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 #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 "runtime/os.hpp"
32 #include "trace/tracing.hpp"
33 #include "utilities/ostream.hpp"
34 #include "utilities/macros.hpp"
35 #include "utilities/top.hpp"
36 #if INCLUDE_ALL_GCS
37 #include "gc_implementation/g1/g1_globals.hpp"
38 #endif // INCLUDE_ALL_GCS
39 #ifdef COMPILER1
40 #include "c1/c1_globals.hpp"
41 #endif
42 #ifdef COMPILER2
43 #include "opto/c2_globals.hpp"
44 #endif
45 #ifdef SHARK
46 #include "shark/shark_globals.hpp"
47 #endif
48
49 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
50
51 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
52 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
53 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
54 MATERIALIZE_NOTPRODUCT_FLAG, \
55 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
56 MATERIALIZE_LP64_PRODUCT_FLAG)
57
58 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
59 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
60 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
61
62 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
63 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
64 MATERIALIZE_NOTPRODUCT_FLAG)
65
66 MATERIALIZE_FLAGS_EXT
67
68
69 static bool is_product_build() {
70 #ifdef PRODUCT
71 return true;
72 #else
73 return false;
74 #endif
75 }
76
77 void Flag::check_writable() {
78 if (is_constant_in_binary()) {
79 fatal(err_msg("flag is constant: %s", _name));
80 }
81 }
82
83 bool Flag::is_bool() const {
84 return strcmp(_type, "bool") == 0;
85 }
86
87 bool Flag::get_bool() const {
88 return *((bool*) _addr);
89 }
90
91 void Flag::set_bool(bool value) {
92 check_writable();
93 *((bool*) _addr) = value;
94 }
95
96 bool Flag::is_intx() const {
97 return strcmp(_type, "intx") == 0;
98 }
99
100 intx Flag::get_intx() const {
101 return *((intx*) _addr);
102 }
103
104 void Flag::set_intx(intx value) {
105 check_writable();
106 *((intx*) _addr) = value;
107 }
108
109 bool Flag::is_uintx() const {
110 return strcmp(_type, "uintx") == 0;
111 }
112
113 uintx Flag::get_uintx() const {
114 return *((uintx*) _addr);
115 }
116
117 void Flag::set_uintx(uintx value) {
118 check_writable();
119 *((uintx*) _addr) = value;
120 }
121
122 bool Flag::is_uint64_t() const {
123 return strcmp(_type, "uint64_t") == 0;
124 }
125
126 uint64_t Flag::get_uint64_t() const {
127 return *((uint64_t*) _addr);
128 }
129
130 void Flag::set_uint64_t(uint64_t value) {
131 check_writable();
132 *((uint64_t*) _addr) = value;
133 }
134
135 bool Flag::is_size_t() const {
136 return strcmp(_type, "size_t") == 0;
137 }
138
139 size_t Flag::get_size_t() const {
140 return *((size_t*) _addr);
141 }
142
143 void Flag::set_size_t(size_t value) {
144 check_writable();
145 *((size_t*) _addr) = value;
146 }
147
148 bool Flag::is_double() const {
149 return strcmp(_type, "double") == 0;
150 }
151
152 double Flag::get_double() const {
153 return *((double*) _addr);
154 }
155
156 void Flag::set_double(double value) {
157 check_writable();
158 *((double*) _addr) = value;
159 }
160
161 bool Flag::is_ccstr() const {
162 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
163 }
164
165 bool Flag::ccstr_accumulates() const {
166 return strcmp(_type, "ccstrlist") == 0;
167 }
168
169 ccstr Flag::get_ccstr() const {
170 return *((ccstr*) _addr);
171 }
172
173 void Flag::set_ccstr(ccstr value) {
174 check_writable();
175 *((ccstr*) _addr) = value;
176 }
177
178
179 Flag::Flags Flag::get_origin() {
180 return Flags(_flags & VALUE_ORIGIN_MASK);
181 }
