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src/share/vm/runtime/globals.cpp@018d5b58dd4f
src/share/vm/runtime/globals.cpp
Thu, 17 Apr 2008 22:18:15 -0400
- author
- kamg
- date
- Thu, 17 Apr 2008 22:18:15 -0400
- changeset 551
- 018d5b58dd4f
- parent 548
- ba764ed4b6f2
- child 631
- d1605aabd0a1
- child 777
- 37f87013dfd8
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- -rw-r--r--
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
Summary: Initial checkin of JSDT code
Reviewed-by: acorn, sbohne
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, \
33 MATERIALIZE_LP64_PRODUCT_FLAG)
35 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
36 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
37 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
39 bool Flag::is_unlocker() const {
40 return strcmp(name, "UnlockDiagnosticVMOptions") == 0;
41 }
43 bool Flag::is_unlocked() const {
44 if (strcmp(kind, "{diagnostic}") == 0) {
45 return UnlockDiagnosticVMOptions;
46 } else {
47 return true;
48 }
49 }
51 bool Flag::is_writeable() const {
52 return (strcmp(kind, "{manageable}") == 0 || strcmp(kind, "{product rw}") == 0);
53 }
55 // All flags except "manageable" are assumed internal flags.
56 // Long term, we need to define a mechanism to specify which flags
57 // are external/stable and change this function accordingly.
58 bool Flag::is_external() const {
59 return (strcmp(kind, "{manageable}") == 0);
60 }
62 // Length of format string (e.g. "%.1234s") for printing ccstr below
63 #define FORMAT_BUFFER_LEN 16
65 void Flag::print_on(outputStream* st) {
66 st->print("%5s %-35s %c= ", type, name, (origin != DEFAULT ? ':' : ' '));
67 if (is_bool()) st->print("%-16s", get_bool() ? "true" : "false");
68 if (is_intx()) st->print("%-16ld", get_intx());
69 if (is_uintx()) st->print("%-16lu", get_uintx());
70 if (is_ccstr()) {
71 const char* cp = get_ccstr();
72 if (cp != NULL) {
73 const char* eol;
74 while ((eol = strchr(cp, '\n')) != NULL) {
75 char format_buffer[FORMAT_BUFFER_LEN];
76 size_t llen = pointer_delta(eol, cp, sizeof(char));
77 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
78 "%%." SIZE_FORMAT "s", llen);
79 st->print(format_buffer, cp);
80 st->cr();
81 cp = eol+1;
82 st->print("%5s %-35s += ", "", name);
83 }
84 st->print("%-16s", cp);
85 }
86 }
87 st->print(" %s", kind);
88 st->cr();
89 }
91 void Flag::print_as_flag(outputStream* st) {
92 if (is_bool()) {
93 st->print("-XX:%s%s", get_bool() ? "+" : "-", name);
94 } else if (is_intx()) {
95 st->print("-XX:%s=" INTX_FORMAT, name, get_intx());
96 } else if (is_uintx()) {
97 st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
98 } else if (is_ccstr()) {
99 st->print("-XX:%s=", name);
100 const char* cp = get_ccstr();
101 if (cp != NULL) {
102 // Need to turn embedded '\n's back into separate arguments
103 // Not so efficient to print one character at a time,
104 // but the choice is to do the transformation to a buffer
105 // and print that. And this need not be efficient.
