gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp

   1 # Copyright (C) 2014 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 # In this test we're looking at how gdb handles backtraces and
  17 # investigating the stack depth when confronted with an "invalid" stack,
  18 # that is a stack where the first few frames are normal, and then there's a
  19 # frame where the stack in unreadable.
  20 #
  21 # One interesting bug that has been observed is that gdb will sometime
  22 # exhibit different behaviour the first time a stack command is run
  23 # compared to the second (and later) times a command is run.  This is
  24 # because the first time a command is run gdb actually tries to figure out
  25 # the answer, while the second (and later) times gdb relies on the answer
  26 # cached from the first time.  As a result in this test each command is
  27 # run twice, and we restart gdb before testing each different command to
  28 # ensure that nothing is being cached.
  29
  30 set opts {}
  31 standard_testfile .S
  32
  33 if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
  34     verbose "Skipping ${testfile}."
  35     return
  36 }
  37
  38 if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} $opts] } {
  39     return -1
  40 }
  41
  42 if ![runto breakpt] {
  43     return -1
  44 }
  45
  46 gdb_test "bt" "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\r\nCannot access memory at address 0x\[0-9a-f\]+" \
  47          "first backtrace, with error message"
  48
  49 send_gdb "bt\n"
  50 gdb_expect {
  51     -re "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\r\nCannot access memory at address 0x\[0-9a-f\]+\r\n$gdb_prompt $" {
  52         # Currently gdb will not display the error message associated with
  53         # the truncated backtrace after the first backtrace has been
  54         # completed.  Ideally, we would do this.  If this case is ever hit
  55         # then we have started to display the backtrace in all cases and
  56         # the xpass should becomd a pass, and the previous pass case below
  57         # should be removed, or changed to a fail.
  58         xpass "second backtrace, with error message"
  59     }
  60     -re "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\r\n$gdb_prompt $" {
  61         pass "second backtrace, without error message"
  62     }
  63     timeout {
  64         fail "second backtrace (timeout)"
  65     }
  66 }
  67
  68 clean_restart ${binfile}
  69
  70 if ![runto breakpt] {
  71     return -1
  72 }
  73
  74 set test_name "check mi -stack-info-depth command, first time"
  75 send_gdb "interpreter-exec mi \"-stack-info-depth\"\n"
  76 gdb_expect {
  77     -re "\\^done,depth=\"4\"\r\n$gdb_prompt $" {
  78         pass $test_name
  79     }
  80     -re "\\^error,msg=\"Cannot access memory at address $hex\"\r\n$gdb_prompt $" {
  81         xfail $test_name
  82     }
  83 }
  84
  85 gdb_test "interpreter-exec mi \"-stack-info-depth\"" \
  86     "\\^done,depth=\"4\"" \
  87     "check mi -stack-info-depth command, second time"
  88
  89 clean_restart ${binfile}
  90
  91 if ![runto breakpt] {
  92     return -1
  93 }
  94
  95 set test_name "check mi -stack-list-frames command, first time"
  96 send_gdb "interpreter-exec mi \"-stack-list-frames\"\n"
  97 gdb_expect {
  98     -re "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"breakpt\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"func5\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"2\",addr=\"$hex\",func=\"func4\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"3\",addr=\"$hex\",func=\"func3\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\}\\\]\r\n$gdb_prompt $" {
  99         pass $test_name
 100     }
 101     -re "\\^error,msg=\"Cannot access memory at address $hex\"\r\n$gdb_prompt $" {
 102         xfail $test_name
 103     }
 104 }
 105
 106 gdb_test "interpreter-exec mi \"-stack-list-frames\"" \
 107     "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"breakpt\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"func5\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"2\",addr=\"$hex\",func=\"func4\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"3\",addr=\"$hex\",func=\"func3\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\}\\\]" \
 108     "check mi -stack-list-frames command, second time"