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c4ffd4c0 AC |
1 | # This testcase is part of GDB, the GNU debugger. |
2 | ||
e2882c85 | 3 | # Copyright 1997-2018 Free Software Foundation, Inc. |
c906108c SS |
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 | |
e22f8b7c | 7 | # the Free Software Foundation; either version 3 of the License, or |
c906108c | 8 | # (at your option) any later version. |
e22f8b7c | 9 | # |
c906108c SS |
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. | |
e22f8b7c | 14 | # |
c906108c | 15 | # You should have received a copy of the GNU General Public License |
e22f8b7c | 16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
17 | # step-test.exp -- Expect script to test stepping in gdb |
18 | ||
0ab77f5f | 19 | standard_testfile .c |
c906108c SS |
20 | |
21 | remote_exec build "rm -f ${binfile}" | |
f2dd3617 | 22 | if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { |
5b362f04 | 23 | untested "failed to compile" |
b60f0898 | 24 | return -1 |
c906108c SS |
25 | } |
26 | ||
0ab77f5f | 27 | clean_restart ${binfile} |
c906108c SS |
28 | |
29 | if ![runto_main] then { | |
bc6c7af4 | 30 | fail "can't run to main" |
c906108c SS |
31 | return 0 |
32 | } | |
33 | ||
7a292a7a SS |
34 | # Set a breakpoint at line 45, if stepi then finish fails, we would |
35 | # run to the end of the program, which would mess up the rest of the tests. | |
36 | ||
c906108c SS |
37 | # Vanilla step/next |
38 | # | |
39 | gdb_test "next" ".*${decimal}.*x = 1;.*" "next 1" | |
40 | gdb_test "step" ".*${decimal}.*y = 2;.*" "step 1" | |
41 | ||
42 | # With count | |
43 | # | |
44 | gdb_test "next 2" ".*${decimal}.*w = w.*2;.*" "next 2" | |
45 | gdb_test "step 3" ".*${decimal}.*z = z.*5;.*" "step 3" | |
46 | gdb_test "next" ".*${decimal}.*callee.*OVER.*" "next 3" | |
47 | ||
48 | # Step over call | |
49 | # | |
50 | gdb_test "next" ".*${decimal}.*callee.*INTO.*" "next over" | |
51 | ||
52 | # Step into call | |
53 | # | |
085dd6e6 | 54 | gdb_test "step" ".*${decimal}.*myglob.*" "step into" |
c906108c SS |
55 | |
56 | # Step out of call | |
57 | # | |
58 | # I wonder if this is really portable. Are there any caller-saves | |
59 | # platforms, on which `finish' will return you to some kind of pop | |
60 | # instruction, which is attributed to the line containing the function | |
61 | # call? | |
085dd6e6 | 62 | |
8216cda9 KB |
63 | # On PA64, we end up at a different instruction than PA32. |
64 | # On IA-64, we also end up on callee instead of on the next line due | |
65 | # to the restoration of the global pointer (which is a caller-save). | |
f4f00b1f | 66 | # Similarly on MIPS PIC targets. |
c4ffd4c0 | 67 | set test "step out" |
3ca22649 | 68 | if { [istarget "ia64-*-*"] || [istarget "mips*-*-*"]} { |
c4ffd4c0 AC |
69 | gdb_test_multiple "finish" "$test" { |
70 | -re ".*${decimal}.*a.*5.*= a.*3.*$gdb_prompt $" { | |
71 | pass "$test" | |
72 | } | |
73 | -re ".*${decimal}.*callee.*INTO.*$gdb_prompt $" { | |
74 | pass "$test" | |
75 | } | |
085dd6e6 JM |
76 | } |
77 | } else { | |
78 | gdb_test "finish" ".*${decimal}.*a.*5.*= a.*3.*" "step out" | |
79 | } | |
c906108c SS |
80 | |
81 | ### Testing nexti and stepi. | |
82 | ### | |
83 | ### test_i NAME COMMAND HERE THERE | |
84 | ### | |
85 | ### Send COMMAND to gdb over and over, while the output matches the | |
86 | ### regexp HERE, followed by the gdb prompt. Pass if the output | |
87 | ### eventually matches the regexp THERE, followed by the gdb prompt; | |
88 | ### fail if we have to iterate more than a hundred times, we time out | |
89 | ### talking to gdb, or we get output which is neither HERE nor THERE. :) | |
90 | ### | |
91 | ### Use NAME as the name of the test. | |
92 | ### | |
93 | ### The exact regexps used are "$HERE.*$gdb_prompt $" | |
94 | ### and "$THERE.*$gdb_prompt $" | |
95 | ### | |
96 | proc test_i {name command here there} { | |
97 | global gdb_prompt | |
98 | ||
99 | set i 0 | |
c4ffd4c0 AC |
100 | gdb_test_multiple "$command" "$name" { |
101 | -re "$here.*$gdb_prompt $" { | |
102 | # Have we gone for too many steps without seeing any progress? | |
103 | if {[incr i] >= 100} { | |
104 | fail "$name (no progress after 100 steps)" | |
c906108c SS |
105 | return |
106 | } | |
c4ffd4c0 AC |
107 | send_gdb "$command\n" |
108 | exp_continue | |
c906108c | 109 | } |
c4ffd4c0 AC |
110 | -re "$there.*$gdb_prompt $" { |
