src/compiler-rt/test/profile/Inputs/instrprof-merge-match.c

   1 #include <stdint.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 int __llvm_profile_runtime = 0;
   6 uint64_t __llvm_profile_get_size_for_buffer(void);
   7 int __llvm_profile_write_buffer(char *);
   8 void __llvm_profile_reset_counters(void);
   9 int  __llvm_profile_check_compatibility(const char *, uint64_t);
  10
  11 int g = 0;
  12 void foo(char c) {
  13   if (c == '1')
  14     g++;
  15   else
  16     g--;
  17 }
  18
  19 extern uint64_t libEntry(char *Buffer, uint64_t MaxSize);
  20
  21 int main(int argc, const char *argv[]) {
  22   const uint64_t MaxSize = 10000;
  23   static char Buffer[MaxSize];
  24
  25   uint64_t Size = __llvm_profile_get_size_for_buffer();
  26   if (Size > MaxSize)
  27     return 1;
  28
  29   __llvm_profile_reset_counters();
  30   foo('0');
  31
  32   if (__llvm_profile_write_buffer(Buffer))
  33     return 1;
  34
  35   /* Now check compatibility. Should return 0.  */
  36   if (__llvm_profile_check_compatibility(Buffer, Size))
  37     return 1;
  38
  39   /* Clear the buffer. */
  40   memset(Buffer, 0, MaxSize);
  41
  42   /* Collect profile from shared library.  */
  43   Size = libEntry(Buffer, MaxSize);
  44
  45   if (!Size)
  46     return 1;
  47
  48   /* Shared library's profile should not match main executable's. */
  49   if (!__llvm_profile_check_compatibility(Buffer, Size))
  50     return 1;
  51
  52   return 0;
  53 }
  54