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annotate src/share/vm/services/heapDumper.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
author | trims |
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date | Thu, 27 May 2010 19:08:38 -0700 |
parents | 4ce7240d622c |
children | 30f67acf635d |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2009, 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 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_heapDumper.cpp.incl" | |
27 | |
28 /* | |
29 * HPROF binary format - description copied from: | |
30 * src/share/demo/jvmti/hprof/hprof_io.c | |
31 * | |
32 * | |
33 * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" | |
34 * (0-terminated) | |
35 * | |
36 * u4 size of identifiers. Identifiers are used to represent | |
37 * UTF8 strings, objects, stack traces, etc. They usually | |
38 * have the same size as host pointers. For example, on | |
39 * Solaris and Win32, the size is 4. | |
40 * u4 high word | |
41 * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 | |
42 * [record]* a sequence of records. | |
43 * | |
44 * | |
45 * Record format: | |
46 * | |
47 * u1 a TAG denoting the type of the record | |
48 * u4 number of *microseconds* since the time stamp in the | |
49 * header. (wraps around in a little more than an hour) | |
50 * u4 number of bytes *remaining* in the record. Note that | |
51 * this number excludes the tag and the length field itself. | |
52 * [u1]* BODY of the record (a sequence of bytes) | |
53 * | |
54 * | |
55 * The following TAGs are supported: | |
56 * | |
57 * TAG BODY notes | |
58 *---------------------------------------------------------- | |
59 * HPROF_UTF8 a UTF8-encoded name | |
60 * | |
61 * id name ID | |
62 * [u1]* UTF8 characters (no trailing zero) | |
63 * | |
64 * HPROF_LOAD_CLASS a newly loaded class | |
65 * | |
66 * u4 class serial number (> 0) | |
67 * id class object ID | |
68 * u4 stack trace serial number | |
69 * id class name ID | |
70 * | |
71 * HPROF_UNLOAD_CLASS an unloading class | |
72 * | |
73 * u4 class serial_number | |
74 * | |
75 * HPROF_FRAME a Java stack frame | |
76 * | |
77 * id stack frame ID | |
78 * id method name ID | |
79 * id method signature ID | |
80 * id source file name ID | |
81 * u4 class serial number | |
82 * i4 line number. >0: normal | |
83 * -1: unknown | |
84 * -2: compiled method | |
85 * -3: native method | |
86 * | |
87 * HPROF_TRACE a Java stack trace | |
88 * | |
89 * u4 stack trace serial number | |
90 * u4 thread serial number | |
91 * u4 number of frames | |
92 * [id]* stack frame IDs | |
93 * | |
94 * | |
95 * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC | |
96 * | |
97 * u2 flags 0x0001: incremental vs. complete | |
98 * 0x0002: sorted by allocation vs. live | |
99 * 0x0004: whether to force a GC | |
100 * u4 cutoff ratio | |
101 * u4 total live bytes | |
102 * u4 total live instances | |
103 * u8 total bytes allocated | |
104 * u8 total instances allocated | |
105 * u4 number of sites that follow | |
106 * [u1 is_array: 0: normal object | |
107 * 2: object array | |
108 * 4: boolean array | |
109 * 5: char array | |
110 * 6: float array | |
111 * 7: double array | |
112 * 8: byte array | |
113 * 9: short array | |
114 * 10: int array | |
115 * 11: long array | |
116 * u4 class serial number (may be zero during startup) | |
117 * u4 stack trace serial number | |
118 * u4 number of bytes alive | |
119 * u4 number of instances alive | |
120 * u4 number of bytes allocated | |
121 * u4]* number of instance allocated | |
122 * | |
123 * HPROF_START_THREAD a newly started thread. | |
124 * | |
125 * u4 thread serial number (> 0) | |
126 * id thread object ID | |
127 * u4 stack trace serial number | |
128 * id thread name ID | |
129 * id thread group name ID | |
130 * id thread group parent name ID | |
131 * | |
132 * HPROF_END_THREAD a terminating thread. | |
133 * | |
134 * u4 thread serial number | |
135 * | |
136 * HPROF_HEAP_SUMMARY heap summary | |
137 * | |
138 * u4 total live bytes | |
139 * u4 total live instances | |
140 * u8 total bytes allocated | |
141 * u8 total instances allocated | |
142 * | |
143 * HPROF_HEAP_DUMP denote a heap dump | |
144 * | |
145 * [heap dump sub-records]* | |
146 * | |
147 * There are four kinds of heap dump sub-records: | |
148 * | |
149 * u1 sub-record type | |
150 * | |
151 * HPROF_GC_ROOT_UNKNOWN unknown root | |
152 * | |
153 * id object ID | |
154 * | |
155 * HPROF_GC_ROOT_THREAD_OBJ thread object | |
156 * | |
157 * id thread object ID (may be 0 for a | |
158 * thread newly attached through JNI) | |
159 * u4 thread sequence number | |
160 * u4 stack trace sequence number | |
161 * | |
162 * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root | |
163 * | |
164 * id object ID | |
165 * id JNI global ref ID | |
166 * | |
167 * HPROF_GC_ROOT_JNI_LOCAL JNI local ref | |
168 * | |
169 * id object ID | |
170 * u4 thread serial number | |
171 * u4 frame # in stack trace (-1 for empty) | |
172 * | |
173 * HPROF_GC_ROOT_JAVA_FRAME Java stack frame | |
174 * | |
175 * id object ID | |
176 * u4 thread serial number | |
177 * u4 frame # in stack trace (-1 for empty) | |
178 * | |
179 * HPROF_GC_ROOT_NATIVE_STACK Native stack | |
180 * | |
181 * id object ID | |
182 * u4 thread serial number | |
183 * | |
184 * HPROF_GC_ROOT_STICKY_CLASS System class | |
185 * | |
186 * id object ID | |
187 * | |
188 * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block | |
189 * | |
190 * id object ID | |
191 * u4 thread serial number | |
192 * | |
193 * HPROF_GC_ROOT_MONITOR_USED Busy monitor | |
194 * | |
195 * id object ID | |
196 * | |
197 * HPROF_GC_CLASS_DUMP dump of a class object | |
198 * | |
199 * id class object ID | |
200 * u4 stack trace serial number | |
201 * id super class object ID | |
202 * id class loader object ID | |
203 * id signers object ID | |
204 * id protection domain object ID | |
205 * id reserved | |
206 * id reserved | |
207 * | |
208 * u4 instance size (in bytes) | |
209 * | |
210 * u2 size of constant pool | |
211 * [u2, constant pool index, | |
212 * ty, type | |
213 * 2: object | |
214 * 4: boolean | |
215 * 5: char | |
216 * 6: float | |
217 * 7: double | |
218 * 8: byte | |
219 * 9: short | |
220 * 10: int | |
221 * 11: long | |
222 * vl]* and value | |
223 * | |
224 * u2 number of static fields | |
225 * [id, static field name, | |
226 * ty, type, | |
227 * vl]* and value | |
228 * | |
229 * u2 number of inst. fields (not inc. super) | |
230 * [id, instance field name, | |
231 * ty]* type | |
232 * | |
233 * HPROF_GC_INSTANCE_DUMP dump of a normal object | |
234 * | |
235 * id object ID | |
236 * u4 stack trace serial number | |
237 * id class object ID | |
238 * u4 number of bytes that follow | |
239 * [vl]* instance field values (class, followed | |
240 * by super, super's super ...) | |
241 * | |
242 * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array | |
243 * | |
244 * id array object ID | |
245 * u4 stack trace serial number | |
246 * u4 number of elements | |
247 * id array class ID | |
248 * [id]* elements | |
249 * | |
250 * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array | |
251 * | |
252 * id array object ID | |
253 * u4 stack trace serial number | |
254 * u4 number of elements | |
255 * u1 element type | |
256 * 4: boolean array | |
257 * 5: char array | |
258 * 6: float array | |
259 * 7: double array | |
260 * 8: byte array | |
261 * 9: short array | |
262 * 10: int array | |
263 * 11: long array | |
264 * [u1]* elements | |
265 * | |
266 * HPROF_CPU_SAMPLES a set of sample traces of running threads | |
267 * | |
268 * u4 total number of samples | |
269 * u4 # of traces | |
270 * [u4 # of samples | |
271 * u4]* stack trace serial number | |
272 * | |
273 * HPROF_CONTROL_SETTINGS the settings of on/off switches | |
274 * | |
275 * u4 0x00000001: alloc traces on/off | |
276 * 0x00000002: cpu sampling on/off | |
277 * u2 stack trace depth | |
278 * | |
279 * | |
280 * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally | |
281 * be generated as a sequence of heap dump segments. This sequence is | |
282 * terminated by an end record. The additional tags allowed by format | |
283 * "JAVA PROFILE 1.0.2" are: | |
284 * | |
285 * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment | |
286 * | |
287 * [heap dump sub-records]* | |
288 * The same sub-record types allowed by HPROF_HEAP_DUMP | |
289 * | |
290 * HPROF_HEAP_DUMP_END denotes the end of a heap dump | |
291 * | |
292 */ | |
293 | |
294 | |
295 // HPROF tags | |
296 | |
297 typedef enum { | |
298 // top-level records | |
299 HPROF_UTF8 = 0x01, | |
300 HPROF_LOAD_CLASS = 0x02, | |
301 HPROF_UNLOAD_CLASS = 0x03, | |
302 HPROF_FRAME = 0x04, | |
303 HPROF_TRACE = 0x05, | |
304 HPROF_ALLOC_SITES = 0x06, | |
305 HPROF_HEAP_SUMMARY = 0x07, | |
306 HPROF_START_THREAD = 0x0A, | |
307 HPROF_END_THREAD = 0x0B, | |
308 HPROF_HEAP_DUMP = 0x0C, | |
309 HPROF_CPU_SAMPLES = 0x0D, | |
310 HPROF_CONTROL_SETTINGS = 0x0E, | |
311 | |
312 // 1.0.2 record types | |
313 HPROF_HEAP_DUMP_SEGMENT = 0x1C, | |
314 HPROF_HEAP_DUMP_END = 0x2C, | |
315 | |
316 // field types | |
317 HPROF_ARRAY_OBJECT = 0x01, | |
318 HPROF_NORMAL_OBJECT = 0x02, | |
319 HPROF_BOOLEAN = 0x04, | |
320 HPROF_CHAR = 0x05, | |
321 HPROF_FLOAT = 0x06, | |
322 HPROF_DOUBLE = 0x07, | |
323 HPROF_BYTE = 0x08, | |
324 HPROF_SHORT = 0x09, | |
325 HPROF_INT = 0x0A, | |
326 HPROF_LONG = 0x0B, | |
327 | |
328 // data-dump sub-records | |
329 HPROF_GC_ROOT_UNKNOWN = 0xFF, | |
330 HPROF_GC_ROOT_JNI_GLOBAL = 0x01, | |
331 HPROF_GC_ROOT_JNI_LOCAL = 0x02, | |
332 HPROF_GC_ROOT_JAVA_FRAME = 0x03, | |
333 HPROF_GC_ROOT_NATIVE_STACK = 0x04, | |
334 HPROF_GC_ROOT_STICKY_CLASS = 0x05, | |
335 HPROF_GC_ROOT_THREAD_BLOCK = 0x06, | |
336 HPROF_GC_ROOT_MONITOR_USED = 0x07, | |
