1 /*
2 * Copyright (c) 1997, 2014, 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 #if INCLUDE_JFR
27 #include "jfr/jfrEvents.hpp"
28 #endif
29 #include "memory/allocation.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/arguments.hpp"
32 #include "runtime/globals.hpp"
33 #include "runtime/globals_extension.hpp"
34 #include "utilities/ostream.hpp"
35 #include "utilities/macros.hpp"
36 #include "utilities/top.hpp"
37 #if INCLUDE_ALL_GCS
38 #include "gc_implementation/g1/g1_globals.hpp"
39 #endif // INCLUDE_ALL_GCS
40 #ifdef COMPILER1
41 #include "c1/c1_globals.hpp"
42 #endif
43 #ifdef COMPILER2
44 #include "opto/c2_globals.hpp"
45 #endif
46 #ifdef SHARK
47 #include "shark/shark_globals.hpp"
48 #endif
49
50 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
51
52 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
53 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
54 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
55 MATERIALIZE_NOTPRODUCT_FLAG, \
56 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
57 MATERIALIZE_LP64_PRODUCT_FLAG)
58
59 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
60 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
61 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
62
63 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
64 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
65 MATERIALIZE_NOTPRODUCT_FLAG)
66
67 MATERIALIZE_FLAGS_EXT
68
69
70 static bool is_product_build() {
71 #ifdef PRODUCT
72 return true;
73 #else
74 return false;
75 #endif
76 }
77
78 void Flag::check_writable() {
79 if (is_constant_in_binary()) {
80 fatal(err_msg("flag is constant: %s", _name));
81 }
82 }
83
84 bool Flag::is_bool() const {
85 return strcmp(_type, "bool") == 0;
86 }
87
88 bool Flag::get_bool() const {
89 return *((bool*) _addr);
90 }
91
92 void Flag::set_bool(bool value) {
93 check_writable();
94 *((bool*) _addr) = value;
95 }
96
97 bool Flag::is_intx() const {
98 return strcmp(_type, "intx") == 0;
99 }
100
101 intx Flag::get_intx() const {
102 return *((intx*) _addr);
103 }
104
105 void Flag::set_intx(intx value) {
106 check_writable();
107 *((intx*) _addr) = value;
108 }
109
110 bool Flag::is_uintx() const {
111 return strcmp(_type, "uintx") == 0;
112 }
113
114 uintx Flag::get_uintx() const {
115 return *((uintx*) _addr);
116 }
117
118 void Flag::set_uintx(uintx value) {
119 check_writable();
120 *((uintx*) _addr) = value;
121 }
122
123 bool Flag::is_uint64_t() const {
124 return strcmp(_type, "uint64_t") == 0;
125 }
126
127 uint64_t Flag::get_uint64_t() const {
128 return *((uint64_t*) _addr);
129 }
130
131 void Flag::set_uint64_t(uint64_t value) {
132 check_writable();
133 *((uint64_t*) _addr) = value;
134 }
135
136 bool Flag::is_double() const {
137 return strcmp(_type, "double") == 0;
138 }
139
140 double Flag::get_double() const {
141 return *((double*) _addr);
142 }
143
144 void Flag::set_double(double value) {
145 check_writable();
146 *((double*) _addr) = value;
147 }
148
149 bool Flag::is_ccstr() const {
150 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
151 }
152
153 bool Flag::ccstr_accumulates() const {
154 return strcmp(_type, "ccstrlist") == 0;
155 }
156
157 ccstr Flag::get_ccstr() const {
158 return *((ccstr*) _addr);
159 }
160
161 void Flag::set_ccstr(ccstr value) {
162 check_writable();
163 *((ccstr*) _addr) = value;
164 }
165
166
167 Flag::Flags Flag::get_origin() {
168 return Flags(_flags & VALUE_ORIGIN_MASK);
169 }
170
171 void Flag::set_origin(Flags origin) {
