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-rw-r--r--rust/hw/char/pl011/Cargo.toml3
-rw-r--r--rust/hw/char/pl011/src/device.rs103
-rw-r--r--rust/hw/char/pl011/src/device_class.rs103
-rw-r--r--rust/hw/char/pl011/src/lib.rs1
-rw-r--r--rust/hw/timer/hpet/Cargo.toml3
-rw-r--r--rust/qemu-api-macros/meson.build3
-rw-r--r--rust/qemu-api-macros/src/bits.rs58
-rw-r--r--rust/qemu-api-macros/src/lib.rs93
-rw-r--r--rust/qemu-api-macros/src/tests.rs137
-rw-r--r--rust/qemu-api-macros/src/utils.rs26
-rw-r--r--rust/qemu-api/build.rs12
-rw-r--r--rust/qemu-api/src/bindings.rs4
-rw-r--r--rust/qemu-api/src/log.rs92
13 files changed, 399 insertions, 239 deletions
diff --git a/rust/hw/char/pl011/Cargo.toml b/rust/hw/char/pl011/Cargo.toml
index 003ef96..88ef110 100644
--- a/rust/hw/char/pl011/Cargo.toml
+++ b/rust/hw/char/pl011/Cargo.toml
@@ -12,9 +12,6 @@ license.workspace = true
repository.workspace = true
rust-version.workspace = true
-[lib]
-crate-type = ["staticlib"]
-
[dependencies]
bilge = { version = "0.2.0" }
bilge-impl = { version = "0.2.0" }
diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs
index 5b53f26..ceb71dd 100644
--- a/rust/hw/char/pl011/src/device.rs
+++ b/rust/hw/char/pl011/src/device.rs
@@ -2,9 +2,14 @@
// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
// SPDX-License-Identifier: GPL-2.0-or-later
-use std::{ffi::CStr, mem::size_of};
+use std::{
+ ffi::{c_int, c_void, CStr},
+ mem::size_of,
+ ptr::NonNull,
+};
use qemu_api::{
+ bindings::{qdev_prop_bool, qdev_prop_chr},
chardev::{CharBackend, Chardev, Event},
impl_vmstate_forward,
irq::{IRQState, InterruptSource},
@@ -18,12 +23,11 @@ use qemu_api::{
sysbus::{SysBusDevice, SysBusDeviceImpl},
uninit_field_mut,
vmstate::VMStateDescription,
+ vmstate_clock, vmstate_fields, vmstate_of, vmstate_struct, vmstate_subsections, vmstate_unused,
+ zeroable::Zeroable,
};
-use crate::{
- device_class,
- registers::{self, Interrupt, RegisterOffset},
-};
+use crate::registers::{self, Interrupt, RegisterOffset};
// TODO: You must disable the UART before any of the control registers are
// reprogrammed. When the UART is disabled in the middle of transmission or
@@ -173,10 +177,10 @@ impl ObjectImpl for PL011State {
impl DeviceImpl for PL011State {
fn properties() -> &'static [Property] {
- &device_class::PL011_PROPERTIES
+ &PL011_PROPERTIES
}
fn vmsd() -> Option<&'static VMStateDescription> {
- Some(&device_class::VMSTATE_PL011)
+ Some(&VMSTATE_PL011)
}
const REALIZE: Option<fn(&Self) -> qemu_api::Result<()>> = Some(Self::realize);
}
@@ -712,3 +716,88 @@ impl PL011Impl for PL011Luminary {
impl DeviceImpl for PL011Luminary {}
impl ResettablePhasesImpl for PL011Luminary {}
impl SysBusDeviceImpl for PL011Luminary {}
+
+extern "C" fn pl011_clock_needed(opaque: *mut c_void) -> bool {
+ let state = NonNull::new(opaque).unwrap().cast::<PL011State>();
+ unsafe { state.as_ref().migrate_clock }
+}
+
+/// Migration subsection for [`PL011State`] clock.
