Mercurial > hg > truffle
annotate src/share/vm/services/heapDumper.cpp @ 4076:2ceafe3ceb65
7110428: Crash during HeapDump operation
Reviewed-by: ysr, dholmes
| author | poonam |
|---|---|
| date | Wed, 16 Nov 2011 16:27:29 -0800 |
| parents | 167b70ff3abc |
| children | d2a62e0f25eb |
| 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" | |
| 4076 | 30 #include "memory/gcLocker.inline.hpp" |
| 1972 | 31 #include "memory/genCollectedHeap.hpp" |
| 32 #include "memory/universe.hpp" | |
| 33 #include "oops/objArrayKlass.hpp" | |
| 34 #include "runtime/javaCalls.hpp" | |
| 35 #include "runtime/jniHandles.hpp" | |
| 36 #include "runtime/reflectionUtils.hpp" | |
| 37 #include "runtime/vframe.hpp" | |
| 38 #include "runtime/vmThread.hpp" | |
| 39 #include "runtime/vm_operations.hpp" | |
| 40 #include "services/heapDumper.hpp" | |
| 41 #include "services/threadService.hpp" | |
| 42 #include "utilities/ostream.hpp" | |
| 43 #ifndef SERIALGC | |
| 44 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
| 45 #endif | |
| 0 | 46 |
| 47 /* | |
| 48 * HPROF binary format - description copied from: | |
| 49 * src/share/demo/jvmti/hprof/hprof_io.c | |
| 50 * | |
| 51 * | |
| 52 * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" | |
| 53 * (0-terminated) | |
| 54 * | |
| 55 * u4 size of identifiers. Identifiers are used to represent | |
| 56 * UTF8 strings, objects, stack traces, etc. They usually | |
| 57 * have the same size as host pointers. For example, on | |
| 58 * Solaris and Win32, the size is 4. | |
| 59 * u4 high word | |
| 60 * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 | |
| 61 * [record]* a sequence of records. | |
| 62 * | |
| 63 * | |
| 64 * Record format: | |
| 65 * | |
| 66 * u1 a TAG denoting the type of the record | |
| 67 * u4 number of *microseconds* since the time stamp in the | |
| 68 * header. (wraps around in a little more than an hour) | |
| 69 * u4 number of bytes *remaining* in the record. Note that | |
| 70 * this number excludes the tag and the length field itself. | |
| 71 * [u1]* BODY of the record (a sequence of bytes) | |
| 72 * | |
| 73 * | |
| 74 * The following TAGs are supported: | |
| 75 * | |
| 76 * TAG BODY notes | |
| 77 *---------------------------------------------------------- | |
| 78 * HPROF_UTF8 a UTF8-encoded name | |
| 79 * | |
| 80 * id name ID | |
| 81 * [u1]* UTF8 characters (no trailing zero) | |
| 82 * | |
| 83 * HPROF_LOAD_CLASS a newly loaded class | |
| 84 * | |
| 85 * u4 class serial number (> 0) | |
| 86 * id class object ID | |
| 87 * u4 stack trace serial number | |
| 88 * id class name ID | |
| 89 * | |
| 90 * HPROF_UNLOAD_CLASS an unloading class | |
| 91 * | |
| 92 * u4 class serial_number | |
| 93 * | |
| 94 * HPROF_FRAME a Java stack frame | |
| 95 * | |
| 96 * id stack frame ID | |
| 97 * id method name ID | |
| 98 * id method signature ID | |
| 99 * id source file name ID | |
| 100 * u4 class serial number | |
| 101 * i4 line number. >0: normal | |
| 102 * -1: unknown | |
| 103 * -2: compiled method | |
| 104 * -3: native method | |
| 105 * | |
| 106 * HPROF_TRACE a Java stack trace | |
| 107 * | |
| 108 * u4 stack trace serial number | |
| 109 * u4 thread serial number | |
| 110 * u4 number of frames | |
| 111 * [id]* stack frame IDs | |
| 112 * | |
| 113 * | |
| 114 * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC | |
| 115 * | |
| 116 * u2 flags 0x0001: incremental vs. complete | |
| 117 * 0x0002: sorted by allocation vs. live | |
| 118 * 0x0004: whether to force a GC | |
| 119 * u4 cutoff ratio | |
| 120 * u4 total live bytes | |
| 121 * u4 total live instances | |
| 122 * u8 total bytes allocated | |
| 123 * u8 total instances allocated | |
| 124 * u4 number of sites that follow | |
| 125 * [u1 is_array: 0: normal object | |
| 126 * 2: object array | |
| 127 * 4: boolean array | |
| 128 * 5: char array | |
| 129 * 6: float array | |
| 130 * 7: double array | |
| 131 * 8: byte array | |
| 132 * 9: short array | |
| 133 * 10: int array | |
| 134 * 11: long array | |
| 135 * u4 class serial number (may be zero during startup) | |
| 136 * u4 stack trace serial number | |
| 137 * u4 number of bytes alive | |
| 138 * u4 number of instances alive | |
| 139 * u4 number of bytes allocated | |
| 140 * u4]* number of instance allocated | |
| 141 * | |
| 142 * HPROF_START_THREAD a newly started thread. | |
| 143 * | |
| 144 * u4 thread serial number (> 0) | |
| 145 * id thread object ID | |
| 146 * u4 stack trace serial number | |
| 147 * id thread name ID | |
| 148 * id thread group name ID | |
| 149 * id thread group parent name ID | |
| 150 * | |
| 151 * HPROF_END_THREAD a terminating thread. | |
| 152 * | |
| 153 * u4 thread serial number | |
| 154 * | |
| 155 * HPROF_HEAP_SUMMARY heap summary | |
| 156 * | |
| 157 * u4 total live bytes | |
| 158 * u4 total live instances | |
| 159 * u8 total bytes allocated | |
| 160 * u8 total instances allocated | |
| 161 * | |
| 162 * HPROF_HEAP_DUMP denote a heap dump | |
| 163 * | |
| 164 * [heap dump sub-records]* | |
| 165 * | |
| 166 * There are four kinds of heap dump sub-records: | |
| 167 * | |
| 168 * u1 sub-record type | |
| 169 * | |
| 170 * HPROF_GC_ROOT_UNKNOWN unknown root | |
| 171 * | |
| 172 * id object ID | |
| 173 * | |
| 174 * HPROF_GC_ROOT_THREAD_OBJ thread object | |
| 175 * | |
| 176 * id thread object ID (may be 0 for a | |
| 177 * thread newly attached through JNI) | |
| 178 * u4 thread sequence number | |
| 179 * u4 stack trace sequence number | |
| 180 * | |
| 181 * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root | |
| 182 * | |
| 183 * id object ID | |
| 184 * id JNI global ref ID | |
| 185 * | |
| 186 * HPROF_GC_ROOT_JNI_LOCAL JNI local ref | |
| 187 * | |
| 188 * id object ID | |
| 189 * u4 thread serial number | |
| 190 * u4 frame # in stack trace (-1 for empty) | |
| 191 * | |
| 192 * HPROF_GC_ROOT_JAVA_FRAME Java stack frame | |
| 193 * | |
| 194 * id object ID | |
| 195 * u4 thread serial number | |
| 196 * u4 frame # in stack trace (-1 for empty) | |
| 197 * | |
| 198 * HPROF_GC_ROOT_NATIVE_STACK Native stack | |
| 199 * | |
| 200 * id object ID | |
| 201 * u4 thread serial number | |
| 202 * | |
| 203 * HPROF_GC_ROOT_STICKY_CLASS System class | |
| 204 * | |
| 205 * id object ID | |
| 206 * | |
| 207 * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block | |
| 208 * | |
| 209 * id object ID | |
| 210 * u4 thread serial number | |
| 211 * | |
| 212 * HPROF_GC_ROOT_MONITOR_USED Busy monitor | |
| 213 * | |
| 214 * id object ID | |
| 215 * | |
| 216 * HPROF_GC_CLASS_DUMP dump of a class object | |
| 217 * | |
| 218 * id class object ID | |
| 219 * u4 stack trace serial number | |
| 220 * id super class object ID | |
| 221 * id class loader object ID | |
| 222 * id signers object ID | |
| 223 * id protection domain object ID | |
| 224 * id reserved | |
| 225 * id reserved | |
| 226 * | |
| 227 * u4 instance size (in bytes) | |
| 228 * | |
| 229 * u2 size of constant pool | |
| 230 * [u2, constant pool index, | |
| 231 * ty, type | |
| 232 * 2: object | |
| 233 * 4: boolean | |
| 234 * 5: char | |
| 235 * 6: float | |
| 236 * 7: double | |
| 237 * 8: byte | |
| 238 * 9: short | |
| 239 * 10: int | |
| 240 * 11: long | |
| 241 * vl]* and value | |
| 242 * | |
| 243 * u2 number of static fields | |
| 244 * [id, static field name, | |
| 245 * ty, type, | |
| 246 * vl]* and value | |
| 247 * | |
| 248 * u2 number of inst. fields (not inc. super) | |
| 249 * [id, instance field name, | |
| 250 * ty]* type | |
| 251 * | |
| 252 * HPROF_GC_INSTANCE_DUMP dump of a normal object | |
| 253 * | |
| 254 * id object ID | |
| 255 * u4 stack trace serial number | |
| 256 * id class object ID | |
| 257 * u4 number of bytes that follow | |
| 258 * [vl]* instance field values (class, followed | |
| 259 * by super, super's super ...) | |
| 260 * | |
| 261 * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array | |
| 262 * | |
| 263 * id array object ID | |
| 264 * u4 stack trace serial number | |
| 265 * u4 number of elements | |
| 266 * id array class ID | |
| 267 * [id]* elements | |
| 268 * | |
| 269 * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array | |
| 270 * | |
| 271 * id array object ID | |
| 272 * u4 stack trace serial number | |
| 273 * u4 number of elements | |
| 274 * u1 element type | |
| 275 * 4: boolean array | |
| 276 * 5: char array | |
| 277 * 6: float array | |
| 278 * 7: double array | |
| 279 * 8: byte array | |
| 280 * 9: short array | |
| 281 * 10: int array | |
| 282 * 11: long array | |
| 283 * [u1]* elements | |
| 284 * | |
| 285 * HPROF_CPU_SAMPLES a set of sample traces of running threads | |
| 286 * | |
| 287 * u4 total number of samples | |
| 288 * u4 # of traces | |
| 289 * [u4 # of samples | |
| 290 * u4]* stack trace serial number | |
| 291 * | |
| 292 * HPROF_CONTROL_SETTINGS the settings of on/off switches | |
| 293 * | |
| 294 * u4 0x00000001: alloc traces on/off | |
| 295 * 0x00000002: cpu sampling on/off | |
| 296 * u2 stack trace depth | |
| 297 * | |
| 298 * | |
| 299 * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally | |
| 300 * be generated as a sequence of heap dump segments. This sequence is | |
| 301 * terminated by an end record. The additional tags allowed by format | |
| 302 * "JAVA PROFILE 1.0.2" are: | |
| 303 * | |
| 304 * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment | |
| 305 * | |
| 306 * [heap dump sub-records]* | |
| 307 * The same sub-record types allowed by HPROF_HEAP_DUMP | |
| 308 * | |
| 309 * HPROF_HEAP_DUMP_END denotes the end of a heap dump | |
| 310 * | |
| 311 */ | |
| 312 | |
| 313 | |
| 314 // HPROF tags | |
| 315 | |
| 316 typedef enum { | |
| 317 // top-level records | |
| 318 HPROF_UTF8 = 0x01, | |
| 319 HPROF_LOAD_CLASS = 0x02, | |
| 320 HPROF_UNLOAD_CLASS = 0x03, | |
| 321 HPROF_FRAME = 0x04, | |
| 322 HPROF_TRACE = 0x05, | |
| 323 HPROF_ALLOC_SITES = 0x06, | |
| 324 HPROF_HEAP_SUMMARY = 0x07, | |
| 325 HPROF_START_THREAD = 0x0A, | |
| 326 HPROF_END_THREAD = 0x0B, | |
| 327 HPROF_HEAP_DUMP = 0x0C, | |
| 328 HPROF_CPU_SAMPLES = 0x0D, | |
| 329 HPROF_CONTROL_SETTINGS = 0x0E, | |
| 330 | |
| 331 // 1.0.2 record types | |
| 332 HPROF_HEAP_DUMP_SEGMENT = 0x1C, | |
| 333 HPROF_HEAP_DUMP_END = 0x2C, | |
| 334 | |
| 335 // field types | |
| 336 HPROF_ARRAY_OBJECT = 0x01, | |
| 337 HPROF_NORMAL_OBJECT = 0x02, | |
| 338 HPROF_BOOLEAN = 0x04, | |
| 339 HPROF_CHAR = 0x05, | |
| 340 HPROF_FLOAT = 0x06, | |
| 341 HPROF_DOUBLE = 0x07, | |
| 342 HPROF_BYTE = 0x08, | |
| 343 HPROF_SHORT = 0x09, | |
| 344 HPROF_INT = 0x0A, | |
| 345 HPROF_LONG = 0x0B, | |
| 346 | |
| 347 // data-dump sub-records | |
| 348 HPROF_GC_ROOT_UNKNOWN = 0xFF, | |
| 349 HPROF_GC_ROOT_JNI_GLOBAL = 0x01, | |
| 350 HPROF_GC_ROOT_JNI_LOCAL = 0x02, | |
| 351 HPROF_GC_ROOT_JAVA_FRAME = 0x03, | |
| 352 HPROF_GC_ROOT_NATIVE_STACK = 0x04, | |
| 353 HPROF_GC_ROOT_STICKY_CLASS = 0x05, | |
| 354 HPROF_GC_ROOT_THREAD_BLOCK = 0x06, | |
| 355 HPROF_GC_ROOT_MONITOR_USED = 0x07, | |
| 356 HPROF_GC_ROOT_THREAD_OBJ = 0x08, | |
| 357 HPROF_GC_CLASS_DUMP = 0x20, | |
| 358 HPROF_GC_INSTANCE_DUMP = 0x21, | |
| 359 HPROF_GC_OBJ_ARRAY_DUMP = 0x22, | |
| 360 HPROF_GC_PRIM_ARRAY_DUMP = 0x23 | |
| 361 } hprofTag; | |
| 362 | |
| 363 // Default stack trace ID (used for dummy HPROF_TRACE record) | |
| 364 enum { | |
|
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365 STACK_TRACE_ID = 1, |
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366 INITIAL_CLASS_COUNT = 200 |
| 0 | 367 }; |
| 368 | |
