Mercurial > hg > truffle
annotate src/share/vm/services/heapDumper.cpp @ 615:c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung
| author | ysr |
|---|---|
| date | Mon, 02 Mar 2009 16:37:04 -0800 |
| parents | e9be0e04635a |
| children | 7bb995fbd3c0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2005-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_heapDumper.cpp.incl" | |
| 27 | |
| 28 /* | |
| 29 * HPROF binary format - description copied from: | |
| 30 * src/share/demo/jvmti/hprof/hprof_io.c | |
| 31 * | |
| 32 * | |
| 33 * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" | |
| 34 * (0-terminated) | |
| 35 * | |
| 36 * u4 size of identifiers. Identifiers are used to represent | |
| 37 * UTF8 strings, objects, stack traces, etc. They usually | |
| 38 * have the same size as host pointers. For example, on | |
| 39 * Solaris and Win32, the size is 4. | |
| 40 * u4 high word | |
| 41 * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 | |
| 42 * [record]* a sequence of records. | |
| 43 * | |
| 44 * | |
| 45 * Record format: | |
| 46 * | |
| 47 * u1 a TAG denoting the type of the record | |
| 48 * u4 number of *microseconds* since the time stamp in the | |
| 49 * header. (wraps around in a little more than an hour) | |
| 50 * u4 number of bytes *remaining* in the record. Note that | |
| 51 * this number excludes the tag and the length field itself. | |
| 52 * [u1]* BODY of the record (a sequence of bytes) | |
| 53 * | |
| 54 * | |
| 55 * The following TAGs are supported: | |
| 56 * | |
| 57 * TAG BODY notes | |
| 58 *---------------------------------------------------------- | |
| 59 * HPROF_UTF8 a UTF8-encoded name | |
| 60 * | |
| 61 * id name ID | |
| 62 * [u1]* UTF8 characters (no trailing zero) | |
| 63 * | |
| 64 * HPROF_LOAD_CLASS a newly loaded class | |
| 65 * | |
| 66 * u4 class serial number (> 0) | |
| 67 * id class object ID | |
| 68 * u4 stack trace serial number | |
| 69 * id class name ID | |
| 70 * | |
| 71 * HPROF_UNLOAD_CLASS an unloading class | |
| 72 * | |
| 73 * u4 class serial_number | |
| 74 * | |
| 75 * HPROF_FRAME a Java stack frame | |
| 76 * | |
| 77 * id stack frame ID | |
| 78 * id method name ID | |
| 79 * id method signature ID | |
| 80 * id source file name ID | |
| 81 * u4 class serial number | |
| 82 * i4 line number. >0: normal | |
| 83 * -1: unknown | |
| 84 * -2: compiled method | |
| 85 * -3: native method | |
| 86 * | |
| 87 * HPROF_TRACE a Java stack trace | |
| 88 * | |
| 89 * u4 stack trace serial number | |
| 90 * u4 thread serial number | |
| 91 * u4 number of frames | |
| 92 * [id]* stack frame IDs | |
| 93 * | |
| 94 * | |
| 95 * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC | |
| 96 * | |
| 97 * u2 flags 0x0001: incremental vs. complete | |
| 98 * 0x0002: sorted by allocation vs. live | |
| 99 * 0x0004: whether to force a GC | |
| 100 * u4 cutoff ratio | |
| 101 * u4 total live bytes | |
| 102 * u4 total live instances | |
| 103 * u8 total bytes allocated | |
| 104 * u8 total instances allocated | |
| 105 * u4 number of sites that follow | |
| 106 * [u1 is_array: 0: normal object | |
| 107 * 2: object array | |
| 108 * 4: boolean array | |
| 109 * 5: char array | |
| 110 * 6: float array | |
| 111 * 7: double array | |
| 112 * 8: byte array | |
| 113 * 9: short array | |
| 114 * 10: int array | |
| 115 * 11: long array | |
| 116 * u4 class serial number (may be zero during startup) | |
| 117 * u4 stack trace serial number | |
| 118 * u4 number of bytes alive | |
| 119 * u4 number of instances alive | |
| 120 * u4 number of bytes allocated | |
| 121 * u4]* number of instance allocated | |
| 122 * | |
| 123 * HPROF_START_THREAD a newly started thread. | |
| 124 * | |
| 125 * u4 thread serial number (> 0) | |
| 126 * id thread object ID | |
| 127 * u4 stack trace serial number | |
| 128 * id thread name ID | |
| 129 * id thread group name ID | |
| 130 * id thread group parent name ID | |
| 131 * | |
| 132 * HPROF_END_THREAD a terminating thread. | |
| 133 * | |
| 134 * u4 thread serial number | |
| 135 * | |
| 136 * HPROF_HEAP_SUMMARY heap summary | |
| 137 * | |
| 138 * u4 total live bytes | |
| 139 * u4 total live instances | |
| 140 * u8 total bytes allocated | |
| 141 * u8 total instances allocated | |
| 142 * | |
| 143 * HPROF_HEAP_DUMP denote a heap dump | |
| 144 * | |
| 145 * [heap dump sub-records]* | |
| 146 * | |
| 147 * There are four kinds of heap dump sub-records: | |
| 148 * | |
| 149 * u1 sub-record type | |
| 150 * | |
| 151 * HPROF_GC_ROOT_UNKNOWN unknown root | |
| 152 * | |
| 153 * id object ID | |
| 154 * | |
| 155 * HPROF_GC_ROOT_THREAD_OBJ thread object | |
| 156 * | |
| 157 * id thread object ID (may be 0 for a | |
| 158 * thread newly attached through JNI) | |
| 159 * u4 thread sequence number | |
| 160 * u4 stack trace sequence number | |
| 161 * | |
| 162 * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root | |
| 163 * | |
| 164 * id object ID | |
| 165 * id JNI global ref ID | |
| 166 * | |
| 167 * HPROF_GC_ROOT_JNI_LOCAL JNI local ref | |
| 168 * | |
| 169 * id object ID | |
| 170 * u4 thread serial number | |
| 171 * u4 frame # in stack trace (-1 for empty) | |
| 172 * | |
| 173 * HPROF_GC_ROOT_JAVA_FRAME Java stack frame | |
| 174 * | |
| 175 * id object ID | |
| 176 * u4 thread serial number | |
| 177 * u4 frame # in stack trace (-1 for empty) | |
| 178 * | |
| 179 * HPROF_GC_ROOT_NATIVE_STACK Native stack | |
| 180 * | |
| 181 * id object ID | |
| 182 * u4 thread serial number | |
| 183 * | |
| 184 * HPROF_GC_ROOT_STICKY_CLASS System class | |
| 185 * | |
| 186 * id object ID | |
| 187 * | |
| 188 * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block | |
| 189 * | |
| 190 * id object ID | |
| 191 * u4 thread serial number | |
| 192 * | |
| 193 * HPROF_GC_ROOT_MONITOR_USED Busy monitor | |
| 194 * | |
| 195 * id object ID | |
| 196 * | |
| 197 * HPROF_GC_CLASS_DUMP dump of a class object | |
| 198 * | |
| 199 * id class object ID | |
| 200 * u4 stack trace serial number | |
| 201 * id super class object ID | |
| 202 * id class loader object ID | |
| 203 * id signers object ID | |
| 204 * id protection domain object ID | |
| 205 * id reserved | |
| 206 * id reserved | |
| 207 * | |
| 208 * u4 instance size (in bytes) | |
| 209 * | |
| 210 * u2 size of constant pool | |
| 211 * [u2, constant pool index, | |
| 212 * ty, type | |
| 213 * 2: object | |
| 214 * 4: boolean | |
| 215 * 5: char | |
| 216 * 6: float | |
| 217 * 7: double | |
| 218 * 8: byte | |
| 219 * 9: short | |
| 220 * 10: int | |
| 221 * 11: long | |
| 222 * vl]* and value | |
| 223 * | |
| 224 * u2 number of static fields | |
| 225 * [id, static field name, | |
| 226 * ty, type, | |
| 227 * vl]* and value | |
| 228 * | |
| 229 * u2 number of inst. fields (not inc. super) | |
| 230 * [id, instance field name, | |
| 231 * ty]* type | |
| 232 * | |
| 233 * HPROF_GC_INSTANCE_DUMP dump of a normal object | |
| 234 * | |
| 235 * id object ID | |
| 236 * u4 stack trace serial number | |
| 237 * id class object ID | |
| 238 * u4 number of bytes that follow | |
| 239 * [vl]* instance field values (class, followed | |
| 240 * by super, super's super ...) | |
| 241 * | |
| 242 * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array | |
| 243 * | |
| 244 * id array object ID | |
| 245 * u4 stack trace serial number | |
| 246 * u4 number of elements | |
| 247 * id array class ID | |
| 248 * [id]* elements | |
| 249 * | |
| 250 * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array | |
| 251 * | |
| 252 * id array object ID | |
| 253 * u4 stack trace serial number | |
| 254 * u4 number of elements | |
| 255 * u1 element type | |
| 256 * 4: boolean array | |
| 257 * 5: char array | |
| 258 * 6: float array | |
| 259 * 7: double array | |
| 260 * 8: byte array | |
| 261 * 9: short array | |
| 262 * 10: int array | |
| 263 * 11: long array | |
| 264 * [u1]* elements | |
| 265 * | |
| 266 * HPROF_CPU_SAMPLES a set of sample traces of running threads | |
| 267 * | |
| 268 * u4 total number of samples | |
| 269 * u4 # of traces | |
| 270 * [u4 # of samples | |
| 271 * u4]* stack trace serial number | |
| 272 * | |
| 273 * HPROF_CONTROL_SETTINGS the settings of on/off switches | |
| 274 * | |
| 275 * u4 0x00000001: alloc traces on/off | |
| 276 * 0x00000002: cpu sampling on/off | |
| 277 * u2 stack trace depth | |
| 278 * | |
| 279 * | |
| 280 * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally | |
| 281 * be generated as a sequence of heap dump segments. This sequence is | |
| 282 * terminated by an end record. The additional tags allowed by format | |
| 283 * "JAVA PROFILE 1.0.2" are: | |
| 284 * | |
| 285 * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment | |
| 286 * | |
| 287 * [heap dump sub-records]* | |
| 288 * The same sub-record types allowed by HPROF_HEAP_DUMP | |
| 289 * | |
| 290 * HPROF_HEAP_DUMP_END denotes the end of a heap dump | |
| 291 * | |
| 292 */ | |
| 293 | |
| 294 | |
| 295 // HPROF tags | |
| 296 | |
| 297 typedef enum { | |
| 298 // top-level records | |
| 299 HPROF_UTF8 = 0x01, | |
| 300 HPROF_LOAD_CLASS = 0x02, | |
| 301 HPROF_UNLOAD_CLASS = 0x03, | |
| 302 HPROF_FRAME = 0x04, | |
| 303 HPROF_TRACE = 0x05, | |
| 304 HPROF_ALLOC_SITES = 0x06, | |
| 305 HPROF_HEAP_SUMMARY = 0x07, | |
| 306 HPROF_START_THREAD = 0x0A, | |
| 307 HPROF_END_THREAD = 0x0B, | |
| 308 HPROF_HEAP_DUMP = 0x0C, | |
| 309 HPROF_CPU_SAMPLES = 0x0D, | |
| 310 HPROF_CONTROL_SETTINGS = 0x0E, | |
| 311 | |
| 312 // 1.0.2 record types | |
| 313 HPROF_HEAP_DUMP_SEGMENT = 0x1C, | |
| 314 HPROF_HEAP_DUMP_END = 0x2C, | |
| 315 | |
| 316 // field types | |
| 317 HPROF_ARRAY_OBJECT = 0x01, | |
| 318 HPROF_NORMAL_OBJECT = 0x02, | |
| 319 HPROF_BOOLEAN = 0x04, | |
| 320 HPROF_CHAR = 0x05, | |
| 321 HPROF_FLOAT = 0x06, | |
| 322 HPROF_DOUBLE = 0x07, | |
| 323 HPROF_BYTE = 0x08, | |
| 324 HPROF_SHORT = 0x09, | |
| 325 HPROF_INT = 0x0A, | |
| 326 HPROF_LONG = 0x0B, | |
| 327 | |
| 328 // data-dump sub-records | |
| 329 HPROF_GC_ROOT_UNKNOWN = 0xFF, | |
| 330 HPROF_GC_ROOT_JNI_GLOBAL = 0x01, | |
| 331 HPROF_GC_ROOT_JNI_LOCAL = 0x02, | |
| 332 HPROF_GC_ROOT_JAVA_FRAME = 0x03, | |
| 333 HPROF_GC_ROOT_NATIVE_STACK = 0x04, | |
