Mercurial > hg > graal-jvmci-8
annotate src/share/vm/services/heapDumper.cpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | f13e777eb255 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/symbolTable.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "gc_implementation/shared/vmGCOperations.hpp" | |
4076 | 30 #include "memory/gcLocker.inline.hpp" |
1972 | 31 #include "memory/genCollectedHeap.hpp" |
32 #include "memory/universe.hpp" | |
33 #include "oops/objArrayKlass.hpp" | |
34 #include "runtime/javaCalls.hpp" | |
35 #include "runtime/jniHandles.hpp" | |
36 #include "runtime/reflectionUtils.hpp" | |
37 #include "runtime/vframe.hpp" | |
38 #include "runtime/vmThread.hpp" | |
39 #include "runtime/vm_operations.hpp" | |
40 #include "services/heapDumper.hpp" | |
41 #include "services/threadService.hpp" | |
42 #include "utilities/ostream.hpp" | |
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43 #include "utilities/macros.hpp" |
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44 #if INCLUDE_ALL_GCS |
1972 | 45 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
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46 #endif // INCLUDE_ALL_GCS |
0 | 47 |
48 /* | |
49 * HPROF binary format - description copied from: | |
50 * src/share/demo/jvmti/hprof/hprof_io.c | |
51 * | |
52 * | |
53 * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" | |
54 * (0-terminated) | |
55 * | |
56 * u4 size of identifiers. Identifiers are used to represent | |
57 * UTF8 strings, objects, stack traces, etc. They usually | |
58 * have the same size as host pointers. For example, on | |
59 * Solaris and Win32, the size is 4. | |
60 * u4 high word | |
61 * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 | |
62 * [record]* a sequence of records. | |
63 * | |
64 * | |
65 * Record format: | |
66 * | |
67 * u1 a TAG denoting the type of the record | |
68 * u4 number of *microseconds* since the time stamp in the | |
69 * header. (wraps around in a little more than an hour) | |
70 * u4 number of bytes *remaining* in the record. Note that | |
71 * this number excludes the tag and the length field itself. | |
72 * [u1]* BODY of the record (a sequence of bytes) | |
73 * | |
74 * | |
75 * The following TAGs are supported: | |
76 * | |
77 * TAG BODY notes | |
78 *---------------------------------------------------------- | |
79 * HPROF_UTF8 a UTF8-encoded name | |
80 * | |
81 * id name ID | |
82 * [u1]* UTF8 characters (no trailing zero) | |
83 * | |
84 * HPROF_LOAD_CLASS a newly loaded class | |
85 * | |
86 * u4 class serial number (> 0) | |
87 * id class object ID | |
88 * u4 stack trace serial number | |
89 * id class name ID | |
90 * | |
91 * HPROF_UNLOAD_CLASS an unloading class | |
92 * | |
93 * u4 class serial_number | |
94 * | |
95 * HPROF_FRAME a Java stack frame | |
96 * | |
97 * id stack frame ID | |
98 * id method name ID | |
99 * id method signature ID | |
100 * id source file name ID | |
101 * u4 class serial number | |
102 * i4 line number. >0: normal | |
103 * -1: unknown | |
104 * -2: compiled method | |
105 * -3: native method | |
106 * | |
107 * HPROF_TRACE a Java stack trace | |
108 * | |
109 * u4 stack trace serial number | |
110 * u4 thread serial number | |
111 * u4 number of frames | |
112 * [id]* stack frame IDs | |
113 * | |
114 * | |
115 * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC | |
116 * | |
117 * u2 flags 0x0001: incremental vs. complete | |
118 * 0x0002: sorted by allocation vs. live | |
119 * 0x0004: whether to force a GC | |
120 * u4 cutoff ratio | |
121 * u4 total live bytes | |
122 * u4 total live instances | |
123 * u8 total bytes allocated | |
124 * u8 total instances allocated | |
125 * u4 number of sites that follow | |
126 * [u1 is_array: 0: normal object | |
127 * 2: object array | |
128 * 4: boolean array | |
129 * 5: char array | |
130 * 6: float array | |
131 * 7: double array | |
132 * 8: byte array | |
133 * 9: short array | |
134 * 10: int array | |
135 * 11: long array | |
136 * u4 class serial number (may be zero during startup) | |
137 * u4 stack trace serial number | |
138 * u4 number of bytes alive | |
139 * u4 number of instances alive | |
140 * u4 number of bytes allocated | |
141 * u4]* number of instance allocated | |
142 * | |
143 * HPROF_START_THREAD a newly started thread. | |
144 * | |
145 * u4 thread serial number (> 0) | |
146 * id thread object ID | |
147 * u4 stack trace serial number | |
148 * id thread name ID | |
149 * id thread group name ID | |
150 * id thread group parent name ID | |
151 * | |
152 * HPROF_END_THREAD a terminating thread. | |
153 * | |
154 * u4 thread serial number | |
155 * | |
156 * HPROF_HEAP_SUMMARY heap summary | |
157 * | |
158 * u4 total live bytes | |
159 * u4 total live instances | |
160 * u8 total bytes allocated | |
161 * u8 total instances allocated | |
162 * | |
163 * HPROF_HEAP_DUMP denote a heap dump | |
164 * | |
165 * [heap dump sub-records]* | |
166 * | |
167 * There are four kinds of heap dump sub-records: | |
168 * | |
169 * u1 sub-record type | |
170 * | |
171 * HPROF_GC_ROOT_UNKNOWN unknown root | |
172 * | |
173 * id object ID | |
174 * | |
175 * HPROF_GC_ROOT_THREAD_OBJ thread object | |
176 * | |
177 * id thread object ID (may be 0 for a | |
178 * thread newly attached through JNI) | |
179 * u4 thread sequence number | |
180 * u4 stack trace sequence number | |
181 * | |
182 * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root | |
183 * | |
184 * id object ID | |
185 * id JNI global ref ID | |
186 * | |
187 * HPROF_GC_ROOT_JNI_LOCAL JNI local ref | |
188 * | |
189 * id object ID | |
190 * u4 thread serial number | |
191 * u4 frame # in stack trace (-1 for empty) | |
192 * | |
193 * HPROF_GC_ROOT_JAVA_FRAME Java stack frame | |
194 * | |
195 * id object ID | |
196 * u4 thread serial number | |
197 * u4 frame # in stack trace (-1 for empty) | |
198 * | |
199 * HPROF_GC_ROOT_NATIVE_STACK Native stack | |
200 * | |
201 * id object ID | |
202 * u4 thread serial number | |
203 * | |
204 * HPROF_GC_ROOT_STICKY_CLASS System class | |
205 * | |
206 * id object ID | |
207 * | |
208 * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block | |
209 * | |
210 * id object ID | |
211 * u4 thread serial number | |
212 * | |
213 * HPROF_GC_ROOT_MONITOR_USED Busy monitor | |
214 * | |
215 * id object ID | |
216 * | |
217 * HPROF_GC_CLASS_DUMP dump of a class object | |
218 * | |
219 * id class object ID | |
220 * u4 stack trace serial number | |
221 * id super class object ID | |
222 * id class loader object ID | |
223 * id signers object ID | |
224 * id protection domain object ID | |
225 * id reserved | |
226 * id reserved | |
227 * | |
228 * u4 instance size (in bytes) | |
229 * | |
230 * u2 size of constant pool | |
231 * [u2, constant pool index, | |
232 * ty, type | |
233 * 2: object | |
234 * 4: boolean | |
235 * 5: char | |
236 * 6: float | |
237 * 7: double | |
238 * 8: byte | |
239 * 9: short | |
240 * 10: int | |
241 * 11: long | |
242 * vl]* and value | |
243 * | |
244 * u2 number of static fields | |
245 * [id, static field name, | |
246 * ty, type, | |
247 * vl]* and value | |
248 * | |
249 * u2 number of inst. fields (not inc. super) | |
250 * [id, instance field name, | |
251 * ty]* type | |
252 * | |
253 * HPROF_GC_INSTANCE_DUMP dump of a normal object | |
254 * | |
255 * id object ID | |
256 * u4 stack trace serial number | |
257 * id class object ID | |
258 * u4 number of bytes that follow | |
259 * [vl]* instance field values (class, followed | |
260 * by super, super's super ...) | |
261 * | |
262 * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array | |
263 * | |
264 * id array object ID | |
265 * u4 stack trace serial number | |
266 * u4 number of elements | |
267 * id array class ID | |
268 * [id]* elements | |
269 * | |
270 * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array | |
271 * | |
272 * id array object ID | |
273 * u4 stack trace serial number | |
274 * u4 number of elements | |
275 * u1 element type | |
276 * 4: boolean array | |
277 * 5: char array | |
278 * 6: float array | |
279 * 7: double array | |
280 * 8: byte array | |
281 * 9: short array | |
282 * 10: int array | |
283 * 11: long array | |
284 * [u1]* elements | |
285 * | |
286 * HPROF_CPU_SAMPLES a set of sample traces of running threads | |
287 * | |
288 * u4 total number of samples | |
289 * u4 # of traces | |
290 * [u4 # of samples | |
291 * u4]* stack trace serial number | |
292 * | |
293 * HPROF_CONTROL_SETTINGS the settings of on/off switches | |
294 * | |
295 * u4 0x00000001: alloc traces on/off | |
296 * 0x00000002: cpu sampling on/off | |
297 * u2 stack trace depth | |
298 * | |
299 * | |
300 * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally | |
301 * be generated as a sequence of heap dump segments. This sequence is | |
302 * terminated by an end record. The additional tags allowed by format | |
303 * "JAVA PROFILE 1.0.2" are: | |
304 * | |
305 * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment | |
306 * | |
307 * [heap dump sub-records]* | |
308 * The same sub-record types allowed by HPROF_HEAP_DUMP | |
309 * | |
310 * HPROF_HEAP_DUMP_END denotes the end of a heap dump | |
311 * | |
312 */ | |
313 | |
314 | |
315 // HPROF tags | |
316 | |
317 typedef enum { | |
318 // top-level records | |
319 HPROF_UTF8 = 0x01, | |
320 HPROF_LOAD_CLASS = 0x02, | |
321 HPROF_UNLOAD_CLASS = 0x03, | |
322 HPROF_FRAME = 0x04, | |
323 HPROF_TRACE = 0x05, | |
324 HPROF_ALLOC_SITES = 0x06, | |
325 HPROF_HEAP_SUMMARY = 0x07, | |
326 HPROF_START_THREAD = 0x0A, | |
327 HPROF_END_THREAD = 0x0B, | |
328 HPROF_HEAP_DUMP = 0x0C, | |
329 HPROF_CPU_SAMPLES = 0x0D, | |
330 HPROF_CONTROL_SETTINGS = 0x0E, | |
331 | |
332 // 1.0.2 record types | |
333 HPROF_HEAP_DUMP_SEGMENT = 0x1C, | |
334 HPROF_HEAP_DUMP_END = 0x2C, | |
335 | |
336 // field types | |
337 HPROF_ARRAY_OBJECT = 0x01, | |
338 HPROF_NORMAL_OBJECT = 0x02, | |
339 HPROF_BOOLEAN = 0x04, | |
340 HPROF_CHAR = 0x05, | |
341 HPROF_FLOAT = 0x06, | |
342 HPROF_DOUBLE = 0x07, | |
343 HPROF_BYTE = 0x08, | |
344 HPROF_SHORT = 0x09, | |
345 HPROF_INT = 0x0A, | |
346 HPROF_LONG = 0x0B, | |
347 | |
348 // data-dump sub-records | |
349 HPROF_GC_ROOT_UNKNOWN = 0xFF, | |
350 HPROF_GC_ROOT_JNI_GLOBAL = 0x01, | |
351 HPROF_GC_ROOT_JNI_LOCAL = 0x02, | |
352 HPROF_GC_ROOT_JAVA_FRAME = 0x03, | |
353 HPROF_GC_ROOT_NATIVE_STACK = 0x04, | |
354 HPROF_GC_ROOT_STICKY_CLASS = 0x05, | |
355 HPROF_GC_ROOT_THREAD_BLOCK = 0x06, | |
356 HPROF_GC_ROOT_MONITOR_USED = 0x07, | |
357 HPROF_GC_ROOT_THREAD_OBJ = 0x08, | |
358 HPROF_GC_CLASS_DUMP = 0x20, | |
359 HPROF_GC_INSTANCE_DUMP = 0x21, | |
360 HPROF_GC_OBJ_ARRAY_DUMP = 0x22, | |
361 HPROF_GC_PRIM_ARRAY_DUMP = 0x23 | |
362 } hprofTag; | |
363 | |
364 // Default stack trace ID (used for dummy HPROF_TRACE record) | |
365 enum { | |
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366 STACK_TRACE_ID = 1, |
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367 INITIAL_CLASS_COUNT = 200 |
0 | 368 }; |
369 | |
370 // Supports I/O operations on a dump file | |
371 | |
372 class DumpWriter : public StackObj { | |
373 private: | |
374 enum { | |
375 io_buffer_size = 8*M | |
376 }; | |
377 | |
378 int _fd; // file descriptor (-1 if dump file not open) | |
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379 julong _bytes_written; // number of byte written to dump file |
0 | 380 |
