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 "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/top.hpp"
33 #ifndef SERIALGC
34 #include "gc_implementation/g1/g1_globals.hpp"
35 #endif
36 #ifdef COMPILER1
37 #include "c1/c1_globals.hpp"
38 #endif
39 #ifdef COMPILER2
40 #include "opto/c2_globals.hpp"
41 #endif
42 #ifdef SHARK
43 #include "shark/shark_globals.hpp"
44 #endif
45
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 bool Flag::is_unlocker() const {
59 return strcmp(name, "UnlockDiagnosticVMOptions") == 0 ||
60 strcmp(name, "UnlockExperimentalVMOptions") == 0;
61
62 }
63
64 bool Flag::is_unlocked() const {
65 if (strcmp(kind, "{diagnostic}") == 0) {
66 return UnlockDiagnosticVMOptions;
67 } else if (strcmp(kind, "{experimental}") == 0 ||
68 strcmp(kind, "{C2 experimental}") == 0) {
69 return UnlockExperimentalVMOptions;
70 } else {
71 return true;
72 }
73 }
74
75 bool Flag::is_writeable() const {
76 return (strcmp(kind, "{manageable}") == 0 || strcmp(kind, "{product rw}") == 0);
77 }
78
79 // All flags except "manageable" are assumed internal flags.
80 // Long term, we need to define a mechanism to specify which flags
81 // are external/stable and change this function accordingly.
82 bool Flag::is_external() const {
83 return (strcmp(kind, "{manageable}") == 0);
84 }
85
86 // Length of format string (e.g. "%.1234s") for printing ccstr below
87 #define FORMAT_BUFFER_LEN 16
88
89 void Flag::print_on(outputStream* st, bool withComments) {
90 st->print("%9s %-40s %c= ", type, name, (origin != DEFAULT ? ':' : ' '));
91 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false");
92 if (is_intx()) st->print("%-16ld", get_intx());
93 if (is_uintx()) st->print("%-16lu", get_uintx());
94 if (is_uint64_t()) st->print("%-16lu", get_uint64_t());
95 if (is_double()) st->print("%-16f", get_double());
96
97 if (is_ccstr()) {
98 const char* cp = get_ccstr();
99 if (cp != NULL) {
100 const char* eol;
101 while ((eol = strchr(cp, '\n')) != NULL) {
102 char format_buffer[FORMAT_BUFFER_LEN];
103 size_t llen = pointer_delta(eol, cp, sizeof(char));
104 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
105 "%%." SIZE_FORMAT "s", llen);
106 st->print(format_buffer, cp);
107 st->cr();
108 cp = eol+1;
109 st->print("%5s %-35s += ", "", name);
110 }
111 st->print("%-16s", cp);
112 }
113 else st->print("%-16s", "");
114 }
115 st->print("%-20s", kind);
116 if (withComments) {
117 #ifndef PRODUCT
118 st->print("%s", doc );
119 #endif
120 }
121 st->cr();
122 }
123
124 void Flag::print_as_flag(outputStream* st) {
125 if (is_bool()) {
126 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
127 } else if (is_intx()) {
128 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
129 } else if (is_uintx()) {
130 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
131 } else if (is_uint64_t()) {
132 st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
133 } else if (is_ccstr()) {
134 st->print("-XX:%s=", name);
135 const char* cp = get_ccstr();
136 if (cp != NULL) {
137 // Need to turn embedded '\n's back into separate arguments
138 // Not so efficient to print one character at a time,
139 // but the choice is to do the transformation to a buffer
140 // and print that. And this need not be efficient.
