ClassFile

Table of Contents Phantom .pc class file structure Record types and structure Constant types Planned

Phantom .pc class file structure

See also VmLinker

Actually repesents any binary representation of class. All binaries are little endian.

{int8} {int32} {int64} - per se.

{string} - {int32} = length in bytes, data bytes follow

{reladdr} - {int32} = address in bytecode relative to the start of address field

{class_def} - {class_rec}....

{class_rec} - "phfr:" literal, {int8} record type, {int64} record length, record data bytes according to length field

{type-def} - {int32} is_container, {string} class name, {string} contained class name

{arg_sig} - {string} arg name, {type-def}

Record types and structure

• 'C': Class name - {string} class name, {int32} n fields in object, {int32} n methods, {string} base class name
• 'M': Method - {string} method name, {int32} ordinal, rest is code.
• 'l': IP to line num map - pairs of {int32} IP address, {int32} line number
• 'S': Method signature - {string} method name, {int32} ordinal, {int32} n args, rest is array of {arg_sig}
• 'f': Field names - {string} name, {int32} ordinal, {type_def}

In progress:

• 'c': constant - {int32} constant id (position in const array), {type_def}, rest is binary constant value

Constant types

• String - binary is string content
• Method - (not impl) binary is method as in method record binary content
• Class ref (not impl)
• Method/field ordinal (not impl)

Planned

Container for pre-compiled JIT-style binary?