381 char* _buffer; // internal buffer | |
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382 size_t _size; |
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383 size_t _pos; |
0 | 384 |
385 char* _error; // error message when I/O fails | |
386 | |
387 void set_file_descriptor(int fd) { _fd = fd; } | |
388 int file_descriptor() const { return _fd; } | |
389 | |
390 char* buffer() const { return _buffer; } | |
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391 size_t buffer_size() const { return _size; } |
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392 size_t position() const { return _pos; } |
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393 void set_position(size_t pos) { _pos = pos; } |
0 | 394 |
395 void set_error(const char* error) { _error = (char*)os::strdup(error); } | |
396 | |
397 // all I/O go through this function | |
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398 void write_internal(void* s, size_t len); |
0 | 399 |
400 public: | |
401 DumpWriter(const char* path); | |
402 ~DumpWriter(); | |
403 | |
404 void close(); | |
405 bool is_open() const { return file_descriptor() >= 0; } | |
406 void flush(); | |
407 | |
408 // total number of bytes written to the disk | |
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409 julong bytes_written() const { return _bytes_written; } |
0 | 410 |
411 // adjust the number of bytes written to disk (used to keep the count | |
412 // of the number of bytes written in case of rewrites) | |
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413 void adjust_bytes_written(jlong n) { _bytes_written += n; } |
0 | 414 |
415 // number of (buffered) bytes as yet unwritten to the dump file | |
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416 size_t bytes_unwritten() const { return position(); } |
0 | 417 |
418 char* error() const { return _error; } | |
419 | |
420 jlong current_offset(); | |
421 void seek_to_offset(jlong pos); | |
422 | |
423 // writer functions | |
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424 void write_raw(void* s, size_t len); |
0 | 425 void write_u1(u1 x) { write_raw((void*)&x, 1); } |
426 void write_u2(u2 x); | |
427 void write_u4(u4 x); | |
428 void write_u8(u8 x); | |
429 void write_objectID(oop o); | |
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430 void write_symbolID(Symbol* o); |
0 | 431 void write_classID(Klass* k); |
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432 void write_id(u4 x); |
0 | 433 }; |
434 | |
435 DumpWriter::DumpWriter(const char* path) { | |
436 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
437 // sufficient memory then reduce size until we can allocate something. | |
438 _size = io_buffer_size; | |
439 do { | |
6197 | 440 _buffer = (char*)os::malloc(_size, mtInternal); |
0 | 441 if (_buffer == NULL) { |
442 _size = _size >> 1; | |
443 } | |
444 } while (_buffer == NULL && _size > 0); | |
445 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
446 _pos = 0; | |
447 _error = NULL; | |
448 _bytes_written = 0L; | |
449 _fd = os::create_binary_file(path, false); // don't replace existing file | |
450 | |
451 // if the open failed we record the error | |
452 if (_fd < 0) { | |
453 _error = (char*)os::strdup(strerror(errno)); | |
454 } | |
455 } | |
456 | |
457 DumpWriter::~DumpWriter() { | |
458 // flush and close dump file | |
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459 if (is_open()) { |
0 | 460 close(); |
461 } | |
462 if (_buffer != NULL) os::free(_buffer); | |
463 if (_error != NULL) os::free(_error); | |
464 } | |
465 | |
466 // closes dump file (if open) | |
467 void DumpWriter::close() { | |
468 // flush and close dump file | |
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469 if (is_open()) { |
0 | 470 flush(); |
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471 ::close(file_descriptor()); |
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472 set_file_descriptor(-1); |
0 | 473 } |
474 } | |
475 | |
476 // write directly to the file | |
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477 void DumpWriter::write_internal(void* s, size_t len) { |
0 | 478 if (is_open()) { |
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479 const char* pos = (char*)s; |
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480 ssize_t n = 0; |
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481 while (len > 0) { |
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482 uint tmp = (uint)MIN2(len, (size_t)UINT_MAX); |
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483 n = ::write(file_descriptor(), pos, tmp); |
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484 |
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485 if (n < 0) { |
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486 set_error(strerror(errno)); |
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487 ::close(file_descriptor()); |
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488 set_file_descriptor(-1); |
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489 return; |
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490 } |
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491 |
0 | 492 _bytes_written += n; |
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493 pos += n; |
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494 len -= n; |
0 | 495 } |
496 } | |
497 } | |
498 | |
499 // write raw bytes | |
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500 void DumpWriter::write_raw(void* s, size_t len) { |
0 | 501 if (is_open()) { |
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502 // flush buffer to make room |
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503 if ((position() + len) >= buffer_size()) { |
0 | 504 flush(); |
505 } | |
506 | |
507 // buffer not available or too big to buffer it | |
508 if ((buffer() == NULL) || (len >= buffer_size())) { | |
509 write_internal(s, len); | |
510 } else { | |
511 // Should optimize this for u1/u2/u4/u8 sizes. | |
512 memcpy(buffer() + position(), s, len); | |
513 set_position(position() + len); | |
514 } | |
515 } | |
516 } | |
517 | |
518 // flush any buffered bytes to the file | |
519 void DumpWriter::flush() { | |
520 if (is_open() && position() > 0) { | |
521 write_internal(buffer(), position()); | |
522 set_position(0); | |
523 } | |
524 } | |
525 | |
526 jlong DumpWriter::current_offset() { | |
527 if (is_open()) { | |
528 // the offset is the file offset plus whatever we have buffered | |
529 jlong offset = os::current_file_offset(file_descriptor()); | |
530 assert(offset >= 0, "lseek failed"); | |
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531 return offset + position(); |
0 | 532 } else { |
533 return (jlong)-1; | |
534 } | |
535 } | |
536 | |
537 void DumpWriter::seek_to_offset(jlong off) { | |
538 assert(off >= 0, "bad offset"); | |
539 | |
540 // need to flush before seeking | |
541 flush(); | |
542 | |
543 // may be closed due to I/O error | |
544 if (is_open()) { | |
545 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
546 assert(n >= 0, "lseek failed"); | |
547 } | |
548 } | |
549 | |
550 void DumpWriter::write_u2(u2 x) { | |
551 u2 v; | |
552 Bytes::put_Java_u2((address)&v, x); | |
553 write_raw((void*)&v, 2); | |
554 } | |
555 | |
556 void DumpWriter::write_u4(u4 x) { | |
557 u4 v; | |
558 Bytes::put_Java_u4((address)&v, x); | |
559 write_raw((void*)&v, 4); | |
560 } | |
561 | |
562 void DumpWriter::write_u8(u8 x) { | |
563 u8 v; | |
564 Bytes::put_Java_u8((address)&v, x); | |
565 write_raw((void*)&v, 8); | |
566 } | |
567 | |
568 void DumpWriter::write_objectID(oop o) { | |
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569 address a = (address)o; |
0 | 570 #ifdef _LP64 |
571 write_u8((u8)a); | |
572 #else | |
573 write_u4((u4)a); | |
574 #endif | |
575 } | |
576 | |
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577 void DumpWriter::write_symbolID(Symbol* s) { |
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578 address a = (address)((uintptr_t)s); |
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579 #ifdef _LP64 |
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580 write_u8((u8)a); |
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581 #else |
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582 write_u4((u4)a); |
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583 #endif |
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584 } |
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585 |
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586 void DumpWriter::write_id(u4 x) { |
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587 #ifdef _LP64 |
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588 write_u8((u8) x); |
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589 #else |
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590 write_u4(x); |
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591 #endif |
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592 } |
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593 |
0 | 594 // We use java mirror as the class ID |
595 void DumpWriter::write_classID(Klass* k) { | |
596 write_objectID(k->java_mirror()); | |
597 } | |
598 | |
599 | |
600 | |
601 // Support class with a collection of functions used when dumping the heap | |
602 | |
603 class DumperSupport : AllStatic { | |
604 public: | |
605 | |
606 // write a header of the given type | |
607 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
608 | |
609 // returns hprof tag for the given type signature | |
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610 static hprofTag sig2tag(Symbol* sig); |
0 | 611 // returns hprof tag for the given basic type |
612 static hprofTag type2tag(BasicType type); | |
613 | |
614 // returns the size of the instance of the given class | |
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615 static u4 instance_size(Klass* k); |
0 | 616 |
617 // dump a jfloat | |
618 static void dump_float(DumpWriter* writer, jfloat f); | |
619 // dump a jdouble | |
620 static void dump_double(DumpWriter* writer, jdouble d); | |
621 // dumps the raw value of the given field | |
622 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
623 // dumps static fields of the given class | |
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624 static void dump_static_fields(DumpWriter* writer, Klass* k); |
0 | 625 // dump the raw values of the instance fields of the given object |
626 static void dump_instance_fields(DumpWriter* writer, oop o); | |
627 // dumps the definition of the instance fields for a given class | |
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628 static void dump_instance_field_descriptors(DumpWriter* writer, Klass* k); |
0 | 629 // creates HPROF_GC_INSTANCE_DUMP record for the given object |
630 static void dump_instance(DumpWriter* writer, oop o); | |
631 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
632 // array classes | |
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633 static void dump_class_and_array_classes(DumpWriter* writer, Klass* k); |
0 | 634 // creates HPROF_GC_CLASS_DUMP record for a given primitive array |
635 // class (and each multi-dimensional array class too) | |
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636 static void dump_basic_type_array_class(DumpWriter* writer, Klass* k); |
0 | 637 |
