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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [gdb/] [testsuite/] [gdb.base/] [structs.exp] - Blame information for rev 816

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1 227 jeremybenn 
# This testcase is part of GDB, the GNU debugger.
2 
 
3 
# Copyright 1996, 1997, 1999, 2003, 2004, 2007, 2008, 2009, 2010
4 
# Free Software Foundation, Inc.
5 
 
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.
10 
#
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.
15 
#
16 
# You should have received a copy of the GNU General Public License
17 
# along with this program.  If not, see .
18 
 
19 
if $tracelevel then {
20 
        strace $tracelevel
21 
}
22 
 
23 
set prms_id 0
24 
set bug_id 0
25 
 
26 
# Some targets can't call functions, so don't even bother with this
27 
# test.
28 
 
29 
if [target_info exists gdb,cannot_call_functions] {
30 
    setup_xfail "*-*-*"
31 
    fail "This target can not call functions"
32 
    continue
33 
}
34 
 
35 
set testfile "structs"
36 
set srcfile ${testfile}.c
37 
set binfile ${objdir}/${subdir}/${testfile}
38 
 
39 
# Regex matching any value of `char' type like: a = 65 'A'
40 
set anychar_re {-?[0-9]{1,3} '(.|\\([0-7]{3}|[a-z]|\\|'))'}
41 
 
42 
# Create and source the file that provides information about the
43 
# compiler used to compile the test case.
44 
 
45 
if [get_compiler_info ${binfile}] {
46 
    return -1;
47 
}
48 
 
49 
# Compile a variant of structs.c using TYPES to specify the type of
50 
# the first N struct elements (the remaining elements take the type of
51 
# the last TYPES field).  Run the compmiled program up to "main".
52 
# Also updates the global "testfile" to reflect the most recent build.
53 
 
54 
set first 1
55 
proc start_structs_test { types } {
56 
    global testfile
57 
    global srcfile
58 
    global binfile
59 
    global objdir
60 
    global subdir
61 
    global srcdir
62 
    global gdb_prompt
63 
    global anychar_re
64 
    global first
65 
 
66 
    # Create the additional flags
67 
    set flags "debug"
68 
    set testfile "structs"
69 
    set n 0
70 
    for {set n 0} {$n<[llength ${types}]} {incr n} {
71 
        set m [I2A ${n}]
72 
        set t [lindex ${types} $n]
73 
        lappend flags "additional_flags=-Dt${m}=${t}"
74 
        append testfile "-" "$t"
75 
    }
76 
 
77 
    set binfile ${objdir}/${subdir}/${testfile}
78 
    if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "${flags}"] != "" } {
79 
        # built the second test case since we can't use prototypes
80 
        warning "Prototypes not supported, rebuilding with -DNO_PROTOTYPES"
81 
        if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "${flags} additional_flags=-DNO_PROTOTYPES"] != "" } {
82 
            untested structs.exp
83 
            return -1
84 
        }
85 
    }
86 
 
87 
    # Start with a fresh gdb.
88 
    gdb_exit
89 
    gdb_start
90 
    gdb_reinitialize_dir $srcdir/$subdir
91 
    gdb_load ${binfile}
92 
 
93 
    # Make certain that the output is consistent
94 
    gdb_test "set print sevenbit-strings" "" \
95 
            "set print sevenbit-strings; ${testfile}"
96 
    gdb_test "set print address off" "" \
97 
            "set print address off; ${testfile}"
98 
    gdb_test "set width 0" "" \
99 
            "set width 0; ${testfile}"
100 
    gdb_test "set print elements 300" "" \
101 
            "set print elements 300; ${testfile}"
102 
 
103 
    # Advance to main
104 
    if { ![runto_main] } then {
105 
        gdb_suppress_tests;
106 
    }
107 
 
108 
    # Get the debug format
109 
    get_debug_format
110 
 
111 
    # Limit the slow $anychar_re{256} matching for better performance.
112 
    if $first {
113 
        set first 0
114 
 
115 
        # Verify $anychar_re can match all the values of `char' type.
116 
        gdb_breakpoint [gdb_get_line_number "chartest-done"]
117 
        gdb_continue_to_breakpoint "chartest-done" ".*chartest-done.*"
118 
        gdb_test "p chartest" "= {({c = ${anychar_re}}, ){255}{c = ${anychar_re}}}"
119 
    }
120 
 
