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#![cfg_attr(test, allow(dead_code))]
use crate::sys::c;
use crate::thread;
pub struct Handler;
impl Handler {
pub unsafe fn new() -> Handler {
// This API isn't available on XP, so don't panic in that case and just
// pray it works out ok.
if c::SetThreadStackGuarantee(&mut 0x5000) == 0
&& c::GetLastError() as u32 != c::ERROR_CALL_NOT_IMPLEMENTED as u32
{
panic!("failed to reserve stack space for exception handling");
}
Handler
}
}
extern "system" fn vectored_handler(ExceptionInfo: *mut c::EXCEPTION_POINTERS) -> c::LONG {
unsafe {
let rec = &(*(*ExceptionInfo).ExceptionRecord);
let code = rec.ExceptionCode;
if code == c::EXCEPTION_STACK_OVERFLOW {
rtprintpanic!(
"\nthread '{}' has overflowed its stack\n",
thread::current().name().unwrap_or("<unknown>")
);
}
c::EXCEPTION_CONTINUE_SEARCH
}
}
pub unsafe fn init() {
if c::AddVectoredExceptionHandler(0, vectored_handler).is_null() {
panic!("failed to install exception handler");
}
// Set the thread stack guarantee for the main thread.
let _h = Handler::new();
}
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