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xv6/usertests.c

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Initial commit
2023-01-04 17:04:31 +01:00
#include "param.h"
#include "types.h"
#include "stat.h"
#include "user.h"
#include "fs.h"
#include "fcntl.h"
#include "syscall.h"
#include "traps.h"
#include "memlayout.h"
char buf[8192];
char name[3];
char *echoargv[] = { "echo", "ALL", "TESTS", "PASSED", 0 };
int stdout = 1;
// does chdir() call iput(p->cwd) in a transaction?
void iputtest(void) {
printf(stdout, "iput test\n");
if (mkdir("iputdir") < 0) {
printf(stdout, "mkdir failed\n");
exit();
}
if (chdir("iputdir") < 0) {
printf(stdout, "chdir iputdir failed\n");
exit();
}
if (unlink("../iputdir") < 0) {
printf(stdout, "unlink ../iputdir failed\n");
exit();
}
if (chdir("/") < 0) {
printf(stdout, "chdir / failed\n");
exit();
}
printf(stdout, "iput test ok\n");
}
// does exit() call iput(p->cwd) in a transaction?
void exitiputtest(void) {
int pid;
printf(stdout, "exitiput test\n");
pid = fork();
if (pid < 0) {
printf(stdout, "fork failed\n");
exit();
}
if (pid == 0) {
if (mkdir("iputdir") < 0) {
printf(stdout, "mkdir failed\n");
exit();
}
if (chdir("iputdir") < 0) {
printf(stdout, "child chdir failed\n");
exit();
}
if (unlink("../iputdir") < 0) {
printf(stdout, "unlink ../iputdir failed\n");
exit();
}
exit();
}
wait();
printf(stdout, "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(stdout, "openiput test\n");
if (mkdir("oidir") < 0) {
printf(stdout, "mkdir oidir failed\n");
exit();
}
pid = fork();
if (pid < 0) {
printf(stdout, "fork failed\n");
exit();
}
if (pid == 0) {
int fd = open("oidir", O_RDWR);
if (fd >= 0) {
printf(stdout, "open directory for write succeeded\n");
exit();
}
exit();
}
sleep(1);
if (unlink("oidir") != 0) {
printf(stdout, "unlink failed\n");
exit();
}
wait();
printf(stdout, "openiput test ok\n");
}
// simple file system tests
void opentest(void) {
int fd;
printf(stdout, "open test\n");
fd = open("echo", 0);
if (fd < 0) {
printf(stdout, "open echo failed!\n");
exit();
}
close(fd);
fd = open("doesnotexist", 0);
if (fd >= 0) {
printf(stdout, "open doesnotexist succeeded!\n");
exit();
}
printf(stdout, "open test ok\n");
}
void writetest(void) {
int fd;
int i;
printf(stdout, "small file test\n");
fd = open("small", O_CREATE | O_RDWR);
if (fd >= 0) {
printf(stdout, "creat small succeeded; ok\n");
}
else {
printf(stdout, "error: creat small failed!\n");
exit();
}
for (i = 0; i < 100; i++) {
if (write(fd, "aaaaaaaaaa", 10) != 10) {
printf(stdout, "error: write aa %d new file failed\n", i);
exit();
}
if (write(fd, "bbbbbbbbbb", 10) != 10) {
printf(stdout, "error: write bb %d new file failed\n", i);
exit();
}
}
printf(stdout, "writes ok\n");
close(fd);
fd = open("small", O_RDONLY);
if (fd >= 0) {
printf(stdout, "open small succeeded ok\n");
}
else {
printf(stdout, "error: open small failed!\n");
exit();
}
i = read(fd, buf, 2000);
if (i == 2000) {
printf(stdout, "read succeeded ok\n");
}
else {
printf(stdout, "read failed\n");
exit();
}
close(fd);
if (unlink("small") < 0) {
printf(stdout, "unlink small failed\n");