| 334 HPROF_GC_ROOT_STICKY_CLASS = 0x05, | |
| 335 HPROF_GC_ROOT_THREAD_BLOCK = 0x06, | |
| 336 HPROF_GC_ROOT_MONITOR_USED = 0x07, | |
| 337 HPROF_GC_ROOT_THREAD_OBJ = 0x08, | |
| 338 HPROF_GC_CLASS_DUMP = 0x20, | |
| 339 HPROF_GC_INSTANCE_DUMP = 0x21, | |
| 340 HPROF_GC_OBJ_ARRAY_DUMP = 0x22, | |
| 341 HPROF_GC_PRIM_ARRAY_DUMP = 0x23 | |
| 342 } hprofTag; | |
| 343 | |
| 344 // Default stack trace ID (used for dummy HPROF_TRACE record) | |
| 345 enum { | |
|
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346 STACK_TRACE_ID = 1, |
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347 INITIAL_CLASS_COUNT = 200 |
| 0 | 348 }; |
| 349 | |
| 350 // Supports I/O operations on a dump file | |
| 351 | |
| 352 class DumpWriter : public StackObj { | |
| 353 private: | |
| 354 enum { | |
| 355 io_buffer_size = 8*M | |
| 356 }; | |
| 357 | |
| 358 int _fd; // file descriptor (-1 if dump file not open) | |
| 359 jlong _bytes_written; // number of byte written to dump file | |
| 360 | |
| 361 char* _buffer; // internal buffer | |
| 362 int _size; | |
| 363 int _pos; | |
| 364 | |
| 365 char* _error; // error message when I/O fails | |
| 366 | |
| 367 void set_file_descriptor(int fd) { _fd = fd; } | |
| 368 int file_descriptor() const { return _fd; } | |
| 369 | |
| 370 char* buffer() const { return _buffer; } | |
| 371 int buffer_size() const { return _size; } | |
| 372 int position() const { return _pos; } | |
| 373 void set_position(int pos) { _pos = pos; } | |
| 374 | |
| 375 void set_error(const char* error) { _error = (char*)os::strdup(error); } | |
| 376 | |
| 377 // all I/O go through this function | |
| 378 void write_internal(void* s, int len); | |
| 379 | |
| 380 public: | |
| 381 DumpWriter(const char* path); | |
| 382 ~DumpWriter(); | |
| 383 | |
| 384 void close(); | |
| 385 bool is_open() const { return file_descriptor() >= 0; } | |
| 386 void flush(); | |
| 387 | |
| 388 // total number of bytes written to the disk | |
| 389 jlong bytes_written() const { return _bytes_written; } | |
| 390 | |
| 391 // adjust the number of bytes written to disk (used to keep the count | |
| 392 // of the number of bytes written in case of rewrites) | |
| 393 void adjust_bytes_written(jlong n) { _bytes_written += n; } | |
| 394 | |
| 395 // number of (buffered) bytes as yet unwritten to the dump file | |
| 396 jlong bytes_unwritten() const { return (jlong)position(); } | |
| 397 | |
| 398 char* error() const { return _error; } | |
| 399 | |
| 400 jlong current_offset(); | |
| 401 void seek_to_offset(jlong pos); | |
| 402 | |
| 403 // writer functions | |
| 404 void write_raw(void* s, int len); | |
| 405 void write_u1(u1 x) { write_raw((void*)&x, 1); } | |
| 406 void write_u2(u2 x); | |
| 407 void write_u4(u4 x); | |
| 408 void write_u8(u8 x); | |
| 409 void write_objectID(oop o); | |
| 410 void write_classID(Klass* k); | |
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411 void write_id(u4 x); |
| 0 | 412 }; |
| 413 | |
| 414 DumpWriter::DumpWriter(const char* path) { | |
| 415 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
| 416 // sufficient memory then reduce size until we can allocate something. | |
| 417 _size = io_buffer_size; | |
| 418 do { | |
| 419 _buffer = (char*)os::malloc(_size); | |
| 420 if (_buffer == NULL) { | |
| 421 _size = _size >> 1; | |
| 422 } | |
| 423 } while (_buffer == NULL && _size > 0); | |
| 424 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
| 425 _pos = 0; | |
| 426 _error = NULL; | |
| 427 _bytes_written = 0L; | |
| 428 _fd = os::create_binary_file(path, false); // don't replace existing file | |
| 429 | |
| 430 // if the open failed we record the error | |
| 431 if (_fd < 0) { | |
| 432 _error = (char*)os::strdup(strerror(errno)); | |
| 433 } | |
| 434 } | |
| 435 | |
| 436 DumpWriter::~DumpWriter() { | |
| 437 // flush and close dump file | |
| 438 if (file_descriptor() >= 0) { | |
| 439 close(); | |
| 440 } | |
| 441 if (_buffer != NULL) os::free(_buffer); | |
| 442 if (_error != NULL) os::free(_error); | |
| 443 } | |
| 444 | |
| 445 // closes dump file (if open) | |
| 446 void DumpWriter::close() { | |
| 447 // flush and close dump file | |
| 448 if (file_descriptor() >= 0) { | |
| 449 flush(); | |
| 450 ::close(file_descriptor()); | |
| 451 } | |
| 452 } | |
| 453 | |
| 454 // write directly to the file | |
| 455 void DumpWriter::write_internal(void* s, int len) { | |
| 456 if (is_open()) { | |
| 457 int n = ::write(file_descriptor(), s, len); | |
| 458 if (n > 0) { | |
| 459 _bytes_written += n; | |
| 460 } | |
| 461 if (n != len) { | |
| 462 if (n < 0) { | |
| 463 set_error(strerror(errno)); | |
| 464 } else { | |
| 465 set_error("file size limit"); | |
| 466 } | |
| 467 ::close(file_descriptor()); | |
| 468 set_file_descriptor(-1); | |
| 469 } | |
| 470 } | |
| 471 } | |
| 472 | |
| 473 // write raw bytes | |
| 474 void DumpWriter::write_raw(void* s, int len) { | |
| 475 if (is_open()) { | |
| 476 // flush buffer to make toom | |
| 477 if ((position()+ len) >= buffer_size()) { | |
| 478 flush(); | |
| 479 } | |
| 480 | |
| 481 // buffer not available or too big to buffer it | |
| 482 if ((buffer() == NULL) || (len >= buffer_size())) { | |
| 483 write_internal(s, len); | |
| 484 } else { | |
| 485 // Should optimize this for u1/u2/u4/u8 sizes. | |
| 486 memcpy(buffer() + position(), s, len); | |
| 487 set_position(position() + len); | |
| 488 } | |
| 489 } | |
| 490 } | |
| 491 | |
| 492 // flush any buffered bytes to the file | |
| 493 void DumpWriter::flush() { | |
| 494 if (is_open() && position() > 0) { | |
| 495 write_internal(buffer(), position()); | |
| 496 set_position(0); | |
| 497 } | |
| 498 } | |
| 499 | |
| 500 | |
| 501 jlong DumpWriter::current_offset() { | |
| 502 if (is_open()) { | |
| 503 // the offset is the file offset plus whatever we have buffered | |
| 504 jlong offset = os::current_file_offset(file_descriptor()); | |
| 505 assert(offset >= 0, "lseek failed"); | |
| 506 return offset + (jlong)position(); | |
| 507 } else { | |
| 508 return (jlong)-1; | |
| 509 } | |
| 510 } | |
| 511 | |
| 512 void DumpWriter::seek_to_offset(jlong off) { | |
| 513 assert(off >= 0, "bad offset"); | |
| 514 | |
| 515 // need to flush before seeking | |
| 516 flush(); | |
| 517 | |
| 518 // may be closed due to I/O error | |
| 519 if (is_open()) { | |
| 520 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
| 521 assert(n >= 0, "lseek failed"); | |
| 522 } | |
| 523 } | |
| 524 | |
| 525 void DumpWriter::write_u2(u2 x) { | |
| 526 u2 v; | |
| 527 Bytes::put_Java_u2((address)&v, x); | |
| 528 write_raw((void*)&v, 2); | |
| 529 } | |
| 530 | |
| 531 void DumpWriter::write_u4(u4 x) { | |
| 532 u4 v; | |
| 533 Bytes::put_Java_u4((address)&v, x); | |
| 534 write_raw((void*)&v, 4); | |
| 535 } | |
| 536 | |
| 537 void DumpWriter::write_u8(u8 x) { | |
| 538 u8 v; | |
| 539 Bytes::put_Java_u8((address)&v, x); | |
| 540 write_raw((void*)&v, 8); | |
| 541 } | |
| 542 | |
| 543 void DumpWriter::write_objectID(oop o) { | |
| 544 address a = (address)((uintptr_t)o); | |
| 545 #ifdef _LP64 | |
| 546 write_u8((u8)a); | |
| 547 #else | |
| 548 write_u4((u4)a); | |
| 549 #endif | |
| 550 } | |
| 551 | |
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552 void DumpWriter::write_id(u4 x) { |
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553 #ifdef _LP64 |
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554 write_u8((u8) x); |
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555 #else |
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556 write_u4(x); |
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557 #endif |
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558 } |
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559 |
| 0 | 560 // We use java mirror as the class ID |
| 561 void DumpWriter::write_classID(Klass* k) { | |
| 562 write_objectID(k->java_mirror()); | |
| 563 } | |
| 564 | |
| 565 | |
| 566 | |
| 567 // Support class with a collection of functions used when dumping the heap | |
| 568 | |
| 569 class DumperSupport : AllStatic { | |
| 570 public: | |
| 571 | |
| 572 // write a header of the given type | |
| 573 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
| 574 | |
| 575 // returns hprof tag for the given type signature | |
| 576 static hprofTag sig2tag(symbolOop sig); | |
| 577 // returns hprof tag for the given basic type | |
| 578 static hprofTag type2tag(BasicType type); | |
| 579 | |
| 580 // returns the size of the instance of the given class | |
| 581 static u4 instance_size(klassOop k); | |
| 582 | |
| 583 // dump a jfloat | |
| 584 static void dump_float(DumpWriter* writer, jfloat f); | |
| 585 // dump a jdouble | |
| 586 static void dump_double(DumpWriter* writer, jdouble d); | |
| 587 // dumps the raw value of the given field | |
| 588 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
| 589 // dumps static fields of the given class | |
| 590 static void dump_static_fields(DumpWriter* writer, klassOop k); | |
| 591 // dump the raw values of the instance fields of the given object | |
| 592 static void dump_instance_fields(DumpWriter* writer, oop o); | |
| 593 // dumps the definition of the instance fields for a given class | |
| 594 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); | |
| 595 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 596 static void dump_instance(DumpWriter* writer, oop o); | |
| 597 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
| 598 // array classes | |
| 599 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); | |
| 600 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 601 // class (and each multi-dimensional array class too) | |
| 602 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); | |
| 603 | |
| 604 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 605 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
| 606 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 607 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
|
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608 // create HPROF_FRAME record for the given method and bci |
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609 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, methodOop m, int bci); |
