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4a94e368 | 1 | # Copyright 2017-2022 Free Software Foundation, Inc. |
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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 | # When debugging with "target remote |", the inferior's output is | |
17 | # connected to a pipe, and if GDB doesn't flush the pipe while the | |
18 | # inferior is running and the pipe becomes full, then the inferior | |
19 | # deadlocks: | |
20 | # | |
21 | # 1. User sets breakpoint, and types "continue" | |
22 | # | |
23 | # 2. Inferior prints to stdout/stderr before reaching breakpoint | |
24 | # location. | |
25 | # | |
26 | # 3. The output pipe becomes full, so the inferior blocks forever in | |
27 | # the printf/write call. | |
28 | # | |
29 | # 4. The breakpoint is never reached. | |
30 | ||
31 | if [target_info exists gdb,noinferiorio] { | |
32 | verbose "Skipping because of noinferiorio." | |
33 | return | |
34 | } | |
35 | ||
36 | standard_testfile | |
37 | ||
38 | if [prepare_for_testing "failed to prepare" $testfile {} {debug}] { | |
39 | return -1 | |
40 | } | |
41 | ||
65a33d75 | 42 | if {![runto_main]} { |
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43 | return |
44 | } | |
45 | ||
46 | set printing_done_line [gdb_get_line_number "printing done"] | |
47 | gdb_test "break $printing_done_line" ".*" "set breakpoint after printing" | |
48 | ||
49 | send_gdb "continue\n" | |
50 | ||
51 | set expected_lines 3000 | |
52 | set more 1 | |
53 | set i 0 | |
54 | while {$more} { | |
55 | set more 0 | |
56 | gdb_expect { | |
57 | -i $inferior_spawn_id | |
58 | -ex "this is line number $i" { | |
59 | incr i | |
60 | if {$i != $expected_lines} { | |
61 | set more 1 | |
62 | } | |
63 | } | |
64 | } | |
65 | } | |
66 | ||
67 | gdb_assert {$i == $expected_lines} "saw all lines" | |
68 | ||
69 | set test "breakpoint reached" | |
70 | gdb_test_multiple "" $test { | |
71 | -re "Breakpoint .* main .*$srcfile:$printing_done_line.*$gdb_prompt $" { | |
72 | pass $test | |
73 | } | |
74 | } |