182
183 void Flag::set_origin(Flags origin) {
184 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
185 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | origin);
186 }
187
188 bool Flag::is_default() {
189 return (get_origin() == DEFAULT);
190 }
191
192 bool Flag::is_ergonomic() {
193 return (get_origin() == ERGONOMIC);
194 }
195
196 bool Flag::is_command_line() {
197 return (get_origin() == COMMAND_LINE);
198 }
199
200 bool Flag::is_product() const {
201 return (_flags & KIND_PRODUCT) != 0;
202 }
203
204 bool Flag::is_manageable() const {
205 return (_flags & KIND_MANAGEABLE) != 0;
206 }
207
208 bool Flag::is_diagnostic() const {
209 return (_flags & KIND_DIAGNOSTIC) != 0;
210 }
211
212 bool Flag::is_experimental() const {
213 return (_flags & KIND_EXPERIMENTAL) != 0;
214 }
215
216 bool Flag::is_notproduct() const {
217 return (_flags & KIND_NOT_PRODUCT) != 0;
218 }
219
220 bool Flag::is_develop() const {
221 return (_flags & KIND_DEVELOP) != 0;
222 }
223
224 bool Flag::is_read_write() const {
225 return (_flags & KIND_READ_WRITE) != 0;
226 }
227
228 bool Flag::is_commercial() const {
229 return (_flags & KIND_COMMERCIAL) != 0;
230 }
231
232 /**
233 * Returns if this flag is a constant in the binary. Right now this is
234 * true for notproduct and develop flags in product builds.
235 */
236 bool Flag::is_constant_in_binary() const {
237 #ifdef PRODUCT
238 return is_notproduct() || is_develop();
239 #else
240 return false;
241 #endif
242 }
243
244 bool Flag::is_unlocker() const {
245 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
246 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
247 is_unlocker_ext();
248 }
249
250 bool Flag::is_unlocked() const {
251 if (is_diagnostic()) {
252 return UnlockDiagnosticVMOptions;
253 }
254 if (is_experimental()) {
255 return UnlockExperimentalVMOptions;
256 }
257 return is_unlocked_ext();
258 }
259
260 void Flag::unlock_diagnostic() {
261 assert(is_diagnostic(), "sanity");
262 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
263 }
264
265 // Get custom message for this locked flag, or return NULL if
266 // none is available.
267 void Flag::get_locked_message(char* buf, int buflen) const {
268 buf[0] = '\0';
269 if (is_diagnostic() && !is_unlocked()) {
270 jio_snprintf(buf, buflen, "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n",
271 _name);
272 return;
273 }
274 if (is_experimental() && !is_unlocked()) {
275 jio_snprintf(buf, buflen, "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n",
276 _name);
277 return;
278 }
279 if (is_develop() && is_product_build()) {
280 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
281 _name);
282 return;
283 }
284 if (is_notproduct() && is_product_build()) {
285 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
286 _name);
287 return;
288 }
289 get_locked_message_ext(buf, buflen);
290 }
291
292 bool Flag::is_writeable() const {
293 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
294 }
295
296 // All flags except "manageable" are assumed to be internal flags.
297 // Long term, we need to define a mechanism to specify which flags
298 // are external/stable and change this function accordingly.
299 bool Flag::is_external() const {
300 return is_manageable() || is_external_ext();
301 }
302
303
304 // Length of format string (e.g. "%.1234s") for printing ccstr below
305 #define FORMAT_BUFFER_LEN 16
306
307 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
308 void Flag::print_on(outputStream* st, bool withComments) {
309 // Don't print notproduct and develop flags in a product build.
