| Summary: | -fvisibility=hidden and stl -> SEGV in __gnu_cxx::__pool<true>::_M_reclaim_block | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Caolan McNamara <caolanm> |
| Component: | libstdc++ | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | gcc-bugs, jakub |
| Priority: | P2 | ||
| Version: | 4.0.1 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | ||
| Attachments: | example to reproduce | ||
Created attachment 9268 [details]
example to reproduce
A couple of quick comments: in the report, you are not saying that your gcc-4.0.1 is *not* default configured (i.e., the default is the new-based allocator); also -fvisibility is known to have *lots* of issues, irrespective of allocators (e.g., grep the mailing lists for some trenchant comments general considerations from Roger Sayle). IMHO either we want to just force what must have default visibility to have
the default visibility (in mt_allocator.h case it is _S_get_pool), as in:
--- ext/mt_allocator.h 2005-05-20 03:36:29.000000000 +0200
+++ ext/mt_allocator.h 2005-07-14 17:17:49.000000000 +0200
@@ -413,7 +413,7 @@ namespace __gnu_cxx
struct _M_rebind
{ typedef __common_pool_policy<_PoolTp1, _Thread1> other; };
- static pool_type&
+ static __attribute__((visibility ("default"))) pool_type&
_S_get_pool()
{
static pool_type _S_pool;
@@ -444,7 +444,7 @@ namespace __gnu_cxx
struct _M_rebind
{ typedef __common_pool_policy<_PoolTp1, _Thread1> other; };
- static pool_type&
+ static __attribute__((visibility ("default"))) pool_type&
_S_get_pool()
{
static pool_type _S_pool;
@@ -490,7 +490,7 @@ namespace __gnu_cxx
struct _M_rebind
{ typedef __per_type_pool_policy<_Tp1, _PoolTp1, _Thread1> other; };
- static pool_type&
+ static __attribute__((visibility ("default"))) pool_type&
_S_get_pool()
{
// Sane defaults for the _PoolTp.
@@ -536,7 +536,7 @@ namespace __gnu_cxx
struct _M_rebind
{ typedef __per_type_pool_policy<_Tp1, _PoolTp1, _Thread1> other; };
- static pool_type&
+ static __attribute__((visibility ("default"))) pool_type&
_S_get_pool()
{
// Sane defaults for the _PoolTp.
(of course together with a libstdc++-v3/configure check for visibility
attribute and using a macro for that, __gxx_default_visibility or something
like that).
Not sure what other places in libstdc++-v3 headers rely on having the default
visibility.
Alternatively, we claim that all of libstdc++-v3 header stuff (or most of it)
needs default visibility and add
#pragma GCC visibility push(default) ... #pragma GCC visibility pop
markers around (most of) libstdc++-v3 headers, like it has been already
added for libsupc++ headers. This wasn't possible earlier when we had the
16 GCC visibility pragmas stacking limit, but now that it is gone, we can
fix that up. Of course the issues Roger raised need to be solved as well.
After reading comment #3, this is in fact a dup of bug 19664. *** This bug has been marked as a duplicate of 19664 *** |
perhaps this is user error on my side, but given the attachment, run runme.sh and I get a stacktrace of... #0 0x00b88dab in __gnu_cxx::__pool<true>::_M_reclaim_block () from /usr/lib/libstdc++.so.6 #1 0x00517ff2 in __gnu_cxx::__mt_alloc<int, __gnu_cxx::__common_pool_policy<__gnu_cxx::__pool, true> >::deallocate (this=0x8e571c8, __p=0x8e551f8, __n=2) at /usr/lib/gcc/i386-redhat-linux/4.0.1/../../../../include/c++/4.0.1/ext/mt_allocator.h:746 #2 0x00518025 in std::_Vector_base<int, std::allocator<int> >::_M_deallocate (this=0x8e571c8, __p=0x8e551f8, __n=2) at /usr/lib/gcc/i386-redhat-linux/4.0.1/../../../../include/c++/4.0.1/bits/stl_vector.h:123 #3 0x0051806c in ~_Vector_base (this=0x8e571c8) at /usr/lib/gcc/i386-redhat-linux/4.0.1/../../../../include/c++/4.0.1/bits/stl_vector.h:109 #4 0x0051819f in ~vector (this=0x8e571c8) at /usr/lib/gcc/i386-redhat-linux/4.0.1/../../../../include/c++/4.0.1/bits/stl_vector.h:273 #5 0x005181c6 in __gnu_cxx::__mt_alloc_base<std::vector<int, std::allocator<int> > >::destroy ( this=0xbf9f4d2f, __p=0x8e571c8) at /usr/lib/gcc/i386-redhat-linux/4.0.1/../../../../include/c++/4.0.1/ext/mt_allocator.h:614 #6 0x005181f2 in std::_Destroy<std::vector<int, std::allocator<int> >*, std::allocator<std::vector<int, std::allocator<int> > > > (__first=0x8e571c8, __last=0x8e571e0, __alloc=@0xbf9f4d2f) at /usr/lib/gcc/i386-redhat-linux/4.0.1/../../../../include/c++/4.0.1/bits/stl_construct.h:174 #7 0x00518246 in ~vector (this=0xbf9f4d70) at /usr/lib/gcc/i386-redhat-linux/4.0.1/../../../../include/c++/4.0.1/bits/stl_vector.h:273 #8 0x0051792d in testfoo () at dlgass.cxx:7 #9 0x08048531 in main ()