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# Copyright 2014-2021 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
standard_testfile
if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
return -1
}
# Set a watchpoint watching EXPR.
proc watch { expr } {
global decimal
set expr_re [string_to_regexp $expr]
gdb_test "watch $expr" \
"\(Hardware \)?\[Ww\]atchpoint $decimal: $expr_re"
}
# Continue inferior execution, expecting the watchpoint EXPR to be triggered
# having old value OLD and new value NEW.
proc expect_watchpoint { expr old new } {
with_test_prefix "$expr: $old->$new" {
set expr_re [string_to_regexp $expr]
gdb_test "print $expr" "\\$\\d+ = $old\\s" "print expression before"
gdb_test "continue" "$expr_re\\s.*Old value = $old\\s+New value = $new\\s.*"
gdb_test "print $expr" "\\$\\d+ = $new\\s" "print expression after"
}
}
# Check that -location watchpoints against bitfields trigger properly.
proc test_watch_location {} {
with_test_prefix "-location watch against bitfields" {
if {![runto_main]} {
return -1
}
watch "-location q.a"
watch "-location q.e"
expect_watchpoint "q.a" 0 1
expect_watchpoint "q.e" 0 5
expect_watchpoint "q.a" 1 0
expect_watchpoint "q.e" 5 4
# It'll execute a large amount of code with software watchpoint
# enabled, which means GDB will single stepping all the way
# through til the inferior exits. Increase the timeout by a
# factor of 4.
with_timeout_factor 4 {
gdb_continue_to_end
}
}
}
# Check that regular watchpoints against expressions involving
# bitfields trigger properly.
proc test_regular_watch {} {
with_test_prefix "regular watch against bitfields" {
if {![runto_main]} {
return -1
}
watch "q.d + q.f + q.g"
expect_watchpoint "q.d + q.f + q.g" 0 4
expect_watchpoint "q.d + q.f + q.g" 4 10
expect_watchpoint "q.d + q.f + q.g" 10 3
expect_watchpoint "q.d + q.f + q.g" 3 2
expect_watchpoint "q.d + q.f + q.g" 2 1
expect_watchpoint "q.d + q.f + q.g" 1 0
# It'll execute a large amount of code with software watchpoint
# enabled, which means GDB will single stepping all the way
# through til the inferior exits. Increase the timeout by a
# factor of 4.
with_timeout_factor 4 {
gdb_continue_to_end
}
}
}
# Disable hardware watchpoints if the target does not support them.
if [target_info exists gdb,no_hardware_watchpoints] {
gdb_test_no_output "set can-use-hw-watchpoints 0"
}
test_watch_location
test_regular_watch
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