| 0 | 610 }; |
| 611 | |
| 612 // write a header of the given type | |
| 613 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
| 614 writer->write_u1((u1)tag); | |
| 615 writer->write_u4(0); // current ticks | |
| 616 writer->write_u4(len); | |
| 617 } | |
| 618 | |
| 619 // returns hprof tag for the given type signature | |
| 620 hprofTag DumperSupport::sig2tag(symbolOop sig) { | |
| 621 switch (sig->byte_at(0)) { | |
| 622 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
| 623 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
| 624 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
| 625 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
| 626 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
| 627 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
| 628 case JVM_SIGNATURE_INT : return HPROF_INT; | |
| 629 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
| 630 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
| 631 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
| 632 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 633 } | |
| 634 } | |
| 635 | |
| 636 hprofTag DumperSupport::type2tag(BasicType type) { | |
| 637 switch (type) { | |
| 638 case T_BYTE : return HPROF_BYTE; | |
| 639 case T_CHAR : return HPROF_CHAR; | |
| 640 case T_FLOAT : return HPROF_FLOAT; | |
| 641 case T_DOUBLE : return HPROF_DOUBLE; | |
| 642 case T_INT : return HPROF_INT; | |
| 643 case T_LONG : return HPROF_LONG; | |
| 644 case T_SHORT : return HPROF_SHORT; | |
| 645 case T_BOOLEAN : return HPROF_BOOLEAN; | |
| 646 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 647 } | |
| 648 } | |
| 649 | |
| 650 // dump a jfloat | |
| 651 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
| 652 if (g_isnan(f)) { | |
| 653 writer->write_u4(0x7fc00000); // collapsing NaNs | |
| 654 } else { | |
| 655 union { | |
| 656 int i; | |
| 657 float f; | |
| 658 } u; | |
| 659 u.f = (float)f; | |
| 660 writer->write_u4((u4)u.i); | |
| 661 } | |
| 662 } | |
| 663 | |
| 664 // dump a jdouble | |
| 665 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
| 666 union { | |
| 667 jlong l; | |
| 668 double d; | |
| 669 } u; | |
| 670 if (g_isnan(d)) { // collapsing NaNs | |
| 671 u.l = (jlong)(0x7ff80000); | |
| 672 u.l = (u.l << 32); | |
| 673 } else { | |
| 674 u.d = (double)d; | |
| 675 } | |
| 676 writer->write_u8((u8)u.l); | |
| 677 } | |
| 678 | |
| 679 // dumps the raw value of the given field | |
| 680 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
| 681 switch (type) { | |
| 682 case JVM_SIGNATURE_CLASS : | |
| 683 case JVM_SIGNATURE_ARRAY : { | |
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684 oop o; |
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685 if (UseCompressedOops) { |
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686 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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687 } else { |
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688 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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689 } |
| 0 | 690 |
| 691 // reflection and sun.misc.Unsafe classes may have a reference to a | |
| 692 // klassOop so filter it out. | |
| 693 if (o != NULL && o->is_klass()) { | |
| 694 o = NULL; | |
| 695 } | |
| 696 | |
| 697 // FIXME: When sharing is enabled we don't emit field references to objects | |
| 698 // in shared spaces. We can remove this once we write records for the classes | |
| 699 // and strings that are shared. | |
| 700 if (o != NULL && o->is_shared()) { | |
| 701 o = NULL; | |
| 702 } | |
| 703 writer->write_objectID(o); | |
| 704 break; | |
| 705 } | |
| 706 case JVM_SIGNATURE_BYTE : { | |
| 707 jbyte* b = (jbyte*)addr; | |
| 708 writer->write_u1((u1)*b); | |
| 709 break; | |
| 710 } | |
| 711 case JVM_SIGNATURE_CHAR : { | |
| 712 jchar* c = (jchar*)addr; | |
| 713 writer->write_u2((u2)*c); | |
| 714 break; | |
| 715 } | |
| 716 case JVM_SIGNATURE_SHORT : { | |
| 717 jshort* s = (jshort*)addr; | |
| 718 writer->write_u2((u2)*s); | |
| 719 break; | |
| 720 } | |
| 721 case JVM_SIGNATURE_FLOAT : { | |
| 722 jfloat* f = (jfloat*)addr; | |
| 723 dump_float(writer, *f); | |
| 724 break; | |
| 725 } | |
| 726 case JVM_SIGNATURE_DOUBLE : { | |
| 727 jdouble* f = (jdouble*)addr; | |
| 728 dump_double(writer, *f); | |
| 729 break; | |
| 730 } | |
| 731 case JVM_SIGNATURE_INT : { | |
| 732 jint* i = (jint*)addr; | |
| 733 writer->write_u4((u4)*i); | |
| 734 break; | |
| 735 } | |
| 736 case JVM_SIGNATURE_LONG : { | |
| 737 jlong* l = (jlong*)addr; | |
| 738 writer->write_u8((u8)*l); | |
| 739 break; | |
| 740 } | |
| 741 case JVM_SIGNATURE_BOOLEAN : { | |
| 742 jboolean* b = (jboolean*)addr; | |
| 743 writer->write_u1((u1)*b); | |
| 744 break; | |
| 745 } | |
| 746 default : ShouldNotReachHere(); | |
| 747 } | |
| 748 } | |
| 749 | |
| 750 // returns the size of the instance of the given class | |
| 751 u4 DumperSupport::instance_size(klassOop k) { | |
| 752 HandleMark hm; | |
| 753 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 754 | |
| 755 int size = 0; | |
| 756 | |
| 757 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 758 if (!fld.access_flags().is_static()) { | |
| 759 symbolOop sig = fld.signature(); | |
| 760 switch (sig->byte_at(0)) { | |
| 761 case JVM_SIGNATURE_CLASS : | |
| 762 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
| 763 | |
| 764 case JVM_SIGNATURE_BYTE : | |
| 765 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
| 766 | |
| 767 case JVM_SIGNATURE_CHAR : | |
| 768 case JVM_SIGNATURE_SHORT : size += 2; break; | |
| 769 | |
| 770 case JVM_SIGNATURE_INT : | |
| 771 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
| 772 | |
| 773 case JVM_SIGNATURE_LONG : | |
| 774 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
| 775 | |
| 776 default : ShouldNotReachHere(); | |
| 777 } | |
| 778 } | |
| 779 } | |
| 780 return (u4)size; | |
| 781 } | |
| 782 | |
| 783 // dumps static fields of the given class | |
| 784 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { | |
| 785 HandleMark hm; | |
| 786 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 787 | |
| 788 // pass 1 - count the static fields | |
| 789 u2 field_count = 0; | |
| 790 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 791 if (fldc.access_flags().is_static()) field_count++; | |
| 792 } | |
| 793 | |
| 794 writer->write_u2(field_count); | |
| 795 | |
| 796 // pass 2 - dump the field descriptors and raw values | |
| 797 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 798 if (fld.access_flags().is_static()) { | |
| 799 symbolOop sig = fld.signature(); | |
| 800 | |
| 801 writer->write_objectID(fld.name()); // name | |
| 802 writer->write_u1(sig2tag(sig)); // type | |
| 803 | |
| 804 // value | |
| 805 int offset = fld.offset(); | |
| 806 address addr = (address)k + offset; | |
| 807 | |
| 808 dump_field_value(writer, sig->byte_at(0), addr); | |
| 809 } | |
| 810 } | |
| 811 } | |
| 812 | |
| 813 // dump the raw values of the instance fields of the given object | |
| 814 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
| 815 HandleMark hm; | |
| 816 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
| 817 | |
| 818 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 819 if (!fld.access_flags().is_static()) { | |
| 820 symbolOop sig = fld.signature(); | |
| 821 address addr = (address)o + fld.offset(); | |
| 822 | |
| 823 dump_field_value(writer, sig->byte_at(0), addr); | |
| 824 } | |
| 825 } | |
| 826 } | |
| 827 | |
| 828 // dumps the definition of the instance fields for a given class | |
| 829 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { | |
| 830 HandleMark hm; | |
| 831 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 832 | |
| 833 // pass 1 - count the instance fields | |
| 834 u2 field_count = 0; | |
| 835 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 836 if (!fldc.access_flags().is_static()) field_count++; | |
| 837 } | |
| 838 | |
| 839 writer->write_u2(field_count); | |
| 840 | |
| 841 // pass 2 - dump the field descriptors | |
| 842 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 843 if (!fld.access_flags().is_static()) { | |
| 844 symbolOop sig = fld.signature(); | |
| 845 | |
| 846 writer->write_objectID(fld.name()); // name | |
| 847 writer->write_u1(sig2tag(sig)); // type | |
| 848 } | |
| 849 } | |
| 850 } | |
| 851 | |
| 852 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 853 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
| 854 klassOop k = o->klass(); | |
| 855 | |
| 856 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
| 857 writer->write_objectID(o); | |
| 858 writer->write_u4(STACK_TRACE_ID); | |
| 859 | |
| 860 // class ID | |
| 861 writer->write_classID(Klass::cast(k)); | |
| 862 | |
| 863 // number of bytes that follow | |
| 864 writer->write_u4(instance_size(k) ); | |
| 865 | |
| 866 // field values | |
| 867 dump_instance_fields(writer, o); | |
| 868 } | |
| 869 | |
| 870 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
| 871 // its array classes | |
| 872 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { | |
| 873 Klass* klass = Klass::cast(k); | |
| 874 assert(klass->oop_is_instance(), "not an instanceKlass"); | |
| 875 instanceKlass* ik = (instanceKlass*)klass; | |
| 876 | |
| 877 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 878 | |
| 879 // class ID | |
| 880 writer->write_classID(ik); | |
| 881 writer->write_u4(STACK_TRACE_ID); | |
| 882 | |
| 883 // super class ID | |
| 884 klassOop java_super = ik->java_super(); | |
| 885 if (java_super == NULL) { | |
| 886 writer->write_objectID(NULL); | |
| 887 } else { | |
| 888 writer->write_classID(Klass::cast(java_super)); | |
| 889 } | |
| 890 | |
| 891 writer->write_objectID(ik->class_loader()); | |
| 892 writer->write_objectID(ik->signers()); | |
| 893 writer->write_objectID(ik->protection_domain()); | |
| 894 | |
| 895 // reserved | |
| 896 writer->write_objectID(NULL); | |
| 897 writer->write_objectID(NULL); | |
| 898 | |
| 899 // instance size | |
| 900 writer->write_u4(DumperSupport::instance_size(k)); | |
| 901 | |
| 902 // size of constant pool - ignored by HAT 1.1 | |
