int main(int argc, const char *argv[]) {
int i;
if (argc < 2)
return 1;
const char *FileN = argv[1];
__llvm_profile_set_filename(FileN);
/* Start profiling. */
__llvm_profile_reset_counters();
foo(1);
/* End profiling by freezing counters and
* dump them to the file. */
if (__llvm_profile_write_file())
return 1;
/* Read profile data into buffer. */
FILE *File = fopen(FileN, "r");
if (!File)
return 1;
fseek(File, 0, SEEK_END);
uint64_t Size = ftell(File);
fseek(File, 0, SEEK_SET);
char *Buffer = (char *)malloc(Size);
if (Size != fread(Buffer, 1, Size, File))
return 1;
fclose(File);
/* Its profile will be discarded. */
for (i = 0; i < 10; i++)
bar();
/* Start profiling again and merge in previously
saved counters in buffer. */
__llvm_profile_reset_counters();
__llvm_profile_merge_from_buffer(Buffer, Size);
foo(2);
/* End profiling. */
truncate(FileN, 0);
if (__llvm_profile_write_file())
return 1;
/* Its profile will be discarded. */
bar();
return 0;
}
/* Returns 0 (size) when an error occurs. */
uint64_t libEntry(char *Buffer, uint64_t MaxSize) {
uint64_t Size = __llvm_profile_get_size_for_buffer();
if (Size > MaxSize)
return 0;
__llvm_profile_reset_counters();
bar('1');
if (__llvm_profile_write_buffer(Buffer))
return 0;
/* Now check compatibility. Should return 0. */
if (__llvm_profile_check_compatibility(Buffer, Size))
return 0;
return Size;
}
int main(void) {
foo(0);
__llvm_profile_reset_counters();
foo(1);
return 0;
}
