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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/memory/generation.hpp
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@ -48,18 +48,17 @@
// - OneContigSpaceCardGeneration - abstract class holding a single
// contiguous space with card marking
// - TenuredGeneration - tenured (old object) space (markSweepCompact)
// - CompactingPermGenGen - reflective object area (klasses, methods, symbols, ...)
// - ConcurrentMarkSweepGeneration - Mostly Concurrent Mark Sweep Generation
// (Detlefs-Printezis refinement of
// Boehm-Demers-Schenker)
//
// The system configurations currently allowed are:
//
// DefNewGeneration + TenuredGeneration + PermGeneration
// DefNewGeneration + ConcurrentMarkSweepGeneration + ConcurrentMarkSweepPermGen
// DefNewGeneration + TenuredGeneration
// DefNewGeneration + ConcurrentMarkSweepGeneration
//
// ParNewGeneration + TenuredGeneration + PermGeneration
// ParNewGeneration + ConcurrentMarkSweepGeneration + ConcurrentMarkSweepPermGen
// ParNewGeneration + TenuredGeneration
// ParNewGeneration + ConcurrentMarkSweepGeneration
//
class DefNewGeneration;
@ -442,7 +441,6 @@ class Generation: public CHeapObj<mtGC> {
// Mark sweep support phase2
virtual void prepare_for_compaction(CompactPoint* cp);
// Mark sweep support phase3
virtual void pre_adjust_pointers() {ShouldNotReachHere();}
virtual void adjust_pointers();
// Mark sweep support phase4
virtual void compact();
@ -538,11 +536,11 @@ class Generation: public CHeapObj<mtGC> {
// Iterate over all the ref-containing fields of all objects in the
// generation, calling "cl.do_oop" on each.
virtual void oop_iterate(OopClosure* cl);
virtual void oop_iterate(ExtendedOopClosure* cl);
// Same as above, restricted to the intersection of a memory region and
// the generation.
virtual void oop_iterate(MemRegion mr, OopClosure* cl);
virtual void oop_iterate(MemRegion mr, ExtendedOopClosure* cl);
// Iterate over all objects in the generation, calling "cl.do_object" on
// each.
@ -666,7 +664,6 @@ class CardGeneration: public Generation {
class OneContigSpaceCardGeneration: public CardGeneration {
friend class VMStructs;
// Abstractly, this is a subtype that gets access to protected fields.
friend class CompactingPermGen;
friend class VM_PopulateDumpSharedSpace;
protected: