Add debug printfs in secondary cache adapter destructor (facebook#13606)

Summary:
Add debug printfs to troubleshoot an intermittent crash test assertion failure.

Pull Request resolved: facebook#13606

Reviewed By: mszeszko-meta

Differential Revision: D74661545

Pulled By: anand1976

fbshipit-source-id: 1b2a30fbbea3dcea5ce1a199344e946da687ff1f

Author: anand1976

cache/secondary_cache_adapter.cc

@@ -121,7 +121,17 @@ CacheWithSecondaryAdapter::~CacheWithSecondaryAdapter() {
     assert(s.ok());
     assert(placeholder_usage_ == 0);
     assert(reserved_usage_ == 0);
-    assert(pri_cache_res_->GetTotalMemoryUsed() == sec_capacity);
+    bool pri_cache_res_mismatch =
+        pri_cache_res_->GetTotalMemoryUsed() != sec_capacity;
+    if (pri_cache_res_mismatch) {
+      fprintf(stderr,
+              "~CacheWithSecondaryAdapter: Primary cache reservation: "
+              "%zu, Secondary cache capacity: %zu, "
+              "Secondary cache reserved: %zu\n",
+              pri_cache_res_->GetTotalMemoryUsed(), sec_capacity,
+              sec_reserved_);
+      assert(pri_cache_res_mismatch);
+    }
   }
 #endif  // NDEBUG
 }