gdb/testsuite/gdb.trace/backtrace.exp

   1 #   Copyright 1998-2018 Free Software Foundation, Inc.
   2 #
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # This file was written by Michael Snyder (msnyder@cygnus.com)
  17
  18 load_lib "trace-support.exp"
  19
  20 standard_testfile actions.c
  21 set executable $testfile
  22 set expfile $testfile.exp
  23
  24 if ![gdb_trace_common_supports_arch] {
  25     unsupported "no trace-common.h support for arch"
  26     return -1
  27 }
  28
  29 if [prepare_for_testing "failed to prepare" $executable $srcfile \
  30         [list debug nowarnings]] {
  31     return -1
  32 }
  33
  34 if ![runto_main] {
  35     fail "can't run to main to check for trace support"
  36     return -1
  37 }
  38
  39 if { ![gdb_target_supports_trace] } then {
  40     unsupported "current target does not support trace"
  41     return 1
  42
  43 }
  44
  45 #
  46 # test backtraces in trace frames
  47 #
  48
  49 set testline1 0
  50 set testline2 0
  51 set testline3 0
  52 set testline4 0
  53 set testline5 0
  54 set testline6 0
  55
  56 set arg1 1
  57 set arg2 2
  58 set arg3 3
  59 set arg4 4
  60 set arg5 5
  61 set arg6 6
  62
  63 set baseline [gdb_find_recursion_test_baseline $srcfile]
  64 if { $baseline == -1 } {
  65     fail "could not find gdb_recursion_test function"
  66     return
  67 }
  68
  69 set return_me 0
  70
  71 gdb_test_multiple "list $baseline, +12" "all tests in this module will fail" {
  72     -re "\[\r\n\](\[0-9\]+).*gdbtestline 1 " {
  73         set testline1 $expect_out(1,string)
  74         exp_continue
  75     }
  76     -re "\[\r\n\](\[0-9\]+).*gdbtestline 2 " {
  77         set testline2 $expect_out(1,string)
  78         exp_continue
  79     }
  80     -re "\[\r\n\](\[0-9\]+).*gdbtestline 3 " {
  81         set testline3 $expect_out(1,string)
  82         exp_continue
  83     }
  84     -re "\[\r\n\](\[0-9\]+).*gdbtestline 4 " {
  85         set testline4 $expect_out(1,string)
  86         exp_continue
  87     }
  88     -re "\[\r\n\](\[0-9\]+).*gdbtestline 5 " {
  89         set testline5 $expect_out(1,string)
  90         exp_continue
  91     }
  92     -re "\[\r\n\](\[0-9\]+).*gdbtestline 6 " {
  93         set testline6 $expect_out(1,string)
  94         exp_continue
  95     }
  96     -re ".*$gdb_prompt $" {
  97         if { ($testline1 == 0) || ($testline2 == 0) || ($testline3 == 0) || ($testline4 == 0) || ($testline5 == 0) || ($testline6 == 0) } {
  98             untested "unexpected testline values"
  99             set return_me 1
 100 all tests in this module will fail."
 101         }
 102     }
 103     default {
 104             untested "couldn't match pattern"
 105             set return_me 1
 106 all tests in this module will fail."
 107     }
 108 }
 109
 110 if { $return_me == 1 } then {
 111     return -1
 112 }
 113
 114 #
 115 # Setup backtrace experiment.  This will involve:
 116 #   1) a tracepoint where nothing is collected
 117 #   2) a tracepoint where only regs are collected
 118 #   3) a tracepoint where regs, locals and args are collected
 119 #   4) a tracepoint where regs plus some amount of stack are collected.
