Thu, 03 Feb 2011 20:49:09 -0800
7015169: GC Cause not always set
Summary: Sometimes the gc cause was not always set. This caused JStat to print the wrong information.
Reviewed-by: tonyp, ysr
Contributed-by: suenaga.yasumasa@oss.ntt.co.jp
duke@435 | 1 | /* |
brutisso@2532 | 2 | * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "classfile/symbolTable.hpp" |
stefank@2314 | 27 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 28 | #include "classfile/vmSymbols.hpp" |
stefank@2314 | 29 | #include "gc_implementation/shared/vmGCOperations.hpp" |
stefank@2314 | 30 | #include "memory/genCollectedHeap.hpp" |
stefank@2314 | 31 | #include "memory/universe.hpp" |
stefank@2314 | 32 | #include "oops/objArrayKlass.hpp" |
stefank@2314 | 33 | #include "runtime/javaCalls.hpp" |
stefank@2314 | 34 | #include "runtime/jniHandles.hpp" |
stefank@2314 | 35 | #include "runtime/reflectionUtils.hpp" |
stefank@2314 | 36 | #include "runtime/vframe.hpp" |
stefank@2314 | 37 | #include "runtime/vmThread.hpp" |
stefank@2314 | 38 | #include "runtime/vm_operations.hpp" |
stefank@2314 | 39 | #include "services/heapDumper.hpp" |
stefank@2314 | 40 | #include "services/threadService.hpp" |
stefank@2314 | 41 | #include "utilities/ostream.hpp" |
stefank@2314 | 42 | #ifndef SERIALGC |
stefank@2314 | 43 | #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
stefank@2314 | 44 | #endif |
duke@435 | 45 | |
duke@435 | 46 | /* |
duke@435 | 47 | * HPROF binary format - description copied from: |
duke@435 | 48 | * src/share/demo/jvmti/hprof/hprof_io.c |
duke@435 | 49 | * |
duke@435 | 50 | * |
duke@435 | 51 | * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" |
duke@435 | 52 | * (0-terminated) |
duke@435 | 53 | * |
duke@435 | 54 | * u4 size of identifiers. Identifiers are used to represent |
duke@435 | 55 | * UTF8 strings, objects, stack traces, etc. They usually |
duke@435 | 56 | * have the same size as host pointers. For example, on |
duke@435 | 57 | * Solaris and Win32, the size is 4. |
duke@435 | 58 | * u4 high word |
duke@435 | 59 | * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 |
duke@435 | 60 | * [record]* a sequence of records. |
duke@435 | 61 | * |
duke@435 | 62 | * |
duke@435 | 63 | * Record format: |
duke@435 | 64 | * |
duke@435 | 65 | * u1 a TAG denoting the type of the record |
duke@435 | 66 | * u4 number of *microseconds* since the time stamp in the |
duke@435 | 67 | * header. (wraps around in a little more than an hour) |
duke@435 | 68 | * u4 number of bytes *remaining* in the record. Note that |
duke@435 | 69 | * this number excludes the tag and the length field itself. |
duke@435 | 70 | * [u1]* BODY of the record (a sequence of bytes) |
duke@435 | 71 | * |
duke@435 | 72 | * |
duke@435 | 73 | * The following TAGs are supported: |
duke@435 | 74 | * |
duke@435 | 75 | * TAG BODY notes |
duke@435 | 76 | *---------------------------------------------------------- |
duke@435 | 77 | * HPROF_UTF8 a UTF8-encoded name |
duke@435 | 78 | * |
duke@435 | 79 | * id name ID |
duke@435 | 80 | * [u1]* UTF8 characters (no trailing zero) |
duke@435 | 81 | * |
duke@435 | 82 | * HPROF_LOAD_CLASS a newly loaded class |
duke@435 | 83 | * |
duke@435 | 84 | * u4 class serial number (> 0) |
duke@435 | 85 | * id class object ID |
duke@435 | 86 | * u4 stack trace serial number |
duke@435 | 87 | * id class name ID |
duke@435 | 88 | * |
duke@435 | 89 | * HPROF_UNLOAD_CLASS an unloading class |
duke@435 | 90 | * |
duke@435 | 91 | * u4 class serial_number |
duke@435 | 92 | * |
duke@435 | 93 | * HPROF_FRAME a Java stack frame |
duke@435 | 94 | * |
duke@435 | 95 | * id stack frame ID |
duke@435 | 96 | * id method name ID |
duke@435 | 97 | * id method signature ID |
duke@435 | 98 | * id source file name ID |
duke@435 | 99 | * u4 class serial number |
duke@435 | 100 | * i4 line number. >0: normal |
duke@435 | 101 | * -1: unknown |
duke@435 | 102 | * -2: compiled method |
duke@435 | 103 | * -3: native method |
duke@435 | 104 | * |
duke@435 | 105 | * HPROF_TRACE a Java stack trace |
duke@435 | 106 | * |
duke@435 | 107 | * u4 stack trace serial number |
duke@435 | 108 | * u4 thread serial number |
duke@435 | 109 | * u4 number of frames |
duke@435 | 110 | * [id]* stack frame IDs |
duke@435 | 111 | * |
duke@435 | 112 | * |
duke@435 | 113 | * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC |
duke@435 | 114 | * |
duke@435 | 115 | * u2 flags 0x0001: incremental vs. complete |
duke@435 | 116 | * 0x0002: sorted by allocation vs. live |
duke@435 | 117 | * 0x0004: whether to force a GC |
duke@435 | 118 | * u4 cutoff ratio |
duke@435 | 119 | * u4 total live bytes |
duke@435 | 120 | * u4 total live instances |
duke@435 | 121 | * u8 total bytes allocated |
duke@435 | 122 | * u8 total instances allocated |
duke@435 | 123 | * u4 number of sites that follow |
duke@435 | 124 | * [u1 is_array: 0: normal object |
duke@435 | 125 | * 2: object array |
duke@435 | 126 | * 4: boolean array |
duke@435 | 127 | * 5: char array |
duke@435 | 128 | * 6: float array |
duke@435 | 129 | * 7: double array |
duke@435 | 130 | * 8: byte array |
duke@435 | 131 | * 9: short array |
duke@435 | 132 | * 10: int array |
duke@435 | 133 | * 11: long array |
duke@435 | 134 | * u4 class serial number (may be zero during startup) |
duke@435 | 135 | * u4 stack trace serial number |
duke@435 | 136 | * u4 number of bytes alive |
duke@435 | 137 | * u4 number of instances alive |
duke@435 | 138 | * u4 number of bytes allocated |
duke@435 | 139 | * u4]* number of instance allocated |
duke@435 | 140 | * |
duke@435 | 141 | * HPROF_START_THREAD a newly started thread. |
duke@435 | 142 | * |
duke@435 | 143 | * u4 thread serial number (> 0) |
duke@435 | 144 | * id thread object ID |
duke@435 | 145 | * u4 stack trace serial number |
duke@435 | 146 | * id thread name ID |
duke@435 | 147 | * id thread group name ID |
duke@435 | 148 | * id thread group parent name ID |
duke@435 | 149 | * |
duke@435 | 150 | * HPROF_END_THREAD a terminating thread. |
duke@435 | 151 | * |
duke@435 | 152 | * u4 thread serial number |
duke@435 | 153 | * |
duke@435 | 154 | * HPROF_HEAP_SUMMARY heap summary |
duke@435 | 155 | * |
duke@435 | 156 | * u4 total live bytes |
duke@435 | 157 | * u4 total live instances |
duke@435 | 158 | * u8 total bytes allocated |
duke@435 | 159 | * u8 total instances allocated |
duke@435 | 160 | * |
duke@435 | 161 | * HPROF_HEAP_DUMP denote a heap dump |
duke@435 | 162 | * |
duke@435 | 163 | * [heap dump sub-records]* |
duke@435 | 164 | * |
duke@435 | 165 | * There are four kinds of heap dump sub-records: |
duke@435 | 166 | * |
duke@435 | 167 | * u1 sub-record type |
duke@435 | 168 | * |
duke@435 | 169 | * HPROF_GC_ROOT_UNKNOWN unknown root |
duke@435 | 170 | * |
duke@435 | 171 | * id object ID |
duke@435 | 172 | * |
duke@435 | 173 | * HPROF_GC_ROOT_THREAD_OBJ thread object |
duke@435 | 174 | * |
duke@435 | 175 | * id thread object ID (may be 0 for a |
duke@435 | 176 | * thread newly attached through JNI) |
duke@435 | 177 | * u4 thread sequence number |
duke@435 | 178 | * u4 stack trace sequence number |
duke@435 | 179 | * |
duke@435 | 180 | * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root |
duke@435 | 181 | * |
duke@435 | 182 | * id object ID |
duke@435 | 183 | * id JNI global ref ID |
duke@435 | 184 | * |
duke@435 | 185 | * HPROF_GC_ROOT_JNI_LOCAL JNI local ref |
duke@435 | 186 | * |
duke@435 | 187 | * id object ID |
duke@435 | 188 | * u4 thread serial number |
duke@435 | 189 | * u4 frame # in stack trace (-1 for empty) |
duke@435 | 190 | * |
duke@435 | 191 | * HPROF_GC_ROOT_JAVA_FRAME Java stack frame |
duke@435 | 192 | * |
duke@435 | 193 | * id object ID |
duke@435 | 194 | * u4 thread serial number |
duke@435 | 195 | * u4 frame # in stack trace (-1 for empty) |
duke@435 | 196 | * |
duke@435 | 197 | * HPROF_GC_ROOT_NATIVE_STACK Native stack |
duke@435 | 198 | * |
duke@435 | 199 | * id object ID |
duke@435 | 200 | * u4 thread serial number |
duke@435 | 201 | * |
duke@435 | 202 | * HPROF_GC_ROOT_STICKY_CLASS System class |
duke@435 | 203 | * |
duke@435 | 204 | * id object ID |
duke@435 | 205 | * |
duke@435 | 206 | * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block |
duke@435 | 207 | * |
duke@435 | 208 | * id object ID |
duke@435 | 209 | * u4 thread serial number |
duke@435 | 210 | * |
duke@435 | 211 | * HPROF_GC_ROOT_MONITOR_USED Busy monitor |
duke@435 | 212 | * |
duke@435 | 213 | * id object ID |
duke@435 | 214 | * |
duke@435 | 215 | * HPROF_GC_CLASS_DUMP dump of a class object |
duke@435 | 216 | * |
duke@435 | 217 | * id class object ID |
duke@435 | 218 | * u4 stack trace serial number |
duke@435 | 219 | * id super class object ID |
duke@435 | 220 | * id class loader object ID |
duke@435 | 221 | * id signers object ID |
duke@435 | 222 | * id protection domain object ID |
duke@435 | 223 | * id reserved |
duke@435 | 224 | * id reserved |
duke@435 | 225 | * |
duke@435 | 226 | * u4 instance size (in bytes) |
duke@435 | 227 | * |
duke@435 | 228 | * u2 size of constant pool |
duke@435 | 229 | * [u2, constant pool index, |
duke@435 | 230 | * ty, type |
duke@435 | 231 | * 2: object |
duke@435 | 232 | * 4: boolean |
duke@435 | 233 | * 5: char |
duke@435 | 234 | * 6: float |
duke@435 | 235 | * 7: double |
duke@435 | 236 | * 8: byte |
duke@435 | 237 | * 9: short |
duke@435 | 238 | * 10: int |
duke@435 | 239 | * 11: long |
duke@435 | 240 | * vl]* and value |
duke@435 | 241 | * |
duke@435 | 242 | * u2 number of static fields |
duke@435 | 243 | * [id, static field name, |
duke@435 | 244 | * ty, type, |
duke@435 | 245 | * vl]* and value |
duke@435 | 246 | * |
duke@435 | 247 | * u2 number of inst. fields (not inc. super) |
duke@435 | 248 | * [id, instance field name, |
duke@435 | 249 | * ty]* type |
duke@435 | 250 | * |
duke@435 | 251 | * HPROF_GC_INSTANCE_DUMP dump of a normal object |
duke@435 | 252 | * |
duke@435 | 253 | * id object ID |
duke@435 | 254 | * u4 stack trace serial number |
duke@435 | 255 | * id class object ID |
duke@435 | 256 | * u4 number of bytes that follow |
duke@435 | 257 | * [vl]* instance field values (class, followed |
duke@435 | 258 | * by super, super's super ...) |
duke@435 | 259 | * |
duke@435 | 260 | * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array |
duke@435 | 261 | * |
duke@435 | 262 | * id array object ID |
duke@435 | 263 | * u4 stack trace serial number |
duke@435 | 264 | * u4 number of elements |
duke@435 | 265 | * id array class ID |
duke@435 | 266 | * [id]* elements |
duke@435 | 267 | * |
duke@435 | 268 | * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array |
duke@435 | 269 | * |
duke@435 | 270 | * id array object ID |
duke@435 | 271 | * u4 stack trace serial number |
duke@435 | 272 | * u4 number of elements |
duke@435 | 273 | * u1 element type |
duke@435 | 274 | * 4: boolean array |
duke@435 | 275 | * 5: char array |
duke@435 | 276 | * 6: float array |
duke@435 | 277 | * 7: double array |
duke@435 | 278 | * 8: byte array |
duke@435 | 279 | * 9: short array |
duke@435 | 280 | * 10: int array |
duke@435 | 281 | * 11: long array |
duke@435 | 282 | * [u1]* elements |
duke@435 | 283 | * |
duke@435 | 284 | * HPROF_CPU_SAMPLES a set of sample traces of running threads |
duke@435 | 285 | * |
duke@435 | 286 | * u4 total number of samples |
duke@435 | 287 | * u4 # of traces |
duke@435 | 288 | * [u4 # of samples |
duke@435 | 289 | * u4]* stack trace serial number |
duke@435 | 290 | * |
duke@435 | 291 | * HPROF_CONTROL_SETTINGS the settings of on/off switches |
duke@435 | 292 | * |
duke@435 | 293 | * u4 0x00000001: alloc traces on/off |
duke@435 | 294 | * 0x00000002: cpu sampling on/off |
duke@435 | 295 | * u2 stack trace depth |
duke@435 | 296 | * |
duke@435 | 297 | * |
