/* -----------------------------------------------------------------------------
- * $Id: RtsStartup.c,v 1.53 2001/09/04 18:29:21 ken Exp $
+ * $Id: RtsStartup.c,v 1.78 2003/09/26 12:12:35 panne Exp $
*
- * (c) The GHC Team, 1998-2000
+ * (c) The GHC Team, 1998-2002
*
* Main function for a standalone Haskell program.
*
#include "Schedule.h" /* initScheduler */
#include "Stats.h" /* initStats */
#include "Signals.h"
-#include "Itimer.h"
+#include "Timer.h" /* startTimer, stopTimer */
#include "Weak.h"
#include "Ticky.h"
#include "StgRun.h"
#include "Prelude.h" /* fixupRTStoPreludeRefs */
#include "HsFFI.h"
#include "Linker.h"
+#include "ThreadLabels.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_TARGET_OS)
+#include "win32/AsyncIO.h"
+#endif
-static int rts_has_started_up = 0;
-#if defined(PAR)
-ullong startTime = 0;
+#include <stdlib.h>
+
+#ifdef HAVE_LOCALE_H
+#include <locale.h>
#endif
-EXTFUN(__stginit_Prelude);
-static void initModules ( void (*)(void) );
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
-void
-setProgArgv(int argc, char *argv[])
+// Flag Structure
+struct RTS_FLAGS RtsFlags;
+
+// Count of how many outstanding hs_init()s there have been.
+static int hs_init_count = 0;
+
+// 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;
+ }
}
+/* -----------------------------------------------------------------------------
+ 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);
+ prog_argc = *argc;
+ prog_argv = *argv;
+ }
#if defined(PAR)
/* NB: this really must be done after processing the RTS flags */
/* initialise the stable pointer table */
initStablePtrTable();
-#if defined(PROFILING) || defined(DEBUG)
- initProfiling1();
-#endif
-
- /* run the per-module initialisation code */
- initModules(init_root);
+ /* initialise thread label table (tso->char*) */
+ initThreadLabelTable();
#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. */
- init_default_handlers();
+ initDefaultHandlers();
#endif
+#if defined(mingw32_TARGET_OS)
+ startupAsyncIO();
+#endif
+
#ifdef RTS_GTK_FRONTPANEL
if (RtsFlags.GcFlags.frontpanel) {
initFrontPanel();
}
#endif
+#ifdef HAVE_LOCALE_H
+ setlocale(LC_ALL,"");
+#endif
+
/* Record initialization times */
stat_endInit();
}
+// Compatibility interface
+void
+startupHaskell(int argc, char *argv[], void (*init_root)(void))
+{
+ hs_init(&argc, &argv);
+ hs_add_root(init_root);
+}
+
+
+/* -----------------------------------------------------------------------------
+ Getting/Setting the program's arguments.
+
+ These are used by System.Environment.
+ -------------------------------------------------------------------------- */
+
+void
+getProgArgv(int *argc, char **argv[])
+{
+ if (argc) { *argc = prog_argc; }
+ if (argv) { *argv = prog_argv; }
+}
+
+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;
+}
+
/* -----------------------------------------------------------------------------
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))
{
+ bdescr *bd;
#ifdef SMP
Capability cap;
#else
-#define cap MainRegTable
+#define cap MainCapability
#endif
+ nat init_sp;
+
+ if (hs_init_count <= 0) {
+ barf("hs_add_root() must be called after hs_init()");
+ }
init_sp = 0;
- init_stack = (F_ *)allocate(INIT_STACK_SIZE / sizeof(W_));
+ 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.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(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 (hs_init_count <= 0) {
+ barf("too many hs_exit()s");
+ }
+ 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)
- /* Finalize any remaining weak pointers */
- finalizeWeakPointersNow();
+ /* Finalize any remaining weak pointers */
+ finalizeWeakPointersNow();
#endif
-
+
#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) || defined(DEBUG)
- endProfiling();
+#if defined(PROFILING)
+ reportCCSProfiling();
#endif
-#if defined(PROFILING)
- report_ccs_profiling();
+#if defined(PROFILING) || defined(DEBUG)
+ endProfiling();
#endif
+#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_TARGET_OS)
+ shutdownAsyncIO();
#endif
+}
+
+// Compatibility interfaces
+void
+shutdownHaskell(void)
+{
+ hs_exit();
+}
- rts_has_started_up=0;
+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 */