1 -----------------------------------------------------------------------------
3 -- (c) The University of Glasgow 2001-2003
5 -- Access to system tools: gcc, cp, rm etc
7 -----------------------------------------------------------------------------
14 -- Interface to system tools
15 runUnlit, runCpp, runCc, -- [Option] -> IO ()
16 runPp, -- [Option] -> IO ()
17 runMangle, runSplit, -- [Option] -> IO ()
18 runAs, runLink, -- [Option] -> IO ()
22 touch, -- String -> String -> IO ()
27 -- Temporary-file management
30 cleanTempDirs, cleanTempFiles, cleanTempFilesExcept,
37 #include "HsVersions.h"
48 import Control.Exception
52 import System.Environment
53 import System.FilePath
55 import SYSTEM_IO_ERROR as IO
56 import System.Directory
61 #ifndef mingw32_HOST_OS
62 import qualified System.Posix.Internals
63 #else /* Must be Win32 */
65 import CString ( CString, peekCString )
68 import System.Process ( runInteractiveProcess, getProcessExitCode )
69 import Control.Concurrent
71 import SrcLoc ( SrcLoc, mkSrcLoc, noSrcSpan, mkSrcSpan )
75 The configuration story
76 ~~~~~~~~~~~~~~~~~~~~~~~
78 GHC needs various support files (library packages, RTS etc), plus
79 various auxiliary programs (cp, gcc, etc). It finds these in one
82 * When running as an *installed program*, GHC finds most of this support
83 stuff in the installed library tree. The path to this tree is passed
84 to GHC via the -B flag, and given to initSysTools .
86 * When running *in-place* in a build tree, GHC finds most of this support
87 stuff in the build tree. The path to the build tree is, again passed
90 GHC tells which of the two is the case by seeing whether package.conf
91 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
94 SysTools.initSysProgs figures out exactly where all the auxiliary programs
95 are, and initialises mutable variables to make it easy to call them.
96 To to this, it makes use of definitions in Config.hs, which is a Haskell
97 file containing variables whose value is figured out by the build system.
99 Config.hs contains two sorts of things
101 cGCC, The *names* of the programs
104 etc They do *not* include paths
107 cUNLIT_DIR_REL The *path* to the directory containing unlit, split etc
108 cSPLIT_DIR_REL *relative* to the root of the build tree,
109 for use when running *in-place* in a build tree (only)
113 ---------------------------------------------
114 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
116 Another hair-brained scheme for simplifying the current tool location
117 nightmare in GHC: Simon originally suggested using another
118 configuration file along the lines of GCC's specs file - which is fine
119 except that it means adding code to read yet another configuration
120 file. What I didn't notice is that the current package.conf is
121 general enough to do this:
124 {name = "tools", import_dirs = [], source_dirs = [],
125 library_dirs = [], hs_libraries = [], extra_libraries = [],
126 include_dirs = [], c_includes = [], package_deps = [],
127 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${topdir}/bin/unlit", ... etc.],
128 extra_cc_opts = [], extra_ld_opts = []}
130 Which would have the advantage that we get to collect together in one
131 place the path-specific package stuff with the path-specific tool
134 ---------------------------------------------
136 %************************************************************************
138 \subsection{Initialisation}
140 %************************************************************************
143 initSysTools :: Maybe String -- Maybe TopDir path (without the '-B' prefix)
146 -> IO DynFlags -- Set all the mutable variables above, holding
147 -- (a) the system programs
