Mercurial > hg > graal-compiler
annotate src/share/vm/services/heapDumper.cpp @ 10103:07a4efc5ed14
8012455: Missing time and date stamps for PrintGCApplicationConcurrentTime and PrintGCApplicationStoppedTime
Summary: also reviewed by: kirk@kodewerk.com, brandon@twitter.com
Reviewed-by: tschatzl, stefank, johnc
| author | brutisso |
|---|---|
| date | Thu, 18 Apr 2013 06:50:35 +0200 |
| parents | 8391fdd36e1f |
| children | 190899198332 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2005, 2013, 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) | |
| 379 jlong _bytes_written; // number of byte written to dump file | |
| 380 | |
| 381 char* _buffer; // internal buffer | |
| 382 int _size; | |
| 383 int _pos; | |
| 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; } | |
| 391 int buffer_size() const { return _size; } | |
| 392 int position() const { return _pos; } | |
| 393 void set_position(int pos) { _pos = pos; } | |
| 394 | |
| 395 void set_error(const char* error) { _error = (char*)os::strdup(error); } | |
| 396 | |
| 397 // all I/O go through this function | |
| 398 void write_internal(void* s, int len); | |
| 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 | |
| 409 jlong bytes_written() const { return _bytes_written; } | |
| 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) | |
| 413 void adjust_bytes_written(jlong n) { _bytes_written += n; } | |
| 414 | |
| 415 // number of (buffered) bytes as yet unwritten to the dump file | |
| 416 jlong bytes_unwritten() const { return (jlong)position(); } | |
| 417 | |
| 418 char* error() const { return _error; } | |
| 419 | |
| 420 jlong current_offset(); | |
| 421 void seek_to_offset(jlong pos); | |
| 422 | |
| 423 // writer functions | |
| 424 void write_raw(void* s, int len); | |
| 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(); |
| 471 ::close(file_descriptor()); | |
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472 set_file_descriptor(-1); |
| 0 | 473 } |
| 474 } | |
| 475 | |
| 476 // write directly to the file | |
| 477 void DumpWriter::write_internal(void* s, int len) { | |
| 478 if (is_open()) { | |
| 479 int n = ::write(file_descriptor(), s, len); | |
| 480 if (n > 0) { | |
| 481 _bytes_written += n; | |
| 482 } | |
| 483 if (n != len) { | |
| 484 if (n < 0) { | |
| 485 set_error(strerror(errno)); | |
| 486 } else { | |
| 487 set_error("file size limit"); | |
| 488 } | |
| 489 ::close(file_descriptor()); | |
| 490 set_file_descriptor(-1); | |
| 491 } | |
| 492 } | |
| 493 } | |
| 494 | |
| 495 // write raw bytes | |
| 496 void DumpWriter::write_raw(void* s, int len) { | |
| 497 if (is_open()) { | |
| 498 // flush buffer to make toom | |
| 499 if ((position()+ len) >= buffer_size()) { | |
| 500 flush(); | |
| 501 } | |
| 502 | |
| 503 // buffer not available or too big to buffer it | |
| 504 if ((buffer() == NULL) || (len >= buffer_size())) { | |
| 505 write_internal(s, len); | |
| 506 } else { | |
| 507 // Should optimize this for u1/u2/u4/u8 sizes. | |
| 508 memcpy(buffer() + position(), s, len); | |
| 509 set_position(position() + len); | |
| 510 } | |
| 511 } | |
| 512 } | |
| 513 | |
| 514 // flush any buffered bytes to the file | |
| 515 void DumpWriter::flush() { | |
| 516 if (is_open() && position() > 0) { | |
| 517 write_internal(buffer(), position()); | |
| 518 set_position(0); | |
| 519 } | |
| 520 } | |
| 521 | |
| 522 | |
| 523 jlong DumpWriter::current_offset() { | |
| 524 if (is_open()) { | |
| 525 // the offset is the file offset plus whatever we have buffered | |
| 526 jlong offset = os::current_file_offset(file_descriptor()); | |
| 527 assert(offset >= 0, "lseek failed"); | |
| 528 return offset + (jlong)position(); | |
| 529 } else { | |
| 530 return (jlong)-1; | |
| 531 } | |
| 532 } | |
| 533 | |
| 534 void DumpWriter::seek_to_offset(jlong off) { | |
| 535 assert(off >= 0, "bad offset"); | |
| 536 | |
| 537 // need to flush before seeking | |
| 538 flush(); | |
| 539 | |
| 540 // may be closed due to I/O error | |
| 541 if (is_open()) { | |
| 542 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
| 543 assert(n >= 0, "lseek failed"); | |
| 544 } | |
| 545 } | |
| 546 | |
| 547 void DumpWriter::write_u2(u2 x) { | |
| 548 u2 v; | |
| 549 Bytes::put_Java_u2((address)&v, x); | |
| 550 write_raw((void*)&v, 2); | |
| 551 } | |
| 552 | |
| 553 void DumpWriter::write_u4(u4 x) { | |
| 554 u4 v; | |
| 555 Bytes::put_Java_u4((address)&v, x); | |
| 556 write_raw((void*)&v, 4); | |
| 557 } | |
| 558 | |
| 559 void DumpWriter::write_u8(u8 x) { | |
| 560 u8 v; | |
| 561 Bytes::put_Java_u8((address)&v, x); | |
| 562 write_raw((void*)&v, 8); | |
| 563 } | |
| 564 | |
| 565 void DumpWriter::write_objectID(oop o) { | |
| 566 address a = (address)((uintptr_t)o); | |
| 567 #ifdef _LP64 | |
| 568 write_u8((u8)a); | |
| 569 #else | |
| 570 write_u4((u4)a); | |
| 571 #endif | |
| 572 } | |
| 573 | |
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574 void DumpWriter::write_symbolID(Symbol* s) { |
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575 address a = (address)((uintptr_t)s); |
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576 #ifdef _LP64 |
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577 write_u8((u8)a); |
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578 #else |
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579 write_u4((u4)a); |
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580 #endif |
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581 } |
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582 |
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583 void DumpWriter::write_id(u4 x) { |
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584 #ifdef _LP64 |
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585 write_u8((u8) x); |
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586 #else |
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587 write_u4(x); |
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588 #endif |
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589 } |
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590 |
| 0 | 591 // We use java mirror as the class ID |
| 592 void DumpWriter::write_classID(Klass* k) { | |
| 593 write_objectID(k->java_mirror()); | |
| 594 } | |
| 595 | |
| 596 | |
| 597 | |
| 598 // Support class with a collection of functions used when dumping the heap | |
| 599 | |
| 600 class DumperSupport : AllStatic { | |
| 601 public: | |
| 602 | |
| 603 // write a header of the given type | |
| 604 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
| 605 | |
| 606 // returns hprof tag for the given type signature | |
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607 static hprofTag sig2tag(Symbol* sig); |
| 0 | 608 // returns hprof tag for the given basic type |
| 609 static hprofTag type2tag(BasicType type); | |
| 610 | |
| 611 // returns the size of the instance of the given class | |
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612 static u4 instance_size(Klass* k); |
| 0 | 613 |
| 614 // dump a jfloat | |
| 615 static void dump_float(DumpWriter* writer, jfloat f); | |
| 616 // dump a jdouble | |
| 617 static void dump_double(DumpWriter* writer, jdouble d); | |
| 618 // dumps the raw value of the given field | |
| 619 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
| 620 // dumps static fields of the given class | |
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621 static void dump_static_fields(DumpWriter* writer, Klass* k); |
