Mercurial > hg > truffle
annotate src/share/vm/runtime/globals.cpp @ 103:38a50dd839cf
6619271: The -Xprintflags causes the VM to segv
Summary: add null checks
Reviewed-by: jrose, kvn
author | never |
---|---|
date | Thu, 03 Apr 2008 10:20:44 -0700 |
parents | 183f41cf8bfe |
children | ba764ed4b6f2 |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_globals.cpp.incl" | |
27 | |
28 | |
29 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \ | |
30 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \ | |
31 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG, \ | |
32 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG) | |
33 | |
34 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \ | |
35 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \ | |
36 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG) | |
37 | |
38 bool Flag::is_unlocker() const { | |
39 return strcmp(name, "UnlockDiagnosticVMOptions") == 0; | |
40 } | |
41 | |
42 bool Flag::is_unlocked() const { | |
43 if (strcmp(kind, "{diagnostic}") == 0) { | |
44 return UnlockDiagnosticVMOptions; | |
45 } else { | |
46 return true; | |
47 } | |
48 } | |
49 | |
50 bool Flag::is_writeable() const { | |
51 return (strcmp(kind, "{manageable}") == 0 || strcmp(kind, "{product rw}") == 0); | |
52 } | |
53 | |
54 // All flags except "manageable" are assumed internal flags. | |
55 // Long term, we need to define a mechanism to specify which flags | |
56 // are external/stable and change this function accordingly. | |
57 bool Flag::is_external() const { | |
58 return (strcmp(kind, "{manageable}") == 0); | |
59 } | |
60 | |
61 // Length of format string (e.g. "%.1234s") for printing ccstr below | |
62 #define FORMAT_BUFFER_LEN 16 | |
63 | |
64 void Flag::print_on(outputStream* st) { | |
65 st->print("%5s %-35s %c= ", type, name, (origin != DEFAULT ? ':' : ' ')); | |
66 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false"); | |
67 if (is_intx()) st->print("%-16ld", get_intx()); | |
68 if (is_uintx()) st->print("%-16lu", get_uintx()); | |
69 if (is_ccstr()) { | |
70 const char* cp = get_ccstr(); | |
103 | 71 if (cp != NULL) { |
72 const char* eol; | |
73 while ((eol = strchr(cp, '\n')) != NULL) { | |
74 char format_buffer[FORMAT_BUFFER_LEN]; | |
75 size_t llen = pointer_delta(eol, cp, sizeof(char)); | |
76 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN, | |
77 "%%." SIZE_FORMAT "s", llen); | |
78 st->print(format_buffer, cp); | |
79 st->cr(); | |
80 cp = eol+1; | |
81 st->print("%5s %-35s += ", "", name); | |
82 } | |
83 st->print("%-16s", cp); | |
0 | 84 } |
85 } | |
86 st->print(" %s", kind); | |
87 st->cr(); | |
88 } | |
89 | |
90 void Flag::print_as_flag(outputStream* st) { | |
91 if (is_bool()) { | |
92 st->print("-XX:%s%s", get_bool() ? "+" : "-", name); | |
93 } else if (is_intx()) { | |
94 st->print("-XX:%s=" INTX_FORMAT, name, get_intx()); | |
95 } else if (is_uintx()) { | |
96 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx()); | |
97 } else if (is_ccstr()) { | |
98 st->print("-XX:%s=", name); | |
103 | 99 const char* cp = get_ccstr(); |
100 if (cp != NULL) { | |
101 // Need to turn embedded '\n's back into separate arguments | |
102 // Not so efficient to print one character at a time, | |
103 // but the choice is to do the transformation to a buffer | |
104 // and print that. And this need not be efficient. | |
105 for (; *cp != '\0'; cp += 1) { | |
106 switch (*cp) { | |
107 default: | |
108 st->print("%c", *cp); | |
109 break; | |
110 case '\n': | |
111 st->print(" -XX:%s=", name); | |
112 break; | |
113 } | |
0 | 114 } |
115 } | |
116 } else { | |
117 ShouldNotReachHere(); | |
118 } | |
119 } | |
120 | |
121 // 4991491 do not "optimize out" the was_set false values: omitting them | |
122 // tickles a Microsoft compiler bug causing flagTable to be malformed | |
123 | |
124 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product}", DEFAULT }, | |
125 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd product}", DEFAULT }, | |
126 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{diagnostic}", DEFAULT }, | |
127 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{manageable}", DEFAULT }, | |
128 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product rw}", DEFAULT }, | |
129 | |
130 #ifdef PRODUCT | |
131 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ | |
132 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */ | |
133 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) | |
134 #else | |
135 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "", DEFAULT }, | |
136 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd}", DEFAULT }, | |
137 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{notproduct}", DEFAULT }, | |
138 #endif | |
139 | |
140 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 product}", DEFAULT }, | |
141 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd product}", DEFAULT }, | |
142 #ifdef PRODUCT | |
143 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ | |
144 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */ | |
145 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) | |
146 #else | |
147 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1}", DEFAULT }, | |
148 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd}", DEFAULT }, | |
149 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 notproduct}", DEFAULT }, | |
150 #endif | |
151 | |
152 | |
153 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 product}", DEFAULT }, | |
154 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd product}", DEFAULT }, | |
155 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 diagnostic}", DEFAULT }, | |
