xv6-65oo2/user/usertests.c
2019-08-27 13:13:03 -04:00

2007 lines
36 KiB
C

#include "kernel/param.h"
#include "kernel/types.h"
#include "kernel/stat.h"
#include "user/user.h"
#include "kernel/fs.h"
#include "kernel/fcntl.h"
#include "kernel/syscall.h"
#include "kernel/memlayout.h"
#include "kernel/riscv.h"
#define BUFSZ (MAXOPBLOCKS+2)*BSIZE
char buf[BUFSZ];
char name[3];
char *echoargv[] = { "echo", "ALL", "TESTS", "PASSED", 0 };
// does chdir() call iput(p->cwd) in a transaction?
void
iputtest(void)
{
printf("iput test\n");
if(mkdir("iputdir") < 0){
printf("mkdir failed\n");
exit();
}
if(chdir("iputdir") < 0){
printf("chdir iputdir failed\n");
exit();
}
if(unlink("../iputdir") < 0){
printf("unlink ../iputdir failed\n");
exit();
}
if(chdir("/") < 0){
printf("chdir / failed\n");
exit();
}
printf("iput test ok\n");
}
// does exit() call iput(p->cwd) in a transaction?
void
exitiputtest(void)
{
int pid;
printf("exitiput test\n");
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid == 0){
if(mkdir("iputdir") < 0){
printf("mkdir failed\n");
exit();
}
if(chdir("iputdir") < 0){
printf("child chdir failed\n");
exit();
}
if(unlink("../iputdir") < 0){
printf("unlink ../iputdir failed\n");
exit();
}
exit();
}
wait();
printf("exitiput test ok\n");
}
// does the error path in open() for attempt to write a
// directory call iput() in a transaction?
// needs a hacked kernel that pauses just after the namei()
// call in sys_open():
// if((ip = namei(path)) == 0)
// return -1;
// {
// int i;
// for(i = 0; i < 10000; i++)
// yield();
// }
void
openiputtest(void)
{
int pid;
printf("openiput test\n");
if(mkdir("oidir") < 0){
printf("mkdir oidir failed\n");
exit();
}
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid == 0){
int fd = open("oidir", O_RDWR);
if(fd >= 0){
printf("open directory for write succeeded\n");
exit();
}
exit();
}
sleep(1);
if(unlink("oidir") != 0){
printf("unlink failed\n");
exit();
}
wait();
printf("openiput test ok\n");
}
// simple file system tests
void
opentest(void)
{
int fd;
printf("open test\n");
fd = open("echo", 0);
if(fd < 0){
printf("open echo failed!\n");
exit();
}
close(fd);
fd = open("doesnotexist", 0);
if(fd >= 0){
printf("open doesnotexist succeeded!\n");
exit();
}
printf("open test ok\n");
}
void
writetest(void)
{
int fd;
int i;
enum { N=100, SZ=10 };
printf("small file test\n");
fd = open("small", O_CREATE|O_RDWR);
if(fd >= 0){
printf("creat small succeeded; ok\n");
} else {
printf("error: creat small failed!\n");
exit();
}
for(i = 0; i < N; i++){
if(write(fd, "aaaaaaaaaa", SZ) != SZ){
printf("error: write aa %d new file failed\n", i);
exit();
}
if(write(fd, "bbbbbbbbbb", SZ) != SZ){
printf("error: write bb %d new file failed\n", i);
exit();
}
}
printf("writes ok\n");
close(fd);
fd = open("small", O_RDONLY);
if(fd >= 0){
printf("open small succeeded ok\n");
} else {
printf("error: open small failed!\n");
exit();
}
i = read(fd, buf, N*SZ*2);
if(i == N*SZ*2){
printf("read succeeded ok\n");
} else {
printf("read failed\n");
exit();
}
close(fd);
if(unlink("small") < 0){
printf("unlink small failed\n");
exit();
}
printf("small file test ok\n");
}
void
writetest1(void)
{
int i, fd, n;
printf("big files test\n");
fd = open("big", O_CREATE|O_RDWR);
if(fd < 0){
printf("error: creat big failed!\n");
exit();
}
for(i = 0; i < MAXFILE; i++){
((int*)buf)[0] = i;
if(write(fd, buf, BSIZE) != BSIZE){
printf("error: write big file failed\n", i);
exit();
}
}
close(fd);
fd = open("big", O_RDONLY);
if(fd < 0){
printf("error: open big failed!\n");
exit();
}
n = 0;
for(;;){
i = read(fd, buf, BSIZE);
if(i == 0){
if(n == MAXFILE - 1){
printf("read only %d blocks from big", n);
exit();
}
break;
} else if(i != BSIZE){
printf("read failed %d\n", i);
exit();
}
if(((int*)buf)[0] != n){
