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kmc-solid: std::sys code maintenance #105120

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Merged
merged 4 commits into from
Dec 9, 2022
Merged

kmc-solid: std::sys code maintenance #105120

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427a079
kmc-solid: Use `expose_addr` and `from_exposed_addr` for pointer-inte…
kawadakk Dec 1, 2022
47f2f6d
kmc-solid: Add a stub implementation of `is_terminal`
kawadakk Dec 1, 2022
f482e55
kmc-solid: Address compiler warnings
kawadakk Dec 1, 2022
ae7633f
kmc-solid: Don't do `Box::from_raw(&*(x: Box<T>) as *const T as *mut T)`
kawadakk Dec 1, 2022
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kmc-solid: Use expose_addr and from_exposed_addr for pointer-inte… 
…ger casts

Pointer-integer casts are required for conversion between `EXINF` (ITRON
task entry point parameter) and `*const ThreadInner`. Addresses the
deny-level lint `fuzzy_provenance_casts`.
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@kawadakk
kawadakk committed Dec 1, 2022
commit 427a079d318e68686cc7512838a23ed71315d8de
4 changes: 2 additions & 2 deletions library/std/src/sys/itron/thread.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -91,7 +91,7 @@ impl Thread {

unsafe extern "C" fn trampoline(exinf: isize) {
// Safety: `ThreadInner` is alive at this point
let inner = unsafe { &*(exinf as *const ThreadInner) };
let inner: &ThreadInner = unsafe { &*crate::ptr::from_exposed_addr(exinf as usize) };

// Safety: Since `trampoline` is called only once for each
// `ThreadInner` and only `trampoline` touches `start`,
Expand Down Expand Up @@ -168,7 +168,7 @@ impl Thread {
abi::acre_tsk(&abi::T_CTSK {
// Activate this task immediately
tskatr: abi::TA_ACT,
exinf: inner_ptr as abi::EXINF,
exinf: inner_ptr.expose_addr() as abi::EXINF,
// The entry point
task: Some(trampoline),
// Inherit the calling task's base priority
Expand Down