linux 进程运行状态跟踪

 问题: 打算跟踪linux下的进程运行状态

当前推荐方式
安装gdb后
- pstack

示例：查看bash程序进程栈:

/opt/app/tdev1$ps -fe| grep bash
tdev1   7013  7012  0 19:42 pts/1    00:00:00 -bash
tdev1  11402 11401  0 20:31 pts/2    00:00:00 -bash
tdev1  11474 11402  0 20:32 pts/2    00:00:00 grep bash
/opt/app/tdev1$pstack 7013
#0  0x00000039958c5620 in __read_nocancel () from /lib64/libc.so.6
#1  0x000000000047dafe in rl_getc ()
#2  0x000000000047def6 in rl_read_key ()
#3  0x000000000046d0f5 in readline_internal_char ()
#4  0x000000000046d4e5 in readline ()
#5  0x00000000004213cf in ?? ()
#6  0x000000000041d685 in ?? ()
#7  0x000000000041e89e in ?? ()
#8  0x00000000004218dc in yyparse ()
#9  0x000000000041b507 in parse_command ()
#10 0x000000000041b5c6 in read_command ()
#11 0x000000000041b74e in reader_loop ()
#12 0x000000000041b2aa in main ()

参考:http://linuxtools-rst.readthedocs.io/zh_CN/latest/tool/pstack.html#

- strace

每一行都是一条系统调用，等号左边是系统调用的函数名及其参数，右边是该调用的返回值。 strace 显示这些调用的参数并返回符号形式的值。strace 从内核接收信息，而且不需要以任何特殊的方式来构建内核。

$strace cat /dev/null
execve("/bin/cat", ["cat", "/dev/null"], [/* 22 vars */]) = 0
brk(0)                                  = 0xab1000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f29379a7000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
...