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9c317b71 YQ |
1 | # This testcase is part of GDB, the GNU debugger. |
2 | ||
618f726f | 3 | # Copyright 2011-2016 Free Software Foundation, Inc. |
9c317b71 YQ |
4 | |
5 | # This program is free software; you can redistribute it and/or modify | |
6 | # it under the terms of the GNU General Public License as published by | |
7 | # the Free Software Foundation; either version 3 of the License, or | |
8 | # (at your option) any later version. | |
9 | # | |
10 | # This program is distributed in the hope that it will be useful, | |
11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | # GNU General Public License for more details. | |
14 | # | |
15 | # You should have received a copy of the GNU General Public License | |
16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | ||
18 | if { ![support_displaced_stepping] } { | |
19 | unsupported "displaced stepping" | |
20 | return -1 | |
21 | } | |
22 | ||
23 | set syscall_insn "" | |
24 | ||
25 | # Define the syscall instruction for each target. | |
26 | ||
27 | if { [istarget "i\[34567\]86-*-linux*"] || [istarget "x86_64-*-linux*"] } { | |
9a7f938f | 28 | set syscall_insn "\[ \t\](int|syscall|sysenter)\[ \t\]" |
99fd02d9 | 29 | } elseif { [istarget "aarch64*-*-linux*"] || [istarget "arm*-*-linux*"] } { |
5d0a3b53 | 30 | set syscall_insn "\[ \t\](swi|svc)\[ \t\]" |
9c317b71 YQ |
31 | } else { |
32 | return -1 | |
33 | } | |
34 | ||
0b47da9f YQ |
35 | proc check_pc_after_cross_syscall { syscall syscall_insn_next_addr } { |
36 | set syscall_insn_next_addr_found [get_hexadecimal_valueof "\$pc" "0"] | |
37 | ||
38 | set test "single step over $syscall final pc" | |
39 | if {$syscall_insn_next_addr != 0 | |
40 | && $syscall_insn_next_addr == $syscall_insn_next_addr_found} { | |
41 | pass $test | |
42 | } else { | |
43 | fail $test | |
44 | } | |
45 | } | |
9c317b71 | 46 | |
0b47da9f YQ |
47 | # Restart GDB and set up the test. Return a list in which the first one |
48 | # is the address of syscall instruction and the second one is the address | |
49 | # of the next instruction address of syscall instruction. If anything | |
50 | # wrong, the two elements of list are -1. | |
9c317b71 | 51 | |
0b47da9f YQ |
52 | proc setup { syscall } { |
53 | global gdb_prompt syscall_insn | |
9c317b71 | 54 | |
0b47da9f | 55 | set testfile "disp-step-$syscall" |
9c317b71 | 56 | |
0b47da9f | 57 | clean_restart $testfile |
9c317b71 | 58 | |
0b47da9f YQ |
59 | if { ![runto main] } then { |
60 | fail "run to main ($syscall)" | |
61 | return -1 | |
62 | } | |
9c317b71 | 63 | |
0b47da9f YQ |
64 | # Delete the breakpoint on main. |
65 | gdb_test_no_output "delete break 1" | |
9c317b71 | 66 | |
0b47da9f | 67 | gdb_test_no_output "set displaced-stepping off" |
9c317b71 | 68 | |
0b47da9f | 69 | gdb_test "break $syscall" "Breakpoint \[0-9\]* at .*" |
9c317b71 | 70 | |
0b47da9f YQ |
71 | gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, (.* in |__libc_|)$syscall \\(\\).*" \ |
72 | "continue to $syscall (1st time)" | |
73 | # Hit the breakpoint on $syscall for the first time. In this time, | |
74 | # we will let PLT resolution done, and the number single steps we will | |
75 | # do later will be reduced. | |
9c317b71 | 76 | |
0b47da9f YQ |
77 | gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, (.* in |__libc_|)$syscall \\(\\).*" \ |
78 | "continue to $syscall (2nd time)" | |
79 | # Hit the breakpoint on $syscall for the second time. In this time, | |
80 | # the address of syscall insn and next insn of syscall are recorded. | |
