-----------------------------------------------------------------------------
\begin{code}
-module DsBreakpoint(
- dsAndThenMaybeInsertBreakpoint
+module DsBreakpoint( debug_enabled
+ , dsAndThenMaybeInsertBreakpoint
, maybeInsertBreakpoint
, breakpoints_enabled
, mkBreakpointExpr
import TysWiredIn
import PrelNames
import Module
-import PackageConfig
import SrcLoc
import TyCon
import TypeRep
import ErrUtils
import FastString
import DynFlags
+import MkId
import DsMonad
import {-#SOURCE#-}DsExpr ( dsLExpr )
import Data.IORef
import Foreign.StablePtr
import GHC.Exts
+
#ifdef GHCI
-mkBreakpointExpr :: SrcSpan -> Id -> DsM (LHsExpr Id)
-mkBreakpointExpr loc bkptFuncId = do
+mkBreakpointExpr :: SrcSpan -> Id -> Type -> DsM (LHsExpr Id)
+mkBreakpointExpr loc bkptFuncId ty = do
scope <- getScope
mod <- getModuleDs
- let mod_name = moduleNameFS$ moduleName mod
+ u <- newUnique
+ let valId = mkUserLocal (mkVarOcc "_result") u ty noSrcLoc
when (not instrumenting) $
warnDs (text "Extracted ids:" <+> (ppr scope $$
ppr (map idType scope)))
- stablePtr <- ioToIOEnv $ newStablePtr scope
- site <- if instrumenting
- then recordBkpt (srcSpanStart loc)
- else return 0
+ stablePtr <- ioToIOEnv $ newStablePtr (valId:scope)
+ site <- if instrumenting
+ then recordBkpt (srcSpanStart loc)
+ else return 0
ATyCon opaqueTyCon <- dsLookupGlobal opaqueTyConName
- jumpFuncId <- mkJumpFunc bkptFuncId
+ jumpFuncId <- mkJumpFunc bkptFuncId
+ Just mod_name_ref <- getModNameRefDs
let [opaqueDataCon] = tyConDataCons opaqueTyCon
opaqueId = dataConWrapId opaqueDataCon
opaqueTy = mkTyConApp opaqueTyCon []
(l(HsVar id)))
-- Yes, I know... I'm gonna burn in hell.
Ptr addr# = castStablePtrToPtr stablePtr
- hvals = ExplicitList opaqueTy (map wrapInOpaque scope)
- locInfo = nlTuple [ HsLit (HsString (packageIdFS$ modulePackageId mod))
- , HsLit (HsString mod_name)
+ locals = ExplicitList opaqueTy (map wrapInOpaque scope)
+ locInfo = nlTuple [ HsVar mod_name_ref
, HsLit (HsInt (fromIntegral site))]
funE = l$ HsVar jumpFuncId
- ptrE = l (HsLit (HsInt (fromIntegral (I# (addr2Int# addr#)))))
- hvalE = l hvals
- locE = l locInfo
- msgE = l (srcSpanLit loc)
- return $
- l(l(l(l(funE `HsApp` ptrE) `HsApp` hvalE) `HsApp` locE) `HsApp` msgE)
+ ptrE = (HsLit (HsInt (fromIntegral (I# (addr2Int# addr#)))))
+ locE = locInfo
+ msgE = srcSpanLit loc
+ argsE = nlTuple [ptrE, locals, msgE]
+ lazy_argsE = HsApp (l$ HsWrap (WpTyApp argsT) (HsVar lazyId)) (l argsE)
+ argsT = mkTupleType [intTy, mkListTy opaqueTy, stringTy]
+ return $
+ l(l(funE `HsApp` l locE) `HsApp` l lazy_argsE)
+
where l = L loc
nlTuple exps = ExplicitTuple (map noLoc exps) Boxed
--- isValidType (PredTy p `FunTy` ty ) = False -- TODO: Too restrictive ?
srcSpanLit :: SrcSpan -> HsExpr Id
srcSpanLit span = HsLit (HsString (mkFastString (showSDoc (ppr span))))
instrumenting = idName bkptFuncId == breakpointAutoName
+ mkTupleType tys = mkTupleTy Boxed (length tys) tys
#else
mkBreakpointExpr = undefined -- A stage1 ghc doesn't care about breakpoints
#endif
isValidType (AppTy a b) = isValidType a && isValidType b
isValidType (TyConApp con ts) = not (isUnLiftedTyCon con) &&
all isValidType ts
+-- isValidType (PredTy p `FunTy` ty ) = False -- TODO: Too restrictive ?
