Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/globals.cpp@6deeaebad47a
src/share/vm/runtime/globals.cpp
Mon, 01 Feb 2010 17:35:05 -0700
- author
- dcubed
- date
- Mon, 01 Feb 2010 17:35:05 -0700
- changeset 1648
- 6deeaebad47a
- parent 1585
- f62a22282a47
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
Summary: Rename can_post_exceptions support to can_post_on_exceptions. Add support for should_post_on_exceptions flag to permit per JavaThread optimizations.
Reviewed-by: never, kvn, dcubed
Contributed-by: tom.deneau@amd.com
1 /*
2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any 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
185 static Flag flagTable[] = {
186 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)
187 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)
188 #ifndef SERIALGC
189 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)
190 #endif // SERIALGC
191 #ifdef COMPILER1
192 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
193 #endif
194 #ifdef COMPILER2
195 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)
196 #endif
197 {0, NULL, NULL}
198 };
200 Flag* Flag::flags = flagTable;
201 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
203 inline bool str_equal(const char* s, char* q, size_t len) {
204 // s is null terminated, q is not!
205 if (strlen(s) != (unsigned int) len) return false;
206 return strncmp(s, q, len) == 0;
207 }
209 Flag* Flag::find_flag(char* name, size_t length) {
210 for (Flag* current = &flagTable[0]; current->name; current++) {
211 if (str_equal(current->name, name, length)) {
212 if (!(current->is_unlocked() || current->is_unlocker())) {
213 // disable use of diagnostic or experimental flags until they
214 // are explicitly unlocked
215 return NULL;
216 }
217 return current;
218 }
219 }
220 return NULL;
221 }
223 // Returns the address of the index'th element
224 static Flag* address_of_flag(CommandLineFlagWithType flag) {
225 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
226 return &Flag::flags[flag];
227 }
229 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
230 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
231 Flag* f = &Flag::flags[flag];
232 return (f->origin == DEFAULT);
233 }
235 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
236 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
237 Flag* f = &Flag::flags[flag];
238 return (f->origin == ERGONOMIC);
239 }
241 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
242 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
243 Flag* f = &Flag::flags[flag];
244 return (f->origin == COMMAND_LINE);
245 }
247 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
248 Flag* result = Flag::find_flag((char*)name, strlen(name));
249 if (result == NULL) return false;
250 *value = (result->origin == COMMAND_LINE);
251 return true;
252 }
254 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
255 Flag* result = Flag::find_flag(name, len);
256 if (result == NULL) return false;
257 if (!result->is_bool()) return false;
258 *value = result->get_bool();
259 return true;
260 }
262 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
263 Flag* result = Flag::find_flag(name, len);
264 if (result == NULL) return false;
265 if (!result->is_bool()) return false;
266 bool old_value = result->get_bool();
267 result->set_bool(*value);
268 *value = old_value;
269 result->origin = origin;
270 return true;
271 }
273 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
274 Flag* faddr = address_of_flag(flag);
275 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
276 faddr->set_bool(value);
277 faddr->origin = origin;
278 }
280 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
281 Flag* result = Flag::find_flag(name, len);
282 if (result == NULL) return false;
283 if (!result->is_intx()) return false;
284 *value = result->get_intx();
285 return true;
286 }
288 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
289 Flag* result = Flag::find_flag(name, len);
290 if (result == NULL) return false;
291 if (!result->is_intx()) return false;
292 intx old_value = result->get_intx();
293 result->set_intx(*value);
294 *value = old_value;
295 result->origin = origin;
296 return true;
297 }
299 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
300 Flag* faddr = address_of_flag(flag);
301 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
302 faddr->set_intx(value);
303 faddr->origin = origin;
304 }
306 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
307 Flag* result = Flag::find_flag(name, len);
308 if (result == NULL) return false;
309 if (!result->is_uintx()) return false;
310 *value = result->get_uintx();
311 return true;
312 }
314 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
315 Flag* result = Flag::find_flag(name, len);
316 if (result == NULL) return false;
317 if (!result->is_uintx()) return false;
318 uintx old_value = result->get_uintx();
319 result->set_uintx(*value);
320 *value = old_value;
321 result->origin = origin;
322 return true;
323 }
325 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
326 Flag* faddr = address_of_flag(flag);
327 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
328 faddr->set_uintx(value);
