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8006040: NPG: on_stack processing wastes space in ConstantPool

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Added on_stack bit to flags.  Also MetadataMarkOnStack is used for more than JVMTI so had to be moved.

Reviewed-by: dholmes, stefank
This commit is contained in:
Coleen Phillimore 2013-01-23 10:34:29 -05:00
parent 4d81507a36
commit 99039568f9
9 changed files with 152 additions and 96 deletions
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15
hotspot/src/share/vm/prims/jvmtiRedefineClasses.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -487,17 +487,4 @@ class VM_RedefineClasses: public VM_Operation {
// and redefine implementation
static bool is_modifiable_class(oop klass_mirror);
};
// 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.
class MetadataOnStackMark : public StackObj {
NOT_PRODUCT(static bool _is_active;)
public:
MetadataOnStackMark() NOT_JVMTI_RETURN;
~MetadataOnStackMark() NOT_JVMTI_RETURN;
static void record(Metadata* m) NOT_JVMTI_RETURN;
};
#endif // SHARE_VM_PRIMS_JVMTIREDEFINECLASSES_HPP