FC4, g++ (GCC) 4.0.2 20051125 (Red Hat 4.0.2-8)
We have a no. of libraries which have worked fine up till now (even using
4.0.1 on FC3, albeit with libstdc++-3.4.4-). Now with 4.0.1 (& 4.0.2)'s
libstdc, I'm getting a crash immediately at start-up in mt_allocator.h, within
_M_adjust_freelist:
void
_M_adjust_freelist(const _Bin_record& __bin, _Block_record* __block,
size_t __thread_id)
{
if (__gthread_active_p())
{
__block->_M_thread_id = __thread_id;
HERE -> --__bin._M_free[__thread_id];
++__bin._M_used[__thread_id];
}
}
At the point at which it happens, _M_free is uninitialised. This is
constructing a deque with the following code:
<.h>
#include <string>
#include <deque>
class CObject
{
public:
struct SDeadObject
{
void *Ptr;
std::string Name;
SDeadObject() { Ptr = NULL; Name = ""; }
SDeadObject( void *ptr, const std::string &name ) {
Ptr = ptr; Name = name; }
};
typedef std::deque<SDeadObject> DEAD_OBJECT_DEQUE;
typedef std::deque<SDeadObject>::iterator DEAD_OBJECT_DEQUE_ITERATOR;
protected:
static DEAD_OBJECT_DEQUE RecentlyDeadObjects;
};
<.cpp>
CObject::DEAD_OBJECT_DEQUE CObject::RecentlyDeadObjects;
Now, if I create a library with /just/ this code it, and dlopen() it, it
works OK. However, if I link that library to my other two base libraries, I
get the crash.
I'm guessing that the order of global constructors is altered by the
dependancy linkage, and that this constructor is being called before the pool
allocator's [I can't find the body code for the pool template's
_M_initialize() anywhere ...].
But I don't have any idea how to work around it, or even be sure whether
it's our code or the STL.
I did discover that GLIBCXX_FORCE_NEW=1 at runtime makes it work OK.
g++ -MMD -Wall -fmessage-length=0 -ggdb -fpic -D_GNU_SOURCE
-DPROJECT=Buffy -I../../../Buffy -D__posix -DDISABLE_CF_HACKS -o
Linux-i686/Debug/jobby.lo -c jobby.cpp && cp -f Linux-i686/Debug/jobby.d
Linux-i686/Debug/jobby.dep && sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/
*\\$//' -e '/^$/ d' -e 's/$/ :/' <Linux-i686/Debug/jobby.d
>>Linux-i686/Debug/jobby.dep && rm -f Linux-i686/Debug/jobby.d
g++ -shared -o ../../../Libs/Buffy/Linux-i686/Debug/libCF.so
-L../../../Libs/Buffy/Linux-i686/Debug -Wl,-rpath=/software/lib
-Wl,-rpath=/mnt/software/lib
-Wl,-rpath-link=../../../Libs/Buffy/Linux-i686/Debug
Linux-i686/Debug/jobby.lo -lPSUtils
--
[EMAIL PROTECTED] ~]# rm -f .signature
[EMAIL PROTECTED] ~]# ls -l .signature
ls: .signature: No such file or directory
[EMAIL PROTECTED] ~]# exit
