module GHCi.Message
( Message(..), Msg(..)
, EvalStatus_(..), EvalStatus, EvalResult(..), EvalOpts(..), EvalExpr(..)
, SerializableException(..)
, THResult(..), THResultType(..)
, ResumeContext(..)
, QState(..)
, getMessage, putMessage
, Pipe(..), remoteCall, readPipe, writePipe
) where
import GHCi.RemoteTypes
import GHCi.ResolvedBCO
import GHCi.InfoTable (StgInfoTable)
import GHCi.FFI
import GHCi.TH.Binary ()
import GHCi.BreakArray
import GHC.LanguageExtensions
import Control.Concurrent
import Control.Exception
import Data.Binary
import Data.Binary.Get
import Data.Binary.Put
import Data.ByteString (ByteString)
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as LB
import Data.Dynamic
import Data.IORef
import Data.Map (Map)
import Foreign.C
import GHC.Generics
import GHC.Stack.CCS
import qualified Language.Haskell.TH as TH
import qualified Language.Haskell.TH.Syntax as TH
import System.Exit
import System.IO
import System.IO.Error
data Message a where
Shutdown :: Message ()
InitLinker :: Message ()
LookupSymbol :: String -> Message (Maybe (RemotePtr ()))
LookupClosure :: String -> Message (Maybe HValueRef)
LoadDLL :: String -> Message (Maybe String)
LoadArchive :: String -> Message ()
LoadObj :: String -> Message ()
UnloadObj :: String -> Message ()
AddLibrarySearchPath :: String -> Message (RemotePtr ())
RemoveLibrarySearchPath :: RemotePtr () -> Message Bool
ResolveObjs :: Message Bool
FindSystemLibrary :: String -> Message (Maybe String)
CreateBCOs :: [ResolvedBCO] -> Message [HValueRef]
FreeHValueRefs :: [HValueRef] -> Message ()
MallocData :: ByteString -> Message (RemotePtr ())
PrepFFI :: FFIConv -> [FFIType] -> FFIType -> Message (RemotePtr C_ffi_cif)
FreeFFI :: RemotePtr C_ffi_cif -> Message ()
MkConInfoTable
:: Int
-> Int
-> Int
-> [Word8]
-> Message (RemotePtr StgInfoTable)
EvalStmt
:: EvalOpts
-> EvalExpr HValueRef
-> Message (EvalStatus [HValueRef])
ResumeStmt
:: EvalOpts
-> RemoteRef (ResumeContext [HValueRef])
-> Message (EvalStatus [HValueRef])
AbandonStmt
:: RemoteRef (ResumeContext [HValueRef])
-> Message ()
EvalString
:: HValueRef
-> Message (EvalResult String)
EvalStringToString
:: HValueRef
-> String
-> Message (EvalResult String)
EvalIO
:: HValueRef
-> Message (EvalResult ())
MkCostCentre
:: RemotePtr CChar
-> String
-> String
-> Message (RemotePtr CostCentre)
CostCentreStackInfo
:: RemotePtr CostCentreStack
-> Message [String]
NewBreakArray
:: Int
-> Message (RemoteRef BreakArray)
EnableBreakpoint
:: RemoteRef BreakArray
-> Int
-> Bool
-> Message ()
BreakpointStatus
:: RemoteRef BreakArray
-> Int
-> Message Bool
StartTH :: Message (RemoteRef (IORef QState))
FinishTH :: RemoteRef (IORef QState) -> Message ()
RunTH
:: RemoteRef (IORef QState)
-> HValueRef
-> THResultType
-> Maybe TH.Loc
-> Message ByteString
NewName :: String -> Message (THResult TH.Name)
Report :: Bool -> String -> Message (THResult ())
LookupName :: Bool -> String -> Message (THResult (Maybe TH.Name))
Reify :: TH.Name -> Message (THResult TH.Info)
ReifyFixity :: TH.Name -> Message (THResult (Maybe TH.Fixity))
ReifyInstances :: TH.Name -> [TH.Type] -> Message (THResult [TH.Dec])
ReifyRoles :: TH.Name -> Message (THResult [TH.Role])
ReifyAnnotations :: TH.AnnLookup -> TypeRep -> Message (THResult [ByteString])
ReifyModule :: TH.Module -> Message (THResult TH.ModuleInfo)
ReifyConStrictness :: TH.Name -> Message (THResult [TH.DecidedStrictness])
AddDependentFile :: FilePath -> Message (THResult ())
AddTopDecls :: [TH.Dec] -> Message (THResult ())
IsExtEnabled :: Extension -> Message (THResult Bool)
ExtsEnabled :: Message (THResult [Extension])
StartRecover :: Message ()
