Mercurial > hg > truffle
annotate src/share/vm/services/heapDumper.cpp @ 2174:234761c55641
6608385: G1: need to support parallel reference processing
Summary: Implement support for ParallelRefProcEnabled in the reference processing that takes place at the end of G1 concurrent marking.
Reviewed-by: tonyp, ysr
author | johnc |
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date | Tue, 25 Jan 2011 10:56:22 -0800 |
parents | 17c778814856 |
children | 3582bf76420e |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/symbolTable.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "gc_implementation/shared/vmGCOperations.hpp" | |
30 #include "memory/genCollectedHeap.hpp" | |
31 #include "memory/universe.hpp" | |
32 #include "oops/objArrayKlass.hpp" | |
33 #include "runtime/javaCalls.hpp" | |
34 #include "runtime/jniHandles.hpp" | |
35 #include "runtime/reflectionUtils.hpp" | |
36 #include "runtime/vframe.hpp" | |
37 #include "runtime/vmThread.hpp" | |
38 #include "runtime/vm_operations.hpp" | |
39 #include "services/heapDumper.hpp" | |
40 #include "services/threadService.hpp" | |
41 #include "utilities/ostream.hpp" | |
42 #ifndef SERIALGC | |
43 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
44 #endif | |
0 | 45 |
46 /* | |
47 * HPROF binary format - description copied from: | |
48 * src/share/demo/jvmti/hprof/hprof_io.c | |
49 * | |
50 * | |
51 * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" | |
52 * (0-terminated) | |
53 * | |
54 * u4 size of identifiers. Identifiers are used to represent | |
55 * UTF8 strings, objects, stack traces, etc. They usually | |
56 * have the same size as host pointers. For example, on | |
57 * Solaris and Win32, the size is 4. | |
58 * u4 high word | |
59 * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 | |
60 * [record]* a sequence of records. | |
61 * | |
62 * | |
63 * Record format: | |
64 * | |
65 * u1 a TAG denoting the type of the record | |
66 * u4 number of *microseconds* since the time stamp in the | |
67 * header. (wraps around in a little more than an hour) | |
68 * u4 number of bytes *remaining* in the record. Note that | |
69 * this number excludes the tag and the length field itself. | |
70 * [u1]* BODY of the record (a sequence of bytes) | |
71 * | |
72 * | |
73 * The following TAGs are supported: | |
74 * | |
75 * TAG BODY notes | |
76 *---------------------------------------------------------- | |
77 * HPROF_UTF8 a UTF8-encoded name | |
78 * | |
79 * id name ID | |
80 * [u1]* UTF8 characters (no trailing zero) | |
81 * | |
82 * HPROF_LOAD_CLASS a newly loaded class | |
83 * | |
84 * u4 class serial number (> 0) | |
85 * id class object ID | |
86 * u4 stack trace serial number | |
87 * id class name ID | |
88 * | |
89 * HPROF_UNLOAD_CLASS an unloading class | |
90 * | |
91 * u4 class serial_number | |
92 * | |
93 * HPROF_FRAME a Java stack frame | |
94 * | |
95 * id stack frame ID | |
96 * id method name ID | |
97 * id method signature ID | |
98 * id source file name ID | |
99 * u4 class serial number | |
100 * i4 line number. >0: normal | |
101 * -1: unknown | |
102 * -2: compiled method | |
103 * -3: native method | |
104 * | |
105 * HPROF_TRACE a Java stack trace | |
106 * | |
107 * u4 stack trace serial number | |
108 * u4 thread serial number | |
109 * u4 number of frames | |
110 * [id]* stack frame IDs | |
111 * | |
112 * | |
113 * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC | |
114 * | |
115 * u2 flags 0x0001: incremental vs. complete | |
116 * 0x0002: sorted by allocation vs. live | |
117 * 0x0004: whether to force a GC | |
118 * u4 cutoff ratio | |
119 * u4 total live bytes | |
120 * u4 total live instances | |
121 * u8 total bytes allocated | |
122 * u8 total instances allocated | |
123 * u4 number of sites that follow | |
124 * [u1 is_array: 0: normal object | |
125 * 2: object array | |
126 * 4: boolean array | |
127 * 5: char array | |
128 * 6: float array | |
129 * 7: double array | |
130 * 8: byte array | |
131 * 9: short array | |
132 * 10: int array | |
133 * 11: long array | |
134 * u4 class serial number (may be zero during startup) | |
135 * u4 stack trace serial number | |
136 * u4 number of bytes alive | |
137 * u4 number of instances alive | |
138 * u4 number of bytes allocated | |
139 * u4]* number of instance allocated | |
140 * | |
141 * HPROF_START_THREAD a newly started thread. | |
142 * | |
143 * u4 thread serial number (> 0) | |
144 * id thread object ID | |
145 * u4 stack trace serial number | |
146 * id thread name ID | |
147 * id thread group name ID | |
148 * id thread group parent name ID | |
149 * | |
150 * HPROF_END_THREAD a terminating thread. | |
151 * | |
152 * u4 thread serial number | |
153 * | |
154 * HPROF_HEAP_SUMMARY heap summary | |
155 * | |
156 * u4 total live bytes | |
157 * u4 total live instances | |
158 * u8 total bytes allocated | |
159 * u8 total instances allocated | |
160 * | |
161 * HPROF_HEAP_DUMP denote a heap dump | |
162 * | |
163 * [heap dump sub-records]* | |
164 * | |
165 * There are four kinds of heap dump sub-records: | |
166 * | |
167 * u1 sub-record type | |
168 * | |
169 * HPROF_GC_ROOT_UNKNOWN unknown root | |
170 * | |
171 * id object ID | |
172 * | |
173 * HPROF_GC_ROOT_THREAD_OBJ thread object | |
174 * | |
175 * id thread object ID (may be 0 for a | |
176 * thread newly attached through JNI) | |
177 * u4 thread sequence number | |
178 * u4 stack trace sequence number | |
179 * | |
180 * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root | |
181 * | |
182 * id object ID | |
183 * id JNI global ref ID | |
184 * | |
185 * HPROF_GC_ROOT_JNI_LOCAL JNI local ref | |
186 * | |
187 * id object ID | |
188 * u4 thread serial number | |
189 * u4 frame # in stack trace (-1 for empty) | |
190 * | |
191 * HPROF_GC_ROOT_JAVA_FRAME Java stack frame | |
192 * | |
193 * id object ID | |
194 * u4 thread serial number | |
195 * u4 frame # in stack trace (-1 for empty) | |
196 * | |
197 * HPROF_GC_ROOT_NATIVE_STACK Native stack | |
198 * | |
199 * id object ID | |
200 * u4 thread serial number | |
201 * | |
202 * HPROF_GC_ROOT_STICKY_CLASS System class | |
203 * | |
204 * id object ID | |
205 * | |
206 * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block | |
207 * | |
208 * id object ID | |
209 * u4 thread serial number | |
210 * | |
211 * HPROF_GC_ROOT_MONITOR_USED Busy monitor | |
212 * | |
213 * id object ID | |
214 * | |
215 * HPROF_GC_CLASS_DUMP dump of a class object | |
216 * | |
217 * id class object ID | |
218 * u4 stack trace serial number | |
219 * id super class object ID | |
220 * id class loader object ID | |
221 * id signers object ID | |
222 * id protection domain object ID | |
223 * id reserved | |
224 * id reserved | |
225 * | |
226 * u4 instance size (in bytes) | |
227 * | |
228 * u2 size of constant pool | |
229 * [u2, constant pool index, | |
230 * ty, type | |
231 * 2: object | |
232 * 4: boolean | |
233 * 5: char | |
234 * 6: float | |
235 * 7: double | |
236 * 8: byte | |
237 * 9: short | |
238 * 10: int | |
239 * 11: long | |
240 * vl]* and value | |
241 * | |
242 * u2 number of static fields | |
243 * [id, static field name, | |
244 * ty, type, | |
245 * vl]* and value | |
246 * | |
247 * u2 number of inst. fields (not inc. super) | |
248 * [id, instance field name, | |
249 * ty]* type | |
250 * | |
251 * HPROF_GC_INSTANCE_DUMP dump of a normal object | |
252 * | |
253 * id object ID | |
254 * u4 stack trace serial number | |
255 * id class object ID | |
256 * u4 number of bytes that follow | |
257 * [vl]* instance field values (class, followed | |
258 * by super, super's super ...) | |
259 * | |
260 * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array | |
261 * | |
262 * id array object ID | |
263 * u4 stack trace serial number | |
264 * u4 number of elements | |
265 * id array class ID | |
266 * [id]* elements | |
267 * | |
268 * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array | |
269 * | |
270 * id array object ID | |
271 * u4 stack trace serial number | |
272 * u4 number of elements | |
273 * u1 element type | |
274 * 4: boolean array | |
275 * 5: char array | |
276 * 6: float array | |
277 * 7: double array | |
278 * 8: byte array | |
279 * 9: short array | |
280 * 10: int array | |
281 * 11: long array | |
282 * [u1]* elements | |
283 * | |
284 * HPROF_CPU_SAMPLES a set of sample traces of running threads | |
285 * | |
286 * u4 total number of samples | |
287 * u4 # of traces | |
288 * [u4 # of samples | |
289 * u4]* stack trace serial number | |
290 * | |
291 * HPROF_CONTROL_SETTINGS the settings of on/off switches | |
292 * | |
293 * u4 0x00000001: alloc traces on/off | |
294 * 0x00000002: cpu sampling on/off | |
295 * u2 stack trace depth | |
296 * | |
297 * | |
298 * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally | |
299 * be generated as a sequence of heap dump segments. This sequence is | |
300 * terminated by an end record. The additional tags allowed by format | |
301 * "JAVA PROFILE 1.0.2" are: | |
302 * | |
303 * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment | |
304 * | |
305 * [heap dump sub-records]* | |
306 * The same sub-record types allowed by HPROF_HEAP_DUMP | |
307 * | |
308 * HPROF_HEAP_DUMP_END denotes the end of a heap dump | |
309 * | |
310 */ | |
311 | |
312 | |
313 // HPROF tags | |
314 | |
315 typedef enum { | |
316 // top-level records | |
317 HPROF_UTF8 = 0x01, | |
318 HPROF_LOAD_CLASS = 0x02, | |
319 HPROF_UNLOAD_CLASS = 0x03, | |
320 HPROF_FRAME = 0x04, | |
321 HPROF_TRACE = 0x05, | |
322 HPROF_ALLOC_SITES = 0x06, | |
323 HPROF_HEAP_SUMMARY = 0x07, | |
324 HPROF_START_THREAD = 0x0A, | |
325 HPROF_END_THREAD = 0x0B, | |
326 HPROF_HEAP_DUMP = 0x0C, | |
327 HPROF_CPU_SAMPLES = 0x0D, | |
328 HPROF_CONTROL_SETTINGS = 0x0E, | |
329 | |
330 // 1.0.2 record types | |
331 HPROF_HEAP_DUMP_SEGMENT = 0x1C, | |
332 HPROF_HEAP_DUMP_END = 0x2C, | |
333 | |
334 // field types | |
335 HPROF_ARRAY_OBJECT = 0x01, | |
336 HPROF_NORMAL_OBJECT = 0x02, | |
337 HPROF_BOOLEAN = 0x04, | |
338 HPROF_CHAR = 0x05, | |
339 HPROF_FLOAT = 0x06, | |
340 HPROF_DOUBLE = 0x07, | |
341 HPROF_BYTE = 0x08, | |
342 HPROF_SHORT = 0x09, | |
343 HPROF_INT = 0x0A, | |
344 HPROF_LONG = 0x0B, | |
345 | |
346 // data-dump sub-records | |
347 HPROF_GC_ROOT_UNKNOWN = 0xFF, | |
348 HPROF_GC_ROOT_JNI_GLOBAL = 0x01, | |
349 HPROF_GC_ROOT_JNI_LOCAL = 0x02, | |
350 HPROF_GC_ROOT_JAVA_FRAME = 0x03, | |
351 HPROF_GC_ROOT_NATIVE_STACK = 0x04, | |
352 HPROF_GC_ROOT_STICKY_CLASS = 0x05, | |
353 HPROF_GC_ROOT_THREAD_BLOCK = 0x06, | |
354 HPROF_GC_ROOT_MONITOR_USED = 0x07, | |
355 HPROF_GC_ROOT_THREAD_OBJ = 0x08, | |
356 HPROF_GC_CLASS_DUMP = 0x20, | |
