Mercurial > hg > truffle
annotate src/share/vm/services/heapDumper.cpp @ 2377:57552dca1708
7029509: nightly failures after static fields in Class
Reviewed-by: kvn
| author | never |
|---|---|
| date | Mon, 21 Mar 2011 14:06:50 -0700 |
| parents | c798c277ddd1 |
| children | 167b70ff3abc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2225 | 2 * Copyright (c) 2005, 2011, 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); | |
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428 void write_symbolID(Symbol* o); |
| 0 | 429 void write_classID(Klass* k); |
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430 void write_id(u4 x); |
| 0 | 431 }; |
| 432 | |
| 433 DumpWriter::DumpWriter(const char* path) { | |
| 434 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
| 435 // sufficient memory then reduce size until we can allocate something. | |
| 436 _size = io_buffer_size; | |
| 437 do { | |
| 438 _buffer = (char*)os::malloc(_size); | |
| 439 if (_buffer == NULL) { | |
| 440 _size = _size >> 1; | |
| 441 } | |
| 442 } while (_buffer == NULL && _size > 0); | |
| 443 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
| 444 _pos = 0; | |
| 445 _error = NULL; | |
| 446 _bytes_written = 0L; | |
| 447 _fd = os::create_binary_file(path, false); // don't replace existing file | |
| 448 | |
| 449 // if the open failed we record the error | |
| 450 if (_fd < 0) { | |
| 451 _error = (char*)os::strdup(strerror(errno)); | |
| 452 } | |
| 453 } | |
| 454 | |
| 455 DumpWriter::~DumpWriter() { | |
| 456 // flush and close dump file | |
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457 if (is_open()) { |
| 0 | 458 close(); |
| 459 } | |
| 460 if (_buffer != NULL) os::free(_buffer); | |
| 461 if (_error != NULL) os::free(_error); | |
| 462 } | |
| 463 | |
| 464 // closes dump file (if open) | |
| 465 void DumpWriter::close() { | |
| 466 // flush and close dump file | |
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467 if (is_open()) { |
| 0 | 468 flush(); |
| 469 ::close(file_descriptor()); | |
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470 set_file_descriptor(-1); |
| 0 | 471 } |
| 472 } | |
| 473 | |
| 474 // write directly to the file | |
| 475 void DumpWriter::write_internal(void* s, int len) { | |
| 476 if (is_open()) { | |
| 477 int n = ::write(file_descriptor(), s, len); | |
| 478 if (n > 0) { | |
| 479 _bytes_written += n; | |
| 480 } | |
| 481 if (n != len) { | |
| 482 if (n < 0) { | |
| 483 set_error(strerror(errno)); | |
| 484 } else { | |
| 485 set_error("file size limit"); | |
| 486 } | |
| 487 ::close(file_descriptor()); | |
| 488 set_file_descriptor(-1); | |
| 489 } | |
| 490 } | |
| 491 } | |
| 492 | |
| 493 // write raw bytes | |
| 494 void DumpWriter::write_raw(void* s, int len) { | |
| 495 if (is_open()) { | |
| 496 // flush buffer to make toom | |
| 497 if ((position()+ len) >= buffer_size()) { | |
| 498 flush(); | |
| 499 } | |
| 500 | |
| 501 // buffer not available or too big to buffer it | |
| 502 if ((buffer() == NULL) || (len >= buffer_size())) { | |
| 503 write_internal(s, len); | |
| 504 } else { | |
| 505 // Should optimize this for u1/u2/u4/u8 sizes. | |
| 506 memcpy(buffer() + position(), s, len); | |
| 507 set_position(position() + len); | |
| 508 } | |
| 509 } | |
| 510 } | |
| 511 | |
| 512 // flush any buffered bytes to the file | |
| 513 void DumpWriter::flush() { | |
| 514 if (is_open() && position() > 0) { | |
| 515 write_internal(buffer(), position()); | |
| 516 set_position(0); | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 | |
| 521 jlong DumpWriter::current_offset() { | |
| 522 if (is_open()) { | |
| 523 // the offset is the file offset plus whatever we have buffered | |
| 524 jlong offset = os::current_file_offset(file_descriptor()); | |
| 525 assert(offset >= 0, "lseek failed"); | |
| 526 return offset + (jlong)position(); | |
| 527 } else { | |
| 528 return (jlong)-1; | |
| 529 } | |
| 530 } | |
| 531 | |
| 532 void DumpWriter::seek_to_offset(jlong off) { | |
| 533 assert(off >= 0, "bad offset"); | |
| 534 | |
| 535 // need to flush before seeking | |
| 536 flush(); | |
| 537 | |
| 538 // may be closed due to I/O error | |
| 539 if (is_open()) { | |
| 540 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
| 541 assert(n >= 0, "lseek failed"); | |
| 542 } | |
| 543 } | |
| 544 | |
| 545 void DumpWriter::write_u2(u2 x) { | |
| 546 u2 v; | |
| 547 Bytes::put_Java_u2((address)&v, x); | |
| 548 write_raw((void*)&v, 2); | |
| 549 } | |
| 550 | |
| 551 void DumpWriter::write_u4(u4 x) { | |
| 552 u4 v; | |
| 553 Bytes::put_Java_u4((address)&v, x); | |
| 554 write_raw((void*)&v, 4); | |
| 555 } | |
| 556 | |
| 557 void DumpWriter::write_u8(u8 x) { | |
| 558 u8 v; | |
| 559 Bytes::put_Java_u8((address)&v, x); | |
| 560 write_raw((void*)&v, 8); | |
| 561 } | |
| 562 | |
| 563 void DumpWriter::write_objectID(oop o) { | |
| 564 address a = (address)((uintptr_t)o); | |
| 565 #ifdef _LP64 | |
| 566 write_u8((u8)a); | |
| 567 #else | |
| 568 write_u4((u4)a); | |
| 569 #endif | |
| 570 } | |
| 571 | |
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572 void DumpWriter::write_symbolID(Symbol* s) { |
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573 address a = (address)((uintptr_t)s); |
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574 #ifdef _LP64 |
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575 write_u8((u8)a); |
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576 #else |
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577 write_u4((u4)a); |
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578 #endif |
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579 } |
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580 |
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581 void DumpWriter::write_id(u4 x) { |
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582 #ifdef _LP64 |
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583 write_u8((u8) x); |
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584 #else |
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585 write_u4(x); |
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586 #endif |
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587 } |
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588 |
| 0 | 589 // We use java mirror as the class ID |
| 590 void DumpWriter::write_classID(Klass* k) { | |
| 591 write_objectID(k->java_mirror()); | |
| 592 } | |
| 593 | |
| 594 | |
| 595 | |
| 596 // Support class with a collection of functions used when dumping the heap | |
| 597 | |
| 598 class DumperSupport : AllStatic { | |
| 599 public: | |
| 600 | |
| 601 // write a header of the given type | |
| 602 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
| 603 | |
| 604 // returns hprof tag for the given type signature | |
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605 static hprofTag sig2tag(Symbol* sig); |
| 0 | 606 // returns hprof tag for the given basic type |
| 607 static hprofTag type2tag(BasicType type); | |
| 608 | |
| 609 // returns the size of the instance of the given class | |
| 610 static u4 instance_size(klassOop k); | |
| 611 | |
| 612 // dump a jfloat | |
| 613 static void dump_float(DumpWriter* writer, jfloat f); | |
| 614 // dump a jdouble | |
| 615 static void dump_double(DumpWriter* writer, jdouble d); | |
| 616 // dumps the raw value of the given field | |
| 617 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
| 618 // dumps static fields of the given class | |
| 619 static void dump_static_fields(DumpWriter* writer, klassOop k); | |
| 620 // dump the raw values of the instance fields of the given object | |
| 621 static void dump_instance_fields(DumpWriter* writer, oop o); | |
| 622 // dumps the definition of the instance fields for a given class | |
| 623 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); | |
| 624 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 625 static void dump_instance(DumpWriter* writer, oop o); | |
| 626 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
| 627 // array classes | |
| 628 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); | |
| 629 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 630 // class (and each multi-dimensional array class too) | |
| 631 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); | |
| 632 | |
| 633 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 634 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
| 635 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 636 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
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637 // create HPROF_FRAME record for the given method and bci |
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638 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, methodOop m, int bci); |
| 0 | 639 }; |
| 640 | |
| 641 // write a header of the given type | |
| 642 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
| 643 writer->write_u1((u1)tag); | |
| 644 writer->write_u4(0); // current ticks | |
| 645 writer->write_u4(len); | |
| 646 } | |
| 647 | |
| 648 // returns hprof tag for the given type signature | |
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649 hprofTag DumperSupport::sig2tag(Symbol* sig) { |
| 0 | 650 switch (sig->byte_at(0)) { |
| 651 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
| 652 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
| 653 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
| 654 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
| 655 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
| 656 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
