bjoernager/rust
bjoernager/rust
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Use signal handler only on supported platforms

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This commit is contained in:
Tyler Mandry 2021-07-02 00:20:04 +00:00
parent ec6a85a536
commit 162ed4d7da
1 changed files with 43 additions and 38 deletions
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81
compiler/rustc_driver/src/lib.rs
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@ -1312,55 +1312,60 @@ pub fn init_env_logger(env: &str) {
tracing::subscriber::set_global_default(subscriber).unwrap(); tracing::subscriber::set_global_default(subscriber).unwrap();
} }
#[cfg(unix)] #[cfg(all(unix, any(target_env = "gnu", target_os = "macos")))]
extern "C" { mod signal_handler {
fn backtrace_symbols_fd(buffer: *const *mut libc::c_void, size: libc::c_int, fd: libc::c_int); extern "C" {
} fn backtrace_symbols_fd(
buffer: *const *mut libc::c_void,
size: libc::c_int,
fd: libc::c_int,
);
}
#[cfg(unix)] extern "C" fn print_stack_trace(_: libc::c_int) {
extern "C" fn print_stack_trace(_: libc::c_int) { const MAX_FRAMES: usize = 256;
const MAX_FRAMES: usize = 256; static mut STACK_TRACE: [*mut libc::c_void; MAX_FRAMES] =
static mut STACK_TRACE: [*mut libc::c_void; MAX_FRAMES] = [std::ptr::null_mut(); MAX_FRAMES]; [std::ptr::null_mut(); MAX_FRAMES];
unsafe { unsafe {
let depth = libc::backtrace(STACK_TRACE.as_mut_ptr(), MAX_FRAMES as i32); let depth = libc::backtrace(STACK_TRACE.as_mut_ptr(), MAX_FRAMES as i32);
if depth == 0 { if depth == 0 {
return; return;
}
backtrace_symbols_fd(STACK_TRACE.as_ptr(), depth, 2);
}
}
// When an error signal (such as SIGABRT or SIGSEGV) is delivered to the
// process, print a stack trace and then exit.
pub(super) fn install() {
unsafe {
const ALT_STACK_SIZE: usize = libc::MINSIGSTKSZ + 64 * 1024;
let mut alt_stack: libc::stack_t = std::mem::zeroed();
alt_stack.ss_sp =
std::alloc::alloc(std::alloc::Layout::from_size_align(ALT_STACK_SIZE, 1).unwrap())
as *mut libc::c_void;
alt_stack.ss_size = ALT_STACK_SIZE;
libc::sigaltstack(&mut alt_stack, std::ptr::null_mut());
let mut sa: libc::sigaction = std::mem::zeroed();
sa.sa_sigaction = print_stack_trace as libc::sighandler_t;
sa.sa_flags = libc::SA_NODEFER | libc::SA_RESETHAND | libc::SA_ONSTACK;
libc::sigemptyset(&mut sa.sa_mask);
libc::sigaction(libc::SIGSEGV, &sa, std::ptr::null_mut());
} }
backtrace_symbols_fd(STACK_TRACE.as_ptr(), depth, 2);
} }
} }
#[cfg(unix)] #[cfg(not(all(unix, any(target_env = "gnu", target_os = "macos"))))]
// When an error signal (such as SIGABRT or SIGSEGV) is delivered to the mod signal_handler {
// process, print a stack trace and then exit. pub(super) fn install() {}
fn install_signal_handler() {
unsafe {
const ALT_STACK_SIZE: usize = libc::MINSIGSTKSZ + 64 * 1024;
let mut alt_stack: libc::stack_t = std::mem::zeroed();
alt_stack.ss_sp =
std::alloc::alloc(std::alloc::Layout::from_size_align(ALT_STACK_SIZE, 1).unwrap())
as *mut libc::c_void;
alt_stack.ss_size = ALT_STACK_SIZE;
libc::sigaltstack(&mut alt_stack, std::ptr::null_mut());
let mut sa: libc::sigaction = std::mem::zeroed();
sa.sa_sigaction = print_stack_trace as libc::sighandler_t;
sa.sa_flags = libc::SA_NODEFER | libc::SA_RESETHAND | libc::SA_ONSTACK;
libc::sigemptyset(&mut sa.sa_mask);
libc::sigaction(libc::SIGSEGV, &sa, std::ptr::null_mut());
}
} }
#[cfg(not(unix))]
// When an error signal (such as SIGABRT or SIGSEGV) is delivered to the
// process, print a stack trace and then exit.
fn install_signal_handler() {}
pub fn main() -> ! { pub fn main() -> ! {
let start_time = Instant::now(); let start_time = Instant::now();
let start_rss = get_resident_set_size(); let start_rss = get_resident_set_size();
init_rustc_env_logger(); init_rustc_env_logger();
install_signal_handler(); signal_handler::install();
let mut callbacks = TimePassesCallbacks::default(); let mut callbacks = TimePassesCallbacks::default();
install_ice_hook(); install_ice_hook();
let exit_code = catch_with_exit_code(|| { let exit_code = catch_with_exit_code(|| {