Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/generationCounters.hpp @ 1951:899bbbdcb6ea
6997298: fatal error: must own lock CMS_markBitMap_lock during heap dump
Summary: Since we are at a stop-world pause, the existing CMS-phase checks are sufficient for safety, and the locking check can be safely elided. Elaborated documentation comment to the case where class unloading and verification are disabled, and the query happens when we aren't in the sweeping phase, where the answer "false" would be (almost everywhere) too pessimistic.
Reviewed-by: jmasa, johnc, tonyp
author | ysr |
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date | Fri, 05 Nov 2010 13:20:37 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2004, Oracle and/or its affiliates. All rights reserved. |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // A GenerationCounter is a holder class for performance counters | |
26 // that track a generation | |
27 | |
28 class GenerationCounters: public CHeapObj { | |
29 friend class VMStructs; | |
30 | |
31 protected: | |
32 PerfVariable* _current_size; | |
33 VirtualSpace* _virtual_space; | |
34 | |
35 // Constant PerfData types don't need to retain a reference. | |
36 // However, it's a good idea to document them here. | |
37 // PerfStringConstant* _name; | |
38 // PerfConstant* _min_size; | |
39 // PerfConstant* _max_size; | |
40 // PerfConstant* _spaces; | |
41 | |
42 char* _name_space; | |
43 | |
44 // This constructor is only meant for use with the PSGenerationCounters | |
45 // constructor. The need for such an constructor should be eliminated | |
46 // when VirtualSpace and PSVirtualSpace are unified. | |
47 GenerationCounters() : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {} | |
48 public: | |
49 | |
50 GenerationCounters(const char* name, int ordinal, int spaces, | |
51 VirtualSpace* v); | |
52 | |
53 ~GenerationCounters() { | |
54 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space); | |
55 } | |
56 | |
57 virtual void update_all() { | |
58 _current_size->set_value(_virtual_space->committed_size()); | |
59 } | |
60 | |
61 const char* name_space() const { return _name_space; } | |
62 }; |