40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
|
/* This header makes it possible to redefine system calls to the
|
||
|
|
* file system. This way, minix servers can re-route the data
|
||
|
|
* that libgcov tries to send to the file system. This is
|
||
|
|
* necessary, because the servers can't access the file system
|
||
|
|
* directly. Instead, they will copy the data to a helping user
|
||
|
|
* space process, which will call the file system for them.
|
||
|
|
* For more information, see the <minix/gcov.h> header file.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
|
||
|
|
/* These function pointers initially point to the standard system library
|
||
|
|
* functions (fopen, etc). All calls to these system library functions are
|
||
|
|
* then redefined to calls to these function pointers. Because the pointers
|
||
|
|
* still point to the original functions, all functionality is unchanged.
|
||
|
|
* Therefore, libgcov won't act differently when linked to applications.
|
||
|
|
* But, when these pointers are redefined by code within the minix servers,
|
||
|
|
* the file system calls get replaced by other functionality.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define fopen(...) _gcov_fopen(__VA_ARGS__)
|
||
|
|
#define fread(...) _gcov_fread(__VA_ARGS__)
|
||
|
|
#define fwrite(...) _gcov_fwrite(__VA_ARGS__)
|
||
|
|
#define fclose(...) _gcov_fclose(__VA_ARGS__)
|
||
|
|
#define fseek(...) _gcov_fseek(__VA_ARGS__)
|
||
|
|
#define getenv(...) _gcov_getenv(__VA_ARGS__)
|
||
|
|
|
||
|
|
|
||
|
|
/* wrapper to make it possible to disable gcov_exit on a process exit (for mfs) */
|
||
|
|
|
||
|
|
int do_gcov_exit = 1;
|
||
|
|
|
||
|
|
void gcov_exit_wrapper(void){
|
||
|
|
if(do_gcov_exit)
|
||
|
|
gcov_exit();
|
||
|
|
}
|