[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"

/* For older Perls */
#ifndef dTHR
#  define dTHR int dummy_thr
#endif	/* dTHR */ 

/*#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;
    
    if (!g_frequ) {
	if (CheckOSError(DosTmrQueryFreq(&g_frequ)))
	    croak("DosTmrQueryFreq: %s", SvPV(perl_get_sv("!",TRUE),na));
	else
	    g_frequ = g_frequ/DPROF_HZ;	/* count per tick */
	if (CheckOSError(DosTmrQueryTime(&cnt)))
	    croak("DosTmrQueryTime: %s",
		  SvPV(perl_get_sv("!",TRUE),na));
	g_start_cnt = toLongLong(cnt);
    }

    if (CheckOSError(DosTmrQueryTime(&cnt)))
	    croak("DosTmrQueryTime: %s", SvPV(perl_get_sv("!",TRUE),na));
    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)
{
    dTHR;
    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 = (U32)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(Sub, na));

	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(Sub, na));

                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
	6	/* For older Perls */
	7	#ifndef dTHR
	8	# define dTHR int dummy_thr
	9	#endif /* dTHR */
	10
7399586d	11	/#define DBG_SUB 1 /
7399586d	12	/#define DBG_TIMER 1 /
583a019e	13
583a019e	14	#ifdef DBG_SUB
146174a9	15	# define DBG_SUB_NOTIFY(A,B) warn(A, B)
583a019e	16	#else
	17	# define DBG_SUB_NOTIFY(A,B) /* nothing */
	18	#endif
	19
	20	#ifdef DBG_TIMER
146174a9	21	# define DBG_TIMER_NOTIFY(A) warn(A)
583a019e	22	#else
	23	# define DBG_TIMER_NOTIFY(A) /* nothing */
	24	#endif
	25
583a019e	26	/* HZ == clock ticks per second */
583a019e	27	#ifdef VMS
552e38a9	28	# define HZ ((I32)CLK_TCK)
583a019e	29	# define DPROF_HZ HZ
583a019e	30	# include <starlet.h> /* prototype for sys$gettim() */
146174a9	31	# define Times(ptr) (dprof_times(aTHX_ ptr))
583a019e	32	#else
	33	# ifndef HZ
	34	# ifdef CLK_TCK
552e38a9	35	# define HZ ((I32)CLK_TCK)
583a019e	36	# else
	37	# define HZ 60
	38	# endif
	39	# endif
	40	# ifdef OS2 /* times() has significant overhead */
146174a9	41	# define Times(ptr) (dprof_times(aTHX_ ptr))
583a019e	42	# define INCL_DOSPROFILE
	43	# define INCL_DOSERRORS
	44	# include <os2.h>
	45	# define toLongLong(arg) ((long long)&(arg))
146174a9	46	# define DPROF_HZ g_dprof_ticks
583a019e	47	# else
	48	# define Times(ptr) (times(ptr))
	49	# define DPROF_HZ HZ
	50	# endif
	51	#endif
	52
	53	XS(XS_Devel__DProf_END); /* used by prof_mark() */
	54
583a019e	55	/* Everything is built on times(2). See its manpage for a description
	56	* of the timings.