148 -- (b) the package-config file
149 -- (c) the GHC usage message
152 initSysTools mbMinusB _
153 = do { (am_installed, top_dir) <- findTopDir mbMinusB
155 -- for "installed" this is the root of GHC's support files
156 -- for "in-place" it is the root of the build tree
157 -- NB: top_dir is assumed to be in standard Unix
158 -- format, '/' separated
160 ; let installed, installed_bin :: FilePath -> FilePath
161 installed_bin pgm = top_dir </> pgm
162 installed file = top_dir </> file
163 inplace dir pgm = top_dir </> dir </> pgm
166 | am_installed = installed "package.conf"
167 | otherwise = inplace cGHC_DRIVER_DIR_REL "package.conf.inplace"
170 | am_installed = installed "ghc-usage.txt"
171 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghc-usage.txt"
174 | am_installed = installed "ghci-usage.txt"
175 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghci-usage.txt"
177 -- For all systems, unlit, split, mangle are GHC utilities
178 -- architecture-specific stuff is done when building Config.hs
180 | am_installed = installed_bin cGHC_UNLIT_PGM
181 | otherwise = inplace cGHC_UNLIT_DIR_REL cGHC_UNLIT_PGM
183 -- split and mangle are Perl scripts
185 | am_installed = installed_bin cGHC_SPLIT_PGM
186 | otherwise = inplace cGHC_SPLIT_DIR_REL cGHC_SPLIT_PGM
189 | am_installed = installed_bin cGHC_MANGLER_PGM
190 | otherwise = inplace cGHC_MANGLER_DIR_REL cGHC_MANGLER_PGM
193 | am_installed = installed_bin "bin/windres"
194 | otherwise = "windres"
196 ; let dflags0 = defaultDynFlags
198 ; tmpdir <- getTemporaryDirectory
199 ; let dflags1 = setTmpDir tmpdir dflags0
201 -- Check that the package config exists
202 ; config_exists <- doesFileExist pkgconfig_path
203 ; when (not config_exists) $
204 throwDyn (InstallationError
205 ("Can't find package.conf as " ++ pkgconfig_path))
207 -- On Windows, gcc and friends are distributed with GHC,
208 -- so when "installed" we look in TopDir/bin
209 -- When "in-place", or when not on Windows, we look wherever
210 -- the build-time configure script found them
212 -- The trailing "/" is absolutely essential; gcc seems
213 -- to construct file names simply by concatenating to
214 -- this -B path with no extra slash We use "/" rather
215 -- than "\\" because otherwise "\\\" is mangled
216 -- later on; although gcc_args are in NATIVE format,
218 -- (see comments with declarations of global variables)
219 gcc_b_arg = Option ("-B" ++ installed "gcc-lib/")
221 | isWindowsHost && am_installed
222 -- We tell gcc where its specs file + exes are (-B)
223 -- and also some places to pick up include files. We need
224 -- to be careful to put all necessary exes in the -B place
225 -- (as, ld, cc1, etc) since if they don't get found there,
226 -- gcc then tries to run unadorned "as", "ld", etc, and
227 -- will pick up whatever happens to be lying around in
228 -- the path, possibly including those from a cygwin
229 -- install on the target, which is exactly what we're
231 = (installed_bin "gcc", [gcc_b_arg])
232 | otherwise = (cGCC, [])
234 | isWindowsHost && am_installed = installed_bin cGHC_PERL
235 | otherwise = cGHC_PERL
236 -- 'touch' is a GHC util for Windows
240 then installed_bin cGHC_TOUCHY_PGM
241 else inplace cGHC_TOUCHY_DIR_REL cGHC_TOUCHY_PGM
242 | otherwise = "touch"
243 -- On Win32 we don't want to rely on #!/bin/perl, so we prepend
244 -- a call to Perl to get the invocation of split and mangle.
245 -- On Unix, scripts are invoked using the '#!' method. Binary
246 -- installations of GHC on Unix place the correct line on the
247 -- front of the script at installation time, so we don't want
248 -- to wire-in our knowledge of $(PERL) on the host system here.
