Mercurial > hg > truffle
annotate src/share/vm/services/heapDumper.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | 30f67acf635d |
| children | 17c778814856 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 2005, 2010, 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" | |
| 30 #include "memory/genCollectedHeap.hpp" | |
| 31 #include "memory/universe.hpp" | |
| 32 #include "oops/objArrayKlass.hpp" | |
| 33 #include "runtime/javaCalls.hpp" | |
| 34 #include "runtime/jniHandles.hpp" | |
| 35 #include "runtime/reflectionUtils.hpp" | |
| 36 #include "runtime/vframe.hpp" | |
| 37 #include "runtime/vmThread.hpp" | |
| 38 #include "runtime/vm_operations.hpp" | |
| 39 #include "services/heapDumper.hpp" | |
| 40 #include "services/threadService.hpp" | |
| 41 #include "utilities/ostream.hpp" | |
| 42 #ifndef SERIALGC | |
| 43 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
| 44 #endif | |
| 0 | 45 |
| 46 /* | |
| 47 * HPROF binary format - description copied from: | |
| 48 * src/share/demo/jvmti/hprof/hprof_io.c | |
| 49 * | |
| 50 * | |
| 51 * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" | |
| 52 * (0-terminated) | |
| 53 * | |
| 54 * u4 size of identifiers. Identifiers are used to represent | |
| 55 * UTF8 strings, objects, stack traces, etc. They usually | |
| 56 * have the same size as host pointers. For example, on | |
| 57 * Solaris and Win32, the size is 4. | |
| 58 * u4 high word | |
| 59 * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 | |
| 60 * [record]* a sequence of records. | |
| 61 * | |
| 62 * | |
| 63 * Record format: | |
| 64 * | |
| 65 * u1 a TAG denoting the type of the record | |
| 66 * u4 number of *microseconds* since the time stamp in the | |
| 67 * header. (wraps around in a little more than an hour) | |
| 68 * u4 number of bytes *remaining* in the record. Note that | |
| 69 * this number excludes the tag and the length field itself. | |
| 70 * [u1]* BODY of the record (a sequence of bytes) | |
| 71 * | |
| 72 * | |
| 73 * The following TAGs are supported: | |
| 74 * | |
| 75 * TAG BODY notes | |
| 76 *---------------------------------------------------------- | |
| 77 * HPROF_UTF8 a UTF8-encoded name | |
| 78 * | |
| 79 * id name ID | |
| 80 * [u1]* UTF8 characters (no trailing zero) | |
| 81 * | |
| 82 * HPROF_LOAD_CLASS a newly loaded class | |
| 83 * | |
| 84 * u4 class serial number (> 0) | |
| 85 * id class object ID | |
| 86 * u4 stack trace serial number | |
| 87 * id class name ID | |
| 88 * | |
| 89 * HPROF_UNLOAD_CLASS an unloading class | |
| 90 * | |
| 91 * u4 class serial_number | |
| 92 * | |
| 93 * HPROF_FRAME a Java stack frame | |
| 94 * | |
| 95 * id stack frame ID | |
| 96 * id method name ID | |
| 97 * id method signature ID | |
| 98 * id source file name ID | |
| 99 * u4 class serial number | |
| 100 * i4 line number. >0: normal | |
| 101 * -1: unknown | |
| 102 * -2: compiled method | |
| 103 * -3: native method | |
| 104 * | |
| 105 * HPROF_TRACE a Java stack trace | |
| 106 * | |
| 107 * u4 stack trace serial number | |
| 108 * u4 thread serial number | |
| 109 * u4 number of frames | |
| 110 * [id]* stack frame IDs | |
| 111 * | |
| 112 * | |
| 113 * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC | |
| 114 * | |
| 115 * u2 flags 0x0001: incremental vs. complete | |
| 116 * 0x0002: sorted by allocation vs. live | |
| 117 * 0x0004: whether to force a GC | |
| 118 * u4 cutoff ratio | |
| 119 * u4 total live bytes | |
| 120 * u4 total live instances | |
| 121 * u8 total bytes allocated | |
| 122 * u8 total instances allocated | |
| 123 * u4 number of sites that follow | |
| 124 * [u1 is_array: 0: normal object | |
| 125 * 2: object array | |
| 126 * 4: boolean array | |
| 127 * 5: char array | |
| 128 * 6: float array | |
| 129 * 7: double array | |
| 130 * 8: byte array | |
| 131 * 9: short array | |
| 132 * 10: int array | |
| 133 * 11: long array | |
| 134 * u4 class serial number (may be zero during startup) | |
| 135 * u4 stack trace serial number | |
| 136 * u4 number of bytes alive | |
| 137 * u4 number of instances alive | |
| 138 * u4 number of bytes allocated | |
| 139 * u4]* number of instance allocated | |
| 140 * | |
| 141 * HPROF_START_THREAD a newly started thread. | |
| 142 * | |
| 143 * u4 thread serial number (> 0) | |
| 144 * id thread object ID | |
| 145 * u4 stack trace serial number | |
| 146 * id thread name ID | |
| 147 * id thread group name ID | |
| 148 * id thread group parent name ID | |
| 149 * | |
| 150 * HPROF_END_THREAD a terminating thread. | |
| 151 * | |
| 152 * u4 thread serial number | |
| 153 * | |
| 154 * HPROF_HEAP_SUMMARY heap summary | |
| 155 * | |
| 156 * u4 total live bytes | |
| 157 * u4 total live instances | |
| 158 * u8 total bytes allocated | |
| 159 * u8 total instances allocated | |
| 160 * | |
| 161 * HPROF_HEAP_DUMP denote a heap dump | |
| 162 * | |
| 163 * [heap dump sub-records]* | |
| 164 * | |
| 165 * There are four kinds of heap dump sub-records: | |
| 166 * | |
| 167 * u1 sub-record type | |
| 168 * | |
| 169 * HPROF_GC_ROOT_UNKNOWN unknown root | |
| 170 * | |
| 171 * id object ID | |
| 172 * | |
| 173 * HPROF_GC_ROOT_THREAD_OBJ thread object | |
| 174 * | |
| 175 * id thread object ID (may be 0 for a | |
| 176 * thread newly attached through JNI) | |
| 177 * u4 thread sequence number | |
| 178 * u4 stack trace sequence number | |
| 179 * | |
| 180 * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root | |
| 181 * | |
| 182 * id object ID | |
| 183 * id JNI global ref ID | |
| 184 * | |
| 185 * HPROF_GC_ROOT_JNI_LOCAL JNI local ref | |
| 186 * | |
| 187 * id object ID | |
| 188 * u4 thread serial number | |
| 189 * u4 frame # in stack trace (-1 for empty) | |
| 190 * | |
| 191 * HPROF_GC_ROOT_JAVA_FRAME Java stack frame | |
| 192 * | |
| 193 * id object ID | |
| 194 * u4 thread serial number | |
| 195 * u4 frame # in stack trace (-1 for empty) | |
| 196 * | |
| 197 * HPROF_GC_ROOT_NATIVE_STACK Native stack | |
| 198 * | |
| 199 * id object ID | |
| 200 * u4 thread serial number | |
| 201 * | |
| 202 * HPROF_GC_ROOT_STICKY_CLASS System class | |
| 203 * | |
| 204 * id object ID | |
| 205 * | |
| 206 * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block | |
| 207 * | |
| 208 * id object ID | |
| 209 * u4 thread serial number | |
| 210 * | |
| 211 * HPROF_GC_ROOT_MONITOR_USED Busy monitor | |
| 212 * | |
| 213 * id object ID | |
| 214 * | |
| 215 * HPROF_GC_CLASS_DUMP dump of a class object | |
| 216 * | |
| 217 * id class object ID | |
| 218 * u4 stack trace serial number | |
| 219 * id super class object ID | |
| 220 * id class loader object ID | |
| 221 * id signers object ID | |
| 222 * id protection domain object ID | |
| 223 * id reserved | |
| 224 * id reserved | |
| 225 * | |
| 226 * u4 instance size (in bytes) | |
| 227 * | |
| 228 * u2 size of constant pool | |
| 229 * [u2, constant pool index, | |
| 230 * ty, type | |
| 231 * 2: object | |
| 232 * 4: boolean | |
| 233 * 5: char | |
| 234 * 6: float | |
| 235 * 7: double | |
| 236 * 8: byte | |
| 237 * 9: short | |
| 238 * 10: int | |
| 239 * 11: long | |
| 240 * vl]* and value | |
| 241 * | |
| 242 * u2 number of static fields | |
| 243 * [id, static field name, | |
| 244 * ty, type, | |
| 245 * vl]* and value | |
| 246 * | |
| 247 * u2 number of inst. fields (not inc. super) | |
| 248 * [id, instance field name, | |
| 249 * ty]* type | |
| 250 * | |
| 251 * HPROF_GC_INSTANCE_DUMP dump of a normal object | |
| 252 * | |
| 253 * id object ID | |
| 254 * u4 stack trace serial number | |
| 255 * id class object ID | |
| 256 * u4 number of bytes that follow | |
| 257 * [vl]* instance field values (class, followed | |
| 258 * by super, super's super ...) | |
| 259 * | |
| 260 * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array | |
| 261 * | |
| 262 * id array object ID | |
| 263 * u4 stack trace serial number | |
| 264 * u4 number of elements | |
| 265 * id array class ID | |
| 266 * [id]* elements | |
| 267 * | |
| 268 * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array | |
| 269 * | |
| 270 * id array object ID | |
| 271 * u4 stack trace serial number | |
| 272 * u4 number of elements | |
| 273 * u1 element type | |
| 274 * 4: boolean array | |
| 275 * 5: char array | |
| 276 * 6: float array | |
| 277 * 7: double array | |
| 278 * 8: byte array | |
| 279 * 9: short array | |
| 280 * 10: int array | |
| 281 * 11: long array | |
| 282 * [u1]* elements | |
| 283 * | |
| 284 * HPROF_CPU_SAMPLES a set of sample traces of running threads | |
| 285 * | |
| 286 * u4 total number of samples | |
| 287 * u4 # of traces | |
| 288 * [u4 # of samples | |
| 289 * u4]* stack trace serial number | |
| 290 * | |
| 291 * HPROF_CONTROL_SETTINGS the settings of on/off switches | |
| 292 * | |
| 293 * u4 0x00000001: alloc traces on/off | |
| 294 * 0x00000002: cpu sampling on/off | |
| 295 * u2 stack trace depth | |
| 296 * | |
| 297 * | |
| 298 * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally | |
| 299 * be generated as a sequence of heap dump segments. This sequence is | |
| 300 * terminated by an end record. The additional tags allowed by format | |
| 301 * "JAVA PROFILE 1.0.2" are: | |
| 302 * | |
| 303 * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment | |
| 304 * | |
| 305 * [heap dump sub-records]* | |
| 306 * The same sub-record types allowed by HPROF_HEAP_DUMP | |
| 307 * | |
| 308 * HPROF_HEAP_DUMP_END denotes the end of a heap dump | |
| 309 * | |
| 310 */ | |
| 311 | |
| 312 | |
| 313 // HPROF tags | |
| 314 | |
| 315 typedef enum { | |
| 316 // top-level records | |
| 317 HPROF_UTF8 = 0x01, | |
| 318 HPROF_LOAD_CLASS = 0x02, | |
| 319 HPROF_UNLOAD_CLASS = 0x03, | |
| 320 HPROF_FRAME = 0x04, | |
| 321 HPROF_TRACE = 0x05, | |
| 322 HPROF_ALLOC_SITES = 0x06, | |
| 323 HPROF_HEAP_SUMMARY = 0x07, | |
| 324 HPROF_START_THREAD = 0x0A, | |
| 325 HPROF_END_THREAD = 0x0B, | |
| 326 HPROF_HEAP_DUMP = 0x0C, | |
| 327 HPROF_CPU_SAMPLES = 0x0D, | |
| 328 HPROF_CONTROL_SETTINGS = 0x0E, | |
| 329 | |
| 330 // 1.0.2 record types | |
| 331 HPROF_HEAP_DUMP_SEGMENT = 0x1C, | |
| 332 HPROF_HEAP_DUMP_END = 0x2C, | |
| 333 | |
| 334 // field types | |
| 335 HPROF_ARRAY_OBJECT = 0x01, | |
| 336 HPROF_NORMAL_OBJECT = 0x02, | |
| 337 HPROF_BOOLEAN = 0x04, | |
| 338 HPROF_CHAR = 0x05, | |
| 339 HPROF_FLOAT = 0x06, | |
| 340 HPROF_DOUBLE = 0x07, | |
| 341 HPROF_BYTE = 0x08, | |
| 342 HPROF_SHORT = 0x09, | |
| 343 HPROF_INT = 0x0A, | |
| 344 HPROF_LONG = 0x0B, | |
| 345 | |
| 346 // data-dump sub-records | |
| 347 HPROF_GC_ROOT_UNKNOWN = 0xFF, | |
| 348 HPROF_GC_ROOT_JNI_GLOBAL = 0x01, | |
| 349 HPROF_GC_ROOT_JNI_LOCAL = 0x02, | |
| 350 HPROF_GC_ROOT_JAVA_FRAME = 0x03, | |
| 351 HPROF_GC_ROOT_NATIVE_STACK = 0x04, | |
| 352 HPROF_GC_ROOT_STICKY_CLASS = 0x05, | |
| 353 HPROF_GC_ROOT_THREAD_BLOCK = 0x06, | |