+static VMSTATE_PL011_CLOCK: VMStateDescription = VMStateDescription {
+ name: c"pl011/clock".as_ptr(),
+ version_id: 1,
+ minimum_version_id: 1,
+ needed: Some(pl011_clock_needed),
+ fields: vmstate_fields! {
+ vmstate_clock!(PL011State, clock),
+ },
+ ..Zeroable::ZERO
+};
+
+extern "C" fn pl011_post_load(opaque: *mut c_void, version_id: c_int) -> c_int {
+ let state = NonNull::new(opaque).unwrap().cast::<PL011State>();
+ let result = unsafe { state.as_ref().post_load(version_id as u32) };
+ if result.is_err() {
+ -1
+ } else {
+ 0
+ }
+}
+
+static VMSTATE_PL011_REGS: VMStateDescription = VMStateDescription {
+ name: c"pl011/regs".as_ptr(),
+ version_id: 2,
+ minimum_version_id: 2,
+ fields: vmstate_fields! {
+ vmstate_of!(PL011Registers, flags),
+ vmstate_of!(PL011Registers, line_control),
+ vmstate_of!(PL011Registers, receive_status_error_clear),
+ vmstate_of!(PL011Registers, control),
+ vmstate_of!(PL011Registers, dmacr),
+ vmstate_of!(PL011Registers, int_enabled),
+ vmstate_of!(PL011Registers, int_level),
+ vmstate_of!(PL011Registers, read_fifo),
+ vmstate_of!(PL011Registers, ilpr),
+ vmstate_of!(PL011Registers, ibrd),
+ vmstate_of!(PL011Registers, fbrd),
+ vmstate_of!(PL011Registers, ifl),
+ vmstate_of!(PL011Registers, read_pos),
+ vmstate_of!(PL011Registers, read_count),
+ vmstate_of!(PL011Registers, read_trigger),
+ },
+ ..Zeroable::ZERO
+};
+
+pub static VMSTATE_PL011: VMStateDescription = VMStateDescription {
+ name: c"pl011".as_ptr(),
+ version_id: 2,
+ minimum_version_id: 2,
+ post_load: Some(pl011_post_load),
+ fields: vmstate_fields! {
+ vmstate_unused!(core::mem::size_of::<u32>()),
+ vmstate_struct!(PL011State, regs, &VMSTATE_PL011_REGS, BqlRefCell<PL011Registers>),
+ },
+ subsections: vmstate_subsections! {
+ VMSTATE_PL011_CLOCK
+ },
+ ..Zeroable::ZERO
+};
+
+qemu_api::declare_properties! {
+ PL011_PROPERTIES,
+ qemu_api::define_property!(
+ c"chardev",
+ PL011State,
+ char_backend,
+ unsafe { &qdev_prop_chr },
+ CharBackend
+ ),
+ qemu_api::define_property!(
+ c"migrate-clk",
+ PL011State,
+ migrate_clock,
+ unsafe { &qdev_prop_bool },
+ bool,
+ default = true
+ ),
+}
diff --git a/rust/hw/char/pl011/src/device_class.rs b/rust/hw/char/pl011/src/device_class.rs
deleted file mode 100644
index d328d84..0000000
--- a/rust/hw/char/pl011/src/device_class.rs
+++ /dev/null
@@ -1,103 +0,0 @@
-// Copyright 2024, Linaro Limited
-// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-use std::{
- ffi::{c_int, c_void},
- ptr::NonNull,
-};
-
-use qemu_api::{
- bindings::{qdev_prop_bool, qdev_prop_chr},
- prelude::*,
- vmstate::VMStateDescription,
- vmstate_clock, vmstate_fields, vmstate_of, vmstate_struct, vmstate_subsections, vmstate_unused,
- zeroable::Zeroable,
-};
-
-use crate::device::{PL011Registers, PL011State};
-
-extern "C" fn pl011_clock_needed(opaque: *mut c_void) -> bool {
- let state = NonNull::new(opaque).unwrap().cast::<PL011State>();
- unsafe { state.as_ref().migrate_clock }
-}
-
-/// Migration subsection for [`PL011State`] clock.
-static VMSTATE_PL011_CLOCK: VMStateDescription = VMStateDescription {
- name: c"pl011/clock".as_ptr(),
- version_id: 1,
- minimum_version_id: 1,
- needed: Some(pl011_clock_needed),
- fields: vmstate_fields! {
- vmstate_clock!(PL011State, clock),
- },
- ..Zeroable::ZERO
-};
-
-extern "C" fn pl011_post_load(opaque: *mut c_void, version_id: c_int) -> c_int {
- let state = NonNull::new(opaque).unwrap().cast::<PL011State>();
- let result = unsafe { state.as_ref().post_load(version_id as u32) };
- if result.is_err() {
- -1
- } else {
- 0
- }
-}
-
-static VMSTATE_PL011_REGS: VMStateDescription = VMStateDescription {
- name: c"pl011/regs".as_ptr(),
- version_id: 2,
- minimum_version_id: 2,
- fields: vmstate_fields! {
- vmstate_of!(PL011Registers, flags),
- vmstate_of!(PL011Registers, line_control),
- vmstate_of!(PL011Registers, receive_status_error_clear),
- vmstate_of!(PL011Registers, control),
- vmstate_of!(PL011Registers, dmacr),
- vmstate_of!(PL011Registers, int_enabled),
- vmstate_of!(PL011Registers, int_level),
- vmstate_of!(PL011Registers, read_fifo),
- vmstate_of!(PL011Registers, ilpr),
- vmstate_of!(PL011Registers, ibrd),
- vmstate_of!(PL011Registers, fbrd),
- vmstate_of!(PL011Registers, ifl),
- vmstate_of!(PL011Registers, read_pos),
- vmstate_of!(PL011Registers, read_count),
- vmstate_of!(PL011Registers, read_trigger),
- },
- ..Zeroable::ZERO
-};
-
-pub static VMSTATE_PL011: VMStateDescription = VMStateDescription {
- name: c"pl011".as_ptr(),
- version_id: 2,
- minimum_version_id: 2,
- post_load: Some(pl011_post_load),
- fields: vmstate_fields! {
- vmstate_unused!(core::mem::size_of::<u32>()),
- vmstate_struct!(PL011State, regs, &VMSTATE_PL011_REGS, BqlRefCell<PL011Registers>),
- },
- subsections: vmstate_subsections! {
- VMSTATE_PL011_CLOCK
- },
- ..Zeroable::ZERO
-};
-
-qemu_api::declare_properties! {
- PL011_PROPERTIES,
- qemu_api::define_property!(
- c"chardev",
- PL011State,
- char_backend,
- unsafe { &qdev_prop_chr },
- CharBackend
- ),
- qemu_api::define_property!(
- c"migrate-clk",
- PL011State,
- migrate_clock,
- unsafe { &qdev_prop_bool },
- bool,
- default = true
- ),
-}
diff --git a/rust/hw/char/pl011/src/lib.rs b/rust/hw/char/pl011/src/lib.rs
index 5c4fbc9..2b70d2f 100644
--- a/rust/hw/char/pl011/src/lib.rs
+++ b/rust/hw/char/pl011/src/lib.rs
@@ -13,7 +13,6 @@
//! the [`registers`] module for register types.
