gdb/testsuite/gdb.base/cond-eval-mode.exp

#   Copyright 2012-2025 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/>.

# Test 'set breakpoint condition-evaluation' settings

# The allow_hw_watchpoint_tests checks if watchpoints are supported by the
# processor.  On PowerPC, the check runs a small test program under gdb
# to determine if the Power processor supports HW watchpoints.  The check
# must be done before starting the test so as to not disrupt the execution
# of the actual test.

set allow_hw_watchpoint_tests_p [allow_hw_watchpoint_tests]

standard_testfile

if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
    return -1
}

if {![runto_main]} {
    return 0
}

set test_host "set breakpoint condition-evaluation host"
set test_auto "set breakpoint condition-evaluation auto"
set test_target "set breakpoint condition-evaluation target"

gdb_test_no_output $test_host
gdb_test_no_output $test_auto

# If target-side condition evaluation is not supported, this warning will be
# displayed.
set warning "warning: Target does not support breakpoint condition evaluation.\r\nUsing host evaluation mode instead."

gdb_test_multiple $test_target $test_target {
    -re "$warning\r\n$gdb_prompt $" {
	unsupported $test_target
	return -1
    }

    -re "^$test_target\r\n$gdb_prompt $" {
	pass $test_target
    }
}

# We now know that the target supports target-side conditional
# evaluation.  Now make sure we can force-disable the
# ConditionalBreakpoints RSP feature.
if [gdb_protocol_is_remote] {
    gdb_test \
	"set remote conditional-breakpoints-packet off" \
	"Support for the 'ConditionalBreakpoints' packet on the current remote target is set to \"off\"."

    gdb_test $test_target "$warning" \
	"set breakpoint condition-evaluation target, with support disabled"

    # Confirm we can re-enable it.
    gdb_test \
	"set remote conditional-breakpoints-packet on" \
	"Support for the 'ConditionalBreakpoints' packet on the current remote target is set to \"on\"."

    gdb_test_no_output $test_target "restore $test_target"
}

# Test setting a condition in a breakpoint.  BREAK_COMMAND is the
# break/hwatch command to test.
#
proc test_break { break_command } {
    global gdb_prompt

    with_test_prefix "$break_command" {
	delete_breakpoints

	with_test_prefix "true condition" {
	    gdb_test "$break_command foo" "reakpoint.* at .*"

	    # A condition that evals true.
	    gdb_test "condition \$bpnum cond_global==0" ".*"

	    set can_do_cmd 0

	    set test "continue"
	    gdb_test_multiple $test $test {
		-re "You may have requested too many.*$gdb_prompt $" {
		    pass $test
		}
		-re "Breakpoint .*, foo .*$gdb_prompt $" {
		    pass $test
		    set can_do_cmd 1
		}
	    }

	    if { !$can_do_cmd } {
		unsupported "no target support"
		return
	    }
	}

	with_test_prefix "false condition" {
	    delete_breakpoints

	    gdb_test "$break_command foo" ".*reakpoint .* at .*"

	    # A condition that evals false.
	    gdb_test "condition \$bpnum cond_global==1" ".*"

	    gdb_test "b bar" "Breakpoint .* at .*"

	    gdb_test "continue" "Breakpoint .*, bar .*"
	}
    }
}

# Test setting conditions in watchpoints.  WATCH_COMMAND is the watch
# command to test.
#
proc test_watch { watch_command } {
    global gdb_prompt
    global allow_hw_watchpoint_tests_p

    with_test_prefix "$watch_command" {
	if {!$allow_hw_watchpoint_tests_p} {
	    unsupported "no target support"
	    return
	}

	with_test_prefix "true condition" {
	    delete_breakpoints

	    gdb_test "$watch_command global" ".*atchpoint .*: global.*"

	    # A condition that evals true.
	    gdb_test "condition \$bpnum cond_global==0" ".*"

	    set can_do_cmd 0

	    set test "continue"
	    gdb_test_multiple $test $test {
		-re "You may have requested too many.*$gdb_prompt $" {
		    pass $test
		}
		-re "atchpoint .*: global.*$gdb_prompt $" {
		    pass $test
		    set can_do_cmd 1
		}
	    }

	    if { !$can_do_cmd } {
		unsupported "no target support"
		return
	    }
	}

	with_test_prefix "false condition" {
	    delete_breakpoints

	    gdb_test "$watch_command global" ".*atchpoint .*: global.*"

	    # A condition that evals false.
	    gdb_test "condition \$bpnum cond_global==1" ".*"

	    gdb_test "b bar" "Breakpoint .* at .*"

	    gdb_test "continue" "Breakpoint .*, bar .*"
	}
    }
}

foreach break_command { "break" "hbreak" } {
    test_break $break_command
}

foreach watch_command { "watch" "rwatch" "awatch" } {
    test_watch $watch_command
}