Mercurial > hg > truffle
annotate src/share/vm/services/heapDumper.cpp @ 372:be41fa651400
Merge
author | rasbold |
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date | Tue, 30 Sep 2008 15:53:55 -0700 |
parents | 1ee8caae33af |
children | 4d05b7cb7842 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2005-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
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 { | |
346 STACK_TRACE_ID = 1 | |
347 }; | |
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); | |
411 }; | |
412 | |
413 DumpWriter::DumpWriter(const char* path) { | |
414 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
415 // sufficient memory then reduce size until we can allocate something. | |
416 _size = io_buffer_size; | |
417 do { | |
418 _buffer = (char*)os::malloc(_size); | |
419 if (_buffer == NULL) { | |
420 _size = _size >> 1; | |
421 } | |
422 } while (_buffer == NULL && _size > 0); | |
423 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
424 _pos = 0; | |
425 _error = NULL; | |
426 _bytes_written = 0L; | |
427 _fd = os::create_binary_file(path, false); // don't replace existing file | |
428 | |
429 // if the open failed we record the error | |
430 if (_fd < 0) { | |
431 _error = (char*)os::strdup(strerror(errno)); | |
432 } | |
433 } | |
434 | |
435 DumpWriter::~DumpWriter() { | |
436 // flush and close dump file | |
437 if (file_descriptor() >= 0) { | |
438 close(); | |
439 } | |
440 if (_buffer != NULL) os::free(_buffer); | |
441 if (_error != NULL) os::free(_error); | |
442 } | |
443 | |
444 // closes dump file (if open) | |
445 void DumpWriter::close() { | |
446 // flush and close dump file | |
447 if (file_descriptor() >= 0) { | |
448 flush(); | |
449 ::close(file_descriptor()); | |
450 } | |
451 } | |
452 | |
453 // write directly to the file | |
454 void DumpWriter::write_internal(void* s, int len) { | |
455 if (is_open()) { | |
456 int n = ::write(file_descriptor(), s, len); | |
457 if (n > 0) { | |
458 _bytes_written += n; | |
459 } | |
460 if (n != len) { | |
461 if (n < 0) { | |
462 set_error(strerror(errno)); | |
463 } else { | |
464 set_error("file size limit"); | |
465 } | |
466 ::close(file_descriptor()); | |
467 set_file_descriptor(-1); | |
468 } | |
469 } | |
470 } | |
471 | |
472 // write raw bytes | |
473 void DumpWriter::write_raw(void* s, int len) { | |
474 if (is_open()) { | |
475 // flush buffer to make toom | |
476 if ((position()+ len) >= buffer_size()) { | |
477 flush(); | |
478 } | |
479 | |
480 // buffer not available or too big to buffer it | |
481 if ((buffer() == NULL) || (len >= buffer_size())) { | |
482 write_internal(s, len); | |
483 } else { | |
484 // Should optimize this for u1/u2/u4/u8 sizes. | |
485 memcpy(buffer() + position(), s, len); | |
486 set_position(position() + len); | |
487 } | |
488 } | |
489 } | |
490 | |
491 // flush any buffered bytes to the file | |
492 void DumpWriter::flush() { | |
493 if (is_open() && position() > 0) { | |
494 write_internal(buffer(), position()); | |
495 set_position(0); | |
496 } | |
497 } | |
498 | |
499 | |
500 jlong DumpWriter::current_offset() { | |
501 if (is_open()) { | |
502 // the offset is the file offset plus whatever we have buffered | |
503 jlong offset = os::current_file_offset(file_descriptor()); | |
504 assert(offset >= 0, "lseek failed"); | |
505 return offset + (jlong)position(); | |
506 } else { | |
507 return (jlong)-1; | |
508 } | |
509 } | |
510 | |
511 void DumpWriter::seek_to_offset(jlong off) { | |
512 assert(off >= 0, "bad offset"); | |
513 | |
514 // need to flush before seeking | |
515 flush(); | |
516 | |
517 // may be closed due to I/O error | |
518 if (is_open()) { | |
519 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
520 assert(n >= 0, "lseek failed"); | |
521 } | |
522 } | |
523 | |
524 void DumpWriter::write_u2(u2 x) { | |
525 u2 v; | |
526 Bytes::put_Java_u2((address)&v, x); | |
527 write_raw((void*)&v, 2); | |
528 } | |
529 | |
530 void DumpWriter::write_u4(u4 x) { | |
531 u4 v; | |
532 Bytes::put_Java_u4((address)&v, x); | |
533 write_raw((void*)&v, 4); | |
534 } | |
535 | |
536 void DumpWriter::write_u8(u8 x) { | |
537 u8 v; | |
538 Bytes::put_Java_u8((address)&v, x); | |
539 write_raw((void*)&v, 8); | |
540 } | |
541 | |
542 void DumpWriter::write_objectID(oop o) { | |
543 address a = (address)((uintptr_t)o); | |
544 #ifdef _LP64 | |
545 write_u8((u8)a); | |
546 #else | |
547 write_u4((u4)a); | |
548 #endif | |
549 } | |
550 | |
551 // We use java mirror as the class ID | |
552 void DumpWriter::write_classID(Klass* k) { | |
553 write_objectID(k->java_mirror()); | |
554 } | |
555 | |
556 | |
557 | |
558 // Support class with a collection of functions used when dumping the heap | |
559 | |
560 class DumperSupport : AllStatic { | |
561 public: | |
562 | |
563 // write a header of the given type | |
564 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
565 | |
566 // returns hprof tag for the given type signature | |
567 static hprofTag sig2tag(symbolOop sig); | |
568 // returns hprof tag for the given basic type | |
569 static hprofTag type2tag(BasicType type); | |
570 | |
571 // returns the size of the instance of the given class | |
572 static u4 instance_size(klassOop k); | |
573 | |
574 // dump a jfloat | |
575 static void dump_float(DumpWriter* writer, jfloat f); | |
576 // dump a jdouble | |
577 static void dump_double(DumpWriter* writer, jdouble d); | |
578 // dumps the raw value of the given field | |
579 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
580 // dumps static fields of the given class | |
581 static void dump_static_fields(DumpWriter* writer, klassOop k); | |
582 // dump the raw values of the instance fields of the given object | |
583 static void dump_instance_fields(DumpWriter* writer, oop o); | |
584 // dumps the definition of the instance fields for a given class | |
585 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); | |