mod device;
-mod device_class;
mod registers;
pub use device::pl011_create;
diff --git a/rust/hw/timer/hpet/Cargo.toml b/rust/hw/timer/hpet/Cargo.toml
index 6f07502..ac5df23 100644
--- a/rust/hw/timer/hpet/Cargo.toml
+++ b/rust/hw/timer/hpet/Cargo.toml
@@ -10,9 +10,6 @@ license.workspace = true
repository.workspace = true
rust-version.workspace = true
-[lib]
-crate-type = ["staticlib"]
-
[dependencies]
qemu_api = { path = "../../../qemu-api" }
qemu_api_macros = { path = "../../../qemu-api-macros" }
diff --git a/rust/qemu-api-macros/meson.build b/rust/qemu-api-macros/meson.build
index 8610ce1..2152bcb 100644
--- a/rust/qemu-api-macros/meson.build
+++ b/rust/qemu-api-macros/meson.build
@@ -17,3 +17,6 @@ _qemu_api_macros_rs = rust.proc_macro(
qemu_api_macros = declare_dependency(
link_with: _qemu_api_macros_rs,
)
+
+rust.test('rust-qemu-api-macros-tests', _qemu_api_macros_rs,
+ suite: ['unit', 'rust'])
diff --git a/rust/qemu-api-macros/src/bits.rs b/rust/qemu-api-macros/src/bits.rs
index 5ba8475..a80a3b9 100644
--- a/rust/qemu-api-macros/src/bits.rs
+++ b/rust/qemu-api-macros/src/bits.rs
@@ -6,8 +6,7 @@
use proc_macro2::{
Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree, TokenTree as TT,
};
-
-use crate::utils::MacroError;
+use syn::Error;
pub struct BitsConstInternal {
typ: TokenTree,
@@ -36,27 +35,21 @@ impl BitsConstInternal {
tok: TokenTree,
it: &mut dyn Iterator<Item = TokenTree>,
out: &mut TokenStream,
- ) -> Result<Option<TokenTree>, MacroError> {
+ ) -> Result<Option<TokenTree>, Error> {
let next = match tok {
TT::Group(ref g) => {
if g.delimiter() != Delimiter::Parenthesis && g.delimiter() != Delimiter::None {
- return Err(MacroError::Message("expected parenthesis".into(), g.span()));
+ return Err(Error::new(g.span(), "expected parenthesis"));
}
let mut stream = g.stream().into_iter();
let Some(first_tok) = stream.next() else {
- return Err(MacroError::Message(
- "expected operand, found ')'".into(),
- g.span(),
- ));
+ return Err(Error::new(g.span(), "expected operand, found ')'"));
};
let mut output = TokenStream::new();
// start from the lowest precedence
let next = self.parse_or(first_tok, &mut stream, &mut output)?;
if let Some(tok) = next {
- return Err(MacroError::Message(
- format!("unexpected token {tok}"),
- tok.span(),
- ));
+ return Err(Error::new(tok.span(), format!("unexpected token {tok}")));
}
out.extend(Some(paren(output)));
it.next()
@@ -74,20 +67,17 @@ impl BitsConstInternal {
}
TT::Punct(ref p) => {
if p.as_char() != '!' {
- return Err(MacroError::Message("expected operand".into(), p.span()));
+ return Err(Error::new(p.span(), "expected operand"));
}
let Some(rhs_tok) = it.next() else {
- return Err(MacroError::Message(
- "expected operand at end of input".into(),
- p.span(),
- ));
+ return Err(Error::new(p.span(), "expected operand at end of input"));
};
let next = self.parse_primary(rhs_tok, it, out)?;
out.extend([punct('.'), ident("invert"), paren(TokenStream::new())]);
next
}
_ => {
- return Err(MacroError::Message("unexpected literal".into(), tok.span()));
