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target.h (targetm.cxx.use_atexit_for_cxa_atexit): New target hook.

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* target.h (targetm.cxx.use_atexit_for_cxa_atexit): New target
	hook.
	* target-def.h: (TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT): Define
	default.
	* config/i386/mingw32.h (TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT):
	Override default.
	* doc/tm.texi (TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT): Document.
	* configure.ac (use_cxa_atexit): As a special case, don't test
	for libc definition of __cxa_atexit on mingw32
	* configure: Regenerate.
	* config.gcc (i[34567]86-pc-mingw32): Default to
	enable__cxa_atexit=yes.

cp

	* decl.c (get_atexit_node): Reference atexit, not __cxa_exit.
	if targetm.cxx.use_atexit_for cxa_atexit.
	(start_cleanup_fn): Likewise.
	(register_dtor_fn): Likewise.

From-SVN: r118371
This commit is contained in:
Danny Smith 2006-11-01 06:23:12 +00:00 • committed by Danny Smith
parent d5523ce18d
commit 97388150b4
10 changed files with 70 additions and 7 deletions
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15
gcc/ChangeLog
View file

@ -1,3 +1,18 @@
2006-11-01 Danny Smith <dannysmith@users.sourceforge.net>
* target.h (targetm.cxx.use_atexit_for_cxa_atexit): New target
hook.
* target-def.h: (TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT): Define
default.
* config/i386/mingw32.h (TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT):
Override default.
* doc/tm.texi (TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT): Document.
* configure.ac (use_cxa_atexit): As a special case, don't test
for libc definition of __cxa_atexit on mingw32
* configure: Regenerate.
* config.gcc (i[34567]86-pc-mingw32): Default to
enable__cxa_atexit=yes.
2006-11-01 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* builtins.def (gamma, lgamma): Use ATTR_MATHFN_FPROUNDING_STORE.

1
gcc/config.gcc
View file

@ -1310,6 +1310,7 @@ i[34567]86-*-mingw32*)
extra_options="${extra_options} i386/cygming.opt"
extra_objs="winnt.o winnt-stubs.o"
cxx_target_objs=winnt-cxx.o
default_use_cxa_atexit=yes
case ${enable_threads} in
"" | yes | win32)
thread_file='win32'

4
gcc/config/i386/mingw32.h
View file

@ -112,3 +112,7 @@ do { \
/* mingw32 uses the -mthreads option to enable thread support. */
#undef GOMP_SELF_SPECS
#define GOMP_SELF_SPECS "%{fopenmp: -mthreads}"
/* mingw32 atexit function is safe to use in shared libraries. Use it
to register C++ static destructors. */
#define TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT hook_bool_void_true

11
gcc/configure vendored
View file

@ -12428,7 +12428,14 @@ use_cxa_atexit=no
if test x$enable___cxa_atexit = xyes || \
test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
if test x$host = x$target; then
echo "$as_me:$LINENO: checking for __cxa_atexit" >&5
case $host in
# mingw32 doesn't have __cxa_atexit but uses atexit registration
# keyed to flag_use_cxa_atexit
*-*-mingw32*)
use_cxa_atexit=yes
;;
*)
echo "$as_me:$LINENO: checking for __cxa_atexit" >&5
echo $ECHO_N "checking for __cxa_atexit... $ECHO_C" >&6
if test "${ac_cv_func___cxa_atexit+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
@ -12524,6 +12531,8 @@ else
echo "__cxa_atexit can't be enabled on this target"
fi
::
esac
else
# We can't check for __cxa_atexit when building a cross, so assume
# it is available

13
gcc/configure.ac
View file

@ -1429,8 +1429,17 @@ use_cxa_atexit=no
if test x$enable___cxa_atexit = xyes || \
test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
if test x$host = x$target; then
AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
[echo "__cxa_atexit can't be enabled on this target"])
case $host in
# mingw32 doesn't have __cxa_atexit but uses atexit registration
# keyed to flag_use_cxa_atexit
*-*-mingw32*)
use_cxa_atexit=yes
;;
*)
AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
[echo "__cxa_atexit can't be enabled on this target"])
::
esac
else
# We can't check for __cxa_atexit when building a cross, so assume
# it is available

