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make sure panic_nounwind_fmt can still be fully inlined (e.g. for panic_immediate_abort)

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This commit is contained in:
Ralf Jung 2023-11-27 11:07:57 +01:00
parent a19161043a
commit 2a48a7750a
1 changed files with 4 additions and 1 deletions
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5
library/core/src/panicking.rs
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@ -84,6 +84,7 @@ pub const fn panic_fmt(fmt: fmt::Arguments<'_>) -> ! {
#[rustc_nounwind]
#[rustc_const_unstable(feature = "core_panic", issue = "none")]
pub const fn panic_nounwind_fmt(fmt: fmt::Arguments<'_>, force_no_backtrace: bool) -> ! {
#[inline] // this should always be inlined into `panic_nounwind_fmt`
#[track_caller]
fn runtime(fmt: fmt::Arguments<'_>, force_no_backtrace: bool) -> ! {
if cfg!(feature = "panic_immediate_abort") {
@ -112,6 +113,7 @@ pub const fn panic_nounwind_fmt(fmt: fmt::Arguments<'_>, force_no_backtrace: boo
#[inline]
#[track_caller]
const fn comptime(fmt: fmt::Arguments<'_>, _force_no_backtrace: bool) -> ! {
// We don't unwind anyway at compile-time so we can call the regular `panic_fmt`.
panic_fmt(fmt);
}
@ -142,7 +144,8 @@ pub const fn panic(expr: &'static str) -> ! {
panic_fmt(fmt::Arguments::new_const(&[expr]));
}
/// Like `panic`, but without unwinding and track_caller to reduce the impact on codesize.
/// Like `panic`, but without unwinding and track_caller to reduce the impact on codesize on the caller.
/// If you want `#[track_caller]` for nicer errors, call `panic_nounwind_fmt` directly.
#[cfg_attr(not(feature = "panic_immediate_abort"), inline(never), cold)]
#[cfg_attr(feature = "panic_immediate_abort", inline)]
#[lang = "panic_nounwind"] // needed by codegen for non-unwinding panics