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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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10
hotspot/src/share/vm/oops/constantPoolKlass.cpp
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@ -25,7 +25,7 @@
# include "incls/_precompiled.incl"
# include "incls/_constantPoolKlass.cpp.incl"
constantPoolOop constantPoolKlass::allocate(int length, TRAPS) {
constantPoolOop constantPoolKlass::allocate(int length, bool is_conc_safe, TRAPS) {
int size = constantPoolOopDesc::object_size(length);
KlassHandle klass (THREAD, as_klassOop());
constantPoolOop c =
@ -38,6 +38,9 @@ constantPoolOop constantPoolKlass::allocate(int length, TRAPS) {
c->set_flags(0);
// only set to non-zero if constant pool is merged by RedefineClasses
c->set_orig_length(0);
// if constant pool may change during RedefineClasses, it is created
// unsafe for GC concurrent processing.
c->set_is_conc_safe(is_conc_safe);
// all fields are initialized; needed for GC
// initialize tag array
@ -207,6 +210,11 @@ int constantPoolKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr)
return size;
}
bool constantPoolKlass::oop_is_conc_safe(oop obj) const {
assert(obj->is_constantPool(), "must be constantPool");
return constantPoolOop(obj)->is_conc_safe();
}
#ifndef SERIALGC
int constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
assert (obj->is_constantPool(), "obj must be constant pool");