121 
    # check that at the struct containing all the relevant types is correct
122 
    set foo_t "type = struct struct[llength ${types}] \{"
123 
    for {set n 0} {$n<[llength ${types}]} {incr n} {
124 
        append foo_t "\[\r\n \]+[lindex ${types} $n] [i2a $n];"
125 
    }
126 
    append foo_t "\[\r\n \]+\}"
127 
    gdb_test "ptype foo[llength ${types}]" "${foo_t}" \
128 
            "ptype foo[llength ${types}]; ${testfile}"
129 
}
130 
 
131 
# The expected value for fun${n}, L${n} and foo${n}.  First element is
132 
# empty to make indexing easier.  "foo" returns the modified value,
133 
# "zed" returns the invalid value.
134 
 
135 
proc foo { n } {
136 
    return [lindex {
137 
        "{}"
138 
        "{a = 49 '1'}"
139 
        "{a = 97 'a', b = 50 '2'}"
140 
        "{a = 49 '1', b = 98 'b', c = 51 '3'}"
141 
        "{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4'}"
142 
        "{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5'}"
143 
        "{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6'}"
144 
        "{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7'}"
145 
        "{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8'}"
146 
        "{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9'}"
147 
        "{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A'}"
148 
        "{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B'}"
149 
        "{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A', k = 107 'k', l = 67 'C'}"
150 
        "{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B', l = 108 'l', m = 68 'D'}"
151 
        "{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A', k = 107 'k', l = 67 'C', m = 109 'm', n = 69 'E'}"
152 
        "{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B', l = 108 'l', m = 68 'D', n = 110 'n', o = 70 'F'}"
153 
        "{a = 97 'a', b = 50 '2', c = 99 'c', d = 52 '4', e = 101 'e', f = 54 '6', g = 103 'g', h = 56 '8', i = 105 'i', j = 65 'A', k = 107 'k', l = 67 'C', m = 109 'm', n = 69 'E', o = 111 'o', p = 71 'G'}"
154 
        "{a = 49 '1', b = 98 'b', c = 51 '3', d = 100 'd', e = 53 '5', f = 102 'f', g = 55 '7', h = 104 'h', i = 57 '9', j = 106 'j', k = 66 'B', l = 108 'l', m = 68 'D', n = 110 'n', o = 70 'F', p = 112 'p', q = 72 'H'}"
155 
    } $n]
156 
}
157 
 
158 
proc zed { n } {
159 
    return [lindex {
160 
        "{}"
161 
        "{a = 90 'Z'}"
162 
        "{a = 90 'Z', b = 90 'Z'}"
163 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z'}"
164 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z'}"
165 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z'}"
166 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z'}"
167 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z'}"
168 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z'}"
169 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z'}"
170 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z'}"
171 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z'}"
172 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z'}"
173 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z'}"
174 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z'}"
175 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z', o = 90 'Z'}"
176 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z', o = 90 'Z', p = 90 'Z'}"
177 
        "{a = 90 'Z', b = 90 'Z', c = 90 'Z', d = 90 'Z', e = 90 'Z', f = 90 'Z', g = 90 'Z', h = 90 'Z', i = 90 'Z', j = 90 'Z', k = 90 'Z', l = 90 'Z', m = 90 'Z', n = 90 'Z', o = 90 'Z', p = 90 'Z', q = 90 'Z'}"
178 
    } $n]
179 
}
180 
 
