From 402a406323194e0eaecfb793416e8c7528befc29 Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka@google.com>
Date: Sat, 20 Nov 2021 16:46:27 -0800
Subject: [PATCH] [NFC][sanitizer] Test for b80affb8a149

---
 .../lib/sanitizer_common/tests/sanitizer_stack_store_test.cpp    | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/compiler-rt/lib/sanitizer_common/tests/sanitizer_stack_store_test.cpp b/compiler-rt/lib/sanitizer_common/tests/sanitizer_stack_store_test.cpp
index 3a2db14..c7cb041 100644
--- a/compiler-rt/lib/sanitizer_common/tests/sanitizer_stack_store_test.cpp
+++ b/compiler-rt/lib/sanitizer_common/tests/sanitizer_stack_store_test.cpp
@@ -33,6 +33,8 @@ class StackStoreTest : public testing::Test {
       h.add(i);
       uptr tag = h.get() % 256;
       StackTrace s(frames.data(), size, tag);
+      if (!s.size && !s.tag)
+        continue;
       fn(s);
       std::next_permutation(frames.begin(), frames.end());
     };
@@ -41,6 +43,13 @@ class StackStoreTest : public testing::Test {
   StackStore store_ = {};
 };
 
+TEST_F(StackStoreTest, Empty) {
+  uptr before = store_.Allocated();
+  EXPECT_EQ(0u, store_.Store({}));
+  uptr after = store_.Allocated();
+  EXPECT_EQ(before, after);
+}
+
 TEST_F(StackStoreTest, Basic) {
   std::vector<StackStore::Id> ids;
   ForEachTrace([&](const StackTrace& s) { ids.push_back(store_.Store(s)); });
-- 
2.7.4