duke@435 | 298 | * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally |
duke@435 | 299 | * be generated as a sequence of heap dump segments. This sequence is |
duke@435 | 300 | * terminated by an end record. The additional tags allowed by format |
duke@435 | 301 | * "JAVA PROFILE 1.0.2" are: |
duke@435 | 302 | * |
duke@435 | 303 | * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment |
duke@435 | 304 | * |
duke@435 | 305 | * [heap dump sub-records]* |
duke@435 | 306 | * The same sub-record types allowed by HPROF_HEAP_DUMP |
duke@435 | 307 | * |
duke@435 | 308 | * HPROF_HEAP_DUMP_END denotes the end of a heap dump |
duke@435 | 309 | * |
duke@435 | 310 | */ |
duke@435 | 311 | |
duke@435 | 312 | |
duke@435 | 313 | // HPROF tags |
duke@435 | 314 | |
duke@435 | 315 | typedef enum { |
duke@435 | 316 | // top-level records |
duke@435 | 317 | HPROF_UTF8 = 0x01, |
duke@435 | 318 | HPROF_LOAD_CLASS = 0x02, |
duke@435 | 319 | HPROF_UNLOAD_CLASS = 0x03, |
duke@435 | 320 | HPROF_FRAME = 0x04, |
duke@435 | 321 | HPROF_TRACE = 0x05, |
duke@435 | 322 | HPROF_ALLOC_SITES = 0x06, |
duke@435 | 323 | HPROF_HEAP_SUMMARY = 0x07, |
duke@435 | 324 | HPROF_START_THREAD = 0x0A, |
duke@435 | 325 | HPROF_END_THREAD = 0x0B, |
duke@435 | 326 | HPROF_HEAP_DUMP = 0x0C, |
duke@435 | 327 | HPROF_CPU_SAMPLES = 0x0D, |
duke@435 | 328 | HPROF_CONTROL_SETTINGS = 0x0E, |
duke@435 | 329 | |
duke@435 | 330 | // 1.0.2 record types |
duke@435 | 331 | HPROF_HEAP_DUMP_SEGMENT = 0x1C, |
duke@435 | 332 | HPROF_HEAP_DUMP_END = 0x2C, |
duke@435 | 333 | |
duke@435 | 334 | // field types |
duke@435 | 335 | HPROF_ARRAY_OBJECT = 0x01, |
duke@435 | 336 | HPROF_NORMAL_OBJECT = 0x02, |
duke@435 | 337 | HPROF_BOOLEAN = 0x04, |
duke@435 | 338 | HPROF_CHAR = 0x05, |
duke@435 | 339 | HPROF_FLOAT = 0x06, |
duke@435 | 340 | HPROF_DOUBLE = 0x07, |
duke@435 | 341 | HPROF_BYTE = 0x08, |
duke@435 | 342 | HPROF_SHORT = 0x09, |
duke@435 | 343 | HPROF_INT = 0x0A, |
duke@435 | 344 | HPROF_LONG = 0x0B, |
duke@435 | 345 | |
duke@435 | 346 | // data-dump sub-records |
duke@435 | 347 | HPROF_GC_ROOT_UNKNOWN = 0xFF, |
duke@435 | 348 | HPROF_GC_ROOT_JNI_GLOBAL = 0x01, |
duke@435 | 349 | HPROF_GC_ROOT_JNI_LOCAL = 0x02, |
duke@435 | 350 | HPROF_GC_ROOT_JAVA_FRAME = 0x03, |
duke@435 | 351 | HPROF_GC_ROOT_NATIVE_STACK = 0x04, |
duke@435 | 352 | HPROF_GC_ROOT_STICKY_CLASS = 0x05, |
duke@435 | 353 | HPROF_GC_ROOT_THREAD_BLOCK = 0x06, |
duke@435 | 354 | HPROF_GC_ROOT_MONITOR_USED = 0x07, |
duke@435 | 355 | HPROF_GC_ROOT_THREAD_OBJ = 0x08, |
duke@435 | 356 | HPROF_GC_CLASS_DUMP = 0x20, |
duke@435 | 357 | HPROF_GC_INSTANCE_DUMP = 0x21, |
duke@435 | 358 | HPROF_GC_OBJ_ARRAY_DUMP = 0x22, |
duke@435 | 359 | HPROF_GC_PRIM_ARRAY_DUMP = 0x23 |
duke@435 | 360 | } hprofTag; |
duke@435 | 361 | |
duke@435 | 362 | // Default stack trace ID (used for dummy HPROF_TRACE record) |
duke@435 | 363 | enum { |
mchung@831 | 364 | STACK_TRACE_ID = 1, |
mchung@831 | 365 | INITIAL_CLASS_COUNT = 200 |
duke@435 | 366 | }; |
duke@435 | 367 | |
duke@435 | 368 | // Supports I/O operations on a dump file |
duke@435 | 369 | |
duke@435 | 370 | class DumpWriter : public StackObj { |
duke@435 | 371 | private: |
duke@435 | 372 | enum { |
duke@435 | 373 | io_buffer_size = 8*M |
duke@435 | 374 | }; |
duke@435 | 375 | |
duke@435 | 376 | int _fd; // file descriptor (-1 if dump file not open) |
duke@435 | 377 | jlong _bytes_written; // number of byte written to dump file |
duke@435 | 378 | |
duke@435 | 379 | char* _buffer; // internal buffer |
duke@435 | 380 | int _size; |
duke@435 | 381 | int _pos; |
duke@435 | 382 | |
duke@435 | 383 | char* _error; // error message when I/O fails |
duke@435 | 384 | |
duke@435 | 385 | void set_file_descriptor(int fd) { _fd = fd; } |
duke@435 | 386 | int file_descriptor() const { return _fd; } |
duke@435 | 387 | |
duke@435 | 388 | char* buffer() const { return _buffer; } |
duke@435 | 389 | int buffer_size() const { return _size; } |
duke@435 | 390 | int position() const { return _pos; } |
duke@435 | 391 | void set_position(int pos) { _pos = pos; } |
duke@435 | 392 | |
duke@435 | 393 | void set_error(const char* error) { _error = (char*)os::strdup(error); } |
duke@435 | 394 | |
duke@435 | 395 | // all I/O go through this function |
duke@435 | 396 | void write_internal(void* s, int len); |
duke@435 | 397 | |
duke@435 | 398 | public: |
duke@435 | 399 | DumpWriter(const char* path); |
duke@435 | 400 | ~DumpWriter(); |
duke@435 | 401 | |
duke@435 | 402 | void close(); |
duke@435 | 403 | bool is_open() const { return file_descriptor() >= 0; } |
duke@435 | 404 | void flush(); |
duke@435 | 405 | |
duke@435 | 406 | // total number of bytes written to the disk |
duke@435 | 407 | jlong bytes_written() const { return _bytes_written; } |
duke@435 | 408 | |
duke@435 | 409 | // adjust the number of bytes written to disk (used to keep the count |
duke@435 | 410 | // of the number of bytes written in case of rewrites) |
duke@435 | 411 | void adjust_bytes_written(jlong n) { _bytes_written += n; } |
duke@435 | 412 | |
duke@435 | 413 | // number of (buffered) bytes as yet unwritten to the dump file |
duke@435 | 414 | jlong bytes_unwritten() const { return (jlong)position(); } |
duke@435 | 415 | |
duke@435 | 416 | char* error() const { return _error; } |
duke@435 | 417 | |
duke@435 | 418 | jlong current_offset(); |
duke@435 | 419 | void seek_to_offset(jlong pos); |
duke@435 | 420 | |
duke@435 | 421 | // writer functions |
duke@435 | 422 | void write_raw(void* s, int len); |
duke@435 | 423 | void write_u1(u1 x) { write_raw((void*)&x, 1); } |
duke@435 | 424 | void write_u2(u2 x); |
duke@435 | 425 | void write_u4(u4 x); |
duke@435 | 426 | void write_u8(u8 x); |
duke@435 | 427 | void write_objectID(oop o); |
coleenp@2497 | 428 | void write_symbolID(Symbol* o); |
duke@435 | 429 | void write_classID(Klass* k); |
mchung@831 | 430 | void write_id(u4 x); |
duke@435 | 431 | }; |
duke@435 | 432 | |
duke@435 | 433 | DumpWriter::DumpWriter(const char* path) { |
duke@435 | 434 | // try to allocate an I/O buffer of io_buffer_size. If there isn't |
duke@435 | 435 | // sufficient memory then reduce size until we can allocate something. |
duke@435 | 436 | _size = io_buffer_size; |
duke@435 | 437 | do { |
duke@435 | 438 | _buffer = (char*)os::malloc(_size); |
duke@435 | 439 | if (_buffer == NULL) { |
duke@435 | 440 | _size = _size >> 1; |
duke@435 | 441 | } |
duke@435 | 442 | } while (_buffer == NULL && _size > 0); |
duke@435 | 443 | assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); |
duke@435 | 444 | _pos = 0; |
duke@435 | 445 | _error = NULL; |
duke@435 | 446 | _bytes_written = 0L; |
duke@435 | 447 | _fd = os::create_binary_file(path, false); // don't replace existing file |
duke@435 | 448 | |
duke@435 | 449 | // if the open failed we record the error |
duke@435 | 450 | if (_fd < 0) { |
duke@435 | 451 | _error = (char*)os::strdup(strerror(errno)); |
duke@435 | 452 | } |
duke@435 | 453 | } |
duke@435 | 454 | |
duke@435 | 455 | DumpWriter::~DumpWriter() { |
duke@435 | 456 | // flush and close dump file |
coleenp@2463 | 457 | if (is_open()) { |
duke@435 | 458 | close(); |
duke@435 | 459 | } |
duke@435 | 460 | if (_buffer != NULL) os::free(_buffer); |
duke@435 | 461 | if (_error != NULL) os::free(_error); |
duke@435 | 462 | } |
duke@435 | 463 | |
duke@435 | 464 | // closes dump file (if open) |
duke@435 | 465 | void DumpWriter::close() { |
duke@435 | 466 | // flush and close dump file |
coleenp@2463 | 467 | if (is_open()) { |
duke@435 | 468 | flush(); |
duke@435 | 469 | ::close(file_descriptor()); |
coleenp@2463 | 470 | set_file_descriptor(-1); |
duke@435 | 471 | } |
duke@435 | 472 | } |
duke@435 | 473 | |
duke@435 | 474 | // write directly to the file |
duke@435 | 475 | void DumpWriter::write_internal(void* s, int len) { |
duke@435 | 476 | if (is_open()) { |
duke@435 | 477 | int n = ::write(file_descriptor(), s, len); |
duke@435 | 478 | if (n > 0) { |
duke@435 | 479 | _bytes_written += n; |
duke@435 | 480 | } |
duke@435 | 481 | if (n != len) { |
duke@435 | 482 | if (n < 0) { |
duke@435 | 483 | set_error(strerror(errno)); |
duke@435 | 484 | } else { |
duke@435 | 485 | set_error("file size limit"); |
duke@435 | 486 | } |
duke@435 | 487 | ::close(file_descriptor()); |
duke@435 | 488 | set_file_descriptor(-1); |
duke@435 | 489 | } |
duke@435 | 490 | } |
duke@435 | 491 | } |
duke@435 | 492 | |
duke@435 | 493 | // write raw bytes |
duke@435 | 494 | void DumpWriter::write_raw(void* s, int len) { |
duke@435 | 495 | if (is_open()) { |
duke@435 | 496 | // flush buffer to make toom |
duke@435 | 497 | if ((position()+ len) >= buffer_size()) { |
duke@435 | 498 | flush(); |
duke@435 | 499 | } |
duke@435 | 500 | |
duke@435 | 501 | // buffer not available or too big to buffer it |
duke@435 | 502 | if ((buffer() == NULL) || (len >= buffer_size())) { |
duke@435 | 503 | write_internal(s, len); |
duke@435 | 504 | } else { |
duke@435 | 505 | // Should optimize this for u1/u2/u4/u8 sizes. |
duke@435 | 506 | memcpy(buffer() + position(), s, len); |
duke@435 | 507 | set_position(position() + len); |
duke@435 | 508 | } |
duke@435 | 509 | } |
duke@435 | 510 | } |
duke@435 | 511 | |
duke@435 | 512 | // flush any buffered bytes to the file |
duke@435 | 513 | void DumpWriter::flush() { |
duke@435 | 514 | if (is_open() && position() > 0) { |
duke@435 | 515 | write_internal(buffer(), position()); |
duke@435 | 516 | set_position(0); |
duke@435 | 517 | } |
duke@435 | 518 | } |
duke@435 | 519 | |
duke@435 | 520 | |
duke@435 | 521 | jlong DumpWriter::current_offset() { |
duke@435 | 522 | if (is_open()) { |
duke@435 | 523 | // the offset is the file offset plus whatever we have buffered |
duke@435 | 524 | jlong offset = os::current_file_offset(file_descriptor()); |
duke@435 | 525 | assert(offset >= 0, "lseek failed"); |
duke@435 | 526 | return offset + (jlong)position(); |
duke@435 | 527 | } else { |
duke@435 | 528 | return (jlong)-1; |
duke@435 | 529 | } |
duke@435 | 530 | } |
duke@435 | 531 | |
duke@435 | 532 | void DumpWriter::seek_to_offset(jlong off) { |
duke@435 | 533 | assert(off >= 0, "bad offset"); |
duke@435 | 534 | |
duke@435 | 535 | // need to flush before seeking |
duke@435 | 536 | flush(); |
duke@435 | 537 | |
duke@435 | 538 | // may be closed due to I/O error |
duke@435 | 539 | if (is_open()) { |
duke@435 | 540 | jlong n = os::seek_to_file_offset(file_descriptor(), off); |
duke@435 | 541 | assert(n >= 0, "lseek failed"); |
duke@435 | 542 | } |
duke@435 | 543 | } |
duke@435 | 544 | |
duke@435 | 545 | void DumpWriter::write_u2(u2 x) { |
duke@435 | 546 | u2 v; |
duke@435 | 547 | Bytes::put_Java_u2((address)&v, x); |
duke@435 | 548 | write_raw((void*)&v, 2); |
duke@435 | 549 | } |
duke@435 | 550 | |
duke@435 | 551 | void DumpWriter::write_u4(u4 x) { |
duke@435 | 552 | u4 v; |
duke@435 | 553 | Bytes::put_Java_u4((address)&v, x); |
duke@435 | 554 | write_raw((void*)&v, 4); |
duke@435 | 555 | } |
duke@435 | 556 | |
duke@435 | 557 | void DumpWriter::write_u8(u8 x) { |
duke@435 | 558 | u8 v; |
duke@435 | 559 | Bytes::put_Java_u8((address)&v, x); |
duke@435 | 560 | write_raw((void*)&v, 8); |
duke@435 | 561 | } |
duke@435 | 562 | |
duke@435 | 563 | void DumpWriter::write_objectID(oop o) { |
duke@435 | 564 | address a = (address)((uintptr_t)o); |
duke@435 | 565 | #ifdef _LP64 |
duke@435 | 566 | write_u8((u8)a); |
duke@435 | 567 | #else |
duke@435 | 568 | write_u4((u4)a); |
duke@435 | 569 | #endif |
duke@435 | 570 | } |
duke@435 | 571 | |
coleenp@2497 | 572 | void DumpWriter::write_symbolID(Symbol* s) { |
coleenp@2497 | 573 | address a = (address)((uintptr_t)s); |
coleenp@2497 | 574 | #ifdef _LP64 |
coleenp@2497 | 575 | write_u8((u8)a); |
coleenp@2497 | 576 | #else |
coleenp@2497 | 577 | write_u4((u4)a); |
