gdb/testsuite/gdb.trace/unavailable.exp

   1 # Copyright 1998, 2005, 2007, 2008, 2009, 2010, 2011
   2 # Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 load_lib "trace-support.exp"
  18
  19 set testfile "unavailable"
  20 set srcfile ${testfile}.cc
  21 set executable $testfile
  22 set binfile $objdir/$subdir/$executable
  23
  24 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  25         executable {debug nowarnings c++}] != "" } {
  26     untested unavailable.exp
  27     return -1
  28 }
  29
  30 set ws "\[\r\n\t \]+"
  31 set cr "\[\r\n\]+"
  32
  33 #
  34 # Utility procs
  35 #
  36
  37 proc prepare_for_trace_test {} {
  38     global executable
  39
  40     clean_restart $executable
  41
  42     runto_main
  43
  44     gdb_test "break begin" ".*" ""
  45     gdb_test "break end" ".*" ""
  46 }
  47
  48 proc run_trace_experiment { test_func } {
  49     global gdb_prompt
  50
  51     gdb_test "continue" \
  52         ".*Breakpoint \[0-9\]+, begin .*" \
  53         "advance to begin"
  54
  55     gdb_test_no_output "tstart" "start trace experiment"
  56
  57     gdb_test "continue" \
  58             "Continuing.*Breakpoint \[0-9\]+, end.*" \
  59             "run trace experiment"
  60     gdb_test "tstop" \
  61             "\[\r\n\]+" \
  62             "stop trace experiment"
  63     gdb_test "tfind start" \
  64             "#0  $test_func .*" \
  65             "tfind test frame"
  66 }
  67
  68 #
  69 # Test procs
  70 #
  71
  72 proc gdb_collect_globals_test { } {
  73     global ws
  74     global cr
  75     global gdb_prompt
  76     global hex
  77     global pf_prefix
  78
  79     set old_pf_prefix $pf_prefix
  80     set pf_prefix "$pf_prefix collect globals:"
  81
  82     prepare_for_trace_test
  83
  84     set testline [gdb_get_line_number "set globals_test_func tracepoint here"]
  85
  86     gdb_test "trace $testline" \
  87             "Tracepoint \[0-9\]+ at .*" \
  88             "set tracepoint"
  89
  90     # We collect the initial sizeof(pointer) bytes of derived_partial
  91     # in an attempt of collecting the vptr.  Not portable, but should
  92     # work everywhere we need to care.
  93     gdb_trace_setactions "define actions" \
  94         "" \
  95         "collect struct_b.struct_a.array\[2\]" "^$" \
  96         "collect struct_b.struct_a.array\[100\]" "^$" \
  97         \
  98         "collect a" "^$" \
  99         "collect c" "^$" \
 100         \
 101         "collect tarray\[0\].a" "^$" \
 102         "collect tarray\[1\].a" "^$" \
 103         "collect tarray\[3\].a" "^$" \
 104         "collect tarray\[3\].b" "^$" \
 105         "collect tarray\[4\].b" "^$" \
 106         "collect tarray\[5\].b" "^$" \
 107         \
 108         "collect g_string_p" "^$" \
 109         "collect g_string_partial\[1\]" "^$" \
 110         "collect g_string_partial\[2\]" "^$" \
 111         \
 112         "collect g_structref_p" "^$" \
 113         \
 114         "collect *((char *)&derived_partial)@sizeof\(void *\)" "^$" \
 115         "collect derived_whole" "^$" \
 116         \
 117         "collect virtual_partial.z" "^$"
 118
 119     # Begin the test.