| 0 | 622 // dump the raw values of the instance fields of the given object |
| 623 static void dump_instance_fields(DumpWriter* writer, oop o); | |
| 624 // dumps the definition of the instance fields for a given class | |
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625 static void dump_instance_field_descriptors(DumpWriter* writer, Klass* k); |
| 0 | 626 // creates HPROF_GC_INSTANCE_DUMP record for the given object |
| 627 static void dump_instance(DumpWriter* writer, oop o); | |
| 628 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
| 629 // array classes | |
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630 static void dump_class_and_array_classes(DumpWriter* writer, Klass* k); |
| 0 | 631 // creates HPROF_GC_CLASS_DUMP record for a given primitive array |
| 632 // class (and each multi-dimensional array class too) | |
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633 static void dump_basic_type_array_class(DumpWriter* writer, Klass* k); |
| 0 | 634 |
| 635 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 636 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
| 637 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 638 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
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639 // create HPROF_FRAME record for the given method and bci |
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640 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, Method* m, int bci); |
| 0 | 641 }; |
| 642 | |
| 643 // write a header of the given type | |
| 644 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
| 645 writer->write_u1((u1)tag); | |
| 646 writer->write_u4(0); // current ticks | |
| 647 writer->write_u4(len); | |
| 648 } | |
| 649 | |
| 650 // returns hprof tag for the given type signature | |
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651 hprofTag DumperSupport::sig2tag(Symbol* sig) { |
| 0 | 652 switch (sig->byte_at(0)) { |
| 653 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
| 654 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
| 655 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
| 656 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
| 657 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
| 658 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
| 659 case JVM_SIGNATURE_INT : return HPROF_INT; | |
| 660 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
| 661 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
| 662 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
| 663 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 664 } | |
| 665 } | |
| 666 | |
| 667 hprofTag DumperSupport::type2tag(BasicType type) { | |
| 668 switch (type) { | |
| 669 case T_BYTE : return HPROF_BYTE; | |
| 670 case T_CHAR : return HPROF_CHAR; | |
| 671 case T_FLOAT : return HPROF_FLOAT; | |
| 672 case T_DOUBLE : return HPROF_DOUBLE; | |
| 673 case T_INT : return HPROF_INT; | |
| 674 case T_LONG : return HPROF_LONG; | |
| 675 case T_SHORT : return HPROF_SHORT; | |
| 676 case T_BOOLEAN : return HPROF_BOOLEAN; | |
| 677 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 678 } | |
| 679 } | |
| 680 | |
| 681 // dump a jfloat | |
| 682 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
| 683 if (g_isnan(f)) { | |
| 684 writer->write_u4(0x7fc00000); // collapsing NaNs | |
| 685 } else { | |
| 686 union { | |
| 687 int i; | |
| 688 float f; | |
| 689 } u; | |
| 690 u.f = (float)f; | |
| 691 writer->write_u4((u4)u.i); | |
| 692 } | |
| 693 } | |
| 694 | |
| 695 // dump a jdouble | |
| 696 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
| 697 union { | |
| 698 jlong l; | |
| 699 double d; | |
| 700 } u; | |
| 701 if (g_isnan(d)) { // collapsing NaNs | |
| 702 u.l = (jlong)(0x7ff80000); | |
| 703 u.l = (u.l << 32); | |
| 704 } else { | |
| 705 u.d = (double)d; | |
| 706 } | |
| 707 writer->write_u8((u8)u.l); | |
| 708 } | |
| 709 | |
| 710 // dumps the raw value of the given field | |
| 711 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
| 712 switch (type) { | |
| 713 case JVM_SIGNATURE_CLASS : | |
| 714 case JVM_SIGNATURE_ARRAY : { | |
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715 oop o; |
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716 if (UseCompressedOops) { |
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717 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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718 } else { |
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719 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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720 } |
| 0 | 721 |
| 722 // reflection and sun.misc.Unsafe classes may have a reference to a | |
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723 // Klass* so filter it out. |
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724 assert(o->is_oop_or_null(), "should always be an oop"); |
| 0 | 725 writer->write_objectID(o); |
| 726 break; | |
| 727 } | |
| 728 case JVM_SIGNATURE_BYTE : { | |
| 729 jbyte* b = (jbyte*)addr; | |
| 730 writer->write_u1((u1)*b); | |
| 731 break; | |
| 732 } | |
| 733 case JVM_SIGNATURE_CHAR : { | |
| 734 jchar* c = (jchar*)addr; | |
| 735 writer->write_u2((u2)*c); | |
| 736 break; | |
| 737 } | |
| 738 case JVM_SIGNATURE_SHORT : { | |
| 739 jshort* s = (jshort*)addr; | |
| 740 writer->write_u2((u2)*s); | |
| 741 break; | |
| 742 } | |
| 743 case JVM_SIGNATURE_FLOAT : { | |
| 744 jfloat* f = (jfloat*)addr; | |
| 745 dump_float(writer, *f); | |
| 746 break; | |
| 747 } | |
| 748 case JVM_SIGNATURE_DOUBLE : { | |
| 749 jdouble* f = (jdouble*)addr; | |
| 750 dump_double(writer, *f); | |
| 751 break; | |
| 752 } | |
| 753 case JVM_SIGNATURE_INT : { | |
| 754 jint* i = (jint*)addr; | |
| 755 writer->write_u4((u4)*i); | |
| 756 break; | |
| 757 } | |
| 758 case JVM_SIGNATURE_LONG : { | |
| 759 jlong* l = (jlong*)addr; | |
| 760 writer->write_u8((u8)*l); | |
| 761 break; | |
| 762 } | |
| 763 case JVM_SIGNATURE_BOOLEAN : { | |
| 764 jboolean* b = (jboolean*)addr; | |
| 765 writer->write_u1((u1)*b); | |
| 766 break; | |
| 767 } | |
| 768 default : ShouldNotReachHere(); | |
| 769 } | |
| 770 } | |
| 771 | |
| 772 // returns the size of the instance of the given class | |
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773 u4 DumperSupport::instance_size(Klass* k) { |
| 0 | 774 HandleMark hm; |
| 775 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 776 | |
| 777 int size = 0; | |
| 778 | |
| 779 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 780 if (!fld.access_flags().is_static()) { | |
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781 Symbol* sig = fld.signature(); |
| 0 | 782 switch (sig->byte_at(0)) { |
| 783 case JVM_SIGNATURE_CLASS : | |
| 784 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
| 785 | |
| 786 case JVM_SIGNATURE_BYTE : | |
| 787 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
| 788 | |
| 789 case JVM_SIGNATURE_CHAR : | |
| 790 case JVM_SIGNATURE_SHORT : size += 2; break; | |
| 791 | |
| 792 case JVM_SIGNATURE_INT : | |
| 793 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
| 794 | |
| 795 case JVM_SIGNATURE_LONG : | |
| 796 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
| 797 | |
| 798 default : ShouldNotReachHere(); | |
| 799 } | |
| 800 } | |
| 801 } | |
| 802 return (u4)size; | |
| 803 } | |
| 804 | |
| 805 // dumps static fields of the given class | |
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806 void DumperSupport::dump_static_fields(DumpWriter* writer, Klass* k) { |
| 0 | 807 HandleMark hm; |
