1 /*
2 * Copyright (c) 1997, 2020, 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/jvmFlagRangeList.hpp"
32 #include "runtime/globals_extension.hpp"
33 #include "utilities/defaultStream.hpp"
34 #include "utilities/stringUtils.hpp"
35
36 #define DEFAULT_RANGE_STR_CHUNK_SIZE 64
37 static char* create_range_str(const char *fmt, ...) {
38 static size_t string_length = DEFAULT_RANGE_STR_CHUNK_SIZE;
39 static char* range_string = NEW_C_HEAP_ARRAY(char, string_length, mtLogging);
40
41 int size_needed = 0;
42 do {
43 va_list args;
44 va_start(args, fmt);
45 size_needed = jio_vsnprintf(range_string, string_length, fmt, args);
46 va_end(args);
47
48 if (size_needed < 0) {
49 string_length += DEFAULT_RANGE_STR_CHUNK_SIZE;
50 range_string = REALLOC_C_HEAP_ARRAY(char, range_string, string_length, mtLogging);
51 guarantee(range_string != NULL, "create_range_str string should not be NULL");
52 }
53 } while (size_needed < 0);
54
55 return range_string;
56 }
57
58 const char* JVMFlag::get_int_default_range_str() {
59 return create_range_str("[ " INT32_FORMAT_W(-25) " ... " INT32_FORMAT_W(25) " ]", INT_MIN, INT_MAX);
60 }
61
62 const char* JVMFlag::get_uint_default_range_str() {
63 return create_range_str("[ " UINT32_FORMAT_W(-25) " ... " UINT32_FORMAT_W(25) " ]", 0, UINT_MAX);
64 }
65
66 const char* JVMFlag::get_intx_default_range_str() {
67 return create_range_str("[ " INTX_FORMAT_W(-25) " ... " INTX_FORMAT_W(25) " ]", min_intx, max_intx);
68 }
69
70 const char* JVMFlag::get_uintx_default_range_str() {
71 return create_range_str("[ " UINTX_FORMAT_W(-25) " ... " UINTX_FORMAT_W(25) " ]", 0, max_uintx);
72 }
73
74 const char* JVMFlag::get_uint64_t_default_range_str() {
75 return create_range_str("[ " UINT64_FORMAT_W(-25) " ... " UINT64_FORMAT_W(25) " ]", 0, uint64_t(max_juint));
76 }
77
78 const char* JVMFlag::get_size_t_default_range_str() {
79 return create_range_str("[ " SIZE_FORMAT_W(-25) " ... " SIZE_FORMAT_W(25) " ]", 0, SIZE_MAX);
80 }
81
82 const char* JVMFlag::get_double_default_range_str() {
83 return create_range_str("[ %-25.3f ... %25.3f ]", DBL_MIN, DBL_MAX);
84 }
85
86 static bool is_product_build() {
87 #ifdef PRODUCT
88 return true;
89 #else
90 return false;
91 #endif
92 }
93
94 bool JVMFlag::is_bool() const {
95 return strcmp(_type, "bool") == 0;
96 }
97
98 bool JVMFlag::is_int() const {
99 return strcmp(_type, "int") == 0;
100 }
101
102 bool JVMFlag::is_uint() const {
103 return strcmp(_type, "uint") == 0;
104 }
105
106 bool JVMFlag::is_intx() const {
107 return strcmp(_type, "intx") == 0;
108 }
109
110 bool JVMFlag::is_uintx() const {
111 return strcmp(_type, "uintx") == 0;
112 }
113
114 bool JVMFlag::is_uint64_t() const {
115 return strcmp(_type, "uint64_t") == 0;
116 }
117
118 bool JVMFlag::is_size_t() const {
119 return strcmp(_type, "size_t") == 0;
120 }
121
122 bool JVMFlag::is_double() const {
123 return strcmp(_type, "double") == 0;
124 }
125
126 bool JVMFlag::is_ccstr() const {
127 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
128 }
129
130 bool JVMFlag::ccstr_accumulates() const {
131 return strcmp(_type, "ccstrlist") == 0;
132 }
133
134 JVMFlag::Flags JVMFlag::get_origin() {
135 return Flags(_flags & VALUE_ORIGIN_MASK);
136 }
137
138 void JVMFlag::set_origin(Flags origin) {
139 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
140 Flags new_origin = Flags((origin == COMMAND_LINE) ? Flags(origin | ORIG_COMMAND_LINE) : origin);
141 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | new_origin);
142 }
143
144 bool JVMFlag::is_default() {
145 return (get_origin() == DEFAULT);
146 }
147
148 bool JVMFlag::is_ergonomic() {
149 return (get_origin() == ERGONOMIC);
150 }
151
152 bool JVMFlag::is_command_line() {
153 return (_flags & ORIG_COMMAND_LINE) != 0;
154 }
155
156 void JVMFlag::set_command_line() {
157 _flags = Flags(_flags | ORIG_COMMAND_LINE);
158 }
159
160 bool JVMFlag::is_product() const {
161 return (_flags & KIND_PRODUCT) != 0;
162 }
163
164 bool JVMFlag::is_manageable() const {
165 return (_flags & KIND_MANAGEABLE) != 0;
166 }
167
168 bool JVMFlag::is_diagnostic() const {
169 return (_flags & KIND_DIAGNOSTIC) != 0;
170 }
171
172 bool JVMFlag::is_experimental() const {
173 return (_flags & KIND_EXPERIMENTAL) != 0;
174 }
175
176 bool JVMFlag::is_notproduct() const {
177 return (_flags & KIND_NOT_PRODUCT) != 0;
178 }
179
180 bool JVMFlag::is_develop() const {
181 return (_flags & KIND_DEVELOP) != 0;
182 }
183
184 bool JVMFlag::is_read_write() const {
185 return (_flags & KIND_READ_WRITE) != 0;
186 }
187
188 /**
189 * Returns if this flag is a constant in the binary. Right now this is
190 * true for notproduct and develop flags in product builds.
