archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-20 11:04:34 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

27
hotspot/src/share/vm/memory/allocation.hpp
View file

@ -70,6 +70,9 @@
// For classes used as name spaces.
// - AllStatic
//
// For classes in Metaspace (class data)
// - MetaspaceObj
//
// The printable subclasses are used for debugging and define virtual
// member functions for printing. Classes that avoid allocating the
// vtbl entries in the objects should therefore not be the printable
@ -211,6 +214,29 @@ class _ValueObj {
void operator delete(void* p);
};
// Base class for objects stored in Metaspace.
// Calling delete will result in fatal error.
//
// Do not inherit from something with a vptr because this class does
// not introduce one. This class is used to allocate both shared read-only
// and shared read-write classes.
//
class ClassLoaderData;
class MetaspaceObj {
public:
bool is_metadata() const;
bool is_shared() const;
void print_address_on(outputStream* st) const; // nonvirtual address printing
void* operator new(size_t size, ClassLoaderData* loader_data,
size_t word_size, bool read_only, Thread* thread);
// can't use TRAPS from this header file.
void operator delete(void* p) { ShouldNotCallThis(); }
};
// Base class for classes that constitute name spaces.
class AllStatic {
@ -252,6 +278,7 @@ class Chunk: CHeapObj<mtChunk> {
void chop(); // Chop this chunk
void next_chop(); // Chop next chunk
static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); }
static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); }
size_t length() const { return _len; }
Chunk* next() const { return _next; }