compiler-rt/test/msan/Linux/file.cpp

   1 // RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t
   2 // RUN: %clangxx_msan -std=c++11 -fsanitize-memory-track-origins -O0 %s -o %t && %run %t
   3
   4 #include <assert.h>
   5 #include <stdio.h>
   6
   7 #include <sanitizer/msan_interface.h>
   8
   9 int main(int argc, char *argv[]) {
  10   FILE *f = fopen(argv[0], "r");
  11   assert(f);
  12   char buf[50];
  13   fread(buf, 1, 1, f);
  14   fflush(f);
  15
  16   assert(f->_IO_read_end > f->_IO_read_base);
  17   __msan_check_mem_is_initialized(f->_IO_read_end, f->_IO_read_end - f->_IO_read_base);
  18
  19   char tmp_file[1000];
  20   sprintf(tmp_file, "%s.write.tmp", argv[0]);
  21
  22   f = fopen(tmp_file, "w+");
  23   assert(f);
  24   fwrite(buf, 1, 1, f);
  25   fflush(f);
  26
  27   assert(f->_IO_write_end > f->_IO_write_base);
  28   __msan_check_mem_is_initialized(f->_IO_write_end, f->_IO_write_end - f->_IO_write_base);
  29 }