{-# LANGUAGE CPP #-}
{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TupleSections #-}

-- | Interacting with the iserv interpreter, whether it is running on an
-- external process or in the current process.
--
module GHC.Runtime.Interpreter
  ( module GHC.Runtime.Interpreter.Types

  -- * High-level interface to the interpreter
  , BCOOpts (..)
  , evalStmt, EvalStatus_(..), EvalStatus, EvalResult(..), EvalExpr(..)
  , resumeStmt
  , abandonStmt
  , evalIO
  , evalString
  , evalStringToIOString
  , mallocData
  , createBCOs
  , addSptEntry
  , mkCostCentres
  , costCentreStackInfo
  , newBreakArray
  , storeBreakpoint
  , breakpointStatus
  , getBreakpointVar
  , getClosure
  , getModBreaks
  , seqHValue
  , interpreterDynamic
  , interpreterProfiled

  -- * The object-code linker
  , initObjLinker
  , lookupSymbol
  , lookupClosure
  , loadDLL
  , loadArchive
  , loadObj
  , unloadObj
  , addLibrarySearchPath
  , removeLibrarySearchPath
  , resolveObjs
  , findSystemLibrary

  -- * Lower-level API using messages
  , interpCmd, Message(..), withIServ, withIServ_
  , stopInterp
  , iservCall, readIServ, writeIServ
  , purgeLookupSymbolCache
  , freeHValueRefs
  , mkFinalizedHValue
  , wormhole, wormholeRef
  , fromEvalResult
  ) where

import GHC.Prelude

import GHC.IO (catchException)

import GHC.Runtime.Interpreter.Types
import GHCi.Message
import GHCi.RemoteTypes
import GHCi.ResolvedBCO
import GHCi.BreakArray (BreakArray)
import GHC.Types.BreakInfo (BreakInfo(..))
import GHC.ByteCode.Types

import GHC.Linker.Types

import GHC.Data.Maybe
import GHC.Data.FastString

import GHC.Types.Unique
import GHC.Types.SrcLoc
import GHC.Types.Unique.FM
import GHC.Types.Basic

import GHC.Utils.Panic
import GHC.Utils.Exception as Ex
import GHC.Utils.Outputable(brackets, ppr, showSDocUnsafe)
import GHC.Utils.Fingerprint
import GHC.Utils.Misc

import GHC.Unit.Module
import GHC.Unit.Module.ModIface
import GHC.Unit.Home.ModInfo
import GHC.Unit.Env

#if defined(HAVE_INTERNAL_INTERPRETER)
import GHCi.Run
import GHC.Platform.Ways
#endif

import Control.Concurrent
import Control.Monad
import Control.Monad.IO.Class
import Control.Monad.Catch as MC (mask, onException)
import Data.Binary
import Data.Binary.Put
import Data.ByteString (ByteString)
import qualified Data.ByteString.Lazy as LB
import Data.Array ((!))
import Data.IORef
import Foreign hiding (void)
import qualified GHC.Exts.Heap as Heap
import GHC.Stack.CCS (CostCentre,CostCentreStack)
import System.Exit
import GHC.IO.Handle.Types (Handle)
#if defined(mingw32_HOST_OS)
import Foreign.C
import GHC.IO.Handle.FD (fdToHandle)
# if defined(__IO_MANAGER_WINIO__)
import GHC.IO.SubSystem ((<!>))
import GHC.IO.Handle.Windows (handleToHANDLE)
import GHC.Event.Windows (associateHandle')
# endif
#else
import System.Posix as Posix
#endif
import System.Directory
import System.Process
import GHC.Conc (pseq, par)

{- Note [Remote GHCi]
   ~~~~~~~~~~~~~~~~~~
When the flag -fexternal-interpreter is given to GHC, interpreted code
is run in a separate process called iserv, and we communicate with the
external process over a pipe using Binary-encoded messages.

Motivation
~~~~~~~~~~

When the interpreted code is running in a separate process, it can
use a different "way", e.g. profiled or dynamic.  This means

- compiling Template Haskell code with -prof does not require
  building the code without -prof first

- when GHC itself is profiled, it can interpret unprofiled code,
  and the same applies to dynamic linking.

- An unprofiled GHCi can load and run profiled code, which means it
  can use the stack-trace functionality provided by profiling without
  taking the performance hit on the compiler that profiling would
  entail.

For other reasons see remote-GHCi on the wiki.

Implementation Overview
~~~~~~~~~~~~~~~~~~~~~~~

The main pieces are:

- libraries/ghci, containing:
  - types for talking about remote values (GHCi.RemoteTypes)
  - the message protocol (GHCi.Message),
  - implementation of the messages (GHCi.Run)
  - implementation of Template Haskell (GHCi.TH)
  - a few other things needed to run interpreted code

- top-level iserv directory, containing the codefor the external
  server.  This is a fairly simple wrapper, most of the functionality
  is provided by modules in libraries/ghci.

- This module which provides the interface to the server used
  by the rest of GHC.

GHC works with and without -fexternal-interpreter.  With the flag, all
interpreted code is run by the iserv binary.  Without the flag,
interpreted code is run in the same process as GHC.

Things that do not work with -fexternal-interpreter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

dynCompileExpr cannot work, because we have no way to run code of an
unknown type in the remote process.  This API fails with an error
message if it is used with -fexternal-interpreter.

Other Notes on Remote GHCi
~~~~~~~~~~~~~~~~~~~~~~~~~~
  * This wiki page has an implementation overview:
    https://gitlab.haskell.org/ghc/ghc/wikis/commentary/compiler/external-interpreter
  * Note [External GHCi pointers] in "GHC.Runtime.Interpreter"
  * Note [Remote Template Haskell] in libraries/ghci/GHCi/TH.hs
-}


-- | 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.
interpCmd :: Binary a => Interp -> Message a -> IO a
interpCmd :: forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp Message a
msg = case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
  InterpInstance
InternalInterp     -> Message a -> IO a
forall a. Message a -> IO a
run Message a
msg -- Just run it directly
#endif
  ExternalInterp IServConfig
c IServ
i -> IServConfig -> IServ -> (IServInstance -> IO a) -> IO a
forall (m :: * -> *) a.
(MonadIO m, ExceptionMonad m) =>
IServConfig -> IServ -> (IServInstance -> m a) -> m a
withIServ_ IServConfig
c IServ
i ((IServInstance -> IO a) -> IO a)
-> (IServInstance -> IO a) -> IO a
forall a b. (a -> b) -> a -> b
$ \IServInstance
iserv ->
    IO a -> IO a
forall a. IO a -> IO a
uninterruptibleMask_ (IO a -> IO a) -> IO a -> IO a
forall a b. (a -> b) -> a -> b
$ -- Note [uninterruptibleMask_ and interpCmd]
      IServInstance -> Message a -> IO a
forall a. Binary a => IServInstance -> Message a -> IO a
iservCall IServInstance
iserv Message a
msg


-- Note [uninterruptibleMask_ and interpCmd]
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- If we receive an async exception, such as ^C, while communicating
-- with the iserv process then we will be out-of-sync and not be able
-- to recover.  Thus we use uninterruptibleMask_ during
-- communication.  A ^C will be delivered to the iserv process (because
-- signals get sent to the whole process group) which will interrupt
-- the running computation and return an EvalException result.

-- | Grab a lock on the 'IServ' and do something with it.
-- Overloaded because this is used from TcM as well as IO.
withIServ
  :: (ExceptionMonad m)
  => IServConfig -> IServ -> (IServInstance -> m (IServInstance, a)) -> m a
withIServ :: forall (m :: * -> *) a.
ExceptionMonad m =>
IServConfig
-> IServ -> (IServInstance -> m (IServInstance, a)) -> m a
withIServ IServConfig
conf (IServ MVar IServState
mIServState) IServInstance -> m (IServInstance, a)
action =
  ((forall a. m a -> m a) -> m a) -> m a
forall b. ((forall a. m a -> m a) -> m b) -> m b
forall (m :: * -> *) b.
MonadMask m =>
((forall a. m a -> m a) -> m b) -> m b
MC.mask (((forall a. m a -> m a) -> m a) -> m a)
-> ((forall a. m a -> m a) -> m a) -> m a
forall a b. (a -> b) -> a -> b
$ \forall a. m a -> m a
restore -> do
    IServState
state <- IO IServState -> m IServState
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO IServState -> m IServState) -> IO IServState -> m IServState
forall a b. (a -> b) -> a -> b
$ MVar IServState -> IO IServState
forall a. MVar a -> IO a
takeMVar MVar IServState
mIServState

    IServInstance
iserv <- case IServState
state of
      -- start the external iserv process if we haven't done so yet
      IServState
IServPending ->
         IO IServInstance -> m IServInstance
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IServConfig -> IO IServInstance
spawnIServ IServConfig
conf)
           m IServInstance -> m () -> m IServInstance
forall (m :: * -> *) a b. MonadCatch m => m a -> m b -> m a
`MC.onException` (IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ MVar IServState -> IServState -> IO ()
forall a. MVar a -> a -> IO ()
putMVar MVar IServState
mIServState IServState
state)

