A parser for Java Classfiles, written in Rust using nom.

Classfile Parser is available from crates.io and can be included in your Cargo enabled project like this:

[dependencies]
classfile-parser = "~0.3"

extern crate classfile_parser;

use classfile_parser::class_parser;

fn main() {
    let classfile_bytes = include_bytes!("../path/to/JavaClass.class");
    
    match class_parser(classfile_bytes) {
        Ok((_, class_file)) => {
            println!(
                "version {},{} \
                 const_pool({}), \
                 this=const[{}], \
                 super=const[{}], \
                 interfaces({}), \
                 fields({}), \
                 methods({}), \
                 attributes({}), \
                 access({:?})",
                class_file.major_version,
                class_file.minor_version,
                class_file.const_pool_size,
                class_file.this_class,
                class_file.super_class,
                class_file.interfaces_count,
                class_file.fields_count,
                class_file.methods_count,
                class_file.attributes_count,
                class_file.access_flags
            );
        }
        Err(_) => panic!("Failed to parse"),
    };
}

• Header
  • Magic const
  • Version info
• Constant pool
  • Constant pool size
  • Constant types
    • Utf8
    • Integer
    • Float
    • Long
    • Double
    • Class
    • String
    • Fieldref
    • Methodref
    • InterfaceMethodref
    • NameAndType
    • MethodHandle
    • MethodType
    • InvokeDynamic
• Access flags
• This class
• Super class
• Interfaces
• Fields
• Methods
• Attributes
  • Basic attribute info block parsing
  • Known typed attributes parsing
    • Critical for JVM
      • ConstantValue
      • Code
      • StackMapTable
      • Exceptions
      • BootstrapMethods
    • Critical for Java SE
      • InnerClasses
      • EnclosingMethod
      • Synthetic
      • Signature
      • RuntimeVisibleAnnotations
      • RuntimeInvisibleAnnotations
      • RuntimeVisibleParameterAnnotations
      • RuntimeInvisibleParameterAnnotations
      • RuntimeVisibleTypeAnnotations
      • RuntimeInvisibleTypeAnnotations
      • AnnotationDefault
      • MethodParameters
    • Useful but not critical
      • SourceFile
      • SourceDebugExtension
      • LineNumberTable
      • LocalVariableTable
      • LocalVariableTypeTable
      • Deprecated