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two constructor copies in object file
- From: "Rogelio M. Serrano Jr." <rogelio at evoserve dot com>
- To: gcc at gcc dot gnu dot org
- Date: Thu, 17 Jan 2002 08:29:20 +0800
- Subject: two constructor copies in object file
I compiled the following code with: g++-3.1 -nostdinc -nostdinc++ -c
g++ is snapshot 20020114 with threads disabled.
extern "C" char* _end;
class boot_obj
{
protected:
static char* top_of_heap;
boot_obj() throw();
boot_obj(boot_obj& x) throw();
void* boot_alloc(unsigned int) throw();
};
boot_obj::boot_obj() throw ()
{
static bool started = false;
if (!started)
{
top_of_heap = reinterpret_cast<char*>((reinterpret_cast<unsigned int>(_end) + 0x01) & ~0x01);
started = false;
}
}
boot_obj::boot_obj(boot_obj& x) throw ()
{
}
void* boot_obj::boot_alloc(unsigned int sz) throw ()
{
void* ret = top_of_heap;
top_of_heap += ((sz + 0x01) & ~0x01);
return ret;
}
nm --demangle yeilds the following:
0000005c T boot_obj::boot_alloc(unsigned)
U boot_obj::top_of_heap
00000054 T boot_obj::boot_obj(boot_obj&)
00000026 T boot_obj::boot_obj()
0000004c T boot_obj::boot_obj(boot_obj&)
00000000 T boot_obj::boot_obj()
00000000 d boot_obj::boot_obj()::started
U _end
Why are the constructors created twice?
and why is the static member undefined?