================
@@ -0,0 +1,24 @@
+// RUN: %clangxx_hwasan -O0 %s -o %t && %run %t
+
+#include <assert.h>
+#include <memory>
+#include <sanitizer/hwasan_interface.h>
+#include <set>
+#include <stdio.h>
+
+int main() {
+ auto p = std::make_unique<char>();
+ std::set<void *> ptrs;
+ for (unsigned i = 0;; ++i) {
+ void *ptr = __hwasan_tag_pointer(p.get(), i);
+ if (!ptrs.insert(ptr).second)
+ break;
+ fprintf(stderr, "%p, %u, %u\n", ptr, i,
__hwasan_get_tag_from_pointer(ptr));
+ assert(__hwasan_get_tag_from_pointer(ptr) == i);
+ }
+#ifdef __x86_64__
+ assert(ptrs.size() == 8);
----------------
thurstond wrote:
Is this assuming aliasing mode with 3-bit tags? If so, can the assumption be
added to a `// REQUIRES` or similar?
https://github.com/llvm/llvm-project/pull/75267
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