191 */
192 bool JVMFlag::is_constant_in_binary() const {
193 #ifdef PRODUCT
194 return is_notproduct() || is_develop();
195 #else
196 return false;
197 #endif
198 }
199
200 bool JVMFlag::is_unlocker() const {
201 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
202 strcmp(_name, "UnlockExperimentalVMOptions") == 0;
203 }
204
205 bool JVMFlag::is_unlocked() const {
206 if (is_diagnostic()) {
207 return UnlockDiagnosticVMOptions;
208 }
209 if (is_experimental()) {
210 return UnlockExperimentalVMOptions;
211 }
212 return true;
213 }
214
215 void JVMFlag::clear_diagnostic() {
216 assert(is_diagnostic(), "sanity");
217 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
218 assert(!is_diagnostic(), "sanity");
219 }
220
221 void JVMFlag::clear_experimental() {
222 assert(is_experimental(), "sanity");
223 _flags = Flags(_flags & ~KIND_EXPERIMENTAL);
224 assert(!is_experimental(), "sanity");
225 }
226
227 void JVMFlag::set_product() {
228 assert(!is_product(), "sanity");
229 _flags = Flags(_flags | KIND_PRODUCT);
230 assert(is_product(), "sanity");
231 }
232
233 // Get custom message for this locked flag, or NULL if
234 // none is available. Returns message type produced.
235 JVMFlag::MsgType JVMFlag::get_locked_message(char* buf, int buflen) const {
236 buf[0] = '\0';
237 if (is_diagnostic() && !is_unlocked()) {
238 jio_snprintf(buf, buflen,
239 "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n"
240 "Error: The unlock option must precede '%s'.\n",
241 _name, _name);
242 return JVMFlag::DIAGNOSTIC_FLAG_BUT_LOCKED;
243 }
244 if (is_experimental() && !is_unlocked()) {
245 jio_snprintf(buf, buflen,
246 "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n"
247 "Error: The unlock option must precede '%s'.\n",
248 _name, _name);
249 return JVMFlag::EXPERIMENTAL_FLAG_BUT_LOCKED;
250 }
251 if (is_develop() && is_product_build()) {
252 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
253 _name);
254 return JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD;
255 }
256 if (is_notproduct() && is_product_build()) {
257 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
258 _name);
259 return JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD;
260 }
261 return JVMFlag::NONE;
262 }
263
264 bool JVMFlag::is_writeable() const {
265 return is_manageable() || (is_product() && is_read_write());
266 }
267
268 // All flags except "manageable" are assumed to be internal flags.
269 // Long term, we need to define a mechanism to specify which flags
270 // are external/stable and change this function accordingly.
271 bool JVMFlag::is_external() const {
272 return is_manageable();
273 }
274
275 // Helper function for JVMFlag::print_on().
276 // Fills current line up to requested position.
277 // Should the current position already be past the requested position,
278 // one separator blank is enforced.
279 void fill_to_pos(outputStream* st, unsigned int req_pos) {
280 if ((unsigned int)st->position() < req_pos) {
281 st->fill_to(req_pos); // need to fill with blanks to reach req_pos
282 } else {
283 st->print(" "); // enforce blank separation. Previous field too long.
284 }
285 }
286
287 void JVMFlag::print_on(outputStream* st, bool withComments, bool printRanges) {
288 // Don't print notproduct and develop flags in a product build.
289 if (is_constant_in_binary()) {
290 return;
291 }
292
293 if (!printRanges) {
294 // The command line options -XX:+PrintFlags* cause this function to be called
295 // for each existing flag to print information pertinent to this flag. The data
296 // is displayed in columnar form, with the following layout:
297 // col1 - data type, right-justified
298 // col2 - name, left-justified
299 // col3 - ' =' double-char, leading space to align with possible '+='
300 // col4 - value left-justified
301 // col5 - kind right-justified
302 // col6 - origin left-justified
303 // col7 - comments left-justified
304 //
305 // The column widths are fixed. They are defined such that, for most cases,
306 // an eye-pleasing tabular output is created.
307 //
308 // Sample output:
309 // bool ThreadPriorityVerbose = false {product} {default}
310 // uintx ThresholdTolerance = 10 {product} {default}
311 // size_t TLABSize = 0 {product} {default}
312 // uintx SurvivorRatio = 8 {product} {default}
313 // double InitialRAMPercentage = 1.562500 {product} {default}
314 // ccstr CompileCommandFile = MyFile.cmd {product} {command line}
315 // ccstrlist CompileOnly = Method1
316 // CompileOnly += Method2 {product} {command line}
317 // | | | | | | |
318 // | | | | | | +-- col7
319 // | | | | | +-- col6
320 // | | | | +-- col5
321 // | | | +-- col4
322 // | | +-- col3
323 // | +-- col2
324 // +-- col1
325
326 const unsigned int col_spacing = 1;
327 const unsigned int col1_pos = 0;
328 const unsigned int col1_width = 9;
329 const unsigned int col2_pos = col1_pos + col1_width + col_spacing;
330 const unsigned int col2_width = 39;
331 const unsigned int col3_pos = col2_pos + col2_width + col_spacing;
332 const unsigned int col3_width = 2;
333 const unsigned int col4_pos = col3_pos + col3_width + col_spacing;
334 const unsigned int col4_width = 30;
335 const unsigned int col5_pos = col4_pos + col4_width + col_spacing;
336 const unsigned int col5_width = 20;
337 const unsigned int col6_pos = col5_pos + col5_width + col_spacing;
338 const unsigned int col6_width = 15;
339 const unsigned int col7_pos = col6_pos + col6_width + col_spacing;
340 const unsigned int col7_width = 1;
341
342 st->fill_to(col1_pos);
343 st->print("%*s", col1_width, _type); // right-justified, therefore width is required.
344
345 fill_to_pos(st, col2_pos);
346 st->print("%s", _name);
347
348 fill_to_pos(st, col3_pos);
349 st->print(" ="); // use " =" for proper alignment with multiline ccstr output.
350
351 fill_to_pos(st, col4_pos);
352 if (is_bool()) {
353 st->print("%s", get_bool() ? "true" : "false");
354 } else if (is_int()) {
355 st->print("%d", get_int());
356 } else if (is_uint()) {
357 st->print("%u", get_uint());
358 } else if (is_intx()) {
359 st->print(INTX_FORMAT, get_intx());
360 } else if (is_uintx()) {
361 st->print(UINTX_FORMAT, get_uintx());
362 } else if (is_uint64_t()) {
363 st->print(UINT64_FORMAT, get_uint64_t());
364 } else if (is_size_t()) {
365 st->print(SIZE_FORMAT, get_size_t());
366 } else if (is_double()) {
367 st->print("%f", get_double());
368 } else if (is_ccstr()) {
369 // Honor <newline> characters in ccstr: print multiple lines.
