3 % (c) University of Glasgow, 2007
5 \section[Coverage]{@coverage@: the main function}
9 -- The above warning supression flag is a temporary kludge.
10 -- While working on this module you are encouraged to remove it and fix
11 -- any warnings in the module. See
12 -- http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
15 module Coverage (addCoverageTicksToBinds) where
17 #include "HsVersions.h"
41 import System.Time (ClockTime(..))
42 import System.IO (FilePath)
43 #if __GLASGOW_HASKELL__ < 603
44 import Compat.Directory ( createDirectoryIfMissing )
46 import System.Directory ( createDirectoryIfMissing )
53 import Data.HashTable ( hashString )
57 %************************************************************************
59 %* The main function: addCoverageTicksToBinds
61 %************************************************************************
64 addCoverageTicksToBinds
67 -> ModLocation -- of the current module
68 -> [TyCon] -- type constructor in this module
70 -> IO (LHsBinds Id, HpcInfo, ModBreaks)
72 addCoverageTicksToBinds dflags mod mod_loc tyCons binds = do
75 case ml_hs_file mod_loc of
77 Nothing -> panic "can not find the original file during hpc trans"
79 if "boot" `isSuffixOf` orig_file then return (binds, emptyHpcInfo False, emptyModBreaks) else do
81 let mod_name = moduleNameString (moduleName mod)
84 = unTM (addTickLHsBinds binds)
86 { fileName = mkFastString orig_file
88 , inScope = emptyVarSet
89 , blackList = listToFM [ (getSrcSpan (tyConName tyCon),())
97 let entries = reverse $ mixEntries st
99 -- write the mix entries for this module
100 hashNo <- if opt_Hpc then do
101 let hpc_dir = hpcDir dflags
103 let hpc_mod_dir = if modulePackageId mod == mainPackageId
105 else hpc_dir ++ "/" ++ packageIdString (modulePackageId mod)
107 let tabStop = 1 -- <tab> counts as a normal char in GHC's location ranges.
108 createDirectoryIfMissing True hpc_mod_dir
109 modTime <- getModificationTime orig_file
110 let entries' = [ (hpcPos, box)
111 | (span,_,box) <- entries, hpcPos <- [mkHpcPos span] ]
112 when (length entries' /= tickBoxCount st) $ do
113 panic "the number of .mix entries are inconsistent"
114 let hashNo = mixHash orig_file modTime tabStop entries'
115 mixCreate hpc_mod_dir mod_name
116 $ Mix orig_file modTime (toHash hashNo) tabStop entries'
121 -- Todo: use proper src span type
122 breakArray <- newBreakArray $ length entries
124 let locsTicks = listArray (0,tickBoxCount st-1)
125 [ span | (span,_,_) <- entries ]
126 varsTicks = listArray (0,tickBoxCount st-1)
127 [ vars | (_,vars,_) <- entries ]
128 modBreaks = emptyModBreaks
129 { modBreaks_flags = breakArray
130 , modBreaks_locs = locsTicks
131 , modBreaks_vars = varsTicks
134 doIfSet_dyn dflags Opt_D_dump_hpc $ do
135 printDump (pprLHsBinds binds1)
137 return (binds1, HpcInfo (tickBoxCount st) hashNo, modBreaks)
142 liftL :: (Monad m) => (a -> m a) -> Located a -> m (Located a)
143 liftL f (L loc a) = do
147 addTickLHsBinds :: LHsBinds Id -> TM (LHsBinds Id)
148 addTickLHsBinds binds = mapBagM addTickLHsBind binds
150 addTickLHsBind :: LHsBind Id -> TM (LHsBind Id)
151 addTickLHsBind (L pos t@(AbsBinds abs_tvs abs_dicts abs_exports abs_binds)) = do
152 abs_binds' <- addTickLHsBinds abs_binds
153 return $ L pos $ AbsBinds abs_tvs abs_dicts abs_exports abs_binds'
154 addTickLHsBind (L pos (funBind@(FunBind { fun_id = (L _ id) }))) = do
155 let name = getOccString id
156 decl_path <- getPathEntry
158 (fvs, mg@(MatchGroup matches' ty)) <-
161 addTickMatchGroup (fun_matches funBind)
163 blackListed <- isBlackListed pos
165 -- Todo: we don't want redundant ticks on simple pattern bindings
166 -- We don't want to generate code for blacklisted positions
167 if blackListed || (not opt_Hpc && isSimplePatBind funBind)
169 return $ L pos $ funBind { fun_matches = MatchGroup matches' ty
173 tick_no <- allocATickBox (if null decl_path
174 then TopLevelBox [name]
175 else LocalBox (decl_path ++ [name]))
178 return $ L pos $ funBind { fun_matches = MatchGroup matches' ty
182 -- a binding is a simple pattern binding if it is a funbind with zero patterns
183 isSimplePatBind :: HsBind a -> Bool
184 isSimplePatBind funBind = matchGroupArity (fun_matches funBind) == 0
186 -- TODO: Revisit this
187 addTickLHsBind (L pos (pat@(PatBind { pat_rhs = rhs }))) = do
189 rhs' <- addPathEntry name $ addTickGRHSs False rhs
191 decl_path <- getPathEntry
192 tick_me <- allocTickBox (if null decl_path
193 then TopLevelBox [name]
194 else LocalBox (name : decl_path))
196 return $ L pos $ pat { pat_rhs = rhs' }
198 {- only internal stuff, not from source, uses VarBind, so we ignore it.
