Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/globals.cpp@cd00eaeebef6
src/share/vm/runtime/globals.cpp
Mon, 05 Dec 2011 12:50:00 -0500
- author
- phh
- date
- Mon, 05 Dec 2011 12:50:00 -0500
- changeset 3303
- cd00eaeebef6
- parent 3287
- 358eca91be48
- child 3342
- 6c995c08526c
- permissions
- -rw-r--r--
7117389: Add a framework for vendor-specific command line switch extensions to Hotspot
Summary: Add a file, globals_ext.hpp, containing a null interface, to be replaced by a vendor in altsrc as needed.
Reviewed-by: coleenp, kamg, dholmes, johnc, jrose
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 || strcmp(kind, "{product rw}") == 0);
86 }
88 // All flags except "manageable" are assumed internal flags.
89 // Long term, we need to define a mechanism to specify which flags
90 // are external/stable and change this function accordingly.
91 bool Flag::is_external() const {
92 return (strcmp(kind, "{manageable}") == 0);
93 }
95 // Length of format string (e.g. "%.1234s") for printing ccstr below
96 #define FORMAT_BUFFER_LEN 16
98 void Flag::print_on(outputStream* st, bool withComments) {
99 st->print("%9s %-40s %c= ", type, name, (origin != DEFAULT ? ':' : ' '));
100 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false");
101 if (is_intx()) st->print("%-16ld", get_intx());
102 if (is_uintx()) st->print("%-16lu", get_uintx());
103 if (is_uint64_t()) st->print("%-16lu", get_uint64_t());
104 if (is_double()) st->print("%-16f", get_double());
106 if (is_ccstr()) {
107 const char* cp = get_ccstr();
108 if (cp != NULL) {
109 const char* eol;
110 while ((eol = strchr(cp, '\n')) != NULL) {
111 char format_buffer[FORMAT_BUFFER_LEN];
112 size_t llen = pointer_delta(eol, cp, sizeof(char));
113 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
114 "%%." SIZE_FORMAT "s", llen);
115 st->print(format_buffer, cp);
116 st->cr();
117 cp = eol+1;
118 st->print("%5s %-35s += ", "", name);
119 }
120 st->print("%-16s", cp);
121 }
122 else st->print("%-16s", "");
123 }
124 st->print("%-20s", kind);
125 if (withComments) {
126 #ifndef PRODUCT
127 st->print("%s", doc );
128 #endif
129 }
130 st->cr();
131 }
133 void Flag::print_as_flag(outputStream* st) {
134 if (is_bool()) {
135 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
136 } else if (is_intx()) {
137 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
138 } else if (is_uintx()) {
139 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
140 } else if (is_uint64_t()) {
141 st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
142 } else if (is_ccstr()) {
143 st->print("-XX:%s=", name);
144 const char* cp = get_ccstr();
145 if (cp != NULL) {
146 // Need to turn embedded '\n's back into separate arguments
147 // Not so efficient to print one character at a time,
148 // but the choice is to do the transformation to a buffer
149 // and print that. And this need not be efficient.
150 for (; *cp != '\0'; cp += 1) {
151 switch (*cp) {
152 default:
153 st->print("%c", *cp);
154 break;
155 case '\n':
156 st->print(" -XX:%s=", name);
157 break;
158 }
159 }
160 }
161 } else {
162 ShouldNotReachHere();
163 }
164 }
166 // 4991491 do not "optimize out" the was_set false values: omitting them
167 // tickles a Microsoft compiler bug causing flagTable to be malformed
169 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product}", DEFAULT },
170 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{pd product}", DEFAULT },
171 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{diagnostic}", DEFAULT },
172 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{experimental}", DEFAULT },
173 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{manageable}", DEFAULT },
174 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product rw}", DEFAULT },
176 #ifdef PRODUCT
177 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
178 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
179 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
180 #else
181 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "", DEFAULT },
182 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{pd}", DEFAULT },
183 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{notproduct}", DEFAULT },
184 #endif
186 #ifdef _LP64
187 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{lp64_product}", DEFAULT },
188 #else
189 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
190 #endif // _LP64
192 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 product}", DEFAULT },
193 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 pd product}", DEFAULT },
194 #ifdef PRODUCT
195 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
196 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
197 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
198 #else
199 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1}", DEFAULT },
200 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C1 pd}", DEFAULT },
201 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1 notproduct}", DEFAULT },
202 #endif
205 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 product}", DEFAULT },
206 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 pd product}", DEFAULT },
207 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 diagnostic}", DEFAULT },
208 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 experimental}", DEFAULT },
209 #ifdef PRODUCT
210 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
211 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
212 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
213 #else
214 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2}", DEFAULT },
215 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C2 pd}", DEFAULT },
216 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2 notproduct}", DEFAULT },
217 #endif
219 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark product}", DEFAULT },
220 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark pd product}", DEFAULT },
221 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark diagnostic}", DEFAULT },
222 #ifdef PRODUCT
223 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
224 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
225 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
226 #else
227 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark}", DEFAULT },
228 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{Shark pd}", DEFAULT },
229 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark notproduct}", DEFAULT },
230 #endif
232 static Flag flagTable[] = {
233 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)
234 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)
235 #ifndef SERIALGC
236 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)
237 #endif // SERIALGC
238 #ifdef COMPILER1
239 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
240 #endif
241 #ifdef COMPILER2
242 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)
243 #endif
244 #ifdef SHARK
245 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)
246 #endif
247 FLAGTABLE_EXT
248 {0, NULL, NULL}
249 };
251 Flag* Flag::flags = flagTable;
252 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
254 inline bool str_equal(const char* s, char* q, size_t len) {
255 // s is null terminated, q is not!
