1 /*
2 * Copyright (c) 1997, 2013, 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 #if INCLUDE_ALL_GCS
35 #include "gc_implementation/g1/g1_globals.hpp"
36 #endif // INCLUDE_ALL_GCS
37 #ifdef COMPILER1
38 #include "c1/c1_globals.hpp"
39 #endif
40 #ifdef COMPILER2
41 #include "opto/c2_globals.hpp"
42 #endif
43 #ifdef SHARK
44 #include "shark/shark_globals.hpp"
45 #endif
46
47 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
48 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
49 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
50 MATERIALIZE_NOTPRODUCT_FLAG, \
51 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
52 MATERIALIZE_LP64_PRODUCT_FLAG)
53
54 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
55 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
56 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
57
58 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
59 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
60 MATERIALIZE_NOTPRODUCT_FLAG)
61
62 MATERIALIZE_FLAGS_EXT
63
64
65 bool Flag::is_unlocker() const {
66 return strcmp(name, "UnlockDiagnosticVMOptions") == 0 ||
67 strcmp(name, "UnlockExperimentalVMOptions") == 0 ||
68 is_unlocker_ext();
69 }
70
71 bool Flag::is_unlocked() const {
72 if (strcmp(kind, "{diagnostic}") == 0 ||
73 strcmp(kind, "{C2 diagnostic}") == 0 ||
74 strcmp(kind, "{ARCH diagnostic}") == 0 ||
75 strcmp(kind, "{Shark diagnostic}") == 0) {
76 return UnlockDiagnosticVMOptions;
77 } else if (strcmp(kind, "{experimental}") == 0 ||
78 strcmp(kind, "{C2 experimental}") == 0 ||
79 strcmp(kind, "{ARCH experimental}") == 0 ||
80 strcmp(kind, "{Shark experimental}") == 0) {
81 return UnlockExperimentalVMOptions;
82 } else {
83 return is_unlocked_ext();
84 }
85 }
86
87 // Get custom message for this locked flag, or return NULL if
88 // none is available.
89 void Flag::get_locked_message(char* buf, int buflen) const {
90 get_locked_message_ext(buf, buflen);
91 }
92
93 bool Flag::is_writeable() const {
94 return strcmp(kind, "{manageable}") == 0 ||
95 strcmp(kind, "{product rw}") == 0 ||
96 is_writeable_ext();
97 }
98
99 // All flags except "manageable" are assumed to be internal flags.
100 // Long term, we need to define a mechanism to specify which flags
101 // are external/stable and change this function accordingly.
102 bool Flag::is_external() const {
103 return strcmp(kind, "{manageable}") == 0 || is_external_ext();
104 }
105
106
107 // Length of format string (e.g. "%.1234s") for printing ccstr below
108 #define FORMAT_BUFFER_LEN 16
109
110 void Flag::print_on(outputStream* st, bool withComments) {
111 st->print("%9s %-40s %c= ", type, name, (origin != DEFAULT ? ':' : ' '));
112 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false");
113 if (is_intx()) st->print("%-16ld", get_intx());
114 if (is_uintx()) st->print("%-16lu", get_uintx());
115 if (is_uint64_t()) st->print("%-16lu", get_uint64_t());
116 if (is_double()) st->print("%-16f", get_double());
117
118 if (is_ccstr()) {
119 const char* cp = get_ccstr();
120 if (cp != NULL) {
121 const char* eol;
122 while ((eol = strchr(cp, '\n')) != NULL) {
123 char format_buffer[FORMAT_BUFFER_LEN];
124 size_t llen = pointer_delta(eol, cp, sizeof(char));
125 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
126 "%%." SIZE_FORMAT "s", llen);
127 st->print(format_buffer, cp);
128 st->cr();
129 cp = eol+1;
130 st->print("%5s %-35s += ", "", name);
131 }
132 st->print("%-16s", cp);
133 }
134 else st->print("%-16s", "");
135 }
136 st->print("%-20s", kind);
137 if (withComments) {
138 #ifndef PRODUCT
139 st->print("%s", doc );
140 #endif
141 }
142 st->cr();
143 }
144
145 void Flag::print_as_flag(outputStream* st) {
146 if (is_bool()) {
147 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
148 } else if (is_intx()) {
149 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
150 } else if (is_uintx()) {
151 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
152 } else if (is_uint64_t()) {
153 st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
154 } else if (is_double()) {
155 st->print("-XX:%s=%f", name, get_double());
156 } else if (is_ccstr()) {
157 st->print("-XX:%s=", name);
158 const char* cp = get_ccstr();
159 if (cp != NULL) {
160 // Need to turn embedded '\n's back into separate arguments
161 // Not so efficient to print one character at a time,
162 // but the choice is to do the transformation to a buffer
163 // and print that. And this need not be efficient.
