Fix public table offsets larger than 32 bits (#8135)

docs/CONTRIBUTORS

@@ -354,3 +354,4 @@ Zixi Li
 Zubin Jain
 Àlex Torregrosa
 Ícaro Lima
+Sunimali Rathnayake

include/verilated.h

@@ -165,7 +165,7 @@ enum VerilatedVarFlags : uint32_t {
 struct VlVarTableEntry final {
     static constexpr int kMaxDims = 3;  // Max packed+unpacked dims a table row holds
     const char* namep;  // VPI-facing (protected) variable name, string literal
-    uint32_t byteOffset;  // offsetof of storage member from module instance base
+    size_t byteOffset;  // offsetof of storage member from module instance base
     VerilatedVarType vltype;
     uint32_t vlflags;  // Direction + flags (VLVD_*/VLVF_*)
     uint8_t udims;  // udims + pdims <= kMaxDims
@@ -865,7 +865,7 @@ public:  // But internals only - called from verilated modules, VerilatedSyms
 // One scope, consumed by VerilatedScope::scopesConstructFromTable(); replaces
 // per-scope 'new VerilatedScope{...}' statements, which compiles faster at scale.
 struct VlScopeTableEntry final {
-    uint32_t ptrOffset;  // offsetof of the target __Vscopep_* member within the Syms object
+    size_t ptrOffset;  // offsetof of the target __Vscopep_* member within the Syms object
     const char* namep;  // Scope suffix name (protected), string literal
     const char* identp;  // Identifier with escapes removed (protected)
     const char* defnamep;  // Definition name (SCOPE_MODULE only), else "<null>"

test_regress/t/t_public_flat_rw_large_offset.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of either the GNU Lesser General Public License Version 3
+# or the Perl Artistic License Version 2.0.
+# SPDX-FileCopyrightText: 2026 Wilson Snyder
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+import vltest_bootstrap
+
+test.scenarios('simulator')
+
+test.compile(verilator_flags2=["--public-flat-rw -CFLAGS -Werror"])
+
+test.passes()

test_regress/t/t_public_flat_rw_large_offset.v

@@ -0,0 +1,11 @@
+// DESCRIPTION: Verilator: Test public variable offsets larger than 32 bits
+//
+// This file ONLY is placed under the Creative Commons Public Domain.
+// SPDX-FileCopyrightText: 2026 Wilson Snyder
+// SPDX-License-Identifier: CC0-1.0
+
+module t;
+  longint padding1[1<<28];
+  longint padding2[1<<28];
+  longint padding3[1<<28];
+endmodule