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streamline copyin/copyout code in usertests

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fix bugs in read/write return values when there's an error
This commit is contained in:
Robert Morris 2020-08-07 15:06:43 -04:00 committed by Frans Kaashoek
parent a93321cb25
commit e3b7058907
4 changed files with 93 additions and 84 deletions
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2
kernel/console.c
View file

@ -76,7 +76,7 @@ consolewrite(int user_src, uint64 src, int n)
}
release(&cons.lock);
return n;
return i;
}
//

2
kernel/fs.c
View file

@ -472,7 +472,7 @@ readi(struct inode *ip, int user_dst, uint64 dst, uint off, uint n)
}
brelse(bp);
}
return n;
return tot;
}
// Write data to inode.

2
kernel/pipe.c
View file

@ -96,7 +96,7 @@ pipewrite(struct pipe *pi, uint64 addr, int n)
}
wakeup(&pi->nread);
release(&pi->lock);
return n;
return i;
}
int

121
user/usertests.c
View file

@ -23,89 +23,101 @@ char buf[BUFSZ];
char name[3];
void
copyin1(char *s)
copyin(char *s)
{
uint64 addrs[] = { 0x80000000LL, 0xffffffffffffffff };
for(int ai = 0; ai < 2; ai++){
uint64 addr = addrs[ai];
int fd = open("copyin1", O_CREATE|O_WRONLY);
if(fd < 0){
printf("open(copyin1) failed\n");
exit(1);
}
int n = write(fd, (void*)0x80000000LL, 8192);
int n = write(fd, (void*)addr, 8192);
if(n >= 0){
printf("write(fd, 0x80000000LL, 8192) did not fail!\n");
printf("write(fd, %p, 8192) returned %d, not -1\n", addr, n);
exit(1);
}
close(fd);
unlink("copyin1");
n = write(1, (char*)addr, 8192);
if(n > 0){
printf("write(1, %p, 8192) returned %d, not -1 or 0\n", addr, n);
exit(1);
}
int fds[2];
if(pipe(fds) < 0){
printf("pipe() failed\n");
exit(1);
}
n = write(fds[1], (char*)addr, 8192);
if(n > 0){
printf("write(pipe, %p, 8192) returned %d, not -1 or 0\n", addr, n);
exit(1);
}
close(fds[0]);
close(fds[1]);
}
}
void
copyin2(char *s)
copyout(char *s)
{
int fd = open("copyin2", O_CREATE|O_WRONLY);
if(fd < 0){
printf("open(copyin2) failed\n");
exit(1);
}
int n = write(fd, (void*)0xffffffffffffffffLL, 8192);
if(n >= 0){
printf("write(fd, 0xffffffffffffffffLL, 8192) did not fail!\n");
exit(1);
}
close(fd);
unlink("copyin2");
}
uint64 addrs[] = { 0x80000000LL, 0xffffffffffffffff };
for(int ai = 0; ai < 2; ai++){
uint64 addr = addrs[ai];
void
copyout1(char *s)
{
int fd = open("README", 0);
if(fd < 0){
printf("open(README) failed\n");
exit(1);
}
int n = read(fd, (void*)0x80000000LL, 8192);
if(n >= 0){
printf("read(fd, 0x80000000LL, 8192) returned %d, not -1\n", n);
int n = read(fd, (void*)addr, 8192);
if(n > 0){
printf("read(fd, %p, 8192) returned %d, not -1 or 0\n", addr, n);
exit(1);
}
close(fd);
int fds[2];
if(pipe(fds) < 0){
printf("pipe() failed\n");
exit(1);
}
n = write(fds[1], "x", 1);
if(n != 1){
printf("pipe write failed\n");
exit(1);
}
n = read(fds[0], (void*)addr, 8192);
if(n > 0){
printf("read(pipe, %p, 8192) returned %d, not -1 or 0\n", addr, n);
exit(1);
}
close(fds[0]);
close(fds[1]);
}
}
void
copyout2(char *s)
copyinstr(char *s)
{
int fd = open("README", 0);
if(fd < 0){
printf("open(README) failed\n");
exit(1);
}
int n = read(fd, (void*)0xffffffffffffffffLL, 8192);
if(n >= 0){
printf("read(fd, 0xffffffffffffffff, 8192) returned %d, not -1\n", n);
exit(1);
}
close(fd);
}
uint64 addrs[] = { 0x80000000LL, 0xffffffffffffffff };
void
copyinstr1(char *s)
{
int fd = open((char *)0x80000000LL, O_CREATE|O_WRONLY);
for(int ai = 0; ai < 2; ai++){
uint64 addr = addrs[ai];
int fd = open((char *)addr, O_CREATE|O_WRONLY);
if(fd >= 0){
printf("open(0x80000000) returned %d, not -1\n", fd);
printf("open(%p) returned %d, not -1\n", addr, fd);
exit(1);
}
}
void
copyinstr2(char *s)
{
int fd = open((char *)0xffffffffffffffff, O_CREATE|O_WRONLY);
if(fd >= 0){
printf("open(0xffffffffffffffff) returned %d, not -1\n", fd);
exit(1);
}
}
// test O_TRUNC.
@ -2393,12 +2405,9 @@ main(int argc, char *argv[])
void (*f)(char *);
char *s;
} tests[] = {
{copyin1, "copyin1"},
{copyin2, "copyin2"},
{copyout1, "copyout1"},
{copyout2, "copyout2"},
{copyinstr1, "copyinstr1"},
{copyinstr2, "copyinstr2"},
{copyin, "copyin"},
{copyout, "copyout"},
{copyinstr, "copyinstr"},
{truncate1, "truncate1"},
{truncate2, "truncate2"},
{truncate3, "truncate3"},