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rust: add utility procedural macro crate 

This commit adds a helper crate library, qemu-api-macros for derive (and
other procedural) macros to be used along qemu-api.

It needs to be a separate library because in Rust, procedural macros, or
macros that can generate arbitrary code, need to be special separate
compilation units.

Only one macro is introduced in this patch, #[derive(Object)]. It
generates a constructor to register a QOM TypeInfo on init and it must
be used on types that implement qemu_api::definitions::ObjectImpl trait.

Reviewed-by: Junjie Mao <junjie.mao@hotmail.com>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Link: https://lore.kernel.org/r/dd645642406a6dc2060c6f3f17db2bc77ed67b59.1727961605.git.manos.pitsidianakis@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Manos Pitsidianakis 2024-10-03 16:28:50 +03:00 committed by Paolo Bonzini
parent 474dcfc0ab
commit 2b74dd9180
19 changed files with 304 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
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@ -3295,6 +3295,7 @@ Rust
M: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
S: Maintained
F: rust/qemu-api
F: rust/qemu-api-macros
F: rust/rustfmt.toml
SLIRP

1
rust/meson.build
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@ -1 +1,2 @@
subdir('qemu-api-macros')
subdir('qemu-api')

47
rust/qemu-api-macros/Cargo.lock generated Normal file
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@ -0,0 +1,47 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "proc-macro2"
version = "1.0.86"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
dependencies = [
"unicode-ident",
]
[[package]]
name = "qemu_api_macros"
version = "0.1.0"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "quote"
version = "1.0.36"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
dependencies = [
"proc-macro2",
]
[[package]]
name = "syn"
version = "2.0.72"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dc4b9b9bf2add8093d3f2c0204471e951b2285580335de42f9d2534f3ae7a8af"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "unicode-ident"
version = "1.0.12"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"

25
rust/qemu-api-macros/Cargo.toml Normal file
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@ -0,0 +1,25 @@
[package]
name = "qemu_api_macros"
version = "0.1.0"
edition = "2021"
authors = ["Manos Pitsidianakis <manos.pitsidianakis@linaro.org>"]
license = "GPL-2.0-or-later"
readme = "README.md"
homepage = "https://www.qemu.org"
description = "Rust bindings for QEMU - Utility macros"
repository = "https://gitlab.com/qemu-project/qemu/"
resolver = "2"
publish = false
keywords = []
categories = []
[lib]
proc-macro = true
[dependencies]
proc-macro2 = "1"
quote = "1"
syn = "2"
# Do not include in any global workspace
[workspace]

1
rust/qemu-api-macros/README.md Normal file
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@ -0,0 +1 @@
# `qemu-api-macros` - Utility macros for defining QEMU devices

25
rust/qemu-api-macros/meson.build Normal file
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@ -0,0 +1,25 @@
add_languages('rust', required: true, native: true)
quote_dep = dependency('quote-1-rs', native: true)
syn_dep = dependency('syn-2-rs', native: true)
proc_macro2_dep = dependency('proc-macro2-1-rs', native: true)
_qemu_api_macros_rs = import('rust').proc_macro(
'qemu_api_macros',
files('src/lib.rs'),
override_options: ['rust_std=2021', 'build.rust_std=2021'],
rust_args: [
'--cfg', 'use_fallback',
'--cfg', 'feature="syn-error"',
'--cfg', 'feature="proc-macro"',
],
dependencies: [
proc_macro2_dep,
quote_dep,
syn_dep,
],
)
qemu_api_macros = declare_dependency(
link_with: _qemu_api_macros_rs,
)

