8057623: add an extension class for argument handling

Reviewed-by: brutisso, mgerdin, tschatzl

src/share/vm/runtime/arguments.cpp

@@ -35,6 +35,7 @@
 #include "oops/oop.inline.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "runtime/arguments.hpp"
+#include "runtime/arguments_ext.hpp"
 #include "runtime/globals_extension.hpp"
 #include "runtime/java.hpp"
 #include "services/management.hpp"
@@ -1544,7 +1545,7 @@ void Arguments::select_gc_ergonomically() {
 
 void Arguments::select_gc() {
   if (!gc_selected()) {
-    select_gc_ergonomically();
+    ArgumentsExt::select_gc_ergonomically();
   }
 }
 
@@ -2033,7 +2034,7 @@ bool Arguments::verify_MaxHeapFreeRatio(FormatBuffer<80>& err_msg, uintx max_hea
 }
 
 // Check consistency of GC selection
-bool Arguments::check_gc_consistency() {
+bool Arguments::check_gc_consistency_user() {
   check_gclog_consistency();
   bool status = true;
   // Ensure that the user has not selected conflicting sets
@@ -2199,7 +2200,7 @@ bool Arguments::check_vm_args_consistency() {
     FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
   }
 
-  status = status && check_gc_consistency();
+  status = status && ArgumentsExt::check_gc_consistency_user();
   status = status && check_stack_pages();
 
   if (CMSIncrementalMode) {
@@ -2447,8 +2448,6 @@ bool Arguments::check_vm_args_consistency() {
     warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
   }
 
-  status &= check_vm_args_consistency_ext();
-
   return status;
 }
 
@@ -3419,7 +3418,7 @@ jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_req
     }
   }
 
-  if (!check_vm_args_consistency()) {
+  if (!ArgumentsExt::check_vm_args_consistency()) {
     return JNI_ERR;
   }
 
@@ -3793,7 +3792,7 @@ jint Arguments::apply_ergo() {
   set_shared_spaces_flags();
 
   // Check the GC selections again.
-  if (!check_gc_consistency()) {
+  if (!ArgumentsExt::check_gc_consistency_ergo()) {
     return JNI_EINVAL;
   }
 

src/share/vm/runtime/arguments.hpp

@@ -465,12 +465,12 @@ class Arguments : AllStatic {
   static bool verify_MaxHeapFreeRatio(FormatBuffer<80>& err_msg, uintx max_heap_free_ratio);
 
   // Check for consistency in the selection of the garbage collector.
-  static bool check_gc_consistency();
+  static bool check_gc_consistency_user();        // Check user-selected gc
+  static inline bool check_gc_consistency_ergo(); // Check ergonomic-selected gc
   static void check_deprecated_gcs();
   static void check_deprecated_gc_flags();
   // Check consistecy or otherwise of VM argument settings
   static bool check_vm_args_consistency();
-  static bool check_vm_args_consistency_ext();
   // Check stack pages settings
   static bool check_stack_pages();
   // Used by os_solaris
@@ -611,4 +611,9 @@ bool Arguments::gc_selected() {
   return UseConcMarkSweepGC || UseG1GC || UseParallelGC || UseParallelOldGC ||
     UseParNewGC || UseSerialGC;
 }
+
+bool Arguments::check_gc_consistency_ergo() {
+  return check_gc_consistency_user();
+}
+
 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP

src/share/vm/runtime/arguments_ext.cpp → src/share/vm/runtime/arguments_ext.hpp

@@ -22,9 +22,34 @@
  *
  */
 
-#include "precompiled.hpp"
+#ifndef SHARE_VM_RUNTIME_ARGUMENTS_EXT_HPP
+#define SHARE_VM_RUNTIME_ARGUMENTS_EXT_HPP
+
+#include "memory/allocation.hpp"
 #include "runtime/arguments.hpp"
 
-bool Arguments::check_vm_args_consistency_ext() {
-  return true;
+class ArgumentsExt: AllStatic {
+public:
+  static inline void select_gc_ergonomically();
+  static inline bool check_gc_consistency_user();
+  static inline bool check_gc_consistency_ergo();
+  static inline bool check_vm_args_consistency();
+};
+
+void ArgumentsExt::select_gc_ergonomically() {
+  Arguments::select_gc_ergonomically();
 }
+
+bool ArgumentsExt::check_gc_consistency_user() {
+  return Arguments::check_gc_consistency_user();
+}
+
+bool ArgumentsExt::check_gc_consistency_ergo() {
+  return Arguments::check_gc_consistency_ergo();
+}
+
+bool ArgumentsExt::check_vm_args_consistency() {
+  return Arguments::check_vm_args_consistency();
+}
+
+#endif // SHARE_VM_RUNTIME_ARGUMENTS_EXT_HPP