Mercurial > hg > truffle
annotate src/share/vm/runtime/globals.cpp @ 98:deb97b8ef02b
6679708: No_Safepoint_Verifier and BacktraceBuilder have uninitialized fields
Summary: fix or remove uninitialized fields
Reviewed-by: kvn, rasbold
author | never |
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date | Wed, 26 Mar 2008 12:25:06 -0700 |
parents | 183f41cf8bfe |
children | 38a50dd839cf |
rev | line source |
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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(); | |
71 const char* eol; | |
72 while ((eol = strchr(cp, '\n')) != NULL) { | |
73 char format_buffer[FORMAT_BUFFER_LEN]; | |
74 size_t llen = pointer_delta(eol, cp, sizeof(char)); | |
75 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN, | |
76 "%%." SIZE_FORMAT "s", llen); | |
77 st->print(format_buffer, cp); | |
78 st->cr(); | |
79 cp = eol+1; | |
80 st->print("%5s %-35s += ", "", name); | |
81 } | |
82 st->print("%-16s", cp); | |
83 } | |
84 st->print(" %s", kind); | |
85 st->cr(); | |
86 } | |
87 | |
88 void Flag::print_as_flag(outputStream* st) { | |
89 if (is_bool()) { | |
90 st->print("-XX:%s%s", get_bool() ? "+" : "-", name); | |
91 } else if (is_intx()) { | |
92 st->print("-XX:%s=" INTX_FORMAT, name, get_intx()); | |
93 } else if (is_uintx()) { | |
94 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx()); | |
95 } else if (is_ccstr()) { | |
96 st->print("-XX:%s=", name); | |
97 // Need to turn embedded '\n's back into separate arguments | |
98 // Not so efficient to print one character at a time, | |
99 // but the choice is to do the transformation to a buffer | |
100 // and print that. And this need not be efficient. | |
101 for (const char* cp = get_ccstr(); *cp != '\0'; cp += 1) { | |
102 switch (*cp) { | |
103 default: | |
104 st->print("%c", *cp); | |
105 break; | |
106 case '\n': | |
107 st->print(" -XX:%s=", name); | |
108 break; | |
109 } | |
110 } | |
111 } else { | |
112 ShouldNotReachHere(); | |
113 } | |
114 } | |
115 | |
116 // 4991491 do not "optimize out" the was_set false values: omitting them | |
117 // tickles a Microsoft compiler bug causing flagTable to be malformed | |
118 | |
119 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product}", DEFAULT }, | |
120 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd product}", DEFAULT }, | |
121 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{diagnostic}", DEFAULT }, | |
122 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{manageable}", DEFAULT }, | |
123 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product rw}", DEFAULT }, | |
124 | |
125 #ifdef PRODUCT | |
126 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ | |
127 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */ | |
128 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) | |
129 #else | |
130 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "", DEFAULT }, | |
131 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd}", DEFAULT }, | |
132 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{notproduct}", DEFAULT }, | |
133 #endif | |
134 | |
135 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 product}", DEFAULT }, | |
136 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd product}", DEFAULT }, | |
137 #ifdef PRODUCT | |
138 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ | |
139 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */ | |
140 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) | |
141 #else | |
142 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1}", DEFAULT }, | |
143 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd}", DEFAULT }, | |
144 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 notproduct}", DEFAULT }, | |
145 #endif | |
146 | |
147 | |
148 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 product}", DEFAULT }, | |
149 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd product}", DEFAULT }, | |
150 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 diagnostic}", DEFAULT }, | |
151 #ifdef PRODUCT | |
152 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */ | |
153 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */ | |
154 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) | |
155 #else | |
156 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2}", DEFAULT }, | |
157 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd}", DEFAULT }, | |
158 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 notproduct}", DEFAULT }, | |
159 #endif | |
160 | |
161 | |
162 static Flag flagTable[] = { | |
163 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) | |
164 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) | |
165 #ifdef COMPILER1 | |
166 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT) | |
167 #endif | |
168 #ifdef COMPILER2 | |
169 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) | |
170 #endif | |
171 {0, NULL, NULL} | |
172 }; | |
173 | |
174 Flag* Flag::flags = flagTable; | |
175 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag)); | |
176 | |