638 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
639 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
640 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
641 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
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642 // create HPROF_FRAME record for the given method and bci |
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643 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, Method* m, int bci); |
0 | 644 }; |
645 | |
646 // write a header of the given type | |
647 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
648 writer->write_u1((u1)tag); | |
649 writer->write_u4(0); // current ticks | |
650 writer->write_u4(len); | |
651 } | |
652 | |
653 // returns hprof tag for the given type signature | |
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654 hprofTag DumperSupport::sig2tag(Symbol* sig) { |
0 | 655 switch (sig->byte_at(0)) { |
656 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
657 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
658 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
659 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
660 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
661 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
662 case JVM_SIGNATURE_INT : return HPROF_INT; | |
663 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
664 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
665 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
666 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
667 } | |
668 } | |
669 | |
670 hprofTag DumperSupport::type2tag(BasicType type) { | |
671 switch (type) { | |
672 case T_BYTE : return HPROF_BYTE; | |
673 case T_CHAR : return HPROF_CHAR; | |
674 case T_FLOAT : return HPROF_FLOAT; | |
675 case T_DOUBLE : return HPROF_DOUBLE; | |
676 case T_INT : return HPROF_INT; | |
677 case T_LONG : return HPROF_LONG; | |
678 case T_SHORT : return HPROF_SHORT; | |
679 case T_BOOLEAN : return HPROF_BOOLEAN; | |
680 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
681 } | |
682 } | |
683 | |
684 // dump a jfloat | |
685 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
686 if (g_isnan(f)) { | |
687 writer->write_u4(0x7fc00000); // collapsing NaNs | |
688 } else { | |
689 union { | |
690 int i; | |
691 float f; | |
692 } u; | |
693 u.f = (float)f; | |
694 writer->write_u4((u4)u.i); | |
695 } | |
696 } | |
697 | |
698 // dump a jdouble | |
699 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
700 union { | |
701 jlong l; | |
702 double d; | |
703 } u; | |
704 if (g_isnan(d)) { // collapsing NaNs | |
705 u.l = (jlong)(0x7ff80000); | |
706 u.l = (u.l << 32); | |
707 } else { | |
708 u.d = (double)d; | |
709 } | |
710 writer->write_u8((u8)u.l); | |
711 } | |
712 | |
713 // dumps the raw value of the given field | |
714 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
715 switch (type) { | |
716 case JVM_SIGNATURE_CLASS : | |
717 case JVM_SIGNATURE_ARRAY : { | |
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718 oop o; |
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719 if (UseCompressedOops) { |
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720 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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721 } else { |
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722 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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723 } |
0 | 724 |
725 // reflection and sun.misc.Unsafe classes may have a reference to a | |
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726 // Klass* so filter it out. |
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727 assert(o->is_oop_or_null(), "should always be an oop"); |
0 | 728 writer->write_objectID(o); |
729 break; | |
730 } | |
731 case JVM_SIGNATURE_BYTE : { | |
732 jbyte* b = (jbyte*)addr; | |
733 writer->write_u1((u1)*b); | |
734 break; | |
735 } | |
736 case JVM_SIGNATURE_CHAR : { | |
737 jchar* c = (jchar*)addr; | |
738 writer->write_u2((u2)*c); | |
739 break; | |
740 } | |
741 case JVM_SIGNATURE_SHORT : { | |
742 jshort* s = (jshort*)addr; | |
743 writer->write_u2((u2)*s); | |
744 break; | |
745 } | |
746 case JVM_SIGNATURE_FLOAT : { | |
747 jfloat* f = (jfloat*)addr; | |
748 dump_float(writer, *f); | |
749 break; | |
750 } | |
751 case JVM_SIGNATURE_DOUBLE : { | |
752 jdouble* f = (jdouble*)addr; | |
753 dump_double(writer, *f); | |
754 break; | |
755 } | |
756 case JVM_SIGNATURE_INT : { | |
757 jint* i = (jint*)addr; | |
758 writer->write_u4((u4)*i); | |
759 break; | |
760 } | |
761 case JVM_SIGNATURE_LONG : { | |
762 jlong* l = (jlong*)addr; | |
763 writer->write_u8((u8)*l); | |
764 break; | |
765 } | |
766 case JVM_SIGNATURE_BOOLEAN : { | |
767 jboolean* b = (jboolean*)addr; | |
768 writer->write_u1((u1)*b); | |
769 break; | |
770 } | |
771 default : ShouldNotReachHere(); | |
772 } | |
773 } | |
774 | |
775 // returns the size of the instance of the given class | |
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776 u4 DumperSupport::instance_size(Klass* k) { |
0 | 777 HandleMark hm; |
778 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
779 | |
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780 u4 size = 0; |
0 | 781 |
782 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
783 if (!fld.access_flags().is_static()) { | |
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784 Symbol* sig = fld.signature(); |
0 | 785 switch (sig->byte_at(0)) { |
786 case JVM_SIGNATURE_CLASS : | |
787 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
788 | |
789 case JVM_SIGNATURE_BYTE : | |
790 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
791 | |
792 case JVM_SIGNATURE_CHAR : | |
793 case JVM_SIGNATURE_SHORT : size += 2; break; | |
794 | |
795 case JVM_SIGNATURE_INT : | |
796 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
797 | |
798 case JVM_SIGNATURE_LONG : | |
799 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
800 | |
801 default : ShouldNotReachHere(); | |
802 } | |
803 } | |
804 } | |
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805 return size; |
0 | 806 } |
807 | |
808 // dumps static fields of the given class | |
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809 void DumperSupport::dump_static_fields(DumpWriter* writer, Klass* k) { |
0 | 810 HandleMark hm; |
811 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
812 | |
813 // pass 1 - count the static fields | |
814 u2 field_count = 0; | |
815 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
816 if (fldc.access_flags().is_static()) field_count++; | |
817 } | |
818 | |
819 writer->write_u2(field_count); | |
820 | |
821 // pass 2 - dump the field descriptors and raw values | |
822 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
823 if (fld.access_flags().is_static()) { | |
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824 Symbol* sig = fld.signature(); |
0 | 825 |
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826 writer->write_symbolID(fld.name()); // name |
0 | 827 writer->write_u1(sig2tag(sig)); // type |
828 | |
829 // value | |
830 int offset = fld.offset(); | |
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831 address addr = (address)ikh->java_mirror() + offset; |
0 | 832 |
833 dump_field_value(writer, sig->byte_at(0), addr); | |
834 } | |
835 } | |
836 } | |
837 | |
838 // dump the raw values of the instance fields of the given object | |
839 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
840 HandleMark hm; | |
841 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
842 | |
843 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
844 if (!fld.access_flags().is_static()) { | |
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845 Symbol* sig = fld.signature(); |
0 | 846 address addr = (address)o + fld.offset(); |
847 | |
848 dump_field_value(writer, sig->byte_at(0), addr); | |
849 } | |
850 } | |
851 } | |
852 | |
853 // dumps the definition of the instance fields for a given class | |
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854 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, Klass* k) { |
0 | 855 HandleMark hm; |
856 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
857 | |
858 // pass 1 - count the instance fields | |
859 u2 field_count = 0; | |
860 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
861 if (!fldc.access_flags().is_static()) field_count++; | |
862 } | |
863 | |
864 writer->write_u2(field_count); | |
865 | |
866 // pass 2 - dump the field descriptors | |
867 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
868 if (!fld.access_flags().is_static()) { | |
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869 Symbol* sig = fld.signature(); |
0 | 870 |
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871 writer->write_symbolID(fld.name()); // name |
0 | 872 writer->write_u1(sig2tag(sig)); // type |
873 } | |
874 } | |
875 } | |
876 | |
877 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
878 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
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879 Klass* k = o->klass(); |
0 | 880 |
881 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
882 writer->write_objectID(o); | |
883 writer->write_u4(STACK_TRACE_ID); | |
884 | |
885 // class ID | |
6983 | 886 writer->write_classID(k); |
0 | 887 |
888 // number of bytes that follow | |
889 writer->write_u4(instance_size(k) ); | |
890 | |
891 // field values | |
892 dump_instance_fields(writer, o); | |
893 } | |
894 | |
895 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
896 // its array classes | |
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897 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, Klass* k) { |
6983 | 898 Klass* klass = k; |
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899 assert(klass->oop_is_instance(), "not an InstanceKlass"); |
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900 InstanceKlass* ik = (InstanceKlass*)klass; |
0 | 901 |
902 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
903 | |
904 // class ID | |
905 writer->write_classID(ik); | |
906 writer->write_u4(STACK_TRACE_ID); | |
907 | |
908 // super class ID | |
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909 Klass* java_super = ik->java_super(); |
0 | 910 if (java_super == NULL) { |
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911 writer->write_objectID(oop(NULL)); |
0 | 912 } else { |
6983 | 913 writer->write_classID(java_super); |
0 | 914 } |
915 | |
916 writer->write_objectID(ik->class_loader()); | |
917 writer->write_objectID(ik->signers()); | |
918 writer->write_objectID(ik->protection_domain()); | |
919 | |
920 // reserved | |
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921 writer->write_objectID(oop(NULL)); |
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922 writer->write_objectID(oop(NULL)); |
0 | 923 |
924 // instance size | |
925 writer->write_u4(DumperSupport::instance_size(k)); | |
926 | |
927 // size of constant pool - ignored by HAT 1.1 | |
928 writer->write_u2(0); | |
929 | |
930 // number of static fields | |
931 dump_static_fields(writer, k); | |
932 | |
933 // description of instance fields | |
934 dump_instance_field_descriptors(writer, k); | |
935 | |
936 // array classes | |
937 k = klass->array_klass_or_null(); | |
938 while (k != NULL) { | |