172 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
173 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | origin);
174 }
175
176 bool Flag::is_default() {
177 return (get_origin() == DEFAULT);
178 }
179
180 bool Flag::is_ergonomic() {
181 return (get_origin() == ERGONOMIC);
182 }
183
184 bool Flag::is_command_line() {
185 return (get_origin() == COMMAND_LINE);
186 }
187
188 bool Flag::is_product() const {
189 return (_flags & KIND_PRODUCT) != 0;
190 }
191
192 bool Flag::is_manageable() const {
193 return (_flags & KIND_MANAGEABLE) != 0;
194 }
195
196 bool Flag::is_diagnostic() const {
197 return (_flags & KIND_DIAGNOSTIC) != 0;
198 }
199
200 bool Flag::is_experimental() const {
201 return (_flags & KIND_EXPERIMENTAL) != 0;
202 }
203
204 bool Flag::is_notproduct() const {
205 return (_flags & KIND_NOT_PRODUCT) != 0;
206 }
207
208 bool Flag::is_develop() const {
209 return (_flags & KIND_DEVELOP) != 0;
210 }
211
212 bool Flag::is_read_write() const {
213 return (_flags & KIND_READ_WRITE) != 0;
214 }
215
216 bool Flag::is_commercial() const {
217 return (_flags & KIND_COMMERCIAL) != 0;
218 }
219
220 /**
221 * Returns if this flag is a constant in the binary. Right now this is
222 * true for notproduct and develop flags in product builds.
223 */
224 bool Flag::is_constant_in_binary() const {
225 #ifdef PRODUCT
226 return is_notproduct() || is_develop();
227 #else
228 return false;
229 #endif
230 }
231
232 bool Flag::is_unlocker() const {
233 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
234 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
235 is_unlocker_ext();
236 }
237
238 bool Flag::is_unlocked() const {
239 if (is_diagnostic()) {
240 return UnlockDiagnosticVMOptions;
241 }
242 if (is_experimental()) {
243 return UnlockExperimentalVMOptions;
244 }
245 return is_unlocked_ext();
246 }
247
248 void Flag::unlock_diagnostic() {
249 assert(is_diagnostic(), "sanity");
250 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
251 }
252
253 // Get custom message for this locked flag, or return NULL if
254 // none is available.
255 void Flag::get_locked_message(char* buf, int buflen) const {
256 buf[0] = '\0';
257 if (is_diagnostic() && !is_unlocked()) {
258 jio_snprintf(buf, buflen, "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n",
259 _name);
260 return;
261 }
262 if (is_experimental() && !is_unlocked()) {
263 jio_snprintf(buf, buflen, "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n",
264 _name);
265 return;
266 }
267 if (is_develop() && is_product_build()) {
268 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
269 _name);
270 return;
271 }
272 if (is_notproduct() && is_product_build()) {
273 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
274 _name);
275 return;
276 }
277 get_locked_message_ext(buf, buflen);
278 }
279
280 bool Flag::is_writeable() const {
281 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
282 }
283
284 // All flags except "manageable" are assumed to be internal flags.
285 // Long term, we need to define a mechanism to specify which flags
286 // are external/stable and change this function accordingly.
287 bool Flag::is_external() const {
288 return is_manageable() || is_external_ext();
289 }
290
291
292 // Length of format string (e.g. "%.1234s") for printing ccstr below
293 #define FORMAT_BUFFER_LEN 16
294
295 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
296 void Flag::print_on(outputStream* st, bool withComments) {
297 // Don't print notproduct and develop flags in a product build.
