Fix phpGH-18534: FPM exit code 70 with enabled opcache and hooked properties in traits

The trait handling for property hooks in preloading did not exist, we
add a check to skip trait clones and we add the necessary code to update
the op arrays.

Author: nielsdos

Zend/Optimizer/zend_optimizer.c

@@ -1579,7 +1579,7 @@ void zend_foreach_op_array(zend_script *script, zend_op_array_func_t func, void
 			if (property->ce == ce && property->hooks) {
 				for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
 					zend_function *hook = hooks[i];
-					if (hook && hook->common.scope == ce) {
+					if (hook && hook->common.scope == ce && !(hooks[i]->op_array.fn_flags & ZEND_ACC_TRAIT_CLONE)) {
 						zend_foreach_op_array_helper(&hooks[i]->op_array, func, context);
 					}
 				}

Zend/zend_inheritance.c

@@ -2976,6 +2976,7 @@ static void zend_do_traits_property_binding(zend_class_entry *ce, zend_class_ent
 					}
 				}
 				ce->ce_flags |= ZEND_ACC_USE_GUARDS;
+				ce->num_hooked_props++;
 			}
 		} ZEND_HASH_FOREACH_END();
 	}

ext/opcache/ZendAccelerator.c

@@ -4202,36 +4202,75 @@ static void preload_remove_empty_includes(void)
 
 static void preload_register_trait_methods(zend_class_entry *ce) {
 	zend_op_array *op_array;
+	zend_property_info *info;
+
 	ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
 		if (!(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
 			ZEND_ASSERT(op_array->refcount && "Must have refcount pointer");
 			zend_shared_alloc_register_xlat_entry(op_array->refcount, op_array);
 		}
 	} ZEND_HASH_FOREACH_END();
+
+	if (ce->num_hooked_props > 0) {
+		ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, info) {
+			if (info->hooks) {
+				for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
+					if (info->hooks[i]) {
+						op_array = &info->hooks[i]->op_array;
+						if (!(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
+							ZEND_ASSERT(op_array->refcount && "Must have refcount pointer");
+							zend_shared_alloc_register_xlat_entry(op_array->refcount, op_array);
+						}
+					}
+				}
+			}
+		} ZEND_HASH_FOREACH_END();
+	}
+}
+
+static void preload_fix_trait_op_array(zend_op_array *op_array)
+{
+	if (!(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
+		return;
+	}
+
+	zend_op_array *orig_op_array = zend_shared_alloc_get_xlat_entry(op_array->refcount);
+	ZEND_ASSERT(orig_op_array && "Must be in xlat table");
+
+	zend_string *function_name = op_array->function_name;
+	zend_class_entry *scope = op_array->scope;
+	uint32_t fn_flags = op_array->fn_flags;
+	zend_function *prototype = op_array->prototype;
+	HashTable *ht = op_array->static_variables;
+	*op_array = *orig_op_array;
+	op_array->function_name = function_name;
+	op_array->scope = scope;
+	op_array->fn_flags = fn_flags;
+	op_array->prototype = prototype;
+	op_array->static_variables = ht;
 }
 
 static void preload_fix_trait_methods(zend_class_entry *ce)
 {
 	zend_op_array *op_array;
 
 	ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
-		if (op_array->fn_flags & ZEND_ACC_TRAIT_CLONE) {
-			zend_op_array *orig_op_array = zend_shared_alloc_get_xlat_entry(op_array->refcount);
-			ZEND_ASSERT(orig_op_array && "Must be in xlat table");
-
-			zend_string *function_name = op_array->function_name;
-			zend_class_entry *scope = op_array->scope;
-			uint32_t fn_flags = op_array->fn_flags;
-			zend_function *prototype = op_array->prototype;
-			HashTable *ht = op_array->static_variables;
-			*op_array = *orig_op_array;
-			op_array->function_name = function_name;
-			op_array->scope = scope;
-			op_array->fn_flags = fn_flags;
-			op_array->prototype = prototype;
-			op_array->static_variables = ht;
-		}
+		preload_fix_trait_op_array(op_array);
 	} ZEND_HASH_FOREACH_END();
+
+	if (ce->num_hooked_props > 0) {
+		zend_property_info *info;
+		ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, info) {
+			if (info->hooks) {
+				for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
+					if (info->hooks[i]) {
+						op_array = &info->hooks[i]->op_array;
+						preload_fix_trait_op_array(op_array);
+					}
+				}
+			}
+		} ZEND_HASH_FOREACH_END();
+	}
 }
 
 static void preload_optimize(zend_persistent_script *script)

ext/opcache/tests/gh18534.phpt

@@ -0,0 +1,21 @@
+--TEST--
+GH-18534 (FPM exit code 70 with enabled opcache and hooked properties in traits)
+--EXTENSIONS--
+opcache
+--SKIPIF--
+<?php if (PHP_OS_FAMILY === 'Windows') die('skip preloading does not work on Windows'); ?>
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.preload={PWD}/gh18534_preload.inc
+--FILE--
+<?php
+
+require_once __DIR__ . '/gh18534_preload.inc';
+
+$test = new DummyModel;
+var_dump($test->dummyProperty2);
+
+?>
+--EXPECT--
+NULL

ext/opcache/tests/gh18534_preload.inc

@@ -0,0 +1,13 @@
+<?php
+
+trait DummyTrait
+{
+    public ?string $dummyProperty2 {
+        get => null;
+    }
+}
+
+class DummyModel
+{
+    use DummyTrait;
+}