When two computer systems communicate, for example over a network, they must agree on the ordering of bytes within numbers. This ordering is called endianess. Often one of the systems has to swap the order of bytes to the agreed standard. Results of this work help programmers to find places in their program where they forgot to swap the bytes. We have developed a dynamic data-flow analysis built upon the popular Valgrind tool. Compared to the static analysis currently used by the Linux kernel developers, our approach does not require annotation of variables with their endianess. Typically only few places in the program source code will need to be annotated. The analysis can also detect potential bugs that would only manifest if the program was run on computer with opposite endianess. Our approach has been validated on an existing program known to contain yet unfixed endianess problems (RadeonSI OpenGL driver). It has identified all endianess-related bugs and provided useful diagnostic messages together with their location.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:383094 |
| Date | January 2018 |
| Creators | Kápl, Roman |
| Contributors | Parízek, Pavel, Yaghob, Jakub |
| Source Sets | Czech ETDs |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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