bjoernager/rust
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Remove allowing static_mut_refs lint

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This commit is contained in:
mu001999 2024-10-14 16:48:27 +08:00
parent 883f9a2c8f
commit 1e10e503fe
2 changed files with 11 additions and 11 deletions
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20
compiler/rustc_driver_impl/src/signal_handler.rs
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@ -2,7 +2,7 @@
//! Primarily used to extract a backtrace from stack overflow
use std::alloc::{Layout, alloc};
use std::{fmt, mem, ptr};
use std::{fmt, mem, ptr, slice};
use rustc_interface::util::{DEFAULT_STACK_SIZE, STACK_SIZE};
@ -35,20 +35,22 @@ macro raw_errln($tokens:tt) {
}
/// Signal handler installed for SIGSEGV
// FIXME(static_mut_refs): Do not allow `static_mut_refs` lint
#[allow(static_mut_refs)]
extern "C" fn print_stack_trace(_: libc::c_int) {
///
/// # Safety
///
/// Caller must ensure that this function is not re-entered.
unsafe extern "C" fn print_stack_trace(_: libc::c_int) {
const MAX_FRAMES: usize = 256;
// Reserve data segment so we don't have to malloc in a signal handler, which might fail
// in incredibly undesirable and unexpected ways due to e.g. the allocator deadlocking
static mut STACK_TRACE: [*mut libc::c_void; MAX_FRAMES] = [ptr::null_mut(); MAX_FRAMES];
let stack = unsafe {
// Reserve data segment so we don't have to malloc in a signal handler, which might fail
// in incredibly undesirable and unexpected ways due to e.g. the allocator deadlocking
static mut STACK_TRACE: [*mut libc::c_void; MAX_FRAMES] = [ptr::null_mut(); MAX_FRAMES];
// Collect return addresses
let depth = libc::backtrace(STACK_TRACE.as_mut_ptr(), MAX_FRAMES as i32);
let depth = libc::backtrace(&raw mut STACK_TRACE as _, MAX_FRAMES as i32);
if depth == 0 {
return;
}
&STACK_TRACE.as_slice()[0..(depth as _)]
slice::from_raw_parts(&raw const STACK_TRACE as _, depth as _)
};
// Just a stack trace is cryptic. Explain what we're doing.