	57	*/
	58
583a019e	59	union prof_any {
	60	clock_t tms_utime; /* cpu time spent in user space */
	61	clock_t tms_stime; /* cpu time spent in system */
	62	clock_t realtime; /* elapsed real time, in ticks */
	63	char *name;
	64	U32 id;
	65	opcode ptype;
	66	};
	67
	68	typedef union prof_any PROFANY;
	69
146174a9	70	typedef struct {
	71	U32 dprof_ticks;
	72	char* out_file_name; /* output file (defaults to tmon.out) */
	73	PerlIO* fp; /* pointer to tmon.out file */
	74	long TIMES_LOCATION; /* Where in the file to store the time totals */
	75	int SAVE_STACK; /* How much data to buffer until end of run */
	76	int prof_pid; /* pid of profiled process */
	77	struct tms prof_start;
	78	struct tms prof_end;
	79	clock_t rprof_start; /* elapsed real time ticks */
	80	clock_t rprof_end;
	81	clock_t wprof_u;
	82	clock_t wprof_s;
	83	clock_t wprof_r;
	84	clock_t otms_utime;
	85	clock_t otms_stime;
	86	clock_t orealtime;
	87	PROFANY* profstack;
	88	int profstack_max;
	89	int profstack_ix;
	90	HV* cv_hash;
	91	U32 total;
	92	U32 lastid;
	93	U32 default_perldb;
	94	U32 depth;
	95	#ifdef OS2
	96	ULONG frequ;
	97	long long start_cnt;
	98	#endif
	99	#ifdef PERL_IMPLICIT_CONTEXT
	100	# define register
	101	pTHX;
	102	# undef register
	103	#endif
	104	} prof_state_t;
	105
	106	prof_state_t g_prof_state;
	107
	108	#define g_dprof_ticks g_prof_state.dprof_ticks
	109	#define g_out_file_name g_prof_state.out_file_name
	110	#define g_fp g_prof_state.fp
	111	#define g_TIMES_LOCATION g_prof_state.TIMES_LOCATION
	112	#define g_SAVE_STACK g_prof_state.SAVE_STACK
	113	#define g_prof_pid g_prof_state.prof_pid
	114	#define g_prof_start g_prof_state.prof_start
	115	#define g_prof_end g_prof_state.prof_end
	116	#define g_rprof_start g_prof_state.rprof_start
	117	#define g_rprof_end g_prof_state.rprof_end
	118	#define g_wprof_u g_prof_state.wprof_u
	119	#define g_wprof_s g_prof_state.wprof_s
	120	#define g_wprof_r g_prof_state.wprof_r
	121	#define g_otms_utime g_prof_state.otms_utime
	122	#define g_otms_stime g_prof_state.otms_stime
	123	#define g_orealtime g_prof_state.orealtime
	124	#define g_profstack g_prof_state.profstack
	125	#define g_profstack_max g_prof_state.profstack_max
	126	#define g_profstack_ix g_prof_state.profstack_ix
	127	#define g_cv_hash g_prof_state.cv_hash
	128	#define g_total g_prof_state.total
	129	#define g_lastid g_prof_state.lastid
	130	#define g_default_perldb g_prof_state.default_perldb
	131	#define g_depth g_prof_state.depth
	132	#ifdef PERL_IMPLICIT_CONTEXT
	133	# define g_THX g_prof_state.aTHX
134	#endif
135	#ifdef OS2
136	# define g_frequ g_prof_state.frequ
137	# define g_start_cnt g_prof_state.start_cnt
138	#endif
583a019e	139
146174a9	140	clock_t
146174a9	141	dprof_times(pTHX_ struct tms *t)
583a019e	142	{
146174a9	143	#ifdef OS2
	144	ULONG rc;
	145	QWORD cnt;
	146
	147	if (!g_frequ) {
	148	if (CheckOSError(DosTmrQueryFreq(&g_frequ)))
	149	croak("DosTmrQueryFreq: %s", SvPV(perl_get_sv("!",TRUE),na));
	150	else
	151	g_frequ = g_frequ/DPROF_HZ; /* count per tick */
	152	if (CheckOSError(DosTmrQueryTime(&cnt)))
	153	croak("DosTmrQueryTime: %s",
	154	SvPV(perl_get_sv("!",TRUE),na));
	155	g_start_cnt = toLongLong(cnt);
583a019e	156	}
