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 "jfr/jfrEvents.hpp"
27 #include "memory/allocation.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #include "runtime/flags/jvmFlag.hpp"
30 #include "runtime/flags/jvmFlagConstraintList.hpp"
31 #include "runtime/flags/jvmFlagWriteableList.hpp"
32 #include "runtime/flags/jvmFlagRangeList.hpp"
33 #include "runtime/globals_extension.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 /**
330 * Returns if this flag is a constant in the binary. Right now this is
331 * true for notproduct and develop flags in product builds.
332 */
333 bool JVMFlag::is_constant_in_binary() const {
334 #ifdef PRODUCT
335 return is_notproduct() || is_develop();
336 #else
337 return false;
338 #endif
339 }
340
341 bool JVMFlag::is_unlocker() const {
342 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
343 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
344 is_unlocker_ext();
345 }
346
347 bool JVMFlag::is_unlocked() const {
348 if (is_diagnostic()) {
349 return UnlockDiagnosticVMOptions;
350 }
351 if (is_experimental()) {
352 return UnlockExperimentalVMOptions;
353 }
354 return is_unlocked_ext();
355 }
356
357 void JVMFlag::clear_diagnostic() {
358 assert(is_diagnostic(), "sanity");
359 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
360 assert(!is_diagnostic(), "sanity");
361 }
362
363 // Get custom message for this locked flag, or NULL if
364 // none is available. Returns message type produced.
365 JVMFlag::MsgType JVMFlag::get_locked_message(char* buf, int buflen) const {
366 buf[0] = '\0';
367 if (is_diagnostic() && !is_unlocked()) {
368 jio_snprintf(buf, buflen,
369 "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n"
370 "Error: The unlock option must precede '%s'.\n",
371 _name, _name);
372 return JVMFlag::DIAGNOSTIC_FLAG_BUT_LOCKED;
373 }
374 if (is_experimental() && !is_unlocked()) {
375 jio_snprintf(buf, buflen,
376 "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n"
377 "Error: The unlock option must precede '%s'.\n",
378 _name, _name);
379 return JVMFlag::EXPERIMENTAL_FLAG_BUT_LOCKED;
380 }
381 if (is_develop() && is_product_build()) {
382 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
383 _name);
384 return JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD;
385 }
386 if (is_notproduct() && is_product_build()) {
387 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
388 _name);
389 return JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD;
390 }
391 return get_locked_message_ext(buf, buflen);
392 }
393
394 bool JVMFlag::is_writeable() const {
395 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
396 }
397
398 // All flags except "manageable" are assumed to be internal flags.
399 // Long term, we need to define a mechanism to specify which flags
400 // are external/stable and change this function accordingly.
401 bool JVMFlag::is_external() const {
402 return is_manageable() || is_external_ext();
403 }
404
405 // Helper function for JVMFlag::print_on().
406 // Fills current line up to requested position.
407 // Should the current position already be past the requested position,
408 // one separator blank is enforced.
409 void fill_to_pos(outputStream* st, unsigned int req_pos) {
410 if ((unsigned int)st->position() < req_pos) {
411 st->fill_to(req_pos); // need to fill with blanks to reach req_pos
412 } else {
413 st->print(" "); // enforce blank separation. Previous field too long.
414 }
415 }
416
417 void JVMFlag::print_on(outputStream* st, bool withComments, bool printRanges) {
418 // Don't print notproduct and develop flags in a product build.
419 if (is_constant_in_binary()) {
420 return;
421 }
422
423 if (!printRanges) {
424 // The command line options -XX:+PrintFlags* cause this function to be called
425 // for each existing flag to print information pertinent to this flag. The data
426 // is displayed in columnar form, with the following layout:
427 // col1 - data type, right-justified
428 // col2 - name, left-justified
429 // col3 - ' =' double-char, leading space to align with possible '+='
430 // col4 - value left-justified
431 // col5 - kind right-justified
432 // col6 - origin left-justified
433 // col7 - comments left-justified
434 //
435 // The column widths are fixed. They are defined such that, for most cases,
436 // an eye-pleasing tabular output is created.
437 //
438 // Sample output:
439 // bool CMSScavengeBeforeRemark = false {product} {default}
440 // uintx CMSScheduleRemarkEdenPenetration = 50 {product} {default}
441 // size_t CMSScheduleRemarkEdenSizeThreshold = 2097152 {product} {default}
442 // uintx CMSScheduleRemarkSamplingRatio = 5 {product} {default}
443 // double CMSSmallCoalSurplusPercent = 1.050000 {product} {default}
444 // ccstr CompileCommandFile = MyFile.cmd {product} {command line}
445 // ccstrlist CompileOnly = Method1
446 // CompileOnly += Method2 {product} {command line}
447 // | | | | | | |
448 // | | | | | | +-- col7
449 // | | | | | +-- col6
450 // | | | | +-- col5
451 // | | | +-- col4
452 // | | +-- col3
453 // | +-- col2
454 // +-- col1
455
456 const unsigned int col_spacing = 1;
457 const unsigned int col1_pos = 0;
458 const unsigned int col1_width = 9;
459 const unsigned int col2_pos = col1_pos + col1_width + col_spacing;
460 const unsigned int col2_width = 39;
461 const unsigned int col3_pos = col2_pos + col2_width + col_spacing;
462 const unsigned int col3_width = 2;
463 const unsigned int col4_pos = col3_pos + col3_width + col_spacing;
464 const unsigned int col4_width = 30;
465 const unsigned int col5_pos = col4_pos + col4_width + col_spacing;
466 const unsigned int col5_width = 20;
467 const unsigned int col6_pos = col5_pos + col5_width + col_spacing;
468 const unsigned int col6_width = 15;
469 const unsigned int col7_pos = col6_pos + col6_width + col_spacing;
470 const unsigned int col7_width = 1;
471
472 st->fill_to(col1_pos);
473 st->print("%*s", col1_width, _type); // right-justified, therefore width is required.