| 903 writer->write_u2(0); | |
| 904 | |
| 905 // number of static fields | |
| 906 dump_static_fields(writer, k); | |
| 907 | |
| 908 // description of instance fields | |
| 909 dump_instance_field_descriptors(writer, k); | |
| 910 | |
| 911 // array classes | |
| 912 k = klass->array_klass_or_null(); | |
| 913 while (k != NULL) { | |
| 914 Klass* klass = Klass::cast(k); | |
| 915 assert(klass->oop_is_objArray(), "not an objArrayKlass"); | |
| 916 | |
| 917 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 918 writer->write_classID(klass); | |
| 919 writer->write_u4(STACK_TRACE_ID); | |
| 920 | |
| 921 // super class of array classes is java.lang.Object | |
| 922 java_super = klass->java_super(); | |
| 923 assert(java_super != NULL, "checking"); | |
| 924 writer->write_classID(Klass::cast(java_super)); | |
| 925 | |
| 926 writer->write_objectID(ik->class_loader()); | |
| 927 writer->write_objectID(ik->signers()); | |
| 928 writer->write_objectID(ik->protection_domain()); | |
| 929 | |
| 930 writer->write_objectID(NULL); // reserved | |
| 931 writer->write_objectID(NULL); | |
| 932 writer->write_u4(0); // instance size | |
| 933 writer->write_u2(0); // constant pool | |
| 934 writer->write_u2(0); // static fields | |
| 935 writer->write_u2(0); // instance fields | |
| 936 | |
| 937 // get the array class for the next rank | |
| 938 k = klass->array_klass_or_null(); | |
| 939 } | |
| 940 } | |
| 941 | |
| 942 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 943 // class (and each multi-dimensional array class too) | |
| 944 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { | |
| 945 // array classes | |
| 946 while (k != NULL) { | |
| 947 Klass* klass = Klass::cast(k); | |
| 948 | |
| 949 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 950 writer->write_classID(klass); | |
| 951 writer->write_u4(STACK_TRACE_ID); | |
| 952 | |
| 953 // super class of array classes is java.lang.Object | |
| 954 klassOop java_super = klass->java_super(); | |
| 955 assert(java_super != NULL, "checking"); | |
| 956 writer->write_classID(Klass::cast(java_super)); | |
| 957 | |
| 958 writer->write_objectID(NULL); // loader | |
| 959 writer->write_objectID(NULL); // signers | |
| 960 writer->write_objectID(NULL); // protection domain | |
| 961 | |
| 962 writer->write_objectID(NULL); // reserved | |
| 963 writer->write_objectID(NULL); | |
| 964 writer->write_u4(0); // instance size | |
| 965 writer->write_u2(0); // constant pool | |
| 966 writer->write_u2(0); // static fields | |
| 967 writer->write_u2(0); // instance fields | |
| 968 | |
| 969 // get the array class for the next rank | |
| 970 k = klass->array_klass_or_null(); | |
| 971 } | |
| 972 } | |
| 973 | |
| 974 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 975 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
| 976 | |
| 977 // filter this | |
| 978 if (array->klass() == Universe::systemObjArrayKlassObj()) return; | |
| 979 | |
| 980 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
| 981 writer->write_objectID(array); | |
| 982 writer->write_u4(STACK_TRACE_ID); | |
| 983 writer->write_u4((u4)array->length()); | |
| 984 | |
| 985 // array class ID | |
| 986 writer->write_classID(Klass::cast(array->klass())); | |
| 987 | |
| 988 // [id]* elements | |
| 989 for (int index=0; index<array->length(); index++) { | |
| 990 oop o = array->obj_at(index); | |
| 991 writer->write_objectID(o); | |
| 992 } | |
| 993 } | |
| 994 | |
| 995 #define WRITE_ARRAY(Array, Type, Size) \ | |
| 996 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
| 997 | |
| 998 | |
| 999 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 1000 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
| 1001 BasicType type = typeArrayKlass::cast(array->klass())->element_type(); | |
| 1002 | |
| 1003 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
| 1004 writer->write_objectID(array); | |
| 1005 writer->write_u4(STACK_TRACE_ID); | |
| 1006 writer->write_u4((u4)array->length()); | |
| 1007 writer->write_u1(type2tag(type)); | |
| 1008 | |
| 1009 // nothing to copy | |
| 1010 if (array->length() == 0) { | |
| 1011 return; | |
| 1012 } | |
| 1013 | |
| 1014 // If the byte ordering is big endian then we can copy most types directly | |
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1015 int length_in_bytes = array->length() * type2aelembytes(type); |
| 0 | 1016 assert(length_in_bytes > 0, "nothing to copy"); |
| 1017 | |
| 1018 switch (type) { | |
| 1019 case T_INT : { | |
| 1020 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1021 WRITE_ARRAY(array, int, u4); | |
| 1022 } else { | |
| 1023 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
| 1024 } | |
| 1025 break; | |
| 1026 } | |
| 1027 case T_BYTE : { | |
| 1028 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
| 1029 break; | |
| 1030 } | |
| 1031 case T_CHAR : { | |
| 1032 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1033 WRITE_ARRAY(array, char, u2); | |
| 1034 } else { | |
| 1035 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
| 1036 } | |
| 1037 break; | |
| 1038 } | |
| 1039 case T_SHORT : { | |
| 1040 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1041 WRITE_ARRAY(array, short, u2); | |
| 1042 } else { | |
| 1043 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
| 1044 } | |
| 1045 break; | |
| 1046 } | |
| 1047 case T_BOOLEAN : { | |
| 1048 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1049 WRITE_ARRAY(array, bool, u1); | |
| 1050 } else { | |
| 1051 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
| 1052 } | |
| 1053 break; | |
| 1054 } | |
| 1055 case T_LONG : { | |
| 1056 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1057 WRITE_ARRAY(array, long, u8); | |
| 1058 } else { | |
| 1059 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
| 1060 } | |
| 1061 break; | |
| 1062 } | |
| 1063 | |
| 1064 // handle float/doubles in a special value to ensure than NaNs are | |
| 1065 // written correctly. TO DO: Check if we can avoid this on processors that | |
| 1066 // use IEEE 754. | |
| 1067 | |
| 1068 case T_FLOAT : { | |
| 1069 for (int i=0; i<array->length(); i++) { | |
| 1070 dump_float( writer, array->float_at(i) ); | |
| 1071 } | |
| 1072 break; | |
| 1073 } | |
| 1074 case T_DOUBLE : { | |
| 1075 for (int i=0; i<array->length(); i++) { | |
| 1076 dump_double( writer, array->double_at(i) ); | |
| 1077 } | |
| 1078 break; | |
| 1079 } | |
| 1080 default : ShouldNotReachHere(); | |
| 1081 } | |
| 1082 } | |
| 1083 | |
|
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1084 // create a HPROF_FRAME record of the given methodOop and bci |
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1085 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1086 int frame_serial_num, |
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1087 int class_serial_num, |
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1088 methodOop m, |
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1089 int bci) { |
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1090 int line_number; |
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1091 if (m->is_native()) { |
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1092 line_number = -3; // native frame |
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1093 } else { |
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1094 line_number = m->line_number_from_bci(bci); |
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1095 } |
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1096 |
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1097 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1098 writer->write_id(frame_serial_num); // frame serial number |
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1099 writer->write_objectID(m->name()); // method's name |
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1100 writer->write_objectID(m->signature()); // method's signature |
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1101 |
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1102 assert(Klass::cast(m->method_holder())->oop_is_instance(), "not instanceKlass"); |
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1103 writer->write_objectID(instanceKlass::cast(m->method_holder())->source_file_name()); // source file name |
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1104 writer->write_u4(class_serial_num); // class serial number |
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1105 writer->write_u4((u4) line_number); // line number |
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1106 } |
| 0 | 1107 |
| 1108 // Support class used to generate HPROF_UTF8 records from the entries in the | |
| 1109 // SymbolTable. | |
| 1110 | |
| 1111 class SymbolTableDumper : public OopClosure { | |
| 1112 private: | |
| 1113 DumpWriter* _writer; | |
| 1114 DumpWriter* writer() const { return _writer; } | |
| 1115 public: | |
| 1116 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
| 1117 void do_oop(oop* obj_p); | |
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1118 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1119 }; |
| 1120 | |
| 1121 void SymbolTableDumper::do_oop(oop* obj_p) { | |
| 1122 ResourceMark rm; | |
| 1123 symbolOop sym = (symbolOop)*obj_p; | |
| 1124 | |
| 1125 int len = sym->utf8_length(); | |
| 1126 if (len > 0) { | |
| 1127 char* s = sym->as_utf8(); | |
| 1128 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
| 1129 writer()->write_objectID(sym); | |
| 1130 writer()->write_raw(s, len); | |
| 1131 } | |
| 1132 } | |
| 1133 | |
| 1134 | |
| 1135 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
| 1136 | |
| 1137 class JNILocalsDumper : public OopClosure { | |
| 1138 private: | |
| 1139 DumpWriter* _writer; | |
| 1140 u4 _thread_serial_num; | |
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1141 int _frame_num; |
| 0 | 1142 DumpWriter* writer() const { return _writer; } |
| 1143 public: | |
| 1144 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
| 1145 _writer = writer; | |
| 1146 _thread_serial_num = thread_serial_num; | |
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1147 _frame_num = -1; // default - empty stack |