146174a9	157
	158	if (CheckOSError(DosTmrQueryTime(&cnt)))
	159	croak("DosTmrQueryTime: %s", SvPV(perl_get_sv("!",TRUE),na));
	160	t->tms_stime = 0;
	161	return (t->tms_utime = (toLongLong(cnt) - g_start_cnt)/g_frequ);
	162	#else /* !OS2 */
	163	# ifdef VMS
	164	clock_t retval;
	165	/* Get wall time and convert to 10 ms intervals to
	166	* produce the return value dprof expects */
	167	# if defined(__DECC) && defined (__ALPHA)
	168	# include <ints.h>
	169	uint64 vmstime;
	170	_ckvmssts(sys$gettim(&vmstime));
	171	vmstime /= 100000;
	172	retval = vmstime & 0x7fffffff;
	173	# else
	174	/* (Older hw or ccs don't have an atomic 64-bit type, so we
	175	* juggle 32-bit ints (and a float) to produce a time_t result
	176	* with minimal loss of information.) */
	177	long int vmstime[2],remainder,divisor = 100000;
	178	_ckvmssts(sys$gettim((unsigned long int *)vmstime));
	179	vmstime[1] &= 0x7fff; /* prevent overflow in EDIV */
	180	_ckvmssts(lib$ediv(&divisor,vmstime,(long int *)&retval,&remainder));
	181	# endif
	182	/* Fill in the struct tms using the CRTL routine . . .*/
	183	times((tbuffer_t *)t);
	184	return (clock_t) retval;
	185	# else /* !VMS && !OS2 */
	186	return times(t);
	187	# endif
	188	#endif
	189	}
583a019e	190
583a019e	191	static void
146174a9	192	prof_dumpa(pTHX_ opcode ptype, U32 id)
583a019e	193	{
146174a9	194	if (ptype == OP_LEAVESUB) {
	195	PerlIO_printf(g_fp,"- %"UVxf"\n", (UV)id);
	196	}
	197	else if(ptype == OP_ENTERSUB) {
	198	PerlIO_printf(g_fp,"+ %"UVxf"\n", (UV)id);
	199	}
	200	else if(ptype == OP_GOTO) {
	201	PerlIO_printf(g_fp,"* %"UVxf"\n", (UV)id);
	202	}
	203	else if(ptype == OP_DIE) {
	204	PerlIO_printf(g_fp,"/ %"UVxf"\n", (UV)id);
	205	}
	206	else {
	207	PerlIO_printf(g_fp,"Profiler unknown prof code %d\n", ptype);
583a019e	208	}
	209	}
	210
	211	static void
146174a9	212	prof_dumps(pTHX_ U32 id, char pname, char gname)
583a019e	213	{
146174a9	214	PerlIO_printf(g_fp,"& %"UVxf" %s %s\n", (UV)id, pname, gname);
583a019e	215	}
583a019e	216
583a019e	217	static void
146174a9	218	prof_dumpt(pTHX_ long tms_utime, long tms_stime, long realtime)
583a019e	219	{
146174a9	220	PerlIO_printf(g_fp,"@ %ld %ld %ld\n", tms_utime, tms_stime, realtime);
583a019e	221	}
	222
	223	static void
146174a9	224	prof_dump_until(pTHX_ long ix)
583a019e	225	{
	226	long base = 0;
	227	struct tms t1, t2;
	228	clock_t realtime1, realtime2;
	229
	230	realtime1 = Times(&t1);
	231
146174a9	232	while (base < ix) {
146174a9	233	opcode ptype = g_profstack[base++].ptype;
583a019e	234	if (ptype == OP_TIME) {
146174a9	235	long tms_utime = g_profstack[base++].tms_utime;
	236	long tms_stime = g_profstack[base++].tms_stime;
	237	long realtime = g_profstack[base++].realtime;
	238
	239	prof_dumpt(aTHX_ tms_utime, tms_stime, realtime);
	240	}
	241	else if (ptype == OP_GV) {
	242	U32 id = g_profstack[base++].id;
	243	char *pname = g_profstack[base++].name;
	244	char *gname = g_profstack[base++].name;
	245
	246	prof_dumps(aTHX_ id, pname, gname);
	247	}
	248	else {
	249	U32 id = g_profstack[base++].id;
	250	prof_dumpa(aTHX_ ptype, id);
583a019e	251	}
583a019e	252	}
146174a9	253	PerlIO_flush(g_fp);
583a019e	254	realtime2 = Times(&t2);