370 const char* cp = get_ccstr();
371 if (cp != NULL) {
372 const char* eol;
373 while ((eol = strchr(cp, '\n')) != NULL) {
374 size_t llen = pointer_delta(eol, cp, sizeof(char));
375 st->print("%.*s", (int)llen, cp);
376 st->cr();
377 cp = eol+1;
378 fill_to_pos(st, col2_pos);
379 st->print("%s", _name);
380 fill_to_pos(st, col3_pos);
381 st->print("+=");
382 fill_to_pos(st, col4_pos);
383 }
384 st->print("%s", cp);
385 }
386 } else {
387 st->print("unhandled type %s", _type);
388 st->cr();
389 return;
390 }
391
392 fill_to_pos(st, col5_pos);
393 print_kind(st, col5_width);
394
395 fill_to_pos(st, col6_pos);
396 print_origin(st, col6_width);
397
398 #ifndef PRODUCT
399 if (withComments) {
400 fill_to_pos(st, col7_pos);
401 st->print("%s", _doc);
402 }
403 #endif
404 st->cr();
405 } else if (!is_bool() && !is_ccstr()) {
406 // The command line options -XX:+PrintFlags* cause this function to be called
407 // for each existing flag to print information pertinent to this flag. The data
408 // is displayed in columnar form, with the following layout:
409 // col1 - data type, right-justified
410 // col2 - name, left-justified
411 // col4 - range [ min ... max]
412 // col5 - kind right-justified
413 // col6 - origin left-justified
414 // col7 - comments left-justified
415 //
416 // The column widths are fixed. They are defined such that, for most cases,
417 // an eye-pleasing tabular output is created.
418 //
419 // Sample output:
420 // intx MinPassesBeforeFlush [ 0 ... 9223372036854775807 ] {diagnostic} {default}
421 // uintx MinRAMFraction [ 1 ... 18446744073709551615 ] {product} {default}
422 // double MinRAMPercentage [ 0.000 ... 100.000 ] {product} {default}
423 // uintx MinSurvivorRatio [ 3 ... 18446744073709551615 ] {product} {default}
424 // size_t MinTLABSize [ 1 ... 9223372036854775807 ] {product} {default}
425 // intx MonitorBound [ 0 ... 2147483647 ] {product} {default}
426 // | | | | | |
427 // | | | | | +-- col7
428 // | | | | +-- col6
429 // | | | +-- col5
430 // | | +-- col4
431 // | +-- col2
432 // +-- col1
433
434 const unsigned int col_spacing = 1;
435 const unsigned int col1_pos = 0;
436 const unsigned int col1_width = 9;
437 const unsigned int col2_pos = col1_pos + col1_width + col_spacing;
438 const unsigned int col2_width = 49;
439 const unsigned int col3_pos = col2_pos + col2_width + col_spacing;
440 const unsigned int col3_width = 0;
441 const unsigned int col4_pos = col3_pos + col3_width + col_spacing;
442 const unsigned int col4_width = 60;
443 const unsigned int col5_pos = col4_pos + col4_width + col_spacing;
444 const unsigned int col5_width = 35;
445 const unsigned int col6_pos = col5_pos + col5_width + col_spacing;
446 const unsigned int col6_width = 15;
447 const unsigned int col7_pos = col6_pos + col6_width + col_spacing;
448 const unsigned int col7_width = 1;
449
450 st->fill_to(col1_pos);
451 st->print("%*s", col1_width, _type); // right-justified, therefore width is required.
452
453 fill_to_pos(st, col2_pos);
454 st->print("%s", _name);
455
456 fill_to_pos(st, col4_pos);
457 RangeStrFunc func = NULL;
458 if (is_int()) {
459 func = JVMFlag::get_int_default_range_str;
460 } else if (is_uint()) {
461 func = JVMFlag::get_uint_default_range_str;
462 } else if (is_intx()) {
463 func = JVMFlag::get_intx_default_range_str;
464 } else if (is_uintx()) {
465 func = JVMFlag::get_uintx_default_range_str;
466 } else if (is_uint64_t()) {
467 func = JVMFlag::get_uint64_t_default_range_str;
468 } else if (is_size_t()) {
469 func = JVMFlag::get_size_t_default_range_str;
470 } else if (is_double()) {
471 func = JVMFlag::get_double_default_range_str;
472 } else {
473 st->print("unhandled type %s", _type);
474 st->cr();
475 return;
476 }
477 JVMFlagRangeList::print(st, this, func);
478
479 fill_to_pos(st, col5_pos);
480 print_kind(st, col5_width);
481
482 fill_to_pos(st, col6_pos);
483 print_origin(st, col6_width);
484
485 #ifndef PRODUCT
486 if (withComments) {
487 fill_to_pos(st, col7_pos);
488 st->print("%s", _doc);
489 }
490 #endif
491 st->cr();
492 }
493 }
494
495 void JVMFlag::print_kind(outputStream* st, unsigned int width) {
496 struct Data {
497 int flag;
498 const char* name;
499 };
500
501 Data data[] = {
502 { KIND_JVMCI, "JVMCI" },
503 { KIND_C1, "C1" },
504 { KIND_C2, "C2" },
505 { KIND_ARCH, "ARCH" },
506 { KIND_PLATFORM_DEPENDENT, "pd" },
507 { KIND_PRODUCT, "product" },
508 { KIND_MANAGEABLE, "manageable" },
509 { KIND_DIAGNOSTIC, "diagnostic" },
510 { KIND_EXPERIMENTAL, "experimental" },
511 { KIND_NOT_PRODUCT, "notproduct" },
512 { KIND_DEVELOP, "develop" },
513 { KIND_LP64_PRODUCT, "lp64_product" },
514 { KIND_READ_WRITE, "rw" },
515 { -1, "" }
516 };
517
518 if ((_flags & KIND_MASK) != 0) {
519 bool is_first = true;
520 const size_t buffer_size = 64;
521 size_t buffer_used = 0;
522 char kind[buffer_size];
523
524 jio_snprintf(kind, buffer_size, "{");
525 buffer_used++;
526 for (int i = 0; data[i].flag != -1; i++) {
527 Data d = data[i];
528 if ((_flags & d.flag) != 0) {
529 if (is_first) {
530 is_first = false;
531 } else {
532 assert(buffer_used + 1 < buffer_size, "Too small buffer");
533 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, " ");
534 buffer_used++;
535 }
536 size_t length = strlen(d.name);
537 assert(buffer_used + length < buffer_size, "Too small buffer");
538 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "%s", d.name);
539 buffer_used += length;
540 }
541 }
542 assert(buffer_used + 2 <= buffer_size, "Too small buffer");
543 jio_snprintf(kind + buffer_used, buffer_size - buffer_used, "}");
544 st->print("%*s", width, kind);
545 }
546 }
547
548 void JVMFlag::print_origin(outputStream* st, unsigned int width) {
549 int origin = _flags & VALUE_ORIGIN_MASK;
550 st->print("{");
551 switch(origin) {
