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comparison src/share/vm/opto/subnode.cpp @ 10279:70120f47d403

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8014189: JVM crash with SEGV in ConnectionGraph::record_for_escape_analysis() Summary: Add NULL checks and asserts for Type::make_ptr() returned value. Reviewed-by: twisti
author kvn
date Thu, 09 May 2013 17:28:04 -0700
parents cc32ccaaf47f
children c9ccd7b85f20
comparison
equal deleted inserted replaced
10278:6f3fd5150b67 10279:70120f47d403
861 const Type *CmpNNode::sub( const Type *t1, const Type *t2 ) const { 861 const Type *CmpNNode::sub( const Type *t1, const Type *t2 ) const {
862 const TypePtr *r0 = t1->make_ptr(); // Handy access 862 const TypePtr *r0 = t1->make_ptr(); // Handy access
863 const TypePtr *r1 = t2->make_ptr(); 863 const TypePtr *r1 = t2->make_ptr();
864 864
865 // Undefined inputs makes for an undefined result 865 // Undefined inputs makes for an undefined result
866 if( TypePtr::above_centerline(r0->_ptr) || 866 if ((r0 == NULL) || (r1 == NULL) ||
867 TypePtr::above_centerline(r1->_ptr) ) 867 TypePtr::above_centerline(r0->_ptr) ||
868 TypePtr::above_centerline(r1->_ptr)) {
868 return Type::TOP; 869 return Type::TOP;
869 870 }
870 if (r0 == r1 && r0->singleton()) { 871 if (r0 == r1 && r0->singleton()) {
871 // Equal pointer constants (klasses, nulls, etc.) 872 // Equal pointer constants (klasses, nulls, etc.)
872 return TypeInt::CC_EQ; 873 return TypeInt::CC_EQ;
873 } 874 }
874 875