	255	if (realtime2 != realtime1 \|\| t1.tms_utime != t2.tms_utime
	256	\|\| t1.tms_stime != t2.tms_stime) {
146174a9	257	g_wprof_r += realtime2 - realtime1;
	258	g_wprof_u += t2.tms_utime - t1.tms_utime;
	259	g_wprof_s += t2.tms_stime - t1.tms_stime;
	260
	261	PerlIO_printf(g_fp,"+ & Devel::DProf::write\n");
	262	PerlIO_printf(g_fp,"@ %"IVdf" %"IVdf" %"IVdf"\n",
	263	/* The (IV) casts are one possibility:
	264	* the Painfully Correct Way would be to
	265	* have Clock_t_f. */
	266	(IV)(t2.tms_utime - t1.tms_utime),
	267	(IV)(t2.tms_stime - t1.tms_stime),
	268	(IV)(realtime2 - realtime1));
	269	PerlIO_printf(g_fp,"- & Devel::DProf::write\n");
	270	g_otms_utime = t2.tms_utime;
	271	g_otms_stime = t2.tms_stime;
	272	g_orealtime = realtime2;
	273	PerlIO_flush(g_fp);
583a019e	274	}
	275	}
	276
583a019e	277	static void
146174a9	278	prof_mark(pTHX_ opcode ptype)
583a019e	279	{
146174a9	280	struct tms t;
	281	clock_t realtime, rdelta, udelta, sdelta;
	282	char name, pv;
	283	char *hvname;
	284	STRLEN len;
	285	SV *sv;
	286	U32 id;
	287	SV Sub = GvSV(PL_DBsub); / name of current sub */
	288
	289	if (g_SAVE_STACK) {
	290	if (g_profstack_ix + 5 > g_profstack_max) {
	291	g_profstack_max = g_profstack_max * 3 / 2;
	292	Renew(g_profstack, g_profstack_max, PROFANY);
	293	}
	294	}
583a019e	295
146174a9	296	realtime = Times(&t);
	297	rdelta = realtime - g_orealtime;
	298	udelta = t.tms_utime - g_otms_utime;
	299	sdelta = t.tms_stime - g_otms_stime;
	300	if (rdelta \|\| udelta \|\| sdelta) {
	301	if (g_SAVE_STACK) {
	302	g_profstack[g_profstack_ix++].ptype = OP_TIME;
	303	g_profstack[g_profstack_ix++].tms_utime = udelta;
	304	g_profstack[g_profstack_ix++].tms_stime = sdelta;
	305	g_profstack[g_profstack_ix++].realtime = rdelta;
	306	}
	307	else { /* Write it to disk now so's not to eat up core */
	308	if (g_prof_pid == (int)getpid()) {
	309	prof_dumpt(aTHX_ udelta, sdelta, rdelta);
	310	PerlIO_flush(g_fp);
583a019e	311	}
583a019e	312	}
146174a9	313	g_orealtime = realtime;
	314	g_otms_stime = t.tms_stime;
	315	g_otms_utime = t.tms_utime;
	316	}
583a019e	317
146174a9	318	{
	319	SV **svp;
	320	char gname, pname;
	321	CV *cv;
	322
	323	cv = INT2PTR(CV*,SvIVX(Sub));
	324	svp = hv_fetch(g_cv_hash, (char)&cv, sizeof(CV), TRUE);
	325	if (!SvOK(*svp)) {
	326	GV *gv = CvGV(cv);
	327
	328	sv_setiv(*svp, id = ++g_lastid);
	329	pname = ((GvSTASH(gv) && HvNAME(GvSTASH(gv)))
	330	? HvNAME(GvSTASH(gv))
	331	: "(null)");
	332	gname = GvNAME(gv);
	333	if (CvXSUB(cv) == XS_Devel__DProf_END)
	334	return;
	335	if (g_SAVE_STACK) { /* Store it for later recording -JH */
	336	g_profstack[g_profstack_ix++].ptype = OP_GV;
	337	g_profstack[g_profstack_ix++].id = id;
	338	g_profstack[g_profstack_ix++].name = pname;
	339	g_profstack[g_profstack_ix++].name = gname;
	340	}
	341	else { /* Write it to disk now so's not to eat up core */
	342	/* Only record the parent's info */
	343	if (g_prof_pid == (int)getpid()) {
	344	prof_dumps(aTHX_ id, pname, gname);
	345	PerlIO_flush(g_fp);
583a019e	346	}
146174a9	347	else
146174a9	348	PL_perldb = 0; /* Do not debug the kid. */
583a019e	349	}
583a019e	350	}
146174a9	351	else {
	352	id = SvIV(*svp);
	353	}
	354	}
583a019e	355
146174a9	356	g_total++;