357 HPROF_GC_INSTANCE_DUMP = 0x21, | |
358 HPROF_GC_OBJ_ARRAY_DUMP = 0x22, | |
359 HPROF_GC_PRIM_ARRAY_DUMP = 0x23 | |
360 } hprofTag; | |
361 | |
362 // Default stack trace ID (used for dummy HPROF_TRACE record) | |
363 enum { | |
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364 STACK_TRACE_ID = 1, |
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365 INITIAL_CLASS_COUNT = 200 |
0 | 366 }; |
367 | |
368 // Supports I/O operations on a dump file | |
369 | |
370 class DumpWriter : public StackObj { | |
371 private: | |
372 enum { | |
373 io_buffer_size = 8*M | |
374 }; | |
375 | |
376 int _fd; // file descriptor (-1 if dump file not open) | |
377 jlong _bytes_written; // number of byte written to dump file | |
378 | |
379 char* _buffer; // internal buffer | |
380 int _size; | |
381 int _pos; | |
382 | |
383 char* _error; // error message when I/O fails | |
384 | |
385 void set_file_descriptor(int fd) { _fd = fd; } | |
386 int file_descriptor() const { return _fd; } | |
387 | |
388 char* buffer() const { return _buffer; } | |
389 int buffer_size() const { return _size; } | |
390 int position() const { return _pos; } | |
391 void set_position(int pos) { _pos = pos; } | |
392 | |
393 void set_error(const char* error) { _error = (char*)os::strdup(error); } | |
394 | |
395 // all I/O go through this function | |
396 void write_internal(void* s, int len); | |
397 | |
398 public: | |
399 DumpWriter(const char* path); | |
400 ~DumpWriter(); | |
401 | |
402 void close(); | |
403 bool is_open() const { return file_descriptor() >= 0; } | |
404 void flush(); | |
405 | |
406 // total number of bytes written to the disk | |
407 jlong bytes_written() const { return _bytes_written; } | |
408 | |
409 // adjust the number of bytes written to disk (used to keep the count | |
410 // of the number of bytes written in case of rewrites) | |
411 void adjust_bytes_written(jlong n) { _bytes_written += n; } | |
412 | |
413 // number of (buffered) bytes as yet unwritten to the dump file | |
414 jlong bytes_unwritten() const { return (jlong)position(); } | |
415 | |
416 char* error() const { return _error; } | |
417 | |
418 jlong current_offset(); | |
419 void seek_to_offset(jlong pos); | |
420 | |
421 // writer functions | |
422 void write_raw(void* s, int len); | |
423 void write_u1(u1 x) { write_raw((void*)&x, 1); } | |
424 void write_u2(u2 x); | |
425 void write_u4(u4 x); | |
426 void write_u8(u8 x); | |
427 void write_objectID(oop o); | |
428 void write_classID(Klass* k); | |
396
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429 void write_id(u4 x); |
0 | 430 }; |
431 | |
432 DumpWriter::DumpWriter(const char* path) { | |
433 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
434 // sufficient memory then reduce size until we can allocate something. | |
435 _size = io_buffer_size; | |
436 do { | |
437 _buffer = (char*)os::malloc(_size); | |
438 if (_buffer == NULL) { | |
439 _size = _size >> 1; | |
440 } | |
441 } while (_buffer == NULL && _size > 0); | |
442 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
443 _pos = 0; | |
444 _error = NULL; | |
445 _bytes_written = 0L; | |
446 _fd = os::create_binary_file(path, false); // don't replace existing file | |
447 | |
448 // if the open failed we record the error | |
449 if (_fd < 0) { | |
450 _error = (char*)os::strdup(strerror(errno)); | |
451 } | |
452 } | |
453 | |
454 DumpWriter::~DumpWriter() { | |
455 // flush and close dump file | |
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456 if (is_open()) { |
0 | 457 close(); |
458 } | |
459 if (_buffer != NULL) os::free(_buffer); | |
460 if (_error != NULL) os::free(_error); | |
461 } | |
462 | |
463 // closes dump file (if open) | |
464 void DumpWriter::close() { | |
465 // flush and close dump file | |
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466 if (is_open()) { |
0 | 467 flush(); |
468 ::close(file_descriptor()); | |
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469 set_file_descriptor(-1); |
0 | 470 } |
471 } | |
472 | |
473 // write directly to the file | |
474 void DumpWriter::write_internal(void* s, int len) { | |
475 if (is_open()) { | |
476 int n = ::write(file_descriptor(), s, len); | |
477 if (n > 0) { | |
478 _bytes_written += n; | |
479 } | |
480 if (n != len) { | |
481 if (n < 0) { | |
482 set_error(strerror(errno)); | |
483 } else { | |
484 set_error("file size limit"); | |
485 } | |
486 ::close(file_descriptor()); | |
487 set_file_descriptor(-1); | |
488 } | |
489 } | |
490 } | |
491 | |
492 // write raw bytes | |
493 void DumpWriter::write_raw(void* s, int len) { | |
494 if (is_open()) { | |
495 // flush buffer to make toom | |
496 if ((position()+ len) >= buffer_size()) { | |
497 flush(); | |
498 } | |
499 | |
500 // buffer not available or too big to buffer it | |
501 if ((buffer() == NULL) || (len >= buffer_size())) { | |
502 write_internal(s, len); | |
503 } else { | |
504 // Should optimize this for u1/u2/u4/u8 sizes. | |
505 memcpy(buffer() + position(), s, len); | |
506 set_position(position() + len); | |
507 } | |
508 } | |
509 } | |
510 | |
511 // flush any buffered bytes to the file | |
512 void DumpWriter::flush() { | |
513 if (is_open() && position() > 0) { | |
514 write_internal(buffer(), position()); | |
515 set_position(0); | |
516 } | |
517 } | |
518 | |
519 | |
520 jlong DumpWriter::current_offset() { | |
521 if (is_open()) { | |
522 // the offset is the file offset plus whatever we have buffered | |
523 jlong offset = os::current_file_offset(file_descriptor()); | |
524 assert(offset >= 0, "lseek failed"); | |
525 return offset + (jlong)position(); | |
526 } else { | |
527 return (jlong)-1; | |
528 } | |
529 } | |
530 | |
531 void DumpWriter::seek_to_offset(jlong off) { | |
532 assert(off >= 0, "bad offset"); | |
533 | |
534 // need to flush before seeking | |
535 flush(); | |
536 | |
537 // may be closed due to I/O error | |
538 if (is_open()) { | |
539 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
540 assert(n >= 0, "lseek failed"); | |
541 } | |
542 } | |
543 | |
544 void DumpWriter::write_u2(u2 x) { | |
545 u2 v; | |
546 Bytes::put_Java_u2((address)&v, x); | |
547 write_raw((void*)&v, 2); | |
548 } | |
549 | |
550 void DumpWriter::write_u4(u4 x) { | |
551 u4 v; | |
552 Bytes::put_Java_u4((address)&v, x); | |
553 write_raw((void*)&v, 4); | |
554 } | |
555 | |
556 void DumpWriter::write_u8(u8 x) { | |
557 u8 v; | |
558 Bytes::put_Java_u8((address)&v, x); | |
559 write_raw((void*)&v, 8); | |
560 } | |
561 | |
562 void DumpWriter::write_objectID(oop o) { | |
563 address a = (address)((uintptr_t)o); | |
564 #ifdef _LP64 | |
565 write_u8((u8)a); | |
566 #else | |
567 write_u4((u4)a); | |
568 #endif | |
569 } | |
570 | |
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571 void DumpWriter::write_id(u4 x) { |
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572 #ifdef _LP64 |
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573 write_u8((u8) x); |
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574 #else |
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575 write_u4(x); |
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576 #endif |
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577 } |
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578 |
0 | 579 // We use java mirror as the class ID |
580 void DumpWriter::write_classID(Klass* k) { | |
581 write_objectID(k->java_mirror()); | |
582 } | |
583 | |
584 | |
585 | |
586 // Support class with a collection of functions used when dumping the heap | |
587 | |
588 class DumperSupport : AllStatic { | |
589 public: | |
590 | |
591 // write a header of the given type | |
592 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
593 | |
594 // returns hprof tag for the given type signature | |
595 static hprofTag sig2tag(symbolOop sig); | |
596 // returns hprof tag for the given basic type | |
597 static hprofTag type2tag(BasicType type); | |
598 | |
599 // returns the size of the instance of the given class | |
600 static u4 instance_size(klassOop k); | |
601 | |
602 // dump a jfloat | |
603 static void dump_float(DumpWriter* writer, jfloat f); | |
604 // dump a jdouble | |
605 static void dump_double(DumpWriter* writer, jdouble d); | |
606 // dumps the raw value of the given field | |
607 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
608 // dumps static fields of the given class | |
609 static void dump_static_fields(DumpWriter* writer, klassOop k); | |
610 // dump the raw values of the instance fields of the given object | |
611 static void dump_instance_fields(DumpWriter* writer, oop o); | |
612 // dumps the definition of the instance fields for a given class | |
613 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); | |
614 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
615 static void dump_instance(DumpWriter* writer, oop o); | |
616 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
617 // array classes | |
618 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); | |
619 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
620 // class (and each multi-dimensional array class too) | |
621 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); | |
622 | |
623 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
624 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
625 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
626 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
396
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627 // create HPROF_FRAME record for the given method and bci |
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628 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, methodOop m, int bci); |
0 | 629 }; |
630 | |
631 // write a header of the given type | |
632 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
633 writer->write_u1((u1)tag); | |
634 writer->write_u4(0); // current ticks | |
635 writer->write_u4(len); | |
636 } | |
637 | |
638 // returns hprof tag for the given type signature | |
639 hprofTag DumperSupport::sig2tag(symbolOop sig) { | |
640 switch (sig->byte_at(0)) { | |
641 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
642 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
643 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
644 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
645 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
646 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
647 case JVM_SIGNATURE_INT : return HPROF_INT; | |
648 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
649 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