| 657 case JVM_SIGNATURE_INT : return HPROF_INT; | |
| 658 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
| 659 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
| 660 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
| 661 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 662 } | |
| 663 } | |
| 664 | |
| 665 hprofTag DumperSupport::type2tag(BasicType type) { | |
| 666 switch (type) { | |
| 667 case T_BYTE : return HPROF_BYTE; | |
| 668 case T_CHAR : return HPROF_CHAR; | |
| 669 case T_FLOAT : return HPROF_FLOAT; | |
| 670 case T_DOUBLE : return HPROF_DOUBLE; | |
| 671 case T_INT : return HPROF_INT; | |
| 672 case T_LONG : return HPROF_LONG; | |
| 673 case T_SHORT : return HPROF_SHORT; | |
| 674 case T_BOOLEAN : return HPROF_BOOLEAN; | |
| 675 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 676 } | |
| 677 } | |
| 678 | |
| 679 // dump a jfloat | |
| 680 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
| 681 if (g_isnan(f)) { | |
| 682 writer->write_u4(0x7fc00000); // collapsing NaNs | |
| 683 } else { | |
| 684 union { | |
| 685 int i; | |
| 686 float f; | |
| 687 } u; | |
| 688 u.f = (float)f; | |
| 689 writer->write_u4((u4)u.i); | |
| 690 } | |
| 691 } | |
| 692 | |
| 693 // dump a jdouble | |
| 694 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
| 695 union { | |
| 696 jlong l; | |
| 697 double d; | |
| 698 } u; | |
| 699 if (g_isnan(d)) { // collapsing NaNs | |
| 700 u.l = (jlong)(0x7ff80000); | |
| 701 u.l = (u.l << 32); | |
| 702 } else { | |
| 703 u.d = (double)d; | |
| 704 } | |
| 705 writer->write_u8((u8)u.l); | |
| 706 } | |
| 707 | |
| 708 // dumps the raw value of the given field | |
| 709 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
| 710 switch (type) { | |
| 711 case JVM_SIGNATURE_CLASS : | |
| 712 case JVM_SIGNATURE_ARRAY : { | |
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713 oop o; |
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714 if (UseCompressedOops) { |
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715 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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716 } else { |
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717 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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718 } |
| 0 | 719 |
| 720 // reflection and sun.misc.Unsafe classes may have a reference to a | |
| 721 // klassOop so filter it out. | |
| 722 if (o != NULL && o->is_klass()) { | |
| 723 o = NULL; | |
| 724 } | |
| 725 | |
| 726 // FIXME: When sharing is enabled we don't emit field references to objects | |
| 727 // in shared spaces. We can remove this once we write records for the classes | |
| 728 // and strings that are shared. | |
| 729 if (o != NULL && o->is_shared()) { | |
| 730 o = NULL; | |
| 731 } | |
| 732 writer->write_objectID(o); | |
| 733 break; | |
| 734 } | |
| 735 case JVM_SIGNATURE_BYTE : { | |
| 736 jbyte* b = (jbyte*)addr; | |
| 737 writer->write_u1((u1)*b); | |
| 738 break; | |
| 739 } | |
| 740 case JVM_SIGNATURE_CHAR : { | |
| 741 jchar* c = (jchar*)addr; | |
| 742 writer->write_u2((u2)*c); | |
| 743 break; | |
| 744 } | |
| 745 case JVM_SIGNATURE_SHORT : { | |
| 746 jshort* s = (jshort*)addr; | |
| 747 writer->write_u2((u2)*s); | |
| 748 break; | |
| 749 } | |
| 750 case JVM_SIGNATURE_FLOAT : { | |
| 751 jfloat* f = (jfloat*)addr; | |
| 752 dump_float(writer, *f); | |
| 753 break; | |
| 754 } | |
| 755 case JVM_SIGNATURE_DOUBLE : { | |
| 756 jdouble* f = (jdouble*)addr; | |
| 757 dump_double(writer, *f); | |
| 758 break; | |
| 759 } | |
| 760 case JVM_SIGNATURE_INT : { | |
| 761 jint* i = (jint*)addr; | |
| 762 writer->write_u4((u4)*i); | |
| 763 break; | |
| 764 } | |
| 765 case JVM_SIGNATURE_LONG : { | |
| 766 jlong* l = (jlong*)addr; | |
| 767 writer->write_u8((u8)*l); | |
| 768 break; | |
| 769 } | |
| 770 case JVM_SIGNATURE_BOOLEAN : { | |
| 771 jboolean* b = (jboolean*)addr; | |
| 772 writer->write_u1((u1)*b); | |
| 773 break; | |
| 774 } | |
| 775 default : ShouldNotReachHere(); | |
| 776 } | |
| 777 } | |
| 778 | |
| 779 // returns the size of the instance of the given class | |
| 780 u4 DumperSupport::instance_size(klassOop k) { | |
| 781 HandleMark hm; | |
| 782 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 783 | |
| 784 int size = 0; | |
| 785 | |
| 786 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 787 if (!fld.access_flags().is_static()) { | |
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788 Symbol* sig = fld.signature(); |
| 0 | 789 switch (sig->byte_at(0)) { |
| 790 case JVM_SIGNATURE_CLASS : | |
| 791 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
| 792 | |
| 793 case JVM_SIGNATURE_BYTE : | |
| 794 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
| 795 | |
| 796 case JVM_SIGNATURE_CHAR : | |
| 797 case JVM_SIGNATURE_SHORT : size += 2; break; | |
| 798 | |
| 799 case JVM_SIGNATURE_INT : | |
| 800 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
| 801 | |
| 802 case JVM_SIGNATURE_LONG : | |
| 803 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
| 804 | |
| 805 default : ShouldNotReachHere(); | |
| 806 } | |
| 807 } | |
| 808 } | |
| 809 return (u4)size; | |
| 810 } | |
| 811 | |
| 812 // dumps static fields of the given class | |
| 813 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { | |
| 814 HandleMark hm; | |
| 815 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 816 | |
| 817 // pass 1 - count the static fields | |
| 818 u2 field_count = 0; | |
| 819 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 820 if (fldc.access_flags().is_static()) field_count++; | |
| 821 } | |
| 822 | |
| 823 writer->write_u2(field_count); | |
| 824 | |
| 825 // pass 2 - dump the field descriptors and raw values | |
| 826 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 827 if (fld.access_flags().is_static()) { | |
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828 Symbol* sig = fld.signature(); |
| 0 | 829 |
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830 writer->write_symbolID(fld.name()); // name |
| 0 | 831 writer->write_u1(sig2tag(sig)); // type |
| 832 | |
| 833 // value | |
| 834 int offset = fld.offset(); | |
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835 address addr = (address)ikh->java_mirror() + offset; |
| 0 | 836 |
| 837 dump_field_value(writer, sig->byte_at(0), addr); | |
| 838 } | |
| 839 } | |
| 840 } | |
| 841 | |
| 842 // dump the raw values of the instance fields of the given object | |
| 843 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
| 844 HandleMark hm; | |
| 845 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
| 846 | |
| 847 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 848 if (!fld.access_flags().is_static()) { | |
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849 Symbol* sig = fld.signature(); |
| 0 | 850 address addr = (address)o + fld.offset(); |
| 851 | |
| 852 dump_field_value(writer, sig->byte_at(0), addr); | |
| 853 } | |
| 854 } | |
| 855 } | |
| 856 | |
| 857 // dumps the definition of the instance fields for a given class | |
| 858 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { | |
| 859 HandleMark hm; | |
| 860 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 861 | |
| 862 // pass 1 - count the instance fields | |
| 863 u2 field_count = 0; | |
| 864 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 865 if (!fldc.access_flags().is_static()) field_count++; | |
| 866 } | |
| 867 | |
| 868 writer->write_u2(field_count); | |
| 869 | |
| 870 // pass 2 - dump the field descriptors | |
| 871 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 872 if (!fld.access_flags().is_static()) { | |
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873 Symbol* sig = fld.signature(); |
| 0 | 874 |
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875 writer->write_symbolID(fld.name()); // name |
| 0 | 876 writer->write_u1(sig2tag(sig)); // type |
| 877 } | |
| 878 } | |
| 879 } | |
| 880 | |
| 881 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 882 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
| 883 klassOop k = o->klass(); | |
| 884 | |
| 885 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
| 886 writer->write_objectID(o); | |
| 887 writer->write_u4(STACK_TRACE_ID); | |
| 888 | |
| 889 // class ID | |
| 890 writer->write_classID(Klass::cast(k)); | |
| 891 | |
| 892 // number of bytes that follow | |
| 893 writer->write_u4(instance_size(k) ); | |
| 894 | |
| 895 // field values | |
| 896 dump_instance_fields(writer, o); | |
| 897 } | |
| 898 | |
| 899 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
| 900 // its array classes | |
| 901 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { | |
| 902 Klass* klass = Klass::cast(k); | |
| 903 assert(klass->oop_is_instance(), "not an instanceKlass"); | |
| 904 instanceKlass* ik = (instanceKlass*)klass; | |
| 905 | |
| 906 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 907 | |
| 908 // class ID | |
| 909 writer->write_classID(ik); | |
| 910 writer->write_u4(STACK_TRACE_ID); | |
| 911 | |
| 912 // super class ID | |
| 913 klassOop java_super = ik->java_super(); | |
| 914 if (java_super == NULL) { | |
| 915 writer->write_objectID(NULL); | |
| 916 } else { | |
| 917 writer->write_classID(Klass::cast(java_super)); | |
| 918 } | |
| 919 | |
| 920 writer->write_objectID(ik->class_loader()); | |
| 921 writer->write_objectID(ik->signers()); | |
| 922 writer->write_objectID(ik->protection_domain()); | |
| 923 | |
| 924 // reserved | |
| 925 writer->write_objectID(NULL); | |
| 926 writer->write_objectID(NULL); | |
| 927 | |
| 928 // instance size | |
