1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "memory/allocation.inline.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #include "runtime/globals.hpp"
30 #include "runtime/globals_extension.hpp"
31 #include "utilities/ostream.hpp"
32 #include "utilities/macros.hpp"
33 #include "utilities/top.hpp"
34 #if INCLUDE_ALL_GCS
35 #include "gc_implementation/g1/g1_globals.hpp"
36 #endif // INCLUDE_ALL_GCS
37 #ifdef COMPILER1
38 #include "c1/c1_globals.hpp"
39 #endif
40 #ifdef COMPILER2
41 #include "opto/c2_globals.hpp"
42 #endif
43 #ifdef SHARK
44 #include "shark/shark_globals.hpp"
45 #endif
46
47 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
48 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
49 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
50 MATERIALIZE_NOTPRODUCT_FLAG, \
51 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
52 MATERIALIZE_LP64_PRODUCT_FLAG)
53
54 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
55 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
56 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
57
58 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
59 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
60 MATERIALIZE_NOTPRODUCT_FLAG)
61
62 MATERIALIZE_FLAGS_EXT
63
64
65 void Flag::check_writable() {
66 if (is_constant_in_binary()) {
67 fatal(err_msg("flag is constant: %s", _name));
68 }
69 }
70
71 bool Flag::is_bool() const {
72 return strcmp(_type, "bool") == 0;
73 }
74
75 bool Flag::get_bool() const {
76 return *((bool*) _addr);
77 }
78
79 void Flag::set_bool(bool value) {
80 check_writable();
81 *((bool*) _addr) = value;
82 }
83
84 bool Flag::is_intx() const {
85 return strcmp(_type, "intx") == 0;
86 }
87
88 intx Flag::get_intx() const {
89 return *((intx*) _addr);
90 }
91
92 void Flag::set_intx(intx value) {
93 check_writable();
94 *((intx*) _addr) = value;
95 }
96
97 bool Flag::is_uintx() const {
98 return strcmp(_type, "uintx") == 0;
99 }
100
101 uintx Flag::get_uintx() const {
102 return *((uintx*) _addr);
103 }
104
105 void Flag::set_uintx(uintx value) {
106 check_writable();
107 *((uintx*) _addr) = value;
108 }
109
110 bool Flag::is_uint64_t() const {
111 return strcmp(_type, "uint64_t") == 0;
112 }
113
114 uint64_t Flag::get_uint64_t() const {
115 return *((uint64_t*) _addr);
116 }
117
118 void Flag::set_uint64_t(uint64_t value) {
119 check_writable();
120 *((uint64_t*) _addr) = value;
121 }
122
123 bool Flag::is_double() const {
124 return strcmp(_type, "double") == 0;
125 }
126
127 double Flag::get_double() const {
128 return *((double*) _addr);
129 }
130
131 void Flag::set_double(double value) {
132 check_writable();
133 *((double*) _addr) = value;
134 }
135
136 bool Flag::is_ccstr() const {
137 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
138 }
139
140 bool Flag::ccstr_accumulates() const {
141 return strcmp(_type, "ccstrlist") == 0;
142 }
143
144 ccstr Flag::get_ccstr() const {
145 return *((ccstr*) _addr);
146 }
147
148 void Flag::set_ccstr(ccstr value) {
149 check_writable();
150 *((ccstr*) _addr) = value;
151 }
152
153
154 Flag::Flags Flag::get_origin() {
155 return Flags(_flags & VALUE_ORIGIN_MASK);
156 }
157
158 void Flag::set_origin(Flags origin) {
159 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
160 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | origin);
161 }
162
163 bool Flag::is_default() {
164 return (get_origin() == DEFAULT);
165 }
166
167 bool Flag::is_ergonomic() {
168 return (get_origin() == ERGONOMIC);
169 }
170
171 bool Flag::is_command_line() {
172 return (get_origin() == COMMAND_LINE);
173 }
174
175 bool Flag::is_product() const {
176 return (_flags & KIND_PRODUCT) != 0;
177 }
178
179 bool Flag::is_manageable() const {
180 return (_flags & KIND_MANAGEABLE) != 0;
181 }
182
183 bool Flag::is_diagnostic() const {
184 return (_flags & KIND_DIAGNOSTIC) != 0;
185 }
186
187 bool Flag::is_experimental() const {
188 return (_flags & KIND_EXPERIMENTAL) != 0;
189 }
190
191 bool Flag::is_notproduct() const {
192 return (_flags & KIND_NOT_PRODUCT) != 0;
193 }
194
195 bool Flag::is_develop() const {
196 return (_flags & KIND_DEVELOP) != 0;
197 }
198
199 bool Flag::is_read_write() const {
200 return (_flags & KIND_READ_WRITE) != 0;
201 }
202
203 bool Flag::is_commercial() const {
204 return (_flags & KIND_COMMERCIAL) != 0;
205 }
206
207 /**
208 * Returns if this flag is a constant in the binary. Right now this is
209 * true for notproduct and develop flags in product builds.
