From patchwork Mon Jul 22 11:43:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manos Pitsidianakis X-Patchwork-Id: 13738706 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A6296C3DA59 for ; Mon, 22 Jul 2024 11:44:55 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sVrSk-0000ZO-R5; Mon, 22 Jul 2024 07:44:19 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sVrSe-0000HF-Mv for qemu-devel@nongnu.org; Mon, 22 Jul 2024 07:44:12 -0400 Received: from mail-wr1-x42f.google.com ([2a00:1450:4864:20::42f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sVrSa-0002Pu-E0 for qemu-devel@nongnu.org; Mon, 22 Jul 2024 07:44:12 -0400 Received: by mail-wr1-x42f.google.com with SMTP id ffacd0b85a97d-367ab76d5e1so1434631f8f.3 for ; Mon, 22 Jul 2024 04:44:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1721648647; x=1722253447; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=wwiTk3Z9mHUcszlD0OzPJHLsnbDOmeY/fc7ksbFd1yk=; b=a4oAHV0cB+vCfqtTLzMDZZvHEHCBnRJwbms9oH9VUq9yVxvx3tMdi/ChVz1exeXpwa Wfab5onneO38LF7wve35bxWvH1Kk6ziDjFrjaPjhaDo0CcJUn8I00oG85dCy17r+xyuV tWUQRIdVyMfvtHEVsg5U6ljxe8rZx3oHhW8wmb5eH7bgbGi60QwJioBRKae0eH/GA/VY +JhCThv5H5mlx0XDisEIQqd8mRgCOGxyOHdhNGhloqBn+LskSbELLQ/AxRuoTKwcjXGT ifMJwADS++Dg71DpAXSNwPUdJVfkmY2hMsbVmLVGgqDDCCV0uqP6Ju7B6U+APZVsjV8g mWiA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721648647; x=1722253447; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=wwiTk3Z9mHUcszlD0OzPJHLsnbDOmeY/fc7ksbFd1yk=; b=s2h+ero9h6JMZOfnrOSjsHrHjLfbIzO8AaTe1hb8HAMtitG2iujD1I0/9rApFzKPW3 7SEK4PkUilvSPDkcKWSlIgmMATmySdtzGK4Tu3XtbAhM2UiMNKAd5PDNbsNvG1THeATz RzXwu4td1XWekEQEvW1n6j0dZdmksYlZZ+5BvxcB3CbqMSIeQ/48Lyle9ypK4RbG2AFa 0qnO8y6p7RjJ/HAcr5G2FeOWETAGpl8ckKr921sPD/cSs8RT8Ff/h/QmhrLaPfYHcNWH 3N+P/5LULO8NXmALqTtbLo8eNdXM0pGv9AdKIRh7Y9/83FvUaalBL/47tyiDSki+m8p8 FvNg== X-Gm-Message-State: AOJu0YyXYZR64m+vC90/QU1R4k0+1oaym69eufMaxKD4dv+2e8SwloTc dXl/Tj+pGQKxh0spcDAJ8JAOjiGXVqa6FsqHGd0Zorj5YGZl7BQSsa/dSqbZSI5kwk6fgpCZzst s3aU= X-Google-Smtp-Source: AGHT+IEDFxvwVRqqhRogjkUxluOq8eeF5vu2V8EZW52cqHuCtlEEWvJh8tYw51htAIbXuK/dJH+cHg== X-Received: by 2002:a5d:474f:0:b0:368:72c6:99c4 with SMTP id ffacd0b85a97d-369bbbb319bmr3907062f8f.10.1721648646685; Mon, 22 Jul 2024 04:44:06 -0700 (PDT) Received: from localhost.localdomain (adsl-231.37.6.1.tellas.gr. [37.6.1.231]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-368787eba8csm8323513f8f.91.2024.07.22.04.44.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jul 2024 04:44:06 -0700 (PDT) From: Manos Pitsidianakis To: qemu-devel@nongnu.org Cc: Stefan Hajnoczi , Mads Ynddal , Peter Maydell , =?utf-8?q?Alex_Benn=C3=A9e?= , =?utf-8?q?Daniel_P?= =?utf-8?q?=2E_Berrang=C3=A9?= , =?utf-8?q?Marc-Andr?= =?utf-8?q?=C3=A9_Lureau?= , Thomas Huth , Markus Armbruster , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Zhao Liu , Gustavo Romero , Pierrick Bouvier , rowan.hart@intel.com, Richard Henderson Subject: [RFC PATCH v5 6/8] rust: add crate to expose bindings and interfaces Date: Mon, 22 Jul 2024 14:43:36 +0300 Message-ID: <80d1a9356de96979a67cd6eaf0d37be6a6a553bd.1721648163.git.manos.pitsidianakis@linaro.