+ return Err(Error::new(tok.span(), "unexpected literal"));
}
};
Ok(next)
@@ -99,7 +89,7 @@ impl BitsConstInternal {
TokenTree,
&mut dyn Iterator<Item = TokenTree>,
&mut TokenStream,
- ) -> Result<Option<TokenTree>, MacroError>,
+ ) -> Result<Option<TokenTree>, Error>,
>(
&self,
tok: TokenTree,
@@ -108,7 +98,7 @@ impl BitsConstInternal {
ch: char,
f: F,
method: &'static str,
- ) -> Result<Option<TokenTree>, MacroError> {
+ ) -> Result<Option<TokenTree>, Error> {
let mut next = f(self, tok, it, out)?;
while next.is_some() {
let op = next.as_ref().unwrap();
@@ -118,10 +108,7 @@ impl BitsConstInternal {
}
let Some(rhs_tok) = it.next() else {
- return Err(MacroError::Message(
- "expected operand at end of input".into(),
- p.span(),
- ));
+ return Err(Error::new(p.span(), "expected operand at end of input"));
};
let mut rhs = TokenStream::new();
next = f(self, rhs_tok, it, &mut rhs)?;
@@ -136,7 +123,7 @@ impl BitsConstInternal {
tok: TokenTree,
it: &mut dyn Iterator<Item = TokenTree>,
out: &mut TokenStream,
- ) -> Result<Option<TokenTree>, MacroError> {
+ ) -> Result<Option<TokenTree>, Error> {
self.parse_binop(tok, it, out, '-', Self::parse_primary, "difference")
}
@@ -146,7 +133,7 @@ impl BitsConstInternal {
tok: TokenTree,
it: &mut dyn Iterator<Item = TokenTree>,
out: &mut TokenStream,
- ) -> Result<Option<TokenTree>, MacroError> {
+ ) -> Result<Option<TokenTree>, Error> {
self.parse_binop(tok, it, out, '&', Self::parse_sub, "intersection")
}
@@ -156,7 +143,7 @@ impl BitsConstInternal {
tok: TokenTree,
it: &mut dyn Iterator<Item = TokenTree>,
out: &mut TokenStream,
- ) -> Result<Option<TokenTree>, MacroError> {
+ ) -> Result<Option<TokenTree>, Error> {
self.parse_binop(tok, it, out, '^', Self::parse_and, "symmetric_difference")
}
@@ -166,13 +153,13 @@ impl BitsConstInternal {
tok: TokenTree,
it: &mut dyn Iterator<Item = TokenTree>,
out: &mut TokenStream,
- ) -> Result<Option<TokenTree>, MacroError> {
+ ) -> Result<Option<TokenTree>, Error> {
self.parse_binop(tok, it, out, '|', Self::parse_xor, "union")
}
pub fn parse(
it: &mut dyn Iterator<Item = TokenTree>,
- ) -> Result<proc_macro2::TokenStream, MacroError> {
+ ) -> Result<proc_macro2::TokenStream, Error> {
let mut pos = Span::call_site();
let mut typ = proc_macro2::TokenStream::new();
@@ -198,15 +185,15 @@ impl BitsConstInternal {
};
let Some(tok) = next else {
- return Err(MacroError::Message(
- "expected expression, do not call this macro directly".into(),
+ return Err(Error::new(
pos,
+ "expected expression, do not call this macro directly",
));
};
let TT::Group(ref _group) = tok else {
- return Err(MacroError::Message(
- "expected parenthesis, do not call this macro directly".into(),
+ return Err(Error::new(
tok.span(),
+ "expected parenthesis, do not call this macro directly",
));
};
let mut out = TokenStream::new();
@@ -219,10 +206,7 @@ impl BitsConstInternal {
// A parenthesized expression is a single production of the grammar,
// so the input must have reached the last token.
