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

Binary a => Binary (EvalExpr a) Source #

Instance details

Defined in GHCi.Message

Methods

put :: EvalExpr a -> Put Source #

get :: Get (EvalExpr a) Source #

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

Generic (EvalExpr a) Source #

Instance details

Defined in GHCi.Message

Associated Types

type Rep (EvalExpr a)

Instance details

Defined in GHCi.Message

type Rep (EvalExpr a) = D1 ('MetaData "EvalExpr" "GHCi.Message" "ghci-9.13-inplace" 'False) (C1 ('MetaCons "EvalThis" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)) :+: C1 ('MetaCons "EvalApp" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (EvalExpr a)) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (EvalExpr a))))

Methods

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

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

Show a => Show (EvalExpr a) Source #

Instance details

Defined in GHCi.Message

Methods

showsPrec :: Int -> EvalExpr a -> ShowS #

show :: EvalExpr a -> String #

showList :: [EvalExpr a] -> ShowS #

type Rep (EvalExpr a) Source #

Instance details

Defined in GHCi.Message

resumeStmt :: Interp -> EvalOpts -> ForeignRef (ResumeContext [HValueRef]) -> IO (EvalStatus_ [ForeignHValue] [HValueRef]) Source #

abandonStmt :: Interp -> ForeignRef (ResumeContext [HValueRef]) -> IO () Source #

evalIO :: Interp -> ForeignHValue -> IO () Source #

Execute an action of type IO ()

evalString :: Interp -> ForeignHValue -> IO String Source #

Execute an action of type IO String

evalStringToIOString :: Interp -> ForeignHValue -> String -> IO String Source #

Execute an action of type String -> IO String

mallocData :: Interp -> ByteString -> IO (RemotePtr ()) Source #

Allocate and store the given bytes in memory, returning a pointer to the memory in the remote process.

createBCOs :: Interp -> [ResolvedBCO] -> IO [HValueRef] Source #

Create a set of BCOs that may be mutually recursive.

addSptEntry :: Interp -> Fingerprint -> ForeignHValue -> IO () Source #

mkCostCentres :: Interp -> String -> [(String, String)] -> IO [RemotePtr CostCentre] Source #

costCentreStackInfo :: Interp -> RemotePtr CostCentreStack -> IO [String] Source #

newBreakArray :: Interp -> Int -> IO (ForeignRef BreakArray) Source #

newModuleName :: Interp -> ModuleName -> IO (RemotePtr ModuleName) Source #

storeBreakpoint :: Interp -> ForeignRef BreakArray -> Int -> Int -> IO () Source #

breakpointStatus :: Interp -> ForeignRef BreakArray -> Int -> IO Bool Source #

getBreakpointVar :: Interp -> ForeignHValue -> Int -> IO (Maybe ForeignHValue) Source #

getClosure :: Interp -> ForeignHValue -> IO (GenClosure ForeignHValue) Source #

getModBreaks :: HomeModInfo -> ModBreaks Source #

seqHValue :: Interp -> UnitEnv -> ForeignHValue -> IO (EvalResult ()) Source #

Send a Seq message to the iserv process to force a value #2950

evalBreakpointToId :: HomePackageTable -> EvalBreakpoint -> InternalBreakpointId Source #

interpreterDynamic :: Interp -> Bool Source #

Interpreter uses Dynamic way

interpreterProfiled :: Interp -> Bool Source #

Interpreter uses Profiling way

The object-code linker

initObjLinker :: Interp -> IO () Source #

lookupSymbol :: Interp -> FastString -> IO (Maybe (Ptr ())) Source #

lookupSymbolInDLL :: Interp -> RemotePtr LoadedDLL -> FastString -> IO (Maybe (Ptr ())) Source #

lookupClosure :: Interp -> String -> IO (Maybe HValueRef) Source #

loadDLL :: Interp -> String -> IO (Either String (RemotePtr LoadedDLL)) Source #

loadDLL loads a dynamic library using the OS's native linker (i.e. dlopen() on Unix, LoadLibrary() on Windows). It takes either an absolute pathname to the file, or a relative filename (e.g. "libfoo.so" or "foo.dll"). In the latter case, loadDLL searches the standard locations for the appropriate library.

