[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() */
#  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;
    U32		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;
    char *name, *pv;
    char *hvname;
    STRLEN len;
    SV *sv;
    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, realtime2;
    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 */

    clock_t r, u, s;

    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 {
	    I32 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, (void*)g_depth);
	g_depth++;

        prof_mark(aTHX_ OP_ENTERSUB);
        PUSHMARK(ORIGMARK);
        perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME | G_NODEBUG);
        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() */
146174a9	26	# define Times(ptr) (dprof_times(aTHX_ ptr))
583a019e	27	#else
	28	# ifndef HZ
	29	# ifdef CLK_TCK
552e38a9	30	# define HZ ((I32)CLK_TCK)
583a019e	31	# else
	32	# define HZ 60
	33	# endif
	34	# endif
	35	# ifdef OS2 /* times() has significant overhead */
146174a9	36	# define Times(ptr) (dprof_times(aTHX_ ptr))
583a019e	37	# define INCL_DOSPROFILE
	38	# define INCL_DOSERRORS
	39	# include <os2.h>
	40	# define toLongLong(arg) ((long long)&(arg))
146174a9	41	# define DPROF_HZ g_dprof_ticks
583a019e	42	# else
	43	# define Times(ptr) (times(ptr))
	44	# define DPROF_HZ HZ
	45	# endif
	46	#endif
	47
	48	XS(XS_Devel__DProf_END); /* used by prof_mark() */
	49
583a019e	50	/* Everything is built on times(2). See its manpage for a description
	51	* of the timings.
	52	*/
	53
583a019e	54	union prof_any {
	55	clock_t tms_utime; /* cpu time spent in user space */
	56	clock_t tms_stime; /* cpu time spent in system */
	57	clock_t realtime; /* elapsed real time, in ticks */
	58	char *name;
	59	U32 id;
	60	opcode ptype;
	61	};
	62
	63	typedef union prof_any PROFANY;
	64
146174a9	65	typedef struct {
	66	U32 dprof_ticks;
	67	char* out_file_name; /* output file (defaults to tmon.out) */
	68	PerlIO* fp; /* pointer to tmon.out file */
	69	long TIMES_LOCATION; /* Where in the file to store the time totals */
	70	int SAVE_STACK; /* How much data to buffer until end of run */
	71	int prof_pid; /* pid of profiled process */
	72	struct tms prof_start;
	73	struct tms prof_end;
	74	clock_t rprof_start; /* elapsed real time ticks */
	75	clock_t rprof_end;
	76	clock_t wprof_u;
	77	clock_t wprof_s;
	78	clock_t wprof_r;
	79	clock_t otms_utime;
	80	clock_t otms_stime;
	81	clock_t orealtime;
	82	PROFANY* profstack;
	83	int profstack_max;
	84	int profstack_ix;
	85	HV* cv_hash;
	86	U32 total;
	87	U32 lastid;
	88	U32 default_perldb;
	89	U32 depth;
	90	#ifdef OS2
	91	ULONG frequ;
	92	long long start_cnt;
	93	#endif
	94	#ifdef PERL_IMPLICIT_CONTEXT
	95	# define register
	96	pTHX;
	97	# undef register
	98	#endif
	99	} prof_state_t;
	100
	101	prof_state_t g_prof_state;
	102
	103	#define g_dprof_ticks g_prof_state.dprof_ticks
	104	#define g_out_file_name g_prof_state.out_file_name
	105	#define g_fp g_prof_state.fp
	106	#define g_TIMES_LOCATION g_prof_state.TIMES_LOCATION
	107	#define g_SAVE_STACK g_prof_state.SAVE_STACK
	108	#define g_prof_pid g_prof_state.prof_pid
	109	#define g_prof_start g_prof_state.prof_start
	110	#define g_prof_end g_prof_state.prof_end
	111	#define g_rprof_start g_prof_state.rprof_start
	112	#define g_rprof_end g_prof_state.rprof_end
	113	#define g_wprof_u g_prof_state.wprof_u
	114	#define g_wprof_s g_prof_state.wprof_s
	115	#define g_wprof_r g_prof_state.wprof_r
	116	#define g_otms_utime g_prof_state.otms_utime
	117	#define g_otms_stime g_prof_state.otms_stime
	118	#define g_orealtime g_prof_state.orealtime
	119	#define g_profstack g_prof_state.profstack
	120	#define g_profstack_max g_prof_state.profstack_max
	121	#define g_profstack_ix g_prof_state.profstack_ix
	122	#define g_cv_hash g_prof_state.cv_hash
	123	#define g_total g_prof_state.total
	124	#define g_lastid g_prof_state.lastid
	125	#define g_default_perldb g_prof_state.default_perldb
	126	#define g_depth g_prof_state.depth
	127	#ifdef PERL_IMPLICIT_CONTEXT
	128	# define g_THX g_prof_state.aTHX
129	#endif
130	#ifdef OS2
131	# define g_frequ g_prof_state.frequ
132	# define g_start_cnt g_prof_state.start_cnt
133	#endif
583a019e	134
146174a9	135	clock_t
146174a9	136	dprof_times(pTHX_ struct tms *t)
583a019e	137	{
146174a9	138	#ifdef OS2
	139	ULONG rc;
	140	QWORD cnt;
cb50131a	141	STRLEN n_a;
146174a9	142
	143	if (!g_frequ) {
	144	if (CheckOSError(DosTmrQueryFreq(&g_frequ)))
cb50131a	145	croak("DosTmrQueryFreq: %s", SvPV(perl_get_sv("!",TRUE),n_a));
146174a9	146	else
	147	g_frequ = g_frequ/DPROF_HZ; /* count per tick */
	148	if (CheckOSError(DosTmrQueryTime(&cnt)))
	149	croak("DosTmrQueryTime: %s",
cb50131a	150	SvPV(perl_get_sv("!",TRUE), n_a));
146174a9	151	g_start_cnt = toLongLong(cnt);
583a019e	152	}
146174a9	153
146174a9	154	if (CheckOSError(DosTmrQueryTime(&cnt)))
cb50131a	155	croak("DosTmrQueryTime: %s", SvPV(perl_get_sv("!",TRUE), n_a));
146174a9	156	t->tms_stime = 0;
	157	return (t->tms_utime = (toLongLong(cnt) - g_start_cnt)/g_frequ);
	158	#else /* !OS2 */
	159	# ifdef VMS
	160	clock_t retval;
	161	/* Get wall time and convert to 10 ms intervals to
	162	* produce the return value dprof expects */
	163	# if defined(__DECC) && defined (__ALPHA)
	164	# include <ints.h>
	165	uint64 vmstime;
	166	_ckvmssts(sys$gettim(&vmstime));
	167	vmstime /= 100000;
	168	retval = vmstime & 0x7fffffff;
	169	# else
	170	/* (Older hw or ccs don't have an atomic 64-bit type, so we
	171	* juggle 32-bit ints (and a float) to produce a time_t result
	172	* with minimal loss of information.) */
	173	long int vmstime[2],remainder,divisor = 100000;
	174	_ckvmssts(sys$gettim((unsigned long int *)vmstime));
	175	vmstime[1] &= 0x7fff; /* prevent overflow in EDIV */
	176	_ckvmssts(lib$ediv(&divisor,vmstime,(long int *)&retval,&remainder));
	177	# endif
	178	/* Fill in the struct tms using the CRTL routine . . .*/
	179	times((tbuffer_t *)t);
	180	return (clock_t) retval;
	181	# else /* !VMS && !OS2 */
	182	return times(t);
	183	# endif
	184	#endif
	185	}
583a019e	186
583a019e	187	static void
146174a9	188	prof_dumpa(pTHX_ opcode ptype, U32 id)
583a019e	189	{
146174a9	190	if (ptype == OP_LEAVESUB) {
	191	PerlIO_printf(g_fp,"- %"UVxf"\n", (UV)id);
	192	}
	193	else if(ptype == OP_ENTERSUB) {
	194	PerlIO_printf(g_fp,"+ %"UVxf"\n", (UV)id);
	195	}
	196	else if(ptype == OP_GOTO) {
	197	PerlIO_printf(g_fp,"* %"UVxf"\n", (UV)id);
	198	}
	199	else if(ptype == OP_DIE) {
	200	PerlIO_printf(g_fp,"/ %"UVxf"\n", (UV)id);
	201	}
	202	else {
	203	PerlIO_printf(g_fp,"Profiler unknown prof code %d\n", ptype);
583a019e	204	}
	205	}
	206
	207	static void
146174a9	208	prof_dumps(pTHX_ U32 id, char pname, char gname)
583a019e	209	{
146174a9	210	PerlIO_printf(g_fp,"& %"UVxf" %s %s\n", (UV)id, pname, gname);
583a019e	211	}
583a019e	212
583a019e	213	static void
146174a9	214	prof_dumpt(pTHX_ long tms_utime, long tms_stime, long realtime)
583a019e	215	{
146174a9	216	PerlIO_printf(g_fp,"@ %ld %ld %ld\n", tms_utime, tms_stime, realtime);
583a019e	217	}
	218
	219	static void
146174a9	220	prof_dump_until(pTHX_ long ix)
583a019e	221	{
	222	long base = 0;
	223	struct tms t1, t2;
	224	clock_t realtime1, realtime2;
	225
	226	realtime1 = Times(&t1);
	227
146174a9	228	while (base < ix) {
146174a9	229	opcode ptype = g_profstack[base++].ptype;
583a019e	230	if (ptype == OP_TIME) {
146174a9	231	long tms_utime = g_profstack[base++].tms_utime;
	232	long tms_stime = g_profstack[base++].tms_stime;
	233	long realtime = g_profstack[base++].realtime;
	234
	235	prof_dumpt(aTHX_ tms_utime, tms_stime, realtime);
	236	}
	237	else if (ptype == OP_GV) {
	238	U32 id = g_profstack[base++].id;
	239	char *pname = g_profstack[base++].name;
	240	char *gname = g_profstack[base++].name;
	241
	242	prof_dumps(aTHX_ id, pname, gname);
	243	}
	244	else {
	245	U32 id = g_profstack[base++].id;
	246	prof_dumpa(aTHX_ ptype, id);
583a019e	247	}
583a019e	248	}
146174a9	249	PerlIO_flush(g_fp);
583a019e	250	realtime2 = Times(&t2);
	251	if (realtime2 != realtime1 \|\| t1.tms_utime != t2.tms_utime
	252	\|\| t1.tms_stime != t2.tms_stime) {
146174a9	253	g_wprof_r += realtime2 - realtime1;
	254	g_wprof_u += t2.tms_utime - t1.tms_utime;
	255	g_wprof_s += t2.tms_stime - t1.tms_stime;
	256
	257	PerlIO_printf(g_fp,"+ & Devel::DProf::write\n");
	258	PerlIO_printf(g_fp,"@ %"IVdf" %"IVdf" %"IVdf"\n",
	259	/* The (IV) casts are one possibility:
	260	* the Painfully Correct Way would be to
	261	* have Clock_t_f. */
	262	(IV)(t2.tms_utime - t1.tms_utime),
	263	(IV)(t2.tms_stime - t1.tms_stime),
	264	(IV)(realtime2 - realtime1));
	265	PerlIO_printf(g_fp,"- & Devel::DProf::write\n");
	266	g_otms_utime = t2.tms_utime;
	267	g_otms_stime = t2.tms_stime;
	268	g_orealtime = realtime2;
	269	PerlIO_flush(g_fp);
583a019e	270	}
	271	}
	272
583a019e	273	static void
146174a9	274	prof_mark(pTHX_ opcode ptype)
583a019e	275	{
146174a9	276	struct tms t;
	277	clock_t realtime, rdelta, udelta, sdelta;
	278	char name, pv;
	279	char *hvname;
	280	STRLEN len;
	281	SV *sv;
	282	U32 id;
	283	SV Sub = GvSV(PL_DBsub); / name of current sub */
	284
	285	if (g_SAVE_STACK) {
	286	if (g_profstack_ix + 5 > g_profstack_max) {
	287	g_profstack_max = g_profstack_max * 3 / 2;
	288	Renew(g_profstack, g_profstack_max, PROFANY);
	289	}
	290	}
583a019e	291
146174a9	292	realtime = Times(&t);
	293	rdelta = realtime - g_orealtime;
	294	udelta = t.tms_utime - g_otms_utime;
	295	sdelta = t.tms_stime - g_otms_stime;
	296	if (rdelta \|\| udelta \|\| sdelta) {
	297	if (g_SAVE_STACK) {
	298	g_profstack[g_profstack_ix++].ptype = OP_TIME;
	299	g_profstack[g_profstack_ix++].tms_utime = udelta;
	300	g_profstack[g_profstack_ix++].tms_stime = sdelta;
	301	g_profstack[g_profstack_ix++].realtime = rdelta;
	302	}
	303	else { /* Write it to disk now so's not to eat up core */
	304	if (g_prof_pid == (int)getpid()) {
	305	prof_dumpt(aTHX_ udelta, sdelta, rdelta);
	306	PerlIO_flush(g_fp);
583a019e	307	}
583a019e	308	}
146174a9	309	g_orealtime = realtime;
	310	g_otms_stime = t.tms_stime;
	311	g_otms_utime = t.tms_utime;
	312	}
583a019e	313
146174a9	314	{
	315	SV **svp;
	316	char gname, pname;
	317	CV *cv;
	318
	319	cv = INT2PTR(CV*,SvIVX(Sub));
	320	svp = hv_fetch(g_cv_hash, (char)&cv, sizeof(CV), TRUE);
	321	if (!SvOK(*svp)) {
	322	GV *gv = CvGV(cv);
	323
	324	sv_setiv(*svp, id = ++g_lastid);
	325	pname = ((GvSTASH(gv) && HvNAME(GvSTASH(gv)))
	326	? HvNAME(GvSTASH(gv))
	327	: "(null)");
	328	gname = GvNAME(gv);
	329	if (CvXSUB(cv) == XS_Devel__DProf_END)
	330	return;
	331	if (g_SAVE_STACK) { /* Store it for later recording -JH */
	332	g_profstack[g_profstack_ix++].ptype = OP_GV;
	333	g_profstack[g_profstack_ix++].id = id;
	334	g_profstack[g_profstack_ix++].name = pname;
	335	g_profstack[g_profstack_ix++].name = gname;
	336	}
	337	else { /* Write it to disk now so's not to eat up core */
	338	/* Only record the parent's info */
	339	if (g_prof_pid == (int)getpid()) {
	340	prof_dumps(aTHX_ id, pname, gname);
	341	PerlIO_flush(g_fp);
583a019e	342	}
146174a9	343	else
146174a9	344	PL_perldb = 0; /* Do not debug the kid. */
583a019e	345	}
583a019e	346	}
146174a9	347	else {
	348	id = SvIV(*svp);
	349	}
	350	}
583a019e	351
146174a9	352	g_total++;
	353	if (g_SAVE_STACK) { /* Store it for later recording -JH */
	354	g_profstack[g_profstack_ix++].ptype = ptype;
	355	g_profstack[g_profstack_ix++].id = id;
	356
	357	/* Only record the parent's info */
	358	if (g_SAVE_STACK < g_profstack_ix) {
	359	if (g_prof_pid == (int)getpid())
	360	prof_dump_until(aTHX_ g_profstack_ix);
	361	else
	362	PL_perldb = 0; /* Do not debug the kid. */
	363	g_profstack_ix = 0;
	364	}
	365	}
	366	else { /* Write it to disk now so's not to eat up core */
583a019e	367