474
475 fill_to_pos(st, col2_pos);
476 st->print("%s", _name);
477
478 fill_to_pos(st, col3_pos);
479 st->print(" ="); // use " =" for proper alignment with multiline ccstr output.
480
481 fill_to_pos(st, col4_pos);
482 if (is_bool()) {
483 st->print("%s", get_bool() ? "true" : "false");
484 } else if (is_int()) {
485 st->print("%d", get_int());
486 } else if (is_uint()) {
487 st->print("%u", get_uint());
488 } else if (is_intx()) {
489 st->print(INTX_FORMAT, get_intx());
490 } else if (is_uintx()) {
491 st->print(UINTX_FORMAT, get_uintx());
492 } else if (is_uint64_t()) {
493 st->print(UINT64_FORMAT, get_uint64_t());
494 } else if (is_size_t()) {
495 st->print(SIZE_FORMAT, get_size_t());
496 } else if (is_double()) {
497 st->print("%f", get_double());
498 } else if (is_ccstr()) {
499 // Honor <newline> characters in ccstr: print multiple lines.
500 const char* cp = get_ccstr();
501 if (cp != NULL) {
502 const char* eol;
503 while ((eol = strchr(cp, '\n')) != NULL) {
504 size_t llen = pointer_delta(eol, cp, sizeof(char));
505 st->print("%.*s", (int)llen, cp);
506 st->cr();
507 cp = eol+1;
508 fill_to_pos(st, col2_pos);
509 st->print("%s", _name);
510 fill_to_pos(st, col3_pos);
511 st->print("+=");
512 fill_to_pos(st, col4_pos);
513 }
514 st->print("%s", cp);
515 }
516 } else {
517 st->print("unhandled type %s", _type);
518 st->cr();
519 return;
520 }
521
522 fill_to_pos(st, col5_pos);
523 print_kind(st, col5_width);
524
525 fill_to_pos(st, col6_pos);
526 print_origin(st, col6_width);
527
528 #ifndef PRODUCT
529 if (withComments) {
530 fill_to_pos(st, col7_pos);
531 st->print("%s", _doc);
532 }
533 #endif
534 st->cr();
535 } else if (!is_bool() && !is_ccstr()) {
536 // The command line options -XX:+PrintFlags* cause this function to be called
537 // for each existing flag to print information pertinent to this flag. The data
538 // is displayed in columnar form, with the following layout:
539 // col1 - data type, right-justified
540 // col2 - name, left-justified
541 // col4 - range [ min ... max]
542 // col5 - kind right-justified
543 // col6 - origin left-justified
544 // col7 - comments left-justified
545 //
546 // The column widths are fixed. They are defined such that, for most cases,
547 // an eye-pleasing tabular output is created.
548 //
549 // Sample output:
550 // intx MinPassesBeforeFlush [ 0 ... 9223372036854775807 ] {diagnostic} {default}
551 // uintx MinRAMFraction [ 1 ... 18446744073709551615 ] {product} {default}
552 // double MinRAMPercentage [ 0.000 ... 100.000 ] {product} {default}
553 // uintx MinSurvivorRatio [ 3 ... 18446744073709551615 ] {product} {default}
554 // size_t MinTLABSize [ 1 ... 9223372036854775807 ] {product} {default}
555 // intx MonitorBound [ 0 ... 2147483647 ] {product} {default}
556 // | | | | | |
557 // | | | | | +-- col7
558 // | | | | +-- col6
559 // | | | +-- col5
560 // | | +-- col4
561 // | +-- col2
562 // +-- col1
563
564 const unsigned int col_spacing = 1;
565 const unsigned int col1_pos = 0;
566 const unsigned int col1_width = 9;
567 const unsigned int col2_pos = col1_pos + col1_width + col_spacing;
568 const unsigned int col2_width = 49;
569 const unsigned int col3_pos = col2_pos + col2_width + col_spacing;
570 const unsigned int col3_width = 0;
571 const unsigned int col4_pos = col3_pos + col3_width + col_spacing;
572 const unsigned int col4_width = 60;
573 const unsigned int col5_pos = col4_pos + col4_width + col_spacing;
574 const unsigned int col5_width = 35;
575 const unsigned int col6_pos = col5_pos + col5_width + col_spacing;
576 const unsigned int col6_width = 15;
577 const unsigned int col7_pos = col6_pos + col6_width + col_spacing;
578 const unsigned int col7_width = 1;
579
580 st->fill_to(col1_pos);
581 st->print("%*s", col1_width, _type); // right-justified, therefore width is required.