310 if (is_constant_in_binary()) {
311 return;
312 }
313
314 st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' '));
315
316 if (is_bool()) {
317 st->print("%-16s", get_bool() ? "true" : "false");
318 }
319 if (is_intx()) {
320 st->print("%-16ld", get_intx());
321 }
322 if (is_uintx()) {
323 st->print("%-16lu", get_uintx());
324 }
325 if (is_uint64_t()) {
326 st->print("%-16lu", get_uint64_t());
327 }
328 if (is_size_t()) {
329 st->print(SIZE_FORMAT_W(-16), get_size_t());
330 }
331 if (is_double()) {
332 st->print("%-16f", get_double());
333 }
334 if (is_ccstr()) {
335 const char* cp = get_ccstr();
336 if (cp != NULL) {
337 const char* eol;
338 while ((eol = strchr(cp, '\n')) != NULL) {
339 char format_buffer[FORMAT_BUFFER_LEN];
340 size_t llen = pointer_delta(eol, cp, sizeof(char));
341 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
342 "%%." SIZE_FORMAT "s", llen);
343 PRAGMA_DIAG_PUSH
344 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
345 st->print(format_buffer, cp);
346 PRAGMA_DIAG_POP
347 st->cr();
348 cp = eol+1;
349 st->print("%5s %-35s += ", "", _name);
350 }
351 st->print("%-16s", cp);
352 }
353 else st->print("%-16s", "");
354 }
355
356 st->print("%-20s", " ");
357 print_kind(st);
358
359 if (withComments) {
360 #ifndef PRODUCT
361 st->print("%s", _doc);
362 #endif
363 }
364 st->cr();
365 }
366
367 void Flag::print_kind(outputStream* st) {
368 struct Data {
369 int flag;
370 const char* name;
371 };
372
373 Data data[] = {
374 { KIND_C1, "C1" },
375 { KIND_C2, "C2" },
376 { KIND_ARCH, "ARCH" },
377 { KIND_SHARK, "SHARK" },
378 { KIND_PLATFORM_DEPENDENT, "pd" },
379 { KIND_PRODUCT, "product" },
380 { KIND_MANAGEABLE, "manageable" },
381 { KIND_DIAGNOSTIC, "diagnostic" },
382 { KIND_EXPERIMENTAL, "experimental" },
383 { KIND_COMMERCIAL, "commercial" },
384 { KIND_NOT_PRODUCT, "notproduct" },
385 { KIND_DEVELOP, "develop" },
386 { KIND_LP64_PRODUCT, "lp64_product" },
387 { KIND_READ_WRITE, "rw" },
388 { -1, "" }
389 };
390
391 if ((_flags & KIND_MASK) != 0) {
392 st->print("{");
393 bool is_first = true;
394
395 for (int i = 0; data[i].flag != -1; i++) {
396 Data d = data[i];
397 if ((_flags & d.flag) != 0) {
398 if (is_first) {
399 is_first = false;
400 } else {
401 st->print(" ");
402 }
403 st->print("%s", d.name);
404 }
405 }
406
407 st->print("}");
408 }
409 }
410
411 void Flag::print_as_flag(outputStream* st) {
412 if (is_bool()) {
413 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
414 } else if (is_intx()) {
415 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
416 } else if (is_uintx()) {
417 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
418 } else if (is_uint64_t()) {
419 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
420 } else if (is_size_t()) {
421 st->print("-XX:%s=" SIZE_FORMAT, _name, get_size_t());
422 } else if (is_double()) {
423 st->print("-XX:%s=%f", _name, get_double());
424 } else if (is_ccstr()) {
425 st->print("-XX:%s=", _name);
426 const char* cp = get_ccstr();
427 if (cp != NULL) {
428 // Need to turn embedded '\n's back into separate arguments
429 // Not so efficient to print one character at a time,
430 // but the choice is to do the transformation to a buffer
431 // and print that. And this need not be efficient.