199 addTickLHsBind (VarBind var_id var_rhs) = do
200 var_rhs' <- addTickLHsExpr var_rhs
201 return $ VarBind var_id var_rhs'
203 addTickLHsBind other = return other
205 -- Add a tick to the expression no matter what it is. There is one exception:
206 -- for the debugger, if the expression is a 'let', then we don't want to add
207 -- a tick here because there will definititely be a tick on the body anyway.
208 addTickLHsExprAlways :: LHsExpr Id -> TM (LHsExpr Id)
209 addTickLHsExprAlways (L pos e0)
210 | not opt_Hpc, HsLet _ _ <- e0 = addTickLHsExprNever (L pos e0)
211 | otherwise = allocTickBox (ExpBox False) pos $ addTickHsExpr e0
213 addTickLHsExprNeverOrAlways :: LHsExpr Id -> TM (LHsExpr Id)
214 addTickLHsExprNeverOrAlways e
215 | opt_Hpc = addTickLHsExprNever e
216 | otherwise = addTickLHsExprAlways e
218 addTickLHsExprNeverOrMaybe :: LHsExpr Id -> TM (LHsExpr Id)
219 addTickLHsExprNeverOrMaybe e
220 | opt_Hpc = addTickLHsExprNever e
221 | otherwise = addTickLHsExpr e
223 -- version of addTick that does not actually add a tick,
224 -- because the scope of this tick is completely subsumed by
226 addTickLHsExprNever :: LHsExpr Id -> TM (LHsExpr Id)
227 addTickLHsExprNever (L pos e0) = do
228 e1 <- addTickHsExpr e0
231 -- selectively add ticks to interesting expressions
232 addTickLHsExpr :: LHsExpr Id -> TM (LHsExpr Id)
233 addTickLHsExpr (L pos e0) = do
234 if opt_Hpc || isGoodBreakExpr e0
236 allocTickBox (ExpBox False) pos $ addTickHsExpr e0
238 e1 <- addTickHsExpr e0
241 -- general heuristic: expressions which do not denote values are good break points
242 isGoodBreakExpr :: HsExpr Id -> Bool
243 isGoodBreakExpr (HsApp {}) = True
244 isGoodBreakExpr (OpApp {}) = True
245 isGoodBreakExpr (NegApp {}) = True
246 isGoodBreakExpr (HsCase {}) = True
247 isGoodBreakExpr (HsIf {}) = True
248 isGoodBreakExpr (RecordCon {}) = True
249 isGoodBreakExpr (RecordUpd {}) = True
250 isGoodBreakExpr (ArithSeq {}) = True
251 isGoodBreakExpr (PArrSeq {}) = True
252 isGoodBreakExpr other = False
254 addTickLHsExprOptAlt :: Bool -> LHsExpr Id -> TM (LHsExpr Id)
255 addTickLHsExprOptAlt oneOfMany (L pos e0)
256 | not opt_Hpc = addTickLHsExpr (L pos e0)
258 allocTickBox (ExpBox oneOfMany) pos $
261 addBinTickLHsExpr :: (Bool -> BoxLabel) -> LHsExpr Id -> TM (LHsExpr Id)
262 addBinTickLHsExpr boxLabel (L pos e0) = do
263 e1 <- addTickHsExpr e0
264 allocBinTickBox boxLabel $ L pos e1
266 addTickHsExpr :: HsExpr Id -> TM (HsExpr Id)
267 addTickHsExpr e@(HsVar id) = do freeVar id; return e
268 addTickHsExpr e@(HsIPVar _) = return e
269 addTickHsExpr e@(HsOverLit _) = return e
270 addTickHsExpr e@(HsLit _) = return e