329 faddr->origin = origin;
330 }
332 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
333 Flag* result = Flag::find_flag(name, len);
334 if (result == NULL) return false;
335 if (!result->is_uint64_t()) return false;
336 *value = result->get_uint64_t();
337 return true;
338 }
340 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
341 Flag* result = Flag::find_flag(name, len);
342 if (result == NULL) return false;
343 if (!result->is_uint64_t()) return false;
344 uint64_t old_value = result->get_uint64_t();
345 result->set_uint64_t(*value);
346 *value = old_value;
347 result->origin = origin;
348 return true;
349 }
351 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
352 Flag* faddr = address_of_flag(flag);
353 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
354 faddr->set_uint64_t(value);
355 faddr->origin = origin;
356 }
358 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
359 Flag* result = Flag::find_flag(name, len);
360 if (result == NULL) return false;
361 if (!result->is_double()) return false;
362 *value = result->get_double();
363 return true;
364 }
366 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
367 Flag* result = Flag::find_flag(name, len);
368 if (result == NULL) return false;
369 if (!result->is_double()) return false;
370 double old_value = result->get_double();
371 result->set_double(*value);
372 *value = old_value;
373 result->origin = origin;
374 return true;
375 }
377 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
378 Flag* faddr = address_of_flag(flag);
379 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
380 faddr->set_double(value);
381 faddr->origin = origin;
382 }
384 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
385 Flag* result = Flag::find_flag(name, len);
386 if (result == NULL) return false;
387 if (!result->is_ccstr()) return false;
388 *value = result->get_ccstr();
389 return true;
390 }
392 // Contract: Flag will make private copy of the incoming value.
393 // Outgoing value is always malloc-ed, and caller MUST call free.
394 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
395 Flag* result = Flag::find_flag(name, len);
396 if (result == NULL) return false;
397 if (!result->is_ccstr()) return false;
398 ccstr old_value = result->get_ccstr();
399 char* new_value = NULL;
400 if (*value != NULL) {
401 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
402 strcpy(new_value, *value);
403 }
404 result->set_ccstr(new_value);
405 if (result->origin == DEFAULT && old_value != NULL) {
406 // Prior value is NOT heap allocated, but was a literal constant.
407 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
408 strcpy(old_value_to_free, old_value);
409 old_value = old_value_to_free;
410 }
411 *value = old_value;
412 result->origin = origin;
413 return true;
414 }
416 // Contract: Flag will make private copy of the incoming value.
417 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
418 Flag* faddr = address_of_flag(flag);
419 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
420 ccstr old_value = faddr->get_ccstr();
421 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
422 strcpy(new_value, value);
423 faddr->set_ccstr(new_value);
424 if (faddr->origin != DEFAULT && old_value != NULL) {
425 // Prior value is heap allocated so free it.
426 FREE_C_HEAP_ARRAY(char, old_value);
427 }
428 faddr->origin = origin;
429 }
431 extern "C" {
432 static int compare_flags(const void* void_a, const void* void_b) {
433 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
434 }
435 }
437 void CommandLineFlags::printSetFlags() {
438 // Print which flags were set on the command line
439 // note: this method is called before the thread structure is in place
440 // which means resource allocation cannot be used.
442 // Compute size
443 int length= 0;
444 while (flagTable[length].name != NULL) length++;
446 // Sort
447 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
448 for (int index = 0; index < length; index++) {
449 array[index] = &flagTable[index];
450 }
451 qsort(array, length, sizeof(Flag*), compare_flags);
453 // Print
454 for (int i = 0; i < length; i++) {
455 if (array[i]->origin /* naked field! */) {
456 array[i]->print_as_flag(tty);
457 tty->print(" ");
458 }
459 }
460 tty->cr();
461 FREE_C_HEAP_ARRAY(Flag*, array);
462 }
464 #ifndef PRODUCT
467 void CommandLineFlags::verify() {
468 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
469 }
471 #endif // PRODUCT
473 void CommandLineFlags::printFlags() {
474 // Print the flags sorted by name
475 // note: this method is called before the thread structure is in place
476 // which means resource allocation cannot be used.
478 // Compute size
479 int length= 0;
480 while (flagTable[length].name != NULL) length++;
482 // Sort
483 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
484 for (int index = 0; index < length; index++) {
485 array[index] = &flagTable[index];
486 }
487 qsort(array, length, sizeof(Flag*), compare_flags);
489 // Print
490 tty->print_cr("[Global flags]");
491 for (int i = 0; i < length; i++) {
492 if (array[i]->is_unlocked()) {
493 array[i]->print_on(tty);
494 }
495 }
496 FREE_C_HEAP_ARRAY(Flag*, array);
497 }