181 
proc any { n } {
182 
    global anychar_re
183 
    set ac $anychar_re
184 
    return [lindex [list \
185 
        "{}" \
186 
        "{a = ${ac}}" \
187 
        "{a = ${ac}, b = ${ac}}" \
188 
        "{a = ${ac}, b = ${ac}, c = ${ac}}" \
189 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}}" \
190 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}}" \
191 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}}" \
192 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}}" \
193 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}}" \
194 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}}" \
195 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}}" \
196 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}, k = ${ac}}" \
197 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}, k = ${ac}, l = ${ac}}" \
198 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}, k = ${ac}, l = ${ac}, m = ${ac}}" \
199 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}, k = ${ac}, l = ${ac}, m = ${ac}, n = ${ac}}" \
200 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}, k = ${ac}, l = ${ac}, m = ${ac}, n = ${ac}, o = ${ac}}" \
201 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}, k = ${ac}, l = ${ac}, m = ${ac}, n = ${ac}, o = ${ac}, p = ${ac}}" \
202 
        "{a = ${ac}, b = ${ac}, c = ${ac}, d = ${ac}, e = ${ac}, f = ${ac}, g = ${ac}, h = ${ac}, i = ${ac}, j = ${ac}, k = ${ac}, l = ${ac}, m = ${ac}, n = ${ac}, o = ${ac}, p = ${ac}, q = ${ac}}" \
203 
    ] $n]
204 
}
205 
 
206 
# Given N (0..25), return the corresponding alphabetic letter in lower
207 
# or upper case.  This is ment to be i18n proof.
208 
 
209 
proc i2a { n } {
210 
    return [string range "abcdefghijklmnopqrstuvwxyz" $n $n]
211 
}
212 
 
213 
proc I2A { n } {
214 
    return [string toupper [i2a $n]]
215 
}
216 
 
217 
 
218 
# Use the file name, compiler and tuples to set up any needed KFAILs.
219 
 
220 
proc setup_kfails { file tuples bug } {
221 
    global testfile
222 
    if [string match $file $testfile] {
223 
        foreach f $tuples { setup_kfail $f $bug }
224 
    }
225 
}
226 
 
227 
proc setup_compiler_kfails { file compiler format tuples bug } {
228 
    global testfile
229 
    if {[string match $file $testfile] && [test_compiler_info $compiler]  && [test_debug_format $format]} {
230 
        foreach f $tuples { setup_kfail $f $bug }
231 
    }
232 
}
233 
 
234 
# Test GDB's ability to make inferior function calls to functions
235 
# returning (or passing in a single structs.
236 
 
237 
# N identifies the number of elements in the struct that will be used
238 
# for the test case.  FAILS is a list of target tuples that will fail
239 
# this test.
240 
 
241 
#  start_structs_test() will have previously built a program with a
242 
# specified combination of types for those elements.  To ensure
243 
# robustness of the output, "p/c" is used.
244 
 
245 
# This tests the code paths "which return-value convention?" and
246 
# "extract return-value from registers" called by "infcall.c".
247 
 
248 
proc test_struct_calls { n } {
249 
    global testfile
250 
    global gdb_prompt
251 
 
252 
    # Check that GDB can always extract a struct-return value from an
253 
    # inferior function call.  Since GDB always knows the location of an
254 
    # inferior function call's return value these should never fail
255 
 
256 
    # Implemented by calling the parameterless function "fun$N" and then
257 
    # examining the return value printed by GDB.
258 
 
259 
    set tests "call $n ${testfile}"
260 
 
261 
    # Call fun${n}, checking the printed return-value.
262 
    setup_compiler_kfails structs-tc-tll gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
263 
    setup_compiler_kfails structs-tc-td gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
264 
    gdb_test "p/c fun${n}()"  "[foo ${n}]" "p/c fun(); ${tests}"
265 
 
266 
    # Check that GDB can always pass a structure to an inferior function.
267 
    # This test can never fail.
268 
 
269 
    # Implemented by calling the one parameter function "Fun$N" which
270 
    # stores its parameter in the global variable "L$N".  GDB then
271 
    # examining that global to confirm that the value is as expected.
272 
 
273 
    gdb_test "call Fun${n}(foo${n})" "" "call Fun(foo); ${tests}"
274 
    setup_compiler_kfails structs-tc-tll gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
275 
    setup_compiler_kfails structs-tc-td gcc-3-3-* "DWARF 2" i*86-*-* gdb/1455
276 
    gdb_test "p/c L${n}" [foo ${n}] "p/c L; ${tests}"
277 
}
278 
 
279 
# Test GDB's ability to both return a function (with "return" or
280 
# "finish") and correctly extract/store any corresponding
281 
# return-value.
282 
 
283 
# Check that GDB can consistently extract/store structure return
284 
# values.  There are two cases - returned in registers and returned in
285 
# memory.  For the latter case, the return value can't be found and a
286 
# failure is "expected".  However GDB must still both return the
287 
# function and display the final source and line information.
288 
 
