ghci-8.11.0.20200801: The library supporting GHC's interactive interpreter
Safe HaskellNone
LanguageHaskell2010

GHCi.Message

Description

Remote GHCi message types and serialization.

For details on Remote GHCi, see Note [Remote GHCi] in compilerGHCRuntime/Interpreter.hs.

Synopsis

Documentation

data Message a where Source #

A Message a is a message that returns a value of type a. These are requests sent from GHC to the server.

Constructors

Shutdown :: Message ()

Exit the iserv process

RtsRevertCAFs :: 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 :: [ByteString] -> Message [HValueRef]

Create a set of BCO objects, and return HValueRefs to them Note: Each ByteString contains a Binary-encoded [ResolvedBCO], not a ResolvedBCO. The list is to allow us to serialise the ResolvedBCOs in parallel. See createBCOs in compilerGHCRuntime/Interpreter.hs.

FreeHValueRefs :: [HValueRef] -> Message ()

Release HValueRefs

AddSptEntry :: Fingerprint -> HValueRef -> Message ()

Add entries to the Static Pointer Table

MallocData :: ByteString -> Message (RemotePtr ())

Malloc some data and return a RemotePtr to it

MallocStrings :: [ByteString] -> Message [RemotePtr ()] 
PrepFFI :: FFIConv -> [FFIType] -> FFIType -> Message (RemotePtr C_ffi_cif)

Calls prepareForeignCall

FreeFFI :: RemotePtr C_ffi_cif -> Message ()

Free data previously created by PrepFFI

MkConInfoTable :: Bool -> Int -> Int -> Int -> Int -> ByteString -> Message (RemotePtr StgInfoTable)

Create an info table for a constructor

EvalStmt :: EvalOpts -> EvalExpr HValueRef -> Message (EvalStatus [HValueRef])

Evaluate a statement

ResumeStmt :: EvalOpts -> RemoteRef (ResumeContext [HValueRef]) -> Message (EvalStatus [HValueRef])

Resume evaluation of a statement after a breakpoint

AbandonStmt :: RemoteRef (ResumeContext [HValueRef]) -> Message ()

Abandon evaluation of a statement after a breakpoint

EvalString :: HValueRef -> Message (EvalResult String)

Evaluate something of type IO String

EvalStringToString :: HValueRef -> String -> Message (EvalResult String)

Evaluate something of type String -> IO String

EvalIO :: HValueRef -> Message (EvalResult ())

Evaluate something of type IO ()

MkCostCentres :: String -> [(String, String)] -> Message [RemotePtr CostCentre]

Create a set of CostCentres with the same module name

CostCentreStackInfo :: RemotePtr CostCentreStack -> Message [String]

Show a CostCentreStack as a [String]

NewBreakArray :: Int -> Message (RemoteRef BreakArray)

Create a new array of breakpoint flags

EnableBreakpoint :: RemoteRef BreakArray -> Int -> Bool -> Message ()

Enable a breakpoint

BreakpointStatus :: RemoteRef BreakArray -> Int -> Message Bool

Query the status of a breakpoint (True = enabled)

GetBreakpointVar :: HValueRef -> Int -> Message (Maybe HValueRef)

Get a reference to a free variable at a breakpoint

StartTH :: Message (RemoteRef (IORef QState))

Start a new TH module, return a state token that should be

RunTH :: RemoteRef (IORef QState) -> HValueRef -> THResultType -> Maybe Loc -> Message (QResult ByteString)

Evaluate a TH computation.

Returns a ByteString, because we have to force the result before returning it to ensure there are no errors lurking in it. The TH types don't have NFData instances, and even if they did, we have to serialize the value anyway, so we might as well serialize it to force it.

RunModFinalizers :: RemoteRef (IORef QState) -> [RemoteRef (Q ())] -> Message (QResult ())

Run the given mod finalizers.

GetClosure :: HValueRef -> Message (GenClosure HValueRef)

Remote interface to GHC.Exts.Heap.getClosureData. This is used by the GHCi debugger to inspect values in the heap for :print and type reconstruction.

Seq :: HValueRef -> Message (EvalStatus ())

Evaluate something. This is used to support :force in GHCi.

ResumeSeq :: RemoteRef (ResumeContext ()) -> Message (EvalStatus ())

Resume forcing a free variable in a breakpoint (#2950)

Instances

Instances details
Show (Message a) # 
Instance details

Defined in GHCi.Message

data Msg Source #

Constructors

(Binary a, Show a) => Msg (Message a) 

data THMessage a where Source #

Messages sent back to GHC from GHCi.TH, to implement the methods of Quasi. For an overview of how TH works with Remote GHCi, see Note [Remote Template Haskell] in GHCi.TH.