650 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
651 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
652 } | |
653 } | |
654 | |
655 hprofTag DumperSupport::type2tag(BasicType type) { | |
656 switch (type) { | |
657 case T_BYTE : return HPROF_BYTE; | |
658 case T_CHAR : return HPROF_CHAR; | |
659 case T_FLOAT : return HPROF_FLOAT; | |
660 case T_DOUBLE : return HPROF_DOUBLE; | |
661 case T_INT : return HPROF_INT; | |
662 case T_LONG : return HPROF_LONG; | |
663 case T_SHORT : return HPROF_SHORT; | |
664 case T_BOOLEAN : return HPROF_BOOLEAN; | |
665 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
666 } | |
667 } | |
668 | |
669 // dump a jfloat | |
670 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
671 if (g_isnan(f)) { | |
672 writer->write_u4(0x7fc00000); // collapsing NaNs | |
673 } else { | |
674 union { | |
675 int i; | |
676 float f; | |
677 } u; | |
678 u.f = (float)f; | |
679 writer->write_u4((u4)u.i); | |
680 } | |
681 } | |
682 | |
683 // dump a jdouble | |
684 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
685 union { | |
686 jlong l; | |
687 double d; | |
688 } u; | |
689 if (g_isnan(d)) { // collapsing NaNs | |
690 u.l = (jlong)(0x7ff80000); | |
691 u.l = (u.l << 32); | |
692 } else { | |
693 u.d = (double)d; | |
694 } | |
695 writer->write_u8((u8)u.l); | |
696 } | |
697 | |
698 // dumps the raw value of the given field | |
699 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
700 switch (type) { | |
701 case JVM_SIGNATURE_CLASS : | |
702 case JVM_SIGNATURE_ARRAY : { | |
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703 oop o; |
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704 if (UseCompressedOops) { |
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705 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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706 } else { |
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707 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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708 } |
0 | 709 |
710 // reflection and sun.misc.Unsafe classes may have a reference to a | |
711 // klassOop so filter it out. | |
712 if (o != NULL && o->is_klass()) { | |
713 o = NULL; | |
714 } | |
715 | |
716 // FIXME: When sharing is enabled we don't emit field references to objects | |
717 // in shared spaces. We can remove this once we write records for the classes | |
718 // and strings that are shared. | |
719 if (o != NULL && o->is_shared()) { | |
720 o = NULL; | |
721 } | |
722 writer->write_objectID(o); | |
723 break; | |
724 } | |
725 case JVM_SIGNATURE_BYTE : { | |
726 jbyte* b = (jbyte*)addr; | |
727 writer->write_u1((u1)*b); | |
728 break; | |
729 } | |
730 case JVM_SIGNATURE_CHAR : { | |
731 jchar* c = (jchar*)addr; | |
732 writer->write_u2((u2)*c); | |
733 break; | |
734 } | |
735 case JVM_SIGNATURE_SHORT : { | |
736 jshort* s = (jshort*)addr; | |
737 writer->write_u2((u2)*s); | |
738 break; | |
739 } | |
740 case JVM_SIGNATURE_FLOAT : { | |
741 jfloat* f = (jfloat*)addr; | |
742 dump_float(writer, *f); | |
743 break; | |
744 } | |
745 case JVM_SIGNATURE_DOUBLE : { | |
746 jdouble* f = (jdouble*)addr; | |
747 dump_double(writer, *f); | |
748 break; | |
749 } | |
750 case JVM_SIGNATURE_INT : { | |
751 jint* i = (jint*)addr; | |
752 writer->write_u4((u4)*i); | |
753 break; | |
754 } | |
755 case JVM_SIGNATURE_LONG : { | |
756 jlong* l = (jlong*)addr; | |
757 writer->write_u8((u8)*l); | |
758 break; | |
759 } | |
760 case JVM_SIGNATURE_BOOLEAN : { | |
761 jboolean* b = (jboolean*)addr; | |
762 writer->write_u1((u1)*b); | |
763 break; | |
764 } | |
765 default : ShouldNotReachHere(); | |
766 } | |
767 } | |
768 | |
769 // returns the size of the instance of the given class | |
770 u4 DumperSupport::instance_size(klassOop k) { | |
771 HandleMark hm; | |
772 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
773 | |
774 int size = 0; | |
775 | |
776 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
777 if (!fld.access_flags().is_static()) { | |
778 symbolOop sig = fld.signature(); | |
779 switch (sig->byte_at(0)) { | |
780 case JVM_SIGNATURE_CLASS : | |
781 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
782 | |
783 case JVM_SIGNATURE_BYTE : | |
784 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
785 | |
786 case JVM_SIGNATURE_CHAR : | |
787 case JVM_SIGNATURE_SHORT : size += 2; break; | |
788 | |
789 case JVM_SIGNATURE_INT : | |
790 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
791 | |
792 case JVM_SIGNATURE_LONG : | |
793 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
794 | |
795 default : ShouldNotReachHere(); | |
796 } | |
797 } | |
798 } | |
799 return (u4)size; | |
800 } | |
801 | |
802 // dumps static fields of the given class | |
803 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { | |
804 HandleMark hm; | |
805 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
806 | |
807 // pass 1 - count the static fields | |
808 u2 field_count = 0; | |
809 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
810 if (fldc.access_flags().is_static()) field_count++; | |
811 } | |
812 | |
813 writer->write_u2(field_count); | |
814 | |
815 // pass 2 - dump the field descriptors and raw values | |
816 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
817 if (fld.access_flags().is_static()) { | |
818 symbolOop sig = fld.signature(); | |
819 | |
820 writer->write_objectID(fld.name()); // name | |
821 writer->write_u1(sig2tag(sig)); // type | |
822 | |
823 // value | |
824 int offset = fld.offset(); | |
825 address addr = (address)k + offset; | |
826 | |
827 dump_field_value(writer, sig->byte_at(0), addr); | |
828 } | |
829 } | |
830 } | |
831 | |
832 // dump the raw values of the instance fields of the given object | |
833 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
834 HandleMark hm; | |
835 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
836 | |
837 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
838 if (!fld.access_flags().is_static()) { | |
839 symbolOop sig = fld.signature(); | |
840 address addr = (address)o + fld.offset(); | |
841 | |
842 dump_field_value(writer, sig->byte_at(0), addr); | |
843 } | |
844 } | |
845 } | |
846 | |
847 // dumps the definition of the instance fields for a given class | |
848 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { | |
849 HandleMark hm; | |
850 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
851 | |
852 // pass 1 - count the instance fields | |
853 u2 field_count = 0; | |
854 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
855 if (!fldc.access_flags().is_static()) field_count++; | |
856 } | |
857 | |
858 writer->write_u2(field_count); | |
859 | |
860 // pass 2 - dump the field descriptors | |
861 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
862 if (!fld.access_flags().is_static()) { | |
863 symbolOop sig = fld.signature(); | |
864 | |
865 writer->write_objectID(fld.name()); // name | |
866 writer->write_u1(sig2tag(sig)); // type | |
867 } | |
868 } | |
869 } | |
870 | |
871 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
872 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
873 klassOop k = o->klass(); | |
874 | |
875 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
876 writer->write_objectID(o); | |
877 writer->write_u4(STACK_TRACE_ID); | |
878 | |
879 // class ID | |
880 writer->write_classID(Klass::cast(k)); | |
881 | |
882 // number of bytes that follow | |
883 writer->write_u4(instance_size(k) ); | |
884 | |
885 // field values | |
886 dump_instance_fields(writer, o); | |
887 } | |
888 | |
889 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
890 // its array classes | |
891 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { | |
892 Klass* klass = Klass::cast(k); | |
893 assert(klass->oop_is_instance(), "not an instanceKlass"); | |
894 instanceKlass* ik = (instanceKlass*)klass; | |
895 | |
896 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
897 | |
898 // class ID | |
899 writer->write_classID(ik); | |
900 writer->write_u4(STACK_TRACE_ID); | |
901 | |
902 // super class ID | |
903 klassOop java_super = ik->java_super(); | |
904 if (java_super == NULL) { | |
905 writer->write_objectID(NULL); | |
906 } else { | |
907 writer->write_classID(Klass::cast(java_super)); | |
908 } | |
909 | |
910 writer->write_objectID(ik->class_loader()); | |
911 writer->write_objectID(ik->signers()); | |
912 writer->write_objectID(ik->protection_domain()); | |
913 | |
914 // reserved | |
915 writer->write_objectID(NULL); | |
916 writer->write_objectID(NULL); | |
917 | |
918 // instance size | |
919 writer->write_u4(DumperSupport::instance_size(k)); | |
920 | |
921 // size of constant pool - ignored by HAT 1.1 | |
922 writer->write_u2(0); | |
923 | |
924 // number of static fields | |
925 dump_static_fields(writer, k); | |
926 | |
927 // description of instance fields | |
928 dump_instance_field_descriptors(writer, k); | |
929 | |
930 // array classes | |
931 k = klass->array_klass_or_null(); | |
932 while (k != NULL) { | |
933 Klass* klass = Klass::cast(k); | |
934 assert(klass->oop_is_objArray(), "not an objArrayKlass"); | |
935 | |
936 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
937 writer->write_classID(klass); | |
938 writer->write_u4(STACK_TRACE_ID); | |
939 | |
940 // super class of array classes is java.lang.Object | |
941 java_super = klass->java_super(); | |
942 assert(java_super != NULL, "checking"); | |
943 writer->write_classID(Klass::cast(java_super)); | |
944 | |
945 writer->write_objectID(ik->class_loader()); | |
946 writer->write_objectID(ik->signers()); | |
947 writer->write_objectID(ik->protection_domain()); | |
948 | |
949 writer->write_objectID(NULL); // reserved | |
950 writer->write_objectID(NULL); | |
951 writer->write_u4(0); // instance size | |
952 writer->write_u2(0); // constant pool | |
953 writer->write_u2(0); // static fields | |
954 writer->write_u2(0); // instance fields | |
955 | |
956 // get the array class for the next rank | |
957 k = klass->array_klass_or_null(); | |
958 } | |
959 } | |
960 | |
961 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
962 // class (and each multi-dimensional array class too) | |
963 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { | |
964 // array classes | |
965 while (k != NULL) { | |
966 Klass* klass = Klass::cast(k); | |
967 | |
968 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
969 writer->write_classID(klass); | |
970 writer->write_u4(STACK_TRACE_ID); | |
971 | |
972 // super class of array classes is java.lang.Object | |
973 klassOop java_super = klass->java_super(); | |
974 assert(java_super != NULL, "checking"); | |