164 for (; *cp != '\0'; cp += 1) {
165 switch (*cp) {
166 default:
167 st->print("%c", *cp);
168 break;
169 case '\n':
170 st->print(" -XX:%s=", name);
171 break;
172 }
173 }
174 }
175 } else {
176 ShouldNotReachHere();
177 }
178 }
179
180 // 4991491 do not "optimize out" the was_set false values: omitting them
181 // tickles a Microsoft compiler bug causing flagTable to be malformed
182
183 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product}", DEFAULT },
184 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{pd product}", DEFAULT },
185 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{diagnostic}", DEFAULT },
186 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{experimental}", DEFAULT },
187 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{manageable}", DEFAULT },
188 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product rw}", DEFAULT },
189
190 #ifdef PRODUCT
191 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
192 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
193 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
194 #else
195 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "", DEFAULT },
196 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{pd}", DEFAULT },
197 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{notproduct}", DEFAULT },
198 #endif
199
200 #ifdef _LP64
201 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{lp64_product}", DEFAULT },
202 #else
203 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
204 #endif // _LP64
205
206 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 product}", DEFAULT },
207 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 pd product}", DEFAULT },
208 #define C1_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 diagnostic}", DEFAULT },
209 #ifdef PRODUCT
210 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
211 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
212 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
213 #else
214 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1}", DEFAULT },
215 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C1 pd}", DEFAULT },
216 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1 notproduct}", DEFAULT },
217 #endif
218
219 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 product}", DEFAULT },
220 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 pd product}", DEFAULT },
221 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 diagnostic}", DEFAULT },
222 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 experimental}", DEFAULT },
223 #ifdef PRODUCT
224 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
225 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
226 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
227 #else
228 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2}", DEFAULT },
229 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C2 pd}", DEFAULT },
230 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2 notproduct}", DEFAULT },
231 #endif
232
233 #define ARCH_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{ARCH product}", DEFAULT },
234 #define ARCH_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{ARCH diagnostic}", DEFAULT },
235 #define ARCH_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{ARCH experimental}", DEFAULT },
236 #ifdef PRODUCT
237 #define ARCH_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
238 #define ARCH_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
239 #else
240 #define ARCH_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{ARCH}", DEFAULT },
241 #define ARCH_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{ARCH notproduct}", DEFAULT },
242 #endif
243
244 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark product}", DEFAULT },
245 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark pd product}", DEFAULT },
246 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark diagnostic}", DEFAULT },
247 #ifdef PRODUCT
248 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
249 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
250 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
251 #else
252 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark}", DEFAULT },
253 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{Shark pd}", DEFAULT },
254 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark notproduct}", DEFAULT },
255 #endif
256
257 static Flag flagTable[] = {
258 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)
259 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)
260 #if INCLUDE_ALL_GCS
261 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)
262 #endif // INCLUDE_ALL_GCS
263 #ifdef COMPILER1
264 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)
265 #endif
266 #ifdef COMPILER2
267 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)
268 #endif
269 #ifdef SHARK
270 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)
271 #endif
272 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
273 FLAGTABLE_EXT
274 {0, NULL, NULL}
275 };
276
277 Flag* Flag::flags = flagTable;
278 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
279
280 inline bool str_equal(const char* s, const char* q, size_t len) {
281 // s is null terminated, q is not!
282 if (strlen(s) != (unsigned int) len) return false;
283 return strncmp(s, q, len) == 0;
284 }
285
286 // Search the flag table for a named flag
287 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked) {
288 for (Flag* current = &flagTable[0]; current->name != NULL; current++) {
289 if (str_equal(current->name, name, length)) {
290 // Found a matching entry. Report locked flags only if allowed.
