libtool/tests/lt_dladvise.at

# lt_dladvise.at -- test libltdl functionality                -*- Autotest -*-
#
#   Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
#   Written by Gary V. Vaughan, 2007
#
#   This file is part of GNU Libtool.
#
# GNU Libtool 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 2 of
# the License, or (at your option) any later version.
#
# GNU Libtool 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 GNU Libtool; see the file COPYING.  If not, a copy
# can be downloaded from  http://www.gnu.org/licenses/gpl.html,
# or obtained by writing to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
####

# Try to keep the new interfaces of HEAD separate from those of
# branch-1-5 to facilitate testing of older releases.

AT_SETUP([lt_dlopenadvise library loading])
AT_KEYWORDS([libltdl])

AT_DATA([main.c],
[[#include <ltdl.h>
#include <stdio.h>

typedef int funcp (int);

static int errors = 0;

static void
complain (const char *msg)
{
  const char *errmsg = lt_dlerror ();
  fprintf (stderr, "%s", msg);
  if (errmsg)
    fprintf (stderr, ": %s\n", errmsg);
  else
    fprintf (stderr, ".\n");
  ++errors;
}

static lt_dlhandle
moduleopen (const char *filename, lt_dladvise advise)
{
  lt_dlhandle handle;

  handle = lt_dlopenadvise (filename, advise);
  if (!handle)
    {
      fprintf (stderr, "can't open the module %s!\n", filename);
      complain ("error was");
    }

  return handle;
}

static int
moduletest (lt_dlhandle handle, const char *fname, const char *vname)
{
  funcp *f = (funcp *) lt_dlsym (handle, fname);
  int   *v = (int *)   lt_dlsym (handle, vname);

  if (!f)
    {
      fprintf (stderr, "function `%s' not found\n", fname);
      ++errors;
      return -1;
    }
  if (!v)
    {
      fprintf (stderr, "variable `%s' not found\n", vname);
      ++errors;
      return -1;
    }
  return f (*v);
}

void
hint_ext (void)
{
  lt_dlhandle handle;
  lt_dladvise advise;

  if (lt_dladvise_init (&advise) || lt_dladvise_ext (&advise))
    complain ("error setting advise ext");

  handle = moduleopen ("libdepend", advise);

  if (handle)
    printf ("depend: %d\n", moduletest (handle, "g", "j"));

  lt_dladvise_destroy (&advise);
}

void
hint_resident (void)
{
  const lt_dlinfo *info;
  lt_dlhandle handle;
  lt_dladvise advise;

  if (lt_dladvise_init (&advise) || lt_dladvise_resident (&advise))
    complain ("error setting advise resident");

  handle = moduleopen ("libresident.la", advise);

  if (handle)
    {
      info = lt_dlgetinfo (handle);
      if (!info->is_resident)
	complain ("error taking advise resident");

      /* cannot close resident modules */
      if (lt_dlclose (handle) == 0)
	complain ("successfully unloaded resident module");

      printf ("resident: %d\n", moduletest (handle, "func", "numb"));
    }

  lt_dladvise_destroy (&advise);
}

void
hint_local (void)
{
  const lt_dlinfo *info;
  lt_dlhandle handle;
  lt_dladvise advise;

  if (lt_dladvise_init (&advise) || lt_dladvise_local (&advise))
    complain ("error setting advise local");

  handle = moduleopen ("liblocal.la", advise);

  if (handle)
    {
      info = lt_dlgetinfo (handle);
      printf ("local: %d\n", moduletest (handle, "f", "i"));

      /* If the symlocal hint was taken, don't unload this module
         and test that our local symbolnames won't clash with modglobal.  */
      if (!info->is_symlocal && lt_dlclose (handle))
	complain ("error unloading modlocal");
    }

  lt_dladvise_destroy (&advise);
}

void
hint_global (void)
{
  const lt_dlinfo *info;
  lt_dlhandle handle;
  lt_dladvise advise;

  if (lt_dladvise_init (&advise) || lt_dladvise_global (&advise))
    complain ("error setting advise global");

  handle = moduleopen ("libglobal.la", advise);

  if (handle)
    {
      info = lt_dlgetinfo (handle);
      printf ("global: %d\n", moduletest (handle, "f", "i"));

      /* Don't attempt to load moddepend unless modglobal was successfully
         loaded and the symglobal hint was taken, and the system allows to
 	 to have undefined symbols.  */
      if (info && info->is_symglobal && HAVE_UNDEFINED_SYMBOLS)
        {
          hint_ext ();
        }
      else
        {
          /* Fake the output so the test won't fail when using a dlloader
             unable to take symglobal hints.  */
          printf ("depend: 5\n");
        }
    }

  lt_dladvise_destroy (&advise);
}

void
hint_preload (void)
{
  lt_dlhandle handle;
  lt_dladvise advise;

  if (lt_dladvise_init (&advise) || lt_dladvise_preload (&advise))
    complain ("error setting advise preload");

  handle = moduleopen ("libpreload.la", advise);

  if (handle)
    {
      printf("preload: %d\n", moduletest (handle, "h", "k"));
    }

  lt_dladvise_destroy (&advise);
}

int
main (void)
{

  LTDL_SET_PRELOADED_SYMBOLS();

  if (lt_dlinit() != 0)
    {
      fprintf (stderr, "error during initialization: %s\n", lt_dlerror());
      return 1;
    }

  hint_resident ();
  hint_local ();
  hint_global ();
  hint_preload ();

  if (lt_dlexit () != 0)
    complain ("error during exit");

  return (errors != 0);
}
]])

AT_DATA([modresident.c],
[[#ifdef __cplusplus
extern "C" {
#endif
int func (int x) { return x / 3; }
int numb = 7;
#ifdef __cplusplus
}
#endif
]])

AT_DATA([modlocal.c],
[[#ifdef __cplusplus
extern "C" {
#endif
int f (int x) { return (x * x) / 10; }
int i = 6;
#ifdef __cplusplus
}
#endif
]])

AT_DATA([modglobal.c],
[[#ifdef __cplusplus
extern "C" {
#endif
int f (int x) { return x - 1; }
int i = 5;
#ifdef __cplusplus
}
#endif
]])

AT_DATA([moddepend.c],
[[#ifdef __cplusplus
extern "C" {
#endif
extern int f (int), i;
int g (int x) { return f (i) + x - 3; }
int j = 4;
#ifdef __cplusplus
}
#endif
]])

AT_DATA([modpreload.c],
[[#ifdef __cplusplus
extern "C" {
#endif
int h (int x) { return 2 * x; }
int k = 3;
#ifdef __cplusplus
}
#endif
]])

LT_AT_HOST_DATA([expout],
[[resident: 2
local: 3
global: 4
depend: 5
preload: 6
]])

: ${LTDLINCL="-I$abs_top_srcdir/libltdl"}
: ${LIBLTDL="$abs_builddir/../libltdl/libltdlc.la"}

# Skip this test when called from:
#    make distcheck DISTCHECK_CONFIGURE_FLAGS=--disable-ltdl-install
AT_CHECK([case $LIBLTDL in #(
 */_inst/lib/*) test -f $LIBLTDL || (exit 77) ;;
esac], [], [ignore])

CPPFLAGS="$LTDLINCL $CPPFLAGS"

dlopenable='resident local global'
dlpreloadable='preload'

# ------------------------------------------------------------------------- #
# The depend test makes no sense unless compiled without -no-undefined. By  #
# not building the depend module in that case, when this test passes we can #
# be sure that hint_global() above, is being correctly informed those hosts #
# are reporting not able to accept the global hint to lt_dlopenadvise().    #
# ------------------------------------------------------------------------- #

have_shared=false
$LIBTOOL --features | grep 'enable shared libraries' >/dev/null && have_shared=:

case $host_os,$have_shared in
cygwin* | mingw* | cegcc* | *,false)
  # These hosts do not support linking without -no-undefined
  CPPFLAGS="$CPPFLAGS -DHAVE_UNDEFINED_SYMBOLS=0"
  ;;
*)
  CPPFLAGS="$CPPFLAGS -DHAVE_UNDEFINED_SYMBOLS=1"
  dlopenable="$dlopen depend"
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c moddepend.c
  AT_CHECK([$LIBTOOL --mode=link $CC -module $CFLAGS $LDFLAGS -o libdepend.la ]dnl
           [moddepend.lo -rpath /foo -avoid-version], [], [ignore], [ignore])
  ;;
esac

# ------------------------------------------------------------------------- #
# Other modules can be tested correctly even when built with -no-undefined. #
# ------------------------------------------------------------------------- #

LDFLAGS="$LDFLAGS -no-undefined"

$CC $CPPFLAGS $CFLAGS -c main.c
for name in resident local global preload; do
  # FIXME: adding -static to libpreload shouldn't be necessary.
  #        Fix this properly in ltmain, then remove this workaround.
  if test $name = preload; then
    st=-static
  else
    st=
  fi
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c mod$name.c
  AT_CHECK([$LIBTOOL --mode=link $CC -module $CFLAGS $LDFLAGS -o lib$name.la ]dnl
           [mod$name.lo $st -rpath /foo -avoid-version], [], [ignore], [ignore])
done

preloaded=
for module in $dlpreloadable; do
  preloaded="${preloaded+$preloaded }-dlpreopen lib$module.la"
done

modules=
for module in $dlopenable; do
  modules="${modules+$modules }-dlopen lib$module.la"
done

AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o main$EXEEXT main.$OBJEXT $preloaded $modules $LIBLTDL],
	 [], [ignore], [ignore])

# Remove loadable libpreload module, so we know it is the preloaded module
# that is being executed by a successful test invocation:
AT_CHECK([$LIBTOOL --mode=clean rm -f libpreload.la], [], [ignore], [ignore])

LT_AT_NOINST_EXEC_CHECK([./main], [$modules], [], [expout], [])

AT_CLEANUP