Fix exit hook for php 8.4

ext/src/swow_coroutine.c

@@ -2509,6 +2509,36 @@ static int swow_coroutine_exit_handler(zend_execute_data *execute_data)
 
     return ZEND_USER_OPCODE_CONTINUE;
 }
+#else
+// from php/php-src@bc07a8a28a084a9bd2637b8232b75d1634a5872e Zend/zend_builtin_functions.c L72
+static PHP_FUNCTION(swow_exit)
+{
+    swow_coroutine_t *s_coroutine = swow_coroutine_get_current();
+    zend_string *str = NULL;
+    zend_long status = 0;
+
+    ZEND_PARSE_PARAMETERS_START(0, 1)
+        Z_PARAM_OPTIONAL
+        Z_PARAM_STR_OR_LONG(str, status)
+    ZEND_PARSE_PARAMETERS_END();
+
+    if (str) {
+        size_t len = ZSTR_LEN(str);
+        if (len != 0) {
+            /* An exception might be emitted by an output handler */
+            zend_write(ZSTR_VAL(str), len);
+            if (EG(exception)) {
+                RETURN_THROWS();
+            }
+        }
+    } else {
+        EG(exit_status) = status;
+        s_coroutine->exit_status = status;
+    }
+
+    ZEND_ASSERT(!EG(exception));
+    zend_throw_unwind_exit();
+}
 #endif // ZEND_EXIT
 
 /* hook silence */
@@ -2681,6 +2711,11 @@ zend_result swow_coroutine_module_init(INIT_FUNC_ARGS)
 # ifdef ZEND_EXIT
     /* hook opcode exit */
     zend_set_user_opcode_handler(ZEND_EXIT, swow_coroutine_exit_handler);
+# else
+    /* hook function exit */
+    if (!swow_hook_internal_function_handler(CAT_STRL("exit"), PHP_FN(swow_exit))) {
+        return FAILURE;
+    }
 # endif // ZEND_EXIT
 # ifdef SWOW_COROUTINE_SWAP_SILENCE_CONTEXT
     /* hook opcode silence */

ext/tests/swow_coroutine/exit.phpt

@@ -3,6 +3,7 @@ swow_coroutine: exit
 --SKIPIF--
 <?php
 require __DIR__ . '/../include/skipif.php';
+needs_php_version('<', '8.4');
 ?>
 --FILE--
 <?php

ext/tests/swow_coroutine/exit_84.phpt

@@ -0,0 +1,59 @@
+--TEST--
+swow_coroutine: exit
+--SKIPIF--
+<?php
+require __DIR__ . '/../include/skipif.php';
+needs_php_version('>=', '8.4');
+?>
+--FILE--
+<?php
+require __DIR__ . '/../include/bootstrap.php';
+
+$coroutine = Swow\Coroutine::run(static function (): void {
+    echo "0\n";
+    exit;
+    /* @noinspection PhpUnreachableStatementInspection */
+    echo "Never here\n";
+});
+Assert::same($coroutine->getExitStatus(), 0);
+
+$coroutine = Swow\Coroutine::run(static function (): void {
+    echo "1\n";
+    exit(0);
+    /* @noinspection PhpUnreachableStatementInspection */
+    echo "Never here\n";
+});
+Assert::same($coroutine->getExitStatus(), 0);
+
+$coroutine = Swow\Coroutine::run(static function (): void {
+    echo "2\n";
+    exit(null);
+    /* @noinspection PhpUnreachableStatementInspection */
+    echo "Never here\n";
+});
+Assert::same($coroutine->getExitStatus(), 0);
+
+$coroutine = Swow\Coroutine::run(static function (): void {
+    echo "3\n";
+    exit(1);
+    /* @noinspection PhpUnreachableStatementInspection */
+    echo "Never here\n";
+});
+Assert::same($coroutine->getExitStatus(), 1);
+
+echo "Done\n";
+
+?>
+--EXPECTF--
+0
+1
+2
+%Aeprecated: [Deprecated in R%d] exit(): Passing null to parameter #1 ($status) of type string|int is deprecated
+Stack trace:
+#0 %sexit_84.php(%d): exit(NULL)
+#1 [internal function]: {closure:%sexit_84.php:%d}()
+#2 %sexit_84.php(%d): Swow\Coroutine::run(Object(Closure))
+#3 {main}
+  triggered in %sexit_84.php on line %d
+3
+Done