582
583 fill_to_pos(st, col2_pos);
584 st->print("%s", _name);
585
586 fill_to_pos(st, col4_pos);
587 RangeStrFunc func = NULL;
588 if (is_int()) {
589 func = JVMFlag::get_int_default_range_str;
590 } else if (is_uint()) {
591 func = JVMFlag::get_uint_default_range_str;
592 } else if (is_intx()) {
593 func = JVMFlag::get_intx_default_range_str;
594 } else if (is_uintx()) {
595 func = JVMFlag::get_uintx_default_range_str;
596 } else if (is_uint64_t()) {
597 func = JVMFlag::get_uint64_t_default_range_str;
598 } else if (is_size_t()) {
599 func = JVMFlag::get_size_t_default_range_str;
600 } else if (is_double()) {
601 func = JVMFlag::get_double_default_range_str;
602 } else {
603 st->print("unhandled type %s", _type);
604 st->cr();
605 return;
606 }
607 JVMFlagRangeList::print(st, _name, func);
608
609 fill_to_pos(st, col5_pos);
610 print_kind(st, col5_width);
611
612 fill_to_pos(st, col6_pos);
613 print_origin(st, col6_width);
614
615 #ifndef PRODUCT
616 if (withComments) {
617 fill_to_pos(st, col7_pos);
618 st->print("%s", _doc);
619 }
620 #endif
621 st->cr();
622 }
623 }
624
625 void JVMFlag::print_kind(outputStream* st, unsigned int width) {
626 struct Data {
627 int flag;
628 const char* name;
629 };
630
631 Data data[] = {
632 { KIND_JVMCI, "JVMCI" },
633 { KIND_C1, "C1" },
634 { KIND_C2, "C2" },
635 { KIND_ARCH, "ARCH" },
636 { KIND_PLATFORM_DEPENDENT, "pd" },
637 { KIND_PRODUCT, "product" },
638 { KIND_MANAGEABLE, "manageable" },
639 { KIND_DIAGNOSTIC, "diagnostic" },
640 { KIND_EXPERIMENTAL, "experimental" },
641 { KIND_NOT_PRODUCT, "notproduct" },
642 { KIND_DEVELOP, "develop" },
643 { KIND_LP64_PRODUCT, "lp64_product" },
644 { KIND_READ_WRITE, "rw" },
645 { -1, "" }
646 };
647
648 if ((_flags & KIND_MASK) != 0) {
649 bool is_first = true;
650 const size_t buffer_size = 64;
651 size_t buffer_used = 0;
652 char kind[buffer_size];
653
654 jio_snprintf(kind, buffer_size, "{");
655 buffer_used++;
656 for (int i = 0; data[i].flag != -1; i++) {
657 Data d = data[i];
658 if ((_flags & d.flag) != 0) {
659 if (is_first) {
660 is_first = false;
661 } else {
662 assert(buffer_used + 1 < buffer_size, "Too small buffer");
663 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, " ");
664 buffer_used++;
665 }
666 size_t length = strlen(d.name);
667 assert(buffer_used + length < buffer_size, "Too small buffer");
668 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "%s", d.name);
669 buffer_used += length;
670 }
671 }
672 assert(buffer_used + 2 <= buffer_size, "Too small buffer");
673 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "}");
674 st->print("%*s", width, kind);
675 }
676 }
677
678 void JVMFlag::print_origin(outputStream* st, unsigned int width) {
679 int origin = _flags & VALUE_ORIGIN_MASK;
680 st->print("{");
681 switch(origin) {
682 case DEFAULT:
683 st->print("default"); break;
684 case COMMAND_LINE:
685 st->print("command line"); break;
686 case ENVIRON_VAR:
687 st->print("environment"); break;
688 case CONFIG_FILE:
689 st->print("config file"); break;
690 case MANAGEMENT:
691 st->print("management"); break;
692 case ERGONOMIC:
693 if (_flags & ORIG_COMMAND_LINE) {
694 st->print("command line, ");
695 }
696 st->print("ergonomic"); break;
697 case ATTACH_ON_DEMAND:
698 st->print("attach"); break;
699 case INTERNAL:
700 st->print("internal"); break;
701 }
702 st->print("}");
703 }
704
705 void JVMFlag::print_as_flag(outputStream* st) {
706 if (is_bool()) {
707 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
708 } else if (is_int()) {
709 st->print("-XX:%s=%d", _name, get_int());
710 } else if (is_uint()) {
711 st->print("-XX:%s=%u", _name, get_uint());
712 } else if (is_intx()) {
713 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
714 } else if (is_uintx()) {
715 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
716 } else if (is_uint64_t()) {
717 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
718 } else if (is_size_t()) {
719 st->print("-XX:%s=" SIZE_FORMAT, _name, get_size_t());
720 } else if (is_double()) {
721 st->print("-XX:%s=%f", _name, get_double());
722 } else if (is_ccstr()) {
723 st->print("-XX:%s=", _name);
724 const char* cp = get_ccstr();
725 if (cp != NULL) {
726 // Need to turn embedded '\n's back into separate arguments
727 // Not so efficient to print one character at a time,
728 // but the choice is to do the transformation to a buffer
729 // and print that. And this need not be efficient.
730 for (; *cp != '\0'; cp += 1) {
731 switch (*cp) {
732 default:
733 st->print("%c", *cp);
734 break;
735 case '\n':
736 st->print(" -XX:%s=", _name);
737 break;
738 }
739 }
740 }
741 } else {
742 ShouldNotReachHere();
743 }
744 }
745
746 const char* JVMFlag::flag_error_str(JVMFlag::Error error) {
747 switch (error) {
748 case JVMFlag::MISSING_NAME: return "MISSING_NAME";
749 case JVMFlag::MISSING_VALUE: return "MISSING_VALUE";
750 case JVMFlag::NON_WRITABLE: return "NON_WRITABLE";
751 case JVMFlag::OUT_OF_BOUNDS: return "OUT_OF_BOUNDS";
752 case JVMFlag::VIOLATES_CONSTRAINT: return "VIOLATES_CONSTRAINT";
753 case JVMFlag::INVALID_FLAG: return "INVALID_FLAG";
754 case JVMFlag::ERR_OTHER: return "ERR_OTHER";
755 case JVMFlag::SUCCESS: return "SUCCESS";
756 default: ShouldNotReachHere(); return "NULL";
757 }
758 }
759
760 // 4991491 do not "optimize out" the was_set false values: omitting them
761 // tickles a Microsoft compiler bug causing flagTable to be malformed
762
763 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_PRODUCT) },
764 #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) },
765 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_DIAGNOSTIC) },
766 #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) },
767 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_EXPERIMENTAL) },