| 808 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 809 | |
| 810 // pass 1 - count the static fields | |
| 811 u2 field_count = 0; | |
| 812 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 813 if (fldc.access_flags().is_static()) field_count++; | |
| 814 } | |
| 815 | |
| 816 writer->write_u2(field_count); | |
| 817 | |
| 818 // pass 2 - dump the field descriptors and raw values | |
| 819 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 820 if (fld.access_flags().is_static()) { | |
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821 Symbol* sig = fld.signature(); |
| 0 | 822 |
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823 writer->write_symbolID(fld.name()); // name |
| 0 | 824 writer->write_u1(sig2tag(sig)); // type |
| 825 | |
| 826 // value | |
| 827 int offset = fld.offset(); | |
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828 address addr = (address)ikh->java_mirror() + offset; |
| 0 | 829 |
| 830 dump_field_value(writer, sig->byte_at(0), addr); | |
| 831 } | |
| 832 } | |
| 833 } | |
| 834 | |
| 835 // dump the raw values of the instance fields of the given object | |
| 836 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
| 837 HandleMark hm; | |
| 838 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
| 839 | |
| 840 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 841 if (!fld.access_flags().is_static()) { | |
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842 Symbol* sig = fld.signature(); |
| 0 | 843 address addr = (address)o + fld.offset(); |
| 844 | |
| 845 dump_field_value(writer, sig->byte_at(0), addr); | |
| 846 } | |
| 847 } | |
| 848 } | |
| 849 | |
| 850 // dumps the definition of the instance fields for a given class | |
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851 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, Klass* k) { |
| 0 | 852 HandleMark hm; |
| 853 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 854 | |
| 855 // pass 1 - count the instance fields | |
| 856 u2 field_count = 0; | |
| 857 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 858 if (!fldc.access_flags().is_static()) field_count++; | |
| 859 } | |
| 860 | |
| 861 writer->write_u2(field_count); | |
| 862 | |
| 863 // pass 2 - dump the field descriptors | |
| 864 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 865 if (!fld.access_flags().is_static()) { | |
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866 Symbol* sig = fld.signature(); |
| 0 | 867 |
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868 writer->write_symbolID(fld.name()); // name |
| 0 | 869 writer->write_u1(sig2tag(sig)); // type |
| 870 } | |
| 871 } | |
| 872 } | |
| 873 | |
| 874 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 875 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
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876 Klass* k = o->klass(); |
| 0 | 877 |
| 878 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
| 879 writer->write_objectID(o); | |
| 880 writer->write_u4(STACK_TRACE_ID); | |
| 881 | |
| 882 // class ID | |
| 6983 | 883 writer->write_classID(k); |
| 0 | 884 |
| 885 // number of bytes that follow | |
| 886 writer->write_u4(instance_size(k) ); | |
| 887 | |
| 888 // field values | |
| 889 dump_instance_fields(writer, o); | |
| 890 } | |
| 891 | |
| 892 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
| 893 // its array classes | |
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894 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, Klass* k) { |
| 6983 | 895 Klass* klass = k; |
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896 assert(klass->oop_is_instance(), "not an InstanceKlass"); |
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897 InstanceKlass* ik = (InstanceKlass*)klass; |
| 0 | 898 |
| 899 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 900 | |
| 901 // class ID | |
| 902 writer->write_classID(ik); | |
| 903 writer->write_u4(STACK_TRACE_ID); | |
| 904 | |
| 905 // super class ID | |
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906 Klass* java_super = ik->java_super(); |
| 0 | 907 if (java_super == NULL) { |
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908 writer->write_objectID(oop(NULL)); |
| 0 | 909 } else { |
| 6983 | 910 writer->write_classID(java_super); |
| 0 | 911 } |
| 912 | |
| 913 writer->write_objectID(ik->class_loader()); | |
| 914 writer->write_objectID(ik->signers()); | |
| 915 writer->write_objectID(ik->protection_domain()); | |
| 916 | |
| 917 // reserved | |
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918 writer->write_objectID(oop(NULL)); |
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919 writer->write_objectID(oop(NULL)); |
| 0 | 920 |
| 921 // instance size | |
| 922 writer->write_u4(DumperSupport::instance_size(k)); | |
| 923 | |
| 924 // size of constant pool - ignored by HAT 1.1 | |
| 925 writer->write_u2(0); | |
| 926 | |
| 927 // number of static fields | |
| 928 dump_static_fields(writer, k); | |
| 929 | |
| 930 // description of instance fields | |
| 931 dump_instance_field_descriptors(writer, k); | |
| 932 | |
| 933 // array classes | |
| 934 k = klass->array_klass_or_null(); | |
| 935 while (k != NULL) { | |
| 6983 | 936 Klass* klass = k; |
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937 assert(klass->oop_is_objArray(), "not an ObjArrayKlass"); |
| 0 | 938 |
| 939 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 940 writer->write_classID(klass); | |
| 941 writer->write_u4(STACK_TRACE_ID); | |
| 942 | |
| 943 // super class of array classes is java.lang.Object | |
| 944 java_super = klass->java_super(); | |
| 945 assert(java_super != NULL, "checking"); | |
| 6983 | 946 writer->write_classID(java_super); |
| 0 | 947 |
| 948 writer->write_objectID(ik->class_loader()); | |
| 949 writer->write_objectID(ik->signers()); | |
| 950 writer->write_objectID(ik->protection_domain()); | |
| 951 | |
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952 writer->write_objectID(oop(NULL)); // reserved |
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953 writer->write_objectID(oop(NULL)); |
| 0 | 954 writer->write_u4(0); // instance size |
| 955 writer->write_u2(0); // constant pool | |
| 956 writer->write_u2(0); // static fields | |
| 957 writer->write_u2(0); // instance fields | |
| 958 | |
| 959 // get the array class for the next rank | |
| 960 k = klass->array_klass_or_null(); | |
| 961 } | |
| 962 } | |
| 963 | |
| 964 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 965 // class (and each multi-dimensional array class too) | |
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966 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, Klass* k) { |
| 0 | 967 // array classes |
| 968 while (k != NULL) { | |
| 6983 | 969 Klass* klass = k; |
| 0 | 970 |
| 971 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 972 writer->write_classID(klass); | |
| 973 writer->write_u4(STACK_TRACE_ID); | |
| 974 | |
| 975 // super class of array classes is java.lang.Object | |
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976 Klass* java_super = klass->java_super(); |
| 0 | 977 assert(java_super != NULL, "checking"); |
| 6983 | 978 writer->write_classID(java_super); |
| 0 | 979 |
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980 writer->write_objectID(oop(NULL)); // loader |
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981 writer->write_objectID(oop(NULL)); // signers |
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982 writer->write_objectID(oop(NULL)); // protection domain |