coleenp@2497 | 578 | #endif |
coleenp@2497 | 579 | } |
coleenp@2497 | 580 | |
mchung@831 | 581 | void DumpWriter::write_id(u4 x) { |
mchung@831 | 582 | #ifdef _LP64 |
mchung@831 | 583 | write_u8((u8) x); |
mchung@831 | 584 | #else |
mchung@831 | 585 | write_u4(x); |
mchung@831 | 586 | #endif |
mchung@831 | 587 | } |
mchung@831 | 588 | |
duke@435 | 589 | // We use java mirror as the class ID |
duke@435 | 590 | void DumpWriter::write_classID(Klass* k) { |
duke@435 | 591 | write_objectID(k->java_mirror()); |
duke@435 | 592 | } |
duke@435 | 593 | |
duke@435 | 594 | |
duke@435 | 595 | |
duke@435 | 596 | // Support class with a collection of functions used when dumping the heap |
duke@435 | 597 | |
duke@435 | 598 | class DumperSupport : AllStatic { |
duke@435 | 599 | public: |
duke@435 | 600 | |
duke@435 | 601 | // write a header of the given type |
duke@435 | 602 | static void write_header(DumpWriter* writer, hprofTag tag, u4 len); |
duke@435 | 603 | |
duke@435 | 604 | // returns hprof tag for the given type signature |
coleenp@2497 | 605 | static hprofTag sig2tag(Symbol* sig); |
duke@435 | 606 | // returns hprof tag for the given basic type |
duke@435 | 607 | static hprofTag type2tag(BasicType type); |
duke@435 | 608 | |
duke@435 | 609 | // returns the size of the instance of the given class |
duke@435 | 610 | static u4 instance_size(klassOop k); |
duke@435 | 611 | |
duke@435 | 612 | // dump a jfloat |
duke@435 | 613 | static void dump_float(DumpWriter* writer, jfloat f); |
duke@435 | 614 | // dump a jdouble |
duke@435 | 615 | static void dump_double(DumpWriter* writer, jdouble d); |
duke@435 | 616 | // dumps the raw value of the given field |
duke@435 | 617 | static void dump_field_value(DumpWriter* writer, char type, address addr); |
duke@435 | 618 | // dumps static fields of the given class |
duke@435 | 619 | static void dump_static_fields(DumpWriter* writer, klassOop k); |
duke@435 | 620 | // dump the raw values of the instance fields of the given object |
duke@435 | 621 | static void dump_instance_fields(DumpWriter* writer, oop o); |
duke@435 | 622 | // dumps the definition of the instance fields for a given class |
duke@435 | 623 | static void dump_instance_field_descriptors(DumpWriter* writer, klassOop k); |
duke@435 | 624 | // creates HPROF_GC_INSTANCE_DUMP record for the given object |
duke@435 | 625 | static void dump_instance(DumpWriter* writer, oop o); |
duke@435 | 626 | // creates HPROF_GC_CLASS_DUMP record for the given class and each of its |
duke@435 | 627 | // array classes |
duke@435 | 628 | static void dump_class_and_array_classes(DumpWriter* writer, klassOop k); |
duke@435 | 629 | // creates HPROF_GC_CLASS_DUMP record for a given primitive array |
duke@435 | 630 | // class (and each multi-dimensional array class too) |
duke@435 | 631 | static void dump_basic_type_array_class(DumpWriter* writer, klassOop k); |
duke@435 | 632 | |
duke@435 | 633 | // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array |
duke@435 | 634 | static void dump_object_array(DumpWriter* writer, objArrayOop array); |
duke@435 | 635 | // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array |
duke@435 | 636 | static void dump_prim_array(DumpWriter* writer, typeArrayOop array); |
mchung@831 | 637 | // create HPROF_FRAME record for the given method and bci |
mchung@831 | 638 | static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, methodOop m, int bci); |
duke@435 | 639 | }; |
duke@435 | 640 | |
duke@435 | 641 | // write a header of the given type |
duke@435 | 642 | void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { |
duke@435 | 643 | writer->write_u1((u1)tag); |
duke@435 | 644 | writer->write_u4(0); // current ticks |
duke@435 | 645 | writer->write_u4(len); |
duke@435 | 646 | } |
duke@435 | 647 | |
duke@435 | 648 | // returns hprof tag for the given type signature |
coleenp@2497 | 649 | hprofTag DumperSupport::sig2tag(Symbol* sig) { |
duke@435 | 650 | switch (sig->byte_at(0)) { |
duke@435 | 651 | case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; |
duke@435 | 652 | case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; |
duke@435 | 653 | case JVM_SIGNATURE_BYTE : return HPROF_BYTE; |
duke@435 | 654 | case JVM_SIGNATURE_CHAR : return HPROF_CHAR; |
duke@435 | 655 | case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; |
duke@435 | 656 | case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; |
duke@435 | 657 | case JVM_SIGNATURE_INT : return HPROF_INT; |
duke@435 | 658 | case JVM_SIGNATURE_LONG : return HPROF_LONG; |
duke@435 | 659 | case JVM_SIGNATURE_SHORT : return HPROF_SHORT; |
duke@435 | 660 | case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; |
duke@435 | 661 | default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; |
duke@435 | 662 | } |
duke@435 | 663 | } |
duke@435 | 664 | |
duke@435 | 665 | hprofTag DumperSupport::type2tag(BasicType type) { |
duke@435 | 666 | switch (type) { |
duke@435 | 667 | case T_BYTE : return HPROF_BYTE; |
duke@435 | 668 | case T_CHAR : return HPROF_CHAR; |
duke@435 | 669 | case T_FLOAT : return HPROF_FLOAT; |
duke@435 | 670 | case T_DOUBLE : return HPROF_DOUBLE; |
duke@435 | 671 | case T_INT : return HPROF_INT; |
duke@435 | 672 | case T_LONG : return HPROF_LONG; |
duke@435 | 673 | case T_SHORT : return HPROF_SHORT; |
duke@435 | 674 | case T_BOOLEAN : return HPROF_BOOLEAN; |
duke@435 | 675 | default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; |
duke@435 | 676 | } |
duke@435 | 677 | } |
duke@435 | 678 | |
duke@435 | 679 | // dump a jfloat |
duke@435 | 680 | void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { |
duke@435 | 681 | if (g_isnan(f)) { |
duke@435 | 682 | writer->write_u4(0x7fc00000); // collapsing NaNs |
duke@435 | 683 | } else { |
duke@435 | 684 | union { |
duke@435 | 685 | int i; |
duke@435 | 686 | float f; |
duke@435 | 687 | } u; |
duke@435 | 688 | u.f = (float)f; |
duke@435 | 689 | writer->write_u4((u4)u.i); |
duke@435 | 690 | } |
duke@435 | 691 | } |
duke@435 | 692 | |
duke@435 | 693 | // dump a jdouble |
duke@435 | 694 | void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { |
duke@435 | 695 | union { |
duke@435 | 696 | jlong l; |
duke@435 | 697 | double d; |
duke@435 | 698 | } u; |
duke@435 | 699 | if (g_isnan(d)) { // collapsing NaNs |
duke@435 | 700 | u.l = (jlong)(0x7ff80000); |
duke@435 | 701 | u.l = (u.l << 32); |
duke@435 | 702 | } else { |
duke@435 | 703 | u.d = (double)d; |
duke@435 | 704 | } |
duke@435 | 705 | writer->write_u8((u8)u.l); |
duke@435 | 706 | } |
duke@435 | 707 | |
duke@435 | 708 | // dumps the raw value of the given field |
duke@435 | 709 | void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { |
duke@435 | 710 | switch (type) { |
duke@435 | 711 | case JVM_SIGNATURE_CLASS : |
duke@435 | 712 | case JVM_SIGNATURE_ARRAY : { |
coleenp@548 | 713 | oop o; |
coleenp@548 | 714 | if (UseCompressedOops) { |
coleenp@548 | 715 | o = oopDesc::load_decode_heap_oop((narrowOop*)addr); |
coleenp@548 | 716 | } else { |
coleenp@548 | 717 | o = oopDesc::load_decode_heap_oop((oop*)addr); |
coleenp@548 | 718 | } |
duke@435 | 719 | |
duke@435 | 720 | // reflection and sun.misc.Unsafe classes may have a reference to a |
duke@435 | 721 | // klassOop so filter it out. |
duke@435 | 722 | if (o != NULL && o->is_klass()) { |
duke@435 | 723 | o = NULL; |
duke@435 | 724 | } |
duke@435 | 725 | |
duke@435 | 726 | // FIXME: When sharing is enabled we don't emit field references to objects |
duke@435 | 727 | // in shared spaces. We can remove this once we write records for the classes |
duke@435 | 728 | // and strings that are shared. |
duke@435 | 729 | if (o != NULL && o->is_shared()) { |
duke@435 | 730 | o = NULL; |
duke@435 | 731 | } |
duke@435 | 732 | writer->write_objectID(o); |
duke@435 | 733 | break; |
duke@435 | 734 | } |
duke@435 | 735 | case JVM_SIGNATURE_BYTE : { |
duke@435 | 736 | jbyte* b = (jbyte*)addr; |
duke@435 | 737 | writer->write_u1((u1)*b); |
duke@435 | 738 | break; |
duke@435 | 739 | } |
duke@435 | 740 | case JVM_SIGNATURE_CHAR : { |
duke@435 | 741 | jchar* c = (jchar*)addr; |
duke@435 | 742 | writer->write_u2((u2)*c); |
duke@435 | 743 | break; |
duke@435 | 744 | } |
duke@435 | 745 | case JVM_SIGNATURE_SHORT : { |
duke@435 | 746 | jshort* s = (jshort*)addr; |
duke@435 | 747 | writer->write_u2((u2)*s); |
duke@435 | 748 | break; |
duke@435 | 749 | } |
duke@435 | 750 | case JVM_SIGNATURE_FLOAT : { |
duke@435 | 751 | jfloat* f = (jfloat*)addr; |
duke@435 | 752 | dump_float(writer, *f); |
duke@435 | 753 | break; |
duke@435 | 754 | } |
duke@435 | 755 | case JVM_SIGNATURE_DOUBLE : { |
duke@435 | 756 | jdouble* f = (jdouble*)addr; |
duke@435 | 757 | dump_double(writer, *f); |
duke@435 | 758 | break; |
duke@435 | 759 | } |
duke@435 | 760 | case JVM_SIGNATURE_INT : { |
duke@435 | 761 | jint* i = (jint*)addr; |
duke@435 | 762 | writer->write_u4((u4)*i); |
duke@435 | 763 | break; |
duke@435 | 764 | } |
duke@435 | 765 | case JVM_SIGNATURE_LONG : { |
duke@435 | 766 | jlong* l = (jlong*)addr; |
duke@435 | 767 | writer->write_u8((u8)*l); |
duke@435 | 768 | break; |
duke@435 | 769 | } |
duke@435 | 770 | case JVM_SIGNATURE_BOOLEAN : { |
duke@435 | 771 | jboolean* b = (jboolean*)addr; |
duke@435 | 772 | writer->write_u1((u1)*b); |
duke@435 | 773 | break; |
duke@435 | 774 | } |
duke@435 | 775 | default : ShouldNotReachHere(); |
duke@435 | 776 | } |
duke@435 | 777 | } |
duke@435 | 778 | |
duke@435 | 779 | // returns the size of the instance of the given class |
duke@435 | 780 | u4 DumperSupport::instance_size(klassOop k) { |
duke@435 | 781 | HandleMark hm; |
duke@435 | 782 | instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); |
duke@435 | 783 | |
duke@435 | 784 | int size = 0; |
duke@435 | 785 | |
duke@435 | 786 | for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { |
duke@435 | 787 | if (!fld.access_flags().is_static()) { |
coleenp@2497 | 788 | Symbol* sig = fld.signature(); |
duke@435 | 789 | switch (sig->byte_at(0)) { |
duke@435 | 790 | case JVM_SIGNATURE_CLASS : |
duke@435 | 791 | case JVM_SIGNATURE_ARRAY : size += oopSize; break; |
duke@435 | 792 | |
duke@435 | 793 | case JVM_SIGNATURE_BYTE : |
duke@435 | 794 | case JVM_SIGNATURE_BOOLEAN : size += 1; break; |
duke@435 | 795 | |
duke@435 | 796 | case JVM_SIGNATURE_CHAR : |
duke@435 | 797 | case JVM_SIGNATURE_SHORT : size += 2; break; |
duke@435 | 798 | |
duke@435 | 799 | case JVM_SIGNATURE_INT : |
duke@435 | 800 | case JVM_SIGNATURE_FLOAT : size += 4; break; |
duke@435 | 801 | |
duke@435 | 802 | case JVM_SIGNATURE_LONG : |
duke@435 | 803 | case JVM_SIGNATURE_DOUBLE : size += 8; break; |
duke@435 | 804 | |
duke@435 | 805 | default : ShouldNotReachHere(); |
duke@435 | 806 | } |
duke@435 | 807 | } |
duke@435 | 808 | } |
duke@435 | 809 | return (u4)size; |
duke@435 | 810 | } |
duke@435 | 811 | |
duke@435 | 812 | // dumps static fields of the given class |
duke@435 | 813 | void DumperSupport::dump_static_fields(DumpWriter* writer, klassOop k) { |
duke@435 | 814 | HandleMark hm; |
duke@435 | 815 | instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); |
duke@435 | 816 | |
duke@435 | 817 | // pass 1 - count the static fields |
duke@435 | 818 | u2 field_count = 0; |
duke@435 | 819 | for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { |
duke@435 | 820 | if (fldc.access_flags().is_static()) field_count++; |
duke@435 | 821 | } |
duke@435 | 822 | |
duke@435 | 823 | writer->write_u2(field_count); |
duke@435 | 824 | |
duke@435 | 825 | // pass 2 - dump the field descriptors and raw values |
duke@435 | 826 | for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { |
duke@435 | 827 | if (fld.access_flags().is_static()) { |
coleenp@2497 | 828 | Symbol* sig = fld.signature(); |