552 case DEFAULT:
553 st->print("default"); break;
554 case COMMAND_LINE:
555 st->print("command line"); break;
556 case ENVIRON_VAR:
557 st->print("environment"); break;
558 case CONFIG_FILE:
559 st->print("config file"); break;
560 case MANAGEMENT:
561 st->print("management"); break;
562 case ERGONOMIC:
563 if (_flags & ORIG_COMMAND_LINE) {
564 st->print("command line, ");
565 }
566 st->print("ergonomic"); break;
567 case ATTACH_ON_DEMAND:
568 st->print("attach"); break;
569 case INTERNAL:
570 st->print("internal"); break;
571 case JIMAGE_RESOURCE:
572 st->print("jimage"); break;
573 }
574 st->print("}");
575 }
576
577 void JVMFlag::print_as_flag(outputStream* st) {
578 if (is_bool()) {
579 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
580 } else if (is_int()) {
581 st->print("-XX:%s=%d", _name, get_int());
582 } else if (is_uint()) {
583 st->print("-XX:%s=%u", _name, get_uint());
584 } else if (is_intx()) {
585 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
586 } else if (is_uintx()) {
587 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
588 } else if (is_uint64_t()) {
589 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
590 } else if (is_size_t()) {
591 st->print("-XX:%s=" SIZE_FORMAT, _name, get_size_t());
592 } else if (is_double()) {
593 st->print("-XX:%s=%f", _name, get_double());
594 } else if (is_ccstr()) {
595 st->print("-XX:%s=", _name);
596 const char* cp = get_ccstr();
597 if (cp != NULL) {
598 // Need to turn embedded '\n's back into separate arguments
599 // Not so efficient to print one character at a time,
600 // but the choice is to do the transformation to a buffer
601 // and print that. And this need not be efficient.
602 for (; *cp != '\0'; cp += 1) {
603 switch (*cp) {
604 default:
605 st->print("%c", *cp);
606 break;
607 case '\n':
608 st->print(" -XX:%s=", _name);
609 break;
610 }
611 }
612 }
613 } else {
614 ShouldNotReachHere();
615 }
616 }
617
618 const char* JVMFlag::flag_error_str(JVMFlag::Error error) {
619 switch (error) {
620 case JVMFlag::MISSING_NAME: return "MISSING_NAME";
621 case JVMFlag::MISSING_VALUE: return "MISSING_VALUE";
622 case JVMFlag::NON_WRITABLE: return "NON_WRITABLE";
623 case JVMFlag::OUT_OF_BOUNDS: return "OUT_OF_BOUNDS";
624 case JVMFlag::VIOLATES_CONSTRAINT: return "VIOLATES_CONSTRAINT";
625 case JVMFlag::INVALID_FLAG: return "INVALID_FLAG";
626 case JVMFlag::ERR_OTHER: return "ERR_OTHER";
627 case JVMFlag::SUCCESS: return "SUCCESS";
628 default: ShouldNotReachHere(); return "NULL";
629 }
630 }
631
632 // 4991491 do not "optimize out" the was_set false values: omitting them
633 // tickles a Microsoft compiler bug causing flagTable to be malformed
634
635 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_PRODUCT) },
636 #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) },
637 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_DIAGNOSTIC) },
638 #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) },
639 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_EXPERIMENTAL) },
640 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) JVMFlag::Flags(JVMFlag::DEFAULT | JVMFlag::KIND_MANAGEABLE) },
641 #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) },
642 #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) },
643 #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) },
644 #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) },
645
646 #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) },
647 #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) },
648 #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) },
649 #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) },
650 #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) },
651 #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) },
652 #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) },
653 #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) },
654
655 #ifdef _LP64
656 #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) },
657 #else
658 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
659 #endif // _LP64
660
661 #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) },
662 #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) },
663 #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) },
664 #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) },
665 #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) },
666 #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) },
667 #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) },
668
669 #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) },
670 #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) },
671 #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) },
672 #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) },
673 #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) },
674 #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) },
675 #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) },
676 #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) },
677
678 #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) },
679 #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) },
680 #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) },
681 #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) },
682 #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) },
683
684 static JVMFlag flagTable[] = {
685 VM_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
686 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
687 RUNTIME_PRODUCT_FLAG_STRUCT, \
688 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
689 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
690 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
691 RUNTIME_EXPERIMENTAL_FLAG_STRUCT, \