| 354 HPROF_GC_ROOT_MONITOR_USED = 0x07, | |
| 355 HPROF_GC_ROOT_THREAD_OBJ = 0x08, | |
| 356 HPROF_GC_CLASS_DUMP = 0x20, | |
| 357 HPROF_GC_INSTANCE_DUMP = 0x21, | |
| 358 HPROF_GC_OBJ_ARRAY_DUMP = 0x22, | |
| 359 HPROF_GC_PRIM_ARRAY_DUMP = 0x23 | |
| 360 } hprofTag; | |
| 361 | |
| 362 // Default stack trace ID (used for dummy HPROF_TRACE record) | |
| 363 enum { | |
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364 STACK_TRACE_ID = 1, |
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365 INITIAL_CLASS_COUNT = 200 |
| 0 | 366 }; |
| 367 | |
| 368 // Supports I/O operations on a dump file | |
| 369 | |
| 370 class DumpWriter : public StackObj { | |
| 371 private: | |
| 372 enum { | |
| 373 io_buffer_size = 8*M | |
| 374 }; | |
| 375 | |
| 376 int _fd; // file descriptor (-1 if dump file not open) | |
| 377 jlong _bytes_written; // number of byte written to dump file | |
| 378 | |
| 379 char* _buffer; // internal buffer | |
| 380 int _size; | |
| 381 int _pos; | |
| 382 | |
| 383 char* _error; // error message when I/O fails | |
| 384 | |
| 385 void set_file_descriptor(int fd) { _fd = fd; } | |
| 386 int file_descriptor() const { return _fd; } | |
| 387 | |
| 388 char* buffer() const { return _buffer; } | |
| 389 int buffer_size() const { return _size; } | |
| 390 int position() const { return _pos; } | |
| 391 void set_position(int pos) { _pos = pos; } | |
| 392 | |
| 393 void set_error(const char* error) { _error = (char*)os::strdup(error); } | |
| 394 | |
| 395 // all I/O go through this function | |
| 396 void write_internal(void* s, int len); | |
| 397 | |
| 398 public: | |
| 399 DumpWriter(const char* path); | |
| 400 ~DumpWriter(); | |
| 401 | |
| 402 void close(); | |
| 403 bool is_open() const { return file_descriptor() >= 0; } | |
| 404 void flush(); | |
| 405 | |
| 406 // total number of bytes written to the disk | |
| 407 jlong bytes_written() const { return _bytes_written; } | |
| 408 | |
| 409 // adjust the number of bytes written to disk (used to keep the count | |
| 410 // of the number of bytes written in case of rewrites) | |
| 411 void adjust_bytes_written(jlong n) { _bytes_written += n; } | |
| 412 | |
| 413 // number of (buffered) bytes as yet unwritten to the dump file | |
| 414 jlong bytes_unwritten() const { return (jlong)position(); } | |
| 415 | |
| 416 char* error() const { return _error; } | |
| 417 | |
| 418 jlong current_offset(); | |
| 419 void seek_to_offset(jlong pos); | |
| 420 | |
| 421 // writer functions | |
| 422 void write_raw(void* s, int len); | |
| 423 void write_u1(u1 x) { write_raw((void*)&x, 1); } | |
| 424 void write_u2(u2 x); | |
| 425 void write_u4(u4 x); | |
| 426 void write_u8(u8 x); | |
| 427 void write_objectID(oop o); | |
| 428 void write_classID(Klass* k); | |
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429 void write_id(u4 x); |
| 0 | 430 }; |
| 431 | |
| 432 DumpWriter::DumpWriter(const char* path) { | |
| 433 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
| 434 // sufficient memory then reduce size until we can allocate something. | |
| 435 _size = io_buffer_size; | |
| 436 do { | |
| 437 _buffer = (char*)os::malloc(_size); | |
| 438 if (_buffer == NULL) { | |
| 439 _size = _size >> 1; | |
| 440 } | |
| 441 } while (_buffer == NULL && _size > 0); | |
| 442 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
| 443 _pos = 0; | |
| 444 _error = NULL; | |
| 445 _bytes_written = 0L; | |
| 446 _fd = os::create_binary_file(path, false); // don't replace existing file | |
| 447 | |
| 448 // if the open failed we record the error | |
| 449 if (_fd < 0) { | |
| 450 _error = (char*)os::strdup(strerror(errno)); | |
| 451 } | |
| 452 } | |
| 453 | |
| 454 DumpWriter::~DumpWriter() { | |
| 455 // flush and close dump file | |
| 456 if (file_descriptor() >= 0) { | |
| 457 close(); | |
| 458 } | |
| 459 if (_buffer != NULL) os::free(_buffer); | |
| 460 if (_error != NULL) os::free(_error); | |
| 461 } | |
| 462 | |
| 463 // closes dump file (if open) | |
| 464 void DumpWriter::close() { | |
| 465 // flush and close dump file | |
| 466 if (file_descriptor() >= 0) { | |
| 467 flush(); | |
| 468 ::close(file_descriptor()); | |
| 469 } | |
| 470 } | |
| 471 | |
| 472 // write directly to the file | |
| 473 void DumpWriter::write_internal(void* s, int len) { | |
| 474 if (is_open()) { | |
| 475 int n = ::write(file_descriptor(), s, len); | |
| 476 if (n > 0) { | |
| 477 _bytes_written += n; | |
| 478 } | |
| 479 if (n != len) { | |
| 480 if (n < 0) { | |
| 481 set_error(strerror(errno)); | |
| 482 } else { | |
| 483 set_error("file size limit"); | |
| 484 } | |
| 485 ::close(file_descriptor()); | |
| 486 set_file_descriptor(-1); | |
| 487 } | |
| 488 } | |
| 489 } | |
| 490 | |
| 491 // write raw bytes | |
| 492 void DumpWriter::write_raw(void* s, int len) { | |
| 493 if (is_open()) { | |
| 494 // flush buffer to make toom | |
| 495 if ((position()+ len) >= buffer_size()) { | |
| 496 flush(); | |
| 497 } | |
| 498 | |
| 499 // buffer not available or too big to buffer it | |
| 500 if ((buffer() == NULL) || (len >= buffer_size())) { | |
| 501 write_internal(s, len); | |
| 502 } else { | |
| 503 // Should optimize this for u1/u2/u4/u8 sizes. | |
| 504 memcpy(buffer() + position(), s, len); | |
| 505 set_position(position() + len); | |
| 506 } | |
| 507 } | |
| 508 } | |
| 509 | |
| 510 // flush any buffered bytes to the file | |
| 511 void DumpWriter::flush() { | |
| 512 if (is_open() && position() > 0) { | |
| 513 write_internal(buffer(), position()); | |
| 514 set_position(0); | |
| 515 } | |
| 516 } | |
| 517 | |
| 518 | |
| 519 jlong DumpWriter::current_offset() { | |
| 520 if (is_open()) { | |
| 521 // the offset is the file offset plus whatever we have buffered | |
| 522 jlong offset = os::current_file_offset(file_descriptor()); | |
| 523 assert(offset >= 0, "lseek failed"); | |
| 524 return offset + (jlong)position(); | |
| 525 } else { | |
| 526 return (jlong)-1; | |
| 527 } | |
| 528 } | |
| 529 | |
| 530 void DumpWriter::seek_to_offset(jlong off) { | |
| 531 assert(off >= 0, "bad offset"); | |
| 532 | |
| 533 // need to flush before seeking | |
| 534 flush(); | |
| 535 | |
| 536 // may be closed due to I/O error | |
| 537 if (is_open()) { | |
| 538 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
| 539 assert(n >= 0, "lseek failed"); | |
| 540 } | |
| 541 } | |
| 542 | |
| 543 void DumpWriter::write_u2(u2 x) { | |
| 544 u2 v; | |
| 545 Bytes::put_Java_u2((address)&v, x); | |
| 546 write_raw((void*)&v, 2); | |
| 547 } | |
| 548 | |
| 549 void DumpWriter::write_u4(u4 x) { | |
| 550 u4 v; | |
| 551 Bytes::put_Java_u4((address)&v, x); | |
| 552 write_raw((void*)&v, 4); | |
| 553 } | |
| 554 | |
| 555 void DumpWriter::write_u8(u8 x) { | |
| 556 u8 v; | |
| 557 Bytes::put_Java_u8((address)&v, x); | |
| 558 write_raw((void*)&v, 8); | |
| 559 } | |
| 560 | |
| 561 void DumpWriter::write_objectID(oop o) { | |
| 562 address a = (address)((uintptr_t)o); | |
| 563 #ifdef _LP64 | |
| 564 write_u8((u8)a); | |
| 565 #else | |
| 566 write_u4((u4)a); | |
| 567 #endif | |
| 568 } | |
| 569 | |
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570 void DumpWriter::write_id(u4 x) { |
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571 #ifdef _LP64 |
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572 write_u8((u8) x); |
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573 #else |
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574 write_u4(x); |
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575 #endif |
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576 } |
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577 |
| 0 | 578 // We use java mirror as the class ID |
| 579 void DumpWriter::write_classID(Klass* k) { | |
| 580 write_objectID(k->java_mirror()); | |
| 581 } | |
| 582 | |
| 583 | |
| 584 | |
| 585 // Support class with a collection of functions used when dumping the heap | |
| 586 | |
| 587 class DumperSupport : AllStatic { | |
| 588 public: | |
| 589 | |
| 590 // write a header of the given type | |
| 591 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
| 592 | |
| 593 // returns hprof tag for the given type signature | |
| 594 static hprofTag sig2tag(symbolOop sig); | |
| 595 // returns hprof tag for the given basic type | |
| 596 static hprofTag type2tag(BasicType type); | |
| 597 | |
| 598 // returns the size of the instance of the given class | |
| 599 static u4 instance_size(klassOop k); | |
| 600 | |
| 601 // dump a jfloat | |
| 602 static void dump_float(DumpWriter* writer, jfloat f); | |
| 603 // dump a jdouble | |
| 604 static void dump_double(DumpWriter* writer, jdouble d); | |
| 605 // dumps the raw value of the given field | |
| 606 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
| 607 // dumps static fields of the given class | |
| 608 static void dump_static_fields(DumpWriter* writer, klassOop k); | |
| 609 // dump the raw values of the instance fields of the given object | |
| 610 static void dump_instance_fields(DumpWriter* writer, oop o); | |
| 611 // dumps the definition of the instance fields for a given class | |
| 612 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); | |
| 613 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 614 static void dump_instance(DumpWriter* writer, oop o); | |
| 615 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
| 616 // array classes | |
| 617 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); | |
| 618 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 619 // class (and each multi-dimensional array class too) | |
| 620 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); | |
| 621 | |
| 622 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 623 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
| 624 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 625 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
|
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626 // create HPROF_FRAME record for the given method and bci |
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627 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, methodOop m, int bci); |
| 0 | 628 }; |
| 629 | |
| 630 // write a header of the given type | |
| 631 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
| 632 writer->write_u1((u1)tag); | |
| 633 writer->write_u4(0); // current ticks | |
| 634 writer->write_u4(len); | |
| 635 } | |
| 636 | |
| 637 // returns hprof tag for the given type signature | |
| 638 hprofTag DumperSupport::sig2tag(symbolOop sig) { | |
| 639 switch (sig->byte_at(0)) { | |
| 640 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
| 641 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
| 642 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
| 643 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
| 644 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
