malloc overrides

[Dave Korn]

Yaakov (Cygwin/X) wrote:

> ####### start code 1 #######
> 
> /* Are we stuck with standard malloc? */
> 
> extern void _exit (int);
> extern char* strdup (const char*);

  static int are_we_stuck = 1;
> 
> char* malloc(unsigned n) {
      are_we_stuck = 0;
>     return 0;
> }
> 
> int main(void) {
>     strdup("yo");
      _exit (are_we_stuck);
> }
> 
> ####### end code 1 #######

  FTFY.

> ####### start code 2 #######
> 
> /* Is alloca is based on malloc()? */
> 
> #include <alloca.h>
> 
> void* malloc(unsigned int size) {
>     exit(0);
>     return 0;
> }
> 
> int main(void) {
>     alloca(10);
>     return 1;
> }
> 
> ####### end code 1 #######

  Left as an exercise for the reader.

    cheers,
      DaveK

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