gdb/testsuite/gdb.base/print-file-var.exp

# Copyright 2012-2020 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_shlib_tests]} {
    return -1
}

proc test {hidden dlopen version_id_main lang} {
    global srcdir subdir

    set main "print-file-var-main"

    set suffix "-hidden$hidden-dlopen$dlopen-version_id_main$version_id_main"

    # Normally we place different builds (C/C++) of a test into
    # subdirectories within the test build directory, however, using
    # gdb_load_shlib doesn't work well with this approach, so instead
    # add a language specific suffix to the binary and library names.
    if { $lang == "c" } {
	set suffix "${suffix}_c"
    } else {
	set suffix "${suffix}_cpp"
    }

    set executable $main$suffix

    set lib1 "print-file-var-lib1"
    set lib2 "print-file-var-lib2"

    set libobj1 [standard_output_file ${lib1}$suffix.so]
    set libobj2 [standard_output_file ${lib2}$suffix.so]

    set lib_opts { debug additional_flags=-fPIC $lang }
    lappend lib_opts "additional_flags=-DHIDDEN=$hidden"

    if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib1}.c \
	      ${libobj1} \
	      ${lib_opts} ] != "" } {
	return -1
    }
    if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib2}.c \
	      ${libobj2} \
	      ${lib_opts} ] != "" } {
	return -1
    }

    set main_opts [list debug shlib=${libobj1} $lang]

    if {$dlopen} {
	lappend main_opts "shlib_load" \
	    "additional_flags=-DSHLIB_NAME=\"$libobj2\""
    } else {
	lappend main_opts "shlib=${libobj2}"
    }

    lappend main_opts "additional_flags=-DVERSION_ID_MAIN=$version_id_main"

    if { [gdb_compile "${srcdir}/${subdir}/${main}.c" \
	      [standard_output_file ${executable}] \
	      executable \
	      $main_opts]
	 != ""} {
	return -1
    }

    clean_restart $executable
    gdb_load_shlib $libobj1
    gdb_load_shlib $libobj2

    if ![runto_main] {
	untested "could not run to main"
	return -1
    }

    # Try printing "this_version_num" qualified with the name of the file
    # where the variables are defined.  There are three global variables
    # with that name, and some systems such as GNU/Linux merge them
    # into one single entity, while some other systems such as Windows
    # keep them separate.  In the first situation, we have to verify
    # that GDB does not randomly select the wrong instance, even when
    # a specific filename is used to qualified the lookup.  And in the
    # second case, we have to verify that GDB does select the instance
    # defined in the given filename.
    #
    # To avoid adding target-specific code in this testcase, the program
    # sets three local variables named 'vm', 'v1' and 'v2' with the value of
    # our global variables.  This allows us to compare the value that
    # GDB returns for each query against the actual value seen by
    # the program itself.

    # Get past the initialization of the v* variables.

    set bp_location \
	[gdb_get_line_number "STOP" "${main}.c"]
    gdb_test "break $main.c:$bp_location" \
	"Breakpoint \[0-9\]+ at 0x\[0-9a-fA-F\]+: .*" \
	"breapoint at STOP marker"

    gdb_test "continue" \
	"Breakpoint \[0-9\]+, main \\(\\) at.*STOP.*" \
	"continue to STOP marker"

    # Now check the value of this_version_id in all of
    # print-file-var-main.c, print-file-var-lib1.c and
    # print-file-var-lib2.c.

    # Compare the values of $sym1 and $sym2.
    proc compare {sym1 sym2} {
	with_test_prefix "sym1=$sym1,sym2=$sym2" {
	    # Done this way instead of comparing the symbols with "print $sym1
	    # == sym2" in GDB directly so that the values of the symbols end
	    # up visible in the logs, for debug purposes.
	    set vsym1 [get_integer_valueof $sym1 -1]
	    set vsym2 [get_integer_valueof $sym2 -1]
	    gdb_assert {$vsym1 == $vsym2} "$sym1 == $sym2"
	}
    }

    if $version_id_main {
	compare "'print-file-var-main.c'::this_version_id" "vm"
	compare "this_version_id" "vm"
    }

    compare "'print-file-var-lib1.c'::this_version_id" "v1"
    compare "'print-file-var-lib2.c'::this_version_id" "v2"
}

# Only test C++ if we are able.  Always use C.
if { [skip_cplus_tests] || [get_compiler_info "c++"] } {
    set lang_list {c}
} else {
    set lang_list {c c++}
}

foreach_with_prefix lang $lang_list {
    foreach_with_prefix hidden {0 1} {
	foreach_with_prefix dlopen {0 1} {
	    foreach_with_prefix version_id_main {0 1} {
		test $hidden $dlopen $version_id_main $lang
	    }
	}
    }
}