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signoop: Support real-time signals #21

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20 changes: 11 additions & 9 deletions sigsnoop/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,17 +5,19 @@ This is done by instrumenting signal/signal_generate tracepoints.

## Output

```
$ sudo ./sigsnoop.bt
Attaching 9 probes...
Tracing signals, hit ctrl-c to end.
TIME PID COMM TPID SIG
09:42:33 214863 locate 214860 SIGCHLD
09:42:33 214866 locate 214860 SIGCHLD
09:42:33 214862 rpm 214861 SIGCHLD
09:42:33 214868 rpm 214861 SIGCHLD
09:42:33 214869 rpm 214861 SIGCHLD
09:42:33 214870 uname 214861 SIGCHLD
09:42:34 214879 rpm 214874 SIGCHLD
08:25:28 195973 vte-urlencode-c 194760 SIGCHLD
08:25:29 195974 ls 194760 SIGCHLD
08:25:29 195975 vte-urlencode-c 194760 SIGCHLD
08:25:29 1847 Xorg 1847 SIGALRM
08:25:31 0 swapper/3 2594 SIGNAL-34
08:25:31 1847 Xorg 1847 SIGALRM
^CBye.
```

The first line shows that pid 214863 (locate thread) delivered a SIGCHLD
signal to pid 214860 (TPID = the target pid).
The first line shows that pid 195973 (locate thread) delivered a SIGCHLD
signal to pid 194760 (TPID = the target pid).
33 changes: 33 additions & 0 deletions sigsnoop/sigsnoop.bt
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Expand Up @@ -47,6 +47,39 @@ BEGIN
@SIG_STR[29] = "SIGIO";
@SIG_STR[30] = "SIGPWR";
@SIG_STR[31] = "SIGSYS";
@SIG_STR[32] = "SIGNAL-32"; /* SIGRTMIN in kernel */
@SIG_STR[33] = "SIGNAL-33";
@SIG_STR[34] = "SIGNAL-34";
@SIG_STR[35] = "SIGNAL-35";
@SIG_STR[36] = "SIGNAL-36";
@SIG_STR[37] = "SIGNAL-37";
@SIG_STR[38] = "SIGNAL-38";
@SIG_STR[39] = "SIGNAL-39";
@SIG_STR[40] = "SIGNAL-40";
@SIG_STR[41] = "SIGNAL-41";
@SIG_STR[42] = "SIGNAL-42";
@SIG_STR[43] = "SIGNAL-43";
@SIG_STR[44] = "SIGNAL-44";
@SIG_STR[45] = "SIGNAL-45";
@SIG_STR[46] = "SIGNAL-46";
@SIG_STR[47] = "SIGNAL-47";
@SIG_STR[48] = "SIGNAL-48";
@SIG_STR[49] = "SIGNAL-49";
@SIG_STR[50] = "SIGNAL-50";
@SIG_STR[51] = "SIGNAL-51";
@SIG_STR[52] = "SIGNAL-52";
@SIG_STR[53] = "SIGNAL-53";
@SIG_STR[54] = "SIGNAL-54";
@SIG_STR[55] = "SIGNAL-55";
@SIG_STR[56] = "SIGNAL-56";
@SIG_STR[57] = "SIGNAL-57";
@SIG_STR[58] = "SIGNAL-58";
@SIG_STR[59] = "SIGNAL-59";
@SIG_STR[60] = "SIGNAL-60";
@SIG_STR[61] = "SIGNAL-61";
@SIG_STR[62] = "SIGNAL-62";
@SIG_STR[63] = "SIGNAL-63";
@SIG_STR[64] = "SIGNAL-64"; /* SIGRTMAX */

printf("Tracing signals, hit ctrl-c to end.\n");
printf("%-8s %-8s %-16s %-8s %-8s\n",
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