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618f726f | 1 | # Copyright (C) 2015-2016 Free Software Foundation, Inc. |
f6bb7db3 YQ |
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 | if ![supports_reverse] { | |
17 | return | |
18 | } | |
19 | ||
f6bb7db3 YQ |
20 | standard_testfile |
21 | ||
22 | if {[prepare_for_testing $testfile.exp $testfile $srcfile \ | |
23 | [list debug]]} { | |
24 | untested ${testfile}.exp | |
25 | return -1 | |
26 | } | |
27 | if { ![runto main] } then { | |
28 | fail "run to main" | |
29 | return | |
30 | } | |
31 | ||
3263bceb YQ |
32 | # Read function name from testcases[N]. |
33 | ||
34 | proc read_testcase { n } { | |
35 | global gdb_prompt | |
36 | ||
37 | set result -1 | |
38 | gdb_test_multiple "print testcases\[${n}\]" "read name of test case ${n}" { | |
39 | -re "\[$\].*= .*<(.*)>.*$gdb_prompt $" { | |
40 | set result $expect_out(1,string) | |
41 | } | |
42 | -re "$gdb_prompt $" { } | |
43 | } | |
44 | ||
45 | return $result | |
46 | } | |
47 | ||
f6bb7db3 YQ |
48 | # In each function FUNC, GDB turns on process record, and single step |
49 | # until program goes to the end of the function. Then, single step | |
50 | # backward. In each of forward single step and backward single step, | |
51 | # the contents of registers are saved, and test compares them. If | |
52 | # there is any differences, a FAIL is emitted. | |
53 | ||
54 | proc test { func } { | |
55 | global hex decimal | |
56 | global gdb_prompt | |
57 | ||
58 | with_test_prefix "$func" { | |
59 | gdb_breakpoint $func | |
60 | gdb_test "continue" | |
61 | ||
62 | set last_insn "" | |
63 | set test "disassemble $func" | |
64 | gdb_test_multiple $test $test { | |
65 | -re ".*($hex) <\\+$decimal>:\[^\r\n\]+\r\nEnd of assembler dump\.\r\n$gdb_prompt $" { | |
66 | set last_insn $expect_out(1,string) | |
67 | } | |
68 | } | |
69 | if { $last_insn == "" } { | |
70 | fail "find the last instruction of function $func" | |
71 | } | |
72 | ||
73 | # Activate process record/replay | |
74 | gdb_test_no_output "record" "Turn on process record" | |
75 | ||
76 | # Registers contents before each forward single step. | |
77 | set count 0 | |
78 | for {} {$count < 500} {incr count} { | |
79 | gdb_test_multiple "x/i \$pc" "" { | |
80 | -re ".* ($hex) <.*>:\[ \t\]*(.*)\r\n$gdb_prompt $" { | |
81 | set insn_addr $expect_out(1,string) | |
82 | ||
83 | if [expr {$last_insn == $insn_addr}] { | |
84 | break | |
85 | } | |
86 | ||
87 | set insn_array($count) $expect_out(2,string) | |
88 | } | |
89 | } | |
90 | ||
91 | set pre_regs($count) [capture_command_output "info all-registers" ""] | |
92 | gdb_test "si" "" "" | |
93 | } | |
94 | ||
95 | incr count -1 | |
96 | # Registers contents after each backward single step. | |
97 | for {set i $count} {$i >= 0} {incr i -1} { | |
98 | gdb_test "reverse-stepi" "" "" | |
99 | set post_regs($i) [capture_command_output "info all-registers" ""] | |
100 | } | |
101 | ||
102 | # Compare the register contents. | |
103 | for {set i 0} {$i < $count} {incr i} { | |
104 | if { ![gdb_assert { [string compare $pre_regs($i) $post_regs($i)] == 0 } \ | |
105 | "compare registers on insn $i:$insn_array($i)"] } { | |
106 | ||
107 | foreach pre_line [split $pre_regs($i) \n] post_line [split $post_regs($i) \n] { | |
108 | if { [string compare $pre_line $post_line] } { | |
109 | verbose -log " -:$pre_line" | |
110 | verbose -log " +:$post_line" | |
111 | } | |
112 | } | |
113 | } | |
114 | } | |
115 | gdb_test "record stop" | |
116 | } | |
117 | } | |
118 | ||
3263bceb YQ |
119 | set n_testcases [get_integer_valueof "n_testcases" 0] |
120 | ||
121 | if { ${n_testcases} == 0 } { | |
bc6c7af4 | 122 | untested "no test" |
3263bceb YQ |
123 | return 1 |
124 | } | |
125 | ||
126 | for { set i 0 } { ${i} < ${n_testcases} } { incr i } { | |
127 | set testcase [read_testcase $i] | |
128 | ||
129 | test $testcase | |
130 | } |