[p5sagit/p5-mst-13.2.git] / ext / Devel / DProf / DProf.xs

#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

/*#define DBG_SUB 1      */
/*#define DBG_TIMER 1    */

#ifdef DBG_SUB
#  define DBG_SUB_NOTIFY(A,B) warn(A, B)
#else
#  define DBG_SUB_NOTIFY(A,B)  /* nothing */
#endif

#ifdef DBG_TIMER
#  define DBG_TIMER_NOTIFY(A) warn(A)
#else
#  define DBG_TIMER_NOTIFY(A)  /* nothing */
#endif

/* HZ == clock ticks per second */
#ifdef VMS
#  define HZ ((I32)CLK_TCK)
#  define DPROF_HZ HZ
#  include <starlet.h>  /* prototype for sys$gettim() */
#  include <lib$routines.h>
#  define Times(ptr) (dprof_times(aTHX_ ptr))
#else
#  ifndef HZ
#    ifdef CLK_TCK
#      define HZ ((I32)CLK_TCK)
#    else
#      define HZ 60
#    endif
#  endif
#  ifdef OS2				/* times() has significant overhead */
#    define Times(ptr) (dprof_times(aTHX_ ptr))
#    define INCL_DOSPROFILE
#    define INCL_DOSERRORS
#    include <os2.h>
#    define toLongLong(arg) (*(long long*)&(arg))
#    define DPROF_HZ g_dprof_ticks
#  else
#    define Times(ptr) (times(ptr))
#    define DPROF_HZ HZ
#  endif 
#endif

XS(XS_Devel__DProf_END);        /* used by prof_mark() */

/* Everything is built on times(2).  See its manpage for a description
 * of the timings.
 */

union prof_any {
        clock_t tms_utime;  /* cpu time spent in user space */
        clock_t tms_stime;  /* cpu time spent in system */
        clock_t realtime;   /* elapsed real time, in ticks */
        char *name;
        U32 id;
        opcode ptype;
};

typedef union prof_any PROFANY;

typedef struct {
    U32		dprof_ticks;
    char*	out_file_name;	/* output file (defaults to tmon.out) */
    PerlIO*	fp;		/* pointer to tmon.out file */
    long	TIMES_LOCATION;	/* Where in the file to store the time totals */
    int		SAVE_STACK;	/* How much data to buffer until end of run */
    int		prof_pid;	/* pid of profiled process */
    struct tms	prof_start;
    struct tms	prof_end;
    clock_t	rprof_start;	/* elapsed real time ticks */
    clock_t	rprof_end;
    clock_t	wprof_u;
    clock_t	wprof_s;
    clock_t	wprof_r;
    clock_t	otms_utime;
    clock_t	otms_stime;
    clock_t	orealtime;
    PROFANY*	profstack;
    int		profstack_max;
    int		profstack_ix;
    HV*		cv_hash;
    U32		total;
    U32		lastid;
    U32		default_perldb;
    UV		depth;
#ifdef OS2
    ULONG	frequ;
    long long	start_cnt;
#endif
#ifdef PERL_IMPLICIT_CONTEXT
#  define register
    pTHX;
#  undef register
#endif
} prof_state_t;

prof_state_t g_prof_state;

#define g_dprof_ticks		g_prof_state.dprof_ticks
#define g_out_file_name		g_prof_state.out_file_name
#define g_fp			g_prof_state.fp
#define g_TIMES_LOCATION	g_prof_state.TIMES_LOCATION
#define g_SAVE_STACK		g_prof_state.SAVE_STACK
#define g_prof_pid		g_prof_state.prof_pid
#define g_prof_start		g_prof_state.prof_start
#define g_prof_end		g_prof_state.prof_end
#define g_rprof_start		g_prof_state.rprof_start
#define g_rprof_end		g_prof_state.rprof_end
#define g_wprof_u		g_prof_state.wprof_u
#define g_wprof_s		g_prof_state.wprof_s
#define g_wprof_r		g_prof_state.wprof_r
#define g_otms_utime		g_prof_state.otms_utime
#define g_otms_stime		g_prof_state.otms_stime
#define g_orealtime		g_prof_state.orealtime
#define g_profstack		g_prof_state.profstack
#define g_profstack_max		g_prof_state.profstack_max
#define g_profstack_ix		g_prof_state.profstack_ix
#define g_cv_hash		g_prof_state.cv_hash
#define g_total			g_prof_state.total
#define g_lastid		g_prof_state.lastid
#define g_default_perldb	g_prof_state.default_perldb
#define g_depth			g_prof_state.depth
#ifdef PERL_IMPLICIT_CONTEXT
#  define g_THX			g_prof_state.aTHX
#endif
#ifdef OS2
#  define g_frequ		g_prof_state.frequ
#  define g_start_cnt		g_prof_state.start_cnt
#endif

clock_t
dprof_times(pTHX_ struct tms *t)
{
#ifdef OS2
    ULONG rc;
    QWORD cnt;
    STRLEN n_a;
    
    if (!g_frequ) {
	if (CheckOSError(DosTmrQueryFreq(&g_frequ)))
	    croak("DosTmrQueryFreq: %s", SvPV(perl_get_sv("!",TRUE),n_a));
	else
	    g_frequ = g_frequ/DPROF_HZ;	/* count per tick */
	if (CheckOSError(DosTmrQueryTime(&cnt)))
	    croak("DosTmrQueryTime: %s",
		  SvPV(perl_get_sv("!",TRUE), n_a));
	g_start_cnt = toLongLong(cnt);
    }

    if (CheckOSError(DosTmrQueryTime(&cnt)))
	    croak("DosTmrQueryTime: %s", SvPV(perl_get_sv("!",TRUE), n_a));
    t->tms_stime = 0;
    return (t->tms_utime = (toLongLong(cnt) - g_start_cnt)/g_frequ);
#else		/* !OS2 */
#  ifdef VMS
    clock_t retval;
    /* Get wall time and convert to 10 ms intervals to
     * produce the return value dprof expects */
#    if defined(__DECC) && defined (__ALPHA)
#      include <ints.h>
    uint64 vmstime;
    _ckvmssts(sys$gettim(&vmstime));
    vmstime /= 100000;
    retval = vmstime & 0x7fffffff;
#    else
    /* (Older hw or ccs don't have an atomic 64-bit type, so we
     * juggle 32-bit ints (and a float) to produce a time_t result
     * with minimal loss of information.) */
    long int vmstime[2],remainder,divisor = 100000;
    _ckvmssts(sys$gettim((unsigned long int *)vmstime));
    vmstime[1] &= 0x7fff;  /* prevent overflow in EDIV */
    _ckvmssts(lib$ediv(&divisor,vmstime,(long int *)&retval,&remainder));
#    endif
    /* Fill in the struct tms using the CRTL routine . . .*/
    times((tbuffer_t *)t);
    return (clock_t) retval;
#  else		/* !VMS && !OS2 */
    return times(t);
#  endif
#endif
}

static void
prof_dumpa(pTHX_ opcode ptype, U32 id)
{
    if (ptype == OP_LEAVESUB) {
	PerlIO_printf(g_fp,"- %"UVxf"\n", (UV)id);
    }
    else if(ptype == OP_ENTERSUB) {
	PerlIO_printf(g_fp,"+ %"UVxf"\n", (UV)id);
    }
    else if(ptype == OP_GOTO) {
	PerlIO_printf(g_fp,"* %"UVxf"\n", (UV)id);
    }
    else if(ptype == OP_DIE) {
	PerlIO_printf(g_fp,"/ %"UVxf"\n", (UV)id);
    }
    else {
	PerlIO_printf(g_fp,"Profiler unknown prof code %d\n", ptype);
    }
}   

static void
prof_dumps(pTHX_ U32 id, char *pname, char *gname)
{
    PerlIO_printf(g_fp,"& %"UVxf" %s %s\n", (UV)id, pname, gname);
}   

static void
prof_dumpt(pTHX_ long tms_utime, long tms_stime, long realtime)
{
    PerlIO_printf(g_fp,"@ %ld %ld %ld\n", tms_utime, tms_stime, realtime);
}   

static void
prof_dump_until(pTHX_ long ix)
{
    long base = 0;
    struct tms t1, t2;
    clock_t realtime1, realtime2;

    realtime1 = Times(&t1);

    while (base < ix) {
	opcode ptype = g_profstack[base++].ptype;
	if (ptype == OP_TIME) {
	    long tms_utime = g_profstack[base++].tms_utime;
	    long tms_stime = g_profstack[base++].tms_stime;
	    long realtime = g_profstack[base++].realtime;

	    prof_dumpt(aTHX_ tms_utime, tms_stime, realtime);
	}
	else if (ptype == OP_GV) {
	    U32 id = g_profstack[base++].id;
	    char *pname = g_profstack[base++].name;
	    char *gname = g_profstack[base++].name;

	    prof_dumps(aTHX_ id, pname, gname);
	}
	else {
	    U32 id = g_profstack[base++].id;
	    prof_dumpa(aTHX_ ptype, id);
	}
    }
    PerlIO_flush(g_fp);
    realtime2 = Times(&t2);
    if (realtime2 != realtime1 || t1.tms_utime != t2.tms_utime
	|| t1.tms_stime != t2.tms_stime) {
	g_wprof_r += realtime2 - realtime1;
	g_wprof_u += t2.tms_utime - t1.tms_utime;
	g_wprof_s += t2.tms_stime - t1.tms_stime;

	PerlIO_printf(g_fp,"+ & Devel::DProf::write\n");
	PerlIO_printf(g_fp,"@ %"IVdf" %"IVdf" %"IVdf"\n", 
		      /* The (IV) casts are one possibility:
		       * the Painfully Correct Way would be to
		       * have Clock_t_f. */
		      (IV)(t2.tms_utime - t1.tms_utime),
		      (IV)(t2.tms_stime - t1.tms_stime), 
		      (IV)(realtime2 - realtime1));
	PerlIO_printf(g_fp,"- & Devel::DProf::write\n");
	g_otms_utime = t2.tms_utime;
	g_otms_stime = t2.tms_stime;
	g_orealtime = realtime2;
	PerlIO_flush(g_fp);
    }
}

static void
prof_mark(pTHX_ opcode ptype)
{
    struct tms t;
    clock_t realtime, rdelta, udelta, sdelta;
    U32 id;
    SV *Sub = GvSV(PL_DBsub);	/* name of current sub */

    if (g_SAVE_STACK) {
	if (g_profstack_ix + 5 > g_profstack_max) {
		g_profstack_max = g_profstack_max * 3 / 2;
		Renew(g_profstack, g_profstack_max, PROFANY);
	}
    }

    realtime = Times(&t);
    rdelta = realtime - g_orealtime;
    udelta = t.tms_utime - g_otms_utime;
    sdelta = t.tms_stime - g_otms_stime;
    if (rdelta || udelta || sdelta) {
	if (g_SAVE_STACK) {
	    g_profstack[g_profstack_ix++].ptype = OP_TIME;
	    g_profstack[g_profstack_ix++].tms_utime = udelta;
	    g_profstack[g_profstack_ix++].tms_stime = sdelta;
	    g_profstack[g_profstack_ix++].realtime = rdelta;
	}
	else { /* Write it to disk now so's not to eat up core */
	    if (g_prof_pid == (int)getpid()) {
		prof_dumpt(aTHX_ udelta, sdelta, rdelta);
		PerlIO_flush(g_fp);
	    }
	}
	g_orealtime = realtime;
	g_otms_stime = t.tms_stime;
	g_otms_utime = t.tms_utime;
    }

    {
	SV **svp;
	char *gname, *pname;
	CV *cv;

	cv = INT2PTR(CV*,SvIVX(Sub));
	svp = hv_fetch(g_cv_hash, (char*)&cv, sizeof(CV*), TRUE);
	if (!SvOK(*svp)) {
	    GV *gv = CvGV(cv);
		
	    sv_setiv(*svp, id = ++g_lastid);
	    pname = ((GvSTASH(gv) && HvNAME(GvSTASH(gv))) 
		     ? HvNAME(GvSTASH(gv)) 
		     : "(null)");
	    gname = GvNAME(gv);
	    if (CvXSUB(cv) == XS_Devel__DProf_END)
		return;
	    if (g_SAVE_STACK) { /* Store it for later recording  -JH */
		g_profstack[g_profstack_ix++].ptype = OP_GV;
		g_profstack[g_profstack_ix++].id = id;
		g_profstack[g_profstack_ix++].name = pname;
		g_profstack[g_profstack_ix++].name = gname;
	    }
	    else { /* Write it to disk now so's not to eat up core */
		/* Only record the parent's info */
		if (g_prof_pid == (int)getpid()) {
		    prof_dumps(aTHX_ id, pname, gname);
		    PerlIO_flush(g_fp);
		}
		else
		    PL_perldb = 0;		/* Do not debug the kid. */
	    }
	}
	else {
	    id = SvIV(*svp);
	}
    }

    g_total++;
    if (g_SAVE_STACK) { /* Store it for later recording  -JH */
	g_profstack[g_profstack_ix++].ptype = ptype;
	g_profstack[g_profstack_ix++].id = id;

	/* Only record the parent's info */
	if (g_SAVE_STACK < g_profstack_ix) {
	    if (g_prof_pid == (int)getpid())
		prof_dump_until(aTHX_ g_profstack_ix);
	    else
		PL_perldb = 0;		/* Do not debug the kid. */
	    g_profstack_ix = 0;
	}
    }
    else { /* Write it to disk now so's not to eat up core */

	/* Only record the parent's info */
	if (g_prof_pid == (int)getpid()) {
	    prof_dumpa(aTHX_ ptype, id);
	    PerlIO_flush(g_fp);
	}
	else
	    PL_perldb = 0;		/* Do not debug the kid. */
    }
}

#ifdef PL_NEEDED
#  define defstash PL_defstash
#endif

/* Counts overhead of prof_mark and extra XS call. */
static void
test_time(pTHX_ clock_t *r, clock_t *u, clock_t *s)
{
    CV *cv = perl_get_cv("Devel::DProf::NONESUCH_noxs", FALSE);
    int i, j, k = 0;
    HV *oldstash = PL_curstash;
    struct tms t1, t2;
    clock_t realtime1 = 0, realtime2 = 0;
    U32 ototal = g_total;
    U32 ostack = g_SAVE_STACK;
    U32 operldb = PL_perldb;

    g_SAVE_STACK = 1000000;
    realtime1 = Times(&t1);
    
    while (k < 2) {
	i = 0;
	    /* Disable debugging of perl_call_sv on second pass: */
	PL_curstash = (k == 0 ? PL_defstash : PL_debstash);
	PL_perldb = g_default_perldb;
	while (++i <= 100) {
	    j = 0;
	    g_profstack_ix = 0;		/* Do not let the stack grow */
	    while (++j <= 100) {
/* 		prof_mark(aTHX_ OP_ENTERSUB); */

		PUSHMARK(PL_stack_sp);
		perl_call_sv((SV*)cv, G_SCALAR);
		PL_stack_sp--;
/* 		prof_mark(aTHX_ OP_LEAVESUB); */
	    }
	}
	PL_curstash = oldstash;
	if (k == 0) {			/* Put time with debugging */
	    realtime2 = Times(&t2);
	    *r = realtime2 - realtime1;
	    *u = t2.tms_utime - t1.tms_utime;
	    *s = t2.tms_stime - t1.tms_stime;
	}
	else {				/* Subtract time without debug */
	    realtime1 = Times(&t1);
	    *r -= realtime1 - realtime2;
	    *u -= t1.tms_utime - t2.tms_utime;
	    *s -= t1.tms_stime - t2.tms_stime;	    
	}
	k++;
    }
    g_total = ototal;
    g_SAVE_STACK = ostack;
    PL_perldb = operldb;
}

static void
prof_recordheader(pTHX)
{
    clock_t r, u, s;

    /* g_fp is opened in the BOOT section */
    PerlIO_printf(g_fp, "#fOrTyTwO\n");
    PerlIO_printf(g_fp, "$hz=%"IVdf";\n", (IV)DPROF_HZ);
    PerlIO_printf(g_fp, "$XS_VERSION='DProf %s';\n", XS_VERSION);
    PerlIO_printf(g_fp, "# All values are given in HZ\n");
    test_time(aTHX_ &r, &u, &s);
    PerlIO_printf(g_fp,
		  "$over_utime=%"IVdf"; $over_stime=%"IVdf"; $over_rtime=%"IVdf";\n",
		  /* The (IV) casts are one possibility:
		   * the Painfully Correct Way would be to
		   * have Clock_t_f. */
		  (IV)u, (IV)s, (IV)r);
    PerlIO_printf(g_fp, "$over_tests=10000;\n");

    g_TIMES_LOCATION = PerlIO_tell(g_fp);

    /* Pad with whitespace. */
    /* This should be enough even for very large numbers. */
    PerlIO_printf(g_fp, "%*s\n", 240 , "");

    PerlIO_printf(g_fp, "\n");
    PerlIO_printf(g_fp, "PART2\n");

    PerlIO_flush(g_fp);
}

static void
prof_record(pTHX)
{
    /* g_fp is opened in the BOOT section */

    /* Now that we know the runtimes, fill them in at the recorded
       location -JH */

    if (g_SAVE_STACK) {
	prof_dump_until(aTHX_ g_profstack_ix);
    }
    PerlIO_seek(g_fp, g_TIMES_LOCATION, SEEK_SET);
    /* Write into reserved 240 bytes: */
    PerlIO_printf(g_fp,
		  "$rrun_utime=%"IVdf"; $rrun_stime=%"IVdf"; $rrun_rtime=%"IVdf";",
		  /* The (IV) casts are one possibility:
		   * the Painfully Correct Way would be to
		   * have Clock_t_f. */
		  (IV)(g_prof_end.tms_utime-g_prof_start.tms_utime-g_wprof_u),
		  (IV)(g_prof_end.tms_stime-g_prof_start.tms_stime-g_wprof_s),
		  (IV)(g_rprof_end-g_rprof_start-g_wprof_r));
    PerlIO_printf(g_fp, "\n$total_marks=%"IVdf, (IV)g_total);
    
    PerlIO_close(g_fp);
}

#define NONESUCH()

static void
check_depth(pTHX_ void *foo)
{
    U32 need_depth = PTR2UV(foo);
    if (need_depth != g_depth) {
	if (need_depth > g_depth) {
	    warn("garbled call depth when profiling");
	}
	else {
	    IV marks = g_depth - need_depth;

/* 	    warn("Check_depth: got %d, expected %d\n", g_depth, need_depth); */
	    while (marks--) {
		prof_mark(aTHX_ OP_DIE);
	    }
	    g_depth = need_depth;
	}
    }
}

#define for_real
#ifdef for_real

XS(XS_DB_sub)
{
    dXSARGS;
    dORIGMARK;
    SV *Sub = GvSV(PL_DBsub);		/* name of current sub */

#ifdef PERL_IMPLICIT_CONTEXT
    /* profile only the interpreter that loaded us */
    if (g_THX != aTHX) {
        PUSHMARK(ORIGMARK);
        perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME | G_NODEBUG);
    }
    else
#endif
    {
	HV *oldstash = PL_curstash;

        DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV_nolen(Sub));

	SAVEDESTRUCTOR_X(check_depth, INT2PTR(void*,g_depth));
	g_depth++;

        prof_mark(aTHX_ OP_ENTERSUB);
        PUSHMARK(ORIGMARK);
        perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME | G_NODEBUG);
        PL_curstash = oldstash;
        prof_mark(aTHX_ OP_LEAVESUB);
	g_depth--;
    }
    return;
}

XS(XS_DB_goto)
{
#ifdef PERL_IMPLICIT_CONTEXT
    if (g_THX == aTHX)
#endif
    {
        prof_mark(aTHX_ OP_GOTO);
        return;
    }
}

#endif /* for_real */

#ifdef testing

        MODULE = Devel::DProf           PACKAGE = DB

        void
        sub(...)
	PPCODE:
	    {
                dORIGMARK;
                HV *oldstash = PL_curstash;
		SV *Sub = GvSV(PL_DBsub);	/* name of current sub */
                /* SP -= items;  added by xsubpp */
                DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV_nolen(Sub));

                sv_setiv(PL_DBsingle, 0);	/* disable DB single-stepping */

                prof_mark(aTHX_ OP_ENTERSUB);
                PUSHMARK(ORIGMARK);

                PL_curstash = PL_debstash;	/* To disable debugging of perl_call_sv */
                perl_call_sv(Sub, GIMME);
                PL_curstash = oldstash;

                prof_mark(aTHX_ OP_LEAVESUB);
                SPAGAIN;
                /* PUTBACK;  added by xsubpp */
	    }

#endif /* testing */

MODULE = Devel::DProf           PACKAGE = Devel::DProf

void
END()
PPCODE:
    {
        if (PL_DBsub) {
	    /* maybe the process forked--we want only
	     * the parent's profile.
	     */
	    if (
#ifdef PERL_IMPLICIT_CONTEXT
		g_THX == aTHX &&
#endif
		g_prof_pid == (int)getpid())
	    {
		g_rprof_end = Times(&g_prof_end);
		DBG_TIMER_NOTIFY("Profiler timer is off.\n");
		prof_record(aTHX);
	    }
	}
    }

void
NONESUCH()

BOOT:
    {
	g_TIMES_LOCATION = 42;
	g_SAVE_STACK = 1<<14;
    	g_profstack_max = 128;
#ifdef PERL_IMPLICIT_CONTEXT
	g_THX = aTHX;
#endif

        /* Before we go anywhere make sure we were invoked
         * properly, else we'll dump core.
         */
        if (!PL_DBsub)
	    croak("DProf: run perl with -d to use DProf.\n");

        /* When we hook up the XS DB::sub we'll be redefining
         * the DB::sub from the PM file.  Turn off warnings
         * while we do this.
         */
        {
	    I32 warn_tmp = PL_dowarn;
	    PL_dowarn = 0;
	    newXS("DB::sub", XS_DB_sub, file);
	    newXS("DB::goto", XS_DB_goto, file);
	    PL_dowarn = warn_tmp;
        }

        sv_setiv(PL_DBsingle, 0);	/* disable DB single-stepping */

	{
	    char *buffer = getenv("PERL_DPROF_BUFFER");

	    if (buffer) {
		g_SAVE_STACK = atoi(buffer);
	    }

	    buffer = getenv("PERL_DPROF_TICKS");

	    if (buffer) {
		g_dprof_ticks = atoi(buffer); /* Used under OS/2 only */
	    }
	    else {
		g_dprof_ticks = HZ;
	    }

	    buffer = getenv("PERL_DPROF_OUT_FILE_NAME");
	    g_out_file_name = savepv(buffer ? buffer : "tmon.out");
	}

        if ((g_fp = PerlIO_open(g_out_file_name, "w")) == NULL)
	    croak("DProf: unable to write '%s', errno = %d\n",
		  g_out_file_name, errno);

	g_default_perldb = PERLDBf_NONAME | PERLDBf_SUB | PERLDBf_GOTO;
	g_cv_hash = newHV();
        g_prof_pid = (int)getpid();

	New(0, g_profstack, g_profstack_max, PROFANY);
        prof_recordheader(aTHX);
        DBG_TIMER_NOTIFY("Profiler timer is on.\n");
	g_orealtime = g_rprof_start = Times(&g_prof_start);
	g_otms_utime = g_prof_start.tms_utime;
	g_otms_stime = g_prof_start.tms_stime;
	PL_perldb = g_default_perldb;
    }
Commit	Line	Data
146174a9	1	#define PERL_NO_GET_CONTEXT
583a019e	2	#include "EXTERN.h"
	3	#include "perl.h"
	4	#include "XSUB.h"
	5
7399586d	6	/#define DBG_SUB 1 /
7399586d	7	/#define DBG_TIMER 1 /
583a019e	8
583a019e	9	#ifdef DBG_SUB
146174a9	10	# define DBG_SUB_NOTIFY(A,B) warn(A, B)
583a019e	11	#else
	12	# define DBG_SUB_NOTIFY(A,B) /* nothing */
	13	#endif
	14
	15	#ifdef DBG_TIMER
146174a9	16	# define DBG_TIMER_NOTIFY(A) warn(A)
583a019e	17	#else
	18	# define DBG_TIMER_NOTIFY(A) /* nothing */
	19	#endif
	20
583a019e	21	/* HZ == clock ticks per second */
583a019e	22	#ifdef VMS
552e38a9	23	# define HZ ((I32)CLK_TCK)
583a019e	24	# define DPROF_HZ HZ
583a019e	25	# include <starlet.h> /* prototype for sys$gettim() */
3e4b306a	26	# include <lib$routines.h>
146174a9	27	# define Times(ptr) (dprof_times(aTHX_ ptr))
583a019e	28	#else
	29	# ifndef HZ
	30	# ifdef CLK_TCK
552e38a9	31	# define HZ ((I32)CLK_TCK)
583a019e	32	# else
	33	# define HZ 60
	34	# endif
	35	# endif
	36	# ifdef OS2 /* times() has significant overhead */
146174a9	37	# define Times(ptr) (dprof_times(aTHX_ ptr))
583a019e	38	# define INCL_DOSPROFILE
	39	# define INCL_DOSERRORS
	40	# include <os2.h>
	41	# define toLongLong(arg) ((long long)&(arg))
146174a9	42	# define DPROF_HZ g_dprof_ticks
583a019e	43	# else
	44	# define Times(ptr) (times(ptr))
	45	# define DPROF_HZ HZ
	46	# endif
	47	#endif
	48
	49	XS(XS_Devel__DProf_END); /* used by prof_mark() */
	50
583a019e	51	/* Everything is built on times(2). See its manpage for a description
	52	* of the timings.
	53	*/
	54
583a019e	55	union prof_any {
	56	clock_t tms_utime; /* cpu time spent in user space */
	57	clock_t tms_stime; /* cpu time spent in system */
	58	clock_t realtime; /* elapsed real time, in ticks */
	59	char *name;
	60	U32 id;
	61	opcode ptype;
	62	};
	63
	64	typedef union prof_any PROFANY;
	65
146174a9	66	typedef struct {
	67	U32 dprof_ticks;
	68	char* out_file_name; /* output file (defaults to tmon.out) */
	69	PerlIO* fp; /* pointer to tmon.out file */
	70	long TIMES_LOCATION; /* Where in the file to store the time totals */
	71	int SAVE_STACK; /* How much data to buffer until end of run */
	72	int prof_pid; /* pid of profiled process */
	73	struct tms prof_start;
	74	struct tms prof_end;
	75	clock_t rprof_start; /* elapsed real time ticks */
	76	clock_t rprof_end;
	77	clock_t wprof_u;
	78	clock_t wprof_s;
	79	clock_t wprof_r;
	80	clock_t otms_utime;
	81	clock_t otms_stime;
	82	clock_t orealtime;
	83	PROFANY* profstack;
	84	int profstack_max;
	85	int profstack_ix;
	86	HV* cv_hash;
	87	U32 total;
	88	U32 lastid;
	89	U32 default_perldb;
425d70b4	90	UV depth;
146174a9	91	#ifdef OS2
	92	ULONG frequ;
	93	long long start_cnt;
	94	#endif
	95	#ifdef PERL_IMPLICIT_CONTEXT
	96	# define register
	97	pTHX;
	98	# undef register
	99	#endif
	100	} prof_state_t;
	101
	102	prof_state_t g_prof_state;
	103
	104	#define g_dprof_ticks g_prof_state.dprof_ticks
	105	#define g_out_file_name g_prof_state.out_file_name
	106	#define g_fp g_prof_state.fp
	107	#define g_TIMES_LOCATION g_prof_state.TIMES_LOCATION
	108	#define g_SAVE_STACK g_prof_state.SAVE_STACK
	109	#define g_prof_pid g_prof_state.prof_pid
	110	#define g_prof_start g_prof_state.prof_start
	111	#define g_prof_end g_prof_state.prof_end
	112	#define g_rprof_start g_prof_state.rprof_start
	113	#define g_rprof_end g_prof_state.rprof_end
	114	#define g_wprof_u g_prof_state.wprof_u
	115	#define g_wprof_s g_prof_state.wprof_s
	116	#define g_wprof_r g_prof_state.wprof_r
	117	#define g_otms_utime g_prof_state.otms_utime
	118	#define g_otms_stime g_prof_state.otms_stime
	119	#define g_orealtime g_prof_state.orealtime
	120	#define g_profstack g_prof_state.profstack
	121	#define g_profstack_max g_prof_state.profstack_max
	122	#define g_profstack_ix g_prof_state.profstack_ix
	123	#define g_cv_hash g_prof_state.cv_hash
	124	#define g_total g_prof_state.total
	125	#define g_lastid g_prof_state.lastid
	126	#define g_default_perldb g_prof_state.default_perldb
	127	#define g_depth g_prof_state.depth
	128	#ifdef PERL_IMPLICIT_CONTEXT
	129	# define g_THX g_prof_state.aTHX
	130	#endif
	131	#ifdef OS2
	132	# define g_frequ g_prof_state.frequ
	133	# define g_start_cnt g_prof_state.start_cnt
	134	#endif
583a019e	135
146174a9	136	clock_t
146174a9	137	dprof_times(pTHX_ struct tms *t)
583a019e	138	{
146174a9	139	#ifdef OS2
	140	ULONG rc;
	141	QWORD cnt;
cb50131a	142	STRLEN n_a;
146174a9	143
	144	if (!g_frequ) {
	145	if (CheckOSError(DosTmrQueryFreq(&g_frequ)))
cb50131a	146	croak("DosTmrQueryFreq: %s", SvPV(perl_get_sv("!",TRUE),n_a));
146174a9	147	else
	148	g_frequ = g_frequ/DPROF_HZ; /* count per tick */
	149	if (CheckOSError(DosTmrQueryTime(&cnt)))
	150	croak("DosTmrQueryTime: %s",
cb50131a	151	SvPV(perl_get_sv("!",TRUE), n_a));
146174a9	152	g_start_cnt = toLongLong(cnt);
583a019e	153	}
146174a9	154
146174a9	155	if (CheckOSError(DosTmrQueryTime(&cnt)))
cb50131a	156	croak("DosTmrQueryTime: %s", SvPV(perl_get_sv("!",TRUE), n_a));
146174a9	157	t->tms_stime = 0;
	158	return (t->tms_utime = (toLongLong(cnt) - g_start_cnt)/g_frequ);
	159	#else /* !OS2 */
	160	# ifdef VMS
	161	clock_t retval;
	162	/* Get wall time and convert to 10 ms intervals to
	163	* produce the return value dprof expects */
	164	# if defined(__DECC) && defined (__ALPHA)
	165	# include <ints.h>
	166	uint64 vmstime;
	167	_ckvmssts(sys$gettim(&vmstime));
	168	vmstime /= 100000;
	169	retval = vmstime & 0x7fffffff;
	170	# else
	171	/* (Older hw or ccs don't have an atomic 64-bit type, so we
	172	* juggle 32-bit ints (and a float) to produce a time_t result
	173	* with minimal loss of information.) */
	174	long int vmstime[2],remainder,divisor = 100000;
	175	_ckvmssts(sys$gettim((unsigned long int *)vmstime));
	176	vmstime[1] &= 0x7fff; /* prevent overflow in EDIV */
	177	_ckvmssts(lib$ediv(&divisor,vmstime,(long int *)&retval,&remainder));
	178	# endif
	179	/* Fill in the struct tms using the CRTL routine . . .*/
	180	times((tbuffer_t *)t);
	181	return (clock_t) retval;
	182	# else /* !VMS && !OS2 */
	183	return times(t);
	184	# endif
	185	#endif
	186	}
583a019e	187
583a019e	188	static void
146174a9	189	prof_dumpa(pTHX_ opcode ptype, U32 id)
583a019e	190	{
146174a9	191	if (ptype == OP_LEAVESUB) {
	192	PerlIO_printf(g_fp,"- %"UVxf"\n", (UV)id);
	193	}
	194	else if(ptype == OP_ENTERSUB) {
	195	PerlIO_printf(g_fp,"+ %"UVxf"\n", (UV)id);
	196	}
	197	else if(ptype == OP_GOTO) {
	198	PerlIO_printf(g_fp,"* %"UVxf"\n", (UV)id);
	199	}
	200	else if(ptype == OP_DIE) {
	201	PerlIO_printf(g_fp,"/ %"UVxf"\n", (UV)id);
	202	}
	203	else {
	204	PerlIO_printf(g_fp,"Profiler unknown prof code %d\n", ptype);
583a019e	205	}
	206	}
	207
	208	static void
146174a9	209	prof_dumps(pTHX_ U32 id, char pname, char gname)
583a019e	210	{
146174a9	211	PerlIO_printf(g_fp,"& %"UVxf" %s %s\n", (UV)id, pname, gname);
583a019e	212	}
583a019e	213
583a019e	214	static void
146174a9	215	prof_dumpt(pTHX_ long tms_utime, long tms_stime, long realtime)
583a019e	216	{
146174a9	217	PerlIO_printf(g_fp,"@ %ld %ld %ld\n", tms_utime, tms_stime, realtime);
583a019e	218	}
	219
	220	static void
146174a9	221	prof_dump_until(pTHX_ long ix)
583a019e	222	{
	223	long base = 0;
	224	struct tms t1, t2;
	225	clock_t realtime1, realtime2;
	226
	227	realtime1 = Times(&t1);
	228
146174a9	229	while (base < ix) {
146174a9	230	opcode ptype = g_profstack[base++].ptype;
583a019e	231	if (ptype == OP_TIME) {
146174a9	232	long tms_utime = g_profstack[base++].tms_utime;
	233	long tms_stime = g_profstack[base++].tms_stime;
	234	long realtime = g_profstack[base++].realtime;
	235
	236	prof_dumpt(aTHX_ tms_utime, tms_stime, realtime);
	237	}
	238	else if (ptype == OP_GV) {
	239	U32 id = g_profstack[base++].id;
	240	char *pname = g_profstack[base++].name;
	241	char *gname = g_profstack[base++].name;
	242
	243	prof_dumps(aTHX_ id, pname, gname);
	244	}
	245	else {
	246	U32 id = g_profstack[base++].id;
	247	prof_dumpa(aTHX_ ptype, id);
583a019e	248	}
583a019e	249	}
146174a9	250	PerlIO_flush(g_fp);
583a019e	251	realtime2 = Times(&t2);
	252	if (realtime2 != realtime1 \|\| t1.tms_utime != t2.tms_utime
	253	\|\| t1.tms_stime != t2.tms_stime) {
146174a9	254	g_wprof_r += realtime2 - realtime1;
	255	g_wprof_u += t2.tms_utime - t1.tms_utime;
	256	g_wprof_s += t2.tms_stime - t1.tms_stime;
	257
	258	PerlIO_printf(g_fp,"+ & Devel::DProf::write\n");
	259	PerlIO_printf(g_fp,"@ %"IVdf" %"IVdf" %"IVdf"\n",
	260	/* The (IV) casts are one possibility:
	261	* the Painfully Correct Way would be to
	262	* have Clock_t_f. */
	263	(IV)(t2.tms_utime - t1.tms_utime),
	264	(IV)(t2.tms_stime - t1.tms_stime),
	265	(IV)(realtime2 - realtime1));
	266	PerlIO_printf(g_fp,"- & Devel::DProf::write\n");
	267	g_otms_utime = t2.tms_utime;
	268	g_otms_stime = t2.tms_stime;
	269	g_orealtime = realtime2;
	270	PerlIO_flush(g_fp);
583a019e	271	}
	272	}
	273
583a019e	274	static void
146174a9	275	prof_mark(pTHX_ opcode ptype)
583a019e	276	{
146174a9	277	struct tms t;
146174a9	278	clock_t realtime, rdelta, udelta, sdelta;
146174a9	279	U32 id;
	280	SV Sub = GvSV(PL_DBsub); / name of current sub */
	281
	282	if (g_SAVE_STACK) {
	283	if (g_profstack_ix + 5 > g_profstack_max) {
	284	g_profstack_max = g_profstack_max * 3 / 2;
	285	Renew(g_profstack, g_profstack_max, PROFANY);
	286	}
	287	}
583a019e	288
146174a9	289	realtime = Times(&t);
	290	rdelta = realtime - g_orealtime;
	291	udelta = t.tms_utime - g_otms_utime;
	292	sdelta = t.tms_stime - g_otms_stime;
	293	if (rdelta \|\| udelta \|\| sdelta) {
	294	if (g_SAVE_STACK) {
	295	g_profstack[g_profstack_ix++].ptype = OP_TIME;
	296	g_profstack[g_profstack_ix++].tms_utime = udelta;
	297	g_profstack[g_profstack_ix++].tms_stime = sdelta;
	298	g_profstack[g_profstack_ix++].realtime = rdelta;
	299	}
	300	else { /* Write it to disk now so's not to eat up core */
	301	if (g_prof_pid == (int)getpid()) {
	302	prof_dumpt(aTHX_ udelta, sdelta, rdelta);
	303	PerlIO_flush(g_fp);
583a019e	304	}
583a019e	305	}
146174a9	306	g_orealtime = realtime;
	307	g_otms_stime = t.tms_stime;
	308	g_otms_utime = t.tms_utime;
	309	}
583a019e	310
146174a9	311	{
	312	SV **svp;
	313	char gname, pname;
	314	CV *cv;
	315
	316	cv = INT2PTR(CV*,SvIVX(Sub));
	317	svp = hv_fetch(g_cv_hash, (char)&cv, sizeof(CV), TRUE);
	318	if (!SvOK(*svp)) {
	319	GV *gv = CvGV(cv);
	320
	321	sv_setiv(*svp, id = ++g_lastid);
	322	pname = ((GvSTASH(gv) && HvNAME(GvSTASH(gv)))
	323	? HvNAME(GvSTASH(gv))
	324	: "(null)");
	325	gname = GvNAME(gv);
	326	if (CvXSUB(cv) == XS_Devel__DProf_END)
	327	return;
	328	if (g_SAVE_STACK) { /* Store it for later recording -JH */
	329	g_profstack[g_profstack_ix++].ptype = OP_GV;
	330	g_profstack[g_profstack_ix++].id = id;
	331	g_profstack[g_profstack_ix++].name = pname;
	332	g_profstack[g_profstack_ix++].name = gname;
	333	}
	334	else { /* Write it to disk now so's not to eat up core */
	335	/* Only record the parent's info */
	336	if (g_prof_pid == (int)getpid()) {
	337	prof_dumps(aTHX_ id, pname, gname);
	338	PerlIO_flush(g_fp);
583a019e	339	}
146174a9	340	else
146174a9	341	PL_perldb = 0; /* Do not debug the kid. */
583a019e	342	}
583a019e	343	}
146174a9	344	else {
	345	id = SvIV(*svp);
	346	}
	347	}
583a019e	348
146174a9	349	g_total++;
	350	if (g_SAVE_STACK) { /* Store it for later recording -JH */
	351	g_profstack[g_profstack_ix++].ptype = ptype;
	352	g_profstack[g_profstack_ix++].id = id;
	353
	354	/* Only record the parent's info */
	355	if (g_SAVE_STACK < g_profstack_ix) {
	356	if (g_prof_pid == (int)getpid())
	357	prof_dump_until(aTHX_ g_profstack_ix);
	358	else
	359	PL_perldb = 0; /* Do not debug the kid. */
	360	g_profstack_ix = 0;
	361	}
	362	}
	363	else { /* Write it to disk now so's not to eat up core */
583a019e	364
146174a9	365	/* Only record the parent's info */
	366	if (g_prof_pid == (int)getpid()) {
	367	prof_dumpa(aTHX_ ptype, id);
	368	PerlIO_flush(g_fp);
	369	}
	370	else
	371	PL_perldb = 0; /* Do not debug the kid. */
	372	}
583a019e	373	}
583a019e	374
583a019e	375	#ifdef PL_NEEDED
	376	# define defstash PL_defstash
	377	#endif
	378
	379	/* Counts overhead of prof_mark and extra XS call. */
	380	static void
146174a9	381	test_time(pTHX_ clock_t r, clock_t u, clock_t *s)
583a019e	382	{
583a019e	383	CV *cv = perl_get_cv("Devel::DProf::NONESUCH_noxs", FALSE);
583a019e	384	int i, j, k = 0;
146174a9	385	HV *oldstash = PL_curstash;
583a019e	386	struct tms t1, t2;
9c5ffd7c	387	clock_t realtime1 = 0, realtime2 = 0;
146174a9	388	U32 ototal = g_total;
	389	U32 ostack = g_SAVE_STACK;
	390	U32 operldb = PL_perldb;
583a019e	391
146174a9	392	g_SAVE_STACK = 1000000;
583a019e	393	realtime1 = Times(&t1);
	394
	395	while (k < 2) {
	396	i = 0;
	397	/* Disable debugging of perl_call_sv on second pass: */
146174a9	398	PL_curstash = (k == 0 ? PL_defstash : PL_debstash);
146174a9	399	PL_perldb = g_default_perldb;
583a019e	400	while (++i <= 100) {
583a019e	401	j = 0;
146174a9	402	g_profstack_ix = 0; /* Do not let the stack grow */
583a019e	403	while (++j <= 100) {
146174a9	404	/* prof_mark(aTHX_ OP_ENTERSUB); */
583a019e	405
146174a9	406	PUSHMARK(PL_stack_sp);
	407	perl_call_sv((SV*)cv, G_SCALAR);
	408	PL_stack_sp--;
	409	/* prof_mark(aTHX_ OP_LEAVESUB); */
583a019e	410	}
583a019e	411	}
146174a9	412	PL_curstash = oldstash;
583a019e	413	if (k == 0) { /* Put time with debugging */
	414	realtime2 = Times(&t2);
	415	*r = realtime2 - realtime1;
	416	*u = t2.tms_utime - t1.tms_utime;
	417	*s = t2.tms_stime - t1.tms_stime;
146174a9	418	}
146174a9	419	else { /* Subtract time without debug */
583a019e	420	realtime1 = Times(&t1);
	421	*r -= realtime1 - realtime2;
	422	*u -= t1.tms_utime - t2.tms_utime;
	423	*s -= t1.tms_stime - t2.tms_stime;
	424	}
	425	k++;
	426	}
146174a9	427	g_total = ototal;
	428	g_SAVE_STACK = ostack;
	429	PL_perldb = operldb;
583a019e	430	}
	431
	432	static void
146174a9	433	prof_recordheader(pTHX)
583a019e	434	{
146174a9	435	clock_t r, u, s;
	436
	437	/* g_fp is opened in the BOOT section */
	438	PerlIO_printf(g_fp, "#fOrTyTwO\n");
	439	PerlIO_printf(g_fp, "$hz=%"IVdf";\n", (IV)DPROF_HZ);
	440	PerlIO_printf(g_fp, "$XS_VERSION='DProf %s';\n", XS_VERSION);
	441	PerlIO_printf(g_fp, "# All values are given in HZ\n");
	442	test_time(aTHX_ &r, &u, &s);
	443	PerlIO_printf(g_fp,
	444	"$over_utime=%"IVdf"; $over_stime=%"IVdf"; $over_rtime=%"IVdf";\n",
	445	/* The (IV) casts are one possibility:
	446	* the Painfully Correct Way would be to
	447	* have Clock_t_f. */
	448	(IV)u, (IV)s, (IV)r);
	449	PerlIO_printf(g_fp, "$over_tests=10000;\n");
	450
	451	g_TIMES_LOCATION = PerlIO_tell(g_fp);
	452
	453	/* Pad with whitespace. */
	454	/* This should be enough even for very large numbers. */
	455	PerlIO_printf(g_fp, "%*s\n", 240 , "");
	456
	457	PerlIO_printf(g_fp, "\n");
	458	PerlIO_printf(g_fp, "PART2\n");
	459
	460	PerlIO_flush(g_fp);
583a019e	461	}
	462
	463	static void
146174a9	464	prof_record(pTHX)
583a019e	465	{
146174a9	466	/* g_fp is opened in the BOOT section */
	467
	468	/* Now that we know the runtimes, fill them in at the recorded
	469	location -JH */
583a019e	470
146174a9	471	if (g_SAVE_STACK) {
	472	prof_dump_until(aTHX_ g_profstack_ix);
	473	}
	474	PerlIO_seek(g_fp, g_TIMES_LOCATION, SEEK_SET);
	475	/* Write into reserved 240 bytes: */
	476	PerlIO_printf(g_fp,
	477	"$rrun_utime=%"IVdf"; $rrun_stime=%"IVdf"; $rrun_rtime=%"IVdf";",
	478	/* The (IV) casts are one possibility:
	479	* the Painfully Correct Way would be to
	480	* have Clock_t_f. */
	481	(IV)(g_prof_end.tms_utime-g_prof_start.tms_utime-g_wprof_u),
	482	(IV)(g_prof_end.tms_stime-g_prof_start.tms_stime-g_wprof_s),
	483	(IV)(g_rprof_end-g_rprof_start-g_wprof_r));
	484	PerlIO_printf(g_fp, "\n$total_marks=%"IVdf, (IV)g_total);
583a019e	485
146174a9	486	PerlIO_close(g_fp);
583a019e	487	}
	488
	489	#define NONESUCH()
	490
583a019e	491	static void
d7b9cf63	492	check_depth(pTHX_ void *foo)
583a019e	493	{
4b19af01	494	U32 need_depth = PTR2UV(foo);
146174a9	495	if (need_depth != g_depth) {
146174a9	496	if (need_depth > g_depth) {
583a019e	497	warn("garbled call depth when profiling");
146174a9	498	}
146174a9	499	else {
425d70b4	500	IV marks = g_depth - need_depth;
583a019e	501
146174a9	502	/* warn("Check_depth: got %d, expected %d\n", g_depth, need_depth); */
583a019e	503	while (marks--) {
146174a9	504	prof_mark(aTHX_ OP_DIE);
583a019e	505	}
146174a9	506	g_depth = need_depth;
583a019e	507	}
	508	}
	509	}
	510
	511	#define for_real
	512	#ifdef for_real
	513
	514	XS(XS_DB_sub)
	515	{
146174a9	516	dXSARGS;
	517	dORIGMARK;
	518	SV Sub = GvSV(PL_DBsub); / name of current sub */
	519
	520	#ifdef PERL_IMPLICIT_CONTEXT
	521	/* profile only the interpreter that loaded us */
	522	if (g_THX != aTHX) {
	523	PUSHMARK(ORIGMARK);
	524	perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME \| G_NODEBUG);
	525	}
	526	else
	527	#endif
	528	{
	529	HV *oldstash = PL_curstash;
583a019e	530
cb50131a	531	DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV_nolen(Sub));
583a019e	532
a6f8e609	533	SAVEDESTRUCTOR_X(check_depth, INT2PTR(void*,g_depth));
146174a9	534	g_depth++;
583a019e	535
146174a9	536	prof_mark(aTHX_ OP_ENTERSUB);
	537	PUSHMARK(ORIGMARK);
	538	perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME \| G_NODEBUG);
8063af02	539	PL_curstash = oldstash;
146174a9	540	prof_mark(aTHX_ OP_LEAVESUB);
	541	g_depth--;
	542	}
	543	return;
583a019e	544	}
	545
	546	XS(XS_DB_goto)
	547	{
146174a9	548	#ifdef PERL_IMPLICIT_CONTEXT
	549	if (g_THX == aTHX)
	550	#endif
	551	{
	552	prof_mark(aTHX_ OP_GOTO);
583a019e	553	return;
146174a9	554	}
583a019e	555	}
	556
	557	#endif /* for_real */
	558
	559	#ifdef testing
	560
	561	MODULE = Devel::DProf PACKAGE = DB
	562
	563	void
	564	sub(...)
146174a9	565	PPCODE:
146174a9	566	{
583a019e	567	dORIGMARK;
146174a9	568	HV *oldstash = PL_curstash;
146174a9	569	SV Sub = GvSV(PL_DBsub); / name of current sub */
583a019e	570	/* SP -= items; added by xsubpp */
cb50131a	571	DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV_nolen(Sub));
583a019e	572
146174a9	573	sv_setiv(PL_DBsingle, 0); /* disable DB single-stepping */
583a019e	574
146174a9	575	prof_mark(aTHX_ OP_ENTERSUB);
146174a9	576	PUSHMARK(ORIGMARK);
583a019e	577
146174a9	578	PL_curstash = PL_debstash; /* To disable debugging of perl_call_sv */
	579	perl_call_sv(Sub, GIMME);
	580	PL_curstash = oldstash;
583a019e	581
146174a9	582	prof_mark(aTHX_ OP_LEAVESUB);
583a019e	583	SPAGAIN;
583a019e	584	/* PUTBACK; added by xsubpp */
146174a9	585	}
583a019e	586
	587	#endif /* testing */
	588
	589	MODULE = Devel::DProf PACKAGE = Devel::DProf
	590
	591	void
	592	END()
146174a9	593	PPCODE:
	594	{
	595	if (PL_DBsub) {
	596	/* maybe the process forked--we want only
	597	* the parent's profile.
	598	*/
	599	if (
	600	#ifdef PERL_IMPLICIT_CONTEXT
	601	g_THX == aTHX &&
	602	#endif
	603	g_prof_pid == (int)getpid())
	604	{
	605	g_rprof_end = Times(&g_prof_end);
	606	DBG_TIMER_NOTIFY("Profiler timer is off.\n");
	607	prof_record(aTHX);
	608	}
	609	}
	610	}
583a019e	611
	612	void
	613	NONESUCH()
	614
	615	BOOT:
146174a9	616	{
	617	g_TIMES_LOCATION = 42;
	618	g_SAVE_STACK = 1<<14;
	619	g_profstack_max = 128;
	620	#ifdef PERL_IMPLICIT_CONTEXT
	621	g_THX = aTHX;
	622	#endif
	623
583a019e	624	/* Before we go anywhere make sure we were invoked
	625	* properly, else we'll dump core.
	626	*/
146174a9	627	if (!PL_DBsub)
146174a9	628	croak("DProf: run perl with -d to use DProf.\n");
583a019e	629
	630	/* When we hook up the XS DB::sub we'll be redefining
	631	* the DB::sub from the PM file. Turn off warnings
	632	* while we do this.
	633	*/
	634	{
146174a9	635	I32 warn_tmp = PL_dowarn;
	636	PL_dowarn = 0;
	637	newXS("DB::sub", XS_DB_sub, file);
	638	newXS("DB::goto", XS_DB_goto, file);
	639	PL_dowarn = warn_tmp;
583a019e	640	}
583a019e	641
146174a9	642	sv_setiv(PL_DBsingle, 0); /* disable DB single-stepping */
583a019e	643
	644	{
	645	char *buffer = getenv("PERL_DPROF_BUFFER");
	646
	647	if (buffer) {
146174a9	648	g_SAVE_STACK = atoi(buffer);
583a019e	649	}
	650
	651	buffer = getenv("PERL_DPROF_TICKS");
	652
	653	if (buffer) {
146174a9	654	g_dprof_ticks = atoi(buffer); /* Used under OS/2 only */
	655	}
	656	else {
	657	g_dprof_ticks = HZ;
583a019e	658	}
583a019e	659
146174a9	660	buffer = getenv("PERL_DPROF_OUT_FILE_NAME");
	661	g_out_file_name = savepv(buffer ? buffer : "tmon.out");
	662	}
583a019e	663
146174a9	664	if ((g_fp = PerlIO_open(g_out_file_name, "w")) == NULL)
	665	croak("DProf: unable to write '%s', errno = %d\n",
	666	g_out_file_name, errno);
583a019e	667
146174a9	668	g_default_perldb = PERLDBf_NONAME \| PERLDBf_SUB \| PERLDBf_GOTO;
	669	g_cv_hash = newHV();
	670	g_prof_pid = (int)getpid();
583a019e	671
146174a9	672	New(0, g_profstack, g_profstack_max, PROFANY);
146174a9	673	prof_recordheader(aTHX);
583a019e	674	DBG_TIMER_NOTIFY("Profiler timer is on.\n");
146174a9	675	g_orealtime = g_rprof_start = Times(&g_prof_start);
	676	g_otms_utime = g_prof_start.tms_utime;
	677	g_otms_stime = g_prof_start.tms_stime;
	678	PL_perldb = g_default_perldb;
	679	}