141 for (; *cp != '\0'; cp += 1) {
142 switch (*cp) {
143 default:
144 st->print("%c", *cp);
145 break;
146 case '\n':
147 st->print(" -XX:%s=", name);
148 break;
149 }
150 }
151 }
152 } else {
153 ShouldNotReachHere();
154 }
155 }
156
157 // 4991491 do not "optimize out" the was_set false values: omitting them
158 // tickles a Microsoft compiler bug causing flagTable to be malformed
159
160 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product}", DEFAULT },
161 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{pd product}", DEFAULT },
162 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{diagnostic}", DEFAULT },
163 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{experimental}", DEFAULT },
164 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{manageable}", DEFAULT },
165 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product rw}", DEFAULT },
166
167 #ifdef PRODUCT
168 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
169 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
170 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
171 #else
172 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "", DEFAULT },
173 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{pd}", DEFAULT },
174 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{notproduct}", DEFAULT },
175 #endif
176
177 #ifdef _LP64
178 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{lp64_product}", DEFAULT },
179 #else
180 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
181 #endif // _LP64
182
183 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 product}", DEFAULT },
184 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 pd product}", DEFAULT },
185 #ifdef PRODUCT
186 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
187 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
188 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
189 #else
190 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1}", DEFAULT },
191 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C1 pd}", DEFAULT },
192 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1 notproduct}", DEFAULT },
193 #endif
194
195
196 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 product}", DEFAULT },
197 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 pd product}", DEFAULT },
198 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 diagnostic}", DEFAULT },
199 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 experimental}", DEFAULT },
200 #ifdef PRODUCT
201 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
202 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
203 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
204 #else
205 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2}", DEFAULT },
206 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C2 pd}", DEFAULT },
207 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2 notproduct}", DEFAULT },
208 #endif
209
210 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark product}", DEFAULT },
211 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark pd product}", DEFAULT },
212 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark diagnostic}", DEFAULT },
213 #ifdef PRODUCT
214 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
215 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
216 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
217 #else
218 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark}", DEFAULT },
219 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{Shark pd}", DEFAULT },
220 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark notproduct}", DEFAULT },
221 #endif
222
223 static Flag flagTable[] = {
224 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)
225 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)
226 #ifndef SERIALGC
227 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)
228 #endif // SERIALGC
229 #ifdef COMPILER1
230 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
231 #endif
232 #ifdef COMPILER2
233 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)
234 #endif
235 #ifdef SHARK
236 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)
237 #endif
238 {0, NULL, NULL}
239 };
240
241 Flag* Flag::flags = flagTable;
242 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
243
244 inline bool str_equal(const char* s, char* q, size_t len) {
245 // s is null terminated, q is not!
246 if (strlen(s) != (unsigned int) len) return false;
247 return strncmp(s, q, len) == 0;
248 }
249
250 Flag* Flag::find_flag(char* name, size_t length) {
251 for (Flag* current = &flagTable[0]; current->name; current++) {
252 if (str_equal(current->name, name, length)) {
253 if (!(current->is_unlocked() || current->is_unlocker())) {
254 // disable use of diagnostic or experimental flags until they
255 // are explicitly unlocked
256 return NULL;
257 }
258 return current;
259 }
260 }
261 return NULL;
262 }
263
264 // Returns the address of the index'th element
265 static Flag* address_of_flag(CommandLineFlagWithType flag) {
266 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
267 return &Flag::flags[flag];
268 }
269
270 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
271 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
272 Flag* f = &Flag::flags[flag];
273 return (f->origin == DEFAULT);
274 }
275
276 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
277 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
278 Flag* f = &Flag::flags[flag];
279 return (f->origin == ERGONOMIC);
280 }
281
282 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
283 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
284 Flag* f = &Flag::flags[flag];
285 return (f->origin == COMMAND_LINE);
286 }
287
288 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
289 Flag* result = Flag::find_flag((char*)name, strlen(name));
290 if (result == NULL) return false;
291 *value = (result->origin == COMMAND_LINE);
292 return true;
293 }
294
295 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
296 Flag* result = Flag::find_flag(name, len);
297 if (result == NULL) return false;
298 if (!result->is_bool()) return false;
299 *value = result->get_bool();
300 return true;
301 }
302
303 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
304 Flag* result = Flag::find_flag(name, len);
305 if (result == NULL) return false;
306 if (!result->is_bool()) return false;
307 bool old_value = result->get_bool();
308 result->set_bool(*value);
309 *value = old_value;
310 result->origin = origin;
311 return true;
312 }
313
314 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
315 Flag* faddr = address_of_flag(flag);
316 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
317 faddr->set_bool(value);
318 faddr->origin = origin;
319 }
320
321 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
