gdb/testsuite/gdb.base/dprintf-execution-x-script.exp

# Copyright 2021-2022 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 commands in a GDB script file run via GDB's -x flag work
# as expected.  Specifically, the script creates a dprintf breakpoint
# as well as a normal breakpoint that has "continue" in its command
# list, and then does "run".  Correct output from GDB is checked as
# part of this test.

# Bail out if the target can't use the 'run' command.
if ![target_can_use_run_cmd] {
    return 0
}

standard_testfile

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

# This is the name of the GDB script to load.
set x_file ${srcdir}/${subdir}/$testfile.gdb

# Create context in which the global, GDBFLAGS, will be restored at
# the end of the block.  All commands run within the block are
# actually run in the outer context.  (This is why 'res' is available
# outside of the save_vars block.)
save_vars { GDBFLAGS } {
    # Set flags with which to start GDB.
    append GDBFLAGS " -ex \"set height unlimited\""
    append GDBFLAGS " -x \"$x_file\""
    append GDBFLAGS " --args \"$binfile\""

    # Start GDB with above flags.
    set res [gdb_spawn]
}

set test "load and run script with -x"
if { $res != 0} {
    fail $test
    return -1
}

# The script loaded via -x contains a run command; while running, GDB
# is expected to print three messages from dprintf breakpoints along
# with three interspersed messages from an ordinary breakpoint (which
# was set up with a continue command).  Set up pattern D to match
# output from hitting the dprintf breakpoint and B for the ordinary
# breakpoint.  Then set PAT to contain the entire pattern of expected
# output from the interspersed dprintf and ordinary breakpoints along
# with some (additional) expected output from the dprintf breakpoints,
# i.e. 0, 1, and 2.
set d "dprintf in increment.., vi="
set b "Breakpoint ., inc_vi"
set pat "${d}0.*?$b.*?${d}1.*?$b.*?${d}2.*?$b.*?"

proc do_test {cmd test} {
    gdb_test_multiple $cmd $test {
	-re "$::pat$::inferior_exited_re normally.*$::gdb_prompt $" {
	    pass $test
	}
	-re "Don't know how to run.*$::gdb_prompt $" {
	    # Even though we bailed out at the beginning of this test case
	    # for targets which can't use the "run" command, there are
	    # still targets, e.g. native-extended-gdbserver, which can
	    # run, but will still print the "Don't know how to run"
	    # message.  In the case of native-extended-gdbserver, it would
	    # first need to connect to the target in order to run.  For
	    # that particular target, the very first test which attempts
	    # to use the "run" command from a command line script is
	    # the one that is unsupported.  The other two tests will
	    # pass because, after reaching the (gdb) prompt, a gdbserver
	    # is spawned and then connected to.  (The command line which
	    # spawns GDB for this target has a "-iex set
	    # auto-connect-native-target off" which prevents it from
	    # attempting to "run" using the native target.)
	    unsupported $test
	}
    }
}

# Check output from running script with -x
do_test "" $test

# Restart GDB and 'source' the script; this will (still) run the program
# due to the 'run' command in the script.
clean_restart $binfile
do_test "source $x_file" "load and run script using source command"

# This should leave us at the gdb prompt; Run program again using
# already established breakpoints, i.e. those loaded from the
# script.  Prior to fixing PR 28308, this was the only test that
# would pass.
do_test "run" "run again"