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# Copyright 2014-2020 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/>.
if {[skip_hw_breakpoint_tests]} {
return 0
}
standard_testfile
if {[prepare_for_testing "failed to prepare" ${testfile} ${srcfile}]} {
return -1
}
if ![runto_main] {
fail "can't run to main"
return -1
}
# If we can read the memory at address 0, skip the test.
if { [is_address_zero_readable] } {
untested "memory at address 0 is readable"
return
}
delete_breakpoints
# Test whether the target supports hardware breakpoints at all.
set supports_hbreak 0
set test "probe hardware breakpoint support"
gdb_test_multiple "hbreak main" $test {
-re "No hardware breakpoint support in the target.*$gdb_prompt $" {
pass $test
}
-re "Hardware breakpoints used exceeds limit.*$gdb_prompt $" {
pass $test
}
-re "Hardware assisted breakpoint.*at.* file .*$srcfile, line.*$gdb_prompt $" {
set supports_hbreak 1
pass $test
}
}
if {!$supports_hbreak} {
unsupported "hardware breakpoints"
return
}
delete_breakpoints
# Force immediate breakpoint insertion.
gdb_test_no_output "set breakpoint always-inserted on"
# Hardware breakpoints are implemented using a mechanism that is not
# dependent on being able to modify the target's memory, we should be
# able to set them even in unmapped memory areas.
gdb_test "hbreak *0" "Hardware assisted breakpoint \[0-9\]+ at 0x0"
gdb_test "info break" "hw breakpoint.*y.*0x0\+\[ \t\]\+" \
"info break shows hw breakpoint"
gdb_test_no_output "delete \$bpnum" "" "delete" \
"delete hw breakpoint"
gdb_test "info break" "No breakpoints or watchpoints\." \
"info break shows no breakpoints"
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