1 // RUN: %clangxx -m64 -O0 -g -xc++ %s -o %t && %run %t
2 // RUN: %clangxx -m64 -O3 -g -xc++ %s -o %t && %run %t
3 // REQUIRES: x86_64-supported-target
4
5 #include <assert.h>
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9
10 #ifndef __has_feature
11 #define __has_feature(x) 0
12 #endif
13
14 #if __has_feature(memory_sanitizer)
15 #include <sanitizer/msan_interface.h>
check_mem_is_good(void * p,size_t s)16 static void check_mem_is_good(void *p, size_t s) {
17 __msan_check_mem_is_initialized(p, s);
18 }
19 #elif __has_feature(address_sanitizer)
20 #include <sanitizer/asan_interface.h>
check_mem_is_good(void * p,size_t s)21 static void check_mem_is_good(void *p, size_t s) {
22 assert(__asan_region_is_poisoned(p, s) == 0);
23 }
24 #else
check_mem_is_good(void * p,size_t s)25 static void check_mem_is_good(void *p, size_t s) {}
26 #endif
27
run(void)28 static void run(void) {
29 char *buf;
30 size_t buf_len;
31 fprintf(stderr, " &buf %p, &buf_len %p\n", &buf, &buf_len);
32 FILE *fp = open_memstream(&buf, &buf_len);
33 fprintf(fp, "hello");
34 fflush(fp);
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 char *p = new char[1024];
40 memset(p, 'a', 1023);
41 p[1023] = 0;
42 for (int i = 0; i < 100; ++i)
43 fprintf(fp, "%s", p);
44 delete[] p;
45 fflush(fp);
46 fprintf(stderr, " %p addr %p, len %zu\n", &buf, buf, buf_len);
47 check_mem_is_good(&buf, sizeof(buf));
48 check_mem_is_good(&buf_len, sizeof(buf_len));
49 check_mem_is_good(buf, buf_len);
50 fclose(fp);
51 free(buf);
52 }
53
main(void)54 int main(void) {
55 for (int i = 0; i < 100; ++i)
56 run();
57 return 0;
58 }
59