--- a/vm.c
+++ b/vm.c
@@ -728,6 +728,15 @@
 #ifdef RB_THREAD_LOCAL_SPECIFIER
 RB_THREAD_LOCAL_SPECIFIER rb_execution_context_t *ruby_current_ec;
 
+#if defined(__linux__) && defined(__ELF__) && \
+    (defined(__x86_64__) || defined(__aarch64__)) && \
+    (defined(__GNUC__) || defined(__clang__)) && \
+    RBIMPL_HAS_ATTRIBUTE(alias) && RBIMPL_HAS_ATTRIBUTE(visibility)
+/* Best-effort debugging symbol: same TLS storage, not a public C API. */
+extern RB_THREAD_LOCAL_SPECIFIER __typeof__(ruby_current_ec) ruby_debug_current_ec
+    __attribute__((alias("ruby_current_ec"), visibility("protected")));
+#endif
+
 #ifdef RUBY_NT_SERIAL
 RB_THREAD_LOCAL_SPECIFIER rb_atomic_t ruby_nt_serial;
 #endif
@@ -2938,6 +2947,15 @@
     return result;
 }
 
+#if defined(__linux__) && defined(__ELF__) && \
+    (defined(__x86_64__) || defined(__aarch64__)) && \
+    (defined(__GNUC__) || defined(__clang__)) && \
+    RBIMPL_HAS_ATTRIBUTE(alias) && RBIMPL_HAS_ATTRIBUTE(visibility)
+/* vm_exec is macro-renamed to the actual assembler symbol rb_vm_exec above. */
+extern __typeof__(vm_exec) ruby_debug_vm_exec
+    __attribute__((alias("rb_vm_exec"), visibility("protected")));
+#endif
+
 static inline VALUE
 vm_exec_loop(rb_execution_context_t *ec, enum ruby_tag_type state,
              struct rb_vm_tag *tag, VALUE result)
--- a/symbol.c
+++ b/symbol.c
@@ -92,6 +92,15 @@
     .next_id = tNEXT_ID,
 };
 
+#if defined(__linux__) && defined(__ELF__) && \
+    (defined(__x86_64__) || defined(__aarch64__)) && \
+    (defined(__GNUC__) || defined(__clang__)) && \
+    RBIMPL_HAS_ATTRIBUTE(alias) && RBIMPL_HAS_ATTRIBUTE(visibility)
+/* Best-effort debugging symbol: the original table storage, never a copy. */
+extern __typeof__(ruby_global_symbols) ruby_debug_global_symbols
+    __attribute__((alias("ruby_global_symbols"), visibility("protected")));
+#endif
+
 struct sym_set_static_sym_entry {
     VALUE sym;
     VALUE str;