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1 330 jeremybenn
# This test code is part of GDB, the GNU debugger.
2
 
3
# Copyright 2003, 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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 .
17
 
18
# Auxiliary function to check for known problems.
19
#
20
# EXPECTED_STRING is the string expected by the test.
21
#
22
# ACTUAL_STRING is the actual string output by gdb.
23
#
24
# ERRATA_TABLE is a list of lines of the form:
25
#
26
#  { expected-string broken-string {eval-block} }
27
#
28
# If there is a line for the given EXPECTED_STRING, and if the
29
# ACTUAL_STRING output by gdb is the same as the BROKEN_STRING in the
30
# table, then I eval the eval-block.
31
 
32
proc cp_check_errata { expected_string actual_string errata_table } {
33
    foreach erratum $errata_table {
34
        if { "$expected_string" == [lindex $erratum 0]
35
        &&   "$actual_string"   == [lindex $erratum 1] } then {
36
            eval [lindex $erratum 2]
37
        }
38
    }
39
}
40
 
41
# Test ptype of a class.
42
#
43
# Different C++ compilers produce different output.  To accommodate all
44
# the variations listed below, I read the output of "ptype" and process
45
# each line, matching it to the class description given in the
46
# parameters.
47
#
48
# IN_COMMAND and IN_TESTNAME are the command and testname for
49
# gdb_test_multiple.  If IN_TESTNAME is the empty string, then it
50
# defaults to IN_COMMAND.
51
#
52
# IN_KEY is "class" or "struct".  For now, I ignore it, and allow either
53
# "class" or "struct" in the output, as long as the access specifiers all
54
# work out okay.
55
#
56
# IN_TAG is the class tag or structure tag.
57
#
58
# IN_CLASS_TABLE is a list of class information.  Each entry contains a
59
# keyword and some values.  The keywords and their values are:
60
#
61
#   { base "base-declaration" }
62
#
63
#      the class has a base with the given declaration.
64
#
65
#   { vbase "name" }
66
#
67
#      the class has a virtual base pointer with the given name.  this
68
#      is for gcc 2.95.3, which emits ptype entries for the virtual base
69
#      pointers.  the vbase list includes both indirect and direct
70
#      virtual base classes (indeed, a virtual base is usually
71
#      indirect), so this information cannot be derived from the base
72
#      declarations.
73
#
74
#   { field "access" "declaration" }
75
#
76
#      the class has a data field with the given access type and the
77
#      given declaration.
78
#
79
#   { method "access" "declaration" }
80
#
81
#      the class has a member function with the given access type
82
#      and the given declaration.
83
#
84
# If you test the same class declaration more than once, you can specify
85
# IN_CLASS_TABLE as "ibid".  "ibid" means: look for a previous class
86
# table that had the same IN_KEY and IN_TAG, and re-use that table.
87
#
88
# IN_TAIL is the expected text after the close brace, specifically the "*"
89
# in "struct { ... } *".  This is an optional parameter.  The default
90
# value is "", for no tail.
91
#
92
# IN_ERRATA_TABLE is a list of errata entries.  See cp_check_errata for the
93
# format of the errata table.  Note: the errata entries are not subject to
94
# demangler syntax adjustment, so you have to make a bigger table
95
# with lines for each output variation.
96
#
97
# gdb can vary the output of ptype in several ways:
98
#
99
# . CLASS/STRUCT
100
#
101
#   The output can start with either "class" or "struct", depending on
102
#   what the symbol table reader in gdb decides.  This is usually
103
#   unrelated to the original source code.
104
#
105
#     dwarf-2  debug info distinguishes class/struct, but gdb ignores it
106
#     stabs+   debug info does not distinguish class/struct
107
#     hp       debug info distinguishes class/struct, and gdb honors it
108
#
109
#   I tried to accommodate this with regular expressions such as
110
#   "((class|struct) A \{ public:|struct A \{)", but that turns into a
111
#   hairy mess because of optional private virtual base pointers and
112
#   optional public synthetic operators.  This is the big reason I gave
113
#   up on regular expressions and started parsing the output.
114
#
115
# . REDUNDANT ACCESS SPECIFIER
116
#
117
#   In "class { private: ... }" or "struct { public: ... }", gdb might
118
#   or might not emit a redundant initial access specifier, depending
119
#   on the gcc version.
120
#
121
# . VIRTUAL BASE POINTERS
122
#
123
#   If a class has virtual bases, either direct or indirect, the class
124
#   will have virtual base pointers.  With gcc 2.95.3, gdb prints lines
125
#   for these virtual base pointers.  This does not happen with gcc
126
#   3.3.4, gcc 3.4.1, or hp acc A.03.45.
127
#
128
#   I accept these lines.  These lines are optional; but if I see one of
129
#   these lines, then I expect to see all of them.
130
#
131
#   Note: drow considers printing these lines to be a bug in gdb.
132
#
133
# . SYNTHETIC METHODS
134
#
135
#   A C++ compiler may synthesize some methods: an assignment
136
#   operator, a copy constructor, a constructor, and a destructor.  The
137
#   compiler might include debug information for these methods.
138
#
139
#     dwarf-2  gdb does not show these methods
140
#     stabs+   gdb shows these methods
141
#     hp       gdb does not show these methods
142
#
143
#   I accept these methods.  These lines are optional, and any or
144
#   all of them might appear, mixed in anywhere in the regular methods.
145
#
146
#   With gcc v2, the synthetic copy-ctor and ctor have an additional
147
#   "int" parameter at the beginning, the "in-charge" flag.
148
#
149
# . DEMANGLER SYNTAX VARIATIONS
150
#
151
#   Different demanglers produce "int foo(void)" versus "int foo()",
152
#   "const A&" versus "const A &", and so on.
153
#
154
# TESTED WITH
155
#
156
#   gcc 2.95.3 -gdwarf-2
157
#   gcc 2.95.3 -gstabs+
158
#   gcc 3.3.4 -gdwarf-2
159
#   gcc 3.3.4 -gstabs+
160
#   gcc 3.4.1 -gdwarf-2
161
#   gcc 3.4.1 -gstabs+
162
#   gcc HEAD 20040731 -gdwarf-2
163
#   gcc HEAD 20040731 -gstabs+
164
#
165
# TODO
166
#
167
# Tagless structs.
168
#
169
# "A*" versus "A *" and "A&" versus "A &" in user methods.
170
#
171
# Test with hp ACC.
172
#
173
# -- chastain 2004-08-07
174
 
