Use UNALIGNED_MEMBER_PTR

* internal.h (UNALIGNED_MEMBER_ACCESS, UNALIGNED_MEMBER_PTR):
  moved from eval_intern.h.

* compile.c iseq.c, vm.c: use UNALIGNED_MEMBER_PTR for `entries`
  in `struct iseq_catch_table`.

* vm_eval.c, vm_insnhelper.c: use UNALIGNED_MEMBER_PTR for `body`
  in `rb_method_definition_t`.

compile.c

@@ -1263,7 +1263,8 @@ update_catch_except_flags(struct rb_iseq_constant_body *body)
         return;
 
     for (i = 0; i < ct->size; i++) {
-        const struct iseq_catch_table_entry *entry = &ct->entries[i];
+        const struct iseq_catch_table_entry *entry =
+            UNALIGNED_MEMBER_PTR(ct, entries[i]);
         if (entry->type != CATCH_TYPE_BREAK
             && entry->type != CATCH_TYPE_NEXT
             && entry->type != CATCH_TYPE_REDO) {
@@ -2322,7 +2323,7 @@ iseq_set_exception_table(rb_iseq_t *iseq)
 
 	for (i = 0; i < table->size; i++) {
             ptr = RARRAY_CONST_PTR_TRANSIENT(tptr[i]);
-	    entry = &table->entries[i];
+	    entry = UNALIGNED_MEMBER_PTR(table, entries[i]);
 	    entry->type = (enum catch_type)(ptr[0] & 0xffff);
 	    entry->start = label_get_position((LABEL *)(ptr[1] & ~1));
 	    entry->end = label_get_position((LABEL *)(ptr[2] & ~1));

eval_intern.h

@@ -157,23 +157,6 @@ LONG WINAPI rb_w32_stack_overflow_handler(struct _EXCEPTION_POINTERS *);
 # define VAR_NOCLOBBERED(var) var
 #endif
 
-#if defined(USE_UNALIGNED_MEMBER_ACCESS) && USE_UNALIGNED_MEMBER_ACCESS && \
-    (defined(__clang__) || GCC_VERSION_SINCE(9, 0, 0))
-# define UNALIGNED_MEMBER_ACCESS(expr) __extension__({ \
-    COMPILER_WARNING_PUSH; \
-    COMPILER_WARNING_IGNORED(-Waddress-of-packed-member); \
-    typeof(expr) unaligned_member_access_result = (expr); \
-    COMPILER_WARNING_POP; \
-    unaligned_member_access_result; \
-})
-#else
-# define UNALIGNED_MEMBER_ACCESS(expr) expr
-#endif
-#define UNALIGNED_MEMBER_PTR(ptr, mem) UNALIGNED_MEMBER_ACCESS(&(ptr)->mem)
-
-#undef RB_OBJ_WRITE
-#define RB_OBJ_WRITE(a, slot, b) UNALIGNED_MEMBER_ACCESS(rb_obj_write((VALUE)(a), (VALUE *)(slot), (VALUE)(b), __FILE__, __LINE__))
-
 /* clear ec->tag->state, and return the value */
 static inline int
 rb_ec_tag_state(const rb_execution_context_t *ec)

internal.h

@@ -2511,6 +2511,23 @@ rb_obj_builtin_type(VALUE obj)
 #define COMPILER_WARNING_PRAGMA(str) COMPILER_WARNING_PRAGMA_(str)
 #define COMPILER_WARNING_PRAGMA_(str) _Pragma(#str)
 
+#if defined(USE_UNALIGNED_MEMBER_ACCESS) && USE_UNALIGNED_MEMBER_ACCESS && \
+    (defined(__clang__) || GCC_VERSION_SINCE(9, 0, 0))
+# define UNALIGNED_MEMBER_ACCESS(expr) __extension__({ \
+    COMPILER_WARNING_PUSH; \
+    COMPILER_WARNING_IGNORED(-Waddress-of-packed-member); \
+    typeof(expr) unaligned_member_access_result = (expr); \
+    COMPILER_WARNING_POP; \
+    unaligned_member_access_result; \
+})
+#else
+# define UNALIGNED_MEMBER_ACCESS(expr) expr
+#endif
+#define UNALIGNED_MEMBER_PTR(ptr, mem) UNALIGNED_MEMBER_ACCESS(&(ptr)->mem)
+
+#undef RB_OBJ_WRITE
+#define RB_OBJ_WRITE(a, slot, b) UNALIGNED_MEMBER_ACCESS(rb_obj_write((VALUE)(a), (VALUE *)(slot), (VALUE)(b), __FILE__, __LINE__))
+
 #if defined(__cplusplus)
 #if 0
 { /* satisfy cc-mode */

