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
|
#
# Copyright (C) 2014 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ART debugging. ART uses SIGSEGV signals for internal purposes. To allow
# gdb to debug programs using ART we need to treat this signal specially. We
# also set a breakpoint in a libart.so function to stop when the program
# hits an unexpected breakpoint
set $art_debug_enabled = 0
define art-on
if $art_debug_enabled == 0
# deal with SIGSEGV signals
handle SIGSEGV noprint nostop pass
# set a breakpoint and record its number
set breakpoint pending on
break art_sigsegv_fault
set $art_bpnum = $bpnum
commands $art_bpnum
silent
printf "Caught SIGSEGV in user program\n"
end
set breakpoint pending auto
printf "ART debugging mode is enabled.\n"
printf "If you are debugging a native only process, you need to\n"
printf "re-enable normal SIGSEGV handling using this command:\n"
printf " handle SIGSEGV print stop\n"
set $art_debug_enabled = 1
else
printf "ART debugging mode is already enabled.\n"
end
end
document art-on
Enter ART debugging mode. In ART debugging mode, SIGSEGV signals are ignored
by gdb unless they are not handled by ART itself. A breakpoint is
set to stop the program when an unexpected SIGSEGV signal is
encountered.
To switch ART debugging mode off, use "art-off"
end
define art-off
if $art_debug_enabled == 1
# restore SIGSEGV to its default
handle SIGSEGV print stop pass
# delete our breakpoint
delete $art_bpnum
set $art_debug_enabled = 0
printf "ART debugging mode is disabled.\n"
end
end
document art-off
Leave ART debugging mode. Signal handling is restored to default settings.
Use the command "art-on" to enable ART debugging mode.
end
|