249 (split_prog, split_args)
250 | isWindowsHost = (perl_path, [Option split_script])
251 | otherwise = (split_script, [])
252 (mangle_prog, mangle_args)
253 | isWindowsHost = (perl_path, [Option mangle_script])
254 | otherwise = (mangle_script, [])
255 (mkdll_prog, mkdll_args)
257 = panic "Can't build DLLs on a non-Win32 system"
259 (installed "gcc-lib/" </> cMKDLL,
260 [ Option "--dlltool-name",
261 Option (installed "gcc-lib/" </> "dlltool"),
262 Option "--driver-name",
263 Option gcc_prog, gcc_b_arg ])
264 | otherwise = (cMKDLL, [])
266 -- cpp is derived from gcc on all platforms
267 -- HACK, see setPgmP below. We keep 'words' here to remember to fix
268 -- Config.hs one day.
269 ; let cpp_path = (gcc_prog, gcc_args ++
270 (Option "-E"):(map Option (words cRAWCPP_FLAGS)))
272 -- Other things being equal, as and ld are simply gcc
273 ; let (as_prog,as_args) = (gcc_prog,gcc_args)
274 (ld_prog,ld_args) = (gcc_prog,gcc_args)
277 ghcUsagePath = ghc_usage_msg_path,
278 ghciUsagePath = ghci_usage_msg_path,
280 systemPackageConfig = pkgconfig_path,
284 pgm_c = (gcc_prog,gcc_args),
285 pgm_m = (mangle_prog,mangle_args),
286 pgm_s = (split_prog,split_args),
287 pgm_a = (as_prog,as_args),
288 pgm_l = (ld_prog,ld_args),
289 pgm_dll = (mkdll_prog,mkdll_args),
291 pgm_sysman = top_dir ++ "/ghc/rts/parallel/SysMan",
292 pgm_windres = windres_path
293 -- Hans: this isn't right in general, but you can
294 -- elaborate it in the same way as the others
301 -- for "installed" this is the root of GHC's support files
302 -- for "in-place" it is the root of the build tree
305 -- 1. Set proto_top_dir
306 -- if there is no given TopDir path, get the directory
307 -- where GHC is running (only on Windows)
309 -- 2. If package.conf exists in proto_top_dir, we are running
310 -- installed; and TopDir = proto_top_dir
312 -- 3. Otherwise we are running in-place, so
313 -- proto_top_dir will be /...stuff.../ghc/compiler
314 -- Set TopDir to /...stuff..., which is the root of the build tree
316 -- This is very gruesome indeed
318 findTopDir :: Maybe String -- Maybe TopDir path (without the '-B' prefix).
319 -> IO (Bool, -- True <=> am installed, False <=> in-place
320 String) -- TopDir (in Unix format '/' separated)
323 = do { top_dir <- get_proto
324 -- Discover whether we're running in a build tree or in an installation,
325 -- by looking for the package configuration file.
326 ; am_installed <- doesFileExist (top_dir </> "package.conf")
328 ; return (am_installed, top_dir)
331 -- get_proto returns a Unix-format path (relying on getBaseDir to do so too)
332 get_proto = case mbMinusB of
333 Just minusb -> return (normalise minusb)
335 -> do maybe_exec_dir <- getBaseDir -- Get directory of executable
336 case maybe_exec_dir of -- (only works on Windows;
337 -- returns Nothing on Unix)
338 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
339 Just dir -> return dir
343 %************************************************************************
345 \subsection{Running an external program}
347 %************************************************************************
351 runUnlit :: DynFlags -> [Option] -> IO ()
352 runUnlit dflags args = do
354 runSomething dflags "Literate pre-processor" p args
356 runCpp :: DynFlags -> [Option] -> IO ()
357 runCpp dflags args = do
358 let (p,args0) = pgm_P dflags
359 args1 = args0 ++ args
360 mb_env <- getGccEnv args1
361 runSomethingFiltered dflags id "C pre-processor" p args1 mb_env
363 runPp :: DynFlags -> [Option] -> IO ()
364 runPp dflags args = do
366 runSomething dflags "Haskell pre-processor" p args
368 runCc :: DynFlags -> [Option] -> IO ()
369 runCc dflags args = do
370 let (p,args0) = pgm_c dflags
371 args1 = args0 ++ args
372 mb_env <- getGccEnv args1
373 runSomethingFiltered dflags cc_filter "C Compiler" p args1 mb_env
375 -- discard some harmless warnings from gcc that we can't turn off
376 cc_filter = unlines . doFilter . lines
379 gcc gives warnings in chunks like so:
380 In file included from /foo/bar/baz.h:11,
381 from /foo/bar/baz2.h:22,
383 /foo/flibble:14: global register variable ...