337 HPROF_GC_ROOT_THREAD_OBJ = 0x08, | |
338 HPROF_GC_CLASS_DUMP = 0x20, | |
339 HPROF_GC_INSTANCE_DUMP = 0x21, | |
340 HPROF_GC_OBJ_ARRAY_DUMP = 0x22, | |
341 HPROF_GC_PRIM_ARRAY_DUMP = 0x23 | |
342 } hprofTag; | |
343 | |
344 // Default stack trace ID (used for dummy HPROF_TRACE record) | |
345 enum { | |
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346 STACK_TRACE_ID = 1, |
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347 INITIAL_CLASS_COUNT = 200 |
0 | 348 }; |
349 | |
350 // Supports I/O operations on a dump file | |
351 | |
352 class DumpWriter : public StackObj { | |
353 private: | |
354 enum { | |
355 io_buffer_size = 8*M | |
356 }; | |
357 | |
358 int _fd; // file descriptor (-1 if dump file not open) | |
359 jlong _bytes_written; // number of byte written to dump file | |
360 | |
361 char* _buffer; // internal buffer | |
362 int _size; | |
363 int _pos; | |
364 | |
365 char* _error; // error message when I/O fails | |
366 | |
367 void set_file_descriptor(int fd) { _fd = fd; } | |
368 int file_descriptor() const { return _fd; } | |
369 | |
370 char* buffer() const { return _buffer; } | |
371 int buffer_size() const { return _size; } | |
372 int position() const { return _pos; } | |
373 void set_position(int pos) { _pos = pos; } | |
374 | |
375 void set_error(const char* error) { _error = (char*)os::strdup(error); } | |
376 | |
377 // all I/O go through this function | |
378 void write_internal(void* s, int len); | |
379 | |
380 public: | |
381 DumpWriter(const char* path); | |
382 ~DumpWriter(); | |
383 | |
384 void close(); | |
385 bool is_open() const { return file_descriptor() >= 0; } | |
386 void flush(); | |
387 | |
388 // total number of bytes written to the disk | |
389 jlong bytes_written() const { return _bytes_written; } | |
390 | |
391 // adjust the number of bytes written to disk (used to keep the count | |
392 // of the number of bytes written in case of rewrites) | |
393 void adjust_bytes_written(jlong n) { _bytes_written += n; } | |
394 | |
395 // number of (buffered) bytes as yet unwritten to the dump file | |
396 jlong bytes_unwritten() const { return (jlong)position(); } | |
397 | |
398 char* error() const { return _error; } | |
399 | |
400 jlong current_offset(); | |
401 void seek_to_offset(jlong pos); | |
402 | |
403 // writer functions | |
404 void write_raw(void* s, int len); | |
405 void write_u1(u1 x) { write_raw((void*)&x, 1); } | |
406 void write_u2(u2 x); | |
407 void write_u4(u4 x); | |
408 void write_u8(u8 x); | |
409 void write_objectID(oop o); | |
410 void write_classID(Klass* k); | |
396
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411 void write_id(u4 x); |
0 | 412 }; |
413 | |
414 DumpWriter::DumpWriter(const char* path) { | |
415 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
416 // sufficient memory then reduce size until we can allocate something. | |
417 _size = io_buffer_size; | |
418 do { | |
419 _buffer = (char*)os::malloc(_size); | |
420 if (_buffer == NULL) { | |
421 _size = _size >> 1; | |
422 } | |
423 } while (_buffer == NULL && _size > 0); | |
424 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
425 _pos = 0; | |
426 _error = NULL; | |
427 _bytes_written = 0L; | |
428 _fd = os::create_binary_file(path, false); // don't replace existing file | |
429 | |
430 // if the open failed we record the error | |
431 if (_fd < 0) { | |
432 _error = (char*)os::strdup(strerror(errno)); | |
433 } | |
434 } | |
435 | |
436 DumpWriter::~DumpWriter() { | |
437 // flush and close dump file | |
438 if (file_descriptor() >= 0) { | |
439 close(); | |
440 } | |
441 if (_buffer != NULL) os::free(_buffer); | |
442 if (_error != NULL) os::free(_error); | |
443 } | |
444 | |
445 // closes dump file (if open) | |
446 void DumpWriter::close() { | |
447 // flush and close dump file | |
448 if (file_descriptor() >= 0) { | |
449 flush(); | |
450 ::close(file_descriptor()); | |
451 } | |
452 } | |
453 | |
454 // write directly to the file | |
455 void DumpWriter::write_internal(void* s, int len) { | |
456 if (is_open()) { | |
457 int n = ::write(file_descriptor(), s, len); | |
458 if (n > 0) { | |
459 _bytes_written += n; | |
460 } | |
461 if (n != len) { | |
462 if (n < 0) { | |
463 set_error(strerror(errno)); | |
464 } else { | |
465 set_error("file size limit"); | |
466 } | |
467 ::close(file_descriptor()); | |
468 set_file_descriptor(-1); | |
469 } | |
470 } | |
471 } | |
472 | |
473 // write raw bytes | |
474 void DumpWriter::write_raw(void* s, int len) { | |
475 if (is_open()) { | |
476 // flush buffer to make toom | |
477 if ((position()+ len) >= buffer_size()) { | |
478 flush(); | |
479 } | |
480 | |
481 // buffer not available or too big to buffer it | |
482 if ((buffer() == NULL) || (len >= buffer_size())) { | |
483 write_internal(s, len); | |
484 } else { | |
485 // Should optimize this for u1/u2/u4/u8 sizes. | |
486 memcpy(buffer() + position(), s, len); | |
487 set_position(position() + len); | |
488 } | |
489 } | |
490 } | |
491 | |
492 // flush any buffered bytes to the file | |
493 void DumpWriter::flush() { | |
494 if (is_open() && position() > 0) { | |
495 write_internal(buffer(), position()); | |
496 set_position(0); | |
497 } | |
498 } | |
499 | |
500 | |
501 jlong DumpWriter::current_offset() { | |
502 if (is_open()) { | |
503 // the offset is the file offset plus whatever we have buffered | |
504 jlong offset = os::current_file_offset(file_descriptor()); | |
505 assert(offset >= 0, "lseek failed"); | |
506 return offset + (jlong)position(); | |
507 } else { | |
508 return (jlong)-1; | |
509 } | |
510 } | |
511 | |
512 void DumpWriter::seek_to_offset(jlong off) { | |
513 assert(off >= 0, "bad offset"); | |
514 | |
515 // need to flush before seeking | |
516 flush(); | |
517 | |
518 // may be closed due to I/O error | |
519 if (is_open()) { | |
520 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
521 assert(n >= 0, "lseek failed"); | |
522 } | |
523 } | |
524 | |
525 void DumpWriter::write_u2(u2 x) { | |
526 u2 v; | |
527 Bytes::put_Java_u2((address)&v, x); | |
528 write_raw((void*)&v, 2); | |
529 } | |
530 | |
531 void DumpWriter::write_u4(u4 x) { | |
532 u4 v; | |
533 Bytes::put_Java_u4((address)&v, x); | |
534 write_raw((void*)&v, 4); | |
535 } | |
536 | |
537 void DumpWriter::write_u8(u8 x) { | |
538 u8 v; | |
539 Bytes::put_Java_u8((address)&v, x); | |
540 write_raw((void*)&v, 8); | |
541 } | |
542 | |
543 void DumpWriter::write_objectID(oop o) { | |
544 address a = (address)((uintptr_t)o); | |
545 #ifdef _LP64 | |
546 write_u8((u8)a); | |
547 #else | |
548 write_u4((u4)a); | |
549 #endif | |
550 } | |
551 | |
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552 void DumpWriter::write_id(u4 x) { |
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553 #ifdef _LP64 |
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554 write_u8((u8) x); |
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555 #else |
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556 write_u4(x); |
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557 #endif |
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558 } |
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559 |
0 | 560 // We use java mirror as the class ID |
561 void DumpWriter::write_classID(Klass* k) { | |
562 write_objectID(k->java_mirror()); | |
563 } | |
564 | |
565 | |
566 | |
567 // Support class with a collection of functions used when dumping the heap | |
568 | |
569 class DumperSupport : AllStatic { | |
570 public: | |
571 | |
572 // write a header of the given type | |
573 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
574 | |
575 // returns hprof tag for the given type signature | |
576 static hprofTag sig2tag(symbolOop sig); | |
577 // returns hprof tag for the given basic type | |
578 static hprofTag type2tag(BasicType type); | |
579 | |
580 // returns the size of the instance of the given class | |
581 static u4 instance_size(klassOop k); | |
582 | |
583 // dump a jfloat | |
584 static void dump_float(DumpWriter* writer, jfloat f); | |
585 // dump a jdouble | |
586 static void dump_double(DumpWriter* writer, jdouble d); | |
587 // dumps the raw value of the given field | |
588 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
589 // dumps static fields of the given class | |
590 static void dump_static_fields(DumpWriter* writer, klassOop k); | |
591 // dump the raw values of the instance fields of the given object | |
592 static void dump_instance_fields(DumpWriter* writer, oop o); | |
593 // dumps the definition of the instance fields for a given class | |
594 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); | |
595 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
596 static void dump_instance(DumpWriter* writer, oop o); | |
597 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
598 // array classes | |
599 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); | |
600 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
601 // class (and each multi-dimensional array class too) | |
602 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); | |
603 | |
604 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
605 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
606 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
607 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
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608 // create HPROF_FRAME record for the given method and bci |
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609 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, methodOop m, int bci); |
0 | 610 }; |
611 | |
612 // write a header of the given type | |
613 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
614 writer->write_u1((u1)tag); | |
615 writer->write_u4(0); // current ticks | |