exit();
}
printf(stdout, "small file test ok\n");
}
void writetest1(void) {
int i, fd, n;
printf(stdout, "big files test\n");
fd = open("big", O_CREATE | O_RDWR);
if (fd < 0) {
printf(stdout, "error: creat big failed!\n");
exit();
}
for (i = 0; i < MAXFILE; i++) {
((int*)buf)[0] = i;
if (write(fd, buf, 512) != 512) {
printf(stdout, "error: write big file failed\n", i);
exit();
}
}
close(fd);
fd = open("big", O_RDONLY);
if (fd < 0) {
printf(stdout, "error: open big failed!\n");
exit();
}
n = 0;
for (;;) {
i = read(fd, buf, 512);
if (i == 0) {
if (n == MAXFILE - 1) {
printf(stdout, "read only %d blocks from big", n);
exit();
}
break;
}
else if (i != 512) {
printf(stdout, "read failed %d\n", i);
exit();
}
if (((int*)buf)[0] != n) {
printf(stdout, "read content of block %d is %d\n",
n, ((int*)buf)[0]);
exit();
}
n++;
}
close(fd);
if (unlink("big") < 0) {
printf(stdout, "unlink big failed\n");
exit();
}
printf(stdout, "big files ok\n");
}
void createtest(void) {
int i, fd;
printf(stdout, "many creates, followed by unlink test\n");
name[0] = 'a';
name[2] = '\0';
for (i = 0; i < 52; i++) {
name[1] = '0' + i;
fd = open(name, O_CREATE | O_RDWR);
close(fd);
}
name[0] = 'a';
name[2] = '\0';
for (i = 0; i < 52; i++) {
name[1] = '0' + i;
unlink(name);
}
printf(stdout, "many creates, followed by unlink; ok\n");
}
void dirtest(void){
printf(stdout, "mkdir test\n");
if (mkdir("dir0") < 0) {
printf(stdout, "mkdir failed\n");
exit();
}
if (chdir("dir0") < 0) {
printf(stdout, "chdir dir0 failed\n");
exit();
}
if (chdir("..") < 0) {
printf(stdout, "chdir .. failed\n");
exit();
}
if (unlink("dir0") < 0) {
printf(stdout, "unlink dir0 failed\n");
exit();
}
printf(stdout, "mkdir test ok\n");
}
void exectest(void) {
printf(stdout, "exec test\n");
if (exec("echo", echoargv) < 0) {
printf(stdout, "exec echo failed\n");
exit();
}
}
// simple fork and pipe read/write
void pipe1(void) {
int fds[2], pid;
int seq, i, n, cc, total;
if (pipe(fds) != 0) {
printf(1, "pipe() failed\n");
exit();
}
pid = fork();
seq = 0;
if (pid == 0) {
close(fds[0]);
for (n = 0; n < 5; n++) {
for (i = 0; i < 1033; i++) {
buf[i] = seq++;
}
if (write(fds[1], buf, 1033) != 1033) {
printf(1, "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(1, "pipe1 oops 2\n");
return;
}
}
total += n;
cc = cc * 2;
if (cc > sizeof(buf)) {
cc = sizeof(buf);
}
}
if (total != 5 * 1033) {
printf(1, "pipe1 oops 3 total %d\n", total);
exit();
}
close(fds[0]);
wait();
}
else {
printf(1, "fork() failed\n");
exit();
}
printf(1, "pipe1 ok\n");
}
// meant to be run w/ at most two CPUs
void preempt(void) {
int pid1, pid2, pid3;
int pfds[2];
printf(1, "preempt: ");
pid1 = fork();
if (pid1 == 0) {
for (;;) {
;
}
}
pid2 = fork();
if (pid2 == 0) {
for (;;) {
;
}
}
pipe(pfds);
pid3 = fork();
if (pid3 == 0) {
close(pfds[0]);
if (write(pfds[1], "x", 1) != 1) {
printf(1, "preempt write error");
}
close(pfds[1]);
for (;;) {
;
}
}
close(pfds[1]);
if (read(pfds[0], buf, sizeof(buf)) != 1) {
printf(1, "preempt read error");
return;
}
close(pfds[0]);
printf(1, "kill... ");
kill(pid1);
kill(pid2);
kill(pid3);
printf(1, "wait... ");
wait();
