1 /*
2 * Copyright (c) 1997, 2019, 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 #include "trace/tracing.hpp"
35 #if INCLUDE_ALL_GCS
36 #include "gc_implementation/g1/g1_globals.hpp"
37 #endif // INCLUDE_ALL_GCS
38 #ifdef COMPILER1
39 #include "c1/c1_globals.hpp"
40 #endif
41 #ifdef COMPILER2
42 #include "opto/c2_globals.hpp"
43 #endif
44 #ifdef SHARK
45 #include "shark/shark_globals.hpp"
46 #endif
47
48 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
49
50 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
51 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
52 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
53 MATERIALIZE_NOTPRODUCT_FLAG, \
54 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
55 MATERIALIZE_LP64_PRODUCT_FLAG)
56
57 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
58 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
59 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
60
61 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
62 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
63 MATERIALIZE_NOTPRODUCT_FLAG)
64
65 MATERIALIZE_FLAGS_EXT
66
67
68 static bool is_product_build() {
69 #ifdef PRODUCT
70 return true;
71 #else
72 return false;
73 #endif
74 }
75
76 void Flag::check_writable() {
77 if (is_constant_in_binary()) {
78 fatal(err_msg("flag is constant: %s", _name));
79 }
80 }
81
82 bool Flag::is_bool() const {
83 return strcmp(_type, "bool") == 0;
84 }
85
86 bool Flag::get_bool() const {
87 return *((bool*) _addr);
88 }
89
90 void Flag::set_bool(bool value) {
91 check_writable();
92 *((bool*) _addr) = value;
93 }
94
95 bool Flag::is_int() const {
96 return strcmp(_type, "int") == 0;
97 }
98
99 int Flag::get_int() const {
100 return *((int*) _addr);
101 }
102
103 void Flag::set_int(int value) {
104 check_writable();
105 *((int*) _addr) = value;
106 }
107
108 bool Flag::is_uint() const {
109 return strcmp(_type, "uint") == 0;
110 }
111
112 uint Flag::get_uint() const {
113 return *((uint*) _addr);
114 }
115
116 void Flag::set_uint(uint value) {
117 check_writable();
118 *((uint*) _addr) = value;
119 }
120
121 bool Flag::is_intx() const {
122 return strcmp(_type, "intx") == 0;
123 }
124
125 intx Flag::get_intx() const {
126 return *((intx*) _addr);
127 }
128
129 void Flag::set_intx(intx value) {
130 check_writable();
131 *((intx*) _addr) = value;
132 }
133
134 bool Flag::is_uintx() const {
135 return strcmp(_type, "uintx") == 0;
136 }
137
138 uintx Flag::get_uintx() const {
139 return *((uintx*) _addr);
140 }
141
142 void Flag::set_uintx(uintx value) {
143 check_writable();
144 *((uintx*) _addr) = value;
145 }
146
147 bool Flag::is_uint64_t() const {
148 return strcmp(_type, "uint64_t") == 0;
149 }
150
151 uint64_t Flag::get_uint64_t() const {
152 return *((uint64_t*) _addr);
153 }
154
155 void Flag::set_uint64_t(uint64_t value) {
156 check_writable();
157 *((uint64_t*) _addr) = value;
158 }
159
160 bool Flag::is_size_t() const {
161 return strcmp(_type, "size_t") == 0;
162 }
163
164 size_t Flag::get_size_t() const {
165 return *((size_t*) _addr);
166 }
167
168 void Flag::set_size_t(size_t value) {
169 check_writable();
170 *((size_t*) _addr) = value;
171 }
172
173 bool Flag::is_double() const {
174 return strcmp(_type, "double") == 0;
175 }
176
177 double Flag::get_double() const {
178 return *((double*) _addr);
179 }
180
181 void Flag::set_double(double value) {
182 check_writable();
183 *((double*) _addr) = value;
184 }
185
186 bool Flag::is_ccstr() const {
187 return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
188 }
189
190 bool Flag::ccstr_accumulates() const {
191 return strcmp(_type, "ccstrlist") == 0;
