55 lines · cpp
1// RUN: %clangxx -m64 -O0 -g -xc++ %s -o %t && %run %t2// RUN: %clangxx -m64 -O3 -g -xc++ %s -o %t && %run %t3// REQUIRES: x86_64-target-arch4 5#include <assert.h>6#include <stdio.h>7#include <stdlib.h>8#include <string.h>9 10#include "sanitizer_common/sanitizer_specific.h"11 12static void run(bool flush) {13 char *buf;14 size_t buf_len;15 fprintf(stderr, " &buf %p, &buf_len %p\n", &buf, &buf_len);16 FILE *fp = open_memstream(&buf, &buf_len);17 fprintf(fp, "hello");18 if (flush) {19 fflush(fp);20 check_mem_is_good(&buf, sizeof(buf));21 check_mem_is_good(&buf_len, sizeof(buf_len));22 check_mem_is_good(buf, buf_len);23 }24 25 char *p = new char[1024];26 memset(p, 'a', 1023);27 p[1023] = 0;28 for (int i = 0; i < 100; ++i)29 fprintf(fp, "%s", p);30 delete[] p;31 32 if (flush) {33 fflush(fp);34 fprintf(stderr, " %p addr %p, len %zu\n", &buf, buf, buf_len);35 check_mem_is_good(&buf, sizeof(buf));36 check_mem_is_good(&buf_len, sizeof(buf_len));37 check_mem_is_good(buf, buf_len);\38 }39 40 fclose(fp);41 check_mem_is_good(&buf, sizeof(buf));42 check_mem_is_good(&buf_len, sizeof(buf_len));43 check_mem_is_good(buf, buf_len);44 45 free(buf);46}47 48int main(void) {49 for (int i = 0; i < 100; ++i)50 run(false);51 for (int i = 0; i < 100; ++i)52 run(true);53 return 0;54}55