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 */
24
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
45
46
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)
53
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)
57
58 MATERIALIZE_FLAGS_EXT
59
60
61 bool Flag::is_unlocker() const {
62 return strcmp(name, "UnlockDiagnosticVMOptions") == 0 ||
63 strcmp(name, "UnlockExperimentalVMOptions") == 0 ||
64 is_unlocker_ext();
65 }
66
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 }
83
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 }
89
90 bool Flag::is_writeable() const {
91 return strcmp(kind, "{manageable}") == 0 ||
92 strcmp(kind, "{product rw}") == 0 ||
93 is_writeable_ext();
94 }
95
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 }
102
103
104 // Length of format string (e.g. "%.1234s") for printing ccstr below
105 #define FORMAT_BUFFER_LEN 16
106
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());
114
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 }
141
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_double()) {
152 st->print("-XX:%s=%f", name, get_double());
153 } else if (is_ccstr()) {
154 st->print("-XX:%s=", name);
155 const char* cp = get_ccstr();
156 if (cp != NULL) {
157 // Need to turn embedded '\n's back into separate arguments
158 // Not so efficient to print one character at a time,
159 // but the choice is to do the transformation to a buffer
160 // and print that. And this need not be efficient.
161 for (; *cp != '\0'; cp += 1) {
162 switch (*cp) {
163 default:
164 st->print("%c", *cp);
165 break;
166 case '\n':
167 st->print(" -XX:%s=", name);
168 break;
169 }
170 }
171 }
172 } else {
173 ShouldNotReachHere();
174 }
175 }
176
177 // 4991491 do not "optimize out" the was_set false values: omitting them
178 // tickles a Microsoft compiler bug causing flagTable to be malformed
179
180 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product}", DEFAULT },
181 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{pd product}", DEFAULT },
182 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{diagnostic}", DEFAULT },
183 #define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{experimental}", DEFAULT },
184 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{manageable}", DEFAULT },
185 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{product rw}", DEFAULT },
186
187 #ifdef PRODUCT
188 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
189 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
190 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
191 #else
192 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "", DEFAULT },
193 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{pd}", DEFAULT },
194 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{notproduct}", DEFAULT },
195 #endif
196
197 #ifdef _LP64
198 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{lp64_product}", DEFAULT },
199 #else
200 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
201 #endif // _LP64
202
203 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 product}", DEFAULT },
204 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C1 pd product}", DEFAULT },
205 #ifdef PRODUCT
206 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
207 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
208 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
209 #else
210 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1}", DEFAULT },
211 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C1 pd}", DEFAULT },
212 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C1 notproduct}", DEFAULT },
213 #endif
214
215
216 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 product}", DEFAULT },
217 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 pd product}", DEFAULT },
218 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 diagnostic}", DEFAULT },
219 #define C2_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{C2 experimental}", DEFAULT },
220 #ifdef PRODUCT
221 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
222 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
223 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
224 #else
225 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2}", DEFAULT },
226 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{C2 pd}", DEFAULT },
227 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{C2 notproduct}", DEFAULT },
228 #endif
229
230 #define SHARK_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark product}", DEFAULT },
231 #define SHARK_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark pd product}", DEFAULT },
232 #define SHARK_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) "{Shark diagnostic}", DEFAULT },
233 #ifdef PRODUCT
234 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
235 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
236 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
237 #else
238 #define SHARK_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark}", DEFAULT },
239 #define SHARK_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, doc, "{Shark pd}", DEFAULT },
240 #define SHARK_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, doc, "{Shark notproduct}", DEFAULT },
241 #endif
242
243 static Flag flagTable[] = {
244 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)
245 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)
246 #ifndef SERIALGC
247 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)
248 #endif // SERIALGC
249 #ifdef COMPILER1
250 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
251 #endif
252 #ifdef COMPILER2
253 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)
254 #endif
255 #ifdef SHARK
256 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)
257 #endif
258 FLAGTABLE_EXT
259 {0, NULL, NULL}
260 };
261
262 Flag* Flag::flags = flagTable;
263 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
264
265 inline bool str_equal(const char* s, char* q, size_t len) {
266 // s is null terminated, q is not!