291 if (!(current->is_unlocked() || current->is_unlocker())) {
292 if (!allow_locked) {
293 // disable use of locked flags, e.g. diagnostic, experimental,
294 // commercial... until they are explicitly unlocked
295 return NULL;
296 }
297 }
298 return current;
299 }
300 }
301 // Flag name is not in the flag table
302 return NULL;
303 }
304
305 // Compute string similarity based on Dice's coefficient
306 static float str_similar(const char* str1, const char* str2, size_t len2) {
307 int len1 = (int) strlen(str1);
308 int total = len1 + (int) len2;
309
310 int hit = 0;
311
312 for (int i = 0; i < len1 -1; ++i) {
313 for (int j = 0; j < (int) len2 -1; ++j) {
314 if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
315 ++hit;
316 break;
317 }
318 }
319 }
320
321 return 2.0f * (float) hit / (float) total;
322 }
323
324 Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
325 float VMOptionsFuzzyMatchSimilarity = 0.7f;
326 Flag* match = NULL;
327 float score;
328 float max_score = -1;
329
330 for (Flag* current = &flagTable[0]; current->name != NULL; current++) {
331 score = str_similar(current->name, name, length);
332 if (score > max_score) {
333 max_score = score;
334 match = current;
335 }
336 }
337
338 if (!(match->is_unlocked() || match->is_unlocker())) {
339 if (!allow_locked) {
340 return NULL;
341 }
342 }
343
344 if (max_score < VMOptionsFuzzyMatchSimilarity) {
345 return NULL;
346 }
347
348 return match;
349 }
350
351 // Returns the address of the index'th element
352 static Flag* address_of_flag(CommandLineFlagWithType flag) {
353 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
354 return &Flag::flags[flag];
355 }
356
357 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
358 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
359 Flag* f = &Flag::flags[flag];
360 return (f->origin == DEFAULT);
361 }
362
363 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
364 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
365 Flag* f = &Flag::flags[flag];
366 return (f->origin == ERGONOMIC);
367 }
368
369 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
370 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
371 Flag* f = &Flag::flags[flag];
372 return (f->origin == COMMAND_LINE);
373 }
374
375 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
376 Flag* result = Flag::find_flag((char*)name, strlen(name));
377 if (result == NULL) return false;
378 *value = (result->origin == COMMAND_LINE);
379 return true;
380 }
381
382 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
383 Flag* result = Flag::find_flag(name, len);
384 if (result == NULL) return false;
385 if (!result->is_bool()) return false;
386 *value = result->get_bool();
387 return true;
388 }
389
390 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
391 Flag* result = Flag::find_flag(name, len);
392 if (result == NULL) return false;
393 if (!result->is_bool()) return false;
394 bool old_value = result->get_bool();
395 result->set_bool(*value);
396 *value = old_value;
397 result->origin = origin;
398 return true;
399 }
400
401 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
402 Flag* faddr = address_of_flag(flag);
403 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
404 faddr->set_bool(value);
405 faddr->origin = origin;
406 }
407
408 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
409 Flag* result = Flag::find_flag(name, len);
410 if (result == NULL) return false;
411 if (!result->is_intx()) return false;
412 *value = result->get_intx();
413 return true;
414 }
415
416 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
417 Flag* result = Flag::find_flag(name, len);
418 if (result == NULL) return false;
419 if (!result->is_intx()) return false;
420 intx old_value = result->get_intx();
421 result->set_intx(*value);
422 *value = old_value;
423 result->origin = origin;
424 return true;
425 }
426
427 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
428 Flag* faddr = address_of_flag(flag);
429 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
430 faddr->set_intx(value);
431 faddr->origin = origin;
432 }
433
434 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
435 Flag* result = Flag::find_flag(name, len);
436 if (result == NULL) return false;
437 if (!result->is_uintx()) return false;
438 *value = result->get_uintx();
439 return true;
440 }
441
442 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
443 Flag* result = Flag::find_flag(name, len);
444 if (result == NULL) return false;
445 if (!result->is_uintx()) return false;
446 uintx old_value = result->get_uintx();
447 result->set_uintx(*value);
448 *value = old_value;
449 result->origin = origin;
450 return true;
451 }
452
453 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
454 Flag* faddr = address_of_flag(flag);
455 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
456 faddr->set_uintx(value);
457 faddr->origin = origin;
458 }
459
460 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
461 Flag* result = Flag::find_flag(name, len);
462 if (result == NULL) return false;
463 if (!result->is_uint64_t()) return false;
464 *value = result->get_uint64_t();