616 writer->write_u4(len); | |
617 } | |
618 | |
619 // returns hprof tag for the given type signature | |
620 hprofTag DumperSupport::sig2tag(symbolOop sig) { | |
621 switch (sig->byte_at(0)) { | |
622 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
623 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
624 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
625 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
626 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
627 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
628 case JVM_SIGNATURE_INT : return HPROF_INT; | |
629 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
630 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
631 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
632 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
633 } | |
634 } | |
635 | |
636 hprofTag DumperSupport::type2tag(BasicType type) { | |
637 switch (type) { | |
638 case T_BYTE : return HPROF_BYTE; | |
639 case T_CHAR : return HPROF_CHAR; | |
640 case T_FLOAT : return HPROF_FLOAT; | |
641 case T_DOUBLE : return HPROF_DOUBLE; | |
642 case T_INT : return HPROF_INT; | |
643 case T_LONG : return HPROF_LONG; | |
644 case T_SHORT : return HPROF_SHORT; | |
645 case T_BOOLEAN : return HPROF_BOOLEAN; | |
646 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
647 } | |
648 } | |
649 | |
650 // dump a jfloat | |
651 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
652 if (g_isnan(f)) { | |
653 writer->write_u4(0x7fc00000); // collapsing NaNs | |
654 } else { | |
655 union { | |
656 int i; | |
657 float f; | |
658 } u; | |
659 u.f = (float)f; | |
660 writer->write_u4((u4)u.i); | |
661 } | |
662 } | |
663 | |
664 // dump a jdouble | |
665 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
666 union { | |
667 jlong l; | |
668 double d; | |
669 } u; | |
670 if (g_isnan(d)) { // collapsing NaNs | |
671 u.l = (jlong)(0x7ff80000); | |
672 u.l = (u.l << 32); | |
673 } else { | |
674 u.d = (double)d; | |
675 } | |
676 writer->write_u8((u8)u.l); | |
677 } | |
678 | |
679 // dumps the raw value of the given field | |
680 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
681 switch (type) { | |
682 case JVM_SIGNATURE_CLASS : | |
683 case JVM_SIGNATURE_ARRAY : { | |
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684 oop o; |
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685 if (UseCompressedOops) { |
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686 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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687 } else { |
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688 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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689 } |
0 | 690 |
691 // reflection and sun.misc.Unsafe classes may have a reference to a | |
692 // klassOop so filter it out. | |
693 if (o != NULL && o->is_klass()) { | |
694 o = NULL; | |
695 } | |
696 | |
697 // FIXME: When sharing is enabled we don't emit field references to objects | |
698 // in shared spaces. We can remove this once we write records for the classes | |
699 // and strings that are shared. | |
700 if (o != NULL && o->is_shared()) { | |
701 o = NULL; | |
702 } | |
703 writer->write_objectID(o); | |
704 break; | |
705 } | |
706 case JVM_SIGNATURE_BYTE : { | |
707 jbyte* b = (jbyte*)addr; | |
708 writer->write_u1((u1)*b); | |
709 break; | |
710 } | |
711 case JVM_SIGNATURE_CHAR : { | |
712 jchar* c = (jchar*)addr; | |
713 writer->write_u2((u2)*c); | |
714 break; | |
715 } | |
716 case JVM_SIGNATURE_SHORT : { | |
717 jshort* s = (jshort*)addr; | |
718 writer->write_u2((u2)*s); | |
719 break; | |
720 } | |
721 case JVM_SIGNATURE_FLOAT : { | |
722 jfloat* f = (jfloat*)addr; | |
723 dump_float(writer, *f); | |
724 break; | |
725 } | |
726 case JVM_SIGNATURE_DOUBLE : { | |
727 jdouble* f = (jdouble*)addr; | |
728 dump_double(writer, *f); | |
729 break; | |
730 } | |
731 case JVM_SIGNATURE_INT : { | |
732 jint* i = (jint*)addr; | |
733 writer->write_u4((u4)*i); | |
734 break; | |
735 } | |
736 case JVM_SIGNATURE_LONG : { | |
737 jlong* l = (jlong*)addr; | |
738 writer->write_u8((u8)*l); | |
739 break; | |
740 } | |
741 case JVM_SIGNATURE_BOOLEAN : { | |
742 jboolean* b = (jboolean*)addr; | |
743 writer->write_u1((u1)*b); | |
744 break; | |
745 } | |
746 default : ShouldNotReachHere(); | |
747 } | |
748 } | |
749 | |
750 // returns the size of the instance of the given class | |
751 u4 DumperSupport::instance_size(klassOop k) { | |
752 HandleMark hm; | |
753 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
754 | |
755 int size = 0; | |
756 | |
757 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
758 if (!fld.access_flags().is_static()) { | |
759 symbolOop sig = fld.signature(); | |
760 switch (sig->byte_at(0)) { | |
761 case JVM_SIGNATURE_CLASS : | |
762 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
763 | |
764 case JVM_SIGNATURE_BYTE : | |
765 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
766 | |
767 case JVM_SIGNATURE_CHAR : | |
768 case JVM_SIGNATURE_SHORT : size += 2; break; | |
769 | |
770 case JVM_SIGNATURE_INT : | |
771 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
772 | |
773 case JVM_SIGNATURE_LONG : | |
774 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
775 | |
776 default : ShouldNotReachHere(); | |
777 } | |
778 } | |
779 } | |
780 return (u4)size; | |
781 } | |
782 | |
783 // dumps static fields of the given class | |
784 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { | |
785 HandleMark hm; | |
786 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
787 | |
788 // pass 1 - count the static fields | |
789 u2 field_count = 0; | |
790 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
791 if (fldc.access_flags().is_static()) field_count++; | |
792 } | |
793 | |
794 writer->write_u2(field_count); | |
795 | |
796 // pass 2 - dump the field descriptors and raw values | |
797 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
798 if (fld.access_flags().is_static()) { | |
799 symbolOop sig = fld.signature(); | |
800 | |
801 writer->write_objectID(fld.name()); // name | |
802 writer->write_u1(sig2tag(sig)); // type | |
803 | |
804 // value | |
805 int offset = fld.offset(); | |
806 address addr = (address)k + offset; | |
807 | |
808 dump_field_value(writer, sig->byte_at(0), addr); | |
809 } | |
810 } | |
811 } | |
812 | |
813 // dump the raw values of the instance fields of the given object | |
814 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
815 HandleMark hm; | |
816 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
817 | |
818 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
819 if (!fld.access_flags().is_static()) { | |
820 symbolOop sig = fld.signature(); | |
821 address addr = (address)o + fld.offset(); | |
822 | |
823 dump_field_value(writer, sig->byte_at(0), addr); | |
824 } | |
825 } | |
826 } | |
827 | |
828 // dumps the definition of the instance fields for a given class | |
829 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { | |
830 HandleMark hm; | |
831 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
832 | |
833 // pass 1 - count the instance fields | |
834 u2 field_count = 0; | |
835 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
836 if (!fldc.access_flags().is_static()) field_count++; | |
837 } | |
838 | |
839 writer->write_u2(field_count); | |
840 | |
841 // pass 2 - dump the field descriptors | |
842 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
843 if (!fld.access_flags().is_static()) { | |
844 symbolOop sig = fld.signature(); | |
845 | |
846 writer->write_objectID(fld.name()); // name | |
847 writer->write_u1(sig2tag(sig)); // type | |
848 } | |
849 } | |
850 } | |
851 | |
852 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
853 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
854 klassOop k = o->klass(); | |
855 | |
856 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
857 writer->write_objectID(o); | |
858 writer->write_u4(STACK_TRACE_ID); | |
859 | |
860 // class ID | |
861 writer->write_classID(Klass::cast(k)); | |
862 | |
863 // number of bytes that follow | |
864 writer->write_u4(instance_size(k) ); | |
865 | |
866 // field values | |
867 dump_instance_fields(writer, o); | |
868 } | |
869 | |
870 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
871 // its array classes | |
872 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { | |
873 Klass* klass = Klass::cast(k); | |
874 assert(klass->oop_is_instance(), "not an instanceKlass"); | |
875 instanceKlass* ik = (instanceKlass*)klass; | |
876 | |
877 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
878 | |
879 // class ID | |
880 writer->write_classID(ik); | |
881 writer->write_u4(STACK_TRACE_ID); | |
882 | |
883 // super class ID | |
884 klassOop java_super = ik->java_super(); | |
885 if (java_super == NULL) { | |
886 writer->write_objectID(NULL); | |
887 } else { | |
888 writer->write_classID(Klass::cast(java_super)); | |
889 } | |
890 | |
891 writer->write_objectID(ik->class_loader()); | |
892 writer->write_objectID(ik->signers()); | |
893 writer->write_objectID(ik->protection_domain()); | |
894 | |
895 // reserved | |
896 writer->write_objectID(NULL); | |
897 writer->write_objectID(NULL); | |
898 | |
899 // instance size | |
900 writer->write_u4(DumperSupport::instance_size(k)); | |
901 | |
902 // size of constant pool - ignored by HAT 1.1 | |
903 writer->write_u2(0); | |
904 | |
905 // number of static fields | |
906 dump_static_fields(writer, k); | |
907 | |
908 // description of instance fields | |
909 dump_instance_field_descriptors(writer, k); | |
910 | |
911 // array classes | |
912 k = klass->array_klass_or_null(); | |
913 while (k != NULL) { | |
914 Klass* klass = Klass::cast(k); | |
