1 /*
2 * Copyright (c) 1997, 2010, 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 "incls/_precompiled.incl"
26 # include "incls/_globals.cpp.incl"
27
28
29 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
30 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
31 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
32 MATERIALIZE_NOTPRODUCT_FLAG, \
33 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
34 MATERIALIZE_LP64_PRODUCT_FLAG)
35
36 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
37 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
38 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
39
40 bool Flag::is_unlocker() const {
41 return strcmp(name, "UnlockDiagnosticVMOptions") == 0 ||
42 strcmp(name, "UnlockExperimentalVMOptions") == 0;
43
44 }
45
46 bool Flag::is_unlocked() const {
47 if (strcmp(kind, "{diagnostic}") == 0) {
48 return UnlockDiagnosticVMOptions;
49 } else if (strcmp(kind, "{experimental}") == 0 ||
50 strcmp(kind, "{C2 experimental}") == 0) {
51 return UnlockExperimentalVMOptions;
52 } else {
53 return true;
54 }
55 }
56
57 bool Flag::is_writeable() const {
58 return (strcmp(kind, "{manageable}") == 0 || strcmp(kind, "{product rw}") == 0);
59 }
60
61 // All flags except "manageable" are assumed internal flags.
62 // Long term, we need to define a mechanism to specify which flags
63 // are external/stable and change this function accordingly.
64 bool Flag::is_external() const {
65 return (strcmp(kind, "{manageable}") == 0);
66 }
67
68 // Length of format string (e.g. "%.1234s") for printing ccstr below
69 #define FORMAT_BUFFER_LEN 16
70
71 void Flag::print_on(outputStream* st, bool withComments) {
72 st->print("%9s %-40s %c= ", type, name, (origin != DEFAULT ? ':' : ' '));
73 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false");
74 if (is_intx()) st->print("%-16ld", get_intx());
75 if (is_uintx()) st->print("%-16lu", get_uintx());
76 if (is_uint64_t()) st->print("%-16lu", get_uint64_t());
77 if (is_double()) st->print("%-16f", get_double());
78
79 if (is_ccstr()) {
80 const char* cp = get_ccstr();
81 if (cp != NULL) {
82 const char* eol;
83 while ((eol = strchr(cp, '\n')) != NULL) {
84 char format_buffer[FORMAT_BUFFER_LEN];
85 size_t llen = pointer_delta(eol, cp, sizeof(char));
86 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
87 "%%." SIZE_FORMAT "s", llen);
88 st->print(format_buffer, cp);
89 st->cr();
90 cp = eol+1;
91 st->print("%5s %-35s += ", "", name);
92 }
93 st->print("%-16s", cp);
94 }
95 else st->print("%-16s", "");
96 }
97 st->print("%-20s", kind);
98 if (withComments) {
99 #ifndef PRODUCT
100 st->print("%s", doc );
101 #endif
102 }
103 st->cr();
104 }
105
106 void Flag::print_as_flag(outputStream* st) {
107 if (is_bool()) {
108 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
109 } else if (is_intx()) {
110 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
111 } else if (is_uintx()) {
112 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
113 } else if (is_uint64_t()) {
114 st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
115 } else if (is_ccstr()) {
116 st->print("-XX:%s=", name);
117 const char* cp = get_ccstr();
118 if (cp != NULL) {
119 // Need to turn embedded '\n's back into separate arguments
120 // Not so efficient to print one character at a time,
121 // but the choice is to do the transformation to a buffer
122 // and print that. And this need not be efficient.