if let Some(tok) = next {
- return Err(MacroError::Message(
- format!("unexpected token {tok}"),
- tok.span(),
- ));
+ return Err(Error::new(tok.span(), format!("unexpected token {tok}")));
}
Ok(out)
}
diff --git a/rust/qemu-api-macros/src/lib.rs b/rust/qemu-api-macros/src/lib.rs
index c18bb4e..b525d89 100644
--- a/rust/qemu-api-macros/src/lib.rs
+++ b/rust/qemu-api-macros/src/lib.rs
@@ -6,83 +6,82 @@ use proc_macro::TokenStream;
use quote::quote;
use syn::{
parse_macro_input, parse_quote, punctuated::Punctuated, spanned::Spanned, token::Comma, Data,
- DeriveInput, Field, Fields, FieldsUnnamed, Ident, Meta, Path, Token, Variant,
+ DeriveInput, Error, Field, Fields, FieldsUnnamed, Ident, Meta, Path, Token, Variant,
};
-
-mod utils;
-use utils::MacroError;
-
mod bits;
use bits::BitsConstInternal;
+#[cfg(test)]
+mod tests;
+
fn get_fields<'a>(
input: &'a DeriveInput,
msg: &str,
-) -> Result<&'a Punctuated<Field, Comma>, MacroError> {
+) -> Result<&'a Punctuated<Field, Comma>, Error> {
let Data::Struct(ref s) = &input.data else {
- return Err(MacroError::Message(
- format!("Struct required for {msg}"),
+ return Err(Error::new(
input.ident.span(),
+ format!("Struct required for {msg}"),
));
};
let Fields::Named(ref fs) = &s.fields else {
- return Err(MacroError::Message(
- format!("Named fields required for {msg}"),
+ return Err(Error::new(
input.ident.span(),
+ format!("Named fields required for {msg}"),
));
};
Ok(&fs.named)
}
-fn get_unnamed_field<'a>(input: &'a DeriveInput, msg: &str) -> Result<&'a Field, MacroError> {
+fn get_unnamed_field<'a>(input: &'a DeriveInput, msg: &str) -> Result<&'a Field, Error> {
let Data::Struct(ref s) = &input.data else {
- return Err(MacroError::Message(
- format!("Struct required for {msg}"),
+ return Err(Error::new(
input.ident.span(),
+ format!("Struct required for {msg}"),
));
};
let Fields::Unnamed(FieldsUnnamed { ref unnamed, .. }) = &s.fields else {
- return Err(MacroError::Message(
- format!("Tuple struct required for {msg}"),
+ return Err(Error::new(
s.fields.span(),
+ format!("Tuple struct required for {msg}"),
));
};
if unnamed.len() != 1 {
- return Err(MacroError::Message(
- format!("A single field is required for {msg}"),
+ return Err(Error::new(
s.fields.span(),
+ format!("A single field is required for {msg}"),
));
}
Ok(&unnamed[0])
}
-fn is_c_repr(input: &DeriveInput, msg: &str) -> Result<(), MacroError> {
+fn is_c_repr(input: &DeriveInput, msg: &str) -> Result<(), Error> {
let expected = parse_quote! { #[repr(C)] };
if input.attrs.iter().any(|attr| attr == &expected) {
Ok(())
} else {
- Err(MacroError::Message(
- format!("#[repr(C)] required for {msg}"),
+ Err(Error::new(
input.ident.span(),
+ format!("#[repr(C)] required for {msg}"),
))
}
}
-fn is_transparent_repr(input: &DeriveInput, msg: &str) -> Result<(), MacroError> {
+fn is_transparent_repr(input: &DeriveInput, msg: &str) -> Result<(), Error> {
let expected = parse_quote! { #[repr(transparent)] };
if input.attrs.iter().any(|attr| attr == &expected) {
Ok(())
} else {
- Err(MacroError::Message(
- format!("#[repr(transparent)] required for {msg}"),
+ Err(Error::new(
input.ident.span(),
+ format!("#[repr(transparent)] required for {msg}"),
))
}
}
-fn derive_object_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, MacroError> {
+fn derive_object_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, Error> {
is_c_repr(&input, "#[derive(Object)]")?;
let name = &input.ident;
@@ -103,12 +102,13 @@ fn derive_object_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream
#[proc_macro_derive(Object)]
pub fn derive_object(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
- let expanded = derive_object_or_error(input).unwrap_or_else(Into::into);
- TokenStream::from(expanded)
+ derive_object_or_error(input)
+ .unwrap_or_else(syn::Error::into_compile_error)
+ .into()
}
-fn derive_opaque_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, MacroError> {
+fn derive_opaque_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, Error> {
is_transparent_repr(&input, "#[derive(Wrapper)]")?;
let name = &input.ident;
@@ -149,13 +149,14 @@ fn derive_opaque_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream
#[proc_macro_derive(Wrapper)]
pub fn derive_opaque(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
- let expanded = derive_opaque_or_error(input).unwrap_or_else(Into::into);
- TokenStream::from(expanded)
+ derive_opaque_or_error(input)
+ .unwrap_or_else(syn::Error::into_compile_error)
+ .into()
}