271 addTickHsExpr e@(HsLam matchgroup) =
272 liftM HsLam (addTickMatchGroup matchgroup)
273 addTickHsExpr (HsApp e1 e2) =
274 liftM2 HsApp (addTickLHsExprNever e1) (addTickLHsExpr e2)
275 addTickHsExpr (OpApp e1 e2 fix e3) =
278 (addTickLHsExprNever e2)
281 addTickHsExpr (NegApp e neg) =
284 (addTickSyntaxExpr hpcSrcSpan neg)
285 addTickHsExpr (HsPar e) = liftM HsPar (addTickLHsExprNeverOrMaybe e)
286 addTickHsExpr (SectionL e1 e2) =
290 addTickHsExpr (SectionR e1 e2) =
294 addTickHsExpr (HsCase e mgs) =
297 (addTickMatchGroup mgs)
298 addTickHsExpr (HsIf e1 e2 e3) =
300 (addBinTickLHsExpr (BinBox CondBinBox) e1)
301 (addTickLHsExprOptAlt True e2)
302 (addTickLHsExprOptAlt True e3)
303 addTickHsExpr (HsLet binds e) =
304 bindLocals (map unLoc $ collectLocalBinders binds) $
306 (addTickHsLocalBinds binds) -- to think about: !patterns.
307 (addTickLHsExprNeverOrAlways e)
308 addTickHsExpr (HsDo cxt stmts last_exp srcloc) = do
309 (stmts', last_exp') <- addTickLStmts' forQual stmts
310 (addTickLHsExpr last_exp)
311 return (HsDo cxt stmts' last_exp' srcloc)
313 forQual = case cxt of
314 ListComp -> Just $ BinBox QualBinBox
316 addTickHsExpr (ExplicitList ty es) =
319 (mapM (addTickLHsExpr) es)
320 addTickHsExpr (ExplicitPArr ty es) =
323 (mapM (addTickLHsExpr) es)
324 addTickHsExpr (ExplicitTuple es box) =
326 (mapM (addTickLHsExpr) es)
328 addTickHsExpr (RecordCon id ty rec_binds) =
332 (addTickHsRecordBinds rec_binds)
333 addTickHsExpr (RecordUpd e rec_binds cons tys1 tys2) =
336 (addTickHsRecordBinds rec_binds)
337 (return cons) (return tys1) (return tys2)
339 addTickHsExpr (ExprWithTySigOut e ty) =
340 liftM2 ExprWithTySigOut
341 (addTickLHsExprNever e) -- No need to tick the inner expression
342 -- for expressions with signatures
344 addTickHsExpr (ArithSeq ty arith_seq) =
347 (addTickArithSeqInfo arith_seq)
348 addTickHsExpr (HsTickPragma (file,(l1,c1),(l2,c2)) (L pos e0)) = do
349 e2 <- allocTickBox (ExpBox False) pos $
352 addTickHsExpr (PArrSeq ty arith_seq) =
355 (addTickArithSeqInfo arith_seq)
356 addTickHsExpr (HsSCC nm e) =
360 addTickHsExpr (HsCoreAnn nm e) =
364 addTickHsExpr e@(HsBracket {}) = return e
365 addTickHsExpr e@(HsBracketOut {}) = return e
366 addTickHsExpr e@(HsSpliceE {}) = return e
367 addTickHsExpr (HsProc pat cmdtop) =
370 (liftL (addTickHsCmdTop) cmdtop)
371 addTickHsExpr (HsWrap w e) =
374 (addTickHsExpr e) -- explicitly no tick on inside
375 addTickHsExpr (HsArrApp e1 e2 ty1 arr_ty lr) =
382 addTickHsExpr (HsArrForm e fix cmdtop) =
386 (mapM (liftL (addTickHsCmdTop)) cmdtop)
388 addTickHsExpr e@(HsType ty) = return e
390 -- Others dhould never happen in expression content.
