在特定时间段内运行 strace

在特定时间段内运行 strace

如何在用户进程上运行 strace 特定时间段(例如 1 分钟),而不终止用户进程且不使用 Ctrl+C?

我想创建一个脚本来自动执行用户进程的 strace。

答案1

使用timeoutin GNU coreutils,您可以执行以下操作:

  • 获取进程id
  • 跑步timeout 60 strace -p PID

这是一个例子。

test.sh:

#!/bin/bash

while :; do
    echo "$$"
    sleep 100
done

运行:

$ ./test.sh
27121

运行:stracetimeout

% cuonglm at ~
% timeout 60 strace -p 27121
Process 27121 attached - interrupt to quit
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 27311
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGCHLD (Child exited) @ 0 (0) ---
wait4(-1, 0x7fff374b8598, WNOHANG, NULL) = -1 ECHILD (No child processes)
rt_sigreturn(0xffffffffffffffff)        = 0
rt_sigaction(SIGINT, {0x45c4d0, [], SA_RESTORER, 0x7fcdc10e05c0}, {0x443910, [], SA_RESTORER, 0x7fcdc10e05c0}, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
write(1, "27121\n", 6)                  = 6
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fcdc1a699d0) = 27328
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGINT, {0x443910, [], SA_RESTORER, 0x7fcdc10e05c0}, {0x45c4d0, [], SA_RESTORER, 0x7fcdc10e05c0}, 8) = 0
wait4(-1,

1分钟后:

....
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fcdc1a699d0) = 27328
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGINT, {0x443910, [], SA_RESTORER, 0x7fcdc10e05c0}, {0x45c4d0, [], SA_RESTORER, 0x7fcdc10e05c0}, 8) = 0
wait4(-1,  <unfinished ...>
Process 27121 detached
% cuonglm at ~

答案2

timeout似乎是最通用的解决方案。只需键入timeout 60s command,命令就会在 60 秒内结束。TERM如果程序默认运行,它将发送一个。您可以使用 选项指定想要获取的信号--signal

持续时间可以以秒、分钟、小时或天为单位设置,每个都有一个特定的后缀来确定将使用什么。

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