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6964458: Reimplement class meta-data storage to use native memory

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Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes

Co-authored-by: Stefan Karlsson <stefan.karlsson@oracle.com>
Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com>
Co-authored-by: Tom Rodriguez <tom.rodriguez@oracle.com>
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
This commit is contained in:
Jon Masamitsu 2012-09-01 13:25:18 -04:00 • committed by Coleen Phillimore
parent 36eee7c8c8
commit 5c58d27aac
853 changed files with 26124 additions and 82956 deletions
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19
hotspot/src/share/vm/interpreter/oopMapCache.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2012, 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
@ -32,7 +32,7 @@
// The memory management system uses the cache when locating object
// references in an interpreted frame.
//
// OopMapCache's are allocated lazily per instanceKlass.
// OopMapCache's are allocated lazily per InstanceKlass.
// The oopMap (InterpreterOopMap) is stored as a bit mask. If the
// bit_mask can fit into two words it is stored in
@ -83,7 +83,7 @@ class InterpreterOopMap: ResourceObj {
};
private:
methodOop _method; // the method for which the mask is valid
Method* _method; // the method for which the mask is valid
unsigned short _bci; // the bci for which the mask is valid
int _mask_size; // the mask size in bits
int _expression_stack_size; // the size of the expression stack in slots
@ -100,8 +100,8 @@ class InterpreterOopMap: ResourceObj {
#endif
// access methods
methodOop method() const { return _method; }
void set_method(methodOop v) { _method = v; }
Method* method() const { return _method; }
void set_method(Method* v) { _method = v; }
int bci() const { return _bci; }
void set_bci(int v) { _bci = v; }
int mask_size() const { return _mask_size; }
@ -142,9 +142,6 @@ class InterpreterOopMap: ResourceObj {
void resource_copy(OopMapCacheEntry* from);
void iterate_oop(OffsetClosure* oop_closure);
void oop_iterate(OopClosure * blk);
void oop_iterate(OopClosure * blk, MemRegion mr);
void verify();
void print();
bool is_oop (int offset) { return (entry_at(offset) & (1 << oop_bit_number )) != 0; }
@ -185,12 +182,6 @@ class OopMapCache : public CHeapObj<mtClass> {
// Compute an oop map without updating the cache or grabbing any locks (for debugging)
static void compute_one_oop_map(methodHandle method, int bci, InterpreterOopMap* entry);
// Helpers
// Iterate over the entries in the cached OopMapCacheEntry's
void oop_iterate(OopClosure *blk);
void oop_iterate(OopClosure *blk, MemRegion mr);
void verify();
// Returns total no. of bytes allocated as part of OopMapCache's
static long memory_usage() PRODUCT_RETURN0;
};