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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
# Copyright 1998-2018 Free Software Foundation, Inc.
#
# 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 3 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.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This test helps making sure QTro support doesn't regress. If the
# stub supports the newer qXfer:traceframe-info:read, then the QTro
# paths in the stub are never exercised. PR remote/15455 is an
# example of a regression that unfortunately went unnoticed for long.
load_lib trace-support.exp
standard_testfile
if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
return -1
}
clean_restart $testfile
if ![runto_main] {
fail "can't run to main to check for trace support"
return -1
}
# Check whether we're testing with the remote or extended-remote
# targets, and whether the target supports tracepoints.
if ![gdb_is_target_remote] {
return -1
}
if ![gdb_target_supports_trace] {
unsupported "current target does not support trace"
return -1
}
# Run a trace session, stop it, and then inspect the resulting trace
# frame (IOW, returns while tfind mode is active).
proc prepare_for_trace_disassembly { } {
global gdb_prompt
gdb_breakpoint "end" qualified
gdb_test "trace subr" "Tracepoint .*" \
"tracepoint at subr"
gdb_trace_setactions "define action" \
"" \
"collect parm" "^$"
gdb_test_no_output "tstart"
gdb_test "continue" ".*Breakpoint \[0-9\]+, end .*" \
"advance through tracing"
gdb_test "tstatus" ".*Collected 1 trace frame.*" \
"collected 1 trace frame"
gdb_test_no_output "tstop"
gdb_tfind_test "tfind start" "start" "0"
}
clean_restart $testfile
runto_main
# Trace once, issuing a tstatus, so that GDB tries
# qXfer:trace-frame-info:read.
prepare_for_trace_disassembly
# Now check whether the packet is supported.
set traceframe_info_supported -1
set test "probe for traceframe-info support"
gdb_test_multiple "show remote traceframe-info-packet" $test {
-re ".*Support for .* is auto-detected, currently (\[a-z\]*).*$gdb_prompt $" {
set status $expect_out(1,string)
if { $status == "enabled" } {
set traceframe_info_supported 1
} else {
set traceframe_info_supported 0
}
pass $test
}
}
if { $traceframe_info_supported == -1 } {
return -1
}
# Check whether we're testing with our own GDBserver.
set is_gdbserver [target_is_gdbserver]
if { $is_gdbserver == -1 } {
return -1
}
# Now disassemble (IOW, read from read-only memory) while inspecting a
# trace frame, twice. Once with qXfer:traceframe-info:read left to
# auto, and once with it disabled, exercising the QTro fallback path
# in the stub side.
foreach tfinfo { auto off } {
with_test_prefix "qXfer:traceframe-info:read $tfinfo" {
clean_restart $testfile
runto_main
gdb_test_no_output "set remote traceframe-info-packet $tfinfo"
prepare_for_trace_disassembly
set test "trace disassembly"
gdb_test_multiple "disassemble subr" $test {
-re "<(\.\[0-9\]+|)>:.*End of assembler dump.*$gdb_prompt $" {
pass $test
}
-re "Cannot access memory.*$gdb_prompt $" {
if { $traceframe_info_supported == 0 } {
# If qXfer:traceframe-info:read is not supported,
# then there should be QTro support.
fail $test
} elseif { $tfinfo == off && $is_gdbserver == 1 } {
# We we're testing with GDBserver, we know both
# qXfer:traceframe-info:read and QTro are
# supported (although supporting the former only
# would be sufficient), so issue a FAIL instead of
# UNSUPPORTED, giving us better visibility of QTro
# regressions.
fail $test
} else {
# Otherwise, qXfer:traceframe-info:read is
# supported, making QTro optional, so this isn't
# really a failure.
unsupported "$test (no QTro support)"
}
}
}
}
}
|
