1 files changed, 57 insertions, 0 deletions
diff --git a/test/sanitizer_common/TestCases/Linux/open_memstream.cc b/test/sanitizer_common/TestCases/Linux/open_memstream.cc
new file mode 100644
index 0000000000000..6abe0bfb14831
--- /dev/null
+++ b/test/sanitizer_common/TestCases/Linux/open_memstream.cc
@@ -0,0 +1,57 @@
+// RUN: %clangxx -m64 -O0 -g -xc++ %s -o %t && %run %t
+// RUN: %clangxx -m64 -O3 -g -xc++ %s -o %t && %run %t
+
+#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(void) {
+  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");
+  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;
+  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);
+  free(buf);
+}
+
+int main(void) {
+  for (int i = 0; i < 100; ++i)
+    run();
+  return 0;
+}