432 for (; *cp != '\0'; cp += 1) {
433 switch (*cp) {
434 default:
435 st->print("%c", *cp);
436 break;
437 case '\n':
438 st->print(" -XX:%s=", _name);
439 break;
440 }
441 }
442 }
443 } else {
444 ShouldNotReachHere();
445 }
446 }
447
448 // 4991491 do not "optimize out" the was_set false values: omitting them
449 // tickles a Microsoft compiler bug causing flagTable to be malformed
450
451 #define NAME(name) NOT_PRODUCT(&name) PRODUCT_ONLY(&CONST_##name)
452
453 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) },
454 #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) },
455 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) },
456 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) },
457 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) },
458 #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) },
459 #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) },
460 #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) },
461 #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) },
462
463 #ifdef _LP64
464 #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) },
465 #else
466 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
467 #endif // _LP64
468
469 #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) },
470 #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) },
471 #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) },
472 #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) },
473 #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) },
474 #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) },
475
476 #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) },
477 #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) },
478 #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) },
479 #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) },
480 #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) },
481 #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) },
482 #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) },
483
484 #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) },
485 #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) },
486 #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) },
487 #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) },
488 #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) },
489
490 #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) },
491 #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) },
492 #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) },
493 #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) },
494 #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) },
495 #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) },
496
497 static Flag flagTable[] = {
498 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)
499 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)
500 #if INCLUDE_ALL_GCS
501 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)
502 #endif // INCLUDE_ALL_GCS
503 #ifdef COMPILER1
504 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)
505 #endif
506 #ifdef COMPILER2
507 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)
508 #endif
509 #ifdef SHARK
510 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)
511 #endif
512 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
513 FLAGTABLE_EXT
514 {0, NULL, NULL}
515 };
516
517 Flag* Flag::flags = flagTable;
518 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
519
520 inline bool str_equal(const char* s, const char* q, size_t len) {
521 // s is null terminated, q is not!
522 if (strlen(s) != (unsigned int) len) return false;
523 return strncmp(s, q, len) == 0;
524 }
525
526 // Search the flag table for a named flag
527 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
528 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
529 if (str_equal(current->_name, name, length)) {
530 // Found a matching entry.
531 // Don't report notproduct and develop flags in product builds.
532 if (current->is_constant_in_binary()) {
533 return (return_flag == true ? current : NULL);
534 }
535 // Report locked flags only if allowed.
536 if (!(current->is_unlocked() || current->is_unlocker())) {
537 if (!allow_locked) {
538 // disable use of locked flags, e.g. diagnostic, experimental,
539 // commercial... until they are explicitly unlocked
540 return NULL;
541 }
542 }
543 return current;
544 }
545 }
546 // Flag name is not in the flag table
547 return NULL;
548 }
549
550 // Compute string similarity based on Dice's coefficient
551 static float str_similar(const char* str1, const char* str2, size_t len2) {
552 int len1 = (int) strlen(str1);
553 int total = len1 + (int) len2;
554
555 int hit = 0;
556
557 for (int i = 0; i < len1 -1; ++i) {
558 for (int j = 0; j < (int) len2 -1; ++j) {
559 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
560 ++hit;
561 break;
562 }
563 }
564 }
565
566 return 2.0f * (float) hit / (float) total;
567 }
568
569 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
570 float VMOptionsFuzzyMatchSimilarity = 0.7f;
571 Flag* match = NULL;
572 float score;
573 float max_score = -1;
574
575 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
576 score = str_similar(current->_name, name, length);
577 if (score > max_score) {
578 max_score = score;
579 match = current;
580 }
581 }
582
583 if (!(match->is_unlocked() || match->is_unlocker())) {
584 if (!allow_locked) {
585 return NULL;
586 }
587 }
