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src/share/vm/runtime/globals.cpp@4f25538b54c9
src/share/vm/runtime/globals.cpp
Mon, 09 Jan 2012 10:27:24 +0100
- author
- fparain
- date
- Mon, 09 Jan 2012 10:27:24 +0100
- changeset 3402
- 4f25538b54c9
- parent 3342
- 6c995c08526c
- child 3650
- 80fe40862b02
- permissions
- -rw-r--r--
7120511: Add diagnostic commands
Reviewed-by: acorn, phh, dcubed, sspitsyn
1 /*
2 * Copyright (c) 1997, 2011, 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 bool Flag::is_writeable() const {
85 return strcmp(kind, "{manageable}") == 0 ||
86 strcmp(kind, "{product rw}") == 0 ||
87 is_writeable_ext();
88 }
90 // All flags except "manageable" are assumed to be internal flags.
91 // Long term, we need to define a mechanism to specify which flags
92 // are external/stable and change this function accordingly.
93 bool Flag::is_external() const {
94 return strcmp(kind, "{manageable}") == 0 || is_external_ext();
95 }
98 // Length of format string (e.g. "%.1234s") for printing ccstr below
99 #define FORMAT_BUFFER_LEN 16
101 void Flag::print_on(outputStream* st, bool withComments) {
102 st->print("%9s %-40s %c= ", type, name, (origin != DEFAULT ? ':' : ' '));
103 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false");
104 if (is_intx()) st->print("%-16ld", get_intx());
105 if (is_uintx()) st->print("%-16lu", get_uintx());
106 if (is_uint64_t()) st->print("%-16lu", get_uint64_t());
107 if (is_double()) st->print("%-16f", get_double());
109 if (is_ccstr()) {
110 const char* cp = get_ccstr();
111 if (cp != NULL) {
112 const char* eol;
113 while ((eol = strchr(cp, '\n')) != NULL) {
114 char format_buffer[FORMAT_BUFFER_LEN];
115 size_t llen = pointer_delta(eol, cp, sizeof(char));
116 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
117 "%%." SIZE_FORMAT "s", llen);
118 st->print(format_buffer, cp);
119 st->cr();
120 cp = eol+1;
121 st->print("%5s %-35s += ", "", name);
122 }
123 st->print("%-16s", cp);
124 }
125 else st->print("%-16s", "");
126 }
127 st->print("%-20s", kind);
128 if (withComments) {
129 #ifndef PRODUCT
130 st->print("%s", doc );
131 #endif
132 }
133 st->cr();
134 }
136 void Flag::print_as_flag(outputStream* st) {
137 if (is_bool()) {
138 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
139 } else if (is_intx()) {
140 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
141 } else if (is_uintx()) {
142 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
143 } else if (is_uint64_t()) {
144 st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
145 } else if (is_ccstr()) {
146 st->print("-XX:%s=", name);
147 const char* cp = get_ccstr();
148 if (cp != NULL) {
149 // Need to turn embedded '\n's back into separate arguments
150 // Not so efficient to print one character at a time,
151 // but the choice is to do the transformation to a buffer
152 // and print that. And this need not be efficient.
153 for (; *cp != '\0'; cp += 1) {
154 switch (*cp) {
155 default:
156 st->print("%c", *cp);
157 break;
158 case '\n':
159 st->print(" -XX:%s=", name);
160 break;
161 }
162 }
163 }
164 } else {
165 ShouldNotReachHere();
166 }
167 }
169 // 4991491 do not "optimize out" the was_set false values: omitting them
170 // tickles a Microsoft compiler bug causing flagTable to be malformed
172 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product}", DEFAULT },
173 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{pd product}", DEFAULT },
174 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{diagnostic}", DEFAULT },
175 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{experimental}", DEFAULT },
176 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{manageable}", DEFAULT },
177 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product rw}", DEFAULT },
179 #ifdef PRODUCT
180 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
181 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
182 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
183 #else
184 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "", DEFAULT },
185 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{pd}", DEFAULT },
186 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{notproduct}", DEFAULT },
187 #endif
189 #ifdef _LP64
190 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{lp64_product}", DEFAULT },
191 #else
192 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
193 #endif // _LP64
195 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 product}", DEFAULT },
196 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 pd product}", DEFAULT },
197 #ifdef PRODUCT
198 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
199 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
200 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
201 #else
202 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1}", DEFAULT },
203 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C1 pd}", DEFAULT },
204 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1 notproduct}", DEFAULT },
205 #endif
208 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 product}", DEFAULT },
209 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 pd product}", DEFAULT },
210 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 diagnostic}", DEFAULT },
211 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 experimental}", DEFAULT },
212 #ifdef PRODUCT
213 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
214 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
215 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
216 #else
217 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2}", DEFAULT },
218 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C2 pd}", DEFAULT },
219 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2 notproduct}", DEFAULT },
220 #endif
222 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark product}", DEFAULT },
223 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark pd product}", DEFAULT },
224 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark diagnostic}", DEFAULT },
225 #ifdef PRODUCT
226 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
227 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
228 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
229 #else
230 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark}", DEFAULT },
231 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{Shark pd}", DEFAULT },
232 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark notproduct}", DEFAULT },
233 #endif
235 static Flag flagTable[] = {
236 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)
237 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)
238 #ifndef SERIALGC
239 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)
240 #endif // SERIALGC
241 #ifdef COMPILER1
242 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
243 #endif
244 #ifdef COMPILER2
245 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)
246 #endif
247 #ifdef SHARK
248 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)
249 #endif
250 FLAGTABLE_EXT
251 {0, NULL, NULL}
252 };
254 Flag* Flag::flags = flagTable;
255 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
257 inline bool str_equal(const char* s, char* q, size_t len) {
258 // s is null terminated, q is not!
