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

# Copyright (C) 2008-2021 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


# This file is part of the gdb testsuite.

# Test stepping over permanent breakpoints on i386.

if { ![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"] } then {
    verbose "Skipping skip over permanent breakpoint on i386 tests."
    return
}

standard_testfile

# some targets have leading underscores on assembly symbols.
set additional_flags [gdb_target_symbol_prefix_flags]

# Don't use "debug", so that we don't have line information for the assembly
# fragments.
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list $additional_flags]] != "" } {
    untested "failed to compile"
    return -1
}


gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

#
# Run to `main' where we begin our tests.
#

if ![runto_main] then {
  return -1
}

set function "standard"

set retcode [gdb_test_multiple "disassemble $function" "disassemble function '$function'" {
    -re "($hex) <\\+0>.*($hex) <\\+$decimal>.*int3.*($hex) <\\+$decimal>.*leave.*$gdb_prompt $" {
      set address_bp $expect_out(2,string)
      set address_after_bp $expect_out(3,string)
    }
}]

if {$retcode != 0} {
  fail "disassemble failed, skipping entire test."
  return -1
}

gdb_breakpoint "*$address_bp"

gdb_test "continue" "Breakpoint .*, $address_bp in $function.*" \
	 "stop at permanent breakpoint"

# We want to fetch the stack pointer at the start of '$function'
# function to make sure the skip_permanent_breakpoint implementation
# really skips only the permanent breakpoint.  If, for whatever
# reason, the 'leave' instruction executes, the stack pointer will not
# have this value.
set start_sp 0
gdb_test_multiple "print \$sp" "fetch stack pointer value" {
    -re "\\\$1.*($hex).*$gdb_prompt $" {
      set start_sp $expect_out(1,string)
    }
}

gdb_test "stepi" "$address_after_bp in $function.*" \
	 "single-step past permanent breakpoint"

gdb_test "print \$sp" ".*$start_sp.*" \
	 "stack pointer value matches"