duke@435 | 829 | |
coleenp@2497 | 830 | writer->write_symbolID(fld.name()); // name |
duke@435 | 831 | writer->write_u1(sig2tag(sig)); // type |
duke@435 | 832 | |
duke@435 | 833 | // value |
duke@435 | 834 | int offset = fld.offset(); |
duke@435 | 835 | address addr = (address)k + offset; |
duke@435 | 836 | |
duke@435 | 837 | dump_field_value(writer, sig->byte_at(0), addr); |
duke@435 | 838 | } |
duke@435 | 839 | } |
duke@435 | 840 | } |
duke@435 | 841 | |
duke@435 | 842 | // dump the raw values of the instance fields of the given object |
duke@435 | 843 | void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { |
duke@435 | 844 | HandleMark hm; |
duke@435 | 845 | instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); |
duke@435 | 846 | |
duke@435 | 847 | for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { |
duke@435 | 848 | if (!fld.access_flags().is_static()) { |
coleenp@2497 | 849 | Symbol* sig = fld.signature(); |
duke@435 | 850 | address addr = (address)o + fld.offset(); |
duke@435 | 851 | |
duke@435 | 852 | dump_field_value(writer, sig->byte_at(0), addr); |
duke@435 | 853 | } |
duke@435 | 854 | } |
duke@435 | 855 | } |
duke@435 | 856 | |
duke@435 | 857 | // dumps the definition of the instance fields for a given class |
duke@435 | 858 | void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, klassOop k) { |
duke@435 | 859 | HandleMark hm; |
duke@435 | 860 | instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); |
duke@435 | 861 | |
duke@435 | 862 | // pass 1 - count the instance fields |
duke@435 | 863 | u2 field_count = 0; |
duke@435 | 864 | for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { |
duke@435 | 865 | if (!fldc.access_flags().is_static()) field_count++; |
duke@435 | 866 | } |
duke@435 | 867 | |
duke@435 | 868 | writer->write_u2(field_count); |
duke@435 | 869 | |
duke@435 | 870 | // pass 2 - dump the field descriptors |
duke@435 | 871 | for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { |
duke@435 | 872 | if (!fld.access_flags().is_static()) { |
coleenp@2497 | 873 | Symbol* sig = fld.signature(); |
duke@435 | 874 | |
coleenp@2497 | 875 | writer->write_symbolID(fld.name()); // name |
duke@435 | 876 | writer->write_u1(sig2tag(sig)); // type |
duke@435 | 877 | } |
duke@435 | 878 | } |
duke@435 | 879 | } |
duke@435 | 880 | |
duke@435 | 881 | // creates HPROF_GC_INSTANCE_DUMP record for the given object |
duke@435 | 882 | void DumperSupport::dump_instance(DumpWriter* writer, oop o) { |
duke@435 | 883 | klassOop k = o->klass(); |
duke@435 | 884 | |
duke@435 | 885 | writer->write_u1(HPROF_GC_INSTANCE_DUMP); |
duke@435 | 886 | writer->write_objectID(o); |
duke@435 | 887 | writer->write_u4(STACK_TRACE_ID); |
duke@435 | 888 | |
duke@435 | 889 | // class ID |
duke@435 | 890 | writer->write_classID(Klass::cast(k)); |
duke@435 | 891 | |
duke@435 | 892 | // number of bytes that follow |
duke@435 | 893 | writer->write_u4(instance_size(k) ); |
duke@435 | 894 | |
duke@435 | 895 | // field values |
duke@435 | 896 | dump_instance_fields(writer, o); |
duke@435 | 897 | } |
duke@435 | 898 | |
duke@435 | 899 | // creates HPROF_GC_CLASS_DUMP record for the given class and each of |
duke@435 | 900 | // its array classes |
duke@435 | 901 | void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, klassOop k) { |
duke@435 | 902 | Klass* klass = Klass::cast(k); |
duke@435 | 903 | assert(klass->oop_is_instance(), "not an instanceKlass"); |
duke@435 | 904 | instanceKlass* ik = (instanceKlass*)klass; |
duke@435 | 905 | |
duke@435 | 906 | writer->write_u1(HPROF_GC_CLASS_DUMP); |
duke@435 | 907 | |
duke@435 | 908 | // class ID |
duke@435 | 909 | writer->write_classID(ik); |
duke@435 | 910 | writer->write_u4(STACK_TRACE_ID); |
duke@435 | 911 | |
duke@435 | 912 | // super class ID |
duke@435 | 913 | klassOop java_super = ik->java_super(); |
duke@435 | 914 | if (java_super == NULL) { |
duke@435 | 915 | writer->write_objectID(NULL); |
duke@435 | 916 | } else { |
duke@435 | 917 | writer->write_classID(Klass::cast(java_super)); |
duke@435 | 918 | } |
duke@435 | 919 | |
duke@435 | 920 | writer->write_objectID(ik->class_loader()); |
duke@435 | 921 | writer->write_objectID(ik->signers()); |
duke@435 | 922 | writer->write_objectID(ik->protection_domain()); |
duke@435 | 923 | |
duke@435 | 924 | // reserved |
duke@435 | 925 | writer->write_objectID(NULL); |
duke@435 | 926 | writer->write_objectID(NULL); |
duke@435 | 927 | |
duke@435 | 928 | // instance size |
duke@435 | 929 | writer->write_u4(DumperSupport::instance_size(k)); |
duke@435 | 930 | |
duke@435 | 931 | // size of constant pool - ignored by HAT 1.1 |
duke@435 | 932 | writer->write_u2(0); |
duke@435 | 933 | |
duke@435 | 934 | // number of static fields |
duke@435 | 935 | dump_static_fields(writer, k); |
duke@435 | 936 | |
duke@435 | 937 | // description of instance fields |
duke@435 | 938 | dump_instance_field_descriptors(writer, k); |
duke@435 | 939 | |
duke@435 | 940 | // array classes |
duke@435 | 941 | k = klass->array_klass_or_null(); |
duke@435 | 942 | while (k != NULL) { |
duke@435 | 943 | Klass* klass = Klass::cast(k); |
duke@435 | 944 | assert(klass->oop_is_objArray(), "not an objArrayKlass"); |
duke@435 | 945 | |
duke@435 | 946 | writer->write_u1(HPROF_GC_CLASS_DUMP); |
duke@435 | 947 | writer->write_classID(klass); |
duke@435 | 948 | writer->write_u4(STACK_TRACE_ID); |
duke@435 | 949 | |
duke@435 | 950 | // super class of array classes is java.lang.Object |
duke@435 | 951 | java_super = klass->java_super(); |
duke@435 | 952 | assert(java_super != NULL, "checking"); |
duke@435 | 953 | writer->write_classID(Klass::cast(java_super)); |
duke@435 | 954 | |
duke@435 | 955 | writer->write_objectID(ik->class_loader()); |
duke@435 | 956 | writer->write_objectID(ik->signers()); |
duke@435 | 957 | writer->write_objectID(ik->protection_domain()); |
duke@435 | 958 | |
duke@435 | 959 | writer->write_objectID(NULL); // reserved |
duke@435 | 960 | writer->write_objectID(NULL); |
duke@435 | 961 | writer->write_u4(0); // instance size |
duke@435 | 962 | writer->write_u2(0); // constant pool |
duke@435 | 963 | writer->write_u2(0); // static fields |
duke@435 | 964 | writer->write_u2(0); // instance fields |
duke@435 | 965 | |
duke@435 | 966 | // get the array class for the next rank |
duke@435 | 967 | k = klass->array_klass_or_null(); |
duke@435 | 968 | } |
duke@435 | 969 | } |
duke@435 | 970 | |
duke@435 | 971 | // creates HPROF_GC_CLASS_DUMP record for a given primitive array |
duke@435 | 972 | // class (and each multi-dimensional array class too) |
duke@435 | 973 | void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, klassOop k) { |
duke@435 | 974 | // array classes |
duke@435 | 975 | while (k != NULL) { |
duke@435 | 976 | Klass* klass = Klass::cast(k); |
duke@435 | 977 | |
duke@435 | 978 | writer->write_u1(HPROF_GC_CLASS_DUMP); |
duke@435 | 979 | writer->write_classID(klass); |
duke@435 | 980 | writer->write_u4(STACK_TRACE_ID); |
duke@435 | 981 | |
duke@435 | 982 | // super class of array classes is java.lang.Object |
duke@435 | 983 | klassOop java_super = klass->java_super(); |
duke@435 | 984 | assert(java_super != NULL, "checking"); |
duke@435 | 985 | writer->write_classID(Klass::cast(java_super)); |
duke@435 | 986 | |
duke@435 | 987 | writer->write_objectID(NULL); // loader |
duke@435 | 988 | writer->write_objectID(NULL); // signers |
duke@435 | 989 | writer->write_objectID(NULL); // protection domain |
duke@435 | 990 | |
duke@435 | 991 | writer->write_objectID(NULL); // reserved |
duke@435 | 992 | writer->write_objectID(NULL); |
duke@435 | 993 | writer->write_u4(0); // instance size |
duke@435 | 994 | writer->write_u2(0); // constant pool |
duke@435 | 995 | writer->write_u2(0); // static fields |
duke@435 | 996 | writer->write_u2(0); // instance fields |
duke@435 | 997 | |
duke@435 | 998 | // get the array class for the next rank |
duke@435 | 999 | k = klass->array_klass_or_null(); |
duke@435 | 1000 | } |
duke@435 | 1001 | } |
duke@435 | 1002 | |
duke@435 | 1003 | // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array |
duke@435 | 1004 | void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { |
duke@435 | 1005 | |
duke@435 | 1006 | // filter this |
duke@435 | 1007 | if (array->klass() == Universe::systemObjArrayKlassObj()) return; |
duke@435 | 1008 | |
duke@435 | 1009 | writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); |
duke@435 | 1010 | writer->write_objectID(array); |
duke@435 | 1011 | writer->write_u4(STACK_TRACE_ID); |
duke@435 | 1012 | writer->write_u4((u4)array->length()); |
duke@435 | 1013 | |
duke@435 | 1014 | // array class ID |
duke@435 | 1015 | writer->write_classID(Klass::cast(array->klass())); |
duke@435 | 1016 | |
duke@435 | 1017 | // [id]* elements |
duke@435 | 1018 | for (int index=0; index<array->length(); index++) { |
duke@435 | 1019 | oop o = array->obj_at(index); |
duke@435 | 1020 | writer->write_objectID(o); |
duke@435 | 1021 | } |
duke@435 | 1022 | } |
duke@435 | 1023 | |
duke@435 | 1024 | #define WRITE_ARRAY(Array, Type, Size) \ |
duke@435 | 1025 | for (int i=0; i<Array->length(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } |
duke@435 | 1026 | |
duke@435 | 1027 | |
duke@435 | 1028 | // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array |
duke@435 | 1029 | void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { |
duke@435 | 1030 | BasicType type = typeArrayKlass::cast(array->klass())->element_type(); |
duke@435 | 1031 | |
duke@435 | 1032 | writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); |
duke@435 | 1033 | writer->write_objectID(array); |
duke@435 | 1034 | writer->write_u4(STACK_TRACE_ID); |
duke@435 | 1035 | writer->write_u4((u4)array->length()); |
duke@435 | 1036 | writer->write_u1(type2tag(type)); |
duke@435 | 1037 | |
duke@435 | 1038 | // nothing to copy |
duke@435 | 1039 | if (array->length() == 0) { |
duke@435 | 1040 | return; |
duke@435 | 1041 | } |
duke@435 | 1042 | |
duke@435 | 1043 | // If the byte ordering is big endian then we can copy most types directly |
kvn@464 | 1044 | int length_in_bytes = array->length() * type2aelembytes(type); |
duke@435 | 1045 | assert(length_in_bytes > 0, "nothing to copy"); |
duke@435 | 1046 | |
duke@435 | 1047 | switch (type) { |
duke@435 | 1048 | case T_INT : { |
duke@435 | 1049 | if (Bytes::is_Java_byte_ordering_different()) { |
duke@435 | 1050 | WRITE_ARRAY(array, int, u4); |
duke@435 | 1051 | } else { |
duke@435 | 1052 | writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); |
duke@435 | 1053 | } |
duke@435 | 1054 | break; |
duke@435 | 1055 | } |
duke@435 | 1056 | case T_BYTE : { |
duke@435 | 1057 | writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); |
duke@435 | 1058 | break; |
duke@435 | 1059 | } |
duke@435 | 1060 | case T_CHAR : { |
duke@435 | 1061 | if (Bytes::is_Java_byte_ordering_different()) { |
duke@435 | 1062 | WRITE_ARRAY(array, char, u2); |
duke@435 | 1063 | } else { |
duke@435 | 1064 | writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); |
duke@435 | 1065 | } |
duke@435 | 1066 | break; |
duke@435 | 1067 | } |
duke@435 | 1068 | case T_SHORT : { |
duke@435 | 1069 | if (Bytes::is_Java_byte_ordering_different()) { |
duke@435 | 1070 | WRITE_ARRAY(array, short, u2); |
duke@435 | 1071 | } else { |
duke@435 | 1072 | writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); |
duke@435 | 1073 | } |
duke@435 | 1074 | break; |
duke@435 | 1075 | } |
duke@435 | 1076 | case T_BOOLEAN : { |
duke@435 | 1077 | if (Bytes::is_Java_byte_ordering_different()) { |
duke@435 | 1078 | WRITE_ARRAY(array, bool, u1); |
duke@435 | 1079 | } else { |
duke@435 | 1080 | writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); |
