--- old/src/hotspot/os/solaris/os_solaris.cpp	2020-02-19 21:28:10.929423729 -0500
+++ new/src/hotspot/os/solaris/os_solaris.cpp	2020-02-19 21:28:09.236404979 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2020, 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
@@ -539,13 +539,6 @@
   BREAKPOINT;
 }
 
-bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
-  address  stackStart  = (address)thread->stack_base();
-  address  stackEnd    = (address)(stackStart - (address)thread->stack_size());
-  if (sp < stackStart && sp >= stackEnd) return true;
-  return false;
-}
-
 extern "C" void breakpoint() {
   // use debugger to set breakpoint here
 }