6983 | 939 Klass* klass = k; |
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940 assert(klass->oop_is_objArray(), "not an ObjArrayKlass"); |
0 | 941 |
942 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
943 writer->write_classID(klass); | |
944 writer->write_u4(STACK_TRACE_ID); | |
945 | |
946 // super class of array classes is java.lang.Object | |
947 java_super = klass->java_super(); | |
948 assert(java_super != NULL, "checking"); | |
6983 | 949 writer->write_classID(java_super); |
0 | 950 |
951 writer->write_objectID(ik->class_loader()); | |
952 writer->write_objectID(ik->signers()); | |
953 writer->write_objectID(ik->protection_domain()); | |
954 | |
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955 writer->write_objectID(oop(NULL)); // reserved |
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956 writer->write_objectID(oop(NULL)); |
0 | 957 writer->write_u4(0); // instance size |
958 writer->write_u2(0); // constant pool | |
959 writer->write_u2(0); // static fields | |
960 writer->write_u2(0); // instance fields | |
961 | |
962 // get the array class for the next rank | |
963 k = klass->array_klass_or_null(); | |
964 } | |
965 } | |
966 | |
967 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
968 // class (and each multi-dimensional array class too) | |
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969 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, Klass* k) { |
0 | 970 // array classes |
971 while (k != NULL) { | |
6983 | 972 Klass* klass = k; |
0 | 973 |
974 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
975 writer->write_classID(klass); | |
976 writer->write_u4(STACK_TRACE_ID); | |
977 | |
978 // super class of array classes is java.lang.Object | |
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979 Klass* java_super = klass->java_super(); |
0 | 980 assert(java_super != NULL, "checking"); |
6983 | 981 writer->write_classID(java_super); |
0 | 982 |
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983 writer->write_objectID(oop(NULL)); // loader |
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984 writer->write_objectID(oop(NULL)); // signers |
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985 writer->write_objectID(oop(NULL)); // protection domain |
0 | 986 |
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987 writer->write_objectID(oop(NULL)); // reserved |
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988 writer->write_objectID(oop(NULL)); |
0 | 989 writer->write_u4(0); // instance size |
990 writer->write_u2(0); // constant pool | |
991 writer->write_u2(0); // static fields | |
992 writer->write_u2(0); // instance fields | |
993 | |
994 // get the array class for the next rank | |
995 k = klass->array_klass_or_null(); | |
996 } | |
997 } | |
998 | |
999 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
1000 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
1001 | |
1002 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
1003 writer->write_objectID(array); | |
1004 writer->write_u4(STACK_TRACE_ID); | |
1005 writer->write_u4((u4)array->length()); | |
1006 | |
1007 // array class ID | |
6983 | 1008 writer->write_classID(array->klass()); |
0 | 1009 |
1010 // [id]* elements | |
1011 for (int index=0; index<array->length(); index++) { | |
1012 oop o = array->obj_at(index); | |
1013 writer->write_objectID(o); | |
1014 } | |
1015 } | |
1016 | |
1017 #define WRITE_ARRAY(Array, Type, Size) \ | |
1018 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
1019 | |
1020 | |
1021 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
1022 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
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1023 BasicType type = TypeArrayKlass::cast(array->klass())->element_type(); |
0 | 1024 |
1025 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
1026 writer->write_objectID(array); | |
1027 writer->write_u4(STACK_TRACE_ID); | |
1028 writer->write_u4((u4)array->length()); | |
1029 writer->write_u1(type2tag(type)); | |
1030 | |
1031 // nothing to copy | |
1032 if (array->length() == 0) { | |
1033 return; | |
1034 } | |
1035 | |
1036 // If the byte ordering is big endian then we can copy most types directly | |
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1037 u4 length_in_bytes = (u4)array->length() * type2aelembytes(type); |
0 | 1038 |
1039 switch (type) { | |
1040 case T_INT : { | |
1041 if (Bytes::is_Java_byte_ordering_different()) { | |
1042 WRITE_ARRAY(array, int, u4); | |
1043 } else { | |
1044 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
1045 } | |
1046 break; | |
1047 } | |
1048 case T_BYTE : { | |
1049 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
1050 break; | |
1051 } | |
1052 case T_CHAR : { | |
1053 if (Bytes::is_Java_byte_ordering_different()) { | |
1054 WRITE_ARRAY(array, char, u2); | |
1055 } else { | |
1056 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
1057 } | |
1058 break; | |
1059 } | |
1060 case T_SHORT : { | |
1061 if (Bytes::is_Java_byte_ordering_different()) { | |
1062 WRITE_ARRAY(array, short, u2); | |
1063 } else { | |
1064 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
1065 } | |
1066 break; | |
1067 } | |
1068 case T_BOOLEAN : { | |
1069 if (Bytes::is_Java_byte_ordering_different()) { | |
1070 WRITE_ARRAY(array, bool, u1); | |
1071 } else { | |
1072 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
1073 } | |
1074 break; | |
1075 } | |
1076 case T_LONG : { | |
1077 if (Bytes::is_Java_byte_ordering_different()) { | |
1078 WRITE_ARRAY(array, long, u8); | |
1079 } else { | |
1080 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
1081 } | |
1082 break; | |
1083 } | |
1084 | |
1085 // handle float/doubles in a special value to ensure than NaNs are | |
1086 // written correctly. TO DO: Check if we can avoid this on processors that | |
1087 // use IEEE 754. | |
1088 | |
1089 case T_FLOAT : { | |
1090 for (int i=0; i<array->length(); i++) { | |
1091 dump_float( writer, array->float_at(i) ); | |
1092 } | |
1093 break; | |
1094 } | |
1095 case T_DOUBLE : { | |
1096 for (int i=0; i<array->length(); i++) { | |
1097 dump_double( writer, array->double_at(i) ); | |
1098 } | |
1099 break; | |
1100 } | |
1101 default : ShouldNotReachHere(); | |
1102 } | |
1103 } | |
1104 | |
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1105 // create a HPROF_FRAME record of the given Method* and bci |
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1106 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1107 int frame_serial_num, |
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1108 int class_serial_num, |
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1109 Method* m, |
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1110 int bci) { |
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1111 int line_number; |
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1112 if (m->is_native()) { |
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1113 line_number = -3; // native frame |
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1114 } else { |
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1115 line_number = m->line_number_from_bci(bci); |
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1116 } |
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1117 |
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1118 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1119 writer->write_id(frame_serial_num); // frame serial number |
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1120 writer->write_symbolID(m->name()); // method's name |
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1121 writer->write_symbolID(m->signature()); // method's signature |
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1122 |
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1123 assert(m->method_holder()->oop_is_instance(), "not InstanceKlass"); |
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1124 writer->write_symbolID(m->method_holder()->source_file_name()); // source file name |
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1125 writer->write_u4(class_serial_num); // class serial number |
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1126 writer->write_u4((u4) line_number); // line number |
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1127 } |
0 | 1128 |
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1129 |
0 | 1130 // Support class used to generate HPROF_UTF8 records from the entries in the |
1131 // SymbolTable. | |
1132 | |
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1133 class SymbolTableDumper : public SymbolClosure { |
0 | 1134 private: |
1135 DumpWriter* _writer; | |
1136 DumpWriter* writer() const { return _writer; } | |
1137 public: | |
1138 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
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1139 void do_symbol(Symbol** p); |
0 | 1140 }; |
1141 | |
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1142 void SymbolTableDumper::do_symbol(Symbol** p) { |
0 | 1143 ResourceMark rm; |
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1144 Symbol* sym = load_symbol(p); |
0 | 1145 int len = sym->utf8_length(); |
1146 if (len > 0) { | |
1147 char* s = sym->as_utf8(); | |
1148 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
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1149 writer()->write_symbolID(sym); |
0 | 1150 writer()->write_raw(s, len); |
1151 } | |
1152 } | |
1153 | |
1154 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
1155 | |
1156 class JNILocalsDumper : public OopClosure { | |
1157 private: | |
1158 DumpWriter* _writer; | |
1159 u4 _thread_serial_num; | |
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1160 int _frame_num; |
0 | 1161 DumpWriter* writer() const { return _writer; } |
1162 public: | |
1163 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
1164 _writer = writer; | |
1165 _thread_serial_num = thread_serial_num; | |
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1166 _frame_num = -1; // default - empty stack |
0 | 1167 } |
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1168 void set_frame_number(int n) { _frame_num = n; } |
0 | 1169 void do_oop(oop* obj_p); |
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1170 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1171 }; |
1172 | |
1173 | |
1174 void JNILocalsDumper::do_oop(oop* obj_p) { | |
1175 // ignore null or deleted handles | |
1176 oop o = *obj_p; | |
1177 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
1178 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
1179 writer()->write_objectID(o); | |
1180 writer()->write_u4(_thread_serial_num); | |
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1181 writer()->write_u4((u4)_frame_num); |
0 | 1182 } |
1183 } | |
1184 | |
1185 | |
1186 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
1187 | |
1188 class JNIGlobalsDumper : public OopClosure { | |
1189 private: | |
1190 DumpWriter* _writer; | |
1191 DumpWriter* writer() const { return _writer; } | |
1192 | |
1193 public: | |
1194 JNIGlobalsDumper(DumpWriter* writer) { | |
1195 _writer = writer; | |
1196 } | |
1197 void do_oop(oop* obj_p); | |
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1198 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1199 }; |
1200 | |
1201 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