| 369 // Supports I/O operations on a dump file | |
| 370 | |
| 371 class DumpWriter : public StackObj { | |
| 372 private: | |
| 373 enum { | |
| 374 io_buffer_size = 8*M | |
| 375 }; | |
| 376 | |
| 377 int _fd; // file descriptor (-1 if dump file not open) | |
| 378 jlong _bytes_written; // number of byte written to dump file | |
| 379 | |
| 380 char* _buffer; // internal buffer | |
| 381 int _size; | |
| 382 int _pos; | |
| 383 | |
| 384 char* _error; // error message when I/O fails | |
| 385 | |
| 386 void set_file_descriptor(int fd) { _fd = fd; } | |
| 387 int file_descriptor() const { return _fd; } | |
| 388 | |
| 389 char* buffer() const { return _buffer; } | |
| 390 int buffer_size() const { return _size; } | |
| 391 int position() const { return _pos; } | |
| 392 void set_position(int pos) { _pos = pos; } | |
| 393 | |
| 394 void set_error(const char* error) { _error = (char*)os::strdup(error); } | |
| 395 | |
| 396 // all I/O go through this function | |
| 397 void write_internal(void* s, int len); | |
| 398 | |
| 399 public: | |
| 400 DumpWriter(const char* path); | |
| 401 ~DumpWriter(); | |
| 402 | |
| 403 void close(); | |
| 404 bool is_open() const { return file_descriptor() >= 0; } | |
| 405 void flush(); | |
| 406 | |
| 407 // total number of bytes written to the disk | |
| 408 jlong bytes_written() const { return _bytes_written; } | |
| 409 | |
| 410 // adjust the number of bytes written to disk (used to keep the count | |
| 411 // of the number of bytes written in case of rewrites) | |
| 412 void adjust_bytes_written(jlong n) { _bytes_written += n; } | |
| 413 | |
| 414 // number of (buffered) bytes as yet unwritten to the dump file | |
| 415 jlong bytes_unwritten() const { return (jlong)position(); } | |
| 416 | |
| 417 char* error() const { return _error; } | |
| 418 | |
| 419 jlong current_offset(); | |
| 420 void seek_to_offset(jlong pos); | |
| 421 | |
| 422 // writer functions | |
| 423 void write_raw(void* s, int len); | |
| 424 void write_u1(u1 x) { write_raw((void*)&x, 1); } | |
| 425 void write_u2(u2 x); | |
| 426 void write_u4(u4 x); | |
| 427 void write_u8(u8 x); | |
| 428 void write_objectID(oop o); | |
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429 void write_symbolID(Symbol* o); |
| 0 | 430 void write_classID(Klass* k); |
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431 void write_id(u4 x); |
| 0 | 432 }; |
| 433 | |
| 434 DumpWriter::DumpWriter(const char* path) { | |
| 435 // try to allocate an I/O buffer of io_buffer_size. If there isn't | |
| 436 // sufficient memory then reduce size until we can allocate something. | |
| 437 _size = io_buffer_size; | |
| 438 do { | |
| 439 _buffer = (char*)os::malloc(_size); | |
| 440 if (_buffer == NULL) { | |
| 441 _size = _size >> 1; | |
| 442 } | |
| 443 } while (_buffer == NULL && _size > 0); | |
| 444 assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); | |
| 445 _pos = 0; | |
| 446 _error = NULL; | |
| 447 _bytes_written = 0L; | |
| 448 _fd = os::create_binary_file(path, false); // don't replace existing file | |
| 449 | |
| 450 // if the open failed we record the error | |
| 451 if (_fd < 0) { | |
| 452 _error = (char*)os::strdup(strerror(errno)); | |
| 453 } | |
| 454 } | |
| 455 | |
| 456 DumpWriter::~DumpWriter() { | |
| 457 // flush and close dump file | |
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458 if (is_open()) { |
| 0 | 459 close(); |
| 460 } | |
| 461 if (_buffer != NULL) os::free(_buffer); | |
| 462 if (_error != NULL) os::free(_error); | |
| 463 } | |
| 464 | |
| 465 // closes dump file (if open) | |
| 466 void DumpWriter::close() { | |
| 467 // flush and close dump file | |
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468 if (is_open()) { |
| 0 | 469 flush(); |
| 470 ::close(file_descriptor()); | |
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471 set_file_descriptor(-1); |
| 0 | 472 } |
| 473 } | |
| 474 | |
| 475 // write directly to the file | |
| 476 void DumpWriter::write_internal(void* s, int len) { | |
| 477 if (is_open()) { | |
| 478 int n = ::write(file_descriptor(), s, len); | |
| 479 if (n > 0) { | |
| 480 _bytes_written += n; | |
| 481 } | |
| 482 if (n != len) { | |
| 483 if (n < 0) { | |
| 484 set_error(strerror(errno)); | |
| 485 } else { | |
| 486 set_error("file size limit"); | |
| 487 } | |
| 488 ::close(file_descriptor()); | |
| 489 set_file_descriptor(-1); | |
| 490 } | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 // write raw bytes | |
| 495 void DumpWriter::write_raw(void* s, int len) { | |
| 496 if (is_open()) { | |
| 497 // flush buffer to make toom | |
| 498 if ((position()+ len) >= buffer_size()) { | |
| 499 flush(); | |
| 500 } | |
| 501 | |
| 502 // buffer not available or too big to buffer it | |
| 503 if ((buffer() == NULL) || (len >= buffer_size())) { | |
| 504 write_internal(s, len); | |
| 505 } else { | |
| 506 // Should optimize this for u1/u2/u4/u8 sizes. | |
| 507 memcpy(buffer() + position(), s, len); | |
| 508 set_position(position() + len); | |
| 509 } | |
| 510 } | |
| 511 } | |
| 512 | |
| 513 // flush any buffered bytes to the file | |
| 514 void DumpWriter::flush() { | |
| 515 if (is_open() && position() > 0) { | |
| 516 write_internal(buffer(), position()); | |
| 517 set_position(0); | |
| 518 } | |
| 519 } | |
| 520 | |
| 521 | |
| 522 jlong DumpWriter::current_offset() { | |
| 523 if (is_open()) { | |
| 524 // the offset is the file offset plus whatever we have buffered | |
| 525 jlong offset = os::current_file_offset(file_descriptor()); | |
| 526 assert(offset >= 0, "lseek failed"); | |
| 527 return offset + (jlong)position(); | |
| 528 } else { | |
| 529 return (jlong)-1; | |
| 530 } | |
| 531 } | |
| 532 | |
| 533 void DumpWriter::seek_to_offset(jlong off) { | |
| 534 assert(off >= 0, "bad offset"); | |
| 535 | |
| 536 // need to flush before seeking | |
| 537 flush(); | |
| 538 | |
| 539 // may be closed due to I/O error | |
| 540 if (is_open()) { | |
| 541 jlong n = os::seek_to_file_offset(file_descriptor(), off); | |
| 542 assert(n >= 0, "lseek failed"); | |
| 543 } | |
| 544 } | |
| 545 | |
| 546 void DumpWriter::write_u2(u2 x) { | |
| 547 u2 v; | |
| 548 Bytes::put_Java_u2((address)&v, x); | |
| 549 write_raw((void*)&v, 2); | |
| 550 } | |
| 551 | |
| 552 void DumpWriter::write_u4(u4 x) { | |
| 553 u4 v; | |
| 554 Bytes::put_Java_u4((address)&v, x); | |
| 555 write_raw((void*)&v, 4); | |
| 556 } | |
| 557 | |
| 558 void DumpWriter::write_u8(u8 x) { | |
| 559 u8 v; | |
| 560 Bytes::put_Java_u8((address)&v, x); | |
| 561 write_raw((void*)&v, 8); | |
| 562 } | |
| 563 | |
| 564 void DumpWriter::write_objectID(oop o) { | |
| 565 address a = (address)((uintptr_t)o); | |
| 566 #ifdef _LP64 | |
| 567 write_u8((u8)a); | |
| 568 #else | |
| 569 write_u4((u4)a); | |
| 570 #endif | |
| 571 } | |
| 572 | |
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573 void DumpWriter::write_symbolID(Symbol* s) { |
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574 address a = (address)((uintptr_t)s); |
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575 #ifdef _LP64 |
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576 write_u8((u8)a); |
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577 #else |
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578 write_u4((u4)a); |
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579 #endif |
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580 } |
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581 |
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582 void DumpWriter::write_id(u4 x) { |
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583 #ifdef _LP64 |
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584 write_u8((u8) x); |
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585 #else |
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586 write_u4(x); |
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587 #endif |
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588 } |
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589 |
| 0 | 590 // We use java mirror as the class ID |
| 591 void DumpWriter::write_classID(Klass* k) { | |
| 592 write_objectID(k->java_mirror()); | |
| 593 } | |
| 594 | |
| 595 | |
| 596 | |
| 597 // Support class with a collection of functions used when dumping the heap | |
| 598 | |
| 599 class DumperSupport : AllStatic { | |
| 600 public: | |
| 601 | |
| 602 // write a header of the given type | |
| 603 static void write_header(DumpWriter* writer, hprofTag tag, u4 len); | |
| 604 | |
| 605 // returns hprof tag for the given type signature | |
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606 static hprofTag sig2tag(Symbol* sig); |
| 0 | 607 // returns hprof tag for the given basic type |
| 608 static hprofTag type2tag(BasicType type); | |
| 609 | |
| 610 // returns the size of the instance of the given class | |
| 611 static u4 instance_size(klassOop k); | |
| 612 | |
| 613 // dump a jfloat | |
| 614 static void dump_float(DumpWriter* writer, jfloat f); | |
| 615 // dump a jdouble | |
| 616 static void dump_double(DumpWriter* writer, jdouble d); | |
| 617 // dumps the raw value of the given field | |
| 618 static void dump_field_value(DumpWriter* writer, char type, address addr); | |
| 619 // dumps static fields of the given class | |
| 620 static void dump_static_fields(DumpWriter* writer, klassOop k); | |
| 621 // dump the raw values of the instance fields of the given object | |
| 622 static void dump_instance_fields(DumpWriter* writer, oop o); | |
| 623 // dumps the definition of the instance fields for a given class | |
| 624 static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); | |
| 625 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 626 static void dump_instance(DumpWriter* writer, oop o); | |
| 627 // creates HPROF_GC_CLASS_DUMP record for the given class and each of its | |
| 628 // array classes | |
| 629 static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); | |
| 630 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 631 // class (and each multi-dimensional array class too) | |
| 632 static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); | |
| 633 | |
| 634 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 635 static void dump_object_array(DumpWriter* writer, objArrayOop array); | |
| 636 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 637 static void dump_prim_array(DumpWriter* writer, typeArrayOop array); | |
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638 // create HPROF_FRAME record for the given method and bci |
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639 static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, methodOop m, int bci); |
| 0 | 640 }; |
| 641 | |
| 642 // write a header of the given type | |
| 643 void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { | |
| 644 writer->write_u1((u1)tag); | |
| 645 writer->write_u4(0); // current ticks | |
| 646 writer->write_u4(len); | |
| 647 } | |
| 648 | |
| 649 // returns hprof tag for the given type signature | |
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650 hprofTag DumperSupport::sig2tag(Symbol* sig) { |
| 0 | 651 switch (sig->byte_at(0)) { |
| 652 case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; | |
| 653 case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; | |
| 654 case JVM_SIGNATURE_BYTE : return HPROF_BYTE; | |
| 655 case JVM_SIGNATURE_CHAR : return HPROF_CHAR; | |
