Merge branch 'PHP-8.4' into PHP-8.5

# Conflicts:
#	ext/opcache/jit/zend_jit_ir.c

Author: iliaal

ext/opcache/jit/zend_jit_ir.c

@@ -7979,14 +7979,12 @@ static int zend_jit_escape_if_undef(zend_jit_ctx *jit, int var, uint32_t flags,
 	zend_jit_op_array_trace_extension *jit_extension =
 		(zend_jit_op_array_trace_extension*)ZEND_FUNC_INFO(op_array);
 	size_t offset = jit_extension->offset;
-	ir_ref ref = ir_CONST_ADDR(ZEND_OP_TRACE_INFO((opline - 1), offset)->orig_handler);
+	ir_ref ref = ir_CONST_FC_FUNC(ZEND_OP_TRACE_INFO((opline - 1), offset)->orig_handler);
 	if (GCC_GLOBAL_REGS || ZEND_VM_KIND == ZEND_VM_KIND_TAILCALL) {
 		ir_TAILCALL(IR_OPCODE_HANDLER_RET, ref);
 	} else {
-#if defined(IR_TARGET_X86)
-		ref = ir_CAST_FC_FUNC(ref);
-#endif
-		ir_TAILCALL_2(IR_ADDR, ref, jit_FP(jit), jit_IP(jit));
+		ir_ref opline_ref = ir_CALL_2(IR_OPCODE_HANDLER_RET, ref, jit_FP(jit), jit_IP(jit));
+		zend_jit_vm_enter(jit, opline_ref);
 	}
 
 	ir_IF_TRUE(if_def);

ext/opcache/tests/jit/gh21368_call_vm.phpt

@@ -0,0 +1,36 @@
+--TEST--
+GH-21368 (JIT escape_if_undef SEGV on CALL VM with aggressive trace counters)
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=64M
+opcache.jit=tracing
+opcache.protect_memory=1
+opcache.jit_hot_loop=1
+opcache.jit_hot_func=1
+opcache.jit_hot_return=1
+opcache.jit_hot_side_exit=1
+--FILE--
+<?php
+class C {
+    public $x = true;
+    public function __get($name) { return null; }
+    public function getX() { return $this->x; }
+}
+
+$o1 = new C;
+$o2 = new C;
+$o2->x = false;
+$o3 = new C;
+unset($o3->x);
+$a = [$o1, $o2, $o3];
+
+for ($i = 0; $i < 8; $i++) {
+    $m = $a[$i % 3];
+    $m->getX();
+    $m->getX();
+}
+?>
+OK
+--EXPECT--
+OK