692 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
693 RUNTIME_MANAGEABLE_FLAG_STRUCT, \
694 RUNTIME_PRODUCT_RW_FLAG_STRUCT, \
695 RUNTIME_LP64_PRODUCT_FLAG_STRUCT, \
696 IGNORE_RANGE, \
697 IGNORE_CONSTRAINT)
698
699 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, \
700 RUNTIME_PD_DEVELOP_FLAG_STRUCT, \
701 RUNTIME_PRODUCT_FLAG_STRUCT, \
702 RUNTIME_PD_PRODUCT_FLAG_STRUCT, \
703 RUNTIME_DIAGNOSTIC_FLAG_STRUCT, \
704 RUNTIME_PD_DIAGNOSTIC_FLAG_STRUCT, \
705 RUNTIME_NOTPRODUCT_FLAG_STRUCT, \
706 IGNORE_RANGE, \
707 IGNORE_CONSTRAINT)
708 #if INCLUDE_JVMCI
709 JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_STRUCT, \
710 JVMCI_PD_DEVELOP_FLAG_STRUCT, \
711 JVMCI_PRODUCT_FLAG_STRUCT, \
712 JVMCI_PD_PRODUCT_FLAG_STRUCT, \
713 JVMCI_DIAGNOSTIC_FLAG_STRUCT, \
714 JVMCI_PD_DIAGNOSTIC_FLAG_STRUCT, \
715 JVMCI_EXPERIMENTAL_FLAG_STRUCT, \
716 JVMCI_NOTPRODUCT_FLAG_STRUCT, \
717 IGNORE_RANGE, \
718 IGNORE_CONSTRAINT)
719 #endif // INCLUDE_JVMCI
720 #ifdef COMPILER1
721 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, \
722 C1_PD_DEVELOP_FLAG_STRUCT, \
723 C1_PRODUCT_FLAG_STRUCT, \
724 C1_PD_PRODUCT_FLAG_STRUCT, \
725 C1_DIAGNOSTIC_FLAG_STRUCT, \
726 C1_PD_DIAGNOSTIC_FLAG_STRUCT, \
727 C1_NOTPRODUCT_FLAG_STRUCT, \
728 IGNORE_RANGE, \
729 IGNORE_CONSTRAINT)
730 #endif // COMPILER1
731 #ifdef COMPILER2
732 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, \
733 C2_PD_DEVELOP_FLAG_STRUCT, \
734 C2_PRODUCT_FLAG_STRUCT, \
735 C2_PD_PRODUCT_FLAG_STRUCT, \
736 C2_DIAGNOSTIC_FLAG_STRUCT, \
737 C2_PD_DIAGNOSTIC_FLAG_STRUCT, \
738 C2_EXPERIMENTAL_FLAG_STRUCT, \
739 C2_NOTPRODUCT_FLAG_STRUCT, \
740 IGNORE_RANGE, \
741 IGNORE_CONSTRAINT)
742 #endif // COMPILER2
743 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, \
744 ARCH_PRODUCT_FLAG_STRUCT, \
745 ARCH_DIAGNOSTIC_FLAG_STRUCT, \
746 ARCH_EXPERIMENTAL_FLAG_STRUCT, \
747 ARCH_NOTPRODUCT_FLAG_STRUCT, \
748 IGNORE_RANGE, \
749 IGNORE_CONSTRAINT)
750 {0, NULL, NULL}
751 };
752
753 JVMFlag* JVMFlag::flags = flagTable;
754 size_t JVMFlag::numFlags = (sizeof(flagTable) / sizeof(JVMFlag));
755
756 inline bool str_equal(const char* s, size_t s_len, const char* q, size_t q_len) {
757 if (s_len != q_len) return false;
758 return memcmp(s, q, q_len) == 0;
759 }
760
761 // Search the flag table for a named flag
762 JVMFlag* JVMFlag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
763 for (JVMFlag* current = &flagTable[0]; current->_name != NULL; current++) {
764 if (str_equal(current->_name, current->get_name_length(), name, length)) {
765 // Found a matching entry.
766 // Don't report notproduct and develop flags in product builds.
767 if (current->is_constant_in_binary()) {
768 return (return_flag ? current : NULL);
769 }
770 // Report locked flags only if allowed.
771 if (!(current->is_unlocked() || current->is_unlocker())) {
772 if (!allow_locked) {
773 // disable use of locked flags, e.g. diagnostic, experimental,
774 // etc. until they are explicitly unlocked
775 return NULL;
776 }
777 }
778 return current;
779 }
780 }
781 // JVMFlag name is not in the flag table
782 return NULL;
783 }
784
785 // Get or compute the flag name length
786 size_t JVMFlag::get_name_length() {
787 if (_name_len == 0) {
788 _name_len = strlen(_name);
789 }
790 return _name_len;
791 }
792
793 JVMFlag* JVMFlag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
794 float VMOptionsFuzzyMatchSimilarity = 0.7f;
795 JVMFlag* match = NULL;
796 float score;
797 float max_score = -1;
798
799 for (JVMFlag* current = &flagTable[0]; current->_name != NULL; current++) {
800 score = StringUtils::similarity(current->_name, strlen(current->_name), name, length);
801 if (score > max_score) {
802 max_score = score;
803 match = current;
804 }
805 }
806
807 if (match == NULL) {
808 return NULL;
809 }
810
811 if (!(match->is_unlocked() || match->is_unlocker())) {
812 if (!allow_locked) {
813 return NULL;
814 }
815 }
816
817 if (max_score < VMOptionsFuzzyMatchSimilarity) {
818 return NULL;
819 }
820
821 return match;
822 }
823
824 // Returns the address of the index'th element
825 JVMFlag* JVMFlagEx::flag_from_enum(JVMFlagsEnum flag) {
826 assert((size_t)flag < JVMFlag::numFlags, "bad command line flag index");
827 return &JVMFlag::flags[flag];
828 }
829
830 bool JVMFlagEx::is_default(JVMFlagsEnum flag) {
831 return flag_from_enum(flag)->is_default();
832 }
833
834 bool JVMFlagEx::is_ergo(JVMFlagsEnum flag) {
835 return flag_from_enum(flag)->is_ergonomic();
836 }
837
838 bool JVMFlagEx::is_cmdline(JVMFlagsEnum flag) {
839 return flag_from_enum(flag)->is_command_line();
840 }
841
842 void JVMFlagEx::setOnCmdLine(JVMFlagsEnum flag) {
843 JVMFlag* faddr = flag_from_enum(flag);
844 assert(faddr != NULL, "Unknown flag");
845 faddr->set_command_line();
846 }
847
848 template<class E, class T>
849 static void trace_flag_changed(const JVMFlag* flag, const T old_value, const T new_value, const JVMFlag::Flags origin) {
850 E e;
851 e.set_name(flag->_name);
852 e.set_oldValue(old_value);
853 e.set_newValue(new_value);
854 e.set_origin(origin);
855 e.commit();
856 }
857
858 static JVMFlag::Error apply_constraint_and_check_range_bool(const JVMFlag* flag, bool new_value, bool verbose) {
859 JVMFlag::Error status = JVMFlag::SUCCESS;
860 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
861 if (constraint != NULL) {
862 status = constraint->apply_bool(new_value, verbose);
863 }
864 return status;
865 }
866
867 JVMFlag::Error JVMFlag::boolAt(const JVMFlag* flag, bool* value) {
868 if (flag == NULL) return JVMFlag::INVALID_FLAG;
869 if (!flag->is_bool()) return JVMFlag::WRONG_FORMAT;
870 *value = flag->get_bool();
871 return JVMFlag::SUCCESS;
872 }
873
874 JVMFlag::Error JVMFlag::boolAtPut(JVMFlag* flag, bool* value, JVMFlag::Flags origin) {
