"igor pesando - Dept of Physics, University of Torino"
writes:
thanks for the quick answer on the first case.
But the issue is also present if I use malloc in C.
People have explained what you did wrong, which was several things.
Something you might consider: It would have been pretty
Hi Marc,
thanks for the quick answer on the first case.
But the issue is also present if I use malloc in C.
Bests
Igor P
On 22/01/24 11:02, Marc Glisse wrote:
Hello,
mpz_class M[LINES][COLS];
you are trying to put an array with millions of elements on the stack,
so the stack overflows.
On 2024-01-22 15:01:24 +0100, Vincent Lefevre wrote:
> I'm just surprised that GCC doesn't emit any warning
> (even with -O2 -Wall -Wextra), as some pointers are obviously
> incorrect.
The missing warning seems clearly a bug in GCC (I get a warning in
similar code, but not for the combination of
On 2024-01-22 14:34:21 +0100, Torbjorn Granlund wrote:
> Note that there are several typos for the dimensions in the examples, so
> making sense of things is pretty hard.
Indeed,
mpz_init( M[ lin*LINES +col] );
should be lin*COLS + col.
I suspect a buffer overflow due to that (the
On 2024-01-22 11:51:21 +0100, Vincent Lefevre wrote:
> On 2024-01-22 11:02:21 +0100, Marc Glisse wrote:
> > Hello,
> >
> > mpz_class M[LINES][COLS];
> >
> > you are trying to put an array with millions of elements on the stack, so
> > the stack overflows. Very large arrays need to be allocated
Vincent Lefevre writes:
On 2024-01-22 11:02:21 +0100, Marc Glisse wrote:
> Hello,
>
> mpz_class M[LINES][COLS];
>
> you are trying to put an array with millions of elements on the stack, so
> the stack overflows. Very large arrays need to be allocated on the heap in
> C++
On 2024-01-22 11:02:21 +0100, Marc Glisse wrote:
> Hello,
>
> mpz_class M[LINES][COLS];
>
> you are trying to put an array with millions of elements on the stack, so
> the stack overflows. Very large arrays need to be allocated on the heap in
> C++ (new, malloc, or some wrapper like
Hello,
mpz_class M[LINES][COLS];
you are trying to put an array with millions of elements on the stack, so
the stack overflows. Very large arrays need to be allocated on the heap in
C++ (new, malloc, or some wrapper like std::vector).
On Mon, 22 Jan 2024, igor pesando - Dept of Physics,
Hi *,
first of all thanks for your work.
The programs are attached as required.
Best regards
Igor Pesando
*
The issue I have is that the allocation in of a matrix in c++ crashes
the program with SEGFAULT if the dimension are