586 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
587 static void dump_instance(DumpWriter* writer, oop o); | |
588 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
589 // array classes | |
590 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); | |
591 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
592 // class (and each multi-dimensional array class too) | |
593 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); | |
594 | |
595 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
596 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
597 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
598 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
599 }; | |
600 | |
601 // write a header of the given type | |
602 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
603 writer->write_u1((u1)tag); | |
604 writer->write_u4(0); // current ticks | |
605 writer->write_u4(len); | |
606 } | |
607 | |
608 // returns hprof tag for the given type signature | |
609 hprofTag DumperSupport::sig2tag(symbolOop sig) { | |
610 switch (sig->byte_at(0)) { | |
611 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
612 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
613 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
614 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
615 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
616 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
617 case JVM_SIGNATURE_INT : return HPROF_INT; | |
618 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
619 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
620 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
621 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
622 } | |
623 } | |
624 | |
625 hprofTag DumperSupport::type2tag(BasicType type) { | |
626 switch (type) { | |
627 case T_BYTE : return HPROF_BYTE; | |
628 case T_CHAR : return HPROF_CHAR; | |
629 case T_FLOAT : return HPROF_FLOAT; | |
630 case T_DOUBLE : return HPROF_DOUBLE; | |
631 case T_INT : return HPROF_INT; | |
632 case T_LONG : return HPROF_LONG; | |
633 case T_SHORT : return HPROF_SHORT; | |
634 case T_BOOLEAN : return HPROF_BOOLEAN; | |
635 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
636 } | |
637 } | |
638 | |
639 // dump a jfloat | |
640 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
641 if (g_isnan(f)) { | |
642 writer->write_u4(0x7fc00000); // collapsing NaNs | |
643 } else { | |
644 union { | |
645 int i; | |
646 float f; | |
647 } u; | |
648 u.f = (float)f; | |
649 writer->write_u4((u4)u.i); | |
650 } | |
651 } | |
652 | |
653 // dump a jdouble | |
654 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
655 union { | |
656 jlong l; | |
657 double d; | |
658 } u; | |
659 if (g_isnan(d)) { // collapsing NaNs | |
660 u.l = (jlong)(0x7ff80000); | |
661 u.l = (u.l << 32); | |
662 } else { | |
663 u.d = (double)d; | |
664 } | |
665 writer->write_u8((u8)u.l); | |
666 } | |
667 | |
668 // dumps the raw value of the given field | |
669 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
670 switch (type) { | |
671 case JVM_SIGNATURE_CLASS : | |
672 case JVM_SIGNATURE_ARRAY : { | |
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673 oop o; |
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674 if (UseCompressedOops) { |
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675 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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676 } else { |
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677 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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678 } |
0 | 679 |
680 // reflection and sun.misc.Unsafe classes may have a reference to a | |
681 // klassOop so filter it out. | |
682 if (o != NULL && o->is_klass()) { | |
683 o = NULL; | |
684 } | |
685 | |
686 // FIXME: When sharing is enabled we don't emit field references to objects | |
687 // in shared spaces. We can remove this once we write records for the classes | |
688 // and strings that are shared. | |
689 if (o != NULL && o->is_shared()) { | |
690 o = NULL; | |
691 } | |
692 writer->write_objectID(o); | |
693 break; | |
694 } | |
695 case JVM_SIGNATURE_BYTE : { | |
696 jbyte* b = (jbyte*)addr; | |
697 writer->write_u1((u1)*b); | |
698 break; | |
699 } | |
700 case JVM_SIGNATURE_CHAR : { | |
701 jchar* c = (jchar*)addr; | |
702 writer->write_u2((u2)*c); | |
703 break; | |
704 } | |
705 case JVM_SIGNATURE_SHORT : { | |
706 jshort* s = (jshort*)addr; | |
707 writer->write_u2((u2)*s); | |
708 break; | |
709 } | |
710 case JVM_SIGNATURE_FLOAT : { | |
711 jfloat* f = (jfloat*)addr; | |
712 dump_float(writer, *f); | |
713 break; | |
714 } | |
715 case JVM_SIGNATURE_DOUBLE : { | |
716 jdouble* f = (jdouble*)addr; | |
717 dump_double(writer, *f); | |
718 break; | |
719 } | |
720 case JVM_SIGNATURE_INT : { | |
721 jint* i = (jint*)addr; | |
722 writer->write_u4((u4)*i); | |
723 break; | |
724 } | |
725 case JVM_SIGNATURE_LONG : { | |
726 jlong* l = (jlong*)addr; | |
727 writer->write_u8((u8)*l); | |
728 break; | |
729 } | |
730 case JVM_SIGNATURE_BOOLEAN : { | |
731 jboolean* b = (jboolean*)addr; | |
732 writer->write_u1((u1)*b); | |
733 break; | |
734 } | |
735 default : ShouldNotReachHere(); | |
736 } | |
737 } | |
738 | |
739 // returns the size of the instance of the given class | |
740 u4 DumperSupport::instance_size(klassOop k) { | |
741 HandleMark hm; | |
742 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
743 | |
744 int size = 0; | |
745 | |
746 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
747 if (!fld.access_flags().is_static()) { | |
748 symbolOop sig = fld.signature(); | |
749 switch (sig->byte_at(0)) { | |
750 case JVM_SIGNATURE_CLASS : | |
751 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
752 | |
753 case JVM_SIGNATURE_BYTE : | |
754 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
755 | |
756 case JVM_SIGNATURE_CHAR : | |