210 */
211 bool Flag::is_constant_in_binary() const {
212 #ifdef PRODUCT
213 return is_notproduct() || is_develop();
214 #else
215 return false;
216 #endif
217 }
218
219 bool Flag::is_unlocker() const {
220 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
221 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
222 is_unlocker_ext();
223 }
224
225 bool Flag::is_unlocked() const {
226 if (is_diagnostic()) {
227 return UnlockDiagnosticVMOptions;
228 }
229 if (is_experimental()) {
230 return UnlockExperimentalVMOptions;
231 }
232 return is_unlocked_ext();
233 }
234
235 // Get custom message for this locked flag, or return NULL if
236 // none is available.
237 void Flag::get_locked_message(char* buf, int buflen) const {
238 get_locked_message_ext(buf, buflen);
239 }
240
241 bool Flag::is_writeable() const {
242 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
243 }
244
245 // All flags except "manageable" are assumed to be internal flags.
246 // Long term, we need to define a mechanism to specify which flags
247 // are external/stable and change this function accordingly.
248 bool Flag::is_external() const {
249 return is_manageable() || is_external_ext();
250 }
251
252
253 // Length of format string (e.g. "%.1234s") for printing ccstr below
254 #define FORMAT_BUFFER_LEN 16
255
256 void Flag::print_on(outputStream* st, bool withComments) {
257 // Don't print notproduct and develop flags in a product build.
258 if (is_constant_in_binary()) {
259 return;
260 }
261
262 st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' '));
263
264 if (is_bool()) {
265 st->print("%-16s", get_bool() ? "true" : "false");
266 }
267 if (is_intx()) {
268 st->print("%-16ld", get_intx());
269 }
270 if (is_uintx()) {
271 st->print("%-16lu", get_uintx());
272 }
273 if (is_uint64_t()) {
274 st->print("%-16lu", get_uint64_t());
275 }
276 if (is_double()) {
277 st->print("%-16f", get_double());
278 }
279 if (is_ccstr()) {
280 const char* cp = get_ccstr();
281 if (cp != NULL) {
282 const char* eol;
283 while ((eol = strchr(cp, '\n')) != NULL) {
284 char format_buffer[FORMAT_BUFFER_LEN];
285 size_t llen = pointer_delta(eol, cp, sizeof(char));
286 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
287 "%%." SIZE_FORMAT "s", llen);
288 st->print(format_buffer, cp);
289 st->cr();
290 cp = eol+1;
291 st->print("%5s %-35s += ", "", _name);
292 }
293 st->print("%-16s", cp);
294 }
295 else st->print("%-16s", "");
296 }
297
298 st->print("%-20");
299 print_kind(st);
300
301 if (withComments) {
302 #ifndef PRODUCT
303 st->print("%s", _doc);
304 #endif
305 }
306 st->cr();
307 }
308
309 void Flag::print_kind(outputStream* st) {
310 struct Data {
311 int flag;
312 const char* name;
313 };
314
315 Data data[] = {
316 { KIND_C1, "C1" },
317 { KIND_C2, "C2" },
318 { KIND_ARCH, "ARCH" },
319 { KIND_SHARK, "SHARK" },
320 { KIND_PLATFORM_DEPENDENT, "pd" },
321 { KIND_PRODUCT, "product" },
322 { KIND_MANAGEABLE, "manageable" },
323 { KIND_DIAGNOSTIC, "diagnostic" },
324 { KIND_EXPERIMENTAL, "experimental" },
325 { KIND_NOT_PRODUCT, "notproduct" },
326 { KIND_DEVELOP, "develop" },
327 { KIND_LP64_PRODUCT, "lp64_product" },
328 { KIND_READ_WRITE, "rw" },
329 { -1, "" }
330 };
331
332 if ((_flags & KIND_MASK) != 0) {
333 st->print("{");
334 bool is_first = true;
335
336 for (int i = 0; data[i].flag != -1; i++) {
337 Data d = data[i];
338 if ((_flags & d.flag) != 0) {
339 if (is_first) {
340 is_first = false;
341 } else {
342 st->print(" ");
343 }
344 st->print(d.name);
345 }
346 }
347
348 st->print("}");
349 }
350 }
351
352 void Flag::print_as_flag(outputStream* st) {
353 if (is_bool()) {
354 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
355 } else if (is_intx()) {
356 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
357 } else if (is_uintx()) {
358 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
359 } else if (is_uint64_t()) {
360 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
361 } else if (is_double()) {
362 st->print("-XX:%s=%f", _name, get_double());
363 } else if (is_ccstr()) {
364 st->print("-XX:%s=", _name);
365 const char* cp = get_ccstr();
366 if (cp != NULL) {
367 // Need to turn embedded '\n's back into separate arguments
368 // Not so efficient to print one character at a time,
369 // but the choice is to do the transformation to a buffer
370 // and print that. And this need not be efficient.
