diff --git a/compiler-rt/lib/asan/asan_allocator.cpp b/compiler-rt/lib/asan/asan_allocator.cpp
--- a/compiler-rt/lib/asan/asan_allocator.cpp
+++ b/compiler-rt/lib/asan/asan_allocator.cpp
@@ -1190,6 +1190,16 @@
   m->lsan_tag = __lsan::kIgnored;
   return kIgnoreObjectSuccess;
 }
+
+IgnoreObjectResult UnIgnoreObjectLocked(const void *p) {
+  __asan::AsanChunk *m = LookUpValidChunk(p);
+  if (!m)
+    return kIgnoreObjectInvalid;
+  if (m->lsan_tag != kIgnored)
+    return kIgnoreObjectNotAlreadyIgnored;
+  m->lsan_tag = __lsan::kDirectlyLeaked;
+  return kIgnoreObjectSuccess;
+}
 }  // namespace __lsan
 
 // ---------------------- Interface ---------------- {{{1
diff --git a/compiler-rt/lib/lsan/lsan_allocator.cpp b/compiler-rt/lib/lsan/lsan_allocator.cpp
--- a/compiler-rt/lib/lsan/lsan_allocator.cpp
+++ b/compiler-rt/lib/lsan/lsan_allocator.cpp
@@ -316,6 +316,16 @@
   m->tag = kIgnored;
   return kIgnoreObjectSuccess;
 }
+
+IgnoreObjectResult UnIgnoreObjectLocked(const void *p) {
+  ChunkMetadata *m = LookUpValidChunk(p);
+  if (!m)
+    return kIgnoreObjectInvalid;
+  if (m->tag != kIgnored)
+    return kIgnoreObjectNotAlreadyIgnored;
+  m->tag = kDirectlyLeaked;
+  return kIgnoreObjectSuccess;
+}
 } // namespace __lsan
 
 using namespace __lsan;
diff --git a/compiler-rt/lib/lsan/lsan_common.h b/compiler-rt/lib/lsan/lsan_common.h
--- a/compiler-rt/lib/lsan/lsan_common.h
+++ b/compiler-rt/lib/lsan/lsan_common.h
@@ -155,6 +155,7 @@
 enum IgnoreObjectResult {
   kIgnoreObjectSuccess,
   kIgnoreObjectAlreadyIgnored,
+  kIgnoreObjectNotAlreadyIgnored,
   kIgnoreObjectInvalid
 };
 
@@ -242,6 +243,7 @@
 uptr GetUserBegin(uptr chunk);
 // Helper for __lsan_ignore_object().
 IgnoreObjectResult IgnoreObjectLocked(const void *p);
+IgnoreObjectResult UnIgnoreObjectLocked(const void *p);
 
 // Return the linker module, if valid for the platform.
 LoadedModule *GetLinker();