      IServRunning IServInstance
inst -> IServInstance -> m IServInstance
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return IServInstance
inst


    let iserv' :: IServInstance
iserv'  = IServInstance
iserv{ iservPendingFrees = [] }

    (IServInstance
iserv'',a
a) <- (do
      -- free any ForeignHValues that have been garbage collected.
      IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ Bool -> IO () -> IO ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (Bool -> Bool
not ([HValueRef] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null (IServInstance -> [HValueRef]
iservPendingFrees IServInstance
iserv))) (IO () -> IO ()) -> IO () -> IO ()
forall a b. (a -> b) -> a -> b
$
        IServInstance -> Message () -> IO ()
forall a. Binary a => IServInstance -> Message a -> IO a
iservCall IServInstance
iserv ([HValueRef] -> Message ()
FreeHValueRefs (IServInstance -> [HValueRef]
iservPendingFrees IServInstance
iserv))
      -- run the inner action
      m (IServInstance, a) -> m (IServInstance, a)
forall a. m a -> m a
restore (m (IServInstance, a) -> m (IServInstance, a))
-> m (IServInstance, a) -> m (IServInstance, a)
forall a b. (a -> b) -> a -> b
$ IServInstance -> m (IServInstance, a)
action IServInstance
iserv')
          m (IServInstance, a) -> m () -> m (IServInstance, a)
forall (m :: * -> *) a b. MonadCatch m => m a -> m b -> m a
`MC.onException` (IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ MVar IServState -> IServState -> IO ()
forall a. MVar a -> a -> IO ()
putMVar MVar IServState
mIServState (IServInstance -> IServState
IServRunning IServInstance
iserv'))
    IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ MVar IServState -> IServState -> IO ()
forall a. MVar a -> a -> IO ()
putMVar MVar IServState
mIServState (IServInstance -> IServState
IServRunning IServInstance
iserv'')
    a -> m a
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return a
a

withIServ_
  :: (MonadIO m, ExceptionMonad m)
  => IServConfig -> IServ -> (IServInstance -> m a) -> m a
withIServ_ :: forall (m :: * -> *) a.
(MonadIO m, ExceptionMonad m) =>
IServConfig -> IServ -> (IServInstance -> m a) -> m a
withIServ_ IServConfig
conf IServ
iserv IServInstance -> m a
action = IServConfig
-> IServ -> (IServInstance -> m (IServInstance, a)) -> m a
forall (m :: * -> *) a.
ExceptionMonad m =>
IServConfig
-> IServ -> (IServInstance -> m (IServInstance, a)) -> m a
withIServ IServConfig
conf IServ
iserv ((IServInstance -> m (IServInstance, a)) -> m a)
-> (IServInstance -> m (IServInstance, a)) -> m a
forall a b. (a -> b) -> a -> b
$ \IServInstance
inst ->
   (IServInstance
inst,) (a -> (IServInstance, a)) -> m a -> m (IServInstance, a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> IServInstance -> m a
action IServInstance
inst

-- -----------------------------------------------------------------------------
-- Wrappers around messages

-- | Execute an action of type @IO [a]@, returning 'ForeignHValue's for
-- each of the results.
evalStmt
  :: Interp
  -> EvalOpts
  -> EvalExpr ForeignHValue
  -> IO (EvalStatus_ [ForeignHValue] [HValueRef])
evalStmt :: Interp
-> EvalOpts
-> EvalExpr ForeignHValue
-> IO (EvalStatus_ [ForeignHValue] [HValueRef])
evalStmt Interp
interp EvalOpts
opts EvalExpr ForeignHValue
foreign_expr = do
  EvalStatus_ [HValueRef] [HValueRef]
status <- EvalExpr ForeignHValue
-> (EvalExpr HValueRef -> IO (EvalStatus_ [HValueRef] [HValueRef]))
-> IO (EvalStatus_ [HValueRef] [HValueRef])
forall a.
EvalExpr ForeignHValue -> (EvalExpr HValueRef -> IO a) -> IO a
withExpr EvalExpr ForeignHValue
foreign_expr ((EvalExpr HValueRef -> IO (EvalStatus_ [HValueRef] [HValueRef]))
 -> IO (EvalStatus_ [HValueRef] [HValueRef]))
-> (EvalExpr HValueRef -> IO (EvalStatus_ [HValueRef] [HValueRef]))
-> IO (EvalStatus_ [HValueRef] [HValueRef])
forall a b. (a -> b) -> a -> b
$ \EvalExpr HValueRef
expr ->
    Interp
-> Message (EvalStatus_ [HValueRef] [HValueRef])
-> IO (EvalStatus_ [HValueRef] [HValueRef])
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (EvalOpts
-> EvalExpr HValueRef
-> Message (EvalStatus_ [HValueRef] [HValueRef])
EvalStmt EvalOpts
opts EvalExpr HValueRef
expr)
  Interp
-> EvalStatus_ [HValueRef] [HValueRef]
-> IO (EvalStatus_ [ForeignHValue] [HValueRef])
handleEvalStatus Interp
interp EvalStatus_ [HValueRef] [HValueRef]
status
 where
  withExpr :: EvalExpr ForeignHValue -> (EvalExpr HValueRef -> IO a) -> IO a
  withExpr :: forall a.
EvalExpr ForeignHValue -> (EvalExpr HValueRef -> IO a) -> IO a
withExpr (EvalThis ForeignHValue
fhv) EvalExpr HValueRef -> IO a
cont =
    ForeignHValue -> (HValueRef -> IO a) -> IO a
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
fhv ((HValueRef -> IO a) -> IO a) -> (HValueRef -> IO a) -> IO a
forall a b. (a -> b) -> a -> b
$ \HValueRef
hvref -> EvalExpr HValueRef -> IO a
cont (HValueRef -> EvalExpr HValueRef
forall a. a -> EvalExpr a
EvalThis HValueRef
hvref)
  withExpr (EvalApp EvalExpr ForeignHValue
fl EvalExpr ForeignHValue
fr) EvalExpr HValueRef -> IO a
cont =
    EvalExpr ForeignHValue -> (EvalExpr HValueRef -> IO a) -> IO a
forall a.
EvalExpr ForeignHValue -> (EvalExpr HValueRef -> IO a) -> IO a
withExpr EvalExpr ForeignHValue
fl ((EvalExpr HValueRef -> IO a) -> IO a)
-> (EvalExpr HValueRef -> IO a) -> IO a
forall a b. (a -> b) -> a -> b
$ \EvalExpr HValueRef
fl' ->
    EvalExpr ForeignHValue -> (EvalExpr HValueRef -> IO a) -> IO a
forall a.
EvalExpr ForeignHValue -> (EvalExpr HValueRef -> IO a) -> IO a
withExpr EvalExpr ForeignHValue
fr ((EvalExpr HValueRef -> IO a) -> IO a)
-> (EvalExpr HValueRef -> IO a) -> IO a
forall a b. (a -> b) -> a -> b
$ \EvalExpr HValueRef
fr' ->
    EvalExpr HValueRef -> IO a
cont (EvalExpr HValueRef -> EvalExpr HValueRef -> EvalExpr HValueRef
forall a. EvalExpr a -> EvalExpr a -> EvalExpr a
EvalApp EvalExpr HValueRef
fl' EvalExpr HValueRef
fr')

resumeStmt
  :: Interp
  -> EvalOpts
  -> ForeignRef (ResumeContext [HValueRef])
  -> IO (EvalStatus_ [ForeignHValue] [HValueRef])
resumeStmt :: Interp
-> EvalOpts
-> ForeignRef (ResumeContext [HValueRef])
-> IO (EvalStatus_ [ForeignHValue] [HValueRef])
resumeStmt Interp
interp EvalOpts
opts ForeignRef (ResumeContext [HValueRef])
resume_ctxt = do
  EvalStatus_ [HValueRef] [HValueRef]
status <- ForeignRef (ResumeContext [HValueRef])
-> (RemoteRef (ResumeContext [HValueRef])
    -> IO (EvalStatus_ [HValueRef] [HValueRef]))
-> IO (EvalStatus_ [HValueRef] [HValueRef])
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignRef (ResumeContext [HValueRef])
resume_ctxt ((RemoteRef (ResumeContext [HValueRef])
  -> IO (EvalStatus_ [HValueRef] [HValueRef]))
 -> IO (EvalStatus_ [HValueRef] [HValueRef]))
-> (RemoteRef (ResumeContext [HValueRef])
    -> IO (EvalStatus_ [HValueRef] [HValueRef]))
-> IO (EvalStatus_ [HValueRef] [HValueRef])
forall a b. (a -> b) -> a -> b
$ \RemoteRef (ResumeContext [HValueRef])
rhv ->
    Interp
-> Message (EvalStatus_ [HValueRef] [HValueRef])
-> IO (EvalStatus_ [HValueRef] [HValueRef])
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (EvalOpts
-> RemoteRef (ResumeContext [HValueRef])
-> Message (EvalStatus_ [HValueRef] [HValueRef])
ResumeStmt EvalOpts
opts RemoteRef (ResumeContext [HValueRef])
rhv)
  Interp
-> EvalStatus_ [HValueRef] [HValueRef]
-> IO (EvalStatus_ [ForeignHValue] [HValueRef])
handleEvalStatus Interp
interp EvalStatus_ [HValueRef] [HValueRef]
status

