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6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"

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The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition.

Reviewed-by: ysr, dcubed
This commit is contained in:
Jon Masamitsu 2009-01-11 16:58:24 -08:00
parent 3474623106
commit c2ff9781c7
18 changed files with 161 additions and 19 deletions
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11
hotspot/src/share/vm/oops/klass.hpp
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@ -606,8 +606,19 @@ class Klass : public Klass_vtbl {
#undef assert_same_query
// Unless overridden, oop is parsable if it has a klass pointer.
// Parsability of an object is object specific.
virtual bool oop_is_parsable(oop obj) const { return true; }
// Unless overridden, oop is safe for concurrent GC processing
// after its allocation is complete. The exception to
// this is the case where objects are changed after allocation.
// Class redefinition is one of the known exceptions. During
// class redefinition, an allocated class can changed in order
// order to create a merged class (the combiniation of the
// old class definition that has to be perserved and the new class
// definition which is being created.
virtual bool oop_is_conc_safe(oop obj) const { return true; }
// Access flags
AccessFlags access_flags() const { return _access_flags; }
void set_access_flags(AccessFlags flags) { _access_flags = flags; }