PHP Embed SAPI not saving and restoring signal handlers.

Description

I would expect the the execution context to be restored following the PHP_EMBED_END_BLOCK() macro, but this doesn't seem to be the case for signal handlers.

here is a toy function to call a php function from a specified file:

/* Early work to call a php function from a specified script file */
void
call_php_function(char *file_name, char *function_name)
{
    zend_file_handle file_handle;
    zval retval = {0};
    zend_fcall_info fci = {0};
    zend_fcall_info_cache fci_cache = {0};

    sigset_t       oldsigset;
    struct sigaction oldsigaction[32] = {0,};

    some_signal_save_function(&oldsigset, oldsigaction);

    PHP_EMBED_START_BLOCK(0, NULL)
        zend_stream_init_filename(&file_handle, file_name);

        php_execute_script(&file_handle);

        ZVAL_STRING(&fci.function_name, function_name);

        fci.size = sizeof fci;
        fci.retval = &retval;

        zend_call_function(&fci, &fci_cache);
    PHP_EMBED_END_BLOCK()

    some_signal_restore_function(&oldsigset, oldsigaction);
}

Without the signal save/restore wrapping the embed block, the zend_signal_handler and defer handler is still handling the dispatching of signals, which is likely not what a user would want once outside an embed block.

PHP Version

7.4.27

Operating System

No response

PHP_EMBED_START_BLOCK() マクロと PHP_EMBED_END_BLOCK() マクロから始め、zend_signal_handler と defer handler がどのようにインストールおよび削除されるかを追跡します。embed block の前後でシグナル状態を比較します。PHP_EMBED_END_BLOCK() の後に、シグナルハンドラと遅延シグナル処理が周囲のプロセスに対して復元されていれば完了です。