backtrace.cpp

#include <cstdio>
#include <cxxabi.h>
#include <dlfcn.h>
#include <unwind.h>

void backtrace() {
    int count = 0;

    _Unwind_Trace_Fn cb = [] (_Unwind_Context *context, void *args) -> _Unwind_Reason_Code {
        int *count = static_cast<int *>(args);
        void *addr = reinterpret_cast<void *>(_Unwind_GetIP(context));

        const char *symbol = nullptr;

        Dl_info info;
        if (dladdr(addr, &info) && info.dli_sname) {
            symbol = info.dli_sname;
        }

        int status = 0;
        char *symbol_d = __cxxabiv1::__cxa_demangle(symbol, nullptr, nullptr, &status);

        printf("%03d: %p %s\n", (*count)++, addr, (symbol_d && status == 0) ? symbol_d : symbol);

        delete symbol_d;
        return _URC_NO_REASON;
    };

    _Unwind_Backtrace(cb, &count);
}