#include "HsVersions.h"
import qualified GHC
-import {-#SOURCE#-} Debugger
-import Breakpoints
-import Outputable
-import Panic hiding (showException)
+import Outputable hiding (printForUser)
+import qualified Outputable
+import Panic hiding (showException)
import Util
+import DynFlags
+import HscTypes
+import SrcLoc
+import Module
import Numeric
+import Control.Concurrent
import Control.Exception as Exception
+import Data.Array
import Data.Char
-import Data.Dynamic
import Data.Int ( Int64 )
import Data.IORef
import Data.List
args :: [String],
prompt :: String,
editor :: String,
+ stop :: String,
session :: GHC.Session,
options :: [GHCiOption],
prelude :: GHC.Module,
- bkptTable :: IORef (BkptTable GHC.Module),
- topLevel :: Bool
+ resume :: [(SrcSpan, ThreadId, GHC.ResumeHandle)],
+ breaks :: !ActiveBreakPoints,
+ tickarrays :: ModuleEnv TickArray
+ -- tickarrays caches the TickArray for loaded modules,
+ -- so that we don't rebuild it each time the user sets
+ -- a breakpoint.
}
+type TickArray = Array Int [(BreakIndex,SrcSpan)]
+
data GHCiOption
= ShowTiming -- show time/allocs after evaluation
| ShowType -- show the type of expressions
| RevertCAFs -- revert CAFs after every evaluation
deriving Eq
+data ActiveBreakPoints
+ = ActiveBreakPoints
+ { breakCounter :: !Int
+ , breakLocations :: ![(Int, BreakLocation)] -- break location uniquely numbered
+ }
+
+instance Outputable ActiveBreakPoints where
+ ppr activeBrks = prettyLocations $ breakLocations activeBrks
+
+emptyActiveBreakPoints :: ActiveBreakPoints
+emptyActiveBreakPoints
+ = ActiveBreakPoints { breakCounter = 0, breakLocations = [] }
+
+data BreakLocation
+ = BreakLocation
+ { breakModule :: !GHC.Module
+ , breakLoc :: !SrcSpan
+ , breakTick :: {-# UNPACK #-} !Int
+ }
+ deriving Eq
+
+prettyLocations :: [(Int, BreakLocation)] -> SDoc
+prettyLocations [] = text "No active breakpoints."
+prettyLocations locs = vcat $ map (\(i, loc) -> brackets (int i) <+> ppr loc) $ reverse $ locs
+
+instance Outputable BreakLocation where
+ ppr loc = (ppr $ breakModule loc) <+> ppr (breakLoc loc)
+
+getActiveBreakPoints :: GHCi ActiveBreakPoints
+getActiveBreakPoints = liftM breaks getGHCiState
+
+-- don't reset the counter back to zero?