1202 oop o = *obj_p; | |
1203 | |
1204 // ignore these | |
1205 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
1206 | |
1207 // we ignore global ref to symbols and other internal objects | |
1208 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
1209 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
1210 writer()->write_objectID(o); | |
1211 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
1212 } | |
1213 }; | |
1214 | |
1215 | |
1216 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
1217 | |
1218 class MonitorUsedDumper : public OopClosure { | |
1219 private: | |
1220 DumpWriter* _writer; | |
1221 DumpWriter* writer() const { return _writer; } | |
1222 public: | |
1223 MonitorUsedDumper(DumpWriter* writer) { | |
1224 _writer = writer; | |
1225 } | |
1226 void do_oop(oop* obj_p) { | |
1227 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
1228 writer()->write_objectID(*obj_p); | |
1229 } | |
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1230 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
0 | 1231 }; |
1232 | |
1233 | |
1234 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
1235 | |
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1236 class StickyClassDumper : public KlassClosure { |
0 | 1237 private: |
1238 DumpWriter* _writer; | |
1239 DumpWriter* writer() const { return _writer; } | |
1240 public: | |
1241 StickyClassDumper(DumpWriter* writer) { | |
1242 _writer = writer; | |
1243 } | |
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1244 void do_klass(Klass* k) { |
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1245 if (k->oop_is_instance()) { |
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1246 InstanceKlass* ik = InstanceKlass::cast(k); |
0 | 1247 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); |
1248 writer()->write_classID(ik); | |
1249 } | |
1250 } | |
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1251 }; |
0 | 1252 |
1253 | |
1254 class VM_HeapDumper; | |
1255 | |
1256 // Support class using when iterating over the heap. | |
1257 | |
1258 class HeapObjectDumper : public ObjectClosure { | |
1259 private: | |
1260 VM_HeapDumper* _dumper; | |
1261 DumpWriter* _writer; | |
1262 | |
1263 VM_HeapDumper* dumper() { return _dumper; } | |
1264 DumpWriter* writer() { return _writer; } | |
1265 | |
1266 // used to indicate that a record has been writen | |
1267 void mark_end_of_record(); | |
1268 | |
1269 public: | |
1270 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
1271 _dumper = dumper; | |
1272 _writer = writer; | |
1273 } | |
1274 | |
1275 // called for each object in the heap | |
1276 void do_object(oop o); | |
1277 }; | |
1278 | |
1279 void HeapObjectDumper::do_object(oop o) { | |
1280 // hide the sentinel for deleted handles | |
1281 if (o == JNIHandles::deleted_handle()) return; | |
1282 | |
1283 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
1142 | 1284 if (o->klass() == SystemDictionary::Class_klass()) { |
0 | 1285 if (!java_lang_Class::is_primitive(o)) { |
1286 return; | |
1287 } | |
1288 } | |
1289 | |
1290 if (o->is_instance()) { | |
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1291 // create a HPROF_GC_INSTANCE record for each object |
0 | 1292 DumperSupport::dump_instance(writer(), o); |
1293 mark_end_of_record(); | |
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1294 } else if (o->is_objArray()) { |
0 | 1295 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array |
23823
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1296 DumperSupport::dump_object_array(writer(), objArrayOop(o)); |
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1297 mark_end_of_record(); |
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1298 } else if (o->is_typeArray()) { |
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1299 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array |
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1300 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); |
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1301 mark_end_of_record(); |
0 | 1302 } |
1303 } | |
1304 | |
1305 // The VM operation that performs the heap dump | |
1306 class VM_HeapDumper : public VM_GC_Operation { | |
1307 private: | |
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1308 static VM_HeapDumper* _global_dumper; |
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1309 static DumpWriter* _global_writer; |
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1310 DumpWriter* _local_writer; |
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1311 JavaThread* _oome_thread; |
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1312 Method* _oome_constructor; |
0 | 1313 bool _gc_before_heap_dump; |
1314 bool _is_segmented_dump; | |
1315 jlong _dump_start; | |
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1316 GrowableArray<Klass*>* _klass_map; |
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1317 ThreadStackTrace** _stack_traces; |
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1318 int _num_threads; |
0 | 1319 |
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1320 // accessors and setters |
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1321 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1322 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1323 void set_global_dumper() { |
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1324 assert(_global_dumper == NULL, "Error"); |
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1325 _global_dumper = this; |
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1326 } |
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1327 void set_global_writer() { |
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1328 assert(_global_writer == NULL, "Error"); |
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1329 _global_writer = _local_writer; |
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1330 } |
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1331 void clear_global_dumper() { _global_dumper = NULL; } |
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1332 void clear_global_writer() { _global_writer = NULL; } |
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1333 |
0 | 1334 bool is_segmented_dump() const { return _is_segmented_dump; } |
1335 void set_segmented_dump() { _is_segmented_dump = true; } | |
1336 jlong dump_start() const { return _dump_start; } | |
1337 void set_dump_start(jlong pos); | |
1338 | |
1339 bool skip_operation() const; | |
1340 | |
1341 // writes a HPROF_LOAD_CLASS record | |
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1342 static void do_load_class(Klass* k); |
0 | 1343 |
1344 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
1345 // (and each array class too) | |
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1346 static void do_class_dump(Klass* k); |
0 | 1347 |
1348 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1349 // array (and each multi-dimensional array too) | |
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1350 static void do_basic_type_array_class_dump(Klass* k); |
0 | 1351 |
1352 // HPROF_GC_ROOT_THREAD_OBJ records | |
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1353 int do_thread(JavaThread* thread, u4 thread_serial_num); |
0 | 1354 void do_threads(); |
1355 | |
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1356 void add_class_serial_number(Klass* k, int serial_num) { |
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1357 _klass_map->at_put_grow(serial_num, k); |
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1358 } |
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1359 |
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1360 // HPROF_TRACE and HPROF_FRAME records |
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1361 void dump_stack_traces(); |
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1362 |
0 | 1363 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
1364 void write_dump_header(); | |
1365 | |
1366 // fixes up the length of the current dump record | |
1367 void write_current_dump_record_length(); | |
1368 | |
1369 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1370 // record in the case of a segmented heap dump) | |
1371 void end_of_dump(); | |
1372 | |
1373 public: | |
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1374 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : |
0 | 1375 VM_GC_Operation(0 /* total collections, dummy, ignored */, |
2225 | 1376 GCCause::_heap_dump /* GC Cause */, |
0 | 1377 0 /* total full collections, dummy, ignored */, |
1378 gc_before_heap_dump) { | |
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1379 _local_writer = writer; |
0 | 1380 _gc_before_heap_dump = gc_before_heap_dump; |
1381 _is_segmented_dump = false; | |
1382 _dump_start = (jlong)-1; | |
6197 | 1383 _klass_map = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1384 _stack_traces = NULL; |
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1385 _num_threads = 0; |
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1386 if (oome) { |
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1387 assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); |
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1388 // get OutOfMemoryError zero-parameter constructor |
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1389 InstanceKlass* oome_ik = InstanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); |
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1390 _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), |
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1391 vmSymbols::void_method_signature()); |
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1392 // get thread throwing OOME when generating the heap dump at OOME |
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1393 _oome_thread = JavaThread::current(); |
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1394 } else { |
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1395 _oome_thread = NULL; |
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1396 _oome_constructor = NULL; |
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1397 } |
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1398 } |
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1399 ~VM_HeapDumper() { |
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1400 if (_stack_traces != NULL) { |
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1401 for (int i=0; i < _num_threads; i++) { |
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1402 delete _stack_traces[i]; |
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1403 } |
6197 | 1404 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces, mtInternal); |
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1405 } |
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1406 delete _klass_map; |
0 | 1407 } |
1408 | |
1409 VMOp_Type type() const { return VMOp_HeapDumper; } | |
1410 // used to mark sub-record boundary | |
1411 void check_segment_length(); | |
1412 void doit(); | |
1413 }; | |
1414 | |
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1415 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1416 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1417 |
0 | 1418 bool VM_HeapDumper::skip_operation() const { |
1419 return false; | |