156 #ifdef PRODUCT | |
157 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ | |
158 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */ | |
159 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) | |
160 #else | |
161 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2}", DEFAULT }, | |
162 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd}", DEFAULT }, | |
163 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 notproduct}", DEFAULT }, | |
164 #endif | |
165 | |
166 | |
167 static Flag flagTable[] = { | |
168 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_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT) | |
169 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) | |
170 #ifdef COMPILER1 | |
171 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT) | |
172 #endif | |
173 #ifdef COMPILER2 | |
174 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_NOTPRODUCT_FLAG_STRUCT) | |
175 #endif | |
176 {0, NULL, NULL} | |
177 }; | |
178 | |
179 Flag* Flag::flags = flagTable; | |
180 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag)); | |
181 | |
182 inline bool str_equal(const char* s, char* q, size_t len) { | |
183 // s is null terminated, q is not! | |
184 if (strlen(s) != (unsigned int) len) return false; | |
185 return strncmp(s, q, len) == 0; | |
186 } | |
187 | |
188 Flag* Flag::find_flag(char* name, size_t length) { | |
189 for (Flag* current = &flagTable[0]; current->name; current++) { | |
190 if (str_equal(current->name, name, length)) { | |
191 if (!(current->is_unlocked() || current->is_unlocker())) { | |
192 // disable use of diagnostic flags until they are unlocked | |
193 return NULL; | |
194 } | |
195 return current; | |
196 } | |
197 } | |
198 return NULL; | |
199 } | |
200 | |
201 // Returns the address of the index'th element | |
202 static Flag* address_of_flag(CommandLineFlagWithType flag) { | |
203 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); | |
204 return &Flag::flags[flag]; | |
205 } | |
206 | |
207 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) { | |
208 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); | |
209 Flag* f = &Flag::flags[flag]; | |
210 return (f->origin == DEFAULT); | |
211 } | |
212 | |
13
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213 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) { |
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214 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); |
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215 Flag* f = &Flag::flags[flag]; |
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216 return (f->origin == ERGONOMIC); |
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217 } |
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218 |
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219 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) { |
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220 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); |
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221 Flag* f = &Flag::flags[flag]; |
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222 return (f->origin == COMMAND_LINE); |
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223 } |
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224 |
0 | 225 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) { |
226 Flag* result = Flag::find_flag((char*)name, strlen(name)); | |
227 if (result == NULL) return false; | |
228 *value = (result->origin == COMMAND_LINE); | |
229 return true; | |
230 } | |
231 | |
232 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) { | |
233 Flag* result = Flag::find_flag(name, len); | |
234 if (result == NULL) return false; | |
235 if (!result->is_bool()) return false; | |
236 *value = result->get_bool(); | |
237 return true; | |
238 } | |
239 | |
240 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) { | |
241 Flag* result = Flag::find_flag(name, len); | |
242 if (result == NULL) return false; | |
243 if (!result->is_bool()) return false; | |
244 bool old_value = result->get_bool(); | |
245 result->set_bool(*value); | |
246 *value = old_value; | |
247 result->origin = origin; | |
248 return true; | |
249 } | |
250 | |
251 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) { | |
252 Flag* faddr = address_of_flag(flag); | |
253 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type"); | |
254 faddr->set_bool(value); | |
255 faddr->origin = origin; | |
256 } | |
257 | |
258 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) { | |
259 Flag* result = Flag::find_flag(name, len); | |
260 if (result == NULL) return false; | |
261 if (!result->is_intx()) return false; | |
262 *value = result->get_intx(); | |
263 return true; | |
264 } | |
265 | |
266 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) { | |
267 Flag* result = Flag::find_flag(name, len); | |
268 if (result == NULL) return false; | |
269 if (!result->is_intx()) return false; | |
270 intx old_value = result->get_intx(); | |
271 result->set_intx(*value); | |
272 *value = old_value; | |
273 result->origin = origin; | |
274 return true; | |
275 } | |
276 | |
277 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) { | |
278 Flag* faddr = address_of_flag(flag); | |
279 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type"); | |
280 faddr->set_intx(value); | |
281 faddr->origin = origin; | |
282 } | |
283 | |
284 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) { | |
285 Flag* result = Flag::find_flag(name, len); | |
286 if (result == NULL) return false; | |
287 if (!result->is_uintx()) return false; | |