192 }
193
194 ccstr Flag::get_ccstr() const {
195 return *((ccstr*) _addr);
196 }
197
198 void Flag::set_ccstr(ccstr value) {
199 check_writable();
200 *((ccstr*) _addr) = value;
201 }
202
203
204 Flag::Flags Flag::get_origin() {
205 return Flags(_flags & VALUE_ORIGIN_MASK);
206 }
207
208 void Flag::set_origin(Flags origin) {
209 assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
210 _flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | origin);
211 }
212
213 bool Flag::is_default() {
214 return (get_origin() == DEFAULT);
215 }
216
217 bool Flag::is_ergonomic() {
218 return (get_origin() == ERGONOMIC);
219 }
220
221 bool Flag::is_command_line() {
222 return (get_origin() == COMMAND_LINE);
223 }
224
225 bool Flag::is_product() const {
226 return (_flags & KIND_PRODUCT) != 0;
227 }
228
229 bool Flag::is_manageable() const {
230 return (_flags & KIND_MANAGEABLE) != 0;
231 }
232
233 bool Flag::is_diagnostic() const {
234 return (_flags & KIND_DIAGNOSTIC) != 0;
235 }
236
237 bool Flag::is_experimental() const {
238 return (_flags & KIND_EXPERIMENTAL) != 0;
239 }
240
241 bool Flag::is_notproduct() const {
242 return (_flags & KIND_NOT_PRODUCT) != 0;
243 }
244
245 bool Flag::is_develop() const {
246 return (_flags & KIND_DEVELOP) != 0;
247 }
248
249 bool Flag::is_read_write() const {
250 return (_flags & KIND_READ_WRITE) != 0;
251 }
252
253 bool Flag::is_commercial() const {
254 return (_flags & KIND_COMMERCIAL) != 0;
255 }
256
257 /**
258 * Returns if this flag is a constant in the binary. Right now this is
259 * true for notproduct and develop flags in product builds.
260 */
261 bool Flag::is_constant_in_binary() const {
262 #ifdef PRODUCT
263 return is_notproduct() || is_develop();
264 #else
265 return false;
266 #endif
267 }
268
269 bool Flag::is_unlocker() const {
270 return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
271 strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
272 is_unlocker_ext();
273 }
274
275 bool Flag::is_unlocked() const {
276 if (is_diagnostic()) {
277 return UnlockDiagnosticVMOptions;
278 }
279 if (is_experimental()) {
280 return UnlockExperimentalVMOptions;
281 }
282 return is_unlocked_ext();
283 }
284
285 void Flag::unlock_diagnostic() {
286 assert(is_diagnostic(), "sanity");
287 _flags = Flags(_flags & ~KIND_DIAGNOSTIC);
288 }
289
290 // Get custom message for this locked flag, or return NULL if
291 // none is available.
292 void Flag::get_locked_message(char* buf, int buflen) const {
293 buf[0] = '\0';
294 if (is_diagnostic() && !is_unlocked()) {
295 jio_snprintf(buf, buflen, "Error: VM option '%s' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.\n",
296 _name);
297 return;
298 }
299 if (is_experimental() && !is_unlocked()) {
300 jio_snprintf(buf, buflen, "Error: VM option '%s' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.\n",
301 _name);
302 return;
303 }
304 if (is_develop() && is_product_build()) {
305 jio_snprintf(buf, buflen, "Error: VM option '%s' is develop and is available only in debug version of VM.\n",
306 _name);
307 return;
308 }
309 if (is_notproduct() && is_product_build()) {
310 jio_snprintf(buf, buflen, "Error: VM option '%s' is notproduct and is available only in debug version of VM.\n",
311 _name);
312 return;
313 }
314 get_locked_message_ext(buf, buflen);
315 }
316
317 bool Flag::is_writeable() const {
318 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
319 }
320
321 // All flags except "manageable" are assumed to be internal flags.
322 // Long term, we need to define a mechanism to specify which flags
323 // are external/stable and change this function accordingly.