177 inline bool str_equal(const char* s, char* q, size_t len) { | |
178 // s is null terminated, q is not! | |
179 if (strlen(s) != (unsigned int) len) return false; | |
180 return strncmp(s, q, len) == 0; | |
181 } | |
182 | |
183 Flag* Flag::find_flag(char* name, size_t length) { | |
184 for (Flag* current = &flagTable[0]; current->name; current++) { | |
185 if (str_equal(current->name, name, length)) { | |
186 if (!(current->is_unlocked() || current->is_unlocker())) { | |
187 // disable use of diagnostic flags until they are unlocked | |
188 return NULL; | |
189 } | |
190 return current; | |
191 } | |
192 } | |
193 return NULL; | |
194 } | |
195 | |
196 // Returns the address of the index'th element | |
197 static Flag* address_of_flag(CommandLineFlagWithType flag) { | |
198 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); | |
199 return &Flag::flags[flag]; | |
200 } | |
201 | |
202 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) { | |
203 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); | |
204 Flag* f = &Flag::flags[flag]; | |
205 return (f->origin == DEFAULT); | |
206 } | |
207 | |
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208 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) { |
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209 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); |
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210 Flag* f = &Flag::flags[flag]; |
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211 return (f->origin == ERGONOMIC); |
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212 } |
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213 |
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214 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) { |
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215 assert((size_t)flag < Flag::numFlags, "bad command line flag index"); |
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216 Flag* f = &Flag::flags[flag]; |
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217 return (f->origin == COMMAND_LINE); |
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218 } |
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219 |
0 | 220 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) { |
221 Flag* result = Flag::find_flag((char*)name, strlen(name)); | |
222 if (result == NULL) return false; | |
223 *value = (result->origin == COMMAND_LINE); | |
224 return true; | |
225 } | |
226 | |
227 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) { | |
228 Flag* result = Flag::find_flag(name, len); | |
229 if (result == NULL) return false; | |
230 if (!result->is_bool()) return false; | |
231 *value = result->get_bool(); | |
232 return true; | |
233 } | |
234 | |
235 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) { | |
236 Flag* result = Flag::find_flag(name, len); | |
237 if (result == NULL) return false; | |
238 if (!result->is_bool()) return false; | |
239 bool old_value = result->get_bool(); | |
240 result->set_bool(*value); | |
241 *value = old_value; | |
242 result->origin = origin; | |
243 return true; | |
244 } | |
245 | |
246 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) { | |
247 Flag* faddr = address_of_flag(flag); | |
248 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type"); | |
249 faddr->set_bool(value); | |
250 faddr->origin = origin; | |
251 } | |
252 | |
253 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) { | |
254 Flag* result = Flag::find_flag(name, len); | |
255 if (result == NULL) return false; | |
256 if (!result->is_intx()) return false; | |
257 *value = result->get_intx(); | |
258 return true; | |
259 } | |
260 | |
261 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) { | |
262 Flag* result = Flag::find_flag(name, len); | |
263 if (result == NULL) return false; | |
264 if (!result->is_intx()) return false; | |
265 intx old_value = result->get_intx(); | |
266 result->set_intx(*value); | |
267 *value = old_value; | |
268 result->origin = origin; | |
269 return true; | |
270 } | |
271 | |
272 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) { | |
273 Flag* faddr = address_of_flag(flag); | |
274 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type"); | |
275 faddr->set_intx(value); | |
276 faddr->origin = origin; | |
277 } | |
278 | |
279 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) { | |
280 Flag* result = Flag::find_flag(name, len); | |
281 if (result == NULL) return false; | |
282 if (!result->is_uintx()) return false; | |
283 *value = result->get_uintx(); | |
284 return true; | |
285 } | |
286 | |
287 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) { | |
288 Flag* result = Flag::find_flag(name, len); | |
289 if (result == NULL) return false; | |
290 if (!result->is_uintx()) return false; | |
291 uintx old_value = result->get_uintx(); | |
292 result->set_uintx(*value); | |
293 *value = old_value; | |
294 result->origin = origin; | |
295 return true; | |
296 } | |
297 | |
298 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) { | |
299 Flag* faddr = address_of_flag(flag); | |
