Internalize rb_mjit_unit definition again

Fixed a TODO in b9007b6c54

iseq.c

@@ -359,10 +359,9 @@ rb_iseq_mark(const rb_iseq_t *iseq)
 	}
 
 #if USE_MJIT
-        if (body->jit_unit && body->jit_unit->cc_entries != NULL) {
+        if (body->jit_unit && mjit_iseq_cc_entries(body) != NULL) {
-            // TODO: move to mjit.c?
             for (unsigned int i=0; i<body->ci_size; i++) {
-                const struct rb_callcache *cc = body->jit_unit->cc_entries[i];
+                const struct rb_callcache *cc = mjit_iseq_cc_entries(body)[i];
                 if (cc != NULL) {
                     rb_gc_mark((VALUE)cc); // pindown
                 }

mjit.c

@@ -45,7 +45,7 @@ mjit_copy_job_handler(void *data)
         CRITICAL_SECTION_FINISH(3, "in mjit_copy_job_handler");
         return;
     }
-    else if (job->iseq == NULL) { // ISeq GC notified in mjit_mark_iseq
+    else if (job->iseq == NULL) { // ISeq GC notified in mjit_free_iseq
         job->finish_p = true;
         CRITICAL_SECTION_FINISH(3, "in mjit_copy_job_handler");
         return;
@@ -1019,6 +1019,12 @@ mjit_mark(void)
     RUBY_MARK_LEAVE("mjit");
 }
 
+const struct rb_callcache **
+mjit_iseq_cc_entries(const struct rb_iseq_constant_body *const body)
+{
+    return body->jit_unit->cc_entries;
+}
+
 // A hook to update valid_class_serials.
 void
 mjit_add_class_serial(rb_serial_t class_serial)

mjit.h

@@ -70,35 +70,6 @@ struct rb_mjit_compile_info {
     bool disable_inlining;
 };
 
-// The unit structure that holds metadata of ISeq for MJIT.
-struct rb_mjit_unit {
-    // Unique order number of unit.
-    int id;
-    // Dlopen handle of the loaded object file.
-    void *handle;
-    rb_iseq_t *iseq;
-#ifndef _MSC_VER
-    // This value is always set for `compact_all_jit_code`. Also used for lazy deletion.
-    char *o_file;
-    // true if it's inherited from parent Ruby process and lazy deletion should be skipped.
-    // `o_file = NULL` can't be used to skip lazy deletion because `o_file` could be used
-    // by child for `compact_all_jit_code`.
-    bool o_file_inherited_p;
-#endif
-#if defined(_WIN32)
-    // DLL cannot be removed while loaded on Windows. If this is set, it'll be lazily deleted.
-    char *so_file;
-#endif
-    // Only used by unload_units. Flag to check this unit is currently on stack or not.
-    char used_code_p;
-    struct list_node unode;
-    // mjit_compile's optimization switches
-    struct rb_mjit_compile_info compile_info;
-
-    // captured CC values, they should be marked with iseq.
-    const struct rb_callcache **cc_entries; // size: iseq->body->ci_size
-};
-
 typedef VALUE (*mjit_func_t)(rb_execution_context_t *, rb_control_frame_t *);
 
 RUBY_SYMBOL_EXPORT_BEGIN
@@ -122,6 +93,7 @@ extern struct mjit_cont *mjit_cont_new(rb_execution_context_t *ec);
 extern void mjit_cont_free(struct mjit_cont *cont);
 extern void mjit_add_class_serial(rb_serial_t class_serial);
 extern void mjit_remove_class_serial(rb_serial_t class_serial);
+const struct rb_callcache ** mjit_iseq_cc_entries(const struct rb_iseq_constant_body *const body);
 
 // A threshold used to reject long iseqs from JITting as such iseqs
 // takes too much time to be compiled.

