gdb/testsuite/gdb.base/access-mem-running.exp

# Copyright (C) 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/>.

# Test that we can access memory while the inferior is running.

standard_testfile

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

# The test proper.  NON_STOP indicates whether we're testing in
# non-stop, or all-stop mode.

proc test { non_stop } {
    global srcfile binfile
    global gdb_prompt
    global GDBFLAGS
    global decimal

    save_vars { GDBFLAGS } {
      append GDBFLAGS " -ex \"set non-stop $non_stop\""
      clean_restart ${binfile}
    }

    if ![runto_main] {
	return -1
    }

    # If debugging with target remote, check whether the all-stop variant
    # of the RSP is being used.  If so, we can't run the background tests.
    if {!$non_stop
	&& [target_info exists gdb_protocol]
	&& ([target_info gdb_protocol] == "remote"
	    || [target_info gdb_protocol] == "extended-remote")} {

	gdb_test_multiple "maint show target-non-stop" "" {
	    -wrap -re "(is|currently) on.*" {
	    }
	    -wrap -re "(is|currently) off.*" {
		unsupported "can't issue commands while target is running"
		return 0
	    }
	}
    }

    delete_breakpoints

    if {$non_stop == "off"} {
	set cmd "continue &"
    } else {
	set cmd "continue -a &"
    }
    gdb_test_multiple $cmd "continuing" {
	-re "Continuing\.\r\n$gdb_prompt " {
	    pass $gdb_test_name
	}
    }

    # Check we can read/write variables.

    # Check that we can read the counter variable, and that the
    # counter is increasing, meaning the process really is running.

    sleep 1
    set global_counter1 \
	[get_integer_valueof "global_counter" 0 \
	     "get global_counter once"]

    sleep 1
    set global_counter2 \
	[get_integer_valueof "global_counter" 0 \
	     "get global_counter twice"]

    gdb_assert {$global_counter1 != 0 \
		    && $global_counter2 != 0 \
		    && $global_counter1 != $global_counter2} \
	"value changed"

    # Check that we can write variables.

    gdb_test "print global_var" " = 123" \
	"print global_var before writing"
    gdb_test "print global_var = 321" " = 321" \
	"write to global_var"
    gdb_test "print global_var" " = 321" \
	"print global_var after writing"
    gdb_test "print global_var = 123" " = 123" \
	"write to global_var again"

    # Check we can set a breakpoint while the process is running.  The
    # breakpoint should hit immediately.
    set any "\[^\r\n\]*"

    gdb_test_multiple "b maybe_stop_here" "" {
	-re "Breakpoint $decimal at $any: file $any${srcfile}, line $decimal.\r\n$gdb_prompt " {
	    pass $gdb_test_name
	}
    }
    gdb_test_multiple "" "breakpoint hits" {
	-re "Breakpoint $decimal, maybe_stop_here \\(\\) at $any${srcfile}:$decimal\r\n" {
	    pass "$gdb_test_name"
	}
    }
}

foreach non_stop { "off" "on" } {
    set stop_mode [expr ($non_stop=="off")?"all-stop":"non-stop"]
    with_test_prefix "$stop_mode" {
	test $non_stop
    }
}