    # File lib/phusion_passenger/utils.rb, line 775
            def global_backtrace_report
                    if Kernel.respond_to?(:caller_for_all_threads)
                            output = "========== Process #{Process.pid}: backtrace dump ==========\n"
                            caller_for_all_threads.each_pair do |thread, stack|
                                    output << ("-" * 60) << "\n"
                                    output << "# Thread: #{thread.inspect}, "
                                    if thread == Thread.main
                                            output << "[main thread], "
                                    end
                                    if thread == Thread.current
                                            output << "[current thread], "
                                    end
                                    output << "alive = #{thread.alive?}\n"
                                    output << ("-" * 60) << "\n"
                                    output << "    " << stack.join("\n    ")
                                    output << "\n\n"
                            end
                    else
                            output = "========== Process #{Process.pid}: backtrace dump ==========\n"
                            output << ("-" * 60) << "\n"
                            output << "# Current thread: #{Thread.current.inspect}\n"
                            output << ("-" * 60) << "\n"
                            output << "    " << caller.join("\n    ")
                    end
                    return output
            end