757 case JVM_SIGNATURE_SHORT : size += 2; break; | |
758 | |
759 case JVM_SIGNATURE_INT : | |
760 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
761 | |
762 case JVM_SIGNATURE_LONG : | |
763 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
764 | |
765 default : ShouldNotReachHere(); | |
766 } | |
767 } | |
768 } | |
769 return (u4)size; | |
770 } | |
771 | |
772 // dumps static fields of the given class | |
773 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { | |
774 HandleMark hm; | |
775 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
776 | |
777 // pass 1 - count the static fields | |
778 u2 field_count = 0; | |
779 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
780 if (fldc.access_flags().is_static()) field_count++; | |
781 } | |
782 | |
783 writer->write_u2(field_count); | |
784 | |
785 // pass 2 - dump the field descriptors and raw values | |
786 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
787 if (fld.access_flags().is_static()) { | |
788 symbolOop sig = fld.signature(); | |
789 | |
790 writer->write_objectID(fld.name()); // name | |
791 writer->write_u1(sig2tag(sig)); // type | |
792 | |
793 // value | |
794 int offset = fld.offset(); | |
795 address addr = (address)k + offset; | |
796 | |
797 dump_field_value(writer, sig->byte_at(0), addr); | |
798 } | |
799 } | |
800 } | |
801 | |
802 // dump the raw values of the instance fields of the given object | |
803 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
804 HandleMark hm; | |
805 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
806 | |
807 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
808 if (!fld.access_flags().is_static()) { | |
809 symbolOop sig = fld.signature(); | |
810 address addr = (address)o + fld.offset(); | |
811 | |
812 dump_field_value(writer, sig->byte_at(0), addr); | |
813 } | |
814 } | |
815 } | |
816 | |
817 // dumps the definition of the instance fields for a given class | |
818 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { | |
819 HandleMark hm; | |
820 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
821 | |
822 // pass 1 - count the instance fields | |
823 u2 field_count = 0; | |
824 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
825 if (!fldc.access_flags().is_static()) field_count++; | |
826 } | |
827 | |
828 writer->write_u2(field_count); | |
829 | |
830 // pass 2 - dump the field descriptors | |
831 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
832 if (!fld.access_flags().is_static()) { | |
833 symbolOop sig = fld.signature(); | |
834 | |
835 writer->write_objectID(fld.name()); // name | |
836 writer->write_u1(sig2tag(sig)); // type | |
837 } | |
838 } | |
839 } | |
840 | |
841 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
842 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
843 klassOop k = o->klass(); | |
844 | |
845 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
846 writer->write_objectID(o); | |
847 writer->write_u4(STACK_TRACE_ID); | |
848 | |
849 // class ID | |
850 writer->write_classID(Klass::cast(k)); | |
851 | |
852 // number of bytes that follow | |
853 writer->write_u4(instance_size(k) ); | |
854 | |
855 // field values | |
856 dump_instance_fields(writer, o); | |
857 } | |
858 | |
859 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
860 // its array classes | |
861 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { | |
862 Klass* klass = Klass::cast(k); | |
863 assert(klass->oop_is_instance(), "not an instanceKlass"); | |
864 instanceKlass* ik = (instanceKlass*)klass; | |
865 | |
866 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
867 | |
868 // class ID | |
869 writer->write_classID(ik); | |
870 writer->write_u4(STACK_TRACE_ID); | |
871 | |
872 // super class ID | |
873 klassOop java_super = ik->java_super(); | |
874 if (java_super == NULL) { | |
875 writer->write_objectID(NULL); | |
876 } else { | |
877 writer->write_classID(Klass::cast(java_super)); | |
878 } | |
879 | |
880 writer->write_objectID(ik->class_loader()); | |
881 writer->write_objectID(ik->signers()); | |
882 writer->write_objectID(ik->protection_domain()); | |
883 | |
884 // reserved | |
885 writer->write_objectID(NULL); | |
886 writer->write_objectID(NULL); | |
887 | |
888 // instance size | |
889 writer->write_u4(DumperSupport::instance_size(k)); | |
890 | |
891 // size of constant pool - ignored by HAT 1.1 | |
892 writer->write_u2(0); | |
893 | |
894 // number of static fields | |
895 dump_static_fields(writer, k); | |
896 | |
897 // description of instance fields | |
898 dump_instance_field_descriptors(writer, k); | |
899 | |
900 // array classes | |
901 k = klass->array_klass_or_null(); | |
902 while (k != NULL) { | |
903 Klass* klass = Klass::cast(k); | |
904 assert(klass->oop_is_objArray(), "not an objArrayKlass"); | |
905 | |
906 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
907 writer->write_classID(klass); | |
908 writer->write_u4(STACK_TRACE_ID); | |
909 | |
910 // super class of array classes is java.lang.Object | |
911 java_super = klass->java_super(); | |
912 assert(java_super != NULL, "checking"); | |
913 writer->write_classID(Klass::cast(java_super)); | |
914 | |
915 writer->write_objectID(ik->class_loader()); | |
916 writer->write_objectID(ik->signers()); | |
917 writer->write_objectID(ik->protection_domain()); | |
918 | |
919 writer->write_objectID(NULL); // reserved | |
920 writer->write_objectID(NULL); | |
921 writer->write_u4(0); // instance size | |
922 writer->write_u2(0); // constant pool | |
923 writer->write_u2(0); // static fields | |
924 writer->write_u2(0); // instance fields | |
925 | |
926 // get the array class for the next rank | |
927 k = klass->array_klass_or_null(); | |
928 } | |
929 } | |
930 | |
931 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
932 // class (and each multi-dimensional array class too) | |
933 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { | |
934 // array classes | |
935 while (k != NULL) { | |