 120     run_trace_experiment globals_test_func
 121
 122     gdb_test "print globalc" " = <unavailable>"
 123     gdb_test "print globali" " = <unavailable>"
 124     gdb_test "print globalf" " = <unavailable>"
 125     gdb_test "print globald" " = <unavailable>"
 126
 127     gdb_test "print globalstruct.memberc" " = <unavailable>"
 128     gdb_test "print globalstruct.memberi" " = <unavailable>"
 129     gdb_test "print globalstruct.memberf" " = <unavailable>"
 130     gdb_test "print globalstruct.memberd" " = <unavailable>"
 131
 132     gdb_test "print globalstruct" \
 133             " = {memberc = <unavailable>, memberi = <unavailable>, memberf = <unavailable>, memberd = <unavailable>}"
 134
 135     gdb_test "print globalp == &globalstruct" \
 136             "value is not available" \
 137             "can't compare using non collected global pointer"
 138
 139     gdb_test "print globalarr\[1\]" " = <unavailable>"
 140     gdb_test "print globalarr\[2\]" " = <unavailable>"
 141     gdb_test "print globalarr\[3\]" " = <unavailable>"
 142
 143     gdb_test "print struct_b" \
 144         " = {d = <unavailable>, ef = <unavailable>, struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable>, <unavailable>, -1431655766, <unavailable> <repeats 97 times>, -1431655766, <unavailable> <repeats 9899 times>}, ptr = <unavailable>, bitfield = <unavailable>}, s = <unavailable>, static static_struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable> <repeats 10000 times>}, ptr = <unavailable>, bitfield = <unavailable>}, string = <unavailable>}"
 145
 146     gdb_test "print /x struct_b" \
 147         " = {d = <unavailable>, ef = <unavailable>, struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}, ptr = <unavailable>, bitfield = <unavailable>}, s = <unavailable>, static static_struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable> <repeats 10000 times>}, ptr = <unavailable>, bitfield = <unavailable>}, string = <unavailable>}"
 148
 149     gdb_test "print /x struct_b.struct_a" \
 150         " = {a = <unavailable>, b = <unavailable>, array = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}, ptr = <unavailable>, bitfield = <unavailable>}"
 151
 152     gdb_test "print /x struct_b.struct_a.array" \
 153         " = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}"
 154
 155     gdb_test "print /x struct_b.struct_a.array\[0\]" " = <unavailable>"
 156
 157     gdb_test "print /x struct_b.struct_a.array\[2\]" " = 0xaaaaaaaa"
 158
 159     # Check the target doesn't overcollect.  GDB used to merge memory
 160     # ranges to collect if they were close enough (collecting the hole
 161     # as well), but does not do that anymore.  It's plausible that a
 162     # target may do this on its end, but as of this writing, no known
 163     # target does it.
 164     gdb_test "print {a, b, c}" \
 165         " = \\{1, <unavailable>, 3\\}" \
 166         "No overcollect of almost but not quite adjacent memory ranges"
 167
 168     # Check <unavailable> isn't confused with 0 in array element repetitions
 169
 170     gdb_test_no_output "set print repeat 1"
 171
 172     gdb_test "print /x tarray" \
 173         " = \{\{a = 0x0, b = <unavailable>\} <repeats 2 times>, \{a = <unavailable>, b = <unavailable>\}, \{a = 0x0, b = 0x0\}, \{a = <unavailable>, b = 0x0\} <repeats 2 times>, \{a = <unavailable>, b = <unavailable>\} <repeats 2 times>\}" \
 174         "<unavailable> is not the same as 0 in array element repetitions"
 175
 176     gdb_test_no_output "set print repeat 10"
 177
 178     # Check that value repeat handles unavailable-ness.
 179     gdb_test "print *tarray@3" " = \\{\\{a = 0, b = <unavailable>\\}, \\{a = 0, b = <unavailable>\\}, \\{a = <unavailable>, b = <unavailable>\\}\\}"
 180
 181     # Static fields
 182
 183     gdb_test "print struct_b.static_struct_a" \
 184         " = {a = <unavailable>, b = <unavailable>, array = {<unavailable> <repeats 10000 times>}, ptr = <unavailable>, bitfield = <unavailable>}"
 185
 186     # Bitfields
 187
 188     gdb_test "print struct_b.struct_a.bitfield" " = <unavailable>"
 189
 190     # References
 191
 192     gdb_test "print g_int" " = <unavailable>"
 193
 194     gdb_test "print g_ref" \
 195         "\\(int &\\) @$hex: <unavailable>" \
 196         "global reference shows address but not value"
 197
 198     gdb_test "print *&g_ref" \
 199         "\\$\[0-9\]+ = <unavailable>$cr" \
 200         "referenced integer was not collected (taking address of reference)"
 201
 202     gdb_test "print *g_structref_p" \
 203         " = {d = <unavailable>, ref = <unavailable>}"
 204
 205     # Strings
 206
 207     # Const string is always available, even when not collected.
 208     gdb_test "print g_const_string" \
 209         " = \"hello world\"$cr" \
 210         "non collected const string is still printable"
 211
 212     gdb_test "print g_string_p" \
 213         " = $hex \"hello world\"" \
 214         "printing constant string through collected pointer"
 215
 216     gdb_test "print g_string_unavail" \
 217         " = \{<unavailable> <repeats 12 times>\}" \
 218         "printing non collected string"
 219
 220     # Incomplete strings print as an array.
 221     gdb_test "print g_string_partial" \
 222         "\\$\[0-9\]+ = \{<unavailable>, 101 'e', 108 'l', <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>\}" \
 223         "printing partially collected string"
 224
 225     # It is important for this test that the last examined value is
 226     # <unavailable>, to exercise the case of the $__ convenience
 227     # variable being set to <unavailable> without error.
 228     set msg "examining partially collected object"
 229     gdb_test_multiple "x /10x &struct_b" "$msg" {
 230         -re "$hex <struct_b>:${ws}<unavailable>${ws}<unavailable>${ws}<unavailable>${ws}<unavailable>$cr$hex <struct_b\\+16>:${ws}<unavailable>${ws}<unavailable>${ws}0xaaaaaaaa${ws}<unavailable>$cr$hex <struct_b\\+32>:${ws}<unavailable>${ws}<unavailable>$cr$gdb_prompt $" {
 231             pass "$msg"
 232         }
 233         -re "value is not available" {
 234             fail "$msg"
 235         }
 236     }
 237
 238     gdb_test "p \$__" " = <unavailable>" "last examined value was <unavailable>"
 239
 240     # This tests that building the array does not require accessing
 241     # g_int's contents.
