1 /* -----------------------------------------------------------------------------
2 * $Id: RtsStartup.c,v 1.12 1999/05/10 08:23:56 sof Exp $
4 * (c) The GHC Team, 1998-1999
6 * Main function for a standalone Haskell program.
8 * ---------------------------------------------------------------------------*/
14 #include "Storage.h" /* initStorage, exitStorage */
15 #include "StablePriv.h" /* initStablePtrTable */
16 #include "Schedule.h" /* initScheduler */
17 #include "Stats.h" /* initStats */
21 #if defined(PROFILING)
24 # include "DebugProf.h"
36 struct RTS_FLAGS RtsFlags;
39 startupHaskell(int argc, char *argv[])
41 static int rts_has_started_up = 0;
44 /* To avoid repeated initialisations of the RTS */
45 if (rts_has_started_up)
51 int nPEs = 0; /* Number of PEs */
54 /* The very first thing we do is grab the start time...just in case we're
55 * collecting timing statistics.
61 *The parallel system needs to be initialised and synchronised before
64 if (*argv[0] == '-') { /* Look to see whether we're the Main Thread */
65 IAmMainThread = rtsTrue;
66 argv++; argc--; /* Strip off flag argument */
67 /* fprintf(stderr, "I am Main Thread\n"); */
70 * Grab the number of PEs out of the argument vector, and
71 * eliminate it from further argument processing.
76 initEachPEHook(); /* HWL: hook to be execed on each PE */
80 /* Set the RTS flags to default values. */
81 initRtsFlagsDefaults();
83 /* Call the user hook to reset defaults, if present */
86 /* Parse the flags, separating the RTS flags from the programs args */
87 setupRtsFlags(&argc, argv, &rts_argc, rts_argv);
92 /* Initialise the parallel system -- before initHeap! */
94 /* And start GranSim profiling if required: omitted for now
95 *if (Rtsflags.ParFlags.granSimStats)
96 *init_gr_profiling(rts_argc, rts_argv, prog_argc, prog_argv);
100 /* initialize the storage manager */
103 /* initialise the stable pointer table */
104 initStablePtrTable();
106 #if defined(PROFILING) || defined(DEBUG)
110 /* Initialise the scheduler */
113 /* Initialise the stats department */
120 /* When the RTS and Prelude live in separate DLLs,
121 we need to patch up the char- and int-like tables
122 that the RTS keep after both DLLs have been loaded,
123 filling in the tables with references to where the
124 static info tables have been loaded inside the running
127 #ifdef ENABLE_WIN32_DLL_SUPPORT
129 (CHARLIKE_closure[i]).header.info = (const StgInfoTable*)&Czh_static_info;
132 (INTLIKE_closure[i]).header.info = (const StgInfoTable*)&Izh_static_info;
135 /* Record initialization times */
140 shutdownHaskell(void)
142 /* Finalize any remaining weak pointers */
143 finalizeWeakPointersNow();
147 if (!RTSflags.GranFlags.granSimStats_suppressed)
151 /* clean up things from the storage manager's point of view */
154 #if defined(PROFILING) || defined(DEBUG)
158 #if defined(PROFILING)
159 report_ccs_profiling( );
162 #if defined(TICKY_TICKY)
163 if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo();
167 This fflush is important, because: if "main" just returns,
168 then we will end up in pre-supplied exit code that will close
169 streams and flush buffers. In particular we have seen: it
170 will close fd 0 (stdin), then flush fd 1 (stdout), then <who
173 But if you're playing with sockets, that "close fd 0" might
174 suggest to the daemon that all is over, only to be presented
175 with more stuff on "fd 1" at the flush.
177 The fflush avoids this sad possibility.
184 * called from STG-land to exit the program cleanly