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|
{-# LANGUAGE RecordWildCards, DeriveGeneric, GeneralizedNewtypeDeriving,
BangPatterns, CPP #-}
module GHCi.ResolvedBCO
( ResolvedBCO(..)
, ResolvedBCOPtr(..)
, isLittleEndian
) where
import Prelude -- See note [Why do we import Prelude here?]
import SizedSeq
import GHCi.RemoteTypes
import GHCi.BreakArray
import Data.Array.Unboxed
import Data.Binary
import GHC.Generics
import GHCi.BinaryArray
#include "MachDeps.h"
isLittleEndian :: Bool
#if defined(WORDS_BIGENDIAN)
isLittleEndian = True
#else
isLittleEndian = False
#endif
-- -----------------------------------------------------------------------------
-- ResolvedBCO
-- | A 'ResolvedBCO' is one in which all the 'Name' references have been
-- resolved to actual addresses or 'RemoteHValues'.
--
-- Note, all arrays are zero-indexed (we assume this when
-- serializing/deserializing)
data ResolvedBCO
= ResolvedBCO {
resolvedBCOIsLE :: Bool,
resolvedBCOArity :: {-# UNPACK #-} !Int,
resolvedBCOInstrs :: UArray Int Word16, -- insns
resolvedBCOBitmap :: UArray Int Word64, -- bitmap
resolvedBCOLits :: UArray Int Word64, -- non-ptrs
resolvedBCOPtrs :: (SizedSeq ResolvedBCOPtr) -- ptrs
}
deriving (Generic, Show)
-- | The Binary instance for ResolvedBCOs.
--
-- Note, that we do encode the endianness, however there is no support for mixed
-- endianness setups. This is primarily to ensure that ghc and iserv share the
-- same endianness.
instance Binary ResolvedBCO where
put ResolvedBCO{..} = do
put resolvedBCOIsLE
put resolvedBCOArity
putArray resolvedBCOInstrs
putArray resolvedBCOBitmap
putArray resolvedBCOLits
put resolvedBCOPtrs
get = ResolvedBCO
<$> get <*> get <*> getArray <*> getArray <*> getArray <*> get
data ResolvedBCOPtr
= ResolvedBCORef {-# UNPACK #-} !Int
-- ^ reference to the Nth BCO in the current set
| ResolvedBCOPtr {-# UNPACK #-} !(RemoteRef HValue)
-- ^ reference to a previously created BCO
| ResolvedBCOStaticPtr {-# UNPACK #-} !(RemotePtr ())
-- ^ reference to a static ptr
| ResolvedBCOPtrBCO ResolvedBCO
-- ^ a nested BCO
| ResolvedBCOPtrBreakArray {-# UNPACK #-} !(RemoteRef BreakArray)
-- ^ Resolves to the MutableArray# inside the BreakArray
deriving (Generic, Show)
instance Binary ResolvedBCOPtr
|