| 645 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
| 646 case JVM_SIGNATURE_INT : return HPROF_INT; | |
| 647 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
| 648 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
| 649 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
| 650 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 651 } | |
| 652 } | |
| 653 | |
| 654 hprofTag DumperSupport::type2tag(BasicType type) { | |
| 655 switch (type) { | |
| 656 case T_BYTE : return HPROF_BYTE; | |
| 657 case T_CHAR : return HPROF_CHAR; | |
| 658 case T_FLOAT : return HPROF_FLOAT; | |
| 659 case T_DOUBLE : return HPROF_DOUBLE; | |
| 660 case T_INT : return HPROF_INT; | |
| 661 case T_LONG : return HPROF_LONG; | |
| 662 case T_SHORT : return HPROF_SHORT; | |
| 663 case T_BOOLEAN : return HPROF_BOOLEAN; | |
| 664 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 665 } | |
| 666 } | |
| 667 | |
| 668 // dump a jfloat | |
| 669 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
| 670 if (g_isnan(f)) { | |
| 671 writer->write_u4(0x7fc00000); // collapsing NaNs | |
| 672 } else { | |
| 673 union { | |
| 674 int i; | |
| 675 float f; | |
| 676 } u; | |
| 677 u.f = (float)f; | |
| 678 writer->write_u4((u4)u.i); | |
| 679 } | |
| 680 } | |
| 681 | |
| 682 // dump a jdouble | |
| 683 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
| 684 union { | |
| 685 jlong l; | |
| 686 double d; | |
| 687 } u; | |
| 688 if (g_isnan(d)) { // collapsing NaNs | |
| 689 u.l = (jlong)(0x7ff80000); | |
| 690 u.l = (u.l << 32); | |
| 691 } else { | |
| 692 u.d = (double)d; | |
| 693 } | |
| 694 writer->write_u8((u8)u.l); | |
| 695 } | |
| 696 | |
| 697 // dumps the raw value of the given field | |
| 698 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
| 699 switch (type) { | |
| 700 case JVM_SIGNATURE_CLASS : | |
| 701 case JVM_SIGNATURE_ARRAY : { | |
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702 oop o; |
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703 if (UseCompressedOops) { |
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704 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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705 } else { |
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706 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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707 } |
| 0 | 708 |
| 709 // reflection and sun.misc.Unsafe classes may have a reference to a | |
| 710 // klassOop so filter it out. | |
| 711 if (o != NULL && o->is_klass()) { | |
| 712 o = NULL; | |
| 713 } | |
| 714 | |
| 715 // FIXME: When sharing is enabled we don't emit field references to objects | |
| 716 // in shared spaces. We can remove this once we write records for the classes | |
| 717 // and strings that are shared. | |
| 718 if (o != NULL && o->is_shared()) { | |
| 719 o = NULL; | |
| 720 } | |
| 721 writer->write_objectID(o); | |
| 722 break; | |
| 723 } | |
| 724 case JVM_SIGNATURE_BYTE : { | |
| 725 jbyte* b = (jbyte*)addr; | |
| 726 writer->write_u1((u1)*b); | |
| 727 break; | |
| 728 } | |
| 729 case JVM_SIGNATURE_CHAR : { | |
| 730 jchar* c = (jchar*)addr; | |
| 731 writer->write_u2((u2)*c); | |
| 732 break; | |
| 733 } | |
| 734 case JVM_SIGNATURE_SHORT : { | |
| 735 jshort* s = (jshort*)addr; | |
| 736 writer->write_u2((u2)*s); | |
| 737 break; | |
| 738 } | |
| 739 case JVM_SIGNATURE_FLOAT : { | |
| 740 jfloat* f = (jfloat*)addr; | |
| 741 dump_float(writer, *f); | |
| 742 break; | |
| 743 } | |
| 744 case JVM_SIGNATURE_DOUBLE : { | |
| 745 jdouble* f = (jdouble*)addr; | |
| 746 dump_double(writer, *f); | |
| 747 break; | |
| 748 } | |
| 749 case JVM_SIGNATURE_INT : { | |
| 750 jint* i = (jint*)addr; | |
| 751 writer->write_u4((u4)*i); | |
| 752 break; | |
| 753 } | |
| 754 case JVM_SIGNATURE_LONG : { | |
| 755 jlong* l = (jlong*)addr; | |
| 756 writer->write_u8((u8)*l); | |
| 757 break; | |
| 758 } | |
| 759 case JVM_SIGNATURE_BOOLEAN : { | |
| 760 jboolean* b = (jboolean*)addr; | |
| 761 writer->write_u1((u1)*b); | |
| 762 break; | |
| 763 } | |
| 764 default : ShouldNotReachHere(); | |
| 765 } | |
| 766 } | |
| 767 | |
| 768 // returns the size of the instance of the given class | |
| 769 u4 DumperSupport::instance_size(klassOop k) { | |
| 770 HandleMark hm; | |
| 771 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 772 | |
| 773 int size = 0; | |
| 774 | |
| 775 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 776 if (!fld.access_flags().is_static()) { | |
| 777 symbolOop sig = fld.signature(); | |
| 778 switch (sig->byte_at(0)) { | |
| 779 case JVM_SIGNATURE_CLASS : | |
| 780 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
| 781 | |
| 782 case JVM_SIGNATURE_BYTE : | |
| 783 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
| 784 | |
| 785 case JVM_SIGNATURE_CHAR : | |
| 786 case JVM_SIGNATURE_SHORT : size += 2; break; | |
| 787 | |
| 788 case JVM_SIGNATURE_INT : | |
| 789 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
| 790 | |
| 791 case JVM_SIGNATURE_LONG : | |
| 792 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
| 793 | |
| 794 default : ShouldNotReachHere(); | |
| 795 } | |
| 796 } | |
| 797 } | |
| 798 return (u4)size; | |
| 799 } | |
| 800 | |
| 801 // dumps static fields of the given class | |
| 802 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { | |
| 803 HandleMark hm; | |
| 804 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 805 | |
| 806 // pass 1 - count the static fields | |
| 807 u2 field_count = 0; | |
| 808 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 809 if (fldc.access_flags().is_static()) field_count++; | |
| 810 } | |
| 811 | |
| 812 writer->write_u2(field_count); | |
| 813 | |
| 814 // pass 2 - dump the field descriptors and raw values | |
| 815 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 816 if (fld.access_flags().is_static()) { | |
| 817 symbolOop sig = fld.signature(); | |
| 818 | |
| 819 writer->write_objectID(fld.name()); // name | |
| 820 writer->write_u1(sig2tag(sig)); // type | |
| 821 | |
| 822 // value | |
| 823 int offset = fld.offset(); | |
| 824 address addr = (address)k + offset; | |
| 825 | |
| 826 dump_field_value(writer, sig->byte_at(0), addr); | |
| 827 } | |
| 828 } | |
| 829 } | |
| 830 | |
| 831 // dump the raw values of the instance fields of the given object | |
| 832 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
| 833 HandleMark hm; | |
| 834 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
| 835 | |
| 836 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 837 if (!fld.access_flags().is_static()) { | |
| 838 symbolOop sig = fld.signature(); | |
| 839 address addr = (address)o + fld.offset(); | |
| 840 | |
| 841 dump_field_value(writer, sig->byte_at(0), addr); | |
| 842 } | |
| 843 } | |
| 844 } | |
| 845 | |
| 846 // dumps the definition of the instance fields for a given class | |
| 847 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { | |
| 848 HandleMark hm; | |
| 849 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 850 | |
| 851 // pass 1 - count the instance fields | |
| 852 u2 field_count = 0; | |
| 853 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 854 if (!fldc.access_flags().is_static()) field_count++; | |
| 855 } | |
| 856 | |
| 857 writer->write_u2(field_count); | |
| 858 | |
| 859 // pass 2 - dump the field descriptors | |
| 860 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 861 if (!fld.access_flags().is_static()) { | |
| 862 symbolOop sig = fld.signature(); | |
| 863 | |
| 864 writer->write_objectID(fld.name()); // name | |
| 865 writer->write_u1(sig2tag(sig)); // type | |
| 866 } | |
| 867 } | |
| 868 } | |
| 869 | |
| 870 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 871 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
| 872 klassOop k = o->klass(); | |
| 873 | |
| 874 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
| 875 writer->write_objectID(o); | |
| 876 writer->write_u4(STACK_TRACE_ID); | |
| 877 | |
| 878 // class ID | |
| 879 writer->write_classID(Klass::cast(k)); | |
| 880 | |
| 881 // number of bytes that follow | |
| 882 writer->write_u4(instance_size(k) ); | |
| 883 | |
| 884 // field values | |
| 885 dump_instance_fields(writer, o); | |
| 886 } | |
| 887 | |
| 888 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
| 889 // its array classes | |
| 890 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { | |
| 891 Klass* klass = Klass::cast(k); | |
| 892 assert(klass->oop_is_instance(), "not an instanceKlass"); | |
| 893 instanceKlass* ik = (instanceKlass*)klass; | |
| 894 | |
| 895 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 896 | |
| 897 // class ID | |
| 898 writer->write_classID(ik); | |
| 899 writer->write_u4(STACK_TRACE_ID); | |
| 900 | |
| 901 // super class ID | |
| 902 klassOop java_super = ik->java_super(); | |
| 903 if (java_super == NULL) { | |
| 904 writer->write_objectID(NULL); | |
| 905 } else { | |
| 906 writer->write_classID(Klass::cast(java_super)); | |
| 907 } | |
| 908 | |
| 909 writer->write_objectID(ik->class_loader()); | |
| 910 writer->write_objectID(ik->signers()); | |
| 911 writer->write_objectID(ik->protection_domain()); | |
| 912 | |
| 913 // reserved | |
| 914 writer->write_objectID(NULL); | |
| 915 writer->write_objectID(NULL); | |
| 916 | |
| 917 // instance size | |
| 918 writer->write_u4(DumperSupport::instance_size(k)); | |
| 919 | |
| 920 // size of constant pool - ignored by HAT 1.1 | |
| 921 writer->write_u2(0); | |
| 922 | |
| 923 // number of static fields | |
| 924 dump_static_fields(writer, k); | |
| 925 | |
| 926 // description of instance fields | |
| 927 dump_instance_field_descriptors(writer, k); | |
| 928 | |
| 929 // array classes | |
| 930 k = klass->array_klass_or_null(); | |
| 931 while (k != NULL) { | |
| 932 Klass* klass = Klass::cast(k); | |
| 933 assert(klass->oop_is_objArray(), "not an objArrayKlass"); | |
| 934 | |
| 935 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 936 writer->write_classID(klass); | |
| 937 writer->write_u4(STACK_TRACE_ID); | |
| 938 | |
| 939 // super class of array classes is java.lang.Object | |
| 940 java_super = klass->java_super(); | |
| 941 assert(java_super != NULL, "checking"); | |
| 942 writer->write_classID(Klass::cast(java_super)); | |
| 943 | |
| 944 writer->write_objectID(ik->class_loader()); | |
| 945 writer->write_objectID(ik->signers()); | |
| 946 writer->write_objectID(ik->protection_domain()); | |
| 947 | |
| 948 writer->write_objectID(NULL); // reserved | |
| 949 writer->write_objectID(NULL); | |
| 950 writer->write_u4(0); // instance size | |
| 951 writer->write_u2(0); // constant pool | |
| 952 writer->write_u2(0); // static fields | |
| 953 writer->write_u2(0); // instance fields | |
| 954 | |
| 955 // get the array class for the next rank | |