 120 #
 121
 122 gdb_delete_tracepoints
 123 set tdp2 [gdb_gettpnum $testline2]
 124 set tdp3 [gdb_gettpnum $testline3]
 125 set tdp4 [gdb_gettpnum $testline4]
 126 set tdp5 [gdb_gettpnum $testline5]
 127 set tdp6 [gdb_gettpnum $testline6]
 128 if {    $tdp2 <= 0 || $tdp3 <= 0 || \
 129         $tdp4 <= 0 || $tdp5 <= 0 || $tdp6 <= 0 } then {
 130     fail "setting tracepoints failed"
 131     return
 132 }
 133
 134 #gdb_trace_setactions "setup TP to collect FP" \
 135 #       "$tdp2" \
 136 #       "collect \$fp" ""
 137 #
 138
 139 gdb_trace_setactions "8.6: setup TP to collect regs" \
 140         "$tdp3" \
 141         "collect \$regs" "^$"
 142
 143 gdb_trace_setactions "8.6: setup TP to collect regs, args, and locals" \
 144         "$tdp4" \
 145         "collect \$regs, \$args, \$locs" "^$"
 146
 147 gdb_trace_setactions "8.6: setup TP to collect stack mem cast expr" \
 148        "$tdp6" \
 149        "collect \$$fpreg, \(\*\(void \*\*\) \(\$$spreg\)\) @ 128" "^$"
 150
 151 gdb_test_no_output "tstart" ""
 152
 153 gdb_breakpoint "end" qualified
 154 gdb_test "continue" \
 155     "Continuing.*Breakpoint $decimal, end.*" \
 156     "run trace experiment"
 157
 158 gdb_test_no_output "tstop" ""
 159
 160 proc gdb_backtrace_tdp_1 { msg } {
 161     global gdb_prompt
 162
 163     # We are in a trace frame at which we didn't collect anything
 164     # except $PC.  Therefore we expect to be able to identify stack
 165     # frame #0, but that's about all.  In particular we do not expect
 166     # to be able to display the function's arguments or locals, and we
 167     # do not expect to be able to identify the caller of this function.
 168
 169     gdb_test "backtrace" \
 170         "#0\[\t \]+gdb_recursion_test.*depth=.*" \
 171         "$msg"
 172 }
 173
 174 proc gdb_backtrace_tdp_2 { msg } {
 175     global gdb_prompt
 176
 177     # We are in a trace frame at which we collected only the registers
 178     # Therefore we expect to be able to identify stack frame #0, but
 179     # we don't expect to be able to display its args unles they are
 180     # passed in registers (which isn't the case for m68k), and we
 181     # don't expect to be able to identify the caller's stack frame.
 182
 183     gdb_test "backtrace" \
 184         "#0\[\t \]+gdb_recursion_test.*depth=.*" \
 185         "$msg"
 186 }
 187
 188 proc gdb_backtrace_tdp_3 { msg } {
 189     global gdb_prompt
 190
 191     # We are in a trace frame at which we collected all registers, all
 192     # arguments and all locals.  This means that the display of
 193     # stack frame #0 should be complete (including argument values).
 194
 195     gdb_test_multiple "backtrace" "$msg" {
 196         -re "#0\[\t \]+gdb_recursion_test.*depth=\[0-9\]+.*q1=\[0-9\]+.*q2=\[0-9\]+.*q3=\[0-9\]+.*q4=\[0-9\]+.*q5=\[0-9\]+.*q6=\[0-9\]+.*$gdb_prompt $" {
 197             pass "$msg"
 198         }
 199         -re "#0\[\t \]+gdb_recursion_test.*depth=Cannot access.*$gdb_prompt $" {
 200             fail "$msg (failed to collect arguments)"
 201         }
 202     }
 203 }
 204
 205 proc gdb_backtrace_tdp_4 { msg depth traceframe } {
 206     global gdb_prompt
 207
 208     with_test_prefix "traceframe $traceframe" {
 209         # We are in a trace frame at which we collected all registers,
 210         # plus a sizeable hunk of stack memory.  This should enable us to
 211         # display at least several stack frames worth of backtrace.  We'll
 212         # assume that if we can't display at least "depth" levels (with
 213         # args), it counts as an error.
 214
 215         gdb_test_multiple "backtrace" "$msg" {
 216             -re "#$depth\[\t \].*gdb_recursion_test.*depth=\[0-9\]+.*q1=\[0-9\]+.*q2=\[0-9\]+.*q3=\[0-9\]+.*q4=\[0-9\]+.*q5=\[0-9\]+.*q6=\[0-9\]+.*$gdb_prompt $" {
 217                 pass "$msg"
 218             }
 219             -re "#$depth\[\t \].*gdb_recursion_test.*depth=.*$gdb_prompt $" {
 220                 fail "$msg (args missing from #$depth stack frame)"
 221             }
 222             -re "#\[0-9\]+\[\t \].*gdb_recursion_test.*depth=.*$gdb_prompt $" {
 223                 fail "$msg (fewer than $depth stack frames found)"
 224             }
 225         }
 226
 227         set output_string0 ""
 228         # Match the output of command 'tdump' and save it in
 229         # $output_string0.
