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Tracking Issue for asm_unwind #93334
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A-inline-assemblyArea: Inline assembly (`asm!(…)`)Area: Inline assembly (`asm!(…)`)B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFCF-asm`#![feature(asm)]` (not `llvm_asm`)`#![feature(asm)]` (not `llvm_asm`)
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A-inline-assemblyArea: Inline assembly (`asm!(…)`)Area: Inline assembly (`asm!(…)`)B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFCF-asm`#![feature(asm)]` (not `llvm_asm`)`#![feature(asm)]` (not `llvm_asm`)
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The feature gate for the issue is
#![feature(asm_unwind)].Summary
This feature adds a
may_unwindoption toasm!which allows anasmblock to unwind stack and be part of the stack unwinding process. This option is only supported by the LLVM backend right now.Status
Blocked on the stabilization of
extern "C-unwind"(#74990).Also it is uncertain whether this can be supported directly by non-LLVM backends. It is possible to support by outlining the assembly code to a separate function and calling it.