| 656 case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; | |
| 657 case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; | |
| 658 case JVM_SIGNATURE_INT : return HPROF_INT; | |
| 659 case JVM_SIGNATURE_LONG : return HPROF_LONG; | |
| 660 case JVM_SIGNATURE_SHORT : return HPROF_SHORT; | |
| 661 case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; | |
| 662 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 663 } | |
| 664 } | |
| 665 | |
| 666 hprofTag DumperSupport::type2tag(BasicType type) { | |
| 667 switch (type) { | |
| 668 case T_BYTE : return HPROF_BYTE; | |
| 669 case T_CHAR : return HPROF_CHAR; | |
| 670 case T_FLOAT : return HPROF_FLOAT; | |
| 671 case T_DOUBLE : return HPROF_DOUBLE; | |
| 672 case T_INT : return HPROF_INT; | |
| 673 case T_LONG : return HPROF_LONG; | |
| 674 case T_SHORT : return HPROF_SHORT; | |
| 675 case T_BOOLEAN : return HPROF_BOOLEAN; | |
| 676 default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; | |
| 677 } | |
| 678 } | |
| 679 | |
| 680 // dump a jfloat | |
| 681 void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { | |
| 682 if (g_isnan(f)) { | |
| 683 writer->write_u4(0x7fc00000); // collapsing NaNs | |
| 684 } else { | |
| 685 union { | |
| 686 int i; | |
| 687 float f; | |
| 688 } u; | |
| 689 u.f = (float)f; | |
| 690 writer->write_u4((u4)u.i); | |
| 691 } | |
| 692 } | |
| 693 | |
| 694 // dump a jdouble | |
| 695 void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { | |
| 696 union { | |
| 697 jlong l; | |
| 698 double d; | |
| 699 } u; | |
| 700 if (g_isnan(d)) { // collapsing NaNs | |
| 701 u.l = (jlong)(0x7ff80000); | |
| 702 u.l = (u.l << 32); | |
| 703 } else { | |
| 704 u.d = (double)d; | |
| 705 } | |
| 706 writer->write_u8((u8)u.l); | |
| 707 } | |
| 708 | |
| 709 // dumps the raw value of the given field | |
| 710 void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { | |
| 711 switch (type) { | |
| 712 case JVM_SIGNATURE_CLASS : | |
| 713 case JVM_SIGNATURE_ARRAY : { | |
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714 oop o; |
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715 if (UseCompressedOops) { |
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716 o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
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717 } else { |
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718 o = oopDesc::load_decode_heap_oop((oop*)addr); |
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719 } |
| 0 | 720 |
| 721 // reflection and sun.misc.Unsafe classes may have a reference to a | |
| 722 // klassOop so filter it out. | |
| 723 if (o != NULL && o->is_klass()) { | |
| 724 o = NULL; | |
| 725 } | |
| 726 | |
| 727 // FIXME: When sharing is enabled we don't emit field references to objects | |
| 728 // in shared spaces. We can remove this once we write records for the classes | |
| 729 // and strings that are shared. | |
| 730 if (o != NULL && o->is_shared()) { | |
| 731 o = NULL; | |
| 732 } | |
| 733 writer->write_objectID(o); | |
| 734 break; | |
| 735 } | |
| 736 case JVM_SIGNATURE_BYTE : { | |
| 737 jbyte* b = (jbyte*)addr; | |
| 738 writer->write_u1((u1)*b); | |
| 739 break; | |
| 740 } | |
| 741 case JVM_SIGNATURE_CHAR : { | |
| 742 jchar* c = (jchar*)addr; | |
| 743 writer->write_u2((u2)*c); | |
| 744 break; | |
| 745 } | |
| 746 case JVM_SIGNATURE_SHORT : { | |
| 747 jshort* s = (jshort*)addr; | |
| 748 writer->write_u2((u2)*s); | |
| 749 break; | |
| 750 } | |
| 751 case JVM_SIGNATURE_FLOAT : { | |
| 752 jfloat* f = (jfloat*)addr; | |
| 753 dump_float(writer, *f); | |
| 754 break; | |
| 755 } | |
| 756 case JVM_SIGNATURE_DOUBLE : { | |
| 757 jdouble* f = (jdouble*)addr; | |
| 758 dump_double(writer, *f); | |
| 759 break; | |
| 760 } | |
| 761 case JVM_SIGNATURE_INT : { | |
| 762 jint* i = (jint*)addr; | |
| 763 writer->write_u4((u4)*i); | |
| 764 break; | |
| 765 } | |
| 766 case JVM_SIGNATURE_LONG : { | |
| 767 jlong* l = (jlong*)addr; | |
| 768 writer->write_u8((u8)*l); | |
| 769 break; | |
| 770 } | |
| 771 case JVM_SIGNATURE_BOOLEAN : { | |
| 772 jboolean* b = (jboolean*)addr; | |
| 773 writer->write_u1((u1)*b); | |
| 774 break; | |
| 775 } | |
| 776 default : ShouldNotReachHere(); | |
| 777 } | |
| 778 } | |
| 779 | |
| 780 // returns the size of the instance of the given class | |
| 781 u4 DumperSupport::instance_size(klassOop k) { | |
| 782 HandleMark hm; | |
| 783 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 784 | |
| 785 int size = 0; | |
| 786 | |
| 787 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 788 if (!fld.access_flags().is_static()) { | |
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789 Symbol* sig = fld.signature(); |
| 0 | 790 switch (sig->byte_at(0)) { |
| 791 case JVM_SIGNATURE_CLASS : | |
| 792 case JVM_SIGNATURE_ARRAY : size += oopSize; break; | |
| 793 | |
| 794 case JVM_SIGNATURE_BYTE : | |
| 795 case JVM_SIGNATURE_BOOLEAN : size += 1; break; | |
| 796 | |
| 797 case JVM_SIGNATURE_CHAR : | |
| 798 case JVM_SIGNATURE_SHORT : size += 2; break; | |
| 799 | |
| 800 case JVM_SIGNATURE_INT : | |
| 801 case JVM_SIGNATURE_FLOAT : size += 4; break; | |
| 802 | |
| 803 case JVM_SIGNATURE_LONG : | |
| 804 case JVM_SIGNATURE_DOUBLE : size += 8; break; | |
| 805 | |
| 806 default : ShouldNotReachHere(); | |
| 807 } | |
| 808 } | |
| 809 } | |
| 810 return (u4)size; | |
| 811 } | |
| 812 | |
| 813 // dumps static fields of the given class | |
| 814 void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { | |
| 815 HandleMark hm; | |
| 816 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 817 | |
| 818 // pass 1 - count the static fields | |
| 819 u2 field_count = 0; | |
| 820 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 821 if (fldc.access_flags().is_static()) field_count++; | |
| 822 } | |
| 823 | |
| 824 writer->write_u2(field_count); | |
| 825 | |
| 826 // pass 2 - dump the field descriptors and raw values | |
| 827 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 828 if (fld.access_flags().is_static()) { | |
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829 Symbol* sig = fld.signature(); |
| 0 | 830 |
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831 writer->write_symbolID(fld.name()); // name |
| 0 | 832 writer->write_u1(sig2tag(sig)); // type |
| 833 | |
| 834 // value | |
| 835 int offset = fld.offset(); | |
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836 address addr = (address)ikh->java_mirror() + offset; |
| 0 | 837 |
| 838 dump_field_value(writer, sig->byte_at(0), addr); | |
| 839 } | |
| 840 } | |
| 841 } | |
| 842 | |
| 843 // dump the raw values of the instance fields of the given object | |
| 844 void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { | |
| 845 HandleMark hm; | |
| 846 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); | |
| 847 | |
| 848 for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { | |
| 849 if (!fld.access_flags().is_static()) { | |
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850 Symbol* sig = fld.signature(); |
| 0 | 851 address addr = (address)o + fld.offset(); |
| 852 | |
| 853 dump_field_value(writer, sig->byte_at(0), addr); | |
| 854 } | |
| 855 } | |
| 856 } | |
| 857 | |
| 858 // dumps the definition of the instance fields for a given class | |
| 859 void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { | |
| 860 HandleMark hm; | |
| 861 instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); | |
| 862 | |
| 863 // pass 1 - count the instance fields | |
| 864 u2 field_count = 0; | |
| 865 for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { | |
| 866 if (!fldc.access_flags().is_static()) field_count++; | |
| 867 } | |
| 868 | |
| 869 writer->write_u2(field_count); | |
| 870 | |
| 871 // pass 2 - dump the field descriptors | |
| 872 for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { | |
| 873 if (!fld.access_flags().is_static()) { | |
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874 Symbol* sig = fld.signature(); |
| 0 | 875 |
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876 writer->write_symbolID(fld.name()); // name |
| 0 | 877 writer->write_u1(sig2tag(sig)); // type |
| 878 } | |
| 879 } | |
| 880 } | |
| 881 | |
| 882 // creates HPROF_GC_INSTANCE_DUMP record for the given object | |
| 883 void DumperSupport::dump_instance(DumpWriter* writer, oop o) { | |
| 884 klassOop k = o->klass(); | |
| 885 | |
| 886 writer->write_u1(HPROF_GC_INSTANCE_DUMP); | |
| 887 writer->write_objectID(o); | |
| 888 writer->write_u4(STACK_TRACE_ID); | |
| 889 | |
| 890 // class ID | |
| 891 writer->write_classID(Klass::cast(k)); | |
| 892 | |
| 893 // number of bytes that follow | |
| 894 writer->write_u4(instance_size(k) ); | |
| 895 | |
| 896 // field values | |
| 897 dump_instance_fields(writer, o); | |
| 898 } | |
| 899 | |
| 900 // creates HPROF_GC_CLASS_DUMP record for the given class and each of | |
| 901 // its array classes | |
| 902 void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { | |
| 903 Klass* klass = Klass::cast(k); | |
| 904 assert(klass->oop_is_instance(), "not an instanceKlass"); | |
| 905 instanceKlass* ik = (instanceKlass*)klass; | |
| 906 | |
| 907 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 908 | |
| 909 // class ID | |
| 910 writer->write_classID(ik); | |
| 911 writer->write_u4(STACK_TRACE_ID); | |
| 912 | |
| 913 // super class ID | |
| 914 klassOop java_super = ik->java_super(); | |
| 915 if (java_super == NULL) { | |
| 916 writer->write_objectID(NULL); | |
| 917 } else { | |
| 918 writer->write_classID(Klass::cast(java_super)); | |
| 919 } | |
| 920 | |
| 921 writer->write_objectID(ik->class_loader()); | |
| 922 writer->write_objectID(ik->signers()); | |
| 923 writer->write_objectID(ik->protection_domain()); | |
| 924 | |
| 925 // reserved | |
| 926 writer->write_objectID(NULL); | |
| 927 writer->write_objectID(NULL); | |
| 928 | |
| 929 // instance size | |
| 930 writer->write_u4(DumperSupport::instance_size(k)); | |
| 931 | |
| 932 // size of constant pool - ignored by HAT 1.1 | |
| 933 writer->write_u2(0); | |
| 934 | |
| 935 // number of static fields | |
| 936 dump_static_fields(writer, k); | |
| 937 | |
| 938 // description of instance fields | |
| 939 dump_instance_field_descriptors(writer, k); | |
| 940 | |
| 941 // array classes | |
| 942 k = klass->array_klass_or_null(); | |
| 943 while (k != NULL) { | |
| 944 Klass* klass = Klass::cast(k); | |
| 945 assert(klass->oop_is_objArray(), "not an objArrayKlass"); | |
| 946 | |
| 947 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 948 writer->write_classID(klass); | |
| 949 writer->write_u4(STACK_TRACE_ID); | |
| 950 | |
| 951 // super class of array classes is java.lang.Object | |
| 952 java_super = klass->java_super(); | |
| 953 assert(java_super != NULL, "checking"); | |
| 954 writer->write_classID(Klass::cast(java_super)); | |
| 955 | |
| 956 writer->write_objectID(ik->class_loader()); | |
| 957 writer->write_objectID(ik->signers()); | |
| 958 writer->write_objectID(ik->protection_domain()); | |
| 959 | |
| 960 writer->write_objectID(NULL); // reserved | |
| 961 writer->write_objectID(NULL); | |
| 962 writer->write_u4(0); // instance size | |
| 963 writer->write_u2(0); // constant pool | |
| 964 writer->write_u2(0); // static fields | |
| 965 writer->write_u2(0); // instance fields | |
| 966 | |
| 967 // get the array class for the next rank | |
| 968 k = klass->array_klass_or_null(); | |
| 969 } | |
| 970 } | |
| 971 | |
| 972 // creates HPROF_GC_CLASS_DUMP record for a given primitive array | |