| 929 writer->write_u4(DumperSupport::instance_size(k)); | |
| 930 | |
| 931 // size of constant pool - ignored by HAT 1.1 | |
| 932 writer->write_u2(0); | |
| 933 | |
| 934 // number of static fields | |
| 935 dump_static_fields(writer, k); | |
| 936 | |
| 937 // description of instance fields | |
| 938 dump_instance_field_descriptors(writer, k); | |
| 939 | |
| 940 // array classes | |
| 941 k = klass->array_klass_or_null(); | |
| 942 while (k != NULL) { | |
| 943 Klass* klass = Klass::cast(k); | |
| 944 assert(klass->oop_is_objArray(), "not an objArrayKlass"); | |
| 945 | |
| 946 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 947 writer->write_classID(klass); | |
| 948 writer->write_u4(STACK_TRACE_ID); | |
| 949 | |
| 950 // super class of array classes is java.lang.Object | |
| 951 java_super = klass->java_super(); | |
| 952 assert(java_super != NULL, "checking"); | |
| 953 writer->write_classID(Klass::cast(java_super)); | |
| 954 | |
| 955 writer->write_objectID(ik->class_loader()); | |
| 956 writer->write_objectID(ik->signers()); | |
| 957 writer->write_objectID(ik->protection_domain()); | |
| 958 | |
| 959 writer->write_objectID(NULL); // reserved | |
| 960 writer->write_objectID(NULL); | |
| 961 writer->write_u4(0); // instance size | |
| 962 writer->write_u2(0); // constant pool | |
| 963 writer->write_u2(0); // static fields | |
| 964 writer->write_u2(0); // instance fields | |
| 965 | |
| 966 // get the array class for the next rank | |
| 967 k = klass->array_klass_or_null(); | |
| 968 } | |
| 969 } | |
| 970 | |
| 971 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 972 // class (and each multi-dimensional array class too) | |
| 973 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { | |
| 974 // array classes | |
| 975 while (k != NULL) { | |
| 976 Klass* klass = Klass::cast(k); | |
| 977 | |
| 978 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 979 writer->write_classID(klass); | |
| 980 writer->write_u4(STACK_TRACE_ID); | |
| 981 | |
| 982 // super class of array classes is java.lang.Object | |
| 983 klassOop java_super = klass->java_super(); | |
| 984 assert(java_super != NULL, "checking"); | |
| 985 writer->write_classID(Klass::cast(java_super)); | |
| 986 | |
| 987 writer->write_objectID(NULL); // loader | |
| 988 writer->write_objectID(NULL); // signers | |
| 989 writer->write_objectID(NULL); // protection domain | |
| 990 | |
| 991 writer->write_objectID(NULL); // reserved | |
| 992 writer->write_objectID(NULL); | |
| 993 writer->write_u4(0); // instance size | |
| 994 writer->write_u2(0); // constant pool | |
| 995 writer->write_u2(0); // static fields | |
| 996 writer->write_u2(0); // instance fields | |
| 997 | |
| 998 // get the array class for the next rank | |
| 999 k = klass->array_klass_or_null(); | |
| 1000 } | |
| 1001 } | |
| 1002 | |
| 1003 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 1004 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
| 1005 | |
| 1006 // filter this | |
| 1007 if (array->klass() == Universe::systemObjArrayKlassObj()) return; | |
| 1008 | |
| 1009 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
| 1010 writer->write_objectID(array); | |
| 1011 writer->write_u4(STACK_TRACE_ID); | |
| 1012 writer->write_u4((u4)array->length()); | |
| 1013 | |
| 1014 // array class ID | |
| 1015 writer->write_classID(Klass::cast(array->klass())); | |
| 1016 | |
| 1017 // [id]* elements | |
| 1018 for (int index=0; index<array->length(); index++) { | |
| 1019 oop o = array->obj_at(index); | |
| 1020 writer->write_objectID(o); | |
| 1021 } | |
| 1022 } | |
| 1023 | |
| 1024 #define WRITE_ARRAY(Array, Type, Size) \ | |
| 1025 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
| 1026 | |
| 1027 | |
| 1028 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 1029 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
| 1030 BasicType type = typeArrayKlass::cast(array->klass())->element_type(); | |
| 1031 | |
| 1032 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
| 1033 writer->write_objectID(array); | |
| 1034 writer->write_u4(STACK_TRACE_ID); | |
| 1035 writer->write_u4((u4)array->length()); | |
| 1036 writer->write_u1(type2tag(type)); | |
| 1037 | |
| 1038 // nothing to copy | |
| 1039 if (array->length() == 0) { | |
| 1040 return; | |
| 1041 } | |
| 1042 | |
| 1043 // If the byte ordering is big endian then we can copy most types directly | |
|
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1044 int length_in_bytes = array->length() * type2aelembytes(type); |
| 0 | 1045 assert(length_in_bytes > 0, "nothing to copy"); |
| 1046 | |
| 1047 switch (type) { | |
| 1048 case T_INT : { | |
| 1049 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1050 WRITE_ARRAY(array, int, u4); | |
| 1051 } else { | |
| 1052 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
| 1053 } | |
| 1054 break; | |
| 1055 } | |
| 1056 case T_BYTE : { | |
| 1057 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
| 1058 break; | |
| 1059 } | |
| 1060 case T_CHAR : { | |
| 1061 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1062 WRITE_ARRAY(array, char, u2); | |
| 1063 } else { | |
| 1064 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
| 1065 } | |
| 1066 break; | |
| 1067 } | |
| 1068 case T_SHORT : { | |
| 1069 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1070 WRITE_ARRAY(array, short, u2); | |
| 1071 } else { | |
| 1072 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
| 1073 } | |
| 1074 break; | |
| 1075 } | |
| 1076 case T_BOOLEAN : { | |
| 1077 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1078 WRITE_ARRAY(array, bool, u1); | |
| 1079 } else { | |
| 1080 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
| 1081 } | |
| 1082 break; | |
| 1083 } | |
| 1084 case T_LONG : { | |
| 1085 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1086 WRITE_ARRAY(array, long, u8); | |
| 1087 } else { | |
| 1088 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
| 1089 } | |
| 1090 break; | |
| 1091 } | |
| 1092 | |
| 1093 // handle float/doubles in a special value to ensure than NaNs are | |
| 1094 // written correctly. TO DO: Check if we can avoid this on processors that | |
| 1095 // use IEEE 754. | |
| 1096 | |
| 1097 case T_FLOAT : { | |
| 1098 for (int i=0; i<array->length(); i++) { | |
| 1099 dump_float( writer, array->float_at(i) ); | |
| 1100 } | |
| 1101 break; | |
| 1102 } | |
| 1103 case T_DOUBLE : { | |
| 1104 for (int i=0; i<array->length(); i++) { | |
| 1105 dump_double( writer, array->double_at(i) ); | |
| 1106 } | |
| 1107 break; | |
| 1108 } | |
| 1109 default : ShouldNotReachHere(); | |
| 1110 } | |
| 1111 } | |
| 1112 | |
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1113 // create a HPROF_FRAME record of the given methodOop and bci |
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1114 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1115 int frame_serial_num, |
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1116 int class_serial_num, |
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1117 methodOop m, |
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1118 int bci) { |
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1119 int line_number; |
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1120 if (m->is_native()) { |
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1121 line_number = -3; // native frame |
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1122 } else { |
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1123 line_number = m->line_number_from_bci(bci); |
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1124 } |
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1125 |
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1126 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1127 writer->write_id(frame_serial_num); // frame serial number |
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1128 writer->write_symbolID(m->name()); // method's name |
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1129 writer->write_symbolID(m->signature()); // method's signature |
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1130 |
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1131 assert(Klass::cast(m->method_holder())->oop_is_instance(), "not instanceKlass"); |
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1132 writer->write_symbolID(instanceKlass::cast(m->method_holder())->source_file_name()); // source file name |
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1133 writer->write_u4(class_serial_num); // class serial number |
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1134 writer->write_u4((u4) line_number); // line number |
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1135 } |
| 0 | 1136 |
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1137 |
| 0 | 1138 // Support class used to generate HPROF_UTF8 records from the entries in the |
| 1139 // SymbolTable. | |
| 1140 | |
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1141 class SymbolTableDumper : public SymbolClosure { |
| 0 | 1142 private: |
| 1143 DumpWriter* _writer; | |
| 1144 DumpWriter* writer() const { return _writer; } | |
| 1145 public: | |
| 1146 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
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1147 void do_symbol(Symbol** p); |
| 0 | 1148 }; |
| 1149 | |
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1150 void SymbolTableDumper::do_symbol(Symbol** p) { |
| 0 | 1151 ResourceMark rm; |
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1152 Symbol* sym = load_symbol(p); |
| 0 | 1153 int len = sym->utf8_length(); |
| 1154 if (len > 0) { | |