printf("read content of block %d is %d\n",
n, ((int*)buf)[0]);
exit();
}
n++;
}
close(fd);
if(unlink("big") < 0){
printf("unlink big failed\n");
exit();
}
printf("big files ok\n");
}
void
createtest(void)
{
int i, fd;
enum { N=52 };
printf("many creates, followed by unlink test\n");
name[0] = 'a';
name[2] = '\0';
for(i = 0; i < N; i++){
name[1] = '0' + i;
fd = open(name, O_CREATE|O_RDWR);
close(fd);
}
name[0] = 'a';
name[2] = '\0';
for(i = 0; i < N; i++){
name[1] = '0' + i;
unlink(name);
}
printf("many creates, followed by unlink; ok\n");
}
void dirtest(void)
{
printf("mkdir test\n");
if(mkdir("dir0") < 0){
printf("mkdir failed\n");
exit();
}
if(chdir("dir0") < 0){
printf("chdir dir0 failed\n");
exit();
}
if(chdir("..") < 0){
printf("chdir .. failed\n");
exit();
}
if(unlink("dir0") < 0){
printf("unlink dir0 failed\n");
exit();
}
printf("mkdir test ok\n");
}
void
exectest(void)
{
printf("exec test\n");
if(exec("echo", echoargv) < 0){
printf("exec echo failed\n");
exit();
}
}
// simple fork and pipe read/write
void
pipe1(void)
{
int fds[2], pid;
int seq, i, n, cc, total;
enum { N=5, SZ=1033 };
if(pipe(fds) != 0){
printf("pipe() failed\n");
exit();
}
pid = fork();
seq = 0;
if(pid == 0){
close(fds[0]);
for(n = 0; n < N; n++){
for(i = 0; i < SZ; i++)
buf[i] = seq++;
if(write(fds[1], buf, SZ) != SZ){
printf("pipe1 oops 1\n");
exit();
}
}
exit();
} else if(pid > 0){
close(fds[1]);
total = 0;
cc = 1;
while((n = read(fds[0], buf, cc)) > 0){
for(i = 0; i < n; i++){
if((buf[i] & 0xff) != (seq++ & 0xff)){
printf("pipe1 oops 2\n");
return;
}
}
total += n;
cc = cc * 2;
if(cc > sizeof(buf))
cc = sizeof(buf);
}
if(total != N * SZ){
printf("pipe1 oops 3 total %d\n", total);
exit();
}
close(fds[0]);
wait();
} else {
printf("fork() failed\n");
exit();
}
printf("pipe1 ok\n");
}
// meant to be run w/ at most two CPUs
void
preempt(void)
{
int pid1, pid2, pid3;
int pfds[2];
printf("preempt: ");
pid1 = fork();
if(pid1 < 0) {
printf("fork failed");
exit();
}
if(pid1 == 0)
for(;;)
;
pid2 = fork();
if(pid2 < 0) {
printf("fork failed\n");
exit();
}
if(pid2 == 0)
for(;;)
;
pipe(pfds);
pid3 = fork();
if(pid3 < 0) {
printf("fork failed\n");
exit();
}
if(pid3 == 0){
close(pfds[0]);
if(write(pfds[1], "x", 1) != 1)
printf("preempt write error");
close(pfds[1]);
for(;;)
;
}
close(pfds[1]);
if(read(pfds[0], buf, sizeof(buf)) != 1){
printf("preempt read error");
return;
}
close(pfds[0]);
printf("kill... ");
kill(pid1);
kill(pid2);
kill(pid3);
printf("wait... ");
wait();
wait();
wait();
printf("preempt ok\n");
}
// try to find any races between exit and wait
void
exitwait(void)
{
int i, pid;
printf("exitwait test\n");
for(i = 0; i < 100; i++){
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid){
if(wait() != pid){
printf("wait wrong pid\n");
exit();
}
} else {
exit();
}
}
printf("exitwait ok\n");
}
// try to find races in the reparenting
// code that handles a parent exiting
// when it still has live children.
void
reparent(void)
{
int master_pid = getpid();
printf("reparent test\n");
for(int i = 0; i < 200; i++){
int pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid){
if(wait() != pid){
printf("wait wrong pid\n");
exit();
}
} else {
int pid2 = fork();
if(pid2 < 0){
printf("fork failed\n");
kill(master_pid);
exit();
}
if(pid2 == 0){
exit();
} else {
exit();
}
}
}
printf("reparent ok\n");
}
// what if two children exit() at the same time?
void
twochildren(void)
{
printf("twochildren test\n");
for(int i = 0; i < 1000; i++){
int pid1 = fork();
if(pid1 < 0){
printf("fork failed\n");
exit();
}
if(pid1 == 0){
exit();
} else {
int pid2 = fork();
if(pid2 < 0){
printf("fork failed\n");
exit();
}
if(pid2 == 0){
exit();
} else {
wait();
wait();
}
}
}
printf("twochildren ok\n");
}
// concurrent forks to try to expose locking bugs.
