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comparison src/share/vm/runtime/globals.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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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
208 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
209 Flag* result = Flag::find_flag((char*)name, strlen(name));
210 if (result == NULL) return false;
211 *value = (result->origin == COMMAND_LINE);
212 return true;
213 }
214
215 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
216 Flag* result = Flag::find_flag(name, len);
217 if (result == NULL) return false;
218 if (!result->is_bool()) return false;
219 *value = result->get_bool();
220 return true;
221 }
222
223 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
224 Flag* result = Flag::find_flag(name, len);
225 if (result == NULL) return false;
226 if (!result->is_bool()) return false;
227 bool old_value = result->get_bool();
228 result->set_bool(*value);
229 *value = old_value;
230 result->origin = origin;
231 return true;
232 }
233
234 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
235 Flag* faddr = address_of_flag(flag);
236 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
237 faddr->set_bool(value);
238 faddr->origin = origin;
239 }
240
241 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
242 Flag* result = Flag::find_flag(name, len);
243 if (result == NULL) return false;
244 if (!result->is_intx()) return false;
245 *value = result->get_intx();
246 return true;
247 }
248
249 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
250 Flag* result = Flag::find_flag(name, len);
251 if (result == NULL) return false;
252 if (!result->is_intx()) return false;
253 intx old_value = result->get_intx();
254 result->set_intx(*value);
255 *value = old_value;
256 result->origin = origin;
257 return true;
258 }
259
260 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
261 Flag* faddr = address_of_flag(flag);
262 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
263 faddr->set_intx(value);
264 faddr->origin = origin;
265 }
266
267 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
268 Flag* result = Flag::find_flag(name, len);
269 if (result == NULL) return false;
270 if (!result->is_uintx()) return false;
271 *value = result->get_uintx();
272 return true;
273 }
274
275 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
276 Flag* result = Flag::find_flag(name, len);
277 if (result == NULL) return false;
278 if (!result->is_uintx()) return false;
279 uintx old_value = result->get_uintx();
280 result->set_uintx(*value);
281 *value = old_value;
282 result->origin = origin;
283 return true;
284 }
285
286 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
287 Flag* faddr = address_of_flag(flag);
288 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
289 faddr->set_uintx(value);
290 faddr->origin = origin;
291 }
292
293 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
294 Flag* result = Flag::find_flag(name, len);
295 if (result == NULL) return false;
296 if (!result->is_double()) return false;
297 *value = result->get_double();
298 return true;
299 }
300
301 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
302 Flag* result = Flag::find_flag(name, len);
303 if (result == NULL) return false;
304 if (!result->is_double()) return false;
305 double old_value = result->get_double();
306 result->set_double(*value);
307 *value = old_value;
308 result->origin = origin;
309 return true;
310 }
311
312 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
313 Flag* faddr = address_of_flag(flag);
314 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
315 faddr->set_double(value);
316 faddr->origin = origin;
317 }
318
319 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
320 Flag* result = Flag::find_flag(name, len);
321 if (result == NULL) return false;
322 if (!result->is_ccstr()) return false;
323 *value = result->get_ccstr();
324 return true;
325 }
326
327 // Contract: Flag will make private copy of the incoming value.
328 // Outgoing value is always malloc-ed, and caller MUST call free.
329 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
330 Flag* result = Flag::find_flag(name, len);
331 if (result == NULL) return false;
332 if (!result->is_ccstr()) return false;
333 ccstr old_value = result->get_ccstr();
334 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
335 strcpy(new_value, *value);
336 result->set_ccstr(new_value);
337 if (result->origin == DEFAULT && old_value != NULL) {
338 // Prior value is NOT heap allocated, but was a literal constant.
339 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
340 strcpy(old_value_to_free, old_value);
341 old_value = old_value_to_free;
342 }
343 *value = old_value;
344 result->origin = origin;
345 return true;
346 }
347
348 // Contract: Flag will make private copy of the incoming value.
349 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
350 Flag* faddr = address_of_flag(flag);
351 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
352 ccstr old_value = faddr->get_ccstr();
353 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
354 strcpy(new_value, value);
355 faddr->set_ccstr(new_value);
356 if (faddr->origin != DEFAULT && old_value != NULL) {
357 // Prior value is heap allocated so free it.
358 FREE_C_HEAP_ARRAY(char, old_value);
359 }
360 faddr->origin = origin;
361 }
362
363 extern "C" {
364 static int compare_flags(const void* void_a, const void* void_b) {
365 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
366 }
367 }
368
369 void CommandLineFlags::printSetFlags() {
370 // Print which flags were set on the command line
371 // note: this method is called before the thread structure is in place
372 // which means resource allocation cannot be used.
373
374 // Compute size
375 int length= 0;
376 while (flagTable[length].name != NULL) length++;
377
378 // Sort
379 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
380 for (int index = 0; index < length; index++) {
381 array[index] = &flagTable[index];
382 }
383 qsort(array, length, sizeof(Flag*), compare_flags);
384
385 // Print
386 for (int i = 0; i < length; i++) {
387 if (array[i]->origin /* naked field! */) {
388 array[i]->print_as_flag(tty);
389 tty->print(" ");
390 }
391 }
392 tty->cr();
393 FREE_C_HEAP_ARRAY(Flag*, array);
394 }
395
396 #ifndef PRODUCT
397
398
399 void CommandLineFlags::verify() {
400 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
401 }
402
403 void CommandLineFlags::printFlags() {
404 // Print the flags sorted by name
405 // note: this method is called before the thread structure is in place
406 // which means resource allocation cannot be used.
407
408 // Compute size
409 int length= 0;
410 while (flagTable[length].name != NULL) length++;
411
412 // Sort
413 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
414 for (int index = 0; index < length; index++) {
415 array[index] = &flagTable[index];
416 }
417 qsort(array, length, sizeof(Flag*), compare_flags);
418
419 // Print
420 tty->print_cr("[Global flags]");
421 for (int i = 0; i < length; i++) {
422 if (array[i]->is_unlocked()) {
423 array[i]->print_on(tty);
424 }
425 }
426 FREE_C_HEAP_ARRAY(Flag*, array);
427 }
428
429 #endif