175
proc cp_test_ptype_class { in_command in_testname in_key in_tag in_class_table { in_tail "" } { in_errata_table { } } } {
176
    global gdb_prompt
177
    set wsopt "\[\r\n\t \]*"
178
 
179
    # The test name defaults to the command.
180
 
181
    if { "$in_testname" == "" } then { set in_testname "$in_command" }
182
 
183
    # Save class tables in a history array for reuse.
184
 
185
    global cp_class_table_history
186
    if { $in_class_table == "ibid" } then {
187
        if { ! [info exists cp_class_table_history("$in_key,$in_tag") ] } then {
188
            fail "$in_testname // bad ibid"
189
            return
190
        }
191
        set in_class_table $cp_class_table_history("$in_key,$in_tag")
192
    } else {
193
        set cp_class_table_history("$in_key,$in_tag") $in_class_table
194
    }
195
 
196
    # Split the class table into separate tables.
197
 
198
    set list_bases   { }
199
    set list_vbases  { }
200
    set list_fields  { }
201
    set list_methods { }
202
 
203
    foreach class_line $in_class_table {
204
        switch [lindex $class_line 0] {
205
            "base"   { lappend list_bases   [lindex $class_line 1] }
206
            "vbase"  { lappend list_vbases  [lindex $class_line 1] }
207
            "field"  { lappend list_fields  [lrange $class_line 1 2] }
208
            "method" { lappend list_methods [lrange $class_line 1 2] }
209
            default  { fail "$in_testname // bad line in class table: $class_line"; return; }
210
        }
211
    }
212
 
213
    # Construct a list of synthetic operators.
214
    # These are: { count ccess-type regular-expression }.
215
 
216
    set list_synth { }
217
    lappend list_synth [list 0 "public" "$in_tag & operator=\\($in_tag const ?&\\);"]
218
    lappend list_synth [list 0 "public" "$in_tag\\((int,|) ?$in_tag const ?&\\);"]
219
    lappend list_synth [list 0 "public" "$in_tag\\((int|void|)\\);"]
220
 