875 if (flag == NULL) return JVMFlag::INVALID_FLAG;
876 if (!flag->is_bool()) return JVMFlag::WRONG_FORMAT;
877 JVMFlag::Error check = apply_constraint_and_check_range_bool(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
878 if (check != JVMFlag::SUCCESS) return check;
879 bool old_value = flag->get_bool();
880 trace_flag_changed<EventBooleanFlagChanged, bool>(flag, old_value, *value, origin);
881 flag->set_bool(*value);
882 *value = old_value;
883 flag->set_origin(origin);
884 return JVMFlag::SUCCESS;
885 }
886
887 JVMFlag::Error JVMFlagEx::boolAtPut(JVMFlagsEnum flag, bool value, JVMFlag::Flags origin) {
888 JVMFlag* faddr = flag_from_enum(flag);
889 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
890 return JVMFlag::boolAtPut(faddr, &value, origin);
891 }
892
893 static JVMFlag::Error apply_constraint_and_check_range_int(const JVMFlag* flag, int new_value, bool verbose) {
894 JVMFlag::Error status = JVMFlag::SUCCESS;
895 JVMFlagRange* range = JVMFlagRangeList::find(flag);
896 if (range != NULL) {
897 status = range->check_int(new_value, verbose);
898 }
899 if (status == JVMFlag::SUCCESS) {
900 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
901 if (constraint != NULL) {
902 status = constraint->apply_int(new_value, verbose);
903 }
904 }
905 return status;
906 }
907
908 JVMFlag::Error JVMFlag::intAt(const JVMFlag* flag, int* value) {
909 if (flag == NULL) return JVMFlag::INVALID_FLAG;
910 if (!flag->is_int()) return JVMFlag::WRONG_FORMAT;
911 *value = flag->get_int();
912 return JVMFlag::SUCCESS;
913 }
914
915 JVMFlag::Error JVMFlag::intAtPut(JVMFlag* flag, int* value, JVMFlag::Flags origin) {
916 if (flag == NULL) return JVMFlag::INVALID_FLAG;
917 if (!flag->is_int()) return JVMFlag::WRONG_FORMAT;
918 JVMFlag::Error check = apply_constraint_and_check_range_int(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
919 if (check != JVMFlag::SUCCESS) return check;
920 int old_value = flag->get_int();
921 trace_flag_changed<EventIntFlagChanged, s4>(flag, old_value, *value, origin);
922 flag->set_int(*value);
923 *value = old_value;
924 flag->set_origin(origin);
925 return JVMFlag::SUCCESS;
926 }
927
928 JVMFlag::Error JVMFlagEx::intAtPut(JVMFlagsEnum flag, int value, JVMFlag::Flags origin) {
929 JVMFlag* faddr = flag_from_enum(flag);
930 guarantee(faddr != NULL && faddr->is_int(), "wrong flag type");
931 return JVMFlag::intAtPut(faddr, &value, origin);
932 }
933
934 static JVMFlag::Error apply_constraint_and_check_range_uint(const JVMFlag* flag, uint new_value, bool verbose) {
935 JVMFlag::Error status = JVMFlag::SUCCESS;
936 JVMFlagRange* range = JVMFlagRangeList::find(flag);
937 if (range != NULL) {
938 status = range->check_uint(new_value, verbose);
939 }
940 if (status == JVMFlag::SUCCESS) {
941 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
942 if (constraint != NULL) {
943 status = constraint->apply_uint(new_value, verbose);
944 }
945 }
946 return status;
947 }
948
949 JVMFlag::Error JVMFlag::uintAt(const JVMFlag* flag, uint* value) {
950 if (flag == NULL) return JVMFlag::INVALID_FLAG;
951 if (!flag->is_uint()) return JVMFlag::WRONG_FORMAT;
952 *value = flag->get_uint();
953 return JVMFlag::SUCCESS;
954 }
955
956 JVMFlag::Error JVMFlag::uintAtPut(JVMFlag* flag, uint* value, JVMFlag::Flags origin) {
957 if (flag == NULL) return JVMFlag::INVALID_FLAG;
958 if (!flag->is_uint()) return JVMFlag::WRONG_FORMAT;
959 JVMFlag::Error check = apply_constraint_and_check_range_uint(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
960 if (check != JVMFlag::SUCCESS) return check;
961 uint old_value = flag->get_uint();
962 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(flag, old_value, *value, origin);
963 flag->set_uint(*value);
964 *value = old_value;
965 flag->set_origin(origin);
966 return JVMFlag::SUCCESS;
967 }
968
969 JVMFlag::Error JVMFlagEx::uintAtPut(JVMFlagsEnum flag, uint value, JVMFlag::Flags origin) {
970 JVMFlag* faddr = flag_from_enum(flag);
971 guarantee(faddr != NULL && faddr->is_uint(), "wrong flag type");
972 return JVMFlag::uintAtPut(faddr, &value, origin);
973 }
974
975 JVMFlag::Error JVMFlag::intxAt(const JVMFlag* flag, intx* value) {
976 if (flag == NULL) return JVMFlag::INVALID_FLAG;
977 if (!flag->is_intx()) return JVMFlag::WRONG_FORMAT;
978 *value = flag->get_intx();
979 return JVMFlag::SUCCESS;
980 }
981
982 static JVMFlag::Error apply_constraint_and_check_range_intx(const JVMFlag* flag, intx new_value, bool verbose) {
983 JVMFlag::Error status = JVMFlag::SUCCESS;
984 JVMFlagRange* range = JVMFlagRangeList::find(flag);
985 if (range != NULL) {
986 status = range->check_intx(new_value, verbose);
987 }
988 if (status == JVMFlag::SUCCESS) {
989 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
990 if (constraint != NULL) {
991 status = constraint->apply_intx(new_value, verbose);
992 }
993 }
994 return status;
995 }
996
997 JVMFlag::Error JVMFlag::intxAtPut(JVMFlag* flag, intx* value, JVMFlag::Flags origin) {
998 if (flag == NULL) return JVMFlag::INVALID_FLAG;
999 if (!flag->is_intx()) return JVMFlag::WRONG_FORMAT;
1000 JVMFlag::Error check = apply_constraint_and_check_range_intx(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
1001 if (check != JVMFlag::SUCCESS) return check;
1002 intx old_value = flag->get_intx();
1003 trace_flag_changed<EventLongFlagChanged, intx>(flag, old_value, *value, origin);
1004 flag->set_intx(*value);
1005 *value = old_value;
1006 flag->set_origin(origin);
1007 return JVMFlag::SUCCESS;
1008 }
1009
1010 JVMFlag::Error JVMFlagEx::intxAtPut(JVMFlagsEnum flag, intx value, JVMFlag::Flags origin) {
1011 JVMFlag* faddr = flag_from_enum(flag);
1012 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
1013 return JVMFlag::intxAtPut(faddr, &value, origin);
1014 }
1015
