1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/vmSymbols.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/handles.inline.hpp"
29 #include "runtime/java.hpp"
30 #include "runtime/mutex.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/os.hpp"
33 #include "runtime/perfData.hpp"
34 #include "utilities/exceptions.hpp"
35 #include "utilities/globalDefinitions.hpp"
36
37 PerfDataList* PerfDataManager::_all = NULL;
38 PerfDataList* PerfDataManager::_sampled = NULL;
39 PerfDataList* PerfDataManager::_constants = NULL;
40
41 /*
42 * The jvmstat global and subsysem jvmstat counter name spaces. The top
43 * level name spaces imply the interface stability level of the counter,
44 * which generally follows the Java package, class, and property naming
45 * conventions. The CounterNS enumeration values should be used to index
46 * into this array.
47 */
48 const char* PerfDataManager::_name_spaces[] = {
49 // top level name spaces
50 "java", // stable and supported name space
51 "com.sun", // unstable but supported name space
52 "sun", // unstable and unsupported name space
53 // subsystem name spaces
54 "java.gc", // Garbage Collection name spaces
55 "com.sun.gc",
56 "sun.gc",
57 "java.ci", // Compiler name spaces
58 "com.sun.ci",
59 "sun.ci",
60 "java.cls", // Class Loader name spaces
61 "com.sun.cls",
62 "sun.cls",
63 "java.rt", // Runtime name spaces
64 "com.sun.rt",
65 "sun.rt",
66 "java.os", // Operating System name spaces
67 "com.sun.os",
68 "sun.os",
69 "java.threads", // Threads System name spaces
70 "com.sun.threads",
71 "sun.threads",
72 "java.property", // Java Property name spaces
73 "com.sun.property",
74 "sun.property",
75 "",
76 };
77
78 PerfData::PerfData(CounterNS ns, const char* name, Units u, Variability v)
79 : _name(NULL), _u(u), _v(v), _valuep(NULL),
80 _on_c_heap(false) {
81
82 const char* prefix = PerfDataManager::ns_to_string(ns);
83
84 _name = NEW_C_HEAP_ARRAY(char, strlen(name) + strlen(prefix) + 2);
85 assert(_name != NULL && strlen(name) != 0, "invalid name");
86
87 if (ns == NULL_NS) {
88 // No prefix is added to counters with the NULL_NS namespace.
89 strcpy(_name, name);
90 // set the F_Supported flag based on the counter name prefix.
91 if (PerfDataManager::is_stable_supported(_name) ||
92 PerfDataManager::is_unstable_supported(_name)) {
93 _flags = F_Supported;
94 }
95 else {
96 _flags = F_None;
97 }
98 }
99 else {
100 sprintf(_name, "%s.%s", prefix, name);
101 // set the F_Supported flag based on the given namespace.
102 if (PerfDataManager::is_stable_supported(ns) ||
103 PerfDataManager::is_unstable_supported(ns)) {
104 _flags = F_Supported;
105 }
106 else {
107 _flags = F_None;
108 }
109 }
110 }
111
112 PerfData::~PerfData() {
113 if (_name != NULL) {
114 FREE_C_HEAP_ARRAY(char, _name);
115 }
116 if (is_on_c_heap()) {
117 FREE_C_HEAP_ARRAY(PerfDataEntry, _pdep);
118 }
119 }
120
121 void PerfData::create_entry(BasicType dtype, size_t dsize, size_t vlen) {
122
123 size_t dlen = vlen==0 ? 1 : vlen;
124
125 size_t namelen = strlen(name()) + 1; // include null terminator
126 size_t size = sizeof(PerfDataEntry) + namelen;
127 size_t pad_length = ((size % dsize) == 0) ? 0 : dsize - (size % dsize);
128 size += pad_length;
129 size_t data_start = size;
130 size += (dsize * dlen);
131
132 // align size to assure allocation in units of 8 bytes
133 int align = sizeof(jlong) - 1;
134 size = ((size + align) & ~align);
135 char* psmp = PerfMemory::alloc(size);
136
137 if (psmp == NULL) {
138 // out of PerfMemory memory resources. allocate on the C heap
139 // to avoid vm termination.
