X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FRtsStartup.c;h=2a288b7d009777fbea62b2bc35da6200a42e54f2;hb=fa9c9782a4e66d7af52f4e1ef8ddf2445741dd44;hp=bd09db75806ed9cd9e72b8cda35500b164a543e9;hpb=63015c7f7264be54d527e309de2647fa41f3f4c6;p=ghc-hetmet.git diff --git a/ghc/rts/RtsStartup.c b/ghc/rts/RtsStartup.c index bd09db7..2a288b7 100644 --- a/ghc/rts/RtsStartup.c +++ b/ghc/rts/RtsStartup.c @@ -1,12 +1,13 @@ /* ----------------------------------------------------------------------------- - * $Id: RtsStartup.c,v 1.7 1999/02/11 17:40:27 simonm Exp $ + * $Id: RtsStartup.c,v 1.66 2002/08/16 13:29:06 simonmar Exp $ * - * (c) The GHC Team, 1998-1999 + * (c) The GHC Team, 1998-2000 * * Main function for a standalone Haskell program. * * ---------------------------------------------------------------------------*/ +#include "PosixSource.h" #include "Rts.h" #include "RtsAPI.h" #include "RtsUtils.h" @@ -15,56 +16,108 @@ #include "StablePriv.h" /* initStablePtrTable */ #include "Schedule.h" /* initScheduler */ #include "Stats.h" /* initStats */ +#include "Signals.h" +#include "Itimer.h" #include "Weak.h" #include "Ticky.h" +#include "StgRun.h" +#include "StgStartup.h" +#include "Prelude.h" /* fixupRTStoPreludeRefs */ +#include "HsFFI.h" +#include "Linker.h" +#include "ThreadLabels.h" -#if defined(PROFILING) -# include "ProfRts.h" -#elif defined(DEBUG) -# include "DebugProf.h" +#if defined(RTS_GTK_FRONTPANEL) +#include "FrontPanel.h" #endif -#ifdef PAR -#include "ParInit.h" -#include "Parallel.h" -#include "LLC.h" +#if defined(PROFILING) || defined(DEBUG) +# include "Profiling.h" +# include "ProfHeap.h" +# include "RetainerProfile.h" +#endif + +#if defined(GRAN) +# include "GranSimRts.h" +#endif + +#if defined(GRAN) || defined(PAR) +# include "ParallelRts.h" #endif +#if defined(PAR) +# include "Parallel.h" +# include "LLC.h" +#endif + +#include + /* * Flag Structure */ struct RTS_FLAGS RtsFlags; -extern void startupHaskell(int argc, char *argv[]) -{ +static int rts_has_started_up = 0; #if defined(PAR) - int nPEs = 0; /* Number of PEs */ +ullong startTime = 0; #endif +EXTFUN(__stginit_Prelude); +static void initModules ( void (*)(void) ); + +void +setProgArgv(int argc, char *argv[]) +{ + /* Usually this is done by startupHaskell, so we don't need to call this. + However, sometimes Hugs wants to change the arguments which Haskell + getArgs >>= ... will be fed. So you can do that by calling here + _after_ calling startupHaskell. + */ + prog_argc = argc; + prog_argv = argv; +} + +void +getProgArgv(int *argc, char **argv[]) +{ + *argc = prog_argc; + *argv = prog_argv; +} + + +void +startupHaskell(int argc, char *argv[], void (*init_root)(void)) +{ + /* To avoid repeated initialisations of the RTS */ + if (rts_has_started_up) { + /* RTS is up and running, so only run the per-module initialisation code */ + if (init_root) { + initModules(init_root); + } + return; + } else { + rts_has_started_up=1; + } + /* The very first thing we do is grab the start time...just in case we're * collecting timing statistics. */ - start_time(); + stat_startInit(); #ifdef PAR -/* - *The parallel system needs to be initialised and synchronised before - *the program is run. - */ - if (*argv[0] == '-') { /* Look to see whether we're the Main Thread */ - IAmMainThread = rtsTrue; - argv++; argc--; /* Strip off flag argument */ -/* fprintf(stderr, "I am Main Thread\n"); */ + /* + * The parallel system needs to be initialised and synchronised before + * the program is run. + */ + startupParallelSystem(argv); + + if (*argv[0] == '-') { /* Strip off mainPE flag argument */ + argv++; + argc--; } - /* - * Grab the number of PEs out of the argument vector, and - * eliminate it from further argument processing. - */ - nPEs = atoi(argv[1]); - argv[1] = argv[0]; + + argv[1] = argv[0]; /* ignore the nPEs argument */ argv++; argc--; - initEachPEHook(); /* HWL: hook to be execed on each PE */ - SynchroniseSystem(); #endif /* Set the RTS flags to default values. */ @@ -79,93 +132,241 @@ extern void startupHaskell(int argc, char *argv[]) prog_argv = argv; #if defined(PAR) - /* Initialise the parallel system -- before initHeap! */ - initParallelSystem(); - /* And start GranSim profiling if required: omitted for now - *if (Rtsflags.ParFlags.granSimStats) - *init_gr_profiling(rts_argc, rts_argv, prog_argc, prog_argv); - */ + /* NB: this really must be done after processing the RTS flags */ + IF_PAR_DEBUG(verbose, + fprintf(stderr, "==== Synchronising system (%d PEs)\n", nPEs)); + synchroniseSystem(); // calls initParallelSystem etc #endif /* PAR */ + /* initialise scheduler data structures (needs to be done before + * initStorage()). + */ + initScheduler(); + +#if defined(GRAN) + /* And start GranSim profiling if required: */ + if (RtsFlags.GranFlags.GranSimStats.Full) + init_gr_simulation(rts_argc, rts_argv, prog_argc, prog_argv); +#elif defined(PAR) + /* And start GUM profiling if required: */ + if (RtsFlags.ParFlags.ParStats.Full) + init_gr_simulation(rts_argc, rts_argv, prog_argc, prog_argv); +#endif /* PAR || GRAN */ + /* initialize the storage manager */ initStorage(); /* initialise the stable pointer table */ initStablePtrTable(); + /* initialise thread label table (tso->char*) */ + initThreadLabelTable(); + #if defined(PROFILING) || defined(DEBUG) - initProfiling(); + initProfiling1(); #endif - /* Initialise the scheduler */ - initScheduler(); + /* run the per-module initialisation code */ + initModules(init_root); + +#if defined(PROFILING) || defined(DEBUG) + initProfiling2(); +#endif + + /* start the virtual timer 'subsystem'. */ + startVirtTimer(TICK_MILLISECS); /* Initialise the stats department */ initStats(); -#if 0 +#if !defined(mingw32_TARGET_OS) && !defined(PAR) + /* Initialise the user signal handler set */ initUserSignals(); + /* Set up handler to run on SIGINT, etc. */ + initDefaultHandlers(); +#endif + +#ifdef RTS_GTK_FRONTPANEL + if (RtsFlags.GcFlags.frontpanel) { + initFrontPanel(); + } #endif /* Record initialization times */ - end_init(); + stat_endInit(); +} + +/* ----------------------------------------------------------------------------- + Per-module initialisation + + This process traverses all the compiled modules in the program + starting with "Main", and performing per-module initialisation for + each one. + + So far, two things happen at initialisation time: + + - we register stable names for each foreign-exported function + in that module. This prevents foreign-exported entities, and + things they depend on, from being garbage collected. + + - we supply a unique integer to each statically declared cost + centre and cost centre stack in the program. + + The code generator inserts a small function "__stginit_" in each + module and calls the registration functions in each of the modules it + imports. So, if we call "__stginit_PrelMain", each reachable module in the + program will be registered (because PrelMain.mainIO calls Main.main). + + The init* functions are compiled in the same way as STG code, + i.e. without normal C call/return conventions. Hence we must use + StgRun to call this stuff. + -------------------------------------------------------------------------- */ + +/* The init functions use an explicit stack... + */ +#define INIT_STACK_BLOCKS 4 +F_ *init_stack = NULL; + +static void +initModules ( void (*init_root)(void) ) +{ + bdescr *bd; +#ifdef SMP + Capability cap; +#else +#define cap MainCapability +#endif + nat init_sp; + + init_sp = 0; + bd = allocGroup(INIT_STACK_BLOCKS); + init_stack = (F_ *)bd->start; + init_stack[init_sp++] = (F_)stg_init_ret; + init_stack[init_sp++] = (F_)__stginit_Prelude; + if (init_root != NULL) { + init_stack[init_sp++] = (F_)init_root; + } + + cap.r.rSp = (P_)(init_stack + init_sp); + StgRun((StgFunPtr)stg_init, &cap.r); + + freeGroup(bd); +} + +/* ----------------------------------------------------------------------------- + * Shutting down the RTS - two ways of doing this, one which + * calls exit(), one that doesn't. + * + * (shutdownHaskellAndExit() is called by System.exitWith). + * ----------------------------------------------------------------------------- + */ +void +shutdownHaskellAndExit(int n) +{ + OnExitHook(); + shutdownHaskell(); +#if defined(PAR) + /* really exit (stg_exit() would call shutdownParallelSystem() again) */ + exit(n); +#else + stg_exit(n); +#endif } void shutdownHaskell(void) { + if (!rts_has_started_up) + return; + rts_has_started_up=0; + + /* start timing the shutdown */ + stat_startExit(); + + /* stop all running tasks */ + exitScheduler(); + +#if !defined(GRAN) /* Finalize any remaining weak pointers */ finalizeWeakPointersNow(); +#endif #if defined(GRAN) - #error FixMe. - if (!RTSflags.GranFlags.granSimStats_suppressed) + /* end_gr_simulation prints global stats if requested -- HWL */ + if (!RtsFlags.GranFlags.GranSimStats.Suppressed) end_gr_simulation(); #endif - /* clean up things from the storage manager's point of view */ + /* stop the ticker */ + stopVirtTimer(); + + /* reset the standard file descriptors to blocking mode */ + resetNonBlockingFd(0); + resetNonBlockingFd(1); + resetNonBlockingFd(2); + +#if defined(PAR) + /* controlled exit; good thread! */ + shutdownParallelSystem(0); + + /* global statistics in parallel system */ + PAR_TICKY_PAR_END(); +#endif + + /* stop timing the shutdown, we're about to print stats */ + stat_endExit(); + + /* clean up things from the storage manager's point of view. + * also outputs the stats (+RTS -s) info. + */ exitStorage(); +#ifdef RTS_GTK_FRONTPANEL + if (RtsFlags.GcFlags.frontpanel) { + stopFrontPanel(); + } +#endif + +#if defined(PROFILING) + reportCCSProfiling(); +#endif + #if defined(PROFILING) || defined(DEBUG) endProfiling(); #endif -#if defined(PROFILING) - report_ccs_profiling( ); +#ifdef PROFILING + // Originally, this was in report_ccs_profiling(). Now, retainer + // profiling might tack some extra stuff on to the end of this file + // during endProfiling(). + fclose(prof_file); #endif #if defined(TICKY_TICKY) if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo(); #endif - - /* - This fflush is important, because: if "main" just returns, - then we will end up in pre-supplied exit code that will close - streams and flush buffers. In particular we have seen: it - will close fd 0 (stdin), then flush fd 1 (stdout), then ... - - But if you're playing with sockets, that "close fd 0" might - suggest to the daemon that all is over, only to be presented - with more stuff on "fd 1" at the flush. - - The fflush avoids this sad possibility. - */ - fflush(stdout); } - /* - * called from STG-land to exit the program cleanly + * called from STG-land to exit the program */ +#ifdef PAR +static int exit_started=rtsFalse; +#endif + void stg_exit(I_ n) -{ +{ #ifdef PAR - par_exit(n); -#else - OnExitHook(); - exit(n); + /* HACK: avoid a loop when exiting due to a stupid error */ + if (exit_started) + return; + exit_started=rtsTrue; + + IF_PAR_DEBUG(verbose, fprintf(stderr,"==-- stg_exit %d on [%x]...", n, mytid)); + shutdownParallelSystem(n); #endif + exit(n); } +