duke@435 | 1081 | } |
duke@435 | 1082 | break; |
duke@435 | 1083 | } |
duke@435 | 1084 | case T_LONG : { |
duke@435 | 1085 | if (Bytes::is_Java_byte_ordering_different()) { |
duke@435 | 1086 | WRITE_ARRAY(array, long, u8); |
duke@435 | 1087 | } else { |
duke@435 | 1088 | writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); |
duke@435 | 1089 | } |
duke@435 | 1090 | break; |
duke@435 | 1091 | } |
duke@435 | 1092 | |
duke@435 | 1093 | // handle float/doubles in a special value to ensure than NaNs are |
duke@435 | 1094 | // written correctly. TO DO: Check if we can avoid this on processors that |
duke@435 | 1095 | // use IEEE 754. |
duke@435 | 1096 | |
duke@435 | 1097 | case T_FLOAT : { |
duke@435 | 1098 | for (int i=0; i<array->length(); i++) { |
duke@435 | 1099 | dump_float( writer, array->float_at(i) ); |
duke@435 | 1100 | } |
duke@435 | 1101 | break; |
duke@435 | 1102 | } |
duke@435 | 1103 | case T_DOUBLE : { |
duke@435 | 1104 | for (int i=0; i<array->length(); i++) { |
duke@435 | 1105 | dump_double( writer, array->double_at(i) ); |
duke@435 | 1106 | } |
duke@435 | 1107 | break; |
duke@435 | 1108 | } |
duke@435 | 1109 | default : ShouldNotReachHere(); |
duke@435 | 1110 | } |
duke@435 | 1111 | } |
duke@435 | 1112 | |
mchung@831 | 1113 | // create a HPROF_FRAME record of the given methodOop and bci |
mchung@831 | 1114 | void DumperSupport::dump_stack_frame(DumpWriter* writer, |
mchung@831 | 1115 | int frame_serial_num, |
mchung@831 | 1116 | int class_serial_num, |
mchung@831 | 1117 | methodOop m, |
mchung@831 | 1118 | int bci) { |
mchung@831 | 1119 | int line_number; |
mchung@831 | 1120 | if (m->is_native()) { |
mchung@831 | 1121 | line_number = -3; // native frame |
mchung@831 | 1122 | } else { |
mchung@831 | 1123 | line_number = m->line_number_from_bci(bci); |
mchung@831 | 1124 | } |
mchung@831 | 1125 | |
mchung@831 | 1126 | write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); |
mchung@831 | 1127 | writer->write_id(frame_serial_num); // frame serial number |
coleenp@2497 | 1128 | writer->write_symbolID(m->name()); // method's name |
coleenp@2497 | 1129 | writer->write_symbolID(m->signature()); // method's signature |
mchung@831 | 1130 | |
mchung@831 | 1131 | assert(Klass::cast(m->method_holder())->oop_is_instance(), "not instanceKlass"); |
coleenp@2497 | 1132 | writer->write_symbolID(instanceKlass::cast(m->method_holder())->source_file_name()); // source file name |
mchung@831 | 1133 | writer->write_u4(class_serial_num); // class serial number |
mchung@831 | 1134 | writer->write_u4((u4) line_number); // line number |
mchung@831 | 1135 | } |
duke@435 | 1136 | |
coleenp@2497 | 1137 | |
duke@435 | 1138 | // Support class used to generate HPROF_UTF8 records from the entries in the |
duke@435 | 1139 | // SymbolTable. |
duke@435 | 1140 | |
coleenp@2497 | 1141 | class SymbolTableDumper : public SymbolClosure { |
duke@435 | 1142 | private: |
duke@435 | 1143 | DumpWriter* _writer; |
duke@435 | 1144 | DumpWriter* writer() const { return _writer; } |
duke@435 | 1145 | public: |
duke@435 | 1146 | SymbolTableDumper(DumpWriter* writer) { _writer = writer; } |
coleenp@2497 | 1147 | void do_symbol(Symbol** p); |
duke@435 | 1148 | }; |
duke@435 | 1149 | |
coleenp@2497 | 1150 | void SymbolTableDumper::do_symbol(Symbol** p) { |
duke@435 | 1151 | ResourceMark rm; |
coleenp@2497 | 1152 | Symbol* sym = load_symbol(p); |
duke@435 | 1153 | int len = sym->utf8_length(); |
duke@435 | 1154 | if (len > 0) { |
duke@435 | 1155 | char* s = sym->as_utf8(); |
duke@435 | 1156 | DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); |
coleenp@2497 | 1157 | writer()->write_symbolID(sym); |
duke@435 | 1158 | writer()->write_raw(s, len); |
duke@435 | 1159 | } |
duke@435 | 1160 | } |
duke@435 | 1161 | |
duke@435 | 1162 | // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records |
duke@435 | 1163 | |
duke@435 | 1164 | class JNILocalsDumper : public OopClosure { |
duke@435 | 1165 | private: |
duke@435 | 1166 | DumpWriter* _writer; |
duke@435 | 1167 | u4 _thread_serial_num; |
mchung@831 | 1168 | int _frame_num; |
duke@435 | 1169 | DumpWriter* writer() const { return _writer; } |
duke@435 | 1170 | public: |
duke@435 | 1171 | JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { |
duke@435 | 1172 | _writer = writer; |
duke@435 | 1173 | _thread_serial_num = thread_serial_num; |
mchung@831 | 1174 | _frame_num = -1; // default - empty stack |
duke@435 | 1175 | } |
mchung@831 | 1176 | void set_frame_number(int n) { _frame_num = n; } |
duke@435 | 1177 | void do_oop(oop* obj_p); |
coleenp@548 | 1178 | void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
duke@435 | 1179 | }; |
duke@435 | 1180 | |
duke@435 | 1181 | |
duke@435 | 1182 | void JNILocalsDumper::do_oop(oop* obj_p) { |
duke@435 | 1183 | // ignore null or deleted handles |
duke@435 | 1184 | oop o = *obj_p; |
duke@435 | 1185 | if (o != NULL && o != JNIHandles::deleted_handle()) { |
duke@435 | 1186 | writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); |
duke@435 | 1187 | writer()->write_objectID(o); |
duke@435 | 1188 | writer()->write_u4(_thread_serial_num); |
mchung@831 | 1189 | writer()->write_u4((u4)_frame_num); |
duke@435 | 1190 | } |
duke@435 | 1191 | } |
duke@435 | 1192 | |
duke@435 | 1193 | |
duke@435 | 1194 | // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records |
duke@435 | 1195 | |
duke@435 | 1196 | class JNIGlobalsDumper : public OopClosure { |
duke@435 | 1197 | private: |
duke@435 | 1198 | DumpWriter* _writer; |
duke@435 | 1199 | DumpWriter* writer() const { return _writer; } |
duke@435 | 1200 | |
duke@435 | 1201 | public: |
duke@435 | 1202 | JNIGlobalsDumper(DumpWriter* writer) { |
duke@435 | 1203 | _writer = writer; |
duke@435 | 1204 | } |
duke@435 | 1205 | void do_oop(oop* obj_p); |
coleenp@548 | 1206 | void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
duke@435 | 1207 | }; |
duke@435 | 1208 | |
duke@435 | 1209 | void JNIGlobalsDumper::do_oop(oop* obj_p) { |
duke@435 | 1210 | oop o = *obj_p; |
duke@435 | 1211 | |
duke@435 | 1212 | // ignore these |
duke@435 | 1213 | if (o == NULL || o == JNIHandles::deleted_handle()) return; |
duke@435 | 1214 | |
duke@435 | 1215 | // we ignore global ref to symbols and other internal objects |
duke@435 | 1216 | if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { |
duke@435 | 1217 | writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); |
duke@435 | 1218 | writer()->write_objectID(o); |
duke@435 | 1219 | writer()->write_objectID((oopDesc*)obj_p); // global ref ID |
duke@435 | 1220 | } |
duke@435 | 1221 | }; |
duke@435 | 1222 | |
duke@435 | 1223 | |
duke@435 | 1224 | // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records |
duke@435 | 1225 | |
duke@435 | 1226 | class MonitorUsedDumper : public OopClosure { |
duke@435 | 1227 | private: |
duke@435 | 1228 | DumpWriter* _writer; |
duke@435 | 1229 | DumpWriter* writer() const { return _writer; } |
duke@435 | 1230 | public: |
duke@435 | 1231 | MonitorUsedDumper(DumpWriter* writer) { |
duke@435 | 1232 | _writer = writer; |
duke@435 | 1233 | } |
duke@435 | 1234 | void do_oop(oop* obj_p) { |
duke@435 | 1235 | writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); |
duke@435 | 1236 | writer()->write_objectID(*obj_p); |
duke@435 | 1237 | } |
coleenp@548 | 1238 | void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
duke@435 | 1239 | }; |
duke@435 | 1240 | |
duke@435 | 1241 | |
duke@435 | 1242 | // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records |
duke@435 | 1243 | |
duke@435 | 1244 | class StickyClassDumper : public OopClosure { |
duke@435 | 1245 | private: |
duke@435 | 1246 | DumpWriter* _writer; |
duke@435 | 1247 | DumpWriter* writer() const { return _writer; } |
duke@435 | 1248 | public: |
duke@435 | 1249 | StickyClassDumper(DumpWriter* writer) { |
duke@435 | 1250 | _writer = writer; |
duke@435 | 1251 | } |
duke@435 | 1252 | void do_oop(oop* obj_p); |
coleenp@548 | 1253 | void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
duke@435 | 1254 | }; |
duke@435 | 1255 | |
duke@435 | 1256 | void StickyClassDumper::do_oop(oop* obj_p) { |
duke@435 | 1257 | if (*obj_p != NULL) { |
duke@435 | 1258 | oop o = *obj_p; |
duke@435 | 1259 | if (o->is_klass()) { |
duke@435 | 1260 | klassOop k = klassOop(o); |
duke@435 | 1261 | if (Klass::cast(k)->oop_is_instance()) { |
duke@435 | 1262 | instanceKlass* ik = instanceKlass::cast(k); |
duke@435 | 1263 | writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); |
duke@435 | 1264 | writer()->write_classID(ik); |
duke@435 | 1265 | } |
duke@435 | 1266 | } |
duke@435 | 1267 | } |
duke@435 | 1268 | } |
duke@435 | 1269 | |
duke@435 | 1270 | |
duke@435 | 1271 | class VM_HeapDumper; |
duke@435 | 1272 | |
duke@435 | 1273 | // Support class using when iterating over the heap. |
duke@435 | 1274 | |
duke@435 | 1275 | class HeapObjectDumper : public ObjectClosure { |
duke@435 | 1276 | private: |
duke@435 | 1277 | VM_HeapDumper* _dumper; |
duke@435 | 1278 | DumpWriter* _writer; |
duke@435 | 1279 | |
duke@435 | 1280 | VM_HeapDumper* dumper() { return _dumper; } |
duke@435 | 1281 | DumpWriter* writer() { return _writer; } |
duke@435 | 1282 | |
duke@435 | 1283 | // used to indicate that a record has been writen |
duke@435 | 1284 | void mark_end_of_record(); |
duke@435 | 1285 | |
duke@435 | 1286 | public: |
duke@435 | 1287 | HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { |
duke@435 | 1288 | _dumper = dumper; |
duke@435 | 1289 | _writer = writer; |
duke@435 | 1290 | } |
duke@435 | 1291 | |
duke@435 | 1292 | // called for each object in the heap |
duke@435 | 1293 | void do_object(oop o); |
duke@435 | 1294 | }; |
duke@435 | 1295 | |
duke@435 | 1296 | void HeapObjectDumper::do_object(oop o) { |
duke@435 | 1297 | // hide the sentinel for deleted handles |
duke@435 | 1298 | if (o == JNIHandles::deleted_handle()) return; |
duke@435 | 1299 | |
duke@435 | 1300 | // ignore KlassKlass objects |
duke@435 | 1301 | if (o->is_klass()) return; |
duke@435 | 1302 | |
duke@435 | 1303 | // skip classes as these emitted as HPROF_GC_CLASS_DUMP records |
never@1577 | 1304 | if (o->klass() == SystemDictionary::Class_klass()) { |
duke@435 | 1305 | if (!java_lang_Class::is_primitive(o)) { |
duke@435 | 1306 | return; |
duke@435 | 1307 | } |
duke@435 | 1308 | } |
duke@435 | 1309 | |
duke@435 | 1310 | // create a HPROF_GC_INSTANCE record for each object |
duke@435 | 1311 | if (o->is_instance()) { |
duke@435 | 1312 | DumperSupport::dump_instance(writer(), o); |
duke@435 | 1313 | mark_end_of_record(); |
duke@435 | 1314 | } else { |
duke@435 | 1315 | // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array |
duke@435 | 1316 | if (o->is_objArray()) { |
duke@435 | 1317 | DumperSupport::dump_object_array(writer(), objArrayOop(o)); |
duke@435 | 1318 | mark_end_of_record(); |
duke@435 | 1319 | } else { |
duke@435 | 1320 | // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array |
duke@435 | 1321 | if (o->is_typeArray()) { |
duke@435 | 1322 | DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); |
duke@435 | 1323 | mark_end_of_record(); |
duke@435 | 1324 | } |
duke@435 | 1325 | } |
duke@435 | 1326 | } |
duke@435 | 1327 | } |
duke@435 | 1328 | |
duke@435 | 1329 | // The VM operation that performs the heap dump |
duke@435 | 1330 | class VM_HeapDumper : public VM_GC_Operation { |
duke@435 | 1331 | private: |
ysr@1050 | 1332 | static VM_HeapDumper* _global_dumper; |
ysr@1050 | 1333 | static DumpWriter* _global_writer; |
ysr@1050 | 1334 | DumpWriter* _local_writer; |
thurka@2130 | 1335 | JavaThread* _oome_thread; |
thurka@2130 | 1336 | methodOop _oome_constructor; |
duke@435 | 1337 | bool _gc_before_heap_dump; |
duke@435 | 1338 | bool _is_segmented_dump; |
