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Readying for CS 450 xv6 assignment

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This commit is contained in:
Michael Lee 2013-06-25 19:46:06 -05:00
parent 0ae596828b
commit 6e0d8f2ef6
4 changed files with 76 additions and 4 deletions
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6
Makefile
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@ -170,6 +170,8 @@ UPROGS=\
_usertests\
_wc\
_zombie\
_bigtest\
#_getcount\
fs.img: mkfs README $(UPROGS)
./mkfs fs.img README $(UPROGS)
@ -206,9 +208,9 @@ QEMUGDB = $(shell if $(QEMU) -help | grep -q '^-gdb'; \
then echo "-gdb tcp::$(GDBPORT)"; \
else echo "-s -p $(GDBPORT)"; fi)
ifndef CPUS
CPUS := 2
CPUS := 1
endif
QEMUOPTS = -hdb fs.img xv6.img -smp $(CPUS) -m 512 $(QEMUEXTRA)
QEMUOPTS = -hdb fs.img xv6.img -smp $(CPUS) -m 512 $(QEMUEXTRA) -snapshot
qemu: fs.img xv6.img
$(QEMU) -serial mon:stdio $(QEMUOPTS)

51
bigtest.c Normal file
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@ -0,0 +1,51 @@
#include "types.h"
#include "stat.h"
#include "user.h"
#include "fcntl.h"
int
main()
{
char buf[512];
int fd, i, sectors;
fd = open("big.file", O_CREATE | O_WRONLY);
if(fd < 0){
printf(2, "big: cannot open big.file for writing\n");
exit();
}
sectors = 0;
while(1){
*(int*)buf = sectors;
int cc = write(fd, buf, sizeof(buf));
if(cc <= 0)
break;
sectors++;
if (sectors % 100 == 0)
printf(2, ".");
}
printf(1, "\nwrote %d sectors\n", sectors);
close(fd);
fd = open("big.file", O_RDONLY);
if(fd < 0){
printf(2, "big: cannot re-open big.file for reading\n");
exit();
}
for(i = 0; i < sectors; i++){
int cc = read(fd, buf, sizeof(buf));
if(cc <= 0){
printf(2, "big: read error at sector %d\n", i);
exit();
}
if(*(int*)buf != i){
printf(2, "big: read the wrong data (%d) for sector %d\n",
*(int*)buf, i);
exit();
}
}
exit();
}

19
getcount.c Normal file
View file

@ -0,0 +1,19 @@
#include "types.h"
#include "user.h"
#include "syscall.h"
int
main(int argc, char *argv[])
{
printf(1, "initial fork count %d\n", getcount(SYS_fork));
if (fork() == 0) {
printf(1, "child fork count %d\n", getcount(SYS_fork));
printf(1, "child write count %d\n", getcount(SYS_write));
} else {
wait();
printf(1, "parent fork count %d\n", getcount(SYS_fork));
printf(1, "parent write count %d\n", getcount(SYS_write));
}
printf(1, "wait count %d\n", getcount(SYS_wait));
exit();
}

4
mkfs.c
View file

@ -13,10 +13,10 @@
#define static_assert(a, b) do { switch (0) case 0: case (a): ; } while (0)
int nblocks = 985;
int nblocks = 25000;
int nlog = LOGSIZE;
int ninodes = 200;
int size = 1024;
int size = 25045;
int fsfd;
struct superblock sb;