Fixed Bug GH-8863: RW operation on readonly property doesn't throw with JIT

Author: dstogov

ext/opcache/jit/zend_jit_helpers.c

@@ -2558,6 +2558,11 @@ static void ZEND_FASTCALL zend_jit_assign_op_to_typed_prop(zval *zptr, zend_prop
 	zend_execute_data *execute_data = EG(current_execute_data);
 	zval z_copy;
 
+	if (UNEXPECTED(prop_info->flags & ZEND_ACC_READONLY)) {
+		zend_readonly_property_modification_error(prop_info);
+		return;
+	}
+
 	ZVAL_DEREF(zptr);
 	/* Make sure that in-place concatenation is used if the LHS is a string. */
 	if (binary_op == concat_function && Z_TYPE_P(zptr) == IS_STRING) {

ext/opcache/tests/jit/gh8863.phpt

@@ -0,0 +1,33 @@
+--TEST--
+Bug GH-8863: RW operation on readonly property doesn't throw with JIT
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.file_update_protection=0
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Test {
+    public readonly int $prop;
+
+    public function __construct() {
+        $this->prop = 1;
+    }
+
+    public function rw() {
+        $this->prop += 1;
+        echo "Done\n";
+    }
+}
+
+$test = new Test();
+try {
+    $test->rw();
+} catch (Error $e) {
+    echo $e->getMessage(), "\n";
+}
+?>
+DONE
+--EXPECT--
+Cannot modify readonly property Test::$prop
+DONE