src/hotspot/cpu/s390/templateInterpreterGenerator_s390.cpp

*** 1,7 ***
  /*
!  * Copyright (c) 2016, 2025, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2016, 2024 SAP SE. 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
--- 1,7 ---
  /*
!  * Copyright (c) 2016, 2026, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2016, 2024 SAP SE. 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

*** 1682,11 ***
  }
  
  //
  // Generic interpreted method entry to template interpreter.
  //
! address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
    address entry_point = __ pc();
  
    bool inc_counter = UseCompiler || CountCompiledCalls;
  
    // Interpreter entry for ordinary Java methods.
--- 1682,11 ---
  }
  
  //
  // Generic interpreted method entry to template interpreter.
  //
! address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized, bool object_init) {
    address entry_point = __ pc();
  
    bool inc_counter = UseCompiler || CountCompiledCalls;
  
    // Interpreter entry for ordinary Java methods.

*** 1803,10 ***
--- 1803,16 ---
        __ bind(L);
      }
  #endif // ASSERT
    }
  
+   // If object_init == true, we should insert a StoreStore barrier here to
+   // prevent strict fields initial default values from being observable.
+   // However, s390 is a TSO platform, so if `this` escapes, strict fields
+   // initialized values are guaranteed to be the ones observed, so the
+   // barrier can be elided.
+ 
    // start execution
  
  #ifdef ASSERT
    __ verify_esp(Z_esp, Z_R1_scratch);
  #endif