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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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15
hotspot/src/share/vm/prims/methodComparator.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 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
@ -26,8 +26,8 @@
#define SHARE_VM_PRIMS_METHODCOMPARATOR_HPP
#include "interpreter/bytecodeStream.hpp"
#include "oops/constantPoolOop.hpp"
#include "oops/methodOop.hpp"
#include "oops/constantPool.hpp"
#include "oops/method.hpp"
class BciMap;
@ -37,14 +37,15 @@ class BciMap;
class MethodComparator {
private:
static BytecodeStream *_s_old, *_s_new;
static constantPoolOop _old_cp, _new_cp;
static ConstantPool* _old_cp;
static ConstantPool* _new_cp;
static BciMap *_bci_map;
static bool _switchable_test;
static GrowableArray<int> *_fwd_jmps;
static bool args_same(Bytecodes::Code c_old, Bytecodes::Code c_new);
static bool pool_constants_same(int cpi_old, int cpi_new);
static int check_stack_and_locals_size(methodOop old_method, methodOop new_method);
static int check_stack_and_locals_size(Method* old_method, Method* new_method);
public:
// Check if the new method is equivalent to the old one modulo constant pool (EMCP).
@ -52,9 +53,9 @@ class MethodComparator {
// on the source code level. Practically, we check whether the only difference between
// method versions is some constantpool indices embedded into the bytecodes, and whether
// these indices eventually point to the same constants for both method versions.
static bool methods_EMCP(methodOop old_method, methodOop new_method);
static bool methods_EMCP(Method* old_method, Method* new_method);
static bool methods_switchable(methodOop old_method, methodOop new_method, BciMap &bci_map);
static bool methods_switchable(Method* old_method, Method* new_method, BciMap &bci_map);
};