915 assert(klass->oop_is_objArray(), "not an objArrayKlass"); | |
916 | |
917 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
918 writer->write_classID(klass); | |
919 writer->write_u4(STACK_TRACE_ID); | |
920 | |
921 // super class of array classes is java.lang.Object | |
922 java_super = klass->java_super(); | |
923 assert(java_super != NULL, "checking"); | |
924 writer->write_classID(Klass::cast(java_super)); | |
925 | |
926 writer->write_objectID(ik->class_loader()); | |
927 writer->write_objectID(ik->signers()); | |
928 writer->write_objectID(ik->protection_domain()); | |
929 | |
930 writer->write_objectID(NULL); // reserved | |
931 writer->write_objectID(NULL); | |
932 writer->write_u4(0); // instance size | |
933 writer->write_u2(0); // constant pool | |
934 writer->write_u2(0); // static fields | |
935 writer->write_u2(0); // instance fields | |
936 | |
937 // get the array class for the next rank | |
938 k = klass->array_klass_or_null(); | |
939 } | |
940 } | |
941 | |
942 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
943 // class (and each multi-dimensional array class too) | |
944 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { | |
945 // array classes | |
946 while (k != NULL) { | |
947 Klass* klass = Klass::cast(k); | |
948 | |
949 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
950 writer->write_classID(klass); | |
951 writer->write_u4(STACK_TRACE_ID); | |
952 | |
953 // super class of array classes is java.lang.Object | |
954 klassOop java_super = klass->java_super(); | |
955 assert(java_super != NULL, "checking"); | |
956 writer->write_classID(Klass::cast(java_super)); | |
957 | |
958 writer->write_objectID(NULL); // loader | |
959 writer->write_objectID(NULL); // signers | |
960 writer->write_objectID(NULL); // protection domain | |
961 | |
962 writer->write_objectID(NULL); // reserved | |
963 writer->write_objectID(NULL); | |
964 writer->write_u4(0); // instance size | |
965 writer->write_u2(0); // constant pool | |
966 writer->write_u2(0); // static fields | |
967 writer->write_u2(0); // instance fields | |
968 | |
969 // get the array class for the next rank | |
970 k = klass->array_klass_or_null(); | |
971 } | |
972 } | |
973 | |
974 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
975 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
976 | |
977 // filter this | |
978 if (array->klass() == Universe::systemObjArrayKlassObj()) return; | |
979 | |
980 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
981 writer->write_objectID(array); | |
982 writer->write_u4(STACK_TRACE_ID); | |
983 writer->write_u4((u4)array->length()); | |
984 | |
985 // array class ID | |
986 writer->write_classID(Klass::cast(array->klass())); | |
987 | |
988 // [id]* elements | |
989 for (int index=0; index<array->length(); index++) { | |
990 oop o = array->obj_at(index); | |
991 writer->write_objectID(o); | |
992 } | |
993 } | |
994 | |
995 #define WRITE_ARRAY(Array, Type, Size) \ | |
996 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
997 | |
998 | |
999 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
1000 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
1001 BasicType type = typeArrayKlass::cast(array->klass())->element_type(); | |
1002 | |
1003 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
1004 writer->write_objectID(array); | |
1005 writer->write_u4(STACK_TRACE_ID); | |
1006 writer->write_u4((u4)array->length()); | |
1007 writer->write_u1(type2tag(type)); | |
1008 | |
1009 // nothing to copy | |
1010 if (array->length() == 0) { | |
1011 return; | |
1012 } | |
1013 | |
1014 // If the byte ordering is big endian then we can copy most types directly | |
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1015 int length_in_bytes = array->length() * type2aelembytes(type); |
0 | 1016 assert(length_in_bytes > 0, "nothing to copy"); |
1017 | |
1018 switch (type) { | |
1019 case T_INT : { | |
1020 if (Bytes::is_Java_byte_ordering_different()) { | |
1021 WRITE_ARRAY(array, int, u4); | |
1022 } else { | |
1023 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
1024 } | |
1025 break; | |
1026 } | |
1027 case T_BYTE : { | |
1028 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
1029 break; | |
1030 } | |
1031 case T_CHAR : { | |
1032 if (Bytes::is_Java_byte_ordering_different()) { | |
1033 WRITE_ARRAY(array, char, u2); | |
1034 } else { | |
1035 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
1036 } | |
1037 break; | |
1038 } | |
1039 case T_SHORT : { | |
1040 if (Bytes::is_Java_byte_ordering_different()) { | |
1041 WRITE_ARRAY(array, short, u2); | |
1042 } else { | |
1043 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
1044 } | |
1045 break; | |
1046 } | |
1047 case T_BOOLEAN : { | |
1048 if (Bytes::is_Java_byte_ordering_different()) { | |
1049 WRITE_ARRAY(array, bool, u1); | |
1050 } else { | |
1051 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
1052 } | |
1053 break; | |
1054 } | |
1055 case T_LONG : { | |
1056 if (Bytes::is_Java_byte_ordering_different()) { | |
1057 WRITE_ARRAY(array, long, u8); | |
1058 } else { | |
1059 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
1060 } | |
1061 break; | |
1062 } | |
1063 | |
1064 // handle float/doubles in a special value to ensure than NaNs are | |
1065 // written correctly. TO DO: Check if we can avoid this on processors that | |
1066 // use IEEE 754. | |
1067 | |
1068 case T_FLOAT : { | |
1069 for (int i=0; i<array->length(); i++) { | |
1070 dump_float( writer, array->float_at(i) ); | |
1071 } | |
1072 break; | |
1073 } | |
1074 case T_DOUBLE : { | |
1075 for (int i=0; i<array->length(); i++) { | |
1076 dump_double( writer, array->double_at(i) ); | |
1077 } | |
1078 break; | |
1079 } | |
1080 default : ShouldNotReachHere(); | |
1081 } | |
1082 } | |
1083 | |
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1084 // create a HPROF_FRAME record of the given methodOop and bci |
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1085 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1086 int frame_serial_num, |
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1087 int class_serial_num, |
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1088 methodOop m, |
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1089 int bci) { |
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1090 int line_number; |
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1091 if (m->is_native()) { |
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1092 line_number = -3; // native frame |
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1093 } else { |
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1094 line_number = m->line_number_from_bci(bci); |
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1095 } |
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1096 |
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1097 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1098 writer->write_id(frame_serial_num); // frame serial number |
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1099 writer->write_objectID(m->name()); // method's name |
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1100 writer->write_objectID(m->signature()); // method's signature |
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1101 |
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1102 assert(Klass::cast(m->method_holder())->oop_is_instance(), "not instanceKlass"); |
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1103 writer->write_objectID(instanceKlass::cast(m->method_holder())->source_file_name()); // source file name |
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1104 writer->write_u4(class_serial_num); // class serial number |
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1105 writer->write_u4((u4) line_number); // line number |
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1106 } |
0 | 1107 |
1108 // Support class used to generate HPROF_UTF8 records from the entries in the | |
1109 // SymbolTable. | |
1110 | |
1111 class SymbolTableDumper : public OopClosure { | |
1112 private: | |
1113 DumpWriter* _writer; | |
1114 DumpWriter* writer() const { return _writer; } | |
1115 public: | |
1116 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
1117 void do_oop(oop* obj_p); | |
113
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1118 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1119 }; |
1120 | |
1121 void SymbolTableDumper::do_oop(oop* obj_p) { | |
1122 ResourceMark rm; | |
1123 symbolOop sym = (symbolOop)*obj_p; | |
1124 | |
1125 int len = sym->utf8_length(); | |
1126 if (len > 0) { | |
1127 char* s = sym->as_utf8(); | |
1128 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
1129 writer()->write_objectID(sym); | |
1130 writer()->write_raw(s, len); | |
1131 } | |
1132 } | |
1133 | |
1134 | |
1135 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
1136 | |
1137 class JNILocalsDumper : public OopClosure { | |
1138 private: | |
1139 DumpWriter* _writer; | |
1140 u4 _thread_serial_num; | |
396
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1141 int _frame_num; |
0 | 1142 DumpWriter* writer() const { return _writer; } |
1143 public: | |
1144 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
1145 _writer = writer; | |
1146 _thread_serial_num = thread_serial_num; | |
396
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1147 _frame_num = -1; // default - empty stack |
0 | 1148 } |
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1149 void set_frame_number(int n) { _frame_num = n; } |
0 | 1150 void do_oop(oop* obj_p); |
113
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1151 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1152 }; |
1153 | |
1154 | |
1155 void JNILocalsDumper::do_oop(oop* obj_p) { | |
