src/hotspot/share/runtime/commandLineFlagConstraintsRuntime.cpp

rev 47415 : Add Thread Local handshakes and thread local polling

*** 1,7 ****
  /*
!  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 25,34 ****
--- 25,35 ----
  #include "precompiled.hpp"
  #include "runtime/arguments.hpp"
  #include "runtime/commandLineFlagConstraintsRuntime.hpp"
  #include "runtime/commandLineFlagRangeList.hpp"
  #include "runtime/globals.hpp"
+ #include "runtime/safepointMechanism.hpp"
  #include "runtime/task.hpp"
  #include "utilities/defaultStream.hpp"
  
  Flag::Error ObjectAlignmentInBytesConstraintFunc(intx value, bool verbose) {
    if (!is_power_of_2(value)) {
*** 128,132 ****
--- 129,147 ----
      return Flag::VIOLATES_CONSTRAINT;
    } else {
      return Flag::SUCCESS;
    }
  }
+ 
+ Flag::Error ThreadLocalHandshakesConstraintFunc(bool value, bool verbose) {
+   if (value) {
+     if (!SafepointMechanism::supports_thread_local_poll()) {
+       CommandLineError::print(verbose, "ThreadLocalHandshakes not yet supported on this platform\n");
+       return Flag::VIOLATES_CONSTRAINT;
+     }
+     if (UseAOT JVMCI_ONLY(|| EnableJVMCI || UseJVMCICompiler)) {
+       CommandLineError::print(verbose, "ThreadLocalHandshakes not yet supported in combination with AOT or JVMCI\n");
+       return Flag::VIOLATES_CONSTRAINT;
+     }
+   }
+   return Flag::SUCCESS;
+ }