256 if (strlen(s) != (unsigned int) len) return false;
257 return strncmp(s, q, len) == 0;
258 }
260 Flag* Flag::find_flag(char* name, size_t length) {
261 for (Flag* current = &flagTable[0]; current->name; current++) {
262 if (str_equal(current->name, name, length)) {
263 if (!(current->is_unlocked() || current->is_unlocker())) {
264 // disable use of diagnostic or experimental flags until they
265 // are explicitly unlocked
266 return NULL;
267 }
268 return current;
269 }
270 }
271 return NULL;
272 }
274 // Returns the address of the index'th element
275 static Flag* address_of_flag(CommandLineFlagWithType flag) {
276 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
277 return &Flag::flags[flag];
278 }
280 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
281 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
282 Flag* f = &Flag::flags[flag];
283 return (f->origin == DEFAULT);
284 }
286 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
287 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
288 Flag* f = &Flag::flags[flag];
289 return (f->origin == ERGONOMIC);
290 }
292 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
293 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
294 Flag* f = &Flag::flags[flag];
295 return (f->origin == COMMAND_LINE);
296 }
298 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
299 Flag* result = Flag::find_flag((char*)name, strlen(name));
300 if (result == NULL) return false;
301 *value = (result->origin == COMMAND_LINE);
302 return true;
303 }
305 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
306 Flag* result = Flag::find_flag(name, len);
307 if (result == NULL) return false;
308 if (!result->is_bool()) return false;
309 *value = result->get_bool();
310 return true;
311 }
313 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
314 Flag* result = Flag::find_flag(name, len);
315 if (result == NULL) return false;
316 if (!result->is_bool()) return false;
317 bool old_value = result->get_bool();
318 result->set_bool(*value);
319 *value = old_value;
320 result->origin = origin;
321 return true;
322 }
324 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
325 Flag* faddr = address_of_flag(flag);
326 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
327 faddr->set_bool(value);
328 faddr->origin = origin;
329 }
331 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
332 Flag* result = Flag::find_flag(name, len);
333 if (result == NULL) return false;
334 if (!result->is_intx()) return false;
335 *value = result->get_intx();
336 return true;
337 }
339 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
340 Flag* result = Flag::find_flag(name, len);
341 if (result == NULL) return false;
342 if (!result->is_intx()) return false;
343 intx old_value = result->get_intx();
344 result->set_intx(*value);
345 *value = old_value;
346 result->origin = origin;
347 return true;
348 }
350 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
351 Flag* faddr = address_of_flag(flag);
352 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
353 faddr->set_intx(value);
354 faddr->origin = origin;
355 }
357 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
358 Flag* result = Flag::find_flag(name, len);
359 if (result == NULL) return false;
360 if (!result->is_uintx()) return false;
361 *value = result->get_uintx();
362 return true;
363 }
365 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
366 Flag* result = Flag::find_flag(name, len);
367 if (result == NULL) return false;
368 if (!result->is_uintx()) return false;
369 uintx old_value = result->get_uintx();
370 result->set_uintx(*value);
371 *value = old_value;
372 result->origin = origin;
373 return true;
374 }
376 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
377 Flag* faddr = address_of_flag(flag);
378 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
379 faddr->set_uintx(value);
380 faddr->origin = origin;
381 }
383 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
384 Flag* result = Flag::find_flag(name, len);
385 if (result == NULL) return false;
386 if (!result->is_uint64_t()) return false;
387 *value = result->get_uint64_t();
388 return true;
389 }
391 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
392 Flag* result = Flag::find_flag(name, len);
393 if (result == NULL) return false;
394 if (!result->is_uint64_t()) return false;
