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comparison src/share/vm/oops/arrayOop.hpp @ 29:d5fc211aea19

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6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM Summary: T_ADDRESS size is defined as 'int' size (4 bytes) but C2 use it for raw pointers and as memory type for StoreP and LoadP nodes. Reviewed-by: jrose
author kvn
date Mon, 25 Feb 2008 15:05:44 -0800
parents a61af66fc99e
children ba764ed4b6f2
comparison
equal deleted inserted replaced
28:67914967a4b5 29:d5fc211aea19
56 // typeArrayOop::object_size(scale, length, header_size) without causing an 56 // typeArrayOop::object_size(scale, length, header_size) without causing an
57 // overflow. We substract an extra 2*wordSize to guard against double word 57 // overflow. We substract an extra 2*wordSize to guard against double word
58 // alignments. It gets the scale from the type2aelembytes array. 58 // alignments. It gets the scale from the type2aelembytes array.
59 static int32_t max_array_length(BasicType type) { 59 static int32_t max_array_length(BasicType type) {
60 assert(type >= 0 && type < T_CONFLICT, "wrong type"); 60 assert(type >= 0 && type < T_CONFLICT, "wrong type");
61 assert(type2aelembytes[type] != 0, "wrong type"); 61 assert(type2aelembytes(type) != 0, "wrong type");
62 // We use max_jint, since object_size is internally represented by an 'int' 62 // We use max_jint, since object_size is internally represented by an 'int'
63 // This gives us an upper bound of max_jint words for the size of the oop. 63 // This gives us an upper bound of max_jint words for the size of the oop.
64 int32_t max_words = (max_jint - header_size(type) - 2); 64 int32_t max_words = (max_jint - header_size(type) - 2);
65 int elembytes = (type == T_OBJECT) ? T_OBJECT_aelem_bytes : type2aelembytes[type]; 65 int elembytes = (type == T_OBJECT) ? T_OBJECT_aelem_bytes : type2aelembytes(type);
66 jlong len = ((jlong)max_words * HeapWordSize) / elembytes; 66 jlong len = ((jlong)max_words * HeapWordSize) / elembytes;
67 return (len > max_jint) ? max_jint : (int32_t)len; 67 return (len > max_jint) ? max_jint : (int32_t)len;
68 } 68 }
69 69
70 }; 70 };