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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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23
hotspot/src/share/vm/code/debugInfo.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
@ -40,6 +40,8 @@
// - LocationValue describes a value in a given location (in frame or register)
// - ConstantValue describes a constant
class ConstantOopReadValue;
class ScopeValue: public ResourceObj {
public:
// Testers
@ -51,6 +53,11 @@ class ScopeValue: public ResourceObj {
virtual bool is_constant_oop() const { return false; }
virtual bool equals(ScopeValue* other) const { return false; }
ConstantOopReadValue* as_ConstantOopReadValue() {
assert(is_constant_oop(), "must be");
return (ConstantOopReadValue*) this;
}
// Serialization of debugging information
virtual void write_on(DebugInfoWriteStream* stream) = 0;
static ScopeValue* read_from(DebugInfoReadStream* stream);
@ -94,7 +101,7 @@ class ObjectValue: public ScopeValue {
, _field_values()
, _value()
, _visited(false) {
assert(klass->is_constant_oop(), "should be constant klass oop");
assert(klass->is_constant_oop(), "should be constant java mirror oop");
}
ObjectValue(int id)
@ -260,7 +267,15 @@ class DebugInfoReadStream : public CompressedReadStream {
} ;
oop read_oop() {
return code()->oop_at(read_int());
oop o = code()->oop_at(read_int());
assert(o == NULL || o->is_oop(), "oop only");
return o;
}
Method* read_method() {
Method* o = (Method*)(code()->metadata_at(read_int()));
assert(o == NULL ||
o->is_metadata(), "meta data only");
return o;
}
ScopeValue* read_object_value();
ScopeValue* get_cached_object();
@ -279,6 +294,8 @@ class DebugInfoWriteStream : public CompressedWriteStream {
DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size);
void write_handle(jobject h);
void write_bci(int bci) { write_int(bci - InvocationEntryBci); }
void write_metadata(Metadata* m);
};
#endif // SHARE_VM_CODE_DEBUGINFO_HPP