| 973 // class (and each multi-dimensional array class too) | |
| 974 void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { | |
| 975 // array classes | |
| 976 while (k != NULL) { | |
| 977 Klass* klass = Klass::cast(k); | |
| 978 | |
| 979 writer->write_u1(HPROF_GC_CLASS_DUMP); | |
| 980 writer->write_classID(klass); | |
| 981 writer->write_u4(STACK_TRACE_ID); | |
| 982 | |
| 983 // super class of array classes is java.lang.Object | |
| 984 klassOop java_super = klass->java_super(); | |
| 985 assert(java_super != NULL, "checking"); | |
| 986 writer->write_classID(Klass::cast(java_super)); | |
| 987 | |
| 988 writer->write_objectID(NULL); // loader | |
| 989 writer->write_objectID(NULL); // signers | |
| 990 writer->write_objectID(NULL); // protection domain | |
| 991 | |
| 992 writer->write_objectID(NULL); // reserved | |
| 993 writer->write_objectID(NULL); | |
| 994 writer->write_u4(0); // instance size | |
| 995 writer->write_u2(0); // constant pool | |
| 996 writer->write_u2(0); // static fields | |
| 997 writer->write_u2(0); // instance fields | |
| 998 | |
| 999 // get the array class for the next rank | |
| 1000 k = klass->array_klass_or_null(); | |
| 1001 } | |
| 1002 } | |
| 1003 | |
| 1004 // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array | |
| 1005 void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { | |
| 1006 | |
| 1007 // filter this | |
| 1008 if (array->klass() == Universe::systemObjArrayKlassObj()) return; | |
| 1009 | |
| 1010 writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); | |
| 1011 writer->write_objectID(array); | |
| 1012 writer->write_u4(STACK_TRACE_ID); | |
| 1013 writer->write_u4((u4)array->length()); | |
| 1014 | |
| 1015 // array class ID | |
| 1016 writer->write_classID(Klass::cast(array->klass())); | |
| 1017 | |
| 1018 // [id]* elements | |
| 1019 for (int index=0; index<array->length(); index++) { | |
| 1020 oop o = array->obj_at(index); | |
| 1021 writer->write_objectID(o); | |
| 1022 } | |
| 1023 } | |
| 1024 | |
| 1025 #define WRITE_ARRAY(Array, Type, Size) \ | |
| 1026 for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } | |
| 1027 | |
| 1028 | |
| 1029 // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array | |
| 1030 void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { | |
| 1031 BasicType type = typeArrayKlass::cast(array->klass())->element_type(); | |
| 1032 | |
| 1033 writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); | |
| 1034 writer->write_objectID(array); | |
| 1035 writer->write_u4(STACK_TRACE_ID); | |
| 1036 writer->write_u4((u4)array->length()); | |
| 1037 writer->write_u1(type2tag(type)); | |
| 1038 | |
| 1039 // nothing to copy | |
| 1040 if (array->length() == 0) { | |
| 1041 return; | |
| 1042 } | |
| 1043 | |
| 1044 // If the byte ordering is big endian then we can copy most types directly | |
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1045 int length_in_bytes = array->length() * type2aelembytes(type); |
| 0 | 1046 assert(length_in_bytes > 0, "nothing to copy"); |
| 1047 | |
| 1048 switch (type) { | |
| 1049 case T_INT : { | |
| 1050 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1051 WRITE_ARRAY(array, int, u4); | |
| 1052 } else { | |
| 1053 writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); | |
| 1054 } | |
| 1055 break; | |
| 1056 } | |
| 1057 case T_BYTE : { | |
| 1058 writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); | |
| 1059 break; | |
| 1060 } | |
| 1061 case T_CHAR : { | |
| 1062 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1063 WRITE_ARRAY(array, char, u2); | |
| 1064 } else { | |
| 1065 writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); | |
| 1066 } | |
| 1067 break; | |
| 1068 } | |
| 1069 case T_SHORT : { | |
| 1070 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1071 WRITE_ARRAY(array, short, u2); | |
| 1072 } else { | |
| 1073 writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); | |
| 1074 } | |
| 1075 break; | |
| 1076 } | |
| 1077 case T_BOOLEAN : { | |
| 1078 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1079 WRITE_ARRAY(array, bool, u1); | |
| 1080 } else { | |
| 1081 writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); | |
| 1082 } | |
| 1083 break; | |
| 1084 } | |
| 1085 case T_LONG : { | |
| 1086 if (Bytes::is_Java_byte_ordering_different()) { | |
| 1087 WRITE_ARRAY(array, long, u8); | |
| 1088 } else { | |
| 1089 writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); | |
| 1090 } | |
| 1091 break; | |
| 1092 } | |
| 1093 | |
| 1094 // handle float/doubles in a special value to ensure than NaNs are | |
| 1095 // written correctly. TO DO: Check if we can avoid this on processors that | |
| 1096 // use IEEE 754. | |
| 1097 | |
| 1098 case T_FLOAT : { | |
| 1099 for (int i=0; i<array->length(); i++) { | |
| 1100 dump_float( writer, array->float_at(i) ); | |
| 1101 } | |
| 1102 break; | |
| 1103 } | |
| 1104 case T_DOUBLE : { | |
| 1105 for (int i=0; i<array->length(); i++) { | |
| 1106 dump_double( writer, array->double_at(i) ); | |
| 1107 } | |
| 1108 break; | |
| 1109 } | |
| 1110 default : ShouldNotReachHere(); | |
| 1111 } | |
| 1112 } | |
| 1113 | |
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1114 // create a HPROF_FRAME record of the given methodOop and bci |
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1115 void DumperSupport::dump_stack_frame(DumpWriter* writer, |
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1116 int frame_serial_num, |
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1117 int class_serial_num, |
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1118 methodOop m, |
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1119 int bci) { |
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1120 int line_number; |
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1121 if (m->is_native()) { |
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1122 line_number = -3; // native frame |
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1123 } else { |
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1124 line_number = m->line_number_from_bci(bci); |
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1125 } |
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1126 |
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1127 write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
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1128 writer->write_id(frame_serial_num); // frame serial number |
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1129 writer->write_symbolID(m->name()); // method's name |
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1130 writer->write_symbolID(m->signature()); // method's signature |
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1131 |
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1132 assert(Klass::cast(m->method_holder())->oop_is_instance(), "not instanceKlass"); |
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1133 writer->write_symbolID(instanceKlass::cast(m->method_holder())->source_file_name()); // source file name |
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1134 writer->write_u4(class_serial_num); // class serial number |
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1135 writer->write_u4((u4) line_number); // line number |
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1136 } |
| 0 | 1137 |
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1138 |
| 0 | 1139 // Support class used to generate HPROF_UTF8 records from the entries in the |
| 1140 // SymbolTable. | |
| 1141 | |
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1142 class SymbolTableDumper : public SymbolClosure { |
| 0 | 1143 private: |
| 1144 DumpWriter* _writer; | |
| 1145 DumpWriter* writer() const { return _writer; } | |
| 1146 public: | |
| 1147 SymbolTableDumper(DumpWriter* writer) { _writer = writer; } | |
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1148 void do_symbol(Symbol** p); |
| 0 | 1149 }; |
| 1150 | |
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1151 void SymbolTableDumper::do_symbol(Symbol** p) { |
| 0 | 1152 ResourceMark rm; |
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1153 Symbol* sym = load_symbol(p); |
| 0 | 1154 int len = sym->utf8_length(); |
| 1155 if (len > 0) { | |
| 1156 char* s = sym->as_utf8(); | |
| 1157 DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); | |
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1158 writer()->write_symbolID(sym); |
| 0 | 1159 writer()->write_raw(s, len); |
| 1160 } | |
| 1161 } | |
| 1162 | |
| 1163 // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records | |
| 1164 | |
| 1165 class JNILocalsDumper : public OopClosure { | |
| 1166 private: | |
| 1167 DumpWriter* _writer; | |
| 1168 u4 _thread_serial_num; | |
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1169 int _frame_num; |
| 0 | 1170 DumpWriter* writer() const { return _writer; } |
| 1171 public: | |
| 1172 JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { | |
| 1173 _writer = writer; | |
| 1174 _thread_serial_num = thread_serial_num; | |
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1175 _frame_num = -1; // default - empty stack |
| 0 | 1176 } |
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1177 void set_frame_number(int n) { _frame_num = n; } |
| 0 | 1178 void do_oop(oop* obj_p); |
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1179 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1180 }; |
| 1181 | |
| 1182 | |
| 1183 void JNILocalsDumper::do_oop(oop* obj_p) { | |
| 1184 // ignore null or deleted handles | |
| 1185 oop o = *obj_p; | |
| 1186 if (o != NULL && o != JNIHandles::deleted_handle()) { | |
| 1187 writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); | |
| 1188 writer()->write_objectID(o); | |
| 1189 writer()->write_u4(_thread_serial_num); | |
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1190 writer()->write_u4((u4)_frame_num); |
| 0 | 1191 } |
| 1192 } | |
| 1193 | |
| 1194 | |
| 1195 // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records | |
| 1196 | |
| 1197 class JNIGlobalsDumper : public OopClosure { | |
| 1198 private: | |
| 1199 DumpWriter* _writer; | |
| 1200 DumpWriter* writer() const { return _writer; } | |
| 1201 | |
| 1202 public: | |
| 1203 JNIGlobalsDumper(DumpWriter* writer) { | |
| 1204 _writer = writer; | |
| 1205 } | |
| 1206 void do_oop(oop* obj_p); | |
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1207 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1208 }; |
| 1209 | |
| 1210 void JNIGlobalsDumper::do_oop(oop* obj_p) { | |
| 1211 oop o = *obj_p; | |
| 1212 | |
| 1213 // ignore these | |
| 1214 if (o == NULL || o == JNIHandles::deleted_handle()) return; | |
| 1215 | |
| 1216 // we ignore global ref to symbols and other internal objects | |
| 1217 if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { | |
| 1218 writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); | |
| 1219 writer()->write_objectID(o); | |
| 1220 writer()->write_objectID((oopDesc*)obj_p); // global ref ID | |
| 1221 } | |
| 1222 }; | |
| 1223 | |
| 1224 | |
| 1225 // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records | |
| 1226 | |
| 1227 class MonitorUsedDumper : public OopClosure { | |
| 1228 private: | |
| 1229 DumpWriter* _writer; | |
| 1230 DumpWriter* writer() const { return _writer; } | |
| 1231 public: | |
| 1232 MonitorUsedDumper(DumpWriter* writer) { | |
