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1 | # Copyright 2016 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 | standard_testfile | |
17 | ||
18 | # Test a thread is doing step-over a syscall instruction which is exit, | |
19 | # and GDBserver should cleanup its state of step-over properly. | |
20 | ||
21 | set syscall_insn "" | |
22 | ||
23 | # Define the syscall instruction for each target. | |
24 | ||
25 | if { [istarget "i\[34567\]86-*-linux*"] || [istarget "x86_64-*-linux*"] } { | |
26 | set syscall_insn "\[ \t\](int|syscall|sysenter)\[ \t\]" | |
27 | } elseif { [istarget "aarch64*-*-linux*"] || [istarget "arm*-*-linux*"] } { | |
28 | set syscall_insn "\[ \t\](swi|svc)\[ \t\]" | |
29 | } else { | |
30 | unsupported "unknown syscall instruction" | |
31 | return -1 | |
32 | } | |
33 | ||
34 | if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} { | |
35 | untested $testfile.exp | |
36 | return -1 | |
37 | } | |
38 | ||
39 | # Start with a fresh gdb. | |
40 | clean_restart ${testfile} | |
41 | if ![runto_main] { | |
bc6c7af4 | 42 | fail "can't run to main" |
f50bf8e5 YQ |
43 | return -1 |
44 | } | |
45 | ||
46 | gdb_test "set follow-fork-mode child" | |
47 | gdb_test "set detach-on-fork off" | |
48 | ||
49 | # Step 1, find the syscall instruction address. | |
50 | ||
51 | gdb_test "break _exit" "Breakpoint $decimal at .*" | |
52 | ||
53 | # Hit the breakpoint on _exit. The address of syscall insn is recorded. | |
54 | ||
55 | gdb_test "continue" \ | |
56 | "Continuing\\..*Breakpoint $decimal.*_exit \\(.*\\).*" \ | |
57 | "continue to exit" | |
58 | ||
59 | gdb_test "display/i \$pc" ".*" | |
60 | ||
61 | # Single step until we see a syscall insn or we reach the | |
62 | # upper bound of loop iterations. | |
63 | set msg "find syscall insn in exit" | |
64 | set steps 0 | |
65 | set max_steps 1000 | |
66 | gdb_test_multiple "stepi" $msg { | |
67 | -re ".*$syscall_insn.*$gdb_prompt $" { | |
68 | pass $msg | |
69 | } | |
70 | -re "x/i .*=>.*\r\n$gdb_prompt $" { | |
71 | incr steps | |
72 | if {$steps == $max_steps} { | |
73 | fail $msg | |
74 | } else { | |
75 | send_gdb "stepi\n" | |
76 | exp_continue | |
77 | } | |
78 | } | |
79 | } | |
80 | ||
81 | if {$steps == $max_steps} { | |
82 | return | |
83 | } | |
84 | ||
85 | # Remove the display | |
86 | gdb_test_no_output "delete display 1" | |
87 | ||
88 | set syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"] | |
89 | ||
90 | gdb_test "continue" "exited normally.*" "continue to end, first time" | |
91 | gdb_test "inferior 1" ".*Switching to inferior 1.*" \ | |
92 | "switch back to inferior 1, first time" | |
93 | ||
94 | delete_breakpoints | |
95 | ||
96 | gdb_test "break marker" | |
97 | ||
98 | gdb_test "continue" "Continuing\\..*Breakpoint $decimal, .*" \ | |
99 | "continue to marker, first time" | |
100 | ||
101 | # Step 2, create a breakpoint which evaluates false, and force it | |
102 | # evaluated on the target side. | |
103 | ||
104 | set test "set breakpoint condition-evaluation target" | |
105 | gdb_test_multiple $test $test { | |
106 | -re "warning: Target does not support breakpoint condition evaluation.\r\nUsing host evaluation mode instead.\r\n$gdb_prompt $" { | |
107 | # Target doesn't support breakpoint condition evaluation | |
108 | # on its side, but it is no harm to run the test. | |
109 | } | |
110 | -re "^$test\r\n$gdb_prompt $" { | |
111 | } | |
112 | } | |
113 | ||
114 | gdb_test "break \*$syscall_insn_addr if main == 0" \ | |
115 | "Breakpoint \[0-9\]* at .*" | |
116 | ||
117 | # Resume the child process, and the step-over is being done. | |
118 | ||
119 | gdb_test "continue" "exited normally.*" "continue to end, second time" | |
120 | gdb_test "inferior 1" ".*Switching to inferior 1.*" \ | |
121 | "switch back to inferior 1, second time" | |
122 | ||
123 | # Switch back to the parent process, continue to the marker to | |
124 | # test GDBserver's state is still correct. | |
125 | ||
126 | gdb_test "continue" "Continuing\\..*Breakpoint $decimal, .*" \ | |
127 | "continue to marker, second time" |