465 return true;
466 }
467
468 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
469 Flag* result = Flag::find_flag(name, len);
470 if (result == NULL) return false;
471 if (!result->is_uint64_t()) return false;
472 uint64_t old_value = result->get_uint64_t();
473 result->set_uint64_t(*value);
474 *value = old_value;
475 result->origin = origin;
476 return true;
477 }
478
479 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
480 Flag* faddr = address_of_flag(flag);
481 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
482 faddr->set_uint64_t(value);
483 faddr->origin = origin;
484 }
485
486 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
487 Flag* result = Flag::find_flag(name, len);
488 if (result == NULL) return false;
489 if (!result->is_double()) return false;
490 *value = result->get_double();
491 return true;
492 }
493
494 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
495 Flag* result = Flag::find_flag(name, len);
496 if (result == NULL) return false;
497 if (!result->is_double()) return false;
498 double old_value = result->get_double();
499 result->set_double(*value);
500 *value = old_value;
501 result->origin = origin;
502 return true;
503 }
504
505 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
506 Flag* faddr = address_of_flag(flag);
507 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
508 faddr->set_double(value);
509 faddr->origin = origin;
510 }
511
512 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
513 Flag* result = Flag::find_flag(name, len);
514 if (result == NULL) return false;
515 if (!result->is_ccstr()) return false;
516 *value = result->get_ccstr();
517 return true;
518 }
519
520 // Contract: Flag will make private copy of the incoming value.
521 // Outgoing value is always malloc-ed, and caller MUST call free.
522 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
523 Flag* result = Flag::find_flag(name, len);
524 if (result == NULL) return false;
525 if (!result->is_ccstr()) return false;
526 ccstr old_value = result->get_ccstr();
527 char* new_value = NULL;
528 if (*value != NULL) {
529 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1, mtInternal);
530 strcpy(new_value, *value);
531 }
532 result->set_ccstr(new_value);
533 if (result->origin == DEFAULT && old_value != NULL) {
534 // Prior value is NOT heap allocated, but was a literal constant.
535 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1, mtInternal);
536 strcpy(old_value_to_free, old_value);
537 old_value = old_value_to_free;
538 }
539 *value = old_value;
540 result->origin = origin;
541 return true;
542 }
543
544 // Contract: Flag will make private copy of the incoming value.
545 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
546 Flag* faddr = address_of_flag(flag);
547 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
548 ccstr old_value = faddr->get_ccstr();
549 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1, mtInternal);
550 strcpy(new_value, value);
551 faddr->set_ccstr(new_value);
552 if (faddr->origin != DEFAULT && old_value != NULL) {
553 // Prior value is heap allocated so free it.
554 FREE_C_HEAP_ARRAY(char, old_value, mtInternal);
555 }
556 faddr->origin = origin;
557 }
558
559 extern "C" {
560 static int compare_flags(const void* void_a, const void* void_b) {
561 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
562 }
563 }
564
565 void CommandLineFlags::printSetFlags(outputStream* out) {
566 // Print which flags were set on the command line
567 // note: this method is called before the thread structure is in place
568 // which means resource allocation cannot be used.
569
570 // Compute size
571 int length= 0;
572 while (flagTable[length].name != NULL) length++;
573
574 // Sort
575 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
576 for (int index = 0; index < length; index++) {
577 array[index] = &flagTable[index];
578 }
579 qsort(array, length, sizeof(Flag*), compare_flags);
580
581 // Print
582 for (int i = 0; i < length; i++) {
583 if (array[i]->origin /* naked field! */) {
584 array[i]->print_as_flag(out);
585 out->print(" ");
586 }
587 }
588 out->cr();
589 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
590 }
591
592 #ifndef PRODUCT
593
594
595 void CommandLineFlags::verify() {
596 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
597 }
598
599 #endif // PRODUCT
600
601 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
602 // Print the flags sorted by name
603 // note: this method is called before the thread structure is in place
604 // which means resource allocation cannot be used.
605
606 // Compute size
607 int length= 0;
608 while (flagTable[length].name != NULL) length++;
609
610 // Sort
611 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
612 for (int index = 0; index < length; index++) {
613 array[index] = &flagTable[index];
614 }
615 qsort(array, length, sizeof(Flag*), compare_flags);
616
617 // Print
618 out->print_cr("[Global flags]");
619 for (int i = 0; i < length; i++) {
620 if (array[i]->is_unlocked()) {
621 array[i]->print_on(out, withComments);
622 }
623 }
624 FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
625 }