384 /foo/flibble:15: warning: call-clobbered r...
385 We break it up into its chunks, remove any call-clobbered register
386 warnings from each chunk, and then delete any chunks that we have
389 doFilter = unChunkWarnings . filterWarnings . chunkWarnings []
390 -- We can't assume that the output will start with an "In file inc..."
391 -- line, so we start off expecting a list of warnings rather than a
393 chunkWarnings :: [String] -- The location stack to use for the next
395 -> [String] -- The remaining lines to look at
396 -> [([String], [String])]
397 chunkWarnings loc_stack [] = [(loc_stack, [])]
398 chunkWarnings loc_stack xs
399 = case break loc_stack_start xs of
400 (warnings, lss:xs') ->
401 case span loc_start_continuation xs' of
403 (loc_stack, warnings) : chunkWarnings (lss : lsc) xs''
404 _ -> [(loc_stack, xs)]
406 filterWarnings :: [([String], [String])] -> [([String], [String])]
407 filterWarnings [] = []
408 -- If the warnings are already empty then we are probably doing
409 -- something wrong, so don't delete anything
410 filterWarnings ((xs, []) : zs) = (xs, []) : filterWarnings zs
411 filterWarnings ((xs, ys) : zs) = case filter wantedWarning ys of
412 [] -> filterWarnings zs
413 ys' -> (xs, ys') : filterWarnings zs
415 unChunkWarnings :: [([String], [String])] -> [String]
416 unChunkWarnings [] = []
417 unChunkWarnings ((xs, ys) : zs) = xs ++ ys ++ unChunkWarnings zs
419 loc_stack_start s = "In file included from " `isPrefixOf` s
420 loc_start_continuation s = " from " `isPrefixOf` s
422 | "warning: call-clobbered register used" `isContainedIn` w = False
425 isContainedIn :: String -> String -> Bool
426 xs `isContainedIn` ys = any (xs `isPrefixOf`) (tails ys)
428 -- If the -B<dir> option is set, add <dir> to PATH. This works around
429 -- a bug in gcc on Windows Vista where it can't find its auxiliary
430 -- binaries (see bug #1110).
