X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FGHC.hs;h=3b1d91746b964be95fb332df5622f8d60d0ec47a;hb=4a8ca58413c836cc24f88c1b4753893598e9ff9c;hp=8d54058bd05e5ea87c8fffc48b9df3fbce63142b;hpb=6645c011ab8d125fc9b5f8d19b0282cfd33394fc;p=ghc-hetmet.git diff --git a/compiler/main/GHC.hs b/compiler/main/GHC.hs index 8d54058..3b1d917 100644 --- a/compiler/main/GHC.hs +++ b/compiler/main/GHC.hs @@ -87,6 +87,7 @@ module GHC ( obtainTerm, obtainTerm1, ModBreaks(..), BreakIndex, BreakInfo(breakInfo_number, breakInfo_module), + BreakArray, setBreakOn, setBreakOff, getBreak, modInfoModBreaks, #endif @@ -163,6 +164,14 @@ module GHC ( -- ** Source locations SrcLoc, pprDefnLoc, + mkSrcLoc, isGoodSrcLoc, + srcLocFile, srcLocLine, srcLocCol, + SrcSpan, + mkSrcSpan, srcLocSpan, + srcSpanStart, srcSpanEnd, + srcSpanFile, + srcSpanStartLine, srcSpanEndLine, + srcSpanStartCol, srcSpanEndCol, -- * Exceptions GhcException(..), showGhcException, @@ -198,6 +207,7 @@ import ByteCodeInstr import DebuggerTys import IdInfo import HscMain ( hscParseIdentifier, hscTcExpr, hscKcType, hscStmt ) +import BreakArray #endif import Packages @@ -2130,7 +2140,7 @@ data RunResult | RunBreak ThreadId [Name] BreakInfo ResumeHandle data Status - = Break HValue BreakInfo ThreadId (MVar ()) (MVar Status) [Name] + = Break HValue BreakInfo ThreadId -- ^ the computation hit a breakpoint | Complete (Either Exception [HValue]) -- ^ the computation completed with either an exception or a value @@ -2143,9 +2153,15 @@ data ResumeHandle (MVar ()) -- breakMVar (MVar Status) -- statusMVar [Name] -- [Name] to bind on completion + InteractiveContext -- IC on completion InteractiveContext -- IC to restore on resumption [Name] -- [Name] to remove from the link env +-- We need to track two InteractiveContexts: +-- - the IC before runStmt, which is restored on each resume +-- - the IC binding the results of the original statement, which +-- will be the IC when runStmt returns with RunOk. + -- | Run a statement in the current interactive context. Statement -- may bind multple values. runStmt :: Session -> String -> IO RunResult @@ -2165,38 +2181,40 @@ runStmt (Session ref) expr case maybe_stuff of Nothing -> return RunFailed - Just (new_hsc_env, names, hval) -> do - writeIORef ref new_hsc_env + Just (new_IC, names, hval) -> do -- set the onBreakAction to be performed when we hit a -- breakpoint this is visible in the Byte Code -- Interpreter, thus it is a global variable, -- implemented with stable pointers - stablePtr <- setBreakAction breakMVar statusMVar names + stablePtr <- setBreakAction breakMVar statusMVar let thing_to_run = unsafeCoerce# hval :: IO [HValue] status <- sandboxIO statusMVar thing_to_run freeStablePtr stablePtr -- be careful not to leak stable pointers! - handleRunStatus ref (hsc_IC new_hsc_env) names status + handleRunStatus ref new_IC names (hsc_IC hsc_env) + breakMVar statusMVar status -handleRunStatus ref ic names status = +handleRunStatus ref final_ic final_names resume_ic breakMVar statusMVar status = case status of -- did we hit a breakpoint or did we complete? - (Break apStack info tid breakMVar statusMVar final_names) -> do + (Break apStack info tid) -> do hsc_env <- readIORef ref (new_hsc_env, names) <- extendEnvironment hsc_env apStack (breakInfo_vars info) writeIORef ref new_hsc_env let res = ResumeHandle breakMVar statusMVar final_names - ic names + final_ic resume_ic names return (RunBreak tid names info res) (Complete either_hvals) -> case either_hvals of Left e -> return (RunException e) Right hvals -> do - Linker.extendLinkEnv (zip names hvals) - return (RunOk names) - + hsc_env <- readIORef ref + writeIORef ref hsc_env{hsc_IC=final_ic} + Linker.extendLinkEnv (zip final_names hvals) + return (RunOk final_names) + -- this points to the IO action that is executed when a breakpoint is hit foreign import ccall "&breakPointIOAction" breakPointIOAction :: Ptr (StablePtr (BreakInfo -> HValue -> IO ())) @@ -2212,33 +2230,33 @@ sandboxIO statusMVar thing = do putMVar interruptTargetThread (child:ts) takeMVar statusMVar `finally` modifyMVar_ interruptTargetThread (return.tail) -setBreakAction breakMVar statusMVar final_names = do +setBreakAction breakMVar statusMVar = do stablePtr <- newStablePtr onBreak poke breakPointIOAction stablePtr return stablePtr where onBreak ids apStack = do tid <- myThreadId - putMVar statusMVar (Break apStack ids tid breakMVar statusMVar - final_names) + putMVar statusMVar (Break apStack ids tid) takeMVar breakMVar resume :: Session -> ResumeHandle -> IO RunResult resume (Session ref) res@(ResumeHandle breakMVar statusMVar - final_names ic names) + final_names final_ic resume_ic names) = do -- restore the original interactive context. This is not entirely -- satisfactory: any new bindings made since the breakpoint stopped -- will be dropped from the interactive context, but not from the -- linker's environment. hsc_env <- readIORef ref - writeIORef ref hsc_env{ hsc_IC = ic } + writeIORef ref hsc_env{ hsc_IC = resume_ic } Linker.deleteFromLinkEnv names - stablePtr <- setBreakAction breakMVar statusMVar final_names + stablePtr <- setBreakAction breakMVar statusMVar putMVar breakMVar () -- this awakens the stopped thread... status <- takeMVar statusMVar -- and wait for the result freeStablePtr stablePtr -- be careful not to leak stable pointers! - handleRunStatus ref ic names status + handleRunStatus ref final_ic final_names resume_ic + breakMVar statusMVar status {- -- This version of sandboxIO runs the expression in a completely new @@ -2308,7 +2326,7 @@ extendEnvironment hsc_env apStack idsOffsets = do new_type_env = extendTypeEnvWithIds filtered_type_env (typed_ids) new_ic = ictxt { ic_rn_local_env = new_rn_env, ic_type_env = new_type_env } - Linker.extendLinkEnv (zip names hValues) -- ToDo: we must remember to restore the old env after we finish a breakpoint + Linker.extendLinkEnv (zip names hValues) return (hsc_env{hsc_IC = new_ic}, names) where globaliseAndTidy :: Id -> Id