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/* profile.c: Z80 profiler
Copyright (c) 2005 Philip Kendall
$Id: profile.c 4640 2012-01-21 13:26:35Z pak21 $
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: Philip Kendall <philip-fuse@shadowmagic.org.uk>
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <libspectrum.h>
#include "event.h"
#include "fuse.h"
#include "module.h"
#include "profile.h"
#include "ui/ui.h"
#include "z80/z80.h"
int profile_active = 0;
static int total_tstates[ 0x10000 ];
static libspectrum_word profile_last_pc;
static libspectrum_dword profile_last_tstates;
static void profile_from_snapshot( libspectrum_snap *snap GCC_UNUSED );
static module_info_t profile_module_info = {
NULL,
NULL,
NULL,
profile_from_snapshot,
NULL,
};
void
profile_init( void )
{
module_register( &profile_module_info );
}
static void
init_profiling_counters( void )
{
profile_last_pc = z80.pc.w;
profile_last_tstates = tstates;
}
void
profile_start( void )
{
memset( total_tstates, 0, sizeof( total_tstates ) );
profile_active = 1;
init_profiling_counters();
/* Schedule an event to ensure that the main z80 emulation loop recognises
profiling is turned on; otherwise problems occur if we we started while
the debugger was active (bug #1530345) */
event_add( tstates, event_type_null );
ui_menu_activate( UI_MENU_ITEM_MACHINE_PROFILER, 1 );
}
void
profile_map( libspectrum_word pc )
{
if( tstates - profile_last_tstates > 256 ) fuse_abort();
total_tstates[ profile_last_pc ] += tstates - profile_last_tstates;
profile_last_pc = z80.pc.w;
profile_last_tstates = tstates;
}
void
profile_frame( libspectrum_dword frame_length )
{
profile_last_tstates -= frame_length;
}
/* On snapshot load, PC and the tstate counter will jump so reset our
current views of these */
static void
profile_from_snapshot( libspectrum_snap *snap GCC_UNUSED )
{
init_profiling_counters();
}
void
profile_finish( const char *filename )
{
FILE *f;
size_t i;
f = fopen( filename, "w" );
if( !f ) {
ui_error( UI_ERROR_ERROR, "unable to open profile map '%s' for writing",
filename );
return;
}
for( i = 0; i < 0x10000; i++ ) {
if( !total_tstates[ i ] ) continue;
fprintf( f, "0x%04lx,%d\n", (unsigned long)i, total_tstates[ i ] );
}
fclose( f );
profile_active = 0;
/* Again, schedule an event to ensure this change is picked up by
the main loop */
event_add( tstates, event_type_null );
ui_menu_activate( UI_MENU_ITEM_MACHINE_PROFILER, 0 );
}
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