Function evaluate_pieces 

pub fn evaluate_pieces<R: Reader<Offset = usize>, T: MemoryAccess>(
    dwarf: &Dwarf<R>,
    unit: &Unit<R>,
    pc: u32,
    expr: Expression<R>,
    frame_base: Option<u64>,
    registers: &Registers,
    mem: &mut T,
) -> Result<Vec<Piece<R>>>

Evaluates a gimli-rs Expression into a Vec of Pieces.

Description:

• dwarf - A reference to gimli-rs Dwarf struct.
• unit - A compilation unit which contains the given DIE.
• pc - A machine code address, usually the current code location.
• expr - The expression to be evaluated into Pieces.
• frame_base - The frame base address value.
• registers - A register struct for accessing the register values.
• mem - A struct for accessing the memory of the debug target.

This function will evaluate the given expression into a list of pieces. These pieces describe the size and location of the variable the given expression is from.