431 getGccEnv :: [Option] -> IO (Maybe [(String,String)])
433 #if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ < 603
438 else do env <- getEnvironment
439 return (Just (map mangle_path env))
441 (b_dirs, _) = partitionWith get_b_opt opts
443 get_b_opt (Option ('-':'B':dir)) = Left dir
444 get_b_opt other = Right other
446 mangle_path (path,paths) | map toUpper path == "PATH"
447 = (path, '\"' : head b_dirs ++ "\";" ++ paths)
448 mangle_path other = other
451 runMangle :: DynFlags -> [Option] -> IO ()
452 runMangle dflags args = do
453 let (p,args0) = pgm_m dflags
454 runSomething dflags "Mangler" p (args0++args)
456 runSplit :: DynFlags -> [Option] -> IO ()
457 runSplit dflags args = do
458 let (p,args0) = pgm_s dflags
459 runSomething dflags "Splitter" p (args0++args)
461 runAs :: DynFlags -> [Option] -> IO ()
462 runAs dflags args = do
463 let (p,args0) = pgm_a dflags
464 args1 = args0 ++ args
465 mb_env <- getGccEnv args1
466 runSomethingFiltered dflags id "Assembler" p args1 mb_env
468 runLink :: DynFlags -> [Option] -> IO ()
469 runLink dflags args = do
470 let (p,args0) = pgm_l dflags
471 args1 = args0 ++ args
472 mb_env <- getGccEnv args1
473 runSomethingFiltered dflags id "Linker" p args1 mb_env
475 runMkDLL :: DynFlags -> [Option] -> IO ()
476 runMkDLL dflags args = do
477 let (p,args0) = pgm_dll dflags
478 args1 = args0 ++ args
479 mb_env <- getGccEnv (args0++args)
480 runSomethingFiltered dflags id "Make DLL" p args1 mb_env
482 runWindres :: DynFlags -> [Option] -> IO ()
483 runWindres dflags args = do
484 let (gcc,gcc_args) = pgm_c dflags
485 windres = pgm_windres dflags
486 mb_env <- getGccEnv gcc_args
487 runSomethingFiltered dflags id "Windres" windres
488 -- we must tell windres where to find gcc: it might not be on PATH
489 (Option ("--preprocessor=" ++
490 unwords (map quote (gcc : map showOpt gcc_args ++
491 ["-E", "-xc", "-DRC_INVOKED"])))
492 -- -- use-temp-file is required for windres to interpret the
493 -- quoting in the preprocessor arg above correctly. Without
494 -- this, windres calls the preprocessor with popen, which gets
495 -- the quoting wrong (discovered by experimentation and
496 -- reading the windres sources). See #1828.
497 : Option "--use-temp-file"
499 -- we must use the PATH workaround here too, since windres invokes gcc
502 quote x = '\"' : x ++ "\""
504 touch :: DynFlags -> String -> String -> IO ()
505 touch dflags purpose arg =
506 runSomething dflags purpose (pgm_T dflags) [FileOption "" arg]
508 copy :: DynFlags -> String -> FilePath -> FilePath -> IO ()
509 copy dflags purpose from to = copyWithHeader dflags purpose Nothing from to
511 copyWithHeader :: DynFlags -> String -> Maybe String -> FilePath -> FilePath
513 copyWithHeader dflags purpose maybe_header from to = do
514 showPass dflags purpose
516 h <- openFile to WriteMode
517 ls <- readFile from -- inefficient, but it'll do for now.
518 -- ToDo: speed up via slurping.
519 maybe (return ()) (hPutStr h) maybe_header
523 getExtraViaCOpts :: DynFlags -> IO [String]
524 getExtraViaCOpts dflags = do
525 f <- readFile (topDir dflags </> "extra-gcc-opts")
529 %************************************************************************
531 \subsection{Managing temporary files
533 %************************************************************************
536 GLOBAL_VAR(v_FilesToClean, [], [String] )
537 GLOBAL_VAR(v_DirsToClean, emptyFM, FiniteMap FilePath FilePath )
541 cleanTempDirs :: DynFlags -> IO ()
543 = unless (dopt Opt_KeepTmpFiles dflags)
544 $ do ds <- readIORef v_DirsToClean
545 removeTmpDirs dflags (eltsFM ds)
546 writeIORef v_DirsToClean emptyFM
548 cleanTempFiles :: DynFlags -> IO ()
549 cleanTempFiles dflags
550 = unless (dopt Opt_KeepTmpFiles dflags)
551 $ do fs <- readIORef v_FilesToClean
552 removeTmpFiles dflags fs
553 writeIORef v_FilesToClean []
555 cleanTempFilesExcept :: DynFlags -> [FilePath] -> IO ()
556 cleanTempFilesExcept dflags dont_delete
557 = unless (dopt Opt_KeepTmpFiles dflags)
558 $ do files <- readIORef v_FilesToClean
559 let (to_keep, to_delete) = partition (`elem` dont_delete) files
560 removeTmpFiles dflags to_delete
561 writeIORef v_FilesToClean to_keep
564 -- find a temporary name that doesn't already exist.