391 addTickHsExpr e@(ExprWithTySig {}) = pprPanic "addTickHsExpr" (ppr e)
392 addTickHsExpr e@(EAsPat _ _) = pprPanic "addTickHsExpr" (ppr e)
393 addTickHsExpr e@(ELazyPat _) = pprPanic "addTickHsExpr" (ppr e)
394 addTickHsExpr e@(EWildPat) = pprPanic "addTickHsExpr" (ppr e)
395 addTickHsExpr e@(HsBinTick _ _ _) = pprPanic "addTickHsExpr" (ppr e)
396 addTickHsExpr e@(HsTick _ _ _) = pprPanic "addTickHsExpr" (ppr e)
398 addTickMatchGroup (MatchGroup matches ty) = do
399 let isOneOfMany = matchesOneOfMany matches
400 matches' <- mapM (liftL (addTickMatch isOneOfMany)) matches
401 return $ MatchGroup matches' ty
403 addTickMatch :: Bool -> Match Id -> TM (Match Id)
404 addTickMatch isOneOfMany (Match pats opSig gRHSs) =
405 bindLocals (collectPatsBinders pats) $ do
406 gRHSs' <- addTickGRHSs isOneOfMany gRHSs
407 return $ Match pats opSig gRHSs'
409 addTickGRHSs :: Bool -> GRHSs Id -> TM (GRHSs Id)
410 addTickGRHSs isOneOfMany (GRHSs guarded local_binds) = do
411 bindLocals binders $ do
412 local_binds' <- addTickHsLocalBinds local_binds
413 guarded' <- mapM (liftL (addTickGRHS isOneOfMany)) guarded
414 return $ GRHSs guarded' local_binds'
416 binders = map unLoc (collectLocalBinders local_binds)
418 addTickGRHS :: Bool -> GRHS Id -> TM (GRHS Id)
419 addTickGRHS isOneOfMany (GRHS stmts expr) = do
420 (stmts',expr') <- addTickLStmts' (Just $ BinBox $ GuardBinBox) stmts
421 (if opt_Hpc then addTickLHsExprOptAlt isOneOfMany expr
422 else addTickLHsExprAlways expr)
423 return $ GRHS stmts' expr'
425 addTickLStmts :: (Maybe (Bool -> BoxLabel)) -> [LStmt Id] -> TM [LStmt Id]
426 addTickLStmts isGuard stmts = do
427 (stmts, _) <- addTickLStmts' isGuard stmts (return ())
430 addTickLStmts' :: (Maybe (Bool -> BoxLabel)) -> [LStmt Id] -> TM a
431 -> TM ([LStmt Id], a)
432 addTickLStmts' isGuard lstmts res
433 = bindLocals binders $ do
434 lstmts' <- mapM (liftL (addTickStmt isGuard)) lstmts
438 binders = map unLoc (collectLStmtsBinders lstmts)
440 addTickStmt :: (Maybe (Bool -> BoxLabel)) -> Stmt Id -> TM (Stmt Id)
441 addTickStmt isGuard (BindStmt pat e bind fail) = do
444 (addTickLHsExprAlways e)
445 (addTickSyntaxExpr hpcSrcSpan bind)
446 (addTickSyntaxExpr hpcSrcSpan fail)
447 addTickStmt isGuard (ExprStmt e bind' ty) = do
450 (addTickSyntaxExpr hpcSrcSpan bind')
453 addTick e | Just fn <- isGuard = addBinTickLHsExpr fn e
454 | otherwise = addTickLHsExprAlways e
456 addTickStmt isGuard (LetStmt binds) = do
458 (addTickHsLocalBinds binds)
459 addTickStmt isGuard (ParStmt pairs) = do
460 liftM ParStmt (mapM process pairs)
462 process (stmts,ids) =
464 (addTickLStmts isGuard stmts)
466 addTickStmt isGuard (RecStmt stmts ids1 ids2 tys dictbinds) = do
468 (addTickLStmts isGuard stmts)
472 (addTickDictBinds dictbinds)
474 addTickHsLocalBinds :: HsLocalBinds Id -> TM (HsLocalBinds Id)
475 addTickHsLocalBinds (HsValBinds binds) =
477 (addTickHsValBinds binds)
478 addTickHsLocalBinds (HsIPBinds binds) =
480 (addTickHsIPBinds binds)
481 addTickHsLocalBinds (EmptyLocalBinds) = return EmptyLocalBinds
483 addTickHsValBinds (ValBindsOut binds sigs) =
485 (mapM (\ (rec,binds') ->
488 (addTickLHsBinds binds'))
492 addTickHsIPBinds (IPBinds ipbinds dictbinds) =
494 (mapM (liftL (addTickIPBind)) ipbinds)
495 (addTickDictBinds dictbinds)
497 addTickIPBind :: IPBind Id -> TM (IPBind Id)
498 addTickIPBind (IPBind nm e) =
503 -- There is no location here, so we might need to use a context location??
