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6687581: Make CMS work with compressed oops

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Make FreeChunk read markword instead of LSB in _klass pointer to indicate that it's a FreeChunk for compressed oops.

Reviewed-by: ysr, jmasa
This commit is contained in:
Coleen Phillimore 2008-06-09 11:51:19 -04:00
parent 4cce21039e
commit a2d6036a4d
13 changed files with 315 additions and 160 deletions
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10
hotspot/src/share/vm/runtime/vmStructs.cpp
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@ -1694,7 +1694,12 @@ static inline uint64_t cast_uint64_t(size_t x)
declare_constant(markOopDesc::no_hash) \
declare_constant(markOopDesc::no_hash_in_place) \
declare_constant(markOopDesc::no_lock_in_place) \
declare_constant(markOopDesc::max_age)
declare_constant(markOopDesc::max_age) \
\
/* Constants in markOop used by CMS. */ \
declare_constant(markOopDesc::cms_shift) \
declare_constant(markOopDesc::cms_mask) \
declare_constant(markOopDesc::size_shift) \
/* NOTE that we do not use the last_entry() macro here; it is used */
/* in vmStructs_<os>_<cpu>.hpp's VM_LONG_CONSTANTS_OS_CPU macro (and */
@ -1958,6 +1963,7 @@ VMStructEntry VMStructs::localHotSpotVMStructs[] = {
GENERATE_STATIC_VM_STRUCT_ENTRY)
VM_STRUCTS_CMS(GENERATE_NONSTATIC_VM_STRUCT_ENTRY, \
GENERATE_NONSTATIC_VM_STRUCT_ENTRY, \
GENERATE_STATIC_VM_STRUCT_ENTRY)
#endif // SERIALGC
@ -2099,6 +2105,7 @@ VMStructs::init() {
CHECK_STATIC_VM_STRUCT_ENTRY);
VM_STRUCTS_CMS(CHECK_NONSTATIC_VM_STRUCT_ENTRY,
CHECK_VOLATILE_NONSTATIC_VM_STRUCT_ENTRY,
CHECK_STATIC_VM_STRUCT_ENTRY);
#endif // SERIALGC
@ -2203,6 +2210,7 @@ VMStructs::init() {
debug_only(VM_STRUCTS_PARALLELGC(ENSURE_FIELD_TYPE_PRESENT, \
ENSURE_FIELD_TYPE_PRESENT));
debug_only(VM_STRUCTS_CMS(ENSURE_FIELD_TYPE_PRESENT, \
ENSURE_FIELD_TYPE_PRESENT, \
ENSURE_FIELD_TYPE_PRESENT));
#endif // SERIALGC
debug_only(VM_STRUCTS_CPU(ENSURE_FIELD_TYPE_PRESENT, \