Java Compiler in Python (JCP)

This project is a part of the course Compiler Design (CS 335), IIT Kanpur. This is a Java compiler implemented in python3 with x86 as the target language.

This compiler is a multi-parse compiler, i.e., it first generates an AST (Abstract Syntax Tree form) file and then, it generates a TAC (Three Address Code) file which then is used for the generation of assembly files.

References

• The grammar that we have used is taken from plyj

Setup

sudo pip3 install -r requirements.txt

Dependencies

• pydot
• ply

Usage

python3 jcp/parser.py [-g] path_to_file/file_name

-g: debug flag

Modules

• jcp/

  • lexer.py: contains the token definitions
  • parser_rules.py: contains grammar rules and their corresponding actions
  • parser.py: initlizes parser and reads the file writes the output
  • ptg.py(parse tree generator): contains helper functions to generate parse tree
  • 3addrcode.py: generates TAC (Three Address Code) and it's corresponding assembly, object files
  • symbol_table.py: handles symbol tables for a program by having a class table

• helper/

  • fileio.s: handles the file IO actions
  • mem.s: code for heap allocation
  • printing.s: code for stdio