/* -----------------------------------------------------------------------------
- * $Id: RtsStartup.c,v 1.54 2001/10/31 10:34:29 simonmar Exp $
*
- * (c) The GHC Team, 1998-2000
+ * (c) The GHC Team, 1998-2002
*
* Main function for a standalone Haskell program.
*
#include "RtsAPI.h"
#include "RtsUtils.h"
#include "RtsFlags.h"
+#include "OSThreads.h"
#include "Storage.h" /* initStorage, exitStorage */
-#include "StablePriv.h" /* initStablePtrTable */
#include "Schedule.h" /* initScheduler */
#include "Stats.h" /* initStats */
+#include "STM.h" /* initSTM */
#include "Signals.h"
-#include "Itimer.h"
+#include "RtsSignals.h"
+#include "Timer.h" /* startTimer, stopTimer */
#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"
+#include "BlockAlloc.h"
#if defined(RTS_GTK_FRONTPANEL)
#include "FrontPanel.h"
#if defined(PROFILING) || defined(DEBUG)
# include "Profiling.h"
# include "ProfHeap.h"
+# include "RetainerProfile.h"
#endif
#if defined(GRAN)
# include "LLC.h"
#endif
-/*
- * Flag Structure
- */
-struct RTS_FLAGS RtsFlags;
+#if defined(mingw32_HOST_OS)
+#include "win32/AsyncIO.h"
+#endif
-static int rts_has_started_up = 0;
-#if defined(PAR)
-ullong startTime = 0;
+#include <stdlib.h>
+
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
#endif
-EXTFUN(__stginit_Prelude);
-static void initModules ( void (*)(void) );
+// Count of how many outstanding hs_init()s there have been.
+static int hs_init_count = 0;
-void
-setProgArgv(int argc, char *argv[])
+// Here we save the terminal settings on the standard file
+// descriptors, if we need to change them (eg. to support NoBuffering
+// input).
+static void *saved_termios[3] = {NULL,NULL,NULL};
+
+void*
+__hscore_get_saved_termios(int fd)
{
- /* 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;
+ return (0 <= fd && fd < (int)(sizeof(saved_termios) / sizeof(*saved_termios))) ?
+ saved_termios[fd] : NULL;
}
void
-getProgArgv(int *argc, char **argv[])
+__hscore_set_saved_termios(int fd, void* ts)
{
- *argc = prog_argc;
- *argv = prog_argv;
+ if (0 <= fd && fd < (int)(sizeof(saved_termios) / sizeof(*saved_termios))) {
+ saved_termios[fd] = ts;
+ }
}
+/* -----------------------------------------------------------------------------
+ Initialise floating point unit on x86 (currently disabled. why?)
+ (see comment in ghc/compiler/nativeGen/MachInstrs.lhs).
+ -------------------------------------------------------------------------- */
+
+#define X86_INIT_FPU 0
+
+#if X86_INIT_FPU
+static void
+x86_init_fpu ( void )
+{
+ __volatile unsigned short int fpu_cw;
+
+ // Grab the control word
+ __asm __volatile ("fnstcw %0" : "=m" (fpu_cw));
+
+#if 0
+ printf("fpu_cw: %x\n", fpu_cw);
+#endif
+
+ // Set bits 8-9 to 10 (64-bit precision).
+ fpu_cw = (fpu_cw & 0xfcff) | 0x0200;
+
+ // Store the new control word back
+ __asm __volatile ("fldcw %0" : : "m" (fpu_cw));
+}
+#endif
+
+/* -----------------------------------------------------------------------------
+ Starting up the RTS
+ -------------------------------------------------------------------------- */
void
-startupHaskell(int argc, char *argv[], void (*init_root)(void))
+hs_init(int *argc, char **argv[])
{
- /* To avoid repeated initialisations of the RTS */
- if (rts_has_started_up)
- return;
- else
- rts_has_started_up=1;
+ hs_init_count++;
+ if (hs_init_count > 1) {
+ // second and subsequent inits are ignored
+ return;
+ }
/* The very first thing we do is grab the start time...just in case we're
* collecting timing statistics.