322 Flag* result = Flag::find_flag(name, len);
323 if (result == NULL) return false;
324 if (!result->is_intx()) return false;
325 *value = result->get_intx();
326 return true;
327 }
328
329 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
330 Flag* result = Flag::find_flag(name, len);
331 if (result == NULL) return false;
332 if (!result->is_intx()) return false;
333 intx old_value = result->get_intx();
334 result->set_intx(*value);
335 *value = old_value;
336 result->origin = origin;
337 return true;
338 }
339
340 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
341 Flag* faddr = address_of_flag(flag);
342 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
343 faddr->set_intx(value);
344 faddr->origin = origin;
345 }
346
347 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
348 Flag* result = Flag::find_flag(name, len);
349 if (result == NULL) return false;
350 if (!result->is_uintx()) return false;
351 *value = result->get_uintx();
352 return true;
353 }
354
355 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
356 Flag* result = Flag::find_flag(name, len);
357 if (result == NULL) return false;
358 if (!result->is_uintx()) return false;
359 uintx old_value = result->get_uintx();
360 result->set_uintx(*value);
361 *value = old_value;
362 result->origin = origin;
363 return true;
364 }
365
366 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
367 Flag* faddr = address_of_flag(flag);
368 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
369 faddr->set_uintx(value);
370 faddr->origin = origin;
371 }
372
373 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
374 Flag* result = Flag::find_flag(name, len);
375 if (result == NULL) return false;
376 if (!result->is_uint64_t()) return false;
377 *value = result->get_uint64_t();
378 return true;
379 }
380
381 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
382 Flag* result = Flag::find_flag(name, len);
383 if (result == NULL) return false;
384 if (!result->is_uint64_t()) return false;
385 uint64_t old_value = result->get_uint64_t();
386 result->set_uint64_t(*value);
387 *value = old_value;
388 result->origin = origin;
389 return true;
390 }
391
392 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
393 Flag* faddr = address_of_flag(flag);
394 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
395 faddr->set_uint64_t(value);
396 faddr->origin = origin;
397 }
398
399 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
400 Flag* result = Flag::find_flag(name, len);
401 if (result == NULL) return false;
402 if (!result->is_double()) return false;
403 *value = result->get_double();
404 return true;
405 }
406
407 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
408 Flag* result = Flag::find_flag(name, len);
409 if (result == NULL) return false;
410 if (!result->is_double()) return false;
411 double old_value = result->get_double();
412 result->set_double(*value);
413 *value = old_value;
414 result->origin = origin;
415 return true;
416 }
417
418 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
419 Flag* faddr = address_of_flag(flag);
420 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
421 faddr->set_double(value);
422 faddr->origin = origin;
423 }
424
425 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
426 Flag* result = Flag::find_flag(name, len);
427 if (result == NULL) return false;
428 if (!result->is_ccstr()) return false;
429 *value = result->get_ccstr();
430 return true;
431 }
432
433 // Contract: Flag will make private copy of the incoming value.
434 // Outgoing value is always malloc-ed, and caller MUST call free.
435 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
436 Flag* result = Flag::find_flag(name, len);
437 if (result == NULL) return false;
438 if (!result->is_ccstr()) return false;
439 ccstr old_value = result->get_ccstr();
440 char* new_value = NULL;
441 if (*value != NULL) {
442 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
443 strcpy(new_value, *value);
444 }
445 result->set_ccstr(new_value);
446 if (result->origin == DEFAULT && old_value != NULL) {
447 // Prior value is NOT heap allocated, but was a literal constant.
448 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
449 strcpy(old_value_to_free, old_value);
450 old_value = old_value_to_free;
451 }
452 *value = old_value;
453 result->origin = origin;
454 return true;
455 }
456
457 // Contract: Flag will make private copy of the incoming value.
458 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
459 Flag* faddr = address_of_flag(flag);
460 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
461 ccstr old_value = faddr->get_ccstr();
462 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
463 strcpy(new_value, value);
464 faddr->set_ccstr(new_value);
465 if (faddr->origin != DEFAULT && old_value != NULL) {
466 // Prior value is heap allocated so free it.
467 FREE_C_HEAP_ARRAY(char, old_value);
468 }
469 faddr->origin = origin;
470 }
471
472 extern "C" {
473 static int compare_flags(const void* void_a, const void* void_b) {
474 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
475 }
476 }
477
478 void CommandLineFlags::printSetFlags() {
479 // Print which flags were set on the command line
480 // note: this method is called before the thread structure is in place
481 // which means resource allocation cannot be used.
482
483 // Compute size
484 int length= 0;
485 while (flagTable[length].name != NULL) length++;
486
487 // Sort
488 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
489 for (int index = 0; index < length; index++) {
490 array[index] = &flagTable[index];
491 }
492 qsort(array, length, sizeof(Flag*), compare_flags);
493
494 // Print
495 for (int i = 0; i < length; i++) {
496 if (array[i]->origin /* naked field! */) {
497 array[i]->print_as_flag(tty);
498 tty->print(" ");
499 }
500 }
501 tty->cr();
502 FREE_C_HEAP_ARRAY(Flag*, array);
503 }
504
505 #ifndef PRODUCT
506
507
508 void CommandLineFlags::verify() {
509 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
510 }
511
512 #endif // PRODUCT
513
514 void CommandLineFlags::printFlags(bool withComments) {
515 // Print the flags sorted by name
516 // note: this method is called before the thread structure is in place
517 // which means resource allocation cannot be used.
518
519 // Compute size
520 int length= 0;
521 while (flagTable[length].name != NULL) length++;
522
523 // Sort
524 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
525 for (int index = 0; index < length; index++) {
526 array[index] = &flagTable[index];
527 }
528 qsort(array, length, sizeof(Flag*), compare_flags);
529
530 // Print
531 tty->print_cr("[Global flags]");
532 for (int i = 0; i < length; i++) {
533 if (array[i]->is_unlocked()) {
534 array[i]->print_on(tty, withComments);
535 }
536 }
537 FREE_C_HEAP_ARRAY(Flag*, array);
538 }