+discardActiveBreakPoints :: GHCi ()
+discardActiveBreakPoints = do
+ st <- getGHCiState
+ let oldActiveBreaks = breaks st
+ newActiveBreaks = oldActiveBreaks { breakLocations = [] }
+ setGHCiState $ st { breaks = newActiveBreaks }
+
+deleteBreak :: Int -> GHCi ()
+deleteBreak identity = do
+ st <- getGHCiState
+ let oldActiveBreaks = breaks st
+ oldLocations = breakLocations oldActiveBreaks
+ newLocations = filter (\loc -> fst loc /= identity) oldLocations
+ newActiveBreaks = oldActiveBreaks { breakLocations = newLocations }
+ setGHCiState $ st { breaks = newActiveBreaks }
+
+recordBreak :: BreakLocation -> GHCi (Bool{- was already present -}, Int)
+recordBreak brkLoc = do
+ st <- getGHCiState
+ let oldActiveBreaks = breaks st
+ let oldLocations = breakLocations oldActiveBreaks
+ -- don't store the same break point twice
+ case [ nm | (nm, loc) <- oldLocations, loc == brkLoc ] of
+ (nm:_) -> return (True, nm)
+ [] -> do
+ let oldCounter = breakCounter oldActiveBreaks
+ newCounter = oldCounter + 1
+ newActiveBreaks =
+ oldActiveBreaks
+ { breakCounter = newCounter
+ , breakLocations = (oldCounter, brkLoc) : oldLocations
+ }
+ setGHCiState $ st { breaks = newActiveBreaks }
+ return (False, oldCounter)
+
newtype GHCi a = GHCi { unGHCi :: IORef GHCiState -> IO a }
startGHCi :: GHCi a -> GHCiState -> IO a
io :: IO a -> GHCi a
io m = GHCi { unGHCi = \s -> m >>= return }
-isTopLevel :: GHCi Bool
-isTopLevel = getGHCiState >>= return . topLevel
-
-getBkptTable :: GHCi (BkptTable GHC.Module)
-getBkptTable = do table_ref <- getGHCiState >>= return . bkptTable
- io$ readIORef table_ref
-
-setBkptTable :: BkptTable GHC.Module -> GHCi ()
-setBkptTable new_table = do
- table_ref <- getGHCiState >>= return . bkptTable
- io$ writeIORef table_ref new_table
-
-modifyBkptTable :: (BkptTable GHC.Module -> BkptTable GHC.Module) -> GHCi ()
-modifyBkptTable f = do
- bt <- getBkptTable
- new_bt <- io . evaluate$ f bt
- setBkptTable new_bt
-
-showForUser :: SDoc -> GHCi String
-showForUser doc = do
+popResume :: GHCi (Maybe (SrcSpan, ThreadId, GHC.ResumeHandle))
+popResume = do
+ st <- getGHCiState
+ case (resume st) of
+ [] -> return Nothing
+ (x:xs) -> do setGHCiState $ st { resume = xs } ; return (Just x)
+
+pushResume :: SrcSpan -> ThreadId -> GHC.ResumeHandle -> GHCi ()
+pushResume span threadId resumeAction = do
+ st <- getGHCiState
+ let oldResume = resume st
+ setGHCiState $ st { resume = (span, threadId, resumeAction) : oldResume }
+
+discardResumeContext :: GHCi ()
+discardResumeContext = do
+ st <- getGHCiState
+ setGHCiState st { resume = [] }
+
+printForUser :: SDoc -> GHCi ()
+printForUser doc = do
session <- getSession
unqual <- io (GHC.getPrintUnqual session)
- return $! showSDocForUser unqual doc
-
--- --------------------------------------------------------------------------
--- Inferior Sessions Exceptions (used by the debugger)
-
-data InfSessionException =
- StopChildSession -- A child session requests to be stopped
- | StopParentSession -- A child session requests to be stopped
- -- AND that the parent session quits after that
- | ChildSessionStopped String -- A child session has stopped
- deriving Typeable
-
+ io $ Outputable.printForUser stdout unqual doc
-- --------------------------------------------------------------------------
-- timing & statistics
initInterpBuffering :: GHC.Session -> IO ()
initInterpBuffering session
- = do maybe_hval <- GHC.compileExpr session no_buf_cmd
-
+ = do -- we don't want to be fooled by any modules lying around in the current
+ -- directory when we compile these code fragments, so set the import
+ -- path to be empty while we compile them.
+ dflags <- GHC.getSessionDynFlags session
+ GHC.setSessionDynFlags session dflags{importPaths=[]}
+
+ maybe_hval <- GHC.compileExpr session no_buf_cmd
+
case maybe_hval of
Just hval -> writeIORef turn_off_buffering (unsafeCoerce# hval :: IO ())
other -> panic "interactiveUI:setBuffering"
Just hval -> writeIORef flush_interp (unsafeCoerce# hval :: IO ())
_ -> panic "interactiveUI:flush"
+ GHC.setSessionDynFlags session dflags
+ GHC.workingDirectoryChanged session
return ()
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