duke@435 | 1339 | jlong _dump_start; |
mchung@831 | 1340 | GrowableArray<Klass*>* _klass_map; |
mchung@831 | 1341 | ThreadStackTrace** _stack_traces; |
mchung@831 | 1342 | int _num_threads; |
duke@435 | 1343 | |
ysr@1050 | 1344 | // accessors and setters |
ysr@1050 | 1345 | static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } |
ysr@1050 | 1346 | static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } |
ysr@1050 | 1347 | void set_global_dumper() { |
ysr@1050 | 1348 | assert(_global_dumper == NULL, "Error"); |
ysr@1050 | 1349 | _global_dumper = this; |
ysr@1050 | 1350 | } |
ysr@1050 | 1351 | void set_global_writer() { |
ysr@1050 | 1352 | assert(_global_writer == NULL, "Error"); |
ysr@1050 | 1353 | _global_writer = _local_writer; |
ysr@1050 | 1354 | } |
ysr@1050 | 1355 | void clear_global_dumper() { _global_dumper = NULL; } |
ysr@1050 | 1356 | void clear_global_writer() { _global_writer = NULL; } |
ysr@1050 | 1357 | |
duke@435 | 1358 | bool is_segmented_dump() const { return _is_segmented_dump; } |
duke@435 | 1359 | void set_segmented_dump() { _is_segmented_dump = true; } |
duke@435 | 1360 | jlong dump_start() const { return _dump_start; } |
duke@435 | 1361 | void set_dump_start(jlong pos); |
duke@435 | 1362 | |
duke@435 | 1363 | bool skip_operation() const; |
duke@435 | 1364 | |
duke@435 | 1365 | // writes a HPROF_LOAD_CLASS record |
duke@435 | 1366 | static void do_load_class(klassOop k); |
duke@435 | 1367 | |
duke@435 | 1368 | // writes a HPROF_GC_CLASS_DUMP record for the given class |
duke@435 | 1369 | // (and each array class too) |
duke@435 | 1370 | static void do_class_dump(klassOop k); |
duke@435 | 1371 | |
duke@435 | 1372 | // writes a HPROF_GC_CLASS_DUMP records for a given basic type |
duke@435 | 1373 | // array (and each multi-dimensional array too) |
duke@435 | 1374 | static void do_basic_type_array_class_dump(klassOop k); |
duke@435 | 1375 | |
duke@435 | 1376 | // HPROF_GC_ROOT_THREAD_OBJ records |
mchung@831 | 1377 | int do_thread(JavaThread* thread, u4 thread_serial_num); |
duke@435 | 1378 | void do_threads(); |
duke@435 | 1379 | |
mchung@831 | 1380 | void add_class_serial_number(Klass* k, int serial_num) { |
mchung@831 | 1381 | _klass_map->at_put_grow(serial_num, k); |
mchung@831 | 1382 | } |
mchung@831 | 1383 | |
mchung@831 | 1384 | // HPROF_TRACE and HPROF_FRAME records |
mchung@831 | 1385 | void dump_stack_traces(); |
mchung@831 | 1386 | |
duke@435 | 1387 | // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
duke@435 | 1388 | void write_dump_header(); |
duke@435 | 1389 | |
duke@435 | 1390 | // fixes up the length of the current dump record |
duke@435 | 1391 | void write_current_dump_record_length(); |
duke@435 | 1392 | |
duke@435 | 1393 | // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END |
duke@435 | 1394 | // record in the case of a segmented heap dump) |
duke@435 | 1395 | void end_of_dump(); |
duke@435 | 1396 | |
duke@435 | 1397 | public: |
thurka@2130 | 1398 | VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : |
duke@435 | 1399 | VM_GC_Operation(0 /* total collections, dummy, ignored */, |
brutisso@2532 | 1400 | GCCause::_heap_dump /* GC Cause */, |
duke@435 | 1401 | 0 /* total full collections, dummy, ignored */, |
duke@435 | 1402 | gc_before_heap_dump) { |
ysr@1050 | 1403 | _local_writer = writer; |
duke@435 | 1404 | _gc_before_heap_dump = gc_before_heap_dump; |
duke@435 | 1405 | _is_segmented_dump = false; |
duke@435 | 1406 | _dump_start = (jlong)-1; |
mchung@831 | 1407 | _klass_map = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(INITIAL_CLASS_COUNT, true); |
mchung@831 | 1408 | _stack_traces = NULL; |
mchung@831 | 1409 | _num_threads = 0; |
thurka@2130 | 1410 | if (oome) { |
thurka@2130 | 1411 | assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); |
thurka@2130 | 1412 | // get OutOfMemoryError zero-parameter constructor |
thurka@2130 | 1413 | instanceKlass* oome_ik = instanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); |
thurka@2130 | 1414 | _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), |
thurka@2130 | 1415 | vmSymbols::void_method_signature()); |
thurka@2130 | 1416 | // get thread throwing OOME when generating the heap dump at OOME |
thurka@2130 | 1417 | _oome_thread = JavaThread::current(); |
thurka@2130 | 1418 | } else { |
thurka@2130 | 1419 | _oome_thread = NULL; |
thurka@2130 | 1420 | _oome_constructor = NULL; |
thurka@2130 | 1421 | } |
mchung@831 | 1422 | } |
mchung@831 | 1423 | ~VM_HeapDumper() { |
mchung@831 | 1424 | if (_stack_traces != NULL) { |
mchung@831 | 1425 | for (int i=0; i < _num_threads; i++) { |
mchung@831 | 1426 | delete _stack_traces[i]; |
mchung@831 | 1427 | } |
mchung@831 | 1428 | FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces); |
mchung@831 | 1429 | } |
mchung@831 | 1430 | delete _klass_map; |
duke@435 | 1431 | } |
duke@435 | 1432 | |
duke@435 | 1433 | VMOp_Type type() const { return VMOp_HeapDumper; } |
duke@435 | 1434 | // used to mark sub-record boundary |
duke@435 | 1435 | void check_segment_length(); |
duke@435 | 1436 | void doit(); |
duke@435 | 1437 | }; |
duke@435 | 1438 | |
ysr@1050 | 1439 | VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; |
ysr@1050 | 1440 | DumpWriter* VM_HeapDumper::_global_writer = NULL; |
ysr@1050 | 1441 | |
duke@435 | 1442 | bool VM_HeapDumper::skip_operation() const { |
duke@435 | 1443 | return false; |
duke@435 | 1444 | } |
duke@435 | 1445 | |
duke@435 | 1446 | // sets the dump starting position |
duke@435 | 1447 | void VM_HeapDumper::set_dump_start(jlong pos) { |
duke@435 | 1448 | _dump_start = pos; |
duke@435 | 1449 | } |
duke@435 | 1450 | |
duke@435 | 1451 | // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record |
duke@435 | 1452 | void VM_HeapDumper::write_dump_header() { |
duke@435 | 1453 | if (writer()->is_open()) { |
duke@435 | 1454 | if (is_segmented_dump()) { |
duke@435 | 1455 | writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); |
duke@435 | 1456 | } else { |
duke@435 | 1457 | writer()->write_u1(HPROF_HEAP_DUMP); |
duke@435 | 1458 | } |
duke@435 | 1459 | writer()->write_u4(0); // current ticks |
duke@435 | 1460 | |
duke@435 | 1461 | // record the starting position for the dump (its length will be fixed up later) |
duke@435 | 1462 | set_dump_start(writer()->current_offset()); |
duke@435 | 1463 | writer()->write_u4(0); |
duke@435 | 1464 | } |
duke@435 | 1465 | } |
duke@435 | 1466 | |
duke@435 | 1467 | // fixes up the length of the current dump record |
duke@435 | 1468 | void VM_HeapDumper::write_current_dump_record_length() { |
duke@435 | 1469 | if (writer()->is_open()) { |
duke@435 | 1470 | assert(dump_start() >= 0, "no dump start recorded"); |
duke@435 | 1471 | |
duke@435 | 1472 | // calculate the size of the dump record |
duke@435 | 1473 | jlong dump_end = writer()->current_offset(); |
duke@435 | 1474 | jlong dump_len = (dump_end - dump_start() - 4); |
duke@435 | 1475 | |
duke@435 | 1476 | // record length must fit in a u4 |
duke@435 | 1477 | if (dump_len > (jlong)(4L*(jlong)G)) { |
duke@435 | 1478 | warning("record is too large"); |
duke@435 | 1479 | } |
duke@435 | 1480 | |
duke@435 | 1481 | // seek to the dump start and fix-up the length |
duke@435 | 1482 | writer()->seek_to_offset(dump_start()); |
duke@435 | 1483 | writer()->write_u4((u4)dump_len); |
duke@435 | 1484 | |
duke@435 | 1485 | // adjust the total size written to keep the bytes written correct. |
duke@435 | 1486 | writer()->adjust_bytes_written(-((long) sizeof(u4))); |
duke@435 | 1487 | |
duke@435 | 1488 | // seek to dump end so we can continue |
duke@435 | 1489 | writer()->seek_to_offset(dump_end); |
duke@435 | 1490 | |
duke@435 | 1491 | // no current dump record |
duke@435 | 1492 | set_dump_start((jlong)-1); |
duke@435 | 1493 | } |
duke@435 | 1494 | } |
duke@435 | 1495 | |
duke@435 | 1496 | // used on a sub-record boundary to check if we need to start a |
duke@435 | 1497 | // new segment. |
duke@435 | 1498 | void VM_HeapDumper::check_segment_length() { |
duke@435 | 1499 | if (writer()->is_open()) { |
duke@435 | 1500 | if (is_segmented_dump()) { |
duke@435 | 1501 | // don't use current_offset that would be too expensive on a per record basis |
duke@435 | 1502 | jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); |
duke@435 | 1503 | assert(dump_end == writer()->current_offset(), "checking"); |
duke@435 | 1504 | jlong dump_len = (dump_end - dump_start() - 4); |
duke@435 | 1505 | assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); |
duke@435 | 1506 | |
duke@435 | 1507 | if (dump_len > (jlong)HeapDumpSegmentSize) { |
duke@435 | 1508 | write_current_dump_record_length(); |
duke@435 | 1509 | write_dump_header(); |
duke@435 | 1510 | } |
duke@435 | 1511 | } |
duke@435 | 1512 | } |
duke@435 | 1513 | } |
duke@435 | 1514 | |
duke@435 | 1515 | // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END |
duke@435 | 1516 | // record in the case of a segmented heap dump) |
duke@435 | 1517 | void VM_HeapDumper::end_of_dump() { |
duke@435 | 1518 | if (writer()->is_open()) { |
duke@435 | 1519 | write_current_dump_record_length(); |
duke@435 | 1520 | |
duke@435 | 1521 | // for segmented dump we write the end record |
duke@435 | 1522 | if (is_segmented_dump()) { |
duke@435 | 1523 | writer()->write_u1(HPROF_HEAP_DUMP_END); |
duke@435 | 1524 | writer()->write_u4(0); |
duke@435 | 1525 | writer()->write_u4(0); |
duke@435 | 1526 | } |
duke@435 | 1527 | } |
duke@435 | 1528 | } |
duke@435 | 1529 | |
duke@435 | 1530 | // marks sub-record boundary |
duke@435 | 1531 | void HeapObjectDumper::mark_end_of_record() { |
duke@435 | 1532 | dumper()->check_segment_length(); |
duke@435 | 1533 | } |
duke@435 | 1534 | |
duke@435 | 1535 | // writes a HPROF_LOAD_CLASS record for the class (and each of its |
duke@435 | 1536 | // array classes) |
duke@435 | 1537 | void VM_HeapDumper::do_load_class(klassOop k) { |
duke@435 | 1538 | static u4 class_serial_num = 0; |
duke@435 | 1539 | |
duke@435 | 1540 | // len of HPROF_LOAD_CLASS record |
duke@435 | 1541 | u4 remaining = 2*oopSize + 2*sizeof(u4); |
duke@435 | 1542 | |
duke@435 | 1543 | // write a HPROF_LOAD_CLASS for the class and each array class |
duke@435 | 1544 | do { |
ysr@1050 | 1545 | DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); |
duke@435 | 1546 | |
duke@435 | 1547 | // class serial number is just a number |
ysr@1050 | 1548 | writer()->write_u4(++class_serial_num); |
duke@435 | 1549 | |
duke@435 | 1550 | // class ID |
duke@435 | 1551 | Klass* klass = Klass::cast(k); |
ysr@1050 | 1552 | writer()->write_classID(klass); |
duke@435 | 1553 | |
mchung@831 | 1554 | // add the klassOop and class serial number pair |
ysr@1050 | 1555 | dumper()->add_class_serial_number(klass, class_serial_num); |
mchung@831 | 1556 | |
ysr@1050 | 1557 | writer()->write_u4(STACK_TRACE_ID); |
duke@435 | 1558 | |
duke@435 | 1559 | // class name ID |
coleenp@2497 | 1560 | Symbol* name = klass->name(); |
coleenp@2497 | 1561 | writer()->write_symbolID(name); |
duke@435 | 1562 | |
duke@435 | 1563 | // write a LOAD_CLASS record for the array type (if it exists) |
duke@435 | 1564 | k = klass->array_klass_or_null(); |
duke@435 | 1565 | } while (k != NULL); |
duke@435 | 1566 | } |
duke@435 | 1567 | |
duke@435 | 1568 | // writes a HPROF_GC_CLASS_DUMP record for the given class |
duke@435 | 1569 | void VM_HeapDumper::do_class_dump(klassOop k) { |
ysr@1050 | 1570 | DumperSupport::dump_class_and_array_classes(writer(), k); |
duke@435 | 1571 | } |
duke@435 | 1572 | |
duke@435 | 1573 | // writes a HPROF_GC_CLASS_DUMP records for a given basic type |
duke@435 | 1574 | // array (and each multi-dimensional array too) |
duke@435 | 1575 | void VM_HeapDumper::do_basic_type_array_class_dump(klassOop k) { |
