solib-weak.exp

gdb-6.8 Linux下的调试程序 最新版本

#   Copyright 2006, 2007, 2008 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 setting breakpoints on shared library functions provided by more
# than one shared library, when one of the implementations is a "weak"
# symbol.  GDB should set a breakpoint at the first copy it finds.

if {[skip_shlib_tests]} {
    return 0
}

# These targets have shared libraries, but weak symbols are not meaningful.
if {([istarget arm*-*-symbianelf*]
     || [istarget *-*-mingw*]
     || [istarget *-*-cygwin*]
     || [istarget *-*-pe*])} {
    return 0
}

# This test uses GCC-specific syntax.
if [get_compiler_info not-used] {
    return -1
}

if {![test_compiler_info "gcc-*"]} {
    return 0
}

proc do_test { lib1opts lib2opts lib1first } {
    global objdir srcdir subdir

    set testfile "solib-weak"
    set srcfile ${testfile}.c

    set libfile1 "weaklib1"
    set libfile2 "weaklib2"
    set lib1src ${srcdir}/${subdir}/${libfile1}.c
    set lib2src ${srcdir}/${subdir}/${libfile2}.c

    # Select a unique name for this test.  Give each library and
    # executable a name reflecting its options, so that file caching
    # on the target system does not pick up the wrong file.
    set testopts ""
    if {$lib1opts == ""} {
	append testopts "lib1 nodebug, "
    } else {
	append testopts "lib1 debug, "
	append lib1 "-dbg"
    }
    if {$lib2opts == ""} {
	append testopts "lib2 nodebug, "
    } else {
	append testopts "lib2 debug, "
	append lib2 "-dbg"
    }
    if {$lib1first} {
	append testopts "lib1 first"
    } else {
	append testopts "lib2 first"
	append testfile "-lib2"
    }

    set binfile ${objdir}/${subdir}/${testfile}
    set lib1 ${objdir}/${subdir}/${libfile1}.sl
    set lib2 ${objdir}/${subdir}/${libfile2}.sl

    if $lib1first {
	set exec_opts [list debug shlib=${lib1} shlib=${lib2}]
	set expected_file ${libfile1}
    } else {
	set exec_opts [list debug shlib=${lib2} shlib=${lib1}]
	set expected_file ${libfile2}
    }

    if { [gdb_compile_shlib ${lib1src} ${lib1} ${lib1opts}] != ""
	 || [gdb_compile_shlib ${lib2src} ${lib2} ${lib2opts}] != ""
	 || [gdb_compile "${srcdir}/${subdir}/${srcfile}" ${binfile} executable $exec_opts] != ""} {
	return -1
    }

    gdb_exit
    gdb_start
    gdb_reinitialize_dir $srcdir/$subdir
    gdb_load ${binfile}
    gdb_load_shlibs $lib1 $lib2

    runto_main

    gdb_breakpoint "bar"

    # If the library which will be used is compiled without debugging
    # information, GDB will pick the wrong copy of "bar", i.e. the one
    # with debugging information.

    if {(${lib1opts} == "" && ${lib2opts} != "" && ${lib1first} == 1)
	|| (${lib1opts} != "" && ${lib2opts} == "" && ${lib1first} == 0)} {
	setup_kfail *-*-* gdb/1824
    }

    gdb_test "continue" "Breakpoint .* bar .*${expected_file}\\..*" \
	"run to breakpoint - $testopts"
}

foreach lib1opts {{} {debug}} {
    foreach lib2opts {{} {debug}} {
	foreach lib1first {1 0} {
	    do_test $lib1opts $lib2opts $lib1first
	}
    }
}