1016 JVMFlag::Error JVMFlag::uintxAt(const JVMFlag* flag, uintx* value) {
1017 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1018 if (!flag->is_uintx()) return JVMFlag::WRONG_FORMAT;
1019 *value = flag->get_uintx();
1020 return JVMFlag::SUCCESS;
1021 }
1022
1023 static JVMFlag::Error apply_constraint_and_check_range_uintx(const JVMFlag* flag, uintx new_value, bool verbose) {
1024 JVMFlag::Error status = JVMFlag::SUCCESS;
1025 JVMFlagRange* range = JVMFlagRangeList::find(flag);
1026 if (range != NULL) {
1027 status = range->check_uintx(new_value, verbose);
1028 }
1029 if (status == JVMFlag::SUCCESS) {
1030 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
1031 if (constraint != NULL) {
1032 status = constraint->apply_uintx(new_value, verbose);
1033 }
1034 }
1035 return status;
1036 }
1037
1038 JVMFlag::Error JVMFlag::uintxAtPut(JVMFlag* flag, uintx* value, JVMFlag::Flags origin) {
1039 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1040 if (!flag->is_uintx()) return JVMFlag::WRONG_FORMAT;
1041 JVMFlag::Error check = apply_constraint_and_check_range_uintx(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
1042 if (check != JVMFlag::SUCCESS) return check;
1043 uintx old_value = flag->get_uintx();
1044 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(flag, old_value, *value, origin);
1045 flag->set_uintx(*value);
1046 *value = old_value;
1047 flag->set_origin(origin);
1048 return JVMFlag::SUCCESS;
1049 }
1050
1051 JVMFlag::Error JVMFlagEx::uintxAtPut(JVMFlagsEnum flag, uintx value, JVMFlag::Flags origin) {
1052 JVMFlag* faddr = flag_from_enum(flag);
1053 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
1054 return JVMFlag::uintxAtPut(faddr, &value, origin);
1055 }
1056
1057 JVMFlag::Error JVMFlag::uint64_tAt(const JVMFlag* flag, uint64_t* value) {
1058 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1059 if (!flag->is_uint64_t()) return JVMFlag::WRONG_FORMAT;
1060 *value = flag->get_uint64_t();
1061 return JVMFlag::SUCCESS;
1062 }
1063
1064 static JVMFlag::Error apply_constraint_and_check_range_uint64_t(const JVMFlag* flag, uint64_t new_value, bool verbose) {
1065 JVMFlag::Error status = JVMFlag::SUCCESS;
1066 JVMFlagRange* range = JVMFlagRangeList::find(flag);
1067 if (range != NULL) {
1068 status = range->check_uint64_t(new_value, verbose);
1069 }
1070 if (status == JVMFlag::SUCCESS) {
1071 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
1072 if (constraint != NULL) {
1073 status = constraint->apply_uint64_t(new_value, verbose);
1074 }
1075 }
1076 return status;
1077 }
1078
1079 JVMFlag::Error JVMFlag::uint64_tAtPut(JVMFlag* flag, uint64_t* value, JVMFlag::Flags origin) {
1080 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1081 if (!flag->is_uint64_t()) return JVMFlag::WRONG_FORMAT;
1082 JVMFlag::Error check = apply_constraint_and_check_range_uint64_t(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
1083 if (check != JVMFlag::SUCCESS) return check;
1084 uint64_t old_value = flag->get_uint64_t();
1085 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(flag, old_value, *value, origin);
1086 flag->set_uint64_t(*value);
1087 *value = old_value;
1088 flag->set_origin(origin);
1089 return JVMFlag::SUCCESS;
1090 }
1091
1092 JVMFlag::Error JVMFlagEx::uint64_tAtPut(JVMFlagsEnum flag, uint64_t value, JVMFlag::Flags origin) {
1093 JVMFlag* faddr = flag_from_enum(flag);
1094 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
1095 return JVMFlag::uint64_tAtPut(faddr, &value, origin);
1096 }
1097
1098 JVMFlag::Error JVMFlag::size_tAt(const JVMFlag* flag, size_t* value) {
1099 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1100 if (!flag->is_size_t()) return JVMFlag::WRONG_FORMAT;
1101 *value = flag->get_size_t();
1102 return JVMFlag::SUCCESS;
1103 }
1104
1105 static JVMFlag::Error apply_constraint_and_check_range_size_t(const JVMFlag* flag, size_t new_value, bool verbose) {
1106 JVMFlag::Error status = JVMFlag::SUCCESS;
1107 JVMFlagRange* range = JVMFlagRangeList::find(flag);
1108 if (range != NULL) {
1109 status = range->check_size_t(new_value, verbose);
1110 }
1111 if (status == JVMFlag::SUCCESS) {
1112 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
1113 if (constraint != NULL) {
1114 status = constraint->apply_size_t(new_value, verbose);
1115 }
1116 }
1117 return status;
1118 }
1119
1120
1121 JVMFlag::Error JVMFlag::size_tAtPut(JVMFlag* flag, size_t* value, JVMFlag::Flags origin) {
1122 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1123 if (!flag->is_size_t()) return JVMFlag::WRONG_FORMAT;
1124 JVMFlag::Error check = apply_constraint_and_check_range_size_t(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
1125 if (check != JVMFlag::SUCCESS) return check;
1126 size_t old_value = flag->get_size_t();
1127 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(flag, old_value, *value, origin);
1128 flag->set_size_t(*value);
1129 *value = old_value;
1130 flag->set_origin(origin);
1131 return JVMFlag::SUCCESS;
1132 }
1133
1134 JVMFlag::Error JVMFlagEx::size_tAtPut(JVMFlagsEnum flag, size_t value, JVMFlag::Flags origin) {
1135 JVMFlag* faddr = flag_from_enum(flag);
1136 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type");
1137 return JVMFlag::size_tAtPut(faddr, &value, origin);
1138 }
1139
1140 JVMFlag::Error JVMFlag::doubleAt(const JVMFlag* flag, double* value) {
1141 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1142 if (!flag->is_double()) return JVMFlag::WRONG_FORMAT;
1143 *value = flag->get_double();
1144 return JVMFlag::SUCCESS;
1145 }
1146
1147 static JVMFlag::Error apply_constraint_and_check_range_double(const JVMFlag* flag, double new_value, bool verbose) {
1148 JVMFlag::Error status = JVMFlag::SUCCESS;
1149 JVMFlagRange* range = JVMFlagRangeList::find(flag);
1150 if (range != NULL) {