259 if (strlen(s) != (unsigned int) len) return false;
260 return strncmp(s, q, len) == 0;
261 }
263 Flag* Flag::find_flag(char* name, size_t length) {
264 for (Flag* current = &flagTable[0]; current->name; current++) {
265 if (str_equal(current->name, name, length)) {
266 if (!(current->is_unlocked() || current->is_unlocker())) {
267 // disable use of diagnostic or experimental flags until they
268 // are explicitly unlocked
269 return NULL;
270 }
271 return current;
272 }
273 }
274 return NULL;
275 }
277 // Returns the address of the index'th element
278 static Flag* address_of_flag(CommandLineFlagWithType flag) {
279 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
280 return &Flag::flags[flag];
281 }
283 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
284 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
285 Flag* f = &Flag::flags[flag];
286 return (f->origin == DEFAULT);
287 }
289 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
290 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
291 Flag* f = &Flag::flags[flag];
292 return (f->origin == ERGONOMIC);
293 }
295 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
296 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
297 Flag* f = &Flag::flags[flag];
298 return (f->origin == COMMAND_LINE);
299 }
301 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
302 Flag* result = Flag::find_flag((char*)name, strlen(name));
303 if (result == NULL) return false;
304 *value = (result->origin == COMMAND_LINE);
305 return true;
306 }
308 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
309 Flag* result = Flag::find_flag(name, len);
310 if (result == NULL) return false;
311 if (!result->is_bool()) return false;
312 *value = result->get_bool();
313 return true;
314 }
316 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
317 Flag* result = Flag::find_flag(name, len);
318 if (result == NULL) return false;
319 if (!result->is_bool()) return false;
320 bool old_value = result->get_bool();
321 result->set_bool(*value);
322 *value = old_value;
323 result->origin = origin;
324 return true;
325 }
327 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
328 Flag* faddr = address_of_flag(flag);
329 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
330 faddr->set_bool(value);
331 faddr->origin = origin;
332 }
334 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
335 Flag* result = Flag::find_flag(name, len);
336 if (result == NULL) return false;
337 if (!result->is_intx()) return false;
338 *value = result->get_intx();
339 return true;
340 }
342 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
343 Flag* result = Flag::find_flag(name, len);
344 if (result == NULL) return false;
345 if (!result->is_intx()) return false;
346 intx old_value = result->get_intx();
347 result->set_intx(*value);
348 *value = old_value;
349 result->origin = origin;
350 return true;
351 }
353 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
354 Flag* faddr = address_of_flag(flag);
355 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
356 faddr->set_intx(value);
357 faddr->origin = origin;
358 }
360 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
361 Flag* result = Flag::find_flag(name, len);
362 if (result == NULL) return false;
363 if (!result->is_uintx()) return false;
364 *value = result->get_uintx();
365 return true;
366 }
368 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
369 Flag* result = Flag::find_flag(name, len);
370 if (result == NULL) return false;
371 if (!result->is_uintx()) return false;
372 uintx old_value = result->get_uintx();
373 result->set_uintx(*value);
374 *value = old_value;
375 result->origin = origin;
376 return true;
377 }
379 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
380 Flag* faddr = address_of_flag(flag);
381 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
382 faddr->set_uintx(value);
383 faddr->origin = origin;
384 }
386 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
387 Flag* result = Flag::find_flag(name, len);
388 if (result == NULL) return false;
389 if (!result->is_uint64_t()) return false;
390 *value = result->get_uint64_t();
391 return true;
392 }
394 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
395 Flag* result = Flag::find_flag(name, len);
396 if (result == NULL) return false;
397 if (!result->is_uint64_t()) return false;
398 uint64_t old_value = result->get_uint64_t();
399 result->set_uint64_t(*value);
400 *value = old_value;
401 result->origin = origin;
402 return true;
403 }
405 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