1420 } | |
1421 | |
1422 // sets the dump starting position | |
1423 void VM_HeapDumper::set_dump_start(jlong pos) { | |
1424 _dump_start = pos; | |
1425 } | |
1426 | |
1427 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
1428 void VM_HeapDumper::write_dump_header() { | |
1429 if (writer()->is_open()) { | |
1430 if (is_segmented_dump()) { | |
1431 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
1432 } else { | |
1433 writer()->write_u1(HPROF_HEAP_DUMP); | |
1434 } | |
1435 writer()->write_u4(0); // current ticks | |
1436 | |
1437 // record the starting position for the dump (its length will be fixed up later) | |
1438 set_dump_start(writer()->current_offset()); | |
1439 writer()->write_u4(0); | |
1440 } | |
1441 } | |
1442 | |
1443 // fixes up the length of the current dump record | |
1444 void VM_HeapDumper::write_current_dump_record_length() { | |
1445 if (writer()->is_open()) { | |
1446 assert(dump_start() >= 0, "no dump start recorded"); | |
1447 | |
1448 // calculate the size of the dump record | |
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1449 julong dump_end = writer()->current_offset(); |
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1450 julong dump_len = (dump_end - dump_start() - 4); |
0 | 1451 |
1452 // record length must fit in a u4 | |
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1453 if (dump_len > max_juint) { |
0 | 1454 warning("record is too large"); |
1455 } | |
1456 | |
1457 // seek to the dump start and fix-up the length | |
1458 writer()->seek_to_offset(dump_start()); | |
1459 writer()->write_u4((u4)dump_len); | |
1460 | |
1461 // adjust the total size written to keep the bytes written correct. | |
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1462 writer()->adjust_bytes_written(-((jlong) sizeof(u4))); |
0 | 1463 |
1464 // seek to dump end so we can continue | |
1465 writer()->seek_to_offset(dump_end); | |
1466 | |
1467 // no current dump record | |
1468 set_dump_start((jlong)-1); | |
1469 } | |
1470 } | |
1471 | |
1472 // used on a sub-record boundary to check if we need to start a | |
1473 // new segment. | |
1474 void VM_HeapDumper::check_segment_length() { | |
1475 if (writer()->is_open()) { | |
1476 if (is_segmented_dump()) { | |
1477 // don't use current_offset that would be too expensive on a per record basis | |
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1478 julong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); |
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1479 assert(dump_end == (julong)writer()->current_offset(), "checking"); |
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1480 julong dump_len = (dump_end - dump_start() - 4); |
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1481 assert(dump_len <= max_juint, "bad dump length"); |
0 | 1482 |
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1483 if (dump_len > HeapDumpSegmentSize) { |
0 | 1484 write_current_dump_record_length(); |
1485 write_dump_header(); | |
1486 } | |
1487 } | |
1488 } | |
1489 } | |
1490 | |
1491 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
1492 // record in the case of a segmented heap dump) | |
1493 void VM_HeapDumper::end_of_dump() { | |
1494 if (writer()->is_open()) { | |
1495 write_current_dump_record_length(); | |
1496 | |
1497 // for segmented dump we write the end record | |
1498 if (is_segmented_dump()) { | |
1499 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
1500 writer()->write_u4(0); | |
1501 writer()->write_u4(0); | |
1502 } | |
1503 } | |
1504 } | |
1505 | |
1506 // marks sub-record boundary | |
1507 void HeapObjectDumper::mark_end_of_record() { | |
1508 dumper()->check_segment_length(); | |
1509 } | |
1510 | |
1511 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
1512 // array classes) | |
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1513 void VM_HeapDumper::do_load_class(Klass* k) { |
0 | 1514 static u4 class_serial_num = 0; |
1515 | |
1516 // len of HPROF_LOAD_CLASS record | |
1517 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
1518 | |
1519 // write a HPROF_LOAD_CLASS for the class and each array class | |
1520 do { | |
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1521 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
0 | 1522 |
1523 // class serial number is just a number | |
615
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1524 writer()->write_u4(++class_serial_num); |
0 | 1525 |
1526 // class ID | |
6983 | 1527 Klass* klass = k; |
615
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1528 writer()->write_classID(klass); |
0 | 1529 |
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1530 // add the Klass* and class serial number pair |
615
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1531 dumper()->add_class_serial_number(klass, class_serial_num); |
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1532 |
615
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1533 writer()->write_u4(STACK_TRACE_ID); |
0 | 1534 |
1535 // class name ID | |
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1536 Symbol* name = klass->name(); |
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1537 writer()->write_symbolID(name); |
0 | 1538 |
1539 // write a LOAD_CLASS record for the array type (if it exists) | |
1540 k = klass->array_klass_or_null(); | |
1541 } while (k != NULL); | |
1542 } | |
1543 | |
1544 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
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1545 void VM_HeapDumper::do_class_dump(Klass* k) { |
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1546 if (k->oop_is_instance()) { |
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1547 DumperSupport::dump_class_and_array_classes(writer(), k); |
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1548 } |
0 | 1549 } |
1550 | |
1551 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
1552 // array (and each multi-dimensional array too) | |
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1553 void VM_HeapDumper::do_basic_type_array_class_dump(Klass* k) { |
615
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1554 DumperSupport::dump_basic_type_array_class(writer(), k); |
0 | 1555 } |
1556 | |
1557 // Walk the stack of the given thread. | |
1558 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
1559 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
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1560 // |
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1561 // It returns the number of Java frames in this thread stack |
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1562 int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
0 | 1563 JNILocalsDumper blk(writer(), thread_serial_num); |
1564 | |
1565 oop threadObj = java_thread->threadObj(); | |
1566 assert(threadObj != NULL, "sanity check"); | |
1567 | |
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1568 int stack_depth = 0; |
0 | 1569 if (java_thread->has_last_Java_frame()) { |
1570 | |
1571 // vframes are resource allocated | |
1572 Thread* current_thread = Thread::current(); | |
1573 ResourceMark rm(current_thread); | |
1574 HandleMark hm(current_thread); | |
1575 | |
1576 RegisterMap reg_map(java_thread); | |
1577 frame f = java_thread->last_frame(); | |
1578 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
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1579 frame* last_entry_frame = NULL; |
1775
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1580 int extra_frames = 0; |
0 | 1581 |
1775
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1582 if (java_thread == _oome_thread && _oome_constructor != NULL) { |
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1583 extra_frames++; |
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1584 } |
0 | 1585 while (vf != NULL) { |
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1586 blk.set_frame_number(stack_depth); |
0 | 1587 if (vf->is_java_frame()) { |
1588 | |
1589 // java frame (interpreted, compiled, ...) | |
1590 javaVFrame *jvf = javaVFrame::cast(vf); | |
1591 if (!(jvf->method()->is_native())) { | |
1592 StackValueCollection* locals = jvf->locals(); | |
1593 for (int slot=0; slot<locals->size(); slot++) { | |
1594 if (locals->at(slot)->type() == T_OBJECT) { | |
1595 oop o = locals->obj_at(slot)(); | |
1596 | |
1597 if (o != NULL) { | |
1598 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
1599 writer()->write_objectID(o); | |
1600 writer()->write_u4(thread_serial_num); | |
1775
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1601 writer()->write_u4((u4) (stack_depth + extra_frames)); |
0 | 1602 } |
1603 } | |
1604 } | |
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1605 } else { |
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1606 // native frame |
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1607 if (stack_depth == 0) { |
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1608 // JNI locals for the top frame. |
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1609 java_thread->active_handles()->oops_do(&blk); |
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1610 } else { |
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1611 if (last_entry_frame != NULL) { |
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1612 // JNI locals for the entry frame |
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1613 assert(last_entry_frame->is_entry_frame(), "checking"); |
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1614 last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
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1615 } |
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1616 } |
0 | 1617 } |
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1618 // increment only for Java frames |
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1619 stack_depth++; |
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1620 last_entry_frame = NULL; |
0 | 1621 |
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1622 } else { |
0 | 1623 // externalVFrame - if it's an entry frame then report any JNI locals |
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1624 // as roots when we find the corresponding native javaVFrame |
0 | 1625 frame* fr = vf->frame_pointer(); |
1626 assert(fr != NULL, "sanity check"); | |
1627 if (fr->is_entry_frame()) { | |
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1628 last_entry_frame = fr; |
0 | 1629 } |
1630 } | |
1631 vf = vf->sender(); | |
1632 } | |
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1633 } else { |
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1634 // no last java frame but there may be JNI locals |
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1635 java_thread->active_handles()->oops_do(&blk); |
0 | 1636 } |
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1637 return stack_depth; |
0 | 1638 } |
1639 | |
1640 | |
1641 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
1642 // the stack so that locals and JNI locals are dumped. | |
1643 void VM_HeapDumper::do_threads() { | |
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1644 for (int i=0; i < _num_threads; i++) { |
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1645 JavaThread* thread = _stack_traces[i]->thread(); |
0 | 1646 oop threadObj = thread->threadObj(); |