| 956 k = klass->array_klass_or_null(); | |
| 957 } | |
| 958 } | |
| 959 | |
| 960 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 961 // class (and each multi-dimensional array class too) | |
| 962 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { | |
| 963 // array classes | |
| 964 while (k != NULL) { | |
| 965 Klass* klass = Klass::cast(k); | |
| 966 | |
| 967 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 968 writer->write_classID(klass); | |
| 969 writer->write_u4(STACK_TRACE_ID); | |
| 970 | |
| 971 // super class of array classes is java.lang.Object | |
| 972 klassOop java_super = klass->java_super(); | |
| 973 assert(java_super != NULL, "checking"); | |
| 974 writer->write_classID(Klass::cast(java_super)); | |
| 975 | |
| 976 writer->write_objectID(NULL); // loader | |
| 977 writer->write_objectID(NULL); // signers | |
| 978 writer->write_objectID(NULL); // protection domain | |
| 979 | |
| 980 writer->write_objectID(NULL); // reserved | |
| 981 writer->write_objectID(NULL); | |
| 982 writer->write_u4(0); // instance size | |
| 983 writer->write_u2(0); // constant pool | |
| 984 writer->write_u2(0); // static fields | |
| 985 writer->write_u2(0); // instance fields | |
| 986 | |
| 987 // get the array class for the next rank | |
| 988 k = klass->array_klass_or_null(); | |
| 989 } | |
| 990 } | |
| 991 | |
| 992 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 993 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
| 994 | |
| 995 // filter this | |
| 996 if (array->klass() == Universe::systemObjArrayKlassObj()) return; | |
| 997 | |
| 998 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
| 999 writer->write_objectID(array); | |
| 1000 writer->write_u4(STACK_TRACE_ID); | |
| 1001 writer->write_u4((u4)array->length()); | |
| 1002 | |
| 1003 // array class ID | |
| 1004 writer->write_classID(Klass::cast(array->klass())); | |
| 1005 | |
| 1006 // [id]* elements | |
| 1007 for (int index=0; index<array->length(); index++) { | |
| 1008 oop o = array->obj_at(index); | |
| 1009 writer->write_objectID(o); | |
| 1010 } | |
| 1011 } | |
| 1012 | |
| 1013 #define WRITE_ARRAY(Array, Type, Size) \ | |
| 1014 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
| 1015 | |
| 1016 | |
| 1017 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 1018 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
| 1019 BasicType type = typeArrayKlass::cast(array->klass())->element_type(); | |
| 1020 | |
| 1021 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
| 1022 writer->write_objectID(array); | |
| 1023 writer->write_u4(STACK_TRACE_ID); | |
| 1024 writer->write_u4((u4)array->length()); | |
| 1025 writer->write_u1(type2tag(type)); | |
| 1026 | |
| 1027 // nothing to copy | |
| 1028 if (array->length() == 0) { | |
| 1029 return; | |
| 1030 } | |
| 1031 | |
| 1032 // If the byte ordering is big endian then we can copy most types directly | |
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1033 int length_in_bytes = array->length() * type2aelembytes(type); |
| 0 | 1034 assert(length_in_bytes > 0, "nothing to copy"); |
| 1035 | |
| 1036 switch (type) { | |
| 1037 case T_INT : { | |
| 1038 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1039 WRITE_ARRAY(array, int, u4); | |
| 1040 } else { | |
| 1041 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
| 1042 } | |
| 1043 break; | |
| 1044 } | |
| 1045 case T_BYTE : { | |
| 1046 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
| 1047 break; | |
| 1048 } | |
| 1049 case T_CHAR : { | |
| 1050 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1051 WRITE_ARRAY(array, char, u2); | |
| 1052 } else { | |
| 1053 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
| 1054 } | |
| 1055 break; | |
| 1056 } | |
| 1057 case T_SHORT : { | |
| 1058 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1059 WRITE_ARRAY(array, short, u2); | |
| 1060 } else { | |
| 1061 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
| 1062 } | |
| 1063 break; | |
| 1064 } | |
| 1065 case T_BOOLEAN : { | |
| 1066 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1067 WRITE_ARRAY(array, bool, u1); | |
| 1068 } else { | |
| 1069 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
| 1070 } | |
| 1071 break; | |
| 1072 } | |
| 1073 case T_LONG : { | |
| 1074 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1075 WRITE_ARRAY(array, long, u8); | |
| 1076 } else { | |
| 1077 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
| 1078 } | |
| 1079 break; | |
| 1080 } | |
| 1081 | |
| 1082 // handle float/doubles in a special value to ensure than NaNs are | |
| 1083 // written correctly. TO DO: Check if we can avoid this on processors that | |
| 1084 // use IEEE 754. | |
| 1085 | |
| 1086 case T_FLOAT : { | |
| 1087 for (int i=0; i<array->length(); i++) { | |
| 1088 dump_float( writer, array->float_at(i) ); | |
| 1089 } | |
| 1090 break; | |
| 1091 } | |
| 1092 case T_DOUBLE : { | |
| 1093 for (int i=0; i<array->length(); i++) { | |
| 1094 dump_double( writer, array->double_at(i) ); | |
| 1095 } | |
| 1096 break; | |
| 1097 } | |
| 1098 default : ShouldNotReachHere(); | |
| 1099 } | |
| 1100 } | |
| 1101 | |
|
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1102 // create a HPROF_FRAME record of the given methodOop and bci |
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1103 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1104 int frame_serial_num, |
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1105 int class_serial_num, |
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1106 methodOop m, |
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1107 int bci) { |
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1108 int line_number; |
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1109 if (m->is_native()) { |
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1110 line_number = -3; // native frame |
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1111 } else { |
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1112 line_number = m->line_number_from_bci(bci); |
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1113 } |
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1114 |
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1115 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1116 writer->write_id(frame_serial_num); // frame serial number |
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1117 writer->write_objectID(m->name()); // method's name |
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1118 writer->write_objectID(m->signature()); // method's signature |
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1119 |
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1120 assert(Klass::cast(m->method_holder())->oop_is_instance(), "not instanceKlass"); |
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1121 writer->write_objectID(instanceKlass::cast(m->method_holder())->source_file_name()); // source file name |
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1122 writer->write_u4(class_serial_num); // class serial number |
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1123 writer->write_u4((u4) line_number); // line number |
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1124 } |
| 0 | 1125 |
| 1126 // Support class used to generate HPROF_UTF8 records from the entries in the | |
| 1127 // SymbolTable. | |
| 1128 | |
| 1129 class SymbolTableDumper : public OopClosure { | |
| 1130 private: | |
| 1131 DumpWriter* _writer; | |
| 1132 DumpWriter* writer() const { return _writer; } | |
| 1133 public: | |
| 1134 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
| 1135 void do_oop(oop* obj_p); | |
|
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1136 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1137 }; |
| 1138 | |
| 1139 void SymbolTableDumper::do_oop(oop* obj_p) { | |
| 1140 ResourceMark rm; | |
| 1141 symbolOop sym = (symbolOop)*obj_p; | |
| 1142 | |
| 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); | |
| 1147 writer()->write_objectID(sym); | |
| 1148 writer()->write_raw(s, len); | |
| 1149 } | |
| 1150 } | |
| 1151 | |
| 1152 | |
| 1153 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
| 1154 | |
| 1155 class JNILocalsDumper : public OopClosure { | |
| 1156 private: | |
| 1157 DumpWriter* _writer; | |
| 1158 u4 _thread_serial_num; | |
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1159 int _frame_num; |
| 0 | 1160 DumpWriter* writer() const { return _writer; } |
| 1161 public: | |
| 1162 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
| 1163 _writer = writer; | |
| 1164 _thread_serial_num = thread_serial_num; | |
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1165 _frame_num = -1; // default - empty stack |
| 0 | 1166 } |
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1167 void set_frame_number(int n) { _frame_num = n; } |
| 0 | 1168 void do_oop(oop* obj_p); |
|
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1169 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1170 }; |
| 1171 | |
| 1172 | |
| 1173 void JNILocalsDumper::do_oop(oop* obj_p) { | |
| 1174 // ignore null or deleted handles | |
| 1175 oop o = *obj_p; | |
| 1176 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
| 1177 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
| 1178 writer()->write_objectID(o); | |
| 1179 writer()->write_u4(_thread_serial_num); | |
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1180 writer()->write_u4((u4)_frame_num); |
| 0 | 1181 } |
| 1182 } | |
| 1183 | |
| 1184 | |
| 1185 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
| 1186 | |
| 1187 class JNIGlobalsDumper : public OopClosure { | |
| 1188 private: | |
| 1189 DumpWriter* _writer; | |
| 1190 DumpWriter* writer() const { return _writer; } | |
| 1191 | |
| 1192 public: | |
| 1193 JNIGlobalsDumper(DumpWriter* writer) { | |
| 1194 _writer = writer; | |
| 1195 } | |
| 1196 void do_oop(oop* obj_p); | |
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1197 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1198 }; |
| 1199 | |
| 1200 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
| 1201 oop o = *obj_p; | |
| 1202 | |
| 1203 // ignore these | |
| 1204 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
| 1205 | |
| 1206 // we ignore global ref to symbols and other internal objects | |
| 1207 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
| 1208 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
| 1209 writer()->write_objectID(o); | |
| 1210 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
| 1211 } | |
| 1212 }; | |
| 1213 | |
| 1214 | |
| 1215 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
| 1216 | |
| 1217 class MonitorUsedDumper : public OopClosure { | |
| 1218 private: | |
| 1219 DumpWriter* _writer; | |