| 0 | 983 |
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984 writer->write_objectID(oop(NULL)); // reserved |
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985 writer->write_objectID(oop(NULL)); |
| 0 | 986 writer->write_u4(0); // instance size |
| 987 writer->write_u2(0); // constant pool | |
| 988 writer->write_u2(0); // static fields | |
| 989 writer->write_u2(0); // instance fields | |
| 990 | |
| 991 // get the array class for the next rank | |
| 992 k = klass->array_klass_or_null(); | |
| 993 } | |
| 994 } | |
| 995 | |
| 996 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 997 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
| 998 | |
| 999 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
| 1000 writer->write_objectID(array); | |
| 1001 writer->write_u4(STACK_TRACE_ID); | |
| 1002 writer->write_u4((u4)array->length()); | |
| 1003 | |
| 1004 // array class ID | |
| 6983 | 1005 writer->write_classID(array->klass()); |
| 0 | 1006 |
| 1007 // [id]* elements | |
| 1008 for (int index=0; index<array->length(); index++) { | |
| 1009 oop o = array->obj_at(index); | |
| 1010 writer->write_objectID(o); | |
| 1011 } | |
| 1012 } | |
| 1013 | |
| 1014 #define WRITE_ARRAY(Array, Type, Size) \ | |
| 1015 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
| 1016 | |
| 1017 | |
| 1018 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 1019 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
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1020 BasicType type = TypeArrayKlass::cast(array->klass())->element_type(); |
| 0 | 1021 |
| 1022 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
| 1023 writer->write_objectID(array); | |
| 1024 writer->write_u4(STACK_TRACE_ID); | |
| 1025 writer->write_u4((u4)array->length()); | |
| 1026 writer->write_u1(type2tag(type)); | |
| 1027 | |
| 1028 // nothing to copy | |
| 1029 if (array->length() == 0) { | |
| 1030 return; | |
| 1031 } | |
| 1032 | |
| 1033 // If the byte ordering is big endian then we can copy most types directly | |
|
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1034 int length_in_bytes = array->length() * type2aelembytes(type); |
| 0 | 1035 assert(length_in_bytes > 0, "nothing to copy"); |
| 1036 | |
| 1037 switch (type) { | |
| 1038 case T_INT : { | |
| 1039 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1040 WRITE_ARRAY(array, int, u4); | |
| 1041 } else { | |
| 1042 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
| 1043 } | |
| 1044 break; | |
| 1045 } | |
| 1046 case T_BYTE : { | |
| 1047 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
| 1048 break; | |
| 1049 } | |
| 1050 case T_CHAR : { | |
| 1051 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1052 WRITE_ARRAY(array, char, u2); | |
| 1053 } else { | |
| 1054 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
| 1055 } | |
| 1056 break; | |
| 1057 } | |
| 1058 case T_SHORT : { | |
| 1059 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1060 WRITE_ARRAY(array, short, u2); | |
| 1061 } else { | |
| 1062 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
| 1063 } | |
| 1064 break; | |
| 1065 } | |
| 1066 case T_BOOLEAN : { | |
| 1067 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1068 WRITE_ARRAY(array, bool, u1); | |
| 1069 } else { | |
| 1070 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
| 1071 } | |
| 1072 break; | |
| 1073 } | |
| 1074 case T_LONG : { | |
| 1075 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1076 WRITE_ARRAY(array, long, u8); | |
| 1077 } else { | |
| 1078 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
| 1079 } | |
| 1080 break; | |
| 1081 } | |
| 1082 | |
| 1083 // handle float/doubles in a special value to ensure than NaNs are | |
| 1084 // written correctly. TO DO: Check if we can avoid this on processors that | |
| 1085 // use IEEE 754. | |
| 1086 | |
| 1087 case T_FLOAT : { | |
| 1088 for (int i=0; i<array->length(); i++) { | |
| 1089 dump_float( writer, array->float_at(i) ); | |
| 1090 } | |
| 1091 break; | |
| 1092 } | |
| 1093 case T_DOUBLE : { | |
| 1094 for (int i=0; i<array->length(); i++) { | |
| 1095 dump_double( writer, array->double_at(i) ); | |
| 1096 } | |
| 1097 break; | |
| 1098 } | |
| 1099 default : ShouldNotReachHere(); | |
| 1100 } | |
| 1101 } | |
| 1102 | |
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1103 // create a HPROF_FRAME record of the given Method* and bci |
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1104 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1105 int frame_serial_num, |
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1106 int class_serial_num, |
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1107 Method* m, |
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1108 int bci) { |
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1109 int line_number; |
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1110 if (m->is_native()) { |
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1111 line_number = -3; // native frame |
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1112 } else { |
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1113 line_number = m->line_number_from_bci(bci); |
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1114 } |
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1115 |
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1116 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1117 writer->write_id(frame_serial_num); // frame serial number |
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1118 writer->write_symbolID(m->name()); // method's name |
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1119 writer->write_symbolID(m->signature()); // method's signature |
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1120 |
|
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1121 assert(m->method_holder()->oop_is_instance(), "not InstanceKlass"); |
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1122 writer->write_symbolID(m->method_holder()->source_file_name()); // source file name |
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1123 writer->write_u4(class_serial_num); // class serial number |
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1124 writer->write_u4((u4) line_number); // line number |
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1125 } |
| 0 | 1126 |
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1127 |
| 0 | 1128 // Support class used to generate HPROF_UTF8 records from the entries in the |
| 1129 // SymbolTable. | |
| 1130 | |
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1131 class SymbolTableDumper : public SymbolClosure { |
| 0 | 1132 private: |
| 1133 DumpWriter* _writer; | |
| 1134 DumpWriter* writer() const { return _writer; } | |
| 1135 public: | |
| 1136 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
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1137 void do_symbol(Symbol** p); |
| 0 | 1138 }; |
| 1139 | |
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1140 void SymbolTableDumper::do_symbol(Symbol** p) { |
| 0 | 1141 ResourceMark rm; |
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1142 Symbol* sym = load_symbol(p); |
| 0 | 1143 int len = sym->utf8_length(); |
| 1144 if (len > 0) { | |
| 1145 char* s = sym->as_utf8(); | |
| 1146 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
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1147 writer()->write_symbolID(sym); |
| 0 | 1148 writer()->write_raw(s, len); |
| 1149 } | |
| 1150 } | |