#[allow(non_snake_case)]
-fn get_repr_uN(input: &DeriveInput, msg: &str) -> Result<Path, MacroError> {
+fn get_repr_uN(input: &DeriveInput, msg: &str) -> Result<Path, Error> {
let repr = input.attrs.iter().find(|attr| attr.path().is_ident("repr"));
if let Some(repr) = repr {
let nested = repr.parse_args_with(Punctuated::<Meta, Token![,]>::parse_terminated)?;
@@ -170,23 +171,23 @@ fn get_repr_uN(input: &DeriveInput, msg: &str) -> Result<Path, MacroError> {
}
}
- Err(MacroError::Message(
- format!("#[repr(u8/u16/u32/u64) required for {msg}"),
+ Err(Error::new(
input.ident.span(),
+ format!("#[repr(u8/u16/u32/u64) required for {msg}"),
))
}
-fn get_variants(input: &DeriveInput) -> Result<&Punctuated<Variant, Comma>, MacroError> {
+fn get_variants(input: &DeriveInput) -> Result<&Punctuated<Variant, Comma>, Error> {
let Data::Enum(ref e) = &input.data else {
- return Err(MacroError::Message(
- "Cannot derive TryInto for union or struct.".to_string(),
+ return Err(Error::new(
input.ident.span(),
+ "Cannot derive TryInto for union or struct.",
));
};
if let Some(v) = e.variants.iter().find(|v| v.fields != Fields::Unit) {
- return Err(MacroError::Message(
- "Cannot derive TryInto for enum with non-unit variants.".to_string(),
+ return Err(Error::new(
v.fields.span(),
+ "Cannot derive TryInto for enum with non-unit variants.",
));
}
Ok(&e.variants)
@@ -197,11 +198,11 @@ fn derive_tryinto_body(
name: &Ident,
variants: &Punctuated<Variant, Comma>,
repr: &Path,
-) -> Result<proc_macro2::TokenStream, MacroError> {
+) -> Result<proc_macro2::TokenStream, Error> {
let discriminants: Vec<&Ident> = variants.iter().map(|f| &f.ident).collect();
Ok(quote! {
- #(const #discriminants: #repr = #name::#discriminants as #repr;)*;
+ #(const #discriminants: #repr = #name::#discriminants as #repr;)*
match value {
#(#discriminants => core::result::Result::Ok(#name::#discriminants),)*
_ => core::result::Result::Err(value),
@@ -210,7 +211,7 @@ fn derive_tryinto_body(
}
#[rustfmt::skip::macros(quote)]
-fn derive_tryinto_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, MacroError> {
+fn derive_tryinto_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream, Error> {
let repr = get_repr_uN(&input, "#[derive(TryInto)]")?;
let name = &input.ident;
let body = derive_tryinto_body(name, get_variants(&input)?, &repr)?;
@@ -229,7 +230,7 @@ fn derive_tryinto_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStrea
#body
}) {
Ok(x) => x,
- Err(_) => panic!(#errmsg)
+ Err(_) => panic!(#errmsg),
}
}
}
@@ -247,9 +248,10 @@ fn derive_tryinto_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStrea
#[proc_macro_derive(TryInto)]
pub fn derive_tryinto(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
- let expanded = derive_tryinto_or_error(input).unwrap_or_else(Into::into);
- TokenStream::from(expanded)
+ derive_tryinto_or_error(input)
+ .unwrap_or_else(syn::Error::into_compile_error)
+ .into()
}
#[proc_macro]
@@ -257,6 +259,7 @@ pub fn bits_const_internal(ts: TokenStream) -> TokenStream {
let ts = proc_macro2::TokenStream::from(ts);
let mut it = ts.into_iter();
- let expanded = BitsConstInternal::parse(&mut it).unwrap_or_else(Into::into);
- TokenStream::from(expanded)
+ BitsConstInternal::parse(&mut it)
+ .unwrap_or_else(syn::Error::into_compile_error)
+ .into()
}
diff --git a/rust/qemu-api-macros/src/tests.rs b/rust/qemu-api-macros/src/tests.rs
new file mode 100644
index 0000000..d6dcd62
--- /dev/null
+++ b/rust/qemu-api-macros/src/tests.rs
@@ -0,0 +1,137 @@
+// Copyright 2025, Linaro Limited
+// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+use quote::quote;
+
+use super::*;
+
+macro_rules! derive_compile_fail {
+ ($derive_fn:ident, $input:expr, $error_msg:expr) => {{
+ let input: proc_macro2::TokenStream = $input;
+ let error_msg: &str = $error_msg;
+ let derive_fn: fn(input: syn::DeriveInput) -> Result<proc_macro2::TokenStream, syn::Error> =
+ $derive_fn;
+
+ let input: syn::DeriveInput = syn::parse2(input).unwrap();
+ let result = derive_fn(input);
+ let err = result.unwrap_err().into_compile_error();
+ assert_eq!(
+ err.to_string(),
+ quote! { ::core::compile_error! { #error_msg } }.to_string()
+ );
+ }};
+}
+
+macro_rules! derive_compile {
+ ($derive_fn:ident, $input:expr, $($expected:tt)*) => {{
+ let input: proc_macro2::TokenStream = $input;
+ let expected: proc_macro2::TokenStream = $($expected)*;
+ let derive_fn: fn(input: syn::DeriveInput) -> Result<proc_macro2::TokenStream, syn::Error> =
+ $derive_fn;
+