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1647 u4 thread_serial_num = i+1; |
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1648 u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
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1649 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
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1650 writer()->write_objectID(threadObj); |
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1651 writer()->write_u4(thread_serial_num); // thread number |
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1652 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1653 int num_frames = do_thread(thread, thread_serial_num); |
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1654 assert(num_frames == _stack_traces[i]->get_stack_depth(), |
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1655 "total number of Java frames not matched"); |
0 | 1656 } |
1657 } | |
1658 | |
1659 | |
1660 // The VM operation that dumps the heap. The dump consists of the following | |
1661 // records: | |
1662 // | |
1663 // HPROF_HEADER | |
1664 // [HPROF_UTF8]* | |
1665 // [HPROF_LOAD_CLASS]* | |
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1666 // [[HPROF_FRAME]*|HPROF_TRACE]* |
0 | 1667 // [HPROF_GC_CLASS_DUMP]* |
1668 // HPROF_HEAP_DUMP | |
1669 // | |
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1670 // The HPROF_TRACE records represent the stack traces where the heap dump |
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1671 // is generated and a "dummy trace" record which does not include |
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1672 // any frames. The dummy trace record is used to be referenced as the |
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1673 // unknown object alloc site. |
0 | 1674 // |
1675 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
1676 // the heap dump be generated in a single pass we remember the position of | |
1677 // the dump length and fix it up after all sub-records have been written. | |
1678 // To generate the sub-records we iterate over the heap, writing | |
1679 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
1680 // records as we go. Once that is done we write records for some of the GC | |
1681 // roots. | |
1682 | |
1683 void VM_HeapDumper::doit() { | |
1684 | |
1685 HandleMark hm; | |
1686 CollectedHeap* ch = Universe::heap(); | |
4076 | 1687 |
1688 ch->ensure_parsability(false); // must happen, even if collection does | |
1689 // not happen (e.g. due to GC_locker) | |
1690 | |
0 | 1691 if (_gc_before_heap_dump) { |
4076 | 1692 if (GC_locker::is_active()) { |
1693 warning("GC locker is held; pre-heapdump GC was skipped"); | |
1694 } else { | |
1695 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
1696 } | |
0 | 1697 } |
1698 | |
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1699 // At this point we should be the only dumper active, so |
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1700 // the following should be safe. |
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1701 set_global_dumper(); |
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1702 set_global_writer(); |
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1703 |
0 | 1704 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
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1705 size_t used = ch->used(); |
0 | 1706 const char* header; |
1707 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
1708 set_segmented_dump(); | |
1709 header = "JAVA PROFILE 1.0.2"; | |
1710 } else { | |
1711 header = "JAVA PROFILE 1.0.1"; | |
1712 } | |
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1713 |
0 | 1714 // header is few bytes long - no chance to overflow int |
1715 writer()->write_raw((void*)header, (int)strlen(header)); | |
1716 writer()->write_u1(0); // terminator | |
1717 writer()->write_u4(oopSize); | |
1718 writer()->write_u8(os::javaTimeMillis()); | |
1719 | |
1720 // HPROF_UTF8 records | |
1721 SymbolTableDumper sym_dumper(writer()); | |
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1722 SymbolTable::symbols_do(&sym_dumper); |
0 | 1723 |
1724 // write HPROF_LOAD_CLASS records | |
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1725 ClassLoaderDataGraph::classes_do(&do_load_class); |
0 | 1726 Universe::basic_type_classes_do(&do_load_class); |
1727 | |
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1728 // write HPROF_FRAME and HPROF_TRACE records |
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1729 // this must be called after _klass_map is built when iterating the classes above. |
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1730 dump_stack_traces(); |
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1731 |
0 | 1732 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
1733 write_dump_header(); | |
1734 | |
1735 // Writes HPROF_GC_CLASS_DUMP records | |
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1736 ClassLoaderDataGraph::classes_do(&do_class_dump); |
0 | 1737 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); |
1738 check_segment_length(); | |
1739 | |
1740 // writes HPROF_GC_INSTANCE_DUMP records. | |
1741 // After each sub-record is written check_segment_length will be invoked. When | |
1742 // generated a segmented heap dump this allows us to check if the current | |
1743 // segment exceeds a threshold and if so, then a new segment is started. | |
1744 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
1745 // of the heap dump. | |
1746 HeapObjectDumper obj_dumper(this, writer()); | |
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1747 Universe::heap()->safe_object_iterate(&obj_dumper); |
0 | 1748 |
1749 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
1750 do_threads(); | |
1751 check_segment_length(); | |
1752 | |
1753 // HPROF_GC_ROOT_MONITOR_USED | |
1754 MonitorUsedDumper mon_dumper(writer()); | |
1755 ObjectSynchronizer::oops_do(&mon_dumper); | |
1756 check_segment_length(); | |
1757 | |
1758 // HPROF_GC_ROOT_JNI_GLOBAL | |
1759 JNIGlobalsDumper jni_dumper(writer()); | |
1760 JNIHandles::oops_do(&jni_dumper); | |
1761 check_segment_length(); | |
1762 | |
1763 // HPROF_GC_ROOT_STICKY_CLASS | |
1764 StickyClassDumper class_dumper(writer()); | |
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1765 SystemDictionary::always_strong_classes_do(&class_dumper); |
0 | 1766 |
1767 // fixes up the length of the dump record. In the case of a segmented | |
1768 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
1769 end_of_dump(); | |
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1770 |
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1771 // Now we clear the global variables, so that a future dumper might run. |
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1772 clear_global_dumper(); |
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1773 clear_global_writer(); |
0 | 1774 } |
1775 | |
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1776 void VM_HeapDumper::dump_stack_traces() { |
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1777 // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
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1778 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
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1779 writer()->write_u4((u4) STACK_TRACE_ID); |
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1780 writer()->write_u4(0); // thread number |
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1781 writer()->write_u4(0); // frame count |
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1782 |
6197 | 1783 _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads(), mtInternal); |
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1784 int frame_serial_num = 0; |
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1785 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
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1786 oop threadObj = thread->threadObj(); |
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1787 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
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1788 // dump thread stack trace |
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1789 ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
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1790 stack_trace->dump_stack_at_safepoint(-1); |
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1791 _stack_traces[_num_threads++] = stack_trace; |
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1792 |
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1793 // write HPROF_FRAME records for this thread's stack trace |
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1794 int depth = stack_trace->get_stack_depth(); |
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1795 int thread_frame_start = frame_serial_num; |
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1796 int extra_frames = 0; |
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1797 // write fake frame that makes it look like the thread, which caused OOME, |
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1798 // is in the OutOfMemoryError zero-parameter constructor |
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1799 if (thread == _oome_thread && _oome_constructor != NULL) { |
6983 | 1800 int oome_serial_num = _klass_map->find(_oome_constructor->method_holder()); |
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1801 // the class serial number starts from 1 |
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1802 assert(oome_serial_num > 0, "OutOfMemoryError class not found"); |
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1803 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, oome_serial_num, |
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1804 _oome_constructor, 0); |
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1805 extra_frames++; |
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1806 } |
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1807 for (int j=0; j < depth; j++) { |
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1808 StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
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1809 Method* m = frame->method(); |
6983 | 1810 int class_serial_num = _klass_map->find(m->method_holder()); |
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1811 // the class serial number starts from 1 |
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1812 assert(class_serial_num > 0, "class not found"); |
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1813 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
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1814 } |
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1815 depth += extra_frames; |
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1816 |
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1817 // write HPROF_TRACE record for one thread |
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1818 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
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1819 int stack_serial_num = _num_threads + STACK_TRACE_ID; |
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1820 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1821 writer()->write_u4((u4) _num_threads); // thread serial number |
