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src/share/vm/runtime/globals.cpp@7432b9db36ff
src/share/vm/runtime/globals.cpp
Thu, 10 May 2012 15:44:19 +0200
- author
- nloodin
- date
- Thu, 10 May 2012 15:44:19 +0200
- changeset 3783
- 7432b9db36ff
- parent 3650
- 80fe40862b02
- child 3752
- f47478089efc
- permissions
- -rw-r--r--
7165755: OS Information much longer on linux than other platforms
Reviewed-by: sla, dholmes
1 /*
2 * Copyright (c) 1997, 2012, 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 "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
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)
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)
58 MATERIALIZE_FLAGS_EXT
61 bool Flag::is_unlocker() const {
62 return strcmp(name, "UnlockDiagnosticVMOptions") == 0 ||
63 strcmp(name, "UnlockExperimentalVMOptions") == 0 ||
64 is_unlocker_ext();
65 }
67 bool Flag::is_unlocked() const {
68 if (strcmp(kind, "{diagnostic}") == 0) {
69 if (strcmp(name, "EnableInvokeDynamic") == 0 && UnlockExperimentalVMOptions && !UnlockDiagnosticVMOptions) {
70 // transitional logic to allow tests to run until they are changed
71 static int warned;
72 if (++warned == 1) warning("Use -XX:+UnlockDiagnosticVMOptions before EnableInvokeDynamic flag");
73 return true;
74 }
75 return UnlockDiagnosticVMOptions;
76 } else if (strcmp(kind, "{experimental}") == 0 ||
77 strcmp(kind, "{C2 experimental}") == 0) {
78 return UnlockExperimentalVMOptions;
79 } else {
80 return is_unlocked_ext();
81 }
82 }
84 // Get custom message for this locked flag, or return NULL if
85 // none is available.
86 void Flag::get_locked_message(char* buf, int buflen) const {
87 get_locked_message_ext(buf, buflen);
88 }
90 bool Flag::is_writeable() const {
91 return strcmp(kind, "{manageable}") == 0 ||
92 strcmp(kind, "{product rw}") == 0 ||
93 is_writeable_ext();
94 }
96 // All flags except "manageable" are assumed to be internal flags.
97 // Long term, we need to define a mechanism to specify which flags
98 // are external/stable and change this function accordingly.
99 bool Flag::is_external() const {
100 return strcmp(kind, "{manageable}") == 0 || is_external_ext();
101 }
104 // Length of format string (e.g. "%.1234s") for printing ccstr below
105 #define FORMAT_BUFFER_LEN 16
107 void Flag::print_on(outputStream* st, bool withComments) {
108 st->print("%9s %-40s %c= ", type, name, (origin != DEFAULT ? ':' : ' '));
109 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false");
110 if (is_intx()) st->print("%-16ld", get_intx());
111 if (is_uintx()) st->print("%-16lu", get_uintx());
112 if (is_uint64_t()) st->print("%-16lu", get_uint64_t());
113 if (is_double()) st->print("%-16f", get_double());
115 if (is_ccstr()) {
116 const char* cp = get_ccstr();
117 if (cp != NULL) {
118 const char* eol;
119 while ((eol = strchr(cp, '\n')) != NULL) {
120 char format_buffer[FORMAT_BUFFER_LEN];
121 size_t llen = pointer_delta(eol, cp, sizeof(char));
122 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
123 "%%." SIZE_FORMAT "s", llen);
124 st->print(format_buffer, cp);
125 st->cr();
126 cp = eol+1;
127 st->print("%5s %-35s += ", "", name);
128 }
129 st->print("%-16s", cp);
130 }
131 else st->print("%-16s", "");
132 }
133 st->print("%-20s", kind);
134 if (withComments) {
135 #ifndef PRODUCT
136 st->print("%s", doc );
137 #endif
138 }
139 st->cr();
140 }
142 void Flag::print_as_flag(outputStream* st) {
143 if (is_bool()) {
144 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
145 } else if (is_intx()) {
146 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
147 } else if (is_uintx()) {
148 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
149 } else if (is_uint64_t()) {
150 st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
151 } else if (is_ccstr()) {
152 st->print("-XX:%s=", name);
153 const char* cp = get_ccstr();
154 if (cp != NULL) {
155 // Need to turn embedded '\n's back into separate arguments
156 // Not so efficient to print one character at a time,
157 // but the choice is to do the transformation to a buffer
158 // and print that. And this need not be efficient.