| 1155 char* s = sym->as_utf8(); | |
| 1156 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
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1157 writer()->write_symbolID(sym); |
| 0 | 1158 writer()->write_raw(s, len); |
| 1159 } | |
| 1160 } | |
| 1161 | |
| 1162 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
| 1163 | |
| 1164 class JNILocalsDumper : public OopClosure { | |
| 1165 private: | |
| 1166 DumpWriter* _writer; | |
| 1167 u4 _thread_serial_num; | |
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1168 int _frame_num; |
| 0 | 1169 DumpWriter* writer() const { return _writer; } |
| 1170 public: | |
| 1171 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
| 1172 _writer = writer; | |
| 1173 _thread_serial_num = thread_serial_num; | |
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1174 _frame_num = -1; // default - empty stack |
| 0 | 1175 } |
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1176 void set_frame_number(int n) { _frame_num = n; } |
| 0 | 1177 void do_oop(oop* obj_p); |
|
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1178 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1179 }; |
| 1180 | |
| 1181 | |
| 1182 void JNILocalsDumper::do_oop(oop* obj_p) { | |
| 1183 // ignore null or deleted handles | |
| 1184 oop o = *obj_p; | |
| 1185 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
| 1186 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
| 1187 writer()->write_objectID(o); | |
| 1188 writer()->write_u4(_thread_serial_num); | |
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1189 writer()->write_u4((u4)_frame_num); |
| 0 | 1190 } |
| 1191 } | |
| 1192 | |
| 1193 | |
| 1194 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
| 1195 | |
| 1196 class JNIGlobalsDumper : public OopClosure { | |
| 1197 private: | |
| 1198 DumpWriter* _writer; | |
| 1199 DumpWriter* writer() const { return _writer; } | |
| 1200 | |
| 1201 public: | |
| 1202 JNIGlobalsDumper(DumpWriter* writer) { | |
| 1203 _writer = writer; | |
| 1204 } | |
| 1205 void do_oop(oop* obj_p); | |
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1206 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1207 }; |
| 1208 | |
| 1209 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
| 1210 oop o = *obj_p; | |
| 1211 | |
| 1212 // ignore these | |
| 1213 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
| 1214 | |
| 1215 // we ignore global ref to symbols and other internal objects | |
| 1216 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
| 1217 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
| 1218 writer()->write_objectID(o); | |
| 1219 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
| 1220 } | |
| 1221 }; | |
| 1222 | |
| 1223 | |
| 1224 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
| 1225 | |
| 1226 class MonitorUsedDumper : public OopClosure { | |
| 1227 private: | |
| 1228 DumpWriter* _writer; | |
| 1229 DumpWriter* writer() const { return _writer; } | |
| 1230 public: | |
| 1231 MonitorUsedDumper(DumpWriter* writer) { | |
| 1232 _writer = writer; | |
| 1233 } | |
| 1234 void do_oop(oop* obj_p) { | |
| 1235 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
| 1236 writer()->write_objectID(*obj_p); | |
| 1237 } | |
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1238 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1239 }; |
| 1240 | |
| 1241 | |
| 1242 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
| 1243 | |
| 1244 class StickyClassDumper : public OopClosure { | |
| 1245 private: | |
| 1246 DumpWriter* _writer; | |
| 1247 DumpWriter* writer() const { return _writer; } | |
| 1248 public: | |
| 1249 StickyClassDumper(DumpWriter* writer) { | |
| 1250 _writer = writer; | |
| 1251 } | |
| 1252 void do_oop(oop* obj_p); | |
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1253 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1254 }; |
| 1255 | |
| 1256 void StickyClassDumper::do_oop(oop* obj_p) { | |
| 1257 if (*obj_p != NULL) { | |
| 1258 oop o = *obj_p; | |
| 1259 if (o->is_klass()) { | |
| 1260 klassOop k = klassOop(o); | |
| 1261 if (Klass::cast(k)->oop_is_instance()) { | |
| 1262 instanceKlass* ik = instanceKlass::cast(k); | |
| 1263 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); | |
| 1264 writer()->write_classID(ik); | |
| 1265 } | |
| 1266 } | |
| 1267 } | |
| 1268 } | |
| 1269 | |
| 1270 | |
| 1271 class VM_HeapDumper; | |
| 1272 | |
| 1273 // Support class using when iterating over the heap. | |
| 1274 | |
| 1275 class HeapObjectDumper : public ObjectClosure { | |
| 1276 private: | |
| 1277 VM_HeapDumper* _dumper; | |
| 1278 DumpWriter* _writer; | |
| 1279 | |
| 1280 VM_HeapDumper* dumper() { return _dumper; } | |
| 1281 DumpWriter* writer() { return _writer; } | |
| 1282 | |
| 1283 // used to indicate that a record has been writen | |
| 1284 void mark_end_of_record(); | |
| 1285 | |
| 1286 public: | |
| 1287 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
| 1288 _dumper = dumper; | |
| 1289 _writer = writer; | |
| 1290 } | |
| 1291 | |
| 1292 // called for each object in the heap | |
| 1293 void do_object(oop o); | |
| 1294 }; | |
| 1295 | |
| 1296 void HeapObjectDumper::do_object(oop o) { | |
| 1297 // hide the sentinel for deleted handles | |
| 1298 if (o == JNIHandles::deleted_handle()) return; | |
| 1299 | |
| 1300 // ignore KlassKlass objects | |
| 1301 if (o->is_klass()) return; | |
| 1302 | |
| 1303 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
| 1142 | 1304 if (o->klass() == SystemDictionary::Class_klass()) { |
| 0 | 1305 if (!java_lang_Class::is_primitive(o)) { |
| 1306 return; | |
| 1307 } | |
| 1308 } | |
| 1309 | |
| 1310 // create a HPROF_GC_INSTANCE record for each object | |
| 1311 if (o->is_instance()) { | |
| 1312 DumperSupport::dump_instance(writer(), o); | |
| 1313 mark_end_of_record(); | |
| 1314 } else { | |
| 1315 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
| 1316 if (o->is_objArray()) { | |
| 1317 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
| 1318 mark_end_of_record(); | |
| 1319 } else { | |
| 1320 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
| 1321 if (o->is_typeArray()) { | |
| 1322 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
| 1323 mark_end_of_record(); | |
| 1324 } | |
| 1325 } | |
| 1326 } | |
| 1327 } | |
| 1328 | |
| 1329 // The VM operation that performs the heap dump | |
| 1330 class VM_HeapDumper : public VM_GC_Operation { | |
| 1331 private: | |
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1332 static VM_HeapDumper* _global_dumper; |
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1333 static DumpWriter* _global_writer; |
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1334 DumpWriter* _local_writer; |
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1335 JavaThread* _oome_thread; |
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1336 methodOop _oome_constructor; |
| 0 | 1337 bool _gc_before_heap_dump; |
| 1338 bool _is_segmented_dump; | |
| 1339 jlong _dump_start; | |
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1340 GrowableArray<Klass*>* _klass_map; |
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1341 ThreadStackTrace** _stack_traces; |
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1342 int _num_threads; |
| 0 | 1343 |
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1344 // accessors and setters |
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1345 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1346 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1347 void set_global_dumper() { |
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1348 assert(_global_dumper == NULL, "Error"); |
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1349 _global_dumper = this; |
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1350 } |
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1351 void set_global_writer() { |
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1352 assert(_global_writer == NULL, "Error"); |
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1353 _global_writer = _local_writer; |
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1354 } |
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1355 void clear_global_dumper() { _global_dumper = NULL; } |
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1356 void clear_global_writer() { _global_writer = NULL; } |
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1357 |
| 0 | 1358 bool is_segmented_dump() const { return _is_segmented_dump; } |
| 1359 void set_segmented_dump() { _is_segmented_dump = true; } | |
| 1360 jlong dump_start() const { return _dump_start; } | |
| 1361 void set_dump_start(jlong pos); | |
| 1362 | |
| 1363 bool skip_operation() const; | |
| 1364 | |
| 1365 // writes a HPROF_LOAD_CLASS record | |
| 1366 static void do_load_class(klassOop k); | |
| 1367 | |
| 1368 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1369 // (and each array class too) | |
| 1370 static void do_class_dump(klassOop k); | |
| 1371 | |
| 1372 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1373 // array (and each multi-dimensional array too) | |
| 1374 static void do_basic_type_array_class_dump(klassOop k); | |
| 1375 | |
| 1376 // HPROF_GC_ROOT_THREAD_OBJ records | |
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1377 int do_thread(JavaThread* thread, u4 thread_serial_num); |
| 0 | 1378 void do_threads(); |
| 1379 | |
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1380 void add_class_serial_number(Klass* k, int serial_num) { |
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1381 _klass_map->at_put_grow(serial_num, k); |