defaultsHook();
/* Parse the flags, separating the RTS flags from the programs args */
- setupRtsFlags(&argc, argv, &rts_argc, rts_argv);
- prog_argc = argc;
- prog_argv = argv;
+ if (argc != NULL && argv != NULL) {
+ setupRtsFlags(argc, *argv, &rts_argc, rts_argv);
+ setProgArgv(*argc,*argv);
+ }
#if defined(PAR)
/* NB: this really must be done after processing the RTS flags */
IF_PAR_DEBUG(verbose,
- fprintf(stderr, "==== Synchronising system (%d PEs)\n", nPEs));
+ debugBelch("==== Synchronising system (%d PEs)\n", nPEs));
synchroniseSystem(); // calls initParallelSystem etc
#endif /* PAR */
+ /* Perform initialisation of adjustor thunk layer. */
+ initAdjustor();
+
/* initialise scheduler data structures (needs to be done before
* initStorage()).
*/
/* initialise the stable pointer table */
initStablePtrTable();
-#if defined(PROFILING) || defined(DEBUG)
- initProfiling1();
+#if defined(DEBUG)
+ /* initialise thread label table (tso->char*) */
+ initThreadLabelTable();
#endif
- /* run the per-module initialisation code */
- initModules(init_root);
-
#if defined(PROFILING) || defined(DEBUG)
- initProfiling2();
+ initProfiling1();
#endif
- /* start the ticker */
- install_vtalrm_handler();
- initialize_virtual_timer(TICK_MILLISECS);
-
- /* start our haskell execution tasks */
-#ifdef SMP
- startTasks();
-#endif
+ /* start the virtual timer 'subsystem'. */
+ startTimer(TICK_MILLISECS);
/* Initialise the stats department */
initStats();
-#if !defined(mingw32_TARGET_OS) && !defined(PAR)
+#if defined(RTS_USER_SIGNALS)
/* Initialise the user signal handler set */
initUserSignals();
/* Set up handler to run on SIGINT, etc. */
initDefaultHandlers();
#endif
+#if defined(mingw32_HOST_OS)
+ startupAsyncIO();
+#endif
+
#ifdef RTS_GTK_FRONTPANEL
if (RtsFlags.GcFlags.frontpanel) {
initFrontPanel();
}
#endif
+#if X86_INIT_FPU
+ x86_init_fpu();
+#endif
+
/* Record initialization times */
stat_endInit();
}
+// Compatibility interface
+void
+startupHaskell(int argc, char *argv[], void (*init_root)(void))
+{
+ hs_init(&argc, &argv);
+ if(init_root)
+ hs_add_root(init_root);
+}
+
+
/* -----------------------------------------------------------------------------
Per-module initialisation
The code generator inserts a small function "__stginit_<module>" 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).
+ imports.
The init* functions are compiled in the same way as STG code,
i.e. without normal C call/return conventions. Hence we must use
/* The init functions use an explicit stack...
*/
-#define INIT_STACK_SIZE (BLOCK_SIZE * 4)
-F_ *init_stack = NULL;
-nat init_sp = 0;
+#define INIT_STACK_BLOCKS 4
+static F_ *init_stack = NULL;
-static void
-initModules ( void (*init_root)(void) )
+void
+hs_add_root(void (*init_root)(void))
{
-#ifdef SMP
- Capability cap;
-#else
-#define cap MainRegTable
-#endif
+ bdescr *bd;
+ nat init_sp;
+ Capability *cap = &MainCapability;
- init_sp = 0;
- init_stack = (F_ *)allocate(INIT_STACK_SIZE / sizeof(W_));
- init_stack[init_sp++] = (F_)stg_init_ret;
- init_stack[init_sp++] = (F_)__stginit_Prelude;
+ if (hs_init_count <= 0) {
+ barf("hs_add_root() must be called after hs_init()");
+ }
+
+ /* The initialisation stack grows downward, with sp pointing
+ to the last occupied word */
+ init_sp = INIT_STACK_BLOCKS*BLOCK_SIZE_W;
+ bd = allocGroup_lock(INIT_STACK_BLOCKS);
+ init_stack = (F_ *)bd->start;
+ init_stack[--init_sp] = (F_)stg_init_finish;
if (init_root != NULL) {
- init_stack[init_sp++] = (F_)init_root;
+ init_stack[--init_sp] = (F_)init_root;
}
- cap.rSp = (P_)(init_stack + init_sp);
- StgRun((StgFunPtr)stg_init, &cap);
-}
+ cap->r.rSp = (P_)(init_stack + init_sp);
+ StgRun((StgFunPtr)stg_init, &cap->r);
-/* -----------------------------------------------------------------------------
- * 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);
+ freeGroup_lock(bd);
+
+#if defined(PROFILING) || defined(DEBUG)
+ // This must be done after module initialisation.
+ // ToDo: make this work in the presence of multiple hs_add_root()s.
+ initProfiling2();
#endif
}
+/* -----------------------------------------------------------------------------
+ Shutting down the RTS
+ -------------------------------------------------------------------------- */
+
void
-shutdownHaskell(void)
+hs_exit(void)
{
- if (!rts_has_started_up)
- return;
-
- /* start timing the shutdown */
- stat_startExit();
-
-#if !defined(GRAN)
- /* Finalize any remaining weak pointers */
- finalizeWeakPointersNow();
-#endif
+ if (hs_init_count <= 0) {
+ errorBelch("warning: too many hs_exit()s");
+ return;
+ }
+ hs_init_count--;
+ if (hs_init_count > 0) {
+ // ignore until it's the last one
+ return;
+ }
+ /* start timing the shutdown */
+ stat_startExit();
+
+ /* stop all running tasks */
+ exitScheduler();
+
#if defined(GRAN)
- /* end_gr_simulation prints global stats if requested -- HWL */
- if (!RtsFlags.GranFlags.GranSimStats.Suppressed)
- end_gr_simulation();
+ /* end_gr_simulation prints global stats if requested -- HWL */
+ if (!RtsFlags.GranFlags.GranSimStats.Suppressed)
+ end_gr_simulation();
+#endif
+
+ /* stop the ticker */
+ stopTimer();
+
+ /* reset the standard file descriptors to blocking mode */
+ resetNonBlockingFd(0);
+ resetNonBlockingFd(1);
+ resetNonBlockingFd(2);
+
+#if HAVE_TERMIOS_H
+ // Reset the terminal settings on the standard file descriptors,
+ // if we changed them. See System.Posix.Internals.tcSetAttr for
+ // more details, including the reason we termporarily disable
+ // SIGTTOU here.
+ {
+ int fd;
+ sigset_t sigset, old_sigset;
+ sigemptyset(&sigset);
+ sigaddset(&sigset, SIGTTOU);
+ sigprocmask(SIG_BLOCK, &sigset, &old_sigset);
+ for (fd = 0; fd <= 2; fd++) {
+ struct termios* ts = (struct termios*)__hscore_get_saved_termios(fd);
+ if (ts != NULL) {
+ tcsetattr(fd,TCSANOW,ts);
+ }
+ }
+ sigprocmask(SIG_SETMASK, &old_sigset, NULL);
+ }
#endif
-
- /* stop all running tasks */
- exitScheduler();
-
- /* stop the ticker */
- initialize_virtual_timer(0);
-
- /* 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();
+ /* 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();
-
+ /* 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();
+ 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();
+ if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo();
+#endif
+
+#if defined(mingw32_HOST_OS)
+ shutdownAsyncIO();
#endif
- rts_has_started_up=0;
+ // Finally, free all our storage.
+ freeStorage();
+}
+
+// Compatibility interfaces
+void
+shutdownHaskell(void)
+{
+ hs_exit();
+}
+
+void
+shutdownHaskellAndExit(int n)
+{
+ if (hs_init_count == 1) {
+ OnExitHook();
+ hs_exit();
+#if defined(PAR)
+ /* really exit (stg_exit() would call shutdownParallelSystem() again) */
+ exit(n);
+#else
+ stg_exit(n);
+#endif
+ }
}
/*
#endif
void
-stg_exit(I_ n)
+stg_exit(int n)
{
#ifdef PAR
/* HACK: avoid a loop when exiting due to a stupid error */
return;
exit_started=rtsTrue;
- IF_PAR_DEBUG(verbose, fprintf(stderr,"==-- stg_exit %d on [%x]...", n, mytid));
+ IF_PAR_DEBUG(verbose, debugBelch("==-- stg_exit %d on [%x]...", n, mytid));
shutdownParallelSystem(n);
#endif
exit(n);
}
-
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