blob: 34e98d6e7048b52f62dab7e2e7d11a2d929bd800 [file] [log] [blame]
/*--------------------------------------------------------------------*/
/*--- Profiling machinery -- not for release builds! ---*/
/*--- vg_profile.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, an x86 protected-mode emulator
designed for debugging and profiling binaries on x86-Unixes.
Copyright (C) 2000-2002 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file LICENSE.
*/
#include "vg_include.h"
#ifdef VG_PROFILE
/* get rid of these, if possible */
#include <signal.h>
#include <sys/time.h>
#define VGP_PAIR(enumname,str) str
static const Char* vgp_names[VGP_M_CCS] = { VGP_LIST };
#undef VGP_PAIR
static Int vgp_nticks;
static Int vgp_counts[VGP_M_CCS];
static Int vgp_entries[VGP_M_CCS];
static Int vgp_sp;
static VgpCC vgp_stack[VGP_M_STACK];
void VGP_(tick) ( int sigNo )
{
Int cc;
vgp_nticks++;
cc = vgp_stack[vgp_sp];
vg_assert(cc >= 0 && cc < VGP_M_CCS);
vgp_counts[ cc ]++;
}
void VGP_(init_profiling) ( void )
{
struct itimerval value;
Int i, ret;
for (i = 0; i < VGP_M_CCS; i++)
vgp_counts[i] = vgp_entries[i] = 0;
vgp_nticks = 0;
vgp_sp = -1;
VGP_(pushcc) ( VgpUnc );
value.it_interval.tv_sec = 0;
value.it_interval.tv_usec = 10 * 1000;
value.it_value = value.it_interval;
signal(SIGPROF, VGP_(tick) );
ret = setitimer(ITIMER_PROF, &value, NULL);
if (ret != 0) VG_(panic)("vgp_init_profiling");
}
void VGP_(done_profiling) ( void )
{
Int i;
VG_(printf)("Profiling done, %d ticks\n", vgp_nticks);
for (i = 0; i < VGP_M_CCS; i++)
VG_(printf)("%2d: %4d (%3d %%%%) ticks, %8d entries for %s\n",
i, vgp_counts[i],
(Int)(1000.0 * (double)vgp_counts[i] / (double)vgp_nticks),
vgp_entries[i],
vgp_names[i] );
}
void VGP_(pushcc) ( VgpCC cc )
{
if (vgp_sp >= VGP_M_STACK-1) VG_(panic)("vgp_pushcc");
vgp_sp++;
vgp_stack[vgp_sp] = cc;
vgp_entries[ cc ] ++;
}
void VGP_(popcc) ( void )
{
if (vgp_sp <= 0) VG_(panic)("vgp_popcc");
vgp_sp--;
}
#endif /* VG_PROFILE */
/*--------------------------------------------------------------------*/
/*--- end vg_profile.c ---*/
/*--------------------------------------------------------------------*/