag::printFlags(outputStream* out, bool withComments, bool printRanges) {
1478 // Print the flags sorted by name
1479 // note: this method is called before the thread structure is in place
1480 // which means resource allocation cannot be used.
1481
1482 // The last entry is the null entry.
1483 const size_t length = JVMFlag::numFlags - 1;
1484
1485 // Sort
1486 JVMFlag** array = NEW_C_HEAP_ARRAY(JVMFlag*, length, mtArguments);
1487 for (size_t i = 0; i < length; i++) {
1488 array[i] = &flagTable[i];
1489 }
1490 qsort(array, length, sizeof(JVMFlag*), compare_flags);
1491
1492 // Print
1493 if (!printRanges) {
1494 out->print_cr("[Global flags]");
1495 } else {
1496 out->print_cr("[Global flags ranges]");
1497 }
1498
1499 for (size_t i = 0; i < length; i++) {
1500 if (array[i]->is_unlocked()) {
1501 array[i]->print_on(out, withComments, printRanges);
1502 }
1503 }
1504 FREE_C_HEAP_ARRAY(JVMFlag*, array);
1505 }
1506