289 
# N identifies the number of elements in the struct that will be used
290 
# for the test case.  FAILS is a list of target tuples that will fail
291 
# this test.
292 
 
293 
# This tests the code paths "which return-value convention?", "extract
294 
# return-value from registers", and "store return-value in registers".
295 
# Unlike "test struct calls", this test is expected to "fail" when the
296 
# return-value is in memory (GDB can't find the location).  The test
297 
# is in three parts: test "return"; test "finish"; check that the two
298 
# are consistent.  GDB can sometimes work for one command and not the
299 
# other.
300 
 
301 
proc test_struct_returns { n } {
302 
    global gdb_prompt
303 
    global testfile
304 
 
305 
    set tests "return $n ${testfile}"
306 
 
307 
 
308 
    # Check that "return" works.
309 
 
310 
    # GDB must always force the return of a function that has
311 
    # a struct result.  Dependant on the ABI, it may, or may not be
312 
    # possible to store the return value in a register.
313 
 
314 
    # The relevant code looks like "L{n} = fun{n}()".  The test forces
315 
    # "fun{n}" to "return" with an explicit value.  Since that code
316 
    # snippet will store the the returned value in "L{n}" the return
317 
    # is tested by examining "L{n}".  This assumes that the
318 
    # compiler implemented this as fun{n}(&L{n}) and hence that when
319 
    # the value isn't stored "L{n}" remains unchanged.  Also check for
320 
    # consistency between this and the "finish" case.
321 
 
322 
    # Get into a call of fun${n}
323 
    gdb_test "advance fun${n}" \
324 
            "fun${n} .*\[\r\n\]+\[0-9\].*return foo${n}.*" \
325 
            "advance to fun for return; ${tests}"
326 
 
327 
    # Check that the program invalidated the relevant global.
328 
    gdb_test "p/c L${n}" " = [zed $n]" "zed L for return; ${tests}"
329 
 
330 
    # Force the "return".  This checks that the return is always
331 
    # performed, and that GDB correctly reported this to the user.
332 
    # GDB 6.0 and earlier, when the return-value's location wasn't
333 
    # known, both failed to print a final "source and line" and misplaced
334 
    # the frame ("No frame").
335 
 
336 
    # The test is writen so that it only reports one FAIL/PASS for the
337 
    # entire operation.  The value returned is checked further down.
338 
    # "return_value_known", if non-zero, indicates that GDB knew where
339 
    # the return value was located.
340 
 
341 
    set test "return foo; ${tests}"
342 
    set return_value_known 1
343 
    set return_value_unimplemented 0
344 
    gdb_test_multiple "return foo${n}" "${test}" {
345 
        -re "The location" {
346 
            # Ulgh, a struct return, remember this (still need prompt).
347 
            set return_value_known 0
348 
            exp_continue
349 
        }
350 
        -re "A structure or union" {
351 
            # Ulgh, a struct return, remember this (still need prompt).
352 
            set return_value_known 0
353 
            # Double ulgh.  Architecture doesn't use return_value and
354 
            # hence hasn't implemented small structure return.
355 
            set return_value_unimplemented 1
356 
            exp_continue
357 
        }
358 
        -re "Make fun${n} return now.*y or n. $" {
359 
            gdb_test_multiple "y" "${test}" {
360 
                -re "L${n} *= fun${n}.*${gdb_prompt} $" {
361 
                    # Need to step off the function call
362 
                    gdb_test "next" "L.* *= fun.*" "${test}"
363 
                }
364 
                -re "L[expr ${n} + 1] *= fun[expr ${n} + 1].*${gdb_prompt} $" {
365 
                    pass "${test}"
366 
                }
367 
            }
368 
        }
369 
    }
370 
 