| 1151 | |
| 1152 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
| 1153 | |
| 1154 class JNILocalsDumper : public OopClosure { | |
| 1155 private: | |
| 1156 DumpWriter* _writer; | |
| 1157 u4 _thread_serial_num; | |
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1158 int _frame_num; |
| 0 | 1159 DumpWriter* writer() const { return _writer; } |
| 1160 public: | |
| 1161 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
| 1162 _writer = writer; | |
| 1163 _thread_serial_num = thread_serial_num; | |
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1164 _frame_num = -1; // default - empty stack |
| 0 | 1165 } |
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1166 void set_frame_number(int n) { _frame_num = n; } |
| 0 | 1167 void do_oop(oop* obj_p); |
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1168 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1169 }; |
| 1170 | |
| 1171 | |
| 1172 void JNILocalsDumper::do_oop(oop* obj_p) { | |
| 1173 // ignore null or deleted handles | |
| 1174 oop o = *obj_p; | |
| 1175 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
| 1176 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
| 1177 writer()->write_objectID(o); | |
| 1178 writer()->write_u4(_thread_serial_num); | |
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1179 writer()->write_u4((u4)_frame_num); |
| 0 | 1180 } |
| 1181 } | |
| 1182 | |
| 1183 | |
| 1184 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
| 1185 | |
| 1186 class JNIGlobalsDumper : public OopClosure { | |
| 1187 private: | |
| 1188 DumpWriter* _writer; | |
| 1189 DumpWriter* writer() const { return _writer; } | |
| 1190 | |
| 1191 public: | |
| 1192 JNIGlobalsDumper(DumpWriter* writer) { | |
| 1193 _writer = writer; | |
| 1194 } | |
| 1195 void do_oop(oop* obj_p); | |
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1196 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1197 }; |
| 1198 | |
| 1199 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
| 1200 oop o = *obj_p; | |
| 1201 | |
| 1202 // ignore these | |
| 1203 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
| 1204 | |
| 1205 // we ignore global ref to symbols and other internal objects | |
| 1206 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
| 1207 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
| 1208 writer()->write_objectID(o); | |
| 1209 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
| 1210 } | |
| 1211 }; | |
| 1212 | |
| 1213 | |
| 1214 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
| 1215 | |
| 1216 class MonitorUsedDumper : public OopClosure { | |
| 1217 private: | |
| 1218 DumpWriter* _writer; | |
| 1219 DumpWriter* writer() const { return _writer; } | |
| 1220 public: | |
| 1221 MonitorUsedDumper(DumpWriter* writer) { | |
| 1222 _writer = writer; | |
| 1223 } | |
| 1224 void do_oop(oop* obj_p) { | |
| 1225 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
| 1226 writer()->write_objectID(*obj_p); | |
| 1227 } | |
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1228 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1229 }; |
| 1230 | |
| 1231 | |
| 1232 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
| 1233 | |
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1234 class StickyClassDumper : public KlassClosure { |
| 0 | 1235 private: |
| 1236 DumpWriter* _writer; | |
| 1237 DumpWriter* writer() const { return _writer; } | |
| 1238 public: | |
| 1239 StickyClassDumper(DumpWriter* writer) { | |
| 1240 _writer = writer; | |
| 1241 } | |
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1242 void do_klass(Klass* k) { |
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1243 if (k->oop_is_instance()) { |
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1244 InstanceKlass* ik = InstanceKlass::cast(k); |
| 0 | 1245 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); |
| 1246 writer()->write_classID(ik); | |
| 1247 } | |
| 1248 } | |
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1249 }; |
| 0 | 1250 |
| 1251 | |
| 1252 class VM_HeapDumper; | |
| 1253 | |
| 1254 // Support class using when iterating over the heap. | |
| 1255 | |
| 1256 class HeapObjectDumper : public ObjectClosure { | |
| 1257 private: | |
| 1258 VM_HeapDumper* _dumper; | |
| 1259 DumpWriter* _writer; | |
| 1260 | |
| 1261 VM_HeapDumper* dumper() { return _dumper; } | |
| 1262 DumpWriter* writer() { return _writer; } | |
| 1263 | |
| 1264 // used to indicate that a record has been writen | |
| 1265 void mark_end_of_record(); | |
| 1266 | |
| 1267 public: | |
| 1268 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
| 1269 _dumper = dumper; | |
| 1270 _writer = writer; | |
| 1271 } | |
| 1272 | |
| 1273 // called for each object in the heap | |
| 1274 void do_object(oop o); | |
| 1275 }; | |
| 1276 | |
| 1277 void HeapObjectDumper::do_object(oop o) { | |
| 1278 // hide the sentinel for deleted handles | |
| 1279 if (o == JNIHandles::deleted_handle()) return; | |
| 1280 | |
| 1281 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
| 1142 | 1282 if (o->klass() == SystemDictionary::Class_klass()) { |
| 0 | 1283 if (!java_lang_Class::is_primitive(o)) { |
| 1284 return; | |
| 1285 } | |
| 1286 } | |
| 1287 | |
| 1288 // create a HPROF_GC_INSTANCE record for each object | |
| 1289 if (o->is_instance()) { | |
| 1290 DumperSupport::dump_instance(writer(), o); | |
| 1291 mark_end_of_record(); | |
| 1292 } else { | |
| 1293 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
| 1294 if (o->is_objArray()) { | |
| 1295 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
| 1296 mark_end_of_record(); | |
| 1297 } else { | |
| 1298 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
| 1299 if (o->is_typeArray()) { | |
| 1300 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
| 1301 mark_end_of_record(); | |
| 1302 } | |
| 1303 } | |
| 1304 } | |
| 1305 } | |
| 1306 | |
| 1307 // The VM operation that performs the heap dump | |
| 1308 class VM_HeapDumper : public VM_GC_Operation { | |
| 1309 private: | |
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1310 static VM_HeapDumper* _global_dumper; |
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1311 static DumpWriter* _global_writer; |
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1312 DumpWriter* _local_writer; |
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1313 JavaThread* _oome_thread; |
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1314 Method* _oome_constructor; |
| 0 | 1315 bool _gc_before_heap_dump; |
| 1316 bool _is_segmented_dump; | |
| 1317 jlong _dump_start; | |
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1318 GrowableArray<Klass*>* _klass_map; |
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1319 ThreadStackTrace** _stack_traces; |
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1320 int _num_threads; |
| 0 | 1321 |
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1322 // accessors and setters |
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1323 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1324 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1325 void set_global_dumper() { |
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1326 assert(_global_dumper == NULL, "Error"); |
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1327 _global_dumper = this; |
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1328 } |
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1329 void set_global_writer() { |
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1330 assert(_global_writer == NULL, "Error"); |
