[HWASan] Untag argument to __hwasan_tag_memory.

__hwasan_tag_memory expects untagged pointers, so make sure our pointer is untagged.
aaryanshukla · Apr 22, 2021 · 3511022 · 3511022
1 parent 3f1e827
commit 3511022
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/compiler-rt/test/hwasan/TestCases/hwasan-print-shadow.cpp b/compiler-rt/test/hwasan/TestCases/hwasan-print-shadow.cpp
@@ -8,7 +8,10 @@
 #include <sanitizer/hwasan_interface.h>
 
 int main() {
-  char *p = (char *)malloc(4096);
+  void *alloc = malloc(4096);
+
+  // __hwasan_tag_memory expects untagged pointers.
+  char *p = (char *)__hwasan_tag_pointer(alloc, 0);
   assert(p);
 
   __hwasan_tag_memory(p, 1, 32);
@@ -26,5 +29,5 @@ int main() {
   // CHECK-NEXT:   {{.*}}0: 0
   // CHECK-NEXT:   {{.*}}0: 4
 
-  free(p);
+  free(alloc);
 }