975 writer->write_classID(Klass::cast(java_super)); | |
976 | |
977 writer->write_objectID(NULL); // loader | |
978 writer->write_objectID(NULL); // signers | |
979 writer->write_objectID(NULL); // protection domain | |
980 | |
981 writer->write_objectID(NULL); // reserved | |
982 writer->write_objectID(NULL); | |
983 writer->write_u4(0); // instance size | |
984 writer->write_u2(0); // constant pool | |
985 writer->write_u2(0); // static fields | |
986 writer->write_u2(0); // instance fields | |
987 | |
988 // get the array class for the next rank | |
989 k = klass->array_klass_or_null(); | |
990 } | |
991 } | |
992 | |
993 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
994 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
995 | |
996 // filter this | |
997 if (array->klass() == Universe::systemObjArrayKlassObj()) return; | |
998 | |
999 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
1000 writer->write_objectID(array); | |
1001 writer->write_u4(STACK_TRACE_ID); | |
1002 writer->write_u4((u4)array->length()); | |
1003 | |
1004 // array class ID | |
1005 writer->write_classID(Klass::cast(array->klass())); | |
1006 | |
1007 // [id]* elements | |
1008 for (int index=0; index<array->length(); index++) { | |
1009 oop o = array->obj_at(index); | |
1010 writer->write_objectID(o); | |
1011 } | |
1012 } | |
1013 | |
1014 #define WRITE_ARRAY(Array, Type, Size) \ | |
1015 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
1016 | |
1017 | |
1018 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
1019 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
1020 BasicType type = typeArrayKlass::cast(array->klass())->element_type(); | |
1021 | |
1022 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
1023 writer->write_objectID(array); | |
1024 writer->write_u4(STACK_TRACE_ID); | |
1025 writer->write_u4((u4)array->length()); | |
1026 writer->write_u1(type2tag(type)); | |
1027 | |
1028 // nothing to copy | |
1029 if (array->length() == 0) { | |
1030 return; | |
1031 } | |
1032 | |
1033 // If the byte ordering is big endian then we can copy most types directly | |
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1034 int length_in_bytes = array->length() * type2aelembytes(type); |
0 | 1035 assert(length_in_bytes > 0, "nothing to copy"); |
1036 | |
1037 switch (type) { | |
1038 case T_INT : { | |
1039 if (Bytes::is_Java_byte_ordering_different()) { | |
1040 WRITE_ARRAY(array, int, u4); | |
1041 } else { | |
1042 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
1043 } | |
1044 break; | |
1045 } | |
1046 case T_BYTE : { | |
1047 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
1048 break; | |
1049 } | |
1050 case T_CHAR : { | |
1051 if (Bytes::is_Java_byte_ordering_different()) { | |
1052 WRITE_ARRAY(array, char, u2); | |
1053 } else { | |
1054 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
1055 } | |
1056 break; | |
1057 } | |
1058 case T_SHORT : { | |
1059 if (Bytes::is_Java_byte_ordering_different()) { | |
1060 WRITE_ARRAY(array, short, u2); | |
1061 } else { | |
1062 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
1063 } | |
1064 break; | |
1065 } | |
1066 case T_BOOLEAN : { | |
1067 if (Bytes::is_Java_byte_ordering_different()) { | |
1068 WRITE_ARRAY(array, bool, u1); | |
1069 } else { | |
1070 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
1071 } | |
1072 break; | |
1073 } | |
1074 case T_LONG : { | |
1075 if (Bytes::is_Java_byte_ordering_different()) { | |
1076 WRITE_ARRAY(array, long, u8); | |
1077 } else { | |
1078 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
1079 } | |
1080 break; | |
1081 } | |
1082 | |
1083 // handle float/doubles in a special value to ensure than NaNs are | |
1084 // written correctly. TO DO: Check if we can avoid this on processors that | |
1085 // use IEEE 754. | |
1086 | |
1087 case T_FLOAT : { | |
1088 for (int i=0; i<array->length(); i++) { | |
1089 dump_float( writer, array->float_at(i) ); | |
1090 } | |
1091 break; | |
1092 } | |
1093 case T_DOUBLE : { | |
1094 for (int i=0; i<array->length(); i++) { | |
1095 dump_double( writer, array->double_at(i) ); | |
1096 } | |
1097 break; | |
1098 } | |
1099 default : ShouldNotReachHere(); | |
1100 } | |
1101 } | |
1102 | |
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1103 // create a HPROF_FRAME record of the given methodOop and bci |
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1104 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1105 int frame_serial_num, |
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1106 int class_serial_num, |
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1107 methodOop m, |
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1108 int bci) { |
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1109 int line_number; |
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1110 if (m->is_native()) { |
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1111 line_number = -3; // native frame |
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1112 } else { |
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1113 line_number = m->line_number_from_bci(bci); |
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1114 } |
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1115 |
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1116 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1117 writer->write_id(frame_serial_num); // frame serial number |
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1118 writer->write_objectID(m->name()); // method's name |
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1119 writer->write_objectID(m->signature()); // method's signature |
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1120 |
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1121 assert(Klass::cast(m->method_holder())->oop_is_instance(), "not instanceKlass"); |
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1122 writer->write_objectID(instanceKlass::cast(m->method_holder())->source_file_name()); // source file name |
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1123 writer->write_u4(class_serial_num); // class serial number |
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1124 writer->write_u4((u4) line_number); // line number |
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1125 } |
0 | 1126 |
1127 // Support class used to generate HPROF_UTF8 records from the entries in the | |
1128 // SymbolTable. | |
1129 | |
1130 class SymbolTableDumper : public OopClosure { | |
1131 private: | |
1132 DumpWriter* _writer; | |
1133 DumpWriter* writer() const { return _writer; } | |
1134 public: | |
1135 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
1136 void do_oop(oop* obj_p); | |
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1137 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1138 }; |
1139 | |
1140 void SymbolTableDumper::do_oop(oop* obj_p) { | |
1141 ResourceMark rm; | |
1142 symbolOop sym = (symbolOop)*obj_p; | |
1143 | |
1144 int len = sym->utf8_length(); | |
1145 if (len > 0) { | |
1146 char* s = sym->as_utf8(); | |
1147 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
1148 writer()->write_objectID(sym); | |
1149 writer()->write_raw(s, len); | |
1150 } | |
1151 } | |
1152 | |
1153 | |
1154 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
1155 | |
1156 class JNILocalsDumper : public OopClosure { | |
1157 private: | |
1158 DumpWriter* _writer; | |
1159 u4 _thread_serial_num; | |
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1160 int _frame_num; |
0 | 1161 DumpWriter* writer() const { return _writer; } |
1162 public: | |
1163 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
1164 _writer = writer; | |
1165 _thread_serial_num = thread_serial_num; | |
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1166 _frame_num = -1; // default - empty stack |
0 | 1167 } |
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1168 void set_frame_number(int n) { _frame_num = n; } |
0 | 1169 void do_oop(oop* obj_p); |
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1170 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1171 }; |
1172 | |
1173 | |
1174 void JNILocalsDumper::do_oop(oop* obj_p) { | |
1175 // ignore null or deleted handles | |
1176 oop o = *obj_p; | |
1177 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
1178 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
1179 writer()->write_objectID(o); | |
1180 writer()->write_u4(_thread_serial_num); | |
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1181 writer()->write_u4((u4)_frame_num); |
0 | 1182 } |
1183 } | |
1184 | |
1185 | |
1186 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
1187 | |
1188 class JNIGlobalsDumper : public OopClosure { | |
1189 private: | |
1190 DumpWriter* _writer; | |
1191 DumpWriter* writer() const { return _writer; } | |
1192 | |
1193 public: | |
1194 JNIGlobalsDumper(DumpWriter* writer) { | |
1195 _writer = writer; | |
1196 } | |
1197 void do_oop(oop* obj_p); | |
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1198 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1199 }; |
1200 | |
1201 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
1202 oop o = *obj_p; | |
1203 | |
1204 // ignore these | |
1205 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
1206 | |
1207 // we ignore global ref to symbols and other internal objects | |
1208 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
1209 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
1210 writer()->write_objectID(o); | |
1211 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
1212 } | |
1213 }; | |
1214 | |
1215 | |
1216 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
1217 | |
1218 class MonitorUsedDumper : public OopClosure { | |
1219 private: | |
1220 DumpWriter* _writer; | |
1221 DumpWriter* writer() const { return _writer; } | |
1222 public: | |
1223 MonitorUsedDumper(DumpWriter* writer) { | |
1224 _writer = writer; | |
1225 } | |
1226 void do_oop(oop* obj_p) { | |
1227 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
1228 writer()->write_objectID(*obj_p); | |
1229 } | |
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1230 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1231 }; |
1232 | |
1233 | |
1234 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
1235 | |
1236 class StickyClassDumper : public OopClosure { | |
1237 private: | |
1238 DumpWriter* _writer; | |
1239 DumpWriter* writer() const { return _writer; } | |
1240 public: | |
1241 StickyClassDumper(DumpWriter* writer) { | |
1242 _writer = writer; | |
1243 } | |
1244 void do_oop(oop* obj_p); | |