iseq.c

@@ -256,7 +256,7 @@ rb_iseq_update_references(rb_iseq_t *iseq)
             unsigned int i;
             for(i = 0; i < table->size; i++) {
                 struct iseq_catch_table_entry *entry;
-                entry = &table->entries[i];
+                entry = UNALIGNED_MEMBER_PTR(table, entries[i]);
                 if (entry->iseq) {
                     entry->iseq = (rb_iseq_t *)rb_gc_location((VALUE)entry->iseq);
                 }
@@ -315,7 +315,7 @@ rb_iseq_mark(const rb_iseq_t *iseq)
 	    unsigned int i;
 	    for(i = 0; i < table->size; i++) {
 		const struct iseq_catch_table_entry *entry;
-		entry = &table->entries[i];
+		entry = UNALIGNED_MEMBER_PTR(table, entries[i]);
 		if (entry->iseq) {
                     rb_gc_mark_no_pin((VALUE)entry->iseq);
 		}
@@ -2138,7 +2138,8 @@ rb_iseq_disasm_recursive(const rb_iseq_t *iseq, VALUE indent)
 	rb_str_cat_cstr(indent, "| ");
 	indent_str = RSTRING_PTR(indent);
 	for (i = 0; i < body->catch_table->size; i++) {
-	    const struct iseq_catch_table_entry *entry = &body->catch_table->entries[i];
+	    const struct iseq_catch_table_entry *entry =
+		UNALIGNED_MEMBER_PTR(body->catch_table, entries[i]);
 	    rb_str_cat(str, indent_str, indent_len);
 	    rb_str_catf(str,
 			"| catch type: %-6s st: %04d ed: %04d sp: %04d cont: %04d\n",
@@ -2272,7 +2273,8 @@ iseq_iterate_children(const rb_iseq_t *iseq, void (*iter_func)(const rb_iseq_t *
 
     if (body->catch_table) {
         for (i = 0; i < body->catch_table->size; i++) {
-            const struct iseq_catch_table_entry *entry = &body->catch_table->entries[i];
+            const struct iseq_catch_table_entry *entry =
+                UNALIGNED_MEMBER_PTR(body->catch_table, entries[i]);
             child = entry->iseq;
             if (child) {
                 if (rb_hash_aref(all_children, (VALUE)child) == Qnil) {
@@ -2782,7 +2784,8 @@ iseq_data_to_ary(const rb_iseq_t *iseq)
     /* exception */
     if (iseq_body->catch_table) for (i=0; i<iseq_body->catch_table->size; i++) {
 	VALUE ary = rb_ary_new();
-	const struct iseq_catch_table_entry *entry = &iseq_body->catch_table->entries[i];
+	const struct iseq_catch_table_entry *entry =
+	    UNALIGNED_MEMBER_PTR(iseq_body->catch_table, entries[i]);
 	rb_ary_push(ary, exception_type2symbol(entry->type));
 	if (entry->iseq) {
 	    rb_ary_push(ary, iseq_data_to_ary(rb_iseq_check(entry->iseq)));

thread_sync.c

@@ -903,7 +903,7 @@ queue_do_pop(VALUE self, struct rb_queue *q, int should_block)
 
 	    qw.w.th = GET_THREAD();
 	    qw.as.q = q;
-	    list_add_tail(&qw.as.q->waitq, &qw.w.node);
+	    list_add_tail(queue_waitq(qw.as.q), &qw.w.node);
 	    qw.as.q->num_waiting++;
 
 	    rb_ensure(queue_sleep, self, queue_sleep_done, (VALUE)&qw);

