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src/share/vm/runtime/globals.cpp@d6f45b55c972
src/share/vm/runtime/globals.cpp
Fri, 27 Aug 2010 17:33:49 -0700
- author
- never
- date
- Fri, 27 Aug 2010 17:33:49 -0700
- changeset 2118
- d6f45b55c972
- parent 2047
- d2ede61b7a12
- child 2123
- 6ee479178066
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- -rw-r--r--
4809552: Optimize Arrays.fill(...)
Reviewed-by: kvn
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 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_globals.cpp.incl"
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)
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)
40 bool Flag::is_unlocker() const {
41 return strcmp(name, "UnlockDiagnosticVMOptions") == 0 ||
42 strcmp(name, "UnlockExperimentalVMOptions") == 0;
44 }
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 }
57 bool Flag::is_writeable() const {
58 return (strcmp(kind, "{manageable}") == 0 || strcmp(kind, "{product rw}") == 0);
59 }
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 }
68 // Length of format string (e.g. "%.1234s") for printing ccstr below
69 #define FORMAT_BUFFER_LEN 16
71 void Flag::print_on(outputStream* st) {
72 st->print("%5s %-35s %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_ccstr()) {
78 const char* cp = get_ccstr();
79 if (cp != NULL) {
80 const char* eol;
81 while ((eol = strchr(cp, '\n')) != NULL) {
82 char format_buffer[FORMAT_BUFFER_LEN];
83 size_t llen = pointer_delta(eol, cp, sizeof(char));
84 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
85 "%%." SIZE_FORMAT "s", llen);
86 st->print(format_buffer, cp);
87 st->cr();
88 cp = eol+1;
89 st->print("%5s %-35s += ", "", name);
90 }
91 st->print("%-16s", cp);
92 }
93 }
94 st->print(" %s", kind);
95 st->cr();
96 }
98 void Flag::print_as_flag(outputStream* st) {
99 if (is_bool()) {
100 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
101 } else if (is_intx()) {
102 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
103 } else if (is_uintx()) {
104 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
105 } else if (is_uint64_t()) {
106 st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
107 } else if (is_ccstr()) {
108 st->print("-XX:%s=", name);
109 const char* cp = get_ccstr();
110 if (cp != NULL) {
111 // Need to turn embedded '\n's back into separate arguments
112 // Not so efficient to print one character at a time,
113 // but the choice is to do the transformation to a buffer
114 // and print that. And this need not be efficient.
115 for (; *cp != '\0'; cp += 1) {
116 switch (*cp) {
117 default:
118 st->print("%c", *cp);
119 break;
120 case '\n':
121 st->print(" -XX:%s=", name);
122 break;
123 }
124 }
125 }
126 } else {
127 ShouldNotReachHere();
128 }
129 }
131 // 4991491 do not "optimize out" the was_set false values: omitting them
132 // tickles a Microsoft compiler bug causing flagTable to be malformed
134 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product}", DEFAULT },
135 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd product}", DEFAULT },
136 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{diagnostic}", DEFAULT },
137 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{experimental}", DEFAULT },
138 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{manageable}", DEFAULT },
139 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product rw}", DEFAULT },
141 #ifdef PRODUCT
142 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
143 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
144 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
145 #else
146 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "", DEFAULT },
147 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd}", DEFAULT },
148 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{notproduct}", DEFAULT },
149 #endif
151 #ifdef _LP64
152 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{lp64_product}", DEFAULT },
153 #else
154 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
155 #endif // _LP64
157 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 product}", DEFAULT },
158 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd product}", DEFAULT },
159 #ifdef PRODUCT
160 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
161 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
162 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
163 #else
164 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1}", DEFAULT },
165 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd}", DEFAULT },
166 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 notproduct}", DEFAULT },
167 #endif
170 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 product}", DEFAULT },
171 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd product}", DEFAULT },
172 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 diagnostic}", DEFAULT },
173 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 experimental}", DEFAULT },
174 #ifdef PRODUCT
175 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
176 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
177 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
178 #else
179 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2}", DEFAULT },
180 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd}", DEFAULT },
181 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 notproduct}", DEFAULT },
182 #endif
184 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{Shark product}", DEFAULT },
185 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{Shark pd product}", DEFAULT },
186 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{Shark diagnostic}", DEFAULT },
187 #ifdef PRODUCT
188 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
189 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
190 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
191 #else
192 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{Shark}", DEFAULT },
193 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{Shark pd}", DEFAULT },
194 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{Shark notproduct}", DEFAULT },
195 #endif
197 static Flag flagTable[] = {
198 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)
199 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)
200 #ifndef SERIALGC
201 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)
202 #endif // SERIALGC
203 #ifdef COMPILER1
204 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
205 #endif
206 #ifdef COMPILER2
207 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)
208 #endif
209 #ifdef SHARK
210 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)
211 #endif
212 {0, NULL, NULL}
213 };
215 Flag* Flag::flags = flagTable;
216 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
218 inline bool str_equal(const char* s, char* q, size_t len) {
219 // s is null terminated, q is not!
