compiler-rt/test/profile/Inputs/instrprof-dlopen-dlclose-main.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 int main(int argc, char *argv[]) {
   6   dlerror();
   7   void *f1_handle = dlopen("func.shared", RTLD_LAZY | RTLD_GLOBAL);
   8   if (f1_handle == NULL) {
   9     fprintf(stderr, "unable to open 'func.shared': %s\n", dlerror());
  10     return EXIT_FAILURE;
  11   }
  12
  13   void (*func)(void) = (void (*)(void))dlsym(f1_handle, "func");
  14   if (func == NULL) {
  15     fprintf(stderr, "unable to lookup symbol 'func': %s\n", dlerror());
  16     return EXIT_FAILURE;
  17   }
  18
  19   dlerror();
  20   void *f2_handle = dlopen("func2.shared", RTLD_LAZY | RTLD_GLOBAL);
  21   if (f2_handle == NULL) {
  22     fprintf(stderr, "unable to open 'func2.shared': %s\n", dlerror());
  23     return EXIT_FAILURE;
  24   }
  25
  26   void (*func2)(void) = (void (*)(void))dlsym(f2_handle, "func2");
  27   if (func2 == NULL) {
  28     fprintf(stderr, "unable to lookup symbol 'func2': %s\n", dlerror());
  29     return EXIT_FAILURE;
  30   }
  31   func2();
  32
  33 #ifdef USE_LIB3
  34   void *f3_handle = dlopen("func3.shared", RTLD_LAZY | RTLD_GLOBAL);
  35   if (f3_handle == NULL) {
  36     fprintf(stderr, "unable to open 'func3.shared': %s\n", dlerror());
  37     return EXIT_FAILURE;
  38   }
  39
  40   void (*func3)(void) = (void (*)(void))dlsym(f3_handle, "func3");
  41   if (func3 == NULL) {
  42     fprintf(stderr, "unable to lookup symbol 'func3': %s\n", dlerror());
  43     return EXIT_FAILURE;
  44   }
  45   func3();
  46 #endif
  47
  48   dlerror();
  49   void (*gcov_flush1)() = (void (*)())dlsym(f1_handle, "__gcov_flush");
  50   if (gcov_flush1 == NULL) {
  51     fprintf(stderr, "unable to find __gcov_flush in func.shared': %s\n", dlerror());
  52     return EXIT_FAILURE;
  53   }
  54
  55   dlerror();
  56   void (*gcov_flush2)() = (void (*)())dlsym(f2_handle, "__gcov_flush");
  57   if (gcov_flush2 == NULL) {
  58     fprintf(stderr, "unable to find __gcov_flush in func2.shared': %s\n", dlerror());
  59     return EXIT_FAILURE;
  60   }
  61
  62   if (gcov_flush1 == gcov_flush2) {
  63     fprintf(stderr, "Same __gcov_flush found in func.shared and func2.shared\n");
  64     return EXIT_FAILURE;
  65   }
  66
  67   dlerror();
  68   if (dlclose(f2_handle) != 0) {
  69     fprintf(stderr, "unable to close 'func2.shared': %s\n", dlerror());
  70     return EXIT_FAILURE;
  71   }
  72
  73   func();
  74
  75   int g1 = 0;
  76   int g2 = 0;
  77   int n = 10;
  78
  79   if (n % 5 == 0)
  80     g1++;
  81   else
  82     g2++;
  83
  84   return EXIT_SUCCESS;
  85 }
  86