106 for (; *cp != '\0'; cp += 1) {
107 switch (*cp) {
108 default:
109 st->print("%c", *cp);
110 break;
111 case '\n':
112 st->print(" -XX:%s=", name);
113 break;
114 }
115 }
116 }
117 } else {
118 ShouldNotReachHere();
119 }
120 }
122 // 4991491 do not "optimize out" the was_set false values: omitting them
123 // tickles a Microsoft compiler bug causing flagTable to be malformed
125 #define RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product}", DEFAULT },
126 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd product}", DEFAULT },
127 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{diagnostic}", DEFAULT },
128 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{manageable}", DEFAULT },
129 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product rw}", DEFAULT },
131 #ifdef PRODUCT
132 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
133 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
134 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
135 #else
136 #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "", DEFAULT },
137 #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{pd}", DEFAULT },
138 #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{notproduct}", DEFAULT },
139 #endif
141 #ifdef _LP64
142 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{lp64_product}", DEFAULT },
143 #else
144 #define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
145 #endif // _LP64
147 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 product}", DEFAULT },
148 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd product}", DEFAULT },
149 #ifdef PRODUCT
150 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
151 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
152 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
153 #else
154 #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1}", DEFAULT },
155 #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C1 pd}", DEFAULT },
156 #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 notproduct}", DEFAULT },
157 #endif
160 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 product}", DEFAULT },
161 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd product}", DEFAULT },
162 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 diagnostic}", DEFAULT },
163 #ifdef PRODUCT
164 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
165 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) /* flag is constant */
166 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
167 #else
168 #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2}", DEFAULT },
169 #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc) { #type, XSTR(name), &name, "{C2 pd}", DEFAULT },
170 #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 notproduct}", DEFAULT },
171 #endif
174 static Flag flagTable[] = {
175 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, RUNTIME_LP64_PRODUCT_FLAG_STRUCT)
176 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)
177 #ifdef COMPILER1
178 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
179 #endif
180 #ifdef COMPILER2
181 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)
182 #endif
183 {0, NULL, NULL}
184 };
186 Flag* Flag::flags = flagTable;
187 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
189 inline bool str_equal(const char* s, char* q, size_t len) {
190 // s is null terminated, q is not!
191 if (strlen(s) != (unsigned int) len) return false;
192 return strncmp(s, q, len) == 0;
193 }
195 Flag* Flag::find_flag(char* name, size_t length) {
196 for (Flag* current = &flagTable[0]; current->name; current++) {
197 if (str_equal(current->name, name, length)) {
198 if (!(current->is_unlocked() || current->is_unlocker())) {
199 // disable use of diagnostic flags until they are unlocked
200 return NULL;
201 }
202 return current;
203 }
204 }
205 return NULL;
206 }
208 // Returns the address of the index'th element
209 static Flag* address_of_flag(CommandLineFlagWithType flag) {
210 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
211 return &Flag::flags[flag];
212 }
214 bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
215 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
216 Flag* f = &Flag::flags[flag];
217 return (f->origin == DEFAULT);
218 }
220 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
221 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
222 Flag* f = &Flag::flags[flag];
223 return (f->origin == ERGONOMIC);
224 }
226 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
227 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
228 Flag* f = &Flag::flags[flag];
229 return (f->origin == COMMAND_LINE);
230 }
232 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
233 Flag* result = Flag::find_flag((char*)name, strlen(name));
234 if (result == NULL) return false;
235 *value = (result->origin == COMMAND_LINE);
236 return true;
237 }
239 bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
240 Flag* result = Flag::find_flag(name, len);
241 if (result == NULL) return false;
242 if (!result->is_bool()) return false;
243 *value = result->get_bool();
244 return true;
245 }
247 bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin) {
248 Flag* result = Flag::find_flag(name, len);
249 if (result == NULL) return false;
250 if (!result->is_bool()) return false;
251 bool old_value = result->get_bool();
252 result->set_bool(*value);
253 *value = old_value;
254 result->origin = origin;
255 return true;
256 }
258 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
259 Flag* faddr = address_of_flag(flag);
260 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
261 faddr->set_bool(value);
262 faddr->origin = origin;
263 }
265 bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
266 Flag* result = Flag::find_flag(name, len);
267 if (result == NULL) return false;
268 if (!result->is_intx()) return false;
269 *value = result->get_intx();
270 return true;
271 }
273 bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin) {
274 Flag* result = Flag::find_flag(name, len);
275 if (result == NULL) return false;
276 if (!result->is_intx()) return false;
277 intx old_value = result->get_intx();
278 result->set_intx(*value);
279 *value = old_value;
280 result->origin = origin;
281 return true;
282 }
284 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
285 Flag* faddr = address_of_flag(flag);
286 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
287 faddr->set_intx(value);
288 faddr->origin = origin;
289 }
291 bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
292 Flag* result = Flag::find_flag(name, len);
293 if (result == NULL) return false;
294 if (!result->is_uintx()) return false;
295 *value = result->get_uintx();
296 return true;
297 }
299 bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin) {
300 Flag* result = Flag::find_flag(name, len);
301 if (result == NULL) return false;
302 if (!result->is_uintx()) return false;
303 uintx old_value = result->get_uintx();
304 result->set_uintx(*value);
305 *value = old_value;
306 result->origin = origin;
307 return true;
308 }
310 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
311 Flag* faddr = address_of_flag(flag);
312 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
313 faddr->set_uintx(value);
314 faddr->origin = origin;
315 }
317 bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
318 Flag* result = Flag::find_flag(name, len);
319 if (result == NULL) return false;
320 if (!result->is_double()) return false;
321 *value = result->get_double();
322 return true;
323 }
325 bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin) {
326 Flag* result = Flag::find_flag(name, len);
327 if (result == NULL) return false;
328 if (!result->is_double()) return false;
329 double old_value = result->get_double();
330 result->set_double(*value);
331 *value = old_value;
332 result->origin = origin;
333 return true;
334 }
336 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
337 Flag* faddr = address_of_flag(flag);
338 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
339 faddr->set_double(value);
340 faddr->origin = origin;
341 }
343 bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
344 Flag* result = Flag::find_flag(name, len);
345 if (result == NULL) return false;
346 if (!result->is_ccstr()) return false;
347 *value = result->get_ccstr();
348 return true;
349 }
351 // Contract: Flag will make private copy of the incoming value.
