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1 total messages Started by yb Wed, 27 Jan 1993 03:06
badly generated operator new in template
#1436
Author: yb
Date: Wed, 27 Jan 1993 03:06
55 lines
2236 bytes
g++ 2.3.3 generates incorrect operator new when it is defined in a template class. 
Looking at the assembly code, I noticed that the allocated-size is not loaded
from the good register.

The following piece of code illustrates this problem :

% cat foo.cc
#include <stddef.h>
#include <stdio.h>

template <class T>
class A {
public:
	T v;
	void* operator new (size_t);
};

template <class T> void*
A<T> :: operator new (size_t s)
{
	printf ("%d\n", s);
	return new char [s];
}

main ()
{
	printf ("%d\n", sizeof(A<int>));
	A<int>* a = new A<int>;
}
% gcc -v
Reading specs from /usr/local/gnu/lib/gcc-lib/hp700-hpux/2.3.3/specs
gcc version 2.3.3
% gcc foo.cc
% a.out
4
-278528
Virtual memory exceeded in `new'
----------------
Interesting !

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