159 for (; *cp != '\0'; cp += 1) {
160 switch (*cp) {
161 default:
162 st->print("%c", *cp);
163 break;
164 case '\n':
165 st->print(" -XX:%s=", name);
166 break;
167 }
168 }
169 }
170 } else {
171 ShouldNotReachHere();
172 }
173 }
175 // 4991491 do not "optimize out" the was_set false values: omitting them
176 // tickles a Microsoft compiler bug causing flagTable to be malformed
178 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product}", DEFAULT },
179 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{pd product}", DEFAULT },
180 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{diagnostic}", DEFAULT },
181 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{experimental}", DEFAULT },
182 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{manageable}", DEFAULT },
183 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product rw}", DEFAULT },
185 #ifdef PRODUCT
186 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
187 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
188 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
189 #else
190 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "", DEFAULT },
191 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{pd}", DEFAULT },
192 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{notproduct}", DEFAULT },
193 #endif
195 #ifdef _LP64
196 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{lp64_product}", DEFAULT },
197 #else
198 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
199 #endif // _LP64
201 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 product}", DEFAULT },
202 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 pd product}", DEFAULT },
203 #ifdef PRODUCT
204 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
205 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
206 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
207 #else
208 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1}", DEFAULT },
209 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C1 pd}", DEFAULT },
210 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1 notproduct}", DEFAULT },
211 #endif
214 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 product}", DEFAULT },
215 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 pd product}", DEFAULT },
216 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 diagnostic}", DEFAULT },
217 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 experimental}", DEFAULT },
218 #ifdef PRODUCT
219 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
220 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
221 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
222 #else
223 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2}", DEFAULT },
224 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C2 pd}", DEFAULT },
225 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2 notproduct}", DEFAULT },
226 #endif
228 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark product}", DEFAULT },
229 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark pd product}", DEFAULT },
230 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark diagnostic}", DEFAULT },
231 #ifdef PRODUCT
232 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
233 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
234 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
235 #else
236 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark}", DEFAULT },
237 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{Shark pd}", DEFAULT },
238 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark notproduct}", DEFAULT },
239 #endif
241 static Flag flagTable[] = {
242 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)
243 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)
244 #ifndef SERIALGC
245 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)
246 #endif // SERIALGC
247 #ifdef COMPILER1
248 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
249 #endif
250 #ifdef COMPILER2
251 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)
252 #endif
253 #ifdef SHARK
254 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)
255 #endif
256 FLAGTABLE_EXT
257 {0, NULL, NULL}
258 };
260 Flag* Flag::flags = flagTable;
261 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
263 inline bool str_equal(const char* s, char* q, size_t len) {
264 // s is null terminated, q is not!
265 if (strlen(s) != (unsigned int) len) return false;
266 return strncmp(s, q, len) == 0;
267 }
269 // Search the flag table for a named flag
270 Flag* Flag::find_flag(char* name, size_t length, bool allow_locked) {
271 for (Flag* current = &flagTable[0]; current->name != NULL; current++) {
272 if (str_equal(current->name, name, length)) {
273 // Found a matching entry. Report locked flags only if allowed.
274 if (!(current->is_unlocked() || current->is_unlocker())) {
275 if (!allow_locked) {
276 // disable use of locked flags, e.g. diagnostic, experimental,
277 // commercial... until they are explicitly unlocked
278 return NULL;
279 }
280 }
281 return current;
282 }
283 }
284 // Flag name is not in the flag table
285 return NULL;
286 }
288 // Returns the address of the index'th element
289 static Flag* address_of_flag(CommandLineFlagWithType flag) {
290 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
291 return &Flag::flags[flag];
292 }
294 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
295 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
296 Flag* f = &Flag::flags[flag];
297 return (f->origin == DEFAULT);
298 }
300 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
301 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
302 Flag* f = &Flag::flags[flag];
303 return (f->origin == ERGONOMIC);
304 }
306 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
307 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
308 Flag* f = &Flag::flags[flag];
309 return (f->origin == COMMAND_LINE);
310 }
312 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
313 Flag* result = Flag::find_flag((char*)name, strlen(name));
314 if (result == NULL) return false;
315 *value = (result->origin == COMMAND_LINE);
316 return true;
317 }
319 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
320 Flag* result = Flag::find_flag(name, len);
321 if (result == NULL) return false;
322 if (!result->is_bool()) return false;
323 *value = result->get_bool();
324 return true;
325 }
327 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
328 Flag* result = Flag::find_flag(name, len);
329 if (result == NULL) return false;
330 if (!result->is_bool()) return false;
331 bool old_value = result->get_bool();
332 result->set_bool(*value);
333 *value = old_value;
334 result->origin = origin;
335 return true;
336 }
338 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
339 Flag* faddr = address_of_flag(flag);
340 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