588
589 if (max_score < VMOptionsFuzzyMatchSimilarity) {
590 return NULL;
591 }
592
593 return match;
594 }
595
596 // Returns the address of the index'th element
597 static Flag* address_of_flag(CommandLineFlagWithType flag) {
598 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
599 return &Flag::flags[flag];
600 }
601
602 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
603 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
604 Flag* f = &Flag::flags[flag];
605 return f->is_default();
606 }
607
608 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
609 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
610 Flag* f = &Flag::flags[flag];
611 return f->is_ergonomic();
612 }
613
614 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
615 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
616 Flag* f = &Flag::flags[flag];
617 return f->is_command_line();
618 }
619
620 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
621 Flag* result = Flag::find_flag((char*)name, strlen(name));
622 if (result == NULL) return false;
623 *value = result->is_command_line();
624 return true;
625 }
626
627 template<class E, class T>
628 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin)
629 {
630 E e;
631 e.set_name(name);
632 e.set_old_value(old_value);
633 e.set_new_value(new_value);
634 e.set_origin(origin);
635 e.commit();
636 }
637
638 bool CommandLineFlags::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) {
639 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
640 if (result == NULL) return false;
641 if (!result->is_bool()) return false;
642 *value = result->get_bool();
643 return true;
644 }
645
646 bool CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) {
647 Flag* result = Flag::find_flag(name, len);
648 if (result == NULL) return false;
649 if (!result->is_bool()) return false;
650 bool old_value = result->get_bool();
651 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
652 result->set_bool(*value);
653 *value = old_value;
654 result->set_origin(origin);
655 return true;
656 }
657
658 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
659 Flag* faddr = address_of_flag(flag);
660 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
661 trace_flag_changed<EventBooleanFlagChanged, bool>(faddr->_name, faddr->get_bool(), value, origin);
662 faddr->set_bool(value);
663 faddr->set_origin(origin);
664 }
665
666 bool CommandLineFlags::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) {
667 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
668 if (result == NULL) return false;
669 if (!result->is_intx()) return false;
670 *value = result->get_intx();
671 return true;
672 }
673
674 bool CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) {
675 Flag* result = Flag::find_flag(name, len);
676 if (result == NULL) return false;
677 if (!result->is_intx()) return false;
678 intx old_value = result->get_intx();
679 trace_flag_changed<EventLongFlagChanged, s8>(name, old_value, *value, origin);
680 result->set_intx(*value);
681 *value = old_value;
682 result->set_origin(origin);
683 return true;
684 }
685
686 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
687 Flag* faddr = address_of_flag(flag);
688 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
689 trace_flag_changed<EventLongFlagChanged, s8>(faddr->_name, faddr->get_intx(), value, origin);
690 faddr->set_intx(value);
691 faddr->set_origin(origin);
692 }
693
694 bool CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
695 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
696 if (result == NULL) return false;
697 if (!result->is_uintx()) return false;
698 *value = result->get_uintx();
699 return true;
700 }
701
702 bool CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) {
703 Flag* result = Flag::find_flag(name, len);
704 if (result == NULL) return false;
705 if (!result->is_uintx()) return false;
706 uintx old_value = result->get_uintx();
707 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
708 result->set_uintx(*value);
709 *value = old_value;
710 result->set_origin(origin);
711 return true;
712 }
713
714 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
715 Flag* faddr = address_of_flag(flag);
716 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
717 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uintx(), value, origin);
718 faddr->set_uintx(value);
719 faddr->set_origin(origin);
720 }
721
722 bool CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) {
723 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
724 if (result == NULL) return false;
725 if (!result->is_uint64_t()) return false;
726 *value = result->get_uint64_t();
727 return true;
728 }
729
730 bool CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) {
731 Flag* result = Flag::find_flag(name, len);
732 if (result == NULL) return false;
733 if (!result->is_uint64_t()) return false;
734 uint64_t old_value = result->get_uint64_t();
735 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
736 result->set_uint64_t(*value);
737 *value = old_value;
738 result->set_origin(origin);
739 return true;
740 }
741
742 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
743 Flag* faddr = address_of_flag(flag);
744 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
745 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uint64_t(), value, origin);
746 faddr->set_uint64_t(value);
747 faddr->set_origin(origin);
748 }
749