| 1220 DumpWriter* writer() const { return _writer; } | |
| 1221 public: | |
| 1222 MonitorUsedDumper(DumpWriter* writer) { | |
| 1223 _writer = writer; | |
| 1224 } | |
| 1225 void do_oop(oop* obj_p) { | |
| 1226 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
| 1227 writer()->write_objectID(*obj_p); | |
| 1228 } | |
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1229 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1230 }; |
| 1231 | |
| 1232 | |
| 1233 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
| 1234 | |
| 1235 class StickyClassDumper : public OopClosure { | |
| 1236 private: | |
| 1237 DumpWriter* _writer; | |
| 1238 DumpWriter* writer() const { return _writer; } | |
| 1239 public: | |
| 1240 StickyClassDumper(DumpWriter* writer) { | |
| 1241 _writer = writer; | |
| 1242 } | |
| 1243 void do_oop(oop* obj_p); | |
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1244 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1245 }; |
| 1246 | |
| 1247 void StickyClassDumper::do_oop(oop* obj_p) { | |
| 1248 if (*obj_p != NULL) { | |
| 1249 oop o = *obj_p; | |
| 1250 if (o->is_klass()) { | |
| 1251 klassOop k = klassOop(o); | |
| 1252 if (Klass::cast(k)->oop_is_instance()) { | |
| 1253 instanceKlass* ik = instanceKlass::cast(k); | |
| 1254 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); | |
| 1255 writer()->write_classID(ik); | |
| 1256 } | |
| 1257 } | |
| 1258 } | |
| 1259 } | |
| 1260 | |
| 1261 | |
| 1262 class VM_HeapDumper; | |
| 1263 | |
| 1264 // Support class using when iterating over the heap. | |
| 1265 | |
| 1266 class HeapObjectDumper : public ObjectClosure { | |
| 1267 private: | |
| 1268 VM_HeapDumper* _dumper; | |
| 1269 DumpWriter* _writer; | |
| 1270 | |
| 1271 VM_HeapDumper* dumper() { return _dumper; } | |
| 1272 DumpWriter* writer() { return _writer; } | |
| 1273 | |
| 1274 // used to indicate that a record has been writen | |
| 1275 void mark_end_of_record(); | |
| 1276 | |
| 1277 public: | |
| 1278 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
| 1279 _dumper = dumper; | |
| 1280 _writer = writer; | |
| 1281 } | |
| 1282 | |
| 1283 // called for each object in the heap | |
| 1284 void do_object(oop o); | |
| 1285 }; | |
| 1286 | |
| 1287 void HeapObjectDumper::do_object(oop o) { | |
| 1288 // hide the sentinel for deleted handles | |
| 1289 if (o == JNIHandles::deleted_handle()) return; | |
| 1290 | |
| 1291 // ignore KlassKlass objects | |
| 1292 if (o->is_klass()) return; | |
| 1293 | |
| 1294 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
| 1142 | 1295 if (o->klass() == SystemDictionary::Class_klass()) { |
| 0 | 1296 if (!java_lang_Class::is_primitive(o)) { |
| 1297 return; | |
| 1298 } | |
| 1299 } | |
| 1300 | |
| 1301 // create a HPROF_GC_INSTANCE record for each object | |
| 1302 if (o->is_instance()) { | |
| 1303 DumperSupport::dump_instance(writer(), o); | |
| 1304 mark_end_of_record(); | |
| 1305 } else { | |
| 1306 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
| 1307 if (o->is_objArray()) { | |
| 1308 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
| 1309 mark_end_of_record(); | |
| 1310 } else { | |
| 1311 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
| 1312 if (o->is_typeArray()) { | |
| 1313 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
| 1314 mark_end_of_record(); | |
| 1315 } | |
| 1316 } | |
| 1317 } | |
| 1318 } | |
| 1319 | |
| 1320 // The VM operation that performs the heap dump | |
| 1321 class VM_HeapDumper : public VM_GC_Operation { | |
| 1322 private: | |
|
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1323 static VM_HeapDumper* _global_dumper; |
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1324 static DumpWriter* _global_writer; |
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1325 DumpWriter* _local_writer; |
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1326 JavaThread* _oome_thread; |
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1327 methodOop _oome_constructor; |
| 0 | 1328 bool _gc_before_heap_dump; |
| 1329 bool _is_segmented_dump; | |
| 1330 jlong _dump_start; | |
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1331 GrowableArray<Klass*>* _klass_map; |
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1332 ThreadStackTrace** _stack_traces; |
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1333 int _num_threads; |
| 0 | 1334 |
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1335 // accessors and setters |
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1336 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1337 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1338 void set_global_dumper() { |
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1339 assert(_global_dumper == NULL, "Error"); |
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1340 _global_dumper = this; |
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1341 } |
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1342 void set_global_writer() { |
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1343 assert(_global_writer == NULL, "Error"); |
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1344 _global_writer = _local_writer; |
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1345 } |
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1346 void clear_global_dumper() { _global_dumper = NULL; } |
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1347 void clear_global_writer() { _global_writer = NULL; } |
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1348 |
| 0 | 1349 bool is_segmented_dump() const { return _is_segmented_dump; } |
| 1350 void set_segmented_dump() { _is_segmented_dump = true; } | |
| 1351 jlong dump_start() const { return _dump_start; } | |
| 1352 void set_dump_start(jlong pos); | |
| 1353 | |
| 1354 bool skip_operation() const; | |
| 1355 | |
| 1356 // writes a HPROF_LOAD_CLASS record | |
| 1357 static void do_load_class(klassOop k); | |
| 1358 | |
| 1359 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1360 // (and each array class too) | |
| 1361 static void do_class_dump(klassOop k); | |
| 1362 | |
| 1363 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1364 // array (and each multi-dimensional array too) | |
| 1365 static void do_basic_type_array_class_dump(klassOop k); | |
| 1366 | |
| 1367 // HPROF_GC_ROOT_THREAD_OBJ records | |
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1368 int do_thread(JavaThread* thread, u4 thread_serial_num); |
| 0 | 1369 void do_threads(); |
| 1370 | |
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1371 void add_class_serial_number(Klass* k, int serial_num) { |
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1372 _klass_map->at_put_grow(serial_num, k); |
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1373 } |
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1374 |
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1375 // HPROF_TRACE and HPROF_FRAME records |
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1376 void dump_stack_traces(); |
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1377 |
| 0 | 1378 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
| 1379 void write_dump_header(); | |
| 1380 | |
| 1381 // fixes up the length of the current dump record | |
| 1382 void write_current_dump_record_length(); | |
| 1383 | |
| 1384 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1385 // record in the case of a segmented heap dump) | |
| 1386 void end_of_dump(); | |
| 1387 | |
| 1388 public: | |
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1389 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : |
| 0 | 1390 VM_GC_Operation(0 /* total collections, dummy, ignored */, |
| 1391 0 /* total full collections, dummy, ignored */, | |
| 1392 gc_before_heap_dump) { | |
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1393 _local_writer = writer; |
| 0 | 1394 _gc_before_heap_dump = gc_before_heap_dump; |
| 1395 _is_segmented_dump = false; | |
| 1396 _dump_start = (jlong)-1; | |
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1397 _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1398 _stack_traces = NULL; |
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1399 _num_threads = 0; |
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1400 if (oome) { |
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1401 assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); |
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1402 // get OutOfMemoryError zero-parameter constructor |
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1403 instanceKlass* oome_ik = instanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); |
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1404 _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), |
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1405 vmSymbols::void_method_signature()); |
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1406 // get thread throwing OOME when generating the heap dump at OOME |
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1407 _oome_thread = JavaThread::current(); |
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1408 } else { |
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1409 _oome_thread = NULL; |
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1410 _oome_constructor = NULL; |
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1411 } |
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1412 } |
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1413 ~VM_HeapDumper() { |
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1414 if (_stack_traces != NULL) { |
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1415 for (int i=0; i < _num_threads; i++) { |
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1416 delete _stack_traces[i]; |
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1417 } |
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1418 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces); |
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1419 } |
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1420 delete _klass_map; |
| 0 | 1421 } |
| 1422 | |
| 1423 VMOp_Type type() const { return VMOp_HeapDumper; } | |
| 1424 // used to mark sub-record boundary | |
| 1425 void check_segment_length(); | |
| 1426 void doit(); | |
| 1427 }; | |
| 1428 | |
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1429 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1430 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1431 |
| 0 | 1432 bool VM_HeapDumper::skip_operation() const { |
| 1433 return false; | |
| 1434 } | |
| 1435 | |
| 1436 // sets the dump starting position | |
| 1437 void VM_HeapDumper::set_dump_start(jlong pos) { | |
| 1438 _dump_start = pos; | |
| 1439 } | |
| 1440 | |
