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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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39
hotspot/src/share/vm/opto/compile.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2011, 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
@ -141,36 +141,51 @@ class Compile : public Phase {
};
struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type
enum {
trapHistLength = methodDataOopDesc::_trap_hist_limit
trapHistLength = MethodData::_trap_hist_limit
};
// Constant entry of the constant table.
class Constant {
private:
BasicType _type;
union {
jvalue _value;
Metadata* _metadata;
} _v;
int _offset; // offset of this constant (in bytes) relative to the constant table base.
float _freq;
bool _can_be_reused; // true (default) if the value can be shared with other users.
public:
Constant() : _type(T_ILLEGAL), _offset(-1), _freq(0.0f), _can_be_reused(true) { _value.l = 0; }
Constant() : _type(T_ILLEGAL), _offset(-1), _freq(0.0f), _can_be_reused(true) { _v._value.l = 0; }
Constant(BasicType type, jvalue value, float freq = 0.0f, bool can_be_reused = true) :
_type(type),
_value(value),
_offset(-1),
_freq(freq),
_can_be_reused(can_be_reused)
{}
{
assert(type != T_METADATA, "wrong constructor");
_v._value = value;
}
Constant(Metadata* metadata, bool can_be_reused = true) :
_type(T_METADATA),
_offset(-1),
_freq(0.0f),
_can_be_reused(can_be_reused)
{
_v._metadata = metadata;
}
bool operator==(const Constant& other);
BasicType type() const { return _type; }
jlong get_jlong() const { return _value.j; }
jfloat get_jfloat() const { return _value.f; }
jdouble get_jdouble() const { return _value.d; }
jobject get_jobject() const { return _value.l; }
jlong get_jlong() const { return _v._value.j; }
jfloat get_jfloat() const { return _v._value.f; }
jdouble get_jdouble() const { return _v._value.d; }
jobject get_jobject() const { return _v._value.l; }
Metadata* get_metadata() const { return _v._metadata; }
int offset() const { return _offset; }
void set_offset(int offset) { _offset = offset; }
@ -219,6 +234,7 @@ class Compile : public Phase {
void add(Constant& con);
Constant add(MachConstantNode* n, BasicType type, jvalue value);
Constant add(Metadata* metadata);
Constant add(MachConstantNode* n, MachOper* oper);
Constant add(MachConstantNode* n, jfloat f) {
jvalue value; value.f = f;
@ -270,7 +286,7 @@ class Compile : public Phase {
bool _do_scheduling; // True if we intend to do scheduling
bool _do_freq_based_layout; // True if we intend to do frequency based block layout
bool _do_count_invocations; // True if we generate code to count invocations
bool _do_method_data_update; // True if we generate code to update methodDataOops
bool _do_method_data_update; // True if we generate code to update MethodData*s
int _AliasLevel; // Locally-adjusted version of AliasLevel flag.
bool _print_assembly; // True if we should dump assembly code for this compilation
#ifndef PRODUCT
@ -896,9 +912,6 @@ class Compile : public Phase {
// graph is strongly connected from root in both directions.
void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN;
// Print bytecodes, including the scope inlining tree
void print_codes();
// End-of-run dumps.
static void print_statistics() PRODUCT_RETURN;