Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/runtime/globals.cpp@93b6525e3b82
src/share/vm/runtime/globals.cpp
Tue, 08 Apr 2008 12:23:15 -0400
- author
- sgoldman
- date
- Tue, 08 Apr 2008 12:23:15 -0400
- changeset 542
- 93b6525e3b82
- parent 538
- 38a50dd839cf
- child 548
- ba764ed4b6f2
- permissions
- -rw-r--r--
6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
Summary: Rewrite frame::safe_for_sender and friends to be safe for collector/analyzer
Reviewed-by: dcubed, kvn
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 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_globals.cpp.incl"
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)
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)
38 bool Flag::is_unlocker() const {
39 return strcmp(name, "UnlockDiagnosticVMOptions") == 0;
40 }
42 bool Flag::is_unlocked() const {
43 if (strcmp(kind, "{diagnostic}") == 0) {
44 return UnlockDiagnosticVMOptions;
45 } else {
46 return true;
47 }
48 }
50 bool Flag::is_writeable() const {
51 return (strcmp(kind, "{manageable}") == 0 || strcmp(kind, "{product rw}") == 0);
52 }
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 }
61 // Length of format string (e.g. "%.1234s") for printing ccstr below
62 #define FORMAT_BUFFER_LEN 16
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 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);
84 }
85 }
86 st->print(" %s", kind);
87 st->cr();
88 }
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);
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 }
114 }
115 }
116 } else {
117 ShouldNotReachHere();
118 }
119 }
121 // 4991491 do not "optimize out" the was_set false values: omitting them
122 // tickles a Microsoft compiler bug causing flagTable to be malformed
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 },
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
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
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
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 };
179 Flag* Flag::flags = flagTable;
180 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
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 }
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 }
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 }
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 }
213 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
214 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
215 Flag* f = &Flag::flags[flag];
216 return (f->origin == ERGONOMIC);
217 }
219 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
220 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
221 Flag* f = &Flag::flags[flag];
222 return (f->origin == COMMAND_LINE);
223 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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.
391 // Compute size
392 int length= 0;
393 while (flagTable[length].name != NULL) length++;
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);
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 }
413 #ifndef PRODUCT
416 void CommandLineFlags::verify() {
417 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
418 }
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.
425 // Compute size
426 int length= 0;
427 while (flagTable[length].name != NULL) length++;
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);
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 }
446 #endif
