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From: Ben Bacarisse <ben@bsb.me.uk>
Newsgroups: comp.lang.c
Subject: Re: tcc - first impression. Was: Baby X is bor nagain
Date: Tue, 02 Jul 2024 16:32:23 +0100
Organization: A noiseless patient Spider
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Michael S <already5chosen@yahoo.com> writes:

> On Mon, 1 Jul 2024 20:09:24 +0300
> Michael S <already5chosen@yahoo.com> wrote:
>
> As far as I am concerned, the most intriguing feature of tcc is "Memory
> and Bound checks". Unfortunately, I was not able to make it work. It
> keeps telling me "segmentation error" at first attempt to dereference
> argv. Is this feature Linux-only or 32-bit only or some other type
> of "only" ?

The documentation says it should work on x86_64 in Windows.

Can you post the code so we can compare.  With this little program

  #include <stdio.h>
   
  void f(int *a, int n)
  {
       printf("a[%d] == %d\n", n, a[n]);
  }
   
  int main(int argc, char **argv)
  {
       for (int i = 0; i <= argc; i++)
            if (argv[i])
                 printf("argv[%d] == %s\n", i, argv[i]);
            else printf("argv[%d] is a null pointer\n", i);
       int a[3];
       f(a, 3);
  }

I get this output:

$ ./a.out 1
argv[0] == ./a.out
argv[1] == 1
argv[2] is a null pointer
004021b9 : at ???: BCHECK: 0x7ffca6719404 is outside of the region
t.c:5: by f
t.c:15: by main
t.c:5: at f: RUNTIME ERROR: invalid memory access
t.c:15: by main    

-- 
Ben.