vm.c

@@ -1956,7 +1956,7 @@ vm_exec_handle_exception(rb_execution_context_t *ec, enum ruby_tag_type state,
 		    else {
 			ct = cfp->iseq->body->catch_table;
 			if (ct) for (i = 0; i < ct->size; i++) {
-			    entry = &ct->entries[i];
+			    entry = UNALIGNED_MEMBER_PTR(ct, entries[i]);
 			    if (entry->start < epc && entry->end >= epc) {
 				if (entry->type == CATCH_TYPE_ENSURE) {
 				    catch_iseq = entry->iseq;
@@ -1992,7 +1992,7 @@ vm_exec_handle_exception(rb_execution_context_t *ec, enum ruby_tag_type state,
 	if (state == TAG_RAISE) {
 	    ct = cfp->iseq->body->catch_table;
 	    if (ct) for (i = 0; i < ct->size; i++) {
-		entry = &ct->entries[i];
+		entry = UNALIGNED_MEMBER_PTR(ct, entries[i]);
 		if (entry->start < epc && entry->end >= epc) {
 
 		    if (entry->type == CATCH_TYPE_RESCUE ||
@@ -2008,7 +2008,7 @@ vm_exec_handle_exception(rb_execution_context_t *ec, enum ruby_tag_type state,
 	else if (state == TAG_RETRY) {
 	    ct = cfp->iseq->body->catch_table;
 	    if (ct) for (i = 0; i < ct->size; i++) {
-		entry = &ct->entries[i];
+		entry = UNALIGNED_MEMBER_PTR(ct, entries[i]);
 		if (entry->start < epc && entry->end >= epc) {
 
 		    if (entry->type == CATCH_TYPE_ENSURE) {
@@ -2035,7 +2035,7 @@ vm_exec_handle_exception(rb_execution_context_t *ec, enum ruby_tag_type state,
 	  search_restart_point:
 	    ct = cfp->iseq->body->catch_table;
 	    if (ct) for (i = 0; i < ct->size; i++) {
-		entry = &ct->entries[i];
+		entry = UNALIGNED_MEMBER_PTR(ct, entries[i]);
 
 		if (entry->start < epc && entry->end >= epc) {
 		    if (entry->type == CATCH_TYPE_ENSURE) {
@@ -2073,7 +2073,7 @@ vm_exec_handle_exception(rb_execution_context_t *ec, enum ruby_tag_type state,
 	else {
 	    ct = cfp->iseq->body->catch_table;
 	    if (ct) for (i = 0; i < ct->size; i++) {
-		entry = &ct->entries[i];
+		entry = UNALIGNED_MEMBER_PTR(ct, entries[i]);
 		if (entry->start < epc && entry->end >= epc) {
 
 		    if (entry->type == CATCH_TYPE_ENSURE) {

vm_eval.c

@@ -65,7 +65,7 @@ vm_call0_cfunc_with_frame(rb_execution_context_t* ec, struct rb_calling_info *ca
 {
     VALUE val;
     const rb_callable_method_entry_t *me = cc->me;
-    const rb_method_cfunc_t *cfunc = &me->def->body.cfunc;
+    const rb_method_cfunc_t *cfunc = UNALIGNED_MEMBER_PTR(me->def, body.cfunc);
     int len = cfunc->argc;
     VALUE recv = calling->recv;
     int argc = calling->argc;

vm_insnhelper.c

@@ -1201,7 +1201,8 @@ vm_throw_start(const rb_execution_context_t *ec, rb_control_frame_t *const reg_c
 
 		    if (!ct) break;
 		    for (i=0; i < ct->size; i++) {
-			const struct iseq_catch_table_entry * const entry = &ct->entries[i];
+			const struct iseq_catch_table_entry *const entry =
+			    UNALIGNED_MEMBER_PTR(ct, entries[i]);
 
 			if (entry->type == CATCH_TYPE_BREAK &&
 			    entry->iseq == base_iseq &&
@@ -2183,7 +2184,7 @@ vm_method_cfunc_entry(const rb_callable_method_entry_t *me)
 	rb_bug("wrong method type: %d", me->def->type);
     }
 #endif
-    return &me->def->body.cfunc;
+    return UNALIGNED_MEMBER_PTR(me->def, body.cfunc);
 }
 
 static VALUE