+ let input: syn::DeriveInput = syn::parse2(input).unwrap();
+ let result = derive_fn(input).unwrap();
+ assert_eq!(result.to_string(), expected.to_string());
+ }};
+}
+
+#[test]
+fn test_derive_object() {
+ derive_compile_fail!(
+ derive_object_or_error,
+ quote! {
+ #[derive(Object)]
+ struct Foo {
+ _unused: [u8; 0],
+ }
+ },
+ "#[repr(C)] required for #[derive(Object)]"
+ );
+ derive_compile!(
+ derive_object_or_error,
+ quote! {
+ #[derive(Object)]
+ #[repr(C)]
+ struct Foo {
+ _unused: [u8; 0],
+ }
+ },
+ quote! {
+ ::qemu_api::assert_field_type!(
+ Foo,
+ _unused,
+ ::qemu_api::qom::ParentField<<Foo as ::qemu_api::qom::ObjectImpl>::ParentType>
+ );
+ ::qemu_api::module_init! {
+ MODULE_INIT_QOM => unsafe {
+ ::qemu_api::bindings::type_register_static(&<Foo as ::qemu_api::qom::ObjectImpl>::TYPE_INFO);
+ }
+ }
+ }
+ );
+}
+
+#[test]
+fn test_derive_tryinto() {
+ derive_compile_fail!(
+ derive_tryinto_or_error,
+ quote! {
+ #[derive(TryInto)]
+ struct Foo {
+ _unused: [u8; 0],
+ }
+ },
+ "#[repr(u8/u16/u32/u64) required for #[derive(TryInto)]"
+ );
+ derive_compile!(
+ derive_tryinto_or_error,
+ quote! {
+ #[derive(TryInto)]
+ #[repr(u8)]
+ enum Foo {
+ First = 0,
+ Second,
+ }
+ },
+ quote! {
+ impl Foo {
+ #[allow(dead_code)]
+ pub const fn into_bits(self) -> u8 {
+ self as u8
+ }
+
+ #[allow(dead_code)]
+ pub const fn from_bits(value: u8) -> Self {
+ match ({
+ const First: u8 = Foo::First as u8;
+ const Second: u8 = Foo::Second as u8;
+ match value {
+ First => core::result::Result::Ok(Foo::First),
+ Second => core::result::Result::Ok(Foo::Second),
+ _ => core::result::Result::Err(value),
+ }
+ }) {
+ Ok(x) => x,
+ Err(_) => panic!("invalid value for Foo"),
+ }
+ }
+ }
+
+ impl core::convert::TryFrom<u8> for Foo {
+ type Error = u8;
+
+ #[allow(ambiguous_associated_items)]
+ fn try_from(value: u8) -> Result<Self, u8> {
+ const First: u8 = Foo::First as u8;
+ const Second: u8 = Foo::Second as u8;
+ match value {
+ First => core::result::Result::Ok(Foo::First),
+ Second => core::result::Result::Ok(Foo::Second),
+ _ => core::result::Result::Err(value),
+ }
+ }
+ }
+ }
+ );
+}
diff --git a/rust/qemu-api-macros/src/utils.rs b/rust/qemu-api-macros/src/utils.rs
deleted file mode 100644
index 02c91ae..0000000
--- a/rust/qemu-api-macros/src/utils.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-// Procedural macro utilities.
-// Author(s): Paolo Bonzini <pbonzini@redhat.com>
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-use proc_macro2::Span;
-use quote::quote_spanned;
-
-pub enum MacroError {
- Message(String, Span),
- ParseError(syn::Error),
-}
-
-impl From<syn::Error> for MacroError {
- fn from(err: syn::Error) -> Self {
- MacroError::ParseError(err)
- }
-}
-
-impl From<MacroError> for proc_macro2::TokenStream {
- fn from(err: MacroError) -> Self {
- match err {
- MacroError::Message(msg, span) => quote_spanned! { span => compile_error!(#msg); },
- MacroError::ParseError(err) => err.into_compile_error(),
- }
- }
-}
diff --git a/rust/qemu-api/build.rs b/rust/qemu-api/build.rs
index 7849486..29d0945 100644
--- a/rust/qemu-api/build.rs
+++ b/rust/qemu-api/build.rs
@@ -9,12 +9,14 @@ use std::os::windows::fs::symlink_file;
use std::{env, fs::remove_file, io::Result, path::Path};
fn main() -> Result<()> {
- // Placing bindings.inc.rs in the source directory is supported
- // but not documented or encouraged.
- let path = env::var("MESON_BUILD_ROOT")
- .unwrap_or_else(|_| format!("{}/src", env!("CARGO_MANIFEST_DIR")));
+ let file = if let Ok(root) = env::var("MESON_BUILD_ROOT") {
+ format!("{root}/rust/qemu-api/bindings.inc.rs")
+ } else {
+ // Placing bindings.inc.rs in the source directory is supported
+ // but not documented or encouraged.
+ format!("{}/src/bindings.inc.rs", env!("CARGO_MANIFEST_DIR"))
+ };
- let file = format!("{path}/rust/qemu-api/bindings.inc.rs");
let file = Path::new(&file);
if !Path::new(&file).exists() {
panic!(concat!(
diff --git a/rust/qemu-api/src/bindings.rs b/rust/qemu-api/src/bindings.rs
index 057de4b..b8104de 100644
--- a/rust/qemu-api/src/bindings.rs
+++ b/rust/qemu-api/src/bindings.rs
@@ -6,6 +6,7 @@
non_camel_case_types,
non_snake_case,
non_upper_case_globals,
+ unnecessary_transmutes,
unsafe_op_in_unsafe_fn,
clippy::pedantic,
clippy::restriction,
@@ -13,7 +14,8 @@
clippy::missing_const_for_fn,
clippy::ptr_offset_with_cast,
clippy::useless_transmute,
- clippy::missing_safety_doc
+ clippy::missing_safety_doc,
+ clippy::too_many_arguments
)]
//! `bindgen`-generated declarations.