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::42f; envelope-from=manos.pitsidianakis@linaro.org; helo=mail-wr1-x42f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add rust/qemu-api, which exposes rust-bindgen generated FFI bindings and provides some declaration macros for symbols visible to the rest of QEMU. Signed-off-by: Manos Pitsidianakis --- MAINTAINERS | 6 ++ rust/meson.build | 13 +++ rust/qemu-api/.gitignore | 2 + rust/qemu-api/Cargo.lock | 7 ++ rust/qemu-api/Cargo.toml | 23 ++++++ rust/qemu-api/README.md | 17 ++++ rust/qemu-api/build.rs | 13 +++ rust/qemu-api/meson.build | 19 +++++ rust/qemu-api/rustfmt.toml | 1 + rust/qemu-api/src/bindings.rs | 7 ++ rust/qemu-api/src/definitions.rs | 107 +++++++++++++++++++++++++ rust/qemu-api/src/device_class.rs | 128 ++++++++++++++++++++++++++++++ rust/qemu-api/src/lib.rs | 100 +++++++++++++++++++++++ rust/qemu-api/src/tests.rs | 48 +++++++++++ rust/rustfmt.toml | 7 ++ 15 files changed, 498 insertions(+) create mode 100644 rust/qemu-api/.gitignore create mode 100644 rust/qemu-api/Cargo.lock create mode 100644 rust/qemu-api/Cargo.toml create mode 100644 rust/qemu-api/README.md create mode 100644 rust/qemu-api/build.rs create mode 100644 rust/qemu-api/meson.build create mode 120000 rust/qemu-api/rustfmt.toml create mode 100644 rust/qemu-api/src/bindings.rs create mode 100644 rust/qemu-api/src/definitions.rs create mode 100644 rust/qemu-api/src/device_class.rs create mode 100644 rust/qemu-api/src/lib.rs create mode 100644 rust/qemu-api/src/tests.rs create mode 100644 rust/rustfmt.toml diff --git a/MAINTAINERS b/MAINTAINERS index 5f0b586dd4..1789bcfd9b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3342,6 +3342,12 @@ F: hw/core/register.c F: include/hw/register.h F: include/hw/registerfields.h +Rust +M: Manos Pitsidianakis +S: Maintained +F: rust/qemu-api +F: rust/rustfmt.toml + SLIRP M: Samuel Thibault S: Maintained diff --git a/rust/meson.build b/rust/meson.build index e69de29bb2..a903c7c602 100644 --- a/rust/meson.build +++ b/rust/meson.build @@ -0,0 +1,13 @@ +add_languages('rust', required: true) + +_lib_bindings_rs = static_library( + '_bindings_rs', + bindings_rs, + gnu_symbol_visibility: 'hidden', + rust_abi: 'rust', + rust_args: rust_args + [ + '--edition', '2021', + ], +) + +subdir('qemu-api') diff --git a/rust/qemu-api/.gitignore b/rust/qemu-api/.gitignore new file mode 100644 index 0000000000..71eaff2035 --- /dev/null +++ b/rust/qemu-api/.gitignore @@ -0,0 +1,2 @@ +# Ignore generated bindings file overrides. +src/bindings.rs.inc diff --git a/rust/qemu-api/Cargo.lock b/rust/qemu-api/Cargo.lock new file mode 100644 index 0000000000..e9c51a243a --- /dev/null +++ b/rust/qemu-api/Cargo.lock @@ -0,0 +1,7 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "qemu_api" +version = "0.1.0" diff --git a/rust/qemu-api/Cargo.toml b/rust/qemu-api/Cargo.toml new file mode 100644 index 0000000000..51260cbe42 --- /dev/null +++ b/rust/qemu-api/Cargo.toml @@ -0,0 +1,23 @@ +[package] +name = "qemu_api" +version = "0.1.0" +edition = "2021" +authors = ["Manos Pitsidianakis "] +license = "GPL-2.0 OR GPL-3.0-or-later" +readme = "README.md" +homepage = "https://www.qemu.org" +description = "Rust bindings for QEMU" +repository = "https://gitlab.com/qemu-project/qemu/" +resolver = "2" +publish = false +keywords = [] +categories = [] + +[dependencies] + +[features] +default = ["allocator"] +allocator = [] + +# Do not include in any global workspace +[workspace] diff --git a/rust/qemu-api/README.md b/rust/qemu-api/README.md new file mode 100644 index 0000000000..7588fa29ef --- /dev/null +++ b/rust/qemu-api/README.md @@ -0,0 +1,17 @@ +# QEMU bindings and API wrappers + +This library exports helper Rust types, Rust macros and C FFI bindings for internal QEMU APIs. + +The C bindings can be generated with `bindgen`, using this build target: + +```console +$ ninja bindings.rs +``` + +## Generate Rust documentation + +To generate docs for this crate, including private items: + +```sh +cargo doc --no-deps --document-private-items +``` diff --git a/rust/qemu-api/build.rs b/rust/qemu-api/build.rs new file mode 100644 index 0000000000..2f57c2b3d4 --- /dev/null +++ b/rust/qemu-api/build.rs @@ -0,0 +1,13 @@ +// Copyright 2024 Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0 OR GPL-3.0-or-later + +use std::path::Path; + +fn main() { + if !Path::new("src/bindings.rs.inc").exists() { + panic!( + "No generated C bindings found! Either build them manually with bindgen or with meson \ + (`ninja bindings.rs`) and copy them to src/bindings.rs.inc, or build through meson." + ); + } +} diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build new file mode 100644 index 0000000000..7992dc64ce --- /dev/null +++ b/rust/qemu-api/meson.build @@ -0,0 +1,19 @@ +add_languages('rust', required: true) + +_qemu_api_rs = static_library( + 'qemu_api', + [files('src/lib.rs')], + gnu_symbol_visibility: 'hidden', + rust_abi: 'rust', + rust_args: rust_args + [ + '--edition', '2021', + '--cfg', 'MESON_BINDINGS_RS', + ], + link_with: [ + _lib_bindings_rs, + ], +) + +qemu_api = declare_dependency( + link_with: _qemu_api_rs, +) diff --git a/rust/qemu-api/rustfmt.toml b/rust/qemu-api/rustfmt.toml new file mode 120000 index 0000000000..39f97b043b --- /dev/null +++ b/rust/qemu-api/rustfmt.toml @@ -0,0 +1 @@ +../rustfmt.toml \ No newline at end of file diff --git a/rust/qemu-api/src/bindings.rs b/rust/qemu-api/src/bindings.rs new file mode 100644 index 0000000000..fb595f1469 --- /dev/null +++ b/rust/qemu-api/src/bindings.rs @@ -0,0 +1,7 @@ +// Copyright 2024 Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0 OR GPL-3.0-or-later +#[cfg(not(MESON_BINDINGS_RS))] +include!("bindings.rs.inc"); + +#[cfg(MESON_BINDINGS_RS)] +pub use ::_bindings_rs::*; diff --git a/rust/qemu-api/src/definitions.rs b/rust/qemu-api/src/definitions.rs new file mode 100644 index 0000000000..5b9e92fda8 --- /dev/null +++ b/rust/qemu-api/src/definitions.rs @@ -0,0 +1,107 @@ +// Copyright 2024 Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0 OR GPL-3.0-or-later + +//! Definitions required by QEMU when registering a device. + +#[macro_export] +macro_rules! module_init { + ($func:expr, $type:expr) => { + #[used] + #[cfg_attr(target_os = "linux", link_section = ".ctors")] + #[cfg_attr(target_os = "macos", link_section = "__DATA,__mod_init_func")] + #[cfg_attr(target_os = "windows", link_section = ".CRT$XCU")] + pub static LOAD_MODULE: extern "C" fn() = { + assert!($type < $crate::bindings::module_init_type_MODULE_INIT_MAX); + + extern "C" fn __load() { + // ::std::panic::set_hook(::std::boxed::Box::new(|_| {})); + + unsafe { + $crate::bindings::register_module_init(Some($func), $type); + } + } + + __load + }; + }; + (qom: $func:ident => $body:block) => { + // NOTE: To have custom identifiers for the ctor func we need to either supply + // them directly as a macro argument or create them with a proc macro. + #[used] + #[cfg_attr(target_os = "linux", link_section = ".ctors")] + #[cfg_attr(target_os = "macos", link_section = "__DATA,__mod_init_func")] + #[cfg_attr(target_os = "windows", link_section = ".CRT$XCU")] + pub static LOAD_MODULE: extern "C" fn() = { + extern "C" fn __load() { + // ::std::panic::set_hook(::std::boxed::Box::new(|_| {})); + #[no_mangle] + unsafe extern "C" fn $func() { + $body + } + + unsafe { + $crate::bindings::register_module_init( + Some($func), + $crate::bindings::module_init_type_MODULE_INIT_QOM, + ); + } + } + + __load + }; + }; +} + +#[macro_export] +macro_rules! type_info { + ($(#[$outer:meta])* + $name:ident: $t:ty, + $(name: $tname:expr,)* + $(parent: $pname:expr,)* + $(instance_init: $ii_fn:expr,)* + $(instance_post_init: $ipi_fn:expr,)* + $(instance_finalize: $if_fn:expr,)* + $(abstract_: $a_val:expr,)* + $(class_init: $ci_fn:expr,)* + $(class_base_init: $cbi_fn:expr,)* + ) => { + #[used] + $(#[$outer])* + pub static $name: $crate::bindings::TypeInfo = $crate::bindings::TypeInfo { + $(name: { + #[used] + static TYPE_NAME: &::core::ffi::CStr = $tname; + $tname.as_ptr() + },)* + $(parent: { + #[used] + static PARENT_TYPE_NAME: &::core::ffi::CStr = $pname; + $pname.as_ptr() + },)* + instance_size: ::core::mem::size_of::<$t>(), + instance_align: ::core::mem::align_of::<$t>(), + $( + instance_init: $ii_fn, + )* + $( + instance_post_init: $ipi_fn, + )* + $( + instance_finalize: $if_fn, + )* + $( + abstract_: $a_val, + )* + class_size: 0, + $( + class_init: $ci_fn, + )* + $( + class_base_init: $cbi_fn, + )* + class_data: core::ptr::null_mut(), + interfaces: core::ptr::null_mut(), + ..unsafe { MaybeUninit::<$crate::bindings::TypeInfo>::zeroed().assume_init() } + }; + } +} diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_class.rs new file mode 100644 index 0000000000..f8d4c04e03 --- /dev/null +++ b/rust/qemu-api/src/device_class.rs @@ -0,0 +1,128 @@ +// Copyright 2024 Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0 OR GPL-3.0-or-later + +use std::sync::OnceLock; + +use crate::bindings::Property; + +#[macro_export] +macro_rules! device_class_init { + ($func:ident, props => $props:ident, realize_fn => $realize_fn:expr, reset_fn => $reset_fn:expr, vmsd => $vmsd:ident$(,)*) => { + #[no_mangle] + pub unsafe extern "C" fn $func( + klass: *mut $crate::bindings::ObjectClass, + _: *mut ::core::ffi::c_void, + ) { + let mut dc = + ::core::ptr::NonNull::new(klass.cast::<$crate::bindings::DeviceClass>()).unwrap(); + dc.as_mut().realize = $realize_fn; + dc.as_mut().reset = $reset_fn; + dc.as_mut().vmsd = &$vmsd; + $crate::bindings::device_class_set_props(dc.as_mut(), $props.as_mut_ptr()); + } + }; +} + +#[macro_export] +macro_rules! define_property { + ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr, default = $defval:expr$(,)*) => { + $crate::bindings::Property { + name: { + #[used] + static _TEMP: &::core::ffi::CStr = $name; + _TEMP.as_ptr() + }, + info: $prop, + offset: ::core::mem::offset_of!