1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 1997, 1998, 1999, 2000, 2002, 2001, 2003, 2004, 2007, 2008, 2009
4 # Free Software Foundation, Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 # step-test.exp -- Expect script to test stepping in gdb
24 set testfile step-test
25 set srcfile ${testfile}.c
26 set binfile ${objdir}/${subdir}/${testfile}
28 remote_exec build "rm -f ${binfile}"
29 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
30 untested step-test.exp
36 gdb_reinitialize_dir $srcdir/$subdir
39 if ![runto_main] then {
40 fail "Can't run to main"
44 # Set a breakpoint at line 45, if stepi then finish fails, we would
45 # run to the end of the program, which would mess up the rest of the tests.
49 gdb_test "next" ".*${decimal}.*x = 1;.*" "next 1"
50 gdb_test "step" ".*${decimal}.*y = 2;.*" "step 1"
54 gdb_test "next 2" ".*${decimal}.*w = w.*2;.*" "next 2"
55 gdb_test "step 3" ".*${decimal}.*z = z.*5;.*" "step 3"
56 gdb_test "next" ".*${decimal}.*callee.*OVER.*" "next 3"
60 gdb_test "next" ".*${decimal}.*callee.*INTO.*" "next over"
64 gdb_test "step" ".*${decimal}.*myglob.*" "step into"
68 # I wonder if this is really portable. Are there any caller-saves
69 # platforms, on which `finish' will return you to some kind of pop
70 # instruction, which is attributed to the line containing the function
73 # On PA64, we end up at a different instruction than PA32.
74 # On IA-64, we also end up on callee instead of on the next line due
75 # to the restoration of the global pointer (which is a caller-save).
76 # Similarly on MIPS PIC targets.
78 if { [istarget "hppa2.0w-hp-hpux*"] || [istarget "ia64-*-*"] || [istarget "mips*-*-*"]} {
79 gdb_test_multiple "finish" "$test" {
80 -re ".*${decimal}.*a.*5.*= a.*3.*$gdb_prompt $" {
83 -re ".*${decimal}.*callee.*INTO.*$gdb_prompt $" {
88 gdb_test "finish" ".*${decimal}.*a.*5.*= a.*3.*" "step out"
91 ### Testing nexti and stepi.
93 ### test_i NAME COMMAND HERE THERE
95 ### Send COMMAND to gdb over and over, while the output matches the
96 ### regexp HERE, followed by the gdb prompt. Pass if the output
97 ### eventually matches the regexp THERE, followed by the gdb prompt;
98 ### fail if we have to iterate more than a hundred times, we time out
99 ### talking to gdb, or we get output which is neither HERE nor THERE. :)
101 ### Use NAME as the name of the test.
103 ### The exact regexps used are "$HERE.*$gdb_prompt $"
104 ### and "$THERE.*$gdb_prompt $"
106 proc test_i {name command here there} {
110 gdb_test_multiple "$command" "$name" {
111 -re "$here.*$gdb_prompt $" {
112 # Have we gone for too many steps without seeing any progress?
113 if {[incr i] >= 100} {
114 fail "$name (no progress after 100 steps)"
117 send_gdb "$command\n"
120 -re "$there.*$gdb_prompt $" {
121 # We've reached the next line. Rah.
128 test_i "stepi to next line" "stepi" \
129 ".*${decimal}.*a.*5.* = a.*3" \
130 ".*${decimal}.*callee.*STEPI"
132 # Continue to step until we enter the function. Also keep stepping
133 # if this passes through a (useless) PLT entry.
134 test_i "stepi into function" "stepi" \
135 "(.*${decimal}.*callee.*STEPI|.* in callee@plt)" \
136 ".*callee \\(\\) at .*step-test\\.c"
138 # Continue to step until we reach the function's body. This makes it
139 # more likely that we've actually completed the prologue, so "finish"
141 test_i "stepi into function's first source line" "stepi" \
142 ".*${decimal}.*int callee" \
143 ".*${decimal}.*myglob.*; return 0;"
145 # Have to be careful here, if the finish does not work,
146 # then we may run to the end of the program, which
147 # will cause erroneous failures in the rest of the tests
148 set test "stepi: finish call"
149 gdb_test_multiple "finish" "$test" {
150 -re ".*${decimal}.*callee.*NEXTI.*$gdb_prompt $" {
153 -re ".*(Program received|Program exited).*$gdb_prompt $" {
154 # Oops... We ran to the end of the program... Better reset
155 if {![runto_main]} then {
156 fail "$test (Can't run to main)"
159 if {![runto step-test.c:45]} {
160 fail "$test (Can't run to line 45)"
165 -re ".*${decimal}.*callee.*STEPI.*$gdb_prompt $" {
166 # On PA64, we end up at a different instruction than PA32.
167 # On IA-64, we end up on callee instead of on the following line due
168 # to the restoration of the global pointer.
169 # Similarly on MIPS PIC targets.
170 if { [istarget "hppa2.0w-hp-hpux*"] || [istarget "ia64-*-*"] || [istarget "mips*-*-*"] } {
171 test_i "$test" "stepi" \
172 ".*${decimal}.*callee.*STEPI" ".*${decimal}.*callee.*NEXTI"
179 test_i "nexti over function" "nexti" \
180 ".*${decimal}.*callee.*NEXTI" \
181 ".*${decimal}.*y = w \\+ z;"
183 # On some platforms, if we try to step into a function call that
184 # passes a large structure by value, then we actually end up stepping
185 # into memcpy, bcopy, or some such --- GCC emits the call to pass the
186 # argument. Opinion is bitterly divided about whether this is the
187 # right behavior for GDB or not, but we'll catch it here, so folks
188 # won't forget about it.
189 # Update 4/4/2002 - Regardless of which opinion you have, you would
190 # probably have to agree that gdb is currently behaving as designed,
191 # in the absence of additional code to not stop in functions used
192 # internally by the compiler. Since the testsuite should be checking
193 # for conformance to the design, the correct behavior is to accept the
194 # cases where gdb stops in memcpy/bcopy.
197 "break [gdb_get_line_number "step-test.exp: large struct by value"]" \
198 ".*Breakpoint.* at .*" \
199 "set breakpoint at call to large_struct_by_value"
200 gdb_test "continue" \
201 ".*Breakpoint ${decimal},.*large_struct_by_value.*" \
202 "run to pass large struct"
203 set test "large struct by value"
204 gdb_test_multiple "step" "$test" {
205 -re ".*step-test.exp: arrive here 1.*$gdb_prompt $" {
208 -re ".*(memcpy|bcopy).*$gdb_prompt $" {
209 send_gdb "finish\n" ; gdb_expect -re "$gdb_prompt $"
215 gdb_continue_to_end "step-test.exp"