Instances

Instances details
Show (THMessage a) # 
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Defined in GHCi.Message

data THMsg Source #

Constructors

(Binary a, Show a) => THMsg (THMessage a) 

data QResult a Source #

Template Haskell return values

Constructors

QDone a

RunTH finished successfully; return value follows

QException String

RunTH threw an exception

QFail String

RunTH called fail

Instances

Instances details
Show a => Show (QResult a) # 
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Generic (QResult a) # 
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Associated Types

type Rep (QResult a) :: Type -> Type Source #

Methods

from :: QResult a -> Rep (QResult a) x Source #

to :: Rep (QResult a) x -> QResult a Source #

Binary a => Binary (QResult a) # 
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Methods

put :: QResult a -> Put Source #

get :: Get (QResult a) Source #

putList :: [QResult a] -> Put Source #

type Rep (QResult a) # 
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data EvalStatus_ a b Source #

Instances

Instances details
Show a => Show (EvalStatus_ a b) # 
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Generic (EvalStatus_ a b) # 
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Associated Types

type Rep (EvalStatus_ a b) :: Type -> Type Source #

Methods

from :: EvalStatus_ a b -> Rep (EvalStatus_ a b) x Source #

to :: Rep (EvalStatus_ a b) x -> EvalStatus_ a b Source #

Binary a => Binary (EvalStatus_ a b) # 
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type Rep (EvalStatus_ a b) # 
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data EvalResult a Source #

Instances

Instances details
Show a => Show (EvalResult a) # 
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Generic (EvalResult a) # 
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Associated Types

type Rep (EvalResult a) :: Type -> Type Source #

Methods

from :: EvalResult a -> Rep (EvalResult a) x Source #

to :: Rep (EvalResult a) x -> EvalResult a Source #

Binary a => Binary (EvalResult a) # 
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type Rep (EvalResult a) # 
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type Rep (EvalResult a) = D1 ('MetaData "EvalResult" "GHCi.Message" "ghci-8.11.0.20200801" 'False) (C1 ('MetaCons "EvalException" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SerializableException)) :+: C1 ('MetaCons "EvalSuccess" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))

data EvalOpts Source #

Instances

Instances details
Show EvalOpts # 
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Generic EvalOpts # 
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Associated Types

type Rep EvalOpts :: Type -> Type Source #

Binary EvalOpts # 
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type Rep EvalOpts # 
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type Rep EvalOpts = D1 ('MetaData "EvalOpts" "GHCi.Message" "ghci-8.11.0.20200801" 'False) (C1 ('MetaCons "EvalOpts" 'PrefixI 'True) ((S1 ('MetaSel ('Just "useSandboxThread") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool) :*: S1 ('MetaSel ('Just "singleStep") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool)) :*: (S1 ('MetaSel ('Just "breakOnException") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool) :*: S1 ('MetaSel ('Just "breakOnError") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool))))

data EvalExpr a Source #

We can pass simple expressions to EvalStmt, consisting of values and application. This allows us to wrap the statement to be executed in another function, which is used by GHCi to implement :set args and :set prog. It might be worthwhile to extend this little language in the future.

Constructors

EvalThis a 
EvalApp (EvalExpr a) (EvalExpr a) 

Instances

Instances details
Show a => Show (EvalExpr a) # 
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Generic (EvalExpr a) # 
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Associated Types

type Rep (EvalExpr a) :: Type -> Type Source #

Methods

from :: EvalExpr a -> Rep (EvalExpr a) x Source #

to :: Rep (EvalExpr a) x -> EvalExpr a Source #

Binary a => Binary (EvalExpr a) # 
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type Rep (EvalExpr a) # 
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data THResult a Source #

Constructors

THException String 
THComplete a 

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Show a => Show (THResult a) # 
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Generic (THResult a) # 
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Associated Types

type Rep (THResult a) :: Type -> Type Source #

Methods

from :: THResult a -> Rep (THResult a) x Source #

to :: Rep (THResult a) x -> THResult a Source #

Binary a => Binary (THResult a) # 
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type Rep (THResult a) # 
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Defined in GHCi.Message

type Rep (THResult a) = D1 ('MetaData "THResult" "GHCi.Message" "ghci-8.11.0.20200801" 'False) (C1 ('MetaCons "THException" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String)) :+: C1 ('MetaCons "THComplete" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))

data THResultType Source #

Constructors

THExp 
THPat 
THType 
THDec 
THAnnWrapper 

Instances

Instances details
Enum THResultType # 
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Show THResultType # 
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Generic THResultType # 
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Associated Types

type Rep THResultType :: Type -> Type Source #

Binary THResultType # 
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type Rep THResultType # 
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type Rep THResultType = D1 ('MetaData "THResultType" "GHCi.Message" "ghci-8.11.0.20200801" 'False) ((C1 ('MetaCons "THExp" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "THPat" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "THType" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "THDec" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "THAnnWrapper" 'PrefixI 'False) (U1 :: Type -> Type))))

data QState Source #

The server-side Template Haskell state. This is created by the StartTH message. A new one is created per module that GHC typechecks.

Constructors

QState 

Fields

Instances

Instances details
Show QState # 
Instance details

Defined in GHCi.Message

remoteCall :: Binary a => Pipe -> Message a -> IO a Source #

readPipe :: Pipe -> Get a -> IO a Source #

writePipe :: Pipe -> Put -> IO () Source #

Orphan instances

Binary ExitCode # 
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Binary PrimType # 
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Binary StgInfoTable # 
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Binary ClosureType # 
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Binary (Ptr a) # 
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Methods

put :: Ptr a -> Put Source #

get :: Get (Ptr a) Source #

putList :: [Ptr a] -> Put Source #

Binary (FunPtr a) # 
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Methods

put :: FunPtr a -> Put Source #

get :: Get (FunPtr a) Source #

putList :: [FunPtr a] -> Put Source #

Binary a => Binary (GenClosure a) # 
Instance details