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* [Bug c++/50270] New: Some symbols are exported even when -fvisibility=hidden is used
@ 2011-09-01 19:54 almeidaraf at gmail dot com
2011-09-01 19:57 ` [Bug c++/50270] " almeidaraf at gmail dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: almeidaraf at gmail dot com @ 2011-09-01 19:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50270
Bug #: 50270
Summary: Some symbols are exported even when
-fvisibility=hidden is used
Classification: Unclassified
Product: gcc
Version: 4.4.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: almeidaraf@gmail.com
Created attachment 25169
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25169
Output of gcc -E -fvisibility=hidden -fvisibility-inlines-hidden -fPIC -Wall
-Wextra -shared foo.c
When I compile foo.cc with the following command:
$gcc -fvisibility=hidden -fvisibility-inlines-hidden -fPIC -Wall -Wextra
-shared foo.cc -olibfoo.so
There are still quite a few exported symbols. For instance:
_ZNSt6vectorI3FooSaIS0_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS0_S2_EERKS0_
which should not be exported. This is what objdump -T displays:
00000000000023b2 w DF .text 00000000000002d2 Base
_ZNSt6vectorI3FooSaIS0_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS0_S2_EERKS0_
In readelf -s it comes out in .dynsym as:
62: 00000000000023b2 722 FUNC WEAK DEFAULT 12
_ZNSt6vectorI3FooSaIS0_EE
To my understanding my shared library shouldn't be exporting any symbols.
$gcc -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.4.3-4ubuntu5'
--with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--enable-multiarch --enable-linker-build-id --with-system-zlib
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug --enable-plugin --enable-objc-gc
--disable-werror --with-arch-32=i486 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5)
$lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.04.3 LTS
Release: 10.04
Codename: lucid
I could not add more than one attachment, so I added gcc -E output as an
attachment and foo.cc code goes here:
#include <vector>
class __attribute__ ((visibility ("hidden"))) Foo {
public:
int m() {
return 0;
}
};
int main(void) {
std::vector<Foo> v;
v.push_back(Foo());
return 0;
}
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50270] Some symbols are exported even when -fvisibility=hidden is used
2011-09-01 19:54 [Bug c++/50270] New: Some symbols are exported even when -fvisibility=hidden is used almeidaraf at gmail dot com
@ 2011-09-01 19:57 ` almeidaraf at gmail dot com
2011-09-01 19:58 ` almeidaraf at gmail dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: almeidaraf at gmail dot com @ 2011-09-01 19:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50270
--- Comment #1 from Rafael Almeida <almeidaraf at gmail dot com> 2011-09-01 19:57:04 UTC ---
Created attachment 25170
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25170
Preprocessed file generated by -save-temps
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50270] Some symbols are exported even when -fvisibility=hidden is used
2011-09-01 19:54 [Bug c++/50270] New: Some symbols are exported even when -fvisibility=hidden is used almeidaraf at gmail dot com
2011-09-01 19:57 ` [Bug c++/50270] " almeidaraf at gmail dot com
@ 2011-09-01 19:58 ` almeidaraf at gmail dot com
2011-09-01 19:59 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: almeidaraf at gmail dot com @ 2011-09-01 19:58 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50270
--- Comment #2 from Rafael Almeida <almeidaraf at gmail dot com> 2011-09-01 19:57:50 UTC ---
Created attachment 25171
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25171
foo.s generated by -save-temps
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50270] Some symbols are exported even when -fvisibility=hidden is used
2011-09-01 19:54 [Bug c++/50270] New: Some symbols are exported even when -fvisibility=hidden is used almeidaraf at gmail dot com
` (2 preceding siblings ...)
2011-09-01 19:59 ` pinskia at gcc dot gnu.org
@ 2011-09-01 19:59 ` almeidaraf at gmail dot com
2011-09-02 9:32 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: almeidaraf at gmail dot com @ 2011-09-01 19:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50270
--- Comment #3 from Rafael Almeida <almeidaraf at gmail dot com> 2011-09-01 19:58:45 UTC ---
Created attachment 25172
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25172
Output of -save-temps -v
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50270] Some symbols are exported even when -fvisibility=hidden is used
2011-09-01 19:54 [Bug c++/50270] New: Some symbols are exported even when -fvisibility=hidden is used almeidaraf at gmail dot com
2011-09-01 19:57 ` [Bug c++/50270] " almeidaraf at gmail dot com
2011-09-01 19:58 ` almeidaraf at gmail dot com
@ 2011-09-01 19:59 ` pinskia at gcc dot gnu.org
2011-09-01 19:59 ` almeidaraf at gmail dot com
2011-09-02 9:32 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2011-09-01 19:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50270
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-09-01 19:59:18 UTC ---
Small testcase:
template <class a> class __attribute__ ((visibility ("default"))) vector {
public:
vector(){t=2;};
void push_back(a){t++;};
int t;
};
class __attribute__ ((visibility ("hidden"))) Foo {
public:
int m() {
return 0;
}
};
int main(void) {
vector<Foo> v;
v.push_back(Foo());
return 0;
}
Everything should be hidden except for main().
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50270] Some symbols are exported even when -fvisibility=hidden is used
2011-09-01 19:54 [Bug c++/50270] New: Some symbols are exported even when -fvisibility=hidden is used almeidaraf at gmail dot com
` (3 preceding siblings ...)
2011-09-01 19:59 ` almeidaraf at gmail dot com
@ 2011-09-02 9:32 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-09-02 9:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50270
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-09-02 09:30:32 UTC ---
Dup.
*** This bug has been marked as a duplicate of bug 48818 ***
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-09-02 9:32 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-09-01 19:54 [Bug c++/50270] New: Some symbols are exported even when -fvisibility=hidden is used almeidaraf at gmail dot com
2011-09-01 19:57 ` [Bug c++/50270] " almeidaraf at gmail dot com
2011-09-01 19:58 ` almeidaraf at gmail dot com
2011-09-01 19:59 ` pinskia at gcc dot gnu.org
2011-09-01 19:59 ` almeidaraf at gmail dot com
2011-09-02 9:32 ` rguenth at gcc dot gnu.org
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