Arbutils/src/Exception.hpp

#ifndef ARBUTILS_EXCEPTION_HPP
#define ARBUTILS_EXCEPTION_HPP

#include <exception>
#include <sstream>
#include <string>
#include <utility>
#if !WINDOWS
#define BACKWARD_HAS_BFD 1
#include "../extern/backward.hpp"
#endif

namespace ArbUt {
    class Exception : std::exception {
        std::string _msg;
#if !WINDOWS
        backward::StackTrace _stack;
#endif

    public:
        explicit Exception(std::string msg) : _msg(std::move(msg)) {
#if !WINDOWS
            _stack.load_here(9);
#endif
        }

        [[nodiscard]] const char* what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW override { return _msg.c_str(); }

        [[nodiscard]] std::string GetStacktrace([[maybe_unused]] size_t depth = 6,
                                                [[maybe_unused]] bool include_addr = true) const {
#if !WINDOWS
            backward::TraceResolver tr;
            tr.load_stacktrace(_stack);
            std::stringstream ss;
            for (size_t i = 3; i < _stack.size() && i < depth + 3; ++i) {
                backward::ResolvedTrace trace = tr.resolve(_stack[i]);
                if (trace.source.filename.empty()) {
                    auto objectName =
                        (strrchr(trace.object_filename.c_str(), '/') ? strrchr(trace.object_filename.c_str(), '/') + 1
                                                                     : trace.object_filename.c_str());
                    auto function = trace.object_function;
                    if (function.length() > 70) {
                        function = function.substr(0, 67);
                        function += "...";
                    }
                    ss << objectName;
                    if (include_addr) {
                        ss << "[" << trace.addr << "]";
                    }
                    ss << " " << function << std::endl;

                } else {
                    auto fileName =
                        (strrchr(trace.source.filename.c_str(), '/') ? strrchr(trace.source.filename.c_str(), '/') + 1
                                                                     : trace.source.filename.c_str());
                    auto function = trace.object_function;
                    if (function.length() > 70) {
                        function = function.substr(0, 67);
                        function += "...";
                    }
                    ss << fileName << "[" << trace.source.line << "] " << function << std::endl;
                }
            }
            return ss.str();
#else
            return "Stack trace not available on Windows.";
#endif
        }
    };
}

#endif // ARBUTILS_EXCEPTION_HPP