void
forkfork(void)
{
int ppid = getpid();
enum { N=2 };
printf("forkfork test\n");
for(int i = 0; i < N; i++){
int pid = fork();
if(pid < 0){
printf("fork failed");
exit();
}
if(pid == 0){
for(int j = 0; j < 200; j++){
int pid1 = fork();
if(pid1 < 0){
printf("fork failed\n");
kill(ppid);
exit();
}
if(pid1 == 0){
exit();
}
wait();
}
exit();
}
}
for(int i = 0; i < N; i++){
wait();
}
printf("forkfork ok\n");
}
void
forkforkfork(void)
{
printf("forkforkfork test\n");
unlink("stopforking");
int pid = fork();
if(pid < 0){
printf("fork failed");
exit();
}
if(pid == 0){
while(1){
int fd = open("stopforking", 0);
if(fd >= 0){
exit();
}
if(fork() < 0){
close(open("stopforking", O_CREATE|O_RDWR));
}
}
exit();
}
sleep(20); // two seconds
close(open("stopforking", O_CREATE|O_RDWR));
wait();
sleep(10); // one second
printf("forkforkfork ok\n");
}
void
mem(void)
{
void *m1, *m2;
int pid, ppid;
printf("mem test\n");
ppid = getpid();
if((pid = fork()) == 0){
m1 = 0;
while((m2 = malloc(10001)) != 0){
*(char**)m2 = m1;
m1 = m2;
}
while(m1){
m2 = *(char**)m1;
free(m1);
m1 = m2;
}
m1 = malloc(1024*20);
if(m1 == 0){
printf("couldn't allocate mem?!!\n");
kill(ppid);
exit();
}
free(m1);
printf("mem ok\n");
exit();
} else {
wait();
}
}
// More file system tests
// two processes write to the same file descriptor
// is the offset shared? does inode locking work?
void
sharedfd(void)
{
int fd, pid, i, n, nc, np;
enum { N = 1000, SZ=10};
char buf[SZ];
printf("sharedfd test\n");
unlink("sharedfd");
fd = open("sharedfd", O_CREATE|O_RDWR);
if(fd < 0){
printf("fstests: cannot open sharedfd for writing");
return;
}
pid = fork();
memset(buf, pid==0?'c':'p', sizeof(buf));
for(i = 0; i < N; i++){
if(write(fd, buf, sizeof(buf)) != sizeof(buf)){
printf("fstests: write sharedfd failed\n");
break;
}
}
if(pid == 0)
exit();
else
wait();
close(fd);
fd = open("sharedfd", 0);
if(fd < 0){
printf("fstests: cannot open sharedfd for reading\n");
return;
}
nc = np = 0;
while((n = read(fd, buf, sizeof(buf))) > 0){
for(i = 0; i < sizeof(buf); i++){
if(buf[i] == 'c')
nc++;
if(buf[i] == 'p')
np++;
}
}
close(fd);
unlink("sharedfd");
if(nc == N*SZ && np == N*SZ){
printf("sharedfd ok\n");
} else {
printf("sharedfd oops %d %d\n", nc, np);
exit();
}
}
// four processes write different files at the same
// time, to test block allocation.
void
fourfiles(void)
{
int fd, pid, i, j, n, total, pi;
char *names[] = { "f0", "f1", "f2", "f3" };
char *fname;
enum { N=12, NCHILD=4, SZ=500 };
printf("fourfiles test\n");
for(pi = 0; pi < NCHILD; pi++){
fname = names[pi];
unlink(fname);
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid == 0){
fd = open(fname, O_CREATE | O_RDWR);
if(fd < 0){
printf("create failed\n");
exit();
}
memset(buf, '0'+pi, SZ);
for(i = 0; i < N; i++){
if((n = write(fd, buf, SZ)) != SZ){
printf("write failed %d\n", n);
exit();
}
}
exit();
}
}
for(pi = 0; pi < NCHILD; pi++){
wait();
}
for(i = 0; i < NCHILD; i++){
fname = names[i];
fd = open(fname, 0);
total = 0;
while((n = read(fd, buf, sizeof(buf))) > 0){
for(j = 0; j < n; j++){
if(buf[j] != '0'+i){
printf("wrong char\n");
exit();
}
}
total += n;
}
close(fd);
if(total != N*SZ){
printf("wrong length %d\n", total);
exit();
}
unlink(fname);
}
printf("fourfiles ok\n");
}
// four processes create and delete different files in same directory
void
createdelete(void)
{
enum { N = 20, NCHILD=4 };
int pid, i, fd, pi;
char name[32];
printf("createdelete test\n");
for(pi = 0; pi < NCHILD; pi++){
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid == 0){
name[0] = 'p' + pi;
name[2] = '\0';
for(i = 0; i < N; i++){
name[1] = '0' + i;
fd = open(name, O_CREATE | O_RDWR);
if(fd < 0){
printf("create failed\n");
exit();
}
close(fd);
if(i > 0 && (i % 2 ) == 0){
name[1] = '0' + (i / 2);
if(unlink(name) < 0){
printf("unlink failed\n");
exit();
}
}
}
exit();
}
}
for(pi = 0; pi < NCHILD; pi++){
wait();
}
name[0] = name[1] = name[2] = 0;
for(i = 0; i < N; i++){
for(pi = 0; pi < NCHILD; pi++){
name[0] = 'p' + pi;
name[1] = '0' + i;
fd = open(name, 0);
if((i == 0 || i >= N/2) && fd < 0){
printf("oops createdelete %s didn't exist\n", name);
exit();
} else if((i >= 1 && i < N/2) && fd >= 0){
printf("oops createdelete %s did exist\n", name);
exit();
}
if(fd >= 0)
close(fd);
}
}
for(i = 0; i < N; i++){
for(pi = 0; pi < NCHILD; pi++){
name[0] = 'p' + i;
name[1] = '0' + i;
unlink(name);
}
}
printf("createdelete ok\n");
}
// can I unlink a file and still read it?