371 
    # Check that the return-value is as expected.  At this stage we're
372 
    # just checking that GDB has returned a value consistent with
373 
    # "return_value_known" set above.
374 
    #
375 
    # Note that, when return_value_known is false, we can't make any
376 
    # assumptions at all about the value L:
377 
    #
378 
    # - If the caller passed the address of L directly as fun's
379 
    #   return value buffer, then L will be unchanged, because we
380 
    #   forced fun to return before it could store anything in it.
381 
    #
382 
    # - If the caller passed the address of some temporary buffer to
383 
    #   fun, and then copied the buffer into L, then L will
384 
    #   have been overwritten with whatever garbage was in the
385 
    #   uninitialized buffer.
386 
    #
387 
    # - However, if the temporary buffer just happened to have the
388 
    #   "right" value of foo in it, then L will, in fact, have
389 
    #   the value you'd expect to see if the 'return' had worked!
390 
    #   This has actually been observed to happen on the Renesas M32C.
391 
    #
392 
    # So, really, anything is acceptable unless return_value_known is
393 
    # true.
394 
 
395 
    set test "value foo returned; ${tests}"
396 
    gdb_test_multiple "p/c L${n}" "${test}" {
397 
        -re " = [foo ${n}].*${gdb_prompt} $" {
398 
            # This answer is okay regardless of whether GDB claims to
399 
            # have set the return value: if it did, then this is what
400 
            # we expected; and if it didn't, then any answer is okay.
401 
            pass "${test}"
402 
        }
403 
        -re " = [any $n].*${gdb_prompt} $" {
404 
            if $return_value_known {
405 
                # This contradicts the above claim that GDB knew
406 
                # the location of the return value.
407 
                fail "${test}"
408 
            } else {
409 
                # We expected L${n} to be set to garbage, so any
410 
                # answer is acceptable.
411 
                pass "${test}"
412 
            }
413 
        }
414 
        -re ".*${gdb_prompt} $" {
415 
            if $return_value_unimplemented {
416 
                # What a suprize.  The architecture hasn't implemented
417 
                # return_value, and hence has to fail.
418 
                kfail "$test" gdb/1444
419 
            } else {
420 
                fail "$test"
421 
            }
422 
        }
423 
    }
424 
 
425 
    # Check that a "finish" works.
426 
 
427 
    # This is almost but not quite the same as "call struct funcs".
428 
    # Architectures can have subtle differences in the two code paths.
429 
 
430 
    # The relevant code snippet is "L{n} = fun{n}()".  The program is
431 
    # advanced into a call to  "fun{n}" and then that function is
432 
    # finished.  The returned value that GDB prints, reformatted using
433 
    # "p/c", is checked.
434 
 
435 
    # Get into "fun${n}()".
436 
    gdb_test "advance fun${n}" \
437 
            "fun${n} .*\[\r\n\]+\[0-9\].*return foo${n}.*" \
438 
            "advance to fun for finish; ${tests}"
439 
 
440 
    # Check that the program invalidated the relevant global.
441 
    gdb_test "p/c L${n}" " = [zed $n]" "zed L for finish; ${tests}"
442 
 
443 
    # Finish the function, set 'finish_value_known" to non-empty if
444 
    # the return-value was found.
445 
 
446 
    set test "finish foo; ${tests}"
447 
    set finish_value_known 1
448 
    gdb_test_multiple "finish" "${test}" {
449 
        -re "Value returned is .*${gdb_prompt} $" {
450 
            pass "${test}"
451 
        }
452 
        -re "Cannot determine contents.*${gdb_prompt} $" {
453 
            # Expected bad value.  For the moment this is ok.
454 
            set finish_value_known 0
455 
            pass "${test}"
456 
        }
457 
    }
458 
 
459 
    # Re-print the last (return-value) using the more robust
460 
    # "p/c".  If no return value was found, the 'Z' from the previous
461 
    # check that the variable was cleared, is printed.
462 
    set test "value foo finished; ${tests}"
463 
    gdb_test_multiple "p/c" "${test}" {
464 
        -re "[foo ${n}]\[\r\n\]+${gdb_prompt} $" {
465 
            if $finish_value_known {
466 
                pass "${test}"
467 
            } else {
468 
                # This contradicts the above claim that GDB didn't
469 
                # know the location of the return-value.
470 
                fail "${test}"
471 
            }
472 
        }
473 
        -re "[zed ${n}]\[\r\n\]+${gdb_prompt} $" {
474 
            # The value didn't get found.  This is "expected".
475 
            if $finish_value_known {
476 
                # This contradicts the above claim that GDB did
477 
                # know the location of the return-value.
478 
                fail "${test}"
479 
            } else {
480 
                pass "${test}"
481 
            }
482 
        }
483 
    }
484 
 