43
rust/qemu-api-macros/src/lib.rs Normal file
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@ -0,0 +1,43 @@
// Copyright 2024, Linaro Limited
// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
// SPDX-License-Identifier: GPL-2.0-or-later
use proc_macro::TokenStream;
use quote::{format_ident, quote};
use syn::{parse_macro_input, DeriveInput};
#[proc_macro_derive(Object)]
pub fn derive_object(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
let name = input.ident;
let module_static = format_ident!("__{}_LOAD_MODULE", name);
let expanded = quote! {
#[allow(non_upper_case_globals)]
#[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 #module_static: extern "C" fn() = {
extern "C" fn __register() {
unsafe {
::qemu_api::bindings::type_register_static(&<#name as ::qemu_api::definitions::ObjectImpl>::TYPE_INFO);
}
}
extern "C" fn __load() {
unsafe {
::qemu_api::bindings::register_module_init(
Some(__register),
::qemu_api::bindings::module_init_type::MODULE_INIT_QOM
);
}
}
__load
};
};
TokenStream::from(expanded)
}

3
rust/qemu-api/meson.build
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@ -14,6 +14,9 @@ _qemu_api_rs = static_library(
'--cfg', 'MESON',
# '--cfg', 'feature="allocator"',
],
dependencies: [
qemu_api_macros,
],
)
qemu_api = declare_dependency(

4
scripts/archive-source.sh
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@ -26,7 +26,9 @@ sub_file="${sub_tdir}/submodule.tar"
# independent of what the developer currently has initialized
# in their checkout, because the build environment is completely
# different to the host OS.
subprojects="keycodemapdb libvfio-user berkeley-softfloat-3 berkeley-testfloat-3"
subprojects="keycodemapdb libvfio-user berkeley-softfloat-3
berkeley-testfloat-3 proc-macro2-1-rs quote-1-rs
syn-2-rs unicode-ident-1-rs"
sub_deinit=""
function cleanup() {

4
scripts/make-release
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@ -17,7 +17,9 @@ if [ $# -ne 2 ]; then
fi
# Only include wraps that are invoked with subproject()
SUBPROJECTS="libvfio-user keycodemapdb berkeley-softfloat-3 berkeley-testfloat-3"
SUBPROJECTS="libvfio-user keycodemapdb berkeley-softfloat-3
berkeley-testfloat-3 proc-macro2-1-rs quote-1-rs
syn-2-rs unicode-ident-1-rs"
src="$1"
version="$2"

4
subprojects/.gitignore vendored
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@ -6,3 +6,7 @@
/keycodemapdb
/libvfio-user
/slirp
/proc-macro2-1.0.84
/quote-1.0.36
/syn-2.0.66
/unicode-ident-1.0.12

31
subprojects/packagefiles/proc-macro2-1-rs/meson.build Normal file
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@ -0,0 +1,31 @@
project('proc-macro2-1-rs', 'rust',
version: '1.0.84',
license: 'MIT OR Apache-2.0',
default_options: [])
subproject('unicode-ident-1-rs', required: true)
unicode_ident_dep = dependency('unicode-ident-1-rs', native: true)
_proc_macro2_rs = static_library(
'proc_macro2',
files('src/lib.rs'),
gnu_symbol_visibility: 'hidden',
override_options: ['rust_std=2021', 'build.rust_std=2021'],
rust_abi: 'rust',
rust_args: [
'--cfg', 'feature="proc-macro"',
'--cfg', 'span_locations',
'--cfg', 'wrap_proc_macro',
],
dependencies: [
unicode_ident_dep,
],
native: true,
)
proc_macro2_dep = declare_dependency(
link_with: _proc_macro2_rs,
)
meson.override_dependency('proc-macro2-1-rs', proc_macro2_dep, native: true)

29
subprojects/packagefiles/quote-1-rs/meson.build Normal file
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@ -0,0 +1,29 @@
project('quote-1-rs', 'rust',
version: '1.12.0',
license: 'MIT OR Apache-2.0',
default_options: [])
subproject('proc-macro2-1-rs', required: true)
proc_macro2_dep = dependency('proc-macro2-1-rs', native: true)
_quote_rs = static_library(
'quote',
files('src/lib.rs'),
gnu_symbol_visibility: 'hidden',
override_options: ['rust_std=2021', 'build.rust_std=2021'],
rust_abi: 'rust',
rust_args: [
'--cfg', 'feature="proc-macro"',
],
dependencies: [
proc_macro2_dep,
],
native: true,
)
quote_dep = declare_dependency(
link_with: _quote_rs,
)
meson.override_dependency('quote-1-rs', quote_dep, native: true)