 230         set test "tdump on frame 0"
 231         gdb_test_multiple "tdump" $test {
 232             -re "tdump\[\r\n\]+(.*)\[\r\n\]+$gdb_prompt $" {
 233                 set output_string0 $expect_out(1,string)
 234             }
 235         }
 236
 237         gdb_test "up" ".*" ""
 238
 239         # Test that command 'tdump' still works properly when the
 240         # selected frame is not the current frame, and save the output
 241         # in $output_string1.
 242         set test "tdump on frame 1"
 243         set output_string1 ""
 244         gdb_test_multiple "tdump" $test {
 245             -re "tdump\[\r\n\]+(.*)\[\r\n\]+$gdb_prompt $" {
 246                 set output_string1 $expect_out(1,string)
 247             }
 248         }
 249
 250         # Output of 'tdump' on frame 0 and frame 1 should be
 251         # identical.
 252         gdb_assert ![string compare $output_string0 $output_string1] \
 253             "tdump output"
 254     }
 255 }
 256
 257 #
 258 # begin backtrace test
 259 #
 260
 261 set timeout 60
 262
 263 gdb_tfind_test "init: make sure not debugging any trace frame" "none" "-1"
 264
 265 gdb_tfind_test "8.6: find start frame" "start" "0"
 266 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 267         "TDP $tdp2:" ""
 268 gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 1, collect nothing"
 269
 270 gdb_tfind_test "8.6: find frame 1"     "1" "1"
 271 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 272         "TDP $tdp3:" ""
 273 gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 1, collect regs"
 274
 275 gdb_tfind_test "8.6: find frame 2"     "2" "2"
 276 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 277         "TDP $tdp4:" ""
 278 gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 1, collect args and locals"
 279
 280
 281 gdb_tfind_test "8.6: find frame 4"     "4" "4"
 282 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 283         "TDP $tdp6:" ""
 284 gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 4
 285
 286 gdb_tfind_test "8.6: find frame 5"     "5" "5"
 287 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 288         "TDP $tdp2:" ""
 289 gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 2, collect nothing"
 290
 291 gdb_tfind_test "8.6: find frame 6"     "6" "6"
 292 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 293         "TDP $tdp3:" ""
 294 gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 2, collect regs"
 295
 296 gdb_tfind_test "8.6: find frame 7"     "7" "7"
 297 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 298         "TDP $tdp4:" ""
 299 gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 2, collect args and locals"
 300
 301
 302 gdb_tfind_test "8.6: find frame 9"     "9" "9"
 303 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 304         "TDP $tdp6:" ""
 305 gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 9
 306
 307 gdb_tfind_test "8.6: find frame 10"    "10" "10"
 308 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 309         "TDP $tdp2:" ""
 310 gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 3, collect nothing"
 311
 312 gdb_tfind_test "8.6: find frame 11"    "11" "11"
 313 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 314         "TDP $tdp3:" ""
 315 gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 3, collect regs"
 316
 317 gdb_tfind_test "8.6: find frame 12"    "12" "12"
 318 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 319         "TDP $tdp4:" ""
 320 gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 3, collect args and locals"
 321
 322
 323 gdb_tfind_test "8.6: find frame 14"    "14" "14"
 324 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 325         "TDP $tdp6:" ""
 326 gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 14
 327
 328 gdb_tfind_test "8.6: find frame 15"    "15" "15"
 329 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 330         "TDP $tdp2:" ""
 331 gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 4, collect nothing"
 332
 333 gdb_tfind_test "8.6: find frame 16"    "16" "16"
 334 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 335         "TDP $tdp3:" ""
 336 gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 4, collect regs"
 337
 338 gdb_tfind_test "8.6: find frame 17"    "17" "17"
 339 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 340         "TDP $tdp4:" ""
 341 gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 4, collect args and locals"
 342
 343
 344 gdb_tfind_test "8.6: find frame 19"    "19" "19"
 345 gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
 346         "TDP $tdp6:" ""
 347 gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 19
 348
 349 gdb_test "printf \"x \%d x\\n\", depth == 3" \
 350         "x 0 x" \
 351         "1.13: trace in recursion: depth not equal to 3"
 352
 353 # Finished!
 354 gdb_test "tfind none" ".*" ""