267 if (strlen(s) != (unsigned int) len) return false;
268 return strncmp(s, q, len) == 0;
269 }
270
271 // Search the flag table for a named flag
272 Flag* Flag::find_flag(char* name, size_t length, bool allow_locked) {
273 for (Flag* current = &flagTable[0]; current->name != NULL; current++) {
274 if (str_equal(current->name, name, length)) {
275 // Found a matching entry. Report locked flags only if allowed.
276 if (!(current->is_unlocked() || current->is_unlocker())) {
277 if (!allow_locked) {
278 // disable use of locked flags, e.g. diagnostic, experimental,
279 // commercial... until they are explicitly unlocked
280 return NULL;
281 }
282 }
283 return current;
284 }
285 }
286 // Flag name is not in the flag table
287 return NULL;
288 }
289
290 // Returns the address of the index'th element
291 static Flag* address_of_flag(CommandLineFlagWithType flag) {
292 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
293 return &Flag::flags[flag];
294 }
295
296 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
297 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
298 Flag* f = &Flag::flags[flag];
299 return (f->origin == DEFAULT);
300 }
301
302 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
303 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
304 Flag* f = &Flag::flags[flag];
305 return (f->origin == ERGONOMIC);
306 }
307
308 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
309 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
310 Flag* f = &Flag::flags[flag];
311 return (f->origin == COMMAND_LINE);
312 }
313
314 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
315 Flag* result = Flag::find_flag((char*)name, strlen(name));
316 if (result == NULL) return false;
317 *value = (result->origin == COMMAND_LINE);
318 return true;
319 }
320
321 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
322 Flag* result = Flag::find_flag(name, len);
323 if (result == NULL) return false;
324 if (!result->is_bool()) return false;
325 *value = result->get_bool();
326 return true;
327 }
328
329 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
330 Flag* result = Flag::find_flag(name, len);
331 if (result == NULL) return false;
332 if (!result->is_bool()) return false;
333 bool old_value = result->get_bool();
334 result->set_bool(*value);
335 *value = old_value;
336 result->origin = origin;
337 return true;
338 }
339
340 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
341 Flag* faddr = address_of_flag(flag);
342 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
343 faddr->set_bool(value);
344 faddr->origin = origin;
345 }
346
347 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
348 Flag* result = Flag::find_flag(name, len);
349 if (result == NULL) return false;
350 if (!result->is_intx()) return false;
351 *value = result->get_intx();
352 return true;
353 }
354
355 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
356 Flag* result = Flag::find_flag(name, len);
357 if (result == NULL) return false;
358 if (!result->is_intx()) return false;
359 intx old_value = result->get_intx();
360 result->set_intx(*value);
361 *value = old_value;
362 result->origin = origin;
363 return true;
364 }
365
366 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
367 Flag* faddr = address_of_flag(flag);
368 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
369 faddr->set_intx(value);
370 faddr->origin = origin;
371 }
372
373 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
374 Flag* result = Flag::find_flag(name, len);
375 if (result == NULL) return false;
376 if (!result->is_uintx()) return false;
377 *value = result->get_uintx();
378 return true;
379 }
380
381 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
382 Flag* result = Flag::find_flag(name, len);
383 if (result == NULL) return false;
384 if (!result->is_uintx()) return false;
385 uintx old_value = result->get_uintx();
386 result->set_uintx(*value);
387 *value = old_value;
388 result->origin = origin;
389 return true;
390 }
391
392 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
393 Flag* faddr = address_of_flag(flag);
394 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
395 faddr->set_uintx(value);
396 faddr->origin = origin;
397 }
398
399 bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
400 Flag* result = Flag::find_flag(name, len);
401 if (result == NULL) return false;
402 if (!result->is_uint64_t()) return false;
403 *value = result->get_uint64_t();
404 return true;
405 }
406
407 bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin) {
408 Flag* result = Flag::find_flag(name, len);
409 if (result == NULL) return false;
410 if (!result->is_uint64_t()) return false;
411 uint64_t old_value = result->get_uint64_t();
412 result->set_uint64_t(*value);
413 *value = old_value;
414 result->origin = origin;
415 return true;
416 }
417
418 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, FlagValueOrigin origin) {
419 Flag* faddr = address_of_flag(flag);
420 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
421 faddr->set_uint64_t(value);
422 faddr->origin = origin;
423 }
424
425 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
426 Flag* result = Flag::find_flag(name, len);
427 if (result == NULL) return false;
428 if (!result->is_double()) return false;
429 *value = result->get_double();
430 return true;
431 }
432
433 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
434 Flag* result = Flag::find_flag(name, len);
435 if (result == NULL) return false;
436 if (!result->is_double()) return false;
437 double old_value = result->get_double();
438 result->set_double(*value);
439 *value = old_value;
440 result->origin = origin;
441 return true;
442 }
443
444 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
445 Flag* faddr = address_of_flag(flag);
446 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
447 faddr->set_double(value);
448 faddr->origin = origin;
449 }
450
451 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
452 Flag* result = Flag::find_flag(name, len);
453 if (result == NULL) return false;
454 if (!result->is_ccstr()) return false;
455 *value = result->get_ccstr();
456 return true;
457 }
458
459 // Contract: Flag will make private copy of the incoming value.