371 for (; *cp != '\0'; cp += 1) {
372 switch (*cp) {
373 default:
374 st->print("%c", *cp);
375 break;
376 case '\n':
377 st->print(" -XX:%s=", _name);
378 break;
379 }
380 }
381 }
382 } else {
383 ShouldNotReachHere();
384 }
385 }
386
387 // 4991491 do not "optimize out" the was_set false values: omitting them
388 // tickles a Microsoft compiler bug causing flagTable to be malformed
389
390 #define NAME(name) NOT_PRODUCT(&name) PRODUCT_ONLY(&CONST_##name)
391
392 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) },
393 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
394 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) },
395 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) },
396 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) },
397 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_READ_WRITE) },
398 #define RUNTIME_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP) },
399 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
400 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_NOT_PRODUCT) },
401
402 #ifdef _LP64
403 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_LP64_PRODUCT) },
404 #else
405 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
406 #endif // _LP64
407
408 #define C1_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT) },
409 #define C1_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
410 #define C1_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DIAGNOSTIC) },
411 #define C1_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP) },
412 #define C1_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
413 #define C1_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_NOT_PRODUCT) },
414
415 #define C2_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT) },
416 #define C2_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
417 #define C2_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC) },
418 #define C2_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_EXPERIMENTAL) },
419 #define C2_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP) },
420 #define C2_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
421 #define C2_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_NOT_PRODUCT) },
422
423 #define ARCH_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_PRODUCT) },
424 #define ARCH_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DIAGNOSTIC) },
425 #define ARCH_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_EXPERIMENTAL) },
426 #define ARCH_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DEVELOP) },
427 #define ARCH_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_NOT_PRODUCT) },
428
429 #define SHARK_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT) },
430 #define SHARK_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
431 #define SHARK_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DIAGNOSTIC) },
432 #define SHARK_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP) },
433 #define SHARK_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
434 #define SHARK_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_NOT_PRODUCT) },
435
436 static Flag flagTable[] = {
437 RUNTIME_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT, RUNTIME_LP64_PRODUCT_FLAG_STRUCT)
438 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT)
439 #if INCLUDE_ALL_GCS
440 G1_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT)
441 #endif // INCLUDE_ALL_GCS
442 #ifdef COMPILER1
443 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_DIAGNOSTIC_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
444 #endif
445 #ifdef COMPILER2
446 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, C2_PD_DEVELOP_FLAG_STRUCT, C2_PRODUCT_FLAG_STRUCT, C2_PD_PRODUCT_FLAG_STRUCT, C2_DIAGNOSTIC_FLAG_STRUCT, C2_EXPERIMENTAL_FLAG_STRUCT, C2_NOTPRODUCT_FLAG_STRUCT)
447 #endif
448 #ifdef SHARK
449 SHARK_FLAGS(SHARK_DEVELOP_FLAG_STRUCT, SHARK_PD_DEVELOP_FLAG_STRUCT, SHARK_PRODUCT_FLAG_STRUCT, SHARK_PD_PRODUCT_FLAG_STRUCT, SHARK_DIAGNOSTIC_FLAG_STRUCT, SHARK_NOTPRODUCT_FLAG_STRUCT)
450 #endif
451 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
452 FLAGTABLE_EXT
453 {0, NULL, NULL}
454 };
455
456 Flag* Flag::flags = flagTable;
457 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
458
459 inline bool str_equal(const char* s, const char* q, size_t len) {
460 // s is null terminated, q is not!
461 if (strlen(s) != (unsigned int) len) return false;
462 return strncmp(s, q, len) == 0;
463 }
464
465 // Search the flag table for a named flag
466 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked) {
467 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
468 if (str_equal(current->_name, name, length)) {
469 // Found a matching entry.
470 // Don't report notproduct and develop flags in product builds.
471 if (current->is_constant_in_binary()) {
472 return NULL;
473 }
474 // Report locked flags only if allowed.
