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//! This module contains the implementation of the `eh_personality` lang item.
//!
//! The actual implementation is heavily dependent on the target since Rust
//! tries to use the native stack unwinding mechanism whenever possible.
//!
//! This personality function is still required with `-C panic=abort` because
//! it is used to catch foreign exceptions from `extern "C-unwind"` and turn
//! them into aborts.
//!
//! Additionally, ARM EHABI uses the personality function when generating
//! backtraces.
mod dwarf;
#[cfg(not(test))]
cfg_if::cfg_if! {
if #[cfg(target_os = "emscripten")] {
mod emcc;
} else if #[cfg(target_env = "msvc")] {
// This is required by the compiler to exist (e.g., it's a lang item),
// but it's never actually called by the compiler because
// _CxxFrameHandler3 is the personality function that is always used.
// Hence this is just an aborting stub.
#[lang = "eh_personality"]
fn rust_eh_personality() {
core::intrinsics::abort()
}
} else if #[cfg(any(
all(target_family = "windows", target_env = "gnu"),
target_os = "psp",
target_os = "solid_asp3",
all(target_family = "unix", not(target_os = "espidf")),
all(target_vendor = "fortanix", target_env = "sgx"),
))] {
mod gcc;
} else {
// Targets that don't support unwinding.
// - family=wasm
// - os=none ("bare metal" targets)
// - os=uefi
// - os=espidf
// - os=hermit
// - nvptx64-nvidia-cuda
// - arch=avr
}
}
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