352 // Outgoing value is always malloc-ed, and caller MUST call free.
353 bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin) {
354 Flag* result = Flag::find_flag(name, len);
355 if (result == NULL) return false;
356 if (!result->is_ccstr()) return false;
357 ccstr old_value = result->get_ccstr();
358 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
359 strcpy(new_value, *value);
360 result->set_ccstr(new_value);
361 if (result->origin == DEFAULT && old_value != NULL) {
362 // Prior value is NOT heap allocated, but was a literal constant.
363 char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1);
364 strcpy(old_value_to_free, old_value);
365 old_value = old_value_to_free;
366 }
367 *value = old_value;
368 result->origin = origin;
369 return true;
370 }
372 // Contract: Flag will make private copy of the incoming value.
373 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin origin) {
374 Flag* faddr = address_of_flag(flag);
375 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
376 ccstr old_value = faddr->get_ccstr();
377 char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1);
378 strcpy(new_value, value);
379 faddr->set_ccstr(new_value);
380 if (faddr->origin != DEFAULT && old_value != NULL) {
381 // Prior value is heap allocated so free it.
382 FREE_C_HEAP_ARRAY(char, old_value);
383 }
384 faddr->origin = origin;
385 }
387 extern "C" {
388 static int compare_flags(const void* void_a, const void* void_b) {
389 return strcmp((*((Flag**) void_a))->name, (*((Flag**) void_b))->name);
390 }
391 }
393 void CommandLineFlags::printSetFlags() {
394 // Print which flags were set on the command line
395 // note: this method is called before the thread structure is in place
396 // which means resource allocation cannot be used.
398 // Compute size
399 int length= 0;
400 while (flagTable[length].name != NULL) length++;
402 // Sort
403 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
404 for (int index = 0; index < length; index++) {
405 array[index] = &flagTable[index];
406 }
407 qsort(array, length, sizeof(Flag*), compare_flags);
409 // Print
410 for (int i = 0; i < length; i++) {
411 if (array[i]->origin /* naked field! */) {
412 array[i]->print_as_flag(tty);
413 tty->print(" ");
414 }
415 }
416 tty->cr();
417 FREE_C_HEAP_ARRAY(Flag*, array);
418 }
420 #ifndef PRODUCT
423 void CommandLineFlags::verify() {
424 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
425 }
427 void CommandLineFlags::printFlags() {
428 // Print the flags sorted by name
429 // note: this method is called before the thread structure is in place
430 // which means resource allocation cannot be used.
432 // Compute size
433 int length= 0;
434 while (flagTable[length].name != NULL) length++;
436 // Sort
437 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
438 for (int index = 0; index < length; index++) {
439 array[index] = &flagTable[index];
440 }
441 qsort(array, length, sizeof(Flag*), compare_flags);
443 // Print
444 tty->print_cr("[Global flags]");
445 for (int i = 0; i < length; i++) {
446 if (array[i]->is_unlocked()) {
447 array[i]->print_on(tty);
448 }
449 }
450 FREE_C_HEAP_ARRAY(Flag*, array);
451 }
453 #endif