395 uint64_t old_value = result->get_uint64_t();
396 result->set_uint64_t(*value);
397 *value = old_value;
398 result->origin = origin;
399 return true;
400 }
402 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
403 Flag* faddr = address_of_flag(flag);
404 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
405 faddr->set_uint64_t(value);
406 faddr->origin = origin;
407 }
409 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
410 Flag* result = Flag::find_flag(name, len);
411 if (result == NULL) return false;
412 if (!result->is_double()) return false;
413 *value = result->get_double();
414 return true;
415 }
417 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
418 Flag* result = Flag::find_flag(name, len);
419 if (result == NULL) return false;
420 if (!result->is_double()) return false;
421 double old_value = result->get_double();
422 result->set_double(*value);
423 *value = old_value;
424 result->origin = origin;
425 return true;
426 }
428 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
429 Flag* faddr = address_of_flag(flag);
430 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
431 faddr->set_double(value);
432 faddr->origin = origin;
433 }
435 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
436 Flag* result = Flag::find_flag(name, len);
437 if (result == NULL) return false;
438 if (!result->is_ccstr()) return false;
439 *value = result->get_ccstr();
440 return true;
441 }
443 // Contract: Flag will make private copy of the incoming value.
444 // Outgoing value is always malloc-ed, and caller MUST call free.
445 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
446 Flag* result = Flag::find_flag(name, len);
447 if (result == NULL) return false;
448 if (!result->is_ccstr()) return false;
449 ccstr old_value = result->get_ccstr();
450 char* new_value = NULL;
451 if (*value != NULL) {
452 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
453 strcpy(new_value, *value);
454 }
455 result->set_ccstr(new_value);
456 if (result->origin == DEFAULT && old_value != NULL) {
457 // Prior value is NOT heap allocated, but was a literal constant.
458 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
459 strcpy(old_value_to_free, old_value);
460 old_value = old_value_to_free;
461 }
462 *value = old_value;
463 result->origin = origin;
464 return true;
465 }
467 // Contract: Flag will make private copy of the incoming value.
468 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
469 Flag* faddr = address_of_flag(flag);
470 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
471 ccstr old_value = faddr->get_ccstr();
472 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
473 strcpy(new_value, value);
474 faddr->set_ccstr(new_value);
475 if (faddr->origin != DEFAULT && old_value != NULL) {
476 // Prior value is heap allocated so free it.
477 FREE_C_HEAP_ARRAY(char, old_value);
478 }
479 faddr->origin = origin;
480 }
482 extern "C" {
483 static int compare_flags(const void* void_a, const void* void_b) {
484 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
485 }
486 }
488 void CommandLineFlags::printSetFlags() {
489 // Print which flags were set on the command line
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 for (int i = 0; i < length; i++) {
506 if (array[i]->origin /* naked field! */) {
507 array[i]->print_as_flag(tty);
508 tty->print(" ");
509 }
510 }
511 tty->cr();
512 FREE_C_HEAP_ARRAY(Flag*, array);
513 }
515 #ifndef PRODUCT
518 void CommandLineFlags::verify() {
519 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
520 }
522 #endif // PRODUCT
524 void CommandLineFlags::printFlags(bool withComments) {
525 // Print the flags sorted by name
526 // note: this method is called before the thread structure is in place
527 // which means resource allocation cannot be used.
529 // Compute size
530 int length= 0;
531 while (flagTable[length].name != NULL) length++;
533 // Sort
534 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
535 for (int index = 0; index < length; index++) {
536 array[index] = &flagTable[index];
537 }
538 qsort(array, length, sizeof(Flag*), compare_flags);
540 // Print
541 tty->print_cr("[Global flags]");
542 for (int i = 0; i < length; i++) {
543 if (array[i]->is_unlocked()) {
544 array[i]->print_on(tty, withComments);
545 }
546 }
547 FREE_C_HEAP_ARRAY(Flag*, array);
548 }