ysr@1050 | 1576 | DumperSupport::dump_basic_type_array_class(writer(), k); |
duke@435 | 1577 | } |
duke@435 | 1578 | |
duke@435 | 1579 | // Walk the stack of the given thread. |
duke@435 | 1580 | // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local |
duke@435 | 1581 | // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local |
mchung@831 | 1582 | // |
mchung@831 | 1583 | // It returns the number of Java frames in this thread stack |
mchung@831 | 1584 | int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { |
duke@435 | 1585 | JNILocalsDumper blk(writer(), thread_serial_num); |
duke@435 | 1586 | |
duke@435 | 1587 | oop threadObj = java_thread->threadObj(); |
duke@435 | 1588 | assert(threadObj != NULL, "sanity check"); |
duke@435 | 1589 | |
mchung@831 | 1590 | int stack_depth = 0; |
duke@435 | 1591 | if (java_thread->has_last_Java_frame()) { |
duke@435 | 1592 | |
duke@435 | 1593 | // vframes are resource allocated |
duke@435 | 1594 | Thread* current_thread = Thread::current(); |
duke@435 | 1595 | ResourceMark rm(current_thread); |
duke@435 | 1596 | HandleMark hm(current_thread); |
duke@435 | 1597 | |
duke@435 | 1598 | RegisterMap reg_map(java_thread); |
duke@435 | 1599 | frame f = java_thread->last_frame(); |
duke@435 | 1600 | vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); |
mchung@831 | 1601 | frame* last_entry_frame = NULL; |
thurka@2130 | 1602 | int extra_frames = 0; |
duke@435 | 1603 | |
thurka@2130 | 1604 | if (java_thread == _oome_thread && _oome_constructor != NULL) { |
thurka@2130 | 1605 | extra_frames++; |
thurka@2130 | 1606 | } |
duke@435 | 1607 | while (vf != NULL) { |
mchung@831 | 1608 | blk.set_frame_number(stack_depth); |
duke@435 | 1609 | if (vf->is_java_frame()) { |
duke@435 | 1610 | |
duke@435 | 1611 | // java frame (interpreted, compiled, ...) |
duke@435 | 1612 | javaVFrame *jvf = javaVFrame::cast(vf); |
duke@435 | 1613 | if (!(jvf->method()->is_native())) { |
duke@435 | 1614 | StackValueCollection* locals = jvf->locals(); |
duke@435 | 1615 | for (int slot=0; slot<locals->size(); slot++) { |
duke@435 | 1616 | if (locals->at(slot)->type() == T_OBJECT) { |
duke@435 | 1617 | oop o = locals->obj_at(slot)(); |
duke@435 | 1618 | |
duke@435 | 1619 | if (o != NULL) { |
duke@435 | 1620 | writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); |
duke@435 | 1621 | writer()->write_objectID(o); |
duke@435 | 1622 | writer()->write_u4(thread_serial_num); |
thurka@2130 | 1623 | writer()->write_u4((u4) (stack_depth + extra_frames)); |
duke@435 | 1624 | } |
duke@435 | 1625 | } |
duke@435 | 1626 | } |
mchung@831 | 1627 | } else { |
mchung@831 | 1628 | // native frame |
mchung@831 | 1629 | if (stack_depth == 0) { |
mchung@831 | 1630 | // JNI locals for the top frame. |
mchung@831 | 1631 | java_thread->active_handles()->oops_do(&blk); |
mchung@831 | 1632 | } else { |
mchung@831 | 1633 | if (last_entry_frame != NULL) { |
mchung@831 | 1634 | // JNI locals for the entry frame |
mchung@831 | 1635 | assert(last_entry_frame->is_entry_frame(), "checking"); |
mchung@831 | 1636 | last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); |
mchung@831 | 1637 | } |
mchung@831 | 1638 | } |
duke@435 | 1639 | } |
mchung@831 | 1640 | // increment only for Java frames |
mchung@831 | 1641 | stack_depth++; |
mchung@831 | 1642 | last_entry_frame = NULL; |
mchung@831 | 1643 | |
duke@435 | 1644 | } else { |
duke@435 | 1645 | // externalVFrame - if it's an entry frame then report any JNI locals |
mchung@831 | 1646 | // as roots when we find the corresponding native javaVFrame |
duke@435 | 1647 | frame* fr = vf->frame_pointer(); |
duke@435 | 1648 | assert(fr != NULL, "sanity check"); |
duke@435 | 1649 | if (fr->is_entry_frame()) { |
mchung@831 | 1650 | last_entry_frame = fr; |
duke@435 | 1651 | } |
duke@435 | 1652 | } |
duke@435 | 1653 | vf = vf->sender(); |
duke@435 | 1654 | } |
mchung@831 | 1655 | } else { |
mchung@831 | 1656 | // no last java frame but there may be JNI locals |
mchung@831 | 1657 | java_thread->active_handles()->oops_do(&blk); |
duke@435 | 1658 | } |
mchung@831 | 1659 | return stack_depth; |
duke@435 | 1660 | } |
duke@435 | 1661 | |
duke@435 | 1662 | |
duke@435 | 1663 | // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk |
duke@435 | 1664 | // the stack so that locals and JNI locals are dumped. |
duke@435 | 1665 | void VM_HeapDumper::do_threads() { |
mchung@831 | 1666 | for (int i=0; i < _num_threads; i++) { |
mchung@831 | 1667 | JavaThread* thread = _stack_traces[i]->thread(); |
duke@435 | 1668 | oop threadObj = thread->threadObj(); |
mchung@831 | 1669 | u4 thread_serial_num = i+1; |
mchung@831 | 1670 | u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; |
mchung@831 | 1671 | writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); |
mchung@831 | 1672 | writer()->write_objectID(threadObj); |
mchung@831 | 1673 | writer()->write_u4(thread_serial_num); // thread number |
mchung@831 | 1674 | writer()->write_u4(stack_serial_num); // stack trace serial number |
mchung@831 | 1675 | int num_frames = do_thread(thread, thread_serial_num); |
mchung@831 | 1676 | assert(num_frames == _stack_traces[i]->get_stack_depth(), |
mchung@831 | 1677 | "total number of Java frames not matched"); |
duke@435 | 1678 | } |
duke@435 | 1679 | } |
duke@435 | 1680 | |
duke@435 | 1681 | |
duke@435 | 1682 | // The VM operation that dumps the heap. The dump consists of the following |
duke@435 | 1683 | // records: |
duke@435 | 1684 | // |
duke@435 | 1685 | // HPROF_HEADER |
duke@435 | 1686 | // [HPROF_UTF8]* |
duke@435 | 1687 | // [HPROF_LOAD_CLASS]* |
mchung@831 | 1688 | // [[HPROF_FRAME]*|HPROF_TRACE]* |
duke@435 | 1689 | // [HPROF_GC_CLASS_DUMP]* |
duke@435 | 1690 | // HPROF_HEAP_DUMP |
duke@435 | 1691 | // |
mchung@831 | 1692 | // The HPROF_TRACE records represent the stack traces where the heap dump |
mchung@831 | 1693 | // is generated and a "dummy trace" record which does not include |
mchung@831 | 1694 | // any frames. The dummy trace record is used to be referenced as the |
mchung@831 | 1695 | // unknown object alloc site. |
duke@435 | 1696 | // |
duke@435 | 1697 | // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow |
duke@435 | 1698 | // the heap dump be generated in a single pass we remember the position of |
duke@435 | 1699 | // the dump length and fix it up after all sub-records have been written. |
duke@435 | 1700 | // To generate the sub-records we iterate over the heap, writing |
duke@435 | 1701 | // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP |
duke@435 | 1702 | // records as we go. Once that is done we write records for some of the GC |
duke@435 | 1703 | // roots. |
duke@435 | 1704 | |
duke@435 | 1705 | void VM_HeapDumper::doit() { |
duke@435 | 1706 | |
duke@435 | 1707 | HandleMark hm; |
duke@435 | 1708 | CollectedHeap* ch = Universe::heap(); |
duke@435 | 1709 | if (_gc_before_heap_dump) { |
duke@435 | 1710 | ch->collect_as_vm_thread(GCCause::_heap_dump); |
duke@435 | 1711 | } else { |
duke@435 | 1712 | // make the heap parsable (no need to retire TLABs) |
duke@435 | 1713 | ch->ensure_parsability(false); |
duke@435 | 1714 | } |
duke@435 | 1715 | |
ysr@1050 | 1716 | // At this point we should be the only dumper active, so |
ysr@1050 | 1717 | // the following should be safe. |
ysr@1050 | 1718 | set_global_dumper(); |
ysr@1050 | 1719 | set_global_writer(); |
ysr@1050 | 1720 | |
duke@435 | 1721 | // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 |
ysr@777 | 1722 | size_t used = ch->used(); |
duke@435 | 1723 | const char* header; |
duke@435 | 1724 | if (used > (size_t)SegmentedHeapDumpThreshold) { |
duke@435 | 1725 | set_segmented_dump(); |
duke@435 | 1726 | header = "JAVA PROFILE 1.0.2"; |
duke@435 | 1727 | } else { |
duke@435 | 1728 | header = "JAVA PROFILE 1.0.1"; |
duke@435 | 1729 | } |
ysr@1050 | 1730 | |
duke@435 | 1731 | // header is few bytes long - no chance to overflow int |
duke@435 | 1732 | writer()->write_raw((void*)header, (int)strlen(header)); |
duke@435 | 1733 | writer()->write_u1(0); // terminator |
duke@435 | 1734 | writer()->write_u4(oopSize); |
duke@435 | 1735 | writer()->write_u8(os::javaTimeMillis()); |
duke@435 | 1736 | |
duke@435 | 1737 | // HPROF_UTF8 records |
duke@435 | 1738 | SymbolTableDumper sym_dumper(writer()); |
coleenp@2497 | 1739 | SymbolTable::symbols_do(&sym_dumper); |
duke@435 | 1740 | |
duke@435 | 1741 | // write HPROF_LOAD_CLASS records |
duke@435 | 1742 | SystemDictionary::classes_do(&do_load_class); |
duke@435 | 1743 | Universe::basic_type_classes_do(&do_load_class); |
duke@435 | 1744 | |
mchung@831 | 1745 | // write HPROF_FRAME and HPROF_TRACE records |
mchung@831 | 1746 | // this must be called after _klass_map is built when iterating the classes above. |
mchung@831 | 1747 | dump_stack_traces(); |
mchung@831 | 1748 | |
duke@435 | 1749 | // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT |
duke@435 | 1750 | write_dump_header(); |
duke@435 | 1751 | |
duke@435 | 1752 | // Writes HPROF_GC_CLASS_DUMP records |
duke@435 | 1753 | SystemDictionary::classes_do(&do_class_dump); |
duke@435 | 1754 | Universe::basic_type_classes_do(&do_basic_type_array_class_dump); |
duke@435 | 1755 | check_segment_length(); |
duke@435 | 1756 | |
duke@435 | 1757 | // writes HPROF_GC_INSTANCE_DUMP records. |
duke@435 | 1758 | // After each sub-record is written check_segment_length will be invoked. When |
duke@435 | 1759 | // generated a segmented heap dump this allows us to check if the current |
duke@435 | 1760 | // segment exceeds a threshold and if so, then a new segment is started. |
duke@435 | 1761 | // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk |
duke@435 | 1762 | // of the heap dump. |
duke@435 | 1763 | HeapObjectDumper obj_dumper(this, writer()); |
jmasa@952 | 1764 | Universe::heap()->safe_object_iterate(&obj_dumper); |
duke@435 | 1765 | |
duke@435 | 1766 | // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals |
duke@435 | 1767 | do_threads(); |
duke@435 | 1768 | check_segment_length(); |
duke@435 | 1769 | |
duke@435 | 1770 | // HPROF_GC_ROOT_MONITOR_USED |
duke@435 | 1771 | MonitorUsedDumper mon_dumper(writer()); |
duke@435 | 1772 | ObjectSynchronizer::oops_do(&mon_dumper); |
duke@435 | 1773 | check_segment_length(); |
duke@435 | 1774 | |
duke@435 | 1775 | // HPROF_GC_ROOT_JNI_GLOBAL |
duke@435 | 1776 | JNIGlobalsDumper jni_dumper(writer()); |
duke@435 | 1777 | JNIHandles::oops_do(&jni_dumper); |
duke@435 | 1778 | check_segment_length(); |
duke@435 | 1779 | |
duke@435 | 1780 | // HPROF_GC_ROOT_STICKY_CLASS |
duke@435 | 1781 | StickyClassDumper class_dumper(writer()); |
duke@435 | 1782 | SystemDictionary::always_strong_oops_do(&class_dumper); |
duke@435 | 1783 | |
duke@435 | 1784 | // fixes up the length of the dump record. In the case of a segmented |
duke@435 | 1785 | // heap then the HPROF_HEAP_DUMP_END record is also written. |
duke@435 | 1786 | end_of_dump(); |
ysr@1050 | 1787 | |
ysr@1050 | 1788 | // Now we clear the global variables, so that a future dumper might run. |
ysr@1050 | 1789 | clear_global_dumper(); |
ysr@1050 | 1790 | clear_global_writer(); |
duke@435 | 1791 | } |
duke@435 | 1792 | |
mchung@831 | 1793 | void VM_HeapDumper::dump_stack_traces() { |
mchung@831 | 1794 | // write a HPROF_TRACE record without any frames to be referenced as object alloc sites |
mchung@831 | 1795 | DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); |
mchung@831 | 1796 | writer()->write_u4((u4) STACK_TRACE_ID); |
mchung@831 | 1797 | writer()->write_u4(0); // thread number |
mchung@831 | 1798 | writer()->write_u4(0); // frame count |
mchung@831 | 1799 | |
mchung@831 | 1800 | _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads()); |
mchung@831 | 1801 | int frame_serial_num = 0; |
