| #![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(); |
| } |