1.1 --- a/src/share/vm/oops/arrayOop.cpp Fri Oct 28 13:04:10 2011 -0400
1.2 +++ b/src/share/vm/oops/arrayOop.cpp Mon Oct 31 08:01:20 2011 +0100
1.3 @@ -23,9 +23,40 @@
1.4 */
1.5
1.6 #include "precompiled.hpp"
1.7 +
1.8 +/////////////// Unit tests ///////////////
1.9 +
1.10 +#ifndef PRODUCT
1.11 +
1.12 #include "oops/arrayOop.hpp"
1.13 -#include "oops/objArrayOop.hpp"
1.14 -#include "oops/oop.inline.hpp"
1.15 -#include "oops/symbol.hpp"
1.16 +#include "utilities/globalDefinitions.hpp"
1.17
1.18 -// <<this page is intentionally left blank>>
1.19 +bool arrayOopDesc::check_max_length_overflow(BasicType type) {
1.20 + julong length = max_array_length(type);
1.21 + julong bytes_per_element = type2aelembytes(type);
1.22 + julong bytes = length * bytes_per_element + header_size_in_bytes();
1.23 + return (julong)(size_t)bytes == bytes;
1.24 +}
1.25 +
1.26 +bool arrayOopDesc::test_max_array_length() {
1.27 + tty->print_cr("test_max_array_length");
1.28 +
1.29 + assert(check_max_length_overflow(T_BOOLEAN), "size_t overflow for boolean array");
1.30 + assert(check_max_length_overflow(T_CHAR), "size_t overflow for char array");
1.31 + assert(check_max_length_overflow(T_FLOAT), "size_t overflow for float array");
1.32 + assert(check_max_length_overflow(T_DOUBLE), "size_t overflow for double array");
1.33 + assert(check_max_length_overflow(T_BYTE), "size_t overflow for byte array");
1.34 + assert(check_max_length_overflow(T_SHORT), "size_t overflow for short array");
1.35 + assert(check_max_length_overflow(T_INT), "size_t overflow for int array");
1.36 + assert(check_max_length_overflow(T_LONG), "size_t overflow for long array");
1.37 + assert(check_max_length_overflow(T_OBJECT), "size_t overflow for object array");
1.38 + assert(check_max_length_overflow(T_ARRAY), "size_t overflow for array array");
1.39 + assert(check_max_length_overflow(T_NARROWOOP), "size_t overflow for narrowOop array");
1.40 +
1.41 + // T_VOID and T_ADDRESS are not supported by max_array_length()
1.42 +
1.43 + return true;
1.44 +}
1.45 +
1.46 +
1.47 +#endif //PRODUCT
