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 4 #include <assert.h> 5 #include <stdio.h> 6 #include <stdlib.h> 7 #include <string.h> 8 9 #ifndef __has_feature 10 #define __has_feature(x) 0 11 #endif 12 13 #if __has_feature(memory_sanitizer) 14 #include <sanitizer/msan_interface.h> 15 static void check_mem_is_good(void *p, size_t s) { 16 __msan_check_mem_is_initialized(p, s); 17 } 18 #elif __has_feature(address_sanitizer) 19 #include <sanitizer/asan_interface.h> 20 static void check_mem_is_good(void *p, size_t s) { 21 assert(__asan_region_is_poisoned(p, s) == 0); 22 } 23 #else 24 static void check_mem_is_good(void *p, size_t s) {} 25 #endif 26 27 static void run(void) { 28 char *buf; 29 size_t buf_len; 30 fprintf(stderr, " &buf %p, &buf_len %p\n", &buf, &buf_len); 31 FILE *fp = open_memstream(&buf, &buf_len); 32 fprintf(fp, "hello"); 33 fflush(fp); 34 check_mem_is_good(&buf, sizeof(buf)); 35 check_mem_is_good(&buf_len, sizeof(buf_len)); 36 check_mem_is_good(buf, buf_len); 37 38 char *p = new char[1024]; 39 memset(p, 'a', 1023); 40 p[1023] = 0; 41 for (int i = 0; i < 100; ++i) 42 fprintf(fp, "%s", p); 43 delete[] p; 44 fflush(fp); 45 fprintf(stderr, " %p addr %p, len %zu\n", &buf, buf, buf_len); 46 check_mem_is_good(&buf, sizeof(buf)); 47 check_mem_is_good(&buf_len, sizeof(buf_len)); 48 check_mem_is_good(buf, buf_len); 49 fclose(fp); 50 free(buf); 51 } 52 53 int main(void) { 54 for (int i = 0; i < 100; ++i) 55 run(); 56 return 0; 57 } 58