1151 status = range->check_double(new_value, verbose);
1152 }
1153 if (status == JVMFlag::SUCCESS) {
1154 JVMFlagConstraint* constraint = JVMFlagConstraintList::find_if_needs_check(flag);
1155 if (constraint != NULL) {
1156 status = constraint->apply_double(new_value, verbose);
1157 }
1158 }
1159 return status;
1160 }
1161
1162 JVMFlag::Error JVMFlag::doubleAtPut(JVMFlag* flag, double* value, JVMFlag::Flags origin) {
1163 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1164 if (!flag->is_double()) return JVMFlag::WRONG_FORMAT;
1165 JVMFlag::Error check = apply_constraint_and_check_range_double(flag, *value, !JVMFlagConstraintList::validated_after_ergo());
1166 if (check != JVMFlag::SUCCESS) return check;
1167 double old_value = flag->get_double();
1168 trace_flag_changed<EventDoubleFlagChanged, double>(flag, old_value, *value, origin);
1169 flag->set_double(*value);
1170 *value = old_value;
1171 flag->set_origin(origin);
1172 return JVMFlag::SUCCESS;
1173 }
1174
1175 JVMFlag::Error JVMFlagEx::doubleAtPut(JVMFlagsEnum flag, double value, JVMFlag::Flags origin) {
1176 JVMFlag* faddr = flag_from_enum(flag);
1177 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
1178 return JVMFlag::doubleAtPut(faddr, &value, origin);
1179 }
1180
1181 JVMFlag::Error JVMFlag::ccstrAt(const JVMFlag* flag, ccstr* value) {
1182 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1183 if (!flag->is_ccstr()) return JVMFlag::WRONG_FORMAT;
1184 *value = flag->get_ccstr();
1185 return JVMFlag::SUCCESS;
1186 }
1187
1188 JVMFlag::Error JVMFlag::ccstrAtPut(JVMFlag* flag, ccstr* value, JVMFlag::Flags origin) {
1189 if (flag == NULL) return JVMFlag::INVALID_FLAG;
1190 if (!flag->is_ccstr()) return JVMFlag::WRONG_FORMAT;
1191 ccstr old_value = flag->get_ccstr();
1192 trace_flag_changed<EventStringFlagChanged, const char*>(flag, old_value, *value, origin);
1193 char* new_value = NULL;
1194 if (*value != NULL) {
1195 new_value = os::strdup_check_oom(*value);
1196 }
1197 flag->set_ccstr(new_value);
1198 if (flag->is_default() && old_value != NULL) {
1199 // Prior value is NOT heap allocated, but was a literal constant.
1200 old_value = os::strdup_check_oom(old_value);
1201 }
1202 *value = old_value;
1203 flag->set_origin(origin);
1204 return JVMFlag::SUCCESS;
1205 }
1206
1207 JVMFlag::Error JVMFlagEx::ccstrAtPut(JVMFlagsEnum flag, ccstr value, JVMFlag::Flags origin) {
1208 JVMFlag* faddr = flag_from_enum(flag);
1209 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
1210 ccstr old_value = faddr->get_ccstr();
1211 trace_flag_changed<EventStringFlagChanged, const char*>(faddr, old_value, value, origin);
1212 char* new_value = os::strdup_check_oom(value);
1213 faddr->set_ccstr(new_value);
1214 if (!faddr->is_default() && old_value != NULL) {
1215 // Prior value is heap allocated so free it.
1216 FREE_C_HEAP_ARRAY(char, old_value);
1217 }
1218 faddr->set_origin(origin);
1219 return JVMFlag::SUCCESS;
1220 }
1221
1222 extern "C" {
1223 static int compare_flags(const void* void_a, const void* void_b) {
1224 return strcmp((*((JVMFlag**) void_a))->_name, (*((JVMFlag**) void_b))->_name);
1225 }
1226 }
1227
1228 void JVMFlag::printSetFlags(outputStream* out) {
1229 // Print which flags were set on the command line
1230 // note: this method is called before the thread structure is in place
1231 // which means resource allocation cannot be used.
1232
1233 // The last entry is the null entry.
1234 const size_t length = JVMFlag::numFlags - 1;
1235
1236 // Sort
1237 JVMFlag** array = NEW_C_HEAP_ARRAY(JVMFlag*, length, mtArguments);
1238 for (size_t i = 0; i < length; i++) {
1239 array[i] = &flagTable[i];
1240 }
1241 qsort(array, length, sizeof(JVMFlag*), compare_flags);
1242
1243 // Print
1244 for (size_t i = 0; i < length; i++) {
1245 if (array[i]->get_origin() /* naked field! */) {
1246 array[i]->print_as_flag(out);
1247 out->print(" ");
1248 }
1249 }
1250 out->cr();
1251 FREE_C_HEAP_ARRAY(JVMFlag*, array);
1252 }
1253
1254 #ifndef PRODUCT
1255
1256 void JVMFlag::verify() {
1257 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
1258 }
1259
1260 #endif // PRODUCT
1261
1262 void JVMFlag::printFlags(outputStream* out, bool withComments, bool printRanges, bool skipDefaults) {
1263 // Print the flags sorted by name
1264 // Note: This method may be called before the thread structure is in place
1265 // which means resource allocation cannot be used. Also, it may be
1266 // called as part of error reporting, so handle native OOMs gracefully.
1267
1268 // The last entry is the null entry.
1269 const size_t length = JVMFlag::numFlags - 1;
1270
1271 // Print
1272 if (!printRanges) {
1273 out->print_cr("[Global flags]");
1274 } else {
1275 out->print_cr("[Global flags ranges]");
1276 }
1277
1278 // Sort
1279 JVMFlag** array = NEW_C_HEAP_ARRAY_RETURN_NULL(JVMFlag*, length, mtArguments);
1280 if (array != NULL) {
1281 for (size_t i = 0; i < length; i++) {
1282 array[i] = &flagTable[i];
1283 }
1284 qsort(array, length, sizeof(JVMFlag*), compare_flags);
1285
1286 for (size_t i = 0; i < length; i++) {
1287 if (array[i]->is_unlocked() && !(skipDefaults && array[i]->is_default())) {
1288 array[i]->print_on(out, withComments, printRanges);
1289 }
1290 }
1291 FREE_C_HEAP_ARRAY(JVMFlag*, array);
1292 } else {
1293 // OOM? Print unsorted.
1294 for (size_t i = 0; i < length; i++) {
1295 if (flagTable[i].is_unlocked() && !(skipDefaults && flagTable[i].is_default())) {
1296 flagTable[i].print_on(out, withComments, printRanges);
1297 }
1298 }
1299 }
1300 }
1301
1302 void JVMFlag::printError(bool verbose, const char* msg, ...) {
1303 if (verbose) {
1304 va_list listPointer;
1305 va_start(listPointer, msg);
1306 jio_vfprintf(defaultStream::error_stream(), msg, listPointer);
1307 va_end(listPointer);
1308 }
1309 }