1156 // ignore null or deleted handles | |
1157 oop o = *obj_p; | |
1158 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
1159 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
1160 writer()->write_objectID(o); | |
1161 writer()->write_u4(_thread_serial_num); | |
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1162 writer()->write_u4((u4)_frame_num); |
0 | 1163 } |
1164 } | |
1165 | |
1166 | |
1167 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
1168 | |
1169 class JNIGlobalsDumper : public OopClosure { | |
1170 private: | |
1171 DumpWriter* _writer; | |
1172 DumpWriter* writer() const { return _writer; } | |
1173 | |
1174 public: | |
1175 JNIGlobalsDumper(DumpWriter* writer) { | |
1176 _writer = writer; | |
1177 } | |
1178 void do_oop(oop* obj_p); | |
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1179 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1180 }; |
1181 | |
1182 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
1183 oop o = *obj_p; | |
1184 | |
1185 // ignore these | |
1186 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
1187 | |
1188 // we ignore global ref to symbols and other internal objects | |
1189 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
1190 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
1191 writer()->write_objectID(o); | |
1192 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
1193 } | |
1194 }; | |
1195 | |
1196 | |
1197 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
1198 | |
1199 class MonitorUsedDumper : public OopClosure { | |
1200 private: | |
1201 DumpWriter* _writer; | |
1202 DumpWriter* writer() const { return _writer; } | |
1203 public: | |
1204 MonitorUsedDumper(DumpWriter* writer) { | |
1205 _writer = writer; | |
1206 } | |
1207 void do_oop(oop* obj_p) { | |
1208 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
1209 writer()->write_objectID(*obj_p); | |
1210 } | |
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1211 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1212 }; |
1213 | |
1214 | |
1215 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
1216 | |
1217 class StickyClassDumper : public OopClosure { | |
1218 private: | |
1219 DumpWriter* _writer; | |
1220 DumpWriter* writer() const { return _writer; } | |
1221 public: | |
1222 StickyClassDumper(DumpWriter* writer) { | |
1223 _writer = writer; | |
1224 } | |
1225 void do_oop(oop* obj_p); | |
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1226 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1227 }; |
1228 | |
1229 void StickyClassDumper::do_oop(oop* obj_p) { | |
1230 if (*obj_p != NULL) { | |
1231 oop o = *obj_p; | |
1232 if (o->is_klass()) { | |
1233 klassOop k = klassOop(o); | |
1234 if (Klass::cast(k)->oop_is_instance()) { | |
1235 instanceKlass* ik = instanceKlass::cast(k); | |
1236 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); | |
1237 writer()->write_classID(ik); | |
1238 } | |
1239 } | |
1240 } | |
1241 } | |
1242 | |
1243 | |
1244 class VM_HeapDumper; | |
1245 | |
1246 // Support class using when iterating over the heap. | |
1247 | |
1248 class HeapObjectDumper : public ObjectClosure { | |
1249 private: | |
1250 VM_HeapDumper* _dumper; | |
1251 DumpWriter* _writer; | |
1252 | |
1253 VM_HeapDumper* dumper() { return _dumper; } | |
1254 DumpWriter* writer() { return _writer; } | |
1255 | |
1256 // used to indicate that a record has been writen | |
1257 void mark_end_of_record(); | |
1258 | |
1259 public: | |
1260 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
1261 _dumper = dumper; | |
1262 _writer = writer; | |
1263 } | |
1264 | |
1265 // called for each object in the heap | |
1266 void do_object(oop o); | |
1267 }; | |
1268 | |
1269 void HeapObjectDumper::do_object(oop o) { | |
1270 // hide the sentinel for deleted handles | |
1271 if (o == JNIHandles::deleted_handle()) return; | |
1272 | |
1273 // ignore KlassKlass objects | |
1274 if (o->is_klass()) return; | |
1275 | |
1276 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
1142 | 1277 if (o->klass() == SystemDictionary::Class_klass()) { |
0 | 1278 if (!java_lang_Class::is_primitive(o)) { |
1279 return; | |
1280 } | |
1281 } | |
1282 | |
1283 // create a HPROF_GC_INSTANCE record for each object | |
1284 if (o->is_instance()) { | |
1285 DumperSupport::dump_instance(writer(), o); | |
1286 mark_end_of_record(); | |
1287 } else { | |
1288 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
1289 if (o->is_objArray()) { | |
1290 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
1291 mark_end_of_record(); | |
1292 } else { | |
1293 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
1294 if (o->is_typeArray()) { | |
1295 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
1296 mark_end_of_record(); | |
1297 } | |
1298 } | |
1299 } | |
1300 } | |
1301 | |
1302 // The VM operation that performs the heap dump | |
1303 class VM_HeapDumper : public VM_GC_Operation { | |
1304 private: | |
615
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1305 static VM_HeapDumper* _global_dumper; |
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1306 static DumpWriter* _global_writer; |
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1307 DumpWriter* _local_writer; |
0 | 1308 bool _gc_before_heap_dump; |
1309 bool _is_segmented_dump; | |
1310 jlong _dump_start; | |
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1311 GrowableArray<Klass*>* _klass_map; |
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1312 ThreadStackTrace** _stack_traces; |
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1313 int _num_threads; |
0 | 1314 |
615
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1315 // accessors and setters |
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1316 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1317 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1318 void set_global_dumper() { |
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1319 assert(_global_dumper == NULL, "Error"); |
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1320 _global_dumper = this; |
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1321 } |
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1322 void set_global_writer() { |
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1323 assert(_global_writer == NULL, "Error"); |
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1324 _global_writer = _local_writer; |
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1325 } |
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1326 void clear_global_dumper() { _global_dumper = NULL; } |
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1327 void clear_global_writer() { _global_writer = NULL; } |
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1328 |
0 | 1329 bool is_segmented_dump() const { return _is_segmented_dump; } |
1330 void set_segmented_dump() { _is_segmented_dump = true; } | |
1331 jlong dump_start() const { return _dump_start; } | |
1332 void set_dump_start(jlong pos); | |
1333 | |
1334 bool skip_operation() const; | |
1335 | |
1336 // writes a HPROF_LOAD_CLASS record | |
1337 static void do_load_class(klassOop k); | |
1338 | |
1339 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
1340 // (and each array class too) | |
1341 static void do_class_dump(klassOop k); | |
1342 | |
1343 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1344 // array (and each multi-dimensional array too) | |
1345 static void do_basic_type_array_class_dump(klassOop k); | |
1346 | |
1347 // HPROF_GC_ROOT_THREAD_OBJ records | |
396
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1348 int do_thread(JavaThread* thread, u4 thread_serial_num); |
0 | 1349 void do_threads(); |
1350 | |
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1351 void add_class_serial_number(Klass* k, int serial_num) { |
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1352 _klass_map->at_put_grow(serial_num, k); |
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1353 } |
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1354 |
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1355 // HPROF_TRACE and HPROF_FRAME records |
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1356 void dump_stack_traces(); |
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1357 |
0 | 1358 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
1359 void write_dump_header(); | |
1360 | |
1361 // fixes up the length of the current dump record | |
1362 void write_current_dump_record_length(); | |
1363 | |
1364 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1365 // record in the case of a segmented heap dump) | |
1366 void end_of_dump(); | |
1367 | |
1368 public: | |
1369 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump) : | |
1370 VM_GC_Operation(0 /* total collections, dummy, ignored */, | |
1371 0 /* total full collections, dummy, ignored */, | |
1372 gc_before_heap_dump) { | |
615
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1373 _local_writer = writer; |
0 | 1374 _gc_before_heap_dump = gc_before_heap_dump; |
1375 _is_segmented_dump = false; | |
1376 _dump_start = (jlong)-1; | |
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1377 _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1378 _stack_traces = NULL; |
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1379 _num_threads = 0; |
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1380 } |
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1381 ~VM_HeapDumper() { |
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1382 if (_stack_traces != NULL) { |
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1383 for (int i=0; i < _num_threads; i++) { |
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1384 delete _stack_traces[i]; |