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1245 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1246 }; |
1247 | |
1248 void StickyClassDumper::do_oop(oop* obj_p) { | |
1249 if (*obj_p != NULL) { | |
1250 oop o = *obj_p; | |
1251 if (o->is_klass()) { | |
1252 klassOop k = klassOop(o); | |
1253 if (Klass::cast(k)->oop_is_instance()) { | |
1254 instanceKlass* ik = instanceKlass::cast(k); | |
1255 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); | |
1256 writer()->write_classID(ik); | |
1257 } | |
1258 } | |
1259 } | |
1260 } | |
1261 | |
1262 | |
1263 class VM_HeapDumper; | |
1264 | |
1265 // Support class using when iterating over the heap. | |
1266 | |
1267 class HeapObjectDumper : public ObjectClosure { | |
1268 private: | |
1269 VM_HeapDumper* _dumper; | |
1270 DumpWriter* _writer; | |
1271 | |
1272 VM_HeapDumper* dumper() { return _dumper; } | |
1273 DumpWriter* writer() { return _writer; } | |
1274 | |
1275 // used to indicate that a record has been writen | |
1276 void mark_end_of_record(); | |
1277 | |
1278 public: | |
1279 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
1280 _dumper = dumper; | |
1281 _writer = writer; | |
1282 } | |
1283 | |
1284 // called for each object in the heap | |
1285 void do_object(oop o); | |
1286 }; | |
1287 | |
1288 void HeapObjectDumper::do_object(oop o) { | |
1289 // hide the sentinel for deleted handles | |
1290 if (o == JNIHandles::deleted_handle()) return; | |
1291 | |
1292 // ignore KlassKlass objects | |
1293 if (o->is_klass()) return; | |
1294 | |
1295 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
1142 | 1296 if (o->klass() == SystemDictionary::Class_klass()) { |
0 | 1297 if (!java_lang_Class::is_primitive(o)) { |
1298 return; | |
1299 } | |
1300 } | |
1301 | |
1302 // create a HPROF_GC_INSTANCE record for each object | |
1303 if (o->is_instance()) { | |
1304 DumperSupport::dump_instance(writer(), o); | |
1305 mark_end_of_record(); | |
1306 } else { | |
1307 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
1308 if (o->is_objArray()) { | |
1309 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
1310 mark_end_of_record(); | |
1311 } else { | |
1312 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
1313 if (o->is_typeArray()) { | |
1314 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
1315 mark_end_of_record(); | |
1316 } | |
1317 } | |
1318 } | |
1319 } | |
1320 | |
1321 // The VM operation that performs the heap dump | |
1322 class VM_HeapDumper : public VM_GC_Operation { | |
1323 private: | |
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1324 static VM_HeapDumper* _global_dumper; |
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1325 static DumpWriter* _global_writer; |
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1326 DumpWriter* _local_writer; |
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1327 JavaThread* _oome_thread; |
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1328 methodOop _oome_constructor; |
0 | 1329 bool _gc_before_heap_dump; |
1330 bool _is_segmented_dump; | |
1331 jlong _dump_start; | |
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1332 GrowableArray<Klass*>* _klass_map; |
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1333 ThreadStackTrace** _stack_traces; |
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1334 int _num_threads; |
0 | 1335 |
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1336 // accessors and setters |
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1337 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1338 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1339 void set_global_dumper() { |
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1340 assert(_global_dumper == NULL, "Error"); |
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1341 _global_dumper = this; |
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1342 } |
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1343 void set_global_writer() { |
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1344 assert(_global_writer == NULL, "Error"); |
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1345 _global_writer = _local_writer; |
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1346 } |
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1347 void clear_global_dumper() { _global_dumper = NULL; } |
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1348 void clear_global_writer() { _global_writer = NULL; } |
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1349 |
0 | 1350 bool is_segmented_dump() const { return _is_segmented_dump; } |
1351 void set_segmented_dump() { _is_segmented_dump = true; } | |
1352 jlong dump_start() const { return _dump_start; } | |
1353 void set_dump_start(jlong pos); | |
1354 | |
1355 bool skip_operation() const; | |
1356 | |
1357 // writes a HPROF_LOAD_CLASS record | |
1358 static void do_load_class(klassOop k); | |
1359 | |
1360 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
1361 // (and each array class too) | |
1362 static void do_class_dump(klassOop k); | |
1363 | |
1364 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1365 // array (and each multi-dimensional array too) | |
1366 static void do_basic_type_array_class_dump(klassOop k); | |
1367 | |
1368 // HPROF_GC_ROOT_THREAD_OBJ records | |
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1369 int do_thread(JavaThread* thread, u4 thread_serial_num); |
0 | 1370 void do_threads(); |
1371 | |
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1372 void add_class_serial_number(Klass* k, int serial_num) { |
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1373 _klass_map->at_put_grow(serial_num, k); |
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1374 } |
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1375 |
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1376 // HPROF_TRACE and HPROF_FRAME records |
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1377 void dump_stack_traces(); |
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1378 |
0 | 1379 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
1380 void write_dump_header(); | |
1381 | |
1382 // fixes up the length of the current dump record | |
1383 void write_current_dump_record_length(); | |
1384 | |
1385 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1386 // record in the case of a segmented heap dump) | |
1387 void end_of_dump(); | |
1388 | |
1389 public: | |
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1390 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : |
0 | 1391 VM_GC_Operation(0 /* total collections, dummy, ignored */, |
1392 0 /* total full collections, dummy, ignored */, | |
1393 gc_before_heap_dump) { | |
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1394 _local_writer = writer; |
0 | 1395 _gc_before_heap_dump = gc_before_heap_dump; |
1396 _is_segmented_dump = false; | |
1397 _dump_start = (jlong)-1; | |
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1398 _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1399 _stack_traces = NULL; |
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1400 _num_threads = 0; |
1775
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1401 if (oome) { |
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1402 assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); |
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1403 // get OutOfMemoryError zero-parameter constructor |
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1404 instanceKlass* oome_ik = instanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); |
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1405 _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), |
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1406 vmSymbols::void_method_signature()); |
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1407 // get thread throwing OOME when generating the heap dump at OOME |
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1408 _oome_thread = JavaThread::current(); |
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1409 } else { |
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1410 _oome_thread = NULL; |
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1411 _oome_constructor = NULL; |
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1412 } |
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1413 } |
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1414 ~VM_HeapDumper() { |
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1415 if (_stack_traces != NULL) { |
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1416 for (int i=0; i < _num_threads; i++) { |
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1417 delete _stack_traces[i]; |
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1418 } |
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1419 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces); |
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1420 } |
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1421 delete _klass_map; |
0 | 1422 } |
1423 | |
1424 VMOp_Type type() const { return VMOp_HeapDumper; } | |
1425 // used to mark sub-record boundary | |
1426 void check_segment_length(); | |
1427 void doit(); | |
1428 }; | |
1429 | |
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1430 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1431 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1432 |
0 | 1433 bool VM_HeapDumper::skip_operation() const { |
1434 return false; | |
1435 } | |
1436 | |
1437 // sets the dump starting position | |
1438 void VM_HeapDumper::set_dump_start(jlong pos) { | |
1439 _dump_start = pos; | |
1440 } | |
1441 | |
1442 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
1443 void VM_HeapDumper::write_dump_header() { | |
1444 if (writer()->is_open()) { | |
1445 if (is_segmented_dump()) { | |
1446 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
1447 } else { | |
1448 writer()->write_u1(HPROF_HEAP_DUMP); | |
1449 } | |
1450 writer()->write_u4(0); // current ticks | |
1451 | |
1452 // record the starting position for the dump (its length will be fixed up later) | |
1453 set_dump_start(writer()->current_offset()); | |
1454 writer()->write_u4(0); | |
1455 } | |
1456 } | |
1457 | |
1458 // fixes up the length of the current dump record | |
1459 void VM_HeapDumper::write_current_dump_record_length() { | |
1460 if (writer()->is_open()) { | |
1461 assert(dump_start() >= 0, "no dump start recorded"); | |
1462 | |
1463 // calculate the size of the dump record | |
1464 jlong dump_end = writer()->current_offset(); | |