146174a9	368	/* Only record the parent's info */
	369	if (g_prof_pid == (int)getpid()) {
	370	prof_dumpa(aTHX_ ptype, id);
	371	PerlIO_flush(g_fp);
	372	}
	373	else
	374	PL_perldb = 0; /* Do not debug the kid. */
	375	}
583a019e	376	}
583a019e	377
583a019e	378	#ifdef PL_NEEDED
	379	# define defstash PL_defstash
	380	#endif
	381
	382	/* Counts overhead of prof_mark and extra XS call. */
	383	static void
146174a9	384	test_time(pTHX_ clock_t r, clock_t u, clock_t *s)
583a019e	385	{
583a019e	386	CV *cv = perl_get_cv("Devel::DProf::NONESUCH_noxs", FALSE);
583a019e	387	int i, j, k = 0;
146174a9	388	HV *oldstash = PL_curstash;
583a019e	389	struct tms t1, t2;
583a019e	390	clock_t realtime1, realtime2;
146174a9	391	U32 ototal = g_total;
	392	U32 ostack = g_SAVE_STACK;
	393	U32 operldb = PL_perldb;
583a019e	394
146174a9	395	g_SAVE_STACK = 1000000;
583a019e	396	realtime1 = Times(&t1);
	397
	398	while (k < 2) {
	399	i = 0;
	400	/* Disable debugging of perl_call_sv on second pass: */
146174a9	401	PL_curstash = (k == 0 ? PL_defstash : PL_debstash);
146174a9	402	PL_perldb = g_default_perldb;
583a019e	403	while (++i <= 100) {
583a019e	404	j = 0;
146174a9	405	g_profstack_ix = 0; /* Do not let the stack grow */
583a019e	406	while (++j <= 100) {
146174a9	407	/* prof_mark(aTHX_ OP_ENTERSUB); */
583a019e	408
146174a9	409	PUSHMARK(PL_stack_sp);
	410	perl_call_sv((SV*)cv, G_SCALAR);
	411	PL_stack_sp--;
	412	/* prof_mark(aTHX_ OP_LEAVESUB); */
583a019e	413	}
583a019e	414	}
146174a9	415	PL_curstash = oldstash;
583a019e	416	if (k == 0) { /* Put time with debugging */
	417	realtime2 = Times(&t2);
	418	*r = realtime2 - realtime1;
	419	*u = t2.tms_utime - t1.tms_utime;
	420	*s = t2.tms_stime - t1.tms_stime;
146174a9	421	}
146174a9	422	else { /* Subtract time without debug */
583a019e	423	realtime1 = Times(&t1);
	424	*r -= realtime1 - realtime2;
	425	*u -= t1.tms_utime - t2.tms_utime;
	426	*s -= t1.tms_stime - t2.tms_stime;
	427	}
	428	k++;
	429	}
146174a9	430	g_total = ototal;
	431	g_SAVE_STACK = ostack;
	432	PL_perldb = operldb;
583a019e	433	}
	434
	435	static void
146174a9	436	prof_recordheader(pTHX)
583a019e	437	{
146174a9	438	clock_t r, u, s;
	439
	440	/* g_fp is opened in the BOOT section */
	441	PerlIO_printf(g_fp, "#fOrTyTwO\n");
	442	PerlIO_printf(g_fp, "$hz=%"IVdf";\n", (IV)DPROF_HZ);
	443	PerlIO_printf(g_fp, "$XS_VERSION='DProf %s';\n", XS_VERSION);
	444	PerlIO_printf(g_fp, "# All values are given in HZ\n");
	445	test_time(aTHX_ &r, &u, &s);
	446	PerlIO_printf(g_fp,
	447	"$over_utime=%"IVdf"; $over_stime=%"IVdf"; $over_rtime=%"IVdf";\n",
	448	/* The (IV) casts are one possibility:
	449	* the Painfully Correct Way would be to
	450	* have Clock_t_f. */
	451	(IV)u, (IV)s, (IV)r);
	452	PerlIO_printf(g_fp, "$over_tests=10000;\n");
	453
	454	g_TIMES_LOCATION = PerlIO_tell(g_fp);
	455
	456	/* Pad with whitespace. */
	457	/* This should be enough even for very large numbers. */
	458	PerlIO_printf(g_fp, "%*s\n", 240 , "");