220 if (strlen(s) != (unsigned int) len) return false;
221 return strncmp(s, q, len) == 0;
222 }
224 Flag* Flag::find_flag(char* name, size_t length) {
225 for (Flag* current = &flagTable[0]; current->name; current++) {
226 if (str_equal(current->name, name, length)) {
227 if (!(current->is_unlocked() || current->is_unlocker())) {
228 // disable use of diagnostic or experimental flags until they
229 // are explicitly unlocked
230 return NULL;
231 }
232 return current;
233 }
234 }
235 return NULL;
236 }
238 // Returns the address of the index'th element
239 static Flag* address_of_flag(CommandLineFlagWithType flag) {
240 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
241 return &Flag::flags[flag];
242 }
244 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
245 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
246 Flag* f = &Flag::flags[flag];
247 return (f->origin == DEFAULT);
248 }
250 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
251 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
252 Flag* f = &Flag::flags[flag];
253 return (f->origin == ERGONOMIC);
254 }
256 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
257 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
258 Flag* f = &Flag::flags[flag];
259 return (f->origin == COMMAND_LINE);
260 }
262 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
263 Flag* result = Flag::find_flag((char*)name, strlen(name));
264 if (result == NULL) return false;
265 *value = (result->origin == COMMAND_LINE);
266 return true;
267 }
269 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
270 Flag* result = Flag::find_flag(name, len);
271 if (result == NULL) return false;
272 if (!result->is_bool()) return false;
273 *value = result->get_bool();
274 return true;
275 }
277 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
278 Flag* result = Flag::find_flag(name, len);
279 if (result == NULL) return false;
280 if (!result->is_bool()) return false;
281 bool old_value = result->get_bool();
282 result->set_bool(*value);
283 *value = old_value;
284 result->origin = origin;
285 return true;
286 }
288 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
289 Flag* faddr = address_of_flag(flag);
290 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
291 faddr->set_bool(value);
292 faddr->origin = origin;
293 }
295 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
296 Flag* result = Flag::find_flag(name, len);
297 if (result == NULL) return false;
298 if (!result->is_intx()) return false;
299 *value = result->get_intx();
300 return true;
301 }
303 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
304 Flag* result = Flag::find_flag(name, len);
305 if (result == NULL) return false;
306 if (!result->is_intx()) return false;
307 intx old_value = result->get_intx();
308 result->set_intx(*value);
309 *value = old_value;
310 result->origin = origin;
311 return true;
312 }
314 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
315 Flag* faddr = address_of_flag(flag);
316 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
317 faddr->set_intx(value);
318 faddr->origin = origin;
319 }
321 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
322 Flag* result = Flag::find_flag(name, len);
323 if (result == NULL) return false;
324 if (!result->is_uintx()) return false;
325 *value = result->get_uintx();
326 return true;
327 }
329 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
330 Flag* result = Flag::find_flag(name, len);
331 if (result == NULL) return false;
332 if (!result->is_uintx()) return false;
333 uintx old_value = result->get_uintx();
334 result->set_uintx(*value);
335 *value = old_value;
336 result->origin = origin;
337 return true;
338 }
340 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
341 Flag* faddr = address_of_flag(flag);
342 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
343 faddr->set_uintx(value);
344 faddr->origin = origin;
345 }
347 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
348 Flag* result = Flag::find_flag(name, len);
349 if (result == NULL) return false;
350 if (!result->is_uint64_t()) return false;
351 *value = result->get_uint64_t();
352 return true;
353 }
355 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
356 Flag* result = Flag::find_flag(name, len);
357 if (result == NULL) return false;
358 if (!result->is_uint64_t()) return false;
359 uint64_t old_value = result->get_uint64_t();
360 result->set_uint64_t(*value);
361 *value = old_value;
362 result->origin = origin;
363 return true;
364 }
366 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
367 Flag* faddr = address_of_flag(flag);
368 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
369 faddr->set_uint64_t(value);
370 faddr->origin = origin;
371 }
373 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
374 Flag* result = Flag::find_flag(name, len);
375 if (result == NULL) return false;
376 if (!result->is_double()) return false;
377 *value = result->get_double();
378 return true;
379 }
381 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
382 Flag* result = Flag::find_flag(name, len);
383 if (result == NULL) return false;
384 if (!result->is_double()) return false;
385 double old_value = result->get_double();
386 result->set_double(*value);
387 *value = old_value;
388 result->origin = origin;
389 return true;
390 }
392 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
393 Flag* faddr = address_of_flag(flag);
394 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
395 faddr->set_double(value);
396 faddr->origin = origin;
397 }
399 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
400 Flag* result = Flag::find_flag(name, len);
401 if (result == NULL) return false;
402 if (!result->is_ccstr()) return false;
403 *value = result->get_ccstr();
404 return true;
405 }
407 // Contract: Flag will make private copy of the incoming value.