wait();
wait();
printf(1, "preempt ok\n");
}
// try to find any races between exit and wait
void exitwait(void) {
int i, pid;
for (i = 0; i < 100; i++) {
pid = fork();
if (pid < 0) {
printf(1, "fork failed\n");
return;
}
if (pid) {
if (wait() != pid) {
printf(1, "wait wrong pid\n");
return;
}
}
else {
exit();
}
}
printf(1, "exitwait ok\n");
}
void mem(void) {
void *m1, *m2;
int pid, ppid;
printf(1, "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(1, "couldn't allocate mem?!!\n");
kill(ppid);
exit();
}
free(m1);
printf(1, "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;
char buf[10];
printf(1, "sharedfd test\n");
unlink("sharedfd");
fd = open("sharedfd", O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "fstests: cannot open sharedfd for writing");
return;
}
pid = fork();
memset(buf, pid == 0 ? 'c' : 'p', sizeof(buf));
for (i = 0; i < 1000; i++) {
if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
printf(1, "fstests: write sharedfd failed\n");
break;
}
}
if (pid == 0) {
exit();
}
else {
wait();
}
close(fd);
fd = open("sharedfd", 0);
if (fd < 0) {
printf(1, "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 == 10000 && np == 10000) {
printf(1, "sharedfd ok\n");
}
else {
printf(1, "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;
printf(1, "fourfiles test\n");
for (pi = 0; pi < 4; pi++) {
fname = names[pi];
unlink(fname);
pid = fork();
if (pid < 0) {
printf(1, "fork failed\n");
exit();
}
if (pid == 0) {
fd = open(fname, O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "create failed\n");
exit();
}
memset(buf, '0' + pi, 512);
for (i = 0; i < 12; i++) {
if ((n = write(fd, buf, 500)) != 500) {
printf(1, "write failed %d\n", n);
exit();
}
}
exit();
}
}
for (pi = 0; pi < 4; pi++) {
wait();
}
for (i = 0; i < 2; 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(1, "wrong char\n");
exit();
}
}
total += n;
}
close(fd);
if (total != 12 * 500) {
printf(1, "wrong length %d\n", total);
exit();
}
unlink(fname);
}
printf(1, "fourfiles ok\n");
}
// four processes create and delete different files in same directory
void createdelete(void) {
enum { N = 20 };
int pid, i, fd, pi;
char name[32];
printf(1, "createdelete test\n");
for (pi = 0; pi < 4; pi++) {
pid = fork();
if (pid < 0) {
printf(1, "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(1, "create failed\n");
exit();
}
close(fd);
if (i > 0 && (i % 2) == 0) {
name[1] = '0' + (i / 2);
if (unlink(name) < 0) {
printf(1, "unlink failed\n");
exit();
}
}
}
exit();
}
}
for (pi = 0; pi < 4; pi++) {
wait();
}
name[0] = name[1] = name[2] = 0;
for (i = 0; i < N; i++) {
for (pi = 0; pi < 4; pi++) {
name[0] = 'p' + pi;
name[1] = '0' + i;
fd = open(name, 0);
if ((i == 0 || i >= N / 2) && fd < 0) {
printf(1, "oops createdelete %s didn't exist\n", name);
exit();
}
else if ((i >= 1 && i < N / 2) && fd >= 0) {
printf(1, "oops createdelete %s did exist\n", name);
exit();
}
if (fd >= 0) {
close(fd);
}
}
}
for (i = 0; i < N; i++) {
for (pi = 0; pi < 4; pi++) {
name[0] = 'p' + i;
name[1] = '0' + i;
unlink(name);
}
}
printf(1, "createdelete ok\n");
}
// can I unlink a file and still read it?