mchung@831 | 1802 | for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { |
mchung@831 | 1803 | oop threadObj = thread->threadObj(); |
mchung@831 | 1804 | if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
mchung@831 | 1805 | // dump thread stack trace |
mchung@831 | 1806 | ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); |
mchung@831 | 1807 | stack_trace->dump_stack_at_safepoint(-1); |
mchung@831 | 1808 | _stack_traces[_num_threads++] = stack_trace; |
mchung@831 | 1809 | |
mchung@831 | 1810 | // write HPROF_FRAME records for this thread's stack trace |
mchung@831 | 1811 | int depth = stack_trace->get_stack_depth(); |
mchung@831 | 1812 | int thread_frame_start = frame_serial_num; |
thurka@2130 | 1813 | int extra_frames = 0; |
thurka@2130 | 1814 | // write fake frame that makes it look like the thread, which caused OOME, |
thurka@2130 | 1815 | // is in the OutOfMemoryError zero-parameter constructor |
thurka@2130 | 1816 | if (thread == _oome_thread && _oome_constructor != NULL) { |
thurka@2130 | 1817 | int oome_serial_num = _klass_map->find(Klass::cast(_oome_constructor->method_holder())); |
thurka@2130 | 1818 | // the class serial number starts from 1 |
thurka@2130 | 1819 | assert(oome_serial_num > 0, "OutOfMemoryError class not found"); |
thurka@2130 | 1820 | DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, oome_serial_num, |
thurka@2130 | 1821 | _oome_constructor, 0); |
thurka@2130 | 1822 | extra_frames++; |
thurka@2130 | 1823 | } |
mchung@831 | 1824 | for (int j=0; j < depth; j++) { |
mchung@831 | 1825 | StackFrameInfo* frame = stack_trace->stack_frame_at(j); |
mchung@831 | 1826 | methodOop m = frame->method(); |
mchung@831 | 1827 | int class_serial_num = _klass_map->find(Klass::cast(m->method_holder())); |
mchung@831 | 1828 | // the class serial number starts from 1 |
mchung@831 | 1829 | assert(class_serial_num > 0, "class not found"); |
mchung@831 | 1830 | DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); |
mchung@831 | 1831 | } |
thurka@2130 | 1832 | depth += extra_frames; |
mchung@831 | 1833 | |
mchung@831 | 1834 | // write HPROF_TRACE record for one thread |
mchung@831 | 1835 | DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); |
mchung@831 | 1836 | int stack_serial_num = _num_threads + STACK_TRACE_ID; |
mchung@831 | 1837 | writer()->write_u4(stack_serial_num); // stack trace serial number |
mchung@831 | 1838 | writer()->write_u4((u4) _num_threads); // thread serial number |
mchung@831 | 1839 | writer()->write_u4(depth); // frame count |
mchung@831 | 1840 | for (int j=1; j <= depth; j++) { |
mchung@831 | 1841 | writer()->write_id(thread_frame_start + j); |
mchung@831 | 1842 | } |
mchung@831 | 1843 | } |
mchung@831 | 1844 | } |
mchung@831 | 1845 | } |
duke@435 | 1846 | |
duke@435 | 1847 | // dump the heap to given path. |
duke@435 | 1848 | int HeapDumper::dump(const char* path) { |
duke@435 | 1849 | assert(path != NULL && strlen(path) > 0, "path missing"); |
duke@435 | 1850 | |
duke@435 | 1851 | // print message in interactive case |
duke@435 | 1852 | if (print_to_tty()) { |
duke@435 | 1853 | tty->print_cr("Dumping heap to %s ...", path); |
duke@435 | 1854 | timer()->start(); |
duke@435 | 1855 | } |
duke@435 | 1856 | |
duke@435 | 1857 | // create the dump writer. If the file can be opened then bail |
duke@435 | 1858 | DumpWriter writer(path); |
duke@435 | 1859 | if (!writer.is_open()) { |
duke@435 | 1860 | set_error(writer.error()); |
duke@435 | 1861 | if (print_to_tty()) { |
duke@435 | 1862 | tty->print_cr("Unable to create %s: %s", path, |
duke@435 | 1863 | (error() != NULL) ? error() : "reason unknown"); |
duke@435 | 1864 | } |
duke@435 | 1865 | return -1; |
duke@435 | 1866 | } |
duke@435 | 1867 | |
duke@435 | 1868 | // generate the dump |
thurka@2130 | 1869 | VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); |
ysr@1050 | 1870 | if (Thread::current()->is_VM_thread()) { |
ysr@1050 | 1871 | assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); |
ysr@1050 | 1872 | dumper.doit(); |
ysr@1050 | 1873 | } else { |
ysr@1050 | 1874 | VMThread::execute(&dumper); |
ysr@1050 | 1875 | } |
duke@435 | 1876 | |
duke@435 | 1877 | // close dump file and record any error that the writer may have encountered |
duke@435 | 1878 | writer.close(); |
duke@435 | 1879 | set_error(writer.error()); |
duke@435 | 1880 | |
duke@435 | 1881 | // print message in interactive case |
duke@435 | 1882 | if (print_to_tty()) { |
duke@435 | 1883 | timer()->stop(); |
duke@435 | 1884 | if (error() == NULL) { |
duke@435 | 1885 | char msg[256]; |
duke@435 | 1886 | sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", |
duke@435 | 1887 | os::jlong_format_specifier(), timer()->seconds()); |
duke@435 | 1888 | tty->print_cr(msg, writer.bytes_written()); |
duke@435 | 1889 | } else { |
duke@435 | 1890 | tty->print_cr("Dump file is incomplete: %s", writer.error()); |
duke@435 | 1891 | } |
duke@435 | 1892 | } |
duke@435 | 1893 | |
duke@435 | 1894 | return (writer.error() == NULL) ? 0 : -1; |
duke@435 | 1895 | } |
duke@435 | 1896 | |
duke@435 | 1897 | // stop timer (if still active), and free any error string we might be holding |
duke@435 | 1898 | HeapDumper::~HeapDumper() { |
duke@435 | 1899 | if (timer()->is_active()) { |
duke@435 | 1900 | timer()->stop(); |
duke@435 | 1901 | } |
duke@435 | 1902 | set_error(NULL); |
duke@435 | 1903 | } |
duke@435 | 1904 | |
duke@435 | 1905 | |
duke@435 | 1906 | // returns the error string (resource allocated), or NULL |
duke@435 | 1907 | char* HeapDumper::error_as_C_string() const { |
duke@435 | 1908 | if (error() != NULL) { |
duke@435 | 1909 | char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); |
duke@435 | 1910 | strcpy(str, error()); |
duke@435 | 1911 | return str; |
duke@435 | 1912 | } else { |
duke@435 | 1913 | return NULL; |
duke@435 | 1914 | } |
duke@435 | 1915 | } |
duke@435 | 1916 | |
duke@435 | 1917 | // set the error string |
duke@435 | 1918 | void HeapDumper::set_error(char* error) { |
duke@435 | 1919 | if (_error != NULL) { |
duke@435 | 1920 | os::free(_error); |
duke@435 | 1921 | } |
duke@435 | 1922 | if (error == NULL) { |
duke@435 | 1923 | _error = NULL; |
duke@435 | 1924 | } else { |
duke@435 | 1925 | _error = os::strdup(error); |
duke@435 | 1926 | assert(_error != NULL, "allocation failure"); |
duke@435 | 1927 | } |
duke@435 | 1928 | } |
duke@435 | 1929 | |
thurka@2130 | 1930 | // Called by out-of-memory error reporting by a single Java thread |
thurka@2130 | 1931 | // outside of a JVM safepoint |
thurka@2130 | 1932 | void HeapDumper::dump_heap_from_oome() { |
thurka@2130 | 1933 | HeapDumper::dump_heap(true); |
thurka@2130 | 1934 | } |
thurka@2130 | 1935 | |
ysr@1050 | 1936 | // Called by error reporting by a single Java thread outside of a JVM safepoint, |
ysr@1050 | 1937 | // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various |
ysr@1050 | 1938 | // callers are strictly serialized and guaranteed not to interfere below. For more |
ysr@1050 | 1939 | // general use, however, this method will need modification to prevent |
ysr@1050 | 1940 | // inteference when updating the static variables base_path and dump_file_seq below. |
duke@435 | 1941 | void HeapDumper::dump_heap() { |
thurka@2130 | 1942 | HeapDumper::dump_heap(false); |
thurka@2130 | 1943 | } |
thurka@2130 | 1944 | |
thurka@2130 | 1945 | void HeapDumper::dump_heap(bool oome) { |
ysr@1050 | 1946 | static char base_path[JVM_MAXPATHLEN] = {'\0'}; |
ysr@1050 | 1947 | static uint dump_file_seq = 0; |
coleenp@2463 | 1948 | char* my_path; |
coleenp@2463 | 1949 | const int max_digit_chars = 20; |
coleenp@2463 | 1950 | |
coleenp@2463 | 1951 | const char* dump_file_name = "java_pid"; |
coleenp@2463 | 1952 | const char* dump_file_ext = ".hprof"; |
duke@435 | 1953 | |
duke@435 | 1954 | // The dump file defaults to java_pid<pid>.hprof in the current working |
duke@435 | 1955 | // directory. HeapDumpPath=<file> can be used to specify an alternative |
duke@435 | 1956 | // dump file name or a directory where dump file is created. |
ysr@1050 | 1957 | if (dump_file_seq == 0) { // first time in, we initialize base_path |
coleenp@2463 | 1958 | // Calculate potentially longest base path and check if we have enough |
coleenp@2463 | 1959 | // allocated statically. |
coleenp@2463 | 1960 | const size_t total_length = |
coleenp@2463 | 1961 | (HeapDumpPath == NULL ? 0 : strlen(HeapDumpPath)) + |
coleenp@2463 | 1962 | strlen(os::file_separator()) + max_digit_chars + |
coleenp@2463 | 1963 | strlen(dump_file_name) + strlen(dump_file_ext) + 1; |
coleenp@2463 | 1964 | if (total_length > sizeof(base_path)) { |
coleenp@2463 | 1965 | warning("Cannot create heap dump file. HeapDumpPath is too long."); |
coleenp@2463 | 1966 | return; |
coleenp@2463 | 1967 | } |
coleenp@2463 | 1968 | |
ysr@1050 | 1969 | bool use_default_filename = true; |
ysr@1050 | 1970 | if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { |
ysr@1050 | 1971 | // HeapDumpPath=<file> not specified |
duke@435 | 1972 | } else { |
coleenp@2463 | 1973 | strncpy(base_path, HeapDumpPath, sizeof(base_path)); |
ysr@1050 | 1974 | // check if the path is a directory (must exist) |
ysr@1050 | 1975 | DIR* dir = os::opendir(base_path); |
ysr@1050 | 1976 | if (dir == NULL) { |
ysr@1050 | 1977 | use_default_filename = false; |
ysr@1050 | 1978 | } else { |
ysr@1050 | 1979 | // HeapDumpPath specified a directory. We append a file separator |
ysr@1050 | 1980 | // (if needed). |
ysr@1050 | 1981 | os::closedir(dir); |
ysr@1050 | 1982 | size_t fs_len = strlen(os::file_separator()); |
ysr@1050 | 1983 | if (strlen(base_path) >= fs_len) { |
ysr@1050 | 1984 | char* end = base_path; |
ysr@1050 | 1985 | end += (strlen(base_path) - fs_len); |
ysr@1050 | 1986 | if (strcmp(end, os::file_separator()) != 0) { |
ysr@1050 | 1987 | strcat(base_path, os::file_separator()); |
ysr@1050 | 1988 | } |
duke@435 | 1989 | } |
duke@435 | 1990 | } |
duke@435 | 1991 | } |
ysr@1050 | 1992 | // If HeapDumpPath wasn't a file name then we append the default name |
ysr@1050 | 1993 | if (use_default_filename) { |
coleenp@2463 | 1994 | const size_t dlen = strlen(base_path); // if heap dump dir specified |
coleenp@2463 | 1995 | jio_snprintf(&base_path[dlen], sizeof(base_path)-dlen, "%s%d%s", |
coleenp@2463 | 1996 | dump_file_name, os::current_process_id(), dump_file_ext); |
ysr@1050 | 1997 | } |
coleenp@2463 | 1998 | const size_t len = strlen(base_path) + 1; |
coleenp@2463 | 1999 | my_path = (char*)os::malloc(len); |
coleenp@2463 | 2000 | if (my_path == NULL) { |
coleenp@2463 | 2001 | warning("Cannot create heap dump file. Out of system memory."); |
coleenp@2463 | 2002 | return; |
coleenp@2463 | 2003 | } |
coleenp@2463 | 2004 | strncpy(my_path, base_path, len); |
ysr@1050 | 2005 | } else { |
ysr@1050 | 2006 | // Append a sequence number id for dumps following the first |
coleenp@2463 | 2007 | const size_t len = strlen(base_path) + max_digit_chars + 2; // for '.' and \0 |
coleenp@2463 | 2008 | my_path = (char*)os::malloc(len); |
coleenp@2463 | 2009 | if (my_path == NULL) { |
coleenp@2463 | 2010 | warning("Cannot create heap dump file. Out of system memory."); |
coleenp@2463 | 2011 | return; |
coleenp@2463 | 2012 | } |
coleenp@2463 | 2013 | jio_snprintf(my_path, len, "%s.%d", base_path, dump_file_seq); |
duke@435 | 2014 | } |
ysr@1050 | 2015 | dump_file_seq++; // increment seq number for next time we dump |
duke@435 | 2016 | |
duke@435 | 2017 | HeapDumper dumper(false /* no GC before heap dump */, |
thurka@2130 | 2018 | true /* send to tty */, |
thurka@2130 | 2019 | oome /* pass along out-of-memory-error flag */); |
ysr@1050 | 2020 | dumper.dump(my_path); |
coleenp@2463 | 2021 | os::free(my_path); |
duke@435 | 2022 | } |