src/hotspot/share/services/diagnosticArgument.cpp

*** 135,144 ****
--- 135,146 ----
    }
  }
  
  template <> void DCmdArgument<jlong>::destroy_value() { }
  
+ PRAGMA_DIAG_PUSH
+ PRAGMA_STRINGOP_TRUNCATION_IGNORED
  template <> void DCmdArgument<bool>::parse_value(const char* str,
                                                   size_t len, TRAPS) {
    // len is the length of the current token starting at str
    if (len == 0) {
      set_value(true);
*** 149,165 ****
--- 151,172 ----
         set_value(false);
      } else {
        ResourceMark rm;
  
        char* buf = NEW_RESOURCE_ARRAY(char, len + 1);
+ 
+       // This code would be warned as "stringop-truncatino" by GCC 8 or later.
+       // So we avoid it via PRAGMA_STRINGOP_TRUNCATION_IGNORED macro.
        strncpy(buf, str, len);
+ 
        buf[len] = '\0';
        Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(),
          "Boolean parsing error in command argument '%s'. Could not parse: %s.\n", _name, buf);
      }
    }
  }
+ PRAGMA_DIAG_POP
  
  template <> void DCmdArgument<bool>::init_value(TRAPS) {
    if (has_default()) {
      this->parse_value(_default_string, strlen(_default_string), THREAD);
      if (HAS_PENDING_EXCEPTION) {