| 1233 _writer = writer; | |
| 1234 } | |
| 1235 void do_oop(oop* obj_p) { | |
| 1236 writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); | |
| 1237 writer()->write_objectID(*obj_p); | |
| 1238 } | |
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1239 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1240 }; |
| 1241 | |
| 1242 | |
| 1243 // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records | |
| 1244 | |
| 1245 class StickyClassDumper : public OopClosure { | |
| 1246 private: | |
| 1247 DumpWriter* _writer; | |
| 1248 DumpWriter* writer() const { return _writer; } | |
| 1249 public: | |
| 1250 StickyClassDumper(DumpWriter* writer) { | |
| 1251 _writer = writer; | |
| 1252 } | |
| 1253 void do_oop(oop* obj_p); | |
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1254 void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
| 0 | 1255 }; |
| 1256 | |
| 1257 void StickyClassDumper::do_oop(oop* obj_p) { | |
| 1258 if (*obj_p != NULL) { | |
| 1259 oop o = *obj_p; | |
| 1260 if (o->is_klass()) { | |
| 1261 klassOop k = klassOop(o); | |
| 1262 if (Klass::cast(k)->oop_is_instance()) { | |
| 1263 instanceKlass* ik = instanceKlass::cast(k); | |
| 1264 writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); | |
| 1265 writer()->write_classID(ik); | |
| 1266 } | |
| 1267 } | |
| 1268 } | |
| 1269 } | |
| 1270 | |
| 1271 | |
| 1272 class VM_HeapDumper; | |
| 1273 | |
| 1274 // Support class using when iterating over the heap. | |
| 1275 | |
| 1276 class HeapObjectDumper : public ObjectClosure { | |
| 1277 private: | |
| 1278 VM_HeapDumper* _dumper; | |
| 1279 DumpWriter* _writer; | |
| 1280 | |
| 1281 VM_HeapDumper* dumper() { return _dumper; } | |
| 1282 DumpWriter* writer() { return _writer; } | |
| 1283 | |
| 1284 // used to indicate that a record has been writen | |
| 1285 void mark_end_of_record(); | |
| 1286 | |
| 1287 public: | |
| 1288 HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { | |
| 1289 _dumper = dumper; | |
| 1290 _writer = writer; | |
| 1291 } | |
| 1292 | |
| 1293 // called for each object in the heap | |
| 1294 void do_object(oop o); | |
| 1295 }; | |
| 1296 | |
| 1297 void HeapObjectDumper::do_object(oop o) { | |
| 1298 // hide the sentinel for deleted handles | |
| 1299 if (o == JNIHandles::deleted_handle()) return; | |
| 1300 | |
| 1301 // ignore KlassKlass objects | |
| 1302 if (o->is_klass()) return; | |
| 1303 | |
| 1304 // skip classes as these emitted as HPROF_GC_CLASS_DUMP records | |
| 1142 | 1305 if (o->klass() == SystemDictionary::Class_klass()) { |
| 0 | 1306 if (!java_lang_Class::is_primitive(o)) { |
| 1307 return; | |
| 1308 } | |
| 1309 } | |
| 1310 | |
| 1311 // create a HPROF_GC_INSTANCE record for each object | |
| 1312 if (o->is_instance()) { | |
| 1313 DumperSupport::dump_instance(writer(), o); | |
| 1314 mark_end_of_record(); | |
| 1315 } else { | |
| 1316 // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array | |
| 1317 if (o->is_objArray()) { | |
| 1318 DumperSupport::dump_object_array(writer(), objArrayOop(o)); | |
| 1319 mark_end_of_record(); | |
| 1320 } else { | |
| 1321 // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array | |
| 1322 if (o->is_typeArray()) { | |
| 1323 DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); | |
| 1324 mark_end_of_record(); | |
| 1325 } | |
| 1326 } | |
| 1327 } | |
| 1328 } | |
| 1329 | |
| 1330 // The VM operation that performs the heap dump | |
| 1331 class VM_HeapDumper : public VM_GC_Operation { | |
| 1332 private: | |
|
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1333 static VM_HeapDumper* _global_dumper; |
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1334 static DumpWriter* _global_writer; |
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1335 DumpWriter* _local_writer; |
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1336 JavaThread* _oome_thread; |
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1337 methodOop _oome_constructor; |
| 0 | 1338 bool _gc_before_heap_dump; |
| 1339 bool _is_segmented_dump; | |
| 1340 jlong _dump_start; | |
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1341 GrowableArray<Klass*>* _klass_map; |
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1342 ThreadStackTrace** _stack_traces; |
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1343 int _num_threads; |
| 0 | 1344 |
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1345 // accessors and setters |
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1346 static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
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1347 static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
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1348 void set_global_dumper() { |
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1349 assert(_global_dumper == NULL, "Error"); |
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1350 _global_dumper = this; |
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1351 } |
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1352 void set_global_writer() { |
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1353 assert(_global_writer == NULL, "Error"); |
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1354 _global_writer = _local_writer; |
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1355 } |
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1356 void clear_global_dumper() { _global_dumper = NULL; } |
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1357 void clear_global_writer() { _global_writer = NULL; } |
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1358 |
| 0 | 1359 bool is_segmented_dump() const { return _is_segmented_dump; } |
| 1360 void set_segmented_dump() { _is_segmented_dump = true; } | |
| 1361 jlong dump_start() const { return _dump_start; } | |
| 1362 void set_dump_start(jlong pos); | |
| 1363 | |
| 1364 bool skip_operation() const; | |
| 1365 | |
| 1366 // writes a HPROF_LOAD_CLASS record | |
| 1367 static void do_load_class(klassOop k); | |
| 1368 | |
| 1369 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1370 // (and each array class too) | |
| 1371 static void do_class_dump(klassOop k); | |
| 1372 | |
| 1373 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1374 // array (and each multi-dimensional array too) | |
| 1375 static void do_basic_type_array_class_dump(klassOop k); | |
| 1376 | |
| 1377 // HPROF_GC_ROOT_THREAD_OBJ records | |
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1378 int do_thread(JavaThread* thread, u4 thread_serial_num); |
| 0 | 1379 void do_threads(); |
| 1380 | |
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1381 void add_class_serial_number(Klass* k, int serial_num) { |
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1382 _klass_map->at_put_grow(serial_num, k); |
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1383 } |
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1384 |
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1385 // HPROF_TRACE and HPROF_FRAME records |
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1386 void dump_stack_traces(); |
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1387 |
| 0 | 1388 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
| 1389 void write_dump_header(); | |
| 1390 | |
| 1391 // fixes up the length of the current dump record | |
| 1392 void write_current_dump_record_length(); | |
| 1393 | |
| 1394 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1395 // record in the case of a segmented heap dump) | |
| 1396 void end_of_dump(); | |
| 1397 | |
| 1398 public: | |
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1399 VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : |
| 0 | 1400 VM_GC_Operation(0 /* total collections, dummy, ignored */, |
| 2225 | 1401 GCCause::_heap_dump /* GC Cause */, |
| 0 | 1402 0 /* total full collections, dummy, ignored */, |
| 1403 gc_before_heap_dump) { | |
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1404 _local_writer = writer; |
| 0 | 1405 _gc_before_heap_dump = gc_before_heap_dump; |
| 1406 _is_segmented_dump = false; | |
| 1407 _dump_start = (jlong)-1; | |
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1408 _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
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1409 _stack_traces = NULL; |
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1410 _num_threads = 0; |
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1411 if (oome) { |
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1412 assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); |
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1413 // get OutOfMemoryError zero-parameter constructor |
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1414 instanceKlass* oome_ik = instanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); |
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1415 _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), |
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1416 vmSymbols::void_method_signature()); |
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1417 // get thread throwing OOME when generating the heap dump at OOME |
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1418 _oome_thread = JavaThread::current(); |
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1419 } else { |
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1420 _oome_thread = NULL; |
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1421 _oome_constructor = NULL; |
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1422 } |
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1423 } |
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1424 ~VM_HeapDumper() { |
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1425 if (_stack_traces != NULL) { |
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1426 for (int i=0; i < _num_threads; i++) { |
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1427 delete _stack_traces[i]; |
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1428 } |
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1429 FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces); |
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1430 } |
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1431 delete _klass_map; |
| 0 | 1432 } |
| 1433 | |
| 1434 VMOp_Type type() const { return VMOp_HeapDumper; } | |
| 1435 // used to mark sub-record boundary | |
| 1436 void check_segment_length(); | |
| 1437 void doit(); | |
| 1438 }; | |
| 1439 | |
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1440 VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
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1441 DumpWriter* VM_HeapDumper::_global_writer = NULL; |
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1442 |
| 0 | 1443 bool VM_HeapDumper::skip_operation() const { |
| 1444 return false; | |
| 1445 } | |
| 1446 | |
| 1447 // sets the dump starting position | |
| 1448 void VM_HeapDumper::set_dump_start(jlong pos) { | |
| 1449 _dump_start = pos; | |
| 1450 } | |
| 1451 | |
| 1452 // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record | |
| 1453 void VM_HeapDumper::write_dump_header() { | |
| 1454 if (writer()->is_open()) { | |
| 1455 if (is_segmented_dump()) { | |
| 1456 writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); | |
| 1457 } else { | |
| 1458 writer()->write_u1(HPROF_HEAP_DUMP); | |
| 1459 } | |