7
gcc/cp/ChangeLog
View file

@ -1,3 +1,10 @@
2006-11-01 Danny Smith <dannysmith@users.sourceforge.net>
* decl.c (get_atexit_node): Reference atexit, not __cxa_exit.
if targetm.cxx.use_atexit_for cxa_atexit.
(start_cleanup_fn): Likewise.
(register_dtor_fn): Likewise.
2006-09-25 Geoffrey Keating <geoffk@apple.com>
* decl2.c (cp_write_global_declarations): Rename from

10
gcc/cp/decl.c
View file

@ -5348,7 +5348,7 @@ get_atexit_node (void)
if (atexit_node)
return atexit_node;
if (flag_use_cxa_atexit)
if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
{
/* The declaration for `__cxa_atexit' is:
@ -5436,6 +5436,8 @@ start_cleanup_fn (void)
tree parmtypes;
tree fntype;
tree fndecl;
bool use_cxa_atexit = flag_use_cxa_atexit
&& !targetm.cxx.use_atexit_for_cxa_atexit ();
push_to_top_level ();
@ -5448,7 +5450,7 @@ start_cleanup_fn (void)
We'll just ignore it. After we implement the new calling
convention for destructors, we can eliminate the use of
additional cleanup functions entirely in the -fnew-abi case. */
if (flag_use_cxa_atexit)
if (use_cxa_atexit)
parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
/* Build the function type itself. */
fntype = build_function_type (void_type_node, parmtypes);
@ -5468,7 +5470,7 @@ start_cleanup_fn (void)
DECL_DECLARED_INLINE_P (fndecl) = 1;
DECL_INTERFACE_KNOWN (fndecl) = 1;
/* Build the parameter. */
if (flag_use_cxa_atexit)
if (use_cxa_atexit)
{
tree parmdecl;
@ -5537,7 +5539,7 @@ register_dtor_fn (tree decl)
cxx_mark_addressable (cleanup);
mark_used (cleanup);
cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
if (flag_use_cxa_atexit)
if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
{
args = tree_cons (NULL_TREE,
build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),

8
gcc/doc/tm.texi
View file

@ -8971,6 +8971,14 @@ should be used to register static destructors when @option{-fuse-cxa-atexit}
is in effect. The default is to return false to use @code{__cxa_atexit}.
@end deftypefn
@deftypefn {Target Hook} bool TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT (void)
This hook returns true if the target @code{atexit} function can be used
in the same manner as @code{__cxa_atexit} to register C++ static
destructors. This requires that @code{atexit}-registered functions in
shared libraries are run in the correct order when the libraries are
unloaded. The default is to return false.
@end deftypefn
@deftypefn {Target Hook} void TARGET_CXX_ADJUST_CLASS_AT_DEFINITION (tree @var{type})
@var{type} is a C++ class (i.e., RECORD_TYPE or UNION_TYPE) that has just been
defined. Use this hook to make adjustments to the class (eg, tweak

5
gcc/target-def.h
View file

@ -583,6 +583,10 @@ Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#define TARGET_CXX_USE_AEABI_ATEXIT hook_bool_void_false
#endif
#ifndef TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT
#define TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT hook_bool_void_false
#endif
#ifndef TARGET_CXX_ADJUST_CLASS_AT_DEFINITION
#define TARGET_CXX_ADJUST_CLASS_AT_DEFINITION hook_void_tree
#endif
@ -599,6 +603,7 @@ Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
TARGET_CXX_DETERMINE_CLASS_DATA_VISIBILITY, \
TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT, \
TARGET_CXX_USE_AEABI_ATEXIT, \
TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT, \
TARGET_CXX_ADJUST_CLASS_AT_DEFINITION \
}

3
gcc/target.h
View file

@ -776,6 +776,9 @@ struct gcc_target
/* Returns true if __aeabi_atexit should be used to register static
destructors. */
bool (*use_aeabi_atexit) (void);
/* Returns true if target may use atexit in the same manner as
__cxa_atexit to register static destructors. */
bool (*use_atexit_for_cxa_atexit) (void);
/* TYPE is a C++ class (i.e., RECORD_TYPE or UNION_TYPE) that
has just been defined. Use this hook to make adjustments to the
class (eg, tweak visibility or perform any other required