123 for (; *cp != '\0'; cp += 1) {
124 switch (*cp) {
125 default:
126 st->print("%c", *cp);
127 break;
128 case '\n':
129 st->print(" -XX:%s=", name);
130 break;
131 }
132 }
133 }
134 } else {
135 ShouldNotReachHere();
136 }
137 }
138
139 // 4991491 do not "optimize out" the was_set false values: omitting them
140 // tickles a Microsoft compiler bug causing flagTable to be malformed
141
142 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product}", DEFAULT },
143 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{pd product}", DEFAULT },
144 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{diagnostic}", DEFAULT },
145 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{experimental}", DEFAULT },
146 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{manageable}", DEFAULT },
147 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product rw}", DEFAULT },
148
149 #ifdef PRODUCT
150 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
151 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
152 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
153 #else
154 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "", DEFAULT },
155 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{pd}", DEFAULT },
156 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{notproduct}", DEFAULT },
157 #endif
158
159 #ifdef _LP64
160 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{lp64_product}", DEFAULT },
161 #else
162 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
163 #endif // _LP64
164
165 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 product}", DEFAULT },
166 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 pd product}", DEFAULT },
167 #ifdef PRODUCT
168 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
169 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
170 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
171 #else
172 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1}", DEFAULT },
173 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C1 pd}", DEFAULT },
174 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1 notproduct}", DEFAULT },
175 #endif
176
177
178 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 product}", DEFAULT },
179 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 pd product}", DEFAULT },
180 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 diagnostic}", DEFAULT },
181 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 experimental}", DEFAULT },
182 #ifdef PRODUCT
183 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
184 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
185 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
186 #else
187 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2}", DEFAULT },
188 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C2 pd}", DEFAULT },
189 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2 notproduct}", DEFAULT },
190 #endif
191
192 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark product}", DEFAULT },
193 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark pd product}", DEFAULT },
194 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark diagnostic}", DEFAULT },
195 #ifdef PRODUCT
196 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
197 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
198 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
199 #else
200 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark}", DEFAULT },
201 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{Shark pd}", DEFAULT },
202 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark notproduct}", DEFAULT },
203 #endif
204
205 static Flag flagTable[] = {
206 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)
207 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)
208 #ifndef SERIALGC
209 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)
210 #endif // SERIALGC
211 #ifdef COMPILER1
212 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
213 #endif
214 #ifdef COMPILER2
215 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)
216 #endif
217 #ifdef SHARK
218 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)
219 #endif
220 {0, NULL, NULL}
221 };
222
223 Flag* Flag::flags = flagTable;
224 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
225
226 inline bool str_equal(const char* s, char* q, size_t len) {
227 // s is null terminated, q is not!
228 if (strlen(s) != (unsigned int) len) return false;
229 return strncmp(s, q, len) == 0;
230 }
231
232 Flag* Flag::find_flag(char* name, size_t length) {
233 for (Flag* current = &flagTable[0]; current->name; current++) {
234 if (str_equal(current->name, name, length)) {
235 if (!(current->is_unlocked() || current->is_unlocker())) {
236 // disable use of diagnostic or experimental flags until they
237 // are explicitly unlocked
238 return NULL;
239 }
240 return current;
241 }
242 }
243 return NULL;
244 }
245
246 // Returns the address of the index'th element
247 static Flag* address_of_flag(CommandLineFlagWithType flag) {
248 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
249 return &Flag::flags[flag];
250 }
251
252 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
253 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
254 Flag* f = &Flag::flags[flag];
255 return (f->origin == DEFAULT);
256 }
257
258 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
259 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
260 Flag* f = &Flag::flags[flag];
261 return (f->origin == ERGONOMIC);
262 }
263
264 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
265 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
266 Flag* f = &Flag::flags[flag];
267 return (f->origin == COMMAND_LINE);
268 }
269
270 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
271 Flag* result = Flag::find_flag((char*)name, strlen(name));
272 if (result == NULL) return false;
273 *value = (result->origin == COMMAND_LINE);
274 return true;
275 }
276
277 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
278 Flag* result = Flag::find_flag(name, len);
279 if (result == NULL) return false;
280 if (!result->is_bool()) return false;
281 *value = result->get_bool();
282 return true;
283 }
284
285 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
286 Flag* result = Flag::find_flag(name, len);
287 if (result == NULL) return false;
288 if (!result->is_bool()) return false;
289 bool old_value = result->get_bool();
290 result->set_bool(*value);
291 *value = old_value;
292 result->origin = origin;
293 return true;
294 }
295
296 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
297 Flag* faddr = address_of_flag(flag);
298 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
299 faddr->set_bool(value);
300 faddr->origin = origin;
301 }
302
303 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