isValidType _ = True
-debug_enabled :: DsM Bool
-#if defined(GHCI) && defined(DEBUGGER)
-debug_enabled = do
- debugging <- doptDs Opt_Debugging
- b_enabled <- breakpoints_enabled
- return (debugging && b_enabled)
-#else
-debug_enabled = return False
-#endif
-
-isInstrumentationSpot (L loc e) = do
- ghcmode <- getGhcModeDs
- instrumenting <- debug_enabled
- return$ instrumenting
- && isGoodSrcSpan loc -- Avoids 'derived' code
- && (not$ isRedundant e)
-
-isEnabledNullScopeCoalescing = True
-isRedundant HsLet {} = True
-isRedundant HsDo {} = True
-isRedundant HsCase {} = False
-isRedundant _ = False
-
dynBreakpoint :: SrcSpan -> DsM (LHsExpr Id)
#ifdef DEBUG
dynBreakpoint loc | not (isGoodSrcSpan loc) =
where
tyvar = alphaTyVar
basicType extra opaqueTy =
- (FunTy intTy
- (FunTy (mkListTy opaqueTy)
- (FunTy (mkTupleType [stringTy, stringTy, intTy])
- (FunTy stringTy
+ (FunTy (mkTupleType [stringTy, intTy])
+ (FunTy (mkTupleType [intTy, mkListTy opaqueTy, stringTy])
(ForAllTy tyvar
(extra
(FunTy (TyVarTy tyvar)
- (TyVarTy tyvar))))))))
+ (TyVarTy tyvar))))))
build name extra = do
ATyCon opaqueTyCon <- dsLookupGlobal opaqueTyConName
return$ Id.mkGlobalId VanillaGlobal name
(basicType extra (mkTyConApp opaqueTyCon [])) vanillaIdInfo
mkTupleType tys = mkTupleTy Boxed (length tys) tys
-breakpoints_enabled :: DsM Bool
+debug_enabled, breakpoints_enabled :: DsM Bool
dsAndThenMaybeInsertBreakpoint :: LHsExpr Id -> DsM CoreExpr
maybeInsertBreakpoint :: LHsExpr Id -> Type -> DsM (LHsExpr Id)
-#ifdef GHCI
+#if defined(GHCI) && defined(DEBUGGER)
+debug_enabled = do
+ debugging <- doptDs Opt_Debugging
+ b_enabled <- breakpoints_enabled
+ return (debugging && b_enabled)
+
+breakpoints_enabled = do
+ ghcMode <- getGhcModeDs
+ currentModule <- getModuleDs
+ ignore_breakpoints <- doptDs Opt_IgnoreBreakpoints
+ return ( not ignore_breakpoints
+ && ghcMode == Interactive
+ && currentModule /= iNTERACTIVE )
+
maybeInsertBreakpoint lhsexpr@(L loc _) ty = do
instrumenting <- isInstrumentationSpot lhsexpr
scope <- getScope
return (bkptCore `App` coreExpr)
else return coreExpr
where l = L loc
-
-breakpoints_enabled = do
- ghcMode <- getGhcModeDs
- currentModule <- getModuleDs
- ignore_breakpoints <- doptDs Opt_IgnoreBreakpoints
- return ( not ignore_breakpoints
- && ghcMode == Interactive
- && currentModule /= iNTERACTIVE )
#else
maybeInsertBreakpoint expr _ = return expr
dsAndThenMaybeInsertBreakpoint coreExpr = dsLExpr coreExpr
breakpoints_enabled = return False
+debug_enabled = return False
#endif
+
+
+isInstrumentationSpot (L loc e) = do
+ ghcmode <- getGhcModeDs
+ instrumenting <- debug_enabled
+ return$ instrumenting
+ && isGoodSrcSpan loc -- Avoids 'derived' code
+ && (not$ isRedundant e)
+
+isEnabledNullScopeCoalescing = True
+isRedundant HsLet {} = True
+isRedundant HsDo {} = True
+isRedundant HsCase {} = False
+isRedundant _ = False
+
\end{code}