void
unlinkread(void)
{
enum { SZ = 5 };
int fd, fd1;
printf("unlinkread test\n");
fd = open("unlinkread", O_CREATE | O_RDWR);
if(fd < 0){
printf("create unlinkread failed\n");
exit();
}
write(fd, "hello", SZ);
close(fd);
fd = open("unlinkread", O_RDWR);
if(fd < 0){
printf("open unlinkread failed\n");
exit();
}
if(unlink("unlinkread") != 0){
printf("unlink unlinkread failed\n");
exit();
}
fd1 = open("unlinkread", O_CREATE | O_RDWR);
write(fd1, "yyy", 3);
close(fd1);
if(read(fd, buf, sizeof(buf)) != SZ){
printf("unlinkread read failed");
exit();
}
if(buf[0] != 'h'){
printf("unlinkread wrong data\n");
exit();
}
if(write(fd, buf, 10) != 10){
printf("unlinkread write failed\n");
exit();
}
close(fd);
unlink("unlinkread");
printf("unlinkread ok\n");
}
void
linktest(void)
{
enum { SZ = 5 };
int fd;
printf("linktest\n");
unlink("lf1");
unlink("lf2");
fd = open("lf1", O_CREATE|O_RDWR);
if(fd < 0){
printf("create lf1 failed\n");
exit();
}
if(write(fd, "hello", SZ) != SZ){
printf("write lf1 failed\n");
exit();
}
close(fd);
if(link("lf1", "lf2") < 0){
printf("link lf1 lf2 failed\n");
exit();
}
unlink("lf1");
if(open("lf1", 0) >= 0){
printf("unlinked lf1 but it is still there!\n");
exit();
}
fd = open("lf2", 0);
if(fd < 0){
printf("open lf2 failed\n");
exit();
}
if(read(fd, buf, sizeof(buf)) != SZ){
printf("read lf2 failed\n");
exit();
}
close(fd);
if(link("lf2", "lf2") >= 0){
printf("link lf2 lf2 succeeded! oops\n");
exit();
}
unlink("lf2");
if(link("lf2", "lf1") >= 0){
printf("link non-existant succeeded! oops\n");
exit();
}
if(link(".", "lf1") >= 0){
printf("link . lf1 succeeded! oops\n");
exit();
}
printf("linktest ok\n");
}
// test concurrent create/link/unlink of the same file
void
concreate(void)
{
enum { N = 40 };
char file[3];
int i, pid, n, fd;
char fa[N];
struct {
ushort inum;
char name[DIRSIZ];
} de;
printf("concreate test\n");
file[0] = 'C';
file[2] = '\0';
for(i = 0; i < N; i++){
file[1] = '0' + i;
unlink(file);
pid = fork();
if(pid && (i % 3) == 1){
link("C0", file);
} else if(pid == 0 && (i % 5) == 1){
link("C0", file);
} else {
fd = open(file, O_CREATE | O_RDWR);
if(fd < 0){
printf("concreate create %s failed\n", file);
exit();
}
close(fd);
}
if(pid == 0)
exit();
else
wait();
}
memset(fa, 0, sizeof(fa));
fd = open(".", 0);
n = 0;
while(read(fd, &de, sizeof(de)) > 0){
if(de.inum == 0)
continue;
if(de.name[0] == 'C' && de.name[2] == '\0'){
i = de.name[1] - '0';
if(i < 0 || i >= sizeof(fa)){
printf("concreate weird file %s\n", de.name);
exit();
}
if(fa[i]){
printf("concreate duplicate file %s\n", de.name);
exit();
}
fa[i] = 1;
n++;
}
}
close(fd);
if(n != N){
printf("concreate not enough files in directory listing\n");
exit();
}
for(i = 0; i < N; i++){
file[1] = '0' + i;
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(((i % 3) == 0 && pid == 0) ||
((i % 3) == 1 && pid != 0)){
close(open(file, 0));
close(open(file, 0));
close(open(file, 0));
close(open(file, 0));
} else {
unlink(file);
unlink(file);
unlink(file);
unlink(file);
}
if(pid == 0)
exit();
else
wait();
}
printf("concreate ok\n");
}
// another concurrent link/unlink/create test,
// to look for deadlocks.