936 Klass* klass = Klass::cast(k); | |
937 | |
938 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
939 writer->write_classID(klass); | |
940 writer->write_u4(STACK_TRACE_ID); | |
941 | |
942 // super class of array classes is java.lang.Object | |
943 klassOop java_super = klass->java_super(); | |
944 assert(java_super != NULL, "checking"); | |
945 writer->write_classID(Klass::cast(java_super)); | |
946 | |
947 writer->write_objectID(NULL); // loader | |
948 writer->write_objectID(NULL); // signers | |
949 writer->write_objectID(NULL); // protection domain | |
950 | |
951 writer->write_objectID(NULL); // reserved | |
952 writer->write_objectID(NULL); | |
953 writer->write_u4(0); // instance size | |
954 writer->write_u2(0); // constant pool | |
955 writer->write_u2(0); // static fields | |
956 writer->write_u2(0); // instance fields | |
957 | |
958 // get the array class for the next rank | |
959 k = klass->array_klass_or_null(); | |
960 } | |
961 } | |
962 | |
963 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
964 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
965 | |
966 // filter this | |
967 if (array->klass() == Universe::systemObjArrayKlassObj()) return; | |
968 | |
969 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
970 writer->write_objectID(array); | |
971 writer->write_u4(STACK_TRACE_ID); | |
972 writer->write_u4((u4)array->length()); | |
973 | |
974 // array class ID | |
975 writer->write_classID(Klass::cast(array->klass())); | |
976 | |
977 // [id]* elements | |
978 for (int index=0; index<array->length(); index++) { | |
979 oop o = array->obj_at(index); | |
980 writer->write_objectID(o); | |
981 } | |
982 } | |
983 | |
984 #define WRITE_ARRAY(Array, Type, Size) \ | |
985 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
986 | |
987 | |
988 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
989 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
990 BasicType type = typeArrayKlass::cast(array->klass())->element_type(); | |
991 | |
992 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
993 writer->write_objectID(array); | |
994 writer->write_u4(STACK_TRACE_ID); | |
995 writer->write_u4((u4)array->length()); | |
996 writer->write_u1(type2tag(type)); | |
997 | |
998 // nothing to copy | |
999 if (array->length() == 0) { | |
1000 return; | |
1001 } | |
1002 | |
1003 // If the byte ordering is big endian then we can copy most types directly | |
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1004 int length_in_bytes = array->length() * type2aelembytes(type); |
0 | 1005 assert(length_in_bytes > 0, "nothing to copy"); |
1006 | |
1007 switch (type) { | |
1008 case T_INT : { | |
1009 if (Bytes::is_Java_byte_ordering_different()) { | |
1010 WRITE_ARRAY(array, int, u4); | |
1011 } else { | |
1012 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
1013 } | |
1014 break; | |
1015 } | |
1016 case T_BYTE : { | |
1017 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
1018 break; | |
1019 } | |
1020 case T_CHAR : { | |
1021 if (Bytes::is_Java_byte_ordering_different()) { | |
1022 WRITE_ARRAY(array, char, u2); | |
1023 } else { | |
1024 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
1025 } | |
1026 break; | |
1027 } | |
1028 case T_SHORT : { | |
1029 if (Bytes::is_Java_byte_ordering_different()) { | |
1030 WRITE_ARRAY(array, short, u2); | |
1031 } else { | |
1032 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
1033 } | |
1034 break; | |
1035 } | |
1036 case T_BOOLEAN : { | |
1037 if (Bytes::is_Java_byte_ordering_different()) { | |
1038 WRITE_ARRAY(array, bool, u1); | |
1039 } else { | |
1040 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
1041 } | |
1042 break; | |
1043 } | |
1044 case T_LONG : { | |
1045 if (Bytes::is_Java_byte_ordering_different()) { | |
1046 WRITE_ARRAY(array, long, u8); | |
1047 } else { | |
1048 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
1049 } | |
1050 break; | |
1051 } | |
1052 | |
1053 // handle float/doubles in a special value to ensure than NaNs are | |
1054 // written correctly. TO DO: Check if we can avoid this on processors that | |
1055 // use IEEE 754. | |
1056 | |
1057 case T_FLOAT : { | |
1058 for (int i=0; i<array->length(); i++) { | |
1059 dump_float( writer, array->float_at(i) ); | |
1060 } | |
1061 break; | |
1062 } | |
1063 case T_DOUBLE : { | |
1064 for (int i=0; i<array->length(); i++) { | |
1065 dump_double( writer, array->double_at(i) ); | |
1066 } | |
1067 break; | |
1068 } | |
1069 default : ShouldNotReachHere(); | |
1070 } | |
1071 } | |
1072 | |
1073 | |
1074 // Support class used to generate HPROF_UTF8 records from the entries in the | |
1075 // SymbolTable. | |
1076 | |
1077 class SymbolTableDumper : public OopClosure { | |
1078 private: | |
1079 DumpWriter* _writer; | |
1080 DumpWriter* writer() const { return _writer; } | |
1081 public: | |
1082 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
1083 void do_oop(oop* obj_p); | |
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1084 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1085 }; |
1086 | |
1087 void SymbolTableDumper::do_oop(oop* obj_p) { | |
1088 ResourceMark rm; | |
1089 symbolOop sym = (symbolOop)*obj_p; | |
1090 | |
1091 int len = sym->utf8_length(); | |
1092 if (len > 0) { | |
1093 char* s = sym->as_utf8(); | |
1094 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
1095 writer()->write_objectID(sym); | |
1096 writer()->write_raw(s, len); | |
1097 } | |
1098 } | |
1099 | |
1100 | |
1101 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
1102 | |
1103 class JNILocalsDumper : public OopClosure { | |
1104 private: | |
1105 DumpWriter* _writer; | |
1106 u4 _thread_serial_num; | |
1107 DumpWriter* writer() const { return _writer; } | |
1108 public: | |
1109 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
1110 _writer = writer; | |
1111 _thread_serial_num = thread_serial_num; | |
1112 } | |
1113 void do_oop(oop* obj_p); | |
