xref: /freebsd/cddl/usr.sbin/dwatch/libexec/proc (revision 0e33efe4e4b5d24e2d416938af8bc6e6e4160ec8) 
1# -*- tab-width: 4 -*- ;; Emacs
2# vi: set filetype=sh tabstop=8 shiftwidth=8 noexpandtab :: Vi/ViM
3############################################################ IDENT(1)
4#
5# $Title: dwatch(8) module for dtrace_proc(4) activity $
6# $Copyright: 2014-2018 Devin Teske. All rights reserved. $
7# $FreeBSD$
8#
9############################################################ DESCRIPTION
10#
11# Display process activity
12#
13############################################################ PROBE
14
15case "$PROFILE" in
16proc)
17	: ${PROBE:=$( echo \
18		proc:::create, \
19		proc:::exec, \
20		proc:::exec-failure, \
21		proc:::exec-success, \
22		proc:::exit, \
23		proc:::signal-clear, \
24		proc:::signal-discard, \
25		proc:::signal-send )}
26	;;
27proc-signal)
28	: ${PROBE:=$( echo \
29		proc:::signal-clear, \
30		proc:::signal-discard, \
31		proc:::signal-send )}
32	;;
33proc-status)
34	: ${PROBE:=$( echo \
35		proc:::create, \
36		proc:::exec, \
37		proc:::exec-failure, \
38		proc:::exec-success, \
39		proc:::exit )}
40	;;
41*)
42	: ${PROBE:=proc:::${PROFILE#proc-}}
43esac
44
45############################################################ ACTIONS
46
47exec 9<<EOF
48this int	sig;
49this pid_t	pid;
50this string	details;
51this string	exec_arg0;
52
53inline string probealias[string name] =
54	name == "create" ?		"FORK" :
55	name == "exec" ?		"EXEC" :
56	name == "exec-failure" ?	"FAIL" :
57	name == "exec-success" ?	"INIT" :
58	name == "exit" ?		"EXIT" :
59	name == "signal-clear" ?	"CLEAR" :
60	name == "signal-discard" ?	"DISCARD" :
61	name == "signal-send" ?		"SEND" :
62	name;
63
64$PROBE /* probe ID $ID */
65{${TRACE:+
66	printf("<$ID>");}
67	this->details = "";
68}
69
70proc:::create /* probe ID $(( $ID + 1 )) */
71{${TRACE:+
72	printf("<$(( $ID + 1 ))>");
73}
74	$( pproc -P _create "(struct proc *)args[0]" )
75
76	/* details = "pid <pid of args[0]> -- <proc args of args[0]>" */
77	this->details = strjoin(
78		strjoin("pid ", lltostr(this->pid_create)),
79		strjoin(" -- ", this->args_create));
80}
81
82proc:::exec /* probe ID $(( $ID + 2 )) */
83{${TRACE:+
84	printf("<$(( $ID + 2 ))");}
85	this->details = this->exec_arg0 = stringof(arg0);
86}
87
88proc:::exec-failure /* probe ID $(( $ID + 3 )) */
89{${TRACE:+
90	printf("<$(( $ID + 3 ))>");
91}
92	/* details = "<arg0 from proc:::exec>: <strerror of arg0> (<arg0>)" */
93	this->details = strjoin(
94		strjoin(this->exec_arg0, ": "),
95		strjoin(strerror[(int)arg0],
96			strjoin(" (", strjoin(lltostr((int)arg0), ")"))));
97}
98
99proc:::exec-success /* probe ID $(( $ID + 4 )) */
100{${TRACE:+
101	printf("<$(( $ID + 4 ))>");}
102	this->details = this->args0;
103}
104
105proc:::exit /* probe ID $(( $ID + 5 )) */
106{${TRACE:+
107	printf("<$(( $ID + 5 ))>");}
108	this->details = child_signal_string[(int)arg0];
109}
110
111proc:::signal-clear /* probe ID $(( $ID + 6 )) */
112{${TRACE:+
113	printf("<$(( $ID + 6 ))>");}
114	this->pid = (pid_t)((ksiginfo_t *)args[1])->ksi_info.si_pid;
115	this->sig = (int)arg0;
116}
117
118proc:::signal-discard, proc:::signal-send /* probe ID $(( $ID + 7 )) */
119{${TRACE:+
120	printf("<$(( $ID + 7 ))>");}
121	this->pid = (pid_t)((struct proc *)args[1])->p_pid;
122	this->sig = (int)arg2;
123}
124
125proc:::signal-clear,
126proc:::signal-discard,
127proc:::signal-send /* probe ID $(( $ID + 8 )) */
128{${TRACE:+
129	printf("<$(( $ID + 8 ))>");
130}
131	/* details = "<signal>[<num>] pid <pid>" */
132	this->details = strjoin(strjoin(signal_string[this->sig], "["),
133		strjoin(strjoin(lltostr(this->sig), "] pid "),
134		lltostr(this->pid)));
135}
136
137proc:::signal-send, proc:::signal-discard /* probe ID $(( $ID + 9 )) */
138{${TRACE:+
139	printf("<$(( $ID + 9 ))>");
140}
141	$( pproc -P _signal "(struct proc *)args[1]" )
142
143	this->details = strjoin(this->details,
144		strjoin(" -- ", this->args_signal));
145}
146EOF
147ACTIONS=$( cat <&9 )
148ID=$(( $ID + 10 ))
149
150############################################################ EVENT DETAILS
151
152exec 9<<EOF
153	/*
154	 * Print details
155	 */
156	printf("%s %s", probealias[probename], this->details);
157EOF
158EVENT_DETAILS=$( cat <&9 )
159
160################################################################################
161# END
162################################################################################
163