void unlinkread(void) {
int fd, fd1;
printf(1, "unlinkread test\n");
fd = open("unlinkread", O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "create unlinkread failed\n");
exit();
}
write(fd, "hello", 5);
close(fd);
fd = open("unlinkread", O_RDWR);
if (fd < 0) {
printf(1, "open unlinkread failed\n");
exit();
}
if (unlink("unlinkread") != 0) {
printf(1, "unlink unlinkread failed\n");
exit();
}
fd1 = open("unlinkread", O_CREATE | O_RDWR);
write(fd1, "yyy", 3);
close(fd1);
if (read(fd, buf, sizeof(buf)) != 5) {
printf(1, "unlinkread read failed");
exit();
}
if (buf[0] != 'h') {
printf(1, "unlinkread wrong data\n");
exit();
}
if (write(fd, buf, 10) != 10) {
printf(1, "unlinkread write failed\n");
exit();
}
close(fd);
unlink("unlinkread");
printf(1, "unlinkread ok\n");
}
void linktest(void) {
int fd;
printf(1, "linktest\n");
unlink("lf1");
unlink("lf2");
fd = open("lf1", O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "create lf1 failed\n");
exit();
}
if (write(fd, "hello", 5) != 5) {
printf(1, "write lf1 failed\n");
exit();
}
close(fd);
if (link("lf1", "lf2") < 0) {
printf(1, "link lf1 lf2 failed\n");
exit();
}
unlink("lf1");
if (open("lf1", 0) >= 0) {
printf(1, "unlinked lf1 but it is still there!\n");
exit();
}
fd = open("lf2", 0);
if (fd < 0) {
printf(1, "open lf2 failed\n");
exit();
}
if (read(fd, buf, sizeof(buf)) != 5) {
printf(1, "read lf2 failed\n");
exit();
}
close(fd);
if (link("lf2", "lf2") >= 0) {
printf(1, "link lf2 lf2 succeeded! oops\n");
exit();
}
unlink("lf2");
if (link("lf2", "lf1") >= 0) {
printf(1, "link non-existant succeeded! oops\n");
exit();
}
if (link(".", "lf1") >= 0) {
printf(1, "link . lf1 succeeded! oops\n");
exit();
}
printf(1, "linktest ok\n");
}
// test concurrent create/link/unlink of the same file
void concreate(void) {
char file[3];
int i, pid, n, fd;
char fa[40];
struct {
ushort inum;
char name[14];
} de;
printf(1, "concreate test\n");
file[0] = 'C';
file[2] = '\0';
for (i = 0; i < 40; 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(1, "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(1, "concreate weird file %s\n", de.name);
exit();
}
if (fa[i]) {
printf(1, "concreate duplicate file %s\n", de.name);
exit();
}
fa[i] = 1;
n++;
}
}
close(fd);
if (n != 40) {
printf(1, "concreate not enough files in directory listing\n");
exit();
}
for (i = 0; i < 40; i++) {
file[1] = '0' + i;
pid = fork();
if (pid < 0) {
printf(1, "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(1, "concreate ok\n");
}
// another concurrent link/unlink/create test,
// to look for deadlocks.
void linkunlink() {
int pid, i;
printf(1, "linkunlink test\n");
unlink("x");
pid = fork();
if (pid < 0) {
printf(1, "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(1, "linkunlink ok\n");
}
// directory that uses indirect blocks
void bigdir(void) {
int i, fd;
char name[10];
printf(1, "bigdir test\n");
unlink("bd");
fd = open("bd", O_CREATE);
if (fd < 0) {
printf(1, "bigdir create failed\n");
exit();
}
close(fd);
for (i = 0; i < 500; i++) {
name[0] = 'x';
name[1] = '0' + (i / 64);
name[2] = '0' + (i % 64);
name[3] = '\0';
if (link("bd", name) != 0) {
printf(1, "bigdir link failed\n");
exit();
}
}
unlink("bd");
for (i = 0; i < 500; i++) {
name[0] = 'x';
name[1] = '0' + (i / 64);
name[2] = '0' + (i % 64);
name[3] = '\0';
if (unlink(name) != 0) {
printf(1, "bigdir unlink failed");
exit();
}
}
printf(1, "bigdir ok\n");
}
void subdir(void) {
int fd, cc;