140 psmp = NEW_C_HEAP_ARRAY(char, size);
141 _on_c_heap = true;
142 }
143
144 // compute the addresses for the name and data
145 char* cname = psmp + sizeof(PerfDataEntry);
146
147 // data is in the last dsize*dlen bytes of the entry
148 void* valuep = (void*) (psmp + data_start);
149
150 assert(is_on_c_heap() || PerfMemory::contains(cname), "just checking");
151 assert(is_on_c_heap() || PerfMemory::contains((char*)valuep), "just checking");
152
153 // copy the name, including null terminator, into PerfData memory
154 strcpy(cname, name());
155
156
157 // set the header values in PerfData memory
158 PerfDataEntry* pdep = (PerfDataEntry*)psmp;
159 pdep->entry_length = (jint)size;
160 pdep->name_offset = (jint) ((uintptr_t) cname - (uintptr_t) psmp);
161 pdep->vector_length = (jint)vlen;
162 pdep->data_type = (jbyte) type2char(dtype);
163 pdep->data_units = units();
164 pdep->data_variability = variability();
165 pdep->flags = (jbyte)flags();
166 pdep->data_offset = (jint) data_start;
167
168 if (PerfTraceDataCreation) {
169 tty->print("name = %s, dtype = %d, variability = %d,"
170 " units = %d, dsize = %d, vlen = %d,"
171 " pad_length = %d, size = %d, on_c_heap = %s,"
172 " address = " INTPTR_FORMAT ","
173 " data address = " INTPTR_FORMAT "\n",
174 cname, dtype, variability(),
175 units(), dsize, vlen,
176 pad_length, size, is_on_c_heap() ? "TRUE":"FALSE",
177 psmp, valuep);
178 }
179
180 // record the start of the entry and the location of the data field.
181 _pdep = pdep;
182 _valuep = valuep;
183
184 // mark the PerfData memory region as having been updated.
185 PerfMemory::mark_updated();
186 }
187
188 PerfLong::PerfLong(CounterNS ns, const char* namep, Units u, Variability v)
189 : PerfData(ns, namep, u, v) {
190
191 create_entry(T_LONG, sizeof(jlong));
192 }
193
194 int PerfLong::format(char* buffer, int length) {
195 return jio_snprintf(buffer, length,"%lld", *(jlong*)_valuep);
196 }
197
198 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,
199 Variability v, jlong* sampled)
200 : PerfLong(ns, namep, u, v),
201 _sampled(sampled), _sample_helper(NULL) {
202
203 sample();
204 }
205
206 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,
207 Variability v, PerfLongSampleHelper* helper)
208 : PerfLong(ns, namep, u, v),
209 _sampled(NULL), _sample_helper(helper) {
210
211 sample();
212 }
213
214 void PerfLongVariant::sample() {
215
216 assert(_sample_helper != NULL || _sampled != NULL, "unexpected state");
217
218 if (_sample_helper != NULL) {
219 *(jlong*)_valuep = _sample_helper->take_sample();
220 }
221 else if (_sampled != NULL) {
222 *(jlong*)_valuep = *_sampled;
223 }
224 }
225
226 PerfByteArray::PerfByteArray(CounterNS ns, const char* namep, Units u,
227 Variability v, jint length)
228 : PerfData(ns, namep, u, v), _length(length) {
229
230 create_entry(T_BYTE, sizeof(jbyte), (size_t)_length);
231 }
232
233 void PerfString::set_string(const char* s2) {
234
235 // copy n bytes of the string, assuring the null string is
236 // copied if s2 == NULL.