| 1460 writer()->write_u4(0); // current ticks | |
| 1461 | |
| 1462 // record the starting position for the dump (its length will be fixed up later) | |
| 1463 set_dump_start(writer()->current_offset()); | |
| 1464 writer()->write_u4(0); | |
| 1465 } | |
| 1466 } | |
| 1467 | |
| 1468 // fixes up the length of the current dump record | |
| 1469 void VM_HeapDumper::write_current_dump_record_length() { | |
| 1470 if (writer()->is_open()) { | |
| 1471 assert(dump_start() >= 0, "no dump start recorded"); | |
| 1472 | |
| 1473 // calculate the size of the dump record | |
| 1474 jlong dump_end = writer()->current_offset(); | |
| 1475 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1476 | |
| 1477 // record length must fit in a u4 | |
| 1478 if (dump_len > (jlong)(4L*(jlong)G)) { | |
| 1479 warning("record is too large"); | |
| 1480 } | |
| 1481 | |
| 1482 // seek to the dump start and fix-up the length | |
| 1483 writer()->seek_to_offset(dump_start()); | |
| 1484 writer()->write_u4((u4)dump_len); | |
| 1485 | |
| 1486 // adjust the total size written to keep the bytes written correct. | |
| 1487 writer()->adjust_bytes_written(-((long) sizeof(u4))); | |
| 1488 | |
| 1489 // seek to dump end so we can continue | |
| 1490 writer()->seek_to_offset(dump_end); | |
| 1491 | |
| 1492 // no current dump record | |
| 1493 set_dump_start((jlong)-1); | |
| 1494 } | |
| 1495 } | |
| 1496 | |
| 1497 // used on a sub-record boundary to check if we need to start a | |
| 1498 // new segment. | |
| 1499 void VM_HeapDumper::check_segment_length() { | |
| 1500 if (writer()->is_open()) { | |
| 1501 if (is_segmented_dump()) { | |
| 1502 // don't use current_offset that would be too expensive on a per record basis | |
| 1503 jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); | |
| 1504 assert(dump_end == writer()->current_offset(), "checking"); | |
| 1505 jlong dump_len = (dump_end - dump_start() - 4); | |
| 1506 assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); | |
| 1507 | |
| 1508 if (dump_len > (jlong)HeapDumpSegmentSize) { | |
| 1509 write_current_dump_record_length(); | |
| 1510 write_dump_header(); | |
| 1511 } | |
| 1512 } | |
| 1513 } | |
| 1514 } | |
| 1515 | |
| 1516 // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END | |
| 1517 // record in the case of a segmented heap dump) | |
| 1518 void VM_HeapDumper::end_of_dump() { | |
| 1519 if (writer()->is_open()) { | |
| 1520 write_current_dump_record_length(); | |
| 1521 | |
| 1522 // for segmented dump we write the end record | |
| 1523 if (is_segmented_dump()) { | |
| 1524 writer()->write_u1(HPROF_HEAP_DUMP_END); | |
| 1525 writer()->write_u4(0); | |
| 1526 writer()->write_u4(0); | |
| 1527 } | |
| 1528 } | |
| 1529 } | |
| 1530 | |
| 1531 // marks sub-record boundary | |
| 1532 void HeapObjectDumper::mark_end_of_record() { | |
| 1533 dumper()->check_segment_length(); | |
| 1534 } | |
| 1535 | |
| 1536 // writes a HPROF_LOAD_CLASS record for the class (and each of its | |
| 1537 // array classes) | |
| 1538 void VM_HeapDumper::do_load_class(klassOop k) { | |
| 1539 static u4 class_serial_num = 0; | |
| 1540 | |
| 1541 // len of HPROF_LOAD_CLASS record | |
| 1542 u4 remaining = 2*oopSize + 2*sizeof(u4); | |
| 1543 | |
| 1544 // write a HPROF_LOAD_CLASS for the class and each array class | |
| 1545 do { | |
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1546 DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
| 0 | 1547 |
| 1548 // class serial number is just a number | |
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1549 writer()->write_u4(++class_serial_num); |
| 0 | 1550 |
| 1551 // class ID | |
| 1552 Klass* klass = Klass::cast(k); | |
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1553 writer()->write_classID(klass); |
| 0 | 1554 |
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1555 // add the klassOop and class serial number pair |
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1556 dumper()->add_class_serial_number(klass, class_serial_num); |
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1557 |
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1558 writer()->write_u4(STACK_TRACE_ID); |
| 0 | 1559 |
| 1560 // class name ID | |
|
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1561 Symbol* name = klass->name(); |
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1562 writer()->write_symbolID(name); |
| 0 | 1563 |
| 1564 // write a LOAD_CLASS record for the array type (if it exists) | |
| 1565 k = klass->array_klass_or_null(); | |
| 1566 } while (k != NULL); | |
| 1567 } | |
| 1568 | |
| 1569 // writes a HPROF_GC_CLASS_DUMP record for the given class | |
| 1570 void VM_HeapDumper::do_class_dump(klassOop k) { | |
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1571 DumperSupport::dump_class_and_array_classes(writer(), k); |
| 0 | 1572 } |
| 1573 | |
| 1574 // writes a HPROF_GC_CLASS_DUMP records for a given basic type | |
| 1575 // array (and each multi-dimensional array too) | |
| 1576 void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { | |
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1577 DumperSupport::dump_basic_type_array_class(writer(), k); |
| 0 | 1578 } |
| 1579 | |
| 1580 // Walk the stack of the given thread. | |
| 1581 // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local | |
| 1582 // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local | |
|
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1583 // |
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1584 // It returns the number of Java frames in this thread stack |
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1585 int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
| 0 | 1586 JNILocalsDumper blk(writer(), thread_serial_num); |
| 1587 | |
| 1588 oop threadObj = java_thread->threadObj(); | |
| 1589 assert(threadObj != NULL, "sanity check"); | |
| 1590 | |
|
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1591 int stack_depth = 0; |
| 0 | 1592 if (java_thread->has_last_Java_frame()) { |
| 1593 | |
| 1594 // vframes are resource allocated | |
| 1595 Thread* current_thread = Thread::current(); | |
| 1596 ResourceMark rm(current_thread); | |
| 1597 HandleMark hm(current_thread); | |
| 1598 | |
| 1599 RegisterMap reg_map(java_thread); | |
| 1600 frame f = java_thread->last_frame(); | |
| 1601 vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); | |
|
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1602 frame* last_entry_frame = NULL; |
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1603 int extra_frames = 0; |
| 0 | 1604 |
|
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1605 if (java_thread == _oome_thread && _oome_constructor != NULL) { |
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1606 extra_frames++; |
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1607 } |
| 0 | 1608 while (vf != NULL) { |
|
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1609 blk.set_frame_number(stack_depth); |
| 0 | 1610 if (vf->is_java_frame()) { |
| 1611 | |
| 1612 // java frame (interpreted, compiled, ...) | |
| 1613 javaVFrame *jvf = javaVFrame::cast(vf); | |
| 1614 if (!(jvf->method()->is_native())) { | |
| 1615 StackValueCollection* locals = jvf->locals(); | |
| 1616 for (int slot=0; slot<locals->size(); slot++) { | |
| 1617 if (locals->at(slot)->type() == T_OBJECT) { | |
| 1618 oop o = locals->obj_at(slot)(); | |
| 1619 | |
| 1620 if (o != NULL) { | |
| 1621 writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); | |
| 1622 writer()->write_objectID(o); | |
| 1623 writer()->write_u4(thread_serial_num); | |
|
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1624 writer()->write_u4((u4) (stack_depth + extra_frames)); |
| 0 | 1625 } |
| 1626 } | |
| 1627 } | |
|
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1628 } else { |
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1629 // native frame |
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1630 if (stack_depth == 0) { |
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1631 // JNI locals for the top frame. |
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1632 java_thread->active_handles()->oops_do(&blk); |
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1633 } else { |
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1634 if (last_entry_frame != NULL) { |
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1635 // JNI locals for the entry frame |
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1636 assert(last_entry_frame->is_entry_frame(), "checking"); |
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1637 last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
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1638 } |
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1639 } |
| 0 | 1640 } |
|
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1641 // increment only for Java frames |
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1642 stack_depth++; |
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1643 last_entry_frame = NULL; |
| 0 | 1644 |
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1645 } else { |
| 0 | 1646 // externalVFrame - if it's an entry frame then report any JNI locals |
|
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1647 // as roots when we find the corresponding native javaVFrame |
| 0 | 1648 frame* fr = vf->frame_pointer(); |
| 1649 assert(fr != NULL, "sanity check"); | |
| 1650 if (fr->is_entry_frame()) { | |
|
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1651 last_entry_frame = fr; |
| 0 | 1652 } |
|
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1653 if (fr->is_ricochet_frame()) { |
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1654 fr->oops_ricochet_do(&blk, vf->register_map()); |
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1655 } |
| 0 | 1656 } |
| 1657 vf = vf->sender(); | |
| 1658 } | |
|
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1659 } else { |
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1660 // no last java frame but there may be JNI locals |
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1661 java_thread->active_handles()->oops_do(&blk); |
| 0 | 1662 } |
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1663 return stack_depth; |
| 0 | 1664 } |
| 1665 | |
| 1666 | |
| 1667 // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk | |
| 1668 // the stack so that locals and JNI locals are dumped. | |
| 1669 void VM_HeapDumper::do_threads() { | |
|
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1670 for (int i=0; i < _num_threads; i++) { |
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1671 JavaThread* thread = _stack_traces[i]->thread(); |
| 0 | 1672 oop threadObj = thread->threadObj(); |
|
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1673 u4 thread_serial_num = i+1; |
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1674 u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
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1675 writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
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1676 writer()->write_objectID(threadObj); |
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1677 writer()->write_u4(thread_serial_num); // thread number |
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1678 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1679 int num_frames = do_thread(thread, thread_serial_num); |