406 Flag* faddr = address_of_flag(flag);
407 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
408 faddr->set_uint64_t(value);
409 faddr->origin = origin;
410 }
412 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
413 Flag* result = Flag::find_flag(name, len);
414 if (result == NULL) return false;
415 if (!result->is_double()) return false;
416 *value = result->get_double();
417 return true;
418 }
420 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
421 Flag* result = Flag::find_flag(name, len);
422 if (result == NULL) return false;
423 if (!result->is_double()) return false;
424 double old_value = result->get_double();
425 result->set_double(*value);
426 *value = old_value;
427 result->origin = origin;
428 return true;
429 }
431 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
432 Flag* faddr = address_of_flag(flag);
433 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
434 faddr->set_double(value);
435 faddr->origin = origin;
436 }
438 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
439 Flag* result = Flag::find_flag(name, len);
440 if (result == NULL) return false;
441 if (!result->is_ccstr()) return false;
442 *value = result->get_ccstr();
443 return true;
444 }
446 // Contract: Flag will make private copy of the incoming value.
447 // Outgoing value is always malloc-ed, and caller MUST call free.
448 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
449 Flag* result = Flag::find_flag(name, len);
450 if (result == NULL) return false;
451 if (!result->is_ccstr()) return false;
452 ccstr old_value = result->get_ccstr();
453 char* new_value = NULL;
454 if (*value != NULL) {
455 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
456 strcpy(new_value, *value);
457 }
458 result->set_ccstr(new_value);
459 if (result->origin == DEFAULT && old_value != NULL) {
460 // Prior value is NOT heap allocated, but was a literal constant.
461 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
462 strcpy(old_value_to_free, old_value);
463 old_value = old_value_to_free;
464 }
465 *value = old_value;
466 result->origin = origin;
467 return true;
468 }
470 // Contract: Flag will make private copy of the incoming value.
471 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
472 Flag* faddr = address_of_flag(flag);
473 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
474 ccstr old_value = faddr->get_ccstr();
475 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
476 strcpy(new_value, value);
477 faddr->set_ccstr(new_value);
478 if (faddr->origin != DEFAULT && old_value != NULL) {
479 // Prior value is heap allocated so free it.
480 FREE_C_HEAP_ARRAY(char, old_value);
481 }
482 faddr->origin = origin;
483 }
485 extern "C" {
486 static int compare_flags(const void* void_a, const void* void_b) {
487 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
488 }
489 }
491 void CommandLineFlags::printSetFlags(outputStream* out) {
492 // Print which flags were set on the command line
493 // note: this method is called before the thread structure is in place
494 // which means resource allocation cannot be used.
496 // Compute size
497 int length= 0;
498 while (flagTable[length].name != NULL) length++;
500 // Sort
501 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
502 for (int index = 0; index < length; index++) {
503 array[index] = &flagTable[index];
504 }
505 qsort(array, length, sizeof(Flag*), compare_flags);
507 // Print
508 for (int i = 0; i < length; i++) {
509 if (array[i]->origin /* naked field! */) {
510 array[i]->print_as_flag(out);
511 out->print(" ");
512 }
513 }
514 out->cr();
515 FREE_C_HEAP_ARRAY(Flag*, array);
516 }
518 #ifndef PRODUCT
521 void CommandLineFlags::verify() {
522 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
523 }
525 #endif // PRODUCT
527 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
528 // Print the flags sorted by name
529 // note: this method is called before the thread structure is in place
530 // which means resource allocation cannot be used.
532 // Compute size
533 int length= 0;
534 while (flagTable[length].name != NULL) length++;
536 // Sort
537 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
538 for (int index = 0; index < length; index++) {
539 array[index] = &flagTable[index];
540 }
541 qsort(array, length, sizeof(Flag*), compare_flags);
543 // Print
544 out->print_cr("[Global flags]");
545 for (int i = 0; i < length; i++) {
546 if (array[i]->is_unlocked()) {
547 array[i]->print_on(out, withComments);
548 }
549 }
550 FREE_C_HEAP_ARRAY(Flag*, array);
551 }
