compiler-rt/test/profile/ContinuousSyncMode/set-file-object.c

   1 // REQUIRES: darwin
   2
   3 // RUN: %clang_pgogen -o %t.exe %s
   4 // RUN: env LLVM_PROFILE_FILE="%c%t.profraw" %run %t.exe %t.bad 2>&1 | FileCheck %s
   5
   6 // CHECK: __llvm_profile_set_file_object(fd={{[0-9]+}}) not supported
   7 // CHECK: Profile data not written to file: already written.
   8
   9 #include <stdio.h>
  10
  11 extern int __llvm_profile_is_continuous_mode_enabled(void);
  12 extern void __llvm_profile_set_file_object(FILE *, int);
  13 extern int __llvm_profile_write_file(void);
  14
  15 int main(int argc, char **argv) {
  16   if (!__llvm_profile_is_continuous_mode_enabled())
  17     return 1;
  18
  19   FILE *f = fopen(argv[1], "a+b");
  20   if (!f)
  21     return 1;
  22
  23   __llvm_profile_set_file_object(f, 0); // Try to set the file to "%t.bad".
  24
  25   if (__llvm_profile_write_file() != 0)
  26     return 1;
  27
  28   f = fopen(argv[1], "r");
  29   if (!f)
  30     return 1;
  31
  32   fseek(f, 0, SEEK_END);
  33   return ftell(f); // Check that the "%t.bad" is empty.
  34 }