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fix tree borrows Unique test

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This commit is contained in:
Ralf Jung 2024-08-12 10:23:39 +02:00
parent 7383401e08
commit 14f9284ebe
2 changed files with 7 additions and 11 deletions
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10
src/tools/miri/tests/pass/tree_borrows/vec_unique.rs
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@ -1,5 +1,3 @@
// FIXME: This test is broken since https://github.com/rust-lang/rust/pull/126793,
// possibly related to the additional struct between Vec and Unique.
//@revisions: default uniq
// We disable the GC for this test because it would change what is printed.
//@compile-flags: -Zmiri-tree-borrows -Zmiri-provenance-gc=0
@ -32,20 +30,20 @@ fn main() {
// whether we got the distance correct:
// If the output shows
//
// |- <XYZ: uniq>
// '- <XYZ: uniq>
// ├─ <TAG=base.as_ptr()>
// └─ <TAG=base.as_ptr()>
//
// then `nth_parent` is not big enough.
// The correct value for `nth_parent` should be the minimum
// integer for which the output shows
//
// '- <XYZ: uniq, uniq>
// └─ <TAG=base.as_ptr(), base.as_ptr(), ...>
// )
//
// Ultimately we want pointers obtained through independent
// calls of `as_ptr` to be able to alias, which will probably involve
// a new permission that allows aliasing when there is no protector.
let nth_parent = if cfg!(uniq) { 2 } else { 0 };
let nth_parent = if cfg!(uniq) { 9 } else { 0 };
name!(base.as_ptr()=>nth_parent);
name!(base.as_ptr()=>nth_parent);

8
src/tools/miri/tests/pass/tree_borrows/vec_unique.uniq.stderr
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@ -2,9 +2,7 @@
Warning: this tree is indicative only. Some tags may have been hidden.
0.. 2
| Act | └─┬──<TAG=root of the allocation>
|-----| ├────<TAG=base.as_ptr()>
|-----| ├────<TAG=base.as_ptr()>
|-----| └─┬──<TAG=raw_parts.0>
|-----| ├────<TAG=reconstructed.as_ptr()>
|-----| └────<TAG=reconstructed.as_ptr()>
|-----| └─┬──<TAG=base.as_ptr(), base.as_ptr()>
|-----| └─┬──<TAG=raw_parts.0>
|-----| └────<TAG=reconstructed.as_ptr(), reconstructed.as_ptr()>
──────────────────────────────────────────────────