	459
	460	PerlIO_printf(g_fp, "\n");
	461	PerlIO_printf(g_fp, "PART2\n");
	462
	463	PerlIO_flush(g_fp);
583a019e	464	}
	465
	466	static void
146174a9	467	prof_record(pTHX)
583a019e	468	{
146174a9	469	/* g_fp is opened in the BOOT section */
	470
	471	/* Now that we know the runtimes, fill them in at the recorded
	472	location -JH */
583a019e	473
146174a9	474	clock_t r, u, s;
583a019e	475
146174a9	476	if (g_SAVE_STACK) {
	477	prof_dump_until(aTHX_ g_profstack_ix);
	478	}
	479	PerlIO_seek(g_fp, g_TIMES_LOCATION, SEEK_SET);
	480	/* Write into reserved 240 bytes: */
	481	PerlIO_printf(g_fp,
	482	"$rrun_utime=%"IVdf"; $rrun_stime=%"IVdf"; $rrun_rtime=%"IVdf";",
	483	/* The (IV) casts are one possibility:
	484	* the Painfully Correct Way would be to
	485	* have Clock_t_f. */
	486	(IV)(g_prof_end.tms_utime-g_prof_start.tms_utime-g_wprof_u),
	487	(IV)(g_prof_end.tms_stime-g_prof_start.tms_stime-g_wprof_s),
	488	(IV)(g_rprof_end-g_rprof_start-g_wprof_r));
	489	PerlIO_printf(g_fp, "\n$total_marks=%"IVdf, (IV)g_total);
583a019e	490
146174a9	491	PerlIO_close(g_fp);
583a019e	492	}
	493
	494	#define NONESUCH()
	495
583a019e	496	static void
d7b9cf63	497	check_depth(pTHX_ void *foo)
583a019e	498	{
4b19af01	499	U32 need_depth = PTR2UV(foo);
146174a9	500	if (need_depth != g_depth) {
146174a9	501	if (need_depth > g_depth) {
583a019e	502	warn("garbled call depth when profiling");
146174a9	503	}
	504	else {
	505	I32 marks = g_depth - need_depth;
583a019e	506
146174a9	507	/* warn("Check_depth: got %d, expected %d\n", g_depth, need_depth); */
583a019e	508	while (marks--) {
146174a9	509	prof_mark(aTHX_ OP_DIE);
583a019e	510	}
146174a9	511	g_depth = need_depth;
583a019e	512	}
	513	}
	514	}
	515
	516	#define for_real
	517	#ifdef for_real
	518
	519	XS(XS_DB_sub)
	520	{
146174a9	521	dXSARGS;
	522	dORIGMARK;
	523	SV Sub = GvSV(PL_DBsub); / name of current sub */
	524
	525	#ifdef PERL_IMPLICIT_CONTEXT
	526	/* profile only the interpreter that loaded us */
	527	if (g_THX != aTHX) {
	528	PUSHMARK(ORIGMARK);
	529	perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME \| G_NODEBUG);
	530	}
	531	else
	532	#endif
	533	{
	534	HV *oldstash = PL_curstash;
583a019e	535
cb50131a	536	DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV_nolen(Sub));
583a019e	537
146174a9	538	SAVEDESTRUCTOR_X(check_depth, (void*)g_depth);
146174a9	539	g_depth++;
583a019e	540
146174a9	541	prof_mark(aTHX_ OP_ENTERSUB);
	542	PUSHMARK(ORIGMARK);
	543	perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME \| G_NODEBUG);
	544	prof_mark(aTHX_ OP_LEAVESUB);
	545	g_depth--;
	546	}
	547	return;
583a019e	548	}
	549
	550	XS(XS_DB_goto)
	551	{
146174a9	552	#ifdef PERL_IMPLICIT_CONTEXT
	553	if (g_THX == aTHX)
	554	#endif
	555	{
	556	prof_mark(aTHX_ OP_GOTO);
583a019e	557	return;
146174a9	558	}
583a019e	559	}
	560
	561	#endif /* for_real */
	562
	563	#ifdef testing
	564
	565	MODULE = Devel::DProf PACKAGE = DB
	566
	567	void
	568	sub(...)