void
linkunlink()
{
int pid, i;
printf("linkunlink test\n");
unlink("x");
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
unsigned int x = (pid ? 1 : 97);
for(i = 0; i < 100; i++){
x = x * 1103515245 + 12345;
if((x % 3) == 0){
close(open("x", O_RDWR | O_CREATE));
} else if((x % 3) == 1){
link("cat", "x");
} else {
unlink("x");
}
}
if(pid)
wait();
else
exit();
printf("linkunlink ok\n");
}
// directory that uses indirect blocks
void
bigdir(void)
{
enum { N = 500 };
int i, fd;
char name[10];
printf("bigdir test\n");
unlink("bd");
fd = open("bd", O_CREATE);
if(fd < 0){
printf("bigdir create failed\n");
exit();
}
close(fd);
for(i = 0; i < N; i++){
name[0] = 'x';
name[1] = '0' + (i / 64);
name[2] = '0' + (i % 64);
name[3] = '\0';
if(link("bd", name) != 0){
printf("bigdir link failed\n");
exit();
}
}
unlink("bd");
for(i = 0; i < N; i++){
name[0] = 'x';
name[1] = '0' + (i / 64);
name[2] = '0' + (i % 64);
name[3] = '\0';
if(unlink(name) != 0){
printf("bigdir unlink failed");
exit();
}
}
printf("bigdir ok\n");
}
void
subdir(void)
{
int fd, cc;
printf("subdir test\n");
unlink("ff");
if(mkdir("dd") != 0){
printf("subdir mkdir dd failed\n");
exit();
}
fd = open("dd/ff", O_CREATE | O_RDWR);
if(fd < 0){
printf("create dd/ff failed\n");
exit();
}
write(fd, "ff", 2);
close(fd);
if(unlink("dd") >= 0){
printf("unlink dd (non-empty dir) succeeded!\n");
exit();
}
if(mkdir("/dd/dd") != 0){
printf("subdir mkdir dd/dd failed\n");
exit();
}
fd = open("dd/dd/ff", O_CREATE | O_RDWR);
if(fd < 0){
printf("create dd/dd/ff failed\n");
exit();
}
write(fd, "FF", 2);
close(fd);
fd = open("dd/dd/../ff", 0);
if(fd < 0){
printf("open dd/dd/../ff failed\n");
exit();
}
cc = read(fd, buf, sizeof(buf));
if(cc != 2 || buf[0] != 'f'){
printf("dd/dd/../ff wrong content\n");
exit();
}
close(fd);
if(link("dd/dd/ff", "dd/dd/ffff") != 0){
printf("link dd/dd/ff dd/dd/ffff failed\n");
exit();
}
if(unlink("dd/dd/ff") != 0){
printf("unlink dd/dd/ff failed\n");
exit();
}
if(open("dd/dd/ff", O_RDONLY) >= 0){
printf("open (unlinked) dd/dd/ff succeeded\n");
exit();
}
if(chdir("dd") != 0){
printf("chdir dd failed\n");
exit();
}
if(chdir("dd/../../dd") != 0){
printf("chdir dd/../../dd failed\n");
exit();
}
if(chdir("dd/../../../dd") != 0){
printf("chdir dd/../../dd failed\n");
exit();
}
if(chdir("./..") != 0){
printf("chdir ./.. failed\n");
exit();
}
fd = open("dd/dd/ffff", 0);
if(fd < 0){
printf("open dd/dd/ffff failed\n");
exit();
}
if(read(fd, buf, sizeof(buf)) != 2){
printf("read dd/dd/ffff wrong len\n");
exit();
}
close(fd);
if(open("dd/dd/ff", O_RDONLY) >= 0){
printf("open (unlinked) dd/dd/ff succeeded!\n");
exit();
}
if(open("dd/ff/ff", O_CREATE|O_RDWR) >= 0){
printf("create dd/ff/ff succeeded!\n");
exit();
}
if(open("dd/xx/ff", O_CREATE|O_RDWR) >= 0){
printf("create dd/xx/ff succeeded!\n");
exit();
}
if(open("dd", O_CREATE) >= 0){
printf("create dd succeeded!\n");
exit();
}
if(open("dd", O_RDWR) >= 0){
printf("open dd rdwr succeeded!\n");
exit();
}
if(open("dd", O_WRONLY) >= 0){
printf("open dd wronly succeeded!\n");
exit();
}
if(link("dd/ff/ff", "dd/dd/xx") == 0){
printf("link dd/ff/ff dd/dd/xx succeeded!\n");
exit();
}
if(link("dd/xx/ff", "dd/dd/xx") == 0){
printf("link dd/xx/ff dd/dd/xx succeeded!\n");
exit();
}
if(link("dd/ff", "dd/dd/ffff") == 0){
printf("link dd/ff dd/dd/ffff succeeded!\n");
exit();
}
if(mkdir("dd/ff/ff") == 0){
printf("mkdir dd/ff/ff succeeded!\n");
exit();
}
if(mkdir("dd/xx/ff") == 0){
printf("mkdir dd/xx/ff succeeded!\n");
exit();
}
if(mkdir("dd/dd/ffff") == 0){
printf("mkdir dd/dd/ffff succeeded!\n");
exit();
}
if(unlink("dd/xx/ff") == 0){
printf("unlink dd/xx/ff succeeded!\n");
exit();
}
if(unlink("dd/ff/ff") == 0){
printf("unlink dd/ff/ff succeeded!\n");
exit();
}
if(chdir("dd/ff") == 0){
printf("chdir dd/ff succeeded!\n");
exit();
}
if(chdir("dd/xx") == 0){
printf("chdir dd/xx succeeded!\n");
exit();
}
if(unlink("dd/dd/ffff") != 0){
printf("unlink dd/dd/ff failed\n");
exit();
}
if(unlink("dd/ff") != 0){
printf("unlink dd/ff failed\n");
exit();
}
if(unlink("dd") == 0){
printf("unlink non-empty dd succeeded!\n");
exit();
}
if(unlink("dd/dd") < 0){
printf("unlink dd/dd failed\n");
exit();
}
if(unlink("dd") < 0){
printf("unlink dd failed\n");
exit();
}
printf("subdir ok\n");
}
// test writes that are larger than the log.