	357	if (g_SAVE_STACK) { /* Store it for later recording -JH */
	358	g_profstack[g_profstack_ix++].ptype = ptype;
	359	g_profstack[g_profstack_ix++].id = id;
	360
	361	/* Only record the parent's info */
	362	if (g_SAVE_STACK < g_profstack_ix) {
	363	if (g_prof_pid == (int)getpid())
	364	prof_dump_until(aTHX_ g_profstack_ix);
	365	else
	366	PL_perldb = 0; /* Do not debug the kid. */
	367	g_profstack_ix = 0;
	368	}
	369	}
	370	else { /* Write it to disk now so's not to eat up core */
583a019e	371
146174a9	372	/* Only record the parent's info */
	373	if (g_prof_pid == (int)getpid()) {
	374	prof_dumpa(aTHX_ ptype, id);
	375	PerlIO_flush(g_fp);
	376	}
	377	else
	378	PL_perldb = 0; /* Do not debug the kid. */
	379	}
583a019e	380	}
583a019e	381
583a019e	382	#ifdef PL_NEEDED
	383	# define defstash PL_defstash
	384	#endif
	385
	386	/* Counts overhead of prof_mark and extra XS call. */
	387	static void
146174a9	388	test_time(pTHX_ clock_t r, clock_t u, clock_t *s)
583a019e	389	{
	390	dTHR;
	391	CV *cv = perl_get_cv("Devel::DProf::NONESUCH_noxs", FALSE);
	392	int i, j, k = 0;
146174a9	393	HV *oldstash = PL_curstash;
583a019e	394	struct tms t1, t2;
583a019e	395	clock_t realtime1, realtime2;
146174a9	396	U32 ototal = g_total;
	397	U32 ostack = g_SAVE_STACK;
	398	U32 operldb = PL_perldb;
583a019e	399
146174a9	400	g_SAVE_STACK = 1000000;
583a019e	401	realtime1 = Times(&t1);
	402
	403	while (k < 2) {
	404	i = 0;
	405	/* Disable debugging of perl_call_sv on second pass: */
146174a9	406	PL_curstash = (k == 0 ? PL_defstash : PL_debstash);
146174a9	407	PL_perldb = g_default_perldb;
583a019e	408	while (++i <= 100) {
583a019e	409	j = 0;
146174a9	410	g_profstack_ix = 0; /* Do not let the stack grow */
583a019e	411	while (++j <= 100) {
146174a9	412	/* prof_mark(aTHX_ OP_ENTERSUB); */
583a019e	413
146174a9	414	PUSHMARK(PL_stack_sp);
	415	perl_call_sv((SV*)cv, G_SCALAR);
	416	PL_stack_sp--;
	417	/* prof_mark(aTHX_ OP_LEAVESUB); */
583a019e	418	}
583a019e	419	}
146174a9	420	PL_curstash = oldstash;
583a019e	421	if (k == 0) { /* Put time with debugging */
	422	realtime2 = Times(&t2);
	423	*r = realtime2 - realtime1;
	424	*u = t2.tms_utime - t1.tms_utime;
	425	*s = t2.tms_stime - t1.tms_stime;
146174a9	426	}
146174a9	427	else { /* Subtract time without debug */
583a019e	428	realtime1 = Times(&t1);
	429	*r -= realtime1 - realtime2;
	430	*u -= t1.tms_utime - t2.tms_utime;
	431	*s -= t1.tms_stime - t2.tms_stime;
	432	}
	433	k++;
	434	}
146174a9	435	g_total = ototal;
	436	g_SAVE_STACK = ostack;
	437	PL_perldb = operldb;
583a019e	438	}
	439
	440	static void
146174a9	441	prof_recordheader(pTHX)
583a019e	442	{
146174a9	443	clock_t r, u, s;
	444
	445	/* g_fp is opened in the BOOT section */
	446	PerlIO_printf(g_fp, "#fOrTyTwO\n");
	447	PerlIO_printf(g_fp, "$hz=%"IVdf";\n", (IV)DPROF_HZ);
	448	PerlIO_printf(g_fp, "$XS_VERSION='DProf %s';\n", XS_VERSION);
	449	PerlIO_printf(g_fp, "# All values are given in HZ\n");
	450	test_time(aTHX_ &r, &u, &s);
	451	PerlIO_printf(g_fp,
	452	"$over_utime=%"IVdf"; $over_stime=%"IVdf"; $over_rtime=%"IVdf";\n",
	453	/* The (IV) casts are one possibility:
	454	* the Painfully Correct Way would be to
	455	* have Clock_t_f. */