1465 jlong dump_len = (dump_end - dump_start() - 4); | |
1466 | |
1467 // record length must fit in a u4 | |
1468 if (dump_len > (jlong)(4L*(jlong)G)) { | |
1469 warning("record is too large"); | |
1470 } | |
1471 | |
1472 // seek to the dump start and fix-up the length | |
1473 writer()->seek_to_offset(dump_start()); | |
1474 writer()->write_u4((u4)dump_len); | |
1475 | |
1476 // adjust the total size written to keep the bytes written correct. | |
1477 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
1478 | |
1479 // seek to dump end so we can continue | |
1480 writer()->seek_to_offset(dump_end); | |
1481 | |
1482 // no current dump record | |
1483 set_dump_start((jlong)-1); | |
1484 } | |
1485 } | |
1486 | |
1487 // used on a sub-record boundary to check if we need to start a | |
1488 // new segment. | |
1489 void VM_HeapDumper::check_segment_length() { | |
1490 if (writer()->is_open()) { | |
1491 if (is_segmented_dump()) { | |
1492 // don't use current_offset that would be too expensive on a per record basis | |
1493 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
1494 assert(dump_end == writer()->current_offset(), "checking"); | |
1495 jlong dump_len = (dump_end - dump_start() - 4); | |
1496 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
1497 | |
1498 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
1499 write_current_dump_record_length(); | |
1500 write_dump_header(); | |
1501 } | |
1502 } | |
1503 } | |
1504 } | |
1505 | |
1506 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1507 // record in the case of a segmented heap dump) | |
1508 void VM_HeapDumper::end_of_dump() { | |
1509 if (writer()->is_open()) { | |
1510 write_current_dump_record_length(); | |
1511 | |
1512 // for segmented dump we write the end record | |
1513 if (is_segmented_dump()) { | |
1514 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
1515 writer()->write_u4(0); | |
1516 writer()->write_u4(0); | |
1517 } | |
1518 } | |
1519 } | |
1520 | |
1521 // marks sub-record boundary | |
1522 void HeapObjectDumper::mark_end_of_record() { | |
1523 dumper()->check_segment_length(); | |
1524 } | |
1525 | |
1526 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
1527 // array classes) | |
1528 void VM_HeapDumper::do_load_class(klassOop k) { | |
1529 static u4 class_serial_num = 0; | |
1530 | |
1531 // len of HPROF_LOAD_CLASS record | |
1532 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
1533 | |
1534 // write a HPROF_LOAD_CLASS for the class and each array class | |
1535 do { | |
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1536 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
0 | 1537 |
1538 // class serial number is just a number | |
615
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1539 writer()->write_u4(++class_serial_num); |
0 | 1540 |
1541 // class ID | |
1542 Klass* klass = Klass::cast(k); | |
615
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1543 writer()->write_classID(klass); |
0 | 1544 |
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1545 // add the klassOop and class serial number pair |
615
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1546 dumper()->add_class_serial_number(klass, class_serial_num); |
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1547 |
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1548 writer()->write_u4(STACK_TRACE_ID); |
0 | 1549 |
1550 // class name ID | |
1551 symbolOop name = klass->name(); | |
615
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1552 writer()->write_objectID(name); |
0 | 1553 |
1554 // write a LOAD_CLASS record for the array type (if it exists) | |
1555 k = klass->array_klass_or_null(); | |
1556 } while (k != NULL); | |
1557 } | |
1558 | |
1559 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
1560 void VM_HeapDumper::do_class_dump(klassOop k) { | |
615
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1561 DumperSupport::dump_class_and_array_classes(writer(), k); |
0 | 1562 } |
1563 | |
1564 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1565 // array (and each multi-dimensional array too) | |
1566 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { | |
615
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1567 DumperSupport::dump_basic_type_array_class(writer(), k); |
0 | 1568 } |
1569 | |
1570 // Walk the stack of the given thread. | |
1571 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
1572 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
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1573 // |
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1574 // It returns the number of Java frames in this thread stack |
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1575 int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
0 | 1576 JNILocalsDumper blk(writer(), thread_serial_num); |
1577 | |
1578 oop threadObj = java_thread->threadObj(); | |
1579 assert(threadObj != NULL, "sanity check"); | |
1580 | |
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1581 int stack_depth = 0; |
0 | 1582 if (java_thread->has_last_Java_frame()) { |
1583 | |
1584 // vframes are resource allocated | |
1585 Thread* current_thread = Thread::current(); | |
1586 ResourceMark rm(current_thread); | |
1587 HandleMark hm(current_thread); | |
1588 | |
1589 RegisterMap reg_map(java_thread); | |
1590 frame f = java_thread->last_frame(); | |
1591 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
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1592 frame* last_entry_frame = NULL; |
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1593 int extra_frames = 0; |
0 | 1594 |
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1595 if (java_thread == _oome_thread && _oome_constructor != NULL) { |
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1596 extra_frames++; |
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1597 } |
0 | 1598 while (vf != NULL) { |
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1599 blk.set_frame_number(stack_depth); |
0 | 1600 if (vf->is_java_frame()) { |
1601 | |
1602 // java frame (interpreted, compiled, ...) | |
1603 javaVFrame *jvf = javaVFrame::cast(vf); | |
1604 if (!(jvf->method()->is_native())) { | |
1605 StackValueCollection* locals = jvf->locals(); | |
1606 for (int slot=0; slot<locals->size(); slot++) { | |
1607 if (locals->at(slot)->type() == T_OBJECT) { | |
1608 oop o = locals->obj_at(slot)(); | |
1609 | |
1610 if (o != NULL) { | |
1611 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
1612 writer()->write_objectID(o); | |
1613 writer()->write_u4(thread_serial_num); | |
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1614 writer()->write_u4((u4) (stack_depth + extra_frames)); |
0 | 1615 } |
1616 } | |
1617 } | |
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1618 } else { |
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1619 // native frame |
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1620 if (stack_depth == 0) { |
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1621 // JNI locals for the top frame. |
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1622 java_thread->active_handles()->oops_do(&blk); |
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1623 } else { |
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1624 if (last_entry_frame != NULL) { |
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1625 // JNI locals for the entry frame |
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1626 assert(last_entry_frame->is_entry_frame(), "checking"); |
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1627 last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
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1628 } |
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1629 } |
0 | 1630 } |
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1631 // increment only for Java frames |
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1632 stack_depth++; |
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1633 last_entry_frame = NULL; |
0 | 1634 |
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1635 } else { |
0 | 1636 // externalVFrame - if it's an entry frame then report any JNI locals |
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1637 // as roots when we find the corresponding native javaVFrame |
0 | 1638 frame* fr = vf->frame_pointer(); |
1639 assert(fr != NULL, "sanity check"); | |
1640 if (fr->is_entry_frame()) { | |
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1641 last_entry_frame = fr; |
0 | 1642 } |
1643 } | |
1644 vf = vf->sender(); | |
1645 } | |
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1646 } else { |
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1647 // no last java frame but there may be JNI locals |
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1648 java_thread->active_handles()->oops_do(&blk); |
0 | 1649 } |
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1650 return stack_depth; |
0 | 1651 } |
1652 | |
1653 | |
1654 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
1655 // the stack so that locals and JNI locals are dumped. | |
1656 void VM_HeapDumper::do_threads() { | |
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1657 for (int i=0; i < _num_threads; i++) { |
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1658 JavaThread* thread = _stack_traces[i]->thread(); |
0 | 1659 oop threadObj = thread->threadObj(); |
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1660 u4 thread_serial_num = i+1; |
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1661 u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
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1662 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
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1663 writer()->write_objectID(threadObj); |
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1664 writer()->write_u4(thread_serial_num); // thread number |
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1665 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1666 int num_frames = do_thread(thread, thread_serial_num); |
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1667 assert(num_frames == _stack_traces[i]->get_stack_depth(), |
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1668 "total number of Java frames not matched"); |
0 | 1669 } |
1670 } | |
1671 | |
1672 | |
1673 // The VM operation that dumps the heap. The dump consists of the following | |
1674 // records: | |
1675 // | |
1676 // HPROF_HEADER | |
1677 // [HPROF_UTF8]* | |
1678 // [HPROF_LOAD_CLASS]* | |
