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V124. Function 'Foo' writes/reads 'N' bytes. The alignment rules and type sizes have been changed. Consider reviewing this value.
This rule belongs to the "Diagnosis of 64-bit errors" group. The rules in this group are no longer developed and may be disabled in the future. If you use these rules, please contact our support team—we will help you find a replacement or suggest an alternative solution.
The analyzer detected a potential error: the size of data being written or read is defined by a constant.
When the code is compiled in the 64-bit mode, the sizes of some data and their alignment boundaries will change. The sizes of base types and their alignment boundaries are shown in the picture:
The analyzer examines code fragments where the size of data being written or read is defined explicitly. The programmer must review these fragments. Here is a code sample:
size_t n = fread(buf, 1, 40, f_in);Constant 40 may be an incorrect value from the viewpoint of the 64-bit system. Perhaps you should write it so:
size_t n = fread(buf, 1, 10 * sizeof(size_t), f_in);Was this page helpful?