768 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_MANAGEABLE) },
769 #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) },
770 #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) },
771 #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) },
772 #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) },
773
774 #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) },
775 #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) },
776 #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) },
777 #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) },
778 #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) },
779 #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) },
780 #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) },
781 #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) },
782
783 #ifdef _LP64
784 #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) },
785 #else
786 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
787 #endif // _LP64
788
789 #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) },
790 #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) },
791 #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) },
792 #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) },
793 #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) },
794 #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) },
795 #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) },
796
797 #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) },
798 #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) },
799 #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) },
800 #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) },
801 #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) },
802 #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) },
803 #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) },
804 #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) },
805
806 #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) },
807 #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) },
808 #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) },
809 #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) },
810 #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) },
811
812 static JVMFlag flagTable[] = {
813 VM_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
814 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
815 RUNTIME_PRODUCT_FLAG_STRUCT, \
816 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
817 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
818 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
819 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \
820 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
821 RUNTIME_MANAGEABLE_FLAG_STRUCT, \
822 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \
823 RUNTIME_LP64_PRODUCT_FLAG_STRUCT, \
824 IGNORE_RANGE, \
825 IGNORE_CONSTRAINT, \
826 IGNORE_WRITEABLE)
827
828 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
829 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
830 RUNTIME_PRODUCT_FLAG_STRUCT, \
831 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
832 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
833 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
834 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
835 IGNORE_RANGE, \
836 IGNORE_CONSTRAINT, \
837 IGNORE_WRITEABLE)
838 #if INCLUDE_JVMCI
839 JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_STRUCT, \
840 JVMCI_PD_DEVELOP_FLAG_STRUCT, \
841 JVMCI_PRODUCT_FLAG_STRUCT, \
842 JVMCI_PD_PRODUCT_FLAG_STRUCT, \
843 JVMCI_DIAGNOSTIC_FLAG_STRUCT, \
844 JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT, \
845 JVMCI_EXPERIMENTAL_FLAG_STRUCT, \
846 JVMCI_NOTPRODUCT_FLAG_STRUCT, \
847 IGNORE_RANGE, \
848 IGNORE_CONSTRAINT, \
849 IGNORE_WRITEABLE)
850 #endif // INCLUDE_JVMCI
851 #ifdef COMPILER1
852 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, \
853 C1_PD_DEVELOP_FLAG_STRUCT, \
854 C1_PRODUCT_FLAG_STRUCT, \
855 C1_PD_PRODUCT_FLAG_STRUCT, \
856 C1_DIAGNOSTIC_FLAG_STRUCT, \
857 C1_PD_DIAGNOSTIC_FLAG_STRUCT, \
858 C1_NOTPRODUCT_FLAG_STRUCT, \
859 IGNORE_RANGE, \
860 IGNORE_CONSTRAINT, \
861 IGNORE_WRITEABLE)
862 #endif // COMPILER1
863 #ifdef COMPILER2
864 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, \
865 C2_PD_DEVELOP_FLAG_STRUCT, \
866 C2_PRODUCT_FLAG_STRUCT, \
867 C2_PD_PRODUCT_FLAG_STRUCT, \
868 C2_DIAGNOSTIC_FLAG_STRUCT, \
869 C2_PD_DIAGNOSTIC_FLAG_STRUCT, \
870 C2_EXPERIMENTAL_FLAG_STRUCT, \
871 C2_NOTPRODUCT_FLAG_STRUCT, \
872 IGNORE_RANGE, \
873 IGNORE_CONSTRAINT, \
874 IGNORE_WRITEABLE)
875 #endif // COMPILER2
876 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, \
877 ARCH_PRODUCT_FLAG_STRUCT, \
878 ARCH_DIAGNOSTIC_FLAG_STRUCT, \
879 ARCH_EXPERIMENTAL_FLAG_STRUCT, \
880 ARCH_NOTPRODUCT_FLAG_STRUCT, \
881 IGNORE_RANGE, \
882 IGNORE_CONSTRAINT, \
883 IGNORE_WRITEABLE)
884 FLAGTABLE_EXT
885 {0, NULL, NULL}
886 };
887
888 JVMFlag* JVMFlag::flags = flagTable;
889 size_t JVMFlag::numFlags = (sizeof(flagTable) / sizeof(JVMFlag));
890
891 inline bool str_equal(const char* s, size_t s_len, const char* q, size_t q_len) {
892 if (s_len != q_len) return false;
893 return memcmp(s, q, q_len) == 0;
894 }
895
896 // Search the flag table for a named flag
897 JVMFlag* JVMFlag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
898 for (JVMFlag* current = &flagTable[0]; current->_name != NULL; current++) {
899 if (str_equal(current->_name, current->get_name_length(), name, length)) {
900 // Found a matching entry.
901 // Don't report notproduct and develop flags in product builds.
902 if (current->is_constant_in_binary()) {
903 return (return_flag ? current : NULL);
904 }
905 // Report locked flags only if allowed.
