gdb/testsuite/gdb.arch/i386-bp_permanent.exp

   1 # Copyright (C) 2008-2022 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
  17 # This file is part of the gdb testsuite.
  18
  19 # Test stepping over permanent breakpoints on i386.
  20
  21 if {![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"]} {
  22     verbose "Skipping skip over permanent breakpoint on i386 tests."
  23     return
  24 }
  25
  26 standard_testfile
  27
  28 # some targets have leading underscores on assembly symbols.
  29 set additional_flags [gdb_target_symbol_prefix_flags]
  30
  31 # Don't use "debug", so that we don't have line information for the assembly
  32 # fragments.
  33 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list $additional_flags]] != "" } {
  34     untested "failed to compile"
  35     return -1
  36 }
  37
  38
  39 gdb_exit
  40 gdb_start
  41 gdb_reinitialize_dir $srcdir/$subdir
  42 gdb_load ${binfile}
  43
  44 #
  45 # Run to `main' where we begin our tests.
  46 #
  47
  48 if {![runto_main]} {
  49   return -1
  50 }
  51
  52 set function "standard"
  53
  54 set retcode [gdb_test_multiple "disassemble $function" "disassemble function '$function'" {
  55     -re "($hex) <\\+0>.*($hex) <\\+$decimal>.*int3.*($hex) <\\+$decimal>.*leave.*$gdb_prompt $" {
  56       set address_bp $expect_out(2,string)
  57       set address_after_bp $expect_out(3,string)
  58     }
  59 }]
  60
  61 if {$retcode != 0} {
  62   fail "disassemble failed, skipping entire test."
  63   return -1
  64 }
  65
  66 gdb_breakpoint "*$address_bp"
  67
  68 gdb_test "continue" "Breakpoint .*, $address_bp in $function.*" \
  69          "stop at permanent breakpoint"
  70
  71 # We want to fetch the stack pointer at the start of '$function'
  72 # function to make sure the skip_permanent_breakpoint implementation
  73 # really skips only the permanent breakpoint.  If, for whatever
  74 # reason, the 'leave' instruction executes, the stack pointer will not
  75 # have this value.
  76 set start_sp 0
  77 gdb_test_multiple "print \$sp" "fetch stack pointer value" {
  78     -re "\\\$1.*($hex).*$gdb_prompt $" {
  79       set start_sp $expect_out(1,string)
  80     }
  81 }
  82
  83 gdb_test "stepi" "$address_after_bp in $function.*" \
  84          "single-step past permanent breakpoint"
  85
  86 gdb_test "print \$sp" ".*$start_sp.*" \
  87          "stack pointer value matches"