Mercurial > hg > truffle
annotate src/share/vm/services/heapDumper.hpp @ 615:c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung
| author | ysr |
|---|---|
| date | Mon, 02 Mar 2009 16:37:04 -0800 |
| parents | a61af66fc99e |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 2005-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // HeapDumper is used to dump the java heap to file in HPROF binary format: | |
| 26 // | |
| 27 // { HeapDumper dumper(true /* full GC before heap dump */); | |
| 28 // if (dumper.dump("/export/java.hprof")) { | |
| 29 // ResourceMark rm; | |
| 30 // tty->print_cr("Dump failed: %s", dumper.error_as_C_string()); | |
| 31 // } else { | |
| 32 // // dump succeeded | |
| 33 // } | |
| 34 // } | |
| 35 // | |
| 36 | |
| 37 class HeapDumper : public StackObj { | |
| 38 private: | |
| 39 char* _error; | |
| 40 bool _print_to_tty; | |
| 41 bool _gc_before_heap_dump; | |
| 42 elapsedTimer _t; | |
| 43 | |
| 44 // string representation of error | |
| 45 char* error() const { return _error; } | |
| 46 void set_error(char* error); | |
| 47 | |
| 48 // indicates if progress messages can be sent to tty | |
| 49 bool print_to_tty() const { return _print_to_tty; } | |
| 50 | |
| 51 // internal timer. | |
| 52 elapsedTimer* timer() { return &_t; } | |
| 53 | |
| 54 public: | |
| 55 HeapDumper(bool gc_before_heap_dump) : | |
|
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c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
0
diff
changeset
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56 _gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(false) { } |
| 0 | 57 HeapDumper(bool gc_before_heap_dump, bool print_to_tty) : |
| 58 _gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(print_to_tty) { } | |
| 59 | |
| 60 ~HeapDumper(); | |
| 61 | |
| 62 // dumps the heap to the specified file, returns 0 if success. | |
| 63 int dump(const char* path); | |
| 64 | |
| 65 // returns error message (resource allocated), or NULL if no error | |
| 66 char* error_as_C_string() const; | |
| 67 | |
| 68 static void dump_heap() KERNEL_RETURN; | |
| 69 }; |