475 if (!(current->is_unlocked() || current->is_unlocker())) {
476 if (!allow_locked) {
477 // disable use of locked flags, e.g. diagnostic, experimental,
478 // commercial... until they are explicitly unlocked
479 return NULL;
480 }
481 }
482 return current;
483 }
484 }
485 // Flag name is not in the flag table
486 return NULL;
487 }
488
489 // Compute string similarity based on Dice's coefficient
490 static float str_similar(const char* str1, const char* str2, size_t len2) {
491 int len1 = (int) strlen(str1);
492 int total = len1 + (int) len2;
493
494 int hit = 0;
495
496 for (int i = 0; i < len1 -1; ++i) {
497 for (int j = 0; j < (int) len2 -1; ++j) {
498 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
499 ++hit;
500 break;
501 }
502 }
503 }
504
505 return 2.0f * (float) hit / (float) total;
506 }
507
508 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
509 float VMOptionsFuzzyMatchSimilarity = 0.7f;
510 Flag* match = NULL;
511 float score;
512 float max_score = -1;
513
514 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
515 score = str_similar(current->_name, name, length);
516 if (score > max_score) {
517 max_score = score;
518 match = current;
519 }
520 }
521
522 if (!(match->is_unlocked() || match->is_unlocker())) {
523 if (!allow_locked) {
524 return NULL;
525 }
526 }
527
528 if (max_score < VMOptionsFuzzyMatchSimilarity) {
529 return NULL;
530 }
531
532 return match;
533 }
534
535 // Returns the address of the index'th element
536 static Flag* address_of_flag(CommandLineFlagWithType flag) {
537 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
538 return &Flag::flags[flag];
539 }
540
541 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
542 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
543 Flag* f = &Flag::flags[flag];
544 return f->is_default();
545 }
546
547 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
548 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
549 Flag* f = &Flag::flags[flag];
550 return f->is_ergonomic();
551 }
552
553 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
554 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
555 Flag* f = &Flag::flags[flag];
556 return f->is_command_line();
557 }
558
559 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
560 Flag* result = Flag::find_flag((char*)name, strlen(name));
561 if (result == NULL) return false;
562 *value = result->is_command_line();
563 return true;
564 }
565
566 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
567 Flag* result = Flag::find_flag(name, len);
568 if (result == NULL) return false;
569 if (!result->is_bool()) return false;
570 *value = result->get_bool();
571 return true;
572 }
573
574 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, Flag::Flags origin) {
575 Flag* result = Flag::find_flag(name, len);
576 if (result == NULL) return false;
577 if (!result->is_bool()) return false;
578 bool old_value = result->get_bool();
579 result->set_bool(*value);
580 *value = old_value;
581 result->set_origin(origin);
582 return true;
583 }
584
585 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
586 Flag* faddr = address_of_flag(flag);
587 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
588 faddr->set_bool(value);
589 faddr->set_origin(origin);
590 }
591
592 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
593 Flag* result = Flag::find_flag(name, len);
594 if (result == NULL) return false;
595 if (!result->is_intx()) return false;
596 *value = result->get_intx();
597 return true;
598 }
599
600 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, Flag::Flags origin) {
601 Flag* result = Flag::find_flag(name, len);
602 if (result == NULL) return false;
603 if (!result->is_intx()) return false;
604 intx old_value = result->get_intx();
605 result->set_intx(*value);
606 *value = old_value;
607 result->set_origin(origin);
608 return true;
609 }
610
611 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
612 Flag* faddr = address_of_flag(flag);
613 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
614 faddr->set_intx(value);
615 faddr->set_origin(origin);
616 }
617
618 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
619 Flag* result = Flag::find_flag(name, len);
620 if (result == NULL) return false;
621 if (!result->is_uintx()) return false;
622 *value = result->get_uintx();
623 return true;
624 }
625
626 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, Flag::Flags origin) {
627 Flag* result = Flag::find_flag(name, len);
628 if (result == NULL) return false;
629 if (!result->is_uintx()) return false;
630 uintx old_value = result->get_uintx();
631 result->set_uintx(*value);
632 *value = old_value;
633 result->set_origin(origin);
634 return true;
635 }
636
637 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
638 Flag* faddr = address_of_flag(flag);
639 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
640 faddr->set_uintx(value);
641 faddr->set_origin(origin);
642 }
643
644 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
645 Flag* result = Flag::find_flag(name, len);
646 if (result == NULL) return false;
647 if (!result->is_uint64_t()) return false;
648 *value = result->get_uint64_t();