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1382 } |
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1383 |
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1384 // HPROF_TRACE and HPROF_FRAME records |
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1385 void dump_stack_traces(); |
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1386 |
| 0 | 1387 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
| 1388 void write_dump_header(); | |
| 1389 | |
| 1390 // fixes up the length of the current dump record | |
| 1391 void write_current_dump_record_length(); | |
| 1392 | |
| 1393 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1394 // record in the case of a segmented heap dump) | |
| 1395 void end_of_dump(); | |
| 1396 | |
| 1397 public: | |
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1398 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : |
| 0 | 1399 VM_GC_Operation(0 /* total collections, dummy, ignored */, |
| 2225 | 1400 GCCause::_heap_dump /* GC Cause */, |
| 0 | 1401 0 /* total full collections, dummy, ignored */, |
| 1402 gc_before_heap_dump) { | |
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1403 _local_writer = writer; |
| 0 | 1404 _gc_before_heap_dump = gc_before_heap_dump; |
| 1405 _is_segmented_dump = false; | |
| 1406 _dump_start = (jlong)-1; | |
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1407 _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1408 _stack_traces = NULL; |
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1409 _num_threads = 0; |
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1410 if (oome) { |
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1411 assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); |
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1412 // get OutOfMemoryError zero-parameter constructor |
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1413 instanceKlass* oome_ik = instanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); |
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1414 _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), |
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1415 vmSymbols::void_method_signature()); |
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1416 // get thread throwing OOME when generating the heap dump at OOME |
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1417 _oome_thread = JavaThread::current(); |
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1418 } else { |
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1419 _oome_thread = NULL; |
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1420 _oome_constructor = NULL; |
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1421 } |
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1422 } |
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1423 ~VM_HeapDumper() { |
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1424 if (_stack_traces != NULL) { |
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1425 for (int i=0; i < _num_threads; i++) { |
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1426 delete _stack_traces[i]; |
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1427 } |
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1428 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces); |
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1429 } |
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1430 delete _klass_map; |
| 0 | 1431 } |
| 1432 | |
| 1433 VMOp_Type type() const { return VMOp_HeapDumper; } | |
| 1434 // used to mark sub-record boundary | |
| 1435 void check_segment_length(); | |
| 1436 void doit(); | |
| 1437 }; | |
| 1438 | |
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1439 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1440 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1441 |
| 0 | 1442 bool VM_HeapDumper::skip_operation() const { |
| 1443 return false; | |
| 1444 } | |
| 1445 | |
| 1446 // sets the dump starting position | |
| 1447 void VM_HeapDumper::set_dump_start(jlong pos) { | |
| 1448 _dump_start = pos; | |
| 1449 } | |
| 1450 | |
| 1451 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
| 1452 void VM_HeapDumper::write_dump_header() { | |
| 1453 if (writer()->is_open()) { | |
| 1454 if (is_segmented_dump()) { | |
| 1455 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
| 1456 } else { | |
| 1457 writer()->write_u1(HPROF_HEAP_DUMP); | |
| 1458 } | |
| 1459 writer()->write_u4(0); // current ticks | |
| 1460 | |
| 1461 // record the starting position for the dump (its length will be fixed up later) | |
| 1462 set_dump_start(writer()->current_offset()); | |
| 1463 writer()->write_u4(0); | |
| 1464 } | |
| 1465 } | |
| 1466 | |
| 1467 // fixes up the length of the current dump record | |
| 1468 void VM_HeapDumper::write_current_dump_record_length() { | |
| 1469 if (writer()->is_open()) { | |
| 1470 assert(dump_start() >= 0, "no dump start recorded"); | |
| 1471 | |
| 1472 // calculate the size of the dump record | |
| 1473 jlong dump_end = writer()->current_offset(); | |
| 1474 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1475 | |
| 1476 // record length must fit in a u4 | |
| 1477 if (dump_len > (jlong)(4L*(jlong)G)) { | |
| 1478 warning("record is too large"); | |
| 1479 } | |
| 1480 | |
| 1481 // seek to the dump start and fix-up the length | |
| 1482 writer()->seek_to_offset(dump_start()); | |
| 1483 writer()->write_u4((u4)dump_len); | |
| 1484 | |
| 1485 // adjust the total size written to keep the bytes written correct. | |
| 1486 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
| 1487 | |
| 1488 // seek to dump end so we can continue | |
| 1489 writer()->seek_to_offset(dump_end); | |
| 1490 | |
| 1491 // no current dump record | |
| 1492 set_dump_start((jlong)-1); | |
| 1493 } | |
| 1494 } | |
| 1495 | |
| 1496 // used on a sub-record boundary to check if we need to start a | |
| 1497 // new segment. | |
| 1498 void VM_HeapDumper::check_segment_length() { | |
| 1499 if (writer()->is_open()) { | |
| 1500 if (is_segmented_dump()) { | |
| 1501 // don't use current_offset that would be too expensive on a per record basis | |
| 1502 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
| 1503 assert(dump_end == writer()->current_offset(), "checking"); | |
| 1504 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1505 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
| 1506 | |
| 1507 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
| 1508 write_current_dump_record_length(); | |
| 1509 write_dump_header(); | |
| 1510 } | |
| 1511 } | |
| 1512 } | |
| 1513 } | |
| 1514 | |
| 1515 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1516 // record in the case of a segmented heap dump) | |
| 1517 void VM_HeapDumper::end_of_dump() { | |
| 1518 if (writer()->is_open()) { | |
| 1519 write_current_dump_record_length(); | |
| 1520 | |
| 1521 // for segmented dump we write the end record | |
| 1522 if (is_segmented_dump()) { | |
| 1523 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
| 1524 writer()->write_u4(0); | |
| 1525 writer()->write_u4(0); | |
| 1526 } | |
| 1527 } | |
| 1528 } | |
| 1529 | |
| 1530 // marks sub-record boundary | |
| 1531 void HeapObjectDumper::mark_end_of_record() { | |
| 1532 dumper()->check_segment_length(); | |
| 1533 } | |
| 1534 | |
| 1535 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
| 1536 // array classes) | |
| 1537 void VM_HeapDumper::do_load_class(klassOop k) { | |
| 1538 static u4 class_serial_num = 0; | |
| 1539 | |
| 1540 // len of HPROF_LOAD_CLASS record | |
| 1541 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
| 1542 | |
| 1543 // write a HPROF_LOAD_CLASS for the class and each array class | |
| 1544 do { | |
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1545 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
| 0 | 1546 |
| 1547 // class serial number is just a number | |
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1548 writer()->write_u4(++class_serial_num); |
| 0 | 1549 |
| 1550 // class ID | |
| 1551 Klass* klass = Klass::cast(k); | |
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1552 writer()->write_classID(klass); |
| 0 | 1553 |
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1554 // add the klassOop and class serial number pair |
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1555 dumper()->add_class_serial_number(klass, class_serial_num); |
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1556 |
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1557 writer()->write_u4(STACK_TRACE_ID); |
| 0 | 1558 |
| 1559 // class name ID | |
|
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1560 Symbol* name = klass->name(); |
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1561 writer()->write_symbolID(name); |
| 0 | 1562 |
| 1563 // write a LOAD_CLASS record for the array type (if it exists) | |
| 1564 k = klass->array_klass_or_null(); | |
| 1565 } while (k != NULL); | |
| 1566 } | |
| 1567 | |
| 1568 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1569 void VM_HeapDumper::do_class_dump(klassOop k) { | |
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1570 DumperSupport::dump_class_and_array_classes(writer(), k); |
| 0 | 1571 } |
| 1572 | |
| 1573 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1574 // array (and each multi-dimensional array too) | |
| 1575 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { | |
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1576 DumperSupport::dump_basic_type_array_class(writer(), k); |
| 0 | 1577 } |
| 1578 | |
| 1579 // Walk the stack of the given thread. | |