288 *value = result->get_uintx(); | |
289 return true; | |
290 } | |
291 | |
292 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) { | |
293 Flag* result = Flag::find_flag(name, len); | |
294 if (result == NULL) return false; | |
295 if (!result->is_uintx()) return false; | |
296 uintx old_value = result->get_uintx(); | |
297 result->set_uintx(*value); | |
298 *value = old_value; | |
299 result->origin = origin; | |
300 return true; | |
301 } | |
302 | |
303 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) { | |
304 Flag* faddr = address_of_flag(flag); | |
305 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type"); | |
306 faddr->set_uintx(value); | |
307 faddr->origin = origin; | |
308 } | |
309 | |
310 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) { | |
311 Flag* result = Flag::find_flag(name, len); | |
312 if (result == NULL) return false; | |
313 if (!result->is_double()) return false; | |
314 *value = result->get_double(); | |
315 return true; | |
316 } | |
317 | |
318 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) { | |
319 Flag* result = Flag::find_flag(name, len); | |
320 if (result == NULL) return false; | |
321 if (!result->is_double()) return false; | |
322 double old_value = result->get_double(); | |
323 result->set_double(*value); | |
324 *value = old_value; | |
325 result->origin = origin; | |
326 return true; | |
327 } | |
328 | |
329 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) { | |
330 Flag* faddr = address_of_flag(flag); | |
331 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type"); | |
332 faddr->set_double(value); | |
333 faddr->origin = origin; | |
334 } | |
335 | |
336 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) { | |
337 Flag* result = Flag::find_flag(name, len); | |
338 if (result == NULL) return false; | |
339 if (!result->is_ccstr()) return false; | |
340 *value = result->get_ccstr(); | |
341 return true; | |
342 } | |
343 | |
344 // Contract: Flag will make private copy of the incoming value. | |
345 // Outgoing value is always malloc-ed, and caller MUST call free. | |
346 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) { | |
347 Flag* result = Flag::find_flag(name, len); | |
348 if (result == NULL) return false; | |
349 if (!result->is_ccstr()) return false; | |
350 ccstr old_value = result->get_ccstr(); | |
351 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1); | |
352 strcpy(new_value, *value); | |
353 result->set_ccstr(new_value); | |
354 if (result->origin == DEFAULT && old_value != NULL) { | |
355 // Prior value is NOT heap allocated, but was a literal constant. | |
356 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1); | |
357 strcpy(old_value_to_free, old_value); | |
358 old_value = old_value_to_free; | |
359 } | |
360 *value = old_value; | |
361 result->origin = origin; | |
362 return true; | |
363 } | |
364 | |
365 // Contract: Flag will make private copy of the incoming value. | |
366 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) { | |
367 Flag* faddr = address_of_flag(flag); | |
368 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type"); | |
369 ccstr old_value = faddr->get_ccstr(); | |
370 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1); | |
371 strcpy(new_value, value); | |
372 faddr->set_ccstr(new_value); | |
373 if (faddr->origin != DEFAULT && old_value != NULL) { | |
374 // Prior value is heap allocated so free it. | |
375 FREE_C_HEAP_ARRAY(char, old_value); | |
376 } | |
377 faddr->origin = origin; | |
378 } | |
379 | |
380 extern "C" { | |
381 static int compare_flags(const void* void_a, const void* void_b) { | |
382 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name); | |
383 } | |
384 } | |
385 | |
386 void CommandLineFlags::printSetFlags() { | |
387 // Print which flags were set on the command line | |
388 // note: this method is called before the thread structure is in place | |
389 // which means resource allocation cannot be used. | |
390 | |
391 // Compute size | |
392 int length= 0; | |
393 while (flagTable[length].name != NULL) length++; | |
394 | |
395 // Sort | |
396 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length); | |
397 for (int index = 0; index < length; index++) { | |
398 array[index] = &flagTable[index]; | |
399 } | |
400 qsort(array, length, sizeof(Flag*), compare_flags); | |
401 | |
402 // Print | |
403 for (int i = 0; i < length; i++) { | |
404 if (array[i]->origin /* naked field! */) { | |
405 array[i]->print_as_flag(tty); | |
406 tty->print(" "); | |
407 } | |
408 } | |
409 tty->cr(); | |
410 FREE_C_HEAP_ARRAY(Flag*, array); | |
411 } | |
412 | |
413 #ifndef PRODUCT | |
414 | |
415 | |
416 void CommandLineFlags::verify() { | |
417 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict"); | |
418 } | |
419 | |
420 void CommandLineFlags::printFlags() { | |
421 // Print the flags sorted by name | |
422 // note: this method is called before the thread structure is in place | |
423 // which means resource allocation cannot be used. | |
424 | |
425 // Compute size | |
426 int length= 0; | |
427 while (flagTable[length].name != NULL) length++; | |
428 | |
429 // Sort | |
430 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length); | |
431 for (int index = 0; index < length; index++) { | |
432 array[index] = &flagTable[index]; | |
433 } | |
434 qsort(array, length, sizeof(Flag*), compare_flags); | |
435 | |
436 // Print | |
437 tty->print_cr("[Global flags]"); | |
438 for (int i = 0; i < length; i++) { | |
439 if (array[i]->is_unlocked()) { | |
440 array[i]->print_on(tty); | |
441 } | |
442 } | |
443 FREE_C_HEAP_ARRAY(Flag*, array); | |
444 } | |
445 | |
446 #endif |