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1331 _global_writer = _local_writer; |
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1332 } |
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1333 void clear_global_dumper() { _global_dumper = NULL; } |
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1334 void clear_global_writer() { _global_writer = NULL; } |
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1335 |
| 0 | 1336 bool is_segmented_dump() const { return _is_segmented_dump; } |
| 1337 void set_segmented_dump() { _is_segmented_dump = true; } | |
| 1338 jlong dump_start() const { return _dump_start; } | |
| 1339 void set_dump_start(jlong pos); | |
| 1340 | |
| 1341 bool skip_operation() const; | |
| 1342 | |
| 1343 // writes a HPROF_LOAD_CLASS record | |
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1344 static void do_load_class(Klass* k); |
| 0 | 1345 |
| 1346 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1347 // (and each array class too) | |
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1348 static void do_class_dump(Klass* k); |
| 0 | 1349 |
| 1350 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1351 // array (and each multi-dimensional array too) | |
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1352 static void do_basic_type_array_class_dump(Klass* k); |
| 0 | 1353 |
| 1354 // HPROF_GC_ROOT_THREAD_OBJ records | |
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1355 int do_thread(JavaThread* thread, u4 thread_serial_num); |
| 0 | 1356 void do_threads(); |
| 1357 | |
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1358 void add_class_serial_number(Klass* k, int serial_num) { |
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1359 _klass_map->at_put_grow(serial_num, k); |
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1360 } |
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1361 |
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1362 // HPROF_TRACE and HPROF_FRAME records |
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1363 void dump_stack_traces(); |
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1364 |
| 0 | 1365 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
| 1366 void write_dump_header(); | |
| 1367 | |
| 1368 // fixes up the length of the current dump record | |
| 1369 void write_current_dump_record_length(); | |
| 1370 | |
| 1371 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1372 // record in the case of a segmented heap dump) | |
| 1373 void end_of_dump(); | |
| 1374 | |
| 1375 public: | |
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1376 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : |
| 0 | 1377 VM_GC_Operation(0 /* total collections, dummy, ignored */, |
| 2225 | 1378 GCCause::_heap_dump /* GC Cause */, |
| 0 | 1379 0 /* total full collections, dummy, ignored */, |
| 1380 gc_before_heap_dump) { | |
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1381 _local_writer = writer; |
| 0 | 1382 _gc_before_heap_dump = gc_before_heap_dump; |
| 1383 _is_segmented_dump = false; | |
| 1384 _dump_start = (jlong)-1; | |
| 6197 | 1385 _klass_map = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1386 _stack_traces = NULL; |
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1387 _num_threads = 0; |
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1388 if (oome) { |
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1389 assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); |
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1390 // get OutOfMemoryError zero-parameter constructor |
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1391 InstanceKlass* oome_ik = InstanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); |
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1392 _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), |
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1393 vmSymbols::void_method_signature()); |
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1394 // get thread throwing OOME when generating the heap dump at OOME |
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1395 _oome_thread = JavaThread::current(); |
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1396 } else { |
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1397 _oome_thread = NULL; |
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1398 _oome_constructor = NULL; |
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1399 } |
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1400 } |
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1401 ~VM_HeapDumper() { |
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1402 if (_stack_traces != NULL) { |
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1403 for (int i=0; i < _num_threads; i++) { |
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1404 delete _stack_traces[i]; |
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1405 } |
| 6197 | 1406 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces, mtInternal); |
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1407 } |
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1408 delete _klass_map; |
| 0 | 1409 } |
| 1410 | |
| 1411 VMOp_Type type() const { return VMOp_HeapDumper; } | |
| 1412 // used to mark sub-record boundary | |
| 1413 void check_segment_length(); | |
| 1414 void doit(); | |
| 1415 }; | |
| 1416 | |
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1417 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1418 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1419 |
| 0 | 1420 bool VM_HeapDumper::skip_operation() const { |
| 1421 return false; | |
| 1422 } | |
| 1423 | |
| 1424 // sets the dump starting position | |
| 1425 void VM_HeapDumper::set_dump_start(jlong pos) { | |
| 1426 _dump_start = pos; | |
| 1427 } | |
| 1428 | |
| 1429 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
| 1430 void VM_HeapDumper::write_dump_header() { | |
| 1431 if (writer()->is_open()) { | |
| 1432 if (is_segmented_dump()) { | |
| 1433 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
| 1434 } else { | |
| 1435 writer()->write_u1(HPROF_HEAP_DUMP); | |
| 1436 } | |
| 1437 writer()->write_u4(0); // current ticks | |
| 1438 | |
| 1439 // record the starting position for the dump (its length will be fixed up later) | |
| 1440 set_dump_start(writer()->current_offset()); | |
| 1441 writer()->write_u4(0); | |
| 1442 } | |
| 1443 } | |
| 1444 | |
| 1445 // fixes up the length of the current dump record | |
| 1446 void VM_HeapDumper::write_current_dump_record_length() { | |
| 1447 if (writer()->is_open()) { | |
| 1448 assert(dump_start() >= 0, "no dump start recorded"); | |
| 1449 | |
| 1450 // calculate the size of the dump record | |
| 1451 jlong dump_end = writer()->current_offset(); | |
| 1452 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1453 | |
| 1454 // record length must fit in a u4 | |
| 1455 if (dump_len > (jlong)(4L*(jlong)G)) { | |
| 1456 warning("record is too large"); | |
| 1457 } | |
| 1458 | |
| 1459 // seek to the dump start and fix-up the length | |
| 1460 writer()->seek_to_offset(dump_start()); | |
| 1461 writer()->write_u4((u4)dump_len); | |
| 1462 | |
| 1463 // adjust the total size written to keep the bytes written correct. | |
| 1464 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
| 1465 | |
| 1466 // seek to dump end so we can continue | |
| 1467 writer()->seek_to_offset(dump_end); | |
| 1468 | |
| 1469 // no current dump record | |