111 | # We've reached the next line. Rah. | |
112 | pass "$name" | |
c906108c SS |
113 | return |
114 | } | |
115 | } | |
116 | } | |
117 | ||
118 | test_i "stepi to next line" "stepi" \ | |
119 | ".*${decimal}.*a.*5.* = a.*3" \ | |
120 | ".*${decimal}.*callee.*STEPI" | |
bd5ddfe8 DJ |
121 | |
122 | # Continue to step until we enter the function. Also keep stepping | |
123 | # if this passes through a (useless) PLT entry. | |
c906108c | 124 | test_i "stepi into function" "stepi" \ |
bd5ddfe8 | 125 | "(.*${decimal}.*callee.*STEPI|.* in callee@plt)" \ |
7a292a7a | 126 | ".*callee \\(\\) at .*step-test\\.c" |
dfcd3bfb JM |
127 | |
128 | # Continue to step until we reach the function's body. This makes it | |
129 | # more likely that we've actually completed the prologue, so "finish" | |
130 | # will work. | |
131 | test_i "stepi into function's first source line" "stepi" \ | |
132 | ".*${decimal}.*int callee" \ | |
133 | ".*${decimal}.*myglob.*; return 0;" | |
134 | ||
7a292a7a SS |
135 | # Have to be careful here, if the finish does not work, |
136 | # then we may run to the end of the program, which | |
137 | # will cause erroneous failures in the rest of the tests | |
c4ffd4c0 AC |
138 | set test "stepi: finish call" |
139 | gdb_test_multiple "finish" "$test" { | |
140 | -re ".*${decimal}.*callee.*NEXTI.*$gdb_prompt $" { | |
141 | pass "$test" | |
7a292a7a | 142 | } |
fda326dd | 143 | -re ".*(Program received|$inferior_exited_re).*$gdb_prompt $" { |
c4ffd4c0 AC |
144 | # Oops... We ran to the end of the program... Better reset |
145 | if {![runto_main]} then { | |
146 | fail "$test (Can't run to main)" | |
147 | return 0 | |
148 | } | |
149 | if {![runto step-test.c:45]} { | |
150 | fail "$test (Can't run to line 45)" | |
151 | return 0 | |
152 | } | |
153 | fail "$test" | |
7a292a7a | 154 | } |
c4ffd4c0 AC |
155 | -re ".*${decimal}.*callee.*STEPI.*$gdb_prompt $" { |
156 | # On PA64, we end up at a different instruction than PA32. | |
157 | # On IA-64, we end up on callee instead of on the following line due | |
158 | # to the restoration of the global pointer. | |
159 | # Similarly on MIPS PIC targets. | |
3ca22649 | 160 | if { [istarget "ia64-*-*"] || [istarget "mips*-*-*"] } { |
c4ffd4c0 AC |
161 | test_i "$test" "stepi" \ |
162 | ".*${decimal}.*callee.*STEPI" ".*${decimal}.*callee.*NEXTI" | |
163 | } else { | |
164 | fail "$test" | |
165 | } | |
085dd6e6 | 166 | } |
7a292a7a SS |
167 | } |
168 | ||
c906108c SS |
169 | test_i "nexti over function" "nexti" \ |
170 | ".*${decimal}.*callee.*NEXTI" \ | |
171 | ".*${decimal}.*y = w \\+ z;" | |
172 | ||
173 | # On some platforms, if we try to step into a function call that | |
174 | # passes a large structure by value, then we actually end up stepping | |
175 | # into memcpy, bcopy, or some such --- GCC emits the call to pass the | |
176 | # argument. Opinion is bitterly divided about whether this is the | |
177 | # right behavior for GDB or not, but we'll catch it here, so folks | |
178 | # won't forget about it. | |
cd721503 FF |
179 | # Update 4/4/2002 - Regardless of which opinion you have, you would |
180 | # probably have to agree that gdb is currently behaving as designed, | |
181 | # in the absence of additional code to not stop in functions used | |
182 | # internally by the compiler. Since the testsuite should be checking | |
183 | # for conformance to the design, the correct behavior is to accept the | |
184 | # cases where gdb stops in memcpy/bcopy. | |
c906108c | 185 | |
c2d11a7d JM |
186 | gdb_test \ |
187 | "break [gdb_get_line_number "step-test.exp: large struct by value"]" \ | |
188 | ".*Breakpoint.* at .*" \ | |
189 | "set breakpoint at call to large_struct_by_value" | |
c906108c SS |
190 | gdb_test "continue" \ |
191 | ".*Breakpoint ${decimal},.*large_struct_by_value.*" \ | |
192 | "run to pass large struct" | |
c4ffd4c0 AC |
193 | set test "large struct by value" |
194 | gdb_test_multiple "step" "$test" { | |
05b4d525 | 195 | -re ".*step-test.exp: arrive here 1.*$gdb_prompt $" { |
c4ffd4c0 | 196 | pass "$test" |
05b4d525 FF |
197 | } |
198 | -re ".*(memcpy|bcopy).*$gdb_prompt $" { | |
199 | send_gdb "finish\n" ; gdb_expect -re "$gdb_prompt $" | |
200 | send_gdb "step\n" | |
201 | exp_continue | |
202 | } | |
05b4d525 | 203 | } |
c906108c | 204 | |
7a292a7a | 205 | gdb_continue_to_end "step-test.exp" |
c906108c SS |
206 | |
207 | return 0 |