| 0 | 1148 } |
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1149 void set_frame_number(int n) { _frame_num = n; } |
| 0 | 1150 void do_oop(oop* obj_p); |
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1151 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1152 }; |
| 1153 | |
| 1154 | |
| 1155 void JNILocalsDumper::do_oop(oop* obj_p) { | |
| 1156 // ignore null or deleted handles | |
| 1157 oop o = *obj_p; | |
| 1158 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
| 1159 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
| 1160 writer()->write_objectID(o); | |
| 1161 writer()->write_u4(_thread_serial_num); | |
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1162 writer()->write_u4((u4)_frame_num); |
| 0 | 1163 } |
| 1164 } | |
| 1165 | |
| 1166 | |
| 1167 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
| 1168 | |
| 1169 class JNIGlobalsDumper : public OopClosure { | |
| 1170 private: | |
| 1171 DumpWriter* _writer; | |
| 1172 DumpWriter* writer() const { return _writer; } | |
| 1173 | |
| 1174 public: | |
| 1175 JNIGlobalsDumper(DumpWriter* writer) { | |
| 1176 _writer = writer; | |
| 1177 } | |
| 1178 void do_oop(oop* obj_p); | |
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1179 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1180 }; |
| 1181 | |
| 1182 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
| 1183 oop o = *obj_p; | |
| 1184 | |
| 1185 // ignore these | |
| 1186 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
| 1187 | |
| 1188 // we ignore global ref to symbols and other internal objects | |
| 1189 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
| 1190 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
| 1191 writer()->write_objectID(o); | |
| 1192 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
| 1193 } | |
| 1194 }; | |
| 1195 | |
| 1196 | |
| 1197 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
| 1198 | |
| 1199 class MonitorUsedDumper : public OopClosure { | |
| 1200 private: | |
| 1201 DumpWriter* _writer; | |
| 1202 DumpWriter* writer() const { return _writer; } | |
| 1203 public: | |
| 1204 MonitorUsedDumper(DumpWriter* writer) { | |
| 1205 _writer = writer; | |
| 1206 } | |
| 1207 void do_oop(oop* obj_p) { | |
| 1208 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
| 1209 writer()->write_objectID(*obj_p); | |
| 1210 } | |
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1211 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1212 }; |
| 1213 | |
| 1214 | |
| 1215 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
| 1216 | |
| 1217 class StickyClassDumper : public OopClosure { | |
| 1218 private: | |
| 1219 DumpWriter* _writer; | |
| 1220 DumpWriter* writer() const { return _writer; } | |
| 1221 public: | |
| 1222 StickyClassDumper(DumpWriter* writer) { | |
| 1223 _writer = writer; | |
| 1224 } | |
| 1225 void do_oop(oop* obj_p); | |
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1226 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1227 }; |
| 1228 | |
| 1229 void StickyClassDumper::do_oop(oop* obj_p) { | |
| 1230 if (*obj_p != NULL) { | |
| 1231 oop o = *obj_p; | |
| 1232 if (o->is_klass()) { | |
| 1233 klassOop k = klassOop(o); | |
| 1234 if (Klass::cast(k)->oop_is_instance()) { | |
| 1235 instanceKlass* ik = instanceKlass::cast(k); | |
| 1236 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); | |
| 1237 writer()->write_classID(ik); | |
| 1238 } | |
| 1239 } | |
| 1240 } | |
| 1241 } | |
| 1242 | |
| 1243 | |
| 1244 class VM_HeapDumper; | |
| 1245 | |
| 1246 // Support class using when iterating over the heap. | |
| 1247 | |
| 1248 class HeapObjectDumper : public ObjectClosure { | |
| 1249 private: | |
| 1250 VM_HeapDumper* _dumper; | |
| 1251 DumpWriter* _writer; | |
| 1252 | |
| 1253 VM_HeapDumper* dumper() { return _dumper; } | |
| 1254 DumpWriter* writer() { return _writer; } | |
| 1255 | |
| 1256 // used to indicate that a record has been writen | |
| 1257 void mark_end_of_record(); | |
| 1258 | |
| 1259 public: | |
| 1260 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
| 1261 _dumper = dumper; | |
| 1262 _writer = writer; | |
| 1263 } | |
| 1264 | |
| 1265 // called for each object in the heap | |
| 1266 void do_object(oop o); | |
| 1267 }; | |
| 1268 | |
| 1269 void HeapObjectDumper::do_object(oop o) { | |
| 1270 // hide the sentinel for deleted handles | |
| 1271 if (o == JNIHandles::deleted_handle()) return; | |
| 1272 | |
| 1273 // ignore KlassKlass objects | |
| 1274 if (o->is_klass()) return; | |
| 1275 | |
| 1276 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
| 1277 if (o->klass() == SystemDictionary::class_klass()) { | |
| 1278 if (!java_lang_Class::is_primitive(o)) { | |
| 1279 return; | |
| 1280 } | |
| 1281 } | |
| 1282 | |
| 1283 // create a HPROF_GC_INSTANCE record for each object | |
| 1284 if (o->is_instance()) { | |
| 1285 DumperSupport::dump_instance(writer(), o); | |
| 1286 mark_end_of_record(); | |
| 1287 } else { | |
| 1288 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
| 1289 if (o->is_objArray()) { | |
| 1290 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
| 1291 mark_end_of_record(); | |
| 1292 } else { | |
| 1293 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
| 1294 if (o->is_typeArray()) { | |
| 1295 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
| 1296 mark_end_of_record(); | |
| 1297 } | |
| 1298 } | |
| 1299 } | |
| 1300 } | |
| 1301 | |
| 1302 // The VM operation that performs the heap dump | |
| 1303 class VM_HeapDumper : public VM_GC_Operation { | |
| 1304 private: | |
|
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1305 static VM_HeapDumper* _global_dumper; |
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1306 static DumpWriter* _global_writer; |
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1307 DumpWriter* _local_writer; |
| 0 | 1308 bool _gc_before_heap_dump; |
| 1309 bool _is_segmented_dump; | |
| 1310 jlong _dump_start; | |
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1311 GrowableArray<Klass*>* _klass_map; |
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1312 ThreadStackTrace** _stack_traces; |
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1313 int _num_threads; |
| 0 | 1314 |
|
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1315 // accessors and setters |
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1316 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1317 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1318 void set_global_dumper() { |
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1319 assert(_global_dumper == NULL, "Error"); |
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1320 _global_dumper = this; |
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1321 } |
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1322 void set_global_writer() { |
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1323 assert(_global_writer == NULL, "Error"); |
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1324 _global_writer = _local_writer; |
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1325 } |
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1326 void clear_global_dumper() { _global_dumper = NULL; } |
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1327 void clear_global_writer() { _global_writer = NULL; } |
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1328 |
| 0 | 1329 bool is_segmented_dump() const { return _is_segmented_dump; } |
| 1330 void set_segmented_dump() { _is_segmented_dump = true; } | |
| 1331 jlong dump_start() const { return _dump_start; } | |
| 1332 void set_dump_start(jlong pos); | |
| 1333 | |
| 1334 bool skip_operation() const; | |
| 1335 | |
| 1336 // writes a HPROF_LOAD_CLASS record | |
| 1337 static void do_load_class(klassOop k); | |
| 1338 | |
| 1339 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1340 // (and each array class too) | |
| 1341 static void do_class_dump(klassOop k); | |
| 1342 | |
| 1343 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1344 // array (and each multi-dimensional array too) | |
| 1345 static void do_basic_type_array_class_dump(klassOop k); | |
| 1346 | |
| 1347 // HPROF_GC_ROOT_THREAD_OBJ records | |
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1348 int do_thread(JavaThread* thread, u4 thread_serial_num); |
| 0 | 1349 void do_threads(); |
| 1350 | |
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1351 void add_class_serial_number(Klass* k, int serial_num) { |
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1352 _klass_map->at_put_grow(serial_num, k); |
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1353 } |
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1354 |
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1355 // HPROF_TRACE and HPROF_FRAME records |
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1356 void dump_stack_traces(); |
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1357 |
| 0 | 1358 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
| 1359 void write_dump_header(); | |
| 1360 | |
| 1361 // fixes up the length of the current dump record | |
| 1362 void write_current_dump_record_length(); | |
| 1363 | |
| 1364 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1365 // record in the case of a segmented heap dump) | |
| 1366 void end_of_dump(); | |
| 1367 | |
| 1368 public: | |
| 1369 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump) : | |
| 1370 VM_GC_Operation(0 /* total collections, dummy, ignored */, | |
| 1371 0 /* total full collections, dummy, ignored */, | |
| 1372 gc_before_heap_dump) { | |
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1373 _local_writer = writer; |
| 0 | 1374 _gc_before_heap_dump = gc_before_heap_dump; |
| 1375 _is_segmented_dump = false; | |
| 1376 _dump_start = (jlong)-1; | |
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1377 _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1378 _stack_traces = NULL; |
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1379 _num_threads = 0; |
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1380 } |
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1381 ~VM_HeapDumper() { |
