archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-20 19:14:38 +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

17
hotspot/src/share/vm/utilities/globalDefinitions.hpp
View file

@ -128,6 +128,14 @@ class HeapWord {
#endif
};
// Analogous opaque struct for metadata allocated from
// metaspaces.
class MetaWord {
friend class VMStructs;
private:
char* i;
};
// HeapWordSize must be 2^LogHeapWordSize.
const int HeapWordSize = sizeof(HeapWord);
#ifdef _LP64
@ -272,6 +280,10 @@ inline size_t pointer_delta(const void* left,
inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) {
return pointer_delta(left, right, sizeof(HeapWord));
}
// A version specialized for MetaWord*'s.
inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) {
return pointer_delta(left, right, sizeof(MetaWord));
}
//
// ANSI C++ does not allow casting from one pointer type to a function pointer
@ -482,7 +494,8 @@ enum BasicType {
T_VOID = 14,
T_ADDRESS = 15,
T_NARROWOOP= 16,
T_CONFLICT = 17, // for stack value type with conflicting contents
T_METADATA = 17,
T_CONFLICT = 18, // for stack value type with conflicting contents
T_ILLEGAL = 99
};
@ -854,6 +867,7 @@ class PeriodicTask;
class JavaCallWrapper;
class oopDesc;
class metaDataOopDesc;
class NativeCall;
@ -911,6 +925,7 @@ const int freeBlockPad = 0xBA; // value used to pad
const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks.
const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area
const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC
const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC
const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation
const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation