1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
# Simple test that systemtap can share the buffer with other scripts.
set test "sharedbuf"
set TEST_NAME "$subdir/$test"
if {![installtest_p]} { untested $TEST_NAME; return }
set c1 0
set c2 0
set test2 0
proc run_test2 {} {
global test2 c2 srcdir subdir
# Ensure this test is only run once.
if { $test2 != 0 } {
return
}
incr test2
# Run a guest script which uses print and warn. The 'print'
# output should go to the relay host and the 'warn' output should
# come here.
if {[catch {exec stap $srcdir/$subdir/hello2.stp -DRELAY_GUEST=test1} res]} {
# Check that the guest outputs a warning message. Note we're
# using 'regexp', because modpost can output a warning of its
# own.
verbose -log $res
if {[regexp ".*WARNING: warning" $res]} {
pass "shared buffer guest2"
incr c2
} else {
fail "shared buffer guest2"
}
} else {
# We didn't get the warning message. Fail.
verbose -log $res
fail "shared buffer guest2"
}
}
# Run a relay host script. Output from relay guest scripts should be
# output by the relay host.
spawn stap $srcdir/$subdir/$test.stp -DRELAY_HOST=test1
expect {
-timeout 120
"Host: begin\r\n" {
# The relay host has started successfully.
pass "shared buffer hosting"
# Run a guest script which uses printf.
if {[catch {exec stap $srcdir/$subdir/hello.stp -DRELAY_GUEST=test1} res]} {
verbose -log $res
# Ignore the possible modpost warning message.
if {[regexp "^WARNING: \"\.?stp_print_flush_test1\".+ undefined!" $res]} {
pass "shared buffer guest"
incr c1
} else {
fail "shared buffer guest"
# Even if the 1st guest script failed, try to run the
# 2nd guest script.
run_test2
}
} else {
verbose -log $res
pass "shared buffer guest"
incr c1
}
exp_continue
}
"HelloWorld" {
# The relay host received the output from the 1st guest script.
if { $c1 == 1 } { incr c1 }
# Run the 2nd guest script.
run_test2
exp_continue
}
"PrintSystemtap" {
# The relay host received the output from the 2nd guest script.
if { $c2 == 1 } { incr c2 }
# Run a guest script which tries to use nonexist buffer. This
# should fail (since relay host 'test2' doesn't exist).
if {[catch {exec stap $srcdir/$subdir/hello.stp -DRELAY_GUEST=test2} res]} {
verbose -log $res
pass "nonexist buffer sharing"
} else {
verbose -log $res
fail "nonexist buffer sharing"
}
}
eof {
fail "shared buffer hosting. unexpected EOF"
}
}
kill -INT -[exp_pid] 2
if { $c1 == 2 && $c2 == 2 } {
pass "buffer sharing"
} else {
fail "buffer sharing ($c1, $c2)"
}
catch { close }
wait
|