485 
    # Finally, check that "return" and finish" have consistent
486 
    # behavior.
487 
 
488 
    # Since "finish" works in more cases than "return" (see
489 
    # RETURN_VALUE_ABI_RETURNS_ADDRESS and
490 
    # RETURN_VALUE_ABI_PRESERVES_ADDRESS), the "return" value being
491 
    # known implies that the "finish" value is known (but not the
492 
    # reverse).
493 
 
494 
    set test "return value known implies finish value known; ${tests}"
495 
    if {$return_value_known && ! $finish_value_known} {
496 
        kfail gdb/1444 "${test}"
497 
    } else {
498 
        pass "${test}"
499 
    }
500 
}
501 
 
502 
# ABIs pass anything >8 or >16 bytes in memory but below that things
503 
# randomly use register and/and structure conventions.  Check all
504 
# possible sized char structs in that range.  But only a restricted
505 
# range of the other types.
506 
 
507 
# NetBSD/PPC returns "unnatural" (3, 5, 6, 7) sized structs in memory.
508 
 
509 
# d10v is weird. 5/6 byte structs go in memory.  2 or more char
510 
# structs go in memory.  Everything else is in a register!
511 
 
512 
# Test every single char struct from 1..17 in size.  This is what the
513 
# original "structs" test was doing.
514 
 
515 
start_structs_test { tc }
516 
test_struct_calls 1
517 
test_struct_calls 2
518 
test_struct_calls 3
519 
test_struct_calls 4
520 
test_struct_calls 5
521 
test_struct_calls 6
522 
test_struct_calls 7
523 
test_struct_calls 8
524 
test_struct_calls 9
525 
test_struct_calls 10
526 
test_struct_calls 11
527 
test_struct_calls 12
528 
test_struct_calls 13
529 
test_struct_calls 14
530 
test_struct_calls 15
531 
test_struct_calls 16
532 
test_struct_calls 17
533 
test_struct_returns 1
534 
test_struct_returns 2
535 
test_struct_returns 3
536 
test_struct_returns 4
537 
test_struct_returns 5
538 
test_struct_returns 6
539 
test_struct_returns 7
540 
test_struct_returns 8
541 
 
542 
 
543 
# Let the fun begin.
544 
 
545 
# Assuming that any integer struct larger than 8 bytes goes in memory,
546 
# come up with many and varied combinations of a return struct.  For
547 
# "struct calls" test just beyond that 8 byte boundary, for "struct
548 
# returns" test up to that boundary.
549 
 
550 
# For floats, assumed that up to two struct elements can be stored in
551 
# floating point registers, regardless of their size.
552 
 
553 
# The approx size of each structure it is computed assumed that tc=1,
554 
# ts=2, ti=4, tl=4, tll=8, tf=4, td=8, tld=16, and that all fields are
555 
# naturally aligned.  Padding being added where needed.  Note that
556 
# these numbers are just approx, the d10v has ti=2, a 64-bit has has
557 
# tl=8.
558 
 
559 
# Approx size: 2, 4, ...
560 
start_structs_test { ts }
561 
test_struct_calls 1
562 
test_struct_calls 2
563 
test_struct_calls 3
564 
test_struct_calls 4
565 
test_struct_calls 5
566 
test_struct_returns 1
567 
test_struct_returns 2
568 
test_struct_returns 3
569 
test_struct_returns 4
570 
 
571 
# Approx size: 4, 8, ...
572 
start_structs_test { ti }
573 
test_struct_calls 1
574 
test_struct_calls 2
575 
test_struct_calls 3
576 
test_struct_returns 1
577 
test_struct_returns 2
578 
 
579 
# Approx size: 4, 8, ...
580 
start_structs_test { tl }
581 
test_struct_calls 1
582 
test_struct_calls 2
583 
test_struct_calls 3
584 
test_struct_returns 1
585 
test_struct_returns 2
586 
 
587 
# Approx size: 8, 16, ...
588 
start_structs_test { tll }
589 
test_struct_calls 1
590 
test_struct_calls 2
591 
test_struct_returns 1
592 
 