void
bigwrite(void)
{
int fd, sz;
printf("bigwrite test\n");
unlink("bigwrite");
for(sz = 499; sz < (MAXOPBLOCKS+2)*BSIZE; sz += 471){
fd = open("bigwrite", O_CREATE | O_RDWR);
if(fd < 0){
printf("cannot create bigwrite\n");
exit();
}
int i;
for(i = 0; i < 2; i++){
int cc = write(fd, buf, sz);
if(cc != sz){
printf("write(%d) ret %d\n", sz, cc);
exit();
}
}
close(fd);
unlink("bigwrite");
}
printf("bigwrite ok\n");
}
void
bigfile(void)
{
enum { N = 20, SZ=600 };
int fd, i, total, cc;
printf("bigfile test\n");
unlink("bigfile");
fd = open("bigfile", O_CREATE | O_RDWR);
if(fd < 0){
printf("cannot create bigfile");
exit();
}
for(i = 0; i < N; i++){
memset(buf, i, SZ);
if(write(fd, buf, SZ) != SZ){
printf("write bigfile failed\n");
exit();
}
}
close(fd);
fd = open("bigfile", 0);
if(fd < 0){
printf("cannot open bigfile\n");
exit();
}
total = 0;
for(i = 0; ; i++){
cc = read(fd, buf, SZ/2);
if(cc < 0){
printf("read bigfile failed\n");
exit();
}
if(cc == 0)
break;
if(cc != SZ/2){
printf("short read bigfile\n");
exit();
}
if(buf[0] != i/2 || buf[SZ/2-1] != i/2){
printf("read bigfile wrong data\n");
exit();
}
total += cc;
}
close(fd);
if(total != N*SZ){
printf("read bigfile wrong total\n");
exit();
}
unlink("bigfile");
printf("bigfile test ok\n");
}
void
fourteen(void)
{
int fd;
// DIRSIZ is 14.
printf("fourteen test\n");
if(mkdir("12345678901234") != 0){
printf("mkdir 12345678901234 failed\n");
exit();
}
if(mkdir("12345678901234/123456789012345") != 0){
printf("mkdir 12345678901234/123456789012345 failed\n");
exit();
}
fd = open("123456789012345/123456789012345/123456789012345", O_CREATE);
if(fd < 0){
printf("create 123456789012345/123456789012345/123456789012345 failed\n");
exit();
}
close(fd);
fd = open("12345678901234/12345678901234/12345678901234", 0);
if(fd < 0){
printf("open 12345678901234/12345678901234/12345678901234 failed\n");
exit();
}
close(fd);
if(mkdir("12345678901234/12345678901234") == 0){
printf("mkdir 12345678901234/12345678901234 succeeded!\n");
exit();
}
if(mkdir("123456789012345/12345678901234") == 0){
printf("mkdir 12345678901234/123456789012345 succeeded!\n");
exit();
}
printf("fourteen ok\n");
}
void
rmdot(void)
{
printf("rmdot test\n");
if(mkdir("dots") != 0){
printf("mkdir dots failed\n");
exit();
}
if(chdir("dots") != 0){
printf("chdir dots failed\n");
exit();
}
if(unlink(".") == 0){
printf("rm . worked!\n");
exit();
}
if(unlink("..") == 0){
printf("rm .. worked!\n");
exit();
}
if(chdir("/") != 0){
printf("chdir / failed\n");
exit();
}
if(unlink("dots/.") == 0){
printf("unlink dots/. worked!\n");
exit();
}
if(unlink("dots/..") == 0){
printf("unlink dots/.. worked!\n");
exit();
}
if(unlink("dots") != 0){
printf("unlink dots failed!\n");
exit();
}
printf("rmdot ok\n");
}
void
dirfile(void)
{
int fd;
printf("dir vs file\n");
fd = open("dirfile", O_CREATE);
if(fd < 0){
printf("create dirfile failed\n");
exit();
}
close(fd);
if(chdir("dirfile") == 0){
printf("chdir dirfile succeeded!\n");
exit();
}
fd = open("dirfile/xx", 0);
if(fd >= 0){
printf("create dirfile/xx succeeded!\n");
exit();
}
fd = open("dirfile/xx", O_CREATE);
if(fd >= 0){
printf("create dirfile/xx succeeded!\n");
exit();
}
if(mkdir("dirfile/xx") == 0){
printf("mkdir dirfile/xx succeeded!\n");
exit();
}
if(unlink("dirfile/xx") == 0){
printf("unlink dirfile/xx succeeded!\n");
exit();
}
if(link("README", "dirfile/xx") == 0){
printf("link to dirfile/xx succeeded!\n");
exit();
}
if(unlink("dirfile") != 0){
printf("unlink dirfile failed!\n");
exit();
}
fd = open(".", O_RDWR);
if(fd >= 0){
printf("open . for writing succeeded!\n");
exit();
}
fd = open(".", 0);
if(write(fd, "x", 1) > 0){
printf("write . succeeded!\n");
exit();
}
close(fd);
printf("dir vs file OK\n");
}
// test that iput() is called at the end of _namei()
void
iref(void)
{
int i, fd;
printf("empty file name\n");
for(i = 0; i < NINODE + 1; i++){
if(mkdir("irefd") != 0){
printf("mkdir irefd failed\n");
exit();
}
if(chdir("irefd") != 0){
printf("chdir irefd failed\n");
exit();
}
mkdir("");
link("README", "");
fd = open("", O_CREATE);
if(fd >= 0)
close(fd);
fd = open("xx", O_CREATE);
if(fd >= 0)
close(fd);
unlink("xx");
}
chdir("/");
printf("empty file name OK\n");
}
// test that fork fails gracefully
// the forktest binary also does this, but it runs out of proc entries first.
