9ce0820eef
std: Fix a bug on the wasm32-wasi target opening files This commit fixes an issue pointed out in #82758 where LTO changed the behavior of a program. It turns out that LTO was not at fault here, it simply uncovered an existing bug. The bindings to `__wasilibc_find_relpath` assumed that the relative portion of the path returned was always contained within thee input `buf` we passed in. This isn't actually the case, however, and sometimes the relative portion of the path may reference a sub-portion of the input string itself. The fix here is to use the relative path pointer coming out of `__wasilibc_find_relpath` as the source of truth. The `buf` used for local storage is discarded in this function and the relative path is copied out unconditionally. We might be able to get away with some `Cow`-like business or such to avoid the extra allocation, but for now this is probably the easiest patch to fix the original issue. |
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| build.rs | ||
| Cargo.toml | ||