Mercurial > hg > truffle
diff src/share/vm/classfile/metadataOnStackMark.hpp @ 20619:b12a2a9b05ca
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 |
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--- a/src/share/vm/classfile/metadataOnStackMark.hpp Mon Nov 03 12:02:40 2014 -0800 +++ b/src/share/vm/classfile/metadataOnStackMark.hpp Thu Oct 02 10:55:36 2014 +0200 @@ -26,9 +26,12 @@ #define SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP #include "memory/allocation.hpp" +#include "utilities/chunkedList.hpp" class Metadata; +typedef ChunkedList<Metadata*, mtInternal> MetadataOnStackBuffer; + // Helper class to mark and unmark metadata used on the stack as either handles // or executing methods, so that it can't be deleted during class redefinition // and class unloading. @@ -36,10 +39,20 @@ // metadata during parsing, relocated methods, and methods in backtraces. class MetadataOnStackMark : public StackObj { NOT_PRODUCT(static bool _is_active;) + + static volatile MetadataOnStackBuffer* _used_buffers; + static volatile MetadataOnStackBuffer* _free_buffers; + + static MetadataOnStackBuffer* allocate_buffer(); + static void retire_buffer(MetadataOnStackBuffer* buffer); + public: - MetadataOnStackMark(); - ~MetadataOnStackMark(); - static void record(Metadata* m); + MetadataOnStackMark(bool visit_code_cache); + ~MetadataOnStackMark(); + + static void record(Metadata* m, Thread* thread); + static void retire_buffer_for_thread(Thread* thread); + static bool has_buffer_for_thread(Thread* thread); }; #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP