runtime.md

r[runtime]

The Rust runtime

This section documents features that define some aspects of the Rust runtime.

r[runtime.global_allocator]

The global_allocator attribute

The global_allocator attribute is used on a static item implementing the GlobalAlloc trait to set the global allocator.

r[runtime.windows_subsystem]

The windows_subsystem attribute

r[runtime.windows_subsystem.intro] The windows_subsystem attribute may be applied at the crate level to set the subsystem when linking on a Windows target.

r[runtime.windows_subsystem.syntax] It uses the MetaNameValueStr syntax to specify the subsystem with a value of either console or windows.

r[runtime.windows_subsystem.ignored] This attribute is ignored on non-Windows targets, and for non-bin crate types.

r[runtime.windows_subsystem.console] The "console" subsystem is the default. If a console process is run from an existing console then it will be attached to that console, otherwise a new console window will be created.

r[runtime.windows_subsystem.windows] The "windows" subsystem is commonly used by GUI applications that do not want to display a console window on startup. It will run detached from any existing console.

#![windows_subsystem = "windows"]

<script> (function() { var fragments = { "#the-panic_handler-attribute": "panic.html#the-panic_handler-attribute", }; var target = fragments[window.location.hash]; if (target) { var url = window.location.toString(); var base = url.substring(0, url.lastIndexOf('/')); window.location.replace(base + "/" + target); } })(); </script>