298 if (is_constant_in_binary()) {
299 return;
300 }
301
302 st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' '));
303
304 if (is_bool()) {
305 st->print("%-16s", get_bool() ? "true" : "false");
306 }
307 if (is_intx()) {
308 st->print("%-16ld", get_intx());
309 }
310 if (is_uintx()) {
311 st->print("%-16lu", get_uintx());
312 }
313 if (is_uint64_t()) {
314 st->print("%-16lu", get_uint64_t());
315 }
316 if (is_double()) {
317 st->print("%-16f", get_double());
318 }
319 if (is_ccstr()) {
320 const char* cp = get_ccstr();
321 if (cp != NULL) {
322 const char* eol;
323 while ((eol = strchr(cp, '\n')) != NULL) {
324 char format_buffer[FORMAT_BUFFER_LEN];
325 size_t llen = pointer_delta(eol, cp, sizeof(char));
326 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
327 "%%." SIZE_FORMAT "s", llen);
328 PRAGMA_DIAG_PUSH
329 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
330 st->print(format_buffer, cp);
331 PRAGMA_DIAG_POP
332 st->cr();
333 cp = eol+1;
334 st->print("%5s %-35s += ", "", _name);
335 }
336 st->print("%-16s", cp);
337 }
338 else st->print("%-16s", "");
339 }
340
341 st->print("%-20s", " ");
342 print_kind(st);
343
344 if (withComments) {
345 #ifndef PRODUCT
346 st->print("%s", _doc);
347 #endif
348 }
349 st->cr();
350 }
351
352 void Flag::print_kind(outputStream* st) {
353 struct Data {
354 int flag;
355 const char* name;
356 };
357
358 Data data[] = {
359 { KIND_C1, "C1" },
360 { KIND_C2, "C2" },
361 { KIND_ARCH, "ARCH" },
362 { KIND_SHARK, "SHARK" },
363 { KIND_PLATFORM_DEPENDENT, "pd" },
364 { KIND_PRODUCT, "product" },
365 { KIND_MANAGEABLE, "manageable" },
366 { KIND_DIAGNOSTIC, "diagnostic" },
367 { KIND_EXPERIMENTAL, "experimental" },
368 { KIND_COMMERCIAL, "commercial" },
369 { KIND_NOT_PRODUCT, "notproduct" },
370 { KIND_DEVELOP, "develop" },
371 { KIND_LP64_PRODUCT, "lp64_product" },
372 { KIND_READ_WRITE, "rw" },
373 { -1, "" }
374 };
375
376 if ((_flags & KIND_MASK) != 0) {
377 st->print("{");
378 bool is_first = true;
379
380 for (int i = 0; data[i].flag != -1; i++) {
381 Data d = data[i];
382 if ((_flags & d.flag) != 0) {
383 if (is_first) {
384 is_first = false;
385 } else {
386 st->print(" ");
387 }
388 st->print("%s", d.name);
389 }
390 }
391
392 st->print("}");
393 }
394 }
395
396 void Flag::print_as_flag(outputStream* st) {
397 if (is_bool()) {
398 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
399 } else if (is_intx()) {
400 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
401 } else if (is_uintx()) {
402 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
403 } else if (is_uint64_t()) {
404 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
405 } else if (is_double()) {
406 st->print("-XX:%s=%f", _name, get_double());
407 } else if (is_ccstr()) {
408 st->print("-XX:%s=", _name);
409 const char* cp = get_ccstr();
410 if (cp != NULL) {
411 // Need to turn embedded '\n's back into separate arguments
412 // Not so efficient to print one character at a time,
413 // but the choice is to do the transformation to a buffer
414 // and print that. And this need not be efficient.