abandonStmt :: Interp -> ForeignRef (ResumeContext [HValueRef]) -> IO ()
abandonStmt :: Interp -> ForeignRef (ResumeContext [HValueRef]) -> IO ()
abandonStmt Interp
interp ForeignRef (ResumeContext [HValueRef])
resume_ctxt =
  ForeignRef (ResumeContext [HValueRef])
-> (RemoteRef (ResumeContext [HValueRef]) -> IO ()) -> IO ()
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignRef (ResumeContext [HValueRef])
resume_ctxt ((RemoteRef (ResumeContext [HValueRef]) -> IO ()) -> IO ())
-> (RemoteRef (ResumeContext [HValueRef]) -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \RemoteRef (ResumeContext [HValueRef])
rhv ->
    Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (RemoteRef (ResumeContext [HValueRef]) -> Message ()
AbandonStmt RemoteRef (ResumeContext [HValueRef])
rhv)

handleEvalStatus
  :: Interp
  -> EvalStatus [HValueRef]
  -> IO (EvalStatus_ [ForeignHValue] [HValueRef])
handleEvalStatus :: Interp
-> EvalStatus_ [HValueRef] [HValueRef]
-> IO (EvalStatus_ [ForeignHValue] [HValueRef])
handleEvalStatus Interp
interp EvalStatus_ [HValueRef] [HValueRef]
status =
  case EvalStatus_ [HValueRef] [HValueRef]
status of
    EvalBreak Bool
a HValueRef
b Int
c Int
d RemoteRef (ResumeContext [HValueRef])
e RemotePtr CostCentreStack
f -> EvalStatus_ [ForeignHValue] [HValueRef]
-> IO (EvalStatus_ [ForeignHValue] [HValueRef])
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Bool
-> HValueRef
-> Int
-> Int
-> RemoteRef (ResumeContext [HValueRef])
-> RemotePtr CostCentreStack
-> EvalStatus_ [ForeignHValue] [HValueRef]
forall a b.
Bool
-> HValueRef
-> Int
-> Int
-> RemoteRef (ResumeContext b)
-> RemotePtr CostCentreStack
-> EvalStatus_ a b
EvalBreak Bool
a HValueRef
b Int
c Int
d RemoteRef (ResumeContext [HValueRef])
e RemotePtr CostCentreStack
f)
    EvalComplete Word64
alloc EvalResult [HValueRef]
res ->
      Word64
-> EvalResult [ForeignHValue]
-> EvalStatus_ [ForeignHValue] [HValueRef]
forall a b. Word64 -> EvalResult a -> EvalStatus_ a b
EvalComplete Word64
alloc (EvalResult [ForeignHValue]
 -> EvalStatus_ [ForeignHValue] [HValueRef])
-> IO (EvalResult [ForeignHValue])
-> IO (EvalStatus_ [ForeignHValue] [HValueRef])
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> EvalResult [HValueRef] -> IO (EvalResult [ForeignHValue])
addFinalizer EvalResult [HValueRef]
res
 where
  addFinalizer :: EvalResult [HValueRef] -> IO (EvalResult [ForeignHValue])
addFinalizer (EvalException SerializableException
e) = EvalResult [ForeignHValue] -> IO (EvalResult [ForeignHValue])
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (SerializableException -> EvalResult [ForeignHValue]
forall a. SerializableException -> EvalResult a
EvalException SerializableException
e)
  addFinalizer (EvalSuccess [HValueRef]
rs)  =
    [ForeignHValue] -> EvalResult [ForeignHValue]
forall a. a -> EvalResult a
EvalSuccess ([ForeignHValue] -> EvalResult [ForeignHValue])
-> IO [ForeignHValue] -> IO (EvalResult [ForeignHValue])
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (HValueRef -> IO ForeignHValue)
-> [HValueRef] -> IO [ForeignHValue]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM (Interp -> HValueRef -> IO ForeignHValue
forall a. Interp -> RemoteRef a -> IO (ForeignRef a)
mkFinalizedHValue Interp
interp) [HValueRef]
rs

-- | Execute an action of type @IO ()@
evalIO :: Interp -> ForeignHValue -> IO ()
evalIO :: Interp -> ForeignHValue -> IO ()
evalIO Interp
interp ForeignHValue
fhv =
  IO () -> IO ()
forall a. IO a -> IO a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> IO ()) -> IO () -> IO ()
forall a b. (a -> b) -> a -> b
$ ForeignHValue -> (HValueRef -> IO ()) -> IO ()
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
fhv ((HValueRef -> IO ()) -> IO ()) -> (HValueRef -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \HValueRef
fhv ->
    Interp -> Message (EvalResult ()) -> IO (EvalResult ())
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (HValueRef -> Message (EvalResult ())
EvalIO HValueRef
fhv) IO (EvalResult ()) -> (EvalResult () -> IO ()) -> IO ()
forall a b. IO a -> (a -> IO b) -> IO b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= EvalResult () -> IO ()
forall a. EvalResult a -> IO a
fromEvalResult

-- | Execute an action of type @IO String@
evalString :: Interp -> ForeignHValue -> IO String
evalString :: Interp -> ForeignHValue -> IO String
evalString Interp
interp ForeignHValue
fhv =
  IO String -> IO String
forall a. IO a -> IO a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO String -> IO String) -> IO String -> IO String
forall a b. (a -> b) -> a -> b
$ ForeignHValue -> (HValueRef -> IO String) -> IO String
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
fhv ((HValueRef -> IO String) -> IO String)
-> (HValueRef -> IO String) -> IO String
forall a b. (a -> b) -> a -> b
$ \HValueRef
fhv ->
    Interp -> Message (EvalResult String) -> IO (EvalResult String)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (HValueRef -> Message (EvalResult String)
EvalString HValueRef
fhv) IO (EvalResult String)
-> (EvalResult String -> IO String) -> IO String
forall a b. IO a -> (a -> IO b) -> IO b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= EvalResult String -> IO String
forall a. EvalResult a -> IO a
fromEvalResult

-- | Execute an action of type @String -> IO String@
evalStringToIOString :: Interp -> ForeignHValue -> String -> IO String
evalStringToIOString :: Interp -> ForeignHValue -> String -> IO String
evalStringToIOString Interp
interp ForeignHValue
fhv String
str =
  IO String -> IO String
forall a. IO a -> IO a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO String -> IO String) -> IO String -> IO String
forall a b. (a -> b) -> a -> b
$ ForeignHValue -> (HValueRef -> IO String) -> IO String
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
fhv ((HValueRef -> IO String) -> IO String)
-> (HValueRef -> IO String) -> IO String
forall a b. (a -> b) -> a -> b
$ \HValueRef
fhv ->
    Interp -> Message (EvalResult String) -> IO (EvalResult String)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (HValueRef -> String -> Message (EvalResult String)
EvalStringToString HValueRef
fhv String
str) IO (EvalResult String)
-> (EvalResult String -> IO String) -> IO String
forall a b. IO a -> (a -> IO b) -> IO b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= EvalResult String -> IO String
forall a. EvalResult a -> IO a
fromEvalResult


-- | Allocate and store the given bytes in memory, returning a pointer
-- to the memory in the remote process.
mallocData :: Interp -> ByteString -> IO (RemotePtr ())
mallocData :: Interp -> ByteString -> IO (RemotePtr ())
mallocData Interp
interp ByteString
bs = Interp -> Message (RemotePtr ()) -> IO (RemotePtr ())
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (ByteString -> Message (RemotePtr ())
MallocData ByteString
bs)

mkCostCentres :: Interp -> String -> [(String,String)] -> IO [RemotePtr CostCentre]
mkCostCentres :: Interp -> String -> [(String, String)] -> IO [RemotePtr CostCentre]
mkCostCentres Interp
interp String
mod [(String, String)]
ccs =
  Interp
-> Message [RemotePtr CostCentre] -> IO [RemotePtr CostCentre]
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> [(String, String)] -> Message [RemotePtr CostCentre]
MkCostCentres String
mod [(String, String)]
ccs)

newtype BCOOpts = BCOOpts
  { BCOOpts -> Int
bco_n_jobs :: Int -- ^ Number of parallel jobs doing BCO serialization
  }