EndRecover :: Bool -> Message ()
QDone :: Message ()
QException :: String -> Message ()
QFail :: String -> Message ()
deriving instance Show (Message a)
data EvalOpts = EvalOpts
{ useSandboxThread :: Bool
, singleStep :: Bool
, breakOnException :: Bool
, breakOnError :: Bool
}
deriving (Generic, Show)
instance Binary EvalOpts
data ResumeContext a = ResumeContext
{ resumeBreakMVar :: MVar ()
, resumeStatusMVar :: MVar (EvalStatus a)
, resumeThreadId :: ThreadId
}
data EvalExpr a
= EvalThis a
| EvalApp (EvalExpr a) (EvalExpr a)
deriving (Generic, Show)
instance Binary a => Binary (EvalExpr a)
type EvalStatus a = EvalStatus_ a a
data EvalStatus_ a b
= EvalComplete Word64 (EvalResult a)
| EvalBreak Bool
HValueRef
Int
Int
(RemoteRef (ResumeContext b))
(RemotePtr CostCentreStack)
deriving (Generic, Show)
instance Binary a => Binary (EvalStatus_ a b)
data EvalResult a
= EvalException SerializableException
| EvalSuccess a
deriving (Generic, Show)
instance Binary a => Binary (EvalResult a)
data SerializableException
= EUserInterrupt
| EExitCode ExitCode
| EOtherException String
deriving (Generic, Show)
instance Binary ExitCode
instance Binary SerializableException
data THResult a
= THException String
| THComplete a
deriving (Generic, Show)
instance Binary a => Binary (THResult a)
data THResultType = THExp | THPat | THType | THDec | THAnnWrapper
deriving (Enum, Show, Generic)
instance Binary THResultType
data QState = QState
{ qsMap :: Map TypeRep Dynamic
, qsFinalizers :: [TH.Q ()]
, qsLocation :: Maybe TH.Loc
, qsPipe :: Pipe
}
instance Show QState where show _ = "<QState>"
data Msg = forall a . (Binary a, Show a) => Msg (Message a)
getMessage :: Get Msg
getMessage = do
b <- getWord8
case b of
0 -> Msg <$> return Shutdown
1 -> Msg <$> return InitLinker
2 -> Msg <$> LookupSymbol <$> get
3 -> Msg <$> LookupClosure <$> get
4 -> Msg <$> LoadDLL <$> get
5 -> Msg <$> LoadArchive <$> get
6 -> Msg <$> LoadObj <$> get
7 -> Msg <$> UnloadObj <$> get
8 -> Msg <$> AddLibrarySearchPath <$> get
9 -> Msg <$> RemoveLibrarySearchPath <$> get
10 -> Msg <$> return ResolveObjs
11 -> Msg <$> FindSystemLibrary <$> get
12 -> Msg <$> CreateBCOs <$> get
13 -> Msg <$> FreeHValueRefs <$> get
14 -> Msg <$> MallocData <$> get
15 -> Msg <$> (PrepFFI <$> get <*> get <*> get)
16 -> Msg <$> FreeFFI <$> get
17 -> Msg <$> (MkConInfoTable <$> get <*> get <*> get <*> get)
18 -> Msg <$> (EvalStmt <$> get <*> get)
19 -> Msg <$> (ResumeStmt <$> get <*> get)
20 -> Msg <$> (AbandonStmt <$> get)
21 -> Msg <$> (EvalString <$> get)
22 -> Msg <$> (EvalStringToString <$> get <*> get)
23 -> Msg <$> (EvalIO <$> get)
24 -> Msg <$> (MkCostCentre <$> get <*> get <*> get)
25 -> Msg <$> (CostCentreStackInfo <$> get)
26 -> Msg <$> (NewBreakArray <$> get)
27 -> Msg <$> (EnableBreakpoint <$> get <*> get <*> get)
28 -> Msg <$> (BreakpointStatus <$> get <*> get)
29 -> Msg <$> return StartTH
30 -> Msg <$> FinishTH <$> get
31 -> Msg <$> (RunTH <$> get <*> get <*> get <*> get)
32 -> Msg <$> NewName <$> get
33 -> Msg <$> (Report <$> get <*> get)
34 -> Msg <$> (LookupName <$> get <*> get)
35 -> Msg <$> Reify <$> get
36 -> Msg <$> ReifyFixity <$> get
37 -> Msg <$> (ReifyInstances <$> get <*> get)
38 -> Msg <$> ReifyRoles <$> get
39 -> Msg <$> (ReifyAnnotations <$> get <*> get)
40 -> Msg <$> ReifyModule <$> get
41 -> Msg <$> ReifyConStrictness <$> get
42 -> Msg <$> AddDependentFile <$> get
43 -> Msg <$> AddTopDecls <$> get
44 -> Msg <$> (IsExtEnabled <$> get)
45 -> Msg <$> return ExtsEnabled
46 -> Msg <$> return StartRecover
47 -> Msg <$> EndRecover <$> get
48 -> Msg <$> return QDone
49 -> Msg <$> QException <$> get
