[asan] suppress the static variable leaks (#1085) (#1159)

* [asan] suppress the static variable leaks

This is to suppress ASAN false positives for static variables.
For example, the ServiceMethodTable::m_slots is sometimes reported as
leaked.

Signed-off-by: Yakiv Huryk <[email protected]>

Author: Yakiv-Huryk

syncd/Asan.cpp

@@ -3,6 +3,13 @@
 #include <csignal>
 #include <sanitizer/lsan_interface.h>
 
+extern "C" {
+    const char* __lsan_default_suppressions() {
+        // SWSS_LOG_ENTER(); // disabled
+        return "leak:__static_initialization_and_destruction_0\n";
+    }
+}
+
 static void sigterm_handler(int signo)
 {
     SWSS_LOG_ENTER();