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6894807: No ClassCastException for HashAttributeSet constructors if run with -Xcomp

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Return interface klass type if it is exact.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2010-01-21 10:07:59 -08:00
parent d19aa4e217
commit 0ebcf0d492
2 changed files with 5 additions and 1 deletions
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1
hotspot/src/share/vm/opto/cfgnode.cpp
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@ -956,6 +956,7 @@ const Type *PhiNode::Value( PhaseTransform *phase ) const {
}
if( jtkp && ttkp ) {
if( jtkp->is_loaded() && jtkp->klass()->is_interface() &&
!jtkp->klass_is_exact() && // Keep exact interface klass (6894807)
ttkp->is_loaded() && !ttkp->klass()->is_interface() ) {
assert(ft == ttkp->cast_to_ptr_type(jtkp->ptr()) ||
ft->isa_narrowoop() && ft->make_ptr() == ttkp->cast_to_ptr_type(jtkp->ptr()), "");

5
hotspot/src/share/vm/opto/type.cpp
View File

@ -2545,12 +2545,15 @@ const Type *TypeOopPtr::filter( const Type *kills ) const {
ftip->is_loaded() && ftip->klass()->is_interface() &&
ktip->is_loaded() && !ktip->klass()->is_interface()) {
// Happens in a CTW of rt.jar, 320-341, no extra flags
assert(!ftip->klass_is_exact(), "interface could not be exact");
return ktip->cast_to_ptr_type(ftip->ptr());
}
// Interface klass type could be exact in opposite to interface type,
// return it here instead of incorrect Constant ptr J/L/Object (6894807).
if (ftkp != NULL && ktkp != NULL &&
ftkp->is_loaded() && ftkp->klass()->is_interface() &&
!ftkp->klass_is_exact() && // Keep exact interface klass
ktkp->is_loaded() && !ktkp->klass()->is_interface()) {
// Happens in a CTW of rt.jar, 320-341, no extra flags
return ktkp->cast_to_ptr_type(ftkp->ptr());
}