649 return true;
650 }
651
652 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, Flag::Flags origin) {
653 Flag* result = Flag::find_flag(name, len);
654 if (result == NULL) return false;
655 if (!result->is_uint64_t()) return false;
656 uint64_t old_value = result->get_uint64_t();
657 result->set_uint64_t(*value);
658 *value = old_value;
659 result->set_origin(origin);
660 return true;
661 }
662
663 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
664 Flag* faddr = address_of_flag(flag);
665 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
666 faddr->set_uint64_t(value);
667 faddr->set_origin(origin);
668 }
669
670 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
671 Flag* result = Flag::find_flag(name, len);
672 if (result == NULL) return false;
673 if (!result->is_double()) return false;
674 *value = result->get_double();
675 return true;
676 }
677
678 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, Flag::Flags origin) {
679 Flag* result = Flag::find_flag(name, len);
680 if (result == NULL) return false;
681 if (!result->is_double()) return false;
682 double old_value = result->get_double();
683 result->set_double(*value);
684 *value = old_value;
685 result->set_origin(origin);
686 return true;
687 }
688
689 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
690 Flag* faddr = address_of_flag(flag);
691 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
692 faddr->set_double(value);
693 faddr->set_origin(origin);
694 }
695
696 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
697 Flag* result = Flag::find_flag(name, len);
698 if (result == NULL) return false;
699 if (!result->is_ccstr()) return false;
700 *value = result->get_ccstr();
701 return true;
702 }
703
704 // Contract: Flag will make private copy of the incoming value.
705 // Outgoing value is always malloc-ed, and caller MUST call free.
706 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, Flag::Flags origin) {
707 Flag* result = Flag::find_flag(name, len);
708 if (result == NULL) return false;
709 if (!result->is_ccstr()) return false;
710 ccstr old_value = result->get_ccstr();
711 char* new_value = NULL;
712 if (*value != NULL) {
713 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1, mtInternal);
714 strcpy(new_value, *value);
715 }
716 result->set_ccstr(new_value);
717 if (result->is_default() && old_value != NULL) {
718 // Prior value is NOT heap allocated, but was a literal constant.
719 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1, mtInternal);
720 strcpy(old_value_to_free, old_value);
721 old_value = old_value_to_free;
722 }
723 *value = old_value;
724 result->set_origin(origin);
725 return true;
726 }
727
728 // Contract: Flag will make private copy of the incoming value.
729 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
730 Flag* faddr = address_of_flag(flag);
731 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
732 ccstr old_value = faddr->get_ccstr();
733 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1, mtInternal);
734 strcpy(new_value, value);
735 faddr->set_ccstr(new_value);
736 if (!faddr->is_default() && old_value != NULL) {
737 // Prior value is heap allocated so free it.
738 FREE_C_HEAP_ARRAY(char, old_value, mtInternal);
739 }
740 faddr->set_origin(origin);
741 }
742
743 extern "C" {
744 static int compare_flags(const void* void_a, const void* void_b) {
745 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
746 }
747 }
748
749 void CommandLineFlags::printSetFlags(outputStream* out) {
750 // Print which flags were set on the command line
751 // note: this method is called before the thread structure is in place
752 // which means resource allocation cannot be used.
753
754 // The last entry is the null entry.
755 const size_t length = Flag::numFlags - 1;
756
757 // Sort
758 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
759 for (size_t i = 0; i < length; i++) {
760 array[i] = &flagTable[i];
761 }
762 qsort(array, length, sizeof(Flag*), compare_flags);
763
764 // Print
765 for (size_t i = 0; i < length; i++) {
766 if (array[i]->get_origin() /* naked field! */) {
767 array[i]->print_as_flag(out);
768 out->print(" ");
769 }
770 }
771 out->cr();
772 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
773 }
774
775 #ifndef PRODUCT
776
777
778 void CommandLineFlags::verify() {
779 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
780 }
781
782 #endif // PRODUCT
783
784 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
785 // Print the flags sorted by name
786 // note: this method is called before the thread structure is in place
787 // which means resource allocation cannot be used.
788
789 // The last entry is the null entry.
790 const size_t length = Flag::numFlags - 1;
791
792 // Sort
793 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
794 for (size_t i = 0; i < length; i++) {
795 array[i] = &flagTable[i];
796 }
797 qsort(array, length, sizeof(Flag*), compare_flags);
798
799 // Print
800 out->print_cr("[Global flags]");
801 for (size_t i = 0; i < length; i++) {
802 if (array[i]->is_unlocked()) {
803 array[i]->print_on(out, withComments);
804 }
805 }
806 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
807 }