| 1441 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
| 1442 void VM_HeapDumper::write_dump_header() { | |
| 1443 if (writer()->is_open()) { | |
| 1444 if (is_segmented_dump()) { | |
| 1445 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
| 1446 } else { | |
| 1447 writer()->write_u1(HPROF_HEAP_DUMP); | |
| 1448 } | |
| 1449 writer()->write_u4(0); // current ticks | |
| 1450 | |
| 1451 // record the starting position for the dump (its length will be fixed up later) | |
| 1452 set_dump_start(writer()->current_offset()); | |
| 1453 writer()->write_u4(0); | |
| 1454 } | |
| 1455 } | |
| 1456 | |
| 1457 // fixes up the length of the current dump record | |
| 1458 void VM_HeapDumper::write_current_dump_record_length() { | |
| 1459 if (writer()->is_open()) { | |
| 1460 assert(dump_start() >= 0, "no dump start recorded"); | |
| 1461 | |
| 1462 // calculate the size of the dump record | |
| 1463 jlong dump_end = writer()->current_offset(); | |
| 1464 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1465 | |
| 1466 // record length must fit in a u4 | |
| 1467 if (dump_len > (jlong)(4L*(jlong)G)) { | |
| 1468 warning("record is too large"); | |
| 1469 } | |
| 1470 | |
| 1471 // seek to the dump start and fix-up the length | |
| 1472 writer()->seek_to_offset(dump_start()); | |
| 1473 writer()->write_u4((u4)dump_len); | |
| 1474 | |
| 1475 // adjust the total size written to keep the bytes written correct. | |
| 1476 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
| 1477 | |
| 1478 // seek to dump end so we can continue | |
| 1479 writer()->seek_to_offset(dump_end); | |
| 1480 | |
| 1481 // no current dump record | |
| 1482 set_dump_start((jlong)-1); | |
| 1483 } | |
| 1484 } | |
| 1485 | |
| 1486 // used on a sub-record boundary to check if we need to start a | |
| 1487 // new segment. | |
| 1488 void VM_HeapDumper::check_segment_length() { | |
| 1489 if (writer()->is_open()) { | |
| 1490 if (is_segmented_dump()) { | |
| 1491 // don't use current_offset that would be too expensive on a per record basis | |
| 1492 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
| 1493 assert(dump_end == writer()->current_offset(), "checking"); | |
| 1494 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1495 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
| 1496 | |
| 1497 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
| 1498 write_current_dump_record_length(); | |
| 1499 write_dump_header(); | |
| 1500 } | |
| 1501 } | |
| 1502 } | |
| 1503 } | |
| 1504 | |
| 1505 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1506 // record in the case of a segmented heap dump) | |
| 1507 void VM_HeapDumper::end_of_dump() { | |
| 1508 if (writer()->is_open()) { | |
| 1509 write_current_dump_record_length(); | |
| 1510 | |
| 1511 // for segmented dump we write the end record | |
| 1512 if (is_segmented_dump()) { | |
| 1513 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
| 1514 writer()->write_u4(0); | |
| 1515 writer()->write_u4(0); | |
| 1516 } | |
| 1517 } | |
| 1518 } | |
| 1519 | |
| 1520 // marks sub-record boundary | |
| 1521 void HeapObjectDumper::mark_end_of_record() { | |
| 1522 dumper()->check_segment_length(); | |
| 1523 } | |
| 1524 | |
| 1525 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
| 1526 // array classes) | |
| 1527 void VM_HeapDumper::do_load_class(klassOop k) { | |
| 1528 static u4 class_serial_num = 0; | |
| 1529 | |
| 1530 // len of HPROF_LOAD_CLASS record | |
| 1531 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
| 1532 | |
| 1533 // write a HPROF_LOAD_CLASS for the class and each array class | |
| 1534 do { | |
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1535 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
| 0 | 1536 |
| 1537 // class serial number is just a number | |
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1538 writer()->write_u4(++class_serial_num); |
| 0 | 1539 |
| 1540 // class ID | |
| 1541 Klass* klass = Klass::cast(k); | |
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1542 writer()->write_classID(klass); |
| 0 | 1543 |
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1544 // add the klassOop and class serial number pair |
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1545 dumper()->add_class_serial_number(klass, class_serial_num); |
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1546 |
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1547 writer()->write_u4(STACK_TRACE_ID); |
| 0 | 1548 |
| 1549 // class name ID | |
| 1550 symbolOop name = klass->name(); | |
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1551 writer()->write_objectID(name); |
| 0 | 1552 |
| 1553 // write a LOAD_CLASS record for the array type (if it exists) | |
| 1554 k = klass->array_klass_or_null(); | |
| 1555 } while (k != NULL); | |
| 1556 } | |
| 1557 | |
| 1558 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1559 void VM_HeapDumper::do_class_dump(klassOop k) { | |
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1560 DumperSupport::dump_class_and_array_classes(writer(), k); |
| 0 | 1561 } |
| 1562 | |
| 1563 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1564 // array (and each multi-dimensional array too) | |
| 1565 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { | |
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1566 DumperSupport::dump_basic_type_array_class(writer(), k); |
| 0 | 1567 } |
| 1568 | |
| 1569 // Walk the stack of the given thread. | |
| 1570 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
| 1571 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
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1572 // |
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1573 // It returns the number of Java frames in this thread stack |
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1574 int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
| 0 | 1575 JNILocalsDumper blk(writer(), thread_serial_num); |
| 1576 | |
| 1577 oop threadObj = java_thread->threadObj(); | |
| 1578 assert(threadObj != NULL, "sanity check"); | |
| 1579 | |
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1580 int stack_depth = 0; |
| 0 | 1581 if (java_thread->has_last_Java_frame()) { |
| 1582 | |
| 1583 // vframes are resource allocated | |
| 1584 Thread* current_thread = Thread::current(); | |
| 1585 ResourceMark rm(current_thread); | |
| 1586 HandleMark hm(current_thread); | |
| 1587 | |
| 1588 RegisterMap reg_map(java_thread); | |
| 1589 frame f = java_thread->last_frame(); | |
| 1590 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
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1591 frame* last_entry_frame = NULL; |
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1592 int extra_frames = 0; |
| 0 | 1593 |
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1594 if (java_thread == _oome_thread && _oome_constructor != NULL) { |
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1595 extra_frames++; |
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1596 } |
| 0 | 1597 while (vf != NULL) { |
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1598 blk.set_frame_number(stack_depth); |
| 0 | 1599 if (vf->is_java_frame()) { |
| 1600 | |
| 1601 // java frame (interpreted, compiled, ...) | |
| 1602 javaVFrame *jvf = javaVFrame::cast(vf); | |
| 1603 if (!(jvf->method()->is_native())) { | |
| 1604 StackValueCollection* locals = jvf->locals(); | |
| 1605 for (int slot=0; slot<locals->size(); slot++) { | |
| 1606 if (locals->at(slot)->type() == T_OBJECT) { | |
| 1607 oop o = locals->obj_at(slot)(); | |
| 1608 | |
| 1609 if (o != NULL) { | |
| 1610 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
| 1611 writer()->write_objectID(o); | |
| 1612 writer()->write_u4(thread_serial_num); | |
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1613 writer()->write_u4((u4) (stack_depth + extra_frames)); |
| 0 | 1614 } |
| 1615 } | |
| 1616 } | |
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1617 } else { |
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1618 // native frame |
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1619 if (stack_depth == 0) { |
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1620 // JNI locals for the top frame. |
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1621 java_thread->active_handles()->oops_do(&blk); |
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1622 } else { |
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1623 if (last_entry_frame != NULL) { |
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1624 // JNI locals for the entry frame |
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1625 assert(last_entry_frame->is_entry_frame(), "checking"); |
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1626 last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
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1627 } |
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1628 } |
| 0 | 1629 } |
|
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1630 // increment only for Java frames |
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1631 stack_depth++; |
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1632 last_entry_frame = NULL; |
| 0 | 1633 |
|
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1634 } else { |
| 0 | 1635 // externalVFrame - if it's an entry frame then report any JNI locals |
|
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1636 // as roots when we find the corresponding native javaVFrame |
| 0 | 1637 frame* fr = vf->frame_pointer(); |
| 1638 assert(fr != NULL, "sanity check"); | |
| 1639 if (fr->is_entry_frame()) { | |
|
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1640 last_entry_frame = fr; |
| 0 | 1641 } |
| 1642 } | |
| 1643 vf = vf->sender(); | |
| 1644 } | |
|
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1645 } else { |
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1646 // no last java frame but there may be JNI locals |
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1647 java_thread->active_handles()->oops_do(&blk); |
| 0 | 1648 } |
|
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1649 return stack_depth; |
| 0 | 1650 } |
| 1651 | |
| 1652 | |
| 1653 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
| 1654 // the stack so that locals and JNI locals are dumped. | |
| 1655 void VM_HeapDumper::do_threads() { | |
|
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1656 for (int i=0; i < _num_threads; i++) { |
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1657 JavaThread* thread = _stack_traces[i]->thread(); |
| 0 | 1658 oop threadObj = thread->threadObj(); |
|
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1659 u4 thread_serial_num = i+1; |
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1660 u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