-- | Create a set of BCOs that may be mutually recursive.
createBCOs :: Interp -> BCOOpts -> [ResolvedBCO] -> IO [HValueRef]
createBCOs :: Interp -> BCOOpts -> [ResolvedBCO] -> IO [HValueRef]
createBCOs Interp
interp BCOOpts
opts [ResolvedBCO]
rbcos = do
  let n_jobs :: Int
n_jobs = BCOOpts -> Int
bco_n_jobs BCOOpts
opts
  -- Serializing ResolvedBCO is expensive, so if we support doing it in parallel
  if (Int
n_jobs Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
1)
    then
      Interp -> Message [HValueRef] -> IO [HValueRef]
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp ([ByteString] -> Message [HValueRef]
CreateBCOs [Put -> ByteString
runPut ([ResolvedBCO] -> Put
forall t. Binary t => t -> Put
put [ResolvedBCO]
rbcos)])
    else do
      Int
old_caps <- IO Int
getNumCapabilities
      if Int
old_caps Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
n_jobs
         then IO [ByteString] -> IO ()
forall (f :: * -> *) a. Functor f => f a -> f ()
void (IO [ByteString] -> IO ()) -> IO [ByteString] -> IO ()
forall a b. (a -> b) -> a -> b
$ [ByteString] -> IO [ByteString]
forall a. a -> IO a
evaluate [ByteString]
puts
         else IO () -> IO () -> IO () -> IO ()
forall a b c. IO a -> IO b -> IO c -> IO c
bracket_ (Int -> IO ()
setNumCapabilities Int
n_jobs)
                       (Int -> IO ()
setNumCapabilities Int
old_caps)
                       (IO [ByteString] -> IO ()
forall (f :: * -> *) a. Functor f => f a -> f ()
void (IO [ByteString] -> IO ()) -> IO [ByteString] -> IO ()
forall a b. (a -> b) -> a -> b
$ [ByteString] -> IO [ByteString]
forall a. a -> IO a
evaluate [ByteString]
puts)
      Interp -> Message [HValueRef] -> IO [HValueRef]
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp ([ByteString] -> Message [HValueRef]
CreateBCOs [ByteString]
puts)
 where
  puts :: [ByteString]
puts = ([ResolvedBCO] -> ByteString) -> [[ResolvedBCO]] -> [ByteString]
forall {t} {a}. (t -> a) -> [t] -> [a]
parMap [ResolvedBCO] -> ByteString
forall {t}. Binary t => t -> ByteString
doChunk (Int -> [ResolvedBCO] -> [[ResolvedBCO]]
forall a. Int -> [a] -> [[a]]
chunkList Int
100 [ResolvedBCO]
rbcos)

  -- make sure we force the whole lazy ByteString
  doChunk :: t -> ByteString
doChunk t
c = Int64 -> ByteString -> ByteString
forall a b. a -> b -> b
pseq (ByteString -> Int64
LB.length ByteString
bs) ByteString
bs
    where bs :: ByteString
bs = Put -> ByteString
runPut (t -> Put
forall t. Binary t => t -> Put
put t
c)

  -- We don't have the parallel package, so roll our own simple parMap
  parMap :: (t -> a) -> [t] -> [a]
parMap t -> a
_ [] = []
  parMap t -> a
f (t
x:[t]
xs) = a
fx a -> [a] -> [a]
forall a b. a -> b -> b
`par` ([a]
fxs [a] -> [a] -> [a]
forall a b. a -> b -> b
`pseq` (a
fx a -> [a] -> [a]
forall a. a -> [a] -> [a]
: [a]
fxs))
    where fx :: a
fx = t -> a
f t
x; fxs :: [a]
fxs = (t -> a) -> [t] -> [a]
parMap t -> a
f [t]
xs

addSptEntry :: Interp -> Fingerprint -> ForeignHValue -> IO ()
addSptEntry :: Interp -> Fingerprint -> ForeignHValue -> IO ()
addSptEntry Interp
interp Fingerprint
fpr ForeignHValue
ref =
  ForeignHValue -> (HValueRef -> IO ()) -> IO ()
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
ref ((HValueRef -> IO ()) -> IO ()) -> (HValueRef -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \HValueRef
val ->
    Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (Fingerprint -> HValueRef -> Message ()
AddSptEntry Fingerprint
fpr HValueRef
val)

costCentreStackInfo :: Interp -> RemotePtr CostCentreStack -> IO [String]
costCentreStackInfo :: Interp -> RemotePtr CostCentreStack -> IO [String]
costCentreStackInfo Interp
interp RemotePtr CostCentreStack
ccs =
  Interp -> Message [String] -> IO [String]
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (RemotePtr CostCentreStack -> Message [String]
CostCentreStackInfo RemotePtr CostCentreStack
ccs)

newBreakArray :: Interp -> Int -> IO (ForeignRef BreakArray)
newBreakArray :: Interp -> Int -> IO (ForeignRef BreakArray)
newBreakArray Interp
interp Int
size = do
  RemoteRef BreakArray
breakArray <- Interp
-> Message (RemoteRef BreakArray) -> IO (RemoteRef BreakArray)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (Int -> Message (RemoteRef BreakArray)
NewBreakArray Int
size)
  Interp -> RemoteRef BreakArray -> IO (ForeignRef BreakArray)
forall a. Interp -> RemoteRef a -> IO (ForeignRef a)
mkFinalizedHValue Interp
interp RemoteRef BreakArray
breakArray

storeBreakpoint :: Interp -> ForeignRef BreakArray -> Int -> Int -> IO ()
storeBreakpoint :: Interp -> ForeignRef BreakArray -> Int -> Int -> IO ()
storeBreakpoint Interp
interp ForeignRef BreakArray
ref Int
ix Int
cnt = do                               -- #19157
  ForeignRef BreakArray -> (RemoteRef BreakArray -> IO ()) -> IO ()
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignRef BreakArray
ref ((RemoteRef BreakArray -> IO ()) -> IO ())
-> (RemoteRef BreakArray -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \RemoteRef BreakArray
breakarray ->
    Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (RemoteRef BreakArray -> Int -> Int -> Message ()
SetupBreakpoint RemoteRef BreakArray
breakarray Int
ix Int
cnt)

breakpointStatus :: Interp -> ForeignRef BreakArray -> Int -> IO Bool
breakpointStatus :: Interp -> ForeignRef BreakArray -> Int -> IO Bool
breakpointStatus Interp
interp ForeignRef BreakArray
ref Int
ix =
  ForeignRef BreakArray
-> (RemoteRef BreakArray -> IO Bool) -> IO Bool
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignRef BreakArray
ref ((RemoteRef BreakArray -> IO Bool) -> IO Bool)
-> (RemoteRef BreakArray -> IO Bool) -> IO Bool
forall a b. (a -> b) -> a -> b
$ \RemoteRef BreakArray
breakarray ->
    Interp -> Message Bool -> IO Bool
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (RemoteRef BreakArray -> Int -> Message Bool
BreakpointStatus RemoteRef BreakArray
breakarray Int
ix)

getBreakpointVar :: Interp -> ForeignHValue -> Int -> IO (Maybe ForeignHValue)
getBreakpointVar :: Interp -> ForeignHValue -> Int -> IO (Maybe ForeignHValue)
getBreakpointVar Interp
interp ForeignHValue
ref Int
ix =
  ForeignHValue
-> (HValueRef -> IO (Maybe ForeignHValue))
-> IO (Maybe ForeignHValue)
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
ref ((HValueRef -> IO (Maybe ForeignHValue))
 -> IO (Maybe ForeignHValue))
-> (HValueRef -> IO (Maybe ForeignHValue))
-> IO (Maybe ForeignHValue)
forall a b. (a -> b) -> a -> b
$ \HValueRef
apStack -> do
    Maybe HValueRef
mb <- Interp -> Message (Maybe HValueRef) -> IO (Maybe HValueRef)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (HValueRef -> Int -> Message (Maybe HValueRef)
GetBreakpointVar HValueRef
apStack Int
ix)
    (HValueRef -> IO ForeignHValue)
-> Maybe HValueRef -> IO (Maybe ForeignHValue)
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b.
Monad m =>
(a -> m b) -> Maybe a -> m (Maybe b)
mapM (Interp -> HValueRef -> IO ForeignHValue
forall a. Interp -> RemoteRef a -> IO (ForeignRef a)
mkFinalizedHValue Interp
interp) Maybe HValueRef
mb

getClosure :: Interp -> ForeignHValue -> IO (Heap.GenClosure ForeignHValue)
getClosure :: Interp -> ForeignHValue -> IO (GenClosure ForeignHValue)
getClosure Interp
interp ForeignHValue
ref =
  ForeignHValue
-> (HValueRef -> IO (GenClosure ForeignHValue))
-> IO (GenClosure ForeignHValue)
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
ref ((HValueRef -> IO (GenClosure ForeignHValue))
 -> IO (GenClosure ForeignHValue))
-> (HValueRef -> IO (GenClosure ForeignHValue))
-> IO (GenClosure ForeignHValue)
forall a b. (a -> b) -> a -> b
$ \HValueRef
hval -> do
    GenClosure HValueRef
mb <- Interp
-> Message (GenClosure HValueRef) -> IO (GenClosure HValueRef)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (HValueRef -> Message (GenClosure HValueRef)
GetClosure HValueRef
hval)
    (HValueRef -> IO ForeignHValue)
-> GenClosure HValueRef -> IO (GenClosure ForeignHValue)
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b.
Monad m =>
(a -> m b) -> GenClosure a -> m (GenClosure b)
mapM (Interp -> HValueRef -> IO ForeignHValue
forall a. Interp -> RemoteRef a -> IO (ForeignRef a)
mkFinalizedHValue Interp
interp) GenClosure HValueRef
mb

