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1d506c26 | 1 | # Copyright 2018-2024 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 | # This testcase is a regression test for a regression in the in-line | |
17 | # step-over machinery. If a resumption that starts a step-over | |
18 | # failed, a following resumption would make GDB hang forever: | |
19 | # | |
20 | # (gdb) b *0 | |
21 | # Breakpoint 2 at 0x0 | |
22 | # continue | |
23 | # Continuing. | |
24 | # Warning: | |
25 | # Cannot insert breakpoint 2. | |
26 | # Cannot access memory at address 0x0 | |
27 | # | |
28 | # Command aborted. | |
29 | # delete breakpoints | |
30 | # Delete all breakpoints? (y or n) y | |
31 | # (gdb) b function | |
32 | # Breakpoint 3 at 0x40048b: file test.c, line 33. | |
33 | # continue | |
34 | # Continuing. | |
35 | # *GDB hangs forever* | |
36 | ||
37 | standard_testfile | |
38 | ||
39 | if {[build_executable "failed to prepare" $testfile $srcfile debug]} { | |
40 | return -1 | |
41 | } | |
42 | ||
43 | # DISPLACED indicates whether to use displaced-stepping. | |
acb994fa | 44 | proc do_test {displaced breakpoint_always_inserted} { |
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45 | global gdb_prompt decimal |
46 | global srcfile binfile | |
47 | ||
48 | clean_restart $binfile | |
49 | ||
50 | gdb_test_no_output "set displaced-stepping $displaced" | |
acb994fa | 51 | gdb_test_no_output "set breakpoint always-inserted $breakpoint_always_inserted" |
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52 | |
53 | if ![runto_main] { | |
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54 | return -1 |
55 | } | |
56 | ||
57 | # We rely on not being able to set a breakpoint at 0, as proxy for | |
58 | # any kind of breakpoint insertion failure. If we can examine | |
59 | # what's at memory address 0, it is possible that we could also | |
60 | # execute it. | |
61 | if [is_address_zero_readable] { | |
62 | untested "memory at address 0 is possibly executable" | |
63 | return | |
64 | } | |
65 | ||
66 | # Set a breakpoint that fails to insert. | |
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67 | if { $breakpoint_always_inserted == "on" } { |
68 | gdb_test "b *0" "Breakpoint $decimal at 0x0.*" | |
69 | } else { | |
70 | gdb_test "b *0" "Breakpoint $decimal at 0x0" | |
71 | } | |
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72 | |
73 | gdb_test "continue" \ | |
74 | "Command aborted\\." \ | |
75 | "continue aborts" | |
76 | ||
77 | # Delete the "bad" breakpoint and try continuing again. | |
78 | delete_breakpoints | |
79 | gdb_test "b function" "Breakpoint $decimal .*$srcfile.*" | |
80 | ||
81 | gdb_test "continue" \ | |
82 | "Breakpoint $decimal, function \\(\\) at .*$srcfile:.*" \ | |
83 | "continue to function" | |
84 | } | |
85 | ||
86 | # This testcase exercises a regression with the in-line step-over | |
87 | # machinery. So make sure this runs with displaced stepping disabled, | |
88 | # and for good measure, also try with displaced stepping enabled. | |
89 | foreach_with_prefix displaced-stepping {"off" "on"} { | |
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90 | foreach_with_prefix breakpoint-always-inserted {"off" "on"} { |
91 | do_test ${displaced-stepping} ${breakpoint-always-inserted} | |
92 | } | |
eea61984 | 93 | } |