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1114 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1115 }; |
1116 | |
1117 | |
1118 void JNILocalsDumper::do_oop(oop* obj_p) { | |
1119 // ignore null or deleted handles | |
1120 oop o = *obj_p; | |
1121 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
1122 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
1123 writer()->write_objectID(o); | |
1124 writer()->write_u4(_thread_serial_num); | |
1125 writer()->write_u4((u4)-1); // empty | |
1126 } | |
1127 } | |
1128 | |
1129 | |
1130 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
1131 | |
1132 class JNIGlobalsDumper : public OopClosure { | |
1133 private: | |
1134 DumpWriter* _writer; | |
1135 DumpWriter* writer() const { return _writer; } | |
1136 | |
1137 public: | |
1138 JNIGlobalsDumper(DumpWriter* writer) { | |
1139 _writer = writer; | |
1140 } | |
1141 void do_oop(oop* obj_p); | |
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1142 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1143 }; |
1144 | |
1145 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
1146 oop o = *obj_p; | |
1147 | |
1148 // ignore these | |
1149 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
1150 | |
1151 // we ignore global ref to symbols and other internal objects | |
1152 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
1153 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
1154 writer()->write_objectID(o); | |
1155 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
1156 } | |
1157 }; | |
1158 | |
1159 | |
1160 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
1161 | |
1162 class MonitorUsedDumper : public OopClosure { | |
1163 private: | |
1164 DumpWriter* _writer; | |
1165 DumpWriter* writer() const { return _writer; } | |
1166 public: | |
1167 MonitorUsedDumper(DumpWriter* writer) { | |
1168 _writer = writer; | |
1169 } | |
1170 void do_oop(oop* obj_p) { | |
1171 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
1172 writer()->write_objectID(*obj_p); | |
1173 } | |
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changeset
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1174 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1175 }; |
1176 | |
1177 | |
1178 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
1179 | |
1180 class StickyClassDumper : public OopClosure { | |
1181 private: | |
1182 DumpWriter* _writer; | |
1183 DumpWriter* writer() const { return _writer; } | |
1184 public: | |
1185 StickyClassDumper(DumpWriter* writer) { | |
1186 _writer = writer; | |
1187 } | |
1188 void do_oop(oop* obj_p); | |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
29
diff
changeset
|
1189 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1190 }; |
1191 | |
1192 void StickyClassDumper::do_oop(oop* obj_p) { | |
1193 if (*obj_p != NULL) { | |
1194 oop o = *obj_p; | |
1195 if (o->is_klass()) { | |
1196 klassOop k = klassOop(o); | |
1197 if (Klass::cast(k)->oop_is_instance()) { | |
1198 instanceKlass* ik = instanceKlass::cast(k); | |
1199 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); | |
1200 writer()->write_classID(ik); | |
1201 } | |
1202 } | |
1203 } | |
1204 } | |
1205 | |
1206 | |
1207 class VM_HeapDumper; | |
1208 | |
1209 // Support class using when iterating over the heap. | |
1210 | |
1211 class HeapObjectDumper : public ObjectClosure { | |
1212 private: | |
1213 VM_HeapDumper* _dumper; | |
1214 DumpWriter* _writer; | |
1215 | |
1216 VM_HeapDumper* dumper() { return _dumper; } | |
1217 DumpWriter* writer() { return _writer; } | |
1218 | |
1219 // used to indicate that a record has been writen | |
1220 void mark_end_of_record(); | |
1221 | |
1222 public: | |
1223 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
1224 _dumper = dumper; | |
1225 _writer = writer; | |
1226 } | |
1227 | |
1228 // called for each object in the heap | |
1229 void do_object(oop o); | |
1230 }; | |
1231 | |
1232 void HeapObjectDumper::do_object(oop o) { | |
1233 // hide the sentinel for deleted handles | |
1234 if (o == JNIHandles::deleted_handle()) return; | |
1235 | |
1236 // ignore KlassKlass objects | |
1237 if (o->is_klass()) return; | |
1238 | |
1239 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
1240 if (o->klass() == SystemDictionary::class_klass()) { | |
1241 if (!java_lang_Class::is_primitive(o)) { | |
1242 return; | |
1243 } | |
1244 } | |
1245 | |
1246 // create a HPROF_GC_INSTANCE record for each object | |
1247 if (o->is_instance()) { | |
1248 DumperSupport::dump_instance(writer(), o); | |
1249 mark_end_of_record(); | |
1250 } else { | |
1251 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
1252 if (o->is_objArray()) { | |
1253 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
1254 mark_end_of_record(); | |
1255 } else { | |
1256 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
1257 if (o->is_typeArray()) { | |
1258 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
1259 mark_end_of_record(); | |
1260 } | |
1261 } | |
1262 } | |
1263 } | |
1264 | |
1265 // The VM operation that performs the heap dump | |
1266 class VM_HeapDumper : public VM_GC_Operation { | |
1267 private: | |
1268 DumpWriter* _writer; | |
1269 bool _gc_before_heap_dump; | |
1270 bool _is_segmented_dump; | |
1271 jlong _dump_start; | |
1272 | |
1273 // accessors | |
1274 DumpWriter* writer() const { return _writer; } | |
1275 bool is_segmented_dump() const { return _is_segmented_dump; } | |
1276 void set_segmented_dump() { _is_segmented_dump = true; } | |
1277 jlong dump_start() const { return _dump_start; } | |
1278 void set_dump_start(jlong pos); | |
1279 | |
1280 bool skip_operation() const; | |
1281 | |
1282 // writes a HPROF_LOAD_CLASS record | |
1283 static void do_load_class(klassOop k); | |
1284 | |
1285 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
1286 // (and each array class too) | |
1287 static void do_class_dump(klassOop k); | |
1288 | |
1289 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1290 // array (and each multi-dimensional array too) | |