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1679 // [[HPROF_FRAME]*|HPROF_TRACE]* |
0 | 1680 // [HPROF_GC_CLASS_DUMP]* |
1681 // HPROF_HEAP_DUMP | |
1682 // | |
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1683 // The HPROF_TRACE records represent the stack traces where the heap dump |
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1684 // is generated and a "dummy trace" record which does not include |
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1685 // any frames. The dummy trace record is used to be referenced as the |
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1686 // unknown object alloc site. |
0 | 1687 // |
1688 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
1689 // the heap dump be generated in a single pass we remember the position of | |
1690 // the dump length and fix it up after all sub-records have been written. | |
1691 // To generate the sub-records we iterate over the heap, writing | |
1692 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
1693 // records as we go. Once that is done we write records for some of the GC | |
1694 // roots. | |
1695 | |
1696 void VM_HeapDumper::doit() { | |
1697 | |
1698 HandleMark hm; | |
1699 CollectedHeap* ch = Universe::heap(); | |
1700 if (_gc_before_heap_dump) { | |
1701 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
1702 } else { | |
1703 // make the heap parsable (no need to retire TLABs) | |
1704 ch->ensure_parsability(false); | |
1705 } | |
1706 | |
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1707 // At this point we should be the only dumper active, so |
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1708 // the following should be safe. |
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1709 set_global_dumper(); |
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1710 set_global_writer(); |
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1711 |
0 | 1712 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
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1713 size_t used = ch->used(); |
0 | 1714 const char* header; |
1715 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
1716 set_segmented_dump(); | |
1717 header = "JAVA PROFILE 1.0.2"; | |
1718 } else { | |
1719 header = "JAVA PROFILE 1.0.1"; | |
1720 } | |
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1721 |
0 | 1722 // header is few bytes long - no chance to overflow int |
1723 writer()->write_raw((void*)header, (int)strlen(header)); | |
1724 writer()->write_u1(0); // terminator | |
1725 writer()->write_u4(oopSize); | |
1726 writer()->write_u8(os::javaTimeMillis()); | |
1727 | |
1728 // HPROF_UTF8 records | |
1729 SymbolTableDumper sym_dumper(writer()); | |
1730 SymbolTable::oops_do(&sym_dumper); | |
1731 | |
1732 // write HPROF_LOAD_CLASS records | |
1733 SystemDictionary::classes_do(&do_load_class); | |
1734 Universe::basic_type_classes_do(&do_load_class); | |
1735 | |
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1736 // write HPROF_FRAME and HPROF_TRACE records |
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1737 // this must be called after _klass_map is built when iterating the classes above. |
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1738 dump_stack_traces(); |
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1739 |
0 | 1740 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
1741 write_dump_header(); | |
1742 | |
1743 // Writes HPROF_GC_CLASS_DUMP records | |
1744 SystemDictionary::classes_do(&do_class_dump); | |
1745 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); | |
1746 check_segment_length(); | |
1747 | |
1748 // writes HPROF_GC_INSTANCE_DUMP records. | |
1749 // After each sub-record is written check_segment_length will be invoked. When | |
1750 // generated a segmented heap dump this allows us to check if the current | |
1751 // segment exceeds a threshold and if so, then a new segment is started. | |
1752 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
1753 // of the heap dump. | |
1754 HeapObjectDumper obj_dumper(this, writer()); | |
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1755 Universe::heap()->safe_object_iterate(&obj_dumper); |
0 | 1756 |
1757 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
1758 do_threads(); | |
1759 check_segment_length(); | |
1760 | |
1761 // HPROF_GC_ROOT_MONITOR_USED | |
1762 MonitorUsedDumper mon_dumper(writer()); | |
1763 ObjectSynchronizer::oops_do(&mon_dumper); | |
1764 check_segment_length(); | |
1765 | |
1766 // HPROF_GC_ROOT_JNI_GLOBAL | |
1767 JNIGlobalsDumper jni_dumper(writer()); | |
1768 JNIHandles::oops_do(&jni_dumper); | |
1769 check_segment_length(); | |
1770 | |
1771 // HPROF_GC_ROOT_STICKY_CLASS | |
1772 StickyClassDumper class_dumper(writer()); | |
1773 SystemDictionary::always_strong_oops_do(&class_dumper); | |
1774 | |
1775 // fixes up the length of the dump record. In the case of a segmented | |
1776 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
1777 end_of_dump(); | |
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1778 |
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1779 // Now we clear the global variables, so that a future dumper might run. |
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1780 clear_global_dumper(); |
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1781 clear_global_writer(); |
0 | 1782 } |
1783 | |
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1784 void VM_HeapDumper::dump_stack_traces() { |
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1785 // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
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1786 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
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1787 writer()->write_u4((u4) STACK_TRACE_ID); |
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1788 writer()->write_u4(0); // thread number |
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1789 writer()->write_u4(0); // frame count |
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1790 |
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1791 _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads()); |
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1792 int frame_serial_num = 0; |
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1793 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
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1794 oop threadObj = thread->threadObj(); |
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1795 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
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1796 // dump thread stack trace |
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1797 ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
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1798 stack_trace->dump_stack_at_safepoint(-1); |
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1799 _stack_traces[_num_threads++] = stack_trace; |
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1800 |
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1801 // write HPROF_FRAME records for this thread's stack trace |
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1802 int depth = stack_trace->get_stack_depth(); |
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1803 int thread_frame_start = frame_serial_num; |
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1804 int extra_frames = 0; |
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1805 // write fake frame that makes it look like the thread, which caused OOME, |
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1806 // is in the OutOfMemoryError zero-parameter constructor |
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1807 if (thread == _oome_thread && _oome_constructor != NULL) { |
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1808 int oome_serial_num = _klass_map->find(Klass::cast(_oome_constructor->method_holder())); |
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1809 // the class serial number starts from 1 |
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1810 assert(oome_serial_num > 0, "OutOfMemoryError class not found"); |
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1811 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, oome_serial_num, |
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1812 _oome_constructor, 0); |
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1813 extra_frames++; |
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1814 } |
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1815 for (int j=0; j < depth; j++) { |
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1816 StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
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1817 methodOop m = frame->method(); |
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1818 int class_serial_num = _klass_map->find(Klass::cast(m->method_holder())); |
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1819 // the class serial number starts from 1 |
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1820 assert(class_serial_num > 0, "class not found"); |
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1821 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
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1822 } |
1775
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1823 depth += extra_frames; |
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1824 |
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1825 // write HPROF_TRACE record for one thread |
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1826 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
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1827 int stack_serial_num = _num_threads + STACK_TRACE_ID; |
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1828 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1829 writer()->write_u4((u4) _num_threads); // thread serial number |
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1830 writer()->write_u4(depth); // frame count |
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1831 for (int j=1; j <= depth; j++) { |
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1832 writer()->write_id(thread_frame_start + j); |
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1833 } |
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1834 } |
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1835 } |
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1836 } |
0 | 1837 |
1838 // dump the heap to given path. | |
1839 int HeapDumper::dump(const char* path) { | |