565 newTempName :: DynFlags -> Suffix -> IO FilePath
566 newTempName dflags extn
567 = do d <- getTempDir dflags
569 findTempName (d ++ "/ghc" ++ show x ++ "_") 0
571 findTempName :: FilePath -> Integer -> IO FilePath
572 findTempName prefix x
573 = do let filename = (prefix ++ show x) <.> extn
574 b <- doesFileExist filename
575 if b then findTempName prefix (x+1)
576 else do consIORef v_FilesToClean filename -- clean it up later
579 -- return our temporary directory within tmp_dir, creating one if we
580 -- don't have one yet
581 getTempDir :: DynFlags -> IO FilePath
582 getTempDir dflags@(DynFlags{tmpDir=tmp_dir})
583 = do mapping <- readIORef v_DirsToClean
584 case lookupFM mapping tmp_dir of
587 let prefix = tmp_dir ++ "/ghc" ++ show x ++ "_"
589 mkTempDir :: Integer -> IO FilePath
591 = let dirname = prefix ++ show x
592 in do createDirectory dirname
593 let mapping' = addToFM mapping tmp_dir dirname
594 writeIORef v_DirsToClean mapping'
595 debugTraceMsg dflags 2 (ptext (sLit "Created temporary directory:") <+> text dirname)
598 if isAlreadyExistsError e
604 addFilesToClean :: [FilePath] -> IO ()
605 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
606 addFilesToClean files = mapM_ (consIORef v_FilesToClean) files
608 removeTmpDirs :: DynFlags -> [FilePath] -> IO ()
609 removeTmpDirs dflags ds
610 = traceCmd dflags "Deleting temp dirs"
611 ("Deleting: " ++ unwords ds)
612 (mapM_ (removeWith dflags removeDirectory) ds)
614 removeTmpFiles :: DynFlags -> [FilePath] -> IO ()
615 removeTmpFiles dflags fs
617 traceCmd dflags "Deleting temp files"
618 ("Deleting: " ++ unwords deletees)
619 (mapM_ (removeWith dflags removeFile) deletees)
621 -- Flat out refuse to delete files that are likely to be source input
622 -- files (is there a worse bug than having a compiler delete your source
625 -- Deleting source files is a sign of a bug elsewhere, so prominently flag
628 | null non_deletees = act
630 putMsg dflags (text "WARNING - NOT deleting source files:" <+> hsep (map text non_deletees))
633 (non_deletees, deletees) = partition isHaskellUserSrcFilename fs
635 removeWith :: DynFlags -> (FilePath -> IO ()) -> FilePath -> IO ()
636 removeWith dflags remover f = remover f `IO.catch`
638 let msg = if isDoesNotExistError e
639 then ptext (sLit "Warning: deleting non-existent") <+> text f
640 else ptext (sLit "Warning: exception raised when deleting")
643 in debugTraceMsg dflags 2 msg
646 -----------------------------------------------------------------------------
647 -- Running an external program
649 runSomething :: DynFlags
650 -> String -- For -v message
651 -> String -- Command name (possibly a full path)
652 -- assumed already dos-ified
653 -> [Option] -- Arguments
654 -- runSomething will dos-ify them
657 runSomething dflags phase_name pgm args =
658 runSomethingFiltered dflags id phase_name pgm args Nothing
661 :: DynFlags -> (String->String) -> String -> String -> [Option]
662 -> Maybe [(String,String)] -> IO ()
664 runSomethingFiltered dflags filter_fn phase_name pgm args mb_env = do
665 let real_args = filter notNull (map showOpt args)
666 traceCmd dflags phase_name (unwords (pgm:real_args)) $ do
667 (exit_code, doesn'tExist) <-
669 rc <- builderMainLoop dflags filter_fn pgm real_args mb_env
671 ExitSuccess{} -> return (rc, False)
673 -- rawSystem returns (ExitFailure 127) if the exec failed for any
674 -- reason (eg. the program doesn't exist). This is the only clue
675 -- we have, but we need to report something to the user because in
676 -- the case of a missing program there will otherwise be no output
678 | n == 127 -> return (rc, True)
679 | otherwise -> return (rc, False))
680 -- Should 'rawSystem' generate an IO exception indicating that
681 -- 'pgm' couldn't be run rather than a funky return code, catch
682 -- this here (the win32 version does this, but it doesn't hurt
683 -- to test for this in general.)