| 1580 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
| 1581 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
|
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1582 // |
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1583 // It returns the number of Java frames in this thread stack |
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1584 int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
| 0 | 1585 JNILocalsDumper blk(writer(), thread_serial_num); |
| 1586 | |
| 1587 oop threadObj = java_thread->threadObj(); | |
| 1588 assert(threadObj != NULL, "sanity check"); | |
| 1589 | |
|
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1590 int stack_depth = 0; |
| 0 | 1591 if (java_thread->has_last_Java_frame()) { |
| 1592 | |
| 1593 // vframes are resource allocated | |
| 1594 Thread* current_thread = Thread::current(); | |
| 1595 ResourceMark rm(current_thread); | |
| 1596 HandleMark hm(current_thread); | |
| 1597 | |
| 1598 RegisterMap reg_map(java_thread); | |
| 1599 frame f = java_thread->last_frame(); | |
| 1600 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
|
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1601 frame* last_entry_frame = NULL; |
|
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1602 int extra_frames = 0; |
| 0 | 1603 |
|
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1604 if (java_thread == _oome_thread && _oome_constructor != NULL) { |
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1605 extra_frames++; |
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1606 } |
| 0 | 1607 while (vf != NULL) { |
|
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1608 blk.set_frame_number(stack_depth); |
| 0 | 1609 if (vf->is_java_frame()) { |
| 1610 | |
| 1611 // java frame (interpreted, compiled, ...) | |
| 1612 javaVFrame *jvf = javaVFrame::cast(vf); | |
| 1613 if (!(jvf->method()->is_native())) { | |
| 1614 StackValueCollection* locals = jvf->locals(); | |
| 1615 for (int slot=0; slot<locals->size(); slot++) { | |
| 1616 if (locals->at(slot)->type() == T_OBJECT) { | |
| 1617 oop o = locals->obj_at(slot)(); | |
| 1618 | |
| 1619 if (o != NULL) { | |
| 1620 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
| 1621 writer()->write_objectID(o); | |
| 1622 writer()->write_u4(thread_serial_num); | |
|
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1623 writer()->write_u4((u4) (stack_depth + extra_frames)); |
| 0 | 1624 } |
| 1625 } | |
| 1626 } | |
|
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1627 } else { |
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1628 // native frame |
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1629 if (stack_depth == 0) { |
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1630 // JNI locals for the top frame. |
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1631 java_thread->active_handles()->oops_do(&blk); |
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1632 } else { |
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1633 if (last_entry_frame != NULL) { |
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1634 // JNI locals for the entry frame |
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1635 assert(last_entry_frame->is_entry_frame(), "checking"); |
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1636 last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
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1637 } |
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1638 } |
| 0 | 1639 } |
|
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1640 // increment only for Java frames |
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1641 stack_depth++; |
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1642 last_entry_frame = NULL; |
| 0 | 1643 |
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1644 } else { |
| 0 | 1645 // externalVFrame - if it's an entry frame then report any JNI locals |
|
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1646 // as roots when we find the corresponding native javaVFrame |
| 0 | 1647 frame* fr = vf->frame_pointer(); |
| 1648 assert(fr != NULL, "sanity check"); | |
| 1649 if (fr->is_entry_frame()) { | |
|
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1650 last_entry_frame = fr; |
| 0 | 1651 } |
| 1652 } | |
| 1653 vf = vf->sender(); | |
| 1654 } | |
|
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1655 } else { |
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1656 // no last java frame but there may be JNI locals |
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1657 java_thread->active_handles()->oops_do(&blk); |
| 0 | 1658 } |
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1659 return stack_depth; |
| 0 | 1660 } |
| 1661 | |
| 1662 | |
| 1663 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
| 1664 // the stack so that locals and JNI locals are dumped. | |
| 1665 void VM_HeapDumper::do_threads() { | |
|
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1666 for (int i=0; i < _num_threads; i++) { |
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1667 JavaThread* thread = _stack_traces[i]->thread(); |
| 0 | 1668 oop threadObj = thread->threadObj(); |
|
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1669 u4 thread_serial_num = i+1; |
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1670 u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
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1671 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
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1672 writer()->write_objectID(threadObj); |
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1673 writer()->write_u4(thread_serial_num); // thread number |
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1674 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1675 int num_frames = do_thread(thread, thread_serial_num); |
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1676 assert(num_frames == _stack_traces[i]->get_stack_depth(), |
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1677 "total number of Java frames not matched"); |
| 0 | 1678 } |
| 1679 } | |
| 1680 | |
| 1681 | |
| 1682 // The VM operation that dumps the heap. The dump consists of the following | |
| 1683 // records: | |
| 1684 // | |
| 1685 // HPROF_HEADER | |
| 1686 // [HPROF_UTF8]* | |
| 1687 // [HPROF_LOAD_CLASS]* | |
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1688 // [[HPROF_FRAME]*|HPROF_TRACE]* |
| 0 | 1689 // [HPROF_GC_CLASS_DUMP]* |
| 1690 // HPROF_HEAP_DUMP | |
| 1691 // | |
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1692 // The HPROF_TRACE records represent the stack traces where the heap dump |
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1693 // is generated and a "dummy trace" record which does not include |
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1694 // any frames. The dummy trace record is used to be referenced as the |
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1695 // unknown object alloc site. |
| 0 | 1696 // |
| 1697 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
| 1698 // the heap dump be generated in a single pass we remember the position of | |
| 1699 // the dump length and fix it up after all sub-records have been written. | |
| 1700 // To generate the sub-records we iterate over the heap, writing | |
| 1701 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
| 1702 // records as we go. Once that is done we write records for some of the GC | |
| 1703 // roots. | |
| 1704 | |
| 1705 void VM_HeapDumper::doit() { | |
| 1706 | |
| 1707 HandleMark hm; | |
| 1708 CollectedHeap* ch = Universe::heap(); | |
| 1709 if (_gc_before_heap_dump) { | |
| 1710 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
| 1711 } else { | |
| 1712 // make the heap parsable (no need to retire TLABs) | |
| 1713 ch->ensure_parsability(false); | |
| 1714 } | |
| 1715 | |
|
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1716 // At this point we should be the only dumper active, so |
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1717 // the following should be safe. |
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1718 set_global_dumper(); |
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1719 set_global_writer(); |
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1720 |
| 0 | 1721 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
|
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1722 size_t used = ch->used(); |
| 0 | 1723 const char* header; |
| 1724 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
| 1725 set_segmented_dump(); | |
| 1726 header = "JAVA PROFILE 1.0.2"; | |
| 1727 } else { | |
| 1728 header = "JAVA PROFILE 1.0.1"; | |
| 1729 } | |
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1730 |
| 0 | 1731 // header is few bytes long - no chance to overflow int |
| 1732 writer()->write_raw((void*)header, (int)strlen(header)); | |
| 1733 writer()->write_u1(0); // terminator | |
| 1734 writer()->write_u4(oopSize); | |
| 1735 writer()->write_u8(os::javaTimeMillis()); | |
| 1736 | |
| 1737 // HPROF_UTF8 records | |
| 1738 SymbolTableDumper sym_dumper(writer()); | |
|
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1739 SymbolTable::symbols_do(&sym_dumper); |
| 0 | 1740 |
| 1741 // write HPROF_LOAD_CLASS records | |
| 1742 SystemDictionary::classes_do(&do_load_class); | |
| 1743 Universe::basic_type_classes_do(&do_load_class); | |
| 1744 | |
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1745 // write HPROF_FRAME and HPROF_TRACE records |
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1746 // this must be called after _klass_map is built when iterating the classes above. |