| 1470 set_dump_start((jlong)-1); | |
| 1471 } | |
| 1472 } | |
| 1473 | |
| 1474 // used on a sub-record boundary to check if we need to start a | |
| 1475 // new segment. | |
| 1476 void VM_HeapDumper::check_segment_length() { | |
| 1477 if (writer()->is_open()) { | |
| 1478 if (is_segmented_dump()) { | |
| 1479 // don't use current_offset that would be too expensive on a per record basis | |
| 1480 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
| 1481 assert(dump_end == writer()->current_offset(), "checking"); | |
| 1482 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1483 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
| 1484 | |
| 1485 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
| 1486 write_current_dump_record_length(); | |
| 1487 write_dump_header(); | |
| 1488 } | |
| 1489 } | |
| 1490 } | |
| 1491 } | |
| 1492 | |
| 1493 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1494 // record in the case of a segmented heap dump) | |
| 1495 void VM_HeapDumper::end_of_dump() { | |
| 1496 if (writer()->is_open()) { | |
| 1497 write_current_dump_record_length(); | |
| 1498 | |
| 1499 // for segmented dump we write the end record | |
| 1500 if (is_segmented_dump()) { | |
| 1501 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
| 1502 writer()->write_u4(0); | |
| 1503 writer()->write_u4(0); | |
| 1504 } | |
| 1505 } | |
| 1506 } | |
| 1507 | |
| 1508 // marks sub-record boundary | |
| 1509 void HeapObjectDumper::mark_end_of_record() { | |
| 1510 dumper()->check_segment_length(); | |
| 1511 } | |
| 1512 | |
| 1513 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
| 1514 // array classes) | |
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1515 void VM_HeapDumper::do_load_class(Klass* k) { |
| 0 | 1516 static u4 class_serial_num = 0; |
| 1517 | |
| 1518 // len of HPROF_LOAD_CLASS record | |
| 1519 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
| 1520 | |
| 1521 // write a HPROF_LOAD_CLASS for the class and each array class | |
| 1522 do { | |
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1523 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
| 0 | 1524 |
| 1525 // class serial number is just a number | |
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1526 writer()->write_u4(++class_serial_num); |
| 0 | 1527 |
| 1528 // class ID | |
| 6983 | 1529 Klass* klass = k; |
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1530 writer()->write_classID(klass); |
| 0 | 1531 |
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1532 // add the Klass* and class serial number pair |
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1533 dumper()->add_class_serial_number(klass, class_serial_num); |
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1534 |
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1535 writer()->write_u4(STACK_TRACE_ID); |
| 0 | 1536 |
| 1537 // class name ID | |
|
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1538 Symbol* name = klass->name(); |
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1539 writer()->write_symbolID(name); |
| 0 | 1540 |
| 1541 // write a LOAD_CLASS record for the array type (if it exists) | |
| 1542 k = klass->array_klass_or_null(); | |
| 1543 } while (k != NULL); | |
| 1544 } | |
| 1545 | |
| 1546 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
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1547 void VM_HeapDumper::do_class_dump(Klass* k) { |
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1548 DumperSupport::dump_class_and_array_classes(writer(), k); |
| 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) { |
|
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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; |
|
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1580 int extra_frames = 0; |
| 0 | 1581 |
|
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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); | |
|
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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 | |
| 1725 SystemDictionary::classes_do(&do_load_class); | |
| 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 | |
| 1736 SystemDictionary::classes_do(&do_class_dump); | |
| 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. | |
| 1831 int HeapDumper::dump(const char* path) { | |
| 1832 assert(path != NULL && strlen(path) > 0, "path missing"); | |
| 1833 | |
| 1834 // print message in interactive case | |
| 1835 if (print_to_tty()) { | |
| 1836 tty->print_cr("Dumping heap to %s ...", path); | |
| 1837 timer()->start(); | |
| 1838 } | |
| 1839 | |
| 1840 // create the dump writer. If the file can be opened then bail | |
| 1841 DumpWriter writer(path); | |
| 1842 if (!writer.is_open()) { | |
| 1843 set_error(writer.error()); | |
| 1844 if (print_to_tty()) { | |
| 1845 tty->print_cr("Unable to create %s: %s", path, | |
| 1846 (error() != NULL) ? error() : "reason unknown"); | |
| 1847 } | |
| 1848 return -1; | |
| 1849 } | |
| 1850 | |
| 1851 // generate the dump | |
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1852 VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); |
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1853 if (Thread::current()->is_VM_thread()) { |
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1854 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1855 dumper.doit(); |
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1856 } else { |
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1857 VMThread::execute(&dumper); |
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1858 } |
| 0 | 1859 |
| 1860 // close dump file and record any error that the writer may have encountered | |
| 1861 writer.close(); | |
| 1862 set_error(writer.error()); | |
| 1863 | |
| 1864 // print message in interactive case | |
| 1865 if (print_to_tty()) { | |
| 1866 timer()->stop(); | |
| 1867 if (error() == NULL) { | |
| 1868 char msg[256]; | |
| 1869 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
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1870 JLONG_FORMAT, timer()->seconds()); |
| 0 | 1871 tty->print_cr(msg, writer.bytes_written()); |
| 1872 } else { | |
| 1873 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
| 1874 } | |
| 1875 } | |
| 1876 | |
| 1877 return (writer.error() == NULL) ? 0 : -1; | |
| 1878 } | |
| 1879 | |
| 1880 // stop timer (if still active), and free any error string we might be holding | |
| 1881 HeapDumper::~HeapDumper() { | |
| 1882 if (timer()->is_active()) { | |
| 1883 timer()->stop(); | |
| 1884 } | |
| 1885 set_error(NULL); | |
| 1886 } | |
| 1887 | |
| 1888 | |
| 1889 // returns the error string (resource allocated), or NULL | |
| 1890 char* HeapDumper::error_as_C_string() const { | |
| 1891 if (error() != NULL) { | |
| 1892 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
| 1893 strcpy(str, error()); | |
| 1894 return str; | |
| 1895 } else { | |
| 1896 return NULL; | |
| 1897 } | |
| 1898 } | |
| 1899 | |
| 1900 // set the error string | |
| 1901 void HeapDumper::set_error(char* error) { | |
| 1902 if (_error != NULL) { | |
| 1903 os::free(_error); | |
| 1904 } | |
| 1905 if (error == NULL) { | |
| 1906 _error = NULL; | |
| 1907 } else { | |
| 1908 _error = os::strdup(error); | |
| 1909 assert(_error != NULL, "allocation failure"); | |
| 1910 } | |
| 1911 } | |
| 1912 | |
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1913 // Called by out-of-memory error reporting by a single Java thread |
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1914 // outside of a JVM safepoint |