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1822 writer()->write_u4(depth); // frame count |
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1823 for (int j=1; j <= depth; j++) { |
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1824 writer()->write_id(thread_frame_start + j); |
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1825 } |
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1826 } |
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1827 } |
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1828 } |
0 | 1829 |
1830 // dump the heap to given path. | |
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1831 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL |
0 | 1832 int HeapDumper::dump(const char* path) { |
1833 assert(path != NULL && strlen(path) > 0, "path missing"); | |
1834 | |
1835 // print message in interactive case | |
1836 if (print_to_tty()) { | |
1837 tty->print_cr("Dumping heap to %s ...", path); | |
1838 timer()->start(); | |
1839 } | |
1840 | |
1841 // create the dump writer. If the file can be opened then bail | |
1842 DumpWriter writer(path); | |
1843 if (!writer.is_open()) { | |
1844 set_error(writer.error()); | |
1845 if (print_to_tty()) { | |
1846 tty->print_cr("Unable to create %s: %s", path, | |
1847 (error() != NULL) ? error() : "reason unknown"); | |
1848 } | |
1849 return -1; | |
1850 } | |
1851 | |
1852 // generate the dump | |
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1853 VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); |
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1854 if (Thread::current()->is_VM_thread()) { |
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1855 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1856 dumper.doit(); |
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1857 } else { |
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1858 VMThread::execute(&dumper); |
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1859 } |
0 | 1860 |
1861 // close dump file and record any error that the writer may have encountered | |
1862 writer.close(); | |
1863 set_error(writer.error()); | |
1864 | |
1865 // print message in interactive case | |
1866 if (print_to_tty()) { | |
1867 timer()->stop(); | |
1868 if (error() == NULL) { | |
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1869 tty->print_cr("Heap dump file created [" JULONG_FORMAT " bytes in %3.3f secs]", |
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1870 writer.bytes_written(), timer()->seconds()); |
0 | 1871 } else { |
1872 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
1873 } | |
1874 } | |
1875 | |
1876 return (writer.error() == NULL) ? 0 : -1; | |
1877 } | |
1878 | |
1879 // stop timer (if still active), and free any error string we might be holding | |
1880 HeapDumper::~HeapDumper() { | |
1881 if (timer()->is_active()) { | |
1882 timer()->stop(); | |
1883 } | |
1884 set_error(NULL); | |
1885 } | |
1886 | |
1887 | |
1888 // returns the error string (resource allocated), or NULL | |
1889 char* HeapDumper::error_as_C_string() const { | |
1890 if (error() != NULL) { | |
1891 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
1892 strcpy(str, error()); | |
1893 return str; | |
1894 } else { | |
1895 return NULL; | |
1896 } | |
1897 } | |
1898 | |
1899 // set the error string | |
1900 void HeapDumper::set_error(char* error) { | |
1901 if (_error != NULL) { | |
1902 os::free(_error); | |
1903 } | |
1904 if (error == NULL) { | |
1905 _error = NULL; | |
1906 } else { | |
1907 _error = os::strdup(error); | |
1908 assert(_error != NULL, "allocation failure"); | |
1909 } | |
1910 } | |
1911 | |
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1912 // Called by out-of-memory error reporting by a single Java thread |
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1913 // outside of a JVM safepoint |
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1914 void HeapDumper::dump_heap_from_oome() { |
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1915 HeapDumper::dump_heap(true); |
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1916 } |
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1917 |
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1918 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1919 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1920 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1921 // general use, however, this method will need modification to prevent |
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1922 // inteference when updating the static variables base_path and dump_file_seq below. |
0 | 1923 void HeapDumper::dump_heap() { |
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1924 HeapDumper::dump_heap(false); |
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1925 } |
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1926 |
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1927 void HeapDumper::dump_heap(bool oome) { |
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1928 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1929 static uint dump_file_seq = 0; |
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1930 char* my_path; |
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1931 const int max_digit_chars = 20; |
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1932 |
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1933 const char* dump_file_name = "java_pid"; |
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1934 const char* dump_file_ext = ".hprof"; |
0 | 1935 |
1936 // The dump file defaults to java_pid<pid>.hprof in the current working | |
1937 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
1938 // dump file name or a directory where dump file is created. | |
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1939 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1940 // Calculate potentially longest base path and check if we have enough |
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1941 // allocated statically. |
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1942 const size_t total_length = |
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1943 (HeapDumpPath == NULL ? 0 : strlen(HeapDumpPath)) + |
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1944 strlen(os::file_separator()) + max_digit_chars + |
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1945 strlen(dump_file_name) + strlen(dump_file_ext) + 1; |
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1946 if (total_length > sizeof(base_path)) { |
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1947 warning("Cannot create heap dump file. HeapDumpPath is too long."); |
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1948 return; |
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1949 } |
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1950 |
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1951 bool use_default_filename = true; |
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1952 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1953 // HeapDumpPath=<file> not specified |
0 | 1954 } else { |
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1955 strncpy(base_path, HeapDumpPath, sizeof(base_path)); |
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1956 // check if the path is a directory (must exist) |
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1957 DIR* dir = os::opendir(base_path); |
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1958 if (dir == NULL) { |
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1959 use_default_filename = false; |
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1960 } else { |
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1961 // HeapDumpPath specified a directory. We append a file separator |
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1962 // (if needed). |
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1963 os::closedir(dir); |
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1964 size_t fs_len = strlen(os::file_separator()); |
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1965 if (strlen(base_path) >= fs_len) { |
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1966 char* end = base_path; |
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1967 end += (strlen(base_path) - fs_len); |
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1968 if (strcmp(end, os::file_separator()) != 0) { |
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1969 strcat(base_path, os::file_separator()); |
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1970 } |
0 | 1971 } |
1972 } | |
1973 } | |
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1974 // If HeapDumpPath wasn't a file name then we append the default name |
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1975 if (use_default_filename) { |
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1976 const size_t dlen = strlen(base_path); // if heap dump dir specified |
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1977 jio_snprintf(&base_path[dlen], sizeof(base_path)-dlen, "%s%d%s", |
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1978 dump_file_name, os::current_process_id(), dump_file_ext); |
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1979 } |
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1980 const size_t len = strlen(base_path) + 1; |
6197 | 1981 my_path = (char*)os::malloc(len, mtInternal); |
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1982 if (my_path == NULL) { |
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1983 warning("Cannot create heap dump file. Out of system memory."); |
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1984 return; |
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1985 } |
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1986 strncpy(my_path, base_path, len); |
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1987 } else { |
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1988 // Append a sequence number id for dumps following the first |
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1989 const size_t len = strlen(base_path) + max_digit_chars + 2; // for '.' and \0 |
6197 | 1990 my_path = (char*)os::malloc(len, mtInternal); |
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1991 if (my_path == NULL) { |
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1992 warning("Cannot create heap dump file. Out of system memory."); |
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1993 return; |
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1994 } |
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1995 jio_snprintf(my_path, len, "%s.%d", base_path, dump_file_seq); |
0 | 1996 } |
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1997 dump_file_seq++; // increment seq number for next time we dump |
0 | 1998 |
1999 HeapDumper dumper(false /* no GC before heap dump */, | |
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2000 true /* send to tty */, |
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2001 oome /* pass along out-of-memory-error flag */); |
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2002 dumper.dump(my_path); |
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2003 os::free(my_path); |
0 | 2004 } |