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comparison: src/share/vm/runtime/globals.cpp

src/share/vm/runtime/globals.cpp

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

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