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Kernel: Send SIGSEGV on seg-fault

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Now programs can catch the SIGSEGV signal when they segfault.

This commit also introduced the send_urgent_signal_to_self method,
which is needed to send signals to a thread when handling exceptions
caused by the same thread.
This commit is contained in:
Drew Stratford 2019-10-07 22:22:50 +13:00 • committed by Andreas Kling
commit c136fd3fe2
Notes: sideshowbarker 2024-07-19 11:45:46 +09:00
3 changed files with 31 additions and 0 deletions
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5
Kernel/Arch/i386/CPU.cpp
View file

@ -262,6 +262,11 @@ void exception_14_handler(RegisterDump& regs)
auto response = MM.handle_page_fault(PageFault(regs.exception_code, VirtualAddress(fault_address)));
if (response == PageFaultResponse::ShouldCrash) {
if(current->has_signal_handler(SIGSEGV)){
current->send_urgent_signal_to_self(SIGSEGV);
return;
}
kprintf("\033[31;1m%s(%u:%u) Unrecoverable page fault, %s address %p\033[0m\n",
current->process().name().characters(),
current->pid(),