linux的strace命令(详解)(国外英文资料).docVIP

linux的strace命令(详解)(国外英文资料) Linuxs strace command (detail) This article describes in detail the use of strace commands under linux. The strace command is a powerful tool that shows all system calls that are emitted by a user space program. Strace displays the parameters of these calls and returns values in symbolic form. Strace receives information from the kernel and does not need to build the kernel in any particular way. Here are a few common option records The 1 -f -F option tells strace to track both the fork and VFORK processes 2, -o, xxx.txt output to a file. 3 -e execve records only such system calls as execve - - - - - - - - - -- The process cant be started, the softwares running speed slows down, the programs SegmentFault and so on are all headaches for users of each Unix system, In this paper three examples demonstrate how to use the truss, strace and ltrace of the three commonly used debugging tools to diagnose software quickly Difficult miscellaneous diseases. Truss and strace are used to track the system calls or signal generation of a process, while ltrace is used to track the process calls library functions. Truss was an early debugger for System V R4, and most Unix systems, including Aix and FreeBSD, came with this tool; And strace was originally written for the SunOS system, and ltrace first appeared in GNU/DebianLinux. These two tools have now been ported to most Unix systems, and most Linux distributions come with strace and ltrace, and FreeBSD can also be installed through Ports. Not only can you debug a new start program from the command line, you can also bind truss, strace, or ltrace to an existing PID to debug a running program. The basic use of the three debugging tools is roughly the same. Here are only three of them, and they are the three most commonly used command line arguments: -f: in addition to tracking the current process, it also tracks its child processes. -o file: write the output information to the file file instead of the stand