1291 static void do_basic_type_array_class_dump(klassOop k); | |
1292 | |
1293 // HPROF_GC_ROOT_THREAD_OBJ records | |
1294 void do_thread(JavaThread* thread, u4 thread_serial_num); | |
1295 void do_threads(); | |
1296 | |
1297 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
1298 void write_dump_header(); | |
1299 | |
1300 // fixes up the length of the current dump record | |
1301 void write_current_dump_record_length(); | |
1302 | |
1303 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1304 // record in the case of a segmented heap dump) | |
1305 void end_of_dump(); | |
1306 | |
1307 public: | |
1308 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump) : | |
1309 VM_GC_Operation(0 /* total collections, dummy, ignored */, | |
1310 0 /* total full collections, dummy, ignored */, | |
1311 gc_before_heap_dump) { | |
1312 _writer = writer; | |
1313 _gc_before_heap_dump = gc_before_heap_dump; | |
1314 _is_segmented_dump = false; | |
1315 _dump_start = (jlong)-1; | |
1316 } | |
1317 | |
1318 VMOp_Type type() const { return VMOp_HeapDumper; } | |
1319 // used to mark sub-record boundary | |
1320 void check_segment_length(); | |
1321 void doit(); | |
1322 }; | |
1323 | |
1324 bool VM_HeapDumper::skip_operation() const { | |
1325 return false; | |
1326 } | |
1327 | |
1328 // sets the dump starting position | |
1329 void VM_HeapDumper::set_dump_start(jlong pos) { | |
1330 _dump_start = pos; | |
1331 } | |
1332 | |
1333 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
1334 void VM_HeapDumper::write_dump_header() { | |
1335 if (writer()->is_open()) { | |
1336 if (is_segmented_dump()) { | |
1337 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
1338 } else { | |
1339 writer()->write_u1(HPROF_HEAP_DUMP); | |
1340 } | |
1341 writer()->write_u4(0); // current ticks | |
1342 | |
1343 // record the starting position for the dump (its length will be fixed up later) | |
1344 set_dump_start(writer()->current_offset()); | |
1345 writer()->write_u4(0); | |
1346 } | |
1347 } | |
1348 | |
1349 // fixes up the length of the current dump record | |
1350 void VM_HeapDumper::write_current_dump_record_length() { | |
1351 if (writer()->is_open()) { | |
1352 assert(dump_start() >= 0, "no dump start recorded"); | |
1353 | |
1354 // calculate the size of the dump record | |
1355 jlong dump_end = writer()->current_offset(); | |
1356 jlong dump_len = (dump_end - dump_start() - 4); | |
1357 | |
1358 // record length must fit in a u4 | |
1359 if (dump_len > (jlong)(4L*(jlong)G)) { | |
1360 warning("record is too large"); | |
1361 } | |
1362 | |
1363 // seek to the dump start and fix-up the length | |
1364 writer()->seek_to_offset(dump_start()); | |
1365 writer()->write_u4((u4)dump_len); | |
1366 | |
1367 // adjust the total size written to keep the bytes written correct. | |
1368 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
1369 | |
1370 // seek to dump end so we can continue | |
1371 writer()->seek_to_offset(dump_end); | |
1372 | |
1373 // no current dump record | |
1374 set_dump_start((jlong)-1); | |
1375 } | |
1376 } | |
1377 | |
1378 // used on a sub-record boundary to check if we need to start a | |
1379 // new segment. | |
1380 void VM_HeapDumper::check_segment_length() { | |
1381 if (writer()->is_open()) { | |
1382 if (is_segmented_dump()) { | |
1383 // don't use current_offset that would be too expensive on a per record basis | |
1384 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
1385 assert(dump_end == writer()->current_offset(), "checking"); | |
1386 jlong dump_len = (dump_end - dump_start() - 4); | |
1387 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
1388 | |
1389 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
1390 write_current_dump_record_length(); | |
1391 write_dump_header(); | |
1392 } | |
1393 } | |
1394 } | |
1395 } | |
1396 | |
1397 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1398 // record in the case of a segmented heap dump) | |
1399 void VM_HeapDumper::end_of_dump() { | |
1400 if (writer()->is_open()) { | |
1401 write_current_dump_record_length(); | |
1402 | |
1403 // for segmented dump we write the end record | |
1404 if (is_segmented_dump()) { | |
1405 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
1406 writer()->write_u4(0); | |
1407 writer()->write_u4(0); | |
1408 } | |
1409 } | |
1410 } | |
1411 | |
1412 // marks sub-record boundary | |
1413 void HeapObjectDumper::mark_end_of_record() { | |
1414 dumper()->check_segment_length(); | |
1415 } | |
1416 | |
1417 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
1418 // array classes) | |
1419 void VM_HeapDumper::do_load_class(klassOop k) { | |
1420 static u4 class_serial_num = 0; | |
1421 | |
1422 VM_HeapDumper* dumper = ((VM_HeapDumper*)VMThread::vm_operation()); | |
1423 DumpWriter* writer = dumper->writer(); | |
1424 | |
1425 // len of HPROF_LOAD_CLASS record | |
1426 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
1427 | |
1428 // write a HPROF_LOAD_CLASS for the class and each array class | |
1429 do { | |
1430 DumperSupport::write_header(writer, HPROF_LOAD_CLASS, remaining); | |
1431 | |
1432 // class serial number is just a number | |
1433 writer->write_u4(++class_serial_num); | |
1434 | |
1435 // class ID | |
1436 Klass* klass = Klass::cast(k); | |
1437 writer->write_classID(klass); | |
1438 | |
1439 writer->write_u4(STACK_TRACE_ID); | |
1440 | |
1441 // class name ID | |
1442 symbolOop name = klass->name(); | |
1443 writer->write_objectID(name); | |
1444 | |
1445 // write a LOAD_CLASS record for the array type (if it exists) | |
1446 k = klass->array_klass_or_null(); | |
1447 } while (k != NULL); | |
1448 } | |
1449 | |
1450 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
1451 void VM_HeapDumper::do_class_dump(klassOop k) { | |
1452 VM_HeapDumper* dumper = ((VM_HeapDumper*)VMThread::vm_operation()); | |
1453 DumpWriter* writer = dumper->writer(); | |
