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Aug 31, 2018
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Add an overview of what lowerings are done [DOC-25] #2792

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Add an overview of what lowerings are done
Aug 21, 2018
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Add tempoary reference to background concepts
Aug 30, 2018
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22 changes: 22 additions & 0 deletions jbmc/src/java_bytecode/README.md
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Expand Up @@ -6,6 +6,28 @@ This module provides a front end for Java.
\section java-bytecode-conversion-section Overview of conversion from bytecode to codet

To be documented.
\subsection java-bytecode-lowering-to-goto Lowering to GOTO

The Java language contains high-level programming concepts like virtual
functions and throw/catch semantics. These need to be rewritten in terms of
other, more fundamental operations in order to analyse the Java program. This
operation is referred to as "lowering". See Background Concepts for more
information.

The following lowering operations are done on Java bytecode after converting
into a basic `codet` representation.

- \ref java-bytecode-runtime-exceptions "Add runtime exceptions"
- \ref java-bytecode-remove-java-new "Remove `new` calls"
- \ref java-bytecode-remove-exceptions "Remove thrown exceptions"
- \ref java-bytecode-remove-instance-of
- As well as other non-Java specific transformations (see \ref goto-programs for
details on these)

These are performed in `process_goto_function` for example
\ref jbmc_parse_optionst::process_goto_function

Once these lowerings have been completed, you have a GOTO model that can be handled by \ref goto-symex.

\section java-bytecode-array-representation How are Java arrays represented in GOTO

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