906 if (!(current->is_unlocked() || current->is_unlocker())) {
907 if (!allow_locked) {
908 // disable use of locked flags, e.g. diagnostic, experimental,
909 // etc. until they are explicitly unlocked
910 return NULL;
911 }
912 }
913 return current;
914 }
915 }
916 // JVMFlag name is not in the flag table
917 return NULL;
918 }
919
920 // Get or compute the flag name length
921 size_t JVMFlag::get_name_length() {
922 if (_name_len == 0) {
923 _name_len = strlen(_name);
924 }
925 return _name_len;
926 }
927
928 JVMFlag* JVMFlag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
929 float VMOptionsFuzzyMatchSimilarity = 0.7f;
930 JVMFlag* match = NULL;
931 float score;
932 float max_score = -1;
933
934 for (JVMFlag* current = &flagTable[0]; current->_name != NULL; current++) {
935 score = StringUtils::similarity(current->_name, strlen(current->_name), name, length);
936 if (score > max_score) {
937 max_score = score;
938 match = current;
939 }
940 }
941
942 if (!(match->is_unlocked() || match->is_unlocker())) {
943 if (!allow_locked) {
944 return NULL;
945 }
946 }
947
948 if (max_score < VMOptionsFuzzyMatchSimilarity) {
949 return NULL;
950 }
951
952 return match;
953 }
954
955 // Returns the address of the index'th element
956 static JVMFlag* address_of_flag(JVMFlagsWithType flag) {
957 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
958 return &JVMFlag::flags[flag];
959 }
960
961 bool JVMFlagEx::is_default(JVMFlags flag) {
962 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
963 JVMFlag* f = &JVMFlag::flags[flag];
964 return f->is_default();
965 }
966
967 bool JVMFlagEx::is_ergo(JVMFlags flag) {
968 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
969 JVMFlag* f = &JVMFlag::flags[flag];
970 return f->is_ergonomic();
971 }
972
973 bool JVMFlagEx::is_cmdline(JVMFlags flag) {
974 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
975 JVMFlag* f = &JVMFlag::flags[flag];
976 return f->is_command_line();
977 }
978
979 bool JVMFlag::wasSetOnCmdline(const char* name, bool* value) {
980 JVMFlag* result = JVMFlag::find_flag((char*)name, strlen(name));
981 if (result == NULL) return false;
982 *value = result->is_command_line();
983 return true;
984 }
985
986 void JVMFlagEx::setOnCmdLine(JVMFlagsWithType flag) {
987 JVMFlag* faddr = address_of_flag(flag);
988 assert(faddr != NULL, "Unknown flag");
989 faddr->set_command_line();
990 }
991
992 template<class E, class T>
993 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const JVMFlag::Flags origin) {
994 E e;
995 e.set_name(name);
996 e.set_oldValue(old_value);
997 e.set_newValue(new_value);
998 e.set_origin(origin);
999 e.commit();
1000 }
1001
1002 static JVMFlag::Error apply_constraint_and_check_range_bool(const char* name, bool new_value, bool verbose) {
1003 JVMFlag::Error status = JVMFlag::SUCCESS;
1004 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1005 if (constraint != NULL) {
1006 status = constraint->apply_bool(new_value, verbose);
1007 }
1008 return status;
1009 }
1010
1011 JVMFlag::Error JVMFlag::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) {
1012 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1013 if (result == NULL) return JVMFlag::INVALID_FLAG;
1014 if (!result->is_bool()) return JVMFlag::WRONG_FORMAT;
1015 *value = result->get_bool();
1016 return JVMFlag::SUCCESS;
1017 }
1018
1019 JVMFlag::Error JVMFlag::boolAtPut(JVMFlag* flag, bool* value, JVMFlag::Flags origin) {
1020 const char* name;
1021 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1022 if (!flag->is_bool()) return JVMFlag::WRONG_FORMAT;
1023 name = flag->_name;
1024 JVMFlag::Error check = apply_constraint_and_check_range_bool(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1025 if (check != JVMFlag::SUCCESS) return check;
1026 bool old_value = flag->get_bool();
1027 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
1028 check = flag->set_bool(*value);
1029 *value = old_value;
1030 flag->set_origin(origin);
1031 return check;
1032 }
1033
1034 JVMFlag::Error JVMFlag::boolAtPut(const char* name, size_t len, bool* value, JVMFlag::Flags origin) {
1035 JVMFlag* result = JVMFlag::find_flag(name, len);
1036 return boolAtPut(result, value, origin);
1037 }
1038
1039 JVMFlag::Error JVMFlagEx::boolAtPut(JVMFlagsWithType flag, bool value, JVMFlag::Flags origin) {
1040 JVMFlag* faddr = address_of_flag(flag);
1041 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
1042 return JVMFlag::boolAtPut(faddr, &value, origin);
1043 }
1044
1045 static JVMFlag::Error apply_constraint_and_check_range_int(const char* name, int new_value, bool verbose) {
1046 JVMFlag::Error status = JVMFlag::SUCCESS;
1047 JVMFlagRange* range = JVMFlagRangeList::find(name);
1048 if (range != NULL) {
1049 status = range->check_int(new_value, verbose);
1050 }
1051 if (status == JVMFlag::SUCCESS) {
1052 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1053 if (constraint != NULL) {
1054 status = constraint->apply_int(new_value, verbose);
1055 }
1056 }
1057 return status;
1058 }
1059
1060 JVMFlag::Error JVMFlag::intAt(const char* name, size_t len, int* value, bool allow_locked, bool return_flag) {
1061 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1062 if (result == NULL) return JVMFlag::INVALID_FLAG;
1063 if (!result->is_int()) return JVMFlag::WRONG_FORMAT;
1064 *value = result->get_int();
1065 return JVMFlag::SUCCESS;
1066 }
1067
1068 JVMFlag::Error JVMFlag::intAtPut(JVMFlag* flag, int* value, JVMFlag::Flags origin) {
1069 const char* name;
1070 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1071 if (!flag->is_int()) return JVMFlag::WRONG_FORMAT;
1072 name = flag->_name;
1073 JVMFlag::Error check = apply_constraint_and_check_range_int(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1074 if (check != JVMFlag::SUCCESS) return check;