 242     gdb_test "print { 1, g_int, 3 }" \
 243         " = \\{1, <unavailable>, 3\\}" \
 244         "build array from unavailable value"
 245
 246     # Note, depends on previous test.
 247     gdb_test "print \$\[1\]" \
 248         " = <unavailable>" \
 249         "subscript a non-memory rvalue array, accessing an unvailable element"
 250
 251     # Access a field of a non-lazy value, making sure the
 252     # unavailable-ness is propagated.  History values are easy
 253     # non-lazy values, so use those.  The first test just sets up for
 254     # the second.
 255     gdb_test "print g_smallstruct" " = \\{member = <unavailable>\\}"
 256     gdb_test "print \$.member" " = <unavailable>"
 257
 258     # Cast to baseclass, checking the unavailable-ness is propagated.
 259     gdb_test "print (small_struct) g_smallstruct_b" " = \\{member = <unavailable>\\}"
 260
 261     # Same cast, but starting from a non-lazy, value.
 262     gdb_test "print g_smallstruct_b" " = \\{<small_struct> = \\{member = <unavailable>\\}, <No data fields>\\}"
 263     gdb_test "print (small_struct) \$" " = \\{member = <unavailable>\\}"
 264
 265     gdb_test_no_output "set print object on"
 266
 267     set old_pf_prefix_2 $pf_prefix
 268     set pf_prefix "$pf_prefix print object on:"
 269
 270     # With print object on, printing a pointer may need to fetch the
 271     # pointed-to object, to check its run-time type.  Make sure that
 272     # fails gracefully and transparently when the pointer itself is
 273     # unavailable.
 274     gdb_test "print virtualp" " = \\(Virtual \\*\\) <unavailable>"
 275
 276     # no vtable pointer available
 277     gdb_test "print derived_unavail" \
 278         " = {<Middle> = <unavailable>, _vptr.Derived = <unavailable>, z = <unavailable>}"
 279
 280     # vtable pointer available, but nothing else
 281     gdb_test "print derived_partial" \
 282         " = \\(Derived\\) {<Middle> = {<Base> = <unavailable>, _vptr.Middle = <unavailable>, y = <unavailable>}, _vptr.Derived = $hex, z = <unavailable>}"
 283
 284     # whole object available
 285     gdb_test "print derived_whole" \
 286         " = \\(Derived\\) {<Middle> = {<Base> = {x = 2}, _vptr.Middle = $hex, y = 3}, _vptr.Derived = $hex, z = 4}"
 287
 288     set pf_prefix $old_pf_prefix_2
 289
 290     gdb_test_no_output "set print object off"
 291
 292     set pf_prefix "$pf_prefix print object off:"
 293
 294     gdb_test "print virtualp" " = \\(Virtual \\*\\) <unavailable>"
 295
 296     # no vtable pointer available
 297     gdb_test "print derived_unavail" \
 298         " = {<Middle> = <unavailable>, _vptr.Derived = <unavailable>, z = <unavailable>}"
 299
 300     # vtable pointer available, but nothing else
 301     gdb_test "print derived_partial" \
 302         " = {<Middle> = {<Base> = <unavailable>, _vptr.Middle = <unavailable>, y = <unavailable>}, _vptr.Derived = $hex, z = <unavailable>}"
 303
 304     # whole object available
 305     gdb_test "print derived_whole" \
 306         " = {<Middle> = {<Base> = {x = 2}, _vptr.Middle = $hex, y = 3}, _vptr.Derived = $hex, z = 4}"
 307
 308     set pf_prefix $old_pf_prefix_2
 309
 310     # An instance of a virtual class where we collected everything but
 311     # the vptr.
 312     gdb_test "print virtual_partial" \
 313         " = {_vptr.Virtual = <unavailable>, z = 0}"
 314
 315     gdb_test "tfind none" \
 316         "#0  end .*" \
 317         "cease trace debugging"
 318
 319     set pf_prefix $old_pf_prefix
 320 }
 321
 322 proc gdb_trace_collection_test {} {
 323     gdb_collect_globals_test
 324 }
 325
 326 clean_restart $executable
 327 runto_main
 328
 329 # We generously give ourselves one "pass" if we successfully
 330 # detect that this test cannot be run on this target!
 331 if { ![gdb_target_supports_trace] } then {
 332     pass "Current target does not support trace"
 333     return 1;
 334 }
 335
 336 # Body of test encased in a proc so we can return prematurely.
 337 gdb_trace_collection_test
 338
 339 # Finished!
 340 gdb_test "tfind none" ".*" ""