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|
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
/*
# Devel::DProf - a Perl code profiler
# 5apr95
# Dean Roehrich
#
# changes/bugs fixed since 2apr95 version:
# -now mallocing an extra byte for the \0 :)
# changes/bugs fixed since 01mar95 version:
# -stringified code ref is used for name of anonymous sub.
# -include stash name with stringified code ref.
# -use perl.c's DBsingle and DBsub.
# -now using croak() and warn().
# -print "timer is on" before turning timer on.
# -use safefree() instead of free().
# -rely on PM to provide full path name to tmon.out.
# -print errno if unable to write tmon.out.
# changes/bugs fixed since 03feb95 version:
# -comments
# changes/bugs fixed since 31dec94 version:
# -added patches from Andy.
#
*/
/*#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 */
#ifndef HZ
#define HZ 60
#endif
static SV * Sub; /* pointer to $DB::sub */
static char *Tmon; /* name of tmon.out */
/* Everything is built on times(2). See its manpage for a description
* of the timings.
*/
static
struct tms prof_start,
prof_end;
static
clock_t rprof_start, /* elapsed real time, in ticks */
rprof_end;
union prof_any {
clock_t tms_utime; /* cpu time spent in user space */
clock_t tms_stime; /* cpu time spent in system */
clock_t realtime; /* elapsed real time, in ticks */
char *name;
opcode ptype;
};
typedef union prof_any PROFANY;
static PROFANY *profstack;
static int profstack_max = 128;
static int profstack_ix = 0;
static void
prof_mark( ptype )
opcode ptype;
{
struct tms t;
clock_t realtime;
char *name, *pv;
char *hvname;
STRLEN len;
SV *sv;
if( profstack_ix + 5 > profstack_max ){
profstack_max = profstack_max * 3 / 2;
Renew( profstack, profstack_max, PROFANY );
}
realtime = times(&t);
pv = SvPV( Sub, len );
if( SvROK(Sub) ){
/* Attempt to make CODE refs identifiable by
* including their package name.
*/
sv = (SV*)SvRV(Sub);
if( sv && SvTYPE(sv) == SVt_PVCV ){
hvname = HvNAME(CvSTASH(sv));
len += strlen( hvname ) + 2; /* +2 for more ::'s */
}
else {
croak( "DProf prof_mark() lost on supposed CODE ref %s.\n", pv );
}
name = (char *)safemalloc( len * sizeof(char) + 1 );
strcpy( name, hvname );
strcat( name, "::" );
strcat( name, pv );
}
else{
name = (char *)safemalloc( len * sizeof(char) + 1 );
strcpy( name, pv );
}
profstack[profstack_ix++].ptype = ptype;
profstack[profstack_ix++].tms_utime = t.tms_utime;
profstack[profstack_ix++].tms_stime = t.tms_stime;
profstack[profstack_ix++].realtime = realtime;
profstack[profstack_ix++].name = name;
}
static void
prof_record(){
FILE *fp;
char *name;
int base = 0;
opcode ptype;
clock_t tms_utime;
clock_t tms_stime;
clock_t realtime;
if( (fp = fopen( Tmon, "w" )) == NULL ){
warn("DProf: unable to write %s, errno = %d\n", Tmon, errno );
return;
}
fprintf(fp, "#fOrTyTwO\n" );
fprintf(fp, "$hz=%d;\n", HZ );
fprintf(fp, "# All values are given in HZ\n" );
fprintf(fp, "$rrun_utime=%ld; $rrun_stime=%ld; $rrun_rtime=%ld\n",
prof_end.tms_utime - prof_start.tms_utime,
prof_end.tms_stime - prof_start.tms_stime,
rprof_end - rprof_start );
fprintf(fp, "PART2\n" );
while( base < profstack_ix ){
ptype = profstack[base++].ptype;
tms_utime = profstack[base++].tms_utime;
tms_stime = profstack[base++].tms_stime;
realtime = profstack[base++].realtime;
name = profstack[base++].name;
switch( ptype ){
case OP_LEAVESUB:
fprintf(fp,"- %ld %ld %ld %s\n",
tms_utime, tms_stime, realtime, name );
break;
case OP_ENTERSUB:
fprintf(fp,"+ %ld %ld %ld %s\n",
tms_utime, tms_stime, realtime, name );
break;
default:
fprintf(fp,"Profiler unknown prof code %d\n", ptype);
}
}
fclose( fp );
}
#define for_real
#ifdef for_real
XS(XS_DB_sub)
{
dXSARGS;
dORIGMARK;
SP -= items;
DBG_SUB_NOTIFY( "XS DBsub(%s)\n", SvPV(Sub, na) );
sv_setiv( DBsingle, 0 ); /* disable DB single-stepping */
prof_mark( OP_ENTERSUB );
PUSHMARK( ORIGMARK );
perl_call_sv( Sub, GIMME );
prof_mark( OP_LEAVESUB );
SPAGAIN;
PUTBACK;
return;
}
#endif /* for_real */
#ifdef testing
MODULE = Devel::DProf PACKAGE = DB
void
sub(...)
PPCODE:
dORIGMARK;
/* SP -= items; added by xsubpp */
DBG_SUB_NOTIFY( "XS DBsub(%s)\n", SvPV(Sub, na) );
sv_setiv( DBsingle, 0 ); /* disable DB single-stepping */
prof_mark( OP_ENTERSUB );
PUSHMARK( ORIGMARK );
perl_call_sv( Sub, GIMME );
prof_mark( OP_LEAVESUB );
SPAGAIN;
/* PUTBACK; added by xsubpp */
#endif /* testing */
MODULE = Devel::DProf PACKAGE = Devel::DProf
void
END()
PPCODE:
rprof_end = times(&prof_end);
DBG_TIMER_NOTIFY("Profiler timer is off.\n");
prof_record();
BOOT:
newXS("DB::sub", XS_DB_sub, file);
Sub = GvSV(DBsub); /* name of current sub */
sv_setiv( DBsingle, 0 ); /* disable DB single-stepping */
{ /* obtain name of tmon.out file */
SV *sv;
sv = perl_get_sv( "DB::tmon", FALSE );
Tmon = (char *)safemalloc( SvCUR(sv) * sizeof(char) );
strcpy( Tmon, SvPVX(sv) );
}
New( 0, profstack, profstack_max, PROFANY );
DBG_TIMER_NOTIFY("Profiler timer is on.\n");
rprof_start = times(&prof_start);
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