mjit_compile.c

@@ -393,7 +393,7 @@ precompile_inlinable_iseqs(FILE *f, const rb_iseq_t *iseq, struct compile_status
         if (insn == BIN(opt_send_without_block)) { // `compile_inlined_cancel_handler` supports only `opt_send_without_block`
             CALL_DATA cd = (CALL_DATA)body->iseq_encoded[pos + 1];
             const struct rb_callinfo *ci = cd->ci;
-            const struct rb_callcache *cc = iseq->body->jit_unit->cc_entries[call_data_index(cd, body)]; // use copy to avoid race condition
+            const struct rb_callcache *cc = mjit_iseq_cc_entries(iseq->body)[call_data_index(cd, body)]; // use copy to avoid race condition
 
             const rb_iseq_t *child_iseq;
             if (has_valid_method_type(cc) &&

mjit_worker.c

@@ -135,6 +135,34 @@ typedef intptr_t pid_t;
 
 #define MJIT_TMP_PREFIX "_ruby_mjit_"
 
+// The unit structure that holds metadata of ISeq for MJIT.
+struct rb_mjit_unit {
+    // Unique order number of unit.
+    int id;
+    // Dlopen handle of the loaded object file.
+    void *handle;
+    rb_iseq_t *iseq;
+#ifndef _MSC_VER
+    // This value is always set for `compact_all_jit_code`. Also used for lazy deletion.
+    char *o_file;
+    // true if it's inherited from parent Ruby process and lazy deletion should be skipped.
+    // `o_file = NULL` can't be used to skip lazy deletion because `o_file` could be used
+    // by child for `compact_all_jit_code`.
+    bool o_file_inherited_p;
+#endif
+#if defined(_WIN32)
+    // DLL cannot be removed while loaded on Windows. If this is set, it'll be lazily deleted.
+    char *so_file;
+#endif
+    // Only used by unload_units. Flag to check this unit is currently on stack or not.
+    char used_code_p;
+    struct list_node unode;
+    // mjit_compile's optimization switches
+    struct rb_mjit_compile_info compile_info;
+    // captured CC values, they should be marked with iseq.
+    const struct rb_callcache **cc_entries; // size: iseq->body->ci_size
+};
+
 // Linked list of struct rb_mjit_unit.
 struct rb_mjit_unit_list {
     struct list_head head;
@@ -1184,7 +1212,7 @@ mjit_copy_cache_from_main_thread(const rb_iseq_t *iseq, union iseq_inline_storag
     job->finish_p = true;
 
     in_jit = true; // Prohibit GC during JIT compilation
-    if (job->iseq == NULL) // ISeq GC is notified in mjit_mark_iseq
+    if (job->iseq == NULL) // ISeq GC is notified in mjit_free_iseq
         success_p = false;
     job->iseq = NULL; // Allow future GC of this ISeq from here
     CRITICAL_SECTION_FINISH(3, "in mjit_copy_cache_from_main_thread");

tool/ruby_vm/views/_mjit_compile_send.erb

@@ -14,7 +14,7 @@
     MAYBE_UNUSED(<%= ope.fetch(:decl) %>) = (<%= ope.fetch(:type) %>)operands[<%= i %>];
 % end
 % # compiler: Use copied cc to avoid race condition
-    const struct rb_callcache *captured_cc = body->jit_unit->cc_entries[call_data_index(cd, body)];
+    const struct rb_callcache *captured_cc = mjit_iseq_cc_entries(body)[call_data_index(cd, body)];
 %
     if (!status->compile_info->disable_send_cache && has_valid_method_type(captured_cc)) {
         const rb_iseq_t *iseq;

tool/ruby_vm/views/mjit_compile.inc.erb

@@ -57,7 +57,7 @@ switch (insn) {
 %   when *send_compatible_opt_insns
 %     # To avoid cancel, just emit `opt_send_without_block` instead of `opt_*` insn if call cache is populated.
 %     cd_index = insn.opes.index { |o| o.fetch(:type) == 'CALL_DATA' }
-      if (has_valid_method_type(body->jit_unit->cc_entries[call_data_index((CALL_DATA)operands[<%= cd_index %>], body)])) {
+      if (has_valid_method_type(mjit_iseq_cc_entries(body)[call_data_index((CALL_DATA)operands[<%= cd_index %>], body)])) {
 <%=       render 'mjit_compile_send', locals: { insn: opt_send_without_block } -%>
 <%=       render 'mjit_compile_insn', locals: { insn: opt_send_without_block } -%>
           break;