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1661 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
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1662 writer()->write_objectID(threadObj); |
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1663 writer()->write_u4(thread_serial_num); // thread number |
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1664 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1665 int num_frames = do_thread(thread, thread_serial_num); |
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1666 assert(num_frames == _stack_traces[i]->get_stack_depth(), |
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1667 "total number of Java frames not matched"); |
| 0 | 1668 } |
| 1669 } | |
| 1670 | |
| 1671 | |
| 1672 // The VM operation that dumps the heap. The dump consists of the following | |
| 1673 // records: | |
| 1674 // | |
| 1675 // HPROF_HEADER | |
| 1676 // [HPROF_UTF8]* | |
| 1677 // [HPROF_LOAD_CLASS]* | |
|
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1678 // [[HPROF_FRAME]*|HPROF_TRACE]* |
| 0 | 1679 // [HPROF_GC_CLASS_DUMP]* |
| 1680 // HPROF_HEAP_DUMP | |
| 1681 // | |
|
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1682 // The HPROF_TRACE records represent the stack traces where the heap dump |
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1683 // is generated and a "dummy trace" record which does not include |
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1684 // any frames. The dummy trace record is used to be referenced as the |
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1685 // unknown object alloc site. |
| 0 | 1686 // |
| 1687 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
| 1688 // the heap dump be generated in a single pass we remember the position of | |
| 1689 // the dump length and fix it up after all sub-records have been written. | |
| 1690 // To generate the sub-records we iterate over the heap, writing | |
| 1691 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
| 1692 // records as we go. Once that is done we write records for some of the GC | |
| 1693 // roots. | |
| 1694 | |
| 1695 void VM_HeapDumper::doit() { | |
| 1696 | |
| 1697 HandleMark hm; | |
| 1698 CollectedHeap* ch = Universe::heap(); | |
| 1699 if (_gc_before_heap_dump) { | |
| 1700 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
| 1701 } else { | |
| 1702 // make the heap parsable (no need to retire TLABs) | |
| 1703 ch->ensure_parsability(false); | |
| 1704 } | |
| 1705 | |
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1706 // At this point we should be the only dumper active, so |
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1707 // the following should be safe. |
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1708 set_global_dumper(); |
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1709 set_global_writer(); |
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1710 |
| 0 | 1711 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
|
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1712 size_t used = ch->used(); |
| 0 | 1713 const char* header; |
| 1714 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
| 1715 set_segmented_dump(); | |
| 1716 header = "JAVA PROFILE 1.0.2"; | |
| 1717 } else { | |
| 1718 header = "JAVA PROFILE 1.0.1"; | |
| 1719 } | |
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1720 |
| 0 | 1721 // header is few bytes long - no chance to overflow int |
| 1722 writer()->write_raw((void*)header, (int)strlen(header)); | |
| 1723 writer()->write_u1(0); // terminator | |
| 1724 writer()->write_u4(oopSize); | |
| 1725 writer()->write_u8(os::javaTimeMillis()); | |
| 1726 | |
| 1727 // HPROF_UTF8 records | |
| 1728 SymbolTableDumper sym_dumper(writer()); | |
| 1729 SymbolTable::oops_do(&sym_dumper); | |
| 1730 | |
| 1731 // write HPROF_LOAD_CLASS records | |
| 1732 SystemDictionary::classes_do(&do_load_class); | |
| 1733 Universe::basic_type_classes_do(&do_load_class); | |
| 1734 | |
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1735 // write HPROF_FRAME and HPROF_TRACE records |
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1736 // this must be called after _klass_map is built when iterating the classes above. |
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1737 dump_stack_traces(); |
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1738 |
| 0 | 1739 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
| 1740 write_dump_header(); | |
| 1741 | |
| 1742 // Writes HPROF_GC_CLASS_DUMP records | |
| 1743 SystemDictionary::classes_do(&do_class_dump); | |
| 1744 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); | |
| 1745 check_segment_length(); | |
| 1746 | |
| 1747 // writes HPROF_GC_INSTANCE_DUMP records. | |
| 1748 // After each sub-record is written check_segment_length will be invoked. When | |
| 1749 // generated a segmented heap dump this allows us to check if the current | |
| 1750 // segment exceeds a threshold and if so, then a new segment is started. | |
| 1751 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
| 1752 // of the heap dump. | |
| 1753 HeapObjectDumper obj_dumper(this, writer()); | |
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1754 Universe::heap()->safe_object_iterate(&obj_dumper); |
| 0 | 1755 |
| 1756 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
| 1757 do_threads(); | |
| 1758 check_segment_length(); | |
| 1759 | |
| 1760 // HPROF_GC_ROOT_MONITOR_USED | |
| 1761 MonitorUsedDumper mon_dumper(writer()); | |
| 1762 ObjectSynchronizer::oops_do(&mon_dumper); | |
| 1763 check_segment_length(); | |
| 1764 | |
| 1765 // HPROF_GC_ROOT_JNI_GLOBAL | |
| 1766 JNIGlobalsDumper jni_dumper(writer()); | |
| 1767 JNIHandles::oops_do(&jni_dumper); | |
| 1768 check_segment_length(); | |
| 1769 | |
| 1770 // HPROF_GC_ROOT_STICKY_CLASS | |
| 1771 StickyClassDumper class_dumper(writer()); | |
| 1772 SystemDictionary::always_strong_oops_do(&class_dumper); | |
| 1773 | |
| 1774 // fixes up the length of the dump record. In the case of a segmented | |
| 1775 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
| 1776 end_of_dump(); | |
|
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1777 |
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1778 // Now we clear the global variables, so that a future dumper might run. |
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1779 clear_global_dumper(); |
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1780 clear_global_writer(); |
| 0 | 1781 } |
| 1782 | |
|
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1783 void VM_HeapDumper::dump_stack_traces() { |
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1784 // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
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1785 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
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1786 writer()->write_u4((u4) STACK_TRACE_ID); |
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1787 writer()->write_u4(0); // thread number |
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1788 writer()->write_u4(0); // frame count |
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1789 |
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1790 _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads()); |
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1791 int frame_serial_num = 0; |
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1792 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
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1793 oop threadObj = thread->threadObj(); |
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1794 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
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1795 // dump thread stack trace |
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1796 ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
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1797 stack_trace->dump_stack_at_safepoint(-1); |
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1798 _stack_traces[_num_threads++] = stack_trace; |
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1799 |
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1800 // write HPROF_FRAME records for this thread's stack trace |
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1801 int depth = stack_trace->get_stack_depth(); |
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1802 int thread_frame_start = frame_serial_num; |
|
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1803 int extra_frames = 0; |
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1804 // write fake frame that makes it look like the thread, which caused OOME, |
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1805 // is in the OutOfMemoryError zero-parameter constructor |
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1806 if (thread == _oome_thread && _oome_constructor != NULL) { |
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1807 int oome_serial_num = _klass_map->find(Klass::cast(_oome_constructor->method_holder())); |
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1808 // the class serial number starts from 1 |
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1809 assert(oome_serial_num > 0, "OutOfMemoryError class not found"); |
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1810 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, oome_serial_num, |
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1811 _oome_constructor, 0); |
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1812 extra_frames++; |
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1813 } |
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1814 for (int j=0; j < depth; j++) { |
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1815 StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
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1816 methodOop m = frame->method(); |
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1817 int class_serial_num = _klass_map->find(Klass::cast(m->method_holder())); |
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1818 // the class serial number starts from 1 |
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1819 assert(class_serial_num > 0, "class not found"); |
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1820 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
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1821 } |
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1822 depth += extra_frames; |
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1823 |
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1824 // write HPROF_TRACE record for one thread |