-- | Send a Seq message to the iserv process to force a value      #2950
seqHValue :: Interp -> UnitEnv -> ForeignHValue -> IO (EvalResult ())
seqHValue :: Interp -> UnitEnv -> ForeignHValue -> IO (EvalResult ())
seqHValue Interp
interp UnitEnv
unit_env ForeignHValue
ref =
  ForeignHValue
-> (HValueRef -> IO (EvalResult ())) -> IO (EvalResult ())
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignHValue
ref ((HValueRef -> IO (EvalResult ())) -> IO (EvalResult ()))
-> (HValueRef -> IO (EvalResult ())) -> IO (EvalResult ())
forall a b. (a -> b) -> a -> b
$ \HValueRef
hval -> do
    EvalStatus_ () ()
status <- Interp -> Message (EvalStatus_ () ()) -> IO (EvalStatus_ () ())
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (HValueRef -> Message (EvalStatus_ () ())
Seq HValueRef
hval)
    Interp -> UnitEnv -> EvalStatus_ () () -> IO (EvalResult ())
handleSeqHValueStatus Interp
interp UnitEnv
unit_env EvalStatus_ () ()
status

-- | Process the result of a Seq or ResumeSeq message.             #2950
handleSeqHValueStatus :: Interp -> UnitEnv -> EvalStatus () -> IO (EvalResult ())
handleSeqHValueStatus :: Interp -> UnitEnv -> EvalStatus_ () () -> IO (EvalResult ())
handleSeqHValueStatus Interp
interp UnitEnv
unit_env EvalStatus_ () ()
eval_status =
  case EvalStatus_ () ()
eval_status of
    (EvalBreak Bool
is_exception HValueRef
_ Int
ix Int
mod_uniq RemoteRef (ResumeContext ())
resume_ctxt RemotePtr CostCentreStack
_) -> do
      -- A breakpoint was hit; inform the user and tell them
      -- which breakpoint was hit.
      ForeignRef (ResumeContext ())
resume_ctxt_fhv <- IO (ForeignRef (ResumeContext ()))
-> IO (ForeignRef (ResumeContext ()))
forall a. IO a -> IO a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (ForeignRef (ResumeContext ()))
 -> IO (ForeignRef (ResumeContext ())))
-> IO (ForeignRef (ResumeContext ()))
-> IO (ForeignRef (ResumeContext ()))
forall a b. (a -> b) -> a -> b
$ Interp
-> RemoteRef (ResumeContext ())
-> IO (ForeignRef (ResumeContext ()))
forall a. Interp -> RemoteRef a -> IO (ForeignRef a)
mkFinalizedHValue Interp
interp RemoteRef (ResumeContext ())
resume_ctxt
      let hmi :: HomeModInfo
hmi = String -> Maybe HomeModInfo -> HomeModInfo
forall a. HasCallStack => String -> Maybe a -> a
expectJust String
"handleRunStatus" (Maybe HomeModInfo -> HomeModInfo)
-> Maybe HomeModInfo -> HomeModInfo
forall a b. (a -> b) -> a -> b
$
                  HomePackageTable -> Unique -> Maybe HomeModInfo
lookupHptDirectly ((() :: Constraint) => UnitEnv -> HomePackageTable
UnitEnv -> HomePackageTable
ue_hpt UnitEnv
unit_env)
                    (Int -> Unique
mkUniqueGrimily Int
mod_uniq)
          modl :: Module
modl = ModIface_ 'ModIfaceFinal -> Module
forall (phase :: ModIfacePhase). ModIface_ phase -> Module
mi_module (HomeModInfo -> ModIface_ 'ModIfaceFinal
hm_iface HomeModInfo
hmi)
          bp :: Maybe BreakInfo
bp | Bool
is_exception = Maybe BreakInfo
forall a. Maybe a
Nothing
             | Bool
otherwise = BreakInfo -> Maybe BreakInfo
forall a. a -> Maybe a
Just (Module -> Int -> BreakInfo
BreakInfo Module
modl Int
ix)
          sdocBpLoc :: Maybe BreakInfo -> SDoc
sdocBpLoc = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
brackets (SDoc -> SDoc)
-> (Maybe BreakInfo -> SDoc) -> Maybe BreakInfo -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SrcSpan -> SDoc
forall a. Outputable a => a -> SDoc
ppr (SrcSpan -> SDoc)
-> (Maybe BreakInfo -> SrcSpan) -> Maybe BreakInfo -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Maybe BreakInfo -> SrcSpan
getSeqBpSpan
      String -> IO ()
putStrLn (String
"*** Ignoring breakpoint " String -> String -> String
forall a. [a] -> [a] -> [a]
++
            (SDoc -> String
showSDocUnsafe (SDoc -> String) -> SDoc -> String
forall a b. (a -> b) -> a -> b
$ Maybe BreakInfo -> SDoc
sdocBpLoc Maybe BreakInfo
bp))
      -- resume the seq (:force) processing in the iserv process
      ForeignRef (ResumeContext ())
-> (RemoteRef (ResumeContext ()) -> IO (EvalResult ()))
-> IO (EvalResult ())
forall a b. ForeignRef a -> (RemoteRef a -> IO b) -> IO b
withForeignRef ForeignRef (ResumeContext ())
resume_ctxt_fhv ((RemoteRef (ResumeContext ()) -> IO (EvalResult ()))
 -> IO (EvalResult ()))
-> (RemoteRef (ResumeContext ()) -> IO (EvalResult ()))
-> IO (EvalResult ())
forall a b. (a -> b) -> a -> b
$ \RemoteRef (ResumeContext ())
hval -> do
        EvalStatus_ () ()
status <- Interp -> Message (EvalStatus_ () ()) -> IO (EvalStatus_ () ())
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (RemoteRef (ResumeContext ()) -> Message (EvalStatus_ () ())
ResumeSeq RemoteRef (ResumeContext ())
hval)
        Interp -> UnitEnv -> EvalStatus_ () () -> IO (EvalResult ())
handleSeqHValueStatus Interp
interp UnitEnv
unit_env EvalStatus_ () ()
status
    (EvalComplete Word64
_ EvalResult ()
r) -> EvalResult () -> IO (EvalResult ())
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return EvalResult ()
r
  where
    getSeqBpSpan :: Maybe BreakInfo -> SrcSpan
    -- Just case: Stopped at a breakpoint, extract SrcSpan information
    -- from the breakpoint.
    getSeqBpSpan :: Maybe BreakInfo -> SrcSpan
getSeqBpSpan (Just BreakInfo{Int
Module
breakInfo_module :: Module
breakInfo_number :: Int
breakInfo_module :: BreakInfo -> Module
breakInfo_number :: BreakInfo -> Int
..}) =
      (ModBreaks -> Array Int SrcSpan
modBreaks_locs (Module -> ModBreaks
breaks Module
breakInfo_module)) Array Int SrcSpan -> Int -> SrcSpan
forall i e. Ix i => Array i e -> i -> e
! Int
breakInfo_number
    -- Nothing case - should not occur!
    -- Reason: Setting of flags in libraries/ghci/GHCi/Run.hs:evalOptsSeq
    getSeqBpSpan Maybe BreakInfo
Nothing = FastString -> SrcSpan
mkGeneralSrcSpan (String -> FastString
fsLit String
"<unknown>")
    breaks :: Module -> ModBreaks
breaks Module
mod = HomeModInfo -> ModBreaks
getModBreaks (HomeModInfo -> ModBreaks) -> HomeModInfo -> ModBreaks
forall a b. (a -> b) -> a -> b
$ String -> Maybe HomeModInfo -> HomeModInfo
forall a. HasCallStack => String -> Maybe a -> a
expectJust String
"getSeqBpSpan" (Maybe HomeModInfo -> HomeModInfo)
-> Maybe HomeModInfo -> HomeModInfo
forall a b. (a -> b) -> a -> b
$
      HomePackageTable -> ModuleName -> Maybe HomeModInfo
lookupHpt ((() :: Constraint) => UnitEnv -> HomePackageTable
UnitEnv -> HomePackageTable
ue_hpt UnitEnv
unit_env) (Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
mod)


-- -----------------------------------------------------------------------------
-- Interface to the object-code linker

initObjLinker :: Interp -> IO ()
initObjLinker :: Interp -> IO ()
initObjLinker Interp
interp = Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp Message ()
InitLinker

lookupSymbol :: Interp -> FastString -> IO (Maybe (Ptr ()))
lookupSymbol :: Interp -> FastString -> IO (Maybe (Ptr ()))
lookupSymbol Interp
interp FastString
str = case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
  InterpInstance
InternalInterp -> (RemotePtr () -> Ptr ()) -> Maybe (RemotePtr ()) -> Maybe (Ptr ())
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap RemotePtr () -> Ptr ()
forall a. RemotePtr a -> Ptr a
fromRemotePtr (Maybe (RemotePtr ()) -> Maybe (Ptr ()))
-> IO (Maybe (RemotePtr ())) -> IO (Maybe (Ptr ()))
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Message (Maybe (RemotePtr ())) -> IO (Maybe (RemotePtr ()))
forall a. Message a -> IO a
run (String -> Message (Maybe (RemotePtr ()))
LookupSymbol (FastString -> String
unpackFS FastString
str))
#endif