408 // Outgoing value is always malloc-ed, and caller MUST call free.
409 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
410 Flag* result = Flag::find_flag(name, len);
411 if (result == NULL) return false;
412 if (!result->is_ccstr()) return false;
413 ccstr old_value = result->get_ccstr();
414 char* new_value = NULL;
415 if (*value != NULL) {
416 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
417 strcpy(new_value, *value);
418 }
419 result->set_ccstr(new_value);
420 if (result->origin == DEFAULT && old_value != NULL) {
421 // Prior value is NOT heap allocated, but was a literal constant.
422 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
423 strcpy(old_value_to_free, old_value);
424 old_value = old_value_to_free;
425 }
426 *value = old_value;
427 result->origin = origin;
428 return true;
429 }
431 // Contract: Flag will make private copy of the incoming value.
432 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
433 Flag* faddr = address_of_flag(flag);
434 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
435 ccstr old_value = faddr->get_ccstr();
436 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
437 strcpy(new_value, value);
438 faddr->set_ccstr(new_value);
439 if (faddr->origin != DEFAULT && old_value != NULL) {
440 // Prior value is heap allocated so free it.
441 FREE_C_HEAP_ARRAY(char, old_value);
442 }
443 faddr->origin = origin;
444 }
446 extern "C" {
447 static int compare_flags(const void* void_a, const void* void_b) {
448 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
449 }
450 }
452 void CommandLineFlags::printSetFlags() {
453 // Print which flags were set on the command line
454 // note: this method is called before the thread structure is in place
455 // which means resource allocation cannot be used.
457 // Compute size
458 int length= 0;
459 while (flagTable[length].name != NULL) length++;
461 // Sort
462 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
463 for (int index = 0; index < length; index++) {
464 array[index] = &flagTable[index];
465 }
466 qsort(array, length, sizeof(Flag*), compare_flags);
468 // Print
469 for (int i = 0; i < length; i++) {
470 if (array[i]->origin /* naked field! */) {
471 array[i]->print_as_flag(tty);
472 tty->print(" ");
473 }
474 }
475 tty->cr();
476 FREE_C_HEAP_ARRAY(Flag*, array);
477 }
479 #ifndef PRODUCT
482 void CommandLineFlags::verify() {
483 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
484 }
486 #endif // PRODUCT
488 void CommandLineFlags::printFlags() {
489 // Print the flags sorted by name
490 // note: this method is called before the thread structure is in place
491 // which means resource allocation cannot be used.
493 // Compute size
494 int length= 0;
495 while (flagTable[length].name != NULL) length++;
497 // Sort
498 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
499 for (int index = 0; index < length; index++) {
500 array[index] = &flagTable[index];
501 }
502 qsort(array, length, sizeof(Flag*), compare_flags);
504 // Print
505 tty->print_cr("[Global flags]");
506 for (int i = 0; i < length; i++) {
507 if (array[i]->is_unlocked()) {
508 array[i]->print_on(tty);
509 }
510 }
511 FREE_C_HEAP_ARRAY(Flag*, array);
512 }