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1825 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
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1826 int stack_serial_num = _num_threads + STACK_TRACE_ID; |
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1827 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1828 writer()->write_u4((u4) _num_threads); // thread serial number |
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1829 writer()->write_u4(depth); // frame count |
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1830 for (int j=1; j <= depth; j++) { |
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1831 writer()->write_id(thread_frame_start + j); |
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1832 } |
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1833 } |
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1834 } |
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1835 } |
| 0 | 1836 |
| 1837 // dump the heap to given path. | |
| 1838 int HeapDumper::dump(const char* path) { | |
| 1839 assert(path != NULL && strlen(path) > 0, "path missing"); | |
| 1840 | |
| 1841 // print message in interactive case | |
| 1842 if (print_to_tty()) { | |
| 1843 tty->print_cr("Dumping heap to %s ...", path); | |
| 1844 timer()->start(); | |
| 1845 } | |
| 1846 | |
| 1847 // create the dump writer. If the file can be opened then bail | |
| 1848 DumpWriter writer(path); | |
| 1849 if (!writer.is_open()) { | |
| 1850 set_error(writer.error()); | |
| 1851 if (print_to_tty()) { | |
| 1852 tty->print_cr("Unable to create %s: %s", path, | |
| 1853 (error() != NULL) ? error() : "reason unknown"); | |
| 1854 } | |
| 1855 return -1; | |
| 1856 } | |
| 1857 | |
| 1858 // generate the dump | |
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1859 VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); |
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1860 if (Thread::current()->is_VM_thread()) { |
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1861 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1862 dumper.doit(); |
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1863 } else { |
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1864 VMThread::execute(&dumper); |
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1865 } |
| 0 | 1866 |
| 1867 // close dump file and record any error that the writer may have encountered | |
| 1868 writer.close(); | |
| 1869 set_error(writer.error()); | |
| 1870 | |
| 1871 // print message in interactive case | |
| 1872 if (print_to_tty()) { | |
| 1873 timer()->stop(); | |
| 1874 if (error() == NULL) { | |
| 1875 char msg[256]; | |
| 1876 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
| 1877 os::jlong_format_specifier(), timer()->seconds()); | |
| 1878 tty->print_cr(msg, writer.bytes_written()); | |
| 1879 } else { | |
| 1880 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
| 1881 } | |
| 1882 } | |
| 1883 | |
| 1884 return (writer.error() == NULL) ? 0 : -1; | |
| 1885 } | |
| 1886 | |
| 1887 // stop timer (if still active), and free any error string we might be holding | |
| 1888 HeapDumper::~HeapDumper() { | |
| 1889 if (timer()->is_active()) { | |
| 1890 timer()->stop(); | |
| 1891 } | |
| 1892 set_error(NULL); | |
| 1893 } | |
| 1894 | |
| 1895 | |
| 1896 // returns the error string (resource allocated), or NULL | |
| 1897 char* HeapDumper::error_as_C_string() const { | |
| 1898 if (error() != NULL) { | |
| 1899 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
| 1900 strcpy(str, error()); | |
| 1901 return str; | |
| 1902 } else { | |
| 1903 return NULL; | |
| 1904 } | |
| 1905 } | |
| 1906 | |
| 1907 // set the error string | |
| 1908 void HeapDumper::set_error(char* error) { | |
| 1909 if (_error != NULL) { | |
| 1910 os::free(_error); | |
| 1911 } | |
| 1912 if (error == NULL) { | |
| 1913 _error = NULL; | |
| 1914 } else { | |
| 1915 _error = os::strdup(error); | |
| 1916 assert(_error != NULL, "allocation failure"); | |
| 1917 } | |
| 1918 } | |
| 1919 | |
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1920 // Called by out-of-memory error reporting by a single Java thread |
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1921 // outside of a JVM safepoint |
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1922 void HeapDumper::dump_heap_from_oome() { |
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1923 HeapDumper::dump_heap(true); |
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1924 } |
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1925 |
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1926 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1927 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1928 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1929 // general use, however, this method will need modification to prevent |
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1930 // inteference when updating the static variables base_path and dump_file_seq below. |
| 0 | 1931 void HeapDumper::dump_heap() { |
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1932 HeapDumper::dump_heap(false); |
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1933 } |
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1934 |
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1935 void HeapDumper::dump_heap(bool oome) { |
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1936 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1937 static uint dump_file_seq = 0; |
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1938 char my_path[JVM_MAXPATHLEN] = {'\0'}; |
| 0 | 1939 |
| 1940 // The dump file defaults to java_pid<pid>.hprof in the current working | |
| 1941 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
| 1942 // dump file name or a directory where dump file is created. | |
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1943 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1944 bool use_default_filename = true; |
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1945 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1946 // HeapDumpPath=<file> not specified |
| 0 | 1947 } else { |
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1948 assert(strlen(HeapDumpPath) < sizeof(base_path), "HeapDumpPath too long"); |
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1949 strcpy(base_path, HeapDumpPath); |
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1950 // check if the path is a directory (must exist) |
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1951 DIR* dir = os::opendir(base_path); |
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1952 if (dir == NULL) { |
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1953 use_default_filename = false; |
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1954 } else { |
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1955 // HeapDumpPath specified a directory. We append a file separator |
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1956 // (if needed). |
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1957 os::closedir(dir); |
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1958 size_t fs_len = strlen(os::file_separator()); |
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1959 if (strlen(base_path) >= fs_len) { |
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1960 char* end = base_path; |
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1961 end += (strlen(base_path) - fs_len); |
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1962 if (strcmp(end, os::file_separator()) != 0) { |
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1963 assert(strlen(base_path) + strlen(os::file_separator()) < sizeof(base_path), |
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1964 "HeapDumpPath too long"); |
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1965 strcat(base_path, os::file_separator()); |
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1966 } |
| 0 | 1967 } |
| 1968 } | |
| 1969 } | |
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1970 // If HeapDumpPath wasn't a file name then we append the default name |
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1971 if (use_default_filename) { |
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1972 char fn[32]; |
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1973 sprintf(fn, "java_pid%d", os::current_process_id()); |
| 1046 | 1974 assert(strlen(base_path) + strlen(fn) + strlen(".hprof") < sizeof(base_path), "HeapDumpPath too long"); |
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1975 strcat(base_path, fn); |
| 1046 | 1976 strcat(base_path, ".hprof"); |
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1977 } |
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1978 assert(strlen(base_path) < sizeof(my_path), "Buffer too small"); |
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1979 strcpy(my_path, base_path); |
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1980 } else { |
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1981 // Append a sequence number id for dumps following the first |
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1982 char fn[33]; |
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1983 sprintf(fn, ".%d", dump_file_seq); |
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1984 assert(strlen(base_path) + strlen(fn) < sizeof(my_path), "HeapDumpPath too long"); |
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c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
517
diff
changeset
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1985 strcpy(my_path, base_path); |
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c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
517
diff
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1986 strcat(my_path, fn); |
| 0 | 1987 } |
|
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
517
diff
changeset
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1988 dump_file_seq++; // increment seq number for next time we dump |
| 0 | 1989 |
| 1990 HeapDumper dumper(false /* no GC before heap dump */, | |
|
1775
30f67acf635d
6765718: Indicate which thread throwing OOME when generating the heap dump at OOME
thurka
parents:
1552
diff
changeset
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1991 true /* send to tty */, |
|
30f67acf635d
6765718: Indicate which thread throwing OOME when generating the heap dump at OOME
thurka
parents:
1552
diff
changeset
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1992 oome /* pass along out-of-memory-error flag */); |
|
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
517
diff
changeset
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1993 dumper.dump(my_path); |
| 0 | 1994 } |