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