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1382 if (_stack_traces != NULL) { |
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1383 for (int i=0; i < _num_threads; i++) { |
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1384 delete _stack_traces[i]; |
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1385 } |
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1386 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces); |
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1387 } |
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1388 delete _klass_map; |
| 0 | 1389 } |
| 1390 | |
| 1391 VMOp_Type type() const { return VMOp_HeapDumper; } | |
| 1392 // used to mark sub-record boundary | |
| 1393 void check_segment_length(); | |
| 1394 void doit(); | |
| 1395 }; | |
| 1396 | |
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1397 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1398 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1399 |
| 0 | 1400 bool VM_HeapDumper::skip_operation() const { |
| 1401 return false; | |
| 1402 } | |
| 1403 | |
| 1404 // sets the dump starting position | |
| 1405 void VM_HeapDumper::set_dump_start(jlong pos) { | |
| 1406 _dump_start = pos; | |
| 1407 } | |
| 1408 | |
| 1409 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
| 1410 void VM_HeapDumper::write_dump_header() { | |
| 1411 if (writer()->is_open()) { | |
| 1412 if (is_segmented_dump()) { | |
| 1413 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
| 1414 } else { | |
| 1415 writer()->write_u1(HPROF_HEAP_DUMP); | |
| 1416 } | |
| 1417 writer()->write_u4(0); // current ticks | |
| 1418 | |
| 1419 // record the starting position for the dump (its length will be fixed up later) | |
| 1420 set_dump_start(writer()->current_offset()); | |
| 1421 writer()->write_u4(0); | |
| 1422 } | |
| 1423 } | |
| 1424 | |
| 1425 // fixes up the length of the current dump record | |
| 1426 void VM_HeapDumper::write_current_dump_record_length() { | |
| 1427 if (writer()->is_open()) { | |
| 1428 assert(dump_start() >= 0, "no dump start recorded"); | |
| 1429 | |
| 1430 // calculate the size of the dump record | |
| 1431 jlong dump_end = writer()->current_offset(); | |
| 1432 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1433 | |
| 1434 // record length must fit in a u4 | |
| 1435 if (dump_len > (jlong)(4L*(jlong)G)) { | |
| 1436 warning("record is too large"); | |
| 1437 } | |
| 1438 | |
| 1439 // seek to the dump start and fix-up the length | |
| 1440 writer()->seek_to_offset(dump_start()); | |
| 1441 writer()->write_u4((u4)dump_len); | |
| 1442 | |
| 1443 // adjust the total size written to keep the bytes written correct. | |
| 1444 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
| 1445 | |
| 1446 // seek to dump end so we can continue | |
| 1447 writer()->seek_to_offset(dump_end); | |
| 1448 | |
| 1449 // no current dump record | |
| 1450 set_dump_start((jlong)-1); | |
| 1451 } | |
| 1452 } | |
| 1453 | |
| 1454 // used on a sub-record boundary to check if we need to start a | |
| 1455 // new segment. | |
| 1456 void VM_HeapDumper::check_segment_length() { | |
| 1457 if (writer()->is_open()) { | |
| 1458 if (is_segmented_dump()) { | |
| 1459 // don't use current_offset that would be too expensive on a per record basis | |
| 1460 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
| 1461 assert(dump_end == writer()->current_offset(), "checking"); | |
| 1462 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1463 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
| 1464 | |
| 1465 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
| 1466 write_current_dump_record_length(); | |
| 1467 write_dump_header(); | |
| 1468 } | |
| 1469 } | |
| 1470 } | |
| 1471 } | |
| 1472 | |
| 1473 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1474 // record in the case of a segmented heap dump) | |
| 1475 void VM_HeapDumper::end_of_dump() { | |
| 1476 if (writer()->is_open()) { | |
| 1477 write_current_dump_record_length(); | |
| 1478 | |
| 1479 // for segmented dump we write the end record | |
| 1480 if (is_segmented_dump()) { | |
| 1481 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
| 1482 writer()->write_u4(0); | |
| 1483 writer()->write_u4(0); | |
| 1484 } | |
| 1485 } | |
| 1486 } | |
| 1487 | |
| 1488 // marks sub-record boundary | |
| 1489 void HeapObjectDumper::mark_end_of_record() { | |
| 1490 dumper()->check_segment_length(); | |
| 1491 } | |
| 1492 | |
| 1493 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
| 1494 // array classes) | |
| 1495 void VM_HeapDumper::do_load_class(klassOop k) { | |
| 1496 static u4 class_serial_num = 0; | |
| 1497 | |
| 1498 // len of HPROF_LOAD_CLASS record | |
| 1499 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
| 1500 | |
| 1501 // write a HPROF_LOAD_CLASS for the class and each array class | |
| 1502 do { | |
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1503 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
| 0 | 1504 |
| 1505 // class serial number is just a number | |
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1506 writer()->write_u4(++class_serial_num); |
| 0 | 1507 |
| 1508 // class ID | |
| 1509 Klass* klass = Klass::cast(k); | |
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1510 writer()->write_classID(klass); |
| 0 | 1511 |
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1512 // add the klassOop and class serial number pair |
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1513 dumper()->add_class_serial_number(klass, class_serial_num); |
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1514 |
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1515 writer()->write_u4(STACK_TRACE_ID); |
| 0 | 1516 |
| 1517 // class name ID | |
| 1518 symbolOop name = klass->name(); | |
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1519 writer()->write_objectID(name); |
| 0 | 1520 |
| 1521 // write a LOAD_CLASS record for the array type (if it exists) | |
| 1522 k = klass->array_klass_or_null(); | |
| 1523 } while (k != NULL); | |
| 1524 } | |
| 1525 | |
| 1526 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1527 void VM_HeapDumper::do_class_dump(klassOop k) { | |
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1528 DumperSupport::dump_class_and_array_classes(writer(), k); |
| 0 | 1529 } |
| 1530 | |
| 1531 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1532 // array (and each multi-dimensional array too) | |
| 1533 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { | |
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1534 DumperSupport::dump_basic_type_array_class(writer(), k); |
| 0 | 1535 } |
| 1536 | |
| 1537 // Walk the stack of the given thread. | |
| 1538 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
| 1539 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
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1540 // |
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1541 // It returns the number of Java frames in this thread stack |
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1542 int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
| 0 | 1543 JNILocalsDumper blk(writer(), thread_serial_num); |
| 1544 | |
| 1545 oop threadObj = java_thread->threadObj(); | |
| 1546 assert(threadObj != NULL, "sanity check"); | |
| 1547 | |
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1548 int stack_depth = 0; |
| 0 | 1549 if (java_thread->has_last_Java_frame()) { |
| 1550 | |
| 1551 // vframes are resource allocated | |
| 1552 Thread* current_thread = Thread::current(); | |
| 1553 ResourceMark rm(current_thread); | |
| 1554 HandleMark hm(current_thread); | |
| 1555 | |
| 1556 RegisterMap reg_map(java_thread); | |
| 1557 frame f = java_thread->last_frame(); | |
| 1558 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
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1559 frame* last_entry_frame = NULL; |
| 0 | 1560 |
| 1561 while (vf != NULL) { | |
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1562 blk.set_frame_number(stack_depth); |
| 0 | 1563 if (vf->is_java_frame()) { |
| 1564 | |
| 1565 // java frame (interpreted, compiled, ...) | |
| 1566 javaVFrame *jvf = javaVFrame::cast(vf); | |
| 1567 if (!(jvf->method()->is_native())) { | |
| 1568 StackValueCollection* locals = jvf->locals(); | |
| 1569 for (int slot=0; slot<locals->size(); slot++) { | |
| 1570 if (locals->at(slot)->type() == T_OBJECT) { | |
| 1571 oop o = locals->obj_at(slot)(); | |
| 1572 | |
| 1573 if (o != NULL) { | |
| 1574 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
| 1575 writer()->write_objectID(o); | |
| 1576 writer()->write_u4(thread_serial_num); | |
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1577 writer()->write_u4((u4) stack_depth); |
| 0 | 1578 } |
| 1579 } | |
| 1580 } | |
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1581 } else { |
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1582 // native frame |
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1583 if (stack_depth == 0) { |
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1584 // JNI locals for the top frame. |
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1585 java_thread->active_handles()->oops_do(&blk); |
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1586 } else { |
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1587 if (last_entry_frame != NULL) { |
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1588 // JNI locals for the entry frame |
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1589 assert(last_entry_frame->is_entry_frame(), "checking"); |
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1590 last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
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1591 } |
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1592 } |
| 0 | 1593 } |
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1594 // increment only for Java frames |
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1595 stack_depth++; |
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1596 last_entry_frame = NULL; |
| 0 | 1597 |
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1598 } else { |