415 for (; *cp != '\0'; cp += 1) {
416 switch (*cp) {
417 default:
418 st->print("%c", *cp);
419 break;
420 case '\n':
421 st->print(" -XX:%s=", _name);
422 break;
423 }
424 }
425 }
426 } else {
427 ShouldNotReachHere();
428 }
429 }
430
431 // 4991491 do not "optimize out" the was_set false values: omitting them
432 // tickles a Microsoft compiler bug causing flagTable to be malformed
433
434 #define NAME(name) NOT_PRODUCT(&name) PRODUCT_ONLY(&CONST_##name)
435
436 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) },
437 #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) },
438 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) },
439 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) },
440 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) },
441 #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) },
442 #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) },
443 #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) },
444 #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) },
445
446 #ifdef _LP64
447 #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) },
448 #else
449 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
450 #endif // _LP64
451
452 #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) },
453 #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) },
454 #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) },
455 #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) },
456 #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) },
457 #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) },
458
459 #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) },
460 #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) },
461 #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) },
462 #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) },
463 #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) },
464 #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) },
465 #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) },
466
467 #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) },
468 #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) },
469 #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) },
470 #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) },
471 #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) },
472
473 #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) },
474 #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) },
475 #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) },
476 #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) },
477 #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) },
478 #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) },
479
480 static Flag flagTable[] = {
481 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)
482 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)
483 #if INCLUDE_ALL_GCS
484 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)
485 #endif // INCLUDE_ALL_GCS
486 #ifdef COMPILER1
487 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)
488 #endif
489 #ifdef COMPILER2
490 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)
491 #endif
492 #ifdef SHARK
493 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)
494 #endif
495 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
496 FLAGTABLE_EXT
497 {0, NULL, NULL}
498 };
499
500 Flag* Flag::flags = flagTable;
501 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
502
503 inline bool str_equal(const char* s, const char* q, size_t len) {
504 // s is null terminated, q is not!
505 if (strlen(s) != (unsigned int) len) return false;
506 return strncmp(s, q, len) == 0;
507 }
508
509 // Search the flag table for a named flag
510 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
511 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
512 if (str_equal(current->_name, name, length)) {
513 // Found a matching entry.
514 // Don't report notproduct and develop flags in product builds.
515 if (current->is_constant_in_binary()) {
516 return (return_flag == true ? current : NULL);
517 }
518 // Report locked flags only if allowed.
519 if (!(current->is_unlocked() || current->is_unlocker())) {
520 if (!allow_locked) {
521 // disable use of locked flags, e.g. diagnostic, experimental,
522 // commercial... until they are explicitly unlocked
523 return NULL;
524 }
525 }
526 return current;
527 }
528 }
529 // Flag name is not in the flag table
530 return NULL;
531 }
532
533 // Compute string similarity based on Dice's coefficient
534 static float str_similar(const char* str1, const char* str2, size_t len2) {
535 int len1 = (int) strlen(str1);
536 int total = len1 + (int) len2;
537
538 int hit = 0;
539
540 for (int i = 0; i < len1 -1; ++i) {
541 for (int j = 0; j < (int) len2 -1; ++j) {
542 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
543 ++hit;
544 break;
545 }
546 }
547 }
548
549 return 2.0f * (float) hit / (float) total;
550 }
551
552 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
553 float VMOptionsFuzzyMatchSimilarity = 0.7f;
554 Flag* match = NULL;
555 float score;
556 float max_score = -1;
557
558 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
559 score = str_similar(current->_name, name, length);
560 if (score > max_score) {
561 max_score = score;