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1680 assert(num_frames == _stack_traces[i]->get_stack_depth(), |
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1681 "total number of Java frames not matched"); |
| 0 | 1682 } |
| 1683 } | |
| 1684 | |
| 1685 | |
| 1686 // The VM operation that dumps the heap. The dump consists of the following | |
| 1687 // records: | |
| 1688 // | |
| 1689 // HPROF_HEADER | |
| 1690 // [HPROF_UTF8]* | |
| 1691 // [HPROF_LOAD_CLASS]* | |
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1692 // [[HPROF_FRAME]*|HPROF_TRACE]* |
| 0 | 1693 // [HPROF_GC_CLASS_DUMP]* |
| 1694 // HPROF_HEAP_DUMP | |
| 1695 // | |
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1696 // The HPROF_TRACE records represent the stack traces where the heap dump |
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1697 // is generated and a "dummy trace" record which does not include |
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1698 // any frames. The dummy trace record is used to be referenced as the |
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1699 // unknown object alloc site. |
| 0 | 1700 // |
| 1701 // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow | |
| 1702 // the heap dump be generated in a single pass we remember the position of | |
| 1703 // the dump length and fix it up after all sub-records have been written. | |
| 1704 // To generate the sub-records we iterate over the heap, writing | |
| 1705 // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP | |
| 1706 // records as we go. Once that is done we write records for some of the GC | |
| 1707 // roots. | |
| 1708 | |
| 1709 void VM_HeapDumper::doit() { | |
| 1710 | |
| 1711 HandleMark hm; | |
| 1712 CollectedHeap* ch = Universe::heap(); | |
| 4076 | 1713 |
| 1714 ch->ensure_parsability(false); // must happen, even if collection does | |
| 1715 // not happen (e.g. due to GC_locker) | |
| 1716 | |
| 0 | 1717 if (_gc_before_heap_dump) { |
| 4076 | 1718 if (GC_locker::is_active()) { |
| 1719 warning("GC locker is held; pre-heapdump GC was skipped"); | |
| 1720 } else { | |
| 1721 ch->collect_as_vm_thread(GCCause::_heap_dump); | |
| 1722 } | |
| 0 | 1723 } |
| 1724 | |
|
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1725 // At this point we should be the only dumper active, so |
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1726 // the following should be safe. |
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1727 set_global_dumper(); |
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1728 set_global_writer(); |
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1729 |
| 0 | 1730 // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
|
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1731 size_t used = ch->used(); |
| 0 | 1732 const char* header; |
| 1733 if (used > (size_t)SegmentedHeapDumpThreshold) { | |
| 1734 set_segmented_dump(); | |
| 1735 header = "JAVA PROFILE 1.0.2"; | |
| 1736 } else { | |
| 1737 header = "JAVA PROFILE 1.0.1"; | |
| 1738 } | |
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1739 |
| 0 | 1740 // header is few bytes long - no chance to overflow int |
| 1741 writer()->write_raw((void*)header, (int)strlen(header)); | |
| 1742 writer()->write_u1(0); // terminator | |
| 1743 writer()->write_u4(oopSize); | |
| 1744 writer()->write_u8(os::javaTimeMillis()); | |
| 1745 | |
| 1746 // HPROF_UTF8 records | |
| 1747 SymbolTableDumper sym_dumper(writer()); | |
|
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1748 SymbolTable::symbols_do(&sym_dumper); |
| 0 | 1749 |
| 1750 // write HPROF_LOAD_CLASS records | |
| 1751 SystemDictionary::classes_do(&do_load_class); | |
| 1752 Universe::basic_type_classes_do(&do_load_class); | |
| 1753 | |
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1754 // write HPROF_FRAME and HPROF_TRACE records |
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1755 // this must be called after _klass_map is built when iterating the classes above. |
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1756 dump_stack_traces(); |
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1757 |
| 0 | 1758 // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
| 1759 write_dump_header(); | |
| 1760 | |
| 1761 // Writes HPROF_GC_CLASS_DUMP records | |
| 1762 SystemDictionary::classes_do(&do_class_dump); | |
| 1763 Universe::basic_type_classes_do(&do_basic_type_array_class_dump); | |
| 1764 check_segment_length(); | |
| 1765 | |
| 1766 // writes HPROF_GC_INSTANCE_DUMP records. | |
| 1767 // After each sub-record is written check_segment_length will be invoked. When | |
| 1768 // generated a segmented heap dump this allows us to check if the current | |
| 1769 // segment exceeds a threshold and if so, then a new segment is started. | |
| 1770 // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk | |
| 1771 // of the heap dump. | |
| 1772 HeapObjectDumper obj_dumper(this, writer()); | |
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1773 Universe::heap()->safe_object_iterate(&obj_dumper); |
| 0 | 1774 |
| 1775 // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals | |
| 1776 do_threads(); | |
| 1777 check_segment_length(); | |
| 1778 | |
| 1779 // HPROF_GC_ROOT_MONITOR_USED | |
| 1780 MonitorUsedDumper mon_dumper(writer()); | |
| 1781 ObjectSynchronizer::oops_do(&mon_dumper); | |
| 1782 check_segment_length(); | |
| 1783 | |
| 1784 // HPROF_GC_ROOT_JNI_GLOBAL | |
| 1785 JNIGlobalsDumper jni_dumper(writer()); | |
| 1786 JNIHandles::oops_do(&jni_dumper); | |
| 1787 check_segment_length(); | |
| 1788 | |
| 1789 // HPROF_GC_ROOT_STICKY_CLASS | |
| 1790 StickyClassDumper class_dumper(writer()); | |
| 1791 SystemDictionary::always_strong_oops_do(&class_dumper); | |
| 1792 | |
| 1793 // fixes up the length of the dump record. In the case of a segmented | |
| 1794 // heap then the HPROF_HEAP_DUMP_END record is also written. | |
| 1795 end_of_dump(); | |
|
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1796 |
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1797 // Now we clear the global variables, so that a future dumper might run. |
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1798 clear_global_dumper(); |
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1799 clear_global_writer(); |
| 0 | 1800 } |
| 1801 | |
|
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1802 void VM_HeapDumper::dump_stack_traces() { |
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1803 // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
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1804 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
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1805 writer()->write_u4((u4) STACK_TRACE_ID); |
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1806 writer()->write_u4(0); // thread number |
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1807 writer()->write_u4(0); // frame count |
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1808 |
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1809 _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads()); |
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1810 int frame_serial_num = 0; |
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1811 for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
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1812 oop threadObj = thread->threadObj(); |
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1813 if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
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1814 // dump thread stack trace |
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1815 ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
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1816 stack_trace->dump_stack_at_safepoint(-1); |
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1817 _stack_traces[_num_threads++] = stack_trace; |
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1818 |
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1819 // write HPROF_FRAME records for this thread's stack trace |
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1820 int depth = stack_trace->get_stack_depth(); |
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1821 int thread_frame_start = frame_serial_num; |
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1822 int extra_frames = 0; |
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1823 // write fake frame that makes it look like the thread, which caused OOME, |
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1824 // is in the OutOfMemoryError zero-parameter constructor |
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1825 if (thread == _oome_thread && _oome_constructor != NULL) { |
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1826 int oome_serial_num = _klass_map->find(Klass::cast(_oome_constructor->method_holder())); |
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1827 // the class serial number starts from 1 |
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1828 assert(oome_serial_num > 0, "OutOfMemoryError class not found"); |
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1829 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, oome_serial_num, |
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1830 _oome_constructor, 0); |
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1831 extra_frames++; |
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1832 } |
|
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1833 for (int j=0; j < depth; j++) { |
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1834 StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
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1835 methodOop m = frame->method(); |
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1836 int class_serial_num = _klass_map->find(Klass::cast(m->method_holder())); |
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1837 // the class serial number starts from 1 |
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1838 assert(class_serial_num > 0, "class not found"); |
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1839 DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
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1840 } |
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1841 depth += extra_frames; |
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1842 |
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1843 // write HPROF_TRACE record for one thread |
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1844 DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
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1845 int stack_serial_num = _num_threads + STACK_TRACE_ID; |
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1846 writer()->write_u4(stack_serial_num); // stack trace serial number |
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1847 writer()->write_u4((u4) _num_threads); // thread serial number |
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1848 writer()->write_u4(depth); // frame count |
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1849 for (int j=1; j <= depth; j++) { |
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1850 writer()->write_id(thread_frame_start + j); |
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1851 } |
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1852 } |
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1853 } |