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1385 } |
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1386 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces); |
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1387 } |
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1388 delete _klass_map; |
0 | 1389 } |
1390 | |
1391 VMOp_Type type() const { return VMOp_HeapDumper; } | |
1392 // used to mark sub-record boundary | |
1393 void check_segment_length(); | |
1394 void doit(); | |
1395 }; | |
1396 | |
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1397 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1398 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1399 |
0 | 1400 bool VM_HeapDumper::skip_operation() const { |
1401 return false; | |
1402 } | |
1403 | |
1404 // sets the dump starting position | |
1405 void VM_HeapDumper::set_dump_start(jlong pos) { | |
1406 _dump_start = pos; | |
1407 } | |
1408 | |
1409 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
1410 void VM_HeapDumper::write_dump_header() { | |
1411 if (writer()->is_open()) { | |
1412 if (is_segmented_dump()) { | |
1413 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
1414 } else { | |
1415 writer()->write_u1(HPROF_HEAP_DUMP); | |
1416 } | |
1417 writer()->write_u4(0); // current ticks | |
1418 | |
1419 // record the starting position for the dump (its length will be fixed up later) | |
1420 set_dump_start(writer()->current_offset()); | |
1421 writer()->write_u4(0); | |
1422 } | |
1423 } | |
1424 | |
1425 // fixes up the length of the current dump record | |
1426 void VM_HeapDumper::write_current_dump_record_length() { | |
1427 if (writer()->is_open()) { | |
1428 assert(dump_start() >= 0, "no dump start recorded"); | |
1429 | |
1430 // calculate the size of the dump record | |
1431 jlong dump_end = writer()->current_offset(); | |
1432 jlong dump_len = (dump_end - dump_start() - 4); | |
1433 | |
1434 // record length must fit in a u4 | |
1435 if (dump_len > (jlong)(4L*(jlong)G)) { | |
1436 warning("record is too large"); | |
1437 } | |
1438 | |
1439 // seek to the dump start and fix-up the length | |
1440 writer()->seek_to_offset(dump_start()); | |
1441 writer()->write_u4((u4)dump_len); | |
1442 | |
1443 // adjust the total size written to keep the bytes written correct. | |
1444 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
1445 | |
1446 // seek to dump end so we can continue | |
1447 writer()->seek_to_offset(dump_end); | |
1448 | |
1449 // no current dump record | |
1450 set_dump_start((jlong)-1); | |
1451 } | |
1452 } | |
1453 | |
1454 // used on a sub-record boundary to check if we need to start a | |
1455 // new segment. | |
1456 void VM_HeapDumper::check_segment_length() { | |
1457 if (writer()->is_open()) { | |
1458 if (is_segmented_dump()) { | |
1459 // don't use current_offset that would be too expensive on a per record basis | |
1460 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
1461 assert(dump_end == writer()->current_offset(), "checking"); | |
1462 jlong dump_len = (dump_end - dump_start() - 4); | |
1463 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
1464 | |
1465 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
1466 write_current_dump_record_length(); | |
1467 write_dump_header(); | |
1468 } | |
1469 } | |
1470 } | |
1471 } | |
1472 | |
1473 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1474 // record in the case of a segmented heap dump) | |
1475 void VM_HeapDumper::end_of_dump() { | |
1476 if (writer()->is_open()) { | |
1477 write_current_dump_record_length(); | |
1478 | |
1479 // for segmented dump we write the end record | |
1480 if (is_segmented_dump()) { | |
1481 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
1482 writer()->write_u4(0); | |
1483 writer()->write_u4(0); | |
1484 } | |
1485 } | |
1486 } | |
1487 | |
1488 // marks sub-record boundary | |
1489 void HeapObjectDumper::mark_end_of_record() { | |
1490 dumper()->check_segment_length(); | |
1491 } | |
1492 | |
1493 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
1494 // array classes) | |
1495 void VM_HeapDumper::do_load_class(klassOop k) { | |
1496 static u4 class_serial_num = 0; | |
1497 | |
1498 // len of HPROF_LOAD_CLASS record | |
1499 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
1500 | |
1501 // write a HPROF_LOAD_CLASS for the class and each array class | |
1502 do { | |
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1503 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
0 | 1504 |
1505 // class serial number is just a number | |
615
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1506 writer()->write_u4(++class_serial_num); |
0 | 1507 |
1508 // class ID | |
1509 Klass* klass = Klass::cast(k); | |
615
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1510 writer()->write_classID(klass); |
0 | 1511 |
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1512 // add the klassOop and class serial number pair |
615
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1513 dumper()->add_class_serial_number(klass, class_serial_num); |
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1514 |
615
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1515 writer()->write_u4(STACK_TRACE_ID); |
0 | 1516 |
1517 // class name ID | |
1518 symbolOop name = klass->name(); | |
615
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1519 writer()->write_objectID(name); |
0 | 1520 |
1521 // write a LOAD_CLASS record for the array type (if it exists) | |
1522 k = klass->array_klass_or_null(); | |
1523 } while (k != NULL); | |
1524 } | |
1525 | |
1526 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
1527 void VM_HeapDumper::do_class_dump(klassOop k) { | |
615
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1528 DumperSupport::dump_class_and_array_classes(writer(), k); |
0 | 1529 } |
1530 | |
1531 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1532 // array (and each multi-dimensional array too) | |
1533 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { | |
615
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1534 DumperSupport::dump_basic_type_array_class(writer(), k); |
0 | 1535 } |
1536 | |
1537 // Walk the stack of the given thread. | |
1538 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
1539 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
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1540 // |
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1541 // It returns the number of Java frames in this thread stack |
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1542 int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
0 | 1543 JNILocalsDumper blk(writer(), thread_serial_num); |
1544 | |
1545 oop threadObj = java_thread->threadObj(); | |
1546 assert(threadObj != NULL, "sanity check"); | |
1547 | |
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1548 int stack_depth = 0; |
0 | 1549 if (java_thread->has_last_Java_frame()) { |
1550 | |
1551 // vframes are resource allocated | |
1552 Thread* current_thread = Thread::current(); | |
1553 ResourceMark rm(current_thread); | |
1554 HandleMark hm(current_thread); | |
1555 | |
1556 RegisterMap reg_map(java_thread); | |
1557 frame f = java_thread->last_frame(); | |
1558 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
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1559 frame* last_entry_frame = NULL; |
0 | 1560 |
1561 while (vf != NULL) { | |
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1562 blk.set_frame_number(stack_depth); |
0 | 1563 if (vf->is_java_frame()) { |
1564 | |
1565 // java frame (interpreted, compiled, ...) | |
1566 javaVFrame *jvf = javaVFrame::cast(vf); | |
1567 if (!(jvf->method()->is_native())) { | |
1568 StackValueCollection* locals = jvf->locals(); | |
1569 for (int slot=0; slot<locals->size(); slot++) { | |
1570 if (locals->at(slot)->type() == T_OBJECT) { | |
1571 oop o = locals->obj_at(slot)(); | |
1572 | |
1573 if (o != NULL) { | |
1574 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
1575 writer()->write_objectID(o); | |
1576 writer()->write_u4(thread_serial_num); | |
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1577 writer()->write_u4((u4) stack_depth); |
0 | 1578 } |
1579 } | |
1580 } | |
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1581 } else { |
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1582 // native frame |
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1583 if (stack_depth == 0) { |
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1584 // JNI locals for the top frame. |
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1585 java_thread->active_handles()->oops_do(&blk); |
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1586 } else { |
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1587 if (last_entry_frame != NULL) { |
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1588 // JNI locals for the entry frame |
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1589 assert(last_entry_frame->is_entry_frame(), "checking"); |
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1590 last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
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1591 } |
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1592 } |
0 | 1593 } |
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1594 // increment only for Java frames |
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1595 stack_depth++; |
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1596 last_entry_frame = NULL; |
0 | 1597 |
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1598 } else { |
0 | 1599 // externalVFrame - if it's an entry frame then report any JNI locals |
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1600 // as roots when we find the corresponding native javaVFrame |