1075 int old_value = flag->get_int();
1076 trace_flag_changed<EventIntFlagChanged, s4>(name, old_value, *value, origin);
1077 check = flag->set_int(*value);
1078 *value = old_value;
1079 flag->set_origin(origin);
1080 return check;
1081 }
1082
1083 JVMFlag::Error JVMFlag::intAtPut(const char* name, size_t len, int* value, JVMFlag::Flags origin) {
1084 JVMFlag* result = JVMFlag::find_flag(name, len);
1085 return intAtPut(result, value, origin);
1086 }
1087
1088 JVMFlag::Error JVMFlagEx::intAtPut(JVMFlagsWithType flag, int value, JVMFlag::Flags origin) {
1089 JVMFlag* faddr = address_of_flag(flag);
1090 guarantee(faddr != NULL && faddr->is_int(), "wrong flag type");
1091 return JVMFlag::intAtPut(faddr, &value, origin);
1092 }
1093
1094 static JVMFlag::Error apply_constraint_and_check_range_uint(const char* name, uint new_value, bool verbose) {
1095 JVMFlag::Error status = JVMFlag::SUCCESS;
1096 JVMFlagRange* range = JVMFlagRangeList::find(name);
1097 if (range != NULL) {
1098 status = range->check_uint(new_value, verbose);
1099 }
1100 if (status == JVMFlag::SUCCESS) {
1101 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1102 if (constraint != NULL) {
1103 status = constraint->apply_uint(new_value, verbose);
1104 }
1105 }
1106 return status;
1107 }
1108
1109 JVMFlag::Error JVMFlag::uintAt(const char* name, size_t len, uint* value, bool allow_locked, bool return_flag) {
1110 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1111 if (result == NULL) return JVMFlag::INVALID_FLAG;
1112 if (!result->is_uint()) return JVMFlag::WRONG_FORMAT;
1113 *value = result->get_uint();
1114 return JVMFlag::SUCCESS;
1115 }
1116
1117 JVMFlag::Error JVMFlag::uintAtPut(JVMFlag* flag, uint* value, JVMFlag::Flags origin) {
1118 const char* name;
1119 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1120 if (!flag->is_uint()) return JVMFlag::WRONG_FORMAT;
1121 name = flag->_name;
1122 JVMFlag::Error check = apply_constraint_and_check_range_uint(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1123 if (check != JVMFlag::SUCCESS) return check;
1124 uint old_value = flag->get_uint();
1125 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(name, old_value, *value, origin);
1126 check = flag->set_uint(*value);
1127 *value = old_value;
1128 flag->set_origin(origin);
1129 return check;
1130 }
1131
1132 JVMFlag::Error JVMFlag::uintAtPut(const char* name, size_t len, uint* value, JVMFlag::Flags origin) {
1133 JVMFlag* result = JVMFlag::find_flag(name, len);
1134 return uintAtPut(result, value, origin);
1135 }
1136
1137 JVMFlag::Error JVMFlagEx::uintAtPut(JVMFlagsWithType flag, uint value, JVMFlag::Flags origin) {
1138 JVMFlag* faddr = address_of_flag(flag);
1139 guarantee(faddr != NULL && faddr->is_uint(), "wrong flag type");
1140 return JVMFlag::uintAtPut(faddr, &value, origin);
1141 }
1142
1143 JVMFlag::Error JVMFlag::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) {
1144 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1145 if (result == NULL) return JVMFlag::INVALID_FLAG;
1146 if (!result->is_intx()) return JVMFlag::WRONG_FORMAT;
1147 *value = result->get_intx();
1148 return JVMFlag::SUCCESS;
1149 }
1150
1151 static JVMFlag::Error apply_constraint_and_check_range_intx(const char* name, intx new_value, bool verbose) {
1152 JVMFlag::Error status = JVMFlag::SUCCESS;
1153 JVMFlagRange* range = JVMFlagRangeList::find(name);
1154 if (range != NULL) {
1155 status = range->check_intx(new_value, verbose);
1156 }
1157 if (status == JVMFlag::SUCCESS) {
1158 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1159 if (constraint != NULL) {
1160 status = constraint->apply_intx(new_value, verbose);
1161 }
1162 }
1163 return status;
1164 }
1165
1166 JVMFlag::Error JVMFlag::intxAtPut(JVMFlag* flag, intx* value, JVMFlag::Flags origin) {
1167 const char* name;
1168 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1169 if (!flag->is_intx()) return JVMFlag::WRONG_FORMAT;
1170 name = flag->_name;
1171 JVMFlag::Error check = apply_constraint_and_check_range_intx(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1172 if (check != JVMFlag::SUCCESS) return check;
1173 intx old_value = flag->get_intx();
1174 trace_flag_changed<EventLongFlagChanged, intx>(name, old_value, *value, origin);
1175 check = flag->set_intx(*value);
1176 *value = old_value;
1177 flag->set_origin(origin);
1178 return check;
1179 }
1180
1181 JVMFlag::Error JVMFlag::intxAtPut(const char* name, size_t len, intx* value, JVMFlag::Flags origin) {
1182 JVMFlag* result = JVMFlag::find_flag(name, len);
1183 return intxAtPut(result, value, origin);
1184 }
1185
1186 JVMFlag::Error JVMFlagEx::intxAtPut(JVMFlagsWithType flag, intx value, JVMFlag::Flags origin) {
1187 JVMFlag* faddr = address_of_flag(flag);
1188 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
1189 return JVMFlag::intxAtPut(faddr, &value, origin);
1190 }
1191
1192 JVMFlag::Error JVMFlag::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
1193 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1194 if (result == NULL) return JVMFlag::INVALID_FLAG;
1195 if (!result->is_uintx()) return JVMFlag::WRONG_FORMAT;
1196 *value = result->get_uintx();
1197 return JVMFlag::SUCCESS;
1198 }
1199
1200 static JVMFlag::Error apply_constraint_and_check_range_uintx(const char* name, uintx new_value, bool verbose) {
1201 JVMFlag::Error status = JVMFlag::SUCCESS;
1202 JVMFlagRange* range = JVMFlagRangeList::find(name);
1203 if (range != NULL) {
1204 status = range->check_uintx(new_value, verbose);
1205 }
1206 if (status == JVMFlag::SUCCESS) {
1207 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1208 if (constraint != NULL) {
1209 status = constraint->apply_uintx(new_value, verbose);
1210 }
1211 }
1212 return status;
1213 }
1214
1215 JVMFlag::Error JVMFlag::uintxAtPut(JVMFlag* flag, uintx* value, JVMFlag::Flags origin) {
