Current File : //usr/share/systemtap/examples/lwtools/killsnoop-nd.stp
#!/usr/bin/stap
/*
* killsnoop-nd.stp Trace process signals.
* For Linux, uses SystemTap (non-debuginfo).
*
* Copyright (C) 2015 Brendan Gregg.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 24-Jun-2014 Brendan Gregg Created this.
*/
global target;
global signal;
probe begin
{
printf("%-6s %-12s %-5s %-6s %6s\n", "FROM", "COMMAND", "SIG", "TO",
"RESULT");
}
probe nd_syscall.kill
{
/*
* I could use the @entry shortcut on the return probe instead, but
* wanted a full example of using global arrays directly.
*/
target[tid()] = uint_arg(1);
signal[tid()] = uint_arg(2);
}
probe nd_syscall.kill.return
{
if (target[tid()] != 0) {
printf("%-6d %-12s %-5d %-6d %6d\n", pid(), execname(),
signal[tid()], target[tid()], int_arg(1));
delete target[tid()];
delete signal[tid()];
}
}
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