0 | 1601 frame* fr = vf->frame_pointer(); |
1602 assert(fr != NULL, "sanity check"); | |
1603 if (fr->is_entry_frame()) { | |
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1604 last_entry_frame = fr; |
0 | 1605 } |
1606 } | |
1607 vf = vf->sender(); | |
1608 } | |
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1609 } else { |
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1610 // no last java frame but there may be JNI locals |
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1611 java_thread->active_handles()->oops_do(&blk); |
0 | 1612 } |
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1613 return stack_depth; |
0 | 1614 } |
1615 | |
1616 | |
1617 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
1618 // the stack so that locals and JNI locals are dumped. | |
1619 void VM_HeapDumper::do_threads() { | |
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1620 for (int i=0; i < _num_threads; i++) { |
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1621 JavaThread* thread = _stack_traces[i]->thread(); |
0 | 1622 oop threadObj = thread->threadObj(); |
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1623 u4 thread_serial_num = i+1; |
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1624 u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
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1625 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
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1626 writer()->write_objectID(threadObj); |
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1627 writer()->write_u4(thread_serial_num); // thread number |
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1628 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1629 int num_frames = do_thread(thread, thread_serial_num); |
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1630 assert(num_frames == _stack_traces[i]->get_stack_depth(), |
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1631 "total number of Java frames not matched"); |
0 | 1632 } |
1633 } | |
1634 | |
1635 | |
1636 // The VM operation that dumps the heap. The dump consists of the following | |
1637 // records: | |
1638 // | |
1639 // HPROF_HEADER | |
1640 // [HPROF_UTF8]* | |
1641 // [HPROF_LOAD_CLASS]* | |
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1642 // [[HPROF_FRAME]*|HPROF_TRACE]* |
0 | 1643 // [HPROF_GC_CLASS_DUMP]* |
1644 // HPROF_HEAP_DUMP | |
1645 // | |
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1646 // The HPROF_TRACE records represent the stack traces where the heap dump |
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1647 // is generated and a "dummy trace" record which does not include |
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1648 // any frames. The dummy trace record is used to be referenced as the |
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1649 // unknown object alloc site. |
0 | 1650 // |
1651 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
1652 // the heap dump be generated in a single pass we remember the position of | |
1653 // the dump length and fix it up after all sub-records have been written. | |
1654 // To generate the sub-records we iterate over the heap, writing | |
1655 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
1656 // records as we go. Once that is done we write records for some of the GC | |
1657 // roots. | |
1658 | |
1659 void VM_HeapDumper::doit() { | |
1660 | |
1661 HandleMark hm; | |
1662 CollectedHeap* ch = Universe::heap(); | |
1663 if (_gc_before_heap_dump) { | |
1664 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
1665 } else { | |
1666 // make the heap parsable (no need to retire TLABs) | |
1667 ch->ensure_parsability(false); | |
1668 } | |
1669 | |
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1670 // At this point we should be the only dumper active, so |
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1671 // the following should be safe. |
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1672 set_global_dumper(); |
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1673 set_global_writer(); |
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1674 |
0 | 1675 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
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1676 size_t used = ch->used(); |
0 | 1677 const char* header; |
1678 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
1679 set_segmented_dump(); | |
1680 header = "JAVA PROFILE 1.0.2"; | |
1681 } else { | |
1682 header = "JAVA PROFILE 1.0.1"; | |
1683 } | |
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1684 |
0 | 1685 // header is few bytes long - no chance to overflow int |
1686 writer()->write_raw((void*)header, (int)strlen(header)); | |
1687 writer()->write_u1(0); // terminator | |
1688 writer()->write_u4(oopSize); | |
1689 writer()->write_u8(os::javaTimeMillis()); | |
1690 | |
1691 // HPROF_UTF8 records | |
1692 SymbolTableDumper sym_dumper(writer()); | |
1693 SymbolTable::oops_do(&sym_dumper); | |
1694 | |
1695 // write HPROF_LOAD_CLASS records | |
1696 SystemDictionary::classes_do(&do_load_class); | |
1697 Universe::basic_type_classes_do(&do_load_class); | |
1698 | |
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1699 // write HPROF_FRAME and HPROF_TRACE records |
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1700 // this must be called after _klass_map is built when iterating the classes above. |
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1701 dump_stack_traces(); |
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1702 |
0 | 1703 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
1704 write_dump_header(); | |
1705 | |
1706 // Writes HPROF_GC_CLASS_DUMP records | |
1707 SystemDictionary::classes_do(&do_class_dump); | |
1708 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); | |
1709 check_segment_length(); | |
1710 | |
1711 // writes HPROF_GC_INSTANCE_DUMP records. | |
1712 // After each sub-record is written check_segment_length will be invoked. When | |
1713 // generated a segmented heap dump this allows us to check if the current | |
1714 // segment exceeds a threshold and if so, then a new segment is started. | |
1715 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
1716 // of the heap dump. | |
1717 HeapObjectDumper obj_dumper(this, writer()); | |
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1718 Universe::heap()->safe_object_iterate(&obj_dumper); |
0 | 1719 |
1720 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
1721 do_threads(); | |
1722 check_segment_length(); | |
1723 | |
1724 // HPROF_GC_ROOT_MONITOR_USED | |
1725 MonitorUsedDumper mon_dumper(writer()); | |
1726 ObjectSynchronizer::oops_do(&mon_dumper); | |
1727 check_segment_length(); | |
1728 | |
1729 // HPROF_GC_ROOT_JNI_GLOBAL | |
1730 JNIGlobalsDumper jni_dumper(writer()); | |
1731 JNIHandles::oops_do(&jni_dumper); | |
1732 check_segment_length(); | |
1733 | |
1734 // HPROF_GC_ROOT_STICKY_CLASS | |
1735 StickyClassDumper class_dumper(writer()); | |
1736 SystemDictionary::always_strong_oops_do(&class_dumper); | |
1737 | |
1738 // fixes up the length of the dump record. In the case of a segmented | |
1739 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
1740 end_of_dump(); | |
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1741 |
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1742 // Now we clear the global variables, so that a future dumper might run. |
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1743 clear_global_dumper(); |
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1744 clear_global_writer(); |
0 | 1745 } |
1746 | |
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1747 void VM_HeapDumper::dump_stack_traces() { |
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1748 // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
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1749 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
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1750 writer()->write_u4((u4) STACK_TRACE_ID); |
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1751 writer()->write_u4(0); // thread number |
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1752 writer()->write_u4(0); // frame count |
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1753 |
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1754 _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads()); |
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1755 int frame_serial_num = 0; |
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1756 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
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1757 oop threadObj = thread->threadObj(); |
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1758 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
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1759 // dump thread stack trace |
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1760 ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
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1761 stack_trace->dump_stack_at_safepoint(-1); |
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1762 _stack_traces[_num_threads++] = stack_trace; |
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1763 |
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1764 // write HPROF_FRAME records for this thread's stack trace |
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1765 int depth = stack_trace->get_stack_depth(); |
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1766 int thread_frame_start = frame_serial_num; |
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1767 for (int j=0; j < depth; j++) { |
