library/cpp/terminate_handler/terminate_handler.cpp


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#include <cstdlib> 
#include <exception>

#include <util/stream/output.h>
#include <util/system/backtrace.h>
#include <util/generic/yexception.h>

namespace { 
    // Avoid infinite recursion if std::terminate is triggered anew by the 
    // FancyTerminateHandler. 
    thread_local int TerminateCount = 0; 

    void FancyTerminateHandler() { 
        switch (++TerminateCount) { 
            case 1: 
                break; 
            case 2: 
                Cerr << "FancyTerminateHandler called recursively" << Endl; 
                [[fallthrough]];
            default: 
                abort(); 
                break;
        } 

        if (std::current_exception()) { 
            Cerr << "Uncaught exception: " << CurrentExceptionMessage() << '\n'; 
        } else { 
            Cerr << "Terminate for unknown reason (no current exception)\n"; 
        } 
        PrintBackTrace(); 
        Cerr.Flush(); 
        abort();
    }

    [[maybe_unused]] auto _ = std::set_terminate(&FancyTerminateHandler); 
}