504 addTickSyntaxExpr :: SrcSpan -> SyntaxExpr Id -> TM (SyntaxExpr Id)
505 addTickSyntaxExpr pos x = do
506 L _ x' <- addTickLHsExpr (L pos x)
508 -- we do not walk into patterns.
509 addTickLPat :: LPat Id -> TM (LPat Id)
510 addTickLPat pat = return pat
512 addTickHsCmdTop :: HsCmdTop Id -> TM (HsCmdTop Id)
513 addTickHsCmdTop (HsCmdTop cmd tys ty syntaxtable) =
520 addTickLHsCmd :: LHsCmd Id -> TM (LHsCmd Id)
521 addTickLHsCmd x = addTickLHsExpr x
523 addTickDictBinds :: DictBinds Id -> TM (DictBinds Id)
524 addTickDictBinds x = addTickLHsBinds x
526 addTickHsRecordBinds :: HsRecordBinds Id -> TM (HsRecordBinds Id)
527 addTickHsRecordBinds (HsRecFields fields dd)
528 = do { fields' <- mapM process fields
529 ; return (HsRecFields fields' dd) }
531 process (HsRecField ids expr doc)
532 = do { expr' <- addTickLHsExpr expr
533 ; return (HsRecField ids expr' doc) }
535 addTickArithSeqInfo :: ArithSeqInfo Id -> TM (ArithSeqInfo Id)
536 addTickArithSeqInfo (From e1) =
539 addTickArithSeqInfo (FromThen e1 e2) =
543 addTickArithSeqInfo (FromTo e1 e2) =
547 addTickArithSeqInfo (FromThenTo e1 e2 e3) =
555 data TickTransState = TT { tickBoxCount:: Int
556 , mixEntries :: [MixEntry_]
559 data TickTransEnv = TTE { fileName :: FastString
560 , declPath :: [String]
562 , blackList :: FiniteMap SrcSpan ()
567 type FreeVars = OccEnv Id
571 -- For breakpoints we want to collect the free variables of an
572 -- expression for pinning on the HsTick. We don't want to collect
573 -- *all* free variables though: in particular there's no point pinning
574 -- on free variables that are will otherwise be in scope at the GHCi
575 -- prompt, which means all top-level bindings. Unfortunately detecting
576 -- top-level bindings isn't easy (collectHsBindsBinders on the top-level
577 -- bindings doesn't do it), so we keep track of a set of "in-scope"
578 -- variables in addition to the free variables, and the former is used
579 -- to filter additions to the latter. This gives us complete control
580 -- over what free variables we track.
582 data TM a = TM { unTM :: TickTransEnv -> TickTransState -> (a,FreeVars,TickTransState) }
583 -- a combination of a state monad (TickTransState) and a writer
586 instance Monad TM where
587 return a = TM $ \ env st -> (a,noFVs,st)
588 (TM m) >>= k = TM $ \ env st ->
591 case unTM (k r1) env st1 of
593 (r2, fv1 `plusOccEnv` fv2, st2)
595 -- getState :: TM TickTransState
596 -- getState = TM $ \ env st -> (st, noFVs, st)
598 setState :: (TickTransState -> TickTransState) -> TM ()
599 setState f = TM $ \ env st -> ((), noFVs, f st)
601 getEnv :: TM TickTransEnv
602 getEnv = TM $ \ env st -> (env, noFVs, st)
604 withEnv :: (TickTransEnv -> TickTransEnv) -> TM a -> TM a
605 withEnv f (TM m) = TM $ \ env st ->
607 (a, fvs, st') -> (a, fvs, st')
609 getFreeVars :: TM a -> TM (FreeVars, a)
611 = TM $ \ env st -> case m env st of (a, fv, st') -> ((fv,a), fv, st')
613 freeVar :: Id -> TM ()
614 freeVar id = TM $ \ env st ->
615 if id `elemVarSet` inScope env
616 then ((), unitOccEnv (nameOccName (idName id)) id, st)
619 addPathEntry :: String -> TM a -> TM a
620 addPathEntry nm = withEnv (\ env -> env { declPath = declPath env ++ [nm] })
622 getPathEntry :: TM [String]
623 getPathEntry = declPath `liftM` getEnv
625 getFileName :: TM FastString
626 getFileName = fileName `liftM` getEnv
