xref: /freebsd/cddl/usr.sbin/dwatch/libexec/proc (revision d0b2dbfa0ecf2bbc9709efc5e20baf8e4b44bbbf) 
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#
8############################################################ DESCRIPTION
9#
10# Display process activity
11#
12############################################################ PROBE
13
14case "$PROFILE" in
15proc)
16	: ${PROBE:=$( echo \
17		proc:::create, \
18		proc:::exec, \
19		proc:::exec-failure, \
20		proc:::exec-success, \
21		proc:::exit, \
22		proc:::signal-clear, \
23		proc:::signal-discard, \
24		proc:::signal-send )}
25	;;
26proc-signal)
27	: ${PROBE:=$( echo \
28		proc:::signal-clear, \
29		proc:::signal-discard, \
30		proc:::signal-send )}
31	;;
32proc-status)
33	: ${PROBE:=$( echo \
34		proc:::create, \
35		proc:::exec, \
36		proc:::exec-failure, \
37		proc:::exec-success, \
38		proc:::exit )}
39	;;
40*)
41	: ${PROBE:=proc:::${PROFILE#proc-}}
42esac
43
44############################################################ ACTIONS
45
46exec 9<<EOF
47this int	sig;
48this pid_t	pid;
49this string	details;
50this string	exec_arg0;
51
52inline string probealias[string name] =
53	name == "create" ?		"FORK" :
54	name == "exec" ?		"EXEC" :
55	name == "exec-failure" ?	"FAIL" :
56	name == "exec-success" ?	"INIT" :
57	name == "exit" ?		"EXIT" :
58	name == "signal-clear" ?	"CLEAR" :
59	name == "signal-discard" ?	"DISCARD" :
60	name == "signal-send" ?		"SEND" :
61	name;
62
63$PROBE /* probe ID $ID */
64{${TRACE:+
65	printf("<$ID>");}
66	this->details = "";
67}
68
69proc:::create /* probe ID $(( $ID + 1 )) */
70{${TRACE:+
71	printf("<$(( $ID + 1 ))>");
72}
73	$( pproc -P _create "(struct proc *)args[0]" )
74
75	/* details = "pid <pid of args[0]> -- <proc args of args[0]>" */
76	this->details = strjoin(
77		strjoin("pid ", lltostr(this->pid_create)),
78		strjoin(" -- ", this->args_create));
79}
80
81proc:::exec /* probe ID $(( $ID + 2 )) */
82{${TRACE:+
83	printf("<$(( $ID + 2 ))");}
84	this->details = this->exec_arg0 = stringof(arg0);
85}
86
87proc:::exec-failure /* probe ID $(( $ID + 3 )) */
88{${TRACE:+
89	printf("<$(( $ID + 3 ))>");
90}
91	/* details = "<arg0 from proc:::exec>: <strerror of arg0> (<arg0>)" */
92	this->details = strjoin(
93		strjoin(this->exec_arg0, ": "),
94		strjoin(strerror[(int)arg0],
95			strjoin(" (", strjoin(lltostr((int)arg0), ")"))));
96}
97
98proc:::exec-success /* probe ID $(( $ID + 4 )) */
99{${TRACE:+
100	printf("<$(( $ID + 4 ))>");}
101	this->details = this->args0;
102}
103
104proc:::exit /* probe ID $(( $ID + 5 )) */
105{${TRACE:+
106	printf("<$(( $ID + 5 ))>");}
107	this->details = child_signal_string[(int)arg0];
108}
109
110proc:::signal-clear /* probe ID $(( $ID + 6 )) */
111{${TRACE:+
112	printf("<$(( $ID + 6 ))>");}
113	this->pid = (pid_t)((ksiginfo_t *)args[1])->ksi_info.si_pid;
114	this->sig = (int)arg0;
115}
116
117proc:::signal-discard, proc:::signal-send /* probe ID $(( $ID + 7 )) */
118{${TRACE:+
119	printf("<$(( $ID + 7 ))>");}
120	this->pid = (pid_t)((struct proc *)args[1])->p_pid;
121	this->sig = (int)arg2;
122}
123
124proc:::signal-clear,
125proc:::signal-discard,
126proc:::signal-send /* probe ID $(( $ID + 8 )) */
127{${TRACE:+
128	printf("<$(( $ID + 8 ))>");
129}
130	/* details = "<signal>[<num>] pid <pid>" */
131	this->details = strjoin(strjoin(signal_string[this->sig], "["),
132		strjoin(strjoin(lltostr(this->sig), "] pid "),
133		lltostr(this->pid)));
134}
135
136proc:::signal-send, proc:::signal-discard /* probe ID $(( $ID + 9 )) */
137{${TRACE:+
138	printf("<$(( $ID + 9 ))>");
139}
140	$( pproc -P _signal "(struct proc *)args[1]" )
141
142	this->details = strjoin(this->details,
143		strjoin(" -- ", this->args_signal));
144}
145EOF
146ACTIONS=$( cat <&9 )
147ID=$(( $ID + 10 ))
148
149############################################################ EVENT DETAILS
150
151if [ ! "$CUSTOM_DETAILS" ]; then
152exec 9<<EOF
153	/*
154	 * Print details
155	 */
156	printf("%s %s", probealias[probename], this->details);
157EOF
158EVENT_DETAILS=$( cat <&9 )
159fi
160
161################################################################################
162# END
163################################################################################
164