593 
# Approx size: 4, 8, ...
594 
start_structs_test { tf }
595 
test_struct_calls 1
596 
test_struct_calls 2
597 
test_struct_calls 3
598 
test_struct_returns 1
599 
test_struct_returns 2
600 
 
601 
# Approx size: 8, 16, ...
602 
start_structs_test { td }
603 
test_struct_calls 1
604 
test_struct_calls 2
605 
test_struct_returns 1
606 
 
607 
# Approx size: 16, 32, ...
608 
start_structs_test { tld }
609 
test_struct_calls 1
610 
test_struct_calls 2
611 
test_struct_returns 1
612 
 
613 
# Approx size: 2+1=3, 4, ...
614 
start_structs_test { ts tc }
615 
test_struct_calls 2
616 
test_struct_calls 3
617 
test_struct_calls 4
618 
test_struct_calls 5
619 
test_struct_calls 6
620 
test_struct_calls 7
621 
test_struct_calls 8
622 
test_struct_returns 2
623 
 
624 
# Approx size: 4+1=5, 6, ...
625 
start_structs_test { ti tc }
626 
test_struct_calls 2
627 
test_struct_calls 3
628 
test_struct_calls 4
629 
test_struct_calls 5
630 
test_struct_calls 6
631 
test_struct_returns 2
632 
 
633 
# Approx size: 4+1=5, 6, ...
634 
start_structs_test { tl tc }
635 
test_struct_calls 2
636 
test_struct_calls 3
637 
test_struct_calls 4
638 
test_struct_calls 5
639 
test_struct_calls 6
640 
test_struct_returns 2
641 
 
642 
# Approx size: 8+1=9, 10, ...
643 
start_structs_test { tll tc }
644 
test_struct_calls 2
645 
 
646 
# Approx size: 4+1=5, 6, ...
647 
start_structs_test { tf tc }
648 
test_struct_calls 2
649 
test_struct_calls 3
650 
test_struct_calls 4
651 
test_struct_calls 5
652 
test_struct_calls 6
653 
test_struct_returns 2
654 
 
655 
# Approx size: 8+1=9, 10, ...
656 
start_structs_test { td tc }
657 
test_struct_calls 2
658 
 
659 
# Approx size: 16+1=17, 18, ...
660 
start_structs_test { tld tc }
661 
test_struct_calls 2
662 
 
663 
# Approx size: (1+1)+2=4, 6, ...
664 
start_structs_test { tc ts }
665 
test_struct_calls 2
666 
test_struct_calls 3
667 
test_struct_calls 4
668 
test_struct_calls 5
669 
test_struct_calls 6
670 
test_struct_returns 2
671 
 
672 
# Approx size: (1+3)+4=8, 12, ...
673 
start_structs_test { tc ti }
674 
test_struct_calls 2
675 
test_struct_calls 3
676 
test_struct_calls 4
677 
test_struct_returns 2
678 
 
679 
# Approx size: (1+3)+4=8, 12, ...
680 
start_structs_test { tc tl }
681 
test_struct_calls 2
682 
test_struct_calls 3
683 
test_struct_calls 4
684 
test_struct_returns 2
685 
 
686 
# Approx size: (1+7)+8=16, 24, ...
687 
start_structs_test { tc tll }
688 
test_struct_calls 2
689 
 
690 
# Approx size: (1+3)+4=8, 12, ...
691 
start_structs_test { tc tf }
692 
test_struct_calls 2
693 
test_struct_calls 3
694 
test_struct_calls 4
695 
 
696 
# Approx size: (1+7)+8=16, 24, ...
697 
start_structs_test { tc td }
698 
test_struct_calls 2
699 
 
700 
# Approx size: (1+15)+16=32, 48, ...
701 
start_structs_test { tc tld }
702 
test_struct_calls 2
703 
 
704 
# Some float combinations
705 
 
706 
# Approx size: 8+4=12, 16, ...
707 
# d10v: 4+4=8, 12, ...
708 
start_structs_test { td tf }
709 
test_struct_calls 2
710 
test_struct_returns 2
711 
 
712 
# Approx size: (4+4)+8=16, 32, ...
713 
# d10v: 4+4=8, 12, ...
714 
start_structs_test { tf td }
715 
test_struct_calls 2
716 
test_struct_returns 2
717 
 
718 
return 0

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