src/hotspot/cpu/x86/compressedKlass_x86.cpp

@@ -1,6 +1,6 @@
- /*
+  /*
   * Copyright (c) 2023, 2025, Red Hat, Inc. All rights reserved.
   * Copyright (c) 2023, 2025, 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

@@ -32,11 +32,11 @@
  char* CompressedKlassPointers::reserve_address_space_for_compressed_classes(size_t size, bool aslr, bool optimize_for_zero_base) {
  
    char* result = nullptr;
  
    assert(CompressedKlassPointers::narrow_klass_pointer_bits() == 32 ||
-          CompressedKlassPointers::narrow_klass_pointer_bits() == 22, "Rethink if we ever use different nKlass bit sizes");
+          CompressedKlassPointers::narrow_klass_pointer_bits() == 19, "Rethink if we ever use different nKlass bit sizes");
  
    // Unconditionally attempting to reserve in lower 4G first makes always sense:
    // -CDS -COH: Try to get unscaled mode (zero base, zero shift)
    // +CDS -COH: No zero base possible (CDS prevents it); but we still benefit from small base pointers (imm32 movabs)
    // -CDS +COH: No zero base possible (22bit nKlass + zero base zero shift = 4MB encoding range, way too small);