// inside the bigger usertests binary, we run out of memory first.
void
forktest(void)
{
enum{ N = 1000 };
int n, pid;
printf("fork test\n");
for(n=0; n<N; n++){
pid = fork();
if(pid < 0)
break;
if(pid == 0)
exit();
}
if (n == 0) {
printf("no fork at all!\n");
exit();
}
if(n == N){
printf("fork claimed to work 1000 times!\n");
exit();
}
for(; n > 0; n--){
if(wait() < 0){
printf("wait stopped early\n");
exit();
}
}
if(wait() != -1){
printf("wait got too many\n");
exit();
}
printf("fork test OK\n");
}
void
sbrktest(void)
{
enum { BIG=100*1024*1024, TOOMUCH=1024*1024*1024};
int i, fds[2], pids[10], pid, ppid;
char *c, *oldbrk, scratch, *a, *b, *lastaddr, *p;
uint64 amt;
int fd;
int n;
printf("sbrk test\n");
oldbrk = sbrk(0);
// does sbrk() return the expected failure value?
a = sbrk(TOOMUCH);
if(a != (char*)0xffffffffffffffffL){
printf("sbrk(<toomuch>) returned %p\n", a);
exit();
}
// can one sbrk() less than a page?
a = sbrk(0);
for(i = 0; i < 5000; i++){
b = sbrk(1);
if(b != a){
printf("sbrk test failed %d %x %x\n", i, a, b);
exit();
}
*b = 1;
a = b + 1;
}
pid = fork();
if(pid < 0){
printf("sbrk test fork failed\n");
exit();
}
c = sbrk(1);
c = sbrk(1);
if(c != a + 1){
printf("sbrk test failed post-fork\n");
exit();
}
if(pid == 0)
exit();
wait();
// can one grow address space to something big?
a = sbrk(0);
amt = BIG - (uint64)a;
p = sbrk(amt);
if (p != a) {
printf("sbrk test failed to grow big address space; enough phys mem?\n");
exit();
}
lastaddr = (char*) (BIG-1);
*lastaddr = 99;
// can one de-allocate?
a = sbrk(0);
c = sbrk(-PGSIZE);
if(c == (char*)0xffffffffffffffffL){
printf("sbrk could not deallocate\n");
exit();
}
c = sbrk(0);
if(c != a - PGSIZE){
printf("sbrk deallocation produced wrong address, a %x c %x\n", a, c);
exit();
}
// can one re-allocate that page?
a = sbrk(0);
c = sbrk(PGSIZE);
if(c != a || sbrk(0) != a + PGSIZE){
printf("sbrk re-allocation failed, a %x c %x\n", a, c);
exit();
}
if(*lastaddr == 99){
// should be zero
printf("sbrk de-allocation didn't really deallocate\n");
exit();
}
a = sbrk(0);
c = sbrk(-(sbrk(0) - oldbrk));
if(c != a){
printf("sbrk downsize failed, a %x c %x\n", a, c);
exit();
}
// can we read the kernel's memory?
for(a = (char*)(KERNBASE); a < (char*) (KERNBASE+2000000); a += 50000){
ppid = getpid();
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid == 0){
printf("oops could read %x = %x\n", a, *a);
kill(ppid);
exit();
}
wait();
}
// if we run the system out of memory, does it clean up the last
// failed allocation?
if(pipe(fds) != 0){
printf("pipe() failed\n");
exit();
}
for(i = 0; i < sizeof(pids)/sizeof(pids[0]); i++){
if((pids[i] = fork()) == 0){
// allocate a lot of memory
sbrk(BIG - (uint64)sbrk(0));
write(fds[1], "x", 1);
// sit around until killed
for(;;) sleep(1000);
}
if(pids[i] != -1)
read(fds[0], &scratch, 1);
}
// if those failed allocations freed up the pages they did allocate,
// we'll be able to allocate here
c = sbrk(PGSIZE);
for(i = 0; i < sizeof(pids)/sizeof(pids[0]); i++){
if(pids[i] == -1)
continue;
kill(pids[i]);
wait();
}
if(c == (char*)0xffffffffffffffffL){
printf("failed sbrk leaked memory\n");
exit();
}
// test running fork with the above allocated page
ppid = getpid();
pid = fork();
if(pid < 0){
printf("fork failed\n");
exit();
}
// test out of memory during sbrk
if(pid == 0){
// allocate a lot of memory
a = sbrk(0);
sbrk(10*BIG);
int n = 0;
for (i = 0; i < 10*BIG; i += PGSIZE) {
n += *(a+i);
}
printf("allocate a lot of memory succeeded %d\n", n);
kill(ppid);
exit();
}
wait();
// test reads from allocated memory
a = sbrk(PGSIZE);
fd = open("sbrk", O_CREATE|O_WRONLY);
unlink("sbrk");
if(fd < 0) {
printf("open sbrk failed\n");
exit();
}
if ((n = write(fd, a, 10)) < 0) {
printf("write sbrk failed\n");
exit();
}
close(fd);
// test writes to allocated memory
a = sbrk(PGSIZE);
if(pipe((int *) a) != 0){
printf("pipe() failed\n");
exit();
}
if(sbrk(0) > oldbrk)
sbrk(-(sbrk(0) - oldbrk));
printf("sbrk test OK\n");
}
void
validatetest(void)
{
int hi;
uint64 p;
printf("validate test\n");
hi = 1100*1024;
for(p = 0; p <= (uint)hi; p += PGSIZE){
// try to crash the kernel by passing in a bad string pointer
if(link("nosuchfile", (char*)p) != -1){
printf("link should not succeed\n");
exit();
}
}
printf("validate ok\n");
}
// does unintialized data start out zero?
