diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_addrhashmap.h b/compiler-rt/lib/sanitizer_common/sanitizer_addrhashmap.h
--- a/compiler-rt/lib/sanitizer_common/sanitizer_addrhashmap.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_addrhashmap.h
@@ -89,6 +89,9 @@
     bool                   create_;
   };
 
+  typedef void (*ForEachCallback)(const uptr Key, const T &Val, void *Arg);
+  void ForEach(ForEachCallback Cb, void *Arg);
+
  private:
   friend class Handle;
   Bucket *table_;
@@ -98,6 +101,35 @@
   uptr calcHash(uptr addr);
 };
 
+template <typename T, uptr kSize>
+void AddrHashMap<T, kSize>::ForEach(ForEachCallback Cb, void *Arg) {
+  for (int n = 0; n < kSize; n++) {
+    Bucket *bucket = &table_[n];
+
+    bucket->mtx.ReadLock();
+
+    for (uptr i = 0; i < kBucketSize; i++) {
+      Cell *c = &bucket->cells[i];
+      uptr addr1 = atomic_load(&c->addr, memory_order_acquire);
+      if (addr1 != 0)
+        Cb(addr1, c->val, Arg);
+    }
+
+    // Iterate over any additional cells.
+    if (AddBucket *add =
+            (AddBucket *)atomic_load(&bucket->add, memory_order_relaxed)) {
+      for (uptr i = 0; i < add->size; i++) {
+        Cell *c = &add->cells[i];
+        uptr addr1 = atomic_load(&c->addr, memory_order_relaxed);
+        if (addr1 != 0)
+          Cb(addr1, c->val, Arg);
+      }
+    }
+
+    bucket->mtx.ReadUnlock();
+  }
+}
+
 template<typename T, uptr kSize>
 AddrHashMap<T, kSize>::Handle::Handle(AddrHashMap<T, kSize> *map, uptr addr) {
   map_ = map;