($state, $field) + .try_into() + .expect("Could not fit offset value to type"), + bitnr: 0, + bitmask: 0, + set_default: true, + defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval.into() }, + arrayoffset: 0, + arrayinfo: ::core::ptr::null(), + arrayfieldsize: 0, + link_type: ::core::ptr::null(), + } + }; + ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr$(,)*) => { + $crate::bindings::Property { + name: { + #[used] + static _TEMP: &::core::ffi::CStr = $name; + _TEMP.as_ptr() + }, + info: $prop, + offset: ::core::mem::offset_of!($state, $field) + .try_into() + .expect("Could not fit offset value to type"), + bitnr: 0, + bitmask: 0, + set_default: false, + defval: $crate::bindings::Property__bindgen_ty_1 { i: 0 }, + arrayoffset: 0, + arrayinfo: ::core::ptr::null(), + arrayfieldsize: 0, + link_type: ::core::ptr::null(), + } + }; +} + +#[repr(C)] +pub struct Properties(pub OnceLock<[Property; N]>, pub fn() -> [Property; N]); + +impl Properties { + pub fn as_mut_ptr(&mut self) -> *mut Property { + _ = self.0.get_or_init(self.1); + self.0.get_mut().unwrap().as_mut_ptr() + } +} + +#[macro_export] +macro_rules! declare_properties { + ($ident:ident, $($prop:expr),*$(,)*) => { + + const fn _calc_prop_len() -> usize { + let mut len = 1; + $({ + _ = stringify!($prop); + len += 1; + })* + len + } + const PROP_LEN: usize = _calc_prop_len(); + + #[no_mangle] + fn _make_properties() -> [$crate::bindings::Property; PROP_LEN] { + [ + $($prop),*, + unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Property>::zeroed().assume_init() }, + ] + } + + #[no_mangle] + pub static mut $ident: $crate::device_class::Properties = $crate::device_class::Properties(::std::sync::OnceLock::new(), _make_properties); + }; +} + +#[macro_export] +macro_rules! vm_state_description { + ($(#[$outer:meta])* + $name:ident, + $(name: $vname:expr,)* + $(unmigratable: $um_val:expr,)* + ) => { + #[used] + $(#[$outer])* + pub static $name: $crate::bindings::VMStateDescription = $crate::bindings::VMStateDescription { + $(name: { + #[used] + static VMSTATE_NAME: &::core::ffi::CStr = $vname; + $vname.as_ptr() + },)* + unmigratable: true, + ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::VMStateDescription>::zeroed().assume_init() } + }; + } +} diff --git a/rust/qemu-api/src/lib.rs b/rust/qemu-api/src/lib.rs new file mode 100644 index 0000000000..6f02ac45e2 --- /dev/null +++ b/rust/qemu-api/src/lib.rs @@ -0,0 +1,100 @@ +// Copyright 2024 Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0 OR GPL-3.0-or-later + +#![doc = include_str!