diff --git a/rust/qemu-api/src/log.rs b/rust/qemu-api/src/log.rs
index d6c3d6c..a441b8c 100644
--- a/rust/qemu-api/src/log.rs
+++ b/rust/qemu-api/src/log.rs
@@ -3,6 +3,13 @@
//! Bindings for QEMU's logging infrastructure
+use std::{
+ io::{self, Write},
+ ptr::NonNull,
+};
+
+use crate::{bindings, errno};
+
#[repr(u32)]
/// Represents specific error categories within QEMU's logging system.
///
@@ -11,11 +18,82 @@
pub enum Log {
/// Log invalid access caused by the guest.
/// Corresponds to `LOG_GUEST_ERROR` in the C implementation.
- GuestError = crate::bindings::LOG_GUEST_ERROR,
+ GuestError = bindings::LOG_GUEST_ERROR,
/// Log guest access of unimplemented functionality.
/// Corresponds to `LOG_UNIMP` in the C implementation.
- Unimp = crate::bindings::LOG_UNIMP,
+ Unimp = bindings::LOG_UNIMP,
+}
+
+/// A RAII guard for QEMU's logging infrastructure. Creating the guard
+/// locks the log file, and dropping it (letting it go out of scope) unlocks
+/// the file.
+///
+/// As long as the guard lives, it can be written to using [`std::io::Write`].
+///
+/// The locking is recursive, therefore owning a guard does not prevent
+/// using [`log_mask_ln!()`](crate::log_mask_ln).
+pub struct LogGuard(NonNull<bindings::FILE>);
+
+impl LogGuard {
+ /// Return a RAII guard that writes to QEMU's logging infrastructure.
+ /// The log file is locked while the guard exists, ensuring that there
+ /// is no tearing of the messages.
+ ///
+ /// Return `None` if the log file is closed and could not be opened.
+ /// Do *not* use `unwrap()` on the result; failure can be handled simply
+ /// by not logging anything.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// # use qemu_api::log::LogGuard;
+ /// # use std::io::Write;
+ /// if let Some(mut log) = LogGuard::new() {
+ /// writeln!(log, "test");
+ /// }
+ /// ```
+ pub fn new() -> Option<Self> {
+ let f = unsafe { bindings::qemu_log_trylock() }.cast();
+ NonNull::new(f).map(Self)
+ }
+
+ /// Writes a formatted string into the log, returning any error encountered.
+ ///
+ /// This method is primarily used by the
+ /// [`log_mask_ln!()`](crate::log_mask_ln) macro, and it is rare for it
+ /// to be called explicitly. It is public because it is the only way to
+ /// examine the error, which `log_mask_ln!()` ignores
+ ///
+ /// Unlike `log_mask_ln!()`, it does *not* append a newline at the end.
+ pub fn log_fmt(args: std::fmt::Arguments) -> io::Result<()> {
+ if let Some(mut log) = Self::new() {
+ log.write_fmt(args)?;
+ }
+ Ok(())
+ }
+}
+
+impl Write for LogGuard {
+ fn write(&mut self, bytes: &[u8]) -> io::Result<usize> {
+ let ret = unsafe {
+ bindings::rust_fwrite(bytes.as_ptr().cast(), 1, bytes.len(), self.0.as_ptr())
+ };
+ errno::into_io_result(ret)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ // Do nothing, dropping the guard takes care of flushing
+ Ok(())
+ }
+}
+
+impl Drop for LogGuard {
+ fn drop(&mut self) {
+ unsafe {
+ bindings::qemu_log_unlock(self.0.as_ptr());
+ }
+ }
}
/// A macro to log messages conditionally based on a provided mask.
@@ -24,6 +102,8 @@ pub enum Log {
/// log level and, if so, formats and logs the message. It is the Rust
/// counterpart of the `qemu_log_mask()` macro in the C implementation.
///
+/// Errors from writing to the log are ignored.
+///
/// # Parameters
///
/// - `$mask`: A log level mask. This should be a variant of the `Log` enum.
@@ -62,12 +142,8 @@ macro_rules! log_mask_ln {
if unsafe {
(::qemu_api::bindings::qemu_loglevel & ($mask as std::os::raw::c_int)) != 0
} {
- let formatted_string = format!("{}\n", format_args!($fmt $($args)*));
- let c_string = std::ffi::CString::new(formatted_string).unwrap();
-
- unsafe {
- ::qemu_api::bindings::qemu_log(c_string.as_ptr());
- }
+ _ = ::qemu_api::log::LogGuard::log_fmt(
+ format_args!("{}\n", format_args!($fmt $($args)*)));
}
}};
}
generated by cgit v1.1 at 2025-08-03 16:41:26 +0000