1454 DumperSupport::dump_class_and_array_classes(writer, k); | |
1455 } | |
1456 | |
1457 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1458 // array (and each multi-dimensional array too) | |
1459 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { | |
1460 VM_HeapDumper* dumper = ((VM_HeapDumper*)VMThread::vm_operation()); | |
1461 DumpWriter* writer = dumper->writer(); | |
1462 DumperSupport::dump_basic_type_array_class(writer, k); | |
1463 } | |
1464 | |
1465 // Walk the stack of the given thread. | |
1466 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
1467 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
1468 void VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { | |
1469 JNILocalsDumper blk(writer(), thread_serial_num); | |
1470 | |
1471 oop threadObj = java_thread->threadObj(); | |
1472 assert(threadObj != NULL, "sanity check"); | |
1473 | |
1474 // JNI locals for the top frame | |
1475 java_thread->active_handles()->oops_do(&blk); | |
1476 | |
1477 if (java_thread->has_last_Java_frame()) { | |
1478 | |
1479 // vframes are resource allocated | |
1480 Thread* current_thread = Thread::current(); | |
1481 ResourceMark rm(current_thread); | |
1482 HandleMark hm(current_thread); | |
1483 | |
1484 RegisterMap reg_map(java_thread); | |
1485 frame f = java_thread->last_frame(); | |
1486 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
1487 | |
1488 while (vf != NULL) { | |
1489 if (vf->is_java_frame()) { | |
1490 | |
1491 // java frame (interpreted, compiled, ...) | |
1492 javaVFrame *jvf = javaVFrame::cast(vf); | |
1493 | |
1494 if (!(jvf->method()->is_native())) { | |
1495 StackValueCollection* locals = jvf->locals(); | |
1496 for (int slot=0; slot<locals->size(); slot++) { | |
1497 if (locals->at(slot)->type() == T_OBJECT) { | |
1498 oop o = locals->obj_at(slot)(); | |
1499 | |
1500 if (o != NULL) { | |
1501 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
1502 writer()->write_objectID(o); | |
1503 writer()->write_u4(thread_serial_num); | |
1504 writer()->write_u4((u4)-1); // empty | |
1505 } | |
1506 } | |
1507 } | |
1508 } | |
1509 } else { | |
1510 | |
1511 // externalVFrame - if it's an entry frame then report any JNI locals | |
1512 // as roots | |
1513 frame* fr = vf->frame_pointer(); | |
1514 assert(fr != NULL, "sanity check"); | |
1515 if (fr->is_entry_frame()) { | |
1516 fr->entry_frame_call_wrapper()->handles()->oops_do(&blk); | |
1517 } | |
1518 } | |
1519 | |
1520 vf = vf->sender(); | |
1521 } | |
1522 } | |
1523 } | |
1524 | |
1525 | |
1526 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
1527 // the stack so that locals and JNI locals are dumped. | |
1528 void VM_HeapDumper::do_threads() { | |
1529 u4 thread_serial_num = 0; | |
1530 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { | |
1531 oop threadObj = thread->threadObj(); | |
1532 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { | |
1533 ++thread_serial_num; | |
1534 | |
1535 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); | |
1536 writer()->write_objectID(threadObj); | |
1537 writer()->write_u4(thread_serial_num); | |
1538 writer()->write_u4(STACK_TRACE_ID); | |
1539 | |
1540 do_thread(thread, thread_serial_num); | |
1541 } | |
1542 } | |
1543 } | |
1544 | |
1545 | |
1546 // The VM operation that dumps the heap. The dump consists of the following | |
1547 // records: | |
1548 // | |
1549 // HPROF_HEADER | |
1550 // HPROF_TRACE | |
1551 // [HPROF_UTF8]* | |
1552 // [HPROF_LOAD_CLASS]* | |
1553 // [HPROF_GC_CLASS_DUMP]* | |
1554 // HPROF_HEAP_DUMP | |
1555 // | |
1556 // The HPROF_TRACE record after the header is "dummy trace" record which does | |
1557 // not include any frames. Other records which require a stack trace ID will | |
1558 // specify the trace ID of this record (1). It also means we can run HAT without | |
1559 // needing the -stack false option. | |
1560 // | |
1561 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
1562 // the heap dump be generated in a single pass we remember the position of | |
1563 // the dump length and fix it up after all sub-records have been written. | |
1564 // To generate the sub-records we iterate over the heap, writing | |
1565 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
1566 // records as we go. Once that is done we write records for some of the GC | |
1567 // roots. | |
1568 | |
1569 void VM_HeapDumper::doit() { | |
1570 | |
1571 HandleMark hm; | |
1572 CollectedHeap* ch = Universe::heap(); | |
1573 if (_gc_before_heap_dump) { | |
1574 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
1575 } else { | |
1576 // make the heap parsable (no need to retire TLABs) | |
1577 ch->ensure_parsability(false); | |
1578 } | |
1579 | |
1580 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 | |
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diff
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1581 size_t used = ch->used(); |
0 | 1582 const char* header; |
1583 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
1584 set_segmented_dump(); | |
1585 header = "JAVA PROFILE 1.0.2"; | |
1586 } else { | |
1587 header = "JAVA PROFILE 1.0.1"; | |
1588 } | |
1589 // header is few bytes long - no chance to overflow int | |
1590 writer()->write_raw((void*)header, (int)strlen(header)); | |
1591 writer()->write_u1(0); // terminator | |
1592 writer()->write_u4(oopSize); | |
1593 writer()->write_u8(os::javaTimeMillis()); | |
1594 | |
1595 // HPROF_TRACE record without any frames | |
1596 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); | |
1597 writer()->write_u4(STACK_TRACE_ID); | |
1598 writer()->write_u4(0); // thread number | |
1599 writer()->write_u4(0); // frame count | |
1600 | |
1601 // HPROF_UTF8 records | |
1602 SymbolTableDumper sym_dumper(writer()); | |
1603 SymbolTable::oops_do(&sym_dumper); | |
1604 | |
1605 // write HPROF_LOAD_CLASS records | |
1606 SystemDictionary::classes_do(&do_load_class); | |
1607 Universe::basic_type_classes_do(&do_load_class); | |
1608 | |