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1768 StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
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1769 methodOop m = frame->method(); |
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1770 int class_serial_num = _klass_map->find(Klass::cast(m->method_holder())); |
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1771 // the class serial number starts from 1 |
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1772 assert(class_serial_num > 0, "class not found"); |
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1773 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
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1774 } |
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1775 |
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1776 // write HPROF_TRACE record for one thread |
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1777 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
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1778 int stack_serial_num = _num_threads + STACK_TRACE_ID; |
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1779 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1780 writer()->write_u4((u4) _num_threads); // thread serial number |
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1781 writer()->write_u4(depth); // frame count |
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1782 for (int j=1; j <= depth; j++) { |
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1783 writer()->write_id(thread_frame_start + j); |
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1784 } |
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1785 } |
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1786 } |
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1787 } |
0 | 1788 |
1789 // dump the heap to given path. | |
1790 int HeapDumper::dump(const char* path) { | |
1791 assert(path != NULL && strlen(path) > 0, "path missing"); | |
1792 | |
1793 // print message in interactive case | |
1794 if (print_to_tty()) { | |
1795 tty->print_cr("Dumping heap to %s ...", path); | |
1796 timer()->start(); | |
1797 } | |
1798 | |
1799 // create the dump writer. If the file can be opened then bail | |
1800 DumpWriter writer(path); | |
1801 if (!writer.is_open()) { | |
1802 set_error(writer.error()); | |
1803 if (print_to_tty()) { | |
1804 tty->print_cr("Unable to create %s: %s", path, | |
1805 (error() != NULL) ? error() : "reason unknown"); | |
1806 } | |
1807 return -1; | |
1808 } | |
1809 | |
1810 // generate the dump | |
1811 VM_HeapDumper dumper(&writer, _gc_before_heap_dump); | |
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1812 if (Thread::current()->is_VM_thread()) { |
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1813 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1814 dumper.doit(); |
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1815 } else { |
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1816 VMThread::execute(&dumper); |
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1817 } |
0 | 1818 |
1819 // close dump file and record any error that the writer may have encountered | |
1820 writer.close(); | |
1821 set_error(writer.error()); | |
1822 | |
1823 // print message in interactive case | |
1824 if (print_to_tty()) { | |
1825 timer()->stop(); | |
1826 if (error() == NULL) { | |
1827 char msg[256]; | |
1828 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
1829 os::jlong_format_specifier(), timer()->seconds()); | |
1830 tty->print_cr(msg, writer.bytes_written()); | |
1831 } else { | |
1832 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
1833 } | |
1834 } | |
1835 | |
1836 return (writer.error() == NULL) ? 0 : -1; | |
1837 } | |
1838 | |
1839 // stop timer (if still active), and free any error string we might be holding | |
1840 HeapDumper::~HeapDumper() { | |
1841 if (timer()->is_active()) { | |
1842 timer()->stop(); | |
1843 } | |
1844 set_error(NULL); | |
1845 } | |
1846 | |
1847 | |
1848 // returns the error string (resource allocated), or NULL | |
1849 char* HeapDumper::error_as_C_string() const { | |
1850 if (error() != NULL) { | |
1851 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
1852 strcpy(str, error()); | |
1853 return str; | |
1854 } else { | |
1855 return NULL; | |
1856 } | |
1857 } | |
1858 | |
1859 // set the error string | |
1860 void HeapDumper::set_error(char* error) { | |
1861 if (_error != NULL) { | |
1862 os::free(_error); | |
1863 } | |
1864 if (error == NULL) { | |
1865 _error = NULL; | |
1866 } else { | |
1867 _error = os::strdup(error); | |
1868 assert(_error != NULL, "allocation failure"); | |
1869 } | |
1870 } | |
1871 | |
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1872 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1873 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1874 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1875 // general use, however, this method will need modification to prevent |
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1876 // inteference when updating the static variables base_path and dump_file_seq below. |
0 | 1877 void HeapDumper::dump_heap() { |
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1878 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1879 static uint dump_file_seq = 0; |
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1880 char my_path[JVM_MAXPATHLEN] = {'\0'}; |
0 | 1881 |
1882 // The dump file defaults to java_pid<pid>.hprof in the current working | |
1883 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
1884 // dump file name or a directory where dump file is created. | |
615
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1885 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1886 bool use_default_filename = true; |
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1887 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1888 // HeapDumpPath=<file> not specified |
0 | 1889 } else { |
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1890 assert(strlen(HeapDumpPath) < sizeof(base_path), "HeapDumpPath too long"); |
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1891 strcpy(base_path, HeapDumpPath); |
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1892 // check if the path is a directory (must exist) |
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1893 DIR* dir = os::opendir(base_path); |
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1894 if (dir == NULL) { |
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1895 use_default_filename = false; |
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1896 } else { |
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1897 // HeapDumpPath specified a directory. We append a file separator |
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1898 // (if needed). |
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1899 os::closedir(dir); |
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1900 size_t fs_len = strlen(os::file_separator()); |
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1901 if (strlen(base_path) >= fs_len) { |
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1902 char* end = base_path; |
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1903 end += (strlen(base_path) - fs_len); |
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1904 if (strcmp(end, os::file_separator()) != 0) { |
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1905 assert(strlen(base_path) + strlen(os::file_separator()) < sizeof(base_path), |
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1906 "HeapDumpPath too long"); |
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1907 strcat(base_path, os::file_separator()); |
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1908 } |
0 | 1909 } |
1910 } | |
1911 } | |
615
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1912 // If HeapDumpPath wasn't a file name then we append the default name |
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1913 if (use_default_filename) { |
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1914 char fn[32]; |
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1915 sprintf(fn, "java_pid%d", os::current_process_id()); |
1046 | 1916 assert(strlen(base_path) + strlen(fn) + strlen(".hprof") < sizeof(base_path), "HeapDumpPath too long"); |
615
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1917 strcat(base_path, fn); |
1046 | 1918 strcat(base_path, ".hprof"); |
615
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1919 } |
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1920 assert(strlen(base_path) < sizeof(my_path), "Buffer too small"); |
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1921 strcpy(my_path, base_path); |
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1922 } else { |
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1923 // Append a sequence number id for dumps following the first |
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1924 char fn[33]; |
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1925 sprintf(fn, ".%d", dump_file_seq); |
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1926 assert(strlen(base_path) + strlen(fn) < sizeof(my_path), "HeapDumpPath too long"); |
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1927 strcpy(my_path, base_path); |
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1928 strcat(my_path, fn); |
0 | 1929 } |
615
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1930 dump_file_seq++; // increment seq number for next time we dump |
0 | 1931 |
1932 HeapDumper dumper(false /* no GC before heap dump */, | |
1933 true /* send to tty */); | |
615
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1934 dumper.dump(my_path); |
0 | 1935 } |