460 // Outgoing value is always malloc-ed, and caller MUST call free.
461 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
462 Flag* result = Flag::find_flag(name, len);
463 if (result == NULL) return false;
464 if (!result->is_ccstr()) return false;
465 ccstr old_value = result->get_ccstr();
466 char* new_value = NULL;
467 if (*value != NULL) {
468 new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
469 strcpy(new_value, *value);
470 }
471 result->set_ccstr(new_value);
472 if (result->origin == DEFAULT && old_value != NULL) {
473 // Prior value is NOT heap allocated, but was a literal constant.
474 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
475 strcpy(old_value_to_free, old_value);
476 old_value = old_value_to_free;
477 }
478 *value = old_value;
479 result->origin = origin;
480 return true;
481 }
482
483 // Contract: Flag will make private copy of the incoming value.
484 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
485 Flag* faddr = address_of_flag(flag);
486 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
487 ccstr old_value = faddr->get_ccstr();
488 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
489 strcpy(new_value, value);
490 faddr->set_ccstr(new_value);
491 if (faddr->origin != DEFAULT && old_value != NULL) {
492 // Prior value is heap allocated so free it.
493 FREE_C_HEAP_ARRAY(char, old_value);
494 }
495 faddr->origin = origin;
496 }
497
498 extern "C" {
499 static int compare_flags(const void* void_a, const void* void_b) {
500 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
501 }
502 }
503
504 void CommandLineFlags::printSetFlags(outputStream* out) {
505 // Print which flags were set on the command line
506 // note: this method is called before the thread structure is in place
507 // which means resource allocation cannot be used.
508
509 // Compute size
510 int length= 0;
511 while (flagTable[length].name != NULL) length++;
512
513 // Sort
514 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
515 for (int index = 0; index < length; index++) {
516 array[index] = &flagTable[index];
517 }
518 qsort(array, length, sizeof(Flag*), compare_flags);
519
520 // Print
521 for (int i = 0; i < length; i++) {
522 if (array[i]->origin /* naked field! */) {
523 array[i]->print_as_flag(out);
524 out->print(" ");
525 }
526 }
527 out->cr();
528 FREE_C_HEAP_ARRAY(Flag*, array);
529 }
530
531 #ifndef PRODUCT
532
533
534 void CommandLineFlags::verify() {
535 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
536 }
537
538 #endif // PRODUCT
539
540 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
541 // Print the flags sorted by name
542 // note: this method is called before the thread structure is in place
543 // which means resource allocation cannot be used.
544
545 // Compute size
546 int length= 0;
547 while (flagTable[length].name != NULL) length++;
548
549 // Sort
550 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
551 for (int index = 0; index < length; index++) {
552 array[index] = &flagTable[index];
553 }
554 qsort(array, length, sizeof(Flag*), compare_flags);
555
556 // Print
557 out->print_cr("[Global flags]");
558 for (int i = 0; i < length; i++) {
559 if (array[i]->is_unlocked()) {
560 array[i]->print_on(out, withComments);
561 }
562 }
563 FREE_C_HEAP_ARRAY(Flag*, array);
564 }