chromium/third_party/protobuf/php/tests/valgrind.supp

{
   PHP_Equal_Val
   Memcheck:Cond
   fun:zend_string_equal_val
}

{
   PHP_ScanDir_Tail
   Memcheck:Cond
   obj:/usr/bin/php7.3
   fun:__scandir64_tail
}

{
   PHP_ModuleLoadingLeaks
   Memcheck:Leak
   ...
   fun:php_module_startup
}

{
   PHP_ModuleLoadingLeaks
   Memcheck:Leak
   ...
   fun:php_module_startup
}

{
   PHP_ModuleLoadingLeaks2
   Memcheck:Leak
   ...
   fun:php_load_shlib
}