562 match = current;
563 }
564 }
565
566 if (!(match->is_unlocked() || match->is_unlocker())) {
567 if (!allow_locked) {
568 return NULL;
569 }
570 }
571
572 if (max_score < VMOptionsFuzzyMatchSimilarity) {
573 return NULL;
574 }
575
576 return match;
577 }
578
579 // Returns the address of the index'th element
580 static Flag* address_of_flag(CommandLineFlagWithType flag) {
581 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
582 return &Flag::flags[flag];
583 }
584
585 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
586 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
587 Flag* f = &Flag::flags[flag];
588 return f->is_default();
589 }
590
591 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
592 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
593 Flag* f = &Flag::flags[flag];
594 return f->is_ergonomic();
595 }
596
597 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
598 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
599 Flag* f = &Flag::flags[flag];
600 return f->is_command_line();
601 }
602
603 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
604 Flag* result = Flag::find_flag((char*)name, strlen(name));
605 if (result == NULL) return false;
606 *value = result->is_command_line();
607 return true;
608 }
609
610 template<class E, class T>
611 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin)
612 {
613 E e;
614 e.set_name(name);
615 e.set_oldValue(old_value);
616 e.set_newValue(new_value);
617 e.set_origin(origin);
618 e.commit();
619 }
620
621 bool CommandLineFlags::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) {
622 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
623 if (result == NULL) return false;
624 if (!result->is_bool()) return false;
625 *value = result->get_bool();
626 return true;
627 }
628
629 bool CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) {
630 Flag* result = Flag::find_flag(name, len);
631 if (result == NULL) return false;
632 if (!result->is_bool()) return false;
633 bool old_value = result->get_bool();
634 #if INCLUDE_JFR
635 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
636 #endif
637 result->set_bool(*value);
638 *value = old_value;
639 result->set_origin(origin);
640 return true;
641 }
642
643 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
644 Flag* faddr = address_of_flag(flag);
645 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
646 #if INCLUDE_JFR
647 trace_flag_changed<EventBooleanFlagChanged, bool>(faddr->_name, faddr->get_bool(), value, origin);
648 #endif
649 faddr->set_bool(value);
650 faddr->set_origin(origin);
651 }
652
653 bool CommandLineFlags::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) {
654 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
655 if (result == NULL) return false;
656 if (!result->is_intx()) return false;
657 *value = result->get_intx();
658 return true;
659 }
660
661 bool CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) {
662 Flag* result = Flag::find_flag(name, len);
663 if (result == NULL) return false;
664 if (!result->is_intx()) return false;
665 intx old_value = result->get_intx();
666 #if INCLUDE_JFR
667 trace_flag_changed<EventLongFlagChanged, s8>(name, old_value, *value, origin);
668 #endif
669 result->set_intx(*value);
670 *value = old_value;
671 result->set_origin(origin);
672 return true;
673 }
674
675 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
676 Flag* faddr = address_of_flag(flag);
677 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
678 #if INCLUDE_JFR
679 trace_flag_changed<EventLongFlagChanged, s8>(faddr->_name, faddr->get_intx(), value, origin);
680 #endif
681 faddr->set_intx(value);
682 faddr->set_origin(origin);
683 }
684
685 bool CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
686 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
687 if (result == NULL) return false;
688 if (!result->is_uintx()) return false;
689 *value = result->get_uintx();
690 return true;
691 }
692
693 bool CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) {
694 Flag* result = Flag::find_flag(name, len);
695 if (result == NULL) return false;
696 if (!result->is_uintx()) return false;
697 uintx old_value = result->get_uintx();
698 #if INCLUDE_JFR
699 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
700 #endif
701 result->set_uintx(*value);
702 *value = old_value;
703 result->set_origin(origin);
704 return true;
705 }
706
707 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
708 Flag* faddr = address_of_flag(flag);
709 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
710 #if INCLUDE_JFR
711 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uintx(), value, origin);
712 #endif
713 faddr->set_uintx(value);
714 faddr->set_origin(origin);
715 }
716
717 bool CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) {
718 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
719 if (result == NULL) return false;
720 if (!result->is_uint64_t()) return false;
721 *value = result->get_uint64_t();
722 return true;
723 }
724
725 bool CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) {
726 Flag* result = Flag::find_flag(name, len);
727 if (result == NULL) return false;
728 if (!result->is_uint64_t()) return false;
729 uint64_t old_value = result->get_uint64_t();
730 #if INCLUDE_JFR