1840 assert(path != NULL && strlen(path) > 0, "path missing"); | |
1841 | |
1842 // print message in interactive case | |
1843 if (print_to_tty()) { | |
1844 tty->print_cr("Dumping heap to %s ...", path); | |
1845 timer()->start(); | |
1846 } | |
1847 | |
1848 // create the dump writer. If the file can be opened then bail | |
1849 DumpWriter writer(path); | |
1850 if (!writer.is_open()) { | |
1851 set_error(writer.error()); | |
1852 if (print_to_tty()) { | |
1853 tty->print_cr("Unable to create %s: %s", path, | |
1854 (error() != NULL) ? error() : "reason unknown"); | |
1855 } | |
1856 return -1; | |
1857 } | |
1858 | |
1859 // generate the dump | |
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1860 VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); |
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1861 if (Thread::current()->is_VM_thread()) { |
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1862 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1863 dumper.doit(); |
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1864 } else { |
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1865 VMThread::execute(&dumper); |
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1866 } |
0 | 1867 |
1868 // close dump file and record any error that the writer may have encountered | |
1869 writer.close(); | |
1870 set_error(writer.error()); | |
1871 | |
1872 // print message in interactive case | |
1873 if (print_to_tty()) { | |
1874 timer()->stop(); | |
1875 if (error() == NULL) { | |
1876 char msg[256]; | |
1877 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
1878 os::jlong_format_specifier(), timer()->seconds()); | |
1879 tty->print_cr(msg, writer.bytes_written()); | |
1880 } else { | |
1881 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
1882 } | |
1883 } | |
1884 | |
1885 return (writer.error() == NULL) ? 0 : -1; | |
1886 } | |
1887 | |
1888 // stop timer (if still active), and free any error string we might be holding | |
1889 HeapDumper::~HeapDumper() { | |
1890 if (timer()->is_active()) { | |
1891 timer()->stop(); | |
1892 } | |
1893 set_error(NULL); | |
1894 } | |
1895 | |
1896 | |
1897 // returns the error string (resource allocated), or NULL | |
1898 char* HeapDumper::error_as_C_string() const { | |
1899 if (error() != NULL) { | |
1900 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
1901 strcpy(str, error()); | |
1902 return str; | |
1903 } else { | |
1904 return NULL; | |
1905 } | |
1906 } | |
1907 | |
1908 // set the error string | |
1909 void HeapDumper::set_error(char* error) { | |
1910 if (_error != NULL) { | |
1911 os::free(_error); | |
1912 } | |
1913 if (error == NULL) { | |
1914 _error = NULL; | |
1915 } else { | |
1916 _error = os::strdup(error); | |
1917 assert(_error != NULL, "allocation failure"); | |
1918 } | |
1919 } | |
1920 | |
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1921 // Called by out-of-memory error reporting by a single Java thread |
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1922 // outside of a JVM safepoint |
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1923 void HeapDumper::dump_heap_from_oome() { |
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1924 HeapDumper::dump_heap(true); |
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1925 } |
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1926 |
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1927 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1928 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1929 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1930 // general use, however, this method will need modification to prevent |
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1931 // inteference when updating the static variables base_path and dump_file_seq below. |
0 | 1932 void HeapDumper::dump_heap() { |
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1933 HeapDumper::dump_heap(false); |
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1934 } |
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1935 |
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1936 void HeapDumper::dump_heap(bool oome) { |
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1937 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1938 static uint dump_file_seq = 0; |
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1939 char* my_path; |
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1940 const int max_digit_chars = 20; |
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1941 |
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1942 const char* dump_file_name = "java_pid"; |
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1943 const char* dump_file_ext = ".hprof"; |
0 | 1944 |
1945 // The dump file defaults to java_pid<pid>.hprof in the current working | |
1946 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
1947 // dump file name or a directory where dump file is created. | |
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1948 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1949 // Calculate potentially longest base path and check if we have enough |
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1950 // allocated statically. |
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1951 const size_t total_length = |
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1952 (HeapDumpPath == NULL ? 0 : strlen(HeapDumpPath)) + |
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1953 strlen(os::file_separator()) + max_digit_chars + |
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1954 strlen(dump_file_name) + strlen(dump_file_ext) + 1; |
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1955 if (total_length > sizeof(base_path)) { |
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1956 warning("Cannot create heap dump file. HeapDumpPath is too long."); |
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1957 return; |
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1958 } |
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1959 |
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1960 bool use_default_filename = true; |
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1961 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1962 // HeapDumpPath=<file> not specified |
0 | 1963 } else { |
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1964 strncpy(base_path, HeapDumpPath, sizeof(base_path)); |
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1965 // check if the path is a directory (must exist) |
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1966 DIR* dir = os::opendir(base_path); |
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1967 if (dir == NULL) { |
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1968 use_default_filename = false; |
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1969 } else { |
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1970 // HeapDumpPath specified a directory. We append a file separator |
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1971 // (if needed). |
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1972 os::closedir(dir); |
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1973 size_t fs_len = strlen(os::file_separator()); |
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1974 if (strlen(base_path) >= fs_len) { |
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1975 char* end = base_path; |
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1976 end += (strlen(base_path) - fs_len); |
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1977 if (strcmp(end, os::file_separator()) != 0) { |
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1978 strcat(base_path, os::file_separator()); |
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1979 } |
0 | 1980 } |
1981 } | |
1982 } | |
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1983 // If HeapDumpPath wasn't a file name then we append the default name |
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1984 if (use_default_filename) { |
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1985 const size_t dlen = strlen(base_path); // if heap dump dir specified |
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1986 jio_snprintf(&base_path[dlen], sizeof(base_path)-dlen, "%s%d%s", |
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1987 dump_file_name, os::current_process_id(), dump_file_ext); |
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1988 } |
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1989 const size_t len = strlen(base_path) + 1; |
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1990 my_path = (char*)os::malloc(len); |
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1991 if (my_path == NULL) { |
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1992 warning("Cannot create heap dump file. Out of system memory."); |
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1993 return; |
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1994 } |
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1995 strncpy(my_path, base_path, len); |
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1996 } else { |
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1997 // Append a sequence number id for dumps following the first |
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1998 const size_t len = strlen(base_path) + max_digit_chars + 2; // for '.' and \0 |
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1999 my_path = (char*)os::malloc(len); |
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2000 if (my_path == NULL) { |
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2001 warning("Cannot create heap dump file. Out of system memory."); |
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2002 return; |
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2003 } |
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2004 jio_snprintf(my_path, len, "%s.%d", base_path, dump_file_seq); |
0 | 2005 } |
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2006 dump_file_seq++; // increment seq number for next time we dump |
0 | 2007 |
2008 HeapDumper dumper(false /* no GC before heap dump */, | |
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2009 true /* send to tty */, |
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2010 oome /* pass along out-of-memory-error flag */); |
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2011 dumper.dump(my_path); |
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2012 os::free(my_path); |
0 | 2013 } |