loadArchive :: Interp -> String -> IO () Source #

loadObj :: Interp -> String -> IO () Source #

unloadObj :: Interp -> String -> IO () Source #

addLibrarySearchPath :: Interp -> String -> IO (Ptr ()) Source #

removeLibrarySearchPath :: Interp -> Ptr () -> IO Bool Source #

resolveObjs :: Interp -> IO SuccessFlag Source #

findSystemLibrary :: Interp -> String -> IO (Maybe String) Source #

interpCmd :: Binary a => Interp -> Message a -> IO a Source #

Run a command in the interpreter's context. With -fexternal-interpreter, the command is serialized and sent to an external iserv process, and the response is deserialized (hence the Binary constraint). With -fno-external-interpreter we execute the command directly here.

withExtInterp :: ExceptionMonad m => ExtInterp -> (forall d. ExtInterpInstance d -> m a) -> m a Source #

withExtInterpStatus :: forall {k} m (a :: k). ExtInterp -> (forall d. ExtInterpStatusVar d -> m a) -> m a Source #

withIServ :: ExceptionMonad m => IServ -> (ExtInterpInstance () -> m a) -> m a Source #

Grab a lock on the IServ and do something with it. Overloaded because this is used from TcM as well as IO.

withJSInterp :: ExceptionMonad m => JSInterp -> (ExtInterpInstance JSInterpExtra -> m a) -> m a Source #

Spawn JS interpreter if it isn't already running and execute the given action

Update the interpreter state.

stopInterp :: Interp -> IO () Source #

Stop the interpreter

purgeLookupSymbolCache :: Interp -> IO () Source #

freeReallyRemoteRef :: ExtInterpInstance d -> RemoteRef a -> IO () Source #

freeHValueRefs :: Interp -> [HValueRef] -> IO () Source #

mkFinalizedHValue :: Interp -> RemoteRef a -> IO (ForeignRef a) Source #

Creates a ForeignRef that will automatically release the RemoteRef when it is no longer referenced.

wormhole :: Interp -> ForeignRef a -> IO a Source #

Convert a ForeignRef to the value it references directly. This only works when the interpreter is running in the same process as the compiler, so it fails when -fexternal-interpreter is on.

wormholeRef :: Interp -> RemoteRef a -> IO a Source #

Convert an RemoteRef to the value it references directly. This only works when the interpreter is running in the same process as the compiler, so it fails when -fexternal-interpreter is on.

fromEvalResult :: EvalResult a -> IO a Source #

Reexport for convenience

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 ()))
LookupSymbolInDLL :: RemotePtr LoadedDLL -> String -> Message (Maybe (RemotePtr ()))
LookupClosure :: String -> Message (Maybe HValueRef)
LoadDLL :: String -> Message (Either String (RemotePtr LoadedDLL))
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]	Create a set of BCO objects, and return HValueRefs to them See `createBCOs` in compilerGHCRuntime/Interpreter.hs. NB: this has a custom Binary behavior, see Note [Parallelize CreateBCOs serialization]
FreeHValueRefs :: [HValueRef] -> Message ()	Release `HValueRef`s
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 :: [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] [HValueRef])	Evaluate a statement
ResumeStmt :: EvalOpts -> RemoteRef (ResumeContext [HValueRef]) -> Message (EvalStatus_ [HValueRef] [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
SetupBreakpoint :: RemoteRef BreakArray -> Int -> Int -> Message ()	Set how many times a breakpoint should be ignored also used for enable/disable
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)
NewBreakModule :: String -> Message (RemotePtr BreakModule)	Allocate a string for a breakpoint module name. This uses an empty dummy type because `ModuleName` isn't available here.

Instances

Instances details

Show (Message a) Source #
Instance details Defined in GHCi.Message Methods showsPrec :: Int -> Message a -> ShowS # show :: Message a -> String # showList :: [Message a] -> ShowS #

module GHC.Runtime.Interpreter.Process