750 bool CommandLineFlags::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) {
751 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
752 if (result == NULL) return false;
753 if (!result->is_size_t()) return false;
754 *value = result->get_size_t();
755 return true;
756 }
757
758 bool CommandLineFlags::size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin) {
759 Flag* result = Flag::find_flag(name, len);
760 if (result == NULL) return false;
761 if (!result->is_size_t()) return false;
762 size_t old_value = result->get_size_t();
763 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
764 result->set_size_t(*value);
765 *value = old_value;
766 result->set_origin(origin);
767 return true;
768 }
769
770 void CommandLineFlagsEx::size_tAtPut(CommandLineFlagWithType flag, size_t value, Flag::Flags origin) {
771 Flag* faddr = address_of_flag(flag);
772 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type");
773 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_size_t(), value, origin);
774 faddr->set_size_t(value);
775 faddr->set_origin(origin);
776 }
777
778 bool CommandLineFlags::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) {
779 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
780 if (result == NULL) return false;
781 if (!result->is_double()) return false;
782 *value = result->get_double();
783 return true;
784 }
785
786 bool CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) {
787 Flag* result = Flag::find_flag(name, len);
788 if (result == NULL) return false;
789 if (!result->is_double()) return false;
790 double old_value = result->get_double();
791 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
792 result->set_double(*value);
793 *value = old_value;
794 result->set_origin(origin);
795 return true;
796 }
797
798 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
799 Flag* faddr = address_of_flag(flag);
800 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
801 trace_flag_changed<EventDoubleFlagChanged, double>(faddr->_name, faddr->get_double(), value, origin);
802 faddr->set_double(value);
803 faddr->set_origin(origin);
804 }
805
806 bool CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) {
807 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
808 if (result == NULL) return false;
809 if (!result->is_ccstr()) return false;
810 *value = result->get_ccstr();
811 return true;
812 }
813
814 bool CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
815 Flag* result = Flag::find_flag(name, len);
816 if (result == NULL) return false;
817 if (!result->is_ccstr()) return false;
818 ccstr old_value = result->get_ccstr();
819 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
820 char* new_value = NULL;
821 if (*value != NULL) {
822 new_value = os::strdup_check_oom(*value);
823 }
824 result->set_ccstr(new_value);
825 if (result->is_default() && old_value != NULL) {
826 // Prior value is NOT heap allocated, but was a literal constant.
827 old_value = os::strdup_check_oom(old_value);
828 }
829 *value = old_value;
830 result->set_origin(origin);
831 return true;
832 }
833
834 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
835 Flag* faddr = address_of_flag(flag);
836 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
837 ccstr old_value = faddr->get_ccstr();
838 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
839 char* new_value = os::strdup_check_oom(value);
840 faddr->set_ccstr(new_value);
841 if (!faddr->is_default() && old_value != NULL) {
842 // Prior value is heap allocated so free it.
843 FREE_C_HEAP_ARRAY(char, old_value);
844 }
845 faddr->set_origin(origin);
846 }
847
848 extern "C" {
849 static int compare_flags(const void* void_a, const void* void_b) {
850 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
851 }
852 }
853
854 void CommandLineFlags::printSetFlags(outputStream* out) {
855 // Print which flags were set on the command line
856 // note: this method is called before the thread structure is in place
857 // which means resource allocation cannot be used.
858
859 // The last entry is the null entry.
860 const size_t length = Flag::numFlags - 1;
861
862 // Sort
863 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
864 for (size_t i = 0; i < length; i++) {
865 array[i] = &flagTable[i];
866 }
867 qsort(array, length, sizeof(Flag*), compare_flags);
868
869 // Print
870 for (size_t i = 0; i < length; i++) {
871 if (array[i]->get_origin() /* naked field! */) {
872 array[i]->print_as_flag(out);
873 out->print(" ");
874 }
875 }
876 out->cr();
877 FREE_C_HEAP_ARRAY(Flag*, array);
878 }
879
880 #ifndef PRODUCT
881
882
883 void CommandLineFlags::verify() {
884 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
885 }
886
887 #endif // PRODUCT
888
889 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
890 // Print the flags sorted by name
891 // note: this method is called before the thread structure is in place
892 // which means resource allocation cannot be used.
893
894 // The last entry is the null entry.
895 const size_t length = Flag::numFlags - 1;
896
897 // Sort
898 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
899 for (size_t i = 0; i < length; i++) {
900 array[i] = &flagTable[i];
901 }
902 qsort(array, length, sizeof(Flag*), compare_flags);
903
904 // Print
905 out->print_cr("[Global flags]");
906 for (size_t i = 0; i < length; i++) {
907 if (array[i]->is_unlocked()) {
908 array[i]->print_on(out, withComments);
909 }
910 }
911 FREE_C_HEAP_ARRAY(Flag*, array);
912 }