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