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