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// RUN: %clangxx -m64 -O0 -g -xc++ %s -o %t && %run %t
// RUN: %clangxx -m64 -O3 -g -xc++ %s -o %t && %run %t
// REQUIRES: x86_64-target-arch
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#if __has_feature(memory_sanitizer)
#include <sanitizer/msan_interface.h>
static void check_mem_is_good(void *p, size_t s) {
__msan_check_mem_is_initialized(p, s);
}
#elif __has_feature(address_sanitizer)
#include <sanitizer/asan_interface.h>
static void check_mem_is_good(void *p, size_t s) {
assert(__asan_region_is_poisoned(p, s) == 0);
}
#else
static void check_mem_is_good(void *p, size_t s) {}
#endif
static void run(bool flush) {
char *buf;
size_t buf_len;
fprintf(stderr, " &buf %p, &buf_len %p\n", &buf, &buf_len);
FILE *fp = open_memstream(&buf, &buf_len);
fprintf(fp, "hello");
if (flush) {
fflush(fp);
check_mem_is_good(&buf, sizeof(buf));
check_mem_is_good(&buf_len, sizeof(buf_len));
check_mem_is_good(buf, buf_len);
}
char *p = new char[1024];
memset(p, 'a', 1023);
p[1023] = 0;
for (int i = 0; i < 100; ++i)
fprintf(fp, "%s", p);
delete[] p;
if (flush) {
fflush(fp);
fprintf(stderr, " %p addr %p, len %zu\n", &buf, buf, buf_len);
check_mem_is_good(&buf, sizeof(buf));
check_mem_is_good(&buf_len, sizeof(buf_len));
check_mem_is_good(buf, buf_len);\
}
fclose(fp);
check_mem_is_good(&buf, sizeof(buf));
check_mem_is_good(&buf_len, sizeof(buf_len));
check_mem_is_good(buf, buf_len);
free(buf);
}
int main(void) {
for (int i = 0; i < 100; ++i)
run(false);
for (int i = 0; i < 100; ++i)
run(true);
return 0;
}
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