	456	(IV)u, (IV)s, (IV)r);
	457	PerlIO_printf(g_fp, "$over_tests=10000;\n");
	458
	459	g_TIMES_LOCATION = PerlIO_tell(g_fp);
	460
	461	/* Pad with whitespace. */
	462	/* This should be enough even for very large numbers. */
	463	PerlIO_printf(g_fp, "%*s\n", 240 , "");
	464
	465	PerlIO_printf(g_fp, "\n");
	466	PerlIO_printf(g_fp, "PART2\n");
	467
	468	PerlIO_flush(g_fp);
583a019e	469	}
	470
	471	static void
146174a9	472	prof_record(pTHX)
583a019e	473	{
146174a9	474	/* g_fp is opened in the BOOT section */
	475
	476	/* Now that we know the runtimes, fill them in at the recorded
	477	location -JH */
583a019e	478
146174a9	479	clock_t r, u, s;
583a019e	480
146174a9	481	if (g_SAVE_STACK) {
	482	prof_dump_until(aTHX_ g_profstack_ix);
	483	}
	484	PerlIO_seek(g_fp, g_TIMES_LOCATION, SEEK_SET);
	485	/* Write into reserved 240 bytes: */
	486	PerlIO_printf(g_fp,
	487	"$rrun_utime=%"IVdf"; $rrun_stime=%"IVdf"; $rrun_rtime=%"IVdf";",
	488	/* The (IV) casts are one possibility:
	489	* the Painfully Correct Way would be to
	490	* have Clock_t_f. */
	491	(IV)(g_prof_end.tms_utime-g_prof_start.tms_utime-g_wprof_u),
	492	(IV)(g_prof_end.tms_stime-g_prof_start.tms_stime-g_wprof_s),
	493	(IV)(g_rprof_end-g_rprof_start-g_wprof_r));
	494	PerlIO_printf(g_fp, "\n$total_marks=%"IVdf, (IV)g_total);
583a019e	495
146174a9	496	PerlIO_close(g_fp);
583a019e	497	}
	498
	499	#define NONESUCH()
	500
583a019e	501	static void
d7b9cf63	502	check_depth(pTHX_ void *foo)
583a019e	503	{
583a019e	504	U32 need_depth = (U32)foo;
146174a9	505	if (need_depth != g_depth) {
146174a9	506	if (need_depth > g_depth) {
583a019e	507	warn("garbled call depth when profiling");
146174a9	508	}
	509	else {
	510	I32 marks = g_depth - need_depth;
583a019e	511
146174a9	512	/* warn("Check_depth: got %d, expected %d\n", g_depth, need_depth); */
583a019e	513	while (marks--) {
146174a9	514	prof_mark(aTHX_ OP_DIE);
583a019e	515	}
146174a9	516	g_depth = need_depth;
583a019e	517	}
	518	}
	519	}
	520
	521	#define for_real
	522	#ifdef for_real
	523
	524	XS(XS_DB_sub)
	525	{
146174a9	526	dXSARGS;
	527	dORIGMARK;
	528	SV Sub = GvSV(PL_DBsub); / name of current sub */
	529
	530	#ifdef PERL_IMPLICIT_CONTEXT
	531	/* profile only the interpreter that loaded us */
	532	if (g_THX != aTHX) {
	533	PUSHMARK(ORIGMARK);
	534	perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME \| G_NODEBUG);
	535	}
	536	else
	537	#endif
	538	{
	539	HV *oldstash = PL_curstash;
583a019e	540
146174a9	541	DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV(Sub, na));
583a019e	542
146174a9	543	SAVEDESTRUCTOR_X(check_depth, (void*)g_depth);
146174a9	544	g_depth++;
583a019e	545
146174a9	546	prof_mark(aTHX_ OP_ENTERSUB);
	547	PUSHMARK(ORIGMARK);
	548	perl_call_sv(INT2PTR(SV*,SvIV(Sub)), GIMME \| G_NODEBUG);
	549	prof_mark(aTHX_ OP_LEAVESUB);
	550	g_depth--;
	551	}
	552	return;
583a019e	553	}
	554
	555	XS(XS_DB_goto)
	556	{
146174a9	557	#ifdef PERL_IMPLICIT_CONTEXT
	558	if (g_THX == aTHX)
	559	#endif
	560	{
	561	prof_mark(aTHX_ OP_GOTO);
583a019e	562	return;
146174a9	563	}
583a019e	564	}
	565
	566	#endif /* for_real */
	567
	568	#ifdef testing
	569
	570	MODULE = Devel::DProf PACKAGE = DB
	571
	572	void
	573	sub(...)
