1 files changed, 27 insertions, 0 deletions
diff --git a/tests/utils.h b/tests/utils.h
index 1f4cece19..cfc68c9a3 100644
--- a/tests/utils.h
+++ b/tests/utils.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <dirent.h>
 #include <dlfcn.h>
 #include <fcntl.h>
 #include <inttypes.h>
@@ -253,3 +254,29 @@ class ExecTestHelper {
   std::string output_;
 };
 #endif
+
+class FdLeakChecker {
+ public:
+  FdLeakChecker() {
+  }
+
+  ~FdLeakChecker() {
+    size_t end_count = CountOpenFds();
+    EXPECT_EQ(start_count_, end_count);
+  }
+
+ private:
+  static size_t CountOpenFds() {
+    auto fd_dir = std::unique_ptr<DIR, decltype(&closedir)>{ opendir("/proc/self/fd"), closedir };
+    size_t count = 0;
+    dirent* de = nullptr;
+    while ((de = readdir(fd_dir.get())) != nullptr) {
+      if (de->d_type == DT_LNK) {
+        ++count;
+      }
+    }
+    return count;
+  }
+
+  size_t start_count_ = CountOpenFds();
+};