  ExternalInterp IServConfig
c IServ
i -> IServConfig
-> IServ
-> (IServInstance -> IO (IServInstance, Maybe (Ptr ())))
-> IO (Maybe (Ptr ()))
forall (m :: * -> *) a.
ExceptionMonad m =>
IServConfig
-> IServ -> (IServInstance -> m (IServInstance, a)) -> m a
withIServ IServConfig
c IServ
i ((IServInstance -> IO (IServInstance, Maybe (Ptr ())))
 -> IO (Maybe (Ptr ())))
-> (IServInstance -> IO (IServInstance, Maybe (Ptr ())))
-> IO (Maybe (Ptr ()))
forall a b. (a -> b) -> a -> b
$ \IServInstance
iserv -> do
    -- Profiling of GHCi showed a lot of time and allocation spent
    -- making cross-process LookupSymbol calls, so I added a GHC-side
    -- cache which sped things up quite a lot.  We have to be careful
    -- to purge this cache when unloading code though.
    let cache :: UniqFM FastString (Ptr ())
cache = IServInstance -> UniqFM FastString (Ptr ())
iservLookupSymbolCache IServInstance
iserv
    case UniqFM FastString (Ptr ()) -> FastString -> Maybe (Ptr ())
forall key elt. Uniquable key => UniqFM key elt -> key -> Maybe elt
lookupUFM UniqFM FastString (Ptr ())
cache FastString
str of
      Just Ptr ()
p -> (IServInstance, Maybe (Ptr ()))
-> IO (IServInstance, Maybe (Ptr ()))
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (IServInstance
iserv, Ptr () -> Maybe (Ptr ())
forall a. a -> Maybe a
Just Ptr ()
p)
      Maybe (Ptr ())
Nothing -> do
        Maybe (RemotePtr ())
m <- IO (Maybe (RemotePtr ())) -> IO (Maybe (RemotePtr ()))
forall a. IO a -> IO a
uninterruptibleMask_ (IO (Maybe (RemotePtr ())) -> IO (Maybe (RemotePtr ())))
-> IO (Maybe (RemotePtr ())) -> IO (Maybe (RemotePtr ()))
forall a b. (a -> b) -> a -> b
$
                 IServInstance
-> Message (Maybe (RemotePtr ())) -> IO (Maybe (RemotePtr ()))
forall a. Binary a => IServInstance -> Message a -> IO a
iservCall IServInstance
iserv (String -> Message (Maybe (RemotePtr ()))
LookupSymbol (FastString -> String
unpackFS FastString
str))
        case Maybe (RemotePtr ())
m of
          Maybe (RemotePtr ())
Nothing -> (IServInstance, Maybe (Ptr ()))
-> IO (IServInstance, Maybe (Ptr ()))
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (IServInstance
iserv, Maybe (Ptr ())
forall a. Maybe a
Nothing)
          Just RemotePtr ()
r -> do
            let p :: Ptr ()
p      = RemotePtr () -> Ptr ()
forall a. RemotePtr a -> Ptr a
fromRemotePtr RemotePtr ()
r
                cache' :: UniqFM FastString (Ptr ())
cache' = UniqFM FastString (Ptr ())
-> FastString -> Ptr () -> UniqFM FastString (Ptr ())
forall key elt.
Uniquable key =>
UniqFM key elt -> key -> elt -> UniqFM key elt
addToUFM UniqFM FastString (Ptr ())
cache FastString
str Ptr ()
p
                iserv' :: IServInstance
iserv' = IServInstance
iserv {iservLookupSymbolCache = cache'}
            (IServInstance, Maybe (Ptr ()))
-> IO (IServInstance, Maybe (Ptr ()))
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (IServInstance
iserv', Ptr () -> Maybe (Ptr ())
forall a. a -> Maybe a
Just Ptr ()
p)

lookupClosure :: Interp -> String -> IO (Maybe HValueRef)
lookupClosure :: Interp -> String -> IO (Maybe HValueRef)
lookupClosure Interp
interp String
str =
  Interp -> Message (Maybe HValueRef) -> IO (Maybe HValueRef)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> Message (Maybe HValueRef)
LookupClosure String
str)

purgeLookupSymbolCache :: Interp -> IO ()
purgeLookupSymbolCache :: Interp -> IO ()
purgeLookupSymbolCache Interp
interp = case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
  InterpInstance
InternalInterp -> () -> IO ()
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ()
#endif
  ExternalInterp IServConfig
_ (IServ MVar IServState
mstate) ->
    MVar IServState -> (IServState -> IO IServState) -> IO ()
forall a. MVar a -> (a -> IO a) -> IO ()
modifyMVar_ MVar IServState
mstate ((IServState -> IO IServState) -> IO ())
-> (IServState -> IO IServState) -> IO ()
forall a b. (a -> b) -> a -> b
$ \IServState
state -> IServState -> IO IServState
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (IServState -> IO IServState) -> IServState -> IO IServState
forall a b. (a -> b) -> a -> b
$ case IServState
state of
      IServState
IServPending       -> IServState
state
      IServRunning IServInstance
iserv -> IServInstance -> IServState
IServRunning
        (IServInstance
iserv { iservLookupSymbolCache = emptyUFM })


-- | 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.
--
-- Returns:
--
-- Nothing      => success
-- Just err_msg => failure
loadDLL :: Interp -> String -> IO (Maybe String)
loadDLL :: Interp -> String -> IO (Maybe String)
loadDLL Interp
interp String
str = Interp -> Message (Maybe String) -> IO (Maybe String)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> Message (Maybe String)
LoadDLL String
str)

loadArchive :: Interp -> String -> IO ()
loadArchive :: Interp -> String -> IO ()
loadArchive Interp
interp String
path = do
  String
path' <- String -> IO String
canonicalizePath String
path -- Note [loadObj and relative paths]
  Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> Message ()
LoadArchive String
path')

loadObj :: Interp -> String -> IO ()
loadObj :: Interp -> String -> IO ()
loadObj Interp
interp String
path = do
  String
path' <- String -> IO String
canonicalizePath String
path -- Note [loadObj and relative paths]
  Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> Message ()
LoadObj String
path')

unloadObj :: Interp -> String -> IO ()
unloadObj :: Interp -> String -> IO ()
unloadObj Interp
interp String
path = do
  String
path' <- String -> IO String
canonicalizePath String
path -- Note [loadObj and relative paths]
  Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> Message ()
UnloadObj String
path')

-- Note [loadObj and relative paths]
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- the iserv process might have a different current directory from the
-- GHC process, so we must make paths absolute before sending them
-- over.

addLibrarySearchPath :: Interp -> String -> IO (Ptr ())
addLibrarySearchPath :: Interp -> String -> IO (Ptr ())
addLibrarySearchPath Interp
interp String
str =
  RemotePtr () -> Ptr ()
forall a. RemotePtr a -> Ptr a
fromRemotePtr (RemotePtr () -> Ptr ()) -> IO (RemotePtr ()) -> IO (Ptr ())
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Interp -> Message (RemotePtr ()) -> IO (RemotePtr ())
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> Message (RemotePtr ())
AddLibrarySearchPath String
str)

removeLibrarySearchPath :: Interp -> Ptr () -> IO Bool
removeLibrarySearchPath :: Interp -> Ptr () -> IO Bool
removeLibrarySearchPath Interp
interp Ptr ()
p =
  Interp -> Message Bool -> IO Bool
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (RemotePtr () -> Message Bool
RemoveLibrarySearchPath (Ptr () -> RemotePtr ()
forall a. Ptr a -> RemotePtr a
toRemotePtr Ptr ()
p))

resolveObjs :: Interp -> IO SuccessFlag
resolveObjs :: Interp -> IO SuccessFlag
resolveObjs Interp
interp = Bool -> SuccessFlag
successIf (Bool -> SuccessFlag) -> IO Bool -> IO SuccessFlag
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Interp -> Message Bool -> IO Bool
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp Message Bool
ResolveObjs

findSystemLibrary :: Interp -> String -> IO (Maybe String)
findSystemLibrary :: Interp -> String -> IO (Maybe String)
findSystemLibrary Interp
interp String
str = Interp -> Message (Maybe String) -> IO (Maybe String)
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp (String -> Message (Maybe String)
FindSystemLibrary String
str)


-- -----------------------------------------------------------------------------
-- Raw calls and messages

-- | Send a 'Message' and receive the response from the iserv process
iservCall :: Binary a => IServInstance -> Message a -> IO a
iservCall :: forall a. Binary a => IServInstance -> Message a -> IO a
iservCall IServInstance
iserv Message a
msg =
  Pipe -> Message a -> IO a
forall a. Binary a => Pipe -> Message a -> IO a
remoteCall (IServInstance -> Pipe
iservPipe IServInstance
iserv) Message a
msg
    IO a -> (SomeException -> IO a) -> IO a
forall e a. Exception e => IO a -> (e -> IO a) -> IO a
`catchException` \(SomeException
e :: SomeException) -> IServInstance -> SomeException -> IO a
forall a. IServInstance -> SomeException -> IO a
handleIServFailure IServInstance
iserv SomeException
e