("../README.md")] + +#[cfg(MESON_BINDINGS_RS)] +extern crate _bindings_rs; + +#[cfg_attr(not(MESON_BINDINGS_RS), allow( + improper_ctypes_definitions, + improper_ctypes, + non_camel_case_types, + non_snake_case, + non_upper_case_globals +))] +#[cfg_attr(not(MESON_BINDINGS_RS), allow( + clippy::missing_const_for_fn, + clippy::too_many_arguments, + clippy::approx_constant, + clippy::use_self, + clippy::useless_transmute, + clippy::missing_safety_doc, +))] +#[cfg_attr(not(MESON_BINDINGS_RS), rustfmt::skip)] +pub mod bindings; + +pub mod definitions; +pub mod device_class; + +#[cfg(test)] +mod tests; + +use std::alloc::{GlobalAlloc, Layout}; + +extern "C" { + pub fn g_aligned_alloc0( + n_blocks: bindings::gsize, + n_block_bytes: bindings::gsize, + alignment: bindings::gsize, + ) -> bindings::gpointer; + pub fn g_aligned_free(mem: bindings::gpointer); + pub fn g_malloc0(n_bytes: bindings::gsize) -> bindings::gpointer; + pub fn g_free(mem: bindings::gpointer); +} + +/// An allocator that uses the same allocator as QEMU in C. +/// +/// It is enabled by default with the `allocator` feature. +/// +/// To set it up manually as a global allocator in your crate: +/// +/// ```ignore +/// use qemu_api::QemuAllocator; +/// +/// #[global_allocator] +/// static GLOBAL: QemuAllocator = QemuAllocator::new(); +/// ``` +#[derive(Clone, Copy, Debug)] +#[repr(C)] +pub struct QemuAllocator { + _unused: [u8; 0], +} + +#[cfg_attr(feature = "allocator", global_allocator)] +pub static GLOBAL: QemuAllocator = QemuAllocator::new(); + +impl QemuAllocator { + pub const fn new() -> Self { + Self { _unused: [] } + } +} + +impl Default for QemuAllocator { + fn default() -> Self { + Self::new() + } +} + +unsafe impl GlobalAlloc for QemuAllocator { + unsafe fn alloc(&self, layout: Layout) -> *mut u8 { + if layout.align() == 0 { + g_malloc0(layout.size().try_into().unwrap()).cast::() + } else { + g_aligned_alloc0( + layout.size().try_into().unwrap(), + 1, + layout.align().try_into().unwrap(), + ) + .cast::() + } + } + + unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) { + if layout.align() == 0 { + g_free(ptr.cast::<_>()) + } else { + g_aligned_free(ptr.cast::<_>()) + } + } +} diff --git a/rust/qemu-api/src/tests.rs b/rust/qemu-api/src/tests.rs new file mode 100644 index 0000000000..88c26308ee --- /dev/null +++ b/rust/qemu-api/src/tests.rs @@ -0,0 +1,48 @@ +// Copyright 2024 Manos Pitsidianakis +// SPDX-License-Identifier: GPL-2.0 OR GPL-3.0-or-later + +use crate::{ + bindings::*, declare_properties, define_property, device_class_init, vm_state_description, +}; + +#[test] +fn test_device_decl_macros() { + // Test that macros can compile. + vm_state_description! { + VMSTATE, + name: c"name", + unmigratable: true, + } + + #[repr(C)] + pub struct DummyState { + pub char_backend: CharBackend, + pub migrate_clock: bool, + } + + declare_properties! { + DUMMY_PROPERTIES, + define_property!( + c"chardev", + DummyState, + char_backend, + unsafe { &qdev_prop_chr }, + CharBackend + ), + define_property!( + c"migrate-clk", + DummyState, + migrate_clock, + unsafe { &qdev_prop_bool }, + bool + ), + } + + device_class_init! { + dummy_class_init, + props => DUMMY_PROPERTIES, + realize_fn => None, + reset_fn => None, + vmsd => VMSTATE, + } +} diff --git a/rust/rustfmt.toml b/rust/rustfmt.toml new file mode 100644 index 0000000000..ebecb99fe0 --- /dev/null +++ b/rust/rustfmt.toml @@ -0,0 +1,7 @@ +edition = "2021" +format_generated_files = false +format_code_in_doc_comments = true +format_strings = true +imports_granularity = "Crate" +group_imports = "StdExternalCrate" +wrap_comments = true