146174a9	569	PPCODE:
146174a9	570	{
583a019e	571	dORIGMARK;
146174a9	572	HV *oldstash = PL_curstash;
146174a9	573	SV Sub = GvSV(PL_DBsub); / name of current sub */
583a019e	574	/* SP -= items; added by xsubpp */
cb50131a	575	DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV_nolen(Sub));
583a019e	576
146174a9	577	sv_setiv(PL_DBsingle, 0); /* disable DB single-stepping */
583a019e	578
146174a9	579	prof_mark(aTHX_ OP_ENTERSUB);
146174a9	580	PUSHMARK(ORIGMARK);
583a019e	581
146174a9	582	PL_curstash = PL_debstash; /* To disable debugging of perl_call_sv */
	583	perl_call_sv(Sub, GIMME);
	584	PL_curstash = oldstash;
583a019e	585
146174a9	586	prof_mark(aTHX_ OP_LEAVESUB);
583a019e	587	SPAGAIN;
583a019e	588	/* PUTBACK; added by xsubpp */
146174a9	589	}
583a019e	590
	591	#endif /* testing */
	592
	593	MODULE = Devel::DProf PACKAGE = Devel::DProf
	594
	595	void
	596	END()
146174a9	597	PPCODE:
	598	{
	599	if (PL_DBsub) {
	600	/* maybe the process forked--we want only
	601	* the parent's profile.
	602	*/
	603	if (
	604	#ifdef PERL_IMPLICIT_CONTEXT
	605	g_THX == aTHX &&
	606	#endif
	607	g_prof_pid == (int)getpid())
	608	{
	609	g_rprof_end = Times(&g_prof_end);
	610	DBG_TIMER_NOTIFY("Profiler timer is off.\n");
	611	prof_record(aTHX);
	612	}
	613	}
	614	}
583a019e	615
	616	void
	617	NONESUCH()
	618
	619	BOOT:
146174a9	620	{
	621	g_TIMES_LOCATION = 42;
	622	g_SAVE_STACK = 1<<14;
	623	g_profstack_max = 128;
	624	#ifdef PERL_IMPLICIT_CONTEXT
	625	g_THX = aTHX;
	626	#endif
	627
583a019e	628	/* Before we go anywhere make sure we were invoked
	629	* properly, else we'll dump core.
	630	*/
146174a9	631	if (!PL_DBsub)
146174a9	632	croak("DProf: run perl with -d to use DProf.\n");
583a019e	633
	634	/* When we hook up the XS DB::sub we'll be redefining
	635	* the DB::sub from the PM file. Turn off warnings
	636	* while we do this.
	637	*/
	638	{
146174a9	639	I32 warn_tmp = PL_dowarn;
	640	PL_dowarn = 0;
	641	newXS("DB::sub", XS_DB_sub, file);
	642	newXS("DB::goto", XS_DB_goto, file);
	643	PL_dowarn = warn_tmp;
583a019e	644	}
583a019e	645
146174a9	646	sv_setiv(PL_DBsingle, 0); /* disable DB single-stepping */
583a019e	647
	648	{
	649	char *buffer = getenv("PERL_DPROF_BUFFER");
	650
	651	if (buffer) {
146174a9	652	g_SAVE_STACK = atoi(buffer);
583a019e	653	}
	654
	655	buffer = getenv("PERL_DPROF_TICKS");
	656
	657	if (buffer) {
146174a9	658	g_dprof_ticks = atoi(buffer); /* Used under OS/2 only */
	659	}
	660	else {
	661	g_dprof_ticks = HZ;
583a019e	662	}
583a019e	663
146174a9	664	buffer = getenv("PERL_DPROF_OUT_FILE_NAME");
	665	g_out_file_name = savepv(buffer ? buffer : "tmon.out");
	666	}
583a019e	667
146174a9	668	if ((g_fp = PerlIO_open(g_out_file_name, "w")) == NULL)
	669	croak("DProf: unable to write '%s', errno = %d\n",
	670	g_out_file_name, errno);
583a019e	671
146174a9	672	g_default_perldb = PERLDBf_NONAME \| PERLDBf_SUB \| PERLDBf_GOTO;
	673	g_cv_hash = newHV();
	674	g_prof_pid = (int)getpid();
583a019e	675
146174a9	676	New(0, g_profstack, g_profstack_max, PROFANY);
146174a9	677	prof_recordheader(aTHX);
583a019e	678	DBG_TIMER_NOTIFY("Profiler timer is on.\n");
146174a9	679	g_orealtime = g_rprof_start = Times(&g_prof_start);
	680	g_otms_utime = g_prof_start.tms_utime;
	681	g_otms_stime = g_prof_start.tms_stime;
	682	PL_perldb = g_default_perldb;
	683	}