30 lines · cpp
1// RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t2// RUN: %clangxx_msan -std=c++11 -fsanitize-memory-track-origins -O0 %s -o %t && %run %t3 4#include <assert.h>5#include <stdio.h>6 7#include <sanitizer/msan_interface.h>8 9int 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}30