_ -> Msg <$> QFail <$> get
putMessage :: Message a -> Put
putMessage m = case m of
Shutdown -> putWord8 0
InitLinker -> putWord8 1
LookupSymbol str -> putWord8 2 >> put str
LookupClosure str -> putWord8 3 >> put str
LoadDLL str -> putWord8 4 >> put str
LoadArchive str -> putWord8 5 >> put str
LoadObj str -> putWord8 6 >> put str
UnloadObj str -> putWord8 7 >> put str
AddLibrarySearchPath str -> putWord8 8 >> put str
RemoveLibrarySearchPath ptr -> putWord8 9 >> put ptr
ResolveObjs -> putWord8 10
FindSystemLibrary str -> putWord8 11 >> put str
CreateBCOs bco -> putWord8 12 >> put bco
FreeHValueRefs val -> putWord8 13 >> put val
MallocData bs -> putWord8 14 >> put bs
PrepFFI conv args res -> putWord8 15 >> put conv >> put args >> put res
FreeFFI p -> putWord8 16 >> put p
MkConInfoTable p n t d -> putWord8 17 >> put p >> put n >> put t >> put d
EvalStmt opts val -> putWord8 18 >> put opts >> put val
ResumeStmt opts val -> putWord8 19 >> put opts >> put val
AbandonStmt val -> putWord8 20 >> put val
EvalString val -> putWord8 21 >> put val
EvalStringToString str val -> putWord8 22 >> put str >> put val
EvalIO val -> putWord8 23 >> put val
MkCostCentre mod name src -> putWord8 24 >> put mod >> put name >> put src
CostCentreStackInfo ptr -> putWord8 25 >> put ptr
NewBreakArray sz -> putWord8 26 >> put sz
EnableBreakpoint arr ix b -> putWord8 27 >> put arr >> put ix >> put b
BreakpointStatus arr ix -> putWord8 28 >> put arr >> put ix
StartTH -> putWord8 29
FinishTH val -> putWord8 30 >> put val
RunTH st q loc ty -> putWord8 31 >> put st >> put q >> put loc >> put ty
NewName a -> putWord8 32 >> put a
Report a b -> putWord8 33 >> put a >> put b
LookupName a b -> putWord8 34 >> put a >> put b
Reify a -> putWord8 35 >> put a
ReifyFixity a -> putWord8 36 >> put a
ReifyInstances a b -> putWord8 37 >> put a >> put b
ReifyRoles a -> putWord8 38 >> put a
ReifyAnnotations a b -> putWord8 39 >> put a >> put b
ReifyModule a -> putWord8 40 >> put a
ReifyConStrictness a -> putWord8 41 >> put a
AddDependentFile a -> putWord8 42 >> put a
AddTopDecls a -> putWord8 43 >> put a
IsExtEnabled a -> putWord8 44 >> put a
ExtsEnabled -> putWord8 45
StartRecover -> putWord8 46
EndRecover a -> putWord8 47 >> put a
QDone -> putWord8 48
QException a -> putWord8 49 >> put a
QFail a -> putWord8 50 >> put a
data Pipe = Pipe
{ pipeRead :: Handle
, pipeWrite :: Handle
, pipeLeftovers :: IORef (Maybe ByteString)
}
remoteCall :: Binary a => Pipe -> Message a -> IO a
remoteCall pipe msg = do
writePipe pipe (putMessage msg)
readPipe pipe get
writePipe :: Pipe -> Put -> IO ()
writePipe Pipe{..} put
| LB.null bs = return ()
| otherwise = do
LB.hPut pipeWrite bs
hFlush pipeWrite
where
bs = runPut put
readPipe :: Pipe -> Get a -> IO a
readPipe Pipe{..} get = do
leftovers <- readIORef pipeLeftovers
m <- getBin pipeRead get leftovers
case m of
Nothing -> throw $
mkIOError eofErrorType "GHCi.Message.remoteCall" (Just pipeRead) Nothing
Just (result, new_leftovers) -> do
writeIORef pipeLeftovers new_leftovers
return result
getBin
:: Handle -> Get a -> Maybe ByteString
-> IO (Maybe (a, Maybe ByteString))
getBin h get leftover = go leftover (runGetIncremental get)
where
go Nothing (Done leftover _ msg) =
return (Just (msg, if B.null leftover then Nothing else Just leftover))
go _ Done{} = throwIO (ErrorCall "getBin: Done with leftovers")
go (Just leftover) (Partial fun) = do
go Nothing (fun (Just leftover))
go Nothing (Partial fun) = do
b <- B.hGetSome h (32*1024)
if B.null b
then return Nothing
else go Nothing (fun (Just b))
go _lft (Fail _rest _off str) =
throwIO (ErrorCall ("getBin: " ++ str))