324 bool Flag::is_external() const {
325 return is_manageable() || is_external_ext();
326 }
327
328
329 // Length of format string (e.g. "%.1234s") for printing ccstr below
330 #define FORMAT_BUFFER_LEN 16
331
332 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
333 void Flag::print_on(outputStream* st, bool withComments) {
334 // Don't print notproduct and develop flags in a product build.
335 if (is_constant_in_binary()) {
336 return;
337 }
338
339 st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' '));
340
341 if (is_bool()) {
342 st->print("%-16s", get_bool() ? "true" : "false");
343 }
344 if (is_intx()) {
345 st->print("%-16ld", get_intx());
346 }
347 if (is_uintx()) {
348 st->print("%-16lu", get_uintx());
349 }
350 if (is_uint64_t()) {
351 st->print("%-16lu", get_uint64_t());
352 }
353 if (is_double()) {
354 st->print("%-16f", get_double());
355 }
356 if (is_ccstr()) {
357 const char* cp = get_ccstr();
358 if (cp != NULL) {
359 const char* eol;
360 while ((eol = strchr(cp, '\n')) != NULL) {
361 char format_buffer[FORMAT_BUFFER_LEN];
362 size_t llen = pointer_delta(eol, cp, sizeof(char));
363 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
364 "%%." SIZE_FORMAT "s", llen);
365 PRAGMA_DIAG_PUSH
366 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
367 st->print(format_buffer, cp);
368 PRAGMA_DIAG_POP
369 st->cr();
370 cp = eol+1;
371 st->print("%5s %-35s += ", "", _name);
372 }
373 st->print("%-16s", cp);
374 }
375 else st->print("%-16s", "");
376 }
377
378 st->print("%-20s", " ");
379 print_kind(st);
380
381 if (withComments) {
382 #ifndef PRODUCT
383 st->print("%s", _doc);
384 #endif
385 }
386 st->cr();
387 }
388
389 void Flag::print_kind(outputStream* st) {
390 struct Data {
391 int flag;
392 const char* name;
393 };
394
395 Data data[] = {
396 { KIND_C1, "C1" },
397 { KIND_C2, "C2" },
398 { KIND_ARCH, "ARCH" },
399 { KIND_SHARK, "SHARK" },
400 { KIND_PLATFORM_DEPENDENT, "pd" },
401 { KIND_PRODUCT, "product" },
402 { KIND_MANAGEABLE, "manageable" },
403 { KIND_DIAGNOSTIC, "diagnostic" },
404 { KIND_EXPERIMENTAL, "experimental" },
405 { KIND_COMMERCIAL, "commercial" },
406 { KIND_NOT_PRODUCT, "notproduct" },
407 { KIND_DEVELOP, "develop" },
408 { KIND_LP64_PRODUCT, "lp64_product" },
409 { KIND_READ_WRITE, "rw" },
410 { -1, "" }
411 };
412
413 if ((_flags & KIND_MASK) != 0) {
414 st->print("{");
415 bool is_first = true;
416
417 for (int i = 0; data[i].flag != -1; i++) {
418 Data d = data[i];
419 if ((_flags & d.flag) != 0) {
420 if (is_first) {
421 is_first = false;
422 } else {
423 st->print(" ");
424 }
425 st->print("%s", d.name);
426 }
427 }
428
429 st->print("}");
430 }
431 }
432
433 void Flag::print_as_flag(outputStream* st) {
434 if (is_bool()) {
435 st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
436 } else if (is_intx()) {
437 st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
438 } else if (is_uintx()) {
439 st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
440 } else if (is_uint64_t()) {
441 st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
442 } else if (is_double()) {
443 st->print("-XX:%s=%f", _name, get_double());
444 } else if (is_ccstr()) {
445 st->print("-XX:%s=", _name);
446 const char* cp = get_ccstr();
447 if (cp != NULL) {
448 // Need to turn embedded '\n's back into separate arguments
449 // Not so efficient to print one character at a time,
450 // but the choice is to do the transformation to a buffer
451 // and print that. And this need not be efficient.