1216 const char* name;
1217 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1218 if (!flag->is_uintx()) return JVMFlag::WRONG_FORMAT;
1219 name = flag->_name;
1220 JVMFlag::Error check = apply_constraint_and_check_range_uintx(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1221 if (check != JVMFlag::SUCCESS) return check;
1222 uintx old_value = flag->get_uintx();
1223 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1224 check = flag->set_uintx(*value);
1225 *value = old_value;
1226 flag->set_origin(origin);
1227 return check;
1228 }
1229
1230 JVMFlag::Error JVMFlag::uintxAtPut(const char* name, size_t len, uintx* value, JVMFlag::Flags origin) {
1231 JVMFlag* result = JVMFlag::find_flag(name, len);
1232 return uintxAtPut(result, value, origin);
1233 }
1234
1235 JVMFlag::Error JVMFlagEx::uintxAtPut(JVMFlagsWithType flag, uintx value, JVMFlag::Flags origin) {
1236 JVMFlag* faddr = address_of_flag(flag);
1237 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
1238 return JVMFlag::uintxAtPut(faddr, &value, origin);
1239 }
1240
1241 JVMFlag::Error JVMFlag::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) {
1242 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1243 if (result == NULL) return JVMFlag::INVALID_FLAG;
1244 if (!result->is_uint64_t()) return JVMFlag::WRONG_FORMAT;
1245 *value = result->get_uint64_t();
1246 return JVMFlag::SUCCESS;
1247 }
1248
1249 static JVMFlag::Error apply_constraint_and_check_range_uint64_t(const char* name, uint64_t new_value, bool verbose) {
1250 JVMFlag::Error status = JVMFlag::SUCCESS;
1251 JVMFlagRange* range = JVMFlagRangeList::find(name);
1252 if (range != NULL) {
1253 status = range->check_uint64_t(new_value, verbose);
1254 }
1255 if (status == JVMFlag::SUCCESS) {
1256 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1257 if (constraint != NULL) {
1258 status = constraint->apply_uint64_t(new_value, verbose);
1259 }
1260 }
1261 return status;
1262 }
1263
1264 JVMFlag::Error JVMFlag::uint64_tAtPut(JVMFlag* flag, uint64_t* value, JVMFlag::Flags origin) {
1265 const char* name;
1266 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1267 if (!flag->is_uint64_t()) return JVMFlag::WRONG_FORMAT;
1268 name = flag->_name;
1269 JVMFlag::Error check = apply_constraint_and_check_range_uint64_t(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1270 if (check != JVMFlag::SUCCESS) return check;
1271 uint64_t old_value = flag->get_uint64_t();
1272 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1273 check = flag->set_uint64_t(*value);
1274 *value = old_value;
1275 flag->set_origin(origin);
1276 return check;
1277 }
1278
1279 JVMFlag::Error JVMFlag::uint64_tAtPut(const char* name, size_t len, uint64_t* value, JVMFlag::Flags origin) {
1280 JVMFlag* result = JVMFlag::find_flag(name, len);
1281 return uint64_tAtPut(result, value, origin);
1282 }
1283
1284 JVMFlag::Error JVMFlagEx::uint64_tAtPut(JVMFlagsWithType flag, uint64_t value, JVMFlag::Flags origin) {
1285 JVMFlag* faddr = address_of_flag(flag);
1286 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
1287 return JVMFlag::uint64_tAtPut(faddr, &value, origin);
1288 }
1289
1290 JVMFlag::Error JVMFlag::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) {
1291 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1292 if (result == NULL) return JVMFlag::INVALID_FLAG;
1293 if (!result->is_size_t()) return JVMFlag::WRONG_FORMAT;
1294 *value = result->get_size_t();
1295 return JVMFlag::SUCCESS;
1296 }
1297
1298 static JVMFlag::Error apply_constraint_and_check_range_size_t(const char* name, size_t new_value, bool verbose) {
1299 JVMFlag::Error status = JVMFlag::SUCCESS;
1300 JVMFlagRange* range = JVMFlagRangeList::find(name);
1301 if (range != NULL) {
1302 status = range->check_size_t(new_value, verbose);
1303 }
1304 if (status == JVMFlag::SUCCESS) {
1305 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1306 if (constraint != NULL) {
1307 status = constraint->apply_size_t(new_value, verbose);
1308 }
1309 }
1310 return status;
1311 }
1312
1313
1314 JVMFlag::Error JVMFlag::size_tAtPut(JVMFlag* flag, size_t* value, JVMFlag::Flags origin) {
1315 const char* name;
1316 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1317 if (!flag->is_size_t()) return JVMFlag::WRONG_FORMAT;
1318 name = flag->_name;
1319 JVMFlag::Error check = apply_constraint_and_check_range_size_t(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1320 if (check != JVMFlag::SUCCESS) return check;
1321 size_t old_value = flag->get_size_t();
1322 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
1323 check = flag->set_size_t(*value);
1324 *value = old_value;
1325 flag->set_origin(origin);
1326 return check;
1327 }
1328
1329 JVMFlag::Error JVMFlag::size_tAtPut(const char* name, size_t len, size_t* value, JVMFlag::Flags origin) {
1330 JVMFlag* result = JVMFlag::find_flag(name, len);
1331 return size_tAtPut(result, value, origin);
1332 }
1333
1334 JVMFlag::Error JVMFlagEx::size_tAtPut(JVMFlagsWithType flag, size_t value, JVMFlag::Flags origin) {
1335 JVMFlag* faddr = address_of_flag(flag);
1336 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type");
1337 return JVMFlag::size_tAtPut(faddr, &value, origin);
1338 }
1339
1340 JVMFlag::Error JVMFlag::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) {
1341 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1342 if (result == NULL) return JVMFlag::INVALID_FLAG;
1343 if (!result->is_double()) return JVMFlag::WRONG_FORMAT;
1344 *value = result->get_double();
1345 return JVMFlag::SUCCESS;
1346 }
1347
1348 static JVMFlag::Error apply_constraint_and_check_range_double(const char* name, double new_value, bool verbose) {
1349 JVMFlag::Error status = JVMFlag::SUCCESS;
1350 JVMFlagRange* range = JVMFlagRangeList::find(name);