731 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
732 #endif
733 result->set_uint64_t(*value);
734 *value = old_value;
735 result->set_origin(origin);
736 return true;
737 }
738
739 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
740 Flag* faddr = address_of_flag(flag);
741 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
742 #if INCLUDE_JFR
743 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uint64_t(), value, origin);
744 #endif
745 faddr->set_uint64_t(value);
746 faddr->set_origin(origin);
747 }
748
749 bool CommandLineFlags::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) {
750 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
751 if (result == NULL) return false;
752 if (!result->is_double()) return false;
753 *value = result->get_double();
754 return true;
755 }
756
757 bool CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) {
758 Flag* result = Flag::find_flag(name, len);
759 if (result == NULL) return false;
760 if (!result->is_double()) return false;
761 double old_value = result->get_double();
762 #if INCLUDE_JFR
763 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
764 #endif
765 result->set_double(*value);
766 *value = old_value;
767 result->set_origin(origin);
768 return true;
769 }
770
771 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
772 Flag* faddr = address_of_flag(flag);
773 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
774 #if INCLUDE_JFR
775 trace_flag_changed<EventDoubleFlagChanged, double>(faddr->_name, faddr->get_double(), value, origin);
776 #endif
777 faddr->set_double(value);
778 faddr->set_origin(origin);
779 }
780
781 bool CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) {
782 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
783 if (result == NULL) return false;
784 if (!result->is_ccstr()) return false;
785 *value = result->get_ccstr();
786 return true;
787 }
788
789 bool CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
790 Flag* result = Flag::find_flag(name, len);
791 if (result == NULL) return false;
792 if (!result->is_ccstr()) return false;
793 ccstr old_value = result->get_ccstr();
794 #if INCLUDE_JFR
795 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
796 #endif
797 char* new_value = NULL;
798 if (*value != NULL) {
799 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1, mtInternal);
800 strcpy(new_value, *value);
801 }
802 result->set_ccstr(new_value);
803 if (result->is_default() && old_value != NULL) {
804 // Prior value is NOT heap allocated, but was a literal constant.
805 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1, mtInternal);
806 strcpy(old_value_to_free, old_value);
807 old_value = old_value_to_free;
808 }
809 *value = old_value;
810 result->set_origin(origin);
811 return true;
812 }
813
814 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
815 Flag* faddr = address_of_flag(flag);
816 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
817 ccstr old_value = faddr->get_ccstr();
818 #if INCLUDE_JFR
819 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
820 #endif
821 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1, mtInternal);
822 strcpy(new_value, value);
823 faddr->set_ccstr(new_value);
824 if (!faddr->is_default() && old_value != NULL) {
825 // Prior value is heap allocated so free it.
826 FREE_C_HEAP_ARRAY(char, old_value, mtInternal);
827 }
828 faddr->set_origin(origin);
829 }
830
831 extern "C" {
832 static int compare_flags(const void* void_a, const void* void_b) {
833 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
834 }
835 }
836
837 void CommandLineFlags::printSetFlags(outputStream* out) {
838 // Print which flags were set on the command line
839 // note: this method is called before the thread structure is in place
840 // which means resource allocation cannot be used.
841
842 // The last entry is the null entry.
843 const size_t length = Flag::numFlags - 1;
844
845 // Sort
846 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
847 for (size_t i = 0; i < length; i++) {
848 array[i] = &flagTable[i];
849 }
850 qsort(array, length, sizeof(Flag*), compare_flags);
851
852 // Print
853 for (size_t i = 0; i < length; i++) {
854 if (array[i]->get_origin() /* naked field! */) {
855 array[i]->print_as_flag(out);
856 out->print(" ");
857 }
858 }
859 out->cr();
860 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
861 }
862
863 #ifndef PRODUCT
864
865
866 void CommandLineFlags::verify() {
867 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
868 }
869
870 #endif // PRODUCT
871
872 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
873 // Print the flags sorted by name
874 // note: this method is called before the thread structure is in place
875 // which means resource allocation cannot be used.
876
877 // The last entry is the null entry.
878 const size_t length = Flag::numFlags - 1;
879
880 // Sort
881 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
882 for (size_t i = 0; i < length; i++) {
883 array[i] = &flagTable[i];
884 }
885 qsort(array, length, sizeof(Flag*), compare_flags);
886
887 // Print
888 out->print_cr("[Global flags]");
889 for (size_t i = 0; i < length; i++) {
890 if (array[i]->is_unlocked()) {
891 array[i]->print_on(out, withComments);
892 }
893 }
894 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
895 }