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1747 dump_stack_traces(); |
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1748 |
| 0 | 1749 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
| 1750 write_dump_header(); | |
| 1751 | |
| 1752 // Writes HPROF_GC_CLASS_DUMP records | |
| 1753 SystemDictionary::classes_do(&do_class_dump); | |
| 1754 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); | |
| 1755 check_segment_length(); | |
| 1756 | |
| 1757 // writes HPROF_GC_INSTANCE_DUMP records. | |
| 1758 // After each sub-record is written check_segment_length will be invoked. When | |
| 1759 // generated a segmented heap dump this allows us to check if the current | |
| 1760 // segment exceeds a threshold and if so, then a new segment is started. | |
| 1761 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
| 1762 // of the heap dump. | |
| 1763 HeapObjectDumper obj_dumper(this, writer()); | |
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1764 Universe::heap()->safe_object_iterate(&obj_dumper); |
| 0 | 1765 |
| 1766 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
| 1767 do_threads(); | |
| 1768 check_segment_length(); | |
| 1769 | |
| 1770 // HPROF_GC_ROOT_MONITOR_USED | |
| 1771 MonitorUsedDumper mon_dumper(writer()); | |
| 1772 ObjectSynchronizer::oops_do(&mon_dumper); | |
| 1773 check_segment_length(); | |
| 1774 | |
| 1775 // HPROF_GC_ROOT_JNI_GLOBAL | |
| 1776 JNIGlobalsDumper jni_dumper(writer()); | |
| 1777 JNIHandles::oops_do(&jni_dumper); | |
| 1778 check_segment_length(); | |
| 1779 | |
| 1780 // HPROF_GC_ROOT_STICKY_CLASS | |
| 1781 StickyClassDumper class_dumper(writer()); | |
| 1782 SystemDictionary::always_strong_oops_do(&class_dumper); | |
| 1783 | |
| 1784 // fixes up the length of the dump record. In the case of a segmented | |
| 1785 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
| 1786 end_of_dump(); | |
|
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1787 |
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1788 // Now we clear the global variables, so that a future dumper might run. |
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1789 clear_global_dumper(); |
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1790 clear_global_writer(); |
| 0 | 1791 } |
| 1792 | |
|
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1793 void VM_HeapDumper::dump_stack_traces() { |
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1794 // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
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1795 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
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1796 writer()->write_u4((u4) STACK_TRACE_ID); |
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1797 writer()->write_u4(0); // thread number |
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1798 writer()->write_u4(0); // frame count |
|
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1799 |
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1800 _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads()); |
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1801 int frame_serial_num = 0; |
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1802 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
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1803 oop threadObj = thread->threadObj(); |
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1804 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
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1805 // dump thread stack trace |
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1806 ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
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1807 stack_trace->dump_stack_at_safepoint(-1); |
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1808 _stack_traces[_num_threads++] = stack_trace; |
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1809 |
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1810 // write HPROF_FRAME records for this thread's stack trace |
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1811 int depth = stack_trace->get_stack_depth(); |
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1812 int thread_frame_start = frame_serial_num; |
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1813 int extra_frames = 0; |
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1814 // write fake frame that makes it look like the thread, which caused OOME, |
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1815 // is in the OutOfMemoryError zero-parameter constructor |
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1816 if (thread == _oome_thread && _oome_constructor != NULL) { |
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1817 int oome_serial_num = _klass_map->find(Klass::cast(_oome_constructor->method_holder())); |
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1818 // the class serial number starts from 1 |
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1819 assert(oome_serial_num > 0, "OutOfMemoryError class not found"); |
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1820 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, oome_serial_num, |
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1821 _oome_constructor, 0); |
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1822 extra_frames++; |
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1823 } |
|
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1824 for (int j=0; j < depth; j++) { |
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1825 StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
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1826 methodOop m = frame->method(); |
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1827 int class_serial_num = _klass_map->find(Klass::cast(m->method_holder())); |
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1828 // the class serial number starts from 1 |
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1829 assert(class_serial_num > 0, "class not found"); |
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1830 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
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1831 } |
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1832 depth += extra_frames; |
|
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1833 |
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1834 // write HPROF_TRACE record for one thread |
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1835 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
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1836 int stack_serial_num = _num_threads + STACK_TRACE_ID; |
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1837 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1838 writer()->write_u4((u4) _num_threads); // thread serial number |
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1839 writer()->write_u4(depth); // frame count |
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1840 for (int j=1; j <= depth; j++) { |
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1841 writer()->write_id(thread_frame_start + j); |
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1842 } |
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1843 } |
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1844 } |
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1845 } |
| 0 | 1846 |
| 1847 // dump the heap to given path. | |
| 1848 int HeapDumper::dump(const char* path) { | |
| 1849 assert(path != NULL && strlen(path) > 0, "path missing"); | |
| 1850 | |
| 1851 // print message in interactive case | |
| 1852 if (print_to_tty()) { | |
| 1853 tty->print_cr("Dumping heap to %s ...", path); | |
| 1854 timer()->start(); | |
| 1855 } | |
| 1856 | |
| 1857 // create the dump writer. If the file can be opened then bail | |
| 1858 DumpWriter writer(path); | |
| 1859 if (!writer.is_open()) { | |
| 1860 set_error(writer.error()); | |
| 1861 if (print_to_tty()) { | |
| 1862 tty->print_cr("Unable to create %s: %s", path, | |
| 1863 (error() != NULL) ? error() : "reason unknown"); | |
| 1864 } | |
| 1865 return -1; | |
| 1866 } | |
| 1867 | |
| 1868 // generate the dump | |
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1869 VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); |
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1870 if (Thread::current()->is_VM_thread()) { |
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1871 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1872 dumper.doit(); |
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1873 } else { |
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1874 VMThread::execute(&dumper); |
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1875 } |
| 0 | 1876 |
| 1877 // close dump file and record any error that the writer may have encountered | |
| 1878 writer.close(); | |
| 1879 set_error(writer.error()); | |
| 1880 | |
| 1881 // print message in interactive case | |
| 1882 if (print_to_tty()) { | |
| 1883 timer()->stop(); | |
| 1884 if (error() == NULL) { | |
| 1885 char msg[256]; | |
| 1886 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
| 1887 os::jlong_format_specifier(), timer()->seconds()); | |
| 1888 tty->print_cr(msg, writer.bytes_written()); | |
| 1889 } else { | |
| 1890 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
| 1891 } | |
| 1892 } | |
| 1893 | |
| 1894 return (writer.error() == NULL) ? 0 : -1; | |
| 1895 } | |
| 1896 | |
