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|
use proptest::prelude::*;
use wiggle::{GuestMemory, GuestPtr};
use wiggle_test::{impl_errno, HostMemory, MemArea, MemAreas, WasiCtx};
wiggle::from_witx!({
witx: ["$CARGO_MANIFEST_DIR/tests/strings.witx"],
});
impl_errno!(types::Errno);
impl<'a> strings::Strings for WasiCtx<'a> {
fn hello_string(
&mut self,
memory: &mut GuestMemory<'_>,
a_string: GuestPtr<str>,
) -> Result<u32, types::Errno> {
let s = memory
.as_str(a_string)
.expect("should be valid string")
.expect("expected non-shared memory");
println!("a_string='{}'", &*s);
Ok(s.len() as u32)
}
fn multi_string(
&mut self,
memory: &mut GuestMemory<'_>,
a: GuestPtr<str>,
b: GuestPtr<str>,
c: GuestPtr<str>,
) -> Result<u32, types::Errno> {
let sa = memory
.as_str(a)
.expect("A should be valid string")
.expect("expected non-shared memory");
let sb = memory
.as_str(b)
.expect("B should be valid string")
.expect("expected non-shared memory");
let sc = memory
.as_str(c)
.expect("C should be valid string")
.expect("expected non-shared memory");
let total_len = sa.len() + sb.len() + sc.len();
println!(
"len={}, a='{}', b='{}', c='{}'",
total_len, &*sa, &*sb, &*sc
);
Ok(total_len as u32)
}
}
fn unicode_string_strategy() -> impl Strategy<Value = String> {
"\\p{Greek}{1,256}"
}
fn ascii_string_strategy() -> impl Strategy<Value = String> {
"[a-zA-Z0..9]{1,256}"
}
#[derive(Debug)]
struct HelloStringExercise {
test_word: String,
string_ptr_loc: MemArea,
return_ptr_loc: MemArea,
}
impl HelloStringExercise {
pub fn strat() -> BoxedStrategy<Self> {
(unicode_string_strategy(),)
.prop_flat_map(|(test_word,)| {
(
Just(test_word.clone()),
HostMemory::mem_area_strat(test_word.len() as u32),
HostMemory::mem_area_strat(4),
)
})
.prop_map(|(test_word, string_ptr_loc, return_ptr_loc)| Self {
test_word,
string_ptr_loc,
return_ptr_loc,
})
.prop_filter("non-overlapping pointers", |e| {
MemArea::non_overlapping_set(&[e.string_ptr_loc, e.return_ptr_loc])
})
.boxed()
}
pub fn test(&self) {
let mut ctx = WasiCtx::new();
let mut host_memory = HostMemory::new();
let mut memory = host_memory.guest_memory();
// Populate string in guest's memory
let ptr = GuestPtr::<str>::new((self.string_ptr_loc.ptr, self.test_word.len() as u32));
for (slot, byte) in ptr.as_bytes().iter().zip(self.test_word.bytes()) {
memory
.write(slot.expect("should be valid pointer"), byte)
.expect("failed to write");
}
let res = strings::hello_string(
&mut ctx,
&mut memory,
self.string_ptr_loc.ptr as i32,
self.test_word.len() as i32,
self.return_ptr_loc.ptr as i32,
)
.unwrap();
assert_eq!(res, types::Errno::Ok as i32, "hello string errno");
let given = memory
.read(GuestPtr::<u32>::new(self.return_ptr_loc.ptr))
.expect("deref ptr to return value");
assert_eq!(self.test_word.len() as u32, given);
}
}
proptest! {
#[test]
fn hello_string(e in HelloStringExercise::strat()) {
e.test()
}
}
#[derive(Debug)]
struct MultiStringExercise {
a: String,
b: String,
c: String,
sa_ptr_loc: MemArea,
sb_ptr_loc: MemArea,
sc_ptr_loc: MemArea,
return_ptr_loc: MemArea,
}
impl MultiStringExercise {
pub fn strat() -> BoxedStrategy<Self> {
(
unicode_string_strategy(),
unicode_string_strategy(),
unicode_string_strategy(),
HostMemory::mem_area_strat(4),
)
.prop_flat_map(|(a, b, c, return_ptr_loc)| {
(
Just(a.clone()),
Just(b.clone()),
Just(c.clone()),
HostMemory::byte_slice_strat(
a.len() as u32,
1,
&MemAreas::from([return_ptr_loc]),
),
Just(return_ptr_loc),
)
})
.prop_flat_map(|(a, b, c, sa_ptr_loc, return_ptr_loc)| {
(
Just(a.clone()),
Just(b.clone()),
Just(c.clone()),
Just(sa_ptr_loc),
HostMemory::byte_slice_strat(
b.len() as u32,
1,
&MemAreas::from([sa_ptr_loc, return_ptr_loc]),
),
Just(return_ptr_loc),
)
})
.prop_flat_map(|(a, b, c, sa_ptr_loc, sb_ptr_loc, return_ptr_loc)| {
(
Just(a.clone()),
Just(b.clone()),
Just(c.clone()),
Just(sa_ptr_loc),
Just(sb_ptr_loc),
HostMemory::byte_slice_strat(
c.len() as u32,
1,
&MemAreas::from([sa_ptr_loc, sb_ptr_loc, return_ptr_loc]),
),
Just(return_ptr_loc),
)
})
.prop_map(
|(a, b, c, sa_ptr_loc, sb_ptr_loc, sc_ptr_loc, return_ptr_loc)| {
MultiStringExercise {
a,
b,
c,
sa_ptr_loc,
sb_ptr_loc,
sc_ptr_loc,
return_ptr_loc,
}
},
)
.boxed()
}
pub fn test(&self) {
let mut ctx = WasiCtx::new();
let mut host_memory = HostMemory::new();
let mut memory = host_memory.guest_memory();
let mut write_string = |val: &str, loc: MemArea| {
let ptr = GuestPtr::<str>::new((loc.ptr, val.len() as u32));
for (slot, byte) in ptr.as_bytes().iter().zip(val.bytes()) {
memory
.write(slot.expect("should be valid pointer"), byte)
.expect("failed to write");
}
};
write_string(&self.a, self.sa_ptr_loc);
write_string(&self.b, self.sb_ptr_loc);
write_string(&self.c, self.sc_ptr_loc);
let res = strings::multi_string(
&mut ctx,
&mut memory,
self.sa_ptr_loc.ptr as i32,
self.a.len() as i32,
self.sb_ptr_loc.ptr as i32,
self.b.len() as i32,
self.sc_ptr_loc.ptr as i32,
self.c.len() as i32,
self.return_ptr_loc.ptr as i32,
)
.unwrap();
assert_eq!(res, types::Errno::Ok as i32, "multi string errno");
let given = memory
.read(GuestPtr::<u32>::new(self.return_ptr_loc.ptr))
.expect("deref ptr to return value");
assert_eq!((self.a.len() + self.b.len() + self.c.len()) as u32, given);
}
}
proptest! {
#[test]
fn multi_string(e in MultiStringExercise::strat()) {
e.test()
}
}
#[derive(Debug)]
struct OverlappingStringExercise {
a: String,
sa_ptr_loc: MemArea,
offset_b: u32,
offset_c: u32,
return_ptr_loc: MemArea,
}
impl OverlappingStringExercise {
pub fn strat() -> BoxedStrategy<Self> {
// using ascii so we can window into it without worrying about codepoints
(ascii_string_strategy(), HostMemory::mem_area_strat(4))
.prop_flat_map(|(a, return_ptr_loc)| {
(
Just(a.clone()),
HostMemory::mem_area_strat(a.len() as u32),
0..(a.len() as u32),
0..(a.len() as u32),
Just(return_ptr_loc),
)
})
.prop_map(|(a, sa_ptr_loc, offset_b, offset_c, return_ptr_loc)| Self {
a,
sa_ptr_loc,
offset_b,
offset_c,
return_ptr_loc,
})
.prop_filter("non-overlapping pointers", |e| {
MemArea::non_overlapping_set(&[e.sa_ptr_loc, e.return_ptr_loc])
})
.boxed()
}
pub fn test(&self) {
let mut ctx = WasiCtx::new();
let mut host_memory = HostMemory::new();
let mut memory = host_memory.guest_memory();
let mut write_string = |val: &str, loc: MemArea| {
let ptr = GuestPtr::<str>::new((loc.ptr, val.len() as u32));
for (slot, byte) in ptr.as_bytes().iter().zip(val.bytes()) {
memory
.write(slot.expect("should be valid pointer"), byte)
.expect("failed to write");
}
};
write_string(&self.a, self.sa_ptr_loc);
let a_len = self.a.as_bytes().len() as i32;
let res = strings::multi_string(
&mut ctx,
&mut memory,
self.sa_ptr_loc.ptr as i32,
a_len,
(self.sa_ptr_loc.ptr + self.offset_b) as i32,
a_len - self.offset_b as i32,
(self.sa_ptr_loc.ptr + self.offset_c) as i32,
a_len - self.offset_c as i32,
self.return_ptr_loc.ptr as i32,
)
.unwrap();
assert_eq!(res, types::Errno::Ok as i32, "multi string errno");
let given = memory
.read(GuestPtr::<u32>::new(self.return_ptr_loc.ptr))
.expect("deref ptr to return value");
assert_eq!(
((3 * a_len) - (self.offset_b as i32 + self.offset_c as i32)) as u32,
given
);
}
}
proptest! {
#[test]
fn overlapping_string(e in OverlappingStringExercise::strat()) {
e.test()
}
}
|