237 strncpy((char *)_valuep, s2 == NULL ? "" : s2, _length);
238
239 // assure the string is null terminated when strlen(s2) >= _length
240 ((char*)_valuep)[_length-1] = '\0';
241 }
242
243 int PerfString::format(char* buffer, int length) {
244 return jio_snprintf(buffer, length, "%s", (char*)_valuep);
245 }
246
247 PerfStringConstant::PerfStringConstant(CounterNS ns, const char* namep,
248 const char* initial_value)
249 : PerfString(ns, namep, V_Constant,
250 initial_value == NULL ? 1 :
251 MIN2((jint)(strlen((char*)initial_value)+1),
252 (jint)(PerfMaxStringConstLength+1)),
253 initial_value) {
254
255 if (PrintMiscellaneous && Verbose) {
256 if (is_valid() && initial_value != NULL &&
257 ((jint)strlen(initial_value) > (jint)PerfMaxStringConstLength)) {
258
259 warning("Truncating PerfStringConstant: name = %s,"
260 " length = " INT32_FORMAT ","
261 " PerfMaxStringConstLength = " INT32_FORMAT "\n",
262 namep,
263 (jint)strlen(initial_value),
264 (jint)PerfMaxStringConstLength);
265 }
266 }
267 }
268
269
270
271
272
273
274 void PerfDataManager::destroy() {
275
276 if (_all == NULL)
277 // destroy already called, or initialization never happened
278 return;
279
280 for (int index = 0; index < _all->length(); index++) {
281 PerfData* p = _all->at(index);
282 delete p;
283 }
284
285 delete(_all);
286 delete(_sampled);
287 delete(_constants);
288
289 _all = NULL;
290 _sampled = NULL;
291 _constants = NULL;
292 }
293
294 void PerfDataManager::add_item(PerfData* p, bool sampled) {
295
296 MutexLocker ml(PerfDataManager_lock);
297
298 if (_all == NULL) {
299 _all = new PerfDataList(100);
300 }
301
302 assert(!_all->contains(p->name()), "duplicate name added");
303
304 // add to the list of all perf data items
305 _all->append(p);
306
307 if (p->variability() == PerfData::V_Constant) {
308 if (_constants == NULL) {
309 _constants = new PerfDataList(25);
310 }
311 _constants->append(p);
312 return;
313 }
314
315 if (sampled) {
316 if (_sampled == NULL) {
317 _sampled = new PerfDataList(25);
318 }
319 _sampled->append(p);
320 }
321 }
322
323 PerfDataList* PerfDataManager::all() {
324
325 MutexLocker ml(PerfDataManager_lock);
326
327 if (_all == NULL)
328 return NULL;
329
330 PerfDataList* clone = _all->clone();
331 return clone;
332 }
333
334 PerfDataList* PerfDataManager::sampled() {
335
336 MutexLocker ml(PerfDataManager_lock);
337
338 if (_sampled == NULL)
339 return NULL;
340
341 PerfDataList* clone = _sampled->clone();
342 return clone;
343 }
344
345 PerfDataList* PerfDataManager::constants() {
346
347 MutexLocker ml(PerfDataManager_lock);
348
349 if (_constants == NULL)
350 return NULL;
351
352 PerfDataList* clone = _constants->clone();
353 return clone;
354 }
355
356 char* PerfDataManager::counter_name(const char* ns, const char* name) {
357 assert(ns != NULL, "ns string required");
358 assert(name != NULL, "name string required");
359
360 size_t len = strlen(ns) + strlen(name) + 2;
361 char* result = NEW_RESOURCE_ARRAY(char, len);
362 sprintf(result, "%s.%s", ns, name);
363 return result;
364 }
365
366 char* PerfDataManager::name_space(const char* ns, const char* sub,
367 int instance) {
368 char intbuf[40];
369 jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);
370 return name_space(ns, name_space(sub, intbuf));
371 }
372
373 char *PerfDataManager::name_space(const char* ns, int instance) {
374 char intbuf[40];
375 jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);
376 return name_space(ns, intbuf);
377 }
378
379 PerfStringConstant* PerfDataManager::create_string_constant(CounterNS ns,
380 const char* name,
381 const char* s,
382 TRAPS) {
383
384 PerfStringConstant* p = new PerfStringConstant(ns, name, s);
385
386 if (!p->is_valid()) {
387 // allocation of native resources failed.
388 delete p;
389 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
390 }
391
392 add_item(p, false);
393
394 return p;
395 }
396
397 PerfLongConstant* PerfDataManager::create_long_constant(CounterNS ns,
398 const char* name,
399 PerfData::Units u,
400 jlong val, TRAPS) {
401
402 PerfLongConstant* p = new PerfLongConstant(ns, name, u, val);
403
404 if (!p->is_valid()) {
405 // allocation of native resources failed.
406 delete p;
407 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
408 }
409
410 add_item(p, false);
411
412 return p;
413 }
414
415 PerfStringVariable* PerfDataManager::create_string_variable(CounterNS ns,
416 const char* name,
417 jint max_length,
418 const char* s,
419 TRAPS) {
420
421 if (max_length == 0 && s != NULL) max_length = (jint)strlen(s);
422
423 assert(max_length != 0, "PerfStringVariable with length 0");
424
425 PerfStringVariable* p = new PerfStringVariable(ns, name, max_length, s);
426
427 if (!p->is_valid()) {
428 // allocation of native resources failed.