printf(1, "subdir test\n");
unlink("ff");
if (mkdir("dd") != 0) {
printf(1, "subdir mkdir dd failed\n");
exit();
}
fd = open("dd/ff", O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "create dd/ff failed\n");
exit();
}
write(fd, "ff", 2);
close(fd);
if (unlink("dd") >= 0) {
printf(1, "unlink dd (non-empty dir) succeeded!\n");
exit();
}
if (mkdir("/dd/dd") != 0) {
printf(1, "subdir mkdir dd/dd failed\n");
exit();
}
fd = open("dd/dd/ff", O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "create dd/dd/ff failed\n");
exit();
}
write(fd, "FF", 2);
close(fd);
fd = open("dd/dd/../ff", 0);
if (fd < 0) {
printf(1, "open dd/dd/../ff failed\n");
exit();
}
cc = read(fd, buf, sizeof(buf));
if (cc != 2 || buf[0] != 'f') {
printf(1, "dd/dd/../ff wrong content\n");
exit();
}
close(fd);
if (link("dd/dd/ff", "dd/dd/ffff") != 0) {
printf(1, "link dd/dd/ff dd/dd/ffff failed\n");
exit();
}
if (unlink("dd/dd/ff") != 0) {
printf(1, "unlink dd/dd/ff failed\n");
exit();
}
if (open("dd/dd/ff", O_RDONLY) >= 0) {
printf(1, "open (unlinked) dd/dd/ff succeeded\n");
exit();
}
if (chdir("dd") != 0) {
printf(1, "chdir dd failed\n");
exit();
}
if (chdir("dd/../../dd") != 0) {
printf(1, "chdir dd/../../dd failed\n");
exit();
}
if (chdir("dd/../../../dd") != 0) {
printf(1, "chdir dd/../../dd failed\n");
exit();
}
if (chdir("./..") != 0) {
printf(1, "chdir ./.. failed\n");
exit();
}
fd = open("dd/dd/ffff", 0);
if (fd < 0) {
printf(1, "open dd/dd/ffff failed\n");
exit();
}
if (read(fd, buf, sizeof(buf)) != 2) {
printf(1, "read dd/dd/ffff wrong len\n");
exit();
}
close(fd);
if (open("dd/dd/ff", O_RDONLY) >= 0) {
printf(1, "open (unlinked) dd/dd/ff succeeded!\n");
exit();
}
if (open("dd/ff/ff", O_CREATE | O_RDWR) >= 0) {
printf(1, "create dd/ff/ff succeeded!\n");
exit();
}
if (open("dd/xx/ff", O_CREATE | O_RDWR) >= 0) {
printf(1, "create dd/xx/ff succeeded!\n");
exit();
}
if (open("dd", O_CREATE) >= 0) {
printf(1, "create dd succeeded!\n");
exit();
}
if (open("dd", O_RDWR) >= 0) {
printf(1, "open dd rdwr succeeded!\n");
exit();
}
if (open("dd", O_WRONLY) >= 0) {
printf(1, "open dd wronly succeeded!\n");
exit();
}
if (link("dd/ff/ff", "dd/dd/xx") == 0) {
printf(1, "link dd/ff/ff dd/dd/xx succeeded!\n");
exit();
}
if (link("dd/xx/ff", "dd/dd/xx") == 0) {
printf(1, "link dd/xx/ff dd/dd/xx succeeded!\n");
exit();
}
if (link("dd/ff", "dd/dd/ffff") == 0) {
printf(1, "link dd/ff dd/dd/ffff succeeded!\n");
exit();
}
if (mkdir("dd/ff/ff") == 0) {
printf(1, "mkdir dd/ff/ff succeeded!\n");
exit();
}
if (mkdir("dd/xx/ff") == 0) {
printf(1, "mkdir dd/xx/ff succeeded!\n");
exit();
}
if (mkdir("dd/dd/ffff") == 0) {
printf(1, "mkdir dd/dd/ffff succeeded!\n");
exit();
}
if (unlink("dd/xx/ff") == 0) {
printf(1, "unlink dd/xx/ff succeeded!\n");
exit();
}
if (unlink("dd/ff/ff") == 0) {
printf(1, "unlink dd/ff/ff succeeded!\n");
exit();
}
if (chdir("dd/ff") == 0) {
printf(1, "chdir dd/ff succeeded!\n");
exit();
}
if (chdir("dd/xx") == 0) {
printf(1, "chdir dd/xx succeeded!\n");
exit();
}
if (unlink("dd/dd/ffff") != 0) {
printf(1, "unlink dd/dd/ff failed\n");
exit();
}
if (unlink("dd/ff") != 0) {
printf(1, "unlink dd/ff failed\n");
exit();
}
if (unlink("dd") == 0) {
printf(1, "unlink non-empty dd succeeded!\n");
exit();
}
if (unlink("dd/dd") < 0) {
printf(1, "unlink dd/dd failed\n");
exit();
}
if (unlink("dd") < 0) {
printf(1, "unlink dd failed\n");
exit();
}
printf(1, "subdir ok\n");
}
// test writes that are larger than the log.