628 sameFileName :: SrcSpan -> TM a -> TM a -> TM a
629 sameFileName pos out_of_scope in_scope = do
630 file_name <- getFileName
631 case optSrcSpanFileName pos of
633 | file_name == file_name2 -> in_scope
636 bindLocals :: [Id] -> TM a -> TM a
637 bindLocals new_ids (TM m)
639 case m env{ inScope = inScope env `extendVarSetList` new_ids } st of
640 (r, fv, st') -> (r, fv `delListFromUFM` occs, st')
641 where occs = [ nameOccName (idName id) | id <- new_ids ]
643 isBlackListed :: SrcSpan -> TM Bool
644 isBlackListed pos = TM $ \ env st ->
645 case lookupFM (blackList env) pos of
646 Nothing -> (False,noFVs,st)
647 Just () -> (True,noFVs,st)
649 -- the tick application inherits the source position of its
650 -- expression argument to support nested box allocations
651 allocTickBox :: BoxLabel -> SrcSpan -> TM (HsExpr Id) -> TM (LHsExpr Id)
652 allocTickBox boxLabel pos m | isGoodSrcSpan' pos =
654 (do e <- m; return (L pos e)) $ do
655 (fvs, e) <- getFreeVars m
657 let c = tickBoxCount st
660 me = (pos, map (nameOccName.idName) ids, boxLabel)
662 ( L pos (HsTick c ids (L pos e))
664 , st {tickBoxCount=c+1,mixEntries=me:mes}
666 allocTickBox boxLabel pos m = do e <- m; return (L pos e)
668 -- the tick application inherits the source position of its
669 -- expression argument to support nested box allocations
670 allocATickBox :: BoxLabel -> SrcSpan -> FreeVars -> TM (Maybe (Int,[Id]))
671 allocATickBox boxLabel pos fvs | isGoodSrcSpan' pos =
673 (return Nothing) $ TM $ \ env st ->
674 let me = (pos, map (nameOccName.idName) ids, boxLabel)
680 , st {tickBoxCount=c+1, mixEntries=me:mes}
682 allocATickBox boxLabel pos fvs = return Nothing
684 allocBinTickBox :: (Bool -> BoxLabel) -> LHsExpr Id -> TM (LHsExpr Id)
685 allocBinTickBox boxLabel (L pos e) | isGoodSrcSpan' pos = TM $ \ env st ->
686 let meT = (pos,[],boxLabel True)
687 meF = (pos,[],boxLabel False)
688 meE = (pos,[],ExpBox False)
693 then ( L pos $ HsTick c [] $ L pos $ HsBinTick (c+1) (c+2) (L pos e)
694 -- notice that F and T are reversed,
695 -- because we are building the list in
698 , st {tickBoxCount=c+3 , mixEntries=meF:meT:meE:mes}
701 ( L pos $ HsTick c [] $ L pos e
703 , st {tickBoxCount=c+1,mixEntries=meE:mes}
706 allocBinTickBox boxLabel e = return e
709 | not (isGoodSrcSpan pos) = False
710 | start == end = False
713 start = srcSpanStart pos
716 mkHpcPos :: SrcSpan -> HpcPos
718 | not (isGoodSrcSpan' pos) = panic "bad source span; expected such spans to be filtered out"
721 start = srcSpanStart pos
723 hpcPos = toHpcPos ( srcLocLine start
724 , srcLocCol start + 1
729 noHpcPos = toHpcPos (0,0,0,0)
731 hpcSrcSpan = mkGeneralSrcSpan (FSLIT("Haskell Program Coverage internals"))
736 matchesOneOfMany :: [LMatch Id] -> Bool
737 matchesOneOfMany lmatches = sum (map matchCount lmatches) > 1
739 matchCount (L _ (Match _pats _ty (GRHSs grhss _binds))) = length grhss
744 type MixEntry_ = (SrcSpan, [OccName], BoxLabel)
746 -- For the hash value, we hash everything: the file name,
747 -- the timestamp of the original source file, the tab stop,
748 -- and the mix entries. We cheat, and hash the show'd string.
749 -- This hash only has to be hashed at Mix creation time,
750 -- and is for sanity checking only.
752 mixHash :: FilePath -> Integer -> Int -> [MixEntry] -> Int
753 mixHash file tm tabstop entries = fromIntegral $ hashString
754 (show $ Mix file tm 0 tabstop entries)