341 faddr->set_bool(value);
342 faddr->origin = origin;
343 }
345 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
346 Flag* result = Flag::find_flag(name, len);
347 if (result == NULL) return false;
348 if (!result->is_intx()) return false;
349 *value = result->get_intx();
350 return true;
351 }
353 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
354 Flag* result = Flag::find_flag(name, len);
355 if (result == NULL) return false;
356 if (!result->is_intx()) return false;
357 intx old_value = result->get_intx();
358 result->set_intx(*value);
359 *value = old_value;
360 result->origin = origin;
361 return true;
362 }
364 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
365 Flag* faddr = address_of_flag(flag);
366 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
367 faddr->set_intx(value);
368 faddr->origin = origin;
369 }
371 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
372 Flag* result = Flag::find_flag(name, len);
373 if (result == NULL) return false;
374 if (!result->is_uintx()) return false;
375 *value = result->get_uintx();
376 return true;
377 }
379 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
380 Flag* result = Flag::find_flag(name, len);
381 if (result == NULL) return false;
382 if (!result->is_uintx()) return false;
383 uintx old_value = result->get_uintx();
384 result->set_uintx(*value);
385 *value = old_value;
386 result->origin = origin;
387 return true;
388 }
390 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
391 Flag* faddr = address_of_flag(flag);
392 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
393 faddr->set_uintx(value);
394 faddr->origin = origin;
395 }
397 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
398 Flag* result = Flag::find_flag(name, len);
399 if (result == NULL) return false;
400 if (!result->is_uint64_t()) return false;
401 *value = result->get_uint64_t();
402 return true;
403 }
405 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
406 Flag* result = Flag::find_flag(name, len);
407 if (result == NULL) return false;
408 if (!result->is_uint64_t()) return false;
409 uint64_t old_value = result->get_uint64_t();
410 result->set_uint64_t(*value);
411 *value = old_value;
412 result->origin = origin;
413 return true;
414 }
416 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
417 Flag* faddr = address_of_flag(flag);
418 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
419 faddr->set_uint64_t(value);
420 faddr->origin = origin;
421 }
423 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
424 Flag* result = Flag::find_flag(name, len);
425 if (result == NULL) return false;
426 if (!result->is_double()) return false;
427 *value = result->get_double();
428 return true;
429 }
431 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
432 Flag* result = Flag::find_flag(name, len);
433 if (result == NULL) return false;
434 if (!result->is_double()) return false;
435 double old_value = result->get_double();
436 result->set_double(*value);
437 *value = old_value;
438 result->origin = origin;
439 return true;
440 }
442 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
443 Flag* faddr = address_of_flag(flag);
444 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
445 faddr->set_double(value);
446 faddr->origin = origin;
447 }
449 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
450 Flag* result = Flag::find_flag(name, len);
451 if (result == NULL) return false;
452 if (!result->is_ccstr()) return false;
453 *value = result->get_ccstr();
454 return true;
455 }
457 // Contract: Flag will make private copy of the incoming value.
458 // Outgoing value is always malloc-ed, and caller MUST call free.
459 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
460 Flag* result = Flag::find_flag(name, len);
461 if (result == NULL) return false;
462 if (!result->is_ccstr()) return false;
463 ccstr old_value = result->get_ccstr();
464 char* new_value = NULL;
465 if (*value != NULL) {
466 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
467 strcpy(new_value, *value);
468 }
469 result->set_ccstr(new_value);
470 if (result->origin == DEFAULT && old_value != NULL) {
471 // Prior value is NOT heap allocated, but was a literal constant.
472 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
473 strcpy(old_value_to_free, old_value);
474 old_value = old_value_to_free;
475 }
476 *value = old_value;
477 result->origin = origin;
478 return true;
479 }
481 // Contract: Flag will make private copy of the incoming value.
482 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
483 Flag* faddr = address_of_flag(flag);
484 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
485 ccstr old_value = faddr->get_ccstr();
486 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
487 strcpy(new_value, value);
488 faddr->set_ccstr(new_value);
489 if (faddr->origin != DEFAULT && old_value != NULL) {
490 // Prior value is heap allocated so free it.
491 FREE_C_HEAP_ARRAY(char, old_value);
492 }
493 faddr->origin = origin;
494 }
496 extern "C" {
497 static int compare_flags(const void* void_a, const void* void_b) {
498 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
499 }
500 }
502 void CommandLineFlags::printSetFlags(outputStream* out) {
503 // Print which flags were set on the command line
504 // note: this method is called before the thread structure is in place
505 // which means resource allocation cannot be used.
507 // Compute size
508 int length= 0;
509 while (flagTable[length].name != NULL) length++;
511 // Sort
512 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
513 for (int index = 0; index < length; index++) {
514 array[index] = &flagTable[index];
515 }
516 qsort(array, length, sizeof(Flag*), compare_flags);
518 // Print
519 for (int i = 0; i < length; i++) {
520 if (array[i]->origin /* naked field! */) {
521 array[i]->print_as_flag(out);
522 out->print(" ");
523 }
524 }
525 out->cr();
526 FREE_C_HEAP_ARRAY(Flag*, array);
527 }
529 #ifndef PRODUCT
532 void CommandLineFlags::verify() {
533 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
534 }
536 #endif // PRODUCT
538 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
539 // Print the flags sorted by name
540 // note: this method is called before the thread structure is in place
541 // which means resource allocation cannot be used.
543 // Compute size
544 int length= 0;
545 while (flagTable[length].name != NULL) length++;
547 // Sort
548 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
549 for (int index = 0; index < length; index++) {
550 array[index] = &flagTable[index];
551 }
552 qsort(array, length, sizeof(Flag*), compare_flags);
554 // Print
555 out->print_cr("[Global flags]");
556 for (int i = 0; i < length; i++) {
557 if (array[i]->is_unlocked()) {
558 array[i]->print_on(out, withComments);
559 }
560 }
561 FREE_C_HEAP_ARRAY(Flag*, array);
562 }