1351 if (range != NULL) {
1352 status = range->check_double(new_value, verbose);
1353 }
1354 if (status == JVMFlag::SUCCESS) {
1355 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(name);
1356 if (constraint != NULL) {
1357 status = constraint->apply_double(new_value, verbose);
1358 }
1359 }
1360 return status;
1361 }
1362
1363 JVMFlag::Error JVMFlag::doubleAtPut(JVMFlag* flag, double* value, JVMFlag::Flags origin) {
1364 const char* name;
1365 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1366 if (!flag->is_double()) return JVMFlag::WRONG_FORMAT;
1367 name = flag->_name;
1368 JVMFlag::Error check = apply_constraint_and_check_range_double(name, *value, !JVMFlagConstraintList::validated_after_ergo());
1369 if (check != JVMFlag::SUCCESS) return check;
1370 double old_value = flag->get_double();
1371 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
1372 check = flag->set_double(*value);
1373 *value = old_value;
1374 flag->set_origin(origin);
1375 return check;
1376 }
1377
1378 JVMFlag::Error JVMFlag::doubleAtPut(const char* name, size_t len, double* value, JVMFlag::Flags origin) {
1379 JVMFlag* result = JVMFlag::find_flag(name, len);
1380 return doubleAtPut(result, value, origin);
1381 }
1382
1383 JVMFlag::Error JVMFlagEx::doubleAtPut(JVMFlagsWithType flag, double value, JVMFlag::Flags origin) {
1384 JVMFlag* faddr = address_of_flag(flag);
1385 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
1386 return JVMFlag::doubleAtPut(faddr, &value, origin);
1387 }
1388
1389 JVMFlag::Error JVMFlag::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) {
1390 JVMFlag* result = JVMFlag::find_flag(name, len, allow_locked, return_flag);
1391 if (result == NULL) return JVMFlag::INVALID_FLAG;
1392 if (!result->is_ccstr()) return JVMFlag::WRONG_FORMAT;
1393 *value = result->get_ccstr();
1394 return JVMFlag::SUCCESS;
1395 }
1396
1397 JVMFlag::Error JVMFlag::ccstrAtPut(const char* name, size_t len, ccstr* value, JVMFlag::Flags origin) {
1398 JVMFlag* result = JVMFlag::find_flag(name, len);
1399 if (result == NULL) return JVMFlag::INVALID_FLAG;
1400 if (!result->is_ccstr()) return JVMFlag::WRONG_FORMAT;
1401 ccstr old_value = result->get_ccstr();
1402 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
1403 char* new_value = NULL;
1404 if (*value != NULL) {
1405 new_value = os::strdup_check_oom(*value);
1406 }
1407 JVMFlag::Error check = result->set_ccstr(new_value);
1408 if (result->is_default() && old_value != NULL) {
1409 // Prior value is NOT heap allocated, but was a literal constant.
1410 old_value = os::strdup_check_oom(old_value);
1411 }
1412 *value = old_value;
1413 result->set_origin(origin);
1414 return check;
1415 }
1416
1417 JVMFlag::Error JVMFlagEx::ccstrAtPut(JVMFlagsWithType flag, ccstr value, JVMFlag::Flags origin) {
1418 JVMFlag* faddr = address_of_flag(flag);
1419 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
1420 ccstr old_value = faddr->get_ccstr();
1421 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
1422 char* new_value = os::strdup_check_oom(value);
1423 JVMFlag::Error check = faddr->set_ccstr(new_value);
1424 if (!faddr->is_default() && old_value != NULL) {
1425 // Prior value is heap allocated so free it.
1426 FREE_C_HEAP_ARRAY(char, old_value);
1427 }
1428 faddr->set_origin(origin);
1429 return check;
1430 }
1431
1432 extern "C" {
1433 static int compare_flags(const void* void_a, const void* void_b) {
1434 return strcmp((*((JVMFlag**) void_a))->_name, (*((JVMFlag**) void_b))->_name);
1435 }
1436 }
1437
1438 void JVMFlag::printSetFlags(outputStream* out) {
1439 // Print which flags were set on the command line
1440 // note: this method is called before the thread structure is in place
1441 // which means resource allocation cannot be used.
1442
1443 // The last entry is the null entry.
1444 const size_t length = JVMFlag::numFlags - 1;
1445
1446 // Sort
1447 JVMFlag** array = NEW_C_HEAP_ARRAY(JVMFlag*, length, mtArguments);
1448 for (size_t i = 0; i < length; i++) {
1449 array[i] = &flagTable[i];
1450 }
1451 qsort(array, length, sizeof(JVMFlag*), compare_flags);
1452
1453 // Print
1454 for (size_t i = 0; i < length; i++) {
1455 if (array[i]->get_origin() /* naked field! */) {
1456 array[i]->print_as_flag(out);
1457 out->print(" ");
1458 }
1459 }
1460 out->cr();
1461 FREE_C_HEAP_ARRAY(JVMFlag*, array);
1462 }
1463
1464 #ifndef PRODUCT
1465
1466 void JVMFlag::verify() {
1467 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
1468 }
1469
1470 #endif // PRODUCT
1471
1472 void JVMFlag::printFlags(outputStream* out, bool withComments, bool printRanges, bool skipDefaults) {
1473 // Print the flags sorted by name
1474 // note: this method is called before the thread structure is in place
1475 // which means resource allocation cannot be used.
1476
1477 // The last entry is the null entry.
1478 const size_t length = JVMFlag::numFlags - 1;
1479
1480 // Sort
1481 JVMFlag** array = NEW_C_HEAP_ARRAY(JVMFlag*, length, mtArguments);
1482 for (size_t i = 0; i < length; i++) {
1483 array[i] = &flagTable[i];
1484 }
1485 qsort(array, length, sizeof(JVMFlag*), compare_flags);
1486
1487 // Print
1488 if (!printRanges) {
1489 out->print_cr("[Global flags]");
1490 } else {
1491 out->print_cr("[Global flags ranges]");
1492 }
1493
1494 for (size_t i = 0; i < length; i++) {
1495 if (array[i]->is_unlocked() && !(skipDefaults && array[i]->is_default())) {
1496 array[i]->print_on(out, withComments, printRanges);
1497 }
1498 }
1499 FREE_C_HEAP_ARRAY(JVMFlag*, array);
1500 }
1501
1502 void JVMFlag::printError(bool verbose, const char* msg, ...) {
1503 if (verbose) {
1504 va_list listPointer;
1505 va_start(listPointer, msg);
1506 jio_vfprintf(defaultStream::error_stream(), msg, listPointer);
1507 va_end(listPointer);
1508 }
1509 }
1510