40
subprojects/packagefiles/syn-2-rs/meson.build Normal file
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@ -0,0 +1,40 @@
project('syn-2-rs', 'rust',
version: '2.0.66',
license: 'MIT OR Apache-2.0',
default_options: [])
subproject('proc-macro2-1-rs', required: true)
subproject('quote-1-rs', required: true)
subproject('unicode-ident-1-rs', required: true)
proc_macro2_dep = dependency('proc-macro2-1-rs', native: true)
quote_dep = dependency('quote-1-rs', native: true)
unicode_ident_dep = dependency('unicode-ident-1-rs', native: true)
_syn_rs = static_library(
'syn',
files('src/lib.rs'),
gnu_symbol_visibility: 'hidden',
override_options: ['rust_std=2021', 'build.rust_std=2021'],
rust_abi: 'rust',
rust_args: [
'--cfg', 'feature="full"',
'--cfg', 'feature="derive"',
'--cfg', 'feature="parsing"',
'--cfg', 'feature="printing"',
'--cfg', 'feature="clone-impls"',
'--cfg', 'feature="proc-macro"',
],
dependencies: [
quote_dep,
proc_macro2_dep,
unicode_ident_dep,
],
native: true,
)
syn_dep = declare_dependency(
link_with: _syn_rs,
)
meson.override_dependency('syn-2-rs', syn_dep, native: true)

7
subprojects/proc-macro2-1-rs.wrap Normal file
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@ -0,0 +1,7 @@
[wrap-file]
directory = proc-macro2-1.0.84
source_url = https://crates.io/api/v1/crates/proc-macro2/1.0.84/download
source_filename = proc-macro2-1.0.84.0.tar.gz
source_hash = ec96c6a92621310b51366f1e28d05ef11489516e93be030060e5fc12024a49d6
#method = cargo
patch_directory = proc-macro2-1-rs

7
subprojects/quote-1-rs.wrap Normal file
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@ -0,0 +1,7 @@
[wrap-file]
directory = quote-1.0.36
source_url = https://crates.io/api/v1/crates/quote/1.0.36/download
source_filename = quote-1.0.36.0.tar.gz
source_hash = 0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7
#method = cargo
patch_directory = quote-1-rs

7
subprojects/syn-2-rs.wrap Normal file
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@ -0,0 +1,7 @@
[wrap-file]
directory = syn-2.0.66
source_url = https://crates.io/api/v1/crates/syn/2.0.66/download
source_filename = syn-2.0.66.0.tar.gz
source_hash = c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5
#method = cargo
patch_directory = syn-2-rs

7
subprojects/unicode-ident-1-rs.wrap Normal file
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@ -0,0 +1,7 @@
[wrap-file]
directory = unicode-ident-1.0.12
source_url = https://crates.io/api/v1/crates/unicode-ident/1.0.12/download
source_filename = unicode-ident-1.0.12.tar.gz
source_hash = 3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b
#method = cargo
patch_directory = unicode-ident-1-rs

20
subprojects/unicode-ident-1-rs/meson.build Normal file
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@ -0,0 +1,20 @@
project('unicode-ident-1-rs', 'rust',
version: '1.0.12',
license: '(MIT OR Apache-2.0) AND Unicode-DFS-2016',
default_options: [])
_unicode_ident_rs = static_library(
'unicode_ident',
files('src/lib.rs'),
gnu_symbol_visibility: 'hidden',
override_options: ['rust_std=2021', 'build.rust_std=2021'],
rust_abi: 'rust',
dependencies: [],
native: true,
)
unicode_ident_dep = declare_dependency(
link_with: _unicode_ident_rs,
)
meson.override_dependency('unicode-ident-1-rs', unicode_ident_dep, native: true)