221
    # Actually do the ptype.
222
 
223
    set parse_okay 0
224
    gdb_test_multiple "$in_command" "$in_testname // parse failed" {
225
        -re "type = (struct|class)${wsopt}(\[A-Za-z0-9_\]*)${wsopt}((:\[^\{\]*)?)${wsopt}\{(.*)\}${wsopt}(\[^\r\n\]*)\[\r\n\]+$gdb_prompt $" {
226
            set parse_okay          1
227
            set actual_key          $expect_out(1,string)
228
            set actual_tag          $expect_out(2,string)
229
            set actual_base_string  $expect_out(3,string)
230
            set actual_body         $expect_out(5,string)
231
            set actual_tail         $expect_out(6,string)
232
        }
233
    }
234
    if { ! $parse_okay } then { return }
235
 
236
    # Check the actual key.  It would be nice to require that it match
237
    # the input key, but gdb does not support that.  For now, accept any
238
    # $actual_key as long as the access property of each field/method
239
    # matches.
240
 
241
    switch "$actual_key" {
242
        "class"  { set access "private" }
243
        "struct" { set access "public"  }
244
        default  {
245
            cp_check_errata "class"  "$actual_key" $in_errata_table
246
            cp_check_errata "struct" "$actual_key" $in_errata_table
247
            fail "$in_testname // wrong key: $actual_key"
248
            return
249
        }
250
    }
251
 
252
    # Check the actual tag.
253
 
254
    if { "$actual_tag" != "$in_tag" } then {
255
        cp_check_errata "$in_tag" "$actual_tag" $in_errata_table
256
        fail "$in_testname // wrong tag: $actual_tag"
257
        return
258
    }
259
 
260
    # Check the actual bases.
261
    # First parse them into a list.
262
 
263
    set list_actual_bases { }
264
    if { "$actual_base_string" != "" } then {
265
        regsub "^:${wsopt}" $actual_base_string "" actual_base_string
266
        set list_actual_bases [split $actual_base_string ","]
267
    }
268
 
269
    # Check the base count.
270
 
271
    if { [llength $list_actual_bases] < [llength $list_bases] } then {
272
        fail "$in_testname // too few bases"
273
        return
274
    }
275
    if { [llength $list_actual_bases] > [llength $list_bases] } then {
276
        fail "$in_testname // too many bases"
277
        return
278
    }
279
 
280
    # Check each base.
281
 
282
    foreach actual_base $list_actual_bases {
283
        set actual_base [string trim $actual_base]
284
        set base [lindex $list_bases 0]
285
        if { "$actual_base" != "$base" } then {
286
            cp_check_errata "$base" "$actual_base" $in_errata_table
287
            fail "$in_testname // wrong base: $actual_base"
288
            return
289
        }
290
        set list_bases [lreplace $list_bases 0 0]
291
    }
292
 
293
    # Parse each line in the body.
294
 
295
    set last_was_access 0
296
    set vbase_match 0
297
 
298
    foreach actual_line [split $actual_body "\r\n"] {
299
 
300
        # Chomp the line.
301
 
302
        set actual_line [string trim $actual_line]
303
        if { "$actual_line" == "" } then { continue }
304
 
305
        # Access specifiers.
306
 
307
        if { [regexp "^(public|protected|private)${wsopt}:\$" "$actual_line" s0 s1] } then {
308
            set access "$s1"
309
            if { $last_was_access } then {
310
                fail "$in_testname // redundant access specifier"
311
                return
312
            }
313
            set last_was_access 1
314
            continue
315
        } else {
316
            set last_was_access 0
317
        }
318
 
319
        # Optional virtual base pointer.
320
 
321
        if { [ llength $list_vbases ] > 0 } then {
322
            set vbase [lindex $list_vbases 0]
323
            if { [ regexp "$vbase \\*(_vb.|_vb\\\$|__vb_)\[0-9\]*$vbase;" $actual_line ] } then {
324
                if { "$access" != "private" } then {
325
                    cp_check_errata "private" "$access" $in_errata_table
326
                    fail "$in_testname // wrong access specifier for virtual base: $access"
327
                    return
328
                }
329
                set list_vbases [lreplace $list_vbases 0 0]
330
                set vbase_match 1
331
                continue
332
            }
333
        }
334
 
335
        # Data field.
336
 
337
        if { [llength $list_fields] > 0 } then {
338
            set field_access [lindex [lindex $list_fields 0] 0]
339
            set field_decl   [lindex [lindex $list_fields 0] 1]
340
            if { "$actual_line" == "$field_decl" } then {
341
                if { "$access" != "$field_access" } then {
342
                    cp_check_errata "$field_access" "$access" $in_errata_table
343
                    fail "$in_testname // wrong access specifier for field: $access"
344
                    return
345
                }
346
                set list_fields [lreplace $list_fields 0 0]
347
                continue
348
            }
349
 
