tests/exceptions.at

# exception.at -- test C++ exception handling with libtool  -*- Autotest -*-
#
#   Copyright (C) 2010 Free Software Foundation, Inc.
#
#   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.
####

AT_SETUP([C++ exception handling])
AT_KEYWORDS([libtool])
AT_KEYWORDS([libltdl])

: ${LTDLINCL="-I$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"

AT_DATA([module.h],
[[#include <exception>
#include <string>
class modexc : public std::exception {
public:
  modexc (std::string str) : message (str) { }
  ~modexc () throw () { }
  virtual const char *what () const throw ()
  {
    return message.c_str ();
  }
private:
  std::string message;
};
extern "C" int modfoo () throw (modexc);
]])

AT_DATA([module.cpp],
[[#include <iostream>
#include "module.h"

int modbar (void) throw (modexc)
{
  throw modexc ("exception in module");
}

extern "C"
int modfoo (void) throw (modexc)
{
  try {
    modbar ();
  }
  catch (modexc e) {
    std::cerr << "caught inside module: " << e.what () << '\n';
    throw modexc ("exception from module");
  }
  return 0;
}
]])

AT_DATA([lib.h],
[[#include <exception>
#include <string>
class libexc : public std::exception {
public:
  libexc (std::string str) : message (str) { }
  ~libexc () throw () { }
  virtual const char *what () const throw ()
  {
    return message.c_str ();
  }
private:
  std::string message;
};
int libfoo () throw (libexc);
]])

AT_DATA([lib.cpp],
[[#include <iostream>
#include "lib.h"

int libbar (void) throw (libexc)
{
  throw libexc ("exception in library");
}

int libfoo (void) throw (libexc)
{
  try {
    libbar ();
  }
  catch (libexc e) {
    std::cerr << "caught inside lib: " << e.what () << '\n';
    throw libexc ("exception from library");
  }
  return 0;
}
]])

AT_DATA([main.cpp],
[[#include <ltdl.h>
#include <cstdlib>
#include <iostream>
#include <exception>
#include <string>
#include "lib.h"
#include "module.h"

class exc : public std::exception {
public:
  exc (std::string str) : message (str) { }
  ~exc () throw () { }
  virtual const char *what () const throw ()
  {
    return message.c_str ();
  }
private:
  std::string message;
};

int foo (void) throw (exc)
{
  throw exc ("exception in program");
  return 0;
}

int exceptions_in_prog (void)
{
  std::cerr << "exceptions_in_prog\n";
  try {
    foo ();
  }
  catch (exc e) {
     std::cerr << "caught: " << e.what () << '\n';
    return 0;
  }
  return 1;
}

int exceptions_in_lib (void)
{
  std::cerr << "exceptions_in_lib\n";
  try {
    libfoo ();
  }
  catch (libexc e) {
     std::cerr << "caught: " << e.what () << '\n';
    return 0;
  }
  return 1;
}

int exceptions_in_module (void)
{
  std::cerr << "exceptions_in_module\n";

  if (lt_dlinit ())
    {
      std::cerr << "init error: " << lt_dlerror () << '\n';
      return 1;
    }

  // Some systems need RTLD_GLOBAL for exceptions to work in modules.
  lt_dladvise advise;
  if (lt_dladvise_init (&advise) || lt_dladvise_global (&advise))
    {
      std::cerr << "error setting advise global\n";
      return 1;
    }

  lt_dlhandle handle = lt_dlopenadvise ("module.la", advise);
  if (handle == NULL)
    {
      std::cerr << "dlopen failed: " << lt_dlerror () << '\n';
      return 1;
    }
  lt_dladvise_destroy (&advise);

  typedef int (*pfun) (void);
  pfun pf = (pfun) lt_dlsym (handle, "modfoo");
  if (pf == NULL)
    {
      std::cerr << "dlsym failed: " << lt_dlerror () << '\n';
      return 1;
    }

  try {
    (*pf) ();
  }
  catch (modexc e) {
    std::cerr << "caught: " << e.what () << '\n';
    if (lt_dlclose (handle))
      {
        std::cerr << "dlclose failed: " << lt_dlerror () << '\n';
	return 1;
      }
    if (lt_dlexit ())
      {
        std::cerr << "lt_dlexit failed: " << lt_dlerror () << '\n';
	return 1;
      }
    return 0;
  }
  return 1;
}

int main (void)
{
  if (exceptions_in_prog ())
    return 1;
  if (exceptions_in_lib ())
    return 1;
  if (exceptions_in_module ())
    return 1;
  return 0;
}
]])

inst=`pwd`/inst
libdir=$inst/lib
bindir=$inst/bin
moddir=$inst/mod
mkdir l m $inst $libdir $bindir $moddir

# If the C++ compiler isn't capable, don't bother.
AT_CHECK([$CXX $CPPFLAGS $CXXFLAGS -c main.cpp || exit 77], [], [ignore], [ignore])

for file in lib.cpp module.cpp; do
  AT_CHECK([$LIBTOOL --mode=compile --tag=CXX $CXX $CPPFLAGS $CXXFLAGS -c $file],
	   [], [ignore], [ignore])
done
AT_CHECK([$LIBTOOL --mode=link --tag=CXX $CXX $CXXFLAGS $LDFLAGS -o l/liba.la ]dnl
	 [lib.lo -no-undefined -version-info 1:0:0 -rpath $libdir],
	 [], [ignore], [ignore])
AT_CHECK([$LIBTOOL --mode=link --tag=CXX $CXX $CXXFLAGS $LDFLAGS -o m/module.la ]dnl
	 [module.lo -module -avoid-version -no-undefined -rpath $moddir],
	 [], [ignore], [ignore])

# We need -export-dynamic for the exception handling in modules to work.
AT_CHECK([$LIBTOOL --mode=link --tag=CXX $CXX $CXXFLAGS $LDFLAGS -o main$EXEEXT ]dnl
	 [main.$OBJEXT l/liba.la -dlopen m/module.la $LIBLTDL -export-dynamic],
	 [], [ignore], [ignore])

LT_AT_NOINST_EXEC_CHECK([./main], [-dlopen m/module.la], [], [ignore], [ignore])

AT_CHECK([$LIBTOOL --mode=install cp l/liba.la $libdir],
	 [], [ignore], [ignore])
AT_CHECK([$LIBTOOL --mode=install cp m/module.la $moddir],
	 [], [ignore], [ignore])
AT_CHECK([$LIBTOOL --mode=install cp main$EXEEXT $bindir],
	 [], [ignore], [ignore])
rm -rf l m main$EXEEXT

LTDL_LIBRARY_PATH=$moddir
export LTDL_LIBRARY_PATH
LT_AT_EXEC_CHECK([$bindir/main], [], [ignore], [ignore])

AT_CLEANUP