429 delete p;
430 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
431 }
432
433 add_item(p, false);
434
435 return p;
436 }
437
438 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
439 const char* name,
440 PerfData::Units u,
441 jlong ival, TRAPS) {
442
443 PerfLongVariable* p = new PerfLongVariable(ns, name, u, ival);
444
445 if (!p->is_valid()) {
446 // allocation of native resources failed.
447 delete p;
448 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
449 }
450
451 add_item(p, false);
452
453 return p;
454 }
455
456 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
457 const char* name,
458 PerfData::Units u,
459 jlong* sp, TRAPS) {
460
461 // Sampled counters not supported if UsePerfData is false
462 if (!UsePerfData) return NULL;
463
464 PerfLongVariable* p = new PerfLongVariable(ns, name, u, sp);
465
466 if (!p->is_valid()) {
467 // allocation of native resources failed.
468 delete p;
469 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
470 }
471
472 add_item(p, true);
473
474 return p;
475 }
476
477 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
478 const char* name,
479 PerfData::Units u,
480 PerfSampleHelper* sh,
481 TRAPS) {
482
483 // Sampled counters not supported if UsePerfData is false
484 if (!UsePerfData) return NULL;
485
486 PerfLongVariable* p = new PerfLongVariable(ns, name, u, sh);
487
488 if (!p->is_valid()) {
489 // allocation of native resources failed.
490 delete p;
491 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
492 }
493
494 add_item(p, true);
495
496 return p;
497 }
498
499 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
500 const char* name,
501 PerfData::Units u,
502 jlong ival, TRAPS) {
503
504 PerfLongCounter* p = new PerfLongCounter(ns, name, u, ival);
505
506 if (!p->is_valid()) {
507 // allocation of native resources failed.
508 delete p;
509 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
510 }
511
512 add_item(p, false);
513
514 return p;
515 }
516
517 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
518 const char* name,
519 PerfData::Units u,
520 jlong* sp, TRAPS) {
521
522 // Sampled counters not supported if UsePerfData is false
523 if (!UsePerfData) return NULL;
524
525 PerfLongCounter* p = new PerfLongCounter(ns, name, u, sp);
526
527 if (!p->is_valid()) {
528 // allocation of native resources failed.
529 delete p;
530 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
531 }
532
533 add_item(p, true);
534
535 return p;
536 }
537
538 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
539 const char* name,
540 PerfData::Units u,
541 PerfSampleHelper* sh,
542 TRAPS) {
543
544 // Sampled counters not supported if UsePerfData is false
545 if (!UsePerfData) return NULL;
546
547 PerfLongCounter* p = new PerfLongCounter(ns, name, u, sh);
548
549 if (!p->is_valid()) {
550 // allocation of native resources failed.
551 delete p;
552 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
553 }
554
555 add_item(p, true);
556
557 return p;
558 }
559
560 PerfDataList::PerfDataList(int length) {
561
562 _set = new(ResourceObj::C_HEAP) PerfDataArray(length, true);
563 }
564
565 PerfDataList::PerfDataList(PerfDataList* p) {
566
567 _set = new(ResourceObj::C_HEAP) PerfDataArray(p->length(), true);
568
569 _set->appendAll(p->get_impl());
570 }
571
572 PerfDataList::~PerfDataList() {
573
574 delete _set;
575
576 }
577
578 bool PerfDataList::by_name(void* name, PerfData* pd) {
579
580 if (pd == NULL)
581 return false;
582
583 return strcmp((const char*)name, pd->name()) == 0;
584 }
585
586 PerfData* PerfDataList::find_by_name(const char* name) {
587
588 int i = _set->find((void*)name, PerfDataList::by_name);
589
590 if (i >= 0 && i <= _set->length())
591 return _set->at(i);
592 else
593 return NULL;
594 }
595
596 PerfDataList* PerfDataList::clone() {
597
598 PerfDataList* copy = new PerfDataList(this);
599
600 assert(copy != NULL, "just checking");
601
602 return copy;
603 }