memcheck/tests/linux/dlclose_leak.c

   1 /*  Test reporting of memory leaks in objects that have been dlopen'ed.
   2  *   File:   dlclose_leak.c */
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <dlfcn.h>
   7 #include <assert.h>
   8
   9 int (*jmp_on_uninit)(void);
  10 char* (*alloc_1_byte)(void);
  11
  12 int main(int argc, char** argv)
  13 {
  14     int i; for (i = 0; i < 2; ++i)
  15     {
  16         char* memToLeak;
  17         char x __attribute__((unused));
  18         void* handle = dlopen("./dlclose_leak_so.so", RTLD_NOW);
  19         if(!handle) {
  20             printf("FAILURE to dlopen dlclose_leak_so.so\n");
  21             return EXIT_FAILURE;
  22         }
  23         jmp_on_uninit = dlsym(handle,"jmp_on_uninit");
  24         //fprintf(stderr, "jmp_on_uninit: %p\n", jmp_on_uninit);
  25         assert(jmp_on_uninit);
  26         alloc_1_byte = dlsym(handle,"alloc_1_byte");
  27         //fprintf(stderr, "alloc_1_byte: %p\n", alloc_1_byte);
  28         assert(alloc_1_byte);
  29         (void)jmp_on_uninit();
  30         memToLeak = alloc_1_byte();
  31         dlclose(handle);
  32         x = memToLeak[-1];
  33     }
  34     fprintf(stderr, "done!\n");
  35     return (EXIT_SUCCESS);
  36 }