685 if IO.isDoesNotExistError err
686 #if defined(mingw32_HOST_OS) && __GLASGOW_HASKELL__ < 604
687 -- the 'compat' version of rawSystem under mingw32 always
688 -- maps 'errno' to EINVAL to failure.
689 || case (ioeGetErrorType err ) of { InvalidArgument{} -> True ; _ -> False}
691 then return (ExitFailure 1, True)
693 case (doesn'tExist, exit_code) of
694 (True, _) -> throwDyn (InstallationError ("could not execute: " ++ pgm))
695 (_, ExitSuccess) -> return ()
696 _ -> throwDyn (PhaseFailed phase_name exit_code)
698 builderMainLoop :: DynFlags -> (String -> String) -> FilePath
699 -> [String] -> Maybe [(String, String)]
701 #if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ < 603
702 builderMainLoop dflags filter_fn pgm real_args mb_env = do
703 rawSystem pgm real_args
705 builderMainLoop dflags filter_fn pgm real_args mb_env = do
707 (hStdIn, hStdOut, hStdErr, hProcess) <- runInteractiveProcess pgm real_args Nothing mb_env
709 -- and run a loop piping the output from the compiler to the log_action in DynFlags
710 hSetBuffering hStdOut LineBuffering
711 hSetBuffering hStdErr LineBuffering
712 forkIO (readerProc chan hStdOut filter_fn)
713 forkIO (readerProc chan hStdErr filter_fn)
714 -- we don't want to finish until 2 streams have been completed
715 -- (stdout and stderr)
716 -- nor until 1 exit code has been retrieved.
717 rc <- loop chan hProcess (2::Integer) (1::Integer) ExitSuccess
718 -- after that, we're done here.
724 -- status starts at zero, and increments each time either
725 -- a reader process gets EOF, or the build proc exits. We wait
726 -- for all of these to happen (status==3).
727 -- ToDo: we should really have a contingency plan in case any of
728 -- the threads dies, such as a timeout.
729 loop _ _ 0 0 exitcode = return exitcode
730 loop chan hProcess t p exitcode = do
732 then getProcessExitCode hProcess
735 Just code -> loop chan hProcess t (p-1) code
741 log_action dflags SevInfo noSrcSpan defaultUserStyle msg
742 loop chan hProcess t p exitcode
743 BuildError loc msg -> do
744 log_action dflags SevError (mkSrcSpan loc loc) defaultUserStyle msg
745 loop chan hProcess t p exitcode
747 loop chan hProcess (t-1) p exitcode
748 | otherwise -> loop chan hProcess t p exitcode
750 readerProc :: Chan BuildMessage -> Handle -> (String -> String) -> IO ()
751 readerProc chan hdl filter_fn =
752 (do str <- hGetContents hdl
753 loop (linesPlatform (filter_fn str)) Nothing)
756 -- ToDo: check errors more carefully
757 -- ToDo: in the future, the filter should be implemented as
758 -- a stream transformer.