9c317b71 | 81 | |
0b47da9f YQ |
82 | gdb_test "display/i \$pc" ".*" |
83 | ||
84 | # Single step until we see a syscall insn or we reach the | |
85 | # upper bound of loop iterations. | |
86 | set msg "find syscall insn in $syscall" | |
87 | set steps 0 | |
88 | set max_steps 1000 | |
89 | gdb_test_multiple "stepi" $msg { | |
90 | -re ".*$syscall_insn.*$gdb_prompt $" { | |
91 | pass $msg | |
92 | } | |
93 | -re "x/i .*=>.*\r\n$gdb_prompt $" { | |
94 | incr steps | |
95 | if {$steps == $max_steps} { | |
96 | fail $msg | |
97 | } else { | |
98 | send_gdb "stepi\n" | |
99 | exp_continue | |
9c317b71 | 100 | } |
9c317b71 | 101 | } |
0b47da9f YQ |
102 | } |
103 | ||
104 | if {$steps == $max_steps} { | |
105 | return { -1, -1 } | |
106 | } | |
107 | ||
108 | set syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"] | |
109 | if {[gdb_test "stepi" "x/i .*=>.*" "stepi $syscall insn"] != 0} { | |
110 | return { -1, -1 } | |
111 | } | |
112 | return [list $syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"]] | |
113 | } | |
9c317b71 | 114 | |
0b47da9f YQ |
115 | proc disp_step_cross_syscall { syscall } { |
116 | with_test_prefix "$syscall" { | |
117 | global syscall_insn | |
118 | global gdb_prompt | |
119 | ||
120 | set testfile "disp-step-$syscall" | |
121 | ||
122 | if [build_executable ${testfile}.exp ${testfile} ${testfile}.c {debug}] { | |
123 | untested ${testfile}.exp | |
0a251e08 YQ |
124 | return -1 |
125 | } | |
9c317b71 | 126 | |
0b47da9f YQ |
127 | set ret [setup $syscall] |
128 | ||
129 | set syscall_insn_addr [lindex $ret 0] | |
130 | set syscall_insn_next_addr [lindex $ret 1] | |
131 | if { $syscall_insn_addr == -1 } { | |
32d2e5d6 PA |
132 | return -1 |
133 | } | |
9c317b71 | 134 | |
0a251e08 YQ |
135 | gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, (.* in |__libc_|)$syscall \\(\\).*" \ |
136 | "continue to $syscall (3rd time)" | |
9c317b71 | 137 | |
0a251e08 YQ |
138 | # Hit the breakpoint on $syscall for the third time. In this time, we'll set |
139 | # breakpoint on the syscall insn we recorded previously, and single step over it. | |
9c317b71 | 140 | |
0a251e08 YQ |
141 | set syscall_insn_bp 0 |
142 | gdb_test_multiple "break \*$syscall_insn_addr" "break on syscall insn" { | |
143 | -re "Breakpoint (\[0-9\]*) at .*$gdb_prompt $" { | |
144 | set syscall_insn_bp $expect_out(1,string) | |
145 | pass "break on syscall insns" | |
146 | } | |
9c317b71 | 147 | } |
9c317b71 | 148 | |
0a251e08 YQ |
149 | gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, .*" \ |
150 | "continue to syscall insn $syscall" | |
9c317b71 | 151 | |
0a251e08 | 152 | gdb_test_no_output "set displaced-stepping on" |
9c317b71 | 153 | |
0a251e08 | 154 | # Check the address of next instruction of syscall. |
32d2e5d6 PA |
155 | if {[gdb_test "stepi" "x/i .*=>.*" "single step over $syscall"] != 0} { |
156 | return -1 | |
69dc1c4d | 157 | } |
0a251e08 | 158 | |
0b47da9f | 159 | check_pc_after_cross_syscall $syscall $syscall_insn_next_addr |
dfe2ac14 | 160 | |
0a251e08 | 161 | # Delete breakpoint syscall insns to avoid interference to other syscalls. |
0b47da9f | 162 | delete_breakpoints |
9a7f938f | 163 | |
0b47da9f | 164 | gdb_test "break marker" "Breakpoint.*at.* file .*${testfile}.c, line.*" |
0a251e08 YQ |
165 | gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, marker \\(\\) at.*" \ |
166 | "continue to marker ($syscall)" | |
9a7f938f | 167 | } |
0a251e08 | 168 | } |
9c317b71 YQ |
169 | |
170 | disp_step_cross_syscall "fork" | |
171 | disp_step_cross_syscall "vfork" |