| 0 | 1599 // externalVFrame - if it's an entry frame then report any JNI locals |
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1600 // as roots when we find the corresponding native javaVFrame |
| 0 | 1601 frame* fr = vf->frame_pointer(); |
| 1602 assert(fr != NULL, "sanity check"); | |
| 1603 if (fr->is_entry_frame()) { | |
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1604 last_entry_frame = fr; |
| 0 | 1605 } |
| 1606 } | |
| 1607 vf = vf->sender(); | |
| 1608 } | |
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1609 } else { |
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1610 // no last java frame but there may be JNI locals |
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1611 java_thread->active_handles()->oops_do(&blk); |
| 0 | 1612 } |
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1613 return stack_depth; |
| 0 | 1614 } |
| 1615 | |
| 1616 | |
| 1617 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
| 1618 // the stack so that locals and JNI locals are dumped. | |
| 1619 void VM_HeapDumper::do_threads() { | |
|
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1620 for (int i=0; i < _num_threads; i++) { |
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1621 JavaThread* thread = _stack_traces[i]->thread(); |
| 0 | 1622 oop threadObj = thread->threadObj(); |
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1623 u4 thread_serial_num = i+1; |
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1624 u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
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1625 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
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1626 writer()->write_objectID(threadObj); |
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1627 writer()->write_u4(thread_serial_num); // thread number |
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1628 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1629 int num_frames = do_thread(thread, thread_serial_num); |
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1630 assert(num_frames == _stack_traces[i]->get_stack_depth(), |
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1631 "total number of Java frames not matched"); |
| 0 | 1632 } |
| 1633 } | |
| 1634 | |
| 1635 | |
| 1636 // The VM operation that dumps the heap. The dump consists of the following | |
| 1637 // records: | |
| 1638 // | |
| 1639 // HPROF_HEADER | |
| 1640 // [HPROF_UTF8]* | |
| 1641 // [HPROF_LOAD_CLASS]* | |
|
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1642 // [[HPROF_FRAME]*|HPROF_TRACE]* |
| 0 | 1643 // [HPROF_GC_CLASS_DUMP]* |
| 1644 // HPROF_HEAP_DUMP | |
| 1645 // | |
|
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1646 // The HPROF_TRACE records represent the stack traces where the heap dump |
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1647 // is generated and a "dummy trace" record which does not include |
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1648 // any frames. The dummy trace record is used to be referenced as the |
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1649 // unknown object alloc site. |
| 0 | 1650 // |
| 1651 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
| 1652 // the heap dump be generated in a single pass we remember the position of | |
| 1653 // the dump length and fix it up after all sub-records have been written. | |
| 1654 // To generate the sub-records we iterate over the heap, writing | |
| 1655 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
| 1656 // records as we go. Once that is done we write records for some of the GC | |
| 1657 // roots. | |
| 1658 | |
| 1659 void VM_HeapDumper::doit() { | |
| 1660 | |
| 1661 HandleMark hm; | |
| 1662 CollectedHeap* ch = Universe::heap(); | |
| 1663 if (_gc_before_heap_dump) { | |
| 1664 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
| 1665 } else { | |
| 1666 // make the heap parsable (no need to retire TLABs) | |
| 1667 ch->ensure_parsability(false); | |
| 1668 } | |
| 1669 | |
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1670 // At this point we should be the only dumper active, so |
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1671 // the following should be safe. |
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1672 set_global_dumper(); |
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1673 set_global_writer(); |
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1674 |
| 0 | 1675 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
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1676 size_t used = ch->used(); |
| 0 | 1677 const char* header; |
| 1678 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
| 1679 set_segmented_dump(); | |
| 1680 header = "JAVA PROFILE 1.0.2"; | |
| 1681 } else { | |
| 1682 header = "JAVA PROFILE 1.0.1"; | |
| 1683 } | |
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1684 |
| 0 | 1685 // header is few bytes long - no chance to overflow int |
| 1686 writer()->write_raw((void*)header, (int)strlen(header)); | |
| 1687 writer()->write_u1(0); // terminator | |
| 1688 writer()->write_u4(oopSize); | |
| 1689 writer()->write_u8(os::javaTimeMillis()); | |
| 1690 | |
| 1691 // HPROF_UTF8 records | |
| 1692 SymbolTableDumper sym_dumper(writer()); | |
| 1693 SymbolTable::oops_do(&sym_dumper); | |
| 1694 | |
| 1695 // write HPROF_LOAD_CLASS records | |
| 1696 SystemDictionary::classes_do(&do_load_class); | |
| 1697 Universe::basic_type_classes_do(&do_load_class); | |
| 1698 | |
|
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1699 // write HPROF_FRAME and HPROF_TRACE records |
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1700 // this must be called after _klass_map is built when iterating the classes above. |
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1701 dump_stack_traces(); |
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1702 |
| 0 | 1703 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
| 1704 write_dump_header(); | |
| 1705 | |
| 1706 // Writes HPROF_GC_CLASS_DUMP records | |
| 1707 SystemDictionary::classes_do(&do_class_dump); | |
| 1708 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); | |
| 1709 check_segment_length(); | |
| 1710 | |
| 1711 // writes HPROF_GC_INSTANCE_DUMP records. | |
| 1712 // After each sub-record is written check_segment_length will be invoked. When | |
| 1713 // generated a segmented heap dump this allows us to check if the current | |
| 1714 // segment exceeds a threshold and if so, then a new segment is started. | |
| 1715 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
| 1716 // of the heap dump. | |
| 1717 HeapObjectDumper obj_dumper(this, writer()); | |
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1718 Universe::heap()->safe_object_iterate(&obj_dumper); |
| 0 | 1719 |
| 1720 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
| 1721 do_threads(); | |
| 1722 check_segment_length(); | |
| 1723 | |
| 1724 // HPROF_GC_ROOT_MONITOR_USED | |
| 1725 MonitorUsedDumper mon_dumper(writer()); | |
| 1726 ObjectSynchronizer::oops_do(&mon_dumper); | |
| 1727 check_segment_length(); | |
| 1728 | |
| 1729 // HPROF_GC_ROOT_JNI_GLOBAL | |
| 1730 JNIGlobalsDumper jni_dumper(writer()); | |
| 1731 JNIHandles::oops_do(&jni_dumper); | |
| 1732 check_segment_length(); | |
| 1733 | |
| 1734 // HPROF_GC_ROOT_STICKY_CLASS | |
| 1735 StickyClassDumper class_dumper(writer()); | |
| 1736 SystemDictionary::always_strong_oops_do(&class_dumper); | |
| 1737 | |
| 1738 // fixes up the length of the dump record. In the case of a segmented | |
| 1739 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
| 1740 end_of_dump(); | |
|
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1741 |
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1742 // Now we clear the global variables, so that a future dumper might run. |
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1743 clear_global_dumper(); |
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1744 clear_global_writer(); |
| 0 | 1745 } |
| 1746 | |
|
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1747 void VM_HeapDumper::dump_stack_traces() { |
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1748 // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
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1749 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
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1750 writer()->write_u4((u4) STACK_TRACE_ID); |
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1751 writer()->write_u4(0); // thread number |
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1752 writer()->write_u4(0); // frame count |
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1753 |
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1754 _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads()); |
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1755 int frame_serial_num = 0; |
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1756 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
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1757 oop threadObj = thread->threadObj(); |
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1758 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
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1759 // dump thread stack trace |
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1760 ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
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1761 stack_trace->dump_stack_at_safepoint(-1); |
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1762 _stack_traces[_num_threads++] = stack_trace; |
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1763 |
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1764 // write HPROF_FRAME records for this thread's stack trace |
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1765 int depth = stack_trace->get_stack_depth(); |
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1766 int thread_frame_start = frame_serial_num; |
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1767 for (int j=0; j < depth; j++) { |