void bigwrite(void) {
int fd, sz;
printf(1, "bigwrite test\n");
unlink("bigwrite");
for (sz = 499; sz < 12 * 512; sz += 471) {
fd = open("bigwrite", O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "cannot create bigwrite\n");
exit();
}
int i;
for (i = 0; i < 2; i++) {
int cc = write(fd, buf, sz);
if (cc != sz) {
printf(1, "write(%d) ret %d\n", sz, cc);
exit();
}
}
close(fd);
unlink("bigwrite");
}
printf(1, "bigwrite ok\n");
}
void bigfile(void) {
int fd, i, total, cc;
printf(1, "bigfile test\n");
unlink("bigfile");
fd = open("bigfile", O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "cannot create bigfile");
exit();
}
for (i = 0; i < 20; i++) {
memset(buf, i, 600);
if (write(fd, buf, 600) != 600) {
printf(1, "write bigfile failed\n");
exit();
}
}
close(fd);
fd = open("bigfile", 0);
if (fd < 0) {
printf(1, "cannot open bigfile\n");
exit();
}
total = 0;
for (i = 0;; i++) {
cc = read(fd, buf, 300);
if (cc < 0) {
printf(1, "read bigfile failed\n");
exit();
}
if (cc == 0) {
break;
}
if (cc != 300) {
printf(1, "short read bigfile\n");
exit();
}
if (buf[0] != i / 2 || buf[299] != i / 2) {
printf(1, "read bigfile wrong data\n");
exit();
}
total += cc;
}
close(fd);
if (total != 20 * 600) {
printf(1, "read bigfile wrong total\n");
exit();
}
unlink("bigfile");
printf(1, "bigfile test ok\n");
}
void fourteen(void) {
int fd;
// DIRSIZ is 14.
printf(1, "fourteen test\n");
if (mkdir("12345678901234") != 0) {
printf(1, "mkdir 12345678901234 failed\n");
exit();
}
if (mkdir("12345678901234/123456789012345") != 0) {
printf(1, "mkdir 12345678901234/123456789012345 failed\n");
exit();
}
fd = open("123456789012345/123456789012345/123456789012345", O_CREATE);
if (fd < 0) {
printf(1, "create 123456789012345/123456789012345/123456789012345 failed\n");
exit();
}
close(fd);
fd = open("12345678901234/12345678901234/12345678901234", 0);
if (fd < 0) {
printf(1, "open 12345678901234/12345678901234/12345678901234 failed\n");
exit();
}
close(fd);
if (mkdir("12345678901234/12345678901234") == 0) {
printf(1, "mkdir 12345678901234/12345678901234 succeeded!\n");
exit();
}
if (mkdir("123456789012345/12345678901234") == 0) {
printf(1, "mkdir 12345678901234/123456789012345 succeeded!\n");
exit();
}
printf(1, "fourteen ok\n");
}
void rmdot(void) {
printf(1, "rmdot test\n");
if (mkdir("dots") != 0) {
printf(1, "mkdir dots failed\n");
exit();
}
if (chdir("dots") != 0) {
printf(1, "chdir dots failed\n");
exit();
}
if (unlink(".") == 0) {
printf(1, "rm . worked!\n");
exit();
}
if (unlink("..") == 0) {
printf(1, "rm .. worked!\n");
exit();
}
if (chdir("/") != 0) {
printf(1, "chdir / failed\n");
exit();
}
if (unlink("dots/.") == 0) {
printf(1, "unlink dots/. worked!\n");
exit();
}
if (unlink("dots/..") == 0) {
printf(1, "unlink dots/.. worked!\n");
exit();
}
if (unlink("dots") != 0) {
printf(1, "unlink dots failed!\n");
exit();
}
printf(1, "rmdot ok\n");
}
void dirfile(void) {
int fd;
printf(1, "dir vs file\n");
fd = open("dirfile", O_CREATE);
if (fd < 0) {
printf(1, "create dirfile failed\n");
exit();
}
close(fd);
if (chdir("dirfile") == 0) {
printf(1, "chdir dirfile succeeded!\n");
exit();
}
fd = open("dirfile/xx", 0);
if (fd >= 0) {
printf(1, "create dirfile/xx succeeded!\n");
exit();
}
fd = open("dirfile/xx", O_CREATE);
if (fd >= 0) {
printf(1, "create dirfile/xx succeeded!\n");
exit();
}
if (mkdir("dirfile/xx") == 0) {
printf(1, "mkdir dirfile/xx succeeded!\n");
exit();
}
if (unlink("dirfile/xx") == 0) {
printf(1, "unlink dirfile/xx succeeded!\n");
exit();
}
if (link("README", "dirfile/xx") == 0) {
printf(1, "link to dirfile/xx succeeded!\n");
exit();
}
if (unlink("dirfile") != 0) {
printf(1, "unlink dirfile failed!\n");
exit();
}
fd = open(".", O_RDWR);
if (fd >= 0) {
printf(1, "open . for writing succeeded!\n");
exit();
}
fd = open(".", 0);
if (write(fd, "x", 1) > 0) {
printf(1, "write . succeeded!\n");
exit();
}
close(fd);
printf(1, "dir vs file OK\n");
}
// test that iput() is called at the end of _namei()
void iref(void) {
int i, fd;
printf(1, "empty file name\n");
// the 50 is NINODE
for (i = 0; i < 50 + 1; i++) {
if (mkdir("irefd") != 0) {
printf(1, "mkdir irefd failed\n");
exit();
}
if (chdir("irefd") != 0) {
printf(1, "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(1, "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) {
int n, pid;
printf(1, "fork test\n");
for (n = 0; n < 1000; n++) {
pid = fork();
if (pid < 0) {
break;
}
if (pid == 0) {
exit();
}
}
if (n == 1000) {
printf(1, "fork claimed to work 1000 times!\n");
exit();
}
for (; n > 0; n--) {
if (wait() < 0) {
printf(1, "wait stopped early\n");
exit();
}
}
if (wait() != -1) {
printf(1, "wait got too many\n");
exit();
}
printf(1, "fork test OK\n");
}
void sbrktest(void) {
int fds[2], pid, pids[10], ppid;
char *a, *b, *c, *lastaddr, *oldbrk, *p, scratch;
uint amt;
printf(stdout, "sbrk test\n");
oldbrk = sbrk(0);
// can one sbrk() less than a page?
a = sbrk(0);
int i;
for (i = 0; i < 5000; i++) {
b = sbrk(1);
if (b != a) {
printf(stdout, "sbrk test failed %d %x %x\n", i, a, b);
exit();
}
*b = 1;
a = b + 1;
}
pid = fork();
if (pid < 0) {
printf(stdout, "sbrk test fork failed\n");
exit();
}
c = sbrk(1);
c = sbrk(1);
if (c != a + 1) {
printf(stdout, "sbrk test failed post-fork\n");
exit();
}
if (pid == 0) {
exit();
}
wait();
// can one grow address space to something big?
#define BIG (100 * 1024 * 1024)
a = sbrk(0);
amt = (BIG) -(uint)a;
p = sbrk(amt);
if (p != a) {
printf(stdout, "sbrk test failed to grow big address space; enough phys mem?\n");
exit();
}
lastaddr = (char*) (BIG - 1);
#pragma GCC diagnostic ignored "-Wstringop-overflow"
*lastaddr = 99;
// can one de-allocate?
a = sbrk(0);
c = sbrk(-4096);
if (c == (char*)0xffffffff) {
printf(stdout, "sbrk could not deallocate\n");
exit();
}
c = sbrk(0);
if (c != a - 4096) {
printf(stdout, "sbrk deallocation produced wrong address, a %x c %x\n", a, c);
exit();
}
// can one re-allocate that page?
a = sbrk(0);
c = sbrk(4096);
if (c != a || sbrk(0) != a + 4096) {
printf(stdout, "sbrk re-allocation failed, a %x c %x\n", a, c);
exit();
}
if (*lastaddr == 99) {
// should be zero
printf(stdout, "sbrk de-allocation didn't really deallocate\n");
exit();
}
a = sbrk(0);
c = sbrk(-(sbrk(0) - oldbrk));
if (c != a) {
printf(stdout, "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(stdout, "fork failed\n");
exit();
}
if (pid == 0) {
printf(stdout, "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(1, "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 - (uint)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(4096);
for (i = 0; i < sizeof(pids) / sizeof(pids[0]); i++) {
if (pids[i] == -1) {
continue;
}
kill(pids[i]);
wait();
}
if (c == (char*)0xffffffff) {
printf(stdout, "failed sbrk leaked memory\n");
exit();
}
if (sbrk(0) > oldbrk) {
sbrk(-(sbrk(0) - oldbrk));
}
printf(stdout, "sbrk test OK\n");
}
void validateint(int *p) {
int res;
asm ("mov %%esp, %%ebx\n\t"
"mov %3, %%esp\n\t"
"int %2\n\t"
"mov %%ebx, %%esp" :
"=a" (res) :
"a" (SYS_sleep), "n" (T_SYSCALL), "c" (p) :
"ebx");
}
void validatetest(void) {
int hi, pid;
uint p;
printf(stdout, "validate test\n");
hi = 1100 * 1024;
for (p = 0; p <= (uint)hi; p += 4096) {
if ((pid = fork()) == 0) {
// try to crash the kernel by passing in a badly placed integer
validateint((int*)p);
exit();
}
sleep(0);
sleep(0);
kill(pid);
wait();
// try to crash the kernel by passing in a bad string pointer
if (link("nosuchfile", (char*)p) != -1) {
printf(stdout, "link should not succeed\n");
exit();
}
}
printf(stdout, "validate ok\n");
}
// does unintialized data start out zero?
char uninit[10000];
void bsstest(void) {
int i;
printf(stdout, "bss test\n");
for (i = 0; i < sizeof(uninit); i++) {
if (uninit[i] != '\0') {
printf(stdout, "bss test failed\n");
exit();
}
}
printf(stdout, "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(stdout, "bigarg test\n");
exec("echo", args);
printf(stdout, "bigarg test ok\n");
fd = open("bigarg-ok", O_CREATE);
close(fd);
exit();
}
else if (pid < 0) {
printf(stdout, "bigargtest: fork failed\n");
exit();
}
wait();
fd = open("bigarg-ok", 0);
if (fd < 0) {
printf(stdout, "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(1, "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(1, "writing %s\n", name);
int fd = open(name, O_CREATE | O_RDWR);
if (fd < 0) {
printf(1, "open %s failed\n", name);
break;
}
int total = 0;
while (1) {
int cc = write(fd, buf, 512);
if (cc < 512) {
break;
}
total += cc;
fsblocks++;
}
printf(1, "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(1, "fsfull test finished\n");
}
void uio() {
#define RTC_ADDR 0x70
#define RTC_DATA 0x71
ushort port = 0;
uchar val = 0;
int pid;
printf(1, "uio test\n");
pid = fork();
if (pid == 0) {
port = RTC_ADDR;
val = 0x09; /* year */
/* http://wiki.osdev.org/Inline_Assembly/Examples */
asm volatile ("outb %0,%1" : : "a" (val), "d" (port));
port = RTC_DATA;
asm volatile ("inb %1,%0" : "=a" (val) : "d" (port));
printf(1, "uio: uio succeeded; test FAILED\n");
exit();
}
else if (pid < 0) {
printf(1, "fork failed\n");
exit();
}
wait();
printf(1, "uio test done\n");
}
void argptest(){
int fd;
fd = open("init", O_RDONLY);
if (fd < 0) {
printf(2, "open failed\n");
exit();
}
read(fd, sbrk(0) - 1, -1);
close(fd);
printf(1, "arg test passed\n");
}
unsigned long randstate = 1;
unsigned int rand() {
randstate = randstate * 1664525 + 1013904223;
return randstate;
}
int main(int argc, char *argv[]) {
printf(1, "usertests starting\n");
if (open("usertests.ran", 0) >= 0) {
printf(1, "already ran user tests -- rebuild fs.img\n");
exit();
}
close(open("usertests.ran", O_CREATE));
argptest();
createdelete();
linkunlink();
concreate();
fourfiles();
sharedfd();
bigargtest();
bigwrite();
bigargtest();
bsstest();
sbrktest();
validatetest();
opentest();
writetest();
writetest1();
createtest();
openiputtest();
exitiputtest();
iputtest();
mem();
pipe1();
preempt();
exitwait();
rmdot();
fourteen();
bigfile();
subdir();
linktest();
unlinkread();
dirfile();
iref();
forktest();
bigdir(); // slow
uio();
exectest();
exit();
}