char uninit[10000];
void
bsstest(void)
{
int i;
printf("bss test\n");
for(i = 0; i < sizeof(uninit); i++){
if(uninit[i] != '\0'){
printf("bss test failed\n");
exit();
}
}
printf("bss test ok\n");
}
// does exec return an error if the arguments
// are larger than a page? or does it write
// below the stack and wreck the instructions/data?
void
bigargtest(void)
{
int pid, fd;
unlink("bigarg-ok");
pid = fork();
if(pid == 0){
static char *args[MAXARG];
int i;
for(i = 0; i < MAXARG-1; i++)
args[i] = "bigargs test: failed\n ";
args[MAXARG-1] = 0;
printf("bigarg test\n");
exec("echo", args);
printf("bigarg test ok\n");
fd = open("bigarg-ok", O_CREATE);
close(fd);
exit();
} else if(pid < 0){
printf("bigargtest: fork failed\n");
exit();
}
wait();
fd = open("bigarg-ok", 0);
if(fd < 0){
printf("bigarg test failed!\n");
exit();
}
close(fd);
unlink("bigarg-ok");
}
// what happens when the file system runs out of blocks?
// answer: balloc panics, so this test is not useful.
void
fsfull()
{
int nfiles;
int fsblocks = 0;
printf("fsfull test\n");
for(nfiles = 0; ; nfiles++){
char name[64];
name[0] = 'f';
name[1] = '0' + nfiles / 1000;
name[2] = '0' + (nfiles % 1000) / 100;
name[3] = '0' + (nfiles % 100) / 10;
name[4] = '0' + (nfiles % 10);
name[5] = '\0';
printf("writing %s\n", name);
int fd = open(name, O_CREATE|O_RDWR);
if(fd < 0){
printf("open %s failed\n", name);
break;
}
int total = 0;
while(1){
int cc = write(fd, buf, BSIZE);
if(cc < BSIZE)
break;
total += cc;
fsblocks++;
}
printf("wrote %d bytes\n", total);
close(fd);
if(total == 0)
break;
}
while(nfiles >= 0){
char name[64];
name[0] = 'f';
name[1] = '0' + nfiles / 1000;
name[2] = '0' + (nfiles % 1000) / 100;
name[3] = '0' + (nfiles % 100) / 10;
name[4] = '0' + (nfiles % 10);
name[5] = '\0';
unlink(name);
nfiles--;
}
printf("fsfull test finished\n");
}
void argptest()
{
int fd;
fd = open("init", O_RDONLY);
if (fd < 0) {
fprintf(2, "open failed\n");
exit();
}
read(fd, sbrk(0) - 1, -1);
close(fd);
printf("arg test passed\n");
}
unsigned long randstate = 1;
unsigned int
rand()
{
randstate = randstate * 1664525 + 1013904223;
return randstate;
}
// check that there's an invalid page beneath
// the user stack, to catch stack overflow.
void
stacktest()
{
int pid;
int ppid = getpid();
printf("stack guard test\n");
pid = fork();
if(pid == 0) {
char *sp = (char *) r_sp();
sp -= PGSIZE;
// the *sp should cause a trap.
printf("stacktest: read below stack %p\n", *sp);
printf("stacktest: test FAILED\n");
kill(ppid);
exit();
} else if(pid < 0){
printf("fork failed\n");
exit();
}
wait();
printf("stack guard test ok\n");
}
int
main(int argc, char *argv[])
{
printf("usertests starting\n");
if(open("usertests.ran", 0) >= 0){
printf("already ran user tests -- rebuild fs.img\n");
exit();
}
close(open("usertests.ran", O_CREATE));
reparent();
twochildren();
forkfork();
forkforkfork();
argptest();
createdelete();
linkunlink();
concreate();
fourfiles();
sharedfd();
bigargtest();
bigwrite();
bigargtest();
bsstest();
sbrktest();
validatetest();
stacktest();
opentest();
writetest();
writetest1();
createtest();
openiputtest();
exitiputtest();
iputtest();
mem();
pipe1();
preempt();
exitwait();
rmdot();
fourteen();
bigfile();
subdir();
linktest();
unlinkread();
dirfile();
iref();
forktest();
bigdir(); // slow
exectest();
exit();
}