452 for (; *cp != '\0'; cp += 1) {
453 switch (*cp) {
454 default:
455 st->print("%c", *cp);
456 break;
457 case '\n':
458 st->print(" -XX:%s=", _name);
459 break;
460 }
461 }
462 }
463 } else {
464 ShouldNotReachHere();
465 }
466 }
467
468 // 4991491 do not "optimize out" the was_set false values: omitting them
469 // tickles a Microsoft compiler bug causing flagTable to be malformed
470
471 #define NAME(name) NOT_PRODUCT(&name) PRODUCT_ONLY(&CONST_##name)
472
473 #define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) },
474 #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) },
475 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) },
476 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) },
477 #define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) },
478 #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) },
479 #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) },
480 #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) },
481 #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) },
482
483 #ifdef _LP64
484 #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) },
485 #else
486 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
487 #endif // _LP64
488
489 #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) },
490 #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) },
491 #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) },
492 #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) },
493 #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) },
494 #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) },
495
496 #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) },
497 #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) },
498 #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) },
499 #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) },
500 #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) },
501 #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) },
502 #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) },
503
504 #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) },
505 #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) },
506 #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) },
507 #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) },
508 #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) },
509
510 #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) },
511 #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) },
512 #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) },
513 #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) },
514 #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) },
515 #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) },
516
517 static Flag flagTable[] = {
518 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)
519 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)
520 #if INCLUDE_ALL_GCS
521 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)
522 #endif // INCLUDE_ALL_GCS
523 #ifdef COMPILER1
524 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)
525 #endif
526 #ifdef COMPILER2
527 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)
528 #endif
529 #ifdef SHARK
530 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)
531 #endif
532 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
533 FLAGTABLE_EXT
534 {0, NULL, NULL}
535 };
536
537 Flag* Flag::flags = flagTable;
538 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
539
540 inline bool str_equal(const char* s, const char* q, size_t len) {
541 // s is null terminated, q is not!
542 if (strlen(s) != (unsigned int) len) return false;
543 return strncmp(s, q, len) == 0;
544 }
545
546 // Search the flag table for a named flag
547 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
548 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
549 if (str_equal(current->_name, name, length)) {
550 // Found a matching entry.
551 // Don't report notproduct and develop flags in product builds.
552 if (current->is_constant_in_binary()) {
553 return (return_flag == true ? current : NULL);
554 }
555 // Report locked flags only if allowed.
556 if (!(current->is_unlocked() || current->is_unlocker())) {
557 if (!allow_locked) {
558 // disable use of locked flags, e.g. diagnostic, experimental,
559 // commercial... until they are explicitly unlocked
560 return NULL;
561 }
562 }
563 return current;
564 }
565 }
566 // Flag name is not in the flag table
567 return NULL;
568 }
569
570 // Compute string similarity based on Dice's coefficient
571 static float str_similar(const char* str1, const char* str2, size_t len2) {
572 int len1 = (int) strlen(str1);
573 int total = len1 + (int) len2;
574
575 int hit = 0;
576
577 for (int i = 0; i < len1 -1; ++i) {
578 for (int j = 0; j < (int) len2 -1; ++j) {
579 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
580 ++hit;
581 break;
582 }
583 }
584 }
585
586 return 2.0f * (float) hit / (float) total;
587 }
588
589 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
590 float VMOptionsFuzzyMatchSimilarity = 0.7f;
591 Flag* match = NULL;
592 float score;
593 float max_score = -1;
594
