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7a0c8b94 SM |
1 | # Copyright 2022 Free Software Foundation, Inc. |
2 | ||
3 | # This program is free software; you can redistribute it and/or modify | |
4 | # it under the terms of the GNU General Public License as published by | |
5 | # the Free Software Foundation; either version 3 of the License, or | |
6 | # (at your option) any later version. | |
7 | # | |
8 | # This program is distributed in the hope that it will be useful, | |
9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | # GNU General Public License for more details. | |
12 | # | |
13 | # You should have received a copy of the GNU General Public License | |
14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | ||
16 | # Test doing a "next" on a thread during which forks or vforks happen in other | |
17 | # threads. | |
18 | ||
19 | standard_testfile | |
20 | ||
21 | # Line where to stop the main thread. | |
22 | set break_here_line [gdb_get_line_number "break here"] | |
23 | ||
24 | # Build executables, one for each fork flavor. | |
25 | foreach_with_prefix fork_func {fork vfork} { | |
26 | set opts [list debug pthreads additional_flags=-DFORK_FUNC=${fork_func}] | |
27 | if { [build_executable "failed to prepare" \ | |
28 | ${testfile}-${fork_func} ${srcfile} $opts] } { | |
29 | return | |
30 | } | |
31 | } | |
32 | ||
33 | # If testing against GDBserver, consume all it its output. | |
34 | ||
35 | proc drain_gdbserver_output { } { | |
36 | if { [info exists ::server_spawn_id] } { | |
37 | gdb_test_multiple "" "" { | |
38 | -i "$::server_spawn_id" | |
39 | -timeout 0 | |
40 | -re ".+" { | |
41 | exp_continue | |
42 | } | |
43 | } | |
44 | } | |
45 | } | |
46 | ||
47 | # Run the test with the given parameters: | |
48 | # | |
49 | # - FORK_FUNC: fork flavor, "fork" or "vfork". | |
50 | # - TARGET-NON-STOP: "maintenance set target-non-stop" value, "auto", "on" or | |
51 | # "off". | |
52 | # - NON-STOP: "set non-stop" value, "on" or "off". | |
53 | # - DISPLACED-STEPPING: "set displaced-stepping" value, "auto", "on" or "off". | |
54 | ||
55 | proc do_test { fork_func target-non-stop non-stop displaced-stepping } { | |
56 | save_vars { ::GDBFLAGS } { | |
57 | append ::GDBFLAGS " -ex \"maintenance set target-non-stop ${target-non-stop}\"" | |
58 | append ::GDBFLAGS " -ex \"set non-stop ${non-stop}\"" | |
59 | clean_restart ${::binfile}-${fork_func} | |
60 | } | |
61 | ||
62 | gdb_test_no_output "set displaced-stepping ${displaced-stepping}" | |
63 | ||
64 | if { ![runto_main] } { | |
65 | return | |
66 | } | |
67 | ||
68 | # The "Detached after (v)fork" messages get in the way in non-stop, disable | |
69 | # them. | |
70 | gdb_test_no_output "set print inferior-events off" | |
71 | ||
72 | # Advance the next-ing thread to the point where we'll execute the nexts. | |
73 | # Leave the breakpoint in: it will force GDB to step over it while next-ing, | |
74 | # which exercises some additional code paths. | |
75 | gdb_test "break $::break_here_line" "Breakpoint $::decimal at $::hex.*" | |
76 | gdb_test "continue" "hit Breakpoint $::decimal, main.*" | |
77 | ||
78 | # Next an arbitrary number of times over the lines of the loop. | |
79 | # | |
80 | # It is useful to bump this number to a larger value (e.g. 200) to stress | |
81 | # test more, but it makes the test case run for considerably longer. If | |
82 | # you increase the number of loops, you might want to adjust the alarm | |
83 | # time in the .c file accordingly. | |
84 | for { set i 0 } { $i < 20 } { incr i } { | |
85 | # If testing against GDBserver, the forking threads cause a lot of | |
86 | # "Detaching from process XYZ" messages to appear. If we don't consume | |
87 | # that output, GDBserver eventually blocks on a full stderr. Drain it | |
88 | # once every loop. It may not be needed for 20 iterations, but it's | |
89 | # needed if you increase to 200 iterations. | |
90 | drain_gdbserver_output | |
91 | ||
92 | with_test_prefix "i=$i" { | |
93 | if { [gdb_test "next" "other line.*" "next to other line"] != 0 } { | |
94 | return | |
95 | } | |
96 | ||
97 | if { [gdb_test "next" "for loop.*" "next to for loop"] != 0 } { | |
98 | return | |
99 | } | |
100 | ||
101 | if { [gdb_test "next" "break here.*" "next to break here"] != 0} { | |
102 | return | |
103 | } | |
104 | } | |
105 | } | |
106 | } | |
107 | ||
108 | foreach_with_prefix fork_func {fork vfork} { | |
109 | foreach_with_prefix target-non-stop {auto on off} { | |
110 | foreach_with_prefix non-stop {off on} { | |
111 | foreach_with_prefix displaced-stepping {auto on off} { | |
112 | do_test ${fork_func} ${target-non-stop} ${non-stop} ${displaced-stepping} | |
113 | } | |
114 | } | |
115 | } | |
116 | } |