1 /* -----------------------------------------------------------------------------
2 * $Id: RtsStartup.c,v 1.8 1999/03/03 19:10:37 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"
33 #ifndef aix_TARGET_OS /* AIX gives link errors with this as a const (RO assembler section) */
36 StgClosure *PrelBase_Bool_closure_tbl[] = {
37 #ifndef HAVE_WIN32_DLL_SUPPORT
49 struct RTS_FLAGS RtsFlags;
51 extern void startupHaskell(int argc, char *argv[])
53 static int rts_has_started_up = 0;
56 /* To avoid repeated initialisations of the RTS */
57 if (rts_has_started_up)
63 int nPEs = 0; /* Number of PEs */
66 /* The very first thing we do is grab the start time...just in case we're
67 * collecting timing statistics.
73 *The parallel system needs to be initialised and synchronised before
76 if (*argv[0] == '-') { /* Look to see whether we're the Main Thread */
77 IAmMainThread = rtsTrue;
78 argv++; argc--; /* Strip off flag argument */
79 /* fprintf(stderr, "I am Main Thread\n"); */
82 * Grab the number of PEs out of the argument vector, and
83 * eliminate it from further argument processing.
88 initEachPEHook(); /* HWL: hook to be execed on each PE */
92 /* Set the RTS flags to default values. */
93 initRtsFlagsDefaults();
95 /* Call the user hook to reset defaults, if present */
98 /* Parse the flags, separating the RTS flags from the programs args */
99 setupRtsFlags(&argc, argv, &rts_argc, rts_argv);
104 /* Initialise the parallel system -- before initHeap! */
105 initParallelSystem();
106 /* And start GranSim profiling if required: omitted for now
107 *if (Rtsflags.ParFlags.granSimStats)
108 *init_gr_profiling(rts_argc, rts_argv, prog_argc, prog_argv);
112 /* initialize the storage manager */
115 /* initialise the stable pointer table */
116 initStablePtrTable();
118 #if defined(PROFILING) || defined(DEBUG)
122 /* Initialise the scheduler */
125 /* Initialise the stats department */
132 /* When the RTS and Prelude live in separate DLLs,
133 we need to patch up the char- and int-like tables
134 that the RTS keep after both DLLs have been loaded,
135 filling in the tables with references to where the
136 static info tables have been loaded inside the running
139 Ditto for Bool closure tbl.
141 #ifdef HAVE_WIN32_DLL_SUPPORT
143 (CHARLIKE_closure[i]).header.info = (const StgInfoTable*)&Czh_static_info;
146 (INTLIKE_closure[i]).header.info = (const StgInfoTable*)&Izh_static_info;
148 PrelBase_Bool_closure_tbl[0] = (const StgClosure*)&False_closure;
149 PrelBase_Bool_closure_tbl[1] = (const StgClosure*)&True_closure;
151 /* Record initialization times */
156 shutdownHaskell(void)
158 /* Finalize any remaining weak pointers */
159 finalizeWeakPointersNow();
163 if (!RTSflags.GranFlags.granSimStats_suppressed)
167 /* clean up things from the storage manager's point of view */
170 #if defined(PROFILING) || defined(DEBUG)
174 #if defined(PROFILING)
175 report_ccs_profiling( );
178 #if defined(TICKY_TICKY)
179 if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo();
183 This fflush is important, because: if "main" just returns,
184 then we will end up in pre-supplied exit code that will close
185 streams and flush buffers. In particular we have seen: it
186 will close fd 0 (stdin), then flush fd 1 (stdout), then <who
189 But if you're playing with sockets, that "close fd 0" might
190 suggest to the daemon that all is over, only to be presented
191 with more stuff on "fd 1" at the flush.
193 The fflush avoids this sad possibility.
200 * called from STG-land to exit the program cleanly