304 Flag* result = Flag::find_flag(name, len);
305 if (result == NULL) return false;
306 if (!result->is_intx()) return false;
307 *value = result->get_intx();
308 return true;
309 }
310
311 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
312 Flag* result = Flag::find_flag(name, len);
313 if (result == NULL) return false;
314 if (!result->is_intx()) return false;
315 intx old_value = result->get_intx();
316 result->set_intx(*value);
317 *value = old_value;
318 result->origin = origin;
319 return true;
320 }
321
322 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
323 Flag* faddr = address_of_flag(flag);
324 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
325 faddr->set_intx(value);
326 faddr->origin = origin;
327 }
328
329 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
330 Flag* result = Flag::find_flag(name, len);
331 if (result == NULL) return false;
332 if (!result->is_uintx()) return false;
333 *value = result->get_uintx();
334 return true;
335 }
336
337 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
338 Flag* result = Flag::find_flag(name, len);
339 if (result == NULL) return false;
340 if (!result->is_uintx()) return false;
341 uintx old_value = result->get_uintx();
342 result->set_uintx(*value);
343 *value = old_value;
344 result->origin = origin;
345 return true;
346 }
347
348 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
349 Flag* faddr = address_of_flag(flag);
350 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
351 faddr->set_uintx(value);
352 faddr->origin = origin;
353 }
354
355 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
356 Flag* result = Flag::find_flag(name, len);
357 if (result == NULL) return false;
358 if (!result->is_uint64_t()) return false;
359 *value = result->get_uint64_t();
360 return true;
361 }
362
363 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
364 Flag* result = Flag::find_flag(name, len);
365 if (result == NULL) return false;
366 if (!result->is_uint64_t()) return false;
367 uint64_t old_value = result->get_uint64_t();
368 result->set_uint64_t(*value);
369 *value = old_value;
370 result->origin = origin;
371 return true;
372 }
373
374 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
375 Flag* faddr = address_of_flag(flag);
376 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
377 faddr->set_uint64_t(value);
378 faddr->origin = origin;
379 }
380
381 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
382 Flag* result = Flag::find_flag(name, len);
383 if (result == NULL) return false;
384 if (!result->is_double()) return false;
385 *value = result->get_double();
386 return true;
387 }
388
389 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
390 Flag* result = Flag::find_flag(name, len);
391 if (result == NULL) return false;
392 if (!result->is_double()) return false;
393 double old_value = result->get_double();
394 result->set_double(*value);
395 *value = old_value;
396 result->origin = origin;
397 return true;
398 }
399
400 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
401 Flag* faddr = address_of_flag(flag);
402 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
403 faddr->set_double(value);
404 faddr->origin = origin;
405 }
406
407 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
408 Flag* result = Flag::find_flag(name, len);
409 if (result == NULL) return false;
410 if (!result->is_ccstr()) return false;
411 *value = result->get_ccstr();
412 return true;
413 }
414
415 // Contract: Flag will make private copy of the incoming value.
416 // Outgoing value is always malloc-ed, and caller MUST call free.
417 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
418 Flag* result = Flag::find_flag(name, len);
419 if (result == NULL) return false;
420 if (!result->is_ccstr()) return false;
421 ccstr old_value = result->get_ccstr();
422 char* new_value = NULL;
423 if (*value != NULL) {
424 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
425 strcpy(new_value, *value);
426 }
427 result->set_ccstr(new_value);
428 if (result->origin == DEFAULT && old_value != NULL) {
429 // Prior value is NOT heap allocated, but was a literal constant.
430 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
431 strcpy(old_value_to_free, old_value);
432 old_value = old_value_to_free;
433 }
434 *value = old_value;
435 result->origin = origin;
436 return true;
437 }
438
439 // Contract: Flag will make private copy of the incoming value.
440 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
441 Flag* faddr = address_of_flag(flag);
442 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
443 ccstr old_value = faddr->get_ccstr();
444 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
445 strcpy(new_value, value);
446 faddr->set_ccstr(new_value);
447 if (faddr->origin != DEFAULT && old_value != NULL) {
448 // Prior value is heap allocated so free it.
449 FREE_C_HEAP_ARRAY(char, old_value);
450 }
451 faddr->origin = origin;
452 }
453
454 extern "C" {
455 static int compare_flags(const void* void_a, const void* void_b) {
456 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
457 }
458 }
459
460 void CommandLineFlags::printSetFlags() {
461 // Print which flags were set on the command line
462 // note: this method is called before the thread structure is in place
463 // which means resource allocation cannot be used.
464
465 // Compute size
466 int length= 0;
467 while (flagTable[length].name != NULL) length++;
468
469 // Sort
470 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
471 for (int index = 0; index < length; index++) {
472 array[index] = &flagTable[index];
473 }
474 qsort(array, length, sizeof(Flag*), compare_flags);
475
476 // Print
477 for (int i = 0; i < length; i++) {
478 if (array[i]->origin /* naked field! */) {
479 array[i]->print_as_flag(tty);
480 tty->print(" ");
481 }
482 }
483 tty->cr();
484 FREE_C_HEAP_ARRAY(Flag*, array);
485 }
486
487 #ifndef PRODUCT
488
489
490 void CommandLineFlags::verify() {
491 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
492 }
493
494 #endif // PRODUCT
495
496 void CommandLineFlags::printFlags(bool withComments) {
497 // Print the flags sorted by name
498 // note: this method is called before the thread structure is in place
499 // which means resource allocation cannot be used.
500
501 // Compute size
502 int length= 0;
503 while (flagTable[length].name != NULL) length++;
504
505 // Sort
506 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
507 for (int index = 0; index < length; index++) {
508 array[index] = &flagTable[index];
509 }
510 qsort(array, length, sizeof(Flag*), compare_flags);
511
512 // Print
513 tty->print_cr("[Global flags]");
514 for (int i = 0; i < length; i++) {
515 if (array[i]->is_unlocked()) {
516 array[i]->print_on(tty, withComments);
517 }
518 }
519 FREE_C_HEAP_ARRAY(Flag*, array);
520 }