-- | Read a value from the iserv process
readIServ :: IServInstance -> Get a -> IO a
readIServ :: forall a. IServInstance -> Get a -> IO a
readIServ IServInstance
iserv Get a
get =
  Pipe -> Get a -> IO a
forall a. Pipe -> Get a -> IO a
readPipe (IServInstance -> Pipe
iservPipe IServInstance
iserv) Get a
get
    IO a -> (SomeException -> IO a) -> IO a
forall e a. Exception e => IO a -> (e -> IO a) -> IO a
`catchException` \(SomeException
e :: SomeException) -> IServInstance -> SomeException -> IO a
forall a. IServInstance -> SomeException -> IO a
handleIServFailure IServInstance
iserv SomeException
e

-- | Send a value to the iserv process
writeIServ :: IServInstance -> Put -> IO ()
writeIServ :: IServInstance -> Put -> IO ()
writeIServ IServInstance
iserv Put
put =
  Pipe -> Put -> IO ()
writePipe (IServInstance -> Pipe
iservPipe IServInstance
iserv) Put
put
    IO () -> (SomeException -> IO ()) -> IO ()
forall e a. Exception e => IO a -> (e -> IO a) -> IO a
`catchException` \(SomeException
e :: SomeException) -> IServInstance -> SomeException -> IO ()
forall a. IServInstance -> SomeException -> IO a
handleIServFailure IServInstance
iserv SomeException
e

handleIServFailure :: IServInstance -> SomeException -> IO a
handleIServFailure :: forall a. IServInstance -> SomeException -> IO a
handleIServFailure IServInstance
iserv SomeException
e = do
  let proc :: ProcessHandle
proc = IServInstance -> ProcessHandle
iservProcess IServInstance
iserv
  Maybe ExitCode
ex <- ProcessHandle -> IO (Maybe ExitCode)
getProcessExitCode ProcessHandle
proc
  case Maybe ExitCode
ex of
    Just (ExitFailure Int
n) ->
      GhcException -> IO a
forall e a. Exception e => e -> IO a
throwIO (String -> GhcException
InstallationError (String
"ghc-iserv terminated (" String -> String -> String
forall a. [a] -> [a] -> [a]
++ Int -> String
forall a. Show a => a -> String
show Int
n String -> String -> String
forall a. [a] -> [a] -> [a]
++ String
")"))
    Maybe ExitCode
_ -> do
      ProcessHandle -> IO ()
terminateProcess ProcessHandle
proc
      ExitCode
_ <- ProcessHandle -> IO ExitCode
waitForProcess ProcessHandle
proc
      SomeException -> IO a
forall a e. Exception e => e -> a
throw SomeException
e

-- | Spawn an external interpreter
spawnIServ :: IServConfig -> IO IServInstance
spawnIServ :: IServConfig -> IO IServInstance
spawnIServ IServConfig
conf = do
  IServConfig -> IO ()
iservConfTrace IServConfig
conf
  let createProc :: CreateProcess -> IO ProcessHandle
createProc = (CreateProcess -> IO ProcessHandle)
-> Maybe (CreateProcess -> IO ProcessHandle)
-> CreateProcess
-> IO ProcessHandle
forall a. a -> Maybe a -> a
fromMaybe (\CreateProcess
cp -> do { (Maybe Handle
_,Maybe Handle
_,Maybe Handle
_,ProcessHandle
ph) <- CreateProcess
-> IO (Maybe Handle, Maybe Handle, Maybe Handle, ProcessHandle)
createProcess CreateProcess
cp
                                        ; ProcessHandle -> IO ProcessHandle
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ProcessHandle
ph })
                             (IServConfig -> Maybe (CreateProcess -> IO ProcessHandle)
iservConfHook IServConfig
conf)
  (ProcessHandle
ph, Handle
rh, Handle
wh) <- (CreateProcess -> IO ProcessHandle)
-> String -> [String] -> IO (ProcessHandle, Handle, Handle)
runWithPipes CreateProcess -> IO ProcessHandle
createProc (IServConfig -> String
iservConfProgram IServConfig
conf)
                                          (IServConfig -> [String]
iservConfOpts    IServConfig
conf)
  IORef (Maybe ByteString)
lo_ref <- Maybe ByteString -> IO (IORef (Maybe ByteString))
forall a. a -> IO (IORef a)
newIORef Maybe ByteString
forall a. Maybe a
Nothing
  IServInstance -> IO IServInstance
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (IServInstance -> IO IServInstance)
-> IServInstance -> IO IServInstance
forall a b. (a -> b) -> a -> b
$ IServInstance
    { iservPipe :: Pipe
iservPipe              = Pipe { pipeRead :: Handle
pipeRead = Handle
rh, pipeWrite :: Handle
pipeWrite = Handle
wh, pipeLeftovers :: IORef (Maybe ByteString)
pipeLeftovers = IORef (Maybe ByteString)
lo_ref }
    , iservProcess :: ProcessHandle
iservProcess           = ProcessHandle
ph
    , iservLookupSymbolCache :: UniqFM FastString (Ptr ())
iservLookupSymbolCache = UniqFM FastString (Ptr ())
forall key elt. UniqFM key elt
emptyUFM
    , iservPendingFrees :: [HValueRef]
iservPendingFrees      = []
    }

-- | Stop the interpreter
stopInterp :: Interp -> IO ()
stopInterp :: Interp -> IO ()
stopInterp Interp
interp = case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
    InterpInstance
InternalInterp -> () -> IO ()
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ()
#endif
    ExternalInterp IServConfig
_ (IServ MVar IServState
mstate) ->
      ((forall a. IO a -> IO a) -> IO ()) -> IO ()
forall b. ((forall a. IO a -> IO a) -> IO b) -> IO b
forall (m :: * -> *) b.
MonadMask m =>
((forall a. m a -> m a) -> m b) -> m b
MC.mask (((forall a. IO a -> IO a) -> IO ()) -> IO ())
-> ((forall a. IO a -> IO a) -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \forall a. IO a -> IO a
_restore -> MVar IServState -> (IServState -> IO IServState) -> IO ()
forall a. MVar a -> (a -> IO a) -> IO ()
modifyMVar_ MVar IServState
mstate ((IServState -> IO IServState) -> IO ())
-> (IServState -> IO IServState) -> IO ()
forall a b. (a -> b) -> a -> b
$ \IServState
state -> do
        case IServState
state of
          IServState
IServPending    -> IServState -> IO IServState
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure IServState
state -- already stopped
          IServRunning IServInstance
i  -> do
            Maybe ExitCode
ex <- ProcessHandle -> IO (Maybe ExitCode)
getProcessExitCode (IServInstance -> ProcessHandle
iservProcess IServInstance
i)
            if Maybe ExitCode -> Bool
forall a. Maybe a -> Bool
isJust Maybe ExitCode
ex
               then () -> IO ()
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ()
               else IServInstance -> Message () -> IO ()
forall a. Binary a => IServInstance -> Message a -> IO a
iservCall IServInstance
i Message ()
Shutdown
            IServState -> IO IServState
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure IServState
IServPending

runWithPipes :: (CreateProcess -> IO ProcessHandle)
             -> FilePath -> [String] -> IO (ProcessHandle, Handle, Handle)
#if defined(mingw32_HOST_OS)
foreign import ccall "io.h _close"
   c__close :: CInt -> IO CInt

foreign import ccall unsafe "io.h _get_osfhandle"
   _get_osfhandle :: CInt -> IO CInt

runWithPipesPOSIX :: (CreateProcess -> IO ProcessHandle)
                  -> FilePath -> [String] -> IO (ProcessHandle, Handle, Handle)
runWithPipesPOSIX createProc prog opts = do
    (rfd1, wfd1) <- createPipeFd -- we read on rfd1
    (rfd2, wfd2) <- createPipeFd -- we write on wfd2
    wh_client    <- _get_osfhandle wfd1
    rh_client    <- _get_osfhandle rfd2
    let args = show wh_client : show rh_client : opts
    ph <- createProc (proc prog args)
    rh <- mkHandle rfd1
    wh <- mkHandle wfd2
    return (ph, rh, wh)
      where mkHandle :: CInt -> IO Handle
            mkHandle fd = (fdToHandle fd) `Ex.onException` (c__close fd)

