testing/test-cases/interpose-malloc.dtest/interposer.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <mach-o/dyld-interposing.h>
   4
   5
   6 char buffer[100000];
   7 char* p = buffer;
   8
   9 void* mymalloc(size_t size)
  10 {
  11     // bump ptr allocate twice the size and fill second half with '#'
  12     char* result = p;
  13     p += size;
  14     memset(p, '#', size);
  15     p += size;
  16     p = (char*)(((long)p + 15) & (-16)); // 16-byte align next malloc
  17     return result;
  18 }
  19
  20 void myfree(void* p)
  21 {
  22 }
  23
  24 DYLD_INTERPOSE(mymalloc, malloc)
  25 DYLD_INTERPOSE(myfree, free)