146174a9	574	PPCODE:
146174a9	575	{
583a019e	576	dORIGMARK;
146174a9	577	HV *oldstash = PL_curstash;
146174a9	578	SV Sub = GvSV(PL_DBsub); / name of current sub */
583a019e	579	/* SP -= items; added by xsubpp */
146174a9	580	DBG_SUB_NOTIFY("XS DBsub(%s)\n", SvPV(Sub, na));
583a019e	581
146174a9	582	sv_setiv(PL_DBsingle, 0); /* disable DB single-stepping */
583a019e	583
146174a9	584	prof_mark(aTHX_ OP_ENTERSUB);
146174a9	585	PUSHMARK(ORIGMARK);
583a019e	586
146174a9	587	PL_curstash = PL_debstash; /* To disable debugging of perl_call_sv */
	588	perl_call_sv(Sub, GIMME);
	589	PL_curstash = oldstash;
583a019e	590
146174a9	591	prof_mark(aTHX_ OP_LEAVESUB);
583a019e	592	SPAGAIN;
583a019e	593	/* PUTBACK; added by xsubpp */
146174a9	594	}
583a019e	595
	596	#endif /* testing */
	597
	598	MODULE = Devel::DProf PACKAGE = Devel::DProf
	599
	600	void
	601	END()
146174a9	602	PPCODE:
	603	{
	604	if (PL_DBsub) {
	605	/* maybe the process forked--we want only
	606	* the parent's profile.
	607	*/
	608	if (
	609	#ifdef PERL_IMPLICIT_CONTEXT
	610	g_THX == aTHX &&
	611	#endif
	612	g_prof_pid == (int)getpid())
	613	{
	614	g_rprof_end = Times(&g_prof_end);
	615	DBG_TIMER_NOTIFY("Profiler timer is off.\n");
	616	prof_record(aTHX);
	617	}
	618	}
	619	}
583a019e	620
	621	void
	622	NONESUCH()
	623
	624	BOOT:
146174a9	625	{
	626	g_TIMES_LOCATION = 42;
	627	g_SAVE_STACK = 1<<14;
	628	g_profstack_max = 128;
	629	#ifdef PERL_IMPLICIT_CONTEXT
	630	g_THX = aTHX;
	631	#endif
	632
583a019e	633	/* Before we go anywhere make sure we were invoked
	634	* properly, else we'll dump core.
	635	*/
146174a9	636	if (!PL_DBsub)
146174a9	637	croak("DProf: run perl with -d to use DProf.\n");
583a019e	638
	639	/* When we hook up the XS DB::sub we'll be redefining
	640	* the DB::sub from the PM file. Turn off warnings
	641	* while we do this.
	642	*/
	643	{
146174a9	644	I32 warn_tmp = PL_dowarn;
	645	PL_dowarn = 0;
	646	newXS("DB::sub", XS_DB_sub, file);
	647	newXS("DB::goto", XS_DB_goto, file);
	648	PL_dowarn = warn_tmp;
583a019e	649	}
583a019e	650
146174a9	651	sv_setiv(PL_DBsingle, 0); /* disable DB single-stepping */
583a019e	652
	653	{
	654	char *buffer = getenv("PERL_DPROF_BUFFER");
	655
	656	if (buffer) {
146174a9	657	g_SAVE_STACK = atoi(buffer);
583a019e	658	}
	659
	660	buffer = getenv("PERL_DPROF_TICKS");
	661
	662	if (buffer) {
146174a9	663	g_dprof_ticks = atoi(buffer); /* Used under OS/2 only */
	664	}
	665	else {
	666	g_dprof_ticks = HZ;
583a019e	667	}
583a019e	668
146174a9	669	buffer = getenv("PERL_DPROF_OUT_FILE_NAME");
	670	g_out_file_name = savepv(buffer ? buffer : "tmon.out");
	671	}
583a019e	672
146174a9	673	if ((g_fp = PerlIO_open(g_out_file_name, "w")) == NULL)
	674	croak("DProf: unable to write '%s', errno = %d\n",
	675	g_out_file_name, errno);
583a019e	676
146174a9	677	g_default_perldb = PERLDBf_NONAME \| PERLDBf_SUB \| PERLDBf_GOTO;
	678	g_cv_hash = newHV();
	679	g_prof_pid = (int)getpid();
583a019e	680
146174a9	681	New(0, g_profstack, g_profstack_max, PROFANY);
146174a9	682	prof_recordheader(aTHX);
583a019e	683	DBG_TIMER_NOTIFY("Profiler timer is on.\n");
146174a9	684	g_orealtime = g_rprof_start = Times(&g_prof_start);
	685	g_otms_utime = g_prof_start.tms_utime;
	686	g_otms_stime = g_prof_start.tms_stime;
	687	PL_perldb = g_default_perldb;
	688	}