# if defined (__IO_MANAGER_WINIO__)
runWithPipesNative :: (CreateProcess -> IO ProcessHandle)
                   -> FilePath -> [String] -> IO (ProcessHandle, Handle, Handle)
runWithPipesNative createProc prog opts = do
    (rh, wfd1) <- createPipe -- we read on rfd1
    (rfd2, wh) <- createPipe -- we write on wfd2
    wh_client    <- handleToHANDLE wfd1
    rh_client    <- handleToHANDLE rfd2
    -- Associate the handle with the current manager
    -- but don't touch the ones we're passing to the child
    -- since it needs to register the handle with its own manager.
    associateHandle' =<< handleToHANDLE rh
    associateHandle' =<< handleToHANDLE wh
    let args = show wh_client : show rh_client : opts
    ph <- createProc (proc prog args)
    return (ph, rh, wh)

runWithPipes = runWithPipesPOSIX <!> runWithPipesNative
# else
runWithPipes = runWithPipesPOSIX
# endif
#else
runWithPipes :: (CreateProcess -> IO ProcessHandle)
-> String -> [String] -> IO (ProcessHandle, Handle, Handle)
runWithPipes CreateProcess -> IO ProcessHandle
createProc String
prog [String]
opts = do
    (Fd
rfd1, Fd
wfd1) <- IO (Fd, Fd)
Posix.createPipe -- we read on rfd1
    (Fd
rfd2, Fd
wfd2) <- IO (Fd, Fd)
Posix.createPipe -- we write on wfd2
    Fd -> FdOption -> Bool -> IO ()
setFdOption Fd
rfd1 FdOption
CloseOnExec Bool
True
    Fd -> FdOption -> Bool -> IO ()
setFdOption Fd
wfd2 FdOption
CloseOnExec Bool
True
    let args :: [String]
args = Fd -> String
forall a. Show a => a -> String
show Fd
wfd1 String -> [String] -> [String]
forall a. a -> [a] -> [a]
: Fd -> String
forall a. Show a => a -> String
show Fd
rfd2 String -> [String] -> [String]
forall a. a -> [a] -> [a]
: [String]
opts
    ProcessHandle
ph <- CreateProcess -> IO ProcessHandle
createProc (String -> [String] -> CreateProcess
proc String
prog [String]
args)
    Fd -> IO ()
closeFd Fd
wfd1
    Fd -> IO ()
closeFd Fd
rfd2
    Handle
rh <- Fd -> IO Handle
fdToHandle Fd
rfd1
    Handle
wh <- Fd -> IO Handle
fdToHandle Fd
wfd2
    (ProcessHandle, Handle, Handle)
-> IO (ProcessHandle, Handle, Handle)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (ProcessHandle
ph, Handle
rh, Handle
wh)
#endif

-- -----------------------------------------------------------------------------
{- Note [External GHCi pointers]
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We have the following ways to reference things in GHCi:

HValue
------

HValue is a direct reference to a value in the local heap.  Obviously
we cannot use this to refer to things in the external process.


RemoteRef
---------

RemoteRef is a StablePtr to a heap-resident value.  When
-fexternal-interpreter is used, this value resides in the external
process's heap.  RemoteRefs are mostly used to send pointers in
messages between GHC and iserv.

A RemoteRef must be explicitly freed when no longer required, using
freeHValueRefs, or by attaching a finalizer with mkForeignHValue.

To get from a RemoteRef to an HValue you can use 'wormholeRef', which
fails with an error message if -fexternal-interpreter is in use.

ForeignRef
----------

A ForeignRef is a RemoteRef with a finalizer that will free the
'RemoteRef' when it is garbage collected.  We mostly use ForeignHValue
on the GHC side.

The finalizer adds the RemoteRef to the iservPendingFrees list in the
IServ record.  The next call to interpCmd will free any RemoteRefs in
the list.  It was done this way rather than calling interpCmd directly,
because I didn't want to have arbitrary threads calling interpCmd.  In
principle it would probably be ok, but it seems less hairy this way.
-}

-- | Creates a 'ForeignRef' that will automatically release the
-- 'RemoteRef' when it is no longer referenced.
mkFinalizedHValue :: Interp -> RemoteRef a -> IO (ForeignRef a)
mkFinalizedHValue :: forall a. Interp -> RemoteRef a -> IO (ForeignRef a)
mkFinalizedHValue Interp
interp RemoteRef a
rref = do
   let hvref :: HValueRef
hvref = RemoteRef a -> HValueRef
forall a. RemoteRef a -> HValueRef
toHValueRef RemoteRef a
rref

   IO ()
free <- case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
      InterpInstance
InternalInterp             -> IO () -> IO (IO ())
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (HValueRef -> IO ()
forall a. RemoteRef a -> IO ()
freeRemoteRef HValueRef
hvref)
#endif
      ExternalInterp IServConfig
_ (IServ MVar IServState
i) -> IO () -> IO (IO ())
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (IO () -> IO (IO ())) -> IO () -> IO (IO ())
forall a b. (a -> b) -> a -> b
$ MVar IServState -> (IServState -> IO IServState) -> IO ()
forall a. MVar a -> (a -> IO a) -> IO ()
modifyMVar_ MVar IServState
i ((IServState -> IO IServState) -> IO ())
-> (IServState -> IO IServState) -> IO ()
forall a b. (a -> b) -> a -> b
$ \IServState
state ->
       case IServState
state of
         IServPending {}   -> IServState -> IO IServState
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure IServState
state -- already shut down
         IServRunning IServInstance
inst -> do
            let !inst' :: IServInstance
inst' = IServInstance
inst {iservPendingFrees = hvref:iservPendingFrees inst}
            IServState -> IO IServState
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (IServInstance -> IServState
IServRunning IServInstance
inst')

   RemoteRef a -> IO () -> IO (ForeignRef a)
forall a. RemoteRef a -> IO () -> IO (ForeignRef a)
mkForeignRef RemoteRef a
rref IO ()
free


freeHValueRefs :: Interp -> [HValueRef] -> IO ()
freeHValueRefs :: Interp -> [HValueRef] -> IO ()
freeHValueRefs Interp
_ [] = () -> IO ()
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ()
freeHValueRefs Interp
interp [HValueRef]
refs = Interp -> Message () -> IO ()
forall a. Binary a => Interp -> Message a -> IO a
interpCmd Interp
interp ([HValueRef] -> Message ()
FreeHValueRefs [HValueRef]
refs)

-- | 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.
wormhole :: Interp -> ForeignRef a -> IO a
wormhole :: forall a. Interp -> ForeignRef a -> IO a
wormhole Interp
interp ForeignRef a
r = Interp -> RemoteRef a -> IO a
forall a. Interp -> RemoteRef a -> IO a
wormholeRef Interp
interp (ForeignRef a -> RemoteRef a
forall a. ForeignRef a -> RemoteRef a
unsafeForeignRefToRemoteRef ForeignRef a
r)

-- | 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.
wormholeRef :: Interp -> RemoteRef a -> IO a
wormholeRef :: forall a. Interp -> RemoteRef a -> IO a
wormholeRef Interp
interp RemoteRef a
_r = case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
  InterpInstance
InternalInterp -> RemoteRef a -> IO a
forall a. RemoteRef a -> IO a
localRef RemoteRef a
_r
#endif
  ExternalInterp {}
    -> GhcException -> IO a
forall e a. Exception e => e -> IO a
throwIO (String -> GhcException
InstallationError String
"this operation requires -fno-external-interpreter")

-- -----------------------------------------------------------------------------
-- Misc utils

fromEvalResult :: EvalResult a -> IO a
fromEvalResult :: forall a. EvalResult a -> IO a
fromEvalResult (EvalException SerializableException
e) = SomeException -> IO a
forall e a. Exception e => e -> IO a
throwIO (SerializableException -> SomeException
fromSerializableException SerializableException
e)
fromEvalResult (EvalSuccess a
a) = a -> IO a
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return a
a

getModBreaks :: HomeModInfo -> ModBreaks
getModBreaks :: HomeModInfo -> ModBreaks
getModBreaks HomeModInfo
hmi
  | Just Linkable
linkable <- HomeModInfo -> Maybe Linkable
homeModInfoByteCode HomeModInfo
hmi,
    [CompiledByteCode
cbc] <- (Unlinked -> Maybe CompiledByteCode)
-> [Unlinked] -> [CompiledByteCode]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe Unlinked -> Maybe CompiledByteCode
onlyBCOs ([Unlinked] -> [CompiledByteCode])
-> [Unlinked] -> [CompiledByteCode]
forall a b. (a -> b) -> a -> b
$ Linkable -> [Unlinked]
linkableUnlinked Linkable
linkable
  = ModBreaks -> Maybe ModBreaks -> ModBreaks
forall a. a -> Maybe a -> a
fromMaybe ModBreaks
emptyModBreaks (CompiledByteCode -> Maybe ModBreaks
bc_breaks CompiledByteCode
cbc)
  | Bool
otherwise
  = ModBreaks
emptyModBreaks -- probably object code
  where
    -- The linkable may have 'DotO's as well; only consider BCOs. See #20570.
    onlyBCOs :: Unlinked -> Maybe CompiledByteCode
    onlyBCOs :: Unlinked -> Maybe CompiledByteCode
onlyBCOs (BCOs CompiledByteCode
cbc [SptEntry]
_) = CompiledByteCode -> Maybe CompiledByteCode
forall a. a -> Maybe a
Just CompiledByteCode
cbc
    onlyBCOs Unlinked
_            = Maybe CompiledByteCode
forall a. Maybe a
Nothing

-- | Interpreter uses Profiling way
interpreterProfiled :: Interp -> Bool
interpreterProfiled :: Interp -> Bool
interpreterProfiled Interp
interp = case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
  InterpInstance
InternalInterp     -> Bool
hostIsProfiled
#endif
  ExternalInterp IServConfig
c IServ
_ -> IServConfig -> Bool
iservConfProfiled IServConfig
c

-- | Interpreter uses Dynamic way
interpreterDynamic :: Interp -> Bool
interpreterDynamic :: Interp -> Bool
interpreterDynamic Interp
interp = case Interp -> InterpInstance
interpInstance Interp
interp of
#if defined(HAVE_INTERNAL_INTERPRETER)
  InterpInstance
InternalInterp     -> Bool
hostIsDynamic
#endif
  ExternalInterp IServConfig
c IServ
_ -> IServConfig -> Bool
iservConfDynamic IServConfig
c