// RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t
// RUN: %clangxx_msan -std=c++11 -fsanitize-memory-track-origins -O0 %s -o %t && %run %t
#include <assert.h>
#include <stdio.h>
#include <sanitizer/msan_interface.h>
int main(int argc, char *argv[]) {
FILE *f = fopen(argv[0], "r");
assert(f);
char buf[50];
fread(buf, 1, 1, f);
fflush(f);
assert(f->_IO_read_end > f->_IO_read_base);
__msan_check_mem_is_initialized(f->_IO_read_end, f->_IO_read_end - f->_IO_read_base);
char tmp_file[1000];
sprintf(tmp_file, "%s.write.tmp", argv[0]);
f = fopen(tmp_file, "w+");
assert(f);
fwrite(buf, 1, 1, f);
fflush(f);
assert(f->_IO_write_end > f->_IO_write_base);
__msan_check_mem_is_initialized(f->_IO_write_end, f->_IO_write_end - f->_IO_write_base);
}