161 lines
2.8 KiB
C
161 lines
2.8 KiB
C
|
|
#include <stdio.h>
|
|
#include <comedilib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <sys/ioctl.h>
|
|
#include <errno.h>
|
|
#include <getopt.h>
|
|
#include <ctype.h>
|
|
#include <math.h>
|
|
#include <sys/time.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
#include <signal.h>
|
|
#include <setjmp.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "comedi_test.h"
|
|
|
|
/* XXX this should come from elsewhere */
|
|
#define PAGE_SIZE 4096
|
|
|
|
#define N_SAMPLES 10000
|
|
|
|
#define BUFSZ N_SAMPLES*sizeof(sampl_t)
|
|
|
|
#define MAPLEN 20480
|
|
|
|
sigjmp_buf jump_env;
|
|
|
|
void segv_handler(int num)
|
|
{
|
|
siglongjmp(jump_env,1);
|
|
}
|
|
|
|
int test_segfault(void *memptr)
|
|
{
|
|
volatile char tmp;
|
|
int ret;
|
|
struct sigaction act;
|
|
struct sigaction oldact;
|
|
|
|
memset(&act,0,sizeof(act));
|
|
act.sa_handler=&segv_handler;
|
|
ret = sigaction(SIGSEGV,&act,&oldact);
|
|
if(ret)
|
|
{
|
|
fprintf(stderr, "sigaction failed\n");
|
|
return 0;
|
|
}
|
|
ret=sigsetjmp(jump_env, 1);
|
|
if(!ret) tmp = *((char *)(memptr));
|
|
sigaction(SIGSEGV,&oldact,NULL);
|
|
return ret;
|
|
}
|
|
|
|
int test_mmap(void)
|
|
{
|
|
comedi_cmd cmd;
|
|
unsigned char *buf;
|
|
unsigned int chanlist[1];
|
|
int go;
|
|
int fails;
|
|
int total=0;
|
|
int ret;
|
|
void *b;
|
|
unsigned char *adr;
|
|
unsigned char *map;
|
|
unsigned int flags;
|
|
int i;
|
|
|
|
flags = comedi_get_subdevice_flags(device,subdevice);
|
|
|
|
if(!(flags&SDF_CMD) || flags&SDF_WRITEABLE){
|
|
printf("not applicable\n");
|
|
return 0;
|
|
}
|
|
|
|
if(comedi_get_cmd_generic_timed(device,subdevice,&cmd,1)<0){
|
|
printf("E: comedi_get_cmd_generic_timed failed\n");
|
|
return 0;
|
|
}
|
|
|
|
buf=malloc(BUFSZ);
|
|
|
|
map=mmap(NULL,MAPLEN,PROT_READ,MAP_SHARED,comedi_fileno(device),0);
|
|
if(!map){
|
|
printf("E: mmap() failed\n");
|
|
return 0;
|
|
}
|
|
|
|
/* test readability */
|
|
for(adr=map;adr<map+MAPLEN;adr+=PAGE_SIZE){
|
|
ret=test_segfault(adr);
|
|
if(ret){
|
|
printf("E: %p failed\n",adr);
|
|
}else{
|
|
printf("%p ok\n",adr);
|
|
}
|
|
}
|
|
|
|
if(realtime)cmd.flags |= TRIG_RT;
|
|
|
|
cmd.chanlist = chanlist;
|
|
cmd.scan_end_arg = 1;
|
|
cmd.stop_arg = N_SAMPLES;
|
|
cmd.chanlist_len = 1;
|
|
chanlist[0] = CR_PACK(0,0,0);
|
|
|
|
comedi_command(device,&cmd);
|
|
|
|
go=1;
|
|
b=buf;
|
|
while(go){
|
|
ret = read(comedi_fileno(device),b,BUFSZ);
|
|
if(ret<0){
|
|
if(errno==EAGAIN){
|
|
usleep(10000);
|
|
}else{
|
|
go = 0;
|
|
perror("read");
|
|
}
|
|
}else if(ret==0){
|
|
go = 0;
|
|
}else{
|
|
total += ret;
|
|
b += ret;
|
|
if(verbose) printf("read %d %d\n",ret,total);
|
|
}
|
|
}
|
|
|
|
fails = 0;
|
|
for(i=0;i<total;i++){
|
|
if(buf[i]!=map[i]){
|
|
if(fails==0)printf("E: mmap compare failed\n");
|
|
printf("offset %d (read=%02x mmap=%02x)\n",i,
|
|
buf[i], map[i]);
|
|
go = 0;
|
|
fails++;
|
|
if(fails>10)break;
|
|
}
|
|
}
|
|
if(fails==0) printf("compare ok\n");
|
|
|
|
munmap(map,MAPLEN);
|
|
|
|
/* test if area is really unmapped */
|
|
for(adr=map;adr<map+MAPLEN;adr+=PAGE_SIZE){
|
|
ret=test_segfault(adr);
|
|
if(ret){
|
|
printf("%p segfaulted (ok)\n",adr);
|
|
}else{
|
|
printf("E: %p still mapped\n",adr);
|
|
}
|
|
}
|
|
|
|
free(buf);
|
|
|
|
return 0;
|
|
}
|
|
|