1609 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT | |
1610 write_dump_header(); | |
1611 | |
1612 // Writes HPROF_GC_CLASS_DUMP records | |
1613 SystemDictionary::classes_do(&do_class_dump); | |
1614 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); | |
1615 check_segment_length(); | |
1616 | |
1617 // writes HPROF_GC_INSTANCE_DUMP records. | |
1618 // After each sub-record is written check_segment_length will be invoked. When | |
1619 // generated a segmented heap dump this allows us to check if the current | |
1620 // segment exceeds a threshold and if so, then a new segment is started. | |
1621 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
1622 // of the heap dump. | |
1623 HeapObjectDumper obj_dumper(this, writer()); | |
1624 Universe::heap()->object_iterate(&obj_dumper); | |
1625 | |
1626 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
1627 do_threads(); | |
1628 check_segment_length(); | |
1629 | |
1630 // HPROF_GC_ROOT_MONITOR_USED | |
1631 MonitorUsedDumper mon_dumper(writer()); | |
1632 ObjectSynchronizer::oops_do(&mon_dumper); | |
1633 check_segment_length(); | |
1634 | |
1635 // HPROF_GC_ROOT_JNI_GLOBAL | |
1636 JNIGlobalsDumper jni_dumper(writer()); | |
1637 JNIHandles::oops_do(&jni_dumper); | |
1638 check_segment_length(); | |
1639 | |
1640 // HPROF_GC_ROOT_STICKY_CLASS | |
1641 StickyClassDumper class_dumper(writer()); | |
1642 SystemDictionary::always_strong_oops_do(&class_dumper); | |
1643 | |
1644 // fixes up the length of the dump record. In the case of a segmented | |
1645 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
1646 end_of_dump(); | |
1647 } | |
1648 | |
1649 | |
1650 // dump the heap to given path. | |
1651 int HeapDumper::dump(const char* path) { | |
1652 assert(path != NULL && strlen(path) > 0, "path missing"); | |
1653 | |
1654 // print message in interactive case | |
1655 if (print_to_tty()) { | |
1656 tty->print_cr("Dumping heap to %s ...", path); | |
1657 timer()->start(); | |
1658 } | |
1659 | |
1660 // create the dump writer. If the file can be opened then bail | |
1661 DumpWriter writer(path); | |
1662 if (!writer.is_open()) { | |
1663 set_error(writer.error()); | |
1664 if (print_to_tty()) { | |
1665 tty->print_cr("Unable to create %s: %s", path, | |
1666 (error() != NULL) ? error() : "reason unknown"); | |
1667 } | |
1668 return -1; | |
1669 } | |
1670 | |
1671 // generate the dump | |
1672 VM_HeapDumper dumper(&writer, _gc_before_heap_dump); | |
1673 VMThread::execute(&dumper); | |
1674 | |
1675 // close dump file and record any error that the writer may have encountered | |
1676 writer.close(); | |
1677 set_error(writer.error()); | |
1678 | |
1679 // print message in interactive case | |
1680 if (print_to_tty()) { | |
1681 timer()->stop(); | |
1682 if (error() == NULL) { | |
1683 char msg[256]; | |
1684 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
1685 os::jlong_format_specifier(), timer()->seconds()); | |
1686 tty->print_cr(msg, writer.bytes_written()); | |
1687 } else { | |
1688 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
1689 } | |
1690 } | |
1691 | |
1692 return (writer.error() == NULL) ? 0 : -1; | |
1693 } | |
1694 | |
1695 // stop timer (if still active), and free any error string we might be holding | |
1696 HeapDumper::~HeapDumper() { | |
1697 if (timer()->is_active()) { | |
1698 timer()->stop(); | |
1699 } | |
1700 set_error(NULL); | |
1701 } | |
1702 | |
1703 | |
1704 // returns the error string (resource allocated), or NULL | |
1705 char* HeapDumper::error_as_C_string() const { | |
1706 if (error() != NULL) { | |
1707 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
1708 strcpy(str, error()); | |
1709 return str; | |
1710 } else { | |
1711 return NULL; | |
1712 } | |
1713 } | |
1714 | |
1715 // set the error string | |
1716 void HeapDumper::set_error(char* error) { | |
1717 if (_error != NULL) { | |
1718 os::free(_error); | |
1719 } | |
1720 if (error == NULL) { | |
1721 _error = NULL; | |
1722 } else { | |
1723 _error = os::strdup(error); | |
1724 assert(_error != NULL, "allocation failure"); | |
1725 } | |
1726 } | |
1727 | |
1728 | |
1729 // Called by error reporting | |
1730 void HeapDumper::dump_heap() { | |
1731 static char path[JVM_MAXPATHLEN]; | |
1732 | |
1733 // The dump file defaults to java_pid<pid>.hprof in the current working | |
1734 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
1735 // dump file name or a directory where dump file is created. | |
1736 bool use_default_filename = true; | |
1737 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { | |
1738 path[0] = '\0'; // HeapDumpPath=<file> not specified | |
1739 } else { | |
1740 assert(strlen(HeapDumpPath) < sizeof(path), "HeapDumpPath too long"); | |
1741 strcpy(path, HeapDumpPath); | |
1742 // check if the path is a directory (must exist) | |
1743 DIR* dir = os::opendir(path); | |
1744 if (dir == NULL) { | |
1745 use_default_filename = false; | |
1746 } else { | |
1747 // HeapDumpPath specified a directory. We append a file separator | |
1748 // (if needed). | |
1749 os::closedir(dir); | |
1750 size_t fs_len = strlen(os::file_separator()); | |
1751 if (strlen(path) >= fs_len) { | |
1752 char* end = path; | |
1753 end += (strlen(path) - fs_len); | |
1754 if (strcmp(end, os::file_separator()) != 0) { | |
1755 assert(strlen(path) + strlen(os::file_separator()) < sizeof(path), | |
1756 "HeapDumpPath too long"); | |
1757 strcat(path, os::file_separator()); | |
1758 } | |
1759 } | |
1760 } | |
1761 } | |
1762 // If HeapDumpPath wasn't a file name then we append the default name | |
1763 if (use_default_filename) { | |
1764 char fn[32]; | |
1765 sprintf(fn, "java_pid%d.hprof", os::current_process_id()); | |
1766 assert(strlen(path) + strlen(fn) < sizeof(path), "HeapDumpPath too long"); | |
1767 strcat(path, fn); | |
1768 } | |
1769 | |
1770 HeapDumper dumper(false /* no GC before heap dump */, | |
1771 true /* send to tty */); | |
1772 dumper.dump(path); | |
1773 } |