595 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
596 score = str_similar(current->_name, name, length);
597 if (score > max_score) {
598 max_score = score;
599 match = current;
600 }
601 }
602
603 if (!(match->is_unlocked() || match->is_unlocker())) {
604 if (!allow_locked) {
605 return NULL;
606 }
607 }
608
609 if (max_score < VMOptionsFuzzyMatchSimilarity) {
610 return NULL;
611 }
612
613 return match;
614 }
615
616 // Returns the address of the index'th element
617 static Flag* address_of_flag(CommandLineFlagWithType flag) {
618 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
619 return &Flag::flags[flag];
620 }
621
622 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
623 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
624 Flag* f = &Flag::flags[flag];
625 return f->is_default();
626 }
627
628 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
629 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
630 Flag* f = &Flag::flags[flag];
631 return f->is_ergonomic();
632 }
633
634 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
635 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
636 Flag* f = &Flag::flags[flag];
637 return f->is_command_line();
638 }
639
640 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
641 Flag* result = Flag::find_flag((char*)name, strlen(name));
642 if (result == NULL) return false;
643 *value = result->is_command_line();
644 return true;
645 }
646
647 template<class E, class T>
648 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin)
649 {
650 E e;
651 e.set_name(name);
652 e.set_oldValue(old_value);
653 e.set_newValue(new_value);
654 e.set_origin(origin);
655 e.commit();
656 }
657
658 bool CommandLineFlags::boolAt(const char* name, size_t len, bool* value) {
659 Flag* result = Flag::find_flag(name, len);
660 if (result == NULL) return false;
661 if (!result->is_bool()) return false;
662 *value = result->get_bool();
663 return true;
664 }
665
666 bool CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) {
667 Flag* result = Flag::find_flag(name, len);
668 if (result == NULL) return false;
669 if (!result->is_bool()) return false;
670 bool old_value = result->get_bool();
671 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
672 result->set_bool(*value);
673 *value = old_value;
674 result->set_origin(origin);
675 return true;
676 }
677
678 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
679 Flag* faddr = address_of_flag(flag);
680 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
681 trace_flag_changed<EventBooleanFlagChanged, bool>(faddr->_name, faddr->get_bool(), value, origin);
682 faddr->set_bool(value);
683 faddr->set_origin(origin);
684 }
685
686 bool CommandLineFlags::intxAt(const char* name, size_t len, intx* value) {
687 Flag* result = Flag::find_flag(name, len);
688 if (result == NULL) return false;
689 if (!result->is_intx()) return false;
690 *value = result->get_intx();
691 return true;
692 }
693
694 bool CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) {
695 Flag* result = Flag::find_flag(name, len);
696 if (result == NULL) return false;
697 if (!result->is_intx()) return false;
698 intx old_value = result->get_intx();
699 trace_flag_changed<EventLongFlagChanged, s8>(name, old_value, *value, origin);
700 result->set_intx(*value);
701 *value = old_value;
702 result->set_origin(origin);
703 return true;
704 }
705
706 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
707 Flag* faddr = address_of_flag(flag);
708 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
709 trace_flag_changed<EventLongFlagChanged, s8>(faddr->_name, faddr->get_intx(), value, origin);
710 faddr->set_intx(value);
711 faddr->set_origin(origin);
712 }
713
714 bool CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
715 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
716 if (result == NULL) return false;
717 if (!result->is_uintx()) return false;
718 *value = result->get_uintx();
719 return true;
720 }
721
722 bool CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) {
723 Flag* result = Flag::find_flag(name, len);
724 if (result == NULL) return false;
725 if (!result->is_uintx()) return false;
726 uintx old_value = result->get_uintx();
727 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
728 result->set_uintx(*value);
729 *value = old_value;
730 result->set_origin(origin);
731 return true;
732 }
733
734 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
735 Flag* faddr = address_of_flag(flag);
736 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
737 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uintx(), value, origin);
738 faddr->set_uintx(value);
739 faddr->set_origin(origin);
740 }
741
742 bool CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value) {
743 Flag* result = Flag::find_flag(name, len);
744 if (result == NULL) return false;
745 if (!result->is_uint64_t()) return false;
746 *value = result->get_uint64_t();
747 return true;
748 }
749
750 bool CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) {
751 Flag* result = Flag::find_flag(name, len);
752 if (result == NULL) return false;
753 if (!result->is_uint64_t()) return false;