760 loop [] Nothing = return ()
761 loop [] (Just err) = writeChan chan err
764 Just err@(BuildError srcLoc msg)
765 | leading_whitespace l -> do
766 loop ls (Just (BuildError srcLoc (msg $$ text l)))
772 _ -> panic "readerProc/loop"
775 = case parseError l of
777 writeChan chan (BuildMsg (text l))
779 Just (file, lineNum, colNum, msg) -> do
780 let srcLoc = mkSrcLoc (mkFastString file) lineNum colNum
781 loop ls (Just (BuildError srcLoc (text msg)))
783 leading_whitespace [] = False
784 leading_whitespace (x:_) = isSpace x
786 parseError :: String -> Maybe (String, Int, Int, String)
787 parseError s0 = case breakColon s0 of
788 Just (filename, s1) ->
789 case breakIntColon s1 of
790 Just (lineNum, s2) ->
791 case breakIntColon s2 of
792 Just (columnNum, s3) ->
793 Just (filename, lineNum, columnNum, s3)
795 Just (filename, lineNum, 0, s2)
799 breakColon :: String -> Maybe (String, String)
800 breakColon xs = case break (':' ==) xs of
801 (ys, _:zs) -> Just (ys, zs)
804 breakIntColon :: String -> Maybe (Int, String)
805 breakIntColon xs = case break (':' ==) xs of
807 | not (null ys) && all isAscii ys && all isDigit ys ->
813 | BuildError !SrcLoc !SDoc
817 showOpt :: Option -> String
818 showOpt (FileOption pre f) = pre ++ f
819 showOpt (Option s) = s
821 traceCmd :: DynFlags -> String -> String -> IO () -> IO ()
822 -- a) trace the command (at two levels of verbosity)
823 -- b) don't do it at all if dry-run is set
824 traceCmd dflags phase_name cmd_line action
825 = do { let verb = verbosity dflags
826 ; showPass dflags phase_name
827 ; debugTraceMsg dflags 3 (text cmd_line)
831 ; unless (dopt Opt_DryRun dflags) $ do {
834 ; action `IO.catch` handle_exn verb
837 handle_exn _verb exn = do { debugTraceMsg dflags 2 (char '\n')
838 ; debugTraceMsg dflags 2 (ptext (sLit "Failed:") <+> text cmd_line <+> text (show exn))
839 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
842 %************************************************************************
844 \subsection{Support code}
846 %************************************************************************
849 -----------------------------------------------------------------------------
850 -- Define getBaseDir :: IO (Maybe String)
852 getBaseDir :: IO (Maybe String)
853 #if defined(mingw32_HOST_OS)
854 -- Assuming we are running ghc, accessed by path $()/bin/ghc.exe,
855 -- return the path $(stuff). Note that we drop the "bin/" directory too.
856 getBaseDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
857 buf <- mallocArray len
858 ret <- getModuleFileName nullPtr buf len
859 if ret == 0 then free buf >> return Nothing
860 else do s <- peekCString buf
862 return (Just (rootDir s))
864 rootDir s = case splitFileName $ normalise s of
866 case splitFileName $ takeDirectory d of
867 (d', "bin") -> takeDirectory d'
868 _ -> panic ("Expected \"bin\" in " ++ show s)
869 _ -> panic ("Expected \"ghc.exe\" in " ++ show s)
871 foreign import stdcall unsafe "GetModuleFileNameA"
872 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
874 getBaseDir = return Nothing
877 #ifdef mingw32_HOST_OS
878 foreign import ccall unsafe "_getpid" getProcessID :: IO Int -- relies on Int == Int32 on Windows
880 getProcessID :: IO Int
881 getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral
884 -- Divvy up text stream into lines, taking platform dependent
885 -- line termination into account.
886 linesPlatform :: String -> [String]
887 #if !defined(mingw32_HOST_OS)
888 linesPlatform ls = lines ls
890 linesPlatform "" = []
893 (as,xs1) -> as : linesPlatform xs1
895 lineBreak "" = ("","")
896 lineBreak ('\r':'\n':xs) = ([],xs)
897 lineBreak ('\n':xs) = ([],xs)
898 lineBreak (x:xs) = let (as,bs) = lineBreak xs in (x:as,bs)