--- a/hotspot/src/share/vm/classfile/metadataOnStackMark.hpp Tue Oct 14 20:35:45 2014 +0000
+++ b/hotspot/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(bool has_redefined_a_class);
- ~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