Mercurial > hg > truffle

comparison src/share/vm/classfile/metadataOnStackMark.hpp @ 20619:b12a2a9b05ca

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8056240: Investigate increased GC remark time after class unloading changes in CRM Fuse Reviewed-by: mgerdin, coleenp, bdelsart
author stefank
date Thu, 02 Oct 2014 10:55:36 +0200
parents 5daaddd917a1
children
comparison
equal deleted inserted replaced
20618:7024b693c8f9 20619:b12a2a9b05ca
24 24
25 #ifndef SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP 25 #ifndef SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP
26 #define SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP 26 #define SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP
27 27
28 #include "memory/allocation.hpp" 28 #include "memory/allocation.hpp"
29 #include "utilities/chunkedList.hpp"
29 30
30 class Metadata; 31 class Metadata;
32
33 typedef ChunkedList<Metadata*, mtInternal> MetadataOnStackBuffer;
31 34
32 // Helper class to mark and unmark metadata used on the stack as either handles 35 // Helper class to mark and unmark metadata used on the stack as either handles
33 // or executing methods, so that it can't be deleted during class redefinition 36 // or executing methods, so that it can't be deleted during class redefinition
34 // and class unloading. 37 // and class unloading.
35 // This is also used for other things that can be deallocated, like class 38 // This is also used for other things that can be deallocated, like class
36 // metadata during parsing, relocated methods, and methods in backtraces. 39 // metadata during parsing, relocated methods, and methods in backtraces.
37 class MetadataOnStackMark : public StackObj { 40 class MetadataOnStackMark : public StackObj {
38 NOT_PRODUCT(static bool _is_active;) 41 NOT_PRODUCT(static bool _is_active;)
42
43 static volatile MetadataOnStackBuffer* _used_buffers;
44 static volatile MetadataOnStackBuffer* _free_buffers;
45
46 static MetadataOnStackBuffer* allocate_buffer();
47 static void retire_buffer(MetadataOnStackBuffer* buffer);
48
39 public: 49 public:
40 MetadataOnStackMark(); 50 MetadataOnStackMark(bool visit_code_cache);
41 ~MetadataOnStackMark(); 51 ~MetadataOnStackMark();
42 static void record(Metadata* m); 52
53 static void record(Metadata* m, Thread* thread);
54 static void retire_buffer_for_thread(Thread* thread);
55 static bool has_buffer_for_thread(Thread* thread);
43 }; 56 };
44 57
45 #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP 58 #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP