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Only print a backtrace the first time the signal handler is called.

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This avoids infinite recursion if the printing causes another signal.
This commit is contained in:
Simon Sapin 2019-11-27 20:35:41 +01:00
parent 413f499da8
commit 99804eb5a6
1 changed files with 9 additions and 6 deletions
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15
ports/glutin/main2.rs
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@ -31,7 +31,6 @@ use servo::servo_config::pref;
use std::env; use std::env;
use std::panic; use std::panic;
use std::process; use std::process;
use std::sync::atomic;
use std::thread; use std::thread;
pub mod platform { pub mod platform {
@ -55,12 +54,16 @@ fn install_crash_handler() {
use std::thread; use std::thread;
extern "C" fn handler(sig: i32) { extern "C" fn handler(sig: i32) {
print!("Stack trace"); use std::sync::atomic;
if let Some(name) = thread::current().name() { static BEEN_HERE_BEFORE: atomic::AtomicBool = atomic::AtomicBool::new(false);
print!(" for thread \"{}\"", name); if !BEEN_HERE_BEFORE.swap(true, atomic::Ordering::SeqCst) {
print!("Stack trace");
if let Some(name) = thread::current().name() {
print!(" for thread \"{}\"", name);
}
println!();
backtrace::print();
} }
println!();
backtrace::print();
unsafe { unsafe {
_exit(sig); _exit(sig);
} }