Method extractExecutable

src/pystack/_pystack/corefile.cpp:173–204

}

std::string
CoreFileExtractor::extractExecutable() const
{
    uintptr_t addr = findExecFn();

    LOG(DEBUG) << std::hex << std::showbase << "Found exec_fn attribute at address: " << std::hex
               << std::showbase << addr;

    if (!addr) {
        throw ElfAnalyzerError("Failed to locate the address of the executable string in the core file");
    }

    auto it = std::find_if(d_maps.cbegin(), d_maps.cend(), [&](auto& map) {
        return map.start <= addr && addr <= map.end;
    });

    if (it == d_maps.cend()) {
        throw ElfAnalyzerError(
                "Failed to locate the map where the executable string resides in the core file");
    }

    unsigned long location = addr - it->start + it->offset;
    std::ifstream is(d_analyzer->d_filename, std::ifstream::binary);
    if (!is) {
        throw ElfAnalyzerError("Failed to open the core file for analysis");
    }
    is.seekg(location);
    std::string executable_string;
    std::getline(is, executable_string, '\0');
    LOG(DEBUG) << "Executable string (exec_fn) extracted from core file: " << executable_string;
    return executable_string;
}

static auto
read_obj(const char** source, void* dest, size_t size)