ghc-7.6.1: The GHC API

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SMRep

Contents

Synopsis

Words and bytes

type WordOff = Int

type ByteOff = Int

Closure repesentation

data SMRep

A description of the layout of a closure. Corresponds directly to the closure types in includesrtsstorage/ClosureTypes.h.

Instances

type IsStatic = Bool

True = This is a static closure. Affects how we garbage-collect it. Static closure have an extra static link field at the end.

data ClosureTypeInfo

Constructors

Constr ConstrTag ConstrDescription 
Fun FunArity ArgDescr 
Thunk 
ThunkSelector SelectorOffset 
BlackHole 

type Liveness = [Bool]

Construction

Predicates

Size-related things

fixedHdrSize :: WordOff

Size of a closure header (StgHeader in includesrtsstorage/Closures.h)

profHdrSize :: WordOff

Size of the profiling part of a closure header (StgProfHeader in includesrtsstorage/Closures.h)

RTS closure types

rtsClosureType :: SMRep -> StgHalfWord

Derives the RTS closure type from an SMRep

Operations over [Word8] strings that don't belong here