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1915 void HeapDumper::dump_heap_from_oome() { |
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1916 HeapDumper::dump_heap(true); |
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1917 } |
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1918 |
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1919 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1920 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1921 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1922 // general use, however, this method will need modification to prevent |
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1923 // inteference when updating the static variables base_path and dump_file_seq below. |
| 0 | 1924 void HeapDumper::dump_heap() { |
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1925 HeapDumper::dump_heap(false); |
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1926 } |
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1927 |
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1928 void HeapDumper::dump_heap(bool oome) { |
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1929 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1930 static uint dump_file_seq = 0; |
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1931 char* my_path; |
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1932 const int max_digit_chars = 20; |
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1933 |
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1934 const char* dump_file_name = "java_pid"; |
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1935 const char* dump_file_ext = ".hprof"; |
| 0 | 1936 |
| 1937 // The dump file defaults to java_pid<pid>.hprof in the current working | |
| 1938 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
| 1939 // dump file name or a directory where dump file is created. | |
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1940 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1941 // Calculate potentially longest base path and check if we have enough |
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1942 // allocated statically. |
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1943 const size_t total_length = |
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1944 (HeapDumpPath == NULL ? 0 : strlen(HeapDumpPath)) + |
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1945 strlen(os::file_separator()) + max_digit_chars + |
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1946 strlen(dump_file_name) + strlen(dump_file_ext) + 1; |
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1947 if (total_length > sizeof(base_path)) { |
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1948 warning("Cannot create heap dump file. HeapDumpPath is too long."); |
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1949 return; |
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1950 } |
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1951 |
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1952 bool use_default_filename = true; |
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1953 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1954 // HeapDumpPath=<file> not specified |
| 0 | 1955 } else { |
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1956 strncpy(base_path, HeapDumpPath, sizeof(base_path)); |
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1957 // check if the path is a directory (must exist) |
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1958 DIR* dir = os::opendir(base_path); |
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1959 if (dir == NULL) { |
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1960 use_default_filename = false; |
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1961 } else { |
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1962 // HeapDumpPath specified a directory. We append a file separator |
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1963 // (if needed). |
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1964 os::closedir(dir); |
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1965 size_t fs_len = strlen(os::file_separator()); |
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1966 if (strlen(base_path) >= fs_len) { |
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1967 char* end = base_path; |
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1968 end += (strlen(base_path) - fs_len); |
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1969 if (strcmp(end, os::file_separator()) != 0) { |
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1970 strcat(base_path, os::file_separator()); |
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1971 } |
| 0 | 1972 } |
| 1973 } | |
| 1974 } | |
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1975 // If HeapDumpPath wasn't a file name then we append the default name |
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1976 if (use_default_filename) { |
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1977 const size_t dlen = strlen(base_path); // if heap dump dir specified |
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1978 jio_snprintf(&base_path[dlen], sizeof(base_path)-dlen, "%s%d%s", |
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1979 dump_file_name, os::current_process_id(), dump_file_ext); |
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1980 } |
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1981 const size_t len = strlen(base_path) + 1; |
| 6197 | 1982 my_path = (char*)os::malloc(len, mtInternal); |
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1983 if (my_path == NULL) { |
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1984 warning("Cannot create heap dump file. Out of system memory."); |
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1985 return; |
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1986 } |
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1987 strncpy(my_path, base_path, len); |
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1988 } else { |
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1989 // Append a sequence number id for dumps following the first |
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1990 const size_t len = strlen(base_path) + max_digit_chars + 2; // for '.' and \0 |
| 6197 | 1991 my_path = (char*)os::malloc(len, mtInternal); |
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1992 if (my_path == NULL) { |
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1993 warning("Cannot create heap dump file. Out of system memory."); |
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1994 return; |
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1995 } |
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1996 jio_snprintf(my_path, len, "%s.%d", base_path, dump_file_seq); |
| 0 | 1997 } |
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1998 dump_file_seq++; // increment seq number for next time we dump |
| 0 | 1999 |
| 2000 HeapDumper dumper(false /* no GC before heap dump */, | |
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2001 true /* send to tty */, |
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2002 oome /* pass along out-of-memory-error flag */); |
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2003 dumper.dump(my_path); |
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2004 os::free(my_path); |
| 0 | 2005 } |