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

# Copyright 2012-2018 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
}

set executable print-file-var-main

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

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

set lib_opts { debug additional_flags=-fPIC }

if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib1}.c \
                        ${libobj1} \
                        ${lib_opts} ] != "" } {
    return -1
}
if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib2}.c \
                        ${libobj2} \
                        ${lib_opts} ] != "" } {
    return -1
}
if { [gdb_compile "${srcdir}/${subdir}/${executable}.c" \
                  [standard_output_file ${executable}] \
                  executable \
                  [list debug shlib=${libobj1} shlib=${libobj2}]]
     != ""} {
    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 two 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 two local variable named '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 variables 'v1' and 'v2'.

set bp_location \
    [gdb_get_line_number "STOP" "${executable}.c"]
gdb_test "break $executable.c:$bp_location" \
         "Breakpoint \[0-9\]+ at 0x\[0-9a-fA-F\]+: .*" \
         "breapoint past v1 & v2 initialization"

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

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

gdb_test "print 'print-file-var-lib1.c'::this_version_id == v1" \
         " = 1"

gdb_test "print 'print-file-var-lib2.c'::this_version_id == v2" \
         " = 1"