src/hotspot/share/code/scopeDesc.cpp

rev 60137 : 8227745: Enable Escape Analysis for Better Performance in the Presence of JVMTI Agents
Reviewed-by: mdoerr, goetz

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2016, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -28,27 +28,20 @@
 #include "code/scopeDesc.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.inline.hpp"
 
-ScopeDesc::ScopeDesc(const CompiledMethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool rethrow_exception, bool return_oop) {
+ScopeDesc::ScopeDesc(const CompiledMethod* code, PcDesc* pd, bool ignore_objects) {
+  int obj_decode_offset = ignore_objects ? DebugInformationRecorder::serialized_null : pd->obj_decode_offset();
   _code          = code;
-  _decode_offset = decode_offset;
+  _decode_offset = pd->scope_decode_offset();
   _objects       = decode_object_values(obj_decode_offset);
-  _reexecute     = reexecute;
-  _rethrow_exception = rethrow_exception;
-  _return_oop    = return_oop;
-  decode_body();
-}
-
-ScopeDesc::ScopeDesc(const CompiledMethod* code, int decode_offset, bool reexecute, bool rethrow_exception, bool return_oop) {
-  _code          = code;
-  _decode_offset = decode_offset;
-  _objects       = decode_object_values(DebugInformationRecorder::serialized_null);
-  _reexecute     = reexecute;
-  _rethrow_exception = rethrow_exception;
-  _return_oop    = return_oop;
+  _reexecute     = pd->should_reexecute();
+  _rethrow_exception = pd->rethrow_exception();
+  _return_oop    = pd->return_oop();
+  _not_global_escape_in_scope = ignore_objects ? false : pd->not_global_escape_in_scope();
+  _arg_escape    = ignore_objects ? false : pd->arg_escape();
   decode_body();
 }
 
 
 void ScopeDesc::initialize(const ScopeDesc* parent, int decode_offset) {

@@ -56,10 +49,12 @@
   _decode_offset = decode_offset;
   _objects       = parent->_objects;
   _reexecute     = false; //reexecute only applies to the first scope
   _rethrow_exception = false;
   _return_oop    = false;
+  _not_global_escape_in_scope = parent->not_global_escape_in_scope();
+  _arg_escape    = false;
   decode_body();
 }
 
 ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
   initialize(parent, parent->_sender_decode_offset);