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1854 } |
| 0 | 1855 |
| 1856 // dump the heap to given path. | |
| 1857 int HeapDumper::dump(const char* path) { | |
| 1858 assert(path != NULL && strlen(path) > 0, "path missing"); | |
| 1859 | |
| 1860 // print message in interactive case | |
| 1861 if (print_to_tty()) { | |
| 1862 tty->print_cr("Dumping heap to %s ...", path); | |
| 1863 timer()->start(); | |
| 1864 } | |
| 1865 | |
| 1866 // create the dump writer. If the file can be opened then bail | |
| 1867 DumpWriter writer(path); | |
| 1868 if (!writer.is_open()) { | |
| 1869 set_error(writer.error()); | |
| 1870 if (print_to_tty()) { | |
| 1871 tty->print_cr("Unable to create %s: %s", path, | |
| 1872 (error() != NULL) ? error() : "reason unknown"); | |
| 1873 } | |
| 1874 return -1; | |
| 1875 } | |
| 1876 | |
| 1877 // generate the dump | |
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1878 VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); |
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1879 if (Thread::current()->is_VM_thread()) { |
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1880 assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
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1881 dumper.doit(); |
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1882 } else { |
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1883 VMThread::execute(&dumper); |
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1884 } |
| 0 | 1885 |
| 1886 // close dump file and record any error that the writer may have encountered | |
| 1887 writer.close(); | |
| 1888 set_error(writer.error()); | |
| 1889 | |
| 1890 // print message in interactive case | |
| 1891 if (print_to_tty()) { | |
| 1892 timer()->stop(); | |
| 1893 if (error() == NULL) { | |
| 1894 char msg[256]; | |
| 1895 sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", | |
| 1896 os::jlong_format_specifier(), timer()->seconds()); | |
| 1897 tty->print_cr(msg, writer.bytes_written()); | |
| 1898 } else { | |
| 1899 tty->print_cr("Dump file is incomplete: %s", writer.error()); | |
| 1900 } | |
| 1901 } | |
| 1902 | |
| 1903 return (writer.error() == NULL) ? 0 : -1; | |
| 1904 } | |
| 1905 | |
| 1906 // stop timer (if still active), and free any error string we might be holding | |
| 1907 HeapDumper::~HeapDumper() { | |
| 1908 if (timer()->is_active()) { | |
| 1909 timer()->stop(); | |
| 1910 } | |
| 1911 set_error(NULL); | |
| 1912 } | |
| 1913 | |
| 1914 | |
| 1915 // returns the error string (resource allocated), or NULL | |
| 1916 char* HeapDumper::error_as_C_string() const { | |
| 1917 if (error() != NULL) { | |
| 1918 char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); | |
| 1919 strcpy(str, error()); | |
| 1920 return str; | |
| 1921 } else { | |
| 1922 return NULL; | |
| 1923 } | |
| 1924 } | |
| 1925 | |
| 1926 // set the error string | |
| 1927 void HeapDumper::set_error(char* error) { | |
| 1928 if (_error != NULL) { | |
| 1929 os::free(_error); | |
| 1930 } | |
| 1931 if (error == NULL) { | |
| 1932 _error = NULL; | |
| 1933 } else { | |
| 1934 _error = os::strdup(error); | |
| 1935 assert(_error != NULL, "allocation failure"); | |
| 1936 } | |
| 1937 } | |
| 1938 | |
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1939 // Called by out-of-memory error reporting by a single Java thread |
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1940 // outside of a JVM safepoint |
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1941 void HeapDumper::dump_heap_from_oome() { |
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1942 HeapDumper::dump_heap(true); |
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1943 } |
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1944 |
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1945 // Called by error reporting by a single Java thread outside of a JVM safepoint, |
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1946 // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
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1947 // callers are strictly serialized and guaranteed not to interfere below. For more |
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1948 // general use, however, this method will need modification to prevent |
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1949 // inteference when updating the static variables base_path and dump_file_seq below. |
| 0 | 1950 void HeapDumper::dump_heap() { |
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1951 HeapDumper::dump_heap(false); |
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1952 } |
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1953 |
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1954 void HeapDumper::dump_heap(bool oome) { |
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1955 static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
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1956 static uint dump_file_seq = 0; |
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1957 char* my_path; |
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1958 const int max_digit_chars = 20; |
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1959 |
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1960 const char* dump_file_name = "java_pid"; |
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1961 const char* dump_file_ext = ".hprof"; |
| 0 | 1962 |
| 1963 // The dump file defaults to java_pid<pid>.hprof in the current working | |
| 1964 // directory. HeapDumpPath=<file> can be used to specify an alternative | |
| 1965 // dump file name or a directory where dump file is created. | |
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1966 if (dump_file_seq == 0) { // first time in, we initialize base_path |
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1967 // Calculate potentially longest base path and check if we have enough |
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1968 // allocated statically. |
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1969 const size_t total_length = |
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1970 (HeapDumpPath == NULL ? 0 : strlen(HeapDumpPath)) + |
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1971 strlen(os::file_separator()) + max_digit_chars + |
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1972 strlen(dump_file_name) + strlen(dump_file_ext) + 1; |
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1973 if (total_length > sizeof(base_path)) { |
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1974 warning("Cannot create heap dump file. HeapDumpPath is too long."); |
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1975 return; |
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1976 } |
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1977 |
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1978 bool use_default_filename = true; |
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1979 if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
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1980 // HeapDumpPath=<file> not specified |
| 0 | 1981 } else { |
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1982 strncpy(base_path, HeapDumpPath, sizeof(base_path)); |
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1983 // check if the path is a directory (must exist) |
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1984 DIR* dir = os::opendir(base_path); |
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1985 if (dir == NULL) { |
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1986 use_default_filename = false; |
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1987 } else { |
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1988 // HeapDumpPath specified a directory. We append a file separator |
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1989 // (if needed). |
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1990 os::closedir(dir); |
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1991 size_t fs_len = strlen(os::file_separator()); |
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1992 if (strlen(base_path) >= fs_len) { |
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1993 char* end = base_path; |
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1994 end += (strlen(base_path) - fs_len); |
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1995 if (strcmp(end, os::file_separator()) != 0) { |
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1996 strcat(base_path, os::file_separator()); |
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1997 } |
| 0 | 1998 } |
| 1999 } | |
| 2000 } | |
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2001 // If HeapDumpPath wasn't a file name then we append the default name |
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2002 if (use_default_filename) { |
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2003 const size_t dlen = strlen(base_path); // if heap dump dir specified |
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2004 jio_snprintf(&base_path[dlen], sizeof(base_path)-dlen, "%s%d%s", |
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2005 dump_file_name, os::current_process_id(), dump_file_ext); |
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2006 } |
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2007 const size_t len = strlen(base_path) + 1; |
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2008 my_path = (char*)os::malloc(len); |
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2009 if (my_path == NULL) { |
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2010 warning("Cannot create heap dump file. Out of system memory."); |
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2011 return; |
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2012 } |
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2013 strncpy(my_path, base_path, len); |
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2014 } else { |
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2015 // Append a sequence number id for dumps following the first |
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2016 const size_t len = strlen(base_path) + max_digit_chars + 2; // for '.' and \0 |
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2017 my_path = (char*)os::malloc(len); |
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2018 if (my_path == NULL) { |
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2019 warning("Cannot create heap dump file. Out of system memory."); |
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2020 return; |
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2021 } |
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2022 jio_snprintf(my_path, len, "%s.%d", base_path, dump_file_seq); |
| 0 | 2023 } |
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2024 dump_file_seq++; // increment seq number for next time we dump |
| 0 | 2025 |
| 2026 HeapDumper dumper(false /* no GC before heap dump */, | |
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2027 true /* send to tty */, |
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2028 oome /* pass along out-of-memory-error flag */); |
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2029 dumper.dump(my_path); |
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2030 os::free(my_path); |
| 0 | 2031 } |