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1768 StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
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1769 methodOop m = frame->method(); |
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1770 int class_serial_num = _klass_map->find(Klass::cast(m->method_holder())); |
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1771 // the class serial number starts from 1 |
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1772 assert(class_serial_num > 0, "class not found"); |
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1773 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
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1774 } |
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1775 |
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1776 // write HPROF_TRACE record for one thread |
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1777 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
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1778 int stack_serial_num = _num_threads + STACK_TRACE_ID; |
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1779 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1780 writer()->write_u4((u4) _num_threads); // thread serial number |
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1781 writer()->write_u4(depth); // frame count |
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1782 for (int j=1; j <= depth; j++) { |
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1783 writer()->write_id(thread_frame_start + j); |
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1784 } |
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1785 } |
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1786 } |
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1787 } |
| 0 | 1788 |
| 1789 // dump the heap to given path. | |
| 1790 int HeapDumper::dump(const char* path) { | |
| 1791 assert(path != NULL && strlen(path) > 0, "path missing"); | |
| 1792 | |
| 1793 // print message in interactive case | |
| 1794 if (print_to_tty()) { | |
| 1795 tty->print_cr("Dumping heap to %s ...", path); | |
| 1796 timer()->start(); | |
| 1797 } | |
| 1798 | |
| 1799 // create the dump writer. If the file can be opened then bail | |
| 1800 DumpWriter writer(path); | |
| 1801 if (!writer.is_open()) { | |
| 1802 set_error(writer.error()); | |
| 1803 if (print_to_tty()) { | |
| 1804 tty->print_cr("Unable to create %s: %s", path, | |
| 1805 (error() != NULL) ? error() : "reason unknown"); | |
| 1806 } | |
| 1807 return -1; | |
| 1808 } | |
| 1809 | |
| 1810 // generate the dump | |
| 1811 VM_HeapDumper dumper(&writer, _gc_before_heap_dump); | |
|
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1812 if (Thread::current()->is_VM_thread()) { |
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1813 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1814 dumper.doit(); |
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1815 } else { |
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1816 VMThread::execute(&dumper); |
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1817 } |
| 0 | 1818 |
| 1819 // close dump file and record any error that the writer may have encountered | |
| 1820 writer.close(); | |
| 1821 set_error(writer.error()); | |
| 1822 | |
| 1823 // print message in interactive case | |
| 1824 if (print_to_tty()) { | |
| 1825 timer()->stop(); | |
| 1826 if (error() == NULL) { | |
| 1827 char msg[256]; | |
| 1828 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
| 1829 os::jlong_format_specifier(), timer()->seconds()); | |
| 1830 tty->print_cr(msg, writer.bytes_written()); | |
| 1831 } else { | |
| 1832 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
| 1833 } | |
| 1834 } | |
| 1835 | |
| 1836 return (writer.error() == NULL) ? 0 : -1; | |
| 1837 } | |
| 1838 | |
| 1839 // stop timer (if still active), and free any error string we might be holding | |
| 1840 HeapDumper::~HeapDumper() { | |
| 1841 if (timer()->is_active()) { | |
| 1842 timer()->stop(); | |
| 1843 } | |
| 1844 set_error(NULL); | |
| 1845 } | |
| 1846 | |
| 1847 | |
| 1848 // returns the error string (resource allocated), or NULL | |
| 1849 char* HeapDumper::error_as_C_string() const { | |
| 1850 if (error() != NULL) { | |
| 1851 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
| 1852 strcpy(str, error()); | |
| 1853 return str; | |
| 1854 } else { | |
| 1855 return NULL; | |
| 1856 } | |
| 1857 } | |
| 1858 | |
| 1859 // set the error string | |
| 1860 void HeapDumper::set_error(char* error) { | |
| 1861 if (_error != NULL) { | |
| 1862 os::free(_error); | |
| 1863 } | |
| 1864 if (error == NULL) { | |
| 1865 _error = NULL; | |
| 1866 } else { | |
| 1867 _error = os::strdup(error); | |
| 1868 assert(_error != NULL, "allocation failure"); | |
| 1869 } | |
| 1870 } | |
| 1871 | |
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1872 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1873 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1874 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1875 // general use, however, this method will need modification to prevent |
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1876 // inteference when updating the static variables base_path and dump_file_seq below. |
| 0 | 1877 void HeapDumper::dump_heap() { |
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1878 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1879 static uint dump_file_seq = 0; |
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1880 char my_path[JVM_MAXPATHLEN] = {'\0'}; |
| 0 | 1881 |
| 1882 // The dump file defaults to java_pid<pid>.hprof in the current working | |
| 1883 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
| 1884 // dump file name or a directory where dump file is created. | |
|
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1885 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1886 bool use_default_filename = true; |
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1887 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1888 // HeapDumpPath=<file> not specified |
| 0 | 1889 } else { |
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1890 assert(strlen(HeapDumpPath) < sizeof(base_path), "HeapDumpPath too long"); |
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1891 strcpy(base_path, HeapDumpPath); |
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1892 // check if the path is a directory (must exist) |
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1893 DIR* dir = os::opendir(base_path); |
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1894 if (dir == NULL) { |
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1895 use_default_filename = false; |
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1896 } else { |
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1897 // HeapDumpPath specified a directory. We append a file separator |
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1898 // (if needed). |
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1899 os::closedir(dir); |
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1900 size_t fs_len = strlen(os::file_separator()); |
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1901 if (strlen(base_path) >= fs_len) { |
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1902 char* end = base_path; |
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1903 end += (strlen(base_path) - fs_len); |
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1904 if (strcmp(end, os::file_separator()) != 0) { |
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1905 assert(strlen(base_path) + strlen(os::file_separator()) < sizeof(base_path), |
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1906 "HeapDumpPath too long"); |
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1907 strcat(base_path, os::file_separator()); |
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1908 } |
| 0 | 1909 } |
| 1910 } | |
| 1911 } | |
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1912 // If HeapDumpPath wasn't a file name then we append the default name |
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1913 if (use_default_filename) { |
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1914 char fn[32]; |
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1915 sprintf(fn, "java_pid%d", os::current_process_id()); |
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1916 assert(strlen(base_path) + strlen(fn) < sizeof(base_path), "HeapDumpPath too long"); |
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1917 strcat(base_path, fn); |
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1918 } |
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1919 assert(strlen(base_path) < sizeof(my_path), "Buffer too small"); |
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1920 strcpy(my_path, base_path); |
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1921 } else { |
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1922 // Append a sequence number id for dumps following the first |
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1923 char fn[33]; |
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1924 sprintf(fn, ".%d", dump_file_seq); |
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1925 assert(strlen(base_path) + strlen(fn) < sizeof(my_path), "HeapDumpPath too long"); |
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1926 strcpy(my_path, base_path); |
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1927 strcat(my_path, fn); |
| 0 | 1928 } |
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1929 dump_file_seq++; // increment seq number for next time we dump |
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1930 assert(strlen(".hprof") + strlen(my_path) < sizeof(my_path), "HeapDumpPath too long"); |
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1931 strcat(my_path, ".hprof"); |
| 0 | 1932 |
| 1933 HeapDumper dumper(false /* no GC before heap dump */, | |
| 1934 true /* send to tty */); | |
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1935 dumper.dump(my_path); |
| 0 | 1936 } |