754 uint64_t old_value = result->get_uint64_t();
755 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
756 result->set_uint64_t(*value);
757 *value = old_value;
758 result->set_origin(origin);
759 return true;
760 }
761
762 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
763 Flag* faddr = address_of_flag(flag);
764 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
765 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uint64_t(), value, origin);
766 faddr->set_uint64_t(value);
767 faddr->set_origin(origin);
768 }
769
770 bool CommandLineFlags::doubleAt(const char* name, size_t len, double* value) {
771 Flag* result = Flag::find_flag(name, len);
772 if (result == NULL) return false;
773 if (!result->is_double()) return false;
774 *value = result->get_double();
775 return true;
776 }
777
778 bool CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) {
779 Flag* result = Flag::find_flag(name, len);
780 if (result == NULL) return false;
781 if (!result->is_double()) return false;
782 double old_value = result->get_double();
783 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
784 result->set_double(*value);
785 *value = old_value;
786 result->set_origin(origin);
787 return true;
788 }
789
790 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
791 Flag* faddr = address_of_flag(flag);
792 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
793 trace_flag_changed<EventDoubleFlagChanged, double>(faddr->_name, faddr->get_double(), value, origin);
794 faddr->set_double(value);
795 faddr->set_origin(origin);
796 }
797
798 bool CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value) {
799 Flag* result = Flag::find_flag(name, len);
800 if (result == NULL) return false;
801 if (!result->is_ccstr()) return false;
802 *value = result->get_ccstr();
803 return true;
804 }
805
806 bool CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
807 Flag* result = Flag::find_flag(name, len);
808 if (result == NULL) return false;
809 if (!result->is_ccstr()) return false;
810 ccstr old_value = result->get_ccstr();
811 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
812 char* new_value = NULL;
813 if (*value != NULL) {
814 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1, mtInternal);
815 strcpy(new_value, *value);
816 }
817 result->set_ccstr(new_value);
818 if (result->is_default() && old_value != NULL) {
819 // Prior value is NOT heap allocated, but was a literal constant.
820 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1, mtInternal);
821 strcpy(old_value_to_free, old_value);
822 old_value = old_value_to_free;
823 }
824 *value = old_value;
825 result->set_origin(origin);
826 return true;
827 }
828
829 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
830 Flag* faddr = address_of_flag(flag);
831 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
832 ccstr old_value = faddr->get_ccstr();
833 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
834 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1, mtInternal);
835 strcpy(new_value, value);
836 faddr->set_ccstr(new_value);
837 if (!faddr->is_default() && old_value != NULL) {
838 // Prior value is heap allocated so free it.
839 FREE_C_HEAP_ARRAY(char, old_value, mtInternal);
840 }
841 faddr->set_origin(origin);
842 }
843
844 extern "C" {
845 static int compare_flags(const void* void_a, const void* void_b) {
846 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
847 }
848 }
849
850 void CommandLineFlags::printSetFlags(outputStream* out) {
851 // Print which flags were set on the command line
852 // note: this method is called before the thread structure is in place
853 // which means resource allocation cannot be used.
854
855 // The last entry is the null entry.
856 const size_t length = Flag::numFlags - 1;
857
858 // Sort
859 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
860 for (size_t i = 0; i < length; i++) {
861 array[i] = &flagTable[i];
862 }
863 qsort(array, length, sizeof(Flag*), compare_flags);
864
865 // Print
866 for (size_t i = 0; i < length; i++) {
867 if (array[i]->get_origin() /* naked field! */) {
868 array[i]->print_as_flag(out);
869 out->print(" ");
870 }
871 }
872 out->cr();
873 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
874 }
875
876 #ifndef PRODUCT
877
878
879 void CommandLineFlags::verify() {
880 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
881 }
882
883 #endif // PRODUCT
884
885 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
886 // Print the flags sorted by name
887 // note: this method is called before the thread structure is in place
888 // which means resource allocation cannot be used.
889
890 // The last entry is the null entry.
891 const size_t length = Flag::numFlags - 1;
892
893 // Sort
894 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
895 for (size_t i = 0; i < length; i++) {
896 array[i] = &flagTable[i];
897 }
898 qsort(array, length, sizeof(Flag*), compare_flags);
899
900 // Print
901 out->print_cr("[Global flags]");
902 for (size_t i = 0; i < length; i++) {
903 if (array[i]->is_unlocked()) {
904 array[i]->print_on(out, withComments);
905 }
906 }
907 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
908 }