| 1897 // stop timer (if still active), and free any error string we might be holding | |
| 1898 HeapDumper::~HeapDumper() { | |
| 1899 if (timer()->is_active()) { | |
| 1900 timer()->stop(); | |
| 1901 } | |
| 1902 set_error(NULL); | |
| 1903 } | |
| 1904 | |
| 1905 | |
| 1906 // returns the error string (resource allocated), or NULL | |
| 1907 char* HeapDumper::error_as_C_string() const { | |
| 1908 if (error() != NULL) { | |
| 1909 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
| 1910 strcpy(str, error()); | |
| 1911 return str; | |
| 1912 } else { | |
| 1913 return NULL; | |
| 1914 } | |
| 1915 } | |
| 1916 | |
| 1917 // set the error string | |
| 1918 void HeapDumper::set_error(char* error) { | |
| 1919 if (_error != NULL) { | |
| 1920 os::free(_error); | |
| 1921 } | |
| 1922 if (error == NULL) { | |
| 1923 _error = NULL; | |
| 1924 } else { | |
| 1925 _error = os::strdup(error); | |
| 1926 assert(_error != NULL, "allocation failure"); | |
| 1927 } | |
| 1928 } | |
| 1929 | |
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1930 // Called by out-of-memory error reporting by a single Java thread |
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1931 // outside of a JVM safepoint |
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1932 void HeapDumper::dump_heap_from_oome() { |
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1933 HeapDumper::dump_heap(true); |
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1934 } |
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1935 |
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1936 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1937 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1938 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1939 // general use, however, this method will need modification to prevent |
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1940 // inteference when updating the static variables base_path and dump_file_seq below. |
| 0 | 1941 void HeapDumper::dump_heap() { |
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1942 HeapDumper::dump_heap(false); |
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1943 } |
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1944 |
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1945 void HeapDumper::dump_heap(bool oome) { |
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1946 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1947 static uint dump_file_seq = 0; |
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1948 char* my_path; |
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1949 const int max_digit_chars = 20; |
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1950 |
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1951 const char* dump_file_name = "java_pid"; |
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1952 const char* dump_file_ext = ".hprof"; |
| 0 | 1953 |
| 1954 // The dump file defaults to java_pid<pid>.hprof in the current working | |
| 1955 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
| 1956 // dump file name or a directory where dump file is created. | |
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1957 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1958 // Calculate potentially longest base path and check if we have enough |
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1959 // allocated statically. |
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1960 const size_t total_length = |
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1961 (HeapDumpPath == NULL ? 0 : strlen(HeapDumpPath)) + |
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1962 strlen(os::file_separator()) + max_digit_chars + |
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1963 strlen(dump_file_name) + strlen(dump_file_ext) + 1; |
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1964 if (total_length > sizeof(base_path)) { |
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1965 warning("Cannot create heap dump file. HeapDumpPath is too long."); |
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1966 return; |
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1967 } |
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1968 |
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1969 bool use_default_filename = true; |
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1970 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1971 // HeapDumpPath=<file> not specified |
| 0 | 1972 } else { |
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1973 strncpy(base_path, HeapDumpPath, sizeof(base_path)); |
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1974 // check if the path is a directory (must exist) |
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1975 DIR* dir = os::opendir(base_path); |
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1976 if (dir == NULL) { |
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1977 use_default_filename = false; |
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1978 } else { |
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1979 // HeapDumpPath specified a directory. We append a file separator |
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1980 // (if needed). |
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1981 os::closedir(dir); |
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1982 size_t fs_len = strlen(os::file_separator()); |
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1983 if (strlen(base_path) >= fs_len) { |
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1984 char* end = base_path; |
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1985 end += (strlen(base_path) - fs_len); |
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1986 if (strcmp(end, os::file_separator()) != 0) { |
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1987 strcat(base_path, os::file_separator()); |
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1988 } |
| 0 | 1989 } |
| 1990 } | |
| 1991 } | |
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1992 // If HeapDumpPath wasn't a file name then we append the default name |
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1993 if (use_default_filename) { |
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1994 const size_t dlen = strlen(base_path); // if heap dump dir specified |
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1995 jio_snprintf(&base_path[dlen], sizeof(base_path)-dlen, "%s%d%s", |
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1996 dump_file_name, os::current_process_id(), dump_file_ext); |
|
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1997 } |
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1998 const size_t len = strlen(base_path) + 1; |
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1999 my_path = (char*)os::malloc(len); |
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2000 if (my_path == NULL) { |
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2001 warning("Cannot create heap dump file. Out of system memory."); |
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2002 return; |
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2003 } |
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2004 strncpy(my_path, base_path, len); |
|
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2005 } else { |
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2006 // Append a sequence number id for dumps following the first |
|
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2007 const size_t len = strlen(base_path) + max_digit_chars + 2; // for '.' and \0 |
|
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2008 my_path = (char*)os::malloc(len); |
|
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coleenp
parents:
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diff
changeset
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2009 if (my_path == NULL) { |
|
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coleenp
parents:
1972
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changeset
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2010 warning("Cannot create heap dump file. Out of system memory."); |
|
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coleenp
parents:
1972
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changeset
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2011 return; |
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coleenp
parents:
1972
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changeset
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2012 } |
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coleenp
parents:
1972
diff
changeset
|
2013 jio_snprintf(my_path, len, "%s.%d", base_path, dump_file_seq); |
| 0 | 2014 } |
|
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2015 dump_file_seq++; // increment seq number for next time we dump |
| 0 | 2016 |
| 2017 HeapDumper dumper(false /* no GC before heap dump */, | |
|
1775
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thurka
parents:
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diff
changeset
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2018 true /* send to tty */, |
|
30f67acf635d
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parents:
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2019 oome /* pass along out-of-memory-error flag */); |
|
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2020 dumper.dump(my_path); |
|
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parents:
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2021 os::free(my_path); |
| 0 | 2022 } |