300 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type"); | |
301 faddr->set_uintx(value); | |
302 faddr->origin = origin; | |
303 } | |
304 | |
305 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) { | |
306 Flag* result = Flag::find_flag(name, len); | |
307 if (result == NULL) return false; | |
308 if (!result->is_double()) return false; | |
309 *value = result->get_double(); | |
310 return true; | |
311 } | |
312 | |
313 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) { | |
314 Flag* result = Flag::find_flag(name, len); | |
315 if (result == NULL) return false; | |
316 if (!result->is_double()) return false; | |
317 double old_value = result->get_double(); | |
318 result->set_double(*value); | |
319 *value = old_value; | |
320 result->origin = origin; | |
321 return true; | |
322 } | |
323 | |
324 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) { | |
325 Flag* faddr = address_of_flag(flag); | |
326 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type"); | |
327 faddr->set_double(value); | |
328 faddr->origin = origin; | |
329 } | |
330 | |
331 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) { | |
332 Flag* result = Flag::find_flag(name, len); | |
333 if (result == NULL) return false; | |
334 if (!result->is_ccstr()) return false; | |
335 *value = result->get_ccstr(); | |
336 return true; | |
337 } | |
338 | |
339 // Contract: Flag will make private copy of the incoming value. | |
340 // Outgoing value is always malloc-ed, and caller MUST call free. | |
341 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) { | |
342 Flag* result = Flag::find_flag(name, len); | |
343 if (result == NULL) return false; | |
344 if (!result->is_ccstr()) return false; | |
345 ccstr old_value = result->get_ccstr(); | |
346 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1); | |
347 strcpy(new_value, *value); | |
348 result->set_ccstr(new_value); | |
349 if (result->origin == DEFAULT && old_value != NULL) { | |
350 // Prior value is NOT heap allocated, but was a literal constant. | |
351 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1); | |
352 strcpy(old_value_to_free, old_value); | |
353 old_value = old_value_to_free; | |
354 } | |
355 *value = old_value; | |
356 result->origin = origin; | |
357 return true; | |
358 } | |
359 | |
360 // Contract: Flag will make private copy of the incoming value. | |
361 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) { | |
362 Flag* faddr = address_of_flag(flag); | |
363 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type"); | |
364 ccstr old_value = faddr->get_ccstr(); | |
365 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1); | |
366 strcpy(new_value, value); | |
367 faddr->set_ccstr(new_value); | |
368 if (faddr->origin != DEFAULT && old_value != NULL) { | |
369 // Prior value is heap allocated so free it. | |
370 FREE_C_HEAP_ARRAY(char, old_value); | |
371 } | |
372 faddr->origin = origin; | |
373 } | |
374 | |
375 extern "C" { | |
376 static int compare_flags(const void* void_a, const void* void_b) { | |
377 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name); | |
378 } | |
379 } | |
380 | |
381 void CommandLineFlags::printSetFlags() { | |
382 // Print which flags were set on the command line | |
383 // note: this method is called before the thread structure is in place | |
384 // which means resource allocation cannot be used. | |
385 | |
386 // Compute size | |
387 int length= 0; | |
388 while (flagTable[length].name != NULL) length++; | |
389 | |
390 // Sort | |
391 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length); | |
392 for (int index = 0; index < length; index++) { | |
393 array[index] = &flagTable[index]; | |
394 } | |
395 qsort(array, length, sizeof(Flag*), compare_flags); | |
396 | |
397 // Print | |
398 for (int i = 0; i < length; i++) { | |
399 if (array[i]->origin /* naked field! */) { | |
400 array[i]->print_as_flag(tty); | |
401 tty->print(" "); | |
402 } | |
403 } | |
404 tty->cr(); | |
405 FREE_C_HEAP_ARRAY(Flag*, array); | |
406 } | |
407 | |
408 #ifndef PRODUCT | |
409 | |
410 | |
411 void CommandLineFlags::verify() { | |
412 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict"); | |
413 } | |
414 | |
415 void CommandLineFlags::printFlags() { | |
416 // Print the flags sorted by name | |
417 // note: this method is called before the thread structure is in place | |
418 // which means resource allocation cannot be used. | |
419 | |
420 // Compute size | |
421 int length= 0; | |
422 while (flagTable[length].name != NULL) length++; | |
423 | |
424 // Sort | |
425 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length); | |
426 for (int index = 0; index < length; index++) { | |
427 array[index] = &flagTable[index]; | |
428 } | |
429 qsort(array, length, sizeof(Flag*), compare_flags); | |
430 | |
431 // Print | |
432 tty->print_cr("[Global flags]"); | |
433 for (int i = 0; i < length; i++) { | |
434 if (array[i]->is_unlocked()) { | |
435 array[i]->print_on(tty); | |
436 } | |
437 } | |
438 FREE_C_HEAP_ARRAY(Flag*, array); | |
439 } | |
440 | |
441 #endif |