350
            # Data fields must appear before synths and methods.
351
            cp_check_errata "$field_decl" "$actual_line" $in_errata_table
352
            fail "$in_testname // unrecognized line type 1: $actual_line"
353
            return
354
        }
355
 
356
        # Method function.
357
 
358
        if { [llength $list_methods] > 0 } then {
359
            set method_access [lindex [lindex $list_methods 0] 0]
360
            set method_decl   [lindex [lindex $list_methods 0] 1]
361
            if { "$actual_line" == "$method_decl" } then {
362
                if { "$access" != "$method_access" } then {
363
                    cp_check_errata "$method_access" "$access" $in_errata_table
364
                    fail "$in_testname // wrong access specifier for method: $access"
365
                    return
366
                }
367
                set list_methods [lreplace $list_methods 0 0]
368
                continue
369
            }
370
 
371
            # gcc 2.95.3 shows "foo()" as "foo(void)".
372
            regsub -all "\\(\\)" $method_decl "(void)" method_decl
373
            if { "$actual_line" == "$method_decl" } then {
374
                if { "$access" != "$method_access" } then {
375
                    cp_check_errata "$method_access" "$access" $in_errata_table
376
                    fail "$in_testname // wrong access specifier for method: $access"
377
                    return
378
                }
379
                set list_methods [lreplace $list_methods 0 0]
380
                continue
381
            }
382
        }
383
 
384
        # Synthetic operators.  These are optional and can be mixed in
385
        # with the methods in any order, but duplicates are wrong.
386
        #
387
        # This test must come after the user methods, so that a user
388
        # method which matches a synth-method pattern is treated
389
        # properly as a user method.
390
 
391
        set synth_match 0
392
        for { set isynth 0 } { $isynth < [llength $list_synth] } { incr isynth } {
393
            set synth         [lindex $list_synth $isynth]
394
            set synth_count   [lindex $synth 0]
395
            set synth_access  [lindex $synth 1]
396
            set synth_re      [lindex $synth 2]
397
 
398
            if { [ regexp "$synth_re" "$actual_line" ] } then {
399
 
400
                if { "$access" != "$synth_access" } then {
401
                    cp_check_errata "$synth_access" "$access" $in_errata_table
402
                    fail "$in_testname // wrong access specifier for synthetic operator: $access"
403
                    return
404
                }
405
 
406
                if { $synth_count > 0 } then {
407
                    cp_check_errata "$actual_line" "$actual_line" $in_errata_table
408
                    fail "$in_testname // duplicate synthetic operator: $actual_line"
409
                }
410
 
411
                # Update the count in list_synth.
412
 
413
                incr synth_count
414
                set synth [list $synth_count $synth_access "$synth_re"]
415
                set list_synth [lreplace $list_synth $isynth $isynth $synth]
416
 
417
                # Match found.
418
 
419
                set synth_match 1
420
                break
421
            }
422
        }
423
        if { $synth_match } then { continue }
424
 
425
        # Unrecognized line.
426
 
427
        if { [llength $list_methods] > 0 } then {
428
            set method_decl [lindex [lindex $list_methods 0] 1]
429
            cp_check_errata "$method_decl" "$actual_line" $in_errata_table
430
        }
431
 
432
        fail "$in_testname // unrecognized line type 2: $actual_line"
433
        return
434
    }
435
 
436
    # Check for missing elements.
437
 
438
    if { $vbase_match } then {
439
        if { [llength $list_vbases] > 0 } then {
440
            fail "$in_testname // missing virtual base pointers"
441
            return
442
        }
443
    }
444
 
445
    if { [llength $list_fields] > 0 } then {
446
        fail "$in_testname // missing fields"
447
        return
448
    }
449
 
450
    if { [llength $list_methods] > 0 } then {
451
        fail "$in_testname // missing methods"
452
        return
453
    }
454
 
455
    # Check the tail.
456
 
457
    set actual_tail [string trim $actual_tail]
458
    if { "$actual_tail" != "$in_tail" } then {
459
        cp_check_errata "$in_tail" "$actual_tail" $in_errata_table
460
        fail "$in_testname // wrong tail: $actual_tail"
461
        return
462
    }
463
 
464
    # It all worked!
465
 
466
    pass "$in_testname"
467
    return
468
}

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